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Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.159 by jsr166, Mon Jun 27 21:39:37 2016 UTC vs.
Revision 1.183 by jsr166, Wed Jan 4 06:09:58 2017 UTC

#	Line 32 | Line 32 | 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.TimeUnit;
35		import java.util.concurrent.atomic.AtomicInteger;
36		import java.util.concurrent.atomic.AtomicReference;
37		import java.util.function.BiConsumer;
#	Line 94 | Line 93 | public class CompletableFutureTest exten
93		* Returns the "raw" internal exceptional completion of f,
94		* without any additional wrapping with CompletionException.
95		*/
96	<	<U> Throwable exceptionalCompletion(CompletableFuture<U> f) {
97	<	// handle (and whenComplete) can distinguish between "direct"
98	<	// and "wrapped" exceptional completion
99	<	return f.handle((U u, Throwable t) -> t).join();
96	>	Throwable exceptionalCompletion(CompletableFuture<?> f) {
97	>	// handle (and whenComplete and exceptionally) can distinguish
98	>	// between "direct" and "wrapped" exceptional completion
99	>	return f.handle((u, t) -> t).join();
100		}
101
102		void checkCompletedExceptionally(CompletableFuture<?> f,
#	Line 148 | Line 147 | public class CompletableFutureTest exten
147
148		void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
149		checkCompletedExceptionally(f, true,
150	<	(t) -> assertTrue(t instanceof CFException));
150	>	t -> assertTrue(t instanceof CFException));
151		}
152
153		void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
154		checkCompletedExceptionally(f, true,
155	<	(t) -> assertTrue(t instanceof CancellationException));
155	>	t -> assertTrue(t instanceof CancellationException));
156		}
157
158		void checkCompletedWithTimeoutException(CompletableFuture<?> f) {
159		checkCompletedExceptionally(f, false,
160	<	(t) -> assertTrue(t instanceof TimeoutException));
160	>	t -> assertTrue(t instanceof TimeoutException));
161		}
162
163		void checkCompletedWithWrappedException(CompletableFuture<?> f,
164		Throwable ex) {
165	<	checkCompletedExceptionally(f, true, (t) -> assertSame(t, ex));
165	>	checkCompletedExceptionally(f, true, t -> assertSame(t, ex));
166		}
167
168		void checkCompletedExceptionally(CompletableFuture<?> f, Throwable ex) {
169	<	checkCompletedExceptionally(f, false, (t) -> assertSame(t, ex));
169	>	checkCompletedExceptionally(f, false, t -> assertSame(t, ex));
170		}
171
172		void checkCancelled(CompletableFuture<?> f) {
#	Line 362 | Line 361 | public class CompletableFutureTest exten
361		checkCompletedNormally(f, "test");
362		}
363
364	<	abstract class CheckedAction {
364	>	abstract static class CheckedAction {
365		int invocationCount = 0;
366		final ExecutionMode m;
367		CheckedAction(ExecutionMode m) { this.m = m; }
#	Line 374 | Line 373 | public class CompletableFutureTest exten
373		void assertInvoked() { assertEquals(1, invocationCount); }
374		}
375
376	<	abstract class CheckedIntegerAction extends CheckedAction {
376	>	abstract static class CheckedIntegerAction extends CheckedAction {
377		Integer value;
378		CheckedIntegerAction(ExecutionMode m) { super(m); }
379		void assertValue(Integer expected) {
#	Line 383 | Line 382 | public class CompletableFutureTest exten
382		}
383		}
384
385	<	class IntegerSupplier extends CheckedAction
385	>	static class IntegerSupplier extends CheckedAction
386		implements Supplier<Integer>
387		{
388		final Integer value;
#	Line 402 | Line 401 | public class CompletableFutureTest exten
401		return (x == null) ? null : x + 1;
402		}
403
404	<	class NoopConsumer extends CheckedIntegerAction
404	>	static class NoopConsumer extends CheckedIntegerAction
405		implements Consumer<Integer>
406		{
407		NoopConsumer(ExecutionMode m) { super(m); }
#	Line 412 | Line 411 | public class CompletableFutureTest exten
411		}
412		}
413
414	<	class IncFunction extends CheckedIntegerAction
414	>	static class IncFunction extends CheckedIntegerAction
415		implements Function<Integer,Integer>
416		{
417		IncFunction(ExecutionMode m) { super(m); }
#	Line 430 | Line 429 | public class CompletableFutureTest exten
429		- ((y == null) ? 99 : y.intValue());
430		}
431
432	<	class SubtractAction extends CheckedIntegerAction
432	>	static class SubtractAction extends CheckedIntegerAction
433		implements BiConsumer<Integer, Integer>
434		{
435		SubtractAction(ExecutionMode m) { super(m); }
#	Line 440 | Line 439 | public class CompletableFutureTest exten
439		}
440		}
441
442	<	class SubtractFunction extends CheckedIntegerAction
442	>	static class SubtractFunction extends CheckedIntegerAction
443		implements BiFunction<Integer, Integer, Integer>
444		{
445		SubtractFunction(ExecutionMode m) { super(m); }
#	Line 450 | Line 449 | public class CompletableFutureTest exten
449		}
450		}
451
452	<	class Noop extends CheckedAction implements Runnable {
452	>	static class Noop extends CheckedAction implements Runnable {
453		Noop(ExecutionMode m) { super(m); }
454		public void run() {
455		invoked();
456		}
457		}
458
459	<	class FailingSupplier extends CheckedAction
459	>	static class FailingSupplier extends CheckedAction
460		implements Supplier<Integer>
461		{
462		final CFException ex;
#	Line 468 | Line 467 | public class CompletableFutureTest exten
467		}
468		}
469
470	<	class FailingConsumer extends CheckedIntegerAction
470	>	static class FailingConsumer extends CheckedIntegerAction
471		implements Consumer<Integer>
472		{
473		final CFException ex;
#	Line 480 | Line 479 | public class CompletableFutureTest exten
479		}
480		}
481
482	<	class FailingBiConsumer extends CheckedIntegerAction
482	>	static class FailingBiConsumer extends CheckedIntegerAction
483		implements BiConsumer<Integer, Integer>
484		{
485		final CFException ex;
#	Line 492 | Line 491 | public class CompletableFutureTest exten
491		}
492		}
493
494	<	class FailingFunction extends CheckedIntegerAction
494	>	static class FailingFunction extends CheckedIntegerAction
495		implements Function<Integer, Integer>
496		{
497		final CFException ex;
#	Line 504 | Line 503 | public class CompletableFutureTest exten
503		}
504		}
505
506	<	class FailingBiFunction extends CheckedIntegerAction
506	>	static class FailingBiFunction extends CheckedIntegerAction
507		implements BiFunction<Integer, Integer, Integer>
508		{
509		final CFException ex;
#	Line 516 | Line 515 | public class CompletableFutureTest exten
515		}
516		}
517
518	<	class FailingRunnable extends CheckedAction implements Runnable {
518	>	static class FailingRunnable extends CheckedAction implements Runnable {
519		final CFException ex;
520		FailingRunnable(ExecutionMode m) { super(m); ex = new CFException(); }
521		public void run() {
#	Line 525 | Line 524 | public class CompletableFutureTest exten
524		}
525		}
526
527	<	class CompletableFutureInc extends CheckedIntegerAction
527	>	static class CompletableFutureInc extends CheckedIntegerAction
528		implements Function<Integer, CompletableFuture<Integer>>
529		{
530		CompletableFutureInc(ExecutionMode m) { super(m); }
#	Line 538 | Line 537 | public class CompletableFutureTest exten
537		}
538		}
539
540	<	class FailingCompletableFutureFunction extends CheckedIntegerAction
540	>	static class FailingCompletableFutureFunction extends CheckedIntegerAction
541		implements Function<Integer, CompletableFuture<Integer>>
542		{
543		final CFException ex;
#	Line 2700 | Line 2699 | public class CompletableFutureTest exten
2699		for (ExecutionMode m : ExecutionMode.values())
2700		for (Integer v1 : new Integer[] { 1, null })
2701		for (Integer v2 : new Integer[] { 2, null })
2702	+	for (boolean pushNop : new boolean[] { true, false })
2703		{
2704		final CompletableFuture<Integer> f = new CompletableFuture<>();
2705		final CompletableFuture<Integer> g = new CompletableFuture<>();
#	Line 2712 | Line 2712 | public class CompletableFutureTest exten
2712		checkIncomplete(h1);
2713		rs[0].assertNotInvoked();
2714		rs[1].assertNotInvoked();
2715	+	if (pushNop) {          // ad hoc test of intra-completion interference
2716	+	m.thenRun(f, () -> {});
2717	+	m.thenRun(g, () -> {});
2718	+	}
2719		f.complete(v1);
2720		checkCompletedNormally(h0, null);
2721		checkCompletedNormally(h1, null);
#	Line 3253 | Line 3257 | public class CompletableFutureTest exten
3257
3258		() -> f.thenApply(null),
3259		() -> f.thenApplyAsync(null),
3260	<	() -> f.thenApplyAsync((x) -> x, null),
3260	>	() -> f.thenApplyAsync(x -> x, null),
3261		() -> f.thenApplyAsync(null, exec),
3262
3263		() -> f.thenAccept(null),
3264		() -> f.thenAcceptAsync(null),
3265	<	() -> f.thenAcceptAsync((x) -> {} , null),
3265	>	() -> f.thenAcceptAsync(x -> {} , null),
3266		() -> f.thenAcceptAsync(null, exec),
3267
3268		() -> f.thenRun(null),
#	Line 3293 | Line 3297 | public class CompletableFutureTest exten
3297		() -> f.applyToEither(g, null),
3298		() -> f.applyToEitherAsync(g, null),
3299		() -> f.applyToEitherAsync(g, null, exec),
3300	<	() -> f.applyToEither(nullFuture, (x) -> x),
3301	<	() -> f.applyToEitherAsync(nullFuture, (x) -> x),
3302	<	() -> f.applyToEitherAsync(nullFuture, (x) -> x, exec),
3303	<	() -> f.applyToEitherAsync(g, (x) -> x, null),
3300	>	() -> f.applyToEither(nullFuture, x -> x),
3301	>	() -> f.applyToEitherAsync(nullFuture, x -> x),
3302	>	() -> f.applyToEitherAsync(nullFuture, x -> x, exec),
3303	>	() -> f.applyToEitherAsync(g, x -> x, null),
3304
3305		() -> f.acceptEither(g, null),
3306		() -> f.acceptEitherAsync(g, null),
3307		() -> f.acceptEitherAsync(g, null, exec),
3308	<	() -> f.acceptEither(nullFuture, (x) -> {}),
3309	<	() -> f.acceptEitherAsync(nullFuture, (x) -> {}),
3310	<	() -> f.acceptEitherAsync(nullFuture, (x) -> {}, exec),
3311	<	() -> f.acceptEitherAsync(g, (x) -> {}, null),
3308	>	() -> f.acceptEither(nullFuture, x -> {}),
3309	>	() -> f.acceptEitherAsync(nullFuture, x -> {}),
3310	>	() -> f.acceptEitherAsync(nullFuture, x -> {}, exec),
3311	>	() -> f.acceptEitherAsync(g, x -> {}, null),
3312
3313		() -> f.runAfterEither(g, null),
3314		() -> f.runAfterEitherAsync(g, null),
#	Line 3354 | Line 3358 | public class CompletableFutureTest exten
3358		* Test submissions to an executor that rejects all tasks.
3359		*/
3360		public void testRejectingExecutor() {
3361	<	for (Integer v : new Integer[] { 1, null }) {
3362	<
3361	>	for (Integer v : new Integer[] { 1, null })
3362	>	{
3363		final CountingRejectingExecutor e = new CountingRejectingExecutor();
3364
3365		final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
#	Line 3370 | Line 3374 | public class CompletableFutureTest exten
3374		for (CompletableFuture<Integer> src : srcs) {
3375		List<CompletableFuture<?>> fs = new ArrayList<>();
3376		fs.add(src.thenRunAsync(() -> {}, e));
3377	<	fs.add(src.thenAcceptAsync((z) -> {}, e));
3378	<	fs.add(src.thenApplyAsync((z) -> z, e));
3377	>	fs.add(src.thenAcceptAsync(z -> {}, e));
3378	>	fs.add(src.thenApplyAsync(z -> z, e));
3379
3380		fs.add(src.thenCombineAsync(src, (x, y) -> x, e));
3381		fs.add(src.thenAcceptBothAsync(src, (x, y) -> {}, e));
3382		fs.add(src.runAfterBothAsync(src, () -> {}, e));
3383
3384	<	fs.add(src.applyToEitherAsync(src, (z) -> z, e));
3385	<	fs.add(src.acceptEitherAsync(src, (z) -> {}, e));
3384	>	fs.add(src.applyToEitherAsync(src, z -> z, e));
3385	>	fs.add(src.acceptEitherAsync(src, z -> {}, e));
3386		fs.add(src.runAfterEitherAsync(src, () -> {}, e));
3387
3388	<	fs.add(src.thenComposeAsync((z) -> null, e));
3388	>	fs.add(src.thenComposeAsync(z -> null, e));
3389		fs.add(src.whenCompleteAsync((z, t) -> {}, e));
3390		fs.add(src.handleAsync((z, t) -> null, e));
3391
#	Line 3414 | Line 3418 | public class CompletableFutureTest exten
3418		{
3419		List<CompletableFuture<?>> fs = new ArrayList<>();
3420
3421	<	fs.add(complete.applyToEitherAsync(incomplete, (z) -> z, e));
3422	<	fs.add(incomplete.applyToEitherAsync(complete, (z) -> z, e));
3421	>	fs.add(complete.applyToEitherAsync(incomplete, z -> z, e));
3422	>	fs.add(incomplete.applyToEitherAsync(complete, z -> z, e));
3423
3424	<	fs.add(complete.acceptEitherAsync(incomplete, (z) -> {}, e));
3425	<	fs.add(incomplete.acceptEitherAsync(complete, (z) -> {}, e));
3424	>	fs.add(complete.acceptEitherAsync(incomplete, z -> {}, e));
3425	>	fs.add(incomplete.acceptEitherAsync(complete, z -> {}, e));
3426
3427		fs.add(complete.runAfterEitherAsync(incomplete, () -> {}, e));
3428		fs.add(incomplete.runAfterEitherAsync(complete, () -> {}, e));
#	Line 3434 | Line 3438 | public class CompletableFutureTest exten
3438		checkCompletedWithWrappedException(future, e.ex);
3439
3440		assertEquals(futures.size(), e.count.get());
3441	<
3438	<	}
3439	<	}
3441	>	}}
3442
3443		/**
3444		* Test submissions to an executor that rejects all tasks, but
#	Line 3444 | Line 3446 | public class CompletableFutureTest exten
3446		* explicitly completed.
3447		*/
3448		public void testRejectingExecutorNeverInvoked() {
3449	+	for (Integer v : new Integer[] { 1, null })
3450	+	{
3451		final CountingRejectingExecutor e = new CountingRejectingExecutor();
3452
3449	–	for (Integer v : new Integer[] { 1, null }) {
3450	–
3453		final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3454		final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3455
#	Line 3459 | Line 3461 | public class CompletableFutureTest exten
3461
3462		List<CompletableFuture<?>> fs = new ArrayList<>();
3463		fs.add(incomplete.thenRunAsync(() -> {}, e));
3464	<	fs.add(incomplete.thenAcceptAsync((z) -> {}, e));
3465	<	fs.add(incomplete.thenApplyAsync((z) -> z, e));
3464	>	fs.add(incomplete.thenAcceptAsync(z -> {}, e));
3465	>	fs.add(incomplete.thenApplyAsync(z -> z, e));
3466
3467		fs.add(incomplete.thenCombineAsync(incomplete, (x, y) -> x, e));
3468		fs.add(incomplete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3469		fs.add(incomplete.runAfterBothAsync(incomplete, () -> {}, e));
3470
3471	<	fs.add(incomplete.applyToEitherAsync(incomplete, (z) -> z, e));
3472	<	fs.add(incomplete.acceptEitherAsync(incomplete, (z) -> {}, e));
3471	>	fs.add(incomplete.applyToEitherAsync(incomplete, z -> z, e));
3472	>	fs.add(incomplete.acceptEitherAsync(incomplete, z -> {}, e));
3473		fs.add(incomplete.runAfterEitherAsync(incomplete, () -> {}, e));
3474
3475	<	fs.add(incomplete.thenComposeAsync((z) -> null, e));
3475	>	fs.add(incomplete.thenComposeAsync(z -> null, e));
3476		fs.add(incomplete.whenCompleteAsync((z, t) -> {}, e));
3477		fs.add(incomplete.handleAsync((z, t) -> null, e));
3478
#	Line 3495 | Line 3497 | public class CompletableFutureTest exten
3497		checkCompletedNormally(future, null);
3498
3499		assertEquals(0, e.count.get());
3500	<
3499	<	}
3500	<	}
3500	>	}}
3501
3502		/**
3503		* toCompletableFuture returns this CompletableFuture.
#	Line 3532 | Line 3532 | public class CompletableFutureTest exten
3532		*/
3533		public void testCompletedStage() {
3534		AtomicInteger x = new AtomicInteger(0);
3535	<	AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3535	>	AtomicReference<Throwable> r = new AtomicReference<>();
3536		CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3537		f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3538		assertEquals(x.get(), 1);
#	Line 3577 | Line 3577 | public class CompletableFutureTest exten
3577		* copy returns a CompletableFuture that is completed normally,
3578		* with the same value, when source is.
3579		*/
3580	<	public void testCopy() {
3580	>	public void testCopy_normalCompletion() {
3581	>	for (boolean createIncomplete : new boolean[] { true, false })
3582	>	for (Integer v1 : new Integer[] { 1, null })
3583	>	{
3584		CompletableFuture<Integer> f = new CompletableFuture<>();
3585	+	if (!createIncomplete) assertTrue(f.complete(v1));
3586		CompletableFuture<Integer> g = f.copy();
3587	<	checkIncomplete(f);
3588	<	checkIncomplete(g);
3589	<	f.complete(1);
3590	<	checkCompletedNormally(f, 1);
3591	<	checkCompletedNormally(g, 1);
3592	<	}
3587	>	if (createIncomplete) {
3588	>	checkIncomplete(f);
3589	>	checkIncomplete(g);
3590	>	assertTrue(f.complete(v1));
3591	>	}
3592	>	checkCompletedNormally(f, v1);
3593	>	checkCompletedNormally(g, v1);
3594	>	}}
3595
3596		/**
3597		* copy returns a CompletableFuture that is completed exceptionally
3598		* when source is.
3599		*/
3600	<	public void testCopy2() {
3600	>	public void testCopy_exceptionalCompletion() {
3601	>	for (boolean createIncomplete : new boolean[] { true, false })
3602	>	{
3603	>	CFException ex = new CFException();
3604		CompletableFuture<Integer> f = new CompletableFuture<>();
3605	+	if (!createIncomplete) f.completeExceptionally(ex);
3606		CompletableFuture<Integer> g = f.copy();
3607	<	checkIncomplete(f);
3608	<	checkIncomplete(g);
3609	<	CFException ex = new CFException();
3610	<	f.completeExceptionally(ex);
3607	>	if (createIncomplete) {
3608	>	checkIncomplete(f);
3609	>	checkIncomplete(g);
3610	>	f.completeExceptionally(ex);
3611	>	}
3612		checkCompletedExceptionally(f, ex);
3613		checkCompletedWithWrappedException(g, ex);
3614	+	}}
3615	+
3616	+	/**
3617	+	* Completion of a copy does not complete its source.
3618	+	*/
3619	+	public void testCopy_oneWayPropagation() {
3620	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3621	+	assertTrue(f.copy().complete(1));
3622	+	assertTrue(f.copy().complete(null));
3623	+	assertTrue(f.copy().cancel(true));
3624	+	assertTrue(f.copy().cancel(false));
3625	+	assertTrue(f.copy().completeExceptionally(new CFException()));
3626	+	checkIncomplete(f);
3627		}
3628
3629		/**
#	Line 3610 | Line 3634 | public class CompletableFutureTest exten
3634		CompletableFuture<Integer> f = new CompletableFuture<>();
3635		CompletionStage<Integer> g = f.minimalCompletionStage();
3636		AtomicInteger x = new AtomicInteger(0);
3637	<	AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3637	>	AtomicReference<Throwable> r = new AtomicReference<>();
3638		checkIncomplete(f);
3639		g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3640		f.complete(1);
#	Line 3627 | Line 3651 | public class CompletableFutureTest exten
3651		CompletableFuture<Integer> f = new CompletableFuture<>();
3652		CompletionStage<Integer> g = f.minimalCompletionStage();
3653		AtomicInteger x = new AtomicInteger(0);
3654	<	AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3654	>	AtomicReference<Throwable> r = new AtomicReference<>();
3655		g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3656		checkIncomplete(f);
3657		CFException ex = new CFException();
#	Line 3645 | Line 3669 | public class CompletableFutureTest exten
3669		CFException ex = new CFException();
3670		CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3671		AtomicInteger x = new AtomicInteger(0);
3672	<	AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3672	>	AtomicReference<Throwable> r = new AtomicReference<>();
3673		f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3674		assertEquals(x.get(), 0);
3675		assertEquals(r.get(), ex);
#	Line 3669 | Line 3693 | public class CompletableFutureTest exten
3693		public void testCompleteAsync2() {
3694		CompletableFuture<Integer> f = new CompletableFuture<>();
3695		CFException ex = new CFException();
3696	<	f.completeAsync(() -> {if (true) throw ex; return 1;});
3696	>	f.completeAsync(() -> { throw ex; });
3697		try {
3698		f.join();
3699		shouldThrow();
#	Line 3699 | Line 3723 | public class CompletableFutureTest exten
3723		CompletableFuture<Integer> f = new CompletableFuture<>();
3724		CFException ex = new CFException();
3725		ThreadExecutor executor = new ThreadExecutor();
3726	<	f.completeAsync(() -> {if (true) throw ex; return 1;}, executor);
3726	>	f.completeAsync(() -> { throw ex; }, executor);
3727		try {
3728		f.join();
3729		shouldThrow();
#	Line 3851 | Line 3875 | public class CompletableFutureTest exten
3875		final CompletableFuture<Integer> v42 = CompletableFuture.completedFuture(42);
3876		final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3877
3878	+	final Runnable noopRunnable = new Noop(m);
3879	+	final Consumer<Integer> noopConsumer = new NoopConsumer(m);
3880	+	final Function<Integer, Integer> incFunction = new IncFunction(m);
3881	+
3882		List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> funs
3883		= new ArrayList<>();
3884
3885	<	funs.add((y) -> m.thenRun(y, new Noop(m)));
3886	<	funs.add((y) -> m.thenAccept(y, new NoopConsumer(m)));
3887	<	funs.add((y) -> m.thenApply(y, new IncFunction(m)));
3888	<
3889	<	funs.add((y) -> m.runAfterEither(y, incomplete, new Noop(m)));
3890	<	funs.add((y) -> m.acceptEither(y, incomplete, new NoopConsumer(m)));
3891	<	funs.add((y) -> m.applyToEither(y, incomplete, new IncFunction(m)));
3892	<
3893	<	funs.add((y) -> m.runAfterBoth(y, v42, new Noop(m)));
3894	<	funs.add((y) -> m.runAfterBoth(v42, y, new Noop(m)));
3895	<	funs.add((y) -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3896	<	funs.add((y) -> m.thenAcceptBoth(v42, y, new SubtractAction(m)));
3897	<	funs.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m)));
3898	<	funs.add((y) -> m.thenCombine(v42, y, new SubtractFunction(m)));
3899	<
3900	<	funs.add((y) -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
3901	<
3902	<	funs.add((y) -> m.thenCompose(y, new CompletableFutureInc(m)));
3903	<
3904	<	funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y}));
3905	<	funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y, v42}));
3906	<	funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {v42, y}));
3907	<	funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y}));
3908	<	funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y, incomplete}));
3909	<	funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {incomplete, y}));
3885	>	funs.add(y -> m.thenRun(y, noopRunnable));
3886	>	funs.add(y -> m.thenAccept(y, noopConsumer));
3887	>	funs.add(y -> m.thenApply(y, incFunction));
3888	>
3889	>	funs.add(y -> m.runAfterEither(y, incomplete, noopRunnable));
3890	>	funs.add(y -> m.acceptEither(y, incomplete, noopConsumer));
3891	>	funs.add(y -> m.applyToEither(y, incomplete, incFunction));
3892	>
3893	>	funs.add(y -> m.runAfterBoth(y, v42, noopRunnable));
3894	>	funs.add(y -> m.runAfterBoth(v42, y, noopRunnable));
3895	>	funs.add(y -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3896	>	funs.add(y -> m.thenAcceptBoth(v42, y, new SubtractAction(m)));
3897	>	funs.add(y -> m.thenCombine(y, v42, new SubtractFunction(m)));
3898	>	funs.add(y -> m.thenCombine(v42, y, new SubtractFunction(m)));
3899	>
3900	>	funs.add(y -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
3901	>
3902	>	funs.add(y -> m.thenCompose(y, new CompletableFutureInc(m)));
3903	>
3904	>	funs.add(y -> CompletableFuture.allOf(y));
3905	>	funs.add(y -> CompletableFuture.allOf(y, v42));
3906	>	funs.add(y -> CompletableFuture.allOf(v42, y));
3907	>	funs.add(y -> CompletableFuture.anyOf(y));
3908	>	funs.add(y -> CompletableFuture.anyOf(y, incomplete));
3909	>	funs.add(y -> CompletableFuture.anyOf(incomplete, y));
3910
3911		for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3912		fun : funs) {
3913		CompletableFuture<Integer> f = new CompletableFuture<>();
3914		f.completeExceptionally(ex);
3915	<	CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3915	>	CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3916		checkCompletedWithWrappedException(src, ex);
3917		CompletableFuture<?> dep = fun.apply(src);
3918		checkCompletedWithWrappedException(dep, ex);
#	Line 3894 | Line 3922 | public class CompletableFutureTest exten
3922		for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3923		fun : funs) {
3924		CompletableFuture<Integer> f = new CompletableFuture<>();
3925	<	CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3925	>	CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3926		CompletableFuture<?> dep = fun.apply(src);
3927		f.completeExceptionally(ex);
3928		checkCompletedWithWrappedException(src, ex);
#	Line 3908 | Line 3936 | public class CompletableFutureTest exten
3936		CompletableFuture<Integer> f = new CompletableFuture<>();
3937		f.cancel(mayInterruptIfRunning);
3938		checkCancelled(f);
3939	<	CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3939	>	CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3940		checkCompletedWithWrappedCancellationException(src);
3941		CompletableFuture<?> dep = fun.apply(src);
3942		checkCompletedWithWrappedCancellationException(dep);
#	Line 3919 | Line 3947 | public class CompletableFutureTest exten
3947		for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3948		fun : funs) {
3949		CompletableFuture<Integer> f = new CompletableFuture<>();
3950	<	CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3950	>	CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3951		CompletableFuture<?> dep = fun.apply(src);
3952		f.cancel(mayInterruptIfRunning);
3953		checkCancelled(f);
#	Line 3930 | Line 3958 | public class CompletableFutureTest exten
3958		}}
3959
3960		/**
3961	<	* Minimal completion stages throw UOE for all non-CompletionStage methods
3961	>	* Minimal completion stages throw UOE for most non-CompletionStage methods
3962		*/
3963		public void testMinimalCompletionStage_minimality() {
3964		if (!testImplementationDetails) return;
3965		Function<Method, String> toSignature =
3966	<	(method) -> method.getName() + Arrays.toString(method.getParameterTypes());
3966	>	method -> method.getName() + Arrays.toString(method.getParameterTypes());
3967		Predicate<Method> isNotStatic =
3968	<	(method) -> (method.getModifiers() & Modifier.STATIC) == 0;
3968	>	method -> (method.getModifiers() & Modifier.STATIC) == 0;
3969		List<Method> minimalMethods =
3970		Stream.of(Object.class, CompletionStage.class)
3971	<	.flatMap((klazz) -> Stream.of(klazz.getMethods()))
3971	>	.flatMap(klazz -> Stream.of(klazz.getMethods()))
3972		.filter(isNotStatic)
3973		.collect(Collectors.toList());
3974		// Methods from CompletableFuture permitted NOT to throw UOE
#	Line 3956 | Line 3984 | public class CompletableFutureTest exten
3984		.collect(Collectors.toSet());
3985		List<Method> allMethods = Stream.of(CompletableFuture.class.getMethods())
3986		.filter(isNotStatic)
3987	<	.filter((method) -> !permittedMethodSignatures.contains(toSignature.apply(method)))
3987	>	.filter(method -> !permittedMethodSignatures.contains(toSignature.apply(method)))
3988		.collect(Collectors.toList());
3989
3990	<	CompletionStage<Integer> minimalStage =
3990	>	List<CompletionStage<Integer>> stages = new ArrayList<>();
3991	>	CompletionStage<Integer> min =
3992		new CompletableFuture<Integer>().minimalCompletionStage();
3993	+	stages.add(min);
3994	+	stages.add(min.thenApply(x -> x));
3995	+	stages.add(CompletableFuture.completedStage(1));
3996	+	stages.add(CompletableFuture.failedStage(new CFException()));
3997
3998		List<Method> bugs = new ArrayList<>();
3999		for (Method method : allMethods) {
#	Line 3976 | Line 4009 | public class CompletableFutureTest exten
4009		else if (parameterTypes[i] == long.class)
4010		args[i] = 0L;
4011		}
4012	<	try {
4013	<	method.invoke(minimalStage, args);
4014	<	bugs.add(method);
3982	<	}
3983	<	catch (java.lang.reflect.InvocationTargetException expected) {
3984	<	if (! (expected.getCause() instanceof UnsupportedOperationException)) {
4012	>	for (CompletionStage<Integer> stage : stages) {
4013	>	try {
4014	>	method.invoke(stage, args);
4015		bugs.add(method);
3986	–	// expected.getCause().printStackTrace();
4016		}
4017	+	catch (java.lang.reflect.InvocationTargetException expected) {
4018	+	if (! (expected.getCause() instanceof UnsupportedOperationException)) {
4019	+	bugs.add(method);
4020	+	// expected.getCause().printStackTrace();
4021	+	}
4022	+	}
4023	+	catch (ReflectiveOperationException bad) { throw new Error(bad); }
4024		}
3989	–	catch (ReflectiveOperationException bad) { throw new Error(bad); }
4025		}
4026		if (!bugs.isEmpty())
4027	<	throw new Error("Methods did not throw UOE: " + bugs.toString());
4027	>	throw new Error("Methods did not throw UOE: " + bugs);
4028	>	}
4029	>
4030	>	/**
4031	>	* minimalStage.toCompletableFuture() returns a CompletableFuture that
4032	>	* is completed normally, with the same value, when source is.
4033	>	*/
4034	>	public void testMinimalCompletionStage_toCompletableFuture_normalCompletion() {
4035	>	for (boolean createIncomplete : new boolean[] { true, false })
4036	>	for (Integer v1 : new Integer[] { 1, null })
4037	>	{
4038	>	CompletableFuture<Integer> f = new CompletableFuture<>();
4039	>	CompletionStage<Integer> minimal = f.minimalCompletionStage();
4040	>	if (!createIncomplete) assertTrue(f.complete(v1));
4041	>	CompletableFuture<Integer> g = minimal.toCompletableFuture();
4042	>	if (createIncomplete) {
4043	>	checkIncomplete(f);
4044	>	checkIncomplete(g);
4045	>	assertTrue(f.complete(v1));
4046	>	}
4047	>	checkCompletedNormally(f, v1);
4048	>	checkCompletedNormally(g, v1);
4049	>	}}
4050	>
4051	>	/**
4052	>	* minimalStage.toCompletableFuture() returns a CompletableFuture that
4053	>	* is completed exceptionally when source is.
4054	>	*/
4055	>	public void testMinimalCompletionStage_toCompletableFuture_exceptionalCompletion() {
4056	>	for (boolean createIncomplete : new boolean[] { true, false })
4057	>	{
4058	>	CFException ex = new CFException();
4059	>	CompletableFuture<Integer> f = new CompletableFuture<>();
4060	>	CompletionStage<Integer> minimal = f.minimalCompletionStage();
4061	>	if (!createIncomplete) f.completeExceptionally(ex);
4062	>	CompletableFuture<Integer> g = minimal.toCompletableFuture();
4063	>	if (createIncomplete) {
4064	>	checkIncomplete(f);
4065	>	checkIncomplete(g);
4066	>	f.completeExceptionally(ex);
4067	>	}
4068	>	checkCompletedExceptionally(f, ex);
4069	>	checkCompletedWithWrappedException(g, ex);
4070	>	}}
4071	>
4072	>	/**
4073	>	* minimalStage.toCompletableFuture() gives mutable CompletableFuture
4074	>	*/
4075	>	public void testMinimalCompletionStage_toCompletableFuture_mutable() {
4076	>	for (Integer v1 : new Integer[] { 1, null })
4077	>	{
4078	>	CompletableFuture<Integer> f = new CompletableFuture<>();
4079	>	CompletionStage minimal = f.minimalCompletionStage();
4080	>	CompletableFuture<Integer> g = minimal.toCompletableFuture();
4081	>	assertTrue(g.complete(v1));
4082	>	checkCompletedNormally(g, v1);
4083	>	checkIncomplete(f);
4084	>	checkIncomplete(minimal.toCompletableFuture());
4085	>	}}
4086	>
4087	>	/**
4088	>	* minimalStage.toCompletableFuture().join() awaits completion
4089	>	*/
4090	>	public void testMinimalCompletionStage_toCompletableFuture_join() throws Exception {
4091	>	for (boolean createIncomplete : new boolean[] { true, false })
4092	>	for (Integer v1 : new Integer[] { 1, null })
4093	>	{
4094	>	CompletableFuture<Integer> f = new CompletableFuture<>();
4095	>	if (!createIncomplete) assertTrue(f.complete(v1));
4096	>	CompletionStage<Integer> minimal = f.minimalCompletionStage();
4097	>	if (createIncomplete) assertTrue(f.complete(v1));
4098	>	assertEquals(v1, minimal.toCompletableFuture().join());
4099	>	assertEquals(v1, minimal.toCompletableFuture().get());
4100	>	checkCompletedNormally(minimal.toCompletableFuture(), v1);
4101	>	}}
4102	>
4103	>	/**
4104	>	* Completion of a toCompletableFuture copy of a minimal stage
4105	>	* does not complete its source.
4106	>	*/
4107	>	public void testMinimalCompletionStage_toCompletableFuture_oneWayPropagation() {
4108	>	CompletableFuture<Integer> f = new CompletableFuture<>();
4109	>	CompletionStage<Integer> g = f.minimalCompletionStage();
4110	>	assertTrue(g.toCompletableFuture().complete(1));
4111	>	assertTrue(g.toCompletableFuture().complete(null));
4112	>	assertTrue(g.toCompletableFuture().cancel(true));
4113	>	assertTrue(g.toCompletableFuture().cancel(false));
4114	>	assertTrue(g.toCompletableFuture().completeExceptionally(new CFException()));
4115	>	checkIncomplete(g.toCompletableFuture());
4116	>	f.complete(1);
4117	>	checkCompletedNormally(g.toCompletableFuture(), 1);
4118		}
4119
4120	+	/** Demo utility method for external reliable toCompletableFuture */
4121	+	static <T> CompletableFuture<T> toCompletableFuture(CompletionStage<T> stage) {
4122	+	CompletableFuture<T> f = new CompletableFuture<>();
4123	+	stage.handle((T t, Throwable ex) -> {
4124	+	if (ex != null) f.completeExceptionally(ex);
4125	+	else f.complete(t);
4126	+	return null;
4127	+	});
4128	+	return f;
4129	+	}
4130	+
4131	+	/** Demo utility method to join a CompletionStage */
4132	+	static <T> T join(CompletionStage<T> stage) {
4133	+	return toCompletableFuture(stage).join();
4134	+	}
4135	+
4136	+	/**
4137	+	* Joining a minimal stage "by hand" works
4138	+	*/
4139	+	public void testMinimalCompletionStage_join_by_hand() {
4140	+	for (boolean createIncomplete : new boolean[] { true, false })
4141	+	for (Integer v1 : new Integer[] { 1, null })
4142	+	{
4143	+	CompletableFuture<Integer> f = new CompletableFuture<>();
4144	+	CompletionStage<Integer> minimal = f.minimalCompletionStage();
4145	+	CompletableFuture<Integer> g = new CompletableFuture<>();
4146	+	if (!createIncomplete) assertTrue(f.complete(v1));
4147	+	minimal.thenAccept(x -> g.complete(x));
4148	+	if (createIncomplete) assertTrue(f.complete(v1));
4149	+	g.join();
4150	+	checkCompletedNormally(g, v1);
4151	+	checkCompletedNormally(f, v1);
4152	+	assertEquals(v1, join(minimal));
4153	+	}}
4154	+
4155		static class Monad {
4156		static class ZeroException extends RuntimeException {
4157		public ZeroException() { super("monadic zero"); }
#	Line 4008 | Line 4168 | public class CompletableFutureTest exten
4168		static <T,U,V> Function<T, CompletableFuture<V>> compose
4169		(Function<T, CompletableFuture<U>> f,
4170		Function<U, CompletableFuture<V>> g) {
4171	<	return (x) -> f.apply(x).thenCompose(g);
4171	>	return x -> f.apply(x).thenCompose(g);
4172		}
4173
4174		static void assertZero(CompletableFuture<?> f) {
#	Line 4088 | Line 4248 | public class CompletableFutureTest exten
4248
4249		// Some mutually non-commutative functions
4250		Function<Long, CompletableFuture<Long>> triple
4251	<	= (x) -> Monad.unit(3 * x);
4251	>	= x -> Monad.unit(3 * x);
4252		Function<Long, CompletableFuture<Long>> inc
4253	<	= (x) -> Monad.unit(x + 1);
4253	>	= x -> Monad.unit(x + 1);
4254
4255		// unit is a right identity: m >>= unit === m
4256		Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
#	Line 4102 | Line 4262 | public class CompletableFutureTest exten
4262		// associativity: (m >>= f) >>= g === m >>= ( \x -> (f x >>= g) )
4263		Monad.assertFutureEquals(
4264		unit.apply(5L).thenCompose(inc).thenCompose(triple),
4265	<	unit.apply(5L).thenCompose((x) -> inc.apply(x).thenCompose(triple)));
4265	>	unit.apply(5L).thenCompose(x -> inc.apply(x).thenCompose(triple)));
4266
4267		// The case for CompletableFuture as an additive monad is weaker...
4268
#	Line 4112 | Line 4272 | public class CompletableFutureTest exten
4272		// left zero: zero >>= f === zero
4273		Monad.assertZero(zero.thenCompose(inc));
4274		// right zero: f >>= (\x -> zero) === zero
4275	<	Monad.assertZero(inc.apply(5L).thenCompose((x) -> zero));
4275	>	Monad.assertZero(inc.apply(5L).thenCompose(x -> zero));
4276
4277		// f plus zero === f
4278		Monad.assertFutureEquals(Monad.unit(5L),
#	Line 4138 | Line 4298 | public class CompletableFutureTest exten
4298		Monad.plus(godot, Monad.unit(5L)));
4299		}
4300
4301	+	/** Test long recursive chains of CompletableFutures with cascading completions */
4302	+	public void testRecursiveChains() throws Throwable {
4303	+	for (ExecutionMode m : ExecutionMode.values())
4304	+	for (boolean addDeadEnds : new boolean[] { true, false })
4305	+	{
4306	+	final int val = 42;
4307	+	final int n = expensiveTests ? 1_000 : 2;
4308	+	CompletableFuture<Integer> head = new CompletableFuture<>();
4309	+	CompletableFuture<Integer> tail = head;
4310	+	for (int i = 0; i < n; i++) {
4311	+	if (addDeadEnds) m.thenApply(tail, v -> v + 1);
4312	+	tail = m.thenApply(tail, v -> v + 1);
4313	+	if (addDeadEnds) m.applyToEither(tail, tail, v -> v + 1);
4314	+	tail = m.applyToEither(tail, tail, v -> v + 1);
4315	+	if (addDeadEnds) m.thenCombine(tail, tail, (v, w) -> v + 1);
4316	+	tail = m.thenCombine(tail, tail, (v, w) -> v + 1);
4317	+	}
4318	+	head.complete(val);
4319	+	assertEquals(val + 3 * n, (int) tail.join());
4320	+	}}
4321	+
4322		/**
4323		* A single CompletableFuture with many dependents.
4324		* A demo of scalability - runtime is O(n).
#	Line 4149 | Line 4330 | public class CompletableFutureTest exten
4330		final AtomicInteger count = new AtomicInteger(0);
4331		for (int i = 0; i < n; i++) {
4332		head.thenRun(() -> count.getAndIncrement());
4333	<	head.thenAccept((x) -> count.getAndIncrement());
4334	<	head.thenApply((x) -> count.getAndIncrement());
4333	>	head.thenAccept(x -> count.getAndIncrement());
4334	>	head.thenApply(x -> count.getAndIncrement());
4335
4336		head.runAfterBoth(complete, () -> count.getAndIncrement());
4337		head.thenAcceptBoth(complete, (x, y) -> count.getAndIncrement());
#	Line 4160 | Line 4341 | public class CompletableFutureTest exten
4341		complete.thenCombine(head, (x, y) -> count.getAndIncrement());
4342
4343		head.runAfterEither(new CompletableFuture<Void>(), () -> count.getAndIncrement());
4344	<	head.acceptEither(new CompletableFuture<Void>(), (x) -> count.getAndIncrement());
4345	<	head.applyToEither(new CompletableFuture<Void>(), (x) -> count.getAndIncrement());
4344	>	head.acceptEither(new CompletableFuture<Void>(), x -> count.getAndIncrement());
4345	>	head.applyToEither(new CompletableFuture<Void>(), x -> count.getAndIncrement());
4346		new CompletableFuture<Void>().runAfterEither(head, () -> count.getAndIncrement());
4347	<	new CompletableFuture<Void>().acceptEither(head, (x) -> count.getAndIncrement());
4348	<	new CompletableFuture<Void>().applyToEither(head, (x) -> count.getAndIncrement());
4347	>	new CompletableFuture<Void>().acceptEither(head, x -> count.getAndIncrement());
4348	>	new CompletableFuture<Void>().applyToEither(head, x -> count.getAndIncrement());
4349		}
4350		head.complete(null);
4351		assertEquals(5 * 3 * n, count.get());
4352		}
4353
4354	<	/** ant -Dvmoptions=-Xmx8m -Djsr166.tckTestClass=CompletableFutureTest tck */
4355	<	public void testCoCompletionGarbage() throws Throwable {
4354	>	/** ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest tck */
4355	>	public void testCoCompletionGarbageRetention() throws Throwable {
4356		final int n = expensiveTests ? 1_000_000 : 10;
4357		final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
4358		CompletableFuture<Integer> f;
#	Line 4181 | Line 4362 | public class CompletableFutureTest exten
4362		f.complete(null);
4363
4364		f = new CompletableFuture<>();
4365	<	f.acceptEither(incomplete, (x) -> {});
4365	>	f.acceptEither(incomplete, x -> {});
4366		f.complete(null);
4367
4368		f = new CompletableFuture<>();
4369	<	f.applyToEither(incomplete, (x) -> x);
4369	>	f.applyToEither(incomplete, x -> x);
4370		f.complete(null);
4371
4372		f = new CompletableFuture<>();
#	Line 4199 | Line 4380 | public class CompletableFutureTest exten
4380		f.complete(null);
4381
4382		f = new CompletableFuture<>();
4383	<	incomplete.acceptEither(f, (x) -> {});
4383	>	incomplete.acceptEither(f, x -> {});
4384		f.complete(null);
4385
4386		f = new CompletableFuture<>();
4387	<	incomplete.applyToEither(f, (x) -> x);
4387	>	incomplete.applyToEither(f, x -> x);
4388		f.complete(null);
4389
4390		f = new CompletableFuture<>();
#	Line 4212 | Line 4393 | public class CompletableFutureTest exten
4393		}
4394		}
4395
4396	<	/*
4397	<	* Tests below currently fail in stress mode due to memory retention.
4398	<	* ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest tck
4396	>	/**
4397	>	* Reproduction recipe for:
4398	>	* 8160402: Garbage retention with CompletableFuture.anyOf
4399	>	* 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
4400		*/
4219	–
4220	–	/** Checks for garbage retention with anyOf. */
4401		public void testAnyOfGarbageRetention() throws Throwable {
4402		for (Integer v : new Integer[] { 1, null })
4403		{
#	Line 4231 | Line 4411 | public class CompletableFutureTest exten
4411		checkCompletedNormally(CompletableFuture.anyOf(fs), v);
4412		}}
4413
4414	<	/** Checks for garbage retention with allOf. */
4414	>	/**
4415	>	* Checks for garbage retention with allOf.
4416	>	*
4417	>	* As of 2016-07, fails with OOME:
4418	>	* ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledAllOfGarbageRetention tck
4419	>	*/
4420		public void testCancelledAllOfGarbageRetention() throws Throwable {
4421		final int n = expensiveTests ? 100_000 : 10;
4422		CompletableFuture<Integer>[] fs
#	Line 4242 | Line 4427 | public class CompletableFutureTest exten
4427		assertTrue(CompletableFuture.allOf(fs).cancel(false));
4428		}
4429
4430	+	/**
4431	+	* Checks for garbage retention when a dependent future is
4432	+	* cancelled and garbage-collected.
4433	+	* 8161600: Garbage retention when source CompletableFutures are never completed
4434	+	*
4435	+	* As of 2016-07, fails with OOME:
4436	+	* ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledGarbageRetention tck
4437	+	*/
4438	+	public void testCancelledGarbageRetention() throws Throwable {
4439	+	final int n = expensiveTests ? 100_000 : 10;
4440	+	CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4441	+	for (int i = 0; i < n; i++)
4442	+	assertTrue(neverCompleted.thenRun(() -> {}).cancel(true));
4443	+	}
4444	+
4445	+	/**
4446	+	* Checks for garbage retention when MinimalStage.toCompletableFuture()
4447	+	* is invoked many times.
4448	+	* 8161600: Garbage retention when source CompletableFutures are never completed
4449	+	*
4450	+	* As of 2016-07, fails with OOME:
4451	+	* ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testToCompletableFutureGarbageRetention tck
4452	+	*/
4453	+	public void testToCompletableFutureGarbageRetention() throws Throwable {
4454	+	final int n = expensiveTests ? 900_000 : 10;
4455	+	CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4456	+	CompletionStage minimal = neverCompleted.minimalCompletionStage();
4457	+	for (int i = 0; i < n; i++)
4458	+	assertTrue(minimal.toCompletableFuture().cancel(true));
4459	+	}
4460	+
4461		//     static <U> U join(CompletionStage<U> stage) {
4462		//         CompletableFuture<U> f = new CompletableFuture<>();
4463		//         stage.whenComplete((v, ex) -> {

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