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Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.4 by jsr166, Sun Feb 10 21:18:25 2013 UTC vs.
Revision 1.55 by jsr166, Mon Jun 2 21:41:37 2014 UTC

# Line 7 | Line 7
7  
8   import junit.framework.*;
9   import java.util.concurrent.Callable;
10 + import java.util.concurrent.Executor;
11 + import java.util.concurrent.ExecutorService;
12 + import java.util.concurrent.Executors;
13   import java.util.concurrent.CancellationException;
14   import java.util.concurrent.CountDownLatch;
15   import java.util.concurrent.ExecutionException;
16   import java.util.concurrent.Future;
17   import java.util.concurrent.CompletableFuture;
18 + import java.util.concurrent.CompletionException;
19 + import java.util.concurrent.CompletionStage;
20 + import java.util.concurrent.ForkJoinPool;
21 + import java.util.concurrent.ForkJoinTask;
22   import java.util.concurrent.TimeoutException;
23   import java.util.concurrent.atomic.AtomicInteger;
24   import static java.util.concurrent.TimeUnit.MILLISECONDS;
25   import static java.util.concurrent.TimeUnit.SECONDS;
26   import java.util.*;
27 + import java.util.function.Supplier;
28 + import java.util.function.Consumer;
29 + import java.util.function.BiConsumer;
30 + import java.util.function.Function;
31 + import java.util.function.BiFunction;
32  
33   public class CompletableFutureTest extends JSR166TestCase {
34  
# Line 27 | Line 39 | public class CompletableFutureTest exten
39          return new TestSuite(CompletableFutureTest.class);
40      }
41  
42 +    static class CFException extends RuntimeException {}
43 +
44      void checkIncomplete(CompletableFuture<?> f) {
45          assertFalse(f.isDone());
46          assertFalse(f.isCancelled());
# Line 42 | Line 56 | public class CompletableFutureTest exten
56          catch (Throwable fail) { threadUnexpectedException(fail); }
57      }
58  
59 <    void checkCompletedNormally(CompletableFuture<?> f, Object value) {
59 >    <T> void checkCompletedNormally(CompletableFuture<T> f, T value) {
60 >        try {
61 >            assertEquals(value, f.get(LONG_DELAY_MS, MILLISECONDS));
62 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
63 >        try {
64 >            assertEquals(value, f.join());
65 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
66 >        try {
67 >            assertEquals(value, f.getNow(null));
68 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
69 >        try {
70 >            assertEquals(value, f.get());
71 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
72          assertTrue(f.isDone());
73          assertFalse(f.isCancelled());
74 +        assertFalse(f.isCompletedExceptionally());
75          assertTrue(f.toString().contains("[Completed normally]"));
76 +    }
77 +
78 +    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
79 +        try {
80 +            f.get(LONG_DELAY_MS, MILLISECONDS);
81 +            shouldThrow();
82 +        } catch (ExecutionException success) {
83 +            assertTrue(success.getCause() instanceof CFException);
84 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
85 +        try {
86 +            f.join();
87 +            shouldThrow();
88 +        } catch (CompletionException success) {
89 +            assertTrue(success.getCause() instanceof CFException);
90 +        }
91 +        try {
92 +            f.getNow(null);
93 +            shouldThrow();
94 +        } catch (CompletionException success) {
95 +            assertTrue(success.getCause() instanceof CFException);
96 +        }
97 +        try {
98 +            f.get();
99 +            shouldThrow();
100 +        } catch (ExecutionException success) {
101 +            assertTrue(success.getCause() instanceof CFException);
102 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
103 +        assertTrue(f.isDone());
104 +        assertFalse(f.isCancelled());
105 +        assertTrue(f.toString().contains("[Completed exceptionally]"));
106 +    }
107 +
108 +    void checkCompletedWithWrappedCFException(CompletableFuture<?> f,
109 +                                              CFException ex) {
110 +        try {
111 +            f.get(LONG_DELAY_MS, MILLISECONDS);
112 +            shouldThrow();
113 +        } catch (ExecutionException success) {
114 +            assertSame(ex, success.getCause());
115 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
116 +        try {
117 +            f.join();
118 +            shouldThrow();
119 +        } catch (CompletionException success) {
120 +            assertSame(ex, success.getCause());
121 +        }
122 +        try {
123 +            f.getNow(null);
124 +            shouldThrow();
125 +        } catch (CompletionException success) {
126 +            assertSame(ex, success.getCause());
127 +        }
128          try {
129 <            assertSame(value, f.join());
129 >            f.get();
130 >            shouldThrow();
131 >        } catch (ExecutionException success) {
132 >            assertSame(ex, success.getCause());
133          } catch (Throwable fail) { threadUnexpectedException(fail); }
134 +        assertTrue(f.isDone());
135 +        assertFalse(f.isCancelled());
136 +        assertTrue(f.toString().contains("[Completed exceptionally]"));
137 +    }
138 +
139 +    void checkCancelled(CompletableFuture<?> f) {
140          try {
141 <            assertSame(value, f.getNow(null));
141 >            f.get(LONG_DELAY_MS, MILLISECONDS);
142 >            shouldThrow();
143 >        } catch (CancellationException success) {
144          } catch (Throwable fail) { threadUnexpectedException(fail); }
145          try {
146 <            assertSame(value, f.get());
146 >            f.join();
147 >            shouldThrow();
148 >        } catch (CancellationException success) {}
149 >        try {
150 >            f.getNow(null);
151 >            shouldThrow();
152 >        } catch (CancellationException success) {}
153 >        try {
154 >            f.get();
155 >            shouldThrow();
156 >        } catch (CancellationException success) {
157          } catch (Throwable fail) { threadUnexpectedException(fail); }
158 +        assertTrue(f.isDone());
159 +        assertTrue(f.isCompletedExceptionally());
160 +        assertTrue(f.isCancelled());
161 +        assertTrue(f.toString().contains("[Completed exceptionally]"));
162 +    }
163 +
164 +    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
165          try {
166 <            assertSame(value, f.get(0L, SECONDS));
166 >            f.get(LONG_DELAY_MS, MILLISECONDS);
167 >            shouldThrow();
168 >        } catch (ExecutionException success) {
169 >            assertTrue(success.getCause() instanceof CancellationException);
170          } catch (Throwable fail) { threadUnexpectedException(fail); }
171 +        try {
172 +            f.join();
173 +            shouldThrow();
174 +        } catch (CompletionException success) {
175 +            assertTrue(success.getCause() instanceof CancellationException);
176 +        }
177 +        try {
178 +            f.getNow(null);
179 +            shouldThrow();
180 +        } catch (CompletionException success) {
181 +            assertTrue(success.getCause() instanceof CancellationException);
182 +        }
183 +        try {
184 +            f.get();
185 +            shouldThrow();
186 +        } catch (ExecutionException success) {
187 +            assertTrue(success.getCause() instanceof CancellationException);
188 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
189 +        assertTrue(f.isDone());
190 +        assertFalse(f.isCancelled());
191 +        assertTrue(f.isCompletedExceptionally());
192 +        assertTrue(f.toString().contains("[Completed exceptionally]"));
193      }
194  
195 <    // XXXX Just a skeleton implementation for now.
196 <    public void testTODO() {
197 <        fail("Please add some real tests!");
195 >    /**
196 >     * A newly constructed CompletableFuture is incomplete, as indicated
197 >     * by methods isDone, isCancelled, and getNow
198 >     */
199 >    public void testConstructor() {
200 >        CompletableFuture<Integer> f = new CompletableFuture<>();
201 >        checkIncomplete(f);
202 >    }
203 >
204 >    /**
205 >     * complete completes normally, as indicated by methods isDone,
206 >     * isCancelled, join, get, and getNow
207 >     */
208 >    public void testComplete() {
209 >        CompletableFuture<Integer> f = new CompletableFuture<>();
210 >        checkIncomplete(f);
211 >        f.complete(one);
212 >        checkCompletedNormally(f, one);
213      }
214  
215 +    /**
216 +     * completeExceptionally completes exceptionally, as indicated by
217 +     * methods isDone, isCancelled, join, get, and getNow
218 +     */
219 +    public void testCompleteExceptionally() {
220 +        CompletableFuture<Integer> f = new CompletableFuture<>();
221 +        checkIncomplete(f);
222 +        f.completeExceptionally(new CFException());
223 +        checkCompletedWithWrappedCFException(f);
224 +    }
225 +
226 +    /**
227 +     * cancel completes exceptionally and reports cancelled, as indicated by
228 +     * methods isDone, isCancelled, join, get, and getNow
229 +     */
230 +    public void testCancel() {
231 +        CompletableFuture<Integer> f = new CompletableFuture<>();
232 +        checkIncomplete(f);
233 +        assertTrue(f.cancel(true));
234 +        checkCancelled(f);
235 +    }
236 +
237 +    /**
238 +     * obtrudeValue forces completion with given value
239 +     */
240 +    public void testObtrudeValue() {
241 +        CompletableFuture<Integer> f = new CompletableFuture<>();
242 +        checkIncomplete(f);
243 +        f.complete(one);
244 +        checkCompletedNormally(f, one);
245 +        f.obtrudeValue(three);
246 +        checkCompletedNormally(f, three);
247 +        f.obtrudeValue(two);
248 +        checkCompletedNormally(f, two);
249 +        f = new CompletableFuture<>();
250 +        f.obtrudeValue(three);
251 +        checkCompletedNormally(f, three);
252 +        f.obtrudeValue(null);
253 +        checkCompletedNormally(f, null);
254 +        f = new CompletableFuture<>();
255 +        f.completeExceptionally(new CFException());
256 +        f.obtrudeValue(four);
257 +        checkCompletedNormally(f, four);
258 +    }
259 +
260 +    /**
261 +     * obtrudeException forces completion with given exception
262 +     */
263 +    public void testObtrudeException() {
264 +        CompletableFuture<Integer> f = new CompletableFuture<>();
265 +        checkIncomplete(f);
266 +        f.complete(one);
267 +        checkCompletedNormally(f, one);
268 +        f.obtrudeException(new CFException());
269 +        checkCompletedWithWrappedCFException(f);
270 +        f = new CompletableFuture<>();
271 +        f.obtrudeException(new CFException());
272 +        checkCompletedWithWrappedCFException(f);
273 +        f = new CompletableFuture<>();
274 +        f.completeExceptionally(new CFException());
275 +        f.obtrudeValue(four);
276 +        checkCompletedNormally(f, four);
277 +        f.obtrudeException(new CFException());
278 +        checkCompletedWithWrappedCFException(f);
279 +    }
280 +
281 +    /**
282 +     * getNumberOfDependents returns number of dependent tasks
283 +     */
284 +    public void testGetNumberOfDependents() {
285 +        CompletableFuture<Integer> f = new CompletableFuture<>();
286 +        assertEquals(0, f.getNumberOfDependents());
287 +        CompletableFuture g = f.thenRun(new Noop(ExecutionMode.DEFAULT));
288 +        assertEquals(1, f.getNumberOfDependents());
289 +        assertEquals(0, g.getNumberOfDependents());
290 +        CompletableFuture h = f.thenRun(new Noop(ExecutionMode.DEFAULT));
291 +        assertEquals(2, f.getNumberOfDependents());
292 +        f.complete(1);
293 +        checkCompletedNormally(g, null);
294 +        assertEquals(0, f.getNumberOfDependents());
295 +        assertEquals(0, g.getNumberOfDependents());
296 +    }
297 +
298 +    /**
299 +     * toString indicates current completion state
300 +     */
301      public void testToString() {
302          CompletableFuture<String> f;
303  
# Line 80 | Line 313 | public class CompletableFutureTest exten
313      }
314  
315      /**
316 +     * completedFuture returns a completed CompletableFuture with given value
317 +     */
318 +    public void testCompletedFuture() {
319 +        CompletableFuture<String> f = CompletableFuture.completedFuture("test");
320 +        checkCompletedNormally(f, "test");
321 +    }
322 +
323 +    // Choose non-commutative actions for better coverage
324 +
325 +    // A non-commutative function that handles and produces null values as well.
326 +    static Integer subtract(Integer x, Integer y) {
327 +        return (x == null && y == null) ? null :
328 +            ((x == null) ? 42 : x.intValue())
329 +            - ((y == null) ? 99 : y.intValue());
330 +    }
331 +
332 +    // A function that handles and produces null values as well.
333 +    static Integer inc(Integer x) {
334 +        return (x == null) ? null : x + 1;
335 +    }
336 +
337 +    static final Supplier<Integer> supplyOne =
338 +        () -> Integer.valueOf(1);
339 +    static final Function<Integer, Integer> inc =
340 +        (Integer x) -> Integer.valueOf(x.intValue() + 1);
341 +    static final BiFunction<Integer, Integer, Integer> subtract =
342 +        (Integer x, Integer y) -> subtract(x, y);
343 +    static final class IncAction implements Consumer<Integer> {
344 +        int invocationCount = 0;
345 +        Integer value;
346 +        public void accept(Integer x) {
347 +            invocationCount++;
348 +            value = inc(x);
349 +        }
350 +    }
351 +    static final class IncFunction implements Function<Integer,Integer> {
352 +        int invocationCount = 0;
353 +        Integer value;
354 +        public Integer apply(Integer x) {
355 +            invocationCount++;
356 +            return value = inc(x);
357 +        }
358 +    }
359 +    static final class SubtractAction implements BiConsumer<Integer, Integer> {
360 +        int invocationCount = 0;
361 +        Integer value;
362 +        // Check this action was invoked exactly once when result is computed.
363 +        public void accept(Integer x, Integer y) {
364 +            invocationCount++;
365 +            value = subtract(x, y);
366 +        }
367 +    }
368 +    static final class SubtractFunction implements BiFunction<Integer, Integer, Integer> {
369 +        int invocationCount = 0;
370 +        Integer value;
371 +        // Check this action was invoked exactly once when result is computed.
372 +        public Integer apply(Integer x, Integer y) {
373 +            invocationCount++;
374 +            return value = subtract(x, y);
375 +        }
376 +    }
377 +    static final class Noop implements Runnable {
378 +        final ExecutionMode m;
379 +        int invocationCount = 0;
380 +        Noop(ExecutionMode m) { this.m = m; }
381 +        public void run() {
382 +            m.checkExecutionMode();
383 +            invocationCount++;
384 +        }
385 +    }
386 +
387 +    static final class FailingSupplier implements Supplier<Integer> {
388 +        int invocationCount = 0;
389 +        public Integer get() {
390 +            invocationCount++;
391 +            throw new CFException();
392 +        }
393 +    }
394 +    static final class FailingConsumer implements Consumer<Integer> {
395 +        int invocationCount = 0;
396 +        public void accept(Integer x) {
397 +            invocationCount++;
398 +            throw new CFException();
399 +        }
400 +    }
401 +    static final class FailingBiConsumer implements BiConsumer<Integer, Integer> {
402 +        int invocationCount = 0;
403 +        public void accept(Integer x, Integer y) {
404 +            invocationCount++;
405 +            throw new CFException();
406 +        }
407 +    }
408 +    static final class FailingFunction implements Function<Integer, Integer> {
409 +        int invocationCount = 0;
410 +        public Integer apply(Integer x) {
411 +            invocationCount++;
412 +            throw new CFException();
413 +        }
414 +    }
415 +    static final class FailingBiFunction implements BiFunction<Integer, Integer, Integer> {
416 +        int invocationCount = 0;
417 +        public Integer apply(Integer x, Integer y) {
418 +            invocationCount++;
419 +            throw new CFException();
420 +        }
421 +    }
422 +    static final class FailingRunnable implements Runnable {
423 +        int invocationCount = 0;
424 +        public void run() {
425 +            invocationCount++;
426 +            throw new CFException();
427 +        }
428 +    }
429 +
430 +    static final class CompletableFutureInc
431 +        implements Function<Integer, CompletableFuture<Integer>> {
432 +        int invocationCount = 0;
433 +        public CompletableFuture<Integer> apply(Integer x) {
434 +            invocationCount++;
435 +            CompletableFuture<Integer> f = new CompletableFuture<>();
436 +            f.complete(inc(x));
437 +            return f;
438 +        }
439 +    }
440 +
441 +    static final class FailingCompletableFutureFunction
442 +        implements Function<Integer, CompletableFuture<Integer>> {
443 +        int invocationCount = 0;
444 +        public CompletableFuture<Integer> apply(Integer x) {
445 +            invocationCount++;
446 +            throw new CFException();
447 +        }
448 +    }
449 +
450 +    // Used for explicit executor tests
451 +    static final class ThreadExecutor implements Executor {
452 +        AtomicInteger count = new AtomicInteger(0);
453 +
454 +        public void execute(Runnable r) {
455 +            count.getAndIncrement();
456 +            new Thread(r).start();
457 +        }
458 +    }
459 +
460 +    /**
461 +     * Permits the testing of parallel code for the 3 different
462 +     * execution modes without repeating all the testing code.
463 +     */
464 +    enum ExecutionMode {
465 +        DEFAULT {
466 +            public void checkExecutionMode() {
467 +                assertNull(ForkJoinTask.getPool());
468 +            }
469 +            public <T> CompletableFuture<Void> thenRun
470 +                (CompletableFuture<T> f, Runnable a) {
471 +                return f.thenRun(a);
472 +            }
473 +            public <T> CompletableFuture<Void> thenAccept
474 +                (CompletableFuture<T> f, Consumer<? super T> a) {
475 +                return f.thenAccept(a);
476 +            }
477 +            public <T,U> CompletableFuture<U> thenApply
478 +                (CompletableFuture<T> f, Function<? super T,U> a) {
479 +                return f.thenApply(a);
480 +            }
481 +            public <T,U> CompletableFuture<U> thenCompose
482 +                (CompletableFuture<T> f,
483 +                 Function<? super T,? extends CompletionStage<U>> a) {
484 +                return f.thenCompose(a);
485 +            }
486 +            public <T,U> CompletableFuture<U> handle
487 +                (CompletableFuture<T> f,
488 +                 BiFunction<? super T,Throwable,? extends U> a) {
489 +                return f.handle(a);
490 +            }
491 +            public <T> CompletableFuture<T> whenComplete
492 +                (CompletableFuture<T> f,
493 +                 BiConsumer<? super T,? super Throwable> a) {
494 +                return f.whenComplete(a);
495 +            }
496 +            public <T,U> CompletableFuture<Void> runAfterBoth
497 +                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
498 +                return f.runAfterBoth(g, a);
499 +            }
500 +            public <T,U> CompletableFuture<Void> thenAcceptBoth
501 +                (CompletableFuture<T> f,
502 +                 CompletionStage<? extends U> g,
503 +                 BiConsumer<? super T,? super U> a) {
504 +                return f.thenAcceptBoth(g, a);
505 +            }
506 +            public <T,U,V> CompletableFuture<V> thenCombine
507 +                (CompletableFuture<T> f,
508 +                 CompletionStage<? extends U> g,
509 +                 BiFunction<? super T,? super U,? extends V> a) {
510 +                return f.thenCombine(g, a);
511 +            }
512 +            public <T> CompletableFuture<Void> runAfterEither
513 +                (CompletableFuture<T> f,
514 +                 CompletionStage<?> g,
515 +                 java.lang.Runnable a) {
516 +                return f.runAfterEither(g, a);
517 +            }
518 +            public <T> CompletableFuture<Void> acceptEither
519 +                (CompletableFuture<T> f,
520 +                 CompletionStage<? extends T> g,
521 +                 Consumer<? super T> a) {
522 +                return f.acceptEither(g, a);
523 +            }
524 +            public <T,U> CompletableFuture<U> applyToEither
525 +                (CompletableFuture<T> f,
526 +                 CompletionStage<? extends T> g,
527 +                 Function<? super T,U> a) {
528 +                return f.applyToEither(g, a);
529 +            }
530 +        },
531 +
532 +        ASYNC {
533 +            public void checkExecutionMode() {
534 +                assertSame(ForkJoinPool.commonPool(),
535 +                           ForkJoinTask.getPool());
536 +            }
537 +            public <T> CompletableFuture<Void> thenRun
538 +                (CompletableFuture<T> f, Runnable a) {
539 +                return f.thenRunAsync(a);
540 +            }
541 +            public <T> CompletableFuture<Void> thenAccept
542 +                (CompletableFuture<T> f, Consumer<? super T> a) {
543 +                return f.thenAcceptAsync(a);
544 +            }
545 +            public <T,U> CompletableFuture<U> thenApply
546 +                (CompletableFuture<T> f, Function<? super T,U> a) {
547 +                return f.thenApplyAsync(a);
548 +            }
549 +            public <T,U> CompletableFuture<U> thenCompose
550 +                (CompletableFuture<T> f,
551 +                 Function<? super T,? extends CompletionStage<U>> a) {
552 +                return f.thenComposeAsync(a);
553 +            }
554 +            public <T,U> CompletableFuture<U> handle
555 +                (CompletableFuture<T> f,
556 +                 BiFunction<? super T,Throwable,? extends U> a) {
557 +                return f.handleAsync(a);
558 +            }
559 +            public <T> CompletableFuture<T> whenComplete
560 +                (CompletableFuture<T> f,
561 +                 BiConsumer<? super T,? super Throwable> a) {
562 +                return f.whenCompleteAsync(a);
563 +            }
564 +            public <T,U> CompletableFuture<Void> runAfterBoth
565 +                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
566 +                return f.runAfterBothAsync(g, a);
567 +            }
568 +            public <T,U> CompletableFuture<Void> thenAcceptBoth
569 +                (CompletableFuture<T> f,
570 +                 CompletionStage<? extends U> g,
571 +                 BiConsumer<? super T,? super U> a) {
572 +                return f.thenAcceptBothAsync(g, a);
573 +            }
574 +            public <T,U,V> CompletableFuture<V> thenCombine
575 +                (CompletableFuture<T> f,
576 +                 CompletionStage<? extends U> g,
577 +                 BiFunction<? super T,? super U,? extends V> a) {
578 +                return f.thenCombineAsync(g, a);
579 +            }
580 +            public <T> CompletableFuture<Void> runAfterEither
581 +                (CompletableFuture<T> f,
582 +                 CompletionStage<?> g,
583 +                 java.lang.Runnable a) {
584 +                return f.runAfterEitherAsync(g, a);
585 +            }
586 +            public <T> CompletableFuture<Void> acceptEither
587 +                (CompletableFuture<T> f,
588 +                 CompletionStage<? extends T> g,
589 +                 Consumer<? super T> a) {
590 +                return f.acceptEitherAsync(g, a);
591 +            }
592 +            public <T,U> CompletableFuture<U> applyToEither
593 +                (CompletableFuture<T> f,
594 +                 CompletionStage<? extends T> g,
595 +                 Function<? super T,U> a) {
596 +                return f.applyToEitherAsync(g, a);
597 +            }
598 +        },
599 +
600 +        EXECUTOR {
601 +            public void checkExecutionMode() {
602 +                //TODO
603 +            }
604 +            public <T> CompletableFuture<Void> thenRun
605 +                (CompletableFuture<T> f, Runnable a) {
606 +                return f.thenRunAsync(a, new ThreadExecutor());
607 +            }
608 +            public <T> CompletableFuture<Void> thenAccept
609 +                (CompletableFuture<T> f, Consumer<? super T> a) {
610 +                return f.thenAcceptAsync(a, new ThreadExecutor());
611 +            }
612 +            public <T,U> CompletableFuture<U> thenApply
613 +                (CompletableFuture<T> f, Function<? super T,U> a) {
614 +                return f.thenApplyAsync(a, new ThreadExecutor());
615 +            }
616 +            public <T,U> CompletableFuture<U> thenCompose
617 +                (CompletableFuture<T> f,
618 +                 Function<? super T,? extends CompletionStage<U>> a) {
619 +                return f.thenComposeAsync(a, new ThreadExecutor());
620 +            }
621 +            public <T,U> CompletableFuture<U> handle
622 +                (CompletableFuture<T> f,
623 +                 BiFunction<? super T,Throwable,? extends U> a) {
624 +                return f.handleAsync(a, new ThreadExecutor());
625 +            }
626 +            public <T> CompletableFuture<T> whenComplete
627 +                (CompletableFuture<T> f,
628 +                 BiConsumer<? super T,? super Throwable> a) {
629 +                return f.whenCompleteAsync(a, new ThreadExecutor());
630 +            }
631 +            public <T,U> CompletableFuture<Void> runAfterBoth
632 +                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
633 +                return f.runAfterBothAsync(g, a, new ThreadExecutor());
634 +            }
635 +            public <T,U> CompletableFuture<Void> thenAcceptBoth
636 +                (CompletableFuture<T> f,
637 +                 CompletionStage<? extends U> g,
638 +                 BiConsumer<? super T,? super U> a) {
639 +                return f.thenAcceptBothAsync(g, a, new ThreadExecutor());
640 +            }
641 +            public <T,U,V> CompletableFuture<V> thenCombine
642 +                (CompletableFuture<T> f,
643 +                 CompletionStage<? extends U> g,
644 +                 BiFunction<? super T,? super U,? extends V> a) {
645 +                return f.thenCombineAsync(g, a, new ThreadExecutor());
646 +            }
647 +            public <T> CompletableFuture<Void> runAfterEither
648 +                (CompletableFuture<T> f,
649 +                 CompletionStage<?> g,
650 +                 java.lang.Runnable a) {
651 +                return f.runAfterEitherAsync(g, a, new ThreadExecutor());
652 +            }
653 +            public <T> CompletableFuture<Void> acceptEither
654 +                (CompletableFuture<T> f,
655 +                 CompletionStage<? extends T> g,
656 +                 Consumer<? super T> a) {
657 +                return f.acceptEitherAsync(g, a, new ThreadExecutor());
658 +            }
659 +            public <T,U> CompletableFuture<U> applyToEither
660 +                (CompletableFuture<T> f,
661 +                 CompletionStage<? extends T> g,
662 +                 Function<? super T,U> a) {
663 +                return f.applyToEitherAsync(g, a, new ThreadExecutor());
664 +            }
665 +        };
666 +
667 +        public abstract void checkExecutionMode();
668 +        public abstract <T> CompletableFuture<Void> thenRun
669 +            (CompletableFuture<T> f, Runnable a);
670 +        public abstract <T> CompletableFuture<Void> thenAccept
671 +            (CompletableFuture<T> f, Consumer<? super T> a);
672 +        public abstract <T,U> CompletableFuture<U> thenApply
673 +            (CompletableFuture<T> f, Function<? super T,U> a);
674 +        public abstract <T,U> CompletableFuture<U> thenCompose
675 +            (CompletableFuture<T> f,
676 +             Function<? super T,? extends CompletionStage<U>> a);
677 +        public abstract <T,U> CompletableFuture<U> handle
678 +            (CompletableFuture<T> f,
679 +             BiFunction<? super T,Throwable,? extends U> a);
680 +        public abstract <T> CompletableFuture<T> whenComplete
681 +            (CompletableFuture<T> f,
682 +             BiConsumer<? super T,? super Throwable> a);
683 +        public abstract <T,U> CompletableFuture<Void> runAfterBoth
684 +            (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a);
685 +        public abstract <T,U> CompletableFuture<Void> thenAcceptBoth
686 +            (CompletableFuture<T> f,
687 +             CompletionStage<? extends U> g,
688 +             BiConsumer<? super T,? super U> a);
689 +        public abstract <T,U,V> CompletableFuture<V> thenCombine
690 +            (CompletableFuture<T> f,
691 +             CompletionStage<? extends U> g,
692 +             BiFunction<? super T,? super U,? extends V> a);
693 +        public abstract <T> CompletableFuture<Void> runAfterEither
694 +            (CompletableFuture<T> f,
695 +             CompletionStage<?> g,
696 +             java.lang.Runnable a);
697 +        public abstract <T> CompletableFuture<Void> acceptEither
698 +            (CompletableFuture<T> f,
699 +             CompletionStage<? extends T> g,
700 +             Consumer<? super T> a);
701 +        public abstract <T,U> CompletableFuture<U> applyToEither
702 +            (CompletableFuture<T> f,
703 +             CompletionStage<? extends T> g,
704 +             Function<? super T,U> a);
705 +    }
706 +
707 +    /**
708 +     * exceptionally action is not invoked when source completes
709 +     * normally, and source result is propagated
710 +     */
711 +    public void testExceptionally_normalCompletion() {
712 +        for (boolean createIncomplete : new boolean[] { true, false })
713 +        for (Integer v1 : new Integer[] { 1, null })
714 +    {
715 +        final AtomicInteger a = new AtomicInteger(0);
716 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
717 +        if (!createIncomplete) f.complete(v1);
718 +        final CompletableFuture<Integer> g = f.exceptionally
719 +            ((Throwable t) -> {
720 +                // Should not be called
721 +                a.getAndIncrement();
722 +                throw new AssertionError();
723 +            });
724 +        if (createIncomplete) f.complete(v1);
725 +
726 +        checkCompletedNormally(g, v1);
727 +        checkCompletedNormally(f, v1);
728 +        assertEquals(0, a.get());
729 +    }}
730 +
731 +
732 +    /**
733 +     * exceptionally action completes with function value on source
734 +     * exception
735 +     */
736 +    public void testExceptionally_exceptionalCompletion() {
737 +        for (boolean createIncomplete : new boolean[] { true, false })
738 +        for (Integer v1 : new Integer[] { 1, null })
739 +    {
740 +        final AtomicInteger a = new AtomicInteger(0);
741 +        final CFException ex = new CFException();
742 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
743 +        if (!createIncomplete) f.completeExceptionally(ex);
744 +        final CompletableFuture<Integer> g = f.exceptionally
745 +            ((Throwable t) -> {
746 +                threadAssertSame(t, ex);
747 +                a.getAndIncrement();
748 +                return v1;
749 +            });
750 +        if (createIncomplete) f.completeExceptionally(ex);
751 +
752 +        checkCompletedNormally(g, v1);
753 +        assertEquals(1, a.get());
754 +    }}
755 +
756 +    public void testExceptionally_exceptionalCompletionActionFailed() {
757 +        for (boolean createIncomplete : new boolean[] { true, false })
758 +        for (Integer v1 : new Integer[] { 1, null })
759 +    {
760 +        final AtomicInteger a = new AtomicInteger(0);
761 +        final CFException ex1 = new CFException();
762 +        final CFException ex2 = new CFException();
763 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
764 +        if (!createIncomplete) f.completeExceptionally(ex1);
765 +        final CompletableFuture<Integer> g = f.exceptionally
766 +            ((Throwable t) -> {
767 +                threadAssertSame(t, ex1);
768 +                a.getAndIncrement();
769 +                throw ex2;
770 +            });
771 +        if (createIncomplete) f.completeExceptionally(ex1);
772 +
773 +        checkCompletedWithWrappedCFException(g, ex2);
774 +        assertEquals(1, a.get());
775 +    }}
776 +
777 +    /**
778 +     * handle action completes normally with function value on normal
779 +     * completion of source
780 +     */
781 +    public void testHandle_normalCompletion() {
782 +        for (ExecutionMode m : ExecutionMode.values())
783 +        for (boolean createIncomplete : new boolean[] { true, false })
784 +        for (Integer v1 : new Integer[] { 1, null })
785 +    {
786 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
787 +        final AtomicInteger a = new AtomicInteger(0);
788 +        if (!createIncomplete) f.complete(v1);
789 +        final CompletableFuture<Integer> g = m.handle
790 +            (f,
791 +             (Integer x, Throwable t) -> {
792 +                threadAssertSame(x, v1);
793 +                threadAssertNull(t);
794 +                a.getAndIncrement();
795 +                return inc(v1);
796 +            });
797 +        if (createIncomplete) f.complete(v1);
798 +
799 +        checkCompletedNormally(g, inc(v1));
800 +        checkCompletedNormally(f, v1);
801 +        assertEquals(1, a.get());
802 +    }}
803 +
804 +    /**
805 +     * handle action completes normally with function value on
806 +     * exceptional completion of source
807 +     */
808 +    public void testHandle_exceptionalCompletion() {
809 +        for (ExecutionMode m : ExecutionMode.values())
810 +        for (boolean createIncomplete : new boolean[] { true, false })
811 +        for (Integer v1 : new Integer[] { 1, null })
812 +    {
813 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
814 +        final AtomicInteger a = new AtomicInteger(0);
815 +        final CFException ex = new CFException();
816 +        if (!createIncomplete) f.completeExceptionally(ex);
817 +        final CompletableFuture<Integer> g = m.handle
818 +            (f,
819 +             (Integer x, Throwable t) -> {
820 +                threadAssertNull(x);
821 +                threadAssertSame(t, ex);
822 +                a.getAndIncrement();
823 +                return v1;
824 +            });
825 +        if (createIncomplete) f.completeExceptionally(ex);
826 +
827 +        checkCompletedNormally(g, v1);
828 +        checkCompletedWithWrappedCFException(f, ex);
829 +        assertEquals(1, a.get());
830 +    }}
831 +
832 +    /**
833 +     * handle action completes normally with function value on
834 +     * cancelled source
835 +     */
836 +    public void testHandle_sourceCancelled() {
837 +        for (ExecutionMode m : ExecutionMode.values())
838 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
839 +        for (boolean createIncomplete : new boolean[] { true, false })
840 +        for (Integer v1 : new Integer[] { 1, null })
841 +    {
842 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
843 +        final AtomicInteger a = new AtomicInteger(0);
844 +        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
845 +        final CompletableFuture<Integer> g = m.handle
846 +            (f,
847 +             (Integer x, Throwable t) -> {
848 +                threadAssertNull(x);
849 +                threadAssertTrue(t instanceof CancellationException);
850 +                a.getAndIncrement();
851 +                return v1;
852 +            });
853 +        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
854 +
855 +        checkCompletedNormally(g, v1);
856 +        checkCancelled(f);
857 +        assertEquals(1, a.get());
858 +    }}
859 +
860 +    /**
861 +     * handle result completes exceptionally if action does
862 +     */
863 +    public void testHandle_sourceFailedActionFailed() {
864 +        for (ExecutionMode m : ExecutionMode.values())
865 +        for (boolean createIncomplete : new boolean[] { true, false })
866 +    {
867 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
868 +        final AtomicInteger a = new AtomicInteger(0);
869 +        final CFException ex1 = new CFException();
870 +        final CFException ex2 = new CFException();
871 +        if (!createIncomplete) f.completeExceptionally(ex1);
872 +        final CompletableFuture<Integer> g = m.handle
873 +            (f,
874 +             (Integer x, Throwable t) -> {
875 +                threadAssertNull(x);
876 +                threadAssertSame(ex1, t);
877 +                a.getAndIncrement();
878 +                throw ex2;
879 +            });
880 +        if (createIncomplete) f.completeExceptionally(ex1);
881 +
882 +        checkCompletedWithWrappedCFException(g, ex2);
883 +        checkCompletedWithWrappedCFException(f, ex1);
884 +        assertEquals(1, a.get());
885 +    }}
886 +
887 +    public void testHandle_sourceCompletedNormallyActionFailed() {
888 +        for (ExecutionMode m : ExecutionMode.values())
889 +        for (boolean createIncomplete : new boolean[] { true, false })
890 +        for (Integer v1 : new Integer[] { 1, null })
891 +    {
892 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
893 +        final AtomicInteger a = new AtomicInteger(0);
894 +        final CFException ex = new CFException();
895 +        if (!createIncomplete) f.complete(v1);
896 +        final CompletableFuture<Integer> g = m.handle
897 +            (f,
898 +             (Integer x, Throwable t) -> {
899 +                threadAssertSame(x, v1);
900 +                threadAssertNull(t);
901 +                a.getAndIncrement();
902 +                throw ex;
903 +            });
904 +        if (createIncomplete) f.complete(v1);
905 +
906 +        checkCompletedWithWrappedCFException(g, ex);
907 +        checkCompletedNormally(f, v1);
908 +        assertEquals(1, a.get());
909 +    }}
910 +
911 +    /**
912 +     * runAsync completes after running Runnable
913 +     */
914 +    public void testRunAsync() {
915 +        Noop r = new Noop(ExecutionMode.ASYNC);
916 +        CompletableFuture<Void> f = CompletableFuture.runAsync(r);
917 +        assertNull(f.join());
918 +        assertEquals(1, r.invocationCount);
919 +        checkCompletedNormally(f, null);
920 +    }
921 +
922 +    /**
923 +     * runAsync with executor completes after running Runnable
924 +     */
925 +    public void testRunAsync2() {
926 +        Noop r = new Noop(ExecutionMode.EXECUTOR);
927 +        ThreadExecutor exec = new ThreadExecutor();
928 +        CompletableFuture<Void> f = CompletableFuture.runAsync(r, exec);
929 +        assertNull(f.join());
930 +        assertEquals(1, r.invocationCount);
931 +        checkCompletedNormally(f, null);
932 +        assertEquals(1, exec.count.get());
933 +    }
934 +
935 +    /**
936 +     * failing runAsync completes exceptionally after running Runnable
937 +     */
938 +    public void testRunAsync3() {
939 +        FailingRunnable r = new FailingRunnable();
940 +        CompletableFuture<Void> f = CompletableFuture.runAsync(r);
941 +        checkCompletedWithWrappedCFException(f);
942 +        assertEquals(1, r.invocationCount);
943 +    }
944 +
945 +    /**
946 +     * supplyAsync completes with result of supplier
947 +     */
948 +    public void testSupplyAsync() {
949 +        CompletableFuture<Integer> f;
950 +        f = CompletableFuture.supplyAsync(supplyOne);
951 +        assertEquals(f.join(), one);
952 +        checkCompletedNormally(f, one);
953 +    }
954 +
955 +    /**
956 +     * supplyAsync with executor completes with result of supplier
957 +     */
958 +    public void testSupplyAsync2() {
959 +        CompletableFuture<Integer> f;
960 +        f = CompletableFuture.supplyAsync(supplyOne, new ThreadExecutor());
961 +        assertEquals(f.join(), one);
962 +        checkCompletedNormally(f, one);
963 +    }
964 +
965 +    /**
966 +     * Failing supplyAsync completes exceptionally
967 +     */
968 +    public void testSupplyAsync3() {
969 +        FailingSupplier r = new FailingSupplier();
970 +        CompletableFuture<Integer> f = CompletableFuture.supplyAsync(r);
971 +        checkCompletedWithWrappedCFException(f);
972 +        assertEquals(1, r.invocationCount);
973 +    }
974 +
975 +    // seq completion methods
976 +
977 +    /**
978 +     * thenRun result completes normally after normal completion of source
979 +     */
980 +    public void testThenRun_normalCompletion() {
981 +        for (ExecutionMode m : ExecutionMode.values())
982 +        for (boolean createIncomplete : new boolean[] { true, false })
983 +        for (Integer v1 : new Integer[] { 1, null })
984 +    {
985 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
986 +        final Noop r = new Noop(m);
987 +        if (!createIncomplete) f.complete(v1);
988 +        final CompletableFuture<Void> g = m.thenRun(f, r);
989 +        if (createIncomplete) {
990 +            checkIncomplete(g);
991 +            f.complete(v1);
992 +        }
993 +
994 +        checkCompletedNormally(g, null);
995 +        checkCompletedNormally(f, v1);
996 +        assertEquals(1, r.invocationCount);
997 +    }}
998 +
999 +    /**
1000 +     * thenRun result completes exceptionally after exceptional
1001 +     * completion of source
1002 +     */
1003 +    public void testThenRun_exceptionalCompletion() {
1004 +        for (ExecutionMode m : ExecutionMode.values())
1005 +        for (boolean createIncomplete : new boolean[] { true, false })
1006 +    {
1007 +        final CFException ex = new CFException();
1008 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1009 +        final Noop r = new Noop(m);
1010 +        if (!createIncomplete) f.completeExceptionally(ex);
1011 +        final CompletableFuture<Void> g = m.thenRun(f, r);
1012 +        if (createIncomplete) {
1013 +            checkIncomplete(g);
1014 +            f.completeExceptionally(ex);
1015 +        }
1016 +
1017 +        checkCompletedWithWrappedCFException(g, ex);
1018 +        checkCompletedWithWrappedCFException(f, ex);
1019 +        assertEquals(0, r.invocationCount);
1020 +    }}
1021 +
1022 +    /**
1023 +     * thenRun result completes exceptionally if source cancelled
1024 +     */
1025 +    public void testThenRun_sourceCancelled() {
1026 +        for (ExecutionMode m : ExecutionMode.values())
1027 +        for (boolean createIncomplete : new boolean[] { true, false })
1028 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1029 +    {
1030 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1031 +        final Noop r = new Noop(m);
1032 +        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1033 +        final CompletableFuture<Void> g = f.thenRun(r);
1034 +        if (createIncomplete) {
1035 +            checkIncomplete(g);
1036 +            assertTrue(f.cancel(mayInterruptIfRunning));
1037 +        }
1038 +
1039 +        checkCompletedWithWrappedCancellationException(g);
1040 +        checkCancelled(f);
1041 +        assertEquals(0, r.invocationCount);
1042 +    }}
1043 +
1044 +    /**
1045 +     * thenRun result completes exceptionally if action does
1046 +     */
1047 +    public void testThenRun_actionFailed() {
1048 +        for (ExecutionMode m : ExecutionMode.values())
1049 +        for (boolean createIncomplete : new boolean[] { true, false })
1050 +        for (Integer v1 : new Integer[] { 1, null })
1051 +    {
1052 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1053 +        final FailingRunnable r = new FailingRunnable();
1054 +        if (!createIncomplete) f.complete(v1);
1055 +        final CompletableFuture<Void> g = f.thenRun(r);
1056 +        if (createIncomplete) {
1057 +            checkIncomplete(g);
1058 +            f.complete(v1);
1059 +        }
1060 +
1061 +        checkCompletedWithWrappedCFException(g);
1062 +        checkCompletedNormally(f, v1);
1063 +    }}
1064 +
1065 +    /**
1066 +     * thenApply result completes normally after normal completion of source
1067 +     */
1068 +    public void testThenApply_normalCompletion() {
1069 +        for (ExecutionMode m : ExecutionMode.values())
1070 +        for (boolean createIncomplete : new boolean[] { true, false })
1071 +        for (Integer v1 : new Integer[] { 1, null })
1072 +    {
1073 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1074 +        final IncFunction r = new IncFunction();
1075 +        if (!createIncomplete) f.complete(v1);
1076 +        final CompletableFuture<Integer> g = m.thenApply(f, r);
1077 +        if (createIncomplete) {
1078 +            checkIncomplete(g);
1079 +            f.complete(v1);
1080 +        }
1081 +
1082 +        checkCompletedNormally(g, inc(v1));
1083 +        checkCompletedNormally(f, v1);
1084 +        assertEquals(1, r.invocationCount);
1085 +    }}
1086 +
1087 +    /**
1088 +     * thenApply result completes exceptionally after exceptional
1089 +     * completion of source
1090 +     */
1091 +    public void testThenApply_exceptionalCompletion() {
1092 +        for (ExecutionMode m : ExecutionMode.values())
1093 +        for (boolean createIncomplete : new boolean[] { true, false })
1094 +    {
1095 +        final CFException ex = new CFException();
1096 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1097 +        final IncFunction r = new IncFunction();
1098 +        if (!createIncomplete) f.completeExceptionally(ex);
1099 +        final CompletableFuture<Integer> g = m.thenApply(f, r);
1100 +        if (createIncomplete) {
1101 +            checkIncomplete(g);
1102 +            f.completeExceptionally(ex);
1103 +        }
1104 +
1105 +        checkCompletedWithWrappedCFException(g, ex);
1106 +        checkCompletedWithWrappedCFException(f, ex);
1107 +        assertEquals(0, r.invocationCount);
1108 +    }}
1109 +
1110 +    /**
1111 +     * thenApply result completes exceptionally if source cancelled
1112 +     */
1113 +    public void testThenApply_sourceCancelled() {
1114 +        for (ExecutionMode m : ExecutionMode.values())
1115 +        for (boolean createIncomplete : new boolean[] { true, false })
1116 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1117 +    {
1118 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1119 +        final IncFunction r = new IncFunction();
1120 +        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1121 +        final CompletableFuture<Integer> g = f.thenApply(r);
1122 +        if (createIncomplete) {
1123 +            checkIncomplete(g);
1124 +            assertTrue(f.cancel(mayInterruptIfRunning));
1125 +        }
1126 +
1127 +        checkCompletedWithWrappedCancellationException(g);
1128 +        checkCancelled(f);
1129 +        assertEquals(0, r.invocationCount);
1130 +    }}
1131 +
1132 +    /**
1133 +     * thenApply result completes exceptionally if action does
1134 +     */
1135 +    public void testThenApply_actionFailed() {
1136 +        for (ExecutionMode m : ExecutionMode.values())
1137 +        for (boolean createIncomplete : new boolean[] { true, false })
1138 +        for (Integer v1 : new Integer[] { 1, null })
1139 +    {
1140 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1141 +        final FailingFunction r = new FailingFunction();
1142 +        if (!createIncomplete) f.complete(v1);
1143 +        final CompletableFuture<Integer> g = f.thenApply(r);
1144 +        if (createIncomplete) {
1145 +            checkIncomplete(g);
1146 +            f.complete(v1);
1147 +        }
1148 +
1149 +        checkCompletedWithWrappedCFException(g);
1150 +        checkCompletedNormally(f, v1);
1151 +    }}
1152 +
1153 +    /**
1154 +     * thenAccept result completes normally after normal completion of source
1155 +     */
1156 +    public void testThenAccept_normalCompletion() {
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 IncAction r = new IncAction();
1163 +        if (!createIncomplete) f.complete(v1);
1164 +        final CompletableFuture<Void> g = m.thenAccept(f, r);
1165 +        if (createIncomplete) {
1166 +            checkIncomplete(g);
1167 +            f.complete(v1);
1168 +        }
1169 +
1170 +        checkCompletedNormally(g, null);
1171 +        checkCompletedNormally(f, v1);
1172 +        assertEquals(1, r.invocationCount);
1173 +        assertEquals(inc(v1), r.value);
1174 +    }}
1175 +
1176 +    /**
1177 +     * thenAccept result completes exceptionally after exceptional
1178 +     * completion of source
1179 +     */
1180 +    public void testThenAccept_exceptionalCompletion() {
1181 +        for (ExecutionMode m : ExecutionMode.values())
1182 +        for (boolean createIncomplete : new boolean[] { true, false })
1183 +    {
1184 +        final CFException ex = new CFException();
1185 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1186 +        final IncAction r = new IncAction();
1187 +        if (!createIncomplete) f.completeExceptionally(ex);
1188 +        final CompletableFuture<Void> g = m.thenAccept(f, r);
1189 +        if (createIncomplete) {
1190 +            checkIncomplete(g);
1191 +            f.completeExceptionally(ex);
1192 +        }
1193 +
1194 +        checkCompletedWithWrappedCFException(g, ex);
1195 +        checkCompletedWithWrappedCFException(f, ex);
1196 +        assertEquals(0, r.invocationCount);
1197 +    }}
1198 +
1199 +    /**
1200 +     * thenAccept result completes exceptionally if action does
1201 +     */
1202 +    public void testThenAccept_actionFailed() {
1203 +        for (ExecutionMode m : ExecutionMode.values())
1204 +        for (boolean createIncomplete : new boolean[] { true, false })
1205 +        for (Integer v1 : new Integer[] { 1, null })
1206 +    {
1207 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1208 +        final FailingConsumer r = new FailingConsumer();
1209 +        if (!createIncomplete) f.complete(v1);
1210 +        final CompletableFuture<Void> g = f.thenAccept(r);
1211 +        if (createIncomplete) {
1212 +            checkIncomplete(g);
1213 +            f.complete(v1);
1214 +        }
1215 +
1216 +        checkCompletedWithWrappedCFException(g);
1217 +        checkCompletedNormally(f, v1);
1218 +    }}
1219 +
1220 +    /**
1221 +     * thenAccept result completes exceptionally if source cancelled
1222 +     */
1223 +    public void testThenAccept_sourceCancelled() {
1224 +        for (ExecutionMode m : ExecutionMode.values())
1225 +        for (boolean createIncomplete : new boolean[] { true, false })
1226 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1227 +    {
1228 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1229 +        final IncAction r = new IncAction();
1230 +        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1231 +        final CompletableFuture<Void> g = f.thenAccept(r);
1232 +        if (createIncomplete) {
1233 +            checkIncomplete(g);
1234 +            assertTrue(f.cancel(mayInterruptIfRunning));
1235 +        }
1236 +
1237 +        checkCompletedWithWrappedCancellationException(g);
1238 +        checkCancelled(f);
1239 +        assertEquals(0, r.invocationCount);
1240 +    }}
1241 +
1242 +    /**
1243 +     * thenCombine result completes normally after normal completion
1244 +     * of sources
1245 +     */
1246 +    public void testThenCombine_normalCompletion() {
1247 +        for (ExecutionMode m : ExecutionMode.values())
1248 +        for (boolean createIncomplete : new boolean[] { true, false })
1249 +        for (boolean fFirst : new boolean[] { true, false })
1250 +        for (Integer v1 : new Integer[] { 1, null })
1251 +        for (Integer v2 : new Integer[] { 2, null })
1252 +    {
1253 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1254 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1255 +        final SubtractFunction r = new SubtractFunction();
1256 +
1257 +        if (fFirst) f.complete(v1); else g.complete(v2);
1258 +        if (!createIncomplete)
1259 +            if (!fFirst) f.complete(v1); else g.complete(v2);
1260 +        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1261 +        if (createIncomplete) {
1262 +            checkIncomplete(h);
1263 +            assertEquals(0, r.invocationCount);
1264 +            if (!fFirst) f.complete(v1); else g.complete(v2);
1265 +        }
1266 +
1267 +        checkCompletedNormally(h, subtract(v1, v2));
1268 +        checkCompletedNormally(f, v1);
1269 +        checkCompletedNormally(g, v2);
1270 +        assertEquals(1, r.invocationCount);
1271 +    }}
1272 +
1273 +    /**
1274 +     * thenCombine result completes exceptionally after exceptional
1275 +     * completion of either source
1276 +     */
1277 +    public void testThenCombine_exceptionalCompletion() {
1278 +        for (ExecutionMode m : ExecutionMode.values())
1279 +        for (boolean createIncomplete : new boolean[] { true, false })
1280 +        for (boolean fFirst : new boolean[] { true, false })
1281 +        for (Integer v1 : new Integer[] { 1, null })
1282 +    {
1283 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1284 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1285 +        final CFException ex = new CFException();
1286 +        final SubtractFunction r = new SubtractFunction();
1287 +
1288 +        (fFirst ? f : g).complete(v1);
1289 +        if (!createIncomplete)
1290 +            (!fFirst ? f : g).completeExceptionally(ex);
1291 +        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1292 +        if (createIncomplete) {
1293 +            checkIncomplete(h);
1294 +            (!fFirst ? f : g).completeExceptionally(ex);
1295 +        }
1296 +
1297 +        checkCompletedWithWrappedCFException(h, ex);
1298 +        assertEquals(0, r.invocationCount);
1299 +        checkCompletedNormally(fFirst ? f : g, v1);
1300 +        checkCompletedWithWrappedCFException(!fFirst ? f : g, ex);
1301 +    }}
1302 +
1303 +    /**
1304 +     * thenCombine result completes exceptionally if action does
1305 +     */
1306 +    public void testThenCombine_actionFailed() {
1307 +        for (ExecutionMode m : ExecutionMode.values())
1308 +        for (boolean fFirst : new boolean[] { true, false })
1309 +        for (Integer v1 : new Integer[] { 1, null })
1310 +        for (Integer v2 : new Integer[] { 2, null })
1311 +    {
1312 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1313 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1314 +        final FailingBiFunction r = new FailingBiFunction();
1315 +        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1316 +
1317 +        if (fFirst) {
1318 +            f.complete(v1);
1319 +            g.complete(v2);
1320 +        } else {
1321 +            g.complete(v2);
1322 +            f.complete(v1);
1323 +        }
1324 +
1325 +        checkCompletedWithWrappedCFException(h);
1326 +        checkCompletedNormally(f, v1);
1327 +        checkCompletedNormally(g, v2);
1328 +    }}
1329 +
1330 +    /**
1331 +     * thenCombine result completes exceptionally if either source cancelled
1332 +     */
1333 +    public void testThenCombine_sourceCancelled() {
1334 +        for (ExecutionMode m : ExecutionMode.values())
1335 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1336 +        for (boolean createIncomplete : new boolean[] { true, false })
1337 +        for (boolean fFirst : new boolean[] { true, false })
1338 +        for (Integer v1 : new Integer[] { 1, null })
1339 +    {
1340 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1341 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1342 +        final SubtractFunction r = new SubtractFunction();
1343 +
1344 +        (fFirst ? f : g).complete(v1);
1345 +        if (!createIncomplete)
1346 +            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
1347 +        final CompletableFuture<Integer> h = m.thenCombine(f, g, r);
1348 +        if (createIncomplete) {
1349 +            checkIncomplete(h);
1350 +            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
1351 +        }
1352 +
1353 +        checkCompletedWithWrappedCancellationException(h);
1354 +        checkCancelled(!fFirst ? f : g);
1355 +        assertEquals(0, r.invocationCount);
1356 +        checkCompletedNormally(fFirst ? f : g, v1);
1357 +    }}
1358 +
1359 +    /**
1360 +     * thenAcceptBoth result completes normally after normal
1361 +     * completion of sources
1362 +     */
1363 +    public void testThenAcceptBoth_normalCompletion() {
1364 +        for (ExecutionMode m : ExecutionMode.values())
1365 +        for (boolean createIncomplete : new boolean[] { true, false })
1366 +        for (boolean fFirst : new boolean[] { true, false })
1367 +        for (Integer v1 : new Integer[] { 1, null })
1368 +        for (Integer v2 : new Integer[] { 2, null })
1369 +    {
1370 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1371 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1372 +        final SubtractAction r = new SubtractAction();
1373 +
1374 +        if (fFirst) f.complete(v1); else g.complete(v2);
1375 +        if (!createIncomplete)
1376 +            if (!fFirst) f.complete(v1); else g.complete(v2);
1377 +        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1378 +        if (createIncomplete) {
1379 +            checkIncomplete(h);
1380 +            assertEquals(0, r.invocationCount);
1381 +            if (!fFirst) f.complete(v1); else g.complete(v2);
1382 +        }
1383 +
1384 +        checkCompletedNormally(h, null);
1385 +        assertEquals(subtract(v1, v2), r.value);
1386 +        checkCompletedNormally(f, v1);
1387 +        checkCompletedNormally(g, v2);
1388 +    }}
1389 +
1390 +    /**
1391 +     * thenAcceptBoth result completes exceptionally after exceptional
1392 +     * completion of either source
1393 +     */
1394 +    public void testThenAcceptBoth_exceptionalCompletion() {
1395 +        for (ExecutionMode m : ExecutionMode.values())
1396 +        for (boolean createIncomplete : new boolean[] { true, false })
1397 +        for (boolean fFirst : new boolean[] { true, false })
1398 +        for (Integer v1 : new Integer[] { 1, null })
1399 +    {
1400 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1401 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1402 +        final CFException ex = new CFException();
1403 +        final SubtractAction r = new SubtractAction();
1404 +
1405 +        (fFirst ? f : g).complete(v1);
1406 +        if (!createIncomplete)
1407 +            (!fFirst ? f : g).completeExceptionally(ex);
1408 +        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1409 +        if (createIncomplete) {
1410 +            checkIncomplete(h);
1411 +            (!fFirst ? f : g).completeExceptionally(ex);
1412 +        }
1413 +
1414 +        checkCompletedWithWrappedCFException(h, ex);
1415 +        assertEquals(0, r.invocationCount);
1416 +        checkCompletedNormally(fFirst ? f : g, v1);
1417 +        checkCompletedWithWrappedCFException(!fFirst ? f : g, ex);
1418 +    }}
1419 +
1420 +    /**
1421 +     * thenAcceptBoth result completes exceptionally if action does
1422 +     */
1423 +    public void testThenAcceptBoth_actionFailed() {
1424 +        for (ExecutionMode m : ExecutionMode.values())
1425 +        for (boolean fFirst : new boolean[] { true, false })
1426 +        for (Integer v1 : new Integer[] { 1, null })
1427 +        for (Integer v2 : new Integer[] { 2, null })
1428 +    {
1429 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1430 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1431 +        final FailingBiConsumer r = new FailingBiConsumer();
1432 +        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1433 +
1434 +        if (fFirst) {
1435 +            f.complete(v1);
1436 +            g.complete(v2);
1437 +        } else {
1438 +            g.complete(v2);
1439 +            f.complete(v1);
1440 +        }
1441 +
1442 +        checkCompletedWithWrappedCFException(h);
1443 +        checkCompletedNormally(f, v1);
1444 +        checkCompletedNormally(g, v2);
1445 +    }}
1446 +
1447 +    /**
1448 +     * thenAcceptBoth result completes exceptionally if either source cancelled
1449 +     */
1450 +    public void testThenAcceptBoth_sourceCancelled() {
1451 +        for (ExecutionMode m : ExecutionMode.values())
1452 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1453 +        for (boolean createIncomplete : new boolean[] { true, false })
1454 +        for (boolean fFirst : new boolean[] { true, false })
1455 +        for (Integer v1 : new Integer[] { 1, null })
1456 +    {
1457 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1458 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1459 +        final SubtractAction r = new SubtractAction();
1460 +
1461 +        (fFirst ? f : g).complete(v1);
1462 +        if (!createIncomplete)
1463 +            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
1464 +        final CompletableFuture<Void> h = m.thenAcceptBoth(f, g, r);
1465 +        if (createIncomplete) {
1466 +            checkIncomplete(h);
1467 +            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
1468 +        }
1469 +
1470 +        checkCompletedWithWrappedCancellationException(h);
1471 +        checkCancelled(!fFirst ? f : g);
1472 +        assertEquals(0, r.invocationCount);
1473 +        checkCompletedNormally(fFirst ? f : g, v1);
1474 +    }}
1475 +
1476 +    /**
1477 +     * runAfterBoth result completes normally after normal
1478 +     * completion of sources
1479 +     */
1480 +    public void testRunAfterBoth_normalCompletion() {
1481 +        for (ExecutionMode m : ExecutionMode.values())
1482 +        for (boolean createIncomplete : new boolean[] { true, false })
1483 +        for (boolean fFirst : new boolean[] { true, false })
1484 +        for (Integer v1 : new Integer[] { 1, null })
1485 +        for (Integer v2 : new Integer[] { 2, null })
1486 +    {
1487 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1488 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1489 +        final Noop r = new Noop(m);
1490 +
1491 +        if (fFirst) f.complete(v1); else g.complete(v2);
1492 +        if (!createIncomplete)
1493 +            if (!fFirst) f.complete(v1); else g.complete(v2);
1494 +        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1495 +        if (createIncomplete) {
1496 +            checkIncomplete(h);
1497 +            assertEquals(0, r.invocationCount);
1498 +            if (!fFirst) f.complete(v1); else g.complete(v2);
1499 +        }
1500 +
1501 +        checkCompletedNormally(h, null);
1502 +        assertEquals(1, r.invocationCount);
1503 +        checkCompletedNormally(f, v1);
1504 +        checkCompletedNormally(g, v2);
1505 +    }}
1506 +
1507 +    /**
1508 +     * runAfterBoth result completes exceptionally after exceptional
1509 +     * completion of either source
1510 +     */
1511 +    public void testRunAfterBoth_exceptionalCompletion() {
1512 +        for (ExecutionMode m : ExecutionMode.values())
1513 +        for (boolean createIncomplete : new boolean[] { true, false })
1514 +        for (boolean fFirst : new boolean[] { true, false })
1515 +        for (Integer v1 : new Integer[] { 1, null })
1516 +    {
1517 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1518 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1519 +        final CFException ex = new CFException();
1520 +        final Noop r = new Noop(m);
1521 +
1522 +        (fFirst ? f : g).complete(v1);
1523 +        if (!createIncomplete)
1524 +            (!fFirst ? f : g).completeExceptionally(ex);
1525 +        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1526 +        if (createIncomplete) {
1527 +            checkIncomplete(h);
1528 +            (!fFirst ? f : g).completeExceptionally(ex);
1529 +        }
1530 +
1531 +        checkCompletedWithWrappedCFException(h, ex);
1532 +        assertEquals(0, r.invocationCount);
1533 +        checkCompletedNormally(fFirst ? f : g, v1);
1534 +        checkCompletedWithWrappedCFException(!fFirst ? f : g, ex);
1535 +    }}
1536 +
1537 +    /**
1538 +     * runAfterBoth result completes exceptionally if action does
1539 +     */
1540 +    public void testRunAfterBoth_actionFailed() {
1541 +        for (ExecutionMode m : ExecutionMode.values())
1542 +        for (boolean fFirst : new boolean[] { true, false })
1543 +        for (Integer v1 : new Integer[] { 1, null })
1544 +        for (Integer v2 : new Integer[] { 2, null })
1545 +    {
1546 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1547 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1548 +        final FailingRunnable r = new FailingRunnable();
1549 +
1550 +        CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r);
1551 +        if (fFirst) {
1552 +            f.complete(v1);
1553 +            g.complete(v2);
1554 +        } else {
1555 +            g.complete(v2);
1556 +            f.complete(v1);
1557 +        }
1558 +        CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r);
1559 +
1560 +        checkCompletedWithWrappedCFException(h1);
1561 +        checkCompletedWithWrappedCFException(h2);
1562 +        checkCompletedNormally(f, v1);
1563 +        checkCompletedNormally(g, v2);
1564 +    }}
1565 +
1566 +    /**
1567 +     * runAfterBoth result completes exceptionally if either source cancelled
1568 +     */
1569 +    public void testRunAfterBoth_sourceCancelled() {
1570 +        for (ExecutionMode m : ExecutionMode.values())
1571 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1572 +        for (boolean createIncomplete : new boolean[] { true, false })
1573 +        for (boolean fFirst : new boolean[] { true, false })
1574 +        for (Integer v1 : new Integer[] { 1, null })
1575 +    {
1576 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1577 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1578 +        final Noop r = new Noop(m);
1579 +
1580 +
1581 +        (fFirst ? f : g).complete(v1);
1582 +        if (!createIncomplete)
1583 +            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
1584 +        final CompletableFuture<Void> h = m.runAfterBoth(f, g, r);
1585 +        if (createIncomplete) {
1586 +            checkIncomplete(h);
1587 +            assertTrue((!fFirst ? f : g).cancel(mayInterruptIfRunning));
1588 +        }
1589 +
1590 +        checkCompletedWithWrappedCancellationException(h);
1591 +        checkCancelled(!fFirst ? f : g);
1592 +        assertEquals(0, r.invocationCount);
1593 +        checkCompletedNormally(fFirst ? f : g, v1);
1594 +    }}
1595 +
1596 +    /**
1597 +     * applyToEither result completes normally after normal completion
1598 +     * of either source
1599 +     */
1600 +    public void testApplyToEither_normalCompletion() {
1601 +        for (ExecutionMode m : ExecutionMode.values())
1602 +        for (boolean createIncomplete : new boolean[] { true, false })
1603 +        for (boolean fFirst : new boolean[] { true, false })
1604 +        for (Integer v1 : new Integer[] { 1, null })
1605 +        for (Integer v2 : new Integer[] { 2, null })
1606 +    {
1607 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1608 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1609 +        final IncFunction r = new IncFunction();
1610 +
1611 +        if (!createIncomplete)
1612 +            if (fFirst) f.complete(v1); else g.complete(v2);
1613 +        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
1614 +        if (createIncomplete) {
1615 +            checkIncomplete(h);
1616 +            assertEquals(0, r.invocationCount);
1617 +            if (fFirst) f.complete(v1); else g.complete(v2);
1618 +        }
1619 +        checkCompletedNormally(h, inc(fFirst ? v1 : v2));
1620 +        if (!fFirst) f.complete(v1); else g.complete(v2);
1621 +
1622 +        checkCompletedNormally(f, v1);
1623 +        checkCompletedNormally(g, v2);
1624 +        checkCompletedNormally(h, inc(fFirst ? v1 : v2));
1625 +    }}
1626 +
1627 +    public void testApplyToEither_normalCompletionBothAvailable() {
1628 +        for (ExecutionMode m : ExecutionMode.values())
1629 +        for (boolean fFirst : new boolean[] { true, false })
1630 +        for (Integer v1 : new Integer[] { 1, null })
1631 +        for (Integer v2 : new Integer[] { 2, null })
1632 +    {
1633 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1634 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1635 +        final IncFunction r = new IncFunction();
1636 +
1637 +        if (fFirst) {
1638 +            f.complete(v1);
1639 +            g.complete(v2);
1640 +        } else {
1641 +            g.complete(v2);
1642 +            f.complete(v1);
1643 +        }
1644 +
1645 +        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
1646 +
1647 +        checkCompletedNormally(f, v1);
1648 +        checkCompletedNormally(g, v2);
1649 +
1650 +        // unspecified behavior
1651 +        assertTrue(Objects.equals(h.join(), inc(v1)) ||
1652 +                   Objects.equals(h.join(), inc(v2)));
1653 +        assertEquals(1, r.invocationCount);
1654 +    }}
1655 +
1656 +    /**
1657 +     * applyToEither result completes exceptionally after exceptional
1658 +     * completion of either source
1659 +     */
1660 +    public void testApplyToEither_exceptionalCompletion1() {
1661 +        for (ExecutionMode m : ExecutionMode.values())
1662 +        for (boolean createIncomplete : new boolean[] { true, false })
1663 +        for (boolean fFirst : new boolean[] { true, false })
1664 +        for (Integer v1 : new Integer[] { 1, null })
1665 +    {
1666 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1667 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1668 +        final CFException ex = new CFException();
1669 +        final IncFunction r = new IncFunction();
1670 +
1671 +        if (!createIncomplete) (fFirst ? f : g).completeExceptionally(ex);
1672 +        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
1673 +        if (createIncomplete) {
1674 +            checkIncomplete(h);
1675 +            assertEquals(0, r.invocationCount);
1676 +            (fFirst ? f : g).completeExceptionally(ex);
1677 +        }
1678 +
1679 +        checkCompletedWithWrappedCFException(h, ex);
1680 +        (!fFirst ? f : g).complete(v1);
1681 +
1682 +        assertEquals(0, r.invocationCount);
1683 +        checkCompletedNormally(!fFirst ? f : g, v1);
1684 +        checkCompletedWithWrappedCFException(fFirst ? f : g, ex);
1685 +        checkCompletedWithWrappedCFException(h, ex);
1686 +    }}
1687 +
1688 +    public void testApplyToEither_exceptionalCompletion2() {
1689 +        for (ExecutionMode m : ExecutionMode.values())
1690 +        for (boolean reverseArgs : new boolean[] { true, false })
1691 +        for (boolean fFirst : new boolean[] { true, false })
1692 +        for (Integer v1 : new Integer[] { 1, null })
1693 +    {
1694 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1695 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1696 +        final IncFunction r1 = new IncFunction();
1697 +        final IncFunction r2 = new IncFunction();
1698 +        final CFException ex = new CFException();
1699 +        final CompletableFuture<Integer> j = (reverseArgs ? g : f);
1700 +        final CompletableFuture<Integer> k = (reverseArgs ? f : g);
1701 +        final CompletableFuture<Integer> h1 = m.applyToEither(j, k, r1);
1702 +        if (fFirst) {
1703 +            f.complete(v1);
1704 +            g.completeExceptionally(ex);
1705 +        } else {
1706 +            g.completeExceptionally(ex);
1707 +            f.complete(v1);
1708 +        }
1709 +        final CompletableFuture<Integer> h2 = m.applyToEither(j, k, r2);
1710 +
1711 +        // unspecified behavior
1712 +        try {
1713 +            assertEquals(inc(v1), h1.join());
1714 +            assertEquals(1, r1.invocationCount);
1715 +        } catch (CompletionException ok) {
1716 +            checkCompletedWithWrappedCFException(h1, ex);
1717 +            assertEquals(0, r1.invocationCount);
1718 +        }
1719 +
1720 +        try {
1721 +            assertEquals(inc(v1), h2.join());
1722 +            assertEquals(1, r2.invocationCount);
1723 +        } catch (CompletionException ok) {
1724 +            checkCompletedWithWrappedCFException(h2, ex);
1725 +            assertEquals(0, r2.invocationCount);
1726 +        }
1727 +
1728 +        checkCompletedWithWrappedCFException(g, ex);
1729 +        checkCompletedNormally(f, v1);
1730 +    }}
1731 +
1732 +    /**
1733 +     * applyToEither result completes exceptionally if action does
1734 +     */
1735 +    public void testApplyToEither_actionFailed1() {
1736 +        for (ExecutionMode m : ExecutionMode.values())
1737 +        for (Integer v1 : new Integer[] { 1, null })
1738 +        for (Integer v2 : new Integer[] { 2, null })
1739 +    {
1740 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1741 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1742 +        final FailingFunction r = new FailingFunction();
1743 +        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
1744 +
1745 +        f.complete(v1);
1746 +        checkCompletedWithWrappedCFException(h);
1747 +        g.complete(v2);
1748 +        checkCompletedNormally(f, v1);
1749 +        checkCompletedNormally(g, v2);
1750 +    }}
1751 +
1752 +    public void testApplyToEither_actionFailed2() {
1753 +        for (ExecutionMode m : ExecutionMode.values())
1754 +        for (Integer v1 : new Integer[] { 1, null })
1755 +        for (Integer v2 : new Integer[] { 2, null })
1756 +    {
1757 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1758 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1759 +        final FailingFunction r = new FailingFunction();
1760 +        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
1761 +
1762 +        g.complete(v2);
1763 +        checkCompletedWithWrappedCFException(h);
1764 +        f.complete(v1);
1765 +        checkCompletedNormally(f, v1);
1766 +        checkCompletedNormally(g, v2);
1767 +    }}
1768 +
1769 +    /**
1770 +     * applyToEither result completes exceptionally if either source cancelled
1771 +     */
1772 +    public void testApplyToEither_sourceCancelled1() {
1773 +        for (ExecutionMode m : ExecutionMode.values())
1774 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1775 +        for (boolean createIncomplete : new boolean[] { true, false })
1776 +        for (boolean fFirst : new boolean[] { true, false })
1777 +        for (Integer v1 : new Integer[] { 1, null })
1778 +    {
1779 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1780 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1781 +        final IncFunction r = new IncFunction();
1782 +
1783 +        if (!createIncomplete) assertTrue((fFirst ? f : g).cancel(mayInterruptIfRunning));
1784 +        final CompletableFuture<Integer> h = m.applyToEither(f, g, r);
1785 +        if (createIncomplete) {
1786 +            checkIncomplete(h);
1787 +            assertEquals(0, r.invocationCount);
1788 +            assertTrue((fFirst ? f : g).cancel(mayInterruptIfRunning));
1789 +        }
1790 +
1791 +        checkCompletedWithWrappedCancellationException(h);
1792 +        (!fFirst ? f : g).complete(v1);
1793 +
1794 +        assertEquals(0, r.invocationCount);
1795 +        checkCompletedNormally(!fFirst ? f : g, v1);
1796 +        checkCancelled(fFirst ? f : g);
1797 +        checkCompletedWithWrappedCancellationException(h);
1798 +    }}
1799 +
1800 +    public void testApplyToEither_sourceCancelled2() {
1801 +        for (ExecutionMode m : ExecutionMode.values())
1802 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1803 +        for (boolean reverseArgs : new boolean[] { true, false })
1804 +        for (boolean fFirst : new boolean[] { true, false })
1805 +        for (Integer v1 : new Integer[] { 1, null })
1806 +    {
1807 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1808 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1809 +        final IncFunction r1 = new IncFunction();
1810 +        final IncFunction r2 = new IncFunction();
1811 +        final CFException ex = new CFException();
1812 +        final CompletableFuture<Integer> j = (reverseArgs ? g : f);
1813 +        final CompletableFuture<Integer> k = (reverseArgs ? f : g);
1814 +
1815 +        final CompletableFuture<Integer> h1 = m.applyToEither(j, k, r1);
1816 +        if (fFirst) {
1817 +            f.complete(v1);
1818 +            assertTrue(g.cancel(mayInterruptIfRunning));
1819 +        } else {
1820 +            assertTrue(g.cancel(mayInterruptIfRunning));
1821 +            f.complete(v1);
1822 +        }
1823 +        final CompletableFuture<Integer> h2 = m.applyToEither(j, k, r2);
1824 +
1825 +        // unspecified behavior
1826 +        try {
1827 +            assertEquals(inc(v1), h1.join());
1828 +            assertEquals(1, r1.invocationCount);
1829 +        } catch (CompletionException ok) {
1830 +            checkCompletedWithWrappedCancellationException(h1);
1831 +            assertEquals(0, r1.invocationCount);
1832 +        }
1833 +
1834 +        try {
1835 +            assertEquals(inc(v1), h2.join());
1836 +            assertEquals(1, r2.invocationCount);
1837 +        } catch (CompletionException ok) {
1838 +            checkCompletedWithWrappedCancellationException(h2);
1839 +            assertEquals(0, r2.invocationCount);
1840 +        }
1841 +
1842 +        checkCancelled(g);
1843 +        checkCompletedNormally(f, v1);
1844 +    }}
1845 +
1846 +    /**
1847 +     * acceptEither result completes normally after normal completion
1848 +     * of either source
1849 +     */
1850 +    public void testAcceptEither_normalCompletion1() {
1851 +        for (ExecutionMode m : ExecutionMode.values())
1852 +        for (Integer v1 : new Integer[] { 1, null })
1853 +        for (Integer v2 : new Integer[] { 2, null })
1854 +    {
1855 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1856 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1857 +        final IncAction r = new IncAction();
1858 +        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
1859 +
1860 +        f.complete(v1);
1861 +        checkCompletedNormally(h, null);
1862 +        assertEquals(inc(v1), r.value);
1863 +        g.complete(v2);
1864 +
1865 +        checkCompletedNormally(f, v1);
1866 +        checkCompletedNormally(g, v2);
1867 +        checkCompletedNormally(h, null);
1868 +    }}
1869 +
1870 +    public void testAcceptEither_normalCompletion2() {
1871 +        for (ExecutionMode m : ExecutionMode.values())
1872 +        for (Integer v1 : new Integer[] { 1, null })
1873 +        for (Integer v2 : new Integer[] { 2, null })
1874 +    {
1875 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1876 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1877 +        final IncAction r = new IncAction();
1878 +        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
1879 +
1880 +        g.complete(v2);
1881 +        checkCompletedNormally(h, null);
1882 +        assertEquals(inc(v2), r.value);
1883 +        f.complete(v1);
1884 +
1885 +        checkCompletedNormally(f, v1);
1886 +        checkCompletedNormally(g, v2);
1887 +        checkCompletedNormally(h, null);
1888 +    }}
1889 +
1890 +    public void testAcceptEither_normalCompletion3() {
1891 +        for (ExecutionMode m : ExecutionMode.values())
1892 +        for (Integer v1 : new Integer[] { 1, null })
1893 +        for (Integer v2 : new Integer[] { 2, null })
1894 +    {
1895 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1896 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1897 +        final IncAction r = new IncAction();
1898 +
1899 +        f.complete(v1);
1900 +        g.complete(v2);
1901 +        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
1902 +
1903 +        checkCompletedNormally(h, null);
1904 +        checkCompletedNormally(f, v1);
1905 +        checkCompletedNormally(g, v2);
1906 +
1907 +        // unspecified behavior
1908 +        assertTrue(Objects.equals(r.value, inc(v1)) ||
1909 +                   Objects.equals(r.value, inc(v2)));
1910 +    }}
1911 +
1912 +    /**
1913 +     * acceptEither result completes exceptionally after exceptional
1914 +     * completion of either source
1915 +     */
1916 +    public void testAcceptEither_exceptionalCompletion1() {
1917 +        for (ExecutionMode m : ExecutionMode.values())
1918 +        for (Integer v1 : new Integer[] { 1, null })
1919 +    {
1920 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1921 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1922 +        final IncAction r = new IncAction();
1923 +        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
1924 +        final CFException ex = new CFException();
1925 +
1926 +        f.completeExceptionally(ex);
1927 +        checkCompletedWithWrappedCFException(h, ex);
1928 +        g.complete(v1);
1929 +
1930 +        assertEquals(0, r.invocationCount);
1931 +        checkCompletedNormally(g, v1);
1932 +        checkCompletedWithWrappedCFException(f, ex);
1933 +        checkCompletedWithWrappedCFException(h, ex);
1934 +    }}
1935 +
1936 +    public void testAcceptEither_exceptionalCompletion2() {
1937 +        for (ExecutionMode m : ExecutionMode.values())
1938 +        for (Integer v1 : new Integer[] { 1, null })
1939 +    {
1940 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1941 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1942 +        final IncAction r = new IncAction();
1943 +        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
1944 +        final CFException ex = new CFException();
1945 +
1946 +        g.completeExceptionally(ex);
1947 +        checkCompletedWithWrappedCFException(h, ex);
1948 +        f.complete(v1);
1949 +
1950 +        assertEquals(0, r.invocationCount);
1951 +        checkCompletedNormally(f, v1);
1952 +        checkCompletedWithWrappedCFException(g, ex);
1953 +        checkCompletedWithWrappedCFException(h, ex);
1954 +    }}
1955 +
1956 +    public void testAcceptEither_exceptionalCompletion3() {
1957 +        for (ExecutionMode m : ExecutionMode.values())
1958 +        for (Integer v1 : new Integer[] { 1, null })
1959 +    {
1960 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1961 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1962 +        final IncAction r = new IncAction();
1963 +        final CFException ex = new CFException();
1964 +
1965 +        g.completeExceptionally(ex);
1966 +        f.complete(v1);
1967 +        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
1968 +
1969 +        // unspecified behavior
1970 +        Integer v;
1971 +        try {
1972 +            assertNull(h.join());
1973 +            assertEquals(1, r.invocationCount);
1974 +            assertEquals(inc(v1), r.value);
1975 +        } catch (CompletionException ok) {
1976 +            checkCompletedWithWrappedCFException(h, ex);
1977 +            assertEquals(0, r.invocationCount);
1978 +        }
1979 +
1980 +        checkCompletedWithWrappedCFException(g, ex);
1981 +        checkCompletedNormally(f, v1);
1982 +    }}
1983 +
1984 +    public void testAcceptEither_exceptionalCompletion4() {
1985 +        for (ExecutionMode m : ExecutionMode.values())
1986 +        for (Integer v1 : new Integer[] { 1, null })
1987 +    {
1988 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1989 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1990 +        final IncAction r = new IncAction();
1991 +        final CFException ex = new CFException();
1992 +
1993 +        f.completeExceptionally(ex);
1994 +        g.complete(v1);
1995 +        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
1996 +
1997 +        // unspecified behavior
1998 +        Integer v;
1999 +        try {
2000 +            assertNull(h.join());
2001 +            assertEquals(1, r.invocationCount);
2002 +            assertEquals(inc(v1), r.value);
2003 +        } catch (CompletionException ok) {
2004 +            checkCompletedWithWrappedCFException(h, ex);
2005 +            assertEquals(0, r.invocationCount);
2006 +        }
2007 +
2008 +        checkCompletedWithWrappedCFException(f, ex);
2009 +        checkCompletedNormally(g, v1);
2010 +    }}
2011 +
2012 +    /**
2013 +     * acceptEither result completes exceptionally if action does
2014 +     */
2015 +    public void testAcceptEither_actionFailed1() {
2016 +        for (ExecutionMode m : ExecutionMode.values())
2017 +        for (Integer v1 : new Integer[] { 1, null })
2018 +        for (Integer v2 : new Integer[] { 2, null })
2019 +    {
2020 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2021 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2022 +        final FailingConsumer r = new FailingConsumer();
2023 +        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2024 +
2025 +        f.complete(v1);
2026 +        checkCompletedWithWrappedCFException(h);
2027 +        g.complete(v2);
2028 +        checkCompletedNormally(f, v1);
2029 +        checkCompletedNormally(g, v2);
2030 +    }}
2031 +
2032 +    public void testAcceptEither_actionFailed2() {
2033 +        for (ExecutionMode m : ExecutionMode.values())
2034 +        for (Integer v1 : new Integer[] { 1, null })
2035 +        for (Integer v2 : new Integer[] { 2, null })
2036 +    {
2037 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2038 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2039 +        final FailingConsumer r = new FailingConsumer();
2040 +        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2041 +
2042 +        g.complete(v2);
2043 +        checkCompletedWithWrappedCFException(h);
2044 +        f.complete(v1);
2045 +        checkCompletedNormally(f, v1);
2046 +        checkCompletedNormally(g, v2);
2047 +    }}
2048 +
2049 +    /**
2050 +     * acceptEither result completes exceptionally if either source cancelled
2051 +     */
2052 +    public void testAcceptEither_sourceCancelled1() {
2053 +        for (ExecutionMode m : ExecutionMode.values())
2054 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2055 +        for (Integer v1 : new Integer[] { 1, null })
2056 +    {
2057 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2058 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2059 +        final IncAction r = new IncAction();
2060 +        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2061 +
2062 +        assertTrue(f.cancel(mayInterruptIfRunning));
2063 +        checkCompletedWithWrappedCancellationException(h);
2064 +        g.complete(v1);
2065 +
2066 +        checkCancelled(f);
2067 +        assertEquals(0, r.invocationCount);
2068 +        checkCompletedNormally(g, v1);
2069 +        checkCompletedWithWrappedCancellationException(h);
2070 +    }}
2071 +
2072 +    public void testAcceptEither_sourceCancelled2() {
2073 +        for (ExecutionMode m : ExecutionMode.values())
2074 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2075 +        for (Integer v1 : new Integer[] { 1, null })
2076 +    {
2077 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2078 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2079 +        final IncAction r = new IncAction();
2080 +        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2081 +
2082 +        assertTrue(g.cancel(mayInterruptIfRunning));
2083 +        checkCompletedWithWrappedCancellationException(h);
2084 +        f.complete(v1);
2085 +
2086 +        checkCancelled(g);
2087 +        assertEquals(0, r.invocationCount);
2088 +        checkCompletedNormally(f, v1);
2089 +        checkCompletedWithWrappedCancellationException(h);
2090 +    }}
2091 +
2092 +    public void testAcceptEither_sourceCancelled3() {
2093 +        for (ExecutionMode m : ExecutionMode.values())
2094 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2095 +        for (Integer v1 : new Integer[] { 1, null })
2096 +    {
2097 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2098 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2099 +        final IncAction r = new IncAction();
2100 +
2101 +        assertTrue(g.cancel(mayInterruptIfRunning));
2102 +        f.complete(v1);
2103 +        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2104 +
2105 +        // unspecified behavior
2106 +        Integer v;
2107 +        try {
2108 +            assertNull(h.join());
2109 +            assertEquals(1, r.invocationCount);
2110 +            assertEquals(inc(v1), r.value);
2111 +        } catch (CompletionException ok) {
2112 +            checkCompletedWithWrappedCancellationException(h);
2113 +            assertEquals(0, r.invocationCount);
2114 +        }
2115 +
2116 +        checkCancelled(g);
2117 +        checkCompletedNormally(f, v1);
2118 +    }}
2119 +
2120 +    public void testAcceptEither_sourceCancelled4() {
2121 +        for (ExecutionMode m : ExecutionMode.values())
2122 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2123 +        for (Integer v1 : new Integer[] { 1, null })
2124 +    {
2125 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2126 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2127 +        final IncAction r = new IncAction();
2128 +
2129 +        assertTrue(f.cancel(mayInterruptIfRunning));
2130 +        g.complete(v1);
2131 +        final CompletableFuture<Void> h = m.acceptEither(f, g, r);
2132 +
2133 +        // unspecified behavior
2134 +        Integer v;
2135 +        try {
2136 +            assertNull(h.join());
2137 +            assertEquals(1, r.invocationCount);
2138 +            assertEquals(inc(v1), r.value);
2139 +        } catch (CompletionException ok) {
2140 +            checkCompletedWithWrappedCancellationException(h);
2141 +            assertEquals(0, r.invocationCount);
2142 +        }
2143 +
2144 +        checkCancelled(f);
2145 +        checkCompletedNormally(g, v1);
2146 +    }}
2147 +
2148 +    /**
2149 +     * runAfterEither result completes normally after normal completion
2150 +     * of either source
2151 +     */
2152 +    public void testRunAfterEither_normalCompletion1() {
2153 +        for (ExecutionMode m : ExecutionMode.values())
2154 +        for (Integer v1 : new Integer[] { 1, null })
2155 +        for (Integer v2 : new Integer[] { 2, null })
2156 +    {
2157 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2158 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2159 +        final Noop r = new Noop(m);
2160 +        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2161 +
2162 +        f.complete(v1);
2163 +        checkCompletedNormally(h, null);
2164 +        assertEquals(1, r.invocationCount);
2165 +        g.complete(v2);
2166 +
2167 +        checkCompletedNormally(f, v1);
2168 +        checkCompletedNormally(g, v2);
2169 +        checkCompletedNormally(h, null);
2170 +        assertEquals(1, r.invocationCount);
2171 +    }}
2172 +
2173 +    public void testRunAfterEither_normalCompletion2() {
2174 +        for (ExecutionMode m : ExecutionMode.values())
2175 +        for (Integer v1 : new Integer[] { 1, null })
2176 +        for (Integer v2 : new Integer[] { 2, null })
2177 +    {
2178 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2179 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2180 +        final Noop r = new Noop(m);
2181 +        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2182 +
2183 +        g.complete(v2);
2184 +        checkCompletedNormally(h, null);
2185 +        assertEquals(1, r.invocationCount);
2186 +        f.complete(v1);
2187 +
2188 +        checkCompletedNormally(f, v1);
2189 +        checkCompletedNormally(g, v2);
2190 +        checkCompletedNormally(h, null);
2191 +        assertEquals(1, r.invocationCount);
2192 +        }}
2193 +
2194 +    public void testRunAfterEither_normalCompletion3() {
2195 +        for (ExecutionMode m : ExecutionMode.values())
2196 +        for (Integer v1 : new Integer[] { 1, null })
2197 +        for (Integer v2 : new Integer[] { 2, null })
2198 +    {
2199 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2200 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2201 +        final Noop r = new Noop(m);
2202 +
2203 +        f.complete(v1);
2204 +        g.complete(v2);
2205 +        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2206 +
2207 +        checkCompletedNormally(h, null);
2208 +        checkCompletedNormally(f, v1);
2209 +        checkCompletedNormally(g, v2);
2210 +        assertEquals(1, r.invocationCount);
2211 +    }}
2212 +
2213 +    /**
2214 +     * runAfterEither result completes exceptionally after exceptional
2215 +     * completion of either source
2216 +     */
2217 +    public void testRunAfterEither_exceptionalCompletion1() {
2218 +        for (ExecutionMode m : ExecutionMode.values())
2219 +        for (Integer v1 : new Integer[] { 1, null })
2220 +    {
2221 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2222 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2223 +        final Noop r = new Noop(m);
2224 +        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2225 +        final CFException ex = new CFException();
2226 +
2227 +        f.completeExceptionally(ex);
2228 +        checkCompletedWithWrappedCFException(h, ex);
2229 +        g.complete(v1);
2230 +
2231 +        assertEquals(0, r.invocationCount);
2232 +        checkCompletedNormally(g, v1);
2233 +        checkCompletedWithWrappedCFException(f, ex);
2234 +        checkCompletedWithWrappedCFException(h, ex);
2235 +    }}
2236 +
2237 +    public void testRunAfterEither_exceptionalCompletion2() {
2238 +        for (ExecutionMode m : ExecutionMode.values())
2239 +        for (Integer v1 : new Integer[] { 1, null })
2240 +    {
2241 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2242 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2243 +        final Noop r = new Noop(m);
2244 +        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2245 +        final CFException ex = new CFException();
2246 +
2247 +        g.completeExceptionally(ex);
2248 +        checkCompletedWithWrappedCFException(h, ex);
2249 +        f.complete(v1);
2250 +
2251 +        assertEquals(0, r.invocationCount);
2252 +        checkCompletedNormally(f, v1);
2253 +        checkCompletedWithWrappedCFException(g, ex);
2254 +        checkCompletedWithWrappedCFException(h, ex);
2255 +    }}
2256 +
2257 +    public void testRunAfterEither_exceptionalCompletion3() {
2258 +        for (ExecutionMode m : ExecutionMode.values())
2259 +        for (Integer v1 : new Integer[] { 1, null })
2260 +    {
2261 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2262 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2263 +        final Noop r = new Noop(m);
2264 +        final CFException ex = new CFException();
2265 +
2266 +        g.completeExceptionally(ex);
2267 +        f.complete(v1);
2268 +        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2269 +
2270 +        // unspecified behavior
2271 +        Integer v;
2272 +        try {
2273 +            assertNull(h.join());
2274 +            assertEquals(1, r.invocationCount);
2275 +        } catch (CompletionException ok) {
2276 +            checkCompletedWithWrappedCFException(h, ex);
2277 +            assertEquals(0, r.invocationCount);
2278 +        }
2279 +
2280 +        checkCompletedWithWrappedCFException(g, ex);
2281 +        checkCompletedNormally(f, v1);
2282 +    }}
2283 +
2284 +    public void testRunAfterEither_exceptionalCompletion4() {
2285 +        for (ExecutionMode m : ExecutionMode.values())
2286 +        for (Integer v1 : new Integer[] { 1, null })
2287 +    {
2288 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2289 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2290 +        final Noop r = new Noop(m);
2291 +        final CFException ex = new CFException();
2292 +
2293 +        f.completeExceptionally(ex);
2294 +        g.complete(v1);
2295 +        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2296 +
2297 +        // unspecified behavior
2298 +        Integer v;
2299 +        try {
2300 +            assertNull(h.join());
2301 +            assertEquals(1, r.invocationCount);
2302 +        } catch (CompletionException ok) {
2303 +            checkCompletedWithWrappedCFException(h, ex);
2304 +            assertEquals(0, r.invocationCount);
2305 +        }
2306 +
2307 +        checkCompletedWithWrappedCFException(f, ex);
2308 +        checkCompletedNormally(g, v1);
2309 +    }}
2310 +
2311 +    /**
2312 +     * runAfterEither result completes exceptionally if action does
2313 +     */
2314 +    public void testRunAfterEither_actionFailed1() {
2315 +        for (ExecutionMode m : ExecutionMode.values())
2316 +        for (Integer v1 : new Integer[] { 1, null })
2317 +        for (Integer v2 : new Integer[] { 2, null })
2318 +    {
2319 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2320 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2321 +        final FailingRunnable r = new FailingRunnable();
2322 +        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2323 +
2324 +        f.complete(v1);
2325 +        checkCompletedWithWrappedCFException(h);
2326 +        g.complete(v2);
2327 +        checkCompletedNormally(f, v1);
2328 +        checkCompletedNormally(g, v2);
2329 +    }}
2330 +
2331 +    public void testRunAfterEither_actionFailed2() {
2332 +        for (ExecutionMode m : ExecutionMode.values())
2333 +        for (Integer v1 : new Integer[] { 1, null })
2334 +        for (Integer v2 : new Integer[] { 2, null })
2335 +    {
2336 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2337 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2338 +        final FailingRunnable r = new FailingRunnable();
2339 +        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2340 +
2341 +        g.complete(v2);
2342 +        checkCompletedWithWrappedCFException(h);
2343 +        f.complete(v1);
2344 +        checkCompletedNormally(f, v1);
2345 +        checkCompletedNormally(g, v2);
2346 +    }}
2347 +
2348 +    /**
2349 +     * runAfterEither result completes exceptionally if either source cancelled
2350 +     */
2351 +    public void testRunAfterEither_sourceCancelled1() {
2352 +        for (ExecutionMode m : ExecutionMode.values())
2353 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2354 +        for (Integer v1 : new Integer[] { 1, null })
2355 +    {
2356 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2357 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2358 +        final Noop r = new Noop(m);
2359 +        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2360 +
2361 +        assertTrue(f.cancel(mayInterruptIfRunning));
2362 +        checkCompletedWithWrappedCancellationException(h);
2363 +        g.complete(v1);
2364 +
2365 +        checkCancelled(f);
2366 +        assertEquals(0, r.invocationCount);
2367 +        checkCompletedNormally(g, v1);
2368 +        checkCompletedWithWrappedCancellationException(h);
2369 +    }}
2370 +
2371 +    public void testRunAfterEither_sourceCancelled2() {
2372 +        for (ExecutionMode m : ExecutionMode.values())
2373 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2374 +        for (Integer v1 : new Integer[] { 1, null })
2375 +    {
2376 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2377 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2378 +        final Noop r = new Noop(m);
2379 +        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2380 +
2381 +        assertTrue(g.cancel(mayInterruptIfRunning));
2382 +        checkCompletedWithWrappedCancellationException(h);
2383 +        f.complete(v1);
2384 +
2385 +        checkCancelled(g);
2386 +        assertEquals(0, r.invocationCount);
2387 +        checkCompletedNormally(f, v1);
2388 +        checkCompletedWithWrappedCancellationException(h);
2389 +    }}
2390 +
2391 +    public void testRunAfterEither_sourceCancelled3() {
2392 +        for (ExecutionMode m : ExecutionMode.values())
2393 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2394 +        for (Integer v1 : new Integer[] { 1, null })
2395 +    {
2396 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2397 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2398 +        final Noop r = new Noop(m);
2399 +
2400 +        assertTrue(g.cancel(mayInterruptIfRunning));
2401 +        f.complete(v1);
2402 +        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2403 +
2404 +        // unspecified behavior
2405 +        Integer v;
2406 +        try {
2407 +            assertNull(h.join());
2408 +            assertEquals(1, r.invocationCount);
2409 +        } catch (CompletionException ok) {
2410 +            checkCompletedWithWrappedCancellationException(h);
2411 +            assertEquals(0, r.invocationCount);
2412 +        }
2413 +
2414 +        checkCancelled(g);
2415 +        checkCompletedNormally(f, v1);
2416 +    }}
2417 +
2418 +    public void testRunAfterEither_sourceCancelled4() {
2419 +        for (ExecutionMode m : ExecutionMode.values())
2420 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2421 +        for (Integer v1 : new Integer[] { 1, null })
2422 +    {
2423 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2424 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2425 +        final Noop r = new Noop(m);
2426 +
2427 +        assertTrue(f.cancel(mayInterruptIfRunning));
2428 +        g.complete(v1);
2429 +        final CompletableFuture<Void> h = m.runAfterEither(f, g, r);
2430 +
2431 +        // unspecified behavior
2432 +        Integer v;
2433 +        try {
2434 +            assertNull(h.join());
2435 +            assertEquals(1, r.invocationCount);
2436 +        } catch (CompletionException ok) {
2437 +            checkCompletedWithWrappedCancellationException(h);
2438 +            assertEquals(0, r.invocationCount);
2439 +        }
2440 +
2441 +        checkCancelled(f);
2442 +        checkCompletedNormally(g, v1);
2443 +    }}
2444 +
2445 +    /**
2446 +     * thenCompose result completes normally after normal completion of source
2447 +     */
2448 +    public void testThenCompose_normalCompletion() {
2449 +        for (ExecutionMode m : ExecutionMode.values())
2450 +        for (boolean createIncomplete : new boolean[] { true, false })
2451 +        for (Integer v1 : new Integer[] { 1, null })
2452 +    {
2453 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2454 +        final CompletableFutureInc r = new CompletableFutureInc();
2455 +        if (!createIncomplete) f.complete(v1);
2456 +        final CompletableFuture<Integer> g = f.thenCompose(r);
2457 +        if (createIncomplete) f.complete(v1);
2458 +
2459 +        checkCompletedNormally(g, inc(v1));
2460 +        checkCompletedNormally(f, v1);
2461 +        assertEquals(1, r.invocationCount);
2462 +    }}
2463 +
2464 +    /**
2465 +     * thenCompose result completes exceptionally after exceptional
2466 +     * completion of source
2467 +     */
2468 +    public void testThenCompose_exceptionalCompletion() {
2469 +        for (ExecutionMode m : ExecutionMode.values())
2470 +        for (boolean createIncomplete : new boolean[] { true, false })
2471 +    {
2472 +        final CFException ex = new CFException();
2473 +        final CompletableFutureInc r = new CompletableFutureInc();
2474 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2475 +        if (!createIncomplete) f.completeExceptionally(ex);
2476 +        final CompletableFuture<Integer> g = f.thenCompose(r);
2477 +        if (createIncomplete) f.completeExceptionally(ex);
2478 +
2479 +        checkCompletedWithWrappedCFException(g, ex);
2480 +        checkCompletedWithWrappedCFException(f, ex);
2481 +        assertEquals(0, r.invocationCount);
2482 +    }}
2483 +
2484 +    /**
2485 +     * thenCompose result completes exceptionally if action does
2486 +     */
2487 +    public void testThenCompose_actionFailed() {
2488 +        for (ExecutionMode m : ExecutionMode.values())
2489 +        for (boolean createIncomplete : new boolean[] { true, false })
2490 +        for (Integer v1 : new Integer[] { 1, null })
2491 +    {
2492 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2493 +        final FailingCompletableFutureFunction r
2494 +            = new FailingCompletableFutureFunction();
2495 +        if (!createIncomplete) f.complete(v1);
2496 +        final CompletableFuture<Integer> g = f.thenCompose(r);
2497 +        if (createIncomplete) f.complete(v1);
2498 +
2499 +        checkCompletedWithWrappedCFException(g);
2500 +        checkCompletedNormally(f, v1);
2501 +    }}
2502 +
2503 +    /**
2504 +     * thenCompose result completes exceptionally if source cancelled
2505 +     */
2506 +    public void testThenCompose_sourceCancelled() {
2507 +        for (ExecutionMode m : ExecutionMode.values())
2508 +        for (boolean createIncomplete : new boolean[] { true, false })
2509 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2510 +    {
2511 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2512 +        final CompletableFutureInc r = new CompletableFutureInc();
2513 +        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
2514 +        final CompletableFuture<Integer> g = f.thenCompose(r);
2515 +        if (createIncomplete) {
2516 +            checkIncomplete(g);
2517 +            assertTrue(f.cancel(mayInterruptIfRunning));
2518 +        }
2519 +
2520 +        checkCompletedWithWrappedCancellationException(g);
2521 +        checkCancelled(f);
2522 +    }}
2523 +
2524 +    // other static methods
2525 +
2526 +    /**
2527       * allOf(no component futures) returns a future completed normally
2528       * with the value null
2529       */
2530      public void testAllOf_empty() throws Exception {
2531 <        CompletableFuture<?> f = CompletableFuture.allOf();
2531 >        CompletableFuture<Void> f = CompletableFuture.allOf();
2532          checkCompletedNormally(f, null);
2533      }
2534  
2535      /**
2536 +     * allOf returns a future completed normally with the value null
2537 +     * when all components complete normally
2538 +     */
2539 +    public void testAllOf_normal() throws Exception {
2540 +        for (int k = 1; k < 20; ++k) {
2541 +            CompletableFuture<Integer>[] fs = (CompletableFuture<Integer>[]) new CompletableFuture[k];
2542 +            for (int i = 0; i < k; ++i)
2543 +                fs[i] = new CompletableFuture<>();
2544 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
2545 +            for (int i = 0; i < k; ++i) {
2546 +                checkIncomplete(f);
2547 +                checkIncomplete(CompletableFuture.allOf(fs));
2548 +                fs[i].complete(one);
2549 +            }
2550 +            checkCompletedNormally(f, null);
2551 +            checkCompletedNormally(CompletableFuture.allOf(fs), null);
2552 +        }
2553 +    }
2554 +
2555 +    /**
2556       * anyOf(no component futures) returns an incomplete future
2557       */
2558      public void testAnyOf_empty() throws Exception {
2559 <        CompletableFuture<?> f = CompletableFuture.anyOf();
2559 >        CompletableFuture<Object> f = CompletableFuture.anyOf();
2560          checkIncomplete(f);
2561      }
2562 +
2563 +    /**
2564 +     * anyOf returns a future completed normally with a value when
2565 +     * a component future does
2566 +     */
2567 +    public void testAnyOf_normal() throws Exception {
2568 +        for (int k = 0; k < 10; ++k) {
2569 +            CompletableFuture[] fs = new CompletableFuture[k];
2570 +            for (int i = 0; i < k; ++i)
2571 +                fs[i] = new CompletableFuture<>();
2572 +            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
2573 +            checkIncomplete(f);
2574 +            for (int i = 0; i < k; ++i) {
2575 +                fs[i].complete(one);
2576 +                checkCompletedNormally(f, one);
2577 +                checkCompletedNormally(CompletableFuture.anyOf(fs), one);
2578 +            }
2579 +        }
2580 +    }
2581 +
2582 +    /**
2583 +     * anyOf result completes exceptionally when any component does.
2584 +     */
2585 +    public void testAnyOf_exceptional() throws Exception {
2586 +        for (int k = 0; k < 10; ++k) {
2587 +            CompletableFuture[] fs = new CompletableFuture[k];
2588 +            for (int i = 0; i < k; ++i)
2589 +                fs[i] = new CompletableFuture<>();
2590 +            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
2591 +            checkIncomplete(f);
2592 +            for (int i = 0; i < k; ++i) {
2593 +                fs[i].completeExceptionally(new CFException());
2594 +                checkCompletedWithWrappedCFException(f);
2595 +                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
2596 +            }
2597 +        }
2598 +    }
2599 +
2600 +    /**
2601 +     * Completion methods throw NullPointerException with null arguments
2602 +     */
2603 +    public void testNPE() {
2604 +        CompletableFuture<Integer> f = new CompletableFuture<>();
2605 +        CompletableFuture<Integer> g = new CompletableFuture<>();
2606 +        CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
2607 +        CompletableFuture<?> h;
2608 +        ThreadExecutor exec = new ThreadExecutor();
2609 +
2610 +        Runnable[] throwingActions = {
2611 +            () -> CompletableFuture.supplyAsync(null),
2612 +            () -> CompletableFuture.supplyAsync(null, exec),
2613 +            () -> CompletableFuture.supplyAsync(supplyOne, null),
2614 +
2615 +            () -> CompletableFuture.runAsync(null),
2616 +            () -> CompletableFuture.runAsync(null, exec),
2617 +            () -> CompletableFuture.runAsync(() -> {}, null),
2618 +
2619 +            () -> f.completeExceptionally(null),
2620 +
2621 +            () -> f.thenApply(null),
2622 +            () -> f.thenApplyAsync(null),
2623 +            () -> f.thenApplyAsync((x) -> x, null),
2624 +            () -> f.thenApplyAsync(null, exec),
2625 +
2626 +            () -> f.thenAccept(null),
2627 +            () -> f.thenAcceptAsync(null),
2628 +            () -> f.thenAcceptAsync((x) -> {} , null),
2629 +            () -> f.thenAcceptAsync(null, exec),
2630 +
2631 +            () -> f.thenRun(null),
2632 +            () -> f.thenRunAsync(null),
2633 +            () -> f.thenRunAsync(() -> {} , null),
2634 +            () -> f.thenRunAsync(null, exec),
2635 +
2636 +            () -> f.thenCombine(g, null),
2637 +            () -> f.thenCombineAsync(g, null),
2638 +            () -> f.thenCombineAsync(g, null, exec),
2639 +            () -> f.thenCombine(nullFuture, (x, y) -> x),
2640 +            () -> f.thenCombineAsync(nullFuture, (x, y) -> x),
2641 +            () -> f.thenCombineAsync(nullFuture, (x, y) -> x, exec),
2642 +            () -> f.thenCombineAsync(g, (x, y) -> x, null),
2643 +
2644 +            () -> f.thenAcceptBoth(g, null),
2645 +            () -> f.thenAcceptBothAsync(g, null),
2646 +            () -> f.thenAcceptBothAsync(g, null, exec),
2647 +            () -> f.thenAcceptBoth(nullFuture, (x, y) -> {}),
2648 +            () -> f.thenAcceptBothAsync(nullFuture, (x, y) -> {}),
2649 +            () -> f.thenAcceptBothAsync(nullFuture, (x, y) -> {}, exec),
2650 +            () -> f.thenAcceptBothAsync(g, (x, y) -> {}, null),
2651 +
2652 +            () -> f.runAfterBoth(g, null),
2653 +            () -> f.runAfterBothAsync(g, null),
2654 +            () -> f.runAfterBothAsync(g, null, exec),
2655 +            () -> f.runAfterBoth(nullFuture, () -> {}),
2656 +            () -> f.runAfterBothAsync(nullFuture, () -> {}),
2657 +            () -> f.runAfterBothAsync(nullFuture, () -> {}, exec),
2658 +            () -> f.runAfterBothAsync(g, () -> {}, null),
2659 +
2660 +            () -> f.applyToEither(g, null),
2661 +            () -> f.applyToEitherAsync(g, null),
2662 +            () -> f.applyToEitherAsync(g, null, exec),
2663 +            () -> f.applyToEither(nullFuture, (x) -> x),
2664 +            () -> f.applyToEitherAsync(nullFuture, (x) -> x),
2665 +            () -> f.applyToEitherAsync(nullFuture, (x) -> x, exec),
2666 +            () -> f.applyToEitherAsync(g, (x) -> x, null),
2667 +
2668 +            () -> f.acceptEither(g, null),
2669 +            () -> f.acceptEitherAsync(g, null),
2670 +            () -> f.acceptEitherAsync(g, null, exec),
2671 +            () -> f.acceptEither(nullFuture, (x) -> {}),
2672 +            () -> f.acceptEitherAsync(nullFuture, (x) -> {}),
2673 +            () -> f.acceptEitherAsync(nullFuture, (x) -> {}, exec),
2674 +            () -> f.acceptEitherAsync(g, (x) -> {}, null),
2675 +
2676 +            () -> f.runAfterEither(g, null),
2677 +            () -> f.runAfterEitherAsync(g, null),
2678 +            () -> f.runAfterEitherAsync(g, null, exec),
2679 +            () -> f.runAfterEither(nullFuture, () -> {}),
2680 +            () -> f.runAfterEitherAsync(nullFuture, () -> {}),
2681 +            () -> f.runAfterEitherAsync(nullFuture, () -> {}, exec),
2682 +            () -> f.runAfterEitherAsync(g, () -> {}, null),
2683 +
2684 +            () -> f.thenCompose(null),
2685 +            () -> f.thenComposeAsync(null),
2686 +            () -> f.thenComposeAsync(new CompletableFutureInc(), null),
2687 +            () -> f.thenComposeAsync(null, exec),
2688 +
2689 +            () -> f.exceptionally(null),
2690 +
2691 +            () -> f.handle(null),
2692 +
2693 +            () -> CompletableFuture.allOf((CompletableFuture<?>)null),
2694 +            () -> CompletableFuture.allOf((CompletableFuture<?>[])null),
2695 +            () -> CompletableFuture.allOf(f, null),
2696 +            () -> CompletableFuture.allOf(null, f),
2697 +
2698 +            () -> CompletableFuture.anyOf((CompletableFuture<?>)null),
2699 +            () -> CompletableFuture.anyOf((CompletableFuture<?>[])null),
2700 +            () -> CompletableFuture.anyOf(f, null),
2701 +            () -> CompletableFuture.anyOf(null, f),
2702 +
2703 +            () -> f.obtrudeException(null),
2704 +        };
2705 +
2706 +        assertThrows(NullPointerException.class, throwingActions);
2707 +        assertEquals(0, exec.count.get());
2708 +    }
2709 +
2710 +    /**
2711 +     * toCompletableFuture returns this CompletableFuture.
2712 +     */
2713 +    public void testToCompletableFuture() {
2714 +        CompletableFuture<Integer> f = new CompletableFuture<>();
2715 +        assertSame(f, f.toCompletableFuture());
2716 +    }
2717 +
2718 +    /**
2719 +     * whenComplete action executes on normal completion, propagating
2720 +     * source result.
2721 +     */
2722 +    public void testWhenComplete_normalCompletion1() {
2723 +        for (ExecutionMode m : ExecutionMode.values())
2724 +        for (boolean createIncomplete : new boolean[] { true, false })
2725 +        for (Integer v1 : new Integer[] { 1, null })
2726 +    {
2727 +        final AtomicInteger a = new AtomicInteger(0);
2728 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2729 +        if (!createIncomplete) f.complete(v1);
2730 +        final CompletableFuture<Integer> g = m.whenComplete
2731 +            (f,
2732 +             (Integer x, Throwable t) -> {
2733 +                threadAssertSame(x, v1);
2734 +                threadAssertNull(t);
2735 +                a.getAndIncrement();
2736 +            });
2737 +        if (createIncomplete) f.complete(v1);
2738 +
2739 +        checkCompletedNormally(g, v1);
2740 +        checkCompletedNormally(f, v1);
2741 +        assertEquals(1, a.get());
2742 +    }}
2743 +
2744 +    /**
2745 +     * whenComplete action executes on exceptional completion, propagating
2746 +     * source result.
2747 +     */
2748 +    public void testWhenComplete_exceptionalCompletion() {
2749 +        for (ExecutionMode m : ExecutionMode.values())
2750 +        for (boolean createIncomplete : new boolean[] { true, false })
2751 +        for (Integer v1 : new Integer[] { 1, null })
2752 +    {
2753 +        final AtomicInteger a = new AtomicInteger(0);
2754 +        final CFException ex = new CFException();
2755 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2756 +        if (!createIncomplete) f.completeExceptionally(ex);
2757 +        final CompletableFuture<Integer> g = m.whenComplete
2758 +            (f,
2759 +             (Integer x, Throwable t) -> {
2760 +                threadAssertNull(x);
2761 +                threadAssertSame(t, ex);
2762 +                a.getAndIncrement();
2763 +            });
2764 +        if (createIncomplete) f.completeExceptionally(ex);
2765 +        checkCompletedWithWrappedCFException(f, ex);
2766 +        checkCompletedWithWrappedCFException(g, ex);
2767 +        assertEquals(1, a.get());
2768 +    }}
2769 +
2770 +    /**
2771 +     * whenComplete action executes on cancelled source, propagating
2772 +     * CancellationException.
2773 +     */
2774 +    public void testWhenComplete_sourceCancelled() {
2775 +        for (ExecutionMode m : ExecutionMode.values())
2776 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2777 +        for (boolean createIncomplete : new boolean[] { true, false })
2778 +    {
2779 +        final AtomicInteger a = new AtomicInteger(0);
2780 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2781 +        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
2782 +        final CompletableFuture<Integer> g = m.whenComplete
2783 +            (f,
2784 +             (Integer x, Throwable t) -> {
2785 +                threadAssertNull(x);
2786 +                threadAssertTrue(t instanceof CancellationException);
2787 +                a.getAndIncrement();
2788 +            });
2789 +        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
2790 +
2791 +        //try { g.join(); } catch (Throwable t) { throw new Error(t); }
2792 +        checkCompletedWithWrappedCancellationException(g);
2793 +        checkCancelled(f);
2794 +        assertEquals(1, a.get());
2795 +    }}
2796 +
2797 +    /**
2798 +     * If a whenComplete action throws an exception when triggered by
2799 +     * a normal completion, it completes exceptionally
2800 +     */
2801 +    public void testWhenComplete_actionFailed() {
2802 +        for (boolean createIncomplete : new boolean[] { true, false })
2803 +        for (ExecutionMode m : ExecutionMode.values())
2804 +        for (Integer v1 : new Integer[] { 1, null })
2805 +    {
2806 +        final AtomicInteger a = new AtomicInteger(0);
2807 +        final CFException ex = new CFException();
2808 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2809 +        if (!createIncomplete) f.complete(v1);
2810 +        final CompletableFuture<Integer> g = m.whenComplete
2811 +            (f,
2812 +             (Integer x, Throwable t) -> {
2813 +                threadAssertSame(x, v1);
2814 +                threadAssertNull(t);
2815 +                a.getAndIncrement();
2816 +                throw ex;
2817 +            });
2818 +        if (createIncomplete) f.complete(v1);
2819 +        checkCompletedNormally(f, v1);
2820 +        checkCompletedWithWrappedCFException(g, ex);
2821 +        assertEquals(1, a.get());
2822 +    }}
2823 +
2824 +    /**
2825 +     * If a whenComplete action throws an exception when triggered by
2826 +     * a source completion that also throws an exception, the source
2827 +     * exception takes precedence.
2828 +     */
2829 +    public void testWhenComplete_actionFailedSourceFailed() {
2830 +        for (boolean createIncomplete : new boolean[] { true, false })
2831 +        for (ExecutionMode m : ExecutionMode.values())
2832 +        for (Integer v1 : new Integer[] { 1, null })
2833 +    {
2834 +        final AtomicInteger a = new AtomicInteger(0);
2835 +        final CFException ex1 = new CFException();
2836 +        final CFException ex2 = new CFException();
2837 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2838 +
2839 +        if (!createIncomplete) f.completeExceptionally(ex1);
2840 +        final CompletableFuture<Integer> g = m.whenComplete
2841 +            (f,
2842 +             (Integer x, Throwable t) -> {
2843 +                threadAssertSame(t, ex1);
2844 +                threadAssertNull(x);
2845 +                a.getAndIncrement();
2846 +                throw ex2;
2847 +            });
2848 +        if (createIncomplete) f.completeExceptionally(ex1);
2849 +
2850 +        checkCompletedWithWrappedCFException(f, ex1);
2851 +        checkCompletedWithWrappedCFException(g, ex1);
2852 +        assertEquals(1, a.get());
2853 +    }}
2854 +
2855   }

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