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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 1.181 by jsr166, Sat Nov 26 20:32:24 2016 UTC

# Line 5 | Line 5
5   * http://creativecommons.org/publicdomain/zero/1.0/
6   */
7  
8 < import junit.framework.*;
8 > import static java.util.concurrent.TimeUnit.MILLISECONDS;
9 > import static java.util.concurrent.TimeUnit.SECONDS;
10 > import static java.util.concurrent.CompletableFuture.completedFuture;
11 > import static java.util.concurrent.CompletableFuture.failedFuture;
12 >
13 > import java.lang.reflect.Method;
14 > import java.lang.reflect.Modifier;
15 >
16 > import java.util.stream.Collectors;
17 > import java.util.stream.Stream;
18 >
19 > import java.util.ArrayList;
20 > import java.util.Arrays;
21 > import java.util.List;
22 > import java.util.Objects;
23 > import java.util.Set;
24   import java.util.concurrent.Callable;
10 import java.util.concurrent.Executor;
11 import java.util.concurrent.ExecutorService;
12 import java.util.concurrent.Executors;
25   import java.util.concurrent.CancellationException;
14 import java.util.concurrent.CountDownLatch;
15 import java.util.concurrent.ExecutionException;
16 import java.util.concurrent.Future;
26   import java.util.concurrent.CompletableFuture;
27   import java.util.concurrent.CompletionException;
28   import java.util.concurrent.CompletionStage;
29 + import java.util.concurrent.ExecutionException;
30 + import java.util.concurrent.Executor;
31 + import java.util.concurrent.ForkJoinPool;
32 + import java.util.concurrent.ForkJoinTask;
33 + import java.util.concurrent.RejectedExecutionException;
34   import java.util.concurrent.TimeoutException;
35   import java.util.concurrent.atomic.AtomicInteger;
36 < import static java.util.concurrent.TimeUnit.MILLISECONDS;
23 < import static java.util.concurrent.TimeUnit.SECONDS;
24 < import java.util.*;
25 < import java.util.function.Supplier;
26 < import java.util.function.Consumer;
36 > import java.util.concurrent.atomic.AtomicReference;
37   import java.util.function.BiConsumer;
28 import java.util.function.Function;
38   import java.util.function.BiFunction;
39 + import java.util.function.Consumer;
40 + import java.util.function.Function;
41 + import java.util.function.Predicate;
42 + import java.util.function.Supplier;
43 +
44 + import junit.framework.AssertionFailedError;
45 + import junit.framework.Test;
46 + import junit.framework.TestSuite;
47  
48   public class CompletableFutureTest extends JSR166TestCase {
49  
50      public static void main(String[] args) {
51 <        junit.textui.TestRunner.run(suite());
51 >        main(suite(), args);
52      }
53      public static Test suite() {
54          return new TestSuite(CompletableFutureTest.class);
# Line 42 | Line 59 | public class CompletableFutureTest exten
59      void checkIncomplete(CompletableFuture<?> f) {
60          assertFalse(f.isDone());
61          assertFalse(f.isCancelled());
62 <        assertTrue(f.toString().contains("[Not completed]"));
62 >        assertTrue(f.toString().contains("Not completed"));
63          try {
64              assertNull(f.getNow(null));
65          } catch (Throwable fail) { threadUnexpectedException(fail); }
# Line 55 | Line 72 | public class CompletableFutureTest exten
72      }
73  
74      <T> void checkCompletedNormally(CompletableFuture<T> f, T value) {
75 <        try {
76 <            assertEquals(value, f.get(LONG_DELAY_MS, MILLISECONDS));
60 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
75 >        checkTimedGet(f, value);
76 >
77          try {
78              assertEquals(value, f.join());
79          } catch (Throwable fail) { threadUnexpectedException(fail); }
# Line 73 | Line 89 | public class CompletableFutureTest exten
89          assertTrue(f.toString().contains("[Completed normally]"));
90      }
91  
92 <    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
93 <        try {
94 <            f.get(LONG_DELAY_MS, MILLISECONDS);
95 <            shouldThrow();
96 <        } catch (ExecutionException success) {
97 <            assertTrue(success.getCause() instanceof CFException);
98 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
99 <        try {
100 <            f.join();
101 <            shouldThrow();
102 <        } catch (CompletionException success) {
103 <            assertTrue(success.getCause() instanceof CFException);
104 <        }
105 <        try {
106 <            f.getNow(null);
107 <            shouldThrow();
108 <        } catch (CompletionException success) {
93 <            assertTrue(success.getCause() instanceof CFException);
92 >    /**
93 >     * Returns the "raw" internal exceptional completion of f,
94 >     * without any additional wrapping with CompletionException.
95 >     */
96 >    <U> Throwable exceptionalCompletion(CompletableFuture<U> f) {
97 >        // handle (and whenComplete) can distinguish between "direct"
98 >        // and "wrapped" exceptional completion
99 >        return f.handle((U u, Throwable t) -> t).join();
100 >    }
101 >
102 >    void checkCompletedExceptionally(CompletableFuture<?> f,
103 >                                     boolean wrapped,
104 >                                     Consumer<Throwable> checker) {
105 >        Throwable cause = exceptionalCompletion(f);
106 >        if (wrapped) {
107 >            assertTrue(cause instanceof CompletionException);
108 >            cause = cause.getCause();
109          }
110 <        try {
96 <            f.get();
97 <            shouldThrow();
98 <        } catch (ExecutionException success) {
99 <            assertTrue(success.getCause() instanceof CFException);
100 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
101 <        assertTrue(f.isDone());
102 <        assertFalse(f.isCancelled());
103 <        assertTrue(f.toString().contains("[Completed exceptionally]"));
104 <    }
110 >        checker.accept(cause);
111  
112 <    void checkCompletedWithWrappedCFException(CompletableFuture<?> f,
107 <                                              CFException ex) {
112 >        long startTime = System.nanoTime();
113          try {
114              f.get(LONG_DELAY_MS, MILLISECONDS);
115              shouldThrow();
116          } catch (ExecutionException success) {
117 <            assertSame(ex, success.getCause());
117 >            assertSame(cause, success.getCause());
118          } catch (Throwable fail) { threadUnexpectedException(fail); }
119 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
120 +
121          try {
122              f.join();
123              shouldThrow();
124          } catch (CompletionException success) {
125 <            assertSame(ex, success.getCause());
126 <        }
125 >            assertSame(cause, success.getCause());
126 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
127 >
128          try {
129              f.getNow(null);
130              shouldThrow();
131          } catch (CompletionException success) {
132 <            assertSame(ex, success.getCause());
133 <        }
132 >            assertSame(cause, success.getCause());
133 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
134 >
135          try {
136              f.get();
137              shouldThrow();
138          } catch (ExecutionException success) {
139 <            assertSame(ex, success.getCause());
139 >            assertSame(cause, success.getCause());
140          } catch (Throwable fail) { threadUnexpectedException(fail); }
141 <        assertTrue(f.isDone());
141 >
142          assertFalse(f.isCancelled());
143 +        assertTrue(f.isDone());
144 +        assertTrue(f.isCompletedExceptionally());
145          assertTrue(f.toString().contains("[Completed exceptionally]"));
146      }
147  
148 +    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
149 +        checkCompletedExceptionally(f, true,
150 +            t -> assertTrue(t instanceof CFException));
151 +    }
152 +
153 +    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
154 +        checkCompletedExceptionally(f, true,
155 +            t -> assertTrue(t instanceof CancellationException));
156 +    }
157 +
158 +    void checkCompletedWithTimeoutException(CompletableFuture<?> f) {
159 +        checkCompletedExceptionally(f, false,
160 +            t -> assertTrue(t instanceof TimeoutException));
161 +    }
162 +
163 +    void checkCompletedWithWrappedException(CompletableFuture<?> f,
164 +                                            Throwable ex) {
165 +        checkCompletedExceptionally(f, true, t -> assertSame(t, ex));
166 +    }
167 +
168 +    void checkCompletedExceptionally(CompletableFuture<?> f, Throwable ex) {
169 +        checkCompletedExceptionally(f, false, t -> assertSame(t, ex));
170 +    }
171 +
172      void checkCancelled(CompletableFuture<?> f) {
173 +        long startTime = System.nanoTime();
174          try {
175              f.get(LONG_DELAY_MS, MILLISECONDS);
176              shouldThrow();
177          } catch (CancellationException success) {
178          } catch (Throwable fail) { threadUnexpectedException(fail); }
179 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
180 +
181          try {
182              f.join();
183              shouldThrow();
# Line 153 | Line 191 | public class CompletableFutureTest exten
191              shouldThrow();
192          } catch (CancellationException success) {
193          } catch (Throwable fail) { threadUnexpectedException(fail); }
156        assertTrue(f.isDone());
157        assertTrue(f.isCompletedExceptionally());
158        assertTrue(f.isCancelled());
159        assertTrue(f.toString().contains("[Completed exceptionally]"));
160    }
194  
195 <    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
196 <        try {
164 <            f.get(LONG_DELAY_MS, MILLISECONDS);
165 <            shouldThrow();
166 <        } catch (ExecutionException success) {
167 <            assertTrue(success.getCause() instanceof CancellationException);
168 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
169 <        try {
170 <            f.join();
171 <            shouldThrow();
172 <        } catch (CompletionException success) {
173 <            assertTrue(success.getCause() instanceof CancellationException);
174 <        }
175 <        try {
176 <            f.getNow(null);
177 <            shouldThrow();
178 <        } catch (CompletionException success) {
179 <            assertTrue(success.getCause() instanceof CancellationException);
180 <        }
181 <        try {
182 <            f.get();
183 <            shouldThrow();
184 <        } catch (ExecutionException success) {
185 <            assertTrue(success.getCause() instanceof CancellationException);
186 <        } catch (Throwable fail) { threadUnexpectedException(fail); }
195 >        assertTrue(exceptionalCompletion(f) instanceof CancellationException);
196 >
197          assertTrue(f.isDone());
188        assertFalse(f.isCancelled());
198          assertTrue(f.isCompletedExceptionally());
199 +        assertTrue(f.isCancelled());
200          assertTrue(f.toString().contains("[Completed exceptionally]"));
201      }
202  
# Line 204 | Line 214 | public class CompletableFutureTest exten
214       * isCancelled, join, get, and getNow
215       */
216      public void testComplete() {
217 +        for (Integer v1 : new Integer[] { 1, null })
218 +    {
219          CompletableFuture<Integer> f = new CompletableFuture<>();
220          checkIncomplete(f);
221 <        f.complete(one);
222 <        checkCompletedNormally(f, one);
223 <    }
221 >        assertTrue(f.complete(v1));
222 >        assertFalse(f.complete(v1));
223 >        checkCompletedNormally(f, v1);
224 >    }}
225  
226      /**
227       * completeExceptionally completes exceptionally, as indicated by
# Line 216 | Line 229 | public class CompletableFutureTest exten
229       */
230      public void testCompleteExceptionally() {
231          CompletableFuture<Integer> f = new CompletableFuture<>();
232 +        CFException ex = new CFException();
233          checkIncomplete(f);
234 <        f.completeExceptionally(new CFException());
235 <        checkCompletedWithWrappedCFException(f);
234 >        f.completeExceptionally(ex);
235 >        checkCompletedExceptionally(f, ex);
236      }
237  
238      /**
# Line 226 | Line 240 | public class CompletableFutureTest exten
240       * methods isDone, isCancelled, join, get, and getNow
241       */
242      public void testCancel() {
243 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
244 +    {
245          CompletableFuture<Integer> f = new CompletableFuture<>();
246          checkIncomplete(f);
247 <        assertTrue(f.cancel(true));
247 >        assertTrue(f.cancel(mayInterruptIfRunning));
248 >        assertTrue(f.cancel(mayInterruptIfRunning));
249 >        assertTrue(f.cancel(!mayInterruptIfRunning));
250          checkCancelled(f);
251 <    }
251 >    }}
252  
253      /**
254       * obtrudeValue forces completion with given value
# Line 238 | Line 256 | public class CompletableFutureTest exten
256      public void testObtrudeValue() {
257          CompletableFuture<Integer> f = new CompletableFuture<>();
258          checkIncomplete(f);
259 <        f.complete(one);
259 >        assertTrue(f.complete(one));
260          checkCompletedNormally(f, one);
261          f.obtrudeValue(three);
262          checkCompletedNormally(f, three);
# Line 259 | Line 277 | public class CompletableFutureTest exten
277       * obtrudeException forces completion with given exception
278       */
279      public void testObtrudeException() {
280 <        CompletableFuture<Integer> f = new CompletableFuture<>();
281 <        checkIncomplete(f);
282 <        f.complete(one);
283 <        checkCompletedNormally(f, one);
284 <        f.obtrudeException(new CFException());
285 <        checkCompletedWithWrappedCFException(f);
280 >        for (Integer v1 : new Integer[] { 1, null })
281 >    {
282 >        CFException ex;
283 >        CompletableFuture<Integer> f;
284 >
285 >        f = new CompletableFuture<>();
286 >        assertTrue(f.complete(v1));
287 >        for (int i = 0; i < 2; i++) {
288 >            f.obtrudeException(ex = new CFException());
289 >            checkCompletedExceptionally(f, ex);
290 >        }
291 >
292          f = new CompletableFuture<>();
293 <        f.obtrudeException(new CFException());
294 <        checkCompletedWithWrappedCFException(f);
293 >        for (int i = 0; i < 2; i++) {
294 >            f.obtrudeException(ex = new CFException());
295 >            checkCompletedExceptionally(f, ex);
296 >        }
297 >
298          f = new CompletableFuture<>();
299 +        f.completeExceptionally(ex = new CFException());
300 +        f.obtrudeValue(v1);
301 +        checkCompletedNormally(f, v1);
302 +        f.obtrudeException(ex = new CFException());
303 +        checkCompletedExceptionally(f, ex);
304          f.completeExceptionally(new CFException());
305 <        f.obtrudeValue(four);
306 <        checkCompletedNormally(f, four);
307 <        f.obtrudeException(new CFException());
308 <        checkCompletedWithWrappedCFException(f);
277 <    }
305 >        checkCompletedExceptionally(f, ex);
306 >        assertFalse(f.complete(v1));
307 >        checkCompletedExceptionally(f, ex);
308 >    }}
309  
310      /**
311       * getNumberOfDependents returns number of dependent tasks
312       */
313      public void testGetNumberOfDependents() {
314 +        for (ExecutionMode m : ExecutionMode.values())
315 +        for (Integer v1 : new Integer[] { 1, null })
316 +    {
317          CompletableFuture<Integer> f = new CompletableFuture<>();
318          assertEquals(0, f.getNumberOfDependents());
319 <        CompletableFuture g = f.thenRun(new Noop());
319 >        final CompletableFuture<Void> g = m.thenRun(f, new Noop(m));
320          assertEquals(1, f.getNumberOfDependents());
321          assertEquals(0, g.getNumberOfDependents());
322 <        CompletableFuture h = f.thenRun(new Noop());
322 >        final CompletableFuture<Void> h = m.thenRun(f, new Noop(m));
323          assertEquals(2, f.getNumberOfDependents());
324 <        f.complete(1);
324 >        assertEquals(0, h.getNumberOfDependents());
325 >        assertTrue(f.complete(v1));
326          checkCompletedNormally(g, null);
327 +        checkCompletedNormally(h, null);
328          assertEquals(0, f.getNumberOfDependents());
329          assertEquals(0, g.getNumberOfDependents());
330 <    }
330 >        assertEquals(0, h.getNumberOfDependents());
331 >    }}
332  
333      /**
334       * toString indicates current completion state
# Line 302 | Line 339 | public class CompletableFutureTest exten
339          f = new CompletableFuture<String>();
340          assertTrue(f.toString().contains("[Not completed]"));
341  
342 <        f.complete("foo");
342 >        assertTrue(f.complete("foo"));
343          assertTrue(f.toString().contains("[Completed normally]"));
344  
345          f = new CompletableFuture<String>();
346 <        f.completeExceptionally(new IndexOutOfBoundsException());
346 >        assertTrue(f.completeExceptionally(new IndexOutOfBoundsException()));
347          assertTrue(f.toString().contains("[Completed exceptionally]"));
348 +
349 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
350 +            f = new CompletableFuture<String>();
351 +            assertTrue(f.cancel(mayInterruptIfRunning));
352 +            assertTrue(f.toString().contains("[Completed exceptionally]"));
353 +        }
354      }
355  
356      /**
# Line 318 | Line 361 | public class CompletableFutureTest exten
361          checkCompletedNormally(f, "test");
362      }
363  
364 <    // Choose non-commutative actions for better coverage
364 >    abstract static class CheckedAction {
365 >        int invocationCount = 0;
366 >        final ExecutionMode m;
367 >        CheckedAction(ExecutionMode m) { this.m = m; }
368 >        void invoked() {
369 >            m.checkExecutionMode();
370 >            assertEquals(0, invocationCount++);
371 >        }
372 >        void assertNotInvoked() { assertEquals(0, invocationCount); }
373 >        void assertInvoked() { assertEquals(1, invocationCount); }
374 >    }
375  
376 <    // A non-commutative function that handles and produces null values as well.
377 <    static Integer subtract(Integer x, Integer y) {
378 <        return (x == null && y == null) ? null :
379 <            ((x == null) ? 42 : x.intValue())
380 <            - ((y == null) ? 99 : y.intValue());
376 >    abstract static class CheckedIntegerAction extends CheckedAction {
377 >        Integer value;
378 >        CheckedIntegerAction(ExecutionMode m) { super(m); }
379 >        void assertValue(Integer expected) {
380 >            assertInvoked();
381 >            assertEquals(expected, value);
382 >        }
383 >    }
384 >
385 >    static class IntegerSupplier extends CheckedAction
386 >        implements Supplier<Integer>
387 >    {
388 >        final Integer value;
389 >        IntegerSupplier(ExecutionMode m, Integer value) {
390 >            super(m);
391 >            this.value = value;
392 >        }
393 >        public Integer get() {
394 >            invoked();
395 >            return value;
396 >        }
397      }
398  
399      // A function that handles and produces null values as well.
# Line 332 | Line 401 | public class CompletableFutureTest exten
401          return (x == null) ? null : x + 1;
402      }
403  
404 <    static final Supplier<Integer> supplyOne =
405 <        () -> Integer.valueOf(1);
406 <    static final Function<Integer, Integer> inc =
407 <        (Integer x) -> Integer.valueOf(x.intValue() + 1);
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;
404 >    static class NoopConsumer extends CheckedIntegerAction
405 >        implements Consumer<Integer>
406 >    {
407 >        NoopConsumer(ExecutionMode m) { super(m); }
408          public void accept(Integer x) {
409 <            invocationCount++;
410 <            value = inc(x);
409 >            invoked();
410 >            value = x;
411          }
412      }
413 <    static final class IncFunction implements Function<Integer,Integer> {
414 <        int invocationCount = 0;
415 <        Integer value;
413 >
414 >    static class IncFunction extends CheckedIntegerAction
415 >        implements Function<Integer,Integer>
416 >    {
417 >        IncFunction(ExecutionMode m) { super(m); }
418          public Integer apply(Integer x) {
419 <            invocationCount++;
419 >            invoked();
420              return value = inc(x);
421          }
422      }
423 <    static final class SubtractAction implements BiConsumer<Integer, Integer> {
424 <        int invocationCount = 0;
425 <        Integer value;
426 <        // Check this action was invoked exactly once when result is computed.
423 >
424 >    // Choose non-commutative actions for better coverage
425 >    // A non-commutative function that handles and produces null values as well.
426 >    static Integer subtract(Integer x, Integer y) {
427 >        return (x == null && y == null) ? null :
428 >            ((x == null) ? 42 : x.intValue())
429 >            - ((y == null) ? 99 : y.intValue());
430 >    }
431 >
432 >    static class SubtractAction extends CheckedIntegerAction
433 >        implements BiConsumer<Integer, Integer>
434 >    {
435 >        SubtractAction(ExecutionMode m) { super(m); }
436          public void accept(Integer x, Integer y) {
437 <            invocationCount++;
437 >            invoked();
438              value = subtract(x, y);
439          }
440      }
441 <    static final class SubtractFunction implements BiFunction<Integer, Integer, Integer> {
442 <        int invocationCount = 0;
443 <        Integer value;
444 <        // Check this action was invoked exactly once when result is computed.
441 >
442 >    static class SubtractFunction extends CheckedIntegerAction
443 >        implements BiFunction<Integer, Integer, Integer>
444 >    {
445 >        SubtractFunction(ExecutionMode m) { super(m); }
446          public Integer apply(Integer x, Integer y) {
447 <            invocationCount++;
447 >            invoked();
448              return value = subtract(x, y);
449          }
450      }
451 <    static final class Noop implements Runnable {
452 <        int invocationCount = 0;
451 >
452 >    static class Noop extends CheckedAction implements Runnable {
453 >        Noop(ExecutionMode m) { super(m); }
454          public void run() {
455 <            invocationCount++;
455 >            invoked();
456          }
457      }
458  
459 <    static final class FailingSupplier implements Supplier<Integer> {
460 <        int invocationCount = 0;
459 >    static class FailingSupplier extends CheckedAction
460 >        implements Supplier<Integer>
461 >    {
462 >        final CFException ex;
463 >        FailingSupplier(ExecutionMode m) { super(m); ex = new CFException(); }
464          public Integer get() {
465 <            invocationCount++;
466 <            throw new CFException();
465 >            invoked();
466 >            throw ex;
467          }
468      }
469 <    static final class FailingConsumer implements Consumer<Integer> {
470 <        int invocationCount = 0;
469 >
470 >    static class FailingConsumer extends CheckedIntegerAction
471 >        implements Consumer<Integer>
472 >    {
473 >        final CFException ex;
474 >        FailingConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
475          public void accept(Integer x) {
476 <            invocationCount++;
477 <            throw new CFException();
476 >            invoked();
477 >            value = x;
478 >            throw ex;
479          }
480      }
481 <    static final class FailingBiConsumer implements BiConsumer<Integer, Integer> {
482 <        int invocationCount = 0;
481 >
482 >    static class FailingBiConsumer extends CheckedIntegerAction
483 >        implements BiConsumer<Integer, Integer>
484 >    {
485 >        final CFException ex;
486 >        FailingBiConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
487          public void accept(Integer x, Integer y) {
488 <            invocationCount++;
489 <            throw new CFException();
488 >            invoked();
489 >            value = subtract(x, y);
490 >            throw ex;
491          }
492      }
493 <    static final class FailingFunction implements Function<Integer, Integer> {
494 <        int invocationCount = 0;
493 >
494 >    static class FailingFunction extends CheckedIntegerAction
495 >        implements Function<Integer, Integer>
496 >    {
497 >        final CFException ex;
498 >        FailingFunction(ExecutionMode m) { super(m); ex = new CFException(); }
499          public Integer apply(Integer x) {
500 <            invocationCount++;
501 <            throw new CFException();
500 >            invoked();
501 >            value = x;
502 >            throw ex;
503          }
504      }
505 <    static final class FailingBiFunction implements BiFunction<Integer, Integer, Integer> {
506 <        int invocationCount = 0;
505 >
506 >    static class FailingBiFunction extends CheckedIntegerAction
507 >        implements BiFunction<Integer, Integer, Integer>
508 >    {
509 >        final CFException ex;
510 >        FailingBiFunction(ExecutionMode m) { super(m); ex = new CFException(); }
511          public Integer apply(Integer x, Integer y) {
512 <            invocationCount++;
513 <            throw new CFException();
512 >            invoked();
513 >            value = subtract(x, y);
514 >            throw ex;
515          }
516      }
517 <    static final class FailingNoop implements Runnable {
518 <        int invocationCount = 0;
517 >
518 >    static class FailingRunnable extends CheckedAction implements Runnable {
519 >        final CFException ex;
520 >        FailingRunnable(ExecutionMode m) { super(m); ex = new CFException(); }
521          public void run() {
522 <            invocationCount++;
523 <            throw new CFException();
522 >            invoked();
523 >            throw ex;
524          }
525      }
526  
527 <    static final class CompletableFutureInc
528 <        implements Function<Integer, CompletableFuture<Integer>> {
529 <        int invocationCount = 0;
527 >    static class CompletableFutureInc extends CheckedIntegerAction
528 >        implements Function<Integer, CompletableFuture<Integer>>
529 >    {
530 >        CompletableFutureInc(ExecutionMode m) { super(m); }
531          public CompletableFuture<Integer> apply(Integer x) {
532 <            invocationCount++;
532 >            invoked();
533 >            value = x;
534              CompletableFuture<Integer> f = new CompletableFuture<>();
535 <            f.complete(inc(x));
535 >            assertTrue(f.complete(inc(x)));
536              return f;
537          }
538      }
539  
540 <    static final class FailingCompletableFutureFunction
541 <        implements Function<Integer, CompletableFuture<Integer>> {
542 <        int invocationCount = 0;
540 >    static class FailingCompletableFutureFunction extends CheckedIntegerAction
541 >        implements Function<Integer, CompletableFuture<Integer>>
542 >    {
543 >        final CFException ex;
544 >        FailingCompletableFutureFunction(ExecutionMode m) { super(m); ex = new CFException(); }
545          public CompletableFuture<Integer> apply(Integer x) {
546 <            invocationCount++;
547 <            throw new CFException();
546 >            invoked();
547 >            value = x;
548 >            throw ex;
549 >        }
550 >    }
551 >
552 >    static class CountingRejectingExecutor implements Executor {
553 >        final RejectedExecutionException ex = new RejectedExecutionException();
554 >        final AtomicInteger count = new AtomicInteger(0);
555 >        public void execute(Runnable r) {
556 >            count.getAndIncrement();
557 >            throw ex;
558          }
559      }
560  
561      // Used for explicit executor tests
562      static final class ThreadExecutor implements Executor {
563 <        AtomicInteger count = new AtomicInteger(0);
563 >        final AtomicInteger count = new AtomicInteger(0);
564 >        static final ThreadGroup tg = new ThreadGroup("ThreadExecutor");
565 >        static boolean startedCurrentThread() {
566 >            return Thread.currentThread().getThreadGroup() == tg;
567 >        }
568  
569          public void execute(Runnable r) {
570              count.getAndIncrement();
571 <            new Thread(r).start();
571 >            new Thread(tg, r).start();
572          }
573      }
574  
575 +    static final boolean defaultExecutorIsCommonPool
576 +        = ForkJoinPool.getCommonPoolParallelism() > 1;
577 +
578      /**
579       * Permits the testing of parallel code for the 3 different
580 <     * execution modes without repeating all the testing code.
580 >     * execution modes without copy/pasting all the test methods.
581       */
582      enum ExecutionMode {
583 <        DEFAULT {
583 >        SYNC {
584 >            public void checkExecutionMode() {
585 >                assertFalse(ThreadExecutor.startedCurrentThread());
586 >                assertNull(ForkJoinTask.getPool());
587 >            }
588 >            public CompletableFuture<Void> runAsync(Runnable a) {
589 >                throw new UnsupportedOperationException();
590 >            }
591 >            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
592 >                throw new UnsupportedOperationException();
593 >            }
594              public <T> CompletableFuture<Void> thenRun
595                  (CompletableFuture<T> f, Runnable a) {
596                  return f.thenRun(a);
# Line 521 | Line 654 | public class CompletableFutureTest exten
654              }
655          },
656  
657 <        DEFAULT_ASYNC {
657 >        ASYNC {
658 >            public void checkExecutionMode() {
659 >                assertEquals(defaultExecutorIsCommonPool,
660 >                             (ForkJoinPool.commonPool() == ForkJoinTask.getPool()));
661 >            }
662 >            public CompletableFuture<Void> runAsync(Runnable a) {
663 >                return CompletableFuture.runAsync(a);
664 >            }
665 >            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
666 >                return CompletableFuture.supplyAsync(a);
667 >            }
668              public <T> CompletableFuture<Void> thenRun
669                  (CompletableFuture<T> f, Runnable a) {
670                  return f.thenRunAsync(a);
# Line 586 | Line 729 | public class CompletableFutureTest exten
729          },
730  
731          EXECUTOR {
732 +            public void checkExecutionMode() {
733 +                assertTrue(ThreadExecutor.startedCurrentThread());
734 +            }
735 +            public CompletableFuture<Void> runAsync(Runnable a) {
736 +                return CompletableFuture.runAsync(a, new ThreadExecutor());
737 +            }
738 +            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
739 +                return CompletableFuture.supplyAsync(a, new ThreadExecutor());
740 +            }
741              public <T> CompletableFuture<Void> thenRun
742                  (CompletableFuture<T> f, Runnable a) {
743                  return f.thenRunAsync(a, new ThreadExecutor());
# Line 649 | Line 801 | public class CompletableFutureTest exten
801              }
802          };
803  
804 +        public abstract void checkExecutionMode();
805 +        public abstract CompletableFuture<Void> runAsync(Runnable a);
806 +        public abstract <U> CompletableFuture<U> supplyAsync(Supplier<U> a);
807          public abstract <T> CompletableFuture<Void> thenRun
808              (CompletableFuture<T> f, Runnable a);
809          public abstract <T> CompletableFuture<Void> thenAccept
# Line 698 | Line 853 | public class CompletableFutureTest exten
853      {
854          final AtomicInteger a = new AtomicInteger(0);
855          final CompletableFuture<Integer> f = new CompletableFuture<>();
856 <        if (!createIncomplete) f.complete(v1);
856 >        if (!createIncomplete) assertTrue(f.complete(v1));
857          final CompletableFuture<Integer> g = f.exceptionally
858              ((Throwable t) -> {
704                // Should not be called
859                  a.getAndIncrement();
860 <                throw new AssertionError();
860 >                threadFail("should not be called");
861 >                return null;            // unreached
862              });
863 <        if (createIncomplete) f.complete(v1);
863 >        if (createIncomplete) assertTrue(f.complete(v1));
864  
865          checkCompletedNormally(g, v1);
866          checkCompletedNormally(f, v1);
867          assertEquals(0, a.get());
868      }}
869  
715
870      /**
871       * exceptionally action completes with function value on source
872       * exception
# Line 727 | Line 881 | public class CompletableFutureTest exten
881          if (!createIncomplete) f.completeExceptionally(ex);
882          final CompletableFuture<Integer> g = f.exceptionally
883              ((Throwable t) -> {
884 +                ExecutionMode.SYNC.checkExecutionMode();
885                  threadAssertSame(t, ex);
886                  a.getAndIncrement();
887                  return v1;
# Line 737 | Line 892 | public class CompletableFutureTest exten
892          assertEquals(1, a.get());
893      }}
894  
895 +    /**
896 +     * If an "exceptionally action" throws an exception, it completes
897 +     * exceptionally with that exception
898 +     */
899      public void testExceptionally_exceptionalCompletionActionFailed() {
900          for (boolean createIncomplete : new boolean[] { true, false })
742        for (Integer v1 : new Integer[] { 1, null })
901      {
902          final AtomicInteger a = new AtomicInteger(0);
903          final CFException ex1 = new CFException();
# Line 748 | Line 906 | public class CompletableFutureTest exten
906          if (!createIncomplete) f.completeExceptionally(ex1);
907          final CompletableFuture<Integer> g = f.exceptionally
908              ((Throwable t) -> {
909 +                ExecutionMode.SYNC.checkExecutionMode();
910                  threadAssertSame(t, ex1);
911                  a.getAndIncrement();
912                  throw ex2;
913              });
914          if (createIncomplete) f.completeExceptionally(ex1);
915  
916 <        checkCompletedWithWrappedCFException(g, ex2);
916 >        checkCompletedWithWrappedException(g, ex2);
917 >        checkCompletedExceptionally(f, ex1);
918          assertEquals(1, a.get());
919      }}
920  
921      /**
922 <     * handle action completes normally with function value on normal
923 <     * completion of source
922 >     * whenComplete action executes on normal completion, propagating
923 >     * source result.
924       */
925 <    public void testHandle_normalCompletion() {
925 >    public void testWhenComplete_normalCompletion() {
926          for (ExecutionMode m : ExecutionMode.values())
927          for (boolean createIncomplete : new boolean[] { true, false })
928          for (Integer v1 : new Integer[] { 1, null })
929      {
770        final CompletableFuture<Integer> f = new CompletableFuture<>();
930          final AtomicInteger a = new AtomicInteger(0);
931 <        if (!createIncomplete) f.complete(v1);
932 <        final CompletableFuture<Integer> g = m.handle
931 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
932 >        if (!createIncomplete) assertTrue(f.complete(v1));
933 >        final CompletableFuture<Integer> g = m.whenComplete
934              (f,
935 <             (Integer x, Throwable t) -> {
936 <                threadAssertSame(x, v1);
935 >             (Integer result, Throwable t) -> {
936 >                m.checkExecutionMode();
937 >                threadAssertSame(result, v1);
938                  threadAssertNull(t);
939                  a.getAndIncrement();
779                return inc(v1);
940              });
941 <        if (createIncomplete) f.complete(v1);
941 >        if (createIncomplete) assertTrue(f.complete(v1));
942  
943 <        checkCompletedNormally(g, inc(v1));
943 >        checkCompletedNormally(g, v1);
944          checkCompletedNormally(f, v1);
945          assertEquals(1, a.get());
946      }}
947  
948      /**
949 <     * handle action completes normally with function value on
950 <     * exceptional completion of source
949 >     * whenComplete action executes on exceptional completion, propagating
950 >     * source result.
951       */
952 <    public void testHandle_exceptionalCompletion() {
952 >    public void testWhenComplete_exceptionalCompletion() {
953          for (ExecutionMode m : ExecutionMode.values())
954          for (boolean createIncomplete : new boolean[] { true, false })
795        for (Integer v1 : new Integer[] { 1, null })
955      {
797        final CompletableFuture<Integer> f = new CompletableFuture<>();
956          final AtomicInteger a = new AtomicInteger(0);
957          final CFException ex = new CFException();
958 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
959          if (!createIncomplete) f.completeExceptionally(ex);
960 <        final CompletableFuture<Integer> g = m.handle
960 >        final CompletableFuture<Integer> g = m.whenComplete
961              (f,
962 <             (Integer x, Throwable t) -> {
963 <                threadAssertNull(x);
962 >             (Integer result, Throwable t) -> {
963 >                m.checkExecutionMode();
964 >                threadAssertNull(result);
965                  threadAssertSame(t, ex);
966                  a.getAndIncrement();
807                return v1;
967              });
968          if (createIncomplete) f.completeExceptionally(ex);
969  
970 <        checkCompletedNormally(g, v1);
971 <        checkCompletedWithWrappedCFException(f, ex);
970 >        checkCompletedWithWrappedException(g, ex);
971 >        checkCompletedExceptionally(f, ex);
972          assertEquals(1, a.get());
973      }}
974  
975      /**
976 <     * handle action completes normally with function value on
977 <     * cancelled source
976 >     * whenComplete action executes on cancelled source, propagating
977 >     * CancellationException.
978       */
979 <    public void testHandle_sourceCancelled() {
979 >    public void testWhenComplete_sourceCancelled() {
980          for (ExecutionMode m : ExecutionMode.values())
981          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
982          for (boolean createIncomplete : new boolean[] { true, false })
824        for (Integer v1 : new Integer[] { 1, null })
983      {
826        final CompletableFuture<Integer> f = new CompletableFuture<>();
984          final AtomicInteger a = new AtomicInteger(0);
985 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
986          if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
987 <        final CompletableFuture<Integer> g = m.handle
987 >        final CompletableFuture<Integer> g = m.whenComplete
988              (f,
989 <             (Integer x, Throwable t) -> {
990 <                threadAssertNull(x);
989 >             (Integer result, Throwable t) -> {
990 >                m.checkExecutionMode();
991 >                threadAssertNull(result);
992                  threadAssertTrue(t instanceof CancellationException);
993                  a.getAndIncrement();
835                return v1;
994              });
995          if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
996  
997 <        checkCompletedNormally(g, v1);
997 >        checkCompletedWithWrappedCancellationException(g);
998          checkCancelled(f);
999          assertEquals(1, a.get());
1000      }}
1001  
1002      /**
1003 <     * handle result completes exceptionally if action does
1003 >     * If a whenComplete action throws an exception when triggered by
1004 >     * a normal completion, it completes exceptionally
1005       */
1006 <    public void testHandle_sourceFailedActionFailed() {
848 <        for (ExecutionMode m : ExecutionMode.values())
1006 >    public void testWhenComplete_sourceCompletedNormallyActionFailed() {
1007          for (boolean createIncomplete : new boolean[] { true, false })
1008 +        for (ExecutionMode m : ExecutionMode.values())
1009 +        for (Integer v1 : new Integer[] { 1, null })
1010      {
1011 +        final AtomicInteger a = new AtomicInteger(0);
1012 +        final CFException ex = new CFException();
1013          final CompletableFuture<Integer> f = new CompletableFuture<>();
1014 +        if (!createIncomplete) assertTrue(f.complete(v1));
1015 +        final CompletableFuture<Integer> g = m.whenComplete
1016 +            (f,
1017 +             (Integer result, Throwable t) -> {
1018 +                m.checkExecutionMode();
1019 +                threadAssertSame(result, v1);
1020 +                threadAssertNull(t);
1021 +                a.getAndIncrement();
1022 +                throw ex;
1023 +            });
1024 +        if (createIncomplete) assertTrue(f.complete(v1));
1025 +
1026 +        checkCompletedWithWrappedException(g, ex);
1027 +        checkCompletedNormally(f, v1);
1028 +        assertEquals(1, a.get());
1029 +    }}
1030 +
1031 +    /**
1032 +     * If a whenComplete action throws an exception when triggered by
1033 +     * a source completion that also throws an exception, the source
1034 +     * exception takes precedence (unlike handle)
1035 +     */
1036 +    public void testWhenComplete_sourceFailedActionFailed() {
1037 +        for (boolean createIncomplete : new boolean[] { true, false })
1038 +        for (ExecutionMode m : ExecutionMode.values())
1039 +    {
1040          final AtomicInteger a = new AtomicInteger(0);
1041          final CFException ex1 = new CFException();
1042          final CFException ex2 = new CFException();
1043 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1044 +
1045          if (!createIncomplete) f.completeExceptionally(ex1);
1046 <        final CompletableFuture<Integer> g = m.handle
1046 >        final CompletableFuture<Integer> g = m.whenComplete
1047              (f,
1048 <             (Integer x, Throwable t) -> {
1049 <                threadAssertNull(x);
1050 <                threadAssertSame(ex1, t);
1048 >             (Integer result, Throwable t) -> {
1049 >                m.checkExecutionMode();
1050 >                threadAssertSame(t, ex1);
1051 >                threadAssertNull(result);
1052                  a.getAndIncrement();
1053                  throw ex2;
1054              });
1055          if (createIncomplete) f.completeExceptionally(ex1);
1056  
1057 <        checkCompletedWithWrappedCFException(g, ex2);
1058 <        checkCompletedWithWrappedCFException(f, ex1);
1057 >        checkCompletedWithWrappedException(g, ex1);
1058 >        checkCompletedExceptionally(f, ex1);
1059 >        if (testImplementationDetails) {
1060 >            assertEquals(1, ex1.getSuppressed().length);
1061 >            assertSame(ex2, ex1.getSuppressed()[0]);
1062 >        }
1063          assertEquals(1, a.get());
1064      }}
1065  
1066 <    public void testHandle_sourceCompletedNormallyActionFailed() {
1066 >    /**
1067 >     * handle action completes normally with function value on normal
1068 >     * completion of source
1069 >     */
1070 >    public void testHandle_normalCompletion() {
1071          for (ExecutionMode m : ExecutionMode.values())
1072          for (boolean createIncomplete : new boolean[] { true, false })
1073          for (Integer v1 : new Integer[] { 1, null })
1074      {
1075          final CompletableFuture<Integer> f = new CompletableFuture<>();
1076          final AtomicInteger a = new AtomicInteger(0);
1077 <        final CFException ex = new CFException();
879 <        if (!createIncomplete) f.complete(v1);
1077 >        if (!createIncomplete) assertTrue(f.complete(v1));
1078          final CompletableFuture<Integer> g = m.handle
1079              (f,
1080 <             (Integer x, Throwable t) -> {
1081 <                threadAssertSame(x, v1);
1080 >             (Integer result, Throwable t) -> {
1081 >                m.checkExecutionMode();
1082 >                threadAssertSame(result, v1);
1083                  threadAssertNull(t);
1084                  a.getAndIncrement();
1085 <                throw ex;
1085 >                return inc(v1);
1086              });
1087 <        if (createIncomplete) f.complete(v1);
1087 >        if (createIncomplete) assertTrue(f.complete(v1));
1088  
1089 <        checkCompletedWithWrappedCFException(g, ex);
1089 >        checkCompletedNormally(g, inc(v1));
1090          checkCompletedNormally(f, v1);
1091          assertEquals(1, a.get());
1092      }}
1093  
1094      /**
1095 <     * runAsync completes after running Runnable
1096 <     */
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
1095 >     * handle action completes normally with function value on
1096 >     * exceptional completion of source
1097       */
1098 <    public void testThenCombine_normalCompletion1() {
1135 <        for (boolean createIncomplete : new boolean[] { true, false })
1136 <        for (boolean fFirst : new boolean[] { true, false })
1098 >    public void testHandle_exceptionalCompletion() {
1099          for (ExecutionMode m : ExecutionMode.values())
1100 +        for (boolean createIncomplete : new boolean[] { true, false })
1101          for (Integer v1 : new Integer[] { 1, null })
1139        for (Integer v2 : new Integer[] { 2, null })
1102      {
1103          final CompletableFuture<Integer> f = new CompletableFuture<>();
1104 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1105 <        final SubtractFunction r = new SubtractFunction();
1106 <        CompletableFuture<Integer> h = null;
1107 <        if (createIncomplete) h = m.thenCombine(f, g, r);
1108 <
1109 <        if (fFirst)
1110 <            f.complete(v1);
1111 <        else
1112 <            g.complete(v2);
1113 <        if (createIncomplete) checkIncomplete(h);
1114 <        assertEquals(0, r.invocationCount);
1115 <        if (!fFirst)
1116 <            f.complete(v1);
1155 <        else
1156 <            g.complete(v2);
1157 <        if (!createIncomplete) h = m.thenCombine(f, g, r);
1104 >        final AtomicInteger a = new AtomicInteger(0);
1105 >        final CFException ex = new CFException();
1106 >        if (!createIncomplete) f.completeExceptionally(ex);
1107 >        final CompletableFuture<Integer> g = m.handle
1108 >            (f,
1109 >             (Integer result, Throwable t) -> {
1110 >                m.checkExecutionMode();
1111 >                threadAssertNull(result);
1112 >                threadAssertSame(t, ex);
1113 >                a.getAndIncrement();
1114 >                return v1;
1115 >            });
1116 >        if (createIncomplete) f.completeExceptionally(ex);
1117  
1118 <        checkCompletedNormally(h, subtract(v1, v2));
1119 <        checkCompletedNormally(f, v1);
1120 <        checkCompletedNormally(g, v2);
1162 <        assertEquals(1, r.invocationCount);
1118 >        checkCompletedNormally(g, v1);
1119 >        checkCompletedExceptionally(f, ex);
1120 >        assertEquals(1, a.get());
1121      }}
1122  
1123      /**
1124 <     * thenCombine result completes exceptionally after exceptional
1125 <     * completion of either source
1124 >     * handle action completes normally with function value on
1125 >     * cancelled source
1126       */
1127 <    public void testThenCombine_exceptionalCompletion1() {
1127 >    public void testHandle_sourceCancelled() {
1128          for (ExecutionMode m : ExecutionMode.values())
1129 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1130 +        for (boolean createIncomplete : new boolean[] { true, false })
1131          for (Integer v1 : new Integer[] { 1, null })
1132      {
1133          final CompletableFuture<Integer> f = new CompletableFuture<>();
1134 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1135 <        final SubtractFunction r = new SubtractFunction();
1136 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1137 <        final CFException ex = new CFException();
1138 <
1139 <        f.completeExceptionally(ex);
1140 <        checkIncomplete(h);
1141 <        g.complete(v1);
1134 >        final AtomicInteger a = new AtomicInteger(0);
1135 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1136 >        final CompletableFuture<Integer> g = m.handle
1137 >            (f,
1138 >             (Integer result, Throwable t) -> {
1139 >                m.checkExecutionMode();
1140 >                threadAssertNull(result);
1141 >                threadAssertTrue(t instanceof CancellationException);
1142 >                a.getAndIncrement();
1143 >                return v1;
1144 >            });
1145 >        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1146  
1183        checkCompletedWithWrappedCFException(h, ex);
1184        checkCompletedWithWrappedCFException(f, ex);
1185        assertEquals(0, r.invocationCount);
1147          checkCompletedNormally(g, v1);
1148 +        checkCancelled(f);
1149 +        assertEquals(1, a.get());
1150      }}
1151  
1152 <    public void testThenCombine_exceptionalCompletion2() {
1152 >    /**
1153 >     * If a "handle action" throws an exception when triggered by
1154 >     * a normal completion, it completes exceptionally
1155 >     */
1156 >    public void testHandle_sourceCompletedNormallyActionFailed() {
1157          for (ExecutionMode m : ExecutionMode.values())
1158 +        for (boolean createIncomplete : new boolean[] { true, false })
1159          for (Integer v1 : new Integer[] { 1, null })
1160      {
1161          final CompletableFuture<Integer> f = new CompletableFuture<>();
1162 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1195 <        final SubtractFunction r = new SubtractFunction();
1196 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1162 >        final AtomicInteger a = new AtomicInteger(0);
1163          final CFException ex = new CFException();
1164 +        if (!createIncomplete) assertTrue(f.complete(v1));
1165 +        final CompletableFuture<Integer> g = m.handle
1166 +            (f,
1167 +             (Integer result, Throwable t) -> {
1168 +                m.checkExecutionMode();
1169 +                threadAssertSame(result, v1);
1170 +                threadAssertNull(t);
1171 +                a.getAndIncrement();
1172 +                throw ex;
1173 +            });
1174 +        if (createIncomplete) assertTrue(f.complete(v1));
1175  
1176 <        g.completeExceptionally(ex);
1200 <        checkIncomplete(h);
1201 <        f.complete(v1);
1202 <
1203 <        checkCompletedWithWrappedCFException(h, ex);
1204 <        checkCompletedWithWrappedCFException(g, ex);
1205 <        assertEquals(0, r.invocationCount);
1176 >        checkCompletedWithWrappedException(g, ex);
1177          checkCompletedNormally(f, v1);
1178 +        assertEquals(1, a.get());
1179      }}
1180  
1181 <    public void testThenCombine_exceptionalCompletion3() {
1181 >    /**
1182 >     * If a "handle action" throws an exception when triggered by
1183 >     * a source completion that also throws an exception, the action
1184 >     * exception takes precedence (unlike whenComplete)
1185 >     */
1186 >    public void testHandle_sourceFailedActionFailed() {
1187 >        for (boolean createIncomplete : new boolean[] { true, false })
1188          for (ExecutionMode m : ExecutionMode.values())
1211        for (Integer v1 : new Integer[] { 1, null })
1189      {
1190 +        final AtomicInteger a = new AtomicInteger(0);
1191 +        final CFException ex1 = new CFException();
1192 +        final CFException ex2 = new CFException();
1193          final CompletableFuture<Integer> f = new CompletableFuture<>();
1214        final CompletableFuture<Integer> g = new CompletableFuture<>();
1215        final SubtractFunction r = new SubtractFunction();
1216        final CFException ex = new CFException();
1194  
1195 <        g.completeExceptionally(ex);
1196 <        f.complete(v1);
1197 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1195 >        if (!createIncomplete) f.completeExceptionally(ex1);
1196 >        final CompletableFuture<Integer> g = m.handle
1197 >            (f,
1198 >             (Integer result, Throwable t) -> {
1199 >                m.checkExecutionMode();
1200 >                threadAssertNull(result);
1201 >                threadAssertSame(ex1, t);
1202 >                a.getAndIncrement();
1203 >                throw ex2;
1204 >            });
1205 >        if (createIncomplete) f.completeExceptionally(ex1);
1206  
1207 <        checkCompletedWithWrappedCFException(h, ex);
1208 <        checkCompletedWithWrappedCFException(g, ex);
1209 <        assertEquals(0, r.invocationCount);
1225 <        checkCompletedNormally(f, v1);
1207 >        checkCompletedWithWrappedException(g, ex2);
1208 >        checkCompletedExceptionally(f, ex1);
1209 >        assertEquals(1, a.get());
1210      }}
1211  
1212 <    public void testThenCombine_exceptionalCompletion4() {
1213 <        for (ExecutionMode m : ExecutionMode.values())
1214 <        for (Integer v1 : new Integer[] { 1, null })
1212 >    /**
1213 >     * runAsync completes after running Runnable
1214 >     */
1215 >    public void testRunAsync_normalCompletion() {
1216 >        ExecutionMode[] executionModes = {
1217 >            ExecutionMode.ASYNC,
1218 >            ExecutionMode.EXECUTOR,
1219 >        };
1220 >        for (ExecutionMode m : executionModes)
1221      {
1222 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1223 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1224 <        final SubtractFunction r = new SubtractFunction();
1225 <        final CFException ex = new CFException();
1226 <
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);
1222 >        final Noop r = new Noop(m);
1223 >        final CompletableFuture<Void> f = m.runAsync(r);
1224 >        assertNull(f.join());
1225 >        checkCompletedNormally(f, null);
1226 >        r.assertInvoked();
1227      }}
1228  
1229      /**
1230 <     * thenCombine result completes exceptionally if action does
1230 >     * failing runAsync completes exceptionally after running Runnable
1231       */
1232 <    public void testThenCombine_actionFailed1() {
1233 <        for (ExecutionMode m : ExecutionMode.values())
1234 <        for (Integer v1 : new Integer[] { 1, null })
1235 <        for (Integer v2 : new Integer[] { 2, null })
1232 >    public void testRunAsync_exceptionalCompletion() {
1233 >        ExecutionMode[] executionModes = {
1234 >            ExecutionMode.ASYNC,
1235 >            ExecutionMode.EXECUTOR,
1236 >        };
1237 >        for (ExecutionMode m : executionModes)
1238      {
1239 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1240 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1241 <        final FailingBiFunction r = new FailingBiFunction();
1242 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1239 >        final FailingRunnable r = new FailingRunnable(m);
1240 >        final CompletableFuture<Void> f = m.runAsync(r);
1241 >        checkCompletedWithWrappedException(f, r.ex);
1242 >        r.assertInvoked();
1243 >    }}
1244  
1245 <        f.complete(v1);
1246 <        checkIncomplete(h);
1247 <        g.complete(v2);
1245 >    public void testRunAsync_rejectingExecutor() {
1246 >        CountingRejectingExecutor e = new CountingRejectingExecutor();
1247 >        try {
1248 >            CompletableFuture.runAsync(() -> {}, e);
1249 >            shouldThrow();
1250 >        } catch (Throwable t) {
1251 >            assertSame(e.ex, t);
1252 >        }
1253  
1254 <        checkCompletedWithWrappedCFException(h);
1255 <        checkCompletedNormally(f, v1);
1266 <        checkCompletedNormally(g, v2);
1267 <    }}
1254 >        assertEquals(1, e.count.get());
1255 >    }
1256  
1257 <    public void testThenCombine_actionFailed2() {
1258 <        for (ExecutionMode m : ExecutionMode.values())
1257 >    /**
1258 >     * supplyAsync completes with result of supplier
1259 >     */
1260 >    public void testSupplyAsync_normalCompletion() {
1261 >        ExecutionMode[] executionModes = {
1262 >            ExecutionMode.ASYNC,
1263 >            ExecutionMode.EXECUTOR,
1264 >        };
1265 >        for (ExecutionMode m : executionModes)
1266          for (Integer v1 : new Integer[] { 1, null })
1272        for (Integer v2 : new Integer[] { 2, null })
1267      {
1268 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1269 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1270 <        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);
1268 >        final IntegerSupplier r = new IntegerSupplier(m, v1);
1269 >        final CompletableFuture<Integer> f = m.supplyAsync(r);
1270 >        assertSame(v1, f.join());
1271          checkCompletedNormally(f, v1);
1272 <        checkCompletedNormally(g, v2);
1272 >        r.assertInvoked();
1273      }}
1274  
1275      /**
1276 <     * thenCombine result completes exceptionally if either source cancelled
1276 >     * Failing supplyAsync completes exceptionally
1277       */
1278 <    public void testThenCombine_sourceCancelled1() {
1279 <        for (ExecutionMode m : ExecutionMode.values())
1280 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1281 <        for (Integer v1 : new Integer[] { 1, null })
1278 >    public void testSupplyAsync_exceptionalCompletion() {
1279 >        ExecutionMode[] executionModes = {
1280 >            ExecutionMode.ASYNC,
1281 >            ExecutionMode.EXECUTOR,
1282 >        };
1283 >        for (ExecutionMode m : executionModes)
1284      {
1285 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1286 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1287 <        final SubtractFunction r = new SubtractFunction();
1288 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1285 >        FailingSupplier r = new FailingSupplier(m);
1286 >        CompletableFuture<Integer> f = m.supplyAsync(r);
1287 >        checkCompletedWithWrappedException(f, r.ex);
1288 >        r.assertInvoked();
1289 >    }}
1290  
1291 <        assertTrue(f.cancel(mayInterruptIfRunning));
1292 <        checkIncomplete(h);
1293 <        g.complete(v1);
1291 >    public void testSupplyAsync_rejectingExecutor() {
1292 >        CountingRejectingExecutor e = new CountingRejectingExecutor();
1293 >        try {
1294 >            CompletableFuture.supplyAsync(() -> null, e);
1295 >            shouldThrow();
1296 >        } catch (Throwable t) {
1297 >            assertSame(e.ex, t);
1298 >        }
1299  
1300 <        checkCompletedWithWrappedCancellationException(h);
1301 <        checkCancelled(f);
1307 <        assertEquals(0, r.invocationCount);
1308 <        checkCompletedNormally(g, v1);
1309 <    }}
1300 >        assertEquals(1, e.count.get());
1301 >    }
1302  
1303 <    public void testThenCombine_sourceCancelled2() {
1303 >    // seq completion methods
1304 >
1305 >    /**
1306 >     * thenRun result completes normally after normal completion of source
1307 >     */
1308 >    public void testThenRun_normalCompletion() {
1309          for (ExecutionMode m : ExecutionMode.values())
1313        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1310          for (Integer v1 : new Integer[] { 1, null })
1311      {
1312          final CompletableFuture<Integer> f = new CompletableFuture<>();
1313 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1314 <        final SubtractFunction r = new SubtractFunction();
1319 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1313 >        final Noop[] rs = new Noop[6];
1314 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1315  
1316 <        assertTrue(g.cancel(mayInterruptIfRunning));
1317 <        checkIncomplete(h);
1318 <        f.complete(v1);
1316 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1317 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1318 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1319 >        checkIncomplete(h0);
1320 >        checkIncomplete(h1);
1321 >        checkIncomplete(h2);
1322 >        assertTrue(f.complete(v1));
1323 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1324 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1325 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1326  
1327 <        checkCompletedWithWrappedCancellationException(h);
1328 <        checkCancelled(g);
1329 <        assertEquals(0, r.invocationCount);
1327 >        checkCompletedNormally(h0, null);
1328 >        checkCompletedNormally(h1, null);
1329 >        checkCompletedNormally(h2, null);
1330 >        checkCompletedNormally(h3, null);
1331 >        checkCompletedNormally(h4, null);
1332 >        checkCompletedNormally(h5, null);
1333          checkCompletedNormally(f, v1);
1334 +        for (Noop r : rs) r.assertInvoked();
1335      }}
1336  
1337 <    public void testThenCombine_sourceCancelled3() {
1337 >    /**
1338 >     * thenRun result completes exceptionally after exceptional
1339 >     * completion of source
1340 >     */
1341 >    public void testThenRun_exceptionalCompletion() {
1342          for (ExecutionMode m : ExecutionMode.values())
1333        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1334        for (Integer v1 : new Integer[] { 1, null })
1343      {
1344 +        final CFException ex = new CFException();
1345          final CompletableFuture<Integer> f = new CompletableFuture<>();
1346 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1347 <        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);
1346 >        final Noop[] rs = new Noop[6];
1347 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1348  
1349 <        checkCompletedWithWrappedCancellationException(h);
1350 <        checkCancelled(g);
1351 <        assertEquals(0, r.invocationCount);
1352 <        checkCompletedNormally(f, v1);
1349 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1350 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1351 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1352 >        checkIncomplete(h0);
1353 >        checkIncomplete(h1);
1354 >        checkIncomplete(h2);
1355 >        assertTrue(f.completeExceptionally(ex));
1356 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1357 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1358 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1359 >
1360 >        checkCompletedWithWrappedException(h0, ex);
1361 >        checkCompletedWithWrappedException(h1, ex);
1362 >        checkCompletedWithWrappedException(h2, ex);
1363 >        checkCompletedWithWrappedException(h3, ex);
1364 >        checkCompletedWithWrappedException(h4, ex);
1365 >        checkCompletedWithWrappedException(h5, ex);
1366 >        checkCompletedExceptionally(f, ex);
1367 >        for (Noop r : rs) r.assertNotInvoked();
1368      }}
1369  
1370 <    public void testThenCombine_sourceCancelled4() {
1370 >    /**
1371 >     * thenRun result completes exceptionally if source cancelled
1372 >     */
1373 >    public void testThenRun_sourceCancelled() {
1374          for (ExecutionMode m : ExecutionMode.values())
1375          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1353        for (Integer v1 : new Integer[] { 1, null })
1376      {
1377          final CompletableFuture<Integer> f = new CompletableFuture<>();
1378 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1379 <        final SubtractFunction r = new SubtractFunction();
1378 >        final Noop[] rs = new Noop[6];
1379 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1380  
1381 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1382 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1383 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1384 +        checkIncomplete(h0);
1385 +        checkIncomplete(h1);
1386 +        checkIncomplete(h2);
1387          assertTrue(f.cancel(mayInterruptIfRunning));
1388 <        g.complete(v1);
1389 <        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1390 <
1391 <        checkCompletedWithWrappedCancellationException(h);
1388 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1389 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1390 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1391 >
1392 >        checkCompletedWithWrappedCancellationException(h0);
1393 >        checkCompletedWithWrappedCancellationException(h1);
1394 >        checkCompletedWithWrappedCancellationException(h2);
1395 >        checkCompletedWithWrappedCancellationException(h3);
1396 >        checkCompletedWithWrappedCancellationException(h4);
1397 >        checkCompletedWithWrappedCancellationException(h5);
1398          checkCancelled(f);
1399 <        assertEquals(0, r.invocationCount);
1366 <        checkCompletedNormally(g, v1);
1399 >        for (Noop r : rs) r.assertNotInvoked();
1400      }}
1401  
1402      /**
1403 <     * thenAcceptBoth result completes normally after normal
1371 <     * completion of sources
1403 >     * thenRun result completes exceptionally if action does
1404       */
1405 <    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() {
1395 <        for (ExecutionMode m : ExecutionMode.values())
1396 <        for (Integer v1 : new Integer[] { 1, null })
1397 <        for (Integer v2 : new Integer[] { 2, null })
1398 <    {
1399 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1400 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1401 <        final SubtractAction r = new SubtractAction();
1402 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1403 <
1404 <        g.complete(v2);
1405 <        checkIncomplete(h);
1406 <        assertEquals(0, r.invocationCount);
1407 <        f.complete(v1);
1408 <
1409 <        checkCompletedNormally(h, null);
1410 <        assertEquals(subtract(v1, v2), r.value);
1411 <        checkCompletedNormally(f, v1);
1412 <        checkCompletedNormally(g, v2);
1413 <    }}
1414 <
1415 <    public void testThenAcceptBoth_normalCompletion3() {
1405 >    public void testThenRun_actionFailed() {
1406          for (ExecutionMode m : ExecutionMode.values())
1407          for (Integer v1 : new Integer[] { 1, null })
1418        for (Integer v2 : new Integer[] { 2, null })
1408      {
1409          final CompletableFuture<Integer> f = new CompletableFuture<>();
1410 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1411 <        final SubtractAction r = new SubtractAction();
1410 >        final FailingRunnable[] rs = new FailingRunnable[6];
1411 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
1412  
1413 <        g.complete(v2);
1414 <        f.complete(v1);
1415 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1413 >        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1414 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1415 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1416 >        assertTrue(f.complete(v1));
1417 >        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1418 >        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1419 >        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1420  
1421 <        checkCompletedNormally(h, null);
1422 <        assertEquals(subtract(v1, v2), r.value);
1421 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1422 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1423 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1424 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1425 >        checkCompletedWithWrappedException(h4, rs[4].ex);
1426 >        checkCompletedWithWrappedException(h5, rs[5].ex);
1427          checkCompletedNormally(f, v1);
1431        checkCompletedNormally(g, v2);
1428      }}
1429  
1430 <    public void testThenAcceptBoth_normalCompletion4() {
1430 >    /**
1431 >     * thenApply result completes normally after normal completion of source
1432 >     */
1433 >    public void testThenApply_normalCompletion() {
1434          for (ExecutionMode m : ExecutionMode.values())
1435          for (Integer v1 : new Integer[] { 1, null })
1437        for (Integer v2 : new Integer[] { 2, null })
1436      {
1437          final CompletableFuture<Integer> f = new CompletableFuture<>();
1438 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1439 <        final SubtractAction r = new SubtractAction();
1438 >        final IncFunction[] rs = new IncFunction[4];
1439 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1440  
1441 <        f.complete(v1);
1442 <        g.complete(v2);
1443 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1441 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1442 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1443 >        checkIncomplete(h0);
1444 >        checkIncomplete(h1);
1445 >        assertTrue(f.complete(v1));
1446 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1447 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1448  
1449 <        checkCompletedNormally(h, null);
1450 <        assertEquals(subtract(v1, v2), r.value);
1449 >        checkCompletedNormally(h0, inc(v1));
1450 >        checkCompletedNormally(h1, inc(v1));
1451 >        checkCompletedNormally(h2, inc(v1));
1452 >        checkCompletedNormally(h3, inc(v1));
1453          checkCompletedNormally(f, v1);
1454 <        checkCompletedNormally(g, v2);
1454 >        for (IncFunction r : rs) r.assertValue(inc(v1));
1455      }}
1456  
1457      /**
1458 <     * thenAcceptBoth result completes exceptionally after exceptional
1459 <     * completion of either source
1458 >     * thenApply result completes exceptionally after exceptional
1459 >     * completion of source
1460       */
1461 <    public void testThenAcceptBoth_exceptionalCompletion1() {
1461 >    public void testThenApply_exceptionalCompletion() {
1462          for (ExecutionMode m : ExecutionMode.values())
1459        for (Integer v1 : new Integer[] { 1, null })
1463      {
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);
1464          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    {
1465          final CompletableFuture<Integer> f = new CompletableFuture<>();
1466 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1467 <        final SubtractAction r = new SubtractAction();
1484 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1485 <        final CFException ex = new CFException();
1466 >        final IncFunction[] rs = new IncFunction[4];
1467 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1468  
1469 <        g.completeExceptionally(ex);
1470 <        checkIncomplete(h);
1471 <        f.complete(v1);
1472 <
1473 <        checkCompletedWithWrappedCFException(h, ex);
1474 <        checkCompletedWithWrappedCFException(g, ex);
1475 <        assertEquals(0, r.invocationCount);
1476 <        checkCompletedNormally(f, v1);
1469 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1470 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1471 >        assertTrue(f.completeExceptionally(ex));
1472 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1473 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1474 >
1475 >        checkCompletedWithWrappedException(h0, ex);
1476 >        checkCompletedWithWrappedException(h1, ex);
1477 >        checkCompletedWithWrappedException(h2, ex);
1478 >        checkCompletedWithWrappedException(h3, ex);
1479 >        checkCompletedExceptionally(f, ex);
1480 >        for (IncFunction r : rs) r.assertNotInvoked();
1481      }}
1482  
1483 <    public void testThenAcceptBoth_exceptionalCompletion3() {
1483 >    /**
1484 >     * thenApply result completes exceptionally if source cancelled
1485 >     */
1486 >    public void testThenApply_sourceCancelled() {
1487          for (ExecutionMode m : ExecutionMode.values())
1488 <        for (Integer v1 : new Integer[] { 1, null })
1488 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1489      {
1490          final CompletableFuture<Integer> f = new CompletableFuture<>();
1491 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1492 <        final SubtractAction r = new SubtractAction();
1504 <        final CFException ex = new CFException();
1491 >        final IncFunction[] rs = new IncFunction[4];
1492 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1493  
1494 <        g.completeExceptionally(ex);
1495 <        f.complete(v1);
1496 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1494 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1495 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1496 >        assertTrue(f.cancel(mayInterruptIfRunning));
1497 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1498 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1499  
1500 <        checkCompletedWithWrappedCFException(h, ex);
1501 <        checkCompletedWithWrappedCFException(g, ex);
1502 <        assertEquals(0, r.invocationCount);
1503 <        checkCompletedNormally(f, v1);
1500 >        checkCompletedWithWrappedCancellationException(h0);
1501 >        checkCompletedWithWrappedCancellationException(h1);
1502 >        checkCompletedWithWrappedCancellationException(h2);
1503 >        checkCompletedWithWrappedCancellationException(h3);
1504 >        checkCancelled(f);
1505 >        for (IncFunction r : rs) r.assertNotInvoked();
1506      }}
1507  
1508 <    public void testThenAcceptBoth_exceptionalCompletion4() {
1508 >    /**
1509 >     * thenApply result completes exceptionally if action does
1510 >     */
1511 >    public void testThenApply_actionFailed() {
1512          for (ExecutionMode m : ExecutionMode.values())
1513          for (Integer v1 : new Integer[] { 1, null })
1514      {
1515          final CompletableFuture<Integer> f = new CompletableFuture<>();
1516 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1517 <        final SubtractAction r = new SubtractAction();
1523 <        final CFException ex = new CFException();
1516 >        final FailingFunction[] rs = new FailingFunction[4];
1517 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
1518  
1519 <        f.completeExceptionally(ex);
1520 <        g.complete(v1);
1521 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1519 >        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1520 >        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1521 >        assertTrue(f.complete(v1));
1522 >        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1523 >        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1524  
1525 <        checkCompletedWithWrappedCFException(h, ex);
1526 <        checkCompletedWithWrappedCFException(f, ex);
1527 <        assertEquals(0, r.invocationCount);
1528 <        checkCompletedNormally(g, v1);
1525 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1526 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1527 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1528 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1529 >        checkCompletedNormally(f, v1);
1530      }}
1531  
1532      /**
1533 <     * thenAcceptBoth result completes exceptionally if action does
1533 >     * thenAccept result completes normally after normal completion of source
1534       */
1535 <    public void testThenAcceptBoth_actionFailed1() {
1535 >    public void testThenAccept_normalCompletion() {
1536          for (ExecutionMode m : ExecutionMode.values())
1537          for (Integer v1 : new Integer[] { 1, null })
1541        for (Integer v2 : new Integer[] { 2, null })
1538      {
1539          final CompletableFuture<Integer> f = new CompletableFuture<>();
1540 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1541 <        final FailingBiConsumer r = new FailingBiConsumer();
1546 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1540 >        final NoopConsumer[] rs = new NoopConsumer[4];
1541 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1542  
1543 <        f.complete(v1);
1544 <        checkIncomplete(h);
1545 <        g.complete(v2);
1543 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1544 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1545 >        checkIncomplete(h0);
1546 >        checkIncomplete(h1);
1547 >        assertTrue(f.complete(v1));
1548 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1549 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1550  
1551 <        checkCompletedWithWrappedCFException(h);
1551 >        checkCompletedNormally(h0, null);
1552 >        checkCompletedNormally(h1, null);
1553 >        checkCompletedNormally(h2, null);
1554 >        checkCompletedNormally(h3, null);
1555          checkCompletedNormally(f, v1);
1556 <        checkCompletedNormally(g, v2);
1556 >        for (NoopConsumer r : rs) r.assertValue(v1);
1557      }}
1558  
1559 <    public void testThenAcceptBoth_actionFailed2() {
1559 >    /**
1560 >     * thenAccept result completes exceptionally after exceptional
1561 >     * completion of source
1562 >     */
1563 >    public void testThenAccept_exceptionalCompletion() {
1564          for (ExecutionMode m : ExecutionMode.values())
1559        for (Integer v1 : new Integer[] { 1, null })
1560        for (Integer v2 : new Integer[] { 2, null })
1565      {
1566 +        final CFException ex = new CFException();
1567          final CompletableFuture<Integer> f = new CompletableFuture<>();
1568 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1569 <        final FailingBiConsumer r = new FailingBiConsumer();
1565 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1568 >        final NoopConsumer[] rs = new NoopConsumer[4];
1569 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1570  
1571 <        g.complete(v2);
1572 <        checkIncomplete(h);
1573 <        f.complete(v1);
1574 <
1575 <        checkCompletedWithWrappedCFException(h);
1576 <        checkCompletedNormally(f, v1);
1577 <        checkCompletedNormally(g, v2);
1571 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1572 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1573 >        assertTrue(f.completeExceptionally(ex));
1574 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1575 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1576 >
1577 >        checkCompletedWithWrappedException(h0, ex);
1578 >        checkCompletedWithWrappedException(h1, ex);
1579 >        checkCompletedWithWrappedException(h2, ex);
1580 >        checkCompletedWithWrappedException(h3, ex);
1581 >        checkCompletedExceptionally(f, ex);
1582 >        for (NoopConsumer r : rs) r.assertNotInvoked();
1583      }}
1584  
1585      /**
1586 <     * thenAcceptBoth result completes exceptionally if either source cancelled
1586 >     * thenAccept result completes exceptionally if source cancelled
1587       */
1588 <    public void testThenAcceptBoth_sourceCancelled1() {
1588 >    public void testThenAccept_sourceCancelled() {
1589          for (ExecutionMode m : ExecutionMode.values())
1590          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1582        for (Integer v1 : new Integer[] { 1, null })
1591      {
1592          final CompletableFuture<Integer> f = new CompletableFuture<>();
1593 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1594 <        final SubtractAction r = new SubtractAction();
1587 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1593 >        final NoopConsumer[] rs = new NoopConsumer[4];
1594 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1595  
1596 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1597 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1598          assertTrue(f.cancel(mayInterruptIfRunning));
1599 <        checkIncomplete(h);
1600 <        g.complete(v1);
1599 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1600 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1601  
1602 <        checkCompletedWithWrappedCancellationException(h);
1602 >        checkCompletedWithWrappedCancellationException(h0);
1603 >        checkCompletedWithWrappedCancellationException(h1);
1604 >        checkCompletedWithWrappedCancellationException(h2);
1605 >        checkCompletedWithWrappedCancellationException(h3);
1606          checkCancelled(f);
1607 <        assertEquals(0, r.invocationCount);
1596 <        checkCompletedNormally(g, v1);
1607 >        for (NoopConsumer r : rs) r.assertNotInvoked();
1608      }}
1609  
1610 <    public void testThenAcceptBoth_sourceCancelled2() {
1610 >    /**
1611 >     * thenAccept result completes exceptionally if action does
1612 >     */
1613 >    public void testThenAccept_actionFailed() {
1614          for (ExecutionMode m : ExecutionMode.values())
1601        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1615          for (Integer v1 : new Integer[] { 1, null })
1616      {
1617          final CompletableFuture<Integer> f = new CompletableFuture<>();
1618 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1619 <        final SubtractAction r = new SubtractAction();
1607 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1618 >        final FailingConsumer[] rs = new FailingConsumer[4];
1619 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
1620  
1621 <        assertTrue(g.cancel(mayInterruptIfRunning));
1622 <        checkIncomplete(h);
1623 <        f.complete(v1);
1621 >        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1622 >        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1623 >        assertTrue(f.complete(v1));
1624 >        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1625 >        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1626  
1627 <        checkCompletedWithWrappedCancellationException(h);
1628 <        checkCancelled(g);
1629 <        assertEquals(0, r.invocationCount);
1627 >        checkCompletedWithWrappedException(h0, rs[0].ex);
1628 >        checkCompletedWithWrappedException(h1, rs[1].ex);
1629 >        checkCompletedWithWrappedException(h2, rs[2].ex);
1630 >        checkCompletedWithWrappedException(h3, rs[3].ex);
1631          checkCompletedNormally(f, v1);
1632      }}
1633  
1634 <    public void testThenAcceptBoth_sourceCancelled3() {
1634 >    /**
1635 >     * thenCombine result completes normally after normal completion
1636 >     * of sources
1637 >     */
1638 >    public void testThenCombine_normalCompletion() {
1639          for (ExecutionMode m : ExecutionMode.values())
1640 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1640 >        for (boolean fFirst : new boolean[] { true, false })
1641          for (Integer v1 : new Integer[] { 1, null })
1642 +        for (Integer v2 : new Integer[] { 2, null })
1643      {
1644          final CompletableFuture<Integer> f = new CompletableFuture<>();
1645          final CompletableFuture<Integer> g = new CompletableFuture<>();
1646 <        final SubtractAction r = new SubtractAction();
1646 >        final SubtractFunction[] rs = new SubtractFunction[6];
1647 >        for (int i = 0; i < rs.length; i++) rs[i] = new SubtractFunction(m);
1648  
1649 <        assertTrue(g.cancel(mayInterruptIfRunning));
1650 <        f.complete(v1);
1651 <        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1649 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1650 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1651 >        final Integer w1 =  fFirst ? v1 : v2;
1652 >        final Integer w2 = !fFirst ? v1 : v2;
1653 >
1654 >        final CompletableFuture<Integer> h0 = m.thenCombine(f, g, rs[0]);
1655 >        final CompletableFuture<Integer> h1 = m.thenCombine(fst, fst, rs[1]);
1656 >        assertTrue(fst.complete(w1));
1657 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, rs[2]);
1658 >        final CompletableFuture<Integer> h3 = m.thenCombine(fst, fst, rs[3]);
1659 >        checkIncomplete(h0); rs[0].assertNotInvoked();
1660 >        checkIncomplete(h2); rs[2].assertNotInvoked();
1661 >        checkCompletedNormally(h1, subtract(w1, w1));
1662 >        checkCompletedNormally(h3, subtract(w1, w1));
1663 >        rs[1].assertValue(subtract(w1, w1));
1664 >        rs[3].assertValue(subtract(w1, w1));
1665 >        assertTrue(snd.complete(w2));
1666 >        final CompletableFuture<Integer> h4 = m.thenCombine(f, g, rs[4]);
1667 >
1668 >        checkCompletedNormally(h0, subtract(v1, v2));
1669 >        checkCompletedNormally(h2, subtract(v1, v2));
1670 >        checkCompletedNormally(h4, subtract(v1, v2));
1671 >        rs[0].assertValue(subtract(v1, v2));
1672 >        rs[2].assertValue(subtract(v1, v2));
1673 >        rs[4].assertValue(subtract(v1, v2));
1674  
1632        checkCompletedWithWrappedCancellationException(h);
1633        checkCancelled(g);
1634        assertEquals(0, r.invocationCount);
1675          checkCompletedNormally(f, v1);
1676 <    }}
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);
1676 >        checkCompletedNormally(g, v2);
1677      }}
1678  
1679      /**
1680 <     * runAfterBoth result completes normally after normal
1681 <     * completion of sources
1680 >     * thenCombine result completes exceptionally after exceptional
1681 >     * completion of either source
1682       */
1683 <    public void testRunAfterBoth_normalCompletion1() {
1683 >    public void testThenCombine_exceptionalCompletion() throws Throwable {
1684          for (ExecutionMode m : ExecutionMode.values())
1685 +        for (boolean fFirst : new boolean[] { true, false })
1686 +        for (boolean failFirst : new boolean[] { true, false })
1687          for (Integer v1 : new Integer[] { 1, null })
1664        for (Integer v2 : new Integer[] { 2, null })
1688      {
1689          final CompletableFuture<Integer> f = new CompletableFuture<>();
1690          final CompletableFuture<Integer> g = new CompletableFuture<>();
1691 <        final Noop r = new Noop();
1692 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1693 <
1694 <        f.complete(v1);
1695 <        checkIncomplete(h);
1696 <        assertEquals(0, r.invocationCount);
1697 <        g.complete(v2);
1698 <
1699 <        checkCompletedNormally(h, null);
1700 <        assertEquals(1, r.invocationCount);
1701 <        checkCompletedNormally(f, v1);
1702 <        checkCompletedNormally(g, v2);
1691 >        final CFException ex = new CFException();
1692 >        final SubtractFunction r1 = new SubtractFunction(m);
1693 >        final SubtractFunction r2 = new SubtractFunction(m);
1694 >        final SubtractFunction r3 = new SubtractFunction(m);
1695 >
1696 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1697 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1698 >        final Callable<Boolean> complete1 = failFirst ?
1699 >            () -> fst.completeExceptionally(ex) :
1700 >            () -> fst.complete(v1);
1701 >        final Callable<Boolean> complete2 = failFirst ?
1702 >            () -> snd.complete(v1) :
1703 >            () -> snd.completeExceptionally(ex);
1704 >
1705 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1706 >        assertTrue(complete1.call());
1707 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1708 >        checkIncomplete(h1);
1709 >        checkIncomplete(h2);
1710 >        assertTrue(complete2.call());
1711 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1712 >
1713 >        checkCompletedWithWrappedException(h1, ex);
1714 >        checkCompletedWithWrappedException(h2, ex);
1715 >        checkCompletedWithWrappedException(h3, ex);
1716 >        r1.assertNotInvoked();
1717 >        r2.assertNotInvoked();
1718 >        r3.assertNotInvoked();
1719 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1720 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1721      }}
1722  
1723 <    public void testRunAfterBoth_normalCompletion2() {
1723 >    /**
1724 >     * thenCombine result completes exceptionally if either source cancelled
1725 >     */
1726 >    public void testThenCombine_sourceCancelled() throws Throwable {
1727          for (ExecutionMode m : ExecutionMode.values())
1728 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1729 +        for (boolean fFirst : new boolean[] { true, false })
1730 +        for (boolean failFirst : new boolean[] { true, false })
1731          for (Integer v1 : new Integer[] { 1, null })
1685        for (Integer v2 : new Integer[] { 2, null })
1732      {
1733          final CompletableFuture<Integer> f = new CompletableFuture<>();
1734          final CompletableFuture<Integer> g = new CompletableFuture<>();
1735 <        final Noop r = new Noop();
1736 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1737 <
1738 <        g.complete(v2);
1739 <        checkIncomplete(h);
1740 <        assertEquals(0, r.invocationCount);
1741 <        f.complete(v1);
1742 <
1743 <        checkCompletedNormally(h, null);
1744 <        assertEquals(1, r.invocationCount);
1745 <        checkCompletedNormally(f, v1);
1746 <        checkCompletedNormally(g, v2);
1735 >        final SubtractFunction r1 = new SubtractFunction(m);
1736 >        final SubtractFunction r2 = new SubtractFunction(m);
1737 >        final SubtractFunction r3 = new SubtractFunction(m);
1738 >
1739 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1740 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1741 >        final Callable<Boolean> complete1 = failFirst ?
1742 >            () -> fst.cancel(mayInterruptIfRunning) :
1743 >            () -> fst.complete(v1);
1744 >        final Callable<Boolean> complete2 = failFirst ?
1745 >            () -> snd.complete(v1) :
1746 >            () -> snd.cancel(mayInterruptIfRunning);
1747 >
1748 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1749 >        assertTrue(complete1.call());
1750 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1751 >        checkIncomplete(h1);
1752 >        checkIncomplete(h2);
1753 >        assertTrue(complete2.call());
1754 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1755 >
1756 >        checkCompletedWithWrappedCancellationException(h1);
1757 >        checkCompletedWithWrappedCancellationException(h2);
1758 >        checkCompletedWithWrappedCancellationException(h3);
1759 >        r1.assertNotInvoked();
1760 >        r2.assertNotInvoked();
1761 >        r3.assertNotInvoked();
1762 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1763 >        checkCancelled(failFirst ? fst : snd);
1764      }}
1765  
1766 <    public void testRunAfterBoth_normalCompletion3() {
1766 >    /**
1767 >     * thenCombine result completes exceptionally if action does
1768 >     */
1769 >    public void testThenCombine_actionFailed() {
1770          for (ExecutionMode m : ExecutionMode.values())
1771 +        for (boolean fFirst : new boolean[] { true, false })
1772          for (Integer v1 : new Integer[] { 1, null })
1773          for (Integer v2 : new Integer[] { 2, null })
1774      {
1775          final CompletableFuture<Integer> f = new CompletableFuture<>();
1776          final CompletableFuture<Integer> g = new CompletableFuture<>();
1777 <        final Noop r = new Noop();
1778 <
1779 <        g.complete(v2);
1780 <        f.complete(v1);
1781 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1782 <
1783 <        checkCompletedNormally(h, null);
1784 <        assertEquals(1, r.invocationCount);
1777 >        final FailingBiFunction r1 = new FailingBiFunction(m);
1778 >        final FailingBiFunction r2 = new FailingBiFunction(m);
1779 >        final FailingBiFunction r3 = new FailingBiFunction(m);
1780 >
1781 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1782 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1783 >        final Integer w1 =  fFirst ? v1 : v2;
1784 >        final Integer w2 = !fFirst ? v1 : v2;
1785 >
1786 >        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1787 >        assertTrue(fst.complete(w1));
1788 >        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1789 >        assertTrue(snd.complete(w2));
1790 >        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1791 >
1792 >        checkCompletedWithWrappedException(h1, r1.ex);
1793 >        checkCompletedWithWrappedException(h2, r2.ex);
1794 >        checkCompletedWithWrappedException(h3, r3.ex);
1795 >        r1.assertInvoked();
1796 >        r2.assertInvoked();
1797 >        r3.assertInvoked();
1798          checkCompletedNormally(f, v1);
1799          checkCompletedNormally(g, v2);
1800      }}
1801  
1802 <    public void testRunAfterBoth_normalCompletion4() {
1802 >    /**
1803 >     * thenAcceptBoth result completes normally after normal
1804 >     * completion of sources
1805 >     */
1806 >    public void testThenAcceptBoth_normalCompletion() {
1807          for (ExecutionMode m : ExecutionMode.values())
1808 +        for (boolean fFirst : new boolean[] { true, false })
1809          for (Integer v1 : new Integer[] { 1, null })
1810          for (Integer v2 : new Integer[] { 2, null })
1811      {
1812          final CompletableFuture<Integer> f = new CompletableFuture<>();
1813          final CompletableFuture<Integer> g = new CompletableFuture<>();
1814 <        final Noop r = new Noop();
1815 <
1816 <        f.complete(v1);
1817 <        g.complete(v2);
1818 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1819 <
1820 <        checkCompletedNormally(h, null);
1821 <        assertEquals(1, r.invocationCount);
1814 >        final SubtractAction r1 = new SubtractAction(m);
1815 >        final SubtractAction r2 = new SubtractAction(m);
1816 >        final SubtractAction r3 = new SubtractAction(m);
1817 >
1818 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1819 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1820 >        final Integer w1 =  fFirst ? v1 : v2;
1821 >        final Integer w2 = !fFirst ? v1 : v2;
1822 >
1823 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1824 >        assertTrue(fst.complete(w1));
1825 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1826 >        checkIncomplete(h1);
1827 >        checkIncomplete(h2);
1828 >        r1.assertNotInvoked();
1829 >        r2.assertNotInvoked();
1830 >        assertTrue(snd.complete(w2));
1831 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1832 >
1833 >        checkCompletedNormally(h1, null);
1834 >        checkCompletedNormally(h2, null);
1835 >        checkCompletedNormally(h3, null);
1836 >        r1.assertValue(subtract(v1, v2));
1837 >        r2.assertValue(subtract(v1, v2));
1838 >        r3.assertValue(subtract(v1, v2));
1839          checkCompletedNormally(f, v1);
1840          checkCompletedNormally(g, v2);
1841      }}
1842  
1843      /**
1844 <     * runAfterBoth result completes exceptionally after exceptional
1844 >     * thenAcceptBoth result completes exceptionally after exceptional
1845       * completion of either source
1846       */
1847 <    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() {
1847 >    public void testThenAcceptBoth_exceptionalCompletion() throws Throwable {
1848          for (ExecutionMode m : ExecutionMode.values())
1849 +        for (boolean fFirst : new boolean[] { true, false })
1850 +        for (boolean failFirst : new boolean[] { true, false })
1851          for (Integer v1 : new Integer[] { 1, null })
1852      {
1853          final CompletableFuture<Integer> f = new CompletableFuture<>();
1854          final CompletableFuture<Integer> g = new CompletableFuture<>();
1771        final Noop r = new Noop();
1772        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1855          final CFException ex = new CFException();
1856 <
1857 <        g.completeExceptionally(ex);
1858 <        checkIncomplete(h);
1859 <        f.complete(v1);
1860 <
1861 <        checkCompletedWithWrappedCFException(h, ex);
1862 <        checkCompletedWithWrappedCFException(g, ex);
1863 <        assertEquals(0, r.invocationCount);
1864 <        checkCompletedNormally(f, v1);
1856 >        final SubtractAction r1 = new SubtractAction(m);
1857 >        final SubtractAction r2 = new SubtractAction(m);
1858 >        final SubtractAction r3 = new SubtractAction(m);
1859 >
1860 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1861 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1862 >        final Callable<Boolean> complete1 = failFirst ?
1863 >            () -> fst.completeExceptionally(ex) :
1864 >            () -> fst.complete(v1);
1865 >        final Callable<Boolean> complete2 = failFirst ?
1866 >            () -> snd.complete(v1) :
1867 >            () -> snd.completeExceptionally(ex);
1868 >
1869 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1870 >        assertTrue(complete1.call());
1871 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1872 >        checkIncomplete(h1);
1873 >        checkIncomplete(h2);
1874 >        assertTrue(complete2.call());
1875 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1876 >
1877 >        checkCompletedWithWrappedException(h1, ex);
1878 >        checkCompletedWithWrappedException(h2, ex);
1879 >        checkCompletedWithWrappedException(h3, ex);
1880 >        r1.assertNotInvoked();
1881 >        r2.assertNotInvoked();
1882 >        r3.assertNotInvoked();
1883 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1884 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1885      }}
1886  
1887 <    public void testRunAfterBoth_exceptionalCompletion3() {
1888 <        for (ExecutionMode m : ExecutionMode.values())
1889 <        for (Integer v1 : new Integer[] { 1, null })
1890 <    {
1789 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
1790 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
1791 <        final Noop r = new Noop();
1792 <        final CFException ex = new CFException();
1793 <
1794 <        g.completeExceptionally(ex);
1795 <        f.complete(v1);
1796 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1797 <
1798 <        checkCompletedWithWrappedCFException(h, ex);
1799 <        checkCompletedWithWrappedCFException(g, ex);
1800 <        assertEquals(0, r.invocationCount);
1801 <        checkCompletedNormally(f, v1);
1802 <    }}
1803 <
1804 <    public void testRunAfterBoth_exceptionalCompletion4() {
1887 >    /**
1888 >     * thenAcceptBoth result completes exceptionally if either source cancelled
1889 >     */
1890 >    public void testThenAcceptBoth_sourceCancelled() throws Throwable {
1891          for (ExecutionMode m : ExecutionMode.values())
1892 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1893 +        for (boolean fFirst : new boolean[] { true, false })
1894 +        for (boolean failFirst : new boolean[] { true, false })
1895          for (Integer v1 : new Integer[] { 1, null })
1896      {
1897          final CompletableFuture<Integer> f = new CompletableFuture<>();
1898          final CompletableFuture<Integer> g = new CompletableFuture<>();
1899 <        final Noop r = new Noop();
1900 <        final CFException ex = new CFException();
1901 <
1902 <        f.completeExceptionally(ex);
1903 <        g.complete(v1);
1904 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1905 <
1906 <        checkCompletedWithWrappedCFException(h, ex);
1907 <        checkCompletedWithWrappedCFException(f, ex);
1908 <        assertEquals(0, r.invocationCount);
1909 <        checkCompletedNormally(g, v1);
1899 >        final SubtractAction r1 = new SubtractAction(m);
1900 >        final SubtractAction r2 = new SubtractAction(m);
1901 >        final SubtractAction r3 = new SubtractAction(m);
1902 >
1903 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1904 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1905 >        final Callable<Boolean> complete1 = failFirst ?
1906 >            () -> fst.cancel(mayInterruptIfRunning) :
1907 >            () -> fst.complete(v1);
1908 >        final Callable<Boolean> complete2 = failFirst ?
1909 >            () -> snd.complete(v1) :
1910 >            () -> snd.cancel(mayInterruptIfRunning);
1911 >
1912 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1913 >        assertTrue(complete1.call());
1914 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1915 >        checkIncomplete(h1);
1916 >        checkIncomplete(h2);
1917 >        assertTrue(complete2.call());
1918 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1919 >
1920 >        checkCompletedWithWrappedCancellationException(h1);
1921 >        checkCompletedWithWrappedCancellationException(h2);
1922 >        checkCompletedWithWrappedCancellationException(h3);
1923 >        r1.assertNotInvoked();
1924 >        r2.assertNotInvoked();
1925 >        r3.assertNotInvoked();
1926 >        checkCompletedNormally(failFirst ? snd : fst, v1);
1927 >        checkCancelled(failFirst ? fst : snd);
1928      }}
1929  
1930      /**
1931 <     * runAfterBoth result completes exceptionally if action does
1931 >     * thenAcceptBoth result completes exceptionally if action does
1932       */
1933 <    public void testRunAfterBoth_actionFailed1() {
1933 >    public void testThenAcceptBoth_actionFailed() {
1934          for (ExecutionMode m : ExecutionMode.values())
1935 +        for (boolean fFirst : new boolean[] { true, false })
1936          for (Integer v1 : new Integer[] { 1, null })
1937          for (Integer v2 : new Integer[] { 2, null })
1938      {
1939          final CompletableFuture<Integer> f = new CompletableFuture<>();
1940          final CompletableFuture<Integer> g = new CompletableFuture<>();
1941 <        final FailingNoop r = new FailingNoop();
1942 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1943 <
1944 <        f.complete(v1);
1945 <        checkIncomplete(h);
1946 <        g.complete(v2);
1947 <
1948 <        checkCompletedWithWrappedCFException(h);
1941 >        final FailingBiConsumer r1 = new FailingBiConsumer(m);
1942 >        final FailingBiConsumer r2 = new FailingBiConsumer(m);
1943 >        final FailingBiConsumer r3 = new FailingBiConsumer(m);
1944 >
1945 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1946 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1947 >        final Integer w1 =  fFirst ? v1 : v2;
1948 >        final Integer w2 = !fFirst ? v1 : v2;
1949 >
1950 >        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1951 >        assertTrue(fst.complete(w1));
1952 >        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1953 >        assertTrue(snd.complete(w2));
1954 >        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1955 >
1956 >        checkCompletedWithWrappedException(h1, r1.ex);
1957 >        checkCompletedWithWrappedException(h2, r2.ex);
1958 >        checkCompletedWithWrappedException(h3, r3.ex);
1959 >        r1.assertInvoked();
1960 >        r2.assertInvoked();
1961 >        r3.assertInvoked();
1962          checkCompletedNormally(f, v1);
1963          checkCompletedNormally(g, v2);
1964      }}
1965  
1966 <    public void testRunAfterBoth_actionFailed2() {
1966 >    /**
1967 >     * runAfterBoth result completes normally after normal
1968 >     * completion of sources
1969 >     */
1970 >    public void testRunAfterBoth_normalCompletion() {
1971          for (ExecutionMode m : ExecutionMode.values())
1972 +        for (boolean fFirst : new boolean[] { true, false })
1973          for (Integer v1 : new Integer[] { 1, null })
1974          for (Integer v2 : new Integer[] { 2, null })
1975      {
1976          final CompletableFuture<Integer> f = new CompletableFuture<>();
1977          final CompletableFuture<Integer> g = new CompletableFuture<>();
1978 <        final FailingNoop r = new FailingNoop();
1979 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1980 <
1981 <        g.complete(v2);
1982 <        checkIncomplete(h);
1983 <        f.complete(v1);
1984 <
1985 <        checkCompletedWithWrappedCFException(h);
1978 >        final Noop r1 = new Noop(m);
1979 >        final Noop r2 = new Noop(m);
1980 >        final Noop r3 = new Noop(m);
1981 >
1982 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1983 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1984 >        final Integer w1 =  fFirst ? v1 : v2;
1985 >        final Integer w2 = !fFirst ? v1 : v2;
1986 >
1987 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
1988 >        assertTrue(fst.complete(w1));
1989 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
1990 >        checkIncomplete(h1);
1991 >        checkIncomplete(h2);
1992 >        r1.assertNotInvoked();
1993 >        r2.assertNotInvoked();
1994 >        assertTrue(snd.complete(w2));
1995 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
1996 >
1997 >        checkCompletedNormally(h1, null);
1998 >        checkCompletedNormally(h2, null);
1999 >        checkCompletedNormally(h3, null);
2000 >        r1.assertInvoked();
2001 >        r2.assertInvoked();
2002 >        r3.assertInvoked();
2003          checkCompletedNormally(f, v1);
2004          checkCompletedNormally(g, v2);
2005      }}
2006  
2007      /**
2008 <     * runAfterBoth result completes exceptionally if either source cancelled
2008 >     * runAfterBoth result completes exceptionally after exceptional
2009 >     * completion of either source
2010       */
2011 <    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() {
2011 >    public void testRunAfterBoth_exceptionalCompletion() throws Throwable {
2012          for (ExecutionMode m : ExecutionMode.values())
2013 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2014 <        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() {
1908 <        for (ExecutionMode m : ExecutionMode.values())
1909 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2013 >        for (boolean fFirst : new boolean[] { true, false })
2014 >        for (boolean failFirst : new boolean[] { true, false })
2015          for (Integer v1 : new Integer[] { 1, null })
2016      {
2017          final CompletableFuture<Integer> f = new CompletableFuture<>();
2018          final CompletableFuture<Integer> g = new CompletableFuture<>();
2019 <        final Noop r = new Noop();
2020 <
2021 <        assertTrue(g.cancel(mayInterruptIfRunning));
2022 <        f.complete(v1);
2023 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
2024 <
2025 <        checkCompletedWithWrappedCancellationException(h);
2026 <        checkCancelled(g);
2027 <        assertEquals(0, r.invocationCount);
2028 <        checkCompletedNormally(f, v1);
2019 >        final CFException ex = new CFException();
2020 >        final Noop r1 = new Noop(m);
2021 >        final Noop r2 = new Noop(m);
2022 >        final Noop r3 = new Noop(m);
2023 >
2024 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2025 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2026 >        final Callable<Boolean> complete1 = failFirst ?
2027 >            () -> fst.completeExceptionally(ex) :
2028 >            () -> fst.complete(v1);
2029 >        final Callable<Boolean> complete2 = failFirst ?
2030 >            () -> snd.complete(v1) :
2031 >            () -> snd.completeExceptionally(ex);
2032 >
2033 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2034 >        assertTrue(complete1.call());
2035 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2036 >        checkIncomplete(h1);
2037 >        checkIncomplete(h2);
2038 >        assertTrue(complete2.call());
2039 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2040 >
2041 >        checkCompletedWithWrappedException(h1, ex);
2042 >        checkCompletedWithWrappedException(h2, ex);
2043 >        checkCompletedWithWrappedException(h3, ex);
2044 >        r1.assertNotInvoked();
2045 >        r2.assertNotInvoked();
2046 >        r3.assertNotInvoked();
2047 >        checkCompletedNormally(failFirst ? snd : fst, v1);
2048 >        checkCompletedExceptionally(failFirst ? fst : snd, ex);
2049      }}
2050  
2051 <    public void testRunAfterBoth_sourceCancelled4() {
2051 >    /**
2052 >     * runAfterBoth result completes exceptionally if either source cancelled
2053 >     */
2054 >    public void testRunAfterBoth_sourceCancelled() throws Throwable {
2055          for (ExecutionMode m : ExecutionMode.values())
2056          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2057 +        for (boolean fFirst : new boolean[] { true, false })
2058 +        for (boolean failFirst : new boolean[] { true, false })
2059          for (Integer v1 : new Integer[] { 1, null })
2060      {
2061          final CompletableFuture<Integer> f = new CompletableFuture<>();
2062          final CompletableFuture<Integer> g = new CompletableFuture<>();
2063 <        final Noop r = new Noop();
2064 <
2065 <        assertTrue(f.cancel(mayInterruptIfRunning));
2066 <        g.complete(v1);
2067 <        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
2068 <
2069 <        checkCompletedWithWrappedCancellationException(h);
2070 <        checkCancelled(f);
2071 <        assertEquals(0, r.invocationCount);
2072 <        checkCompletedNormally(g, v1);
2063 >        final Noop r1 = new Noop(m);
2064 >        final Noop r2 = new Noop(m);
2065 >        final Noop r3 = new Noop(m);
2066 >
2067 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2068 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2069 >        final Callable<Boolean> complete1 = failFirst ?
2070 >            () -> fst.cancel(mayInterruptIfRunning) :
2071 >            () -> fst.complete(v1);
2072 >        final Callable<Boolean> complete2 = failFirst ?
2073 >            () -> snd.complete(v1) :
2074 >            () -> snd.cancel(mayInterruptIfRunning);
2075 >
2076 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2077 >        assertTrue(complete1.call());
2078 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2079 >        checkIncomplete(h1);
2080 >        checkIncomplete(h2);
2081 >        assertTrue(complete2.call());
2082 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2083 >
2084 >        checkCompletedWithWrappedCancellationException(h1);
2085 >        checkCompletedWithWrappedCancellationException(h2);
2086 >        checkCompletedWithWrappedCancellationException(h3);
2087 >        r1.assertNotInvoked();
2088 >        r2.assertNotInvoked();
2089 >        r3.assertNotInvoked();
2090 >        checkCompletedNormally(failFirst ? snd : fst, v1);
2091 >        checkCancelled(failFirst ? fst : snd);
2092      }}
2093  
2094      /**
2095 <     * applyToEither result completes normally after normal completion
1947 <     * of either source
2095 >     * runAfterBoth result completes exceptionally if action does
2096       */
2097 <    public void testApplyToEither_normalCompletion1() {
2097 >    public void testRunAfterBoth_actionFailed() {
2098          for (ExecutionMode m : ExecutionMode.values())
2099 +        for (boolean fFirst : new boolean[] { true, false })
2100          for (Integer v1 : new Integer[] { 1, null })
2101          for (Integer v2 : new Integer[] { 2, null })
2102      {
2103          final CompletableFuture<Integer> f = new CompletableFuture<>();
2104          final CompletableFuture<Integer> g = new CompletableFuture<>();
2105 <        final IncFunction r = new IncFunction();
2106 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2107 <
2108 <        f.complete(v1);
2109 <        checkCompletedNormally(h, inc(v1));
2110 <        g.complete(v2);
2111 <
2105 >        final FailingRunnable r1 = new FailingRunnable(m);
2106 >        final FailingRunnable r2 = new FailingRunnable(m);
2107 >        final FailingRunnable r3 = new FailingRunnable(m);
2108 >
2109 >        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2110 >        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2111 >        final Integer w1 =  fFirst ? v1 : v2;
2112 >        final Integer w2 = !fFirst ? v1 : v2;
2113 >
2114 >        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2115 >        assertTrue(fst.complete(w1));
2116 >        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2117 >        assertTrue(snd.complete(w2));
2118 >        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2119 >
2120 >        checkCompletedWithWrappedException(h1, r1.ex);
2121 >        checkCompletedWithWrappedException(h2, r2.ex);
2122 >        checkCompletedWithWrappedException(h3, r3.ex);
2123 >        r1.assertInvoked();
2124 >        r2.assertInvoked();
2125 >        r3.assertInvoked();
2126          checkCompletedNormally(f, v1);
2127          checkCompletedNormally(g, v2);
1965        checkCompletedNormally(h, inc(v1));
2128      }}
2129  
2130 <    public void testApplyToEither_normalCompletion2() {
2130 >    /**
2131 >     * applyToEither result completes normally after normal completion
2132 >     * of either source
2133 >     */
2134 >    public void testApplyToEither_normalCompletion() {
2135          for (ExecutionMode m : ExecutionMode.values())
2136          for (Integer v1 : new Integer[] { 1, null })
2137          for (Integer v2 : new Integer[] { 2, null })
2138      {
2139          final CompletableFuture<Integer> f = new CompletableFuture<>();
2140          final CompletableFuture<Integer> g = new CompletableFuture<>();
2141 <        final IncFunction r = new IncFunction();
2142 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2141 >        final IncFunction[] rs = new IncFunction[6];
2142 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2143  
2144 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2145 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2146 +        checkIncomplete(h0);
2147 +        checkIncomplete(h1);
2148 +        rs[0].assertNotInvoked();
2149 +        rs[1].assertNotInvoked();
2150 +        f.complete(v1);
2151 +        checkCompletedNormally(h0, inc(v1));
2152 +        checkCompletedNormally(h1, inc(v1));
2153 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2154 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2155 +        checkCompletedNormally(h2, inc(v1));
2156 +        checkCompletedNormally(h3, inc(v1));
2157          g.complete(v2);
1979        checkCompletedNormally(h, inc(v2));
1980        f.complete(v1);
2158  
2159 <        checkCompletedNormally(f, v1);
2160 <        checkCompletedNormally(g, v2);
2161 <        checkCompletedNormally(h, inc(v2));
2162 <        }}
2163 <
2164 <    public void testApplyToEither_normalCompletion3() {
2165 <        for (ExecutionMode m : ExecutionMode.values())
2166 <        for (Integer v1 : new Integer[] { 1, null })
2167 <        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);
2159 >        // unspecified behavior - both source completions available
2160 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2161 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2162 >        rs[4].assertValue(h4.join());
2163 >        rs[5].assertValue(h5.join());
2164 >        assertTrue(Objects.equals(inc(v1), h4.join()) ||
2165 >                   Objects.equals(inc(v2), h4.join()));
2166 >        assertTrue(Objects.equals(inc(v1), h5.join()) ||
2167 >                   Objects.equals(inc(v2), h5.join()));
2168  
2169          checkCompletedNormally(f, v1);
2170          checkCompletedNormally(g, v2);
2171 <
2172 <        // unspecified behavior
2173 <        assertTrue(Objects.equals(h.join(), inc(v1)) ||
2174 <                   Objects.equals(h.join(), inc(v2)));
2175 <        assertEquals(1, r.invocationCount);
2171 >        checkCompletedNormally(h0, inc(v1));
2172 >        checkCompletedNormally(h1, inc(v1));
2173 >        checkCompletedNormally(h2, inc(v1));
2174 >        checkCompletedNormally(h3, inc(v1));
2175 >        for (int i = 0; i < 4; i++) rs[i].assertValue(inc(v1));
2176      }}
2177  
2178      /**
2179       * applyToEither result completes exceptionally after exceptional
2180       * completion of either source
2181       */
2182 <    public void testApplyToEither_exceptionalCompletion1() {
2182 >    public void testApplyToEither_exceptionalCompletion() {
2183          for (ExecutionMode m : ExecutionMode.values())
2184          for (Integer v1 : new Integer[] { 1, null })
2185      {
2186          final CompletableFuture<Integer> f = new CompletableFuture<>();
2187          final CompletableFuture<Integer> g = new CompletableFuture<>();
2019        final IncFunction r = new IncFunction();
2020        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2188          final CFException ex = new CFException();
2189 +        final IncFunction[] rs = new IncFunction[6];
2190 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2191  
2192 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2193 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2194 +        checkIncomplete(h0);
2195 +        checkIncomplete(h1);
2196 +        rs[0].assertNotInvoked();
2197 +        rs[1].assertNotInvoked();
2198          f.completeExceptionally(ex);
2199 <        checkCompletedWithWrappedCFException(h, ex);
2199 >        checkCompletedWithWrappedException(h0, ex);
2200 >        checkCompletedWithWrappedException(h1, ex);
2201 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2202 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2203 >        checkCompletedWithWrappedException(h2, ex);
2204 >        checkCompletedWithWrappedException(h3, ex);
2205          g.complete(v1);
2206  
2207 <        assertEquals(0, r.invocationCount);
2207 >        // unspecified behavior - both source completions available
2208 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2209 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2210 >        try {
2211 >            assertEquals(inc(v1), h4.join());
2212 >            rs[4].assertValue(inc(v1));
2213 >        } catch (CompletionException ok) {
2214 >            checkCompletedWithWrappedException(h4, ex);
2215 >            rs[4].assertNotInvoked();
2216 >        }
2217 >        try {
2218 >            assertEquals(inc(v1), h5.join());
2219 >            rs[5].assertValue(inc(v1));
2220 >        } catch (CompletionException ok) {
2221 >            checkCompletedWithWrappedException(h5, ex);
2222 >            rs[5].assertNotInvoked();
2223 >        }
2224 >
2225 >        checkCompletedExceptionally(f, ex);
2226          checkCompletedNormally(g, v1);
2227 <        checkCompletedWithWrappedCFException(f, ex);
2228 <        checkCompletedWithWrappedCFException(h, ex);
2227 >        checkCompletedWithWrappedException(h0, ex);
2228 >        checkCompletedWithWrappedException(h1, ex);
2229 >        checkCompletedWithWrappedException(h2, ex);
2230 >        checkCompletedWithWrappedException(h3, ex);
2231 >        checkCompletedWithWrappedException(h4, ex);
2232 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2233      }}
2234  
2235      public void testApplyToEither_exceptionalCompletion2() {
2236          for (ExecutionMode m : ExecutionMode.values())
2237 +        for (boolean fFirst : new boolean[] { true, false })
2238          for (Integer v1 : new Integer[] { 1, null })
2239      {
2240          final CompletableFuture<Integer> f = new CompletableFuture<>();
2241          final CompletableFuture<Integer> g = new CompletableFuture<>();
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();
2242          final CFException ex = new CFException();
2243 +        final IncFunction[] rs = new IncFunction[6];
2244 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2245  
2246 <        g.completeExceptionally(ex);
2247 <        f.complete(v1);
2248 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2246 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2247 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2248 >        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2249 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2250 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2251 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2252  
2253 <        // unspecified behavior
2067 <        Integer v;
2253 >        // unspecified behavior - both source completions available
2254          try {
2255 <            assertEquals(inc(v1), h.join());
2256 <            assertEquals(1, r.invocationCount);
2255 >            assertEquals(inc(v1), h0.join());
2256 >            rs[0].assertValue(inc(v1));
2257          } catch (CompletionException ok) {
2258 <            checkCompletedWithWrappedCFException(h, ex);
2259 <            assertEquals(0, r.invocationCount);
2258 >            checkCompletedWithWrappedException(h0, ex);
2259 >            rs[0].assertNotInvoked();
2260          }
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;
2261          try {
2262 <            assertEquals(inc(v1), h.join());
2263 <            assertEquals(1, r.invocationCount);
2262 >            assertEquals(inc(v1), h1.join());
2263 >            rs[1].assertValue(inc(v1));
2264          } catch (CompletionException ok) {
2265 <            checkCompletedWithWrappedCFException(h, ex);
2266 <            assertEquals(0, r.invocationCount);
2265 >            checkCompletedWithWrappedException(h1, ex);
2266 >            rs[1].assertNotInvoked();
2267 >        }
2268 >        try {
2269 >            assertEquals(inc(v1), h2.join());
2270 >            rs[2].assertValue(inc(v1));
2271 >        } catch (CompletionException ok) {
2272 >            checkCompletedWithWrappedException(h2, ex);
2273 >            rs[2].assertNotInvoked();
2274 >        }
2275 >        try {
2276 >            assertEquals(inc(v1), h3.join());
2277 >            rs[3].assertValue(inc(v1));
2278 >        } catch (CompletionException ok) {
2279 >            checkCompletedWithWrappedException(h3, ex);
2280 >            rs[3].assertNotInvoked();
2281          }
2282  
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);
2283          checkCompletedNormally(f, v1);
2284 <        checkCompletedNormally(g, v2);
2284 >        checkCompletedExceptionally(g, ex);
2285      }}
2286  
2287      /**
2288       * applyToEither result completes exceptionally if either source cancelled
2289       */
2290 <    public void testApplyToEither_sourceCancelled1() {
2290 >    public void testApplyToEither_sourceCancelled() {
2291          for (ExecutionMode m : ExecutionMode.values())
2292          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2293          for (Integer v1 : new Integer[] { 1, null })
2294      {
2295          final CompletableFuture<Integer> f = new CompletableFuture<>();
2296          final CompletableFuture<Integer> g = new CompletableFuture<>();
2297 <        final IncFunction r = new IncFunction();
2298 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2297 >        final IncFunction[] rs = new IncFunction[6];
2298 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2299  
2300 <        assertTrue(f.cancel(mayInterruptIfRunning));
2301 <        checkCompletedWithWrappedCancellationException(h);
2300 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2301 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2302 >        checkIncomplete(h0);
2303 >        checkIncomplete(h1);
2304 >        rs[0].assertNotInvoked();
2305 >        rs[1].assertNotInvoked();
2306 >        f.cancel(mayInterruptIfRunning);
2307 >        checkCompletedWithWrappedCancellationException(h0);
2308 >        checkCompletedWithWrappedCancellationException(h1);
2309 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2310 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2311 >        checkCompletedWithWrappedCancellationException(h2);
2312 >        checkCompletedWithWrappedCancellationException(h3);
2313          g.complete(v1);
2314  
2315 +        // unspecified behavior - both source completions available
2316 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2317 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2318 +        try {
2319 +            assertEquals(inc(v1), h4.join());
2320 +            rs[4].assertValue(inc(v1));
2321 +        } catch (CompletionException ok) {
2322 +            checkCompletedWithWrappedCancellationException(h4);
2323 +            rs[4].assertNotInvoked();
2324 +        }
2325 +        try {
2326 +            assertEquals(inc(v1), h5.join());
2327 +            rs[5].assertValue(inc(v1));
2328 +        } catch (CompletionException ok) {
2329 +            checkCompletedWithWrappedCancellationException(h5);
2330 +            rs[5].assertNotInvoked();
2331 +        }
2332 +
2333          checkCancelled(f);
2162        assertEquals(0, r.invocationCount);
2334          checkCompletedNormally(g, v1);
2335 <        checkCompletedWithWrappedCancellationException(h);
2335 >        checkCompletedWithWrappedCancellationException(h0);
2336 >        checkCompletedWithWrappedCancellationException(h1);
2337 >        checkCompletedWithWrappedCancellationException(h2);
2338 >        checkCompletedWithWrappedCancellationException(h3);
2339 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2340      }}
2341  
2342      public void testApplyToEither_sourceCancelled2() {
2343          for (ExecutionMode m : ExecutionMode.values())
2344          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2345 +        for (boolean fFirst : new boolean[] { true, false })
2346          for (Integer v1 : new Integer[] { 1, null })
2347      {
2348          final CompletableFuture<Integer> f = new CompletableFuture<>();
2349          final CompletableFuture<Integer> g = new CompletableFuture<>();
2350 <        final IncFunction r = new IncFunction();
2351 <        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();
2350 >        final IncFunction[] rs = new IncFunction[6];
2351 >        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2352  
2353 <        assertTrue(g.cancel(mayInterruptIfRunning));
2354 <        f.complete(v1);
2355 <        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
2353 >        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2354 >        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2355 >        assertTrue(fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2356 >        assertTrue(!fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2357 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2358 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2359  
2360 <        // unspecified behavior
2201 <        Integer v;
2360 >        // unspecified behavior - both source completions available
2361          try {
2362 <            assertEquals(inc(v1), h.join());
2363 <            assertEquals(1, r.invocationCount);
2362 >            assertEquals(inc(v1), h0.join());
2363 >            rs[0].assertValue(inc(v1));
2364          } catch (CompletionException ok) {
2365 <            checkCompletedWithWrappedCancellationException(h);
2366 <            assertEquals(0, r.invocationCount);
2365 >            checkCompletedWithWrappedCancellationException(h0);
2366 >            rs[0].assertNotInvoked();
2367 >        }
2368 >        try {
2369 >            assertEquals(inc(v1), h1.join());
2370 >            rs[1].assertValue(inc(v1));
2371 >        } catch (CompletionException ok) {
2372 >            checkCompletedWithWrappedCancellationException(h1);
2373 >            rs[1].assertNotInvoked();
2374          }
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;
2375          try {
2376 <            assertEquals(inc(v1), h.join());
2377 <            assertEquals(1, r.invocationCount);
2376 >            assertEquals(inc(v1), h2.join());
2377 >            rs[2].assertValue(inc(v1));
2378          } catch (CompletionException ok) {
2379 <            checkCompletedWithWrappedCancellationException(h);
2380 <            assertEquals(0, r.invocationCount);
2379 >            checkCompletedWithWrappedCancellationException(h2);
2380 >            rs[2].assertNotInvoked();
2381 >        }
2382 >        try {
2383 >            assertEquals(inc(v1), h3.join());
2384 >            rs[3].assertValue(inc(v1));
2385 >        } catch (CompletionException ok) {
2386 >            checkCompletedWithWrappedCancellationException(h3);
2387 >            rs[3].assertNotInvoked();
2388          }
2389  
2390 <        checkCancelled(f);
2391 <        checkCompletedNormally(g, v1);
2390 >        checkCompletedNormally(f, v1);
2391 >        checkCancelled(g);
2392      }}
2393  
2394      /**
2395 <     * acceptEither result completes normally after normal completion
2243 <     * of either source
2395 >     * applyToEither result completes exceptionally if action does
2396       */
2397 <    public void testAcceptEither_normalCompletion1() {
2397 >    public void testApplyToEither_actionFailed() {
2398          for (ExecutionMode m : ExecutionMode.values())
2399          for (Integer v1 : new Integer[] { 1, null })
2400          for (Integer v2 : new Integer[] { 2, null })
2401      {
2402          final CompletableFuture<Integer> f = new CompletableFuture<>();
2403          final CompletableFuture<Integer> g = new CompletableFuture<>();
2404 <        final IncAction r = new IncAction();
2405 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2404 >        final FailingFunction[] rs = new FailingFunction[6];
2405 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
2406  
2407 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2408 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2409          f.complete(v1);
2410 <        checkCompletedNormally(h, null);
2411 <        assertEquals(inc(v1), r.value);
2412 <        g.complete(v2);
2413 <
2414 <        checkCompletedNormally(f, v1);
2415 <        checkCompletedNormally(g, v2);
2416 <        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);
2410 >        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2411 >        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2412 >        checkCompletedWithWrappedException(h0, rs[0].ex);
2413 >        checkCompletedWithWrappedException(h1, rs[1].ex);
2414 >        checkCompletedWithWrappedException(h2, rs[2].ex);
2415 >        checkCompletedWithWrappedException(h3, rs[3].ex);
2416 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2417  
2418          g.complete(v2);
2419 <        checkCompletedNormally(h, null);
2420 <        assertEquals(inc(v2), r.value);
2421 <        f.complete(v1);
2419 >
2420 >        // unspecified behavior - both source completions available
2421 >        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2422 >        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2423 >
2424 >        checkCompletedWithWrappedException(h4, rs[4].ex);
2425 >        assertTrue(Objects.equals(v1, rs[4].value) ||
2426 >                   Objects.equals(v2, rs[4].value));
2427 >        checkCompletedWithWrappedException(h5, rs[5].ex);
2428 >        assertTrue(Objects.equals(v1, rs[5].value) ||
2429 >                   Objects.equals(v2, rs[5].value));
2430  
2431          checkCompletedNormally(f, v1);
2432          checkCompletedNormally(g, v2);
2282        checkCompletedNormally(h, null);
2433      }}
2434  
2435 <    public void testAcceptEither_normalCompletion3() {
2435 >    /**
2436 >     * acceptEither result completes normally after normal completion
2437 >     * of either source
2438 >     */
2439 >    public void testAcceptEither_normalCompletion() {
2440          for (ExecutionMode m : ExecutionMode.values())
2441          for (Integer v1 : new Integer[] { 1, null })
2442          for (Integer v2 : new Integer[] { 2, null })
2443      {
2444          final CompletableFuture<Integer> f = new CompletableFuture<>();
2445          final CompletableFuture<Integer> g = new CompletableFuture<>();
2446 <        final IncAction r = new IncAction();
2446 >        final NoopConsumer[] rs = new NoopConsumer[6];
2447 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2448  
2449 <        f.complete(v1);
2449 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2450 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2451 >        checkIncomplete(h0);
2452 >        checkIncomplete(h1);
2453 >        rs[0].assertNotInvoked();
2454 >        rs[1].assertNotInvoked();
2455 >        f.complete(v1);
2456 >        checkCompletedNormally(h0, null);
2457 >        checkCompletedNormally(h1, null);
2458 >        rs[0].assertValue(v1);
2459 >        rs[1].assertValue(v1);
2460 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2461 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2462 >        checkCompletedNormally(h2, null);
2463 >        checkCompletedNormally(h3, null);
2464 >        rs[2].assertValue(v1);
2465 >        rs[3].assertValue(v1);
2466          g.complete(v2);
2296        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2467  
2468 <        checkCompletedNormally(h, null);
2468 >        // unspecified behavior - both source completions available
2469 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2470 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2471 >        checkCompletedNormally(h4, null);
2472 >        checkCompletedNormally(h5, null);
2473 >        assertTrue(Objects.equals(v1, rs[4].value) ||
2474 >                   Objects.equals(v2, rs[4].value));
2475 >        assertTrue(Objects.equals(v1, rs[5].value) ||
2476 >                   Objects.equals(v2, rs[5].value));
2477 >
2478          checkCompletedNormally(f, v1);
2479          checkCompletedNormally(g, v2);
2480 <
2481 <        // unspecified behavior
2482 <        assertTrue(Objects.equals(r.value, inc(v1)) ||
2483 <                   Objects.equals(r.value, inc(v2)));
2480 >        checkCompletedNormally(h0, null);
2481 >        checkCompletedNormally(h1, null);
2482 >        checkCompletedNormally(h2, null);
2483 >        checkCompletedNormally(h3, null);
2484 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2485      }}
2486  
2487      /**
2488       * acceptEither result completes exceptionally after exceptional
2489       * completion of either source
2490       */
2491 <    public void testAcceptEither_exceptionalCompletion1() {
2491 >    public void testAcceptEither_exceptionalCompletion() {
2492          for (ExecutionMode m : ExecutionMode.values())
2493          for (Integer v1 : new Integer[] { 1, null })
2494      {
2495          final CompletableFuture<Integer> f = new CompletableFuture<>();
2496          final CompletableFuture<Integer> g = new CompletableFuture<>();
2317        final IncAction r = new IncAction();
2318        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2497          final CFException ex = new CFException();
2498 +        final NoopConsumer[] rs = new NoopConsumer[6];
2499 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2500  
2501 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2502 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2503 +        checkIncomplete(h0);
2504 +        checkIncomplete(h1);
2505 +        rs[0].assertNotInvoked();
2506 +        rs[1].assertNotInvoked();
2507          f.completeExceptionally(ex);
2508 <        checkCompletedWithWrappedCFException(h, ex);
2508 >        checkCompletedWithWrappedException(h0, ex);
2509 >        checkCompletedWithWrappedException(h1, ex);
2510 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2511 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2512 >        checkCompletedWithWrappedException(h2, ex);
2513 >        checkCompletedWithWrappedException(h3, ex);
2514 >
2515          g.complete(v1);
2516  
2517 <        assertEquals(0, r.invocationCount);
2517 >        // unspecified behavior - both source completions available
2518 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2519 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2520 >        try {
2521 >            assertNull(h4.join());
2522 >            rs[4].assertValue(v1);
2523 >        } catch (CompletionException ok) {
2524 >            checkCompletedWithWrappedException(h4, ex);
2525 >            rs[4].assertNotInvoked();
2526 >        }
2527 >        try {
2528 >            assertNull(h5.join());
2529 >            rs[5].assertValue(v1);
2530 >        } catch (CompletionException ok) {
2531 >            checkCompletedWithWrappedException(h5, ex);
2532 >            rs[5].assertNotInvoked();
2533 >        }
2534 >
2535 >        checkCompletedExceptionally(f, ex);
2536          checkCompletedNormally(g, v1);
2537 <        checkCompletedWithWrappedCFException(f, ex);
2538 <        checkCompletedWithWrappedCFException(h, ex);
2537 >        checkCompletedWithWrappedException(h0, ex);
2538 >        checkCompletedWithWrappedException(h1, ex);
2539 >        checkCompletedWithWrappedException(h2, ex);
2540 >        checkCompletedWithWrappedException(h3, ex);
2541 >        checkCompletedWithWrappedException(h4, ex);
2542 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2543      }}
2544  
2545      public void testAcceptEither_exceptionalCompletion2() {
2546          for (ExecutionMode m : ExecutionMode.values())
2547 +        for (boolean fFirst : new boolean[] { true, false })
2548          for (Integer v1 : new Integer[] { 1, null })
2549      {
2550          final CompletableFuture<Integer> f = new CompletableFuture<>();
2551          final CompletableFuture<Integer> g = new CompletableFuture<>();
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();
2552          final CFException ex = new CFException();
2553 +        final NoopConsumer[] rs = new NoopConsumer[6];
2554 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2555  
2556 <        g.completeExceptionally(ex);
2557 <        f.complete(v1);
2558 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2556 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2557 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2558 >        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2559 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2560 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2561 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2562  
2563 <        // unspecified behavior
2365 <        Integer v;
2563 >        // unspecified behavior - both source completions available
2564          try {
2565 <            assertNull(h.join());
2566 <            assertEquals(1, r.invocationCount);
2369 <            assertEquals(inc(v1), r.value);
2565 >            assertEquals(null, h0.join());
2566 >            rs[0].assertValue(v1);
2567          } catch (CompletionException ok) {
2568 <            checkCompletedWithWrappedCFException(h, ex);
2569 <            assertEquals(0, r.invocationCount);
2568 >            checkCompletedWithWrappedException(h0, ex);
2569 >            rs[0].assertNotInvoked();
2570          }
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;
2571          try {
2572 <            assertNull(h.join());
2573 <            assertEquals(1, r.invocationCount);
2397 <            assertEquals(inc(v1), r.value);
2572 >            assertEquals(null, h1.join());
2573 >            rs[1].assertValue(v1);
2574          } catch (CompletionException ok) {
2575 <            checkCompletedWithWrappedCFException(h, ex);
2576 <            assertEquals(0, r.invocationCount);
2575 >            checkCompletedWithWrappedException(h1, ex);
2576 >            rs[1].assertNotInvoked();
2577 >        }
2578 >        try {
2579 >            assertEquals(null, h2.join());
2580 >            rs[2].assertValue(v1);
2581 >        } catch (CompletionException ok) {
2582 >            checkCompletedWithWrappedException(h2, ex);
2583 >            rs[2].assertNotInvoked();
2584 >        }
2585 >        try {
2586 >            assertEquals(null, h3.join());
2587 >            rs[3].assertValue(v1);
2588 >        } catch (CompletionException ok) {
2589 >            checkCompletedWithWrappedException(h3, ex);
2590 >            rs[3].assertNotInvoked();
2591          }
2592  
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);
2593          checkCompletedNormally(f, v1);
2594 <        checkCompletedNormally(g, v2);
2594 >        checkCompletedExceptionally(g, ex);
2595      }}
2596  
2597      /**
2598       * acceptEither result completes exceptionally if either source cancelled
2599       */
2600 <    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() {
2600 >    public void testAcceptEither_sourceCancelled() {
2601          for (ExecutionMode m : ExecutionMode.values())
2602          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2603          for (Integer v1 : new Integer[] { 1, null })
2604      {
2605          final CompletableFuture<Integer> f = new CompletableFuture<>();
2606          final CompletableFuture<Integer> g = new CompletableFuture<>();
2607 <        final IncAction r = new IncAction();
2608 <        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2476 <
2477 <        assertTrue(g.cancel(mayInterruptIfRunning));
2478 <        checkCompletedWithWrappedCancellationException(h);
2479 <        f.complete(v1);
2607 >        final NoopConsumer[] rs = new NoopConsumer[6];
2608 >        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2609  
2610 <        checkCancelled(g);
2611 <        assertEquals(0, r.invocationCount);
2612 <        checkCompletedNormally(f, v1);
2613 <        checkCompletedWithWrappedCancellationException(h);
2614 <    }}
2610 >        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2611 >        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2612 >        checkIncomplete(h0);
2613 >        checkIncomplete(h1);
2614 >        rs[0].assertNotInvoked();
2615 >        rs[1].assertNotInvoked();
2616 >        f.cancel(mayInterruptIfRunning);
2617 >        checkCompletedWithWrappedCancellationException(h0);
2618 >        checkCompletedWithWrappedCancellationException(h1);
2619 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2620 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2621 >        checkCompletedWithWrappedCancellationException(h2);
2622 >        checkCompletedWithWrappedCancellationException(h3);
2623  
2624 <    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);
2624 >        g.complete(v1);
2625  
2626 <        // unspecified behavior
2627 <        Integer v;
2626 >        // unspecified behavior - both source completions available
2627 >        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2628 >        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2629          try {
2630 <            assertNull(h.join());
2631 <            assertEquals(1, r.invocationCount);
2505 <            assertEquals(inc(v1), r.value);
2630 >            assertNull(h4.join());
2631 >            rs[4].assertValue(v1);
2632          } catch (CompletionException ok) {
2633 <            checkCompletedWithWrappedCancellationException(h);
2634 <            assertEquals(0, r.invocationCount);
2633 >            checkCompletedWithWrappedCancellationException(h4);
2634 >            rs[4].assertNotInvoked();
2635          }
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;
2636          try {
2637 <            assertNull(h.join());
2638 <            assertEquals(1, r.invocationCount);
2533 <            assertEquals(inc(v1), r.value);
2637 >            assertNull(h5.join());
2638 >            rs[5].assertValue(v1);
2639          } catch (CompletionException ok) {
2640 <            checkCompletedWithWrappedCancellationException(h);
2641 <            assertEquals(0, r.invocationCount);
2640 >            checkCompletedWithWrappedCancellationException(h5);
2641 >            rs[5].assertNotInvoked();
2642          }
2643  
2644          checkCancelled(f);
2645          checkCompletedNormally(g, v1);
2646 +        checkCompletedWithWrappedCancellationException(h0);
2647 +        checkCompletedWithWrappedCancellationException(h1);
2648 +        checkCompletedWithWrappedCancellationException(h2);
2649 +        checkCompletedWithWrappedCancellationException(h3);
2650 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2651      }}
2652  
2653      /**
2654 <     * runAfterEither result completes normally after normal completion
2545 <     * of either source
2654 >     * acceptEither result completes exceptionally if action does
2655       */
2656 <    public void testRunAfterEither_normalCompletion1() {
2656 >    public void testAcceptEither_actionFailed() {
2657          for (ExecutionMode m : ExecutionMode.values())
2658          for (Integer v1 : new Integer[] { 1, null })
2659          for (Integer v2 : new Integer[] { 2, null })
2660      {
2661          final CompletableFuture<Integer> f = new CompletableFuture<>();
2662          final CompletableFuture<Integer> g = new CompletableFuture<>();
2663 <        final Noop r = new Noop();
2664 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2663 >        final FailingConsumer[] rs = new FailingConsumer[6];
2664 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
2665  
2666 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2667 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2668          f.complete(v1);
2669 <        checkCompletedNormally(h, null);
2670 <        assertEquals(1, r.invocationCount);
2669 >        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2670 >        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2671 >        checkCompletedWithWrappedException(h0, rs[0].ex);
2672 >        checkCompletedWithWrappedException(h1, rs[1].ex);
2673 >        checkCompletedWithWrappedException(h2, rs[2].ex);
2674 >        checkCompletedWithWrappedException(h3, rs[3].ex);
2675 >        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2676 >
2677          g.complete(v2);
2678  
2679 +        // unspecified behavior - both source completions available
2680 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2681 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2682 +
2683 +        checkCompletedWithWrappedException(h4, rs[4].ex);
2684 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2685 +                   Objects.equals(v2, rs[4].value));
2686 +        checkCompletedWithWrappedException(h5, rs[5].ex);
2687 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2688 +                   Objects.equals(v2, rs[5].value));
2689 +
2690          checkCompletedNormally(f, v1);
2691          checkCompletedNormally(g, v2);
2564        checkCompletedNormally(h, null);
2565        assertEquals(1, r.invocationCount);
2692      }}
2693  
2694 <    public void testRunAfterEither_normalCompletion2() {
2694 >    /**
2695 >     * runAfterEither result completes normally after normal completion
2696 >     * of either source
2697 >     */
2698 >    public void testRunAfterEither_normalCompletion() {
2699          for (ExecutionMode m : ExecutionMode.values())
2700          for (Integer v1 : new Integer[] { 1, null })
2701          for (Integer v2 : new Integer[] { 2, null })
2702 +        for (boolean pushNop : new boolean[] { true, false })
2703      {
2704          final CompletableFuture<Integer> f = new CompletableFuture<>();
2705          final CompletableFuture<Integer> g = new CompletableFuture<>();
2706 <        final Noop r = new Noop();
2707 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2706 >        final Noop[] rs = new Noop[6];
2707 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2708  
2709 <        g.complete(v2);
2710 <        checkCompletedNormally(h, null);
2711 <        assertEquals(1, r.invocationCount);
2709 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2710 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2711 >        checkIncomplete(h0);
2712 >        checkIncomplete(h1);
2713 >        rs[0].assertNotInvoked();
2714 >        rs[1].assertNotInvoked();
2715 >        if (pushNop) {          // ad hoc test of intra-completion interference
2716 >            m.thenRun(f, () -> {});
2717 >            m.thenRun(g, () -> {});
2718 >        }
2719          f.complete(v1);
2720 +        checkCompletedNormally(h0, null);
2721 +        checkCompletedNormally(h1, null);
2722 +        rs[0].assertInvoked();
2723 +        rs[1].assertInvoked();
2724 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2725 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2726 +        checkCompletedNormally(h2, null);
2727 +        checkCompletedNormally(h3, null);
2728 +        rs[2].assertInvoked();
2729 +        rs[3].assertInvoked();
2730  
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);
2731          g.complete(v2);
2600        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2732  
2733 <        checkCompletedNormally(h, null);
2733 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2734 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2735 >
2736          checkCompletedNormally(f, v1);
2737          checkCompletedNormally(g, v2);
2738 <        assertEquals(1, r.invocationCount);
2738 >        checkCompletedNormally(h0, null);
2739 >        checkCompletedNormally(h1, null);
2740 >        checkCompletedNormally(h2, null);
2741 >        checkCompletedNormally(h3, null);
2742 >        checkCompletedNormally(h4, null);
2743 >        checkCompletedNormally(h5, null);
2744 >        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2745      }}
2746  
2747      /**
2748       * runAfterEither result completes exceptionally after exceptional
2749       * completion of either source
2750       */
2751 <    public void testRunAfterEither_exceptionalCompletion1() {
2751 >    public void testRunAfterEither_exceptionalCompletion() {
2752          for (ExecutionMode m : ExecutionMode.values())
2753          for (Integer v1 : new Integer[] { 1, null })
2754      {
2755          final CompletableFuture<Integer> f = new CompletableFuture<>();
2756          final CompletableFuture<Integer> g = new CompletableFuture<>();
2618        final Noop r = new Noop();
2619        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2757          final CFException ex = new CFException();
2758 +        final Noop[] rs = new Noop[6];
2759 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2760  
2761 <        f.completeExceptionally(ex);
2762 <        checkCompletedWithWrappedCFException(h, ex);
2763 <        g.complete(v1);
2761 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2762 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2763 >        checkIncomplete(h0);
2764 >        checkIncomplete(h1);
2765 >        rs[0].assertNotInvoked();
2766 >        rs[1].assertNotInvoked();
2767 >        assertTrue(f.completeExceptionally(ex));
2768 >        checkCompletedWithWrappedException(h0, ex);
2769 >        checkCompletedWithWrappedException(h1, ex);
2770 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2771 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2772 >        checkCompletedWithWrappedException(h2, ex);
2773 >        checkCompletedWithWrappedException(h3, ex);
2774 >
2775 >        assertTrue(g.complete(v1));
2776 >
2777 >        // unspecified behavior - both source completions available
2778 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2779 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2780 >        try {
2781 >            assertNull(h4.join());
2782 >            rs[4].assertInvoked();
2783 >        } catch (CompletionException ok) {
2784 >            checkCompletedWithWrappedException(h4, ex);
2785 >            rs[4].assertNotInvoked();
2786 >        }
2787 >        try {
2788 >            assertNull(h5.join());
2789 >            rs[5].assertInvoked();
2790 >        } catch (CompletionException ok) {
2791 >            checkCompletedWithWrappedException(h5, ex);
2792 >            rs[5].assertNotInvoked();
2793 >        }
2794  
2795 <        assertEquals(0, r.invocationCount);
2795 >        checkCompletedExceptionally(f, ex);
2796          checkCompletedNormally(g, v1);
2797 <        checkCompletedWithWrappedCFException(f, ex);
2798 <        checkCompletedWithWrappedCFException(h, ex);
2797 >        checkCompletedWithWrappedException(h0, ex);
2798 >        checkCompletedWithWrappedException(h1, ex);
2799 >        checkCompletedWithWrappedException(h2, ex);
2800 >        checkCompletedWithWrappedException(h3, ex);
2801 >        checkCompletedWithWrappedException(h4, ex);
2802 >        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2803      }}
2804  
2805      public void testRunAfterEither_exceptionalCompletion2() {
2806          for (ExecutionMode m : ExecutionMode.values())
2807 +        for (boolean fFirst : new boolean[] { true, false })
2808          for (Integer v1 : new Integer[] { 1, null })
2809      {
2810          final CompletableFuture<Integer> f = new CompletableFuture<>();
2811          final CompletableFuture<Integer> g = new CompletableFuture<>();
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();
2812          final CFException ex = new CFException();
2813 +        final Noop[] rs = new Noop[6];
2814 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2815  
2816 <        g.completeExceptionally(ex);
2817 <        f.complete(v1);
2818 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2816 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2817 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2818 >        assertTrue( fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2819 >        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2820 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2821 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2822  
2823 <        // unspecified behavior
2666 <        Integer v;
2823 >        // unspecified behavior - both source completions available
2824          try {
2825 <            assertNull(h.join());
2826 <            assertEquals(1, r.invocationCount);
2825 >            assertEquals(null, h0.join());
2826 >            rs[0].assertInvoked();
2827          } catch (CompletionException ok) {
2828 <            checkCompletedWithWrappedCFException(h, ex);
2829 <            assertEquals(0, r.invocationCount);
2828 >            checkCompletedWithWrappedException(h0, ex);
2829 >            rs[0].assertNotInvoked();
2830          }
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;
2831          try {
2832 <            assertNull(h.join());
2833 <            assertEquals(1, r.invocationCount);
2832 >            assertEquals(null, h1.join());
2833 >            rs[1].assertInvoked();
2834          } catch (CompletionException ok) {
2835 <            checkCompletedWithWrappedCFException(h, ex);
2836 <            assertEquals(0, r.invocationCount);
2835 >            checkCompletedWithWrappedException(h1, ex);
2836 >            rs[1].assertNotInvoked();
2837 >        }
2838 >        try {
2839 >            assertEquals(null, h2.join());
2840 >            rs[2].assertInvoked();
2841 >        } catch (CompletionException ok) {
2842 >            checkCompletedWithWrappedException(h2, ex);
2843 >            rs[2].assertNotInvoked();
2844 >        }
2845 >        try {
2846 >            assertEquals(null, h3.join());
2847 >            rs[3].assertInvoked();
2848 >        } catch (CompletionException ok) {
2849 >            checkCompletedWithWrappedException(h3, ex);
2850 >            rs[3].assertNotInvoked();
2851          }
2852  
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);
2853          checkCompletedNormally(f, v1);
2854 <        checkCompletedNormally(g, v2);
2854 >        checkCompletedExceptionally(g, ex);
2855      }}
2856  
2857      /**
2858       * runAfterEither result completes exceptionally if either source cancelled
2859       */
2860 <    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() {
2767 <        for (ExecutionMode m : ExecutionMode.values())
2768 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2769 <        for (Integer v1 : new Integer[] { 1, null })
2770 <    {
2771 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
2772 <        final CompletableFuture<Integer> g = new CompletableFuture<>();
2773 <        final Noop r = new Noop();
2774 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2775 <
2776 <        assertTrue(g.cancel(mayInterruptIfRunning));
2777 <        checkCompletedWithWrappedCancellationException(h);
2778 <        f.complete(v1);
2779 <
2780 <        checkCancelled(g);
2781 <        assertEquals(0, r.invocationCount);
2782 <        checkCompletedNormally(f, v1);
2783 <        checkCompletedWithWrappedCancellationException(h);
2784 <    }}
2785 <
2786 <    public void testRunAfterEither_sourceCancelled3() {
2860 >    public void testRunAfterEither_sourceCancelled() {
2861          for (ExecutionMode m : ExecutionMode.values())
2862          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2863          for (Integer v1 : new Integer[] { 1, null })
2864      {
2865          final CompletableFuture<Integer> f = new CompletableFuture<>();
2866          final CompletableFuture<Integer> g = new CompletableFuture<>();
2867 <        final Noop r = new Noop();
2868 <
2795 <        assertTrue(g.cancel(mayInterruptIfRunning));
2796 <        f.complete(v1);
2797 <        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2867 >        final Noop[] rs = new Noop[6];
2868 >        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2869  
2870 <        // unspecified behavior
2871 <        Integer v;
2870 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2871 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2872 >        checkIncomplete(h0);
2873 >        checkIncomplete(h1);
2874 >        rs[0].assertNotInvoked();
2875 >        rs[1].assertNotInvoked();
2876 >        f.cancel(mayInterruptIfRunning);
2877 >        checkCompletedWithWrappedCancellationException(h0);
2878 >        checkCompletedWithWrappedCancellationException(h1);
2879 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2880 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2881 >        checkCompletedWithWrappedCancellationException(h2);
2882 >        checkCompletedWithWrappedCancellationException(h3);
2883 >
2884 >        assertTrue(g.complete(v1));
2885 >
2886 >        // unspecified behavior - both source completions available
2887 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2888 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2889          try {
2890 <            assertNull(h.join());
2891 <            assertEquals(1, r.invocationCount);
2890 >            assertNull(h4.join());
2891 >            rs[4].assertInvoked();
2892          } catch (CompletionException ok) {
2893 <            checkCompletedWithWrappedCancellationException(h);
2894 <            assertEquals(0, r.invocationCount);
2893 >            checkCompletedWithWrappedCancellationException(h4);
2894 >            rs[4].assertNotInvoked();
2895          }
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;
2896          try {
2897 <            assertNull(h.join());
2898 <            assertEquals(1, r.invocationCount);
2897 >            assertNull(h5.join());
2898 >            rs[5].assertInvoked();
2899          } catch (CompletionException ok) {
2900 <            checkCompletedWithWrappedCancellationException(h);
2901 <            assertEquals(0, r.invocationCount);
2900 >            checkCompletedWithWrappedCancellationException(h5);
2901 >            rs[5].assertNotInvoked();
2902          }
2903  
2904          checkCancelled(f);
2905          checkCompletedNormally(g, v1);
2906 +        checkCompletedWithWrappedCancellationException(h0);
2907 +        checkCompletedWithWrappedCancellationException(h1);
2908 +        checkCompletedWithWrappedCancellationException(h2);
2909 +        checkCompletedWithWrappedCancellationException(h3);
2910 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2911      }}
2912  
2913      /**
2914 <     * thenCompose result completes normally after normal completion of source
2914 >     * runAfterEither result completes exceptionally if action does
2915       */
2916 <    public void testThenCompose_normalCompletion1() {
2916 >    public void testRunAfterEither_actionFailed() {
2917          for (ExecutionMode m : ExecutionMode.values())
2918          for (Integer v1 : new Integer[] { 1, null })
2919 +        for (Integer v2 : new Integer[] { 2, null })
2920      {
2921          final CompletableFuture<Integer> f = new CompletableFuture<>();
2922 <        final CompletableFutureInc r = new CompletableFutureInc();
2923 <        final CompletableFuture<Integer> g = f.thenCompose(r);
2924 <        f.complete(v1);
2925 <        checkCompletedNormally(g, inc(v1));
2922 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
2923 >        final FailingRunnable[] rs = new FailingRunnable[6];
2924 >        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
2925 >
2926 >        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2927 >        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2928 >        assertTrue(f.complete(v1));
2929 >        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2930 >        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2931 >        checkCompletedWithWrappedException(h0, rs[0].ex);
2932 >        checkCompletedWithWrappedException(h1, rs[1].ex);
2933 >        checkCompletedWithWrappedException(h2, rs[2].ex);
2934 >        checkCompletedWithWrappedException(h3, rs[3].ex);
2935 >        for (int i = 0; i < 4; i++) rs[i].assertInvoked();
2936 >        assertTrue(g.complete(v2));
2937 >        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2938 >        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2939 >        checkCompletedWithWrappedException(h4, rs[4].ex);
2940 >        checkCompletedWithWrappedException(h5, rs[5].ex);
2941 >
2942          checkCompletedNormally(f, v1);
2943 <        assertEquals(1, r.invocationCount);
2943 >        checkCompletedNormally(g, v2);
2944 >        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2945      }}
2946  
2947 <    public void testThenCompose_normalCompletion2() {
2947 >    /**
2948 >     * thenCompose result completes normally after normal completion of source
2949 >     */
2950 >    public void testThenCompose_normalCompletion() {
2951          for (ExecutionMode m : ExecutionMode.values())
2952 +        for (boolean createIncomplete : new boolean[] { true, false })
2953          for (Integer v1 : new Integer[] { 1, null })
2954      {
2955          final CompletableFuture<Integer> f = new CompletableFuture<>();
2956 <        final CompletableFutureInc r = new CompletableFutureInc();
2957 <        f.complete(v1);
2958 <        final CompletableFuture<Integer> g = f.thenCompose(r);
2956 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2957 >        if (!createIncomplete) assertTrue(f.complete(v1));
2958 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2959 >        if (createIncomplete) assertTrue(f.complete(v1));
2960 >
2961          checkCompletedNormally(g, inc(v1));
2962          checkCompletedNormally(f, v1);
2963 <        assertEquals(1, r.invocationCount);
2963 >        r.assertValue(v1);
2964      }}
2965  
2966      /**
2967       * thenCompose result completes exceptionally after exceptional
2968       * completion of source
2969       */
2970 <    public void testThenCompose_exceptionalCompletion1() {
2970 >    public void testThenCompose_exceptionalCompletion() {
2971          for (ExecutionMode m : ExecutionMode.values())
2972 +        for (boolean createIncomplete : new boolean[] { true, false })
2973      {
2974          final CFException ex = new CFException();
2975 <        final CompletableFutureInc r = new CompletableFutureInc();
2975 >        final CompletableFutureInc r = new CompletableFutureInc(m);
2976          final CompletableFuture<Integer> f = new CompletableFuture<>();
2977 <        final CompletableFuture<Integer> g = f.thenCompose(r);
2978 <        f.completeExceptionally(ex);
2979 <        checkCompletedWithWrappedCFException(g, ex);
2882 <        checkCompletedWithWrappedCFException(f, ex);
2883 <    }}
2977 >        if (!createIncomplete) f.completeExceptionally(ex);
2978 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2979 >        if (createIncomplete) f.completeExceptionally(ex);
2980  
2981 <    public void testThenCompose_exceptionalCompletion2() {
2982 <        for (ExecutionMode m : ExecutionMode.values())
2983 <    {
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);
2981 >        checkCompletedWithWrappedException(g, ex);
2982 >        checkCompletedExceptionally(f, ex);
2983 >        r.assertNotInvoked();
2984      }}
2985  
2986      /**
2987       * thenCompose result completes exceptionally if action does
2988       */
2989 <    public void testThenCompose_actionFailed1() {
2989 >    public void testThenCompose_actionFailed() {
2990          for (ExecutionMode m : ExecutionMode.values())
2991 +        for (boolean createIncomplete : new boolean[] { true, false })
2992          for (Integer v1 : new Integer[] { 1, null })
2993      {
2994          final CompletableFuture<Integer> f = new CompletableFuture<>();
2995          final FailingCompletableFutureFunction r
2996 <            = new FailingCompletableFutureFunction();
2997 <        final CompletableFuture<Integer> g = f.thenCompose(r);
2998 <        f.complete(v1);
2999 <        checkCompletedWithWrappedCFException(g);
2910 <        checkCompletedNormally(f, v1);
2911 <    }}
2996 >            = new FailingCompletableFutureFunction(m);
2997 >        if (!createIncomplete) assertTrue(f.complete(v1));
2998 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2999 >        if (createIncomplete) assertTrue(f.complete(v1));
3000  
3001 <    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);
3001 >        checkCompletedWithWrappedException(g, r.ex);
3002          checkCompletedNormally(f, v1);
3003      }}
3004  
3005      /**
3006       * thenCompose result completes exceptionally if source cancelled
3007       */
3008 <    public void testThenCompose_sourceCancelled1() {
3008 >    public void testThenCompose_sourceCancelled() {
3009          for (ExecutionMode m : ExecutionMode.values())
3010 +        for (boolean createIncomplete : new boolean[] { true, false })
3011          for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3012      {
3013          final CompletableFuture<Integer> f = new CompletableFuture<>();
3014 <        final CompletableFutureInc r = new CompletableFutureInc();
3015 <        final CompletableFuture<Integer> g = f.thenCompose(r);
3016 <        assertTrue(f.cancel(mayInterruptIfRunning));
3017 <        checkCompletedWithWrappedCancellationException(g);
3018 <        checkCancelled(f);
3019 <    }}
3014 >        final CompletableFutureInc r = new CompletableFutureInc(m);
3015 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
3016 >        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3017 >        if (createIncomplete) {
3018 >            checkIncomplete(g);
3019 >            assertTrue(f.cancel(mayInterruptIfRunning));
3020 >        }
3021  
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);
3022          checkCompletedWithWrappedCancellationException(g);
3023          checkCancelled(f);
3024      }}
3025  
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
3213    /**
3214     * 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
3026      /**
3027 <     * thenAcceptAsync result completes exceptionally if action does
3027 >     * thenCompose result completes exceptionally if the result of the action does
3028       */
3029 <    public void testThenAcceptAsync3E() {
3030 <        CompletableFuture<Integer> f = new CompletableFuture<>();
3031 <        FailingConsumer r = new FailingConsumer();
3032 <        CompletableFuture<Void> g = f.thenAcceptAsync(r, new ThreadExecutor());
3033 <        f.complete(null);
3034 <        checkCompletedWithWrappedCFException(g);
3035 <    }
3029 >    public void testThenCompose_actionReturnsFailingFuture() {
3030 >        for (ExecutionMode m : ExecutionMode.values())
3031 >        for (int order = 0; order < 6; order++)
3032 >        for (Integer v1 : new Integer[] { 1, null })
3033 >    {
3034 >        final CFException ex = new CFException();
3035 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
3036 >        final CompletableFuture<Integer> g = new CompletableFuture<>();
3037 >        final CompletableFuture<Integer> h;
3038 >        // Test all permutations of orders
3039 >        switch (order) {
3040 >        case 0:
3041 >            assertTrue(f.complete(v1));
3042 >            assertTrue(g.completeExceptionally(ex));
3043 >            h = m.thenCompose(f, (x -> g));
3044 >            break;
3045 >        case 1:
3046 >            assertTrue(f.complete(v1));
3047 >            h = m.thenCompose(f, (x -> g));
3048 >            assertTrue(g.completeExceptionally(ex));
3049 >            break;
3050 >        case 2:
3051 >            assertTrue(g.completeExceptionally(ex));
3052 >            assertTrue(f.complete(v1));
3053 >            h = m.thenCompose(f, (x -> g));
3054 >            break;
3055 >        case 3:
3056 >            assertTrue(g.completeExceptionally(ex));
3057 >            h = m.thenCompose(f, (x -> g));
3058 >            assertTrue(f.complete(v1));
3059 >            break;
3060 >        case 4:
3061 >            h = m.thenCompose(f, (x -> g));
3062 >            assertTrue(f.complete(v1));
3063 >            assertTrue(g.completeExceptionally(ex));
3064 >            break;
3065 >        case 5:
3066 >            h = m.thenCompose(f, (x -> g));
3067 >            assertTrue(f.complete(v1));
3068 >            assertTrue(g.completeExceptionally(ex));
3069 >            break;
3070 >        default: throw new AssertionError();
3071 >        }
3072  
3073 <    /**
3074 <     * thenAcceptAsync result completes exceptionally if source cancelled
3075 <     */
3076 <    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 <    }
3073 >        checkCompletedExceptionally(g, ex);
3074 >        checkCompletedWithWrappedException(h, ex);
3075 >        checkCompletedNormally(f, v1);
3076 >    }}
3077  
3078      // other static methods
3079  
# Line 3260 | Line 3091 | public class CompletableFutureTest exten
3091       * when all components complete normally
3092       */
3093      public void testAllOf_normal() throws Exception {
3094 <        for (int k = 1; k < 20; ++k) {
3095 <            CompletableFuture<Integer>[] fs = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3096 <            for (int i = 0; i < k; ++i)
3094 >        for (int k = 1; k < 10; k++) {
3095 >            CompletableFuture<Integer>[] fs
3096 >                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3097 >            for (int i = 0; i < k; i++)
3098 >                fs[i] = new CompletableFuture<>();
3099 >            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3100 >            for (int i = 0; i < k; i++) {
3101 >                checkIncomplete(f);
3102 >                checkIncomplete(CompletableFuture.allOf(fs));
3103 >                fs[i].complete(one);
3104 >            }
3105 >            checkCompletedNormally(f, null);
3106 >            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3107 >        }
3108 >    }
3109 >
3110 >    public void testAllOf_normal_backwards() throws Exception {
3111 >        for (int k = 1; k < 10; k++) {
3112 >            CompletableFuture<Integer>[] fs
3113 >                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3114 >            for (int i = 0; i < k; i++)
3115                  fs[i] = new CompletableFuture<>();
3116              CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3117 <            for (int i = 0; i < k; ++i) {
3117 >            for (int i = k - 1; i >= 0; i--) {
3118                  checkIncomplete(f);
3119                  checkIncomplete(CompletableFuture.allOf(fs));
3120                  fs[i].complete(one);
# Line 3275 | Line 3124 | public class CompletableFutureTest exten
3124          }
3125      }
3126  
3127 +    public void testAllOf_exceptional() throws Exception {
3128 +        for (int k = 1; k < 10; k++) {
3129 +            CompletableFuture<Integer>[] fs
3130 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3131 +            CFException ex = new CFException();
3132 +            for (int i = 0; i < k; i++)
3133 +                fs[i] = new CompletableFuture<>();
3134 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3135 +            for (int i = 0; i < k; i++) {
3136 +                checkIncomplete(f);
3137 +                checkIncomplete(CompletableFuture.allOf(fs));
3138 +                if (i != k / 2) {
3139 +                    fs[i].complete(i);
3140 +                    checkCompletedNormally(fs[i], i);
3141 +                } else {
3142 +                    fs[i].completeExceptionally(ex);
3143 +                    checkCompletedExceptionally(fs[i], ex);
3144 +                }
3145 +            }
3146 +            checkCompletedWithWrappedException(f, ex);
3147 +            checkCompletedWithWrappedException(CompletableFuture.allOf(fs), ex);
3148 +        }
3149 +    }
3150 +
3151      /**
3152       * anyOf(no component futures) returns an incomplete future
3153       */
3154      public void testAnyOf_empty() throws Exception {
3155 +        for (Integer v1 : new Integer[] { 1, null })
3156 +    {
3157          CompletableFuture<Object> f = CompletableFuture.anyOf();
3158          checkIncomplete(f);
3159 <    }
3159 >
3160 >        f.complete(v1);
3161 >        checkCompletedNormally(f, v1);
3162 >    }}
3163  
3164      /**
3165       * anyOf returns a future completed normally with a value when
3166       * a component future does
3167       */
3168      public void testAnyOf_normal() throws Exception {
3169 <        for (int k = 0; k < 10; ++k) {
3169 >        for (int k = 0; k < 10; k++) {
3170              CompletableFuture[] fs = new CompletableFuture[k];
3171 <            for (int i = 0; i < k; ++i)
3171 >            for (int i = 0; i < k; i++)
3172                  fs[i] = new CompletableFuture<>();
3173              CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3174              checkIncomplete(f);
3175 <            for (int i = 0; i < k; ++i) {
3176 <                fs[i].complete(one);
3177 <                checkCompletedNormally(f, one);
3178 <                checkCompletedNormally(CompletableFuture.anyOf(fs), one);
3175 >            for (int i = 0; i < k; i++) {
3176 >                fs[i].complete(i);
3177 >                checkCompletedNormally(f, 0);
3178 >                int x = (int) CompletableFuture.anyOf(fs).join();
3179 >                assertTrue(0 <= x && x <= i);
3180 >            }
3181 >        }
3182 >    }
3183 >    public void testAnyOf_normal_backwards() throws Exception {
3184 >        for (int k = 0; k < 10; k++) {
3185 >            CompletableFuture[] fs = new CompletableFuture[k];
3186 >            for (int i = 0; i < k; i++)
3187 >                fs[i] = new CompletableFuture<>();
3188 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3189 >            checkIncomplete(f);
3190 >            for (int i = k - 1; i >= 0; i--) {
3191 >                fs[i].complete(i);
3192 >                checkCompletedNormally(f, k - 1);
3193 >                int x = (int) CompletableFuture.anyOf(fs).join();
3194 >                assertTrue(i <= x && x <= k - 1);
3195              }
3196          }
3197      }
# Line 3306 | Line 3200 | public class CompletableFutureTest exten
3200       * anyOf result completes exceptionally when any component does.
3201       */
3202      public void testAnyOf_exceptional() throws Exception {
3203 <        for (int k = 0; k < 10; ++k) {
3203 >        for (int k = 0; k < 10; k++) {
3204 >            CompletableFuture[] fs = new CompletableFuture[k];
3205 >            CFException[] exs = new CFException[k];
3206 >            for (int i = 0; i < k; i++) {
3207 >                fs[i] = new CompletableFuture<>();
3208 >                exs[i] = new CFException();
3209 >            }
3210 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3211 >            checkIncomplete(f);
3212 >            for (int i = 0; i < k; i++) {
3213 >                fs[i].completeExceptionally(exs[i]);
3214 >                checkCompletedWithWrappedException(f, exs[0]);
3215 >                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3216 >            }
3217 >        }
3218 >    }
3219 >
3220 >    public void testAnyOf_exceptional_backwards() throws Exception {
3221 >        for (int k = 0; k < 10; k++) {
3222              CompletableFuture[] fs = new CompletableFuture[k];
3223 <            for (int i = 0; i < k; ++i)
3223 >            CFException[] exs = new CFException[k];
3224 >            for (int i = 0; i < k; i++) {
3225                  fs[i] = new CompletableFuture<>();
3226 +                exs[i] = new CFException();
3227 +            }
3228              CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3229              checkIncomplete(f);
3230 <            for (int i = 0; i < k; ++i) {
3231 <                fs[i].completeExceptionally(new CFException());
3232 <                checkCompletedWithWrappedCFException(f);
3230 >            for (int i = k - 1; i >= 0; i--) {
3231 >                fs[i].completeExceptionally(exs[i]);
3232 >                checkCompletedWithWrappedException(f, exs[k - 1]);
3233                  checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3234              }
3235          }
# Line 3327 | Line 3242 | public class CompletableFutureTest exten
3242          CompletableFuture<Integer> f = new CompletableFuture<>();
3243          CompletableFuture<Integer> g = new CompletableFuture<>();
3244          CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
3330        CompletableFuture<?> h;
3245          ThreadExecutor exec = new ThreadExecutor();
3246  
3247          Runnable[] throwingActions = {
3248              () -> CompletableFuture.supplyAsync(null),
3249              () -> CompletableFuture.supplyAsync(null, exec),
3250 <            () -> CompletableFuture.supplyAsync(supplyOne, null),
3250 >            () -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.SYNC, 42), null),
3251  
3252              () -> CompletableFuture.runAsync(null),
3253              () -> CompletableFuture.runAsync(null, exec),
# Line 3343 | Line 3257 | public class CompletableFutureTest exten
3257  
3258              () -> f.thenApply(null),
3259              () -> f.thenApplyAsync(null),
3260 <            () -> f.thenApplyAsync((x) -> x, null),
3260 >            () -> f.thenApplyAsync(x -> x, null),
3261              () -> f.thenApplyAsync(null, exec),
3262  
3263              () -> f.thenAccept(null),
3264              () -> f.thenAcceptAsync(null),
3265 <            () -> f.thenAcceptAsync((x) -> {} , null),
3265 >            () -> f.thenAcceptAsync(x -> {} , null),
3266              () -> f.thenAcceptAsync(null, exec),
3267  
3268              () -> f.thenRun(null),
# Line 3383 | Line 3297 | public class CompletableFutureTest exten
3297              () -> f.applyToEither(g, null),
3298              () -> f.applyToEitherAsync(g, null),
3299              () -> f.applyToEitherAsync(g, null, exec),
3300 <            () -> f.applyToEither(nullFuture, (x) -> x),
3301 <            () -> f.applyToEitherAsync(nullFuture, (x) -> x),
3302 <            () -> f.applyToEitherAsync(nullFuture, (x) -> x, exec),
3303 <            () -> f.applyToEitherAsync(g, (x) -> x, null),
3300 >            () -> f.applyToEither(nullFuture, x -> x),
3301 >            () -> f.applyToEitherAsync(nullFuture, x -> x),
3302 >            () -> f.applyToEitherAsync(nullFuture, x -> x, exec),
3303 >            () -> f.applyToEitherAsync(g, x -> x, null),
3304  
3305              () -> f.acceptEither(g, null),
3306              () -> f.acceptEitherAsync(g, null),
3307              () -> f.acceptEitherAsync(g, null, exec),
3308 <            () -> f.acceptEither(nullFuture, (x) -> {}),
3309 <            () -> f.acceptEitherAsync(nullFuture, (x) -> {}),
3310 <            () -> f.acceptEitherAsync(nullFuture, (x) -> {}, exec),
3311 <            () -> f.acceptEitherAsync(g, (x) -> {}, null),
3308 >            () -> f.acceptEither(nullFuture, x -> {}),
3309 >            () -> f.acceptEitherAsync(nullFuture, x -> {}),
3310 >            () -> f.acceptEitherAsync(nullFuture, x -> {}, exec),
3311 >            () -> f.acceptEitherAsync(g, x -> {}, null),
3312  
3313              () -> f.runAfterEither(g, null),
3314              () -> f.runAfterEitherAsync(g, null),
# Line 3406 | Line 3320 | public class CompletableFutureTest exten
3320  
3321              () -> f.thenCompose(null),
3322              () -> f.thenComposeAsync(null),
3323 <            () -> f.thenComposeAsync(new CompletableFutureInc(), null),
3323 >            () -> f.thenComposeAsync(new CompletableFutureInc(ExecutionMode.EXECUTOR), null),
3324              () -> f.thenComposeAsync(null, exec),
3325  
3326              () -> f.exceptionally(null),
# Line 3424 | Line 3338 | public class CompletableFutureTest exten
3338              () -> CompletableFuture.anyOf(null, f),
3339  
3340              () -> f.obtrudeException(null),
3341 +
3342 +            () -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3343 +            () -> CompletableFuture.delayedExecutor(1L, null, exec),
3344 +            () -> CompletableFuture.delayedExecutor(1L, null),
3345 +
3346 +            () -> f.orTimeout(1L, null),
3347 +            () -> f.completeOnTimeout(42, 1L, null),
3348 +
3349 +            () -> CompletableFuture.failedFuture(null),
3350 +            () -> CompletableFuture.failedStage(null),
3351          };
3352  
3353          assertThrows(NullPointerException.class, throwingActions);
# Line 3431 | Line 3355 | public class CompletableFutureTest exten
3355      }
3356  
3357      /**
3358 +     * Test submissions to an executor that rejects all tasks.
3359 +     */
3360 +    public void testRejectingExecutor() {
3361 +        for (Integer v : new Integer[] { 1, null })
3362 +    {
3363 +        final CountingRejectingExecutor e = new CountingRejectingExecutor();
3364 +
3365 +        final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3366 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3367 +
3368 +        List<CompletableFuture<?>> futures = new ArrayList<>();
3369 +
3370 +        List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3371 +        srcs.add(complete);
3372 +        srcs.add(incomplete);
3373 +
3374 +        for (CompletableFuture<Integer> src : srcs) {
3375 +            List<CompletableFuture<?>> fs = new ArrayList<>();
3376 +            fs.add(src.thenRunAsync(() -> {}, e));
3377 +            fs.add(src.thenAcceptAsync(z -> {}, e));
3378 +            fs.add(src.thenApplyAsync(z -> z, e));
3379 +
3380 +            fs.add(src.thenCombineAsync(src, (x, y) -> x, e));
3381 +            fs.add(src.thenAcceptBothAsync(src, (x, y) -> {}, e));
3382 +            fs.add(src.runAfterBothAsync(src, () -> {}, e));
3383 +
3384 +            fs.add(src.applyToEitherAsync(src, z -> z, e));
3385 +            fs.add(src.acceptEitherAsync(src, z -> {}, e));
3386 +            fs.add(src.runAfterEitherAsync(src, () -> {}, e));
3387 +
3388 +            fs.add(src.thenComposeAsync(z -> null, e));
3389 +            fs.add(src.whenCompleteAsync((z, t) -> {}, e));
3390 +            fs.add(src.handleAsync((z, t) -> null, e));
3391 +
3392 +            for (CompletableFuture<?> future : fs) {
3393 +                if (src.isDone())
3394 +                    checkCompletedWithWrappedException(future, e.ex);
3395 +                else
3396 +                    checkIncomplete(future);
3397 +            }
3398 +            futures.addAll(fs);
3399 +        }
3400 +
3401 +        {
3402 +            List<CompletableFuture<?>> fs = new ArrayList<>();
3403 +
3404 +            fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3405 +            fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3406 +
3407 +            fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3408 +            fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3409 +
3410 +            fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3411 +            fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3412 +
3413 +            for (CompletableFuture<?> future : fs)
3414 +                checkIncomplete(future);
3415 +            futures.addAll(fs);
3416 +        }
3417 +
3418 +        {
3419 +            List<CompletableFuture<?>> fs = new ArrayList<>();
3420 +
3421 +            fs.add(complete.applyToEitherAsync(incomplete, z -> z, e));
3422 +            fs.add(incomplete.applyToEitherAsync(complete, z -> z, e));
3423 +
3424 +            fs.add(complete.acceptEitherAsync(incomplete, z -> {}, e));
3425 +            fs.add(incomplete.acceptEitherAsync(complete, z -> {}, e));
3426 +
3427 +            fs.add(complete.runAfterEitherAsync(incomplete, () -> {}, e));
3428 +            fs.add(incomplete.runAfterEitherAsync(complete, () -> {}, e));
3429 +
3430 +            for (CompletableFuture<?> future : fs)
3431 +                checkCompletedWithWrappedException(future, e.ex);
3432 +            futures.addAll(fs);
3433 +        }
3434 +
3435 +        incomplete.complete(v);
3436 +
3437 +        for (CompletableFuture<?> future : futures)
3438 +            checkCompletedWithWrappedException(future, e.ex);
3439 +
3440 +        assertEquals(futures.size(), e.count.get());
3441 +    }}
3442 +
3443 +    /**
3444 +     * Test submissions to an executor that rejects all tasks, but
3445 +     * should never be invoked because the dependent future is
3446 +     * explicitly completed.
3447 +     */
3448 +    public void testRejectingExecutorNeverInvoked() {
3449 +        for (Integer v : new Integer[] { 1, null })
3450 +    {
3451 +        final CountingRejectingExecutor e = new CountingRejectingExecutor();
3452 +
3453 +        final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3454 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3455 +
3456 +        List<CompletableFuture<?>> futures = new ArrayList<>();
3457 +
3458 +        List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3459 +        srcs.add(complete);
3460 +        srcs.add(incomplete);
3461 +
3462 +        List<CompletableFuture<?>> fs = new ArrayList<>();
3463 +        fs.add(incomplete.thenRunAsync(() -> {}, e));
3464 +        fs.add(incomplete.thenAcceptAsync(z -> {}, e));
3465 +        fs.add(incomplete.thenApplyAsync(z -> z, e));
3466 +
3467 +        fs.add(incomplete.thenCombineAsync(incomplete, (x, y) -> x, e));
3468 +        fs.add(incomplete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3469 +        fs.add(incomplete.runAfterBothAsync(incomplete, () -> {}, e));
3470 +
3471 +        fs.add(incomplete.applyToEitherAsync(incomplete, z -> z, e));
3472 +        fs.add(incomplete.acceptEitherAsync(incomplete, z -> {}, e));
3473 +        fs.add(incomplete.runAfterEitherAsync(incomplete, () -> {}, e));
3474 +
3475 +        fs.add(incomplete.thenComposeAsync(z -> null, e));
3476 +        fs.add(incomplete.whenCompleteAsync((z, t) -> {}, e));
3477 +        fs.add(incomplete.handleAsync((z, t) -> null, e));
3478 +
3479 +        fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3480 +        fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3481 +
3482 +        fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3483 +        fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3484 +
3485 +        fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3486 +        fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3487 +
3488 +        for (CompletableFuture<?> future : fs)
3489 +            checkIncomplete(future);
3490 +
3491 +        for (CompletableFuture<?> future : fs)
3492 +            future.complete(null);
3493 +
3494 +        incomplete.complete(v);
3495 +
3496 +        for (CompletableFuture<?> future : fs)
3497 +            checkCompletedNormally(future, null);
3498 +
3499 +        assertEquals(0, e.count.get());
3500 +    }}
3501 +
3502 +    /**
3503       * toCompletableFuture returns this CompletableFuture.
3504       */
3505      public void testToCompletableFuture() {
# Line 3438 | Line 3507 | public class CompletableFutureTest exten
3507          assertSame(f, f.toCompletableFuture());
3508      }
3509  
3510 +    // jdk9
3511 +
3512      /**
3513 <     * whenComplete action executes on normal completion, propagating
3443 <     * source result.
3513 >     * newIncompleteFuture returns an incomplete CompletableFuture
3514       */
3515 <    public void testWhenComplete_normalCompletion1() {
3516 <        for (ExecutionMode m : ExecutionMode.values())
3515 >    public void testNewIncompleteFuture() {
3516 >        for (Integer v1 : new Integer[] { 1, null })
3517 >    {
3518 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3519 >        CompletableFuture<Integer> g = f.newIncompleteFuture();
3520 >        checkIncomplete(f);
3521 >        checkIncomplete(g);
3522 >        f.complete(v1);
3523 >        checkCompletedNormally(f, v1);
3524 >        checkIncomplete(g);
3525 >        g.complete(v1);
3526 >        checkCompletedNormally(g, v1);
3527 >        assertSame(g.getClass(), CompletableFuture.class);
3528 >    }}
3529 >
3530 >    /**
3531 >     * completedStage returns a completed CompletionStage
3532 >     */
3533 >    public void testCompletedStage() {
3534 >        AtomicInteger x = new AtomicInteger(0);
3535 >        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3536 >        CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3537 >        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3538 >        assertEquals(x.get(), 1);
3539 >        assertNull(r.get());
3540 >    }
3541 >
3542 >    /**
3543 >     * defaultExecutor by default returns the commonPool if
3544 >     * it supports more than one thread.
3545 >     */
3546 >    public void testDefaultExecutor() {
3547 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3548 >        Executor e = f.defaultExecutor();
3549 >        Executor c = ForkJoinPool.commonPool();
3550 >        if (ForkJoinPool.getCommonPoolParallelism() > 1)
3551 >            assertSame(e, c);
3552 >        else
3553 >            assertNotSame(e, c);
3554 >    }
3555 >
3556 >    /**
3557 >     * failedFuture returns a CompletableFuture completed
3558 >     * exceptionally with the given Exception
3559 >     */
3560 >    public void testFailedFuture() {
3561 >        CFException ex = new CFException();
3562 >        CompletableFuture<Integer> f = CompletableFuture.failedFuture(ex);
3563 >        checkCompletedExceptionally(f, ex);
3564 >    }
3565 >
3566 >    /**
3567 >     * failedFuture(null) throws NPE
3568 >     */
3569 >    public void testFailedFuture_null() {
3570 >        try {
3571 >            CompletableFuture<Integer> f = CompletableFuture.failedFuture(null);
3572 >            shouldThrow();
3573 >        } catch (NullPointerException success) {}
3574 >    }
3575 >
3576 >    /**
3577 >     * copy returns a CompletableFuture that is completed normally,
3578 >     * with the same value, when source is.
3579 >     */
3580 >    public void testCopy_normalCompletion() {
3581          for (boolean createIncomplete : new boolean[] { true, false })
3582          for (Integer v1 : new Integer[] { 1, null })
3583      {
3584 <        final AtomicInteger a = new AtomicInteger(0);
3585 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
3586 <        if (!createIncomplete) f.complete(v1);
3587 <        final CompletableFuture<Integer> g = m.whenComplete
3588 <            (f,
3589 <             (Integer x, Throwable t) -> {
3590 <                threadAssertSame(x, v1);
3591 <                threadAssertNull(t);
3592 <                a.getAndIncrement();
3593 <            });
3594 <        if (createIncomplete) f.complete(v1);
3584 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3585 >        if (!createIncomplete) assertTrue(f.complete(v1));
3586 >        CompletableFuture<Integer> g = f.copy();
3587 >        if (createIncomplete) {
3588 >            checkIncomplete(f);
3589 >            checkIncomplete(g);
3590 >            assertTrue(f.complete(v1));
3591 >        }
3592 >        checkCompletedNormally(f, v1);
3593 >        checkCompletedNormally(g, v1);
3594 >    }}
3595  
3596 +    /**
3597 +     * copy returns a CompletableFuture that is completed exceptionally
3598 +     * when source is.
3599 +     */
3600 +    public void testCopy_exceptionalCompletion() {
3601 +        for (boolean createIncomplete : new boolean[] { true, false })
3602 +    {
3603 +        CFException ex = new CFException();
3604 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3605 +        if (!createIncomplete) f.completeExceptionally(ex);
3606 +        CompletableFuture<Integer> g = f.copy();
3607 +        if (createIncomplete) {
3608 +            checkIncomplete(f);
3609 +            checkIncomplete(g);
3610 +            f.completeExceptionally(ex);
3611 +        }
3612 +        checkCompletedExceptionally(f, ex);
3613 +        checkCompletedWithWrappedException(g, ex);
3614 +    }}
3615 +
3616 +    /**
3617 +     * Completion of a copy does not complete its source.
3618 +     */
3619 +    public void testCopy_oneWayPropagation() {
3620 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3621 +        assertTrue(f.copy().complete(1));
3622 +        assertTrue(f.copy().complete(null));
3623 +        assertTrue(f.copy().cancel(true));
3624 +        assertTrue(f.copy().cancel(false));
3625 +        assertTrue(f.copy().completeExceptionally(new CFException()));
3626 +        checkIncomplete(f);
3627 +    }
3628 +
3629 +    /**
3630 +     * minimalCompletionStage returns a CompletableFuture that is
3631 +     * completed normally, with the same value, when source is.
3632 +     */
3633 +    public void testMinimalCompletionStage() {
3634 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3635 +        CompletionStage<Integer> g = f.minimalCompletionStage();
3636 +        AtomicInteger x = new AtomicInteger(0);
3637 +        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3638 +        checkIncomplete(f);
3639 +        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3640 +        f.complete(1);
3641 +        checkCompletedNormally(f, 1);
3642 +        assertEquals(x.get(), 1);
3643 +        assertNull(r.get());
3644 +    }
3645 +
3646 +    /**
3647 +     * minimalCompletionStage returns a CompletableFuture that is
3648 +     * completed exceptionally when source is.
3649 +     */
3650 +    public void testMinimalCompletionStage2() {
3651 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3652 +        CompletionStage<Integer> g = f.minimalCompletionStage();
3653 +        AtomicInteger x = new AtomicInteger(0);
3654 +        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3655 +        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3656 +        checkIncomplete(f);
3657 +        CFException ex = new CFException();
3658 +        f.completeExceptionally(ex);
3659 +        checkCompletedExceptionally(f, ex);
3660 +        assertEquals(x.get(), 0);
3661 +        assertEquals(r.get().getCause(), ex);
3662 +    }
3663 +
3664 +    /**
3665 +     * failedStage returns a CompletionStage completed
3666 +     * exceptionally with the given Exception
3667 +     */
3668 +    public void testFailedStage() {
3669 +        CFException ex = new CFException();
3670 +        CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3671 +        AtomicInteger x = new AtomicInteger(0);
3672 +        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3673 +        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3674 +        assertEquals(x.get(), 0);
3675 +        assertEquals(r.get(), ex);
3676 +    }
3677 +
3678 +    /**
3679 +     * completeAsync completes with value of given supplier
3680 +     */
3681 +    public void testCompleteAsync() {
3682 +        for (Integer v1 : new Integer[] { 1, null })
3683 +    {
3684 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3685 +        f.completeAsync(() -> v1);
3686 +        f.join();
3687 +        checkCompletedNormally(f, v1);
3688 +    }}
3689 +
3690 +    /**
3691 +     * completeAsync completes exceptionally if given supplier throws
3692 +     */
3693 +    public void testCompleteAsync2() {
3694 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3695 +        CFException ex = new CFException();
3696 +        f.completeAsync(() -> { throw ex; });
3697 +        try {
3698 +            f.join();
3699 +            shouldThrow();
3700 +        } catch (CompletionException success) {}
3701 +        checkCompletedWithWrappedException(f, ex);
3702 +    }
3703 +
3704 +    /**
3705 +     * completeAsync with given executor completes with value of given supplier
3706 +     */
3707 +    public void testCompleteAsync3() {
3708 +        for (Integer v1 : new Integer[] { 1, null })
3709 +    {
3710 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3711 +        ThreadExecutor executor = new ThreadExecutor();
3712 +        f.completeAsync(() -> v1, executor);
3713 +        assertSame(v1, f.join());
3714 +        checkCompletedNormally(f, v1);
3715 +        assertEquals(1, executor.count.get());
3716 +    }}
3717 +
3718 +    /**
3719 +     * completeAsync with given executor completes exceptionally if
3720 +     * given supplier throws
3721 +     */
3722 +    public void testCompleteAsync4() {
3723 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3724 +        CFException ex = new CFException();
3725 +        ThreadExecutor executor = new ThreadExecutor();
3726 +        f.completeAsync(() -> { throw ex; }, executor);
3727 +        try {
3728 +            f.join();
3729 +            shouldThrow();
3730 +        } catch (CompletionException success) {}
3731 +        checkCompletedWithWrappedException(f, ex);
3732 +        assertEquals(1, executor.count.get());
3733 +    }
3734 +
3735 +    /**
3736 +     * orTimeout completes with TimeoutException if not complete
3737 +     */
3738 +    public void testOrTimeout_timesOut() {
3739 +        long timeoutMillis = timeoutMillis();
3740 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3741 +        long startTime = System.nanoTime();
3742 +        assertSame(f, f.orTimeout(timeoutMillis, MILLISECONDS));
3743 +        checkCompletedWithTimeoutException(f);
3744 +        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3745 +    }
3746 +
3747 +    /**
3748 +     * orTimeout completes normally if completed before timeout
3749 +     */
3750 +    public void testOrTimeout_completed() {
3751 +        for (Integer v1 : new Integer[] { 1, null })
3752 +    {
3753 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3754 +        CompletableFuture<Integer> g = new CompletableFuture<>();
3755 +        long startTime = System.nanoTime();
3756 +        f.complete(v1);
3757 +        assertSame(f, f.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3758 +        assertSame(g, g.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3759 +        g.complete(v1);
3760 +        checkCompletedNormally(f, v1);
3761          checkCompletedNormally(g, v1);
3762 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3763 +    }}
3764 +
3765 +    /**
3766 +     * completeOnTimeout completes with given value if not complete
3767 +     */
3768 +    public void testCompleteOnTimeout_timesOut() {
3769 +        testInParallel(() -> testCompleteOnTimeout_timesOut(42),
3770 +                       () -> testCompleteOnTimeout_timesOut(null));
3771 +    }
3772 +
3773 +    /**
3774 +     * completeOnTimeout completes with given value if not complete
3775 +     */
3776 +    public void testCompleteOnTimeout_timesOut(Integer v) {
3777 +        long timeoutMillis = timeoutMillis();
3778 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3779 +        long startTime = System.nanoTime();
3780 +        assertSame(f, f.completeOnTimeout(v, timeoutMillis, MILLISECONDS));
3781 +        assertSame(v, f.join());
3782 +        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3783 +        f.complete(99);         // should have no effect
3784 +        checkCompletedNormally(f, v);
3785 +    }
3786 +
3787 +    /**
3788 +     * completeOnTimeout has no effect if completed within timeout
3789 +     */
3790 +    public void testCompleteOnTimeout_completed() {
3791 +        for (Integer v1 : new Integer[] { 1, null })
3792 +    {
3793 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3794 +        CompletableFuture<Integer> g = new CompletableFuture<>();
3795 +        long startTime = System.nanoTime();
3796 +        f.complete(v1);
3797 +        assertSame(f, f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3798 +        assertSame(g, g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3799 +        g.complete(v1);
3800          checkCompletedNormally(f, v1);
3801 <        assertEquals(1, a.get());
3801 >        checkCompletedNormally(g, v1);
3802 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3803      }}
3804  
3805      /**
3806 <     * whenComplete action executes on exceptional completion, propagating
3469 <     * source result.
3806 >     * delayedExecutor returns an executor that delays submission
3807       */
3808 <    public void testWhenComplete_exceptionalCompletion() {
3808 >    public void testDelayedExecutor() {
3809 >        testInParallel(() -> testDelayedExecutor(null, null),
3810 >                       () -> testDelayedExecutor(null, 1),
3811 >                       () -> testDelayedExecutor(new ThreadExecutor(), 1),
3812 >                       () -> testDelayedExecutor(new ThreadExecutor(), 1));
3813 >    }
3814 >
3815 >    public void testDelayedExecutor(Executor executor, Integer v) throws Exception {
3816 >        long timeoutMillis = timeoutMillis();
3817 >        // Use an "unreasonably long" long timeout to catch lingering threads
3818 >        long longTimeoutMillis = 1000 * 60 * 60 * 24;
3819 >        final Executor delayer, longDelayer;
3820 >        if (executor == null) {
3821 >            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS);
3822 >            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS);
3823 >        } else {
3824 >            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS, executor);
3825 >            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS, executor);
3826 >        }
3827 >        long startTime = System.nanoTime();
3828 >        CompletableFuture<Integer> f =
3829 >            CompletableFuture.supplyAsync(() -> v, delayer);
3830 >        CompletableFuture<Integer> g =
3831 >            CompletableFuture.supplyAsync(() -> v, longDelayer);
3832 >
3833 >        assertNull(g.getNow(null));
3834 >
3835 >        assertSame(v, f.get(LONG_DELAY_MS, MILLISECONDS));
3836 >        long millisElapsed = millisElapsedSince(startTime);
3837 >        assertTrue(millisElapsed >= timeoutMillis);
3838 >        assertTrue(millisElapsed < LONG_DELAY_MS / 2);
3839 >
3840 >        checkCompletedNormally(f, v);
3841 >
3842 >        checkIncomplete(g);
3843 >        assertTrue(g.cancel(true));
3844 >    }
3845 >
3846 >    //--- tests of implementation details; not part of official tck ---
3847 >
3848 >    Object resultOf(CompletableFuture<?> f) {
3849 >        SecurityManager sm = System.getSecurityManager();
3850 >        if (sm != null) {
3851 >            try {
3852 >                System.setSecurityManager(null);
3853 >            } catch (SecurityException giveUp) {
3854 >                return "Reflection not available";
3855 >            }
3856 >        }
3857 >
3858 >        try {
3859 >            java.lang.reflect.Field resultField
3860 >                = CompletableFuture.class.getDeclaredField("result");
3861 >            resultField.setAccessible(true);
3862 >            return resultField.get(f);
3863 >        } catch (Throwable t) {
3864 >            throw new AssertionError(t);
3865 >        } finally {
3866 >            if (sm != null) System.setSecurityManager(sm);
3867 >        }
3868 >    }
3869 >
3870 >    public void testExceptionPropagationReusesResultObject() {
3871 >        if (!testImplementationDetails) return;
3872          for (ExecutionMode m : ExecutionMode.values())
3873 +    {
3874 +        final CFException ex = new CFException();
3875 +        final CompletableFuture<Integer> v42 = CompletableFuture.completedFuture(42);
3876 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3877 +
3878 +        final Runnable noopRunnable = new Noop(m);
3879 +        final Consumer<Integer> noopConsumer = new NoopConsumer(m);
3880 +        final Function<Integer, Integer> incFunction = new IncFunction(m);
3881 +
3882 +        List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> funs
3883 +            = new ArrayList<>();
3884 +
3885 +        funs.add(y -> m.thenRun(y, noopRunnable));
3886 +        funs.add(y -> m.thenAccept(y, noopConsumer));
3887 +        funs.add(y -> m.thenApply(y, incFunction));
3888 +
3889 +        funs.add(y -> m.runAfterEither(y, incomplete, noopRunnable));
3890 +        funs.add(y -> m.acceptEither(y, incomplete, noopConsumer));
3891 +        funs.add(y -> m.applyToEither(y, incomplete, incFunction));
3892 +
3893 +        funs.add(y -> m.runAfterBoth(y, v42, noopRunnable));
3894 +        funs.add(y -> m.runAfterBoth(v42, y, noopRunnable));
3895 +        funs.add(y -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3896 +        funs.add(y -> m.thenAcceptBoth(v42, y, new SubtractAction(m)));
3897 +        funs.add(y -> m.thenCombine(y, v42, new SubtractFunction(m)));
3898 +        funs.add(y -> m.thenCombine(v42, y, new SubtractFunction(m)));
3899 +
3900 +        funs.add(y -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
3901 +
3902 +        funs.add(y -> m.thenCompose(y, new CompletableFutureInc(m)));
3903 +
3904 +        funs.add(y -> CompletableFuture.allOf(y));
3905 +        funs.add(y -> CompletableFuture.allOf(y, v42));
3906 +        funs.add(y -> CompletableFuture.allOf(v42, y));
3907 +        funs.add(y -> CompletableFuture.anyOf(y));
3908 +        funs.add(y -> CompletableFuture.anyOf(y, incomplete));
3909 +        funs.add(y -> CompletableFuture.anyOf(incomplete, y));
3910 +
3911 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3912 +                 fun : funs) {
3913 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3914 +            f.completeExceptionally(ex);
3915 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3916 +            checkCompletedWithWrappedException(src, ex);
3917 +            CompletableFuture<?> dep = fun.apply(src);
3918 +            checkCompletedWithWrappedException(dep, ex);
3919 +            assertSame(resultOf(src), resultOf(dep));
3920 +        }
3921 +
3922 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3923 +                 fun : funs) {
3924 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3925 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3926 +            CompletableFuture<?> dep = fun.apply(src);
3927 +            f.completeExceptionally(ex);
3928 +            checkCompletedWithWrappedException(src, ex);
3929 +            checkCompletedWithWrappedException(dep, ex);
3930 +            assertSame(resultOf(src), resultOf(dep));
3931 +        }
3932 +
3933 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3934 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3935 +                 fun : funs) {
3936 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3937 +            f.cancel(mayInterruptIfRunning);
3938 +            checkCancelled(f);
3939 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3940 +            checkCompletedWithWrappedCancellationException(src);
3941 +            CompletableFuture<?> dep = fun.apply(src);
3942 +            checkCompletedWithWrappedCancellationException(dep);
3943 +            assertSame(resultOf(src), resultOf(dep));
3944 +        }
3945 +
3946 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3947 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3948 +                 fun : funs) {
3949 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3950 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3951 +            CompletableFuture<?> dep = fun.apply(src);
3952 +            f.cancel(mayInterruptIfRunning);
3953 +            checkCancelled(f);
3954 +            checkCompletedWithWrappedCancellationException(src);
3955 +            checkCompletedWithWrappedCancellationException(dep);
3956 +            assertSame(resultOf(src), resultOf(dep));
3957 +        }
3958 +    }}
3959 +
3960 +    /**
3961 +     * Minimal completion stages throw UOE for most non-CompletionStage methods
3962 +     */
3963 +    public void testMinimalCompletionStage_minimality() {
3964 +        if (!testImplementationDetails) return;
3965 +        Function<Method, String> toSignature =
3966 +            method -> method.getName() + Arrays.toString(method.getParameterTypes());
3967 +        Predicate<Method> isNotStatic =
3968 +            method -> (method.getModifiers() & Modifier.STATIC) == 0;
3969 +        List<Method> minimalMethods =
3970 +            Stream.of(Object.class, CompletionStage.class)
3971 +            .flatMap(klazz -> Stream.of(klazz.getMethods()))
3972 +            .filter(isNotStatic)
3973 +            .collect(Collectors.toList());
3974 +        // Methods from CompletableFuture permitted NOT to throw UOE
3975 +        String[] signatureWhitelist = {
3976 +            "newIncompleteFuture[]",
3977 +            "defaultExecutor[]",
3978 +            "minimalCompletionStage[]",
3979 +            "copy[]",
3980 +        };
3981 +        Set<String> permittedMethodSignatures =
3982 +            Stream.concat(minimalMethods.stream().map(toSignature),
3983 +                          Stream.of(signatureWhitelist))
3984 +            .collect(Collectors.toSet());
3985 +        List<Method> allMethods = Stream.of(CompletableFuture.class.getMethods())
3986 +            .filter(isNotStatic)
3987 +            .filter(method -> !permittedMethodSignatures.contains(toSignature.apply(method)))
3988 +            .collect(Collectors.toList());
3989 +
3990 +        List<CompletionStage<Integer>> stages = new ArrayList<>();
3991 +        CompletionStage<Integer> min =
3992 +            new CompletableFuture<Integer>().minimalCompletionStage();
3993 +        stages.add(min);
3994 +        stages.add(min.thenApply(x -> x));
3995 +        stages.add(CompletableFuture.completedStage(1));
3996 +        stages.add(CompletableFuture.failedStage(new CFException()));
3997 +
3998 +        List<Method> bugs = new ArrayList<>();
3999 +        for (Method method : allMethods) {
4000 +            Class<?>[] parameterTypes = method.getParameterTypes();
4001 +            Object[] args = new Object[parameterTypes.length];
4002 +            // Manufacture boxed primitives for primitive params
4003 +            for (int i = 0; i < args.length; i++) {
4004 +                Class<?> type = parameterTypes[i];
4005 +                if (parameterTypes[i] == boolean.class)
4006 +                    args[i] = false;
4007 +                else if (parameterTypes[i] == int.class)
4008 +                    args[i] = 0;
4009 +                else if (parameterTypes[i] == long.class)
4010 +                    args[i] = 0L;
4011 +            }
4012 +            for (CompletionStage<Integer> stage : stages) {
4013 +                try {
4014 +                    method.invoke(stage, args);
4015 +                    bugs.add(method);
4016 +                }
4017 +                catch (java.lang.reflect.InvocationTargetException expected) {
4018 +                    if (! (expected.getCause() instanceof UnsupportedOperationException)) {
4019 +                        bugs.add(method);
4020 +                        // expected.getCause().printStackTrace();
4021 +                    }
4022 +                }
4023 +                catch (ReflectiveOperationException bad) { throw new Error(bad); }
4024 +            }
4025 +        }
4026 +        if (!bugs.isEmpty())
4027 +            throw new Error("Methods did not throw UOE: " + bugs);
4028 +    }
4029 +
4030 +    /**
4031 +     * minimalStage.toCompletableFuture() returns a CompletableFuture that
4032 +     * is completed normally, with the same value, when source is.
4033 +     */
4034 +    public void testMinimalCompletionStage_toCompletableFuture_normalCompletion() {
4035          for (boolean createIncomplete : new boolean[] { true, false })
4036          for (Integer v1 : new Integer[] { 1, null })
4037      {
4038 <        final AtomicInteger a = new AtomicInteger(0);
4039 <        final CFException ex = new CFException();
4040 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
4041 <        if (!createIncomplete) f.completeExceptionally(ex);
4042 <        final CompletableFuture<Integer> g = m.whenComplete
4043 <            (f,
4044 <             (Integer x, Throwable t) -> {
4045 <                threadAssertNull(x);
4046 <                threadAssertSame(t, ex);
4047 <                a.getAndIncrement();
4048 <            });
3487 <        if (createIncomplete) f.completeExceptionally(ex);
3488 <        checkCompletedWithWrappedCFException(f, ex);
3489 <        checkCompletedWithWrappedCFException(g, ex);
3490 <        assertEquals(1, a.get());
4038 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4039 >        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4040 >        if (!createIncomplete) assertTrue(f.complete(v1));
4041 >        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4042 >        if (createIncomplete) {
4043 >            checkIncomplete(f);
4044 >            checkIncomplete(g);
4045 >            assertTrue(f.complete(v1));
4046 >        }
4047 >        checkCompletedNormally(f, v1);
4048 >        checkCompletedNormally(g, v1);
4049      }}
4050  
4051      /**
4052 <     * whenComplete action executes on cancelled source, propagating
4053 <     * CancellationException.
4052 >     * minimalStage.toCompletableFuture() returns a CompletableFuture that
4053 >     * is completed exceptionally when source is.
4054       */
4055 <    public void testWhenComplete_sourceCancelled() {
3498 <        for (ExecutionMode m : ExecutionMode.values())
3499 <        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
4055 >    public void testMinimalCompletionStage_toCompletableFuture_exceptionalCompletion() {
4056          for (boolean createIncomplete : new boolean[] { true, false })
4057      {
4058 <        final AtomicInteger a = new AtomicInteger(0);
4059 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
4060 <        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
4061 <        final CompletableFuture<Integer> g = m.whenComplete
4062 <            (f,
4063 <             (Integer x, Throwable t) -> {
4064 <                threadAssertNull(x);
4065 <                threadAssertTrue(t instanceof CancellationException);
4066 <                a.getAndIncrement();
4067 <            });
4068 <        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
4058 >        CFException ex = new CFException();
4059 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4060 >        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4061 >        if (!createIncomplete) f.completeExceptionally(ex);
4062 >        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4063 >        if (createIncomplete) {
4064 >            checkIncomplete(f);
4065 >            checkIncomplete(g);
4066 >            f.completeExceptionally(ex);
4067 >        }
4068 >        checkCompletedExceptionally(f, ex);
4069 >        checkCompletedWithWrappedException(g, ex);
4070 >    }}
4071  
4072 <        //try { g.join(); } catch (Throwable t) { throw new Error(t); }
4073 <        checkCompletedWithWrappedCancellationException(g);
4074 <        checkCancelled(f);
4075 <        assertEquals(1, a.get());
4072 >    /**
4073 >     * minimalStage.toCompletableFuture() gives mutable CompletableFuture
4074 >     */
4075 >    public void testMinimalCompletionStage_toCompletableFuture_mutable() {
4076 >        for (Integer v1 : new Integer[] { 1, null })
4077 >    {
4078 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4079 >        CompletionStage minimal = f.minimalCompletionStage();
4080 >        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4081 >        assertTrue(g.complete(v1));
4082 >        checkCompletedNormally(g, v1);
4083 >        checkIncomplete(f);
4084 >        checkIncomplete(minimal.toCompletableFuture());
4085      }}
4086  
4087      /**
4088 <     * If a whenComplete action throws an exception when triggered by
3522 <     * a normal completion, it completes exceptionally
4088 >     * minimalStage.toCompletableFuture().join() awaits completion
4089       */
4090 <    public void testWhenComplete_actionFailed() {
4090 >    public void testMinimalCompletionStage_toCompletableFuture_join() throws Exception {
4091          for (boolean createIncomplete : new boolean[] { true, false })
3526        for (ExecutionMode m : ExecutionMode.values())
4092          for (Integer v1 : new Integer[] { 1, null })
4093      {
4094 <        final AtomicInteger a = new AtomicInteger(0);
4095 <        final CFException ex = new CFException();
4096 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
4097 <        if (!createIncomplete) f.complete(v1);
4098 <        final CompletableFuture<Integer> g = m.whenComplete
4099 <            (f,
4100 <             (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());
4094 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4095 >        if (!createIncomplete) assertTrue(f.complete(v1));
4096 >        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4097 >        if (createIncomplete) assertTrue(f.complete(v1));
4098 >        assertEquals(v1, minimal.toCompletableFuture().join());
4099 >        assertEquals(v1, minimal.toCompletableFuture().get());
4100 >        checkCompletedNormally(minimal.toCompletableFuture(), v1);
4101      }}
4102  
4103      /**
4104 <     * If a whenComplete action throws an exception when triggered by
4105 <     * a source completion that also throws an exception, the source
4106 <     * exception takes precedence.
4104 >     * Completion of a toCompletableFuture copy of a minimal stage
4105 >     * does not complete its source.
4106 >     */
4107 >    public void testMinimalCompletionStage_toCompletableFuture_oneWayPropagation() {
4108 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4109 >        CompletionStage<Integer> g = f.minimalCompletionStage();
4110 >        assertTrue(g.toCompletableFuture().complete(1));
4111 >        assertTrue(g.toCompletableFuture().complete(null));
4112 >        assertTrue(g.toCompletableFuture().cancel(true));
4113 >        assertTrue(g.toCompletableFuture().cancel(false));
4114 >        assertTrue(g.toCompletableFuture().completeExceptionally(new CFException()));
4115 >        checkIncomplete(g.toCompletableFuture());
4116 >        f.complete(1);
4117 >        checkCompletedNormally(g.toCompletableFuture(), 1);
4118 >    }
4119 >
4120 >    /** Demo utility method for external reliable toCompletableFuture */
4121 >    static <T> CompletableFuture<T> toCompletableFuture(CompletionStage<T> stage) {
4122 >        CompletableFuture<T> f = new CompletableFuture<>();
4123 >        stage.handle((T t, Throwable ex) -> {
4124 >                         if (ex != null) f.completeExceptionally(ex);
4125 >                         else f.complete(t);
4126 >                         return null;
4127 >                     });
4128 >        return f;
4129 >    }
4130 >
4131 >    /** Demo utility method to join a CompletionStage */
4132 >    static <T> T join(CompletionStage<T> stage) {
4133 >        return toCompletableFuture(stage).join();
4134 >    }
4135 >
4136 >    /**
4137 >     * Joining a minimal stage "by hand" works
4138       */
4139 <    public void testWhenComplete_actionFailedSourceFailed() {
4139 >    public void testMinimalCompletionStage_join_by_hand() {
4140          for (boolean createIncomplete : new boolean[] { true, false })
3554        for (ExecutionMode m : ExecutionMode.values())
4141          for (Integer v1 : new Integer[] { 1, null })
4142      {
4143 <        final AtomicInteger a = new AtomicInteger(0);
4144 <        final CFException ex1 = new CFException();
4145 <        final CFException ex2 = new CFException();
4146 <        final CompletableFuture<Integer> f = new CompletableFuture<>();
4143 >        CompletableFuture<Integer> f = new CompletableFuture<>();
4144 >        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4145 >        CompletableFuture<Integer> g = new CompletableFuture<>();
4146 >        if (!createIncomplete) assertTrue(f.complete(v1));
4147 >        minimal.thenAccept(x -> g.complete(x));
4148 >        if (createIncomplete) assertTrue(f.complete(v1));
4149 >        g.join();
4150 >        checkCompletedNormally(g, v1);
4151 >        checkCompletedNormally(f, v1);
4152 >        assertEquals(v1, join(minimal));
4153 >    }}
4154  
4155 <        if (!createIncomplete) f.completeExceptionally(ex1);
4156 <        final CompletableFuture<Integer> g = m.whenComplete
4157 <            (f,
4158 <             (Integer x, Throwable t) -> {
4159 <                threadAssertSame(t, ex1);
4160 <                threadAssertNull(x);
4161 <                a.getAndIncrement();
4162 <                throw ex2;
4163 <            });
4164 <        if (createIncomplete) f.completeExceptionally(ex1);
4155 >    static class Monad {
4156 >        static class ZeroException extends RuntimeException {
4157 >            public ZeroException() { super("monadic zero"); }
4158 >        }
4159 >        // "return", "unit"
4160 >        static <T> CompletableFuture<T> unit(T value) {
4161 >            return completedFuture(value);
4162 >        }
4163 >        // monadic zero ?
4164 >        static <T> CompletableFuture<T> zero() {
4165 >            return failedFuture(new ZeroException());
4166 >        }
4167 >        // >=>
4168 >        static <T,U,V> Function<T, CompletableFuture<V>> compose
4169 >            (Function<T, CompletableFuture<U>> f,
4170 >             Function<U, CompletableFuture<V>> g) {
4171 >            return x -> f.apply(x).thenCompose(g);
4172 >        }
4173  
4174 <        checkCompletedWithWrappedCFException(f, ex1);
4175 <        checkCompletedWithWrappedCFException(g, ex1);
4176 <        assertEquals(1, a.get());
4174 >        static void assertZero(CompletableFuture<?> f) {
4175 >            try {
4176 >                f.getNow(null);
4177 >                throw new AssertionFailedError("should throw");
4178 >            } catch (CompletionException success) {
4179 >                assertTrue(success.getCause() instanceof ZeroException);
4180 >            }
4181 >        }
4182 >
4183 >        static <T> void assertFutureEquals(CompletableFuture<T> f,
4184 >                                           CompletableFuture<T> g) {
4185 >            T fval = null, gval = null;
4186 >            Throwable fex = null, gex = null;
4187 >
4188 >            try { fval = f.get(); }
4189 >            catch (ExecutionException ex) { fex = ex.getCause(); }
4190 >            catch (Throwable ex) { fex = ex; }
4191 >
4192 >            try { gval = g.get(); }
4193 >            catch (ExecutionException ex) { gex = ex.getCause(); }
4194 >            catch (Throwable ex) { gex = ex; }
4195 >
4196 >            if (fex != null || gex != null)
4197 >                assertSame(fex.getClass(), gex.getClass());
4198 >            else
4199 >                assertEquals(fval, gval);
4200 >        }
4201 >
4202 >        static class PlusFuture<T> extends CompletableFuture<T> {
4203 >            AtomicReference<Throwable> firstFailure = new AtomicReference<>(null);
4204 >        }
4205 >
4206 >        /** Implements "monadic plus". */
4207 >        static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f,
4208 >                                             CompletableFuture<? extends T> g) {
4209 >            PlusFuture<T> plus = new PlusFuture<T>();
4210 >            BiConsumer<T, Throwable> action = (T result, Throwable ex) -> {
4211 >                try {
4212 >                    if (ex == null) {
4213 >                        if (plus.complete(result))
4214 >                            if (plus.firstFailure.get() != null)
4215 >                                plus.firstFailure.set(null);
4216 >                    }
4217 >                    else if (plus.firstFailure.compareAndSet(null, ex)) {
4218 >                        if (plus.isDone())
4219 >                            plus.firstFailure.set(null);
4220 >                    }
4221 >                    else {
4222 >                        // first failure has precedence
4223 >                        Throwable first = plus.firstFailure.getAndSet(null);
4224 >
4225 >                        // may fail with "Self-suppression not permitted"
4226 >                        try { first.addSuppressed(ex); }
4227 >                        catch (Exception ignored) {}
4228 >
4229 >                        plus.completeExceptionally(first);
4230 >                    }
4231 >                } catch (Throwable unexpected) {
4232 >                    plus.completeExceptionally(unexpected);
4233 >                }
4234 >            };
4235 >            f.whenComplete(action);
4236 >            g.whenComplete(action);
4237 >            return plus;
4238 >        }
4239 >    }
4240 >
4241 >    /**
4242 >     * CompletableFuture is an additive monad - sort of.
4243 >     * https://en.wikipedia.org/wiki/Monad_(functional_programming)#Additive_monads
4244 >     */
4245 >    public void testAdditiveMonad() throws Throwable {
4246 >        Function<Long, CompletableFuture<Long>> unit = Monad::unit;
4247 >        CompletableFuture<Long> zero = Monad.zero();
4248 >
4249 >        // Some mutually non-commutative functions
4250 >        Function<Long, CompletableFuture<Long>> triple
4251 >            = x -> Monad.unit(3 * x);
4252 >        Function<Long, CompletableFuture<Long>> inc
4253 >            = x -> Monad.unit(x + 1);
4254 >
4255 >        // unit is a right identity: m >>= unit === m
4256 >        Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
4257 >                                 inc.apply(5L));
4258 >        // unit is a left identity: (unit x) >>= f === f x
4259 >        Monad.assertFutureEquals(unit.apply(5L).thenCompose(inc),
4260 >                                 inc.apply(5L));
4261 >
4262 >        // associativity: (m >>= f) >>= g === m >>= ( \x -> (f x >>= g) )
4263 >        Monad.assertFutureEquals(
4264 >            unit.apply(5L).thenCompose(inc).thenCompose(triple),
4265 >            unit.apply(5L).thenCompose(x -> inc.apply(x).thenCompose(triple)));
4266 >
4267 >        // The case for CompletableFuture as an additive monad is weaker...
4268 >
4269 >        // zero is a monadic zero
4270 >        Monad.assertZero(zero);
4271 >
4272 >        // left zero: zero >>= f === zero
4273 >        Monad.assertZero(zero.thenCompose(inc));
4274 >        // right zero: f >>= (\x -> zero) === zero
4275 >        Monad.assertZero(inc.apply(5L).thenCompose(x -> zero));
4276 >
4277 >        // f plus zero === f
4278 >        Monad.assertFutureEquals(Monad.unit(5L),
4279 >                                 Monad.plus(Monad.unit(5L), zero));
4280 >        // zero plus f === f
4281 >        Monad.assertFutureEquals(Monad.unit(5L),
4282 >                                 Monad.plus(zero, Monad.unit(5L)));
4283 >        // zero plus zero === zero
4284 >        Monad.assertZero(Monad.plus(zero, zero));
4285 >        {
4286 >            CompletableFuture<Long> f = Monad.plus(Monad.unit(5L),
4287 >                                                   Monad.unit(8L));
4288 >            // non-determinism
4289 >            assertTrue(f.get() == 5L || f.get() == 8L);
4290 >        }
4291 >
4292 >        CompletableFuture<Long> godot = new CompletableFuture<>();
4293 >        // f plus godot === f (doesn't wait for godot)
4294 >        Monad.assertFutureEquals(Monad.unit(5L),
4295 >                                 Monad.plus(Monad.unit(5L), godot));
4296 >        // godot plus f === f (doesn't wait for godot)
4297 >        Monad.assertFutureEquals(Monad.unit(5L),
4298 >                                 Monad.plus(godot, Monad.unit(5L)));
4299 >    }
4300 >
4301 >    /** Test long recursive chains of CompletableFutures with cascading completions */
4302 >    public void testRecursiveChains() throws Throwable {
4303 >        for (ExecutionMode m : ExecutionMode.values())
4304 >        for (boolean addDeadEnds : new boolean[] { true, false })
4305 >    {
4306 >        final int val = 42;
4307 >        final int n = expensiveTests ? 1_000 : 2;
4308 >        CompletableFuture<Integer> head = new CompletableFuture<>();
4309 >        CompletableFuture<Integer> tail = head;
4310 >        for (int i = 0; i < n; i++) {
4311 >            if (addDeadEnds) m.thenApply(tail, v -> v + 1);
4312 >            tail = m.thenApply(tail, v -> v + 1);
4313 >            if (addDeadEnds) m.applyToEither(tail, tail, v -> v + 1);
4314 >            tail = m.applyToEither(tail, tail, v -> v + 1);
4315 >            if (addDeadEnds) m.thenCombine(tail, tail, (v, w) -> v + 1);
4316 >            tail = m.thenCombine(tail, tail, (v, w) -> v + 1);
4317 >        }
4318 >        head.complete(val);
4319 >        assertEquals(val + 3 * n, (int) tail.join());
4320      }}
4321  
4322 +    /**
4323 +     * A single CompletableFuture with many dependents.
4324 +     * A demo of scalability - runtime is O(n).
4325 +     */
4326 +    public void testManyDependents() throws Throwable {
4327 +        final int n = expensiveTests ? 1_000_000 : 10;
4328 +        final CompletableFuture<Void> head = new CompletableFuture<>();
4329 +        final CompletableFuture<Void> complete = CompletableFuture.completedFuture((Void)null);
4330 +        final AtomicInteger count = new AtomicInteger(0);
4331 +        for (int i = 0; i < n; i++) {
4332 +            head.thenRun(() -> count.getAndIncrement());
4333 +            head.thenAccept(x -> count.getAndIncrement());
4334 +            head.thenApply(x -> count.getAndIncrement());
4335 +
4336 +            head.runAfterBoth(complete, () -> count.getAndIncrement());
4337 +            head.thenAcceptBoth(complete, (x, y) -> count.getAndIncrement());
4338 +            head.thenCombine(complete, (x, y) -> count.getAndIncrement());
4339 +            complete.runAfterBoth(head, () -> count.getAndIncrement());
4340 +            complete.thenAcceptBoth(head, (x, y) -> count.getAndIncrement());
4341 +            complete.thenCombine(head, (x, y) -> count.getAndIncrement());
4342 +
4343 +            head.runAfterEither(new CompletableFuture<Void>(), () -> count.getAndIncrement());
4344 +            head.acceptEither(new CompletableFuture<Void>(), x -> count.getAndIncrement());
4345 +            head.applyToEither(new CompletableFuture<Void>(), x -> count.getAndIncrement());
4346 +            new CompletableFuture<Void>().runAfterEither(head, () -> count.getAndIncrement());
4347 +            new CompletableFuture<Void>().acceptEither(head, x -> count.getAndIncrement());
4348 +            new CompletableFuture<Void>().applyToEither(head, x -> count.getAndIncrement());
4349 +        }
4350 +        head.complete(null);
4351 +        assertEquals(5 * 3 * n, count.get());
4352 +    }
4353 +
4354 +    /** ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest tck */
4355 +    public void testCoCompletionGarbageRetention() throws Throwable {
4356 +        final int n = expensiveTests ? 1_000_000 : 10;
4357 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
4358 +        CompletableFuture<Integer> f;
4359 +        for (int i = 0; i < n; i++) {
4360 +            f = new CompletableFuture<>();
4361 +            f.runAfterEither(incomplete, () -> {});
4362 +            f.complete(null);
4363 +
4364 +            f = new CompletableFuture<>();
4365 +            f.acceptEither(incomplete, x -> {});
4366 +            f.complete(null);
4367 +
4368 +            f = new CompletableFuture<>();
4369 +            f.applyToEither(incomplete, x -> x);
4370 +            f.complete(null);
4371 +
4372 +            f = new CompletableFuture<>();
4373 +            CompletableFuture.anyOf(new CompletableFuture<?>[] { f, incomplete });
4374 +            f.complete(null);
4375 +        }
4376 +
4377 +        for (int i = 0; i < n; i++) {
4378 +            f = new CompletableFuture<>();
4379 +            incomplete.runAfterEither(f, () -> {});
4380 +            f.complete(null);
4381 +
4382 +            f = new CompletableFuture<>();
4383 +            incomplete.acceptEither(f, x -> {});
4384 +            f.complete(null);
4385 +
4386 +            f = new CompletableFuture<>();
4387 +            incomplete.applyToEither(f, x -> x);
4388 +            f.complete(null);
4389 +
4390 +            f = new CompletableFuture<>();
4391 +            CompletableFuture.anyOf(new CompletableFuture<?>[] { incomplete, f });
4392 +            f.complete(null);
4393 +        }
4394 +    }
4395 +
4396 +    /**
4397 +     * Reproduction recipe for:
4398 +     * 8160402: Garbage retention with CompletableFuture.anyOf
4399 +     * 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
4400 +     */
4401 +    public void testAnyOfGarbageRetention() throws Throwable {
4402 +        for (Integer v : new Integer[] { 1, null })
4403 +    {
4404 +        final int n = expensiveTests ? 100_000 : 10;
4405 +        CompletableFuture<Integer>[] fs
4406 +            = (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4407 +        for (int i = 0; i < fs.length; i++)
4408 +            fs[i] = new CompletableFuture<>();
4409 +        fs[fs.length - 1].complete(v);
4410 +        for (int i = 0; i < n; i++)
4411 +            checkCompletedNormally(CompletableFuture.anyOf(fs), v);
4412 +    }}
4413 +
4414 +    /**
4415 +     * Checks for garbage retention with allOf.
4416 +     *
4417 +     * As of 2016-07, fails with OOME:
4418 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledAllOfGarbageRetention tck
4419 +     */
4420 +    public void testCancelledAllOfGarbageRetention() throws Throwable {
4421 +        final int n = expensiveTests ? 100_000 : 10;
4422 +        CompletableFuture<Integer>[] fs
4423 +            = (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4424 +        for (int i = 0; i < fs.length; i++)
4425 +            fs[i] = new CompletableFuture<>();
4426 +        for (int i = 0; i < n; i++)
4427 +            assertTrue(CompletableFuture.allOf(fs).cancel(false));
4428 +    }
4429 +
4430 +    /**
4431 +     * Checks for garbage retention when a dependent future is
4432 +     * cancelled and garbage-collected.
4433 +     * 8161600: Garbage retention when source CompletableFutures are never completed
4434 +     *
4435 +     * As of 2016-07, fails with OOME:
4436 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledGarbageRetention tck
4437 +     */
4438 +    public void testCancelledGarbageRetention() throws Throwable {
4439 +        final int n = expensiveTests ? 100_000 : 10;
4440 +        CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4441 +        for (int i = 0; i < n; i++)
4442 +            assertTrue(neverCompleted.thenRun(() -> {}).cancel(true));
4443 +    }
4444 +
4445 +    /**
4446 +     * Checks for garbage retention when MinimalStage.toCompletableFuture()
4447 +     * is invoked many times.
4448 +     * 8161600: Garbage retention when source CompletableFutures are never completed
4449 +     *
4450 +     * As of 2016-07, fails with OOME:
4451 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testToCompletableFutureGarbageRetention tck
4452 +     */
4453 +    public void testToCompletableFutureGarbageRetention() throws Throwable {
4454 +        final int n = expensiveTests ? 900_000 : 10;
4455 +        CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4456 +        CompletionStage minimal = neverCompleted.minimalCompletionStage();
4457 +        for (int i = 0; i < n; i++)
4458 +            assertTrue(minimal.toCompletableFuture().cancel(true));
4459 +    }
4460 +
4461 + //     static <U> U join(CompletionStage<U> stage) {
4462 + //         CompletableFuture<U> f = new CompletableFuture<>();
4463 + //         stage.whenComplete((v, ex) -> {
4464 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4465 + //         });
4466 + //         return f.join();
4467 + //     }
4468 +
4469 + //     static <U> boolean isDone(CompletionStage<U> stage) {
4470 + //         CompletableFuture<U> f = new CompletableFuture<>();
4471 + //         stage.whenComplete((v, ex) -> {
4472 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4473 + //         });
4474 + //         return f.isDone();
4475 + //     }
4476 +
4477 + //     static <U> U join2(CompletionStage<U> stage) {
4478 + //         return stage.toCompletableFuture().copy().join();
4479 + //     }
4480 +
4481 + //     static <U> boolean isDone2(CompletionStage<U> stage) {
4482 + //         return stage.toCompletableFuture().copy().isDone();
4483 + //     }
4484 +
4485   }

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