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Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.2 by jsr166, Wed Feb 6 20:29:55 2013 UTC vs.
Revision 1.121 by jsr166, Sun Sep 6 21:14:12 2015 UTC

# Line 1 | Line 1
1   /*
2 < * Written by Doug Lea with assistance from members of JCP JSR-166
3 < * Expert Group and released to the public domain, as explained at
2 > * Written by Doug Lea and Martin Buchholz with assistance from
3 > * members of JCP JSR-166 Expert Group and released to the public
4 > * domain, as explained at
5   * http://creativecommons.org/publicdomain/zero/1.0/
5 * Other contributors include Andrew Wright, Jeffrey Hayes,
6 * Pat Fisher, Mike Judd.
6   */
7  
8 < import junit.framework.*;
8 > import static java.util.concurrent.TimeUnit.MILLISECONDS;
9 > import static java.util.concurrent.TimeUnit.SECONDS;
10 >
11 > import java.util.ArrayList;
12 > import java.util.List;
13 > import java.util.Objects;
14   import java.util.concurrent.Callable;
15   import java.util.concurrent.CancellationException;
12 import java.util.concurrent.CountDownLatch;
13 import java.util.concurrent.ExecutionException;
14 import java.util.concurrent.Future;
16   import java.util.concurrent.CompletableFuture;
17 + import java.util.concurrent.CompletionException;
18 + import java.util.concurrent.CompletionStage;
19 + import java.util.concurrent.ExecutionException;
20 + import java.util.concurrent.Executor;
21 + import java.util.concurrent.ForkJoinPool;
22 + import java.util.concurrent.ForkJoinTask;
23   import java.util.concurrent.TimeoutException;
24 + import java.util.concurrent.TimeUnit;
25   import java.util.concurrent.atomic.AtomicInteger;
26 < import static java.util.concurrent.TimeUnit.MILLISECONDS;
27 < import static java.util.concurrent.TimeUnit.SECONDS;
28 < import java.util.*;
26 > import java.util.concurrent.atomic.AtomicReference;
27 > import java.util.function.BiConsumer;
28 > import java.util.function.BiFunction;
29 > import java.util.function.Consumer;
30 > import java.util.function.Function;
31 > import java.util.function.Supplier;
32 >
33 > import junit.framework.Test;
34 > import junit.framework.TestSuite;
35  
36   public class CompletableFutureTest extends JSR166TestCase {
37  
38      public static void main(String[] args) {
39 <        junit.textui.TestRunner.run(suite());
39 >        main(suite(), args);
40      }
41      public static Test suite() {
42          return new TestSuite(CompletableFutureTest.class);
43      }
44  
45 +    static class CFException extends RuntimeException {}
46 +
47 +    void checkIncomplete(CompletableFuture<?> f) {
48 +        assertFalse(f.isDone());
49 +        assertFalse(f.isCancelled());
50 +        assertTrue(f.toString().contains("Not completed"));
51 +        try {
52 +            assertNull(f.getNow(null));
53 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
54 +        try {
55 +            f.get(0L, SECONDS);
56 +            shouldThrow();
57 +        }
58 +        catch (TimeoutException success) {}
59 +        catch (Throwable fail) { threadUnexpectedException(fail); }
60 +    }
61 +
62 +    <T> void checkCompletedNormally(CompletableFuture<T> f, T value) {
63 +        checkTimedGet(f, value);
64 +
65 +        try {
66 +            assertEquals(value, f.join());
67 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
68 +        try {
69 +            assertEquals(value, f.getNow(null));
70 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
71 +        try {
72 +            assertEquals(value, f.get());
73 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
74 +        assertTrue(f.isDone());
75 +        assertFalse(f.isCancelled());
76 +        assertFalse(f.isCompletedExceptionally());
77 +        assertTrue(f.toString().contains("[Completed normally]"));
78 +    }
79 +
80 +    /**
81 +     * Returns the "raw" internal exceptional completion of f,
82 +     * without any additional wrapping with CompletionException.
83 +     */
84 +    <U> Throwable exceptionalCompletion(CompletableFuture<U> f) {
85 +        // handle (and whenComplete) can distinguish between "direct"
86 +        // and "wrapped" exceptional completion
87 +        return f.handle((U u, Throwable t) -> t).join();
88 +    }
89 +
90 +    void checkCompletedExceptionally(CompletableFuture<?> f,
91 +                                     boolean wrapped,
92 +                                     Consumer<Throwable> checker) {
93 +        Throwable cause = exceptionalCompletion(f);
94 +        if (wrapped) {
95 +            assertTrue(cause instanceof CompletionException);
96 +            cause = cause.getCause();
97 +        }
98 +        checker.accept(cause);
99 +
100 +        long startTime = System.nanoTime();
101 +        try {
102 +            f.get(LONG_DELAY_MS, MILLISECONDS);
103 +            shouldThrow();
104 +        } catch (ExecutionException success) {
105 +            assertSame(cause, success.getCause());
106 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
107 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
108 +
109 +        try {
110 +            f.join();
111 +            shouldThrow();
112 +        } catch (CompletionException success) {
113 +            assertSame(cause, success.getCause());
114 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
115 +
116 +        try {
117 +            f.getNow(null);
118 +            shouldThrow();
119 +        } catch (CompletionException success) {
120 +            assertSame(cause, success.getCause());
121 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
122 +
123 +        try {
124 +            f.get();
125 +            shouldThrow();
126 +        } catch (ExecutionException success) {
127 +            assertSame(cause, success.getCause());
128 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
129 +
130 +        assertFalse(f.isCancelled());
131 +        assertTrue(f.isDone());
132 +        assertTrue(f.isCompletedExceptionally());
133 +        assertTrue(f.toString().contains("[Completed exceptionally]"));
134 +    }
135 +
136 +    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
137 +        checkCompletedExceptionally(f, true,
138 +            (t) -> assertTrue(t instanceof CFException));
139 +    }
140 +
141 +    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
142 +        checkCompletedExceptionally(f, true,
143 +            (t) -> assertTrue(t instanceof CancellationException));
144 +    }
145 +
146 +    void checkCompletedWithTimeoutException(CompletableFuture<?> f) {
147 +        checkCompletedExceptionally(f, false,
148 +            (t) -> assertTrue(t instanceof TimeoutException));
149 +    }
150 +
151 +    void checkCompletedWithWrappedException(CompletableFuture<?> f,
152 +                                            Throwable ex) {
153 +        checkCompletedExceptionally(f, true, (t) -> assertSame(t, ex));
154 +    }
155 +
156 +    void checkCompletedExceptionally(CompletableFuture<?> f, Throwable ex) {
157 +        checkCompletedExceptionally(f, false, (t) -> assertSame(t, ex));
158 +    }
159 +
160 +    void checkCancelled(CompletableFuture<?> f) {
161 +        long startTime = System.nanoTime();
162 +        try {
163 +            f.get(LONG_DELAY_MS, MILLISECONDS);
164 +            shouldThrow();
165 +        } catch (CancellationException success) {
166 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
167 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
168 +
169 +        try {
170 +            f.join();
171 +            shouldThrow();
172 +        } catch (CancellationException success) {}
173 +        try {
174 +            f.getNow(null);
175 +            shouldThrow();
176 +        } catch (CancellationException success) {}
177 +        try {
178 +            f.get();
179 +            shouldThrow();
180 +        } catch (CancellationException success) {
181 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
182 +
183 +        assertTrue(exceptionalCompletion(f) instanceof CancellationException);
184 +
185 +        assertTrue(f.isDone());
186 +        assertTrue(f.isCompletedExceptionally());
187 +        assertTrue(f.isCancelled());
188 +        assertTrue(f.toString().contains("[Completed exceptionally]"));
189 +    }
190 +
191 +    /**
192 +     * A newly constructed CompletableFuture is incomplete, as indicated
193 +     * by methods isDone, isCancelled, and getNow
194 +     */
195 +    public void testConstructor() {
196 +        CompletableFuture<Integer> f = new CompletableFuture<>();
197 +        checkIncomplete(f);
198 +    }
199 +
200 +    /**
201 +     * complete completes normally, as indicated by methods isDone,
202 +     * isCancelled, join, get, and getNow
203 +     */
204 +    public void testComplete() {
205 +        for (Integer v1 : new Integer[] { 1, null })
206 +    {
207 +        CompletableFuture<Integer> f = new CompletableFuture<>();
208 +        checkIncomplete(f);
209 +        assertTrue(f.complete(v1));
210 +        assertFalse(f.complete(v1));
211 +        checkCompletedNormally(f, v1);
212 +    }}
213 +
214 +    /**
215 +     * completeExceptionally completes exceptionally, as indicated by
216 +     * methods isDone, isCancelled, join, get, and getNow
217 +     */
218 +    public void testCompleteExceptionally() {
219 +        CompletableFuture<Integer> f = new CompletableFuture<>();
220 +        CFException ex = new CFException();
221 +        checkIncomplete(f);
222 +        f.completeExceptionally(ex);
223 +        checkCompletedExceptionally(f, ex);
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 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
232 +    {
233 +        CompletableFuture<Integer> f = new CompletableFuture<>();
234 +        checkIncomplete(f);
235 +        assertTrue(f.cancel(mayInterruptIfRunning));
236 +        assertTrue(f.cancel(mayInterruptIfRunning));
237 +        assertTrue(f.cancel(!mayInterruptIfRunning));
238 +        checkCancelled(f);
239 +    }}
240 +
241 +    /**
242 +     * obtrudeValue forces completion with given value
243 +     */
244 +    public void testObtrudeValue() {
245 +        CompletableFuture<Integer> f = new CompletableFuture<>();
246 +        checkIncomplete(f);
247 +        assertTrue(f.complete(one));
248 +        checkCompletedNormally(f, one);
249 +        f.obtrudeValue(three);
250 +        checkCompletedNormally(f, three);
251 +        f.obtrudeValue(two);
252 +        checkCompletedNormally(f, two);
253 +        f = new CompletableFuture<>();
254 +        f.obtrudeValue(three);
255 +        checkCompletedNormally(f, three);
256 +        f.obtrudeValue(null);
257 +        checkCompletedNormally(f, null);
258 +        f = new CompletableFuture<>();
259 +        f.completeExceptionally(new CFException());
260 +        f.obtrudeValue(four);
261 +        checkCompletedNormally(f, four);
262 +    }
263 +
264 +    /**
265 +     * obtrudeException forces completion with given exception
266 +     */
267 +    public void testObtrudeException() {
268 +        for (Integer v1 : new Integer[] { 1, null })
269 +    {
270 +        CFException ex;
271 +        CompletableFuture<Integer> f;
272 +
273 +        f = new CompletableFuture<>();
274 +        assertTrue(f.complete(v1));
275 +        for (int i = 0; i < 2; i++) {
276 +            f.obtrudeException(ex = new CFException());
277 +            checkCompletedExceptionally(f, ex);
278 +        }
279 +
280 +        f = new CompletableFuture<>();
281 +        for (int i = 0; i < 2; i++) {
282 +            f.obtrudeException(ex = new CFException());
283 +            checkCompletedExceptionally(f, ex);
284 +        }
285 +
286 +        f = new CompletableFuture<>();
287 +        f.completeExceptionally(ex = new CFException());
288 +        f.obtrudeValue(v1);
289 +        checkCompletedNormally(f, v1);
290 +        f.obtrudeException(ex = new CFException());
291 +        checkCompletedExceptionally(f, ex);
292 +        f.completeExceptionally(new CFException());
293 +        checkCompletedExceptionally(f, ex);
294 +        assertFalse(f.complete(v1));
295 +        checkCompletedExceptionally(f, ex);
296 +    }}
297 +
298 +    /**
299 +     * getNumberOfDependents returns number of dependent tasks
300 +     */
301 +    public void testGetNumberOfDependents() {
302 +        for (ExecutionMode m : ExecutionMode.values())
303 +        for (Integer v1 : new Integer[] { 1, null })
304 +    {
305 +        CompletableFuture<Integer> f = new CompletableFuture<>();
306 +        assertEquals(0, f.getNumberOfDependents());
307 +        final CompletableFuture<Void> g = m.thenRun(f, new Noop(m));
308 +        assertEquals(1, f.getNumberOfDependents());
309 +        assertEquals(0, g.getNumberOfDependents());
310 +        final CompletableFuture<Void> h = m.thenRun(f, new Noop(m));
311 +        assertEquals(2, f.getNumberOfDependents());
312 +        assertEquals(0, h.getNumberOfDependents());
313 +        assertTrue(f.complete(v1));
314 +        checkCompletedNormally(g, null);
315 +        checkCompletedNormally(h, null);
316 +        assertEquals(0, f.getNumberOfDependents());
317 +        assertEquals(0, g.getNumberOfDependents());
318 +        assertEquals(0, h.getNumberOfDependents());
319 +    }}
320 +
321 +    /**
322 +     * toString indicates current completion state
323 +     */
324      public void testToString() {
325          CompletableFuture<String> f;
326  
327          f = new CompletableFuture<String>();
328          assertTrue(f.toString().contains("[Not completed]"));
329  
330 <        f.complete("foo");
330 >        assertTrue(f.complete("foo"));
331          assertTrue(f.toString().contains("[Completed normally]"));
332  
333          f = new CompletableFuture<String>();
334 <        f.completeExceptionally(new IndexOutOfBoundsException());
334 >        assertTrue(f.completeExceptionally(new IndexOutOfBoundsException()));
335          assertTrue(f.toString().contains("[Completed exceptionally]"));
336 +
337 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
338 +            f = new CompletableFuture<String>();
339 +            assertTrue(f.cancel(mayInterruptIfRunning));
340 +            assertTrue(f.toString().contains("[Completed exceptionally]"));
341 +        }
342 +    }
343 +
344 +    /**
345 +     * completedFuture returns a completed CompletableFuture with given value
346 +     */
347 +    public void testCompletedFuture() {
348 +        CompletableFuture<String> f = CompletableFuture.completedFuture("test");
349 +        checkCompletedNormally(f, "test");
350 +    }
351 +
352 +    abstract class CheckedAction {
353 +        int invocationCount = 0;
354 +        final ExecutionMode m;
355 +        CheckedAction(ExecutionMode m) { this.m = m; }
356 +        void invoked() {
357 +            m.checkExecutionMode();
358 +            assertEquals(0, invocationCount++);
359 +        }
360 +        void assertNotInvoked() { assertEquals(0, invocationCount); }
361 +        void assertInvoked() { assertEquals(1, invocationCount); }
362 +    }
363 +
364 +    abstract class CheckedIntegerAction extends CheckedAction {
365 +        Integer value;
366 +        CheckedIntegerAction(ExecutionMode m) { super(m); }
367 +        void assertValue(Integer expected) {
368 +            assertInvoked();
369 +            assertEquals(expected, value);
370 +        }
371 +    }
372 +
373 +    class IntegerSupplier extends CheckedAction
374 +        implements Supplier<Integer>
375 +    {
376 +        final Integer value;
377 +        IntegerSupplier(ExecutionMode m, Integer value) {
378 +            super(m);
379 +            this.value = value;
380 +        }
381 +        public Integer get() {
382 +            invoked();
383 +            return value;
384 +        }
385 +    }
386 +
387 +    // A function that handles and produces null values as well.
388 +    static Integer inc(Integer x) {
389 +        return (x == null) ? null : x + 1;
390 +    }
391 +
392 +    class NoopConsumer extends CheckedIntegerAction
393 +        implements Consumer<Integer>
394 +    {
395 +        NoopConsumer(ExecutionMode m) { super(m); }
396 +        public void accept(Integer x) {
397 +            invoked();
398 +            value = x;
399 +        }
400 +    }
401 +
402 +    class IncFunction extends CheckedIntegerAction
403 +        implements Function<Integer,Integer>
404 +    {
405 +        IncFunction(ExecutionMode m) { super(m); }
406 +        public Integer apply(Integer x) {
407 +            invoked();
408 +            return value = inc(x);
409 +        }
410 +    }
411 +
412 +    // Choose non-commutative actions for better coverage
413 +    // A non-commutative function that handles and produces null values as well.
414 +    static Integer subtract(Integer x, Integer y) {
415 +        return (x == null && y == null) ? null :
416 +            ((x == null) ? 42 : x.intValue())
417 +            - ((y == null) ? 99 : y.intValue());
418 +    }
419 +
420 +    class SubtractAction extends CheckedIntegerAction
421 +        implements BiConsumer<Integer, Integer>
422 +    {
423 +        SubtractAction(ExecutionMode m) { super(m); }
424 +        public void accept(Integer x, Integer y) {
425 +            invoked();
426 +            value = subtract(x, y);
427 +        }
428 +    }
429 +
430 +    class SubtractFunction extends CheckedIntegerAction
431 +        implements BiFunction<Integer, Integer, Integer>
432 +    {
433 +        SubtractFunction(ExecutionMode m) { super(m); }
434 +        public Integer apply(Integer x, Integer y) {
435 +            invoked();
436 +            return value = subtract(x, y);
437 +        }
438 +    }
439 +
440 +    class Noop extends CheckedAction implements Runnable {
441 +        Noop(ExecutionMode m) { super(m); }
442 +        public void run() {
443 +            invoked();
444 +        }
445 +    }
446 +
447 +    class FailingSupplier extends CheckedAction
448 +        implements Supplier<Integer>
449 +    {
450 +        FailingSupplier(ExecutionMode m) { super(m); }
451 +        public Integer get() {
452 +            invoked();
453 +            throw new CFException();
454 +        }
455 +    }
456 +
457 +    class FailingConsumer extends CheckedIntegerAction
458 +        implements Consumer<Integer>
459 +    {
460 +        FailingConsumer(ExecutionMode m) { super(m); }
461 +        public void accept(Integer x) {
462 +            invoked();
463 +            value = x;
464 +            throw new CFException();
465 +        }
466 +    }
467 +
468 +    class FailingBiConsumer extends CheckedIntegerAction
469 +        implements BiConsumer<Integer, Integer>
470 +    {
471 +        FailingBiConsumer(ExecutionMode m) { super(m); }
472 +        public void accept(Integer x, Integer y) {
473 +            invoked();
474 +            value = subtract(x, y);
475 +            throw new CFException();
476 +        }
477 +    }
478 +
479 +    class FailingFunction extends CheckedIntegerAction
480 +        implements Function<Integer, Integer>
481 +    {
482 +        FailingFunction(ExecutionMode m) { super(m); }
483 +        public Integer apply(Integer x) {
484 +            invoked();
485 +            value = x;
486 +            throw new CFException();
487 +        }
488 +    }
489 +
490 +    class FailingBiFunction extends CheckedIntegerAction
491 +        implements BiFunction<Integer, Integer, Integer>
492 +    {
493 +        FailingBiFunction(ExecutionMode m) { super(m); }
494 +        public Integer apply(Integer x, Integer y) {
495 +            invoked();
496 +            value = subtract(x, y);
497 +            throw new CFException();
498 +        }
499 +    }
500 +
501 +    class FailingRunnable extends CheckedAction implements Runnable {
502 +        FailingRunnable(ExecutionMode m) { super(m); }
503 +        public void run() {
504 +            invoked();
505 +            throw new CFException();
506 +        }
507 +    }
508 +
509 +    class CompletableFutureInc extends CheckedIntegerAction
510 +        implements Function<Integer, CompletableFuture<Integer>>
511 +    {
512 +        CompletableFutureInc(ExecutionMode m) { super(m); }
513 +        public CompletableFuture<Integer> apply(Integer x) {
514 +            invoked();
515 +            value = x;
516 +            CompletableFuture<Integer> f = new CompletableFuture<>();
517 +            assertTrue(f.complete(inc(x)));
518 +            return f;
519 +        }
520 +    }
521 +
522 +    class FailingCompletableFutureFunction extends CheckedIntegerAction
523 +        implements Function<Integer, CompletableFuture<Integer>>
524 +    {
525 +        FailingCompletableFutureFunction(ExecutionMode m) { super(m); }
526 +        public CompletableFuture<Integer> apply(Integer x) {
527 +            invoked();
528 +            value = x;
529 +            throw new CFException();
530 +        }
531 +    }
532 +
533 +    // Used for explicit executor tests
534 +    static final class ThreadExecutor implements Executor {
535 +        final AtomicInteger count = new AtomicInteger(0);
536 +        static final ThreadGroup tg = new ThreadGroup("ThreadExecutor");
537 +        static boolean startedCurrentThread() {
538 +            return Thread.currentThread().getThreadGroup() == tg;
539 +        }
540 +
541 +        public void execute(Runnable r) {
542 +            count.getAndIncrement();
543 +            new Thread(tg, r).start();
544 +        }
545 +    }
546 +
547 +    static final boolean defaultExecutorIsCommonPool
548 +        = ForkJoinPool.getCommonPoolParallelism() > 1;
549 +
550 +    /**
551 +     * Permits the testing of parallel code for the 3 different
552 +     * execution modes without copy/pasting all the test methods.
553 +     */
554 +    enum ExecutionMode {
555 +        SYNC {
556 +            public void checkExecutionMode() {
557 +                assertFalse(ThreadExecutor.startedCurrentThread());
558 +                assertNull(ForkJoinTask.getPool());
559 +            }
560 +            public CompletableFuture<Void> runAsync(Runnable a) {
561 +                throw new UnsupportedOperationException();
562 +            }
563 +            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
564 +                throw new UnsupportedOperationException();
565 +            }
566 +            public <T> CompletableFuture<Void> thenRun
567 +                (CompletableFuture<T> f, Runnable a) {
568 +                return f.thenRun(a);
569 +            }
570 +            public <T> CompletableFuture<Void> thenAccept
571 +                (CompletableFuture<T> f, Consumer<? super T> a) {
572 +                return f.thenAccept(a);
573 +            }
574 +            public <T,U> CompletableFuture<U> thenApply
575 +                (CompletableFuture<T> f, Function<? super T,U> a) {
576 +                return f.thenApply(a);
577 +            }
578 +            public <T,U> CompletableFuture<U> thenCompose
579 +                (CompletableFuture<T> f,
580 +                 Function<? super T,? extends CompletionStage<U>> a) {
581 +                return f.thenCompose(a);
582 +            }
583 +            public <T,U> CompletableFuture<U> handle
584 +                (CompletableFuture<T> f,
585 +                 BiFunction<? super T,Throwable,? extends U> a) {
586 +                return f.handle(a);
587 +            }
588 +            public <T> CompletableFuture<T> whenComplete
589 +                (CompletableFuture<T> f,
590 +                 BiConsumer<? super T,? super Throwable> a) {
591 +                return f.whenComplete(a);
592 +            }
593 +            public <T,U> CompletableFuture<Void> runAfterBoth
594 +                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
595 +                return f.runAfterBoth(g, a);
596 +            }
597 +            public <T,U> CompletableFuture<Void> thenAcceptBoth
598 +                (CompletableFuture<T> f,
599 +                 CompletionStage<? extends U> g,
600 +                 BiConsumer<? super T,? super U> a) {
601 +                return f.thenAcceptBoth(g, a);
602 +            }
603 +            public <T,U,V> CompletableFuture<V> thenCombine
604 +                (CompletableFuture<T> f,
605 +                 CompletionStage<? extends U> g,
606 +                 BiFunction<? super T,? super U,? extends V> a) {
607 +                return f.thenCombine(g, a);
608 +            }
609 +            public <T> CompletableFuture<Void> runAfterEither
610 +                (CompletableFuture<T> f,
611 +                 CompletionStage<?> g,
612 +                 java.lang.Runnable a) {
613 +                return f.runAfterEither(g, a);
614 +            }
615 +            public <T> CompletableFuture<Void> acceptEither
616 +                (CompletableFuture<T> f,
617 +                 CompletionStage<? extends T> g,
618 +                 Consumer<? super T> a) {
619 +                return f.acceptEither(g, a);
620 +            }
621 +            public <T,U> CompletableFuture<U> applyToEither
622 +                (CompletableFuture<T> f,
623 +                 CompletionStage<? extends T> g,
624 +                 Function<? super T,U> a) {
625 +                return f.applyToEither(g, a);
626 +            }
627 +        },
628 +
629 +        ASYNC {
630 +            public void checkExecutionMode() {
631 +                assertEquals(defaultExecutorIsCommonPool,
632 +                             (ForkJoinPool.commonPool() == ForkJoinTask.getPool()));
633 +            }
634 +            public CompletableFuture<Void> runAsync(Runnable a) {
635 +                return CompletableFuture.runAsync(a);
636 +            }
637 +            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
638 +                return CompletableFuture.supplyAsync(a);
639 +            }
640 +            public <T> CompletableFuture<Void> thenRun
641 +                (CompletableFuture<T> f, Runnable a) {
642 +                return f.thenRunAsync(a);
643 +            }
644 +            public <T> CompletableFuture<Void> thenAccept
645 +                (CompletableFuture<T> f, Consumer<? super T> a) {
646 +                return f.thenAcceptAsync(a);
647 +            }
648 +            public <T,U> CompletableFuture<U> thenApply
649 +                (CompletableFuture<T> f, Function<? super T,U> a) {
650 +                return f.thenApplyAsync(a);
651 +            }
652 +            public <T,U> CompletableFuture<U> thenCompose
653 +                (CompletableFuture<T> f,
654 +                 Function<? super T,? extends CompletionStage<U>> a) {
655 +                return f.thenComposeAsync(a);
656 +            }
657 +            public <T,U> CompletableFuture<U> handle
658 +                (CompletableFuture<T> f,
659 +                 BiFunction<? super T,Throwable,? extends U> a) {
660 +                return f.handleAsync(a);
661 +            }
662 +            public <T> CompletableFuture<T> whenComplete
663 +                (CompletableFuture<T> f,
664 +                 BiConsumer<? super T,? super Throwable> a) {
665 +                return f.whenCompleteAsync(a);
666 +            }
667 +            public <T,U> CompletableFuture<Void> runAfterBoth
668 +                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
669 +                return f.runAfterBothAsync(g, a);
670 +            }
671 +            public <T,U> CompletableFuture<Void> thenAcceptBoth
672 +                (CompletableFuture<T> f,
673 +                 CompletionStage<? extends U> g,
674 +                 BiConsumer<? super T,? super U> a) {
675 +                return f.thenAcceptBothAsync(g, a);
676 +            }
677 +            public <T,U,V> CompletableFuture<V> thenCombine
678 +                (CompletableFuture<T> f,
679 +                 CompletionStage<? extends U> g,
680 +                 BiFunction<? super T,? super U,? extends V> a) {
681 +                return f.thenCombineAsync(g, a);
682 +            }
683 +            public <T> CompletableFuture<Void> runAfterEither
684 +                (CompletableFuture<T> f,
685 +                 CompletionStage<?> g,
686 +                 java.lang.Runnable a) {
687 +                return f.runAfterEitherAsync(g, a);
688 +            }
689 +            public <T> CompletableFuture<Void> acceptEither
690 +                (CompletableFuture<T> f,
691 +                 CompletionStage<? extends T> g,
692 +                 Consumer<? super T> a) {
693 +                return f.acceptEitherAsync(g, a);
694 +            }
695 +            public <T,U> CompletableFuture<U> applyToEither
696 +                (CompletableFuture<T> f,
697 +                 CompletionStage<? extends T> g,
698 +                 Function<? super T,U> a) {
699 +                return f.applyToEitherAsync(g, a);
700 +            }
701 +        },
702 +
703 +        EXECUTOR {
704 +            public void checkExecutionMode() {
705 +                assertTrue(ThreadExecutor.startedCurrentThread());
706 +            }
707 +            public CompletableFuture<Void> runAsync(Runnable a) {
708 +                return CompletableFuture.runAsync(a, new ThreadExecutor());
709 +            }
710 +            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
711 +                return CompletableFuture.supplyAsync(a, new ThreadExecutor());
712 +            }
713 +            public <T> CompletableFuture<Void> thenRun
714 +                (CompletableFuture<T> f, Runnable a) {
715 +                return f.thenRunAsync(a, new ThreadExecutor());
716 +            }
717 +            public <T> CompletableFuture<Void> thenAccept
718 +                (CompletableFuture<T> f, Consumer<? super T> a) {
719 +                return f.thenAcceptAsync(a, new ThreadExecutor());
720 +            }
721 +            public <T,U> CompletableFuture<U> thenApply
722 +                (CompletableFuture<T> f, Function<? super T,U> a) {
723 +                return f.thenApplyAsync(a, new ThreadExecutor());
724 +            }
725 +            public <T,U> CompletableFuture<U> thenCompose
726 +                (CompletableFuture<T> f,
727 +                 Function<? super T,? extends CompletionStage<U>> a) {
728 +                return f.thenComposeAsync(a, new ThreadExecutor());
729 +            }
730 +            public <T,U> CompletableFuture<U> handle
731 +                (CompletableFuture<T> f,
732 +                 BiFunction<? super T,Throwable,? extends U> a) {
733 +                return f.handleAsync(a, new ThreadExecutor());
734 +            }
735 +            public <T> CompletableFuture<T> whenComplete
736 +                (CompletableFuture<T> f,
737 +                 BiConsumer<? super T,? super Throwable> a) {
738 +                return f.whenCompleteAsync(a, new ThreadExecutor());
739 +            }
740 +            public <T,U> CompletableFuture<Void> runAfterBoth
741 +                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
742 +                return f.runAfterBothAsync(g, a, new ThreadExecutor());
743 +            }
744 +            public <T,U> CompletableFuture<Void> thenAcceptBoth
745 +                (CompletableFuture<T> f,
746 +                 CompletionStage<? extends U> g,
747 +                 BiConsumer<? super T,? super U> a) {
748 +                return f.thenAcceptBothAsync(g, a, new ThreadExecutor());
749 +            }
750 +            public <T,U,V> CompletableFuture<V> thenCombine
751 +                (CompletableFuture<T> f,
752 +                 CompletionStage<? extends U> g,
753 +                 BiFunction<? super T,? super U,? extends V> a) {
754 +                return f.thenCombineAsync(g, a, new ThreadExecutor());
755 +            }
756 +            public <T> CompletableFuture<Void> runAfterEither
757 +                (CompletableFuture<T> f,
758 +                 CompletionStage<?> g,
759 +                 java.lang.Runnable a) {
760 +                return f.runAfterEitherAsync(g, a, new ThreadExecutor());
761 +            }
762 +            public <T> CompletableFuture<Void> acceptEither
763 +                (CompletableFuture<T> f,
764 +                 CompletionStage<? extends T> g,
765 +                 Consumer<? super T> a) {
766 +                return f.acceptEitherAsync(g, a, new ThreadExecutor());
767 +            }
768 +            public <T,U> CompletableFuture<U> applyToEither
769 +                (CompletableFuture<T> f,
770 +                 CompletionStage<? extends T> g,
771 +                 Function<? super T,U> a) {
772 +                return f.applyToEitherAsync(g, a, new ThreadExecutor());
773 +            }
774 +        };
775 +
776 +        public abstract void checkExecutionMode();
777 +        public abstract CompletableFuture<Void> runAsync(Runnable a);
778 +        public abstract <U> CompletableFuture<U> supplyAsync(Supplier<U> a);
779 +        public abstract <T> CompletableFuture<Void> thenRun
780 +            (CompletableFuture<T> f, Runnable a);
781 +        public abstract <T> CompletableFuture<Void> thenAccept
782 +            (CompletableFuture<T> f, Consumer<? super T> a);
783 +        public abstract <T,U> CompletableFuture<U> thenApply
784 +            (CompletableFuture<T> f, Function<? super T,U> a);
785 +        public abstract <T,U> CompletableFuture<U> thenCompose
786 +            (CompletableFuture<T> f,
787 +             Function<? super T,? extends CompletionStage<U>> a);
788 +        public abstract <T,U> CompletableFuture<U> handle
789 +            (CompletableFuture<T> f,
790 +             BiFunction<? super T,Throwable,? extends U> a);
791 +        public abstract <T> CompletableFuture<T> whenComplete
792 +            (CompletableFuture<T> f,
793 +             BiConsumer<? super T,? super Throwable> a);
794 +        public abstract <T,U> CompletableFuture<Void> runAfterBoth
795 +            (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a);
796 +        public abstract <T,U> CompletableFuture<Void> thenAcceptBoth
797 +            (CompletableFuture<T> f,
798 +             CompletionStage<? extends U> g,
799 +             BiConsumer<? super T,? super U> a);
800 +        public abstract <T,U,V> CompletableFuture<V> thenCombine
801 +            (CompletableFuture<T> f,
802 +             CompletionStage<? extends U> g,
803 +             BiFunction<? super T,? super U,? extends V> a);
804 +        public abstract <T> CompletableFuture<Void> runAfterEither
805 +            (CompletableFuture<T> f,
806 +             CompletionStage<?> g,
807 +             java.lang.Runnable a);
808 +        public abstract <T> CompletableFuture<Void> acceptEither
809 +            (CompletableFuture<T> f,
810 +             CompletionStage<? extends T> g,
811 +             Consumer<? super T> a);
812 +        public abstract <T,U> CompletableFuture<U> applyToEither
813 +            (CompletableFuture<T> f,
814 +             CompletionStage<? extends T> g,
815 +             Function<? super T,U> a);
816      }
817 +
818 +    /**
819 +     * exceptionally action is not invoked when source completes
820 +     * normally, and source result is propagated
821 +     */
822 +    public void testExceptionally_normalCompletion() {
823 +        for (boolean createIncomplete : new boolean[] { true, false })
824 +        for (Integer v1 : new Integer[] { 1, null })
825 +    {
826 +        final AtomicInteger a = new AtomicInteger(0);
827 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
828 +        if (!createIncomplete) assertTrue(f.complete(v1));
829 +        final CompletableFuture<Integer> g = f.exceptionally
830 +            ((Throwable t) -> {
831 +                // Should not be called
832 +                a.getAndIncrement();
833 +                throw new AssertionError();
834 +            });
835 +        if (createIncomplete) assertTrue(f.complete(v1));
836 +
837 +        checkCompletedNormally(g, v1);
838 +        checkCompletedNormally(f, v1);
839 +        assertEquals(0, a.get());
840 +    }}
841 +
842 +    /**
843 +     * exceptionally action completes with function value on source
844 +     * exception
845 +     */
846 +    public void testExceptionally_exceptionalCompletion() {
847 +        for (boolean createIncomplete : new boolean[] { true, false })
848 +        for (Integer v1 : new Integer[] { 1, null })
849 +    {
850 +        final AtomicInteger a = new AtomicInteger(0);
851 +        final CFException ex = new CFException();
852 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
853 +        if (!createIncomplete) f.completeExceptionally(ex);
854 +        final CompletableFuture<Integer> g = f.exceptionally
855 +            ((Throwable t) -> {
856 +                ExecutionMode.SYNC.checkExecutionMode();
857 +                threadAssertSame(t, ex);
858 +                a.getAndIncrement();
859 +                return v1;
860 +            });
861 +        if (createIncomplete) f.completeExceptionally(ex);
862 +
863 +        checkCompletedNormally(g, v1);
864 +        assertEquals(1, a.get());
865 +    }}
866 +
867 +    public void testExceptionally_exceptionalCompletionActionFailed() {
868 +        for (boolean createIncomplete : new boolean[] { true, false })
869 +    {
870 +        final AtomicInteger a = new AtomicInteger(0);
871 +        final CFException ex1 = new CFException();
872 +        final CFException ex2 = new CFException();
873 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
874 +        if (!createIncomplete) f.completeExceptionally(ex1);
875 +        final CompletableFuture<Integer> g = f.exceptionally
876 +            ((Throwable t) -> {
877 +                ExecutionMode.SYNC.checkExecutionMode();
878 +                threadAssertSame(t, ex1);
879 +                a.getAndIncrement();
880 +                throw ex2;
881 +            });
882 +        if (createIncomplete) f.completeExceptionally(ex1);
883 +
884 +        checkCompletedWithWrappedException(g, ex2);
885 +        assertEquals(1, a.get());
886 +    }}
887 +
888 +    /**
889 +     * whenComplete action executes on normal completion, propagating
890 +     * source result.
891 +     */
892 +    public void testWhenComplete_normalCompletion1() {
893 +        for (ExecutionMode m : ExecutionMode.values())
894 +        for (boolean createIncomplete : new boolean[] { true, false })
895 +        for (Integer v1 : new Integer[] { 1, null })
896 +    {
897 +        final AtomicInteger a = new AtomicInteger(0);
898 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
899 +        if (!createIncomplete) assertTrue(f.complete(v1));
900 +        final CompletableFuture<Integer> g = m.whenComplete
901 +            (f,
902 +             (Integer x, Throwable t) -> {
903 +                m.checkExecutionMode();
904 +                threadAssertSame(x, v1);
905 +                threadAssertNull(t);
906 +                a.getAndIncrement();
907 +            });
908 +        if (createIncomplete) assertTrue(f.complete(v1));
909 +
910 +        checkCompletedNormally(g, v1);
911 +        checkCompletedNormally(f, v1);
912 +        assertEquals(1, a.get());
913 +    }}
914 +
915 +    /**
916 +     * whenComplete action executes on exceptional completion, propagating
917 +     * source result.
918 +     */
919 +    public void testWhenComplete_exceptionalCompletion() {
920 +        for (ExecutionMode m : ExecutionMode.values())
921 +        for (boolean createIncomplete : new boolean[] { true, false })
922 +    {
923 +        final AtomicInteger a = new AtomicInteger(0);
924 +        final CFException ex = new CFException();
925 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
926 +        if (!createIncomplete) f.completeExceptionally(ex);
927 +        final CompletableFuture<Integer> g = m.whenComplete
928 +            (f,
929 +             (Integer x, Throwable t) -> {
930 +                m.checkExecutionMode();
931 +                threadAssertNull(x);
932 +                threadAssertSame(t, ex);
933 +                a.getAndIncrement();
934 +            });
935 +        if (createIncomplete) f.completeExceptionally(ex);
936 +
937 +        checkCompletedWithWrappedException(g, ex);
938 +        checkCompletedExceptionally(f, ex);
939 +        assertEquals(1, a.get());
940 +    }}
941 +
942 +    /**
943 +     * whenComplete action executes on cancelled source, propagating
944 +     * CancellationException.
945 +     */
946 +    public void testWhenComplete_sourceCancelled() {
947 +        for (ExecutionMode m : ExecutionMode.values())
948 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
949 +        for (boolean createIncomplete : new boolean[] { true, false })
950 +    {
951 +        final AtomicInteger a = new AtomicInteger(0);
952 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
953 +        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
954 +        final CompletableFuture<Integer> g = m.whenComplete
955 +            (f,
956 +             (Integer x, Throwable t) -> {
957 +                m.checkExecutionMode();
958 +                threadAssertNull(x);
959 +                threadAssertTrue(t instanceof CancellationException);
960 +                a.getAndIncrement();
961 +            });
962 +        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
963 +
964 +        checkCompletedWithWrappedCancellationException(g);
965 +        checkCancelled(f);
966 +        assertEquals(1, a.get());
967 +    }}
968 +
969 +    /**
970 +     * If a whenComplete action throws an exception when triggered by
971 +     * a normal completion, it completes exceptionally
972 +     */
973 +    public void testWhenComplete_actionFailed() {
974 +        for (boolean createIncomplete : new boolean[] { true, false })
975 +        for (ExecutionMode m : ExecutionMode.values())
976 +        for (Integer v1 : new Integer[] { 1, null })
977 +    {
978 +        final AtomicInteger a = new AtomicInteger(0);
979 +        final CFException ex = new CFException();
980 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
981 +        if (!createIncomplete) assertTrue(f.complete(v1));
982 +        final CompletableFuture<Integer> g = m.whenComplete
983 +            (f,
984 +             (Integer x, Throwable t) -> {
985 +                m.checkExecutionMode();
986 +                threadAssertSame(x, v1);
987 +                threadAssertNull(t);
988 +                a.getAndIncrement();
989 +                throw ex;
990 +            });
991 +        if (createIncomplete) assertTrue(f.complete(v1));
992 +
993 +        checkCompletedWithWrappedException(g, ex);
994 +        checkCompletedNormally(f, v1);
995 +        assertEquals(1, a.get());
996 +    }}
997 +
998 +    /**
999 +     * If a whenComplete action throws an exception when triggered by
1000 +     * a source completion that also throws an exception, the source
1001 +     * exception takes precedence.
1002 +     */
1003 +    public void testWhenComplete_actionFailedSourceFailed() {
1004 +        for (boolean createIncomplete : new boolean[] { true, false })
1005 +        for (ExecutionMode m : ExecutionMode.values())
1006 +    {
1007 +        final AtomicInteger a = new AtomicInteger(0);
1008 +        final CFException ex1 = new CFException();
1009 +        final CFException ex2 = new CFException();
1010 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1011 +
1012 +        if (!createIncomplete) f.completeExceptionally(ex1);
1013 +        final CompletableFuture<Integer> g = m.whenComplete
1014 +            (f,
1015 +             (Integer x, Throwable t) -> {
1016 +                m.checkExecutionMode();
1017 +                threadAssertSame(t, ex1);
1018 +                threadAssertNull(x);
1019 +                a.getAndIncrement();
1020 +                throw ex2;
1021 +            });
1022 +        if (createIncomplete) f.completeExceptionally(ex1);
1023 +
1024 +        checkCompletedWithWrappedException(g, ex1);
1025 +        checkCompletedExceptionally(f, ex1);
1026 +        assertEquals(1, a.get());
1027 +    }}
1028 +
1029 +    /**
1030 +     * handle action completes normally with function value on normal
1031 +     * completion of source
1032 +     */
1033 +    public void testHandle_normalCompletion() {
1034 +        for (ExecutionMode m : ExecutionMode.values())
1035 +        for (boolean createIncomplete : new boolean[] { true, false })
1036 +        for (Integer v1 : new Integer[] { 1, null })
1037 +    {
1038 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1039 +        final AtomicInteger a = new AtomicInteger(0);
1040 +        if (!createIncomplete) assertTrue(f.complete(v1));
1041 +        final CompletableFuture<Integer> g = m.handle
1042 +            (f,
1043 +             (Integer x, Throwable t) -> {
1044 +                m.checkExecutionMode();
1045 +                threadAssertSame(x, v1);
1046 +                threadAssertNull(t);
1047 +                a.getAndIncrement();
1048 +                return inc(v1);
1049 +            });
1050 +        if (createIncomplete) assertTrue(f.complete(v1));
1051 +
1052 +        checkCompletedNormally(g, inc(v1));
1053 +        checkCompletedNormally(f, v1);
1054 +        assertEquals(1, a.get());
1055 +    }}
1056 +
1057 +    /**
1058 +     * handle action completes normally with function value on
1059 +     * exceptional completion of source
1060 +     */
1061 +    public void testHandle_exceptionalCompletion() {
1062 +        for (ExecutionMode m : ExecutionMode.values())
1063 +        for (boolean createIncomplete : new boolean[] { true, false })
1064 +        for (Integer v1 : new Integer[] { 1, null })
1065 +    {
1066 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1067 +        final AtomicInteger a = new AtomicInteger(0);
1068 +        final CFException ex = new CFException();
1069 +        if (!createIncomplete) f.completeExceptionally(ex);
1070 +        final CompletableFuture<Integer> g = m.handle
1071 +            (f,
1072 +             (Integer x, Throwable t) -> {
1073 +                m.checkExecutionMode();
1074 +                threadAssertNull(x);
1075 +                threadAssertSame(t, ex);
1076 +                a.getAndIncrement();
1077 +                return v1;
1078 +            });
1079 +        if (createIncomplete) f.completeExceptionally(ex);
1080 +
1081 +        checkCompletedNormally(g, v1);
1082 +        checkCompletedExceptionally(f, ex);
1083 +        assertEquals(1, a.get());
1084 +    }}
1085 +
1086 +    /**
1087 +     * handle action completes normally with function value on
1088 +     * cancelled source
1089 +     */
1090 +    public void testHandle_sourceCancelled() {
1091 +        for (ExecutionMode m : ExecutionMode.values())
1092 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1093 +        for (boolean createIncomplete : new boolean[] { true, false })
1094 +        for (Integer v1 : new Integer[] { 1, null })
1095 +    {
1096 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1097 +        final AtomicInteger a = new AtomicInteger(0);
1098 +        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1099 +        final CompletableFuture<Integer> g = m.handle
1100 +            (f,
1101 +             (Integer x, Throwable t) -> {
1102 +                m.checkExecutionMode();
1103 +                threadAssertNull(x);
1104 +                threadAssertTrue(t instanceof CancellationException);
1105 +                a.getAndIncrement();
1106 +                return v1;
1107 +            });
1108 +        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1109 +
1110 +        checkCompletedNormally(g, v1);
1111 +        checkCancelled(f);
1112 +        assertEquals(1, a.get());
1113 +    }}
1114 +
1115 +    /**
1116 +     * handle result completes exceptionally if action does
1117 +     */
1118 +    public void testHandle_sourceFailedActionFailed() {
1119 +        for (ExecutionMode m : ExecutionMode.values())
1120 +        for (boolean createIncomplete : new boolean[] { true, false })
1121 +    {
1122 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1123 +        final AtomicInteger a = new AtomicInteger(0);
1124 +        final CFException ex1 = new CFException();
1125 +        final CFException ex2 = new CFException();
1126 +        if (!createIncomplete) f.completeExceptionally(ex1);
1127 +        final CompletableFuture<Integer> g = m.handle
1128 +            (f,
1129 +             (Integer x, Throwable t) -> {
1130 +                m.checkExecutionMode();
1131 +                threadAssertNull(x);
1132 +                threadAssertSame(ex1, t);
1133 +                a.getAndIncrement();
1134 +                throw ex2;
1135 +            });
1136 +        if (createIncomplete) f.completeExceptionally(ex1);
1137 +
1138 +        checkCompletedWithWrappedException(g, ex2);
1139 +        checkCompletedExceptionally(f, ex1);
1140 +        assertEquals(1, a.get());
1141 +    }}
1142 +
1143 +    public void testHandle_sourceCompletedNormallyActionFailed() {
1144 +        for (ExecutionMode m : ExecutionMode.values())
1145 +        for (boolean createIncomplete : new boolean[] { true, false })
1146 +        for (Integer v1 : new Integer[] { 1, null })
1147 +    {
1148 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1149 +        final AtomicInteger a = new AtomicInteger(0);
1150 +        final CFException ex = new CFException();
1151 +        if (!createIncomplete) assertTrue(f.complete(v1));
1152 +        final CompletableFuture<Integer> g = m.handle
1153 +            (f,
1154 +             (Integer x, Throwable t) -> {
1155 +                m.checkExecutionMode();
1156 +                threadAssertSame(x, v1);
1157 +                threadAssertNull(t);
1158 +                a.getAndIncrement();
1159 +                throw ex;
1160 +            });
1161 +        if (createIncomplete) assertTrue(f.complete(v1));
1162 +
1163 +        checkCompletedWithWrappedException(g, ex);
1164 +        checkCompletedNormally(f, v1);
1165 +        assertEquals(1, a.get());
1166 +    }}
1167 +
1168 +    /**
1169 +     * runAsync completes after running Runnable
1170 +     */
1171 +    public void testRunAsync_normalCompletion() {
1172 +        ExecutionMode[] executionModes = {
1173 +            ExecutionMode.ASYNC,
1174 +            ExecutionMode.EXECUTOR,
1175 +        };
1176 +        for (ExecutionMode m : executionModes)
1177 +    {
1178 +        final Noop r = new Noop(m);
1179 +        final CompletableFuture<Void> f = m.runAsync(r);
1180 +        assertNull(f.join());
1181 +        checkCompletedNormally(f, null);
1182 +        r.assertInvoked();
1183 +    }}
1184 +
1185 +    /**
1186 +     * failing runAsync completes exceptionally after running Runnable
1187 +     */
1188 +    public void testRunAsync_exceptionalCompletion() {
1189 +        ExecutionMode[] executionModes = {
1190 +            ExecutionMode.ASYNC,
1191 +            ExecutionMode.EXECUTOR,
1192 +        };
1193 +        for (ExecutionMode m : executionModes)
1194 +    {
1195 +        final FailingRunnable r = new FailingRunnable(m);
1196 +        final CompletableFuture<Void> f = m.runAsync(r);
1197 +        checkCompletedWithWrappedCFException(f);
1198 +        r.assertInvoked();
1199 +    }}
1200 +
1201 +    /**
1202 +     * supplyAsync completes with result of supplier
1203 +     */
1204 +    public void testSupplyAsync_normalCompletion() {
1205 +        ExecutionMode[] executionModes = {
1206 +            ExecutionMode.ASYNC,
1207 +            ExecutionMode.EXECUTOR,
1208 +        };
1209 +        for (ExecutionMode m : executionModes)
1210 +        for (Integer v1 : new Integer[] { 1, null })
1211 +    {
1212 +        final IntegerSupplier r = new IntegerSupplier(m, v1);
1213 +        final CompletableFuture<Integer> f = m.supplyAsync(r);
1214 +        assertSame(v1, f.join());
1215 +        checkCompletedNormally(f, v1);
1216 +        r.assertInvoked();
1217 +    }}
1218 +
1219 +    /**
1220 +     * Failing supplyAsync completes exceptionally
1221 +     */
1222 +    public void testSupplyAsync_exceptionalCompletion() {
1223 +        ExecutionMode[] executionModes = {
1224 +            ExecutionMode.ASYNC,
1225 +            ExecutionMode.EXECUTOR,
1226 +        };
1227 +        for (ExecutionMode m : executionModes)
1228 +    {
1229 +        FailingSupplier r = new FailingSupplier(m);
1230 +        CompletableFuture<Integer> f = m.supplyAsync(r);
1231 +        checkCompletedWithWrappedCFException(f);
1232 +        r.assertInvoked();
1233 +    }}
1234 +
1235 +    // seq completion methods
1236 +
1237 +    /**
1238 +     * thenRun result completes normally after normal completion of source
1239 +     */
1240 +    public void testThenRun_normalCompletion() {
1241 +        for (ExecutionMode m : ExecutionMode.values())
1242 +        for (Integer v1 : new Integer[] { 1, null })
1243 +    {
1244 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1245 +        final Noop[] rs = new Noop[6];
1246 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1247 +
1248 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1249 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1250 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1251 +        checkIncomplete(h0);
1252 +        checkIncomplete(h1);
1253 +        checkIncomplete(h2);
1254 +        assertTrue(f.complete(v1));
1255 +        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1256 +        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1257 +        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1258 +
1259 +        checkCompletedNormally(h0, null);
1260 +        checkCompletedNormally(h1, null);
1261 +        checkCompletedNormally(h2, null);
1262 +        checkCompletedNormally(h3, null);
1263 +        checkCompletedNormally(h4, null);
1264 +        checkCompletedNormally(h5, null);
1265 +        checkCompletedNormally(f, v1);
1266 +        for (Noop r : rs) r.assertInvoked();
1267 +    }}
1268 +
1269 +    /**
1270 +     * thenRun result completes exceptionally after exceptional
1271 +     * completion of source
1272 +     */
1273 +    public void testThenRun_exceptionalCompletion() {
1274 +        for (ExecutionMode m : ExecutionMode.values())
1275 +    {
1276 +        final CFException ex = new CFException();
1277 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1278 +        final Noop[] rs = new Noop[6];
1279 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1280 +
1281 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1282 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1283 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1284 +        checkIncomplete(h0);
1285 +        checkIncomplete(h1);
1286 +        checkIncomplete(h2);
1287 +        assertTrue(f.completeExceptionally(ex));
1288 +        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1289 +        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1290 +        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1291 +
1292 +        checkCompletedWithWrappedException(h0, ex);
1293 +        checkCompletedWithWrappedException(h1, ex);
1294 +        checkCompletedWithWrappedException(h2, ex);
1295 +        checkCompletedWithWrappedException(h3, ex);
1296 +        checkCompletedWithWrappedException(h4, ex);
1297 +        checkCompletedWithWrappedException(h5, ex);
1298 +        checkCompletedExceptionally(f, ex);
1299 +        for (Noop r : rs) r.assertNotInvoked();
1300 +    }}
1301 +
1302 +    /**
1303 +     * thenRun result completes exceptionally if source cancelled
1304 +     */
1305 +    public void testThenRun_sourceCancelled() {
1306 +        for (ExecutionMode m : ExecutionMode.values())
1307 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1308 +    {
1309 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1310 +        final Noop[] rs = new Noop[6];
1311 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1312 +
1313 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1314 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1315 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1316 +        checkIncomplete(h0);
1317 +        checkIncomplete(h1);
1318 +        checkIncomplete(h2);
1319 +        assertTrue(f.cancel(mayInterruptIfRunning));
1320 +        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1321 +        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1322 +        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1323 +
1324 +        checkCompletedWithWrappedCancellationException(h0);
1325 +        checkCompletedWithWrappedCancellationException(h1);
1326 +        checkCompletedWithWrappedCancellationException(h2);
1327 +        checkCompletedWithWrappedCancellationException(h3);
1328 +        checkCompletedWithWrappedCancellationException(h4);
1329 +        checkCompletedWithWrappedCancellationException(h5);
1330 +        checkCancelled(f);
1331 +        for (Noop r : rs) r.assertNotInvoked();
1332 +    }}
1333 +
1334 +    /**
1335 +     * thenRun result completes exceptionally if action does
1336 +     */
1337 +    public void testThenRun_actionFailed() {
1338 +        for (ExecutionMode m : ExecutionMode.values())
1339 +        for (Integer v1 : new Integer[] { 1, null })
1340 +    {
1341 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1342 +        final FailingRunnable[] rs = new FailingRunnable[6];
1343 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
1344 +
1345 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1346 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1347 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1348 +        assertTrue(f.complete(v1));
1349 +        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1350 +        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1351 +        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1352 +
1353 +        checkCompletedWithWrappedCFException(h0);
1354 +        checkCompletedWithWrappedCFException(h1);
1355 +        checkCompletedWithWrappedCFException(h2);
1356 +        checkCompletedWithWrappedCFException(h3);
1357 +        checkCompletedWithWrappedCFException(h4);
1358 +        checkCompletedWithWrappedCFException(h5);
1359 +        checkCompletedNormally(f, v1);
1360 +    }}
1361 +
1362 +    /**
1363 +     * thenApply result completes normally after normal completion of source
1364 +     */
1365 +    public void testThenApply_normalCompletion() {
1366 +        for (ExecutionMode m : ExecutionMode.values())
1367 +        for (Integer v1 : new Integer[] { 1, null })
1368 +    {
1369 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1370 +        final IncFunction[] rs = new IncFunction[4];
1371 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1372 +
1373 +        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1374 +        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1375 +        checkIncomplete(h0);
1376 +        checkIncomplete(h1);
1377 +        assertTrue(f.complete(v1));
1378 +        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1379 +        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1380 +
1381 +        checkCompletedNormally(h0, inc(v1));
1382 +        checkCompletedNormally(h1, inc(v1));
1383 +        checkCompletedNormally(h2, inc(v1));
1384 +        checkCompletedNormally(h3, inc(v1));
1385 +        checkCompletedNormally(f, v1);
1386 +        for (IncFunction r : rs) r.assertValue(inc(v1));
1387 +    }}
1388 +
1389 +    /**
1390 +     * thenApply result completes exceptionally after exceptional
1391 +     * completion of source
1392 +     */
1393 +    public void testThenApply_exceptionalCompletion() {
1394 +        for (ExecutionMode m : ExecutionMode.values())
1395 +    {
1396 +        final CFException ex = new CFException();
1397 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1398 +        final IncFunction[] rs = new IncFunction[4];
1399 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1400 +
1401 +        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1402 +        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1403 +        assertTrue(f.completeExceptionally(ex));
1404 +        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1405 +        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1406 +
1407 +        checkCompletedWithWrappedException(h0, ex);
1408 +        checkCompletedWithWrappedException(h1, ex);
1409 +        checkCompletedWithWrappedException(h2, ex);
1410 +        checkCompletedWithWrappedException(h3, ex);
1411 +        checkCompletedExceptionally(f, ex);
1412 +        for (IncFunction r : rs) r.assertNotInvoked();
1413 +    }}
1414 +
1415 +    /**
1416 +     * thenApply result completes exceptionally if source cancelled
1417 +     */
1418 +    public void testThenApply_sourceCancelled() {
1419 +        for (ExecutionMode m : ExecutionMode.values())
1420 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1421 +    {
1422 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1423 +        final IncFunction[] rs = new IncFunction[4];
1424 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1425 +
1426 +        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1427 +        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1428 +        assertTrue(f.cancel(mayInterruptIfRunning));
1429 +        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1430 +        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1431 +
1432 +        checkCompletedWithWrappedCancellationException(h0);
1433 +        checkCompletedWithWrappedCancellationException(h1);
1434 +        checkCompletedWithWrappedCancellationException(h2);
1435 +        checkCompletedWithWrappedCancellationException(h3);
1436 +        checkCancelled(f);
1437 +        for (IncFunction r : rs) r.assertNotInvoked();
1438 +    }}
1439 +
1440 +    /**
1441 +     * thenApply result completes exceptionally if action does
1442 +     */
1443 +    public void testThenApply_actionFailed() {
1444 +        for (ExecutionMode m : ExecutionMode.values())
1445 +        for (Integer v1 : new Integer[] { 1, null })
1446 +    {
1447 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1448 +        final FailingFunction[] rs = new FailingFunction[4];
1449 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
1450 +
1451 +        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1452 +        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1453 +        assertTrue(f.complete(v1));
1454 +        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1455 +        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1456 +
1457 +        checkCompletedWithWrappedCFException(h0);
1458 +        checkCompletedWithWrappedCFException(h1);
1459 +        checkCompletedWithWrappedCFException(h2);
1460 +        checkCompletedWithWrappedCFException(h3);
1461 +        checkCompletedNormally(f, v1);
1462 +    }}
1463 +
1464 +    /**
1465 +     * thenAccept result completes normally after normal completion of source
1466 +     */
1467 +    public void testThenAccept_normalCompletion() {
1468 +        for (ExecutionMode m : ExecutionMode.values())
1469 +        for (Integer v1 : new Integer[] { 1, null })
1470 +    {
1471 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1472 +        final NoopConsumer[] rs = new NoopConsumer[4];
1473 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1474 +
1475 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1476 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1477 +        checkIncomplete(h0);
1478 +        checkIncomplete(h1);
1479 +        assertTrue(f.complete(v1));
1480 +        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1481 +        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1482 +
1483 +        checkCompletedNormally(h0, null);
1484 +        checkCompletedNormally(h1, null);
1485 +        checkCompletedNormally(h2, null);
1486 +        checkCompletedNormally(h3, null);
1487 +        checkCompletedNormally(f, v1);
1488 +        for (NoopConsumer r : rs) r.assertValue(v1);
1489 +    }}
1490 +
1491 +    /**
1492 +     * thenAccept result completes exceptionally after exceptional
1493 +     * completion of source
1494 +     */
1495 +    public void testThenAccept_exceptionalCompletion() {
1496 +        for (ExecutionMode m : ExecutionMode.values())
1497 +    {
1498 +        final CFException ex = new CFException();
1499 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1500 +        final NoopConsumer[] rs = new NoopConsumer[4];
1501 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1502 +
1503 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1504 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1505 +        assertTrue(f.completeExceptionally(ex));
1506 +        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1507 +        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1508 +
1509 +        checkCompletedWithWrappedException(h0, ex);
1510 +        checkCompletedWithWrappedException(h1, ex);
1511 +        checkCompletedWithWrappedException(h2, ex);
1512 +        checkCompletedWithWrappedException(h3, ex);
1513 +        checkCompletedExceptionally(f, ex);
1514 +        for (NoopConsumer r : rs) r.assertNotInvoked();
1515 +    }}
1516 +
1517 +    /**
1518 +     * thenAccept result completes exceptionally if source cancelled
1519 +     */
1520 +    public void testThenAccept_sourceCancelled() {
1521 +        for (ExecutionMode m : ExecutionMode.values())
1522 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1523 +    {
1524 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1525 +        final NoopConsumer[] rs = new NoopConsumer[4];
1526 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1527 +
1528 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1529 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1530 +        assertTrue(f.cancel(mayInterruptIfRunning));
1531 +        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1532 +        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1533 +
1534 +        checkCompletedWithWrappedCancellationException(h0);
1535 +        checkCompletedWithWrappedCancellationException(h1);
1536 +        checkCompletedWithWrappedCancellationException(h2);
1537 +        checkCompletedWithWrappedCancellationException(h3);
1538 +        checkCancelled(f);
1539 +        for (NoopConsumer r : rs) r.assertNotInvoked();
1540 +    }}
1541 +
1542 +    /**
1543 +     * thenAccept result completes exceptionally if action does
1544 +     */
1545 +    public void testThenAccept_actionFailed() {
1546 +        for (ExecutionMode m : ExecutionMode.values())
1547 +        for (Integer v1 : new Integer[] { 1, null })
1548 +    {
1549 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1550 +        final FailingConsumer[] rs = new FailingConsumer[4];
1551 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
1552 +
1553 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1554 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1555 +        assertTrue(f.complete(v1));
1556 +        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1557 +        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1558 +
1559 +        checkCompletedWithWrappedCFException(h0);
1560 +        checkCompletedWithWrappedCFException(h1);
1561 +        checkCompletedWithWrappedCFException(h2);
1562 +        checkCompletedWithWrappedCFException(h3);
1563 +        checkCompletedNormally(f, v1);
1564 +    }}
1565 +
1566 +    /**
1567 +     * thenCombine result completes normally after normal completion
1568 +     * of sources
1569 +     */
1570 +    public void testThenCombine_normalCompletion() {
1571 +        for (ExecutionMode m : ExecutionMode.values())
1572 +        for (boolean fFirst : new boolean[] { true, false })
1573 +        for (Integer v1 : new Integer[] { 1, null })
1574 +        for (Integer v2 : new Integer[] { 2, null })
1575 +    {
1576 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1577 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1578 +        final SubtractFunction[] rs = new SubtractFunction[6];
1579 +        for (int i = 0; i < rs.length; i++) rs[i] = new SubtractFunction(m);
1580 +
1581 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1582 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1583 +        final Integer w1 =  fFirst ? v1 : v2;
1584 +        final Integer w2 = !fFirst ? v1 : v2;
1585 +
1586 +        final CompletableFuture<Integer> h0 = m.thenCombine(f, g, rs[0]);
1587 +        final CompletableFuture<Integer> h1 = m.thenCombine(fst, fst, rs[1]);
1588 +        assertTrue(fst.complete(w1));
1589 +        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, rs[2]);
1590 +        final CompletableFuture<Integer> h3 = m.thenCombine(fst, fst, rs[3]);
1591 +        checkIncomplete(h0); rs[0].assertNotInvoked();
1592 +        checkIncomplete(h2); rs[2].assertNotInvoked();
1593 +        checkCompletedNormally(h1, subtract(w1, w1));
1594 +        checkCompletedNormally(h3, subtract(w1, w1));
1595 +        rs[1].assertValue(subtract(w1, w1));
1596 +        rs[3].assertValue(subtract(w1, w1));
1597 +        assertTrue(snd.complete(w2));
1598 +        final CompletableFuture<Integer> h4 = m.thenCombine(f, g, rs[4]);
1599 +
1600 +        checkCompletedNormally(h0, subtract(v1, v2));
1601 +        checkCompletedNormally(h2, subtract(v1, v2));
1602 +        checkCompletedNormally(h4, subtract(v1, v2));
1603 +        rs[0].assertValue(subtract(v1, v2));
1604 +        rs[2].assertValue(subtract(v1, v2));
1605 +        rs[4].assertValue(subtract(v1, v2));
1606 +
1607 +        checkCompletedNormally(f, v1);
1608 +        checkCompletedNormally(g, v2);
1609 +    }}
1610 +
1611 +    /**
1612 +     * thenCombine result completes exceptionally after exceptional
1613 +     * completion of either source
1614 +     */
1615 +    public void testThenCombine_exceptionalCompletion() throws Throwable {
1616 +        for (ExecutionMode m : ExecutionMode.values())
1617 +        for (boolean fFirst : new boolean[] { true, false })
1618 +        for (boolean failFirst : new boolean[] { true, false })
1619 +        for (Integer v1 : new Integer[] { 1, null })
1620 +    {
1621 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1622 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1623 +        final CFException ex = new CFException();
1624 +        final SubtractFunction r1 = new SubtractFunction(m);
1625 +        final SubtractFunction r2 = new SubtractFunction(m);
1626 +        final SubtractFunction r3 = new SubtractFunction(m);
1627 +
1628 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1629 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1630 +        final Callable<Boolean> complete1 = failFirst ?
1631 +            () -> fst.completeExceptionally(ex) :
1632 +            () -> fst.complete(v1);
1633 +        final Callable<Boolean> complete2 = failFirst ?
1634 +            () -> snd.complete(v1) :
1635 +            () -> snd.completeExceptionally(ex);
1636 +
1637 +        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1638 +        assertTrue(complete1.call());
1639 +        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1640 +        checkIncomplete(h1);
1641 +        checkIncomplete(h2);
1642 +        assertTrue(complete2.call());
1643 +        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1644 +
1645 +        checkCompletedWithWrappedException(h1, ex);
1646 +        checkCompletedWithWrappedException(h2, ex);
1647 +        checkCompletedWithWrappedException(h3, ex);
1648 +        r1.assertNotInvoked();
1649 +        r2.assertNotInvoked();
1650 +        r3.assertNotInvoked();
1651 +        checkCompletedNormally(failFirst ? snd : fst, v1);
1652 +        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1653 +    }}
1654 +
1655 +    /**
1656 +     * thenCombine result completes exceptionally if either source cancelled
1657 +     */
1658 +    public void testThenCombine_sourceCancelled() throws Throwable {
1659 +        for (ExecutionMode m : ExecutionMode.values())
1660 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1661 +        for (boolean fFirst : new boolean[] { true, false })
1662 +        for (boolean failFirst : new boolean[] { true, false })
1663 +        for (Integer v1 : new Integer[] { 1, null })
1664 +    {
1665 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1666 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1667 +        final SubtractFunction r1 = new SubtractFunction(m);
1668 +        final SubtractFunction r2 = new SubtractFunction(m);
1669 +        final SubtractFunction r3 = new SubtractFunction(m);
1670 +
1671 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1672 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1673 +        final Callable<Boolean> complete1 = failFirst ?
1674 +            () -> fst.cancel(mayInterruptIfRunning) :
1675 +            () -> fst.complete(v1);
1676 +        final Callable<Boolean> complete2 = failFirst ?
1677 +            () -> snd.complete(v1) :
1678 +            () -> snd.cancel(mayInterruptIfRunning);
1679 +
1680 +        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1681 +        assertTrue(complete1.call());
1682 +        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1683 +        checkIncomplete(h1);
1684 +        checkIncomplete(h2);
1685 +        assertTrue(complete2.call());
1686 +        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1687 +
1688 +        checkCompletedWithWrappedCancellationException(h1);
1689 +        checkCompletedWithWrappedCancellationException(h2);
1690 +        checkCompletedWithWrappedCancellationException(h3);
1691 +        r1.assertNotInvoked();
1692 +        r2.assertNotInvoked();
1693 +        r3.assertNotInvoked();
1694 +        checkCompletedNormally(failFirst ? snd : fst, v1);
1695 +        checkCancelled(failFirst ? fst : snd);
1696 +    }}
1697 +
1698 +    /**
1699 +     * thenCombine result completes exceptionally if action does
1700 +     */
1701 +    public void testThenCombine_actionFailed() {
1702 +        for (ExecutionMode m : ExecutionMode.values())
1703 +        for (boolean fFirst : new boolean[] { true, false })
1704 +        for (Integer v1 : new Integer[] { 1, null })
1705 +        for (Integer v2 : new Integer[] { 2, null })
1706 +    {
1707 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1708 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1709 +        final FailingBiFunction r1 = new FailingBiFunction(m);
1710 +        final FailingBiFunction r2 = new FailingBiFunction(m);
1711 +        final FailingBiFunction r3 = new FailingBiFunction(m);
1712 +
1713 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1714 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1715 +        final Integer w1 =  fFirst ? v1 : v2;
1716 +        final Integer w2 = !fFirst ? v1 : v2;
1717 +
1718 +        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1719 +        assertTrue(fst.complete(w1));
1720 +        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1721 +        assertTrue(snd.complete(w2));
1722 +        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1723 +
1724 +        checkCompletedWithWrappedCFException(h1);
1725 +        checkCompletedWithWrappedCFException(h2);
1726 +        checkCompletedWithWrappedCFException(h3);
1727 +        r1.assertInvoked();
1728 +        r2.assertInvoked();
1729 +        r3.assertInvoked();
1730 +        checkCompletedNormally(f, v1);
1731 +        checkCompletedNormally(g, v2);
1732 +    }}
1733 +
1734 +    /**
1735 +     * thenAcceptBoth result completes normally after normal
1736 +     * completion of sources
1737 +     */
1738 +    public void testThenAcceptBoth_normalCompletion() {
1739 +        for (ExecutionMode m : ExecutionMode.values())
1740 +        for (boolean fFirst : new boolean[] { true, false })
1741 +        for (Integer v1 : new Integer[] { 1, null })
1742 +        for (Integer v2 : new Integer[] { 2, null })
1743 +    {
1744 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1745 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1746 +        final SubtractAction r1 = new SubtractAction(m);
1747 +        final SubtractAction r2 = new SubtractAction(m);
1748 +        final SubtractAction r3 = new SubtractAction(m);
1749 +
1750 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1751 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1752 +        final Integer w1 =  fFirst ? v1 : v2;
1753 +        final Integer w2 = !fFirst ? v1 : v2;
1754 +
1755 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1756 +        assertTrue(fst.complete(w1));
1757 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1758 +        checkIncomplete(h1);
1759 +        checkIncomplete(h2);
1760 +        r1.assertNotInvoked();
1761 +        r2.assertNotInvoked();
1762 +        assertTrue(snd.complete(w2));
1763 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1764 +
1765 +        checkCompletedNormally(h1, null);
1766 +        checkCompletedNormally(h2, null);
1767 +        checkCompletedNormally(h3, null);
1768 +        r1.assertValue(subtract(v1, v2));
1769 +        r2.assertValue(subtract(v1, v2));
1770 +        r3.assertValue(subtract(v1, v2));
1771 +        checkCompletedNormally(f, v1);
1772 +        checkCompletedNormally(g, v2);
1773 +    }}
1774 +
1775 +    /**
1776 +     * thenAcceptBoth result completes exceptionally after exceptional
1777 +     * completion of either source
1778 +     */
1779 +    public void testThenAcceptBoth_exceptionalCompletion() throws Throwable {
1780 +        for (ExecutionMode m : ExecutionMode.values())
1781 +        for (boolean fFirst : new boolean[] { true, false })
1782 +        for (boolean failFirst : new boolean[] { true, false })
1783 +        for (Integer v1 : new Integer[] { 1, null })
1784 +    {
1785 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1786 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1787 +        final CFException ex = new CFException();
1788 +        final SubtractAction r1 = new SubtractAction(m);
1789 +        final SubtractAction r2 = new SubtractAction(m);
1790 +        final SubtractAction r3 = new SubtractAction(m);
1791 +
1792 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1793 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1794 +        final Callable<Boolean> complete1 = failFirst ?
1795 +            () -> fst.completeExceptionally(ex) :
1796 +            () -> fst.complete(v1);
1797 +        final Callable<Boolean> complete2 = failFirst ?
1798 +            () -> snd.complete(v1) :
1799 +            () -> snd.completeExceptionally(ex);
1800 +
1801 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1802 +        assertTrue(complete1.call());
1803 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1804 +        checkIncomplete(h1);
1805 +        checkIncomplete(h2);
1806 +        assertTrue(complete2.call());
1807 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1808 +
1809 +        checkCompletedWithWrappedException(h1, ex);
1810 +        checkCompletedWithWrappedException(h2, ex);
1811 +        checkCompletedWithWrappedException(h3, ex);
1812 +        r1.assertNotInvoked();
1813 +        r2.assertNotInvoked();
1814 +        r3.assertNotInvoked();
1815 +        checkCompletedNormally(failFirst ? snd : fst, v1);
1816 +        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1817 +    }}
1818 +
1819 +    /**
1820 +     * thenAcceptBoth result completes exceptionally if either source cancelled
1821 +     */
1822 +    public void testThenAcceptBoth_sourceCancelled() throws Throwable {
1823 +        for (ExecutionMode m : ExecutionMode.values())
1824 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1825 +        for (boolean fFirst : new boolean[] { true, false })
1826 +        for (boolean failFirst : new boolean[] { true, false })
1827 +        for (Integer v1 : new Integer[] { 1, null })
1828 +    {
1829 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1830 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1831 +        final SubtractAction r1 = new SubtractAction(m);
1832 +        final SubtractAction r2 = new SubtractAction(m);
1833 +        final SubtractAction r3 = new SubtractAction(m);
1834 +
1835 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1836 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1837 +        final Callable<Boolean> complete1 = failFirst ?
1838 +            () -> fst.cancel(mayInterruptIfRunning) :
1839 +            () -> fst.complete(v1);
1840 +        final Callable<Boolean> complete2 = failFirst ?
1841 +            () -> snd.complete(v1) :
1842 +            () -> snd.cancel(mayInterruptIfRunning);
1843 +
1844 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1845 +        assertTrue(complete1.call());
1846 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1847 +        checkIncomplete(h1);
1848 +        checkIncomplete(h2);
1849 +        assertTrue(complete2.call());
1850 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1851 +
1852 +        checkCompletedWithWrappedCancellationException(h1);
1853 +        checkCompletedWithWrappedCancellationException(h2);
1854 +        checkCompletedWithWrappedCancellationException(h3);
1855 +        r1.assertNotInvoked();
1856 +        r2.assertNotInvoked();
1857 +        r3.assertNotInvoked();
1858 +        checkCompletedNormally(failFirst ? snd : fst, v1);
1859 +        checkCancelled(failFirst ? fst : snd);
1860 +    }}
1861 +
1862 +    /**
1863 +     * thenAcceptBoth result completes exceptionally if action does
1864 +     */
1865 +    public void testThenAcceptBoth_actionFailed() {
1866 +        for (ExecutionMode m : ExecutionMode.values())
1867 +        for (boolean fFirst : new boolean[] { true, false })
1868 +        for (Integer v1 : new Integer[] { 1, null })
1869 +        for (Integer v2 : new Integer[] { 2, null })
1870 +    {
1871 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1872 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1873 +        final FailingBiConsumer r1 = new FailingBiConsumer(m);
1874 +        final FailingBiConsumer r2 = new FailingBiConsumer(m);
1875 +        final FailingBiConsumer r3 = new FailingBiConsumer(m);
1876 +
1877 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1878 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1879 +        final Integer w1 =  fFirst ? v1 : v2;
1880 +        final Integer w2 = !fFirst ? v1 : v2;
1881 +
1882 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1883 +        assertTrue(fst.complete(w1));
1884 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1885 +        assertTrue(snd.complete(w2));
1886 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1887 +
1888 +        checkCompletedWithWrappedCFException(h1);
1889 +        checkCompletedWithWrappedCFException(h2);
1890 +        checkCompletedWithWrappedCFException(h3);
1891 +        r1.assertInvoked();
1892 +        r2.assertInvoked();
1893 +        r3.assertInvoked();
1894 +        checkCompletedNormally(f, v1);
1895 +        checkCompletedNormally(g, v2);
1896 +    }}
1897 +
1898 +    /**
1899 +     * runAfterBoth result completes normally after normal
1900 +     * completion of sources
1901 +     */
1902 +    public void testRunAfterBoth_normalCompletion() {
1903 +        for (ExecutionMode m : ExecutionMode.values())
1904 +        for (boolean fFirst : new boolean[] { true, false })
1905 +        for (Integer v1 : new Integer[] { 1, null })
1906 +        for (Integer v2 : new Integer[] { 2, null })
1907 +    {
1908 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1909 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1910 +        final Noop r1 = new Noop(m);
1911 +        final Noop r2 = new Noop(m);
1912 +        final Noop r3 = new Noop(m);
1913 +
1914 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1915 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1916 +        final Integer w1 =  fFirst ? v1 : v2;
1917 +        final Integer w2 = !fFirst ? v1 : v2;
1918 +
1919 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
1920 +        assertTrue(fst.complete(w1));
1921 +        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
1922 +        checkIncomplete(h1);
1923 +        checkIncomplete(h2);
1924 +        r1.assertNotInvoked();
1925 +        r2.assertNotInvoked();
1926 +        assertTrue(snd.complete(w2));
1927 +        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
1928 +
1929 +        checkCompletedNormally(h1, null);
1930 +        checkCompletedNormally(h2, null);
1931 +        checkCompletedNormally(h3, null);
1932 +        r1.assertInvoked();
1933 +        r2.assertInvoked();
1934 +        r3.assertInvoked();
1935 +        checkCompletedNormally(f, v1);
1936 +        checkCompletedNormally(g, v2);
1937 +    }}
1938 +
1939 +    /**
1940 +     * runAfterBoth result completes exceptionally after exceptional
1941 +     * completion of either source
1942 +     */
1943 +    public void testRunAfterBoth_exceptionalCompletion() throws Throwable {
1944 +        for (ExecutionMode m : ExecutionMode.values())
1945 +        for (boolean fFirst : new boolean[] { true, false })
1946 +        for (boolean failFirst : new boolean[] { true, false })
1947 +        for (Integer v1 : new Integer[] { 1, null })
1948 +    {
1949 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1950 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1951 +        final CFException ex = new CFException();
1952 +        final Noop r1 = new Noop(m);
1953 +        final Noop r2 = new Noop(m);
1954 +        final Noop r3 = new Noop(m);
1955 +
1956 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1957 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1958 +        final Callable<Boolean> complete1 = failFirst ?
1959 +            () -> fst.completeExceptionally(ex) :
1960 +            () -> fst.complete(v1);
1961 +        final Callable<Boolean> complete2 = failFirst ?
1962 +            () -> snd.complete(v1) :
1963 +            () -> snd.completeExceptionally(ex);
1964 +
1965 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
1966 +        assertTrue(complete1.call());
1967 +        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
1968 +        checkIncomplete(h1);
1969 +        checkIncomplete(h2);
1970 +        assertTrue(complete2.call());
1971 +        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
1972 +
1973 +        checkCompletedWithWrappedException(h1, ex);
1974 +        checkCompletedWithWrappedException(h2, ex);
1975 +        checkCompletedWithWrappedException(h3, ex);
1976 +        r1.assertNotInvoked();
1977 +        r2.assertNotInvoked();
1978 +        r3.assertNotInvoked();
1979 +        checkCompletedNormally(failFirst ? snd : fst, v1);
1980 +        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1981 +    }}
1982 +
1983 +    /**
1984 +     * runAfterBoth result completes exceptionally if either source cancelled
1985 +     */
1986 +    public void testRunAfterBoth_sourceCancelled() throws Throwable {
1987 +        for (ExecutionMode m : ExecutionMode.values())
1988 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1989 +        for (boolean fFirst : new boolean[] { true, false })
1990 +        for (boolean failFirst : new boolean[] { true, false })
1991 +        for (Integer v1 : new Integer[] { 1, null })
1992 +    {
1993 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1994 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1995 +        final Noop r1 = new Noop(m);
1996 +        final Noop r2 = new Noop(m);
1997 +        final Noop r3 = new Noop(m);
1998 +
1999 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2000 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2001 +        final Callable<Boolean> complete1 = failFirst ?
2002 +            () -> fst.cancel(mayInterruptIfRunning) :
2003 +            () -> fst.complete(v1);
2004 +        final Callable<Boolean> complete2 = failFirst ?
2005 +            () -> snd.complete(v1) :
2006 +            () -> snd.cancel(mayInterruptIfRunning);
2007 +
2008 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2009 +        assertTrue(complete1.call());
2010 +        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2011 +        checkIncomplete(h1);
2012 +        checkIncomplete(h2);
2013 +        assertTrue(complete2.call());
2014 +        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2015 +
2016 +        checkCompletedWithWrappedCancellationException(h1);
2017 +        checkCompletedWithWrappedCancellationException(h2);
2018 +        checkCompletedWithWrappedCancellationException(h3);
2019 +        r1.assertNotInvoked();
2020 +        r2.assertNotInvoked();
2021 +        r3.assertNotInvoked();
2022 +        checkCompletedNormally(failFirst ? snd : fst, v1);
2023 +        checkCancelled(failFirst ? fst : snd);
2024 +    }}
2025 +
2026 +    /**
2027 +     * runAfterBoth result completes exceptionally if action does
2028 +     */
2029 +    public void testRunAfterBoth_actionFailed() {
2030 +        for (ExecutionMode m : ExecutionMode.values())
2031 +        for (boolean fFirst : new boolean[] { true, false })
2032 +        for (Integer v1 : new Integer[] { 1, null })
2033 +        for (Integer v2 : new Integer[] { 2, null })
2034 +    {
2035 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2036 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2037 +        final FailingRunnable r1 = new FailingRunnable(m);
2038 +        final FailingRunnable r2 = new FailingRunnable(m);
2039 +        final FailingRunnable r3 = new FailingRunnable(m);
2040 +
2041 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2042 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2043 +        final Integer w1 =  fFirst ? v1 : v2;
2044 +        final Integer w2 = !fFirst ? v1 : v2;
2045 +
2046 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2047 +        assertTrue(fst.complete(w1));
2048 +        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2049 +        assertTrue(snd.complete(w2));
2050 +        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2051 +
2052 +        checkCompletedWithWrappedCFException(h1);
2053 +        checkCompletedWithWrappedCFException(h2);
2054 +        checkCompletedWithWrappedCFException(h3);
2055 +        r1.assertInvoked();
2056 +        r2.assertInvoked();
2057 +        r3.assertInvoked();
2058 +        checkCompletedNormally(f, v1);
2059 +        checkCompletedNormally(g, v2);
2060 +    }}
2061 +
2062 +    /**
2063 +     * applyToEither result completes normally after normal completion
2064 +     * of either source
2065 +     */
2066 +    public void testApplyToEither_normalCompletion() {
2067 +        for (ExecutionMode m : ExecutionMode.values())
2068 +        for (Integer v1 : new Integer[] { 1, null })
2069 +        for (Integer v2 : new Integer[] { 2, null })
2070 +    {
2071 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2072 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2073 +        final IncFunction[] rs = new IncFunction[6];
2074 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2075 +
2076 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2077 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2078 +        checkIncomplete(h0);
2079 +        checkIncomplete(h1);
2080 +        rs[0].assertNotInvoked();
2081 +        rs[1].assertNotInvoked();
2082 +        f.complete(v1);
2083 +        checkCompletedNormally(h0, inc(v1));
2084 +        checkCompletedNormally(h1, inc(v1));
2085 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2086 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2087 +        checkCompletedNormally(h2, inc(v1));
2088 +        checkCompletedNormally(h3, inc(v1));
2089 +        g.complete(v2);
2090 +
2091 +        // unspecified behavior - both source completions available
2092 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2093 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2094 +        rs[4].assertValue(h4.join());
2095 +        rs[5].assertValue(h5.join());
2096 +        assertTrue(Objects.equals(inc(v1), h4.join()) ||
2097 +                   Objects.equals(inc(v2), h4.join()));
2098 +        assertTrue(Objects.equals(inc(v1), h5.join()) ||
2099 +                   Objects.equals(inc(v2), h5.join()));
2100 +
2101 +        checkCompletedNormally(f, v1);
2102 +        checkCompletedNormally(g, v2);
2103 +        checkCompletedNormally(h0, inc(v1));
2104 +        checkCompletedNormally(h1, inc(v1));
2105 +        checkCompletedNormally(h2, inc(v1));
2106 +        checkCompletedNormally(h3, inc(v1));
2107 +        for (int i = 0; i < 4; i++) rs[i].assertValue(inc(v1));
2108 +    }}
2109 +
2110 +    /**
2111 +     * applyToEither result completes exceptionally after exceptional
2112 +     * completion of either source
2113 +     */
2114 +    public void testApplyToEither_exceptionalCompletion() {
2115 +        for (ExecutionMode m : ExecutionMode.values())
2116 +        for (Integer v1 : new Integer[] { 1, null })
2117 +    {
2118 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2119 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2120 +        final CFException ex = new CFException();
2121 +        final IncFunction[] rs = new IncFunction[6];
2122 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2123 +
2124 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2125 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2126 +        checkIncomplete(h0);
2127 +        checkIncomplete(h1);
2128 +        rs[0].assertNotInvoked();
2129 +        rs[1].assertNotInvoked();
2130 +        f.completeExceptionally(ex);
2131 +        checkCompletedWithWrappedException(h0, ex);
2132 +        checkCompletedWithWrappedException(h1, ex);
2133 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2134 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2135 +        checkCompletedWithWrappedException(h2, ex);
2136 +        checkCompletedWithWrappedException(h3, ex);
2137 +        g.complete(v1);
2138 +
2139 +        // unspecified behavior - both source completions available
2140 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2141 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2142 +        try {
2143 +            assertEquals(inc(v1), h4.join());
2144 +            rs[4].assertValue(inc(v1));
2145 +        } catch (CompletionException ok) {
2146 +            checkCompletedWithWrappedException(h4, ex);
2147 +            rs[4].assertNotInvoked();
2148 +        }
2149 +        try {
2150 +            assertEquals(inc(v1), h5.join());
2151 +            rs[5].assertValue(inc(v1));
2152 +        } catch (CompletionException ok) {
2153 +            checkCompletedWithWrappedException(h5, ex);
2154 +            rs[5].assertNotInvoked();
2155 +        }
2156 +
2157 +        checkCompletedExceptionally(f, ex);
2158 +        checkCompletedNormally(g, v1);
2159 +        checkCompletedWithWrappedException(h0, ex);
2160 +        checkCompletedWithWrappedException(h1, ex);
2161 +        checkCompletedWithWrappedException(h2, ex);
2162 +        checkCompletedWithWrappedException(h3, ex);
2163 +        checkCompletedWithWrappedException(h4, ex);
2164 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2165 +    }}
2166 +
2167 +    public void testApplyToEither_exceptionalCompletion2() {
2168 +        for (ExecutionMode m : ExecutionMode.values())
2169 +        for (boolean fFirst : new boolean[] { true, false })
2170 +        for (Integer v1 : new Integer[] { 1, null })
2171 +    {
2172 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2173 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2174 +        final CFException ex = new CFException();
2175 +        final IncFunction[] rs = new IncFunction[6];
2176 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2177 +
2178 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2179 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2180 +        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2181 +        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2182 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2183 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2184 +
2185 +        // unspecified behavior - both source completions available
2186 +        try {
2187 +            assertEquals(inc(v1), h0.join());
2188 +            rs[0].assertValue(inc(v1));
2189 +        } catch (CompletionException ok) {
2190 +            checkCompletedWithWrappedException(h0, ex);
2191 +            rs[0].assertNotInvoked();
2192 +        }
2193 +        try {
2194 +            assertEquals(inc(v1), h1.join());
2195 +            rs[1].assertValue(inc(v1));
2196 +        } catch (CompletionException ok) {
2197 +            checkCompletedWithWrappedException(h1, ex);
2198 +            rs[1].assertNotInvoked();
2199 +        }
2200 +        try {
2201 +            assertEquals(inc(v1), h2.join());
2202 +            rs[2].assertValue(inc(v1));
2203 +        } catch (CompletionException ok) {
2204 +            checkCompletedWithWrappedException(h2, ex);
2205 +            rs[2].assertNotInvoked();
2206 +        }
2207 +        try {
2208 +            assertEquals(inc(v1), h3.join());
2209 +            rs[3].assertValue(inc(v1));
2210 +        } catch (CompletionException ok) {
2211 +            checkCompletedWithWrappedException(h3, ex);
2212 +            rs[3].assertNotInvoked();
2213 +        }
2214 +
2215 +        checkCompletedNormally(f, v1);
2216 +        checkCompletedExceptionally(g, ex);
2217 +    }}
2218 +
2219 +    /**
2220 +     * applyToEither result completes exceptionally if either source cancelled
2221 +     */
2222 +    public void testApplyToEither_sourceCancelled() {
2223 +        for (ExecutionMode m : ExecutionMode.values())
2224 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2225 +        for (Integer v1 : new Integer[] { 1, null })
2226 +    {
2227 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2228 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2229 +        final IncFunction[] rs = new IncFunction[6];
2230 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2231 +
2232 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2233 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2234 +        checkIncomplete(h0);
2235 +        checkIncomplete(h1);
2236 +        rs[0].assertNotInvoked();
2237 +        rs[1].assertNotInvoked();
2238 +        f.cancel(mayInterruptIfRunning);
2239 +        checkCompletedWithWrappedCancellationException(h0);
2240 +        checkCompletedWithWrappedCancellationException(h1);
2241 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2242 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2243 +        checkCompletedWithWrappedCancellationException(h2);
2244 +        checkCompletedWithWrappedCancellationException(h3);
2245 +        g.complete(v1);
2246 +
2247 +        // unspecified behavior - both source completions available
2248 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2249 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2250 +        try {
2251 +            assertEquals(inc(v1), h4.join());
2252 +            rs[4].assertValue(inc(v1));
2253 +        } catch (CompletionException ok) {
2254 +            checkCompletedWithWrappedCancellationException(h4);
2255 +            rs[4].assertNotInvoked();
2256 +        }
2257 +        try {
2258 +            assertEquals(inc(v1), h5.join());
2259 +            rs[5].assertValue(inc(v1));
2260 +        } catch (CompletionException ok) {
2261 +            checkCompletedWithWrappedCancellationException(h5);
2262 +            rs[5].assertNotInvoked();
2263 +        }
2264 +
2265 +        checkCancelled(f);
2266 +        checkCompletedNormally(g, v1);
2267 +        checkCompletedWithWrappedCancellationException(h0);
2268 +        checkCompletedWithWrappedCancellationException(h1);
2269 +        checkCompletedWithWrappedCancellationException(h2);
2270 +        checkCompletedWithWrappedCancellationException(h3);
2271 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2272 +    }}
2273 +
2274 +    public void testApplyToEither_sourceCancelled2() {
2275 +        for (ExecutionMode m : ExecutionMode.values())
2276 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2277 +        for (boolean fFirst : new boolean[] { true, false })
2278 +        for (Integer v1 : new Integer[] { 1, null })
2279 +    {
2280 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2281 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2282 +        final IncFunction[] rs = new IncFunction[6];
2283 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2284 +
2285 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2286 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2287 +        assertTrue(fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2288 +        assertTrue(!fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2289 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2290 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2291 +
2292 +        // unspecified behavior - both source completions available
2293 +        try {
2294 +            assertEquals(inc(v1), h0.join());
2295 +            rs[0].assertValue(inc(v1));
2296 +        } catch (CompletionException ok) {
2297 +            checkCompletedWithWrappedCancellationException(h0);
2298 +            rs[0].assertNotInvoked();
2299 +        }
2300 +        try {
2301 +            assertEquals(inc(v1), h1.join());
2302 +            rs[1].assertValue(inc(v1));
2303 +        } catch (CompletionException ok) {
2304 +            checkCompletedWithWrappedCancellationException(h1);
2305 +            rs[1].assertNotInvoked();
2306 +        }
2307 +        try {
2308 +            assertEquals(inc(v1), h2.join());
2309 +            rs[2].assertValue(inc(v1));
2310 +        } catch (CompletionException ok) {
2311 +            checkCompletedWithWrappedCancellationException(h2);
2312 +            rs[2].assertNotInvoked();
2313 +        }
2314 +        try {
2315 +            assertEquals(inc(v1), h3.join());
2316 +            rs[3].assertValue(inc(v1));
2317 +        } catch (CompletionException ok) {
2318 +            checkCompletedWithWrappedCancellationException(h3);
2319 +            rs[3].assertNotInvoked();
2320 +        }
2321 +
2322 +        checkCompletedNormally(f, v1);
2323 +        checkCancelled(g);
2324 +    }}
2325 +
2326 +    /**
2327 +     * applyToEither result completes exceptionally if action does
2328 +     */
2329 +    public void testApplyToEither_actionFailed() {
2330 +        for (ExecutionMode m : ExecutionMode.values())
2331 +        for (Integer v1 : new Integer[] { 1, null })
2332 +        for (Integer v2 : new Integer[] { 2, null })
2333 +    {
2334 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2335 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2336 +        final FailingFunction[] rs = new FailingFunction[6];
2337 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
2338 +
2339 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2340 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2341 +        f.complete(v1);
2342 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2343 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2344 +        checkCompletedWithWrappedCFException(h0);
2345 +        checkCompletedWithWrappedCFException(h1);
2346 +        checkCompletedWithWrappedCFException(h2);
2347 +        checkCompletedWithWrappedCFException(h3);
2348 +        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2349 +
2350 +        g.complete(v2);
2351 +
2352 +        // unspecified behavior - both source completions available
2353 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2354 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2355 +
2356 +        checkCompletedWithWrappedCFException(h4);
2357 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2358 +                   Objects.equals(v2, rs[4].value));
2359 +        checkCompletedWithWrappedCFException(h5);
2360 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2361 +                   Objects.equals(v2, rs[5].value));
2362 +
2363 +        checkCompletedNormally(f, v1);
2364 +        checkCompletedNormally(g, v2);
2365 +    }}
2366 +
2367 +    /**
2368 +     * acceptEither result completes normally after normal completion
2369 +     * of either source
2370 +     */
2371 +    public void testAcceptEither_normalCompletion() {
2372 +        for (ExecutionMode m : ExecutionMode.values())
2373 +        for (Integer v1 : new Integer[] { 1, null })
2374 +        for (Integer v2 : new Integer[] { 2, null })
2375 +    {
2376 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2377 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2378 +        final NoopConsumer[] rs = new NoopConsumer[6];
2379 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2380 +
2381 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2382 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2383 +        checkIncomplete(h0);
2384 +        checkIncomplete(h1);
2385 +        rs[0].assertNotInvoked();
2386 +        rs[1].assertNotInvoked();
2387 +        f.complete(v1);
2388 +        checkCompletedNormally(h0, null);
2389 +        checkCompletedNormally(h1, null);
2390 +        rs[0].assertValue(v1);
2391 +        rs[1].assertValue(v1);
2392 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2393 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2394 +        checkCompletedNormally(h2, null);
2395 +        checkCompletedNormally(h3, null);
2396 +        rs[2].assertValue(v1);
2397 +        rs[3].assertValue(v1);
2398 +        g.complete(v2);
2399 +
2400 +        // unspecified behavior - both source completions available
2401 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2402 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2403 +        checkCompletedNormally(h4, null);
2404 +        checkCompletedNormally(h5, null);
2405 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2406 +                   Objects.equals(v2, rs[4].value));
2407 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2408 +                   Objects.equals(v2, rs[5].value));
2409 +
2410 +        checkCompletedNormally(f, v1);
2411 +        checkCompletedNormally(g, v2);
2412 +        checkCompletedNormally(h0, null);
2413 +        checkCompletedNormally(h1, null);
2414 +        checkCompletedNormally(h2, null);
2415 +        checkCompletedNormally(h3, null);
2416 +        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2417 +    }}
2418 +
2419 +    /**
2420 +     * acceptEither result completes exceptionally after exceptional
2421 +     * completion of either source
2422 +     */
2423 +    public void testAcceptEither_exceptionalCompletion() {
2424 +        for (ExecutionMode m : ExecutionMode.values())
2425 +        for (Integer v1 : new Integer[] { 1, null })
2426 +    {
2427 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2428 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2429 +        final CFException ex = new CFException();
2430 +        final NoopConsumer[] rs = new NoopConsumer[6];
2431 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2432 +
2433 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2434 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2435 +        checkIncomplete(h0);
2436 +        checkIncomplete(h1);
2437 +        rs[0].assertNotInvoked();
2438 +        rs[1].assertNotInvoked();
2439 +        f.completeExceptionally(ex);
2440 +        checkCompletedWithWrappedException(h0, ex);
2441 +        checkCompletedWithWrappedException(h1, ex);
2442 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2443 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2444 +        checkCompletedWithWrappedException(h2, ex);
2445 +        checkCompletedWithWrappedException(h3, ex);
2446 +
2447 +        g.complete(v1);
2448 +
2449 +        // unspecified behavior - both source completions available
2450 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2451 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2452 +        try {
2453 +            assertNull(h4.join());
2454 +            rs[4].assertValue(v1);
2455 +        } catch (CompletionException ok) {
2456 +            checkCompletedWithWrappedException(h4, ex);
2457 +            rs[4].assertNotInvoked();
2458 +        }
2459 +        try {
2460 +            assertNull(h5.join());
2461 +            rs[5].assertValue(v1);
2462 +        } catch (CompletionException ok) {
2463 +            checkCompletedWithWrappedException(h5, ex);
2464 +            rs[5].assertNotInvoked();
2465 +        }
2466 +
2467 +        checkCompletedExceptionally(f, ex);
2468 +        checkCompletedNormally(g, v1);
2469 +        checkCompletedWithWrappedException(h0, ex);
2470 +        checkCompletedWithWrappedException(h1, ex);
2471 +        checkCompletedWithWrappedException(h2, ex);
2472 +        checkCompletedWithWrappedException(h3, ex);
2473 +        checkCompletedWithWrappedException(h4, ex);
2474 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2475 +    }}
2476 +
2477 +    public void testAcceptEither_exceptionalCompletion2() {
2478 +        for (ExecutionMode m : ExecutionMode.values())
2479 +        for (boolean fFirst : new boolean[] { true, false })
2480 +        for (Integer v1 : new Integer[] { 1, null })
2481 +    {
2482 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2483 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2484 +        final CFException ex = new CFException();
2485 +        final NoopConsumer[] rs = new NoopConsumer[6];
2486 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2487 +
2488 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2489 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2490 +        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2491 +        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2492 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2493 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2494 +
2495 +        // unspecified behavior - both source completions available
2496 +        try {
2497 +            assertEquals(null, h0.join());
2498 +            rs[0].assertValue(v1);
2499 +        } catch (CompletionException ok) {
2500 +            checkCompletedWithWrappedException(h0, ex);
2501 +            rs[0].assertNotInvoked();
2502 +        }
2503 +        try {
2504 +            assertEquals(null, h1.join());
2505 +            rs[1].assertValue(v1);
2506 +        } catch (CompletionException ok) {
2507 +            checkCompletedWithWrappedException(h1, ex);
2508 +            rs[1].assertNotInvoked();
2509 +        }
2510 +        try {
2511 +            assertEquals(null, h2.join());
2512 +            rs[2].assertValue(v1);
2513 +        } catch (CompletionException ok) {
2514 +            checkCompletedWithWrappedException(h2, ex);
2515 +            rs[2].assertNotInvoked();
2516 +        }
2517 +        try {
2518 +            assertEquals(null, h3.join());
2519 +            rs[3].assertValue(v1);
2520 +        } catch (CompletionException ok) {
2521 +            checkCompletedWithWrappedException(h3, ex);
2522 +            rs[3].assertNotInvoked();
2523 +        }
2524 +
2525 +        checkCompletedNormally(f, v1);
2526 +        checkCompletedExceptionally(g, ex);
2527 +    }}
2528 +
2529 +    /**
2530 +     * acceptEither result completes exceptionally if either source cancelled
2531 +     */
2532 +    public void testAcceptEither_sourceCancelled() {
2533 +        for (ExecutionMode m : ExecutionMode.values())
2534 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2535 +        for (Integer v1 : new Integer[] { 1, null })
2536 +    {
2537 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2538 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2539 +        final NoopConsumer[] rs = new NoopConsumer[6];
2540 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2541 +
2542 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2543 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2544 +        checkIncomplete(h0);
2545 +        checkIncomplete(h1);
2546 +        rs[0].assertNotInvoked();
2547 +        rs[1].assertNotInvoked();
2548 +        f.cancel(mayInterruptIfRunning);
2549 +        checkCompletedWithWrappedCancellationException(h0);
2550 +        checkCompletedWithWrappedCancellationException(h1);
2551 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2552 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2553 +        checkCompletedWithWrappedCancellationException(h2);
2554 +        checkCompletedWithWrappedCancellationException(h3);
2555 +
2556 +        g.complete(v1);
2557 +
2558 +        // unspecified behavior - both source completions available
2559 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2560 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2561 +        try {
2562 +            assertNull(h4.join());
2563 +            rs[4].assertValue(v1);
2564 +        } catch (CompletionException ok) {
2565 +            checkCompletedWithWrappedCancellationException(h4);
2566 +            rs[4].assertNotInvoked();
2567 +        }
2568 +        try {
2569 +            assertNull(h5.join());
2570 +            rs[5].assertValue(v1);
2571 +        } catch (CompletionException ok) {
2572 +            checkCompletedWithWrappedCancellationException(h5);
2573 +            rs[5].assertNotInvoked();
2574 +        }
2575 +
2576 +        checkCancelled(f);
2577 +        checkCompletedNormally(g, v1);
2578 +        checkCompletedWithWrappedCancellationException(h0);
2579 +        checkCompletedWithWrappedCancellationException(h1);
2580 +        checkCompletedWithWrappedCancellationException(h2);
2581 +        checkCompletedWithWrappedCancellationException(h3);
2582 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2583 +    }}
2584 +
2585 +    /**
2586 +     * acceptEither result completes exceptionally if action does
2587 +     */
2588 +    public void testAcceptEither_actionFailed() {
2589 +        for (ExecutionMode m : ExecutionMode.values())
2590 +        for (Integer v1 : new Integer[] { 1, null })
2591 +        for (Integer v2 : new Integer[] { 2, null })
2592 +    {
2593 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2594 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2595 +        final FailingConsumer[] rs = new FailingConsumer[6];
2596 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
2597 +
2598 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2599 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2600 +        f.complete(v1);
2601 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2602 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2603 +        checkCompletedWithWrappedCFException(h0);
2604 +        checkCompletedWithWrappedCFException(h1);
2605 +        checkCompletedWithWrappedCFException(h2);
2606 +        checkCompletedWithWrappedCFException(h3);
2607 +        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2608 +
2609 +        g.complete(v2);
2610 +
2611 +        // unspecified behavior - both source completions available
2612 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2613 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2614 +
2615 +        checkCompletedWithWrappedCFException(h4);
2616 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2617 +                   Objects.equals(v2, rs[4].value));
2618 +        checkCompletedWithWrappedCFException(h5);
2619 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2620 +                   Objects.equals(v2, rs[5].value));
2621 +
2622 +        checkCompletedNormally(f, v1);
2623 +        checkCompletedNormally(g, v2);
2624 +    }}
2625 +
2626 +    /**
2627 +     * runAfterEither result completes normally after normal completion
2628 +     * of either source
2629 +     */
2630 +    public void testRunAfterEither_normalCompletion() {
2631 +        for (ExecutionMode m : ExecutionMode.values())
2632 +        for (Integer v1 : new Integer[] { 1, null })
2633 +        for (Integer v2 : new Integer[] { 2, null })
2634 +    {
2635 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2636 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2637 +        final Noop[] rs = new Noop[6];
2638 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2639 +
2640 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2641 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2642 +        checkIncomplete(h0);
2643 +        checkIncomplete(h1);
2644 +        rs[0].assertNotInvoked();
2645 +        rs[1].assertNotInvoked();
2646 +        f.complete(v1);
2647 +        checkCompletedNormally(h0, null);
2648 +        checkCompletedNormally(h1, null);
2649 +        rs[0].assertInvoked();
2650 +        rs[1].assertInvoked();
2651 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2652 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2653 +        checkCompletedNormally(h2, null);
2654 +        checkCompletedNormally(h3, null);
2655 +        rs[2].assertInvoked();
2656 +        rs[3].assertInvoked();
2657 +
2658 +        g.complete(v2);
2659 +
2660 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2661 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2662 +
2663 +        checkCompletedNormally(f, v1);
2664 +        checkCompletedNormally(g, v2);
2665 +        checkCompletedNormally(h0, null);
2666 +        checkCompletedNormally(h1, null);
2667 +        checkCompletedNormally(h2, null);
2668 +        checkCompletedNormally(h3, null);
2669 +        checkCompletedNormally(h4, null);
2670 +        checkCompletedNormally(h5, null);
2671 +        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2672 +    }}
2673 +
2674 +    /**
2675 +     * runAfterEither result completes exceptionally after exceptional
2676 +     * completion of either source
2677 +     */
2678 +    public void testRunAfterEither_exceptionalCompletion() {
2679 +        for (ExecutionMode m : ExecutionMode.values())
2680 +        for (Integer v1 : new Integer[] { 1, null })
2681 +    {
2682 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2683 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2684 +        final CFException ex = new CFException();
2685 +        final Noop[] rs = new Noop[6];
2686 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2687 +
2688 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2689 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2690 +        checkIncomplete(h0);
2691 +        checkIncomplete(h1);
2692 +        rs[0].assertNotInvoked();
2693 +        rs[1].assertNotInvoked();
2694 +        assertTrue(f.completeExceptionally(ex));
2695 +        checkCompletedWithWrappedException(h0, ex);
2696 +        checkCompletedWithWrappedException(h1, ex);
2697 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2698 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2699 +        checkCompletedWithWrappedException(h2, ex);
2700 +        checkCompletedWithWrappedException(h3, ex);
2701 +
2702 +        assertTrue(g.complete(v1));
2703 +
2704 +        // unspecified behavior - both source completions available
2705 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2706 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2707 +        try {
2708 +            assertNull(h4.join());
2709 +            rs[4].assertInvoked();
2710 +        } catch (CompletionException ok) {
2711 +            checkCompletedWithWrappedException(h4, ex);
2712 +            rs[4].assertNotInvoked();
2713 +        }
2714 +        try {
2715 +            assertNull(h5.join());
2716 +            rs[5].assertInvoked();
2717 +        } catch (CompletionException ok) {
2718 +            checkCompletedWithWrappedException(h5, ex);
2719 +            rs[5].assertNotInvoked();
2720 +        }
2721 +
2722 +        checkCompletedExceptionally(f, ex);
2723 +        checkCompletedNormally(g, v1);
2724 +        checkCompletedWithWrappedException(h0, ex);
2725 +        checkCompletedWithWrappedException(h1, ex);
2726 +        checkCompletedWithWrappedException(h2, ex);
2727 +        checkCompletedWithWrappedException(h3, ex);
2728 +        checkCompletedWithWrappedException(h4, ex);
2729 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2730 +    }}
2731 +
2732 +    public void testRunAfterEither_exceptionalCompletion2() {
2733 +        for (ExecutionMode m : ExecutionMode.values())
2734 +        for (boolean fFirst : new boolean[] { true, false })
2735 +        for (Integer v1 : new Integer[] { 1, null })
2736 +    {
2737 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2738 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2739 +        final CFException ex = new CFException();
2740 +        final Noop[] rs = new Noop[6];
2741 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2742 +
2743 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2744 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2745 +        assertTrue( fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2746 +        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2747 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2748 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2749 +
2750 +        // unspecified behavior - both source completions available
2751 +        try {
2752 +            assertEquals(null, h0.join());
2753 +            rs[0].assertInvoked();
2754 +        } catch (CompletionException ok) {
2755 +            checkCompletedWithWrappedException(h0, ex);
2756 +            rs[0].assertNotInvoked();
2757 +        }
2758 +        try {
2759 +            assertEquals(null, h1.join());
2760 +            rs[1].assertInvoked();
2761 +        } catch (CompletionException ok) {
2762 +            checkCompletedWithWrappedException(h1, ex);
2763 +            rs[1].assertNotInvoked();
2764 +        }
2765 +        try {
2766 +            assertEquals(null, h2.join());
2767 +            rs[2].assertInvoked();
2768 +        } catch (CompletionException ok) {
2769 +            checkCompletedWithWrappedException(h2, ex);
2770 +            rs[2].assertNotInvoked();
2771 +        }
2772 +        try {
2773 +            assertEquals(null, h3.join());
2774 +            rs[3].assertInvoked();
2775 +        } catch (CompletionException ok) {
2776 +            checkCompletedWithWrappedException(h3, ex);
2777 +            rs[3].assertNotInvoked();
2778 +        }
2779 +
2780 +        checkCompletedNormally(f, v1);
2781 +        checkCompletedExceptionally(g, ex);
2782 +    }}
2783 +
2784 +    /**
2785 +     * runAfterEither result completes exceptionally if either source cancelled
2786 +     */
2787 +    public void testRunAfterEither_sourceCancelled() {
2788 +        for (ExecutionMode m : ExecutionMode.values())
2789 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2790 +        for (Integer v1 : new Integer[] { 1, null })
2791 +    {
2792 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2793 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2794 +        final Noop[] rs = new Noop[6];
2795 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2796 +
2797 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2798 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2799 +        checkIncomplete(h0);
2800 +        checkIncomplete(h1);
2801 +        rs[0].assertNotInvoked();
2802 +        rs[1].assertNotInvoked();
2803 +        f.cancel(mayInterruptIfRunning);
2804 +        checkCompletedWithWrappedCancellationException(h0);
2805 +        checkCompletedWithWrappedCancellationException(h1);
2806 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2807 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2808 +        checkCompletedWithWrappedCancellationException(h2);
2809 +        checkCompletedWithWrappedCancellationException(h3);
2810 +
2811 +        assertTrue(g.complete(v1));
2812 +
2813 +        // unspecified behavior - both source completions available
2814 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2815 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2816 +        try {
2817 +            assertNull(h4.join());
2818 +            rs[4].assertInvoked();
2819 +        } catch (CompletionException ok) {
2820 +            checkCompletedWithWrappedCancellationException(h4);
2821 +            rs[4].assertNotInvoked();
2822 +        }
2823 +        try {
2824 +            assertNull(h5.join());
2825 +            rs[5].assertInvoked();
2826 +        } catch (CompletionException ok) {
2827 +            checkCompletedWithWrappedCancellationException(h5);
2828 +            rs[5].assertNotInvoked();
2829 +        }
2830 +
2831 +        checkCancelled(f);
2832 +        checkCompletedNormally(g, v1);
2833 +        checkCompletedWithWrappedCancellationException(h0);
2834 +        checkCompletedWithWrappedCancellationException(h1);
2835 +        checkCompletedWithWrappedCancellationException(h2);
2836 +        checkCompletedWithWrappedCancellationException(h3);
2837 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2838 +    }}
2839 +
2840 +    /**
2841 +     * runAfterEither result completes exceptionally if action does
2842 +     */
2843 +    public void testRunAfterEither_actionFailed() {
2844 +        for (ExecutionMode m : ExecutionMode.values())
2845 +        for (Integer v1 : new Integer[] { 1, null })
2846 +        for (Integer v2 : new Integer[] { 2, null })
2847 +    {
2848 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2849 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2850 +        final FailingRunnable[] rs = new FailingRunnable[6];
2851 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
2852 +
2853 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2854 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2855 +        assertTrue(f.complete(v1));
2856 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2857 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2858 +        checkCompletedWithWrappedCFException(h0);
2859 +        checkCompletedWithWrappedCFException(h1);
2860 +        checkCompletedWithWrappedCFException(h2);
2861 +        checkCompletedWithWrappedCFException(h3);
2862 +        for (int i = 0; i < 4; i++) rs[i].assertInvoked();
2863 +        assertTrue(g.complete(v2));
2864 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2865 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2866 +        checkCompletedWithWrappedCFException(h4);
2867 +        checkCompletedWithWrappedCFException(h5);
2868 +
2869 +        checkCompletedNormally(f, v1);
2870 +        checkCompletedNormally(g, v2);
2871 +        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2872 +    }}
2873 +
2874 +    /**
2875 +     * thenCompose result completes normally after normal completion of source
2876 +     */
2877 +    public void testThenCompose_normalCompletion() {
2878 +        for (ExecutionMode m : ExecutionMode.values())
2879 +        for (boolean createIncomplete : new boolean[] { true, false })
2880 +        for (Integer v1 : new Integer[] { 1, null })
2881 +    {
2882 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2883 +        final CompletableFutureInc r = new CompletableFutureInc(m);
2884 +        if (!createIncomplete) assertTrue(f.complete(v1));
2885 +        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2886 +        if (createIncomplete) assertTrue(f.complete(v1));
2887 +
2888 +        checkCompletedNormally(g, inc(v1));
2889 +        checkCompletedNormally(f, v1);
2890 +        r.assertValue(v1);
2891 +    }}
2892 +
2893 +    /**
2894 +     * thenCompose result completes exceptionally after exceptional
2895 +     * completion of source
2896 +     */
2897 +    public void testThenCompose_exceptionalCompletion() {
2898 +        for (ExecutionMode m : ExecutionMode.values())
2899 +        for (boolean createIncomplete : new boolean[] { true, false })
2900 +    {
2901 +        final CFException ex = new CFException();
2902 +        final CompletableFutureInc r = new CompletableFutureInc(m);
2903 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2904 +        if (!createIncomplete) f.completeExceptionally(ex);
2905 +        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2906 +        if (createIncomplete) f.completeExceptionally(ex);
2907 +
2908 +        checkCompletedWithWrappedException(g, ex);
2909 +        checkCompletedExceptionally(f, ex);
2910 +        r.assertNotInvoked();
2911 +    }}
2912 +
2913 +    /**
2914 +     * thenCompose result completes exceptionally if action does
2915 +     */
2916 +    public void testThenCompose_actionFailed() {
2917 +        for (ExecutionMode m : ExecutionMode.values())
2918 +        for (boolean createIncomplete : new boolean[] { true, false })
2919 +        for (Integer v1 : new Integer[] { 1, null })
2920 +    {
2921 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2922 +        final FailingCompletableFutureFunction r
2923 +            = new FailingCompletableFutureFunction(m);
2924 +        if (!createIncomplete) assertTrue(f.complete(v1));
2925 +        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2926 +        if (createIncomplete) assertTrue(f.complete(v1));
2927 +
2928 +        checkCompletedWithWrappedCFException(g);
2929 +        checkCompletedNormally(f, v1);
2930 +    }}
2931 +
2932 +    /**
2933 +     * thenCompose result completes exceptionally if source cancelled
2934 +     */
2935 +    public void testThenCompose_sourceCancelled() {
2936 +        for (ExecutionMode m : ExecutionMode.values())
2937 +        for (boolean createIncomplete : new boolean[] { true, false })
2938 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2939 +    {
2940 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2941 +        final CompletableFutureInc r = new CompletableFutureInc(m);
2942 +        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
2943 +        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2944 +        if (createIncomplete) {
2945 +            checkIncomplete(g);
2946 +            assertTrue(f.cancel(mayInterruptIfRunning));
2947 +        }
2948 +
2949 +        checkCompletedWithWrappedCancellationException(g);
2950 +        checkCancelled(f);
2951 +    }}
2952 +
2953 +    /**
2954 +     * thenCompose result completes exceptionally if the result of the action does
2955 +     */
2956 +    public void testThenCompose_actionReturnsFailingFuture() {
2957 +        for (ExecutionMode m : ExecutionMode.values())
2958 +        for (int order = 0; order < 6; order++)
2959 +        for (Integer v1 : new Integer[] { 1, null })
2960 +    {
2961 +        final CFException ex = new CFException();
2962 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2963 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2964 +        final CompletableFuture<Integer> h;
2965 +        // Test all permutations of orders
2966 +        switch (order) {
2967 +        case 0:
2968 +            assertTrue(f.complete(v1));
2969 +            assertTrue(g.completeExceptionally(ex));
2970 +            h = m.thenCompose(f, (x -> g));
2971 +            break;
2972 +        case 1:
2973 +            assertTrue(f.complete(v1));
2974 +            h = m.thenCompose(f, (x -> g));
2975 +            assertTrue(g.completeExceptionally(ex));
2976 +            break;
2977 +        case 2:
2978 +            assertTrue(g.completeExceptionally(ex));
2979 +            assertTrue(f.complete(v1));
2980 +            h = m.thenCompose(f, (x -> g));
2981 +            break;
2982 +        case 3:
2983 +            assertTrue(g.completeExceptionally(ex));
2984 +            h = m.thenCompose(f, (x -> g));
2985 +            assertTrue(f.complete(v1));
2986 +            break;
2987 +        case 4:
2988 +            h = m.thenCompose(f, (x -> g));
2989 +            assertTrue(f.complete(v1));
2990 +            assertTrue(g.completeExceptionally(ex));
2991 +            break;
2992 +        case 5:
2993 +            h = m.thenCompose(f, (x -> g));
2994 +            assertTrue(f.complete(v1));
2995 +            assertTrue(g.completeExceptionally(ex));
2996 +            break;
2997 +        default: throw new AssertionError();
2998 +        }
2999 +
3000 +        checkCompletedExceptionally(g, ex);
3001 +        checkCompletedWithWrappedException(h, ex);
3002 +        checkCompletedNormally(f, v1);
3003 +    }}
3004 +
3005 +    // other static methods
3006 +
3007 +    /**
3008 +     * allOf(no component futures) returns a future completed normally
3009 +     * with the value null
3010 +     */
3011 +    public void testAllOf_empty() throws Exception {
3012 +        CompletableFuture<Void> f = CompletableFuture.allOf();
3013 +        checkCompletedNormally(f, null);
3014 +    }
3015 +
3016 +    /**
3017 +     * allOf returns a future completed normally with the value null
3018 +     * when all components complete normally
3019 +     */
3020 +    public void testAllOf_normal() throws Exception {
3021 +        for (int k = 1; k < 10; k++) {
3022 +            CompletableFuture<Integer>[] fs
3023 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3024 +            for (int i = 0; i < k; i++)
3025 +                fs[i] = new CompletableFuture<>();
3026 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3027 +            for (int i = 0; i < k; i++) {
3028 +                checkIncomplete(f);
3029 +                checkIncomplete(CompletableFuture.allOf(fs));
3030 +                fs[i].complete(one);
3031 +            }
3032 +            checkCompletedNormally(f, null);
3033 +            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3034 +        }
3035 +    }
3036 +
3037 +    public void testAllOf_backwards() throws Exception {
3038 +        for (int k = 1; k < 10; k++) {
3039 +            CompletableFuture<Integer>[] fs
3040 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3041 +            for (int i = 0; i < k; i++)
3042 +                fs[i] = new CompletableFuture<>();
3043 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3044 +            for (int i = k - 1; i >= 0; i--) {
3045 +                checkIncomplete(f);
3046 +                checkIncomplete(CompletableFuture.allOf(fs));
3047 +                fs[i].complete(one);
3048 +            }
3049 +            checkCompletedNormally(f, null);
3050 +            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3051 +        }
3052 +    }
3053 +
3054 +    public void testAllOf_exceptional() throws Exception {
3055 +        for (int k = 1; k < 10; k++) {
3056 +            CompletableFuture<Integer>[] fs
3057 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3058 +            CFException ex = new CFException();
3059 +            for (int i = 0; i < k; i++)
3060 +                fs[i] = new CompletableFuture<>();
3061 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3062 +            for (int i = 0; i < k; i++) {
3063 +                checkIncomplete(f);
3064 +                checkIncomplete(CompletableFuture.allOf(fs));
3065 +                if (i != k / 2) {
3066 +                    fs[i].complete(i);
3067 +                    checkCompletedNormally(fs[i], i);
3068 +                } else {
3069 +                    fs[i].completeExceptionally(ex);
3070 +                    checkCompletedExceptionally(fs[i], ex);
3071 +                }
3072 +            }
3073 +            checkCompletedWithWrappedException(f, ex);
3074 +            checkCompletedWithWrappedException(CompletableFuture.allOf(fs), ex);
3075 +        }
3076 +    }
3077 +
3078 +    /**
3079 +     * anyOf(no component futures) returns an incomplete future
3080 +     */
3081 +    public void testAnyOf_empty() throws Exception {
3082 +        for (Integer v1 : new Integer[] { 1, null })
3083 +    {
3084 +        CompletableFuture<Object> f = CompletableFuture.anyOf();
3085 +        checkIncomplete(f);
3086 +
3087 +        f.complete(v1);
3088 +        checkCompletedNormally(f, v1);
3089 +    }}
3090 +
3091 +    /**
3092 +     * anyOf returns a future completed normally with a value when
3093 +     * a component future does
3094 +     */
3095 +    public void testAnyOf_normal() throws Exception {
3096 +        for (int k = 0; k < 10; k++) {
3097 +            CompletableFuture[] fs = new CompletableFuture[k];
3098 +            for (int i = 0; i < k; i++)
3099 +                fs[i] = new CompletableFuture<>();
3100 +            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3101 +            checkIncomplete(f);
3102 +            for (int i = 0; i < k; i++) {
3103 +                fs[i].complete(i);
3104 +                checkCompletedNormally(f, 0);
3105 +                int x = (int) CompletableFuture.anyOf(fs).join();
3106 +                assertTrue(0 <= x && x <= i);
3107 +            }
3108 +        }
3109 +    }
3110 +    public void testAnyOf_normal_backwards() throws Exception {
3111 +        for (int k = 0; k < 10; k++) {
3112 +            CompletableFuture[] fs = new CompletableFuture[k];
3113 +            for (int i = 0; i < k; i++)
3114 +                fs[i] = new CompletableFuture<>();
3115 +            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3116 +            checkIncomplete(f);
3117 +            for (int i = k - 1; i >= 0; i--) {
3118 +                fs[i].complete(i);
3119 +                checkCompletedNormally(f, k - 1);
3120 +                int x = (int) CompletableFuture.anyOf(fs).join();
3121 +                assertTrue(i <= x && x <= k - 1);
3122 +            }
3123 +        }
3124 +    }
3125 +
3126 +    /**
3127 +     * anyOf result completes exceptionally when any component does.
3128 +     */
3129 +    public void testAnyOf_exceptional() throws Exception {
3130 +        for (int k = 0; k < 10; k++) {
3131 +            CompletableFuture[] fs = new CompletableFuture[k];
3132 +            CFException[] exs = new CFException[k];
3133 +            for (int i = 0; i < k; i++) {
3134 +                fs[i] = new CompletableFuture<>();
3135 +                exs[i] = new CFException();
3136 +            }
3137 +            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3138 +            checkIncomplete(f);
3139 +            for (int i = 0; i < k; i++) {
3140 +                fs[i].completeExceptionally(exs[i]);
3141 +                checkCompletedWithWrappedException(f, exs[0]);
3142 +                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3143 +            }
3144 +        }
3145 +    }
3146 +
3147 +    public void testAnyOf_exceptional_backwards() throws Exception {
3148 +        for (int k = 0; k < 10; k++) {
3149 +            CompletableFuture[] fs = new CompletableFuture[k];
3150 +            CFException[] exs = new CFException[k];
3151 +            for (int i = 0; i < k; i++) {
3152 +                fs[i] = new CompletableFuture<>();
3153 +                exs[i] = new CFException();
3154 +            }
3155 +            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3156 +            checkIncomplete(f);
3157 +            for (int i = k - 1; i >= 0; i--) {
3158 +                fs[i].completeExceptionally(exs[i]);
3159 +                checkCompletedWithWrappedException(f, exs[k - 1]);
3160 +                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3161 +            }
3162 +        }
3163 +    }
3164 +
3165 +    /**
3166 +     * Completion methods throw NullPointerException with null arguments
3167 +     */
3168 +    public void testNPE() {
3169 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3170 +        CompletableFuture<Integer> g = new CompletableFuture<>();
3171 +        CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
3172 +        ThreadExecutor exec = new ThreadExecutor();
3173 +
3174 +        Runnable[] throwingActions = {
3175 +            () -> CompletableFuture.supplyAsync(null),
3176 +            () -> CompletableFuture.supplyAsync(null, exec),
3177 +            () -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.SYNC, 42), null),
3178 +
3179 +            () -> CompletableFuture.runAsync(null),
3180 +            () -> CompletableFuture.runAsync(null, exec),
3181 +            () -> CompletableFuture.runAsync(() -> {}, null),
3182 +
3183 +            () -> f.completeExceptionally(null),
3184 +
3185 +            () -> f.thenApply(null),
3186 +            () -> f.thenApplyAsync(null),
3187 +            () -> f.thenApplyAsync((x) -> x, null),
3188 +            () -> f.thenApplyAsync(null, exec),
3189 +
3190 +            () -> f.thenAccept(null),
3191 +            () -> f.thenAcceptAsync(null),
3192 +            () -> f.thenAcceptAsync((x) -> {} , null),
3193 +            () -> f.thenAcceptAsync(null, exec),
3194 +
3195 +            () -> f.thenRun(null),
3196 +            () -> f.thenRunAsync(null),
3197 +            () -> f.thenRunAsync(() -> {} , null),
3198 +            () -> f.thenRunAsync(null, exec),
3199 +
3200 +            () -> f.thenCombine(g, null),
3201 +            () -> f.thenCombineAsync(g, null),
3202 +            () -> f.thenCombineAsync(g, null, exec),
3203 +            () -> f.thenCombine(nullFuture, (x, y) -> x),
3204 +            () -> f.thenCombineAsync(nullFuture, (x, y) -> x),
3205 +            () -> f.thenCombineAsync(nullFuture, (x, y) -> x, exec),
3206 +            () -> f.thenCombineAsync(g, (x, y) -> x, null),
3207 +
3208 +            () -> f.thenAcceptBoth(g, null),
3209 +            () -> f.thenAcceptBothAsync(g, null),
3210 +            () -> f.thenAcceptBothAsync(g, null, exec),
3211 +            () -> f.thenAcceptBoth(nullFuture, (x, y) -> {}),
3212 +            () -> f.thenAcceptBothAsync(nullFuture, (x, y) -> {}),
3213 +            () -> f.thenAcceptBothAsync(nullFuture, (x, y) -> {}, exec),
3214 +            () -> f.thenAcceptBothAsync(g, (x, y) -> {}, null),
3215 +
3216 +            () -> f.runAfterBoth(g, null),
3217 +            () -> f.runAfterBothAsync(g, null),
3218 +            () -> f.runAfterBothAsync(g, null, exec),
3219 +            () -> f.runAfterBoth(nullFuture, () -> {}),
3220 +            () -> f.runAfterBothAsync(nullFuture, () -> {}),
3221 +            () -> f.runAfterBothAsync(nullFuture, () -> {}, exec),
3222 +            () -> f.runAfterBothAsync(g, () -> {}, null),
3223 +
3224 +            () -> f.applyToEither(g, null),
3225 +            () -> f.applyToEitherAsync(g, null),
3226 +            () -> f.applyToEitherAsync(g, null, exec),
3227 +            () -> f.applyToEither(nullFuture, (x) -> x),
3228 +            () -> f.applyToEitherAsync(nullFuture, (x) -> x),
3229 +            () -> f.applyToEitherAsync(nullFuture, (x) -> x, exec),
3230 +            () -> f.applyToEitherAsync(g, (x) -> x, null),
3231 +
3232 +            () -> f.acceptEither(g, null),
3233 +            () -> f.acceptEitherAsync(g, null),
3234 +            () -> f.acceptEitherAsync(g, null, exec),
3235 +            () -> f.acceptEither(nullFuture, (x) -> {}),
3236 +            () -> f.acceptEitherAsync(nullFuture, (x) -> {}),
3237 +            () -> f.acceptEitherAsync(nullFuture, (x) -> {}, exec),
3238 +            () -> f.acceptEitherAsync(g, (x) -> {}, null),
3239 +
3240 +            () -> f.runAfterEither(g, null),
3241 +            () -> f.runAfterEitherAsync(g, null),
3242 +            () -> f.runAfterEitherAsync(g, null, exec),
3243 +            () -> f.runAfterEither(nullFuture, () -> {}),
3244 +            () -> f.runAfterEitherAsync(nullFuture, () -> {}),
3245 +            () -> f.runAfterEitherAsync(nullFuture, () -> {}, exec),
3246 +            () -> f.runAfterEitherAsync(g, () -> {}, null),
3247 +
3248 +            () -> f.thenCompose(null),
3249 +            () -> f.thenComposeAsync(null),
3250 +            () -> f.thenComposeAsync(new CompletableFutureInc(ExecutionMode.EXECUTOR), null),
3251 +            () -> f.thenComposeAsync(null, exec),
3252 +
3253 +            () -> f.exceptionally(null),
3254 +
3255 +            () -> f.handle(null),
3256 +
3257 +            () -> CompletableFuture.allOf((CompletableFuture<?>)null),
3258 +            () -> CompletableFuture.allOf((CompletableFuture<?>[])null),
3259 +            () -> CompletableFuture.allOf(f, null),
3260 +            () -> CompletableFuture.allOf(null, f),
3261 +
3262 +            () -> CompletableFuture.anyOf((CompletableFuture<?>)null),
3263 +            () -> CompletableFuture.anyOf((CompletableFuture<?>[])null),
3264 +            () -> CompletableFuture.anyOf(f, null),
3265 +            () -> CompletableFuture.anyOf(null, f),
3266 +
3267 +            () -> f.obtrudeException(null),
3268 +
3269 +            () -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3270 +            () -> CompletableFuture.delayedExecutor(1L, null, new ThreadExecutor()),
3271 +            () -> CompletableFuture.delayedExecutor(1L, null),
3272 +
3273 +            () -> f.orTimeout(1L, null),
3274 +            () -> f.completeOnTimeout(42, 1L, null),
3275 +
3276 +            () -> CompletableFuture.failedFuture(null),
3277 +            () -> CompletableFuture.failedStage(null),
3278 +        };
3279 +
3280 +        assertThrows(NullPointerException.class, throwingActions);
3281 +        assertEquals(0, exec.count.get());
3282 +    }
3283 +
3284 +    /**
3285 +     * toCompletableFuture returns this CompletableFuture.
3286 +     */
3287 +    public void testToCompletableFuture() {
3288 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3289 +        assertSame(f, f.toCompletableFuture());
3290 +    }
3291 +
3292 +    // jdk9
3293 +
3294 +    /**
3295 +     * newIncompleteFuture returns an incomplete CompletableFuture
3296 +     */
3297 +    public void testNewIncompleteFuture() {
3298 +        for (Integer v1 : new Integer[] { 1, null })
3299 +    {
3300 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3301 +        CompletableFuture<Integer> g = f.newIncompleteFuture();
3302 +        checkIncomplete(f);
3303 +        checkIncomplete(g);
3304 +        f.complete(v1);
3305 +        checkCompletedNormally(f, v1);
3306 +        checkIncomplete(g);
3307 +        g.complete(v1);
3308 +        checkCompletedNormally(g, v1);
3309 +        assertSame(g.getClass(), CompletableFuture.class);
3310 +    }}
3311 +
3312 +    /**
3313 +     * completedStage returns a completed CompletionStage
3314 +     */
3315 +    public void testCompletedStage() {
3316 +        AtomicInteger x = new AtomicInteger(0);
3317 +        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3318 +        CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3319 +        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3320 +        assertEquals(x.get(), 1);
3321 +        assertNull(r.get());
3322 +    }
3323 +
3324 +    /**
3325 +     * defaultExecutor by default returns the commonPool if
3326 +     * it supports more than one thread.
3327 +     */
3328 +    public void testDefaultExecutor() {
3329 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3330 +        Executor e = f.defaultExecutor();
3331 +        Executor c = ForkJoinPool.commonPool();
3332 +        if (ForkJoinPool.getCommonPoolParallelism() > 1)
3333 +            assertSame(e, c);
3334 +        else
3335 +            assertNotSame(e, c);
3336 +    }
3337 +
3338 +    /**
3339 +     * failedFuture returns a CompletableFuture completed
3340 +     * exceptionally with the given Exception
3341 +     */
3342 +    public void testFailedFuture() {
3343 +        CFException ex = new CFException();
3344 +        CompletableFuture<Integer> f = CompletableFuture.failedFuture(ex);
3345 +        checkCompletedExceptionally(f, ex);
3346 +    }
3347 +
3348 +    /**
3349 +     * failedFuture(null) throws NPE
3350 +     */
3351 +    public void testFailedFuture_null() {
3352 +        try {
3353 +            CompletableFuture<Integer> f = CompletableFuture.failedFuture(null);
3354 +            shouldThrow();
3355 +        } catch (NullPointerException success) {}
3356 +    }
3357 +
3358 +    /**
3359 +     * copy returns a CompletableFuture that is completed normally,
3360 +     * with the same value, when source is.
3361 +     */
3362 +    public void testCopy() {
3363 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3364 +        CompletableFuture<Integer> g = f.copy();
3365 +        checkIncomplete(f);
3366 +        checkIncomplete(g);
3367 +        f.complete(1);
3368 +        checkCompletedNormally(f, 1);
3369 +        checkCompletedNormally(g, 1);
3370 +    }
3371 +
3372 +    /**
3373 +     * copy returns a CompletableFuture that is completed exceptionally
3374 +     * when source is.
3375 +     */
3376 +    public void testCopy2() {
3377 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3378 +        CompletableFuture<Integer> g = f.copy();
3379 +        checkIncomplete(f);
3380 +        checkIncomplete(g);
3381 +        CFException ex = new CFException();
3382 +        f.completeExceptionally(ex);
3383 +        checkCompletedExceptionally(f, ex);
3384 +        checkCompletedWithWrappedException(g, ex);
3385 +    }
3386 +
3387 +    /**
3388 +     * minimalCompletionStage returns a CompletableFuture that is
3389 +     * completed normally, with the same value, when source is.
3390 +     */
3391 +    public void testMinimalCompletionStage() {
3392 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3393 +        CompletionStage<Integer> g = f.minimalCompletionStage();
3394 +        AtomicInteger x = new AtomicInteger(0);
3395 +        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3396 +        checkIncomplete(f);
3397 +        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3398 +        f.complete(1);
3399 +        checkCompletedNormally(f, 1);
3400 +        assertEquals(x.get(), 1);
3401 +        assertNull(r.get());
3402 +    }
3403 +
3404 +    /**
3405 +     * minimalCompletionStage returns a CompletableFuture that is
3406 +     * completed exceptionally when source is.
3407 +     */
3408 +    public void testMinimalCompletionStage2() {
3409 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3410 +        CompletionStage<Integer> g = f.minimalCompletionStage();
3411 +        AtomicInteger x = new AtomicInteger(0);
3412 +        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3413 +        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3414 +        checkIncomplete(f);
3415 +        CFException ex = new CFException();
3416 +        f.completeExceptionally(ex);
3417 +        checkCompletedExceptionally(f, ex);
3418 +        assertEquals(x.get(), 0);
3419 +        assertEquals(r.get().getCause(), ex);
3420 +    }
3421 +
3422 +    /**
3423 +     * failedStage returns a CompletionStage completed
3424 +     * exceptionally with the given Exception
3425 +     */
3426 +    public void testFailedStage() {
3427 +        CFException ex = new CFException();
3428 +        CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3429 +        AtomicInteger x = new AtomicInteger(0);
3430 +        AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3431 +        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3432 +        assertEquals(x.get(), 0);
3433 +        assertEquals(r.get(), ex);
3434 +    }
3435 +
3436 +    /**
3437 +     * completeAsync completes with value of given supplier
3438 +     */
3439 +    public void testCompleteAsync() {
3440 +        for (Integer v1 : new Integer[] { 1, null })
3441 +    {
3442 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3443 +        f.completeAsync(() -> v1);
3444 +        f.join();
3445 +        checkCompletedNormally(f, v1);
3446 +    }}
3447 +
3448 +    /**
3449 +     * completeAsync completes exceptionally if given supplier throws
3450 +     */
3451 +    public void testCompleteAsync2() {
3452 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3453 +        CFException ex = new CFException();
3454 +        f.completeAsync(() -> {if (true) throw ex; return 1;});
3455 +        try {
3456 +            f.join();
3457 +            shouldThrow();
3458 +        } catch (CompletionException success) {}
3459 +        checkCompletedWithWrappedException(f, ex);
3460 +    }
3461 +
3462 +    /**
3463 +     * completeAsync with given executor completes with value of given supplier
3464 +     */
3465 +    public void testCompleteAsync3() {
3466 +        for (Integer v1 : new Integer[] { 1, null })
3467 +    {
3468 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3469 +        ThreadExecutor executor = new ThreadExecutor();
3470 +        f.completeAsync(() -> v1, executor);
3471 +        assertSame(v1, f.join());
3472 +        checkCompletedNormally(f, v1);
3473 +        assertEquals(1, executor.count.get());
3474 +    }}
3475 +
3476 +    /**
3477 +     * completeAsync with given executor completes exceptionally if
3478 +     * given supplier throws
3479 +     */
3480 +    public void testCompleteAsync4() {
3481 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3482 +        CFException ex = new CFException();
3483 +        ThreadExecutor executor = new ThreadExecutor();
3484 +        f.completeAsync(() -> {if (true) throw ex; return 1;}, executor);
3485 +        try {
3486 +            f.join();
3487 +            shouldThrow();
3488 +        } catch (CompletionException success) {}
3489 +        checkCompletedWithWrappedException(f, ex);
3490 +        assertEquals(1, executor.count.get());
3491 +    }
3492 +
3493 +    /**
3494 +     * orTimeout completes with TimeoutException if not complete
3495 +     */
3496 +    public void testOrTimeout_timesOut() {
3497 +        long timeoutMillis = timeoutMillis();
3498 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3499 +        long startTime = System.nanoTime();
3500 +        f.orTimeout(timeoutMillis, MILLISECONDS);
3501 +        checkCompletedWithTimeoutException(f);
3502 +        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3503 +    }
3504 +
3505 +    /**
3506 +     * orTimeout completes normally if completed before timeout
3507 +     */
3508 +    public void testOrTimeout_completed() {
3509 +        for (Integer v1 : new Integer[] { 1, null })
3510 +    {
3511 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3512 +        CompletableFuture<Integer> g = new CompletableFuture<>();
3513 +        long startTime = System.nanoTime();
3514 +        f.complete(v1);
3515 +        f.orTimeout(LONG_DELAY_MS, MILLISECONDS);
3516 +        g.orTimeout(LONG_DELAY_MS, MILLISECONDS);
3517 +        g.complete(v1);
3518 +        checkCompletedNormally(f, v1);
3519 +        checkCompletedNormally(g, v1);
3520 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3521 +    }}
3522 +
3523 +    /**
3524 +     * completeOnTimeout completes with given value if not complete
3525 +     */
3526 +    public void testCompleteOnTimeout_timesOut() {
3527 +        testInParallel(() -> testCompleteOnTimeout_timesOut(42),
3528 +                       () -> testCompleteOnTimeout_timesOut(null));
3529 +    }
3530 +
3531 +    public void testCompleteOnTimeout_timesOut(Integer v) {
3532 +        long timeoutMillis = timeoutMillis();
3533 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3534 +        long startTime = System.nanoTime();
3535 +        f.completeOnTimeout(v, timeoutMillis, MILLISECONDS);
3536 +        assertSame(v, f.join());
3537 +        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3538 +        f.complete(99);         // should have no effect
3539 +        checkCompletedNormally(f, v);
3540 +    }
3541 +
3542 +    /**
3543 +     * completeOnTimeout has no effect if completed within timeout
3544 +     */
3545 +    public void testCompleteOnTimeout_completed() {
3546 +        for (Integer v1 : new Integer[] { 1, null })
3547 +    {
3548 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3549 +        CompletableFuture<Integer> g = new CompletableFuture<>();
3550 +        long startTime = System.nanoTime();
3551 +        f.complete(v1);
3552 +        f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS);
3553 +        g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS);
3554 +        g.complete(v1);
3555 +        checkCompletedNormally(f, v1);
3556 +        checkCompletedNormally(g, v1);
3557 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3558 +    }}
3559 +
3560 +    /**
3561 +     * delayedExecutor returns an executor that delays submission
3562 +     */
3563 +    public void testDelayedExecutor() {
3564 +        testInParallel(() -> testDelayedExecutor(null, null),
3565 +                       () -> testDelayedExecutor(null, 1),
3566 +                       () -> testDelayedExecutor(new ThreadExecutor(), 1),
3567 +                       () -> testDelayedExecutor(new ThreadExecutor(), 1));
3568 +    }
3569 +
3570 +    /**
3571 +     * delayedExecutor returns an executor that delays submission
3572 +     */
3573 +    public void testDelayedExecutor(Executor executor, Integer v) throws Exception {
3574 +        long timeoutMillis = timeoutMillis();
3575 +        // Use an "unreasonably long" long timeout to catch lingering threads
3576 +        long longTimeoutMillis = 1000 * 60 * 60 * 24;
3577 +        final Executor delayer, longDelayer;
3578 +        if (executor == null) {
3579 +            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS);
3580 +            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS);
3581 +        } else {
3582 +            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS, executor);
3583 +            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS, executor);
3584 +        }
3585 +        long startTime = System.nanoTime();
3586 +        CompletableFuture<Integer> f =
3587 +            CompletableFuture.supplyAsync(() -> v, delayer);
3588 +        CompletableFuture<Integer> g =
3589 +            CompletableFuture.supplyAsync(() -> v, longDelayer);
3590 +
3591 +        assertNull(g.getNow(null));
3592 +
3593 +        assertSame(v, f.get(LONG_DELAY_MS, MILLISECONDS));
3594 +        long millisElapsed = millisElapsedSince(startTime);
3595 +        assertTrue(millisElapsed >= timeoutMillis);
3596 +        assertTrue(millisElapsed < LONG_DELAY_MS / 2);
3597 +
3598 +        checkCompletedNormally(f, v);
3599 +
3600 +        checkIncomplete(g);
3601 +        assertTrue(g.cancel(true));
3602 +    }
3603 +
3604 +    //--- tests of implementation details; not part of official tck ---
3605 +
3606 +    Object resultOf(CompletableFuture<?> f) {
3607 +        try {
3608 +            java.lang.reflect.Field resultField
3609 +                = CompletableFuture.class.getDeclaredField("result");
3610 +            resultField.setAccessible(true);
3611 +            return resultField.get(f);
3612 +        } catch (Throwable t) { throw new AssertionError(t); }
3613 +    }
3614 +
3615 +    public void testExceptionPropagationReusesResultObject() {
3616 +        if (!testImplementationDetails) return;
3617 +        for (ExecutionMode m : ExecutionMode.values())
3618 +    {
3619 +        final CFException ex = new CFException();
3620 +        final CompletableFuture<Integer> v42 = CompletableFuture.completedFuture(42);
3621 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3622 +
3623 +        List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> funs
3624 +            = new ArrayList<>();
3625 +
3626 +        funs.add((y) -> m.thenRun(y, new Noop(m)));
3627 +        funs.add((y) -> m.thenAccept(y, new NoopConsumer(m)));
3628 +        funs.add((y) -> m.thenApply(y, new IncFunction(m)));
3629 +
3630 +        funs.add((y) -> m.runAfterEither(y, incomplete, new Noop(m)));
3631 +        funs.add((y) -> m.acceptEither(y, incomplete, new NoopConsumer(m)));
3632 +        funs.add((y) -> m.applyToEither(y, incomplete, new IncFunction(m)));
3633 +
3634 +        funs.add((y) -> m.runAfterBoth(y, v42, new Noop(m)));
3635 +        funs.add((y) -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3636 +        funs.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m)));
3637 +
3638 +        funs.add((y) -> m.whenComplete(y, (Integer x, Throwable t) -> {}));
3639 +
3640 +        funs.add((y) -> m.thenCompose(y, new CompletableFutureInc(m)));
3641 +
3642 +        funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y, v42}));
3643 +        funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y, incomplete}));
3644 +
3645 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3646 +                 fun : funs) {
3647 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3648 +            f.completeExceptionally(ex);
3649 +            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3650 +            checkCompletedWithWrappedException(src, ex);
3651 +            CompletableFuture<?> dep = fun.apply(src);
3652 +            checkCompletedWithWrappedException(dep, ex);
3653 +            assertSame(resultOf(src), resultOf(dep));
3654 +        }
3655 +
3656 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3657 +                 fun : funs) {
3658 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3659 +            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3660 +            CompletableFuture<?> dep = fun.apply(src);
3661 +            f.completeExceptionally(ex);
3662 +            checkCompletedWithWrappedException(src, ex);
3663 +            checkCompletedWithWrappedException(dep, ex);
3664 +            assertSame(resultOf(src), resultOf(dep));
3665 +        }
3666 +
3667 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3668 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3669 +                 fun : funs) {
3670 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3671 +            f.cancel(mayInterruptIfRunning);
3672 +            checkCancelled(f);
3673 +            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3674 +            checkCompletedWithWrappedCancellationException(src);
3675 +            CompletableFuture<?> dep = fun.apply(src);
3676 +            checkCompletedWithWrappedCancellationException(dep);
3677 +            assertSame(resultOf(src), resultOf(dep));
3678 +        }
3679 +
3680 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3681 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3682 +                 fun : funs) {
3683 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3684 +            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3685 +            CompletableFuture<?> dep = fun.apply(src);
3686 +            f.cancel(mayInterruptIfRunning);
3687 +            checkCancelled(f);
3688 +            checkCompletedWithWrappedCancellationException(src);
3689 +            checkCompletedWithWrappedCancellationException(dep);
3690 +            assertSame(resultOf(src), resultOf(dep));
3691 +        }
3692 +    }}
3693 +
3694   }

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