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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 1.101 by jsr166, Sun Feb 22 04:34:44 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.atomic.AtomicInteger;
25 < import static java.util.concurrent.TimeUnit.MILLISECONDS;
26 < import static java.util.concurrent.TimeUnit.SECONDS;
27 < import java.util.*;
25 > import java.util.function.BiConsumer;
26 > import java.util.function.BiFunction;
27 > import java.util.function.Consumer;
28 > import java.util.function.Function;
29 > import java.util.function.Supplier;
30 >
31 > import junit.framework.Test;
32 > import junit.framework.TestSuite;
33  
34   public class CompletableFutureTest extends JSR166TestCase {
35  
# Line 28 | Line 40 | public class CompletableFutureTest exten
40          return new TestSuite(CompletableFutureTest.class);
41      }
42  
43 +    static class CFException extends RuntimeException {}
44 +
45 +    void checkIncomplete(CompletableFuture<?> f) {
46 +        assertFalse(f.isDone());
47 +        assertFalse(f.isCancelled());
48 +        assertTrue(f.toString().contains("[Not completed]"));
49 +        try {
50 +            assertNull(f.getNow(null));
51 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
52 +        try {
53 +            f.get(0L, SECONDS);
54 +            shouldThrow();
55 +        }
56 +        catch (TimeoutException success) {}
57 +        catch (Throwable fail) { threadUnexpectedException(fail); }
58 +    }
59 +
60 +    <T> void checkCompletedNormally(CompletableFuture<T> f, T value) {
61 +        checkTimedGet(f, value);
62 +
63 +        try {
64 +            assertEquals(value, f.join());
65 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
66 +        try {
67 +            assertEquals(value, f.getNow(null));
68 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
69 +        try {
70 +            assertEquals(value, f.get());
71 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
72 +        assertTrue(f.isDone());
73 +        assertFalse(f.isCancelled());
74 +        assertFalse(f.isCompletedExceptionally());
75 +        assertTrue(f.toString().contains("[Completed normally]"));
76 +    }
77 +
78 +    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
79 +        long startTime = System.nanoTime();
80 +        long timeoutMillis = LONG_DELAY_MS;
81 +        try {
82 +            f.get(timeoutMillis, MILLISECONDS);
83 +            shouldThrow();
84 +        } catch (ExecutionException success) {
85 +            assertTrue(success.getCause() instanceof CFException);
86 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
87 +        assertTrue(millisElapsedSince(startTime) < timeoutMillis/2);
88 +
89 +        try {
90 +            f.join();
91 +            shouldThrow();
92 +        } catch (CompletionException success) {
93 +            assertTrue(success.getCause() instanceof CFException);
94 +        }
95 +        try {
96 +            f.getNow(null);
97 +            shouldThrow();
98 +        } catch (CompletionException success) {
99 +            assertTrue(success.getCause() instanceof CFException);
100 +        }
101 +        try {
102 +            f.get();
103 +            shouldThrow();
104 +        } catch (ExecutionException success) {
105 +            assertTrue(success.getCause() instanceof CFException);
106 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
107 +        assertTrue(f.isDone());
108 +        assertFalse(f.isCancelled());
109 +        assertTrue(f.toString().contains("[Completed exceptionally]"));
110 +    }
111 +
112 +    <U> void checkCompletedExceptionallyWithRootCause(CompletableFuture<U> f,
113 +                                                      Throwable ex) {
114 +        long startTime = System.nanoTime();
115 +        long timeoutMillis = LONG_DELAY_MS;
116 +        try {
117 +            f.get(timeoutMillis, MILLISECONDS);
118 +            shouldThrow();
119 +        } catch (ExecutionException success) {
120 +            assertSame(ex, success.getCause());
121 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
122 +        assertTrue(millisElapsedSince(startTime) < timeoutMillis/2);
123 +
124 +        try {
125 +            f.join();
126 +            shouldThrow();
127 +        } catch (CompletionException success) {
128 +            assertSame(ex, success.getCause());
129 +        }
130 +        try {
131 +            f.getNow(null);
132 +            shouldThrow();
133 +        } catch (CompletionException success) {
134 +            assertSame(ex, success.getCause());
135 +        }
136 +        try {
137 +            f.get();
138 +            shouldThrow();
139 +        } catch (ExecutionException success) {
140 +            assertSame(ex, success.getCause());
141 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
142 +
143 +        assertTrue(f.isDone());
144 +        assertFalse(f.isCancelled());
145 +        assertTrue(f.toString().contains("[Completed exceptionally]"));
146 +    }
147 +
148 +    <U> void checkCompletedWithWrappedException(CompletableFuture<U> f,
149 +                                                Throwable ex) {
150 +        checkCompletedExceptionallyWithRootCause(f, ex);
151 +        try {
152 +            CompletableFuture<Throwable> spy = f.handle
153 +                ((U u, Throwable t) -> t);
154 +            assertTrue(spy.join() instanceof CompletionException);
155 +            assertSame(ex, spy.join().getCause());
156 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
157 +    }
158 +
159 +    <U> void checkCompletedExceptionally(CompletableFuture<U> f, Throwable ex) {
160 +        checkCompletedExceptionallyWithRootCause(f, ex);
161 +        try {
162 +            CompletableFuture<Throwable> spy = f.handle
163 +                ((U u, Throwable t) -> t);
164 +            assertSame(ex, spy.join());
165 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
166 +    }
167 +
168 +    void checkCancelled(CompletableFuture<?> f) {
169 +        long startTime = System.nanoTime();
170 +        long timeoutMillis = LONG_DELAY_MS;
171 +        try {
172 +            f.get(timeoutMillis, MILLISECONDS);
173 +            shouldThrow();
174 +        } catch (CancellationException success) {
175 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
176 +        assertTrue(millisElapsedSince(startTime) < timeoutMillis/2);
177 +
178 +        try {
179 +            f.join();
180 +            shouldThrow();
181 +        } catch (CancellationException success) {}
182 +        try {
183 +            f.getNow(null);
184 +            shouldThrow();
185 +        } catch (CancellationException success) {}
186 +        try {
187 +            f.get();
188 +            shouldThrow();
189 +        } catch (CancellationException success) {
190 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
191 +        assertTrue(f.isDone());
192 +        assertTrue(f.isCompletedExceptionally());
193 +        assertTrue(f.isCancelled());
194 +        assertTrue(f.toString().contains("[Completed exceptionally]"));
195 +    }
196 +
197 +    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
198 +        long startTime = System.nanoTime();
199 +        long timeoutMillis = LONG_DELAY_MS;
200 +        try {
201 +            f.get(timeoutMillis, MILLISECONDS);
202 +            shouldThrow();
203 +        } catch (ExecutionException success) {
204 +            assertTrue(success.getCause() instanceof CancellationException);
205 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
206 +        assertTrue(millisElapsedSince(startTime) < timeoutMillis/2);
207 +
208 +        try {
209 +            f.join();
210 +            shouldThrow();
211 +        } catch (CompletionException success) {
212 +            assertTrue(success.getCause() instanceof CancellationException);
213 +        }
214 +        try {
215 +            f.getNow(null);
216 +            shouldThrow();
217 +        } catch (CompletionException success) {
218 +            assertTrue(success.getCause() instanceof CancellationException);
219 +        }
220 +        try {
221 +            f.get();
222 +            shouldThrow();
223 +        } catch (ExecutionException success) {
224 +            assertTrue(success.getCause() instanceof CancellationException);
225 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
226 +        assertTrue(f.isDone());
227 +        assertFalse(f.isCancelled());
228 +        assertTrue(f.isCompletedExceptionally());
229 +        assertTrue(f.toString().contains("[Completed exceptionally]"));
230 +    }
231 +
232 +    /**
233 +     * A newly constructed CompletableFuture is incomplete, as indicated
234 +     * by methods isDone, isCancelled, and getNow
235 +     */
236 +    public void testConstructor() {
237 +        CompletableFuture<Integer> f = new CompletableFuture<>();
238 +        checkIncomplete(f);
239 +    }
240 +
241 +    /**
242 +     * complete completes normally, as indicated by methods isDone,
243 +     * isCancelled, join, get, and getNow
244 +     */
245 +    public void testComplete() {
246 +        for (Integer v1 : new Integer[] { 1, null })
247 +    {
248 +        CompletableFuture<Integer> f = new CompletableFuture<>();
249 +        checkIncomplete(f);
250 +        assertTrue(f.complete(v1));
251 +        assertFalse(f.complete(v1));
252 +        checkCompletedNormally(f, v1);
253 +    }}
254 +
255 +    /**
256 +     * completeExceptionally completes exceptionally, as indicated by
257 +     * methods isDone, isCancelled, join, get, and getNow
258 +     */
259 +    public void testCompleteExceptionally() {
260 +        CompletableFuture<Integer> f = new CompletableFuture<>();
261 +        CFException ex = new CFException();
262 +        checkIncomplete(f);
263 +        f.completeExceptionally(ex);
264 +        checkCompletedExceptionally(f, ex);
265 +    }
266 +
267 +    /**
268 +     * cancel completes exceptionally and reports cancelled, as indicated by
269 +     * methods isDone, isCancelled, join, get, and getNow
270 +     */
271 +    public void testCancel() {
272 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
273 +    {
274 +        CompletableFuture<Integer> f = new CompletableFuture<>();
275 +        checkIncomplete(f);
276 +        assertTrue(f.cancel(mayInterruptIfRunning));
277 +        assertTrue(f.cancel(mayInterruptIfRunning));
278 +        assertTrue(f.cancel(!mayInterruptIfRunning));
279 +        checkCancelled(f);
280 +    }}
281 +
282 +    /**
283 +     * obtrudeValue forces completion with given value
284 +     */
285 +    public void testObtrudeValue() {
286 +        CompletableFuture<Integer> f = new CompletableFuture<>();
287 +        checkIncomplete(f);
288 +        assertTrue(f.complete(one));
289 +        checkCompletedNormally(f, one);
290 +        f.obtrudeValue(three);
291 +        checkCompletedNormally(f, three);
292 +        f.obtrudeValue(two);
293 +        checkCompletedNormally(f, two);
294 +        f = new CompletableFuture<>();
295 +        f.obtrudeValue(three);
296 +        checkCompletedNormally(f, three);
297 +        f.obtrudeValue(null);
298 +        checkCompletedNormally(f, null);
299 +        f = new CompletableFuture<>();
300 +        f.completeExceptionally(new CFException());
301 +        f.obtrudeValue(four);
302 +        checkCompletedNormally(f, four);
303 +    }
304 +
305 +    /**
306 +     * obtrudeException forces completion with given exception
307 +     */
308 +    public void testObtrudeException() {
309 +        for (Integer v1 : new Integer[] { 1, null })
310 +    {
311 +        CFException ex;
312 +        CompletableFuture<Integer> f;
313 +
314 +        f = new CompletableFuture<>();
315 +        assertTrue(f.complete(v1));
316 +        for (int i = 0; i < 2; i++) {
317 +            f.obtrudeException(ex = new CFException());
318 +            checkCompletedExceptionally(f, ex);
319 +        }
320 +
321 +        f = new CompletableFuture<>();
322 +        for (int i = 0; i < 2; i++) {
323 +            f.obtrudeException(ex = new CFException());
324 +            checkCompletedExceptionally(f, ex);
325 +        }
326 +
327 +        f = new CompletableFuture<>();
328 +        f.completeExceptionally(ex = new CFException());
329 +        f.obtrudeValue(v1);
330 +        checkCompletedNormally(f, v1);
331 +        f.obtrudeException(ex = new CFException());
332 +        checkCompletedExceptionally(f, ex);
333 +        f.completeExceptionally(new CFException());
334 +        checkCompletedExceptionally(f, ex);
335 +        assertFalse(f.complete(v1));
336 +        checkCompletedExceptionally(f, ex);
337 +    }}
338 +
339 +    /**
340 +     * getNumberOfDependents returns number of dependent tasks
341 +     */
342 +    public void testGetNumberOfDependents() {
343 +        for (ExecutionMode m : ExecutionMode.values())
344 +        for (Integer v1 : new Integer[] { 1, null })
345 +    {
346 +        CompletableFuture<Integer> f = new CompletableFuture<>();
347 +        assertEquals(0, f.getNumberOfDependents());
348 +        final CompletableFuture<Void> g = m.thenRun(f, new Noop(m));
349 +        assertEquals(1, f.getNumberOfDependents());
350 +        assertEquals(0, g.getNumberOfDependents());
351 +        final CompletableFuture<Void> h = m.thenRun(f, new Noop(m));
352 +        assertEquals(2, f.getNumberOfDependents());
353 +        assertEquals(0, h.getNumberOfDependents());
354 +        assertTrue(f.complete(v1));
355 +        checkCompletedNormally(g, null);
356 +        checkCompletedNormally(h, null);
357 +        assertEquals(0, f.getNumberOfDependents());
358 +        assertEquals(0, g.getNumberOfDependents());
359 +        assertEquals(0, h.getNumberOfDependents());
360 +    }}
361 +
362 +    /**
363 +     * toString indicates current completion state
364 +     */
365      public void testToString() {
366          CompletableFuture<String> f;
367  
368          f = new CompletableFuture<String>();
369          assertTrue(f.toString().contains("[Not completed]"));
370  
371 <        f.complete("foo");
371 >        assertTrue(f.complete("foo"));
372          assertTrue(f.toString().contains("[Completed normally]"));
373  
374          f = new CompletableFuture<String>();
375 <        f.completeExceptionally(new IndexOutOfBoundsException());
375 >        assertTrue(f.completeExceptionally(new IndexOutOfBoundsException()));
376          assertTrue(f.toString().contains("[Completed exceptionally]"));
377 +
378 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
379 +            f = new CompletableFuture<String>();
380 +            assertTrue(f.cancel(mayInterruptIfRunning));
381 +            assertTrue(f.toString().contains("[Completed exceptionally]"));
382 +        }
383 +    }
384 +
385 +    /**
386 +     * completedFuture returns a completed CompletableFuture with given value
387 +     */
388 +    public void testCompletedFuture() {
389 +        CompletableFuture<String> f = CompletableFuture.completedFuture("test");
390 +        checkCompletedNormally(f, "test");
391 +    }
392 +
393 +    abstract class CheckedAction {
394 +        int invocationCount = 0;
395 +        final ExecutionMode m;
396 +        CheckedAction(ExecutionMode m) { this.m = m; }
397 +        void invoked() {
398 +            m.checkExecutionMode();
399 +            assertEquals(0, invocationCount++);
400 +        }
401 +        void assertNotInvoked() { assertEquals(0, invocationCount); }
402 +        void assertInvoked() { assertEquals(1, invocationCount); }
403 +    }
404 +
405 +    abstract class CheckedIntegerAction extends CheckedAction {
406 +        Integer value;
407 +        CheckedIntegerAction(ExecutionMode m) { super(m); }
408 +        void assertValue(Integer expected) {
409 +            assertInvoked();
410 +            assertEquals(expected, value);
411 +        }
412 +    }
413 +
414 +    class IntegerSupplier extends CheckedAction
415 +        implements Supplier<Integer>
416 +    {
417 +        final Integer value;
418 +        IntegerSupplier(ExecutionMode m, Integer value) {
419 +            super(m);
420 +            this.value = value;
421 +        }
422 +        public Integer get() {
423 +            invoked();
424 +            return value;
425 +        }
426 +    }
427 +
428 +    // A function that handles and produces null values as well.
429 +    static Integer inc(Integer x) {
430 +        return (x == null) ? null : x + 1;
431 +    }
432 +
433 +    class NoopConsumer extends CheckedIntegerAction
434 +        implements Consumer<Integer>
435 +    {
436 +        NoopConsumer(ExecutionMode m) { super(m); }
437 +        public void accept(Integer x) {
438 +            invoked();
439 +            value = x;
440 +        }
441 +    }
442 +
443 +    class IncFunction extends CheckedIntegerAction
444 +        implements Function<Integer,Integer>
445 +    {
446 +        IncFunction(ExecutionMode m) { super(m); }
447 +        public Integer apply(Integer x) {
448 +            invoked();
449 +            return value = inc(x);
450 +        }
451 +    }
452 +
453 +    // Choose non-commutative actions for better coverage
454 +    // A non-commutative function that handles and produces null values as well.
455 +    static Integer subtract(Integer x, Integer y) {
456 +        return (x == null && y == null) ? null :
457 +            ((x == null) ? 42 : x.intValue())
458 +            - ((y == null) ? 99 : y.intValue());
459 +    }
460 +
461 +    class SubtractAction extends CheckedIntegerAction
462 +        implements BiConsumer<Integer, Integer>
463 +    {
464 +        SubtractAction(ExecutionMode m) { super(m); }
465 +        public void accept(Integer x, Integer y) {
466 +            invoked();
467 +            value = subtract(x, y);
468 +        }
469 +    }
470 +
471 +    class SubtractFunction extends CheckedIntegerAction
472 +        implements BiFunction<Integer, Integer, Integer>
473 +    {
474 +        SubtractFunction(ExecutionMode m) { super(m); }
475 +        public Integer apply(Integer x, Integer y) {
476 +            invoked();
477 +            return value = subtract(x, y);
478 +        }
479 +    }
480 +
481 +    class Noop extends CheckedAction implements Runnable {
482 +        Noop(ExecutionMode m) { super(m); }
483 +        public void run() {
484 +            invoked();
485 +        }
486 +    }
487 +
488 +    class FailingSupplier extends CheckedAction
489 +        implements Supplier<Integer>
490 +    {
491 +        FailingSupplier(ExecutionMode m) { super(m); }
492 +        public Integer get() {
493 +            invoked();
494 +            throw new CFException();
495 +        }
496 +    }
497 +
498 +    class FailingConsumer extends CheckedIntegerAction
499 +        implements Consumer<Integer>
500 +    {
501 +        FailingConsumer(ExecutionMode m) { super(m); }
502 +        public void accept(Integer x) {
503 +            invoked();
504 +            value = x;
505 +            throw new CFException();
506 +        }
507 +    }
508 +
509 +    class FailingBiConsumer extends CheckedIntegerAction
510 +        implements BiConsumer<Integer, Integer>
511 +    {
512 +        FailingBiConsumer(ExecutionMode m) { super(m); }
513 +        public void accept(Integer x, Integer y) {
514 +            invoked();
515 +            value = subtract(x, y);
516 +            throw new CFException();
517 +        }
518 +    }
519 +
520 +    class FailingFunction extends CheckedIntegerAction
521 +        implements Function<Integer, Integer>
522 +    {
523 +        FailingFunction(ExecutionMode m) { super(m); }
524 +        public Integer apply(Integer x) {
525 +            invoked();
526 +            value = x;
527 +            throw new CFException();
528 +        }
529 +    }
530 +
531 +    class FailingBiFunction extends CheckedIntegerAction
532 +        implements BiFunction<Integer, Integer, Integer>
533 +    {
534 +        FailingBiFunction(ExecutionMode m) { super(m); }
535 +        public Integer apply(Integer x, Integer y) {
536 +            invoked();
537 +            value = subtract(x, y);
538 +            throw new CFException();
539 +        }
540 +    }
541 +
542 +    class FailingRunnable extends CheckedAction implements Runnable {
543 +        FailingRunnable(ExecutionMode m) { super(m); }
544 +        public void run() {
545 +            invoked();
546 +            throw new CFException();
547 +        }
548 +    }
549 +
550 +    class CompletableFutureInc extends CheckedIntegerAction
551 +        implements Function<Integer, CompletableFuture<Integer>>
552 +    {
553 +        CompletableFutureInc(ExecutionMode m) { super(m); }
554 +        public CompletableFuture<Integer> apply(Integer x) {
555 +            invoked();
556 +            value = x;
557 +            CompletableFuture<Integer> f = new CompletableFuture<>();
558 +            assertTrue(f.complete(inc(x)));
559 +            return f;
560 +        }
561 +    }
562 +
563 +    class FailingCompletableFutureFunction extends CheckedIntegerAction
564 +        implements Function<Integer, CompletableFuture<Integer>>
565 +    {
566 +        FailingCompletableFutureFunction(ExecutionMode m) { super(m); }
567 +        public CompletableFuture<Integer> apply(Integer x) {
568 +            invoked();
569 +            value = x;
570 +            throw new CFException();
571 +        }
572 +    }
573 +
574 +    // Used for explicit executor tests
575 +    static final class ThreadExecutor implements Executor {
576 +        final AtomicInteger count = new AtomicInteger(0);
577 +        static final ThreadGroup tg = new ThreadGroup("ThreadExecutor");
578 +        static boolean startedCurrentThread() {
579 +            return Thread.currentThread().getThreadGroup() == tg;
580 +        }
581 +
582 +        public void execute(Runnable r) {
583 +            count.getAndIncrement();
584 +            new Thread(tg, r).start();
585 +        }
586 +    }
587 +
588 +    static final boolean defaultExecutorIsCommonPool
589 +        = ForkJoinPool.getCommonPoolParallelism() > 1;
590 +
591 +    /**
592 +     * Permits the testing of parallel code for the 3 different
593 +     * execution modes without copy/pasting all the test methods.
594 +     */
595 +    enum ExecutionMode {
596 +        SYNC {
597 +            public void checkExecutionMode() {
598 +                assertFalse(ThreadExecutor.startedCurrentThread());
599 +                assertNull(ForkJoinTask.getPool());
600 +            }
601 +            public CompletableFuture<Void> runAsync(Runnable a) {
602 +                throw new UnsupportedOperationException();
603 +            }
604 +            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
605 +                throw new UnsupportedOperationException();
606 +            }
607 +            public <T> CompletableFuture<Void> thenRun
608 +                (CompletableFuture<T> f, Runnable a) {
609 +                return f.thenRun(a);
610 +            }
611 +            public <T> CompletableFuture<Void> thenAccept
612 +                (CompletableFuture<T> f, Consumer<? super T> a) {
613 +                return f.thenAccept(a);
614 +            }
615 +            public <T,U> CompletableFuture<U> thenApply
616 +                (CompletableFuture<T> f, Function<? super T,U> a) {
617 +                return f.thenApply(a);
618 +            }
619 +            public <T,U> CompletableFuture<U> thenCompose
620 +                (CompletableFuture<T> f,
621 +                 Function<? super T,? extends CompletionStage<U>> a) {
622 +                return f.thenCompose(a);
623 +            }
624 +            public <T,U> CompletableFuture<U> handle
625 +                (CompletableFuture<T> f,
626 +                 BiFunction<? super T,Throwable,? extends U> a) {
627 +                return f.handle(a);
628 +            }
629 +            public <T> CompletableFuture<T> whenComplete
630 +                (CompletableFuture<T> f,
631 +                 BiConsumer<? super T,? super Throwable> a) {
632 +                return f.whenComplete(a);
633 +            }
634 +            public <T,U> CompletableFuture<Void> runAfterBoth
635 +                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
636 +                return f.runAfterBoth(g, a);
637 +            }
638 +            public <T,U> CompletableFuture<Void> thenAcceptBoth
639 +                (CompletableFuture<T> f,
640 +                 CompletionStage<? extends U> g,
641 +                 BiConsumer<? super T,? super U> a) {
642 +                return f.thenAcceptBoth(g, a);
643 +            }
644 +            public <T,U,V> CompletableFuture<V> thenCombine
645 +                (CompletableFuture<T> f,
646 +                 CompletionStage<? extends U> g,
647 +                 BiFunction<? super T,? super U,? extends V> a) {
648 +                return f.thenCombine(g, a);
649 +            }
650 +            public <T> CompletableFuture<Void> runAfterEither
651 +                (CompletableFuture<T> f,
652 +                 CompletionStage<?> g,
653 +                 java.lang.Runnable a) {
654 +                return f.runAfterEither(g, a);
655 +            }
656 +            public <T> CompletableFuture<Void> acceptEither
657 +                (CompletableFuture<T> f,
658 +                 CompletionStage<? extends T> g,
659 +                 Consumer<? super T> a) {
660 +                return f.acceptEither(g, a);
661 +            }
662 +            public <T,U> CompletableFuture<U> applyToEither
663 +                (CompletableFuture<T> f,
664 +                 CompletionStage<? extends T> g,
665 +                 Function<? super T,U> a) {
666 +                return f.applyToEither(g, a);
667 +            }
668 +        },
669 +
670 +        ASYNC {
671 +            public void checkExecutionMode() {
672 +                assertEquals(defaultExecutorIsCommonPool,
673 +                             (ForkJoinPool.commonPool() == ForkJoinTask.getPool()));
674 +            }
675 +            public CompletableFuture<Void> runAsync(Runnable a) {
676 +                return CompletableFuture.runAsync(a);
677 +            }
678 +            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
679 +                return CompletableFuture.supplyAsync(a);
680 +            }
681 +            public <T> CompletableFuture<Void> thenRun
682 +                (CompletableFuture<T> f, Runnable a) {
683 +                return f.thenRunAsync(a);
684 +            }
685 +            public <T> CompletableFuture<Void> thenAccept
686 +                (CompletableFuture<T> f, Consumer<? super T> a) {
687 +                return f.thenAcceptAsync(a);
688 +            }
689 +            public <T,U> CompletableFuture<U> thenApply
690 +                (CompletableFuture<T> f, Function<? super T,U> a) {
691 +                return f.thenApplyAsync(a);
692 +            }
693 +            public <T,U> CompletableFuture<U> thenCompose
694 +                (CompletableFuture<T> f,
695 +                 Function<? super T,? extends CompletionStage<U>> a) {
696 +                return f.thenComposeAsync(a);
697 +            }
698 +            public <T,U> CompletableFuture<U> handle
699 +                (CompletableFuture<T> f,
700 +                 BiFunction<? super T,Throwable,? extends U> a) {
701 +                return f.handleAsync(a);
702 +            }
703 +            public <T> CompletableFuture<T> whenComplete
704 +                (CompletableFuture<T> f,
705 +                 BiConsumer<? super T,? super Throwable> a) {
706 +                return f.whenCompleteAsync(a);
707 +            }
708 +            public <T,U> CompletableFuture<Void> runAfterBoth
709 +                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
710 +                return f.runAfterBothAsync(g, a);
711 +            }
712 +            public <T,U> CompletableFuture<Void> thenAcceptBoth
713 +                (CompletableFuture<T> f,
714 +                 CompletionStage<? extends U> g,
715 +                 BiConsumer<? super T,? super U> a) {
716 +                return f.thenAcceptBothAsync(g, a);
717 +            }
718 +            public <T,U,V> CompletableFuture<V> thenCombine
719 +                (CompletableFuture<T> f,
720 +                 CompletionStage<? extends U> g,
721 +                 BiFunction<? super T,? super U,? extends V> a) {
722 +                return f.thenCombineAsync(g, a);
723 +            }
724 +            public <T> CompletableFuture<Void> runAfterEither
725 +                (CompletableFuture<T> f,
726 +                 CompletionStage<?> g,
727 +                 java.lang.Runnable a) {
728 +                return f.runAfterEitherAsync(g, a);
729 +            }
730 +            public <T> CompletableFuture<Void> acceptEither
731 +                (CompletableFuture<T> f,
732 +                 CompletionStage<? extends T> g,
733 +                 Consumer<? super T> a) {
734 +                return f.acceptEitherAsync(g, a);
735 +            }
736 +            public <T,U> CompletableFuture<U> applyToEither
737 +                (CompletableFuture<T> f,
738 +                 CompletionStage<? extends T> g,
739 +                 Function<? super T,U> a) {
740 +                return f.applyToEitherAsync(g, a);
741 +            }
742 +        },
743 +
744 +        EXECUTOR {
745 +            public void checkExecutionMode() {
746 +                assertTrue(ThreadExecutor.startedCurrentThread());
747 +            }
748 +            public CompletableFuture<Void> runAsync(Runnable a) {
749 +                return CompletableFuture.runAsync(a, new ThreadExecutor());
750 +            }
751 +            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
752 +                return CompletableFuture.supplyAsync(a, new ThreadExecutor());
753 +            }
754 +            public <T> CompletableFuture<Void> thenRun
755 +                (CompletableFuture<T> f, Runnable a) {
756 +                return f.thenRunAsync(a, new ThreadExecutor());
757 +            }
758 +            public <T> CompletableFuture<Void> thenAccept
759 +                (CompletableFuture<T> f, Consumer<? super T> a) {
760 +                return f.thenAcceptAsync(a, new ThreadExecutor());
761 +            }
762 +            public <T,U> CompletableFuture<U> thenApply
763 +                (CompletableFuture<T> f, Function<? super T,U> a) {
764 +                return f.thenApplyAsync(a, new ThreadExecutor());
765 +            }
766 +            public <T,U> CompletableFuture<U> thenCompose
767 +                (CompletableFuture<T> f,
768 +                 Function<? super T,? extends CompletionStage<U>> a) {
769 +                return f.thenComposeAsync(a, new ThreadExecutor());
770 +            }
771 +            public <T,U> CompletableFuture<U> handle
772 +                (CompletableFuture<T> f,
773 +                 BiFunction<? super T,Throwable,? extends U> a) {
774 +                return f.handleAsync(a, new ThreadExecutor());
775 +            }
776 +            public <T> CompletableFuture<T> whenComplete
777 +                (CompletableFuture<T> f,
778 +                 BiConsumer<? super T,? super Throwable> a) {
779 +                return f.whenCompleteAsync(a, new ThreadExecutor());
780 +            }
781 +            public <T,U> CompletableFuture<Void> runAfterBoth
782 +                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
783 +                return f.runAfterBothAsync(g, a, new ThreadExecutor());
784 +            }
785 +            public <T,U> CompletableFuture<Void> thenAcceptBoth
786 +                (CompletableFuture<T> f,
787 +                 CompletionStage<? extends U> g,
788 +                 BiConsumer<? super T,? super U> a) {
789 +                return f.thenAcceptBothAsync(g, a, new ThreadExecutor());
790 +            }
791 +            public <T,U,V> CompletableFuture<V> thenCombine
792 +                (CompletableFuture<T> f,
793 +                 CompletionStage<? extends U> g,
794 +                 BiFunction<? super T,? super U,? extends V> a) {
795 +                return f.thenCombineAsync(g, a, new ThreadExecutor());
796 +            }
797 +            public <T> CompletableFuture<Void> runAfterEither
798 +                (CompletableFuture<T> f,
799 +                 CompletionStage<?> g,
800 +                 java.lang.Runnable a) {
801 +                return f.runAfterEitherAsync(g, a, new ThreadExecutor());
802 +            }
803 +            public <T> CompletableFuture<Void> acceptEither
804 +                (CompletableFuture<T> f,
805 +                 CompletionStage<? extends T> g,
806 +                 Consumer<? super T> a) {
807 +                return f.acceptEitherAsync(g, a, new ThreadExecutor());
808 +            }
809 +            public <T,U> CompletableFuture<U> applyToEither
810 +                (CompletableFuture<T> f,
811 +                 CompletionStage<? extends T> g,
812 +                 Function<? super T,U> a) {
813 +                return f.applyToEitherAsync(g, a, new ThreadExecutor());
814 +            }
815 +        };
816 +
817 +        public abstract void checkExecutionMode();
818 +        public abstract CompletableFuture<Void> runAsync(Runnable a);
819 +        public abstract <U> CompletableFuture<U> supplyAsync(Supplier<U> a);
820 +        public abstract <T> CompletableFuture<Void> thenRun
821 +            (CompletableFuture<T> f, Runnable a);
822 +        public abstract <T> CompletableFuture<Void> thenAccept
823 +            (CompletableFuture<T> f, Consumer<? super T> a);
824 +        public abstract <T,U> CompletableFuture<U> thenApply
825 +            (CompletableFuture<T> f, Function<? super T,U> a);
826 +        public abstract <T,U> CompletableFuture<U> thenCompose
827 +            (CompletableFuture<T> f,
828 +             Function<? super T,? extends CompletionStage<U>> a);
829 +        public abstract <T,U> CompletableFuture<U> handle
830 +            (CompletableFuture<T> f,
831 +             BiFunction<? super T,Throwable,? extends U> a);
832 +        public abstract <T> CompletableFuture<T> whenComplete
833 +            (CompletableFuture<T> f,
834 +             BiConsumer<? super T,? super Throwable> a);
835 +        public abstract <T,U> CompletableFuture<Void> runAfterBoth
836 +            (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a);
837 +        public abstract <T,U> CompletableFuture<Void> thenAcceptBoth
838 +            (CompletableFuture<T> f,
839 +             CompletionStage<? extends U> g,
840 +             BiConsumer<? super T,? super U> a);
841 +        public abstract <T,U,V> CompletableFuture<V> thenCombine
842 +            (CompletableFuture<T> f,
843 +             CompletionStage<? extends U> g,
844 +             BiFunction<? super T,? super U,? extends V> a);
845 +        public abstract <T> CompletableFuture<Void> runAfterEither
846 +            (CompletableFuture<T> f,
847 +             CompletionStage<?> g,
848 +             java.lang.Runnable a);
849 +        public abstract <T> CompletableFuture<Void> acceptEither
850 +            (CompletableFuture<T> f,
851 +             CompletionStage<? extends T> g,
852 +             Consumer<? super T> a);
853 +        public abstract <T,U> CompletableFuture<U> applyToEither
854 +            (CompletableFuture<T> f,
855 +             CompletionStage<? extends T> g,
856 +             Function<? super T,U> a);
857 +    }
858 +
859 +    /**
860 +     * exceptionally action is not invoked when source completes
861 +     * normally, and source result is propagated
862 +     */
863 +    public void testExceptionally_normalCompletion() {
864 +        for (boolean createIncomplete : new boolean[] { true, false })
865 +        for (Integer v1 : new Integer[] { 1, null })
866 +    {
867 +        final AtomicInteger a = new AtomicInteger(0);
868 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
869 +        if (!createIncomplete) assertTrue(f.complete(v1));
870 +        final CompletableFuture<Integer> g = f.exceptionally
871 +            ((Throwable t) -> {
872 +                // Should not be called
873 +                a.getAndIncrement();
874 +                throw new AssertionError();
875 +            });
876 +        if (createIncomplete) assertTrue(f.complete(v1));
877 +
878 +        checkCompletedNormally(g, v1);
879 +        checkCompletedNormally(f, v1);
880 +        assertEquals(0, a.get());
881 +    }}
882 +
883 +    /**
884 +     * exceptionally action completes with function value on source
885 +     * exception
886 +     */
887 +    public void testExceptionally_exceptionalCompletion() {
888 +        for (boolean createIncomplete : new boolean[] { true, false })
889 +        for (Integer v1 : new Integer[] { 1, null })
890 +    {
891 +        final AtomicInteger a = new AtomicInteger(0);
892 +        final CFException ex = new CFException();
893 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
894 +        if (!createIncomplete) f.completeExceptionally(ex);
895 +        final CompletableFuture<Integer> g = f.exceptionally
896 +            ((Throwable t) -> {
897 +                ExecutionMode.SYNC.checkExecutionMode();
898 +                threadAssertSame(t, ex);
899 +                a.getAndIncrement();
900 +                return v1;
901 +            });
902 +        if (createIncomplete) f.completeExceptionally(ex);
903 +
904 +        checkCompletedNormally(g, v1);
905 +        assertEquals(1, a.get());
906 +    }}
907 +
908 +    public void testExceptionally_exceptionalCompletionActionFailed() {
909 +        for (boolean createIncomplete : new boolean[] { true, false })
910 +    {
911 +        final AtomicInteger a = new AtomicInteger(0);
912 +        final CFException ex1 = new CFException();
913 +        final CFException ex2 = new CFException();
914 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
915 +        if (!createIncomplete) f.completeExceptionally(ex1);
916 +        final CompletableFuture<Integer> g = f.exceptionally
917 +            ((Throwable t) -> {
918 +                ExecutionMode.SYNC.checkExecutionMode();
919 +                threadAssertSame(t, ex1);
920 +                a.getAndIncrement();
921 +                throw ex2;
922 +            });
923 +        if (createIncomplete) f.completeExceptionally(ex1);
924 +
925 +        checkCompletedWithWrappedException(g, ex2);
926 +        assertEquals(1, a.get());
927 +    }}
928 +
929 +    /**
930 +     * whenComplete action executes on normal completion, propagating
931 +     * source result.
932 +     */
933 +    public void testWhenComplete_normalCompletion1() {
934 +        for (ExecutionMode m : ExecutionMode.values())
935 +        for (boolean createIncomplete : new boolean[] { true, false })
936 +        for (Integer v1 : new Integer[] { 1, null })
937 +    {
938 +        final AtomicInteger a = new AtomicInteger(0);
939 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
940 +        if (!createIncomplete) assertTrue(f.complete(v1));
941 +        final CompletableFuture<Integer> g = m.whenComplete
942 +            (f,
943 +             (Integer x, Throwable t) -> {
944 +                m.checkExecutionMode();
945 +                threadAssertSame(x, v1);
946 +                threadAssertNull(t);
947 +                a.getAndIncrement();
948 +            });
949 +        if (createIncomplete) assertTrue(f.complete(v1));
950 +
951 +        checkCompletedNormally(g, v1);
952 +        checkCompletedNormally(f, v1);
953 +        assertEquals(1, a.get());
954 +    }}
955 +
956 +    /**
957 +     * whenComplete action executes on exceptional completion, propagating
958 +     * source result.
959 +     */
960 +    public void testWhenComplete_exceptionalCompletion() {
961 +        for (ExecutionMode m : ExecutionMode.values())
962 +        for (boolean createIncomplete : new boolean[] { true, false })
963 +    {
964 +        final AtomicInteger a = new AtomicInteger(0);
965 +        final CFException ex = new CFException();
966 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
967 +        if (!createIncomplete) f.completeExceptionally(ex);
968 +        final CompletableFuture<Integer> g = m.whenComplete
969 +            (f,
970 +             (Integer x, Throwable t) -> {
971 +                m.checkExecutionMode();
972 +                threadAssertNull(x);
973 +                threadAssertSame(t, ex);
974 +                a.getAndIncrement();
975 +            });
976 +        if (createIncomplete) f.completeExceptionally(ex);
977 +
978 +        checkCompletedWithWrappedException(g, ex);
979 +        checkCompletedExceptionally(f, ex);
980 +        assertEquals(1, a.get());
981 +    }}
982 +
983 +    /**
984 +     * whenComplete action executes on cancelled source, propagating
985 +     * CancellationException.
986 +     */
987 +    public void testWhenComplete_sourceCancelled() {
988 +        for (ExecutionMode m : ExecutionMode.values())
989 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
990 +        for (boolean createIncomplete : new boolean[] { true, false })
991 +    {
992 +        final AtomicInteger a = new AtomicInteger(0);
993 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
994 +        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
995 +        final CompletableFuture<Integer> g = m.whenComplete
996 +            (f,
997 +             (Integer x, Throwable t) -> {
998 +                m.checkExecutionMode();
999 +                threadAssertNull(x);
1000 +                threadAssertTrue(t instanceof CancellationException);
1001 +                a.getAndIncrement();
1002 +            });
1003 +        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1004 +
1005 +        checkCompletedWithWrappedCancellationException(g);
1006 +        checkCancelled(f);
1007 +        assertEquals(1, a.get());
1008 +    }}
1009 +
1010 +    /**
1011 +     * If a whenComplete action throws an exception when triggered by
1012 +     * a normal completion, it completes exceptionally
1013 +     */
1014 +    public void testWhenComplete_actionFailed() {
1015 +        for (boolean createIncomplete : new boolean[] { true, false })
1016 +        for (ExecutionMode m : ExecutionMode.values())
1017 +        for (Integer v1 : new Integer[] { 1, null })
1018 +    {
1019 +        final AtomicInteger a = new AtomicInteger(0);
1020 +        final CFException ex = new CFException();
1021 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1022 +        if (!createIncomplete) assertTrue(f.complete(v1));
1023 +        final CompletableFuture<Integer> g = m.whenComplete
1024 +            (f,
1025 +             (Integer x, Throwable t) -> {
1026 +                m.checkExecutionMode();
1027 +                threadAssertSame(x, v1);
1028 +                threadAssertNull(t);
1029 +                a.getAndIncrement();
1030 +                throw ex;
1031 +            });
1032 +        if (createIncomplete) assertTrue(f.complete(v1));
1033 +
1034 +        checkCompletedWithWrappedException(g, ex);
1035 +        checkCompletedNormally(f, v1);
1036 +        assertEquals(1, a.get());
1037 +    }}
1038 +
1039 +    /**
1040 +     * If a whenComplete action throws an exception when triggered by
1041 +     * a source completion that also throws an exception, the source
1042 +     * exception takes precedence.
1043 +     */
1044 +    public void testWhenComplete_actionFailedSourceFailed() {
1045 +        for (boolean createIncomplete : new boolean[] { true, false })
1046 +        for (ExecutionMode m : ExecutionMode.values())
1047 +    {
1048 +        final AtomicInteger a = new AtomicInteger(0);
1049 +        final CFException ex1 = new CFException();
1050 +        final CFException ex2 = new CFException();
1051 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1052 +
1053 +        if (!createIncomplete) f.completeExceptionally(ex1);
1054 +        final CompletableFuture<Integer> g = m.whenComplete
1055 +            (f,
1056 +             (Integer x, Throwable t) -> {
1057 +                m.checkExecutionMode();
1058 +                threadAssertSame(t, ex1);
1059 +                threadAssertNull(x);
1060 +                a.getAndIncrement();
1061 +                throw ex2;
1062 +            });
1063 +        if (createIncomplete) f.completeExceptionally(ex1);
1064 +
1065 +        checkCompletedWithWrappedException(g, ex1);
1066 +        checkCompletedExceptionally(f, ex1);
1067 +        assertEquals(1, a.get());
1068 +    }}
1069 +
1070 +    /**
1071 +     * handle action completes normally with function value on normal
1072 +     * completion of source
1073 +     */
1074 +    public void testHandle_normalCompletion() {
1075 +        for (ExecutionMode m : ExecutionMode.values())
1076 +        for (boolean createIncomplete : new boolean[] { true, false })
1077 +        for (Integer v1 : new Integer[] { 1, null })
1078 +    {
1079 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1080 +        final AtomicInteger a = new AtomicInteger(0);
1081 +        if (!createIncomplete) assertTrue(f.complete(v1));
1082 +        final CompletableFuture<Integer> g = m.handle
1083 +            (f,
1084 +             (Integer x, Throwable t) -> {
1085 +                m.checkExecutionMode();
1086 +                threadAssertSame(x, v1);
1087 +                threadAssertNull(t);
1088 +                a.getAndIncrement();
1089 +                return inc(v1);
1090 +            });
1091 +        if (createIncomplete) assertTrue(f.complete(v1));
1092 +
1093 +        checkCompletedNormally(g, inc(v1));
1094 +        checkCompletedNormally(f, v1);
1095 +        assertEquals(1, a.get());
1096 +    }}
1097 +
1098 +    /**
1099 +     * handle action completes normally with function value on
1100 +     * exceptional completion of source
1101 +     */
1102 +    public void testHandle_exceptionalCompletion() {
1103 +        for (ExecutionMode m : ExecutionMode.values())
1104 +        for (boolean createIncomplete : new boolean[] { true, false })
1105 +        for (Integer v1 : new Integer[] { 1, null })
1106 +    {
1107 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1108 +        final AtomicInteger a = new AtomicInteger(0);
1109 +        final CFException ex = new CFException();
1110 +        if (!createIncomplete) f.completeExceptionally(ex);
1111 +        final CompletableFuture<Integer> g = m.handle
1112 +            (f,
1113 +             (Integer x, Throwable t) -> {
1114 +                m.checkExecutionMode();
1115 +                threadAssertNull(x);
1116 +                threadAssertSame(t, ex);
1117 +                a.getAndIncrement();
1118 +                return v1;
1119 +            });
1120 +        if (createIncomplete) f.completeExceptionally(ex);
1121 +
1122 +        checkCompletedNormally(g, v1);
1123 +        checkCompletedExceptionally(f, ex);
1124 +        assertEquals(1, a.get());
1125 +    }}
1126 +
1127 +    /**
1128 +     * handle action completes normally with function value on
1129 +     * cancelled source
1130 +     */
1131 +    public void testHandle_sourceCancelled() {
1132 +        for (ExecutionMode m : ExecutionMode.values())
1133 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1134 +        for (boolean createIncomplete : new boolean[] { true, false })
1135 +        for (Integer v1 : new Integer[] { 1, null })
1136 +    {
1137 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1138 +        final AtomicInteger a = new AtomicInteger(0);
1139 +        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1140 +        final CompletableFuture<Integer> g = m.handle
1141 +            (f,
1142 +             (Integer x, Throwable t) -> {
1143 +                m.checkExecutionMode();
1144 +                threadAssertNull(x);
1145 +                threadAssertTrue(t instanceof CancellationException);
1146 +                a.getAndIncrement();
1147 +                return v1;
1148 +            });
1149 +        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1150 +
1151 +        checkCompletedNormally(g, v1);
1152 +        checkCancelled(f);
1153 +        assertEquals(1, a.get());
1154 +    }}
1155 +
1156 +    /**
1157 +     * handle result completes exceptionally if action does
1158 +     */
1159 +    public void testHandle_sourceFailedActionFailed() {
1160 +        for (ExecutionMode m : ExecutionMode.values())
1161 +        for (boolean createIncomplete : new boolean[] { true, false })
1162 +    {
1163 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1164 +        final AtomicInteger a = new AtomicInteger(0);
1165 +        final CFException ex1 = new CFException();
1166 +        final CFException ex2 = new CFException();
1167 +        if (!createIncomplete) f.completeExceptionally(ex1);
1168 +        final CompletableFuture<Integer> g = m.handle
1169 +            (f,
1170 +             (Integer x, Throwable t) -> {
1171 +                m.checkExecutionMode();
1172 +                threadAssertNull(x);
1173 +                threadAssertSame(ex1, t);
1174 +                a.getAndIncrement();
1175 +                throw ex2;
1176 +            });
1177 +        if (createIncomplete) f.completeExceptionally(ex1);
1178 +
1179 +        checkCompletedWithWrappedException(g, ex2);
1180 +        checkCompletedExceptionally(f, ex1);
1181 +        assertEquals(1, a.get());
1182 +    }}
1183 +
1184 +    public void testHandle_sourceCompletedNormallyActionFailed() {
1185 +        for (ExecutionMode m : ExecutionMode.values())
1186 +        for (boolean createIncomplete : new boolean[] { true, false })
1187 +        for (Integer v1 : new Integer[] { 1, null })
1188 +    {
1189 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1190 +        final AtomicInteger a = new AtomicInteger(0);
1191 +        final CFException ex = new CFException();
1192 +        if (!createIncomplete) assertTrue(f.complete(v1));
1193 +        final CompletableFuture<Integer> g = m.handle
1194 +            (f,
1195 +             (Integer x, Throwable t) -> {
1196 +                m.checkExecutionMode();
1197 +                threadAssertSame(x, v1);
1198 +                threadAssertNull(t);
1199 +                a.getAndIncrement();
1200 +                throw ex;
1201 +            });
1202 +        if (createIncomplete) assertTrue(f.complete(v1));
1203 +
1204 +        checkCompletedWithWrappedException(g, ex);
1205 +        checkCompletedNormally(f, v1);
1206 +        assertEquals(1, a.get());
1207 +    }}
1208 +
1209 +    /**
1210 +     * runAsync completes after running Runnable
1211 +     */
1212 +    public void testRunAsync_normalCompletion() {
1213 +        ExecutionMode[] executionModes = {
1214 +            ExecutionMode.ASYNC,
1215 +            ExecutionMode.EXECUTOR,
1216 +        };
1217 +        for (ExecutionMode m : executionModes)
1218 +    {
1219 +        final Noop r = new Noop(m);
1220 +        final CompletableFuture<Void> f = m.runAsync(r);
1221 +        assertNull(f.join());
1222 +        checkCompletedNormally(f, null);
1223 +        r.assertInvoked();
1224 +    }}
1225 +
1226 +    /**
1227 +     * failing runAsync completes exceptionally after running Runnable
1228 +     */
1229 +    public void testRunAsync_exceptionalCompletion() {
1230 +        ExecutionMode[] executionModes = {
1231 +            ExecutionMode.ASYNC,
1232 +            ExecutionMode.EXECUTOR,
1233 +        };
1234 +        for (ExecutionMode m : executionModes)
1235 +    {
1236 +        final FailingRunnable r = new FailingRunnable(m);
1237 +        final CompletableFuture<Void> f = m.runAsync(r);
1238 +        checkCompletedWithWrappedCFException(f);
1239 +        r.assertInvoked();
1240 +    }}
1241 +
1242 +    /**
1243 +     * supplyAsync completes with result of supplier
1244 +     */
1245 +    public void testSupplyAsync_normalCompletion() {
1246 +        ExecutionMode[] executionModes = {
1247 +            ExecutionMode.ASYNC,
1248 +            ExecutionMode.EXECUTOR,
1249 +        };
1250 +        for (ExecutionMode m : executionModes)
1251 +        for (Integer v1 : new Integer[] { 1, null })
1252 +    {
1253 +        final IntegerSupplier r = new IntegerSupplier(m, v1);
1254 +        final CompletableFuture<Integer> f = m.supplyAsync(r);
1255 +        assertSame(v1, f.join());
1256 +        checkCompletedNormally(f, v1);
1257 +        r.assertInvoked();
1258 +    }}
1259 +
1260 +    /**
1261 +     * Failing supplyAsync completes exceptionally
1262 +     */
1263 +    public void testSupplyAsync_exceptionalCompletion() {
1264 +        ExecutionMode[] executionModes = {
1265 +            ExecutionMode.ASYNC,
1266 +            ExecutionMode.EXECUTOR,
1267 +        };
1268 +        for (ExecutionMode m : executionModes)
1269 +    {
1270 +        FailingSupplier r = new FailingSupplier(m);
1271 +        CompletableFuture<Integer> f = m.supplyAsync(r);
1272 +        checkCompletedWithWrappedCFException(f);
1273 +        r.assertInvoked();
1274 +    }}
1275 +
1276 +    // seq completion methods
1277 +
1278 +    /**
1279 +     * thenRun result completes normally after normal completion of source
1280 +     */
1281 +    public void testThenRun_normalCompletion() {
1282 +        for (ExecutionMode m : ExecutionMode.values())
1283 +        for (Integer v1 : new Integer[] { 1, null })
1284 +    {
1285 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1286 +        final Noop[] rs = new Noop[6];
1287 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1288 +
1289 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1290 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1291 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1292 +        checkIncomplete(h0);
1293 +        checkIncomplete(h1);
1294 +        checkIncomplete(h2);
1295 +        assertTrue(f.complete(v1));
1296 +        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1297 +        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1298 +        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1299 +
1300 +        checkCompletedNormally(h0, null);
1301 +        checkCompletedNormally(h1, null);
1302 +        checkCompletedNormally(h2, null);
1303 +        checkCompletedNormally(h3, null);
1304 +        checkCompletedNormally(h4, null);
1305 +        checkCompletedNormally(h5, null);
1306 +        checkCompletedNormally(f, v1);
1307 +        for (Noop r : rs) r.assertInvoked();
1308 +    }}
1309 +
1310 +    /**
1311 +     * thenRun result completes exceptionally after exceptional
1312 +     * completion of source
1313 +     */
1314 +    public void testThenRun_exceptionalCompletion() {
1315 +        for (ExecutionMode m : ExecutionMode.values())
1316 +    {
1317 +        final CFException ex = new CFException();
1318 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1319 +        final Noop[] rs = new Noop[6];
1320 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1321 +
1322 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1323 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1324 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1325 +        checkIncomplete(h0);
1326 +        checkIncomplete(h1);
1327 +        checkIncomplete(h2);
1328 +        assertTrue(f.completeExceptionally(ex));
1329 +        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1330 +        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1331 +        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1332 +
1333 +        checkCompletedWithWrappedException(h0, ex);
1334 +        checkCompletedWithWrappedException(h1, ex);
1335 +        checkCompletedWithWrappedException(h2, ex);
1336 +        checkCompletedWithWrappedException(h3, ex);
1337 +        checkCompletedWithWrappedException(h4, ex);
1338 +        checkCompletedWithWrappedException(h5, ex);
1339 +        checkCompletedExceptionally(f, ex);
1340 +        for (Noop r : rs) r.assertNotInvoked();
1341 +    }}
1342 +
1343 +    /**
1344 +     * thenRun result completes exceptionally if source cancelled
1345 +     */
1346 +    public void testThenRun_sourceCancelled() {
1347 +        for (ExecutionMode m : ExecutionMode.values())
1348 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1349 +    {
1350 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1351 +        final Noop[] rs = new Noop[6];
1352 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1353 +
1354 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1355 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1356 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1357 +        checkIncomplete(h0);
1358 +        checkIncomplete(h1);
1359 +        checkIncomplete(h2);
1360 +        assertTrue(f.cancel(mayInterruptIfRunning));
1361 +        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1362 +        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1363 +        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1364 +
1365 +        checkCompletedWithWrappedCancellationException(h0);
1366 +        checkCompletedWithWrappedCancellationException(h1);
1367 +        checkCompletedWithWrappedCancellationException(h2);
1368 +        checkCompletedWithWrappedCancellationException(h3);
1369 +        checkCompletedWithWrappedCancellationException(h4);
1370 +        checkCompletedWithWrappedCancellationException(h5);
1371 +        checkCancelled(f);
1372 +        for (Noop r : rs) r.assertNotInvoked();
1373 +    }}
1374 +
1375 +    /**
1376 +     * thenRun result completes exceptionally if action does
1377 +     */
1378 +    public void testThenRun_actionFailed() {
1379 +        for (ExecutionMode m : ExecutionMode.values())
1380 +        for (Integer v1 : new Integer[] { 1, null })
1381 +    {
1382 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1383 +        final FailingRunnable[] rs = new FailingRunnable[6];
1384 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
1385 +
1386 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1387 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1388 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1389 +        assertTrue(f.complete(v1));
1390 +        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1391 +        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1392 +        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1393 +
1394 +        checkCompletedWithWrappedCFException(h0);
1395 +        checkCompletedWithWrappedCFException(h1);
1396 +        checkCompletedWithWrappedCFException(h2);
1397 +        checkCompletedWithWrappedCFException(h3);
1398 +        checkCompletedWithWrappedCFException(h4);
1399 +        checkCompletedWithWrappedCFException(h5);
1400 +        checkCompletedNormally(f, v1);
1401 +    }}
1402 +
1403 +    /**
1404 +     * thenApply result completes normally after normal completion of source
1405 +     */
1406 +    public void testThenApply_normalCompletion() {
1407 +        for (ExecutionMode m : ExecutionMode.values())
1408 +        for (Integer v1 : new Integer[] { 1, null })
1409 +    {
1410 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1411 +        final IncFunction[] rs = new IncFunction[4];
1412 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1413 +
1414 +        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1415 +        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1416 +        checkIncomplete(h0);
1417 +        checkIncomplete(h1);
1418 +        assertTrue(f.complete(v1));
1419 +        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1420 +        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1421 +
1422 +        checkCompletedNormally(h0, inc(v1));
1423 +        checkCompletedNormally(h1, inc(v1));
1424 +        checkCompletedNormally(h2, inc(v1));
1425 +        checkCompletedNormally(h3, inc(v1));
1426 +        checkCompletedNormally(f, v1);
1427 +        for (IncFunction r : rs) r.assertValue(inc(v1));
1428 +    }}
1429 +
1430 +    /**
1431 +     * thenApply result completes exceptionally after exceptional
1432 +     * completion of source
1433 +     */
1434 +    public void testThenApply_exceptionalCompletion() {
1435 +        for (ExecutionMode m : ExecutionMode.values())
1436 +    {
1437 +        final CFException ex = new CFException();
1438 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1439 +        final IncFunction[] rs = new IncFunction[4];
1440 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1441 +
1442 +        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1443 +        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1444 +        assertTrue(f.completeExceptionally(ex));
1445 +        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1446 +        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1447 +
1448 +        checkCompletedWithWrappedException(h0, ex);
1449 +        checkCompletedWithWrappedException(h1, ex);
1450 +        checkCompletedWithWrappedException(h2, ex);
1451 +        checkCompletedWithWrappedException(h3, ex);
1452 +        checkCompletedExceptionally(f, ex);
1453 +        for (IncFunction r : rs) r.assertNotInvoked();
1454 +    }}
1455 +
1456 +    /**
1457 +     * thenApply result completes exceptionally if source cancelled
1458 +     */
1459 +    public void testThenApply_sourceCancelled() {
1460 +        for (ExecutionMode m : ExecutionMode.values())
1461 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1462 +    {
1463 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1464 +        final IncFunction[] rs = new IncFunction[4];
1465 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1466 +
1467 +        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1468 +        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1469 +        assertTrue(f.cancel(mayInterruptIfRunning));
1470 +        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1471 +        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1472 +
1473 +        checkCompletedWithWrappedCancellationException(h0);
1474 +        checkCompletedWithWrappedCancellationException(h1);
1475 +        checkCompletedWithWrappedCancellationException(h2);
1476 +        checkCompletedWithWrappedCancellationException(h3);
1477 +        checkCancelled(f);
1478 +        for (IncFunction r : rs) r.assertNotInvoked();
1479 +    }}
1480 +
1481 +    /**
1482 +     * thenApply result completes exceptionally if action does
1483 +     */
1484 +    public void testThenApply_actionFailed() {
1485 +        for (ExecutionMode m : ExecutionMode.values())
1486 +        for (Integer v1 : new Integer[] { 1, null })
1487 +    {
1488 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1489 +        final FailingFunction[] rs = new FailingFunction[4];
1490 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
1491 +
1492 +        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1493 +        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1494 +        assertTrue(f.complete(v1));
1495 +        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1496 +        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1497 +
1498 +        checkCompletedWithWrappedCFException(h0);
1499 +        checkCompletedWithWrappedCFException(h1);
1500 +        checkCompletedWithWrappedCFException(h2);
1501 +        checkCompletedWithWrappedCFException(h3);
1502 +        checkCompletedNormally(f, v1);
1503 +    }}
1504 +
1505 +    /**
1506 +     * thenAccept result completes normally after normal completion of source
1507 +     */
1508 +    public void testThenAccept_normalCompletion() {
1509 +        for (ExecutionMode m : ExecutionMode.values())
1510 +        for (Integer v1 : new Integer[] { 1, null })
1511 +    {
1512 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1513 +        final NoopConsumer[] rs = new NoopConsumer[4];
1514 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1515 +
1516 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1517 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1518 +        checkIncomplete(h0);
1519 +        checkIncomplete(h1);
1520 +        assertTrue(f.complete(v1));
1521 +        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1522 +        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1523 +
1524 +        checkCompletedNormally(h0, null);
1525 +        checkCompletedNormally(h1, null);
1526 +        checkCompletedNormally(h2, null);
1527 +        checkCompletedNormally(h3, null);
1528 +        checkCompletedNormally(f, v1);
1529 +        for (NoopConsumer r : rs) r.assertValue(v1);
1530 +    }}
1531 +
1532 +    /**
1533 +     * thenAccept result completes exceptionally after exceptional
1534 +     * completion of source
1535 +     */
1536 +    public void testThenAccept_exceptionalCompletion() {
1537 +        for (ExecutionMode m : ExecutionMode.values())
1538 +    {
1539 +        final CFException ex = new CFException();
1540 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1541 +        final NoopConsumer[] rs = new NoopConsumer[4];
1542 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1543 +
1544 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1545 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1546 +        assertTrue(f.completeExceptionally(ex));
1547 +        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1548 +        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1549 +
1550 +        checkCompletedWithWrappedException(h0, ex);
1551 +        checkCompletedWithWrappedException(h1, ex);
1552 +        checkCompletedWithWrappedException(h2, ex);
1553 +        checkCompletedWithWrappedException(h3, ex);
1554 +        checkCompletedExceptionally(f, ex);
1555 +        for (NoopConsumer r : rs) r.assertNotInvoked();
1556 +    }}
1557 +
1558 +    /**
1559 +     * thenAccept result completes exceptionally if source cancelled
1560 +     */
1561 +    public void testThenAccept_sourceCancelled() {
1562 +        for (ExecutionMode m : ExecutionMode.values())
1563 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1564 +    {
1565 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1566 +        final NoopConsumer[] rs = new NoopConsumer[4];
1567 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1568 +
1569 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1570 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1571 +        assertTrue(f.cancel(mayInterruptIfRunning));
1572 +        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1573 +        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1574 +
1575 +        checkCompletedWithWrappedCancellationException(h0);
1576 +        checkCompletedWithWrappedCancellationException(h1);
1577 +        checkCompletedWithWrappedCancellationException(h2);
1578 +        checkCompletedWithWrappedCancellationException(h3);
1579 +        checkCancelled(f);
1580 +        for (NoopConsumer r : rs) r.assertNotInvoked();
1581 +    }}
1582 +
1583 +    /**
1584 +     * thenAccept result completes exceptionally if action does
1585 +     */
1586 +    public void testThenAccept_actionFailed() {
1587 +        for (ExecutionMode m : ExecutionMode.values())
1588 +        for (Integer v1 : new Integer[] { 1, null })
1589 +    {
1590 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1591 +        final FailingConsumer[] rs = new FailingConsumer[4];
1592 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
1593 +
1594 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1595 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1596 +        assertTrue(f.complete(v1));
1597 +        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1598 +        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1599 +
1600 +        checkCompletedWithWrappedCFException(h0);
1601 +        checkCompletedWithWrappedCFException(h1);
1602 +        checkCompletedWithWrappedCFException(h2);
1603 +        checkCompletedWithWrappedCFException(h3);
1604 +        checkCompletedNormally(f, v1);
1605 +    }}
1606 +
1607 +    /**
1608 +     * thenCombine result completes normally after normal completion
1609 +     * of sources
1610 +     */
1611 +    public void testThenCombine_normalCompletion() {
1612 +        for (ExecutionMode m : ExecutionMode.values())
1613 +        for (boolean fFirst : new boolean[] { true, false })
1614 +        for (Integer v1 : new Integer[] { 1, null })
1615 +        for (Integer v2 : new Integer[] { 2, null })
1616 +    {
1617 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1618 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1619 +        final SubtractFunction[] rs = new SubtractFunction[6];
1620 +        for (int i = 0; i < rs.length; i++) rs[i] = new SubtractFunction(m);
1621 +
1622 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1623 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1624 +        final Integer w1 =  fFirst ? v1 : v2;
1625 +        final Integer w2 = !fFirst ? v1 : v2;
1626 +
1627 +        final CompletableFuture<Integer> h0 = m.thenCombine(f, g, rs[0]);
1628 +        final CompletableFuture<Integer> h1 = m.thenCombine(fst, fst, rs[1]);
1629 +        assertTrue(fst.complete(w1));
1630 +        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, rs[2]);
1631 +        final CompletableFuture<Integer> h3 = m.thenCombine(fst, fst, rs[3]);
1632 +        checkIncomplete(h0); rs[0].assertNotInvoked();
1633 +        checkIncomplete(h2); rs[2].assertNotInvoked();
1634 +        checkCompletedNormally(h1, subtract(w1, w1));
1635 +        checkCompletedNormally(h3, subtract(w1, w1));
1636 +        rs[1].assertValue(subtract(w1, w1));
1637 +        rs[3].assertValue(subtract(w1, w1));
1638 +        assertTrue(snd.complete(w2));
1639 +        final CompletableFuture<Integer> h4 = m.thenCombine(f, g, rs[4]);
1640 +
1641 +        checkCompletedNormally(h0, subtract(v1, v2));
1642 +        checkCompletedNormally(h2, subtract(v1, v2));
1643 +        checkCompletedNormally(h4, subtract(v1, v2));
1644 +        rs[0].assertValue(subtract(v1, v2));
1645 +        rs[2].assertValue(subtract(v1, v2));
1646 +        rs[4].assertValue(subtract(v1, v2));
1647 +
1648 +        checkCompletedNormally(f, v1);
1649 +        checkCompletedNormally(g, v2);
1650 +    }}
1651 +
1652 +    /**
1653 +     * thenCombine result completes exceptionally after exceptional
1654 +     * completion of either source
1655 +     */
1656 +    public void testThenCombine_exceptionalCompletion() throws Throwable {
1657 +        for (ExecutionMode m : ExecutionMode.values())
1658 +        for (boolean fFirst : new boolean[] { true, false })
1659 +        for (boolean failFirst : new boolean[] { true, false })
1660 +        for (Integer v1 : new Integer[] { 1, null })
1661 +    {
1662 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1663 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1664 +        final CFException ex = new CFException();
1665 +        final SubtractFunction r1 = new SubtractFunction(m);
1666 +        final SubtractFunction r2 = new SubtractFunction(m);
1667 +        final SubtractFunction r3 = new SubtractFunction(m);
1668 +
1669 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1670 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1671 +        final Callable<Boolean> complete1 = failFirst ?
1672 +            () -> fst.completeExceptionally(ex) :
1673 +            () -> fst.complete(v1);
1674 +        final Callable<Boolean> complete2 = failFirst ?
1675 +            () -> snd.complete(v1) :
1676 +            () -> snd.completeExceptionally(ex);
1677 +
1678 +        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1679 +        assertTrue(complete1.call());
1680 +        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1681 +        checkIncomplete(h1);
1682 +        checkIncomplete(h2);
1683 +        assertTrue(complete2.call());
1684 +        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1685 +
1686 +        checkCompletedWithWrappedException(h1, ex);
1687 +        checkCompletedWithWrappedException(h2, ex);
1688 +        checkCompletedWithWrappedException(h3, ex);
1689 +        r1.assertNotInvoked();
1690 +        r2.assertNotInvoked();
1691 +        r3.assertNotInvoked();
1692 +        checkCompletedNormally(failFirst ? snd : fst, v1);
1693 +        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1694 +    }}
1695 +
1696 +    /**
1697 +     * thenCombine result completes exceptionally if either source cancelled
1698 +     */
1699 +    public void testThenCombine_sourceCancelled() throws Throwable {
1700 +        for (ExecutionMode m : ExecutionMode.values())
1701 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1702 +        for (boolean fFirst : new boolean[] { true, false })
1703 +        for (boolean failFirst : new boolean[] { true, false })
1704 +        for (Integer v1 : new Integer[] { 1, null })
1705 +    {
1706 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1707 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1708 +        final SubtractFunction r1 = new SubtractFunction(m);
1709 +        final SubtractFunction r2 = new SubtractFunction(m);
1710 +        final SubtractFunction r3 = new SubtractFunction(m);
1711 +
1712 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1713 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1714 +        final Callable<Boolean> complete1 = failFirst ?
1715 +            () -> fst.cancel(mayInterruptIfRunning) :
1716 +            () -> fst.complete(v1);
1717 +        final Callable<Boolean> complete2 = failFirst ?
1718 +            () -> snd.complete(v1) :
1719 +            () -> snd.cancel(mayInterruptIfRunning);
1720 +
1721 +        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1722 +        assertTrue(complete1.call());
1723 +        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1724 +        checkIncomplete(h1);
1725 +        checkIncomplete(h2);
1726 +        assertTrue(complete2.call());
1727 +        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1728 +
1729 +        checkCompletedWithWrappedCancellationException(h1);
1730 +        checkCompletedWithWrappedCancellationException(h2);
1731 +        checkCompletedWithWrappedCancellationException(h3);
1732 +        r1.assertNotInvoked();
1733 +        r2.assertNotInvoked();
1734 +        r3.assertNotInvoked();
1735 +        checkCompletedNormally(failFirst ? snd : fst, v1);
1736 +        checkCancelled(failFirst ? fst : snd);
1737 +    }}
1738 +
1739 +    /**
1740 +     * thenCombine result completes exceptionally if action does
1741 +     */
1742 +    public void testThenCombine_actionFailed() {
1743 +        for (ExecutionMode m : ExecutionMode.values())
1744 +        for (boolean fFirst : new boolean[] { true, false })
1745 +        for (Integer v1 : new Integer[] { 1, null })
1746 +        for (Integer v2 : new Integer[] { 2, null })
1747 +    {
1748 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1749 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1750 +        final FailingBiFunction r1 = new FailingBiFunction(m);
1751 +        final FailingBiFunction r2 = new FailingBiFunction(m);
1752 +        final FailingBiFunction r3 = new FailingBiFunction(m);
1753 +
1754 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1755 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1756 +        final Integer w1 =  fFirst ? v1 : v2;
1757 +        final Integer w2 = !fFirst ? v1 : v2;
1758 +
1759 +        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1760 +        assertTrue(fst.complete(w1));
1761 +        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1762 +        assertTrue(snd.complete(w2));
1763 +        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1764 +
1765 +        checkCompletedWithWrappedCFException(h1);
1766 +        checkCompletedWithWrappedCFException(h2);
1767 +        checkCompletedWithWrappedCFException(h3);
1768 +        r1.assertInvoked();
1769 +        r2.assertInvoked();
1770 +        r3.assertInvoked();
1771 +        checkCompletedNormally(f, v1);
1772 +        checkCompletedNormally(g, v2);
1773 +    }}
1774 +
1775 +    /**
1776 +     * thenAcceptBoth result completes normally after normal
1777 +     * completion of sources
1778 +     */
1779 +    public void testThenAcceptBoth_normalCompletion() {
1780 +        for (ExecutionMode m : ExecutionMode.values())
1781 +        for (boolean fFirst : new boolean[] { true, false })
1782 +        for (Integer v1 : new Integer[] { 1, null })
1783 +        for (Integer v2 : new Integer[] { 2, null })
1784 +    {
1785 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1786 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1787 +        final SubtractAction r1 = new SubtractAction(m);
1788 +        final SubtractAction r2 = new SubtractAction(m);
1789 +        final SubtractAction r3 = new SubtractAction(m);
1790 +
1791 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1792 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1793 +        final Integer w1 =  fFirst ? v1 : v2;
1794 +        final Integer w2 = !fFirst ? v1 : v2;
1795 +
1796 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1797 +        assertTrue(fst.complete(w1));
1798 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1799 +        checkIncomplete(h1);
1800 +        checkIncomplete(h2);
1801 +        r1.assertNotInvoked();
1802 +        r2.assertNotInvoked();
1803 +        assertTrue(snd.complete(w2));
1804 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1805 +
1806 +        checkCompletedNormally(h1, null);
1807 +        checkCompletedNormally(h2, null);
1808 +        checkCompletedNormally(h3, null);
1809 +        r1.assertValue(subtract(v1, v2));
1810 +        r2.assertValue(subtract(v1, v2));
1811 +        r3.assertValue(subtract(v1, v2));
1812 +        checkCompletedNormally(f, v1);
1813 +        checkCompletedNormally(g, v2);
1814 +    }}
1815 +
1816 +    /**
1817 +     * thenAcceptBoth result completes exceptionally after exceptional
1818 +     * completion of either source
1819 +     */
1820 +    public void testThenAcceptBoth_exceptionalCompletion() throws Throwable {
1821 +        for (ExecutionMode m : ExecutionMode.values())
1822 +        for (boolean fFirst : new boolean[] { true, false })
1823 +        for (boolean failFirst : new boolean[] { true, false })
1824 +        for (Integer v1 : new Integer[] { 1, null })
1825 +    {
1826 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1827 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1828 +        final CFException ex = new CFException();
1829 +        final SubtractAction r1 = new SubtractAction(m);
1830 +        final SubtractAction r2 = new SubtractAction(m);
1831 +        final SubtractAction r3 = new SubtractAction(m);
1832 +
1833 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1834 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1835 +        final Callable<Boolean> complete1 = failFirst ?
1836 +            () -> fst.completeExceptionally(ex) :
1837 +            () -> fst.complete(v1);
1838 +        final Callable<Boolean> complete2 = failFirst ?
1839 +            () -> snd.complete(v1) :
1840 +            () -> snd.completeExceptionally(ex);
1841 +
1842 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1843 +        assertTrue(complete1.call());
1844 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1845 +        checkIncomplete(h1);
1846 +        checkIncomplete(h2);
1847 +        assertTrue(complete2.call());
1848 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1849 +
1850 +        checkCompletedWithWrappedException(h1, ex);
1851 +        checkCompletedWithWrappedException(h2, ex);
1852 +        checkCompletedWithWrappedException(h3, ex);
1853 +        r1.assertNotInvoked();
1854 +        r2.assertNotInvoked();
1855 +        r3.assertNotInvoked();
1856 +        checkCompletedNormally(failFirst ? snd : fst, v1);
1857 +        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1858 +    }}
1859 +
1860 +    /**
1861 +     * thenAcceptBoth result completes exceptionally if either source cancelled
1862 +     */
1863 +    public void testThenAcceptBoth_sourceCancelled() throws Throwable {
1864 +        for (ExecutionMode m : ExecutionMode.values())
1865 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1866 +        for (boolean fFirst : new boolean[] { true, false })
1867 +        for (boolean failFirst : new boolean[] { true, false })
1868 +        for (Integer v1 : new Integer[] { 1, null })
1869 +    {
1870 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1871 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1872 +        final SubtractAction r1 = new SubtractAction(m);
1873 +        final SubtractAction r2 = new SubtractAction(m);
1874 +        final SubtractAction r3 = new SubtractAction(m);
1875 +
1876 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1877 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1878 +        final Callable<Boolean> complete1 = failFirst ?
1879 +            () -> fst.cancel(mayInterruptIfRunning) :
1880 +            () -> fst.complete(v1);
1881 +        final Callable<Boolean> complete2 = failFirst ?
1882 +            () -> snd.complete(v1) :
1883 +            () -> snd.cancel(mayInterruptIfRunning);
1884 +
1885 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1886 +        assertTrue(complete1.call());
1887 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1888 +        checkIncomplete(h1);
1889 +        checkIncomplete(h2);
1890 +        assertTrue(complete2.call());
1891 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1892 +
1893 +        checkCompletedWithWrappedCancellationException(h1);
1894 +        checkCompletedWithWrappedCancellationException(h2);
1895 +        checkCompletedWithWrappedCancellationException(h3);
1896 +        r1.assertNotInvoked();
1897 +        r2.assertNotInvoked();
1898 +        r3.assertNotInvoked();
1899 +        checkCompletedNormally(failFirst ? snd : fst, v1);
1900 +        checkCancelled(failFirst ? fst : snd);
1901 +    }}
1902 +
1903 +    /**
1904 +     * thenAcceptBoth result completes exceptionally if action does
1905 +     */
1906 +    public void testThenAcceptBoth_actionFailed() {
1907 +        for (ExecutionMode m : ExecutionMode.values())
1908 +        for (boolean fFirst : new boolean[] { true, false })
1909 +        for (Integer v1 : new Integer[] { 1, null })
1910 +        for (Integer v2 : new Integer[] { 2, null })
1911 +    {
1912 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1913 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1914 +        final FailingBiConsumer r1 = new FailingBiConsumer(m);
1915 +        final FailingBiConsumer r2 = new FailingBiConsumer(m);
1916 +        final FailingBiConsumer r3 = new FailingBiConsumer(m);
1917 +
1918 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1919 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1920 +        final Integer w1 =  fFirst ? v1 : v2;
1921 +        final Integer w2 = !fFirst ? v1 : v2;
1922 +
1923 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1924 +        assertTrue(fst.complete(w1));
1925 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1926 +        assertTrue(snd.complete(w2));
1927 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1928 +
1929 +        checkCompletedWithWrappedCFException(h1);
1930 +        checkCompletedWithWrappedCFException(h2);
1931 +        checkCompletedWithWrappedCFException(h3);
1932 +        r1.assertInvoked();
1933 +        r2.assertInvoked();
1934 +        r3.assertInvoked();
1935 +        checkCompletedNormally(f, v1);
1936 +        checkCompletedNormally(g, v2);
1937 +    }}
1938 +
1939 +    /**
1940 +     * runAfterBoth result completes normally after normal
1941 +     * completion of sources
1942 +     */
1943 +    public void testRunAfterBoth_normalCompletion() {
1944 +        for (ExecutionMode m : ExecutionMode.values())
1945 +        for (boolean fFirst : new boolean[] { true, false })
1946 +        for (Integer v1 : new Integer[] { 1, null })
1947 +        for (Integer v2 : new Integer[] { 2, null })
1948 +    {
1949 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1950 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1951 +        final Noop r1 = new Noop(m);
1952 +        final Noop r2 = new Noop(m);
1953 +        final Noop r3 = new Noop(m);
1954 +
1955 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1956 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1957 +        final Integer w1 =  fFirst ? v1 : v2;
1958 +        final Integer w2 = !fFirst ? v1 : v2;
1959 +
1960 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
1961 +        assertTrue(fst.complete(w1));
1962 +        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
1963 +        checkIncomplete(h1);
1964 +        checkIncomplete(h2);
1965 +        r1.assertNotInvoked();
1966 +        r2.assertNotInvoked();
1967 +        assertTrue(snd.complete(w2));
1968 +        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
1969 +
1970 +        checkCompletedNormally(h1, null);
1971 +        checkCompletedNormally(h2, null);
1972 +        checkCompletedNormally(h3, null);
1973 +        r1.assertInvoked();
1974 +        r2.assertInvoked();
1975 +        r3.assertInvoked();
1976 +        checkCompletedNormally(f, v1);
1977 +        checkCompletedNormally(g, v2);
1978 +    }}
1979 +
1980 +    /**
1981 +     * runAfterBoth result completes exceptionally after exceptional
1982 +     * completion of either source
1983 +     */
1984 +    public void testRunAfterBoth_exceptionalCompletion() throws Throwable {
1985 +        for (ExecutionMode m : ExecutionMode.values())
1986 +        for (boolean fFirst : new boolean[] { true, false })
1987 +        for (boolean failFirst : new boolean[] { true, false })
1988 +        for (Integer v1 : new Integer[] { 1, null })
1989 +    {
1990 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1991 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1992 +        final CFException ex = new CFException();
1993 +        final Noop r1 = new Noop(m);
1994 +        final Noop r2 = new Noop(m);
1995 +        final Noop r3 = new Noop(m);
1996 +
1997 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1998 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1999 +        final Callable<Boolean> complete1 = failFirst ?
2000 +            () -> fst.completeExceptionally(ex) :
2001 +            () -> fst.complete(v1);
2002 +        final Callable<Boolean> complete2 = failFirst ?
2003 +            () -> snd.complete(v1) :
2004 +            () -> snd.completeExceptionally(ex);
2005 +
2006 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2007 +        assertTrue(complete1.call());
2008 +        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2009 +        checkIncomplete(h1);
2010 +        checkIncomplete(h2);
2011 +        assertTrue(complete2.call());
2012 +        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2013 +
2014 +        checkCompletedWithWrappedException(h1, ex);
2015 +        checkCompletedWithWrappedException(h2, ex);
2016 +        checkCompletedWithWrappedException(h3, ex);
2017 +        r1.assertNotInvoked();
2018 +        r2.assertNotInvoked();
2019 +        r3.assertNotInvoked();
2020 +        checkCompletedNormally(failFirst ? snd : fst, v1);
2021 +        checkCompletedExceptionally(failFirst ? fst : snd, ex);
2022 +    }}
2023 +
2024 +    /**
2025 +     * runAfterBoth result completes exceptionally if either source cancelled
2026 +     */
2027 +    public void testRunAfterBoth_sourceCancelled() throws Throwable {
2028 +        for (ExecutionMode m : ExecutionMode.values())
2029 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2030 +        for (boolean fFirst : new boolean[] { true, false })
2031 +        for (boolean failFirst : new boolean[] { true, false })
2032 +        for (Integer v1 : new Integer[] { 1, null })
2033 +    {
2034 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2035 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2036 +        final Noop r1 = new Noop(m);
2037 +        final Noop r2 = new Noop(m);
2038 +        final Noop r3 = new Noop(m);
2039 +
2040 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2041 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2042 +        final Callable<Boolean> complete1 = failFirst ?
2043 +            () -> fst.cancel(mayInterruptIfRunning) :
2044 +            () -> fst.complete(v1);
2045 +        final Callable<Boolean> complete2 = failFirst ?
2046 +            () -> snd.complete(v1) :
2047 +            () -> snd.cancel(mayInterruptIfRunning);
2048 +
2049 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2050 +        assertTrue(complete1.call());
2051 +        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2052 +        checkIncomplete(h1);
2053 +        checkIncomplete(h2);
2054 +        assertTrue(complete2.call());
2055 +        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2056 +
2057 +        checkCompletedWithWrappedCancellationException(h1);
2058 +        checkCompletedWithWrappedCancellationException(h2);
2059 +        checkCompletedWithWrappedCancellationException(h3);
2060 +        r1.assertNotInvoked();
2061 +        r2.assertNotInvoked();
2062 +        r3.assertNotInvoked();
2063 +        checkCompletedNormally(failFirst ? snd : fst, v1);
2064 +        checkCancelled(failFirst ? fst : snd);
2065 +    }}
2066 +
2067 +    /**
2068 +     * runAfterBoth result completes exceptionally if action does
2069 +     */
2070 +    public void testRunAfterBoth_actionFailed() {
2071 +        for (ExecutionMode m : ExecutionMode.values())
2072 +        for (boolean fFirst : new boolean[] { true, false })
2073 +        for (Integer v1 : new Integer[] { 1, null })
2074 +        for (Integer v2 : new Integer[] { 2, null })
2075 +    {
2076 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2077 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2078 +        final FailingRunnable r1 = new FailingRunnable(m);
2079 +        final FailingRunnable r2 = new FailingRunnable(m);
2080 +        final FailingRunnable r3 = new FailingRunnable(m);
2081 +
2082 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2083 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2084 +        final Integer w1 =  fFirst ? v1 : v2;
2085 +        final Integer w2 = !fFirst ? v1 : v2;
2086 +
2087 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2088 +        assertTrue(fst.complete(w1));
2089 +        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2090 +        assertTrue(snd.complete(w2));
2091 +        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2092 +
2093 +        checkCompletedWithWrappedCFException(h1);
2094 +        checkCompletedWithWrappedCFException(h2);
2095 +        checkCompletedWithWrappedCFException(h3);
2096 +        r1.assertInvoked();
2097 +        r2.assertInvoked();
2098 +        r3.assertInvoked();
2099 +        checkCompletedNormally(f, v1);
2100 +        checkCompletedNormally(g, v2);
2101 +    }}
2102 +
2103 +    /**
2104 +     * applyToEither result completes normally after normal completion
2105 +     * of either source
2106 +     */
2107 +    public void testApplyToEither_normalCompletion() {
2108 +        for (ExecutionMode m : ExecutionMode.values())
2109 +        for (Integer v1 : new Integer[] { 1, null })
2110 +        for (Integer v2 : new Integer[] { 2, null })
2111 +    {
2112 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2113 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2114 +        final IncFunction[] rs = new IncFunction[6];
2115 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2116 +
2117 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2118 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2119 +        checkIncomplete(h0);
2120 +        checkIncomplete(h1);
2121 +        rs[0].assertNotInvoked();
2122 +        rs[1].assertNotInvoked();
2123 +        f.complete(v1);
2124 +        checkCompletedNormally(h0, inc(v1));
2125 +        checkCompletedNormally(h1, inc(v1));
2126 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2127 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2128 +        checkCompletedNormally(h2, inc(v1));
2129 +        checkCompletedNormally(h3, inc(v1));
2130 +        g.complete(v2);
2131 +
2132 +        // unspecified behavior - both source completions available
2133 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2134 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2135 +        rs[4].assertValue(h4.join());
2136 +        rs[5].assertValue(h5.join());
2137 +        assertTrue(Objects.equals(inc(v1), h4.join()) ||
2138 +                   Objects.equals(inc(v2), h4.join()));
2139 +        assertTrue(Objects.equals(inc(v1), h5.join()) ||
2140 +                   Objects.equals(inc(v2), h5.join()));
2141 +
2142 +        checkCompletedNormally(f, v1);
2143 +        checkCompletedNormally(g, v2);
2144 +        checkCompletedNormally(h0, inc(v1));
2145 +        checkCompletedNormally(h1, inc(v1));
2146 +        checkCompletedNormally(h2, inc(v1));
2147 +        checkCompletedNormally(h3, inc(v1));
2148 +        for (int i = 0; i < 4; i++) rs[i].assertValue(inc(v1));
2149 +    }}
2150 +
2151 +    /**
2152 +     * applyToEither result completes exceptionally after exceptional
2153 +     * completion of either source
2154 +     */
2155 +    public void testApplyToEither_exceptionalCompletion() {
2156 +        for (ExecutionMode m : ExecutionMode.values())
2157 +        for (Integer v1 : new Integer[] { 1, null })
2158 +    {
2159 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2160 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2161 +        final CFException ex = new CFException();
2162 +        final IncFunction[] rs = new IncFunction[6];
2163 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2164 +
2165 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2166 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2167 +        checkIncomplete(h0);
2168 +        checkIncomplete(h1);
2169 +        rs[0].assertNotInvoked();
2170 +        rs[1].assertNotInvoked();
2171 +        f.completeExceptionally(ex);
2172 +        checkCompletedWithWrappedException(h0, ex);
2173 +        checkCompletedWithWrappedException(h1, ex);
2174 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2175 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2176 +        checkCompletedWithWrappedException(h2, ex);
2177 +        checkCompletedWithWrappedException(h3, ex);
2178 +        g.complete(v1);
2179 +
2180 +        // unspecified behavior - both source completions available
2181 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2182 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2183 +        try {
2184 +            assertEquals(inc(v1), h4.join());
2185 +            rs[4].assertValue(inc(v1));
2186 +        } catch (CompletionException ok) {
2187 +            checkCompletedWithWrappedException(h4, ex);
2188 +            rs[4].assertNotInvoked();
2189 +        }
2190 +        try {
2191 +            assertEquals(inc(v1), h5.join());
2192 +            rs[5].assertValue(inc(v1));
2193 +        } catch (CompletionException ok) {
2194 +            checkCompletedWithWrappedException(h5, ex);
2195 +            rs[5].assertNotInvoked();
2196 +        }
2197 +
2198 +        checkCompletedExceptionally(f, ex);
2199 +        checkCompletedNormally(g, v1);
2200 +        checkCompletedWithWrappedException(h0, ex);
2201 +        checkCompletedWithWrappedException(h1, ex);
2202 +        checkCompletedWithWrappedException(h2, ex);
2203 +        checkCompletedWithWrappedException(h3, ex);
2204 +        checkCompletedWithWrappedException(h4, ex);
2205 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2206 +    }}
2207 +
2208 +    public void testApplyToEither_exceptionalCompletion2() {
2209 +        for (ExecutionMode m : ExecutionMode.values())
2210 +        for (boolean fFirst : new boolean[] { true, false })
2211 +        for (Integer v1 : new Integer[] { 1, null })
2212 +    {
2213 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2214 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2215 +        final CFException ex = new CFException();
2216 +        final IncFunction[] rs = new IncFunction[6];
2217 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2218 +
2219 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2220 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2221 +        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2222 +        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2223 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2224 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2225 +
2226 +        // unspecified behavior - both source completions available
2227 +        try {
2228 +            assertEquals(inc(v1), h0.join());
2229 +            rs[0].assertValue(inc(v1));
2230 +        } catch (CompletionException ok) {
2231 +            checkCompletedWithWrappedException(h0, ex);
2232 +            rs[0].assertNotInvoked();
2233 +        }
2234 +        try {
2235 +            assertEquals(inc(v1), h1.join());
2236 +            rs[1].assertValue(inc(v1));
2237 +        } catch (CompletionException ok) {
2238 +            checkCompletedWithWrappedException(h1, ex);
2239 +            rs[1].assertNotInvoked();
2240 +        }
2241 +        try {
2242 +            assertEquals(inc(v1), h2.join());
2243 +            rs[2].assertValue(inc(v1));
2244 +        } catch (CompletionException ok) {
2245 +            checkCompletedWithWrappedException(h2, ex);
2246 +            rs[2].assertNotInvoked();
2247 +        }
2248 +        try {
2249 +            assertEquals(inc(v1), h3.join());
2250 +            rs[3].assertValue(inc(v1));
2251 +        } catch (CompletionException ok) {
2252 +            checkCompletedWithWrappedException(h3, ex);
2253 +            rs[3].assertNotInvoked();
2254 +        }
2255 +
2256 +        checkCompletedNormally(f, v1);
2257 +        checkCompletedExceptionally(g, ex);
2258 +    }}
2259 +
2260 +    /**
2261 +     * applyToEither result completes exceptionally if either source cancelled
2262 +     */
2263 +    public void testApplyToEither_sourceCancelled() {
2264 +        for (ExecutionMode m : ExecutionMode.values())
2265 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2266 +        for (Integer v1 : new Integer[] { 1, null })
2267 +    {
2268 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2269 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2270 +        final IncFunction[] rs = new IncFunction[6];
2271 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2272 +
2273 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2274 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2275 +        checkIncomplete(h0);
2276 +        checkIncomplete(h1);
2277 +        rs[0].assertNotInvoked();
2278 +        rs[1].assertNotInvoked();
2279 +        f.cancel(mayInterruptIfRunning);
2280 +        checkCompletedWithWrappedCancellationException(h0);
2281 +        checkCompletedWithWrappedCancellationException(h1);
2282 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2283 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2284 +        checkCompletedWithWrappedCancellationException(h2);
2285 +        checkCompletedWithWrappedCancellationException(h3);
2286 +        g.complete(v1);
2287 +
2288 +        // unspecified behavior - both source completions available
2289 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2290 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2291 +        try {
2292 +            assertEquals(inc(v1), h4.join());
2293 +            rs[4].assertValue(inc(v1));
2294 +        } catch (CompletionException ok) {
2295 +            checkCompletedWithWrappedCancellationException(h4);
2296 +            rs[4].assertNotInvoked();
2297 +        }
2298 +        try {
2299 +            assertEquals(inc(v1), h5.join());
2300 +            rs[5].assertValue(inc(v1));
2301 +        } catch (CompletionException ok) {
2302 +            checkCompletedWithWrappedCancellationException(h5);
2303 +            rs[5].assertNotInvoked();
2304 +        }
2305 +
2306 +        checkCancelled(f);
2307 +        checkCompletedNormally(g, v1);
2308 +        checkCompletedWithWrappedCancellationException(h0);
2309 +        checkCompletedWithWrappedCancellationException(h1);
2310 +        checkCompletedWithWrappedCancellationException(h2);
2311 +        checkCompletedWithWrappedCancellationException(h3);
2312 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2313 +    }}
2314 +
2315 +    public void testApplyToEither_sourceCancelled2() {
2316 +        for (ExecutionMode m : ExecutionMode.values())
2317 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2318 +        for (boolean fFirst : new boolean[] { true, false })
2319 +        for (Integer v1 : new Integer[] { 1, null })
2320 +    {
2321 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2322 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2323 +        final IncFunction[] rs = new IncFunction[6];
2324 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2325 +
2326 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2327 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2328 +        assertTrue(fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2329 +        assertTrue(!fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2330 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2331 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2332 +
2333 +        // unspecified behavior - both source completions available
2334 +        try {
2335 +            assertEquals(inc(v1), h0.join());
2336 +            rs[0].assertValue(inc(v1));
2337 +        } catch (CompletionException ok) {
2338 +            checkCompletedWithWrappedCancellationException(h0);
2339 +            rs[0].assertNotInvoked();
2340 +        }
2341 +        try {
2342 +            assertEquals(inc(v1), h1.join());
2343 +            rs[1].assertValue(inc(v1));
2344 +        } catch (CompletionException ok) {
2345 +            checkCompletedWithWrappedCancellationException(h1);
2346 +            rs[1].assertNotInvoked();
2347 +        }
2348 +        try {
2349 +            assertEquals(inc(v1), h2.join());
2350 +            rs[2].assertValue(inc(v1));
2351 +        } catch (CompletionException ok) {
2352 +            checkCompletedWithWrappedCancellationException(h2);
2353 +            rs[2].assertNotInvoked();
2354 +        }
2355 +        try {
2356 +            assertEquals(inc(v1), h3.join());
2357 +            rs[3].assertValue(inc(v1));
2358 +        } catch (CompletionException ok) {
2359 +            checkCompletedWithWrappedCancellationException(h3);
2360 +            rs[3].assertNotInvoked();
2361 +        }
2362 +
2363 +        checkCompletedNormally(f, v1);
2364 +        checkCancelled(g);
2365 +    }}
2366 +
2367 +    /**
2368 +     * applyToEither result completes exceptionally if action does
2369 +     */
2370 +    public void testApplyToEither_actionFailed() {
2371 +        for (ExecutionMode m : ExecutionMode.values())
2372 +        for (Integer v1 : new Integer[] { 1, null })
2373 +        for (Integer v2 : new Integer[] { 2, null })
2374 +    {
2375 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2376 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2377 +        final FailingFunction[] rs = new FailingFunction[6];
2378 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
2379 +
2380 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2381 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2382 +        f.complete(v1);
2383 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2384 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2385 +        checkCompletedWithWrappedCFException(h0);
2386 +        checkCompletedWithWrappedCFException(h1);
2387 +        checkCompletedWithWrappedCFException(h2);
2388 +        checkCompletedWithWrappedCFException(h3);
2389 +        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2390 +
2391 +        g.complete(v2);
2392 +
2393 +        // unspecified behavior - both source completions available
2394 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2395 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2396 +
2397 +        checkCompletedWithWrappedCFException(h4);
2398 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2399 +                   Objects.equals(v2, rs[4].value));
2400 +        checkCompletedWithWrappedCFException(h5);
2401 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2402 +                   Objects.equals(v2, rs[5].value));
2403 +
2404 +        checkCompletedNormally(f, v1);
2405 +        checkCompletedNormally(g, v2);
2406 +    }}
2407 +
2408 +    /**
2409 +     * acceptEither result completes normally after normal completion
2410 +     * of either source
2411 +     */
2412 +    public void testAcceptEither_normalCompletion() {
2413 +        for (ExecutionMode m : ExecutionMode.values())
2414 +        for (Integer v1 : new Integer[] { 1, null })
2415 +        for (Integer v2 : new Integer[] { 2, null })
2416 +    {
2417 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2418 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2419 +        final NoopConsumer[] rs = new NoopConsumer[6];
2420 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2421 +
2422 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2423 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2424 +        checkIncomplete(h0);
2425 +        checkIncomplete(h1);
2426 +        rs[0].assertNotInvoked();
2427 +        rs[1].assertNotInvoked();
2428 +        f.complete(v1);
2429 +        checkCompletedNormally(h0, null);
2430 +        checkCompletedNormally(h1, null);
2431 +        rs[0].assertValue(v1);
2432 +        rs[1].assertValue(v1);
2433 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2434 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2435 +        checkCompletedNormally(h2, null);
2436 +        checkCompletedNormally(h3, null);
2437 +        rs[2].assertValue(v1);
2438 +        rs[3].assertValue(v1);
2439 +        g.complete(v2);
2440 +
2441 +        // unspecified behavior - both source completions available
2442 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2443 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2444 +        checkCompletedNormally(h4, null);
2445 +        checkCompletedNormally(h5, null);
2446 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2447 +                   Objects.equals(v2, rs[4].value));
2448 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2449 +                   Objects.equals(v2, rs[5].value));
2450 +
2451 +        checkCompletedNormally(f, v1);
2452 +        checkCompletedNormally(g, v2);
2453 +        checkCompletedNormally(h0, null);
2454 +        checkCompletedNormally(h1, null);
2455 +        checkCompletedNormally(h2, null);
2456 +        checkCompletedNormally(h3, null);
2457 +        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2458 +    }}
2459 +
2460 +    /**
2461 +     * acceptEither result completes exceptionally after exceptional
2462 +     * completion of either source
2463 +     */
2464 +    public void testAcceptEither_exceptionalCompletion() {
2465 +        for (ExecutionMode m : ExecutionMode.values())
2466 +        for (Integer v1 : new Integer[] { 1, null })
2467 +    {
2468 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2469 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2470 +        final CFException ex = new CFException();
2471 +        final NoopConsumer[] rs = new NoopConsumer[6];
2472 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2473 +
2474 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2475 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2476 +        checkIncomplete(h0);
2477 +        checkIncomplete(h1);
2478 +        rs[0].assertNotInvoked();
2479 +        rs[1].assertNotInvoked();
2480 +        f.completeExceptionally(ex);
2481 +        checkCompletedWithWrappedException(h0, ex);
2482 +        checkCompletedWithWrappedException(h1, ex);
2483 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2484 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2485 +        checkCompletedWithWrappedException(h2, ex);
2486 +        checkCompletedWithWrappedException(h3, ex);
2487 +
2488 +        g.complete(v1);
2489 +
2490 +        // unspecified behavior - both source completions available
2491 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2492 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2493 +        try {
2494 +            assertNull(h4.join());
2495 +            rs[4].assertValue(v1);
2496 +        } catch (CompletionException ok) {
2497 +            checkCompletedWithWrappedException(h4, ex);
2498 +            rs[4].assertNotInvoked();
2499 +        }
2500 +        try {
2501 +            assertNull(h5.join());
2502 +            rs[5].assertValue(v1);
2503 +        } catch (CompletionException ok) {
2504 +            checkCompletedWithWrappedException(h5, ex);
2505 +            rs[5].assertNotInvoked();
2506 +        }
2507 +
2508 +        checkCompletedExceptionally(f, ex);
2509 +        checkCompletedNormally(g, v1);
2510 +        checkCompletedWithWrappedException(h0, ex);
2511 +        checkCompletedWithWrappedException(h1, ex);
2512 +        checkCompletedWithWrappedException(h2, ex);
2513 +        checkCompletedWithWrappedException(h3, ex);
2514 +        checkCompletedWithWrappedException(h4, ex);
2515 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2516 +    }}
2517 +
2518 +    public void testAcceptEither_exceptionalCompletion2() {
2519 +        for (ExecutionMode m : ExecutionMode.values())
2520 +        for (boolean fFirst : new boolean[] { true, false })
2521 +        for (Integer v1 : new Integer[] { 1, null })
2522 +    {
2523 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2524 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2525 +        final CFException ex = new CFException();
2526 +        final NoopConsumer[] rs = new NoopConsumer[6];
2527 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2528 +
2529 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2530 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2531 +        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2532 +        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2533 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2534 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2535 +
2536 +        // unspecified behavior - both source completions available
2537 +        try {
2538 +            assertEquals(null, h0.join());
2539 +            rs[0].assertValue(v1);
2540 +        } catch (CompletionException ok) {
2541 +            checkCompletedWithWrappedException(h0, ex);
2542 +            rs[0].assertNotInvoked();
2543 +        }
2544 +        try {
2545 +            assertEquals(null, h1.join());
2546 +            rs[1].assertValue(v1);
2547 +        } catch (CompletionException ok) {
2548 +            checkCompletedWithWrappedException(h1, ex);
2549 +            rs[1].assertNotInvoked();
2550 +        }
2551 +        try {
2552 +            assertEquals(null, h2.join());
2553 +            rs[2].assertValue(v1);
2554 +        } catch (CompletionException ok) {
2555 +            checkCompletedWithWrappedException(h2, ex);
2556 +            rs[2].assertNotInvoked();
2557 +        }
2558 +        try {
2559 +            assertEquals(null, h3.join());
2560 +            rs[3].assertValue(v1);
2561 +        } catch (CompletionException ok) {
2562 +            checkCompletedWithWrappedException(h3, ex);
2563 +            rs[3].assertNotInvoked();
2564 +        }
2565 +
2566 +        checkCompletedNormally(f, v1);
2567 +        checkCompletedExceptionally(g, ex);
2568 +    }}
2569 +
2570 +    /**
2571 +     * acceptEither result completes exceptionally if either source cancelled
2572 +     */
2573 +    public void testAcceptEither_sourceCancelled() {
2574 +        for (ExecutionMode m : ExecutionMode.values())
2575 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2576 +        for (Integer v1 : new Integer[] { 1, null })
2577 +    {
2578 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2579 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2580 +        final NoopConsumer[] rs = new NoopConsumer[6];
2581 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2582 +
2583 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2584 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2585 +        checkIncomplete(h0);
2586 +        checkIncomplete(h1);
2587 +        rs[0].assertNotInvoked();
2588 +        rs[1].assertNotInvoked();
2589 +        f.cancel(mayInterruptIfRunning);
2590 +        checkCompletedWithWrappedCancellationException(h0);
2591 +        checkCompletedWithWrappedCancellationException(h1);
2592 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2593 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2594 +        checkCompletedWithWrappedCancellationException(h2);
2595 +        checkCompletedWithWrappedCancellationException(h3);
2596 +
2597 +        g.complete(v1);
2598 +
2599 +        // unspecified behavior - both source completions available
2600 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2601 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2602 +        try {
2603 +            assertNull(h4.join());
2604 +            rs[4].assertValue(v1);
2605 +        } catch (CompletionException ok) {
2606 +            checkCompletedWithWrappedCancellationException(h4);
2607 +            rs[4].assertNotInvoked();
2608 +        }
2609 +        try {
2610 +            assertNull(h5.join());
2611 +            rs[5].assertValue(v1);
2612 +        } catch (CompletionException ok) {
2613 +            checkCompletedWithWrappedCancellationException(h5);
2614 +            rs[5].assertNotInvoked();
2615 +        }
2616 +
2617 +        checkCancelled(f);
2618 +        checkCompletedNormally(g, v1);
2619 +        checkCompletedWithWrappedCancellationException(h0);
2620 +        checkCompletedWithWrappedCancellationException(h1);
2621 +        checkCompletedWithWrappedCancellationException(h2);
2622 +        checkCompletedWithWrappedCancellationException(h3);
2623 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2624 +    }}
2625 +
2626 +    /**
2627 +     * acceptEither result completes exceptionally if action does
2628 +     */
2629 +    public void testAcceptEither_actionFailed() {
2630 +        for (ExecutionMode m : ExecutionMode.values())
2631 +        for (Integer v1 : new Integer[] { 1, null })
2632 +        for (Integer v2 : new Integer[] { 2, null })
2633 +    {
2634 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2635 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2636 +        final FailingConsumer[] rs = new FailingConsumer[6];
2637 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
2638 +
2639 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2640 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2641 +        f.complete(v1);
2642 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2643 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2644 +        checkCompletedWithWrappedCFException(h0);
2645 +        checkCompletedWithWrappedCFException(h1);
2646 +        checkCompletedWithWrappedCFException(h2);
2647 +        checkCompletedWithWrappedCFException(h3);
2648 +        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2649 +
2650 +        g.complete(v2);
2651 +
2652 +        // unspecified behavior - both source completions available
2653 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2654 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2655 +
2656 +        checkCompletedWithWrappedCFException(h4);
2657 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2658 +                   Objects.equals(v2, rs[4].value));
2659 +        checkCompletedWithWrappedCFException(h5);
2660 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2661 +                   Objects.equals(v2, rs[5].value));
2662 +
2663 +        checkCompletedNormally(f, v1);
2664 +        checkCompletedNormally(g, v2);
2665 +    }}
2666 +
2667 +    /**
2668 +     * runAfterEither result completes normally after normal completion
2669 +     * of either source
2670 +     */
2671 +    public void testRunAfterEither_normalCompletion() {
2672 +        for (ExecutionMode m : ExecutionMode.values())
2673 +        for (Integer v1 : new Integer[] { 1, null })
2674 +        for (Integer v2 : new Integer[] { 2, null })
2675 +    {
2676 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2677 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2678 +        final Noop[] rs = new Noop[6];
2679 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2680 +
2681 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2682 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2683 +        checkIncomplete(h0);
2684 +        checkIncomplete(h1);
2685 +        rs[0].assertNotInvoked();
2686 +        rs[1].assertNotInvoked();
2687 +        f.complete(v1);
2688 +        checkCompletedNormally(h0, null);
2689 +        checkCompletedNormally(h1, null);
2690 +        rs[0].assertInvoked();
2691 +        rs[1].assertInvoked();
2692 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2693 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2694 +        checkCompletedNormally(h2, null);
2695 +        checkCompletedNormally(h3, null);
2696 +        rs[2].assertInvoked();
2697 +        rs[3].assertInvoked();
2698 +
2699 +        g.complete(v2);
2700 +
2701 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2702 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2703 +
2704 +        checkCompletedNormally(f, v1);
2705 +        checkCompletedNormally(g, v2);
2706 +        checkCompletedNormally(h0, null);
2707 +        checkCompletedNormally(h1, null);
2708 +        checkCompletedNormally(h2, null);
2709 +        checkCompletedNormally(h3, null);
2710 +        checkCompletedNormally(h4, null);
2711 +        checkCompletedNormally(h5, null);
2712 +        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2713 +    }}
2714 +
2715 +    /**
2716 +     * runAfterEither result completes exceptionally after exceptional
2717 +     * completion of either source
2718 +     */
2719 +    public void testRunAfterEither_exceptionalCompletion() {
2720 +        for (ExecutionMode m : ExecutionMode.values())
2721 +        for (Integer v1 : new Integer[] { 1, null })
2722 +    {
2723 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2724 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2725 +        final CFException ex = new CFException();
2726 +        final Noop[] rs = new Noop[6];
2727 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2728 +
2729 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2730 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2731 +        checkIncomplete(h0);
2732 +        checkIncomplete(h1);
2733 +        rs[0].assertNotInvoked();
2734 +        rs[1].assertNotInvoked();
2735 +        assertTrue(f.completeExceptionally(ex));
2736 +        checkCompletedWithWrappedException(h0, ex);
2737 +        checkCompletedWithWrappedException(h1, ex);
2738 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2739 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2740 +        checkCompletedWithWrappedException(h2, ex);
2741 +        checkCompletedWithWrappedException(h3, ex);
2742 +
2743 +        assertTrue(g.complete(v1));
2744 +
2745 +        // unspecified behavior - both source completions available
2746 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2747 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2748 +        try {
2749 +            assertNull(h4.join());
2750 +            rs[4].assertInvoked();
2751 +        } catch (CompletionException ok) {
2752 +            checkCompletedWithWrappedException(h4, ex);
2753 +            rs[4].assertNotInvoked();
2754 +        }
2755 +        try {
2756 +            assertNull(h5.join());
2757 +            rs[5].assertInvoked();
2758 +        } catch (CompletionException ok) {
2759 +            checkCompletedWithWrappedException(h5, ex);
2760 +            rs[5].assertNotInvoked();
2761 +        }
2762 +
2763 +        checkCompletedExceptionally(f, ex);
2764 +        checkCompletedNormally(g, v1);
2765 +        checkCompletedWithWrappedException(h0, ex);
2766 +        checkCompletedWithWrappedException(h1, ex);
2767 +        checkCompletedWithWrappedException(h2, ex);
2768 +        checkCompletedWithWrappedException(h3, ex);
2769 +        checkCompletedWithWrappedException(h4, ex);
2770 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2771 +    }}
2772 +
2773 +    public void testRunAfterEither_exceptionalCompletion2() {
2774 +        for (ExecutionMode m : ExecutionMode.values())
2775 +        for (boolean fFirst : new boolean[] { true, false })
2776 +        for (Integer v1 : new Integer[] { 1, null })
2777 +    {
2778 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2779 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2780 +        final CFException ex = new CFException();
2781 +        final Noop[] rs = new Noop[6];
2782 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2783 +
2784 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2785 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2786 +        assertTrue( fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2787 +        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2788 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2789 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2790 +
2791 +        // unspecified behavior - both source completions available
2792 +        try {
2793 +            assertEquals(null, h0.join());
2794 +            rs[0].assertInvoked();
2795 +        } catch (CompletionException ok) {
2796 +            checkCompletedWithWrappedException(h0, ex);
2797 +            rs[0].assertNotInvoked();
2798 +        }
2799 +        try {
2800 +            assertEquals(null, h1.join());
2801 +            rs[1].assertInvoked();
2802 +        } catch (CompletionException ok) {
2803 +            checkCompletedWithWrappedException(h1, ex);
2804 +            rs[1].assertNotInvoked();
2805 +        }
2806 +        try {
2807 +            assertEquals(null, h2.join());
2808 +            rs[2].assertInvoked();
2809 +        } catch (CompletionException ok) {
2810 +            checkCompletedWithWrappedException(h2, ex);
2811 +            rs[2].assertNotInvoked();
2812 +        }
2813 +        try {
2814 +            assertEquals(null, h3.join());
2815 +            rs[3].assertInvoked();
2816 +        } catch (CompletionException ok) {
2817 +            checkCompletedWithWrappedException(h3, ex);
2818 +            rs[3].assertNotInvoked();
2819 +        }
2820 +
2821 +        checkCompletedNormally(f, v1);
2822 +        checkCompletedExceptionally(g, ex);
2823 +    }}
2824 +
2825 +    /**
2826 +     * runAfterEither result completes exceptionally if either source cancelled
2827 +     */
2828 +    public void testRunAfterEither_sourceCancelled() {
2829 +        for (ExecutionMode m : ExecutionMode.values())
2830 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2831 +        for (Integer v1 : new Integer[] { 1, null })
2832 +    {
2833 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2834 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2835 +        final Noop[] rs = new Noop[6];
2836 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2837 +
2838 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2839 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2840 +        checkIncomplete(h0);
2841 +        checkIncomplete(h1);
2842 +        rs[0].assertNotInvoked();
2843 +        rs[1].assertNotInvoked();
2844 +        f.cancel(mayInterruptIfRunning);
2845 +        checkCompletedWithWrappedCancellationException(h0);
2846 +        checkCompletedWithWrappedCancellationException(h1);
2847 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2848 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2849 +        checkCompletedWithWrappedCancellationException(h2);
2850 +        checkCompletedWithWrappedCancellationException(h3);
2851 +
2852 +        assertTrue(g.complete(v1));
2853 +
2854 +        // unspecified behavior - both source completions available
2855 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2856 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2857 +        try {
2858 +            assertNull(h4.join());
2859 +            rs[4].assertInvoked();
2860 +        } catch (CompletionException ok) {
2861 +            checkCompletedWithWrappedCancellationException(h4);
2862 +            rs[4].assertNotInvoked();
2863 +        }
2864 +        try {
2865 +            assertNull(h5.join());
2866 +            rs[5].assertInvoked();
2867 +        } catch (CompletionException ok) {
2868 +            checkCompletedWithWrappedCancellationException(h5);
2869 +            rs[5].assertNotInvoked();
2870 +        }
2871 +
2872 +        checkCancelled(f);
2873 +        checkCompletedNormally(g, v1);
2874 +        checkCompletedWithWrappedCancellationException(h0);
2875 +        checkCompletedWithWrappedCancellationException(h1);
2876 +        checkCompletedWithWrappedCancellationException(h2);
2877 +        checkCompletedWithWrappedCancellationException(h3);
2878 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2879 +    }}
2880 +
2881 +    /**
2882 +     * runAfterEither result completes exceptionally if action does
2883 +     */
2884 +    public void testRunAfterEither_actionFailed() {
2885 +        for (ExecutionMode m : ExecutionMode.values())
2886 +        for (Integer v1 : new Integer[] { 1, null })
2887 +        for (Integer v2 : new Integer[] { 2, null })
2888 +    {
2889 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2890 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2891 +        final FailingRunnable[] rs = new FailingRunnable[6];
2892 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
2893 +
2894 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2895 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2896 +        assertTrue(f.complete(v1));
2897 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2898 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2899 +        checkCompletedWithWrappedCFException(h0);
2900 +        checkCompletedWithWrappedCFException(h1);
2901 +        checkCompletedWithWrappedCFException(h2);
2902 +        checkCompletedWithWrappedCFException(h3);
2903 +        for (int i = 0; i < 4; i++) rs[i].assertInvoked();
2904 +        assertTrue(g.complete(v2));
2905 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2906 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2907 +        checkCompletedWithWrappedCFException(h4);
2908 +        checkCompletedWithWrappedCFException(h5);
2909 +
2910 +        checkCompletedNormally(f, v1);
2911 +        checkCompletedNormally(g, v2);
2912 +        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2913 +    }}
2914 +
2915 +    /**
2916 +     * thenCompose result completes normally after normal completion of source
2917 +     */
2918 +    public void testThenCompose_normalCompletion() {
2919 +        for (ExecutionMode m : ExecutionMode.values())
2920 +        for (boolean createIncomplete : new boolean[] { true, false })
2921 +        for (Integer v1 : new Integer[] { 1, null })
2922 +    {
2923 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2924 +        final CompletableFutureInc r = new CompletableFutureInc(m);
2925 +        if (!createIncomplete) assertTrue(f.complete(v1));
2926 +        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2927 +        if (createIncomplete) assertTrue(f.complete(v1));
2928 +
2929 +        checkCompletedNormally(g, inc(v1));
2930 +        checkCompletedNormally(f, v1);
2931 +        r.assertValue(v1);
2932 +    }}
2933 +
2934 +    /**
2935 +     * thenCompose result completes exceptionally after exceptional
2936 +     * completion of source
2937 +     */
2938 +    public void testThenCompose_exceptionalCompletion() {
2939 +        for (ExecutionMode m : ExecutionMode.values())
2940 +        for (boolean createIncomplete : new boolean[] { true, false })
2941 +    {
2942 +        final CFException ex = new CFException();
2943 +        final CompletableFutureInc r = new CompletableFutureInc(m);
2944 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2945 +        if (!createIncomplete) f.completeExceptionally(ex);
2946 +        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2947 +        if (createIncomplete) f.completeExceptionally(ex);
2948 +
2949 +        checkCompletedWithWrappedException(g, ex);
2950 +        checkCompletedExceptionally(f, ex);
2951 +        r.assertNotInvoked();
2952 +    }}
2953 +
2954 +    /**
2955 +     * thenCompose result completes exceptionally if action does
2956 +     */
2957 +    public void testThenCompose_actionFailed() {
2958 +        for (ExecutionMode m : ExecutionMode.values())
2959 +        for (boolean createIncomplete : new boolean[] { true, false })
2960 +        for (Integer v1 : new Integer[] { 1, null })
2961 +    {
2962 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2963 +        final FailingCompletableFutureFunction r
2964 +            = new FailingCompletableFutureFunction(m);
2965 +        if (!createIncomplete) assertTrue(f.complete(v1));
2966 +        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2967 +        if (createIncomplete) assertTrue(f.complete(v1));
2968 +
2969 +        checkCompletedWithWrappedCFException(g);
2970 +        checkCompletedNormally(f, v1);
2971 +    }}
2972 +
2973 +    /**
2974 +     * thenCompose result completes exceptionally if source cancelled
2975 +     */
2976 +    public void testThenCompose_sourceCancelled() {
2977 +        for (ExecutionMode m : ExecutionMode.values())
2978 +        for (boolean createIncomplete : new boolean[] { true, false })
2979 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2980 +    {
2981 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2982 +        final CompletableFutureInc r = new CompletableFutureInc(m);
2983 +        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
2984 +        final CompletableFuture<Integer> g = m.thenCompose(f, r);
2985 +        if (createIncomplete) {
2986 +            checkIncomplete(g);
2987 +            assertTrue(f.cancel(mayInterruptIfRunning));
2988 +        }
2989 +
2990 +        checkCompletedWithWrappedCancellationException(g);
2991 +        checkCancelled(f);
2992 +    }}
2993 +
2994 +    /**
2995 +     * thenCompose result completes exceptionally if the result of the action does
2996 +     */
2997 +    public void testThenCompose_actionReturnsFailingFuture() {
2998 +        for (ExecutionMode m : ExecutionMode.values())
2999 +        for (int order = 0; order < 6; order++)
3000 +        for (Integer v1 : new Integer[] { 1, null })
3001 +    {
3002 +        final CFException ex = new CFException();
3003 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3004 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
3005 +        final CompletableFuture<Integer> h;
3006 +        // Test all permutations of orders
3007 +        switch (order) {
3008 +        case 0:
3009 +            assertTrue(f.complete(v1));
3010 +            assertTrue(g.completeExceptionally(ex));
3011 +            h = m.thenCompose(f, (x -> g));
3012 +            break;
3013 +        case 1:
3014 +            assertTrue(f.complete(v1));
3015 +            h = m.thenCompose(f, (x -> g));
3016 +            assertTrue(g.completeExceptionally(ex));
3017 +            break;
3018 +        case 2:
3019 +            assertTrue(g.completeExceptionally(ex));
3020 +            assertTrue(f.complete(v1));
3021 +            h = m.thenCompose(f, (x -> g));
3022 +            break;
3023 +        case 3:
3024 +            assertTrue(g.completeExceptionally(ex));
3025 +            h = m.thenCompose(f, (x -> g));
3026 +            assertTrue(f.complete(v1));
3027 +            break;
3028 +        case 4:
3029 +            h = m.thenCompose(f, (x -> g));
3030 +            assertTrue(f.complete(v1));
3031 +            assertTrue(g.completeExceptionally(ex));
3032 +            break;
3033 +        case 5:
3034 +            h = m.thenCompose(f, (x -> g));
3035 +            assertTrue(f.complete(v1));
3036 +            assertTrue(g.completeExceptionally(ex));
3037 +            break;
3038 +        default: throw new AssertionError();
3039 +        }
3040 +
3041 +        checkCompletedExceptionally(g, ex);
3042 +        checkCompletedWithWrappedException(h, ex);
3043 +        checkCompletedNormally(f, v1);
3044 +    }}
3045 +
3046 +    // other static methods
3047 +
3048 +    /**
3049 +     * allOf(no component futures) returns a future completed normally
3050 +     * with the value null
3051 +     */
3052 +    public void testAllOf_empty() throws Exception {
3053 +        CompletableFuture<Void> f = CompletableFuture.allOf();
3054 +        checkCompletedNormally(f, null);
3055 +    }
3056 +
3057 +    /**
3058 +     * allOf returns a future completed normally with the value null
3059 +     * when all components complete normally
3060 +     */
3061 +    public void testAllOf_normal() throws Exception {
3062 +        for (int k = 1; k < 10; k++) {
3063 +            CompletableFuture<Integer>[] fs
3064 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3065 +            for (int i = 0; i < k; i++)
3066 +                fs[i] = new CompletableFuture<>();
3067 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3068 +            for (int i = 0; i < k; i++) {
3069 +                checkIncomplete(f);
3070 +                checkIncomplete(CompletableFuture.allOf(fs));
3071 +                fs[i].complete(one);
3072 +            }
3073 +            checkCompletedNormally(f, null);
3074 +            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3075 +        }
3076 +    }
3077 +
3078 +    public void testAllOf_backwards() throws Exception {
3079 +        for (int k = 1; k < 10; k++) {
3080 +            CompletableFuture<Integer>[] fs
3081 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3082 +            for (int i = 0; i < k; i++)
3083 +                fs[i] = new CompletableFuture<>();
3084 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3085 +            for (int i = k - 1; i >= 0; i--) {
3086 +                checkIncomplete(f);
3087 +                checkIncomplete(CompletableFuture.allOf(fs));
3088 +                fs[i].complete(one);
3089 +            }
3090 +            checkCompletedNormally(f, null);
3091 +            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3092 +        }
3093 +    }
3094 +
3095 +    public void testAllOf_exceptional() throws Exception {
3096 +        for (int k = 1; k < 10; k++) {
3097 +            CompletableFuture<Integer>[] fs
3098 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3099 +            CFException ex = new CFException();
3100 +            for (int i = 0; i < k; i++)
3101 +                fs[i] = new CompletableFuture<>();
3102 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3103 +            for (int i = 0; i < k; i++) {
3104 +                checkIncomplete(f);
3105 +                checkIncomplete(CompletableFuture.allOf(fs));
3106 +                if (i != k/2) {
3107 +                    fs[i].complete(i);
3108 +                    checkCompletedNormally(fs[i], i);
3109 +                } else {
3110 +                    fs[i].completeExceptionally(ex);
3111 +                    checkCompletedExceptionally(fs[i], ex);
3112 +                }
3113 +            }
3114 +            checkCompletedWithWrappedException(f, ex);
3115 +            checkCompletedWithWrappedException(CompletableFuture.allOf(fs), ex);
3116 +        }
3117 +    }
3118 +
3119 +    /**
3120 +     * anyOf(no component futures) returns an incomplete future
3121 +     */
3122 +    public void testAnyOf_empty() throws Exception {
3123 +        for (Integer v1 : new Integer[] { 1, null })
3124 +    {
3125 +        CompletableFuture<Object> f = CompletableFuture.anyOf();
3126 +        checkIncomplete(f);
3127 +
3128 +        f.complete(v1);
3129 +        checkCompletedNormally(f, v1);
3130 +    }}
3131 +
3132 +    /**
3133 +     * anyOf returns a future completed normally with a value when
3134 +     * a component future does
3135 +     */
3136 +    public void testAnyOf_normal() throws Exception {
3137 +        for (int k = 0; k < 10; k++) {
3138 +            CompletableFuture[] fs = new CompletableFuture[k];
3139 +            for (int i = 0; i < k; i++)
3140 +                fs[i] = new CompletableFuture<>();
3141 +            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3142 +            checkIncomplete(f);
3143 +            for (int i = 0; i < k; i++) {
3144 +                fs[i].complete(i);
3145 +                checkCompletedNormally(f, 0);
3146 +                int x = (int) CompletableFuture.anyOf(fs).join();
3147 +                assertTrue(0 <= x && x <= i);
3148 +            }
3149 +        }
3150      }
3151 +    public void testAnyOf_normal_backwards() throws Exception {
3152 +        for (int k = 0; k < 10; k++) {
3153 +            CompletableFuture[] fs = new CompletableFuture[k];
3154 +            for (int i = 0; i < k; i++)
3155 +                fs[i] = new CompletableFuture<>();
3156 +            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3157 +            checkIncomplete(f);
3158 +            for (int i = k - 1; i >= 0; i--) {
3159 +                fs[i].complete(i);
3160 +                checkCompletedNormally(f, k - 1);
3161 +                int x = (int) CompletableFuture.anyOf(fs).join();
3162 +                assertTrue(i <= x && x <= k - 1);
3163 +            }
3164 +        }
3165 +    }
3166 +
3167 +    /**
3168 +     * anyOf result completes exceptionally when any component does.
3169 +     */
3170 +    public void testAnyOf_exceptional() throws Exception {
3171 +        for (int k = 0; k < 10; k++) {
3172 +            CompletableFuture[] fs = new CompletableFuture[k];
3173 +            CFException[] exs = new CFException[k];
3174 +            for (int i = 0; i < k; i++) {
3175 +                fs[i] = new CompletableFuture<>();
3176 +                exs[i] = new CFException();
3177 +            }
3178 +            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3179 +            checkIncomplete(f);
3180 +            for (int i = 0; i < k; i++) {
3181 +                fs[i].completeExceptionally(exs[i]);
3182 +                checkCompletedWithWrappedException(f, exs[0]);
3183 +                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3184 +            }
3185 +        }
3186 +    }
3187 +
3188 +    public void testAnyOf_exceptional_backwards() throws Exception {
3189 +        for (int k = 0; k < 10; k++) {
3190 +            CompletableFuture[] fs = new CompletableFuture[k];
3191 +            CFException[] exs = new CFException[k];
3192 +            for (int i = 0; i < k; i++) {
3193 +                fs[i] = new CompletableFuture<>();
3194 +                exs[i] = new CFException();
3195 +            }
3196 +            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3197 +            checkIncomplete(f);
3198 +            for (int i = k - 1; i >= 0; i--) {
3199 +                fs[i].completeExceptionally(exs[i]);
3200 +                checkCompletedWithWrappedException(f, exs[k - 1]);
3201 +                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3202 +            }
3203 +        }
3204 +    }
3205 +
3206 +    /**
3207 +     * Completion methods throw NullPointerException with null arguments
3208 +     */
3209 +    public void testNPE() {
3210 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3211 +        CompletableFuture<Integer> g = new CompletableFuture<>();
3212 +        CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
3213 +        ThreadExecutor exec = new ThreadExecutor();
3214 +
3215 +        Runnable[] throwingActions = {
3216 +            () -> CompletableFuture.supplyAsync(null),
3217 +            () -> CompletableFuture.supplyAsync(null, exec),
3218 +            () -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.SYNC, 42), null),
3219 +
3220 +            () -> CompletableFuture.runAsync(null),
3221 +            () -> CompletableFuture.runAsync(null, exec),
3222 +            () -> CompletableFuture.runAsync(() -> {}, null),
3223 +
3224 +            () -> f.completeExceptionally(null),
3225 +
3226 +            () -> f.thenApply(null),
3227 +            () -> f.thenApplyAsync(null),
3228 +            () -> f.thenApplyAsync((x) -> x, null),
3229 +            () -> f.thenApplyAsync(null, exec),
3230 +
3231 +            () -> f.thenAccept(null),
3232 +            () -> f.thenAcceptAsync(null),
3233 +            () -> f.thenAcceptAsync((x) -> {} , null),
3234 +            () -> f.thenAcceptAsync(null, exec),
3235 +
3236 +            () -> f.thenRun(null),
3237 +            () -> f.thenRunAsync(null),
3238 +            () -> f.thenRunAsync(() -> {} , null),
3239 +            () -> f.thenRunAsync(null, exec),
3240 +
3241 +            () -> f.thenCombine(g, null),
3242 +            () -> f.thenCombineAsync(g, null),
3243 +            () -> f.thenCombineAsync(g, null, exec),
3244 +            () -> f.thenCombine(nullFuture, (x, y) -> x),
3245 +            () -> f.thenCombineAsync(nullFuture, (x, y) -> x),
3246 +            () -> f.thenCombineAsync(nullFuture, (x, y) -> x, exec),
3247 +            () -> f.thenCombineAsync(g, (x, y) -> x, null),
3248 +
3249 +            () -> f.thenAcceptBoth(g, null),
3250 +            () -> f.thenAcceptBothAsync(g, null),
3251 +            () -> f.thenAcceptBothAsync(g, null, exec),
3252 +            () -> f.thenAcceptBoth(nullFuture, (x, y) -> {}),
3253 +            () -> f.thenAcceptBothAsync(nullFuture, (x, y) -> {}),
3254 +            () -> f.thenAcceptBothAsync(nullFuture, (x, y) -> {}, exec),
3255 +            () -> f.thenAcceptBothAsync(g, (x, y) -> {}, null),
3256 +
3257 +            () -> f.runAfterBoth(g, null),
3258 +            () -> f.runAfterBothAsync(g, null),
3259 +            () -> f.runAfterBothAsync(g, null, exec),
3260 +            () -> f.runAfterBoth(nullFuture, () -> {}),
3261 +            () -> f.runAfterBothAsync(nullFuture, () -> {}),
3262 +            () -> f.runAfterBothAsync(nullFuture, () -> {}, exec),
3263 +            () -> f.runAfterBothAsync(g, () -> {}, null),
3264 +
3265 +            () -> f.applyToEither(g, null),
3266 +            () -> f.applyToEitherAsync(g, null),
3267 +            () -> f.applyToEitherAsync(g, null, exec),
3268 +            () -> f.applyToEither(nullFuture, (x) -> x),
3269 +            () -> f.applyToEitherAsync(nullFuture, (x) -> x),
3270 +            () -> f.applyToEitherAsync(nullFuture, (x) -> x, exec),
3271 +            () -> f.applyToEitherAsync(g, (x) -> x, null),
3272 +
3273 +            () -> f.acceptEither(g, null),
3274 +            () -> f.acceptEitherAsync(g, null),
3275 +            () -> f.acceptEitherAsync(g, null, exec),
3276 +            () -> f.acceptEither(nullFuture, (x) -> {}),
3277 +            () -> f.acceptEitherAsync(nullFuture, (x) -> {}),
3278 +            () -> f.acceptEitherAsync(nullFuture, (x) -> {}, exec),
3279 +            () -> f.acceptEitherAsync(g, (x) -> {}, null),
3280 +
3281 +            () -> f.runAfterEither(g, null),
3282 +            () -> f.runAfterEitherAsync(g, null),
3283 +            () -> f.runAfterEitherAsync(g, null, exec),
3284 +            () -> f.runAfterEither(nullFuture, () -> {}),
3285 +            () -> f.runAfterEitherAsync(nullFuture, () -> {}),
3286 +            () -> f.runAfterEitherAsync(nullFuture, () -> {}, exec),
3287 +            () -> f.runAfterEitherAsync(g, () -> {}, null),
3288 +
3289 +            () -> f.thenCompose(null),
3290 +            () -> f.thenComposeAsync(null),
3291 +            () -> f.thenComposeAsync(new CompletableFutureInc(ExecutionMode.EXECUTOR), null),
3292 +            () -> f.thenComposeAsync(null, exec),
3293 +
3294 +            () -> f.exceptionally(null),
3295 +
3296 +            () -> f.handle(null),
3297 +
3298 +            () -> CompletableFuture.allOf((CompletableFuture<?>)null),
3299 +            () -> CompletableFuture.allOf((CompletableFuture<?>[])null),
3300 +            () -> CompletableFuture.allOf(f, null),
3301 +            () -> CompletableFuture.allOf(null, f),
3302 +
3303 +            () -> CompletableFuture.anyOf((CompletableFuture<?>)null),
3304 +            () -> CompletableFuture.anyOf((CompletableFuture<?>[])null),
3305 +            () -> CompletableFuture.anyOf(f, null),
3306 +            () -> CompletableFuture.anyOf(null, f),
3307 +
3308 +            () -> f.obtrudeException(null),
3309 +        };
3310 +
3311 +        assertThrows(NullPointerException.class, throwingActions);
3312 +        assertEquals(0, exec.count.get());
3313 +    }
3314 +
3315 +    /**
3316 +     * toCompletableFuture returns this CompletableFuture.
3317 +     */
3318 +    public void testToCompletableFuture() {
3319 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3320 +        assertSame(f, f.toCompletableFuture());
3321 +    }
3322 +
3323 +    //--- tests of implementation details; not part of official tck ---
3324 +
3325 +    Object resultOf(CompletableFuture<?> f) {
3326 +        try {
3327 +            java.lang.reflect.Field resultField
3328 +                = CompletableFuture.class.getDeclaredField("result");
3329 +            resultField.setAccessible(true);
3330 +            return resultField.get(f);
3331 +        } catch (Throwable t) { throw new AssertionError(t); }
3332 +    }
3333 +
3334 +    public void testExceptionPropagationReusesResultObject() {
3335 +        if (!testImplementationDetails) return;
3336 +        for (ExecutionMode m : ExecutionMode.values())
3337 +    {
3338 +        final CFException ex = new CFException();
3339 +        final CompletableFuture<Integer> v42 = CompletableFuture.completedFuture(42);
3340 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3341 +
3342 +        List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> funs
3343 +            = new ArrayList<>();
3344 +
3345 +        funs.add((y) -> m.thenRun(y, new Noop(m)));
3346 +        funs.add((y) -> m.thenAccept(y, new NoopConsumer(m)));
3347 +        funs.add((y) -> m.thenApply(y, new IncFunction(m)));
3348 +
3349 +        funs.add((y) -> m.runAfterEither(y, incomplete, new Noop(m)));
3350 +        funs.add((y) -> m.acceptEither(y, incomplete, new NoopConsumer(m)));
3351 +        funs.add((y) -> m.applyToEither(y, incomplete, new IncFunction(m)));
3352 +
3353 +        funs.add((y) -> m.runAfterBoth(y, v42, new Noop(m)));
3354 +        funs.add((y) -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3355 +        funs.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m)));
3356 +
3357 +        funs.add((y) -> m.whenComplete(y, (Integer x, Throwable t) -> {}));
3358 +
3359 +        funs.add((y) -> m.thenCompose(y, new CompletableFutureInc(m)));
3360 +
3361 +        funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y, v42}));
3362 +        funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y, incomplete}));
3363 +
3364 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3365 +                 fun : funs) {
3366 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3367 +            f.completeExceptionally(ex);
3368 +            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3369 +            checkCompletedWithWrappedException(src, ex);
3370 +            CompletableFuture<?> dep = fun.apply(src);
3371 +            checkCompletedWithWrappedException(dep, ex);
3372 +            assertSame(resultOf(src), resultOf(dep));
3373 +        }
3374 +
3375 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3376 +                 fun : funs) {
3377 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3378 +            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3379 +            CompletableFuture<?> dep = fun.apply(src);
3380 +            f.completeExceptionally(ex);
3381 +            checkCompletedWithWrappedException(src, ex);
3382 +            checkCompletedWithWrappedException(dep, ex);
3383 +            assertSame(resultOf(src), resultOf(dep));
3384 +        }
3385 +
3386 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3387 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3388 +                 fun : funs) {
3389 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3390 +            f.cancel(mayInterruptIfRunning);
3391 +            checkCancelled(f);
3392 +            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3393 +            checkCompletedWithWrappedCancellationException(src);
3394 +            CompletableFuture<?> dep = fun.apply(src);
3395 +            checkCompletedWithWrappedCancellationException(dep);
3396 +            assertSame(resultOf(src), resultOf(dep));
3397 +        }
3398 +
3399 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3400 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3401 +                 fun : funs) {
3402 +            CompletableFuture<Integer> f = new CompletableFuture<>();
3403 +            CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3404 +            CompletableFuture<?> dep = fun.apply(src);
3405 +            f.cancel(mayInterruptIfRunning);
3406 +            checkCancelled(f);
3407 +            checkCompletedWithWrappedCancellationException(src);
3408 +            checkCompletedWithWrappedCancellationException(dep);
3409 +            assertSame(resultOf(src), resultOf(dep));
3410 +        }
3411 +    }}
3412 +
3413   }

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