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Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.9 by dl, Wed Mar 27 19:45:42 2013 UTC vs.
Revision 1.171 by jsr166, Wed Aug 24 22:22:39 2016 UTC

# Line 5 | Line 5
5   * http://creativecommons.org/publicdomain/zero/1.0/
6   */
7  
8 < import junit.framework.*;
8 > import static java.util.concurrent.TimeUnit.MILLISECONDS;
9 > import static java.util.concurrent.TimeUnit.SECONDS;
10 > import static java.util.concurrent.CompletableFuture.completedFuture;
11 > import static java.util.concurrent.CompletableFuture.failedFuture;
12 >
13 > import java.lang.reflect.Method;
14 > import java.lang.reflect.Modifier;
15 >
16 > import java.util.stream.Collectors;
17 > import java.util.stream.Stream;
18 >
19 > import java.util.ArrayList;
20 > import java.util.Arrays;
21 > import java.util.List;
22 > import java.util.Objects;
23 > import java.util.Set;
24   import java.util.concurrent.Callable;
10 import java.util.concurrent.Executor;
11 import java.util.concurrent.ExecutorService;
12 import java.util.concurrent.Executors;
25   import java.util.concurrent.CancellationException;
14 import java.util.concurrent.CountDownLatch;
15 import java.util.concurrent.ExecutionException;
16 import java.util.concurrent.Future;
26   import java.util.concurrent.CompletableFuture;
27   import java.util.concurrent.CompletionException;
28 + import java.util.concurrent.CompletionStage;
29 + import java.util.concurrent.ExecutionException;
30 + import java.util.concurrent.Executor;
31 + import java.util.concurrent.ForkJoinPool;
32 + import java.util.concurrent.ForkJoinTask;
33 + import java.util.concurrent.RejectedExecutionException;
34   import java.util.concurrent.TimeoutException;
35   import java.util.concurrent.atomic.AtomicInteger;
36 < import static java.util.concurrent.TimeUnit.MILLISECONDS;
22 < import static java.util.concurrent.TimeUnit.SECONDS;
23 < import java.util.*;
24 < import java.util.function.Supplier;
25 < import java.util.function.Consumer;
36 > import java.util.concurrent.atomic.AtomicReference;
37   import java.util.function.BiConsumer;
27 import java.util.function.Function;
38   import java.util.function.BiFunction;
39 + import java.util.function.Consumer;
40 + import java.util.function.Function;
41 + import java.util.function.Predicate;
42 + import java.util.function.Supplier;
43 +
44 + import junit.framework.AssertionFailedError;
45 + import junit.framework.Test;
46 + import junit.framework.TestSuite;
47  
48   public class CompletableFutureTest extends JSR166TestCase {
49  
50      public static void main(String[] args) {
51 <        junit.textui.TestRunner.run(suite());
51 >        main(suite(), args);
52      }
53      public static Test suite() {
54          return new TestSuite(CompletableFutureTest.class);
# Line 41 | Line 59 | public class CompletableFutureTest exten
59      void checkIncomplete(CompletableFuture<?> f) {
60          assertFalse(f.isDone());
61          assertFalse(f.isCancelled());
62 <        assertTrue(f.toString().contains("[Not completed]"));
62 >        assertTrue(f.toString().contains("Not completed"));
63          try {
64              assertNull(f.getNow(null));
65          } catch (Throwable fail) { threadUnexpectedException(fail); }
# Line 53 | Line 71 | public class CompletableFutureTest exten
71          catch (Throwable fail) { threadUnexpectedException(fail); }
72      }
73  
74 <    void checkCompletedNormally(CompletableFuture<?> f, Object value) {
74 >    <T> void checkCompletedNormally(CompletableFuture<T> f, T value) {
75 >        checkTimedGet(f, value);
76 >
77          try {
78              assertEquals(value, f.join());
79          } catch (Throwable fail) { threadUnexpectedException(fail); }
# Line 63 | Line 83 | public class CompletableFutureTest exten
83          try {
84              assertEquals(value, f.get());
85          } catch (Throwable fail) { threadUnexpectedException(fail); }
66        try {
67            assertEquals(value, f.get(0L, SECONDS));
68        } catch (Throwable fail) { threadUnexpectedException(fail); }
86          assertTrue(f.isDone());
87          assertFalse(f.isCancelled());
88 +        assertFalse(f.isCompletedExceptionally());
89          assertTrue(f.toString().contains("[Completed normally]"));
90      }
91  
92 <    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
92 >    /**
93 >     * Returns the "raw" internal exceptional completion of f,
94 >     * without any additional wrapping with CompletionException.
95 >     */
96 >    <U> Throwable exceptionalCompletion(CompletableFuture<U> f) {
97 >        // handle (and whenComplete) can distinguish between "direct"
98 >        // and "wrapped" exceptional completion
99 >        return f.handle((U u, Throwable t) -> t).join();
100 >    }
101 >
102 >    void checkCompletedExceptionally(CompletableFuture<?> f,
103 >                                     boolean wrapped,
104 >                                     Consumer<Throwable> checker) {
105 >        Throwable cause = exceptionalCompletion(f);
106 >        if (wrapped) {
107 >            assertTrue(cause instanceof CompletionException);
108 >            cause = cause.getCause();
109 >        }
110 >        checker.accept(cause);
111 >
112 >        long startTime = System.nanoTime();
113 >        try {
114 >            f.get(LONG_DELAY_MS, MILLISECONDS);
115 >            shouldThrow();
116 >        } catch (ExecutionException success) {
117 >            assertSame(cause, success.getCause());
118 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
119 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
120 >
121          try {
122              f.join();
123              shouldThrow();
124          } catch (CompletionException success) {
125 <            assertTrue(success.getCause() instanceof CFException);
126 <        }
125 >            assertSame(cause, success.getCause());
126 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
127 >
128          try {
129              f.getNow(null);
130              shouldThrow();
131          } catch (CompletionException success) {
132 <            assertTrue(success.getCause() instanceof CFException);
86 <        }
87 <        try {
88 <            f.get();
89 <            shouldThrow();
90 <        } catch (ExecutionException success) {
91 <            assertTrue(success.getCause() instanceof CFException);
132 >            assertSame(cause, success.getCause());
133          } catch (Throwable fail) { threadUnexpectedException(fail); }
134 +
135          try {
136 <            f.get(0L, SECONDS);
136 >            f.get();
137              shouldThrow();
138          } catch (ExecutionException success) {
139 <            assertTrue(success.getCause() instanceof CFException);
139 >            assertSame(cause, success.getCause());
140          } catch (Throwable fail) { threadUnexpectedException(fail); }
141 <        assertTrue(f.isDone());
141 >
142          assertFalse(f.isCancelled());
143 +        assertTrue(f.isDone());
144 +        assertTrue(f.isCompletedExceptionally());
145 +        assertTrue(f.toString().contains("[Completed exceptionally]"));
146 +    }
147 +
148 +    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
149 +        checkCompletedExceptionally(f, true,
150 +            (t) -> assertTrue(t instanceof CFException));
151 +    }
152 +
153 +    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
154 +        checkCompletedExceptionally(f, true,
155 +            (t) -> assertTrue(t instanceof CancellationException));
156 +    }
157 +
158 +    void checkCompletedWithTimeoutException(CompletableFuture<?> f) {
159 +        checkCompletedExceptionally(f, false,
160 +            (t) -> assertTrue(t instanceof TimeoutException));
161 +    }
162 +
163 +    void checkCompletedWithWrappedException(CompletableFuture<?> f,
164 +                                            Throwable ex) {
165 +        checkCompletedExceptionally(f, true, (t) -> assertSame(t, ex));
166 +    }
167 +
168 +    void checkCompletedExceptionally(CompletableFuture<?> f, Throwable ex) {
169 +        checkCompletedExceptionally(f, false, (t) -> assertSame(t, ex));
170      }
171  
172      void checkCancelled(CompletableFuture<?> f) {
173 +        long startTime = System.nanoTime();
174          try {
175 <            f.join();
106 <            shouldThrow();
107 <        } catch (CancellationException success) {}
108 <        try {
109 <            f.getNow(null);
110 <            shouldThrow();
111 <        } catch (CancellationException success) {}
112 <        try {
113 <            f.get();
114 <            shouldThrow();
115 <        } catch (CancellationException success) {
116 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
117 <        try {
118 <            f.get(0L, SECONDS);
175 >            f.get(LONG_DELAY_MS, MILLISECONDS);
176              shouldThrow();
177          } catch (CancellationException success) {
178          } catch (Throwable fail) { threadUnexpectedException(fail); }
179 <        assertTrue(f.isDone());
123 <        assertTrue(f.isCancelled());
124 <    }
179 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
180  
126    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
181          try {
182              f.join();
183              shouldThrow();
184 <        } catch (CompletionException success) {
131 <            assertTrue(success.getCause() instanceof CancellationException);
132 <        }
184 >        } catch (CancellationException success) {}
185          try {
186              f.getNow(null);
187              shouldThrow();
188 <        } catch (CompletionException success) {
137 <            assertTrue(success.getCause() instanceof CancellationException);
138 <        }
188 >        } catch (CancellationException success) {}
189          try {
190              f.get();
191              shouldThrow();
192 <        } catch (ExecutionException success) {
143 <            assertTrue(success.getCause() instanceof CancellationException);
144 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
145 <        try {
146 <            f.get(0L, SECONDS);
147 <            shouldThrow();
148 <        } catch (ExecutionException success) {
149 <            assertTrue(success.getCause() instanceof CancellationException);
192 >        } catch (CancellationException success) {
193          } catch (Throwable fail) { threadUnexpectedException(fail); }
194 +
195 +        assertTrue(exceptionalCompletion(f) instanceof CancellationException);
196 +
197          assertTrue(f.isDone());
198 <        assertFalse(f.isCancelled());
198 >        assertTrue(f.isCompletedExceptionally());
199 >        assertTrue(f.isCancelled());
200 >        assertTrue(f.toString().contains("[Completed exceptionally]"));
201      }
202  
203      /**
# Line 157 | Line 205 | public class CompletableFutureTest exten
205       * by methods isDone, isCancelled, and getNow
206       */
207      public void testConstructor() {
208 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
208 >        CompletableFuture<Integer> f = new CompletableFuture<>();
209          checkIncomplete(f);
210      }
211  
# Line 166 | Line 214 | public class CompletableFutureTest exten
214       * isCancelled, join, get, and getNow
215       */
216      public void testComplete() {
217 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
217 >        for (Integer v1 : new Integer[] { 1, null })
218 >    {
219 >        CompletableFuture<Integer> f = new CompletableFuture<>();
220          checkIncomplete(f);
221 <        f.complete(one);
222 <        checkCompletedNormally(f, one);
223 <    }
221 >        assertTrue(f.complete(v1));
222 >        assertFalse(f.complete(v1));
223 >        checkCompletedNormally(f, v1);
224 >    }}
225  
226      /**
227       * completeExceptionally completes exceptionally, as indicated by
228       * methods isDone, isCancelled, join, get, and getNow
229       */
230      public void testCompleteExceptionally() {
231 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
231 >        CompletableFuture<Integer> f = new CompletableFuture<>();
232 >        CFException ex = new CFException();
233          checkIncomplete(f);
234 <        f.completeExceptionally(new CFException());
235 <        checkCompletedWithWrappedCFException(f);
234 >        f.completeExceptionally(ex);
235 >        checkCompletedExceptionally(f, ex);
236      }
237  
238      /**
# Line 188 | Line 240 | public class CompletableFutureTest exten
240       * methods isDone, isCancelled, join, get, and getNow
241       */
242      public void testCancel() {
243 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
243 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
244 >    {
245 >        CompletableFuture<Integer> f = new CompletableFuture<>();
246          checkIncomplete(f);
247 <        assertTrue(f.cancel(true));
247 >        assertTrue(f.cancel(mayInterruptIfRunning));
248 >        assertTrue(f.cancel(mayInterruptIfRunning));
249 >        assertTrue(f.cancel(!mayInterruptIfRunning));
250          checkCancelled(f);
251 <    }
251 >    }}
252  
253      /**
254       * obtrudeValue forces completion with given value
255       */
256      public void testObtrudeValue() {
257 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
257 >        CompletableFuture<Integer> f = new CompletableFuture<>();
258          checkIncomplete(f);
259 <        f.complete(one);
259 >        assertTrue(f.complete(one));
260          checkCompletedNormally(f, one);
261          f.obtrudeValue(three);
262          checkCompletedNormally(f, three);
263          f.obtrudeValue(two);
264          checkCompletedNormally(f, two);
265 <        f = new CompletableFuture<Integer>();
265 >        f = new CompletableFuture<>();
266          f.obtrudeValue(three);
267          checkCompletedNormally(f, three);
268 <        f = new CompletableFuture<Integer>();
268 >        f.obtrudeValue(null);
269 >        checkCompletedNormally(f, null);
270 >        f = new CompletableFuture<>();
271          f.completeExceptionally(new CFException());
272          f.obtrudeValue(four);
273          checkCompletedNormally(f, four);
# Line 219 | Line 277 | public class CompletableFutureTest exten
277       * obtrudeException forces completion with given exception
278       */
279      public void testObtrudeException() {
280 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
281 <        checkIncomplete(f);
282 <        f.complete(one);
283 <        checkCompletedNormally(f, one);
284 <        f.obtrudeException(new CFException());
285 <        checkCompletedWithWrappedCFException(f);
286 <        f = new CompletableFuture<Integer>();
287 <        f.obtrudeException(new CFException());
288 <        checkCompletedWithWrappedCFException(f);
289 <        f = new CompletableFuture<Integer>();
280 >        for (Integer v1 : new Integer[] { 1, null })
281 >    {
282 >        CFException ex;
283 >        CompletableFuture<Integer> f;
284 >
285 >        f = new CompletableFuture<>();
286 >        assertTrue(f.complete(v1));
287 >        for (int i = 0; i < 2; i++) {
288 >            f.obtrudeException(ex = new CFException());
289 >            checkCompletedExceptionally(f, ex);
290 >        }
291 >
292 >        f = new CompletableFuture<>();
293 >        for (int i = 0; i < 2; i++) {
294 >            f.obtrudeException(ex = new CFException());
295 >            checkCompletedExceptionally(f, ex);
296 >        }
297 >
298 >        f = new CompletableFuture<>();
299 >        f.completeExceptionally(ex = new CFException());
300 >        f.obtrudeValue(v1);
301 >        checkCompletedNormally(f, v1);
302 >        f.obtrudeException(ex = new CFException());
303 >        checkCompletedExceptionally(f, ex);
304          f.completeExceptionally(new CFException());
305 <        f.obtrudeValue(four);
306 <        checkCompletedNormally(f, four);
307 <        f.obtrudeException(new CFException());
308 <        checkCompletedWithWrappedCFException(f);
237 <    }
305 >        checkCompletedExceptionally(f, ex);
306 >        assertFalse(f.complete(v1));
307 >        checkCompletedExceptionally(f, ex);
308 >    }}
309  
310      /**
311       * getNumberOfDependents returns number of dependent tasks
312       */
313      public void testGetNumberOfDependents() {
314 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
315 <        assertEquals(f.getNumberOfDependents(), 0);
316 <        CompletableFuture g = f.thenRun(new Noop());
317 <        assertEquals(f.getNumberOfDependents(), 1);
318 <        assertEquals(g.getNumberOfDependents(), 0);
319 <        CompletableFuture h = f.thenRun(new Noop());
320 <        assertEquals(f.getNumberOfDependents(), 2);
321 <        f.complete(1);
314 >        for (ExecutionMode m : ExecutionMode.values())
315 >        for (Integer v1 : new Integer[] { 1, null })
316 >    {
317 >        CompletableFuture<Integer> f = new CompletableFuture<>();
318 >        assertEquals(0, f.getNumberOfDependents());
319 >        final CompletableFuture<Void> g = m.thenRun(f, new Noop(m));
320 >        assertEquals(1, f.getNumberOfDependents());
321 >        assertEquals(0, g.getNumberOfDependents());
322 >        final CompletableFuture<Void> h = m.thenRun(f, new Noop(m));
323 >        assertEquals(2, f.getNumberOfDependents());
324 >        assertEquals(0, h.getNumberOfDependents());
325 >        assertTrue(f.complete(v1));
326          checkCompletedNormally(g, null);
327 <        assertEquals(f.getNumberOfDependents(), 0);
328 <        assertEquals(g.getNumberOfDependents(), 0);
329 <    }
330 <
327 >        checkCompletedNormally(h, null);
328 >        assertEquals(0, f.getNumberOfDependents());
329 >        assertEquals(0, g.getNumberOfDependents());
330 >        assertEquals(0, h.getNumberOfDependents());
331 >    }}
332  
333      /**
334       * toString indicates current completion state
# Line 263 | Line 339 | public class CompletableFutureTest exten
339          f = new CompletableFuture<String>();
340          assertTrue(f.toString().contains("[Not completed]"));
341  
342 <        f.complete("foo");
342 >        assertTrue(f.complete("foo"));
343          assertTrue(f.toString().contains("[Completed normally]"));
344  
345          f = new CompletableFuture<String>();
346 <        f.completeExceptionally(new IndexOutOfBoundsException());
346 >        assertTrue(f.completeExceptionally(new IndexOutOfBoundsException()));
347          assertTrue(f.toString().contains("[Completed exceptionally]"));
348 +
349 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
350 +            f = new CompletableFuture<String>();
351 +            assertTrue(f.cancel(mayInterruptIfRunning));
352 +            assertTrue(f.toString().contains("[Completed exceptionally]"));
353 +        }
354      }
355  
356      /**
357 <     * completedFuture returns a completed CompletableFuture with give value
357 >     * completedFuture returns a completed CompletableFuture with given value
358       */
359      public void testCompletedFuture() {
360          CompletableFuture<String> f = CompletableFuture.completedFuture("test");
361          checkCompletedNormally(f, "test");
362      }
363  
364 <    static final Supplier<Integer> supplyOne =
365 <        () -> Integer.valueOf(1);
366 <    static final Function<Integer, Integer> inc =
367 <        (Integer x) -> Integer.valueOf(x.intValue() + 1);
368 <    static final BiFunction<Integer, Integer, Integer> add =
369 <        (Integer x, Integer y) -> Integer.valueOf(x.intValue() + y.intValue());
370 <    static final class IncAction implements Consumer<Integer> {
371 <        int value;
372 <        public void accept(Integer x) { value = x.intValue() + 1; }
364 >    abstract class CheckedAction {
365 >        int invocationCount = 0;
366 >        final ExecutionMode m;
367 >        CheckedAction(ExecutionMode m) { this.m = m; }
368 >        void invoked() {
369 >            m.checkExecutionMode();
370 >            assertEquals(0, invocationCount++);
371 >        }
372 >        void assertNotInvoked() { assertEquals(0, invocationCount); }
373 >        void assertInvoked() { assertEquals(1, invocationCount); }
374 >    }
375 >
376 >    abstract class CheckedIntegerAction extends CheckedAction {
377 >        Integer value;
378 >        CheckedIntegerAction(ExecutionMode m) { super(m); }
379 >        void assertValue(Integer expected) {
380 >            assertInvoked();
381 >            assertEquals(expected, value);
382 >        }
383 >    }
384 >
385 >    class IntegerSupplier extends CheckedAction
386 >        implements Supplier<Integer>
387 >    {
388 >        final Integer value;
389 >        IntegerSupplier(ExecutionMode m, Integer value) {
390 >            super(m);
391 >            this.value = value;
392 >        }
393 >        public Integer get() {
394 >            invoked();
395 >            return value;
396 >        }
397 >    }
398 >
399 >    // A function that handles and produces null values as well.
400 >    static Integer inc(Integer x) {
401 >        return (x == null) ? null : x + 1;
402 >    }
403 >
404 >    class NoopConsumer extends CheckedIntegerAction
405 >        implements Consumer<Integer>
406 >    {
407 >        NoopConsumer(ExecutionMode m) { super(m); }
408 >        public void accept(Integer x) {
409 >            invoked();
410 >            value = x;
411 >        }
412 >    }
413 >
414 >    class IncFunction extends CheckedIntegerAction
415 >        implements Function<Integer,Integer>
416 >    {
417 >        IncFunction(ExecutionMode m) { super(m); }
418 >        public Integer apply(Integer x) {
419 >            invoked();
420 >            return value = inc(x);
421 >        }
422      }
423 <    static final class AddAction implements BiConsumer<Integer, Integer> {
424 <        int value;
423 >
424 >    // Choose non-commutative actions for better coverage
425 >    // A non-commutative function that handles and produces null values as well.
426 >    static Integer subtract(Integer x, Integer y) {
427 >        return (x == null && y == null) ? null :
428 >            ((x == null) ? 42 : x.intValue())
429 >            - ((y == null) ? 99 : y.intValue());
430 >    }
431 >
432 >    class SubtractAction extends CheckedIntegerAction
433 >        implements BiConsumer<Integer, Integer>
434 >    {
435 >        SubtractAction(ExecutionMode m) { super(m); }
436          public void accept(Integer x, Integer y) {
437 <            value = x.intValue() + y.intValue();
437 >            invoked();
438 >            value = subtract(x, y);
439 >        }
440 >    }
441 >
442 >    class SubtractFunction extends CheckedIntegerAction
443 >        implements BiFunction<Integer, Integer, Integer>
444 >    {
445 >        SubtractFunction(ExecutionMode m) { super(m); }
446 >        public Integer apply(Integer x, Integer y) {
447 >            invoked();
448 >            return value = subtract(x, y);
449          }
450      }
451 <    static final class Noop implements Runnable {
452 <        boolean ran;
453 <        public void run() { ran = true; }
451 >
452 >    class Noop extends CheckedAction implements Runnable {
453 >        Noop(ExecutionMode m) { super(m); }
454 >        public void run() {
455 >            invoked();
456 >        }
457      }
458  
459 <    static final class FailingSupplier implements Supplier<Integer> {
460 <        boolean ran;
461 <        public Integer get() { ran = true; throw new CFException(); }
459 >    class FailingSupplier extends CheckedAction
460 >        implements Supplier<Integer>
461 >    {
462 >        final CFException ex;
463 >        FailingSupplier(ExecutionMode m) { super(m); ex = new CFException(); }
464 >        public Integer get() {
465 >            invoked();
466 >            throw ex;
467 >        }
468      }
469 <    static final class FailingConsumer implements Consumer<Integer> {
470 <        boolean ran;
471 <        public void accept(Integer x) { ran = true; throw new CFException(); }
469 >
470 >    class FailingConsumer extends CheckedIntegerAction
471 >        implements Consumer<Integer>
472 >    {
473 >        final CFException ex;
474 >        FailingConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
475 >        public void accept(Integer x) {
476 >            invoked();
477 >            value = x;
478 >            throw ex;
479 >        }
480      }
481 <    static final class FailingBiConsumer implements BiConsumer<Integer, Integer> {
482 <        boolean ran;
483 <        public void accept(Integer x, Integer y) { ran = true; throw new CFException(); }
481 >
482 >    class FailingBiConsumer extends CheckedIntegerAction
483 >        implements BiConsumer<Integer, Integer>
484 >    {
485 >        final CFException ex;
486 >        FailingBiConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
487 >        public void accept(Integer x, Integer y) {
488 >            invoked();
489 >            value = subtract(x, y);
490 >            throw ex;
491 >        }
492      }
493 <    static final class FailingFunction implements Function<Integer, Integer> {
494 <        boolean ran;
495 <        public Integer apply(Integer x) { ran = true; throw new CFException(); }
493 >
494 >    class FailingFunction extends CheckedIntegerAction
495 >        implements Function<Integer, Integer>
496 >    {
497 >        final CFException ex;
498 >        FailingFunction(ExecutionMode m) { super(m); ex = new CFException(); }
499 >        public Integer apply(Integer x) {
500 >            invoked();
501 >            value = x;
502 >            throw ex;
503 >        }
504      }
505 <    static final class FailingBiFunction implements BiFunction<Integer, Integer, Integer> {
506 <        boolean ran;
507 <        public Integer apply(Integer x, Integer y) { ran = true; throw new CFException(); }
505 >
506 >    class FailingBiFunction extends CheckedIntegerAction
507 >        implements BiFunction<Integer, Integer, Integer>
508 >    {
509 >        final CFException ex;
510 >        FailingBiFunction(ExecutionMode m) { super(m); ex = new CFException(); }
511 >        public Integer apply(Integer x, Integer y) {
512 >            invoked();
513 >            value = subtract(x, y);
514 >            throw ex;
515 >        }
516      }
517 <    static final class FailingNoop implements Runnable {
518 <        boolean ran;
519 <        public void run() { ran = true; throw new CFException(); }
517 >
518 >    class FailingRunnable extends CheckedAction implements Runnable {
519 >        final CFException ex;
520 >        FailingRunnable(ExecutionMode m) { super(m); ex = new CFException(); }
521 >        public void run() {
522 >            invoked();
523 >            throw ex;
524 >        }
525      }
526  
527 <    static final class CompletableFutureInc implements Function<Integer, CompletableFuture<Integer>> {
527 >    class CompletableFutureInc extends CheckedIntegerAction
528 >        implements Function<Integer, CompletableFuture<Integer>>
529 >    {
530 >        CompletableFutureInc(ExecutionMode m) { super(m); }
531          public CompletableFuture<Integer> apply(Integer x) {
532 <            CompletableFuture<Integer> f = new CompletableFuture<Integer>();
533 <            f.complete(Integer.valueOf(x.intValue() + 1));
532 >            invoked();
533 >            value = x;
534 >            CompletableFuture<Integer> f = new CompletableFuture<>();
535 >            assertTrue(f.complete(inc(x)));
536              return f;
537          }
538      }
539  
540 <    static final class FailingCompletableFutureFunction implements Function<Integer, CompletableFuture<Integer>> {
541 <        boolean ran;
540 >    class FailingCompletableFutureFunction extends CheckedIntegerAction
541 >        implements Function<Integer, CompletableFuture<Integer>>
542 >    {
543 >        final CFException ex;
544 >        FailingCompletableFutureFunction(ExecutionMode m) { super(m); ex = new CFException(); }
545          public CompletableFuture<Integer> apply(Integer x) {
546 <            ran = true; throw new CFException();
546 >            invoked();
547 >            value = x;
548 >            throw ex;
549          }
550      }
551  
552 <    // Used for explicit executor tests
553 <    static final class ThreadExecutor implements Executor {
552 >    static class CountingRejectingExecutor implements Executor {
553 >        final RejectedExecutionException ex = new RejectedExecutionException();
554 >        final AtomicInteger count = new AtomicInteger(0);
555          public void execute(Runnable r) {
556 <            new Thread(r).start();
556 >            count.getAndIncrement();
557 >            throw ex;
558          }
559      }
560  
561 <    static final class ExceptionToInteger implements Function<Throwable, Integer> {
562 <        public Integer apply(Throwable x) { return Integer.valueOf(3); }
563 <    }
561 >    // Used for explicit executor tests
562 >    static final class ThreadExecutor implements Executor {
563 >        final AtomicInteger count = new AtomicInteger(0);
564 >        static final ThreadGroup tg = new ThreadGroup("ThreadExecutor");
565 >        static boolean startedCurrentThread() {
566 >            return Thread.currentThread().getThreadGroup() == tg;
567 >        }
568  
569 <    static final class IntegerHandler implements BiFunction<Integer, Throwable, Integer> {
570 <        public Integer apply(Integer x, Throwable t) {
571 <            return (t == null) ? two : three;
569 >        public void execute(Runnable r) {
570 >            count.getAndIncrement();
571 >            new Thread(tg, r).start();
572          }
573      }
574  
575 +    static final boolean defaultExecutorIsCommonPool
576 +        = ForkJoinPool.getCommonPoolParallelism() > 1;
577 +
578 +    /**
579 +     * Permits the testing of parallel code for the 3 different
580 +     * execution modes without copy/pasting all the test methods.
581 +     */
582 +    enum ExecutionMode {
583 +        SYNC {
584 +            public void checkExecutionMode() {
585 +                assertFalse(ThreadExecutor.startedCurrentThread());
586 +                assertNull(ForkJoinTask.getPool());
587 +            }
588 +            public CompletableFuture<Void> runAsync(Runnable a) {
589 +                throw new UnsupportedOperationException();
590 +            }
591 +            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
592 +                throw new UnsupportedOperationException();
593 +            }
594 +            public <T> CompletableFuture<Void> thenRun
595 +                (CompletableFuture<T> f, Runnable a) {
596 +                return f.thenRun(a);
597 +            }
598 +            public <T> CompletableFuture<Void> thenAccept
599 +                (CompletableFuture<T> f, Consumer<? super T> a) {
600 +                return f.thenAccept(a);
601 +            }
602 +            public <T,U> CompletableFuture<U> thenApply
603 +                (CompletableFuture<T> f, Function<? super T,U> a) {
604 +                return f.thenApply(a);
605 +            }
606 +            public <T,U> CompletableFuture<U> thenCompose
607 +                (CompletableFuture<T> f,
608 +                 Function<? super T,? extends CompletionStage<U>> a) {
609 +                return f.thenCompose(a);
610 +            }
611 +            public <T,U> CompletableFuture<U> handle
612 +                (CompletableFuture<T> f,
613 +                 BiFunction<? super T,Throwable,? extends U> a) {
614 +                return f.handle(a);
615 +            }
616 +            public <T> CompletableFuture<T> whenComplete
617 +                (CompletableFuture<T> f,
618 +                 BiConsumer<? super T,? super Throwable> a) {
619 +                return f.whenComplete(a);
620 +            }
621 +            public <T,U> CompletableFuture<Void> runAfterBoth
622 +                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
623 +                return f.runAfterBoth(g, a);
624 +            }
625 +            public <T,U> CompletableFuture<Void> thenAcceptBoth
626 +                (CompletableFuture<T> f,
627 +                 CompletionStage<? extends U> g,
628 +                 BiConsumer<? super T,? super U> a) {
629 +                return f.thenAcceptBoth(g, a);
630 +            }
631 +            public <T,U,V> CompletableFuture<V> thenCombine
632 +                (CompletableFuture<T> f,
633 +                 CompletionStage<? extends U> g,
634 +                 BiFunction<? super T,? super U,? extends V> a) {
635 +                return f.thenCombine(g, a);
636 +            }
637 +            public <T> CompletableFuture<Void> runAfterEither
638 +                (CompletableFuture<T> f,
639 +                 CompletionStage<?> g,
640 +                 java.lang.Runnable a) {
641 +                return f.runAfterEither(g, a);
642 +            }
643 +            public <T> CompletableFuture<Void> acceptEither
644 +                (CompletableFuture<T> f,
645 +                 CompletionStage<? extends T> g,
646 +                 Consumer<? super T> a) {
647 +                return f.acceptEither(g, a);
648 +            }
649 +            public <T,U> CompletableFuture<U> applyToEither
650 +                (CompletableFuture<T> f,
651 +                 CompletionStage<? extends T> g,
652 +                 Function<? super T,U> a) {
653 +                return f.applyToEither(g, a);
654 +            }
655 +        },
656 +
657 +        ASYNC {
658 +            public void checkExecutionMode() {
659 +                assertEquals(defaultExecutorIsCommonPool,
660 +                             (ForkJoinPool.commonPool() == ForkJoinTask.getPool()));
661 +            }
662 +            public CompletableFuture<Void> runAsync(Runnable a) {
663 +                return CompletableFuture.runAsync(a);
664 +            }
665 +            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
666 +                return CompletableFuture.supplyAsync(a);
667 +            }
668 +            public <T> CompletableFuture<Void> thenRun
669 +                (CompletableFuture<T> f, Runnable a) {
670 +                return f.thenRunAsync(a);
671 +            }
672 +            public <T> CompletableFuture<Void> thenAccept
673 +                (CompletableFuture<T> f, Consumer<? super T> a) {
674 +                return f.thenAcceptAsync(a);
675 +            }
676 +            public <T,U> CompletableFuture<U> thenApply
677 +                (CompletableFuture<T> f, Function<? super T,U> a) {
678 +                return f.thenApplyAsync(a);
679 +            }
680 +            public <T,U> CompletableFuture<U> thenCompose
681 +                (CompletableFuture<T> f,
682 +                 Function<? super T,? extends CompletionStage<U>> a) {
683 +                return f.thenComposeAsync(a);
684 +            }
685 +            public <T,U> CompletableFuture<U> handle
686 +                (CompletableFuture<T> f,
687 +                 BiFunction<? super T,Throwable,? extends U> a) {
688 +                return f.handleAsync(a);
689 +            }
690 +            public <T> CompletableFuture<T> whenComplete
691 +                (CompletableFuture<T> f,
692 +                 BiConsumer<? super T,? super Throwable> a) {
693 +                return f.whenCompleteAsync(a);
694 +            }
695 +            public <T,U> CompletableFuture<Void> runAfterBoth
696 +                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
697 +                return f.runAfterBothAsync(g, a);
698 +            }
699 +            public <T,U> CompletableFuture<Void> thenAcceptBoth
700 +                (CompletableFuture<T> f,
701 +                 CompletionStage<? extends U> g,
702 +                 BiConsumer<? super T,? super U> a) {
703 +                return f.thenAcceptBothAsync(g, a);
704 +            }
705 +            public <T,U,V> CompletableFuture<V> thenCombine
706 +                (CompletableFuture<T> f,
707 +                 CompletionStage<? extends U> g,
708 +                 BiFunction<? super T,? super U,? extends V> a) {
709 +                return f.thenCombineAsync(g, a);
710 +            }
711 +            public <T> CompletableFuture<Void> runAfterEither
712 +                (CompletableFuture<T> f,
713 +                 CompletionStage<?> g,
714 +                 java.lang.Runnable a) {
715 +                return f.runAfterEitherAsync(g, a);
716 +            }
717 +            public <T> CompletableFuture<Void> acceptEither
718 +                (CompletableFuture<T> f,
719 +                 CompletionStage<? extends T> g,
720 +                 Consumer<? super T> a) {
721 +                return f.acceptEitherAsync(g, a);
722 +            }
723 +            public <T,U> CompletableFuture<U> applyToEither
724 +                (CompletableFuture<T> f,
725 +                 CompletionStage<? extends T> g,
726 +                 Function<? super T,U> a) {
727 +                return f.applyToEitherAsync(g, a);
728 +            }
729 +        },
730 +
731 +        EXECUTOR {
732 +            public void checkExecutionMode() {
733 +                assertTrue(ThreadExecutor.startedCurrentThread());
734 +            }
735 +            public CompletableFuture<Void> runAsync(Runnable a) {
736 +                return CompletableFuture.runAsync(a, new ThreadExecutor());
737 +            }
738 +            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
739 +                return CompletableFuture.supplyAsync(a, new ThreadExecutor());
740 +            }
741 +            public <T> CompletableFuture<Void> thenRun
742 +                (CompletableFuture<T> f, Runnable a) {
743 +                return f.thenRunAsync(a, new ThreadExecutor());
744 +            }
745 +            public <T> CompletableFuture<Void> thenAccept
746 +                (CompletableFuture<T> f, Consumer<? super T> a) {
747 +                return f.thenAcceptAsync(a, new ThreadExecutor());
748 +            }
749 +            public <T,U> CompletableFuture<U> thenApply
750 +                (CompletableFuture<T> f, Function<? super T,U> a) {
751 +                return f.thenApplyAsync(a, new ThreadExecutor());
752 +            }
753 +            public <T,U> CompletableFuture<U> thenCompose
754 +                (CompletableFuture<T> f,
755 +                 Function<? super T,? extends CompletionStage<U>> a) {
756 +                return f.thenComposeAsync(a, new ThreadExecutor());
757 +            }
758 +            public <T,U> CompletableFuture<U> handle
759 +                (CompletableFuture<T> f,
760 +                 BiFunction<? super T,Throwable,? extends U> a) {
761 +                return f.handleAsync(a, new ThreadExecutor());
762 +            }
763 +            public <T> CompletableFuture<T> whenComplete
764 +                (CompletableFuture<T> f,
765 +                 BiConsumer<? super T,? super Throwable> a) {
766 +                return f.whenCompleteAsync(a, new ThreadExecutor());
767 +            }
768 +            public <T,U> CompletableFuture<Void> runAfterBoth
769 +                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
770 +                return f.runAfterBothAsync(g, a, new ThreadExecutor());
771 +            }
772 +            public <T,U> CompletableFuture<Void> thenAcceptBoth
773 +                (CompletableFuture<T> f,
774 +                 CompletionStage<? extends U> g,
775 +                 BiConsumer<? super T,? super U> a) {
776 +                return f.thenAcceptBothAsync(g, a, new ThreadExecutor());
777 +            }
778 +            public <T,U,V> CompletableFuture<V> thenCombine
779 +                (CompletableFuture<T> f,
780 +                 CompletionStage<? extends U> g,
781 +                 BiFunction<? super T,? super U,? extends V> a) {
782 +                return f.thenCombineAsync(g, a, new ThreadExecutor());
783 +            }
784 +            public <T> CompletableFuture<Void> runAfterEither
785 +                (CompletableFuture<T> f,
786 +                 CompletionStage<?> g,
787 +                 java.lang.Runnable a) {
788 +                return f.runAfterEitherAsync(g, a, new ThreadExecutor());
789 +            }
790 +            public <T> CompletableFuture<Void> acceptEither
791 +                (CompletableFuture<T> f,
792 +                 CompletionStage<? extends T> g,
793 +                 Consumer<? super T> a) {
794 +                return f.acceptEitherAsync(g, a, new ThreadExecutor());
795 +            }
796 +            public <T,U> CompletableFuture<U> applyToEither
797 +                (CompletableFuture<T> f,
798 +                 CompletionStage<? extends T> g,
799 +                 Function<? super T,U> a) {
800 +                return f.applyToEitherAsync(g, a, new ThreadExecutor());
801 +            }
802 +        };
803 +
804 +        public abstract void checkExecutionMode();
805 +        public abstract CompletableFuture<Void> runAsync(Runnable a);
806 +        public abstract <U> CompletableFuture<U> supplyAsync(Supplier<U> a);
807 +        public abstract <T> CompletableFuture<Void> thenRun
808 +            (CompletableFuture<T> f, Runnable a);
809 +        public abstract <T> CompletableFuture<Void> thenAccept
810 +            (CompletableFuture<T> f, Consumer<? super T> a);
811 +        public abstract <T,U> CompletableFuture<U> thenApply
812 +            (CompletableFuture<T> f, Function<? super T,U> a);
813 +        public abstract <T,U> CompletableFuture<U> thenCompose
814 +            (CompletableFuture<T> f,
815 +             Function<? super T,? extends CompletionStage<U>> a);
816 +        public abstract <T,U> CompletableFuture<U> handle
817 +            (CompletableFuture<T> f,
818 +             BiFunction<? super T,Throwable,? extends U> a);
819 +        public abstract <T> CompletableFuture<T> whenComplete
820 +            (CompletableFuture<T> f,
821 +             BiConsumer<? super T,? super Throwable> a);
822 +        public abstract <T,U> CompletableFuture<Void> runAfterBoth
823 +            (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a);
824 +        public abstract <T,U> CompletableFuture<Void> thenAcceptBoth
825 +            (CompletableFuture<T> f,
826 +             CompletionStage<? extends U> g,
827 +             BiConsumer<? super T,? super U> a);
828 +        public abstract <T,U,V> CompletableFuture<V> thenCombine
829 +            (CompletableFuture<T> f,
830 +             CompletionStage<? extends U> g,
831 +             BiFunction<? super T,? super U,? extends V> a);
832 +        public abstract <T> CompletableFuture<Void> runAfterEither
833 +            (CompletableFuture<T> f,
834 +             CompletionStage<?> g,
835 +             java.lang.Runnable a);
836 +        public abstract <T> CompletableFuture<Void> acceptEither
837 +            (CompletableFuture<T> f,
838 +             CompletionStage<? extends T> g,
839 +             Consumer<? super T> a);
840 +        public abstract <T,U> CompletableFuture<U> applyToEither
841 +            (CompletableFuture<T> f,
842 +             CompletionStage<? extends T> g,
843 +             Function<? super T,U> a);
844 +    }
845 +
846 +    /**
847 +     * exceptionally action is not invoked when source completes
848 +     * normally, and source result is propagated
849 +     */
850 +    public void testExceptionally_normalCompletion() {
851 +        for (boolean createIncomplete : new boolean[] { true, false })
852 +        for (Integer v1 : new Integer[] { 1, null })
853 +    {
854 +        final AtomicInteger a = new AtomicInteger(0);
855 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
856 +        if (!createIncomplete) assertTrue(f.complete(v1));
857 +        final CompletableFuture<Integer> g = f.exceptionally
858 +            ((Throwable t) -> {
859 +                a.getAndIncrement();
860 +                threadFail("should not be called");
861 +                return null;            // unreached
862 +            });
863 +        if (createIncomplete) assertTrue(f.complete(v1));
864 +
865 +        checkCompletedNormally(g, v1);
866 +        checkCompletedNormally(f, v1);
867 +        assertEquals(0, a.get());
868 +    }}
869  
870      /**
871       * exceptionally action completes with function value on source
872 <     * exception;  otherwise with source value
872 >     * exception
873       */
874 <    public void testExceptionally() {
875 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
876 <        ExceptionToInteger r = new ExceptionToInteger();
877 <        CompletableFuture<Integer> g = f.exceptionally(r);
878 <        f.completeExceptionally(new CFException());
879 <        checkCompletedNormally(g, three);
874 >    public void testExceptionally_exceptionalCompletion() {
875 >        for (boolean createIncomplete : new boolean[] { true, false })
876 >        for (Integer v1 : new Integer[] { 1, null })
877 >    {
878 >        final AtomicInteger a = new AtomicInteger(0);
879 >        final CFException ex = new CFException();
880 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
881 >        if (!createIncomplete) f.completeExceptionally(ex);
882 >        final CompletableFuture<Integer> g = f.exceptionally
883 >            ((Throwable t) -> {
884 >                ExecutionMode.SYNC.checkExecutionMode();
885 >                threadAssertSame(t, ex);
886 >                a.getAndIncrement();
887 >                return v1;
888 >            });
889 >        if (createIncomplete) f.completeExceptionally(ex);
890 >
891 >        checkCompletedNormally(g, v1);
892 >        assertEquals(1, a.get());
893 >    }}
894 >
895 >    /**
896 >     * If an "exceptionally action" throws an exception, it completes
897 >     * exceptionally with that exception
898 >     */
899 >    public void testExceptionally_exceptionalCompletionActionFailed() {
900 >        for (boolean createIncomplete : new boolean[] { true, false })
901 >    {
902 >        final AtomicInteger a = new AtomicInteger(0);
903 >        final CFException ex1 = new CFException();
904 >        final CFException ex2 = new CFException();
905 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
906 >        if (!createIncomplete) f.completeExceptionally(ex1);
907 >        final CompletableFuture<Integer> g = f.exceptionally
908 >            ((Throwable t) -> {
909 >                ExecutionMode.SYNC.checkExecutionMode();
910 >                threadAssertSame(t, ex1);
911 >                a.getAndIncrement();
912 >                throw ex2;
913 >            });
914 >        if (createIncomplete) f.completeExceptionally(ex1);
915 >
916 >        checkCompletedWithWrappedException(g, ex2);
917 >        checkCompletedExceptionally(f, ex1);
918 >        assertEquals(1, a.get());
919 >    }}
920 >
921 >    /**
922 >     * whenComplete action executes on normal completion, propagating
923 >     * source result.
924 >     */
925 >    public void testWhenComplete_normalCompletion() {
926 >        for (ExecutionMode m : ExecutionMode.values())
927 >        for (boolean createIncomplete : new boolean[] { true, false })
928 >        for (Integer v1 : new Integer[] { 1, null })
929 >    {
930 >        final AtomicInteger a = new AtomicInteger(0);
931 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
932 >        if (!createIncomplete) assertTrue(f.complete(v1));
933 >        final CompletableFuture<Integer> g = m.whenComplete
934 >            (f,
935 >             (Integer result, Throwable t) -> {
936 >                m.checkExecutionMode();
937 >                threadAssertSame(result, v1);
938 >                threadAssertNull(t);
939 >                a.getAndIncrement();
940 >            });
941 >        if (createIncomplete) assertTrue(f.complete(v1));
942 >
943 >        checkCompletedNormally(g, v1);
944 >        checkCompletedNormally(f, v1);
945 >        assertEquals(1, a.get());
946 >    }}
947 >
948 >    /**
949 >     * whenComplete action executes on exceptional completion, propagating
950 >     * source result.
951 >     */
952 >    public void testWhenComplete_exceptionalCompletion() {
953 >        for (ExecutionMode m : ExecutionMode.values())
954 >        for (boolean createIncomplete : new boolean[] { true, false })
955 >    {
956 >        final AtomicInteger a = new AtomicInteger(0);
957 >        final CFException ex = new CFException();
958 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
959 >        if (!createIncomplete) f.completeExceptionally(ex);
960 >        final CompletableFuture<Integer> g = m.whenComplete
961 >            (f,
962 >             (Integer result, Throwable t) -> {
963 >                m.checkExecutionMode();
964 >                threadAssertNull(result);
965 >                threadAssertSame(t, ex);
966 >                a.getAndIncrement();
967 >            });
968 >        if (createIncomplete) f.completeExceptionally(ex);
969 >
970 >        checkCompletedWithWrappedException(g, ex);
971 >        checkCompletedExceptionally(f, ex);
972 >        assertEquals(1, a.get());
973 >    }}
974 >
975 >    /**
976 >     * whenComplete action executes on cancelled source, propagating
977 >     * CancellationException.
978 >     */
979 >    public void testWhenComplete_sourceCancelled() {
980 >        for (ExecutionMode m : ExecutionMode.values())
981 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
982 >        for (boolean createIncomplete : new boolean[] { true, false })
983 >    {
984 >        final AtomicInteger a = new AtomicInteger(0);
985 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
986 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
987 >        final CompletableFuture<Integer> g = m.whenComplete
988 >            (f,
989 >             (Integer result, Throwable t) -> {
990 >                m.checkExecutionMode();
991 >                threadAssertNull(result);
992 >                threadAssertTrue(t instanceof CancellationException);
993 >                a.getAndIncrement();
994 >            });
995 >        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
996  
997 <        f = new CompletableFuture<Integer>();
998 <        r = new ExceptionToInteger();
999 <        g = f.exceptionally(r);
1000 <        f.complete(one);
376 <        checkCompletedNormally(g, one);
377 <    }
997 >        checkCompletedWithWrappedCancellationException(g);
998 >        checkCancelled(f);
999 >        assertEquals(1, a.get());
1000 >    }}
1001  
1002      /**
1003 <     * handle action completes normally with function value on either
1004 <     * normal or exceptional completion of source
1003 >     * If a whenComplete action throws an exception when triggered by
1004 >     * a normal completion, it completes exceptionally
1005       */
1006 <    public void testHandle() {
1007 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1008 <        IntegerHandler r = new IntegerHandler();
1009 <        CompletableFuture<Integer> g = f.handle(r);
1010 <        f.completeExceptionally(new CFException());
1011 <        checkCompletedNormally(g, three);
1006 >    public void testWhenComplete_sourceCompletedNormallyActionFailed() {
1007 >        for (boolean createIncomplete : new boolean[] { true, false })
1008 >        for (ExecutionMode m : ExecutionMode.values())
1009 >        for (Integer v1 : new Integer[] { 1, null })
1010 >    {
1011 >        final AtomicInteger a = new AtomicInteger(0);
1012 >        final CFException ex = new CFException();
1013 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1014 >        if (!createIncomplete) assertTrue(f.complete(v1));
1015 >        final CompletableFuture<Integer> g = m.whenComplete
1016 >            (f,
1017 >             (Integer result, Throwable t) -> {
1018 >                m.checkExecutionMode();
1019 >                threadAssertSame(result, v1);
1020 >                threadAssertNull(t);
1021 >                a.getAndIncrement();
1022 >                throw ex;
1023 >            });
1024 >        if (createIncomplete) assertTrue(f.complete(v1));
1025 >
1026 >        checkCompletedWithWrappedException(g, ex);
1027 >        checkCompletedNormally(f, v1);
1028 >        assertEquals(1, a.get());
1029 >    }}
1030 >
1031 >    /**
1032 >     * If a whenComplete action throws an exception when triggered by
1033 >     * a source completion that also throws an exception, the source
1034 >     * exception takes precedence (unlike handle)
1035 >     */
1036 >    public void testWhenComplete_sourceFailedActionFailed() {
1037 >        for (boolean createIncomplete : new boolean[] { true, false })
1038 >        for (ExecutionMode m : ExecutionMode.values())
1039 >    {
1040 >        final AtomicInteger a = new AtomicInteger(0);
1041 >        final CFException ex1 = new CFException();
1042 >        final CFException ex2 = new CFException();
1043 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1044 >
1045 >        if (!createIncomplete) f.completeExceptionally(ex1);
1046 >        final CompletableFuture<Integer> g = m.whenComplete
1047 >            (f,
1048 >             (Integer result, Throwable t) -> {
1049 >                m.checkExecutionMode();
1050 >                threadAssertSame(t, ex1);
1051 >                threadAssertNull(result);
1052 >                a.getAndIncrement();
1053 >                throw ex2;
1054 >            });
1055 >        if (createIncomplete) f.completeExceptionally(ex1);
1056 >
1057 >        checkCompletedWithWrappedException(g, ex1);
1058 >        checkCompletedExceptionally(f, ex1);
1059 >        if (testImplementationDetails) {
1060 >            assertEquals(1, ex1.getSuppressed().length);
1061 >            assertSame(ex2, ex1.getSuppressed()[0]);
1062 >        }
1063 >        assertEquals(1, a.get());
1064 >    }}
1065  
1066 <        f = new CompletableFuture<Integer>();
1067 <        r = new IntegerHandler();
1068 <        g = f.handle(r);
1069 <        f.complete(one);
1070 <        checkCompletedNormally(g, two);
1071 <    }
1066 >    /**
1067 >     * handle action completes normally with function value on normal
1068 >     * completion of source
1069 >     */
1070 >    public void testHandle_normalCompletion() {
1071 >        for (ExecutionMode m : ExecutionMode.values())
1072 >        for (boolean createIncomplete : new boolean[] { true, false })
1073 >        for (Integer v1 : new Integer[] { 1, null })
1074 >    {
1075 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1076 >        final AtomicInteger a = new AtomicInteger(0);
1077 >        if (!createIncomplete) assertTrue(f.complete(v1));
1078 >        final CompletableFuture<Integer> g = m.handle
1079 >            (f,
1080 >             (Integer result, Throwable t) -> {
1081 >                m.checkExecutionMode();
1082 >                threadAssertSame(result, v1);
1083 >                threadAssertNull(t);
1084 >                a.getAndIncrement();
1085 >                return inc(v1);
1086 >            });
1087 >        if (createIncomplete) assertTrue(f.complete(v1));
1088 >
1089 >        checkCompletedNormally(g, inc(v1));
1090 >        checkCompletedNormally(f, v1);
1091 >        assertEquals(1, a.get());
1092 >    }}
1093  
1094      /**
1095 <     * runAsync completes after running Runnable
1095 >     * handle action completes normally with function value on
1096 >     * exceptional completion of source
1097       */
1098 <    public void testRunAsync() {
1099 <        Noop r = new Noop();
1100 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r);
1101 <        assertNull(f.join());
1102 <        assertTrue(r.ran);
1103 <    }
1098 >    public void testHandle_exceptionalCompletion() {
1099 >        for (ExecutionMode m : ExecutionMode.values())
1100 >        for (boolean createIncomplete : new boolean[] { true, false })
1101 >        for (Integer v1 : new Integer[] { 1, null })
1102 >    {
1103 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1104 >        final AtomicInteger a = new AtomicInteger(0);
1105 >        final CFException ex = new CFException();
1106 >        if (!createIncomplete) f.completeExceptionally(ex);
1107 >        final CompletableFuture<Integer> g = m.handle
1108 >            (f,
1109 >             (Integer result, Throwable t) -> {
1110 >                m.checkExecutionMode();
1111 >                threadAssertNull(result);
1112 >                threadAssertSame(t, ex);
1113 >                a.getAndIncrement();
1114 >                return v1;
1115 >            });
1116 >        if (createIncomplete) f.completeExceptionally(ex);
1117 >
1118 >        checkCompletedNormally(g, v1);
1119 >        checkCompletedExceptionally(f, ex);
1120 >        assertEquals(1, a.get());
1121 >    }}
1122 >
1123 >    /**
1124 >     * handle action completes normally with function value on
1125 >     * cancelled source
1126 >     */
1127 >    public void testHandle_sourceCancelled() {
1128 >        for (ExecutionMode m : ExecutionMode.values())
1129 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1130 >        for (boolean createIncomplete : new boolean[] { true, false })
1131 >        for (Integer v1 : new Integer[] { 1, null })
1132 >    {
1133 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1134 >        final AtomicInteger a = new AtomicInteger(0);
1135 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1136 >        final CompletableFuture<Integer> g = m.handle
1137 >            (f,
1138 >             (Integer result, Throwable t) -> {
1139 >                m.checkExecutionMode();
1140 >                threadAssertNull(result);
1141 >                threadAssertTrue(t instanceof CancellationException);
1142 >                a.getAndIncrement();
1143 >                return v1;
1144 >            });
1145 >        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1146 >
1147 >        checkCompletedNormally(g, v1);
1148 >        checkCancelled(f);
1149 >        assertEquals(1, a.get());
1150 >    }}
1151  
1152      /**
1153 <     * runAsync with executor completes after running Runnable
1153 >     * If a "handle action" throws an exception when triggered by
1154 >     * a normal completion, it completes exceptionally
1155       */
1156 <    public void testRunAsync2() {
1157 <        Noop r = new Noop();
1158 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r, new ThreadExecutor());
1159 <        assertNull(f.join());
1160 <        assertTrue(r.ran);
1161 <    }
1156 >    public void testHandle_sourceCompletedNormallyActionFailed() {
1157 >        for (ExecutionMode m : ExecutionMode.values())
1158 >        for (boolean createIncomplete : new boolean[] { true, false })
1159 >        for (Integer v1 : new Integer[] { 1, null })
1160 >    {
1161 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1162 >        final AtomicInteger a = new AtomicInteger(0);
1163 >        final CFException ex = new CFException();
1164 >        if (!createIncomplete) assertTrue(f.complete(v1));
1165 >        final CompletableFuture<Integer> g = m.handle
1166 >            (f,
1167 >             (Integer result, Throwable t) -> {
1168 >                m.checkExecutionMode();
1169 >                threadAssertSame(result, v1);
1170 >                threadAssertNull(t);
1171 >                a.getAndIncrement();
1172 >                throw ex;
1173 >            });
1174 >        if (createIncomplete) assertTrue(f.complete(v1));
1175 >
1176 >        checkCompletedWithWrappedException(g, ex);
1177 >        checkCompletedNormally(f, v1);
1178 >        assertEquals(1, a.get());
1179 >    }}
1180 >
1181 >    /**
1182 >     * If a "handle action" throws an exception when triggered by
1183 >     * a source completion that also throws an exception, the action
1184 >     * exception takes precedence (unlike whenComplete)
1185 >     */
1186 >    public void testHandle_sourceFailedActionFailed() {
1187 >        for (boolean createIncomplete : new boolean[] { true, false })
1188 >        for (ExecutionMode m : ExecutionMode.values())
1189 >    {
1190 >        final AtomicInteger a = new AtomicInteger(0);
1191 >        final CFException ex1 = new CFException();
1192 >        final CFException ex2 = new CFException();
1193 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1194 >
1195 >        if (!createIncomplete) f.completeExceptionally(ex1);
1196 >        final CompletableFuture<Integer> g = m.handle
1197 >            (f,
1198 >             (Integer result, Throwable t) -> {
1199 >                m.checkExecutionMode();
1200 >                threadAssertNull(result);
1201 >                threadAssertSame(ex1, t);
1202 >                a.getAndIncrement();
1203 >                throw ex2;
1204 >            });
1205 >        if (createIncomplete) f.completeExceptionally(ex1);
1206 >
1207 >        checkCompletedWithWrappedException(g, ex2);
1208 >        checkCompletedExceptionally(f, ex1);
1209 >        assertEquals(1, a.get());
1210 >    }}
1211  
1212      /**
1213 <     * failing runAsync completes exceptionally after running Runnable
1213 >     * runAsync completes after running Runnable
1214       */
1215 <    public void testRunAsync3() {
1216 <        FailingNoop r = new FailingNoop();
1217 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r);
1218 <        checkCompletedWithWrappedCFException(f);
1219 <        assertTrue(r.ran);
1220 <    }
1215 >    public void testRunAsync_normalCompletion() {
1216 >        ExecutionMode[] executionModes = {
1217 >            ExecutionMode.ASYNC,
1218 >            ExecutionMode.EXECUTOR,
1219 >        };
1220 >        for (ExecutionMode m : executionModes)
1221 >    {
1222 >        final Noop r = new Noop(m);
1223 >        final CompletableFuture<Void> f = m.runAsync(r);
1224 >        assertNull(f.join());
1225 >        checkCompletedNormally(f, null);
1226 >        r.assertInvoked();
1227 >    }}
1228  
1229      /**
1230 <     * supplyAsync completes with result of supplier
1230 >     * failing runAsync completes exceptionally after running Runnable
1231       */
1232 <    public void testSupplyAsync() {
1233 <        CompletableFuture<Integer> f = CompletableFuture.supplyAsync(supplyOne);
1234 <        assertEquals(f.join(), one);
1232 >    public void testRunAsync_exceptionalCompletion() {
1233 >        ExecutionMode[] executionModes = {
1234 >            ExecutionMode.ASYNC,
1235 >            ExecutionMode.EXECUTOR,
1236 >        };
1237 >        for (ExecutionMode m : executionModes)
1238 >    {
1239 >        final FailingRunnable r = new FailingRunnable(m);
1240 >        final CompletableFuture<Void> f = m.runAsync(r);
1241 >        checkCompletedWithWrappedException(f, r.ex);
1242 >        r.assertInvoked();
1243 >    }}
1244 >
1245 >    public void testRunAsync_rejectingExecutor() {
1246 >        CountingRejectingExecutor e = new CountingRejectingExecutor();
1247 >        try {
1248 >            CompletableFuture.runAsync(() -> {}, e);
1249 >            shouldThrow();
1250 >        } catch (Throwable t) {
1251 >            assertSame(e.ex, t);
1252 >        }
1253 >
1254 >        assertEquals(1, e.count.get());
1255      }
1256  
1257      /**
1258 <     * supplyAsync with executor completes with result of supplier
1258 >     * supplyAsync completes with result of supplier
1259       */
1260 <    public void testSupplyAsync2() {
1261 <        CompletableFuture<Integer> f = CompletableFuture.supplyAsync(supplyOne, new ThreadExecutor());
1262 <        assertEquals(f.join(), one);
1263 <    }
1260 >    public void testSupplyAsync_normalCompletion() {
1261 >        ExecutionMode[] executionModes = {
1262 >            ExecutionMode.ASYNC,
1263 >            ExecutionMode.EXECUTOR,
1264 >        };
1265 >        for (ExecutionMode m : executionModes)
1266 >        for (Integer v1 : new Integer[] { 1, null })
1267 >    {
1268 >        final IntegerSupplier r = new IntegerSupplier(m, v1);
1269 >        final CompletableFuture<Integer> f = m.supplyAsync(r);
1270 >        assertSame(v1, f.join());
1271 >        checkCompletedNormally(f, v1);
1272 >        r.assertInvoked();
1273 >    }}
1274  
1275      /**
1276       * Failing supplyAsync completes exceptionally
1277       */
1278 <    public void testSupplyAsync3() {
1279 <        FailingSupplier r = new FailingSupplier();
1280 <        CompletableFuture<Integer> f = CompletableFuture.supplyAsync(r);
1281 <        checkCompletedWithWrappedCFException(f);
1282 <        assertTrue(r.ran);
1278 >    public void testSupplyAsync_exceptionalCompletion() {
1279 >        ExecutionMode[] executionModes = {
1280 >            ExecutionMode.ASYNC,
1281 >            ExecutionMode.EXECUTOR,
1282 >        };
1283 >        for (ExecutionMode m : executionModes)
1284 >    {
1285 >        FailingSupplier r = new FailingSupplier(m);
1286 >        CompletableFuture<Integer> f = m.supplyAsync(r);
1287 >        checkCompletedWithWrappedException(f, r.ex);
1288 >        r.assertInvoked();
1289 >    }}
1290 >
1291 >    public void testSupplyAsync_rejectingExecutor() {
1292 >        CountingRejectingExecutor e = new CountingRejectingExecutor();
1293 >        try {
1294 >            CompletableFuture.supplyAsync(() -> null, e);
1295 >            shouldThrow();
1296 >        } catch (Throwable t) {
1297 >            assertSame(e.ex, t);
1298 >        }
1299 >
1300 >        assertEquals(1, e.count.get());
1301      }
1302  
1303      // seq completion methods
# Line 455 | Line 1305 | public class CompletableFutureTest exten
1305      /**
1306       * thenRun result completes normally after normal completion of source
1307       */
1308 <    public void testThenRun() {
1309 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1310 <        Noop r = new Noop();
1311 <        CompletableFuture<Void> g = f.thenRun(r);
1312 <        f.complete(null);
1313 <        checkCompletedNormally(g, null);
1314 <        // reordered version
1315 <        f = new CompletableFuture<Integer>();
1316 <        f.complete(null);
1317 <        r = new Noop();
1318 <        g = f.thenRun(r);
1319 <        checkCompletedNormally(g, null);
1320 <    }
1308 >    public void testThenRun_normalCompletion() {
1309 >        for (ExecutionMode m : ExecutionMode.values())
1310 >        for (Integer v1 : new Integer[] { 1, null })
1311 >    {
1312 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1313 >        final Noop[] rs = new Noop[6];
1314 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1315 >
1316 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1317 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1318 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1319 >        checkIncomplete(h0);
1320 >        checkIncomplete(h1);
1321 >        checkIncomplete(h2);
1322 >        assertTrue(f.complete(v1));
1323 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1324 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1325 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1326 >
1327 >        checkCompletedNormally(h0, null);
1328 >        checkCompletedNormally(h1, null);
1329 >        checkCompletedNormally(h2, null);
1330 >        checkCompletedNormally(h3, null);
1331 >        checkCompletedNormally(h4, null);
1332 >        checkCompletedNormally(h5, null);
1333 >        checkCompletedNormally(f, v1);
1334 >        for (Noop r : rs) r.assertInvoked();
1335 >    }}
1336  
1337      /**
1338       * thenRun result completes exceptionally after exceptional
1339       * completion of source
1340       */
1341 <    public void testThenRun2() {
1342 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1343 <        Noop r = new Noop();
1344 <        CompletableFuture<Void> g = f.thenRun(r);
1345 <        f.completeExceptionally(new CFException());
1346 <        checkCompletedWithWrappedCFException(g);
1347 <    }
1341 >    public void testThenRun_exceptionalCompletion() {
1342 >        for (ExecutionMode m : ExecutionMode.values())
1343 >    {
1344 >        final CFException ex = new CFException();
1345 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1346 >        final Noop[] rs = new Noop[6];
1347 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1348 >
1349 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1350 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1351 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1352 >        checkIncomplete(h0);
1353 >        checkIncomplete(h1);
1354 >        checkIncomplete(h2);
1355 >        assertTrue(f.completeExceptionally(ex));
1356 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1357 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1358 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1359 >
1360 >        checkCompletedWithWrappedException(h0, ex);
1361 >        checkCompletedWithWrappedException(h1, ex);
1362 >        checkCompletedWithWrappedException(h2, ex);
1363 >        checkCompletedWithWrappedException(h3, ex);
1364 >        checkCompletedWithWrappedException(h4, ex);
1365 >        checkCompletedWithWrappedException(h5, ex);
1366 >        checkCompletedExceptionally(f, ex);
1367 >        for (Noop r : rs) r.assertNotInvoked();
1368 >    }}
1369  
1370      /**
1371 <     * thenRun result completes exceptionally if action does
1371 >     * thenRun result completes exceptionally if source cancelled
1372       */
1373 <    public void testThenRun3() {
1374 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1375 <        FailingNoop r = new FailingNoop();
1376 <        CompletableFuture<Void> g = f.thenRun(r);
1377 <        f.complete(null);
1378 <        checkCompletedWithWrappedCFException(g);
1379 <    }
1373 >    public void testThenRun_sourceCancelled() {
1374 >        for (ExecutionMode m : ExecutionMode.values())
1375 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1376 >    {
1377 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1378 >        final Noop[] rs = new Noop[6];
1379 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1380 >
1381 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1382 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1383 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1384 >        checkIncomplete(h0);
1385 >        checkIncomplete(h1);
1386 >        checkIncomplete(h2);
1387 >        assertTrue(f.cancel(mayInterruptIfRunning));
1388 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1389 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1390 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1391 >
1392 >        checkCompletedWithWrappedCancellationException(h0);
1393 >        checkCompletedWithWrappedCancellationException(h1);
1394 >        checkCompletedWithWrappedCancellationException(h2);
1395 >        checkCompletedWithWrappedCancellationException(h3);
1396 >        checkCompletedWithWrappedCancellationException(h4);
1397 >        checkCompletedWithWrappedCancellationException(h5);
1398 >        checkCancelled(f);
1399 >        for (Noop r : rs) r.assertNotInvoked();
1400 >    }}
1401  
1402      /**
1403 <     * thenRun result completes exceptionally if source cancelled
1403 >     * thenRun result completes exceptionally if action does
1404       */
1405 <    public void testThenRun4() {
1406 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1407 <        Noop r = new Noop();
1408 <        CompletableFuture<Void> g = f.thenRun(r);
1409 <        assertTrue(f.cancel(true));
1410 <        checkCompletedWithWrappedCancellationException(g);
1411 <    }
1405 >    public void testThenRun_actionFailed() {
1406 >        for (ExecutionMode m : ExecutionMode.values())
1407 >        for (Integer v1 : new Integer[] { 1, null })
1408 >    {
1409 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1410 >        final FailingRunnable[] rs = new FailingRunnable[6];
1411 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
1412 >
1413 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1414 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1415 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1416 >        assertTrue(f.complete(v1));
1417 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1418 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1419 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1420 >
1421 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1422 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1423 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1424 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1425 >        checkCompletedWithWrappedException(h4, rs[4].ex);
1426 >        checkCompletedWithWrappedException(h5, rs[5].ex);
1427 >        checkCompletedNormally(f, v1);
1428 >    }}
1429  
1430      /**
1431       * thenApply result completes normally after normal completion of source
1432       */
1433 <    public void testThenApply() {
1434 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1435 <        CompletableFuture<Integer> g = f.thenApply(inc);
1436 <        f.complete(one);
1437 <        checkCompletedNormally(g, two);
1438 <    }
1433 >    public void testThenApply_normalCompletion() {
1434 >        for (ExecutionMode m : ExecutionMode.values())
1435 >        for (Integer v1 : new Integer[] { 1, null })
1436 >    {
1437 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1438 >        final IncFunction[] rs = new IncFunction[4];
1439 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1440 >
1441 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1442 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1443 >        checkIncomplete(h0);
1444 >        checkIncomplete(h1);
1445 >        assertTrue(f.complete(v1));
1446 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1447 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1448 >
1449 >        checkCompletedNormally(h0, inc(v1));
1450 >        checkCompletedNormally(h1, inc(v1));
1451 >        checkCompletedNormally(h2, inc(v1));
1452 >        checkCompletedNormally(h3, inc(v1));
1453 >        checkCompletedNormally(f, v1);
1454 >        for (IncFunction r : rs) r.assertValue(inc(v1));
1455 >    }}
1456  
1457      /**
1458       * thenApply result completes exceptionally after exceptional
1459       * completion of source
1460       */
1461 <    public void testThenApply2() {
1462 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1463 <        CompletableFuture<Integer> g = f.thenApply(inc);
1464 <        f.completeExceptionally(new CFException());
1465 <        checkCompletedWithWrappedCFException(g);
1466 <    }
1461 >    public void testThenApply_exceptionalCompletion() {
1462 >        for (ExecutionMode m : ExecutionMode.values())
1463 >    {
1464 >        final CFException ex = new CFException();
1465 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1466 >        final IncFunction[] rs = new IncFunction[4];
1467 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1468 >
1469 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1470 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1471 >        assertTrue(f.completeExceptionally(ex));
1472 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1473 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1474 >
1475 >        checkCompletedWithWrappedException(h0, ex);
1476 >        checkCompletedWithWrappedException(h1, ex);
1477 >        checkCompletedWithWrappedException(h2, ex);
1478 >        checkCompletedWithWrappedException(h3, ex);
1479 >        checkCompletedExceptionally(f, ex);
1480 >        for (IncFunction r : rs) r.assertNotInvoked();
1481 >    }}
1482  
1483      /**
1484 <     * thenApply result completes exceptionally if action does
1484 >     * thenApply result completes exceptionally if source cancelled
1485       */
1486 <    public void testThenApply3() {
1487 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1488 <        CompletableFuture<Integer> g = f.thenApply(new FailingFunction());
1489 <        f.complete(one);
1490 <        checkCompletedWithWrappedCFException(g);
1491 <    }
1486 >    public void testThenApply_sourceCancelled() {
1487 >        for (ExecutionMode m : ExecutionMode.values())
1488 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1489 >    {
1490 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1491 >        final IncFunction[] rs = new IncFunction[4];
1492 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1493 >
1494 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1495 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1496 >        assertTrue(f.cancel(mayInterruptIfRunning));
1497 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1498 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1499 >
1500 >        checkCompletedWithWrappedCancellationException(h0);
1501 >        checkCompletedWithWrappedCancellationException(h1);
1502 >        checkCompletedWithWrappedCancellationException(h2);
1503 >        checkCompletedWithWrappedCancellationException(h3);
1504 >        checkCancelled(f);
1505 >        for (IncFunction r : rs) r.assertNotInvoked();
1506 >    }}
1507  
1508      /**
1509 <     * thenApply result completes exceptionally if source cancelled
1509 >     * thenApply result completes exceptionally if action does
1510       */
1511 <    public void testThenApply4() {
1512 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1513 <        CompletableFuture<Integer> g = f.thenApply(inc);
1514 <        assertTrue(f.cancel(true));
1515 <        checkCompletedWithWrappedCancellationException(g);
1516 <    }
1511 >    public void testThenApply_actionFailed() {
1512 >        for (ExecutionMode m : ExecutionMode.values())
1513 >        for (Integer v1 : new Integer[] { 1, null })
1514 >    {
1515 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1516 >        final FailingFunction[] rs = new FailingFunction[4];
1517 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
1518 >
1519 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1520 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1521 >        assertTrue(f.complete(v1));
1522 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1523 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1524 >
1525 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1526 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1527 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1528 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1529 >        checkCompletedNormally(f, v1);
1530 >    }}
1531  
1532      /**
1533       * thenAccept result completes normally after normal completion of source
1534       */
1535 <    public void testThenAccept() {
1536 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1537 <        IncAction r = new IncAction();
1538 <        CompletableFuture<Void> g = f.thenAccept(r);
1539 <        f.complete(one);
1540 <        checkCompletedNormally(g, null);
1541 <        assertEquals(r.value, 2);
1542 <    }
1535 >    public void testThenAccept_normalCompletion() {
1536 >        for (ExecutionMode m : ExecutionMode.values())
1537 >        for (Integer v1 : new Integer[] { 1, null })
1538 >    {
1539 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1540 >        final NoopConsumer[] rs = new NoopConsumer[4];
1541 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1542 >
1543 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1544 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1545 >        checkIncomplete(h0);
1546 >        checkIncomplete(h1);
1547 >        assertTrue(f.complete(v1));
1548 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1549 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1550 >
1551 >        checkCompletedNormally(h0, null);
1552 >        checkCompletedNormally(h1, null);
1553 >        checkCompletedNormally(h2, null);
1554 >        checkCompletedNormally(h3, null);
1555 >        checkCompletedNormally(f, v1);
1556 >        for (NoopConsumer r : rs) r.assertValue(v1);
1557 >    }}
1558  
1559      /**
1560       * thenAccept result completes exceptionally after exceptional
1561       * completion of source
1562       */
1563 <    public void testThenAccept2() {
1564 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1565 <        IncAction r = new IncAction();
1566 <        CompletableFuture<Void> g = f.thenAccept(r);
1567 <        f.completeExceptionally(new CFException());
1568 <        checkCompletedWithWrappedCFException(g);
1569 <    }
1570 <
1571 <    /**
1572 <     * thenAccept result completes exceptionally if action does
1573 <     */
1574 <    public void testThenAccept3() {
1575 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1576 <        FailingConsumer r = new FailingConsumer();
1577 <        CompletableFuture<Void> g = f.thenAccept(r);
1578 <        f.complete(one);
1579 <        checkCompletedWithWrappedCFException(g);
1580 <        assertTrue(r.ran);
1581 <    }
1563 >    public void testThenAccept_exceptionalCompletion() {
1564 >        for (ExecutionMode m : ExecutionMode.values())
1565 >    {
1566 >        final CFException ex = new CFException();
1567 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1568 >        final NoopConsumer[] rs = new NoopConsumer[4];
1569 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1570 >
1571 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1572 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1573 >        assertTrue(f.completeExceptionally(ex));
1574 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1575 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1576 >
1577 >        checkCompletedWithWrappedException(h0, ex);
1578 >        checkCompletedWithWrappedException(h1, ex);
1579 >        checkCompletedWithWrappedException(h2, ex);
1580 >        checkCompletedWithWrappedException(h3, ex);
1581 >        checkCompletedExceptionally(f, ex);
1582 >        for (NoopConsumer r : rs) r.assertNotInvoked();
1583 >    }}
1584  
1585      /**
1586       * thenAccept result completes exceptionally if source cancelled
1587       */
1588 <    public void testThenAccept4() {
1589 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1590 <        IncAction r = new IncAction();
1591 <        CompletableFuture<Void> g = f.thenAccept(r);
1592 <        assertTrue(f.cancel(true));
1593 <        checkCompletedWithWrappedCancellationException(g);
1594 <    }
1595 <
1588 >    public void testThenAccept_sourceCancelled() {
1589 >        for (ExecutionMode m : ExecutionMode.values())
1590 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1591 >    {
1592 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1593 >        final NoopConsumer[] rs = new NoopConsumer[4];
1594 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1595 >
1596 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1597 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1598 >        assertTrue(f.cancel(mayInterruptIfRunning));
1599 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1600 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1601 >
1602 >        checkCompletedWithWrappedCancellationException(h0);
1603 >        checkCompletedWithWrappedCancellationException(h1);
1604 >        checkCompletedWithWrappedCancellationException(h2);
1605 >        checkCompletedWithWrappedCancellationException(h3);
1606 >        checkCancelled(f);
1607 >        for (NoopConsumer r : rs) r.assertNotInvoked();
1608 >    }}
1609  
1610      /**
1611 <     * thenCombine result completes normally after normal completion of sources
1611 >     * thenAccept result completes exceptionally if action does
1612       */
1613 <    public void testThenCombine() {
1614 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1615 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1616 <        CompletableFuture<Integer> g = f.thenCombine(f2, add);
1617 <        f.complete(one);
1618 <        checkIncomplete(g);
1619 <        f2.complete(two);
1620 <        checkCompletedNormally(g, three);
1621 <
1622 <        f = new CompletableFuture<Integer>();
1623 <        f.complete(one);
1624 <        f2 = new CompletableFuture<Integer>();
1625 <        g = f.thenCombine(f2, add);
1626 <        checkIncomplete(g);
1627 <        f2.complete(two);
1628 <        checkCompletedNormally(g, three);
1629 <    }
1613 >    public void testThenAccept_actionFailed() {
1614 >        for (ExecutionMode m : ExecutionMode.values())
1615 >        for (Integer v1 : new Integer[] { 1, null })
1616 >    {
1617 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1618 >        final FailingConsumer[] rs = new FailingConsumer[4];
1619 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
1620 >
1621 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1622 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1623 >        assertTrue(f.complete(v1));
1624 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1625 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1626 >
1627 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1628 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1629 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1630 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1631 >        checkCompletedNormally(f, v1);
1632 >    }}
1633 >
1634 >    /**
1635 >     * thenCombine result completes normally after normal completion
1636 >     * of sources
1637 >     */
1638 >    public void testThenCombine_normalCompletion() {
1639 >        for (ExecutionMode m : ExecutionMode.values())
1640 >        for (boolean fFirst : new boolean[] { true, false })
1641 >        for (Integer v1 : new Integer[] { 1, null })
1642 >        for (Integer v2 : new Integer[] { 2, null })
1643 >    {
1644 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1645 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1646 >        final SubtractFunction[] rs = new SubtractFunction[6];
1647 >        for (int i = 0; i < rs.length; i++) rs[i] = new SubtractFunction(m);
1648 >
1649 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1650 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1651 >        final Integer w1 =  fFirst ? v1 : v2;
1652 >        final Integer w2 = !fFirst ? v1 : v2;
1653 >
1654 >        final CompletableFuture<Integer> h0 = m.thenCombine(f, g, rs[0]);
1655 >        final CompletableFuture<Integer> h1 = m.thenCombine(fst, fst, rs[1]);
1656 >        assertTrue(fst.complete(w1));
1657 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, rs[2]);
1658 >        final CompletableFuture<Integer> h3 = m.thenCombine(fst, fst, rs[3]);
1659 >        checkIncomplete(h0); rs[0].assertNotInvoked();
1660 >        checkIncomplete(h2); rs[2].assertNotInvoked();
1661 >        checkCompletedNormally(h1, subtract(w1, w1));
1662 >        checkCompletedNormally(h3, subtract(w1, w1));
1663 >        rs[1].assertValue(subtract(w1, w1));
1664 >        rs[3].assertValue(subtract(w1, w1));
1665 >        assertTrue(snd.complete(w2));
1666 >        final CompletableFuture<Integer> h4 = m.thenCombine(f, g, rs[4]);
1667 >
1668 >        checkCompletedNormally(h0, subtract(v1, v2));
1669 >        checkCompletedNormally(h2, subtract(v1, v2));
1670 >        checkCompletedNormally(h4, subtract(v1, v2));
1671 >        rs[0].assertValue(subtract(v1, v2));
1672 >        rs[2].assertValue(subtract(v1, v2));
1673 >        rs[4].assertValue(subtract(v1, v2));
1674 >
1675 >        checkCompletedNormally(f, v1);
1676 >        checkCompletedNormally(g, v2);
1677 >    }}
1678  
1679      /**
1680       * thenCombine result completes exceptionally after exceptional
1681       * completion of either source
1682       */
1683 <    public void testThenCombine2() {
1684 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1685 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1686 <        CompletableFuture<Integer> g = f.thenCombine(f2, add);
1687 <        f.completeExceptionally(new CFException());
1688 <        f2.complete(two);
1689 <        checkCompletedWithWrappedCFException(g);
1690 <
1691 <        f = new CompletableFuture<Integer>();
1692 <        f.complete(one);
1693 <        f2 = new CompletableFuture<Integer>();
1694 <        g = f.thenCombine(f2, add);
1695 <        f2.completeExceptionally(new CFException());
1696 <        checkCompletedWithWrappedCFException(g);
1697 <    }
1683 >    public void testThenCombine_exceptionalCompletion() throws Throwable {
1684 >        for (ExecutionMode m : ExecutionMode.values())
1685 >        for (boolean fFirst : new boolean[] { true, false })
1686 >        for (boolean failFirst : new boolean[] { true, false })
1687 >        for (Integer v1 : new Integer[] { 1, null })
1688 >    {
1689 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1690 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1691 >        final CFException ex = new CFException();
1692 >        final SubtractFunction r1 = new SubtractFunction(m);
1693 >        final SubtractFunction r2 = new SubtractFunction(m);
1694 >        final SubtractFunction r3 = new SubtractFunction(m);
1695 >
1696 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1697 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1698 >        final Callable<Boolean> complete1 = failFirst ?
1699 >            () -> fst.completeExceptionally(ex) :
1700 >            () -> fst.complete(v1);
1701 >        final Callable<Boolean> complete2 = failFirst ?
1702 >            () -> snd.complete(v1) :
1703 >            () -> snd.completeExceptionally(ex);
1704 >
1705 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1706 >        assertTrue(complete1.call());
1707 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1708 >        checkIncomplete(h1);
1709 >        checkIncomplete(h2);
1710 >        assertTrue(complete2.call());
1711 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1712 >
1713 >        checkCompletedWithWrappedException(h1, ex);
1714 >        checkCompletedWithWrappedException(h2, ex);
1715 >        checkCompletedWithWrappedException(h3, ex);
1716 >        r1.assertNotInvoked();
1717 >        r2.assertNotInvoked();
1718 >        r3.assertNotInvoked();
1719 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1720 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1721 >    }}
1722  
1723      /**
1724 <     * thenCombine result completes exceptionally if action does
1724 >     * thenCombine result completes exceptionally if either source cancelled
1725       */
1726 <    public void testThenCombine3() {
1727 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1728 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1729 <        FailingBiFunction r = new FailingBiFunction();
1730 <        CompletableFuture<Integer> g = f.thenCombine(f2, r);
1731 <        f.complete(one);
1732 <        checkIncomplete(g);
1733 <        f2.complete(two);
1734 <        checkCompletedWithWrappedCFException(g);
1735 <    }
1726 >    public void testThenCombine_sourceCancelled() throws Throwable {
1727 >        for (ExecutionMode m : ExecutionMode.values())
1728 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1729 >        for (boolean fFirst : new boolean[] { true, false })
1730 >        for (boolean failFirst : new boolean[] { true, false })
1731 >        for (Integer v1 : new Integer[] { 1, null })
1732 >    {
1733 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1734 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1735 >        final SubtractFunction r1 = new SubtractFunction(m);
1736 >        final SubtractFunction r2 = new SubtractFunction(m);
1737 >        final SubtractFunction r3 = new SubtractFunction(m);
1738 >
1739 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1740 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1741 >        final Callable<Boolean> complete1 = failFirst ?
1742 >            () -> fst.cancel(mayInterruptIfRunning) :
1743 >            () -> fst.complete(v1);
1744 >        final Callable<Boolean> complete2 = failFirst ?
1745 >            () -> snd.complete(v1) :
1746 >            () -> snd.cancel(mayInterruptIfRunning);
1747 >
1748 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1749 >        assertTrue(complete1.call());
1750 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1751 >        checkIncomplete(h1);
1752 >        checkIncomplete(h2);
1753 >        assertTrue(complete2.call());
1754 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1755 >
1756 >        checkCompletedWithWrappedCancellationException(h1);
1757 >        checkCompletedWithWrappedCancellationException(h2);
1758 >        checkCompletedWithWrappedCancellationException(h3);
1759 >        r1.assertNotInvoked();
1760 >        r2.assertNotInvoked();
1761 >        r3.assertNotInvoked();
1762 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1763 >        checkCancelled(failFirst ? fst : snd);
1764 >    }}
1765  
1766      /**
1767 <     * thenCombine result completes exceptionally if either source cancelled
1767 >     * thenCombine result completes exceptionally if action does
1768       */
1769 <    public void testThenCombine4() {
1770 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1771 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1772 <        CompletableFuture<Integer> g = f.thenCombine(f2, add);
1773 <        assertTrue(f.cancel(true));
1774 <        f2.complete(two);
1775 <        checkCompletedWithWrappedCancellationException(g);
1776 <        f = new CompletableFuture<Integer>();
1777 <        f2 = new CompletableFuture<Integer>();
1778 <        g = f.thenCombine(f2, add);
1779 <        f.complete(one);
1780 <        assertTrue(f2.cancel(true));
1781 <        checkCompletedWithWrappedCancellationException(g);
1782 <    }
1769 >    public void testThenCombine_actionFailed() {
1770 >        for (ExecutionMode m : ExecutionMode.values())
1771 >        for (boolean fFirst : new boolean[] { true, false })
1772 >        for (Integer v1 : new Integer[] { 1, null })
1773 >        for (Integer v2 : new Integer[] { 2, null })
1774 >    {
1775 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1776 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1777 >        final FailingBiFunction r1 = new FailingBiFunction(m);
1778 >        final FailingBiFunction r2 = new FailingBiFunction(m);
1779 >        final FailingBiFunction r3 = new FailingBiFunction(m);
1780 >
1781 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1782 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1783 >        final Integer w1 =  fFirst ? v1 : v2;
1784 >        final Integer w2 = !fFirst ? v1 : v2;
1785 >
1786 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1787 >        assertTrue(fst.complete(w1));
1788 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1789 >        assertTrue(snd.complete(w2));
1790 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1791 >
1792 >        checkCompletedWithWrappedException(h1, r1.ex);
1793 >        checkCompletedWithWrappedException(h2, r2.ex);
1794 >        checkCompletedWithWrappedException(h3, r3.ex);
1795 >        r1.assertInvoked();
1796 >        r2.assertInvoked();
1797 >        r3.assertInvoked();
1798 >        checkCompletedNormally(f, v1);
1799 >        checkCompletedNormally(g, v2);
1800 >    }}
1801  
1802      /**
1803       * thenAcceptBoth result completes normally after normal
1804       * completion of sources
1805       */
1806 <    public void testThenAcceptBoth() {
1807 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1808 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1809 <        AddAction r = new AddAction();
1810 <        CompletableFuture<Void> g = f.thenAcceptBoth(f2, r);
1811 <        f.complete(one);
1812 <        checkIncomplete(g);
1813 <        f2.complete(two);
1814 <        checkCompletedNormally(g, null);
1815 <        assertEquals(r.value, 3);
1816 <
1817 <        r = new AddAction();
1818 <        f = new CompletableFuture<Integer>();
1819 <        f.complete(one);
1820 <        f2 = new CompletableFuture<Integer>();
1821 <        g = f.thenAcceptBoth(f2, r);
1822 <        checkIncomplete(g);
1823 <        f2.complete(two);
1824 <        checkCompletedNormally(g, null);
1825 <        assertEquals(r.value, 3);
1826 <    }
1806 >    public void testThenAcceptBoth_normalCompletion() {
1807 >        for (ExecutionMode m : ExecutionMode.values())
1808 >        for (boolean fFirst : new boolean[] { true, false })
1809 >        for (Integer v1 : new Integer[] { 1, null })
1810 >        for (Integer v2 : new Integer[] { 2, null })
1811 >    {
1812 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1813 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1814 >        final SubtractAction r1 = new SubtractAction(m);
1815 >        final SubtractAction r2 = new SubtractAction(m);
1816 >        final SubtractAction r3 = new SubtractAction(m);
1817 >
1818 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1819 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1820 >        final Integer w1 =  fFirst ? v1 : v2;
1821 >        final Integer w2 = !fFirst ? v1 : v2;
1822 >
1823 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1824 >        assertTrue(fst.complete(w1));
1825 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1826 >        checkIncomplete(h1);
1827 >        checkIncomplete(h2);
1828 >        r1.assertNotInvoked();
1829 >        r2.assertNotInvoked();
1830 >        assertTrue(snd.complete(w2));
1831 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1832 >
1833 >        checkCompletedNormally(h1, null);
1834 >        checkCompletedNormally(h2, null);
1835 >        checkCompletedNormally(h3, null);
1836 >        r1.assertValue(subtract(v1, v2));
1837 >        r2.assertValue(subtract(v1, v2));
1838 >        r3.assertValue(subtract(v1, v2));
1839 >        checkCompletedNormally(f, v1);
1840 >        checkCompletedNormally(g, v2);
1841 >    }}
1842  
1843      /**
1844       * thenAcceptBoth result completes exceptionally after exceptional
1845       * completion of either source
1846       */
1847 <    public void testThenAcceptBoth2() {
1848 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1849 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1850 <        AddAction r = new AddAction();
1851 <        CompletableFuture<Void> g = f.thenAcceptBoth(f2, r);
1852 <        f.completeExceptionally(new CFException());
1853 <        f2.complete(two);
1854 <        checkCompletedWithWrappedCFException(g);
1855 <
1856 <        r = new AddAction();
1857 <        f = new CompletableFuture<Integer>();
1858 <        f.complete(one);
1859 <        f2 = new CompletableFuture<Integer>();
1860 <        g = f.thenAcceptBoth(f2, r);
1861 <        f2.completeExceptionally(new CFException());
1862 <        checkCompletedWithWrappedCFException(g);
1863 <    }
1847 >    public void testThenAcceptBoth_exceptionalCompletion() throws Throwable {
1848 >        for (ExecutionMode m : ExecutionMode.values())
1849 >        for (boolean fFirst : new boolean[] { true, false })
1850 >        for (boolean failFirst : new boolean[] { true, false })
1851 >        for (Integer v1 : new Integer[] { 1, null })
1852 >    {
1853 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1854 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1855 >        final CFException ex = new CFException();
1856 >        final SubtractAction r1 = new SubtractAction(m);
1857 >        final SubtractAction r2 = new SubtractAction(m);
1858 >        final SubtractAction r3 = new SubtractAction(m);
1859 >
1860 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1861 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1862 >        final Callable<Boolean> complete1 = failFirst ?
1863 >            () -> fst.completeExceptionally(ex) :
1864 >            () -> fst.complete(v1);
1865 >        final Callable<Boolean> complete2 = failFirst ?
1866 >            () -> snd.complete(v1) :
1867 >            () -> snd.completeExceptionally(ex);
1868 >
1869 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1870 >        assertTrue(complete1.call());
1871 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1872 >        checkIncomplete(h1);
1873 >        checkIncomplete(h2);
1874 >        assertTrue(complete2.call());
1875 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1876 >
1877 >        checkCompletedWithWrappedException(h1, ex);
1878 >        checkCompletedWithWrappedException(h2, ex);
1879 >        checkCompletedWithWrappedException(h3, ex);
1880 >        r1.assertNotInvoked();
1881 >        r2.assertNotInvoked();
1882 >        r3.assertNotInvoked();
1883 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1884 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1885 >    }}
1886  
1887      /**
1888 <     * thenAcceptBoth result completes exceptionally if action does
1888 >     * thenAcceptBoth result completes exceptionally if either source cancelled
1889       */
1890 <    public void testThenAcceptBoth3() {
1891 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1892 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1893 <        FailingBiConsumer r = new FailingBiConsumer();
1894 <        CompletableFuture<Void> g = f.thenAcceptBoth(f2, r);
1895 <        f.complete(one);
1896 <        checkIncomplete(g);
1897 <        f2.complete(two);
1898 <        checkCompletedWithWrappedCFException(g);
1899 <    }
1890 >    public void testThenAcceptBoth_sourceCancelled() throws Throwable {
1891 >        for (ExecutionMode m : ExecutionMode.values())
1892 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1893 >        for (boolean fFirst : new boolean[] { true, false })
1894 >        for (boolean failFirst : new boolean[] { true, false })
1895 >        for (Integer v1 : new Integer[] { 1, null })
1896 >    {
1897 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1898 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1899 >        final SubtractAction r1 = new SubtractAction(m);
1900 >        final SubtractAction r2 = new SubtractAction(m);
1901 >        final SubtractAction r3 = new SubtractAction(m);
1902 >
1903 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1904 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1905 >        final Callable<Boolean> complete1 = failFirst ?
1906 >            () -> fst.cancel(mayInterruptIfRunning) :
1907 >            () -> fst.complete(v1);
1908 >        final Callable<Boolean> complete2 = failFirst ?
1909 >            () -> snd.complete(v1) :
1910 >            () -> snd.cancel(mayInterruptIfRunning);
1911 >
1912 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1913 >        assertTrue(complete1.call());
1914 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1915 >        checkIncomplete(h1);
1916 >        checkIncomplete(h2);
1917 >        assertTrue(complete2.call());
1918 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1919 >
1920 >        checkCompletedWithWrappedCancellationException(h1);
1921 >        checkCompletedWithWrappedCancellationException(h2);
1922 >        checkCompletedWithWrappedCancellationException(h3);
1923 >        r1.assertNotInvoked();
1924 >        r2.assertNotInvoked();
1925 >        r3.assertNotInvoked();
1926 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1927 >        checkCancelled(failFirst ? fst : snd);
1928 >    }}
1929  
1930      /**
1931 <     * thenAcceptBoth result completes exceptionally if either source cancelled
1931 >     * thenAcceptBoth result completes exceptionally if action does
1932       */
1933 <    public void testThenAcceptBoth4() {
1934 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1935 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1936 <        AddAction r = new AddAction();
1937 <        CompletableFuture<Void> g = f.thenAcceptBoth(f2, r);
1938 <        assertTrue(f.cancel(true));
1939 <        f2.complete(two);
1940 <        checkCompletedWithWrappedCancellationException(g);
1941 <        f = new CompletableFuture<Integer>();
1942 <        f2 = new CompletableFuture<Integer>();
1943 <        r = new AddAction();
1944 <        g = f.thenAcceptBoth(f2, r);
1945 <        f.complete(one);
1946 <        assertTrue(f2.cancel(true));
1947 <        checkCompletedWithWrappedCancellationException(g);
1948 <    }
1933 >    public void testThenAcceptBoth_actionFailed() {
1934 >        for (ExecutionMode m : ExecutionMode.values())
1935 >        for (boolean fFirst : new boolean[] { true, false })
1936 >        for (Integer v1 : new Integer[] { 1, null })
1937 >        for (Integer v2 : new Integer[] { 2, null })
1938 >    {
1939 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1940 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1941 >        final FailingBiConsumer r1 = new FailingBiConsumer(m);
1942 >        final FailingBiConsumer r2 = new FailingBiConsumer(m);
1943 >        final FailingBiConsumer r3 = new FailingBiConsumer(m);
1944 >
1945 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1946 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1947 >        final Integer w1 =  fFirst ? v1 : v2;
1948 >        final Integer w2 = !fFirst ? v1 : v2;
1949 >
1950 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1951 >        assertTrue(fst.complete(w1));
1952 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1953 >        assertTrue(snd.complete(w2));
1954 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1955 >
1956 >        checkCompletedWithWrappedException(h1, r1.ex);
1957 >        checkCompletedWithWrappedException(h2, r2.ex);
1958 >        checkCompletedWithWrappedException(h3, r3.ex);
1959 >        r1.assertInvoked();
1960 >        r2.assertInvoked();
1961 >        r3.assertInvoked();
1962 >        checkCompletedNormally(f, v1);
1963 >        checkCompletedNormally(g, v2);
1964 >    }}
1965  
1966      /**
1967       * runAfterBoth result completes normally after normal
1968       * completion of sources
1969       */
1970 <    public void testRunAfterBoth() {
1971 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1972 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1973 <        Noop r = new Noop();
1974 <        CompletableFuture<Void> g = f.runAfterBoth(f2, r);
1975 <        f.complete(one);
1976 <        checkIncomplete(g);
1977 <        f2.complete(two);
1978 <        checkCompletedNormally(g, null);
1979 <        assertTrue(r.ran);
1980 <
1981 <        r = new Noop();
1982 <        f = new CompletableFuture<Integer>();
1983 <        f.complete(one);
1984 <        f2 = new CompletableFuture<Integer>();
1985 <        g = f.runAfterBoth(f2, r);
1986 <        checkIncomplete(g);
1987 <        f2.complete(two);
1988 <        checkCompletedNormally(g, null);
1989 <        assertTrue(r.ran);
1990 <    }
1970 >    public void testRunAfterBoth_normalCompletion() {
1971 >        for (ExecutionMode m : ExecutionMode.values())
1972 >        for (boolean fFirst : new boolean[] { true, false })
1973 >        for (Integer v1 : new Integer[] { 1, null })
1974 >        for (Integer v2 : new Integer[] { 2, null })
1975 >    {
1976 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1977 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1978 >        final Noop r1 = new Noop(m);
1979 >        final Noop r2 = new Noop(m);
1980 >        final Noop r3 = new Noop(m);
1981 >
1982 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1983 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1984 >        final Integer w1 =  fFirst ? v1 : v2;
1985 >        final Integer w2 = !fFirst ? v1 : v2;
1986 >
1987 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
1988 >        assertTrue(fst.complete(w1));
1989 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
1990 >        checkIncomplete(h1);
1991 >        checkIncomplete(h2);
1992 >        r1.assertNotInvoked();
1993 >        r2.assertNotInvoked();
1994 >        assertTrue(snd.complete(w2));
1995 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
1996 >
1997 >        checkCompletedNormally(h1, null);
1998 >        checkCompletedNormally(h2, null);
1999 >        checkCompletedNormally(h3, null);
2000 >        r1.assertInvoked();
2001 >        r2.assertInvoked();
2002 >        r3.assertInvoked();
2003 >        checkCompletedNormally(f, v1);
2004 >        checkCompletedNormally(g, v2);
2005 >    }}
2006  
2007      /**
2008       * runAfterBoth result completes exceptionally after exceptional
2009       * completion of either source
2010       */
2011 <    public void testRunAfterBoth2() {
2012 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2013 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2014 <        Noop r = new Noop();
2015 <        CompletableFuture<Void> g = f.runAfterBoth(f2, r);
2016 <        f.completeExceptionally(new CFException());
2017 <        f2.complete(two);
2018 <        checkCompletedWithWrappedCFException(g);
2019 <
2020 <        r = new Noop();
2021 <        f = new CompletableFuture<Integer>();
2022 <        f.complete(one);
2023 <        f2 = new CompletableFuture<Integer>();
2024 <        g = f.runAfterBoth(f2, r);
2025 <        f2.completeExceptionally(new CFException());
2026 <        checkCompletedWithWrappedCFException(g);
2027 <    }
2011 >    public void testRunAfterBoth_exceptionalCompletion() throws Throwable {
2012 >        for (ExecutionMode m : ExecutionMode.values())
2013 >        for (boolean fFirst : new boolean[] { true, false })
2014 >        for (boolean failFirst : new boolean[] { true, false })
2015 >        for (Integer v1 : new Integer[] { 1, null })
2016 >    {
2017 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2018 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2019 >        final CFException ex = new CFException();
2020 >        final Noop r1 = new Noop(m);
2021 >        final Noop r2 = new Noop(m);
2022 >        final Noop r3 = new Noop(m);
2023 >
2024 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2025 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2026 >        final Callable<Boolean> complete1 = failFirst ?
2027 >            () -> fst.completeExceptionally(ex) :
2028 >            () -> fst.complete(v1);
2029 >        final Callable<Boolean> complete2 = failFirst ?
2030 >            () -> snd.complete(v1) :
2031 >            () -> snd.completeExceptionally(ex);
2032 >
2033 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2034 >        assertTrue(complete1.call());
2035 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2036 >        checkIncomplete(h1);
2037 >        checkIncomplete(h2);
2038 >        assertTrue(complete2.call());
2039 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2040 >
2041 >        checkCompletedWithWrappedException(h1, ex);
2042 >        checkCompletedWithWrappedException(h2, ex);
2043 >        checkCompletedWithWrappedException(h3, ex);
2044 >        r1.assertNotInvoked();
2045 >        r2.assertNotInvoked();
2046 >        r3.assertNotInvoked();
2047 >        checkCompletedNormally(failFirst ? snd : fst, v1);
2048 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
2049 >    }}
2050  
2051      /**
2052 <     * runAfterBoth result completes exceptionally if action does
2052 >     * runAfterBoth result completes exceptionally if either source cancelled
2053       */
2054 <    public void testRunAfterBoth3() {
2055 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2056 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2057 <        FailingNoop r = new FailingNoop();
2058 <        CompletableFuture<Void> g = f.runAfterBoth(f2, r);
2059 <        f.complete(one);
2060 <        checkIncomplete(g);
2061 <        f2.complete(two);
2062 <        checkCompletedWithWrappedCFException(g);
2063 <    }
2054 >    public void testRunAfterBoth_sourceCancelled() throws Throwable {
2055 >        for (ExecutionMode m : ExecutionMode.values())
2056 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2057 >        for (boolean fFirst : new boolean[] { true, false })
2058 >        for (boolean failFirst : new boolean[] { true, false })
2059 >        for (Integer v1 : new Integer[] { 1, null })
2060 >    {
2061 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2062 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2063 >        final Noop r1 = new Noop(m);
2064 >        final Noop r2 = new Noop(m);
2065 >        final Noop r3 = new Noop(m);
2066 >
2067 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2068 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2069 >        final Callable<Boolean> complete1 = failFirst ?
2070 >            () -> fst.cancel(mayInterruptIfRunning) :
2071 >            () -> fst.complete(v1);
2072 >        final Callable<Boolean> complete2 = failFirst ?
2073 >            () -> snd.complete(v1) :
2074 >            () -> snd.cancel(mayInterruptIfRunning);
2075 >
2076 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2077 >        assertTrue(complete1.call());
2078 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2079 >        checkIncomplete(h1);
2080 >        checkIncomplete(h2);
2081 >        assertTrue(complete2.call());
2082 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2083 >
2084 >        checkCompletedWithWrappedCancellationException(h1);
2085 >        checkCompletedWithWrappedCancellationException(h2);
2086 >        checkCompletedWithWrappedCancellationException(h3);
2087 >        r1.assertNotInvoked();
2088 >        r2.assertNotInvoked();
2089 >        r3.assertNotInvoked();
2090 >        checkCompletedNormally(failFirst ? snd : fst, v1);
2091 >        checkCancelled(failFirst ? fst : snd);
2092 >    }}
2093  
2094      /**
2095 <     * runAfterBoth result completes exceptionally if either source cancelled
2095 >     * runAfterBoth result completes exceptionally if action does
2096       */
2097 <    public void testRunAfterBoth4() {
2098 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2099 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2100 <        Noop r = new Noop();
2101 <        CompletableFuture<Void> g = f.runAfterBoth(f2, r);
2102 <        assertTrue(f.cancel(true));
2103 <        f2.complete(two);
2104 <        checkCompletedWithWrappedCancellationException(g);
2105 <        f = new CompletableFuture<Integer>();
2106 <        f2 = new CompletableFuture<Integer>();
2107 <        r = new Noop();
2108 <        g = f.runAfterBoth(f2, r);
2109 <        f.complete(one);
2110 <        assertTrue(f2.cancel(true));
2111 <        checkCompletedWithWrappedCancellationException(g);
2112 <    }
2097 >    public void testRunAfterBoth_actionFailed() {
2098 >        for (ExecutionMode m : ExecutionMode.values())
2099 >        for (boolean fFirst : new boolean[] { true, false })
2100 >        for (Integer v1 : new Integer[] { 1, null })
2101 >        for (Integer v2 : new Integer[] { 2, null })
2102 >    {
2103 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2104 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2105 >        final FailingRunnable r1 = new FailingRunnable(m);
2106 >        final FailingRunnable r2 = new FailingRunnable(m);
2107 >        final FailingRunnable r3 = new FailingRunnable(m);
2108 >
2109 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2110 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2111 >        final Integer w1 =  fFirst ? v1 : v2;
2112 >        final Integer w2 = !fFirst ? v1 : v2;
2113 >
2114 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2115 >        assertTrue(fst.complete(w1));
2116 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2117 >        assertTrue(snd.complete(w2));
2118 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2119 >
2120 >        checkCompletedWithWrappedException(h1, r1.ex);
2121 >        checkCompletedWithWrappedException(h2, r2.ex);
2122 >        checkCompletedWithWrappedException(h3, r3.ex);
2123 >        r1.assertInvoked();
2124 >        r2.assertInvoked();
2125 >        r3.assertInvoked();
2126 >        checkCompletedNormally(f, v1);
2127 >        checkCompletedNormally(g, v2);
2128 >    }}
2129  
2130      /**
2131       * applyToEither result completes normally after normal completion
2132       * of either source
2133       */
2134 <    public void testApplyToEither() {
2135 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2136 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2137 <        CompletableFuture<Integer> g = f.applyToEither(f2, inc);
2138 <        f.complete(one);
2139 <        checkCompletedNormally(g, two);
2140 <        f2.complete(one);
2141 <        checkCompletedNormally(g, two);
2142 <
2143 <        f = new CompletableFuture<Integer>();
2144 <        f.complete(one);
2145 <        f2 = new CompletableFuture<Integer>();
2146 <        g = f.applyToEither(f2, inc);
2147 <        checkCompletedNormally(g, two);
2148 <    }
2134 >    public void testApplyToEither_normalCompletion() {
2135 >        for (ExecutionMode m : ExecutionMode.values())
2136 >        for (Integer v1 : new Integer[] { 1, null })
2137 >        for (Integer v2 : new Integer[] { 2, null })
2138 >    {
2139 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2140 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2141 >        final IncFunction[] rs = new IncFunction[6];
2142 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2143 >
2144 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2145 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2146 >        checkIncomplete(h0);
2147 >        checkIncomplete(h1);
2148 >        rs[0].assertNotInvoked();
2149 >        rs[1].assertNotInvoked();
2150 >        f.complete(v1);
2151 >        checkCompletedNormally(h0, inc(v1));
2152 >        checkCompletedNormally(h1, inc(v1));
2153 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2154 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2155 >        checkCompletedNormally(h2, inc(v1));
2156 >        checkCompletedNormally(h3, inc(v1));
2157 >        g.complete(v2);
2158 >
2159 >        // unspecified behavior - both source completions available
2160 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2161 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2162 >        rs[4].assertValue(h4.join());
2163 >        rs[5].assertValue(h5.join());
2164 >        assertTrue(Objects.equals(inc(v1), h4.join()) ||
2165 >                   Objects.equals(inc(v2), h4.join()));
2166 >        assertTrue(Objects.equals(inc(v1), h5.join()) ||
2167 >                   Objects.equals(inc(v2), h5.join()));
2168 >
2169 >        checkCompletedNormally(f, v1);
2170 >        checkCompletedNormally(g, v2);
2171 >        checkCompletedNormally(h0, inc(v1));
2172 >        checkCompletedNormally(h1, inc(v1));
2173 >        checkCompletedNormally(h2, inc(v1));
2174 >        checkCompletedNormally(h3, inc(v1));
2175 >        for (int i = 0; i < 4; i++) rs[i].assertValue(inc(v1));
2176 >    }}
2177  
2178      /**
2179       * applyToEither result completes exceptionally after exceptional
2180       * completion of either source
2181       */
2182 <    public void testApplyToEither2() {
2183 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2184 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2185 <        CompletableFuture<Integer> g = f.applyToEither(f2, inc);
2186 <        f.completeExceptionally(new CFException());
2187 <        f2.complete(one);
2188 <        checkCompletedWithWrappedCFException(g);
2182 >    public void testApplyToEither_exceptionalCompletion() {
2183 >        for (ExecutionMode m : ExecutionMode.values())
2184 >        for (Integer v1 : new Integer[] { 1, null })
2185 >    {
2186 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2187 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2188 >        final CFException ex = new CFException();
2189 >        final IncFunction[] rs = new IncFunction[6];
2190 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2191 >
2192 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2193 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2194 >        checkIncomplete(h0);
2195 >        checkIncomplete(h1);
2196 >        rs[0].assertNotInvoked();
2197 >        rs[1].assertNotInvoked();
2198 >        f.completeExceptionally(ex);
2199 >        checkCompletedWithWrappedException(h0, ex);
2200 >        checkCompletedWithWrappedException(h1, ex);
2201 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2202 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2203 >        checkCompletedWithWrappedException(h2, ex);
2204 >        checkCompletedWithWrappedException(h3, ex);
2205 >        g.complete(v1);
2206 >
2207 >        // unspecified behavior - both source completions available
2208 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2209 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2210 >        try {
2211 >            assertEquals(inc(v1), h4.join());
2212 >            rs[4].assertValue(inc(v1));
2213 >        } catch (CompletionException ok) {
2214 >            checkCompletedWithWrappedException(h4, ex);
2215 >            rs[4].assertNotInvoked();
2216 >        }
2217 >        try {
2218 >            assertEquals(inc(v1), h5.join());
2219 >            rs[5].assertValue(inc(v1));
2220 >        } catch (CompletionException ok) {
2221 >            checkCompletedWithWrappedException(h5, ex);
2222 >            rs[5].assertNotInvoked();
2223 >        }
2224  
2225 <        f = new CompletableFuture<Integer>();
2226 <        f2 = new CompletableFuture<Integer>();
2227 <        f2.completeExceptionally(new CFException());
2228 <        g = f.applyToEither(f2, inc);
2229 <        checkCompletedWithWrappedCFException(g);
2230 <    }
2225 >        checkCompletedExceptionally(f, ex);
2226 >        checkCompletedNormally(g, v1);
2227 >        checkCompletedWithWrappedException(h0, ex);
2228 >        checkCompletedWithWrappedException(h1, ex);
2229 >        checkCompletedWithWrappedException(h2, ex);
2230 >        checkCompletedWithWrappedException(h3, ex);
2231 >        checkCompletedWithWrappedException(h4, ex);
2232 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2233 >    }}
2234 >
2235 >    public void testApplyToEither_exceptionalCompletion2() {
2236 >        for (ExecutionMode m : ExecutionMode.values())
2237 >        for (boolean fFirst : new boolean[] { true, false })
2238 >        for (Integer v1 : new Integer[] { 1, null })
2239 >    {
2240 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2241 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2242 >        final CFException ex = new CFException();
2243 >        final IncFunction[] rs = new IncFunction[6];
2244 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2245 >
2246 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2247 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2248 >        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2249 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2250 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2251 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2252  
2253 <    /**
2254 <     * applyToEither result completes exceptionally if action does
2255 <     */
2256 <    public void testApplyToEither3() {
2257 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2258 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2259 <        FailingFunction r = new FailingFunction();
2260 <        CompletableFuture<Integer> g = f.applyToEither(f2, r);
2261 <        f2.complete(two);
2262 <        checkCompletedWithWrappedCFException(g);
2263 <    }
2253 >        // unspecified behavior - both source completions available
2254 >        try {
2255 >            assertEquals(inc(v1), h0.join());
2256 >            rs[0].assertValue(inc(v1));
2257 >        } catch (CompletionException ok) {
2258 >            checkCompletedWithWrappedException(h0, ex);
2259 >            rs[0].assertNotInvoked();
2260 >        }
2261 >        try {
2262 >            assertEquals(inc(v1), h1.join());
2263 >            rs[1].assertValue(inc(v1));
2264 >        } catch (CompletionException ok) {
2265 >            checkCompletedWithWrappedException(h1, ex);
2266 >            rs[1].assertNotInvoked();
2267 >        }
2268 >        try {
2269 >            assertEquals(inc(v1), h2.join());
2270 >            rs[2].assertValue(inc(v1));
2271 >        } catch (CompletionException ok) {
2272 >            checkCompletedWithWrappedException(h2, ex);
2273 >            rs[2].assertNotInvoked();
2274 >        }
2275 >        try {
2276 >            assertEquals(inc(v1), h3.join());
2277 >            rs[3].assertValue(inc(v1));
2278 >        } catch (CompletionException ok) {
2279 >            checkCompletedWithWrappedException(h3, ex);
2280 >            rs[3].assertNotInvoked();
2281 >        }
2282  
2283 <    /**
2284 <     * applyToEither result completes exceptionally if either source cancelled
2285 <     */
886 <    public void testApplyToEither4() {
887 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
888 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
889 <        CompletableFuture<Integer> g = f.applyToEither(f2, inc);
890 <        assertTrue(f.cancel(true));
891 <        checkCompletedWithWrappedCancellationException(g);
892 <        f = new CompletableFuture<Integer>();
893 <        f2 = new CompletableFuture<Integer>();
894 <        assertTrue(f2.cancel(true));
895 <        checkCompletedWithWrappedCancellationException(g);
896 <    }
2283 >        checkCompletedNormally(f, v1);
2284 >        checkCompletedExceptionally(g, ex);
2285 >    }}
2286  
2287      /**
2288 <     * acceptEither result completes normally after normal completion
900 <     * of either source
2288 >     * applyToEither result completes exceptionally if either source cancelled
2289       */
2290 <    public void testAcceptEither() {
2291 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2292 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2293 <        IncAction r = new IncAction();
2294 <        CompletableFuture<Void> g = f.acceptEither(f2, r);
2295 <        f.complete(one);
2296 <        checkCompletedNormally(g, null);
2297 <        f2.complete(one);
2298 <        checkCompletedNormally(g, null);
2299 <        assertEquals(r.value, 2);
2300 <
2301 <        r = new IncAction();
2302 <        f = new CompletableFuture<Integer>();
2303 <        f.complete(one);
2304 <        f2 = new CompletableFuture<Integer>();
2305 <        g = f.acceptEither(f2, r);
2306 <        checkCompletedNormally(g, null);
2307 <        assertEquals(r.value, 2);
2308 <    }
2290 >    public void testApplyToEither_sourceCancelled() {
2291 >        for (ExecutionMode m : ExecutionMode.values())
2292 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2293 >        for (Integer v1 : new Integer[] { 1, null })
2294 >    {
2295 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2296 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2297 >        final IncFunction[] rs = new IncFunction[6];
2298 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2299 >
2300 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2301 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2302 >        checkIncomplete(h0);
2303 >        checkIncomplete(h1);
2304 >        rs[0].assertNotInvoked();
2305 >        rs[1].assertNotInvoked();
2306 >        f.cancel(mayInterruptIfRunning);
2307 >        checkCompletedWithWrappedCancellationException(h0);
2308 >        checkCompletedWithWrappedCancellationException(h1);
2309 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2310 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2311 >        checkCompletedWithWrappedCancellationException(h2);
2312 >        checkCompletedWithWrappedCancellationException(h3);
2313 >        g.complete(v1);
2314 >
2315 >        // unspecified behavior - both source completions available
2316 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2317 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2318 >        try {
2319 >            assertEquals(inc(v1), h4.join());
2320 >            rs[4].assertValue(inc(v1));
2321 >        } catch (CompletionException ok) {
2322 >            checkCompletedWithWrappedCancellationException(h4);
2323 >            rs[4].assertNotInvoked();
2324 >        }
2325 >        try {
2326 >            assertEquals(inc(v1), h5.join());
2327 >            rs[5].assertValue(inc(v1));
2328 >        } catch (CompletionException ok) {
2329 >            checkCompletedWithWrappedCancellationException(h5);
2330 >            rs[5].assertNotInvoked();
2331 >        }
2332  
2333 <    /**
2334 <     * acceptEither result completes exceptionally after exceptional
2335 <     * completion of either source
2336 <     */
2337 <    public void testAcceptEither2() {
2338 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2339 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2340 <        IncAction r = new IncAction();
2341 <        CompletableFuture<Void> g = f.acceptEither(f2, r);
2342 <        f.completeExceptionally(new CFException());
2343 <        f2.complete(one);
2344 <        checkCompletedWithWrappedCFException(g);
2333 >        checkCancelled(f);
2334 >        checkCompletedNormally(g, v1);
2335 >        checkCompletedWithWrappedCancellationException(h0);
2336 >        checkCompletedWithWrappedCancellationException(h1);
2337 >        checkCompletedWithWrappedCancellationException(h2);
2338 >        checkCompletedWithWrappedCancellationException(h3);
2339 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2340 >    }}
2341 >
2342 >    public void testApplyToEither_sourceCancelled2() {
2343 >        for (ExecutionMode m : ExecutionMode.values())
2344 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2345 >        for (boolean fFirst : new boolean[] { true, false })
2346 >        for (Integer v1 : new Integer[] { 1, null })
2347 >    {
2348 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2349 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2350 >        final IncFunction[] rs = new IncFunction[6];
2351 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2352 >
2353 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2354 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2355 >        assertTrue(fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2356 >        assertTrue(!fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2357 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2358 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2359  
2360 <        r = new IncAction();
2361 <        f = new CompletableFuture<Integer>();
2362 <        f2 = new CompletableFuture<Integer>();
2363 <        f2.completeExceptionally(new CFException());
2364 <        g = f.acceptEither(f2, r);
2365 <        checkCompletedWithWrappedCFException(g);
2366 <    }
2360 >        // unspecified behavior - both source completions available
2361 >        try {
2362 >            assertEquals(inc(v1), h0.join());
2363 >            rs[0].assertValue(inc(v1));
2364 >        } catch (CompletionException ok) {
2365 >            checkCompletedWithWrappedCancellationException(h0);
2366 >            rs[0].assertNotInvoked();
2367 >        }
2368 >        try {
2369 >            assertEquals(inc(v1), h1.join());
2370 >            rs[1].assertValue(inc(v1));
2371 >        } catch (CompletionException ok) {
2372 >            checkCompletedWithWrappedCancellationException(h1);
2373 >            rs[1].assertNotInvoked();
2374 >        }
2375 >        try {
2376 >            assertEquals(inc(v1), h2.join());
2377 >            rs[2].assertValue(inc(v1));
2378 >        } catch (CompletionException ok) {
2379 >            checkCompletedWithWrappedCancellationException(h2);
2380 >            rs[2].assertNotInvoked();
2381 >        }
2382 >        try {
2383 >            assertEquals(inc(v1), h3.join());
2384 >            rs[3].assertValue(inc(v1));
2385 >        } catch (CompletionException ok) {
2386 >            checkCompletedWithWrappedCancellationException(h3);
2387 >            rs[3].assertNotInvoked();
2388 >        }
2389  
2390 <    /**
2391 <     * acceptEither result completes exceptionally if action does
2392 <     */
946 <    public void testAcceptEither3() {
947 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
948 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
949 <        FailingConsumer r = new FailingConsumer();
950 <        CompletableFuture<Void> g = f.acceptEither(f2, r);
951 <        f2.complete(two);
952 <        checkCompletedWithWrappedCFException(g);
953 <    }
2390 >        checkCompletedNormally(f, v1);
2391 >        checkCancelled(g);
2392 >    }}
2393  
2394      /**
2395 <     * acceptEither result completes exceptionally if either source cancelled
2395 >     * applyToEither result completes exceptionally if action does
2396       */
2397 <    public void testAcceptEither4() {
2398 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2399 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2400 <        IncAction r = new IncAction();
2401 <        CompletableFuture<Void> g = f.acceptEither(f2, r);
2402 <        assertTrue(f.cancel(true));
2403 <        checkCompletedWithWrappedCancellationException(g);
2404 <        f = new CompletableFuture<Integer>();
2405 <        f2 = new CompletableFuture<Integer>();
2406 <        assertTrue(f2.cancel(true));
2407 <        checkCompletedWithWrappedCancellationException(g);
2408 <    }
2409 <
2397 >    public void testApplyToEither_actionFailed() {
2398 >        for (ExecutionMode m : ExecutionMode.values())
2399 >        for (Integer v1 : new Integer[] { 1, null })
2400 >        for (Integer v2 : new Integer[] { 2, null })
2401 >    {
2402 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2403 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2404 >        final FailingFunction[] rs = new FailingFunction[6];
2405 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
2406 >
2407 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2408 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2409 >        f.complete(v1);
2410 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2411 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2412 >        checkCompletedWithWrappedException(h0, rs[0].ex);
2413 >        checkCompletedWithWrappedException(h1, rs[1].ex);
2414 >        checkCompletedWithWrappedException(h2, rs[2].ex);
2415 >        checkCompletedWithWrappedException(h3, rs[3].ex);
2416 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2417 >
2418 >        g.complete(v2);
2419 >
2420 >        // unspecified behavior - both source completions available
2421 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2422 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2423 >
2424 >        checkCompletedWithWrappedException(h4, rs[4].ex);
2425 >        assertTrue(Objects.equals(v1, rs[4].value) ||
2426 >                   Objects.equals(v2, rs[4].value));
2427 >        checkCompletedWithWrappedException(h5, rs[5].ex);
2428 >        assertTrue(Objects.equals(v1, rs[5].value) ||
2429 >                   Objects.equals(v2, rs[5].value));
2430 >
2431 >        checkCompletedNormally(f, v1);
2432 >        checkCompletedNormally(g, v2);
2433 >    }}
2434  
2435      /**
2436 <     * runAfterEither result completes normally after normal completion
2436 >     * acceptEither result completes normally after normal completion
2437       * of either source
2438       */
2439 <    public void testRunAfterEither() {
2440 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2441 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2442 <        Noop r = new Noop();
2443 <        CompletableFuture<Void> g = f.runAfterEither(f2, r);
2444 <        f.complete(one);
2445 <        checkCompletedNormally(g, null);
2446 <        f2.complete(one);
2447 <        checkCompletedNormally(g, null);
2448 <        assertTrue(r.ran);
2449 <
2450 <        r = new Noop();
2451 <        f = new CompletableFuture<Integer>();
2452 <        f.complete(one);
2453 <        f2 = new CompletableFuture<Integer>();
2454 <        g = f.runAfterEither(f2, r);
2455 <        checkCompletedNormally(g, null);
2456 <        assertTrue(r.ran);
2457 <    }
2439 >    public void testAcceptEither_normalCompletion() {
2440 >        for (ExecutionMode m : ExecutionMode.values())
2441 >        for (Integer v1 : new Integer[] { 1, null })
2442 >        for (Integer v2 : new Integer[] { 2, null })
2443 >    {
2444 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2445 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2446 >        final NoopConsumer[] rs = new NoopConsumer[6];
2447 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2448 >
2449 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2450 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2451 >        checkIncomplete(h0);
2452 >        checkIncomplete(h1);
2453 >        rs[0].assertNotInvoked();
2454 >        rs[1].assertNotInvoked();
2455 >        f.complete(v1);
2456 >        checkCompletedNormally(h0, null);
2457 >        checkCompletedNormally(h1, null);
2458 >        rs[0].assertValue(v1);
2459 >        rs[1].assertValue(v1);
2460 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2461 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2462 >        checkCompletedNormally(h2, null);
2463 >        checkCompletedNormally(h3, null);
2464 >        rs[2].assertValue(v1);
2465 >        rs[3].assertValue(v1);
2466 >        g.complete(v2);
2467 >
2468 >        // unspecified behavior - both source completions available
2469 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2470 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2471 >        checkCompletedNormally(h4, null);
2472 >        checkCompletedNormally(h5, null);
2473 >        assertTrue(Objects.equals(v1, rs[4].value) ||
2474 >                   Objects.equals(v2, rs[4].value));
2475 >        assertTrue(Objects.equals(v1, rs[5].value) ||
2476 >                   Objects.equals(v2, rs[5].value));
2477 >
2478 >        checkCompletedNormally(f, v1);
2479 >        checkCompletedNormally(g, v2);
2480 >        checkCompletedNormally(h0, null);
2481 >        checkCompletedNormally(h1, null);
2482 >        checkCompletedNormally(h2, null);
2483 >        checkCompletedNormally(h3, null);
2484 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2485 >    }}
2486  
2487      /**
2488 <     * runAfterEither result completes exceptionally after exceptional
2488 >     * acceptEither result completes exceptionally after exceptional
2489       * completion of either source
2490       */
2491 <    public void testRunAfterEither2() {
2492 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2493 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2494 <        Noop r = new Noop();
2495 <        CompletableFuture<Void> g = f.runAfterEither(f2, r);
2496 <        f.completeExceptionally(new CFException());
2497 <        f2.complete(one);
2498 <        checkCompletedWithWrappedCFException(g);
2499 <
2500 <        r = new Noop();
2501 <        f = new CompletableFuture<Integer>();
2502 <        f2 = new CompletableFuture<Integer>();
2503 <        f2.completeExceptionally(new CFException());
2504 <        g = f.runAfterEither(f2, r);
2505 <        checkCompletedWithWrappedCFException(g);
2506 <    }
2491 >    public void testAcceptEither_exceptionalCompletion() {
2492 >        for (ExecutionMode m : ExecutionMode.values())
2493 >        for (Integer v1 : new Integer[] { 1, null })
2494 >    {
2495 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2496 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2497 >        final CFException ex = new CFException();
2498 >        final NoopConsumer[] rs = new NoopConsumer[6];
2499 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2500 >
2501 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2502 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2503 >        checkIncomplete(h0);
2504 >        checkIncomplete(h1);
2505 >        rs[0].assertNotInvoked();
2506 >        rs[1].assertNotInvoked();
2507 >        f.completeExceptionally(ex);
2508 >        checkCompletedWithWrappedException(h0, ex);
2509 >        checkCompletedWithWrappedException(h1, ex);
2510 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2511 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2512 >        checkCompletedWithWrappedException(h2, ex);
2513 >        checkCompletedWithWrappedException(h3, ex);
2514 >
2515 >        g.complete(v1);
2516 >
2517 >        // unspecified behavior - both source completions available
2518 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2519 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2520 >        try {
2521 >            assertNull(h4.join());
2522 >            rs[4].assertValue(v1);
2523 >        } catch (CompletionException ok) {
2524 >            checkCompletedWithWrappedException(h4, ex);
2525 >            rs[4].assertNotInvoked();
2526 >        }
2527 >        try {
2528 >            assertNull(h5.join());
2529 >            rs[5].assertValue(v1);
2530 >        } catch (CompletionException ok) {
2531 >            checkCompletedWithWrappedException(h5, ex);
2532 >            rs[5].assertNotInvoked();
2533 >        }
2534  
2535 <    /**
2536 <     * runAfterEither result completes exceptionally if action does
2537 <     */
2538 <    public void testRunAfterEither3() {
2539 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2540 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2541 <        FailingNoop r = new FailingNoop();
2542 <        CompletableFuture<Void> g = f.runAfterEither(f2, r);
2543 <        f2.complete(two);
2544 <        checkCompletedWithWrappedCFException(g);
2545 <    }
2535 >        checkCompletedExceptionally(f, ex);
2536 >        checkCompletedNormally(g, v1);
2537 >        checkCompletedWithWrappedException(h0, ex);
2538 >        checkCompletedWithWrappedException(h1, ex);
2539 >        checkCompletedWithWrappedException(h2, ex);
2540 >        checkCompletedWithWrappedException(h3, ex);
2541 >        checkCompletedWithWrappedException(h4, ex);
2542 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2543 >    }}
2544 >
2545 >    public void testAcceptEither_exceptionalCompletion2() {
2546 >        for (ExecutionMode m : ExecutionMode.values())
2547 >        for (boolean fFirst : new boolean[] { true, false })
2548 >        for (Integer v1 : new Integer[] { 1, null })
2549 >    {
2550 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2551 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2552 >        final CFException ex = new CFException();
2553 >        final NoopConsumer[] rs = new NoopConsumer[6];
2554 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2555 >
2556 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2557 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2558 >        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2559 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2560 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2561 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2562  
2563 <    /**
2564 <     * runAfterEither result completes exceptionally if either source cancelled
2565 <     */
2566 <    public void testRunAfterEither4() {
2567 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2568 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2569 <        Noop r = new Noop();
2570 <        CompletableFuture<Void> g = f.runAfterEither(f2, r);
2571 <        assertTrue(f.cancel(true));
2572 <        checkCompletedWithWrappedCancellationException(g);
2573 <        f = new CompletableFuture<Integer>();
2574 <        f2 = new CompletableFuture<Integer>();
2575 <        assertTrue(f2.cancel(true));
2576 <        checkCompletedWithWrappedCancellationException(g);
2577 <    }
2563 >        // unspecified behavior - both source completions available
2564 >        try {
2565 >            assertEquals(null, h0.join());
2566 >            rs[0].assertValue(v1);
2567 >        } catch (CompletionException ok) {
2568 >            checkCompletedWithWrappedException(h0, ex);
2569 >            rs[0].assertNotInvoked();
2570 >        }
2571 >        try {
2572 >            assertEquals(null, h1.join());
2573 >            rs[1].assertValue(v1);
2574 >        } catch (CompletionException ok) {
2575 >            checkCompletedWithWrappedException(h1, ex);
2576 >            rs[1].assertNotInvoked();
2577 >        }
2578 >        try {
2579 >            assertEquals(null, h2.join());
2580 >            rs[2].assertValue(v1);
2581 >        } catch (CompletionException ok) {
2582 >            checkCompletedWithWrappedException(h2, ex);
2583 >            rs[2].assertNotInvoked();
2584 >        }
2585 >        try {
2586 >            assertEquals(null, h3.join());
2587 >            rs[3].assertValue(v1);
2588 >        } catch (CompletionException ok) {
2589 >            checkCompletedWithWrappedException(h3, ex);
2590 >            rs[3].assertNotInvoked();
2591 >        }
2592  
2593 <    /**
2594 <     * thenCompose result completes normally after normal completion of source
2595 <     */
1048 <    public void testThenCompose() {
1049 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1050 <        CompletableFutureInc r = new CompletableFutureInc();
1051 <        CompletableFuture<Integer> g = f.thenCompose(r);
1052 <        f.complete(one);
1053 <        checkCompletedNormally(g, two);
1054 <    }
2593 >        checkCompletedNormally(f, v1);
2594 >        checkCompletedExceptionally(g, ex);
2595 >    }}
2596  
2597      /**
2598 <     * thenCompose result completes exceptionally after exceptional
1058 <     * completion of source
2598 >     * acceptEither result completes exceptionally if either source cancelled
2599       */
2600 <    public void testThenCompose2() {
2601 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2602 <        CompletableFutureInc r = new CompletableFutureInc();
2603 <        CompletableFuture<Integer> g = f.thenCompose(r);
2604 <        f.completeExceptionally(new CFException());
2605 <        checkCompletedWithWrappedCFException(g);
2606 <    }
2600 >    public void testAcceptEither_sourceCancelled() {
2601 >        for (ExecutionMode m : ExecutionMode.values())
2602 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2603 >        for (Integer v1 : new Integer[] { 1, null })
2604 >    {
2605 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2606 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2607 >        final NoopConsumer[] rs = new NoopConsumer[6];
2608 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2609 >
2610 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2611 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2612 >        checkIncomplete(h0);
2613 >        checkIncomplete(h1);
2614 >        rs[0].assertNotInvoked();
2615 >        rs[1].assertNotInvoked();
2616 >        f.cancel(mayInterruptIfRunning);
2617 >        checkCompletedWithWrappedCancellationException(h0);
2618 >        checkCompletedWithWrappedCancellationException(h1);
2619 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2620 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2621 >        checkCompletedWithWrappedCancellationException(h2);
2622 >        checkCompletedWithWrappedCancellationException(h3);
2623 >
2624 >        g.complete(v1);
2625 >
2626 >        // unspecified behavior - both source completions available
2627 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2628 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2629 >        try {
2630 >            assertNull(h4.join());
2631 >            rs[4].assertValue(v1);
2632 >        } catch (CompletionException ok) {
2633 >            checkCompletedWithWrappedCancellationException(h4);
2634 >            rs[4].assertNotInvoked();
2635 >        }
2636 >        try {
2637 >            assertNull(h5.join());
2638 >            rs[5].assertValue(v1);
2639 >        } catch (CompletionException ok) {
2640 >            checkCompletedWithWrappedCancellationException(h5);
2641 >            rs[5].assertNotInvoked();
2642 >        }
2643  
2644 <    /**
2645 <     * thenCompose result completes exceptionally if action does
2646 <     */
2647 <    public void testThenCompose3() {
2648 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2649 <        FailingCompletableFutureFunction r = new FailingCompletableFutureFunction();
2650 <        CompletableFuture<Integer> g = f.thenCompose(r);
2651 <        f.complete(one);
1076 <        checkCompletedWithWrappedCFException(g);
1077 <    }
2644 >        checkCancelled(f);
2645 >        checkCompletedNormally(g, v1);
2646 >        checkCompletedWithWrappedCancellationException(h0);
2647 >        checkCompletedWithWrappedCancellationException(h1);
2648 >        checkCompletedWithWrappedCancellationException(h2);
2649 >        checkCompletedWithWrappedCancellationException(h3);
2650 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2651 >    }}
2652  
2653      /**
2654 <     * thenCompose result completes exceptionally if source cancelled
2654 >     * acceptEither result completes exceptionally if action does
2655       */
2656 <    public void testThenCompose4() {
2657 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2658 <        CompletableFutureInc r = new CompletableFutureInc();
2659 <        CompletableFuture<Integer> g = f.thenCompose(r);
2660 <        assertTrue(f.cancel(true));
2661 <        checkCompletedWithWrappedCancellationException(g);
2662 <    }
2663 <
2664 <
2665 <    // asyncs
2656 >    public void testAcceptEither_actionFailed() {
2657 >        for (ExecutionMode m : ExecutionMode.values())
2658 >        for (Integer v1 : new Integer[] { 1, null })
2659 >        for (Integer v2 : new Integer[] { 2, null })
2660 >    {
2661 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2662 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2663 >        final FailingConsumer[] rs = new FailingConsumer[6];
2664 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
2665 >
2666 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2667 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2668 >        f.complete(v1);
2669 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2670 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2671 >        checkCompletedWithWrappedException(h0, rs[0].ex);
2672 >        checkCompletedWithWrappedException(h1, rs[1].ex);
2673 >        checkCompletedWithWrappedException(h2, rs[2].ex);
2674 >        checkCompletedWithWrappedException(h3, rs[3].ex);
2675 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2676 >
2677 >        g.complete(v2);
2678 >
2679 >        // unspecified behavior - both source completions available
2680 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2681 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2682 >
2683 >        checkCompletedWithWrappedException(h4, rs[4].ex);
2684 >        assertTrue(Objects.equals(v1, rs[4].value) ||
2685 >                   Objects.equals(v2, rs[4].value));
2686 >        checkCompletedWithWrappedException(h5, rs[5].ex);
2687 >        assertTrue(Objects.equals(v1, rs[5].value) ||
2688 >                   Objects.equals(v2, rs[5].value));
2689 >
2690 >        checkCompletedNormally(f, v1);
2691 >        checkCompletedNormally(g, v2);
2692 >    }}
2693  
2694      /**
2695 <     * thenRunAsync result completes normally after normal completion of source
2695 >     * runAfterEither result completes normally after normal completion
2696 >     * of either source
2697       */
2698 <    public void testThenRunAsync() {
2699 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2700 <        Noop r = new Noop();
2701 <        CompletableFuture<Void> g = f.thenRunAsync(r);
2702 <        f.complete(null);
2703 <        checkCompletedNormally(g, null);
2704 <
2705 <        // reordered version
2706 <        f = new CompletableFuture<Integer>();
2707 <        f.complete(null);
2708 <        r = new Noop();
2709 <        g = f.thenRunAsync(r);
2710 <        checkCompletedNormally(g, null);
2711 <    }
2698 >    public void testRunAfterEither_normalCompletion() {
2699 >        for (ExecutionMode m : ExecutionMode.values())
2700 >        for (Integer v1 : new Integer[] { 1, null })
2701 >        for (Integer v2 : new Integer[] { 2, null })
2702 >        for (boolean pushNop : new boolean[] { true, false })
2703 >    {
2704 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2705 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2706 >        final Noop[] rs = new Noop[6];
2707 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2708 >
2709 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2710 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2711 >        checkIncomplete(h0);
2712 >        checkIncomplete(h1);
2713 >        rs[0].assertNotInvoked();
2714 >        rs[1].assertNotInvoked();
2715 >        if (pushNop) {          // ad hoc test of intra-completion interference
2716 >            m.thenRun(f, () -> {});
2717 >            m.thenRun(g, () -> {});
2718 >        }
2719 >        f.complete(v1);
2720 >        checkCompletedNormally(h0, null);
2721 >        checkCompletedNormally(h1, null);
2722 >        rs[0].assertInvoked();
2723 >        rs[1].assertInvoked();
2724 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2725 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2726 >        checkCompletedNormally(h2, null);
2727 >        checkCompletedNormally(h3, null);
2728 >        rs[2].assertInvoked();
2729 >        rs[3].assertInvoked();
2730 >
2731 >        g.complete(v2);
2732 >
2733 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2734 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2735 >
2736 >        checkCompletedNormally(f, v1);
2737 >        checkCompletedNormally(g, v2);
2738 >        checkCompletedNormally(h0, null);
2739 >        checkCompletedNormally(h1, null);
2740 >        checkCompletedNormally(h2, null);
2741 >        checkCompletedNormally(h3, null);
2742 >        checkCompletedNormally(h4, null);
2743 >        checkCompletedNormally(h5, null);
2744 >        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2745 >    }}
2746  
2747      /**
2748 <     * thenRunAsync result completes exceptionally after exceptional
2749 <     * completion of source
2748 >     * runAfterEither result completes exceptionally after exceptional
2749 >     * completion of either source
2750       */
2751 <    public void testThenRunAsync2() {
2752 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2753 <        Noop r = new Noop();
2754 <        CompletableFuture<Void> g = f.thenRunAsync(r);
2755 <        f.completeExceptionally(new CFException());
2751 >    public void testRunAfterEither_exceptionalCompletion() {
2752 >        for (ExecutionMode m : ExecutionMode.values())
2753 >        for (Integer v1 : new Integer[] { 1, null })
2754 >    {
2755 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2756 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2757 >        final CFException ex = new CFException();
2758 >        final Noop[] rs = new Noop[6];
2759 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2760 >
2761 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2762 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2763 >        checkIncomplete(h0);
2764 >        checkIncomplete(h1);
2765 >        rs[0].assertNotInvoked();
2766 >        rs[1].assertNotInvoked();
2767 >        assertTrue(f.completeExceptionally(ex));
2768 >        checkCompletedWithWrappedException(h0, ex);
2769 >        checkCompletedWithWrappedException(h1, ex);
2770 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2771 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2772 >        checkCompletedWithWrappedException(h2, ex);
2773 >        checkCompletedWithWrappedException(h3, ex);
2774 >
2775 >        assertTrue(g.complete(v1));
2776 >
2777 >        // unspecified behavior - both source completions available
2778 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2779 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2780          try {
2781 <            g.join();
2782 <            shouldThrow();
2783 <        } catch (Exception ok) {
2781 >            assertNull(h4.join());
2782 >            rs[4].assertInvoked();
2783 >        } catch (CompletionException ok) {
2784 >            checkCompletedWithWrappedException(h4, ex);
2785 >            rs[4].assertNotInvoked();
2786 >        }
2787 >        try {
2788 >            assertNull(h5.join());
2789 >            rs[5].assertInvoked();
2790 >        } catch (CompletionException ok) {
2791 >            checkCompletedWithWrappedException(h5, ex);
2792 >            rs[5].assertNotInvoked();
2793          }
1125        checkCompletedWithWrappedCFException(g);
1126    }
2794  
2795 <    /**
2796 <     * thenRunAsync result completes exceptionally if action does
2797 <     */
2798 <    public void testThenRunAsync3() {
2799 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2800 <        FailingNoop r = new FailingNoop();
2801 <        CompletableFuture<Void> g = f.thenRunAsync(r);
2802 <        f.complete(null);
2803 <        checkCompletedWithWrappedCFException(g);
2804 <    }
2795 >        checkCompletedExceptionally(f, ex);
2796 >        checkCompletedNormally(g, v1);
2797 >        checkCompletedWithWrappedException(h0, ex);
2798 >        checkCompletedWithWrappedException(h1, ex);
2799 >        checkCompletedWithWrappedException(h2, ex);
2800 >        checkCompletedWithWrappedException(h3, ex);
2801 >        checkCompletedWithWrappedException(h4, ex);
2802 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2803 >    }}
2804 >
2805 >    public void testRunAfterEither_exceptionalCompletion2() {
2806 >        for (ExecutionMode m : ExecutionMode.values())
2807 >        for (boolean fFirst : new boolean[] { true, false })
2808 >        for (Integer v1 : new Integer[] { 1, null })
2809 >    {
2810 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2811 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2812 >        final CFException ex = new CFException();
2813 >        final Noop[] rs = new Noop[6];
2814 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2815 >
2816 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2817 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2818 >        assertTrue( fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2819 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2820 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2821 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2822  
2823 <    /**
2824 <     * thenRunAsync result completes exceptionally if source cancelled
2825 <     */
2826 <    public void testThenRunAsync4() {
2827 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2828 <        Noop r = new Noop();
2829 <        CompletableFuture<Void> g = f.thenRunAsync(r);
2830 <        assertTrue(f.cancel(true));
2831 <        checkCompletedWithWrappedCancellationException(g);
2832 <    }
2823 >        // unspecified behavior - both source completions available
2824 >        try {
2825 >            assertEquals(null, h0.join());
2826 >            rs[0].assertInvoked();
2827 >        } catch (CompletionException ok) {
2828 >            checkCompletedWithWrappedException(h0, ex);
2829 >            rs[0].assertNotInvoked();
2830 >        }
2831 >        try {
2832 >            assertEquals(null, h1.join());
2833 >            rs[1].assertInvoked();
2834 >        } catch (CompletionException ok) {
2835 >            checkCompletedWithWrappedException(h1, ex);
2836 >            rs[1].assertNotInvoked();
2837 >        }
2838 >        try {
2839 >            assertEquals(null, h2.join());
2840 >            rs[2].assertInvoked();
2841 >        } catch (CompletionException ok) {
2842 >            checkCompletedWithWrappedException(h2, ex);
2843 >            rs[2].assertNotInvoked();
2844 >        }
2845 >        try {
2846 >            assertEquals(null, h3.join());
2847 >            rs[3].assertInvoked();
2848 >        } catch (CompletionException ok) {
2849 >            checkCompletedWithWrappedException(h3, ex);
2850 >            rs[3].assertNotInvoked();
2851 >        }
2852  
2853 <    /**
2854 <     * thenApplyAsync result completes normally after normal completion of source
2855 <     */
1153 <    public void testThenApplyAsync() {
1154 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1155 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
1156 <        f.complete(one);
1157 <        checkCompletedNormally(g, two);
1158 <    }
2853 >        checkCompletedNormally(f, v1);
2854 >        checkCompletedExceptionally(g, ex);
2855 >    }}
2856  
2857      /**
2858 <     * thenApplyAsync result completes exceptionally after exceptional
1162 <     * completion of source
2858 >     * runAfterEither result completes exceptionally if either source cancelled
2859       */
2860 <    public void testThenApplyAsync2() {
2861 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2862 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
2863 <        f.completeExceptionally(new CFException());
2864 <        checkCompletedWithWrappedCFException(g);
2865 <    }
2860 >    public void testRunAfterEither_sourceCancelled() {
2861 >        for (ExecutionMode m : ExecutionMode.values())
2862 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2863 >        for (Integer v1 : new Integer[] { 1, null })
2864 >    {
2865 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2866 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2867 >        final Noop[] rs = new Noop[6];
2868 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2869 >
2870 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2871 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2872 >        checkIncomplete(h0);
2873 >        checkIncomplete(h1);
2874 >        rs[0].assertNotInvoked();
2875 >        rs[1].assertNotInvoked();
2876 >        f.cancel(mayInterruptIfRunning);
2877 >        checkCompletedWithWrappedCancellationException(h0);
2878 >        checkCompletedWithWrappedCancellationException(h1);
2879 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2880 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2881 >        checkCompletedWithWrappedCancellationException(h2);
2882 >        checkCompletedWithWrappedCancellationException(h3);
2883 >
2884 >        assertTrue(g.complete(v1));
2885 >
2886 >        // unspecified behavior - both source completions available
2887 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2888 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2889 >        try {
2890 >            assertNull(h4.join());
2891 >            rs[4].assertInvoked();
2892 >        } catch (CompletionException ok) {
2893 >            checkCompletedWithWrappedCancellationException(h4);
2894 >            rs[4].assertNotInvoked();
2895 >        }
2896 >        try {
2897 >            assertNull(h5.join());
2898 >            rs[5].assertInvoked();
2899 >        } catch (CompletionException ok) {
2900 >            checkCompletedWithWrappedCancellationException(h5);
2901 >            rs[5].assertNotInvoked();
2902 >        }
2903  
2904 <    /**
2905 <     * thenApplyAsync result completes exceptionally if action does
2906 <     */
2907 <    public void testThenApplyAsync3() {
2908 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2909 <        FailingFunction r = new FailingFunction();
2910 <        CompletableFuture<Integer> g = f.thenApplyAsync(r);
2911 <        f.complete(null);
1179 <        checkCompletedWithWrappedCFException(g);
1180 <    }
2904 >        checkCancelled(f);
2905 >        checkCompletedNormally(g, v1);
2906 >        checkCompletedWithWrappedCancellationException(h0);
2907 >        checkCompletedWithWrappedCancellationException(h1);
2908 >        checkCompletedWithWrappedCancellationException(h2);
2909 >        checkCompletedWithWrappedCancellationException(h3);
2910 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2911 >    }}
2912  
2913      /**
2914 <     * thenApplyAsync result completes exceptionally if source cancelled
2914 >     * runAfterEither result completes exceptionally if action does
2915       */
2916 <    public void testThenApplyAsync4() {
2917 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2918 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
2919 <        assertTrue(f.cancel(true));
2920 <        checkCompletedWithWrappedCancellationException(g);
2921 <    }
2916 >    public void testRunAfterEither_actionFailed() {
2917 >        for (ExecutionMode m : ExecutionMode.values())
2918 >        for (Integer v1 : new Integer[] { 1, null })
2919 >        for (Integer v2 : new Integer[] { 2, null })
2920 >    {
2921 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2922 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2923 >        final FailingRunnable[] rs = new FailingRunnable[6];
2924 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
2925 >
2926 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2927 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2928 >        assertTrue(f.complete(v1));
2929 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2930 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2931 >        checkCompletedWithWrappedException(h0, rs[0].ex);
2932 >        checkCompletedWithWrappedException(h1, rs[1].ex);
2933 >        checkCompletedWithWrappedException(h2, rs[2].ex);
2934 >        checkCompletedWithWrappedException(h3, rs[3].ex);
2935 >        for (int i = 0; i < 4; i++) rs[i].assertInvoked();
2936 >        assertTrue(g.complete(v2));
2937 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2938 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2939 >        checkCompletedWithWrappedException(h4, rs[4].ex);
2940 >        checkCompletedWithWrappedException(h5, rs[5].ex);
2941 >
2942 >        checkCompletedNormally(f, v1);
2943 >        checkCompletedNormally(g, v2);
2944 >        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2945 >    }}
2946  
2947      /**
2948 <     * thenAcceptAsync result completes normally after normal
1194 <     * completion of source
2948 >     * thenCompose result completes normally after normal completion of source
2949       */
2950 <    public void testThenAcceptAsync() {
2951 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2952 <        IncAction r = new IncAction();
2953 <        CompletableFuture<Void> g = f.thenAcceptAsync(r);
2954 <        f.complete(one);
2955 <        checkCompletedNormally(g, null);
2956 <        assertEquals(r.value, 2);
2957 <    }
2950 >    public void testThenCompose_normalCompletion() {
2951 >        for (ExecutionMode m : ExecutionMode.values())
2952 >        for (boolean createIncomplete : new boolean[] { true, false })
2953 >        for (Integer v1 : new Integer[] { 1, null })
2954 >    {
2955 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2956 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2957 >        if (!createIncomplete) assertTrue(f.complete(v1));
2958 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2959 >        if (createIncomplete) assertTrue(f.complete(v1));
2960 >
2961 >        checkCompletedNormally(g, inc(v1));
2962 >        checkCompletedNormally(f, v1);
2963 >        r.assertValue(v1);
2964 >    }}
2965  
2966      /**
2967 <     * thenAcceptAsync result completes exceptionally after exceptional
2967 >     * thenCompose result completes exceptionally after exceptional
2968       * completion of source
2969       */
2970 <    public void testThenAcceptAsync2() {
2971 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2972 <        IncAction r = new IncAction();
2973 <        CompletableFuture<Void> g = f.thenAcceptAsync(r);
2974 <        f.completeExceptionally(new CFException());
2975 <        checkCompletedWithWrappedCFException(g);
2976 <    }
2977 <
2978 <    /**
2979 <     * thenAcceptAsync result completes exceptionally if action does
2980 <     */
2981 <    public void testThenAcceptAsync3() {
2982 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2983 <        FailingConsumer r = new FailingConsumer();
2984 <        CompletableFuture<Void> g = f.thenAcceptAsync(r);
1224 <        f.complete(null);
1225 <        checkCompletedWithWrappedCFException(g);
1226 <    }
1227 <
1228 <    /**
1229 <     * thenAcceptAsync result completes exceptionally if source cancelled
1230 <     */
1231 <    public void testThenAcceptAsync4() {
1232 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1233 <        IncAction r = new IncAction();
1234 <        CompletableFuture<Void> g = f.thenAcceptAsync(r);
1235 <        assertTrue(f.cancel(true));
1236 <        checkCompletedWithWrappedCancellationException(g);
1237 <    }
1238 <    /**
1239 <     * thenCombineAsync result completes normally after normal
1240 <     * completion of sources
1241 <     */
1242 <    public void testThenCombineAsync() {
1243 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1244 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1245 <        CompletableFuture<Integer> g = f.thenCombineAsync(f2, add);
1246 <        f.complete(one);
1247 <        checkIncomplete(g);
1248 <        f2.complete(two);
1249 <        checkCompletedNormally(g, three);
1250 <    }
2970 >    public void testThenCompose_exceptionalCompletion() {
2971 >        for (ExecutionMode m : ExecutionMode.values())
2972 >        for (boolean createIncomplete : new boolean[] { true, false })
2973 >    {
2974 >        final CFException ex = new CFException();
2975 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2976 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2977 >        if (!createIncomplete) f.completeExceptionally(ex);
2978 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2979 >        if (createIncomplete) f.completeExceptionally(ex);
2980 >
2981 >        checkCompletedWithWrappedException(g, ex);
2982 >        checkCompletedExceptionally(f, ex);
2983 >        r.assertNotInvoked();
2984 >    }}
2985  
2986      /**
2987 <     * thenCombineAsync result completes exceptionally after exceptional
1254 <     * completion of source
2987 >     * thenCompose result completes exceptionally if action does
2988       */
2989 <    public void testThenCombineAsync2() {
2990 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2991 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2992 <        CompletableFuture<Integer> g = f.thenCombineAsync(f2, add);
2993 <        f.completeExceptionally(new CFException());
2994 <        f2.complete(two);
2995 <        checkCompletedWithWrappedCFException(g);
2996 <
2997 <        f = new CompletableFuture<Integer>();
2998 <        f2 = new CompletableFuture<Integer>();
2999 <        g = f.thenCombineAsync(f2, add);
3000 <        f.complete(one);
3001 <        f2.completeExceptionally(new CFException());
3002 <        checkCompletedWithWrappedCFException(g);
3003 <    }
2989 >    public void testThenCompose_actionFailed() {
2990 >        for (ExecutionMode m : ExecutionMode.values())
2991 >        for (boolean createIncomplete : new boolean[] { true, false })
2992 >        for (Integer v1 : new Integer[] { 1, null })
2993 >    {
2994 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2995 >        final FailingCompletableFutureFunction r
2996 >            = new FailingCompletableFutureFunction(m);
2997 >        if (!createIncomplete) assertTrue(f.complete(v1));
2998 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2999 >        if (createIncomplete) assertTrue(f.complete(v1));
3000 >
3001 >        checkCompletedWithWrappedException(g, r.ex);
3002 >        checkCompletedNormally(f, v1);
3003 >    }}
3004  
3005      /**
3006 <     * thenCombineAsync result completes exceptionally if action does
1274 <     */
1275 <    public void testThenCombineAsync3() {
1276 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1277 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1278 <        FailingBiFunction r = new FailingBiFunction();
1279 <        CompletableFuture<Integer> g = f.thenCombineAsync(f2, r);
1280 <        f.complete(one);
1281 <        checkIncomplete(g);
1282 <        f2.complete(two);
1283 <        checkCompletedWithWrappedCFException(g);
1284 <    }
1285 <
1286 <    /**
1287 <     * thenCombineAsync result completes exceptionally if either source cancelled
3006 >     * thenCompose result completes exceptionally if source cancelled
3007       */
3008 <    public void testThenCombineAsync4() {
3009 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3010 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3011 <        CompletableFuture<Integer> g = f.thenCombineAsync(f2, add);
3012 <        assertTrue(f.cancel(true));
3013 <        f2.complete(two);
3014 <        checkCompletedWithWrappedCancellationException(g);
3008 >    public void testThenCompose_sourceCancelled() {
3009 >        for (ExecutionMode m : ExecutionMode.values())
3010 >        for (boolean createIncomplete : new boolean[] { true, false })
3011 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3012 >    {
3013 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
3014 >        final CompletableFutureInc r = new CompletableFutureInc(m);
3015 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
3016 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3017 >        if (createIncomplete) {
3018 >            checkIncomplete(g);
3019 >            assertTrue(f.cancel(mayInterruptIfRunning));
3020 >        }
3021  
1297        f = new CompletableFuture<Integer>();
1298        f2 = new CompletableFuture<Integer>();
1299        g = f.thenCombineAsync(f2, add);
1300        f.complete(one);
1301        assertTrue(f2.cancel(true));
3022          checkCompletedWithWrappedCancellationException(g);
3023 <    }
3024 <
1305 <    /**
1306 <     * thenAcceptBothAsync result completes normally after normal
1307 <     * completion of sources
1308 <     */
1309 <    public void testThenAcceptBothAsync() {
1310 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1311 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1312 <        AddAction r = new AddAction();
1313 <        CompletableFuture<Void> g = f.thenAcceptBothAsync(f2, r);
1314 <        f.complete(one);
1315 <        checkIncomplete(g);
1316 <        f2.complete(two);
1317 <        checkCompletedNormally(g, null);
1318 <        assertEquals(r.value, 3);
1319 <    }
3023 >        checkCancelled(f);
3024 >    }}
3025  
3026      /**
3027 <     * thenAcceptBothAsync result completes exceptionally after exceptional
1323 <     * completion of source
3027 >     * thenCompose result completes exceptionally if the result of the action does
3028       */
3029 <    public void testThenAcceptBothAsync2() {
3030 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3031 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3032 <        AddAction r = new AddAction();
3033 <        CompletableFuture<Void> g = f.thenAcceptBothAsync(f2, r);
3034 <        f.completeExceptionally(new CFException());
3035 <        f2.complete(two);
3036 <        checkCompletedWithWrappedCFException(g);
3029 >    public void testThenCompose_actionReturnsFailingFuture() {
3030 >        for (ExecutionMode m : ExecutionMode.values())
3031 >        for (int order = 0; order < 6; order++)
3032 >        for (Integer v1 : new Integer[] { 1, null })
3033 >    {
3034 >        final CFException ex = new CFException();
3035 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
3036 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
3037 >        final CompletableFuture<Integer> h;
3038 >        // Test all permutations of orders
3039 >        switch (order) {
3040 >        case 0:
3041 >            assertTrue(f.complete(v1));
3042 >            assertTrue(g.completeExceptionally(ex));
3043 >            h = m.thenCompose(f, (x -> g));
3044 >            break;
3045 >        case 1:
3046 >            assertTrue(f.complete(v1));
3047 >            h = m.thenCompose(f, (x -> g));
3048 >            assertTrue(g.completeExceptionally(ex));
3049 >            break;
3050 >        case 2:
3051 >            assertTrue(g.completeExceptionally(ex));
3052 >            assertTrue(f.complete(v1));
3053 >            h = m.thenCompose(f, (x -> g));
3054 >            break;
3055 >        case 3:
3056 >            assertTrue(g.completeExceptionally(ex));
3057 >            h = m.thenCompose(f, (x -> g));
3058 >            assertTrue(f.complete(v1));
3059 >            break;
3060 >        case 4:
3061 >            h = m.thenCompose(f, (x -> g));
3062 >            assertTrue(f.complete(v1));
3063 >            assertTrue(g.completeExceptionally(ex));
3064 >            break;
3065 >        case 5:
3066 >            h = m.thenCompose(f, (x -> g));
3067 >            assertTrue(f.complete(v1));
3068 >            assertTrue(g.completeExceptionally(ex));
3069 >            break;
3070 >        default: throw new AssertionError();
3071 >        }
3072  
3073 <        r = new AddAction();
3074 <        f = new CompletableFuture<Integer>();
3075 <        f2 = new CompletableFuture<Integer>();
3076 <        g = f.thenAcceptBothAsync(f2, r);
1338 <        f.complete(one);
1339 <        f2.completeExceptionally(new CFException());
1340 <        checkCompletedWithWrappedCFException(g);
1341 <    }
3073 >        checkCompletedExceptionally(g, ex);
3074 >        checkCompletedWithWrappedException(h, ex);
3075 >        checkCompletedNormally(f, v1);
3076 >    }}
3077  
3078 <    /**
1344 <     * thenAcceptBothAsync result completes exceptionally if action does
1345 <     */
1346 <    public void testThenAcceptBothAsync3() {
1347 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1348 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1349 <        FailingBiConsumer r = new FailingBiConsumer();
1350 <        CompletableFuture<Void> g = f.thenAcceptBothAsync(f2, r);
1351 <        f.complete(one);
1352 <        checkIncomplete(g);
1353 <        f2.complete(two);
1354 <        checkCompletedWithWrappedCFException(g);
1355 <    }
3078 >    // other static methods
3079  
3080      /**
3081 <     * thenAcceptBothAsync result completes exceptionally if either source cancelled
3081 >     * allOf(no component futures) returns a future completed normally
3082 >     * with the value null
3083       */
3084 <    public void testThenAcceptBothAsync4() {
3085 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3086 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1363 <        AddAction r = new AddAction();
1364 <        CompletableFuture<Void> g = f.thenAcceptBothAsync(f2, r);
1365 <        assertTrue(f.cancel(true));
1366 <        f2.complete(two);
1367 <        checkCompletedWithWrappedCancellationException(g);
1368 <
1369 <        r = new AddAction();
1370 <        f = new CompletableFuture<Integer>();
1371 <        f2 = new CompletableFuture<Integer>();
1372 <        g = f.thenAcceptBothAsync(f2, r);
1373 <        f.complete(one);
1374 <        assertTrue(f2.cancel(true));
1375 <        checkCompletedWithWrappedCancellationException(g);
3084 >    public void testAllOf_empty() throws Exception {
3085 >        CompletableFuture<Void> f = CompletableFuture.allOf();
3086 >        checkCompletedNormally(f, null);
3087      }
3088  
3089      /**
3090 <     * runAfterBothAsync result completes normally after normal
3091 <     * completion of sources
3090 >     * allOf returns a future completed normally with the value null
3091 >     * when all components complete normally
3092       */
3093 <    public void testRunAfterBothAsync() {
3094 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3095 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3096 <        Noop r = new Noop();
3097 <        CompletableFuture<Void> g = f.runAfterBothAsync(f2, r);
3098 <        f.complete(one);
3099 <        checkIncomplete(g);
3100 <        f2.complete(two);
3101 <        checkCompletedNormally(g, null);
3102 <        assertTrue(r.ran);
3093 >    public void testAllOf_normal() throws Exception {
3094 >        for (int k = 1; k < 10; k++) {
3095 >            CompletableFuture<Integer>[] fs
3096 >                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3097 >            for (int i = 0; i < k; i++)
3098 >                fs[i] = new CompletableFuture<>();
3099 >            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3100 >            for (int i = 0; i < k; i++) {
3101 >                checkIncomplete(f);
3102 >                checkIncomplete(CompletableFuture.allOf(fs));
3103 >                fs[i].complete(one);
3104 >            }
3105 >            checkCompletedNormally(f, null);
3106 >            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3107 >        }
3108      }
3109  
3110 <    /**
3111 <     * runAfterBothAsync result completes exceptionally after exceptional
3112 <     * completion of source
3113 <     */
3114 <    public void testRunAfterBothAsync2() {
3115 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3116 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3117 <        Noop r = new Noop();
3118 <        CompletableFuture<Void> g = f.runAfterBothAsync(f2, r);
3119 <        f.completeExceptionally(new CFException());
3120 <        f2.complete(two);
3121 <        checkCompletedWithWrappedCFException(g);
3122 <
3123 <        r = new Noop();
3124 <        f = new CompletableFuture<Integer>();
1409 <        f2 = new CompletableFuture<Integer>();
1410 <        g = f.runAfterBothAsync(f2, r);
1411 <        f.complete(one);
1412 <        f2.completeExceptionally(new CFException());
1413 <        checkCompletedWithWrappedCFException(g);
3110 >    public void testAllOf_normal_backwards() throws Exception {
3111 >        for (int k = 1; k < 10; k++) {
3112 >            CompletableFuture<Integer>[] fs
3113 >                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3114 >            for (int i = 0; i < k; i++)
3115 >                fs[i] = new CompletableFuture<>();
3116 >            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3117 >            for (int i = k - 1; i >= 0; i--) {
3118 >                checkIncomplete(f);
3119 >                checkIncomplete(CompletableFuture.allOf(fs));
3120 >                fs[i].complete(one);
3121 >            }
3122 >            checkCompletedNormally(f, null);
3123 >            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3124 >        }
3125      }
3126  
3127 <    /**
3128 <     * runAfterBothAsync result completes exceptionally if action does
3129 <     */
3130 <    public void testRunAfterBothAsync3() {
3131 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3132 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3133 <        FailingNoop r = new FailingNoop();
3134 <        CompletableFuture<Void> g = f.runAfterBothAsync(f2, r);
3135 <        f.complete(one);
3136 <        checkIncomplete(g);
3137 <        f2.complete(two);
3138 <        checkCompletedWithWrappedCFException(g);
3127 >    public void testAllOf_exceptional() throws Exception {
3128 >        for (int k = 1; k < 10; k++) {
3129 >            CompletableFuture<Integer>[] fs
3130 >                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3131 >            CFException ex = new CFException();
3132 >            for (int i = 0; i < k; i++)
3133 >                fs[i] = new CompletableFuture<>();
3134 >            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3135 >            for (int i = 0; i < k; i++) {
3136 >                checkIncomplete(f);
3137 >                checkIncomplete(CompletableFuture.allOf(fs));
3138 >                if (i != k / 2) {
3139 >                    fs[i].complete(i);
3140 >                    checkCompletedNormally(fs[i], i);
3141 >                } else {
3142 >                    fs[i].completeExceptionally(ex);
3143 >                    checkCompletedExceptionally(fs[i], ex);
3144 >                }
3145 >            }
3146 >            checkCompletedWithWrappedException(f, ex);
3147 >            checkCompletedWithWrappedException(CompletableFuture.allOf(fs), ex);
3148 >        }
3149      }
3150  
3151      /**
3152 <     * runAfterBothAsync result completes exceptionally if either source cancelled
3152 >     * anyOf(no component futures) returns an incomplete future
3153       */
3154 <    public void testRunAfterBothAsync4() {
3155 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3156 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3157 <        Noop r = new Noop();
3158 <        CompletableFuture<Void> g = f.runAfterBothAsync(f2, r);
1438 <        assertTrue(f.cancel(true));
1439 <        f2.complete(two);
1440 <        checkCompletedWithWrappedCancellationException(g);
3154 >    public void testAnyOf_empty() throws Exception {
3155 >        for (Integer v1 : new Integer[] { 1, null })
3156 >    {
3157 >        CompletableFuture<Object> f = CompletableFuture.anyOf();
3158 >        checkIncomplete(f);
3159  
3160 <        r = new Noop();
3161 <        f = new CompletableFuture<Integer>();
3162 <        f2 = new CompletableFuture<Integer>();
1445 <        g = f.runAfterBothAsync(f2, r);
1446 <        f.complete(one);
1447 <        assertTrue(f2.cancel(true));
1448 <        checkCompletedWithWrappedCancellationException(g);
1449 <    }
3160 >        f.complete(v1);
3161 >        checkCompletedNormally(f, v1);
3162 >    }}
3163  
3164      /**
3165 <     * applyToEitherAsync result completes normally after normal
3166 <     * completion of sources
3165 >     * anyOf returns a future completed normally with a value when
3166 >     * a component future does
3167       */
3168 <    public void testApplyToEitherAsync() {
3169 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3170 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3171 <        CompletableFuture<Integer> g = f.applyToEitherAsync(f2, inc);
3172 <        f.complete(one);
3173 <        checkCompletedNormally(g, two);
3174 <
3175 <        f = new CompletableFuture<Integer>();
3176 <        f.complete(one);
3177 <        f2 = new CompletableFuture<Integer>();
3178 <        g = f.applyToEitherAsync(f2, inc);
3179 <        checkCompletedNormally(g, two);
3168 >    public void testAnyOf_normal() throws Exception {
3169 >        for (int k = 0; k < 10; k++) {
3170 >            CompletableFuture[] fs = new CompletableFuture[k];
3171 >            for (int i = 0; i < k; i++)
3172 >                fs[i] = new CompletableFuture<>();
3173 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3174 >            checkIncomplete(f);
3175 >            for (int i = 0; i < k; i++) {
3176 >                fs[i].complete(i);
3177 >                checkCompletedNormally(f, 0);
3178 >                int x = (int) CompletableFuture.anyOf(fs).join();
3179 >                assertTrue(0 <= x && x <= i);
3180 >            }
3181 >        }
3182      }
3183 <
3184 <    /**
3185 <     * applyToEitherAsync result completes exceptionally after exceptional
3186 <     * completion of source
3187 <     */
3188 <    public void testApplyToEitherAsync2() {
3189 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3190 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3191 <        CompletableFuture<Integer> g = f.applyToEitherAsync(f2, inc);
3192 <        f.completeExceptionally(new CFException());
3193 <        checkCompletedWithWrappedCFException(g);
3194 <
3195 <        f = new CompletableFuture<Integer>();
3196 <        f2 = new CompletableFuture<Integer>();
1482 <        f2.completeExceptionally(new CFException());
1483 <        g = f.applyToEitherAsync(f2, inc);
1484 <        f.complete(one);
1485 <        checkCompletedWithWrappedCFException(g);
3183 >    public void testAnyOf_normal_backwards() throws Exception {
3184 >        for (int k = 0; k < 10; k++) {
3185 >            CompletableFuture[] fs = new CompletableFuture[k];
3186 >            for (int i = 0; i < k; i++)
3187 >                fs[i] = new CompletableFuture<>();
3188 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3189 >            checkIncomplete(f);
3190 >            for (int i = k - 1; i >= 0; i--) {
3191 >                fs[i].complete(i);
3192 >                checkCompletedNormally(f, k - 1);
3193 >                int x = (int) CompletableFuture.anyOf(fs).join();
3194 >                assertTrue(i <= x && x <= k - 1);
3195 >            }
3196 >        }
3197      }
3198  
3199      /**
3200 <     * applyToEitherAsync result completes exceptionally if action does
3200 >     * anyOf result completes exceptionally when any component does.
3201       */
3202 <    public void testApplyToEitherAsync3() {
3203 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3204 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3205 <        FailingFunction r = new FailingFunction();
3206 <        CompletableFuture<Integer> g = f.applyToEitherAsync(f2, r);
3207 <        f.complete(one);
3208 <        checkCompletedWithWrappedCFException(g);
3202 >    public void testAnyOf_exceptional() throws Exception {
3203 >        for (int k = 0; k < 10; k++) {
3204 >            CompletableFuture[] fs = new CompletableFuture[k];
3205 >            CFException[] exs = new CFException[k];
3206 >            for (int i = 0; i < k; i++) {
3207 >                fs[i] = new CompletableFuture<>();
3208 >                exs[i] = new CFException();
3209 >            }
3210 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3211 >            checkIncomplete(f);
3212 >            for (int i = 0; i < k; i++) {
3213 >                fs[i].completeExceptionally(exs[i]);
3214 >                checkCompletedWithWrappedException(f, exs[0]);
3215 >                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3216 >            }
3217 >        }
3218      }
3219  
3220 <    /**
3221 <     * applyToEitherAsync result completes exceptionally if either source cancelled
3222 <     */
3223 <    public void testApplyToEitherAsync4() {
3224 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3225 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3226 <        CompletableFuture<Integer> g = f.applyToEitherAsync(f2, inc);
3227 <        assertTrue(f.cancel(true));
3228 <        checkCompletedWithWrappedCancellationException(g);
3229 <
3230 <        f = new CompletableFuture<Integer>();
3231 <        f2 = new CompletableFuture<Integer>();
3232 <        assertTrue(f2.cancel(true));
3233 <        g = f.applyToEitherAsync(f2, inc);
3234 <        checkCompletedWithWrappedCancellationException(g);
3220 >    public void testAnyOf_exceptional_backwards() throws Exception {
3221 >        for (int k = 0; k < 10; k++) {
3222 >            CompletableFuture[] fs = new CompletableFuture[k];
3223 >            CFException[] exs = new CFException[k];
3224 >            for (int i = 0; i < k; i++) {
3225 >                fs[i] = new CompletableFuture<>();
3226 >                exs[i] = new CFException();
3227 >            }
3228 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3229 >            checkIncomplete(f);
3230 >            for (int i = k - 1; i >= 0; i--) {
3231 >                fs[i].completeExceptionally(exs[i]);
3232 >                checkCompletedWithWrappedException(f, exs[k - 1]);
3233 >                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3234 >            }
3235 >        }
3236      }
3237  
3238      /**
3239 <     * acceptEitherAsync result completes normally after normal
1519 <     * completion of sources
3239 >     * Completion methods throw NullPointerException with null arguments
3240       */
3241 <    public void testAcceptEitherAsync() {
3242 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3243 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3244 <        IncAction r = new IncAction();
3245 <        CompletableFuture<Void> g = f.acceptEitherAsync(f2, r);
3246 <        f.complete(one);
3247 <        checkCompletedNormally(g, null);
3248 <        assertEquals(r.value, 2);
3241 >    public void testNPE() {
3242 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3243 >        CompletableFuture<Integer> g = new CompletableFuture<>();
3244 >        CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
3245 >        ThreadExecutor exec = new ThreadExecutor();
3246 >
3247 >        Runnable[] throwingActions = {
3248 >            () -> CompletableFuture.supplyAsync(null),
3249 >            () -> CompletableFuture.supplyAsync(null, exec),
3250 >            () -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.SYNC, 42), null),
3251 >
3252 >            () -> CompletableFuture.runAsync(null),
3253 >            () -> CompletableFuture.runAsync(null, exec),
3254 >            () -> CompletableFuture.runAsync(() -> {}, null),
3255 >
3256 >            () -> f.completeExceptionally(null),
3257 >
3258 >            () -> f.thenApply(null),
3259 >            () -> f.thenApplyAsync(null),
3260 >            () -> f.thenApplyAsync((x) -> x, null),
3261 >            () -> f.thenApplyAsync(null, exec),
3262 >
3263 >            () -> f.thenAccept(null),
3264 >            () -> f.thenAcceptAsync(null),
3265 >            () -> f.thenAcceptAsync((x) -> {} , null),
3266 >            () -> f.thenAcceptAsync(null, exec),
3267 >
3268 >            () -> f.thenRun(null),
3269 >            () -> f.thenRunAsync(null),
3270 >            () -> f.thenRunAsync(() -> {} , null),
3271 >            () -> f.thenRunAsync(null, exec),
3272 >
3273 >            () -> f.thenCombine(g, null),
3274 >            () -> f.thenCombineAsync(g, null),
3275 >            () -> f.thenCombineAsync(g, null, exec),
3276 >            () -> f.thenCombine(nullFuture, (x, y) -> x),
3277 >            () -> f.thenCombineAsync(nullFuture, (x, y) -> x),
3278 >            () -> f.thenCombineAsync(nullFuture, (x, y) -> x, exec),
3279 >            () -> f.thenCombineAsync(g, (x, y) -> x, null),
3280 >
3281 >            () -> f.thenAcceptBoth(g, null),
3282 >            () -> f.thenAcceptBothAsync(g, null),
3283 >            () -> f.thenAcceptBothAsync(g, null, exec),
3284 >            () -> f.thenAcceptBoth(nullFuture, (x, y) -> {}),
3285 >            () -> f.thenAcceptBothAsync(nullFuture, (x, y) -> {}),
3286 >            () -> f.thenAcceptBothAsync(nullFuture, (x, y) -> {}, exec),
3287 >            () -> f.thenAcceptBothAsync(g, (x, y) -> {}, null),
3288 >
3289 >            () -> f.runAfterBoth(g, null),
3290 >            () -> f.runAfterBothAsync(g, null),
3291 >            () -> f.runAfterBothAsync(g, null, exec),
3292 >            () -> f.runAfterBoth(nullFuture, () -> {}),
3293 >            () -> f.runAfterBothAsync(nullFuture, () -> {}),
3294 >            () -> f.runAfterBothAsync(nullFuture, () -> {}, exec),
3295 >            () -> f.runAfterBothAsync(g, () -> {}, null),
3296 >
3297 >            () -> f.applyToEither(g, null),
3298 >            () -> f.applyToEitherAsync(g, null),
3299 >            () -> f.applyToEitherAsync(g, null, exec),
3300 >            () -> f.applyToEither(nullFuture, (x) -> x),
3301 >            () -> f.applyToEitherAsync(nullFuture, (x) -> x),
3302 >            () -> f.applyToEitherAsync(nullFuture, (x) -> x, exec),
3303 >            () -> f.applyToEitherAsync(g, (x) -> x, null),
3304 >
3305 >            () -> f.acceptEither(g, null),
3306 >            () -> f.acceptEitherAsync(g, null),
3307 >            () -> f.acceptEitherAsync(g, null, exec),
3308 >            () -> f.acceptEither(nullFuture, (x) -> {}),
3309 >            () -> f.acceptEitherAsync(nullFuture, (x) -> {}),
3310 >            () -> f.acceptEitherAsync(nullFuture, (x) -> {}, exec),
3311 >            () -> f.acceptEitherAsync(g, (x) -> {}, null),
3312 >
3313 >            () -> f.runAfterEither(g, null),
3314 >            () -> f.runAfterEitherAsync(g, null),
3315 >            () -> f.runAfterEitherAsync(g, null, exec),
3316 >            () -> f.runAfterEither(nullFuture, () -> {}),
3317 >            () -> f.runAfterEitherAsync(nullFuture, () -> {}),
3318 >            () -> f.runAfterEitherAsync(nullFuture, () -> {}, exec),
3319 >            () -> f.runAfterEitherAsync(g, () -> {}, null),
3320 >
3321 >            () -> f.thenCompose(null),
3322 >            () -> f.thenComposeAsync(null),
3323 >            () -> f.thenComposeAsync(new CompletableFutureInc(ExecutionMode.EXECUTOR), null),
3324 >            () -> f.thenComposeAsync(null, exec),
3325 >
3326 >            () -> f.exceptionally(null),
3327 >
3328 >            () -> f.handle(null),
3329 >
3330 >            () -> CompletableFuture.allOf((CompletableFuture<?>)null),
3331 >            () -> CompletableFuture.allOf((CompletableFuture<?>[])null),
3332 >            () -> CompletableFuture.allOf(f, null),
3333 >            () -> CompletableFuture.allOf(null, f),
3334 >
3335 >            () -> CompletableFuture.anyOf((CompletableFuture<?>)null),
3336 >            () -> CompletableFuture.anyOf((CompletableFuture<?>[])null),
3337 >            () -> CompletableFuture.anyOf(f, null),
3338 >            () -> CompletableFuture.anyOf(null, f),
3339 >
3340 >            () -> f.obtrudeException(null),
3341 >
3342 >            () -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3343 >            () -> CompletableFuture.delayedExecutor(1L, null, exec),
3344 >            () -> CompletableFuture.delayedExecutor(1L, null),
3345 >
3346 >            () -> f.orTimeout(1L, null),
3347 >            () -> f.completeOnTimeout(42, 1L, null),
3348 >
3349 >            () -> CompletableFuture.failedFuture(null),
3350 >            () -> CompletableFuture.failedStage(null),
3351 >        };
3352 >
3353 >        assertThrows(NullPointerException.class, throwingActions);
3354 >        assertEquals(0, exec.count.get());
3355 >    }
3356 >
3357 >    /**
3358 >     * Test submissions to an executor that rejects all tasks.
3359 >     */
3360 >    public void testRejectingExecutor() {
3361 >        for (Integer v : new Integer[] { 1, null })
3362 >    {
3363 >        final CountingRejectingExecutor e = new CountingRejectingExecutor();
3364 >
3365 >        final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3366 >        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3367 >
3368 >        List<CompletableFuture<?>> futures = new ArrayList<>();
3369 >
3370 >        List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3371 >        srcs.add(complete);
3372 >        srcs.add(incomplete);
3373 >
3374 >        for (CompletableFuture<Integer> src : srcs) {
3375 >            List<CompletableFuture<?>> fs = new ArrayList<>();
3376 >            fs.add(src.thenRunAsync(() -> {}, e));
3377 >            fs.add(src.thenAcceptAsync((z) -> {}, e));
3378 >            fs.add(src.thenApplyAsync((z) -> z, e));
3379 >
3380 >            fs.add(src.thenCombineAsync(src, (x, y) -> x, e));
3381 >            fs.add(src.thenAcceptBothAsync(src, (x, y) -> {}, e));
3382 >            fs.add(src.runAfterBothAsync(src, () -> {}, e));
3383 >
3384 >            fs.add(src.applyToEitherAsync(src, (z) -> z, e));
3385 >            fs.add(src.acceptEitherAsync(src, (z) -> {}, e));
3386 >            fs.add(src.runAfterEitherAsync(src, () -> {}, e));
3387 >
3388 >            fs.add(src.thenComposeAsync((z) -> null, e));
3389 >            fs.add(src.whenCompleteAsync((z, t) -> {}, e));
3390 >            fs.add(src.handleAsync((z, t) -> null, e));
3391 >
3392 >            for (CompletableFuture<?> future : fs) {
3393 >                if (src.isDone())
3394 >                    checkCompletedWithWrappedException(future, e.ex);
3395 >                else
3396 >                    checkIncomplete(future);
3397 >            }
3398 >            futures.addAll(fs);
3399 >        }
3400  
3401 <        r = new IncAction();
3402 <        f = new CompletableFuture<Integer>();
1532 <        f.complete(one);
1533 <        f2 = new CompletableFuture<Integer>();
1534 <        g = f.acceptEitherAsync(f2, r);
1535 <        checkCompletedNormally(g, null);
1536 <        assertEquals(r.value, 2);
1537 <    }
3401 >        {
3402 >            List<CompletableFuture<?>> fs = new ArrayList<>();
3403  
3404 <    /**
3405 <     * acceptEitherAsync result completes exceptionally after exceptional
1541 <     * completion of source
1542 <     */
1543 <    public void testAcceptEitherAsync2() {
1544 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1545 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1546 <        IncAction r = new IncAction();
1547 <        CompletableFuture<Void> g = f.acceptEitherAsync(f2, r);
1548 <        f.completeExceptionally(new CFException());
1549 <        checkCompletedWithWrappedCFException(g);
3404 >            fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3405 >            fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3406  
3407 <        r = new IncAction();
3408 <        f = new CompletableFuture<Integer>();
1553 <        f2 = new CompletableFuture<Integer>();
1554 <        f2.completeExceptionally(new CFException());
1555 <        g = f.acceptEitherAsync(f2, r);
1556 <        f.complete(one);
1557 <        checkCompletedWithWrappedCFException(g);
1558 <    }
3407 >            fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3408 >            fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3409  
3410 <    /**
3411 <     * acceptEitherAsync result completes exceptionally if action does
1562 <     */
1563 <    public void testAcceptEitherAsync3() {
1564 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1565 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1566 <        FailingConsumer r = new FailingConsumer();
1567 <        CompletableFuture<Void> g = f.acceptEitherAsync(f2, r);
1568 <        f.complete(one);
1569 <        checkCompletedWithWrappedCFException(g);
1570 <    }
3410 >            fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3411 >            fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3412  
3413 <    /**
3414 <     * acceptEitherAsync result completes exceptionally if either
3415 <     * source cancelled
3416 <     */
1576 <    public void testAcceptEitherAsync4() {
1577 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1578 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1579 <        IncAction r = new IncAction();
1580 <        CompletableFuture<Void> g = f.acceptEitherAsync(f2, r);
1581 <        assertTrue(f.cancel(true));
1582 <        checkCompletedWithWrappedCancellationException(g);
3413 >            for (CompletableFuture<?> future : fs)
3414 >                checkIncomplete(future);
3415 >            futures.addAll(fs);
3416 >        }
3417  
3418 <        r = new IncAction();
3419 <        f = new CompletableFuture<Integer>();
1586 <        f2 = new CompletableFuture<Integer>();
1587 <        assertTrue(f2.cancel(true));
1588 <        g = f.acceptEitherAsync(f2, r);
1589 <        checkCompletedWithWrappedCancellationException(g);
1590 <    }
3418 >        {
3419 >            List<CompletableFuture<?>> fs = new ArrayList<>();
3420  
3421 <    /**
3422 <     * runAfterEitherAsync result completes normally after normal
1594 <     * completion of sources
1595 <     */
1596 <    public void testRunAfterEitherAsync() {
1597 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1598 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1599 <        Noop r = new Noop();
1600 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r);
1601 <        f.complete(one);
1602 <        checkCompletedNormally(g, null);
1603 <        assertTrue(r.ran);
3421 >            fs.add(complete.applyToEitherAsync(incomplete, (z) -> z, e));
3422 >            fs.add(incomplete.applyToEitherAsync(complete, (z) -> z, e));
3423  
3424 <        r = new Noop();
3425 <        f = new CompletableFuture<Integer>();
1607 <        f.complete(one);
1608 <        f2 = new CompletableFuture<Integer>();
1609 <        g = f.runAfterEitherAsync(f2, r);
1610 <        checkCompletedNormally(g, null);
1611 <        assertTrue(r.ran);
1612 <    }
3424 >            fs.add(complete.acceptEitherAsync(incomplete, (z) -> {}, e));
3425 >            fs.add(incomplete.acceptEitherAsync(complete, (z) -> {}, e));
3426  
3427 <    /**
3428 <     * runAfterEitherAsync result completes exceptionally after exceptional
1616 <     * completion of source
1617 <     */
1618 <    public void testRunAfterEitherAsync2() {
1619 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1620 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1621 <        Noop r = new Noop();
1622 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r);
1623 <        f.completeExceptionally(new CFException());
1624 <        checkCompletedWithWrappedCFException(g);
3427 >            fs.add(complete.runAfterEitherAsync(incomplete, () -> {}, e));
3428 >            fs.add(incomplete.runAfterEitherAsync(complete, () -> {}, e));
3429  
3430 <        r = new Noop();
3431 <        f = new CompletableFuture<Integer>();
3432 <        f2 = new CompletableFuture<Integer>();
3433 <        f2.completeExceptionally(new CFException());
1630 <        g = f.runAfterEitherAsync(f2, r);
1631 <        f.complete(one);
1632 <        checkCompletedWithWrappedCFException(g);
1633 <    }
3430 >            for (CompletableFuture<?> future : fs)
3431 >                checkCompletedWithWrappedException(future, e.ex);
3432 >            futures.addAll(fs);
3433 >        }
3434  
3435 <    /**
1636 <     * runAfterEitherAsync result completes exceptionally if action does
1637 <     */
1638 <    public void testRunAfterEitherAsync3() {
1639 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1640 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1641 <        FailingNoop r = new FailingNoop();
1642 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r);
1643 <        f.complete(one);
1644 <        checkCompletedWithWrappedCFException(g);
1645 <    }
3435 >        incomplete.complete(v);
3436  
3437 <    /**
3438 <     * runAfterEitherAsync result completes exceptionally if either
1649 <     * source cancelled
1650 <     */
1651 <    public void testRunAfterEitherAsync4() {
1652 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1653 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1654 <        Noop r = new Noop();
1655 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r);
1656 <        assertTrue(f.cancel(true));
1657 <        checkCompletedWithWrappedCancellationException(g);
3437 >        for (CompletableFuture<?> future : futures)
3438 >            checkCompletedWithWrappedException(future, e.ex);
3439  
3440 <        r = new Noop();
3441 <        f = new CompletableFuture<Integer>();
1661 <        f2 = new CompletableFuture<Integer>();
1662 <        assertTrue(f2.cancel(true));
1663 <        g = f.runAfterEitherAsync(f2, r);
1664 <        checkCompletedWithWrappedCancellationException(g);
1665 <    }
3440 >        assertEquals(futures.size(), e.count.get());
3441 >    }}
3442  
3443      /**
3444 <     * thenComposeAsync result completes normally after normal
3445 <     * completion of source
3444 >     * Test submissions to an executor that rejects all tasks, but
3445 >     * should never be invoked because the dependent future is
3446 >     * explicitly completed.
3447       */
3448 <    public void testThenComposeAsync() {
3449 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3450 <        CompletableFutureInc r = new CompletableFutureInc();
3451 <        CompletableFuture<Integer> g = f.thenComposeAsync(r);
1675 <        f.complete(one);
1676 <        checkCompletedNormally(g, two);
1677 <    }
3448 >    public void testRejectingExecutorNeverInvoked() {
3449 >        for (Integer v : new Integer[] { 1, null })
3450 >    {
3451 >        final CountingRejectingExecutor e = new CountingRejectingExecutor();
3452  
3453 <    /**
3454 <     * thenComposeAsync result completes exceptionally after
1681 <     * exceptional completion of source
1682 <     */
1683 <    public void testThenComposeAsync2() {
1684 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1685 <        CompletableFutureInc r = new CompletableFutureInc();
1686 <        CompletableFuture<Integer> g = f.thenComposeAsync(r);
1687 <        f.completeExceptionally(new CFException());
1688 <        checkCompletedWithWrappedCFException(g);
1689 <    }
3453 >        final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3454 >        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3455  
3456 <    /**
1692 <     * thenComposeAsync result completes exceptionally if action does
1693 <     */
1694 <    public void testThenComposeAsync3() {
1695 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1696 <        FailingCompletableFutureFunction r = new FailingCompletableFutureFunction();
1697 <        CompletableFuture<Integer> g = f.thenComposeAsync(r);
1698 <        f.complete(one);
1699 <        checkCompletedWithWrappedCFException(g);
1700 <    }
3456 >        List<CompletableFuture<?>> futures = new ArrayList<>();
3457  
3458 <    /**
3459 <     * thenComposeAsync result completes exceptionally if source cancelled
3460 <     */
1705 <    public void testThenComposeAsync4() {
1706 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1707 <        CompletableFutureInc r = new CompletableFutureInc();
1708 <        CompletableFuture<Integer> g = f.thenComposeAsync(r);
1709 <        assertTrue(f.cancel(true));
1710 <        checkCompletedWithWrappedCancellationException(g);
1711 <    }
3458 >        List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3459 >        srcs.add(complete);
3460 >        srcs.add(incomplete);
3461  
3462 +        List<CompletableFuture<?>> fs = new ArrayList<>();
3463 +        fs.add(incomplete.thenRunAsync(() -> {}, e));
3464 +        fs.add(incomplete.thenAcceptAsync((z) -> {}, e));
3465 +        fs.add(incomplete.thenApplyAsync((z) -> z, e));
3466  
3467 <    // async with explicit executors
3467 >        fs.add(incomplete.thenCombineAsync(incomplete, (x, y) -> x, e));
3468 >        fs.add(incomplete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3469 >        fs.add(incomplete.runAfterBothAsync(incomplete, () -> {}, e));
3470  
3471 <    /**
3472 <     * thenRunAsync result completes normally after normal completion of source
3473 <     */
1719 <    public void testThenRunAsyncE() {
1720 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1721 <        Noop r = new Noop();
1722 <        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
1723 <        f.complete(null);
1724 <        checkCompletedNormally(g, null);
3471 >        fs.add(incomplete.applyToEitherAsync(incomplete, (z) -> z, e));
3472 >        fs.add(incomplete.acceptEitherAsync(incomplete, (z) -> {}, e));
3473 >        fs.add(incomplete.runAfterEitherAsync(incomplete, () -> {}, e));
3474  
3475 <        // reordered version
3476 <        f = new CompletableFuture<Integer>();
3477 <        f.complete(null);
1729 <        r = new Noop();
1730 <        g = f.thenRunAsync(r, new ThreadExecutor());
1731 <        checkCompletedNormally(g, null);
1732 <    }
3475 >        fs.add(incomplete.thenComposeAsync((z) -> null, e));
3476 >        fs.add(incomplete.whenCompleteAsync((z, t) -> {}, e));
3477 >        fs.add(incomplete.handleAsync((z, t) -> null, e));
3478  
3479 <    /**
3480 <     * thenRunAsync result completes exceptionally after exceptional
1736 <     * completion of source
1737 <     */
1738 <    public void testThenRunAsync2E() {
1739 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1740 <        Noop r = new Noop();
1741 <        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
1742 <        f.completeExceptionally(new CFException());
1743 <        try {
1744 <            g.join();
1745 <            shouldThrow();
1746 <        } catch (Exception ok) {
1747 <        }
1748 <        checkCompletedWithWrappedCFException(g);
1749 <    }
3479 >        fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3480 >        fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3481  
3482 <    /**
3483 <     * thenRunAsync result completes exceptionally if action does
1753 <     */
1754 <    public void testThenRunAsync3E() {
1755 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1756 <        FailingNoop r = new FailingNoop();
1757 <        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
1758 <        f.complete(null);
1759 <        checkCompletedWithWrappedCFException(g);
1760 <    }
3482 >        fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3483 >        fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3484  
3485 <    /**
3486 <     * thenRunAsync result completes exceptionally if source cancelled
1764 <     */
1765 <    public void testThenRunAsync4E() {
1766 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1767 <        Noop r = new Noop();
1768 <        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
1769 <        assertTrue(f.cancel(true));
1770 <        checkCompletedWithWrappedCancellationException(g);
1771 <    }
3485 >        fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3486 >        fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3487  
3488 <    /**
3489 <     * thenApplyAsync result completes normally after normal completion of source
1775 <     */
1776 <    public void testThenApplyAsyncE() {
1777 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1778 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
1779 <        f.complete(one);
1780 <        checkCompletedNormally(g, two);
1781 <    }
3488 >        for (CompletableFuture<?> future : fs)
3489 >            checkIncomplete(future);
3490  
3491 <    /**
3492 <     * thenApplyAsync result completes exceptionally after exceptional
1785 <     * completion of source
1786 <     */
1787 <    public void testThenApplyAsync2E() {
1788 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1789 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
1790 <        f.completeExceptionally(new CFException());
1791 <        checkCompletedWithWrappedCFException(g);
1792 <    }
3491 >        for (CompletableFuture<?> future : fs)
3492 >            future.complete(null);
3493  
3494 <    /**
1795 <     * thenApplyAsync result completes exceptionally if action does
1796 <     */
1797 <    public void testThenApplyAsync3E() {
1798 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1799 <        FailingFunction r = new FailingFunction();
1800 <        CompletableFuture<Integer> g = f.thenApplyAsync(r, new ThreadExecutor());
1801 <        f.complete(null);
1802 <        checkCompletedWithWrappedCFException(g);
1803 <    }
3494 >        incomplete.complete(v);
3495  
3496 <    /**
3497 <     * thenApplyAsync result completes exceptionally if source cancelled
1807 <     */
1808 <    public void testThenApplyAsync4E() {
1809 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1810 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
1811 <        assertTrue(f.cancel(true));
1812 <        checkCompletedWithWrappedCancellationException(g);
1813 <    }
3496 >        for (CompletableFuture<?> future : fs)
3497 >            checkCompletedNormally(future, null);
3498  
3499 <    /**
3500 <     * thenAcceptAsync result completes normally after normal
1817 <     * completion of source
1818 <     */
1819 <    public void testThenAcceptAsyncE() {
1820 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1821 <        IncAction r = new IncAction();
1822 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
1823 <        f.complete(one);
1824 <        checkCompletedNormally(g, null);
1825 <        assertEquals(r.value, 2);
1826 <    }
3499 >        assertEquals(0, e.count.get());
3500 >    }}
3501  
3502      /**
3503 <     * thenAcceptAsync result completes exceptionally after exceptional
1830 <     * completion of source
3503 >     * toCompletableFuture returns this CompletableFuture.
3504       */
3505 <    public void testThenAcceptAsync2E() {
3506 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3507 <        IncAction r = new IncAction();
1835 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
1836 <        f.completeExceptionally(new CFException());
1837 <        checkCompletedWithWrappedCFException(g);
3505 >    public void testToCompletableFuture() {
3506 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3507 >        assertSame(f, f.toCompletableFuture());
3508      }
3509  
3510 <    /**
1841 <     * thenAcceptAsync result completes exceptionally if action does
1842 <     */
1843 <    public void testThenAcceptAsync3E() {
1844 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1845 <        FailingConsumer r = new FailingConsumer();
1846 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
1847 <        f.complete(null);
1848 <        checkCompletedWithWrappedCFException(g);
1849 <    }
3510 >    // jdk9
3511  
3512      /**
3513 <     * thenAcceptAsync result completes exceptionally if source cancelled
1853 <     */
1854 <    public void testThenAcceptAsync4E() {
1855 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1856 <        IncAction r = new IncAction();
1857 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
1858 <        assertTrue(f.cancel(true));
1859 <        checkCompletedWithWrappedCancellationException(g);
1860 <    }
1861 <    /**
1862 <     * thenCombineAsync result completes normally after normal
1863 <     * completion of sources
3513 >     * newIncompleteFuture returns an incomplete CompletableFuture
3514       */
3515 <    public void testThenCombineAsyncE() {
3516 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3517 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3518 <        CompletableFuture<Integer> g = f.thenCombineAsync(f2, add, new ThreadExecutor());
3519 <        f.complete(one);
3515 >    public void testNewIncompleteFuture() {
3516 >        for (Integer v1 : new Integer[] { 1, null })
3517 >    {
3518 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3519 >        CompletableFuture<Integer> g = f.newIncompleteFuture();
3520 >        checkIncomplete(f);
3521          checkIncomplete(g);
3522 <        f2.complete(two);
3523 <        checkCompletedNormally(g, three);
1873 <    }
1874 <
1875 <    /**
1876 <     * thenCombineAsync result completes exceptionally after exceptional
1877 <     * completion of source
1878 <     */
1879 <    public void testThenCombineAsync2E() {
1880 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1881 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1882 <        CompletableFuture<Integer> g = f.thenCombineAsync(f2, add, new ThreadExecutor());
1883 <        f.completeExceptionally(new CFException());
1884 <        f2.complete(two);
1885 <        checkCompletedWithWrappedCFException(g);
1886 <
1887 <        f = new CompletableFuture<Integer>();
1888 <        f2 = new CompletableFuture<Integer>();
1889 <        g = f.thenCombineAsync(f2, add, new ThreadExecutor());
1890 <        f.complete(one);
1891 <        f2.completeExceptionally(new CFException());
1892 <        checkCompletedWithWrappedCFException(g);
1893 <    }
1894 <
1895 <    /**
1896 <     * thenCombineAsync result completes exceptionally if action does
1897 <     */
1898 <    public void testThenCombineAsync3E() {
1899 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1900 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1901 <        FailingBiFunction r = new FailingBiFunction();
1902 <        CompletableFuture<Integer> g = f.thenCombineAsync(f2, r, new ThreadExecutor());
1903 <        f.complete(one);
3522 >        f.complete(v1);
3523 >        checkCompletedNormally(f, v1);
3524          checkIncomplete(g);
3525 <        f2.complete(two);
3526 <        checkCompletedWithWrappedCFException(g);
3527 <    }
3525 >        g.complete(v1);
3526 >        checkCompletedNormally(g, v1);
3527 >        assertSame(g.getClass(), CompletableFuture.class);
3528 >    }}
3529  
3530      /**
3531 <     * thenCombineAsync result completes exceptionally if either source cancelled
3531 >     * completedStage returns a completed CompletionStage
3532       */
3533 <    public void testThenCombineAsync4E() {
3534 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3535 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3536 <        CompletableFuture<Integer> g = f.thenCombineAsync(f2, add, new ThreadExecutor());
3537 <        assertTrue(f.cancel(true));
3538 <        f2.complete(two);
3539 <        checkCompletedWithWrappedCancellationException(g);
1919 <
1920 <        f = new CompletableFuture<Integer>();
1921 <        f2 = new CompletableFuture<Integer>();
1922 <        g = f.thenCombineAsync(f2, add, new ThreadExecutor());
1923 <        f.complete(one);
1924 <        assertTrue(f2.cancel(true));
1925 <        checkCompletedWithWrappedCancellationException(g);
3533 >    public void testCompletedStage() {
3534 >        AtomicInteger x = new AtomicInteger(0);
3535 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3536 >        CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3537 >        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3538 >        assertEquals(x.get(), 1);
3539 >        assertNull(r.get());
3540      }
3541  
3542      /**
3543 <     * thenAcceptBothAsync result completes normally after normal
3544 <     * completion of sources
3543 >     * defaultExecutor by default returns the commonPool if
3544 >     * it supports more than one thread.
3545       */
3546 <    public void testThenAcceptBothAsyncE() {
3547 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3548 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3549 <        AddAction r = new AddAction();
3550 <        CompletableFuture<Void> g = f.thenAcceptBothAsync(f2, r, new ThreadExecutor());
3551 <        f.complete(one);
3552 <        checkIncomplete(g);
3553 <        f2.complete(two);
1940 <        checkCompletedNormally(g, null);
1941 <        assertEquals(r.value, 3);
3546 >    public void testDefaultExecutor() {
3547 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3548 >        Executor e = f.defaultExecutor();
3549 >        Executor c = ForkJoinPool.commonPool();
3550 >        if (ForkJoinPool.getCommonPoolParallelism() > 1)
3551 >            assertSame(e, c);
3552 >        else
3553 >            assertNotSame(e, c);
3554      }
3555  
3556      /**
3557 <     * thenAcceptBothAsync result completes exceptionally after exceptional
3558 <     * completion of source
3557 >     * failedFuture returns a CompletableFuture completed
3558 >     * exceptionally with the given Exception
3559       */
3560 <    public void testThenAcceptBothAsync2E() {
3561 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3562 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3563 <        AddAction r = new AddAction();
1952 <        CompletableFuture<Void> g = f.thenAcceptBothAsync(f2, r, new ThreadExecutor());
1953 <        f.completeExceptionally(new CFException());
1954 <        f2.complete(two);
1955 <        checkCompletedWithWrappedCFException(g);
1956 <
1957 <        r = new AddAction();
1958 <        f = new CompletableFuture<Integer>();
1959 <        f2 = new CompletableFuture<Integer>();
1960 <        g = f.thenAcceptBothAsync(f2, r, new ThreadExecutor());
1961 <        f.complete(one);
1962 <        f2.completeExceptionally(new CFException());
1963 <        checkCompletedWithWrappedCFException(g);
3560 >    public void testFailedFuture() {
3561 >        CFException ex = new CFException();
3562 >        CompletableFuture<Integer> f = CompletableFuture.failedFuture(ex);
3563 >        checkCompletedExceptionally(f, ex);
3564      }
3565  
3566      /**
3567 <     * thenAcceptBothAsync result completes exceptionally if action does
1968 <     */
1969 <    public void testThenAcceptBothAsync3E() {
1970 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1971 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1972 <        FailingBiConsumer r = new FailingBiConsumer();
1973 <        CompletableFuture<Void> g = f.thenAcceptBothAsync(f2, r, new ThreadExecutor());
1974 <        f.complete(one);
1975 <        checkIncomplete(g);
1976 <        f2.complete(two);
1977 <        checkCompletedWithWrappedCFException(g);
1978 <    }
1979 <
1980 <    /**
1981 <     * thenAcceptBothAsync result completes exceptionally if either source cancelled
3567 >     * failedFuture(null) throws NPE
3568       */
3569 <    public void testThenAcceptBothAsync4E() {
3570 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3571 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3572 <        AddAction r = new AddAction();
3573 <        CompletableFuture<Void> g = f.thenAcceptBothAsync(f2, r, new ThreadExecutor());
1988 <        assertTrue(f.cancel(true));
1989 <        f2.complete(two);
1990 <        checkCompletedWithWrappedCancellationException(g);
1991 <
1992 <        r = new AddAction();
1993 <        f = new CompletableFuture<Integer>();
1994 <        f2 = new CompletableFuture<Integer>();
1995 <        g = f.thenAcceptBothAsync(f2, r, new ThreadExecutor());
1996 <        f.complete(one);
1997 <        assertTrue(f2.cancel(true));
1998 <        checkCompletedWithWrappedCancellationException(g);
3569 >    public void testFailedFuture_null() {
3570 >        try {
3571 >            CompletableFuture<Integer> f = CompletableFuture.failedFuture(null);
3572 >            shouldThrow();
3573 >        } catch (NullPointerException success) {}
3574      }
3575  
3576      /**
3577 <     * runAfterBothAsync result completes normally after normal
3578 <     * completion of sources
3577 >     * copy returns a CompletableFuture that is completed normally,
3578 >     * with the same value, when source is.
3579       */
3580 <    public void testRunAfterBothAsyncE() {
3581 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3582 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3583 <        Noop r = new Noop();
2009 <        CompletableFuture<Void> g = f.runAfterBothAsync(f2, r, new ThreadExecutor());
2010 <        f.complete(one);
3580 >    public void testCopy() {
3581 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3582 >        CompletableFuture<Integer> g = f.copy();
3583 >        checkIncomplete(f);
3584          checkIncomplete(g);
3585 <        f2.complete(two);
3586 <        checkCompletedNormally(g, null);
3587 <        assertTrue(r.ran);
3585 >        f.complete(1);
3586 >        checkCompletedNormally(f, 1);
3587 >        checkCompletedNormally(g, 1);
3588      }
3589  
3590      /**
3591 <     * runAfterBothAsync result completes exceptionally after exceptional
3592 <     * completion of source
3591 >     * copy returns a CompletableFuture that is completed exceptionally
3592 >     * when source is.
3593       */
3594 <    public void testRunAfterBothAsync2E() {
3595 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3596 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3597 <        Noop r = new Noop();
2025 <        CompletableFuture<Void> g = f.runAfterBothAsync(f2, r, new ThreadExecutor());
2026 <        f.completeExceptionally(new CFException());
2027 <        f2.complete(two);
2028 <        checkCompletedWithWrappedCFException(g);
2029 <
2030 <        r = new Noop();
2031 <        f = new CompletableFuture<Integer>();
2032 <        f2 = new CompletableFuture<Integer>();
2033 <        g = f.runAfterBothAsync(f2, r, new ThreadExecutor());
2034 <        f.complete(one);
2035 <        f2.completeExceptionally(new CFException());
2036 <        checkCompletedWithWrappedCFException(g);
2037 <    }
2038 <
2039 <    /**
2040 <     * runAfterBothAsync result completes exceptionally if action does
2041 <     */
2042 <    public void testRunAfterBothAsync3E() {
2043 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2044 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2045 <        FailingNoop r = new FailingNoop();
2046 <        CompletableFuture<Void> g = f.runAfterBothAsync(f2, r, new ThreadExecutor());
2047 <        f.complete(one);
3594 >    public void testCopy2() {
3595 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3596 >        CompletableFuture<Integer> g = f.copy();
3597 >        checkIncomplete(f);
3598          checkIncomplete(g);
3599 <        f2.complete(two);
3600 <        checkCompletedWithWrappedCFException(g);
3599 >        CFException ex = new CFException();
3600 >        f.completeExceptionally(ex);
3601 >        checkCompletedExceptionally(f, ex);
3602 >        checkCompletedWithWrappedException(g, ex);
3603      }
3604  
3605      /**
3606 <     * runAfterBothAsync result completes exceptionally if either source cancelled
3606 >     * minimalCompletionStage returns a CompletableFuture that is
3607 >     * completed normally, with the same value, when source is.
3608       */
3609 <    public void testRunAfterBothAsync4E() {
3610 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3611 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3612 <        Noop r = new Noop();
3613 <        CompletableFuture<Void> g = f.runAfterBothAsync(f2, r, new ThreadExecutor());
3614 <        assertTrue(f.cancel(true));
3615 <        f2.complete(two);
3616 <        checkCompletedWithWrappedCancellationException(g);
3617 <
3618 <        r = new Noop();
3619 <        f = new CompletableFuture<Integer>();
2067 <        f2 = new CompletableFuture<Integer>();
2068 <        g = f.runAfterBothAsync(f2, r, new ThreadExecutor());
2069 <        f.complete(one);
2070 <        assertTrue(f2.cancel(true));
2071 <        checkCompletedWithWrappedCancellationException(g);
2072 <    }
2073 <
2074 <    /**
2075 <     * applyToEitherAsync result completes normally after normal
2076 <     * completion of sources
2077 <     */
2078 <    public void testApplyToEitherAsyncE() {
2079 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2080 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2081 <        CompletableFuture<Integer> g = f.applyToEitherAsync(f2, inc, new ThreadExecutor());
2082 <        f.complete(one);
2083 <        checkCompletedNormally(g, two);
2084 <
2085 <        f = new CompletableFuture<Integer>();
2086 <        f.complete(one);
2087 <        f2 = new CompletableFuture<Integer>();
2088 <        g = f.applyToEitherAsync(f2, inc, new ThreadExecutor());
2089 <        checkCompletedNormally(g, two);
3609 >    public void testMinimalCompletionStage() {
3610 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3611 >        CompletionStage<Integer> g = f.minimalCompletionStage();
3612 >        AtomicInteger x = new AtomicInteger(0);
3613 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3614 >        checkIncomplete(f);
3615 >        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3616 >        f.complete(1);
3617 >        checkCompletedNormally(f, 1);
3618 >        assertEquals(x.get(), 1);
3619 >        assertNull(r.get());
3620      }
3621  
3622      /**
3623 <     * applyToEitherAsync result completes exceptionally after exceptional
3624 <     * completion of source
3623 >     * minimalCompletionStage returns a CompletableFuture that is
3624 >     * completed exceptionally when source is.
3625       */
3626 <    public void testApplyToEitherAsync2E() {
3627 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3628 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3629 <        CompletableFuture<Integer> g = f.applyToEitherAsync(f2, inc, new ThreadExecutor());
3630 <        f.completeExceptionally(new CFException());
3631 <        checkCompletedWithWrappedCFException(g);
3632 <
3633 <        f = new CompletableFuture<Integer>();
3634 <        f2 = new CompletableFuture<Integer>();
3635 <        f2.completeExceptionally(new CFException());
3636 <        g = f.applyToEitherAsync(f2, inc, new ThreadExecutor());
3637 <        f.complete(one);
2108 <        checkCompletedWithWrappedCFException(g);
3626 >    public void testMinimalCompletionStage2() {
3627 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3628 >        CompletionStage<Integer> g = f.minimalCompletionStage();
3629 >        AtomicInteger x = new AtomicInteger(0);
3630 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3631 >        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3632 >        checkIncomplete(f);
3633 >        CFException ex = new CFException();
3634 >        f.completeExceptionally(ex);
3635 >        checkCompletedExceptionally(f, ex);
3636 >        assertEquals(x.get(), 0);
3637 >        assertEquals(r.get().getCause(), ex);
3638      }
3639  
3640      /**
3641 <     * applyToEitherAsync result completes exceptionally if action does
3641 >     * failedStage returns a CompletionStage completed
3642 >     * exceptionally with the given Exception
3643       */
3644 <    public void testApplyToEitherAsync3E() {
3645 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3646 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3647 <        FailingFunction r = new FailingFunction();
3648 <        CompletableFuture<Integer> g = f.applyToEitherAsync(f2, r, new ThreadExecutor());
3649 <        f.complete(one);
3650 <        checkCompletedWithWrappedCFException(g);
3644 >    public void testFailedStage() {
3645 >        CFException ex = new CFException();
3646 >        CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3647 >        AtomicInteger x = new AtomicInteger(0);
3648 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3649 >        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3650 >        assertEquals(x.get(), 0);
3651 >        assertEquals(r.get(), ex);
3652      }
3653  
3654      /**
3655 <     * applyToEitherAsync result completes exceptionally if either source cancelled
3655 >     * completeAsync completes with value of given supplier
3656       */
3657 <    public void testApplyToEitherAsync4E() {
3658 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3659 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3660 <        CompletableFuture<Integer> g = f.applyToEitherAsync(f2, inc, new ThreadExecutor());
3661 <        assertTrue(f.cancel(true));
3662 <        checkCompletedWithWrappedCancellationException(g);
3663 <
3664 <        f = new CompletableFuture<Integer>();
2134 <        f2 = new CompletableFuture<Integer>();
2135 <        assertTrue(f2.cancel(true));
2136 <        g = f.applyToEitherAsync(f2, inc, new ThreadExecutor());
2137 <        checkCompletedWithWrappedCancellationException(g);
2138 <    }
3657 >    public void testCompleteAsync() {
3658 >        for (Integer v1 : new Integer[] { 1, null })
3659 >    {
3660 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3661 >        f.completeAsync(() -> v1);
3662 >        f.join();
3663 >        checkCompletedNormally(f, v1);
3664 >    }}
3665  
3666      /**
3667 <     * acceptEitherAsync result completes normally after normal
2142 <     * completion of sources
3667 >     * completeAsync completes exceptionally if given supplier throws
3668       */
3669 <    public void testAcceptEitherAsyncE() {
3670 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3671 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3672 <        IncAction r = new IncAction();
3673 <        CompletableFuture<Void> g = f.acceptEitherAsync(f2, r, new ThreadExecutor());
3674 <        f.complete(one);
3675 <        checkCompletedNormally(g, null);
3676 <        assertEquals(r.value, 2);
3677 <
2153 <        r = new IncAction();
2154 <        f = new CompletableFuture<Integer>();
2155 <        f.complete(one);
2156 <        f2 = new CompletableFuture<Integer>();
2157 <        g = f.acceptEitherAsync(f2, r, new ThreadExecutor());
2158 <        checkCompletedNormally(g, null);
2159 <        assertEquals(r.value, 2);
3669 >    public void testCompleteAsync2() {
3670 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3671 >        CFException ex = new CFException();
3672 >        f.completeAsync(() -> {if (true) throw ex; return 1;});
3673 >        try {
3674 >            f.join();
3675 >            shouldThrow();
3676 >        } catch (CompletionException success) {}
3677 >        checkCompletedWithWrappedException(f, ex);
3678      }
3679  
3680      /**
3681 <     * acceptEitherAsync result completes exceptionally after exceptional
2164 <     * completion of source
3681 >     * completeAsync with given executor completes with value of given supplier
3682       */
3683 <    public void testAcceptEitherAsync2E() {
3684 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3685 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3686 <        IncAction r = new IncAction();
3687 <        CompletableFuture<Void> g = f.acceptEitherAsync(f2, r, new ThreadExecutor());
3688 <        f.completeExceptionally(new CFException());
3689 <        checkCompletedWithWrappedCFException(g);
3690 <
3691 <        r = new IncAction();
3692 <        f = new CompletableFuture<Integer>();
2176 <        f2 = new CompletableFuture<Integer>();
2177 <        f2.completeExceptionally(new CFException());
2178 <        g = f.acceptEitherAsync(f2, r, new ThreadExecutor());
2179 <        f.complete(one);
2180 <        checkCompletedWithWrappedCFException(g);
2181 <    }
3683 >    public void testCompleteAsync3() {
3684 >        for (Integer v1 : new Integer[] { 1, null })
3685 >    {
3686 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3687 >        ThreadExecutor executor = new ThreadExecutor();
3688 >        f.completeAsync(() -> v1, executor);
3689 >        assertSame(v1, f.join());
3690 >        checkCompletedNormally(f, v1);
3691 >        assertEquals(1, executor.count.get());
3692 >    }}
3693  
3694      /**
3695 <     * acceptEitherAsync result completes exceptionally if action does
3695 >     * completeAsync with given executor completes exceptionally if
3696 >     * given supplier throws
3697       */
3698 <    public void testAcceptEitherAsync3E() {
3699 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3700 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3701 <        FailingConsumer r = new FailingConsumer();
3702 <        CompletableFuture<Void> g = f.acceptEitherAsync(f2, r, new ThreadExecutor());
3703 <        f.complete(one);
3704 <        checkCompletedWithWrappedCFException(g);
3705 <    }
3698 >    public void testCompleteAsync4() {
3699 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3700 >        CFException ex = new CFException();
3701 >        ThreadExecutor executor = new ThreadExecutor();
3702 >        f.completeAsync(() -> {if (true) throw ex; return 1;}, executor);
3703 >        try {
3704 >            f.join();
3705 >            shouldThrow();
3706 >        } catch (CompletionException success) {}
3707 >        checkCompletedWithWrappedException(f, ex);
3708 >        assertEquals(1, executor.count.get());
3709 >    }
3710 >
3711 >    /**
3712 >     * orTimeout completes with TimeoutException if not complete
3713 >     */
3714 >    public void testOrTimeout_timesOut() {
3715 >        long timeoutMillis = timeoutMillis();
3716 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3717 >        long startTime = System.nanoTime();
3718 >        assertSame(f, f.orTimeout(timeoutMillis, MILLISECONDS));
3719 >        checkCompletedWithTimeoutException(f);
3720 >        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3721 >    }
3722 >
3723 >    /**
3724 >     * orTimeout completes normally if completed before timeout
3725 >     */
3726 >    public void testOrTimeout_completed() {
3727 >        for (Integer v1 : new Integer[] { 1, null })
3728 >    {
3729 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3730 >        CompletableFuture<Integer> g = new CompletableFuture<>();
3731 >        long startTime = System.nanoTime();
3732 >        f.complete(v1);
3733 >        assertSame(f, f.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3734 >        assertSame(g, g.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3735 >        g.complete(v1);
3736 >        checkCompletedNormally(f, v1);
3737 >        checkCompletedNormally(g, v1);
3738 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3739 >    }}
3740 >
3741 >    /**
3742 >     * completeOnTimeout completes with given value if not complete
3743 >     */
3744 >    public void testCompleteOnTimeout_timesOut() {
3745 >        testInParallel(() -> testCompleteOnTimeout_timesOut(42),
3746 >                       () -> testCompleteOnTimeout_timesOut(null));
3747 >    }
3748 >
3749 >    /**
3750 >     * completeOnTimeout completes with given value if not complete
3751 >     */
3752 >    public void testCompleteOnTimeout_timesOut(Integer v) {
3753 >        long timeoutMillis = timeoutMillis();
3754 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3755 >        long startTime = System.nanoTime();
3756 >        assertSame(f, f.completeOnTimeout(v, timeoutMillis, MILLISECONDS));
3757 >        assertSame(v, f.join());
3758 >        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3759 >        f.complete(99);         // should have no effect
3760 >        checkCompletedNormally(f, v);
3761 >    }
3762 >
3763 >    /**
3764 >     * completeOnTimeout has no effect if completed within timeout
3765 >     */
3766 >    public void testCompleteOnTimeout_completed() {
3767 >        for (Integer v1 : new Integer[] { 1, null })
3768 >    {
3769 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3770 >        CompletableFuture<Integer> g = new CompletableFuture<>();
3771 >        long startTime = System.nanoTime();
3772 >        f.complete(v1);
3773 >        assertSame(f, f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3774 >        assertSame(g, g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3775 >        g.complete(v1);
3776 >        checkCompletedNormally(f, v1);
3777 >        checkCompletedNormally(g, v1);
3778 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3779 >    }}
3780 >
3781 >    /**
3782 >     * delayedExecutor returns an executor that delays submission
3783 >     */
3784 >    public void testDelayedExecutor() {
3785 >        testInParallel(() -> testDelayedExecutor(null, null),
3786 >                       () -> testDelayedExecutor(null, 1),
3787 >                       () -> testDelayedExecutor(new ThreadExecutor(), 1),
3788 >                       () -> testDelayedExecutor(new ThreadExecutor(), 1));
3789 >    }
3790 >
3791 >    public void testDelayedExecutor(Executor executor, Integer v) throws Exception {
3792 >        long timeoutMillis = timeoutMillis();
3793 >        // Use an "unreasonably long" long timeout to catch lingering threads
3794 >        long longTimeoutMillis = 1000 * 60 * 60 * 24;
3795 >        final Executor delayer, longDelayer;
3796 >        if (executor == null) {
3797 >            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS);
3798 >            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS);
3799 >        } else {
3800 >            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS, executor);
3801 >            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS, executor);
3802 >        }
3803 >        long startTime = System.nanoTime();
3804 >        CompletableFuture<Integer> f =
3805 >            CompletableFuture.supplyAsync(() -> v, delayer);
3806 >        CompletableFuture<Integer> g =
3807 >            CompletableFuture.supplyAsync(() -> v, longDelayer);
3808 >
3809 >        assertNull(g.getNow(null));
3810 >
3811 >        assertSame(v, f.get(LONG_DELAY_MS, MILLISECONDS));
3812 >        long millisElapsed = millisElapsedSince(startTime);
3813 >        assertTrue(millisElapsed >= timeoutMillis);
3814 >        assertTrue(millisElapsed < LONG_DELAY_MS / 2);
3815  
3816 <    /**
2196 <     * acceptEitherAsync result completes exceptionally if either
2197 <     * source cancelled
2198 <     */
2199 <    public void testAcceptEitherAsync4E() {
2200 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2201 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2202 <        IncAction r = new IncAction();
2203 <        CompletableFuture<Void> g = f.acceptEitherAsync(f2, r, new ThreadExecutor());
2204 <        assertTrue(f.cancel(true));
2205 <        checkCompletedWithWrappedCancellationException(g);
3816 >        checkCompletedNormally(f, v);
3817  
3818 <        r = new IncAction();
3819 <        f = new CompletableFuture<Integer>();
2209 <        f2 = new CompletableFuture<Integer>();
2210 <        assertTrue(f2.cancel(true));
2211 <        g = f.acceptEitherAsync(f2, r, new ThreadExecutor());
2212 <        checkCompletedWithWrappedCancellationException(g);
3818 >        checkIncomplete(g);
3819 >        assertTrue(g.cancel(true));
3820      }
3821  
3822 <    /**
2216 <     * runAfterEitherAsync result completes normally after normal
2217 <     * completion of sources
2218 <     */
2219 <    public void testRunAfterEitherAsyncE() {
2220 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2221 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2222 <        Noop r = new Noop();
2223 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
2224 <        f.complete(one);
2225 <        checkCompletedNormally(g, null);
2226 <        assertTrue(r.ran);
2227 <
2228 <        r = new Noop();
2229 <        f = new CompletableFuture<Integer>();
2230 <        f.complete(one);
2231 <        f2 = new CompletableFuture<Integer>();
2232 <        g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
2233 <        checkCompletedNormally(g, null);
2234 <        assertTrue(r.ran);
2235 <    }
3822 >    //--- tests of implementation details; not part of official tck ---
3823  
3824 <    /**
3825 <     * runAfterEitherAsync result completes exceptionally after exceptional
3826 <     * completion of source
3827 <     */
3828 <    public void testRunAfterEitherAsync2E() {
3829 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3830 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3831 <        Noop r = new Noop();
3832 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
2246 <        f.completeExceptionally(new CFException());
2247 <        checkCompletedWithWrappedCFException(g);
3824 >    Object resultOf(CompletableFuture<?> f) {
3825 >        SecurityManager sm = System.getSecurityManager();
3826 >        if (sm != null) {
3827 >            try {
3828 >                System.setSecurityManager(null);
3829 >            } catch (SecurityException giveUp) {
3830 >                return "Reflection not available";
3831 >            }
3832 >        }
3833  
3834 <        r = new Noop();
3835 <        f = new CompletableFuture<Integer>();
3836 <        f2 = new CompletableFuture<Integer>();
3837 <        f2.completeExceptionally(new CFException());
3838 <        g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
3839 <        f.complete(one);
3840 <        checkCompletedWithWrappedCFException(g);
3834 >        try {
3835 >            java.lang.reflect.Field resultField
3836 >                = CompletableFuture.class.getDeclaredField("result");
3837 >            resultField.setAccessible(true);
3838 >            return resultField.get(f);
3839 >        } catch (Throwable t) {
3840 >            throw new AssertionError(t);
3841 >        } finally {
3842 >            if (sm != null) System.setSecurityManager(sm);
3843 >        }
3844      }
3845  
3846 <    /**
3847 <     * runAfterEitherAsync result completes exceptionally if action does
3848 <     */
3849 <    public void testRunAfterEitherAsync3E() {
3850 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3851 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3852 <        FailingNoop r = new FailingNoop();
3853 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
3854 <        f.complete(one);
3855 <        checkCompletedWithWrappedCFException(g);
3856 <    }
3846 >    public void testExceptionPropagationReusesResultObject() {
3847 >        if (!testImplementationDetails) return;
3848 >        for (ExecutionMode m : ExecutionMode.values())
3849 >    {
3850 >        final CFException ex = new CFException();
3851 >        final CompletableFuture<Integer> v42 = CompletableFuture.completedFuture(42);
3852 >        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3853 >
3854 >        final Runnable noopRunnable = new Noop(m);
3855 >        final Consumer<Integer> noopConsumer = new NoopConsumer(m);
3856 >        final Function<Integer, Integer> incFunction = new IncFunction(m);
3857 >
3858 >        List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> funs
3859 >            = new ArrayList<>();
3860 >
3861 >        funs.add((y) -> m.thenRun(y, noopRunnable));
3862 >        funs.add((y) -> m.thenAccept(y, noopConsumer));
3863 >        funs.add((y) -> m.thenApply(y, incFunction));
3864 >
3865 >        funs.add((y) -> m.runAfterEither(y, incomplete, noopRunnable));
3866 >        funs.add((y) -> m.acceptEither(y, incomplete, noopConsumer));
3867 >        funs.add((y) -> m.applyToEither(y, incomplete, incFunction));
3868 >
3869 >        funs.add((y) -> m.runAfterBoth(y, v42, noopRunnable));
3870 >        funs.add((y) -> m.runAfterBoth(v42, y, noopRunnable));
3871 >        funs.add((y) -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3872 >        funs.add((y) -> m.thenAcceptBoth(v42, y, new SubtractAction(m)));
3873 >        funs.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m)));
3874 >        funs.add((y) -> m.thenCombine(v42, y, new SubtractFunction(m)));
3875 >
3876 >        funs.add((y) -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
3877 >
3878 >        funs.add((y) -> m.thenCompose(y, new CompletableFutureInc(m)));
3879 >
3880 >        funs.add((y) -> CompletableFuture.allOf(y));
3881 >        funs.add((y) -> CompletableFuture.allOf(y, v42));
3882 >        funs.add((y) -> CompletableFuture.allOf(v42, y));
3883 >        funs.add((y) -> CompletableFuture.anyOf(y));
3884 >        funs.add((y) -> CompletableFuture.anyOf(y, incomplete));
3885 >        funs.add((y) -> CompletableFuture.anyOf(incomplete, y));
3886 >
3887 >        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3888 >                 fun : funs) {
3889 >            CompletableFuture<Integer> f = new CompletableFuture<>();
3890 >            f.completeExceptionally(ex);
3891 >            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3892 >            checkCompletedWithWrappedException(src, ex);
3893 >            CompletableFuture<?> dep = fun.apply(src);
3894 >            checkCompletedWithWrappedException(dep, ex);
3895 >            assertSame(resultOf(src), resultOf(dep));
3896 >        }
3897  
3898 <    /**
3899 <     * runAfterEitherAsync result completes exceptionally if either
3900 <     * source cancelled
3901 <     */
3902 <    public void testRunAfterEitherAsync4E() {
3903 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3904 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3905 <        Noop r = new Noop();
3906 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
3907 <        assertTrue(f.cancel(true));
2280 <        checkCompletedWithWrappedCancellationException(g);
3898 >        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3899 >                 fun : funs) {
3900 >            CompletableFuture<Integer> f = new CompletableFuture<>();
3901 >            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3902 >            CompletableFuture<?> dep = fun.apply(src);
3903 >            f.completeExceptionally(ex);
3904 >            checkCompletedWithWrappedException(src, ex);
3905 >            checkCompletedWithWrappedException(dep, ex);
3906 >            assertSame(resultOf(src), resultOf(dep));
3907 >        }
3908  
3909 <        r = new Noop();
3910 <        f = new CompletableFuture<Integer>();
3911 <        f2 = new CompletableFuture<Integer>();
3912 <        assertTrue(f2.cancel(true));
3913 <        g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
3914 <        checkCompletedWithWrappedCancellationException(g);
3915 <    }
3909 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3910 >        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3911 >                 fun : funs) {
3912 >            CompletableFuture<Integer> f = new CompletableFuture<>();
3913 >            f.cancel(mayInterruptIfRunning);
3914 >            checkCancelled(f);
3915 >            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3916 >            checkCompletedWithWrappedCancellationException(src);
3917 >            CompletableFuture<?> dep = fun.apply(src);
3918 >            checkCompletedWithWrappedCancellationException(dep);
3919 >            assertSame(resultOf(src), resultOf(dep));
3920 >        }
3921  
3922 <    /**
3923 <     * thenComposeAsync result completes normally after normal
3924 <     * completion of source
3925 <     */
3926 <    public void testThenComposeAsyncE() {
3927 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3928 <        CompletableFutureInc r = new CompletableFutureInc();
3929 <        CompletableFuture<Integer> g = f.thenComposeAsync(r, new ThreadExecutor());
3930 <        f.complete(one);
3931 <        checkCompletedNormally(g, two);
3932 <    }
3922 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3923 >        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3924 >                 fun : funs) {
3925 >            CompletableFuture<Integer> f = new CompletableFuture<>();
3926 >            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3927 >            CompletableFuture<?> dep = fun.apply(src);
3928 >            f.cancel(mayInterruptIfRunning);
3929 >            checkCancelled(f);
3930 >            checkCompletedWithWrappedCancellationException(src);
3931 >            checkCompletedWithWrappedCancellationException(dep);
3932 >            assertSame(resultOf(src), resultOf(dep));
3933 >        }
3934 >    }}
3935  
3936      /**
3937 <     * thenComposeAsync result completes exceptionally after
2304 <     * exceptional completion of source
3937 >     * Minimal completion stages throw UOE for most non-CompletionStage methods
3938       */
3939 <    public void testThenComposeAsync2E() {
3940 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3941 <        CompletableFutureInc r = new CompletableFutureInc();
3942 <        CompletableFuture<Integer> g = f.thenComposeAsync(r, new ThreadExecutor());
3943 <        f.completeExceptionally(new CFException());
3944 <        checkCompletedWithWrappedCFException(g);
3939 >    public void testMinimalCompletionStage_minimality() {
3940 >        if (!testImplementationDetails) return;
3941 >        Function<Method, String> toSignature =
3942 >            (method) -> method.getName() + Arrays.toString(method.getParameterTypes());
3943 >        Predicate<Method> isNotStatic =
3944 >            (method) -> (method.getModifiers() & Modifier.STATIC) == 0;
3945 >        List<Method> minimalMethods =
3946 >            Stream.of(Object.class, CompletionStage.class)
3947 >            .flatMap((klazz) -> Stream.of(klazz.getMethods()))
3948 >            .filter(isNotStatic)
3949 >            .collect(Collectors.toList());
3950 >        // Methods from CompletableFuture permitted NOT to throw UOE
3951 >        String[] signatureWhitelist = {
3952 >            "newIncompleteFuture[]",
3953 >            "defaultExecutor[]",
3954 >            "minimalCompletionStage[]",
3955 >            "copy[]",
3956 >        };
3957 >        Set<String> permittedMethodSignatures =
3958 >            Stream.concat(minimalMethods.stream().map(toSignature),
3959 >                          Stream.of(signatureWhitelist))
3960 >            .collect(Collectors.toSet());
3961 >        List<Method> allMethods = Stream.of(CompletableFuture.class.getMethods())
3962 >            .filter(isNotStatic)
3963 >            .filter((method) -> !permittedMethodSignatures.contains(toSignature.apply(method)))
3964 >            .collect(Collectors.toList());
3965 >
3966 >        List<CompletionStage<Integer>> stages = new ArrayList<>();
3967 >        stages.add(new CompletableFuture<Integer>().minimalCompletionStage());
3968 >        stages.add(CompletableFuture.completedStage(1));
3969 >        stages.add(CompletableFuture.failedStage(new CFException()));
3970 >
3971 >        List<Method> bugs = new ArrayList<>();
3972 >        for (Method method : allMethods) {
3973 >            Class<?>[] parameterTypes = method.getParameterTypes();
3974 >            Object[] args = new Object[parameterTypes.length];
3975 >            // Manufacture boxed primitives for primitive params
3976 >            for (int i = 0; i < args.length; i++) {
3977 >                Class<?> type = parameterTypes[i];
3978 >                if (parameterTypes[i] == boolean.class)
3979 >                    args[i] = false;
3980 >                else if (parameterTypes[i] == int.class)
3981 >                    args[i] = 0;
3982 >                else if (parameterTypes[i] == long.class)
3983 >                    args[i] = 0L;
3984 >            }
3985 >            for (CompletionStage<Integer> stage : stages) {
3986 >                try {
3987 >                    method.invoke(stage, args);
3988 >                    bugs.add(method);
3989 >                }
3990 >                catch (java.lang.reflect.InvocationTargetException expected) {
3991 >                    if (! (expected.getCause() instanceof UnsupportedOperationException)) {
3992 >                        bugs.add(method);
3993 >                        // expected.getCause().printStackTrace();
3994 >                    }
3995 >                }
3996 >                catch (ReflectiveOperationException bad) { throw new Error(bad); }
3997 >            }
3998 >        }
3999 >        if (!bugs.isEmpty())
4000 >            throw new Error("Methods did not throw UOE: " + bugs);
4001      }
4002  
4003 <    /**
4004 <     * thenComposeAsync result completes exceptionally if action does
4005 <     */
4006 <    public void testThenComposeAsync3E() {
4007 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
4008 <        FailingCompletableFutureFunction r = new FailingCompletableFutureFunction();
4009 <        CompletableFuture<Integer> g = f.thenComposeAsync(r, new ThreadExecutor());
4010 <        f.complete(one);
4011 <        checkCompletedWithWrappedCFException(g);
4012 <    }
4003 >    static class Monad {
4004 >        static class ZeroException extends RuntimeException {
4005 >            public ZeroException() { super("monadic zero"); }
4006 >        }
4007 >        // "return", "unit"
4008 >        static <T> CompletableFuture<T> unit(T value) {
4009 >            return completedFuture(value);
4010 >        }
4011 >        // monadic zero ?
4012 >        static <T> CompletableFuture<T> zero() {
4013 >            return failedFuture(new ZeroException());
4014 >        }
4015 >        // >=>
4016 >        static <T,U,V> Function<T, CompletableFuture<V>> compose
4017 >            (Function<T, CompletableFuture<U>> f,
4018 >             Function<U, CompletableFuture<V>> g) {
4019 >            return (x) -> f.apply(x).thenCompose(g);
4020 >        }
4021  
4022 <    /**
4023 <     * thenComposeAsync result completes exceptionally if source cancelled
4024 <     */
4025 <    public void testThenComposeAsync4E() {
4026 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
4027 <        CompletableFutureInc r = new CompletableFutureInc();
4028 <        CompletableFuture<Integer> g = f.thenComposeAsync(r, new ThreadExecutor());
4029 <        assertTrue(f.cancel(true));
2333 <        checkCompletedWithWrappedCancellationException(g);
2334 <    }
4022 >        static void assertZero(CompletableFuture<?> f) {
4023 >            try {
4024 >                f.getNow(null);
4025 >                throw new AssertionFailedError("should throw");
4026 >            } catch (CompletionException success) {
4027 >                assertTrue(success.getCause() instanceof ZeroException);
4028 >            }
4029 >        }
4030  
4031 <    // other static methods
4031 >        static <T> void assertFutureEquals(CompletableFuture<T> f,
4032 >                                           CompletableFuture<T> g) {
4033 >            T fval = null, gval = null;
4034 >            Throwable fex = null, gex = null;
4035 >
4036 >            try { fval = f.get(); }
4037 >            catch (ExecutionException ex) { fex = ex.getCause(); }
4038 >            catch (Throwable ex) { fex = ex; }
4039 >
4040 >            try { gval = g.get(); }
4041 >            catch (ExecutionException ex) { gex = ex.getCause(); }
4042 >            catch (Throwable ex) { gex = ex; }
4043 >
4044 >            if (fex != null || gex != null)
4045 >                assertSame(fex.getClass(), gex.getClass());
4046 >            else
4047 >                assertEquals(fval, gval);
4048 >        }
4049  
4050 <    /**
4051 <     * allOf(no component futures) returns a future completed normally
4052 <     * with the value null
2341 <     */
2342 <    public void testAllOf_empty() throws Exception {
2343 <        CompletableFuture<?> f = CompletableFuture.allOf();
2344 <        checkCompletedNormally(f, null);
2345 <    }
4050 >        static class PlusFuture<T> extends CompletableFuture<T> {
4051 >            AtomicReference<Throwable> firstFailure = new AtomicReference<>(null);
4052 >        }
4053  
4054 <    /**
4055 <     * allOf returns a future completed when all components complete
4056 <     */
4057 <    public void testAllOf() throws Exception {
4058 <        for (int k = 1; k < 20; ++k) {
4059 <            CompletableFuture[] fs = new CompletableFuture[k];
4060 <            for (int i = 0; i < k; ++i)
4061 <                fs[i] = new CompletableFuture<Integer>();
4062 <            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
4063 <            for (int i = 0; i < k; ++i) {
4064 <                checkIncomplete(f);
4065 <                fs[i].complete(one);
4066 <            }
4067 <            checkCompletedNormally(f, null);
4054 >        /** Implements "monadic plus". */
4055 >        static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f,
4056 >                                             CompletableFuture<? extends T> g) {
4057 >            PlusFuture<T> plus = new PlusFuture<T>();
4058 >            BiConsumer<T, Throwable> action = (T result, Throwable ex) -> {
4059 >                try {
4060 >                    if (ex == null) {
4061 >                        if (plus.complete(result))
4062 >                            if (plus.firstFailure.get() != null)
4063 >                                plus.firstFailure.set(null);
4064 >                    }
4065 >                    else if (plus.firstFailure.compareAndSet(null, ex)) {
4066 >                        if (plus.isDone())
4067 >                            plus.firstFailure.set(null);
4068 >                    }
4069 >                    else {
4070 >                        // first failure has precedence
4071 >                        Throwable first = plus.firstFailure.getAndSet(null);
4072 >
4073 >                        // may fail with "Self-suppression not permitted"
4074 >                        try { first.addSuppressed(ex); }
4075 >                        catch (Exception ignored) {}
4076 >
4077 >                        plus.completeExceptionally(first);
4078 >                    }
4079 >                } catch (Throwable unexpected) {
4080 >                    plus.completeExceptionally(unexpected);
4081 >                }
4082 >            };
4083 >            f.whenComplete(action);
4084 >            g.whenComplete(action);
4085 >            return plus;
4086          }
4087      }
4088  
4089      /**
4090 <     * anyOf(no component futures) returns an incomplete future
4090 >     * CompletableFuture is an additive monad - sort of.
4091 >     * https://en.wikipedia.org/wiki/Monad_(functional_programming)#Additive_monads
4092       */
4093 <    public void testAnyOf_empty() throws Exception {
4094 <        CompletableFuture<?> f = CompletableFuture.anyOf();
4095 <        checkIncomplete(f);
4096 <    }
4093 >    public void testAdditiveMonad() throws Throwable {
4094 >        Function<Long, CompletableFuture<Long>> unit = Monad::unit;
4095 >        CompletableFuture<Long> zero = Monad.zero();
4096 >
4097 >        // Some mutually non-commutative functions
4098 >        Function<Long, CompletableFuture<Long>> triple
4099 >            = (x) -> Monad.unit(3 * x);
4100 >        Function<Long, CompletableFuture<Long>> inc
4101 >            = (x) -> Monad.unit(x + 1);
4102 >
4103 >        // unit is a right identity: m >>= unit === m
4104 >        Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
4105 >                                 inc.apply(5L));
4106 >        // unit is a left identity: (unit x) >>= f === f x
4107 >        Monad.assertFutureEquals(unit.apply(5L).thenCompose(inc),
4108 >                                 inc.apply(5L));
4109 >
4110 >        // associativity: (m >>= f) >>= g === m >>= ( \x -> (f x >>= g) )
4111 >        Monad.assertFutureEquals(
4112 >            unit.apply(5L).thenCompose(inc).thenCompose(triple),
4113 >            unit.apply(5L).thenCompose((x) -> inc.apply(x).thenCompose(triple)));
4114 >
4115 >        // The case for CompletableFuture as an additive monad is weaker...
4116 >
4117 >        // zero is a monadic zero
4118 >        Monad.assertZero(zero);
4119 >
4120 >        // left zero: zero >>= f === zero
4121 >        Monad.assertZero(zero.thenCompose(inc));
4122 >        // right zero: f >>= (\x -> zero) === zero
4123 >        Monad.assertZero(inc.apply(5L).thenCompose((x) -> zero));
4124 >
4125 >        // f plus zero === f
4126 >        Monad.assertFutureEquals(Monad.unit(5L),
4127 >                                 Monad.plus(Monad.unit(5L), zero));
4128 >        // zero plus f === f
4129 >        Monad.assertFutureEquals(Monad.unit(5L),
4130 >                                 Monad.plus(zero, Monad.unit(5L)));
4131 >        // zero plus zero === zero
4132 >        Monad.assertZero(Monad.plus(zero, zero));
4133 >        {
4134 >            CompletableFuture<Long> f = Monad.plus(Monad.unit(5L),
4135 >                                                   Monad.unit(8L));
4136 >            // non-determinism
4137 >            assertTrue(f.get() == 5L || f.get() == 8L);
4138 >        }
4139  
4140 <    /**
4141 <     * allOf returns a future completed when any components complete
4142 <     */
4143 <    public void testAnyOf() throws Exception {
4144 <        for (int k = 1; k < 20; ++k) {
4145 <            CompletableFuture[] fs = new CompletableFuture[k];
4146 <            for (int i = 0; i < k; ++i)
4147 <                fs[i] = new CompletableFuture<Integer>();
4148 <            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
4149 <            checkIncomplete(f);
4150 <            for (int i = 0; i < k; ++i) {
4151 <                fs[i].complete(one);
4152 <                checkCompletedNormally(f, one);
4153 <            }
4140 >        CompletableFuture<Long> godot = new CompletableFuture<>();
4141 >        // f plus godot === f (doesn't wait for godot)
4142 >        Monad.assertFutureEquals(Monad.unit(5L),
4143 >                                 Monad.plus(Monad.unit(5L), godot));
4144 >        // godot plus f === f (doesn't wait for godot)
4145 >        Monad.assertFutureEquals(Monad.unit(5L),
4146 >                                 Monad.plus(godot, Monad.unit(5L)));
4147 >    }
4148 >
4149 >    /** Test long recursive chains of CompletableFutures with cascading completions */
4150 >    public void testRecursiveChains() throws Throwable {
4151 >        for (ExecutionMode m : ExecutionMode.values())
4152 >        for (boolean addDeadEnds : new boolean[] { true, false })
4153 >    {
4154 >        final int val = 42;
4155 >        final int n = expensiveTests ? 1_000 : 2;
4156 >        CompletableFuture<Integer> head = new CompletableFuture<>();
4157 >        CompletableFuture<Integer> tail = head;
4158 >        for (int i = 0; i < n; i++) {
4159 >            if (addDeadEnds) m.thenApply(tail, v -> v + 1);
4160 >            tail = m.thenApply(tail, v -> v + 1);
4161 >            if (addDeadEnds) m.applyToEither(tail, tail, v -> v + 1);
4162 >            tail = m.applyToEither(tail, tail, v -> v + 1);
4163 >            if (addDeadEnds) m.thenCombine(tail, tail, (v, w) -> v + 1);
4164 >            tail = m.thenCombine(tail, tail, (v, w) -> v + 1);
4165 >        }
4166 >        head.complete(val);
4167 >        assertEquals(val + 3 * n, (int) tail.join());
4168 >    }}
4169 >
4170 >    /**
4171 >     * A single CompletableFuture with many dependents.
4172 >     * A demo of scalability - runtime is O(n).
4173 >     */
4174 >    public void testManyDependents() throws Throwable {
4175 >        final int n = expensiveTests ? 1_000_000 : 10;
4176 >        final CompletableFuture<Void> head = new CompletableFuture<>();
4177 >        final CompletableFuture<Void> complete = CompletableFuture.completedFuture((Void)null);
4178 >        final AtomicInteger count = new AtomicInteger(0);
4179 >        for (int i = 0; i < n; i++) {
4180 >            head.thenRun(() -> count.getAndIncrement());
4181 >            head.thenAccept((x) -> count.getAndIncrement());
4182 >            head.thenApply((x) -> count.getAndIncrement());
4183 >
4184 >            head.runAfterBoth(complete, () -> count.getAndIncrement());
4185 >            head.thenAcceptBoth(complete, (x, y) -> count.getAndIncrement());
4186 >            head.thenCombine(complete, (x, y) -> count.getAndIncrement());
4187 >            complete.runAfterBoth(head, () -> count.getAndIncrement());
4188 >            complete.thenAcceptBoth(head, (x, y) -> count.getAndIncrement());
4189 >            complete.thenCombine(head, (x, y) -> count.getAndIncrement());
4190 >
4191 >            head.runAfterEither(new CompletableFuture<Void>(), () -> count.getAndIncrement());
4192 >            head.acceptEither(new CompletableFuture<Void>(), (x) -> count.getAndIncrement());
4193 >            head.applyToEither(new CompletableFuture<Void>(), (x) -> count.getAndIncrement());
4194 >            new CompletableFuture<Void>().runAfterEither(head, () -> count.getAndIncrement());
4195 >            new CompletableFuture<Void>().acceptEither(head, (x) -> count.getAndIncrement());
4196 >            new CompletableFuture<Void>().applyToEither(head, (x) -> count.getAndIncrement());
4197          }
4198 +        head.complete(null);
4199 +        assertEquals(5 * 3 * n, count.get());
4200      }
4201  
4202 <    /**
4203 <     * Completion methods throw NullPointerException with null arguments
4204 <     */
4205 <    public void testNPE() {
4206 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
4207 <        CompletableFuture<Integer> g = new CompletableFuture<Integer>();
4208 <        CompletableFuture h;
4209 <        try { h = f.thenApply(null); } catch (NullPointerException ok) {}
4210 <        try { h = f.thenAccept(null); } catch (NullPointerException ok) {}
4211 <        try { h = f.thenRun(null); } catch (NullPointerException ok) {}
4212 <        try { h = f.thenCombine(g, null); } catch (NullPointerException ok) {}
4213 <        try { h = f.thenCombine(null, null); } catch (NullPointerException ok) {}
4214 <        try { h = f.applyToEither(g, null); } catch (NullPointerException ok) {}
4215 <        try { h = f.applyToEither(null, null); } catch (NullPointerException ok) {}
4216 <        try { h = f.thenAcceptBoth(g, null); } catch (NullPointerException ok) {}
4217 <        try { h = f.thenAcceptBoth(null, null); } catch (NullPointerException ok) {}
4218 <        try { h = f.runAfterEither(g, null); } catch (NullPointerException ok) {}
4219 <        try { h = f.runAfterEither(null, null); } catch (NullPointerException ok) {}
4220 <        try { h = f.runAfterBoth(g, null); } catch (NullPointerException ok) {}
4221 <        try { h = f.runAfterBoth(null, null); } catch (NullPointerException ok) {}
4222 <        try { h = f.exceptionally(null); } catch (NullPointerException ok) {}
4223 <        try { h = f.handle(null); } catch (NullPointerException ok) {}
2411 <        try { h = f.thenCompose(null); } catch (NullPointerException ok) {}
2412 <
2413 <        try { h = f.thenApplyAsync(null); } catch (NullPointerException ok) {}
2414 <        try { h = f.thenAcceptAsync(null); } catch (NullPointerException ok) {}
2415 <        try { h = f.thenRunAsync(null); } catch (NullPointerException ok) {}
2416 <        try { h = f.thenCombineAsync(g, null); } catch (NullPointerException ok) {}
2417 <        try { h = f.thenCombineAsync(null, null); } catch (NullPointerException ok) {}
2418 <        try { h = f.applyToEitherAsync(g, null); } catch (NullPointerException ok) {}
2419 <        try { h = f.applyToEitherAsync(null, null); } catch (NullPointerException ok) {}
2420 <        try { h = f.thenAcceptBothAsync(g, null); } catch (NullPointerException ok) {}
2421 <        try { h = f.thenAcceptBothAsync(null, null); } catch (NullPointerException ok) {}
2422 <        try { h = f.runAfterEitherAsync(g, null); } catch (NullPointerException ok) {}
2423 <        try { h = f.runAfterEitherAsync(null, null); } catch (NullPointerException ok) {}
2424 <        try { h = f.runAfterBothAsync(g, null); } catch (NullPointerException ok) {}
2425 <        try { h = f.runAfterBothAsync(null, null); } catch (NullPointerException ok) {}
4202 >    /** ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest tck */
4203 >    public void testCoCompletionGarbageRetention() throws Throwable {
4204 >        final int n = expensiveTests ? 1_000_000 : 10;
4205 >        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
4206 >        CompletableFuture<Integer> f;
4207 >        for (int i = 0; i < n; i++) {
4208 >            f = new CompletableFuture<>();
4209 >            f.runAfterEither(incomplete, () -> {});
4210 >            f.complete(null);
4211 >
4212 >            f = new CompletableFuture<>();
4213 >            f.acceptEither(incomplete, (x) -> {});
4214 >            f.complete(null);
4215 >
4216 >            f = new CompletableFuture<>();
4217 >            f.applyToEither(incomplete, (x) -> x);
4218 >            f.complete(null);
4219 >
4220 >            f = new CompletableFuture<>();
4221 >            CompletableFuture.anyOf(new CompletableFuture<?>[] { f, incomplete });
4222 >            f.complete(null);
4223 >        }
4224  
4225 +        for (int i = 0; i < n; i++) {
4226 +            f = new CompletableFuture<>();
4227 +            incomplete.runAfterEither(f, () -> {});
4228 +            f.complete(null);
4229 +
4230 +            f = new CompletableFuture<>();
4231 +            incomplete.acceptEither(f, (x) -> {});
4232 +            f.complete(null);
4233 +
4234 +            f = new CompletableFuture<>();
4235 +            incomplete.applyToEither(f, (x) -> x);
4236 +            f.complete(null);
4237 +
4238 +            f = new CompletableFuture<>();
4239 +            CompletableFuture.anyOf(new CompletableFuture<?>[] { incomplete, f });
4240 +            f.complete(null);
4241 +        }
4242      }
4243  
4244 +    /**
4245 +     * Reproduction recipe for:
4246 +     * 8160402: Garbage retention with CompletableFuture.anyOf
4247 +     * cvs update -D '2016-05-01' ./src/main/java/util/concurrent/CompletableFuture.java && ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testAnyOfGarbageRetention tck; cvs update -A
4248 +     */
4249 +    public void testAnyOfGarbageRetention() throws Throwable {
4250 +        for (Integer v : new Integer[] { 1, null })
4251 +    {
4252 +        final int n = expensiveTests ? 100_000 : 10;
4253 +        CompletableFuture<Integer>[] fs
4254 +            = (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4255 +        for (int i = 0; i < fs.length; i++)
4256 +            fs[i] = new CompletableFuture<>();
4257 +        fs[fs.length - 1].complete(v);
4258 +        for (int i = 0; i < n; i++)
4259 +            checkCompletedNormally(CompletableFuture.anyOf(fs), v);
4260 +    }}
4261 +
4262 +    /**
4263 +     * Checks for garbage retention with allOf.
4264 +     *
4265 +     * As of 2016-07, fails with OOME:
4266 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledAllOfGarbageRetention tck
4267 +     */
4268 +    public void testCancelledAllOfGarbageRetention() throws Throwable {
4269 +        final int n = expensiveTests ? 100_000 : 10;
4270 +        CompletableFuture<Integer>[] fs
4271 +            = (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4272 +        for (int i = 0; i < fs.length; i++)
4273 +            fs[i] = new CompletableFuture<>();
4274 +        for (int i = 0; i < n; i++)
4275 +            assertTrue(CompletableFuture.allOf(fs).cancel(false));
4276 +    }
4277 +
4278 +    /**
4279 +     * Checks for garbage retention when a dependent future is
4280 +     * cancelled and garbage-collected.
4281 +     * 8161600: Garbage retention when source CompletableFutures are never completed
4282 +     *
4283 +     * As of 2016-07, fails with OOME:
4284 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledGarbageRetention tck
4285 +     */
4286 +    public void testCancelledGarbageRetention() throws Throwable {
4287 +        final int n = expensiveTests ? 100_000 : 10;
4288 +        CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4289 +        for (int i = 0; i < n; i++)
4290 +            assertTrue(neverCompleted.thenRun(() -> {}).cancel(true));
4291 +    }
4292 +
4293 + //     static <U> U join(CompletionStage<U> stage) {
4294 + //         CompletableFuture<U> f = new CompletableFuture<>();
4295 + //         stage.whenComplete((v, ex) -> {
4296 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4297 + //         });
4298 + //         return f.join();
4299 + //     }
4300 +
4301 + //     static <U> boolean isDone(CompletionStage<U> stage) {
4302 + //         CompletableFuture<U> f = new CompletableFuture<>();
4303 + //         stage.whenComplete((v, ex) -> {
4304 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4305 + //         });
4306 + //         return f.isDone();
4307 + //     }
4308 +
4309 + //     static <U> U join2(CompletionStage<U> stage) {
4310 + //         return stage.toCompletableFuture().copy().join();
4311 + //     }
4312 +
4313 + //     static <U> boolean isDone2(CompletionStage<U> stage) {
4314 + //         return stage.toCompletableFuture().copy().isDone();
4315 + //     }
4316  
4317   }

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