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Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.47 by jsr166, Mon Jun 2 18:21:34 2014 UTC vs.
Revision 1.185 by jsr166, Mon May 29 19:15:02 2017 UTC

# Line 5 | Line 5
5   * http://creativecommons.org/publicdomain/zero/1.0/
6   */
7  
8 < import junit.framework.*;
8 > import static java.util.concurrent.TimeUnit.MILLISECONDS;
9 > import static java.util.concurrent.TimeUnit.SECONDS;
10 > import static java.util.concurrent.CompletableFuture.completedFuture;
11 > import static java.util.concurrent.CompletableFuture.failedFuture;
12 >
13 > import java.lang.reflect.Method;
14 > import java.lang.reflect.Modifier;
15 >
16 > import java.util.stream.Collectors;
17 > import java.util.stream.Stream;
18 >
19 > import java.util.ArrayList;
20 > import java.util.Arrays;
21 > import java.util.List;
22 > import java.util.Objects;
23 > import java.util.Set;
24   import java.util.concurrent.Callable;
10 import java.util.concurrent.Executor;
11 import java.util.concurrent.ExecutorService;
12 import java.util.concurrent.Executors;
25   import java.util.concurrent.CancellationException;
14 import java.util.concurrent.CountDownLatch;
15 import java.util.concurrent.ExecutionException;
16 import java.util.concurrent.Future;
26   import java.util.concurrent.CompletableFuture;
27   import java.util.concurrent.CompletionException;
28   import java.util.concurrent.CompletionStage;
29 + import java.util.concurrent.ExecutionException;
30 + import java.util.concurrent.Executor;
31 + import java.util.concurrent.ForkJoinPool;
32 + import java.util.concurrent.ForkJoinTask;
33 + import java.util.concurrent.RejectedExecutionException;
34   import java.util.concurrent.TimeoutException;
35   import java.util.concurrent.atomic.AtomicInteger;
36 < import static java.util.concurrent.TimeUnit.MILLISECONDS;
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); }
66          try {
67 <            f.get(0L, SECONDS);
67 >            f.get(randomExpiredTimeout(), randomTimeUnit());
68              shouldThrow();
69          }
70          catch (TimeoutException success) {}
# 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());
63        } catch (Throwable fail) { threadUnexpectedException(fail); }
64        try {
79              assertEquals(value, f.getNow(null));
66        } catch (Throwable fail) { threadUnexpectedException(fail); }
67        try {
80              assertEquals(value, f.get());
81          } catch (Throwable fail) { threadUnexpectedException(fail); }
82          assertTrue(f.isDone());
# Line 73 | Line 85 | public class CompletableFutureTest exten
85          assertTrue(f.toString().contains("[Completed normally]"));
86      }
87  
88 <    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
89 <        try {
90 <            f.get(LONG_DELAY_MS, MILLISECONDS);
91 <            shouldThrow();
92 <        } catch (ExecutionException success) {
93 <            assertTrue(success.getCause() instanceof CFException);
94 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
95 <        try {
96 <            f.join();
97 <            shouldThrow();
98 <        } catch (CompletionException success) {
99 <            assertTrue(success.getCause() instanceof CFException);
100 <        }
101 <        try {
102 <            f.getNow(null);
103 <            shouldThrow();
104 <        } catch (CompletionException success) {
93 <            assertTrue(success.getCause() instanceof CFException);
88 >    /**
89 >     * Returns the "raw" internal exceptional completion of f,
90 >     * without any additional wrapping with CompletionException.
91 >     */
92 >    Throwable exceptionalCompletion(CompletableFuture<?> f) {
93 >        // handle (and whenComplete and exceptionally) can distinguish
94 >        // between "direct" and "wrapped" exceptional completion
95 >        return f.handle((u, t) -> t).join();
96 >    }
97 >
98 >    void checkCompletedExceptionally(CompletableFuture<?> f,
99 >                                     boolean wrapped,
100 >                                     Consumer<Throwable> checker) {
101 >        Throwable cause = exceptionalCompletion(f);
102 >        if (wrapped) {
103 >            assertTrue(cause instanceof CompletionException);
104 >            cause = cause.getCause();
105          }
106 <        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 <    }
106 >        checker.accept(cause);
107  
108 <    void checkCompletedWithWrappedCFException(CompletableFuture<?> f,
107 <                                              CFException ex) {
108 >        long startTime = System.nanoTime();
109          try {
110              f.get(LONG_DELAY_MS, MILLISECONDS);
111              shouldThrow();
112          } catch (ExecutionException success) {
113 <            assertSame(ex, success.getCause());
113 >            assertSame(cause, success.getCause());
114          } catch (Throwable fail) { threadUnexpectedException(fail); }
115 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
116 +
117          try {
118              f.join();
119              shouldThrow();
120          } catch (CompletionException success) {
121 <            assertSame(ex, success.getCause());
122 <        }
121 >            assertSame(cause, success.getCause());
122 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
123 >
124          try {
125              f.getNow(null);
126              shouldThrow();
127          } catch (CompletionException success) {
128 <            assertSame(ex, success.getCause());
129 <        }
128 >            assertSame(cause, success.getCause());
129 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
130 >
131          try {
132              f.get();
133              shouldThrow();
134          } catch (ExecutionException success) {
135 <            assertSame(ex, success.getCause());
135 >            assertSame(cause, success.getCause());
136          } catch (Throwable fail) { threadUnexpectedException(fail); }
137 <        assertTrue(f.isDone());
137 >
138          assertFalse(f.isCancelled());
139 +        assertTrue(f.isDone());
140 +        assertTrue(f.isCompletedExceptionally());
141          assertTrue(f.toString().contains("[Completed exceptionally]"));
142      }
143  
144 +    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
145 +        checkCompletedExceptionally(f, true,
146 +            t -> assertTrue(t instanceof CFException));
147 +    }
148 +
149 +    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
150 +        checkCompletedExceptionally(f, true,
151 +            t -> assertTrue(t instanceof CancellationException));
152 +    }
153 +
154 +    void checkCompletedWithTimeoutException(CompletableFuture<?> f) {
155 +        checkCompletedExceptionally(f, false,
156 +            t -> assertTrue(t instanceof TimeoutException));
157 +    }
158 +
159 +    void checkCompletedWithWrappedException(CompletableFuture<?> f,
160 +                                            Throwable ex) {
161 +        checkCompletedExceptionally(f, true, t -> assertSame(t, ex));
162 +    }
163 +
164 +    void checkCompletedExceptionally(CompletableFuture<?> f, Throwable ex) {
165 +        checkCompletedExceptionally(f, false, t -> assertSame(t, ex));
166 +    }
167 +
168      void checkCancelled(CompletableFuture<?> f) {
169 +        long startTime = System.nanoTime();
170          try {
171              f.get(LONG_DELAY_MS, MILLISECONDS);
172              shouldThrow();
173          } catch (CancellationException success) {
174          } catch (Throwable fail) { threadUnexpectedException(fail); }
175 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
176 +
177          try {
178              f.join();
179              shouldThrow();
# Line 153 | Line 187 | public class CompletableFutureTest exten
187              shouldThrow();
188          } catch (CancellationException success) {
189          } 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    }
190  
191 <    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
192 <        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); }
191 >        assertTrue(exceptionalCompletion(f) instanceof CancellationException);
192 >
193          assertTrue(f.isDone());
188        assertFalse(f.isCancelled());
194          assertTrue(f.isCompletedExceptionally());
195 +        assertTrue(f.isCancelled());
196          assertTrue(f.toString().contains("[Completed exceptionally]"));
197      }
198  
# Line 204 | Line 210 | public class CompletableFutureTest exten
210       * isCancelled, join, get, and getNow
211       */
212      public void testComplete() {
213 +        for (Integer v1 : new Integer[] { 1, null })
214 +    {
215          CompletableFuture<Integer> f = new CompletableFuture<>();
216          checkIncomplete(f);
217 <        f.complete(one);
218 <        checkCompletedNormally(f, one);
219 <    }
217 >        assertTrue(f.complete(v1));
218 >        assertFalse(f.complete(v1));
219 >        checkCompletedNormally(f, v1);
220 >    }}
221  
222      /**
223       * completeExceptionally completes exceptionally, as indicated by
# Line 216 | Line 225 | public class CompletableFutureTest exten
225       */
226      public void testCompleteExceptionally() {
227          CompletableFuture<Integer> f = new CompletableFuture<>();
228 +        CFException ex = new CFException();
229          checkIncomplete(f);
230 <        f.completeExceptionally(new CFException());
231 <        checkCompletedWithWrappedCFException(f);
230 >        f.completeExceptionally(ex);
231 >        checkCompletedExceptionally(f, ex);
232      }
233  
234      /**
# Line 226 | Line 236 | public class CompletableFutureTest exten
236       * methods isDone, isCancelled, join, get, and getNow
237       */
238      public void testCancel() {
239 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
240 +    {
241          CompletableFuture<Integer> f = new CompletableFuture<>();
242          checkIncomplete(f);
243 <        assertTrue(f.cancel(true));
243 >        assertTrue(f.cancel(mayInterruptIfRunning));
244 >        assertTrue(f.cancel(mayInterruptIfRunning));
245 >        assertTrue(f.cancel(!mayInterruptIfRunning));
246          checkCancelled(f);
247 <    }
247 >    }}
248  
249      /**
250       * obtrudeValue forces completion with given value
# Line 238 | Line 252 | public class CompletableFutureTest exten
252      public void testObtrudeValue() {
253          CompletableFuture<Integer> f = new CompletableFuture<>();
254          checkIncomplete(f);
255 <        f.complete(one);
255 >        assertTrue(f.complete(one));
256          checkCompletedNormally(f, one);
257          f.obtrudeValue(three);
258          checkCompletedNormally(f, three);
# Line 259 | Line 273 | public class CompletableFutureTest exten
273       * obtrudeException forces completion with given exception
274       */
275      public void testObtrudeException() {
276 <        CompletableFuture<Integer> f = new CompletableFuture<>();
277 <        checkIncomplete(f);
278 <        f.complete(one);
279 <        checkCompletedNormally(f, one);
280 <        f.obtrudeException(new CFException());
281 <        checkCompletedWithWrappedCFException(f);
276 >        for (Integer v1 : new Integer[] { 1, null })
277 >    {
278 >        CFException ex;
279 >        CompletableFuture<Integer> f;
280 >
281 >        f = new CompletableFuture<>();
282 >        assertTrue(f.complete(v1));
283 >        for (int i = 0; i < 2; i++) {
284 >            f.obtrudeException(ex = new CFException());
285 >            checkCompletedExceptionally(f, ex);
286 >        }
287 >
288          f = new CompletableFuture<>();
289 <        f.obtrudeException(new CFException());
290 <        checkCompletedWithWrappedCFException(f);
289 >        for (int i = 0; i < 2; i++) {
290 >            f.obtrudeException(ex = new CFException());
291 >            checkCompletedExceptionally(f, ex);
292 >        }
293 >
294          f = new CompletableFuture<>();
295 +        f.completeExceptionally(ex = new CFException());
296 +        f.obtrudeValue(v1);
297 +        checkCompletedNormally(f, v1);
298 +        f.obtrudeException(ex = new CFException());
299 +        checkCompletedExceptionally(f, ex);
300          f.completeExceptionally(new CFException());
301 <        f.obtrudeValue(four);
302 <        checkCompletedNormally(f, four);
303 <        f.obtrudeException(new CFException());
304 <        checkCompletedWithWrappedCFException(f);
277 <    }
301 >        checkCompletedExceptionally(f, ex);
302 >        assertFalse(f.complete(v1));
303 >        checkCompletedExceptionally(f, ex);
304 >    }}
305  
306      /**
307       * getNumberOfDependents returns number of dependent tasks
308       */
309      public void testGetNumberOfDependents() {
310 +        for (ExecutionMode m : ExecutionMode.values())
311 +        for (Integer v1 : new Integer[] { 1, null })
312 +    {
313          CompletableFuture<Integer> f = new CompletableFuture<>();
314          assertEquals(0, f.getNumberOfDependents());
315 <        CompletableFuture g = f.thenRun(new Noop());
315 >        final CompletableFuture<Void> g = m.thenRun(f, new Noop(m));
316          assertEquals(1, f.getNumberOfDependents());
317          assertEquals(0, g.getNumberOfDependents());
318 <        CompletableFuture h = f.thenRun(new Noop());
318 >        final CompletableFuture<Void> h = m.thenRun(f, new Noop(m));
319          assertEquals(2, f.getNumberOfDependents());
320 <        f.complete(1);
320 >        assertEquals(0, h.getNumberOfDependents());
321 >        assertTrue(f.complete(v1));
322          checkCompletedNormally(g, null);
323 +        checkCompletedNormally(h, null);
324          assertEquals(0, f.getNumberOfDependents());
325          assertEquals(0, g.getNumberOfDependents());
326 <    }
326 >        assertEquals(0, h.getNumberOfDependents());
327 >    }}
328  
329      /**
330       * toString indicates current completion state
# Line 302 | Line 335 | public class CompletableFutureTest exten
335          f = new CompletableFuture<String>();
336          assertTrue(f.toString().contains("[Not completed]"));
337  
338 <        f.complete("foo");
338 >        assertTrue(f.complete("foo"));
339          assertTrue(f.toString().contains("[Completed normally]"));
340  
341          f = new CompletableFuture<String>();
342 <        f.completeExceptionally(new IndexOutOfBoundsException());
342 >        assertTrue(f.completeExceptionally(new IndexOutOfBoundsException()));
343          assertTrue(f.toString().contains("[Completed exceptionally]"));
344 +
345 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
346 +            f = new CompletableFuture<String>();
347 +            assertTrue(f.cancel(mayInterruptIfRunning));
348 +            assertTrue(f.toString().contains("[Completed exceptionally]"));
349 +        }
350      }
351  
352      /**
# Line 318 | Line 357 | public class CompletableFutureTest exten
357          checkCompletedNormally(f, "test");
358      }
359  
360 <    // Choose non-commutative actions for better coverage
360 >    abstract static class CheckedAction {
361 >        int invocationCount = 0;
362 >        final ExecutionMode m;
363 >        CheckedAction(ExecutionMode m) { this.m = m; }
364 >        void invoked() {
365 >            m.checkExecutionMode();
366 >            assertEquals(0, invocationCount++);
367 >        }
368 >        void assertNotInvoked() { assertEquals(0, invocationCount); }
369 >        void assertInvoked() { assertEquals(1, invocationCount); }
370 >    }
371  
372 <    // A non-commutative function that handles and produces null values as well.
373 <    static Integer subtract(Integer x, Integer y) {
374 <        return (x == null && y == null) ? null :
375 <            ((x == null) ? 42 : x.intValue())
376 <            - ((y == null) ? 99 : y.intValue());
372 >    abstract static class CheckedIntegerAction extends CheckedAction {
373 >        Integer value;
374 >        CheckedIntegerAction(ExecutionMode m) { super(m); }
375 >        void assertValue(Integer expected) {
376 >            assertInvoked();
377 >            assertEquals(expected, value);
378 >        }
379 >    }
380 >
381 >    static class IntegerSupplier extends CheckedAction
382 >        implements Supplier<Integer>
383 >    {
384 >        final Integer value;
385 >        IntegerSupplier(ExecutionMode m, Integer value) {
386 >            super(m);
387 >            this.value = value;
388 >        }
389 >        public Integer get() {
390 >            invoked();
391 >            return value;
392 >        }
393      }
394  
395      // A function that handles and produces null values as well.
# Line 332 | Line 397 | public class CompletableFutureTest exten
397          return (x == null) ? null : x + 1;
398      }
399  
400 <    static final Supplier<Integer> supplyOne =
401 <        () -> Integer.valueOf(1);
402 <    static final Function<Integer, Integer> inc =
403 <        (Integer x) -> Integer.valueOf(x.intValue() + 1);
339 <    static final BiFunction<Integer, Integer, Integer> subtract =
340 <        (Integer x, Integer y) -> subtract(x, y);
341 <    static final class IncAction implements Consumer<Integer> {
342 <        int invocationCount = 0;
343 <        Integer value;
400 >    static class NoopConsumer extends CheckedIntegerAction
401 >        implements Consumer<Integer>
402 >    {
403 >        NoopConsumer(ExecutionMode m) { super(m); }
404          public void accept(Integer x) {
405 <            invocationCount++;
406 <            value = inc(x);
405 >            invoked();
406 >            value = x;
407          }
408      }
409 <    static final class IncFunction implements Function<Integer,Integer> {
410 <        int invocationCount = 0;
411 <        Integer value;
409 >
410 >    static class IncFunction extends CheckedIntegerAction
411 >        implements Function<Integer,Integer>
412 >    {
413 >        IncFunction(ExecutionMode m) { super(m); }
414          public Integer apply(Integer x) {
415 <            invocationCount++;
415 >            invoked();
416              return value = inc(x);
417          }
418      }
419 <    static final class SubtractAction implements BiConsumer<Integer, Integer> {
420 <        int invocationCount = 0;
421 <        Integer value;
422 <        // Check this action was invoked exactly once when result is computed.
419 >
420 >    // Choose non-commutative actions for better coverage
421 >    // A non-commutative function that handles and produces null values as well.
422 >    static Integer subtract(Integer x, Integer y) {
423 >        return (x == null && y == null) ? null :
424 >            ((x == null) ? 42 : x.intValue())
425 >            - ((y == null) ? 99 : y.intValue());
426 >    }
427 >
428 >    static class SubtractAction extends CheckedIntegerAction
429 >        implements BiConsumer<Integer, Integer>
430 >    {
431 >        SubtractAction(ExecutionMode m) { super(m); }
432          public void accept(Integer x, Integer y) {
433 <            invocationCount++;
433 >            invoked();
434              value = subtract(x, y);
435          }
436      }
437 <    static final class SubtractFunction implements BiFunction<Integer, Integer, Integer> {
438 <        int invocationCount = 0;
439 <        Integer value;
440 <        // Check this action was invoked exactly once when result is computed.
437 >
438 >    static class SubtractFunction extends CheckedIntegerAction
439 >        implements BiFunction<Integer, Integer, Integer>
440 >    {
441 >        SubtractFunction(ExecutionMode m) { super(m); }
442          public Integer apply(Integer x, Integer y) {
443 <            invocationCount++;
443 >            invoked();
444              return value = subtract(x, y);
445          }
446      }
447 <    static final class Noop implements Runnable {
448 <        int invocationCount = 0;
447 >
448 >    static class Noop extends CheckedAction implements Runnable {
449 >        Noop(ExecutionMode m) { super(m); }
450          public void run() {
451 <            invocationCount++;
451 >            invoked();
452          }
453      }
454  
455 <    static final class FailingSupplier implements Supplier<Integer> {
456 <        int invocationCount = 0;
455 >    static class FailingSupplier extends CheckedAction
456 >        implements Supplier<Integer>
457 >    {
458 >        final CFException ex;
459 >        FailingSupplier(ExecutionMode m) { super(m); ex = new CFException(); }
460          public Integer get() {
461 <            invocationCount++;
462 <            throw new CFException();
461 >            invoked();
462 >            throw ex;
463          }
464      }
465 <    static final class FailingConsumer implements Consumer<Integer> {
466 <        int invocationCount = 0;
465 >
466 >    static class FailingConsumer extends CheckedIntegerAction
467 >        implements Consumer<Integer>
468 >    {
469 >        final CFException ex;
470 >        FailingConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
471          public void accept(Integer x) {
472 <            invocationCount++;
473 <            throw new CFException();
472 >            invoked();
473 >            value = x;
474 >            throw ex;
475          }
476      }
477 <    static final class FailingBiConsumer implements BiConsumer<Integer, Integer> {
478 <        int invocationCount = 0;
477 >
478 >    static class FailingBiConsumer extends CheckedIntegerAction
479 >        implements BiConsumer<Integer, Integer>
480 >    {
481 >        final CFException ex;
482 >        FailingBiConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
483          public void accept(Integer x, Integer y) {
484 <            invocationCount++;
485 <            throw new CFException();
484 >            invoked();
485 >            value = subtract(x, y);
486 >            throw ex;
487          }
488      }
489 <    static final class FailingFunction implements Function<Integer, Integer> {
490 <        int invocationCount = 0;
489 >
490 >    static class FailingFunction extends CheckedIntegerAction
491 >        implements Function<Integer, Integer>
492 >    {
493 >        final CFException ex;
494 >        FailingFunction(ExecutionMode m) { super(m); ex = new CFException(); }
495          public Integer apply(Integer x) {
496 <            invocationCount++;
497 <            throw new CFException();
496 >            invoked();
497 >            value = x;
498 >            throw ex;
499          }
500      }
501 <    static final class FailingBiFunction implements BiFunction<Integer, Integer, Integer> {
502 <        int invocationCount = 0;
501 >
502 >    static class FailingBiFunction extends CheckedIntegerAction
503 >        implements BiFunction<Integer, Integer, Integer>
504 >    {
505 >        final CFException ex;
506 >        FailingBiFunction(ExecutionMode m) { super(m); ex = new CFException(); }
507          public Integer apply(Integer x, Integer y) {
508 <            invocationCount++;
509 <            throw new CFException();
508 >            invoked();
509 >            value = subtract(x, y);
510 >            throw ex;
511          }
512      }
513 <    static final class FailingNoop implements Runnable {
514 <        int invocationCount = 0;
513 >
514 >    static class FailingRunnable extends CheckedAction implements Runnable {
515 >        final CFException ex;
516 >        FailingRunnable(ExecutionMode m) { super(m); ex = new CFException(); }
517          public void run() {
518 <            invocationCount++;
519 <            throw new CFException();
518 >            invoked();
519 >            throw ex;
520          }
521      }
522  
523 <    static final class CompletableFutureInc
524 <        implements Function<Integer, CompletableFuture<Integer>> {
525 <        int invocationCount = 0;
523 >    static class CompletableFutureInc extends CheckedIntegerAction
524 >        implements Function<Integer, CompletableFuture<Integer>>
525 >    {
526 >        CompletableFutureInc(ExecutionMode m) { super(m); }
527          public CompletableFuture<Integer> apply(Integer x) {
528 <            invocationCount++;
528 >            invoked();
529 >            value = x;
530              CompletableFuture<Integer> f = new CompletableFuture<>();
531 <            f.complete(inc(x));
531 >            assertTrue(f.complete(inc(x)));
532              return f;
533          }
534      }
535  
536 <    static final class FailingCompletableFutureFunction
537 <        implements Function<Integer, CompletableFuture<Integer>> {
538 <        int invocationCount = 0;
536 >    static class FailingCompletableFutureFunction extends CheckedIntegerAction
537 >        implements Function<Integer, CompletableFuture<Integer>>
538 >    {
539 >        final CFException ex;
540 >        FailingCompletableFutureFunction(ExecutionMode m) { super(m); ex = new CFException(); }
541          public CompletableFuture<Integer> apply(Integer x) {
542 <            invocationCount++;
543 <            throw new CFException();
542 >            invoked();
543 >            value = x;
544 >            throw ex;
545 >        }
546 >    }
547 >
548 >    static class CountingRejectingExecutor implements Executor {
549 >        final RejectedExecutionException ex = new RejectedExecutionException();
550 >        final AtomicInteger count = new AtomicInteger(0);
551 >        public void execute(Runnable r) {
552 >            count.getAndIncrement();
553 >            throw ex;
554          }
555      }
556  
557      // Used for explicit executor tests
558      static final class ThreadExecutor implements Executor {
559 <        AtomicInteger count = new AtomicInteger(0);
559 >        final AtomicInteger count = new AtomicInteger(0);
560 >        static final ThreadGroup tg = new ThreadGroup("ThreadExecutor");
561 >        static boolean startedCurrentThread() {
562 >            return Thread.currentThread().getThreadGroup() == tg;
563 >        }
564  
565          public void execute(Runnable r) {
566              count.getAndIncrement();
567 <            new Thread(r).start();
567 >            new Thread(tg, r).start();
568          }
569      }
570  
571 +    static final boolean defaultExecutorIsCommonPool
572 +        = ForkJoinPool.getCommonPoolParallelism() > 1;
573 +
574      /**
575       * Permits the testing of parallel code for the 3 different
576 <     * execution modes without repeating all the testing code.
576 >     * execution modes without copy/pasting all the test methods.
577       */
578      enum ExecutionMode {
579 <        DEFAULT {
579 >        SYNC {
580 >            public void checkExecutionMode() {
581 >                assertFalse(ThreadExecutor.startedCurrentThread());
582 >                assertNull(ForkJoinTask.getPool());
583 >            }
584 >            public CompletableFuture<Void> runAsync(Runnable a) {
585 >                throw new UnsupportedOperationException();
586 >            }
587 >            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
588 >                throw new UnsupportedOperationException();
589 >            }
590              public <T> CompletableFuture<Void> thenRun
591                  (CompletableFuture<T> f, Runnable a) {
592                  return f.thenRun(a);
# Line 521 | Line 650 | public class CompletableFutureTest exten
650              }
651          },
652  
653 <        DEFAULT_ASYNC {
653 >        ASYNC {
654 >            public void checkExecutionMode() {
655 >                assertEquals(defaultExecutorIsCommonPool,
656 >                             (ForkJoinPool.commonPool() == ForkJoinTask.getPool()));
657 >            }
658 >            public CompletableFuture<Void> runAsync(Runnable a) {
659 >                return CompletableFuture.runAsync(a);
660 >            }
661 >            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
662 >                return CompletableFuture.supplyAsync(a);
663 >            }
664              public <T> CompletableFuture<Void> thenRun
665                  (CompletableFuture<T> f, Runnable a) {
666                  return f.thenRunAsync(a);
# Line 586 | Line 725 | public class CompletableFutureTest exten
725          },
726  
727          EXECUTOR {
728 +            public void checkExecutionMode() {
729 +                assertTrue(ThreadExecutor.startedCurrentThread());
730 +            }
731 +            public CompletableFuture<Void> runAsync(Runnable a) {
732 +                return CompletableFuture.runAsync(a, new ThreadExecutor());
733 +            }
734 +            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
735 +                return CompletableFuture.supplyAsync(a, new ThreadExecutor());
736 +            }
737              public <T> CompletableFuture<Void> thenRun
738                  (CompletableFuture<T> f, Runnable a) {
739                  return f.thenRunAsync(a, new ThreadExecutor());
# Line 649 | Line 797 | public class CompletableFutureTest exten
797              }
798          };
799  
800 +        public abstract void checkExecutionMode();
801 +        public abstract CompletableFuture<Void> runAsync(Runnable a);
802 +        public abstract <U> CompletableFuture<U> supplyAsync(Supplier<U> a);
803          public abstract <T> CompletableFuture<Void> thenRun
804              (CompletableFuture<T> f, Runnable a);
805          public abstract <T> CompletableFuture<Void> thenAccept
# Line 698 | Line 849 | public class CompletableFutureTest exten
849      {
850          final AtomicInteger a = new AtomicInteger(0);
851          final CompletableFuture<Integer> f = new CompletableFuture<>();
852 <        if (!createIncomplete) f.complete(v1);
852 >        if (!createIncomplete) assertTrue(f.complete(v1));
853          final CompletableFuture<Integer> g = f.exceptionally
854              ((Throwable t) -> {
704                // Should not be called
855                  a.getAndIncrement();
856 <                throw new AssertionError();
856 >                threadFail("should not be called");
857 >                return null;            // unreached
858              });
859 <        if (createIncomplete) f.complete(v1);
859 >        if (createIncomplete) assertTrue(f.complete(v1));
860  
861          checkCompletedNormally(g, v1);
862          checkCompletedNormally(f, v1);
863          assertEquals(0, a.get());
864      }}
865  
715
866      /**
867       * exceptionally action completes with function value on source
868       * exception
# Line 727 | Line 877 | public class CompletableFutureTest exten
877          if (!createIncomplete) f.completeExceptionally(ex);
878          final CompletableFuture<Integer> g = f.exceptionally
879              ((Throwable t) -> {
880 +                ExecutionMode.SYNC.checkExecutionMode();
881                  threadAssertSame(t, ex);
882                  a.getAndIncrement();
883                  return v1;
# Line 737 | Line 888 | public class CompletableFutureTest exten
888          assertEquals(1, a.get());
889      }}
890  
891 +    /**
892 +     * If an "exceptionally action" throws an exception, it completes
893 +     * exceptionally with that exception
894 +     */
895      public void testExceptionally_exceptionalCompletionActionFailed() {
896          for (boolean createIncomplete : new boolean[] { true, false })
742        for (Integer v1 : new Integer[] { 1, null })
897      {
898          final AtomicInteger a = new AtomicInteger(0);
899          final CFException ex1 = new CFException();
# Line 748 | Line 902 | public class CompletableFutureTest exten
902          if (!createIncomplete) f.completeExceptionally(ex1);
903          final CompletableFuture<Integer> g = f.exceptionally
904              ((Throwable t) -> {
905 +                ExecutionMode.SYNC.checkExecutionMode();
906                  threadAssertSame(t, ex1);
907                  a.getAndIncrement();
908                  throw ex2;
909              });
910          if (createIncomplete) f.completeExceptionally(ex1);
911  
912 <        checkCompletedWithWrappedCFException(g, ex2);
912 >        checkCompletedWithWrappedException(g, ex2);
913 >        checkCompletedExceptionally(f, ex1);
914          assertEquals(1, a.get());
915      }}
916  
917      /**
918 <     * handle action completes normally with function value on normal
919 <     * completion of source
918 >     * whenComplete action executes on normal completion, propagating
919 >     * source result.
920       */
921 <    public void testHandle_normalCompletion() {
921 >    public void testWhenComplete_normalCompletion() {
922          for (ExecutionMode m : ExecutionMode.values())
923          for (boolean createIncomplete : new boolean[] { true, false })
924          for (Integer v1 : new Integer[] { 1, null })
925      {
770        final CompletableFuture<Integer> f = new CompletableFuture<>();
926          final AtomicInteger a = new AtomicInteger(0);
927 <        if (!createIncomplete) f.complete(v1);
928 <        final CompletableFuture<Integer> g = m.handle
927 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
928 >        if (!createIncomplete) assertTrue(f.complete(v1));
929 >        final CompletableFuture<Integer> g = m.whenComplete
930              (f,
931 <             (Integer x, Throwable t) -> {
932 <                threadAssertSame(x, v1);
931 >             (Integer result, Throwable t) -> {
932 >                m.checkExecutionMode();
933 >                threadAssertSame(result, v1);
934                  threadAssertNull(t);
935                  a.getAndIncrement();
779                return inc(v1);
936              });
937 <        if (createIncomplete) f.complete(v1);
937 >        if (createIncomplete) assertTrue(f.complete(v1));
938  
939 <        checkCompletedNormally(g, inc(v1));
939 >        checkCompletedNormally(g, v1);
940          checkCompletedNormally(f, v1);
941          assertEquals(1, a.get());
942      }}
943  
944      /**
945 <     * handle action completes normally with function value on
946 <     * exceptional completion of source
945 >     * whenComplete action executes on exceptional completion, propagating
946 >     * source result.
947       */
948 <    public void testHandle_exceptionalCompletion() {
948 >    public void testWhenComplete_exceptionalCompletion() {
949          for (ExecutionMode m : ExecutionMode.values())
950          for (boolean createIncomplete : new boolean[] { true, false })
795        for (Integer v1 : new Integer[] { 1, null })
951      {
797        final CompletableFuture<Integer> f = new CompletableFuture<>();
952          final AtomicInteger a = new AtomicInteger(0);
953          final CFException ex = new CFException();
954 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
955          if (!createIncomplete) f.completeExceptionally(ex);
956 <        final CompletableFuture<Integer> g = m.handle
956 >        final CompletableFuture<Integer> g = m.whenComplete
957              (f,
958 <             (Integer x, Throwable t) -> {
959 <                threadAssertNull(x);
958 >             (Integer result, Throwable t) -> {
959 >                m.checkExecutionMode();
960 >                threadAssertNull(result);
961                  threadAssertSame(t, ex);
962                  a.getAndIncrement();
807                return v1;
963              });
964          if (createIncomplete) f.completeExceptionally(ex);
965  
966 <        checkCompletedNormally(g, v1);
967 <        checkCompletedWithWrappedCFException(f, ex);
966 >        checkCompletedWithWrappedException(g, ex);
967 >        checkCompletedExceptionally(f, ex);
968          assertEquals(1, a.get());
969      }}
970  
971      /**
972 <     * handle action completes normally with function value on
973 <     * cancelled source
972 >     * whenComplete action executes on cancelled source, propagating
973 >     * CancellationException.
974       */
975 <    public void testHandle_sourceCancelled() {
975 >    public void testWhenComplete_sourceCancelled() {
976          for (ExecutionMode m : ExecutionMode.values())
977          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
978          for (boolean createIncomplete : new boolean[] { true, false })
824        for (Integer v1 : new Integer[] { 1, null })
979      {
826        final CompletableFuture<Integer> f = new CompletableFuture<>();
980          final AtomicInteger a = new AtomicInteger(0);
981 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
982          if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
983 <        final CompletableFuture<Integer> g = m.handle
983 >        final CompletableFuture<Integer> g = m.whenComplete
984              (f,
985 <             (Integer x, Throwable t) -> {
986 <                threadAssertNull(x);
985 >             (Integer result, Throwable t) -> {
986 >                m.checkExecutionMode();
987 >                threadAssertNull(result);
988                  threadAssertTrue(t instanceof CancellationException);
989                  a.getAndIncrement();
835                return v1;
990              });
991          if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
992  
993 <        checkCompletedNormally(g, v1);
993 >        checkCompletedWithWrappedCancellationException(g);
994          checkCancelled(f);
995          assertEquals(1, a.get());
996      }}
997  
998      /**
999 <     * handle result completes exceptionally if action does
999 >     * If a whenComplete action throws an exception when triggered by
1000 >     * a normal completion, it completes exceptionally
1001       */
1002 <    public void testHandle_sourceFailedActionFailed() {
848 <        for (ExecutionMode m : ExecutionMode.values())
1002 >    public void testWhenComplete_sourceCompletedNormallyActionFailed() {
1003          for (boolean createIncomplete : new boolean[] { true, false })
1004 +        for (ExecutionMode m : ExecutionMode.values())
1005 +        for (Integer v1 : new Integer[] { 1, null })
1006      {
1007 +        final AtomicInteger a = new AtomicInteger(0);
1008 +        final CFException ex = new CFException();
1009          final CompletableFuture<Integer> f = new CompletableFuture<>();
1010 +        if (!createIncomplete) assertTrue(f.complete(v1));
1011 +        final CompletableFuture<Integer> g = m.whenComplete
1012 +            (f,
1013 +             (Integer result, Throwable t) -> {
1014 +                m.checkExecutionMode();
1015 +                threadAssertSame(result, v1);
1016 +                threadAssertNull(t);
1017 +                a.getAndIncrement();
1018 +                throw ex;
1019 +            });
1020 +        if (createIncomplete) assertTrue(f.complete(v1));
1021 +
1022 +        checkCompletedWithWrappedException(g, ex);
1023 +        checkCompletedNormally(f, v1);
1024 +        assertEquals(1, a.get());
1025 +    }}
1026 +
1027 +    /**
1028 +     * If a whenComplete action throws an exception when triggered by
1029 +     * a source completion that also throws an exception, the source
1030 +     * exception takes precedence (unlike handle)
1031 +     */
1032 +    public void testWhenComplete_sourceFailedActionFailed() {
1033 +        for (boolean createIncomplete : new boolean[] { true, false })
1034 +        for (ExecutionMode m : ExecutionMode.values())
1035 +    {
1036          final AtomicInteger a = new AtomicInteger(0);
1037          final CFException ex1 = new CFException();
1038          final CFException ex2 = new CFException();
1039 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1040 +
1041          if (!createIncomplete) f.completeExceptionally(ex1);
1042 <        final CompletableFuture<Integer> g = m.handle
1042 >        final CompletableFuture<Integer> g = m.whenComplete
1043              (f,
1044 <             (Integer x, Throwable t) -> {
1045 <                threadAssertNull(x);
1046 <                threadAssertSame(ex1, t);
1044 >             (Integer result, Throwable t) -> {
1045 >                m.checkExecutionMode();
1046 >                threadAssertSame(t, ex1);
1047 >                threadAssertNull(result);
1048                  a.getAndIncrement();
1049                  throw ex2;
1050              });
1051          if (createIncomplete) f.completeExceptionally(ex1);
1052  
1053 <        checkCompletedWithWrappedCFException(g, ex2);
1054 <        checkCompletedWithWrappedCFException(f, ex1);
1053 >        checkCompletedWithWrappedException(g, ex1);
1054 >        checkCompletedExceptionally(f, ex1);
1055 >        if (testImplementationDetails) {
1056 >            assertEquals(1, ex1.getSuppressed().length);
1057 >            assertSame(ex2, ex1.getSuppressed()[0]);
1058 >        }
1059          assertEquals(1, a.get());
1060      }}
1061  
1062 <    public void testHandle_sourceCompletedNormallyActionFailed() {
1062 >    /**
1063 >     * handle action completes normally with function value on normal
1064 >     * completion of source
1065 >     */
1066 >    public void testHandle_normalCompletion() {
1067          for (ExecutionMode m : ExecutionMode.values())
1068          for (boolean createIncomplete : new boolean[] { true, false })
1069          for (Integer v1 : new Integer[] { 1, null })
1070      {
1071          final CompletableFuture<Integer> f = new CompletableFuture<>();
1072          final AtomicInteger a = new AtomicInteger(0);
1073 <        final CFException ex = new CFException();
879 <        if (!createIncomplete) f.complete(v1);
1073 >        if (!createIncomplete) assertTrue(f.complete(v1));
1074          final CompletableFuture<Integer> g = m.handle
1075              (f,
1076 <             (Integer x, Throwable t) -> {
1077 <                threadAssertSame(x, v1);
1076 >             (Integer result, Throwable t) -> {
1077 >                m.checkExecutionMode();
1078 >                threadAssertSame(result, v1);
1079                  threadAssertNull(t);
1080                  a.getAndIncrement();
1081 <                throw ex;
1081 >                return inc(v1);
1082              });
1083 <        if (createIncomplete) f.complete(v1);
1083 >        if (createIncomplete) assertTrue(f.complete(v1));
1084  
1085 <        checkCompletedWithWrappedCFException(g, ex);
1085 >        checkCompletedNormally(g, inc(v1));
1086          checkCompletedNormally(f, v1);
1087          assertEquals(1, a.get());
1088      }}
1089  
1090      /**
1091 <     * runAsync completes after running Runnable
1092 <     */
898 <    public void testRunAsync() {
899 <        Noop r = new Noop();
900 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r);
901 <        assertNull(f.join());
902 <        assertEquals(1, r.invocationCount);
903 <        checkCompletedNormally(f, null);
904 <    }
905 <
906 <    /**
907 <     * runAsync with executor completes after running Runnable
908 <     */
909 <    public void testRunAsync2() {
910 <        Noop r = new Noop();
911 <        ThreadExecutor exec = new ThreadExecutor();
912 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r, exec);
913 <        assertNull(f.join());
914 <        assertEquals(1, r.invocationCount);
915 <        checkCompletedNormally(f, null);
916 <        assertEquals(1, exec.count.get());
917 <    }
918 <
919 <    /**
920 <     * failing runAsync completes exceptionally after running Runnable
921 <     */
922 <    public void testRunAsync3() {
923 <        FailingNoop r = new FailingNoop();
924 <        CompletableFuture<Void> f = CompletableFuture.runAsync(r);
925 <        checkCompletedWithWrappedCFException(f);
926 <        assertEquals(1, r.invocationCount);
927 <    }
928 <
929 <    /**
930 <     * supplyAsync completes with result of supplier
931 <     */
932 <    public void testSupplyAsync() {
933 <        CompletableFuture<Integer> f;
934 <        f = CompletableFuture.supplyAsync(supplyOne);
935 <        assertEquals(f.join(), one);
936 <        checkCompletedNormally(f, one);
937 <    }
938 <
939 <    /**
940 <     * supplyAsync with executor completes with result of supplier
941 <     */
942 <    public void testSupplyAsync2() {
943 <        CompletableFuture<Integer> f;
944 <        f = CompletableFuture.supplyAsync(supplyOne, new ThreadExecutor());
945 <        assertEquals(f.join(), one);
946 <        checkCompletedNormally(f, one);
947 <    }
948 <
949 <    /**
950 <     * Failing supplyAsync completes exceptionally
951 <     */
952 <    public void testSupplyAsync3() {
953 <        FailingSupplier r = new FailingSupplier();
954 <        CompletableFuture<Integer> f = CompletableFuture.supplyAsync(r);
955 <        checkCompletedWithWrappedCFException(f);
956 <        assertEquals(1, r.invocationCount);
957 <    }
958 <
959 <    // seq completion methods
960 <
961 <    /**
962 <     * thenRun result completes normally after normal completion of source
963 <     */
964 <    public void testThenRun() {
965 <        CompletableFuture<Integer> f;
966 <        CompletableFuture<Void> g;
967 <        Noop r;
968 <
969 <        f = new CompletableFuture<>();
970 <        g = f.thenRun(r = new Noop());
971 <        f.complete(null);
972 <        checkCompletedNormally(g, null);
973 <        assertEquals(1, r.invocationCount);
974 <
975 <        f = new CompletableFuture<>();
976 <        f.complete(null);
977 <        g = f.thenRun(r = new Noop());
978 <        checkCompletedNormally(g, null);
979 <        assertEquals(1, r.invocationCount);
980 <    }
981 <
982 <    /**
983 <     * thenRun result completes exceptionally after exceptional
984 <     * completion of source
985 <     */
986 <    public void testThenRun2() {
987 <        CompletableFuture<Integer> f;
988 <        CompletableFuture<Void> g;
989 <        Noop r;
990 <
991 <        f = new CompletableFuture<>();
992 <        g = f.thenRun(r = new Noop());
993 <        f.completeExceptionally(new CFException());
994 <        checkCompletedWithWrappedCFException(g);
995 <        assertEquals(0, r.invocationCount);
996 <
997 <        f = new CompletableFuture<>();
998 <        f.completeExceptionally(new CFException());
999 <        g = f.thenRun(r = new Noop());
1000 <        checkCompletedWithWrappedCFException(g);
1001 <        assertEquals(0, r.invocationCount);
1002 <    }
1003 <
1004 <    /**
1005 <     * thenRun result completes exceptionally if action does
1006 <     */
1007 <    public void testThenRun3() {
1008 <        CompletableFuture<Integer> f;
1009 <        CompletableFuture<Void> g;
1010 <        FailingNoop r;
1011 <
1012 <        f = new CompletableFuture<>();
1013 <        g = f.thenRun(r = new FailingNoop());
1014 <        f.complete(null);
1015 <        checkCompletedWithWrappedCFException(g);
1016 <
1017 <        f = new CompletableFuture<>();
1018 <        f.complete(null);
1019 <        g = f.thenRun(r = new FailingNoop());
1020 <        checkCompletedWithWrappedCFException(g);
1021 <    }
1022 <
1023 <    /**
1024 <     * thenRun result completes exceptionally if source cancelled
1025 <     */
1026 <    public void testThenRun4() {
1027 <        CompletableFuture<Integer> f;
1028 <        CompletableFuture<Void> g;
1029 <        Noop r;
1030 <
1031 <        f = new CompletableFuture<>();
1032 <        g = f.thenRun(r = new Noop());
1033 <        assertTrue(f.cancel(true));
1034 <        checkCompletedWithWrappedCancellationException(g);
1035 <
1036 <        f = new CompletableFuture<>();
1037 <        assertTrue(f.cancel(true));
1038 <        g = f.thenRun(r = new Noop());
1039 <        checkCompletedWithWrappedCancellationException(g);
1040 <    }
1041 <
1042 <    /**
1043 <     * thenApply result completes normally after normal completion of source
1044 <     */
1045 <    public void testThenApply() {
1046 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1047 <        CompletableFuture<Integer> g = f.thenApply(inc);
1048 <        f.complete(one);
1049 <        checkCompletedNormally(g, two);
1050 <    }
1051 <
1052 <    /**
1053 <     * thenApply result completes exceptionally after exceptional
1054 <     * completion of source
1055 <     */
1056 <    public void testThenApply2() {
1057 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1058 <        CompletableFuture<Integer> g = f.thenApply(inc);
1059 <        f.completeExceptionally(new CFException());
1060 <        checkCompletedWithWrappedCFException(g);
1061 <    }
1062 <
1063 <    /**
1064 <     * thenApply result completes exceptionally if action does
1065 <     */
1066 <    public void testThenApply3() {
1067 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1068 <        CompletableFuture<Integer> g = f.thenApply(new FailingFunction());
1069 <        f.complete(one);
1070 <        checkCompletedWithWrappedCFException(g);
1071 <    }
1072 <
1073 <    /**
1074 <     * thenApply result completes exceptionally if source cancelled
1075 <     */
1076 <    public void testThenApply4() {
1077 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1078 <        CompletableFuture<Integer> g = f.thenApply(inc);
1079 <        assertTrue(f.cancel(true));
1080 <        checkCompletedWithWrappedCancellationException(g);
1081 <    }
1082 <
1083 <    /**
1084 <     * thenAccept result completes normally after normal completion of source
1085 <     */
1086 <    public void testThenAccept() {
1087 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1088 <        IncAction r = new IncAction();
1089 <        CompletableFuture<Void> g = f.thenAccept(r);
1090 <        f.complete(one);
1091 <        checkCompletedNormally(g, null);
1092 <        assertEquals(r.value, (Integer) 2);
1093 <    }
1094 <
1095 <    /**
1096 <     * thenAccept result completes exceptionally after exceptional
1097 <     * completion of source
1098 <     */
1099 <    public void testThenAccept2() {
1100 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1101 <        IncAction r = new IncAction();
1102 <        CompletableFuture<Void> g = f.thenAccept(r);
1103 <        f.completeExceptionally(new CFException());
1104 <        checkCompletedWithWrappedCFException(g);
1105 <    }
1106 <
1107 <    /**
1108 <     * thenAccept result completes exceptionally if action does
1109 <     */
1110 <    public void testThenAccept3() {
1111 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1112 <        FailingConsumer r = new FailingConsumer();
1113 <        CompletableFuture<Void> g = f.thenAccept(r);
1114 <        f.complete(one);
1115 <        checkCompletedWithWrappedCFException(g);
1116 <        assertEquals(1, r.invocationCount);
1117 <    }
1118 <
1119 <    /**
1120 <     * thenAccept result completes exceptionally if source cancelled
1121 <     */
1122 <    public void testThenAccept4() {
1123 <        CompletableFuture<Integer> f = new CompletableFuture<>();
1124 <        IncAction r = new IncAction();
1125 <        CompletableFuture<Void> g = f.thenAccept(r);
1126 <        assertTrue(f.cancel(true));
1127 <        checkCompletedWithWrappedCancellationException(g);
1128 <    }
1129 <
1130 <    /**
1131 <     * thenCombine result completes normally after normal completion
1132 <     * of sources
1091 >     * handle action completes normally with function value on
1092 >     * exceptional completion of source
1093       */
1094 <    public void testThenCombine_normalCompletion1() {
1135 <        for (boolean createIncomplete : new boolean[] { true, false })
1136 <        for (boolean fFirst : new boolean[] { true, false })
1094 >    public void testHandle_exceptionalCompletion() {
1095          for (ExecutionMode m : ExecutionMode.values())
1096 +        for (boolean createIncomplete : new boolean[] { true, false })
1097          for (Integer v1 : new Integer[] { 1, null })
1139        for (Integer v2 : new Integer[] { 2, null })
1098      {
1099          final CompletableFuture<Integer> f = new CompletableFuture<>();
1100 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1101 <        final SubtractFunction r = new SubtractFunction();
1102 <        CompletableFuture<Integer> h = null;
1103 <        if (createIncomplete) h = m.thenCombine(f, g, r);
1104 <
1105 <        if (fFirst)
1106 <            f.complete(v1);
1107 <        else
1108 <            g.complete(v2);
1109 <        if (createIncomplete) checkIncomplete(h);
1110 <        assertEquals(0, r.invocationCount);
1111 <        if (!fFirst)
1112 <            f.complete(v1);
1155 <        else
1156 <            g.complete(v2);
1157 <        if (!createIncomplete) h = m.thenCombine(f, g, r);
1100 >        final AtomicInteger a = new AtomicInteger(0);
1101 >        final CFException ex = new CFException();
1102 >        if (!createIncomplete) f.completeExceptionally(ex);
1103 >        final CompletableFuture<Integer> g = m.handle
1104 >            (f,
1105 >             (Integer result, Throwable t) -> {
1106 >                m.checkExecutionMode();
1107 >                threadAssertNull(result);
1108 >                threadAssertSame(t, ex);
1109 >                a.getAndIncrement();
1110 >                return v1;
1111 >            });
1112 >        if (createIncomplete) f.completeExceptionally(ex);
1113  
1114 <        checkCompletedNormally(h, subtract(v1, v2));
1115 <        checkCompletedNormally(f, v1);
1116 <        checkCompletedNormally(g, v2);
1162 <        assertEquals(1, r.invocationCount);
1114 >        checkCompletedNormally(g, v1);
1115 >        checkCompletedExceptionally(f, ex);
1116 >        assertEquals(1, a.get());
1117      }}
1118  
1119      /**
1120 <     * thenCombine result completes exceptionally after exceptional
1121 <     * completion of either source
1120 >     * handle action completes normally with function value on
1121 >     * cancelled source
1122       */
1123 <    public void testThenCombine_exceptionalCompletion1() {
1123 >    public void testHandle_sourceCancelled() {
1124          for (ExecutionMode m : ExecutionMode.values())
1125 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1126 +        for (boolean createIncomplete : new boolean[] { true, false })
1127          for (Integer v1 : new Integer[] { 1, null })
1128      {
1129          final CompletableFuture<Integer> f = new CompletableFuture<>();
1130 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1131 <        final SubtractFunction r = new SubtractFunction();
1132 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1133 <        final CFException ex = new CFException();
1134 <
1135 <        f.completeExceptionally(ex);
1136 <        checkIncomplete(h);
1137 <        g.complete(v1);
1130 >        final AtomicInteger a = new AtomicInteger(0);
1131 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1132 >        final CompletableFuture<Integer> g = m.handle
1133 >            (f,
1134 >             (Integer result, Throwable t) -> {
1135 >                m.checkExecutionMode();
1136 >                threadAssertNull(result);
1137 >                threadAssertTrue(t instanceof CancellationException);
1138 >                a.getAndIncrement();
1139 >                return v1;
1140 >            });
1141 >        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1142  
1183        checkCompletedWithWrappedCFException(h, ex);
1184        checkCompletedWithWrappedCFException(f, ex);
1185        assertEquals(0, r.invocationCount);
1143          checkCompletedNormally(g, v1);
1144 +        checkCancelled(f);
1145 +        assertEquals(1, a.get());
1146      }}
1147  
1148 <    public void testThenCombine_exceptionalCompletion2() {
1148 >    /**
1149 >     * If a "handle action" throws an exception when triggered by
1150 >     * a normal completion, it completes exceptionally
1151 >     */
1152 >    public void testHandle_sourceCompletedNormallyActionFailed() {
1153          for (ExecutionMode m : ExecutionMode.values())
1154 +        for (boolean createIncomplete : new boolean[] { true, false })
1155          for (Integer v1 : new Integer[] { 1, null })
1156      {
1157          final CompletableFuture<Integer> f = new CompletableFuture<>();
1158 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1195 <        final SubtractFunction r = new SubtractFunction();
1196 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1158 >        final AtomicInteger a = new AtomicInteger(0);
1159          final CFException ex = new CFException();
1160 +        if (!createIncomplete) assertTrue(f.complete(v1));
1161 +        final CompletableFuture<Integer> g = m.handle
1162 +            (f,
1163 +             (Integer result, Throwable t) -> {
1164 +                m.checkExecutionMode();
1165 +                threadAssertSame(result, v1);
1166 +                threadAssertNull(t);
1167 +                a.getAndIncrement();
1168 +                throw ex;
1169 +            });
1170 +        if (createIncomplete) assertTrue(f.complete(v1));
1171  
1172 <        g.completeExceptionally(ex);
1200 <        checkIncomplete(h);
1201 <        f.complete(v1);
1202 <
1203 <        checkCompletedWithWrappedCFException(h, ex);
1204 <        checkCompletedWithWrappedCFException(g, ex);
1205 <        assertEquals(0, r.invocationCount);
1172 >        checkCompletedWithWrappedException(g, ex);
1173          checkCompletedNormally(f, v1);
1174 +        assertEquals(1, a.get());
1175      }}
1176  
1177 <    public void testThenCombine_exceptionalCompletion3() {
1177 >    /**
1178 >     * If a "handle action" throws an exception when triggered by
1179 >     * a source completion that also throws an exception, the action
1180 >     * exception takes precedence (unlike whenComplete)
1181 >     */
1182 >    public void testHandle_sourceFailedActionFailed() {
1183 >        for (boolean createIncomplete : new boolean[] { true, false })
1184          for (ExecutionMode m : ExecutionMode.values())
1211        for (Integer v1 : new Integer[] { 1, null })
1185      {
1186 +        final AtomicInteger a = new AtomicInteger(0);
1187 +        final CFException ex1 = new CFException();
1188 +        final CFException ex2 = new CFException();
1189          final CompletableFuture<Integer> f = new CompletableFuture<>();
1214        final CompletableFuture<Integer> g = new CompletableFuture<>();
1215        final SubtractFunction r = new SubtractFunction();
1216        final CFException ex = new CFException();
1190  
1191 <        g.completeExceptionally(ex);
1192 <        f.complete(v1);
1193 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1191 >        if (!createIncomplete) f.completeExceptionally(ex1);
1192 >        final CompletableFuture<Integer> g = m.handle
1193 >            (f,
1194 >             (Integer result, Throwable t) -> {
1195 >                m.checkExecutionMode();
1196 >                threadAssertNull(result);
1197 >                threadAssertSame(ex1, t);
1198 >                a.getAndIncrement();
1199 >                throw ex2;
1200 >            });
1201 >        if (createIncomplete) f.completeExceptionally(ex1);
1202  
1203 <        checkCompletedWithWrappedCFException(h, ex);
1204 <        checkCompletedWithWrappedCFException(g, ex);
1205 <        assertEquals(0, r.invocationCount);
1225 <        checkCompletedNormally(f, v1);
1203 >        checkCompletedWithWrappedException(g, ex2);
1204 >        checkCompletedExceptionally(f, ex1);
1205 >        assertEquals(1, a.get());
1206      }}
1207  
1208 <    public void testThenCombine_exceptionalCompletion4() {
1209 <        for (ExecutionMode m : ExecutionMode.values())
1210 <        for (Integer v1 : new Integer[] { 1, null })
1208 >    /**
1209 >     * runAsync completes after running Runnable
1210 >     */
1211 >    public void testRunAsync_normalCompletion() {
1212 >        ExecutionMode[] executionModes = {
1213 >            ExecutionMode.ASYNC,
1214 >            ExecutionMode.EXECUTOR,
1215 >        };
1216 >        for (ExecutionMode m : executionModes)
1217      {
1218 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1219 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1220 <        final SubtractFunction r = new SubtractFunction();
1221 <        final CFException ex = new CFException();
1222 <
1237 <        f.completeExceptionally(ex);
1238 <        g.complete(v1);
1239 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1240 <
1241 <        checkCompletedWithWrappedCFException(h, ex);
1242 <        checkCompletedWithWrappedCFException(f, ex);
1243 <        assertEquals(0, r.invocationCount);
1244 <        checkCompletedNormally(g, v1);
1218 >        final Noop r = new Noop(m);
1219 >        final CompletableFuture<Void> f = m.runAsync(r);
1220 >        assertNull(f.join());
1221 >        checkCompletedNormally(f, null);
1222 >        r.assertInvoked();
1223      }}
1224  
1225      /**
1226 <     * thenCombine result completes exceptionally if action does
1226 >     * failing runAsync completes exceptionally after running Runnable
1227       */
1228 <    public void testThenCombine_actionFailed1() {
1229 <        for (ExecutionMode m : ExecutionMode.values())
1230 <        for (Integer v1 : new Integer[] { 1, null })
1231 <        for (Integer v2 : new Integer[] { 2, null })
1228 >    public void testRunAsync_exceptionalCompletion() {
1229 >        ExecutionMode[] executionModes = {
1230 >            ExecutionMode.ASYNC,
1231 >            ExecutionMode.EXECUTOR,
1232 >        };
1233 >        for (ExecutionMode m : executionModes)
1234      {
1235 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1236 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1237 <        final FailingBiFunction r = new FailingBiFunction();
1238 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1235 >        final FailingRunnable r = new FailingRunnable(m);
1236 >        final CompletableFuture<Void> f = m.runAsync(r);
1237 >        checkCompletedWithWrappedException(f, r.ex);
1238 >        r.assertInvoked();
1239 >    }}
1240  
1241 <        f.complete(v1);
1242 <        checkIncomplete(h);
1243 <        g.complete(v2);
1241 >    public void testRunAsync_rejectingExecutor() {
1242 >        CountingRejectingExecutor e = new CountingRejectingExecutor();
1243 >        try {
1244 >            CompletableFuture.runAsync(() -> {}, e);
1245 >            shouldThrow();
1246 >        } catch (Throwable t) {
1247 >            assertSame(e.ex, t);
1248 >        }
1249  
1250 <        checkCompletedWithWrappedCFException(h);
1251 <        checkCompletedNormally(f, v1);
1266 <        checkCompletedNormally(g, v2);
1267 <    }}
1250 >        assertEquals(1, e.count.get());
1251 >    }
1252  
1253 <    public void testThenCombine_actionFailed2() {
1254 <        for (ExecutionMode m : ExecutionMode.values())
1253 >    /**
1254 >     * supplyAsync completes with result of supplier
1255 >     */
1256 >    public void testSupplyAsync_normalCompletion() {
1257 >        ExecutionMode[] executionModes = {
1258 >            ExecutionMode.ASYNC,
1259 >            ExecutionMode.EXECUTOR,
1260 >        };
1261 >        for (ExecutionMode m : executionModes)
1262          for (Integer v1 : new Integer[] { 1, null })
1272        for (Integer v2 : new Integer[] { 2, null })
1263      {
1264 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1265 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1266 <        final FailingBiFunction r = new FailingBiFunction();
1277 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1278 <
1279 <        g.complete(v2);
1280 <        checkIncomplete(h);
1281 <        f.complete(v1);
1282 <
1283 <        checkCompletedWithWrappedCFException(h);
1264 >        final IntegerSupplier r = new IntegerSupplier(m, v1);
1265 >        final CompletableFuture<Integer> f = m.supplyAsync(r);
1266 >        assertSame(v1, f.join());
1267          checkCompletedNormally(f, v1);
1268 <        checkCompletedNormally(g, v2);
1268 >        r.assertInvoked();
1269      }}
1270  
1271      /**
1272 <     * thenCombine result completes exceptionally if either source cancelled
1272 >     * Failing supplyAsync completes exceptionally
1273       */
1274 <    public void testThenCombine_sourceCancelled1() {
1275 <        for (ExecutionMode m : ExecutionMode.values())
1276 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1277 <        for (Integer v1 : new Integer[] { 1, null })
1274 >    public void testSupplyAsync_exceptionalCompletion() {
1275 >        ExecutionMode[] executionModes = {
1276 >            ExecutionMode.ASYNC,
1277 >            ExecutionMode.EXECUTOR,
1278 >        };
1279 >        for (ExecutionMode m : executionModes)
1280      {
1281 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1282 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1283 <        final SubtractFunction r = new SubtractFunction();
1284 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1281 >        FailingSupplier r = new FailingSupplier(m);
1282 >        CompletableFuture<Integer> f = m.supplyAsync(r);
1283 >        checkCompletedWithWrappedException(f, r.ex);
1284 >        r.assertInvoked();
1285 >    }}
1286  
1287 <        assertTrue(f.cancel(mayInterruptIfRunning));
1288 <        checkIncomplete(h);
1289 <        g.complete(v1);
1287 >    public void testSupplyAsync_rejectingExecutor() {
1288 >        CountingRejectingExecutor e = new CountingRejectingExecutor();
1289 >        try {
1290 >            CompletableFuture.supplyAsync(() -> null, e);
1291 >            shouldThrow();
1292 >        } catch (Throwable t) {
1293 >            assertSame(e.ex, t);
1294 >        }
1295  
1296 <        checkCompletedWithWrappedCancellationException(h);
1297 <        checkCancelled(f);
1307 <        assertEquals(0, r.invocationCount);
1308 <        checkCompletedNormally(g, v1);
1309 <    }}
1296 >        assertEquals(1, e.count.get());
1297 >    }
1298  
1299 <    public void testThenCombine_sourceCancelled2() {
1299 >    // seq completion methods
1300 >
1301 >    /**
1302 >     * thenRun result completes normally after normal completion of source
1303 >     */
1304 >    public void testThenRun_normalCompletion() {
1305          for (ExecutionMode m : ExecutionMode.values())
1313        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1306          for (Integer v1 : new Integer[] { 1, null })
1307      {
1308          final CompletableFuture<Integer> f = new CompletableFuture<>();
1309 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1310 <        final SubtractFunction r = new SubtractFunction();
1319 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1309 >        final Noop[] rs = new Noop[6];
1310 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1311  
1312 <        assertTrue(g.cancel(mayInterruptIfRunning));
1313 <        checkIncomplete(h);
1314 <        f.complete(v1);
1312 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1313 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1314 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1315 >        checkIncomplete(h0);
1316 >        checkIncomplete(h1);
1317 >        checkIncomplete(h2);
1318 >        assertTrue(f.complete(v1));
1319 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1320 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1321 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1322  
1323 <        checkCompletedWithWrappedCancellationException(h);
1324 <        checkCancelled(g);
1325 <        assertEquals(0, r.invocationCount);
1323 >        checkCompletedNormally(h0, null);
1324 >        checkCompletedNormally(h1, null);
1325 >        checkCompletedNormally(h2, null);
1326 >        checkCompletedNormally(h3, null);
1327 >        checkCompletedNormally(h4, null);
1328 >        checkCompletedNormally(h5, null);
1329          checkCompletedNormally(f, v1);
1330 +        for (Noop r : rs) r.assertInvoked();
1331      }}
1332  
1333 <    public void testThenCombine_sourceCancelled3() {
1333 >    /**
1334 >     * thenRun result completes exceptionally after exceptional
1335 >     * completion of source
1336 >     */
1337 >    public void testThenRun_exceptionalCompletion() {
1338          for (ExecutionMode m : ExecutionMode.values())
1333        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1334        for (Integer v1 : new Integer[] { 1, null })
1339      {
1340 +        final CFException ex = new CFException();
1341          final CompletableFuture<Integer> f = new CompletableFuture<>();
1342 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1343 <        final SubtractFunction r = new SubtractFunction();
1339 <
1340 <        assertTrue(g.cancel(mayInterruptIfRunning));
1341 <        f.complete(v1);
1342 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1342 >        final Noop[] rs = new Noop[6];
1343 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1344  
1345 <        checkCompletedWithWrappedCancellationException(h);
1346 <        checkCancelled(g);
1347 <        assertEquals(0, r.invocationCount);
1348 <        checkCompletedNormally(f, v1);
1345 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1346 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1347 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1348 >        checkIncomplete(h0);
1349 >        checkIncomplete(h1);
1350 >        checkIncomplete(h2);
1351 >        assertTrue(f.completeExceptionally(ex));
1352 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1353 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1354 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1355 >
1356 >        checkCompletedWithWrappedException(h0, ex);
1357 >        checkCompletedWithWrappedException(h1, ex);
1358 >        checkCompletedWithWrappedException(h2, ex);
1359 >        checkCompletedWithWrappedException(h3, ex);
1360 >        checkCompletedWithWrappedException(h4, ex);
1361 >        checkCompletedWithWrappedException(h5, ex);
1362 >        checkCompletedExceptionally(f, ex);
1363 >        for (Noop r : rs) r.assertNotInvoked();
1364      }}
1365  
1366 <    public void testThenCombine_sourceCancelled4() {
1366 >    /**
1367 >     * thenRun result completes exceptionally if source cancelled
1368 >     */
1369 >    public void testThenRun_sourceCancelled() {
1370          for (ExecutionMode m : ExecutionMode.values())
1371          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1353        for (Integer v1 : new Integer[] { 1, null })
1372      {
1373          final CompletableFuture<Integer> f = new CompletableFuture<>();
1374 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1375 <        final SubtractFunction r = new SubtractFunction();
1374 >        final Noop[] rs = new Noop[6];
1375 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1376  
1377 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1378 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1379 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1380 +        checkIncomplete(h0);
1381 +        checkIncomplete(h1);
1382 +        checkIncomplete(h2);
1383          assertTrue(f.cancel(mayInterruptIfRunning));
1384 <        g.complete(v1);
1385 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1386 <
1387 <        checkCompletedWithWrappedCancellationException(h);
1384 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1385 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1386 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1387 >
1388 >        checkCompletedWithWrappedCancellationException(h0);
1389 >        checkCompletedWithWrappedCancellationException(h1);
1390 >        checkCompletedWithWrappedCancellationException(h2);
1391 >        checkCompletedWithWrappedCancellationException(h3);
1392 >        checkCompletedWithWrappedCancellationException(h4);
1393 >        checkCompletedWithWrappedCancellationException(h5);
1394          checkCancelled(f);
1395 <        assertEquals(0, r.invocationCount);
1366 <        checkCompletedNormally(g, v1);
1395 >        for (Noop r : rs) r.assertNotInvoked();
1396      }}
1397  
1398      /**
1399 <     * thenAcceptBoth result completes normally after normal
1371 <     * completion of sources
1399 >     * thenRun result completes exceptionally if action does
1400       */
1401 <    public void testThenAcceptBoth_normalCompletion1() {
1374 <        for (ExecutionMode m : ExecutionMode.values())
1375 <        for (Integer v1 : new Integer[] { 1, null })
1376 <        for (Integer v2 : new Integer[] { 2, null })
1377 <    {
1378 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1379 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1380 <        final SubtractAction r = new SubtractAction();
1381 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1382 <
1383 <        f.complete(v1);
1384 <        checkIncomplete(h);
1385 <        assertEquals(0, r.invocationCount);
1386 <        g.complete(v2);
1387 <
1388 <        checkCompletedNormally(h, null);
1389 <        assertEquals(subtract(v1, v2), r.value);
1390 <        checkCompletedNormally(f, v1);
1391 <        checkCompletedNormally(g, v2);
1392 <    }}
1393 <
1394 <    public void testThenAcceptBoth_normalCompletion2() {
1401 >    public void testThenRun_actionFailed() {
1402          for (ExecutionMode m : ExecutionMode.values())
1403          for (Integer v1 : new Integer[] { 1, null })
1397        for (Integer v2 : new Integer[] { 2, null })
1404      {
1405          final CompletableFuture<Integer> f = new CompletableFuture<>();
1406 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1407 <        final SubtractAction r = new SubtractAction();
1402 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1406 >        final FailingRunnable[] rs = new FailingRunnable[6];
1407 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
1408  
1409 <        g.complete(v2);
1410 <        checkIncomplete(h);
1411 <        assertEquals(0, r.invocationCount);
1412 <        f.complete(v1);
1409 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1410 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1411 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1412 >        assertTrue(f.complete(v1));
1413 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1414 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1415 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1416  
1417 <        checkCompletedNormally(h, null);
1418 <        assertEquals(subtract(v1, v2), r.value);
1417 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1418 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1419 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1420 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1421 >        checkCompletedWithWrappedException(h4, rs[4].ex);
1422 >        checkCompletedWithWrappedException(h5, rs[5].ex);
1423          checkCompletedNormally(f, v1);
1412        checkCompletedNormally(g, v2);
1424      }}
1425  
1426 <    public void testThenAcceptBoth_normalCompletion3() {
1427 <        for (ExecutionMode m : ExecutionMode.values())
1428 <        for (Integer v1 : new Integer[] { 1, null })
1429 <        for (Integer v2 : new Integer[] { 2, null })
1419 <    {
1420 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1421 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1422 <        final SubtractAction r = new SubtractAction();
1423 <
1424 <        g.complete(v2);
1425 <        f.complete(v1);
1426 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1427 <
1428 <        checkCompletedNormally(h, null);
1429 <        assertEquals(subtract(v1, v2), r.value);
1430 <        checkCompletedNormally(f, v1);
1431 <        checkCompletedNormally(g, v2);
1432 <    }}
1433 <
1434 <    public void testThenAcceptBoth_normalCompletion4() {
1426 >    /**
1427 >     * thenApply result completes normally after normal completion of source
1428 >     */
1429 >    public void testThenApply_normalCompletion() {
1430          for (ExecutionMode m : ExecutionMode.values())
1431          for (Integer v1 : new Integer[] { 1, null })
1437        for (Integer v2 : new Integer[] { 2, null })
1432      {
1433          final CompletableFuture<Integer> f = new CompletableFuture<>();
1434 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1435 <        final SubtractAction r = new SubtractAction();
1434 >        final IncFunction[] rs = new IncFunction[4];
1435 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1436  
1437 <        f.complete(v1);
1438 <        g.complete(v2);
1439 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1437 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1438 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1439 >        checkIncomplete(h0);
1440 >        checkIncomplete(h1);
1441 >        assertTrue(f.complete(v1));
1442 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1443 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1444  
1445 <        checkCompletedNormally(h, null);
1446 <        assertEquals(subtract(v1, v2), r.value);
1445 >        checkCompletedNormally(h0, inc(v1));
1446 >        checkCompletedNormally(h1, inc(v1));
1447 >        checkCompletedNormally(h2, inc(v1));
1448 >        checkCompletedNormally(h3, inc(v1));
1449          checkCompletedNormally(f, v1);
1450 <        checkCompletedNormally(g, v2);
1450 >        for (IncFunction r : rs) r.assertValue(inc(v1));
1451      }}
1452  
1453      /**
1454 <     * thenAcceptBoth result completes exceptionally after exceptional
1455 <     * completion of either source
1454 >     * thenApply result completes exceptionally after exceptional
1455 >     * completion of source
1456       */
1457 <    public void testThenAcceptBoth_exceptionalCompletion1() {
1457 >    public void testThenApply_exceptionalCompletion() {
1458          for (ExecutionMode m : ExecutionMode.values())
1459        for (Integer v1 : new Integer[] { 1, null })
1459      {
1461        final CompletableFuture<Integer> f = new CompletableFuture<>();
1462        final CompletableFuture<Integer> g = new CompletableFuture<>();
1463        final SubtractAction r = new SubtractAction();
1464        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1460          final CFException ex = new CFException();
1466
1467        f.completeExceptionally(ex);
1468        checkIncomplete(h);
1469        g.complete(v1);
1470
1471        checkCompletedWithWrappedCFException(h, ex);
1472        checkCompletedWithWrappedCFException(f, ex);
1473        assertEquals(0, r.invocationCount);
1474        checkCompletedNormally(g, v1);
1475    }}
1476
1477    public void testThenAcceptBoth_exceptionalCompletion2() {
1478        for (ExecutionMode m : ExecutionMode.values())
1479        for (Integer v1 : new Integer[] { 1, null })
1480    {
1461          final CompletableFuture<Integer> f = new CompletableFuture<>();
1462 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1463 <        final SubtractAction r = new SubtractAction();
1484 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1485 <        final CFException ex = new CFException();
1486 <
1487 <        g.completeExceptionally(ex);
1488 <        checkIncomplete(h);
1489 <        f.complete(v1);
1462 >        final IncFunction[] rs = new IncFunction[4];
1463 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1464  
1465 <        checkCompletedWithWrappedCFException(h, ex);
1466 <        checkCompletedWithWrappedCFException(g, ex);
1467 <        assertEquals(0, r.invocationCount);
1468 <        checkCompletedNormally(f, v1);
1465 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1466 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1467 >        assertTrue(f.completeExceptionally(ex));
1468 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1469 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1470 >
1471 >        checkCompletedWithWrappedException(h0, ex);
1472 >        checkCompletedWithWrappedException(h1, ex);
1473 >        checkCompletedWithWrappedException(h2, ex);
1474 >        checkCompletedWithWrappedException(h3, ex);
1475 >        checkCompletedExceptionally(f, ex);
1476 >        for (IncFunction r : rs) r.assertNotInvoked();
1477      }}
1478  
1479 <    public void testThenAcceptBoth_exceptionalCompletion3() {
1479 >    /**
1480 >     * thenApply result completes exceptionally if source cancelled
1481 >     */
1482 >    public void testThenApply_sourceCancelled() {
1483          for (ExecutionMode m : ExecutionMode.values())
1484 <        for (Integer v1 : new Integer[] { 1, null })
1484 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1485      {
1486          final CompletableFuture<Integer> f = new CompletableFuture<>();
1487 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1488 <        final SubtractAction r = new SubtractAction();
1504 <        final CFException ex = new CFException();
1487 >        final IncFunction[] rs = new IncFunction[4];
1488 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1489  
1490 <        g.completeExceptionally(ex);
1491 <        f.complete(v1);
1492 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1490 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1491 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1492 >        assertTrue(f.cancel(mayInterruptIfRunning));
1493 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1494 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1495  
1496 <        checkCompletedWithWrappedCFException(h, ex);
1497 <        checkCompletedWithWrappedCFException(g, ex);
1498 <        assertEquals(0, r.invocationCount);
1499 <        checkCompletedNormally(f, v1);
1496 >        checkCompletedWithWrappedCancellationException(h0);
1497 >        checkCompletedWithWrappedCancellationException(h1);
1498 >        checkCompletedWithWrappedCancellationException(h2);
1499 >        checkCompletedWithWrappedCancellationException(h3);
1500 >        checkCancelled(f);
1501 >        for (IncFunction r : rs) r.assertNotInvoked();
1502      }}
1503  
1504 <    public void testThenAcceptBoth_exceptionalCompletion4() {
1504 >    /**
1505 >     * thenApply result completes exceptionally if action does
1506 >     */
1507 >    public void testThenApply_actionFailed() {
1508          for (ExecutionMode m : ExecutionMode.values())
1509          for (Integer v1 : new Integer[] { 1, null })
1510      {
1511          final CompletableFuture<Integer> f = new CompletableFuture<>();
1512 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1513 <        final SubtractAction r = new SubtractAction();
1523 <        final CFException ex = new CFException();
1512 >        final FailingFunction[] rs = new FailingFunction[4];
1513 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
1514  
1515 <        f.completeExceptionally(ex);
1516 <        g.complete(v1);
1517 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1515 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1516 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1517 >        assertTrue(f.complete(v1));
1518 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1519 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1520  
1521 <        checkCompletedWithWrappedCFException(h, ex);
1522 <        checkCompletedWithWrappedCFException(f, ex);
1523 <        assertEquals(0, r.invocationCount);
1524 <        checkCompletedNormally(g, v1);
1521 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1522 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1523 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1524 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1525 >        checkCompletedNormally(f, v1);
1526      }}
1527  
1528      /**
1529 <     * thenAcceptBoth result completes exceptionally if action does
1529 >     * thenAccept result completes normally after normal completion of source
1530       */
1531 <    public void testThenAcceptBoth_actionFailed1() {
1531 >    public void testThenAccept_normalCompletion() {
1532          for (ExecutionMode m : ExecutionMode.values())
1533          for (Integer v1 : new Integer[] { 1, null })
1541        for (Integer v2 : new Integer[] { 2, null })
1534      {
1535          final CompletableFuture<Integer> f = new CompletableFuture<>();
1536 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1537 <        final FailingBiConsumer r = new FailingBiConsumer();
1546 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1536 >        final NoopConsumer[] rs = new NoopConsumer[4];
1537 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1538  
1539 <        f.complete(v1);
1540 <        checkIncomplete(h);
1541 <        g.complete(v2);
1539 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1540 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1541 >        checkIncomplete(h0);
1542 >        checkIncomplete(h1);
1543 >        assertTrue(f.complete(v1));
1544 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1545 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1546  
1547 <        checkCompletedWithWrappedCFException(h);
1547 >        checkCompletedNormally(h0, null);
1548 >        checkCompletedNormally(h1, null);
1549 >        checkCompletedNormally(h2, null);
1550 >        checkCompletedNormally(h3, null);
1551          checkCompletedNormally(f, v1);
1552 <        checkCompletedNormally(g, v2);
1552 >        for (NoopConsumer r : rs) r.assertValue(v1);
1553      }}
1554  
1555 <    public void testThenAcceptBoth_actionFailed2() {
1555 >    /**
1556 >     * thenAccept result completes exceptionally after exceptional
1557 >     * completion of source
1558 >     */
1559 >    public void testThenAccept_exceptionalCompletion() {
1560          for (ExecutionMode m : ExecutionMode.values())
1559        for (Integer v1 : new Integer[] { 1, null })
1560        for (Integer v2 : new Integer[] { 2, null })
1561      {
1562 +        final CFException ex = new CFException();
1563          final CompletableFuture<Integer> f = new CompletableFuture<>();
1564 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1565 <        final FailingBiConsumer r = new FailingBiConsumer();
1565 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1566 <
1567 <        g.complete(v2);
1568 <        checkIncomplete(h);
1569 <        f.complete(v1);
1564 >        final NoopConsumer[] rs = new NoopConsumer[4];
1565 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1566  
1567 <        checkCompletedWithWrappedCFException(h);
1568 <        checkCompletedNormally(f, v1);
1569 <        checkCompletedNormally(g, v2);
1567 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1568 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1569 >        assertTrue(f.completeExceptionally(ex));
1570 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1571 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1572 >
1573 >        checkCompletedWithWrappedException(h0, ex);
1574 >        checkCompletedWithWrappedException(h1, ex);
1575 >        checkCompletedWithWrappedException(h2, ex);
1576 >        checkCompletedWithWrappedException(h3, ex);
1577 >        checkCompletedExceptionally(f, ex);
1578 >        for (NoopConsumer r : rs) r.assertNotInvoked();
1579      }}
1580  
1581      /**
1582 <     * thenAcceptBoth result completes exceptionally if either source cancelled
1582 >     * thenAccept result completes exceptionally if source cancelled
1583       */
1584 <    public void testThenAcceptBoth_sourceCancelled1() {
1584 >    public void testThenAccept_sourceCancelled() {
1585          for (ExecutionMode m : ExecutionMode.values())
1586          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1582        for (Integer v1 : new Integer[] { 1, null })
1587      {
1588          final CompletableFuture<Integer> f = new CompletableFuture<>();
1589 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1590 <        final SubtractAction r = new SubtractAction();
1587 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1589 >        final NoopConsumer[] rs = new NoopConsumer[4];
1590 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1591  
1592 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1593 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1594          assertTrue(f.cancel(mayInterruptIfRunning));
1595 <        checkIncomplete(h);
1596 <        g.complete(v1);
1595 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1596 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1597  
1598 <        checkCompletedWithWrappedCancellationException(h);
1598 >        checkCompletedWithWrappedCancellationException(h0);
1599 >        checkCompletedWithWrappedCancellationException(h1);
1600 >        checkCompletedWithWrappedCancellationException(h2);
1601 >        checkCompletedWithWrappedCancellationException(h3);
1602          checkCancelled(f);
1603 <        assertEquals(0, r.invocationCount);
1596 <        checkCompletedNormally(g, v1);
1603 >        for (NoopConsumer r : rs) r.assertNotInvoked();
1604      }}
1605  
1606 <    public void testThenAcceptBoth_sourceCancelled2() {
1606 >    /**
1607 >     * thenAccept result completes exceptionally if action does
1608 >     */
1609 >    public void testThenAccept_actionFailed() {
1610          for (ExecutionMode m : ExecutionMode.values())
1601        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1611          for (Integer v1 : new Integer[] { 1, null })
1612      {
1613          final CompletableFuture<Integer> f = new CompletableFuture<>();
1614 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1615 <        final SubtractAction r = new SubtractAction();
1607 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1614 >        final FailingConsumer[] rs = new FailingConsumer[4];
1615 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
1616  
1617 <        assertTrue(g.cancel(mayInterruptIfRunning));
1618 <        checkIncomplete(h);
1619 <        f.complete(v1);
1617 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1618 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1619 >        assertTrue(f.complete(v1));
1620 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1621 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1622  
1623 <        checkCompletedWithWrappedCancellationException(h);
1624 <        checkCancelled(g);
1625 <        assertEquals(0, r.invocationCount);
1623 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1624 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1625 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1626 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1627          checkCompletedNormally(f, v1);
1628      }}
1629  
1630 <    public void testThenAcceptBoth_sourceCancelled3() {
1630 >    /**
1631 >     * thenCombine result completes normally after normal completion
1632 >     * of sources
1633 >     */
1634 >    public void testThenCombine_normalCompletion() {
1635          for (ExecutionMode m : ExecutionMode.values())
1636 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1636 >        for (boolean fFirst : new boolean[] { true, false })
1637          for (Integer v1 : new Integer[] { 1, null })
1638 +        for (Integer v2 : new Integer[] { 2, null })
1639      {
1640          final CompletableFuture<Integer> f = new CompletableFuture<>();
1641          final CompletableFuture<Integer> g = new CompletableFuture<>();
1642 <        final SubtractAction r = new SubtractAction();
1642 >        final SubtractFunction[] rs = new SubtractFunction[6];
1643 >        for (int i = 0; i < rs.length; i++) rs[i] = new SubtractFunction(m);
1644  
1645 <        assertTrue(g.cancel(mayInterruptIfRunning));
1646 <        f.complete(v1);
1647 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1645 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1646 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1647 >        final Integer w1 =  fFirst ? v1 : v2;
1648 >        final Integer w2 = !fFirst ? v1 : v2;
1649 >
1650 >        final CompletableFuture<Integer> h0 = m.thenCombine(f, g, rs[0]);
1651 >        final CompletableFuture<Integer> h1 = m.thenCombine(fst, fst, rs[1]);
1652 >        assertTrue(fst.complete(w1));
1653 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, rs[2]);
1654 >        final CompletableFuture<Integer> h3 = m.thenCombine(fst, fst, rs[3]);
1655 >        checkIncomplete(h0); rs[0].assertNotInvoked();
1656 >        checkIncomplete(h2); rs[2].assertNotInvoked();
1657 >        checkCompletedNormally(h1, subtract(w1, w1));
1658 >        checkCompletedNormally(h3, subtract(w1, w1));
1659 >        rs[1].assertValue(subtract(w1, w1));
1660 >        rs[3].assertValue(subtract(w1, w1));
1661 >        assertTrue(snd.complete(w2));
1662 >        final CompletableFuture<Integer> h4 = m.thenCombine(f, g, rs[4]);
1663 >
1664 >        checkCompletedNormally(h0, subtract(v1, v2));
1665 >        checkCompletedNormally(h2, subtract(v1, v2));
1666 >        checkCompletedNormally(h4, subtract(v1, v2));
1667 >        rs[0].assertValue(subtract(v1, v2));
1668 >        rs[2].assertValue(subtract(v1, v2));
1669 >        rs[4].assertValue(subtract(v1, v2));
1670  
1632        checkCompletedWithWrappedCancellationException(h);
1633        checkCancelled(g);
1634        assertEquals(0, r.invocationCount);
1671          checkCompletedNormally(f, v1);
1672 <    }}
1637 <
1638 <    public void testThenAcceptBoth_sourceCancelled4() {
1639 <        for (ExecutionMode m : ExecutionMode.values())
1640 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1641 <        for (Integer v1 : new Integer[] { 1, null })
1642 <    {
1643 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1644 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1645 <        final SubtractAction r = new SubtractAction();
1646 <
1647 <        assertTrue(f.cancel(mayInterruptIfRunning));
1648 <        g.complete(v1);
1649 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1650 <
1651 <        checkCompletedWithWrappedCancellationException(h);
1652 <        checkCancelled(f);
1653 <        assertEquals(0, r.invocationCount);
1654 <        checkCompletedNormally(g, v1);
1672 >        checkCompletedNormally(g, v2);
1673      }}
1674  
1675      /**
1676 <     * runAfterBoth result completes normally after normal
1677 <     * completion of sources
1676 >     * thenCombine result completes exceptionally after exceptional
1677 >     * completion of either source
1678       */
1679 <    public void testRunAfterBoth_normalCompletion1() {
1679 >    public void testThenCombine_exceptionalCompletion() throws Throwable {
1680          for (ExecutionMode m : ExecutionMode.values())
1681 +        for (boolean fFirst : new boolean[] { true, false })
1682 +        for (boolean failFirst : new boolean[] { true, false })
1683          for (Integer v1 : new Integer[] { 1, null })
1664        for (Integer v2 : new Integer[] { 2, null })
1684      {
1685          final CompletableFuture<Integer> f = new CompletableFuture<>();
1686          final CompletableFuture<Integer> g = new CompletableFuture<>();
1687 <        final Noop r = new Noop();
1688 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1689 <
1690 <        f.complete(v1);
1691 <        checkIncomplete(h);
1692 <        assertEquals(0, r.invocationCount);
1693 <        g.complete(v2);
1694 <
1695 <        checkCompletedNormally(h, null);
1696 <        assertEquals(1, r.invocationCount);
1697 <        checkCompletedNormally(f, v1);
1698 <        checkCompletedNormally(g, v2);
1687 >        final CFException ex = new CFException();
1688 >        final SubtractFunction r1 = new SubtractFunction(m);
1689 >        final SubtractFunction r2 = new SubtractFunction(m);
1690 >        final SubtractFunction r3 = new SubtractFunction(m);
1691 >
1692 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1693 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1694 >        final Callable<Boolean> complete1 = failFirst ?
1695 >            () -> fst.completeExceptionally(ex) :
1696 >            () -> fst.complete(v1);
1697 >        final Callable<Boolean> complete2 = failFirst ?
1698 >            () -> snd.complete(v1) :
1699 >            () -> snd.completeExceptionally(ex);
1700 >
1701 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1702 >        assertTrue(complete1.call());
1703 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1704 >        checkIncomplete(h1);
1705 >        checkIncomplete(h2);
1706 >        assertTrue(complete2.call());
1707 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1708 >
1709 >        checkCompletedWithWrappedException(h1, ex);
1710 >        checkCompletedWithWrappedException(h2, ex);
1711 >        checkCompletedWithWrappedException(h3, ex);
1712 >        r1.assertNotInvoked();
1713 >        r2.assertNotInvoked();
1714 >        r3.assertNotInvoked();
1715 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1716 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1717      }}
1718  
1719 <    public void testRunAfterBoth_normalCompletion2() {
1719 >    /**
1720 >     * thenCombine result completes exceptionally if either source cancelled
1721 >     */
1722 >    public void testThenCombine_sourceCancelled() throws Throwable {
1723          for (ExecutionMode m : ExecutionMode.values())
1724 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1725 +        for (boolean fFirst : new boolean[] { true, false })
1726 +        for (boolean failFirst : new boolean[] { true, false })
1727          for (Integer v1 : new Integer[] { 1, null })
1685        for (Integer v2 : new Integer[] { 2, null })
1728      {
1729          final CompletableFuture<Integer> f = new CompletableFuture<>();
1730          final CompletableFuture<Integer> g = new CompletableFuture<>();
1731 <        final Noop r = new Noop();
1732 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1733 <
1734 <        g.complete(v2);
1735 <        checkIncomplete(h);
1736 <        assertEquals(0, r.invocationCount);
1737 <        f.complete(v1);
1738 <
1739 <        checkCompletedNormally(h, null);
1740 <        assertEquals(1, r.invocationCount);
1741 <        checkCompletedNormally(f, v1);
1742 <        checkCompletedNormally(g, v2);
1731 >        final SubtractFunction r1 = new SubtractFunction(m);
1732 >        final SubtractFunction r2 = new SubtractFunction(m);
1733 >        final SubtractFunction r3 = new SubtractFunction(m);
1734 >
1735 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1736 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1737 >        final Callable<Boolean> complete1 = failFirst ?
1738 >            () -> fst.cancel(mayInterruptIfRunning) :
1739 >            () -> fst.complete(v1);
1740 >        final Callable<Boolean> complete2 = failFirst ?
1741 >            () -> snd.complete(v1) :
1742 >            () -> snd.cancel(mayInterruptIfRunning);
1743 >
1744 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1745 >        assertTrue(complete1.call());
1746 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1747 >        checkIncomplete(h1);
1748 >        checkIncomplete(h2);
1749 >        assertTrue(complete2.call());
1750 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1751 >
1752 >        checkCompletedWithWrappedCancellationException(h1);
1753 >        checkCompletedWithWrappedCancellationException(h2);
1754 >        checkCompletedWithWrappedCancellationException(h3);
1755 >        r1.assertNotInvoked();
1756 >        r2.assertNotInvoked();
1757 >        r3.assertNotInvoked();
1758 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1759 >        checkCancelled(failFirst ? fst : snd);
1760      }}
1761  
1762 <    public void testRunAfterBoth_normalCompletion3() {
1762 >    /**
1763 >     * thenCombine result completes exceptionally if action does
1764 >     */
1765 >    public void testThenCombine_actionFailed() {
1766          for (ExecutionMode m : ExecutionMode.values())
1767 +        for (boolean fFirst : new boolean[] { true, false })
1768          for (Integer v1 : new Integer[] { 1, null })
1769          for (Integer v2 : new Integer[] { 2, null })
1770      {
1771          final CompletableFuture<Integer> f = new CompletableFuture<>();
1772          final CompletableFuture<Integer> g = new CompletableFuture<>();
1773 <        final Noop r = new Noop();
1774 <
1775 <        g.complete(v2);
1776 <        f.complete(v1);
1777 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1778 <
1779 <        checkCompletedNormally(h, null);
1780 <        assertEquals(1, r.invocationCount);
1773 >        final FailingBiFunction r1 = new FailingBiFunction(m);
1774 >        final FailingBiFunction r2 = new FailingBiFunction(m);
1775 >        final FailingBiFunction r3 = new FailingBiFunction(m);
1776 >
1777 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1778 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1779 >        final Integer w1 =  fFirst ? v1 : v2;
1780 >        final Integer w2 = !fFirst ? v1 : v2;
1781 >
1782 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1783 >        assertTrue(fst.complete(w1));
1784 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1785 >        assertTrue(snd.complete(w2));
1786 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1787 >
1788 >        checkCompletedWithWrappedException(h1, r1.ex);
1789 >        checkCompletedWithWrappedException(h2, r2.ex);
1790 >        checkCompletedWithWrappedException(h3, r3.ex);
1791 >        r1.assertInvoked();
1792 >        r2.assertInvoked();
1793 >        r3.assertInvoked();
1794          checkCompletedNormally(f, v1);
1795          checkCompletedNormally(g, v2);
1796      }}
1797  
1798 <    public void testRunAfterBoth_normalCompletion4() {
1798 >    /**
1799 >     * thenAcceptBoth result completes normally after normal
1800 >     * completion of sources
1801 >     */
1802 >    public void testThenAcceptBoth_normalCompletion() {
1803          for (ExecutionMode m : ExecutionMode.values())
1804 +        for (boolean fFirst : new boolean[] { true, false })
1805          for (Integer v1 : new Integer[] { 1, null })
1806          for (Integer v2 : new Integer[] { 2, null })
1807      {
1808          final CompletableFuture<Integer> f = new CompletableFuture<>();
1809          final CompletableFuture<Integer> g = new CompletableFuture<>();
1810 <        final Noop r = new Noop();
1811 <
1812 <        f.complete(v1);
1813 <        g.complete(v2);
1814 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1815 <
1816 <        checkCompletedNormally(h, null);
1817 <        assertEquals(1, r.invocationCount);
1810 >        final SubtractAction r1 = new SubtractAction(m);
1811 >        final SubtractAction r2 = new SubtractAction(m);
1812 >        final SubtractAction r3 = new SubtractAction(m);
1813 >
1814 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1815 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1816 >        final Integer w1 =  fFirst ? v1 : v2;
1817 >        final Integer w2 = !fFirst ? v1 : v2;
1818 >
1819 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1820 >        assertTrue(fst.complete(w1));
1821 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1822 >        checkIncomplete(h1);
1823 >        checkIncomplete(h2);
1824 >        r1.assertNotInvoked();
1825 >        r2.assertNotInvoked();
1826 >        assertTrue(snd.complete(w2));
1827 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1828 >
1829 >        checkCompletedNormally(h1, null);
1830 >        checkCompletedNormally(h2, null);
1831 >        checkCompletedNormally(h3, null);
1832 >        r1.assertValue(subtract(v1, v2));
1833 >        r2.assertValue(subtract(v1, v2));
1834 >        r3.assertValue(subtract(v1, v2));
1835          checkCompletedNormally(f, v1);
1836          checkCompletedNormally(g, v2);
1837      }}
1838  
1839      /**
1840 <     * runAfterBoth result completes exceptionally after exceptional
1840 >     * thenAcceptBoth result completes exceptionally after exceptional
1841       * completion of either source
1842       */
1843 <    public void testRunAfterBoth_exceptionalCompletion1() {
1746 <        for (ExecutionMode m : ExecutionMode.values())
1747 <        for (Integer v1 : new Integer[] { 1, null })
1748 <    {
1749 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1750 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1751 <        final Noop r = new Noop();
1752 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1753 <        final CFException ex = new CFException();
1754 <
1755 <        f.completeExceptionally(ex);
1756 <        checkIncomplete(h);
1757 <        g.complete(v1);
1758 <
1759 <        checkCompletedWithWrappedCFException(h, ex);
1760 <        checkCompletedWithWrappedCFException(f, ex);
1761 <        assertEquals(0, r.invocationCount);
1762 <        checkCompletedNormally(g, v1);
1763 <    }}
1764 <
1765 <    public void testRunAfterBoth_exceptionalCompletion2() {
1766 <        for (ExecutionMode m : ExecutionMode.values())
1767 <        for (Integer v1 : new Integer[] { 1, null })
1768 <    {
1769 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1770 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1771 <        final Noop r = new Noop();
1772 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1773 <        final CFException ex = new CFException();
1774 <
1775 <        g.completeExceptionally(ex);
1776 <        checkIncomplete(h);
1777 <        f.complete(v1);
1778 <
1779 <        checkCompletedWithWrappedCFException(h, ex);
1780 <        checkCompletedWithWrappedCFException(g, ex);
1781 <        assertEquals(0, r.invocationCount);
1782 <        checkCompletedNormally(f, v1);
1783 <    }}
1784 <
1785 <    public void testRunAfterBoth_exceptionalCompletion3() {
1843 >    public void testThenAcceptBoth_exceptionalCompletion() throws Throwable {
1844          for (ExecutionMode m : ExecutionMode.values())
1845 +        for (boolean fFirst : new boolean[] { true, false })
1846 +        for (boolean failFirst : new boolean[] { true, false })
1847          for (Integer v1 : new Integer[] { 1, null })
1848      {
1849          final CompletableFuture<Integer> f = new CompletableFuture<>();
1850          final CompletableFuture<Integer> g = new CompletableFuture<>();
1791        final Noop r = new Noop();
1851          final CFException ex = new CFException();
1852 <
1853 <        g.completeExceptionally(ex);
1854 <        f.complete(v1);
1855 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1856 <
1857 <        checkCompletedWithWrappedCFException(h, ex);
1858 <        checkCompletedWithWrappedCFException(g, ex);
1859 <        assertEquals(0, r.invocationCount);
1860 <        checkCompletedNormally(f, v1);
1852 >        final SubtractAction r1 = new SubtractAction(m);
1853 >        final SubtractAction r2 = new SubtractAction(m);
1854 >        final SubtractAction r3 = new SubtractAction(m);
1855 >
1856 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1857 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1858 >        final Callable<Boolean> complete1 = failFirst ?
1859 >            () -> fst.completeExceptionally(ex) :
1860 >            () -> fst.complete(v1);
1861 >        final Callable<Boolean> complete2 = failFirst ?
1862 >            () -> snd.complete(v1) :
1863 >            () -> snd.completeExceptionally(ex);
1864 >
1865 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1866 >        assertTrue(complete1.call());
1867 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1868 >        checkIncomplete(h1);
1869 >        checkIncomplete(h2);
1870 >        assertTrue(complete2.call());
1871 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1872 >
1873 >        checkCompletedWithWrappedException(h1, ex);
1874 >        checkCompletedWithWrappedException(h2, ex);
1875 >        checkCompletedWithWrappedException(h3, ex);
1876 >        r1.assertNotInvoked();
1877 >        r2.assertNotInvoked();
1878 >        r3.assertNotInvoked();
1879 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1880 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1881      }}
1882  
1883 <    public void testRunAfterBoth_exceptionalCompletion4() {
1883 >    /**
1884 >     * thenAcceptBoth result completes exceptionally if either source cancelled
1885 >     */
1886 >    public void testThenAcceptBoth_sourceCancelled() throws Throwable {
1887          for (ExecutionMode m : ExecutionMode.values())
1888 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1889 +        for (boolean fFirst : new boolean[] { true, false })
1890 +        for (boolean failFirst : new boolean[] { true, false })
1891          for (Integer v1 : new Integer[] { 1, null })
1892      {
1893          final CompletableFuture<Integer> f = new CompletableFuture<>();
1894          final CompletableFuture<Integer> g = new CompletableFuture<>();
1895 <        final Noop r = new Noop();
1896 <        final CFException ex = new CFException();
1897 <
1898 <        f.completeExceptionally(ex);
1899 <        g.complete(v1);
1900 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1901 <
1902 <        checkCompletedWithWrappedCFException(h, ex);
1903 <        checkCompletedWithWrappedCFException(f, ex);
1904 <        assertEquals(0, r.invocationCount);
1905 <        checkCompletedNormally(g, v1);
1895 >        final SubtractAction r1 = new SubtractAction(m);
1896 >        final SubtractAction r2 = new SubtractAction(m);
1897 >        final SubtractAction r3 = new SubtractAction(m);
1898 >
1899 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1900 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1901 >        final Callable<Boolean> complete1 = failFirst ?
1902 >            () -> fst.cancel(mayInterruptIfRunning) :
1903 >            () -> fst.complete(v1);
1904 >        final Callable<Boolean> complete2 = failFirst ?
1905 >            () -> snd.complete(v1) :
1906 >            () -> snd.cancel(mayInterruptIfRunning);
1907 >
1908 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1909 >        assertTrue(complete1.call());
1910 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1911 >        checkIncomplete(h1);
1912 >        checkIncomplete(h2);
1913 >        assertTrue(complete2.call());
1914 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1915 >
1916 >        checkCompletedWithWrappedCancellationException(h1);
1917 >        checkCompletedWithWrappedCancellationException(h2);
1918 >        checkCompletedWithWrappedCancellationException(h3);
1919 >        r1.assertNotInvoked();
1920 >        r2.assertNotInvoked();
1921 >        r3.assertNotInvoked();
1922 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1923 >        checkCancelled(failFirst ? fst : snd);
1924      }}
1925  
1926      /**
1927 <     * runAfterBoth result completes exceptionally if action does
1927 >     * thenAcceptBoth result completes exceptionally if action does
1928       */
1929 <    public void testRunAfterBoth_actionFailed1() {
1929 >    public void testThenAcceptBoth_actionFailed() {
1930          for (ExecutionMode m : ExecutionMode.values())
1931 +        for (boolean fFirst : new boolean[] { true, false })
1932          for (Integer v1 : new Integer[] { 1, null })
1933          for (Integer v2 : new Integer[] { 2, null })
1934      {
1935          final CompletableFuture<Integer> f = new CompletableFuture<>();
1936          final CompletableFuture<Integer> g = new CompletableFuture<>();
1937 <        final FailingNoop r = new FailingNoop();
1938 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1939 <
1940 <        f.complete(v1);
1941 <        checkIncomplete(h);
1942 <        g.complete(v2);
1943 <
1944 <        checkCompletedWithWrappedCFException(h);
1937 >        final FailingBiConsumer r1 = new FailingBiConsumer(m);
1938 >        final FailingBiConsumer r2 = new FailingBiConsumer(m);
1939 >        final FailingBiConsumer r3 = new FailingBiConsumer(m);
1940 >
1941 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1942 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1943 >        final Integer w1 =  fFirst ? v1 : v2;
1944 >        final Integer w2 = !fFirst ? v1 : v2;
1945 >
1946 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1947 >        assertTrue(fst.complete(w1));
1948 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1949 >        assertTrue(snd.complete(w2));
1950 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1951 >
1952 >        checkCompletedWithWrappedException(h1, r1.ex);
1953 >        checkCompletedWithWrappedException(h2, r2.ex);
1954 >        checkCompletedWithWrappedException(h3, r3.ex);
1955 >        r1.assertInvoked();
1956 >        r2.assertInvoked();
1957 >        r3.assertInvoked();
1958          checkCompletedNormally(f, v1);
1959          checkCompletedNormally(g, v2);
1960      }}
1961  
1962 <    public void testRunAfterBoth_actionFailed2() {
1962 >    /**
1963 >     * runAfterBoth result completes normally after normal
1964 >     * completion of sources
1965 >     */
1966 >    public void testRunAfterBoth_normalCompletion() {
1967          for (ExecutionMode m : ExecutionMode.values())
1968 +        for (boolean fFirst : new boolean[] { true, false })
1969          for (Integer v1 : new Integer[] { 1, null })
1970          for (Integer v2 : new Integer[] { 2, null })
1971      {
1972          final CompletableFuture<Integer> f = new CompletableFuture<>();
1973          final CompletableFuture<Integer> g = new CompletableFuture<>();
1974 <        final FailingNoop r = new FailingNoop();
1975 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1976 <
1977 <        g.complete(v2);
1978 <        checkIncomplete(h);
1979 <        f.complete(v1);
1980 <
1981 <        checkCompletedWithWrappedCFException(h);
1974 >        final Noop r1 = new Noop(m);
1975 >        final Noop r2 = new Noop(m);
1976 >        final Noop r3 = new Noop(m);
1977 >
1978 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1979 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1980 >        final Integer w1 =  fFirst ? v1 : v2;
1981 >        final Integer w2 = !fFirst ? v1 : v2;
1982 >
1983 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
1984 >        assertTrue(fst.complete(w1));
1985 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
1986 >        checkIncomplete(h1);
1987 >        checkIncomplete(h2);
1988 >        r1.assertNotInvoked();
1989 >        r2.assertNotInvoked();
1990 >        assertTrue(snd.complete(w2));
1991 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
1992 >
1993 >        checkCompletedNormally(h1, null);
1994 >        checkCompletedNormally(h2, null);
1995 >        checkCompletedNormally(h3, null);
1996 >        r1.assertInvoked();
1997 >        r2.assertInvoked();
1998 >        r3.assertInvoked();
1999          checkCompletedNormally(f, v1);
2000          checkCompletedNormally(g, v2);
2001      }}
2002  
2003      /**
2004 <     * runAfterBoth result completes exceptionally if either source cancelled
2004 >     * runAfterBoth result completes exceptionally after exceptional
2005 >     * completion of either source
2006       */
2007 <    public void testRunAfterBoth_sourceCancelled1() {
1868 <        for (ExecutionMode m : ExecutionMode.values())
1869 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1870 <        for (Integer v1 : new Integer[] { 1, null })
1871 <    {
1872 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1873 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1874 <        final Noop r = new Noop();
1875 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1876 <
1877 <        assertTrue(f.cancel(mayInterruptIfRunning));
1878 <        checkIncomplete(h);
1879 <        g.complete(v1);
1880 <
1881 <        checkCompletedWithWrappedCancellationException(h);
1882 <        checkCancelled(f);
1883 <        assertEquals(0, r.invocationCount);
1884 <        checkCompletedNormally(g, v1);
1885 <    }}
1886 <
1887 <    public void testRunAfterBoth_sourceCancelled2() {
1888 <        for (ExecutionMode m : ExecutionMode.values())
1889 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1890 <        for (Integer v1 : new Integer[] { 1, null })
1891 <    {
1892 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1893 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1894 <        final Noop r = new Noop();
1895 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1896 <
1897 <        assertTrue(g.cancel(mayInterruptIfRunning));
1898 <        checkIncomplete(h);
1899 <        f.complete(v1);
1900 <
1901 <        checkCompletedWithWrappedCancellationException(h);
1902 <        checkCancelled(g);
1903 <        assertEquals(0, r.invocationCount);
1904 <        checkCompletedNormally(f, v1);
1905 <    }}
1906 <
1907 <    public void testRunAfterBoth_sourceCancelled3() {
2007 >    public void testRunAfterBoth_exceptionalCompletion() throws Throwable {
2008          for (ExecutionMode m : ExecutionMode.values())
2009 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2009 >        for (boolean fFirst : new boolean[] { true, false })
2010 >        for (boolean failFirst : new boolean[] { true, false })
2011          for (Integer v1 : new Integer[] { 1, null })
2012      {
2013          final CompletableFuture<Integer> f = new CompletableFuture<>();
2014          final CompletableFuture<Integer> g = new CompletableFuture<>();
2015 <        final Noop r = new Noop();
2016 <
2017 <        assertTrue(g.cancel(mayInterruptIfRunning));
2018 <        f.complete(v1);
2019 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
2020 <
2021 <        checkCompletedWithWrappedCancellationException(h);
2022 <        checkCancelled(g);
2023 <        assertEquals(0, r.invocationCount);
2024 <        checkCompletedNormally(f, v1);
2015 >        final CFException ex = new CFException();
2016 >        final Noop r1 = new Noop(m);
2017 >        final Noop r2 = new Noop(m);
2018 >        final Noop r3 = new Noop(m);
2019 >
2020 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2021 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2022 >        final Callable<Boolean> complete1 = failFirst ?
2023 >            () -> fst.completeExceptionally(ex) :
2024 >            () -> fst.complete(v1);
2025 >        final Callable<Boolean> complete2 = failFirst ?
2026 >            () -> snd.complete(v1) :
2027 >            () -> snd.completeExceptionally(ex);
2028 >
2029 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2030 >        assertTrue(complete1.call());
2031 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2032 >        checkIncomplete(h1);
2033 >        checkIncomplete(h2);
2034 >        assertTrue(complete2.call());
2035 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2036 >
2037 >        checkCompletedWithWrappedException(h1, ex);
2038 >        checkCompletedWithWrappedException(h2, ex);
2039 >        checkCompletedWithWrappedException(h3, ex);
2040 >        r1.assertNotInvoked();
2041 >        r2.assertNotInvoked();
2042 >        r3.assertNotInvoked();
2043 >        checkCompletedNormally(failFirst ? snd : fst, v1);
2044 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
2045      }}
2046  
2047 <    public void testRunAfterBoth_sourceCancelled4() {
2047 >    /**
2048 >     * runAfterBoth result completes exceptionally if either source cancelled
2049 >     */
2050 >    public void testRunAfterBoth_sourceCancelled() throws Throwable {
2051          for (ExecutionMode m : ExecutionMode.values())
2052          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2053 +        for (boolean fFirst : new boolean[] { true, false })
2054 +        for (boolean failFirst : new boolean[] { true, false })
2055          for (Integer v1 : new Integer[] { 1, null })
2056      {
2057          final CompletableFuture<Integer> f = new CompletableFuture<>();
2058          final CompletableFuture<Integer> g = new CompletableFuture<>();
2059 <        final Noop r = new Noop();
2060 <
2061 <        assertTrue(f.cancel(mayInterruptIfRunning));
2062 <        g.complete(v1);
2063 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
2064 <
2065 <        checkCompletedWithWrappedCancellationException(h);
2066 <        checkCancelled(f);
2067 <        assertEquals(0, r.invocationCount);
2068 <        checkCompletedNormally(g, v1);
2059 >        final Noop r1 = new Noop(m);
2060 >        final Noop r2 = new Noop(m);
2061 >        final Noop r3 = new Noop(m);
2062 >
2063 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2064 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2065 >        final Callable<Boolean> complete1 = failFirst ?
2066 >            () -> fst.cancel(mayInterruptIfRunning) :
2067 >            () -> fst.complete(v1);
2068 >        final Callable<Boolean> complete2 = failFirst ?
2069 >            () -> snd.complete(v1) :
2070 >            () -> snd.cancel(mayInterruptIfRunning);
2071 >
2072 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2073 >        assertTrue(complete1.call());
2074 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2075 >        checkIncomplete(h1);
2076 >        checkIncomplete(h2);
2077 >        assertTrue(complete2.call());
2078 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2079 >
2080 >        checkCompletedWithWrappedCancellationException(h1);
2081 >        checkCompletedWithWrappedCancellationException(h2);
2082 >        checkCompletedWithWrappedCancellationException(h3);
2083 >        r1.assertNotInvoked();
2084 >        r2.assertNotInvoked();
2085 >        r3.assertNotInvoked();
2086 >        checkCompletedNormally(failFirst ? snd : fst, v1);
2087 >        checkCancelled(failFirst ? fst : snd);
2088      }}
2089  
2090      /**
2091 <     * applyToEither result completes normally after normal completion
1947 <     * of either source
2091 >     * runAfterBoth result completes exceptionally if action does
2092       */
2093 <    public void testApplyToEither_normalCompletion1() {
2093 >    public void testRunAfterBoth_actionFailed() {
2094          for (ExecutionMode m : ExecutionMode.values())
2095 +        for (boolean fFirst : new boolean[] { true, false })
2096          for (Integer v1 : new Integer[] { 1, null })
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);
2103 <
2104 <        f.complete(v1);
2105 <        checkCompletedNormally(h, inc(v1));
2106 <        g.complete(v2);
2107 <
2101 >        final FailingRunnable r1 = new FailingRunnable(m);
2102 >        final FailingRunnable r2 = new FailingRunnable(m);
2103 >        final FailingRunnable r3 = new FailingRunnable(m);
2104 >
2105 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2106 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2107 >        final Integer w1 =  fFirst ? v1 : v2;
2108 >        final Integer w2 = !fFirst ? v1 : v2;
2109 >
2110 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2111 >        assertTrue(fst.complete(w1));
2112 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2113 >        assertTrue(snd.complete(w2));
2114 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2115 >
2116 >        checkCompletedWithWrappedException(h1, r1.ex);
2117 >        checkCompletedWithWrappedException(h2, r2.ex);
2118 >        checkCompletedWithWrappedException(h3, r3.ex);
2119 >        r1.assertInvoked();
2120 >        r2.assertInvoked();
2121 >        r3.assertInvoked();
2122          checkCompletedNormally(f, v1);
2123          checkCompletedNormally(g, v2);
1965        checkCompletedNormally(h, inc(v1));
2124      }}
2125  
2126 <    public void testApplyToEither_normalCompletion2() {
2126 >    /**
2127 >     * applyToEither result completes normally after normal completion
2128 >     * of either source
2129 >     */
2130 >    public void testApplyToEither_normalCompletion() {
2131          for (ExecutionMode m : ExecutionMode.values())
2132          for (Integer v1 : new Integer[] { 1, null })
2133          for (Integer v2 : new Integer[] { 2, null })
2134      {
2135          final CompletableFuture<Integer> f = new CompletableFuture<>();
2136          final CompletableFuture<Integer> g = new CompletableFuture<>();
2137 <        final IncFunction r = new IncFunction();
2138 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2137 >        final IncFunction[] rs = new IncFunction[6];
2138 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2139  
2140 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2141 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2142 +        checkIncomplete(h0);
2143 +        checkIncomplete(h1);
2144 +        rs[0].assertNotInvoked();
2145 +        rs[1].assertNotInvoked();
2146 +        f.complete(v1);
2147 +        checkCompletedNormally(h0, inc(v1));
2148 +        checkCompletedNormally(h1, inc(v1));
2149 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2150 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2151 +        checkCompletedNormally(h2, inc(v1));
2152 +        checkCompletedNormally(h3, inc(v1));
2153          g.complete(v2);
1979        checkCompletedNormally(h, inc(v2));
1980        f.complete(v1);
2154  
2155 <        checkCompletedNormally(f, v1);
2156 <        checkCompletedNormally(g, v2);
2157 <        checkCompletedNormally(h, inc(v2));
2158 <        }}
2159 <
2160 <    public void testApplyToEither_normalCompletion3() {
2161 <        for (ExecutionMode m : ExecutionMode.values())
2162 <        for (Integer v1 : new Integer[] { 1, null })
2163 <        for (Integer v2 : new Integer[] { 2, null })
1991 <    {
1992 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1993 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1994 <        final IncFunction r = new IncFunction();
1995 <
1996 <        f.complete(v1);
1997 <        g.complete(v2);
1998 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2155 >        // unspecified behavior - both source completions available
2156 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2157 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2158 >        rs[4].assertValue(h4.join());
2159 >        rs[5].assertValue(h5.join());
2160 >        assertTrue(Objects.equals(inc(v1), h4.join()) ||
2161 >                   Objects.equals(inc(v2), h4.join()));
2162 >        assertTrue(Objects.equals(inc(v1), h5.join()) ||
2163 >                   Objects.equals(inc(v2), h5.join()));
2164  
2165          checkCompletedNormally(f, v1);
2166          checkCompletedNormally(g, v2);
2167 <
2168 <        // unspecified behavior
2169 <        assertTrue(Objects.equals(h.join(), inc(v1)) ||
2170 <                   Objects.equals(h.join(), inc(v2)));
2171 <        assertEquals(1, r.invocationCount);
2167 >        checkCompletedNormally(h0, inc(v1));
2168 >        checkCompletedNormally(h1, inc(v1));
2169 >        checkCompletedNormally(h2, inc(v1));
2170 >        checkCompletedNormally(h3, inc(v1));
2171 >        for (int i = 0; i < 4; i++) rs[i].assertValue(inc(v1));
2172      }}
2173  
2174      /**
2175       * applyToEither result completes exceptionally after exceptional
2176       * completion of either source
2177       */
2178 <    public void testApplyToEither_exceptionalCompletion1() {
2178 >    public void testApplyToEither_exceptionalCompletion() {
2179          for (ExecutionMode m : ExecutionMode.values())
2180          for (Integer v1 : new Integer[] { 1, null })
2181      {
2182          final CompletableFuture<Integer> f = new CompletableFuture<>();
2183          final CompletableFuture<Integer> g = new CompletableFuture<>();
2019        final IncFunction r = new IncFunction();
2020        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2184          final CFException ex = new CFException();
2185 +        final IncFunction[] rs = new IncFunction[6];
2186 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2187  
2188 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2189 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2190 +        checkIncomplete(h0);
2191 +        checkIncomplete(h1);
2192 +        rs[0].assertNotInvoked();
2193 +        rs[1].assertNotInvoked();
2194          f.completeExceptionally(ex);
2195 <        checkCompletedWithWrappedCFException(h, ex);
2195 >        checkCompletedWithWrappedException(h0, ex);
2196 >        checkCompletedWithWrappedException(h1, ex);
2197 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2198 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2199 >        checkCompletedWithWrappedException(h2, ex);
2200 >        checkCompletedWithWrappedException(h3, ex);
2201          g.complete(v1);
2202  
2203 <        assertEquals(0, r.invocationCount);
2203 >        // unspecified behavior - both source completions available
2204 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2205 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2206 >        try {
2207 >            assertEquals(inc(v1), h4.join());
2208 >            rs[4].assertValue(inc(v1));
2209 >        } catch (CompletionException ok) {
2210 >            checkCompletedWithWrappedException(h4, ex);
2211 >            rs[4].assertNotInvoked();
2212 >        }
2213 >        try {
2214 >            assertEquals(inc(v1), h5.join());
2215 >            rs[5].assertValue(inc(v1));
2216 >        } catch (CompletionException ok) {
2217 >            checkCompletedWithWrappedException(h5, ex);
2218 >            rs[5].assertNotInvoked();
2219 >        }
2220 >
2221 >        checkCompletedExceptionally(f, ex);
2222          checkCompletedNormally(g, v1);
2223 <        checkCompletedWithWrappedCFException(f, ex);
2224 <        checkCompletedWithWrappedCFException(h, ex);
2223 >        checkCompletedWithWrappedException(h0, ex);
2224 >        checkCompletedWithWrappedException(h1, ex);
2225 >        checkCompletedWithWrappedException(h2, ex);
2226 >        checkCompletedWithWrappedException(h3, ex);
2227 >        checkCompletedWithWrappedException(h4, ex);
2228 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2229      }}
2230  
2231      public void testApplyToEither_exceptionalCompletion2() {
2232          for (ExecutionMode m : ExecutionMode.values())
2233 +        for (boolean fFirst : new boolean[] { true, false })
2234          for (Integer v1 : new Integer[] { 1, null })
2235      {
2236          final CompletableFuture<Integer> f = new CompletableFuture<>();
2237          final CompletableFuture<Integer> g = new CompletableFuture<>();
2039        final IncFunction r = new IncFunction();
2040        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2041        final CFException ex = new CFException();
2042
2043        g.completeExceptionally(ex);
2044        checkCompletedWithWrappedCFException(h, ex);
2045        f.complete(v1);
2046
2047        assertEquals(0, r.invocationCount);
2048        checkCompletedNormally(f, v1);
2049        checkCompletedWithWrappedCFException(g, ex);
2050        checkCompletedWithWrappedCFException(h, ex);
2051    }}
2052
2053    public void testApplyToEither_exceptionalCompletion3() {
2054        for (ExecutionMode m : ExecutionMode.values())
2055        for (Integer v1 : new Integer[] { 1, null })
2056    {
2057        final CompletableFuture<Integer> f = new CompletableFuture<>();
2058        final CompletableFuture<Integer> g = new CompletableFuture<>();
2059        final IncFunction r = new IncFunction();
2238          final CFException ex = new CFException();
2239 +        final IncFunction[] rs = new IncFunction[6];
2240 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2241  
2242 <        g.completeExceptionally(ex);
2243 <        f.complete(v1);
2244 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2242 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2243 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2244 >        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2245 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2246 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2247 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2248  
2249 <        // unspecified behavior
2067 <        Integer v;
2249 >        // unspecified behavior - both source completions available
2250          try {
2251 <            assertEquals(inc(v1), h.join());
2252 <            assertEquals(1, r.invocationCount);
2251 >            assertEquals(inc(v1), h0.join());
2252 >            rs[0].assertValue(inc(v1));
2253          } catch (CompletionException ok) {
2254 <            checkCompletedWithWrappedCFException(h, ex);
2255 <            assertEquals(0, r.invocationCount);
2254 >            checkCompletedWithWrappedException(h0, ex);
2255 >            rs[0].assertNotInvoked();
2256          }
2075
2076        checkCompletedWithWrappedCFException(g, ex);
2077        checkCompletedNormally(f, v1);
2078    }}
2079
2080    public void testApplyToEither_exceptionalCompletion4() {
2081        for (ExecutionMode m : ExecutionMode.values())
2082        for (Integer v1 : new Integer[] { 1, null })
2083    {
2084        final CompletableFuture<Integer> f = new CompletableFuture<>();
2085        final CompletableFuture<Integer> g = new CompletableFuture<>();
2086        final IncFunction r = new IncFunction();
2087        final CFException ex = new CFException();
2088
2089        f.completeExceptionally(ex);
2090        g.complete(v1);
2091        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2092
2093        // unspecified behavior
2094        Integer v;
2257          try {
2258 <            assertEquals(inc(v1), h.join());
2259 <            assertEquals(1, r.invocationCount);
2258 >            assertEquals(inc(v1), h1.join());
2259 >            rs[1].assertValue(inc(v1));
2260          } catch (CompletionException ok) {
2261 <            checkCompletedWithWrappedCFException(h, ex);
2262 <            assertEquals(0, r.invocationCount);
2261 >            checkCompletedWithWrappedException(h1, ex);
2262 >            rs[1].assertNotInvoked();
2263 >        }
2264 >        try {
2265 >            assertEquals(inc(v1), h2.join());
2266 >            rs[2].assertValue(inc(v1));
2267 >        } catch (CompletionException ok) {
2268 >            checkCompletedWithWrappedException(h2, ex);
2269 >            rs[2].assertNotInvoked();
2270 >        }
2271 >        try {
2272 >            assertEquals(inc(v1), h3.join());
2273 >            rs[3].assertValue(inc(v1));
2274 >        } catch (CompletionException ok) {
2275 >            checkCompletedWithWrappedException(h3, ex);
2276 >            rs[3].assertNotInvoked();
2277          }
2278  
2103        checkCompletedWithWrappedCFException(f, ex);
2104        checkCompletedNormally(g, v1);
2105    }}
2106
2107    /**
2108     * applyToEither result completes exceptionally if action does
2109     */
2110    public void testApplyToEither_actionFailed1() {
2111        for (ExecutionMode m : ExecutionMode.values())
2112        for (Integer v1 : new Integer[] { 1, null })
2113        for (Integer v2 : new Integer[] { 2, null })
2114    {
2115        final CompletableFuture<Integer> f = new CompletableFuture<>();
2116        final CompletableFuture<Integer> g = new CompletableFuture<>();
2117        final FailingFunction r = new FailingFunction();
2118        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2119
2120        f.complete(v1);
2121        checkCompletedWithWrappedCFException(h);
2122        g.complete(v2);
2123        checkCompletedNormally(f, v1);
2124        checkCompletedNormally(g, v2);
2125    }}
2126
2127    public void testApplyToEither_actionFailed2() {
2128        for (ExecutionMode m : ExecutionMode.values())
2129        for (Integer v1 : new Integer[] { 1, null })
2130        for (Integer v2 : new Integer[] { 2, null })
2131    {
2132        final CompletableFuture<Integer> f = new CompletableFuture<>();
2133        final CompletableFuture<Integer> g = new CompletableFuture<>();
2134        final FailingFunction r = new FailingFunction();
2135        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2136
2137        g.complete(v2);
2138        checkCompletedWithWrappedCFException(h);
2139        f.complete(v1);
2279          checkCompletedNormally(f, v1);
2280 <        checkCompletedNormally(g, v2);
2280 >        checkCompletedExceptionally(g, ex);
2281      }}
2282  
2283      /**
2284       * applyToEither result completes exceptionally if either source cancelled
2285       */
2286 <    public void testApplyToEither_sourceCancelled1() {
2286 >    public void testApplyToEither_sourceCancelled() {
2287          for (ExecutionMode m : ExecutionMode.values())
2288          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2289          for (Integer v1 : new Integer[] { 1, null })
2290      {
2291          final CompletableFuture<Integer> f = new CompletableFuture<>();
2292          final CompletableFuture<Integer> g = new CompletableFuture<>();
2293 <        final IncFunction r = new IncFunction();
2294 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2293 >        final IncFunction[] rs = new IncFunction[6];
2294 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2295  
2296 <        assertTrue(f.cancel(mayInterruptIfRunning));
2297 <        checkCompletedWithWrappedCancellationException(h);
2296 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2297 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2298 >        checkIncomplete(h0);
2299 >        checkIncomplete(h1);
2300 >        rs[0].assertNotInvoked();
2301 >        rs[1].assertNotInvoked();
2302 >        f.cancel(mayInterruptIfRunning);
2303 >        checkCompletedWithWrappedCancellationException(h0);
2304 >        checkCompletedWithWrappedCancellationException(h1);
2305 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2306 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2307 >        checkCompletedWithWrappedCancellationException(h2);
2308 >        checkCompletedWithWrappedCancellationException(h3);
2309          g.complete(v1);
2310  
2311 +        // unspecified behavior - both source completions available
2312 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2313 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2314 +        try {
2315 +            assertEquals(inc(v1), h4.join());
2316 +            rs[4].assertValue(inc(v1));
2317 +        } catch (CompletionException ok) {
2318 +            checkCompletedWithWrappedCancellationException(h4);
2319 +            rs[4].assertNotInvoked();
2320 +        }
2321 +        try {
2322 +            assertEquals(inc(v1), h5.join());
2323 +            rs[5].assertValue(inc(v1));
2324 +        } catch (CompletionException ok) {
2325 +            checkCompletedWithWrappedCancellationException(h5);
2326 +            rs[5].assertNotInvoked();
2327 +        }
2328 +
2329          checkCancelled(f);
2162        assertEquals(0, r.invocationCount);
2330          checkCompletedNormally(g, v1);
2331 <        checkCompletedWithWrappedCancellationException(h);
2331 >        checkCompletedWithWrappedCancellationException(h0);
2332 >        checkCompletedWithWrappedCancellationException(h1);
2333 >        checkCompletedWithWrappedCancellationException(h2);
2334 >        checkCompletedWithWrappedCancellationException(h3);
2335 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2336      }}
2337  
2338      public void testApplyToEither_sourceCancelled2() {
2339          for (ExecutionMode m : ExecutionMode.values())
2340          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2341 +        for (boolean fFirst : new boolean[] { true, false })
2342          for (Integer v1 : new Integer[] { 1, null })
2343      {
2344          final CompletableFuture<Integer> f = new CompletableFuture<>();
2345          final CompletableFuture<Integer> g = new CompletableFuture<>();
2346 <        final IncFunction r = new IncFunction();
2347 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2176 <
2177 <        assertTrue(g.cancel(mayInterruptIfRunning));
2178 <        checkCompletedWithWrappedCancellationException(h);
2179 <        f.complete(v1);
2180 <
2181 <        checkCancelled(g);
2182 <        assertEquals(0, r.invocationCount);
2183 <        checkCompletedNormally(f, v1);
2184 <        checkCompletedWithWrappedCancellationException(h);
2185 <    }}
2186 <
2187 <    public void testApplyToEither_sourceCancelled3() {
2188 <        for (ExecutionMode m : ExecutionMode.values())
2189 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2190 <        for (Integer v1 : new Integer[] { 1, null })
2191 <    {
2192 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2193 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2194 <        final IncFunction r = new IncFunction();
2346 >        final IncFunction[] rs = new IncFunction[6];
2347 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2348  
2349 <        assertTrue(g.cancel(mayInterruptIfRunning));
2350 <        f.complete(v1);
2351 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2349 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2350 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2351 >        assertTrue(fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2352 >        assertTrue(!fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2353 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2354 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2355  
2356 <        // unspecified behavior
2201 <        Integer v;
2356 >        // unspecified behavior - both source completions available
2357          try {
2358 <            assertEquals(inc(v1), h.join());
2359 <            assertEquals(1, r.invocationCount);
2358 >            assertEquals(inc(v1), h0.join());
2359 >            rs[0].assertValue(inc(v1));
2360          } catch (CompletionException ok) {
2361 <            checkCompletedWithWrappedCancellationException(h);
2362 <            assertEquals(0, r.invocationCount);
2361 >            checkCompletedWithWrappedCancellationException(h0);
2362 >            rs[0].assertNotInvoked();
2363 >        }
2364 >        try {
2365 >            assertEquals(inc(v1), h1.join());
2366 >            rs[1].assertValue(inc(v1));
2367 >        } catch (CompletionException ok) {
2368 >            checkCompletedWithWrappedCancellationException(h1);
2369 >            rs[1].assertNotInvoked();
2370          }
2209
2210        checkCancelled(g);
2211        checkCompletedNormally(f, v1);
2212    }}
2213
2214    public void testApplyToEither_sourceCancelled4() {
2215        for (ExecutionMode m : ExecutionMode.values())
2216        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2217        for (Integer v1 : new Integer[] { 1, null })
2218    {
2219        final CompletableFuture<Integer> f = new CompletableFuture<>();
2220        final CompletableFuture<Integer> g = new CompletableFuture<>();
2221        final IncFunction r = new IncFunction();
2222
2223        assertTrue(f.cancel(mayInterruptIfRunning));
2224        g.complete(v1);
2225        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2226
2227        // unspecified behavior
2228        Integer v;
2371          try {
2372 <            assertEquals(inc(v1), h.join());
2373 <            assertEquals(1, r.invocationCount);
2372 >            assertEquals(inc(v1), h2.join());
2373 >            rs[2].assertValue(inc(v1));
2374          } catch (CompletionException ok) {
2375 <            checkCompletedWithWrappedCancellationException(h);
2376 <            assertEquals(0, r.invocationCount);
2375 >            checkCompletedWithWrappedCancellationException(h2);
2376 >            rs[2].assertNotInvoked();
2377 >        }
2378 >        try {
2379 >            assertEquals(inc(v1), h3.join());
2380 >            rs[3].assertValue(inc(v1));
2381 >        } catch (CompletionException ok) {
2382 >            checkCompletedWithWrappedCancellationException(h3);
2383 >            rs[3].assertNotInvoked();
2384          }
2385  
2386 <        checkCancelled(f);
2387 <        checkCompletedNormally(g, v1);
2386 >        checkCompletedNormally(f, v1);
2387 >        checkCancelled(g);
2388      }}
2389  
2390      /**
2391 <     * acceptEither result completes normally after normal completion
2243 <     * of either source
2391 >     * applyToEither result completes exceptionally if action does
2392       */
2393 <    public void testAcceptEither_normalCompletion1() {
2393 >    public void testApplyToEither_actionFailed() {
2394          for (ExecutionMode m : ExecutionMode.values())
2395          for (Integer v1 : new Integer[] { 1, null })
2396          for (Integer v2 : new Integer[] { 2, null })
2397      {
2398          final CompletableFuture<Integer> f = new CompletableFuture<>();
2399          final CompletableFuture<Integer> g = new CompletableFuture<>();
2400 <        final IncAction r = new IncAction();
2401 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2400 >        final FailingFunction[] rs = new FailingFunction[6];
2401 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
2402  
2403 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2404 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2405          f.complete(v1);
2406 <        checkCompletedNormally(h, null);
2407 <        assertEquals(inc(v1), r.value);
2408 <        g.complete(v2);
2409 <
2410 <        checkCompletedNormally(f, v1);
2411 <        checkCompletedNormally(g, v2);
2412 <        checkCompletedNormally(h, null);
2263 <    }}
2264 <
2265 <    public void testAcceptEither_normalCompletion2() {
2266 <        for (ExecutionMode m : ExecutionMode.values())
2267 <        for (Integer v1 : new Integer[] { 1, null })
2268 <        for (Integer v2 : new Integer[] { 2, null })
2269 <    {
2270 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2271 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2272 <        final IncAction r = new IncAction();
2273 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2406 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2407 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2408 >        checkCompletedWithWrappedException(h0, rs[0].ex);
2409 >        checkCompletedWithWrappedException(h1, rs[1].ex);
2410 >        checkCompletedWithWrappedException(h2, rs[2].ex);
2411 >        checkCompletedWithWrappedException(h3, rs[3].ex);
2412 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2413  
2414          g.complete(v2);
2415 <        checkCompletedNormally(h, null);
2416 <        assertEquals(inc(v2), r.value);
2417 <        f.complete(v1);
2415 >
2416 >        // unspecified behavior - both source completions available
2417 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2418 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2419 >
2420 >        checkCompletedWithWrappedException(h4, rs[4].ex);
2421 >        assertTrue(Objects.equals(v1, rs[4].value) ||
2422 >                   Objects.equals(v2, rs[4].value));
2423 >        checkCompletedWithWrappedException(h5, rs[5].ex);
2424 >        assertTrue(Objects.equals(v1, rs[5].value) ||
2425 >                   Objects.equals(v2, rs[5].value));
2426  
2427          checkCompletedNormally(f, v1);
2428          checkCompletedNormally(g, v2);
2282        checkCompletedNormally(h, null);
2429      }}
2430  
2431 <    public void testAcceptEither_normalCompletion3() {
2431 >    /**
2432 >     * acceptEither result completes normally after normal completion
2433 >     * of either source
2434 >     */
2435 >    public void testAcceptEither_normalCompletion() {
2436          for (ExecutionMode m : ExecutionMode.values())
2437          for (Integer v1 : new Integer[] { 1, null })
2438          for (Integer v2 : new Integer[] { 2, null })
2439      {
2440          final CompletableFuture<Integer> f = new CompletableFuture<>();
2441          final CompletableFuture<Integer> g = new CompletableFuture<>();
2442 <        final IncAction r = new IncAction();
2442 >        final NoopConsumer[] rs = new NoopConsumer[6];
2443 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2444  
2445 <        f.complete(v1);
2445 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2446 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2447 >        checkIncomplete(h0);
2448 >        checkIncomplete(h1);
2449 >        rs[0].assertNotInvoked();
2450 >        rs[1].assertNotInvoked();
2451 >        f.complete(v1);
2452 >        checkCompletedNormally(h0, null);
2453 >        checkCompletedNormally(h1, null);
2454 >        rs[0].assertValue(v1);
2455 >        rs[1].assertValue(v1);
2456 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2457 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2458 >        checkCompletedNormally(h2, null);
2459 >        checkCompletedNormally(h3, null);
2460 >        rs[2].assertValue(v1);
2461 >        rs[3].assertValue(v1);
2462          g.complete(v2);
2296        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2463  
2464 <        checkCompletedNormally(h, null);
2464 >        // unspecified behavior - both source completions available
2465 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2466 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2467 >        checkCompletedNormally(h4, null);
2468 >        checkCompletedNormally(h5, null);
2469 >        assertTrue(Objects.equals(v1, rs[4].value) ||
2470 >                   Objects.equals(v2, rs[4].value));
2471 >        assertTrue(Objects.equals(v1, rs[5].value) ||
2472 >                   Objects.equals(v2, rs[5].value));
2473 >
2474          checkCompletedNormally(f, v1);
2475          checkCompletedNormally(g, v2);
2476 <
2477 <        // unspecified behavior
2478 <        assertTrue(Objects.equals(r.value, inc(v1)) ||
2479 <                   Objects.equals(r.value, inc(v2)));
2476 >        checkCompletedNormally(h0, null);
2477 >        checkCompletedNormally(h1, null);
2478 >        checkCompletedNormally(h2, null);
2479 >        checkCompletedNormally(h3, null);
2480 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2481      }}
2482  
2483      /**
2484       * acceptEither result completes exceptionally after exceptional
2485       * completion of either source
2486       */
2487 <    public void testAcceptEither_exceptionalCompletion1() {
2487 >    public void testAcceptEither_exceptionalCompletion() {
2488          for (ExecutionMode m : ExecutionMode.values())
2489          for (Integer v1 : new Integer[] { 1, null })
2490      {
2491          final CompletableFuture<Integer> f = new CompletableFuture<>();
2492          final CompletableFuture<Integer> g = new CompletableFuture<>();
2317        final IncAction r = new IncAction();
2318        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2493          final CFException ex = new CFException();
2494 +        final NoopConsumer[] rs = new NoopConsumer[6];
2495 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2496  
2497 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2498 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2499 +        checkIncomplete(h0);
2500 +        checkIncomplete(h1);
2501 +        rs[0].assertNotInvoked();
2502 +        rs[1].assertNotInvoked();
2503          f.completeExceptionally(ex);
2504 <        checkCompletedWithWrappedCFException(h, ex);
2504 >        checkCompletedWithWrappedException(h0, ex);
2505 >        checkCompletedWithWrappedException(h1, ex);
2506 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2507 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2508 >        checkCompletedWithWrappedException(h2, ex);
2509 >        checkCompletedWithWrappedException(h3, ex);
2510 >
2511          g.complete(v1);
2512  
2513 <        assertEquals(0, r.invocationCount);
2513 >        // unspecified behavior - both source completions available
2514 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2515 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2516 >        try {
2517 >            assertNull(h4.join());
2518 >            rs[4].assertValue(v1);
2519 >        } catch (CompletionException ok) {
2520 >            checkCompletedWithWrappedException(h4, ex);
2521 >            rs[4].assertNotInvoked();
2522 >        }
2523 >        try {
2524 >            assertNull(h5.join());
2525 >            rs[5].assertValue(v1);
2526 >        } catch (CompletionException ok) {
2527 >            checkCompletedWithWrappedException(h5, ex);
2528 >            rs[5].assertNotInvoked();
2529 >        }
2530 >
2531 >        checkCompletedExceptionally(f, ex);
2532          checkCompletedNormally(g, v1);
2533 <        checkCompletedWithWrappedCFException(f, ex);
2534 <        checkCompletedWithWrappedCFException(h, ex);
2533 >        checkCompletedWithWrappedException(h0, ex);
2534 >        checkCompletedWithWrappedException(h1, ex);
2535 >        checkCompletedWithWrappedException(h2, ex);
2536 >        checkCompletedWithWrappedException(h3, ex);
2537 >        checkCompletedWithWrappedException(h4, ex);
2538 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2539      }}
2540  
2541      public void testAcceptEither_exceptionalCompletion2() {
2542          for (ExecutionMode m : ExecutionMode.values())
2543 +        for (boolean fFirst : new boolean[] { true, false })
2544          for (Integer v1 : new Integer[] { 1, null })
2545      {
2546          final CompletableFuture<Integer> f = new CompletableFuture<>();
2547          final CompletableFuture<Integer> g = new CompletableFuture<>();
2337        final IncAction r = new IncAction();
2338        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2339        final CFException ex = new CFException();
2340
2341        g.completeExceptionally(ex);
2342        checkCompletedWithWrappedCFException(h, ex);
2343        f.complete(v1);
2344
2345        assertEquals(0, r.invocationCount);
2346        checkCompletedNormally(f, v1);
2347        checkCompletedWithWrappedCFException(g, ex);
2348        checkCompletedWithWrappedCFException(h, ex);
2349    }}
2350
2351    public void testAcceptEither_exceptionalCompletion3() {
2352        for (ExecutionMode m : ExecutionMode.values())
2353        for (Integer v1 : new Integer[] { 1, null })
2354    {
2355        final CompletableFuture<Integer> f = new CompletableFuture<>();
2356        final CompletableFuture<Integer> g = new CompletableFuture<>();
2357        final IncAction r = new IncAction();
2548          final CFException ex = new CFException();
2549 +        final NoopConsumer[] rs = new NoopConsumer[6];
2550 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2551  
2552 <        g.completeExceptionally(ex);
2553 <        f.complete(v1);
2554 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2552 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2553 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2554 >        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2555 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2556 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2557 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2558  
2559 <        // unspecified behavior
2365 <        Integer v;
2559 >        // unspecified behavior - both source completions available
2560          try {
2561 <            assertNull(h.join());
2562 <            assertEquals(1, r.invocationCount);
2369 <            assertEquals(inc(v1), r.value);
2561 >            assertNull(h0.join());
2562 >            rs[0].assertValue(v1);
2563          } catch (CompletionException ok) {
2564 <            checkCompletedWithWrappedCFException(h, ex);
2565 <            assertEquals(0, r.invocationCount);
2564 >            checkCompletedWithWrappedException(h0, ex);
2565 >            rs[0].assertNotInvoked();
2566          }
2374
2375        checkCompletedWithWrappedCFException(g, ex);
2376        checkCompletedNormally(f, v1);
2377    }}
2378
2379    public void testAcceptEither_exceptionalCompletion4() {
2380        for (ExecutionMode m : ExecutionMode.values())
2381        for (Integer v1 : new Integer[] { 1, null })
2382    {
2383        final CompletableFuture<Integer> f = new CompletableFuture<>();
2384        final CompletableFuture<Integer> g = new CompletableFuture<>();
2385        final IncAction r = new IncAction();
2386        final CFException ex = new CFException();
2387
2388        f.completeExceptionally(ex);
2389        g.complete(v1);
2390        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2391
2392        // unspecified behavior
2393        Integer v;
2567          try {
2568 <            assertNull(h.join());
2569 <            assertEquals(1, r.invocationCount);
2397 <            assertEquals(inc(v1), r.value);
2568 >            assertNull(h1.join());
2569 >            rs[1].assertValue(v1);
2570          } catch (CompletionException ok) {
2571 <            checkCompletedWithWrappedCFException(h, ex);
2572 <            assertEquals(0, r.invocationCount);
2571 >            checkCompletedWithWrappedException(h1, ex);
2572 >            rs[1].assertNotInvoked();
2573 >        }
2574 >        try {
2575 >            assertNull(h2.join());
2576 >            rs[2].assertValue(v1);
2577 >        } catch (CompletionException ok) {
2578 >            checkCompletedWithWrappedException(h2, ex);
2579 >            rs[2].assertNotInvoked();
2580 >        }
2581 >        try {
2582 >            assertNull(h3.join());
2583 >            rs[3].assertValue(v1);
2584 >        } catch (CompletionException ok) {
2585 >            checkCompletedWithWrappedException(h3, ex);
2586 >            rs[3].assertNotInvoked();
2587          }
2588  
2403        checkCompletedWithWrappedCFException(f, ex);
2404        checkCompletedNormally(g, v1);
2405    }}
2406
2407    /**
2408     * acceptEither result completes exceptionally if action does
2409     */
2410    public void testAcceptEither_actionFailed1() {
2411        for (ExecutionMode m : ExecutionMode.values())
2412        for (Integer v1 : new Integer[] { 1, null })
2413        for (Integer v2 : new Integer[] { 2, null })
2414    {
2415        final CompletableFuture<Integer> f = new CompletableFuture<>();
2416        final CompletableFuture<Integer> g = new CompletableFuture<>();
2417        final FailingConsumer r = new FailingConsumer();
2418        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2419
2420        f.complete(v1);
2421        checkCompletedWithWrappedCFException(h);
2422        g.complete(v2);
2423        checkCompletedNormally(f, v1);
2424        checkCompletedNormally(g, v2);
2425    }}
2426
2427    public void testAcceptEither_actionFailed2() {
2428        for (ExecutionMode m : ExecutionMode.values())
2429        for (Integer v1 : new Integer[] { 1, null })
2430        for (Integer v2 : new Integer[] { 2, null })
2431    {
2432        final CompletableFuture<Integer> f = new CompletableFuture<>();
2433        final CompletableFuture<Integer> g = new CompletableFuture<>();
2434        final FailingConsumer r = new FailingConsumer();
2435        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2436
2437        g.complete(v2);
2438        checkCompletedWithWrappedCFException(h);
2439        f.complete(v1);
2589          checkCompletedNormally(f, v1);
2590 <        checkCompletedNormally(g, v2);
2590 >        checkCompletedExceptionally(g, ex);
2591      }}
2592  
2593      /**
2594       * acceptEither result completes exceptionally if either source cancelled
2595       */
2596 <    public void testAcceptEither_sourceCancelled1() {
2448 <        for (ExecutionMode m : ExecutionMode.values())
2449 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2450 <        for (Integer v1 : new Integer[] { 1, null })
2451 <    {
2452 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2453 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2454 <        final IncAction r = new IncAction();
2455 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2456 <
2457 <        assertTrue(f.cancel(mayInterruptIfRunning));
2458 <        checkCompletedWithWrappedCancellationException(h);
2459 <        g.complete(v1);
2460 <
2461 <        checkCancelled(f);
2462 <        assertEquals(0, r.invocationCount);
2463 <        checkCompletedNormally(g, v1);
2464 <        checkCompletedWithWrappedCancellationException(h);
2465 <    }}
2466 <
2467 <    public void testAcceptEither_sourceCancelled2() {
2596 >    public void testAcceptEither_sourceCancelled() {
2597          for (ExecutionMode m : ExecutionMode.values())
2598          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2599          for (Integer v1 : new Integer[] { 1, null })
2600      {
2601          final CompletableFuture<Integer> f = new CompletableFuture<>();
2602          final CompletableFuture<Integer> g = new CompletableFuture<>();
2603 <        final IncAction r = new IncAction();
2604 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2603 >        final NoopConsumer[] rs = new NoopConsumer[6];
2604 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2605  
2606 <        assertTrue(g.cancel(mayInterruptIfRunning));
2607 <        checkCompletedWithWrappedCancellationException(h);
2608 <        f.complete(v1);
2606 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2607 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2608 >        checkIncomplete(h0);
2609 >        checkIncomplete(h1);
2610 >        rs[0].assertNotInvoked();
2611 >        rs[1].assertNotInvoked();
2612 >        f.cancel(mayInterruptIfRunning);
2613 >        checkCompletedWithWrappedCancellationException(h0);
2614 >        checkCompletedWithWrappedCancellationException(h1);
2615 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2616 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2617 >        checkCompletedWithWrappedCancellationException(h2);
2618 >        checkCompletedWithWrappedCancellationException(h3);
2619  
2620 <        checkCancelled(g);
2482 <        assertEquals(0, r.invocationCount);
2483 <        checkCompletedNormally(f, v1);
2484 <        checkCompletedWithWrappedCancellationException(h);
2485 <    }}
2486 <
2487 <    public void testAcceptEither_sourceCancelled3() {
2488 <        for (ExecutionMode m : ExecutionMode.values())
2489 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2490 <        for (Integer v1 : new Integer[] { 1, null })
2491 <    {
2492 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2493 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2494 <        final IncAction r = new IncAction();
2495 <
2496 <        assertTrue(g.cancel(mayInterruptIfRunning));
2497 <        f.complete(v1);
2498 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2620 >        g.complete(v1);
2621  
2622 <        // unspecified behavior
2623 <        Integer v;
2622 >        // unspecified behavior - both source completions available
2623 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2624 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2625          try {
2626 <            assertNull(h.join());
2627 <            assertEquals(1, r.invocationCount);
2505 <            assertEquals(inc(v1), r.value);
2626 >            assertNull(h4.join());
2627 >            rs[4].assertValue(v1);
2628          } catch (CompletionException ok) {
2629 <            checkCompletedWithWrappedCancellationException(h);
2630 <            assertEquals(0, r.invocationCount);
2629 >            checkCompletedWithWrappedCancellationException(h4);
2630 >            rs[4].assertNotInvoked();
2631          }
2510
2511        checkCancelled(g);
2512        checkCompletedNormally(f, v1);
2513    }}
2514
2515    public void testAcceptEither_sourceCancelled4() {
2516        for (ExecutionMode m : ExecutionMode.values())
2517        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2518        for (Integer v1 : new Integer[] { 1, null })
2519    {
2520        final CompletableFuture<Integer> f = new CompletableFuture<>();
2521        final CompletableFuture<Integer> g = new CompletableFuture<>();
2522        final IncAction r = new IncAction();
2523
2524        assertTrue(f.cancel(mayInterruptIfRunning));
2525        g.complete(v1);
2526        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2527
2528        // unspecified behavior
2529        Integer v;
2632          try {
2633 <            assertNull(h.join());
2634 <            assertEquals(1, r.invocationCount);
2533 <            assertEquals(inc(v1), r.value);
2633 >            assertNull(h5.join());
2634 >            rs[5].assertValue(v1);
2635          } catch (CompletionException ok) {
2636 <            checkCompletedWithWrappedCancellationException(h);
2637 <            assertEquals(0, r.invocationCount);
2636 >            checkCompletedWithWrappedCancellationException(h5);
2637 >            rs[5].assertNotInvoked();
2638          }
2639  
2640          checkCancelled(f);
2641          checkCompletedNormally(g, v1);
2642 +        checkCompletedWithWrappedCancellationException(h0);
2643 +        checkCompletedWithWrappedCancellationException(h1);
2644 +        checkCompletedWithWrappedCancellationException(h2);
2645 +        checkCompletedWithWrappedCancellationException(h3);
2646 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2647      }}
2648  
2649      /**
2650 <     * runAfterEither result completes normally after normal completion
2545 <     * of either source
2650 >     * acceptEither result completes exceptionally if action does
2651       */
2652 <    public void testRunAfterEither_normalCompletion1() {
2652 >    public void testAcceptEither_actionFailed() {
2653          for (ExecutionMode m : ExecutionMode.values())
2654          for (Integer v1 : new Integer[] { 1, null })
2655          for (Integer v2 : new Integer[] { 2, null })
2656      {
2657          final CompletableFuture<Integer> f = new CompletableFuture<>();
2658          final CompletableFuture<Integer> g = new CompletableFuture<>();
2659 <        final Noop r = new Noop();
2660 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2659 >        final FailingConsumer[] rs = new FailingConsumer[6];
2660 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
2661  
2662 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2663 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2664          f.complete(v1);
2665 <        checkCompletedNormally(h, null);
2666 <        assertEquals(1, r.invocationCount);
2665 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2666 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2667 >        checkCompletedWithWrappedException(h0, rs[0].ex);
2668 >        checkCompletedWithWrappedException(h1, rs[1].ex);
2669 >        checkCompletedWithWrappedException(h2, rs[2].ex);
2670 >        checkCompletedWithWrappedException(h3, rs[3].ex);
2671 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2672 >
2673          g.complete(v2);
2674  
2675 +        // unspecified behavior - both source completions available
2676 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2677 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2678 +
2679 +        checkCompletedWithWrappedException(h4, rs[4].ex);
2680 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2681 +                   Objects.equals(v2, rs[4].value));
2682 +        checkCompletedWithWrappedException(h5, rs[5].ex);
2683 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2684 +                   Objects.equals(v2, rs[5].value));
2685 +
2686          checkCompletedNormally(f, v1);
2687          checkCompletedNormally(g, v2);
2564        checkCompletedNormally(h, null);
2565        assertEquals(1, r.invocationCount);
2688      }}
2689  
2690 <    public void testRunAfterEither_normalCompletion2() {
2690 >    /**
2691 >     * runAfterEither result completes normally after normal completion
2692 >     * of either source
2693 >     */
2694 >    public void testRunAfterEither_normalCompletion() {
2695          for (ExecutionMode m : ExecutionMode.values())
2696          for (Integer v1 : new Integer[] { 1, null })
2697          for (Integer v2 : new Integer[] { 2, null })
2698 +        for (boolean pushNop : new boolean[] { true, false })
2699      {
2700          final CompletableFuture<Integer> f = new CompletableFuture<>();
2701          final CompletableFuture<Integer> g = new CompletableFuture<>();
2702 <        final Noop r = new Noop();
2703 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2702 >        final Noop[] rs = new Noop[6];
2703 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2704  
2705 <        g.complete(v2);
2706 <        checkCompletedNormally(h, null);
2707 <        assertEquals(1, r.invocationCount);
2705 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2706 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2707 >        checkIncomplete(h0);
2708 >        checkIncomplete(h1);
2709 >        rs[0].assertNotInvoked();
2710 >        rs[1].assertNotInvoked();
2711 >        if (pushNop) {          // ad hoc test of intra-completion interference
2712 >            m.thenRun(f, () -> {});
2713 >            m.thenRun(g, () -> {});
2714 >        }
2715          f.complete(v1);
2716 +        checkCompletedNormally(h0, null);
2717 +        checkCompletedNormally(h1, null);
2718 +        rs[0].assertInvoked();
2719 +        rs[1].assertInvoked();
2720 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2721 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2722 +        checkCompletedNormally(h2, null);
2723 +        checkCompletedNormally(h3, null);
2724 +        rs[2].assertInvoked();
2725 +        rs[3].assertInvoked();
2726  
2583        checkCompletedNormally(f, v1);
2584        checkCompletedNormally(g, v2);
2585        checkCompletedNormally(h, null);
2586        assertEquals(1, r.invocationCount);
2587        }}
2588
2589    public void testRunAfterEither_normalCompletion3() {
2590        for (ExecutionMode m : ExecutionMode.values())
2591        for (Integer v1 : new Integer[] { 1, null })
2592        for (Integer v2 : new Integer[] { 2, null })
2593    {
2594        final CompletableFuture<Integer> f = new CompletableFuture<>();
2595        final CompletableFuture<Integer> g = new CompletableFuture<>();
2596        final Noop r = new Noop();
2597
2598        f.complete(v1);
2727          g.complete(v2);
2600        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2728  
2729 <        checkCompletedNormally(h, null);
2729 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2730 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2731 >
2732          checkCompletedNormally(f, v1);
2733          checkCompletedNormally(g, v2);
2734 <        assertEquals(1, r.invocationCount);
2734 >        checkCompletedNormally(h0, null);
2735 >        checkCompletedNormally(h1, null);
2736 >        checkCompletedNormally(h2, null);
2737 >        checkCompletedNormally(h3, null);
2738 >        checkCompletedNormally(h4, null);
2739 >        checkCompletedNormally(h5, null);
2740 >        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2741      }}
2742  
2743      /**
2744       * runAfterEither result completes exceptionally after exceptional
2745       * completion of either source
2746       */
2747 <    public void testRunAfterEither_exceptionalCompletion1() {
2747 >    public void testRunAfterEither_exceptionalCompletion() {
2748          for (ExecutionMode m : ExecutionMode.values())
2749          for (Integer v1 : new Integer[] { 1, null })
2750      {
2751          final CompletableFuture<Integer> f = new CompletableFuture<>();
2752          final CompletableFuture<Integer> g = new CompletableFuture<>();
2618        final Noop r = new Noop();
2619        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2753          final CFException ex = new CFException();
2754 +        final Noop[] rs = new Noop[6];
2755 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2756  
2757 <        f.completeExceptionally(ex);
2758 <        checkCompletedWithWrappedCFException(h, ex);
2759 <        g.complete(v1);
2757 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2758 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2759 >        checkIncomplete(h0);
2760 >        checkIncomplete(h1);
2761 >        rs[0].assertNotInvoked();
2762 >        rs[1].assertNotInvoked();
2763 >        assertTrue(f.completeExceptionally(ex));
2764 >        checkCompletedWithWrappedException(h0, ex);
2765 >        checkCompletedWithWrappedException(h1, ex);
2766 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2767 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2768 >        checkCompletedWithWrappedException(h2, ex);
2769 >        checkCompletedWithWrappedException(h3, ex);
2770 >
2771 >        assertTrue(g.complete(v1));
2772 >
2773 >        // unspecified behavior - both source completions available
2774 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2775 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2776 >        try {
2777 >            assertNull(h4.join());
2778 >            rs[4].assertInvoked();
2779 >        } catch (CompletionException ok) {
2780 >            checkCompletedWithWrappedException(h4, ex);
2781 >            rs[4].assertNotInvoked();
2782 >        }
2783 >        try {
2784 >            assertNull(h5.join());
2785 >            rs[5].assertInvoked();
2786 >        } catch (CompletionException ok) {
2787 >            checkCompletedWithWrappedException(h5, ex);
2788 >            rs[5].assertNotInvoked();
2789 >        }
2790  
2791 <        assertEquals(0, r.invocationCount);
2791 >        checkCompletedExceptionally(f, ex);
2792          checkCompletedNormally(g, v1);
2793 <        checkCompletedWithWrappedCFException(f, ex);
2794 <        checkCompletedWithWrappedCFException(h, ex);
2793 >        checkCompletedWithWrappedException(h0, ex);
2794 >        checkCompletedWithWrappedException(h1, ex);
2795 >        checkCompletedWithWrappedException(h2, ex);
2796 >        checkCompletedWithWrappedException(h3, ex);
2797 >        checkCompletedWithWrappedException(h4, ex);
2798 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2799      }}
2800  
2801      public void testRunAfterEither_exceptionalCompletion2() {
2802          for (ExecutionMode m : ExecutionMode.values())
2803 +        for (boolean fFirst : new boolean[] { true, false })
2804          for (Integer v1 : new Integer[] { 1, null })
2805      {
2806          final CompletableFuture<Integer> f = new CompletableFuture<>();
2807          final CompletableFuture<Integer> g = new CompletableFuture<>();
2638        final Noop r = new Noop();
2639        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2640        final CFException ex = new CFException();
2641
2642        g.completeExceptionally(ex);
2643        checkCompletedWithWrappedCFException(h, ex);
2644        f.complete(v1);
2645
2646        assertEquals(0, r.invocationCount);
2647        checkCompletedNormally(f, v1);
2648        checkCompletedWithWrappedCFException(g, ex);
2649        checkCompletedWithWrappedCFException(h, ex);
2650    }}
2651
2652    public void testRunAfterEither_exceptionalCompletion3() {
2653        for (ExecutionMode m : ExecutionMode.values())
2654        for (Integer v1 : new Integer[] { 1, null })
2655    {
2656        final CompletableFuture<Integer> f = new CompletableFuture<>();
2657        final CompletableFuture<Integer> g = new CompletableFuture<>();
2658        final Noop r = new Noop();
2808          final CFException ex = new CFException();
2809 +        final Noop[] rs = new Noop[6];
2810 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2811  
2812 <        g.completeExceptionally(ex);
2813 <        f.complete(v1);
2814 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2812 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2813 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2814 >        assertTrue( fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2815 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2816 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2817 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2818  
2819 <        // unspecified behavior
2666 <        Integer v;
2819 >        // unspecified behavior - both source completions available
2820          try {
2821 <            assertNull(h.join());
2822 <            assertEquals(1, r.invocationCount);
2821 >            assertNull(h0.join());
2822 >            rs[0].assertInvoked();
2823          } catch (CompletionException ok) {
2824 <            checkCompletedWithWrappedCFException(h, ex);
2825 <            assertEquals(0, r.invocationCount);
2824 >            checkCompletedWithWrappedException(h0, ex);
2825 >            rs[0].assertNotInvoked();
2826          }
2674
2675        checkCompletedWithWrappedCFException(g, ex);
2676        checkCompletedNormally(f, v1);
2677    }}
2678
2679    public void testRunAfterEither_exceptionalCompletion4() {
2680        for (ExecutionMode m : ExecutionMode.values())
2681        for (Integer v1 : new Integer[] { 1, null })
2682    {
2683        final CompletableFuture<Integer> f = new CompletableFuture<>();
2684        final CompletableFuture<Integer> g = new CompletableFuture<>();
2685        final Noop r = new Noop();
2686        final CFException ex = new CFException();
2687
2688        f.completeExceptionally(ex);
2689        g.complete(v1);
2690        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2691
2692        // unspecified behavior
2693        Integer v;
2827          try {
2828 <            assertNull(h.join());
2829 <            assertEquals(1, r.invocationCount);
2828 >            assertNull(h1.join());
2829 >            rs[1].assertInvoked();
2830          } catch (CompletionException ok) {
2831 <            checkCompletedWithWrappedCFException(h, ex);
2832 <            assertEquals(0, r.invocationCount);
2831 >            checkCompletedWithWrappedException(h1, ex);
2832 >            rs[1].assertNotInvoked();
2833 >        }
2834 >        try {
2835 >            assertNull(h2.join());
2836 >            rs[2].assertInvoked();
2837 >        } catch (CompletionException ok) {
2838 >            checkCompletedWithWrappedException(h2, ex);
2839 >            rs[2].assertNotInvoked();
2840 >        }
2841 >        try {
2842 >            assertNull(h3.join());
2843 >            rs[3].assertInvoked();
2844 >        } catch (CompletionException ok) {
2845 >            checkCompletedWithWrappedException(h3, ex);
2846 >            rs[3].assertNotInvoked();
2847          }
2848  
2702        checkCompletedWithWrappedCFException(f, ex);
2703        checkCompletedNormally(g, v1);
2704    }}
2705
2706    /**
2707     * runAfterEither result completes exceptionally if action does
2708     */
2709    public void testRunAfterEither_actionFailed1() {
2710        for (ExecutionMode m : ExecutionMode.values())
2711        for (Integer v1 : new Integer[] { 1, null })
2712        for (Integer v2 : new Integer[] { 2, null })
2713    {
2714        final CompletableFuture<Integer> f = new CompletableFuture<>();
2715        final CompletableFuture<Integer> g = new CompletableFuture<>();
2716        final FailingNoop r = new FailingNoop();
2717        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2718
2719        f.complete(v1);
2720        checkCompletedWithWrappedCFException(h);
2721        g.complete(v2);
2722        checkCompletedNormally(f, v1);
2723        checkCompletedNormally(g, v2);
2724    }}
2725
2726    public void testRunAfterEither_actionFailed2() {
2727        for (ExecutionMode m : ExecutionMode.values())
2728        for (Integer v1 : new Integer[] { 1, null })
2729        for (Integer v2 : new Integer[] { 2, null })
2730    {
2731        final CompletableFuture<Integer> f = new CompletableFuture<>();
2732        final CompletableFuture<Integer> g = new CompletableFuture<>();
2733        final FailingNoop r = new FailingNoop();
2734        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2735
2736        g.complete(v2);
2737        checkCompletedWithWrappedCFException(h);
2738        f.complete(v1);
2849          checkCompletedNormally(f, v1);
2850 <        checkCompletedNormally(g, v2);
2850 >        checkCompletedExceptionally(g, ex);
2851      }}
2852  
2853      /**
2854       * runAfterEither result completes exceptionally if either source cancelled
2855       */
2856 <    public void testRunAfterEither_sourceCancelled1() {
2747 <        for (ExecutionMode m : ExecutionMode.values())
2748 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2749 <        for (Integer v1 : new Integer[] { 1, null })
2750 <    {
2751 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2752 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2753 <        final Noop r = new Noop();
2754 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2755 <
2756 <        assertTrue(f.cancel(mayInterruptIfRunning));
2757 <        checkCompletedWithWrappedCancellationException(h);
2758 <        g.complete(v1);
2759 <
2760 <        checkCancelled(f);
2761 <        assertEquals(0, r.invocationCount);
2762 <        checkCompletedNormally(g, v1);
2763 <        checkCompletedWithWrappedCancellationException(h);
2764 <    }}
2765 <
2766 <    public void testRunAfterEither_sourceCancelled2() {
2856 >    public void testRunAfterEither_sourceCancelled() {
2857          for (ExecutionMode m : ExecutionMode.values())
2858          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2859          for (Integer v1 : new Integer[] { 1, null })
2860      {
2861          final CompletableFuture<Integer> f = new CompletableFuture<>();
2862          final CompletableFuture<Integer> g = new CompletableFuture<>();
2863 <        final Noop r = new Noop();
2864 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2863 >        final Noop[] rs = new Noop[6];
2864 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2865  
2866 <        assertTrue(g.cancel(mayInterruptIfRunning));
2867 <        checkCompletedWithWrappedCancellationException(h);
2868 <        f.complete(v1);
2869 <
2870 <        checkCancelled(g);
2871 <        assertEquals(0, r.invocationCount);
2872 <        checkCompletedNormally(f, v1);
2873 <        checkCompletedWithWrappedCancellationException(h);
2874 <    }}
2875 <
2876 <    public void testRunAfterEither_sourceCancelled3() {
2877 <        for (ExecutionMode m : ExecutionMode.values())
2878 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2879 <        for (Integer v1 : new Integer[] { 1, null })
2880 <    {
2881 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2882 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2883 <        final Noop r = new Noop();
2884 <
2795 <        assertTrue(g.cancel(mayInterruptIfRunning));
2796 <        f.complete(v1);
2797 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2798 <
2799 <        // unspecified behavior
2800 <        Integer v;
2866 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2867 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2868 >        checkIncomplete(h0);
2869 >        checkIncomplete(h1);
2870 >        rs[0].assertNotInvoked();
2871 >        rs[1].assertNotInvoked();
2872 >        f.cancel(mayInterruptIfRunning);
2873 >        checkCompletedWithWrappedCancellationException(h0);
2874 >        checkCompletedWithWrappedCancellationException(h1);
2875 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2876 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2877 >        checkCompletedWithWrappedCancellationException(h2);
2878 >        checkCompletedWithWrappedCancellationException(h3);
2879 >
2880 >        assertTrue(g.complete(v1));
2881 >
2882 >        // unspecified behavior - both source completions available
2883 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2884 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2885          try {
2886 <            assertNull(h.join());
2887 <            assertEquals(1, r.invocationCount);
2886 >            assertNull(h4.join());
2887 >            rs[4].assertInvoked();
2888          } catch (CompletionException ok) {
2889 <            checkCompletedWithWrappedCancellationException(h);
2890 <            assertEquals(0, r.invocationCount);
2889 >            checkCompletedWithWrappedCancellationException(h4);
2890 >            rs[4].assertNotInvoked();
2891          }
2808
2809        checkCancelled(g);
2810        checkCompletedNormally(f, v1);
2811    }}
2812
2813    public void testRunAfterEither_sourceCancelled4() {
2814        for (ExecutionMode m : ExecutionMode.values())
2815        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2816        for (Integer v1 : new Integer[] { 1, null })
2817    {
2818        final CompletableFuture<Integer> f = new CompletableFuture<>();
2819        final CompletableFuture<Integer> g = new CompletableFuture<>();
2820        final Noop r = new Noop();
2821
2822        assertTrue(f.cancel(mayInterruptIfRunning));
2823        g.complete(v1);
2824        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2825
2826        // unspecified behavior
2827        Integer v;
2892          try {
2893 <            assertNull(h.join());
2894 <            assertEquals(1, r.invocationCount);
2893 >            assertNull(h5.join());
2894 >            rs[5].assertInvoked();
2895          } catch (CompletionException ok) {
2896 <            checkCompletedWithWrappedCancellationException(h);
2897 <            assertEquals(0, r.invocationCount);
2896 >            checkCompletedWithWrappedCancellationException(h5);
2897 >            rs[5].assertNotInvoked();
2898          }
2899  
2900          checkCancelled(f);
2901          checkCompletedNormally(g, v1);
2902 +        checkCompletedWithWrappedCancellationException(h0);
2903 +        checkCompletedWithWrappedCancellationException(h1);
2904 +        checkCompletedWithWrappedCancellationException(h2);
2905 +        checkCompletedWithWrappedCancellationException(h3);
2906 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2907      }}
2908  
2909      /**
2910 <     * thenCompose result completes normally after normal completion of source
2910 >     * runAfterEither result completes exceptionally if action does
2911       */
2912 <    public void testThenCompose_normalCompletion1() {
2912 >    public void testRunAfterEither_actionFailed() {
2913          for (ExecutionMode m : ExecutionMode.values())
2914          for (Integer v1 : new Integer[] { 1, null })
2915 +        for (Integer v2 : new Integer[] { 2, null })
2916      {
2917          final CompletableFuture<Integer> f = new CompletableFuture<>();
2918 <        final CompletableFutureInc r = new CompletableFutureInc();
2919 <        final CompletableFuture<Integer> g = f.thenCompose(r);
2920 <        f.complete(v1);
2921 <        checkCompletedNormally(g, inc(v1));
2918 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2919 >        final FailingRunnable[] rs = new FailingRunnable[6];
2920 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
2921 >
2922 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2923 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2924 >        assertTrue(f.complete(v1));
2925 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2926 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2927 >        checkCompletedWithWrappedException(h0, rs[0].ex);
2928 >        checkCompletedWithWrappedException(h1, rs[1].ex);
2929 >        checkCompletedWithWrappedException(h2, rs[2].ex);
2930 >        checkCompletedWithWrappedException(h3, rs[3].ex);
2931 >        for (int i = 0; i < 4; i++) rs[i].assertInvoked();
2932 >        assertTrue(g.complete(v2));
2933 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2934 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2935 >        checkCompletedWithWrappedException(h4, rs[4].ex);
2936 >        checkCompletedWithWrappedException(h5, rs[5].ex);
2937 >
2938          checkCompletedNormally(f, v1);
2939 <        assertEquals(1, r.invocationCount);
2939 >        checkCompletedNormally(g, v2);
2940 >        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2941      }}
2942  
2943 <    public void testThenCompose_normalCompletion2() {
2943 >    /**
2944 >     * thenCompose result completes normally after normal completion of source
2945 >     */
2946 >    public void testThenCompose_normalCompletion() {
2947          for (ExecutionMode m : ExecutionMode.values())
2948 +        for (boolean createIncomplete : new boolean[] { true, false })
2949          for (Integer v1 : new Integer[] { 1, null })
2950      {
2951          final CompletableFuture<Integer> f = new CompletableFuture<>();
2952 <        final CompletableFutureInc r = new CompletableFutureInc();
2953 <        f.complete(v1);
2954 <        final CompletableFuture<Integer> g = f.thenCompose(r);
2952 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2953 >        if (!createIncomplete) assertTrue(f.complete(v1));
2954 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2955 >        if (createIncomplete) assertTrue(f.complete(v1));
2956 >
2957          checkCompletedNormally(g, inc(v1));
2958          checkCompletedNormally(f, v1);
2959 <        assertEquals(1, r.invocationCount);
2959 >        r.assertValue(v1);
2960      }}
2961  
2962      /**
2963       * thenCompose result completes exceptionally after exceptional
2964       * completion of source
2965       */
2966 <    public void testThenCompose_exceptionalCompletion1() {
2966 >    public void testThenCompose_exceptionalCompletion() {
2967          for (ExecutionMode m : ExecutionMode.values())
2968 +        for (boolean createIncomplete : new boolean[] { true, false })
2969      {
2970          final CFException ex = new CFException();
2971 <        final CompletableFutureInc r = new CompletableFutureInc();
2971 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2972          final CompletableFuture<Integer> f = new CompletableFuture<>();
2973 <        final CompletableFuture<Integer> g = f.thenCompose(r);
2974 <        f.completeExceptionally(ex);
2975 <        checkCompletedWithWrappedCFException(g, ex);
2882 <        checkCompletedWithWrappedCFException(f, ex);
2883 <    }}
2973 >        if (!createIncomplete) f.completeExceptionally(ex);
2974 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2975 >        if (createIncomplete) f.completeExceptionally(ex);
2976  
2977 <    public void testThenCompose_exceptionalCompletion2() {
2978 <        for (ExecutionMode m : ExecutionMode.values())
2979 <    {
2888 <        final CFException ex = new CFException();
2889 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2890 <        f.completeExceptionally(ex);
2891 <        final CompletableFutureInc r = new CompletableFutureInc();
2892 <        final CompletableFuture<Integer> g = f.thenCompose(r);
2893 <        checkCompletedWithWrappedCFException(g, ex);
2894 <        checkCompletedWithWrappedCFException(f, ex);
2977 >        checkCompletedWithWrappedException(g, ex);
2978 >        checkCompletedExceptionally(f, ex);
2979 >        r.assertNotInvoked();
2980      }}
2981  
2982      /**
2983       * thenCompose result completes exceptionally if action does
2984       */
2985 <    public void testThenCompose_actionFailed1() {
2985 >    public void testThenCompose_actionFailed() {
2986          for (ExecutionMode m : ExecutionMode.values())
2987 +        for (boolean createIncomplete : new boolean[] { true, false })
2988          for (Integer v1 : new Integer[] { 1, null })
2989      {
2990          final CompletableFuture<Integer> f = new CompletableFuture<>();
2991          final FailingCompletableFutureFunction r
2992 <            = new FailingCompletableFutureFunction();
2993 <        final CompletableFuture<Integer> g = f.thenCompose(r);
2994 <        f.complete(v1);
2995 <        checkCompletedWithWrappedCFException(g);
2910 <        checkCompletedNormally(f, v1);
2911 <    }}
2992 >            = new FailingCompletableFutureFunction(m);
2993 >        if (!createIncomplete) assertTrue(f.complete(v1));
2994 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2995 >        if (createIncomplete) assertTrue(f.complete(v1));
2996  
2997 <    public void testThenCompose_actionFailed2() {
2914 <        for (ExecutionMode m : ExecutionMode.values())
2915 <        for (Integer v1 : new Integer[] { 1, null })
2916 <    {
2917 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2918 <        f.complete(v1);
2919 <        final FailingCompletableFutureFunction r
2920 <            = new FailingCompletableFutureFunction();
2921 <        final CompletableFuture<Integer> g = f.thenCompose(r);
2922 <        checkCompletedWithWrappedCFException(g);
2997 >        checkCompletedWithWrappedException(g, r.ex);
2998          checkCompletedNormally(f, v1);
2999      }}
3000  
3001      /**
3002       * thenCompose result completes exceptionally if source cancelled
3003       */
3004 <    public void testThenCompose_sourceCancelled1() {
3004 >    public void testThenCompose_sourceCancelled() {
3005          for (ExecutionMode m : ExecutionMode.values())
3006 +        for (boolean createIncomplete : new boolean[] { true, false })
3007          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3008      {
3009          final CompletableFuture<Integer> f = new CompletableFuture<>();
3010 <        final CompletableFutureInc r = new CompletableFutureInc();
3011 <        final CompletableFuture<Integer> g = f.thenCompose(r);
3012 <        assertTrue(f.cancel(mayInterruptIfRunning));
3013 <        checkCompletedWithWrappedCancellationException(g);
3014 <        checkCancelled(f);
3015 <    }}
3010 >        final CompletableFutureInc r = new CompletableFutureInc(m);
3011 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
3012 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3013 >        if (createIncomplete) {
3014 >            checkIncomplete(g);
3015 >            assertTrue(f.cancel(mayInterruptIfRunning));
3016 >        }
3017  
2941    public void testThenCompose_sourceCancelled2() {
2942        for (ExecutionMode m : ExecutionMode.values())
2943        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2944    {
2945        final CompletableFuture<Integer> f = new CompletableFuture<>();
2946        assertTrue(f.cancel(mayInterruptIfRunning));
2947        final CompletableFutureInc r = new CompletableFutureInc();
2948        final CompletableFuture<Integer> g = f.thenCompose(r);
3018          checkCompletedWithWrappedCancellationException(g);
3019          checkCancelled(f);
3020      }}
3021  
2953    // asyncs
2954
2955    /**
2956     * thenRunAsync result completes normally after normal completion of source
2957     */
2958    public void testThenRunAsync() {
2959        CompletableFuture<Integer> f = new CompletableFuture<>();
2960        Noop r = new Noop();
2961        CompletableFuture<Void> g = f.thenRunAsync(r);
2962        f.complete(null);
2963        checkCompletedNormally(g, null);
2964
2965        // reordered version
2966        f = new CompletableFuture<>();
2967        f.complete(null);
2968        r = new Noop();
2969        g = f.thenRunAsync(r);
2970        checkCompletedNormally(g, null);
2971    }
2972
2973    /**
2974     * thenRunAsync result completes exceptionally after exceptional
2975     * completion of source
2976     */
2977    public void testThenRunAsync2() {
2978        CompletableFuture<Integer> f = new CompletableFuture<>();
2979        Noop r = new Noop();
2980        CompletableFuture<Void> g = f.thenRunAsync(r);
2981        f.completeExceptionally(new CFException());
2982        try {
2983            g.join();
2984            shouldThrow();
2985        } catch (CompletionException success) {}
2986        checkCompletedWithWrappedCFException(g);
2987    }
2988
2989    /**
2990     * thenRunAsync result completes exceptionally if action does
2991     */
2992    public void testThenRunAsync3() {
2993        CompletableFuture<Integer> f = new CompletableFuture<>();
2994        FailingNoop r = new FailingNoop();
2995        CompletableFuture<Void> g = f.thenRunAsync(r);
2996        f.complete(null);
2997        checkCompletedWithWrappedCFException(g);
2998    }
2999
3000    /**
3001     * thenRunAsync result completes exceptionally if source cancelled
3002     */
3003    public void testThenRunAsync4() {
3004        CompletableFuture<Integer> f = new CompletableFuture<>();
3005        Noop r = new Noop();
3006        CompletableFuture<Void> g = f.thenRunAsync(r);
3007        assertTrue(f.cancel(true));
3008        checkCompletedWithWrappedCancellationException(g);
3009    }
3010
3011    /**
3012     * thenApplyAsync result completes normally after normal completion of source
3013     */
3014    public void testThenApplyAsync() {
3015        CompletableFuture<Integer> f = new CompletableFuture<>();
3016        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
3017        f.complete(one);
3018        checkCompletedNormally(g, two);
3019    }
3020
3021    /**
3022     * thenApplyAsync result completes exceptionally after exceptional
3023     * completion of source
3024     */
3025    public void testThenApplyAsync2() {
3026        CompletableFuture<Integer> f = new CompletableFuture<>();
3027        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
3028        f.completeExceptionally(new CFException());
3029        checkCompletedWithWrappedCFException(g);
3030    }
3031
3032    /**
3033     * thenApplyAsync result completes exceptionally if action does
3034     */
3035    public void testThenApplyAsync3() {
3036        CompletableFuture<Integer> f = new CompletableFuture<>();
3037        FailingFunction r = new FailingFunction();
3038        CompletableFuture<Integer> g = f.thenApplyAsync(r);
3039        f.complete(null);
3040        checkCompletedWithWrappedCFException(g);
3041    }
3042
3043    /**
3044     * thenApplyAsync result completes exceptionally if source cancelled
3045     */
3046    public void testThenApplyAsync4() {
3047        CompletableFuture<Integer> f = new CompletableFuture<>();
3048        CompletableFuture<Integer> g = f.thenApplyAsync(inc);
3049        assertTrue(f.cancel(true));
3050        checkCompletedWithWrappedCancellationException(g);
3051    }
3052
3053    /**
3054     * thenAcceptAsync result completes normally after normal
3055     * completion of source
3056     */
3057    public void testThenAcceptAsync() {
3058        CompletableFuture<Integer> f = new CompletableFuture<>();
3059        IncAction r = new IncAction();
3060        CompletableFuture<Void> g = f.thenAcceptAsync(r);
3061        f.complete(one);
3062        checkCompletedNormally(g, null);
3063        assertEquals(r.value, (Integer) 2);
3064    }
3065
3066    /**
3067     * thenAcceptAsync result completes exceptionally after exceptional
3068     * completion of source
3069     */
3070    public void testThenAcceptAsync2() {
3071        CompletableFuture<Integer> f = new CompletableFuture<>();
3072        IncAction r = new IncAction();
3073        CompletableFuture<Void> g = f.thenAcceptAsync(r);
3074        f.completeExceptionally(new CFException());
3075        checkCompletedWithWrappedCFException(g);
3076    }
3077
3078    /**
3079     * thenAcceptAsync result completes exceptionally if action does
3080     */
3081    public void testThenAcceptAsync3() {
3082        CompletableFuture<Integer> f = new CompletableFuture<>();
3083        FailingConsumer r = new FailingConsumer();
3084        CompletableFuture<Void> g = f.thenAcceptAsync(r);
3085        f.complete(null);
3086        checkCompletedWithWrappedCFException(g);
3087    }
3088
3089    /**
3090     * thenAcceptAsync result completes exceptionally if source cancelled
3091     */
3092    public void testThenAcceptAsync4() {
3093        CompletableFuture<Integer> f = new CompletableFuture<>();
3094        IncAction r = new IncAction();
3095        CompletableFuture<Void> g = f.thenAcceptAsync(r);
3096        assertTrue(f.cancel(true));
3097        checkCompletedWithWrappedCancellationException(g);
3098    }
3099
3100    // async with explicit executors
3101
3102    /**
3103     * thenRunAsync result completes normally after normal completion of source
3104     */
3105    public void testThenRunAsyncE() {
3106        CompletableFuture<Integer> f = new CompletableFuture<>();
3107        Noop r = new Noop();
3108        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
3109        f.complete(null);
3110        checkCompletedNormally(g, null);
3111
3112        // reordered version
3113        f = new CompletableFuture<>();
3114        f.complete(null);
3115        r = new Noop();
3116        g = f.thenRunAsync(r, new ThreadExecutor());
3117        checkCompletedNormally(g, null);
3118    }
3119
3120    /**
3121     * thenRunAsync result completes exceptionally after exceptional
3122     * completion of source
3123     */
3124    public void testThenRunAsync2E() {
3125        CompletableFuture<Integer> f = new CompletableFuture<>();
3126        Noop r = new Noop();
3127        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
3128        f.completeExceptionally(new CFException());
3129        try {
3130            g.join();
3131            shouldThrow();
3132        } catch (CompletionException success) {}
3133        checkCompletedWithWrappedCFException(g);
3134    }
3135
3136    /**
3137     * thenRunAsync result completes exceptionally if action does
3138     */
3139    public void testThenRunAsync3E() {
3140        CompletableFuture<Integer> f = new CompletableFuture<>();
3141        FailingNoop r = new FailingNoop();
3142        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
3143        f.complete(null);
3144        checkCompletedWithWrappedCFException(g);
3145    }
3146
3147    /**
3148     * thenRunAsync result completes exceptionally if source cancelled
3149     */
3150    public void testThenRunAsync4E() {
3151        CompletableFuture<Integer> f = new CompletableFuture<>();
3152        Noop r = new Noop();
3153        CompletableFuture<Void> g = f.thenRunAsync(r, new ThreadExecutor());
3154        assertTrue(f.cancel(true));
3155        checkCompletedWithWrappedCancellationException(g);
3156    }
3157
3158    /**
3159     * thenApplyAsync result completes normally after normal completion of source
3160     */
3161    public void testThenApplyAsyncE() {
3162        CompletableFuture<Integer> f = new CompletableFuture<>();
3163        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
3164        f.complete(one);
3165        checkCompletedNormally(g, two);
3166    }
3167
3168    /**
3169     * thenApplyAsync result completes exceptionally after exceptional
3170     * completion of source
3171     */
3172    public void testThenApplyAsync2E() {
3173        CompletableFuture<Integer> f = new CompletableFuture<>();
3174        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
3175        f.completeExceptionally(new CFException());
3176        checkCompletedWithWrappedCFException(g);
3177    }
3178
3179    /**
3180     * thenApplyAsync result completes exceptionally if action does
3181     */
3182    public void testThenApplyAsync3E() {
3183        CompletableFuture<Integer> f = new CompletableFuture<>();
3184        FailingFunction r = new FailingFunction();
3185        CompletableFuture<Integer> g = f.thenApplyAsync(r, new ThreadExecutor());
3186        f.complete(null);
3187        checkCompletedWithWrappedCFException(g);
3188    }
3189
3190    /**
3191     * thenApplyAsync result completes exceptionally if source cancelled
3192     */
3193    public void testThenApplyAsync4E() {
3194        CompletableFuture<Integer> f = new CompletableFuture<>();
3195        CompletableFuture<Integer> g = f.thenApplyAsync(inc, new ThreadExecutor());
3196        assertTrue(f.cancel(true));
3197        checkCompletedWithWrappedCancellationException(g);
3198    }
3199
3200    /**
3201     * thenAcceptAsync result completes normally after normal
3202     * completion of source
3203     */
3204    public void testThenAcceptAsyncE() {
3205        CompletableFuture<Integer> f = new CompletableFuture<>();
3206        IncAction r = new IncAction();
3207        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3208        f.complete(one);
3209        checkCompletedNormally(g, null);
3210        assertEquals(r.value, (Integer) 2);
3211    }
3212
3022      /**
3023 <     * thenAcceptAsync result completes exceptionally after exceptional
3215 <     * completion of source
3216 <     */
3217 <    public void testThenAcceptAsync2E() {
3218 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3219 <        IncAction r = new IncAction();
3220 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3221 <        f.completeExceptionally(new CFException());
3222 <        checkCompletedWithWrappedCFException(g);
3223 <    }
3224 <
3225 <    /**
3226 <     * thenAcceptAsync result completes exceptionally if action does
3023 >     * thenCompose result completes exceptionally if the result of the action does
3024       */
3025 <    public void testThenAcceptAsync3E() {
3026 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3027 <        FailingConsumer r = new FailingConsumer();
3028 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3029 <        f.complete(null);
3030 <        checkCompletedWithWrappedCFException(g);
3031 <    }
3025 >    public void testThenCompose_actionReturnsFailingFuture() {
3026 >        for (ExecutionMode m : ExecutionMode.values())
3027 >        for (int order = 0; order < 6; order++)
3028 >        for (Integer v1 : new Integer[] { 1, null })
3029 >    {
3030 >        final CFException ex = new CFException();
3031 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
3032 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
3033 >        final CompletableFuture<Integer> h;
3034 >        // Test all permutations of orders
3035 >        switch (order) {
3036 >        case 0:
3037 >            assertTrue(f.complete(v1));
3038 >            assertTrue(g.completeExceptionally(ex));
3039 >            h = m.thenCompose(f, (x -> g));
3040 >            break;
3041 >        case 1:
3042 >            assertTrue(f.complete(v1));
3043 >            h = m.thenCompose(f, (x -> g));
3044 >            assertTrue(g.completeExceptionally(ex));
3045 >            break;
3046 >        case 2:
3047 >            assertTrue(g.completeExceptionally(ex));
3048 >            assertTrue(f.complete(v1));
3049 >            h = m.thenCompose(f, (x -> g));
3050 >            break;
3051 >        case 3:
3052 >            assertTrue(g.completeExceptionally(ex));
3053 >            h = m.thenCompose(f, (x -> g));
3054 >            assertTrue(f.complete(v1));
3055 >            break;
3056 >        case 4:
3057 >            h = m.thenCompose(f, (x -> g));
3058 >            assertTrue(f.complete(v1));
3059 >            assertTrue(g.completeExceptionally(ex));
3060 >            break;
3061 >        case 5:
3062 >            h = m.thenCompose(f, (x -> g));
3063 >            assertTrue(f.complete(v1));
3064 >            assertTrue(g.completeExceptionally(ex));
3065 >            break;
3066 >        default: throw new AssertionError();
3067 >        }
3068  
3069 <    /**
3070 <     * thenAcceptAsync result completes exceptionally if source cancelled
3071 <     */
3072 <    public void testThenAcceptAsync4E() {
3240 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3241 <        IncAction r = new IncAction();
3242 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3243 <        assertTrue(f.cancel(true));
3244 <        checkCompletedWithWrappedCancellationException(g);
3245 <    }
3069 >        checkCompletedExceptionally(g, ex);
3070 >        checkCompletedWithWrappedException(h, ex);
3071 >        checkCompletedNormally(f, v1);
3072 >    }}
3073  
3074      // other static methods
3075  
# Line 3260 | Line 3087 | public class CompletableFutureTest exten
3087       * when all components complete normally
3088       */
3089      public void testAllOf_normal() throws Exception {
3090 <        for (int k = 1; k < 20; ++k) {
3091 <            CompletableFuture<Integer>[] fs = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3092 <            for (int i = 0; i < k; ++i)
3090 >        for (int k = 1; k < 10; k++) {
3091 >            CompletableFuture<Integer>[] fs
3092 >                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3093 >            for (int i = 0; i < k; i++)
3094 >                fs[i] = new CompletableFuture<>();
3095 >            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3096 >            for (int i = 0; i < k; i++) {
3097 >                checkIncomplete(f);
3098 >                checkIncomplete(CompletableFuture.allOf(fs));
3099 >                fs[i].complete(one);
3100 >            }
3101 >            checkCompletedNormally(f, null);
3102 >            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3103 >        }
3104 >    }
3105 >
3106 >    public void testAllOf_normal_backwards() throws Exception {
3107 >        for (int k = 1; k < 10; k++) {
3108 >            CompletableFuture<Integer>[] fs
3109 >                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3110 >            for (int i = 0; i < k; i++)
3111                  fs[i] = new CompletableFuture<>();
3112              CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3113 <            for (int i = 0; i < k; ++i) {
3113 >            for (int i = k - 1; i >= 0; i--) {
3114                  checkIncomplete(f);
3115                  checkIncomplete(CompletableFuture.allOf(fs));
3116                  fs[i].complete(one);
# Line 3275 | Line 3120 | public class CompletableFutureTest exten
3120          }
3121      }
3122  
3123 +    public void testAllOf_exceptional() throws Exception {
3124 +        for (int k = 1; k < 10; k++) {
3125 +            CompletableFuture<Integer>[] fs
3126 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3127 +            CFException ex = new CFException();
3128 +            for (int i = 0; i < k; i++)
3129 +                fs[i] = new CompletableFuture<>();
3130 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3131 +            for (int i = 0; i < k; i++) {
3132 +                checkIncomplete(f);
3133 +                checkIncomplete(CompletableFuture.allOf(fs));
3134 +                if (i != k / 2) {
3135 +                    fs[i].complete(i);
3136 +                    checkCompletedNormally(fs[i], i);
3137 +                } else {
3138 +                    fs[i].completeExceptionally(ex);
3139 +                    checkCompletedExceptionally(fs[i], ex);
3140 +                }
3141 +            }
3142 +            checkCompletedWithWrappedException(f, ex);
3143 +            checkCompletedWithWrappedException(CompletableFuture.allOf(fs), ex);
3144 +        }
3145 +    }
3146 +
3147      /**
3148       * anyOf(no component futures) returns an incomplete future
3149       */
3150      public void testAnyOf_empty() throws Exception {
3151 +        for (Integer v1 : new Integer[] { 1, null })
3152 +    {
3153          CompletableFuture<Object> f = CompletableFuture.anyOf();
3154          checkIncomplete(f);
3155 <    }
3155 >
3156 >        f.complete(v1);
3157 >        checkCompletedNormally(f, v1);
3158 >    }}
3159  
3160      /**
3161       * anyOf returns a future completed normally with a value when
3162       * a component future does
3163       */
3164      public void testAnyOf_normal() throws Exception {
3165 <        for (int k = 0; k < 10; ++k) {
3165 >        for (int k = 0; k < 10; k++) {
3166              CompletableFuture[] fs = new CompletableFuture[k];
3167 <            for (int i = 0; i < k; ++i)
3167 >            for (int i = 0; i < k; i++)
3168                  fs[i] = new CompletableFuture<>();
3169              CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3170              checkIncomplete(f);
3171 <            for (int i = 0; i < k; ++i) {
3172 <                fs[i].complete(one);
3173 <                checkCompletedNormally(f, one);
3174 <                checkCompletedNormally(CompletableFuture.anyOf(fs), one);
3171 >            for (int i = 0; i < k; i++) {
3172 >                fs[i].complete(i);
3173 >                checkCompletedNormally(f, 0);
3174 >                int x = (int) CompletableFuture.anyOf(fs).join();
3175 >                assertTrue(0 <= x && x <= i);
3176 >            }
3177 >        }
3178 >    }
3179 >    public void testAnyOf_normal_backwards() throws Exception {
3180 >        for (int k = 0; k < 10; k++) {
3181 >            CompletableFuture[] fs = new CompletableFuture[k];
3182 >            for (int i = 0; i < k; i++)
3183 >                fs[i] = new CompletableFuture<>();
3184 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3185 >            checkIncomplete(f);
3186 >            for (int i = k - 1; i >= 0; i--) {
3187 >                fs[i].complete(i);
3188 >                checkCompletedNormally(f, k - 1);
3189 >                int x = (int) CompletableFuture.anyOf(fs).join();
3190 >                assertTrue(i <= x && x <= k - 1);
3191              }
3192          }
3193      }
# Line 3306 | Line 3196 | public class CompletableFutureTest exten
3196       * anyOf result completes exceptionally when any component does.
3197       */
3198      public void testAnyOf_exceptional() throws Exception {
3199 <        for (int k = 0; k < 10; ++k) {
3199 >        for (int k = 0; k < 10; k++) {
3200 >            CompletableFuture[] fs = new CompletableFuture[k];
3201 >            CFException[] exs = new CFException[k];
3202 >            for (int i = 0; i < k; i++) {
3203 >                fs[i] = new CompletableFuture<>();
3204 >                exs[i] = new CFException();
3205 >            }
3206 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3207 >            checkIncomplete(f);
3208 >            for (int i = 0; i < k; i++) {
3209 >                fs[i].completeExceptionally(exs[i]);
3210 >                checkCompletedWithWrappedException(f, exs[0]);
3211 >                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3212 >            }
3213 >        }
3214 >    }
3215 >
3216 >    public void testAnyOf_exceptional_backwards() throws Exception {
3217 >        for (int k = 0; k < 10; k++) {
3218              CompletableFuture[] fs = new CompletableFuture[k];
3219 <            for (int i = 0; i < k; ++i)
3219 >            CFException[] exs = new CFException[k];
3220 >            for (int i = 0; i < k; i++) {
3221                  fs[i] = new CompletableFuture<>();
3222 +                exs[i] = new CFException();
3223 +            }
3224              CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3225              checkIncomplete(f);
3226 <            for (int i = 0; i < k; ++i) {
3227 <                fs[i].completeExceptionally(new CFException());
3228 <                checkCompletedWithWrappedCFException(f);
3226 >            for (int i = k - 1; i >= 0; i--) {
3227 >                fs[i].completeExceptionally(exs[i]);
3228 >                checkCompletedWithWrappedException(f, exs[k - 1]);
3229                  checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3230              }
3231          }
# Line 3327 | Line 3238 | public class CompletableFutureTest exten
3238          CompletableFuture<Integer> f = new CompletableFuture<>();
3239          CompletableFuture<Integer> g = new CompletableFuture<>();
3240          CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
3330        CompletableFuture<?> h;
3241          ThreadExecutor exec = new ThreadExecutor();
3242  
3243          Runnable[] throwingActions = {
3244              () -> CompletableFuture.supplyAsync(null),
3245              () -> CompletableFuture.supplyAsync(null, exec),
3246 <            () -> CompletableFuture.supplyAsync(supplyOne, null),
3246 >            () -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.SYNC, 42), null),
3247  
3248              () -> CompletableFuture.runAsync(null),
3249              () -> CompletableFuture.runAsync(null, exec),
# Line 3343 | Line 3253 | public class CompletableFutureTest exten
3253  
3254              () -> f.thenApply(null),
3255              () -> f.thenApplyAsync(null),
3256 <            () -> f.thenApplyAsync((x) -> x, null),
3256 >            () -> f.thenApplyAsync(x -> x, null),
3257              () -> f.thenApplyAsync(null, exec),
3258  
3259              () -> f.thenAccept(null),
3260              () -> f.thenAcceptAsync(null),
3261 <            () -> f.thenAcceptAsync((x) -> {} , null),
3261 >            () -> f.thenAcceptAsync(x -> {} , null),
3262              () -> f.thenAcceptAsync(null, exec),
3263  
3264              () -> f.thenRun(null),
# Line 3383 | Line 3293 | public class CompletableFutureTest exten
3293              () -> f.applyToEither(g, null),
3294              () -> f.applyToEitherAsync(g, null),
3295              () -> f.applyToEitherAsync(g, null, exec),
3296 <            () -> f.applyToEither(nullFuture, (x) -> x),
3297 <            () -> f.applyToEitherAsync(nullFuture, (x) -> x),
3298 <            () -> f.applyToEitherAsync(nullFuture, (x) -> x, exec),
3299 <            () -> f.applyToEitherAsync(g, (x) -> x, null),
3296 >            () -> f.applyToEither(nullFuture, x -> x),
3297 >            () -> f.applyToEitherAsync(nullFuture, x -> x),
3298 >            () -> f.applyToEitherAsync(nullFuture, x -> x, exec),
3299 >            () -> f.applyToEitherAsync(g, x -> x, null),
3300  
3301              () -> f.acceptEither(g, null),
3302              () -> f.acceptEitherAsync(g, null),
3303              () -> f.acceptEitherAsync(g, null, exec),
3304 <            () -> f.acceptEither(nullFuture, (x) -> {}),
3305 <            () -> f.acceptEitherAsync(nullFuture, (x) -> {}),
3306 <            () -> f.acceptEitherAsync(nullFuture, (x) -> {}, exec),
3307 <            () -> f.acceptEitherAsync(g, (x) -> {}, null),
3304 >            () -> f.acceptEither(nullFuture, x -> {}),
3305 >            () -> f.acceptEitherAsync(nullFuture, x -> {}),
3306 >            () -> f.acceptEitherAsync(nullFuture, x -> {}, exec),
3307 >            () -> f.acceptEitherAsync(g, x -> {}, null),
3308  
3309              () -> f.runAfterEither(g, null),
3310              () -> f.runAfterEitherAsync(g, null),
# Line 3406 | Line 3316 | public class CompletableFutureTest exten
3316  
3317              () -> f.thenCompose(null),
3318              () -> f.thenComposeAsync(null),
3319 <            () -> f.thenComposeAsync(new CompletableFutureInc(), null),
3319 >            () -> f.thenComposeAsync(new CompletableFutureInc(ExecutionMode.EXECUTOR), null),
3320              () -> f.thenComposeAsync(null, exec),
3321  
3322              () -> f.exceptionally(null),
# Line 3424 | Line 3334 | public class CompletableFutureTest exten
3334              () -> CompletableFuture.anyOf(null, f),
3335  
3336              () -> f.obtrudeException(null),
3337 +
3338 +            () -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3339 +            () -> CompletableFuture.delayedExecutor(1L, null, exec),
3340 +            () -> CompletableFuture.delayedExecutor(1L, null),
3341 +
3342 +            () -> f.orTimeout(1L, null),
3343 +            () -> f.completeOnTimeout(42, 1L, null),
3344 +
3345 +            () -> CompletableFuture.failedFuture(null),
3346 +            () -> CompletableFuture.failedStage(null),
3347          };
3348  
3349          assertThrows(NullPointerException.class, throwingActions);
# Line 3431 | Line 3351 | public class CompletableFutureTest exten
3351      }
3352  
3353      /**
3354 +     * Test submissions to an executor that rejects all tasks.
3355 +     */
3356 +    public void testRejectingExecutor() {
3357 +        for (Integer v : new Integer[] { 1, null })
3358 +    {
3359 +        final CountingRejectingExecutor e = new CountingRejectingExecutor();
3360 +
3361 +        final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3362 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3363 +
3364 +        List<CompletableFuture<?>> futures = new ArrayList<>();
3365 +
3366 +        List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3367 +        srcs.add(complete);
3368 +        srcs.add(incomplete);
3369 +
3370 +        for (CompletableFuture<Integer> src : srcs) {
3371 +            List<CompletableFuture<?>> fs = new ArrayList<>();
3372 +            fs.add(src.thenRunAsync(() -> {}, e));
3373 +            fs.add(src.thenAcceptAsync(z -> {}, e));
3374 +            fs.add(src.thenApplyAsync(z -> z, e));
3375 +
3376 +            fs.add(src.thenCombineAsync(src, (x, y) -> x, e));
3377 +            fs.add(src.thenAcceptBothAsync(src, (x, y) -> {}, e));
3378 +            fs.add(src.runAfterBothAsync(src, () -> {}, e));
3379 +
3380 +            fs.add(src.applyToEitherAsync(src, z -> z, e));
3381 +            fs.add(src.acceptEitherAsync(src, z -> {}, e));
3382 +            fs.add(src.runAfterEitherAsync(src, () -> {}, e));
3383 +
3384 +            fs.add(src.thenComposeAsync(z -> null, e));
3385 +            fs.add(src.whenCompleteAsync((z, t) -> {}, e));
3386 +            fs.add(src.handleAsync((z, t) -> null, e));
3387 +
3388 +            for (CompletableFuture<?> future : fs) {
3389 +                if (src.isDone())
3390 +                    checkCompletedWithWrappedException(future, e.ex);
3391 +                else
3392 +                    checkIncomplete(future);
3393 +            }
3394 +            futures.addAll(fs);
3395 +        }
3396 +
3397 +        {
3398 +            List<CompletableFuture<?>> fs = new ArrayList<>();
3399 +
3400 +            fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3401 +            fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3402 +
3403 +            fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3404 +            fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3405 +
3406 +            fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3407 +            fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3408 +
3409 +            for (CompletableFuture<?> future : fs)
3410 +                checkIncomplete(future);
3411 +            futures.addAll(fs);
3412 +        }
3413 +
3414 +        {
3415 +            List<CompletableFuture<?>> fs = new ArrayList<>();
3416 +
3417 +            fs.add(complete.applyToEitherAsync(incomplete, z -> z, e));
3418 +            fs.add(incomplete.applyToEitherAsync(complete, z -> z, e));
3419 +
3420 +            fs.add(complete.acceptEitherAsync(incomplete, z -> {}, e));
3421 +            fs.add(incomplete.acceptEitherAsync(complete, z -> {}, e));
3422 +
3423 +            fs.add(complete.runAfterEitherAsync(incomplete, () -> {}, e));
3424 +            fs.add(incomplete.runAfterEitherAsync(complete, () -> {}, e));
3425 +
3426 +            for (CompletableFuture<?> future : fs)
3427 +                checkCompletedWithWrappedException(future, e.ex);
3428 +            futures.addAll(fs);
3429 +        }
3430 +
3431 +        incomplete.complete(v);
3432 +
3433 +        for (CompletableFuture<?> future : futures)
3434 +            checkCompletedWithWrappedException(future, e.ex);
3435 +
3436 +        assertEquals(futures.size(), e.count.get());
3437 +    }}
3438 +
3439 +    /**
3440 +     * Test submissions to an executor that rejects all tasks, but
3441 +     * should never be invoked because the dependent future is
3442 +     * explicitly completed.
3443 +     */
3444 +    public void testRejectingExecutorNeverInvoked() {
3445 +        for (Integer v : new Integer[] { 1, null })
3446 +    {
3447 +        final CountingRejectingExecutor e = new CountingRejectingExecutor();
3448 +
3449 +        final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3450 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3451 +
3452 +        List<CompletableFuture<?>> futures = new ArrayList<>();
3453 +
3454 +        List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3455 +        srcs.add(complete);
3456 +        srcs.add(incomplete);
3457 +
3458 +        List<CompletableFuture<?>> fs = new ArrayList<>();
3459 +        fs.add(incomplete.thenRunAsync(() -> {}, e));
3460 +        fs.add(incomplete.thenAcceptAsync(z -> {}, e));
3461 +        fs.add(incomplete.thenApplyAsync(z -> z, e));
3462 +
3463 +        fs.add(incomplete.thenCombineAsync(incomplete, (x, y) -> x, e));
3464 +        fs.add(incomplete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3465 +        fs.add(incomplete.runAfterBothAsync(incomplete, () -> {}, e));
3466 +
3467 +        fs.add(incomplete.applyToEitherAsync(incomplete, z -> z, e));
3468 +        fs.add(incomplete.acceptEitherAsync(incomplete, z -> {}, e));
3469 +        fs.add(incomplete.runAfterEitherAsync(incomplete, () -> {}, e));
3470 +
3471 +        fs.add(incomplete.thenComposeAsync(z -> null, e));
3472 +        fs.add(incomplete.whenCompleteAsync((z, t) -> {}, e));
3473 +        fs.add(incomplete.handleAsync((z, t) -> null, e));
3474 +
3475 +        fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3476 +        fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3477 +
3478 +        fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3479 +        fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3480 +
3481 +        fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3482 +        fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3483 +
3484 +        for (CompletableFuture<?> future : fs)
3485 +            checkIncomplete(future);
3486 +
3487 +        for (CompletableFuture<?> future : fs)
3488 +            future.complete(null);
3489 +
3490 +        incomplete.complete(v);
3491 +
3492 +        for (CompletableFuture<?> future : fs)
3493 +            checkCompletedNormally(future, null);
3494 +
3495 +        assertEquals(0, e.count.get());
3496 +    }}
3497 +
3498 +    /**
3499       * toCompletableFuture returns this CompletableFuture.
3500       */
3501      public void testToCompletableFuture() {
# Line 3438 | Line 3503 | public class CompletableFutureTest exten
3503          assertSame(f, f.toCompletableFuture());
3504      }
3505  
3506 +    // jdk9
3507 +
3508      /**
3509 <     * whenComplete action executes on normal completion, propagating
3443 <     * source result.
3509 >     * newIncompleteFuture returns an incomplete CompletableFuture
3510       */
3511 <    public void testWhenComplete_normalCompletion1() {
3512 <        for (ExecutionMode m : ExecutionMode.values())
3511 >    public void testNewIncompleteFuture() {
3512 >        for (Integer v1 : new Integer[] { 1, null })
3513 >    {
3514 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3515 >        CompletableFuture<Integer> g = f.newIncompleteFuture();
3516 >        checkIncomplete(f);
3517 >        checkIncomplete(g);
3518 >        f.complete(v1);
3519 >        checkCompletedNormally(f, v1);
3520 >        checkIncomplete(g);
3521 >        g.complete(v1);
3522 >        checkCompletedNormally(g, v1);
3523 >        assertSame(g.getClass(), CompletableFuture.class);
3524 >    }}
3525 >
3526 >    /**
3527 >     * completedStage returns a completed CompletionStage
3528 >     */
3529 >    public void testCompletedStage() {
3530 >        AtomicInteger x = new AtomicInteger(0);
3531 >        AtomicReference<Throwable> r = new AtomicReference<>();
3532 >        CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3533 >        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3534 >        assertEquals(x.get(), 1);
3535 >        assertNull(r.get());
3536 >    }
3537 >
3538 >    /**
3539 >     * defaultExecutor by default returns the commonPool if
3540 >     * it supports more than one thread.
3541 >     */
3542 >    public void testDefaultExecutor() {
3543 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3544 >        Executor e = f.defaultExecutor();
3545 >        Executor c = ForkJoinPool.commonPool();
3546 >        if (ForkJoinPool.getCommonPoolParallelism() > 1)
3547 >            assertSame(e, c);
3548 >        else
3549 >            assertNotSame(e, c);
3550 >    }
3551 >
3552 >    /**
3553 >     * failedFuture returns a CompletableFuture completed
3554 >     * exceptionally with the given Exception
3555 >     */
3556 >    public void testFailedFuture() {
3557 >        CFException ex = new CFException();
3558 >        CompletableFuture<Integer> f = CompletableFuture.failedFuture(ex);
3559 >        checkCompletedExceptionally(f, ex);
3560 >    }
3561 >
3562 >    /**
3563 >     * failedFuture(null) throws NPE
3564 >     */
3565 >    public void testFailedFuture_null() {
3566 >        try {
3567 >            CompletableFuture<Integer> f = CompletableFuture.failedFuture(null);
3568 >            shouldThrow();
3569 >        } catch (NullPointerException success) {}
3570 >    }
3571 >
3572 >    /**
3573 >     * copy returns a CompletableFuture that is completed normally,
3574 >     * with the same value, when source is.
3575 >     */
3576 >    public void testCopy_normalCompletion() {
3577          for (boolean createIncomplete : new boolean[] { true, false })
3578          for (Integer v1 : new Integer[] { 1, null })
3579      {
3580 <        final AtomicInteger a = new AtomicInteger(0);
3581 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
3582 <        if (!createIncomplete) f.complete(v1);
3583 <        final CompletableFuture<Integer> g = m.whenComplete
3584 <            (f,
3585 <             (Integer x, Throwable t) -> {
3586 <                threadAssertSame(x, v1);
3587 <                threadAssertNull(t);
3588 <                a.getAndIncrement();
3589 <            });
3590 <        if (createIncomplete) f.complete(v1);
3580 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3581 >        if (!createIncomplete) assertTrue(f.complete(v1));
3582 >        CompletableFuture<Integer> g = f.copy();
3583 >        if (createIncomplete) {
3584 >            checkIncomplete(f);
3585 >            checkIncomplete(g);
3586 >            assertTrue(f.complete(v1));
3587 >        }
3588 >        checkCompletedNormally(f, v1);
3589 >        checkCompletedNormally(g, v1);
3590 >    }}
3591 >
3592 >    /**
3593 >     * copy returns a CompletableFuture that is completed exceptionally
3594 >     * when source is.
3595 >     */
3596 >    public void testCopy_exceptionalCompletion() {
3597 >        for (boolean createIncomplete : new boolean[] { true, false })
3598 >    {
3599 >        CFException ex = new CFException();
3600 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3601 >        if (!createIncomplete) f.completeExceptionally(ex);
3602 >        CompletableFuture<Integer> g = f.copy();
3603 >        if (createIncomplete) {
3604 >            checkIncomplete(f);
3605 >            checkIncomplete(g);
3606 >            f.completeExceptionally(ex);
3607 >        }
3608 >        checkCompletedExceptionally(f, ex);
3609 >        checkCompletedWithWrappedException(g, ex);
3610 >    }}
3611 >
3612 >    /**
3613 >     * Completion of a copy does not complete its source.
3614 >     */
3615 >    public void testCopy_oneWayPropagation() {
3616 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3617 >        assertTrue(f.copy().complete(1));
3618 >        assertTrue(f.copy().complete(null));
3619 >        assertTrue(f.copy().cancel(true));
3620 >        assertTrue(f.copy().cancel(false));
3621 >        assertTrue(f.copy().completeExceptionally(new CFException()));
3622 >        checkIncomplete(f);
3623 >    }
3624  
3625 +    /**
3626 +     * minimalCompletionStage returns a CompletableFuture that is
3627 +     * completed normally, with the same value, when source is.
3628 +     */
3629 +    public void testMinimalCompletionStage() {
3630 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3631 +        CompletionStage<Integer> g = f.minimalCompletionStage();
3632 +        AtomicInteger x = new AtomicInteger(0);
3633 +        AtomicReference<Throwable> r = new AtomicReference<>();
3634 +        checkIncomplete(f);
3635 +        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3636 +        f.complete(1);
3637 +        checkCompletedNormally(f, 1);
3638 +        assertEquals(x.get(), 1);
3639 +        assertNull(r.get());
3640 +    }
3641 +
3642 +    /**
3643 +     * minimalCompletionStage returns a CompletableFuture that is
3644 +     * completed exceptionally when source is.
3645 +     */
3646 +    public void testMinimalCompletionStage2() {
3647 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3648 +        CompletionStage<Integer> g = f.minimalCompletionStage();
3649 +        AtomicInteger x = new AtomicInteger(0);
3650 +        AtomicReference<Throwable> r = new AtomicReference<>();
3651 +        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3652 +        checkIncomplete(f);
3653 +        CFException ex = new CFException();
3654 +        f.completeExceptionally(ex);
3655 +        checkCompletedExceptionally(f, ex);
3656 +        assertEquals(x.get(), 0);
3657 +        assertEquals(r.get().getCause(), ex);
3658 +    }
3659 +
3660 +    /**
3661 +     * failedStage returns a CompletionStage completed
3662 +     * exceptionally with the given Exception
3663 +     */
3664 +    public void testFailedStage() {
3665 +        CFException ex = new CFException();
3666 +        CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3667 +        AtomicInteger x = new AtomicInteger(0);
3668 +        AtomicReference<Throwable> r = new AtomicReference<>();
3669 +        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3670 +        assertEquals(x.get(), 0);
3671 +        assertEquals(r.get(), ex);
3672 +    }
3673 +
3674 +    /**
3675 +     * completeAsync completes with value of given supplier
3676 +     */
3677 +    public void testCompleteAsync() {
3678 +        for (Integer v1 : new Integer[] { 1, null })
3679 +    {
3680 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3681 +        f.completeAsync(() -> v1);
3682 +        f.join();
3683 +        checkCompletedNormally(f, v1);
3684 +    }}
3685 +
3686 +    /**
3687 +     * completeAsync completes exceptionally if given supplier throws
3688 +     */
3689 +    public void testCompleteAsync2() {
3690 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3691 +        CFException ex = new CFException();
3692 +        f.completeAsync(() -> { throw ex; });
3693 +        try {
3694 +            f.join();
3695 +            shouldThrow();
3696 +        } catch (CompletionException success) {}
3697 +        checkCompletedWithWrappedException(f, ex);
3698 +    }
3699 +
3700 +    /**
3701 +     * completeAsync with given executor completes with value of given supplier
3702 +     */
3703 +    public void testCompleteAsync3() {
3704 +        for (Integer v1 : new Integer[] { 1, null })
3705 +    {
3706 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3707 +        ThreadExecutor executor = new ThreadExecutor();
3708 +        f.completeAsync(() -> v1, executor);
3709 +        assertSame(v1, f.join());
3710 +        checkCompletedNormally(f, v1);
3711 +        assertEquals(1, executor.count.get());
3712 +    }}
3713 +
3714 +    /**
3715 +     * completeAsync with given executor completes exceptionally if
3716 +     * given supplier throws
3717 +     */
3718 +    public void testCompleteAsync4() {
3719 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3720 +        CFException ex = new CFException();
3721 +        ThreadExecutor executor = new ThreadExecutor();
3722 +        f.completeAsync(() -> { throw ex; }, executor);
3723 +        try {
3724 +            f.join();
3725 +            shouldThrow();
3726 +        } catch (CompletionException success) {}
3727 +        checkCompletedWithWrappedException(f, ex);
3728 +        assertEquals(1, executor.count.get());
3729 +    }
3730 +
3731 +    /**
3732 +     * orTimeout completes with TimeoutException if not complete
3733 +     */
3734 +    public void testOrTimeout_timesOut() {
3735 +        long timeoutMillis = timeoutMillis();
3736 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3737 +        long startTime = System.nanoTime();
3738 +        assertSame(f, f.orTimeout(timeoutMillis, MILLISECONDS));
3739 +        checkCompletedWithTimeoutException(f);
3740 +        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3741 +    }
3742 +
3743 +    /**
3744 +     * orTimeout completes normally if completed before timeout
3745 +     */
3746 +    public void testOrTimeout_completed() {
3747 +        for (Integer v1 : new Integer[] { 1, null })
3748 +    {
3749 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3750 +        CompletableFuture<Integer> g = new CompletableFuture<>();
3751 +        long startTime = System.nanoTime();
3752 +        f.complete(v1);
3753 +        assertSame(f, f.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3754 +        assertSame(g, g.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3755 +        g.complete(v1);
3756 +        checkCompletedNormally(f, v1);
3757          checkCompletedNormally(g, v1);
3758 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3759 +    }}
3760 +
3761 +    /**
3762 +     * completeOnTimeout completes with given value if not complete
3763 +     */
3764 +    public void testCompleteOnTimeout_timesOut() {
3765 +        testInParallel(() -> testCompleteOnTimeout_timesOut(42),
3766 +                       () -> testCompleteOnTimeout_timesOut(null));
3767 +    }
3768 +
3769 +    /**
3770 +     * completeOnTimeout completes with given value if not complete
3771 +     */
3772 +    public void testCompleteOnTimeout_timesOut(Integer v) {
3773 +        long timeoutMillis = timeoutMillis();
3774 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3775 +        long startTime = System.nanoTime();
3776 +        assertSame(f, f.completeOnTimeout(v, timeoutMillis, MILLISECONDS));
3777 +        assertSame(v, f.join());
3778 +        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3779 +        f.complete(99);         // should have no effect
3780 +        checkCompletedNormally(f, v);
3781 +    }
3782 +
3783 +    /**
3784 +     * completeOnTimeout has no effect if completed within timeout
3785 +     */
3786 +    public void testCompleteOnTimeout_completed() {
3787 +        for (Integer v1 : new Integer[] { 1, null })
3788 +    {
3789 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3790 +        CompletableFuture<Integer> g = new CompletableFuture<>();
3791 +        long startTime = System.nanoTime();
3792 +        f.complete(v1);
3793 +        assertSame(f, f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3794 +        assertSame(g, g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3795 +        g.complete(v1);
3796          checkCompletedNormally(f, v1);
3797 <        assertEquals(1, a.get());
3797 >        checkCompletedNormally(g, v1);
3798 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3799      }}
3800  
3801      /**
3802 <     * whenComplete action executes on exceptional completion, propagating
3469 <     * source result.
3802 >     * delayedExecutor returns an executor that delays submission
3803       */
3804 <    public void testWhenComplete_exceptionalCompletion() {
3804 >    public void testDelayedExecutor() {
3805 >        testInParallel(() -> testDelayedExecutor(null, null),
3806 >                       () -> testDelayedExecutor(null, 1),
3807 >                       () -> testDelayedExecutor(new ThreadExecutor(), 1),
3808 >                       () -> testDelayedExecutor(new ThreadExecutor(), 1));
3809 >    }
3810 >
3811 >    public void testDelayedExecutor(Executor executor, Integer v) throws Exception {
3812 >        long timeoutMillis = timeoutMillis();
3813 >        // Use an "unreasonably long" long timeout to catch lingering threads
3814 >        long longTimeoutMillis = 1000 * 60 * 60 * 24;
3815 >        final Executor delayer, longDelayer;
3816 >        if (executor == null) {
3817 >            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS);
3818 >            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS);
3819 >        } else {
3820 >            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS, executor);
3821 >            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS, executor);
3822 >        }
3823 >        long startTime = System.nanoTime();
3824 >        CompletableFuture<Integer> f =
3825 >            CompletableFuture.supplyAsync(() -> v, delayer);
3826 >        CompletableFuture<Integer> g =
3827 >            CompletableFuture.supplyAsync(() -> v, longDelayer);
3828 >
3829 >        assertNull(g.getNow(null));
3830 >
3831 >        assertSame(v, f.get(LONG_DELAY_MS, MILLISECONDS));
3832 >        long millisElapsed = millisElapsedSince(startTime);
3833 >        assertTrue(millisElapsed >= timeoutMillis);
3834 >        assertTrue(millisElapsed < LONG_DELAY_MS / 2);
3835 >
3836 >        checkCompletedNormally(f, v);
3837 >
3838 >        checkIncomplete(g);
3839 >        assertTrue(g.cancel(true));
3840 >    }
3841 >
3842 >    //--- tests of implementation details; not part of official tck ---
3843 >
3844 >    Object resultOf(CompletableFuture<?> f) {
3845 >        SecurityManager sm = System.getSecurityManager();
3846 >        if (sm != null) {
3847 >            try {
3848 >                System.setSecurityManager(null);
3849 >            } catch (SecurityException giveUp) {
3850 >                return "Reflection not available";
3851 >            }
3852 >        }
3853 >
3854 >        try {
3855 >            java.lang.reflect.Field resultField
3856 >                = CompletableFuture.class.getDeclaredField("result");
3857 >            resultField.setAccessible(true);
3858 >            return resultField.get(f);
3859 >        } catch (Throwable t) {
3860 >            throw new AssertionError(t);
3861 >        } finally {
3862 >            if (sm != null) System.setSecurityManager(sm);
3863 >        }
3864 >    }
3865 >
3866 >    public void testExceptionPropagationReusesResultObject() {
3867 >        if (!testImplementationDetails) return;
3868          for (ExecutionMode m : ExecutionMode.values())
3869 +    {
3870 +        final CFException ex = new CFException();
3871 +        final CompletableFuture<Integer> v42 = CompletableFuture.completedFuture(42);
3872 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3873 +
3874 +        final Runnable noopRunnable = new Noop(m);
3875 +        final Consumer<Integer> noopConsumer = new NoopConsumer(m);
3876 +        final Function<Integer, Integer> incFunction = new IncFunction(m);
3877 +
3878 +        List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> funs
3879 +            = new ArrayList<>();
3880 +
3881 +        funs.add(y -> m.thenRun(y, noopRunnable));
3882 +        funs.add(y -> m.thenAccept(y, noopConsumer));
3883 +        funs.add(y -> m.thenApply(y, incFunction));
3884 +
3885 +        funs.add(y -> m.runAfterEither(y, incomplete, noopRunnable));
3886 +        funs.add(y -> m.acceptEither(y, incomplete, noopConsumer));
3887 +        funs.add(y -> m.applyToEither(y, incomplete, incFunction));
3888 +
3889 +        funs.add(y -> m.runAfterBoth(y, v42, noopRunnable));
3890 +        funs.add(y -> m.runAfterBoth(v42, y, noopRunnable));
3891 +        funs.add(y -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3892 +        funs.add(y -> m.thenAcceptBoth(v42, y, new SubtractAction(m)));
3893 +        funs.add(y -> m.thenCombine(y, v42, new SubtractFunction(m)));
3894 +        funs.add(y -> m.thenCombine(v42, y, new SubtractFunction(m)));
3895 +
3896 +        funs.add(y -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
3897 +
3898 +        funs.add(y -> m.thenCompose(y, new CompletableFutureInc(m)));
3899 +
3900 +        funs.add(y -> CompletableFuture.allOf(y));
3901 +        funs.add(y -> CompletableFuture.allOf(y, v42));
3902 +        funs.add(y -> CompletableFuture.allOf(v42, y));
3903 +        funs.add(y -> CompletableFuture.anyOf(y));
3904 +        funs.add(y -> CompletableFuture.anyOf(y, incomplete));
3905 +        funs.add(y -> CompletableFuture.anyOf(incomplete, y));
3906 +
3907 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3908 +                 fun : funs) {
3909 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3910 +            f.completeExceptionally(ex);
3911 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3912 +            checkCompletedWithWrappedException(src, ex);
3913 +            CompletableFuture<?> dep = fun.apply(src);
3914 +            checkCompletedWithWrappedException(dep, ex);
3915 +            assertSame(resultOf(src), resultOf(dep));
3916 +        }
3917 +
3918 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3919 +                 fun : funs) {
3920 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3921 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3922 +            CompletableFuture<?> dep = fun.apply(src);
3923 +            f.completeExceptionally(ex);
3924 +            checkCompletedWithWrappedException(src, ex);
3925 +            checkCompletedWithWrappedException(dep, ex);
3926 +            assertSame(resultOf(src), resultOf(dep));
3927 +        }
3928 +
3929 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3930 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3931 +                 fun : funs) {
3932 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3933 +            f.cancel(mayInterruptIfRunning);
3934 +            checkCancelled(f);
3935 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3936 +            checkCompletedWithWrappedCancellationException(src);
3937 +            CompletableFuture<?> dep = fun.apply(src);
3938 +            checkCompletedWithWrappedCancellationException(dep);
3939 +            assertSame(resultOf(src), resultOf(dep));
3940 +        }
3941 +
3942 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3943 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3944 +                 fun : funs) {
3945 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3946 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3947 +            CompletableFuture<?> dep = fun.apply(src);
3948 +            f.cancel(mayInterruptIfRunning);
3949 +            checkCancelled(f);
3950 +            checkCompletedWithWrappedCancellationException(src);
3951 +            checkCompletedWithWrappedCancellationException(dep);
3952 +            assertSame(resultOf(src), resultOf(dep));
3953 +        }
3954 +    }}
3955 +
3956 +    /**
3957 +     * Minimal completion stages throw UOE for most non-CompletionStage methods
3958 +     */
3959 +    public void testMinimalCompletionStage_minimality() {
3960 +        if (!testImplementationDetails) return;
3961 +        Function<Method, String> toSignature =
3962 +            method -> method.getName() + Arrays.toString(method.getParameterTypes());
3963 +        Predicate<Method> isNotStatic =
3964 +            method -> (method.getModifiers() & Modifier.STATIC) == 0;
3965 +        List<Method> minimalMethods =
3966 +            Stream.of(Object.class, CompletionStage.class)
3967 +            .flatMap(klazz -> Stream.of(klazz.getMethods()))
3968 +            .filter(isNotStatic)
3969 +            .collect(Collectors.toList());
3970 +        // Methods from CompletableFuture permitted NOT to throw UOE
3971 +        String[] signatureWhitelist = {
3972 +            "newIncompleteFuture[]",
3973 +            "defaultExecutor[]",
3974 +            "minimalCompletionStage[]",
3975 +            "copy[]",
3976 +        };
3977 +        Set<String> permittedMethodSignatures =
3978 +            Stream.concat(minimalMethods.stream().map(toSignature),
3979 +                          Stream.of(signatureWhitelist))
3980 +            .collect(Collectors.toSet());
3981 +        List<Method> allMethods = Stream.of(CompletableFuture.class.getMethods())
3982 +            .filter(isNotStatic)
3983 +            .filter(method -> !permittedMethodSignatures.contains(toSignature.apply(method)))
3984 +            .collect(Collectors.toList());
3985 +
3986 +        List<CompletionStage<Integer>> stages = new ArrayList<>();
3987 +        CompletionStage<Integer> min =
3988 +            new CompletableFuture<Integer>().minimalCompletionStage();
3989 +        stages.add(min);
3990 +        stages.add(min.thenApply(x -> x));
3991 +        stages.add(CompletableFuture.completedStage(1));
3992 +        stages.add(CompletableFuture.failedStage(new CFException()));
3993 +
3994 +        List<Method> bugs = new ArrayList<>();
3995 +        for (Method method : allMethods) {
3996 +            Class<?>[] parameterTypes = method.getParameterTypes();
3997 +            Object[] args = new Object[parameterTypes.length];
3998 +            // Manufacture boxed primitives for primitive params
3999 +            for (int i = 0; i < args.length; i++) {
4000 +                Class<?> type = parameterTypes[i];
4001 +                if (parameterTypes[i] == boolean.class)
4002 +                    args[i] = false;
4003 +                else if (parameterTypes[i] == int.class)
4004 +                    args[i] = 0;
4005 +                else if (parameterTypes[i] == long.class)
4006 +                    args[i] = 0L;
4007 +            }
4008 +            for (CompletionStage<Integer> stage : stages) {
4009 +                try {
4010 +                    method.invoke(stage, args);
4011 +                    bugs.add(method);
4012 +                }
4013 +                catch (java.lang.reflect.InvocationTargetException expected) {
4014 +                    if (! (expected.getCause() instanceof UnsupportedOperationException)) {
4015 +                        bugs.add(method);
4016 +                        // expected.getCause().printStackTrace();
4017 +                    }
4018 +                }
4019 +                catch (ReflectiveOperationException bad) { throw new Error(bad); }
4020 +            }
4021 +        }
4022 +        if (!bugs.isEmpty())
4023 +            throw new Error("Methods did not throw UOE: " + bugs);
4024 +    }
4025 +
4026 +    /**
4027 +     * minimalStage.toCompletableFuture() returns a CompletableFuture that
4028 +     * is completed normally, with the same value, when source is.
4029 +     */
4030 +    public void testMinimalCompletionStage_toCompletableFuture_normalCompletion() {
4031          for (boolean createIncomplete : new boolean[] { true, false })
4032          for (Integer v1 : new Integer[] { 1, null })
4033      {
4034 <        final AtomicInteger a = new AtomicInteger(0);
4035 <        final CFException ex = new CFException();
4036 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
4037 <        if (!createIncomplete) f.completeExceptionally(ex);
4038 <        final CompletableFuture<Integer> g = m.whenComplete
4039 <            (f,
4040 <             (Integer x, Throwable t) -> {
4041 <                threadAssertNull(x);
4042 <                threadAssertSame(t, ex);
4043 <                a.getAndIncrement();
4044 <            });
3487 <        if (createIncomplete) f.completeExceptionally(ex);
3488 <        checkCompletedWithWrappedCFException(f, ex);
3489 <        checkCompletedWithWrappedCFException(g, ex);
3490 <        assertEquals(1, a.get());
4034 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4035 >        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4036 >        if (!createIncomplete) assertTrue(f.complete(v1));
4037 >        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4038 >        if (createIncomplete) {
4039 >            checkIncomplete(f);
4040 >            checkIncomplete(g);
4041 >            assertTrue(f.complete(v1));
4042 >        }
4043 >        checkCompletedNormally(f, v1);
4044 >        checkCompletedNormally(g, v1);
4045      }}
4046  
4047      /**
4048 <     * whenComplete action executes on cancelled source, propagating
4049 <     * CancellationException.
4048 >     * minimalStage.toCompletableFuture() returns a CompletableFuture that
4049 >     * is completed exceptionally when source is.
4050       */
4051 <    public void testWhenComplete_sourceCancelled() {
3498 <        for (ExecutionMode m : ExecutionMode.values())
3499 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
4051 >    public void testMinimalCompletionStage_toCompletableFuture_exceptionalCompletion() {
4052          for (boolean createIncomplete : new boolean[] { true, false })
4053      {
4054 <        final AtomicInteger a = new AtomicInteger(0);
4055 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
4056 <        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
4057 <        final CompletableFuture<Integer> g = m.whenComplete
4058 <            (f,
4059 <             (Integer x, Throwable t) -> {
4060 <                threadAssertNull(x);
4061 <                threadAssertTrue(t instanceof CancellationException);
4062 <                a.getAndIncrement();
4063 <            });
4064 <        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
4054 >        CFException ex = new CFException();
4055 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4056 >        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4057 >        if (!createIncomplete) f.completeExceptionally(ex);
4058 >        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4059 >        if (createIncomplete) {
4060 >            checkIncomplete(f);
4061 >            checkIncomplete(g);
4062 >            f.completeExceptionally(ex);
4063 >        }
4064 >        checkCompletedExceptionally(f, ex);
4065 >        checkCompletedWithWrappedException(g, ex);
4066 >    }}
4067  
4068 <        //try { g.join(); } catch (Throwable t) { throw new Error(t); }
4069 <        checkCompletedWithWrappedCancellationException(g);
4070 <        checkCancelled(f);
4071 <        assertEquals(1, a.get());
4068 >    /**
4069 >     * minimalStage.toCompletableFuture() gives mutable CompletableFuture
4070 >     */
4071 >    public void testMinimalCompletionStage_toCompletableFuture_mutable() {
4072 >        for (Integer v1 : new Integer[] { 1, null })
4073 >    {
4074 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4075 >        CompletionStage minimal = f.minimalCompletionStage();
4076 >        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4077 >        assertTrue(g.complete(v1));
4078 >        checkCompletedNormally(g, v1);
4079 >        checkIncomplete(f);
4080 >        checkIncomplete(minimal.toCompletableFuture());
4081      }}
4082  
4083      /**
4084 <     * If a whenComplete action throws an exception when triggered by
3522 <     * a normal completion, it completes exceptionally
4084 >     * minimalStage.toCompletableFuture().join() awaits completion
4085       */
4086 <    public void testWhenComplete_actionFailed() {
4086 >    public void testMinimalCompletionStage_toCompletableFuture_join() throws Exception {
4087          for (boolean createIncomplete : new boolean[] { true, false })
3526        for (ExecutionMode m : ExecutionMode.values())
4088          for (Integer v1 : new Integer[] { 1, null })
4089      {
4090 <        final AtomicInteger a = new AtomicInteger(0);
4091 <        final CFException ex = new CFException();
4092 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
4093 <        if (!createIncomplete) f.complete(v1);
4094 <        final CompletableFuture<Integer> g = m.whenComplete
4095 <            (f,
4096 <             (Integer x, Throwable t) -> {
3536 <                threadAssertSame(x, v1);
3537 <                threadAssertNull(t);
3538 <                a.getAndIncrement();
3539 <                throw ex;
3540 <            });
3541 <        if (createIncomplete) f.complete(v1);
3542 <        checkCompletedNormally(f, v1);
3543 <        checkCompletedWithWrappedCFException(g, ex);
3544 <        assertEquals(1, a.get());
4090 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4091 >        if (!createIncomplete) assertTrue(f.complete(v1));
4092 >        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4093 >        if (createIncomplete) assertTrue(f.complete(v1));
4094 >        assertEquals(v1, minimal.toCompletableFuture().join());
4095 >        assertEquals(v1, minimal.toCompletableFuture().get());
4096 >        checkCompletedNormally(minimal.toCompletableFuture(), v1);
4097      }}
4098  
4099      /**
4100 <     * If a whenComplete action throws an exception when triggered by
4101 <     * a source completion that also throws an exception, the source
4102 <     * exception takes precedence.
4100 >     * Completion of a toCompletableFuture copy of a minimal stage
4101 >     * does not complete its source.
4102 >     */
4103 >    public void testMinimalCompletionStage_toCompletableFuture_oneWayPropagation() {
4104 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4105 >        CompletionStage<Integer> g = f.minimalCompletionStage();
4106 >        assertTrue(g.toCompletableFuture().complete(1));
4107 >        assertTrue(g.toCompletableFuture().complete(null));
4108 >        assertTrue(g.toCompletableFuture().cancel(true));
4109 >        assertTrue(g.toCompletableFuture().cancel(false));
4110 >        assertTrue(g.toCompletableFuture().completeExceptionally(new CFException()));
4111 >        checkIncomplete(g.toCompletableFuture());
4112 >        f.complete(1);
4113 >        checkCompletedNormally(g.toCompletableFuture(), 1);
4114 >    }
4115 >
4116 >    /** Demo utility method for external reliable toCompletableFuture */
4117 >    static <T> CompletableFuture<T> toCompletableFuture(CompletionStage<T> stage) {
4118 >        CompletableFuture<T> f = new CompletableFuture<>();
4119 >        stage.handle((T t, Throwable ex) -> {
4120 >                         if (ex != null) f.completeExceptionally(ex);
4121 >                         else f.complete(t);
4122 >                         return null;
4123 >                     });
4124 >        return f;
4125 >    }
4126 >
4127 >    /** Demo utility method to join a CompletionStage */
4128 >    static <T> T join(CompletionStage<T> stage) {
4129 >        return toCompletableFuture(stage).join();
4130 >    }
4131 >
4132 >    /**
4133 >     * Joining a minimal stage "by hand" works
4134       */
4135 <    public void testWhenComplete_actionFailedSourceFailed() {
4135 >    public void testMinimalCompletionStage_join_by_hand() {
4136          for (boolean createIncomplete : new boolean[] { true, false })
3554        for (ExecutionMode m : ExecutionMode.values())
4137          for (Integer v1 : new Integer[] { 1, null })
4138      {
4139 <        final AtomicInteger a = new AtomicInteger(0);
4140 <        final CFException ex1 = new CFException();
4141 <        final CFException ex2 = new CFException();
4142 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
4139 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4140 >        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4141 >        CompletableFuture<Integer> g = new CompletableFuture<>();
4142 >        if (!createIncomplete) assertTrue(f.complete(v1));
4143 >        minimal.thenAccept(x -> g.complete(x));
4144 >        if (createIncomplete) assertTrue(f.complete(v1));
4145 >        g.join();
4146 >        checkCompletedNormally(g, v1);
4147 >        checkCompletedNormally(f, v1);
4148 >        assertEquals(v1, join(minimal));
4149 >    }}
4150  
4151 <        if (!createIncomplete) f.completeExceptionally(ex1);
4152 <        final CompletableFuture<Integer> g = m.whenComplete
4153 <            (f,
4154 <             (Integer x, Throwable t) -> {
4155 <                threadAssertSame(t, ex1);
4156 <                threadAssertNull(x);
4157 <                a.getAndIncrement();
4158 <                throw ex2;
4159 <            });
4160 <        if (createIncomplete) f.completeExceptionally(ex1);
4151 >    static class Monad {
4152 >        static class ZeroException extends RuntimeException {
4153 >            public ZeroException() { super("monadic zero"); }
4154 >        }
4155 >        // "return", "unit"
4156 >        static <T> CompletableFuture<T> unit(T value) {
4157 >            return completedFuture(value);
4158 >        }
4159 >        // monadic zero ?
4160 >        static <T> CompletableFuture<T> zero() {
4161 >            return failedFuture(new ZeroException());
4162 >        }
4163 >        // >=>
4164 >        static <T,U,V> Function<T, CompletableFuture<V>> compose
4165 >            (Function<T, CompletableFuture<U>> f,
4166 >             Function<U, CompletableFuture<V>> g) {
4167 >            return x -> f.apply(x).thenCompose(g);
4168 >        }
4169  
4170 <        checkCompletedWithWrappedCFException(f, ex1);
4171 <        checkCompletedWithWrappedCFException(g, ex1);
4172 <        assertEquals(1, a.get());
4170 >        static void assertZero(CompletableFuture<?> f) {
4171 >            try {
4172 >                f.getNow(null);
4173 >                throw new AssertionFailedError("should throw");
4174 >            } catch (CompletionException success) {
4175 >                assertTrue(success.getCause() instanceof ZeroException);
4176 >            }
4177 >        }
4178 >
4179 >        static <T> void assertFutureEquals(CompletableFuture<T> f,
4180 >                                           CompletableFuture<T> g) {
4181 >            T fval = null, gval = null;
4182 >            Throwable fex = null, gex = null;
4183 >
4184 >            try { fval = f.get(); }
4185 >            catch (ExecutionException ex) { fex = ex.getCause(); }
4186 >            catch (Throwable ex) { fex = ex; }
4187 >
4188 >            try { gval = g.get(); }
4189 >            catch (ExecutionException ex) { gex = ex.getCause(); }
4190 >            catch (Throwable ex) { gex = ex; }
4191 >
4192 >            if (fex != null || gex != null)
4193 >                assertSame(fex.getClass(), gex.getClass());
4194 >            else
4195 >                assertEquals(fval, gval);
4196 >        }
4197 >
4198 >        static class PlusFuture<T> extends CompletableFuture<T> {
4199 >            AtomicReference<Throwable> firstFailure = new AtomicReference<>(null);
4200 >        }
4201 >
4202 >        /** Implements "monadic plus". */
4203 >        static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f,
4204 >                                             CompletableFuture<? extends T> g) {
4205 >            PlusFuture<T> plus = new PlusFuture<T>();
4206 >            BiConsumer<T, Throwable> action = (T result, Throwable ex) -> {
4207 >                try {
4208 >                    if (ex == null) {
4209 >                        if (plus.complete(result))
4210 >                            if (plus.firstFailure.get() != null)
4211 >                                plus.firstFailure.set(null);
4212 >                    }
4213 >                    else if (plus.firstFailure.compareAndSet(null, ex)) {
4214 >                        if (plus.isDone())
4215 >                            plus.firstFailure.set(null);
4216 >                    }
4217 >                    else {
4218 >                        // first failure has precedence
4219 >                        Throwable first = plus.firstFailure.getAndSet(null);
4220 >
4221 >                        // may fail with "Self-suppression not permitted"
4222 >                        try { first.addSuppressed(ex); }
4223 >                        catch (Exception ignored) {}
4224 >
4225 >                        plus.completeExceptionally(first);
4226 >                    }
4227 >                } catch (Throwable unexpected) {
4228 >                    plus.completeExceptionally(unexpected);
4229 >                }
4230 >            };
4231 >            f.whenComplete(action);
4232 >            g.whenComplete(action);
4233 >            return plus;
4234 >        }
4235 >    }
4236 >
4237 >    /**
4238 >     * CompletableFuture is an additive monad - sort of.
4239 >     * https://en.wikipedia.org/wiki/Monad_(functional_programming)#Additive_monads
4240 >     */
4241 >    public void testAdditiveMonad() throws Throwable {
4242 >        Function<Long, CompletableFuture<Long>> unit = Monad::unit;
4243 >        CompletableFuture<Long> zero = Monad.zero();
4244 >
4245 >        // Some mutually non-commutative functions
4246 >        Function<Long, CompletableFuture<Long>> triple
4247 >            = x -> Monad.unit(3 * x);
4248 >        Function<Long, CompletableFuture<Long>> inc
4249 >            = x -> Monad.unit(x + 1);
4250 >
4251 >        // unit is a right identity: m >>= unit === m
4252 >        Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
4253 >                                 inc.apply(5L));
4254 >        // unit is a left identity: (unit x) >>= f === f x
4255 >        Monad.assertFutureEquals(unit.apply(5L).thenCompose(inc),
4256 >                                 inc.apply(5L));
4257 >
4258 >        // associativity: (m >>= f) >>= g === m >>= ( \x -> (f x >>= g) )
4259 >        Monad.assertFutureEquals(
4260 >            unit.apply(5L).thenCompose(inc).thenCompose(triple),
4261 >            unit.apply(5L).thenCompose(x -> inc.apply(x).thenCompose(triple)));
4262 >
4263 >        // The case for CompletableFuture as an additive monad is weaker...
4264 >
4265 >        // zero is a monadic zero
4266 >        Monad.assertZero(zero);
4267 >
4268 >        // left zero: zero >>= f === zero
4269 >        Monad.assertZero(zero.thenCompose(inc));
4270 >        // right zero: f >>= (\x -> zero) === zero
4271 >        Monad.assertZero(inc.apply(5L).thenCompose(x -> zero));
4272 >
4273 >        // f plus zero === f
4274 >        Monad.assertFutureEquals(Monad.unit(5L),
4275 >                                 Monad.plus(Monad.unit(5L), zero));
4276 >        // zero plus f === f
4277 >        Monad.assertFutureEquals(Monad.unit(5L),
4278 >                                 Monad.plus(zero, Monad.unit(5L)));
4279 >        // zero plus zero === zero
4280 >        Monad.assertZero(Monad.plus(zero, zero));
4281 >        {
4282 >            CompletableFuture<Long> f = Monad.plus(Monad.unit(5L),
4283 >                                                   Monad.unit(8L));
4284 >            // non-determinism
4285 >            assertTrue(f.get() == 5L || f.get() == 8L);
4286 >        }
4287 >
4288 >        CompletableFuture<Long> godot = new CompletableFuture<>();
4289 >        // f plus godot === f (doesn't wait for godot)
4290 >        Monad.assertFutureEquals(Monad.unit(5L),
4291 >                                 Monad.plus(Monad.unit(5L), godot));
4292 >        // godot plus f === f (doesn't wait for godot)
4293 >        Monad.assertFutureEquals(Monad.unit(5L),
4294 >                                 Monad.plus(godot, Monad.unit(5L)));
4295 >    }
4296 >
4297 >    /** Test long recursive chains of CompletableFutures with cascading completions */
4298 >    public void testRecursiveChains() throws Throwable {
4299 >        for (ExecutionMode m : ExecutionMode.values())
4300 >        for (boolean addDeadEnds : new boolean[] { true, false })
4301 >    {
4302 >        final int val = 42;
4303 >        final int n = expensiveTests ? 1_000 : 2;
4304 >        CompletableFuture<Integer> head = new CompletableFuture<>();
4305 >        CompletableFuture<Integer> tail = head;
4306 >        for (int i = 0; i < n; i++) {
4307 >            if (addDeadEnds) m.thenApply(tail, v -> v + 1);
4308 >            tail = m.thenApply(tail, v -> v + 1);
4309 >            if (addDeadEnds) m.applyToEither(tail, tail, v -> v + 1);
4310 >            tail = m.applyToEither(tail, tail, v -> v + 1);
4311 >            if (addDeadEnds) m.thenCombine(tail, tail, (v, w) -> v + 1);
4312 >            tail = m.thenCombine(tail, tail, (v, w) -> v + 1);
4313 >        }
4314 >        head.complete(val);
4315 >        assertEquals(val + 3 * n, (int) tail.join());
4316      }}
4317  
4318 +    /**
4319 +     * A single CompletableFuture with many dependents.
4320 +     * A demo of scalability - runtime is O(n).
4321 +     */
4322 +    public void testManyDependents() throws Throwable {
4323 +        final int n = expensiveTests ? 1_000_000 : 10;
4324 +        final CompletableFuture<Void> head = new CompletableFuture<>();
4325 +        final CompletableFuture<Void> complete = CompletableFuture.completedFuture((Void)null);
4326 +        final AtomicInteger count = new AtomicInteger(0);
4327 +        for (int i = 0; i < n; i++) {
4328 +            head.thenRun(() -> count.getAndIncrement());
4329 +            head.thenAccept(x -> count.getAndIncrement());
4330 +            head.thenApply(x -> count.getAndIncrement());
4331 +
4332 +            head.runAfterBoth(complete, () -> count.getAndIncrement());
4333 +            head.thenAcceptBoth(complete, (x, y) -> count.getAndIncrement());
4334 +            head.thenCombine(complete, (x, y) -> count.getAndIncrement());
4335 +            complete.runAfterBoth(head, () -> count.getAndIncrement());
4336 +            complete.thenAcceptBoth(head, (x, y) -> count.getAndIncrement());
4337 +            complete.thenCombine(head, (x, y) -> count.getAndIncrement());
4338 +
4339 +            head.runAfterEither(new CompletableFuture<Void>(), () -> count.getAndIncrement());
4340 +            head.acceptEither(new CompletableFuture<Void>(), x -> count.getAndIncrement());
4341 +            head.applyToEither(new CompletableFuture<Void>(), x -> count.getAndIncrement());
4342 +            new CompletableFuture<Void>().runAfterEither(head, () -> count.getAndIncrement());
4343 +            new CompletableFuture<Void>().acceptEither(head, x -> count.getAndIncrement());
4344 +            new CompletableFuture<Void>().applyToEither(head, x -> count.getAndIncrement());
4345 +        }
4346 +        head.complete(null);
4347 +        assertEquals(5 * 3 * n, count.get());
4348 +    }
4349 +
4350 +    /** ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest tck */
4351 +    public void testCoCompletionGarbageRetention() throws Throwable {
4352 +        final int n = expensiveTests ? 1_000_000 : 10;
4353 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
4354 +        CompletableFuture<Integer> f;
4355 +        for (int i = 0; i < n; i++) {
4356 +            f = new CompletableFuture<>();
4357 +            f.runAfterEither(incomplete, () -> {});
4358 +            f.complete(null);
4359 +
4360 +            f = new CompletableFuture<>();
4361 +            f.acceptEither(incomplete, x -> {});
4362 +            f.complete(null);
4363 +
4364 +            f = new CompletableFuture<>();
4365 +            f.applyToEither(incomplete, x -> x);
4366 +            f.complete(null);
4367 +
4368 +            f = new CompletableFuture<>();
4369 +            CompletableFuture.anyOf(new CompletableFuture<?>[] { f, incomplete });
4370 +            f.complete(null);
4371 +        }
4372 +
4373 +        for (int i = 0; i < n; i++) {
4374 +            f = new CompletableFuture<>();
4375 +            incomplete.runAfterEither(f, () -> {});
4376 +            f.complete(null);
4377 +
4378 +            f = new CompletableFuture<>();
4379 +            incomplete.acceptEither(f, x -> {});
4380 +            f.complete(null);
4381 +
4382 +            f = new CompletableFuture<>();
4383 +            incomplete.applyToEither(f, x -> x);
4384 +            f.complete(null);
4385 +
4386 +            f = new CompletableFuture<>();
4387 +            CompletableFuture.anyOf(new CompletableFuture<?>[] { incomplete, f });
4388 +            f.complete(null);
4389 +        }
4390 +    }
4391 +
4392 +    /**
4393 +     * Reproduction recipe for:
4394 +     * 8160402: Garbage retention with CompletableFuture.anyOf
4395 +     * cvs update -D '2016-05-01' ./src/main/java/util/concurrent/CompletableFuture.java && ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testAnyOfGarbageRetention tck; cvs update -A
4396 +     */
4397 +    public void testAnyOfGarbageRetention() throws Throwable {
4398 +        for (Integer v : new Integer[] { 1, null })
4399 +    {
4400 +        final int n = expensiveTests ? 100_000 : 10;
4401 +        CompletableFuture<Integer>[] fs
4402 +            = (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4403 +        for (int i = 0; i < fs.length; i++)
4404 +            fs[i] = new CompletableFuture<>();
4405 +        fs[fs.length - 1].complete(v);
4406 +        for (int i = 0; i < n; i++)
4407 +            checkCompletedNormally(CompletableFuture.anyOf(fs), v);
4408 +    }}
4409 +
4410 +    /**
4411 +     * Checks for garbage retention with allOf.
4412 +     *
4413 +     * As of 2016-07, fails with OOME:
4414 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledAllOfGarbageRetention tck
4415 +     */
4416 +    public void testCancelledAllOfGarbageRetention() throws Throwable {
4417 +        final int n = expensiveTests ? 100_000 : 10;
4418 +        CompletableFuture<Integer>[] fs
4419 +            = (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4420 +        for (int i = 0; i < fs.length; i++)
4421 +            fs[i] = new CompletableFuture<>();
4422 +        for (int i = 0; i < n; i++)
4423 +            assertTrue(CompletableFuture.allOf(fs).cancel(false));
4424 +    }
4425 +
4426 +    /**
4427 +     * Checks for garbage retention when a dependent future is
4428 +     * cancelled and garbage-collected.
4429 +     * 8161600: Garbage retention when source CompletableFutures are never completed
4430 +     *
4431 +     * As of 2016-07, fails with OOME:
4432 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledGarbageRetention tck
4433 +     */
4434 +    public void testCancelledGarbageRetention() throws Throwable {
4435 +        final int n = expensiveTests ? 100_000 : 10;
4436 +        CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4437 +        for (int i = 0; i < n; i++)
4438 +            assertTrue(neverCompleted.thenRun(() -> {}).cancel(true));
4439 +    }
4440 +
4441 +    /**
4442 +     * Checks for garbage retention when MinimalStage.toCompletableFuture()
4443 +     * is invoked many times.
4444 +     * 8161600: Garbage retention when source CompletableFutures are never completed
4445 +     *
4446 +     * As of 2016-07, fails with OOME:
4447 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testToCompletableFutureGarbageRetention tck
4448 +     */
4449 +    public void testToCompletableFutureGarbageRetention() throws Throwable {
4450 +        final int n = expensiveTests ? 900_000 : 10;
4451 +        CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4452 +        CompletionStage minimal = neverCompleted.minimalCompletionStage();
4453 +        for (int i = 0; i < n; i++)
4454 +            assertTrue(minimal.toCompletableFuture().cancel(true));
4455 +    }
4456 +
4457 + //     static <U> U join(CompletionStage<U> stage) {
4458 + //         CompletableFuture<U> f = new CompletableFuture<>();
4459 + //         stage.whenComplete((v, ex) -> {
4460 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4461 + //         });
4462 + //         return f.join();
4463 + //     }
4464 +
4465 + //     static <U> boolean isDone(CompletionStage<U> stage) {
4466 + //         CompletableFuture<U> f = new CompletableFuture<>();
4467 + //         stage.whenComplete((v, ex) -> {
4468 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4469 + //         });
4470 + //         return f.isDone();
4471 + //     }
4472 +
4473 + //     static <U> U join2(CompletionStage<U> stage) {
4474 + //         return stage.toCompletableFuture().copy().join();
4475 + //     }
4476 +
4477 + //     static <U> boolean isDone2(CompletionStage<U> stage) {
4478 + //         return stage.toCompletableFuture().copy().isDone();
4479 + //     }
4480 +
4481   }

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