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Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.40 by jsr166, Mon Jun 2 01:11:53 2014 UTC vs.
Revision 1.146 by jsr166, Mon Apr 11 06:31:42 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.TimeoutException;
34 + import java.util.concurrent.TimeUnit;
35   import java.util.concurrent.atomic.AtomicInteger;
36 < import static java.util.concurrent.TimeUnit.MILLISECONDS;
23 < import static java.util.concurrent.TimeUnit.SECONDS;
24 < import java.util.*;
25 < import java.util.function.Supplier;
26 < import java.util.function.Consumer;
36 > import java.util.concurrent.atomic.AtomicReference;
37   import java.util.function.BiConsumer;
28 import java.util.function.Function;
38   import java.util.function.BiFunction;
39 + import java.util.function.Consumer;
40 + import java.util.function.Function;
41 + import java.util.function.Predicate;
42 + import java.util.function.Supplier;
43 +
44 + import junit.framework.AssertionFailedError;
45 + import junit.framework.Test;
46 + import junit.framework.TestSuite;
47  
48   public class CompletableFutureTest extends JSR166TestCase {
49  
50      public static void main(String[] args) {
51 <        junit.textui.TestRunner.run(suite());
51 >        main(suite(), args);
52      }
53      public static Test suite() {
54          return new TestSuite(CompletableFutureTest.class);
# Line 42 | Line 59 | public class CompletableFutureTest exten
59      void checkIncomplete(CompletableFuture<?> f) {
60          assertFalse(f.isDone());
61          assertFalse(f.isCancelled());
62 <        assertTrue(f.toString().contains("[Not completed]"));
62 >        assertTrue(f.toString().contains("Not completed"));
63          try {
64              assertNull(f.getNow(null));
65          } catch (Throwable fail) { threadUnexpectedException(fail); }
# Line 55 | Line 72 | public class CompletableFutureTest exten
72      }
73  
74      <T> void checkCompletedNormally(CompletableFuture<T> f, T value) {
75 <        try {
76 <            assertEquals(value, f.get(LONG_DELAY_MS, MILLISECONDS));
60 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
75 >        checkTimedGet(f, value);
76 >
77          try {
78              assertEquals(value, f.join());
79          } catch (Throwable fail) { threadUnexpectedException(fail); }
# Line 73 | Line 89 | public class CompletableFutureTest exten
89          assertTrue(f.toString().contains("[Completed normally]"));
90      }
91  
92 <    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
93 <        try {
94 <            f.get(LONG_DELAY_MS, MILLISECONDS);
95 <            shouldThrow();
96 <        } catch (ExecutionException success) {
97 <            assertTrue(success.getCause() instanceof CFException);
98 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
99 <        try {
100 <            f.join();
101 <            shouldThrow();
102 <        } catch (CompletionException success) {
103 <            assertTrue(success.getCause() instanceof CFException);
104 <        }
105 <        try {
106 <            f.getNow(null);
107 <            shouldThrow();
108 <        } catch (CompletionException success) {
93 <            assertTrue(success.getCause() instanceof CFException);
92 >    /**
93 >     * Returns the "raw" internal exceptional completion of f,
94 >     * without any additional wrapping with CompletionException.
95 >     */
96 >    <U> Throwable exceptionalCompletion(CompletableFuture<U> f) {
97 >        // handle (and whenComplete) can distinguish between "direct"
98 >        // and "wrapped" exceptional completion
99 >        return f.handle((U u, Throwable t) -> t).join();
100 >    }
101 >
102 >    void checkCompletedExceptionally(CompletableFuture<?> f,
103 >                                     boolean wrapped,
104 >                                     Consumer<Throwable> checker) {
105 >        Throwable cause = exceptionalCompletion(f);
106 >        if (wrapped) {
107 >            assertTrue(cause instanceof CompletionException);
108 >            cause = cause.getCause();
109          }
110 <        try {
96 <            f.get();
97 <            shouldThrow();
98 <        } catch (ExecutionException success) {
99 <            assertTrue(success.getCause() instanceof CFException);
100 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
101 <        assertTrue(f.isDone());
102 <        assertFalse(f.isCancelled());
103 <        assertTrue(f.toString().contains("[Completed exceptionally]"));
104 <    }
110 >        checker.accept(cause);
111  
112 <    void checkCompletedWithWrappedCFException(CompletableFuture<?> f,
107 <                                              CFException ex) {
112 >        long startTime = System.nanoTime();
113          try {
114              f.get(LONG_DELAY_MS, MILLISECONDS);
115              shouldThrow();
116          } catch (ExecutionException success) {
117 <            assertSame(ex, success.getCause());
117 >            assertSame(cause, success.getCause());
118          } catch (Throwable fail) { threadUnexpectedException(fail); }
119 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
120 +
121          try {
122              f.join();
123              shouldThrow();
124          } catch (CompletionException success) {
125 <            assertSame(ex, success.getCause());
126 <        }
125 >            assertSame(cause, success.getCause());
126 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
127 >
128          try {
129              f.getNow(null);
130              shouldThrow();
131          } catch (CompletionException success) {
132 <            assertSame(ex, success.getCause());
133 <        }
132 >            assertSame(cause, success.getCause());
133 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
134 >
135          try {
136              f.get();
137              shouldThrow();
138          } catch (ExecutionException success) {
139 <            assertSame(ex, success.getCause());
139 >            assertSame(cause, success.getCause());
140          } catch (Throwable fail) { threadUnexpectedException(fail); }
141 <        assertTrue(f.isDone());
141 >
142          assertFalse(f.isCancelled());
143 +        assertTrue(f.isDone());
144 +        assertTrue(f.isCompletedExceptionally());
145          assertTrue(f.toString().contains("[Completed exceptionally]"));
146      }
147  
148 +    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
149 +        checkCompletedExceptionally(f, true,
150 +            (t) -> assertTrue(t instanceof CFException));
151 +    }
152 +
153 +    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
154 +        checkCompletedExceptionally(f, true,
155 +            (t) -> assertTrue(t instanceof CancellationException));
156 +    }
157 +
158 +    void checkCompletedWithTimeoutException(CompletableFuture<?> f) {
159 +        checkCompletedExceptionally(f, false,
160 +            (t) -> assertTrue(t instanceof TimeoutException));
161 +    }
162 +
163 +    void checkCompletedWithWrappedException(CompletableFuture<?> f,
164 +                                            Throwable ex) {
165 +        checkCompletedExceptionally(f, true, (t) -> assertSame(t, ex));
166 +    }
167 +
168 +    void checkCompletedExceptionally(CompletableFuture<?> f, Throwable ex) {
169 +        checkCompletedExceptionally(f, false, (t) -> assertSame(t, ex));
170 +    }
171 +
172      void checkCancelled(CompletableFuture<?> f) {
173 +        long startTime = System.nanoTime();
174          try {
175              f.get(LONG_DELAY_MS, MILLISECONDS);
176              shouldThrow();
177          } catch (CancellationException success) {
178          } catch (Throwable fail) { threadUnexpectedException(fail); }
179 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
180 +
181          try {
182              f.join();
183              shouldThrow();
# Line 153 | Line 191 | public class CompletableFutureTest exten
191              shouldThrow();
192          } catch (CancellationException success) {
193          } catch (Throwable fail) { threadUnexpectedException(fail); }
156        assertTrue(f.isDone());
157        assertTrue(f.isCompletedExceptionally());
158        assertTrue(f.isCancelled());
159        assertTrue(f.toString().contains("[Completed exceptionally]"));
160    }
194  
195 <    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
196 <        try {
164 <            f.get(LONG_DELAY_MS, MILLISECONDS);
165 <            shouldThrow();
166 <        } catch (ExecutionException success) {
167 <            assertTrue(success.getCause() instanceof CancellationException);
168 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
169 <        try {
170 <            f.join();
171 <            shouldThrow();
172 <        } catch (CompletionException success) {
173 <            assertTrue(success.getCause() instanceof CancellationException);
174 <        }
175 <        try {
176 <            f.getNow(null);
177 <            shouldThrow();
178 <        } catch (CompletionException success) {
179 <            assertTrue(success.getCause() instanceof CancellationException);
180 <        }
181 <        try {
182 <            f.get();
183 <            shouldThrow();
184 <        } catch (ExecutionException success) {
185 <            assertTrue(success.getCause() instanceof CancellationException);
186 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
195 >        assertTrue(exceptionalCompletion(f) instanceof CancellationException);
196 >
197          assertTrue(f.isDone());
188        assertFalse(f.isCancelled());
198          assertTrue(f.isCompletedExceptionally());
199 +        assertTrue(f.isCancelled());
200          assertTrue(f.toString().contains("[Completed exceptionally]"));
201      }
202  
# Line 204 | Line 214 | public class CompletableFutureTest exten
214       * isCancelled, join, get, and getNow
215       */
216      public void testComplete() {
217 +        for (Integer v1 : new Integer[] { 1, null })
218 +    {
219          CompletableFuture<Integer> f = new CompletableFuture<>();
220          checkIncomplete(f);
221 <        f.complete(one);
222 <        checkCompletedNormally(f, one);
223 <    }
221 >        assertTrue(f.complete(v1));
222 >        assertFalse(f.complete(v1));
223 >        checkCompletedNormally(f, v1);
224 >    }}
225  
226      /**
227       * completeExceptionally completes exceptionally, as indicated by
# Line 216 | Line 229 | public class CompletableFutureTest exten
229       */
230      public void testCompleteExceptionally() {
231          CompletableFuture<Integer> f = new CompletableFuture<>();
232 +        CFException ex = new CFException();
233          checkIncomplete(f);
234 <        f.completeExceptionally(new CFException());
235 <        checkCompletedWithWrappedCFException(f);
234 >        f.completeExceptionally(ex);
235 >        checkCompletedExceptionally(f, ex);
236      }
237  
238      /**
# Line 226 | Line 240 | public class CompletableFutureTest exten
240       * methods isDone, isCancelled, join, get, and getNow
241       */
242      public void testCancel() {
243 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
244 +    {
245          CompletableFuture<Integer> f = new CompletableFuture<>();
246          checkIncomplete(f);
247 <        assertTrue(f.cancel(true));
247 >        assertTrue(f.cancel(mayInterruptIfRunning));
248 >        assertTrue(f.cancel(mayInterruptIfRunning));
249 >        assertTrue(f.cancel(!mayInterruptIfRunning));
250          checkCancelled(f);
251 <    }
251 >    }}
252  
253      /**
254       * obtrudeValue forces completion with given value
# Line 238 | Line 256 | public class CompletableFutureTest exten
256      public void testObtrudeValue() {
257          CompletableFuture<Integer> f = new CompletableFuture<>();
258          checkIncomplete(f);
259 <        f.complete(one);
259 >        assertTrue(f.complete(one));
260          checkCompletedNormally(f, one);
261          f.obtrudeValue(three);
262          checkCompletedNormally(f, three);
# Line 247 | Line 265 | public class CompletableFutureTest exten
265          f = new CompletableFuture<>();
266          f.obtrudeValue(three);
267          checkCompletedNormally(f, three);
268 +        f.obtrudeValue(null);
269 +        checkCompletedNormally(f, null);
270          f = new CompletableFuture<>();
271          f.completeExceptionally(new CFException());
272          f.obtrudeValue(four);
# Line 257 | Line 277 | public class CompletableFutureTest exten
277       * obtrudeException forces completion with given exception
278       */
279      public void testObtrudeException() {
280 <        CompletableFuture<Integer> f = new CompletableFuture<>();
281 <        checkIncomplete(f);
282 <        f.complete(one);
283 <        checkCompletedNormally(f, one);
284 <        f.obtrudeException(new CFException());
265 <        checkCompletedWithWrappedCFException(f);
280 >        for (Integer v1 : new Integer[] { 1, null })
281 >    {
282 >        CFException ex;
283 >        CompletableFuture<Integer> f;
284 >
285          f = new CompletableFuture<>();
286 <        f.obtrudeException(new CFException());
287 <        checkCompletedWithWrappedCFException(f);
286 >        assertTrue(f.complete(v1));
287 >        for (int i = 0; i < 2; i++) {
288 >            f.obtrudeException(ex = new CFException());
289 >            checkCompletedExceptionally(f, ex);
290 >        }
291 >
292 >        f = new CompletableFuture<>();
293 >        for (int i = 0; i < 2; i++) {
294 >            f.obtrudeException(ex = new CFException());
295 >            checkCompletedExceptionally(f, ex);
296 >        }
297 >
298          f = new CompletableFuture<>();
299 +        f.completeExceptionally(ex = new CFException());
300 +        f.obtrudeValue(v1);
301 +        checkCompletedNormally(f, v1);
302 +        f.obtrudeException(ex = new CFException());
303 +        checkCompletedExceptionally(f, ex);
304          f.completeExceptionally(new CFException());
305 <        f.obtrudeValue(four);
306 <        checkCompletedNormally(f, four);
307 <        f.obtrudeException(new CFException());
308 <        checkCompletedWithWrappedCFException(f);
275 <    }
305 >        checkCompletedExceptionally(f, ex);
306 >        assertFalse(f.complete(v1));
307 >        checkCompletedExceptionally(f, ex);
308 >    }}
309  
310      /**
311       * getNumberOfDependents returns number of dependent tasks
312       */
313      public void testGetNumberOfDependents() {
314 +        for (ExecutionMode m : ExecutionMode.values())
315 +        for (Integer v1 : new Integer[] { 1, null })
316 +    {
317          CompletableFuture<Integer> f = new CompletableFuture<>();
318 <        assertEquals(f.getNumberOfDependents(), 0);
319 <        CompletableFuture g = f.thenRun(new Noop());
320 <        assertEquals(f.getNumberOfDependents(), 1);
321 <        assertEquals(g.getNumberOfDependents(), 0);
322 <        CompletableFuture h = f.thenRun(new Noop());
323 <        assertEquals(f.getNumberOfDependents(), 2);
324 <        f.complete(1);
318 >        assertEquals(0, f.getNumberOfDependents());
319 >        final CompletableFuture<Void> g = m.thenRun(f, new Noop(m));
320 >        assertEquals(1, f.getNumberOfDependents());
321 >        assertEquals(0, g.getNumberOfDependents());
322 >        final CompletableFuture<Void> h = m.thenRun(f, new Noop(m));
323 >        assertEquals(2, f.getNumberOfDependents());
324 >        assertEquals(0, h.getNumberOfDependents());
325 >        assertTrue(f.complete(v1));
326          checkCompletedNormally(g, null);
327 <        assertEquals(f.getNumberOfDependents(), 0);
328 <        assertEquals(g.getNumberOfDependents(), 0);
329 <    }
327 >        checkCompletedNormally(h, null);
328 >        assertEquals(0, f.getNumberOfDependents());
329 >        assertEquals(0, g.getNumberOfDependents());
330 >        assertEquals(0, h.getNumberOfDependents());
331 >    }}
332  
333      /**
334       * toString indicates current completion state
# Line 300 | Line 339 | public class CompletableFutureTest exten
339          f = new CompletableFuture<String>();
340          assertTrue(f.toString().contains("[Not completed]"));
341  
342 <        f.complete("foo");
342 >        assertTrue(f.complete("foo"));
343          assertTrue(f.toString().contains("[Completed normally]"));
344  
345          f = new CompletableFuture<String>();
346 <        f.completeExceptionally(new IndexOutOfBoundsException());
346 >        assertTrue(f.completeExceptionally(new IndexOutOfBoundsException()));
347          assertTrue(f.toString().contains("[Completed exceptionally]"));
348 +
349 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
350 +            f = new CompletableFuture<String>();
351 +            assertTrue(f.cancel(mayInterruptIfRunning));
352 +            assertTrue(f.toString().contains("[Completed exceptionally]"));
353 +        }
354      }
355  
356      /**
# Line 316 | Line 361 | public class CompletableFutureTest exten
361          checkCompletedNormally(f, "test");
362      }
363  
364 <    // Choose non-commutative actions for better coverage
364 >    abstract class CheckedAction {
365 >        int invocationCount = 0;
366 >        final ExecutionMode m;
367 >        CheckedAction(ExecutionMode m) { this.m = m; }
368 >        void invoked() {
369 >            m.checkExecutionMode();
370 >            assertEquals(0, invocationCount++);
371 >        }
372 >        void assertNotInvoked() { assertEquals(0, invocationCount); }
373 >        void assertInvoked() { assertEquals(1, invocationCount); }
374 >    }
375  
376 <    // A non-commutative function that handles and produces null values as well.
377 <    static Integer subtract(Integer x, Integer y) {
378 <        return (x == null && y == null) ? null :
379 <            ((x == null) ? 42 : x.intValue())
380 <            - ((y == null) ? 99 : y.intValue());
376 >    abstract class CheckedIntegerAction extends CheckedAction {
377 >        Integer value;
378 >        CheckedIntegerAction(ExecutionMode m) { super(m); }
379 >        void assertValue(Integer expected) {
380 >            assertInvoked();
381 >            assertEquals(expected, value);
382 >        }
383 >    }
384 >
385 >    class IntegerSupplier extends CheckedAction
386 >        implements Supplier<Integer>
387 >    {
388 >        final Integer value;
389 >        IntegerSupplier(ExecutionMode m, Integer value) {
390 >            super(m);
391 >            this.value = value;
392 >        }
393 >        public Integer get() {
394 >            invoked();
395 >            return value;
396 >        }
397      }
398  
399      // A function that handles and produces null values as well.
# Line 330 | Line 401 | public class CompletableFutureTest exten
401          return (x == null) ? null : x + 1;
402      }
403  
404 <    static final Supplier<Integer> supplyOne =
405 <        () -> Integer.valueOf(1);
406 <    static final Function<Integer, Integer> inc =
407 <        (Integer x) -> Integer.valueOf(x.intValue() + 1);
337 <    static final BiFunction<Integer, Integer, Integer> subtract =
338 <        (Integer x, Integer y) -> subtract(x, y);
339 <    static final class IncAction implements Consumer<Integer> {
340 <        int invocationCount = 0;
341 <        Integer value;
342 <        public boolean ran() { return invocationCount == 1; }
404 >    class NoopConsumer extends CheckedIntegerAction
405 >        implements Consumer<Integer>
406 >    {
407 >        NoopConsumer(ExecutionMode m) { super(m); }
408          public void accept(Integer x) {
409 <            invocationCount++;
410 <            value = inc(x);
409 >            invoked();
410 >            value = x;
411          }
412      }
413 <    static final class IncFunction implements Function<Integer,Integer> {
414 <        int invocationCount = 0;
415 <        Integer value;
416 <        public boolean ran() { return invocationCount == 1; }
413 >
414 >    class IncFunction extends CheckedIntegerAction
415 >        implements Function<Integer,Integer>
416 >    {
417 >        IncFunction(ExecutionMode m) { super(m); }
418          public Integer apply(Integer x) {
419 <            invocationCount++;
419 >            invoked();
420              return value = inc(x);
421          }
422      }
423 <    static final class SubtractAction implements BiConsumer<Integer, Integer> {
424 <        int invocationCount = 0;
425 <        Integer value;
426 <        // Check this action was invoked exactly once when result is computed.
427 <        public boolean ran() { return invocationCount == 1; }
423 >
424 >    // Choose non-commutative actions for better coverage
425 >    // A non-commutative function that handles and produces null values as well.
426 >    static Integer subtract(Integer x, Integer y) {
427 >        return (x == null && y == null) ? null :
428 >            ((x == null) ? 42 : x.intValue())
429 >            - ((y == null) ? 99 : y.intValue());
430 >    }
431 >
432 >    class SubtractAction extends CheckedIntegerAction
433 >        implements BiConsumer<Integer, Integer>
434 >    {
435 >        SubtractAction(ExecutionMode m) { super(m); }
436          public void accept(Integer x, Integer y) {
437 <            invocationCount++;
437 >            invoked();
438              value = subtract(x, y);
439          }
440      }
441 <    static final class SubtractFunction implements BiFunction<Integer, Integer, Integer> {
442 <        int invocationCount = 0;
443 <        Integer value;
444 <        // Check this action was invoked exactly once when result is computed.
445 <        public boolean ran() { return invocationCount == 1; }
441 >
442 >    class SubtractFunction extends CheckedIntegerAction
443 >        implements BiFunction<Integer, Integer, Integer>
444 >    {
445 >        SubtractFunction(ExecutionMode m) { super(m); }
446          public Integer apply(Integer x, Integer y) {
447 <            invocationCount++;
447 >            invoked();
448              return value = subtract(x, y);
449          }
450      }
451 <    static final class Noop implements Runnable {
452 <        boolean ran;
453 <        public void run() { ran = true; }
451 >
452 >    class Noop extends CheckedAction implements Runnable {
453 >        Noop(ExecutionMode m) { super(m); }
454 >        public void run() {
455 >            invoked();
456 >        }
457      }
458  
459 <    static final class FailingSupplier implements Supplier<Integer> {
460 <        boolean ran;
461 <        public Integer get() { ran = true; throw new CFException(); }
459 >    class FailingSupplier extends CheckedAction
460 >        implements Supplier<Integer>
461 >    {
462 >        FailingSupplier(ExecutionMode m) { super(m); }
463 >        public Integer get() {
464 >            invoked();
465 >            throw new CFException();
466 >        }
467      }
468 <    static final class FailingConsumer implements Consumer<Integer> {
469 <        boolean ran;
470 <        public void accept(Integer x) { ran = true; throw new CFException(); }
468 >
469 >    class FailingConsumer extends CheckedIntegerAction
470 >        implements Consumer<Integer>
471 >    {
472 >        FailingConsumer(ExecutionMode m) { super(m); }
473 >        public void accept(Integer x) {
474 >            invoked();
475 >            value = x;
476 >            throw new CFException();
477 >        }
478      }
479 <    static final class FailingBiConsumer implements BiConsumer<Integer, Integer> {
480 <        boolean ran;
481 <        public void accept(Integer x, Integer y) { ran = true; throw new CFException(); }
479 >
480 >    class FailingBiConsumer extends CheckedIntegerAction
481 >        implements BiConsumer<Integer, Integer>
482 >    {
483 >        FailingBiConsumer(ExecutionMode m) { super(m); }
484 >        public void accept(Integer x, Integer y) {
485 >            invoked();
486 >            value = subtract(x, y);
487 >            throw new CFException();
488 >        }
489      }
490 <    static final class FailingFunction implements Function<Integer, Integer> {
491 <        boolean ran;
492 <        public Integer apply(Integer x) { ran = true; throw new CFException(); }
490 >
491 >    class FailingFunction extends CheckedIntegerAction
492 >        implements Function<Integer, Integer>
493 >    {
494 >        FailingFunction(ExecutionMode m) { super(m); }
495 >        public Integer apply(Integer x) {
496 >            invoked();
497 >            value = x;
498 >            throw new CFException();
499 >        }
500      }
501 <    static final class FailingBiFunction implements BiFunction<Integer, Integer, Integer> {
502 <        boolean ran;
503 <        public Integer apply(Integer x, Integer y) { ran = true; throw new CFException(); }
501 >
502 >    class FailingBiFunction extends CheckedIntegerAction
503 >        implements BiFunction<Integer, Integer, Integer>
504 >    {
505 >        FailingBiFunction(ExecutionMode m) { super(m); }
506 >        public Integer apply(Integer x, Integer y) {
507 >            invoked();
508 >            value = subtract(x, y);
509 >            throw new CFException();
510 >        }
511      }
512 <    static final class FailingNoop implements Runnable {
513 <        boolean ran;
514 <        public void run() { ran = true; throw new CFException(); }
512 >
513 >    class FailingRunnable extends CheckedAction implements Runnable {
514 >        FailingRunnable(ExecutionMode m) { super(m); }
515 >        public void run() {
516 >            invoked();
517 >            throw new CFException();
518 >        }
519      }
520  
521 <    static final class CompletableFutureInc
522 <        implements Function<Integer, CompletableFuture<Integer>> {
523 <        boolean ran;
521 >    class CompletableFutureInc extends CheckedIntegerAction
522 >        implements Function<Integer, CompletableFuture<Integer>>
523 >    {
524 >        CompletableFutureInc(ExecutionMode m) { super(m); }
525          public CompletableFuture<Integer> apply(Integer x) {
526 <            ran = true;
526 >            invoked();
527 >            value = x;
528              CompletableFuture<Integer> f = new CompletableFuture<>();
529 <            f.complete(Integer.valueOf(x.intValue() + 1));
529 >            assertTrue(f.complete(inc(x)));
530              return f;
531          }
532      }
533  
534 <    static final class FailingCompletableFutureFunction
535 <        implements Function<Integer, CompletableFuture<Integer>> {
536 <        boolean ran;
534 >    class FailingCompletableFutureFunction extends CheckedIntegerAction
535 >        implements Function<Integer, CompletableFuture<Integer>>
536 >    {
537 >        FailingCompletableFutureFunction(ExecutionMode m) { super(m); }
538          public CompletableFuture<Integer> apply(Integer x) {
539 <            ran = true; throw new CFException();
539 >            invoked();
540 >            value = x;
541 >            throw new CFException();
542          }
543      }
544  
545      // Used for explicit executor tests
546      static final class ThreadExecutor implements Executor {
547 <        AtomicInteger count = new AtomicInteger(0);
547 >        final AtomicInteger count = new AtomicInteger(0);
548 >        static final ThreadGroup tg = new ThreadGroup("ThreadExecutor");
549 >        static boolean startedCurrentThread() {
550 >            return Thread.currentThread().getThreadGroup() == tg;
551 >        }
552  
553          public void execute(Runnable r) {
554              count.getAndIncrement();
555 <            new Thread(r).start();
555 >            new Thread(tg, r).start();
556          }
557      }
558  
559 <    static final class ExceptionToInteger implements Function<Throwable, Integer> {
560 <        public Integer apply(Throwable x) { return Integer.valueOf(3); }
438 <    }
439 <
440 <    static final class IntegerHandler implements BiFunction<Integer, Throwable, Integer> {
441 <        boolean ran;
442 <        public Integer apply(Integer x, Throwable t) {
443 <            ran = true;
444 <            return (t == null) ? two : three;
445 <        }
446 <    }
559 >    static final boolean defaultExecutorIsCommonPool
560 >        = ForkJoinPool.getCommonPoolParallelism() > 1;
561  
562      /**
563       * Permits the testing of parallel code for the 3 different
564 <     * execution modes without repeating all the testing code.
564 >     * execution modes without copy/pasting all the test methods.
565       */
566      enum ExecutionMode {
567 <        DEFAULT {
567 >        SYNC {
568 >            public void checkExecutionMode() {
569 >                assertFalse(ThreadExecutor.startedCurrentThread());
570 >                assertNull(ForkJoinTask.getPool());
571 >            }
572 >            public CompletableFuture<Void> runAsync(Runnable a) {
573 >                throw new UnsupportedOperationException();
574 >            }
575 >            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
576 >                throw new UnsupportedOperationException();
577 >            }
578 >            public <T> CompletableFuture<Void> thenRun
579 >                (CompletableFuture<T> f, Runnable a) {
580 >                return f.thenRun(a);
581 >            }
582 >            public <T> CompletableFuture<Void> thenAccept
583 >                (CompletableFuture<T> f, Consumer<? super T> a) {
584 >                return f.thenAccept(a);
585 >            }
586 >            public <T,U> CompletableFuture<U> thenApply
587 >                (CompletableFuture<T> f, Function<? super T,U> a) {
588 >                return f.thenApply(a);
589 >            }
590 >            public <T,U> CompletableFuture<U> thenCompose
591 >                (CompletableFuture<T> f,
592 >                 Function<? super T,? extends CompletionStage<U>> a) {
593 >                return f.thenCompose(a);
594 >            }
595 >            public <T,U> CompletableFuture<U> handle
596 >                (CompletableFuture<T> f,
597 >                 BiFunction<? super T,Throwable,? extends U> a) {
598 >                return f.handle(a);
599 >            }
600 >            public <T> CompletableFuture<T> whenComplete
601 >                (CompletableFuture<T> f,
602 >                 BiConsumer<? super T,? super Throwable> a) {
603 >                return f.whenComplete(a);
604 >            }
605              public <T,U> CompletableFuture<Void> runAfterBoth
606                  (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
607                  return f.runAfterBoth(g, a);
# Line 467 | Line 618 | public class CompletableFutureTest exten
618                   BiFunction<? super T,? super U,? extends V> a) {
619                  return f.thenCombine(g, a);
620              }
621 <            public <T,U> CompletableFuture<U> applyToEither
621 >            public <T> CompletableFuture<Void> runAfterEither
622                  (CompletableFuture<T> f,
623 <                 CompletionStage<? extends T> g,
624 <                 Function<? super T,U> a) {
625 <                return f.applyToEither(g, a);
623 >                 CompletionStage<?> g,
624 >                 java.lang.Runnable a) {
625 >                return f.runAfterEither(g, a);
626              }
627              public <T> CompletableFuture<Void> acceptEither
628                  (CompletableFuture<T> f,
# Line 479 | Line 630 | public class CompletableFutureTest exten
630                   Consumer<? super T> a) {
631                  return f.acceptEither(g, a);
632              }
633 <            public <T> CompletableFuture<Void> runAfterEither
633 >            public <T,U> CompletableFuture<U> applyToEither
634                  (CompletableFuture<T> f,
635 <                 CompletionStage<?> g,
636 <                 java.lang.Runnable a) {
637 <                return f.runAfterEither(g, a);
635 >                 CompletionStage<? extends T> g,
636 >                 Function<? super T,U> a) {
637 >                return f.applyToEither(g, a);
638 >            }
639 >        },
640 >
641 >        ASYNC {
642 >            public void checkExecutionMode() {
643 >                assertEquals(defaultExecutorIsCommonPool,
644 >                             (ForkJoinPool.commonPool() == ForkJoinTask.getPool()));
645 >            }
646 >            public CompletableFuture<Void> runAsync(Runnable a) {
647 >                return CompletableFuture.runAsync(a);
648 >            }
649 >            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
650 >                return CompletableFuture.supplyAsync(a);
651 >            }
652 >            public <T> CompletableFuture<Void> thenRun
653 >                (CompletableFuture<T> f, Runnable a) {
654 >                return f.thenRunAsync(a);
655 >            }
656 >            public <T> CompletableFuture<Void> thenAccept
657 >                (CompletableFuture<T> f, Consumer<? super T> a) {
658 >                return f.thenAcceptAsync(a);
659 >            }
660 >            public <T,U> CompletableFuture<U> thenApply
661 >                (CompletableFuture<T> f, Function<? super T,U> a) {
662 >                return f.thenApplyAsync(a);
663              }
664              public <T,U> CompletableFuture<U> thenCompose
665                  (CompletableFuture<T> f,
666                   Function<? super T,? extends CompletionStage<U>> a) {
667 <                return f.thenCompose(a);
667 >                return f.thenComposeAsync(a);
668 >            }
669 >            public <T,U> CompletableFuture<U> handle
670 >                (CompletableFuture<T> f,
671 >                 BiFunction<? super T,Throwable,? extends U> a) {
672 >                return f.handleAsync(a);
673              }
674              public <T> CompletableFuture<T> whenComplete
675                  (CompletableFuture<T> f,
676                   BiConsumer<? super T,? super Throwable> a) {
677 <                return f.whenComplete(a);
677 >                return f.whenCompleteAsync(a);
678              }
498        },
499
500 //             /** Experimental way to do more testing */
501 //         REVERSE_DEFAULT {
502 //             public <T,U> CompletableFuture<Void> runAfterBoth
503 //                 (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
504 //                 return g.runAfterBoth(f, a);
505 //             }
506 //             public <T,U> CompletableFuture<Void> thenAcceptBoth
507 //                 (CompletableFuture<T> f,
508 //                  CompletionStage<? extends U> g,
509 //                  BiConsumer<? super T,? super U> a) {
510 //                 return DEFAULT.thenAcceptBoth(f, g, a);
511 //             }
512 //         },
513
514        DEFAULT_ASYNC {
679              public <T,U> CompletableFuture<Void> runAfterBoth
680                  (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
681                  return f.runAfterBothAsync(g, a);
# Line 528 | Line 692 | public class CompletableFutureTest exten
692                   BiFunction<? super T,? super U,? extends V> a) {
693                  return f.thenCombineAsync(g, a);
694              }
695 <            public <T,U> CompletableFuture<U> applyToEither
695 >            public <T> CompletableFuture<Void> runAfterEither
696                  (CompletableFuture<T> f,
697 <                 CompletionStage<? extends T> g,
698 <                 Function<? super T,U> a) {
699 <                return f.applyToEitherAsync(g, a);
697 >                 CompletionStage<?> g,
698 >                 java.lang.Runnable a) {
699 >                return f.runAfterEitherAsync(g, a);
700              }
701              public <T> CompletableFuture<Void> acceptEither
702                  (CompletableFuture<T> f,
# Line 540 | Line 704 | public class CompletableFutureTest exten
704                   Consumer<? super T> a) {
705                  return f.acceptEitherAsync(g, a);
706              }
707 <            public <T> CompletableFuture<Void> runAfterEither
707 >            public <T,U> CompletableFuture<U> applyToEither
708                  (CompletableFuture<T> f,
709 <                 CompletionStage<?> g,
710 <                 java.lang.Runnable a) {
711 <                return f.runAfterEitherAsync(g, a);
709 >                 CompletionStage<? extends T> g,
710 >                 Function<? super T,U> a) {
711 >                return f.applyToEitherAsync(g, a);
712 >            }
713 >        },
714 >
715 >        EXECUTOR {
716 >            public void checkExecutionMode() {
717 >                assertTrue(ThreadExecutor.startedCurrentThread());
718 >            }
719 >            public CompletableFuture<Void> runAsync(Runnable a) {
720 >                return CompletableFuture.runAsync(a, new ThreadExecutor());
721 >            }
722 >            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
723 >                return CompletableFuture.supplyAsync(a, new ThreadExecutor());
724 >            }
725 >            public <T> CompletableFuture<Void> thenRun
726 >                (CompletableFuture<T> f, Runnable a) {
727 >                return f.thenRunAsync(a, new ThreadExecutor());
728 >            }
729 >            public <T> CompletableFuture<Void> thenAccept
730 >                (CompletableFuture<T> f, Consumer<? super T> a) {
731 >                return f.thenAcceptAsync(a, new ThreadExecutor());
732 >            }
733 >            public <T,U> CompletableFuture<U> thenApply
734 >                (CompletableFuture<T> f, Function<? super T,U> a) {
735 >                return f.thenApplyAsync(a, new ThreadExecutor());
736              }
737              public <T,U> CompletableFuture<U> thenCompose
738                  (CompletableFuture<T> f,
739                   Function<? super T,? extends CompletionStage<U>> a) {
740 <                return f.thenComposeAsync(a);
740 >                return f.thenComposeAsync(a, new ThreadExecutor());
741 >            }
742 >            public <T,U> CompletableFuture<U> handle
743 >                (CompletableFuture<T> f,
744 >                 BiFunction<? super T,Throwable,? extends U> a) {
745 >                return f.handleAsync(a, new ThreadExecutor());
746              }
747              public <T> CompletableFuture<T> whenComplete
748                  (CompletableFuture<T> f,
749                   BiConsumer<? super T,? super Throwable> a) {
750 <                return f.whenCompleteAsync(a);
750 >                return f.whenCompleteAsync(a, new ThreadExecutor());
751              }
559        },
560
561 //         REVERSE_DEFAULT_ASYNC {
562 //             public <T,U> CompletableFuture<Void> runAfterBoth
563 //                 (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
564 //                 return f.runAfterBothAsync(g, a);
565 //             }
566 //             public <T,U> CompletableFuture<Void> thenAcceptBoth
567 //                 (CompletableFuture<T> f,
568 //                  CompletionStage<? extends U> g,
569 //                  BiConsumer<? super T,? super U> a) {
570 //                 return DEFAULT_ASYNC.thenAcceptBoth(f, g, a);
571 //             }
572 //         },
573
574        EXECUTOR {
752              public <T,U> CompletableFuture<Void> runAfterBoth
753                  (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
754                  return f.runAfterBothAsync(g, a, new ThreadExecutor());
# Line 588 | Line 765 | public class CompletableFutureTest exten
765                   BiFunction<? super T,? super U,? extends V> a) {
766                  return f.thenCombineAsync(g, a, new ThreadExecutor());
767              }
591            public <T,U> CompletableFuture<U> applyToEither
592                (CompletableFuture<T> f,
593                 CompletionStage<? extends T> g,
594                 Function<? super T,U> a) {
595                return f.applyToEitherAsync(g, a, new ThreadExecutor());
596            }
597            public <T> CompletableFuture<Void> acceptEither
598                (CompletableFuture<T> f,
599                 CompletionStage<? extends T> g,
600                 Consumer<? super T> a) {
601                return f.acceptEitherAsync(g, a, new ThreadExecutor());
602            }
768              public <T> CompletableFuture<Void> runAfterEither
769                  (CompletableFuture<T> f,
770                   CompletionStage<?> g,
771                   java.lang.Runnable a) {
772                  return f.runAfterEitherAsync(g, a, new ThreadExecutor());
773              }
774 <            public <T,U> CompletableFuture<U> thenCompose
774 >            public <T> CompletableFuture<Void> acceptEither
775                  (CompletableFuture<T> f,
776 <                 Function<? super T,? extends CompletionStage<U>> a) {
777 <                return f.thenComposeAsync(a, new ThreadExecutor());
776 >                 CompletionStage<? extends T> g,
777 >                 Consumer<? super T> a) {
778 >                return f.acceptEitherAsync(g, a, new ThreadExecutor());
779              }
780 <            public <T> CompletableFuture<T> whenComplete
780 >            public <T,U> CompletableFuture<U> applyToEither
781                  (CompletableFuture<T> f,
782 <                 BiConsumer<? super T,? super Throwable> a) {
783 <                return f.whenCompleteAsync(a, new ThreadExecutor());
782 >                 CompletionStage<? extends T> g,
783 >                 Function<? super T,U> a) {
784 >                return f.applyToEitherAsync(g, a, new ThreadExecutor());
785              }
786          };
787  
788 +        public abstract void checkExecutionMode();
789 +        public abstract CompletableFuture<Void> runAsync(Runnable a);
790 +        public abstract <U> CompletableFuture<U> supplyAsync(Supplier<U> a);
791 +        public abstract <T> CompletableFuture<Void> thenRun
792 +            (CompletableFuture<T> f, Runnable a);
793 +        public abstract <T> CompletableFuture<Void> thenAccept
794 +            (CompletableFuture<T> f, Consumer<? super T> a);
795 +        public abstract <T,U> CompletableFuture<U> thenApply
796 +            (CompletableFuture<T> f, Function<? super T,U> a);
797 +        public abstract <T,U> CompletableFuture<U> thenCompose
798 +            (CompletableFuture<T> f,
799 +             Function<? super T,? extends CompletionStage<U>> a);
800 +        public abstract <T,U> CompletableFuture<U> handle
801 +            (CompletableFuture<T> f,
802 +             BiFunction<? super T,Throwable,? extends U> a);
803 +        public abstract <T> CompletableFuture<T> whenComplete
804 +            (CompletableFuture<T> f,
805 +             BiConsumer<? super T,? super Throwable> a);
806          public abstract <T,U> CompletableFuture<Void> runAfterBoth
807              (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a);
808          public abstract <T,U> CompletableFuture<Void> thenAcceptBoth
# Line 628 | Line 813 | public class CompletableFutureTest exten
813              (CompletableFuture<T> f,
814               CompletionStage<? extends U> g,
815               BiFunction<? super T,? super U,? extends V> a);
631        public abstract <T,U> CompletableFuture<U> applyToEither
632            (CompletableFuture<T> f,
633             CompletionStage<? extends T> g,
634             Function<? super T,U> a);
635        public abstract <T> CompletableFuture<Void> acceptEither
636            (CompletableFuture<T> f,
637             CompletionStage<? extends T> g,
638             Consumer<? super T> a);
816          public abstract <T> CompletableFuture<Void> runAfterEither
817              (CompletableFuture<T> f,
818               CompletionStage<?> g,
819               java.lang.Runnable a);
820 <        public abstract <T,U> CompletableFuture<U> thenCompose
820 >        public abstract <T> CompletableFuture<Void> acceptEither
821              (CompletableFuture<T> f,
822 <             Function<? super T,? extends CompletionStage<U>> a);
823 <        public abstract <T> CompletableFuture<T> whenComplete
822 >             CompletionStage<? extends T> g,
823 >             Consumer<? super T> a);
824 >        public abstract <T,U> CompletableFuture<U> applyToEither
825              (CompletableFuture<T> f,
826 <             BiConsumer<? super T,? super Throwable> a);
827 <
650 <
826 >             CompletionStage<? extends T> g,
827 >             Function<? super T,U> a);
828      }
829  
830      /**
831 <     * exceptionally action completes with function value on source
832 <     * exception; otherwise with source value
831 >     * exceptionally action is not invoked when source completes
832 >     * normally, and source result is propagated
833       */
834 <    public void testExceptionally() {
835 <        CompletableFuture<Integer> f = new CompletableFuture<>();
836 <        ExceptionToInteger r = new ExceptionToInteger();
837 <        CompletableFuture<Integer> g = f.exceptionally(r);
838 <        f.completeExceptionally(new CFException());
839 <        checkCompletedNormally(g, three);
834 >    public void testExceptionally_normalCompletion() {
835 >        for (boolean createIncomplete : new boolean[] { true, false })
836 >        for (Integer v1 : new Integer[] { 1, null })
837 >    {
838 >        final AtomicInteger a = new AtomicInteger(0);
839 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
840 >        if (!createIncomplete) assertTrue(f.complete(v1));
841 >        final CompletableFuture<Integer> g = f.exceptionally
842 >            ((Throwable t) -> {
843 >                a.getAndIncrement();
844 >                threadFail("should not be called");
845 >                return null;            // unreached
846 >            });
847 >        if (createIncomplete) assertTrue(f.complete(v1));
848  
849 <        f = new CompletableFuture<>();
850 <        r = new ExceptionToInteger();
851 <        g = f.exceptionally(r);
852 <        f.complete(one);
668 <        checkCompletedNormally(g, one);
669 <    }
849 >        checkCompletedNormally(g, v1);
850 >        checkCompletedNormally(f, v1);
851 >        assertEquals(0, a.get());
852 >    }}
853  
854      /**
855 <     * handle action completes normally with function value on either
856 <     * normal or exceptional completion of source
855 >     * exceptionally action completes with function value on source
856 >     * exception
857       */
858 <    public void testHandle() {
859 <        CompletableFuture<Integer> f, g;
860 <        IntegerHandler r;
861 <
862 <        f = new CompletableFuture<>();
863 <        f.completeExceptionally(new CFException());
864 <        g = f.handle(r = new IntegerHandler());
865 <        assertTrue(r.ran);
866 <        checkCompletedNormally(g, three);
867 <
868 <        f = new CompletableFuture<>();
869 <        g = f.handle(r = new IntegerHandler());
870 <        assertFalse(r.ran);
871 <        f.completeExceptionally(new CFException());
872 <        checkCompletedNormally(g, three);
873 <        assertTrue(r.ran);
691 <
692 <        f = new CompletableFuture<>();
693 <        f.complete(one);
694 <        g = f.handle(r = new IntegerHandler());
695 <        assertTrue(r.ran);
696 <        checkCompletedNormally(g, two);
697 <
698 <        f = new CompletableFuture<>();
699 <        g = f.handle(r = new IntegerHandler());
700 <        assertFalse(r.ran);
701 <        f.complete(one);
702 <        assertTrue(r.ran);
703 <        checkCompletedNormally(g, two);
704 <    }
858 >    public void testExceptionally_exceptionalCompletion() {
859 >        for (boolean createIncomplete : new boolean[] { true, false })
860 >        for (Integer v1 : new Integer[] { 1, null })
861 >    {
862 >        final AtomicInteger a = new AtomicInteger(0);
863 >        final CFException ex = new CFException();
864 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
865 >        if (!createIncomplete) f.completeExceptionally(ex);
866 >        final CompletableFuture<Integer> g = f.exceptionally
867 >            ((Throwable t) -> {
868 >                ExecutionMode.SYNC.checkExecutionMode();
869 >                threadAssertSame(t, ex);
870 >                a.getAndIncrement();
871 >                return v1;
872 >            });
873 >        if (createIncomplete) f.completeExceptionally(ex);
874  
875 <    /**
876 <     * runAsync completes after running Runnable
877 <     */
709 <    public void testRunAsync() {
710 <        Noop r = new Noop();
711 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r);
712 <        assertNull(f.join());
713 <        assertTrue(r.ran);
714 <        checkCompletedNormally(f, null);
715 <    }
875 >        checkCompletedNormally(g, v1);
876 >        assertEquals(1, a.get());
877 >    }}
878  
879      /**
880 <     * runAsync with executor completes after running Runnable
880 >     * If an "exceptionally action" throws an exception, it completes
881 >     * exceptionally with that exception
882       */
883 <    public void testRunAsync2() {
884 <        Noop r = new Noop();
885 <        ThreadExecutor exec = new ThreadExecutor();
886 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r, exec);
887 <        assertNull(f.join());
888 <        assertTrue(r.ran);
889 <        checkCompletedNormally(f, null);
890 <        assertEquals(1, exec.count.get());
891 <    }
883 >    public void testExceptionally_exceptionalCompletionActionFailed() {
884 >        for (boolean createIncomplete : new boolean[] { true, false })
885 >    {
886 >        final AtomicInteger a = new AtomicInteger(0);
887 >        final CFException ex1 = new CFException();
888 >        final CFException ex2 = new CFException();
889 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
890 >        if (!createIncomplete) f.completeExceptionally(ex1);
891 >        final CompletableFuture<Integer> g = f.exceptionally
892 >            ((Throwable t) -> {
893 >                ExecutionMode.SYNC.checkExecutionMode();
894 >                threadAssertSame(t, ex1);
895 >                a.getAndIncrement();
896 >                throw ex2;
897 >            });
898 >        if (createIncomplete) f.completeExceptionally(ex1);
899 >
900 >        checkCompletedWithWrappedException(g, ex2);
901 >        checkCompletedExceptionally(f, ex1);
902 >        assertEquals(1, a.get());
903 >    }}
904  
905      /**
906 <     * failing runAsync completes exceptionally after running Runnable
906 >     * whenComplete action executes on normal completion, propagating
907 >     * source result.
908       */
909 <    public void testRunAsync3() {
910 <        FailingNoop r = new FailingNoop();
911 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r);
912 <        checkCompletedWithWrappedCFException(f);
913 <        assertTrue(r.ran);
914 <    }
909 >    public void testWhenComplete_normalCompletion() {
910 >        for (ExecutionMode m : ExecutionMode.values())
911 >        for (boolean createIncomplete : new boolean[] { true, false })
912 >        for (Integer v1 : new Integer[] { 1, null })
913 >    {
914 >        final AtomicInteger a = new AtomicInteger(0);
915 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
916 >        if (!createIncomplete) assertTrue(f.complete(v1));
917 >        final CompletableFuture<Integer> g = m.whenComplete
918 >            (f,
919 >             (Integer result, Throwable t) -> {
920 >                m.checkExecutionMode();
921 >                threadAssertSame(result, v1);
922 >                threadAssertNull(t);
923 >                a.getAndIncrement();
924 >            });
925 >        if (createIncomplete) assertTrue(f.complete(v1));
926  
927 <    /**
928 <     * supplyAsync completes with result of supplier
929 <     */
930 <    public void testSupplyAsync() {
744 <        CompletableFuture<Integer> f;
745 <        f = CompletableFuture.supplyAsync(supplyOne);
746 <        assertEquals(f.join(), one);
747 <        checkCompletedNormally(f, one);
748 <    }
927 >        checkCompletedNormally(g, v1);
928 >        checkCompletedNormally(f, v1);
929 >        assertEquals(1, a.get());
930 >    }}
931  
932      /**
933 <     * supplyAsync with executor completes with result of supplier
933 >     * whenComplete action executes on exceptional completion, propagating
934 >     * source result.
935       */
936 <    public void testSupplyAsync2() {
937 <        CompletableFuture<Integer> f;
938 <        f = CompletableFuture.supplyAsync(supplyOne, new ThreadExecutor());
939 <        assertEquals(f.join(), one);
940 <        checkCompletedNormally(f, one);
941 <    }
936 >    public void testWhenComplete_exceptionalCompletion() {
937 >        for (ExecutionMode m : ExecutionMode.values())
938 >        for (boolean createIncomplete : new boolean[] { true, false })
939 >    {
940 >        final AtomicInteger a = new AtomicInteger(0);
941 >        final CFException ex = new CFException();
942 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
943 >        if (!createIncomplete) f.completeExceptionally(ex);
944 >        final CompletableFuture<Integer> g = m.whenComplete
945 >            (f,
946 >             (Integer result, Throwable t) -> {
947 >                m.checkExecutionMode();
948 >                threadAssertNull(result);
949 >                threadAssertSame(t, ex);
950 >                a.getAndIncrement();
951 >            });
952 >        if (createIncomplete) f.completeExceptionally(ex);
953 >
954 >        checkCompletedWithWrappedException(g, ex);
955 >        checkCompletedExceptionally(f, ex);
956 >        assertEquals(1, a.get());
957 >    }}
958  
959      /**
960 <     * Failing supplyAsync completes exceptionally
960 >     * whenComplete action executes on cancelled source, propagating
961 >     * CancellationException.
962       */
963 <    public void testSupplyAsync3() {
964 <        FailingSupplier r = new FailingSupplier();
965 <        CompletableFuture<Integer> f = CompletableFuture.supplyAsync(r);
966 <        checkCompletedWithWrappedCFException(f);
967 <        assertTrue(r.ran);
968 <    }
963 >    public void testWhenComplete_sourceCancelled() {
964 >        for (ExecutionMode m : ExecutionMode.values())
965 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
966 >        for (boolean createIncomplete : new boolean[] { true, false })
967 >    {
968 >        final AtomicInteger a = new AtomicInteger(0);
969 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
970 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
971 >        final CompletableFuture<Integer> g = m.whenComplete
972 >            (f,
973 >             (Integer result, Throwable t) -> {
974 >                m.checkExecutionMode();
975 >                threadAssertNull(result);
976 >                threadAssertTrue(t instanceof CancellationException);
977 >                a.getAndIncrement();
978 >            });
979 >        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
980  
981 <    // seq completion methods
981 >        checkCompletedWithWrappedCancellationException(g);
982 >        checkCancelled(f);
983 >        assertEquals(1, a.get());
984 >    }}
985  
986      /**
987 <     * thenRun result completes normally after normal completion of source
987 >     * If a whenComplete action throws an exception when triggered by
988 >     * a normal completion, it completes exceptionally
989       */
990 <    public void testThenRun() {
991 <        CompletableFuture<Integer> f;
992 <        CompletableFuture<Void> g;
993 <        Noop r;
994 <
995 <        f = new CompletableFuture<>();
996 <        g = f.thenRun(r = new Noop());
997 <        f.complete(null);
998 <        checkCompletedNormally(g, null);
999 <        assertTrue(r.ran);
990 >    public void testWhenComplete_sourceCompletedNormallyActionFailed() {
991 >        for (boolean createIncomplete : new boolean[] { true, false })
992 >        for (ExecutionMode m : ExecutionMode.values())
993 >        for (Integer v1 : new Integer[] { 1, null })
994 >    {
995 >        final AtomicInteger a = new AtomicInteger(0);
996 >        final CFException ex = new CFException();
997 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
998 >        if (!createIncomplete) assertTrue(f.complete(v1));
999 >        final CompletableFuture<Integer> g = m.whenComplete
1000 >            (f,
1001 >             (Integer result, Throwable t) -> {
1002 >                m.checkExecutionMode();
1003 >                threadAssertSame(result, v1);
1004 >                threadAssertNull(t);
1005 >                a.getAndIncrement();
1006 >                throw ex;
1007 >            });
1008 >        if (createIncomplete) assertTrue(f.complete(v1));
1009  
1010 <        f = new CompletableFuture<>();
1011 <        f.complete(null);
1012 <        g = f.thenRun(r = new Noop());
1013 <        checkCompletedNormally(g, null);
790 <        assertTrue(r.ran);
791 <    }
1010 >        checkCompletedWithWrappedException(g, ex);
1011 >        checkCompletedNormally(f, v1);
1012 >        assertEquals(1, a.get());
1013 >    }}
1014  
1015      /**
1016 <     * thenRun result completes exceptionally after exceptional
1017 <     * completion of source
1016 >     * If a whenComplete action throws an exception when triggered by
1017 >     * a source completion that also throws an exception, the source
1018 >     * exception takes precedence (unlike handle)
1019       */
1020 <    public void testThenRun2() {
1021 <        CompletableFuture<Integer> f;
1022 <        CompletableFuture<Void> g;
1023 <        Noop r;
1024 <
1025 <        f = new CompletableFuture<>();
1026 <        g = f.thenRun(r = new Noop());
1027 <        f.completeExceptionally(new CFException());
1028 <        checkCompletedWithWrappedCFException(g);
1029 <        assertFalse(r.ran);
1030 <
1031 <        f = new CompletableFuture<>();
1032 <        f.completeExceptionally(new CFException());
1033 <        g = f.thenRun(r = new Noop());
1034 <        checkCompletedWithWrappedCFException(g);
1035 <        assertFalse(r.ran);
1036 <    }
1020 >    public void testWhenComplete_sourceFailedActionFailed() {
1021 >        for (boolean createIncomplete : new boolean[] { true, false })
1022 >        for (ExecutionMode m : ExecutionMode.values())
1023 >    {
1024 >        final AtomicInteger a = new AtomicInteger(0);
1025 >        final CFException ex1 = new CFException();
1026 >        final CFException ex2 = new CFException();
1027 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1028 >
1029 >        if (!createIncomplete) f.completeExceptionally(ex1);
1030 >        final CompletableFuture<Integer> g = m.whenComplete
1031 >            (f,
1032 >             (Integer result, Throwable t) -> {
1033 >                m.checkExecutionMode();
1034 >                threadAssertSame(t, ex1);
1035 >                threadAssertNull(result);
1036 >                a.getAndIncrement();
1037 >                throw ex2;
1038 >            });
1039 >        if (createIncomplete) f.completeExceptionally(ex1);
1040 >
1041 >        checkCompletedWithWrappedException(g, ex1);
1042 >        checkCompletedExceptionally(f, ex1);
1043 >        if (testImplementationDetails) {
1044 >            assertEquals(1, ex1.getSuppressed().length);
1045 >            assertSame(ex2, ex1.getSuppressed()[0]);
1046 >        }
1047 >        assertEquals(1, a.get());
1048 >    }}
1049  
1050      /**
1051 <     * thenRun result completes exceptionally if action does
1051 >     * handle action completes normally with function value on normal
1052 >     * completion of source
1053       */
1054 <    public void testThenRun3() {
1055 <        CompletableFuture<Integer> f;
1056 <        CompletableFuture<Void> g;
1057 <        FailingNoop r;
1058 <
1059 <        f = new CompletableFuture<>();
1060 <        g = f.thenRun(r = new FailingNoop());
1061 <        f.complete(null);
1062 <        checkCompletedWithWrappedCFException(g);
1054 >    public void testHandle_normalCompletion() {
1055 >        for (ExecutionMode m : ExecutionMode.values())
1056 >        for (boolean createIncomplete : new boolean[] { true, false })
1057 >        for (Integer v1 : new Integer[] { 1, null })
1058 >    {
1059 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1060 >        final AtomicInteger a = new AtomicInteger(0);
1061 >        if (!createIncomplete) assertTrue(f.complete(v1));
1062 >        final CompletableFuture<Integer> g = m.handle
1063 >            (f,
1064 >             (Integer result, Throwable t) -> {
1065 >                m.checkExecutionMode();
1066 >                threadAssertSame(result, v1);
1067 >                threadAssertNull(t);
1068 >                a.getAndIncrement();
1069 >                return inc(v1);
1070 >            });
1071 >        if (createIncomplete) assertTrue(f.complete(v1));
1072  
1073 <        f = new CompletableFuture<>();
1074 <        f.complete(null);
1075 <        g = f.thenRun(r = new FailingNoop());
1076 <        checkCompletedWithWrappedCFException(g);
832 <    }
1073 >        checkCompletedNormally(g, inc(v1));
1074 >        checkCompletedNormally(f, v1);
1075 >        assertEquals(1, a.get());
1076 >    }}
1077  
1078      /**
1079 <     * thenRun result completes exceptionally if source cancelled
1079 >     * handle action completes normally with function value on
1080 >     * exceptional completion of source
1081       */
1082 <    public void testThenRun4() {
1083 <        CompletableFuture<Integer> f;
1084 <        CompletableFuture<Void> g;
1085 <        Noop r;
1086 <
1087 <        f = new CompletableFuture<>();
1088 <        g = f.thenRun(r = new Noop());
1089 <        assertTrue(f.cancel(true));
1090 <        checkCompletedWithWrappedCancellationException(g);
1082 >    public void testHandle_exceptionalCompletion() {
1083 >        for (ExecutionMode m : ExecutionMode.values())
1084 >        for (boolean createIncomplete : new boolean[] { true, false })
1085 >        for (Integer v1 : new Integer[] { 1, null })
1086 >    {
1087 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1088 >        final AtomicInteger a = new AtomicInteger(0);
1089 >        final CFException ex = new CFException();
1090 >        if (!createIncomplete) f.completeExceptionally(ex);
1091 >        final CompletableFuture<Integer> g = m.handle
1092 >            (f,
1093 >             (Integer result, Throwable t) -> {
1094 >                m.checkExecutionMode();
1095 >                threadAssertNull(result);
1096 >                threadAssertSame(t, ex);
1097 >                a.getAndIncrement();
1098 >                return v1;
1099 >            });
1100 >        if (createIncomplete) f.completeExceptionally(ex);
1101  
1102 <        f = new CompletableFuture<>();
1103 <        assertTrue(f.cancel(true));
1104 <        g = f.thenRun(r = new Noop());
1105 <        checkCompletedWithWrappedCancellationException(g);
851 <    }
1102 >        checkCompletedNormally(g, v1);
1103 >        checkCompletedExceptionally(f, ex);
1104 >        assertEquals(1, a.get());
1105 >    }}
1106  
1107      /**
1108 <     * thenApply result completes normally after normal completion of source
1108 >     * handle action completes normally with function value on
1109 >     * cancelled source
1110       */
1111 <    public void testThenApply() {
1112 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1113 <        CompletableFuture<Integer> g = f.thenApply(inc);
1114 <        f.complete(one);
1115 <        checkCompletedNormally(g, two);
1116 <    }
1111 >    public void testHandle_sourceCancelled() {
1112 >        for (ExecutionMode m : ExecutionMode.values())
1113 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1114 >        for (boolean createIncomplete : new boolean[] { true, false })
1115 >        for (Integer v1 : new Integer[] { 1, null })
1116 >    {
1117 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1118 >        final AtomicInteger a = new AtomicInteger(0);
1119 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1120 >        final CompletableFuture<Integer> g = m.handle
1121 >            (f,
1122 >             (Integer result, Throwable t) -> {
1123 >                m.checkExecutionMode();
1124 >                threadAssertNull(result);
1125 >                threadAssertTrue(t instanceof CancellationException);
1126 >                a.getAndIncrement();
1127 >                return v1;
1128 >            });
1129 >        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1130  
1131 <    /**
1132 <     * thenApply result completes exceptionally after exceptional
1133 <     * completion of source
1134 <     */
867 <    public void testThenApply2() {
868 <        CompletableFuture<Integer> f = new CompletableFuture<>();
869 <        CompletableFuture<Integer> g = f.thenApply(inc);
870 <        f.completeExceptionally(new CFException());
871 <        checkCompletedWithWrappedCFException(g);
872 <    }
1131 >        checkCompletedNormally(g, v1);
1132 >        checkCancelled(f);
1133 >        assertEquals(1, a.get());
1134 >    }}
1135  
1136      /**
1137 <     * thenApply result completes exceptionally if action does
1137 >     * If a "handle action" throws an exception when triggered by
1138 >     * a normal completion, it completes exceptionally
1139       */
1140 <    public void testThenApply3() {
1141 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1142 <        CompletableFuture<Integer> g = f.thenApply(new FailingFunction());
1143 <        f.complete(one);
1144 <        checkCompletedWithWrappedCFException(g);
1145 <    }
1140 >    public void testHandle_sourceCompletedNormallyActionFailed() {
1141 >        for (ExecutionMode m : ExecutionMode.values())
1142 >        for (boolean createIncomplete : new boolean[] { true, false })
1143 >        for (Integer v1 : new Integer[] { 1, null })
1144 >    {
1145 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1146 >        final AtomicInteger a = new AtomicInteger(0);
1147 >        final CFException ex = new CFException();
1148 >        if (!createIncomplete) assertTrue(f.complete(v1));
1149 >        final CompletableFuture<Integer> g = m.handle
1150 >            (f,
1151 >             (Integer result, Throwable t) -> {
1152 >                m.checkExecutionMode();
1153 >                threadAssertSame(result, v1);
1154 >                threadAssertNull(t);
1155 >                a.getAndIncrement();
1156 >                throw ex;
1157 >            });
1158 >        if (createIncomplete) assertTrue(f.complete(v1));
1159 >
1160 >        checkCompletedWithWrappedException(g, ex);
1161 >        checkCompletedNormally(f, v1);
1162 >        assertEquals(1, a.get());
1163 >    }}
1164 >
1165 >    /**
1166 >     * If a "handle action" throws an exception when triggered by
1167 >     * a source completion that also throws an exception, the action
1168 >     * exception takes precedence (unlike whenComplete)
1169 >     */
1170 >    public void testHandle_sourceFailedActionFailed() {
1171 >        for (boolean createIncomplete : new boolean[] { true, false })
1172 >        for (ExecutionMode m : ExecutionMode.values())
1173 >    {
1174 >        final AtomicInteger a = new AtomicInteger(0);
1175 >        final CFException ex1 = new CFException();
1176 >        final CFException ex2 = new CFException();
1177 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1178 >
1179 >        if (!createIncomplete) f.completeExceptionally(ex1);
1180 >        final CompletableFuture<Integer> g = m.handle
1181 >            (f,
1182 >             (Integer result, Throwable t) -> {
1183 >                m.checkExecutionMode();
1184 >                threadAssertNull(result);
1185 >                threadAssertSame(ex1, t);
1186 >                a.getAndIncrement();
1187 >                throw ex2;
1188 >            });
1189 >        if (createIncomplete) f.completeExceptionally(ex1);
1190 >
1191 >        checkCompletedWithWrappedException(g, ex2);
1192 >        checkCompletedExceptionally(f, ex1);
1193 >        assertEquals(1, a.get());
1194 >    }}
1195  
1196      /**
1197 <     * thenApply result completes exceptionally if source cancelled
1197 >     * runAsync completes after running Runnable
1198       */
1199 <    public void testThenApply4() {
1200 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1201 <        CompletableFuture<Integer> g = f.thenApply(inc);
1202 <        assertTrue(f.cancel(true));
1203 <        checkCompletedWithWrappedCancellationException(g);
1204 <    }
1199 >    public void testRunAsync_normalCompletion() {
1200 >        ExecutionMode[] executionModes = {
1201 >            ExecutionMode.ASYNC,
1202 >            ExecutionMode.EXECUTOR,
1203 >        };
1204 >        for (ExecutionMode m : executionModes)
1205 >    {
1206 >        final Noop r = new Noop(m);
1207 >        final CompletableFuture<Void> f = m.runAsync(r);
1208 >        assertNull(f.join());
1209 >        checkCompletedNormally(f, null);
1210 >        r.assertInvoked();
1211 >    }}
1212  
1213      /**
1214 <     * thenAccept result completes normally after normal completion of source
1214 >     * failing runAsync completes exceptionally after running Runnable
1215       */
1216 <    public void testThenAccept() {
1217 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1218 <        IncAction r = new IncAction();
1219 <        CompletableFuture<Void> g = f.thenAccept(r);
1220 <        f.complete(one);
1221 <        checkCompletedNormally(g, null);
1222 <        assertEquals(r.value, (Integer) 2);
1223 <    }
1216 >    public void testRunAsync_exceptionalCompletion() {
1217 >        ExecutionMode[] executionModes = {
1218 >            ExecutionMode.ASYNC,
1219 >            ExecutionMode.EXECUTOR,
1220 >        };
1221 >        for (ExecutionMode m : executionModes)
1222 >    {
1223 >        final FailingRunnable r = new FailingRunnable(m);
1224 >        final CompletableFuture<Void> f = m.runAsync(r);
1225 >        checkCompletedWithWrappedCFException(f);
1226 >        r.assertInvoked();
1227 >    }}
1228  
1229      /**
1230 <     * thenAccept result completes exceptionally after exceptional
908 <     * completion of source
1230 >     * supplyAsync completes with result of supplier
1231       */
1232 <    public void testThenAccept2() {
1233 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1234 <        IncAction r = new IncAction();
1235 <        CompletableFuture<Void> g = f.thenAccept(r);
1236 <        f.completeExceptionally(new CFException());
1237 <        checkCompletedWithWrappedCFException(g);
1238 <    }
1232 >    public void testSupplyAsync_normalCompletion() {
1233 >        ExecutionMode[] executionModes = {
1234 >            ExecutionMode.ASYNC,
1235 >            ExecutionMode.EXECUTOR,
1236 >        };
1237 >        for (ExecutionMode m : executionModes)
1238 >        for (Integer v1 : new Integer[] { 1, null })
1239 >    {
1240 >        final IntegerSupplier r = new IntegerSupplier(m, v1);
1241 >        final CompletableFuture<Integer> f = m.supplyAsync(r);
1242 >        assertSame(v1, f.join());
1243 >        checkCompletedNormally(f, v1);
1244 >        r.assertInvoked();
1245 >    }}
1246  
1247      /**
1248 <     * thenAccept result completes exceptionally if action does
1248 >     * Failing supplyAsync completes exceptionally
1249       */
1250 <    public void testThenAccept3() {
1251 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1252 <        FailingConsumer r = new FailingConsumer();
1253 <        CompletableFuture<Void> g = f.thenAccept(r);
1254 <        f.complete(one);
1255 <        checkCompletedWithWrappedCFException(g);
1256 <        assertTrue(r.ran);
1257 <    }
1250 >    public void testSupplyAsync_exceptionalCompletion() {
1251 >        ExecutionMode[] executionModes = {
1252 >            ExecutionMode.ASYNC,
1253 >            ExecutionMode.EXECUTOR,
1254 >        };
1255 >        for (ExecutionMode m : executionModes)
1256 >    {
1257 >        FailingSupplier r = new FailingSupplier(m);
1258 >        CompletableFuture<Integer> f = m.supplyAsync(r);
1259 >        checkCompletedWithWrappedCFException(f);
1260 >        r.assertInvoked();
1261 >    }}
1262  
1263 <    /**
931 <     * thenAccept result completes exceptionally if source cancelled
932 <     */
933 <    public void testThenAccept4() {
934 <        CompletableFuture<Integer> f = new CompletableFuture<>();
935 <        IncAction r = new IncAction();
936 <        CompletableFuture<Void> g = f.thenAccept(r);
937 <        assertTrue(f.cancel(true));
938 <        checkCompletedWithWrappedCancellationException(g);
939 <    }
1263 >    // seq completion methods
1264  
1265      /**
1266 <     * thenCombine result completes normally after normal completion
943 <     * of sources
1266 >     * thenRun result completes normally after normal completion of source
1267       */
1268 <    public void testThenCombine_normalCompletion1() {
1268 >    public void testThenRun_normalCompletion() {
1269          for (ExecutionMode m : ExecutionMode.values())
1270          for (Integer v1 : new Integer[] { 1, null })
1271 <        for (Integer v2 : new Integer[] { 2, null }) {
949 <
1271 >    {
1272          final CompletableFuture<Integer> f = new CompletableFuture<>();
1273 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1274 <        final SubtractFunction r = new SubtractFunction();
953 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
954 <
955 <        f.complete(v1);
956 <        checkIncomplete(h);
957 <        assertFalse(r.ran());
958 <        g.complete(v2);
1273 >        final Noop[] rs = new Noop[6];
1274 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1275  
1276 <        checkCompletedNormally(h, subtract(v1, v2));
1276 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1277 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1278 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1279 >        checkIncomplete(h0);
1280 >        checkIncomplete(h1);
1281 >        checkIncomplete(h2);
1282 >        assertTrue(f.complete(v1));
1283 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1284 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1285 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1286 >
1287 >        checkCompletedNormally(h0, null);
1288 >        checkCompletedNormally(h1, null);
1289 >        checkCompletedNormally(h2, null);
1290 >        checkCompletedNormally(h3, null);
1291 >        checkCompletedNormally(h4, null);
1292 >        checkCompletedNormally(h5, null);
1293          checkCompletedNormally(f, v1);
1294 <        checkCompletedNormally(g, v2);
1295 <        }
964 <    }
1294 >        for (Noop r : rs) r.assertInvoked();
1295 >    }}
1296  
1297 <    public void testThenCombine_normalCompletion2() {
1297 >    /**
1298 >     * thenRun result completes exceptionally after exceptional
1299 >     * completion of source
1300 >     */
1301 >    public void testThenRun_exceptionalCompletion() {
1302          for (ExecutionMode m : ExecutionMode.values())
1303 <        for (Integer v1 : new Integer[] { 1, null })
1304 <        for (Integer v2 : new Integer[] { 2, null }) {
970 <
1303 >    {
1304 >        final CFException ex = new CFException();
1305          final CompletableFuture<Integer> f = new CompletableFuture<>();
1306 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1307 <        final SubtractFunction r = new SubtractFunction();
974 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1306 >        final Noop[] rs = new Noop[6];
1307 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1308  
1309 <        g.complete(v2);
1310 <        checkIncomplete(h);
1311 <        assertFalse(r.ran());
1312 <        f.complete(v1);
1313 <
1314 <        checkCompletedNormally(h, subtract(v1, v2));
1315 <        checkCompletedNormally(f, v1);
1316 <        checkCompletedNormally(g, v2);
1317 <        }
1318 <    }
1309 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1310 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1311 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1312 >        checkIncomplete(h0);
1313 >        checkIncomplete(h1);
1314 >        checkIncomplete(h2);
1315 >        assertTrue(f.completeExceptionally(ex));
1316 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1317 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1318 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1319 >
1320 >        checkCompletedWithWrappedException(h0, ex);
1321 >        checkCompletedWithWrappedException(h1, ex);
1322 >        checkCompletedWithWrappedException(h2, ex);
1323 >        checkCompletedWithWrappedException(h3, ex);
1324 >        checkCompletedWithWrappedException(h4, ex);
1325 >        checkCompletedWithWrappedException(h5, ex);
1326 >        checkCompletedExceptionally(f, ex);
1327 >        for (Noop r : rs) r.assertNotInvoked();
1328 >    }}
1329  
1330 <    public void testThenCombine_normalCompletion3() {
1330 >    /**
1331 >     * thenRun result completes exceptionally if source cancelled
1332 >     */
1333 >    public void testThenRun_sourceCancelled() {
1334          for (ExecutionMode m : ExecutionMode.values())
1335 <        for (Integer v1 : new Integer[] { 1, null })
1336 <        for (Integer v2 : new Integer[] { 2, null }) {
991 <
1335 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1336 >    {
1337          final CompletableFuture<Integer> f = new CompletableFuture<>();
1338 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1339 <        final SubtractFunction r = new SubtractFunction();
1338 >        final Noop[] rs = new Noop[6];
1339 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1340  
1341 <        g.complete(v2);
1342 <        f.complete(v1);
1343 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1344 <
1345 <        checkCompletedNormally(h, subtract(v1, v2));
1346 <        checkCompletedNormally(f, v1);
1347 <        checkCompletedNormally(g, v2);
1348 <        }
1349 <    }
1341 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1342 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1343 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1344 >        checkIncomplete(h0);
1345 >        checkIncomplete(h1);
1346 >        checkIncomplete(h2);
1347 >        assertTrue(f.cancel(mayInterruptIfRunning));
1348 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1349 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1350 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1351 >
1352 >        checkCompletedWithWrappedCancellationException(h0);
1353 >        checkCompletedWithWrappedCancellationException(h1);
1354 >        checkCompletedWithWrappedCancellationException(h2);
1355 >        checkCompletedWithWrappedCancellationException(h3);
1356 >        checkCompletedWithWrappedCancellationException(h4);
1357 >        checkCompletedWithWrappedCancellationException(h5);
1358 >        checkCancelled(f);
1359 >        for (Noop r : rs) r.assertNotInvoked();
1360 >    }}
1361  
1362 <    public void testThenCombine_normalCompletion4() {
1362 >    /**
1363 >     * thenRun result completes exceptionally if action does
1364 >     */
1365 >    public void testThenRun_actionFailed() {
1366          for (ExecutionMode m : ExecutionMode.values())
1367          for (Integer v1 : new Integer[] { 1, null })
1368 <        for (Integer v2 : new Integer[] { 2, null }) {
1010 <
1368 >    {
1369          final CompletableFuture<Integer> f = new CompletableFuture<>();
1370 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1371 <        final SubtractFunction r = new SubtractFunction();
1014 <
1015 <        f.complete(v1);
1016 <        g.complete(v2);
1017 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1370 >        final FailingRunnable[] rs = new FailingRunnable[6];
1371 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
1372  
1373 <        checkCompletedNormally(h, subtract(v1, v2));
1373 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1374 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1375 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1376 >        assertTrue(f.complete(v1));
1377 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1378 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1379 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1380 >
1381 >        checkCompletedWithWrappedCFException(h0);
1382 >        checkCompletedWithWrappedCFException(h1);
1383 >        checkCompletedWithWrappedCFException(h2);
1384 >        checkCompletedWithWrappedCFException(h3);
1385 >        checkCompletedWithWrappedCFException(h4);
1386 >        checkCompletedWithWrappedCFException(h5);
1387          checkCompletedNormally(f, v1);
1388 <        checkCompletedNormally(g, v2);
1022 <        }
1023 <    }
1388 >    }}
1389  
1390      /**
1391 <     * thenCombine result completes exceptionally after exceptional
1027 <     * completion of either source
1391 >     * thenApply result completes normally after normal completion of source
1392       */
1393 <    public void testThenCombine_exceptionalCompletion1() {
1030 <        for (ExecutionMode m : ExecutionMode.values())
1031 <        for (Integer v1 : new Integer[] { 1, null }) {
1032 <
1033 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1034 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1035 <        final SubtractFunction r = new SubtractFunction();
1036 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1037 <        final CFException ex = new CFException();
1038 <
1039 <        f.completeExceptionally(ex);
1040 <        checkIncomplete(h);
1041 <        g.complete(v1);
1042 <
1043 <        checkCompletedWithWrappedCFException(h, ex);
1044 <        checkCompletedWithWrappedCFException(f, ex);
1045 <        assertFalse(r.ran());
1046 <        checkCompletedNormally(g, v1);
1047 <        }
1048 <    }
1049 <
1050 <    public void testThenCombine_exceptionalCompletion2() {
1393 >    public void testThenApply_normalCompletion() {
1394          for (ExecutionMode m : ExecutionMode.values())
1395 <        for (Integer v1 : new Integer[] { 1, null }) {
1396 <
1395 >        for (Integer v1 : new Integer[] { 1, null })
1396 >    {
1397          final CompletableFuture<Integer> f = new CompletableFuture<>();
1398 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1399 <        final SubtractFunction r = new SubtractFunction();
1057 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1058 <        final CFException ex = new CFException();
1398 >        final IncFunction[] rs = new IncFunction[4];
1399 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1400  
1401 <        g.completeExceptionally(ex);
1402 <        checkIncomplete(h);
1403 <        f.complete(v1);
1401 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1402 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1403 >        checkIncomplete(h0);
1404 >        checkIncomplete(h1);
1405 >        assertTrue(f.complete(v1));
1406 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1407 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1408  
1409 <        checkCompletedWithWrappedCFException(h, ex);
1410 <        checkCompletedWithWrappedCFException(g, ex);
1411 <        assertFalse(r.ran());
1409 >        checkCompletedNormally(h0, inc(v1));
1410 >        checkCompletedNormally(h1, inc(v1));
1411 >        checkCompletedNormally(h2, inc(v1));
1412 >        checkCompletedNormally(h3, inc(v1));
1413          checkCompletedNormally(f, v1);
1414 <        }
1415 <    }
1414 >        for (IncFunction r : rs) r.assertValue(inc(v1));
1415 >    }}
1416  
1417 <    public void testThenCombine_exceptionalCompletion3() {
1417 >    /**
1418 >     * thenApply result completes exceptionally after exceptional
1419 >     * completion of source
1420 >     */
1421 >    public void testThenApply_exceptionalCompletion() {
1422          for (ExecutionMode m : ExecutionMode.values())
1423 <        for (Integer v1 : new Integer[] { 1, null }) {
1074 <
1075 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1076 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1077 <        final SubtractFunction r = new SubtractFunction();
1423 >    {
1424          final CFException ex = new CFException();
1079
1080        g.completeExceptionally(ex);
1081        f.complete(v1);
1082        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1083
1084        checkCompletedWithWrappedCFException(h, ex);
1085        checkCompletedWithWrappedCFException(g, ex);
1086        assertFalse(r.ran());
1087        checkCompletedNormally(f, v1);
1088        }
1089    }
1090
1091    public void testThenCombine_exceptionalCompletion4() {
1092        for (ExecutionMode m : ExecutionMode.values())
1093        for (Integer v1 : new Integer[] { 1, null }) {
1094
1425          final CompletableFuture<Integer> f = new CompletableFuture<>();
1426 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1427 <        final SubtractFunction r = new SubtractFunction();
1098 <        final CFException ex = new CFException();
1426 >        final IncFunction[] rs = new IncFunction[4];
1427 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1428  
1429 <        f.completeExceptionally(ex);
1430 <        g.complete(v1);
1431 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1432 <
1433 <        checkCompletedWithWrappedCFException(h, ex);
1434 <        checkCompletedWithWrappedCFException(f, ex);
1435 <        assertFalse(r.ran());
1436 <        checkCompletedNormally(g, v1);
1437 <        }
1438 <    }
1429 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1430 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1431 >        assertTrue(f.completeExceptionally(ex));
1432 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1433 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1434 >
1435 >        checkCompletedWithWrappedException(h0, ex);
1436 >        checkCompletedWithWrappedException(h1, ex);
1437 >        checkCompletedWithWrappedException(h2, ex);
1438 >        checkCompletedWithWrappedException(h3, ex);
1439 >        checkCompletedExceptionally(f, ex);
1440 >        for (IncFunction r : rs) r.assertNotInvoked();
1441 >    }}
1442  
1443      /**
1444 <     * thenCombine result completes exceptionally if action does
1444 >     * thenApply result completes exceptionally if source cancelled
1445       */
1446 <    public void testThenCombine_actionFailed1() {
1446 >    public void testThenApply_sourceCancelled() {
1447          for (ExecutionMode m : ExecutionMode.values())
1448 <        for (Integer v1 : new Integer[] { 1, null })
1449 <        for (Integer v2 : new Integer[] { 2, null }) {
1118 <
1448 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1449 >    {
1450          final CompletableFuture<Integer> f = new CompletableFuture<>();
1451 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1452 <        final FailingBiFunction r = new FailingBiFunction();
1122 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1451 >        final IncFunction[] rs = new IncFunction[4];
1452 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1453  
1454 <        f.complete(v1);
1455 <        checkIncomplete(h);
1456 <        g.complete(v2);
1454 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1455 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1456 >        assertTrue(f.cancel(mayInterruptIfRunning));
1457 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1458 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1459  
1460 <        checkCompletedWithWrappedCFException(h);
1461 <        checkCompletedNormally(f, v1);
1462 <        checkCompletedNormally(g, v2);
1463 <        }
1464 <    }
1460 >        checkCompletedWithWrappedCancellationException(h0);
1461 >        checkCompletedWithWrappedCancellationException(h1);
1462 >        checkCompletedWithWrappedCancellationException(h2);
1463 >        checkCompletedWithWrappedCancellationException(h3);
1464 >        checkCancelled(f);
1465 >        for (IncFunction r : rs) r.assertNotInvoked();
1466 >    }}
1467  
1468 <    public void testThenCombine_actionFailed2() {
1468 >    /**
1469 >     * thenApply result completes exceptionally if action does
1470 >     */
1471 >    public void testThenApply_actionFailed() {
1472          for (ExecutionMode m : ExecutionMode.values())
1473          for (Integer v1 : new Integer[] { 1, null })
1474 <        for (Integer v2 : new Integer[] { 2, null }) {
1138 <
1474 >    {
1475          final CompletableFuture<Integer> f = new CompletableFuture<>();
1476 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1477 <        final FailingBiFunction r = new FailingBiFunction();
1142 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1476 >        final FailingFunction[] rs = new FailingFunction[4];
1477 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
1478  
1479 <        g.complete(v2);
1480 <        checkIncomplete(h);
1481 <        f.complete(v1);
1479 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1480 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1481 >        assertTrue(f.complete(v1));
1482 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1483 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1484  
1485 <        checkCompletedWithWrappedCFException(h);
1485 >        checkCompletedWithWrappedCFException(h0);
1486 >        checkCompletedWithWrappedCFException(h1);
1487 >        checkCompletedWithWrappedCFException(h2);
1488 >        checkCompletedWithWrappedCFException(h3);
1489          checkCompletedNormally(f, v1);
1490 <        checkCompletedNormally(g, v2);
1151 <        }
1152 <    }
1490 >    }}
1491  
1492      /**
1493 <     * thenCombine result completes exceptionally if either source cancelled
1493 >     * thenAccept result completes normally after normal completion of source
1494       */
1495 <    public void testThenCombine_sourceCancelled1() {
1495 >    public void testThenAccept_normalCompletion() {
1496          for (ExecutionMode m : ExecutionMode.values())
1497 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1498 <        for (Integer v1 : new Integer[] { 1, null }) {
1161 <
1162 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1163 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1164 <        final SubtractFunction r = new SubtractFunction();
1165 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1166 <
1167 <        assertTrue(f.cancel(mayInterruptIfRunning));
1168 <        checkIncomplete(h);
1169 <        g.complete(v1);
1170 <
1171 <        checkCompletedWithWrappedCancellationException(h);
1172 <        checkCancelled(f);
1173 <        assertFalse(r.ran());
1174 <        checkCompletedNormally(g, v1);
1175 <        }
1176 <    }
1177 <
1178 <    public void testThenCombine_sourceCancelled2() {
1179 <        for (ExecutionMode m : ExecutionMode.values())
1180 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1181 <        for (Integer v1 : new Integer[] { 1, null }) {
1182 <
1497 >        for (Integer v1 : new Integer[] { 1, null })
1498 >    {
1499          final CompletableFuture<Integer> f = new CompletableFuture<>();
1500 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1501 <        final SubtractFunction r = new SubtractFunction();
1186 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1500 >        final NoopConsumer[] rs = new NoopConsumer[4];
1501 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1502  
1503 <        assertTrue(g.cancel(mayInterruptIfRunning));
1504 <        checkIncomplete(h);
1505 <        f.complete(v1);
1503 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1504 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1505 >        checkIncomplete(h0);
1506 >        checkIncomplete(h1);
1507 >        assertTrue(f.complete(v1));
1508 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1509 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1510  
1511 <        checkCompletedWithWrappedCancellationException(h);
1512 <        checkCancelled(g);
1513 <        assertFalse(r.ran());
1511 >        checkCompletedNormally(h0, null);
1512 >        checkCompletedNormally(h1, null);
1513 >        checkCompletedNormally(h2, null);
1514 >        checkCompletedNormally(h3, null);
1515          checkCompletedNormally(f, v1);
1516 <        }
1517 <    }
1516 >        for (NoopConsumer r : rs) r.assertValue(v1);
1517 >    }}
1518  
1519 <    public void testThenCombine_sourceCancelled3() {
1519 >    /**
1520 >     * thenAccept result completes exceptionally after exceptional
1521 >     * completion of source
1522 >     */
1523 >    public void testThenAccept_exceptionalCompletion() {
1524          for (ExecutionMode m : ExecutionMode.values())
1525 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1526 <        for (Integer v1 : new Integer[] { 1, null }) {
1203 <
1525 >    {
1526 >        final CFException ex = new CFException();
1527          final CompletableFuture<Integer> f = new CompletableFuture<>();
1528 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1529 <        final SubtractFunction r = new SubtractFunction();
1528 >        final NoopConsumer[] rs = new NoopConsumer[4];
1529 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1530  
1531 <        assertTrue(g.cancel(mayInterruptIfRunning));
1532 <        f.complete(v1);
1533 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1534 <
1535 <        checkCompletedWithWrappedCancellationException(h);
1536 <        checkCancelled(g);
1537 <        assertFalse(r.ran());
1538 <        checkCompletedNormally(f, v1);
1539 <        }
1540 <    }
1531 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1532 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1533 >        assertTrue(f.completeExceptionally(ex));
1534 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1535 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1536 >
1537 >        checkCompletedWithWrappedException(h0, ex);
1538 >        checkCompletedWithWrappedException(h1, ex);
1539 >        checkCompletedWithWrappedException(h2, ex);
1540 >        checkCompletedWithWrappedException(h3, ex);
1541 >        checkCompletedExceptionally(f, ex);
1542 >        for (NoopConsumer r : rs) r.assertNotInvoked();
1543 >    }}
1544  
1545 <    public void testThenCombine_sourceCancelled4() {
1545 >    /**
1546 >     * thenAccept result completes exceptionally if source cancelled
1547 >     */
1548 >    public void testThenAccept_sourceCancelled() {
1549          for (ExecutionMode m : ExecutionMode.values())
1550          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1551 <        for (Integer v1 : new Integer[] { 1, null }) {
1223 <
1551 >    {
1552          final CompletableFuture<Integer> f = new CompletableFuture<>();
1553 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1554 <        final SubtractFunction r = new SubtractFunction();
1553 >        final NoopConsumer[] rs = new NoopConsumer[4];
1554 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1555  
1556 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1557 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1558          assertTrue(f.cancel(mayInterruptIfRunning));
1559 <        g.complete(v1);
1560 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1559 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1560 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1561  
1562 <        checkCompletedWithWrappedCancellationException(h);
1562 >        checkCompletedWithWrappedCancellationException(h0);
1563 >        checkCompletedWithWrappedCancellationException(h1);
1564 >        checkCompletedWithWrappedCancellationException(h2);
1565 >        checkCompletedWithWrappedCancellationException(h3);
1566          checkCancelled(f);
1567 <        assertFalse(r.ran());
1568 <        checkCompletedNormally(g, v1);
1236 <        }
1237 <    }
1567 >        for (NoopConsumer r : rs) r.assertNotInvoked();
1568 >    }}
1569  
1570      /**
1571 <     * thenAcceptBoth result completes normally after normal
1241 <     * completion of sources
1571 >     * thenAccept result completes exceptionally if action does
1572       */
1573 <    public void testThenAcceptBoth_normalCompletion1() {
1573 >    public void testThenAccept_actionFailed() {
1574          for (ExecutionMode m : ExecutionMode.values())
1575          for (Integer v1 : new Integer[] { 1, null })
1576 <        for (Integer v2 : new Integer[] { 2, null }) {
1247 <
1576 >    {
1577          final CompletableFuture<Integer> f = new CompletableFuture<>();
1578 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1579 <        final SubtractAction r = new SubtractAction();
1251 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1578 >        final FailingConsumer[] rs = new FailingConsumer[4];
1579 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
1580  
1581 <        f.complete(v1);
1582 <        checkIncomplete(h);
1583 <        assertFalse(r.ran());
1584 <        g.complete(v2);
1581 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1582 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1583 >        assertTrue(f.complete(v1));
1584 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1585 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1586  
1587 <        checkCompletedNormally(h, null);
1588 <        assertEquals(r.value, subtract(v1, v2));
1587 >        checkCompletedWithWrappedCFException(h0);
1588 >        checkCompletedWithWrappedCFException(h1);
1589 >        checkCompletedWithWrappedCFException(h2);
1590 >        checkCompletedWithWrappedCFException(h3);
1591          checkCompletedNormally(f, v1);
1592 <        checkCompletedNormally(g, v2);
1262 <        }
1263 <    }
1592 >    }}
1593  
1594 <    public void testThenAcceptBoth_normalCompletion2() {
1594 >    /**
1595 >     * thenCombine result completes normally after normal completion
1596 >     * of sources
1597 >     */
1598 >    public void testThenCombine_normalCompletion() {
1599          for (ExecutionMode m : ExecutionMode.values())
1600 +        for (boolean fFirst : new boolean[] { true, false })
1601          for (Integer v1 : new Integer[] { 1, null })
1602 <        for (Integer v2 : new Integer[] { 2, null }) {
1603 <
1602 >        for (Integer v2 : new Integer[] { 2, null })
1603 >    {
1604          final CompletableFuture<Integer> f = new CompletableFuture<>();
1605          final CompletableFuture<Integer> g = new CompletableFuture<>();
1606 <        final SubtractAction r = new SubtractAction();
1607 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1606 >        final SubtractFunction[] rs = new SubtractFunction[6];
1607 >        for (int i = 0; i < rs.length; i++) rs[i] = new SubtractFunction(m);
1608 >
1609 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1610 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1611 >        final Integer w1 =  fFirst ? v1 : v2;
1612 >        final Integer w2 = !fFirst ? v1 : v2;
1613 >
1614 >        final CompletableFuture<Integer> h0 = m.thenCombine(f, g, rs[0]);
1615 >        final CompletableFuture<Integer> h1 = m.thenCombine(fst, fst, rs[1]);
1616 >        assertTrue(fst.complete(w1));
1617 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, rs[2]);
1618 >        final CompletableFuture<Integer> h3 = m.thenCombine(fst, fst, rs[3]);
1619 >        checkIncomplete(h0); rs[0].assertNotInvoked();
1620 >        checkIncomplete(h2); rs[2].assertNotInvoked();
1621 >        checkCompletedNormally(h1, subtract(w1, w1));
1622 >        checkCompletedNormally(h3, subtract(w1, w1));
1623 >        rs[1].assertValue(subtract(w1, w1));
1624 >        rs[3].assertValue(subtract(w1, w1));
1625 >        assertTrue(snd.complete(w2));
1626 >        final CompletableFuture<Integer> h4 = m.thenCombine(f, g, rs[4]);
1627 >
1628 >        checkCompletedNormally(h0, subtract(v1, v2));
1629 >        checkCompletedNormally(h2, subtract(v1, v2));
1630 >        checkCompletedNormally(h4, subtract(v1, v2));
1631 >        rs[0].assertValue(subtract(v1, v2));
1632 >        rs[2].assertValue(subtract(v1, v2));
1633 >        rs[4].assertValue(subtract(v1, v2));
1634  
1275        g.complete(v2);
1276        checkIncomplete(h);
1277        assertFalse(r.ran());
1278        f.complete(v1);
1279
1280        checkCompletedNormally(h, null);
1281        assertEquals(r.value, subtract(v1, v2));
1635          checkCompletedNormally(f, v1);
1636          checkCompletedNormally(g, v2);
1637 <        }
1285 <    }
1637 >    }}
1638  
1639 <    public void testThenAcceptBoth_normalCompletion3() {
1639 >    /**
1640 >     * thenCombine result completes exceptionally after exceptional
1641 >     * completion of either source
1642 >     */
1643 >    public void testThenCombine_exceptionalCompletion() throws Throwable {
1644          for (ExecutionMode m : ExecutionMode.values())
1645 +        for (boolean fFirst : new boolean[] { true, false })
1646 +        for (boolean failFirst : new boolean[] { true, false })
1647          for (Integer v1 : new Integer[] { 1, null })
1648 <        for (Integer v2 : new Integer[] { 2, null }) {
1291 <
1648 >    {
1649          final CompletableFuture<Integer> f = new CompletableFuture<>();
1650          final CompletableFuture<Integer> g = new CompletableFuture<>();
1651 <        final SubtractAction r = new SubtractAction();
1652 <
1653 <        g.complete(v2);
1654 <        f.complete(v1);
1655 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1656 <
1657 <        checkCompletedNormally(h, null);
1658 <        assertEquals(r.value, subtract(v1, v2));
1659 <        checkCompletedNormally(f, v1);
1660 <        checkCompletedNormally(g, v2);
1661 <        }
1662 <    }
1651 >        final CFException ex = new CFException();
1652 >        final SubtractFunction r1 = new SubtractFunction(m);
1653 >        final SubtractFunction r2 = new SubtractFunction(m);
1654 >        final SubtractFunction r3 = new SubtractFunction(m);
1655 >
1656 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1657 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1658 >        final Callable<Boolean> complete1 = failFirst ?
1659 >            () -> fst.completeExceptionally(ex) :
1660 >            () -> fst.complete(v1);
1661 >        final Callable<Boolean> complete2 = failFirst ?
1662 >            () -> snd.complete(v1) :
1663 >            () -> snd.completeExceptionally(ex);
1664 >
1665 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1666 >        assertTrue(complete1.call());
1667 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1668 >        checkIncomplete(h1);
1669 >        checkIncomplete(h2);
1670 >        assertTrue(complete2.call());
1671 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1672 >
1673 >        checkCompletedWithWrappedException(h1, ex);
1674 >        checkCompletedWithWrappedException(h2, ex);
1675 >        checkCompletedWithWrappedException(h3, ex);
1676 >        r1.assertNotInvoked();
1677 >        r2.assertNotInvoked();
1678 >        r3.assertNotInvoked();
1679 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1680 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1681 >    }}
1682  
1683 <    public void testThenAcceptBoth_normalCompletion4() {
1683 >    /**
1684 >     * thenCombine result completes exceptionally if either source cancelled
1685 >     */
1686 >    public void testThenCombine_sourceCancelled() throws Throwable {
1687          for (ExecutionMode m : ExecutionMode.values())
1688 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1689 +        for (boolean fFirst : new boolean[] { true, false })
1690 +        for (boolean failFirst : new boolean[] { true, false })
1691          for (Integer v1 : new Integer[] { 1, null })
1692 <        for (Integer v2 : new Integer[] { 2, null }) {
1311 <
1692 >    {
1693          final CompletableFuture<Integer> f = new CompletableFuture<>();
1694          final CompletableFuture<Integer> g = new CompletableFuture<>();
1695 <        final SubtractAction r = new SubtractAction();
1696 <
1697 <        f.complete(v1);
1698 <        g.complete(v2);
1699 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1700 <
1701 <        checkCompletedNormally(h, null);
1702 <        assertEquals(r.value, subtract(v1, v2));
1703 <        checkCompletedNormally(f, v1);
1704 <        checkCompletedNormally(g, v2);
1705 <        }
1706 <    }
1695 >        final SubtractFunction r1 = new SubtractFunction(m);
1696 >        final SubtractFunction r2 = new SubtractFunction(m);
1697 >        final SubtractFunction r3 = new SubtractFunction(m);
1698 >
1699 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1700 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1701 >        final Callable<Boolean> complete1 = failFirst ?
1702 >            () -> fst.cancel(mayInterruptIfRunning) :
1703 >            () -> fst.complete(v1);
1704 >        final Callable<Boolean> complete2 = failFirst ?
1705 >            () -> snd.complete(v1) :
1706 >            () -> snd.cancel(mayInterruptIfRunning);
1707 >
1708 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1709 >        assertTrue(complete1.call());
1710 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1711 >        checkIncomplete(h1);
1712 >        checkIncomplete(h2);
1713 >        assertTrue(complete2.call());
1714 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1715 >
1716 >        checkCompletedWithWrappedCancellationException(h1);
1717 >        checkCompletedWithWrappedCancellationException(h2);
1718 >        checkCompletedWithWrappedCancellationException(h3);
1719 >        r1.assertNotInvoked();
1720 >        r2.assertNotInvoked();
1721 >        r3.assertNotInvoked();
1722 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1723 >        checkCancelled(failFirst ? fst : snd);
1724 >    }}
1725  
1726      /**
1727 <     * thenAcceptBoth result completes exceptionally after exceptional
1329 <     * completion of either source
1727 >     * thenCombine result completes exceptionally if action does
1728       */
1729 <    public void testThenAcceptBoth_exceptionalCompletion1() {
1729 >    public void testThenCombine_actionFailed() {
1730          for (ExecutionMode m : ExecutionMode.values())
1731 <        for (Integer v1 : new Integer[] { 1, null }) {
1732 <
1731 >        for (boolean fFirst : new boolean[] { true, false })
1732 >        for (Integer v1 : new Integer[] { 1, null })
1733 >        for (Integer v2 : new Integer[] { 2, null })
1734 >    {
1735          final CompletableFuture<Integer> f = new CompletableFuture<>();
1736          final CompletableFuture<Integer> g = new CompletableFuture<>();
1737 <        final SubtractAction r = new SubtractAction();
1738 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1739 <        final CFException ex = new CFException();
1340 <
1341 <        f.completeExceptionally(ex);
1342 <        checkIncomplete(h);
1343 <        g.complete(v1);
1737 >        final FailingBiFunction r1 = new FailingBiFunction(m);
1738 >        final FailingBiFunction r2 = new FailingBiFunction(m);
1739 >        final FailingBiFunction r3 = new FailingBiFunction(m);
1740  
1741 <        checkCompletedWithWrappedCFException(h, ex);
1742 <        checkCompletedWithWrappedCFException(f, ex);
1743 <        assertFalse(r.ran());
1744 <        checkCompletedNormally(g, v1);
1349 <        }
1350 <    }
1741 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1742 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1743 >        final Integer w1 =  fFirst ? v1 : v2;
1744 >        final Integer w2 = !fFirst ? v1 : v2;
1745  
1746 <    public void testThenAcceptBoth_exceptionalCompletion2() {
1747 <        for (ExecutionMode m : ExecutionMode.values())
1748 <        for (Integer v1 : new Integer[] { 1, null }) {
1746 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1747 >        assertTrue(fst.complete(w1));
1748 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1749 >        assertTrue(snd.complete(w2));
1750 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1751  
1752 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1753 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1754 <        final SubtractAction r = new SubtractAction();
1755 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1756 <        final CFException ex = new CFException();
1757 <
1362 <        g.completeExceptionally(ex);
1363 <        checkIncomplete(h);
1364 <        f.complete(v1);
1365 <
1366 <        checkCompletedWithWrappedCFException(h, ex);
1367 <        checkCompletedWithWrappedCFException(g, ex);
1368 <        assertFalse(r.ran());
1752 >        checkCompletedWithWrappedCFException(h1);
1753 >        checkCompletedWithWrappedCFException(h2);
1754 >        checkCompletedWithWrappedCFException(h3);
1755 >        r1.assertInvoked();
1756 >        r2.assertInvoked();
1757 >        r3.assertInvoked();
1758          checkCompletedNormally(f, v1);
1759 <        }
1760 <    }
1372 <
1373 <    public void testThenAcceptBoth_exceptionalCompletion3() {
1374 <        for (ExecutionMode m : ExecutionMode.values())
1375 <        for (Integer v1 : new Integer[] { 1, null }) {
1376 <
1377 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1378 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1379 <        final SubtractAction r = new SubtractAction();
1380 <        final CFException ex = new CFException();
1381 <
1382 <        g.completeExceptionally(ex);
1383 <        f.complete(v1);
1384 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1385 <
1386 <        checkCompletedWithWrappedCFException(h, ex);
1387 <        checkCompletedWithWrappedCFException(g, ex);
1388 <        assertFalse(r.ran());
1389 <        checkCompletedNormally(f, v1);
1390 <        }
1391 <    }
1392 <
1393 <    public void testThenAcceptBoth_exceptionalCompletion4() {
1394 <        for (ExecutionMode m : ExecutionMode.values())
1395 <        for (Integer v1 : new Integer[] { 1, null }) {
1396 <
1397 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1398 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1399 <        final SubtractAction r = new SubtractAction();
1400 <        final CFException ex = new CFException();
1401 <
1402 <        f.completeExceptionally(ex);
1403 <        g.complete(v1);
1404 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1405 <
1406 <        checkCompletedWithWrappedCFException(h, ex);
1407 <        checkCompletedWithWrappedCFException(f, ex);
1408 <        assertFalse(r.ran());
1409 <        checkCompletedNormally(g, v1);
1410 <        }
1411 <    }
1759 >        checkCompletedNormally(g, v2);
1760 >    }}
1761  
1762      /**
1763 <     * thenAcceptBoth result completes exceptionally if action does
1763 >     * thenAcceptBoth result completes normally after normal
1764 >     * completion of sources
1765       */
1766 <    public void testThenAcceptBoth_actionFailed1() {
1766 >    public void testThenAcceptBoth_normalCompletion() {
1767          for (ExecutionMode m : ExecutionMode.values())
1768 +        for (boolean fFirst : new boolean[] { true, false })
1769          for (Integer v1 : new Integer[] { 1, null })
1770 <        for (Integer v2 : new Integer[] { 2, null }) {
1771 <
1770 >        for (Integer v2 : new Integer[] { 2, null })
1771 >    {
1772          final CompletableFuture<Integer> f = new CompletableFuture<>();
1773          final CompletableFuture<Integer> g = new CompletableFuture<>();
1774 <        final FailingBiConsumer r = new FailingBiConsumer();
1775 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1776 <
1777 <        f.complete(v1);
1778 <        checkIncomplete(h);
1779 <        g.complete(v2);
1780 <
1781 <        checkCompletedWithWrappedCFException(h);
1774 >        final SubtractAction r1 = new SubtractAction(m);
1775 >        final SubtractAction r2 = new SubtractAction(m);
1776 >        final SubtractAction r3 = new SubtractAction(m);
1777 >
1778 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1779 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1780 >        final Integer w1 =  fFirst ? v1 : v2;
1781 >        final Integer w2 = !fFirst ? v1 : v2;
1782 >
1783 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1784 >        assertTrue(fst.complete(w1));
1785 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1786 >        checkIncomplete(h1);
1787 >        checkIncomplete(h2);
1788 >        r1.assertNotInvoked();
1789 >        r2.assertNotInvoked();
1790 >        assertTrue(snd.complete(w2));
1791 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1792 >
1793 >        checkCompletedNormally(h1, null);
1794 >        checkCompletedNormally(h2, null);
1795 >        checkCompletedNormally(h3, null);
1796 >        r1.assertValue(subtract(v1, v2));
1797 >        r2.assertValue(subtract(v1, v2));
1798 >        r3.assertValue(subtract(v1, v2));
1799          checkCompletedNormally(f, v1);
1800          checkCompletedNormally(g, v2);
1801 <        }
1434 <    }
1801 >    }}
1802  
1803 <    public void testThenAcceptBoth_actionFailed2() {
1803 >    /**
1804 >     * thenAcceptBoth result completes exceptionally after exceptional
1805 >     * completion of either source
1806 >     */
1807 >    public void testThenAcceptBoth_exceptionalCompletion() throws Throwable {
1808          for (ExecutionMode m : ExecutionMode.values())
1809 +        for (boolean fFirst : new boolean[] { true, false })
1810 +        for (boolean failFirst : new boolean[] { true, false })
1811          for (Integer v1 : new Integer[] { 1, null })
1812 <        for (Integer v2 : new Integer[] { 2, null }) {
1440 <
1812 >    {
1813          final CompletableFuture<Integer> f = new CompletableFuture<>();
1814          final CompletableFuture<Integer> g = new CompletableFuture<>();
1815 <        final FailingBiConsumer r = new FailingBiConsumer();
1816 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1817 <
1818 <        g.complete(v2);
1819 <        checkIncomplete(h);
1820 <        f.complete(v1);
1821 <
1822 <        checkCompletedWithWrappedCFException(h);
1823 <        checkCompletedNormally(f, v1);
1824 <        checkCompletedNormally(g, v2);
1825 <        }
1826 <    }
1815 >        final CFException ex = new CFException();
1816 >        final SubtractAction r1 = new SubtractAction(m);
1817 >        final SubtractAction r2 = new SubtractAction(m);
1818 >        final SubtractAction r3 = new SubtractAction(m);
1819 >
1820 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1821 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1822 >        final Callable<Boolean> complete1 = failFirst ?
1823 >            () -> fst.completeExceptionally(ex) :
1824 >            () -> fst.complete(v1);
1825 >        final Callable<Boolean> complete2 = failFirst ?
1826 >            () -> snd.complete(v1) :
1827 >            () -> snd.completeExceptionally(ex);
1828 >
1829 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1830 >        assertTrue(complete1.call());
1831 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1832 >        checkIncomplete(h1);
1833 >        checkIncomplete(h2);
1834 >        assertTrue(complete2.call());
1835 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1836 >
1837 >        checkCompletedWithWrappedException(h1, ex);
1838 >        checkCompletedWithWrappedException(h2, ex);
1839 >        checkCompletedWithWrappedException(h3, ex);
1840 >        r1.assertNotInvoked();
1841 >        r2.assertNotInvoked();
1842 >        r3.assertNotInvoked();
1843 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1844 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1845 >    }}
1846  
1847      /**
1848       * thenAcceptBoth result completes exceptionally if either source cancelled
1849       */
1850 <    public void testThenAcceptBoth_sourceCancelled1() {
1850 >    public void testThenAcceptBoth_sourceCancelled() throws Throwable {
1851          for (ExecutionMode m : ExecutionMode.values())
1852          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1853 <        for (Integer v1 : new Integer[] { 1, null }) {
1854 <
1855 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1856 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1466 <        final SubtractAction r = new SubtractAction();
1467 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1468 <
1469 <        assertTrue(f.cancel(mayInterruptIfRunning));
1470 <        checkIncomplete(h);
1471 <        g.complete(v1);
1472 <
1473 <        checkCompletedWithWrappedCancellationException(h);
1474 <        checkCancelled(f);
1475 <        assertFalse(r.ran());
1476 <        checkCompletedNormally(g, v1);
1477 <        }
1478 <    }
1479 <
1480 <    public void testThenAcceptBoth_sourceCancelled2() {
1481 <        for (ExecutionMode m : ExecutionMode.values())
1482 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1483 <        for (Integer v1 : new Integer[] { 1, null }) {
1484 <
1485 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1486 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1487 <        final SubtractAction r = new SubtractAction();
1488 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1489 <
1490 <        assertTrue(g.cancel(mayInterruptIfRunning));
1491 <        checkIncomplete(h);
1492 <        f.complete(v1);
1493 <
1494 <        checkCompletedWithWrappedCancellationException(h);
1495 <        checkCancelled(g);
1496 <        assertFalse(r.ran());
1497 <        checkCompletedNormally(f, v1);
1498 <        }
1499 <    }
1500 <
1501 <    public void testThenAcceptBoth_sourceCancelled3() {
1502 <        for (ExecutionMode m : ExecutionMode.values())
1503 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1504 <        for (Integer v1 : new Integer[] { 1, null }) {
1505 <
1506 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1507 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1508 <        final SubtractAction r = new SubtractAction();
1509 <
1510 <        assertTrue(g.cancel(mayInterruptIfRunning));
1511 <        f.complete(v1);
1512 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1513 <
1514 <        checkCompletedWithWrappedCancellationException(h);
1515 <        checkCancelled(g);
1516 <        assertFalse(r.ran());
1517 <        checkCompletedNormally(f, v1);
1518 <        }
1519 <    }
1520 <
1521 <    public void testThenAcceptBoth_sourceCancelled4() {
1522 <        for (ExecutionMode m : ExecutionMode.values())
1523 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1524 <        for (Integer v1 : new Integer[] { 1, null }) {
1525 <
1853 >        for (boolean fFirst : new boolean[] { true, false })
1854 >        for (boolean failFirst : new boolean[] { true, false })
1855 >        for (Integer v1 : new Integer[] { 1, null })
1856 >    {
1857          final CompletableFuture<Integer> f = new CompletableFuture<>();
1858          final CompletableFuture<Integer> g = new CompletableFuture<>();
1859 <        final SubtractAction r = new SubtractAction();
1860 <
1861 <        assertTrue(f.cancel(mayInterruptIfRunning));
1862 <        g.complete(v1);
1863 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1864 <
1865 <        checkCompletedWithWrappedCancellationException(h);
1866 <        checkCancelled(f);
1867 <        assertFalse(r.ran());
1868 <        checkCompletedNormally(g, v1);
1869 <        }
1870 <    }
1859 >        final SubtractAction r1 = new SubtractAction(m);
1860 >        final SubtractAction r2 = new SubtractAction(m);
1861 >        final SubtractAction r3 = new SubtractAction(m);
1862 >
1863 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1864 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1865 >        final Callable<Boolean> complete1 = failFirst ?
1866 >            () -> fst.cancel(mayInterruptIfRunning) :
1867 >            () -> fst.complete(v1);
1868 >        final Callable<Boolean> complete2 = failFirst ?
1869 >            () -> snd.complete(v1) :
1870 >            () -> snd.cancel(mayInterruptIfRunning);
1871 >
1872 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1873 >        assertTrue(complete1.call());
1874 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1875 >        checkIncomplete(h1);
1876 >        checkIncomplete(h2);
1877 >        assertTrue(complete2.call());
1878 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1879 >
1880 >        checkCompletedWithWrappedCancellationException(h1);
1881 >        checkCompletedWithWrappedCancellationException(h2);
1882 >        checkCompletedWithWrappedCancellationException(h3);
1883 >        r1.assertNotInvoked();
1884 >        r2.assertNotInvoked();
1885 >        r3.assertNotInvoked();
1886 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1887 >        checkCancelled(failFirst ? fst : snd);
1888 >    }}
1889  
1890      /**
1891 <     * runAfterBoth result completes normally after normal
1543 <     * completion of sources
1891 >     * thenAcceptBoth result completes exceptionally if action does
1892       */
1893 <    public void testRunAfterBoth_normalCompletion1() {
1893 >    public void testThenAcceptBoth_actionFailed() {
1894          for (ExecutionMode m : ExecutionMode.values())
1895 +        for (boolean fFirst : new boolean[] { true, false })
1896          for (Integer v1 : new Integer[] { 1, null })
1897 <        for (Integer v2 : new Integer[] { 2, null }) {
1898 <
1897 >        for (Integer v2 : new Integer[] { 2, null })
1898 >    {
1899          final CompletableFuture<Integer> f = new CompletableFuture<>();
1900          final CompletableFuture<Integer> g = new CompletableFuture<>();
1901 <        final Noop r = new Noop();
1902 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1901 >        final FailingBiConsumer r1 = new FailingBiConsumer(m);
1902 >        final FailingBiConsumer r2 = new FailingBiConsumer(m);
1903 >        final FailingBiConsumer r3 = new FailingBiConsumer(m);
1904  
1905 <        f.complete(v1);
1906 <        checkIncomplete(h);
1907 <        assertFalse(r.ran);
1908 <        g.complete(v2);
1559 <
1560 <        checkCompletedNormally(h, null);
1561 <        assertTrue(r.ran);
1562 <        checkCompletedNormally(f, v1);
1563 <        checkCompletedNormally(g, v2);
1564 <        }
1565 <    }
1905 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1906 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1907 >        final Integer w1 =  fFirst ? v1 : v2;
1908 >        final Integer w2 = !fFirst ? v1 : v2;
1909  
1910 <    public void testRunAfterBoth_normalCompletion2() {
1911 <        for (ExecutionMode m : ExecutionMode.values())
1912 <        for (Integer v1 : new Integer[] { 1, null })
1913 <        for (Integer v2 : new Integer[] { 2, null }) {
1910 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1911 >        assertTrue(fst.complete(w1));
1912 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1913 >        assertTrue(snd.complete(w2));
1914 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1915  
1916 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1917 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1918 <        final Noop r = new Noop();
1919 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1920 <
1921 <        g.complete(v2);
1578 <        checkIncomplete(h);
1579 <        assertFalse(r.ran);
1580 <        f.complete(v1);
1581 <
1582 <        checkCompletedNormally(h, null);
1583 <        assertTrue(r.ran);
1916 >        checkCompletedWithWrappedCFException(h1);
1917 >        checkCompletedWithWrappedCFException(h2);
1918 >        checkCompletedWithWrappedCFException(h3);
1919 >        r1.assertInvoked();
1920 >        r2.assertInvoked();
1921 >        r3.assertInvoked();
1922          checkCompletedNormally(f, v1);
1923          checkCompletedNormally(g, v2);
1924 <        }
1587 <    }
1924 >    }}
1925  
1926 <    public void testRunAfterBoth_normalCompletion3() {
1927 <        for (ExecutionMode m : ExecutionMode.values())
1928 <        for (Integer v1 : new Integer[] { 1, null })
1929 <        for (Integer v2 : new Integer[] { 2, null }) {
1930 <
1594 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1595 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1596 <        final Noop r = new Noop();
1597 <
1598 <        g.complete(v2);
1599 <        f.complete(v1);
1600 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1601 <
1602 <        checkCompletedNormally(h, null);
1603 <        assertTrue(r.ran);
1604 <        checkCompletedNormally(f, v1);
1605 <        checkCompletedNormally(g, v2);
1606 <        }
1607 <    }
1608 <
1609 <    public void testRunAfterBoth_normalCompletion4() {
1926 >    /**
1927 >     * runAfterBoth result completes normally after normal
1928 >     * completion of sources
1929 >     */
1930 >    public void testRunAfterBoth_normalCompletion() {
1931          for (ExecutionMode m : ExecutionMode.values())
1932 +        for (boolean fFirst : new boolean[] { true, false })
1933          for (Integer v1 : new Integer[] { 1, null })
1934 <        for (Integer v2 : new Integer[] { 2, null }) {
1935 <
1934 >        for (Integer v2 : new Integer[] { 2, null })
1935 >    {
1936          final CompletableFuture<Integer> f = new CompletableFuture<>();
1937          final CompletableFuture<Integer> g = new CompletableFuture<>();
1938 <        final Noop r = new Noop();
1939 <
1940 <        f.complete(v1);
1941 <        g.complete(v2);
1942 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1943 <
1944 <        checkCompletedNormally(h, null);
1945 <        assertTrue(r.ran);
1938 >        final Noop r1 = new Noop(m);
1939 >        final Noop r2 = new Noop(m);
1940 >        final Noop r3 = new Noop(m);
1941 >
1942 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1943 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1944 >        final Integer w1 =  fFirst ? v1 : v2;
1945 >        final Integer w2 = !fFirst ? v1 : v2;
1946 >
1947 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
1948 >        assertTrue(fst.complete(w1));
1949 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
1950 >        checkIncomplete(h1);
1951 >        checkIncomplete(h2);
1952 >        r1.assertNotInvoked();
1953 >        r2.assertNotInvoked();
1954 >        assertTrue(snd.complete(w2));
1955 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
1956 >
1957 >        checkCompletedNormally(h1, null);
1958 >        checkCompletedNormally(h2, null);
1959 >        checkCompletedNormally(h3, null);
1960 >        r1.assertInvoked();
1961 >        r2.assertInvoked();
1962 >        r3.assertInvoked();
1963          checkCompletedNormally(f, v1);
1964          checkCompletedNormally(g, v2);
1965 <        }
1627 <    }
1965 >    }}
1966  
1967      /**
1968       * runAfterBoth result completes exceptionally after exceptional
1969       * completion of either source
1970       */
1971 <    public void testRunAfterBoth_exceptionalCompletion1() {
1634 <        for (ExecutionMode m : ExecutionMode.values())
1635 <        for (Integer v1 : new Integer[] { 1, null }) {
1636 <
1637 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1638 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1639 <        final Noop r = new Noop();
1640 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1641 <        final CFException ex = new CFException();
1642 <
1643 <        f.completeExceptionally(ex);
1644 <        checkIncomplete(h);
1645 <        g.complete(v1);
1646 <
1647 <        checkCompletedWithWrappedCFException(h, ex);
1648 <        checkCompletedWithWrappedCFException(f, ex);
1649 <        assertFalse(r.ran);
1650 <        checkCompletedNormally(g, v1);
1651 <        }
1652 <    }
1653 <
1654 <    public void testRunAfterBoth_exceptionalCompletion2() {
1655 <        for (ExecutionMode m : ExecutionMode.values())
1656 <        for (Integer v1 : new Integer[] { 1, null }) {
1657 <
1658 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1659 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1660 <        final Noop r = new Noop();
1661 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1662 <        final CFException ex = new CFException();
1663 <
1664 <        g.completeExceptionally(ex);
1665 <        checkIncomplete(h);
1666 <        f.complete(v1);
1667 <
1668 <        checkCompletedWithWrappedCFException(h, ex);
1669 <        checkCompletedWithWrappedCFException(g, ex);
1670 <        assertFalse(r.ran);
1671 <        checkCompletedNormally(f, v1);
1672 <        }
1673 <    }
1674 <
1675 <    public void testRunAfterBoth_exceptionalCompletion3() {
1971 >    public void testRunAfterBoth_exceptionalCompletion() throws Throwable {
1972          for (ExecutionMode m : ExecutionMode.values())
1973 <        for (Integer v1 : new Integer[] { 1, null }) {
1974 <
1975 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1976 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1681 <        final Noop r = new Noop();
1682 <        final CFException ex = new CFException();
1683 <
1684 <        g.completeExceptionally(ex);
1685 <        f.complete(v1);
1686 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1687 <
1688 <        checkCompletedWithWrappedCFException(h, ex);
1689 <        checkCompletedWithWrappedCFException(g, ex);
1690 <        assertFalse(r.ran);
1691 <        checkCompletedNormally(f, v1);
1692 <        }
1693 <    }
1694 <
1695 <    public void testRunAfterBoth_exceptionalCompletion4() {
1696 <        for (ExecutionMode m : ExecutionMode.values())
1697 <        for (Integer v1 : new Integer[] { 1, null }) {
1698 <
1973 >        for (boolean fFirst : new boolean[] { true, false })
1974 >        for (boolean failFirst : new boolean[] { true, false })
1975 >        for (Integer v1 : new Integer[] { 1, null })
1976 >    {
1977          final CompletableFuture<Integer> f = new CompletableFuture<>();
1978          final CompletableFuture<Integer> g = new CompletableFuture<>();
1701        final Noop r = new Noop();
1979          final CFException ex = new CFException();
1980 <
1981 <        f.completeExceptionally(ex);
1982 <        g.complete(v1);
1983 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1984 <
1985 <        checkCompletedWithWrappedCFException(h, ex);
1986 <        checkCompletedWithWrappedCFException(f, ex);
1987 <        assertFalse(r.ran);
1988 <        checkCompletedNormally(g, v1);
1989 <        }
1990 <    }
1980 >        final Noop r1 = new Noop(m);
1981 >        final Noop r2 = new Noop(m);
1982 >        final Noop r3 = new Noop(m);
1983 >
1984 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1985 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1986 >        final Callable<Boolean> complete1 = failFirst ?
1987 >            () -> fst.completeExceptionally(ex) :
1988 >            () -> fst.complete(v1);
1989 >        final Callable<Boolean> complete2 = failFirst ?
1990 >            () -> snd.complete(v1) :
1991 >            () -> snd.completeExceptionally(ex);
1992 >
1993 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
1994 >        assertTrue(complete1.call());
1995 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
1996 >        checkIncomplete(h1);
1997 >        checkIncomplete(h2);
1998 >        assertTrue(complete2.call());
1999 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2000 >
2001 >        checkCompletedWithWrappedException(h1, ex);
2002 >        checkCompletedWithWrappedException(h2, ex);
2003 >        checkCompletedWithWrappedException(h3, ex);
2004 >        r1.assertNotInvoked();
2005 >        r2.assertNotInvoked();
2006 >        r3.assertNotInvoked();
2007 >        checkCompletedNormally(failFirst ? snd : fst, v1);
2008 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
2009 >    }}
2010  
2011      /**
2012 <     * runAfterBoth result completes exceptionally if action does
2012 >     * runAfterBoth result completes exceptionally if either source cancelled
2013       */
2014 <    public void testRunAfterBoth_actionFailed1() {
1719 <        for (ExecutionMode m : ExecutionMode.values())
1720 <        for (Integer v1 : new Integer[] { 1, null })
1721 <        for (Integer v2 : new Integer[] { 2, null }) {
1722 <
1723 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1724 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1725 <        final FailingNoop r = new FailingNoop();
1726 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1727 <
1728 <        f.complete(v1);
1729 <        checkIncomplete(h);
1730 <        g.complete(v2);
1731 <
1732 <        checkCompletedWithWrappedCFException(h);
1733 <        checkCompletedNormally(f, v1);
1734 <        checkCompletedNormally(g, v2);
1735 <        }
1736 <    }
1737 <
1738 <    public void testRunAfterBoth_actionFailed2() {
2014 >    public void testRunAfterBoth_sourceCancelled() throws Throwable {
2015          for (ExecutionMode m : ExecutionMode.values())
2016 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2017 +        for (boolean fFirst : new boolean[] { true, false })
2018 +        for (boolean failFirst : new boolean[] { true, false })
2019          for (Integer v1 : new Integer[] { 1, null })
2020 <        for (Integer v2 : new Integer[] { 2, null }) {
1742 <
2020 >    {
2021          final CompletableFuture<Integer> f = new CompletableFuture<>();
2022          final CompletableFuture<Integer> g = new CompletableFuture<>();
2023 <        final FailingNoop r = new FailingNoop();
2024 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
2025 <
2026 <        g.complete(v2);
2027 <        checkIncomplete(h);
2028 <        f.complete(v1);
2029 <
2030 <        checkCompletedWithWrappedCFException(h);
2031 <        checkCompletedNormally(f, v1);
2032 <        checkCompletedNormally(g, v2);
2033 <        }
2034 <    }
2023 >        final Noop r1 = new Noop(m);
2024 >        final Noop r2 = new Noop(m);
2025 >        final Noop r3 = new Noop(m);
2026 >
2027 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2028 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2029 >        final Callable<Boolean> complete1 = failFirst ?
2030 >            () -> fst.cancel(mayInterruptIfRunning) :
2031 >            () -> fst.complete(v1);
2032 >        final Callable<Boolean> complete2 = failFirst ?
2033 >            () -> snd.complete(v1) :
2034 >            () -> snd.cancel(mayInterruptIfRunning);
2035 >
2036 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2037 >        assertTrue(complete1.call());
2038 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2039 >        checkIncomplete(h1);
2040 >        checkIncomplete(h2);
2041 >        assertTrue(complete2.call());
2042 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2043 >
2044 >        checkCompletedWithWrappedCancellationException(h1);
2045 >        checkCompletedWithWrappedCancellationException(h2);
2046 >        checkCompletedWithWrappedCancellationException(h3);
2047 >        r1.assertNotInvoked();
2048 >        r2.assertNotInvoked();
2049 >        r3.assertNotInvoked();
2050 >        checkCompletedNormally(failFirst ? snd : fst, v1);
2051 >        checkCancelled(failFirst ? fst : snd);
2052 >    }}
2053  
2054      /**
2055 <     * runAfterBoth result completes exceptionally if either source cancelled
2055 >     * runAfterBoth result completes exceptionally if action does
2056       */
2057 <    public void testRunAfterBoth_sourceCancelled1() {
2057 >    public void testRunAfterBoth_actionFailed() {
2058          for (ExecutionMode m : ExecutionMode.values())
2059 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2060 <        for (Integer v1 : new Integer[] { 1, null }) {
2061 <
2059 >        for (boolean fFirst : new boolean[] { true, false })
2060 >        for (Integer v1 : new Integer[] { 1, null })
2061 >        for (Integer v2 : new Integer[] { 2, null })
2062 >    {
2063          final CompletableFuture<Integer> f = new CompletableFuture<>();
2064          final CompletableFuture<Integer> g = new CompletableFuture<>();
2065 <        final Noop r = new Noop();
2066 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
2067 <
1771 <        assertTrue(f.cancel(mayInterruptIfRunning));
1772 <        checkIncomplete(h);
1773 <        g.complete(v1);
2065 >        final FailingRunnable r1 = new FailingRunnable(m);
2066 >        final FailingRunnable r2 = new FailingRunnable(m);
2067 >        final FailingRunnable r3 = new FailingRunnable(m);
2068  
2069 <        checkCompletedWithWrappedCancellationException(h);
2070 <        checkCancelled(f);
2071 <        assertFalse(r.ran);
2072 <        checkCompletedNormally(g, v1);
1779 <        }
1780 <    }
2069 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2070 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2071 >        final Integer w1 =  fFirst ? v1 : v2;
2072 >        final Integer w2 = !fFirst ? v1 : v2;
2073  
2074 <    public void testRunAfterBoth_sourceCancelled2() {
2075 <        for (ExecutionMode m : ExecutionMode.values())
2076 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2077 <        for (Integer v1 : new Integer[] { 1, null }) {
2074 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2075 >        assertTrue(fst.complete(w1));
2076 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2077 >        assertTrue(snd.complete(w2));
2078 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2079  
2080 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2081 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2082 <        final Noop r = new Noop();
2083 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
2084 <
2085 <        assertTrue(g.cancel(mayInterruptIfRunning));
1793 <        checkIncomplete(h);
1794 <        f.complete(v1);
1795 <
1796 <        checkCompletedWithWrappedCancellationException(h);
1797 <        checkCancelled(g);
1798 <        assertFalse(r.ran);
2080 >        checkCompletedWithWrappedCFException(h1);
2081 >        checkCompletedWithWrappedCFException(h2);
2082 >        checkCompletedWithWrappedCFException(h3);
2083 >        r1.assertInvoked();
2084 >        r2.assertInvoked();
2085 >        r3.assertInvoked();
2086          checkCompletedNormally(f, v1);
2087 <        }
2088 <    }
1802 <
1803 <    public void testRunAfterBoth_sourceCancelled3() {
1804 <        for (ExecutionMode m : ExecutionMode.values())
1805 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1806 <        for (Integer v1 : new Integer[] { 1, null }) {
1807 <
1808 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1809 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1810 <        final Noop r = new Noop();
1811 <
1812 <        assertTrue(g.cancel(mayInterruptIfRunning));
1813 <        f.complete(v1);
1814 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1815 <
1816 <        checkCompletedWithWrappedCancellationException(h);
1817 <        checkCancelled(g);
1818 <        assertFalse(r.ran);
1819 <        checkCompletedNormally(f, v1);
1820 <        }
1821 <    }
1822 <
1823 <    public void testRunAfterBoth_sourceCancelled4() {
1824 <        for (ExecutionMode m : ExecutionMode.values())
1825 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1826 <        for (Integer v1 : new Integer[] { 1, null }) {
1827 <
1828 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1829 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1830 <        final Noop r = new Noop();
1831 <
1832 <        assertTrue(f.cancel(mayInterruptIfRunning));
1833 <        g.complete(v1);
1834 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1835 <
1836 <        checkCompletedWithWrappedCancellationException(h);
1837 <        checkCancelled(f);
1838 <        assertFalse(r.ran);
1839 <        checkCompletedNormally(g, v1);
1840 <        }
1841 <    }
2087 >        checkCompletedNormally(g, v2);
2088 >    }}
2089  
2090      /**
2091       * applyToEither result completes normally after normal completion
2092       * of either source
2093       */
2094 <    public void testApplyToEither_normalCompletion1() {
2094 >    public void testApplyToEither_normalCompletion() {
2095          for (ExecutionMode m : ExecutionMode.values())
2096          for (Integer v1 : new Integer[] { 1, null })
2097 <        for (Integer v2 : new Integer[] { 2, null }) {
2098 <
2097 >        for (Integer v2 : new Integer[] { 2, null })
2098 >    {
2099          final CompletableFuture<Integer> f = new CompletableFuture<>();
2100          final CompletableFuture<Integer> g = new CompletableFuture<>();
2101 <        final IncFunction r = new IncFunction();
2102 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2101 >        final IncFunction[] rs = new IncFunction[6];
2102 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2103  
2104 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2105 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2106 +        checkIncomplete(h0);
2107 +        checkIncomplete(h1);
2108 +        rs[0].assertNotInvoked();
2109 +        rs[1].assertNotInvoked();
2110          f.complete(v1);
2111 <        checkCompletedNormally(h, inc(v1));
2112 <        g.complete(v2);
2113 <
2114 <        checkCompletedNormally(f, v1);
2115 <        checkCompletedNormally(g, v2);
2116 <        checkCompletedNormally(h, inc(v1));
1864 <        }
1865 <    }
1866 <
1867 <    public void testApplyToEither_normalCompletion2() {
1868 <        for (ExecutionMode m : ExecutionMode.values())
1869 <        for (Integer v1 : new Integer[] { 1, null })
1870 <        for (Integer v2 : new Integer[] { 2, null }) {
1871 <
1872 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1873 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1874 <        final IncFunction r = new IncFunction();
1875 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
1876 <
2111 >        checkCompletedNormally(h0, inc(v1));
2112 >        checkCompletedNormally(h1, inc(v1));
2113 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2114 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2115 >        checkCompletedNormally(h2, inc(v1));
2116 >        checkCompletedNormally(h3, inc(v1));
2117          g.complete(v2);
1878        checkCompletedNormally(h, inc(v2));
1879        f.complete(v1);
1880
1881        checkCompletedNormally(f, v1);
1882        checkCompletedNormally(g, v2);
1883        checkCompletedNormally(h, inc(v2));
1884        }
1885    }
1886    public void testApplyToEither_normalCompletion3() {
1887        for (ExecutionMode m : ExecutionMode.values())
1888        for (Integer v1 : new Integer[] { 1, null })
1889        for (Integer v2 : new Integer[] { 2, null }) {
1890
1891        final CompletableFuture<Integer> f = new CompletableFuture<>();
1892        final CompletableFuture<Integer> g = new CompletableFuture<>();
1893        final IncFunction r = new IncFunction();
2118  
2119 <        f.complete(v1);
2120 <        g.complete(v2);
2121 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2119 >        // unspecified behavior - both source completions available
2120 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2121 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2122 >        rs[4].assertValue(h4.join());
2123 >        rs[5].assertValue(h5.join());
2124 >        assertTrue(Objects.equals(inc(v1), h4.join()) ||
2125 >                   Objects.equals(inc(v2), h4.join()));
2126 >        assertTrue(Objects.equals(inc(v1), h5.join()) ||
2127 >                   Objects.equals(inc(v2), h5.join()));
2128  
2129          checkCompletedNormally(f, v1);
2130          checkCompletedNormally(g, v2);
2131 <
2132 <        // unspecified behavior
2133 <        assertTrue(Objects.equals(h.join(), inc(v1)) ||
2134 <                   Objects.equals(h.join(), inc(v2)));
2135 <        }
2136 <    }
2131 >        checkCompletedNormally(h0, inc(v1));
2132 >        checkCompletedNormally(h1, inc(v1));
2133 >        checkCompletedNormally(h2, inc(v1));
2134 >        checkCompletedNormally(h3, inc(v1));
2135 >        for (int i = 0; i < 4; i++) rs[i].assertValue(inc(v1));
2136 >    }}
2137  
2138      /**
2139       * applyToEither result completes exceptionally after exceptional
2140       * completion of either source
2141       */
2142 <    public void testApplyToEither_exceptionalCompletion1() {
2142 >    public void testApplyToEither_exceptionalCompletion() {
2143          for (ExecutionMode m : ExecutionMode.values())
2144 <        for (Integer v1 : new Integer[] { 1, null }) {
2145 <
2144 >        for (Integer v1 : new Integer[] { 1, null })
2145 >    {
2146          final CompletableFuture<Integer> f = new CompletableFuture<>();
2147          final CompletableFuture<Integer> g = new CompletableFuture<>();
1918        final IncFunction r = new IncFunction();
1919        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2148          final CFException ex = new CFException();
2149 +        final IncFunction[] rs = new IncFunction[6];
2150 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2151  
2152 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2153 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2154 +        checkIncomplete(h0);
2155 +        checkIncomplete(h1);
2156 +        rs[0].assertNotInvoked();
2157 +        rs[1].assertNotInvoked();
2158          f.completeExceptionally(ex);
2159 <        checkCompletedWithWrappedCFException(h, ex);
2159 >        checkCompletedWithWrappedException(h0, ex);
2160 >        checkCompletedWithWrappedException(h1, ex);
2161 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2162 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2163 >        checkCompletedWithWrappedException(h2, ex);
2164 >        checkCompletedWithWrappedException(h3, ex);
2165          g.complete(v1);
2166  
2167 <        assertFalse(r.ran());
2168 <        checkCompletedNormally(g, v1);
2169 <        checkCompletedWithWrappedCFException(f, ex);
2170 <        checkCompletedWithWrappedCFException(h, ex);
2171 <        }
2172 <    }
2173 <
2174 <    public void testApplyToEither_exceptionalCompletion2() {
2175 <        for (ExecutionMode m : ExecutionMode.values())
1935 <        for (Integer v1 : new Integer[] { 1, null }) {
1936 <
1937 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1938 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1939 <        final IncFunction r = new IncFunction();
1940 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
1941 <        final CFException ex = new CFException();
1942 <
1943 <        g.completeExceptionally(ex);
1944 <        checkCompletedWithWrappedCFException(h, ex);
1945 <        f.complete(v1);
1946 <
1947 <        assertFalse(r.ran());
1948 <        checkCompletedNormally(f, v1);
1949 <        checkCompletedWithWrappedCFException(g, ex);
1950 <        checkCompletedWithWrappedCFException(h, ex);
2167 >        // unspecified behavior - both source completions available
2168 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2169 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2170 >        try {
2171 >            assertEquals(inc(v1), h4.join());
2172 >            rs[4].assertValue(inc(v1));
2173 >        } catch (CompletionException ok) {
2174 >            checkCompletedWithWrappedException(h4, ex);
2175 >            rs[4].assertNotInvoked();
2176          }
1952    }
1953
1954    public void testApplyToEither_exceptionalCompletion3() {
1955        for (ExecutionMode m : ExecutionMode.values())
1956        for (Integer v1 : new Integer[] { 1, null }) {
1957
1958        final CompletableFuture<Integer> f = new CompletableFuture<>();
1959        final CompletableFuture<Integer> g = new CompletableFuture<>();
1960        final IncFunction r = new IncFunction();
1961        final CFException ex = new CFException();
1962
1963        g.completeExceptionally(ex);
1964        f.complete(v1);
1965        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
1966
1967        // unspecified behavior
1968        Integer v;
2177          try {
2178 <            assertEquals(h.join(), inc(v1));
2179 <            assertTrue(r.ran());
2178 >            assertEquals(inc(v1), h5.join());
2179 >            rs[5].assertValue(inc(v1));
2180          } catch (CompletionException ok) {
2181 <            checkCompletedWithWrappedCFException(h, ex);
2182 <            assertFalse(r.ran());
2181 >            checkCompletedWithWrappedException(h5, ex);
2182 >            rs[5].assertNotInvoked();
2183          }
2184  
2185 <        checkCompletedWithWrappedCFException(g, ex);
2186 <        checkCompletedNormally(f, v1);
2187 <        }
2188 <    }
2185 >        checkCompletedExceptionally(f, ex);
2186 >        checkCompletedNormally(g, v1);
2187 >        checkCompletedWithWrappedException(h0, ex);
2188 >        checkCompletedWithWrappedException(h1, ex);
2189 >        checkCompletedWithWrappedException(h2, ex);
2190 >        checkCompletedWithWrappedException(h3, ex);
2191 >        checkCompletedWithWrappedException(h4, ex);
2192 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2193 >    }}
2194  
2195 <    public void testApplyToEither_exceptionalCompletion4() {
2195 >    public void testApplyToEither_exceptionalCompletion2() {
2196          for (ExecutionMode m : ExecutionMode.values())
2197 <        for (Integer v1 : new Integer[] { 1, null }) {
2198 <
2197 >        for (boolean fFirst : new boolean[] { true, false })
2198 >        for (Integer v1 : new Integer[] { 1, null })
2199 >    {
2200          final CompletableFuture<Integer> f = new CompletableFuture<>();
2201          final CompletableFuture<Integer> g = new CompletableFuture<>();
1988        final IncFunction r = new IncFunction();
2202          final CFException ex = new CFException();
2203 +        final IncFunction[] rs = new IncFunction[6];
2204 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2205  
2206 <        f.completeExceptionally(ex);
2207 <        g.complete(v1);
2208 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2206 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2207 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2208 >        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2209 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2210 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2211 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2212  
2213 <        // unspecified behavior
1996 <        Integer v;
2213 >        // unspecified behavior - both source completions available
2214          try {
2215 <            assertEquals(h.join(), inc(v1));
2216 <            assertTrue(r.ran());
2215 >            assertEquals(inc(v1), h0.join());
2216 >            rs[0].assertValue(inc(v1));
2217          } catch (CompletionException ok) {
2218 <            checkCompletedWithWrappedCFException(h, ex);
2219 <            assertFalse(r.ran());
2218 >            checkCompletedWithWrappedException(h0, ex);
2219 >            rs[0].assertNotInvoked();
2220          }
2221 <
2222 <        checkCompletedWithWrappedCFException(f, ex);
2223 <        assertFalse(r.ran());
2224 <        checkCompletedNormally(g, v1);
2221 >        try {
2222 >            assertEquals(inc(v1), h1.join());
2223 >            rs[1].assertValue(inc(v1));
2224 >        } catch (CompletionException ok) {
2225 >            checkCompletedWithWrappedException(h1, ex);
2226 >            rs[1].assertNotInvoked();
2227          }
2228 <    }
2229 <
2230 <    /**
2231 <     * applyToEither result completes exceptionally if action does
2232 <     */
2233 <    public void testApplyToEither_actionFailed1() {
2234 <        for (ExecutionMode m : ExecutionMode.values())
2235 <        for (Integer v1 : new Integer[] { 1, null })
2236 <        for (Integer v2 : new Integer[] { 2, null }) {
2237 <
2238 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2239 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2240 <        final FailingFunction r = new FailingFunction();
2022 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2023 <
2024 <        f.complete(v1);
2025 <        checkCompletedWithWrappedCFException(h);
2026 <        g.complete(v2);
2027 <        checkCompletedNormally(f, v1);
2028 <        checkCompletedNormally(g, v2);
2228 >        try {
2229 >            assertEquals(inc(v1), h2.join());
2230 >            rs[2].assertValue(inc(v1));
2231 >        } catch (CompletionException ok) {
2232 >            checkCompletedWithWrappedException(h2, ex);
2233 >            rs[2].assertNotInvoked();
2234 >        }
2235 >        try {
2236 >            assertEquals(inc(v1), h3.join());
2237 >            rs[3].assertValue(inc(v1));
2238 >        } catch (CompletionException ok) {
2239 >            checkCompletedWithWrappedException(h3, ex);
2240 >            rs[3].assertNotInvoked();
2241          }
2030    }
2031
2032    public void testApplyToEither_actionFailed2() {
2033        for (ExecutionMode m : ExecutionMode.values())
2034        for (Integer v1 : new Integer[] { 1, null })
2035        for (Integer v2 : new Integer[] { 2, null }) {
2036
2037        final CompletableFuture<Integer> f = new CompletableFuture<>();
2038        final CompletableFuture<Integer> g = new CompletableFuture<>();
2039        final FailingFunction r = new FailingFunction();
2040        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2242  
2042        g.complete(v2);
2043        checkCompletedWithWrappedCFException(h);
2044        f.complete(v1);
2243          checkCompletedNormally(f, v1);
2244 <        checkCompletedNormally(g, v2);
2245 <        }
2048 <    }
2244 >        checkCompletedExceptionally(g, ex);
2245 >    }}
2246  
2247      /**
2248       * applyToEither result completes exceptionally if either source cancelled
2249       */
2250 <    public void testApplyToEither_sourceCancelled1() {
2250 >    public void testApplyToEither_sourceCancelled() {
2251          for (ExecutionMode m : ExecutionMode.values())
2252          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2253 <        for (Integer v1 : new Integer[] { 1, null }) {
2254 <
2253 >        for (Integer v1 : new Integer[] { 1, null })
2254 >    {
2255          final CompletableFuture<Integer> f = new CompletableFuture<>();
2256          final CompletableFuture<Integer> g = new CompletableFuture<>();
2257 <        final IncFunction r = new IncFunction();
2258 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2257 >        final IncFunction[] rs = new IncFunction[6];
2258 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2259  
2260 <        assertTrue(f.cancel(mayInterruptIfRunning));
2261 <        checkCompletedWithWrappedCancellationException(h);
2260 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2261 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2262 >        checkIncomplete(h0);
2263 >        checkIncomplete(h1);
2264 >        rs[0].assertNotInvoked();
2265 >        rs[1].assertNotInvoked();
2266 >        f.cancel(mayInterruptIfRunning);
2267 >        checkCompletedWithWrappedCancellationException(h0);
2268 >        checkCompletedWithWrappedCancellationException(h1);
2269 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2270 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2271 >        checkCompletedWithWrappedCancellationException(h2);
2272 >        checkCompletedWithWrappedCancellationException(h3);
2273          g.complete(v1);
2274  
2275 +        // unspecified behavior - both source completions available
2276 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2277 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2278 +        try {
2279 +            assertEquals(inc(v1), h4.join());
2280 +            rs[4].assertValue(inc(v1));
2281 +        } catch (CompletionException ok) {
2282 +            checkCompletedWithWrappedCancellationException(h4);
2283 +            rs[4].assertNotInvoked();
2284 +        }
2285 +        try {
2286 +            assertEquals(inc(v1), h5.join());
2287 +            rs[5].assertValue(inc(v1));
2288 +        } catch (CompletionException ok) {
2289 +            checkCompletedWithWrappedCancellationException(h5);
2290 +            rs[5].assertNotInvoked();
2291 +        }
2292 +
2293          checkCancelled(f);
2068        assertFalse(r.ran());
2294          checkCompletedNormally(g, v1);
2295 <        checkCompletedWithWrappedCancellationException(h);
2296 <        }
2297 <    }
2295 >        checkCompletedWithWrappedCancellationException(h0);
2296 >        checkCompletedWithWrappedCancellationException(h1);
2297 >        checkCompletedWithWrappedCancellationException(h2);
2298 >        checkCompletedWithWrappedCancellationException(h3);
2299 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2300 >    }}
2301  
2302      public void testApplyToEither_sourceCancelled2() {
2303          for (ExecutionMode m : ExecutionMode.values())
2304          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2305 <        for (Integer v1 : new Integer[] { 1, null }) {
2306 <
2305 >        for (boolean fFirst : new boolean[] { true, false })
2306 >        for (Integer v1 : new Integer[] { 1, null })
2307 >    {
2308          final CompletableFuture<Integer> f = new CompletableFuture<>();
2309          final CompletableFuture<Integer> g = new CompletableFuture<>();
2310 <        final IncFunction r = new IncFunction();
2311 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2310 >        final IncFunction[] rs = new IncFunction[6];
2311 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2312  
2313 <        assertTrue(g.cancel(mayInterruptIfRunning));
2314 <        checkCompletedWithWrappedCancellationException(h);
2315 <        f.complete(v1);
2313 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2314 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2315 >        assertTrue(fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2316 >        assertTrue(!fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2317 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2318 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2319  
2320 <        checkCancelled(g);
2321 <        assertFalse(r.ran());
2322 <        checkCompletedNormally(f, v1);
2323 <        checkCompletedWithWrappedCancellationException(h);
2320 >        // unspecified behavior - both source completions available
2321 >        try {
2322 >            assertEquals(inc(v1), h0.join());
2323 >            rs[0].assertValue(inc(v1));
2324 >        } catch (CompletionException ok) {
2325 >            checkCompletedWithWrappedCancellationException(h0);
2326 >            rs[0].assertNotInvoked();
2327          }
2093    }
2094
2095    public void testApplyToEither_sourceCancelled3() {
2096        for (ExecutionMode m : ExecutionMode.values())
2097        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2098        for (Integer v1 : new Integer[] { 1, null }) {
2099
2100        final CompletableFuture<Integer> f = new CompletableFuture<>();
2101        final CompletableFuture<Integer> g = new CompletableFuture<>();
2102        final IncFunction r = new IncFunction();
2103
2104        assertTrue(g.cancel(mayInterruptIfRunning));
2105        f.complete(v1);
2106        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2107
2108        // unspecified behavior
2109        Integer v;
2328          try {
2329 <            assertEquals(h.join(), inc(v1));
2330 <            assertTrue(r.ran());
2329 >            assertEquals(inc(v1), h1.join());
2330 >            rs[1].assertValue(inc(v1));
2331          } catch (CompletionException ok) {
2332 <            checkCompletedWithWrappedCancellationException(h);
2333 <            assertFalse(r.ran());
2332 >            checkCompletedWithWrappedCancellationException(h1);
2333 >            rs[1].assertNotInvoked();
2334          }
2335 <
2336 <        checkCancelled(g);
2337 <        checkCompletedNormally(f, v1);
2335 >        try {
2336 >            assertEquals(inc(v1), h2.join());
2337 >            rs[2].assertValue(inc(v1));
2338 >        } catch (CompletionException ok) {
2339 >            checkCompletedWithWrappedCancellationException(h2);
2340 >            rs[2].assertNotInvoked();
2341          }
2121    }
2122
2123    public void testApplyToEither_sourceCancelled4() {
2124        for (ExecutionMode m : ExecutionMode.values())
2125        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2126        for (Integer v1 : new Integer[] { 1, null }) {
2127
2128        final CompletableFuture<Integer> f = new CompletableFuture<>();
2129        final CompletableFuture<Integer> g = new CompletableFuture<>();
2130        final IncFunction r = new IncFunction();
2131
2132        assertTrue(f.cancel(mayInterruptIfRunning));
2133        g.complete(v1);
2134        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2135
2136        // unspecified behavior
2137        Integer v;
2342          try {
2343 <            assertEquals(h.join(), inc(v1));
2344 <            assertTrue(r.ran());
2343 >            assertEquals(inc(v1), h3.join());
2344 >            rs[3].assertValue(inc(v1));
2345          } catch (CompletionException ok) {
2346 <            checkCompletedWithWrappedCancellationException(h);
2347 <            assertFalse(r.ran());
2346 >            checkCompletedWithWrappedCancellationException(h3);
2347 >            rs[3].assertNotInvoked();
2348          }
2349  
2350 <        checkCancelled(f);
2351 <        checkCompletedNormally(g, v1);
2352 <        }
2149 <    }
2350 >        checkCompletedNormally(f, v1);
2351 >        checkCancelled(g);
2352 >    }}
2353  
2354      /**
2355 <     * acceptEither result completes normally after normal completion
2153 <     * of either source
2355 >     * applyToEither result completes exceptionally if action does
2356       */
2357 <    public void testAcceptEither_normalCompletion1() {
2357 >    public void testApplyToEither_actionFailed() {
2358          for (ExecutionMode m : ExecutionMode.values())
2359          for (Integer v1 : new Integer[] { 1, null })
2360 <        for (Integer v2 : new Integer[] { 2, null }) {
2361 <
2360 >        for (Integer v2 : new Integer[] { 2, null })
2361 >    {
2362          final CompletableFuture<Integer> f = new CompletableFuture<>();
2363          final CompletableFuture<Integer> g = new CompletableFuture<>();
2364 <        final IncAction r = new IncAction();
2365 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2364 >        final FailingFunction[] rs = new FailingFunction[6];
2365 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
2366  
2367 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2368 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2369          f.complete(v1);
2370 <        checkCompletedNormally(h, null);
2371 <        assertEquals(r.value, inc(v1));
2372 <        g.complete(v2);
2370 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2371 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2372 >        checkCompletedWithWrappedCFException(h0);
2373 >        checkCompletedWithWrappedCFException(h1);
2374 >        checkCompletedWithWrappedCFException(h2);
2375 >        checkCompletedWithWrappedCFException(h3);
2376 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2377  
2378 <        checkCompletedNormally(f, v1);
2171 <        checkCompletedNormally(g, v2);
2172 <        checkCompletedNormally(h, null);
2173 <        }
2174 <    }
2378 >        g.complete(v2);
2379  
2380 <    public void testAcceptEither_normalCompletion2() {
2381 <        for (ExecutionMode m : ExecutionMode.values())
2382 <        for (Integer v1 : new Integer[] { 1, null })
2179 <        for (Integer v2 : new Integer[] { 2, null }) {
2380 >        // unspecified behavior - both source completions available
2381 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2382 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2383  
2384 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2385 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2386 <        final IncAction r = new IncAction();
2387 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2388 <
2389 <        g.complete(v2);
2187 <        checkCompletedNormally(h, null);
2188 <        assertEquals(r.value, inc(v2));
2189 <        f.complete(v1);
2384 >        checkCompletedWithWrappedCFException(h4);
2385 >        assertTrue(Objects.equals(v1, rs[4].value) ||
2386 >                   Objects.equals(v2, rs[4].value));
2387 >        checkCompletedWithWrappedCFException(h5);
2388 >        assertTrue(Objects.equals(v1, rs[5].value) ||
2389 >                   Objects.equals(v2, rs[5].value));
2390  
2391          checkCompletedNormally(f, v1);
2392          checkCompletedNormally(g, v2);
2393 <        checkCompletedNormally(h, null);
2394 <        }
2395 <    }
2396 <    public void testAcceptEither_normalCompletion3() {
2393 >    }}
2394 >
2395 >    /**
2396 >     * acceptEither result completes normally after normal completion
2397 >     * of either source
2398 >     */
2399 >    public void testAcceptEither_normalCompletion() {
2400          for (ExecutionMode m : ExecutionMode.values())
2401          for (Integer v1 : new Integer[] { 1, null })
2402 <        for (Integer v2 : new Integer[] { 2, null }) {
2403 <
2402 >        for (Integer v2 : new Integer[] { 2, null })
2403 >    {
2404          final CompletableFuture<Integer> f = new CompletableFuture<>();
2405          final CompletableFuture<Integer> g = new CompletableFuture<>();
2406 <        final IncAction r = new IncAction();
2406 >        final NoopConsumer[] rs = new NoopConsumer[6];
2407 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2408 >
2409 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2410 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2411 >        checkIncomplete(h0);
2412 >        checkIncomplete(h1);
2413 >        rs[0].assertNotInvoked();
2414 >        rs[1].assertNotInvoked();
2415 >        f.complete(v1);
2416 >        checkCompletedNormally(h0, null);
2417 >        checkCompletedNormally(h1, null);
2418 >        rs[0].assertValue(v1);
2419 >        rs[1].assertValue(v1);
2420 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2421 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2422 >        checkCompletedNormally(h2, null);
2423 >        checkCompletedNormally(h3, null);
2424 >        rs[2].assertValue(v1);
2425 >        rs[3].assertValue(v1);
2426 >        g.complete(v2);
2427 >
2428 >        // unspecified behavior - both source completions available
2429 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2430 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2431 >        checkCompletedNormally(h4, null);
2432 >        checkCompletedNormally(h5, null);
2433 >        assertTrue(Objects.equals(v1, rs[4].value) ||
2434 >                   Objects.equals(v2, rs[4].value));
2435 >        assertTrue(Objects.equals(v1, rs[5].value) ||
2436 >                   Objects.equals(v2, rs[5].value));
2437  
2205        f.complete(v1);
2206        g.complete(v2);
2207        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2208
2209        checkCompletedNormally(h, null);
2438          checkCompletedNormally(f, v1);
2439          checkCompletedNormally(g, v2);
2440 <
2441 <        // unspecified behavior
2442 <        assertTrue(Objects.equals(r.value, inc(v1)) ||
2443 <                   Objects.equals(r.value, inc(v2)));
2444 <        }
2445 <    }
2440 >        checkCompletedNormally(h0, null);
2441 >        checkCompletedNormally(h1, null);
2442 >        checkCompletedNormally(h2, null);
2443 >        checkCompletedNormally(h3, null);
2444 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2445 >    }}
2446  
2447      /**
2448       * acceptEither result completes exceptionally after exceptional
2449       * completion of either source
2450       */
2451 <    public void testAcceptEither_exceptionalCompletion1() {
2451 >    public void testAcceptEither_exceptionalCompletion() {
2452          for (ExecutionMode m : ExecutionMode.values())
2453 <        for (Integer v1 : new Integer[] { 1, null }) {
2454 <
2453 >        for (Integer v1 : new Integer[] { 1, null })
2454 >    {
2455          final CompletableFuture<Integer> f = new CompletableFuture<>();
2456          final CompletableFuture<Integer> g = new CompletableFuture<>();
2229        final IncAction r = new IncAction();
2230        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2457          final CFException ex = new CFException();
2458 +        final NoopConsumer[] rs = new NoopConsumer[6];
2459 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2460  
2461 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2462 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2463 +        checkIncomplete(h0);
2464 +        checkIncomplete(h1);
2465 +        rs[0].assertNotInvoked();
2466 +        rs[1].assertNotInvoked();
2467          f.completeExceptionally(ex);
2468 <        checkCompletedWithWrappedCFException(h, ex);
2468 >        checkCompletedWithWrappedException(h0, ex);
2469 >        checkCompletedWithWrappedException(h1, ex);
2470 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2471 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2472 >        checkCompletedWithWrappedException(h2, ex);
2473 >        checkCompletedWithWrappedException(h3, ex);
2474 >
2475          g.complete(v1);
2476  
2477 <        assertFalse(r.ran());
2478 <        checkCompletedNormally(g, v1);
2479 <        checkCompletedWithWrappedCFException(f, ex);
2480 <        checkCompletedWithWrappedCFException(h, ex);
2477 >        // unspecified behavior - both source completions available
2478 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2479 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2480 >        try {
2481 >            assertNull(h4.join());
2482 >            rs[4].assertValue(v1);
2483 >        } catch (CompletionException ok) {
2484 >            checkCompletedWithWrappedException(h4, ex);
2485 >            rs[4].assertNotInvoked();
2486          }
2487 <    }
2487 >        try {
2488 >            assertNull(h5.join());
2489 >            rs[5].assertValue(v1);
2490 >        } catch (CompletionException ok) {
2491 >            checkCompletedWithWrappedException(h5, ex);
2492 >            rs[5].assertNotInvoked();
2493 >        }
2494 >
2495 >        checkCompletedExceptionally(f, ex);
2496 >        checkCompletedNormally(g, v1);
2497 >        checkCompletedWithWrappedException(h0, ex);
2498 >        checkCompletedWithWrappedException(h1, ex);
2499 >        checkCompletedWithWrappedException(h2, ex);
2500 >        checkCompletedWithWrappedException(h3, ex);
2501 >        checkCompletedWithWrappedException(h4, ex);
2502 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2503 >    }}
2504  
2505      public void testAcceptEither_exceptionalCompletion2() {
2506          for (ExecutionMode m : ExecutionMode.values())
2507 <        for (Integer v1 : new Integer[] { 1, null }) {
2508 <
2507 >        for (boolean fFirst : new boolean[] { true, false })
2508 >        for (Integer v1 : new Integer[] { 1, null })
2509 >    {
2510          final CompletableFuture<Integer> f = new CompletableFuture<>();
2511          final CompletableFuture<Integer> g = new CompletableFuture<>();
2250        final IncAction r = new IncAction();
2251        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2512          final CFException ex = new CFException();
2513 +        final NoopConsumer[] rs = new NoopConsumer[6];
2514 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2515  
2516 <        g.completeExceptionally(ex);
2517 <        checkCompletedWithWrappedCFException(h, ex);
2518 <        f.complete(v1);
2516 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2517 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2518 >        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2519 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2520 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2521 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2522  
2523 <        assertFalse(r.ran());
2524 <        checkCompletedNormally(f, v1);
2525 <        checkCompletedWithWrappedCFException(g, ex);
2526 <        checkCompletedWithWrappedCFException(h, ex);
2523 >        // unspecified behavior - both source completions available
2524 >        try {
2525 >            assertEquals(null, h0.join());
2526 >            rs[0].assertValue(v1);
2527 >        } catch (CompletionException ok) {
2528 >            checkCompletedWithWrappedException(h0, ex);
2529 >            rs[0].assertNotInvoked();
2530          }
2263    }
2264
2265    public void testAcceptEither_exceptionalCompletion3() {
2266        for (ExecutionMode m : ExecutionMode.values())
2267        for (Integer v1 : new Integer[] { 1, null }) {
2268
2269        final CompletableFuture<Integer> f = new CompletableFuture<>();
2270        final CompletableFuture<Integer> g = new CompletableFuture<>();
2271        final IncAction r = new IncAction();
2272        final CFException ex = new CFException();
2273
2274        g.completeExceptionally(ex);
2275        f.complete(v1);
2276        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2277
2278        // unspecified behavior
2279        Integer v;
2531          try {
2532 <            assertEquals(h.join(), null);
2533 <            assertTrue(r.ran());
2283 <            assertEquals(inc(v1), r.value);
2532 >            assertEquals(null, h1.join());
2533 >            rs[1].assertValue(v1);
2534          } catch (CompletionException ok) {
2535 <            checkCompletedWithWrappedCFException(h, ex);
2536 <            assertFalse(r.ran());
2535 >            checkCompletedWithWrappedException(h1, ex);
2536 >            rs[1].assertNotInvoked();
2537 >        }
2538 >        try {
2539 >            assertEquals(null, h2.join());
2540 >            rs[2].assertValue(v1);
2541 >        } catch (CompletionException ok) {
2542 >            checkCompletedWithWrappedException(h2, ex);
2543 >            rs[2].assertNotInvoked();
2544 >        }
2545 >        try {
2546 >            assertEquals(null, h3.join());
2547 >            rs[3].assertValue(v1);
2548 >        } catch (CompletionException ok) {
2549 >            checkCompletedWithWrappedException(h3, ex);
2550 >            rs[3].assertNotInvoked();
2551          }
2552  
2289        checkCompletedWithWrappedCFException(g, ex);
2553          checkCompletedNormally(f, v1);
2554 <        }
2555 <    }
2554 >        checkCompletedExceptionally(g, ex);
2555 >    }}
2556  
2557 <    public void testAcceptEither_exceptionalCompletion4() {
2557 >    /**
2558 >     * acceptEither result completes exceptionally if either source cancelled
2559 >     */
2560 >    public void testAcceptEither_sourceCancelled() {
2561          for (ExecutionMode m : ExecutionMode.values())
2562 <        for (Integer v1 : new Integer[] { 1, null }) {
2563 <
2562 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2563 >        for (Integer v1 : new Integer[] { 1, null })
2564 >    {
2565          final CompletableFuture<Integer> f = new CompletableFuture<>();
2566          final CompletableFuture<Integer> g = new CompletableFuture<>();
2567 <        final IncAction r = new IncAction();
2568 <        final CFException ex = new CFException();
2567 >        final NoopConsumer[] rs = new NoopConsumer[6];
2568 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2569 >
2570 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2571 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2572 >        checkIncomplete(h0);
2573 >        checkIncomplete(h1);
2574 >        rs[0].assertNotInvoked();
2575 >        rs[1].assertNotInvoked();
2576 >        f.cancel(mayInterruptIfRunning);
2577 >        checkCompletedWithWrappedCancellationException(h0);
2578 >        checkCompletedWithWrappedCancellationException(h1);
2579 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2580 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2581 >        checkCompletedWithWrappedCancellationException(h2);
2582 >        checkCompletedWithWrappedCancellationException(h3);
2583  
2303        f.completeExceptionally(ex);
2584          g.complete(v1);
2305        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2585  
2586 <        // unspecified behavior
2587 <        Integer v;
2586 >        // unspecified behavior - both source completions available
2587 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2588 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2589          try {
2590 <            assertEquals(h.join(), null);
2591 <            assertTrue(r.ran());
2312 <            assertEquals(inc(v1), r.value);
2590 >            assertNull(h4.join());
2591 >            rs[4].assertValue(v1);
2592          } catch (CompletionException ok) {
2593 <            checkCompletedWithWrappedCFException(h, ex);
2594 <            assertFalse(r.ran());
2593 >            checkCompletedWithWrappedCancellationException(h4);
2594 >            rs[4].assertNotInvoked();
2595 >        }
2596 >        try {
2597 >            assertNull(h5.join());
2598 >            rs[5].assertValue(v1);
2599 >        } catch (CompletionException ok) {
2600 >            checkCompletedWithWrappedCancellationException(h5);
2601 >            rs[5].assertNotInvoked();
2602          }
2603  
2604 <        checkCompletedWithWrappedCFException(f, ex);
2319 <        assertFalse(r.ran());
2604 >        checkCancelled(f);
2605          checkCompletedNormally(g, v1);
2606 <        }
2607 <    }
2606 >        checkCompletedWithWrappedCancellationException(h0);
2607 >        checkCompletedWithWrappedCancellationException(h1);
2608 >        checkCompletedWithWrappedCancellationException(h2);
2609 >        checkCompletedWithWrappedCancellationException(h3);
2610 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2611 >    }}
2612  
2613      /**
2614       * acceptEither result completes exceptionally if action does
2615       */
2616 <    public void testAcceptEither_actionFailed1() {
2616 >    public void testAcceptEither_actionFailed() {
2617          for (ExecutionMode m : ExecutionMode.values())
2618          for (Integer v1 : new Integer[] { 1, null })
2619 <        for (Integer v2 : new Integer[] { 2, null }) {
2620 <
2619 >        for (Integer v2 : new Integer[] { 2, null })
2620 >    {
2621          final CompletableFuture<Integer> f = new CompletableFuture<>();
2622          final CompletableFuture<Integer> g = new CompletableFuture<>();
2623 <        final FailingConsumer r = new FailingConsumer();
2624 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2623 >        final FailingConsumer[] rs = new FailingConsumer[6];
2624 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
2625  
2626 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2627 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2628          f.complete(v1);
2629 <        checkCompletedWithWrappedCFException(h);
2629 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2630 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2631 >        checkCompletedWithWrappedCFException(h0);
2632 >        checkCompletedWithWrappedCFException(h1);
2633 >        checkCompletedWithWrappedCFException(h2);
2634 >        checkCompletedWithWrappedCFException(h3);
2635 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2636 >
2637          g.complete(v2);
2638 +
2639 +        // unspecified behavior - both source completions available
2640 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2641 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2642 +
2643 +        checkCompletedWithWrappedCFException(h4);
2644 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2645 +                   Objects.equals(v2, rs[4].value));
2646 +        checkCompletedWithWrappedCFException(h5);
2647 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2648 +                   Objects.equals(v2, rs[5].value));
2649 +
2650          checkCompletedNormally(f, v1);
2651          checkCompletedNormally(g, v2);
2652 <        }
2343 <    }
2652 >    }}
2653  
2654 <    public void testAcceptEither_actionFailed2() {
2654 >    /**
2655 >     * runAfterEither result completes normally after normal completion
2656 >     * of either source
2657 >     */
2658 >    public void testRunAfterEither_normalCompletion() {
2659          for (ExecutionMode m : ExecutionMode.values())
2660          for (Integer v1 : new Integer[] { 1, null })
2661 <        for (Integer v2 : new Integer[] { 2, null }) {
2662 <
2661 >        for (Integer v2 : new Integer[] { 2, null })
2662 >    {
2663          final CompletableFuture<Integer> f = new CompletableFuture<>();
2664          final CompletableFuture<Integer> g = new CompletableFuture<>();
2665 <        final FailingConsumer r = new FailingConsumer();
2666 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2665 >        final Noop[] rs = new Noop[6];
2666 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2667  
2668 <        g.complete(v2);
2669 <        checkCompletedWithWrappedCFException(h);
2668 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2669 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2670 >        checkIncomplete(h0);
2671 >        checkIncomplete(h1);
2672 >        rs[0].assertNotInvoked();
2673 >        rs[1].assertNotInvoked();
2674          f.complete(v1);
2675 +        checkCompletedNormally(h0, null);
2676 +        checkCompletedNormally(h1, null);
2677 +        rs[0].assertInvoked();
2678 +        rs[1].assertInvoked();
2679 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2680 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2681 +        checkCompletedNormally(h2, null);
2682 +        checkCompletedNormally(h3, null);
2683 +        rs[2].assertInvoked();
2684 +        rs[3].assertInvoked();
2685 +
2686 +        g.complete(v2);
2687 +
2688 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2689 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2690 +
2691          checkCompletedNormally(f, v1);
2692          checkCompletedNormally(g, v2);
2693 <        }
2694 <    }
2693 >        checkCompletedNormally(h0, null);
2694 >        checkCompletedNormally(h1, null);
2695 >        checkCompletedNormally(h2, null);
2696 >        checkCompletedNormally(h3, null);
2697 >        checkCompletedNormally(h4, null);
2698 >        checkCompletedNormally(h5, null);
2699 >        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2700 >    }}
2701  
2702      /**
2703 <     * acceptEither result completes exceptionally if either source cancelled
2703 >     * runAfterEither result completes exceptionally after exceptional
2704 >     * completion of either source
2705       */
2706 <    public void testAcceptEither_sourceCancelled1() {
2706 >    public void testRunAfterEither_exceptionalCompletion() {
2707          for (ExecutionMode m : ExecutionMode.values())
2708 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2709 <        for (Integer v1 : new Integer[] { 1, null }) {
2370 <
2708 >        for (Integer v1 : new Integer[] { 1, null })
2709 >    {
2710          final CompletableFuture<Integer> f = new CompletableFuture<>();
2711          final CompletableFuture<Integer> g = new CompletableFuture<>();
2712 <        final IncAction r = new IncAction();
2713 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2712 >        final CFException ex = new CFException();
2713 >        final Noop[] rs = new Noop[6];
2714 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2715  
2716 <        assertTrue(f.cancel(mayInterruptIfRunning));
2717 <        checkCompletedWithWrappedCancellationException(h);
2718 <        g.complete(v1);
2716 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2717 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2718 >        checkIncomplete(h0);
2719 >        checkIncomplete(h1);
2720 >        rs[0].assertNotInvoked();
2721 >        rs[1].assertNotInvoked();
2722 >        assertTrue(f.completeExceptionally(ex));
2723 >        checkCompletedWithWrappedException(h0, ex);
2724 >        checkCompletedWithWrappedException(h1, ex);
2725 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2726 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2727 >        checkCompletedWithWrappedException(h2, ex);
2728 >        checkCompletedWithWrappedException(h3, ex);
2729 >
2730 >        assertTrue(g.complete(v1));
2731 >
2732 >        // unspecified behavior - both source completions available
2733 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2734 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2735 >        try {
2736 >            assertNull(h4.join());
2737 >            rs[4].assertInvoked();
2738 >        } catch (CompletionException ok) {
2739 >            checkCompletedWithWrappedException(h4, ex);
2740 >            rs[4].assertNotInvoked();
2741 >        }
2742 >        try {
2743 >            assertNull(h5.join());
2744 >            rs[5].assertInvoked();
2745 >        } catch (CompletionException ok) {
2746 >            checkCompletedWithWrappedException(h5, ex);
2747 >            rs[5].assertNotInvoked();
2748 >        }
2749  
2750 <        checkCancelled(f);
2381 <        assertFalse(r.ran());
2750 >        checkCompletedExceptionally(f, ex);
2751          checkCompletedNormally(g, v1);
2752 <        checkCompletedWithWrappedCancellationException(h);
2753 <        }
2754 <    }
2752 >        checkCompletedWithWrappedException(h0, ex);
2753 >        checkCompletedWithWrappedException(h1, ex);
2754 >        checkCompletedWithWrappedException(h2, ex);
2755 >        checkCompletedWithWrappedException(h3, ex);
2756 >        checkCompletedWithWrappedException(h4, ex);
2757 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2758 >    }}
2759  
2760 <    public void testAcceptEither_sourceCancelled2() {
2760 >    public void testRunAfterEither_exceptionalCompletion2() {
2761          for (ExecutionMode m : ExecutionMode.values())
2762 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2763 <        for (Integer v1 : new Integer[] { 1, null }) {
2764 <
2762 >        for (boolean fFirst : new boolean[] { true, false })
2763 >        for (Integer v1 : new Integer[] { 1, null })
2764 >    {
2765          final CompletableFuture<Integer> f = new CompletableFuture<>();
2766          final CompletableFuture<Integer> g = new CompletableFuture<>();
2767 <        final IncAction r = new IncAction();
2768 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2767 >        final CFException ex = new CFException();
2768 >        final Noop[] rs = new Noop[6];
2769 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2770  
2771 <        assertTrue(g.cancel(mayInterruptIfRunning));
2772 <        checkCompletedWithWrappedCancellationException(h);
2773 <        f.complete(v1);
2771 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2772 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2773 >        assertTrue( fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2774 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2775 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2776 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2777  
2778 <        checkCancelled(g);
2779 <        assertFalse(r.ran());
2780 <        checkCompletedNormally(f, v1);
2781 <        checkCompletedWithWrappedCancellationException(h);
2778 >        // unspecified behavior - both source completions available
2779 >        try {
2780 >            assertEquals(null, h0.join());
2781 >            rs[0].assertInvoked();
2782 >        } catch (CompletionException ok) {
2783 >            checkCompletedWithWrappedException(h0, ex);
2784 >            rs[0].assertNotInvoked();
2785 >        }
2786 >        try {
2787 >            assertEquals(null, h1.join());
2788 >            rs[1].assertInvoked();
2789 >        } catch (CompletionException ok) {
2790 >            checkCompletedWithWrappedException(h1, ex);
2791 >            rs[1].assertNotInvoked();
2792 >        }
2793 >        try {
2794 >            assertEquals(null, h2.join());
2795 >            rs[2].assertInvoked();
2796 >        } catch (CompletionException ok) {
2797 >            checkCompletedWithWrappedException(h2, ex);
2798 >            rs[2].assertNotInvoked();
2799          }
2406    }
2407
2408    public void testAcceptEither_sourceCancelled3() {
2409        for (ExecutionMode m : ExecutionMode.values())
2410        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2411        for (Integer v1 : new Integer[] { 1, null }) {
2412
2413        final CompletableFuture<Integer> f = new CompletableFuture<>();
2414        final CompletableFuture<Integer> g = new CompletableFuture<>();
2415        final IncAction r = new IncAction();
2416
2417        assertTrue(g.cancel(mayInterruptIfRunning));
2418        f.complete(v1);
2419        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2420
2421        // unspecified behavior
2422        Integer v;
2800          try {
2801 <            assertEquals(h.join(), null);
2802 <            assertTrue(r.ran());
2426 <            assertEquals(inc(v1), r.value);
2801 >            assertEquals(null, h3.join());
2802 >            rs[3].assertInvoked();
2803          } catch (CompletionException ok) {
2804 <            checkCompletedWithWrappedCancellationException(h);
2805 <            assertFalse(r.ran());
2804 >            checkCompletedWithWrappedException(h3, ex);
2805 >            rs[3].assertNotInvoked();
2806          }
2807  
2432        checkCancelled(g);
2808          checkCompletedNormally(f, v1);
2809 <        }
2810 <    }
2809 >        checkCompletedExceptionally(g, ex);
2810 >    }}
2811  
2812 <    public void testAcceptEither_sourceCancelled4() {
2812 >    /**
2813 >     * runAfterEither result completes exceptionally if either source cancelled
2814 >     */
2815 >    public void testRunAfterEither_sourceCancelled() {
2816          for (ExecutionMode m : ExecutionMode.values())
2817          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2818 <        for (Integer v1 : new Integer[] { 1, null }) {
2819 <
2818 >        for (Integer v1 : new Integer[] { 1, null })
2819 >    {
2820          final CompletableFuture<Integer> f = new CompletableFuture<>();
2821          final CompletableFuture<Integer> g = new CompletableFuture<>();
2822 <        final IncAction r = new IncAction();
2822 >        final Noop[] rs = new Noop[6];
2823 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2824  
2825 <        assertTrue(f.cancel(mayInterruptIfRunning));
2826 <        g.complete(v1);
2827 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2828 <
2829 <        // unspecified behavior
2830 <        Integer v;
2825 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2826 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2827 >        checkIncomplete(h0);
2828 >        checkIncomplete(h1);
2829 >        rs[0].assertNotInvoked();
2830 >        rs[1].assertNotInvoked();
2831 >        f.cancel(mayInterruptIfRunning);
2832 >        checkCompletedWithWrappedCancellationException(h0);
2833 >        checkCompletedWithWrappedCancellationException(h1);
2834 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2835 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2836 >        checkCompletedWithWrappedCancellationException(h2);
2837 >        checkCompletedWithWrappedCancellationException(h3);
2838 >
2839 >        assertTrue(g.complete(v1));
2840 >
2841 >        // unspecified behavior - both source completions available
2842 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2843 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2844 >        try {
2845 >            assertNull(h4.join());
2846 >            rs[4].assertInvoked();
2847 >        } catch (CompletionException ok) {
2848 >            checkCompletedWithWrappedCancellationException(h4);
2849 >            rs[4].assertNotInvoked();
2850 >        }
2851          try {
2852 <            assertEquals(h.join(), null);
2853 <            assertTrue(r.ran());
2455 <            assertEquals(inc(v1), r.value);
2852 >            assertNull(h5.join());
2853 >            rs[5].assertInvoked();
2854          } catch (CompletionException ok) {
2855 <            checkCompletedWithWrappedCancellationException(h);
2856 <            assertFalse(r.ran());
2855 >            checkCompletedWithWrappedCancellationException(h5);
2856 >            rs[5].assertNotInvoked();
2857          }
2858  
2859          checkCancelled(f);
2860          checkCompletedNormally(g, v1);
2861 <        }
2862 <    }
2863 <
2864 <    /**
2865 <     * runAfterEither result completes normally after normal completion
2866 <     * of either source
2469 <     */
2470 <    public void testRunAfterEither() {
2471 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2472 <        CompletableFuture<Integer> f2 = new CompletableFuture<>();
2473 <        Noop r = new Noop();
2474 <        CompletableFuture<Void> g = f.runAfterEither(f2, r);
2475 <        f.complete(one);
2476 <        checkCompletedNormally(g, null);
2477 <        f2.complete(one);
2478 <        checkCompletedNormally(g, null);
2479 <        assertTrue(r.ran);
2480 <
2481 <        r = new Noop();
2482 <        f = new CompletableFuture<>();
2483 <        f.complete(one);
2484 <        f2 = new CompletableFuture<>();
2485 <        g = f.runAfterEither(f2, r);
2486 <        checkCompletedNormally(g, null);
2487 <        assertTrue(r.ran);
2488 <    }
2489 <
2490 <    /**
2491 <     * runAfterEither result completes exceptionally after exceptional
2492 <     * completion of either source
2493 <     */
2494 <    public void testRunAfterEither2() {
2495 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2496 <        CompletableFuture<Integer> f2 = new CompletableFuture<>();
2497 <        Noop r = new Noop();
2498 <        CompletableFuture<Void> g = f.runAfterEither(f2, r);
2499 <        f.completeExceptionally(new CFException());
2500 <        f2.complete(one);
2501 <        checkCompletedWithWrappedCFException(g);
2502 <
2503 <        r = new Noop();
2504 <        f = new CompletableFuture<>();
2505 <        f2 = new CompletableFuture<>();
2506 <        f2.completeExceptionally(new CFException());
2507 <        g = f.runAfterEither(f2, r);
2508 <        checkCompletedWithWrappedCFException(g);
2509 <    }
2861 >        checkCompletedWithWrappedCancellationException(h0);
2862 >        checkCompletedWithWrappedCancellationException(h1);
2863 >        checkCompletedWithWrappedCancellationException(h2);
2864 >        checkCompletedWithWrappedCancellationException(h3);
2865 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2866 >    }}
2867  
2868      /**
2869       * runAfterEither result completes exceptionally if action does
2870       */
2871 <    public void testRunAfterEither3() {
2872 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2873 <        CompletableFuture<Integer> f2 = new CompletableFuture<>();
2874 <        FailingNoop r = new FailingNoop();
2875 <        CompletableFuture<Void> g = f.runAfterEither(f2, r);
2876 <        f2.complete(two);
2877 <        checkCompletedWithWrappedCFException(g);
2878 <    }
2871 >    public void testRunAfterEither_actionFailed() {
2872 >        for (ExecutionMode m : ExecutionMode.values())
2873 >        for (Integer v1 : new Integer[] { 1, null })
2874 >        for (Integer v2 : new Integer[] { 2, null })
2875 >    {
2876 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2877 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2878 >        final FailingRunnable[] rs = new FailingRunnable[6];
2879 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
2880  
2881 <    /**
2882 <     * runAfterEither result completes exceptionally if either source cancelled
2883 <     */
2884 <    public void testRunAfterEither4() {
2885 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2886 <        CompletableFuture<Integer> f2 = new CompletableFuture<>();
2887 <        Noop r = new Noop();
2888 <        CompletableFuture<Void> g = f.runAfterEither(f2, r);
2889 <        assertTrue(f.cancel(true));
2890 <        checkCompletedWithWrappedCancellationException(g);
2891 <        f = new CompletableFuture<>();
2892 <        f2 = new CompletableFuture<>();
2893 <        assertTrue(f2.cancel(true));
2894 <        checkCompletedWithWrappedCancellationException(g);
2895 <    }
2881 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2882 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2883 >        assertTrue(f.complete(v1));
2884 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2885 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2886 >        checkCompletedWithWrappedCFException(h0);
2887 >        checkCompletedWithWrappedCFException(h1);
2888 >        checkCompletedWithWrappedCFException(h2);
2889 >        checkCompletedWithWrappedCFException(h3);
2890 >        for (int i = 0; i < 4; i++) rs[i].assertInvoked();
2891 >        assertTrue(g.complete(v2));
2892 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2893 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2894 >        checkCompletedWithWrappedCFException(h4);
2895 >        checkCompletedWithWrappedCFException(h5);
2896 >
2897 >        checkCompletedNormally(f, v1);
2898 >        checkCompletedNormally(g, v2);
2899 >        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2900 >    }}
2901  
2902      /**
2903       * thenCompose result completes normally after normal completion of source
2904       */
2905 <    public void testThenCompose() {
2906 <        CompletableFuture<Integer> f, g;
2907 <        CompletableFutureInc r;
2908 <
2909 <        f = new CompletableFuture<>();
2910 <        g = f.thenCompose(r = new CompletableFutureInc());
2911 <        f.complete(one);
2912 <        checkCompletedNormally(g, two);
2913 <        assertTrue(r.ran);
2905 >    public void testThenCompose_normalCompletion() {
2906 >        for (ExecutionMode m : ExecutionMode.values())
2907 >        for (boolean createIncomplete : new boolean[] { true, false })
2908 >        for (Integer v1 : new Integer[] { 1, null })
2909 >    {
2910 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2911 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2912 >        if (!createIncomplete) assertTrue(f.complete(v1));
2913 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2914 >        if (createIncomplete) assertTrue(f.complete(v1));
2915  
2916 <        f = new CompletableFuture<>();
2917 <        f.complete(one);
2918 <        g = f.thenCompose(r = new CompletableFutureInc());
2919 <        checkCompletedNormally(g, two);
2556 <        assertTrue(r.ran);
2557 <    }
2916 >        checkCompletedNormally(g, inc(v1));
2917 >        checkCompletedNormally(f, v1);
2918 >        r.assertValue(v1);
2919 >    }}
2920  
2921      /**
2922       * thenCompose result completes exceptionally after exceptional
2923       * completion of source
2924       */
2925 <    public void testThenCompose2() {
2926 <        CompletableFuture<Integer> f, g;
2927 <        CompletableFutureInc r;
2928 <
2929 <        f = new CompletableFuture<>();
2930 <        g = f.thenCompose(r = new CompletableFutureInc());
2931 <        f.completeExceptionally(new CFException());
2932 <        checkCompletedWithWrappedCFException(g);
2933 <
2934 <        f = new CompletableFuture<>();
2935 <        f.completeExceptionally(new CFException());
2936 <        g = f.thenCompose(r = new CompletableFutureInc());
2937 <        checkCompletedWithWrappedCFException(g);
2938 <    }
2925 >    public void testThenCompose_exceptionalCompletion() {
2926 >        for (ExecutionMode m : ExecutionMode.values())
2927 >        for (boolean createIncomplete : new boolean[] { true, false })
2928 >    {
2929 >        final CFException ex = new CFException();
2930 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2931 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2932 >        if (!createIncomplete) f.completeExceptionally(ex);
2933 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2934 >        if (createIncomplete) f.completeExceptionally(ex);
2935 >
2936 >        checkCompletedWithWrappedException(g, ex);
2937 >        checkCompletedExceptionally(f, ex);
2938 >        r.assertNotInvoked();
2939 >    }}
2940  
2941      /**
2942       * thenCompose result completes exceptionally if action does
2943       */
2944 <    public void testThenCompose3() {
2945 <        CompletableFuture<Integer> f, g;
2946 <        FailingCompletableFutureFunction r;
2947 <
2948 <        f = new CompletableFuture<>();
2949 <        g = f.thenCompose(r = new FailingCompletableFutureFunction());
2950 <        f.complete(one);
2951 <        checkCompletedWithWrappedCFException(g);
2944 >    public void testThenCompose_actionFailed() {
2945 >        for (ExecutionMode m : ExecutionMode.values())
2946 >        for (boolean createIncomplete : new boolean[] { true, false })
2947 >        for (Integer v1 : new Integer[] { 1, null })
2948 >    {
2949 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2950 >        final FailingCompletableFutureFunction r
2951 >            = new FailingCompletableFutureFunction(m);
2952 >        if (!createIncomplete) assertTrue(f.complete(v1));
2953 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2954 >        if (createIncomplete) assertTrue(f.complete(v1));
2955  
2590        f = new CompletableFuture<>();
2591        f.complete(one);
2592        g = f.thenCompose(r = new FailingCompletableFutureFunction());
2956          checkCompletedWithWrappedCFException(g);
2957 <    }
2957 >        checkCompletedNormally(f, v1);
2958 >    }}
2959  
2960      /**
2961       * thenCompose result completes exceptionally if source cancelled
2962       */
2963 <    public void testThenCompose4() {
2964 <        CompletableFuture<Integer> f, g;
2965 <        CompletableFutureInc r;
2966 <
2967 <        f = new CompletableFuture<>();
2968 <        g = f.thenCompose(r = new CompletableFutureInc());
2969 <        assertTrue(f.cancel(true));
2970 <        checkCompletedWithWrappedCancellationException(g);
2971 <
2972 <        f = new CompletableFuture<>();
2973 <        assertTrue(f.cancel(true));
2974 <        g = f.thenCompose(r = new CompletableFutureInc());
2975 <        checkCompletedWithWrappedCancellationException(g);
2612 <    }
2613 <
2614 <    // asyncs
2615 <
2616 <    /**
2617 <     * thenRunAsync result completes normally after normal completion of source
2618 <     */
2619 <    public void testThenRunAsync() {
2620 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2621 <        Noop r = new Noop();
2622 <        CompletableFuture<Void> g = f.thenRunAsync(r);
2623 <        f.complete(null);
2624 <        checkCompletedNormally(g, null);
2625 <
2626 <        // reordered version
2627 <        f = new CompletableFuture<>();
2628 <        f.complete(null);
2629 <        r = new Noop();
2630 <        g = f.thenRunAsync(r);
2631 <        checkCompletedNormally(g, null);
2632 <    }
2633 <
2634 <    /**
2635 <     * thenRunAsync result completes exceptionally after exceptional
2636 <     * completion of source
2637 <     */
2638 <    public void testThenRunAsync2() {
2639 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2640 <        Noop r = new Noop();
2641 <        CompletableFuture<Void> g = f.thenRunAsync(r);
2642 <        f.completeExceptionally(new CFException());
2643 <        try {
2644 <            g.join();
2645 <            shouldThrow();
2646 <        } catch (CompletionException success) {}
2647 <        checkCompletedWithWrappedCFException(g);
2648 <    }
2649 <
2650 <    /**
2651 <     * thenRunAsync result completes exceptionally if action does
2652 <     */
2653 <    public void testThenRunAsync3() {
2654 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2655 <        FailingNoop r = new FailingNoop();
2656 <        CompletableFuture<Void> g = f.thenRunAsync(r);
2657 <        f.complete(null);
2658 <        checkCompletedWithWrappedCFException(g);
2659 <    }
2660 <
2661 <    /**
2662 <     * thenRunAsync result completes exceptionally if source cancelled
2663 <     */
2664 <    public void testThenRunAsync4() {
2665 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2666 <        Noop r = new Noop();
2667 <        CompletableFuture<Void> g = f.thenRunAsync(r);
2668 <        assertTrue(f.cancel(true));
2669 <        checkCompletedWithWrappedCancellationException(g);
2670 <    }
2671 <
2672 <    /**
2673 <     * thenApplyAsync result completes normally after normal completion of source
2674 <     */
2675 <    public void testThenApplyAsync() {
2676 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2677 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
2678 <        f.complete(one);
2679 <        checkCompletedNormally(g, two);
2680 <    }
2681 <
2682 <    /**
2683 <     * thenApplyAsync result completes exceptionally after exceptional
2684 <     * completion of source
2685 <     */
2686 <    public void testThenApplyAsync2() {
2687 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2688 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
2689 <        f.completeExceptionally(new CFException());
2690 <        checkCompletedWithWrappedCFException(g);
2691 <    }
2692 <
2693 <    /**
2694 <     * thenApplyAsync result completes exceptionally if action does
2695 <     */
2696 <    public void testThenApplyAsync3() {
2697 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2698 <        FailingFunction r = new FailingFunction();
2699 <        CompletableFuture<Integer> g = f.thenApplyAsync(r);
2700 <        f.complete(null);
2701 <        checkCompletedWithWrappedCFException(g);
2702 <    }
2703 <
2704 <    /**
2705 <     * thenApplyAsync result completes exceptionally if source cancelled
2706 <     */
2707 <    public void testThenApplyAsync4() {
2708 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2709 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
2710 <        assertTrue(f.cancel(true));
2711 <        checkCompletedWithWrappedCancellationException(g);
2712 <    }
2713 <
2714 <    /**
2715 <     * thenAcceptAsync result completes normally after normal
2716 <     * completion of source
2717 <     */
2718 <    public void testThenAcceptAsync() {
2719 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2720 <        IncAction r = new IncAction();
2721 <        CompletableFuture<Void> g = f.thenAcceptAsync(r);
2722 <        f.complete(one);
2723 <        checkCompletedNormally(g, null);
2724 <        assertEquals(r.value, (Integer) 2);
2725 <    }
2726 <
2727 <    /**
2728 <     * thenAcceptAsync result completes exceptionally after exceptional
2729 <     * completion of source
2730 <     */
2731 <    public void testThenAcceptAsync2() {
2732 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2733 <        IncAction r = new IncAction();
2734 <        CompletableFuture<Void> g = f.thenAcceptAsync(r);
2735 <        f.completeExceptionally(new CFException());
2736 <        checkCompletedWithWrappedCFException(g);
2737 <    }
2738 <
2739 <    /**
2740 <     * thenAcceptAsync result completes exceptionally if action does
2741 <     */
2742 <    public void testThenAcceptAsync3() {
2743 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2744 <        FailingConsumer r = new FailingConsumer();
2745 <        CompletableFuture<Void> g = f.thenAcceptAsync(r);
2746 <        f.complete(null);
2747 <        checkCompletedWithWrappedCFException(g);
2748 <    }
2749 <
2750 <    /**
2751 <     * thenAcceptAsync result completes exceptionally if source cancelled
2752 <     */
2753 <    public void testThenAcceptAsync4() {
2754 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2755 <        IncAction r = new IncAction();
2756 <        CompletableFuture<Void> g = f.thenAcceptAsync(r);
2757 <        assertTrue(f.cancel(true));
2758 <        checkCompletedWithWrappedCancellationException(g);
2759 <    }
2760 <
2761 <    /**
2762 <     * runAfterEitherAsync result completes normally after normal
2763 <     * completion of sources
2764 <     */
2765 <    public void testRunAfterEitherAsync() {
2766 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2767 <        CompletableFuture<Integer> f2 = new CompletableFuture<>();
2768 <        Noop r = new Noop();
2769 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r);
2770 <        f.complete(one);
2771 <        checkCompletedNormally(g, null);
2772 <        assertTrue(r.ran);
2773 <
2774 <        r = new Noop();
2775 <        f = new CompletableFuture<>();
2776 <        f.complete(one);
2777 <        f2 = new CompletableFuture<>();
2778 <        g = f.runAfterEitherAsync(f2, r);
2779 <        checkCompletedNormally(g, null);
2780 <        assertTrue(r.ran);
2781 <    }
2782 <
2783 <    /**
2784 <     * runAfterEitherAsync result completes exceptionally after exceptional
2785 <     * completion of source
2786 <     */
2787 <    public void testRunAfterEitherAsync2() {
2788 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2789 <        CompletableFuture<Integer> f2 = new CompletableFuture<>();
2790 <        Noop r = new Noop();
2791 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r);
2792 <        f.completeExceptionally(new CFException());
2793 <        checkCompletedWithWrappedCFException(g);
2794 <
2795 <        r = new Noop();
2796 <        f = new CompletableFuture<>();
2797 <        f2 = new CompletableFuture<>();
2798 <        f2.completeExceptionally(new CFException());
2799 <        g = f.runAfterEitherAsync(f2, r);
2800 <        f.complete(one);
2801 <        checkCompletedWithWrappedCFException(g);
2802 <    }
2803 <
2804 <    /**
2805 <     * runAfterEitherAsync result completes exceptionally if action does
2806 <     */
2807 <    public void testRunAfterEitherAsync3() {
2808 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2809 <        CompletableFuture<Integer> f2 = new CompletableFuture<>();
2810 <        FailingNoop r = new FailingNoop();
2811 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r);
2812 <        f.complete(one);
2813 <        checkCompletedWithWrappedCFException(g);
2814 <    }
2815 <
2816 <    /**
2817 <     * runAfterEitherAsync result completes exceptionally if either
2818 <     * source cancelled
2819 <     */
2820 <    public void testRunAfterEitherAsync4() {
2821 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2822 <        CompletableFuture<Integer> f2 = new CompletableFuture<>();
2823 <        Noop r = new Noop();
2824 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r);
2825 <        assertTrue(f.cancel(true));
2826 <        checkCompletedWithWrappedCancellationException(g);
2827 <
2828 <        r = new Noop();
2829 <        f = new CompletableFuture<>();
2830 <        f2 = new CompletableFuture<>();
2831 <        assertTrue(f2.cancel(true));
2832 <        g = f.runAfterEitherAsync(f2, r);
2833 <        checkCompletedWithWrappedCancellationException(g);
2834 <    }
2835 <
2836 <    /**
2837 <     * thenComposeAsync result completes normally after normal
2838 <     * completion of source
2839 <     */
2840 <    public void testThenComposeAsync() {
2841 <        CompletableFuture<Integer> f, g;
2842 <        CompletableFutureInc r;
2843 <
2844 <        f = new CompletableFuture<>();
2845 <        g = f.thenComposeAsync(r = new CompletableFutureInc());
2846 <        f.complete(one);
2847 <        checkCompletedNormally(g, two);
2848 <
2849 <        f = new CompletableFuture<>();
2850 <        f.complete(one);
2851 <        g = f.thenComposeAsync(r = new CompletableFutureInc());
2852 <        checkCompletedNormally(g, two);
2853 <    }
2854 <
2855 <    /**
2856 <     * thenComposeAsync result completes exceptionally after
2857 <     * exceptional completion of source
2858 <     */
2859 <    public void testThenComposeAsync2() {
2860 <        CompletableFuture<Integer> f, g;
2861 <        CompletableFutureInc r;
2862 <
2863 <        f = new CompletableFuture<>();
2864 <        g = f.thenComposeAsync(r = new CompletableFutureInc());
2865 <        f.completeExceptionally(new CFException());
2866 <        checkCompletedWithWrappedCFException(g);
2867 <        assertFalse(r.ran);
2868 <
2869 <        f = new CompletableFuture<>();
2870 <        f.completeExceptionally(new CFException());
2871 <        g = f.thenComposeAsync(r = new CompletableFutureInc());
2872 <        checkCompletedWithWrappedCFException(g);
2873 <        assertFalse(r.ran);
2874 <    }
2875 <
2876 <    /**
2877 <     * thenComposeAsync result completes exceptionally if action does
2878 <     */
2879 <    public void testThenComposeAsync3() {
2880 <        CompletableFuture<Integer> f, g;
2881 <        FailingCompletableFutureFunction r;
2882 <
2883 <        f = new CompletableFuture<>();
2884 <        g = f.thenComposeAsync(r = new FailingCompletableFutureFunction());
2885 <        f.complete(one);
2886 <        checkCompletedWithWrappedCFException(g);
2887 <
2888 <        f = new CompletableFuture<>();
2889 <        f.complete(one);
2890 <        g = f.thenComposeAsync(r = new FailingCompletableFutureFunction());
2891 <        checkCompletedWithWrappedCFException(g);
2892 <    }
2893 <
2894 <    /**
2895 <     * thenComposeAsync result completes exceptionally if source cancelled
2896 <     */
2897 <    public void testThenComposeAsync4() {
2898 <        CompletableFuture<Integer> f, g;
2899 <        CompletableFutureInc r;
2900 <
2901 <        f = new CompletableFuture<>();
2902 <        g = f.thenComposeAsync(r = new CompletableFutureInc());
2903 <        assertTrue(f.cancel(true));
2904 <        checkCompletedWithWrappedCancellationException(g);
2905 <
2906 <        f = new CompletableFuture<>();
2907 <        assertTrue(f.cancel(true));
2908 <        g = f.thenComposeAsync(r = new CompletableFutureInc());
2909 <        checkCompletedWithWrappedCancellationException(g);
2910 <    }
2911 <
2912 <    // async with explicit executors
2913 <
2914 <    /**
2915 <     * thenRunAsync result completes normally after normal completion of source
2916 <     */
2917 <    public void testThenRunAsyncE() {
2918 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2919 <        Noop r = new Noop();
2920 <        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
2921 <        f.complete(null);
2922 <        checkCompletedNormally(g, null);
2923 <
2924 <        // reordered version
2925 <        f = new CompletableFuture<>();
2926 <        f.complete(null);
2927 <        r = new Noop();
2928 <        g = f.thenRunAsync(r, new ThreadExecutor());
2929 <        checkCompletedNormally(g, null);
2930 <    }
2931 <
2932 <    /**
2933 <     * thenRunAsync result completes exceptionally after exceptional
2934 <     * completion of source
2935 <     */
2936 <    public void testThenRunAsync2E() {
2937 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2938 <        Noop r = new Noop();
2939 <        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
2940 <        f.completeExceptionally(new CFException());
2941 <        try {
2942 <            g.join();
2943 <            shouldThrow();
2944 <        } catch (CompletionException success) {}
2945 <        checkCompletedWithWrappedCFException(g);
2946 <    }
2947 <
2948 <    /**
2949 <     * thenRunAsync result completes exceptionally if action does
2950 <     */
2951 <    public void testThenRunAsync3E() {
2952 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2953 <        FailingNoop r = new FailingNoop();
2954 <        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
2955 <        f.complete(null);
2956 <        checkCompletedWithWrappedCFException(g);
2957 <    }
2958 <
2959 <    /**
2960 <     * thenRunAsync result completes exceptionally if source cancelled
2961 <     */
2962 <    public void testThenRunAsync4E() {
2963 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2964 <        Noop r = new Noop();
2965 <        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
2966 <        assertTrue(f.cancel(true));
2967 <        checkCompletedWithWrappedCancellationException(g);
2968 <    }
2969 <
2970 <    /**
2971 <     * thenApplyAsync result completes normally after normal completion of source
2972 <     */
2973 <    public void testThenApplyAsyncE() {
2974 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2975 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
2976 <        f.complete(one);
2977 <        checkCompletedNormally(g, two);
2978 <    }
2979 <
2980 <    /**
2981 <     * thenApplyAsync result completes exceptionally after exceptional
2982 <     * completion of source
2983 <     */
2984 <    public void testThenApplyAsync2E() {
2985 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2986 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
2987 <        f.completeExceptionally(new CFException());
2988 <        checkCompletedWithWrappedCFException(g);
2989 <    }
2990 <
2991 <    /**
2992 <     * thenApplyAsync result completes exceptionally if action does
2993 <     */
2994 <    public void testThenApplyAsync3E() {
2995 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2996 <        FailingFunction r = new FailingFunction();
2997 <        CompletableFuture<Integer> g = f.thenApplyAsync(r, new ThreadExecutor());
2998 <        f.complete(null);
2999 <        checkCompletedWithWrappedCFException(g);
3000 <    }
3001 <
3002 <    /**
3003 <     * thenApplyAsync result completes exceptionally if source cancelled
3004 <     */
3005 <    public void testThenApplyAsync4E() {
3006 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3007 <        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
3008 <        assertTrue(f.cancel(true));
3009 <        checkCompletedWithWrappedCancellationException(g);
3010 <    }
3011 <
3012 <    /**
3013 <     * thenAcceptAsync result completes normally after normal
3014 <     * completion of source
3015 <     */
3016 <    public void testThenAcceptAsyncE() {
3017 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3018 <        IncAction r = new IncAction();
3019 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3020 <        f.complete(one);
3021 <        checkCompletedNormally(g, null);
3022 <        assertEquals(r.value, (Integer) 2);
3023 <    }
3024 <
3025 <    /**
3026 <     * thenAcceptAsync result completes exceptionally after exceptional
3027 <     * completion of source
3028 <     */
3029 <    public void testThenAcceptAsync2E() {
3030 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3031 <        IncAction r = new IncAction();
3032 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3033 <        f.completeExceptionally(new CFException());
3034 <        checkCompletedWithWrappedCFException(g);
3035 <    }
3036 <
3037 <    /**
3038 <     * thenAcceptAsync result completes exceptionally if action does
3039 <     */
3040 <    public void testThenAcceptAsync3E() {
3041 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3042 <        FailingConsumer r = new FailingConsumer();
3043 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3044 <        f.complete(null);
3045 <        checkCompletedWithWrappedCFException(g);
3046 <    }
3047 <
3048 <    /**
3049 <     * thenAcceptAsync result completes exceptionally if source cancelled
3050 <     */
3051 <    public void testThenAcceptAsync4E() {
3052 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3053 <        IncAction r = new IncAction();
3054 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3055 <        assertTrue(f.cancel(true));
3056 <        checkCompletedWithWrappedCancellationException(g);
3057 <    }
3058 <
3059 <    /**
3060 <     * runAfterEitherAsync result completes normally after normal
3061 <     * completion of sources
3062 <     */
3063 <    public void testRunAfterEitherAsyncE() {
3064 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3065 <        CompletableFuture<Integer> f2 = new CompletableFuture<>();
3066 <        Noop r = new Noop();
3067 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
3068 <        f.complete(one);
3069 <        checkCompletedNormally(g, null);
3070 <        assertTrue(r.ran);
3071 <
3072 <        r = new Noop();
3073 <        f = new CompletableFuture<>();
3074 <        f.complete(one);
3075 <        f2 = new CompletableFuture<>();
3076 <        g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
3077 <        checkCompletedNormally(g, null);
3078 <        assertTrue(r.ran);
3079 <    }
3080 <
3081 <    /**
3082 <     * runAfterEitherAsync result completes exceptionally after exceptional
3083 <     * completion of source
3084 <     */
3085 <    public void testRunAfterEitherAsync2E() {
3086 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3087 <        CompletableFuture<Integer> f2 = new CompletableFuture<>();
3088 <        Noop r = new Noop();
3089 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
3090 <        f.completeExceptionally(new CFException());
3091 <        checkCompletedWithWrappedCFException(g);
3092 <
3093 <        r = new Noop();
3094 <        f = new CompletableFuture<>();
3095 <        f2 = new CompletableFuture<>();
3096 <        f2.completeExceptionally(new CFException());
3097 <        g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
3098 <        f.complete(one);
3099 <        checkCompletedWithWrappedCFException(g);
3100 <    }
3101 <
3102 <    /**
3103 <     * runAfterEitherAsync result completes exceptionally if action does
3104 <     */
3105 <    public void testRunAfterEitherAsync3E() {
3106 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3107 <        CompletableFuture<Integer> f2 = new CompletableFuture<>();
3108 <        FailingNoop r = new FailingNoop();
3109 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
3110 <        f.complete(one);
3111 <        checkCompletedWithWrappedCFException(g);
3112 <    }
3113 <
3114 <    /**
3115 <     * runAfterEitherAsync result completes exceptionally if either
3116 <     * source cancelled
3117 <     */
3118 <    public void testRunAfterEitherAsync4E() {
3119 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3120 <        CompletableFuture<Integer> f2 = new CompletableFuture<>();
3121 <        Noop r = new Noop();
3122 <        CompletableFuture<Void> g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
3123 <        assertTrue(f.cancel(true));
3124 <        checkCompletedWithWrappedCancellationException(g);
2963 >    public void testThenCompose_sourceCancelled() {
2964 >        for (ExecutionMode m : ExecutionMode.values())
2965 >        for (boolean createIncomplete : new boolean[] { true, false })
2966 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2967 >    {
2968 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2969 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2970 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
2971 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2972 >        if (createIncomplete) {
2973 >            checkIncomplete(g);
2974 >            assertTrue(f.cancel(mayInterruptIfRunning));
2975 >        }
2976  
3126        r = new Noop();
3127        f = new CompletableFuture<>();
3128        f2 = new CompletableFuture<>();
3129        assertTrue(f2.cancel(true));
3130        g = f.runAfterEitherAsync(f2, r, new ThreadExecutor());
2977          checkCompletedWithWrappedCancellationException(g);
2978 <    }
2979 <
3134 <    /**
3135 <     * thenComposeAsync result completes normally after normal
3136 <     * completion of source
3137 <     */
3138 <    public void testThenComposeAsyncE() {
3139 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3140 <        CompletableFutureInc r = new CompletableFutureInc();
3141 <        CompletableFuture<Integer> g = f.thenComposeAsync(r, new ThreadExecutor());
3142 <        f.complete(one);
3143 <        checkCompletedNormally(g, two);
3144 <    }
3145 <
3146 <    /**
3147 <     * thenComposeAsync result completes exceptionally after
3148 <     * exceptional completion of source
3149 <     */
3150 <    public void testThenComposeAsync2E() {
3151 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3152 <        CompletableFutureInc r = new CompletableFutureInc();
3153 <        CompletableFuture<Integer> g = f.thenComposeAsync(r, new ThreadExecutor());
3154 <        f.completeExceptionally(new CFException());
3155 <        checkCompletedWithWrappedCFException(g);
3156 <    }
2978 >        checkCancelled(f);
2979 >    }}
2980  
2981      /**
2982 <     * thenComposeAsync result completes exceptionally if action does
2982 >     * thenCompose result completes exceptionally if the result of the action does
2983       */
2984 <    public void testThenComposeAsync3E() {
2985 <        CompletableFuture<Integer> f = new CompletableFuture<>();
2986 <        FailingCompletableFutureFunction r = new FailingCompletableFutureFunction();
2987 <        CompletableFuture<Integer> g = f.thenComposeAsync(r, new ThreadExecutor());
2988 <        f.complete(one);
2989 <        checkCompletedWithWrappedCFException(g);
2990 <    }
2984 >    public void testThenCompose_actionReturnsFailingFuture() {
2985 >        for (ExecutionMode m : ExecutionMode.values())
2986 >        for (int order = 0; order < 6; order++)
2987 >        for (Integer v1 : new Integer[] { 1, null })
2988 >    {
2989 >        final CFException ex = new CFException();
2990 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
2991 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2992 >        final CompletableFuture<Integer> h;
2993 >        // Test all permutations of orders
2994 >        switch (order) {
2995 >        case 0:
2996 >            assertTrue(f.complete(v1));
2997 >            assertTrue(g.completeExceptionally(ex));
2998 >            h = m.thenCompose(f, (x -> g));
2999 >            break;
3000 >        case 1:
3001 >            assertTrue(f.complete(v1));
3002 >            h = m.thenCompose(f, (x -> g));
3003 >            assertTrue(g.completeExceptionally(ex));
3004 >            break;
3005 >        case 2:
3006 >            assertTrue(g.completeExceptionally(ex));
3007 >            assertTrue(f.complete(v1));
3008 >            h = m.thenCompose(f, (x -> g));
3009 >            break;
3010 >        case 3:
3011 >            assertTrue(g.completeExceptionally(ex));
3012 >            h = m.thenCompose(f, (x -> g));
3013 >            assertTrue(f.complete(v1));
3014 >            break;
3015 >        case 4:
3016 >            h = m.thenCompose(f, (x -> g));
3017 >            assertTrue(f.complete(v1));
3018 >            assertTrue(g.completeExceptionally(ex));
3019 >            break;
3020 >        case 5:
3021 >            h = m.thenCompose(f, (x -> g));
3022 >            assertTrue(f.complete(v1));
3023 >            assertTrue(g.completeExceptionally(ex));
3024 >            break;
3025 >        default: throw new AssertionError();
3026 >        }
3027  
3028 <    /**
3029 <     * thenComposeAsync result completes exceptionally if source cancelled
3030 <     */
3031 <    public void testThenComposeAsync4E() {
3173 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3174 <        CompletableFutureInc r = new CompletableFutureInc();
3175 <        CompletableFuture<Integer> g = f.thenComposeAsync(r, new ThreadExecutor());
3176 <        assertTrue(f.cancel(true));
3177 <        checkCompletedWithWrappedCancellationException(g);
3178 <    }
3028 >        checkCompletedExceptionally(g, ex);
3029 >        checkCompletedWithWrappedException(h, ex);
3030 >        checkCompletedNormally(f, v1);
3031 >    }}
3032  
3033      // other static methods
3034  
# Line 3193 | Line 3046 | public class CompletableFutureTest exten
3046       * when all components complete normally
3047       */
3048      public void testAllOf_normal() throws Exception {
3049 <        for (int k = 1; k < 20; ++k) {
3050 <            CompletableFuture<Integer>[] fs = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3051 <            for (int i = 0; i < k; ++i)
3049 >        for (int k = 1; k < 10; k++) {
3050 >            CompletableFuture<Integer>[] fs
3051 >                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3052 >            for (int i = 0; i < k; i++)
3053                  fs[i] = new CompletableFuture<>();
3054              CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3055 <            for (int i = 0; i < k; ++i) {
3055 >            for (int i = 0; i < k; i++) {
3056                  checkIncomplete(f);
3057                  checkIncomplete(CompletableFuture.allOf(fs));
3058                  fs[i].complete(one);
# Line 3208 | Line 3062 | public class CompletableFutureTest exten
3062          }
3063      }
3064  
3065 +    public void testAllOf_backwards() throws Exception {
3066 +        for (int k = 1; k < 10; k++) {
3067 +            CompletableFuture<Integer>[] fs
3068 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3069 +            for (int i = 0; i < k; i++)
3070 +                fs[i] = new CompletableFuture<>();
3071 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3072 +            for (int i = k - 1; i >= 0; i--) {
3073 +                checkIncomplete(f);
3074 +                checkIncomplete(CompletableFuture.allOf(fs));
3075 +                fs[i].complete(one);
3076 +            }
3077 +            checkCompletedNormally(f, null);
3078 +            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3079 +        }
3080 +    }
3081 +
3082 +    public void testAllOf_exceptional() throws Exception {
3083 +        for (int k = 1; k < 10; k++) {
3084 +            CompletableFuture<Integer>[] fs
3085 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3086 +            CFException ex = new CFException();
3087 +            for (int i = 0; i < k; i++)
3088 +                fs[i] = new CompletableFuture<>();
3089 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3090 +            for (int i = 0; i < k; i++) {
3091 +                checkIncomplete(f);
3092 +                checkIncomplete(CompletableFuture.allOf(fs));
3093 +                if (i != k / 2) {
3094 +                    fs[i].complete(i);
3095 +                    checkCompletedNormally(fs[i], i);
3096 +                } else {
3097 +                    fs[i].completeExceptionally(ex);
3098 +                    checkCompletedExceptionally(fs[i], ex);
3099 +                }
3100 +            }
3101 +            checkCompletedWithWrappedException(f, ex);
3102 +            checkCompletedWithWrappedException(CompletableFuture.allOf(fs), ex);
3103 +        }
3104 +    }
3105 +
3106      /**
3107       * anyOf(no component futures) returns an incomplete future
3108       */
3109      public void testAnyOf_empty() throws Exception {
3110 +        for (Integer v1 : new Integer[] { 1, null })
3111 +    {
3112          CompletableFuture<Object> f = CompletableFuture.anyOf();
3113          checkIncomplete(f);
3114 <    }
3114 >
3115 >        f.complete(v1);
3116 >        checkCompletedNormally(f, v1);
3117 >    }}
3118  
3119      /**
3120       * anyOf returns a future completed normally with a value when
3121       * a component future does
3122       */
3123      public void testAnyOf_normal() throws Exception {
3124 <        for (int k = 0; k < 10; ++k) {
3124 >        for (int k = 0; k < 10; k++) {
3125              CompletableFuture[] fs = new CompletableFuture[k];
3126 <            for (int i = 0; i < k; ++i)
3126 >            for (int i = 0; i < k; i++)
3127                  fs[i] = new CompletableFuture<>();
3128              CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3129              checkIncomplete(f);
3130 <            for (int i = 0; i < k; ++i) {
3131 <                fs[i].complete(one);
3132 <                checkCompletedNormally(f, one);
3133 <                checkCompletedNormally(CompletableFuture.anyOf(fs), one);
3130 >            for (int i = 0; i < k; i++) {
3131 >                fs[i].complete(i);
3132 >                checkCompletedNormally(f, 0);
3133 >                int x = (int) CompletableFuture.anyOf(fs).join();
3134 >                assertTrue(0 <= x && x <= i);
3135 >            }
3136 >        }
3137 >    }
3138 >    public void testAnyOf_normal_backwards() throws Exception {
3139 >        for (int k = 0; k < 10; k++) {
3140 >            CompletableFuture[] fs = new CompletableFuture[k];
3141 >            for (int i = 0; i < k; i++)
3142 >                fs[i] = new CompletableFuture<>();
3143 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3144 >            checkIncomplete(f);
3145 >            for (int i = k - 1; i >= 0; i--) {
3146 >                fs[i].complete(i);
3147 >                checkCompletedNormally(f, k - 1);
3148 >                int x = (int) CompletableFuture.anyOf(fs).join();
3149 >                assertTrue(i <= x && x <= k - 1);
3150              }
3151          }
3152      }
# Line 3239 | Line 3155 | public class CompletableFutureTest exten
3155       * anyOf result completes exceptionally when any component does.
3156       */
3157      public void testAnyOf_exceptional() throws Exception {
3158 <        for (int k = 0; k < 10; ++k) {
3158 >        for (int k = 0; k < 10; k++) {
3159 >            CompletableFuture[] fs = new CompletableFuture[k];
3160 >            CFException[] exs = new CFException[k];
3161 >            for (int i = 0; i < k; i++) {
3162 >                fs[i] = new CompletableFuture<>();
3163 >                exs[i] = new CFException();
3164 >            }
3165 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3166 >            checkIncomplete(f);
3167 >            for (int i = 0; i < k; i++) {
3168 >                fs[i].completeExceptionally(exs[i]);
3169 >                checkCompletedWithWrappedException(f, exs[0]);
3170 >                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3171 >            }
3172 >        }
3173 >    }
3174 >
3175 >    public void testAnyOf_exceptional_backwards() throws Exception {
3176 >        for (int k = 0; k < 10; k++) {
3177              CompletableFuture[] fs = new CompletableFuture[k];
3178 <            for (int i = 0; i < k; ++i)
3178 >            CFException[] exs = new CFException[k];
3179 >            for (int i = 0; i < k; i++) {
3180                  fs[i] = new CompletableFuture<>();
3181 +                exs[i] = new CFException();
3182 +            }
3183              CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3184              checkIncomplete(f);
3185 <            for (int i = 0; i < k; ++i) {
3186 <                fs[i].completeExceptionally(new CFException());
3187 <                checkCompletedWithWrappedCFException(f);
3185 >            for (int i = k - 1; i >= 0; i--) {
3186 >                fs[i].completeExceptionally(exs[i]);
3187 >                checkCompletedWithWrappedException(f, exs[k - 1]);
3188                  checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3189              }
3190          }
# Line 3260 | Line 3197 | public class CompletableFutureTest exten
3197          CompletableFuture<Integer> f = new CompletableFuture<>();
3198          CompletableFuture<Integer> g = new CompletableFuture<>();
3199          CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
3263        CompletableFuture<?> h;
3200          ThreadExecutor exec = new ThreadExecutor();
3201  
3202          Runnable[] throwingActions = {
3203              () -> CompletableFuture.supplyAsync(null),
3204              () -> CompletableFuture.supplyAsync(null, exec),
3205 <            () -> CompletableFuture.supplyAsync(supplyOne, null),
3205 >            () -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.SYNC, 42), null),
3206  
3207              () -> CompletableFuture.runAsync(null),
3208              () -> CompletableFuture.runAsync(null, exec),
# Line 3339 | Line 3275 | public class CompletableFutureTest exten
3275  
3276              () -> f.thenCompose(null),
3277              () -> f.thenComposeAsync(null),
3278 <            () -> f.thenComposeAsync(new CompletableFutureInc(), null),
3278 >            () -> f.thenComposeAsync(new CompletableFutureInc(ExecutionMode.EXECUTOR), null),
3279              () -> f.thenComposeAsync(null, exec),
3280  
3281              () -> f.exceptionally(null),
# Line 3357 | Line 3293 | public class CompletableFutureTest exten
3293              () -> CompletableFuture.anyOf(null, f),
3294  
3295              () -> f.obtrudeException(null),
3296 +
3297 +            () -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3298 +            () -> CompletableFuture.delayedExecutor(1L, null, exec),
3299 +            () -> CompletableFuture.delayedExecutor(1L, null),
3300 +
3301 +            () -> f.orTimeout(1L, null),
3302 +            () -> f.completeOnTimeout(42, 1L, null),
3303 +
3304 +            () -> CompletableFuture.failedFuture(null),
3305 +            () -> CompletableFuture.failedStage(null),
3306          };
3307  
3308          assertThrows(NullPointerException.class, throwingActions);
# Line 3371 | Line 3317 | public class CompletableFutureTest exten
3317          assertSame(f, f.toCompletableFuture());
3318      }
3319  
3320 +    // jdk9
3321 +
3322      /**
3323 <     * whenComplete action executes on normal completion, propagating
3376 <     * source result.
3323 >     * newIncompleteFuture returns an incomplete CompletableFuture
3324       */
3325 <    public void testWhenComplete1() {
3326 <        final AtomicInteger a = new AtomicInteger();
3325 >    public void testNewIncompleteFuture() {
3326 >        for (Integer v1 : new Integer[] { 1, null })
3327 >    {
3328          CompletableFuture<Integer> f = new CompletableFuture<>();
3329 <        CompletableFuture<Integer> g =
3330 <            f.whenComplete((Integer x, Throwable t) -> a.getAndIncrement());
3331 <        f.complete(three);
3332 <        checkCompletedNormally(f, three);
3333 <        checkCompletedNormally(g, three);
3334 <        assertEquals(a.get(), 1);
3329 >        CompletableFuture<Integer> g = f.newIncompleteFuture();
3330 >        checkIncomplete(f);
3331 >        checkIncomplete(g);
3332 >        f.complete(v1);
3333 >        checkCompletedNormally(f, v1);
3334 >        checkIncomplete(g);
3335 >        g.complete(v1);
3336 >        checkCompletedNormally(g, v1);
3337 >        assertSame(g.getClass(), CompletableFuture.class);
3338 >    }}
3339 >
3340 >    /**
3341 >     * completedStage returns a completed CompletionStage
3342 >     */
3343 >    public void testCompletedStage() {
3344 >        AtomicInteger x = new AtomicInteger(0);
3345 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3346 >        CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3347 >        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3348 >        assertEquals(x.get(), 1);
3349 >        assertNull(r.get());
3350      }
3351  
3352      /**
3353 <     * whenComplete action executes on exceptional completion, propagating
3354 <     * source result.
3353 >     * defaultExecutor by default returns the commonPool if
3354 >     * it supports more than one thread.
3355       */
3356 <    public void testWhenComplete2() {
3394 <        final AtomicInteger a = new AtomicInteger();
3356 >    public void testDefaultExecutor() {
3357          CompletableFuture<Integer> f = new CompletableFuture<>();
3358 <        CompletableFuture<Integer> g =
3359 <            f.whenComplete((Integer x, Throwable t) -> a.getAndIncrement());
3360 <        f.completeExceptionally(new CFException());
3361 <        assertTrue(f.isCompletedExceptionally());
3362 <        assertTrue(g.isCompletedExceptionally());
3363 <        assertEquals(a.get(), 1);
3358 >        Executor e = f.defaultExecutor();
3359 >        Executor c = ForkJoinPool.commonPool();
3360 >        if (ForkJoinPool.getCommonPoolParallelism() > 1)
3361 >            assertSame(e, c);
3362 >        else
3363 >            assertNotSame(e, c);
3364      }
3365  
3366      /**
3367 <     * If a whenComplete action throws an exception when triggered by
3368 <     * a normal completion, it completes exceptionally
3367 >     * failedFuture returns a CompletableFuture completed
3368 >     * exceptionally with the given Exception
3369       */
3370 <    public void testWhenComplete3() {
3371 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3372 <        CompletableFuture<Integer> g =
3373 <            f.whenComplete((Integer x, Throwable t) ->
3412 <                           { throw new CFException(); } );
3413 <        f.complete(three);
3414 <        checkCompletedNormally(f, three);
3415 <        assertTrue(g.isCompletedExceptionally());
3416 <        checkCompletedWithWrappedCFException(g);
3370 >    public void testFailedFuture() {
3371 >        CFException ex = new CFException();
3372 >        CompletableFuture<Integer> f = CompletableFuture.failedFuture(ex);
3373 >        checkCompletedExceptionally(f, ex);
3374      }
3375  
3376      /**
3377 <     * whenCompleteAsync action executes on normal completion, propagating
3421 <     * source result.
3377 >     * failedFuture(null) throws NPE
3378       */
3379 <    public void testWhenCompleteAsync1() {
3380 <        final AtomicInteger a = new AtomicInteger();
3381 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3382 <        CompletableFuture<Integer> g =
3383 <            f.whenCompleteAsync((Integer x, Throwable t) -> a.getAndIncrement());
3428 <        f.complete(three);
3429 <        checkCompletedNormally(f, three);
3430 <        checkCompletedNormally(g, three);
3431 <        assertEquals(a.get(), 1);
3379 >    public void testFailedFuture_null() {
3380 >        try {
3381 >            CompletableFuture<Integer> f = CompletableFuture.failedFuture(null);
3382 >            shouldThrow();
3383 >        } catch (NullPointerException success) {}
3384      }
3385  
3386      /**
3387 <     * whenCompleteAsync action executes on exceptional completion, propagating
3388 <     * source result.
3387 >     * copy returns a CompletableFuture that is completed normally,
3388 >     * with the same value, when source is.
3389       */
3390 <    public void testWhenCompleteAsync2() {
3439 <        final AtomicInteger a = new AtomicInteger();
3390 >    public void testCopy() {
3391          CompletableFuture<Integer> f = new CompletableFuture<>();
3392 <        CompletableFuture<Integer> g =
3393 <            f.whenCompleteAsync((Integer x, Throwable t) -> a.getAndIncrement());
3394 <        f.completeExceptionally(new CFException());
3395 <        checkCompletedWithWrappedCFException(f);
3396 <        checkCompletedWithWrappedCFException(g);
3392 >        CompletableFuture<Integer> g = f.copy();
3393 >        checkIncomplete(f);
3394 >        checkIncomplete(g);
3395 >        f.complete(1);
3396 >        checkCompletedNormally(f, 1);
3397 >        checkCompletedNormally(g, 1);
3398      }
3399  
3400      /**
3401 <     * If a whenCompleteAsync action throws an exception when
3402 <     * triggered by a normal completion, it completes exceptionally
3401 >     * copy returns a CompletableFuture that is completed exceptionally
3402 >     * when source is.
3403       */
3404 <    public void testWhenCompleteAsync3() {
3404 >    public void testCopy2() {
3405          CompletableFuture<Integer> f = new CompletableFuture<>();
3406 <        CompletableFuture<Integer> g =
3407 <            f.whenCompleteAsync((Integer x, Throwable t) ->
3408 <                           { throw new CFException(); } );
3409 <        f.complete(three);
3410 <        checkCompletedNormally(f, three);
3411 <        checkCompletedWithWrappedCFException(g);
3406 >        CompletableFuture<Integer> g = f.copy();
3407 >        checkIncomplete(f);
3408 >        checkIncomplete(g);
3409 >        CFException ex = new CFException();
3410 >        f.completeExceptionally(ex);
3411 >        checkCompletedExceptionally(f, ex);
3412 >        checkCompletedWithWrappedException(g, ex);
3413      }
3414  
3415      /**
3416 <     * whenCompleteAsync action executes on normal completion, propagating
3417 <     * source result.
3416 >     * minimalCompletionStage returns a CompletableFuture that is
3417 >     * completed normally, with the same value, when source is.
3418       */
3419 <    public void testWhenCompleteAsync1e() {
3467 <        final AtomicInteger a = new AtomicInteger();
3468 <        ThreadExecutor exec = new ThreadExecutor();
3419 >    public void testMinimalCompletionStage() {
3420          CompletableFuture<Integer> f = new CompletableFuture<>();
3421 <        CompletableFuture<Integer> g =
3422 <            f.whenCompleteAsync((Integer x, Throwable t) -> a.getAndIncrement(),
3423 <                                exec);
3424 <        f.complete(three);
3425 <        checkCompletedNormally(f, three);
3426 <        checkCompletedNormally(g, three);
3427 <        assertEquals(a.get(), 1);
3421 >        CompletionStage<Integer> g = f.minimalCompletionStage();
3422 >        AtomicInteger x = new AtomicInteger(0);
3423 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3424 >        checkIncomplete(f);
3425 >        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3426 >        f.complete(1);
3427 >        checkCompletedNormally(f, 1);
3428 >        assertEquals(x.get(), 1);
3429 >        assertNull(r.get());
3430      }
3431  
3432      /**
3433 <     * whenCompleteAsync action executes on exceptional completion, propagating
3434 <     * source result.
3433 >     * minimalCompletionStage returns a CompletableFuture that is
3434 >     * completed exceptionally when source is.
3435       */
3436 <    public void testWhenCompleteAsync2e() {
3484 <        final AtomicInteger a = new AtomicInteger();
3485 <        ThreadExecutor exec = new ThreadExecutor();
3436 >    public void testMinimalCompletionStage2() {
3437          CompletableFuture<Integer> f = new CompletableFuture<>();
3438 <        CompletableFuture<Integer> g =
3439 <            f.whenCompleteAsync((Integer x, Throwable t) -> a.getAndIncrement(),
3440 <                                exec);
3441 <        f.completeExceptionally(new CFException());
3442 <        checkCompletedWithWrappedCFException(f);
3443 <        checkCompletedWithWrappedCFException(g);
3438 >        CompletionStage<Integer> g = f.minimalCompletionStage();
3439 >        AtomicInteger x = new AtomicInteger(0);
3440 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3441 >        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3442 >        checkIncomplete(f);
3443 >        CFException ex = new CFException();
3444 >        f.completeExceptionally(ex);
3445 >        checkCompletedExceptionally(f, ex);
3446 >        assertEquals(x.get(), 0);
3447 >        assertEquals(r.get().getCause(), ex);
3448      }
3449  
3450      /**
3451 <     * If a whenCompleteAsync action throws an exception when triggered
3452 <     * by a normal completion, it completes exceptionally
3451 >     * failedStage returns a CompletionStage completed
3452 >     * exceptionally with the given Exception
3453       */
3454 <    public void testWhenCompleteAsync3e() {
3455 <        ThreadExecutor exec = new ThreadExecutor();
3454 >    public void testFailedStage() {
3455 >        CFException ex = new CFException();
3456 >        CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3457 >        AtomicInteger x = new AtomicInteger(0);
3458 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3459 >        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3460 >        assertEquals(x.get(), 0);
3461 >        assertEquals(r.get(), ex);
3462 >    }
3463 >
3464 >    /**
3465 >     * completeAsync completes with value of given supplier
3466 >     */
3467 >    public void testCompleteAsync() {
3468 >        for (Integer v1 : new Integer[] { 1, null })
3469 >    {
3470          CompletableFuture<Integer> f = new CompletableFuture<>();
3471 <        CompletableFuture<Integer> g =
3472 <            f.whenCompleteAsync((Integer x, Throwable t) ->
3473 <                                { throw new CFException(); },
3474 <                                exec);
3475 <        f.complete(three);
3476 <        checkCompletedNormally(f, three);
3477 <        checkCompletedWithWrappedCFException(g);
3471 >        f.completeAsync(() -> v1);
3472 >        f.join();
3473 >        checkCompletedNormally(f, v1);
3474 >    }}
3475 >
3476 >    /**
3477 >     * completeAsync completes exceptionally if given supplier throws
3478 >     */
3479 >    public void testCompleteAsync2() {
3480 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3481 >        CFException ex = new CFException();
3482 >        f.completeAsync(() -> {if (true) throw ex; return 1;});
3483 >        try {
3484 >            f.join();
3485 >            shouldThrow();
3486 >        } catch (CompletionException success) {}
3487 >        checkCompletedWithWrappedException(f, ex);
3488      }
3489  
3490      /**
3491 <     * handleAsync action completes normally with function value on
3513 <     * either normal or exceptional completion of source
3491 >     * completeAsync with given executor completes with value of given supplier
3492       */
3493 <    public void testHandleAsync() {
3494 <        CompletableFuture<Integer> f, g;
3495 <        IntegerHandler r;
3493 >    public void testCompleteAsync3() {
3494 >        for (Integer v1 : new Integer[] { 1, null })
3495 >    {
3496 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3497 >        ThreadExecutor executor = new ThreadExecutor();
3498 >        f.completeAsync(() -> v1, executor);
3499 >        assertSame(v1, f.join());
3500 >        checkCompletedNormally(f, v1);
3501 >        assertEquals(1, executor.count.get());
3502 >    }}
3503  
3504 <        f = new CompletableFuture<>();
3505 <        g = f.handleAsync(r = new IntegerHandler());
3506 <        assertFalse(r.ran);
3507 <        f.completeExceptionally(new CFException());
3508 <        checkCompletedWithWrappedCFException(f);
3509 <        checkCompletedNormally(g, three);
3510 <        assertTrue(r.ran);
3504 >    /**
3505 >     * completeAsync with given executor completes exceptionally if
3506 >     * given supplier throws
3507 >     */
3508 >    public void testCompleteAsync4() {
3509 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3510 >        CFException ex = new CFException();
3511 >        ThreadExecutor executor = new ThreadExecutor();
3512 >        f.completeAsync(() -> {if (true) throw ex; return 1;}, executor);
3513 >        try {
3514 >            f.join();
3515 >            shouldThrow();
3516 >        } catch (CompletionException success) {}
3517 >        checkCompletedWithWrappedException(f, ex);
3518 >        assertEquals(1, executor.count.get());
3519 >    }
3520  
3521 <        f = new CompletableFuture<>();
3522 <        g = f.handleAsync(r = new IntegerHandler());
3523 <        assertFalse(r.ran);
3524 <        f.completeExceptionally(new CFException());
3525 <        checkCompletedWithWrappedCFException(f);
3526 <        checkCompletedNormally(g, three);
3527 <        assertTrue(r.ran);
3521 >    /**
3522 >     * orTimeout completes with TimeoutException if not complete
3523 >     */
3524 >    public void testOrTimeout_timesOut() {
3525 >        long timeoutMillis = timeoutMillis();
3526 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3527 >        long startTime = System.nanoTime();
3528 >        assertSame(f, f.orTimeout(timeoutMillis, MILLISECONDS));
3529 >        checkCompletedWithTimeoutException(f);
3530 >        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3531 >    }
3532  
3533 <        f = new CompletableFuture<>();
3534 <        g = f.handleAsync(r = new IntegerHandler());
3535 <        assertFalse(r.ran);
3536 <        f.complete(one);
3537 <        checkCompletedNormally(f, one);
3538 <        checkCompletedNormally(g, two);
3539 <        assertTrue(r.ran);
3533 >    /**
3534 >     * orTimeout completes normally if completed before timeout
3535 >     */
3536 >    public void testOrTimeout_completed() {
3537 >        for (Integer v1 : new Integer[] { 1, null })
3538 >    {
3539 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3540 >        CompletableFuture<Integer> g = new CompletableFuture<>();
3541 >        long startTime = System.nanoTime();
3542 >        f.complete(v1);
3543 >        assertSame(f, f.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3544 >        assertSame(g, g.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3545 >        g.complete(v1);
3546 >        checkCompletedNormally(f, v1);
3547 >        checkCompletedNormally(g, v1);
3548 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3549 >    }}
3550  
3551 <        f = new CompletableFuture<>();
3552 <        g = f.handleAsync(r = new IntegerHandler());
3553 <        assertFalse(r.ran);
3554 <        f.complete(one);
3555 <        checkCompletedNormally(f, one);
3556 <        checkCompletedNormally(g, two);
3549 <        assertTrue(r.ran);
3551 >    /**
3552 >     * completeOnTimeout completes with given value if not complete
3553 >     */
3554 >    public void testCompleteOnTimeout_timesOut() {
3555 >        testInParallel(() -> testCompleteOnTimeout_timesOut(42),
3556 >                       () -> testCompleteOnTimeout_timesOut(null));
3557      }
3558  
3559      /**
3560 <     * handleAsync action with Executor completes normally with
3554 <     * function value on either normal or exceptional completion of
3555 <     * source
3560 >     * completeOnTimeout completes with given value if not complete
3561       */
3562 <    public void testHandleAsync2() {
3563 <        CompletableFuture<Integer> f, g;
3564 <        ThreadExecutor exec = new ThreadExecutor();
3565 <        IntegerHandler r;
3562 >    public void testCompleteOnTimeout_timesOut(Integer v) {
3563 >        long timeoutMillis = timeoutMillis();
3564 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3565 >        long startTime = System.nanoTime();
3566 >        assertSame(f, f.completeOnTimeout(v, timeoutMillis, MILLISECONDS));
3567 >        assertSame(v, f.join());
3568 >        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3569 >        f.complete(99);         // should have no effect
3570 >        checkCompletedNormally(f, v);
3571 >    }
3572  
3573 <        f = new CompletableFuture<>();
3574 <        g = f.handleAsync(r = new IntegerHandler(), exec);
3575 <        assertFalse(r.ran);
3576 <        f.completeExceptionally(new CFException());
3577 <        checkCompletedWithWrappedCFException(f);
3578 <        checkCompletedNormally(g, three);
3579 <        assertTrue(r.ran);
3573 >    /**
3574 >     * completeOnTimeout has no effect if completed within timeout
3575 >     */
3576 >    public void testCompleteOnTimeout_completed() {
3577 >        for (Integer v1 : new Integer[] { 1, null })
3578 >    {
3579 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3580 >        CompletableFuture<Integer> g = new CompletableFuture<>();
3581 >        long startTime = System.nanoTime();
3582 >        f.complete(v1);
3583 >        assertSame(f, f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3584 >        assertSame(g, g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3585 >        g.complete(v1);
3586 >        checkCompletedNormally(f, v1);
3587 >        checkCompletedNormally(g, v1);
3588 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3589 >    }}
3590  
3591 <        f = new CompletableFuture<>();
3592 <        g = f.handleAsync(r = new IntegerHandler(), exec);
3593 <        assertFalse(r.ran);
3594 <        f.completeExceptionally(new CFException());
3595 <        checkCompletedWithWrappedCFException(f);
3596 <        checkCompletedNormally(g, three);
3597 <        assertTrue(r.ran);
3591 >    /**
3592 >     * delayedExecutor returns an executor that delays submission
3593 >     */
3594 >    public void testDelayedExecutor() {
3595 >        testInParallel(() -> testDelayedExecutor(null, null),
3596 >                       () -> testDelayedExecutor(null, 1),
3597 >                       () -> testDelayedExecutor(new ThreadExecutor(), 1),
3598 >                       () -> testDelayedExecutor(new ThreadExecutor(), 1));
3599 >    }
3600 >
3601 >    public void testDelayedExecutor(Executor executor, Integer v) throws Exception {
3602 >        long timeoutMillis = timeoutMillis();
3603 >        // Use an "unreasonably long" long timeout to catch lingering threads
3604 >        long longTimeoutMillis = 1000 * 60 * 60 * 24;
3605 >        final Executor delayer, longDelayer;
3606 >        if (executor == null) {
3607 >            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS);
3608 >            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS);
3609 >        } else {
3610 >            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS, executor);
3611 >            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS, executor);
3612 >        }
3613 >        long startTime = System.nanoTime();
3614 >        CompletableFuture<Integer> f =
3615 >            CompletableFuture.supplyAsync(() -> v, delayer);
3616 >        CompletableFuture<Integer> g =
3617 >            CompletableFuture.supplyAsync(() -> v, longDelayer);
3618  
3619 <        f = new CompletableFuture<>();
3579 <        g = f.handleAsync(r = new IntegerHandler(), exec);
3580 <        assertFalse(r.ran);
3581 <        f.complete(one);
3582 <        checkCompletedNormally(f, one);
3583 <        checkCompletedNormally(g, two);
3584 <        assertTrue(r.ran);
3619 >        assertNull(g.getNow(null));
3620  
3621 <        f = new CompletableFuture<>();
3622 <        g = f.handleAsync(r = new IntegerHandler(), exec);
3623 <        assertFalse(r.ran);
3624 <        f.complete(one);
3625 <        checkCompletedNormally(f, one);
3626 <        checkCompletedNormally(g, two);
3627 <        assertTrue(r.ran);
3621 >        assertSame(v, f.get(LONG_DELAY_MS, MILLISECONDS));
3622 >        long millisElapsed = millisElapsedSince(startTime);
3623 >        assertTrue(millisElapsed >= timeoutMillis);
3624 >        assertTrue(millisElapsed < LONG_DELAY_MS / 2);
3625 >
3626 >        checkCompletedNormally(f, v);
3627 >
3628 >        checkIncomplete(g);
3629 >        assertTrue(g.cancel(true));
3630 >    }
3631 >
3632 >    //--- tests of implementation details; not part of official tck ---
3633 >
3634 >    Object resultOf(CompletableFuture<?> f) {
3635 >        try {
3636 >            java.lang.reflect.Field resultField
3637 >                = CompletableFuture.class.getDeclaredField("result");
3638 >            resultField.setAccessible(true);
3639 >            return resultField.get(f);
3640 >        } catch (Throwable t) { throw new AssertionError(t); }
3641      }
3642  
3643 +    public void testExceptionPropagationReusesResultObject() {
3644 +        if (!testImplementationDetails) return;
3645 +        for (ExecutionMode m : ExecutionMode.values())
3646 +    {
3647 +        final CFException ex = new CFException();
3648 +        final CompletableFuture<Integer> v42 = CompletableFuture.completedFuture(42);
3649 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3650 +
3651 +        List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> funs
3652 +            = new ArrayList<>();
3653 +
3654 +        funs.add((y) -> m.thenRun(y, new Noop(m)));
3655 +        funs.add((y) -> m.thenAccept(y, new NoopConsumer(m)));
3656 +        funs.add((y) -> m.thenApply(y, new IncFunction(m)));
3657 +
3658 +        funs.add((y) -> m.runAfterEither(y, incomplete, new Noop(m)));
3659 +        funs.add((y) -> m.acceptEither(y, incomplete, new NoopConsumer(m)));
3660 +        funs.add((y) -> m.applyToEither(y, incomplete, new IncFunction(m)));
3661 +
3662 +        funs.add((y) -> m.runAfterBoth(y, v42, new Noop(m)));
3663 +        funs.add((y) -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3664 +        funs.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m)));
3665 +
3666 +        funs.add((y) -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
3667 +
3668 +        funs.add((y) -> m.thenCompose(y, new CompletableFutureInc(m)));
3669 +
3670 +        funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y, v42}));
3671 +        funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y, incomplete}));
3672 +
3673 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3674 +                 fun : funs) {
3675 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3676 +            f.completeExceptionally(ex);
3677 +            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3678 +            checkCompletedWithWrappedException(src, ex);
3679 +            CompletableFuture<?> dep = fun.apply(src);
3680 +            checkCompletedWithWrappedException(dep, ex);
3681 +            assertSame(resultOf(src), resultOf(dep));
3682 +        }
3683 +
3684 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3685 +                 fun : funs) {
3686 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3687 +            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3688 +            CompletableFuture<?> dep = fun.apply(src);
3689 +            f.completeExceptionally(ex);
3690 +            checkCompletedWithWrappedException(src, ex);
3691 +            checkCompletedWithWrappedException(dep, ex);
3692 +            assertSame(resultOf(src), resultOf(dep));
3693 +        }
3694 +
3695 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3696 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3697 +                 fun : funs) {
3698 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3699 +            f.cancel(mayInterruptIfRunning);
3700 +            checkCancelled(f);
3701 +            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3702 +            checkCompletedWithWrappedCancellationException(src);
3703 +            CompletableFuture<?> dep = fun.apply(src);
3704 +            checkCompletedWithWrappedCancellationException(dep);
3705 +            assertSame(resultOf(src), resultOf(dep));
3706 +        }
3707 +
3708 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3709 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3710 +                 fun : funs) {
3711 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3712 +            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3713 +            CompletableFuture<?> dep = fun.apply(src);
3714 +            f.cancel(mayInterruptIfRunning);
3715 +            checkCancelled(f);
3716 +            checkCompletedWithWrappedCancellationException(src);
3717 +            checkCompletedWithWrappedCancellationException(dep);
3718 +            assertSame(resultOf(src), resultOf(dep));
3719 +        }
3720 +    }}
3721 +
3722 +    /**
3723 +     * Minimal completion stages throw UOE for all non-CompletionStage methods
3724 +     */
3725 +    public void testMinimalCompletionStage_minimality() {
3726 +        if (!testImplementationDetails) return;
3727 +        Function<Method, String> toSignature =
3728 +            (method) -> method.getName() + Arrays.toString(method.getParameterTypes());
3729 +        Predicate<Method> isNotStatic =
3730 +            (method) -> (method.getModifiers() & Modifier.STATIC) == 0;
3731 +        List<Method> minimalMethods =
3732 +            Stream.of(Object.class, CompletionStage.class)
3733 +            .flatMap((klazz) -> Stream.of(klazz.getMethods()))
3734 +            .filter(isNotStatic)
3735 +            .collect(Collectors.toList());
3736 +        // Methods from CompletableFuture permitted NOT to throw UOE
3737 +        String[] signatureWhitelist = {
3738 +            "newIncompleteFuture[]",
3739 +            "defaultExecutor[]",
3740 +            "minimalCompletionStage[]",
3741 +            "copy[]",
3742 +        };
3743 +        Set<String> permittedMethodSignatures =
3744 +            Stream.concat(minimalMethods.stream().map(toSignature),
3745 +                          Stream.of(signatureWhitelist))
3746 +            .collect(Collectors.toSet());
3747 +        List<Method> allMethods = Stream.of(CompletableFuture.class.getMethods())
3748 +            .filter(isNotStatic)
3749 +            .filter((method) -> !permittedMethodSignatures.contains(toSignature.apply(method)))
3750 +            .collect(Collectors.toList());
3751 +
3752 +        CompletionStage<Integer> minimalStage =
3753 +            new CompletableFuture<Integer>().minimalCompletionStage();
3754 +
3755 +        List<Method> bugs = new ArrayList<>();
3756 +        for (Method method : allMethods) {
3757 +            Class<?>[] parameterTypes = method.getParameterTypes();
3758 +            Object[] args = new Object[parameterTypes.length];
3759 +            // Manufacture boxed primitives for primitive params
3760 +            for (int i = 0; i < args.length; i++) {
3761 +                Class<?> type = parameterTypes[i];
3762 +                if (parameterTypes[i] == boolean.class)
3763 +                    args[i] = false;
3764 +                else if (parameterTypes[i] == int.class)
3765 +                    args[i] = 0;
3766 +                else if (parameterTypes[i] == long.class)
3767 +                    args[i] = 0L;
3768 +            }
3769 +            try {
3770 +                method.invoke(minimalStage, args);
3771 +                bugs.add(method);
3772 +            }
3773 +            catch (java.lang.reflect.InvocationTargetException expected) {
3774 +                if (! (expected.getCause() instanceof UnsupportedOperationException)) {
3775 +                    bugs.add(method);
3776 +                    // expected.getCause().printStackTrace();
3777 +                }
3778 +            }
3779 +            catch (ReflectiveOperationException bad) { throw new Error(bad); }
3780 +        }
3781 +        if (!bugs.isEmpty())
3782 +            throw new Error("Methods did not throw UOE: " + bugs.toString());
3783 +    }
3784 +
3785 +    static class Monad {
3786 +        static class ZeroException extends RuntimeException {
3787 +            public ZeroException() { super("monadic zero"); }
3788 +        }
3789 +        // "return", "unit"
3790 +        static <T> CompletableFuture<T> unit(T value) {
3791 +            return completedFuture(value);
3792 +        }
3793 +        // monadic zero ?
3794 +        static <T> CompletableFuture<T> zero() {
3795 +            return failedFuture(new ZeroException());
3796 +        }
3797 +        // >=>
3798 +        static <T,U,V> Function<T, CompletableFuture<V>> compose
3799 +            (Function<T, CompletableFuture<U>> f,
3800 +             Function<U, CompletableFuture<V>> g) {
3801 +            return (x) -> f.apply(x).thenCompose(g);
3802 +        }
3803 +
3804 +        static void assertZero(CompletableFuture<?> f) {
3805 +            try {
3806 +                f.getNow(null);
3807 +                throw new AssertionFailedError("should throw");
3808 +            } catch (CompletionException success) {
3809 +                assertTrue(success.getCause() instanceof ZeroException);
3810 +            }
3811 +        }
3812 +
3813 +        static <T> void assertFutureEquals(CompletableFuture<T> f,
3814 +                                           CompletableFuture<T> g) {
3815 +            T fval = null, gval = null;
3816 +            Throwable fex = null, gex = null;
3817 +
3818 +            try { fval = f.get(); }
3819 +            catch (ExecutionException ex) { fex = ex.getCause(); }
3820 +            catch (Throwable ex) { fex = ex; }
3821 +
3822 +            try { gval = g.get(); }
3823 +            catch (ExecutionException ex) { gex = ex.getCause(); }
3824 +            catch (Throwable ex) { gex = ex; }
3825 +
3826 +            if (fex != null || gex != null)
3827 +                assertSame(fex.getClass(), gex.getClass());
3828 +            else
3829 +                assertEquals(fval, gval);
3830 +        }
3831 +
3832 +        static class PlusFuture<T> extends CompletableFuture<T> {
3833 +            AtomicReference<Throwable> firstFailure = new AtomicReference<>(null);
3834 +        }
3835 +
3836 +        /** Implements "monadic plus". */
3837 +        static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f,
3838 +                                             CompletableFuture<? extends T> g) {
3839 +            PlusFuture<T> plus = new PlusFuture<T>();
3840 +            BiConsumer<T, Throwable> action = (T result, Throwable ex) -> {
3841 +                try {
3842 +                    if (ex == null) {
3843 +                        if (plus.complete(result))
3844 +                            if (plus.firstFailure.get() != null)
3845 +                                plus.firstFailure.set(null);
3846 +                    }
3847 +                    else if (plus.firstFailure.compareAndSet(null, ex)) {
3848 +                        if (plus.isDone())
3849 +                            plus.firstFailure.set(null);
3850 +                    }
3851 +                    else {
3852 +                        // first failure has precedence
3853 +                        Throwable first = plus.firstFailure.getAndSet(null);
3854 +
3855 +                        // may fail with "Self-suppression not permitted"
3856 +                        try { first.addSuppressed(ex); }
3857 +                        catch (Exception ignored) {}
3858 +
3859 +                        plus.completeExceptionally(first);
3860 +                    }
3861 +                } catch (Throwable unexpected) {
3862 +                    plus.completeExceptionally(unexpected);
3863 +                }
3864 +            };
3865 +            f.whenComplete(action);
3866 +            g.whenComplete(action);
3867 +            return plus;
3868 +        }
3869 +    }
3870 +
3871 +    /**
3872 +     * CompletableFuture is an additive monad - sort of.
3873 +     * https://en.wikipedia.org/wiki/Monad_(functional_programming)#Additive_monads
3874 +     */
3875 +    public void testAdditiveMonad() throws Throwable {
3876 +        Function<Long, CompletableFuture<Long>> unit = Monad::unit;
3877 +        CompletableFuture<Long> zero = Monad.zero();
3878 +
3879 +        // Some mutually non-commutative functions
3880 +        Function<Long, CompletableFuture<Long>> triple
3881 +            = (x) -> Monad.unit(3 * x);
3882 +        Function<Long, CompletableFuture<Long>> inc
3883 +            = (x) -> Monad.unit(x + 1);
3884 +
3885 +        // unit is a right identity: m >>= unit === m
3886 +        Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
3887 +                                 inc.apply(5L));
3888 +        // unit is a left identity: (unit x) >>= f === f x
3889 +        Monad.assertFutureEquals(unit.apply(5L).thenCompose(inc),
3890 +                                 inc.apply(5L));
3891 +
3892 +        // associativity: (m >>= f) >>= g === m >>= ( \x -> (f x >>= g) )
3893 +        Monad.assertFutureEquals(
3894 +            unit.apply(5L).thenCompose(inc).thenCompose(triple),
3895 +            unit.apply(5L).thenCompose((x) -> inc.apply(x).thenCompose(triple)));
3896 +
3897 +        // The case for CompletableFuture as an additive monad is weaker...
3898 +
3899 +        // zero is a monadic zero
3900 +        Monad.assertZero(zero);
3901 +
3902 +        // left zero: zero >>= f === zero
3903 +        Monad.assertZero(zero.thenCompose(inc));
3904 +        // right zero: f >>= (\x -> zero) === zero
3905 +        Monad.assertZero(inc.apply(5L).thenCompose((x) -> zero));
3906 +
3907 +        // f plus zero === f
3908 +        Monad.assertFutureEquals(Monad.unit(5L),
3909 +                                 Monad.plus(Monad.unit(5L), zero));
3910 +        // zero plus f === f
3911 +        Monad.assertFutureEquals(Monad.unit(5L),
3912 +                                 Monad.plus(zero, Monad.unit(5L)));
3913 +        // zero plus zero === zero
3914 +        Monad.assertZero(Monad.plus(zero, zero));
3915 +        {
3916 +            CompletableFuture<Long> f = Monad.plus(Monad.unit(5L),
3917 +                                                   Monad.unit(8L));
3918 +            // non-determinism
3919 +            assertTrue(f.get() == 5L || f.get() == 8L);
3920 +        }
3921 +
3922 +        CompletableFuture<Long> godot = new CompletableFuture<>();
3923 +        // f plus godot === f (doesn't wait for godot)
3924 +        Monad.assertFutureEquals(Monad.unit(5L),
3925 +                                 Monad.plus(Monad.unit(5L), godot));
3926 +        // godot plus f === f (doesn't wait for godot)
3927 +        Monad.assertFutureEquals(Monad.unit(5L),
3928 +                                 Monad.plus(godot, Monad.unit(5L)));
3929 +    }
3930 +
3931 +    /**
3932 +     * A single CompletableFuture with many dependents.
3933 +     * A demo of scalability - runtime is O(n).
3934 +     */
3935 +    public void testManyDependents() throws Throwable {
3936 +        final int n = 1_000;
3937 +        final CompletableFuture<Void> head = new CompletableFuture<>();
3938 +        final CompletableFuture<Void> complete = CompletableFuture.completedFuture((Void)null);
3939 +        final AtomicInteger count = new AtomicInteger(0);
3940 +        for (int i = 0; i < n; i++) {
3941 +            head.thenRun(() -> count.getAndIncrement());
3942 +            head.thenAccept((x) -> count.getAndIncrement());
3943 +            head.thenApply((x) -> count.getAndIncrement());
3944 +
3945 +            head.runAfterBoth(complete, () -> count.getAndIncrement());
3946 +            head.thenAcceptBoth(complete, (x, y) -> count.getAndIncrement());
3947 +            head.thenCombine(complete, (x, y) -> count.getAndIncrement());
3948 +            complete.runAfterBoth(head, () -> count.getAndIncrement());
3949 +            complete.thenAcceptBoth(head, (x, y) -> count.getAndIncrement());
3950 +            complete.thenCombine(head, (x, y) -> count.getAndIncrement());
3951 +
3952 +            head.runAfterEither(new CompletableFuture<Void>(), () -> count.getAndIncrement());
3953 +            head.acceptEither(new CompletableFuture<Void>(), (x) -> count.getAndIncrement());
3954 +            head.applyToEither(new CompletableFuture<Void>(), (x) -> count.getAndIncrement());
3955 +            new CompletableFuture<Void>().runAfterEither(head, () -> count.getAndIncrement());
3956 +            new CompletableFuture<Void>().acceptEither(head, (x) -> count.getAndIncrement());
3957 +            new CompletableFuture<Void>().applyToEither(head, (x) -> count.getAndIncrement());
3958 +        }
3959 +        head.complete(null);
3960 +        assertEquals(5 * 3 * n, count.get());
3961 +    }
3962 +
3963 + //     static <U> U join(CompletionStage<U> stage) {
3964 + //         CompletableFuture<U> f = new CompletableFuture<>();
3965 + //         stage.whenComplete((v, ex) -> {
3966 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
3967 + //         });
3968 + //         return f.join();
3969 + //     }
3970 +
3971 + //     static <U> boolean isDone(CompletionStage<U> stage) {
3972 + //         CompletableFuture<U> f = new CompletableFuture<>();
3973 + //         stage.whenComplete((v, ex) -> {
3974 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
3975 + //         });
3976 + //         return f.isDone();
3977 + //     }
3978 +
3979 + //     static <U> U join2(CompletionStage<U> stage) {
3980 + //         return stage.toCompletableFuture().copy().join();
3981 + //     }
3982 +
3983 + //     static <U> boolean isDone2(CompletionStage<U> stage) {
3984 + //         return stage.toCompletableFuture().copy().isDone();
3985 + //     }
3986 +
3987   }

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