ViewVC Help

View File | Revision Log | Show Annotations | Download File | Root Listing

root/jsr166/jsr166/src/test/tck/CompletableFutureTest.java

Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.159 by jsr166, Mon Jun 27 21:39:37 2016 UTC vs.
Revision 1.173 by jsr166, Wed Sep 21 06:03:17 2016 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 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 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 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 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 3851 | Line 3851 | public class CompletableFutureTest exten
3851		final CompletableFuture<Integer> v42 = CompletableFuture.completedFuture(42);
3852		final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3853
3854	+	final Runnable noopRunnable = new Noop(m);
3855	+	final Consumer<Integer> noopConsumer = new NoopConsumer(m);
3856	+	final Function<Integer, Integer> incFunction = new IncFunction(m);
3857	+
3858		List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> funs
3859		= new ArrayList<>();
3860
3861	<	funs.add((y) -> m.thenRun(y, new Noop(m)));
3862	<	funs.add((y) -> m.thenAccept(y, new NoopConsumer(m)));
3863	<	funs.add((y) -> m.thenApply(y, new IncFunction(m)));
3864	<
3865	<	funs.add((y) -> m.runAfterEither(y, incomplete, new Noop(m)));
3866	<	funs.add((y) -> m.acceptEither(y, incomplete, new NoopConsumer(m)));
3867	<	funs.add((y) -> m.applyToEither(y, incomplete, new IncFunction(m)));
3861	>	funs.add((y) -> m.thenRun(y, noopRunnable));
3862	>	funs.add((y) -> m.thenAccept(y, noopConsumer));
3863	>	funs.add((y) -> m.thenApply(y, incFunction));
3864	>
3865	>	funs.add((y) -> m.runAfterEither(y, incomplete, noopRunnable));
3866	>	funs.add((y) -> m.acceptEither(y, incomplete, noopConsumer));
3867	>	funs.add((y) -> m.applyToEither(y, incomplete, incFunction));
3868
3869	<	funs.add((y) -> m.runAfterBoth(y, v42, new Noop(m)));
3870	<	funs.add((y) -> m.runAfterBoth(v42, y, new Noop(m)));
3869	>	funs.add((y) -> m.runAfterBoth(y, v42, noopRunnable));
3870	>	funs.add((y) -> m.runAfterBoth(v42, y, noopRunnable));
3871		funs.add((y) -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3872		funs.add((y) -> m.thenAcceptBoth(v42, y, new SubtractAction(m)));
3873		funs.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m)));
#	Line 3873 | Line 3877 | public class CompletableFutureTest exten
3877
3878		funs.add((y) -> m.thenCompose(y, new CompletableFutureInc(m)));
3879
3880	<	funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y}));
3881	<	funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y, v42}));
3882	<	funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {v42, y}));
3883	<	funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y}));
3884	<	funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y, incomplete}));
3885	<	funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {incomplete, y}));
3880	>	funs.add((y) -> CompletableFuture.allOf(y));
3881	>	funs.add((y) -> CompletableFuture.allOf(y, v42));
3882	>	funs.add((y) -> CompletableFuture.allOf(v42, y));
3883	>	funs.add((y) -> CompletableFuture.anyOf(y));
3884	>	funs.add((y) -> CompletableFuture.anyOf(y, incomplete));
3885	>	funs.add((y) -> CompletableFuture.anyOf(incomplete, y));
3886
3887		for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3888		fun : funs) {
3889		CompletableFuture<Integer> f = new CompletableFuture<>();
3890		f.completeExceptionally(ex);
3891	<	CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3891	>	CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3892		checkCompletedWithWrappedException(src, ex);
3893		CompletableFuture<?> dep = fun.apply(src);
3894		checkCompletedWithWrappedException(dep, ex);
#	Line 3894 | Line 3898 | public class CompletableFutureTest exten
3898		for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3899		fun : funs) {
3900		CompletableFuture<Integer> f = new CompletableFuture<>();
3901	<	CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3901	>	CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3902		CompletableFuture<?> dep = fun.apply(src);
3903		f.completeExceptionally(ex);
3904		checkCompletedWithWrappedException(src, ex);
#	Line 3908 | Line 3912 | public class CompletableFutureTest exten
3912		CompletableFuture<Integer> f = new CompletableFuture<>();
3913		f.cancel(mayInterruptIfRunning);
3914		checkCancelled(f);
3915	<	CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3915	>	CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3916		checkCompletedWithWrappedCancellationException(src);
3917		CompletableFuture<?> dep = fun.apply(src);
3918		checkCompletedWithWrappedCancellationException(dep);
#	Line 3919 | Line 3923 | public class CompletableFutureTest exten
3923		for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3924		fun : funs) {
3925		CompletableFuture<Integer> f = new CompletableFuture<>();
3926	<	CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3926	>	CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3927		CompletableFuture<?> dep = fun.apply(src);
3928		f.cancel(mayInterruptIfRunning);
3929		checkCancelled(f);
#	Line 3930 | Line 3934 | public class CompletableFutureTest exten
3934		}}
3935
3936		/**
3937	<	* Minimal completion stages throw UOE for all non-CompletionStage methods
3937	>	* Minimal completion stages throw UOE for most non-CompletionStage methods
3938		*/
3939		public void testMinimalCompletionStage_minimality() {
3940		if (!testImplementationDetails) return;
#	Line 3959 | Line 3963 | public class CompletableFutureTest exten
3963		.filter((method) -> !permittedMethodSignatures.contains(toSignature.apply(method)))
3964		.collect(Collectors.toList());
3965
3966	<	CompletionStage<Integer> minimalStage =
3966	>	List<CompletionStage<Integer>> stages = new ArrayList<>();
3967	>	CompletionStage<Integer> min =
3968		new CompletableFuture<Integer>().minimalCompletionStage();
3969	+	stages.add(min);
3970	+	stages.add(min.thenApply(x -> x));
3971	+	stages.add(CompletableFuture.completedStage(1));
3972	+	stages.add(CompletableFuture.failedStage(new CFException()));
3973
3974		List<Method> bugs = new ArrayList<>();
3975		for (Method method : allMethods) {
#	Line 3976 | Line 3985 | public class CompletableFutureTest exten
3985		else if (parameterTypes[i] == long.class)
3986		args[i] = 0L;
3987		}
3988	<	try {
3989	<	method.invoke(minimalStage, args);
3990	<	bugs.add(method);
3982	<	}
3983	<	catch (java.lang.reflect.InvocationTargetException expected) {
3984	<	if (! (expected.getCause() instanceof UnsupportedOperationException)) {
3988	>	for (CompletionStage<Integer> stage : stages) {
3989	>	try {
3990	>	method.invoke(stage, args);
3991		bugs.add(method);
3986	–	// expected.getCause().printStackTrace();
3992		}
3993	+	catch (java.lang.reflect.InvocationTargetException expected) {
3994	+	if (! (expected.getCause() instanceof UnsupportedOperationException)) {
3995	+	bugs.add(method);
3996	+	// expected.getCause().printStackTrace();
3997	+	}
3998	+	}
3999	+	catch (ReflectiveOperationException bad) { throw new Error(bad); }
4000		}
3989	–	catch (ReflectiveOperationException bad) { throw new Error(bad); }
4001		}
4002		if (!bugs.isEmpty())
4003	<	throw new Error("Methods did not throw UOE: " + bugs.toString());
4003	>	throw new Error("Methods did not throw UOE: " + bugs);
4004	>	}
4005	>
4006	>	/**
4007	>	* minimalStage.toCompletableFuture() gives mutable CompletableFuture
4008	>	*/
4009	>	public void testMinimalCompletionStage_toCompletableFuture_mutable() {
4010	>	for (Integer v1 : new Integer[] { 1, null })
4011	>	{
4012	>	CompletableFuture<Integer> f = new CompletableFuture<>();
4013	>	CompletionStage minimal = f.minimalCompletionStage();
4014	>	CompletableFuture<Integer> g = minimal.toCompletableFuture();
4015	>	g.complete(v1);
4016	>	checkCompletedNormally(g, v1);
4017	>	checkIncomplete(f);
4018	>	checkIncomplete(minimal.toCompletableFuture());
4019	>	}}
4020	>
4021	>	/**
4022	>	* minimalStage.toCompletableFuture().join() awaits completion
4023	>	*/
4024	>	public void testMinimalCompletionStage_toCompletableFuture_join() throws Exception {
4025	>	for (boolean createIncomplete : new boolean[] { true, false })
4026	>	for (Integer v1 : new Integer[] { 1, null })
4027	>	{
4028	>	CompletableFuture<Integer> f = new CompletableFuture<>();
4029	>	if (!createIncomplete) assertTrue(f.complete(v1));
4030	>	CompletionStage<Integer> minimal = f.minimalCompletionStage();
4031	>	if (createIncomplete) assertTrue(f.complete(v1));
4032	>	assertEquals(v1, minimal.toCompletableFuture().join());
4033	>	assertEquals(v1, minimal.toCompletableFuture().get());
4034	>	checkCompletedNormally(minimal.toCompletableFuture(), v1);
4035	>	}}
4036	>
4037	>	/** Demo utility method for external reliable toCompletableFuture */
4038	>	static <T> CompletableFuture<T> toCompletableFuture(CompletionStage<T> stage) {
4039	>	CompletableFuture<T> f = new CompletableFuture<>();
4040	>	stage.handle((T t, Throwable ex) -> {
4041	>	if (ex != null) f.completeExceptionally(ex);
4042	>	else f.complete(t);
4043	>	return null;
4044	>	});
4045	>	return f;
4046	>	}
4047	>
4048	>	/** Demo utility method to join a CompletionStage */
4049	>	static <T> T join(CompletionStage<T> stage) {
4050	>	return toCompletableFuture(stage).join();
4051		}
4052
4053	+	/**
4054	+	* Joining a minimal stage "by hand" works
4055	+	*/
4056	+	public void testMinimalCompletionStage_join_by_hand() {
4057	+	for (boolean createIncomplete : new boolean[] { true, false })
4058	+	for (Integer v1 : new Integer[] { 1, null })
4059	+	{
4060	+	CompletableFuture<Integer> f = new CompletableFuture<>();
4061	+	CompletionStage<Integer> minimal = f.minimalCompletionStage();
4062	+	CompletableFuture<Integer> g = new CompletableFuture<>();
4063	+	if (!createIncomplete) assertTrue(f.complete(v1));
4064	+	minimal.thenAccept((x) -> g.complete(x));
4065	+	if (createIncomplete) assertTrue(f.complete(v1));
4066	+	g.join();
4067	+	checkCompletedNormally(g, v1);
4068	+	checkCompletedNormally(f, v1);
4069	+	assertEquals(v1, join(minimal));
4070	+	}}
4071	+
4072		static class Monad {
4073		static class ZeroException extends RuntimeException {
4074		public ZeroException() { super("monadic zero"); }
#	Line 4138 | Line 4215 | public class CompletableFutureTest exten
4215		Monad.plus(godot, Monad.unit(5L)));
4216		}
4217
4218	+	/** Test long recursive chains of CompletableFutures with cascading completions */
4219	+	public void testRecursiveChains() throws Throwable {
4220	+	for (ExecutionMode m : ExecutionMode.values())
4221	+	for (boolean addDeadEnds : new boolean[] { true, false })
4222	+	{
4223	+	final int val = 42;
4224	+	final int n = expensiveTests ? 1_000 : 2;
4225	+	CompletableFuture<Integer> head = new CompletableFuture<>();
4226	+	CompletableFuture<Integer> tail = head;
4227	+	for (int i = 0; i < n; i++) {
4228	+	if (addDeadEnds) m.thenApply(tail, v -> v + 1);
4229	+	tail = m.thenApply(tail, v -> v + 1);
4230	+	if (addDeadEnds) m.applyToEither(tail, tail, v -> v + 1);
4231	+	tail = m.applyToEither(tail, tail, v -> v + 1);
4232	+	if (addDeadEnds) m.thenCombine(tail, tail, (v, w) -> v + 1);
4233	+	tail = m.thenCombine(tail, tail, (v, w) -> v + 1);
4234	+	}
4235	+	head.complete(val);
4236	+	assertEquals(val + 3 * n, (int) tail.join());
4237	+	}}
4238	+
4239		/**
4240		* A single CompletableFuture with many dependents.
4241		* A demo of scalability - runtime is O(n).
#	Line 4170 | Line 4268 | public class CompletableFutureTest exten
4268		assertEquals(5 * 3 * n, count.get());
4269		}
4270
4271	<	/** ant -Dvmoptions=-Xmx8m -Djsr166.tckTestClass=CompletableFutureTest tck */
4272	<	public void testCoCompletionGarbage() throws Throwable {
4271	>	/** ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest tck */
4272	>	public void testCoCompletionGarbageRetention() throws Throwable {
4273		final int n = expensiveTests ? 1_000_000 : 10;
4274		final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
4275		CompletableFuture<Integer> f;
#	Line 4212 | Line 4310 | public class CompletableFutureTest exten
4310		}
4311		}
4312
4313	<	/*
4314	<	* Tests below currently fail in stress mode due to memory retention.
4315	<	* ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest tck
4313	>	/**
4314	>	* Reproduction recipe for:
4315	>	* 8160402: Garbage retention with CompletableFuture.anyOf
4316	>	* 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
4317		*/
4219	–
4220	–	/** Checks for garbage retention with anyOf. */
4318		public void testAnyOfGarbageRetention() throws Throwable {
4319		for (Integer v : new Integer[] { 1, null })
4320		{
#	Line 4231 | Line 4328 | public class CompletableFutureTest exten
4328		checkCompletedNormally(CompletableFuture.anyOf(fs), v);
4329		}}
4330
4331	<	/** Checks for garbage retention with allOf. */
4331	>	/**
4332	>	* Checks for garbage retention with allOf.
4333	>	*
4334	>	* As of 2016-07, fails with OOME:
4335	>	* ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledAllOfGarbageRetention tck
4336	>	*/
4337		public void testCancelledAllOfGarbageRetention() throws Throwable {
4338		final int n = expensiveTests ? 100_000 : 10;
4339		CompletableFuture<Integer>[] fs
#	Line 4242 | Line 4344 | public class CompletableFutureTest exten
4344		assertTrue(CompletableFuture.allOf(fs).cancel(false));
4345		}
4346
4347	+	/**
4348	+	* Checks for garbage retention when a dependent future is
4349	+	* cancelled and garbage-collected.
4350	+	* 8161600: Garbage retention when source CompletableFutures are never completed
4351	+	*
4352	+	* As of 2016-07, fails with OOME:
4353	+	* ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledGarbageRetention tck
4354	+	*/
4355	+	public void testCancelledGarbageRetention() throws Throwable {
4356	+	final int n = expensiveTests ? 100_000 : 10;
4357	+	CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4358	+	for (int i = 0; i < n; i++)
4359	+	assertTrue(neverCompleted.thenRun(() -> {}).cancel(true));
4360	+	}
4361	+
4362		//     static <U> U join(CompletionStage<U> stage) {
4363		//         CompletableFuture<U> f = new CompletableFuture<>();
4364		//         stage.whenComplete((v, ex) -> {

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines