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Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.14 by jsr166, Mon Apr 1 20:06:25 2013 UTC vs.
Revision 1.154 by jsr166, Sun Jun 26 19:27:42 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.TimeUnit;
36   import java.util.concurrent.atomic.AtomicInteger;
37 < 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;
37 > import java.util.concurrent.atomic.AtomicReference;
38   import java.util.function.BiConsumer;
27 import java.util.function.Function;
39   import java.util.function.BiFunction;
40 + import java.util.function.Consumer;
41 + import java.util.function.Function;
42 + import java.util.function.Predicate;
43 + import java.util.function.Supplier;
44 +
45 + import junit.framework.AssertionFailedError;
46 + import junit.framework.Test;
47 + import junit.framework.TestSuite;
48  
49   public class CompletableFutureTest extends JSR166TestCase {
50  
51      public static void main(String[] args) {
52 <        junit.textui.TestRunner.run(suite());
52 >        main(suite(), args);
53      }
54      public static Test suite() {
55          return new TestSuite(CompletableFutureTest.class);
# Line 41 | Line 60 | public class CompletableFutureTest exten
60      void checkIncomplete(CompletableFuture<?> f) {
61          assertFalse(f.isDone());
62          assertFalse(f.isCancelled());
63 <        assertTrue(f.toString().contains("[Not completed]"));
63 >        assertTrue(f.toString().contains("Not completed"));
64          try {
65              assertNull(f.getNow(null));
66          } catch (Throwable fail) { threadUnexpectedException(fail); }
# Line 54 | Line 73 | public class CompletableFutureTest exten
73      }
74  
75      <T> void checkCompletedNormally(CompletableFuture<T> f, T value) {
76 +        checkTimedGet(f, value);
77 +
78          try {
79              assertEquals(value, f.join());
80          } catch (Throwable fail) { threadUnexpectedException(fail); }
# Line 63 | Line 84 | public class CompletableFutureTest exten
84          try {
85              assertEquals(value, f.get());
86          } catch (Throwable fail) { threadUnexpectedException(fail); }
66        try {
67            assertEquals(value, f.get(0L, SECONDS));
68        } catch (Throwable fail) { threadUnexpectedException(fail); }
87          assertTrue(f.isDone());
88          assertFalse(f.isCancelled());
89 +        assertFalse(f.isCompletedExceptionally());
90          assertTrue(f.toString().contains("[Completed normally]"));
91      }
92  
93 <    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
93 >    /**
94 >     * Returns the "raw" internal exceptional completion of f,
95 >     * without any additional wrapping with CompletionException.
96 >     */
97 >    <U> Throwable exceptionalCompletion(CompletableFuture<U> f) {
98 >        // handle (and whenComplete) can distinguish between "direct"
99 >        // and "wrapped" exceptional completion
100 >        return f.handle((U u, Throwable t) -> t).join();
101 >    }
102 >
103 >    void checkCompletedExceptionally(CompletableFuture<?> f,
104 >                                     boolean wrapped,
105 >                                     Consumer<Throwable> checker) {
106 >        Throwable cause = exceptionalCompletion(f);
107 >        if (wrapped) {
108 >            assertTrue(cause instanceof CompletionException);
109 >            cause = cause.getCause();
110 >        }
111 >        checker.accept(cause);
112 >
113 >        long startTime = System.nanoTime();
114 >        try {
115 >            f.get(LONG_DELAY_MS, MILLISECONDS);
116 >            shouldThrow();
117 >        } catch (ExecutionException success) {
118 >            assertSame(cause, success.getCause());
119 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
120 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
121 >
122          try {
123              f.join();
124              shouldThrow();
125          } catch (CompletionException success) {
126 <            assertTrue(success.getCause() instanceof CFException);
127 <        }
126 >            assertSame(cause, success.getCause());
127 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
128 >
129          try {
130              f.getNow(null);
131              shouldThrow();
132          } catch (CompletionException success) {
133 <            assertTrue(success.getCause() instanceof CFException);
86 <        }
87 <        try {
88 <            f.get();
89 <            shouldThrow();
90 <        } catch (ExecutionException success) {
91 <            assertTrue(success.getCause() instanceof CFException);
133 >            assertSame(cause, success.getCause());
134          } catch (Throwable fail) { threadUnexpectedException(fail); }
135 +
136          try {
137 <            f.get(0L, SECONDS);
137 >            f.get();
138              shouldThrow();
139          } catch (ExecutionException success) {
140 <            assertTrue(success.getCause() instanceof CFException);
140 >            assertSame(cause, success.getCause());
141          } catch (Throwable fail) { threadUnexpectedException(fail); }
142 <        assertTrue(f.isDone());
142 >
143          assertFalse(f.isCancelled());
144 +        assertTrue(f.isDone());
145 +        assertTrue(f.isCompletedExceptionally());
146          assertTrue(f.toString().contains("[Completed exceptionally]"));
147      }
148  
149 +    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
150 +        checkCompletedExceptionally(f, true,
151 +            (t) -> assertTrue(t instanceof CFException));
152 +    }
153 +
154 +    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
155 +        checkCompletedExceptionally(f, true,
156 +            (t) -> assertTrue(t instanceof CancellationException));
157 +    }
158 +
159 +    void checkCompletedWithTimeoutException(CompletableFuture<?> f) {
160 +        checkCompletedExceptionally(f, false,
161 +            (t) -> assertTrue(t instanceof TimeoutException));
162 +    }
163 +
164 +    void checkCompletedWithWrappedException(CompletableFuture<?> f,
165 +                                            Throwable ex) {
166 +        checkCompletedExceptionally(f, true, (t) -> assertSame(t, ex));
167 +    }
168 +
169 +    void checkCompletedExceptionally(CompletableFuture<?> f, Throwable ex) {
170 +        checkCompletedExceptionally(f, false, (t) -> assertSame(t, ex));
171 +    }
172 +
173      void checkCancelled(CompletableFuture<?> f) {
174 +        long startTime = System.nanoTime();
175          try {
176 <            f.join();
107 <            shouldThrow();
108 <        } catch (CancellationException success) {}
109 <        try {
110 <            f.getNow(null);
111 <            shouldThrow();
112 <        } catch (CancellationException success) {}
113 <        try {
114 <            f.get();
115 <            shouldThrow();
116 <        } catch (CancellationException success) {
117 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
118 <        try {
119 <            f.get(0L, SECONDS);
176 >            f.get(LONG_DELAY_MS, MILLISECONDS);
177              shouldThrow();
178          } catch (CancellationException success) {
179          } catch (Throwable fail) { threadUnexpectedException(fail); }
180 <        assertTrue(f.isDone());
124 <        assertTrue(f.isCancelled());
125 <        assertTrue(f.toString().contains("[Completed exceptionally]"));
126 <    }
180 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
181  
128    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
182          try {
183              f.join();
184              shouldThrow();
185 <        } catch (CompletionException success) {
133 <            assertTrue(success.getCause() instanceof CancellationException);
134 <        }
185 >        } catch (CancellationException success) {}
186          try {
187              f.getNow(null);
188              shouldThrow();
189 <        } catch (CompletionException success) {
139 <            assertTrue(success.getCause() instanceof CancellationException);
140 <        }
189 >        } catch (CancellationException success) {}
190          try {
191              f.get();
192              shouldThrow();
193 <        } catch (ExecutionException success) {
145 <            assertTrue(success.getCause() instanceof CancellationException);
146 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
147 <        try {
148 <            f.get(0L, SECONDS);
149 <            shouldThrow();
150 <        } catch (ExecutionException success) {
151 <            assertTrue(success.getCause() instanceof CancellationException);
193 >        } catch (CancellationException success) {
194          } catch (Throwable fail) { threadUnexpectedException(fail); }
195 +
196 +        assertTrue(exceptionalCompletion(f) instanceof CancellationException);
197 +
198          assertTrue(f.isDone());
199 <        assertFalse(f.isCancelled());
199 >        assertTrue(f.isCompletedExceptionally());
200 >        assertTrue(f.isCancelled());
201          assertTrue(f.toString().contains("[Completed exceptionally]"));
202      }
203  
# Line 160 | Line 206 | public class CompletableFutureTest exten
206       * by methods isDone, isCancelled, and getNow
207       */
208      public void testConstructor() {
209 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
209 >        CompletableFuture<Integer> f = new CompletableFuture<>();
210          checkIncomplete(f);
211      }
212  
# Line 169 | Line 215 | public class CompletableFutureTest exten
215       * isCancelled, join, get, and getNow
216       */
217      public void testComplete() {
218 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
218 >        for (Integer v1 : new Integer[] { 1, null })
219 >    {
220 >        CompletableFuture<Integer> f = new CompletableFuture<>();
221          checkIncomplete(f);
222 <        f.complete(one);
223 <        checkCompletedNormally(f, one);
224 <    }
222 >        assertTrue(f.complete(v1));
223 >        assertFalse(f.complete(v1));
224 >        checkCompletedNormally(f, v1);
225 >    }}
226  
227      /**
228       * completeExceptionally completes exceptionally, as indicated by
229       * methods isDone, isCancelled, join, get, and getNow
230       */
231      public void testCompleteExceptionally() {
232 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
232 >        CompletableFuture<Integer> f = new CompletableFuture<>();
233 >        CFException ex = new CFException();
234          checkIncomplete(f);
235 <        f.completeExceptionally(new CFException());
236 <        checkCompletedWithWrappedCFException(f);
235 >        f.completeExceptionally(ex);
236 >        checkCompletedExceptionally(f, ex);
237      }
238  
239      /**
# Line 191 | Line 241 | public class CompletableFutureTest exten
241       * methods isDone, isCancelled, join, get, and getNow
242       */
243      public void testCancel() {
244 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
244 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
245 >    {
246 >        CompletableFuture<Integer> f = new CompletableFuture<>();
247          checkIncomplete(f);
248 <        assertTrue(f.cancel(true));
248 >        assertTrue(f.cancel(mayInterruptIfRunning));
249 >        assertTrue(f.cancel(mayInterruptIfRunning));
250 >        assertTrue(f.cancel(!mayInterruptIfRunning));
251          checkCancelled(f);
252 <    }
252 >    }}
253  
254      /**
255       * obtrudeValue forces completion with given value
256       */
257      public void testObtrudeValue() {
258 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
258 >        CompletableFuture<Integer> f = new CompletableFuture<>();
259          checkIncomplete(f);
260 <        f.complete(one);
260 >        assertTrue(f.complete(one));
261          checkCompletedNormally(f, one);
262          f.obtrudeValue(three);
263          checkCompletedNormally(f, three);
264          f.obtrudeValue(two);
265          checkCompletedNormally(f, two);
266 <        f = new CompletableFuture<Integer>();
266 >        f = new CompletableFuture<>();
267          f.obtrudeValue(three);
268          checkCompletedNormally(f, three);
269 <        f = new CompletableFuture<Integer>();
269 >        f.obtrudeValue(null);
270 >        checkCompletedNormally(f, null);
271 >        f = new CompletableFuture<>();
272          f.completeExceptionally(new CFException());
273          f.obtrudeValue(four);
274          checkCompletedNormally(f, four);
# Line 222 | Line 278 | public class CompletableFutureTest exten
278       * obtrudeException forces completion with given exception
279       */
280      public void testObtrudeException() {
281 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
282 <        checkIncomplete(f);
283 <        f.complete(one);
284 <        checkCompletedNormally(f, one);
285 <        f.obtrudeException(new CFException());
286 <        checkCompletedWithWrappedCFException(f);
287 <        f = new CompletableFuture<Integer>();
288 <        f.obtrudeException(new CFException());
289 <        checkCompletedWithWrappedCFException(f);
290 <        f = new CompletableFuture<Integer>();
281 >        for (Integer v1 : new Integer[] { 1, null })
282 >    {
283 >        CFException ex;
284 >        CompletableFuture<Integer> f;
285 >
286 >        f = new CompletableFuture<>();
287 >        assertTrue(f.complete(v1));
288 >        for (int i = 0; i < 2; i++) {
289 >            f.obtrudeException(ex = new CFException());
290 >            checkCompletedExceptionally(f, ex);
291 >        }
292 >
293 >        f = new CompletableFuture<>();
294 >        for (int i = 0; i < 2; i++) {
295 >            f.obtrudeException(ex = new CFException());
296 >            checkCompletedExceptionally(f, ex);
297 >        }
298 >
299 >        f = new CompletableFuture<>();
300 >        f.completeExceptionally(ex = new CFException());
301 >        f.obtrudeValue(v1);
302 >        checkCompletedNormally(f, v1);
303 >        f.obtrudeException(ex = new CFException());
304 >        checkCompletedExceptionally(f, ex);
305          f.completeExceptionally(new CFException());
306 <        f.obtrudeValue(four);
307 <        checkCompletedNormally(f, four);
308 <        f.obtrudeException(new CFException());
309 <        checkCompletedWithWrappedCFException(f);
240 <    }
306 >        checkCompletedExceptionally(f, ex);
307 >        assertFalse(f.complete(v1));
308 >        checkCompletedExceptionally(f, ex);
309 >    }}
310  
311      /**
312       * getNumberOfDependents returns number of dependent tasks
313       */
314      public void testGetNumberOfDependents() {
315 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
316 <        assertEquals(f.getNumberOfDependents(), 0);
317 <        CompletableFuture g = f.thenRun(new Noop());
318 <        assertEquals(f.getNumberOfDependents(), 1);
319 <        assertEquals(g.getNumberOfDependents(), 0);
320 <        CompletableFuture h = f.thenRun(new Noop());
321 <        assertEquals(f.getNumberOfDependents(), 2);
322 <        f.complete(1);
315 >        for (ExecutionMode m : ExecutionMode.values())
316 >        for (Integer v1 : new Integer[] { 1, null })
317 >    {
318 >        CompletableFuture<Integer> f = new CompletableFuture<>();
319 >        assertEquals(0, f.getNumberOfDependents());
320 >        final CompletableFuture<Void> g = m.thenRun(f, new Noop(m));
321 >        assertEquals(1, f.getNumberOfDependents());
322 >        assertEquals(0, g.getNumberOfDependents());
323 >        final CompletableFuture<Void> h = m.thenRun(f, new Noop(m));
324 >        assertEquals(2, f.getNumberOfDependents());
325 >        assertEquals(0, h.getNumberOfDependents());
326 >        assertTrue(f.complete(v1));
327          checkCompletedNormally(g, null);
328 <        assertEquals(f.getNumberOfDependents(), 0);
329 <        assertEquals(g.getNumberOfDependents(), 0);
330 <    }
331 <
328 >        checkCompletedNormally(h, null);
329 >        assertEquals(0, f.getNumberOfDependents());
330 >        assertEquals(0, g.getNumberOfDependents());
331 >        assertEquals(0, h.getNumberOfDependents());
332 >    }}
333  
334      /**
335       * toString indicates current completion state
# Line 266 | Line 340 | public class CompletableFutureTest exten
340          f = new CompletableFuture<String>();
341          assertTrue(f.toString().contains("[Not completed]"));
342  
343 <        f.complete("foo");
343 >        assertTrue(f.complete("foo"));
344          assertTrue(f.toString().contains("[Completed normally]"));
345  
346          f = new CompletableFuture<String>();
347 <        f.completeExceptionally(new IndexOutOfBoundsException());
347 >        assertTrue(f.completeExceptionally(new IndexOutOfBoundsException()));
348          assertTrue(f.toString().contains("[Completed exceptionally]"));
349 +
350 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
351 +            f = new CompletableFuture<String>();
352 +            assertTrue(f.cancel(mayInterruptIfRunning));
353 +            assertTrue(f.toString().contains("[Completed exceptionally]"));
354 +        }
355      }
356  
357      /**
# Line 282 | Line 362 | public class CompletableFutureTest exten
362          checkCompletedNormally(f, "test");
363      }
364  
365 <    static final Supplier<Integer> supplyOne =
366 <        () -> Integer.valueOf(1);
367 <    static final Function<Integer, Integer> inc =
368 <        (Integer x) -> Integer.valueOf(x.intValue() + 1);
369 <    static final BiFunction<Integer, Integer, Integer> add =
370 <        (Integer x, Integer y) -> Integer.valueOf(x.intValue() + y.intValue());
371 <    static final class IncAction implements Consumer<Integer> {
372 <        int value;
373 <        public void accept(Integer x) { value = x.intValue() + 1; }
365 >    abstract class CheckedAction {
366 >        int invocationCount = 0;
367 >        final ExecutionMode m;
368 >        CheckedAction(ExecutionMode m) { this.m = m; }
369 >        void invoked() {
370 >            m.checkExecutionMode();
371 >            assertEquals(0, invocationCount++);
372 >        }
373 >        void assertNotInvoked() { assertEquals(0, invocationCount); }
374 >        void assertInvoked() { assertEquals(1, invocationCount); }
375 >    }
376 >
377 >    abstract class CheckedIntegerAction extends CheckedAction {
378 >        Integer value;
379 >        CheckedIntegerAction(ExecutionMode m) { super(m); }
380 >        void assertValue(Integer expected) {
381 >            assertInvoked();
382 >            assertEquals(expected, value);
383 >        }
384 >    }
385 >
386 >    class IntegerSupplier extends CheckedAction
387 >        implements Supplier<Integer>
388 >    {
389 >        final Integer value;
390 >        IntegerSupplier(ExecutionMode m, Integer value) {
391 >            super(m);
392 >            this.value = value;
393 >        }
394 >        public Integer get() {
395 >            invoked();
396 >            return value;
397 >        }
398 >    }
399 >
400 >    // A function that handles and produces null values as well.
401 >    static Integer inc(Integer x) {
402 >        return (x == null) ? null : x + 1;
403 >    }
404 >
405 >    class NoopConsumer extends CheckedIntegerAction
406 >        implements Consumer<Integer>
407 >    {
408 >        NoopConsumer(ExecutionMode m) { super(m); }
409 >        public void accept(Integer x) {
410 >            invoked();
411 >            value = x;
412 >        }
413 >    }
414 >
415 >    class IncFunction extends CheckedIntegerAction
416 >        implements Function<Integer,Integer>
417 >    {
418 >        IncFunction(ExecutionMode m) { super(m); }
419 >        public Integer apply(Integer x) {
420 >            invoked();
421 >            return value = inc(x);
422 >        }
423      }
424 <    static final class AddAction implements BiConsumer<Integer, Integer> {
425 <        int value;
424 >
425 >    // Choose non-commutative actions for better coverage
426 >    // A non-commutative function that handles and produces null values as well.
427 >    static Integer subtract(Integer x, Integer y) {
428 >        return (x == null && y == null) ? null :
429 >            ((x == null) ? 42 : x.intValue())
430 >            - ((y == null) ? 99 : y.intValue());
431 >    }
432 >
433 >    class SubtractAction extends CheckedIntegerAction
434 >        implements BiConsumer<Integer, Integer>
435 >    {
436 >        SubtractAction(ExecutionMode m) { super(m); }
437          public void accept(Integer x, Integer y) {
438 <            value = x.intValue() + y.intValue();
438 >            invoked();
439 >            value = subtract(x, y);
440          }
441      }
442 <    static final class Noop implements Runnable {
443 <        boolean ran;
444 <        public void run() { ran = true; }
442 >
443 >    class SubtractFunction extends CheckedIntegerAction
444 >        implements BiFunction<Integer, Integer, Integer>
445 >    {
446 >        SubtractFunction(ExecutionMode m) { super(m); }
447 >        public Integer apply(Integer x, Integer y) {
448 >            invoked();
449 >            return value = subtract(x, y);
450 >        }
451      }
452  
453 <    static final class FailingSupplier implements Supplier<Integer> {
454 <        boolean ran;
455 <        public Integer get() { ran = true; throw new CFException(); }
453 >    class Noop extends CheckedAction implements Runnable {
454 >        Noop(ExecutionMode m) { super(m); }
455 >        public void run() {
456 >            invoked();
457 >        }
458      }
459 <    static final class FailingConsumer implements Consumer<Integer> {
460 <        boolean ran;
461 <        public void accept(Integer x) { ran = true; throw new CFException(); }
459 >
460 >    class FailingSupplier extends CheckedAction
461 >        implements Supplier<Integer>
462 >    {
463 >        final CFException ex;
464 >        FailingSupplier(ExecutionMode m) { super(m); ex = new CFException(); }
465 >        public Integer get() {
466 >            invoked();
467 >            throw ex;
468 >        }
469      }
470 <    static final class FailingBiConsumer implements BiConsumer<Integer, Integer> {
471 <        boolean ran;
472 <        public void accept(Integer x, Integer y) { ran = true; throw new CFException(); }
470 >
471 >    class FailingConsumer extends CheckedIntegerAction
472 >        implements Consumer<Integer>
473 >    {
474 >        final CFException ex;
475 >        FailingConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
476 >        public void accept(Integer x) {
477 >            invoked();
478 >            value = x;
479 >            throw ex;
480 >        }
481      }
482 <    static final class FailingFunction implements Function<Integer, Integer> {
483 <        boolean ran;
484 <        public Integer apply(Integer x) { ran = true; throw new CFException(); }
482 >
483 >    class FailingBiConsumer extends CheckedIntegerAction
484 >        implements BiConsumer<Integer, Integer>
485 >    {
486 >        final CFException ex;
487 >        FailingBiConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
488 >        public void accept(Integer x, Integer y) {
489 >            invoked();
490 >            value = subtract(x, y);
491 >            throw ex;
492 >        }
493      }
494 <    static final class FailingBiFunction implements BiFunction<Integer, Integer, Integer> {
495 <        boolean ran;
496 <        public Integer apply(Integer x, Integer y) { ran = true; throw new CFException(); }
494 >
495 >    class FailingFunction extends CheckedIntegerAction
496 >        implements Function<Integer, Integer>
497 >    {
498 >        final CFException ex;
499 >        FailingFunction(ExecutionMode m) { super(m); ex = new CFException(); }
500 >        public Integer apply(Integer x) {
501 >            invoked();
502 >            value = x;
503 >            throw ex;
504 >        }
505 >    }
506 >
507 >    class FailingBiFunction extends CheckedIntegerAction
508 >        implements BiFunction<Integer, Integer, Integer>
509 >    {
510 >        final CFException ex;
511 >        FailingBiFunction(ExecutionMode m) { super(m); ex = new CFException(); }
512 >        public Integer apply(Integer x, Integer y) {
513 >            invoked();
514 >            value = subtract(x, y);
515 >            throw ex;
516 >        }
517      }
518 <    static final class FailingNoop implements Runnable {
519 <        boolean ran;
520 <        public void run() { ran = true; throw new CFException(); }
518 >
519 >    class FailingRunnable extends CheckedAction implements Runnable {
520 >        final CFException ex;
521 >        FailingRunnable(ExecutionMode m) { super(m); ex = new CFException(); }
522 >        public void run() {
523 >            invoked();
524 >            throw ex;
525 >        }
526      }
527  
528 <    static final class CompletableFutureInc implements Function<Integer, CompletableFuture<Integer>> {
528 >    class CompletableFutureInc extends CheckedIntegerAction
529 >        implements Function<Integer, CompletableFuture<Integer>>
530 >    {
531 >        CompletableFutureInc(ExecutionMode m) { super(m); }
532          public CompletableFuture<Integer> apply(Integer x) {
533 <            CompletableFuture<Integer> f = new CompletableFuture<Integer>();
534 <            f.complete(Integer.valueOf(x.intValue() + 1));
533 >            invoked();
534 >            value = x;
535 >            CompletableFuture<Integer> f = new CompletableFuture<>();
536 >            assertTrue(f.complete(inc(x)));
537              return f;
538          }
539      }
540  
541 <    static final class FailingCompletableFutureFunction implements Function<Integer, CompletableFuture<Integer>> {
542 <        boolean ran;
541 >    class FailingCompletableFutureFunction extends CheckedIntegerAction
542 >        implements Function<Integer, CompletableFuture<Integer>>
543 >    {
544 >        final CFException ex;
545 >        FailingCompletableFutureFunction(ExecutionMode m) { super(m); ex = new CFException(); }
546          public CompletableFuture<Integer> apply(Integer x) {
547 <            ran = true; throw new CFException();
547 >            invoked();
548 >            value = x;
549 >            throw ex;
550          }
551      }
552  
553      // Used for explicit executor tests
554      static final class ThreadExecutor implements Executor {
555 +        final AtomicInteger count = new AtomicInteger(0);
556 +        static final ThreadGroup tg = new ThreadGroup("ThreadExecutor");
557 +        static boolean startedCurrentThread() {
558 +            return Thread.currentThread().getThreadGroup() == tg;
559 +        }
560 +
561          public void execute(Runnable r) {
562 <            new Thread(r).start();
562 >            count.getAndIncrement();
563 >            new Thread(tg, r).start();
564          }
565      }
566  
567 <    static final class ExceptionToInteger implements Function<Throwable, Integer> {
568 <        public Integer apply(Throwable x) { return Integer.valueOf(3); }
355 <    }
567 >    static final boolean defaultExecutorIsCommonPool
568 >        = ForkJoinPool.getCommonPoolParallelism() > 1;
569  
570 <    static final class IntegerHandler implements BiFunction<Integer, Throwable, Integer> {
571 <        public Integer apply(Integer x, Throwable t) {
572 <            return (t == null) ? two : three;
573 <        }
574 <    }
570 >    /**
571 >     * Permits the testing of parallel code for the 3 different
572 >     * execution modes without copy/pasting all the test methods.
573 >     */
574 >    enum ExecutionMode {
575 >        SYNC {
576 >            public void checkExecutionMode() {
577 >                assertFalse(ThreadExecutor.startedCurrentThread());
578 >                assertNull(ForkJoinTask.getPool());
579 >            }
580 >            public CompletableFuture<Void> runAsync(Runnable a) {
581 >                throw new UnsupportedOperationException();
582 >            }
583 >            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
584 >                throw new UnsupportedOperationException();
585 >            }
586 >            public <T> CompletableFuture<Void> thenRun
587 >                (CompletableFuture<T> f, Runnable a) {
588 >                return f.thenRun(a);
589 >            }
590 >            public <T> CompletableFuture<Void> thenAccept
591 >                (CompletableFuture<T> f, Consumer<? super T> a) {
592 >                return f.thenAccept(a);
593 >            }
594 >            public <T,U> CompletableFuture<U> thenApply
595 >                (CompletableFuture<T> f, Function<? super T,U> a) {
596 >                return f.thenApply(a);
597 >            }
598 >            public <T,U> CompletableFuture<U> thenCompose
599 >                (CompletableFuture<T> f,
600 >                 Function<? super T,? extends CompletionStage<U>> a) {
601 >                return f.thenCompose(a);
602 >            }
603 >            public <T,U> CompletableFuture<U> handle
604 >                (CompletableFuture<T> f,
605 >                 BiFunction<? super T,Throwable,? extends U> a) {
606 >                return f.handle(a);
607 >            }
608 >            public <T> CompletableFuture<T> whenComplete
609 >                (CompletableFuture<T> f,
610 >                 BiConsumer<? super T,? super Throwable> a) {
611 >                return f.whenComplete(a);
612 >            }
613 >            public <T,U> CompletableFuture<Void> runAfterBoth
614 >                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
615 >                return f.runAfterBoth(g, a);
616 >            }
617 >            public <T,U> CompletableFuture<Void> thenAcceptBoth
618 >                (CompletableFuture<T> f,
619 >                 CompletionStage<? extends U> g,
620 >                 BiConsumer<? super T,? super U> a) {
621 >                return f.thenAcceptBoth(g, a);
622 >            }
623 >            public <T,U,V> CompletableFuture<V> thenCombine
624 >                (CompletableFuture<T> f,
625 >                 CompletionStage<? extends U> g,
626 >                 BiFunction<? super T,? super U,? extends V> a) {
627 >                return f.thenCombine(g, a);
628 >            }
629 >            public <T> CompletableFuture<Void> runAfterEither
630 >                (CompletableFuture<T> f,
631 >                 CompletionStage<?> g,
632 >                 java.lang.Runnable a) {
633 >                return f.runAfterEither(g, a);
634 >            }
635 >            public <T> CompletableFuture<Void> acceptEither
636 >                (CompletableFuture<T> f,
637 >                 CompletionStage<? extends T> g,
638 >                 Consumer<? super T> a) {
639 >                return f.acceptEither(g, a);
640 >            }
641 >            public <T,U> CompletableFuture<U> applyToEither
642 >                (CompletableFuture<T> f,
643 >                 CompletionStage<? extends T> g,
644 >                 Function<? super T,U> a) {
645 >                return f.applyToEither(g, a);
646 >            }
647 >        },
648  
649 +        ASYNC {
650 +            public void checkExecutionMode() {
651 +                assertEquals(defaultExecutorIsCommonPool,
652 +                             (ForkJoinPool.commonPool() == ForkJoinTask.getPool()));
653 +            }
654 +            public CompletableFuture<Void> runAsync(Runnable a) {
655 +                return CompletableFuture.runAsync(a);
656 +            }
657 +            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
658 +                return CompletableFuture.supplyAsync(a);
659 +            }
660 +            public <T> CompletableFuture<Void> thenRun
661 +                (CompletableFuture<T> f, Runnable a) {
662 +                return f.thenRunAsync(a);
663 +            }
664 +            public <T> CompletableFuture<Void> thenAccept
665 +                (CompletableFuture<T> f, Consumer<? super T> a) {
666 +                return f.thenAcceptAsync(a);
667 +            }
668 +            public <T,U> CompletableFuture<U> thenApply
669 +                (CompletableFuture<T> f, Function<? super T,U> a) {
670 +                return f.thenApplyAsync(a);
671 +            }
672 +            public <T,U> CompletableFuture<U> thenCompose
673 +                (CompletableFuture<T> f,
674 +                 Function<? super T,? extends CompletionStage<U>> a) {
675 +                return f.thenComposeAsync(a);
676 +            }
677 +            public <T,U> CompletableFuture<U> handle
678 +                (CompletableFuture<T> f,
679 +                 BiFunction<? super T,Throwable,? extends U> a) {
680 +                return f.handleAsync(a);
681 +            }
682 +            public <T> CompletableFuture<T> whenComplete
683 +                (CompletableFuture<T> f,
684 +                 BiConsumer<? super T,? super Throwable> a) {
685 +                return f.whenCompleteAsync(a);
686 +            }
687 +            public <T,U> CompletableFuture<Void> runAfterBoth
688 +                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
689 +                return f.runAfterBothAsync(g, a);
690 +            }
691 +            public <T,U> CompletableFuture<Void> thenAcceptBoth
692 +                (CompletableFuture<T> f,
693 +                 CompletionStage<? extends U> g,
694 +                 BiConsumer<? super T,? super U> a) {
695 +                return f.thenAcceptBothAsync(g, a);
696 +            }
697 +            public <T,U,V> CompletableFuture<V> thenCombine
698 +                (CompletableFuture<T> f,
699 +                 CompletionStage<? extends U> g,
700 +                 BiFunction<? super T,? super U,? extends V> a) {
701 +                return f.thenCombineAsync(g, a);
702 +            }
703 +            public <T> CompletableFuture<Void> runAfterEither
704 +                (CompletableFuture<T> f,
705 +                 CompletionStage<?> g,
706 +                 java.lang.Runnable a) {
707 +                return f.runAfterEitherAsync(g, a);
708 +            }
709 +            public <T> CompletableFuture<Void> acceptEither
710 +                (CompletableFuture<T> f,
711 +                 CompletionStage<? extends T> g,
712 +                 Consumer<? super T> a) {
713 +                return f.acceptEitherAsync(g, a);
714 +            }
715 +            public <T,U> CompletableFuture<U> applyToEither
716 +                (CompletableFuture<T> f,
717 +                 CompletionStage<? extends T> g,
718 +                 Function<? super T,U> a) {
719 +                return f.applyToEitherAsync(g, a);
720 +            }
721 +        },
722 +
723 +        EXECUTOR {
724 +            public void checkExecutionMode() {
725 +                assertTrue(ThreadExecutor.startedCurrentThread());
726 +            }
727 +            public CompletableFuture<Void> runAsync(Runnable a) {
728 +                return CompletableFuture.runAsync(a, new ThreadExecutor());
729 +            }
730 +            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
731 +                return CompletableFuture.supplyAsync(a, new ThreadExecutor());
732 +            }
733 +            public <T> CompletableFuture<Void> thenRun
734 +                (CompletableFuture<T> f, Runnable a) {
735 +                return f.thenRunAsync(a, new ThreadExecutor());
736 +            }
737 +            public <T> CompletableFuture<Void> thenAccept
738 +                (CompletableFuture<T> f, Consumer<? super T> a) {
739 +                return f.thenAcceptAsync(a, new ThreadExecutor());
740 +            }
741 +            public <T,U> CompletableFuture<U> thenApply
742 +                (CompletableFuture<T> f, Function<? super T,U> a) {
743 +                return f.thenApplyAsync(a, new ThreadExecutor());
744 +            }
745 +            public <T,U> CompletableFuture<U> thenCompose
746 +                (CompletableFuture<T> f,
747 +                 Function<? super T,? extends CompletionStage<U>> a) {
748 +                return f.thenComposeAsync(a, new ThreadExecutor());
749 +            }
750 +            public <T,U> CompletableFuture<U> handle
751 +                (CompletableFuture<T> f,
752 +                 BiFunction<? super T,Throwable,? extends U> a) {
753 +                return f.handleAsync(a, new ThreadExecutor());
754 +            }
755 +            public <T> CompletableFuture<T> whenComplete
756 +                (CompletableFuture<T> f,
757 +                 BiConsumer<? super T,? super Throwable> a) {
758 +                return f.whenCompleteAsync(a, new ThreadExecutor());
759 +            }
760 +            public <T,U> CompletableFuture<Void> runAfterBoth
761 +                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
762 +                return f.runAfterBothAsync(g, a, new ThreadExecutor());
763 +            }
764 +            public <T,U> CompletableFuture<Void> thenAcceptBoth
765 +                (CompletableFuture<T> f,
766 +                 CompletionStage<? extends U> g,
767 +                 BiConsumer<? super T,? super U> a) {
768 +                return f.thenAcceptBothAsync(g, a, new ThreadExecutor());
769 +            }
770 +            public <T,U,V> CompletableFuture<V> thenCombine
771 +                (CompletableFuture<T> f,
772 +                 CompletionStage<? extends U> g,
773 +                 BiFunction<? super T,? super U,? extends V> a) {
774 +                return f.thenCombineAsync(g, a, new ThreadExecutor());
775 +            }
776 +            public <T> CompletableFuture<Void> runAfterEither
777 +                (CompletableFuture<T> f,
778 +                 CompletionStage<?> g,
779 +                 java.lang.Runnable a) {
780 +                return f.runAfterEitherAsync(g, a, new ThreadExecutor());
781 +            }
782 +            public <T> CompletableFuture<Void> acceptEither
783 +                (CompletableFuture<T> f,
784 +                 CompletionStage<? extends T> g,
785 +                 Consumer<? super T> a) {
786 +                return f.acceptEitherAsync(g, a, new ThreadExecutor());
787 +            }
788 +            public <T,U> CompletableFuture<U> applyToEither
789 +                (CompletableFuture<T> f,
790 +                 CompletionStage<? extends T> g,
791 +                 Function<? super T,U> a) {
792 +                return f.applyToEitherAsync(g, a, new ThreadExecutor());
793 +            }
794 +        };
795 +
796 +        public abstract void checkExecutionMode();
797 +        public abstract CompletableFuture<Void> runAsync(Runnable a);
798 +        public abstract <U> CompletableFuture<U> supplyAsync(Supplier<U> a);
799 +        public abstract <T> CompletableFuture<Void> thenRun
800 +            (CompletableFuture<T> f, Runnable a);
801 +        public abstract <T> CompletableFuture<Void> thenAccept
802 +            (CompletableFuture<T> f, Consumer<? super T> a);
803 +        public abstract <T,U> CompletableFuture<U> thenApply
804 +            (CompletableFuture<T> f, Function<? super T,U> a);
805 +        public abstract <T,U> CompletableFuture<U> thenCompose
806 +            (CompletableFuture<T> f,
807 +             Function<? super T,? extends CompletionStage<U>> a);
808 +        public abstract <T,U> CompletableFuture<U> handle
809 +            (CompletableFuture<T> f,
810 +             BiFunction<? super T,Throwable,? extends U> a);
811 +        public abstract <T> CompletableFuture<T> whenComplete
812 +            (CompletableFuture<T> f,
813 +             BiConsumer<? super T,? super Throwable> a);
814 +        public abstract <T,U> CompletableFuture<Void> runAfterBoth
815 +            (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a);
816 +        public abstract <T,U> CompletableFuture<Void> thenAcceptBoth
817 +            (CompletableFuture<T> f,
818 +             CompletionStage<? extends U> g,
819 +             BiConsumer<? super T,? super U> a);
820 +        public abstract <T,U,V> CompletableFuture<V> thenCombine
821 +            (CompletableFuture<T> f,
822 +             CompletionStage<? extends U> g,
823 +             BiFunction<? super T,? super U,? extends V> a);
824 +        public abstract <T> CompletableFuture<Void> runAfterEither
825 +            (CompletableFuture<T> f,
826 +             CompletionStage<?> g,
827 +             java.lang.Runnable a);
828 +        public abstract <T> CompletableFuture<Void> acceptEither
829 +            (CompletableFuture<T> f,
830 +             CompletionStage<? extends T> g,
831 +             Consumer<? super T> a);
832 +        public abstract <T,U> CompletableFuture<U> applyToEither
833 +            (CompletableFuture<T> f,
834 +             CompletionStage<? extends T> g,
835 +             Function<? super T,U> a);
836 +    }
837 +
838 +    /**
839 +     * exceptionally action is not invoked when source completes
840 +     * normally, and source result is propagated
841 +     */
842 +    public void testExceptionally_normalCompletion() {
843 +        for (boolean createIncomplete : new boolean[] { true, false })
844 +        for (Integer v1 : new Integer[] { 1, null })
845 +    {
846 +        final AtomicInteger a = new AtomicInteger(0);
847 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
848 +        if (!createIncomplete) assertTrue(f.complete(v1));
849 +        final CompletableFuture<Integer> g = f.exceptionally
850 +            ((Throwable t) -> {
851 +                a.getAndIncrement();
852 +                threadFail("should not be called");
853 +                return null;            // unreached
854 +            });
855 +        if (createIncomplete) assertTrue(f.complete(v1));
856 +
857 +        checkCompletedNormally(g, v1);
858 +        checkCompletedNormally(f, v1);
859 +        assertEquals(0, a.get());
860 +    }}
861  
862      /**
863       * exceptionally action completes with function value on source
864 <     * exception;  otherwise with source value
864 >     * exception
865       */
866 <    public void testExceptionally() {
867 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
868 <        ExceptionToInteger r = new ExceptionToInteger();
869 <        CompletableFuture<Integer> g = f.exceptionally(r);
870 <        f.completeExceptionally(new CFException());
871 <        checkCompletedNormally(g, three);
866 >    public void testExceptionally_exceptionalCompletion() {
867 >        for (boolean createIncomplete : new boolean[] { true, false })
868 >        for (Integer v1 : new Integer[] { 1, null })
869 >    {
870 >        final AtomicInteger a = new AtomicInteger(0);
871 >        final CFException ex = new CFException();
872 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
873 >        if (!createIncomplete) f.completeExceptionally(ex);
874 >        final CompletableFuture<Integer> g = f.exceptionally
875 >            ((Throwable t) -> {
876 >                ExecutionMode.SYNC.checkExecutionMode();
877 >                threadAssertSame(t, ex);
878 >                a.getAndIncrement();
879 >                return v1;
880 >            });
881 >        if (createIncomplete) f.completeExceptionally(ex);
882 >
883 >        checkCompletedNormally(g, v1);
884 >        assertEquals(1, a.get());
885 >    }}
886 >
887 >    /**
888 >     * If an "exceptionally action" throws an exception, it completes
889 >     * exceptionally with that exception
890 >     */
891 >    public void testExceptionally_exceptionalCompletionActionFailed() {
892 >        for (boolean createIncomplete : new boolean[] { true, false })
893 >    {
894 >        final AtomicInteger a = new AtomicInteger(0);
895 >        final CFException ex1 = new CFException();
896 >        final CFException ex2 = new CFException();
897 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
898 >        if (!createIncomplete) f.completeExceptionally(ex1);
899 >        final CompletableFuture<Integer> g = f.exceptionally
900 >            ((Throwable t) -> {
901 >                ExecutionMode.SYNC.checkExecutionMode();
902 >                threadAssertSame(t, ex1);
903 >                a.getAndIncrement();
904 >                throw ex2;
905 >            });
906 >        if (createIncomplete) f.completeExceptionally(ex1);
907 >
908 >        checkCompletedWithWrappedException(g, ex2);
909 >        checkCompletedExceptionally(f, ex1);
910 >        assertEquals(1, a.get());
911 >    }}
912 >
913 >    /**
914 >     * whenComplete action executes on normal completion, propagating
915 >     * source result.
916 >     */
917 >    public void testWhenComplete_normalCompletion() {
918 >        for (ExecutionMode m : ExecutionMode.values())
919 >        for (boolean createIncomplete : new boolean[] { true, false })
920 >        for (Integer v1 : new Integer[] { 1, null })
921 >    {
922 >        final AtomicInteger a = new AtomicInteger(0);
923 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
924 >        if (!createIncomplete) assertTrue(f.complete(v1));
925 >        final CompletableFuture<Integer> g = m.whenComplete
926 >            (f,
927 >             (Integer result, Throwable t) -> {
928 >                m.checkExecutionMode();
929 >                threadAssertSame(result, v1);
930 >                threadAssertNull(t);
931 >                a.getAndIncrement();
932 >            });
933 >        if (createIncomplete) assertTrue(f.complete(v1));
934 >
935 >        checkCompletedNormally(g, v1);
936 >        checkCompletedNormally(f, v1);
937 >        assertEquals(1, a.get());
938 >    }}
939 >
940 >    /**
941 >     * whenComplete action executes on exceptional completion, propagating
942 >     * source result.
943 >     */
944 >    public void testWhenComplete_exceptionalCompletion() {
945 >        for (ExecutionMode m : ExecutionMode.values())
946 >        for (boolean createIncomplete : new boolean[] { true, false })
947 >    {
948 >        final AtomicInteger a = new AtomicInteger(0);
949 >        final CFException ex = new CFException();
950 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
951 >        if (!createIncomplete) f.completeExceptionally(ex);
952 >        final CompletableFuture<Integer> g = m.whenComplete
953 >            (f,
954 >             (Integer result, Throwable t) -> {
955 >                m.checkExecutionMode();
956 >                threadAssertNull(result);
957 >                threadAssertSame(t, ex);
958 >                a.getAndIncrement();
959 >            });
960 >        if (createIncomplete) f.completeExceptionally(ex);
961 >
962 >        checkCompletedWithWrappedException(g, ex);
963 >        checkCompletedExceptionally(f, ex);
964 >        assertEquals(1, a.get());
965 >    }}
966 >
967 >    /**
968 >     * whenComplete action executes on cancelled source, propagating
969 >     * CancellationException.
970 >     */
971 >    public void testWhenComplete_sourceCancelled() {
972 >        for (ExecutionMode m : ExecutionMode.values())
973 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
974 >        for (boolean createIncomplete : new boolean[] { true, false })
975 >    {
976 >        final AtomicInteger a = new AtomicInteger(0);
977 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
978 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
979 >        final CompletableFuture<Integer> g = m.whenComplete
980 >            (f,
981 >             (Integer result, Throwable t) -> {
982 >                m.checkExecutionMode();
983 >                threadAssertNull(result);
984 >                threadAssertTrue(t instanceof CancellationException);
985 >                a.getAndIncrement();
986 >            });
987 >        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
988  
989 <        f = new CompletableFuture<Integer>();
990 <        r = new ExceptionToInteger();
991 <        g = f.exceptionally(r);
992 <        f.complete(one);
379 <        checkCompletedNormally(g, one);
380 <    }
989 >        checkCompletedWithWrappedCancellationException(g);
990 >        checkCancelled(f);
991 >        assertEquals(1, a.get());
992 >    }}
993  
994      /**
995 <     * handle action completes normally with function value on either
996 <     * normal or exceptional completion of source
995 >     * If a whenComplete action throws an exception when triggered by
996 >     * a normal completion, it completes exceptionally
997       */
998 <    public void testHandle() {
999 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1000 <        IntegerHandler r = new IntegerHandler();
1001 <        CompletableFuture<Integer> g = f.handle(r);
1002 <        f.completeExceptionally(new CFException());
1003 <        checkCompletedNormally(g, three);
998 >    public void testWhenComplete_sourceCompletedNormallyActionFailed() {
999 >        for (boolean createIncomplete : new boolean[] { true, false })
1000 >        for (ExecutionMode m : ExecutionMode.values())
1001 >        for (Integer v1 : new Integer[] { 1, null })
1002 >    {
1003 >        final AtomicInteger a = new AtomicInteger(0);
1004 >        final CFException ex = new CFException();
1005 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1006 >        if (!createIncomplete) assertTrue(f.complete(v1));
1007 >        final CompletableFuture<Integer> g = m.whenComplete
1008 >            (f,
1009 >             (Integer result, Throwable t) -> {
1010 >                m.checkExecutionMode();
1011 >                threadAssertSame(result, v1);
1012 >                threadAssertNull(t);
1013 >                a.getAndIncrement();
1014 >                throw ex;
1015 >            });
1016 >        if (createIncomplete) assertTrue(f.complete(v1));
1017 >
1018 >        checkCompletedWithWrappedException(g, ex);
1019 >        checkCompletedNormally(f, v1);
1020 >        assertEquals(1, a.get());
1021 >    }}
1022 >
1023 >    /**
1024 >     * If a whenComplete action throws an exception when triggered by
1025 >     * a source completion that also throws an exception, the source
1026 >     * exception takes precedence (unlike handle)
1027 >     */
1028 >    public void testWhenComplete_sourceFailedActionFailed() {
1029 >        for (boolean createIncomplete : new boolean[] { true, false })
1030 >        for (ExecutionMode m : ExecutionMode.values())
1031 >    {
1032 >        final AtomicInteger a = new AtomicInteger(0);
1033 >        final CFException ex1 = new CFException();
1034 >        final CFException ex2 = new CFException();
1035 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1036 >
1037 >        if (!createIncomplete) f.completeExceptionally(ex1);
1038 >        final CompletableFuture<Integer> g = m.whenComplete
1039 >            (f,
1040 >             (Integer result, Throwable t) -> {
1041 >                m.checkExecutionMode();
1042 >                threadAssertSame(t, ex1);
1043 >                threadAssertNull(result);
1044 >                a.getAndIncrement();
1045 >                throw ex2;
1046 >            });
1047 >        if (createIncomplete) f.completeExceptionally(ex1);
1048 >
1049 >        checkCompletedWithWrappedException(g, ex1);
1050 >        checkCompletedExceptionally(f, ex1);
1051 >        if (testImplementationDetails) {
1052 >            assertEquals(1, ex1.getSuppressed().length);
1053 >            assertSame(ex2, ex1.getSuppressed()[0]);
1054 >        }
1055 >        assertEquals(1, a.get());
1056 >    }}
1057  
1058 <        f = new CompletableFuture<Integer>();
1059 <        r = new IntegerHandler();
1060 <        g = f.handle(r);
1061 <        f.complete(one);
1062 <        checkCompletedNormally(g, two);
1063 <    }
1058 >    /**
1059 >     * handle action completes normally with function value on normal
1060 >     * completion of source
1061 >     */
1062 >    public void testHandle_normalCompletion() {
1063 >        for (ExecutionMode m : ExecutionMode.values())
1064 >        for (boolean createIncomplete : new boolean[] { true, false })
1065 >        for (Integer v1 : new Integer[] { 1, null })
1066 >    {
1067 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1068 >        final AtomicInteger a = new AtomicInteger(0);
1069 >        if (!createIncomplete) assertTrue(f.complete(v1));
1070 >        final CompletableFuture<Integer> g = m.handle
1071 >            (f,
1072 >             (Integer result, Throwable t) -> {
1073 >                m.checkExecutionMode();
1074 >                threadAssertSame(result, v1);
1075 >                threadAssertNull(t);
1076 >                a.getAndIncrement();
1077 >                return inc(v1);
1078 >            });
1079 >        if (createIncomplete) assertTrue(f.complete(v1));
1080 >
1081 >        checkCompletedNormally(g, inc(v1));
1082 >        checkCompletedNormally(f, v1);
1083 >        assertEquals(1, a.get());
1084 >    }}
1085  
1086      /**
1087 <     * runAsync completes after running Runnable
1087 >     * handle action completes normally with function value on
1088 >     * exceptional completion of source
1089       */
1090 <    public void testRunAsync() {
1091 <        Noop r = new Noop();
1092 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r);
1093 <        assertNull(f.join());
1094 <        assertTrue(r.ran);
1095 <        checkCompletedNormally(f, null);
1096 <    }
1090 >    public void testHandle_exceptionalCompletion() {
1091 >        for (ExecutionMode m : ExecutionMode.values())
1092 >        for (boolean createIncomplete : new boolean[] { true, false })
1093 >        for (Integer v1 : new Integer[] { 1, null })
1094 >    {
1095 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1096 >        final AtomicInteger a = new AtomicInteger(0);
1097 >        final CFException ex = new CFException();
1098 >        if (!createIncomplete) f.completeExceptionally(ex);
1099 >        final CompletableFuture<Integer> g = m.handle
1100 >            (f,
1101 >             (Integer result, Throwable t) -> {
1102 >                m.checkExecutionMode();
1103 >                threadAssertNull(result);
1104 >                threadAssertSame(t, ex);
1105 >                a.getAndIncrement();
1106 >                return v1;
1107 >            });
1108 >        if (createIncomplete) f.completeExceptionally(ex);
1109 >
1110 >        checkCompletedNormally(g, v1);
1111 >        checkCompletedExceptionally(f, ex);
1112 >        assertEquals(1, a.get());
1113 >    }}
1114 >
1115 >    /**
1116 >     * handle action completes normally with function value on
1117 >     * cancelled source
1118 >     */
1119 >    public void testHandle_sourceCancelled() {
1120 >        for (ExecutionMode m : ExecutionMode.values())
1121 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1122 >        for (boolean createIncomplete : new boolean[] { true, false })
1123 >        for (Integer v1 : new Integer[] { 1, null })
1124 >    {
1125 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1126 >        final AtomicInteger a = new AtomicInteger(0);
1127 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1128 >        final CompletableFuture<Integer> g = m.handle
1129 >            (f,
1130 >             (Integer result, Throwable t) -> {
1131 >                m.checkExecutionMode();
1132 >                threadAssertNull(result);
1133 >                threadAssertTrue(t instanceof CancellationException);
1134 >                a.getAndIncrement();
1135 >                return v1;
1136 >            });
1137 >        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1138 >
1139 >        checkCompletedNormally(g, v1);
1140 >        checkCancelled(f);
1141 >        assertEquals(1, a.get());
1142 >    }}
1143  
1144      /**
1145 <     * runAsync with executor completes after running Runnable
1145 >     * If a "handle action" throws an exception when triggered by
1146 >     * a normal completion, it completes exceptionally
1147       */
1148 <    public void testRunAsync2() {
1149 <        Noop r = new Noop();
1150 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r, new ThreadExecutor());
1148 >    public void testHandle_sourceCompletedNormallyActionFailed() {
1149 >        for (ExecutionMode m : ExecutionMode.values())
1150 >        for (boolean createIncomplete : new boolean[] { true, false })
1151 >        for (Integer v1 : new Integer[] { 1, null })
1152 >    {
1153 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1154 >        final AtomicInteger a = new AtomicInteger(0);
1155 >        final CFException ex = new CFException();
1156 >        if (!createIncomplete) assertTrue(f.complete(v1));
1157 >        final CompletableFuture<Integer> g = m.handle
1158 >            (f,
1159 >             (Integer result, Throwable t) -> {
1160 >                m.checkExecutionMode();
1161 >                threadAssertSame(result, v1);
1162 >                threadAssertNull(t);
1163 >                a.getAndIncrement();
1164 >                throw ex;
1165 >            });
1166 >        if (createIncomplete) assertTrue(f.complete(v1));
1167 >
1168 >        checkCompletedWithWrappedException(g, ex);
1169 >        checkCompletedNormally(f, v1);
1170 >        assertEquals(1, a.get());
1171 >    }}
1172 >
1173 >    /**
1174 >     * If a "handle action" throws an exception when triggered by
1175 >     * a source completion that also throws an exception, the action
1176 >     * exception takes precedence (unlike whenComplete)
1177 >     */
1178 >    public void testHandle_sourceFailedActionFailed() {
1179 >        for (boolean createIncomplete : new boolean[] { true, false })
1180 >        for (ExecutionMode m : ExecutionMode.values())
1181 >    {
1182 >        final AtomicInteger a = new AtomicInteger(0);
1183 >        final CFException ex1 = new CFException();
1184 >        final CFException ex2 = new CFException();
1185 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1186 >
1187 >        if (!createIncomplete) f.completeExceptionally(ex1);
1188 >        final CompletableFuture<Integer> g = m.handle
1189 >            (f,
1190 >             (Integer result, Throwable t) -> {
1191 >                m.checkExecutionMode();
1192 >                threadAssertNull(result);
1193 >                threadAssertSame(ex1, t);
1194 >                a.getAndIncrement();
1195 >                throw ex2;
1196 >            });
1197 >        if (createIncomplete) f.completeExceptionally(ex1);
1198 >
1199 >        checkCompletedWithWrappedException(g, ex2);
1200 >        checkCompletedExceptionally(f, ex1);
1201 >        assertEquals(1, a.get());
1202 >    }}
1203 >
1204 >    /**
1205 >     * runAsync completes after running Runnable
1206 >     */
1207 >    public void testRunAsync_normalCompletion() {
1208 >        ExecutionMode[] executionModes = {
1209 >            ExecutionMode.ASYNC,
1210 >            ExecutionMode.EXECUTOR,
1211 >        };
1212 >        for (ExecutionMode m : executionModes)
1213 >    {
1214 >        final Noop r = new Noop(m);
1215 >        final CompletableFuture<Void> f = m.runAsync(r);
1216          assertNull(f.join());
418        assertTrue(r.ran);
1217          checkCompletedNormally(f, null);
1218 <    }
1218 >        r.assertInvoked();
1219 >    }}
1220  
1221      /**
1222       * failing runAsync completes exceptionally after running Runnable
1223       */
1224 <    public void testRunAsync3() {
1225 <        FailingNoop r = new FailingNoop();
1226 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r);
1227 <        checkCompletedWithWrappedCFException(f);
1228 <        assertTrue(r.ran);
1229 <    }
1224 >    public void testRunAsync_exceptionalCompletion() {
1225 >        ExecutionMode[] executionModes = {
1226 >            ExecutionMode.ASYNC,
1227 >            ExecutionMode.EXECUTOR,
1228 >        };
1229 >        for (ExecutionMode m : executionModes)
1230 >    {
1231 >        final FailingRunnable r = new FailingRunnable(m);
1232 >        final CompletableFuture<Void> f = m.runAsync(r);
1233 >        checkCompletedWithWrappedException(f, r.ex);
1234 >        r.assertInvoked();
1235 >    }}
1236  
1237      /**
1238       * supplyAsync completes with result of supplier
1239       */
1240 <    public void testSupplyAsync() {
1241 <        CompletableFuture<Integer> f = CompletableFuture.supplyAsync(supplyOne);
1242 <        assertEquals(f.join(), one);
1243 <    }
1244 <
1245 <    /**
1246 <     * supplyAsync with executor completes with result of supplier
1247 <     */
1248 <    public void testSupplyAsync2() {
1249 <        CompletableFuture<Integer> f = CompletableFuture.supplyAsync(supplyOne, new ThreadExecutor());
1250 <        assertEquals(f.join(), one);
1251 <    }
1240 >    public void testSupplyAsync_normalCompletion() {
1241 >        ExecutionMode[] executionModes = {
1242 >            ExecutionMode.ASYNC,
1243 >            ExecutionMode.EXECUTOR,
1244 >        };
1245 >        for (ExecutionMode m : executionModes)
1246 >        for (Integer v1 : new Integer[] { 1, null })
1247 >    {
1248 >        final IntegerSupplier r = new IntegerSupplier(m, v1);
1249 >        final CompletableFuture<Integer> f = m.supplyAsync(r);
1250 >        assertSame(v1, f.join());
1251 >        checkCompletedNormally(f, v1);
1252 >        r.assertInvoked();
1253 >    }}
1254  
1255      /**
1256       * Failing supplyAsync completes exceptionally
1257       */
1258 <    public void testSupplyAsync3() {
1259 <        FailingSupplier r = new FailingSupplier();
1260 <        CompletableFuture<Integer> f = CompletableFuture.supplyAsync(r);
1261 <        checkCompletedWithWrappedCFException(f);
1262 <        assertTrue(r.ran);
1263 <    }
1258 >    public void testSupplyAsync_exceptionalCompletion() {
1259 >        ExecutionMode[] executionModes = {
1260 >            ExecutionMode.ASYNC,
1261 >            ExecutionMode.EXECUTOR,
1262 >        };
1263 >        for (ExecutionMode m : executionModes)
1264 >    {
1265 >        FailingSupplier r = new FailingSupplier(m);
1266 >        CompletableFuture<Integer> f = m.supplyAsync(r);
1267 >        checkCompletedWithWrappedException(f, r.ex);
1268 >        r.assertInvoked();
1269 >    }}
1270  
1271      // seq completion methods
1272  
1273      /**
1274       * thenRun result completes normally after normal completion of source
1275       */
1276 <    public void testThenRun() {
1277 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1278 <        Noop r = new Noop();
1279 <        CompletableFuture<Void> g = f.thenRun(r);
1280 <        f.complete(null);
1281 <        checkCompletedNormally(g, null);
1282 <        // reordered version
1283 <        f = new CompletableFuture<Integer>();
1284 <        f.complete(null);
1285 <        r = new Noop();
1286 <        g = f.thenRun(r);
1287 <        checkCompletedNormally(g, null);
1288 <    }
1276 >    public void testThenRun_normalCompletion() {
1277 >        for (ExecutionMode m : ExecutionMode.values())
1278 >        for (Integer v1 : new Integer[] { 1, null })
1279 >    {
1280 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1281 >        final Noop[] rs = new Noop[6];
1282 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1283 >
1284 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1285 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1286 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1287 >        checkIncomplete(h0);
1288 >        checkIncomplete(h1);
1289 >        checkIncomplete(h2);
1290 >        assertTrue(f.complete(v1));
1291 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1292 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1293 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1294 >
1295 >        checkCompletedNormally(h0, null);
1296 >        checkCompletedNormally(h1, null);
1297 >        checkCompletedNormally(h2, null);
1298 >        checkCompletedNormally(h3, null);
1299 >        checkCompletedNormally(h4, null);
1300 >        checkCompletedNormally(h5, null);
1301 >        checkCompletedNormally(f, v1);
1302 >        for (Noop r : rs) r.assertInvoked();
1303 >    }}
1304  
1305      /**
1306       * thenRun result completes exceptionally after exceptional
1307       * completion of source
1308       */
1309 <    public void testThenRun2() {
1310 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1311 <        Noop r = new Noop();
1312 <        CompletableFuture<Void> g = f.thenRun(r);
1313 <        f.completeExceptionally(new CFException());
1314 <        checkCompletedWithWrappedCFException(g);
1315 <    }
1309 >    public void testThenRun_exceptionalCompletion() {
1310 >        for (ExecutionMode m : ExecutionMode.values())
1311 >    {
1312 >        final CFException ex = new CFException();
1313 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1314 >        final Noop[] rs = new Noop[6];
1315 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1316 >
1317 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1318 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1319 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1320 >        checkIncomplete(h0);
1321 >        checkIncomplete(h1);
1322 >        checkIncomplete(h2);
1323 >        assertTrue(f.completeExceptionally(ex));
1324 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1325 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1326 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1327 >
1328 >        checkCompletedWithWrappedException(h0, ex);
1329 >        checkCompletedWithWrappedException(h1, ex);
1330 >        checkCompletedWithWrappedException(h2, ex);
1331 >        checkCompletedWithWrappedException(h3, ex);
1332 >        checkCompletedWithWrappedException(h4, ex);
1333 >        checkCompletedWithWrappedException(h5, ex);
1334 >        checkCompletedExceptionally(f, ex);
1335 >        for (Noop r : rs) r.assertNotInvoked();
1336 >    }}
1337  
1338      /**
1339 <     * thenRun result completes exceptionally if action does
1339 >     * thenRun result completes exceptionally if source cancelled
1340       */
1341 <    public void testThenRun3() {
1342 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1343 <        FailingNoop r = new FailingNoop();
1344 <        CompletableFuture<Void> g = f.thenRun(r);
1345 <        f.complete(null);
1346 <        checkCompletedWithWrappedCFException(g);
1347 <    }
1341 >    public void testThenRun_sourceCancelled() {
1342 >        for (ExecutionMode m : ExecutionMode.values())
1343 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1344 >    {
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.cancel(mayInterruptIfRunning));
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 >        checkCompletedWithWrappedCancellationException(h0);
1361 >        checkCompletedWithWrappedCancellationException(h1);
1362 >        checkCompletedWithWrappedCancellationException(h2);
1363 >        checkCompletedWithWrappedCancellationException(h3);
1364 >        checkCompletedWithWrappedCancellationException(h4);
1365 >        checkCompletedWithWrappedCancellationException(h5);
1366 >        checkCancelled(f);
1367 >        for (Noop r : rs) r.assertNotInvoked();
1368 >    }}
1369  
1370      /**
1371 <     * thenRun result completes exceptionally if source cancelled
1371 >     * thenRun result completes exceptionally if action does
1372       */
1373 <    public void testThenRun4() {
1374 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1375 <        Noop r = new Noop();
1376 <        CompletableFuture<Void> g = f.thenRun(r);
1377 <        assertTrue(f.cancel(true));
1378 <        checkCompletedWithWrappedCancellationException(g);
1379 <    }
1373 >    public void testThenRun_actionFailed() {
1374 >        for (ExecutionMode m : ExecutionMode.values())
1375 >        for (Integer v1 : new Integer[] { 1, null })
1376 >    {
1377 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1378 >        final FailingRunnable[] rs = new FailingRunnable[6];
1379 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(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 >        assertTrue(f.complete(v1));
1385 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1386 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1387 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1388 >
1389 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1390 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1391 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1392 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1393 >        checkCompletedWithWrappedException(h4, rs[4].ex);
1394 >        checkCompletedWithWrappedException(h5, rs[5].ex);
1395 >        checkCompletedNormally(f, v1);
1396 >    }}
1397  
1398      /**
1399       * thenApply result completes normally after normal completion of source
1400       */
1401 <    public void testThenApply() {
1402 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1403 <        CompletableFuture<Integer> g = f.thenApply(inc);
1404 <        f.complete(one);
1405 <        checkCompletedNormally(g, two);
1406 <    }
1401 >    public void testThenApply_normalCompletion() {
1402 >        for (ExecutionMode m : ExecutionMode.values())
1403 >        for (Integer v1 : new Integer[] { 1, null })
1404 >    {
1405 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1406 >        final IncFunction[] rs = new IncFunction[4];
1407 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1408 >
1409 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1410 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1411 >        checkIncomplete(h0);
1412 >        checkIncomplete(h1);
1413 >        assertTrue(f.complete(v1));
1414 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1415 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1416 >
1417 >        checkCompletedNormally(h0, inc(v1));
1418 >        checkCompletedNormally(h1, inc(v1));
1419 >        checkCompletedNormally(h2, inc(v1));
1420 >        checkCompletedNormally(h3, inc(v1));
1421 >        checkCompletedNormally(f, v1);
1422 >        for (IncFunction r : rs) r.assertValue(inc(v1));
1423 >    }}
1424  
1425      /**
1426       * thenApply result completes exceptionally after exceptional
1427       * completion of source
1428       */
1429 <    public void testThenApply2() {
1430 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1431 <        CompletableFuture<Integer> g = f.thenApply(inc);
1432 <        f.completeExceptionally(new CFException());
1433 <        checkCompletedWithWrappedCFException(g);
1434 <    }
1429 >    public void testThenApply_exceptionalCompletion() {
1430 >        for (ExecutionMode m : ExecutionMode.values())
1431 >    {
1432 >        final CFException ex = new CFException();
1433 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1434 >        final IncFunction[] rs = new IncFunction[4];
1435 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1436 >
1437 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1438 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1439 >        assertTrue(f.completeExceptionally(ex));
1440 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1441 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1442 >
1443 >        checkCompletedWithWrappedException(h0, ex);
1444 >        checkCompletedWithWrappedException(h1, ex);
1445 >        checkCompletedWithWrappedException(h2, ex);
1446 >        checkCompletedWithWrappedException(h3, ex);
1447 >        checkCompletedExceptionally(f, ex);
1448 >        for (IncFunction r : rs) r.assertNotInvoked();
1449 >    }}
1450  
1451      /**
1452 <     * thenApply result completes exceptionally if action does
1452 >     * thenApply result completes exceptionally if source cancelled
1453       */
1454 <    public void testThenApply3() {
1455 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1456 <        CompletableFuture<Integer> g = f.thenApply(new FailingFunction());
1457 <        f.complete(one);
1458 <        checkCompletedWithWrappedCFException(g);
1459 <    }
1454 >    public void testThenApply_sourceCancelled() {
1455 >        for (ExecutionMode m : ExecutionMode.values())
1456 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1457 >    {
1458 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1459 >        final IncFunction[] rs = new IncFunction[4];
1460 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1461 >
1462 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1463 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1464 >        assertTrue(f.cancel(mayInterruptIfRunning));
1465 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1466 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1467 >
1468 >        checkCompletedWithWrappedCancellationException(h0);
1469 >        checkCompletedWithWrappedCancellationException(h1);
1470 >        checkCompletedWithWrappedCancellationException(h2);
1471 >        checkCompletedWithWrappedCancellationException(h3);
1472 >        checkCancelled(f);
1473 >        for (IncFunction r : rs) r.assertNotInvoked();
1474 >    }}
1475  
1476      /**
1477 <     * thenApply result completes exceptionally if source cancelled
1477 >     * thenApply result completes exceptionally if action does
1478       */
1479 <    public void testThenApply4() {
1480 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1481 <        CompletableFuture<Integer> g = f.thenApply(inc);
1482 <        assertTrue(f.cancel(true));
1483 <        checkCompletedWithWrappedCancellationException(g);
1484 <    }
1479 >    public void testThenApply_actionFailed() {
1480 >        for (ExecutionMode m : ExecutionMode.values())
1481 >        for (Integer v1 : new Integer[] { 1, null })
1482 >    {
1483 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1484 >        final FailingFunction[] rs = new FailingFunction[4];
1485 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
1486 >
1487 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1488 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1489 >        assertTrue(f.complete(v1));
1490 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1491 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1492 >
1493 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1494 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1495 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1496 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1497 >        checkCompletedNormally(f, v1);
1498 >    }}
1499  
1500      /**
1501       * thenAccept result completes normally after normal completion of source
1502       */
1503 <    public void testThenAccept() {
1504 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1505 <        IncAction r = new IncAction();
1506 <        CompletableFuture<Void> g = f.thenAccept(r);
1507 <        f.complete(one);
1508 <        checkCompletedNormally(g, null);
1509 <        assertEquals(r.value, 2);
1510 <    }
1503 >    public void testThenAccept_normalCompletion() {
1504 >        for (ExecutionMode m : ExecutionMode.values())
1505 >        for (Integer v1 : new Integer[] { 1, null })
1506 >    {
1507 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1508 >        final NoopConsumer[] rs = new NoopConsumer[4];
1509 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1510 >
1511 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1512 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1513 >        checkIncomplete(h0);
1514 >        checkIncomplete(h1);
1515 >        assertTrue(f.complete(v1));
1516 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1517 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1518 >
1519 >        checkCompletedNormally(h0, null);
1520 >        checkCompletedNormally(h1, null);
1521 >        checkCompletedNormally(h2, null);
1522 >        checkCompletedNormally(h3, null);
1523 >        checkCompletedNormally(f, v1);
1524 >        for (NoopConsumer r : rs) r.assertValue(v1);
1525 >    }}
1526  
1527      /**
1528       * thenAccept result completes exceptionally after exceptional
1529       * completion of source
1530       */
1531 <    public void testThenAccept2() {
1532 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1533 <        IncAction r = new IncAction();
1534 <        CompletableFuture<Void> g = f.thenAccept(r);
1535 <        f.completeExceptionally(new CFException());
1536 <        checkCompletedWithWrappedCFException(g);
1537 <    }
1538 <
1539 <    /**
1540 <     * thenAccept result completes exceptionally if action does
1541 <     */
1542 <    public void testThenAccept3() {
1543 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1544 <        FailingConsumer r = new FailingConsumer();
1545 <        CompletableFuture<Void> g = f.thenAccept(r);
1546 <        f.complete(one);
1547 <        checkCompletedWithWrappedCFException(g);
1548 <        assertTrue(r.ran);
1549 <    }
1531 >    public void testThenAccept_exceptionalCompletion() {
1532 >        for (ExecutionMode m : ExecutionMode.values())
1533 >    {
1534 >        final CFException ex = new CFException();
1535 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1536 >        final NoopConsumer[] rs = new NoopConsumer[4];
1537 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1538 >
1539 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1540 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1541 >        assertTrue(f.completeExceptionally(ex));
1542 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1543 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1544 >
1545 >        checkCompletedWithWrappedException(h0, ex);
1546 >        checkCompletedWithWrappedException(h1, ex);
1547 >        checkCompletedWithWrappedException(h2, ex);
1548 >        checkCompletedWithWrappedException(h3, ex);
1549 >        checkCompletedExceptionally(f, ex);
1550 >        for (NoopConsumer r : rs) r.assertNotInvoked();
1551 >    }}
1552  
1553      /**
1554       * thenAccept result completes exceptionally if source cancelled
1555       */
1556 <    public void testThenAccept4() {
1557 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1558 <        IncAction r = new IncAction();
1559 <        CompletableFuture<Void> g = f.thenAccept(r);
1560 <        assertTrue(f.cancel(true));
1561 <        checkCompletedWithWrappedCancellationException(g);
1562 <    }
1563 <
1556 >    public void testThenAccept_sourceCancelled() {
1557 >        for (ExecutionMode m : ExecutionMode.values())
1558 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1559 >    {
1560 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1561 >        final NoopConsumer[] rs = new NoopConsumer[4];
1562 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1563 >
1564 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1565 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1566 >        assertTrue(f.cancel(mayInterruptIfRunning));
1567 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1568 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1569 >
1570 >        checkCompletedWithWrappedCancellationException(h0);
1571 >        checkCompletedWithWrappedCancellationException(h1);
1572 >        checkCompletedWithWrappedCancellationException(h2);
1573 >        checkCompletedWithWrappedCancellationException(h3);
1574 >        checkCancelled(f);
1575 >        for (NoopConsumer r : rs) r.assertNotInvoked();
1576 >    }}
1577  
1578      /**
1579 <     * thenCombine result completes normally after normal completion of sources
1579 >     * thenAccept result completes exceptionally if action does
1580       */
1581 <    public void testThenCombine() {
1582 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1583 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1584 <        CompletableFuture<Integer> g = f.thenCombine(f2, add);
1585 <        f.complete(one);
1586 <        checkIncomplete(g);
1587 <        f2.complete(two);
1588 <        checkCompletedNormally(g, three);
1589 <
1590 <        f = new CompletableFuture<Integer>();
1591 <        f.complete(one);
1592 <        f2 = new CompletableFuture<Integer>();
1593 <        g = f.thenCombine(f2, add);
1594 <        checkIncomplete(g);
1595 <        f2.complete(two);
1596 <        checkCompletedNormally(g, three);
1597 <    }
1581 >    public void testThenAccept_actionFailed() {
1582 >        for (ExecutionMode m : ExecutionMode.values())
1583 >        for (Integer v1 : new Integer[] { 1, null })
1584 >    {
1585 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1586 >        final FailingConsumer[] rs = new FailingConsumer[4];
1587 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
1588 >
1589 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1590 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1591 >        assertTrue(f.complete(v1));
1592 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1593 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1594 >
1595 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1596 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1597 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1598 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1599 >        checkCompletedNormally(f, v1);
1600 >    }}
1601 >
1602 >    /**
1603 >     * thenCombine result completes normally after normal completion
1604 >     * of sources
1605 >     */
1606 >    public void testThenCombine_normalCompletion() {
1607 >        for (ExecutionMode m : ExecutionMode.values())
1608 >        for (boolean fFirst : new boolean[] { true, false })
1609 >        for (Integer v1 : new Integer[] { 1, null })
1610 >        for (Integer v2 : new Integer[] { 2, null })
1611 >    {
1612 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1613 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1614 >        final SubtractFunction[] rs = new SubtractFunction[6];
1615 >        for (int i = 0; i < rs.length; i++) rs[i] = new SubtractFunction(m);
1616 >
1617 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1618 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1619 >        final Integer w1 =  fFirst ? v1 : v2;
1620 >        final Integer w2 = !fFirst ? v1 : v2;
1621 >
1622 >        final CompletableFuture<Integer> h0 = m.thenCombine(f, g, rs[0]);
1623 >        final CompletableFuture<Integer> h1 = m.thenCombine(fst, fst, rs[1]);
1624 >        assertTrue(fst.complete(w1));
1625 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, rs[2]);
1626 >        final CompletableFuture<Integer> h3 = m.thenCombine(fst, fst, rs[3]);
1627 >        checkIncomplete(h0); rs[0].assertNotInvoked();
1628 >        checkIncomplete(h2); rs[2].assertNotInvoked();
1629 >        checkCompletedNormally(h1, subtract(w1, w1));
1630 >        checkCompletedNormally(h3, subtract(w1, w1));
1631 >        rs[1].assertValue(subtract(w1, w1));
1632 >        rs[3].assertValue(subtract(w1, w1));
1633 >        assertTrue(snd.complete(w2));
1634 >        final CompletableFuture<Integer> h4 = m.thenCombine(f, g, rs[4]);
1635 >
1636 >        checkCompletedNormally(h0, subtract(v1, v2));
1637 >        checkCompletedNormally(h2, subtract(v1, v2));
1638 >        checkCompletedNormally(h4, subtract(v1, v2));
1639 >        rs[0].assertValue(subtract(v1, v2));
1640 >        rs[2].assertValue(subtract(v1, v2));
1641 >        rs[4].assertValue(subtract(v1, v2));
1642 >
1643 >        checkCompletedNormally(f, v1);
1644 >        checkCompletedNormally(g, v2);
1645 >    }}
1646  
1647      /**
1648       * thenCombine result completes exceptionally after exceptional
1649       * completion of either source
1650       */
1651 <    public void testThenCombine2() {
1652 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1653 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1654 <        CompletableFuture<Integer> g = f.thenCombine(f2, add);
1655 <        f.completeExceptionally(new CFException());
1656 <        f2.complete(two);
1657 <        checkCompletedWithWrappedCFException(g);
1658 <
1659 <        f = new CompletableFuture<Integer>();
1660 <        f.complete(one);
1661 <        f2 = new CompletableFuture<Integer>();
1662 <        g = f.thenCombine(f2, add);
1663 <        f2.completeExceptionally(new CFException());
1664 <        checkCompletedWithWrappedCFException(g);
1665 <    }
1651 >    public void testThenCombine_exceptionalCompletion() throws Throwable {
1652 >        for (ExecutionMode m : ExecutionMode.values())
1653 >        for (boolean fFirst : new boolean[] { true, false })
1654 >        for (boolean failFirst : new boolean[] { true, false })
1655 >        for (Integer v1 : new Integer[] { 1, null })
1656 >    {
1657 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1658 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1659 >        final CFException ex = new CFException();
1660 >        final SubtractFunction r1 = new SubtractFunction(m);
1661 >        final SubtractFunction r2 = new SubtractFunction(m);
1662 >        final SubtractFunction r3 = new SubtractFunction(m);
1663 >
1664 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1665 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1666 >        final Callable<Boolean> complete1 = failFirst ?
1667 >            () -> fst.completeExceptionally(ex) :
1668 >            () -> fst.complete(v1);
1669 >        final Callable<Boolean> complete2 = failFirst ?
1670 >            () -> snd.complete(v1) :
1671 >            () -> snd.completeExceptionally(ex);
1672 >
1673 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1674 >        assertTrue(complete1.call());
1675 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1676 >        checkIncomplete(h1);
1677 >        checkIncomplete(h2);
1678 >        assertTrue(complete2.call());
1679 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1680 >
1681 >        checkCompletedWithWrappedException(h1, ex);
1682 >        checkCompletedWithWrappedException(h2, ex);
1683 >        checkCompletedWithWrappedException(h3, ex);
1684 >        r1.assertNotInvoked();
1685 >        r2.assertNotInvoked();
1686 >        r3.assertNotInvoked();
1687 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1688 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1689 >    }}
1690  
1691      /**
1692 <     * thenCombine result completes exceptionally if action does
1692 >     * thenCombine result completes exceptionally if either source cancelled
1693       */
1694 <    public void testThenCombine3() {
1695 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1696 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1697 <        FailingBiFunction r = new FailingBiFunction();
1698 <        CompletableFuture<Integer> g = f.thenCombine(f2, r);
1699 <        f.complete(one);
1700 <        checkIncomplete(g);
1701 <        f2.complete(two);
1702 <        checkCompletedWithWrappedCFException(g);
1703 <    }
1694 >    public void testThenCombine_sourceCancelled() throws Throwable {
1695 >        for (ExecutionMode m : ExecutionMode.values())
1696 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1697 >        for (boolean fFirst : new boolean[] { true, false })
1698 >        for (boolean failFirst : new boolean[] { true, false })
1699 >        for (Integer v1 : new Integer[] { 1, null })
1700 >    {
1701 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1702 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1703 >        final SubtractFunction r1 = new SubtractFunction(m);
1704 >        final SubtractFunction r2 = new SubtractFunction(m);
1705 >        final SubtractFunction r3 = new SubtractFunction(m);
1706 >
1707 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1708 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1709 >        final Callable<Boolean> complete1 = failFirst ?
1710 >            () -> fst.cancel(mayInterruptIfRunning) :
1711 >            () -> fst.complete(v1);
1712 >        final Callable<Boolean> complete2 = failFirst ?
1713 >            () -> snd.complete(v1) :
1714 >            () -> snd.cancel(mayInterruptIfRunning);
1715 >
1716 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1717 >        assertTrue(complete1.call());
1718 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1719 >        checkIncomplete(h1);
1720 >        checkIncomplete(h2);
1721 >        assertTrue(complete2.call());
1722 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1723 >
1724 >        checkCompletedWithWrappedCancellationException(h1);
1725 >        checkCompletedWithWrappedCancellationException(h2);
1726 >        checkCompletedWithWrappedCancellationException(h3);
1727 >        r1.assertNotInvoked();
1728 >        r2.assertNotInvoked();
1729 >        r3.assertNotInvoked();
1730 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1731 >        checkCancelled(failFirst ? fst : snd);
1732 >    }}
1733  
1734      /**
1735 <     * thenCombine result completes exceptionally if either source cancelled
1735 >     * thenCombine result completes exceptionally if action does
1736       */
1737 <    public void testThenCombine4() {
1738 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1739 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1740 <        CompletableFuture<Integer> g = f.thenCombine(f2, add);
1741 <        assertTrue(f.cancel(true));
1742 <        f2.complete(two);
1743 <        checkCompletedWithWrappedCancellationException(g);
1744 <        f = new CompletableFuture<Integer>();
1745 <        f2 = new CompletableFuture<Integer>();
1746 <        g = f.thenCombine(f2, add);
1747 <        f.complete(one);
1748 <        assertTrue(f2.cancel(true));
1749 <        checkCompletedWithWrappedCancellationException(g);
1750 <    }
1737 >    public void testThenCombine_actionFailed() {
1738 >        for (ExecutionMode m : ExecutionMode.values())
1739 >        for (boolean fFirst : new boolean[] { true, false })
1740 >        for (Integer v1 : new Integer[] { 1, null })
1741 >        for (Integer v2 : new Integer[] { 2, null })
1742 >    {
1743 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1744 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1745 >        final FailingBiFunction r1 = new FailingBiFunction(m);
1746 >        final FailingBiFunction r2 = new FailingBiFunction(m);
1747 >        final FailingBiFunction r3 = new FailingBiFunction(m);
1748 >
1749 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1750 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1751 >        final Integer w1 =  fFirst ? v1 : v2;
1752 >        final Integer w2 = !fFirst ? v1 : v2;
1753 >
1754 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1755 >        assertTrue(fst.complete(w1));
1756 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1757 >        assertTrue(snd.complete(w2));
1758 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1759 >
1760 >        checkCompletedWithWrappedException(h1, r1.ex);
1761 >        checkCompletedWithWrappedException(h2, r2.ex);
1762 >        checkCompletedWithWrappedException(h3, r3.ex);
1763 >        r1.assertInvoked();
1764 >        r2.assertInvoked();
1765 >        r3.assertInvoked();
1766 >        checkCompletedNormally(f, v1);
1767 >        checkCompletedNormally(g, v2);
1768 >    }}
1769  
1770      /**
1771       * thenAcceptBoth result completes normally after normal
1772       * completion of sources
1773       */
1774 <    public void testThenAcceptBoth() {
1775 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1776 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1777 <        AddAction r = new AddAction();
1778 <        CompletableFuture<Void> g = f.thenAcceptBoth(f2, r);
1779 <        f.complete(one);
1780 <        checkIncomplete(g);
1781 <        f2.complete(two);
1782 <        checkCompletedNormally(g, null);
1783 <        assertEquals(r.value, 3);
1784 <
1785 <        r = new AddAction();
1786 <        f = new CompletableFuture<Integer>();
1787 <        f.complete(one);
1788 <        f2 = new CompletableFuture<Integer>();
1789 <        g = f.thenAcceptBoth(f2, r);
1790 <        checkIncomplete(g);
1791 <        f2.complete(two);
1792 <        checkCompletedNormally(g, null);
1793 <        assertEquals(r.value, 3);
1794 <    }
1774 >    public void testThenAcceptBoth_normalCompletion() {
1775 >        for (ExecutionMode m : ExecutionMode.values())
1776 >        for (boolean fFirst : new boolean[] { true, false })
1777 >        for (Integer v1 : new Integer[] { 1, null })
1778 >        for (Integer v2 : new Integer[] { 2, null })
1779 >    {
1780 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1781 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1782 >        final SubtractAction r1 = new SubtractAction(m);
1783 >        final SubtractAction r2 = new SubtractAction(m);
1784 >        final SubtractAction r3 = new SubtractAction(m);
1785 >
1786 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1787 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1788 >        final Integer w1 =  fFirst ? v1 : v2;
1789 >        final Integer w2 = !fFirst ? v1 : v2;
1790 >
1791 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1792 >        assertTrue(fst.complete(w1));
1793 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1794 >        checkIncomplete(h1);
1795 >        checkIncomplete(h2);
1796 >        r1.assertNotInvoked();
1797 >        r2.assertNotInvoked();
1798 >        assertTrue(snd.complete(w2));
1799 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1800 >
1801 >        checkCompletedNormally(h1, null);
1802 >        checkCompletedNormally(h2, null);
1803 >        checkCompletedNormally(h3, null);
1804 >        r1.assertValue(subtract(v1, v2));
1805 >        r2.assertValue(subtract(v1, v2));
1806 >        r3.assertValue(subtract(v1, v2));
1807 >        checkCompletedNormally(f, v1);
1808 >        checkCompletedNormally(g, v2);
1809 >    }}
1810  
1811      /**
1812       * thenAcceptBoth result completes exceptionally after exceptional
1813       * completion of either source
1814       */
1815 <    public void testThenAcceptBoth2() {
1816 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1817 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1818 <        AddAction r = new AddAction();
1819 <        CompletableFuture<Void> g = f.thenAcceptBoth(f2, r);
1820 <        f.completeExceptionally(new CFException());
1821 <        f2.complete(two);
1822 <        checkCompletedWithWrappedCFException(g);
1823 <
1824 <        r = new AddAction();
1825 <        f = new CompletableFuture<Integer>();
1826 <        f.complete(one);
1827 <        f2 = new CompletableFuture<Integer>();
1828 <        g = f.thenAcceptBoth(f2, r);
1829 <        f2.completeExceptionally(new CFException());
1830 <        checkCompletedWithWrappedCFException(g);
1831 <    }
1815 >    public void testThenAcceptBoth_exceptionalCompletion() throws Throwable {
1816 >        for (ExecutionMode m : ExecutionMode.values())
1817 >        for (boolean fFirst : new boolean[] { true, false })
1818 >        for (boolean failFirst : new boolean[] { true, false })
1819 >        for (Integer v1 : new Integer[] { 1, null })
1820 >    {
1821 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1822 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1823 >        final CFException ex = new CFException();
1824 >        final SubtractAction r1 = new SubtractAction(m);
1825 >        final SubtractAction r2 = new SubtractAction(m);
1826 >        final SubtractAction r3 = new SubtractAction(m);
1827 >
1828 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1829 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1830 >        final Callable<Boolean> complete1 = failFirst ?
1831 >            () -> fst.completeExceptionally(ex) :
1832 >            () -> fst.complete(v1);
1833 >        final Callable<Boolean> complete2 = failFirst ?
1834 >            () -> snd.complete(v1) :
1835 >            () -> snd.completeExceptionally(ex);
1836 >
1837 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1838 >        assertTrue(complete1.call());
1839 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1840 >        checkIncomplete(h1);
1841 >        checkIncomplete(h2);
1842 >        assertTrue(complete2.call());
1843 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1844 >
1845 >        checkCompletedWithWrappedException(h1, ex);
1846 >        checkCompletedWithWrappedException(h2, ex);
1847 >        checkCompletedWithWrappedException(h3, ex);
1848 >        r1.assertNotInvoked();
1849 >        r2.assertNotInvoked();
1850 >        r3.assertNotInvoked();
1851 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1852 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1853 >    }}
1854  
1855      /**
1856 <     * thenAcceptBoth result completes exceptionally if action does
1856 >     * thenAcceptBoth result completes exceptionally if either source cancelled
1857       */
1858 <    public void testThenAcceptBoth3() {
1859 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1860 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1861 <        FailingBiConsumer r = new FailingBiConsumer();
1862 <        CompletableFuture<Void> g = f.thenAcceptBoth(f2, r);
1863 <        f.complete(one);
1864 <        checkIncomplete(g);
1865 <        f2.complete(two);
1866 <        checkCompletedWithWrappedCFException(g);
1867 <    }
1858 >    public void testThenAcceptBoth_sourceCancelled() throws Throwable {
1859 >        for (ExecutionMode m : ExecutionMode.values())
1860 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1861 >        for (boolean fFirst : new boolean[] { true, false })
1862 >        for (boolean failFirst : new boolean[] { true, false })
1863 >        for (Integer v1 : new Integer[] { 1, null })
1864 >    {
1865 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1866 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1867 >        final SubtractAction r1 = new SubtractAction(m);
1868 >        final SubtractAction r2 = new SubtractAction(m);
1869 >        final SubtractAction r3 = new SubtractAction(m);
1870 >
1871 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1872 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1873 >        final Callable<Boolean> complete1 = failFirst ?
1874 >            () -> fst.cancel(mayInterruptIfRunning) :
1875 >            () -> fst.complete(v1);
1876 >        final Callable<Boolean> complete2 = failFirst ?
1877 >            () -> snd.complete(v1) :
1878 >            () -> snd.cancel(mayInterruptIfRunning);
1879 >
1880 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1881 >        assertTrue(complete1.call());
1882 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1883 >        checkIncomplete(h1);
1884 >        checkIncomplete(h2);
1885 >        assertTrue(complete2.call());
1886 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1887 >
1888 >        checkCompletedWithWrappedCancellationException(h1);
1889 >        checkCompletedWithWrappedCancellationException(h2);
1890 >        checkCompletedWithWrappedCancellationException(h3);
1891 >        r1.assertNotInvoked();
1892 >        r2.assertNotInvoked();
1893 >        r3.assertNotInvoked();
1894 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1895 >        checkCancelled(failFirst ? fst : snd);
1896 >    }}
1897  
1898      /**
1899 <     * thenAcceptBoth result completes exceptionally if either source cancelled
1899 >     * thenAcceptBoth result completes exceptionally if action does
1900       */
1901 <    public void testThenAcceptBoth4() {
1902 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1903 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1904 <        AddAction r = new AddAction();
1905 <        CompletableFuture<Void> g = f.thenAcceptBoth(f2, r);
1906 <        assertTrue(f.cancel(true));
1907 <        f2.complete(two);
1908 <        checkCompletedWithWrappedCancellationException(g);
1909 <        f = new CompletableFuture<Integer>();
1910 <        f2 = new CompletableFuture<Integer>();
1911 <        r = new AddAction();
1912 <        g = f.thenAcceptBoth(f2, r);
1913 <        f.complete(one);
1914 <        assertTrue(f2.cancel(true));
1915 <        checkCompletedWithWrappedCancellationException(g);
1916 <    }
1901 >    public void testThenAcceptBoth_actionFailed() {
1902 >        for (ExecutionMode m : ExecutionMode.values())
1903 >        for (boolean fFirst : new boolean[] { true, false })
1904 >        for (Integer v1 : new Integer[] { 1, null })
1905 >        for (Integer v2 : new Integer[] { 2, null })
1906 >    {
1907 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1908 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1909 >        final FailingBiConsumer r1 = new FailingBiConsumer(m);
1910 >        final FailingBiConsumer r2 = new FailingBiConsumer(m);
1911 >        final FailingBiConsumer r3 = new FailingBiConsumer(m);
1912 >
1913 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1914 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1915 >        final Integer w1 =  fFirst ? v1 : v2;
1916 >        final Integer w2 = !fFirst ? v1 : v2;
1917 >
1918 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1919 >        assertTrue(fst.complete(w1));
1920 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1921 >        assertTrue(snd.complete(w2));
1922 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1923 >
1924 >        checkCompletedWithWrappedException(h1, r1.ex);
1925 >        checkCompletedWithWrappedException(h2, r2.ex);
1926 >        checkCompletedWithWrappedException(h3, r3.ex);
1927 >        r1.assertInvoked();
1928 >        r2.assertInvoked();
1929 >        r3.assertInvoked();
1930 >        checkCompletedNormally(f, v1);
1931 >        checkCompletedNormally(g, v2);
1932 >    }}
1933  
1934      /**
1935       * runAfterBoth result completes normally after normal
1936       * completion of sources
1937       */
1938 <    public void testRunAfterBoth() {
1939 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1940 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1941 <        Noop r = new Noop();
1942 <        CompletableFuture<Void> g = f.runAfterBoth(f2, r);
1943 <        f.complete(one);
1944 <        checkIncomplete(g);
1945 <        f2.complete(two);
1946 <        checkCompletedNormally(g, null);
1947 <        assertTrue(r.ran);
1948 <
1949 <        r = new Noop();
1950 <        f = new CompletableFuture<Integer>();
1951 <        f.complete(one);
1952 <        f2 = new CompletableFuture<Integer>();
1953 <        g = f.runAfterBoth(f2, r);
1954 <        checkIncomplete(g);
1955 <        f2.complete(two);
1956 <        checkCompletedNormally(g, null);
1957 <        assertTrue(r.ran);
1958 <    }
1938 >    public void testRunAfterBoth_normalCompletion() {
1939 >        for (ExecutionMode m : ExecutionMode.values())
1940 >        for (boolean fFirst : new boolean[] { true, false })
1941 >        for (Integer v1 : new Integer[] { 1, null })
1942 >        for (Integer v2 : new Integer[] { 2, null })
1943 >    {
1944 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1945 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1946 >        final Noop r1 = new Noop(m);
1947 >        final Noop r2 = new Noop(m);
1948 >        final Noop r3 = new Noop(m);
1949 >
1950 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1951 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1952 >        final Integer w1 =  fFirst ? v1 : v2;
1953 >        final Integer w2 = !fFirst ? v1 : v2;
1954 >
1955 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
1956 >        assertTrue(fst.complete(w1));
1957 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
1958 >        checkIncomplete(h1);
1959 >        checkIncomplete(h2);
1960 >        r1.assertNotInvoked();
1961 >        r2.assertNotInvoked();
1962 >        assertTrue(snd.complete(w2));
1963 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
1964 >
1965 >        checkCompletedNormally(h1, null);
1966 >        checkCompletedNormally(h2, null);
1967 >        checkCompletedNormally(h3, null);
1968 >        r1.assertInvoked();
1969 >        r2.assertInvoked();
1970 >        r3.assertInvoked();
1971 >        checkCompletedNormally(f, v1);
1972 >        checkCompletedNormally(g, v2);
1973 >    }}
1974  
1975      /**
1976       * runAfterBoth result completes exceptionally after exceptional
1977       * completion of either source
1978       */
1979 <    public void testRunAfterBoth2() {
1980 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1981 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1982 <        Noop r = new Noop();
1983 <        CompletableFuture<Void> g = f.runAfterBoth(f2, r);
1984 <        f.completeExceptionally(new CFException());
1985 <        f2.complete(two);
1986 <        checkCompletedWithWrappedCFException(g);
1987 <
1988 <        r = new Noop();
1989 <        f = new CompletableFuture<Integer>();
1990 <        f.complete(one);
1991 <        f2 = new CompletableFuture<Integer>();
1992 <        g = f.runAfterBoth(f2, r);
1993 <        f2.completeExceptionally(new CFException());
1994 <        checkCompletedWithWrappedCFException(g);
1995 <    }
1979 >    public void testRunAfterBoth_exceptionalCompletion() throws Throwable {
1980 >        for (ExecutionMode m : ExecutionMode.values())
1981 >        for (boolean fFirst : new boolean[] { true, false })
1982 >        for (boolean failFirst : new boolean[] { true, false })
1983 >        for (Integer v1 : new Integer[] { 1, null })
1984 >    {
1985 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1986 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
1987 >        final CFException ex = new CFException();
1988 >        final Noop r1 = new Noop(m);
1989 >        final Noop r2 = new Noop(m);
1990 >        final Noop r3 = new Noop(m);
1991 >
1992 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1993 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1994 >        final Callable<Boolean> complete1 = failFirst ?
1995 >            () -> fst.completeExceptionally(ex) :
1996 >            () -> fst.complete(v1);
1997 >        final Callable<Boolean> complete2 = failFirst ?
1998 >            () -> snd.complete(v1) :
1999 >            () -> snd.completeExceptionally(ex);
2000 >
2001 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2002 >        assertTrue(complete1.call());
2003 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2004 >        checkIncomplete(h1);
2005 >        checkIncomplete(h2);
2006 >        assertTrue(complete2.call());
2007 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2008 >
2009 >        checkCompletedWithWrappedException(h1, ex);
2010 >        checkCompletedWithWrappedException(h2, ex);
2011 >        checkCompletedWithWrappedException(h3, ex);
2012 >        r1.assertNotInvoked();
2013 >        r2.assertNotInvoked();
2014 >        r3.assertNotInvoked();
2015 >        checkCompletedNormally(failFirst ? snd : fst, v1);
2016 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
2017 >    }}
2018  
2019      /**
2020 <     * runAfterBoth result completes exceptionally if action does
2020 >     * runAfterBoth result completes exceptionally if either source cancelled
2021       */
2022 <    public void testRunAfterBoth3() {
2023 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2024 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2025 <        FailingNoop r = new FailingNoop();
2026 <        CompletableFuture<Void> g = f.runAfterBoth(f2, r);
2027 <        f.complete(one);
2028 <        checkIncomplete(g);
2029 <        f2.complete(two);
2030 <        checkCompletedWithWrappedCFException(g);
2031 <    }
2022 >    public void testRunAfterBoth_sourceCancelled() throws Throwable {
2023 >        for (ExecutionMode m : ExecutionMode.values())
2024 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2025 >        for (boolean fFirst : new boolean[] { true, false })
2026 >        for (boolean failFirst : new boolean[] { true, false })
2027 >        for (Integer v1 : new Integer[] { 1, null })
2028 >    {
2029 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2030 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2031 >        final Noop r1 = new Noop(m);
2032 >        final Noop r2 = new Noop(m);
2033 >        final Noop r3 = new Noop(m);
2034 >
2035 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2036 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2037 >        final Callable<Boolean> complete1 = failFirst ?
2038 >            () -> fst.cancel(mayInterruptIfRunning) :
2039 >            () -> fst.complete(v1);
2040 >        final Callable<Boolean> complete2 = failFirst ?
2041 >            () -> snd.complete(v1) :
2042 >            () -> snd.cancel(mayInterruptIfRunning);
2043 >
2044 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2045 >        assertTrue(complete1.call());
2046 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2047 >        checkIncomplete(h1);
2048 >        checkIncomplete(h2);
2049 >        assertTrue(complete2.call());
2050 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2051 >
2052 >        checkCompletedWithWrappedCancellationException(h1);
2053 >        checkCompletedWithWrappedCancellationException(h2);
2054 >        checkCompletedWithWrappedCancellationException(h3);
2055 >        r1.assertNotInvoked();
2056 >        r2.assertNotInvoked();
2057 >        r3.assertNotInvoked();
2058 >        checkCompletedNormally(failFirst ? snd : fst, v1);
2059 >        checkCancelled(failFirst ? fst : snd);
2060 >    }}
2061  
2062      /**
2063 <     * runAfterBoth result completes exceptionally if either source cancelled
2063 >     * runAfterBoth result completes exceptionally if action does
2064       */
2065 <    public void testRunAfterBoth4() {
2066 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2067 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2068 <        Noop r = new Noop();
2069 <        CompletableFuture<Void> g = f.runAfterBoth(f2, r);
2070 <        assertTrue(f.cancel(true));
2071 <        f2.complete(two);
2072 <        checkCompletedWithWrappedCancellationException(g);
2073 <        f = new CompletableFuture<Integer>();
2074 <        f2 = new CompletableFuture<Integer>();
2075 <        r = new Noop();
2076 <        g = f.runAfterBoth(f2, r);
2077 <        f.complete(one);
2078 <        assertTrue(f2.cancel(true));
2079 <        checkCompletedWithWrappedCancellationException(g);
2080 <    }
2065 >    public void testRunAfterBoth_actionFailed() {
2066 >        for (ExecutionMode m : ExecutionMode.values())
2067 >        for (boolean fFirst : new boolean[] { true, false })
2068 >        for (Integer v1 : new Integer[] { 1, null })
2069 >        for (Integer v2 : new Integer[] { 2, null })
2070 >    {
2071 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2072 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2073 >        final FailingRunnable r1 = new FailingRunnable(m);
2074 >        final FailingRunnable r2 = new FailingRunnable(m);
2075 >        final FailingRunnable r3 = new FailingRunnable(m);
2076 >
2077 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2078 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2079 >        final Integer w1 =  fFirst ? v1 : v2;
2080 >        final Integer w2 = !fFirst ? v1 : v2;
2081 >
2082 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2083 >        assertTrue(fst.complete(w1));
2084 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2085 >        assertTrue(snd.complete(w2));
2086 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2087 >
2088 >        checkCompletedWithWrappedException(h1, r1.ex);
2089 >        checkCompletedWithWrappedException(h2, r2.ex);
2090 >        checkCompletedWithWrappedException(h3, r3.ex);
2091 >        r1.assertInvoked();
2092 >        r2.assertInvoked();
2093 >        r3.assertInvoked();
2094 >        checkCompletedNormally(f, v1);
2095 >        checkCompletedNormally(g, v2);
2096 >    }}
2097  
2098      /**
2099       * applyToEither result completes normally after normal completion
2100       * of either source
2101       */
2102 <    public void testApplyToEither() {
2103 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2104 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2105 <        CompletableFuture<Integer> g = f.applyToEither(f2, inc);
2106 <        f.complete(one);
2107 <        checkCompletedNormally(g, two);
2108 <        f2.complete(one);
2109 <        checkCompletedNormally(g, two);
2110 <
2111 <        f = new CompletableFuture<Integer>();
2112 <        f.complete(one);
2113 <        f2 = new CompletableFuture<Integer>();
2114 <        g = f.applyToEither(f2, inc);
2115 <        checkCompletedNormally(g, two);
2116 <    }
2102 >    public void testApplyToEither_normalCompletion() {
2103 >        for (ExecutionMode m : ExecutionMode.values())
2104 >        for (Integer v1 : new Integer[] { 1, null })
2105 >        for (Integer v2 : new Integer[] { 2, null })
2106 >    {
2107 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2108 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2109 >        final IncFunction[] rs = new IncFunction[6];
2110 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2111 >
2112 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2113 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2114 >        checkIncomplete(h0);
2115 >        checkIncomplete(h1);
2116 >        rs[0].assertNotInvoked();
2117 >        rs[1].assertNotInvoked();
2118 >        f.complete(v1);
2119 >        checkCompletedNormally(h0, inc(v1));
2120 >        checkCompletedNormally(h1, inc(v1));
2121 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2122 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2123 >        checkCompletedNormally(h2, inc(v1));
2124 >        checkCompletedNormally(h3, inc(v1));
2125 >        g.complete(v2);
2126 >
2127 >        // unspecified behavior - both source completions available
2128 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2129 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2130 >        rs[4].assertValue(h4.join());
2131 >        rs[5].assertValue(h5.join());
2132 >        assertTrue(Objects.equals(inc(v1), h4.join()) ||
2133 >                   Objects.equals(inc(v2), h4.join()));
2134 >        assertTrue(Objects.equals(inc(v1), h5.join()) ||
2135 >                   Objects.equals(inc(v2), h5.join()));
2136 >
2137 >        checkCompletedNormally(f, v1);
2138 >        checkCompletedNormally(g, v2);
2139 >        checkCompletedNormally(h0, inc(v1));
2140 >        checkCompletedNormally(h1, inc(v1));
2141 >        checkCompletedNormally(h2, inc(v1));
2142 >        checkCompletedNormally(h3, inc(v1));
2143 >        for (int i = 0; i < 4; i++) rs[i].assertValue(inc(v1));
2144 >    }}
2145  
2146      /**
2147       * applyToEither result completes exceptionally after exceptional
2148       * completion of either source
2149       */
2150 <    public void testApplyToEither2() {
2151 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2152 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2153 <        CompletableFuture<Integer> g = f.applyToEither(f2, inc);
2154 <        f.completeExceptionally(new CFException());
2155 <        f2.complete(one);
2156 <        checkCompletedWithWrappedCFException(g);
2150 >    public void testApplyToEither_exceptionalCompletion() {
2151 >        for (ExecutionMode m : ExecutionMode.values())
2152 >        for (Integer v1 : new Integer[] { 1, null })
2153 >    {
2154 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2155 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2156 >        final CFException ex = new CFException();
2157 >        final IncFunction[] rs = new IncFunction[6];
2158 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2159 >
2160 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2161 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2162 >        checkIncomplete(h0);
2163 >        checkIncomplete(h1);
2164 >        rs[0].assertNotInvoked();
2165 >        rs[1].assertNotInvoked();
2166 >        f.completeExceptionally(ex);
2167 >        checkCompletedWithWrappedException(h0, ex);
2168 >        checkCompletedWithWrappedException(h1, ex);
2169 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2170 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2171 >        checkCompletedWithWrappedException(h2, ex);
2172 >        checkCompletedWithWrappedException(h3, ex);
2173 >        g.complete(v1);
2174 >
2175 >        // unspecified behavior - both source completions available
2176 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2177 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2178 >        try {
2179 >            assertEquals(inc(v1), h4.join());
2180 >            rs[4].assertValue(inc(v1));
2181 >        } catch (CompletionException ok) {
2182 >            checkCompletedWithWrappedException(h4, ex);
2183 >            rs[4].assertNotInvoked();
2184 >        }
2185 >        try {
2186 >            assertEquals(inc(v1), h5.join());
2187 >            rs[5].assertValue(inc(v1));
2188 >        } catch (CompletionException ok) {
2189 >            checkCompletedWithWrappedException(h5, ex);
2190 >            rs[5].assertNotInvoked();
2191 >        }
2192  
2193 <        f = new CompletableFuture<Integer>();
2194 <        f2 = new CompletableFuture<Integer>();
2195 <        f2.completeExceptionally(new CFException());
2196 <        g = f.applyToEither(f2, inc);
2197 <        checkCompletedWithWrappedCFException(g);
2198 <    }
2193 >        checkCompletedExceptionally(f, ex);
2194 >        checkCompletedNormally(g, v1);
2195 >        checkCompletedWithWrappedException(h0, ex);
2196 >        checkCompletedWithWrappedException(h1, ex);
2197 >        checkCompletedWithWrappedException(h2, ex);
2198 >        checkCompletedWithWrappedException(h3, ex);
2199 >        checkCompletedWithWrappedException(h4, ex);
2200 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2201 >    }}
2202 >
2203 >    public void testApplyToEither_exceptionalCompletion2() {
2204 >        for (ExecutionMode m : ExecutionMode.values())
2205 >        for (boolean fFirst : new boolean[] { true, false })
2206 >        for (Integer v1 : new Integer[] { 1, null })
2207 >    {
2208 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2209 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2210 >        final CFException ex = new CFException();
2211 >        final IncFunction[] rs = new IncFunction[6];
2212 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2213 >
2214 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2215 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2216 >        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2217 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2218 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2219 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2220 >
2221 >        // unspecified behavior - both source completions available
2222 >        try {
2223 >            assertEquals(inc(v1), h0.join());
2224 >            rs[0].assertValue(inc(v1));
2225 >        } catch (CompletionException ok) {
2226 >            checkCompletedWithWrappedException(h0, ex);
2227 >            rs[0].assertNotInvoked();
2228 >        }
2229 >        try {
2230 >            assertEquals(inc(v1), h1.join());
2231 >            rs[1].assertValue(inc(v1));
2232 >        } catch (CompletionException ok) {
2233 >            checkCompletedWithWrappedException(h1, ex);
2234 >            rs[1].assertNotInvoked();
2235 >        }
2236 >        try {
2237 >            assertEquals(inc(v1), h2.join());
2238 >            rs[2].assertValue(inc(v1));
2239 >        } catch (CompletionException ok) {
2240 >            checkCompletedWithWrappedException(h2, ex);
2241 >            rs[2].assertNotInvoked();
2242 >        }
2243 >        try {
2244 >            assertEquals(inc(v1), h3.join());
2245 >            rs[3].assertValue(inc(v1));
2246 >        } catch (CompletionException ok) {
2247 >            checkCompletedWithWrappedException(h3, ex);
2248 >            rs[3].assertNotInvoked();
2249 >        }
2250 >
2251 >        checkCompletedNormally(f, v1);
2252 >        checkCompletedExceptionally(g, ex);
2253 >    }}
2254  
2255      /**
2256 <     * applyToEither result completes exceptionally if action does
2256 >     * applyToEither result completes exceptionally if either source cancelled
2257       */
2258 <    public void testApplyToEither3() {
2259 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2260 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2261 <        FailingFunction r = new FailingFunction();
2262 <        CompletableFuture<Integer> g = f.applyToEither(f2, r);
2263 <        f2.complete(two);
2264 <        checkCompletedWithWrappedCFException(g);
2265 <    }
2258 >    public void testApplyToEither_sourceCancelled() {
2259 >        for (ExecutionMode m : ExecutionMode.values())
2260 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2261 >        for (Integer v1 : new Integer[] { 1, null })
2262 >    {
2263 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2264 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2265 >        final IncFunction[] rs = new IncFunction[6];
2266 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2267 >
2268 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2269 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2270 >        checkIncomplete(h0);
2271 >        checkIncomplete(h1);
2272 >        rs[0].assertNotInvoked();
2273 >        rs[1].assertNotInvoked();
2274 >        f.cancel(mayInterruptIfRunning);
2275 >        checkCompletedWithWrappedCancellationException(h0);
2276 >        checkCompletedWithWrappedCancellationException(h1);
2277 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2278 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2279 >        checkCompletedWithWrappedCancellationException(h2);
2280 >        checkCompletedWithWrappedCancellationException(h3);
2281 >        g.complete(v1);
2282 >
2283 >        // unspecified behavior - both source completions available
2284 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2285 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2286 >        try {
2287 >            assertEquals(inc(v1), h4.join());
2288 >            rs[4].assertValue(inc(v1));
2289 >        } catch (CompletionException ok) {
2290 >            checkCompletedWithWrappedCancellationException(h4);
2291 >            rs[4].assertNotInvoked();
2292 >        }
2293 >        try {
2294 >            assertEquals(inc(v1), h5.join());
2295 >            rs[5].assertValue(inc(v1));
2296 >        } catch (CompletionException ok) {
2297 >            checkCompletedWithWrappedCancellationException(h5);
2298 >            rs[5].assertNotInvoked();
2299 >        }
2300 >
2301 >        checkCancelled(f);
2302 >        checkCompletedNormally(g, v1);
2303 >        checkCompletedWithWrappedCancellationException(h0);
2304 >        checkCompletedWithWrappedCancellationException(h1);
2305 >        checkCompletedWithWrappedCancellationException(h2);
2306 >        checkCompletedWithWrappedCancellationException(h3);
2307 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2308 >    }}
2309 >
2310 >    public void testApplyToEither_sourceCancelled2() {
2311 >        for (ExecutionMode m : ExecutionMode.values())
2312 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2313 >        for (boolean fFirst : new boolean[] { true, false })
2314 >        for (Integer v1 : new Integer[] { 1, null })
2315 >    {
2316 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2317 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2318 >        final IncFunction[] rs = new IncFunction[6];
2319 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2320 >
2321 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2322 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2323 >        assertTrue(fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2324 >        assertTrue(!fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2325 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2326 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2327 >
2328 >        // unspecified behavior - both source completions available
2329 >        try {
2330 >            assertEquals(inc(v1), h0.join());
2331 >            rs[0].assertValue(inc(v1));
2332 >        } catch (CompletionException ok) {
2333 >            checkCompletedWithWrappedCancellationException(h0);
2334 >            rs[0].assertNotInvoked();
2335 >        }
2336 >        try {
2337 >            assertEquals(inc(v1), h1.join());
2338 >            rs[1].assertValue(inc(v1));
2339 >        } catch (CompletionException ok) {
2340 >            checkCompletedWithWrappedCancellationException(h1);
2341 >            rs[1].assertNotInvoked();
2342 >        }
2343 >        try {
2344 >            assertEquals(inc(v1), h2.join());
2345 >            rs[2].assertValue(inc(v1));
2346 >        } catch (CompletionException ok) {
2347 >            checkCompletedWithWrappedCancellationException(h2);
2348 >            rs[2].assertNotInvoked();
2349 >        }
2350 >        try {
2351 >            assertEquals(inc(v1), h3.join());
2352 >            rs[3].assertValue(inc(v1));
2353 >        } catch (CompletionException ok) {
2354 >            checkCompletedWithWrappedCancellationException(h3);
2355 >            rs[3].assertNotInvoked();
2356 >        }
2357 >
2358 >        checkCompletedNormally(f, v1);
2359 >        checkCancelled(g);
2360 >    }}
2361  
2362      /**
2363 <     * applyToEither result completes exceptionally if either source cancelled
2363 >     * applyToEither result completes exceptionally if action does
2364       */
2365 <    public void testApplyToEither4() {
2366 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2367 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2368 <        CompletableFuture<Integer> g = f.applyToEither(f2, inc);
2369 <        assertTrue(f.cancel(true));
2370 <        checkCompletedWithWrappedCancellationException(g);
2371 <        f = new CompletableFuture<Integer>();
2372 <        f2 = new CompletableFuture<Integer>();
2373 <        assertTrue(f2.cancel(true));
2374 <        checkCompletedWithWrappedCancellationException(g);
2375 <    }
2365 >    public void testApplyToEither_actionFailed() {
2366 >        for (ExecutionMode m : ExecutionMode.values())
2367 >        for (Integer v1 : new Integer[] { 1, null })
2368 >        for (Integer v2 : new Integer[] { 2, null })
2369 >    {
2370 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2371 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2372 >        final FailingFunction[] rs = new FailingFunction[6];
2373 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
2374 >
2375 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2376 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2377 >        f.complete(v1);
2378 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2379 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2380 >        checkCompletedWithWrappedException(h0, rs[0].ex);
2381 >        checkCompletedWithWrappedException(h1, rs[1].ex);
2382 >        checkCompletedWithWrappedException(h2, rs[2].ex);
2383 >        checkCompletedWithWrappedException(h3, rs[3].ex);
2384 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2385 >
2386 >        g.complete(v2);
2387 >
2388 >        // unspecified behavior - both source completions available
2389 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2390 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2391 >
2392 >        checkCompletedWithWrappedException(h4, rs[4].ex);
2393 >        assertTrue(Objects.equals(v1, rs[4].value) ||
2394 >                   Objects.equals(v2, rs[4].value));
2395 >        checkCompletedWithWrappedException(h5, rs[5].ex);
2396 >        assertTrue(Objects.equals(v1, rs[5].value) ||
2397 >                   Objects.equals(v2, rs[5].value));
2398 >
2399 >        checkCompletedNormally(f, v1);
2400 >        checkCompletedNormally(g, v2);
2401 >    }}
2402  
2403      /**
2404       * acceptEither result completes normally after normal completion
2405       * of either source
2406       */
2407 <    public void testAcceptEither() {
2408 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2409 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2410 <        IncAction r = new IncAction();
2411 <        CompletableFuture<Void> g = f.acceptEither(f2, r);
2412 <        f.complete(one);
2413 <        checkCompletedNormally(g, null);
2414 <        f2.complete(one);
2415 <        checkCompletedNormally(g, null);
2416 <        assertEquals(r.value, 2);
2417 <
2418 <        r = new IncAction();
2419 <        f = new CompletableFuture<Integer>();
2420 <        f.complete(one);
2421 <        f2 = new CompletableFuture<Integer>();
2422 <        g = f.acceptEither(f2, r);
2423 <        checkCompletedNormally(g, null);
2424 <        assertEquals(r.value, 2);
2425 <    }
2407 >    public void testAcceptEither_normalCompletion() {
2408 >        for (ExecutionMode m : ExecutionMode.values())
2409 >        for (Integer v1 : new Integer[] { 1, null })
2410 >        for (Integer v2 : new Integer[] { 2, null })
2411 >    {
2412 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2413 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2414 >        final NoopConsumer[] rs = new NoopConsumer[6];
2415 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2416 >
2417 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2418 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2419 >        checkIncomplete(h0);
2420 >        checkIncomplete(h1);
2421 >        rs[0].assertNotInvoked();
2422 >        rs[1].assertNotInvoked();
2423 >        f.complete(v1);
2424 >        checkCompletedNormally(h0, null);
2425 >        checkCompletedNormally(h1, null);
2426 >        rs[0].assertValue(v1);
2427 >        rs[1].assertValue(v1);
2428 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2429 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2430 >        checkCompletedNormally(h2, null);
2431 >        checkCompletedNormally(h3, null);
2432 >        rs[2].assertValue(v1);
2433 >        rs[3].assertValue(v1);
2434 >        g.complete(v2);
2435 >
2436 >        // unspecified behavior - both source completions available
2437 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2438 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2439 >        checkCompletedNormally(h4, null);
2440 >        checkCompletedNormally(h5, null);
2441 >        assertTrue(Objects.equals(v1, rs[4].value) ||
2442 >                   Objects.equals(v2, rs[4].value));
2443 >        assertTrue(Objects.equals(v1, rs[5].value) ||
2444 >                   Objects.equals(v2, rs[5].value));
2445 >
2446 >        checkCompletedNormally(f, v1);
2447 >        checkCompletedNormally(g, v2);
2448 >        checkCompletedNormally(h0, null);
2449 >        checkCompletedNormally(h1, null);
2450 >        checkCompletedNormally(h2, null);
2451 >        checkCompletedNormally(h3, null);
2452 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2453 >    }}
2454  
2455      /**
2456       * acceptEither result completes exceptionally after exceptional
2457       * completion of either source
2458       */
2459 <    public void testAcceptEither2() {
2460 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2461 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2462 <        IncAction r = new IncAction();
2463 <        CompletableFuture<Void> g = f.acceptEither(f2, r);
2464 <        f.completeExceptionally(new CFException());
2465 <        f2.complete(one);
2466 <        checkCompletedWithWrappedCFException(g);
2459 >    public void testAcceptEither_exceptionalCompletion() {
2460 >        for (ExecutionMode m : ExecutionMode.values())
2461 >        for (Integer v1 : new Integer[] { 1, null })
2462 >    {
2463 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2464 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2465 >        final CFException ex = new CFException();
2466 >        final NoopConsumer[] rs = new NoopConsumer[6];
2467 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2468 >
2469 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2470 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2471 >        checkIncomplete(h0);
2472 >        checkIncomplete(h1);
2473 >        rs[0].assertNotInvoked();
2474 >        rs[1].assertNotInvoked();
2475 >        f.completeExceptionally(ex);
2476 >        checkCompletedWithWrappedException(h0, ex);
2477 >        checkCompletedWithWrappedException(h1, ex);
2478 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2479 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2480 >        checkCompletedWithWrappedException(h2, ex);
2481 >        checkCompletedWithWrappedException(h3, ex);
2482 >
2483 >        g.complete(v1);
2484 >
2485 >        // unspecified behavior - both source completions available
2486 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2487 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2488 >        try {
2489 >            assertNull(h4.join());
2490 >            rs[4].assertValue(v1);
2491 >        } catch (CompletionException ok) {
2492 >            checkCompletedWithWrappedException(h4, ex);
2493 >            rs[4].assertNotInvoked();
2494 >        }
2495 >        try {
2496 >            assertNull(h5.join());
2497 >            rs[5].assertValue(v1);
2498 >        } catch (CompletionException ok) {
2499 >            checkCompletedWithWrappedException(h5, ex);
2500 >            rs[5].assertNotInvoked();
2501 >        }
2502  
2503 <        r = new IncAction();
2504 <        f = new CompletableFuture<Integer>();
2505 <        f2 = new CompletableFuture<Integer>();
2506 <        f2.completeExceptionally(new CFException());
2507 <        g = f.acceptEither(f2, r);
2508 <        checkCompletedWithWrappedCFException(g);
2509 <    }
2503 >        checkCompletedExceptionally(f, ex);
2504 >        checkCompletedNormally(g, v1);
2505 >        checkCompletedWithWrappedException(h0, ex);
2506 >        checkCompletedWithWrappedException(h1, ex);
2507 >        checkCompletedWithWrappedException(h2, ex);
2508 >        checkCompletedWithWrappedException(h3, ex);
2509 >        checkCompletedWithWrappedException(h4, ex);
2510 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2511 >    }}
2512 >
2513 >    public void testAcceptEither_exceptionalCompletion2() {
2514 >        for (ExecutionMode m : ExecutionMode.values())
2515 >        for (boolean fFirst : new boolean[] { true, false })
2516 >        for (Integer v1 : new Integer[] { 1, null })
2517 >    {
2518 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2519 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2520 >        final CFException ex = new CFException();
2521 >        final NoopConsumer[] rs = new NoopConsumer[6];
2522 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2523 >
2524 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2525 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2526 >        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2527 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2528 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2529 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2530  
2531 <    /**
2532 <     * acceptEither result completes exceptionally if action does
2533 <     */
2534 <    public void testAcceptEither3() {
2535 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2536 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2537 <        FailingConsumer r = new FailingConsumer();
2538 <        CompletableFuture<Void> g = f.acceptEither(f2, r);
2539 <        f2.complete(two);
2540 <        checkCompletedWithWrappedCFException(g);
2541 <    }
2531 >        // unspecified behavior - both source completions available
2532 >        try {
2533 >            assertEquals(null, h0.join());
2534 >            rs[0].assertValue(v1);
2535 >        } catch (CompletionException ok) {
2536 >            checkCompletedWithWrappedException(h0, ex);
2537 >            rs[0].assertNotInvoked();
2538 >        }
2539 >        try {
2540 >            assertEquals(null, h1.join());
2541 >            rs[1].assertValue(v1);
2542 >        } catch (CompletionException ok) {
2543 >            checkCompletedWithWrappedException(h1, ex);
2544 >            rs[1].assertNotInvoked();
2545 >        }
2546 >        try {
2547 >            assertEquals(null, h2.join());
2548 >            rs[2].assertValue(v1);
2549 >        } catch (CompletionException ok) {
2550 >            checkCompletedWithWrappedException(h2, ex);
2551 >            rs[2].assertNotInvoked();
2552 >        }
2553 >        try {
2554 >            assertEquals(null, h3.join());
2555 >            rs[3].assertValue(v1);
2556 >        } catch (CompletionException ok) {
2557 >            checkCompletedWithWrappedException(h3, ex);
2558 >            rs[3].assertNotInvoked();
2559 >        }
2560 >
2561 >        checkCompletedNormally(f, v1);
2562 >        checkCompletedExceptionally(g, ex);
2563 >    }}
2564  
2565      /**
2566       * acceptEither result completes exceptionally if either source cancelled
2567       */
2568 <    public void testAcceptEither4() {
2569 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2570 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2571 <        IncAction r = new IncAction();
2572 <        CompletableFuture<Void> g = f.acceptEither(f2, r);
2573 <        assertTrue(f.cancel(true));
2574 <        checkCompletedWithWrappedCancellationException(g);
2575 <        f = new CompletableFuture<Integer>();
2576 <        f2 = new CompletableFuture<Integer>();
2577 <        assertTrue(f2.cancel(true));
2578 <        checkCompletedWithWrappedCancellationException(g);
2579 <    }
2568 >    public void testAcceptEither_sourceCancelled() {
2569 >        for (ExecutionMode m : ExecutionMode.values())
2570 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2571 >        for (Integer v1 : new Integer[] { 1, null })
2572 >    {
2573 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2574 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2575 >        final NoopConsumer[] rs = new NoopConsumer[6];
2576 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2577 >
2578 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2579 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2580 >        checkIncomplete(h0);
2581 >        checkIncomplete(h1);
2582 >        rs[0].assertNotInvoked();
2583 >        rs[1].assertNotInvoked();
2584 >        f.cancel(mayInterruptIfRunning);
2585 >        checkCompletedWithWrappedCancellationException(h0);
2586 >        checkCompletedWithWrappedCancellationException(h1);
2587 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2588 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2589 >        checkCompletedWithWrappedCancellationException(h2);
2590 >        checkCompletedWithWrappedCancellationException(h3);
2591 >
2592 >        g.complete(v1);
2593 >
2594 >        // unspecified behavior - both source completions available
2595 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2596 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2597 >        try {
2598 >            assertNull(h4.join());
2599 >            rs[4].assertValue(v1);
2600 >        } catch (CompletionException ok) {
2601 >            checkCompletedWithWrappedCancellationException(h4);
2602 >            rs[4].assertNotInvoked();
2603 >        }
2604 >        try {
2605 >            assertNull(h5.join());
2606 >            rs[5].assertValue(v1);
2607 >        } catch (CompletionException ok) {
2608 >            checkCompletedWithWrappedCancellationException(h5);
2609 >            rs[5].assertNotInvoked();
2610 >        }
2611 >
2612 >        checkCancelled(f);
2613 >        checkCompletedNormally(g, v1);
2614 >        checkCompletedWithWrappedCancellationException(h0);
2615 >        checkCompletedWithWrappedCancellationException(h1);
2616 >        checkCompletedWithWrappedCancellationException(h2);
2617 >        checkCompletedWithWrappedCancellationException(h3);
2618 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2619 >    }}
2620  
2621 +    /**
2622 +     * acceptEither result completes exceptionally if action does
2623 +     */
2624 +    public void testAcceptEither_actionFailed() {
2625 +        for (ExecutionMode m : ExecutionMode.values())
2626 +        for (Integer v1 : new Integer[] { 1, null })
2627 +        for (Integer v2 : new Integer[] { 2, null })
2628 +    {
2629 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2630 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2631 +        final FailingConsumer[] rs = new FailingConsumer[6];
2632 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
2633 +
2634 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2635 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2636 +        f.complete(v1);
2637 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2638 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2639 +        checkCompletedWithWrappedException(h0, rs[0].ex);
2640 +        checkCompletedWithWrappedException(h1, rs[1].ex);
2641 +        checkCompletedWithWrappedException(h2, rs[2].ex);
2642 +        checkCompletedWithWrappedException(h3, rs[3].ex);
2643 +        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2644 +
2645 +        g.complete(v2);
2646 +
2647 +        // unspecified behavior - both source completions available
2648 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2649 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2650 +
2651 +        checkCompletedWithWrappedException(h4, rs[4].ex);
2652 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2653 +                   Objects.equals(v2, rs[4].value));
2654 +        checkCompletedWithWrappedException(h5, rs[5].ex);
2655 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2656 +                   Objects.equals(v2, rs[5].value));
2657 +
2658 +        checkCompletedNormally(f, v1);
2659 +        checkCompletedNormally(g, v2);
2660 +    }}
2661  
2662      /**
2663       * runAfterEither result completes normally after normal completion
2664       * of either source
2665       */
2666 <    public void testRunAfterEither() {
2667 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2668 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2669 <        Noop r = new Noop();
2670 <        CompletableFuture<Void> g = f.runAfterEither(f2, r);
2671 <        f.complete(one);
2672 <        checkCompletedNormally(g, null);
2673 <        f2.complete(one);
2674 <        checkCompletedNormally(g, null);
2675 <        assertTrue(r.ran);
2676 <
2677 <        r = new Noop();
2678 <        f = new CompletableFuture<Integer>();
2679 <        f.complete(one);
2680 <        f2 = new CompletableFuture<Integer>();
2681 <        g = f.runAfterEither(f2, r);
2682 <        checkCompletedNormally(g, null);
2683 <        assertTrue(r.ran);
2684 <    }
2666 >    public void testRunAfterEither_normalCompletion() {
2667 >        for (ExecutionMode m : ExecutionMode.values())
2668 >        for (Integer v1 : new Integer[] { 1, null })
2669 >        for (Integer v2 : new Integer[] { 2, null })
2670 >    {
2671 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2672 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2673 >        final Noop[] rs = new Noop[6];
2674 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2675 >
2676 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2677 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2678 >        checkIncomplete(h0);
2679 >        checkIncomplete(h1);
2680 >        rs[0].assertNotInvoked();
2681 >        rs[1].assertNotInvoked();
2682 >        f.complete(v1);
2683 >        checkCompletedNormally(h0, null);
2684 >        checkCompletedNormally(h1, null);
2685 >        rs[0].assertInvoked();
2686 >        rs[1].assertInvoked();
2687 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2688 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2689 >        checkCompletedNormally(h2, null);
2690 >        checkCompletedNormally(h3, null);
2691 >        rs[2].assertInvoked();
2692 >        rs[3].assertInvoked();
2693 >
2694 >        g.complete(v2);
2695 >
2696 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2697 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2698 >
2699 >        checkCompletedNormally(f, v1);
2700 >        checkCompletedNormally(g, v2);
2701 >        checkCompletedNormally(h0, null);
2702 >        checkCompletedNormally(h1, null);
2703 >        checkCompletedNormally(h2, null);
2704 >        checkCompletedNormally(h3, null);
2705 >        checkCompletedNormally(h4, null);
2706 >        checkCompletedNormally(h5, null);
2707 >        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2708 >    }}
2709  
2710      /**
2711       * runAfterEither result completes exceptionally after exceptional
2712       * completion of either source
2713       */
2714 <    public void testRunAfterEither2() {
2715 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2716 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2717 <        Noop r = new Noop();
2718 <        CompletableFuture<Void> g = f.runAfterEither(f2, r);
2719 <        f.completeExceptionally(new CFException());
2720 <        f2.complete(one);
2721 <        checkCompletedWithWrappedCFException(g);
2714 >    public void testRunAfterEither_exceptionalCompletion() {
2715 >        for (ExecutionMode m : ExecutionMode.values())
2716 >        for (Integer v1 : new Integer[] { 1, null })
2717 >    {
2718 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2719 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2720 >        final CFException ex = new CFException();
2721 >        final Noop[] rs = new Noop[6];
2722 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2723 >
2724 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2725 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2726 >        checkIncomplete(h0);
2727 >        checkIncomplete(h1);
2728 >        rs[0].assertNotInvoked();
2729 >        rs[1].assertNotInvoked();
2730 >        assertTrue(f.completeExceptionally(ex));
2731 >        checkCompletedWithWrappedException(h0, ex);
2732 >        checkCompletedWithWrappedException(h1, ex);
2733 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2734 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2735 >        checkCompletedWithWrappedException(h2, ex);
2736 >        checkCompletedWithWrappedException(h3, ex);
2737 >
2738 >        assertTrue(g.complete(v1));
2739 >
2740 >        // unspecified behavior - both source completions available
2741 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2742 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2743 >        try {
2744 >            assertNull(h4.join());
2745 >            rs[4].assertInvoked();
2746 >        } catch (CompletionException ok) {
2747 >            checkCompletedWithWrappedException(h4, ex);
2748 >            rs[4].assertNotInvoked();
2749 >        }
2750 >        try {
2751 >            assertNull(h5.join());
2752 >            rs[5].assertInvoked();
2753 >        } catch (CompletionException ok) {
2754 >            checkCompletedWithWrappedException(h5, ex);
2755 >            rs[5].assertNotInvoked();
2756 >        }
2757  
2758 <        r = new Noop();
2759 <        f = new CompletableFuture<Integer>();
2760 <        f2 = new CompletableFuture<Integer>();
2761 <        f2.completeExceptionally(new CFException());
2762 <        g = f.runAfterEither(f2, r);
2763 <        checkCompletedWithWrappedCFException(g);
2764 <    }
2758 >        checkCompletedExceptionally(f, ex);
2759 >        checkCompletedNormally(g, v1);
2760 >        checkCompletedWithWrappedException(h0, ex);
2761 >        checkCompletedWithWrappedException(h1, ex);
2762 >        checkCompletedWithWrappedException(h2, ex);
2763 >        checkCompletedWithWrappedException(h3, ex);
2764 >        checkCompletedWithWrappedException(h4, ex);
2765 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2766 >    }}
2767 >
2768 >    public void testRunAfterEither_exceptionalCompletion2() {
2769 >        for (ExecutionMode m : ExecutionMode.values())
2770 >        for (boolean fFirst : new boolean[] { true, false })
2771 >        for (Integer v1 : new Integer[] { 1, null })
2772 >    {
2773 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2774 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2775 >        final CFException ex = new CFException();
2776 >        final Noop[] rs = new Noop[6];
2777 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2778 >
2779 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2780 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2781 >        assertTrue( fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2782 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2783 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2784 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2785 >
2786 >        // unspecified behavior - both source completions available
2787 >        try {
2788 >            assertEquals(null, h0.join());
2789 >            rs[0].assertInvoked();
2790 >        } catch (CompletionException ok) {
2791 >            checkCompletedWithWrappedException(h0, ex);
2792 >            rs[0].assertNotInvoked();
2793 >        }
2794 >        try {
2795 >            assertEquals(null, h1.join());
2796 >            rs[1].assertInvoked();
2797 >        } catch (CompletionException ok) {
2798 >            checkCompletedWithWrappedException(h1, ex);
2799 >            rs[1].assertNotInvoked();
2800 >        }
2801 >        try {
2802 >            assertEquals(null, h2.join());
2803 >            rs[2].assertInvoked();
2804 >        } catch (CompletionException ok) {
2805 >            checkCompletedWithWrappedException(h2, ex);
2806 >            rs[2].assertNotInvoked();
2807 >        }
2808 >        try {
2809 >            assertEquals(null, h3.join());
2810 >            rs[3].assertInvoked();
2811 >        } catch (CompletionException ok) {
2812 >            checkCompletedWithWrappedException(h3, ex);
2813 >            rs[3].assertNotInvoked();
2814 >        }
2815 >
2816 >        checkCompletedNormally(f, v1);
2817 >        checkCompletedExceptionally(g, ex);
2818 >    }}
2819  
2820      /**
2821 <     * runAfterEither result completes exceptionally if action does
2821 >     * runAfterEither result completes exceptionally if either source cancelled
2822       */
2823 <    public void testRunAfterEither3() {
2824 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2825 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2826 <        FailingNoop r = new FailingNoop();
2827 <        CompletableFuture<Void> g = f.runAfterEither(f2, r);
2828 <        f2.complete(two);
2829 <        checkCompletedWithWrappedCFException(g);
2830 <    }
2823 >    public void testRunAfterEither_sourceCancelled() {
2824 >        for (ExecutionMode m : ExecutionMode.values())
2825 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2826 >        for (Integer v1 : new Integer[] { 1, null })
2827 >    {
2828 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2829 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2830 >        final Noop[] rs = new Noop[6];
2831 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2832 >
2833 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2834 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2835 >        checkIncomplete(h0);
2836 >        checkIncomplete(h1);
2837 >        rs[0].assertNotInvoked();
2838 >        rs[1].assertNotInvoked();
2839 >        f.cancel(mayInterruptIfRunning);
2840 >        checkCompletedWithWrappedCancellationException(h0);
2841 >        checkCompletedWithWrappedCancellationException(h1);
2842 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2843 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2844 >        checkCompletedWithWrappedCancellationException(h2);
2845 >        checkCompletedWithWrappedCancellationException(h3);
2846 >
2847 >        assertTrue(g.complete(v1));
2848 >
2849 >        // unspecified behavior - both source completions available
2850 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2851 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2852 >        try {
2853 >            assertNull(h4.join());
2854 >            rs[4].assertInvoked();
2855 >        } catch (CompletionException ok) {
2856 >            checkCompletedWithWrappedCancellationException(h4);
2857 >            rs[4].assertNotInvoked();
2858 >        }
2859 >        try {
2860 >            assertNull(h5.join());
2861 >            rs[5].assertInvoked();
2862 >        } catch (CompletionException ok) {
2863 >            checkCompletedWithWrappedCancellationException(h5);
2864 >            rs[5].assertNotInvoked();
2865 >        }
2866 >
2867 >        checkCancelled(f);
2868 >        checkCompletedNormally(g, v1);
2869 >        checkCompletedWithWrappedCancellationException(h0);
2870 >        checkCompletedWithWrappedCancellationException(h1);
2871 >        checkCompletedWithWrappedCancellationException(h2);
2872 >        checkCompletedWithWrappedCancellationException(h3);
2873 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2874 >    }}
2875  
2876      /**
2877 <     * runAfterEither result completes exceptionally if either source cancelled
2877 >     * runAfterEither result completes exceptionally if action does
2878       */
2879 <    public void testRunAfterEither4() {
2880 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2881 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2882 <        Noop r = new Noop();
2883 <        CompletableFuture<Void> g = f.runAfterEither(f2, r);
2884 <        assertTrue(f.cancel(true));
2885 <        checkCompletedWithWrappedCancellationException(g);
2886 <        f = new CompletableFuture<Integer>();
2887 <        f2 = new CompletableFuture<Integer>();
2888 <        assertTrue(f2.cancel(true));
2889 <        checkCompletedWithWrappedCancellationException(g);
2890 <    }
2879 >    public void testRunAfterEither_actionFailed() {
2880 >        for (ExecutionMode m : ExecutionMode.values())
2881 >        for (Integer v1 : new Integer[] { 1, null })
2882 >        for (Integer v2 : new Integer[] { 2, null })
2883 >    {
2884 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2885 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2886 >        final FailingRunnable[] rs = new FailingRunnable[6];
2887 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
2888 >
2889 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2890 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2891 >        assertTrue(f.complete(v1));
2892 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2893 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2894 >        checkCompletedWithWrappedException(h0, rs[0].ex);
2895 >        checkCompletedWithWrappedException(h1, rs[1].ex);
2896 >        checkCompletedWithWrappedException(h2, rs[2].ex);
2897 >        checkCompletedWithWrappedException(h3, rs[3].ex);
2898 >        for (int i = 0; i < 4; i++) rs[i].assertInvoked();
2899 >        assertTrue(g.complete(v2));
2900 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2901 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2902 >        checkCompletedWithWrappedException(h4, rs[4].ex);
2903 >        checkCompletedWithWrappedException(h5, rs[5].ex);
2904 >
2905 >        checkCompletedNormally(f, v1);
2906 >        checkCompletedNormally(g, v2);
2907 >        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2908 >    }}
2909  
2910      /**
2911       * thenCompose result completes normally after normal completion of source
2912       */
2913 <    public void testThenCompose() {
2914 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2915 <        CompletableFutureInc r = new CompletableFutureInc();
2916 <        CompletableFuture<Integer> g = f.thenCompose(r);
2917 <        f.complete(one);
2918 <        checkCompletedNormally(g, two);
2919 <    }
2913 >    public void testThenCompose_normalCompletion() {
2914 >        for (ExecutionMode m : ExecutionMode.values())
2915 >        for (boolean createIncomplete : new boolean[] { true, false })
2916 >        for (Integer v1 : new Integer[] { 1, null })
2917 >    {
2918 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2919 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2920 >        if (!createIncomplete) assertTrue(f.complete(v1));
2921 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2922 >        if (createIncomplete) assertTrue(f.complete(v1));
2923 >
2924 >        checkCompletedNormally(g, inc(v1));
2925 >        checkCompletedNormally(f, v1);
2926 >        r.assertValue(v1);
2927 >    }}
2928  
2929      /**
2930       * thenCompose result completes exceptionally after exceptional
2931       * completion of source
2932       */
2933 <    public void testThenCompose2() {
2934 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2935 <        CompletableFutureInc r = new CompletableFutureInc();
2936 <        CompletableFuture<Integer> g = f.thenCompose(r);
2937 <        f.completeExceptionally(new CFException());
2938 <        checkCompletedWithWrappedCFException(g);
2939 <    }
2933 >    public void testThenCompose_exceptionalCompletion() {
2934 >        for (ExecutionMode m : ExecutionMode.values())
2935 >        for (boolean createIncomplete : new boolean[] { true, false })
2936 >    {
2937 >        final CFException ex = new CFException();
2938 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2939 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2940 >        if (!createIncomplete) f.completeExceptionally(ex);
2941 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2942 >        if (createIncomplete) f.completeExceptionally(ex);
2943 >
2944 >        checkCompletedWithWrappedException(g, ex);
2945 >        checkCompletedExceptionally(f, ex);
2946 >        r.assertNotInvoked();
2947 >    }}
2948  
2949      /**
2950       * thenCompose result completes exceptionally if action does
2951       */
2952 <    public void testThenCompose3() {
2953 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2954 <        FailingCompletableFutureFunction r = new FailingCompletableFutureFunction();
2955 <        CompletableFuture<Integer> g = f.thenCompose(r);
2956 <        f.complete(one);
2957 <        checkCompletedWithWrappedCFException(g);
2958 <    }
2952 >    public void testThenCompose_actionFailed() {
2953 >        for (ExecutionMode m : ExecutionMode.values())
2954 >        for (boolean createIncomplete : new boolean[] { true, false })
2955 >        for (Integer v1 : new Integer[] { 1, null })
2956 >    {
2957 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2958 >        final FailingCompletableFutureFunction r
2959 >            = new FailingCompletableFutureFunction(m);
2960 >        if (!createIncomplete) assertTrue(f.complete(v1));
2961 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2962 >        if (createIncomplete) assertTrue(f.complete(v1));
2963 >
2964 >        checkCompletedWithWrappedException(g, r.ex);
2965 >        checkCompletedNormally(f, v1);
2966 >    }}
2967  
2968      /**
2969       * thenCompose result completes exceptionally if source cancelled
2970       */
2971 <    public void testThenCompose4() {
2972 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2973 <        CompletableFutureInc r = new CompletableFutureInc();
2974 <        CompletableFuture<Integer> g = f.thenCompose(r);
2975 <        assertTrue(f.cancel(true));
2976 <        checkCompletedWithWrappedCancellationException(g);
2977 <    }
2978 <
2979 <
2980 <    // asyncs
2981 <
2982 <    /**
2983 <     * thenRunAsync result completes normally after normal completion of source
1100 <     */
1101 <    public void testThenRunAsync() {
1102 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1103 <        Noop r = new Noop();
1104 <        CompletableFuture<Void> g = f.thenRunAsync(r);
1105 <        f.complete(null);
1106 <        checkCompletedNormally(g, null);
2971 >    public void testThenCompose_sourceCancelled() {
2972 >        for (ExecutionMode m : ExecutionMode.values())
2973 >        for (boolean createIncomplete : new boolean[] { true, false })
2974 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2975 >    {
2976 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2977 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2978 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
2979 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2980 >        if (createIncomplete) {
2981 >            checkIncomplete(g);
2982 >            assertTrue(f.cancel(mayInterruptIfRunning));
2983 >        }
2984  
2985 <        // reordered version
2986 <        f = new CompletableFuture<Integer>();
2987 <        f.complete(null);
1111 <        r = new Noop();
1112 <        g = f.thenRunAsync(r);
1113 <        checkCompletedNormally(g, null);
1114 <    }
2985 >        checkCompletedWithWrappedCancellationException(g);
2986 >        checkCancelled(f);
2987 >    }}
2988  
2989      /**
2990 <     * thenRunAsync result completes exceptionally after exceptional
1118 <     * completion of source
2990 >     * thenCompose result completes exceptionally if the result of the action does
2991       */
2992 <    public void testThenRunAsync2() {
2993 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2994 <        Noop r = new Noop();
2995 <        CompletableFuture<Void> g = f.thenRunAsync(r);
2996 <        f.completeExceptionally(new CFException());
2997 <        try {
2998 <            g.join();
2999 <            shouldThrow();
3000 <        } catch (Exception ok) {
2992 >    public void testThenCompose_actionReturnsFailingFuture() {
2993 >        for (ExecutionMode m : ExecutionMode.values())
2994 >        for (int order = 0; order < 6; order++)
2995 >        for (Integer v1 : new Integer[] { 1, null })
2996 >    {
2997 >        final CFException ex = new CFException();
2998 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2999 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
3000 >        final CompletableFuture<Integer> h;
3001 >        // Test all permutations of orders
3002 >        switch (order) {
3003 >        case 0:
3004 >            assertTrue(f.complete(v1));
3005 >            assertTrue(g.completeExceptionally(ex));
3006 >            h = m.thenCompose(f, (x -> g));
3007 >            break;
3008 >        case 1:
3009 >            assertTrue(f.complete(v1));
3010 >            h = m.thenCompose(f, (x -> g));
3011 >            assertTrue(g.completeExceptionally(ex));
3012 >            break;
3013 >        case 2:
3014 >            assertTrue(g.completeExceptionally(ex));
3015 >            assertTrue(f.complete(v1));
3016 >            h = m.thenCompose(f, (x -> g));
3017 >            break;
3018 >        case 3:
3019 >            assertTrue(g.completeExceptionally(ex));
3020 >            h = m.thenCompose(f, (x -> g));
3021 >            assertTrue(f.complete(v1));
3022 >            break;
3023 >        case 4:
3024 >            h = m.thenCompose(f, (x -> g));
3025 >            assertTrue(f.complete(v1));
3026 >            assertTrue(g.completeExceptionally(ex));
3027 >            break;
3028 >        case 5:
3029 >            h = m.thenCompose(f, (x -> g));
3030 >            assertTrue(f.complete(v1));
3031 >            assertTrue(g.completeExceptionally(ex));
3032 >            break;
3033 >        default: throw new AssertionError();
3034          }
1130        checkCompletedWithWrappedCFException(g);
1131    }
1132
1133    /**
1134     * thenRunAsync result completes exceptionally if action does
1135     */
1136    public void testThenRunAsync3() {
1137        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1138        FailingNoop r = new FailingNoop();
1139        CompletableFuture<Void> g = f.thenRunAsync(r);
1140        f.complete(null);
1141        checkCompletedWithWrappedCFException(g);
1142    }
3035  
3036 <    /**
3037 <     * thenRunAsync result completes exceptionally if source cancelled
3038 <     */
3039 <    public void testThenRunAsync4() {
1148 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1149 <        Noop r = new Noop();
1150 <        CompletableFuture<Void> g = f.thenRunAsync(r);
1151 <        assertTrue(f.cancel(true));
1152 <        checkCompletedWithWrappedCancellationException(g);
1153 <    }
3036 >        checkCompletedExceptionally(g, ex);
3037 >        checkCompletedWithWrappedException(h, ex);
3038 >        checkCompletedNormally(f, v1);
3039 >    }}
3040  
3041 <    /**
1156 <     * thenApplyAsync result completes normally after normal completion of source
1157 <     */
1158 <    public void testThenApplyAsync() {
1159 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1160 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
1161 <        f.complete(one);
1162 <        checkCompletedNormally(g, two);
1163 <    }
3041 >    // other static methods
3042  
3043      /**
3044 <     * thenApplyAsync result completes exceptionally after exceptional
3045 <     * completion of source
3044 >     * allOf(no component futures) returns a future completed normally
3045 >     * with the value null
3046       */
3047 <    public void testThenApplyAsync2() {
3048 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3049 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
1172 <        f.completeExceptionally(new CFException());
1173 <        checkCompletedWithWrappedCFException(g);
3047 >    public void testAllOf_empty() throws Exception {
3048 >        CompletableFuture<Void> f = CompletableFuture.allOf();
3049 >        checkCompletedNormally(f, null);
3050      }
3051  
3052      /**
3053 <     * thenApplyAsync result completes exceptionally if action does
3053 >     * allOf returns a future completed normally with the value null
3054 >     * when all components complete normally
3055       */
3056 <    public void testThenApplyAsync3() {
3057 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3058 <        FailingFunction r = new FailingFunction();
3059 <        CompletableFuture<Integer> g = f.thenApplyAsync(r);
3060 <        f.complete(null);
3061 <        checkCompletedWithWrappedCFException(g);
3056 >    public void testAllOf_normal() throws Exception {
3057 >        for (int k = 1; k < 10; k++) {
3058 >            CompletableFuture<Integer>[] fs
3059 >                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3060 >            for (int i = 0; i < k; i++)
3061 >                fs[i] = new CompletableFuture<>();
3062 >            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3063 >            for (int i = 0; i < k; i++) {
3064 >                checkIncomplete(f);
3065 >                checkIncomplete(CompletableFuture.allOf(fs));
3066 >                fs[i].complete(one);
3067 >            }
3068 >            checkCompletedNormally(f, null);
3069 >            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3070 >        }
3071      }
3072  
3073 <    /**
3074 <     * thenApplyAsync result completes exceptionally if source cancelled
3075 <     */
3076 <    public void testThenApplyAsync4() {
3077 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3078 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
3079 <        assertTrue(f.cancel(true));
3080 <        checkCompletedWithWrappedCancellationException(g);
3073 >    public void testAllOf_normal_backwards() throws Exception {
3074 >        for (int k = 1; k < 10; k++) {
3075 >            CompletableFuture<Integer>[] fs
3076 >                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3077 >            for (int i = 0; i < k; i++)
3078 >                fs[i] = new CompletableFuture<>();
3079 >            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3080 >            for (int i = k - 1; i >= 0; i--) {
3081 >                checkIncomplete(f);
3082 >                checkIncomplete(CompletableFuture.allOf(fs));
3083 >                fs[i].complete(one);
3084 >            }
3085 >            checkCompletedNormally(f, null);
3086 >            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3087 >        }
3088      }
3089  
3090 <    /**
3091 <     * thenAcceptAsync result completes normally after normal
3092 <     * completion of source
3093 <     */
3094 <    public void testThenAcceptAsync() {
3095 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3096 <        IncAction r = new IncAction();
3097 <        CompletableFuture<Void> g = f.thenAcceptAsync(r);
3098 <        f.complete(one);
3099 <        checkCompletedNormally(g, null);
3100 <        assertEquals(r.value, 2);
3090 >    public void testAllOf_exceptional() throws Exception {
3091 >        for (int k = 1; k < 10; k++) {
3092 >            CompletableFuture<Integer>[] fs
3093 >                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3094 >            CFException ex = new CFException();
3095 >            for (int i = 0; i < k; i++)
3096 >                fs[i] = new CompletableFuture<>();
3097 >            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3098 >            for (int i = 0; i < k; i++) {
3099 >                checkIncomplete(f);
3100 >                checkIncomplete(CompletableFuture.allOf(fs));
3101 >                if (i != k / 2) {
3102 >                    fs[i].complete(i);
3103 >                    checkCompletedNormally(fs[i], i);
3104 >                } else {
3105 >                    fs[i].completeExceptionally(ex);
3106 >                    checkCompletedExceptionally(fs[i], ex);
3107 >                }
3108 >            }
3109 >            checkCompletedWithWrappedException(f, ex);
3110 >            checkCompletedWithWrappedException(CompletableFuture.allOf(fs), ex);
3111 >        }
3112      }
3113  
3114      /**
3115 <     * thenAcceptAsync result completes exceptionally after exceptional
1212 <     * completion of source
3115 >     * anyOf(no component futures) returns an incomplete future
3116       */
3117 <    public void testThenAcceptAsync2() {
3118 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3119 <        IncAction r = new IncAction();
3120 <        CompletableFuture<Void> g = f.thenAcceptAsync(r);
3121 <        f.completeExceptionally(new CFException());
1219 <        checkCompletedWithWrappedCFException(g);
1220 <    }
3117 >    public void testAnyOf_empty() throws Exception {
3118 >        for (Integer v1 : new Integer[] { 1, null })
3119 >    {
3120 >        CompletableFuture<Object> f = CompletableFuture.anyOf();
3121 >        checkIncomplete(f);
3122  
3123 <    /**
3124 <     * thenAcceptAsync result completes exceptionally if action does
3125 <     */
1225 <    public void testThenAcceptAsync3() {
1226 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1227 <        FailingConsumer r = new FailingConsumer();
1228 <        CompletableFuture<Void> g = f.thenAcceptAsync(r);
1229 <        f.complete(null);
1230 <        checkCompletedWithWrappedCFException(g);
1231 <    }
3123 >        f.complete(v1);
3124 >        checkCompletedNormally(f, v1);
3125 >    }}
3126  
3127      /**
3128 <     * thenAcceptAsync result completes exceptionally if source cancelled
3128 >     * anyOf returns a future completed normally with a value when
3129 >     * a component future does
3130       */
3131 <    public void testThenAcceptAsync4() {
3132 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3133 <        IncAction r = new IncAction();
3134 <        CompletableFuture<Void> g = f.thenAcceptAsync(r);
3135 <        assertTrue(f.cancel(true));
3136 <        checkCompletedWithWrappedCancellationException(g);
3131 >    public void testAnyOf_normal() throws Exception {
3132 >        for (int k = 0; k < 10; k++) {
3133 >            CompletableFuture[] fs = new CompletableFuture[k];
3134 >            for (int i = 0; i < k; i++)
3135 >                fs[i] = new CompletableFuture<>();
3136 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3137 >            checkIncomplete(f);
3138 >            for (int i = 0; i < k; i++) {
3139 >                fs[i].complete(i);
3140 >                checkCompletedNormally(f, 0);
3141 >                int x = (int) CompletableFuture.anyOf(fs).join();
3142 >                assertTrue(0 <= x && x <= i);
3143 >            }
3144 >        }
3145      }
3146 <    /**
3147 <     * thenCombineAsync result completes normally after normal
3148 <     * completion of sources
3149 <     */
3150 <    public void testThenCombineAsync() {
3151 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3152 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3153 <        CompletableFuture<Integer> g = f.thenCombineAsync(f2, add);
3154 <        f.complete(one);
3155 <        checkIncomplete(g);
3156 <        f2.complete(two);
3157 <        checkCompletedNormally(g, three);
3146 >    public void testAnyOf_normal_backwards() throws Exception {
3147 >        for (int k = 0; k < 10; k++) {
3148 >            CompletableFuture[] fs = new CompletableFuture[k];
3149 >            for (int i = 0; i < k; i++)
3150 >                fs[i] = new CompletableFuture<>();
3151 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3152 >            checkIncomplete(f);
3153 >            for (int i = k - 1; i >= 0; i--) {
3154 >                fs[i].complete(i);
3155 >                checkCompletedNormally(f, k - 1);
3156 >                int x = (int) CompletableFuture.anyOf(fs).join();
3157 >                assertTrue(i <= x && x <= k - 1);
3158 >            }
3159 >        }
3160      }
3161  
3162      /**
3163 <     * thenCombineAsync result completes exceptionally after exceptional
1259 <     * completion of source
3163 >     * anyOf result completes exceptionally when any component does.
3164       */
3165 <    public void testThenCombineAsync2() {
3166 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3167 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3168 <        CompletableFuture<Integer> g = f.thenCombineAsync(f2, add);
3169 <        f.completeExceptionally(new CFException());
3170 <        f2.complete(two);
3171 <        checkCompletedWithWrappedCFException(g);
3172 <
3173 <        f = new CompletableFuture<Integer>();
3174 <        f2 = new CompletableFuture<Integer>();
3175 <        g = f.thenCombineAsync(f2, add);
3176 <        f.complete(one);
3177 <        f2.completeExceptionally(new CFException());
3178 <        checkCompletedWithWrappedCFException(g);
3165 >    public void testAnyOf_exceptional() throws Exception {
3166 >        for (int k = 0; k < 10; k++) {
3167 >            CompletableFuture[] fs = new CompletableFuture[k];
3168 >            CFException[] exs = new CFException[k];
3169 >            for (int i = 0; i < k; i++) {
3170 >                fs[i] = new CompletableFuture<>();
3171 >                exs[i] = new CFException();
3172 >            }
3173 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3174 >            checkIncomplete(f);
3175 >            for (int i = 0; i < k; i++) {
3176 >                fs[i].completeExceptionally(exs[i]);
3177 >                checkCompletedWithWrappedException(f, exs[0]);
3178 >                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3179 >            }
3180 >        }
3181      }
3182  
3183 <    /**
3184 <     * thenCombineAsync result completes exceptionally if action does
3185 <     */
3186 <    public void testThenCombineAsync3() {
3187 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3188 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3189 <        FailingBiFunction r = new FailingBiFunction();
3190 <        CompletableFuture<Integer> g = f.thenCombineAsync(f2, r);
3191 <        f.complete(one);
3192 <        checkIncomplete(g);
3193 <        f2.complete(two);
3194 <        checkCompletedWithWrappedCFException(g);
3183 >    public void testAnyOf_exceptional_backwards() throws Exception {
3184 >        for (int k = 0; k < 10; k++) {
3185 >            CompletableFuture[] fs = new CompletableFuture[k];
3186 >            CFException[] exs = new CFException[k];
3187 >            for (int i = 0; i < k; i++) {
3188 >                fs[i] = new CompletableFuture<>();
3189 >                exs[i] = new CFException();
3190 >            }
3191 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3192 >            checkIncomplete(f);
3193 >            for (int i = k - 1; i >= 0; i--) {
3194 >                fs[i].completeExceptionally(exs[i]);
3195 >                checkCompletedWithWrappedException(f, exs[k - 1]);
3196 >                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3197 >            }
3198 >        }
3199      }
3200  
3201      /**
3202 <     * thenCombineAsync result completes exceptionally if either source cancelled
3202 >     * Completion methods throw NullPointerException with null arguments
3203       */
3204 <    public void testThenCombineAsync4() {
3205 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3206 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3207 <        CompletableFuture<Integer> g = f.thenCombineAsync(f2, add);
3208 <        assertTrue(f.cancel(true));
1299 <        f2.complete(two);
1300 <        checkCompletedWithWrappedCancellationException(g);
3204 >    public void testNPE() {
3205 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3206 >        CompletableFuture<Integer> g = new CompletableFuture<>();
3207 >        CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
3208 >        ThreadExecutor exec = new ThreadExecutor();
3209  
3210 <        f = new CompletableFuture<Integer>();
3211 <        f2 = new CompletableFuture<Integer>();
3212 <        g = f.thenCombineAsync(f2, add);
3213 <        f.complete(one);
3214 <        assertTrue(f2.cancel(true));
3215 <        checkCompletedWithWrappedCancellationException(g);
3216 <    }
3210 >        Runnable[] throwingActions = {
3211 >            () -> CompletableFuture.supplyAsync(null),
3212 >            () -> CompletableFuture.supplyAsync(null, exec),
3213 >            () -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.SYNC, 42), null),
3214 >
3215 >            () -> CompletableFuture.runAsync(null),
3216 >            () -> CompletableFuture.runAsync(null, exec),
3217 >            () -> CompletableFuture.runAsync(() -> {}, null),
3218 >
3219 >            () -> f.completeExceptionally(null),
3220 >
3221 >            () -> f.thenApply(null),
3222 >            () -> f.thenApplyAsync(null),
3223 >            () -> f.thenApplyAsync((x) -> x, null),
3224 >            () -> f.thenApplyAsync(null, exec),
3225 >
3226 >            () -> f.thenAccept(null),
3227 >            () -> f.thenAcceptAsync(null),
3228 >            () -> f.thenAcceptAsync((x) -> {} , null),
3229 >            () -> f.thenAcceptAsync(null, exec),
3230 >
3231 >            () -> f.thenRun(null),
3232 >            () -> f.thenRunAsync(null),
3233 >            () -> f.thenRunAsync(() -> {} , null),
3234 >            () -> f.thenRunAsync(null, exec),
3235 >
3236 >            () -> f.thenCombine(g, null),
3237 >            () -> f.thenCombineAsync(g, null),
3238 >            () -> f.thenCombineAsync(g, null, exec),
3239 >            () -> f.thenCombine(nullFuture, (x, y) -> x),
3240 >            () -> f.thenCombineAsync(nullFuture, (x, y) -> x),
3241 >            () -> f.thenCombineAsync(nullFuture, (x, y) -> x, exec),
3242 >            () -> f.thenCombineAsync(g, (x, y) -> x, null),
3243 >
3244 >            () -> f.thenAcceptBoth(g, null),
3245 >            () -> f.thenAcceptBothAsync(g, null),
3246 >            () -> f.thenAcceptBothAsync(g, null, exec),
3247 >            () -> f.thenAcceptBoth(nullFuture, (x, y) -> {}),
3248 >            () -> f.thenAcceptBothAsync(nullFuture, (x, y) -> {}),
3249 >            () -> f.thenAcceptBothAsync(nullFuture, (x, y) -> {}, exec),
3250 >            () -> f.thenAcceptBothAsync(g, (x, y) -> {}, null),
3251 >
3252 >            () -> f.runAfterBoth(g, null),
3253 >            () -> f.runAfterBothAsync(g, null),
3254 >            () -> f.runAfterBothAsync(g, null, exec),
3255 >            () -> f.runAfterBoth(nullFuture, () -> {}),
3256 >            () -> f.runAfterBothAsync(nullFuture, () -> {}),
3257 >            () -> f.runAfterBothAsync(nullFuture, () -> {}, exec),
3258 >            () -> f.runAfterBothAsync(g, () -> {}, null),
3259 >
3260 >            () -> f.applyToEither(g, null),
3261 >            () -> f.applyToEitherAsync(g, null),
3262 >            () -> f.applyToEitherAsync(g, null, exec),
3263 >            () -> f.applyToEither(nullFuture, (x) -> x),
3264 >            () -> f.applyToEitherAsync(nullFuture, (x) -> x),
3265 >            () -> f.applyToEitherAsync(nullFuture, (x) -> x, exec),
3266 >            () -> f.applyToEitherAsync(g, (x) -> x, null),
3267 >
3268 >            () -> f.acceptEither(g, null),
3269 >            () -> f.acceptEitherAsync(g, null),
3270 >            () -> f.acceptEitherAsync(g, null, exec),
3271 >            () -> f.acceptEither(nullFuture, (x) -> {}),
3272 >            () -> f.acceptEitherAsync(nullFuture, (x) -> {}),
3273 >            () -> f.acceptEitherAsync(nullFuture, (x) -> {}, exec),
3274 >            () -> f.acceptEitherAsync(g, (x) -> {}, null),
3275 >
3276 >            () -> f.runAfterEither(g, null),
3277 >            () -> f.runAfterEitherAsync(g, null),
3278 >            () -> f.runAfterEitherAsync(g, null, exec),
3279 >            () -> f.runAfterEither(nullFuture, () -> {}),
3280 >            () -> f.runAfterEitherAsync(nullFuture, () -> {}),
3281 >            () -> f.runAfterEitherAsync(nullFuture, () -> {}, exec),
3282 >            () -> f.runAfterEitherAsync(g, () -> {}, null),
3283 >
3284 >            () -> f.thenCompose(null),
3285 >            () -> f.thenComposeAsync(null),
3286 >            () -> f.thenComposeAsync(new CompletableFutureInc(ExecutionMode.EXECUTOR), null),
3287 >            () -> f.thenComposeAsync(null, exec),
3288 >
3289 >            () -> f.exceptionally(null),
3290 >
3291 >            () -> f.handle(null),
3292 >
3293 >            () -> CompletableFuture.allOf((CompletableFuture<?>)null),
3294 >            () -> CompletableFuture.allOf((CompletableFuture<?>[])null),
3295 >            () -> CompletableFuture.allOf(f, null),
3296 >            () -> CompletableFuture.allOf(null, f),
3297 >
3298 >            () -> CompletableFuture.anyOf((CompletableFuture<?>)null),
3299 >            () -> CompletableFuture.anyOf((CompletableFuture<?>[])null),
3300 >            () -> CompletableFuture.anyOf(f, null),
3301 >            () -> CompletableFuture.anyOf(null, f),
3302 >
3303 >            () -> f.obtrudeException(null),
3304 >
3305 >            () -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3306 >            () -> CompletableFuture.delayedExecutor(1L, null, exec),
3307 >            () -> CompletableFuture.delayedExecutor(1L, null),
3308  
3309 <    /**
3310 <     * thenAcceptBothAsync result completes normally after normal
1312 <     * completion of sources
1313 <     */
1314 <    public void testThenAcceptBothAsync() {
1315 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1316 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1317 <        AddAction r = new AddAction();
1318 <        CompletableFuture<Void> g = f.thenAcceptBothAsync(f2, r);
1319 <        f.complete(one);
1320 <        checkIncomplete(g);
1321 <        f2.complete(two);
1322 <        checkCompletedNormally(g, null);
1323 <        assertEquals(r.value, 3);
1324 <    }
3309 >            () -> f.orTimeout(1L, null),
3310 >            () -> f.completeOnTimeout(42, 1L, null),
3311  
3312 <    /**
3313 <     * thenAcceptBothAsync result completes exceptionally after exceptional
3314 <     * completion of source
1329 <     */
1330 <    public void testThenAcceptBothAsync2() {
1331 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1332 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1333 <        AddAction r = new AddAction();
1334 <        CompletableFuture<Void> g = f.thenAcceptBothAsync(f2, r);
1335 <        f.completeExceptionally(new CFException());
1336 <        f2.complete(two);
1337 <        checkCompletedWithWrappedCFException(g);
3312 >            () -> CompletableFuture.failedFuture(null),
3313 >            () -> CompletableFuture.failedStage(null),
3314 >        };
3315  
3316 <        r = new AddAction();
3317 <        f = new CompletableFuture<Integer>();
1341 <        f2 = new CompletableFuture<Integer>();
1342 <        g = f.thenAcceptBothAsync(f2, r);
1343 <        f.complete(one);
1344 <        f2.completeExceptionally(new CFException());
1345 <        checkCompletedWithWrappedCFException(g);
3316 >        assertThrows(NullPointerException.class, throwingActions);
3317 >        assertEquals(0, exec.count.get());
3318      }
3319  
3320 <    /**
3321 <     * thenAcceptBothAsync result completes exceptionally if action does
3322 <     */
3323 <    public void testThenAcceptBothAsync3() {
3324 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3325 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3326 <        FailingBiConsumer r = new FailingBiConsumer();
1355 <        CompletableFuture<Void> g = f.thenAcceptBothAsync(f2, r);
1356 <        f.complete(one);
1357 <        checkIncomplete(g);
1358 <        f2.complete(two);
1359 <        checkCompletedWithWrappedCFException(g);
3320 >    static class CountingRejectingExecutor implements Executor {
3321 >        final RejectedExecutionException ex = new RejectedExecutionException();
3322 >        final AtomicInteger count = new AtomicInteger(0);
3323 >        public void execute(Runnable r) {
3324 >            count.getAndIncrement();
3325 >            throw ex;
3326 >        }
3327      }
3328  
3329      /**
3330 <     * thenAcceptBothAsync result completes exceptionally if either source cancelled
3330 >     * Test submissions to an executor that rejects all tasks.
3331       */
3332 <    public void testThenAcceptBothAsync4() {
3333 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1367 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1368 <        AddAction r = new AddAction();
1369 <        CompletableFuture<Void> g = f.thenAcceptBothAsync(f2, r);
1370 <        assertTrue(f.cancel(true));
1371 <        f2.complete(two);
1372 <        checkCompletedWithWrappedCancellationException(g);
3332 >    public void testRejectingExecutor() {
3333 >        for (Integer v : new Integer[] { 1, null }) {
3334  
3335 <        r = new AddAction();
1375 <        f = new CompletableFuture<Integer>();
1376 <        f2 = new CompletableFuture<Integer>();
1377 <        g = f.thenAcceptBothAsync(f2, r);
1378 <        f.complete(one);
1379 <        assertTrue(f2.cancel(true));
1380 <        checkCompletedWithWrappedCancellationException(g);
1381 <    }
3335 >        final CountingRejectingExecutor e = new CountingRejectingExecutor();
3336  
3337 <    /**
3338 <     * runAfterBothAsync result completes normally after normal
1385 <     * completion of sources
1386 <     */
1387 <    public void testRunAfterBothAsync() {
1388 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1389 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1390 <        Noop r = new Noop();
1391 <        CompletableFuture<Void> g = f.runAfterBothAsync(f2, r);
1392 <        f.complete(one);
1393 <        checkIncomplete(g);
1394 <        f2.complete(two);
1395 <        checkCompletedNormally(g, null);
1396 <        assertTrue(r.ran);
1397 <    }
3337 >        final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3338 >        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3339  
3340 <    /**
1400 <     * runAfterBothAsync result completes exceptionally after exceptional
1401 <     * completion of source
1402 <     */
1403 <    public void testRunAfterBothAsync2() {
1404 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1405 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1406 <        Noop r = new Noop();
1407 <        CompletableFuture<Void> g = f.runAfterBothAsync(f2, r);
1408 <        f.completeExceptionally(new CFException());
1409 <        f2.complete(two);
1410 <        checkCompletedWithWrappedCFException(g);
3340 >        List<CompletableFuture<?>> futures = new ArrayList<>();
3341  
3342 <        r = new Noop();
3343 <        f = new CompletableFuture<Integer>();
3344 <        f2 = new CompletableFuture<Integer>();
1415 <        g = f.runAfterBothAsync(f2, r);
1416 <        f.complete(one);
1417 <        f2.completeExceptionally(new CFException());
1418 <        checkCompletedWithWrappedCFException(g);
1419 <    }
3342 >        List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3343 >        srcs.add(complete);
3344 >        srcs.add(incomplete);
3345  
3346 <    /**
3347 <     * runAfterBothAsync result completes exceptionally if action does
3348 <     */
3349 <    public void testRunAfterBothAsync3() {
3350 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1426 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1427 <        FailingNoop r = new FailingNoop();
1428 <        CompletableFuture<Void> g = f.runAfterBothAsync(f2, r);
1429 <        f.complete(one);
1430 <        checkIncomplete(g);
1431 <        f2.complete(two);
1432 <        checkCompletedWithWrappedCFException(g);
1433 <    }
3346 >        for (CompletableFuture<Integer> src : srcs) {
3347 >            List<CompletableFuture<?>> fs = new ArrayList<>();
3348 >            fs.add(src.thenRunAsync(() -> {}, e));
3349 >            fs.add(src.thenAcceptAsync((z) -> {}, e));
3350 >            fs.add(src.thenApplyAsync((z) -> z, e));
3351  
3352 <    /**
3353 <     * runAfterBothAsync result completes exceptionally if either source cancelled
3354 <     */
1438 <    public void testRunAfterBothAsync4() {
1439 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1440 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1441 <        Noop r = new Noop();
1442 <        CompletableFuture<Void> g = f.runAfterBothAsync(f2, r);
1443 <        assertTrue(f.cancel(true));
1444 <        f2.complete(two);
1445 <        checkCompletedWithWrappedCancellationException(g);
3352 >            fs.add(src.thenCombineAsync(src, (x, y) -> x, e));
3353 >            fs.add(src.thenAcceptBothAsync(src, (x, y) -> {}, e));
3354 >            fs.add(src.runAfterBothAsync(src, () -> {}, e));
3355  
3356 <        r = new Noop();
3357 <        f = new CompletableFuture<Integer>();
3358 <        f2 = new CompletableFuture<Integer>();
1450 <        g = f.runAfterBothAsync(f2, r);
1451 <        f.complete(one);
1452 <        assertTrue(f2.cancel(true));
1453 <        checkCompletedWithWrappedCancellationException(g);
1454 <    }
3356 >            fs.add(src.applyToEitherAsync(src, (z) -> z, e));
3357 >            fs.add(src.acceptEitherAsync(src, (z) -> {}, e));
3358 >            fs.add(src.runAfterEitherAsync(src, () -> {}, e));
3359  
3360 <    /**
3361 <     * applyToEitherAsync result completes normally after normal
3362 <     * completion of sources
1459 <     */
1460 <    public void testApplyToEitherAsync() {
1461 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1462 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1463 <        CompletableFuture<Integer> g = f.applyToEitherAsync(f2, inc);
1464 <        f.complete(one);
1465 <        checkCompletedNormally(g, two);
1466 <
1467 <        f = new CompletableFuture<Integer>();
1468 <        f.complete(one);
1469 <        f2 = new CompletableFuture<Integer>();
1470 <        g = f.applyToEitherAsync(f2, inc);
1471 <        checkCompletedNormally(g, two);
1472 <    }
3360 >            fs.add(src.thenComposeAsync((z) -> null, e));
3361 >            fs.add(src.whenCompleteAsync((z, t) -> {}, e));
3362 >            fs.add(src.handleAsync((z, t) -> null, e));
3363  
3364 <    /**
3365 <     * applyToEitherAsync result completes exceptionally after exceptional
3366 <     * completion of source
3367 <     */
3368 <    public void testApplyToEitherAsync2() {
3369 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3370 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3371 <        CompletableFuture<Integer> g = f.applyToEitherAsync(f2, inc);
1482 <        f.completeExceptionally(new CFException());
1483 <        checkCompletedWithWrappedCFException(g);
3364 >            for (CompletableFuture<?> future : fs) {
3365 >                if (src.isDone())
3366 >                    checkCompletedWithWrappedException(future, e.ex);
3367 >                else
3368 >                    checkIncomplete(future);
3369 >            }
3370 >            futures.addAll(fs);
3371 >        }
3372  
3373 <        f = new CompletableFuture<Integer>();
3374 <        f2 = new CompletableFuture<Integer>();
1487 <        f2.completeExceptionally(new CFException());
1488 <        g = f.applyToEitherAsync(f2, inc);
1489 <        f.complete(one);
1490 <        checkCompletedWithWrappedCFException(g);
1491 <    }
3373 >        {
3374 >            List<CompletableFuture<?>> fs = new ArrayList<>();
3375  
3376 <    /**
3377 <     * applyToEitherAsync result completes exceptionally if action does
1495 <     */
1496 <    public void testApplyToEitherAsync3() {
1497 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1498 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1499 <        FailingFunction r = new FailingFunction();
1500 <        CompletableFuture<Integer> g = f.applyToEitherAsync(f2, r);
1501 <        f.complete(one);
1502 <        checkCompletedWithWrappedCFException(g);
1503 <    }
1504 <
1505 <    /**
1506 <     * applyToEitherAsync result completes exceptionally if either source cancelled
1507 <     */
1508 <    public void testApplyToEitherAsync4() {
1509 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1510 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1511 <        CompletableFuture<Integer> g = f.applyToEitherAsync(f2, inc);
1512 <        assertTrue(f.cancel(true));
1513 <        checkCompletedWithWrappedCancellationException(g);
3376 >            fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3377 >            fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3378  
3379 <        f = new CompletableFuture<Integer>();
3380 <        f2 = new CompletableFuture<Integer>();
1517 <        assertTrue(f2.cancel(true));
1518 <        g = f.applyToEitherAsync(f2, inc);
1519 <        checkCompletedWithWrappedCancellationException(g);
1520 <    }
3379 >            fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3380 >            fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3381  
3382 <    /**
3383 <     * acceptEitherAsync result completes normally after normal
1524 <     * completion of sources
1525 <     */
1526 <    public void testAcceptEitherAsync() {
1527 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1528 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1529 <        IncAction r = new IncAction();
1530 <        CompletableFuture<Void> g = f.acceptEitherAsync(f2, r);
1531 <        f.complete(one);
1532 <        checkCompletedNormally(g, null);
1533 <        assertEquals(r.value, 2);
3382 >            fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3383 >            fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3384  
3385 <        r = new IncAction();
3386 <        f = new CompletableFuture<Integer>();
3387 <        f.complete(one);
3388 <        f2 = new CompletableFuture<Integer>();
1539 <        g = f.acceptEitherAsync(f2, r);
1540 <        checkCompletedNormally(g, null);
1541 <        assertEquals(r.value, 2);
1542 <    }
3385 >            for (CompletableFuture<?> future : fs)
3386 >                checkIncomplete(future);
3387 >            futures.addAll(fs);
3388 >        }
3389  
3390 <    /**
3391 <     * acceptEitherAsync result completes exceptionally after exceptional
1546 <     * completion of source
1547 <     */
1548 <    public void testAcceptEitherAsync2() {
1549 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1550 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1551 <        IncAction r = new IncAction();
1552 <        CompletableFuture<Void> g = f.acceptEitherAsync(f2, r);
1553 <        f.completeExceptionally(new CFException());
1554 <        checkCompletedWithWrappedCFException(g);
3390 >        {
3391 >            List<CompletableFuture<?>> fs = new ArrayList<>();
3392  
3393 <        r = new IncAction();
3394 <        f = new CompletableFuture<Integer>();
1558 <        f2 = new CompletableFuture<Integer>();
1559 <        f2.completeExceptionally(new CFException());
1560 <        g = f.acceptEitherAsync(f2, r);
1561 <        f.complete(one);
1562 <        checkCompletedWithWrappedCFException(g);
1563 <    }
3393 >            fs.add(complete.applyToEitherAsync(incomplete, (z) -> z, e));
3394 >            fs.add(incomplete.applyToEitherAsync(complete, (z) -> z, e));
3395  
3396 <    /**
3397 <     * acceptEitherAsync result completes exceptionally if action does
1567 <     */
1568 <    public void testAcceptEitherAsync3() {
1569 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1570 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1571 <        FailingConsumer r = new FailingConsumer();
1572 <        CompletableFuture<Void> g = f.acceptEitherAsync(f2, r);
1573 <        f.complete(one);
1574 <        checkCompletedWithWrappedCFException(g);
1575 <    }
3396 >            fs.add(complete.acceptEitherAsync(incomplete, (z) -> {}, e));
3397 >            fs.add(incomplete.acceptEitherAsync(complete, (z) -> {}, e));
3398  
3399 <    /**
3400 <     * acceptEitherAsync result completes exceptionally if either
1579 <     * source cancelled
1580 <     */
1581 <    public void testAcceptEitherAsync4() {
1582 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1583 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1584 <        IncAction r = new IncAction();
1585 <        CompletableFuture<Void> g = f.acceptEitherAsync(f2, r);
1586 <        assertTrue(f.cancel(true));
1587 <        checkCompletedWithWrappedCancellationException(g);
3399 >            fs.add(complete.runAfterEitherAsync(incomplete, () -> {}, e));
3400 >            fs.add(incomplete.runAfterEitherAsync(complete, () -> {}, e));
3401  
3402 <        r = new IncAction();
3403 <        f = new CompletableFuture<Integer>();
3404 <        f2 = new CompletableFuture<Integer>();
3405 <        assertTrue(f2.cancel(true));
1593 <        g = f.acceptEitherAsync(f2, r);
1594 <        checkCompletedWithWrappedCancellationException(g);
1595 <    }
3402 >            for (CompletableFuture<?> future : fs)
3403 >                checkCompletedWithWrappedException(future, e.ex);
3404 >            futures.addAll(fs);
3405 >        }
3406  
3407 <    /**
1598 <     * runAfterEitherAsync result completes normally after normal
1599 <     * completion of sources
1600 <     */
1601 <    public void testRunAfterEitherAsync() {
1602 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1603 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1604 <        Noop r = new Noop();
1605 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r);
1606 <        f.complete(one);
1607 <        checkCompletedNormally(g, null);
1608 <        assertTrue(r.ran);
3407 >        incomplete.complete(v);
3408  
3409 <        r = new Noop();
3410 <        f = new CompletableFuture<Integer>();
1612 <        f.complete(one);
1613 <        f2 = new CompletableFuture<Integer>();
1614 <        g = f.runAfterEitherAsync(f2, r);
1615 <        checkCompletedNormally(g, null);
1616 <        assertTrue(r.ran);
1617 <    }
3409 >        for (CompletableFuture<?> future : futures)
3410 >            checkCompletedWithWrappedException(future, e.ex);
3411  
3412 <    /**
1620 <     * runAfterEitherAsync result completes exceptionally after exceptional
1621 <     * completion of source
1622 <     */
1623 <    public void testRunAfterEitherAsync2() {
1624 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1625 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1626 <        Noop r = new Noop();
1627 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r);
1628 <        f.completeExceptionally(new CFException());
1629 <        checkCompletedWithWrappedCFException(g);
3412 >        assertEquals(futures.size(), e.count.get());
3413  
3414 <        r = new Noop();
1632 <        f = new CompletableFuture<Integer>();
1633 <        f2 = new CompletableFuture<Integer>();
1634 <        f2.completeExceptionally(new CFException());
1635 <        g = f.runAfterEitherAsync(f2, r);
1636 <        f.complete(one);
1637 <        checkCompletedWithWrappedCFException(g);
3414 >        }
3415      }
3416  
3417      /**
3418 <     * runAfterEitherAsync result completes exceptionally if action does
3418 >     * Test submissions to an executor that rejects all tasks, but
3419 >     * should never be invoked because the dependent future is
3420 >     * explicitly completed.
3421       */
3422 <    public void testRunAfterEitherAsync3() {
3423 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1645 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1646 <        FailingNoop r = new FailingNoop();
1647 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r);
1648 <        f.complete(one);
1649 <        checkCompletedWithWrappedCFException(g);
1650 <    }
3422 >    public void testRejectingExecutorNeverInvoked() {
3423 >        final CountingRejectingExecutor e = new CountingRejectingExecutor();
3424  
3425 <    /**
1653 <     * runAfterEitherAsync result completes exceptionally if either
1654 <     * source cancelled
1655 <     */
1656 <    public void testRunAfterEitherAsync4() {
1657 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1658 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1659 <        Noop r = new Noop();
1660 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r);
1661 <        assertTrue(f.cancel(true));
1662 <        checkCompletedWithWrappedCancellationException(g);
3425 >        for (Integer v : new Integer[] { 1, null }) {
3426  
3427 <        r = new Noop();
3428 <        f = new CompletableFuture<Integer>();
1666 <        f2 = new CompletableFuture<Integer>();
1667 <        assertTrue(f2.cancel(true));
1668 <        g = f.runAfterEitherAsync(f2, r);
1669 <        checkCompletedWithWrappedCancellationException(g);
1670 <    }
3427 >        final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3428 >        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3429  
3430 <    /**
1673 <     * thenComposeAsync result completes normally after normal
1674 <     * completion of source
1675 <     */
1676 <    public void testThenComposeAsync() {
1677 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1678 <        CompletableFutureInc r = new CompletableFutureInc();
1679 <        CompletableFuture<Integer> g = f.thenComposeAsync(r);
1680 <        f.complete(one);
1681 <        checkCompletedNormally(g, two);
1682 <    }
3430 >        List<CompletableFuture<?>> futures = new ArrayList<>();
3431  
3432 <    /**
3433 <     * thenComposeAsync result completes exceptionally after
3434 <     * exceptional completion of source
1687 <     */
1688 <    public void testThenComposeAsync2() {
1689 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1690 <        CompletableFutureInc r = new CompletableFutureInc();
1691 <        CompletableFuture<Integer> g = f.thenComposeAsync(r);
1692 <        f.completeExceptionally(new CFException());
1693 <        checkCompletedWithWrappedCFException(g);
1694 <    }
3432 >        List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3433 >        srcs.add(complete);
3434 >        srcs.add(incomplete);
3435  
3436 <    /**
3437 <     * thenComposeAsync result completes exceptionally if action does
3438 <     */
3439 <    public void testThenComposeAsync3() {
1700 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1701 <        FailingCompletableFutureFunction r = new FailingCompletableFutureFunction();
1702 <        CompletableFuture<Integer> g = f.thenComposeAsync(r);
1703 <        f.complete(one);
1704 <        checkCompletedWithWrappedCFException(g);
1705 <    }
3436 >        List<CompletableFuture<?>> fs = new ArrayList<>();
3437 >        fs.add(incomplete.thenRunAsync(() -> {}, e));
3438 >        fs.add(incomplete.thenAcceptAsync((z) -> {}, e));
3439 >        fs.add(incomplete.thenApplyAsync((z) -> z, e));
3440  
3441 <    /**
3442 <     * thenComposeAsync result completes exceptionally if source cancelled
3443 <     */
1710 <    public void testThenComposeAsync4() {
1711 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1712 <        CompletableFutureInc r = new CompletableFutureInc();
1713 <        CompletableFuture<Integer> g = f.thenComposeAsync(r);
1714 <        assertTrue(f.cancel(true));
1715 <        checkCompletedWithWrappedCancellationException(g);
1716 <    }
3441 >        fs.add(incomplete.thenCombineAsync(incomplete, (x, y) -> x, e));
3442 >        fs.add(incomplete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3443 >        fs.add(incomplete.runAfterBothAsync(incomplete, () -> {}, e));
3444  
3445 +        fs.add(incomplete.applyToEitherAsync(incomplete, (z) -> z, e));
3446 +        fs.add(incomplete.acceptEitherAsync(incomplete, (z) -> {}, e));
3447 +        fs.add(incomplete.runAfterEitherAsync(incomplete, () -> {}, e));
3448  
3449 <    // async with explicit executors
3449 >        fs.add(incomplete.thenComposeAsync((z) -> null, e));
3450 >        fs.add(incomplete.whenCompleteAsync((z, t) -> {}, e));
3451 >        fs.add(incomplete.handleAsync((z, t) -> null, e));
3452  
3453 <    /**
3454 <     * thenRunAsync result completes normally after normal completion of source
1723 <     */
1724 <    public void testThenRunAsyncE() {
1725 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1726 <        Noop r = new Noop();
1727 <        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
1728 <        f.complete(null);
1729 <        checkCompletedNormally(g, null);
3453 >        fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3454 >        fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3455  
3456 <        // reordered version
3457 <        f = new CompletableFuture<Integer>();
1733 <        f.complete(null);
1734 <        r = new Noop();
1735 <        g = f.thenRunAsync(r, new ThreadExecutor());
1736 <        checkCompletedNormally(g, null);
1737 <    }
3456 >        fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3457 >        fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3458  
3459 <    /**
3460 <     * thenRunAsync result completes exceptionally after exceptional
1741 <     * completion of source
1742 <     */
1743 <    public void testThenRunAsync2E() {
1744 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1745 <        Noop r = new Noop();
1746 <        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
1747 <        f.completeExceptionally(new CFException());
1748 <        try {
1749 <            g.join();
1750 <            shouldThrow();
1751 <        } catch (Exception ok) {
1752 <        }
1753 <        checkCompletedWithWrappedCFException(g);
1754 <    }
3459 >        fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3460 >        fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3461  
3462 <    /**
3463 <     * thenRunAsync result completes exceptionally if action does
1758 <     */
1759 <    public void testThenRunAsync3E() {
1760 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1761 <        FailingNoop r = new FailingNoop();
1762 <        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
1763 <        f.complete(null);
1764 <        checkCompletedWithWrappedCFException(g);
1765 <    }
3462 >        for (CompletableFuture<?> future : fs)
3463 >            checkIncomplete(future);
3464  
3465 <    /**
3466 <     * thenRunAsync result completes exceptionally if source cancelled
1769 <     */
1770 <    public void testThenRunAsync4E() {
1771 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1772 <        Noop r = new Noop();
1773 <        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
1774 <        assertTrue(f.cancel(true));
1775 <        checkCompletedWithWrappedCancellationException(g);
1776 <    }
3465 >        for (CompletableFuture<?> future : fs)
3466 >            future.complete(null);
3467  
3468 <    /**
1779 <     * thenApplyAsync result completes normally after normal completion of source
1780 <     */
1781 <    public void testThenApplyAsyncE() {
1782 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1783 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
1784 <        f.complete(one);
1785 <        checkCompletedNormally(g, two);
1786 <    }
3468 >        incomplete.complete(v);
3469  
3470 <    /**
3471 <     * thenApplyAsync result completes exceptionally after exceptional
1790 <     * completion of source
1791 <     */
1792 <    public void testThenApplyAsync2E() {
1793 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1794 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
1795 <        f.completeExceptionally(new CFException());
1796 <        checkCompletedWithWrappedCFException(g);
1797 <    }
3470 >        for (CompletableFuture<?> future : fs)
3471 >            checkCompletedNormally(future, null);
3472  
3473 <    /**
1800 <     * thenApplyAsync result completes exceptionally if action does
1801 <     */
1802 <    public void testThenApplyAsync3E() {
1803 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1804 <        FailingFunction r = new FailingFunction();
1805 <        CompletableFuture<Integer> g = f.thenApplyAsync(r, new ThreadExecutor());
1806 <        f.complete(null);
1807 <        checkCompletedWithWrappedCFException(g);
1808 <    }
3473 >        assertEquals(0, e.count.get());
3474  
3475 <    /**
1811 <     * thenApplyAsync result completes exceptionally if source cancelled
1812 <     */
1813 <    public void testThenApplyAsync4E() {
1814 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1815 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
1816 <        assertTrue(f.cancel(true));
1817 <        checkCompletedWithWrappedCancellationException(g);
3475 >        }
3476      }
3477  
3478      /**
3479 <     * thenAcceptAsync result completes normally after normal
1822 <     * completion of source
3479 >     * toCompletableFuture returns this CompletableFuture.
3480       */
3481 <    public void testThenAcceptAsyncE() {
3482 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3483 <        IncAction r = new IncAction();
1827 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
1828 <        f.complete(one);
1829 <        checkCompletedNormally(g, null);
1830 <        assertEquals(r.value, 2);
3481 >    public void testToCompletableFuture() {
3482 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3483 >        assertSame(f, f.toCompletableFuture());
3484      }
3485  
3486 <    /**
1834 <     * thenAcceptAsync result completes exceptionally after exceptional
1835 <     * completion of source
1836 <     */
1837 <    public void testThenAcceptAsync2E() {
1838 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1839 <        IncAction r = new IncAction();
1840 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
1841 <        f.completeExceptionally(new CFException());
1842 <        checkCompletedWithWrappedCFException(g);
1843 <    }
3486 >    // jdk9
3487  
3488      /**
3489 <     * thenAcceptAsync result completes exceptionally if action does
3489 >     * newIncompleteFuture returns an incomplete CompletableFuture
3490       */
3491 <    public void testThenAcceptAsync3E() {
3492 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3493 <        FailingConsumer r = new FailingConsumer();
3494 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3495 <        f.complete(null);
3496 <        checkCompletedWithWrappedCFException(g);
1854 <    }
1855 <
1856 <    /**
1857 <     * thenAcceptAsync result completes exceptionally if source cancelled
1858 <     */
1859 <    public void testThenAcceptAsync4E() {
1860 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1861 <        IncAction r = new IncAction();
1862 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
1863 <        assertTrue(f.cancel(true));
1864 <        checkCompletedWithWrappedCancellationException(g);
1865 <    }
1866 <    /**
1867 <     * thenCombineAsync result completes normally after normal
1868 <     * completion of sources
1869 <     */
1870 <    public void testThenCombineAsyncE() {
1871 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1872 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1873 <        CompletableFuture<Integer> g = f.thenCombineAsync(f2, add, new ThreadExecutor());
1874 <        f.complete(one);
3491 >    public void testNewIncompleteFuture() {
3492 >        for (Integer v1 : new Integer[] { 1, null })
3493 >    {
3494 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3495 >        CompletableFuture<Integer> g = f.newIncompleteFuture();
3496 >        checkIncomplete(f);
3497          checkIncomplete(g);
3498 <        f2.complete(two);
3499 <        checkCompletedNormally(g, three);
1878 <    }
1879 <
1880 <    /**
1881 <     * thenCombineAsync result completes exceptionally after exceptional
1882 <     * completion of source
1883 <     */
1884 <    public void testThenCombineAsync2E() {
1885 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1886 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1887 <        CompletableFuture<Integer> g = f.thenCombineAsync(f2, add, new ThreadExecutor());
1888 <        f.completeExceptionally(new CFException());
1889 <        f2.complete(two);
1890 <        checkCompletedWithWrappedCFException(g);
1891 <
1892 <        f = new CompletableFuture<Integer>();
1893 <        f2 = new CompletableFuture<Integer>();
1894 <        g = f.thenCombineAsync(f2, add, new ThreadExecutor());
1895 <        f.complete(one);
1896 <        f2.completeExceptionally(new CFException());
1897 <        checkCompletedWithWrappedCFException(g);
1898 <    }
1899 <
1900 <    /**
1901 <     * thenCombineAsync result completes exceptionally if action does
1902 <     */
1903 <    public void testThenCombineAsync3E() {
1904 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1905 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1906 <        FailingBiFunction r = new FailingBiFunction();
1907 <        CompletableFuture<Integer> g = f.thenCombineAsync(f2, r, new ThreadExecutor());
1908 <        f.complete(one);
3498 >        f.complete(v1);
3499 >        checkCompletedNormally(f, v1);
3500          checkIncomplete(g);
3501 <        f2.complete(two);
3502 <        checkCompletedWithWrappedCFException(g);
3503 <    }
3501 >        g.complete(v1);
3502 >        checkCompletedNormally(g, v1);
3503 >        assertSame(g.getClass(), CompletableFuture.class);
3504 >    }}
3505  
3506      /**
3507 <     * thenCombineAsync result completes exceptionally if either source cancelled
3507 >     * completedStage returns a completed CompletionStage
3508       */
3509 <    public void testThenCombineAsync4E() {
3510 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3511 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3512 <        CompletableFuture<Integer> g = f.thenCombineAsync(f2, add, new ThreadExecutor());
3513 <        assertTrue(f.cancel(true));
3514 <        f2.complete(two);
3515 <        checkCompletedWithWrappedCancellationException(g);
1924 <
1925 <        f = new CompletableFuture<Integer>();
1926 <        f2 = new CompletableFuture<Integer>();
1927 <        g = f.thenCombineAsync(f2, add, new ThreadExecutor());
1928 <        f.complete(one);
1929 <        assertTrue(f2.cancel(true));
1930 <        checkCompletedWithWrappedCancellationException(g);
3509 >    public void testCompletedStage() {
3510 >        AtomicInteger x = new AtomicInteger(0);
3511 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3512 >        CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3513 >        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3514 >        assertEquals(x.get(), 1);
3515 >        assertNull(r.get());
3516      }
3517  
3518      /**
3519 <     * thenAcceptBothAsync result completes normally after normal
3520 <     * completion of sources
3519 >     * defaultExecutor by default returns the commonPool if
3520 >     * it supports more than one thread.
3521       */
3522 <    public void testThenAcceptBothAsyncE() {
3523 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3524 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3525 <        AddAction r = new AddAction();
3526 <        CompletableFuture<Void> g = f.thenAcceptBothAsync(f2, r, new ThreadExecutor());
3527 <        f.complete(one);
3528 <        checkIncomplete(g);
3529 <        f2.complete(two);
1945 <        checkCompletedNormally(g, null);
1946 <        assertEquals(r.value, 3);
3522 >    public void testDefaultExecutor() {
3523 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3524 >        Executor e = f.defaultExecutor();
3525 >        Executor c = ForkJoinPool.commonPool();
3526 >        if (ForkJoinPool.getCommonPoolParallelism() > 1)
3527 >            assertSame(e, c);
3528 >        else
3529 >            assertNotSame(e, c);
3530      }
3531  
3532      /**
3533 <     * thenAcceptBothAsync result completes exceptionally after exceptional
3534 <     * completion of source
3533 >     * failedFuture returns a CompletableFuture completed
3534 >     * exceptionally with the given Exception
3535       */
3536 <    public void testThenAcceptBothAsync2E() {
3537 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3538 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3539 <        AddAction r = new AddAction();
1957 <        CompletableFuture<Void> g = f.thenAcceptBothAsync(f2, r, new ThreadExecutor());
1958 <        f.completeExceptionally(new CFException());
1959 <        f2.complete(two);
1960 <        checkCompletedWithWrappedCFException(g);
1961 <
1962 <        r = new AddAction();
1963 <        f = new CompletableFuture<Integer>();
1964 <        f2 = new CompletableFuture<Integer>();
1965 <        g = f.thenAcceptBothAsync(f2, r, new ThreadExecutor());
1966 <        f.complete(one);
1967 <        f2.completeExceptionally(new CFException());
1968 <        checkCompletedWithWrappedCFException(g);
1969 <    }
1970 <
1971 <    /**
1972 <     * thenAcceptBothAsync result completes exceptionally if action does
1973 <     */
1974 <    public void testThenAcceptBothAsync3E() {
1975 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
1976 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
1977 <        FailingBiConsumer r = new FailingBiConsumer();
1978 <        CompletableFuture<Void> g = f.thenAcceptBothAsync(f2, r, new ThreadExecutor());
1979 <        f.complete(one);
1980 <        checkIncomplete(g);
1981 <        f2.complete(two);
1982 <        checkCompletedWithWrappedCFException(g);
3536 >    public void testFailedFuture() {
3537 >        CFException ex = new CFException();
3538 >        CompletableFuture<Integer> f = CompletableFuture.failedFuture(ex);
3539 >        checkCompletedExceptionally(f, ex);
3540      }
3541  
3542      /**
3543 <     * thenAcceptBothAsync result completes exceptionally if either source cancelled
3543 >     * failedFuture(null) throws NPE
3544       */
3545 <    public void testThenAcceptBothAsync4E() {
3546 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3547 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3548 <        AddAction r = new AddAction();
3549 <        CompletableFuture<Void> g = f.thenAcceptBothAsync(f2, r, new ThreadExecutor());
1993 <        assertTrue(f.cancel(true));
1994 <        f2.complete(two);
1995 <        checkCompletedWithWrappedCancellationException(g);
1996 <
1997 <        r = new AddAction();
1998 <        f = new CompletableFuture<Integer>();
1999 <        f2 = new CompletableFuture<Integer>();
2000 <        g = f.thenAcceptBothAsync(f2, r, new ThreadExecutor());
2001 <        f.complete(one);
2002 <        assertTrue(f2.cancel(true));
2003 <        checkCompletedWithWrappedCancellationException(g);
3545 >    public void testFailedFuture_null() {
3546 >        try {
3547 >            CompletableFuture<Integer> f = CompletableFuture.failedFuture(null);
3548 >            shouldThrow();
3549 >        } catch (NullPointerException success) {}
3550      }
3551  
3552      /**
3553 <     * runAfterBothAsync result completes normally after normal
3554 <     * completion of sources
3553 >     * copy returns a CompletableFuture that is completed normally,
3554 >     * with the same value, when source is.
3555       */
3556 <    public void testRunAfterBothAsyncE() {
3557 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3558 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3559 <        Noop r = new Noop();
2014 <        CompletableFuture<Void> g = f.runAfterBothAsync(f2, r, new ThreadExecutor());
2015 <        f.complete(one);
3556 >    public void testCopy() {
3557 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3558 >        CompletableFuture<Integer> g = f.copy();
3559 >        checkIncomplete(f);
3560          checkIncomplete(g);
3561 <        f2.complete(two);
3562 <        checkCompletedNormally(g, null);
3563 <        assertTrue(r.ran);
3561 >        f.complete(1);
3562 >        checkCompletedNormally(f, 1);
3563 >        checkCompletedNormally(g, 1);
3564      }
3565  
3566      /**
3567 <     * runAfterBothAsync result completes exceptionally after exceptional
3568 <     * completion of source
3567 >     * copy returns a CompletableFuture that is completed exceptionally
3568 >     * when source is.
3569       */
3570 <    public void testRunAfterBothAsync2E() {
3571 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3572 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3573 <        Noop r = new Noop();
2030 <        CompletableFuture<Void> g = f.runAfterBothAsync(f2, r, new ThreadExecutor());
2031 <        f.completeExceptionally(new CFException());
2032 <        f2.complete(two);
2033 <        checkCompletedWithWrappedCFException(g);
2034 <
2035 <        r = new Noop();
2036 <        f = new CompletableFuture<Integer>();
2037 <        f2 = new CompletableFuture<Integer>();
2038 <        g = f.runAfterBothAsync(f2, r, new ThreadExecutor());
2039 <        f.complete(one);
2040 <        f2.completeExceptionally(new CFException());
2041 <        checkCompletedWithWrappedCFException(g);
2042 <    }
2043 <
2044 <    /**
2045 <     * runAfterBothAsync result completes exceptionally if action does
2046 <     */
2047 <    public void testRunAfterBothAsync3E() {
2048 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2049 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2050 <        FailingNoop r = new FailingNoop();
2051 <        CompletableFuture<Void> g = f.runAfterBothAsync(f2, r, new ThreadExecutor());
2052 <        f.complete(one);
3570 >    public void testCopy2() {
3571 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3572 >        CompletableFuture<Integer> g = f.copy();
3573 >        checkIncomplete(f);
3574          checkIncomplete(g);
3575 <        f2.complete(two);
3576 <        checkCompletedWithWrappedCFException(g);
3575 >        CFException ex = new CFException();
3576 >        f.completeExceptionally(ex);
3577 >        checkCompletedExceptionally(f, ex);
3578 >        checkCompletedWithWrappedException(g, ex);
3579      }
3580  
3581      /**
3582 <     * runAfterBothAsync result completes exceptionally if either source cancelled
3582 >     * minimalCompletionStage returns a CompletableFuture that is
3583 >     * completed normally, with the same value, when source is.
3584       */
3585 <    public void testRunAfterBothAsync4E() {
3586 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3587 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3588 <        Noop r = new Noop();
3589 <        CompletableFuture<Void> g = f.runAfterBothAsync(f2, r, new ThreadExecutor());
3590 <        assertTrue(f.cancel(true));
3591 <        f2.complete(two);
3592 <        checkCompletedWithWrappedCancellationException(g);
3593 <
3594 <        r = new Noop();
3595 <        f = new CompletableFuture<Integer>();
2072 <        f2 = new CompletableFuture<Integer>();
2073 <        g = f.runAfterBothAsync(f2, r, new ThreadExecutor());
2074 <        f.complete(one);
2075 <        assertTrue(f2.cancel(true));
2076 <        checkCompletedWithWrappedCancellationException(g);
3585 >    public void testMinimalCompletionStage() {
3586 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3587 >        CompletionStage<Integer> g = f.minimalCompletionStage();
3588 >        AtomicInteger x = new AtomicInteger(0);
3589 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3590 >        checkIncomplete(f);
3591 >        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3592 >        f.complete(1);
3593 >        checkCompletedNormally(f, 1);
3594 >        assertEquals(x.get(), 1);
3595 >        assertNull(r.get());
3596      }
3597  
3598      /**
3599 <     * applyToEitherAsync result completes normally after normal
3600 <     * completion of sources
3599 >     * minimalCompletionStage returns a CompletableFuture that is
3600 >     * completed exceptionally when source is.
3601       */
3602 <    public void testApplyToEitherAsyncE() {
3603 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3604 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3605 <        CompletableFuture<Integer> g = f.applyToEitherAsync(f2, inc, new ThreadExecutor());
3606 <        f.complete(one);
3607 <        checkCompletedNormally(g, two);
3608 <
3609 <        f = new CompletableFuture<Integer>();
3610 <        f.complete(one);
3611 <        f2 = new CompletableFuture<Integer>();
3612 <        g = f.applyToEitherAsync(f2, inc, new ThreadExecutor());
3613 <        checkCompletedNormally(g, two);
3602 >    public void testMinimalCompletionStage2() {
3603 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3604 >        CompletionStage<Integer> g = f.minimalCompletionStage();
3605 >        AtomicInteger x = new AtomicInteger(0);
3606 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3607 >        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3608 >        checkIncomplete(f);
3609 >        CFException ex = new CFException();
3610 >        f.completeExceptionally(ex);
3611 >        checkCompletedExceptionally(f, ex);
3612 >        assertEquals(x.get(), 0);
3613 >        assertEquals(r.get().getCause(), ex);
3614      }
3615  
3616      /**
3617 <     * applyToEitherAsync result completes exceptionally after exceptional
3618 <     * completion of source
3617 >     * failedStage returns a CompletionStage completed
3618 >     * exceptionally with the given Exception
3619       */
3620 <    public void testApplyToEitherAsync2E() {
3621 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3622 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3623 <        CompletableFuture<Integer> g = f.applyToEitherAsync(f2, inc, new ThreadExecutor());
3624 <        f.completeExceptionally(new CFException());
3625 <        checkCompletedWithWrappedCFException(g);
3626 <
3627 <        f = new CompletableFuture<Integer>();
2109 <        f2 = new CompletableFuture<Integer>();
2110 <        f2.completeExceptionally(new CFException());
2111 <        g = f.applyToEitherAsync(f2, inc, new ThreadExecutor());
2112 <        f.complete(one);
2113 <        checkCompletedWithWrappedCFException(g);
3620 >    public void testFailedStage() {
3621 >        CFException ex = new CFException();
3622 >        CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3623 >        AtomicInteger x = new AtomicInteger(0);
3624 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3625 >        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3626 >        assertEquals(x.get(), 0);
3627 >        assertEquals(r.get(), ex);
3628      }
3629  
3630      /**
3631 <     * applyToEitherAsync result completes exceptionally if action does
3631 >     * completeAsync completes with value of given supplier
3632       */
3633 <    public void testApplyToEitherAsync3E() {
3634 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3635 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3636 <        FailingFunction r = new FailingFunction();
3637 <        CompletableFuture<Integer> g = f.applyToEitherAsync(f2, r, new ThreadExecutor());
3638 <        f.complete(one);
3639 <        checkCompletedWithWrappedCFException(g);
3640 <    }
3633 >    public void testCompleteAsync() {
3634 >        for (Integer v1 : new Integer[] { 1, null })
3635 >    {
3636 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3637 >        f.completeAsync(() -> v1);
3638 >        f.join();
3639 >        checkCompletedNormally(f, v1);
3640 >    }}
3641  
3642      /**
3643 <     * applyToEitherAsync result completes exceptionally if either source cancelled
3643 >     * completeAsync completes exceptionally if given supplier throws
3644       */
3645 <    public void testApplyToEitherAsync4E() {
3646 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3647 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3648 <        CompletableFuture<Integer> g = f.applyToEitherAsync(f2, inc, new ThreadExecutor());
3649 <        assertTrue(f.cancel(true));
3650 <        checkCompletedWithWrappedCancellationException(g);
3651 <
3652 <        f = new CompletableFuture<Integer>();
3653 <        f2 = new CompletableFuture<Integer>();
2140 <        assertTrue(f2.cancel(true));
2141 <        g = f.applyToEitherAsync(f2, inc, new ThreadExecutor());
2142 <        checkCompletedWithWrappedCancellationException(g);
3645 >    public void testCompleteAsync2() {
3646 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3647 >        CFException ex = new CFException();
3648 >        f.completeAsync(() -> {if (true) throw ex; return 1;});
3649 >        try {
3650 >            f.join();
3651 >            shouldThrow();
3652 >        } catch (CompletionException success) {}
3653 >        checkCompletedWithWrappedException(f, ex);
3654      }
3655  
3656      /**
3657 <     * acceptEitherAsync result completes normally after normal
2147 <     * completion of sources
3657 >     * completeAsync with given executor completes with value of given supplier
3658       */
3659 <    public void testAcceptEitherAsyncE() {
3660 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3661 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3662 <        IncAction r = new IncAction();
3663 <        CompletableFuture<Void> g = f.acceptEitherAsync(f2, r, new ThreadExecutor());
3664 <        f.complete(one);
3665 <        checkCompletedNormally(g, null);
3666 <        assertEquals(r.value, 2);
3667 <
3668 <        r = new IncAction();
2159 <        f = new CompletableFuture<Integer>();
2160 <        f.complete(one);
2161 <        f2 = new CompletableFuture<Integer>();
2162 <        g = f.acceptEitherAsync(f2, r, new ThreadExecutor());
2163 <        checkCompletedNormally(g, null);
2164 <        assertEquals(r.value, 2);
2165 <    }
3659 >    public void testCompleteAsync3() {
3660 >        for (Integer v1 : new Integer[] { 1, null })
3661 >    {
3662 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3663 >        ThreadExecutor executor = new ThreadExecutor();
3664 >        f.completeAsync(() -> v1, executor);
3665 >        assertSame(v1, f.join());
3666 >        checkCompletedNormally(f, v1);
3667 >        assertEquals(1, executor.count.get());
3668 >    }}
3669  
3670      /**
3671 <     * acceptEitherAsync result completes exceptionally after exceptional
3672 <     * completion of source
3671 >     * completeAsync with given executor completes exceptionally if
3672 >     * given supplier throws
3673       */
3674 <    public void testAcceptEitherAsync2E() {
3675 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3676 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3677 <        IncAction r = new IncAction();
3678 <        CompletableFuture<Void> g = f.acceptEitherAsync(f2, r, new ThreadExecutor());
3679 <        f.completeExceptionally(new CFException());
3680 <        checkCompletedWithWrappedCFException(g);
3674 >    public void testCompleteAsync4() {
3675 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3676 >        CFException ex = new CFException();
3677 >        ThreadExecutor executor = new ThreadExecutor();
3678 >        f.completeAsync(() -> {if (true) throw ex; return 1;}, executor);
3679 >        try {
3680 >            f.join();
3681 >            shouldThrow();
3682 >        } catch (CompletionException success) {}
3683 >        checkCompletedWithWrappedException(f, ex);
3684 >        assertEquals(1, executor.count.get());
3685 >    }
3686 >
3687 >    /**
3688 >     * orTimeout completes with TimeoutException if not complete
3689 >     */
3690 >    public void testOrTimeout_timesOut() {
3691 >        long timeoutMillis = timeoutMillis();
3692 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3693 >        long startTime = System.nanoTime();
3694 >        assertSame(f, f.orTimeout(timeoutMillis, MILLISECONDS));
3695 >        checkCompletedWithTimeoutException(f);
3696 >        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3697 >    }
3698 >
3699 >    /**
3700 >     * orTimeout completes normally if completed before timeout
3701 >     */
3702 >    public void testOrTimeout_completed() {
3703 >        for (Integer v1 : new Integer[] { 1, null })
3704 >    {
3705 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3706 >        CompletableFuture<Integer> g = new CompletableFuture<>();
3707 >        long startTime = System.nanoTime();
3708 >        f.complete(v1);
3709 >        assertSame(f, f.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3710 >        assertSame(g, g.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3711 >        g.complete(v1);
3712 >        checkCompletedNormally(f, v1);
3713 >        checkCompletedNormally(g, v1);
3714 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3715 >    }}
3716 >
3717 >    /**
3718 >     * completeOnTimeout completes with given value if not complete
3719 >     */
3720 >    public void testCompleteOnTimeout_timesOut() {
3721 >        testInParallel(() -> testCompleteOnTimeout_timesOut(42),
3722 >                       () -> testCompleteOnTimeout_timesOut(null));
3723 >    }
3724 >
3725 >    /**
3726 >     * completeOnTimeout completes with given value if not complete
3727 >     */
3728 >    public void testCompleteOnTimeout_timesOut(Integer v) {
3729 >        long timeoutMillis = timeoutMillis();
3730 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3731 >        long startTime = System.nanoTime();
3732 >        assertSame(f, f.completeOnTimeout(v, timeoutMillis, MILLISECONDS));
3733 >        assertSame(v, f.join());
3734 >        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3735 >        f.complete(99);         // should have no effect
3736 >        checkCompletedNormally(f, v);
3737 >    }
3738 >
3739 >    /**
3740 >     * completeOnTimeout has no effect if completed within timeout
3741 >     */
3742 >    public void testCompleteOnTimeout_completed() {
3743 >        for (Integer v1 : new Integer[] { 1, null })
3744 >    {
3745 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3746 >        CompletableFuture<Integer> g = new CompletableFuture<>();
3747 >        long startTime = System.nanoTime();
3748 >        f.complete(v1);
3749 >        assertSame(f, f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3750 >        assertSame(g, g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3751 >        g.complete(v1);
3752 >        checkCompletedNormally(f, v1);
3753 >        checkCompletedNormally(g, v1);
3754 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3755 >    }}
3756 >
3757 >    /**
3758 >     * delayedExecutor returns an executor that delays submission
3759 >     */
3760 >    public void testDelayedExecutor() {
3761 >        testInParallel(() -> testDelayedExecutor(null, null),
3762 >                       () -> testDelayedExecutor(null, 1),
3763 >                       () -> testDelayedExecutor(new ThreadExecutor(), 1),
3764 >                       () -> testDelayedExecutor(new ThreadExecutor(), 1));
3765 >    }
3766 >
3767 >    public void testDelayedExecutor(Executor executor, Integer v) throws Exception {
3768 >        long timeoutMillis = timeoutMillis();
3769 >        // Use an "unreasonably long" long timeout to catch lingering threads
3770 >        long longTimeoutMillis = 1000 * 60 * 60 * 24;
3771 >        final Executor delayer, longDelayer;
3772 >        if (executor == null) {
3773 >            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS);
3774 >            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS);
3775 >        } else {
3776 >            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS, executor);
3777 >            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS, executor);
3778 >        }
3779 >        long startTime = System.nanoTime();
3780 >        CompletableFuture<Integer> f =
3781 >            CompletableFuture.supplyAsync(() -> v, delayer);
3782 >        CompletableFuture<Integer> g =
3783 >            CompletableFuture.supplyAsync(() -> v, longDelayer);
3784 >
3785 >        assertNull(g.getNow(null));
3786 >
3787 >        assertSame(v, f.get(LONG_DELAY_MS, MILLISECONDS));
3788 >        long millisElapsed = millisElapsedSince(startTime);
3789 >        assertTrue(millisElapsed >= timeoutMillis);
3790 >        assertTrue(millisElapsed < LONG_DELAY_MS / 2);
3791  
3792 <        r = new IncAction();
2180 <        f = new CompletableFuture<Integer>();
2181 <        f2 = new CompletableFuture<Integer>();
2182 <        f2.completeExceptionally(new CFException());
2183 <        g = f.acceptEitherAsync(f2, r, new ThreadExecutor());
2184 <        f.complete(one);
2185 <        checkCompletedWithWrappedCFException(g);
2186 <    }
3792 >        checkCompletedNormally(f, v);
3793  
3794 <    /**
3795 <     * acceptEitherAsync result completes exceptionally if action does
2190 <     */
2191 <    public void testAcceptEitherAsync3E() {
2192 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2193 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2194 <        FailingConsumer r = new FailingConsumer();
2195 <        CompletableFuture<Void> g = f.acceptEitherAsync(f2, r, new ThreadExecutor());
2196 <        f.complete(one);
2197 <        checkCompletedWithWrappedCFException(g);
3794 >        checkIncomplete(g);
3795 >        assertTrue(g.cancel(true));
3796      }
3797  
3798 <    /**
2201 <     * acceptEitherAsync result completes exceptionally if either
2202 <     * source cancelled
2203 <     */
2204 <    public void testAcceptEitherAsync4E() {
2205 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2206 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2207 <        IncAction r = new IncAction();
2208 <        CompletableFuture<Void> g = f.acceptEitherAsync(f2, r, new ThreadExecutor());
2209 <        assertTrue(f.cancel(true));
2210 <        checkCompletedWithWrappedCancellationException(g);
3798 >    //--- tests of implementation details; not part of official tck ---
3799  
3800 <        r = new IncAction();
3801 <        f = new CompletableFuture<Integer>();
3802 <        f2 = new CompletableFuture<Integer>();
3803 <        assertTrue(f2.cancel(true));
3804 <        g = f.acceptEitherAsync(f2, r, new ThreadExecutor());
3805 <        checkCompletedWithWrappedCancellationException(g);
3806 <    }
3807 <
3808 <    /**
2221 <     * runAfterEitherAsync result completes normally after normal
2222 <     * completion of sources
2223 <     */
2224 <    public void testRunAfterEitherAsyncE() {
2225 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
2226 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
2227 <        Noop r = new Noop();
2228 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
2229 <        f.complete(one);
2230 <        checkCompletedNormally(g, null);
2231 <        assertTrue(r.ran);
3800 >    Object resultOf(CompletableFuture<?> f) {
3801 >        SecurityManager sm = System.getSecurityManager();
3802 >        if (sm != null) {
3803 >            try {
3804 >                System.setSecurityManager(null);
3805 >            } catch (SecurityException giveUp) {
3806 >                return "Reflection not available";
3807 >            }
3808 >        }
3809  
3810 <        r = new Noop();
3811 <        f = new CompletableFuture<Integer>();
3812 <        f.complete(one);
3813 <        f2 = new CompletableFuture<Integer>();
3814 <        g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
3815 <        checkCompletedNormally(g, null);
3816 <        assertTrue(r.ran);
3810 >        try {
3811 >            java.lang.reflect.Field resultField
3812 >                = CompletableFuture.class.getDeclaredField("result");
3813 >            resultField.setAccessible(true);
3814 >            return resultField.get(f);
3815 >        } catch (Throwable t) {
3816 >            throw new AssertionError(t);
3817 >        } finally {
3818 >            if (sm != null) System.setSecurityManager(sm);
3819 >        }
3820      }
3821  
3822 <    /**
3823 <     * runAfterEitherAsync result completes exceptionally after exceptional
3824 <     * completion of source
3825 <     */
3826 <    public void testRunAfterEitherAsync2E() {
3827 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3828 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3829 <        Noop r = new Noop();
3830 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
3831 <        f.completeExceptionally(new CFException());
3832 <        checkCompletedWithWrappedCFException(g);
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);
3841 <    }
3822 >    public void testExceptionPropagationReusesResultObject() {
3823 >        if (!testImplementationDetails) return;
3824 >        for (ExecutionMode m : ExecutionMode.values())
3825 >    {
3826 >        final CFException ex = new CFException();
3827 >        final CompletableFuture<Integer> v42 = CompletableFuture.completedFuture(42);
3828 >        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3829 >
3830 >        List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> funs
3831 >            = new ArrayList<>();
3832 >
3833 >        funs.add((y) -> m.thenRun(y, new Noop(m)));
3834 >        funs.add((y) -> m.thenAccept(y, new NoopConsumer(m)));
3835 >        funs.add((y) -> m.thenApply(y, new IncFunction(m)));
3836 >
3837 >        funs.add((y) -> m.runAfterEither(y, incomplete, new Noop(m)));
3838 >        funs.add((y) -> m.acceptEither(y, incomplete, new NoopConsumer(m)));
3839 >        funs.add((y) -> m.applyToEither(y, incomplete, new IncFunction(m)));
3840 >
3841 >        funs.add((y) -> m.runAfterBoth(y, v42, new Noop(m)));
3842 >        funs.add((y) -> m.runAfterBoth(v42, y, new Noop(m)));
3843 >        funs.add((y) -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3844 >        funs.add((y) -> m.thenAcceptBoth(v42, y, new SubtractAction(m)));
3845 >        funs.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m)));
3846 >        funs.add((y) -> m.thenCombine(v42, y, new SubtractFunction(m)));
3847 >
3848 >        funs.add((y) -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
3849 >
3850 >        funs.add((y) -> m.thenCompose(y, new CompletableFutureInc(m)));
3851 >
3852 >        funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y}));
3853 >        funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y, v42}));
3854 >        funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {v42, y}));
3855 >        funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y}));
3856 >        funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y, incomplete}));
3857 >        funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {incomplete, y}));
3858 >
3859 >        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3860 >                 fun : funs) {
3861 >            CompletableFuture<Integer> f = new CompletableFuture<>();
3862 >            f.completeExceptionally(ex);
3863 >            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3864 >            checkCompletedWithWrappedException(src, ex);
3865 >            CompletableFuture<?> dep = fun.apply(src);
3866 >            checkCompletedWithWrappedException(dep, ex);
3867 >            assertSame(resultOf(src), resultOf(dep));
3868 >        }
3869  
3870 <    /**
3871 <     * runAfterEitherAsync result completes exceptionally if action does
3872 <     */
3873 <    public void testRunAfterEitherAsync3E() {
3874 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3875 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3876 <        FailingNoop r = new FailingNoop();
3877 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
3878 <        f.complete(one);
3879 <        checkCompletedWithWrappedCFException(g);
2273 <    }
3870 >        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3871 >                 fun : funs) {
3872 >            CompletableFuture<Integer> f = new CompletableFuture<>();
3873 >            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3874 >            CompletableFuture<?> dep = fun.apply(src);
3875 >            f.completeExceptionally(ex);
3876 >            checkCompletedWithWrappedException(src, ex);
3877 >            checkCompletedWithWrappedException(dep, ex);
3878 >            assertSame(resultOf(src), resultOf(dep));
3879 >        }
3880  
3881 <    /**
3882 <     * runAfterEitherAsync result completes exceptionally if either
3883 <     * source cancelled
3884 <     */
3885 <    public void testRunAfterEitherAsync4E() {
3886 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3887 <        CompletableFuture<Integer> f2 = new CompletableFuture<Integer>();
3888 <        Noop r = new Noop();
3889 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
3890 <        assertTrue(f.cancel(true));
3891 <        checkCompletedWithWrappedCancellationException(g);
3881 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3882 >        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3883 >                 fun : funs) {
3884 >            CompletableFuture<Integer> f = new CompletableFuture<>();
3885 >            f.cancel(mayInterruptIfRunning);
3886 >            checkCancelled(f);
3887 >            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3888 >            checkCompletedWithWrappedCancellationException(src);
3889 >            CompletableFuture<?> dep = fun.apply(src);
3890 >            checkCompletedWithWrappedCancellationException(dep);
3891 >            assertSame(resultOf(src), resultOf(dep));
3892 >        }
3893  
3894 <        r = new Noop();
3895 <        f = new CompletableFuture<Integer>();
3896 <        f2 = new CompletableFuture<Integer>();
3897 <        assertTrue(f2.cancel(true));
3898 <        g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
3899 <        checkCompletedWithWrappedCancellationException(g);
3900 <    }
3894 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3895 >        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3896 >                 fun : funs) {
3897 >            CompletableFuture<Integer> f = new CompletableFuture<>();
3898 >            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3899 >            CompletableFuture<?> dep = fun.apply(src);
3900 >            f.cancel(mayInterruptIfRunning);
3901 >            checkCancelled(f);
3902 >            checkCompletedWithWrappedCancellationException(src);
3903 >            checkCompletedWithWrappedCancellationException(dep);
3904 >            assertSame(resultOf(src), resultOf(dep));
3905 >        }
3906 >    }}
3907  
3908      /**
3909 <     * thenComposeAsync result completes normally after normal
2297 <     * completion of source
3909 >     * Minimal completion stages throw UOE for all non-CompletionStage methods
3910       */
3911 <    public void testThenComposeAsyncE() {
3912 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3913 <        CompletableFutureInc r = new CompletableFutureInc();
3914 <        CompletableFuture<Integer> g = f.thenComposeAsync(r, new ThreadExecutor());
3915 <        f.complete(one);
3916 <        checkCompletedNormally(g, two);
3911 >    public void testMinimalCompletionStage_minimality() {
3912 >        if (!testImplementationDetails) return;
3913 >        Function<Method, String> toSignature =
3914 >            (method) -> method.getName() + Arrays.toString(method.getParameterTypes());
3915 >        Predicate<Method> isNotStatic =
3916 >            (method) -> (method.getModifiers() & Modifier.STATIC) == 0;
3917 >        List<Method> minimalMethods =
3918 >            Stream.of(Object.class, CompletionStage.class)
3919 >            .flatMap((klazz) -> Stream.of(klazz.getMethods()))
3920 >            .filter(isNotStatic)
3921 >            .collect(Collectors.toList());
3922 >        // Methods from CompletableFuture permitted NOT to throw UOE
3923 >        String[] signatureWhitelist = {
3924 >            "newIncompleteFuture[]",
3925 >            "defaultExecutor[]",
3926 >            "minimalCompletionStage[]",
3927 >            "copy[]",
3928 >        };
3929 >        Set<String> permittedMethodSignatures =
3930 >            Stream.concat(minimalMethods.stream().map(toSignature),
3931 >                          Stream.of(signatureWhitelist))
3932 >            .collect(Collectors.toSet());
3933 >        List<Method> allMethods = Stream.of(CompletableFuture.class.getMethods())
3934 >            .filter(isNotStatic)
3935 >            .filter((method) -> !permittedMethodSignatures.contains(toSignature.apply(method)))
3936 >            .collect(Collectors.toList());
3937 >
3938 >        CompletionStage<Integer> minimalStage =
3939 >            new CompletableFuture<Integer>().minimalCompletionStage();
3940 >
3941 >        List<Method> bugs = new ArrayList<>();
3942 >        for (Method method : allMethods) {
3943 >            Class<?>[] parameterTypes = method.getParameterTypes();
3944 >            Object[] args = new Object[parameterTypes.length];
3945 >            // Manufacture boxed primitives for primitive params
3946 >            for (int i = 0; i < args.length; i++) {
3947 >                Class<?> type = parameterTypes[i];
3948 >                if (parameterTypes[i] == boolean.class)
3949 >                    args[i] = false;
3950 >                else if (parameterTypes[i] == int.class)
3951 >                    args[i] = 0;
3952 >                else if (parameterTypes[i] == long.class)
3953 >                    args[i] = 0L;
3954 >            }
3955 >            try {
3956 >                method.invoke(minimalStage, args);
3957 >                bugs.add(method);
3958 >            }
3959 >            catch (java.lang.reflect.InvocationTargetException expected) {
3960 >                if (! (expected.getCause() instanceof UnsupportedOperationException)) {
3961 >                    bugs.add(method);
3962 >                    // expected.getCause().printStackTrace();
3963 >                }
3964 >            }
3965 >            catch (ReflectiveOperationException bad) { throw new Error(bad); }
3966 >        }
3967 >        if (!bugs.isEmpty())
3968 >            throw new Error("Methods did not throw UOE: " + bugs.toString());
3969      }
3970  
3971 <    /**
3972 <     * thenComposeAsync result completes exceptionally after
3973 <     * exceptional completion of source
3974 <     */
3975 <    public void testThenComposeAsync2E() {
3976 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3977 <        CompletableFutureInc r = new CompletableFutureInc();
3978 <        CompletableFuture<Integer> g = f.thenComposeAsync(r, new ThreadExecutor());
3979 <        f.completeExceptionally(new CFException());
3980 <        checkCompletedWithWrappedCFException(g);
3981 <    }
3971 >    static class Monad {
3972 >        static class ZeroException extends RuntimeException {
3973 >            public ZeroException() { super("monadic zero"); }
3974 >        }
3975 >        // "return", "unit"
3976 >        static <T> CompletableFuture<T> unit(T value) {
3977 >            return completedFuture(value);
3978 >        }
3979 >        // monadic zero ?
3980 >        static <T> CompletableFuture<T> zero() {
3981 >            return failedFuture(new ZeroException());
3982 >        }
3983 >        // >=>
3984 >        static <T,U,V> Function<T, CompletableFuture<V>> compose
3985 >            (Function<T, CompletableFuture<U>> f,
3986 >             Function<U, CompletableFuture<V>> g) {
3987 >            return (x) -> f.apply(x).thenCompose(g);
3988 >        }
3989  
3990 <    /**
3991 <     * thenComposeAsync result completes exceptionally if action does
3992 <     */
3993 <    public void testThenComposeAsync3E() {
3994 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
3995 <        FailingCompletableFutureFunction r = new FailingCompletableFutureFunction();
3996 <        CompletableFuture<Integer> g = f.thenComposeAsync(r, new ThreadExecutor());
3997 <        f.complete(one);
2327 <        checkCompletedWithWrappedCFException(g);
2328 <    }
3990 >        static void assertZero(CompletableFuture<?> f) {
3991 >            try {
3992 >                f.getNow(null);
3993 >                throw new AssertionFailedError("should throw");
3994 >            } catch (CompletionException success) {
3995 >                assertTrue(success.getCause() instanceof ZeroException);
3996 >            }
3997 >        }
3998  
3999 <    /**
4000 <     * thenComposeAsync result completes exceptionally if source cancelled
4001 <     */
4002 <    public void testThenComposeAsync4E() {
4003 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
4004 <        CompletableFutureInc r = new CompletableFutureInc();
4005 <        CompletableFuture<Integer> g = f.thenComposeAsync(r, new ThreadExecutor());
4006 <        assertTrue(f.cancel(true));
4007 <        checkCompletedWithWrappedCancellationException(g);
4008 <    }
3999 >        static <T> void assertFutureEquals(CompletableFuture<T> f,
4000 >                                           CompletableFuture<T> g) {
4001 >            T fval = null, gval = null;
4002 >            Throwable fex = null, gex = null;
4003 >
4004 >            try { fval = f.get(); }
4005 >            catch (ExecutionException ex) { fex = ex.getCause(); }
4006 >            catch (Throwable ex) { fex = ex; }
4007 >
4008 >            try { gval = g.get(); }
4009 >            catch (ExecutionException ex) { gex = ex.getCause(); }
4010 >            catch (Throwable ex) { gex = ex; }
4011 >
4012 >            if (fex != null || gex != null)
4013 >                assertSame(fex.getClass(), gex.getClass());
4014 >            else
4015 >                assertEquals(fval, gval);
4016 >        }
4017  
4018 <    // other static methods
4018 >        static class PlusFuture<T> extends CompletableFuture<T> {
4019 >            AtomicReference<Throwable> firstFailure = new AtomicReference<>(null);
4020 >        }
4021  
4022 <    /**
4023 <     * allOf(no component futures) returns a future completed normally
4024 <     * with the value null
4025 <     */
4026 <    public void testAllOf_empty() throws Exception {
4027 <        CompletableFuture<?> f = CompletableFuture.allOf();
4028 <        checkCompletedNormally(f, null);
4022 >        /** Implements "monadic plus". */
4023 >        static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f,
4024 >                                             CompletableFuture<? extends T> g) {
4025 >            PlusFuture<T> plus = new PlusFuture<T>();
4026 >            BiConsumer<T, Throwable> action = (T result, Throwable ex) -> {
4027 >                try {
4028 >                    if (ex == null) {
4029 >                        if (plus.complete(result))
4030 >                            if (plus.firstFailure.get() != null)
4031 >                                plus.firstFailure.set(null);
4032 >                    }
4033 >                    else if (plus.firstFailure.compareAndSet(null, ex)) {
4034 >                        if (plus.isDone())
4035 >                            plus.firstFailure.set(null);
4036 >                    }
4037 >                    else {
4038 >                        // first failure has precedence
4039 >                        Throwable first = plus.firstFailure.getAndSet(null);
4040 >
4041 >                        // may fail with "Self-suppression not permitted"
4042 >                        try { first.addSuppressed(ex); }
4043 >                        catch (Exception ignored) {}
4044 >
4045 >                        plus.completeExceptionally(first);
4046 >                    }
4047 >                } catch (Throwable unexpected) {
4048 >                    plus.completeExceptionally(unexpected);
4049 >                }
4050 >            };
4051 >            f.whenComplete(action);
4052 >            g.whenComplete(action);
4053 >            return plus;
4054 >        }
4055      }
4056  
4057      /**
4058 <     * allOf returns a future completed when all components complete
4058 >     * CompletableFuture is an additive monad - sort of.
4059 >     * https://en.wikipedia.org/wiki/Monad_(functional_programming)#Additive_monads
4060       */
4061 <    public void testAllOf() throws Exception {
4062 <        for (int k = 1; k < 20; ++k) {
4063 <            CompletableFuture[] fs = new CompletableFuture[k];
4064 <            for (int i = 0; i < k; ++i)
4065 <                fs[i] = new CompletableFuture<Integer>();
4066 <            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
4067 <            for (int i = 0; i < k; ++i) {
4068 <                checkIncomplete(f);
4069 <                fs[i].complete(one);
4070 <            }
4071 <            checkCompletedNormally(f, null);
4061 >    public void testAdditiveMonad() throws Throwable {
4062 >        Function<Long, CompletableFuture<Long>> unit = Monad::unit;
4063 >        CompletableFuture<Long> zero = Monad.zero();
4064 >
4065 >        // Some mutually non-commutative functions
4066 >        Function<Long, CompletableFuture<Long>> triple
4067 >            = (x) -> Monad.unit(3 * x);
4068 >        Function<Long, CompletableFuture<Long>> inc
4069 >            = (x) -> Monad.unit(x + 1);
4070 >
4071 >        // unit is a right identity: m >>= unit === m
4072 >        Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
4073 >                                 inc.apply(5L));
4074 >        // unit is a left identity: (unit x) >>= f === f x
4075 >        Monad.assertFutureEquals(unit.apply(5L).thenCompose(inc),
4076 >                                 inc.apply(5L));
4077 >
4078 >        // associativity: (m >>= f) >>= g === m >>= ( \x -> (f x >>= g) )
4079 >        Monad.assertFutureEquals(
4080 >            unit.apply(5L).thenCompose(inc).thenCompose(triple),
4081 >            unit.apply(5L).thenCompose((x) -> inc.apply(x).thenCompose(triple)));
4082 >
4083 >        // The case for CompletableFuture as an additive monad is weaker...
4084 >
4085 >        // zero is a monadic zero
4086 >        Monad.assertZero(zero);
4087 >
4088 >        // left zero: zero >>= f === zero
4089 >        Monad.assertZero(zero.thenCompose(inc));
4090 >        // right zero: f >>= (\x -> zero) === zero
4091 >        Monad.assertZero(inc.apply(5L).thenCompose((x) -> zero));
4092 >
4093 >        // f plus zero === f
4094 >        Monad.assertFutureEquals(Monad.unit(5L),
4095 >                                 Monad.plus(Monad.unit(5L), zero));
4096 >        // zero plus f === f
4097 >        Monad.assertFutureEquals(Monad.unit(5L),
4098 >                                 Monad.plus(zero, Monad.unit(5L)));
4099 >        // zero plus zero === zero
4100 >        Monad.assertZero(Monad.plus(zero, zero));
4101 >        {
4102 >            CompletableFuture<Long> f = Monad.plus(Monad.unit(5L),
4103 >                                                   Monad.unit(8L));
4104 >            // non-determinism
4105 >            assertTrue(f.get() == 5L || f.get() == 8L);
4106          }
2367    }
4107  
4108 <    /**
4109 <     * anyOf(no component futures) returns an incomplete future
4110 <     */
4111 <    public void testAnyOf_empty() throws Exception {
4112 <        CompletableFuture<?> f = CompletableFuture.anyOf();
4113 <        checkIncomplete(f);
4108 >        CompletableFuture<Long> godot = new CompletableFuture<>();
4109 >        // f plus godot === f (doesn't wait for godot)
4110 >        Monad.assertFutureEquals(Monad.unit(5L),
4111 >                                 Monad.plus(Monad.unit(5L), godot));
4112 >        // godot plus f === f (doesn't wait for godot)
4113 >        Monad.assertFutureEquals(Monad.unit(5L),
4114 >                                 Monad.plus(godot, Monad.unit(5L)));
4115      }
4116  
4117      /**
4118 <     * anyOf returns a future completed when any components complete
4119 <     */
4120 <    public void testAnyOf() throws Exception {
4121 <        for (int k = 1; k < 20; ++k) {
4122 <            CompletableFuture[] fs = new CompletableFuture[k];
4123 <            for (int i = 0; i < k; ++i)
4124 <                fs[i] = new CompletableFuture<Integer>();
4125 <            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
4126 <            checkIncomplete(f);
4127 <            for (int i = 0; i < k; ++i) {
4128 <                fs[i].complete(one);
4129 <                checkCompletedNormally(f, one);
4130 <            }
4118 >     * A single CompletableFuture with many dependents.
4119 >     * A demo of scalability - runtime is O(n).
4120 >     */
4121 >    public void testManyDependents() throws Throwable {
4122 >        final int n = 1_000;
4123 >        final CompletableFuture<Void> head = new CompletableFuture<>();
4124 >        final CompletableFuture<Void> complete = CompletableFuture.completedFuture((Void)null);
4125 >        final AtomicInteger count = new AtomicInteger(0);
4126 >        for (int i = 0; i < n; i++) {
4127 >            head.thenRun(() -> count.getAndIncrement());
4128 >            head.thenAccept((x) -> count.getAndIncrement());
4129 >            head.thenApply((x) -> count.getAndIncrement());
4130 >
4131 >            head.runAfterBoth(complete, () -> count.getAndIncrement());
4132 >            head.thenAcceptBoth(complete, (x, y) -> count.getAndIncrement());
4133 >            head.thenCombine(complete, (x, y) -> count.getAndIncrement());
4134 >            complete.runAfterBoth(head, () -> count.getAndIncrement());
4135 >            complete.thenAcceptBoth(head, (x, y) -> count.getAndIncrement());
4136 >            complete.thenCombine(head, (x, y) -> count.getAndIncrement());
4137 >
4138 >            head.runAfterEither(new CompletableFuture<Void>(), () -> count.getAndIncrement());
4139 >            head.acceptEither(new CompletableFuture<Void>(), (x) -> count.getAndIncrement());
4140 >            head.applyToEither(new CompletableFuture<Void>(), (x) -> count.getAndIncrement());
4141 >            new CompletableFuture<Void>().runAfterEither(head, () -> count.getAndIncrement());
4142 >            new CompletableFuture<Void>().acceptEither(head, (x) -> count.getAndIncrement());
4143 >            new CompletableFuture<Void>().applyToEither(head, (x) -> count.getAndIncrement());
4144          }
4145 +        head.complete(null);
4146 +        assertEquals(5 * 3 * n, count.get());
4147      }
4148  
4149 <    /**
4150 <     * Completion methods throw NullPointerException with null arguments
4151 <     */
4152 <    public void testNPE() {
4153 <        CompletableFuture<Integer> f = new CompletableFuture<Integer>();
4154 <        CompletableFuture<Integer> g = new CompletableFuture<Integer>();
4155 <        CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
4156 <        CompletableFuture<?> h;
4157 <        Executor exec = new ThreadExecutor();
4158 <
4159 <        Runnable[] throwingActions = {
4160 <            () -> { CompletableFuture.supplyAsync(null); },
4161 <            () -> { CompletableFuture.supplyAsync(null, exec); },
4162 <            () -> { CompletableFuture.supplyAsync(() -> one, null); },
4163 <
4164 <            () -> { CompletableFuture.runAsync(null); },
4165 <            () -> { CompletableFuture.runAsync(null, exec); },
4166 <            () -> { CompletableFuture.runAsync(() -> {}, null); },
4167 <
4168 <            () -> { f.completeExceptionally(null); },
4169 <
4170 <            () -> { f.thenApply(null); },
4171 <            () -> { f.thenApplyAsync(null); },
2417 <            () -> { f.thenApplyAsync((x) -> x, null); },
2418 <            () -> { f.thenApplyAsync(null, exec); },
2419 <
2420 <            () -> { f.thenAccept(null); },
2421 <            () -> { f.thenAcceptAsync(null); },
2422 <            () -> { f.thenAcceptAsync((x) -> { ; }, null); },
2423 <            () -> { f.thenAcceptAsync(null, exec); },
2424 <
2425 <            () -> { f.thenRun(null); },
2426 <            () -> { f.thenRunAsync(null); },
2427 <            () -> { f.thenRunAsync(() -> { ; }, null); },
2428 <            () -> { f.thenRunAsync(null, exec); },
2429 <
2430 <            () -> { f.thenCombine(g, null); },
2431 <            () -> { f.thenCombineAsync(g, null); },
2432 <            () -> { f.thenCombineAsync(g, null, exec); },
2433 <            () -> { f.thenCombine(nullFuture, (x, y) -> x); },
2434 <            () -> { f.thenCombineAsync(nullFuture, (x, y) -> x); },
2435 <            () -> { f.thenCombineAsync(nullFuture, (x, y) -> x, exec); },
2436 <            () -> { f.thenCombineAsync(g, (x, y) -> x, null); },
2437 <
2438 <            () -> { f.thenAcceptBoth(g, null); },
2439 <            () -> { f.thenAcceptBothAsync(g, null); },
2440 <            () -> { f.thenAcceptBothAsync(g, null, exec); },
2441 <            () -> { f.thenAcceptBoth(nullFuture, (x, y) -> {}); },
2442 <            () -> { f.thenAcceptBothAsync(nullFuture, (x, y) -> {}); },
2443 <            () -> { f.thenAcceptBothAsync(nullFuture, (x, y) -> {}, exec); },
2444 <            () -> { f.thenAcceptBothAsync(g, (x, y) -> {}, null); },
2445 <
2446 <            () -> { f.runAfterBoth(g, null); },
2447 <            () -> { f.runAfterBothAsync(g, null); },
2448 <            () -> { f.runAfterBothAsync(g, null, exec); },
2449 <            () -> { f.runAfterBoth(nullFuture, () -> {}); },
2450 <            () -> { f.runAfterBothAsync(nullFuture, () -> {}); },
2451 <            () -> { f.runAfterBothAsync(nullFuture, () -> {}, exec); },
2452 <            () -> { f.runAfterBothAsync(g, () -> {}, null); },
2453 <
2454 <            () -> { f.applyToEither(g, null); },
2455 <            () -> { f.applyToEitherAsync(g, null); },
2456 <            () -> { f.applyToEitherAsync(g, null, exec); },
2457 <            () -> { f.applyToEither(nullFuture, (x) -> x); },
2458 <            () -> { f.applyToEitherAsync(nullFuture, (x) -> x); },
2459 <            () -> { f.applyToEitherAsync(nullFuture, (x) -> x, exec); },
2460 <            () -> { f.applyToEitherAsync(g, (x) -> x, null); },
2461 <
2462 <            () -> { f.acceptEither(g, null); },
2463 <            () -> { f.acceptEitherAsync(g, null); },
2464 <            () -> { f.acceptEitherAsync(g, null, exec); },
2465 <            () -> { f.acceptEither(nullFuture, (x) -> {}); },
2466 <            () -> { f.acceptEitherAsync(nullFuture, (x) -> {}); },
2467 <            () -> { f.acceptEitherAsync(nullFuture, (x) -> {}, exec); },
2468 <            () -> { f.acceptEitherAsync(g, (x) -> {}, null); },
2469 <
2470 <            () -> { f.runAfterEither(g, null); },
2471 <            () -> { f.runAfterEitherAsync(g, null); },
2472 <            () -> { f.runAfterEitherAsync(g, null, exec); },
2473 <            () -> { f.runAfterEither(nullFuture, () -> {}); },
2474 <            () -> { f.runAfterEitherAsync(nullFuture, () -> {}); },
2475 <            () -> { f.runAfterEitherAsync(nullFuture, () -> {}, exec); },
2476 <            () -> { f.runAfterEitherAsync(g, () -> {}, null); },
2477 <
2478 <            () -> { f.thenCompose(null); },
2479 <            () -> { f.thenComposeAsync(null); },
2480 <            () -> { f.thenComposeAsync(new CompletableFutureInc(), null); },
2481 <            () -> { f.thenComposeAsync(null, exec); },
2482 <
2483 <            () -> { f.exceptionally(null); },
2484 <
2485 <            () -> { f.handle(null); },
2486 <
2487 <            () -> { CompletableFuture.allOf((CompletableFuture<?>)null); },
2488 <            () -> { CompletableFuture.allOf((CompletableFuture<?>[])null); },
2489 <            () -> { CompletableFuture.allOf(f, null); },
2490 <            () -> { CompletableFuture.allOf(null, f); },
2491 <
2492 <            () -> { CompletableFuture.anyOf((CompletableFuture<?>)null); },
2493 <            () -> { CompletableFuture.anyOf((CompletableFuture<?>[])null); },
2494 <            () -> { CompletableFuture.anyOf(f, null); },
2495 <            () -> { CompletableFuture.anyOf(null, f); },
2496 <
2497 <            // TODO: Crashes javac with lambda-8-2013-03-31...
2498 <            //() -> { CompletableFuture<?> x = f.thenAccept(null); },
2499 <            //() -> { CompletableFuture<Void> x = f.thenRun(null); },
2500 <            //() -> { CompletableFuture<Integer> x = f.thenApply(() -> { ; }); },
2501 <        };
2502 <
2503 <        assertThrows(NullPointerException.class, throwingActions);
2504 <    }
4149 > //     static <U> U join(CompletionStage<U> stage) {
4150 > //         CompletableFuture<U> f = new CompletableFuture<>();
4151 > //         stage.whenComplete((v, ex) -> {
4152 > //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4153 > //         });
4154 > //         return f.join();
4155 > //     }
4156 >
4157 > //     static <U> boolean isDone(CompletionStage<U> stage) {
4158 > //         CompletableFuture<U> f = new CompletableFuture<>();
4159 > //         stage.whenComplete((v, ex) -> {
4160 > //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4161 > //         });
4162 > //         return f.isDone();
4163 > //     }
4164 >
4165 > //     static <U> U join2(CompletionStage<U> stage) {
4166 > //         return stage.toCompletableFuture().copy().join();
4167 > //     }
4168 >
4169 > //     static <U> boolean isDone2(CompletionStage<U> stage) {
4170 > //         return stage.toCompletableFuture().copy().isDone();
4171 > //     }
4172  
4173   }

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