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Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.4 by jsr166, Sun Feb 10 21:18:25 2013 UTC vs.
Revision 1.204 by jsr166, Sun Sep 23 00:52:18 2018 UTC

# Line 5 | Line 5
5   * http://creativecommons.org/publicdomain/zero/1.0/
6   */
7  
8 < import junit.framework.*;
8 > import static java.util.concurrent.TimeUnit.MILLISECONDS;
9 > import static java.util.concurrent.TimeUnit.SECONDS;
10 > import static java.util.concurrent.CompletableFuture.completedFuture;
11 > import static java.util.concurrent.CompletableFuture.failedFuture;
12 >
13 > import java.lang.reflect.Method;
14 > import java.lang.reflect.Modifier;
15 >
16 > import java.util.stream.Collectors;
17 > import java.util.stream.Stream;
18 >
19 > import java.util.ArrayList;
20 > import java.util.Arrays;
21 > import java.util.List;
22 > import java.util.Objects;
23 > import java.util.Set;
24   import java.util.concurrent.Callable;
25   import java.util.concurrent.CancellationException;
11 import java.util.concurrent.CountDownLatch;
12 import java.util.concurrent.ExecutionException;
13 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 +    static class CFException extends RuntimeException {}
57 +
58      void checkIncomplete(CompletableFuture<?> f) {
59          assertFalse(f.isDone());
60          assertFalse(f.isCancelled());
61 <        assertTrue(f.toString().contains("[Not completed]"));
61 >        assertTrue(f.toString().matches(".*\\[.*Not completed.*\\]"));
62 >
63 >        Object result = null;
64          try {
65 <            assertNull(f.getNow(null));
65 >            result = f.getNow(null);
66          } catch (Throwable fail) { threadUnexpectedException(fail); }
67 +        assertNull(result);
68 +
69          try {
70 <            f.get(0L, SECONDS);
70 >            f.get(randomExpiredTimeout(), randomTimeUnit());
71              shouldThrow();
72          }
73          catch (TimeoutException success) {}
74          catch (Throwable fail) { threadUnexpectedException(fail); }
75      }
76  
77 <    void checkCompletedNormally(CompletableFuture<?> f, Object value) {
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 <        assertTrue(f.toString().contains("[Completed normally]"));
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 <            assertSame(value, f.join());
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 <            assertSame(value, f.getNow(null));
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 <            assertSame(value, f.get());
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 <            assertSame(value, f.get(0L, SECONDS));
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 <    // XXXX Just a skeleton implementation for now.
921 <    public void testTODO() {
922 <        fail("Please add some real tests!");
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 AtomicInteger a = new AtomicInteger(0);
930 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
931 >        if (!createIncomplete) assertTrue(f.complete(v1));
932 >        final CompletableFuture<Integer> g = m.exceptionally
933 >            (f, (Throwable t) -> {
934 >                a.getAndIncrement();
935 >                threadFail("should not be called");
936 >                return null;            // unreached
937 >            });
938 >        if (createIncomplete) assertTrue(f.complete(v1));
939 >
940 >        checkCompletedNormally(g, v1);
941 >        checkCompletedNormally(f, v1);
942 >        assertEquals(0, a.get());
943 >    }}
944 >
945 >    /**
946 >     * exceptionally action completes with function value on source
947 >     * exception
948 >     */
949 >    public void testExceptionally_exceptionalCompletion() {
950 >        for (ExecutionMode m : ExecutionMode.values())
951 >        for (boolean createIncomplete : new boolean[] { true, false })
952 >        for (Integer v1 : new Integer[] { 1, null })
953 >    {
954 >        final AtomicInteger a = new AtomicInteger(0);
955 >        final CFException ex = new CFException();
956 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
957 >        if (!createIncomplete) f.completeExceptionally(ex);
958 >        final CompletableFuture<Integer> g = m.exceptionally
959 >            (f, (Throwable t) -> {
960 >                m.checkExecutionMode();
961 >                threadAssertSame(t, ex);
962 >                a.getAndIncrement();
963 >                return v1;
964 >            });
965 >        if (createIncomplete) f.completeExceptionally(ex);
966 >
967 >        checkCompletedNormally(g, v1);
968 >        assertEquals(1, a.get());
969 >    }}
970 >
971 >    /**
972 >     * If an "exceptionally action" throws an exception, it completes
973 >     * exceptionally with that exception
974 >     */
975 >    public void testExceptionally_exceptionalCompletionActionFailed() {
976 >        for (ExecutionMode m : ExecutionMode.values())
977 >        for (boolean createIncomplete : new boolean[] { true, false })
978 >    {
979 >        final AtomicInteger a = new AtomicInteger(0);
980 >        final CFException ex1 = new CFException();
981 >        final CFException ex2 = new CFException();
982 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
983 >        if (!createIncomplete) f.completeExceptionally(ex1);
984 >        final CompletableFuture<Integer> g = m.exceptionally
985 >            (f, (Throwable t) -> {
986 >                m.checkExecutionMode();
987 >                threadAssertSame(t, ex1);
988 >                a.getAndIncrement();
989 >                throw ex2;
990 >            });
991 >        if (createIncomplete) f.completeExceptionally(ex1);
992 >
993 >        checkCompletedWithWrappedException(g, ex2);
994 >        checkCompletedExceptionally(f, ex1);
995 >        assertEquals(1, a.get());
996 >    }}
997 >
998 >    /**
999 >     * whenComplete action executes on normal completion, propagating
1000 >     * source result.
1001 >     */
1002 >    public void testWhenComplete_normalCompletion() {
1003 >        for (ExecutionMode m : ExecutionMode.values())
1004 >        for (boolean createIncomplete : new boolean[] { true, false })
1005 >        for (Integer v1 : new Integer[] { 1, null })
1006 >    {
1007 >        final AtomicInteger a = new AtomicInteger(0);
1008 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1009 >        if (!createIncomplete) assertTrue(f.complete(v1));
1010 >        final CompletableFuture<Integer> g = m.whenComplete
1011 >            (f,
1012 >             (Integer result, Throwable t) -> {
1013 >                m.checkExecutionMode();
1014 >                threadAssertSame(result, v1);
1015 >                threadAssertNull(t);
1016 >                a.getAndIncrement();
1017 >            });
1018 >        if (createIncomplete) assertTrue(f.complete(v1));
1019 >
1020 >        checkCompletedNormally(g, v1);
1021 >        checkCompletedNormally(f, v1);
1022 >        assertEquals(1, a.get());
1023 >    }}
1024 >
1025 >    /**
1026 >     * whenComplete action executes on exceptional completion, propagating
1027 >     * source result.
1028 >     */
1029 >    public void testWhenComplete_exceptionalCompletion() {
1030 >        for (ExecutionMode m : ExecutionMode.values())
1031 >        for (boolean createIncomplete : new boolean[] { true, false })
1032 >    {
1033 >        final AtomicInteger a = new AtomicInteger(0);
1034 >        final CFException ex = new CFException();
1035 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1036 >        if (!createIncomplete) f.completeExceptionally(ex);
1037 >        final CompletableFuture<Integer> g = m.whenComplete
1038 >            (f,
1039 >             (Integer result, Throwable t) -> {
1040 >                m.checkExecutionMode();
1041 >                threadAssertNull(result);
1042 >                threadAssertSame(t, ex);
1043 >                a.getAndIncrement();
1044 >            });
1045 >        if (createIncomplete) f.completeExceptionally(ex);
1046 >
1047 >        checkCompletedWithWrappedException(g, ex);
1048 >        checkCompletedExceptionally(f, ex);
1049 >        assertEquals(1, a.get());
1050 >    }}
1051 >
1052 >    /**
1053 >     * whenComplete action executes on cancelled source, propagating
1054 >     * CancellationException.
1055 >     */
1056 >    public void testWhenComplete_sourceCancelled() {
1057 >        for (ExecutionMode m : ExecutionMode.values())
1058 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1059 >        for (boolean createIncomplete : new boolean[] { true, false })
1060 >    {
1061 >        final AtomicInteger a = new AtomicInteger(0);
1062 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1063 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1064 >        final CompletableFuture<Integer> g = m.whenComplete
1065 >            (f,
1066 >             (Integer result, Throwable t) -> {
1067 >                m.checkExecutionMode();
1068 >                threadAssertNull(result);
1069 >                threadAssertTrue(t instanceof CancellationException);
1070 >                a.getAndIncrement();
1071 >            });
1072 >        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1073 >
1074 >        checkCompletedWithWrappedCancellationException(g);
1075 >        checkCancelled(f);
1076 >        assertEquals(1, a.get());
1077 >    }}
1078 >
1079 >    /**
1080 >     * If a whenComplete action throws an exception when triggered by
1081 >     * a normal completion, it completes exceptionally
1082 >     */
1083 >    public void testWhenComplete_sourceCompletedNormallyActionFailed() {
1084 >        for (boolean createIncomplete : new boolean[] { true, false })
1085 >        for (ExecutionMode m : ExecutionMode.values())
1086 >        for (Integer v1 : new Integer[] { 1, null })
1087 >    {
1088 >        final AtomicInteger a = new AtomicInteger(0);
1089 >        final CFException ex = new CFException();
1090 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1091 >        if (!createIncomplete) assertTrue(f.complete(v1));
1092 >        final CompletableFuture<Integer> g = m.whenComplete
1093 >            (f,
1094 >             (Integer result, Throwable t) -> {
1095 >                m.checkExecutionMode();
1096 >                threadAssertSame(result, v1);
1097 >                threadAssertNull(t);
1098 >                a.getAndIncrement();
1099 >                throw ex;
1100 >            });
1101 >        if (createIncomplete) assertTrue(f.complete(v1));
1102 >
1103 >        checkCompletedWithWrappedException(g, ex);
1104 >        checkCompletedNormally(f, v1);
1105 >        assertEquals(1, a.get());
1106 >    }}
1107 >
1108 >    /**
1109 >     * If a whenComplete action throws an exception when triggered by
1110 >     * a source completion that also throws an exception, the source
1111 >     * exception takes precedence (unlike handle)
1112 >     */
1113 >    public void testWhenComplete_sourceFailedActionFailed() {
1114 >        for (boolean createIncomplete : new boolean[] { true, false })
1115 >        for (ExecutionMode m : ExecutionMode.values())
1116 >    {
1117 >        final AtomicInteger a = new AtomicInteger(0);
1118 >        final CFException ex1 = new CFException();
1119 >        final CFException ex2 = new CFException();
1120 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1121 >
1122 >        if (!createIncomplete) f.completeExceptionally(ex1);
1123 >        final CompletableFuture<Integer> g = m.whenComplete
1124 >            (f,
1125 >             (Integer result, Throwable t) -> {
1126 >                m.checkExecutionMode();
1127 >                threadAssertSame(t, ex1);
1128 >                threadAssertNull(result);
1129 >                a.getAndIncrement();
1130 >                throw ex2;
1131 >            });
1132 >        if (createIncomplete) f.completeExceptionally(ex1);
1133 >
1134 >        checkCompletedWithWrappedException(g, ex1);
1135 >        checkCompletedExceptionally(f, ex1);
1136 >        if (testImplementationDetails) {
1137 >            assertEquals(1, ex1.getSuppressed().length);
1138 >            assertSame(ex2, ex1.getSuppressed()[0]);
1139 >        }
1140 >        assertEquals(1, a.get());
1141 >    }}
1142 >
1143 >    /**
1144 >     * handle action completes normally with function value on normal
1145 >     * completion of source
1146 >     */
1147 >    public void testHandle_normalCompletion() {
1148 >        for (ExecutionMode m : ExecutionMode.values())
1149 >        for (boolean createIncomplete : new boolean[] { true, false })
1150 >        for (Integer v1 : new Integer[] { 1, null })
1151 >    {
1152 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1153 >        final AtomicInteger a = new AtomicInteger(0);
1154 >        if (!createIncomplete) assertTrue(f.complete(v1));
1155 >        final CompletableFuture<Integer> g = m.handle
1156 >            (f,
1157 >             (Integer result, Throwable t) -> {
1158 >                m.checkExecutionMode();
1159 >                threadAssertSame(result, v1);
1160 >                threadAssertNull(t);
1161 >                a.getAndIncrement();
1162 >                return inc(v1);
1163 >            });
1164 >        if (createIncomplete) assertTrue(f.complete(v1));
1165 >
1166 >        checkCompletedNormally(g, inc(v1));
1167 >        checkCompletedNormally(f, v1);
1168 >        assertEquals(1, a.get());
1169 >    }}
1170 >
1171 >    /**
1172 >     * handle action completes normally with function value on
1173 >     * exceptional completion of source
1174 >     */
1175 >    public void testHandle_exceptionalCompletion() {
1176 >        for (ExecutionMode m : ExecutionMode.values())
1177 >        for (boolean createIncomplete : new boolean[] { true, false })
1178 >        for (Integer v1 : new Integer[] { 1, null })
1179 >    {
1180 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1181 >        final AtomicInteger a = new AtomicInteger(0);
1182 >        final CFException ex = new CFException();
1183 >        if (!createIncomplete) f.completeExceptionally(ex);
1184 >        final CompletableFuture<Integer> g = m.handle
1185 >            (f,
1186 >             (Integer result, Throwable t) -> {
1187 >                m.checkExecutionMode();
1188 >                threadAssertNull(result);
1189 >                threadAssertSame(t, ex);
1190 >                a.getAndIncrement();
1191 >                return v1;
1192 >            });
1193 >        if (createIncomplete) f.completeExceptionally(ex);
1194 >
1195 >        checkCompletedNormally(g, v1);
1196 >        checkCompletedExceptionally(f, ex);
1197 >        assertEquals(1, a.get());
1198 >    }}
1199 >
1200 >    /**
1201 >     * handle action completes normally with function value on
1202 >     * cancelled source
1203 >     */
1204 >    public void testHandle_sourceCancelled() {
1205 >        for (ExecutionMode m : ExecutionMode.values())
1206 >        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1207 >        for (boolean createIncomplete : new boolean[] { true, false })
1208 >        for (Integer v1 : new Integer[] { 1, null })
1209 >    {
1210 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1211 >        final AtomicInteger a = new AtomicInteger(0);
1212 >        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1213 >        final CompletableFuture<Integer> g = m.handle
1214 >            (f,
1215 >             (Integer result, Throwable t) -> {
1216 >                m.checkExecutionMode();
1217 >                threadAssertNull(result);
1218 >                threadAssertTrue(t instanceof CancellationException);
1219 >                a.getAndIncrement();
1220 >                return v1;
1221 >            });
1222 >        if (createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1223 >
1224 >        checkCompletedNormally(g, v1);
1225 >        checkCancelled(f);
1226 >        assertEquals(1, a.get());
1227 >    }}
1228 >
1229 >    /**
1230 >     * If a "handle action" throws an exception when triggered by
1231 >     * a normal completion, it completes exceptionally
1232 >     */
1233 >    public void testHandle_sourceCompletedNormallyActionFailed() {
1234 >        for (ExecutionMode m : ExecutionMode.values())
1235 >        for (boolean createIncomplete : new boolean[] { true, false })
1236 >        for (Integer v1 : new Integer[] { 1, null })
1237 >    {
1238 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1239 >        final AtomicInteger a = new AtomicInteger(0);
1240 >        final CFException ex = new CFException();
1241 >        if (!createIncomplete) assertTrue(f.complete(v1));
1242 >        final CompletableFuture<Integer> g = m.handle
1243 >            (f,
1244 >             (Integer result, Throwable t) -> {
1245 >                m.checkExecutionMode();
1246 >                threadAssertSame(result, v1);
1247 >                threadAssertNull(t);
1248 >                a.getAndIncrement();
1249 >                throw ex;
1250 >            });
1251 >        if (createIncomplete) assertTrue(f.complete(v1));
1252 >
1253 >        checkCompletedWithWrappedException(g, ex);
1254 >        checkCompletedNormally(f, v1);
1255 >        assertEquals(1, a.get());
1256 >    }}
1257 >
1258 >    /**
1259 >     * If a "handle action" throws an exception when triggered by
1260 >     * a source completion that also throws an exception, the action
1261 >     * exception takes precedence (unlike whenComplete)
1262 >     */
1263 >    public void testHandle_sourceFailedActionFailed() {
1264 >        for (boolean createIncomplete : new boolean[] { true, false })
1265 >        for (ExecutionMode m : ExecutionMode.values())
1266 >    {
1267 >        final AtomicInteger a = new AtomicInteger(0);
1268 >        final CFException ex1 = new CFException();
1269 >        final CFException ex2 = new CFException();
1270 >        final CompletableFuture<Integer> f = new CompletableFuture<>();
1271 >
1272 >        if (!createIncomplete) f.completeExceptionally(ex1);
1273 >        final CompletableFuture<Integer> g = m.handle
1274 >            (f,
1275 >             (Integer result, Throwable t) -> {
1276 >                m.checkExecutionMode();
1277 >                threadAssertNull(result);
1278 >                threadAssertSame(ex1, t);
1279 >                a.getAndIncrement();
1280 >                throw ex2;
1281 >            });
1282 >        if (createIncomplete) f.completeExceptionally(ex1);
1283 >
1284 >        checkCompletedWithWrappedException(g, ex2);
1285 >        checkCompletedExceptionally(f, ex1);
1286 >        assertEquals(1, a.get());
1287 >    }}
1288 >
1289 >    /**
1290 >     * runAsync completes after running Runnable
1291 >     */
1292 >    public void testRunAsync_normalCompletion() {
1293 >        ExecutionMode[] executionModes = {
1294 >            ExecutionMode.ASYNC,
1295 >            ExecutionMode.EXECUTOR,
1296 >        };
1297 >        for (ExecutionMode m : executionModes)
1298 >    {
1299 >        final Noop r = new Noop(m);
1300 >        final CompletableFuture<Void> f = m.runAsync(r);
1301 >        assertNull(f.join());
1302 >        checkCompletedNormally(f, null);
1303 >        r.assertInvoked();
1304 >    }}
1305 >
1306 >    /**
1307 >     * failing runAsync completes exceptionally after running Runnable
1308 >     */
1309 >    public void testRunAsync_exceptionalCompletion() {
1310 >        ExecutionMode[] executionModes = {
1311 >            ExecutionMode.ASYNC,
1312 >            ExecutionMode.EXECUTOR,
1313 >        };
1314 >        for (ExecutionMode m : executionModes)
1315 >    {
1316 >        final FailingRunnable r = new FailingRunnable(m);
1317 >        final CompletableFuture<Void> f = m.runAsync(r);
1318 >        checkCompletedWithWrappedException(f, r.ex);
1319 >        r.assertInvoked();
1320 >    }}
1321 >
1322 >    @SuppressWarnings("FutureReturnValueIgnored")
1323 >    public void testRunAsync_rejectingExecutor() {
1324 >        CountingRejectingExecutor e = new CountingRejectingExecutor();
1325 >        try {
1326 >            CompletableFuture.runAsync(() -> {}, e);
1327 >            shouldThrow();
1328 >        } catch (Throwable t) {
1329 >            assertSame(e.ex, t);
1330 >        }
1331 >
1332 >        assertEquals(1, e.count.get());
1333      }
1334  
1335 <    public void testToString() {
1336 <        CompletableFuture<String> f;
1335 >    /**
1336 >     * supplyAsync completes with result of supplier
1337 >     */
1338 >    public void testSupplyAsync_normalCompletion() {
1339 >        ExecutionMode[] executionModes = {
1340 >            ExecutionMode.ASYNC,
1341 >            ExecutionMode.EXECUTOR,
1342 >        };
1343 >        for (ExecutionMode m : executionModes)
1344 >        for (Integer v1 : new Integer[] { 1, null })
1345 >    {
1346 >        final IntegerSupplier r = new IntegerSupplier(m, v1);
1347 >        final CompletableFuture<Integer> f = m.supplyAsync(r);
1348 >        assertSame(v1, f.join());
1349 >        checkCompletedNormally(f, v1);
1350 >        r.assertInvoked();
1351 >    }}
1352  
1353 <        f = new CompletableFuture<String>();
1354 <        assertTrue(f.toString().contains("[Not completed]"));
1353 >    /**
1354 >     * Failing supplyAsync completes exceptionally
1355 >     */
1356 >    public void testSupplyAsync_exceptionalCompletion() {
1357 >        ExecutionMode[] executionModes = {
1358 >            ExecutionMode.ASYNC,
1359 >            ExecutionMode.EXECUTOR,
1360 >        };
1361 >        for (ExecutionMode m : executionModes)
1362 >    {
1363 >        FailingSupplier r = new FailingSupplier(m);
1364 >        CompletableFuture<Integer> f = m.supplyAsync(r);
1365 >        checkCompletedWithWrappedException(f, r.ex);
1366 >        r.assertInvoked();
1367 >    }}
1368  
1369 <        f.complete("foo");
1370 <        assertTrue(f.toString().contains("[Completed normally]"));
1369 >    @SuppressWarnings("FutureReturnValueIgnored")
1370 >    public void testSupplyAsync_rejectingExecutor() {
1371 >        CountingRejectingExecutor e = new CountingRejectingExecutor();
1372 >        try {
1373 >            CompletableFuture.supplyAsync(() -> null, e);
1374 >            shouldThrow();
1375 >        } catch (Throwable t) {
1376 >            assertSame(e.ex, t);
1377 >        }
1378  
1379 <        f = new CompletableFuture<String>();
78 <        f.completeExceptionally(new IndexOutOfBoundsException());
79 <        assertTrue(f.toString().contains("[Completed exceptionally]"));
1379 >        assertEquals(1, e.count.get());
1380      }
1381  
1382 +    // seq completion methods
1383 +
1384 +    /**
1385 +     * thenRun result completes normally after normal completion of source
1386 +     */
1387 +    public void testThenRun_normalCompletion() {
1388 +        for (ExecutionMode m : ExecutionMode.values())
1389 +        for (Integer v1 : new Integer[] { 1, null })
1390 +    {
1391 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1392 +        final Noop[] rs = new Noop[6];
1393 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1394 +
1395 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1396 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1397 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1398 +        checkIncomplete(h0);
1399 +        checkIncomplete(h1);
1400 +        checkIncomplete(h2);
1401 +        assertTrue(f.complete(v1));
1402 +        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1403 +        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1404 +        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1405 +
1406 +        checkCompletedNormally(h0, null);
1407 +        checkCompletedNormally(h1, null);
1408 +        checkCompletedNormally(h2, null);
1409 +        checkCompletedNormally(h3, null);
1410 +        checkCompletedNormally(h4, null);
1411 +        checkCompletedNormally(h5, null);
1412 +        checkCompletedNormally(f, v1);
1413 +        for (Noop r : rs) r.assertInvoked();
1414 +    }}
1415 +
1416 +    /**
1417 +     * thenRun result completes exceptionally after exceptional
1418 +     * completion of source
1419 +     */
1420 +    public void testThenRun_exceptionalCompletion() {
1421 +        for (ExecutionMode m : ExecutionMode.values())
1422 +    {
1423 +        final CFException ex = new CFException();
1424 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1425 +        final Noop[] rs = new Noop[6];
1426 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1427 +
1428 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1429 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1430 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1431 +        checkIncomplete(h0);
1432 +        checkIncomplete(h1);
1433 +        checkIncomplete(h2);
1434 +        assertTrue(f.completeExceptionally(ex));
1435 +        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1436 +        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1437 +        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1438 +
1439 +        checkCompletedWithWrappedException(h0, ex);
1440 +        checkCompletedWithWrappedException(h1, ex);
1441 +        checkCompletedWithWrappedException(h2, ex);
1442 +        checkCompletedWithWrappedException(h3, ex);
1443 +        checkCompletedWithWrappedException(h4, ex);
1444 +        checkCompletedWithWrappedException(h5, ex);
1445 +        checkCompletedExceptionally(f, ex);
1446 +        for (Noop r : rs) r.assertNotInvoked();
1447 +    }}
1448 +
1449 +    /**
1450 +     * thenRun result completes exceptionally if source cancelled
1451 +     */
1452 +    public void testThenRun_sourceCancelled() {
1453 +        for (ExecutionMode m : ExecutionMode.values())
1454 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1455 +    {
1456 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1457 +        final Noop[] rs = new Noop[6];
1458 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1459 +
1460 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1461 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1462 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1463 +        checkIncomplete(h0);
1464 +        checkIncomplete(h1);
1465 +        checkIncomplete(h2);
1466 +        assertTrue(f.cancel(mayInterruptIfRunning));
1467 +        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1468 +        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1469 +        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1470 +
1471 +        checkCompletedWithWrappedCancellationException(h0);
1472 +        checkCompletedWithWrappedCancellationException(h1);
1473 +        checkCompletedWithWrappedCancellationException(h2);
1474 +        checkCompletedWithWrappedCancellationException(h3);
1475 +        checkCompletedWithWrappedCancellationException(h4);
1476 +        checkCompletedWithWrappedCancellationException(h5);
1477 +        checkCancelled(f);
1478 +        for (Noop r : rs) r.assertNotInvoked();
1479 +    }}
1480 +
1481 +    /**
1482 +     * thenRun result completes exceptionally if action does
1483 +     */
1484 +    public void testThenRun_actionFailed() {
1485 +        for (ExecutionMode m : ExecutionMode.values())
1486 +        for (Integer v1 : new Integer[] { 1, null })
1487 +    {
1488 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1489 +        final FailingRunnable[] rs = new FailingRunnable[6];
1490 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
1491 +
1492 +        final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1493 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1494 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1495 +        assertTrue(f.complete(v1));
1496 +        final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1497 +        final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1498 +        final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1499 +
1500 +        checkCompletedWithWrappedException(h0, rs[0].ex);
1501 +        checkCompletedWithWrappedException(h1, rs[1].ex);
1502 +        checkCompletedWithWrappedException(h2, rs[2].ex);
1503 +        checkCompletedWithWrappedException(h3, rs[3].ex);
1504 +        checkCompletedWithWrappedException(h4, rs[4].ex);
1505 +        checkCompletedWithWrappedException(h5, rs[5].ex);
1506 +        checkCompletedNormally(f, v1);
1507 +    }}
1508 +
1509 +    /**
1510 +     * thenApply result completes normally after normal completion of source
1511 +     */
1512 +    public void testThenApply_normalCompletion() {
1513 +        for (ExecutionMode m : ExecutionMode.values())
1514 +        for (Integer v1 : new Integer[] { 1, null })
1515 +    {
1516 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1517 +        final IncFunction[] rs = new IncFunction[4];
1518 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1519 +
1520 +        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1521 +        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1522 +        checkIncomplete(h0);
1523 +        checkIncomplete(h1);
1524 +        assertTrue(f.complete(v1));
1525 +        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1526 +        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1527 +
1528 +        checkCompletedNormally(h0, inc(v1));
1529 +        checkCompletedNormally(h1, inc(v1));
1530 +        checkCompletedNormally(h2, inc(v1));
1531 +        checkCompletedNormally(h3, inc(v1));
1532 +        checkCompletedNormally(f, v1);
1533 +        for (IncFunction r : rs) r.assertValue(inc(v1));
1534 +    }}
1535 +
1536 +    /**
1537 +     * thenApply result completes exceptionally after exceptional
1538 +     * completion of source
1539 +     */
1540 +    public void testThenApply_exceptionalCompletion() {
1541 +        for (ExecutionMode m : ExecutionMode.values())
1542 +    {
1543 +        final CFException ex = new CFException();
1544 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1545 +        final IncFunction[] rs = new IncFunction[4];
1546 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1547 +
1548 +        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1549 +        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1550 +        assertTrue(f.completeExceptionally(ex));
1551 +        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1552 +        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1553 +
1554 +        checkCompletedWithWrappedException(h0, ex);
1555 +        checkCompletedWithWrappedException(h1, ex);
1556 +        checkCompletedWithWrappedException(h2, ex);
1557 +        checkCompletedWithWrappedException(h3, ex);
1558 +        checkCompletedExceptionally(f, ex);
1559 +        for (IncFunction r : rs) r.assertNotInvoked();
1560 +    }}
1561 +
1562 +    /**
1563 +     * thenApply result completes exceptionally if source cancelled
1564 +     */
1565 +    public void testThenApply_sourceCancelled() {
1566 +        for (ExecutionMode m : ExecutionMode.values())
1567 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1568 +    {
1569 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1570 +        final IncFunction[] rs = new IncFunction[4];
1571 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1572 +
1573 +        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1574 +        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1575 +        assertTrue(f.cancel(mayInterruptIfRunning));
1576 +        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1577 +        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1578 +
1579 +        checkCompletedWithWrappedCancellationException(h0);
1580 +        checkCompletedWithWrappedCancellationException(h1);
1581 +        checkCompletedWithWrappedCancellationException(h2);
1582 +        checkCompletedWithWrappedCancellationException(h3);
1583 +        checkCancelled(f);
1584 +        for (IncFunction r : rs) r.assertNotInvoked();
1585 +    }}
1586 +
1587 +    /**
1588 +     * thenApply result completes exceptionally if action does
1589 +     */
1590 +    public void testThenApply_actionFailed() {
1591 +        for (ExecutionMode m : ExecutionMode.values())
1592 +        for (Integer v1 : new Integer[] { 1, null })
1593 +    {
1594 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1595 +        final FailingFunction[] rs = new FailingFunction[4];
1596 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
1597 +
1598 +        final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1599 +        final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1600 +        assertTrue(f.complete(v1));
1601 +        final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1602 +        final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1603 +
1604 +        checkCompletedWithWrappedException(h0, rs[0].ex);
1605 +        checkCompletedWithWrappedException(h1, rs[1].ex);
1606 +        checkCompletedWithWrappedException(h2, rs[2].ex);
1607 +        checkCompletedWithWrappedException(h3, rs[3].ex);
1608 +        checkCompletedNormally(f, v1);
1609 +    }}
1610 +
1611 +    /**
1612 +     * thenAccept result completes normally after normal completion of source
1613 +     */
1614 +    public void testThenAccept_normalCompletion() {
1615 +        for (ExecutionMode m : ExecutionMode.values())
1616 +        for (Integer v1 : new Integer[] { 1, null })
1617 +    {
1618 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1619 +        final NoopConsumer[] rs = new NoopConsumer[4];
1620 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1621 +
1622 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1623 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1624 +        checkIncomplete(h0);
1625 +        checkIncomplete(h1);
1626 +        assertTrue(f.complete(v1));
1627 +        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1628 +        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1629 +
1630 +        checkCompletedNormally(h0, null);
1631 +        checkCompletedNormally(h1, null);
1632 +        checkCompletedNormally(h2, null);
1633 +        checkCompletedNormally(h3, null);
1634 +        checkCompletedNormally(f, v1);
1635 +        for (NoopConsumer r : rs) r.assertValue(v1);
1636 +    }}
1637 +
1638 +    /**
1639 +     * thenAccept result completes exceptionally after exceptional
1640 +     * completion of source
1641 +     */
1642 +    public void testThenAccept_exceptionalCompletion() {
1643 +        for (ExecutionMode m : ExecutionMode.values())
1644 +    {
1645 +        final CFException ex = new CFException();
1646 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1647 +        final NoopConsumer[] rs = new NoopConsumer[4];
1648 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1649 +
1650 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1651 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1652 +        assertTrue(f.completeExceptionally(ex));
1653 +        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1654 +        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1655 +
1656 +        checkCompletedWithWrappedException(h0, ex);
1657 +        checkCompletedWithWrappedException(h1, ex);
1658 +        checkCompletedWithWrappedException(h2, ex);
1659 +        checkCompletedWithWrappedException(h3, ex);
1660 +        checkCompletedExceptionally(f, ex);
1661 +        for (NoopConsumer r : rs) r.assertNotInvoked();
1662 +    }}
1663 +
1664 +    /**
1665 +     * thenAccept result completes exceptionally if source cancelled
1666 +     */
1667 +    public void testThenAccept_sourceCancelled() {
1668 +        for (ExecutionMode m : ExecutionMode.values())
1669 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1670 +    {
1671 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1672 +        final NoopConsumer[] rs = new NoopConsumer[4];
1673 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1674 +
1675 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1676 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1677 +        assertTrue(f.cancel(mayInterruptIfRunning));
1678 +        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1679 +        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1680 +
1681 +        checkCompletedWithWrappedCancellationException(h0);
1682 +        checkCompletedWithWrappedCancellationException(h1);
1683 +        checkCompletedWithWrappedCancellationException(h2);
1684 +        checkCompletedWithWrappedCancellationException(h3);
1685 +        checkCancelled(f);
1686 +        for (NoopConsumer r : rs) r.assertNotInvoked();
1687 +    }}
1688 +
1689 +    /**
1690 +     * thenAccept result completes exceptionally if action does
1691 +     */
1692 +    public void testThenAccept_actionFailed() {
1693 +        for (ExecutionMode m : ExecutionMode.values())
1694 +        for (Integer v1 : new Integer[] { 1, null })
1695 +    {
1696 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1697 +        final FailingConsumer[] rs = new FailingConsumer[4];
1698 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
1699 +
1700 +        final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1701 +        final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1702 +        assertTrue(f.complete(v1));
1703 +        final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1704 +        final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1705 +
1706 +        checkCompletedWithWrappedException(h0, rs[0].ex);
1707 +        checkCompletedWithWrappedException(h1, rs[1].ex);
1708 +        checkCompletedWithWrappedException(h2, rs[2].ex);
1709 +        checkCompletedWithWrappedException(h3, rs[3].ex);
1710 +        checkCompletedNormally(f, v1);
1711 +    }}
1712 +
1713 +    /**
1714 +     * thenCombine result completes normally after normal completion
1715 +     * of sources
1716 +     */
1717 +    public void testThenCombine_normalCompletion() {
1718 +        for (ExecutionMode m : ExecutionMode.values())
1719 +        for (boolean fFirst : new boolean[] { true, false })
1720 +        for (Integer v1 : new Integer[] { 1, null })
1721 +        for (Integer v2 : new Integer[] { 2, null })
1722 +    {
1723 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1724 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1725 +        final SubtractFunction[] rs = new SubtractFunction[6];
1726 +        for (int i = 0; i < rs.length; i++) rs[i] = new SubtractFunction(m);
1727 +
1728 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1729 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1730 +        final Integer w1 =  fFirst ? v1 : v2;
1731 +        final Integer w2 = !fFirst ? v1 : v2;
1732 +
1733 +        final CompletableFuture<Integer> h0 = m.thenCombine(f, g, rs[0]);
1734 +        final CompletableFuture<Integer> h1 = m.thenCombine(fst, fst, rs[1]);
1735 +        assertTrue(fst.complete(w1));
1736 +        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, rs[2]);
1737 +        final CompletableFuture<Integer> h3 = m.thenCombine(fst, fst, rs[3]);
1738 +        checkIncomplete(h0); rs[0].assertNotInvoked();
1739 +        checkIncomplete(h2); rs[2].assertNotInvoked();
1740 +        checkCompletedNormally(h1, subtract(w1, w1));
1741 +        checkCompletedNormally(h3, subtract(w1, w1));
1742 +        rs[1].assertValue(subtract(w1, w1));
1743 +        rs[3].assertValue(subtract(w1, w1));
1744 +        assertTrue(snd.complete(w2));
1745 +        final CompletableFuture<Integer> h4 = m.thenCombine(f, g, rs[4]);
1746 +
1747 +        checkCompletedNormally(h0, subtract(v1, v2));
1748 +        checkCompletedNormally(h2, subtract(v1, v2));
1749 +        checkCompletedNormally(h4, subtract(v1, v2));
1750 +        rs[0].assertValue(subtract(v1, v2));
1751 +        rs[2].assertValue(subtract(v1, v2));
1752 +        rs[4].assertValue(subtract(v1, v2));
1753 +
1754 +        checkCompletedNormally(f, v1);
1755 +        checkCompletedNormally(g, v2);
1756 +    }}
1757 +
1758 +    /**
1759 +     * thenCombine result completes exceptionally after exceptional
1760 +     * completion of either source
1761 +     */
1762 +    public void testThenCombine_exceptionalCompletion() throws Throwable {
1763 +        for (ExecutionMode m : ExecutionMode.values())
1764 +        for (boolean fFirst : new boolean[] { true, false })
1765 +        for (boolean failFirst : new boolean[] { true, false })
1766 +        for (Integer v1 : new Integer[] { 1, null })
1767 +    {
1768 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1769 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1770 +        final CFException ex = new CFException();
1771 +        final SubtractFunction r1 = new SubtractFunction(m);
1772 +        final SubtractFunction r2 = new SubtractFunction(m);
1773 +        final SubtractFunction r3 = new SubtractFunction(m);
1774 +
1775 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1776 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1777 +        final Callable<Boolean> complete1 = failFirst ?
1778 +            () -> fst.completeExceptionally(ex) :
1779 +            () -> fst.complete(v1);
1780 +        final Callable<Boolean> complete2 = failFirst ?
1781 +            () -> snd.complete(v1) :
1782 +            () -> snd.completeExceptionally(ex);
1783 +
1784 +        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1785 +        assertTrue(complete1.call());
1786 +        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1787 +        checkIncomplete(h1);
1788 +        checkIncomplete(h2);
1789 +        assertTrue(complete2.call());
1790 +        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1791 +
1792 +        checkCompletedWithWrappedException(h1, ex);
1793 +        checkCompletedWithWrappedException(h2, ex);
1794 +        checkCompletedWithWrappedException(h3, ex);
1795 +        r1.assertNotInvoked();
1796 +        r2.assertNotInvoked();
1797 +        r3.assertNotInvoked();
1798 +        checkCompletedNormally(failFirst ? snd : fst, v1);
1799 +        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1800 +    }}
1801 +
1802 +    /**
1803 +     * thenCombine result completes exceptionally if either source cancelled
1804 +     */
1805 +    public void testThenCombine_sourceCancelled() throws Throwable {
1806 +        for (ExecutionMode m : ExecutionMode.values())
1807 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1808 +        for (boolean fFirst : new boolean[] { true, false })
1809 +        for (boolean failFirst : new boolean[] { true, false })
1810 +        for (Integer v1 : new Integer[] { 1, null })
1811 +    {
1812 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1813 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1814 +        final SubtractFunction r1 = new SubtractFunction(m);
1815 +        final SubtractFunction r2 = new SubtractFunction(m);
1816 +        final SubtractFunction r3 = new SubtractFunction(m);
1817 +
1818 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1819 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1820 +        final Callable<Boolean> complete1 = failFirst ?
1821 +            () -> fst.cancel(mayInterruptIfRunning) :
1822 +            () -> fst.complete(v1);
1823 +        final Callable<Boolean> complete2 = failFirst ?
1824 +            () -> snd.complete(v1) :
1825 +            () -> snd.cancel(mayInterruptIfRunning);
1826 +
1827 +        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1828 +        assertTrue(complete1.call());
1829 +        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1830 +        checkIncomplete(h1);
1831 +        checkIncomplete(h2);
1832 +        assertTrue(complete2.call());
1833 +        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1834 +
1835 +        checkCompletedWithWrappedCancellationException(h1);
1836 +        checkCompletedWithWrappedCancellationException(h2);
1837 +        checkCompletedWithWrappedCancellationException(h3);
1838 +        r1.assertNotInvoked();
1839 +        r2.assertNotInvoked();
1840 +        r3.assertNotInvoked();
1841 +        checkCompletedNormally(failFirst ? snd : fst, v1);
1842 +        checkCancelled(failFirst ? fst : snd);
1843 +    }}
1844 +
1845 +    /**
1846 +     * thenCombine result completes exceptionally if action does
1847 +     */
1848 +    public void testThenCombine_actionFailed() {
1849 +        for (ExecutionMode m : ExecutionMode.values())
1850 +        for (boolean fFirst : new boolean[] { true, false })
1851 +        for (Integer v1 : new Integer[] { 1, null })
1852 +        for (Integer v2 : new Integer[] { 2, null })
1853 +    {
1854 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1855 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1856 +        final FailingBiFunction r1 = new FailingBiFunction(m);
1857 +        final FailingBiFunction r2 = new FailingBiFunction(m);
1858 +        final FailingBiFunction r3 = new FailingBiFunction(m);
1859 +
1860 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1861 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1862 +        final Integer w1 =  fFirst ? v1 : v2;
1863 +        final Integer w2 = !fFirst ? v1 : v2;
1864 +
1865 +        final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1866 +        assertTrue(fst.complete(w1));
1867 +        final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1868 +        assertTrue(snd.complete(w2));
1869 +        final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1870 +
1871 +        checkCompletedWithWrappedException(h1, r1.ex);
1872 +        checkCompletedWithWrappedException(h2, r2.ex);
1873 +        checkCompletedWithWrappedException(h3, r3.ex);
1874 +        r1.assertInvoked();
1875 +        r2.assertInvoked();
1876 +        r3.assertInvoked();
1877 +        checkCompletedNormally(f, v1);
1878 +        checkCompletedNormally(g, v2);
1879 +    }}
1880 +
1881 +    /**
1882 +     * thenAcceptBoth result completes normally after normal
1883 +     * completion of sources
1884 +     */
1885 +    public void testThenAcceptBoth_normalCompletion() {
1886 +        for (ExecutionMode m : ExecutionMode.values())
1887 +        for (boolean fFirst : new boolean[] { true, false })
1888 +        for (Integer v1 : new Integer[] { 1, null })
1889 +        for (Integer v2 : new Integer[] { 2, null })
1890 +    {
1891 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1892 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1893 +        final SubtractAction r1 = new SubtractAction(m);
1894 +        final SubtractAction r2 = new SubtractAction(m);
1895 +        final SubtractAction r3 = new SubtractAction(m);
1896 +
1897 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1898 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1899 +        final Integer w1 =  fFirst ? v1 : v2;
1900 +        final Integer w2 = !fFirst ? v1 : v2;
1901 +
1902 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1903 +        assertTrue(fst.complete(w1));
1904 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1905 +        checkIncomplete(h1);
1906 +        checkIncomplete(h2);
1907 +        r1.assertNotInvoked();
1908 +        r2.assertNotInvoked();
1909 +        assertTrue(snd.complete(w2));
1910 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1911 +
1912 +        checkCompletedNormally(h1, null);
1913 +        checkCompletedNormally(h2, null);
1914 +        checkCompletedNormally(h3, null);
1915 +        r1.assertValue(subtract(v1, v2));
1916 +        r2.assertValue(subtract(v1, v2));
1917 +        r3.assertValue(subtract(v1, v2));
1918 +        checkCompletedNormally(f, v1);
1919 +        checkCompletedNormally(g, v2);
1920 +    }}
1921 +
1922 +    /**
1923 +     * thenAcceptBoth result completes exceptionally after exceptional
1924 +     * completion of either source
1925 +     */
1926 +    public void testThenAcceptBoth_exceptionalCompletion() throws Throwable {
1927 +        for (ExecutionMode m : ExecutionMode.values())
1928 +        for (boolean fFirst : new boolean[] { true, false })
1929 +        for (boolean failFirst : new boolean[] { true, false })
1930 +        for (Integer v1 : new Integer[] { 1, null })
1931 +    {
1932 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1933 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1934 +        final CFException ex = new CFException();
1935 +        final SubtractAction r1 = new SubtractAction(m);
1936 +        final SubtractAction r2 = new SubtractAction(m);
1937 +        final SubtractAction r3 = new SubtractAction(m);
1938 +
1939 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1940 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1941 +        final Callable<Boolean> complete1 = failFirst ?
1942 +            () -> fst.completeExceptionally(ex) :
1943 +            () -> fst.complete(v1);
1944 +        final Callable<Boolean> complete2 = failFirst ?
1945 +            () -> snd.complete(v1) :
1946 +            () -> snd.completeExceptionally(ex);
1947 +
1948 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1949 +        assertTrue(complete1.call());
1950 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1951 +        checkIncomplete(h1);
1952 +        checkIncomplete(h2);
1953 +        assertTrue(complete2.call());
1954 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1955 +
1956 +        checkCompletedWithWrappedException(h1, ex);
1957 +        checkCompletedWithWrappedException(h2, ex);
1958 +        checkCompletedWithWrappedException(h3, ex);
1959 +        r1.assertNotInvoked();
1960 +        r2.assertNotInvoked();
1961 +        r3.assertNotInvoked();
1962 +        checkCompletedNormally(failFirst ? snd : fst, v1);
1963 +        checkCompletedExceptionally(failFirst ? fst : snd, ex);
1964 +    }}
1965 +
1966 +    /**
1967 +     * thenAcceptBoth result completes exceptionally if either source cancelled
1968 +     */
1969 +    public void testThenAcceptBoth_sourceCancelled() throws Throwable {
1970 +        for (ExecutionMode m : ExecutionMode.values())
1971 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1972 +        for (boolean fFirst : new boolean[] { true, false })
1973 +        for (boolean failFirst : new boolean[] { true, false })
1974 +        for (Integer v1 : new Integer[] { 1, null })
1975 +    {
1976 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
1977 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
1978 +        final SubtractAction r1 = new SubtractAction(m);
1979 +        final SubtractAction r2 = new SubtractAction(m);
1980 +        final SubtractAction r3 = new SubtractAction(m);
1981 +
1982 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
1983 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
1984 +        final Callable<Boolean> complete1 = failFirst ?
1985 +            () -> fst.cancel(mayInterruptIfRunning) :
1986 +            () -> fst.complete(v1);
1987 +        final Callable<Boolean> complete2 = failFirst ?
1988 +            () -> snd.complete(v1) :
1989 +            () -> snd.cancel(mayInterruptIfRunning);
1990 +
1991 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
1992 +        assertTrue(complete1.call());
1993 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
1994 +        checkIncomplete(h1);
1995 +        checkIncomplete(h2);
1996 +        assertTrue(complete2.call());
1997 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1998 +
1999 +        checkCompletedWithWrappedCancellationException(h1);
2000 +        checkCompletedWithWrappedCancellationException(h2);
2001 +        checkCompletedWithWrappedCancellationException(h3);
2002 +        r1.assertNotInvoked();
2003 +        r2.assertNotInvoked();
2004 +        r3.assertNotInvoked();
2005 +        checkCompletedNormally(failFirst ? snd : fst, v1);
2006 +        checkCancelled(failFirst ? fst : snd);
2007 +    }}
2008 +
2009 +    /**
2010 +     * thenAcceptBoth result completes exceptionally if action does
2011 +     */
2012 +    public void testThenAcceptBoth_actionFailed() {
2013 +        for (ExecutionMode m : ExecutionMode.values())
2014 +        for (boolean fFirst : new boolean[] { true, false })
2015 +        for (Integer v1 : new Integer[] { 1, null })
2016 +        for (Integer v2 : new Integer[] { 2, null })
2017 +    {
2018 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2019 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2020 +        final FailingBiConsumer r1 = new FailingBiConsumer(m);
2021 +        final FailingBiConsumer r2 = new FailingBiConsumer(m);
2022 +        final FailingBiConsumer r3 = new FailingBiConsumer(m);
2023 +
2024 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2025 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2026 +        final Integer w1 =  fFirst ? v1 : v2;
2027 +        final Integer w2 = !fFirst ? v1 : v2;
2028 +
2029 +        final CompletableFuture<Void> h1 = m.thenAcceptBoth(f, g, r1);
2030 +        assertTrue(fst.complete(w1));
2031 +        final CompletableFuture<Void> h2 = m.thenAcceptBoth(f, g, r2);
2032 +        assertTrue(snd.complete(w2));
2033 +        final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
2034 +
2035 +        checkCompletedWithWrappedException(h1, r1.ex);
2036 +        checkCompletedWithWrappedException(h2, r2.ex);
2037 +        checkCompletedWithWrappedException(h3, r3.ex);
2038 +        r1.assertInvoked();
2039 +        r2.assertInvoked();
2040 +        r3.assertInvoked();
2041 +        checkCompletedNormally(f, v1);
2042 +        checkCompletedNormally(g, v2);
2043 +    }}
2044 +
2045 +    /**
2046 +     * runAfterBoth result completes normally after normal
2047 +     * completion of sources
2048 +     */
2049 +    public void testRunAfterBoth_normalCompletion() {
2050 +        for (ExecutionMode m : ExecutionMode.values())
2051 +        for (boolean fFirst : new boolean[] { true, false })
2052 +        for (Integer v1 : new Integer[] { 1, null })
2053 +        for (Integer v2 : new Integer[] { 2, null })
2054 +    {
2055 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2056 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2057 +        final Noop r1 = new Noop(m);
2058 +        final Noop r2 = new Noop(m);
2059 +        final Noop r3 = new Noop(m);
2060 +
2061 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2062 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2063 +        final Integer w1 =  fFirst ? v1 : v2;
2064 +        final Integer w2 = !fFirst ? v1 : v2;
2065 +
2066 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2067 +        assertTrue(fst.complete(w1));
2068 +        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2069 +        checkIncomplete(h1);
2070 +        checkIncomplete(h2);
2071 +        r1.assertNotInvoked();
2072 +        r2.assertNotInvoked();
2073 +        assertTrue(snd.complete(w2));
2074 +        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2075 +
2076 +        checkCompletedNormally(h1, null);
2077 +        checkCompletedNormally(h2, null);
2078 +        checkCompletedNormally(h3, null);
2079 +        r1.assertInvoked();
2080 +        r2.assertInvoked();
2081 +        r3.assertInvoked();
2082 +        checkCompletedNormally(f, v1);
2083 +        checkCompletedNormally(g, v2);
2084 +    }}
2085 +
2086 +    /**
2087 +     * runAfterBoth result completes exceptionally after exceptional
2088 +     * completion of either source
2089 +     */
2090 +    public void testRunAfterBoth_exceptionalCompletion() throws Throwable {
2091 +        for (ExecutionMode m : ExecutionMode.values())
2092 +        for (boolean fFirst : new boolean[] { true, false })
2093 +        for (boolean failFirst : new boolean[] { true, false })
2094 +        for (Integer v1 : new Integer[] { 1, null })
2095 +    {
2096 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2097 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2098 +        final CFException ex = new CFException();
2099 +        final Noop r1 = new Noop(m);
2100 +        final Noop r2 = new Noop(m);
2101 +        final Noop r3 = new Noop(m);
2102 +
2103 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2104 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2105 +        final Callable<Boolean> complete1 = failFirst ?
2106 +            () -> fst.completeExceptionally(ex) :
2107 +            () -> fst.complete(v1);
2108 +        final Callable<Boolean> complete2 = failFirst ?
2109 +            () -> snd.complete(v1) :
2110 +            () -> snd.completeExceptionally(ex);
2111 +
2112 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2113 +        assertTrue(complete1.call());
2114 +        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2115 +        checkIncomplete(h1);
2116 +        checkIncomplete(h2);
2117 +        assertTrue(complete2.call());
2118 +        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2119 +
2120 +        checkCompletedWithWrappedException(h1, ex);
2121 +        checkCompletedWithWrappedException(h2, ex);
2122 +        checkCompletedWithWrappedException(h3, ex);
2123 +        r1.assertNotInvoked();
2124 +        r2.assertNotInvoked();
2125 +        r3.assertNotInvoked();
2126 +        checkCompletedNormally(failFirst ? snd : fst, v1);
2127 +        checkCompletedExceptionally(failFirst ? fst : snd, ex);
2128 +    }}
2129 +
2130 +    /**
2131 +     * runAfterBoth result completes exceptionally if either source cancelled
2132 +     */
2133 +    public void testRunAfterBoth_sourceCancelled() throws Throwable {
2134 +        for (ExecutionMode m : ExecutionMode.values())
2135 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2136 +        for (boolean fFirst : new boolean[] { true, false })
2137 +        for (boolean failFirst : new boolean[] { true, false })
2138 +        for (Integer v1 : new Integer[] { 1, null })
2139 +    {
2140 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2141 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2142 +        final Noop r1 = new Noop(m);
2143 +        final Noop r2 = new Noop(m);
2144 +        final Noop r3 = new Noop(m);
2145 +
2146 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2147 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2148 +        final Callable<Boolean> complete1 = failFirst ?
2149 +            () -> fst.cancel(mayInterruptIfRunning) :
2150 +            () -> fst.complete(v1);
2151 +        final Callable<Boolean> complete2 = failFirst ?
2152 +            () -> snd.complete(v1) :
2153 +            () -> snd.cancel(mayInterruptIfRunning);
2154 +
2155 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2156 +        assertTrue(complete1.call());
2157 +        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2158 +        checkIncomplete(h1);
2159 +        checkIncomplete(h2);
2160 +        assertTrue(complete2.call());
2161 +        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2162 +
2163 +        checkCompletedWithWrappedCancellationException(h1);
2164 +        checkCompletedWithWrappedCancellationException(h2);
2165 +        checkCompletedWithWrappedCancellationException(h3);
2166 +        r1.assertNotInvoked();
2167 +        r2.assertNotInvoked();
2168 +        r3.assertNotInvoked();
2169 +        checkCompletedNormally(failFirst ? snd : fst, v1);
2170 +        checkCancelled(failFirst ? fst : snd);
2171 +    }}
2172 +
2173 +    /**
2174 +     * runAfterBoth result completes exceptionally if action does
2175 +     */
2176 +    public void testRunAfterBoth_actionFailed() {
2177 +        for (ExecutionMode m : ExecutionMode.values())
2178 +        for (boolean fFirst : new boolean[] { true, false })
2179 +        for (Integer v1 : new Integer[] { 1, null })
2180 +        for (Integer v2 : new Integer[] { 2, null })
2181 +    {
2182 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2183 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2184 +        final FailingRunnable r1 = new FailingRunnable(m);
2185 +        final FailingRunnable r2 = new FailingRunnable(m);
2186 +        final FailingRunnable r3 = new FailingRunnable(m);
2187 +
2188 +        final CompletableFuture<Integer> fst =  fFirst ? f : g;
2189 +        final CompletableFuture<Integer> snd = !fFirst ? f : g;
2190 +        final Integer w1 =  fFirst ? v1 : v2;
2191 +        final Integer w2 = !fFirst ? v1 : v2;
2192 +
2193 +        final CompletableFuture<Void> h1 = m.runAfterBoth(f, g, r1);
2194 +        assertTrue(fst.complete(w1));
2195 +        final CompletableFuture<Void> h2 = m.runAfterBoth(f, g, r2);
2196 +        assertTrue(snd.complete(w2));
2197 +        final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2198 +
2199 +        checkCompletedWithWrappedException(h1, r1.ex);
2200 +        checkCompletedWithWrappedException(h2, r2.ex);
2201 +        checkCompletedWithWrappedException(h3, r3.ex);
2202 +        r1.assertInvoked();
2203 +        r2.assertInvoked();
2204 +        r3.assertInvoked();
2205 +        checkCompletedNormally(f, v1);
2206 +        checkCompletedNormally(g, v2);
2207 +    }}
2208 +
2209 +    /**
2210 +     * applyToEither result completes normally after normal completion
2211 +     * of either source
2212 +     */
2213 +    public void testApplyToEither_normalCompletion() {
2214 +        for (ExecutionMode m : ExecutionMode.values())
2215 +        for (Integer v1 : new Integer[] { 1, null })
2216 +        for (Integer v2 : new Integer[] { 2, null })
2217 +    {
2218 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2219 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2220 +        final IncFunction[] rs = new IncFunction[6];
2221 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2222 +
2223 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2224 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2225 +        checkIncomplete(h0);
2226 +        checkIncomplete(h1);
2227 +        rs[0].assertNotInvoked();
2228 +        rs[1].assertNotInvoked();
2229 +        f.complete(v1);
2230 +        checkCompletedNormally(h0, inc(v1));
2231 +        checkCompletedNormally(h1, inc(v1));
2232 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2233 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2234 +        checkCompletedNormally(h2, inc(v1));
2235 +        checkCompletedNormally(h3, inc(v1));
2236 +        g.complete(v2);
2237 +
2238 +        // unspecified behavior - both source completions available
2239 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2240 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2241 +        rs[4].assertValue(h4.join());
2242 +        rs[5].assertValue(h5.join());
2243 +        assertTrue(Objects.equals(inc(v1), h4.join()) ||
2244 +                   Objects.equals(inc(v2), h4.join()));
2245 +        assertTrue(Objects.equals(inc(v1), h5.join()) ||
2246 +                   Objects.equals(inc(v2), h5.join()));
2247 +
2248 +        checkCompletedNormally(f, v1);
2249 +        checkCompletedNormally(g, v2);
2250 +        checkCompletedNormally(h0, inc(v1));
2251 +        checkCompletedNormally(h1, inc(v1));
2252 +        checkCompletedNormally(h2, inc(v1));
2253 +        checkCompletedNormally(h3, inc(v1));
2254 +        for (int i = 0; i < 4; i++) rs[i].assertValue(inc(v1));
2255 +    }}
2256 +
2257 +    /**
2258 +     * applyToEither result completes exceptionally after exceptional
2259 +     * completion of either source
2260 +     */
2261 +    public void testApplyToEither_exceptionalCompletion() {
2262 +        for (ExecutionMode m : ExecutionMode.values())
2263 +        for (Integer v1 : new Integer[] { 1, null })
2264 +    {
2265 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2266 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2267 +        final CFException ex = new CFException();
2268 +        final IncFunction[] rs = new IncFunction[6];
2269 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2270 +
2271 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2272 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2273 +        checkIncomplete(h0);
2274 +        checkIncomplete(h1);
2275 +        rs[0].assertNotInvoked();
2276 +        rs[1].assertNotInvoked();
2277 +        f.completeExceptionally(ex);
2278 +        checkCompletedWithWrappedException(h0, ex);
2279 +        checkCompletedWithWrappedException(h1, ex);
2280 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2281 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2282 +        checkCompletedWithWrappedException(h2, ex);
2283 +        checkCompletedWithWrappedException(h3, ex);
2284 +        g.complete(v1);
2285 +
2286 +        // unspecified behavior - both source completions available
2287 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2288 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2289 +        try {
2290 +            assertEquals(inc(v1), h4.join());
2291 +            rs[4].assertValue(inc(v1));
2292 +        } catch (CompletionException ok) {
2293 +            checkCompletedWithWrappedException(h4, ex);
2294 +            rs[4].assertNotInvoked();
2295 +        }
2296 +        try {
2297 +            assertEquals(inc(v1), h5.join());
2298 +            rs[5].assertValue(inc(v1));
2299 +        } catch (CompletionException ok) {
2300 +            checkCompletedWithWrappedException(h5, ex);
2301 +            rs[5].assertNotInvoked();
2302 +        }
2303 +
2304 +        checkCompletedExceptionally(f, ex);
2305 +        checkCompletedNormally(g, v1);
2306 +        checkCompletedWithWrappedException(h0, ex);
2307 +        checkCompletedWithWrappedException(h1, ex);
2308 +        checkCompletedWithWrappedException(h2, ex);
2309 +        checkCompletedWithWrappedException(h3, ex);
2310 +        checkCompletedWithWrappedException(h4, ex);
2311 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2312 +    }}
2313 +
2314 +    public void testApplyToEither_exceptionalCompletion2() {
2315 +        for (ExecutionMode m : ExecutionMode.values())
2316 +        for (boolean fFirst : new boolean[] { true, false })
2317 +        for (Integer v1 : new Integer[] { 1, null })
2318 +    {
2319 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2320 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2321 +        final CFException ex = new CFException();
2322 +        final IncFunction[] rs = new IncFunction[6];
2323 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2324 +
2325 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2326 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2327 +        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2328 +        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2329 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2330 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2331 +
2332 +        // unspecified behavior - both source completions available
2333 +        try {
2334 +            assertEquals(inc(v1), h0.join());
2335 +            rs[0].assertValue(inc(v1));
2336 +        } catch (CompletionException ok) {
2337 +            checkCompletedWithWrappedException(h0, ex);
2338 +            rs[0].assertNotInvoked();
2339 +        }
2340 +        try {
2341 +            assertEquals(inc(v1), h1.join());
2342 +            rs[1].assertValue(inc(v1));
2343 +        } catch (CompletionException ok) {
2344 +            checkCompletedWithWrappedException(h1, ex);
2345 +            rs[1].assertNotInvoked();
2346 +        }
2347 +        try {
2348 +            assertEquals(inc(v1), h2.join());
2349 +            rs[2].assertValue(inc(v1));
2350 +        } catch (CompletionException ok) {
2351 +            checkCompletedWithWrappedException(h2, ex);
2352 +            rs[2].assertNotInvoked();
2353 +        }
2354 +        try {
2355 +            assertEquals(inc(v1), h3.join());
2356 +            rs[3].assertValue(inc(v1));
2357 +        } catch (CompletionException ok) {
2358 +            checkCompletedWithWrappedException(h3, ex);
2359 +            rs[3].assertNotInvoked();
2360 +        }
2361 +
2362 +        checkCompletedNormally(f, v1);
2363 +        checkCompletedExceptionally(g, ex);
2364 +    }}
2365 +
2366 +    /**
2367 +     * applyToEither result completes exceptionally if either source cancelled
2368 +     */
2369 +    public void testApplyToEither_sourceCancelled() {
2370 +        for (ExecutionMode m : ExecutionMode.values())
2371 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2372 +        for (Integer v1 : new Integer[] { 1, null })
2373 +    {
2374 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2375 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2376 +        final IncFunction[] rs = new IncFunction[6];
2377 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2378 +
2379 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2380 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2381 +        checkIncomplete(h0);
2382 +        checkIncomplete(h1);
2383 +        rs[0].assertNotInvoked();
2384 +        rs[1].assertNotInvoked();
2385 +        f.cancel(mayInterruptIfRunning);
2386 +        checkCompletedWithWrappedCancellationException(h0);
2387 +        checkCompletedWithWrappedCancellationException(h1);
2388 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2389 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2390 +        checkCompletedWithWrappedCancellationException(h2);
2391 +        checkCompletedWithWrappedCancellationException(h3);
2392 +        g.complete(v1);
2393 +
2394 +        // unspecified behavior - both source completions available
2395 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2396 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2397 +        try {
2398 +            assertEquals(inc(v1), h4.join());
2399 +            rs[4].assertValue(inc(v1));
2400 +        } catch (CompletionException ok) {
2401 +            checkCompletedWithWrappedCancellationException(h4);
2402 +            rs[4].assertNotInvoked();
2403 +        }
2404 +        try {
2405 +            assertEquals(inc(v1), h5.join());
2406 +            rs[5].assertValue(inc(v1));
2407 +        } catch (CompletionException ok) {
2408 +            checkCompletedWithWrappedCancellationException(h5);
2409 +            rs[5].assertNotInvoked();
2410 +        }
2411 +
2412 +        checkCancelled(f);
2413 +        checkCompletedNormally(g, v1);
2414 +        checkCompletedWithWrappedCancellationException(h0);
2415 +        checkCompletedWithWrappedCancellationException(h1);
2416 +        checkCompletedWithWrappedCancellationException(h2);
2417 +        checkCompletedWithWrappedCancellationException(h3);
2418 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2419 +    }}
2420 +
2421 +    public void testApplyToEither_sourceCancelled2() {
2422 +        for (ExecutionMode m : ExecutionMode.values())
2423 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2424 +        for (boolean fFirst : new boolean[] { true, false })
2425 +        for (Integer v1 : new Integer[] { 1, null })
2426 +    {
2427 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2428 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2429 +        final IncFunction[] rs = new IncFunction[6];
2430 +        for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
2431 +
2432 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2433 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2434 +        assertTrue(fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2435 +        assertTrue(!fFirst ? f.complete(v1) : g.cancel(mayInterruptIfRunning));
2436 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2437 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2438 +
2439 +        // unspecified behavior - both source completions available
2440 +        try {
2441 +            assertEquals(inc(v1), h0.join());
2442 +            rs[0].assertValue(inc(v1));
2443 +        } catch (CompletionException ok) {
2444 +            checkCompletedWithWrappedCancellationException(h0);
2445 +            rs[0].assertNotInvoked();
2446 +        }
2447 +        try {
2448 +            assertEquals(inc(v1), h1.join());
2449 +            rs[1].assertValue(inc(v1));
2450 +        } catch (CompletionException ok) {
2451 +            checkCompletedWithWrappedCancellationException(h1);
2452 +            rs[1].assertNotInvoked();
2453 +        }
2454 +        try {
2455 +            assertEquals(inc(v1), h2.join());
2456 +            rs[2].assertValue(inc(v1));
2457 +        } catch (CompletionException ok) {
2458 +            checkCompletedWithWrappedCancellationException(h2);
2459 +            rs[2].assertNotInvoked();
2460 +        }
2461 +        try {
2462 +            assertEquals(inc(v1), h3.join());
2463 +            rs[3].assertValue(inc(v1));
2464 +        } catch (CompletionException ok) {
2465 +            checkCompletedWithWrappedCancellationException(h3);
2466 +            rs[3].assertNotInvoked();
2467 +        }
2468 +
2469 +        checkCompletedNormally(f, v1);
2470 +        checkCancelled(g);
2471 +    }}
2472 +
2473 +    /**
2474 +     * applyToEither result completes exceptionally if action does
2475 +     */
2476 +    public void testApplyToEither_actionFailed() {
2477 +        for (ExecutionMode m : ExecutionMode.values())
2478 +        for (Integer v1 : new Integer[] { 1, null })
2479 +        for (Integer v2 : new Integer[] { 2, null })
2480 +    {
2481 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2482 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2483 +        final FailingFunction[] rs = new FailingFunction[6];
2484 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
2485 +
2486 +        final CompletableFuture<Integer> h0 = m.applyToEither(f, g, rs[0]);
2487 +        final CompletableFuture<Integer> h1 = m.applyToEither(g, f, rs[1]);
2488 +        f.complete(v1);
2489 +        final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2490 +        final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2491 +        checkCompletedWithWrappedException(h0, rs[0].ex);
2492 +        checkCompletedWithWrappedException(h1, rs[1].ex);
2493 +        checkCompletedWithWrappedException(h2, rs[2].ex);
2494 +        checkCompletedWithWrappedException(h3, rs[3].ex);
2495 +        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2496 +
2497 +        g.complete(v2);
2498 +
2499 +        // unspecified behavior - both source completions available
2500 +        final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2501 +        final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2502 +
2503 +        checkCompletedWithWrappedException(h4, rs[4].ex);
2504 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2505 +                   Objects.equals(v2, rs[4].value));
2506 +        checkCompletedWithWrappedException(h5, rs[5].ex);
2507 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2508 +                   Objects.equals(v2, rs[5].value));
2509 +
2510 +        checkCompletedNormally(f, v1);
2511 +        checkCompletedNormally(g, v2);
2512 +    }}
2513 +
2514 +    /**
2515 +     * acceptEither result completes normally after normal completion
2516 +     * of either source
2517 +     */
2518 +    public void testAcceptEither_normalCompletion() {
2519 +        for (ExecutionMode m : ExecutionMode.values())
2520 +        for (Integer v1 : new Integer[] { 1, null })
2521 +        for (Integer v2 : new Integer[] { 2, null })
2522 +    {
2523 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2524 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2525 +        final NoopConsumer[] rs = new NoopConsumer[6];
2526 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2527 +
2528 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2529 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2530 +        checkIncomplete(h0);
2531 +        checkIncomplete(h1);
2532 +        rs[0].assertNotInvoked();
2533 +        rs[1].assertNotInvoked();
2534 +        f.complete(v1);
2535 +        checkCompletedNormally(h0, null);
2536 +        checkCompletedNormally(h1, null);
2537 +        rs[0].assertValue(v1);
2538 +        rs[1].assertValue(v1);
2539 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2540 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2541 +        checkCompletedNormally(h2, null);
2542 +        checkCompletedNormally(h3, null);
2543 +        rs[2].assertValue(v1);
2544 +        rs[3].assertValue(v1);
2545 +        g.complete(v2);
2546 +
2547 +        // unspecified behavior - both source completions available
2548 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2549 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2550 +        checkCompletedNormally(h4, null);
2551 +        checkCompletedNormally(h5, null);
2552 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2553 +                   Objects.equals(v2, rs[4].value));
2554 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2555 +                   Objects.equals(v2, rs[5].value));
2556 +
2557 +        checkCompletedNormally(f, v1);
2558 +        checkCompletedNormally(g, v2);
2559 +        checkCompletedNormally(h0, null);
2560 +        checkCompletedNormally(h1, null);
2561 +        checkCompletedNormally(h2, null);
2562 +        checkCompletedNormally(h3, null);
2563 +        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2564 +    }}
2565 +
2566 +    /**
2567 +     * acceptEither result completes exceptionally after exceptional
2568 +     * completion of either source
2569 +     */
2570 +    public void testAcceptEither_exceptionalCompletion() {
2571 +        for (ExecutionMode m : ExecutionMode.values())
2572 +        for (Integer v1 : new Integer[] { 1, null })
2573 +    {
2574 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2575 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2576 +        final CFException ex = new CFException();
2577 +        final NoopConsumer[] rs = new NoopConsumer[6];
2578 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2579 +
2580 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2581 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2582 +        checkIncomplete(h0);
2583 +        checkIncomplete(h1);
2584 +        rs[0].assertNotInvoked();
2585 +        rs[1].assertNotInvoked();
2586 +        f.completeExceptionally(ex);
2587 +        checkCompletedWithWrappedException(h0, ex);
2588 +        checkCompletedWithWrappedException(h1, ex);
2589 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2590 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2591 +        checkCompletedWithWrappedException(h2, ex);
2592 +        checkCompletedWithWrappedException(h3, ex);
2593 +
2594 +        g.complete(v1);
2595 +
2596 +        // unspecified behavior - both source completions available
2597 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2598 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2599 +        try {
2600 +            assertNull(h4.join());
2601 +            rs[4].assertValue(v1);
2602 +        } catch (CompletionException ok) {
2603 +            checkCompletedWithWrappedException(h4, ex);
2604 +            rs[4].assertNotInvoked();
2605 +        }
2606 +        try {
2607 +            assertNull(h5.join());
2608 +            rs[5].assertValue(v1);
2609 +        } catch (CompletionException ok) {
2610 +            checkCompletedWithWrappedException(h5, ex);
2611 +            rs[5].assertNotInvoked();
2612 +        }
2613 +
2614 +        checkCompletedExceptionally(f, ex);
2615 +        checkCompletedNormally(g, v1);
2616 +        checkCompletedWithWrappedException(h0, ex);
2617 +        checkCompletedWithWrappedException(h1, ex);
2618 +        checkCompletedWithWrappedException(h2, ex);
2619 +        checkCompletedWithWrappedException(h3, ex);
2620 +        checkCompletedWithWrappedException(h4, ex);
2621 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2622 +    }}
2623 +
2624 +    public void testAcceptEither_exceptionalCompletion2() {
2625 +        for (ExecutionMode m : ExecutionMode.values())
2626 +        for (boolean fFirst : new boolean[] { true, false })
2627 +        for (Integer v1 : new Integer[] { 1, null })
2628 +    {
2629 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2630 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2631 +        final CFException ex = new CFException();
2632 +        final NoopConsumer[] rs = new NoopConsumer[6];
2633 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2634 +
2635 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2636 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2637 +        assertTrue(fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2638 +        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2639 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2640 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2641 +
2642 +        // unspecified behavior - both source completions available
2643 +        try {
2644 +            assertNull(h0.join());
2645 +            rs[0].assertValue(v1);
2646 +        } catch (CompletionException ok) {
2647 +            checkCompletedWithWrappedException(h0, ex);
2648 +            rs[0].assertNotInvoked();
2649 +        }
2650 +        try {
2651 +            assertNull(h1.join());
2652 +            rs[1].assertValue(v1);
2653 +        } catch (CompletionException ok) {
2654 +            checkCompletedWithWrappedException(h1, ex);
2655 +            rs[1].assertNotInvoked();
2656 +        }
2657 +        try {
2658 +            assertNull(h2.join());
2659 +            rs[2].assertValue(v1);
2660 +        } catch (CompletionException ok) {
2661 +            checkCompletedWithWrappedException(h2, ex);
2662 +            rs[2].assertNotInvoked();
2663 +        }
2664 +        try {
2665 +            assertNull(h3.join());
2666 +            rs[3].assertValue(v1);
2667 +        } catch (CompletionException ok) {
2668 +            checkCompletedWithWrappedException(h3, ex);
2669 +            rs[3].assertNotInvoked();
2670 +        }
2671 +
2672 +        checkCompletedNormally(f, v1);
2673 +        checkCompletedExceptionally(g, ex);
2674 +    }}
2675 +
2676 +    /**
2677 +     * acceptEither result completes exceptionally if either source cancelled
2678 +     */
2679 +    public void testAcceptEither_sourceCancelled() {
2680 +        for (ExecutionMode m : ExecutionMode.values())
2681 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2682 +        for (Integer v1 : new Integer[] { 1, null })
2683 +    {
2684 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2685 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2686 +        final NoopConsumer[] rs = new NoopConsumer[6];
2687 +        for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
2688 +
2689 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2690 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2691 +        checkIncomplete(h0);
2692 +        checkIncomplete(h1);
2693 +        rs[0].assertNotInvoked();
2694 +        rs[1].assertNotInvoked();
2695 +        f.cancel(mayInterruptIfRunning);
2696 +        checkCompletedWithWrappedCancellationException(h0);
2697 +        checkCompletedWithWrappedCancellationException(h1);
2698 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2699 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2700 +        checkCompletedWithWrappedCancellationException(h2);
2701 +        checkCompletedWithWrappedCancellationException(h3);
2702 +
2703 +        g.complete(v1);
2704 +
2705 +        // unspecified behavior - both source completions available
2706 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2707 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2708 +        try {
2709 +            assertNull(h4.join());
2710 +            rs[4].assertValue(v1);
2711 +        } catch (CompletionException ok) {
2712 +            checkCompletedWithWrappedCancellationException(h4);
2713 +            rs[4].assertNotInvoked();
2714 +        }
2715 +        try {
2716 +            assertNull(h5.join());
2717 +            rs[5].assertValue(v1);
2718 +        } catch (CompletionException ok) {
2719 +            checkCompletedWithWrappedCancellationException(h5);
2720 +            rs[5].assertNotInvoked();
2721 +        }
2722 +
2723 +        checkCancelled(f);
2724 +        checkCompletedNormally(g, v1);
2725 +        checkCompletedWithWrappedCancellationException(h0);
2726 +        checkCompletedWithWrappedCancellationException(h1);
2727 +        checkCompletedWithWrappedCancellationException(h2);
2728 +        checkCompletedWithWrappedCancellationException(h3);
2729 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2730 +    }}
2731 +
2732 +    /**
2733 +     * acceptEither result completes exceptionally if action does
2734 +     */
2735 +    public void testAcceptEither_actionFailed() {
2736 +        for (ExecutionMode m : ExecutionMode.values())
2737 +        for (Integer v1 : new Integer[] { 1, null })
2738 +        for (Integer v2 : new Integer[] { 2, null })
2739 +    {
2740 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2741 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2742 +        final FailingConsumer[] rs = new FailingConsumer[6];
2743 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
2744 +
2745 +        final CompletableFuture<Void> h0 = m.acceptEither(f, g, rs[0]);
2746 +        final CompletableFuture<Void> h1 = m.acceptEither(g, f, rs[1]);
2747 +        f.complete(v1);
2748 +        final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2749 +        final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2750 +        checkCompletedWithWrappedException(h0, rs[0].ex);
2751 +        checkCompletedWithWrappedException(h1, rs[1].ex);
2752 +        checkCompletedWithWrappedException(h2, rs[2].ex);
2753 +        checkCompletedWithWrappedException(h3, rs[3].ex);
2754 +        for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2755 +
2756 +        g.complete(v2);
2757 +
2758 +        // unspecified behavior - both source completions available
2759 +        final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2760 +        final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2761 +
2762 +        checkCompletedWithWrappedException(h4, rs[4].ex);
2763 +        assertTrue(Objects.equals(v1, rs[4].value) ||
2764 +                   Objects.equals(v2, rs[4].value));
2765 +        checkCompletedWithWrappedException(h5, rs[5].ex);
2766 +        assertTrue(Objects.equals(v1, rs[5].value) ||
2767 +                   Objects.equals(v2, rs[5].value));
2768 +
2769 +        checkCompletedNormally(f, v1);
2770 +        checkCompletedNormally(g, v2);
2771 +    }}
2772 +
2773 +    /**
2774 +     * runAfterEither result completes normally after normal completion
2775 +     * of either source
2776 +     */
2777 +    public void testRunAfterEither_normalCompletion() {
2778 +        for (ExecutionMode m : ExecutionMode.values())
2779 +        for (Integer v1 : new Integer[] { 1, null })
2780 +        for (Integer v2 : new Integer[] { 2, null })
2781 +        for (boolean pushNop : new boolean[] { true, false })
2782 +    {
2783 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2784 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2785 +        final Noop[] rs = new Noop[6];
2786 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2787 +
2788 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2789 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2790 +        checkIncomplete(h0);
2791 +        checkIncomplete(h1);
2792 +        rs[0].assertNotInvoked();
2793 +        rs[1].assertNotInvoked();
2794 +        if (pushNop) {          // ad hoc test of intra-completion interference
2795 +            m.thenRun(f, () -> {});
2796 +            m.thenRun(g, () -> {});
2797 +        }
2798 +        f.complete(v1);
2799 +        checkCompletedNormally(h0, null);
2800 +        checkCompletedNormally(h1, null);
2801 +        rs[0].assertInvoked();
2802 +        rs[1].assertInvoked();
2803 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2804 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2805 +        checkCompletedNormally(h2, null);
2806 +        checkCompletedNormally(h3, null);
2807 +        rs[2].assertInvoked();
2808 +        rs[3].assertInvoked();
2809 +
2810 +        g.complete(v2);
2811 +
2812 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2813 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2814 +
2815 +        checkCompletedNormally(f, v1);
2816 +        checkCompletedNormally(g, v2);
2817 +        checkCompletedNormally(h0, null);
2818 +        checkCompletedNormally(h1, null);
2819 +        checkCompletedNormally(h2, null);
2820 +        checkCompletedNormally(h3, null);
2821 +        checkCompletedNormally(h4, null);
2822 +        checkCompletedNormally(h5, null);
2823 +        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
2824 +    }}
2825 +
2826 +    /**
2827 +     * runAfterEither result completes exceptionally after exceptional
2828 +     * completion of either source
2829 +     */
2830 +    public void testRunAfterEither_exceptionalCompletion() {
2831 +        for (ExecutionMode m : ExecutionMode.values())
2832 +        for (Integer v1 : new Integer[] { 1, null })
2833 +    {
2834 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2835 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2836 +        final CFException ex = new CFException();
2837 +        final Noop[] rs = new Noop[6];
2838 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2839 +
2840 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2841 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2842 +        checkIncomplete(h0);
2843 +        checkIncomplete(h1);
2844 +        rs[0].assertNotInvoked();
2845 +        rs[1].assertNotInvoked();
2846 +        assertTrue(f.completeExceptionally(ex));
2847 +        checkCompletedWithWrappedException(h0, ex);
2848 +        checkCompletedWithWrappedException(h1, ex);
2849 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2850 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2851 +        checkCompletedWithWrappedException(h2, ex);
2852 +        checkCompletedWithWrappedException(h3, ex);
2853 +
2854 +        assertTrue(g.complete(v1));
2855 +
2856 +        // unspecified behavior - both source completions available
2857 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2858 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2859 +        try {
2860 +            assertNull(h4.join());
2861 +            rs[4].assertInvoked();
2862 +        } catch (CompletionException ok) {
2863 +            checkCompletedWithWrappedException(h4, ex);
2864 +            rs[4].assertNotInvoked();
2865 +        }
2866 +        try {
2867 +            assertNull(h5.join());
2868 +            rs[5].assertInvoked();
2869 +        } catch (CompletionException ok) {
2870 +            checkCompletedWithWrappedException(h5, ex);
2871 +            rs[5].assertNotInvoked();
2872 +        }
2873 +
2874 +        checkCompletedExceptionally(f, ex);
2875 +        checkCompletedNormally(g, v1);
2876 +        checkCompletedWithWrappedException(h0, ex);
2877 +        checkCompletedWithWrappedException(h1, ex);
2878 +        checkCompletedWithWrappedException(h2, ex);
2879 +        checkCompletedWithWrappedException(h3, ex);
2880 +        checkCompletedWithWrappedException(h4, ex);
2881 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2882 +    }}
2883 +
2884 +    public void testRunAfterEither_exceptionalCompletion2() {
2885 +        for (ExecutionMode m : ExecutionMode.values())
2886 +        for (boolean fFirst : new boolean[] { true, false })
2887 +        for (Integer v1 : new Integer[] { 1, null })
2888 +    {
2889 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2890 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2891 +        final CFException ex = new CFException();
2892 +        final Noop[] rs = new Noop[6];
2893 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2894 +
2895 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2896 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2897 +        assertTrue( fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2898 +        assertTrue(!fFirst ? f.complete(v1) : g.completeExceptionally(ex));
2899 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2900 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2901 +
2902 +        // unspecified behavior - both source completions available
2903 +        try {
2904 +            assertNull(h0.join());
2905 +            rs[0].assertInvoked();
2906 +        } catch (CompletionException ok) {
2907 +            checkCompletedWithWrappedException(h0, ex);
2908 +            rs[0].assertNotInvoked();
2909 +        }
2910 +        try {
2911 +            assertNull(h1.join());
2912 +            rs[1].assertInvoked();
2913 +        } catch (CompletionException ok) {
2914 +            checkCompletedWithWrappedException(h1, ex);
2915 +            rs[1].assertNotInvoked();
2916 +        }
2917 +        try {
2918 +            assertNull(h2.join());
2919 +            rs[2].assertInvoked();
2920 +        } catch (CompletionException ok) {
2921 +            checkCompletedWithWrappedException(h2, ex);
2922 +            rs[2].assertNotInvoked();
2923 +        }
2924 +        try {
2925 +            assertNull(h3.join());
2926 +            rs[3].assertInvoked();
2927 +        } catch (CompletionException ok) {
2928 +            checkCompletedWithWrappedException(h3, ex);
2929 +            rs[3].assertNotInvoked();
2930 +        }
2931 +
2932 +        checkCompletedNormally(f, v1);
2933 +        checkCompletedExceptionally(g, ex);
2934 +    }}
2935 +
2936 +    /**
2937 +     * runAfterEither result completes exceptionally if either source cancelled
2938 +     */
2939 +    public void testRunAfterEither_sourceCancelled() {
2940 +        for (ExecutionMode m : ExecutionMode.values())
2941 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
2942 +        for (Integer v1 : new Integer[] { 1, null })
2943 +    {
2944 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
2945 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
2946 +        final Noop[] rs = new Noop[6];
2947 +        for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
2948 +
2949 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
2950 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
2951 +        checkIncomplete(h0);
2952 +        checkIncomplete(h1);
2953 +        rs[0].assertNotInvoked();
2954 +        rs[1].assertNotInvoked();
2955 +        f.cancel(mayInterruptIfRunning);
2956 +        checkCompletedWithWrappedCancellationException(h0);
2957 +        checkCompletedWithWrappedCancellationException(h1);
2958 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2959 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2960 +        checkCompletedWithWrappedCancellationException(h2);
2961 +        checkCompletedWithWrappedCancellationException(h3);
2962 +
2963 +        assertTrue(g.complete(v1));
2964 +
2965 +        // unspecified behavior - both source completions available
2966 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2967 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2968 +        try {
2969 +            assertNull(h4.join());
2970 +            rs[4].assertInvoked();
2971 +        } catch (CompletionException ok) {
2972 +            checkCompletedWithWrappedCancellationException(h4);
2973 +            rs[4].assertNotInvoked();
2974 +        }
2975 +        try {
2976 +            assertNull(h5.join());
2977 +            rs[5].assertInvoked();
2978 +        } catch (CompletionException ok) {
2979 +            checkCompletedWithWrappedCancellationException(h5);
2980 +            rs[5].assertNotInvoked();
2981 +        }
2982 +
2983 +        checkCancelled(f);
2984 +        checkCompletedNormally(g, v1);
2985 +        checkCompletedWithWrappedCancellationException(h0);
2986 +        checkCompletedWithWrappedCancellationException(h1);
2987 +        checkCompletedWithWrappedCancellationException(h2);
2988 +        checkCompletedWithWrappedCancellationException(h3);
2989 +        for (int i = 0; i < 4; i++) rs[i].assertNotInvoked();
2990 +    }}
2991 +
2992 +    /**
2993 +     * runAfterEither result completes exceptionally if action does
2994 +     */
2995 +    public void testRunAfterEither_actionFailed() {
2996 +        for (ExecutionMode m : ExecutionMode.values())
2997 +        for (Integer v1 : new Integer[] { 1, null })
2998 +        for (Integer v2 : new Integer[] { 2, null })
2999 +    {
3000 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3001 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
3002 +        final FailingRunnable[] rs = new FailingRunnable[6];
3003 +        for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
3004 +
3005 +        final CompletableFuture<Void> h0 = m.runAfterEither(f, g, rs[0]);
3006 +        final CompletableFuture<Void> h1 = m.runAfterEither(g, f, rs[1]);
3007 +        assertTrue(f.complete(v1));
3008 +        final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
3009 +        final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
3010 +        checkCompletedWithWrappedException(h0, rs[0].ex);
3011 +        checkCompletedWithWrappedException(h1, rs[1].ex);
3012 +        checkCompletedWithWrappedException(h2, rs[2].ex);
3013 +        checkCompletedWithWrappedException(h3, rs[3].ex);
3014 +        for (int i = 0; i < 4; i++) rs[i].assertInvoked();
3015 +        assertTrue(g.complete(v2));
3016 +        final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
3017 +        final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
3018 +        checkCompletedWithWrappedException(h4, rs[4].ex);
3019 +        checkCompletedWithWrappedException(h5, rs[5].ex);
3020 +
3021 +        checkCompletedNormally(f, v1);
3022 +        checkCompletedNormally(g, v2);
3023 +        for (int i = 0; i < 6; i++) rs[i].assertInvoked();
3024 +    }}
3025 +
3026 +    /**
3027 +     * thenCompose result completes normally after normal completion of source
3028 +     */
3029 +    public void testThenCompose_normalCompletion() {
3030 +        for (ExecutionMode m : ExecutionMode.values())
3031 +        for (boolean createIncomplete : new boolean[] { true, false })
3032 +        for (Integer v1 : new Integer[] { 1, null })
3033 +    {
3034 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3035 +        final CompletableFutureInc r = new CompletableFutureInc(m);
3036 +        if (!createIncomplete) assertTrue(f.complete(v1));
3037 +        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3038 +        if (createIncomplete) assertTrue(f.complete(v1));
3039 +
3040 +        checkCompletedNormally(g, inc(v1));
3041 +        checkCompletedNormally(f, v1);
3042 +        r.assertValue(v1);
3043 +    }}
3044 +
3045 +    /**
3046 +     * thenCompose result completes exceptionally after exceptional
3047 +     * completion of source
3048 +     */
3049 +    public void testThenCompose_exceptionalCompletion() {
3050 +        for (ExecutionMode m : ExecutionMode.values())
3051 +        for (boolean createIncomplete : new boolean[] { true, false })
3052 +    {
3053 +        final CFException ex = new CFException();
3054 +        final CompletableFutureInc r = new CompletableFutureInc(m);
3055 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3056 +        if (!createIncomplete) f.completeExceptionally(ex);
3057 +        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3058 +        if (createIncomplete) f.completeExceptionally(ex);
3059 +
3060 +        checkCompletedWithWrappedException(g, ex);
3061 +        checkCompletedExceptionally(f, ex);
3062 +        r.assertNotInvoked();
3063 +    }}
3064 +
3065 +    /**
3066 +     * thenCompose result completes exceptionally if action does
3067 +     */
3068 +    public void testThenCompose_actionFailed() {
3069 +        for (ExecutionMode m : ExecutionMode.values())
3070 +        for (boolean createIncomplete : new boolean[] { true, false })
3071 +        for (Integer v1 : new Integer[] { 1, null })
3072 +    {
3073 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3074 +        final FailingCompletableFutureFunction r
3075 +            = new FailingCompletableFutureFunction(m);
3076 +        if (!createIncomplete) assertTrue(f.complete(v1));
3077 +        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3078 +        if (createIncomplete) assertTrue(f.complete(v1));
3079 +
3080 +        checkCompletedWithWrappedException(g, r.ex);
3081 +        checkCompletedNormally(f, v1);
3082 +    }}
3083 +
3084 +    /**
3085 +     * thenCompose result completes exceptionally if source cancelled
3086 +     */
3087 +    public void testThenCompose_sourceCancelled() {
3088 +        for (ExecutionMode m : ExecutionMode.values())
3089 +        for (boolean createIncomplete : new boolean[] { true, false })
3090 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3091 +    {
3092 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3093 +        final CompletableFutureInc r = new CompletableFutureInc(m);
3094 +        if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
3095 +        final CompletableFuture<Integer> g = m.thenCompose(f, r);
3096 +        if (createIncomplete) {
3097 +            checkIncomplete(g);
3098 +            assertTrue(f.cancel(mayInterruptIfRunning));
3099 +        }
3100 +
3101 +        checkCompletedWithWrappedCancellationException(g);
3102 +        checkCancelled(f);
3103 +    }}
3104 +
3105 +    /**
3106 +     * thenCompose result completes exceptionally if the result of the action does
3107 +     */
3108 +    public void testThenCompose_actionReturnsFailingFuture() {
3109 +        for (ExecutionMode m : ExecutionMode.values())
3110 +        for (int order = 0; order < 6; order++)
3111 +        for (Integer v1 : new Integer[] { 1, null })
3112 +    {
3113 +        final CFException ex = new CFException();
3114 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3115 +        final CompletableFuture<Integer> g = new CompletableFuture<>();
3116 +        final CompletableFuture<Integer> h;
3117 +        // Test all permutations of orders
3118 +        switch (order) {
3119 +        case 0:
3120 +            assertTrue(f.complete(v1));
3121 +            assertTrue(g.completeExceptionally(ex));
3122 +            h = m.thenCompose(f, (x -> g));
3123 +            break;
3124 +        case 1:
3125 +            assertTrue(f.complete(v1));
3126 +            h = m.thenCompose(f, (x -> g));
3127 +            assertTrue(g.completeExceptionally(ex));
3128 +            break;
3129 +        case 2:
3130 +            assertTrue(g.completeExceptionally(ex));
3131 +            assertTrue(f.complete(v1));
3132 +            h = m.thenCompose(f, (x -> g));
3133 +            break;
3134 +        case 3:
3135 +            assertTrue(g.completeExceptionally(ex));
3136 +            h = m.thenCompose(f, (x -> g));
3137 +            assertTrue(f.complete(v1));
3138 +            break;
3139 +        case 4:
3140 +            h = m.thenCompose(f, (x -> g));
3141 +            assertTrue(f.complete(v1));
3142 +            assertTrue(g.completeExceptionally(ex));
3143 +            break;
3144 +        case 5:
3145 +            h = m.thenCompose(f, (x -> g));
3146 +            assertTrue(f.complete(v1));
3147 +            assertTrue(g.completeExceptionally(ex));
3148 +            break;
3149 +        default: throw new AssertionError();
3150 +        }
3151 +
3152 +        checkCompletedExceptionally(g, ex);
3153 +        checkCompletedWithWrappedException(h, ex);
3154 +        checkCompletedNormally(f, v1);
3155 +    }}
3156 +
3157 +    /**
3158 +     * exceptionallyCompose result completes normally after normal
3159 +     * completion of source
3160 +     */
3161 +    public void testExceptionallyCompose_normalCompletion() {
3162 +        for (ExecutionMode m : ExecutionMode.values())
3163 +        for (boolean createIncomplete : new boolean[] { true, false })
3164 +        for (Integer v1 : new Integer[] { 1, null })
3165 +    {
3166 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3167 +        final ExceptionalCompletableFutureFunction r =
3168 +            new ExceptionalCompletableFutureFunction(m);
3169 +        if (!createIncomplete) assertTrue(f.complete(v1));
3170 +        final CompletableFuture<Integer> g = m.exceptionallyCompose(f, r);
3171 +        if (createIncomplete) assertTrue(f.complete(v1));
3172 +
3173 +        checkCompletedNormally(f, v1);
3174 +        checkCompletedNormally(g, v1);
3175 +        r.assertNotInvoked();
3176 +    }}
3177 +
3178 +    /**
3179 +     * exceptionallyCompose result completes normally after exceptional
3180 +     * completion of source
3181 +     */
3182 +    public void testExceptionallyCompose_exceptionalCompletion() {
3183 +        for (ExecutionMode m : ExecutionMode.values())
3184 +        for (boolean createIncomplete : new boolean[] { true, false })
3185 +    {
3186 +        final CFException ex = new CFException();
3187 +        final ExceptionalCompletableFutureFunction r =
3188 +            new ExceptionalCompletableFutureFunction(m);
3189 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3190 +        if (!createIncomplete) f.completeExceptionally(ex);
3191 +        final CompletableFuture<Integer> g = m.exceptionallyCompose(f, r);
3192 +        if (createIncomplete) f.completeExceptionally(ex);
3193 +
3194 +        checkCompletedExceptionally(f, ex);
3195 +        checkCompletedNormally(g, r.value);
3196 +        r.assertInvoked();
3197 +    }}
3198 +
3199 +    /**
3200 +     * exceptionallyCompose completes exceptionally on exception if action does
3201 +     */
3202 +    public void testExceptionallyCompose_actionFailed() {
3203 +        for (ExecutionMode m : ExecutionMode.values())
3204 +        for (boolean createIncomplete : new boolean[] { true, false })
3205 +        for (Integer v1 : new Integer[] { 1, null })
3206 +    {
3207 +        final CFException ex = new CFException();
3208 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
3209 +        final FailingExceptionalCompletableFutureFunction r
3210 +            = new FailingExceptionalCompletableFutureFunction(m);
3211 +        if (!createIncomplete) f.completeExceptionally(ex);
3212 +        final CompletableFuture<Integer> g = m.exceptionallyCompose(f, r);
3213 +        if (createIncomplete) f.completeExceptionally(ex);
3214 +
3215 +        checkCompletedExceptionally(f, ex);
3216 +        checkCompletedWithWrappedException(g, r.ex);
3217 +        r.assertInvoked();
3218 +    }}
3219 +
3220 +
3221 +    // other static methods
3222 +
3223      /**
3224       * allOf(no component futures) returns a future completed normally
3225       * with the value null
3226       */
3227      public void testAllOf_empty() throws Exception {
3228 <        CompletableFuture<?> f = CompletableFuture.allOf();
3228 >        CompletableFuture<Void> f = CompletableFuture.allOf();
3229          checkCompletedNormally(f, null);
3230      }
3231  
3232      /**
3233 +     * allOf returns a future completed normally with the value null
3234 +     * when all components complete normally
3235 +     */
3236 +    public void testAllOf_normal() throws Exception {
3237 +        for (int k = 1; k < 10; k++) {
3238 +            CompletableFuture<Integer>[] fs
3239 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3240 +            for (int i = 0; i < k; i++)
3241 +                fs[i] = new CompletableFuture<>();
3242 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3243 +            for (int i = 0; i < k; i++) {
3244 +                checkIncomplete(f);
3245 +                checkIncomplete(CompletableFuture.allOf(fs));
3246 +                fs[i].complete(one);
3247 +            }
3248 +            checkCompletedNormally(f, null);
3249 +            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3250 +        }
3251 +    }
3252 +
3253 +    public void testAllOf_normal_backwards() throws Exception {
3254 +        for (int k = 1; k < 10; k++) {
3255 +            CompletableFuture<Integer>[] fs
3256 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3257 +            for (int i = 0; i < k; i++)
3258 +                fs[i] = new CompletableFuture<>();
3259 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3260 +            for (int i = k - 1; i >= 0; i--) {
3261 +                checkIncomplete(f);
3262 +                checkIncomplete(CompletableFuture.allOf(fs));
3263 +                fs[i].complete(one);
3264 +            }
3265 +            checkCompletedNormally(f, null);
3266 +            checkCompletedNormally(CompletableFuture.allOf(fs), null);
3267 +        }
3268 +    }
3269 +
3270 +    public void testAllOf_exceptional() throws Exception {
3271 +        for (int k = 1; k < 10; k++) {
3272 +            CompletableFuture<Integer>[] fs
3273 +                = (CompletableFuture<Integer>[]) new CompletableFuture[k];
3274 +            CFException ex = new CFException();
3275 +            for (int i = 0; i < k; i++)
3276 +                fs[i] = new CompletableFuture<>();
3277 +            CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3278 +            for (int i = 0; i < k; i++) {
3279 +                checkIncomplete(f);
3280 +                checkIncomplete(CompletableFuture.allOf(fs));
3281 +                if (i != k / 2) {
3282 +                    fs[i].complete(i);
3283 +                    checkCompletedNormally(fs[i], i);
3284 +                } else {
3285 +                    fs[i].completeExceptionally(ex);
3286 +                    checkCompletedExceptionally(fs[i], ex);
3287 +                }
3288 +            }
3289 +            checkCompletedWithWrappedException(f, ex);
3290 +            checkCompletedWithWrappedException(CompletableFuture.allOf(fs), ex);
3291 +        }
3292 +    }
3293 +
3294 +    /**
3295       * anyOf(no component futures) returns an incomplete future
3296       */
3297      public void testAnyOf_empty() throws Exception {
3298 <        CompletableFuture<?> f = CompletableFuture.anyOf();
3298 >        for (Integer v1 : new Integer[] { 1, null })
3299 >    {
3300 >        CompletableFuture<Object> f = CompletableFuture.anyOf();
3301 >        checkIncomplete(f);
3302 >
3303 >        f.complete(v1);
3304 >        checkCompletedNormally(f, v1);
3305 >    }}
3306 >
3307 >    /**
3308 >     * anyOf returns a future completed normally with a value when
3309 >     * a component future does
3310 >     */
3311 >    public void testAnyOf_normal() throws Exception {
3312 >        for (int k = 0; k < 10; k++) {
3313 >            CompletableFuture[] fs = new CompletableFuture[k];
3314 >            for (int i = 0; i < k; i++)
3315 >                fs[i] = new CompletableFuture<>();
3316 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3317 >            checkIncomplete(f);
3318 >            for (int i = 0; i < k; i++) {
3319 >                fs[i].complete(i);
3320 >                checkCompletedNormally(f, 0);
3321 >                int x = (int) CompletableFuture.anyOf(fs).join();
3322 >                assertTrue(0 <= x && x <= i);
3323 >            }
3324 >        }
3325 >    }
3326 >    public void testAnyOf_normal_backwards() throws Exception {
3327 >        for (int k = 0; k < 10; k++) {
3328 >            CompletableFuture[] fs = new CompletableFuture[k];
3329 >            for (int i = 0; i < k; i++)
3330 >                fs[i] = new CompletableFuture<>();
3331 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3332 >            checkIncomplete(f);
3333 >            for (int i = k - 1; i >= 0; i--) {
3334 >                fs[i].complete(i);
3335 >                checkCompletedNormally(f, k - 1);
3336 >                int x = (int) CompletableFuture.anyOf(fs).join();
3337 >                assertTrue(i <= x && x <= k - 1);
3338 >            }
3339 >        }
3340 >    }
3341 >
3342 >    /**
3343 >     * anyOf result completes exceptionally when any component does.
3344 >     */
3345 >    public void testAnyOf_exceptional() throws Exception {
3346 >        for (int k = 0; k < 10; k++) {
3347 >            CompletableFuture[] fs = new CompletableFuture[k];
3348 >            CFException[] exs = new CFException[k];
3349 >            for (int i = 0; i < k; i++) {
3350 >                fs[i] = new CompletableFuture<>();
3351 >                exs[i] = new CFException();
3352 >            }
3353 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3354 >            checkIncomplete(f);
3355 >            for (int i = 0; i < k; i++) {
3356 >                fs[i].completeExceptionally(exs[i]);
3357 >                checkCompletedWithWrappedException(f, exs[0]);
3358 >                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3359 >            }
3360 >        }
3361 >    }
3362 >
3363 >    public void testAnyOf_exceptional_backwards() throws Exception {
3364 >        for (int k = 0; k < 10; k++) {
3365 >            CompletableFuture[] fs = new CompletableFuture[k];
3366 >            CFException[] exs = new CFException[k];
3367 >            for (int i = 0; i < k; i++) {
3368 >                fs[i] = new CompletableFuture<>();
3369 >                exs[i] = new CFException();
3370 >            }
3371 >            CompletableFuture<Object> f = CompletableFuture.anyOf(fs);
3372 >            checkIncomplete(f);
3373 >            for (int i = k - 1; i >= 0; i--) {
3374 >                fs[i].completeExceptionally(exs[i]);
3375 >                checkCompletedWithWrappedException(f, exs[k - 1]);
3376 >                checkCompletedWithWrappedCFException(CompletableFuture.anyOf(fs));
3377 >            }
3378 >        }
3379 >    }
3380 >
3381 >    /**
3382 >     * Completion methods throw NullPointerException with null arguments
3383 >     */
3384 >    @SuppressWarnings("FutureReturnValueIgnored")
3385 >    public void testNPE() {
3386 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3387 >        CompletableFuture<Integer> g = new CompletableFuture<>();
3388 >        CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
3389 >        ThreadExecutor exec = new ThreadExecutor();
3390 >
3391 >        Runnable[] throwingActions = {
3392 >            () -> CompletableFuture.supplyAsync(null),
3393 >            () -> CompletableFuture.supplyAsync(null, exec),
3394 >            () -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.SYNC, 42), null),
3395 >
3396 >            () -> CompletableFuture.runAsync(null),
3397 >            () -> CompletableFuture.runAsync(null, exec),
3398 >            () -> CompletableFuture.runAsync(() -> {}, null),
3399 >
3400 >            () -> f.completeExceptionally(null),
3401 >
3402 >            () -> f.thenApply(null),
3403 >            () -> f.thenApplyAsync(null),
3404 >            () -> f.thenApplyAsync(x -> x, null),
3405 >            () -> f.thenApplyAsync(null, exec),
3406 >
3407 >            () -> f.thenAccept(null),
3408 >            () -> f.thenAcceptAsync(null),
3409 >            () -> f.thenAcceptAsync(x -> {} , null),
3410 >            () -> f.thenAcceptAsync(null, exec),
3411 >
3412 >            () -> f.thenRun(null),
3413 >            () -> f.thenRunAsync(null),
3414 >            () -> f.thenRunAsync(() -> {} , null),
3415 >            () -> f.thenRunAsync(null, exec),
3416 >
3417 >            () -> f.thenCombine(g, null),
3418 >            () -> f.thenCombineAsync(g, null),
3419 >            () -> f.thenCombineAsync(g, null, exec),
3420 >            () -> f.thenCombine(nullFuture, (x, y) -> x),
3421 >            () -> f.thenCombineAsync(nullFuture, (x, y) -> x),
3422 >            () -> f.thenCombineAsync(nullFuture, (x, y) -> x, exec),
3423 >            () -> f.thenCombineAsync(g, (x, y) -> x, null),
3424 >
3425 >            () -> f.thenAcceptBoth(g, null),
3426 >            () -> f.thenAcceptBothAsync(g, null),
3427 >            () -> f.thenAcceptBothAsync(g, null, exec),
3428 >            () -> f.thenAcceptBoth(nullFuture, (x, y) -> {}),
3429 >            () -> f.thenAcceptBothAsync(nullFuture, (x, y) -> {}),
3430 >            () -> f.thenAcceptBothAsync(nullFuture, (x, y) -> {}, exec),
3431 >            () -> f.thenAcceptBothAsync(g, (x, y) -> {}, null),
3432 >
3433 >            () -> f.runAfterBoth(g, null),
3434 >            () -> f.runAfterBothAsync(g, null),
3435 >            () -> f.runAfterBothAsync(g, null, exec),
3436 >            () -> f.runAfterBoth(nullFuture, () -> {}),
3437 >            () -> f.runAfterBothAsync(nullFuture, () -> {}),
3438 >            () -> f.runAfterBothAsync(nullFuture, () -> {}, exec),
3439 >            () -> f.runAfterBothAsync(g, () -> {}, null),
3440 >
3441 >            () -> f.applyToEither(g, null),
3442 >            () -> f.applyToEitherAsync(g, null),
3443 >            () -> f.applyToEitherAsync(g, null, exec),
3444 >            () -> f.applyToEither(nullFuture, x -> x),
3445 >            () -> f.applyToEitherAsync(nullFuture, x -> x),
3446 >            () -> f.applyToEitherAsync(nullFuture, x -> x, exec),
3447 >            () -> f.applyToEitherAsync(g, x -> x, null),
3448 >
3449 >            () -> f.acceptEither(g, null),
3450 >            () -> f.acceptEitherAsync(g, null),
3451 >            () -> f.acceptEitherAsync(g, null, exec),
3452 >            () -> f.acceptEither(nullFuture, x -> {}),
3453 >            () -> f.acceptEitherAsync(nullFuture, x -> {}),
3454 >            () -> f.acceptEitherAsync(nullFuture, x -> {}, exec),
3455 >            () -> f.acceptEitherAsync(g, x -> {}, null),
3456 >
3457 >            () -> f.runAfterEither(g, null),
3458 >            () -> f.runAfterEitherAsync(g, null),
3459 >            () -> f.runAfterEitherAsync(g, null, exec),
3460 >            () -> f.runAfterEither(nullFuture, () -> {}),
3461 >            () -> f.runAfterEitherAsync(nullFuture, () -> {}),
3462 >            () -> f.runAfterEitherAsync(nullFuture, () -> {}, exec),
3463 >            () -> f.runAfterEitherAsync(g, () -> {}, null),
3464 >
3465 >            () -> f.thenCompose(null),
3466 >            () -> f.thenComposeAsync(null),
3467 >            () -> f.thenComposeAsync(new CompletableFutureInc(ExecutionMode.EXECUTOR), null),
3468 >            () -> f.thenComposeAsync(null, exec),
3469 >
3470 >            () -> f.exceptionally(null),
3471 >
3472 >            () -> f.handle(null),
3473 >
3474 >            () -> CompletableFuture.allOf((CompletableFuture<?>)null),
3475 >            () -> CompletableFuture.allOf((CompletableFuture<?>[])null),
3476 >            () -> CompletableFuture.allOf(f, null),
3477 >            () -> CompletableFuture.allOf(null, f),
3478 >
3479 >            () -> CompletableFuture.anyOf((CompletableFuture<?>)null),
3480 >            () -> CompletableFuture.anyOf((CompletableFuture<?>[])null),
3481 >            () -> CompletableFuture.anyOf(f, null),
3482 >            () -> CompletableFuture.anyOf(null, f),
3483 >
3484 >            () -> f.obtrudeException(null),
3485 >
3486 >            () -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3487 >            () -> CompletableFuture.delayedExecutor(1L, null, exec),
3488 >            () -> CompletableFuture.delayedExecutor(1L, null),
3489 >
3490 >            () -> f.orTimeout(1L, null),
3491 >            () -> f.completeOnTimeout(42, 1L, null),
3492 >
3493 >            () -> CompletableFuture.failedFuture(null),
3494 >            () -> CompletableFuture.failedStage(null),
3495 >        };
3496 >
3497 >        assertThrows(NullPointerException.class, throwingActions);
3498 >        assertEquals(0, exec.count.get());
3499 >    }
3500 >
3501 >    /**
3502 >     * Test submissions to an executor that rejects all tasks.
3503 >     */
3504 >    public void testRejectingExecutor() {
3505 >        for (Integer v : new Integer[] { 1, null })
3506 >    {
3507 >        final CountingRejectingExecutor e = new CountingRejectingExecutor();
3508 >
3509 >        final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3510 >        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3511 >
3512 >        List<CompletableFuture<?>> futures = new ArrayList<>();
3513 >
3514 >        List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3515 >        srcs.add(complete);
3516 >        srcs.add(incomplete);
3517 >
3518 >        for (CompletableFuture<Integer> src : srcs) {
3519 >            List<CompletableFuture<?>> fs = new ArrayList<>();
3520 >            fs.add(src.thenRunAsync(() -> {}, e));
3521 >            fs.add(src.thenAcceptAsync(z -> {}, e));
3522 >            fs.add(src.thenApplyAsync(z -> z, e));
3523 >
3524 >            fs.add(src.thenCombineAsync(src, (x, y) -> x, e));
3525 >            fs.add(src.thenAcceptBothAsync(src, (x, y) -> {}, e));
3526 >            fs.add(src.runAfterBothAsync(src, () -> {}, e));
3527 >
3528 >            fs.add(src.applyToEitherAsync(src, z -> z, e));
3529 >            fs.add(src.acceptEitherAsync(src, z -> {}, e));
3530 >            fs.add(src.runAfterEitherAsync(src, () -> {}, e));
3531 >
3532 >            fs.add(src.thenComposeAsync(z -> null, e));
3533 >            fs.add(src.whenCompleteAsync((z, t) -> {}, e));
3534 >            fs.add(src.handleAsync((z, t) -> null, e));
3535 >
3536 >            for (CompletableFuture<?> future : fs) {
3537 >                if (src.isDone())
3538 >                    checkCompletedWithWrappedException(future, e.ex);
3539 >                else
3540 >                    checkIncomplete(future);
3541 >            }
3542 >            futures.addAll(fs);
3543 >        }
3544 >
3545 >        {
3546 >            List<CompletableFuture<?>> fs = new ArrayList<>();
3547 >
3548 >            fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3549 >            fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3550 >
3551 >            fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3552 >            fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3553 >
3554 >            fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3555 >            fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3556 >
3557 >            for (CompletableFuture<?> future : fs)
3558 >                checkIncomplete(future);
3559 >            futures.addAll(fs);
3560 >        }
3561 >
3562 >        {
3563 >            List<CompletableFuture<?>> fs = new ArrayList<>();
3564 >
3565 >            fs.add(complete.applyToEitherAsync(incomplete, z -> z, e));
3566 >            fs.add(incomplete.applyToEitherAsync(complete, z -> z, e));
3567 >
3568 >            fs.add(complete.acceptEitherAsync(incomplete, z -> {}, e));
3569 >            fs.add(incomplete.acceptEitherAsync(complete, z -> {}, e));
3570 >
3571 >            fs.add(complete.runAfterEitherAsync(incomplete, () -> {}, e));
3572 >            fs.add(incomplete.runAfterEitherAsync(complete, () -> {}, e));
3573 >
3574 >            for (CompletableFuture<?> future : fs)
3575 >                checkCompletedWithWrappedException(future, e.ex);
3576 >            futures.addAll(fs);
3577 >        }
3578 >
3579 >        incomplete.complete(v);
3580 >
3581 >        for (CompletableFuture<?> future : futures)
3582 >            checkCompletedWithWrappedException(future, e.ex);
3583 >
3584 >        assertEquals(futures.size(), e.count.get());
3585 >    }}
3586 >
3587 >    /**
3588 >     * Test submissions to an executor that rejects all tasks, but
3589 >     * should never be invoked because the dependent future is
3590 >     * explicitly completed.
3591 >     */
3592 >    public void testRejectingExecutorNeverInvoked() {
3593 >        for (Integer v : new Integer[] { 1, null })
3594 >    {
3595 >        final CountingRejectingExecutor e = new CountingRejectingExecutor();
3596 >
3597 >        final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3598 >        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3599 >
3600 >        List<CompletableFuture<?>> futures = new ArrayList<>();
3601 >
3602 >        List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3603 >        srcs.add(complete);
3604 >        srcs.add(incomplete);
3605 >
3606 >        List<CompletableFuture<?>> fs = new ArrayList<>();
3607 >        fs.add(incomplete.thenRunAsync(() -> {}, e));
3608 >        fs.add(incomplete.thenAcceptAsync(z -> {}, e));
3609 >        fs.add(incomplete.thenApplyAsync(z -> z, e));
3610 >
3611 >        fs.add(incomplete.thenCombineAsync(incomplete, (x, y) -> x, e));
3612 >        fs.add(incomplete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3613 >        fs.add(incomplete.runAfterBothAsync(incomplete, () -> {}, e));
3614 >
3615 >        fs.add(incomplete.applyToEitherAsync(incomplete, z -> z, e));
3616 >        fs.add(incomplete.acceptEitherAsync(incomplete, z -> {}, e));
3617 >        fs.add(incomplete.runAfterEitherAsync(incomplete, () -> {}, e));
3618 >
3619 >        fs.add(incomplete.thenComposeAsync(z -> null, e));
3620 >        fs.add(incomplete.whenCompleteAsync((z, t) -> {}, e));
3621 >        fs.add(incomplete.handleAsync((z, t) -> null, e));
3622 >
3623 >        fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3624 >        fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3625 >
3626 >        fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3627 >        fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3628 >
3629 >        fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3630 >        fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3631 >
3632 >        for (CompletableFuture<?> future : fs)
3633 >            checkIncomplete(future);
3634 >
3635 >        for (CompletableFuture<?> future : fs)
3636 >            future.complete(null);
3637 >
3638 >        incomplete.complete(v);
3639 >
3640 >        for (CompletableFuture<?> future : fs)
3641 >            checkCompletedNormally(future, null);
3642 >
3643 >        assertEquals(0, e.count.get());
3644 >    }}
3645 >
3646 >    /**
3647 >     * toCompletableFuture returns this CompletableFuture.
3648 >     */
3649 >    public void testToCompletableFuture() {
3650 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3651 >        assertSame(f, f.toCompletableFuture());
3652 >    }
3653 >
3654 >    // jdk9
3655 >
3656 >    /**
3657 >     * newIncompleteFuture returns an incomplete CompletableFuture
3658 >     */
3659 >    public void testNewIncompleteFuture() {
3660 >        for (Integer v1 : new Integer[] { 1, null })
3661 >    {
3662 >        CompletableFuture<Integer> f = new CompletableFuture<>();
3663 >        CompletableFuture<Integer> g = f.newIncompleteFuture();
3664          checkIncomplete(f);
3665 +        checkIncomplete(g);
3666 +        f.complete(v1);
3667 +        checkCompletedNormally(f, v1);
3668 +        checkIncomplete(g);
3669 +        g.complete(v1);
3670 +        checkCompletedNormally(g, v1);
3671 +        assertSame(g.getClass(), CompletableFuture.class);
3672 +    }}
3673 +
3674 +    /**
3675 +     * completedStage returns a completed CompletionStage
3676 +     */
3677 +    public void testCompletedStage() {
3678 +        AtomicInteger x = new AtomicInteger(0);
3679 +        AtomicReference<Throwable> r = new AtomicReference<>();
3680 +        CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3681 +        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3682 +        assertEquals(x.get(), 1);
3683 +        assertNull(r.get());
3684 +    }
3685 +
3686 +    /**
3687 +     * defaultExecutor by default returns the commonPool if
3688 +     * it supports more than one thread.
3689 +     */
3690 +    public void testDefaultExecutor() {
3691 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3692 +        Executor e = f.defaultExecutor();
3693 +        Executor c = ForkJoinPool.commonPool();
3694 +        if (ForkJoinPool.getCommonPoolParallelism() > 1)
3695 +            assertSame(e, c);
3696 +        else
3697 +            assertNotSame(e, c);
3698 +    }
3699 +
3700 +    /**
3701 +     * failedFuture returns a CompletableFuture completed
3702 +     * exceptionally with the given Exception
3703 +     */
3704 +    public void testFailedFuture() {
3705 +        CFException ex = new CFException();
3706 +        CompletableFuture<Integer> f = CompletableFuture.failedFuture(ex);
3707 +        checkCompletedExceptionally(f, ex);
3708 +    }
3709 +
3710 +    /**
3711 +     * failedFuture(null) throws NPE
3712 +     */
3713 +    public void testFailedFuture_null() {
3714 +        try {
3715 +            CompletableFuture<Integer> f = CompletableFuture.failedFuture(null);
3716 +            shouldThrow();
3717 +        } catch (NullPointerException success) {}
3718      }
3719 +
3720 +    /**
3721 +     * copy returns a CompletableFuture that is completed normally,
3722 +     * with the same value, when source is.
3723 +     */
3724 +    public void testCopy_normalCompletion() {
3725 +        for (boolean createIncomplete : new boolean[] { true, false })
3726 +        for (Integer v1 : new Integer[] { 1, null })
3727 +    {
3728 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3729 +        if (!createIncomplete) assertTrue(f.complete(v1));
3730 +        CompletableFuture<Integer> g = f.copy();
3731 +        if (createIncomplete) {
3732 +            checkIncomplete(f);
3733 +            checkIncomplete(g);
3734 +            assertTrue(f.complete(v1));
3735 +        }
3736 +        checkCompletedNormally(f, v1);
3737 +        checkCompletedNormally(g, v1);
3738 +    }}
3739 +
3740 +    /**
3741 +     * copy returns a CompletableFuture that is completed exceptionally
3742 +     * when source is.
3743 +     */
3744 +    public void testCopy_exceptionalCompletion() {
3745 +        for (boolean createIncomplete : new boolean[] { true, false })
3746 +    {
3747 +        CFException ex = new CFException();
3748 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3749 +        if (!createIncomplete) f.completeExceptionally(ex);
3750 +        CompletableFuture<Integer> g = f.copy();
3751 +        if (createIncomplete) {
3752 +            checkIncomplete(f);
3753 +            checkIncomplete(g);
3754 +            f.completeExceptionally(ex);
3755 +        }
3756 +        checkCompletedExceptionally(f, ex);
3757 +        checkCompletedWithWrappedException(g, ex);
3758 +    }}
3759 +
3760 +    /**
3761 +     * Completion of a copy does not complete its source.
3762 +     */
3763 +    public void testCopy_oneWayPropagation() {
3764 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3765 +        assertTrue(f.copy().complete(1));
3766 +        assertTrue(f.copy().complete(null));
3767 +        assertTrue(f.copy().cancel(true));
3768 +        assertTrue(f.copy().cancel(false));
3769 +        assertTrue(f.copy().completeExceptionally(new CFException()));
3770 +        checkIncomplete(f);
3771 +    }
3772 +
3773 +    /**
3774 +     * minimalCompletionStage returns a CompletableFuture that is
3775 +     * completed normally, with the same value, when source is.
3776 +     */
3777 +    public void testMinimalCompletionStage() {
3778 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3779 +        CompletionStage<Integer> g = f.minimalCompletionStage();
3780 +        AtomicInteger x = new AtomicInteger(0);
3781 +        AtomicReference<Throwable> r = new AtomicReference<>();
3782 +        checkIncomplete(f);
3783 +        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3784 +        f.complete(1);
3785 +        checkCompletedNormally(f, 1);
3786 +        assertEquals(x.get(), 1);
3787 +        assertNull(r.get());
3788 +    }
3789 +
3790 +    /**
3791 +     * minimalCompletionStage returns a CompletableFuture that is
3792 +     * completed exceptionally when source is.
3793 +     */
3794 +    public void testMinimalCompletionStage2() {
3795 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3796 +        CompletionStage<Integer> g = f.minimalCompletionStage();
3797 +        AtomicInteger x = new AtomicInteger(0);
3798 +        AtomicReference<Throwable> r = new AtomicReference<>();
3799 +        g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3800 +        checkIncomplete(f);
3801 +        CFException ex = new CFException();
3802 +        f.completeExceptionally(ex);
3803 +        checkCompletedExceptionally(f, ex);
3804 +        assertEquals(x.get(), 0);
3805 +        assertEquals(r.get().getCause(), ex);
3806 +    }
3807 +
3808 +    /**
3809 +     * failedStage returns a CompletionStage completed
3810 +     * exceptionally with the given Exception
3811 +     */
3812 +    public void testFailedStage() {
3813 +        CFException ex = new CFException();
3814 +        CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3815 +        AtomicInteger x = new AtomicInteger(0);
3816 +        AtomicReference<Throwable> r = new AtomicReference<>();
3817 +        f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3818 +        assertEquals(x.get(), 0);
3819 +        assertEquals(r.get(), ex);
3820 +    }
3821 +
3822 +    /**
3823 +     * completeAsync completes with value of given supplier
3824 +     */
3825 +    public void testCompleteAsync() {
3826 +        for (Integer v1 : new Integer[] { 1, null })
3827 +    {
3828 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3829 +        f.completeAsync(() -> v1);
3830 +        f.join();
3831 +        checkCompletedNormally(f, v1);
3832 +    }}
3833 +
3834 +    /**
3835 +     * completeAsync completes exceptionally if given supplier throws
3836 +     */
3837 +    public void testCompleteAsync2() {
3838 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3839 +        CFException ex = new CFException();
3840 +        f.completeAsync(() -> { throw ex; });
3841 +        try {
3842 +            f.join();
3843 +            shouldThrow();
3844 +        } catch (CompletionException success) {}
3845 +        checkCompletedWithWrappedException(f, ex);
3846 +    }
3847 +
3848 +    /**
3849 +     * completeAsync with given executor completes with value of given supplier
3850 +     */
3851 +    public void testCompleteAsync3() {
3852 +        for (Integer v1 : new Integer[] { 1, null })
3853 +    {
3854 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3855 +        ThreadExecutor executor = new ThreadExecutor();
3856 +        f.completeAsync(() -> v1, executor);
3857 +        assertSame(v1, f.join());
3858 +        checkCompletedNormally(f, v1);
3859 +        assertEquals(1, executor.count.get());
3860 +    }}
3861 +
3862 +    /**
3863 +     * completeAsync with given executor completes exceptionally if
3864 +     * given supplier throws
3865 +     */
3866 +    public void testCompleteAsync4() {
3867 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3868 +        CFException ex = new CFException();
3869 +        ThreadExecutor executor = new ThreadExecutor();
3870 +        f.completeAsync(() -> { throw ex; }, executor);
3871 +        try {
3872 +            f.join();
3873 +            shouldThrow();
3874 +        } catch (CompletionException success) {}
3875 +        checkCompletedWithWrappedException(f, ex);
3876 +        assertEquals(1, executor.count.get());
3877 +    }
3878 +
3879 +    /**
3880 +     * orTimeout completes with TimeoutException if not complete
3881 +     */
3882 +    public void testOrTimeout_timesOut() {
3883 +        long timeoutMillis = timeoutMillis();
3884 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3885 +        long startTime = System.nanoTime();
3886 +        assertSame(f, f.orTimeout(timeoutMillis, MILLISECONDS));
3887 +        checkCompletedWithTimeoutException(f);
3888 +        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3889 +    }
3890 +
3891 +    /**
3892 +     * orTimeout completes normally if completed before timeout
3893 +     */
3894 +    public void testOrTimeout_completed() {
3895 +        for (Integer v1 : new Integer[] { 1, null })
3896 +    {
3897 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3898 +        CompletableFuture<Integer> g = new CompletableFuture<>();
3899 +        long startTime = System.nanoTime();
3900 +        f.complete(v1);
3901 +        assertSame(f, f.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3902 +        assertSame(g, g.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3903 +        g.complete(v1);
3904 +        checkCompletedNormally(f, v1);
3905 +        checkCompletedNormally(g, v1);
3906 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3907 +    }}
3908 +
3909 +    /**
3910 +     * completeOnTimeout completes with given value if not complete
3911 +     */
3912 +    public void testCompleteOnTimeout_timesOut() {
3913 +        testInParallel(() -> testCompleteOnTimeout_timesOut(42),
3914 +                       () -> testCompleteOnTimeout_timesOut(null));
3915 +    }
3916 +
3917 +    /**
3918 +     * completeOnTimeout completes with given value if not complete
3919 +     */
3920 +    public void testCompleteOnTimeout_timesOut(Integer v) {
3921 +        long timeoutMillis = timeoutMillis();
3922 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3923 +        long startTime = System.nanoTime();
3924 +        assertSame(f, f.completeOnTimeout(v, timeoutMillis, MILLISECONDS));
3925 +        assertSame(v, f.join());
3926 +        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3927 +        f.complete(99);         // should have no effect
3928 +        checkCompletedNormally(f, v);
3929 +    }
3930 +
3931 +    /**
3932 +     * completeOnTimeout has no effect if completed within timeout
3933 +     */
3934 +    public void testCompleteOnTimeout_completed() {
3935 +        for (Integer v1 : new Integer[] { 1, null })
3936 +    {
3937 +        CompletableFuture<Integer> f = new CompletableFuture<>();
3938 +        CompletableFuture<Integer> g = new CompletableFuture<>();
3939 +        long startTime = System.nanoTime();
3940 +        f.complete(v1);
3941 +        assertSame(f, f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3942 +        assertSame(g, g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3943 +        g.complete(v1);
3944 +        checkCompletedNormally(f, v1);
3945 +        checkCompletedNormally(g, v1);
3946 +        assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3947 +    }}
3948 +
3949 +    /**
3950 +     * delayedExecutor returns an executor that delays submission
3951 +     */
3952 +    public void testDelayedExecutor() {
3953 +        testInParallel(() -> testDelayedExecutor(null, null),
3954 +                       () -> testDelayedExecutor(null, 1),
3955 +                       () -> testDelayedExecutor(new ThreadExecutor(), 1),
3956 +                       () -> testDelayedExecutor(new ThreadExecutor(), 1));
3957 +    }
3958 +
3959 +    public void testDelayedExecutor(Executor executor, Integer v) throws Exception {
3960 +        long timeoutMillis = timeoutMillis();
3961 +        // Use an "unreasonably long" long timeout to catch lingering threads
3962 +        long longTimeoutMillis = 1000 * 60 * 60 * 24;
3963 +        final Executor delayer, longDelayer;
3964 +        if (executor == null) {
3965 +            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS);
3966 +            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS);
3967 +        } else {
3968 +            delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS, executor);
3969 +            longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS, executor);
3970 +        }
3971 +        long startTime = System.nanoTime();
3972 +        CompletableFuture<Integer> f =
3973 +            CompletableFuture.supplyAsync(() -> v, delayer);
3974 +        CompletableFuture<Integer> g =
3975 +            CompletableFuture.supplyAsync(() -> v, longDelayer);
3976 +
3977 +        assertNull(g.getNow(null));
3978 +
3979 +        assertSame(v, f.get(LONG_DELAY_MS, MILLISECONDS));
3980 +        long millisElapsed = millisElapsedSince(startTime);
3981 +        assertTrue(millisElapsed >= timeoutMillis);
3982 +        assertTrue(millisElapsed < LONG_DELAY_MS / 2);
3983 +
3984 +        checkCompletedNormally(f, v);
3985 +
3986 +        checkIncomplete(g);
3987 +        assertTrue(g.cancel(true));
3988 +    }
3989 +
3990 +    //--- tests of implementation details; not part of official tck ---
3991 +
3992 +    Object resultOf(CompletableFuture<?> f) {
3993 +        SecurityManager sm = System.getSecurityManager();
3994 +        if (sm != null) {
3995 +            try {
3996 +                System.setSecurityManager(null);
3997 +            } catch (SecurityException giveUp) {
3998 +                return "Reflection not available";
3999 +            }
4000 +        }
4001 +
4002 +        try {
4003 +            java.lang.reflect.Field resultField
4004 +                = CompletableFuture.class.getDeclaredField("result");
4005 +            resultField.setAccessible(true);
4006 +            return resultField.get(f);
4007 +        } catch (Throwable t) {
4008 +            throw new AssertionError(t);
4009 +        } finally {
4010 +            if (sm != null) System.setSecurityManager(sm);
4011 +        }
4012 +    }
4013 +
4014 +    public void testExceptionPropagationReusesResultObject() {
4015 +        if (!testImplementationDetails) return;
4016 +        for (ExecutionMode m : ExecutionMode.values())
4017 +    {
4018 +        final CFException ex = new CFException();
4019 +        final CompletableFuture<Integer> v42 = CompletableFuture.completedFuture(42);
4020 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
4021 +
4022 +        final Runnable noopRunnable = new Noop(m);
4023 +        final Consumer<Integer> noopConsumer = new NoopConsumer(m);
4024 +        final Function<Integer, Integer> incFunction = new IncFunction(m);
4025 +
4026 +        List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> funs
4027 +            = new ArrayList<>();
4028 +
4029 +        funs.add(y -> m.thenRun(y, noopRunnable));
4030 +        funs.add(y -> m.thenAccept(y, noopConsumer));
4031 +        funs.add(y -> m.thenApply(y, incFunction));
4032 +
4033 +        funs.add(y -> m.runAfterEither(y, incomplete, noopRunnable));
4034 +        funs.add(y -> m.acceptEither(y, incomplete, noopConsumer));
4035 +        funs.add(y -> m.applyToEither(y, incomplete, incFunction));
4036 +
4037 +        funs.add(y -> m.runAfterBoth(y, v42, noopRunnable));
4038 +        funs.add(y -> m.runAfterBoth(v42, y, noopRunnable));
4039 +        funs.add(y -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
4040 +        funs.add(y -> m.thenAcceptBoth(v42, y, new SubtractAction(m)));
4041 +        funs.add(y -> m.thenCombine(y, v42, new SubtractFunction(m)));
4042 +        funs.add(y -> m.thenCombine(v42, y, new SubtractFunction(m)));
4043 +
4044 +        funs.add(y -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
4045 +
4046 +        funs.add(y -> m.thenCompose(y, new CompletableFutureInc(m)));
4047 +
4048 +        funs.add(y -> CompletableFuture.allOf(y));
4049 +        funs.add(y -> CompletableFuture.allOf(y, v42));
4050 +        funs.add(y -> CompletableFuture.allOf(v42, y));
4051 +        funs.add(y -> CompletableFuture.anyOf(y));
4052 +        funs.add(y -> CompletableFuture.anyOf(y, incomplete));
4053 +        funs.add(y -> CompletableFuture.anyOf(incomplete, y));
4054 +
4055 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
4056 +                 fun : funs) {
4057 +            CompletableFuture<Integer> f = new CompletableFuture<>();
4058 +            f.completeExceptionally(ex);
4059 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
4060 +            checkCompletedWithWrappedException(src, ex);
4061 +            CompletableFuture<?> dep = fun.apply(src);
4062 +            checkCompletedWithWrappedException(dep, ex);
4063 +            assertSame(resultOf(src), resultOf(dep));
4064 +        }
4065 +
4066 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
4067 +                 fun : funs) {
4068 +            CompletableFuture<Integer> f = new CompletableFuture<>();
4069 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
4070 +            CompletableFuture<?> dep = fun.apply(src);
4071 +            f.completeExceptionally(ex);
4072 +            checkCompletedWithWrappedException(src, ex);
4073 +            checkCompletedWithWrappedException(dep, ex);
4074 +            assertSame(resultOf(src), resultOf(dep));
4075 +        }
4076 +
4077 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
4078 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
4079 +                 fun : funs) {
4080 +            CompletableFuture<Integer> f = new CompletableFuture<>();
4081 +            f.cancel(mayInterruptIfRunning);
4082 +            checkCancelled(f);
4083 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
4084 +            checkCompletedWithWrappedCancellationException(src);
4085 +            CompletableFuture<?> dep = fun.apply(src);
4086 +            checkCompletedWithWrappedCancellationException(dep);
4087 +            assertSame(resultOf(src), resultOf(dep));
4088 +        }
4089 +
4090 +        for (boolean mayInterruptIfRunning : new boolean[] { true, false })
4091 +        for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
4092 +                 fun : funs) {
4093 +            CompletableFuture<Integer> f = new CompletableFuture<>();
4094 +            CompletableFuture<Integer> src = m.thenApply(f, incFunction);
4095 +            CompletableFuture<?> dep = fun.apply(src);
4096 +            f.cancel(mayInterruptIfRunning);
4097 +            checkCancelled(f);
4098 +            checkCompletedWithWrappedCancellationException(src);
4099 +            checkCompletedWithWrappedCancellationException(dep);
4100 +            assertSame(resultOf(src), resultOf(dep));
4101 +        }
4102 +    }}
4103 +
4104 +    /**
4105 +     * Minimal completion stages throw UOE for most non-CompletionStage methods
4106 +     */
4107 +    public void testMinimalCompletionStage_minimality() {
4108 +        if (!testImplementationDetails) return;
4109 +        Function<Method, String> toSignature =
4110 +            method -> method.getName() + Arrays.toString(method.getParameterTypes());
4111 +        Predicate<Method> isNotStatic =
4112 +            method -> (method.getModifiers() & Modifier.STATIC) == 0;
4113 +        List<Method> minimalMethods =
4114 +            Stream.of(Object.class, CompletionStage.class)
4115 +            .flatMap(klazz -> Stream.of(klazz.getMethods()))
4116 +            .filter(isNotStatic)
4117 +            .collect(Collectors.toList());
4118 +        // Methods from CompletableFuture permitted NOT to throw UOE
4119 +        String[] signatureWhitelist = {
4120 +            "newIncompleteFuture[]",
4121 +            "defaultExecutor[]",
4122 +            "minimalCompletionStage[]",
4123 +            "copy[]",
4124 +        };
4125 +        Set<String> permittedMethodSignatures =
4126 +            Stream.concat(minimalMethods.stream().map(toSignature),
4127 +                          Stream.of(signatureWhitelist))
4128 +            .collect(Collectors.toSet());
4129 +        List<Method> allMethods = Stream.of(CompletableFuture.class.getMethods())
4130 +            .filter(isNotStatic)
4131 +            .filter(method -> !permittedMethodSignatures.contains(toSignature.apply(method)))
4132 +            .collect(Collectors.toList());
4133 +
4134 +        List<CompletionStage<Integer>> stages = new ArrayList<>();
4135 +        CompletionStage<Integer> min =
4136 +            new CompletableFuture<Integer>().minimalCompletionStage();
4137 +        stages.add(min);
4138 +        stages.add(min.thenApply(x -> x));
4139 +        stages.add(CompletableFuture.completedStage(1));
4140 +        stages.add(CompletableFuture.failedStage(new CFException()));
4141 +
4142 +        List<Method> bugs = new ArrayList<>();
4143 +        for (Method method : allMethods) {
4144 +            Class<?>[] parameterTypes = method.getParameterTypes();
4145 +            Object[] args = new Object[parameterTypes.length];
4146 +            // Manufacture boxed primitives for primitive params
4147 +            for (int i = 0; i < args.length; i++) {
4148 +                Class<?> type = parameterTypes[i];
4149 +                if (parameterTypes[i] == boolean.class)
4150 +                    args[i] = false;
4151 +                else if (parameterTypes[i] == int.class)
4152 +                    args[i] = 0;
4153 +                else if (parameterTypes[i] == long.class)
4154 +                    args[i] = 0L;
4155 +            }
4156 +            for (CompletionStage<Integer> stage : stages) {
4157 +                try {
4158 +                    method.invoke(stage, args);
4159 +                    bugs.add(method);
4160 +                }
4161 +                catch (java.lang.reflect.InvocationTargetException expected) {
4162 +                    if (! (expected.getCause() instanceof UnsupportedOperationException)) {
4163 +                        bugs.add(method);
4164 +                        // expected.getCause().printStackTrace();
4165 +                    }
4166 +                }
4167 +                catch (ReflectiveOperationException bad) { throw new Error(bad); }
4168 +            }
4169 +        }
4170 +        if (!bugs.isEmpty())
4171 +            throw new Error("Methods did not throw UOE: " + bugs);
4172 +    }
4173 +
4174 +    /**
4175 +     * minimalStage.toCompletableFuture() returns a CompletableFuture that
4176 +     * is completed normally, with the same value, when source is.
4177 +     */
4178 +    public void testMinimalCompletionStage_toCompletableFuture_normalCompletion() {
4179 +        for (boolean createIncomplete : new boolean[] { true, false })
4180 +        for (Integer v1 : new Integer[] { 1, null })
4181 +    {
4182 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4183 +        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4184 +        if (!createIncomplete) assertTrue(f.complete(v1));
4185 +        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4186 +        if (createIncomplete) {
4187 +            checkIncomplete(f);
4188 +            checkIncomplete(g);
4189 +            assertTrue(f.complete(v1));
4190 +        }
4191 +        checkCompletedNormally(f, v1);
4192 +        checkCompletedNormally(g, v1);
4193 +    }}
4194 +
4195 +    /**
4196 +     * minimalStage.toCompletableFuture() returns a CompletableFuture that
4197 +     * is completed exceptionally when source is.
4198 +     */
4199 +    public void testMinimalCompletionStage_toCompletableFuture_exceptionalCompletion() {
4200 +        for (boolean createIncomplete : new boolean[] { true, false })
4201 +    {
4202 +        CFException ex = new CFException();
4203 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4204 +        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4205 +        if (!createIncomplete) f.completeExceptionally(ex);
4206 +        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4207 +        if (createIncomplete) {
4208 +            checkIncomplete(f);
4209 +            checkIncomplete(g);
4210 +            f.completeExceptionally(ex);
4211 +        }
4212 +        checkCompletedExceptionally(f, ex);
4213 +        checkCompletedWithWrappedException(g, ex);
4214 +    }}
4215 +
4216 +    /**
4217 +     * minimalStage.toCompletableFuture() gives mutable CompletableFuture
4218 +     */
4219 +    public void testMinimalCompletionStage_toCompletableFuture_mutable() {
4220 +        for (Integer v1 : new Integer[] { 1, null })
4221 +    {
4222 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4223 +        CompletionStage minimal = f.minimalCompletionStage();
4224 +        CompletableFuture<Integer> g = minimal.toCompletableFuture();
4225 +        assertTrue(g.complete(v1));
4226 +        checkCompletedNormally(g, v1);
4227 +        checkIncomplete(f);
4228 +        checkIncomplete(minimal.toCompletableFuture());
4229 +    }}
4230 +
4231 +    /**
4232 +     * minimalStage.toCompletableFuture().join() awaits completion
4233 +     */
4234 +    public void testMinimalCompletionStage_toCompletableFuture_join() throws Exception {
4235 +        for (boolean createIncomplete : new boolean[] { true, false })
4236 +        for (Integer v1 : new Integer[] { 1, null })
4237 +    {
4238 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4239 +        if (!createIncomplete) assertTrue(f.complete(v1));
4240 +        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4241 +        if (createIncomplete) assertTrue(f.complete(v1));
4242 +        assertEquals(v1, minimal.toCompletableFuture().join());
4243 +        assertEquals(v1, minimal.toCompletableFuture().get());
4244 +        checkCompletedNormally(minimal.toCompletableFuture(), v1);
4245 +    }}
4246 +
4247 +    /**
4248 +     * Completion of a toCompletableFuture copy of a minimal stage
4249 +     * does not complete its source.
4250 +     */
4251 +    public void testMinimalCompletionStage_toCompletableFuture_oneWayPropagation() {
4252 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4253 +        CompletionStage<Integer> g = f.minimalCompletionStage();
4254 +        assertTrue(g.toCompletableFuture().complete(1));
4255 +        assertTrue(g.toCompletableFuture().complete(null));
4256 +        assertTrue(g.toCompletableFuture().cancel(true));
4257 +        assertTrue(g.toCompletableFuture().cancel(false));
4258 +        assertTrue(g.toCompletableFuture().completeExceptionally(new CFException()));
4259 +        checkIncomplete(g.toCompletableFuture());
4260 +        f.complete(1);
4261 +        checkCompletedNormally(g.toCompletableFuture(), 1);
4262 +    }
4263 +
4264 +    /** Demo utility method for external reliable toCompletableFuture */
4265 +    static <T> CompletableFuture<T> toCompletableFuture(CompletionStage<T> stage) {
4266 +        CompletableFuture<T> f = new CompletableFuture<>();
4267 +        stage.handle((T t, Throwable ex) -> {
4268 +                         if (ex != null) f.completeExceptionally(ex);
4269 +                         else f.complete(t);
4270 +                         return null;
4271 +                     });
4272 +        return f;
4273 +    }
4274 +
4275 +    /** Demo utility method to join a CompletionStage */
4276 +    static <T> T join(CompletionStage<T> stage) {
4277 +        return toCompletableFuture(stage).join();
4278 +    }
4279 +
4280 +    /**
4281 +     * Joining a minimal stage "by hand" works
4282 +     */
4283 +    public void testMinimalCompletionStage_join_by_hand() {
4284 +        for (boolean createIncomplete : new boolean[] { true, false })
4285 +        for (Integer v1 : new Integer[] { 1, null })
4286 +    {
4287 +        CompletableFuture<Integer> f = new CompletableFuture<>();
4288 +        CompletionStage<Integer> minimal = f.minimalCompletionStage();
4289 +        CompletableFuture<Integer> g = new CompletableFuture<>();
4290 +        if (!createIncomplete) assertTrue(f.complete(v1));
4291 +        minimal.thenAccept(x -> g.complete(x));
4292 +        if (createIncomplete) assertTrue(f.complete(v1));
4293 +        g.join();
4294 +        checkCompletedNormally(g, v1);
4295 +        checkCompletedNormally(f, v1);
4296 +        assertEquals(v1, join(minimal));
4297 +    }}
4298 +
4299 +    static class Monad {
4300 +        static class ZeroException extends RuntimeException {
4301 +            public ZeroException() { super("monadic zero"); }
4302 +        }
4303 +        // "return", "unit"
4304 +        static <T> CompletableFuture<T> unit(T value) {
4305 +            return completedFuture(value);
4306 +        }
4307 +        // monadic zero ?
4308 +        static <T> CompletableFuture<T> zero() {
4309 +            return failedFuture(new ZeroException());
4310 +        }
4311 +        // >=>
4312 +        static <T,U,V> Function<T, CompletableFuture<V>> compose
4313 +            (Function<T, CompletableFuture<U>> f,
4314 +             Function<U, CompletableFuture<V>> g) {
4315 +            return x -> f.apply(x).thenCompose(g);
4316 +        }
4317 +
4318 +        static void assertZero(CompletableFuture<?> f) {
4319 +            try {
4320 +                f.getNow(null);
4321 +                throw new AssertionError("should throw");
4322 +            } catch (CompletionException success) {
4323 +                assertTrue(success.getCause() instanceof ZeroException);
4324 +            }
4325 +        }
4326 +
4327 +        static <T> void assertFutureEquals(CompletableFuture<T> f,
4328 +                                           CompletableFuture<T> g) {
4329 +            T fval = null, gval = null;
4330 +            Throwable fex = null, gex = null;
4331 +
4332 +            try { fval = f.get(); }
4333 +            catch (ExecutionException ex) { fex = ex.getCause(); }
4334 +            catch (Throwable ex) { fex = ex; }
4335 +
4336 +            try { gval = g.get(); }
4337 +            catch (ExecutionException ex) { gex = ex.getCause(); }
4338 +            catch (Throwable ex) { gex = ex; }
4339 +
4340 +            if (fex != null || gex != null)
4341 +                assertSame(fex.getClass(), gex.getClass());
4342 +            else
4343 +                assertEquals(fval, gval);
4344 +        }
4345 +
4346 +        static class PlusFuture<T> extends CompletableFuture<T> {
4347 +            AtomicReference<Throwable> firstFailure = new AtomicReference<>(null);
4348 +        }
4349 +
4350 +        /** Implements "monadic plus". */
4351 +        static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f,
4352 +                                             CompletableFuture<? extends T> g) {
4353 +            PlusFuture<T> plus = new PlusFuture<T>();
4354 +            BiConsumer<T, Throwable> action = (T result, Throwable ex) -> {
4355 +                try {
4356 +                    if (ex == null) {
4357 +                        if (plus.complete(result))
4358 +                            if (plus.firstFailure.get() != null)
4359 +                                plus.firstFailure.set(null);
4360 +                    }
4361 +                    else if (plus.firstFailure.compareAndSet(null, ex)) {
4362 +                        if (plus.isDone())
4363 +                            plus.firstFailure.set(null);
4364 +                    }
4365 +                    else {
4366 +                        // first failure has precedence
4367 +                        Throwable first = plus.firstFailure.getAndSet(null);
4368 +
4369 +                        // may fail with "Self-suppression not permitted"
4370 +                        try { first.addSuppressed(ex); }
4371 +                        catch (Exception ignored) {}
4372 +
4373 +                        plus.completeExceptionally(first);
4374 +                    }
4375 +                } catch (Throwable unexpected) {
4376 +                    plus.completeExceptionally(unexpected);
4377 +                }
4378 +            };
4379 +            f.whenComplete(action);
4380 +            g.whenComplete(action);
4381 +            return plus;
4382 +        }
4383 +    }
4384 +
4385 +    /**
4386 +     * CompletableFuture is an additive monad - sort of.
4387 +     * https://en.wikipedia.org/wiki/Monad_(functional_programming)#Additive_monads
4388 +     */
4389 +    public void testAdditiveMonad() throws Throwable {
4390 +        Function<Long, CompletableFuture<Long>> unit = Monad::unit;
4391 +        CompletableFuture<Long> zero = Monad.zero();
4392 +
4393 +        // Some mutually non-commutative functions
4394 +        Function<Long, CompletableFuture<Long>> triple
4395 +            = x -> Monad.unit(3 * x);
4396 +        Function<Long, CompletableFuture<Long>> inc
4397 +            = x -> Monad.unit(x + 1);
4398 +
4399 +        // unit is a right identity: m >>= unit === m
4400 +        Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
4401 +                                 inc.apply(5L));
4402 +        // unit is a left identity: (unit x) >>= f === f x
4403 +        Monad.assertFutureEquals(unit.apply(5L).thenCompose(inc),
4404 +                                 inc.apply(5L));
4405 +
4406 +        // associativity: (m >>= f) >>= g === m >>= ( \x -> (f x >>= g) )
4407 +        Monad.assertFutureEquals(
4408 +            unit.apply(5L).thenCompose(inc).thenCompose(triple),
4409 +            unit.apply(5L).thenCompose(x -> inc.apply(x).thenCompose(triple)));
4410 +
4411 +        // The case for CompletableFuture as an additive monad is weaker...
4412 +
4413 +        // zero is a monadic zero
4414 +        Monad.assertZero(zero);
4415 +
4416 +        // left zero: zero >>= f === zero
4417 +        Monad.assertZero(zero.thenCompose(inc));
4418 +        // right zero: f >>= (\x -> zero) === zero
4419 +        Monad.assertZero(inc.apply(5L).thenCompose(x -> zero));
4420 +
4421 +        // f plus zero === f
4422 +        Monad.assertFutureEquals(Monad.unit(5L),
4423 +                                 Monad.plus(Monad.unit(5L), zero));
4424 +        // zero plus f === f
4425 +        Monad.assertFutureEquals(Monad.unit(5L),
4426 +                                 Monad.plus(zero, Monad.unit(5L)));
4427 +        // zero plus zero === zero
4428 +        Monad.assertZero(Monad.plus(zero, zero));
4429 +        {
4430 +            CompletableFuture<Long> f = Monad.plus(Monad.unit(5L),
4431 +                                                   Monad.unit(8L));
4432 +            // non-determinism
4433 +            assertTrue(f.get() == 5L || f.get() == 8L);
4434 +        }
4435 +
4436 +        CompletableFuture<Long> godot = new CompletableFuture<>();
4437 +        // f plus godot === f (doesn't wait for godot)
4438 +        Monad.assertFutureEquals(Monad.unit(5L),
4439 +                                 Monad.plus(Monad.unit(5L), godot));
4440 +        // godot plus f === f (doesn't wait for godot)
4441 +        Monad.assertFutureEquals(Monad.unit(5L),
4442 +                                 Monad.plus(godot, Monad.unit(5L)));
4443 +    }
4444 +
4445 +    /** Test long recursive chains of CompletableFutures with cascading completions */
4446 +    @SuppressWarnings("FutureReturnValueIgnored")
4447 +    public void testRecursiveChains() throws Throwable {
4448 +        for (ExecutionMode m : ExecutionMode.values())
4449 +        for (boolean addDeadEnds : new boolean[] { true, false })
4450 +    {
4451 +        final int val = 42;
4452 +        final int n = expensiveTests ? 1_000 : 2;
4453 +        CompletableFuture<Integer> head = new CompletableFuture<>();
4454 +        CompletableFuture<Integer> tail = head;
4455 +        for (int i = 0; i < n; i++) {
4456 +            if (addDeadEnds) m.thenApply(tail, v -> v + 1);
4457 +            tail = m.thenApply(tail, v -> v + 1);
4458 +            if (addDeadEnds) m.applyToEither(tail, tail, v -> v + 1);
4459 +            tail = m.applyToEither(tail, tail, v -> v + 1);
4460 +            if (addDeadEnds) m.thenCombine(tail, tail, (v, w) -> v + 1);
4461 +            tail = m.thenCombine(tail, tail, (v, w) -> v + 1);
4462 +        }
4463 +        head.complete(val);
4464 +        assertEquals(val + 3 * n, (int) tail.join());
4465 +    }}
4466 +
4467 +    /**
4468 +     * A single CompletableFuture with many dependents.
4469 +     * A demo of scalability - runtime is O(n).
4470 +     */
4471 +    @SuppressWarnings("FutureReturnValueIgnored")
4472 +    public void testManyDependents() throws Throwable {
4473 +        final int n = expensiveTests ? 1_000_000 : 10;
4474 +        final CompletableFuture<Void> head = new CompletableFuture<>();
4475 +        final CompletableFuture<Void> complete = CompletableFuture.completedFuture((Void)null);
4476 +        final AtomicInteger count = new AtomicInteger(0);
4477 +        for (int i = 0; i < n; i++) {
4478 +            head.thenRun(() -> count.getAndIncrement());
4479 +            head.thenAccept(x -> count.getAndIncrement());
4480 +            head.thenApply(x -> count.getAndIncrement());
4481 +
4482 +            head.runAfterBoth(complete, () -> count.getAndIncrement());
4483 +            head.thenAcceptBoth(complete, (x, y) -> count.getAndIncrement());
4484 +            head.thenCombine(complete, (x, y) -> count.getAndIncrement());
4485 +            complete.runAfterBoth(head, () -> count.getAndIncrement());
4486 +            complete.thenAcceptBoth(head, (x, y) -> count.getAndIncrement());
4487 +            complete.thenCombine(head, (x, y) -> count.getAndIncrement());
4488 +
4489 +            head.runAfterEither(new CompletableFuture<Void>(), () -> count.getAndIncrement());
4490 +            head.acceptEither(new CompletableFuture<Void>(), x -> count.getAndIncrement());
4491 +            head.applyToEither(new CompletableFuture<Void>(), x -> count.getAndIncrement());
4492 +            new CompletableFuture<Void>().runAfterEither(head, () -> count.getAndIncrement());
4493 +            new CompletableFuture<Void>().acceptEither(head, x -> count.getAndIncrement());
4494 +            new CompletableFuture<Void>().applyToEither(head, x -> count.getAndIncrement());
4495 +        }
4496 +        head.complete(null);
4497 +        assertEquals(5 * 3 * n, count.get());
4498 +    }
4499 +
4500 +    /** ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest tck */
4501 +    @SuppressWarnings("FutureReturnValueIgnored")
4502 +    public void testCoCompletionGarbageRetention() throws Throwable {
4503 +        final int n = expensiveTests ? 1_000_000 : 10;
4504 +        final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
4505 +        CompletableFuture<Integer> f;
4506 +        for (int i = 0; i < n; i++) {
4507 +            f = new CompletableFuture<>();
4508 +            f.runAfterEither(incomplete, () -> {});
4509 +            f.complete(null);
4510 +
4511 +            f = new CompletableFuture<>();
4512 +            f.acceptEither(incomplete, x -> {});
4513 +            f.complete(null);
4514 +
4515 +            f = new CompletableFuture<>();
4516 +            f.applyToEither(incomplete, x -> x);
4517 +            f.complete(null);
4518 +
4519 +            f = new CompletableFuture<>();
4520 +            CompletableFuture.anyOf(f, incomplete);
4521 +            f.complete(null);
4522 +        }
4523 +
4524 +        for (int i = 0; i < n; i++) {
4525 +            f = new CompletableFuture<>();
4526 +            incomplete.runAfterEither(f, () -> {});
4527 +            f.complete(null);
4528 +
4529 +            f = new CompletableFuture<>();
4530 +            incomplete.acceptEither(f, x -> {});
4531 +            f.complete(null);
4532 +
4533 +            f = new CompletableFuture<>();
4534 +            incomplete.applyToEither(f, x -> x);
4535 +            f.complete(null);
4536 +
4537 +            f = new CompletableFuture<>();
4538 +            CompletableFuture.anyOf(incomplete, f);
4539 +            f.complete(null);
4540 +        }
4541 +    }
4542 +
4543 +    /**
4544 +     * Reproduction recipe for:
4545 +     * 8160402: Garbage retention with CompletableFuture.anyOf
4546 +     * 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
4547 +     */
4548 +    public void testAnyOfGarbageRetention() throws Throwable {
4549 +        for (Integer v : new Integer[] { 1, null })
4550 +    {
4551 +        final int n = expensiveTests ? 100_000 : 10;
4552 +        CompletableFuture<Integer>[] fs
4553 +            = (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4554 +        for (int i = 0; i < fs.length; i++)
4555 +            fs[i] = new CompletableFuture<>();
4556 +        fs[fs.length - 1].complete(v);
4557 +        for (int i = 0; i < n; i++)
4558 +            checkCompletedNormally(CompletableFuture.anyOf(fs), v);
4559 +    }}
4560 +
4561 +    /**
4562 +     * Checks for garbage retention with allOf.
4563 +     *
4564 +     * As of 2016-07, fails with OOME:
4565 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledAllOfGarbageRetention tck
4566 +     */
4567 +    public void testCancelledAllOfGarbageRetention() throws Throwable {
4568 +        final int n = expensiveTests ? 100_000 : 10;
4569 +        CompletableFuture<Integer>[] fs
4570 +            = (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4571 +        for (int i = 0; i < fs.length; i++)
4572 +            fs[i] = new CompletableFuture<>();
4573 +        for (int i = 0; i < n; i++)
4574 +            assertTrue(CompletableFuture.allOf(fs).cancel(false));
4575 +    }
4576 +
4577 +    /**
4578 +     * Checks for garbage retention when a dependent future is
4579 +     * cancelled and garbage-collected.
4580 +     * 8161600: Garbage retention when source CompletableFutures are never completed
4581 +     *
4582 +     * As of 2016-07, fails with OOME:
4583 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledGarbageRetention tck
4584 +     */
4585 +    public void testCancelledGarbageRetention() throws Throwable {
4586 +        final int n = expensiveTests ? 100_000 : 10;
4587 +        CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4588 +        for (int i = 0; i < n; i++)
4589 +            assertTrue(neverCompleted.thenRun(() -> {}).cancel(true));
4590 +    }
4591 +
4592 +    /**
4593 +     * Checks for garbage retention when MinimalStage.toCompletableFuture()
4594 +     * is invoked many times.
4595 +     * 8161600: Garbage retention when source CompletableFutures are never completed
4596 +     *
4597 +     * As of 2016-07, fails with OOME:
4598 +     * ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testToCompletableFutureGarbageRetention tck
4599 +     */
4600 +    public void testToCompletableFutureGarbageRetention() throws Throwable {
4601 +        final int n = expensiveTests ? 900_000 : 10;
4602 +        CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4603 +        CompletionStage minimal = neverCompleted.minimalCompletionStage();
4604 +        for (int i = 0; i < n; i++)
4605 +            assertTrue(minimal.toCompletableFuture().cancel(true));
4606 +    }
4607 +
4608 + //     static <U> U join(CompletionStage<U> stage) {
4609 + //         CompletableFuture<U> f = new CompletableFuture<>();
4610 + //         stage.whenComplete((v, ex) -> {
4611 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4612 + //         });
4613 + //         return f.join();
4614 + //     }
4615 +
4616 + //     static <U> boolean isDone(CompletionStage<U> stage) {
4617 + //         CompletableFuture<U> f = new CompletableFuture<>();
4618 + //         stage.whenComplete((v, ex) -> {
4619 + //             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4620 + //         });
4621 + //         return f.isDone();
4622 + //     }
4623 +
4624 + //     static <U> U join2(CompletionStage<U> stage) {
4625 + //         return stage.toCompletableFuture().copy().join();
4626 + //     }
4627 +
4628 + //     static <U> boolean isDone2(CompletionStage<U> stage) {
4629 + //         return stage.toCompletableFuture().copy().isDone();
4630 + //     }
4631 +
4632 +    // For testing default implementations
4633 +    // Only non-default interface methods defined.
4634 +    static final class DelegatedCompletionStage<T> implements CompletionStage<T> {
4635 +        final CompletableFuture<T> cf;
4636 +        DelegatedCompletionStage(CompletableFuture<T> cf) { this.cf = cf; }
4637 +        public CompletableFuture<T> toCompletableFuture() {
4638 +            return cf; }
4639 +        public CompletionStage<Void> thenRun
4640 +            (Runnable action) {
4641 +            return cf.thenRun(action); }
4642 +        public CompletionStage<Void> thenRunAsync
4643 +            (Runnable action) {
4644 +            return cf.thenRunAsync(action); }
4645 +        public CompletionStage<Void> thenRunAsync
4646 +            (Runnable action,
4647 +             Executor executor) {
4648 +            return cf.thenRunAsync(action, executor); }
4649 +        public CompletionStage<Void> thenAccept
4650 +            (Consumer<? super T> action) {
4651 +            return cf.thenAccept(action); }
4652 +        public CompletionStage<Void> thenAcceptAsync
4653 +            (Consumer<? super T> action) {
4654 +            return cf.thenAcceptAsync(action); }
4655 +        public CompletionStage<Void> thenAcceptAsync
4656 +            (Consumer<? super T> action,
4657 +             Executor executor) {
4658 +            return cf.thenAcceptAsync(action, executor); }
4659 +        public <U> CompletionStage<U> thenApply
4660 +            (Function<? super T,? extends U> a) {
4661 +            return cf.thenApply(a); }
4662 +        public <U> CompletionStage<U> thenApplyAsync
4663 +            (Function<? super T,? extends U> fn) {
4664 +            return cf.thenApplyAsync(fn); }
4665 +        public <U> CompletionStage<U> thenApplyAsync
4666 +            (Function<? super T,? extends U> fn,
4667 +             Executor executor) {
4668 +            return cf.thenApplyAsync(fn, executor); }
4669 +        public <U,V> CompletionStage<V> thenCombine
4670 +            (CompletionStage<? extends U> other,
4671 +             BiFunction<? super T,? super U,? extends V> fn) {
4672 +            return cf.thenCombine(other, fn); }
4673 +        public <U,V> CompletionStage<V> thenCombineAsync
4674 +            (CompletionStage<? extends U> other,
4675 +             BiFunction<? super T,? super U,? extends V> fn) {
4676 +            return cf.thenCombineAsync(other, fn); }
4677 +        public <U,V> CompletionStage<V> thenCombineAsync
4678 +            (CompletionStage<? extends U> other,
4679 +             BiFunction<? super T,? super U,? extends V> fn,
4680 +             Executor executor) {
4681 +            return cf.thenCombineAsync(other, fn, executor); }
4682 +        public <U> CompletionStage<Void> thenAcceptBoth
4683 +            (CompletionStage<? extends U> other,
4684 +             BiConsumer<? super T, ? super U> action) {
4685 +            return cf.thenAcceptBoth(other, action); }
4686 +        public <U> CompletionStage<Void> thenAcceptBothAsync
4687 +            (CompletionStage<? extends U> other,
4688 +             BiConsumer<? super T, ? super U> action) {
4689 +            return cf.thenAcceptBothAsync(other, action); }
4690 +        public <U> CompletionStage<Void> thenAcceptBothAsync
4691 +            (CompletionStage<? extends U> other,
4692 +             BiConsumer<? super T, ? super U> action,
4693 +             Executor executor) {
4694 +            return cf.thenAcceptBothAsync(other, action, executor); }
4695 +        public CompletionStage<Void> runAfterBoth
4696 +            (CompletionStage<?> other,
4697 +             Runnable action) {
4698 +            return cf.runAfterBoth(other, action); }
4699 +        public CompletionStage<Void> runAfterBothAsync
4700 +            (CompletionStage<?> other,
4701 +             Runnable action) {
4702 +            return cf.runAfterBothAsync(other, action); }
4703 +        public CompletionStage<Void> runAfterBothAsync
4704 +            (CompletionStage<?> other,
4705 +             Runnable action,
4706 +             Executor executor) {
4707 +            return cf.runAfterBothAsync(other, action, executor); }
4708 +        public <U> CompletionStage<U> applyToEither
4709 +            (CompletionStage<? extends T> other,
4710 +             Function<? super T, U> fn) {
4711 +            return cf.applyToEither(other, fn); }
4712 +        public <U> CompletionStage<U> applyToEitherAsync
4713 +            (CompletionStage<? extends T> other,
4714 +             Function<? super T, U> fn) {
4715 +            return cf.applyToEitherAsync(other, fn); }
4716 +        public <U> CompletionStage<U> applyToEitherAsync
4717 +            (CompletionStage<? extends T> other,
4718 +             Function<? super T, U> fn,
4719 +             Executor executor) {
4720 +            return cf.applyToEitherAsync(other, fn, executor); }
4721 +        public CompletionStage<Void> acceptEither
4722 +            (CompletionStage<? extends T> other,
4723 +             Consumer<? super T> action) {
4724 +            return cf.acceptEither(other, action); }
4725 +        public CompletionStage<Void> acceptEitherAsync
4726 +            (CompletionStage<? extends T> other,
4727 +             Consumer<? super T> action) {
4728 +            return cf.acceptEitherAsync(other, action); }
4729 +        public CompletionStage<Void> acceptEitherAsync
4730 +            (CompletionStage<? extends T> other,
4731 +             Consumer<? super T> action,
4732 +             Executor executor) {
4733 +            return cf.acceptEitherAsync(other, action, executor); }
4734 +        public CompletionStage<Void> runAfterEither
4735 +            (CompletionStage<?> other,
4736 +             Runnable action) {
4737 +            return cf.runAfterEither(other, action); }
4738 +        public CompletionStage<Void> runAfterEitherAsync
4739 +            (CompletionStage<?> other,
4740 +             Runnable action) {
4741 +            return cf.runAfterEitherAsync(other, action); }
4742 +        public CompletionStage<Void> runAfterEitherAsync
4743 +            (CompletionStage<?> other,
4744 +             Runnable action,
4745 +             Executor executor) {
4746 +            return cf.runAfterEitherAsync(other, action, executor); }
4747 +        public <U> CompletionStage<U> thenCompose
4748 +            (Function<? super T, ? extends CompletionStage<U>> fn) {
4749 +            return cf.thenCompose(fn); }
4750 +        public <U> CompletionStage<U> thenComposeAsync
4751 +            (Function<? super T, ? extends CompletionStage<U>> fn) {
4752 +            return cf.thenComposeAsync(fn); }
4753 +        public <U> CompletionStage<U> thenComposeAsync
4754 +            (Function<? super T, ? extends CompletionStage<U>> fn,
4755 +             Executor executor) {
4756 +            return cf.thenComposeAsync(fn, executor); }
4757 +        public <U> CompletionStage<U> handle
4758 +            (BiFunction<? super T, Throwable, ? extends U> fn) {
4759 +            return cf.handle(fn); }
4760 +        public <U> CompletionStage<U> handleAsync
4761 +            (BiFunction<? super T, Throwable, ? extends U> fn) {
4762 +            return cf.handleAsync(fn); }
4763 +        public <U> CompletionStage<U> handleAsync
4764 +            (BiFunction<? super T, Throwable, ? extends U> fn,
4765 +             Executor executor) {
4766 +            return cf.handleAsync(fn, executor); }
4767 +        public CompletionStage<T> whenComplete
4768 +            (BiConsumer<? super T, ? super Throwable> action) {
4769 +            return cf.whenComplete(action); }
4770 +        public CompletionStage<T> whenCompleteAsync
4771 +            (BiConsumer<? super T, ? super Throwable> action) {
4772 +            return cf.whenCompleteAsync(action); }
4773 +        public CompletionStage<T> whenCompleteAsync
4774 +            (BiConsumer<? super T, ? super Throwable> action,
4775 +             Executor executor) {
4776 +            return cf.whenCompleteAsync(action, executor); }
4777 +        public CompletionStage<T> exceptionally
4778 +            (Function<Throwable, ? extends T> fn) {
4779 +            return cf.exceptionally(fn); }
4780 +    }
4781 +
4782 +    /**
4783 +     * default-implemented exceptionallyAsync action completes with
4784 +     * function value on source exception
4785 +     */
4786 +    public void testDefaultExceptionallyAsync_exceptionalCompletion() {
4787 +        for (boolean createIncomplete : new boolean[] { true, false })
4788 +        for (Integer v1 : new Integer[] { 1, null })
4789 +    {
4790 +        final AtomicInteger a = new AtomicInteger(0);
4791 +        final CFException ex = new CFException();
4792 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4793 +        final DelegatedCompletionStage<Integer> d =
4794 +            new DelegatedCompletionStage<Integer>(f);
4795 +        if (!createIncomplete) f.completeExceptionally(ex);
4796 +        final CompletionStage<Integer> g = d.exceptionallyAsync
4797 +            ((Throwable t) -> {
4798 +                threadAssertSame(t, ex);
4799 +                a.getAndIncrement();
4800 +                return v1;
4801 +            });
4802 +        if (createIncomplete) f.completeExceptionally(ex);
4803 +
4804 +        checkCompletedNormally(g.toCompletableFuture(), v1);
4805 +        assertEquals(1, a.get());
4806 +    }}
4807 +
4808 +    /**
4809 +     * Under default implementation, if an "exceptionally action"
4810 +     * throws an exception, it completes exceptionally with that
4811 +     * exception
4812 +     */
4813 +    public void testDefaultExceptionallyAsync_exceptionalCompletionActionFailed() {
4814 +        for (boolean createIncomplete : new boolean[] { true, false })
4815 +    {
4816 +        final AtomicInteger a = new AtomicInteger(0);
4817 +        final CFException ex1 = new CFException();
4818 +        final CFException ex2 = new CFException();
4819 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4820 +        final DelegatedCompletionStage<Integer> d =
4821 +            new DelegatedCompletionStage<Integer>(f);
4822 +        if (!createIncomplete) f.completeExceptionally(ex1);
4823 +        final CompletionStage<Integer> g = d.exceptionallyAsync
4824 +            ((Throwable t) -> {
4825 +                threadAssertSame(t, ex1);
4826 +                a.getAndIncrement();
4827 +                throw ex2;
4828 +            });
4829 +        if (createIncomplete) f.completeExceptionally(ex1);
4830 +
4831 +        checkCompletedWithWrappedException(g.toCompletableFuture(), ex2);
4832 +        checkCompletedExceptionally(f, ex1);
4833 +        checkCompletedExceptionally(d.toCompletableFuture(), ex1);
4834 +        assertEquals(1, a.get());
4835 +    }}
4836 +
4837 +    /**
4838 +     * default exceptionallyCompose result completes normally after normal
4839 +     * completion of source
4840 +     */
4841 +    public void testDefaultExceptionallyCompose_normalCompletion() {
4842 +        for (boolean createIncomplete : new boolean[] { true, false })
4843 +        for (Integer v1 : new Integer[] { 1, null })
4844 +    {
4845 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4846 +        final ExceptionalCompletableFutureFunction r =
4847 +            new ExceptionalCompletableFutureFunction(ExecutionMode.SYNC);
4848 +        final DelegatedCompletionStage<Integer> d =
4849 +            new DelegatedCompletionStage<Integer>(f);
4850 +        if (!createIncomplete) assertTrue(f.complete(v1));
4851 +        final CompletionStage<Integer> g = d.exceptionallyCompose(r);
4852 +        if (createIncomplete) assertTrue(f.complete(v1));
4853 +
4854 +        checkCompletedNormally(f, v1);
4855 +        checkCompletedNormally(g.toCompletableFuture(), v1);
4856 +        r.assertNotInvoked();
4857 +    }}
4858 +
4859 +    /**
4860 +     * default-implemented exceptionallyCompose result completes
4861 +     * normally after exceptional completion of source
4862 +     */
4863 +    public void testDefaultExceptionallyCompose_exceptionalCompletion() {
4864 +        for (boolean createIncomplete : new boolean[] { true, false })
4865 +    {
4866 +        final CFException ex = new CFException();
4867 +        final ExceptionalCompletableFutureFunction r =
4868 +            new ExceptionalCompletableFutureFunction(ExecutionMode.SYNC);
4869 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4870 +        final DelegatedCompletionStage<Integer> d =
4871 +            new DelegatedCompletionStage<Integer>(f);
4872 +        if (!createIncomplete) f.completeExceptionally(ex);
4873 +        final CompletionStage<Integer> g = d.exceptionallyCompose(r);
4874 +        if (createIncomplete) f.completeExceptionally(ex);
4875 +
4876 +        checkCompletedExceptionally(f, ex);
4877 +        checkCompletedNormally(g.toCompletableFuture(), r.value);
4878 +        r.assertInvoked();
4879 +    }}
4880 +
4881 +    /**
4882 +     * default-implemented exceptionallyCompose completes
4883 +     * exceptionally on exception if action does
4884 +     */
4885 +    public void testDefaultExceptionallyCompose_actionFailed() {
4886 +        for (boolean createIncomplete : new boolean[] { true, false })
4887 +        for (Integer v1 : new Integer[] { 1, null })
4888 +    {
4889 +        final CFException ex = new CFException();
4890 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4891 +        final FailingExceptionalCompletableFutureFunction r
4892 +            = new FailingExceptionalCompletableFutureFunction(ExecutionMode.SYNC);
4893 +        final DelegatedCompletionStage<Integer> d =
4894 +            new DelegatedCompletionStage<Integer>(f);
4895 +        if (!createIncomplete) f.completeExceptionally(ex);
4896 +        final CompletionStage<Integer> g = d.exceptionallyCompose(r);
4897 +        if (createIncomplete) f.completeExceptionally(ex);
4898 +
4899 +        checkCompletedExceptionally(f, ex);
4900 +        checkCompletedWithWrappedException(g.toCompletableFuture(), r.ex);
4901 +        r.assertInvoked();
4902 +    }}
4903 +
4904 +    /**
4905 +     * default exceptionallyComposeAsync result completes normally after normal
4906 +     * completion of source
4907 +     */
4908 +    public void testDefaultExceptionallyComposeAsync_normalCompletion() {
4909 +        for (boolean createIncomplete : new boolean[] { true, false })
4910 +        for (Integer v1 : new Integer[] { 1, null })
4911 +    {
4912 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4913 +        final ExceptionalCompletableFutureFunction r =
4914 +            new ExceptionalCompletableFutureFunction(ExecutionMode.ASYNC);
4915 +        final DelegatedCompletionStage<Integer> d =
4916 +            new DelegatedCompletionStage<Integer>(f);
4917 +        if (!createIncomplete) assertTrue(f.complete(v1));
4918 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r);
4919 +        if (createIncomplete) assertTrue(f.complete(v1));
4920 +
4921 +        checkCompletedNormally(f, v1);
4922 +        checkCompletedNormally(g.toCompletableFuture(), v1);
4923 +        r.assertNotInvoked();
4924 +    }}
4925 +
4926 +    /**
4927 +     * default-implemented exceptionallyComposeAsync result completes
4928 +     * normally after exceptional completion of source
4929 +     */
4930 +    public void testDefaultExceptionallyComposeAsync_exceptionalCompletion() {
4931 +        for (boolean createIncomplete : new boolean[] { true, false })
4932 +    {
4933 +        final CFException ex = new CFException();
4934 +        final ExceptionalCompletableFutureFunction r =
4935 +            new ExceptionalCompletableFutureFunction(ExecutionMode.ASYNC);
4936 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4937 +        final DelegatedCompletionStage<Integer> d =
4938 +            new DelegatedCompletionStage<Integer>(f);
4939 +        if (!createIncomplete) f.completeExceptionally(ex);
4940 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r);
4941 +        if (createIncomplete) f.completeExceptionally(ex);
4942 +
4943 +        checkCompletedExceptionally(f, ex);
4944 +        checkCompletedNormally(g.toCompletableFuture(), r.value);
4945 +        r.assertInvoked();
4946 +    }}
4947 +
4948 +    /**
4949 +     * default-implemented exceptionallyComposeAsync completes
4950 +     * exceptionally on exception if action does
4951 +     */
4952 +    public void testDefaultExceptionallyComposeAsync_actionFailed() {
4953 +        for (boolean createIncomplete : new boolean[] { true, false })
4954 +        for (Integer v1 : new Integer[] { 1, null })
4955 +    {
4956 +        final CFException ex = new CFException();
4957 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4958 +        final FailingExceptionalCompletableFutureFunction r
4959 +            = new FailingExceptionalCompletableFutureFunction(ExecutionMode.ASYNC);
4960 +        final DelegatedCompletionStage<Integer> d =
4961 +            new DelegatedCompletionStage<Integer>(f);
4962 +        if (!createIncomplete) f.completeExceptionally(ex);
4963 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r);
4964 +        if (createIncomplete) f.completeExceptionally(ex);
4965 +
4966 +        checkCompletedExceptionally(f, ex);
4967 +        checkCompletedWithWrappedException(g.toCompletableFuture(), r.ex);
4968 +        r.assertInvoked();
4969 +    }}
4970 +
4971 +
4972 +    /**
4973 +     * default exceptionallyComposeAsync result completes normally after normal
4974 +     * completion of source
4975 +     */
4976 +    public void testDefaultExceptionallyComposeAsyncExecutor_normalCompletion() {
4977 +        for (boolean createIncomplete : new boolean[] { true, false })
4978 +        for (Integer v1 : new Integer[] { 1, null })
4979 +    {
4980 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
4981 +        final ExceptionalCompletableFutureFunction r =
4982 +            new ExceptionalCompletableFutureFunction(ExecutionMode.EXECUTOR);
4983 +        final DelegatedCompletionStage<Integer> d =
4984 +            new DelegatedCompletionStage<Integer>(f);
4985 +        if (!createIncomplete) assertTrue(f.complete(v1));
4986 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r,  new ThreadExecutor());
4987 +        if (createIncomplete) assertTrue(f.complete(v1));
4988 +
4989 +        checkCompletedNormally(f, v1);
4990 +        checkCompletedNormally(g.toCompletableFuture(), v1);
4991 +        r.assertNotInvoked();
4992 +    }}
4993 +
4994 +    /**
4995 +     * default-implemented exceptionallyComposeAsync result completes
4996 +     * normally after exceptional completion of source
4997 +     */
4998 +    public void testDefaultExceptionallyComposeAsyncExecutor_exceptionalCompletion() {
4999 +        for (boolean createIncomplete : new boolean[] { true, false })
5000 +    {
5001 +        final CFException ex = new CFException();
5002 +        final ExceptionalCompletableFutureFunction r =
5003 +            new ExceptionalCompletableFutureFunction(ExecutionMode.EXECUTOR);
5004 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
5005 +        final DelegatedCompletionStage<Integer> d =
5006 +            new DelegatedCompletionStage<Integer>(f);
5007 +        if (!createIncomplete) f.completeExceptionally(ex);
5008 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r,  new ThreadExecutor());
5009 +        if (createIncomplete) f.completeExceptionally(ex);
5010 +
5011 +        checkCompletedExceptionally(f, ex);
5012 +        checkCompletedNormally(g.toCompletableFuture(), r.value);
5013 +        r.assertInvoked();
5014 +    }}
5015 +
5016 +    /**
5017 +     * default-implemented exceptionallyComposeAsync completes
5018 +     * exceptionally on exception if action does
5019 +     */
5020 +    public void testDefaultExceptionallyComposeAsyncExecutor_actionFailed() {
5021 +        for (boolean createIncomplete : new boolean[] { true, false })
5022 +        for (Integer v1 : new Integer[] { 1, null })
5023 +    {
5024 +        final CFException ex = new CFException();
5025 +        final CompletableFuture<Integer> f = new CompletableFuture<>();
5026 +        final FailingExceptionalCompletableFutureFunction r
5027 +            = new FailingExceptionalCompletableFutureFunction(ExecutionMode.EXECUTOR);
5028 +        final DelegatedCompletionStage<Integer> d =
5029 +            new DelegatedCompletionStage<Integer>(f);
5030 +        if (!createIncomplete) f.completeExceptionally(ex);
5031 +        final CompletionStage<Integer> g = d.exceptionallyComposeAsync(r,  new ThreadExecutor());
5032 +        if (createIncomplete) f.completeExceptionally(ex);
5033 +
5034 +        checkCompletedExceptionally(f, ex);
5035 +        checkCompletedWithWrappedException(g.toCompletableFuture(), r.ex);
5036 +        r.assertInvoked();
5037 +    }}
5038 +
5039   }

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