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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 1.211 by jsr166, Mon Sep 24 14:45:19 2018 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 > import static java.util.concurrent.CompletableFuture.completedFuture;
11 > import static java.util.concurrent.CompletableFuture.failedFuture;
12 >
13 > import java.lang.reflect.Method;
14 > import java.lang.reflect.Modifier;
15 >
16 > import java.util.stream.Collectors;
17 > import java.util.stream.Stream;
18 >
19 > import java.util.ArrayList;
20 > import java.util.Arrays;
21 > import java.util.List;
22 > import java.util.Objects;
23 > import java.util.Set;
24   import java.util.concurrent.Callable;
25   import java.util.concurrent.CancellationException;
12 import java.util.concurrent.CountDownLatch;
13 import java.util.concurrent.ExecutionException;
14 import java.util.concurrent.Future;
26   import java.util.concurrent.CompletableFuture;
27 + import java.util.concurrent.CompletionException;
28 + import java.util.concurrent.CompletionStage;
29 + import java.util.concurrent.ExecutionException;
30 + import java.util.concurrent.Executor;
31 + import java.util.concurrent.ForkJoinPool;
32 + import java.util.concurrent.ForkJoinTask;
33 + import java.util.concurrent.RejectedExecutionException;
34   import java.util.concurrent.TimeoutException;
35   import java.util.concurrent.atomic.AtomicInteger;
36 < import static java.util.concurrent.TimeUnit.MILLISECONDS;
37 < import static java.util.concurrent.TimeUnit.SECONDS;
38 < import java.util.*;
36 > import java.util.concurrent.atomic.AtomicReference;
37 > import java.util.function.BiConsumer;
38 > import java.util.function.BiFunction;
39 > import java.util.function.Consumer;
40 > import java.util.function.Function;
41 > import java.util.function.Predicate;
42 > import java.util.function.Supplier;
43 >
44 > import junit.framework.Test;
45 > import junit.framework.TestSuite;
46  
47   public class CompletableFutureTest extends JSR166TestCase {
48  
49      public static void main(String[] args) {
50 <        junit.textui.TestRunner.run(suite());
50 >        main(suite(), args);
51      }
52      public static Test suite() {
53          return new TestSuite(CompletableFutureTest.class);
54      }
55  
56 <    public void testToString() {
57 <        CompletableFuture<String> f;
56 >    static class CFException extends RuntimeException {}
57 >
58 >    void checkIncomplete(CompletableFuture<?> f) {
59 >        assertFalse(f.isDone());
60 >        assertFalse(f.isCancelled());
61 >        assertTrue(f.toString().matches(".*\\[.*Not completed.*\\]"));
62 >
63 >        Object result = null;
64 >        try {
65 >            result = f.getNow(null);
66 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
67 >        assertNull(result);
68 >
69 >        try {
70 >            f.get(randomExpiredTimeout(), randomTimeUnit());
71 >            shouldThrow();
72 >        }
73 >        catch (TimeoutException success) {}
74 >        catch (Throwable fail) { threadUnexpectedException(fail); }
75 >    }
76 >
77 >    <T> void checkCompletedNormally(CompletableFuture<T> f, T expectedValue) {
78 >        checkTimedGet(f, expectedValue);
79 >
80 >        assertEquals(expectedValue, f.join());
81 >        assertEquals(expectedValue, f.getNow(null));
82 >
83 >        T result = null;
84 >        try {
85 >            result = f.get();
86 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
87 >        assertEquals(expectedValue, result);
88 >
89 >        assertTrue(f.isDone());
90 >        assertFalse(f.isCancelled());
91 >        assertFalse(f.isCompletedExceptionally());
92 >        assertTrue(f.toString().matches(".*\\[.*Completed normally.*\\]"));
93 >    }
94 >
95 >    /**
96 >     * Returns the "raw" internal exceptional completion of f,
97 >     * without any additional wrapping with CompletionException.
98 >     */
99 >    Throwable exceptionalCompletion(CompletableFuture<?> f) {
100 >        // handle (and whenComplete and exceptionally) can distinguish
101 >        // between "direct" and "wrapped" exceptional completion
102 >        return f.handle((u, t) -> t).join();
103 >    }
104 >
105 >    void checkCompletedExceptionally(CompletableFuture<?> f,
106 >                                     boolean wrapped,
107 >                                     Consumer<Throwable> checker) {
108 >        Throwable cause = exceptionalCompletion(f);
109 >        if (wrapped) {
110 >            assertTrue(cause instanceof CompletionException);
111 >            cause = cause.getCause();
112 >        }
113 >        checker.accept(cause);
114 >
115 >        long startTime = System.nanoTime();
116 >        try {
117 >            f.get(LONG_DELAY_MS, MILLISECONDS);
118 >            shouldThrow();
119 >        } catch (ExecutionException success) {
120 >            assertSame(cause, success.getCause());
121 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
122 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
123 >
124 >        try {
125 >            f.join();
126 >            shouldThrow();
127 >        } catch (CompletionException success) {
128 >            assertSame(cause, success.getCause());
129 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
130 >
131 >        try {
132 >            f.getNow(null);
133 >            shouldThrow();
134 >        } catch (CompletionException success) {
135 >            assertSame(cause, success.getCause());
136 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
137 >
138 >        try {
139 >            f.get();
140 >            shouldThrow();
141 >        } catch (ExecutionException success) {
142 >            assertSame(cause, success.getCause());
143 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
144 >
145 >        assertFalse(f.isCancelled());
146 >        assertTrue(f.isDone());
147 >        assertTrue(f.isCompletedExceptionally());
148 >        assertTrue(f.toString().matches(".*\\[.*Completed exceptionally.*\\]"));
149 >    }
150 >
151 >    void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
152 >        checkCompletedExceptionally(f, true,
153 >            t -> assertTrue(t instanceof CFException));
154 >    }
155 >
156 >    void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
157 >        checkCompletedExceptionally(f, true,
158 >            t -> assertTrue(t instanceof CancellationException));
159 >    }
160 >
161 >    void checkCompletedWithTimeoutException(CompletableFuture<?> f) {
162 >        checkCompletedExceptionally(f, false,
163 >            t -> assertTrue(t instanceof TimeoutException));
164 >    }
165 >
166 >    void checkCompletedWithWrappedException(CompletableFuture<?> f,
167 >                                            Throwable ex) {
168 >        checkCompletedExceptionally(f, true, t -> assertSame(t, ex));
169 >    }
170 >
171 >    void checkCompletedExceptionally(CompletableFuture<?> f, Throwable ex) {
172 >        checkCompletedExceptionally(f, false, t -> assertSame(t, ex));
173 >    }
174 >
175 >    void checkCancelled(CompletableFuture<?> f) {
176 >        long startTime = System.nanoTime();
177 >        try {
178 >            f.get(LONG_DELAY_MS, MILLISECONDS);
179 >            shouldThrow();
180 >        } catch (CancellationException success) {
181 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
182 >        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
183 >
184 >        try {
185 >            f.join();
186 >            shouldThrow();
187 >        } catch (CancellationException success) {}
188 >        try {
189 >            f.getNow(null);
190 >            shouldThrow();
191 >        } catch (CancellationException success) {}
192 >        try {
193 >            f.get();
194 >            shouldThrow();
195 >        } catch (CancellationException success) {
196 >        } catch (Throwable fail) { threadUnexpectedException(fail); }
197 >
198 >        assertTrue(exceptionalCompletion(f) instanceof CancellationException);
199 >
200 >        assertTrue(f.isDone());
201 >        assertTrue(f.isCompletedExceptionally());
202 >        assertTrue(f.isCancelled());
203 >        assertTrue(f.toString().matches(".*\\[.*Completed exceptionally.*\\]"));
204 >    }
205 >
206 >    /**
207 >     * A newly constructed CompletableFuture is incomplete, as indicated
208 >     * by methods isDone, isCancelled, and getNow
209 >     */
210 >    public void testConstructor() {
211 >        CompletableFuture<Integer> f = new CompletableFuture<>();
212 >        checkIncomplete(f);
213 >    }
214 >
215 >    /**
216 >     * complete completes normally, as indicated by methods isDone,
217 >     * isCancelled, join, get, and getNow
218 >     */
219 >    public void testComplete() {
220 >        for (Integer v1 : new Integer[] { 1, null })
221 >    {
222 >        CompletableFuture<Integer> f = new CompletableFuture<>();
223 >        checkIncomplete(f);
224 >        assertTrue(f.complete(v1));
225 >        assertFalse(f.complete(v1));
226 >        checkCompletedNormally(f, v1);
227 >    }}
228 >
229 >    /**
230 >     * completeExceptionally completes exceptionally, as indicated by
231 >     * methods isDone, isCancelled, join, get, and getNow
232 >     */
233 >    public void testCompleteExceptionally() {
234 >        CompletableFuture<Integer> f = new CompletableFuture<>();
235 >        CFException ex = new CFException();
236 >        checkIncomplete(f);
237 >        f.completeExceptionally(ex);
238 >        checkCompletedExceptionally(f, ex);
239 >    }
240 >
241 >    /**
242 >     * cancel completes exceptionally and reports cancelled, as indicated by
243 >     * methods isDone, isCancelled, join, get, and getNow
244 >     */
245 >    public void testCancel() {
246 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
247 >    {
248 >        CompletableFuture<Integer> f = new CompletableFuture<>();
249 >        checkIncomplete(f);
250 >        assertTrue(f.cancel(mayInterruptIfRunning));
251 >        assertTrue(f.cancel(mayInterruptIfRunning));
252 >        assertTrue(f.cancel(!mayInterruptIfRunning));
253 >        checkCancelled(f);
254 >    }}
255 >
256 >    /**
257 >     * obtrudeValue forces completion with given value
258 >     */
259 >    public void testObtrudeValue() {
260 >        CompletableFuture<Integer> f = new CompletableFuture<>();
261 >        checkIncomplete(f);
262 >        assertTrue(f.complete(one));
263 >        checkCompletedNormally(f, one);
264 >        f.obtrudeValue(three);
265 >        checkCompletedNormally(f, three);
266 >        f.obtrudeValue(two);
267 >        checkCompletedNormally(f, two);
268 >        f = new CompletableFuture<>();
269 >        f.obtrudeValue(three);
270 >        checkCompletedNormally(f, three);
271 >        f.obtrudeValue(null);
272 >        checkCompletedNormally(f, null);
273 >        f = new CompletableFuture<>();
274 >        f.completeExceptionally(new CFException());
275 >        f.obtrudeValue(four);
276 >        checkCompletedNormally(f, four);
277 >    }
278 >
279 >    /**
280 >     * obtrudeException forces completion with given exception
281 >     */
282 >    public void testObtrudeException() {
283 >        for (Integer v1 : new Integer[] { 1, null })
284 >    {
285 >        CFException ex;
286 >        CompletableFuture<Integer> f;
287 >
288 >        f = new CompletableFuture<>();
289 >        assertTrue(f.complete(v1));
290 >        for (int i = 0; i < 2; i++) {
291 >            f.obtrudeException(ex = new CFException());
292 >            checkCompletedExceptionally(f, ex);
293 >        }
294 >
295 >        f = new CompletableFuture<>();
296 >        for (int i = 0; i < 2; i++) {
297 >            f.obtrudeException(ex = new CFException());
298 >            checkCompletedExceptionally(f, ex);
299 >        }
300 >
301 >        f = new CompletableFuture<>();
302 >        f.completeExceptionally(new CFException());
303 >        f.obtrudeValue(v1);
304 >        checkCompletedNormally(f, v1);
305 >        f.obtrudeException(ex = new CFException());
306 >        checkCompletedExceptionally(f, ex);
307 >        f.completeExceptionally(new CFException());
308 >        checkCompletedExceptionally(f, ex);
309 >        assertFalse(f.complete(v1));
310 >        checkCompletedExceptionally(f, ex);
311 >    }}
312 >
313 >    /**
314 >     * getNumberOfDependents returns number of dependent tasks
315 >     */
316 >    public void testGetNumberOfDependents() {
317 >        for (ExecutionMode m : ExecutionMode.values())
318 >        for (Integer v1 : new Integer[] { 1, null })
319 >    {
320 >        CompletableFuture<Integer> f = new CompletableFuture<>();
321 >        assertEquals(0, f.getNumberOfDependents());
322 >        final CompletableFuture<Void> g = m.thenRun(f, new Noop(m));
323 >        assertEquals(1, f.getNumberOfDependents());
324 >        assertEquals(0, g.getNumberOfDependents());
325 >        final CompletableFuture<Void> h = m.thenRun(f, new Noop(m));
326 >        assertEquals(2, f.getNumberOfDependents());
327 >        assertEquals(0, h.getNumberOfDependents());
328 >        assertTrue(f.complete(v1));
329 >        checkCompletedNormally(g, null);
330 >        checkCompletedNormally(h, null);
331 >        assertEquals(0, f.getNumberOfDependents());
332 >        assertEquals(0, g.getNumberOfDependents());
333 >        assertEquals(0, h.getNumberOfDependents());
334 >    }}
335 >
336 >    /**
337 >     * toString indicates current completion state
338 >     */
339 >    public void testToString_incomplete() {
340 >        CompletableFuture<String> f = new CompletableFuture<>();
341 >        assertTrue(f.toString().matches(".*\\[.*Not completed.*\\]"));
342 >        if (testImplementationDetails)
343 >            assertEquals(identityString(f) + "[Not completed]",
344 >                         f.toString());
345 >    }
346 >
347 >    public void testToString_normal() {
348 >        CompletableFuture<String> f = new CompletableFuture<>();
349 >        assertTrue(f.complete("foo"));
350 >        assertTrue(f.toString().matches(".*\\[.*Completed normally.*\\]"));
351 >        if (testImplementationDetails)
352 >            assertEquals(identityString(f) + "[Completed normally]",
353 >                         f.toString());
354 >    }
355 >
356 >    public void testToString_exception() {
357 >        CompletableFuture<String> f = new CompletableFuture<>();
358 >        assertTrue(f.completeExceptionally(new IndexOutOfBoundsException()));
359 >        assertTrue(f.toString().matches(".*\\[.*Completed exceptionally.*\\]"));
360 >        if (testImplementationDetails)
361 >            assertTrue(f.toString().startsWith(
362 >                               identityString(f) + "[Completed exceptionally: "));
363 >    }
364 >
365 >    public void testToString_cancelled() {
366 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
367 >            CompletableFuture<String> f = new CompletableFuture<>();
368 >            assertTrue(f.cancel(mayInterruptIfRunning));
369 >            assertTrue(f.toString().matches(".*\\[.*Completed exceptionally.*\\]"));
370 >            if (testImplementationDetails)
371 >                assertTrue(f.toString().startsWith(
372 >                                   identityString(f) + "[Completed exceptionally: "));
373 >        }
374 >    }
375 >
376 >    /**
377 >     * completedFuture returns a completed CompletableFuture with given value
378 >     */
379 >    public void testCompletedFuture() {
380 >        CompletableFuture<String> f = CompletableFuture.completedFuture("test");
381 >        checkCompletedNormally(f, "test");
382 >    }
383 >
384 >    abstract static class CheckedAction {
385 >        int invocationCount = 0;
386 >        final ExecutionMode m;
387 >        CheckedAction(ExecutionMode m) { this.m = m; }
388 >        void invoked() {
389 >            m.checkExecutionMode();
390 >            assertEquals(0, invocationCount++);
391 >        }
392 >        void assertNotInvoked() { assertEquals(0, invocationCount); }
393 >        void assertInvoked() { assertEquals(1, invocationCount); }
394 >    }
395 >
396 >    abstract static class CheckedIntegerAction extends CheckedAction {
397 >        Integer value;
398 >        CheckedIntegerAction(ExecutionMode m) { super(m); }
399 >        void assertValue(Integer expected) {
400 >            assertInvoked();
401 >            assertEquals(expected, value);
402 >        }
403 >    }
404 >
405 >    static class IntegerSupplier extends CheckedAction
406 >        implements Supplier<Integer>
407 >    {
408 >        final Integer value;
409 >        IntegerSupplier(ExecutionMode m, Integer value) {
410 >            super(m);
411 >            this.value = value;
412 >        }
413 >        public Integer get() {
414 >            invoked();
415 >            return value;
416 >        }
417 >    }
418 >
419 >    // A function that handles and produces null values as well.
420 >    static Integer inc(Integer x) {
421 >        return (x == null) ? null : x + 1;
422 >    }
423 >
424 >    static class NoopConsumer extends CheckedIntegerAction
425 >        implements Consumer<Integer>
426 >    {
427 >        NoopConsumer(ExecutionMode m) { super(m); }
428 >        public void accept(Integer x) {
429 >            invoked();
430 >            value = x;
431 >        }
432 >    }
433 >
434 >    static class IncFunction extends CheckedIntegerAction
435 >        implements Function<Integer,Integer>
436 >    {
437 >        IncFunction(ExecutionMode m) { super(m); }
438 >        public Integer apply(Integer x) {
439 >            invoked();
440 >            return value = inc(x);
441 >        }
442 >    }
443 >
444 >    // Choose non-commutative actions for better coverage
445 >    // A non-commutative function that handles and produces null values as well.
446 >    static Integer subtract(Integer x, Integer y) {
447 >        return (x == null && y == null) ? null :
448 >            ((x == null) ? 42 : x.intValue())
449 >            - ((y == null) ? 99 : y.intValue());
450 >    }
451 >
452 >    static class SubtractAction extends CheckedIntegerAction
453 >        implements BiConsumer<Integer, Integer>
454 >    {
455 >        SubtractAction(ExecutionMode m) { super(m); }
456 >        public void accept(Integer x, Integer y) {
457 >            invoked();
458 >            value = subtract(x, y);
459 >        }
460 >    }
461 >
462 >    static class SubtractFunction extends CheckedIntegerAction
463 >        implements BiFunction<Integer, Integer, Integer>
464 >    {
465 >        SubtractFunction(ExecutionMode m) { super(m); }
466 >        public Integer apply(Integer x, Integer y) {
467 >            invoked();
468 >            return value = subtract(x, y);
469 >        }
470 >    }
471 >
472 >    static class Noop extends CheckedAction implements Runnable {
473 >        Noop(ExecutionMode m) { super(m); }
474 >        public void run() {
475 >            invoked();
476 >        }
477 >    }
478 >
479 >    static class FailingSupplier extends CheckedAction
480 >        implements Supplier<Integer>
481 >    {
482 >        final CFException ex;
483 >        FailingSupplier(ExecutionMode m) { super(m); ex = new CFException(); }
484 >        public Integer get() {
485 >            invoked();
486 >            throw ex;
487 >        }
488 >    }
489 >
490 >    static class FailingConsumer extends CheckedIntegerAction
491 >        implements Consumer<Integer>
492 >    {
493 >        final CFException ex;
494 >        FailingConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
495 >        public void accept(Integer x) {
496 >            invoked();
497 >            value = x;
498 >            throw ex;
499 >        }
500 >    }
501 >
502 >    static class FailingBiConsumer extends CheckedIntegerAction
503 >        implements BiConsumer<Integer, Integer>
504 >    {
505 >        final CFException ex;
506 >        FailingBiConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
507 >        public void accept(Integer x, Integer y) {
508 >            invoked();
509 >            value = subtract(x, y);
510 >            throw ex;
511 >        }
512 >    }
513 >
514 >    static class FailingFunction extends CheckedIntegerAction
515 >        implements Function<Integer, Integer>
516 >    {
517 >        final CFException ex;
518 >        FailingFunction(ExecutionMode m) { super(m); ex = new CFException(); }
519 >        public Integer apply(Integer x) {
520 >            invoked();
521 >            value = x;
522 >            throw ex;
523 >        }
524 >    }
525 >
526 >    static class FailingBiFunction extends CheckedIntegerAction
527 >        implements BiFunction<Integer, Integer, Integer>
528 >    {
529 >        final CFException ex;
530 >        FailingBiFunction(ExecutionMode m) { super(m); ex = new CFException(); }
531 >        public Integer apply(Integer x, Integer y) {
532 >            invoked();
533 >            value = subtract(x, y);
534 >            throw ex;
535 >        }
536 >    }
537 >
538 >    static class FailingRunnable extends CheckedAction implements Runnable {
539 >        final CFException ex;
540 >        FailingRunnable(ExecutionMode m) { super(m); ex = new CFException(); }
541 >        public void run() {
542 >            invoked();
543 >            throw ex;
544 >        }
545 >    }
546 >
547 >    static class CompletableFutureInc extends CheckedIntegerAction
548 >        implements Function<Integer, CompletableFuture<Integer>>
549 >    {
550 >        CompletableFutureInc(ExecutionMode m) { super(m); }
551 >        public CompletableFuture<Integer> apply(Integer x) {
552 >            invoked();
553 >            value = x;
554 >            return CompletableFuture.completedFuture(inc(x));
555 >        }
556 >    }
557 >
558 >    static class FailingExceptionalCompletableFutureFunction extends CheckedAction
559 >        implements Function<Throwable, CompletableFuture<Integer>>
560 >    {
561 >        final CFException ex;
562 >        FailingExceptionalCompletableFutureFunction(ExecutionMode m) { super(m); ex = new CFException(); }
563 >        public CompletableFuture<Integer> apply(Throwable x) {
564 >            invoked();
565 >            throw ex;
566 >        }
567 >    }
568 >
569 >    static class ExceptionalCompletableFutureFunction extends CheckedAction
570 >        implements Function<Throwable, CompletionStage<Integer>> {
571 >        final Integer value = 3;
572 >        ExceptionalCompletableFutureFunction(ExecutionMode m) { super(m); }
573 >        public CompletionStage<Integer> apply(Throwable x) {
574 >            invoked();
575 >            return CompletableFuture.completedFuture(value);
576 >        }
577 >    }
578 >
579 >    static class FailingCompletableFutureFunction extends CheckedIntegerAction
580 >        implements Function<Integer, CompletableFuture<Integer>>
581 >    {
582 >        final CFException ex;
583 >        FailingCompletableFutureFunction(ExecutionMode m) { super(m); ex = new CFException(); }
584 >        public CompletableFuture<Integer> apply(Integer x) {
585 >            invoked();
586 >            value = x;
587 >            throw ex;
588 >        }
589 >    }
590 >
591 >    static class CountingRejectingExecutor implements Executor {
592 >        final RejectedExecutionException ex = new RejectedExecutionException();
593 >        final AtomicInteger count = new AtomicInteger(0);
594 >        public void execute(Runnable r) {
595 >            count.getAndIncrement();
596 >            throw ex;
597 >        }
598 >    }
599 >
600 >    // Used for explicit executor tests
601 >    static final class ThreadExecutor implements Executor {
602 >        final AtomicInteger count = new AtomicInteger(0);
603 >        static final ThreadGroup tg = new ThreadGroup("ThreadExecutor");
604 >        static boolean startedCurrentThread() {
605 >            return Thread.currentThread().getThreadGroup() == tg;
606 >        }
607 >
608 >        public void execute(Runnable r) {
609 >            count.getAndIncrement();
610 >            new Thread(tg, r).start();
611 >        }
612 >    }
613 >
614 >    static final boolean defaultExecutorIsCommonPool
615 >        = ForkJoinPool.getCommonPoolParallelism() > 1;
616 >
617 >    /**
618 >     * Permits the testing of parallel code for the 3 different
619 >     * execution modes without copy/pasting all the test methods.
620 >     */
621 >    enum ExecutionMode {
622 >        SYNC {
623 >            public void checkExecutionMode() {
624 >                assertFalse(ThreadExecutor.startedCurrentThread());
625 >                assertNull(ForkJoinTask.getPool());
626 >            }
627 >            public CompletableFuture<Void> runAsync(Runnable a) {
628 >                throw new UnsupportedOperationException();
629 >            }
630 >            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
631 >                throw new UnsupportedOperationException();
632 >            }
633 >            public <T> CompletableFuture<Void> thenRun
634 >                (CompletableFuture<T> f, Runnable a) {
635 >                return f.thenRun(a);
636 >            }
637 >            public <T> CompletableFuture<Void> thenAccept
638 >                (CompletableFuture<T> f, Consumer<? super T> a) {
639 >                return f.thenAccept(a);
640 >            }
641 >            public <T,U> CompletableFuture<U> thenApply
642 >                (CompletableFuture<T> f, Function<? super T,U> a) {
643 >                return f.thenApply(a);
644 >            }
645 >            public <T,U> CompletableFuture<U> thenCompose
646 >                (CompletableFuture<T> f,
647 >                 Function<? super T,? extends CompletionStage<U>> a) {
648 >                return f.thenCompose(a);
649 >            }
650 >            public <T,U> CompletableFuture<U> handle
651 >                (CompletableFuture<T> f,
652 >                 BiFunction<? super T,Throwable,? extends U> a) {
653 >                return f.handle(a);
654 >            }
655 >            public <T> CompletableFuture<T> whenComplete
656 >                (CompletableFuture<T> f,
657 >                 BiConsumer<? super T,? super Throwable> a) {
658 >                return f.whenComplete(a);
659 >            }
660 >            public <T,U> CompletableFuture<Void> runAfterBoth
661 >                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
662 >                return f.runAfterBoth(g, a);
663 >            }
664 >            public <T,U> CompletableFuture<Void> thenAcceptBoth
665 >                (CompletableFuture<T> f,
666 >                 CompletionStage<? extends U> g,
667 >                 BiConsumer<? super T,? super U> a) {
668 >                return f.thenAcceptBoth(g, a);
669 >            }
670 >            public <T,U,V> CompletableFuture<V> thenCombine
671 >                (CompletableFuture<T> f,
672 >                 CompletionStage<? extends U> g,
673 >                 BiFunction<? super T,? super U,? extends V> a) {
674 >                return f.thenCombine(g, a);
675 >            }
676 >            public <T> CompletableFuture<Void> runAfterEither
677 >                (CompletableFuture<T> f,
678 >                 CompletionStage<?> g,
679 >                 java.lang.Runnable a) {
680 >                return f.runAfterEither(g, a);
681 >            }
682 >            public <T> CompletableFuture<Void> acceptEither
683 >                (CompletableFuture<T> f,
684 >                 CompletionStage<? extends T> g,
685 >                 Consumer<? super T> a) {
686 >                return f.acceptEither(g, a);
687 >            }
688 >            public <T,U> CompletableFuture<U> applyToEither
689 >                (CompletableFuture<T> f,
690 >                 CompletionStage<? extends T> g,
691 >                 Function<? super T,U> a) {
692 >                return f.applyToEither(g, a);
693 >            }
694 >            public <T> CompletableFuture<T> exceptionally
695 >                (CompletableFuture<T> f,
696 >                 Function<Throwable, ? extends T> fn) {
697 >                return f.exceptionally(fn);
698 >            }
699 >            public <T> CompletableFuture<T> exceptionallyCompose
700 >                (CompletableFuture<T> f, Function<Throwable, ? extends CompletionStage<T>> fn) {
701 >                return f.exceptionallyCompose(fn);
702 >            }
703 >        },
704 >        ASYNC {
705 >            public void checkExecutionMode() {
706 >                assertEquals(defaultExecutorIsCommonPool,
707 >                             (ForkJoinPool.commonPool() == ForkJoinTask.getPool()));
708 >            }
709 >            public CompletableFuture<Void> runAsync(Runnable a) {
710 >                return CompletableFuture.runAsync(a);
711 >            }
712 >            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
713 >                return CompletableFuture.supplyAsync(a);
714 >            }
715 >            public <T> CompletableFuture<Void> thenRun
716 >                (CompletableFuture<T> f, Runnable a) {
717 >                return f.thenRunAsync(a);
718 >            }
719 >            public <T> CompletableFuture<Void> thenAccept
720 >                (CompletableFuture<T> f, Consumer<? super T> a) {
721 >                return f.thenAcceptAsync(a);
722 >            }
723 >            public <T,U> CompletableFuture<U> thenApply
724 >                (CompletableFuture<T> f, Function<? super T,U> a) {
725 >                return f.thenApplyAsync(a);
726 >            }
727 >            public <T,U> CompletableFuture<U> thenCompose
728 >                (CompletableFuture<T> f,
729 >                 Function<? super T,? extends CompletionStage<U>> a) {
730 >                return f.thenComposeAsync(a);
731 >            }
732 >            public <T,U> CompletableFuture<U> handle
733 >                (CompletableFuture<T> f,
734 >                 BiFunction<? super T,Throwable,? extends U> a) {
735 >                return f.handleAsync(a);
736 >            }
737 >            public <T> CompletableFuture<T> whenComplete
738 >                (CompletableFuture<T> f,
739 >                 BiConsumer<? super T,? super Throwable> a) {
740 >                return f.whenCompleteAsync(a);
741 >            }
742 >            public <T,U> CompletableFuture<Void> runAfterBoth
743 >                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
744 >                return f.runAfterBothAsync(g, a);
745 >            }
746 >            public <T,U> CompletableFuture<Void> thenAcceptBoth
747 >                (CompletableFuture<T> f,
748 >                 CompletionStage<? extends U> g,
749 >                 BiConsumer<? super T,? super U> a) {
750 >                return f.thenAcceptBothAsync(g, a);
751 >            }
752 >            public <T,U,V> CompletableFuture<V> thenCombine
753 >                (CompletableFuture<T> f,
754 >                 CompletionStage<? extends U> g,
755 >                 BiFunction<? super T,? super U,? extends V> a) {
756 >                return f.thenCombineAsync(g, a);
757 >            }
758 >            public <T> CompletableFuture<Void> runAfterEither
759 >                (CompletableFuture<T> f,
760 >                 CompletionStage<?> g,
761 >                 java.lang.Runnable a) {
762 >                return f.runAfterEitherAsync(g, a);
763 >            }
764 >            public <T> CompletableFuture<Void> acceptEither
765 >                (CompletableFuture<T> f,
766 >                 CompletionStage<? extends T> g,
767 >                 Consumer<? super T> a) {
768 >                return f.acceptEitherAsync(g, a);
769 >            }
770 >            public <T,U> CompletableFuture<U> applyToEither
771 >                (CompletableFuture<T> f,
772 >                 CompletionStage<? extends T> g,
773 >                 Function<? super T,U> a) {
774 >                return f.applyToEitherAsync(g, a);
775 >            }
776 >            public <T> CompletableFuture<T> exceptionally
777 >                (CompletableFuture<T> f,
778 >                 Function<Throwable, ? extends T> fn) {
779 >                return f.exceptionallyAsync(fn);
780 >            }
781 >
782 >            public <T> CompletableFuture<T> exceptionallyCompose
783 >                (CompletableFuture<T> f, Function<Throwable, ? extends CompletionStage<T>> fn) {
784 >                return f.exceptionallyComposeAsync(fn);
785 >            }
786 >
787 >        },
788 >
789 >        EXECUTOR {
790 >            public void checkExecutionMode() {
791 >                assertTrue(ThreadExecutor.startedCurrentThread());
792 >            }
793 >            public CompletableFuture<Void> runAsync(Runnable a) {
794 >                return CompletableFuture.runAsync(a, new ThreadExecutor());
795 >            }
796 >            public <U> CompletableFuture<U> supplyAsync(Supplier<U> a) {
797 >                return CompletableFuture.supplyAsync(a, new ThreadExecutor());
798 >            }
799 >            public <T> CompletableFuture<Void> thenRun
800 >                (CompletableFuture<T> f, Runnable a) {
801 >                return f.thenRunAsync(a, new ThreadExecutor());
802 >            }
803 >            public <T> CompletableFuture<Void> thenAccept
804 >                (CompletableFuture<T> f, Consumer<? super T> a) {
805 >                return f.thenAcceptAsync(a, new ThreadExecutor());
806 >            }
807 >            public <T,U> CompletableFuture<U> thenApply
808 >                (CompletableFuture<T> f, Function<? super T,U> a) {
809 >                return f.thenApplyAsync(a, new ThreadExecutor());
810 >            }
811 >            public <T,U> CompletableFuture<U> thenCompose
812 >                (CompletableFuture<T> f,
813 >                 Function<? super T,? extends CompletionStage<U>> a) {
814 >                return f.thenComposeAsync(a, new ThreadExecutor());
815 >            }
816 >            public <T,U> CompletableFuture<U> handle
817 >                (CompletableFuture<T> f,
818 >                 BiFunction<? super T,Throwable,? extends U> a) {
819 >                return f.handleAsync(a, new ThreadExecutor());
820 >            }
821 >            public <T> CompletableFuture<T> whenComplete
822 >                (CompletableFuture<T> f,
823 >                 BiConsumer<? super T,? super Throwable> a) {
824 >                return f.whenCompleteAsync(a, new ThreadExecutor());
825 >            }
826 >            public <T,U> CompletableFuture<Void> runAfterBoth
827 >                (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a) {
828 >                return f.runAfterBothAsync(g, a, new ThreadExecutor());
829 >            }
830 >            public <T,U> CompletableFuture<Void> thenAcceptBoth
831 >                (CompletableFuture<T> f,
832 >                 CompletionStage<? extends U> g,
833 >                 BiConsumer<? super T,? super U> a) {
834 >                return f.thenAcceptBothAsync(g, a, new ThreadExecutor());
835 >            }
836 >            public <T,U,V> CompletableFuture<V> thenCombine
837 >                (CompletableFuture<T> f,
838 >                 CompletionStage<? extends U> g,
839 >                 BiFunction<? super T,? super U,? extends V> a) {
840 >                return f.thenCombineAsync(g, a, new ThreadExecutor());
841 >            }
842 >            public <T> CompletableFuture<Void> runAfterEither
843 >                (CompletableFuture<T> f,
844 >                 CompletionStage<?> g,
845 >                 java.lang.Runnable a) {
846 >                return f.runAfterEitherAsync(g, a, new ThreadExecutor());
847 >            }
848 >            public <T> CompletableFuture<Void> acceptEither
849 >                (CompletableFuture<T> f,
850 >                 CompletionStage<? extends T> g,
851 >                 Consumer<? super T> a) {
852 >                return f.acceptEitherAsync(g, a, new ThreadExecutor());
853 >            }
854 >            public <T,U> CompletableFuture<U> applyToEither
855 >                (CompletableFuture<T> f,
856 >                 CompletionStage<? extends T> g,
857 >                 Function<? super T,U> a) {
858 >                return f.applyToEitherAsync(g, a, new ThreadExecutor());
859 >            }
860 >            public <T> CompletableFuture<T> exceptionally
861 >                (CompletableFuture<T> f,
862 >                 Function<Throwable, ? extends T> fn) {
863 >                return f.exceptionallyAsync(fn, new ThreadExecutor());
864 >            }
865 >            public <T> CompletableFuture<T> exceptionallyCompose
866 >                (CompletableFuture<T> f, Function<Throwable, ? extends CompletionStage<T>> fn) {
867 >                return f.exceptionallyComposeAsync(fn, new ThreadExecutor());
868 >            }
869 >
870 >        };
871 >
872 >        public abstract void checkExecutionMode();
873 >        public abstract CompletableFuture<Void> runAsync(Runnable a);
874 >        public abstract <U> CompletableFuture<U> supplyAsync(Supplier<U> a);
875 >        public abstract <T> CompletableFuture<Void> thenRun
876 >            (CompletableFuture<T> f, Runnable a);
877 >        public abstract <T> CompletableFuture<Void> thenAccept
878 >            (CompletableFuture<T> f, Consumer<? super T> a);
879 >        public abstract <T,U> CompletableFuture<U> thenApply
880 >            (CompletableFuture<T> f, Function<? super T,U> a);
881 >        public abstract <T,U> CompletableFuture<U> thenCompose
882 >            (CompletableFuture<T> f,
883 >             Function<? super T,? extends CompletionStage<U>> a);
884 >        public abstract <T,U> CompletableFuture<U> handle
885 >            (CompletableFuture<T> f,
886 >             BiFunction<? super T,Throwable,? extends U> a);
887 >        public abstract <T> CompletableFuture<T> whenComplete
888 >            (CompletableFuture<T> f,
889 >             BiConsumer<? super T,? super Throwable> a);
890 >        public abstract <T,U> CompletableFuture<Void> runAfterBoth
891 >            (CompletableFuture<T> f, CompletableFuture<U> g, Runnable a);
892 >        public abstract <T,U> CompletableFuture<Void> thenAcceptBoth
893 >            (CompletableFuture<T> f,
894 >             CompletionStage<? extends U> g,
895 >             BiConsumer<? super T,? super U> a);
896 >        public abstract <T,U,V> CompletableFuture<V> thenCombine
897 >            (CompletableFuture<T> f,
898 >             CompletionStage<? extends U> g,
899 >             BiFunction<? super T,? super U,? extends V> a);
900 >        public abstract <T> CompletableFuture<Void> runAfterEither
901 >            (CompletableFuture<T> f,
902 >             CompletionStage<?> g,
903 >             java.lang.Runnable a);
904 >        public abstract <T> CompletableFuture<Void> acceptEither
905 >            (CompletableFuture<T> f,
906 >             CompletionStage<? extends T> g,
907 >             Consumer<? super T> a);
908 >        public abstract <T,U> CompletableFuture<U> applyToEither
909 >            (CompletableFuture<T> f,
910 >             CompletionStage<? extends T> g,
911 >             Function<? super T,U> a);
912 >        public abstract <T> CompletableFuture<T> exceptionally
913 >            (CompletableFuture<T> f,
914 >             Function<Throwable, ? extends T> fn);
915 >        public abstract <T> CompletableFuture<T> exceptionallyCompose
916 >            (CompletableFuture<T> f,
917 >             Function<Throwable, ? extends CompletionStage<T>> fn);
918 >    }
919 >
920 >    /**
921 >     * exceptionally action is not invoked when source completes
922 >     * normally, and source result is propagated
923 >     */
924 >    public void testExceptionally_normalCompletion() {
925 >        for (ExecutionMode m : ExecutionMode.values())
926 >        for (boolean createIncomplete : new boolean[] { true, false })
927 >        for (Integer v1 : new Integer[] { 1, null })
928 >    {
929 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
930 >        if (!createIncomplete) assertTrue(f.complete(v1));
931 >        final CompletableFuture<Integer> g = m.exceptionally
932 >            (f, (Throwable t) -> {
933 >                threadFail("should not be called");
934 >                return null;            // unreached
935 >            });
936 >        if (createIncomplete) assertTrue(f.complete(v1));
937 >
938 >        checkCompletedNormally(g, v1);
939 >        checkCompletedNormally(f, v1);
940 >    }}
941 >
942 >    /**
943 >     * exceptionally action completes with function value on source
944 >     * exception
945 >     */
946 >    public void testExceptionally_exceptionalCompletion() {
947 >        for (ExecutionMode m : ExecutionMode.values())
948 >        for (boolean createIncomplete : new boolean[] { true, false })
949 >        for (Integer v1 : new Integer[] { 1, null })
950 >    {
951 >        final AtomicInteger a = new AtomicInteger(0);
952 >        final CFException ex = new CFException();
953 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
954 >        if (!createIncomplete) f.completeExceptionally(ex);
955 >        final CompletableFuture<Integer> g = m.exceptionally
956 >            (f, (Throwable t) -> {
957 >                m.checkExecutionMode();
958 >                threadAssertSame(t, ex);
959 >                a.getAndIncrement();
960 >                return v1;
961 >            });
962 >        if (createIncomplete) f.completeExceptionally(ex);
963 >
964 >        checkCompletedNormally(g, v1);
965 >        assertEquals(1, a.get());
966 >    }}
967 >
968 >    /**
969 >     * If an "exceptionally action" throws an exception, it completes
970 >     * exceptionally with that exception
971 >     */
972 >    public void testExceptionally_exceptionalCompletionActionFailed() {
973 >        for (ExecutionMode m : ExecutionMode.values())
974 >        for (boolean createIncomplete : new boolean[] { true, false })
975 >    {
976 >        final AtomicInteger a = new AtomicInteger(0);
977 >        final CFException ex1 = new CFException();
978 >        final CFException ex2 = new CFException();
979 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
980 >        if (!createIncomplete) f.completeExceptionally(ex1);
981 >        final CompletableFuture<Integer> g = m.exceptionally
982 >            (f, (Throwable t) -> {
983 >                m.checkExecutionMode();
984 >                threadAssertSame(t, ex1);
985 >                a.getAndIncrement();
986 >                throw ex2;
987 >            });
988 >        if (createIncomplete) f.completeExceptionally(ex1);
989 >
990 >        checkCompletedWithWrappedException(g, ex2);
991 >        checkCompletedExceptionally(f, ex1);
992 >        assertEquals(1, a.get());
993 >    }}
994 >
995 >    /**
996 >     * whenComplete action executes on normal completion, propagating
997 >     * source result.
998 >     */
999 >    public void testWhenComplete_normalCompletion() {
1000 >        for (ExecutionMode m : ExecutionMode.values())
1001 >        for (boolean createIncomplete : new boolean[] { true, false })
1002 >        for (Integer v1 : new Integer[] { 1, null })
1003 >    {
1004 >        final AtomicInteger a = new AtomicInteger(0);
1005 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1006 >        if (!createIncomplete) assertTrue(f.complete(v1));
1007 >        final CompletableFuture<Integer> g = m.whenComplete
1008 >            (f,
1009 >             (Integer result, Throwable t) -> {
1010 >                m.checkExecutionMode();
1011 >                threadAssertSame(result, v1);
1012 >                threadAssertNull(t);
1013 >                a.getAndIncrement();
1014 >            });
1015 >        if (createIncomplete) assertTrue(f.complete(v1));
1016 >
1017 >        checkCompletedNormally(g, v1);
1018 >        checkCompletedNormally(f, v1);
1019 >        assertEquals(1, a.get());
1020 >    }}
1021 >
1022 >    /**
1023 >     * whenComplete action executes on exceptional completion, propagating
1024 >     * source result.
1025 >     */
1026 >    public void testWhenComplete_exceptionalCompletion() {
1027 >        for (ExecutionMode m : ExecutionMode.values())
1028 >        for (boolean createIncomplete : new boolean[] { true, false })
1029 >    {
1030 >        final AtomicInteger a = new AtomicInteger(0);
1031 >        final CFException ex = new CFException();
1032 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1033 >        if (!createIncomplete) f.completeExceptionally(ex);
1034 >        final CompletableFuture<Integer> g = m.whenComplete
1035 >            (f,
1036 >             (Integer result, Throwable t) -> {
1037 >                m.checkExecutionMode();
1038 >                threadAssertNull(result);
1039 >                threadAssertSame(t, ex);
1040 >                a.getAndIncrement();
1041 >            });
1042 >        if (createIncomplete) f.completeExceptionally(ex);
1043 >
1044 >        checkCompletedWithWrappedException(g, ex);
1045 >        checkCompletedExceptionally(f, ex);
1046 >        assertEquals(1, a.get());
1047 >    }}
1048 >
1049 >    /**
1050 >     * whenComplete action executes on cancelled source, propagating
1051 >     * CancellationException.
1052 >     */
1053 >    public void testWhenComplete_sourceCancelled() {
1054 >        for (ExecutionMode m : ExecutionMode.values())
1055 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1056 >        for (boolean createIncomplete : new boolean[] { true, false })
1057 >    {
1058 >        final AtomicInteger a = new AtomicInteger(0);
1059 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1060 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1061 >        final CompletableFuture<Integer> g = m.whenComplete
1062 >            (f,
1063 >             (Integer result, Throwable t) -> {
1064 >                m.checkExecutionMode();
1065 >                threadAssertNull(result);
1066 >                threadAssertTrue(t instanceof CancellationException);
1067 >                a.getAndIncrement();
1068 >            });
1069 >        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1070 >
1071 >        checkCompletedWithWrappedCancellationException(g);
1072 >        checkCancelled(f);
1073 >        assertEquals(1, a.get());
1074 >    }}
1075 >
1076 >    /**
1077 >     * If a whenComplete action throws an exception when triggered by
1078 >     * a normal completion, it completes exceptionally
1079 >     */
1080 >    public void testWhenComplete_sourceCompletedNormallyActionFailed() {
1081 >        for (boolean createIncomplete : new boolean[] { true, false })
1082 >        for (ExecutionMode m : ExecutionMode.values())
1083 >        for (Integer v1 : new Integer[] { 1, null })
1084 >    {
1085 >        final AtomicInteger a = new AtomicInteger(0);
1086 >        final CFException ex = new CFException();
1087 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1088 >        if (!createIncomplete) assertTrue(f.complete(v1));
1089 >        final CompletableFuture<Integer> g = m.whenComplete
1090 >            (f,
1091 >             (Integer result, Throwable t) -> {
1092 >                m.checkExecutionMode();
1093 >                threadAssertSame(result, v1);
1094 >                threadAssertNull(t);
1095 >                a.getAndIncrement();
1096 >                throw ex;
1097 >            });
1098 >        if (createIncomplete) assertTrue(f.complete(v1));
1099 >
1100 >        checkCompletedWithWrappedException(g, ex);
1101 >        checkCompletedNormally(f, v1);
1102 >        assertEquals(1, a.get());
1103 >    }}
1104 >
1105 >    /**
1106 >     * If a whenComplete action throws an exception when triggered by
1107 >     * a source completion that also throws an exception, the source
1108 >     * exception takes precedence (unlike handle)
1109 >     */
1110 >    public void testWhenComplete_sourceFailedActionFailed() {
1111 >        for (boolean createIncomplete : new boolean[] { true, false })
1112 >        for (ExecutionMode m : ExecutionMode.values())
1113 >    {
1114 >        final AtomicInteger a = new AtomicInteger(0);
1115 >        final CFException ex1 = new CFException();
1116 >        final CFException ex2 = new CFException();
1117 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1118 >
1119 >        if (!createIncomplete) f.completeExceptionally(ex1);
1120 >        final CompletableFuture<Integer> g = m.whenComplete
1121 >            (f,
1122 >             (Integer result, Throwable t) -> {
1123 >                m.checkExecutionMode();
1124 >                threadAssertSame(t, ex1);
1125 >                threadAssertNull(result);
1126 >                a.getAndIncrement();
1127 >                throw ex2;
1128 >            });
1129 >        if (createIncomplete) f.completeExceptionally(ex1);
1130 >
1131 >        checkCompletedWithWrappedException(g, ex1);
1132 >        checkCompletedExceptionally(f, ex1);
1133 >        if (testImplementationDetails) {
1134 >            assertEquals(1, ex1.getSuppressed().length);
1135 >            assertSame(ex2, ex1.getSuppressed()[0]);
1136 >        }
1137 >        assertEquals(1, a.get());
1138 >    }}
1139 >
1140 >    /**
1141 >     * handle action completes normally with function value on normal
1142 >     * completion of source
1143 >     */
1144 >    public void testHandle_normalCompletion() {
1145 >        for (ExecutionMode m : ExecutionMode.values())
1146 >        for (boolean createIncomplete : new boolean[] { true, false })
1147 >        for (Integer v1 : new Integer[] { 1, null })
1148 >    {
1149 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1150 >        final AtomicInteger a = new AtomicInteger(0);
1151 >        if (!createIncomplete) assertTrue(f.complete(v1));
1152 >        final CompletableFuture<Integer> g = m.handle
1153 >            (f,
1154 >             (Integer result, Throwable t) -> {
1155 >                m.checkExecutionMode();
1156 >                threadAssertSame(result, v1);
1157 >                threadAssertNull(t);
1158 >                a.getAndIncrement();
1159 >                return inc(v1);
1160 >            });
1161 >        if (createIncomplete) assertTrue(f.complete(v1));
1162 >
1163 >        checkCompletedNormally(g, inc(v1));
1164 >        checkCompletedNormally(f, v1);
1165 >        assertEquals(1, a.get());
1166 >    }}
1167 >
1168 >    /**
1169 >     * handle action completes normally with function value on
1170 >     * exceptional completion of source
1171 >     */
1172 >    public void testHandle_exceptionalCompletion() {
1173 >        for (ExecutionMode m : ExecutionMode.values())
1174 >        for (boolean createIncomplete : new boolean[] { true, false })
1175 >        for (Integer v1 : new Integer[] { 1, null })
1176 >    {
1177 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1178 >        final AtomicInteger a = new AtomicInteger(0);
1179 >        final CFException ex = new CFException();
1180 >        if (!createIncomplete) f.completeExceptionally(ex);
1181 >        final CompletableFuture<Integer> g = m.handle
1182 >            (f,
1183 >             (Integer result, Throwable t) -> {
1184 >                m.checkExecutionMode();
1185 >                threadAssertNull(result);
1186 >                threadAssertSame(t, ex);
1187 >                a.getAndIncrement();
1188 >                return v1;
1189 >            });
1190 >        if (createIncomplete) f.completeExceptionally(ex);
1191 >
1192 >        checkCompletedNormally(g, v1);
1193 >        checkCompletedExceptionally(f, ex);
1194 >        assertEquals(1, a.get());
1195 >    }}
1196 >
1197 >    /**
1198 >     * handle action completes normally with function value on
1199 >     * cancelled source
1200 >     */
1201 >    public void testHandle_sourceCancelled() {
1202 >        for (ExecutionMode m : ExecutionMode.values())
1203 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1204 >        for (boolean createIncomplete : new boolean[] { true, false })
1205 >        for (Integer v1 : new Integer[] { 1, null })
1206 >    {
1207 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1208 >        final AtomicInteger a = new AtomicInteger(0);
1209 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1210 >        final CompletableFuture<Integer> g = m.handle
1211 >            (f,
1212 >             (Integer result, Throwable t) -> {
1213 >                m.checkExecutionMode();
1214 >                threadAssertNull(result);
1215 >                threadAssertTrue(t instanceof CancellationException);
1216 >                a.getAndIncrement();
1217 >                return v1;
1218 >            });
1219 >        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1220 >
1221 >        checkCompletedNormally(g, v1);
1222 >        checkCancelled(f);
1223 >        assertEquals(1, a.get());
1224 >    }}
1225 >
1226 >    /**
1227 >     * If a "handle action" throws an exception when triggered by
1228 >     * a normal completion, it completes exceptionally
1229 >     */
1230 >    public void testHandle_sourceCompletedNormallyActionFailed() {
1231 >        for (ExecutionMode m : ExecutionMode.values())
1232 >        for (boolean createIncomplete : new boolean[] { true, false })
1233 >        for (Integer v1 : new Integer[] { 1, null })
1234 >    {
1235 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1236 >        final AtomicInteger a = new AtomicInteger(0);
1237 >        final CFException ex = new CFException();
1238 >        if (!createIncomplete) assertTrue(f.complete(v1));
1239 >        final CompletableFuture<Integer> g = m.handle
1240 >            (f,
1241 >             (Integer result, Throwable t) -> {
1242 >                m.checkExecutionMode();
1243 >                threadAssertSame(result, v1);
1244 >                threadAssertNull(t);
1245 >                a.getAndIncrement();
1246 >                throw ex;
1247 >            });
1248 >        if (createIncomplete) assertTrue(f.complete(v1));
1249 >
1250 >        checkCompletedWithWrappedException(g, ex);
1251 >        checkCompletedNormally(f, v1);
1252 >        assertEquals(1, a.get());
1253 >    }}
1254 >
1255 >    /**
1256 >     * If a "handle action" throws an exception when triggered by
1257 >     * a source completion that also throws an exception, the action
1258 >     * exception takes precedence (unlike whenComplete)
1259 >     */
1260 >    public void testHandle_sourceFailedActionFailed() {
1261 >        for (boolean createIncomplete : new boolean[] { true, false })
1262 >        for (ExecutionMode m : ExecutionMode.values())
1263 >    {
1264 >        final AtomicInteger a = new AtomicInteger(0);
1265 >        final CFException ex1 = new CFException();
1266 >        final CFException ex2 = new CFException();
1267 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1268 >
1269 >        if (!createIncomplete) f.completeExceptionally(ex1);
1270 >        final CompletableFuture<Integer> g = m.handle
1271 >            (f,
1272 >             (Integer result, Throwable t) -> {
1273 >                m.checkExecutionMode();
1274 >                threadAssertNull(result);
1275 >                threadAssertSame(ex1, t);
1276 >                a.getAndIncrement();
1277 >                throw ex2;
1278 >            });
1279 >        if (createIncomplete) f.completeExceptionally(ex1);
1280 >
1281 >        checkCompletedWithWrappedException(g, ex2);
1282 >        checkCompletedExceptionally(f, ex1);
1283 >        assertEquals(1, a.get());
1284 >    }}
1285 >
1286 >    /**
1287 >     * runAsync completes after running Runnable
1288 >     */
1289 >    public void testRunAsync_normalCompletion() {
1290 >        ExecutionMode[] executionModes = {
1291 >            ExecutionMode.ASYNC,
1292 >            ExecutionMode.EXECUTOR,
1293 >        };
1294 >        for (ExecutionMode m : executionModes)
1295 >    {
1296 >        final Noop r = new Noop(m);
1297 >        final CompletableFuture<Void> f = m.runAsync(r);
1298 >        assertNull(f.join());
1299 >        checkCompletedNormally(f, null);
1300 >        r.assertInvoked();
1301 >    }}
1302 >
1303 >    /**
1304 >     * failing runAsync completes exceptionally after running Runnable
1305 >     */
1306 >    public void testRunAsync_exceptionalCompletion() {
1307 >        ExecutionMode[] executionModes = {
1308 >            ExecutionMode.ASYNC,
1309 >            ExecutionMode.EXECUTOR,
1310 >        };
1311 >        for (ExecutionMode m : executionModes)
1312 >    {
1313 >        final FailingRunnable r = new FailingRunnable(m);
1314 >        final CompletableFuture<Void> f = m.runAsync(r);
1315 >        checkCompletedWithWrappedException(f, r.ex);
1316 >        r.assertInvoked();
1317 >    }}
1318 >
1319 >    @SuppressWarnings("FutureReturnValueIgnored")
1320 >    public void testRunAsync_rejectingExecutor() {
1321 >        CountingRejectingExecutor e = new CountingRejectingExecutor();
1322 >        try {
1323 >            CompletableFuture.runAsync(() -> {}, e);
1324 >            shouldThrow();
1325 >        } catch (Throwable t) {
1326 >            assertSame(e.ex, t);
1327 >        }
1328 >
1329 >        assertEquals(1, e.count.get());
1330 >    }
1331 >
1332 >    /**
1333 >     * supplyAsync completes with result of supplier
1334 >     */
1335 >    public void testSupplyAsync_normalCompletion() {
1336 >        ExecutionMode[] executionModes = {
1337 >            ExecutionMode.ASYNC,
1338 >            ExecutionMode.EXECUTOR,
1339 >        };
1340 >        for (ExecutionMode m : executionModes)
1341 >        for (Integer v1 : new Integer[] { 1, null })
1342 >    {
1343 >        final IntegerSupplier r = new IntegerSupplier(m, v1);
1344 >        final CompletableFuture<Integer> f = m.supplyAsync(r);
1345 >        assertSame(v1, f.join());
1346 >        checkCompletedNormally(f, v1);
1347 >        r.assertInvoked();
1348 >    }}
1349  
1350 <        f = new CompletableFuture<String>();
1351 <        assertTrue(f.toString().contains("[Not completed]"));
1350 >    /**
1351 >     * Failing supplyAsync completes exceptionally
1352 >     */
1353 >    public void testSupplyAsync_exceptionalCompletion() {
1354 >        ExecutionMode[] executionModes = {
1355 >            ExecutionMode.ASYNC,
1356 >            ExecutionMode.EXECUTOR,
1357 >        };
1358 >        for (ExecutionMode m : executionModes)
1359 >    {
1360 >        FailingSupplier r = new FailingSupplier(m);
1361 >        CompletableFuture<Integer> f = m.supplyAsync(r);
1362 >        checkCompletedWithWrappedException(f, r.ex);
1363 >        r.assertInvoked();
1364 >    }}
1365  
1366 <        f.complete("foo");
1367 <        assertTrue(f.toString().contains("[Completed normally]"));
1366 >    @SuppressWarnings("FutureReturnValueIgnored")
1367 >    public void testSupplyAsync_rejectingExecutor() {
1368 >        CountingRejectingExecutor e = new CountingRejectingExecutor();
1369 >        try {
1370 >            CompletableFuture.supplyAsync(() -> null, e);
1371 >            shouldThrow();
1372 >        } catch (Throwable t) {
1373 >            assertSame(e.ex, t);
1374 >        }
1375  
1376 <        f = new CompletableFuture<String>();
41 <        f.completeExceptionally(new IndexOutOfBoundsException());
42 <        assertTrue(f.toString().contains("[Completed exceptionally]"));
1376 >        assertEquals(1, e.count.get());
1377      }
1378 +
1379 +    // seq completion methods
1380 +
1381 +    /**
1382 +     * thenRun result completes normally after normal completion of source
1383 +     */
1384 +    public void testThenRun_normalCompletion() {
1385 +        for (ExecutionMode m : ExecutionMode.values())
1386 +        for (Integer v1 : new Integer[] { 1, null })
1387 +    {
1388 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1389 +        final Noop[] rs = new Noop[6];
1390 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1391 +
1392 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1393 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1394 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1395 +        checkIncomplete(h0);
1396 +        checkIncomplete(h1);
1397 +        checkIncomplete(h2);
1398 +        assertTrue(f.complete(v1));
1399 +        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1400 +        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1401 +        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1402 +
1403 +        checkCompletedNormally(h0, null);
1404 +        checkCompletedNormally(h1, null);
1405 +        checkCompletedNormally(h2, null);
1406 +        checkCompletedNormally(h3, null);
1407 +        checkCompletedNormally(h4, null);
1408 +        checkCompletedNormally(h5, null);
1409 +        checkCompletedNormally(f, v1);
1410 +        for (Noop r : rs) r.assertInvoked();
1411 +    }}
1412 +
1413 +    /**
1414 +     * thenRun result completes exceptionally after exceptional
1415 +     * completion of source
1416 +     */
1417 +    public void testThenRun_exceptionalCompletion() {
1418 +        for (ExecutionMode m : ExecutionMode.values())
1419 +    {
1420 +        final CFException ex = new CFException();
1421 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1422 +        final Noop[] rs = new Noop[6];
1423 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1424 +
1425 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1426 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1427 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1428 +        checkIncomplete(h0);
1429 +        checkIncomplete(h1);
1430 +        checkIncomplete(h2);
1431 +        assertTrue(f.completeExceptionally(ex));
1432 +        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1433 +        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1434 +        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1435 +
1436 +        checkCompletedWithWrappedException(h0, ex);
1437 +        checkCompletedWithWrappedException(h1, ex);
1438 +        checkCompletedWithWrappedException(h2, ex);
1439 +        checkCompletedWithWrappedException(h3, ex);
1440 +        checkCompletedWithWrappedException(h4, ex);
1441 +        checkCompletedWithWrappedException(h5, ex);
1442 +        checkCompletedExceptionally(f, ex);
1443 +        for (Noop r : rs) r.assertNotInvoked();
1444 +    }}
1445 +
1446 +    /**
1447 +     * thenRun result completes exceptionally if source cancelled
1448 +     */
1449 +    public void testThenRun_sourceCancelled() {
1450 +        for (ExecutionMode m : ExecutionMode.values())
1451 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1452 +    {
1453 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1454 +        final Noop[] rs = new Noop[6];
1455 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1456 +
1457 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1458 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1459 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1460 +        checkIncomplete(h0);
1461 +        checkIncomplete(h1);
1462 +        checkIncomplete(h2);
1463 +        assertTrue(f.cancel(mayInterruptIfRunning));
1464 +        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1465 +        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1466 +        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1467 +
1468 +        checkCompletedWithWrappedCancellationException(h0);
1469 +        checkCompletedWithWrappedCancellationException(h1);
1470 +        checkCompletedWithWrappedCancellationException(h2);
1471 +        checkCompletedWithWrappedCancellationException(h3);
1472 +        checkCompletedWithWrappedCancellationException(h4);
1473 +        checkCompletedWithWrappedCancellationException(h5);
1474 +        checkCancelled(f);
1475 +        for (Noop r : rs) r.assertNotInvoked();
1476 +    }}
1477 +
1478 +    /**
1479 +     * thenRun result completes exceptionally if action does
1480 +     */
1481 +    public void testThenRun_actionFailed() {
1482 +        for (ExecutionMode m : ExecutionMode.values())
1483 +        for (Integer v1 : new Integer[] { 1, null })
1484 +    {
1485 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1486 +        final FailingRunnable[] rs = new FailingRunnable[6];
1487 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
1488 +
1489 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1490 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1491 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1492 +        assertTrue(f.complete(v1));
1493 +        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1494 +        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1495 +        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1496 +
1497 +        checkCompletedWithWrappedException(h0, rs[0].ex);
1498 +        checkCompletedWithWrappedException(h1, rs[1].ex);
1499 +        checkCompletedWithWrappedException(h2, rs[2].ex);
1500 +        checkCompletedWithWrappedException(h3, rs[3].ex);
1501 +        checkCompletedWithWrappedException(h4, rs[4].ex);
1502 +        checkCompletedWithWrappedException(h5, rs[5].ex);
1503 +        checkCompletedNormally(f, v1);
1504 +    }}
1505 +
1506 +    /**
1507 +     * thenApply result completes normally after normal completion of source
1508 +     */
1509 +    public void testThenApply_normalCompletion() {
1510 +        for (ExecutionMode m : ExecutionMode.values())
1511 +        for (Integer v1 : new Integer[] { 1, null })
1512 +    {
1513 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1514 +        final IncFunction[] rs = new IncFunction[4];
1515 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1516 +
1517 +        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1518 +        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1519 +        checkIncomplete(h0);
1520 +        checkIncomplete(h1);
1521 +        assertTrue(f.complete(v1));
1522 +        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1523 +        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1524 +
1525 +        checkCompletedNormally(h0, inc(v1));
1526 +        checkCompletedNormally(h1, inc(v1));
1527 +        checkCompletedNormally(h2, inc(v1));
1528 +        checkCompletedNormally(h3, inc(v1));
1529 +        checkCompletedNormally(f, v1);
1530 +        for (IncFunction r : rs) r.assertValue(inc(v1));
1531 +    }}
1532 +
1533 +    /**
1534 +     * thenApply result completes exceptionally after exceptional
1535 +     * completion of source
1536 +     */
1537 +    public void testThenApply_exceptionalCompletion() {
1538 +        for (ExecutionMode m : ExecutionMode.values())
1539 +    {
1540 +        final CFException ex = new CFException();
1541 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1542 +        final IncFunction[] rs = new IncFunction[4];
1543 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1544 +
1545 +        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1546 +        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1547 +        assertTrue(f.completeExceptionally(ex));
1548 +        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1549 +        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1550 +
1551 +        checkCompletedWithWrappedException(h0, ex);
1552 +        checkCompletedWithWrappedException(h1, ex);
1553 +        checkCompletedWithWrappedException(h2, ex);
1554 +        checkCompletedWithWrappedException(h3, ex);
1555 +        checkCompletedExceptionally(f, ex);
1556 +        for (IncFunction r : rs) r.assertNotInvoked();
1557 +    }}
1558 +
1559 +    /**
1560 +     * thenApply result completes exceptionally if source cancelled
1561 +     */
1562 +    public void testThenApply_sourceCancelled() {
1563 +        for (ExecutionMode m : ExecutionMode.values())
1564 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1565 +    {
1566 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1567 +        final IncFunction[] rs = new IncFunction[4];
1568 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1569 +
1570 +        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1571 +        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1572 +        assertTrue(f.cancel(mayInterruptIfRunning));
1573 +        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1574 +        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1575 +
1576 +        checkCompletedWithWrappedCancellationException(h0);
1577 +        checkCompletedWithWrappedCancellationException(h1);
1578 +        checkCompletedWithWrappedCancellationException(h2);
1579 +        checkCompletedWithWrappedCancellationException(h3);
1580 +        checkCancelled(f);
1581 +        for (IncFunction r : rs) r.assertNotInvoked();
1582 +    }}
1583 +
1584 +    /**
1585 +     * thenApply result completes exceptionally if action does
1586 +     */
1587 +    public void testThenApply_actionFailed() {
1588 +        for (ExecutionMode m : ExecutionMode.values())
1589 +        for (Integer v1 : new Integer[] { 1, null })
1590 +    {
1591 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1592 +        final FailingFunction[] rs = new FailingFunction[4];
1593 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
1594 +
1595 +        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1596 +        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1597 +        assertTrue(f.complete(v1));
1598 +        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1599 +        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1600 +
1601 +        checkCompletedWithWrappedException(h0, rs[0].ex);
1602 +        checkCompletedWithWrappedException(h1, rs[1].ex);
1603 +        checkCompletedWithWrappedException(h2, rs[2].ex);
1604 +        checkCompletedWithWrappedException(h3, rs[3].ex);
1605 +        checkCompletedNormally(f, v1);
1606 +    }}
1607 +
1608 +    /**
1609 +     * thenAccept result completes normally after normal completion of source
1610 +     */
1611 +    public void testThenAccept_normalCompletion() {
1612 +        for (ExecutionMode m : ExecutionMode.values())
1613 +        for (Integer v1 : new Integer[] { 1, null })
1614 +    {
1615 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1616 +        final NoopConsumer[] rs = new NoopConsumer[4];
1617 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1618 +
1619 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1620 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1621 +        checkIncomplete(h0);
1622 +        checkIncomplete(h1);
1623 +        assertTrue(f.complete(v1));
1624 +        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1625 +        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1626 +
1627 +        checkCompletedNormally(h0, null);
1628 +        checkCompletedNormally(h1, null);
1629 +        checkCompletedNormally(h2, null);
1630 +        checkCompletedNormally(h3, null);
1631 +        checkCompletedNormally(f, v1);
1632 +        for (NoopConsumer r : rs) r.assertValue(v1);
1633 +    }}
1634 +
1635 +    /**
1636 +     * thenAccept result completes exceptionally after exceptional
1637 +     * completion of source
1638 +     */
1639 +    public void testThenAccept_exceptionalCompletion() {
1640 +        for (ExecutionMode m : ExecutionMode.values())
1641 +    {
1642 +        final CFException ex = new CFException();
1643 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1644 +        final NoopConsumer[] rs = new NoopConsumer[4];
1645 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1646 +
1647 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1648 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1649 +        assertTrue(f.completeExceptionally(ex));
1650 +        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1651 +        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1652 +
1653 +        checkCompletedWithWrappedException(h0, ex);
1654 +        checkCompletedWithWrappedException(h1, ex);
1655 +        checkCompletedWithWrappedException(h2, ex);
1656 +        checkCompletedWithWrappedException(h3, ex);
1657 +        checkCompletedExceptionally(f, ex);
1658 +        for (NoopConsumer r : rs) r.assertNotInvoked();
1659 +    }}
1660 +
1661 +    /**
1662 +     * thenAccept result completes exceptionally if source cancelled
1663 +     */
1664 +    public void testThenAccept_sourceCancelled() {
1665 +        for (ExecutionMode m : ExecutionMode.values())
1666 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1667 +    {
1668 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1669 +        final NoopConsumer[] rs = new NoopConsumer[4];
1670 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1671 +
1672 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1673 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1674 +        assertTrue(f.cancel(mayInterruptIfRunning));
1675 +        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1676 +        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1677 +
1678 +        checkCompletedWithWrappedCancellationException(h0);
1679 +        checkCompletedWithWrappedCancellationException(h1);
1680 +        checkCompletedWithWrappedCancellationException(h2);
1681 +        checkCompletedWithWrappedCancellationException(h3);
1682 +        checkCancelled(f);
1683 +        for (NoopConsumer r : rs) r.assertNotInvoked();
1684 +    }}
1685 +
1686 +    /**
1687 +     * thenAccept result completes exceptionally if action does
1688 +     */
1689 +    public void testThenAccept_actionFailed() {
1690 +        for (ExecutionMode m : ExecutionMode.values())
1691 +        for (Integer v1 : new Integer[] { 1, null })
1692 +    {
1693 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1694 +        final FailingConsumer[] rs = new FailingConsumer[4];
1695 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
1696 +
1697 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1698 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1699 +        assertTrue(f.complete(v1));
1700 +        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1701 +        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1702 +
1703 +        checkCompletedWithWrappedException(h0, rs[0].ex);
1704 +        checkCompletedWithWrappedException(h1, rs[1].ex);
1705 +        checkCompletedWithWrappedException(h2, rs[2].ex);
1706 +        checkCompletedWithWrappedException(h3, rs[3].ex);
1707 +        checkCompletedNormally(f, v1);
1708 +    }}
1709 +
1710 +    /**
1711 +     * thenCombine result completes normally after normal completion
1712 +     * of sources
1713 +     */
1714 +    public void testThenCombine_normalCompletion() {
1715 +        for (ExecutionMode m : ExecutionMode.values())
1716 +        for (boolean fFirst : new boolean[] { true, false })
1717 +        for (Integer v1 : new Integer[] { 1, null })
1718 +        for (Integer v2 : new Integer[] { 2, null })
1719 +    {
1720 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1721 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1722 +        final SubtractFunction[] rs = new SubtractFunction[6];
1723 +        for (int i = 0; i < rs.length; i++) rs[i] = new SubtractFunction(m);
1724 +
1725 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1726 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1727 +        final Integer w1 =  fFirst ? v1 : v2;
1728 +        final Integer w2 = !fFirst ? v1 : v2;
1729 +
1730 +        final CompletableFuture<Integer> h0 = m.thenCombine(f, g, rs[0]);
1731 +        final CompletableFuture<Integer> h1 = m.thenCombine(fst, fst, rs[1]);
1732 +        assertTrue(fst.complete(w1));
1733 +        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, rs[2]);
1734 +        final CompletableFuture<Integer> h3 = m.thenCombine(fst, fst, rs[3]);
1735 +        checkIncomplete(h0); rs[0].assertNotInvoked();
1736 +        checkIncomplete(h2); rs[2].assertNotInvoked();
1737 +        checkCompletedNormally(h1, subtract(w1, w1));
1738 +        checkCompletedNormally(h3, subtract(w1, w1));
1739 +        rs[1].assertValue(subtract(w1, w1));
1740 +        rs[3].assertValue(subtract(w1, w1));
1741 +        assertTrue(snd.complete(w2));
1742 +        final CompletableFuture<Integer> h4 = m.thenCombine(f, g, rs[4]);
1743 +
1744 +        checkCompletedNormally(h0, subtract(v1, v2));
1745 +        checkCompletedNormally(h2, subtract(v1, v2));
1746 +        checkCompletedNormally(h4, subtract(v1, v2));
1747 +        rs[0].assertValue(subtract(v1, v2));
1748 +        rs[2].assertValue(subtract(v1, v2));
1749 +        rs[4].assertValue(subtract(v1, v2));
1750 +
1751 +        checkCompletedNormally(f, v1);
1752 +        checkCompletedNormally(g, v2);
1753 +    }}
1754 +
1755 +    /**
1756 +     * thenCombine result completes exceptionally after exceptional
1757 +     * completion of either source
1758 +     */
1759 +    public void testThenCombine_exceptionalCompletion() throws Throwable {
1760 +        for (ExecutionMode m : ExecutionMode.values())
1761 +        for (boolean fFirst : new boolean[] { true, false })
1762 +        for (boolean failFirst : new boolean[] { true, false })
1763 +        for (Integer v1 : new Integer[] { 1, null })
1764 +    {
1765 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1766 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1767 +        final CFException ex = new CFException();
1768 +        final SubtractFunction r1 = new SubtractFunction(m);
1769 +        final SubtractFunction r2 = new SubtractFunction(m);
1770 +        final SubtractFunction r3 = new SubtractFunction(m);
1771 +
1772 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1773 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1774 +        final Callable<Boolean> complete1 = failFirst ?
1775 +            () -> fst.completeExceptionally(ex) :
1776 +            () -> fst.complete(v1);
1777 +        final Callable<Boolean> complete2 = failFirst ?
1778 +            () -> snd.complete(v1) :
1779 +            () -> snd.completeExceptionally(ex);
1780 +
1781 +        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1782 +        assertTrue(complete1.call());
1783 +        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1784 +        checkIncomplete(h1);
1785 +        checkIncomplete(h2);
1786 +        assertTrue(complete2.call());
1787 +        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1788 +
1789 +        checkCompletedWithWrappedException(h1, ex);
1790 +        checkCompletedWithWrappedException(h2, ex);
1791 +        checkCompletedWithWrappedException(h3, ex);
1792 +        r1.assertNotInvoked();
1793 +        r2.assertNotInvoked();
1794 +        r3.assertNotInvoked();
1795 +        checkCompletedNormally(failFirst ? snd : fst, v1);
1796 +        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1797 +    }}
1798 +
1799 +    /**
1800 +     * thenCombine result completes exceptionally if either source cancelled
1801 +     */
1802 +    public void testThenCombine_sourceCancelled() throws Throwable {
1803 +        for (ExecutionMode m : ExecutionMode.values())
1804 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1805 +        for (boolean fFirst : new boolean[] { true, false })
1806 +        for (boolean failFirst : new boolean[] { true, false })
1807 +        for (Integer v1 : new Integer[] { 1, null })
1808 +    {
1809 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1810 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1811 +        final SubtractFunction r1 = new SubtractFunction(m);
1812 +        final SubtractFunction r2 = new SubtractFunction(m);
1813 +        final SubtractFunction r3 = new SubtractFunction(m);
1814 +
1815 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1816 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1817 +        final Callable<Boolean> complete1 = failFirst ?
1818 +            () -> fst.cancel(mayInterruptIfRunning) :
1819 +            () -> fst.complete(v1);
1820 +        final Callable<Boolean> complete2 = failFirst ?
1821 +            () -> snd.complete(v1) :
1822 +            () -> snd.cancel(mayInterruptIfRunning);
1823 +
1824 +        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1825 +        assertTrue(complete1.call());
1826 +        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1827 +        checkIncomplete(h1);
1828 +        checkIncomplete(h2);
1829 +        assertTrue(complete2.call());
1830 +        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1831 +
1832 +        checkCompletedWithWrappedCancellationException(h1);
1833 +        checkCompletedWithWrappedCancellationException(h2);
1834 +        checkCompletedWithWrappedCancellationException(h3);
1835 +        r1.assertNotInvoked();
1836 +        r2.assertNotInvoked();
1837 +        r3.assertNotInvoked();
1838 +        checkCompletedNormally(failFirst ? snd : fst, v1);
1839 +        checkCancelled(failFirst ? fst : snd);
1840 +    }}
1841 +
1842 +    /**
1843 +     * thenCombine result completes exceptionally if action does
1844 +     */
1845 +    public void testThenCombine_actionFailed() {
1846 +        for (ExecutionMode m : ExecutionMode.values())
1847 +        for (boolean fFirst : new boolean[] { true, false })
1848 +        for (Integer v1 : new Integer[] { 1, null })
1849 +        for (Integer v2 : new Integer[] { 2, null })
1850 +    {
1851 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1852 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1853 +        final FailingBiFunction r1 = new FailingBiFunction(m);
1854 +        final FailingBiFunction r2 = new FailingBiFunction(m);
1855 +        final FailingBiFunction r3 = new FailingBiFunction(m);
1856 +
1857 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1858 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1859 +        final Integer w1 =  fFirst ? v1 : v2;
1860 +        final Integer w2 = !fFirst ? v1 : v2;
1861 +
1862 +        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1863 +        assertTrue(fst.complete(w1));
1864 +        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1865 +        assertTrue(snd.complete(w2));
1866 +        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1867 +
1868 +        checkCompletedWithWrappedException(h1, r1.ex);
1869 +        checkCompletedWithWrappedException(h2, r2.ex);
1870 +        checkCompletedWithWrappedException(h3, r3.ex);
1871 +        r1.assertInvoked();
1872 +        r2.assertInvoked();
1873 +        r3.assertInvoked();
1874 +        checkCompletedNormally(f, v1);
1875 +        checkCompletedNormally(g, v2);
1876 +    }}
1877 +
1878 +    /**
1879 +     * thenAcceptBoth result completes normally after normal
1880 +     * completion of sources
1881 +     */
1882 +    public void testThenAcceptBoth_normalCompletion() {
1883 +        for (ExecutionMode m : ExecutionMode.values())
1884 +        for (boolean fFirst : new boolean[] { true, false })
1885 +        for (Integer v1 : new Integer[] { 1, null })
1886 +        for (Integer v2 : new Integer[] { 2, null })
1887 +    {
1888 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1889 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1890 +        final SubtractAction r1 = new SubtractAction(m);
1891 +        final SubtractAction r2 = new SubtractAction(m);
1892 +        final SubtractAction r3 = new SubtractAction(m);
1893 +
1894 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1895 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1896 +        final Integer w1 =  fFirst ? v1 : v2;
1897 +        final Integer w2 = !fFirst ? v1 : v2;
1898 +
1899 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1900 +        assertTrue(fst.complete(w1));
1901 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1902 +        checkIncomplete(h1);
1903 +        checkIncomplete(h2);
1904 +        r1.assertNotInvoked();
1905 +        r2.assertNotInvoked();
1906 +        assertTrue(snd.complete(w2));
1907 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1908 +
1909 +        checkCompletedNormally(h1, null);
1910 +        checkCompletedNormally(h2, null);
1911 +        checkCompletedNormally(h3, null);
1912 +        r1.assertValue(subtract(v1, v2));
1913 +        r2.assertValue(subtract(v1, v2));
1914 +        r3.assertValue(subtract(v1, v2));
1915 +        checkCompletedNormally(f, v1);
1916 +        checkCompletedNormally(g, v2);
1917 +    }}
1918 +
1919 +    /**
1920 +     * thenAcceptBoth result completes exceptionally after exceptional
1921 +     * completion of either source
1922 +     */
1923 +    public void testThenAcceptBoth_exceptionalCompletion() throws Throwable {
1924 +        for (ExecutionMode m : ExecutionMode.values())
1925 +        for (boolean fFirst : new boolean[] { true, false })
1926 +        for (boolean failFirst : new boolean[] { true, false })
1927 +        for (Integer v1 : new Integer[] { 1, null })
1928 +    {
1929 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1930 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1931 +        final CFException ex = new CFException();
1932 +        final SubtractAction r1 = new SubtractAction(m);
1933 +        final SubtractAction r2 = new SubtractAction(m);
1934 +        final SubtractAction r3 = new SubtractAction(m);
1935 +
1936 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1937 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1938 +        final Callable<Boolean> complete1 = failFirst ?
1939 +            () -> fst.completeExceptionally(ex) :
1940 +            () -> fst.complete(v1);
1941 +        final Callable<Boolean> complete2 = failFirst ?
1942 +            () -> snd.complete(v1) :
1943 +            () -> snd.completeExceptionally(ex);
1944 +
1945 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1946 +        assertTrue(complete1.call());
1947 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1948 +        checkIncomplete(h1);
1949 +        checkIncomplete(h2);
1950 +        assertTrue(complete2.call());
1951 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1952 +
1953 +        checkCompletedWithWrappedException(h1, ex);
1954 +        checkCompletedWithWrappedException(h2, ex);
1955 +        checkCompletedWithWrappedException(h3, ex);
1956 +        r1.assertNotInvoked();
1957 +        r2.assertNotInvoked();
1958 +        r3.assertNotInvoked();
1959 +        checkCompletedNormally(failFirst ? snd : fst, v1);
1960 +        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1961 +    }}
1962 +
1963 +    /**
1964 +     * thenAcceptBoth result completes exceptionally if either source cancelled
1965 +     */
1966 +    public void testThenAcceptBoth_sourceCancelled() throws Throwable {
1967 +        for (ExecutionMode m : ExecutionMode.values())
1968 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1969 +        for (boolean fFirst : new boolean[] { true, false })
1970 +        for (boolean failFirst : new boolean[] { true, false })
1971 +        for (Integer v1 : new Integer[] { 1, null })
1972 +    {
1973 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1974 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1975 +        final SubtractAction r1 = new SubtractAction(m);
1976 +        final SubtractAction r2 = new SubtractAction(m);
1977 +        final SubtractAction r3 = new SubtractAction(m);
1978 +
1979 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1980 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1981 +        final Callable<Boolean> complete1 = failFirst ?
1982 +            () -> fst.cancel(mayInterruptIfRunning) :
1983 +            () -> fst.complete(v1);
1984 +        final Callable<Boolean> complete2 = failFirst ?
1985 +            () -> snd.complete(v1) :
1986 +            () -> snd.cancel(mayInterruptIfRunning);
1987 +
1988 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1989 +        assertTrue(complete1.call());
1990 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1991 +        checkIncomplete(h1);
1992 +        checkIncomplete(h2);
1993 +        assertTrue(complete2.call());
1994 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1995 +
1996 +        checkCompletedWithWrappedCancellationException(h1);
1997 +        checkCompletedWithWrappedCancellationException(h2);
1998 +        checkCompletedWithWrappedCancellationException(h3);
1999 +        r1.assertNotInvoked();
2000 +        r2.assertNotInvoked();
2001 +        r3.assertNotInvoked();
2002 +        checkCompletedNormally(failFirst ? snd : fst, v1);
2003 +        checkCancelled(failFirst ? fst : snd);
2004 +    }}
2005 +
2006 +    /**
2007 +     * thenAcceptBoth result completes exceptionally if action does
2008 +     */
2009 +    public void testThenAcceptBoth_actionFailed() {
2010 +        for (ExecutionMode m : ExecutionMode.values())
2011 +        for (boolean fFirst : new boolean[] { true, false })
2012 +        for (Integer v1 : new Integer[] { 1, null })
2013 +        for (Integer v2 : new Integer[] { 2, null })
2014 +    {
2015 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2016 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2017 +        final FailingBiConsumer r1 = new FailingBiConsumer(m);
2018 +        final FailingBiConsumer r2 = new FailingBiConsumer(m);
2019 +        final FailingBiConsumer r3 = new FailingBiConsumer(m);
2020 +
2021 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2022 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2023 +        final Integer w1 =  fFirst ? v1 : v2;
2024 +        final Integer w2 = !fFirst ? v1 : v2;
2025 +
2026 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
2027 +        assertTrue(fst.complete(w1));
2028 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
2029 +        assertTrue(snd.complete(w2));
2030 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
2031 +
2032 +        checkCompletedWithWrappedException(h1, r1.ex);
2033 +        checkCompletedWithWrappedException(h2, r2.ex);
2034 +        checkCompletedWithWrappedException(h3, r3.ex);
2035 +        r1.assertInvoked();
2036 +        r2.assertInvoked();
2037 +        r3.assertInvoked();
2038 +        checkCompletedNormally(f, v1);
2039 +        checkCompletedNormally(g, v2);
2040 +    }}
2041 +
2042 +    /**
2043 +     * runAfterBoth result completes normally after normal
2044 +     * completion of sources
2045 +     */
2046 +    public void testRunAfterBoth_normalCompletion() {
2047 +        for (ExecutionMode m : ExecutionMode.values())
2048 +        for (boolean fFirst : new boolean[] { true, false })
2049 +        for (Integer v1 : new Integer[] { 1, null })
2050 +        for (Integer v2 : new Integer[] { 2, null })
2051 +    {
2052 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2053 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2054 +        final Noop r1 = new Noop(m);
2055 +        final Noop r2 = new Noop(m);
2056 +        final Noop r3 = new Noop(m);
2057 +
2058 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2059 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2060 +        final Integer w1 =  fFirst ? v1 : v2;
2061 +        final Integer w2 = !fFirst ? v1 : v2;
2062 +
2063 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2064 +        assertTrue(fst.complete(w1));
2065 +        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2066 +        checkIncomplete(h1);
2067 +        checkIncomplete(h2);
2068 +        r1.assertNotInvoked();
2069 +        r2.assertNotInvoked();
2070 +        assertTrue(snd.complete(w2));
2071 +        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2072 +
2073 +        checkCompletedNormally(h1, null);
2074 +        checkCompletedNormally(h2, null);
2075 +        checkCompletedNormally(h3, null);
2076 +        r1.assertInvoked();
2077 +        r2.assertInvoked();
2078 +        r3.assertInvoked();
2079 +        checkCompletedNormally(f, v1);
2080 +        checkCompletedNormally(g, v2);
2081 +    }}
2082 +
2083 +    /**
2084 +     * runAfterBoth result completes exceptionally after exceptional
2085 +     * completion of either source
2086 +     */
2087 +    public void testRunAfterBoth_exceptionalCompletion() throws Throwable {
2088 +        for (ExecutionMode m : ExecutionMode.values())
2089 +        for (boolean fFirst : new boolean[] { true, false })
2090 +        for (boolean failFirst : new boolean[] { true, false })
2091 +        for (Integer v1 : new Integer[] { 1, null })
2092 +    {
2093 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2094 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2095 +        final CFException ex = new CFException();
2096 +        final Noop r1 = new Noop(m);
2097 +        final Noop r2 = new Noop(m);
2098 +        final Noop r3 = new Noop(m);
2099 +
2100 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2101 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2102 +        final Callable<Boolean> complete1 = failFirst ?
2103 +            () -> fst.completeExceptionally(ex) :
2104 +            () -> fst.complete(v1);
2105 +        final Callable<Boolean> complete2 = failFirst ?
2106 +            () -> snd.complete(v1) :
2107 +            () -> snd.completeExceptionally(ex);
2108 +
2109 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2110 +        assertTrue(complete1.call());
2111 +        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2112 +        checkIncomplete(h1);
2113 +        checkIncomplete(h2);
2114 +        assertTrue(complete2.call());
2115 +        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2116 +
2117 +        checkCompletedWithWrappedException(h1, ex);
2118 +        checkCompletedWithWrappedException(h2, ex);
2119 +        checkCompletedWithWrappedException(h3, ex);
2120 +        r1.assertNotInvoked();
2121 +        r2.assertNotInvoked();
2122 +        r3.assertNotInvoked();
2123 +        checkCompletedNormally(failFirst ? snd : fst, v1);
2124 +        checkCompletedExceptionally(failFirst ? fst : snd, ex);
2125 +    }}
2126 +
2127 +    /**
2128 +     * runAfterBoth result completes exceptionally if either source cancelled
2129 +     */
2130 +    public void testRunAfterBoth_sourceCancelled() throws Throwable {
2131 +        for (ExecutionMode m : ExecutionMode.values())
2132 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2133 +        for (boolean fFirst : new boolean[] { true, false })
2134 +        for (boolean failFirst : new boolean[] { true, false })
2135 +        for (Integer v1 : new Integer[] { 1, null })
2136 +    {
2137 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2138 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2139 +        final Noop r1 = new Noop(m);
2140 +        final Noop r2 = new Noop(m);
2141 +        final Noop r3 = new Noop(m);
2142 +
2143 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2144 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2145 +        final Callable<Boolean> complete1 = failFirst ?
2146 +            () -> fst.cancel(mayInterruptIfRunning) :
2147 +            () -> fst.complete(v1);
2148 +        final Callable<Boolean> complete2 = failFirst ?
2149 +            () -> snd.complete(v1) :
2150 +            () -> snd.cancel(mayInterruptIfRunning);
2151 +
2152 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2153 +        assertTrue(complete1.call());
2154 +        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2155 +        checkIncomplete(h1);
2156 +        checkIncomplete(h2);
2157 +        assertTrue(complete2.call());
2158 +        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2159 +
2160 +        checkCompletedWithWrappedCancellationException(h1);
2161 +        checkCompletedWithWrappedCancellationException(h2);
2162 +        checkCompletedWithWrappedCancellationException(h3);
2163 +        r1.assertNotInvoked();
2164 +        r2.assertNotInvoked();
2165 +        r3.assertNotInvoked();
2166 +        checkCompletedNormally(failFirst ? snd : fst, v1);
2167 +        checkCancelled(failFirst ? fst : snd);
2168 +    }}
2169 +
2170 +    /**
2171 +     * runAfterBoth result completes exceptionally if action does
2172 +     */
2173 +    public void testRunAfterBoth_actionFailed() {
2174 +        for (ExecutionMode m : ExecutionMode.values())
2175 +        for (boolean fFirst : new boolean[] { true, false })
2176 +        for (Integer v1 : new Integer[] { 1, null })
2177 +        for (Integer v2 : new Integer[] { 2, null })
2178 +    {
2179 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2180 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2181 +        final FailingRunnable r1 = new FailingRunnable(m);
2182 +        final FailingRunnable r2 = new FailingRunnable(m);
2183 +        final FailingRunnable r3 = new FailingRunnable(m);
2184 +
2185 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2186 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2187 +        final Integer w1 =  fFirst ? v1 : v2;
2188 +        final Integer w2 = !fFirst ? v1 : v2;
2189 +
2190 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2191 +        assertTrue(fst.complete(w1));
2192 +        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2193 +        assertTrue(snd.complete(w2));
2194 +        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2195 +
2196 +        checkCompletedWithWrappedException(h1, r1.ex);
2197 +        checkCompletedWithWrappedException(h2, r2.ex);
2198 +        checkCompletedWithWrappedException(h3, r3.ex);
2199 +        r1.assertInvoked();
2200 +        r2.assertInvoked();
2201 +        r3.assertInvoked();
2202 +        checkCompletedNormally(f, v1);
2203 +        checkCompletedNormally(g, v2);
2204 +    }}
2205 +
2206 +    /**
2207 +     * applyToEither result completes normally after normal completion
2208 +     * of either source
2209 +     */
2210 +    public void testApplyToEither_normalCompletion() {
2211 +        for (ExecutionMode m : ExecutionMode.values())
2212 +        for (Integer v1 : new Integer[] { 1, null })
2213 +        for (Integer v2 : new Integer[] { 2, null })
2214 +    {
2215 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2216 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2217 +        final IncFunction[] rs = new IncFunction[6];
2218 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2219 +
2220 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2221 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2222 +        checkIncomplete(h0);
2223 +        checkIncomplete(h1);
2224 +        rs[0].assertNotInvoked();
2225 +        rs[1].assertNotInvoked();
2226 +        f.complete(v1);
2227 +        checkCompletedNormally(h0, inc(v1));
2228 +        checkCompletedNormally(h1, inc(v1));
2229 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2230 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2231 +        checkCompletedNormally(h2, inc(v1));
2232 +        checkCompletedNormally(h3, inc(v1));
2233 +        g.complete(v2);
2234 +
2235 +        // unspecified behavior - both source completions available
2236 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2237 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2238 +        rs[4].assertValue(h4.join());
2239 +        rs[5].assertValue(h5.join());
2240 +        assertTrue(Objects.equals(inc(v1), h4.join()) ||
2241 +                   Objects.equals(inc(v2), h4.join()));
2242 +        assertTrue(Objects.equals(inc(v1), h5.join()) ||
2243 +                   Objects.equals(inc(v2), h5.join()));
2244 +
2245 +        checkCompletedNormally(f, v1);
2246 +        checkCompletedNormally(g, v2);
2247 +        checkCompletedNormally(h0, inc(v1));
2248 +        checkCompletedNormally(h1, inc(v1));
2249 +        checkCompletedNormally(h2, inc(v1));
2250 +        checkCompletedNormally(h3, inc(v1));
2251 +        for (int i = 0; i < 4; i++) rs[i].assertValue(inc(v1));
2252 +    }}
2253 +
2254 +    /**
2255 +     * applyToEither result completes exceptionally after exceptional
2256 +     * completion of either source
2257 +     */
2258 +    public void testApplyToEither_exceptionalCompletion() {
2259 +        for (ExecutionMode m : ExecutionMode.values())
2260 +        for (Integer v1 : new Integer[] { 1, null })
2261 +    {
2262 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2263 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2264 +        final CFException ex = new CFException();
2265 +        final IncFunction[] rs = new IncFunction[6];
2266 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2267 +
2268 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2269 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2270 +        checkIncomplete(h0);
2271 +        checkIncomplete(h1);
2272 +        rs[0].assertNotInvoked();
2273 +        rs[1].assertNotInvoked();
2274 +        f.completeExceptionally(ex);
2275 +        checkCompletedWithWrappedException(h0, ex);
2276 +        checkCompletedWithWrappedException(h1, ex);
2277 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2278 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2279 +        checkCompletedWithWrappedException(h2, ex);
2280 +        checkCompletedWithWrappedException(h3, ex);
2281 +        g.complete(v1);
2282 +
2283 +        // unspecified behavior - both source completions available
2284 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2285 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2286 +        try {
2287 +            assertEquals(inc(v1), h4.join());
2288 +            rs[4].assertValue(inc(v1));
2289 +        } catch (CompletionException ok) {
2290 +            checkCompletedWithWrappedException(h4, ex);
2291 +            rs[4].assertNotInvoked();
2292 +        }
2293 +        try {
2294 +            assertEquals(inc(v1), h5.join());
2295 +            rs[5].assertValue(inc(v1));
2296 +        } catch (CompletionException ok) {
2297 +            checkCompletedWithWrappedException(h5, ex);
2298 +            rs[5].assertNotInvoked();
2299 +        }
2300 +
2301 +        checkCompletedExceptionally(f, ex);
2302 +        checkCompletedNormally(g, v1);
2303 +        checkCompletedWithWrappedException(h0, ex);
2304 +        checkCompletedWithWrappedException(h1, ex);
2305 +        checkCompletedWithWrappedException(h2, ex);
2306 +        checkCompletedWithWrappedException(h3, ex);
2307 +        checkCompletedWithWrappedException(h4, ex);
2308 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2309 +    }}
2310 +
2311 +    public void testApplyToEither_exceptionalCompletion2() {
2312 +        for (ExecutionMode m : ExecutionMode.values())
2313 +        for (boolean fFirst : new boolean[] { true, false })
2314 +        for (Integer v1 : new Integer[] { 1, null })
2315 +    {
2316 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2317 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2318 +        final CFException ex = new CFException();
2319 +        final IncFunction[] rs = new IncFunction[6];
2320 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2321 +
2322 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2323 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2324 +        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2325 +        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2326 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2327 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2328 +
2329 +        // unspecified behavior - both source completions available
2330 +        try {
2331 +            assertEquals(inc(v1), h0.join());
2332 +            rs[0].assertValue(inc(v1));
2333 +        } catch (CompletionException ok) {
2334 +            checkCompletedWithWrappedException(h0, ex);
2335 +            rs[0].assertNotInvoked();
2336 +        }
2337 +        try {
2338 +            assertEquals(inc(v1), h1.join());
2339 +            rs[1].assertValue(inc(v1));
2340 +        } catch (CompletionException ok) {
2341 +            checkCompletedWithWrappedException(h1, ex);
2342 +            rs[1].assertNotInvoked();
2343 +        }
2344 +        try {
2345 +            assertEquals(inc(v1), h2.join());
2346 +            rs[2].assertValue(inc(v1));
2347 +        } catch (CompletionException ok) {
2348 +            checkCompletedWithWrappedException(h2, ex);
2349 +            rs[2].assertNotInvoked();
2350 +        }
2351 +        try {
2352 +            assertEquals(inc(v1), h3.join());
2353 +            rs[3].assertValue(inc(v1));
2354 +        } catch (CompletionException ok) {
2355 +            checkCompletedWithWrappedException(h3, ex);
2356 +            rs[3].assertNotInvoked();
2357 +        }
2358 +
2359 +        checkCompletedNormally(f, v1);
2360 +        checkCompletedExceptionally(g, ex);
2361 +    }}
2362 +
2363 +    /**
2364 +     * applyToEither result completes exceptionally if either source cancelled
2365 +     */
2366 +    public void testApplyToEither_sourceCancelled() {
2367 +        for (ExecutionMode m : ExecutionMode.values())
2368 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2369 +        for (Integer v1 : new Integer[] { 1, null })
2370 +    {
2371 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2372 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2373 +        final IncFunction[] rs = new IncFunction[6];
2374 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2375 +
2376 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2377 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2378 +        checkIncomplete(h0);
2379 +        checkIncomplete(h1);
2380 +        rs[0].assertNotInvoked();
2381 +        rs[1].assertNotInvoked();
2382 +        f.cancel(mayInterruptIfRunning);
2383 +        checkCompletedWithWrappedCancellationException(h0);
2384 +        checkCompletedWithWrappedCancellationException(h1);
2385 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2386 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2387 +        checkCompletedWithWrappedCancellationException(h2);
2388 +        checkCompletedWithWrappedCancellationException(h3);
2389 +        g.complete(v1);
2390 +
2391 +        // unspecified behavior - both source completions available
2392 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2393 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2394 +        try {
2395 +            assertEquals(inc(v1), h4.join());
2396 +            rs[4].assertValue(inc(v1));
2397 +        } catch (CompletionException ok) {
2398 +            checkCompletedWithWrappedCancellationException(h4);
2399 +            rs[4].assertNotInvoked();
2400 +        }
2401 +        try {
2402 +            assertEquals(inc(v1), h5.join());
2403 +            rs[5].assertValue(inc(v1));
2404 +        } catch (CompletionException ok) {
2405 +            checkCompletedWithWrappedCancellationException(h5);
2406 +            rs[5].assertNotInvoked();
2407 +        }
2408 +
2409 +        checkCancelled(f);
2410 +        checkCompletedNormally(g, v1);
2411 +        checkCompletedWithWrappedCancellationException(h0);
2412 +        checkCompletedWithWrappedCancellationException(h1);
2413 +        checkCompletedWithWrappedCancellationException(h2);
2414 +        checkCompletedWithWrappedCancellationException(h3);
2415 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2416 +    }}
2417 +
2418 +    public void testApplyToEither_sourceCancelled2() {
2419 +        for (ExecutionMode m : ExecutionMode.values())
2420 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2421 +        for (boolean fFirst : new boolean[] { true, false })
2422 +        for (Integer v1 : new Integer[] { 1, null })
2423 +    {
2424 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2425 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2426 +        final IncFunction[] rs = new IncFunction[6];
2427 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2428 +
2429 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2430 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2431 +        assertTrue(fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2432 +        assertTrue(!fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2433 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2434 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2435 +
2436 +        // unspecified behavior - both source completions available
2437 +        try {
2438 +            assertEquals(inc(v1), h0.join());
2439 +            rs[0].assertValue(inc(v1));
2440 +        } catch (CompletionException ok) {
2441 +            checkCompletedWithWrappedCancellationException(h0);
2442 +            rs[0].assertNotInvoked();
2443 +        }
2444 +        try {
2445 +            assertEquals(inc(v1), h1.join());
2446 +            rs[1].assertValue(inc(v1));
2447 +        } catch (CompletionException ok) {
2448 +            checkCompletedWithWrappedCancellationException(h1);
2449 +            rs[1].assertNotInvoked();
2450 +        }
2451 +        try {
2452 +            assertEquals(inc(v1), h2.join());
2453 +            rs[2].assertValue(inc(v1));
2454 +        } catch (CompletionException ok) {
2455 +            checkCompletedWithWrappedCancellationException(h2);
2456 +            rs[2].assertNotInvoked();
2457 +        }
2458 +        try {
2459 +            assertEquals(inc(v1), h3.join());
2460 +            rs[3].assertValue(inc(v1));
2461 +        } catch (CompletionException ok) {
2462 +            checkCompletedWithWrappedCancellationException(h3);
2463 +            rs[3].assertNotInvoked();
2464 +        }
2465 +
2466 +        checkCompletedNormally(f, v1);
2467 +        checkCancelled(g);
2468 +    }}
2469 +
2470 +    /**
2471 +     * applyToEither result completes exceptionally if action does
2472 +     */
2473 +    public void testApplyToEither_actionFailed() {
2474 +        for (ExecutionMode m : ExecutionMode.values())
2475 +        for (Integer v1 : new Integer[] { 1, null })
2476 +        for (Integer v2 : new Integer[] { 2, null })
2477 +    {
2478 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2479 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2480 +        final FailingFunction[] rs = new FailingFunction[6];
2481 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
2482 +
2483 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2484 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2485 +        f.complete(v1);
2486 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2487 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2488 +        checkCompletedWithWrappedException(h0, rs[0].ex);
2489 +        checkCompletedWithWrappedException(h1, rs[1].ex);
2490 +        checkCompletedWithWrappedException(h2, rs[2].ex);
2491 +        checkCompletedWithWrappedException(h3, rs[3].ex);
2492 +        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2493 +
2494 +        g.complete(v2);
2495 +
2496 +        // unspecified behavior - both source completions available
2497 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2498 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2499 +
2500 +        checkCompletedWithWrappedException(h4, rs[4].ex);
2501 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2502 +                   Objects.equals(v2, rs[4].value));
2503 +        checkCompletedWithWrappedException(h5, rs[5].ex);
2504 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2505 +                   Objects.equals(v2, rs[5].value));
2506 +
2507 +        checkCompletedNormally(f, v1);
2508 +        checkCompletedNormally(g, v2);
2509 +    }}
2510 +
2511 +    /**
2512 +     * acceptEither result completes normally after normal completion
2513 +     * of either source
2514 +     */
2515 +    public void testAcceptEither_normalCompletion() {
2516 +        for (ExecutionMode m : ExecutionMode.values())
2517 +        for (Integer v1 : new Integer[] { 1, null })
2518 +        for (Integer v2 : new Integer[] { 2, null })
2519 +    {
2520 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2521 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2522 +        final NoopConsumer[] rs = new NoopConsumer[6];
2523 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2524 +
2525 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2526 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2527 +        checkIncomplete(h0);
2528 +        checkIncomplete(h1);
2529 +        rs[0].assertNotInvoked();
2530 +        rs[1].assertNotInvoked();
2531 +        f.complete(v1);
2532 +        checkCompletedNormally(h0, null);
2533 +        checkCompletedNormally(h1, null);
2534 +        rs[0].assertValue(v1);
2535 +        rs[1].assertValue(v1);
2536 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2537 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2538 +        checkCompletedNormally(h2, null);
2539 +        checkCompletedNormally(h3, null);
2540 +        rs[2].assertValue(v1);
2541 +        rs[3].assertValue(v1);
2542 +        g.complete(v2);
2543 +
2544 +        // unspecified behavior - both source completions available
2545 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2546 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2547 +        checkCompletedNormally(h4, null);
2548 +        checkCompletedNormally(h5, null);
2549 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2550 +                   Objects.equals(v2, rs[4].value));
2551 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2552 +                   Objects.equals(v2, rs[5].value));
2553 +
2554 +        checkCompletedNormally(f, v1);
2555 +        checkCompletedNormally(g, v2);
2556 +        checkCompletedNormally(h0, null);
2557 +        checkCompletedNormally(h1, null);
2558 +        checkCompletedNormally(h2, null);
2559 +        checkCompletedNormally(h3, null);
2560 +        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2561 +    }}
2562 +
2563 +    /**
2564 +     * acceptEither result completes exceptionally after exceptional
2565 +     * completion of either source
2566 +     */
2567 +    public void testAcceptEither_exceptionalCompletion() {
2568 +        for (ExecutionMode m : ExecutionMode.values())
2569 +        for (Integer v1 : new Integer[] { 1, null })
2570 +    {
2571 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2572 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2573 +        final CFException ex = new CFException();
2574 +        final NoopConsumer[] rs = new NoopConsumer[6];
2575 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2576 +
2577 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2578 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2579 +        checkIncomplete(h0);
2580 +        checkIncomplete(h1);
2581 +        rs[0].assertNotInvoked();
2582 +        rs[1].assertNotInvoked();
2583 +        f.completeExceptionally(ex);
2584 +        checkCompletedWithWrappedException(h0, ex);
2585 +        checkCompletedWithWrappedException(h1, ex);
2586 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2587 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2588 +        checkCompletedWithWrappedException(h2, ex);
2589 +        checkCompletedWithWrappedException(h3, ex);
2590 +
2591 +        g.complete(v1);
2592 +
2593 +        // unspecified behavior - both source completions available
2594 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2595 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2596 +        try {
2597 +            assertNull(h4.join());
2598 +            rs[4].assertValue(v1);
2599 +        } catch (CompletionException ok) {
2600 +            checkCompletedWithWrappedException(h4, ex);
2601 +            rs[4].assertNotInvoked();
2602 +        }
2603 +        try {
2604 +            assertNull(h5.join());
2605 +            rs[5].assertValue(v1);
2606 +        } catch (CompletionException ok) {
2607 +            checkCompletedWithWrappedException(h5, ex);
2608 +            rs[5].assertNotInvoked();
2609 +        }
2610 +
2611 +        checkCompletedExceptionally(f, ex);
2612 +        checkCompletedNormally(g, v1);
2613 +        checkCompletedWithWrappedException(h0, ex);
2614 +        checkCompletedWithWrappedException(h1, ex);
2615 +        checkCompletedWithWrappedException(h2, ex);
2616 +        checkCompletedWithWrappedException(h3, ex);
2617 +        checkCompletedWithWrappedException(h4, ex);
2618 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2619 +    }}
2620 +
2621 +    public void testAcceptEither_exceptionalCompletion2() {
2622 +        for (ExecutionMode m : ExecutionMode.values())
2623 +        for (boolean fFirst : new boolean[] { true, false })
2624 +        for (Integer v1 : new Integer[] { 1, null })
2625 +    {
2626 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2627 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2628 +        final CFException ex = new CFException();
2629 +        final NoopConsumer[] rs = new NoopConsumer[6];
2630 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2631 +
2632 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2633 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2634 +        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2635 +        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2636 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2637 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2638 +
2639 +        // unspecified behavior - both source completions available
2640 +        try {
2641 +            assertNull(h0.join());
2642 +            rs[0].assertValue(v1);
2643 +        } catch (CompletionException ok) {
2644 +            checkCompletedWithWrappedException(h0, ex);
2645 +            rs[0].assertNotInvoked();
2646 +        }
2647 +        try {
2648 +            assertNull(h1.join());
2649 +            rs[1].assertValue(v1);
2650 +        } catch (CompletionException ok) {
2651 +            checkCompletedWithWrappedException(h1, ex);
2652 +            rs[1].assertNotInvoked();
2653 +        }
2654 +        try {
2655 +            assertNull(h2.join());
2656 +            rs[2].assertValue(v1);
2657 +        } catch (CompletionException ok) {
2658 +            checkCompletedWithWrappedException(h2, ex);
2659 +            rs[2].assertNotInvoked();
2660 +        }
2661 +        try {
2662 +            assertNull(h3.join());
2663 +            rs[3].assertValue(v1);
2664 +        } catch (CompletionException ok) {
2665 +            checkCompletedWithWrappedException(h3, ex);
2666 +            rs[3].assertNotInvoked();
2667 +        }
2668 +
2669 +        checkCompletedNormally(f, v1);
2670 +        checkCompletedExceptionally(g, ex);
2671 +    }}
2672 +
2673 +    /**
2674 +     * acceptEither result completes exceptionally if either source cancelled
2675 +     */
2676 +    public void testAcceptEither_sourceCancelled() {
2677 +        for (ExecutionMode m : ExecutionMode.values())
2678 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2679 +        for (Integer v1 : new Integer[] { 1, null })
2680 +    {
2681 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2682 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2683 +        final NoopConsumer[] rs = new NoopConsumer[6];
2684 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2685 +
2686 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2687 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2688 +        checkIncomplete(h0);
2689 +        checkIncomplete(h1);
2690 +        rs[0].assertNotInvoked();
2691 +        rs[1].assertNotInvoked();
2692 +        f.cancel(mayInterruptIfRunning);
2693 +        checkCompletedWithWrappedCancellationException(h0);
2694 +        checkCompletedWithWrappedCancellationException(h1);
2695 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2696 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2697 +        checkCompletedWithWrappedCancellationException(h2);
2698 +        checkCompletedWithWrappedCancellationException(h3);
2699 +
2700 +        g.complete(v1);
2701 +
2702 +        // unspecified behavior - both source completions available
2703 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2704 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2705 +        try {
2706 +            assertNull(h4.join());
2707 +            rs[4].assertValue(v1);
2708 +        } catch (CompletionException ok) {
2709 +            checkCompletedWithWrappedCancellationException(h4);
2710 +            rs[4].assertNotInvoked();
2711 +        }
2712 +        try {
2713 +            assertNull(h5.join());
2714 +            rs[5].assertValue(v1);
2715 +        } catch (CompletionException ok) {
2716 +            checkCompletedWithWrappedCancellationException(h5);
2717 +            rs[5].assertNotInvoked();
2718 +        }
2719 +
2720 +        checkCancelled(f);
2721 +        checkCompletedNormally(g, v1);
2722 +        checkCompletedWithWrappedCancellationException(h0);
2723 +        checkCompletedWithWrappedCancellationException(h1);
2724 +        checkCompletedWithWrappedCancellationException(h2);
2725 +        checkCompletedWithWrappedCancellationException(h3);
2726 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2727 +    }}
2728 +
2729 +    /**
2730 +     * acceptEither result completes exceptionally if action does
2731 +     */
2732 +    public void testAcceptEither_actionFailed() {
2733 +        for (ExecutionMode m : ExecutionMode.values())
2734 +        for (Integer v1 : new Integer[] { 1, null })
2735 +        for (Integer v2 : new Integer[] { 2, null })
2736 +    {
2737 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2738 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2739 +        final FailingConsumer[] rs = new FailingConsumer[6];
2740 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
2741 +
2742 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2743 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2744 +        f.complete(v1);
2745 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2746 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2747 +        checkCompletedWithWrappedException(h0, rs[0].ex);
2748 +        checkCompletedWithWrappedException(h1, rs[1].ex);
2749 +        checkCompletedWithWrappedException(h2, rs[2].ex);
2750 +        checkCompletedWithWrappedException(h3, rs[3].ex);
2751 +        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2752 +
2753 +        g.complete(v2);
2754 +
2755 +        // unspecified behavior - both source completions available
2756 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2757 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2758 +
2759 +        checkCompletedWithWrappedException(h4, rs[4].ex);
2760 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2761 +                   Objects.equals(v2, rs[4].value));
2762 +        checkCompletedWithWrappedException(h5, rs[5].ex);
2763 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2764 +                   Objects.equals(v2, rs[5].value));
2765 +
2766 +        checkCompletedNormally(f, v1);
2767 +        checkCompletedNormally(g, v2);
2768 +    }}
2769 +
2770 +    /**
2771 +     * runAfterEither result completes normally after normal completion
2772 +     * of either source
2773 +     */
2774 +    public void testRunAfterEither_normalCompletion() {
2775 +        for (ExecutionMode m : ExecutionMode.values())
2776 +        for (Integer v1 : new Integer[] { 1, null })
2777 +        for (Integer v2 : new Integer[] { 2, null })
2778 +        for (boolean pushNop : new boolean[] { true, false })
2779 +    {
2780 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2781 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2782 +        final Noop[] rs = new Noop[6];
2783 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2784 +
2785 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2786 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2787 +        checkIncomplete(h0);
2788 +        checkIncomplete(h1);
2789 +        rs[0].assertNotInvoked();
2790 +        rs[1].assertNotInvoked();
2791 +        if (pushNop) {          // ad hoc test of intra-completion interference
2792 +            m.thenRun(f, () -> {});
2793 +            m.thenRun(g, () -> {});
2794 +        }
2795 +        f.complete(v1);
2796 +        checkCompletedNormally(h0, null);
2797 +        checkCompletedNormally(h1, null);
2798 +        rs[0].assertInvoked();
2799 +        rs[1].assertInvoked();
2800 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2801 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2802 +        checkCompletedNormally(h2, null);
2803 +        checkCompletedNormally(h3, null);
2804 +        rs[2].assertInvoked();
2805 +        rs[3].assertInvoked();
2806 +
2807 +        g.complete(v2);
2808 +
2809 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2810 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2811 +
2812 +        checkCompletedNormally(f, v1);
2813 +        checkCompletedNormally(g, v2);
2814 +        checkCompletedNormally(h0, null);
2815 +        checkCompletedNormally(h1, null);
2816 +        checkCompletedNormally(h2, null);
2817 +        checkCompletedNormally(h3, null);
2818 +        checkCompletedNormally(h4, null);
2819 +        checkCompletedNormally(h5, null);
2820 +        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2821 +    }}
2822 +
2823 +    /**
2824 +     * runAfterEither result completes exceptionally after exceptional
2825 +     * completion of either source
2826 +     */
2827 +    public void testRunAfterEither_exceptionalCompletion() {
2828 +        for (ExecutionMode m : ExecutionMode.values())
2829 +        for (Integer v1 : new Integer[] { 1, null })
2830 +    {
2831 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2832 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2833 +        final CFException ex = new CFException();
2834 +        final Noop[] rs = new Noop[6];
2835 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2836 +
2837 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2838 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2839 +        checkIncomplete(h0);
2840 +        checkIncomplete(h1);
2841 +        rs[0].assertNotInvoked();
2842 +        rs[1].assertNotInvoked();
2843 +        assertTrue(f.completeExceptionally(ex));
2844 +        checkCompletedWithWrappedException(h0, ex);
2845 +        checkCompletedWithWrappedException(h1, ex);
2846 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2847 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2848 +        checkCompletedWithWrappedException(h2, ex);
2849 +        checkCompletedWithWrappedException(h3, ex);
2850 +
2851 +        assertTrue(g.complete(v1));
2852 +
2853 +        // unspecified behavior - both source completions available
2854 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2855 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2856 +        try {
2857 +            assertNull(h4.join());
2858 +            rs[4].assertInvoked();
2859 +        } catch (CompletionException ok) {
2860 +            checkCompletedWithWrappedException(h4, ex);
2861 +            rs[4].assertNotInvoked();
2862 +        }
2863 +        try {
2864 +            assertNull(h5.join());
2865 +            rs[5].assertInvoked();
2866 +        } catch (CompletionException ok) {
2867 +            checkCompletedWithWrappedException(h5, ex);
2868 +            rs[5].assertNotInvoked();
2869 +        }
2870 +
2871 +        checkCompletedExceptionally(f, ex);
2872 +        checkCompletedNormally(g, v1);
2873 +        checkCompletedWithWrappedException(h0, ex);
2874 +        checkCompletedWithWrappedException(h1, ex);
2875 +        checkCompletedWithWrappedException(h2, ex);
2876 +        checkCompletedWithWrappedException(h3, ex);
2877 +        checkCompletedWithWrappedException(h4, ex);
2878 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2879 +    }}
2880 +
2881 +    public void testRunAfterEither_exceptionalCompletion2() {
2882 +        for (ExecutionMode m : ExecutionMode.values())
2883 +        for (boolean fFirst : new boolean[] { true, false })
2884 +        for (Integer v1 : new Integer[] { 1, null })
2885 +    {
2886 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2887 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2888 +        final CFException ex = new CFException();
2889 +        final Noop[] rs = new Noop[6];
2890 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2891 +
2892 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2893 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2894 +        assertTrue( fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2895 +        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2896 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2897 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2898 +
2899 +        // unspecified behavior - both source completions available
2900 +        try {
2901 +            assertNull(h0.join());
2902 +            rs[0].assertInvoked();
2903 +        } catch (CompletionException ok) {
2904 +            checkCompletedWithWrappedException(h0, ex);
2905 +            rs[0].assertNotInvoked();
2906 +        }
2907 +        try {
2908 +            assertNull(h1.join());
2909 +            rs[1].assertInvoked();
2910 +        } catch (CompletionException ok) {
2911 +            checkCompletedWithWrappedException(h1, ex);
2912 +            rs[1].assertNotInvoked();
2913 +        }
2914 +        try {
2915 +            assertNull(h2.join());
2916 +            rs[2].assertInvoked();
2917 +        } catch (CompletionException ok) {
2918 +            checkCompletedWithWrappedException(h2, ex);
2919 +            rs[2].assertNotInvoked();
2920 +        }
2921 +        try {
2922 +            assertNull(h3.join());
2923 +            rs[3].assertInvoked();
2924 +        } catch (CompletionException ok) {
2925 +            checkCompletedWithWrappedException(h3, ex);
2926 +            rs[3].assertNotInvoked();
2927 +        }
2928 +
2929 +        checkCompletedNormally(f, v1);
2930 +        checkCompletedExceptionally(g, ex);
2931 +    }}
2932 +
2933 +    /**
2934 +     * runAfterEither result completes exceptionally if either source cancelled
2935 +     */
2936 +    public void testRunAfterEither_sourceCancelled() {
2937 +        for (ExecutionMode m : ExecutionMode.values())
2938 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2939 +        for (Integer v1 : new Integer[] { 1, null })
2940 +    {
2941 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2942 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2943 +        final Noop[] rs = new Noop[6];
2944 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2945 +
2946 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2947 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2948 +        checkIncomplete(h0);
2949 +        checkIncomplete(h1);
2950 +        rs[0].assertNotInvoked();
2951 +        rs[1].assertNotInvoked();
2952 +        f.cancel(mayInterruptIfRunning);
2953 +        checkCompletedWithWrappedCancellationException(h0);
2954 +        checkCompletedWithWrappedCancellationException(h1);
2955 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2956 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2957 +        checkCompletedWithWrappedCancellationException(h2);
2958 +        checkCompletedWithWrappedCancellationException(h3);
2959 +
2960 +        assertTrue(g.complete(v1));
2961 +
2962 +        // unspecified behavior - both source completions available
2963 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2964 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2965 +        try {
2966 +            assertNull(h4.join());
2967 +            rs[4].assertInvoked();
2968 +        } catch (CompletionException ok) {
2969 +            checkCompletedWithWrappedCancellationException(h4);
2970 +            rs[4].assertNotInvoked();
2971 +        }
2972 +        try {
2973 +            assertNull(h5.join());
2974 +            rs[5].assertInvoked();
2975 +        } catch (CompletionException ok) {
2976 +            checkCompletedWithWrappedCancellationException(h5);
2977 +            rs[5].assertNotInvoked();
2978 +        }
2979 +
2980 +        checkCancelled(f);
2981 +        checkCompletedNormally(g, v1);
2982 +        checkCompletedWithWrappedCancellationException(h0);
2983 +        checkCompletedWithWrappedCancellationException(h1);
2984 +        checkCompletedWithWrappedCancellationException(h2);
2985 +        checkCompletedWithWrappedCancellationException(h3);
2986 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2987 +    }}
2988 +
2989 +    /**
2990 +     * runAfterEither result completes exceptionally if action does
2991 +     */
2992 +    public void testRunAfterEither_actionFailed() {
2993 +        for (ExecutionMode m : ExecutionMode.values())
2994 +        for (Integer v1 : new Integer[] { 1, null })
2995 +        for (Integer v2 : new Integer[] { 2, null })
2996 +    {
2997 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2998 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2999 +        final FailingRunnable[] rs = new FailingRunnable[6];
3000 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
3001 +
3002 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
3003 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
3004 +        assertTrue(f.complete(v1));
3005 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
3006 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
3007 +        checkCompletedWithWrappedException(h0, rs[0].ex);
3008 +        checkCompletedWithWrappedException(h1, rs[1].ex);
3009 +        checkCompletedWithWrappedException(h2, rs[2].ex);
3010 +        checkCompletedWithWrappedException(h3, rs[3].ex);
3011 +        for (int i = 0; i < 4; i++) rs[i].assertInvoked();
3012 +        assertTrue(g.complete(v2));
3013 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
3014 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
3015 +        checkCompletedWithWrappedException(h4, rs[4].ex);
3016 +        checkCompletedWithWrappedException(h5, rs[5].ex);
3017 +
3018 +        checkCompletedNormally(f, v1);
3019 +        checkCompletedNormally(g, v2);
3020 +        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
3021 +    }}
3022 +
3023 +    /**
3024 +     * thenCompose result completes normally after normal completion of source
3025 +     */
3026 +    public void testThenCompose_normalCompletion() {
3027 +        for (ExecutionMode m : ExecutionMode.values())
3028 +        for (boolean createIncomplete : new boolean[] { true, false })
3029 +        for (Integer v1 : new Integer[] { 1, null })
3030 +    {
3031 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3032 +        final CompletableFutureInc r = new CompletableFutureInc(m);
3033 +        if (!createIncomplete) assertTrue(f.complete(v1));
3034 +        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3035 +        if (createIncomplete) assertTrue(f.complete(v1));
3036 +
3037 +        checkCompletedNormally(g, inc(v1));
3038 +        checkCompletedNormally(f, v1);
3039 +        r.assertValue(v1);
3040 +    }}
3041 +
3042 +    /**
3043 +     * thenCompose result completes exceptionally after exceptional
3044 +     * completion of source
3045 +     */
3046 +    public void testThenCompose_exceptionalCompletion() {
3047 +        for (ExecutionMode m : ExecutionMode.values())
3048 +        for (boolean createIncomplete : new boolean[] { true, false })
3049 +    {
3050 +        final CFException ex = new CFException();
3051 +        final CompletableFutureInc r = new CompletableFutureInc(m);
3052 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3053 +        if (!createIncomplete) f.completeExceptionally(ex);
3054 +        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3055 +        if (createIncomplete) f.completeExceptionally(ex);
3056 +
3057 +        checkCompletedWithWrappedException(g, ex);
3058 +        checkCompletedExceptionally(f, ex);
3059 +        r.assertNotInvoked();
3060 +    }}
3061 +
3062 +    /**
3063 +     * thenCompose result completes exceptionally if action does
3064 +     */
3065 +    public void testThenCompose_actionFailed() {
3066 +        for (ExecutionMode m : ExecutionMode.values())
3067 +        for (boolean createIncomplete : new boolean[] { true, false })
3068 +        for (Integer v1 : new Integer[] { 1, null })
3069 +    {
3070 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3071 +        final FailingCompletableFutureFunction r
3072 +            = new FailingCompletableFutureFunction(m);
3073 +        if (!createIncomplete) assertTrue(f.complete(v1));
3074 +        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3075 +        if (createIncomplete) assertTrue(f.complete(v1));
3076 +
3077 +        checkCompletedWithWrappedException(g, r.ex);
3078 +        checkCompletedNormally(f, v1);
3079 +    }}
3080 +
3081 +    /**
3082 +     * thenCompose result completes exceptionally if source cancelled
3083 +     */
3084 +    public void testThenCompose_sourceCancelled() {
3085 +        for (ExecutionMode m : ExecutionMode.values())
3086 +        for (boolean createIncomplete : new boolean[] { true, false })
3087 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3088 +    {
3089 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3090 +        final CompletableFutureInc r = new CompletableFutureInc(m);
3091 +        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
3092 +        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3093 +        if (createIncomplete) {
3094 +            checkIncomplete(g);
3095 +            assertTrue(f.cancel(mayInterruptIfRunning));
3096 +        }
3097 +
3098 +        checkCompletedWithWrappedCancellationException(g);
3099 +        checkCancelled(f);
3100 +    }}
3101 +
3102 +    /**
3103 +     * thenCompose result completes exceptionally if the result of the action does
3104 +     */
3105 +    public void testThenCompose_actionReturnsFailingFuture() {
3106 +        for (ExecutionMode m : ExecutionMode.values())
3107 +        for (int order = 0; order < 6; order++)
3108 +        for (Integer v1 : new Integer[] { 1, null })
3109 +    {
3110 +        final CFException ex = new CFException();
3111 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3112 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
3113 +        final CompletableFuture<Integer> h;
3114 +        // Test all permutations of orders
3115 +        switch (order) {
3116 +        case 0:
3117 +            assertTrue(f.complete(v1));
3118 +            assertTrue(g.completeExceptionally(ex));
3119 +            h = m.thenCompose(f, (x -> g));
3120 +            break;
3121 +        case 1:
3122 +            assertTrue(f.complete(v1));
3123 +            h = m.thenCompose(f, (x -> g));
3124 +            assertTrue(g.completeExceptionally(ex));
3125 +            break;
3126 +        case 2:
3127 +            assertTrue(g.completeExceptionally(ex));
3128 +            assertTrue(f.complete(v1));
3129 +            h = m.thenCompose(f, (x -> g));
3130 +            break;
3131 +        case 3:
3132 +            assertTrue(g.completeExceptionally(ex));
3133 +            h = m.thenCompose(f, (x -> g));
3134 +            assertTrue(f.complete(v1));
3135 +            break;
3136 +        case 4:
3137 +            h = m.thenCompose(f, (x -> g));
3138 +            assertTrue(f.complete(v1));
3139 +            assertTrue(g.completeExceptionally(ex));
3140 +            break;
3141 +        case 5:
3142 +            h = m.thenCompose(f, (x -> g));
3143 +            assertTrue(f.complete(v1));
3144 +            assertTrue(g.completeExceptionally(ex));
3145 +            break;
3146 +        default: throw new AssertionError();
3147 +        }
3148 +
3149 +        checkCompletedExceptionally(g, ex);
3150 +        checkCompletedWithWrappedException(h, ex);
3151 +        checkCompletedNormally(f, v1);
3152 +    }}
3153 +
3154 +    /**
3155 +     * exceptionallyCompose result completes normally after normal
3156 +     * completion of source
3157 +     */
3158 +    public void testExceptionallyCompose_normalCompletion() {
3159 +        for (ExecutionMode m : ExecutionMode.values())
3160 +        for (boolean createIncomplete : new boolean[] { true, false })
3161 +        for (Integer v1 : new Integer[] { 1, null })
3162 +    {
3163 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3164 +        final ExceptionalCompletableFutureFunction r =
3165 +            new ExceptionalCompletableFutureFunction(m);
3166 +        if (!createIncomplete) assertTrue(f.complete(v1));
3167 +        final CompletableFuture<Integer> g = m.exceptionallyCompose(f, r);
3168 +        if (createIncomplete) assertTrue(f.complete(v1));
3169 +
3170 +        checkCompletedNormally(f, v1);
3171 +        checkCompletedNormally(g, v1);
3172 +        r.assertNotInvoked();
3173 +    }}
3174 +
3175 +    /**
3176 +     * exceptionallyCompose result completes normally after exceptional
3177 +     * completion of source
3178 +     */
3179 +    public void testExceptionallyCompose_exceptionalCompletion() {
3180 +        for (ExecutionMode m : ExecutionMode.values())
3181 +        for (boolean createIncomplete : new boolean[] { true, false })
3182 +    {
3183 +        final CFException ex = new CFException();
3184 +        final ExceptionalCompletableFutureFunction r =
3185 +            new ExceptionalCompletableFutureFunction(m);
3186 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3187 +        if (!createIncomplete) f.completeExceptionally(ex);
3188 +        final CompletableFuture<Integer> g = m.exceptionallyCompose(f, r);
3189 +        if (createIncomplete) f.completeExceptionally(ex);
3190 +
3191 +        checkCompletedExceptionally(f, ex);
3192 +        checkCompletedNormally(g, r.value);
3193 +        r.assertInvoked();
3194 +    }}
3195 +
3196 +    /**
3197 +     * exceptionallyCompose completes exceptionally on exception if action does
3198 +     */
3199 +    public void testExceptionallyCompose_actionFailed() {
3200 +        for (ExecutionMode m : ExecutionMode.values())
3201 +        for (boolean createIncomplete : new boolean[] { true, false })
3202 +        for (Integer v1 : new Integer[] { 1, null })
3203 +    {
3204 +        final CFException ex = new CFException();
3205 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3206 +        final FailingExceptionalCompletableFutureFunction r
3207 +            = new FailingExceptionalCompletableFutureFunction(m);
3208 +        if (!createIncomplete) f.completeExceptionally(ex);
3209 +        final CompletableFuture<Integer> g = m.exceptionallyCompose(f, r);
3210 +        if (createIncomplete) f.completeExceptionally(ex);
3211 +
3212 +        checkCompletedExceptionally(f, ex);
3213 +        checkCompletedWithWrappedException(g, r.ex);
3214 +        r.assertInvoked();
3215 +    }}
3216 +
3217 +    /**
3218 +     * exceptionallyCompose result completes exceptionally if the
3219 +     * result of the action does
3220 +     */
3221 +    public void testExceptionallyCompose_actionReturnsFailingFuture() {
3222 +        for (ExecutionMode m : ExecutionMode.values())
3223 +        for (int order = 0; order < 6; order++)
3224 +        for (Integer v1 : new Integer[] { 1, null })
3225 +    {
3226 +        final CFException ex0 = new CFException();
3227 +        final CFException ex = new CFException();
3228 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3229 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
3230 +        final CompletableFuture<Integer> h;
3231 +        // Test all permutations of orders
3232 +        switch (order) {
3233 +        case 0:
3234 +            assertTrue(f.completeExceptionally(ex0));
3235 +            assertTrue(g.completeExceptionally(ex));
3236 +            h = m.exceptionallyCompose(f, (x -> g));
3237 +            break;
3238 +        case 1:
3239 +            assertTrue(f.completeExceptionally(ex0));
3240 +            h = m.exceptionallyCompose(f, (x -> g));
3241 +            assertTrue(g.completeExceptionally(ex));
3242 +            break;
3243 +        case 2:
3244 +            assertTrue(g.completeExceptionally(ex));
3245 +            assertTrue(f.completeExceptionally(ex0));
3246 +            h = m.exceptionallyCompose(f, (x -> g));
3247 +            break;
3248 +        case 3:
3249 +            assertTrue(g.completeExceptionally(ex));
3250 +            h = m.exceptionallyCompose(f, (x -> g));
3251 +            assertTrue(f.completeExceptionally(ex0));
3252 +            break;
3253 +        case 4:
3254 +            h = m.exceptionallyCompose(f, (x -> g));
3255 +            assertTrue(f.completeExceptionally(ex0));
3256 +            assertTrue(g.completeExceptionally(ex));
3257 +            break;
3258 +        case 5:
3259 +            h = m.exceptionallyCompose(f, (x -> g));
3260 +            assertTrue(f.completeExceptionally(ex0));
3261 +            assertTrue(g.completeExceptionally(ex));
3262 +            break;
3263 +        default: throw new AssertionError();
3264 +        }
3265 +
3266 +        checkCompletedExceptionally(g, ex);
3267 +        checkCompletedWithWrappedException(h, ex);
3268 +        checkCompletedExceptionally(f, ex0);
3269 +    }}
3270 +
3271 +    // other static methods
3272 +
3273 +    /**
3274 +     * allOf(no component futures) returns a future completed normally
3275 +     * with the value null
3276 +     */
3277 +    public void testAllOf_empty() throws Exception {
3278 +        CompletableFuture<Void> f = CompletableFuture.allOf();
3279 +        checkCompletedNormally(f, null);
3280 +    }
3281 +
3282 +    /**
3283 +     * allOf returns a future completed normally with the value null
3284 +     * when all components complete normally
3285 +     */
3286 +    public void testAllOf_normal() throws Exception {
3287 +        for (int k = 1; k < 10; k++) {
3288 +            CompletableFuture<Integer>[] fs
3289 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3290 +            for (int i = 0; i < k; i++)
3291 +                fs[i] = new CompletableFuture<>();
3292 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3293 +            for (int i = 0; i < k; i++) {
3294 +                checkIncomplete(f);
3295 +                checkIncomplete(CompletableFuture.allOf(fs));
3296 +                fs[i].complete(one);
3297 +            }
3298 +            checkCompletedNormally(f, null);
3299 +            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3300 +        }
3301 +    }
3302 +
3303 +    public void testAllOf_normal_backwards() throws Exception {
3304 +        for (int k = 1; k < 10; k++) {
3305 +            CompletableFuture<Integer>[] fs
3306 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3307 +            for (int i = 0; i < k; i++)
3308 +                fs[i] = new CompletableFuture<>();
3309 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3310 +            for (int i = k - 1; i >= 0; i--) {
3311 +                checkIncomplete(f);
3312 +                checkIncomplete(CompletableFuture.allOf(fs));
3313 +                fs[i].complete(one);
3314 +            }
3315 +            checkCompletedNormally(f, null);
3316 +            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3317 +        }
3318 +    }
3319 +
3320 +    public void testAllOf_exceptional() throws Exception {
3321 +        for (int k = 1; k < 10; k++) {
3322 +            CompletableFuture<Integer>[] fs
3323 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3324 +            CFException ex = new CFException();
3325 +            for (int i = 0; i < k; i++)
3326 +                fs[i] = new CompletableFuture<>();
3327 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3328 +            for (int i = 0; i < k; i++) {
3329 +                checkIncomplete(f);
3330 +                checkIncomplete(CompletableFuture.allOf(fs));
3331 +                if (i != k / 2) {
3332 +                    fs[i].complete(i);
3333 +                    checkCompletedNormally(fs[i], i);
3334 +                } else {
3335 +                    fs[i].completeExceptionally(ex);
3336 +                    checkCompletedExceptionally(fs[i], ex);
3337 +                }
3338 +            }
3339 +            checkCompletedWithWrappedException(f, ex);
3340 +            checkCompletedWithWrappedException(CompletableFuture.allOf(fs), ex);
3341 +        }
3342 +    }
3343 +
3344 +    /**
3345 +     * anyOf(no component futures) returns an incomplete future
3346 +     */
3347 +    public void testAnyOf_empty() throws Exception {
3348 +        for (Integer v1 : new Integer[] { 1, null })
3349 +    {
3350 +        CompletableFuture<Object> f = CompletableFuture.anyOf();
3351 +        checkIncomplete(f);
3352 +
3353 +        f.complete(v1);
3354 +        checkCompletedNormally(f, v1);
3355 +    }}
3356 +
3357 +    /**
3358 +     * anyOf returns a future completed normally with a value when
3359 +     * a component future does
3360 +     */
3361 +    public void testAnyOf_normal() throws Exception {
3362 +        for (int k = 0; k < 10; k++) {
3363 +            CompletableFuture[] fs = new CompletableFuture[k];
3364 +            for (int i = 0; i < k; i++)
3365 +                fs[i] = new CompletableFuture<>();
3366 +            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3367 +            checkIncomplete(f);
3368 +            for (int i = 0; i < k; i++) {
3369 +                fs[i].complete(i);
3370 +                checkCompletedNormally(f, 0);
3371 +                int x = (int) CompletableFuture.anyOf(fs).join();
3372 +                assertTrue(0 <= x && x <= i);
3373 +            }
3374 +        }
3375 +    }
3376 +    public void testAnyOf_normal_backwards() throws Exception {
3377 +        for (int k = 0; k < 10; k++) {
3378 +            CompletableFuture[] fs = new CompletableFuture[k];
3379 +            for (int i = 0; i < k; i++)
3380 +                fs[i] = new CompletableFuture<>();
3381 +            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3382 +            checkIncomplete(f);
3383 +            for (int i = k - 1; i >= 0; i--) {
3384 +                fs[i].complete(i);
3385 +                checkCompletedNormally(f, k - 1);
3386 +                int x = (int) CompletableFuture.anyOf(fs).join();
3387 +                assertTrue(i <= x && x <= k - 1);
3388 +            }
3389 +        }
3390 +    }
3391 +
3392 +    /**
3393 +     * anyOf result completes exceptionally when any component does.
3394 +     */
3395 +    public void testAnyOf_exceptional() throws Exception {
3396 +        for (int k = 0; k < 10; k++) {
3397 +            CompletableFuture[] fs = new CompletableFuture[k];
3398 +            CFException[] exs = new CFException[k];
3399 +            for (int i = 0; i < k; i++) {
3400 +                fs[i] = new CompletableFuture<>();
3401 +                exs[i] = new CFException();
3402 +            }
3403 +            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3404 +            checkIncomplete(f);
3405 +            for (int i = 0; i < k; i++) {
3406 +                fs[i].completeExceptionally(exs[i]);
3407 +                checkCompletedWithWrappedException(f, exs[0]);
3408 +                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3409 +            }
3410 +        }
3411 +    }
3412 +
3413 +    public void testAnyOf_exceptional_backwards() throws Exception {
3414 +        for (int k = 0; k < 10; k++) {
3415 +            CompletableFuture[] fs = new CompletableFuture[k];
3416 +            CFException[] exs = new CFException[k];
3417 +            for (int i = 0; i < k; i++) {
3418 +                fs[i] = new CompletableFuture<>();
3419 +                exs[i] = new CFException();
3420 +            }
3421 +            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3422 +            checkIncomplete(f);
3423 +            for (int i = k - 1; i >= 0; i--) {
3424 +                fs[i].completeExceptionally(exs[i]);
3425 +                checkCompletedWithWrappedException(f, exs[k - 1]);
3426 +                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3427 +            }
3428 +        }
3429 +    }
3430 +
3431 +    /**
3432 +     * Completion methods throw NullPointerException with null arguments
3433 +     */
3434 +    @SuppressWarnings("FutureReturnValueIgnored")
3435 +    public void testNPE() {
3436 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3437 +        CompletableFuture<Integer> g = new CompletableFuture<>();
3438 +        CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
3439 +        ThreadExecutor exec = new ThreadExecutor();
3440 +
3441 +        Runnable[] throwingActions = {
3442 +            () -> CompletableFuture.supplyAsync(null),
3443 +            () -> CompletableFuture.supplyAsync(null, exec),
3444 +            () -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.SYNC, 42), null),
3445 +
3446 +            () -> CompletableFuture.runAsync(null),
3447 +            () -> CompletableFuture.runAsync(null, exec),
3448 +            () -> CompletableFuture.runAsync(() -> {}, null),
3449 +
3450 +            () -> f.completeExceptionally(null),
3451 +
3452 +            () -> f.thenApply(null),
3453 +            () -> f.thenApplyAsync(null),
3454 +            () -> f.thenApplyAsync(x -> x, null),
3455 +            () -> f.thenApplyAsync(null, exec),
3456 +
3457 +            () -> f.thenAccept(null),
3458 +            () -> f.thenAcceptAsync(null),
3459 +            () -> f.thenAcceptAsync(x -> {} , null),
3460 +            () -> f.thenAcceptAsync(null, exec),
3461 +
3462 +            () -> f.thenRun(null),
3463 +            () -> f.thenRunAsync(null),
3464 +            () -> f.thenRunAsync(() -> {} , null),
3465 +            () -> f.thenRunAsync(null, exec),
3466 +
3467 +            () -> f.thenCombine(g, null),
3468 +            () -> f.thenCombineAsync(g, null),
3469 +            () -> f.thenCombineAsync(g, null, exec),
3470 +            () -> f.thenCombine(nullFuture, (x, y) -> x),
3471 +            () -> f.thenCombineAsync(nullFuture, (x, y) -> x),
3472 +            () -> f.thenCombineAsync(nullFuture, (x, y) -> x, exec),
3473 +            () -> f.thenCombineAsync(g, (x, y) -> x, null),
3474 +
3475 +            () -> f.thenAcceptBoth(g, null),
3476 +            () -> f.thenAcceptBothAsync(g, null),
3477 +            () -> f.thenAcceptBothAsync(g, null, exec),
3478 +            () -> f.thenAcceptBoth(nullFuture, (x, y) -> {}),
3479 +            () -> f.thenAcceptBothAsync(nullFuture, (x, y) -> {}),
3480 +            () -> f.thenAcceptBothAsync(nullFuture, (x, y) -> {}, exec),
3481 +            () -> f.thenAcceptBothAsync(g, (x, y) -> {}, null),
3482 +
3483 +            () -> f.runAfterBoth(g, null),
3484 +            () -> f.runAfterBothAsync(g, null),
3485 +            () -> f.runAfterBothAsync(g, null, exec),
3486 +            () -> f.runAfterBoth(nullFuture, () -> {}),
3487 +            () -> f.runAfterBothAsync(nullFuture, () -> {}),
3488 +            () -> f.runAfterBothAsync(nullFuture, () -> {}, exec),
3489 +            () -> f.runAfterBothAsync(g, () -> {}, null),
3490 +
3491 +            () -> f.applyToEither(g, null),
3492 +            () -> f.applyToEitherAsync(g, null),
3493 +            () -> f.applyToEitherAsync(g, null, exec),
3494 +            () -> f.applyToEither(nullFuture, x -> x),
3495 +            () -> f.applyToEitherAsync(nullFuture, x -> x),
3496 +            () -> f.applyToEitherAsync(nullFuture, x -> x, exec),
3497 +            () -> f.applyToEitherAsync(g, x -> x, null),
3498 +
3499 +            () -> f.acceptEither(g, null),
3500 +            () -> f.acceptEitherAsync(g, null),
3501 +            () -> f.acceptEitherAsync(g, null, exec),
3502 +            () -> f.acceptEither(nullFuture, x -> {}),
3503 +            () -> f.acceptEitherAsync(nullFuture, x -> {}),
3504 +            () -> f.acceptEitherAsync(nullFuture, x -> {}, exec),
3505 +            () -> f.acceptEitherAsync(g, x -> {}, null),
3506 +
3507 +            () -> f.runAfterEither(g, null),
3508 +            () -> f.runAfterEitherAsync(g, null),
3509 +            () -> f.runAfterEitherAsync(g, null, exec),
3510 +            () -> f.runAfterEither(nullFuture, () -> {}),
3511 +            () -> f.runAfterEitherAsync(nullFuture, () -> {}),
3512 +            () -> f.runAfterEitherAsync(nullFuture, () -> {}, exec),
3513 +            () -> f.runAfterEitherAsync(g, () -> {}, null),
3514 +
3515 +            () -> f.thenCompose(null),
3516 +            () -> f.thenComposeAsync(null),
3517 +            () -> f.thenComposeAsync(new CompletableFutureInc(ExecutionMode.EXECUTOR), null),
3518 +            () -> f.thenComposeAsync(null, exec),
3519 +
3520 +            () -> f.exceptionally(null),
3521 +
3522 +            () -> f.handle(null),
3523 +
3524 +            () -> CompletableFuture.allOf((CompletableFuture<?>)null),
3525 +            () -> CompletableFuture.allOf((CompletableFuture<?>[])null),
3526 +            () -> CompletableFuture.allOf(f, null),
3527 +            () -> CompletableFuture.allOf(null, f),
3528 +
3529 +            () -> CompletableFuture.anyOf((CompletableFuture<?>)null),
3530 +            () -> CompletableFuture.anyOf((CompletableFuture<?>[])null),
3531 +            () -> CompletableFuture.anyOf(f, null),
3532 +            () -> CompletableFuture.anyOf(null, f),
3533 +
3534 +            () -> f.obtrudeException(null),
3535 +
3536 +            () -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3537 +            () -> CompletableFuture.delayedExecutor(1L, null, exec),
3538 +            () -> CompletableFuture.delayedExecutor(1L, null),
3539 +
3540 +            () -> f.orTimeout(1L, null),
3541 +            () -> f.completeOnTimeout(42, 1L, null),
3542 +
3543 +            () -> CompletableFuture.failedFuture(null),
3544 +            () -> CompletableFuture.failedStage(null),
3545 +        };
3546 +
3547 +        assertThrows(NullPointerException.class, throwingActions);
3548 +        assertEquals(0, exec.count.get());
3549 +    }
3550 +
3551 +    /**
3552 +     * Test submissions to an executor that rejects all tasks.
3553 +     */
3554 +    public void testRejectingExecutor() {
3555 +        for (Integer v : new Integer[] { 1, null })
3556 +    {
3557 +        final CountingRejectingExecutor e = new CountingRejectingExecutor();
3558 +
3559 +        final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3560 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3561 +
3562 +        List<CompletableFuture<?>> futures = new ArrayList<>();
3563 +
3564 +        List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3565 +        srcs.add(complete);
3566 +        srcs.add(incomplete);
3567 +
3568 +        for (CompletableFuture<Integer> src : srcs) {
3569 +            List<CompletableFuture<?>> fs = new ArrayList<>();
3570 +            fs.add(src.thenRunAsync(() -> {}, e));
3571 +            fs.add(src.thenAcceptAsync(z -> {}, e));
3572 +            fs.add(src.thenApplyAsync(z -> z, e));
3573 +
3574 +            fs.add(src.thenCombineAsync(src, (x, y) -> x, e));
3575 +            fs.add(src.thenAcceptBothAsync(src, (x, y) -> {}, e));
3576 +            fs.add(src.runAfterBothAsync(src, () -> {}, e));
3577 +
3578 +            fs.add(src.applyToEitherAsync(src, z -> z, e));
3579 +            fs.add(src.acceptEitherAsync(src, z -> {}, e));
3580 +            fs.add(src.runAfterEitherAsync(src, () -> {}, e));
3581 +
3582 +            fs.add(src.thenComposeAsync(z -> null, e));
3583 +            fs.add(src.whenCompleteAsync((z, t) -> {}, e));
3584 +            fs.add(src.handleAsync((z, t) -> null, e));
3585 +
3586 +            for (CompletableFuture<?> future : fs) {
3587 +                if (src.isDone())
3588 +                    checkCompletedWithWrappedException(future, e.ex);
3589 +                else
3590 +                    checkIncomplete(future);
3591 +            }
3592 +            futures.addAll(fs);
3593 +        }
3594 +
3595 +        {
3596 +            List<CompletableFuture<?>> fs = new ArrayList<>();
3597 +
3598 +            fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3599 +            fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3600 +
3601 +            fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3602 +            fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3603 +
3604 +            fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3605 +            fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3606 +
3607 +            for (CompletableFuture<?> future : fs)
3608 +                checkIncomplete(future);
3609 +            futures.addAll(fs);
3610 +        }
3611 +
3612 +        {
3613 +            List<CompletableFuture<?>> fs = new ArrayList<>();
3614 +
3615 +            fs.add(complete.applyToEitherAsync(incomplete, z -> z, e));
3616 +            fs.add(incomplete.applyToEitherAsync(complete, z -> z, e));
3617 +
3618 +            fs.add(complete.acceptEitherAsync(incomplete, z -> {}, e));
3619 +            fs.add(incomplete.acceptEitherAsync(complete, z -> {}, e));
3620 +
3621 +            fs.add(complete.runAfterEitherAsync(incomplete, () -> {}, e));
3622 +            fs.add(incomplete.runAfterEitherAsync(complete, () -> {}, e));
3623 +
3624 +            for (CompletableFuture<?> future : fs)
3625 +                checkCompletedWithWrappedException(future, e.ex);
3626 +            futures.addAll(fs);
3627 +        }
3628 +
3629 +        incomplete.complete(v);
3630 +
3631 +        for (CompletableFuture<?> future : futures)
3632 +            checkCompletedWithWrappedException(future, e.ex);
3633 +
3634 +        assertEquals(futures.size(), e.count.get());
3635 +    }}
3636 +
3637 +    /**
3638 +     * Test submissions to an executor that rejects all tasks, but
3639 +     * should never be invoked because the dependent future is
3640 +     * explicitly completed.
3641 +     */
3642 +    public void testRejectingExecutorNeverInvoked() {
3643 +        for (Integer v : new Integer[] { 1, null })
3644 +    {
3645 +        final CountingRejectingExecutor e = new CountingRejectingExecutor();
3646 +
3647 +        final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3648 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3649 +
3650 +        List<CompletableFuture<?>> futures = new ArrayList<>();
3651 +
3652 +        List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3653 +        srcs.add(complete);
3654 +        srcs.add(incomplete);
3655 +
3656 +        List<CompletableFuture<?>> fs = new ArrayList<>();
3657 +        fs.add(incomplete.thenRunAsync(() -> {}, e));
3658 +        fs.add(incomplete.thenAcceptAsync(z -> {}, e));
3659 +        fs.add(incomplete.thenApplyAsync(z -> z, e));
3660 +
3661 +        fs.add(incomplete.thenCombineAsync(incomplete, (x, y) -> x, e));
3662 +        fs.add(incomplete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3663 +        fs.add(incomplete.runAfterBothAsync(incomplete, () -> {}, e));
3664 +
3665 +        fs.add(incomplete.applyToEitherAsync(incomplete, z -> z, e));
3666 +        fs.add(incomplete.acceptEitherAsync(incomplete, z -> {}, e));
3667 +        fs.add(incomplete.runAfterEitherAsync(incomplete, () -> {}, e));
3668 +
3669 +        fs.add(incomplete.thenComposeAsync(z -> null, e));
3670 +        fs.add(incomplete.whenCompleteAsync((z, t) -> {}, e));
3671 +        fs.add(incomplete.handleAsync((z, t) -> null, e));
3672 +
3673 +        fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3674 +        fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3675 +
3676 +        fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3677 +        fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3678 +
3679 +        fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3680 +        fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3681 +
3682 +        for (CompletableFuture<?> future : fs)
3683 +            checkIncomplete(future);
3684 +
3685 +        for (CompletableFuture<?> future : fs)
3686 +            future.complete(null);
3687 +
3688 +        incomplete.complete(v);
3689 +
3690 +        for (CompletableFuture<?> future : fs)
3691 +            checkCompletedNormally(future, null);
3692 +
3693 +        assertEquals(0, e.count.get());
3694 +    }}
3695 +
3696 +    /**
3697 +     * toCompletableFuture returns this CompletableFuture.
3698 +     */
3699 +    public void testToCompletableFuture() {
3700 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3701 +        assertSame(f, f.toCompletableFuture());
3702 +    }
3703 +
3704 +    // jdk9
3705 +
3706 +    /**
3707 +     * newIncompleteFuture returns an incomplete CompletableFuture
3708 +     */
3709 +    public void testNewIncompleteFuture() {
3710 +        for (Integer v1 : new Integer[] { 1, null })
3711 +    {
3712 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3713 +        CompletableFuture<Integer> g = f.newIncompleteFuture();
3714 +        checkIncomplete(f);
3715 +        checkIncomplete(g);
3716 +        f.complete(v1);
3717 +        checkCompletedNormally(f, v1);
3718 +        checkIncomplete(g);
3719 +        g.complete(v1);
3720 +        checkCompletedNormally(g, v1);
3721 +        assertSame(g.getClass(), CompletableFuture.class);
3722 +    }}
3723 +
3724 +    /**
3725 +     * completedStage returns a completed CompletionStage
3726 +     */
3727 +    public void testCompletedStage() {
3728 +        AtomicInteger x = new AtomicInteger(0);
3729 +        AtomicReference<Throwable> r = new AtomicReference<>();
3730 +        CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3731 +        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3732 +        assertEquals(x.get(), 1);
3733 +        assertNull(r.get());
3734 +    }
3735 +
3736 +    /**
3737 +     * defaultExecutor by default returns the commonPool if
3738 +     * it supports more than one thread.
3739 +     */
3740 +    public void testDefaultExecutor() {
3741 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3742 +        Executor e = f.defaultExecutor();
3743 +        Executor c = ForkJoinPool.commonPool();
3744 +        if (ForkJoinPool.getCommonPoolParallelism() > 1)
3745 +            assertSame(e, c);
3746 +        else
3747 +            assertNotSame(e, c);
3748 +    }
3749 +
3750 +    /**
3751 +     * failedFuture returns a CompletableFuture completed
3752 +     * exceptionally with the given Exception
3753 +     */
3754 +    public void testFailedFuture() {
3755 +        CFException ex = new CFException();
3756 +        CompletableFuture<Integer> f = CompletableFuture.failedFuture(ex);
3757 +        checkCompletedExceptionally(f, ex);
3758 +    }
3759 +
3760 +    /**
3761 +     * failedFuture(null) throws NPE
3762 +     */
3763 +    public void testFailedFuture_null() {
3764 +        try {
3765 +            CompletableFuture<Integer> f = CompletableFuture.failedFuture(null);
3766 +            shouldThrow();
3767 +        } catch (NullPointerException success) {}
3768 +    }
3769 +
3770 +    /**
3771 +     * copy returns a CompletableFuture that is completed normally,
3772 +     * with the same value, when source is.
3773 +     */
3774 +    public void testCopy_normalCompletion() {
3775 +        for (boolean createIncomplete : new boolean[] { true, false })
3776 +        for (Integer v1 : new Integer[] { 1, null })
3777 +    {
3778 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3779 +        if (!createIncomplete) assertTrue(f.complete(v1));
3780 +        CompletableFuture<Integer> g = f.copy();
3781 +        if (createIncomplete) {
3782 +            checkIncomplete(f);
3783 +            checkIncomplete(g);
3784 +            assertTrue(f.complete(v1));
3785 +        }
3786 +        checkCompletedNormally(f, v1);
3787 +        checkCompletedNormally(g, v1);
3788 +    }}
3789 +
3790 +    /**
3791 +     * copy returns a CompletableFuture that is completed exceptionally
3792 +     * when source is.
3793 +     */
3794 +    public void testCopy_exceptionalCompletion() {
3795 +        for (boolean createIncomplete : new boolean[] { true, false })
3796 +    {
3797 +        CFException ex = new CFException();
3798 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3799 +        if (!createIncomplete) f.completeExceptionally(ex);
3800 +        CompletableFuture<Integer> g = f.copy();
3801 +        if (createIncomplete) {
3802 +            checkIncomplete(f);
3803 +            checkIncomplete(g);
3804 +            f.completeExceptionally(ex);
3805 +        }
3806 +        checkCompletedExceptionally(f, ex);
3807 +        checkCompletedWithWrappedException(g, ex);
3808 +    }}
3809 +
3810 +    /**
3811 +     * Completion of a copy does not complete its source.
3812 +     */
3813 +    public void testCopy_oneWayPropagation() {
3814 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3815 +        assertTrue(f.copy().complete(1));
3816 +        assertTrue(f.copy().complete(null));
3817 +        assertTrue(f.copy().cancel(true));
3818 +        assertTrue(f.copy().cancel(false));
3819 +        assertTrue(f.copy().completeExceptionally(new CFException()));
3820 +        checkIncomplete(f);
3821 +    }
3822 +
3823 +    /**
3824 +     * minimalCompletionStage returns a CompletableFuture that is
3825 +     * completed normally, with the same value, when source is.
3826 +     */
3827 +    public void testMinimalCompletionStage() {
3828 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3829 +        CompletionStage<Integer> g = f.minimalCompletionStage();
3830 +        AtomicInteger x = new AtomicInteger(0);
3831 +        AtomicReference<Throwable> r = new AtomicReference<>();
3832 +        checkIncomplete(f);
3833 +        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3834 +        f.complete(1);
3835 +        checkCompletedNormally(f, 1);
3836 +        assertEquals(x.get(), 1);
3837 +        assertNull(r.get());
3838 +    }
3839 +
3840 +    /**
3841 +     * minimalCompletionStage returns a CompletableFuture that is
3842 +     * completed exceptionally when source is.
3843 +     */
3844 +    public void testMinimalCompletionStage2() {
3845 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3846 +        CompletionStage<Integer> g = f.minimalCompletionStage();
3847 +        AtomicInteger x = new AtomicInteger(0);
3848 +        AtomicReference<Throwable> r = new AtomicReference<>();
3849 +        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3850 +        checkIncomplete(f);
3851 +        CFException ex = new CFException();
3852 +        f.completeExceptionally(ex);
3853 +        checkCompletedExceptionally(f, ex);
3854 +        assertEquals(x.get(), 0);
3855 +        assertEquals(r.get().getCause(), ex);
3856 +    }
3857 +
3858 +    /**
3859 +     * failedStage returns a CompletionStage completed
3860 +     * exceptionally with the given Exception
3861 +     */
3862 +    public void testFailedStage() {
3863 +        CFException ex = new CFException();
3864 +        CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3865 +        AtomicInteger x = new AtomicInteger(0);
3866 +        AtomicReference<Throwable> r = new AtomicReference<>();
3867 +        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3868 +        assertEquals(x.get(), 0);
3869 +        assertEquals(r.get(), ex);
3870 +    }
3871 +
3872 +    /**
3873 +     * completeAsync completes with value of given supplier
3874 +     */
3875 +    public void testCompleteAsync() {
3876 +        for (Integer v1 : new Integer[] { 1, null })
3877 +    {
3878 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3879 +        f.completeAsync(() -> v1);
3880 +        f.join();
3881 +        checkCompletedNormally(f, v1);
3882 +    }}
3883 +
3884 +    /**
3885 +     * completeAsync completes exceptionally if given supplier throws
3886 +     */
3887 +    public void testCompleteAsync2() {
3888 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3889 +        CFException ex = new CFException();
3890 +        f.completeAsync(() -> { throw ex; });
3891 +        try {
3892 +            f.join();
3893 +            shouldThrow();
3894 +        } catch (CompletionException success) {}
3895 +        checkCompletedWithWrappedException(f, ex);
3896 +    }
3897 +
3898 +    /**
3899 +     * completeAsync with given executor completes with value of given supplier
3900 +     */
3901 +    public void testCompleteAsync3() {
3902 +        for (Integer v1 : new Integer[] { 1, null })
3903 +    {
3904 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3905 +        ThreadExecutor executor = new ThreadExecutor();
3906 +        f.completeAsync(() -> v1, executor);
3907 +        assertSame(v1, f.join());
3908 +        checkCompletedNormally(f, v1);
3909 +        assertEquals(1, executor.count.get());
3910 +    }}
3911 +
3912 +    /**
3913 +     * completeAsync with given executor completes exceptionally if
3914 +     * given supplier throws
3915 +     */
3916 +    public void testCompleteAsync4() {
3917 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3918 +        CFException ex = new CFException();
3919 +        ThreadExecutor executor = new ThreadExecutor();
3920 +        f.completeAsync(() -> { throw ex; }, executor);
3921 +        try {
3922 +            f.join();
3923 +            shouldThrow();
3924 +        } catch (CompletionException success) {}
3925 +        checkCompletedWithWrappedException(f, ex);
3926 +        assertEquals(1, executor.count.get());
3927 +    }
3928 +
3929 +    /**
3930 +     * orTimeout completes with TimeoutException if not complete
3931 +     */
3932 +    public void testOrTimeout_timesOut() {
3933 +        long timeoutMillis = timeoutMillis();
3934 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3935 +        long startTime = System.nanoTime();
3936 +        assertSame(f, f.orTimeout(timeoutMillis, MILLISECONDS));
3937 +        checkCompletedWithTimeoutException(f);
3938 +        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3939 +    }
3940 +
3941 +    /**
3942 +     * orTimeout completes normally if completed before timeout
3943 +     */
3944 +    public void testOrTimeout_completed() {
3945 +        for (Integer v1 : new Integer[] { 1, null })
3946 +    {
3947 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3948 +        CompletableFuture<Integer> g = new CompletableFuture<>();
3949 +        long startTime = System.nanoTime();
3950 +        f.complete(v1);
3951 +        assertSame(f, f.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3952 +        assertSame(g, g.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3953 +        g.complete(v1);
3954 +        checkCompletedNormally(f, v1);
3955 +        checkCompletedNormally(g, v1);
3956 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3957 +    }}
3958 +
3959 +    /**
3960 +     * completeOnTimeout completes with given value if not complete
3961 +     */
3962 +    public void testCompleteOnTimeout_timesOut() {
3963 +        testInParallel(() -> testCompleteOnTimeout_timesOut(42),
3964 +                       () -> testCompleteOnTimeout_timesOut(null));
3965 +    }
3966 +
3967 +    /**
3968 +     * completeOnTimeout completes with given value if not complete
3969 +     */
3970 +    public void testCompleteOnTimeout_timesOut(Integer v) {
3971 +        long timeoutMillis = timeoutMillis();
3972 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3973 +        long startTime = System.nanoTime();
3974 +        assertSame(f, f.completeOnTimeout(v, timeoutMillis, MILLISECONDS));
3975 +        assertSame(v, f.join());
3976 +        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3977 +        f.complete(99);         // should have no effect
3978 +        checkCompletedNormally(f, v);
3979 +    }
3980 +
3981 +    /**
3982 +     * completeOnTimeout has no effect if completed within timeout
3983 +     */
3984 +    public void testCompleteOnTimeout_completed() {
3985 +        for (Integer v1 : new Integer[] { 1, null })
3986 +    {
3987 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3988 +        CompletableFuture<Integer> g = new CompletableFuture<>();
3989 +        long startTime = System.nanoTime();
3990 +        f.complete(v1);
3991 +        assertSame(f, f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3992 +        assertSame(g, g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3993 +        g.complete(v1);
3994 +        checkCompletedNormally(f, v1);
3995 +        checkCompletedNormally(g, v1);
3996 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3997 +    }}
3998 +
3999 +    /**
4000 +     * delayedExecutor returns an executor that delays submission
4001 +     */
4002 +    public void testDelayedExecutor() {
4003 +        testInParallel(() -> testDelayedExecutor(null, null),
4004 +                       () -> testDelayedExecutor(null, 1),
4005 +                       () -> testDelayedExecutor(new ThreadExecutor(), 1),
4006 +                       () -> testDelayedExecutor(new ThreadExecutor(), 1));
4007 +    }
4008 +
4009 +    public void testDelayedExecutor(Executor executor, Integer v) throws Exception {
4010 +        long timeoutMillis = timeoutMillis();
4011 +        // Use an "unreasonably long" long timeout to catch lingering threads
4012 +        long longTimeoutMillis = 1000 * 60 * 60 * 24;
4013 +        final Executor delayer, longDelayer;
4014 +        if (executor == null) {
4015 +            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS);
4016 +            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS);
4017 +        } else {
4018 +            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS, executor);
4019 +            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS, executor);
4020 +        }
4021 +        long startTime = System.nanoTime();
4022 +        CompletableFuture<Integer> f =
4023 +            CompletableFuture.supplyAsync(() -> v, delayer);
4024 +        CompletableFuture<Integer> g =
4025 +            CompletableFuture.supplyAsync(() -> v, longDelayer);
4026 +
4027 +        assertNull(g.getNow(null));
4028 +
4029 +        assertSame(v, f.get(LONG_DELAY_MS, MILLISECONDS));
4030 +        long millisElapsed = millisElapsedSince(startTime);
4031 +        assertTrue(millisElapsed >= timeoutMillis);
4032 +        assertTrue(millisElapsed < LONG_DELAY_MS / 2);
4033 +
4034 +        checkCompletedNormally(f, v);
4035 +
4036 +        checkIncomplete(g);
4037 +        assertTrue(g.cancel(true));
4038 +    }
4039 +
4040 +    //--- tests of implementation details; not part of official tck ---
4041 +
4042 +    Object resultOf(CompletableFuture<?> f) {
4043 +        SecurityManager sm = System.getSecurityManager();
4044 +        if (sm != null) {
4045 +            try {
4046 +                System.setSecurityManager(null);
4047 +            } catch (SecurityException giveUp) {
4048 +                return "Reflection not available";
4049 +            }
4050 +        }
4051 +
4052 +        try {
4053 +            java.lang.reflect.Field resultField
4054 +                = CompletableFuture.class.getDeclaredField("result");
4055 +            resultField.setAccessible(true);
4056 +            return resultField.get(f);
4057 +        } catch (Throwable t) {
4058 +            throw new AssertionError(t);
4059 +        } finally {
4060 +            if (sm != null) System.setSecurityManager(sm);
4061 +        }
4062 +    }
4063 +
4064 +    public void testExceptionPropagationReusesResultObject() {
4065 +        if (!testImplementationDetails) return;
4066 +        for (ExecutionMode m : ExecutionMode.values())
4067 +    {
4068 +        final CFException ex = new CFException();
4069 +        final CompletableFuture<Integer> v42 = CompletableFuture.completedFuture(42);
4070 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
4071 +
4072 +        final Runnable noopRunnable = new Noop(m);
4073 +        final Consumer<Integer> noopConsumer = new NoopConsumer(m);
4074 +        final Function<Integer, Integer> incFunction = new IncFunction(m);
4075 +
4076 +        List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> funs
4077 +            = new ArrayList<>();
4078 +
4079 +        funs.add(y -> m.thenRun(y, noopRunnable));
4080 +        funs.add(y -> m.thenAccept(y, noopConsumer));
4081 +        funs.add(y -> m.thenApply(y, incFunction));
4082 +
4083 +        funs.add(y -> m.runAfterEither(y, incomplete, noopRunnable));
4084 +        funs.add(y -> m.acceptEither(y, incomplete, noopConsumer));
4085 +        funs.add(y -> m.applyToEither(y, incomplete, incFunction));
4086 +
4087 +        funs.add(y -> m.runAfterBoth(y, v42, noopRunnable));
4088 +        funs.add(y -> m.runAfterBoth(v42, y, noopRunnable));
4089 +        funs.add(y -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
4090 +        funs.add(y -> m.thenAcceptBoth(v42, y, new SubtractAction(m)));
4091 +        funs.add(y -> m.thenCombine(y, v42, new SubtractFunction(m)));
4092 +        funs.add(y -> m.thenCombine(v42, y, new SubtractFunction(m)));
4093 +
4094 +        funs.add(y -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
4095 +
4096 +        funs.add(y -> m.thenCompose(y, new CompletableFutureInc(m)));
4097 +
4098 +        funs.add(y -> CompletableFuture.allOf(y));
4099 +        funs.add(y -> CompletableFuture.allOf(y, v42));
4100 +        funs.add(y -> CompletableFuture.allOf(v42, y));
4101 +        funs.add(y -> CompletableFuture.anyOf(y));
4102 +        funs.add(y -> CompletableFuture.anyOf(y, incomplete));
4103 +        funs.add(y -> CompletableFuture.anyOf(incomplete, y));
4104 +
4105 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
4106 +                 fun : funs) {
4107 +            CompletableFuture<Integer> f = new CompletableFuture<>();
4108 +            f.completeExceptionally(ex);
4109 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
4110 +            checkCompletedWithWrappedException(src, ex);
4111 +            CompletableFuture<?> dep = fun.apply(src);
4112 +            checkCompletedWithWrappedException(dep, ex);
4113 +            assertSame(resultOf(src), resultOf(dep));
4114 +        }
4115 +
4116 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
4117 +                 fun : funs) {
4118 +            CompletableFuture<Integer> f = new CompletableFuture<>();
4119 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
4120 +            CompletableFuture<?> dep = fun.apply(src);
4121 +            f.completeExceptionally(ex);
4122 +            checkCompletedWithWrappedException(src, ex);
4123 +            checkCompletedWithWrappedException(dep, ex);
4124 +            assertSame(resultOf(src), resultOf(dep));
4125 +        }
4126 +
4127 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
4128 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
4129 +                 fun : funs) {
4130 +            CompletableFuture<Integer> f = new CompletableFuture<>();
4131 +            f.cancel(mayInterruptIfRunning);
4132 +            checkCancelled(f);
4133 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
4134 +            checkCompletedWithWrappedCancellationException(src);
4135 +            CompletableFuture<?> dep = fun.apply(src);
4136 +            checkCompletedWithWrappedCancellationException(dep);
4137 +            assertSame(resultOf(src), resultOf(dep));
4138 +        }
4139 +
4140 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
4141 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
4142 +                 fun : funs) {
4143 +            CompletableFuture<Integer> f = new CompletableFuture<>();
4144 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
4145 +            CompletableFuture<?> dep = fun.apply(src);
4146 +            f.cancel(mayInterruptIfRunning);
4147 +            checkCancelled(f);
4148 +            checkCompletedWithWrappedCancellationException(src);
4149 +            checkCompletedWithWrappedCancellationException(dep);
4150 +            assertSame(resultOf(src), resultOf(dep));
4151 +        }
4152 +    }}
4153 +
4154 +    /**
4155 +     * Minimal completion stages throw UOE for most non-CompletionStage methods
4156 +     */
4157 +    public void testMinimalCompletionStage_minimality() {
4158 +        if (!testImplementationDetails) return;
4159 +        Function<Method, String> toSignature =
4160 +            method -> method.getName() + Arrays.toString(method.getParameterTypes());
4161 +        Predicate<Method> isNotStatic =
4162 +            method -> (method.getModifiers() & Modifier.STATIC) == 0;
4163 +        List<Method> minimalMethods =
4164 +            Stream.of(Object.class, CompletionStage.class)
4165 +            .flatMap(klazz -> Stream.of(klazz.getMethods()))
4166 +            .filter(isNotStatic)
4167 +            .collect(Collectors.toList());
4168 +        // Methods from CompletableFuture permitted NOT to throw UOE
4169 +        String[] signatureWhitelist = {
4170 +            "newIncompleteFuture[]",
4171 +            "defaultExecutor[]",
4172 +            "minimalCompletionStage[]",
4173 +            "copy[]",
4174 +        };
4175 +        Set<String> permittedMethodSignatures =
4176 +            Stream.concat(minimalMethods.stream().map(toSignature),
4177 +                          Stream.of(signatureWhitelist))
4178 +            .collect(Collectors.toSet());
4179 +        List<Method> allMethods = Stream.of(CompletableFuture.class.getMethods())
4180 +            .filter(isNotStatic)
4181 +            .filter(method -> !permittedMethodSignatures.contains(toSignature.apply(method)))
4182 +            .collect(Collectors.toList());
4183 +
4184 +        List<CompletionStage<Integer>> stages = new ArrayList<>();
4185 +        CompletionStage<Integer> min =
4186 +            new CompletableFuture<Integer>().minimalCompletionStage();
4187 +        stages.add(min);
4188 +        stages.add(min.thenApply(x -> x));
4189 +        stages.add(CompletableFuture.completedStage(1));
4190 +        stages.add(CompletableFuture.failedStage(new CFException()));
4191 +
4192 +        List<Method> bugs = new ArrayList<>();
4193 +        for (Method method : allMethods) {
4194 +            Class<?>[] parameterTypes = method.getParameterTypes();
4195 +            Object[] args = new Object[parameterTypes.length];
4196 +            // Manufacture boxed primitives for primitive params
4197 +            for (int i = 0; i < args.length; i++) {
4198 +                Class<?> type = parameterTypes[i];
4199 +                if (parameterTypes[i] == boolean.class)
4200 +                    args[i] = false;
4201 +                else if (parameterTypes[i] == int.class)
4202 +                    args[i] = 0;
4203 +                else if (parameterTypes[i] == long.class)
4204 +                    args[i] = 0L;
4205 +            }
4206 +            for (CompletionStage<Integer> stage : stages) {
4207 +                try {
4208 +                    method.invoke(stage, args);
4209 +                    bugs.add(method);
4210 +                }
4211 +                catch (java.lang.reflect.InvocationTargetException expected) {
4212 +                    if (! (expected.getCause() instanceof UnsupportedOperationException)) {
4213 +                        bugs.add(method);
4214 +                        // expected.getCause().printStackTrace();
4215 +                    }
4216 +                }
4217 +                catch (ReflectiveOperationException bad) { throw new Error(bad); }
4218 +            }
4219 +        }
4220 +        if (!bugs.isEmpty())
4221 +            throw new Error("Methods did not throw UOE: " + bugs);
4222 +    }
4223 +
4224 +    /**
4225 +     * minimalStage.toCompletableFuture() returns a CompletableFuture that
4226 +     * is completed normally, with the same value, when source is.
4227 +     */
4228 +    public void testMinimalCompletionStage_toCompletableFuture_normalCompletion() {
4229 +        for (boolean createIncomplete : new boolean[] { true, false })
4230 +        for (Integer v1 : new Integer[] { 1, null })
4231 +    {
4232 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4233 +        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4234 +        if (!createIncomplete) assertTrue(f.complete(v1));
4235 +        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4236 +        if (createIncomplete) {
4237 +            checkIncomplete(f);
4238 +            checkIncomplete(g);
4239 +            assertTrue(f.complete(v1));
4240 +        }
4241 +        checkCompletedNormally(f, v1);
4242 +        checkCompletedNormally(g, v1);
4243 +    }}
4244 +
4245 +    /**
4246 +     * minimalStage.toCompletableFuture() returns a CompletableFuture that
4247 +     * is completed exceptionally when source is.
4248 +     */
4249 +    public void testMinimalCompletionStage_toCompletableFuture_exceptionalCompletion() {
4250 +        for (boolean createIncomplete : new boolean[] { true, false })
4251 +    {
4252 +        CFException ex = new CFException();
4253 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4254 +        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4255 +        if (!createIncomplete) f.completeExceptionally(ex);
4256 +        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4257 +        if (createIncomplete) {
4258 +            checkIncomplete(f);
4259 +            checkIncomplete(g);
4260 +            f.completeExceptionally(ex);
4261 +        }
4262 +        checkCompletedExceptionally(f, ex);
4263 +        checkCompletedWithWrappedException(g, ex);
4264 +    }}
4265 +
4266 +    /**
4267 +     * minimalStage.toCompletableFuture() gives mutable CompletableFuture
4268 +     */
4269 +    public void testMinimalCompletionStage_toCompletableFuture_mutable() {
4270 +        for (Integer v1 : new Integer[] { 1, null })
4271 +    {
4272 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4273 +        CompletionStage minimal = f.minimalCompletionStage();
4274 +        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4275 +        assertTrue(g.complete(v1));
4276 +        checkCompletedNormally(g, v1);
4277 +        checkIncomplete(f);
4278 +        checkIncomplete(minimal.toCompletableFuture());
4279 +    }}
4280 +
4281 +    /**
4282 +     * minimalStage.toCompletableFuture().join() awaits completion
4283 +     */
4284 +    public void testMinimalCompletionStage_toCompletableFuture_join() throws Exception {
4285 +        for (boolean createIncomplete : new boolean[] { true, false })
4286 +        for (Integer v1 : new Integer[] { 1, null })
4287 +    {
4288 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4289 +        if (!createIncomplete) assertTrue(f.complete(v1));
4290 +        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4291 +        if (createIncomplete) assertTrue(f.complete(v1));
4292 +        assertEquals(v1, minimal.toCompletableFuture().join());
4293 +        assertEquals(v1, minimal.toCompletableFuture().get());
4294 +        checkCompletedNormally(minimal.toCompletableFuture(), v1);
4295 +    }}
4296 +
4297 +    /**
4298 +     * Completion of a toCompletableFuture copy of a minimal stage
4299 +     * does not complete its source.
4300 +     */
4301 +    public void testMinimalCompletionStage_toCompletableFuture_oneWayPropagation() {
4302 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4303 +        CompletionStage<Integer> g = f.minimalCompletionStage();
4304 +        assertTrue(g.toCompletableFuture().complete(1));
4305 +        assertTrue(g.toCompletableFuture().complete(null));
4306 +        assertTrue(g.toCompletableFuture().cancel(true));
4307 +        assertTrue(g.toCompletableFuture().cancel(false));
4308 +        assertTrue(g.toCompletableFuture().completeExceptionally(new CFException()));
4309 +        checkIncomplete(g.toCompletableFuture());
4310 +        f.complete(1);
4311 +        checkCompletedNormally(g.toCompletableFuture(), 1);
4312 +    }
4313 +
4314 +    /** Demo utility method for external reliable toCompletableFuture */
4315 +    static <T> CompletableFuture<T> toCompletableFuture(CompletionStage<T> stage) {
4316 +        CompletableFuture<T> f = new CompletableFuture<>();
4317 +        stage.handle((T t, Throwable ex) -> {
4318 +                         if (ex != null) f.completeExceptionally(ex);
4319 +                         else f.complete(t);
4320 +                         return null;
4321 +                     });
4322 +        return f;
4323 +    }
4324 +
4325 +    /** Demo utility method to join a CompletionStage */
4326 +    static <T> T join(CompletionStage<T> stage) {
4327 +        return toCompletableFuture(stage).join();
4328 +    }
4329 +
4330 +    /**
4331 +     * Joining a minimal stage "by hand" works
4332 +     */
4333 +    public void testMinimalCompletionStage_join_by_hand() {
4334 +        for (boolean createIncomplete : new boolean[] { true, false })
4335 +        for (Integer v1 : new Integer[] { 1, null })
4336 +    {
4337 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4338 +        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4339 +        CompletableFuture<Integer> g = new CompletableFuture<>();
4340 +        if (!createIncomplete) assertTrue(f.complete(v1));
4341 +        minimal.thenAccept(x -> g.complete(x));
4342 +        if (createIncomplete) assertTrue(f.complete(v1));
4343 +        g.join();
4344 +        checkCompletedNormally(g, v1);
4345 +        checkCompletedNormally(f, v1);
4346 +        assertEquals(v1, join(minimal));
4347 +    }}
4348 +
4349 +    static class Monad {
4350 +        static class ZeroException extends RuntimeException {
4351 +            public ZeroException() { super("monadic zero"); }
4352 +        }
4353 +        // "return", "unit"
4354 +        static <T> CompletableFuture<T> unit(T value) {
4355 +            return completedFuture(value);
4356 +        }
4357 +        // monadic zero ?
4358 +        static <T> CompletableFuture<T> zero() {
4359 +            return failedFuture(new ZeroException());
4360 +        }
4361 +        // >=>
4362 +        static <T,U,V> Function<T, CompletableFuture<V>> compose
4363 +            (Function<T, CompletableFuture<U>> f,
4364 +             Function<U, CompletableFuture<V>> g) {
4365 +            return x -> f.apply(x).thenCompose(g);
4366 +        }
4367 +
4368 +        static void assertZero(CompletableFuture<?> f) {
4369 +            try {
4370 +                f.getNow(null);
4371 +                throw new AssertionError("should throw");
4372 +            } catch (CompletionException success) {
4373 +                assertTrue(success.getCause() instanceof ZeroException);
4374 +            }
4375 +        }
4376 +
4377 +        static <T> void assertFutureEquals(CompletableFuture<T> f,
4378 +                                           CompletableFuture<T> g) {
4379 +            T fval = null, gval = null;
4380 +            Throwable fex = null, gex = null;
4381 +
4382 +            try { fval = f.get(); }
4383 +            catch (ExecutionException ex) { fex = ex.getCause(); }
4384 +            catch (Throwable ex) { fex = ex; }
4385 +
4386 +            try { gval = g.get(); }
4387 +            catch (ExecutionException ex) { gex = ex.getCause(); }
4388 +            catch (Throwable ex) { gex = ex; }
4389 +
4390 +            if (fex != null || gex != null)
4391 +                assertSame(fex.getClass(), gex.getClass());
4392 +            else
4393 +                assertEquals(fval, gval);
4394 +        }
4395 +
4396 +        static class PlusFuture<T> extends CompletableFuture<T> {
4397 +            AtomicReference<Throwable> firstFailure = new AtomicReference<>(null);
4398 +        }
4399 +
4400 +        /** Implements "monadic plus". */
4401 +        static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f,
4402 +                                             CompletableFuture<? extends T> g) {
4403 +            PlusFuture<T> plus = new PlusFuture<T>();
4404 +            BiConsumer<T, Throwable> action = (T result, Throwable ex) -> {
4405 +                try {
4406 +                    if (ex == null) {
4407 +                        if (plus.complete(result))
4408 +                            if (plus.firstFailure.get() != null)
4409 +                                plus.firstFailure.set(null);
4410 +                    }
4411 +                    else if (plus.firstFailure.compareAndSet(null, ex)) {
4412 +                        if (plus.isDone())
4413 +                            plus.firstFailure.set(null);
4414 +                    }
4415 +                    else {
4416 +                        // first failure has precedence
4417 +                        Throwable first = plus.firstFailure.getAndSet(null);
4418 +
4419 +                        // may fail with "Self-suppression not permitted"
4420 +                        try { first.addSuppressed(ex); }
4421 +                        catch (Exception ignored) {}
4422 +
4423 +                        plus.completeExceptionally(first);
4424 +                    }
4425 +                } catch (Throwable unexpected) {
4426 +                    plus.completeExceptionally(unexpected);
4427 +                }
4428 +            };
4429 +            f.whenComplete(action);
4430 +            g.whenComplete(action);
4431 +            return plus;
4432 +        }
4433 +    }
4434 +
4435 +    /**
4436 +     * CompletableFuture is an additive monad - sort of.
4437 +     * https://en.wikipedia.org/wiki/Monad_(functional_programming)#Additive_monads
4438 +     */
4439 +    public void testAdditiveMonad() throws Throwable {
4440 +        Function<Long, CompletableFuture<Long>> unit = Monad::unit;
4441 +        CompletableFuture<Long> zero = Monad.zero();
4442 +
4443 +        // Some mutually non-commutative functions
4444 +        Function<Long, CompletableFuture<Long>> triple
4445 +            = x -> Monad.unit(3 * x);
4446 +        Function<Long, CompletableFuture<Long>> inc
4447 +            = x -> Monad.unit(x + 1);
4448 +
4449 +        // unit is a right identity: m >>= unit === m
4450 +        Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
4451 +                                 inc.apply(5L));
4452 +        // unit is a left identity: (unit x) >>= f === f x
4453 +        Monad.assertFutureEquals(unit.apply(5L).thenCompose(inc),
4454 +                                 inc.apply(5L));
4455 +
4456 +        // associativity: (m >>= f) >>= g === m >>= ( \x -> (f x >>= g) )
4457 +        Monad.assertFutureEquals(
4458 +            unit.apply(5L).thenCompose(inc).thenCompose(triple),
4459 +            unit.apply(5L).thenCompose(x -> inc.apply(x).thenCompose(triple)));
4460 +
4461 +        // The case for CompletableFuture as an additive monad is weaker...
4462 +
4463 +        // zero is a monadic zero
4464 +        Monad.assertZero(zero);
4465 +
4466 +        // left zero: zero >>= f === zero
4467 +        Monad.assertZero(zero.thenCompose(inc));
4468 +        // right zero: f >>= (\x -> zero) === zero
4469 +        Monad.assertZero(inc.apply(5L).thenCompose(x -> zero));
4470 +
4471 +        // f plus zero === f
4472 +        Monad.assertFutureEquals(Monad.unit(5L),
4473 +                                 Monad.plus(Monad.unit(5L), zero));
4474 +        // zero plus f === f
4475 +        Monad.assertFutureEquals(Monad.unit(5L),
4476 +                                 Monad.plus(zero, Monad.unit(5L)));
4477 +        // zero plus zero === zero
4478 +        Monad.assertZero(Monad.plus(zero, zero));
4479 +        {
4480 +            CompletableFuture<Long> f = Monad.plus(Monad.unit(5L),
4481 +                                                   Monad.unit(8L));
4482 +            // non-determinism
4483 +            assertTrue(f.get() == 5L || f.get() == 8L);
4484 +        }
4485 +
4486 +        CompletableFuture<Long> godot = new CompletableFuture<>();
4487 +        // f plus godot === f (doesn't wait for godot)
4488 +        Monad.assertFutureEquals(Monad.unit(5L),
4489 +                                 Monad.plus(Monad.unit(5L), godot));
4490 +        // godot plus f === f (doesn't wait for godot)
4491 +        Monad.assertFutureEquals(Monad.unit(5L),
4492 +                                 Monad.plus(godot, Monad.unit(5L)));
4493 +    }
4494 +
4495 +    /** Test long recursive chains of CompletableFutures with cascading completions */
4496 +    @SuppressWarnings("FutureReturnValueIgnored")
4497 +    public void testRecursiveChains() throws Throwable {
4498 +        for (ExecutionMode m : ExecutionMode.values())
4499 +        for (boolean addDeadEnds : new boolean[] { true, false })
4500 +    {
4501 +        final int val = 42;
4502 +        final int n = expensiveTests ? 1_000 : 2;
4503 +        CompletableFuture<Integer> head = new CompletableFuture<>();
4504 +        CompletableFuture<Integer> tail = head;
4505 +        for (int i = 0; i < n; i++) {
4506 +            if (addDeadEnds) m.thenApply(tail, v -> v + 1);
4507 +            tail = m.thenApply(tail, v -> v + 1);
4508 +            if (addDeadEnds) m.applyToEither(tail, tail, v -> v + 1);
4509 +            tail = m.applyToEither(tail, tail, v -> v + 1);
4510 +            if (addDeadEnds) m.thenCombine(tail, tail, (v, w) -> v + 1);
4511 +            tail = m.thenCombine(tail, tail, (v, w) -> v + 1);
4512 +        }
4513 +        head.complete(val);
4514 +        assertEquals(val + 3 * n, (int) tail.join());
4515 +    }}
4516 +
4517 +    /**
4518 +     * A single CompletableFuture with many dependents.
4519 +     * A demo of scalability - runtime is O(n).
4520 +     */
4521 +    @SuppressWarnings("FutureReturnValueIgnored")
4522 +    public void testManyDependents() throws Throwable {
4523 +        final int n = expensiveTests ? 1_000_000 : 10;
4524 +        final CompletableFuture<Void> head = new CompletableFuture<>();
4525 +        final CompletableFuture<Void> complete = CompletableFuture.completedFuture((Void)null);
4526 +        final AtomicInteger count = new AtomicInteger(0);
4527 +        for (int i = 0; i < n; i++) {
4528 +            head.thenRun(() -> count.getAndIncrement());
4529 +            head.thenAccept(x -> count.getAndIncrement());
4530 +            head.thenApply(x -> count.getAndIncrement());
4531 +
4532 +            head.runAfterBoth(complete, () -> count.getAndIncrement());
4533 +            head.thenAcceptBoth(complete, (x, y) -> count.getAndIncrement());
4534 +            head.thenCombine(complete, (x, y) -> count.getAndIncrement());
4535 +            complete.runAfterBoth(head, () -> count.getAndIncrement());
4536 +            complete.thenAcceptBoth(head, (x, y) -> count.getAndIncrement());
4537 +            complete.thenCombine(head, (x, y) -> count.getAndIncrement());
4538 +
4539 +            head.runAfterEither(new CompletableFuture<Void>(), () -> count.getAndIncrement());
4540 +            head.acceptEither(new CompletableFuture<Void>(), x -> count.getAndIncrement());
4541 +            head.applyToEither(new CompletableFuture<Void>(), x -> count.getAndIncrement());
4542 +            new CompletableFuture<Void>().runAfterEither(head, () -> count.getAndIncrement());
4543 +            new CompletableFuture<Void>().acceptEither(head, x -> count.getAndIncrement());
4544 +            new CompletableFuture<Void>().applyToEither(head, x -> count.getAndIncrement());
4545 +        }
4546 +        head.complete(null);
4547 +        assertEquals(5 * 3 * n, count.get());
4548 +    }
4549 +
4550 +    /** ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest tck */
4551 +    @SuppressWarnings("FutureReturnValueIgnored")
4552 +    public void testCoCompletionGarbageRetention() throws Throwable {
4553 +        final int n = expensiveTests ? 1_000_000 : 10;
4554 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
4555 +        CompletableFuture<Integer> f;
4556 +        for (int i = 0; i < n; i++) {
4557 +            f = new CompletableFuture<>();
4558 +            f.runAfterEither(incomplete, () -> {});
4559 +            f.complete(null);
4560 +
4561 +            f = new CompletableFuture<>();
4562 +            f.acceptEither(incomplete, x -> {});
4563 +            f.complete(null);
4564 +
4565 +            f = new CompletableFuture<>();
4566 +            f.applyToEither(incomplete, x -> x);
4567 +            f.complete(null);
4568 +
4569 +            f = new CompletableFuture<>();
4570 +            CompletableFuture.anyOf(f, incomplete);
4571 +            f.complete(null);
4572 +        }
4573 +
4574 +        for (int i = 0; i < n; i++) {
4575 +            f = new CompletableFuture<>();
4576 +            incomplete.runAfterEither(f, () -> {});
4577 +            f.complete(null);
4578 +
4579 +            f = new CompletableFuture<>();
4580 +            incomplete.acceptEither(f, x -> {});
4581 +            f.complete(null);
4582 +
4583 +            f = new CompletableFuture<>();
4584 +            incomplete.applyToEither(f, x -> x);
4585 +            f.complete(null);
4586 +
4587 +            f = new CompletableFuture<>();
4588 +            CompletableFuture.anyOf(incomplete, f);
4589 +            f.complete(null);
4590 +        }
4591 +    }
4592 +
4593 +    /**
4594 +     * Reproduction recipe for:
4595 +     * 8160402: Garbage retention with CompletableFuture.anyOf
4596 +     * cvs update -D '2016-05-01' ./src/main/java/util/concurrent/CompletableFuture.java && ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testAnyOfGarbageRetention tck; cvs update -A
4597 +     */
4598 +    public void testAnyOfGarbageRetention() throws Throwable {
4599 +        for (Integer v : new Integer[] { 1, null })
4600 +    {
4601 +        final int n = expensiveTests ? 100_000 : 10;
4602 +        CompletableFuture<Integer>[] fs
4603 +            = (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4604 +        for (int i = 0; i < fs.length; i++)
4605 +            fs[i] = new CompletableFuture<>();
4606 +        fs[fs.length - 1].complete(v);
4607 +        for (int i = 0; i < n; i++)
4608 +            checkCompletedNormally(CompletableFuture.anyOf(fs), v);
4609 +    }}
4610 +
4611 +    /**
4612 +     * Checks for garbage retention with allOf.
4613 +     *
4614 +     * As of 2016-07, fails with OOME:
4615 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledAllOfGarbageRetention tck
4616 +     */
4617 +    public void testCancelledAllOfGarbageRetention() throws Throwable {
4618 +        final int n = expensiveTests ? 100_000 : 10;
4619 +        CompletableFuture<Integer>[] fs
4620 +            = (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4621 +        for (int i = 0; i < fs.length; i++)
4622 +            fs[i] = new CompletableFuture<>();
4623 +        for (int i = 0; i < n; i++)
4624 +            assertTrue(CompletableFuture.allOf(fs).cancel(false));
4625 +    }
4626 +
4627 +    /**
4628 +     * Checks for garbage retention when a dependent future is
4629 +     * cancelled and garbage-collected.
4630 +     * 8161600: Garbage retention when source CompletableFutures are never completed
4631 +     *
4632 +     * As of 2016-07, fails with OOME:
4633 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledGarbageRetention tck
4634 +     */
4635 +    public void testCancelledGarbageRetention() throws Throwable {
4636 +        final int n = expensiveTests ? 100_000 : 10;
4637 +        CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4638 +        for (int i = 0; i < n; i++)
4639 +            assertTrue(neverCompleted.thenRun(() -> {}).cancel(true));
4640 +    }
4641 +
4642 +    /**
4643 +     * Checks for garbage retention when MinimalStage.toCompletableFuture()
4644 +     * is invoked many times.
4645 +     * 8161600: Garbage retention when source CompletableFutures are never completed
4646 +     *
4647 +     * As of 2016-07, fails with OOME:
4648 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testToCompletableFutureGarbageRetention tck
4649 +     */
4650 +    public void testToCompletableFutureGarbageRetention() throws Throwable {
4651 +        final int n = expensiveTests ? 900_000 : 10;
4652 +        CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4653 +        CompletionStage minimal = neverCompleted.minimalCompletionStage();
4654 +        for (int i = 0; i < n; i++)
4655 +            assertTrue(minimal.toCompletableFuture().cancel(true));
4656 +    }
4657 +
4658 + //     static <U> U join(CompletionStage<U> stage) {
4659 + //         CompletableFuture<U> f = new CompletableFuture<>();
4660 + //         stage.whenComplete((v, ex) -> {
4661 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4662 + //         });
4663 + //         return f.join();
4664 + //     }
4665 +
4666 + //     static <U> boolean isDone(CompletionStage<U> stage) {
4667 + //         CompletableFuture<U> f = new CompletableFuture<>();
4668 + //         stage.whenComplete((v, ex) -> {
4669 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4670 + //         });
4671 + //         return f.isDone();
4672 + //     }
4673 +
4674 + //     static <U> U join2(CompletionStage<U> stage) {
4675 + //         return stage.toCompletableFuture().copy().join();
4676 + //     }
4677 +
4678 + //     static <U> boolean isDone2(CompletionStage<U> stage) {
4679 + //         return stage.toCompletableFuture().copy().isDone();
4680 + //     }
4681 +
4682 +    // For testing default implementations
4683 +    // Only non-default interface methods defined.
4684 +    static final class DelegatedCompletionStage<T> implements CompletionStage<T> {
4685 +        final CompletableFuture<T> cf;
4686 +        DelegatedCompletionStage(CompletableFuture<T> cf) { this.cf = cf; }
4687 +        public CompletableFuture<T> toCompletableFuture() {
4688 +            return cf; }
4689 +        public CompletionStage<Void> thenRun
4690 +            (Runnable action) {
4691 +            return cf.thenRun(action); }
4692 +        public CompletionStage<Void> thenRunAsync
4693 +            (Runnable action) {
4694 +            return cf.thenRunAsync(action); }
4695 +        public CompletionStage<Void> thenRunAsync
4696 +            (Runnable action,
4697 +             Executor executor) {
4698 +            return cf.thenRunAsync(action, executor); }
4699 +        public CompletionStage<Void> thenAccept
4700 +            (Consumer<? super T> action) {
4701 +            return cf.thenAccept(action); }
4702 +        public CompletionStage<Void> thenAcceptAsync
4703 +            (Consumer<? super T> action) {
4704 +            return cf.thenAcceptAsync(action); }
4705 +        public CompletionStage<Void> thenAcceptAsync
4706 +            (Consumer<? super T> action,
4707 +             Executor executor) {
4708 +            return cf.thenAcceptAsync(action, executor); }
4709 +        public <U> CompletionStage<U> thenApply
4710 +            (Function<? super T,? extends U> a) {
4711 +            return cf.thenApply(a); }
4712 +        public <U> CompletionStage<U> thenApplyAsync
4713 +            (Function<? super T,? extends U> fn) {
4714 +            return cf.thenApplyAsync(fn); }
4715 +        public <U> CompletionStage<U> thenApplyAsync
4716 +            (Function<? super T,? extends U> fn,
4717 +             Executor executor) {
4718 +            return cf.thenApplyAsync(fn, executor); }
4719 +        public <U,V> CompletionStage<V> thenCombine
4720 +            (CompletionStage<? extends U> other,
4721 +             BiFunction<? super T,? super U,? extends V> fn) {
4722 +            return cf.thenCombine(other, fn); }
4723 +        public <U,V> CompletionStage<V> thenCombineAsync
4724 +            (CompletionStage<? extends U> other,
4725 +             BiFunction<? super T,? super U,? extends V> fn) {
4726 +            return cf.thenCombineAsync(other, fn); }
4727 +        public <U,V> CompletionStage<V> thenCombineAsync
4728 +            (CompletionStage<? extends U> other,
4729 +             BiFunction<? super T,? super U,? extends V> fn,
4730 +             Executor executor) {
4731 +            return cf.thenCombineAsync(other, fn, executor); }
4732 +        public <U> CompletionStage<Void> thenAcceptBoth
4733 +            (CompletionStage<? extends U> other,
4734 +             BiConsumer<? super T, ? super U> action) {
4735 +            return cf.thenAcceptBoth(other, action); }
4736 +        public <U> CompletionStage<Void> thenAcceptBothAsync
4737 +            (CompletionStage<? extends U> other,
4738 +             BiConsumer<? super T, ? super U> action) {
4739 +            return cf.thenAcceptBothAsync(other, action); }
4740 +        public <U> CompletionStage<Void> thenAcceptBothAsync
4741 +            (CompletionStage<? extends U> other,
4742 +             BiConsumer<? super T, ? super U> action,
4743 +             Executor executor) {
4744 +            return cf.thenAcceptBothAsync(other, action, executor); }
4745 +        public CompletionStage<Void> runAfterBoth
4746 +            (CompletionStage<?> other,
4747 +             Runnable action) {
4748 +            return cf.runAfterBoth(other, action); }
4749 +        public CompletionStage<Void> runAfterBothAsync
4750 +            (CompletionStage<?> other,
4751 +             Runnable action) {
4752 +            return cf.runAfterBothAsync(other, action); }
4753 +        public CompletionStage<Void> runAfterBothAsync
4754 +            (CompletionStage<?> other,
4755 +             Runnable action,
4756 +             Executor executor) {
4757 +            return cf.runAfterBothAsync(other, action, executor); }
4758 +        public <U> CompletionStage<U> applyToEither
4759 +            (CompletionStage<? extends T> other,
4760 +             Function<? super T, U> fn) {
4761 +            return cf.applyToEither(other, fn); }
4762 +        public <U> CompletionStage<U> applyToEitherAsync
4763 +            (CompletionStage<? extends T> other,
4764 +             Function<? super T, U> fn) {
4765 +            return cf.applyToEitherAsync(other, fn); }
4766 +        public <U> CompletionStage<U> applyToEitherAsync
4767 +            (CompletionStage<? extends T> other,
4768 +             Function<? super T, U> fn,
4769 +             Executor executor) {
4770 +            return cf.applyToEitherAsync(other, fn, executor); }
4771 +        public CompletionStage<Void> acceptEither
4772 +            (CompletionStage<? extends T> other,
4773 +             Consumer<? super T> action) {
4774 +            return cf.acceptEither(other, action); }
4775 +        public CompletionStage<Void> acceptEitherAsync
4776 +            (CompletionStage<? extends T> other,
4777 +             Consumer<? super T> action) {
4778 +            return cf.acceptEitherAsync(other, action); }
4779 +        public CompletionStage<Void> acceptEitherAsync
4780 +            (CompletionStage<? extends T> other,
4781 +             Consumer<? super T> action,
4782 +             Executor executor) {
4783 +            return cf.acceptEitherAsync(other, action, executor); }
4784 +        public CompletionStage<Void> runAfterEither
4785 +            (CompletionStage<?> other,
4786 +             Runnable action) {
4787 +            return cf.runAfterEither(other, action); }
4788 +        public CompletionStage<Void> runAfterEitherAsync
4789 +            (CompletionStage<?> other,
4790 +             Runnable action) {
4791 +            return cf.runAfterEitherAsync(other, action); }
4792 +        public CompletionStage<Void> runAfterEitherAsync
4793 +            (CompletionStage<?> other,
4794 +             Runnable action,
4795 +             Executor executor) {
4796 +            return cf.runAfterEitherAsync(other, action, executor); }
4797 +        public <U> CompletionStage<U> thenCompose
4798 +            (Function<? super T, ? extends CompletionStage<U>> fn) {
4799 +            return cf.thenCompose(fn); }
4800 +        public <U> CompletionStage<U> thenComposeAsync
4801 +            (Function<? super T, ? extends CompletionStage<U>> fn) {
4802 +            return cf.thenComposeAsync(fn); }
4803 +        public <U> CompletionStage<U> thenComposeAsync
4804 +            (Function<? super T, ? extends CompletionStage<U>> fn,
4805 +             Executor executor) {
4806 +            return cf.thenComposeAsync(fn, executor); }
4807 +        public <U> CompletionStage<U> handle
4808 +            (BiFunction<? super T, Throwable, ? extends U> fn) {
4809 +            return cf.handle(fn); }
4810 +        public <U> CompletionStage<U> handleAsync
4811 +            (BiFunction<? super T, Throwable, ? extends U> fn) {
4812 +            return cf.handleAsync(fn); }
4813 +        public <U> CompletionStage<U> handleAsync
4814 +            (BiFunction<? super T, Throwable, ? extends U> fn,
4815 +             Executor executor) {
4816 +            return cf.handleAsync(fn, executor); }
4817 +        public CompletionStage<T> whenComplete
4818 +            (BiConsumer<? super T, ? super Throwable> action) {
4819 +            return cf.whenComplete(action); }
4820 +        public CompletionStage<T> whenCompleteAsync
4821 +            (BiConsumer<? super T, ? super Throwable> action) {
4822 +            return cf.whenCompleteAsync(action); }
4823 +        public CompletionStage<T> whenCompleteAsync
4824 +            (BiConsumer<? super T, ? super Throwable> action,
4825 +             Executor executor) {
4826 +            return cf.whenCompleteAsync(action, executor); }
4827 +        public CompletionStage<T> exceptionally
4828 +            (Function<Throwable, ? extends T> fn) {
4829 +            return cf.exceptionally(fn); }
4830 +    }
4831 +
4832 +    /**
4833 +     * default-implemented exceptionallyAsync action is not invoked when
4834 +     * source completes normally, and source result is propagated
4835 +     */
4836 +    public void testDefaultExceptionallyAsync_normalCompletion() {
4837 +        for (boolean createIncomplete : new boolean[] { true, false })
4838 +        for (Integer v1 : new Integer[] { 1, null })
4839 +    {
4840 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4841 +        final DelegatedCompletionStage<Integer> d =
4842 +            new DelegatedCompletionStage<Integer>(f);
4843 +        if (!createIncomplete) assertTrue(f.complete(v1));
4844 +        final CompletionStage<Integer> g = d.exceptionallyAsync
4845 +            ((Throwable t) -> {
4846 +                threadFail("should not be called");
4847 +                return null;            // unreached
4848 +            });
4849 +        if (createIncomplete) assertTrue(f.complete(v1));
4850 +
4851 +        checkCompletedNormally(g.toCompletableFuture(), v1);
4852 +    }}
4853 +
4854 +    /**
4855 +     * default-implemented exceptionallyAsync action completes with
4856 +     * function value on source exception
4857 +     */
4858 +    public void testDefaultExceptionallyAsync_exceptionalCompletion() {
4859 +        for (boolean createIncomplete : new boolean[] { true, false })
4860 +        for (Integer v1 : new Integer[] { 1, null })
4861 +    {
4862 +        final AtomicInteger a = new AtomicInteger(0);
4863 +        final CFException ex = new CFException();
4864 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4865 +        final DelegatedCompletionStage<Integer> d =
4866 +            new DelegatedCompletionStage<Integer>(f);
4867 +        if (!createIncomplete) f.completeExceptionally(ex);
4868 +        final CompletionStage<Integer> g = d.exceptionallyAsync
4869 +            ((Throwable t) -> {
4870 +                threadAssertSame(t, ex);
4871 +                a.getAndIncrement();
4872 +                return v1;
4873 +            });
4874 +        if (createIncomplete) f.completeExceptionally(ex);
4875 +
4876 +        checkCompletedNormally(g.toCompletableFuture(), v1);
4877 +        assertEquals(1, a.get());
4878 +    }}
4879 +
4880 +    /**
4881 +     * Under default implementation, if an "exceptionally action"
4882 +     * throws an exception, it completes exceptionally with that
4883 +     * exception
4884 +     */
4885 +    public void testDefaultExceptionallyAsync_exceptionalCompletionActionFailed() {
4886 +        for (boolean createIncomplete : new boolean[] { true, false })
4887 +    {
4888 +        final AtomicInteger a = new AtomicInteger(0);
4889 +        final CFException ex1 = new CFException();
4890 +        final CFException ex2 = new CFException();
4891 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4892 +        final DelegatedCompletionStage<Integer> d =
4893 +            new DelegatedCompletionStage<Integer>(f);
4894 +        if (!createIncomplete) f.completeExceptionally(ex1);
4895 +        final CompletionStage<Integer> g = d.exceptionallyAsync
4896 +            ((Throwable t) -> {
4897 +                threadAssertSame(t, ex1);
4898 +                a.getAndIncrement();
4899 +                throw ex2;
4900 +            });
4901 +        if (createIncomplete) f.completeExceptionally(ex1);
4902 +
4903 +        checkCompletedWithWrappedException(g.toCompletableFuture(), ex2);
4904 +        checkCompletedExceptionally(f, ex1);
4905 +        checkCompletedExceptionally(d.toCompletableFuture(), ex1);
4906 +        assertEquals(1, a.get());
4907 +    }}
4908 +
4909 +    /**
4910 +     * default exceptionallyCompose result completes normally after normal
4911 +     * completion of source
4912 +     */
4913 +    public void testDefaultExceptionallyCompose_normalCompletion() {
4914 +        for (boolean createIncomplete : new boolean[] { true, false })
4915 +        for (Integer v1 : new Integer[] { 1, null })
4916 +    {
4917 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4918 +        final ExceptionalCompletableFutureFunction r =
4919 +            new ExceptionalCompletableFutureFunction(ExecutionMode.SYNC);
4920 +        final DelegatedCompletionStage<Integer> d =
4921 +            new DelegatedCompletionStage<Integer>(f);
4922 +        if (!createIncomplete) assertTrue(f.complete(v1));
4923 +        final CompletionStage<Integer> g = d.exceptionallyCompose(r);
4924 +        if (createIncomplete) assertTrue(f.complete(v1));
4925 +
4926 +        checkCompletedNormally(f, v1);
4927 +        checkCompletedNormally(g.toCompletableFuture(), v1);
4928 +        r.assertNotInvoked();
4929 +    }}
4930 +
4931 +    /**
4932 +     * default-implemented exceptionallyCompose result completes
4933 +     * normally after exceptional completion of source
4934 +     */
4935 +    public void testDefaultExceptionallyCompose_exceptionalCompletion() {
4936 +        for (boolean createIncomplete : new boolean[] { true, false })
4937 +    {
4938 +        final CFException ex = new CFException();
4939 +        final ExceptionalCompletableFutureFunction r =
4940 +            new ExceptionalCompletableFutureFunction(ExecutionMode.SYNC);
4941 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4942 +        final DelegatedCompletionStage<Integer> d =
4943 +            new DelegatedCompletionStage<Integer>(f);
4944 +        if (!createIncomplete) f.completeExceptionally(ex);
4945 +        final CompletionStage<Integer> g = d.exceptionallyCompose(r);
4946 +        if (createIncomplete) f.completeExceptionally(ex);
4947 +
4948 +        checkCompletedExceptionally(f, ex);
4949 +        checkCompletedNormally(g.toCompletableFuture(), r.value);
4950 +        r.assertInvoked();
4951 +    }}
4952 +
4953 +    /**
4954 +     * default-implemented exceptionallyCompose completes
4955 +     * exceptionally on exception if action does
4956 +     */
4957 +    public void testDefaultExceptionallyCompose_actionFailed() {
4958 +        for (boolean createIncomplete : new boolean[] { true, false })
4959 +        for (Integer v1 : new Integer[] { 1, null })
4960 +    {
4961 +        final CFException ex = new CFException();
4962 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4963 +        final FailingExceptionalCompletableFutureFunction r
4964 +            = new FailingExceptionalCompletableFutureFunction(ExecutionMode.SYNC);
4965 +        final DelegatedCompletionStage<Integer> d =
4966 +            new DelegatedCompletionStage<Integer>(f);
4967 +        if (!createIncomplete) f.completeExceptionally(ex);
4968 +        final CompletionStage<Integer> g = d.exceptionallyCompose(r);
4969 +        if (createIncomplete) f.completeExceptionally(ex);
4970 +
4971 +        checkCompletedExceptionally(f, ex);
4972 +        checkCompletedWithWrappedException(g.toCompletableFuture(), r.ex);
4973 +        r.assertInvoked();
4974 +    }}
4975 +
4976 +    /**
4977 +     * default exceptionallyComposeAsync result completes normally after normal
4978 +     * completion of source
4979 +     */
4980 +    public void testDefaultExceptionallyComposeAsync_normalCompletion() {
4981 +        for (boolean createIncomplete : new boolean[] { true, false })
4982 +        for (Integer v1 : new Integer[] { 1, null })
4983 +    {
4984 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4985 +        final ExceptionalCompletableFutureFunction r =
4986 +            new ExceptionalCompletableFutureFunction(ExecutionMode.ASYNC);
4987 +        final DelegatedCompletionStage<Integer> d =
4988 +            new DelegatedCompletionStage<Integer>(f);
4989 +        if (!createIncomplete) assertTrue(f.complete(v1));
4990 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r);
4991 +        if (createIncomplete) assertTrue(f.complete(v1));
4992 +
4993 +        checkCompletedNormally(f, v1);
4994 +        checkCompletedNormally(g.toCompletableFuture(), v1);
4995 +        r.assertNotInvoked();
4996 +    }}
4997 +
4998 +    /**
4999 +     * default-implemented exceptionallyComposeAsync result completes
5000 +     * normally after exceptional completion of source
5001 +     */
5002 +    public void testDefaultExceptionallyComposeAsync_exceptionalCompletion() {
5003 +        for (boolean createIncomplete : new boolean[] { true, false })
5004 +    {
5005 +        final CFException ex = new CFException();
5006 +        final ExceptionalCompletableFutureFunction r =
5007 +            new ExceptionalCompletableFutureFunction(ExecutionMode.ASYNC);
5008 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
5009 +        final DelegatedCompletionStage<Integer> d =
5010 +            new DelegatedCompletionStage<Integer>(f);
5011 +        if (!createIncomplete) f.completeExceptionally(ex);
5012 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r);
5013 +        if (createIncomplete) f.completeExceptionally(ex);
5014 +
5015 +        checkCompletedExceptionally(f, ex);
5016 +        checkCompletedNormally(g.toCompletableFuture(), r.value);
5017 +        r.assertInvoked();
5018 +    }}
5019 +
5020 +    /**
5021 +     * default-implemented exceptionallyComposeAsync completes
5022 +     * exceptionally on exception if action does
5023 +     */
5024 +    public void testDefaultExceptionallyComposeAsync_actionFailed() {
5025 +        for (boolean createIncomplete : new boolean[] { true, false })
5026 +        for (Integer v1 : new Integer[] { 1, null })
5027 +    {
5028 +        final CFException ex = new CFException();
5029 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
5030 +        final FailingExceptionalCompletableFutureFunction r
5031 +            = new FailingExceptionalCompletableFutureFunction(ExecutionMode.ASYNC);
5032 +        final DelegatedCompletionStage<Integer> d =
5033 +            new DelegatedCompletionStage<Integer>(f);
5034 +        if (!createIncomplete) f.completeExceptionally(ex);
5035 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r);
5036 +        if (createIncomplete) f.completeExceptionally(ex);
5037 +
5038 +        checkCompletedExceptionally(f, ex);
5039 +        checkCompletedWithWrappedException(g.toCompletableFuture(), r.ex);
5040 +        r.assertInvoked();
5041 +    }}
5042 +
5043 +
5044 +    /**
5045 +     * default exceptionallyComposeAsync result completes normally after normal
5046 +     * completion of source
5047 +     */
5048 +    public void testDefaultExceptionallyComposeAsyncExecutor_normalCompletion() {
5049 +        for (boolean createIncomplete : new boolean[] { true, false })
5050 +        for (Integer v1 : new Integer[] { 1, null })
5051 +    {
5052 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
5053 +        final ExceptionalCompletableFutureFunction r =
5054 +            new ExceptionalCompletableFutureFunction(ExecutionMode.EXECUTOR);
5055 +        final DelegatedCompletionStage<Integer> d =
5056 +            new DelegatedCompletionStage<Integer>(f);
5057 +        if (!createIncomplete) assertTrue(f.complete(v1));
5058 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r, new ThreadExecutor());
5059 +        if (createIncomplete) assertTrue(f.complete(v1));
5060 +
5061 +        checkCompletedNormally(f, v1);
5062 +        checkCompletedNormally(g.toCompletableFuture(), v1);
5063 +        r.assertNotInvoked();
5064 +    }}
5065 +
5066 +    /**
5067 +     * default-implemented exceptionallyComposeAsync result completes
5068 +     * normally after exceptional completion of source
5069 +     */
5070 +    public void testDefaultExceptionallyComposeAsyncExecutor_exceptionalCompletion() {
5071 +        for (boolean createIncomplete : new boolean[] { true, false })
5072 +    {
5073 +        final CFException ex = new CFException();
5074 +        final ExceptionalCompletableFutureFunction r =
5075 +            new ExceptionalCompletableFutureFunction(ExecutionMode.EXECUTOR);
5076 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
5077 +        final DelegatedCompletionStage<Integer> d =
5078 +            new DelegatedCompletionStage<Integer>(f);
5079 +        if (!createIncomplete) f.completeExceptionally(ex);
5080 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r, new ThreadExecutor());
5081 +        if (createIncomplete) f.completeExceptionally(ex);
5082 +
5083 +        checkCompletedExceptionally(f, ex);
5084 +        checkCompletedNormally(g.toCompletableFuture(), r.value);
5085 +        r.assertInvoked();
5086 +    }}
5087 +
5088 +    /**
5089 +     * default-implemented exceptionallyComposeAsync completes
5090 +     * exceptionally on exception if action does
5091 +     */
5092 +    public void testDefaultExceptionallyComposeAsyncExecutor_actionFailed() {
5093 +        for (boolean createIncomplete : new boolean[] { true, false })
5094 +        for (Integer v1 : new Integer[] { 1, null })
5095 +    {
5096 +        final CFException ex = new CFException();
5097 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
5098 +        final FailingExceptionalCompletableFutureFunction r
5099 +            = new FailingExceptionalCompletableFutureFunction(ExecutionMode.EXECUTOR);
5100 +        final DelegatedCompletionStage<Integer> d =
5101 +            new DelegatedCompletionStage<Integer>(f);
5102 +        if (!createIncomplete) f.completeExceptionally(ex);
5103 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r, new ThreadExecutor());
5104 +        if (createIncomplete) f.completeExceptionally(ex);
5105 +
5106 +        checkCompletedExceptionally(f, ex);
5107 +        checkCompletedWithWrappedException(g.toCompletableFuture(), r.ex);
5108 +        r.assertInvoked();
5109 +    }}
5110 +
5111   }

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