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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 1.186 by jsr166, Mon Jul 3 20:55:45 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 65 | Line 64 | public class CompletableFutureTest exten
64		assertNull(f.getNow(null));
65		} catch (Throwable fail) { threadUnexpectedException(fail); }
66		try {
67	<	f.get(0L, SECONDS);
67	>	f.get(randomExpiredTimeout(), randomTimeUnit());
68		shouldThrow();
69		}
70		catch (TimeoutException success) {}
#	Line 77 | Line 76 | public class CompletableFutureTest exten
76
77		try {
78		assertEquals(value, f.join());
80	–	} catch (Throwable fail) { threadUnexpectedException(fail); }
81	–	try {
79		assertEquals(value, f.getNow(null));
83	–	} catch (Throwable fail) { threadUnexpectedException(fail); }
84	–	try {
80		assertEquals(value, f.get());
81		} catch (Throwable fail) { threadUnexpectedException(fail); }
82		assertTrue(f.isDone());
#	Line 94 | Line 89 | public class CompletableFutureTest exten
89		* Returns the "raw" internal exceptional completion of f,
90		* without any additional wrapping with CompletionException.
91		*/
92	<	<U> Throwable exceptionalCompletion(CompletableFuture<U> f) {
93	<	// handle (and whenComplete) can distinguish between "direct"
94	<	// and "wrapped" exceptional completion
95	<	return f.handle((U u, Throwable t) -> t).join();
92	>	Throwable exceptionalCompletion(CompletableFuture<?> f) {
93	>	// handle (and whenComplete and exceptionally) can distinguish
94	>	// between "direct" and "wrapped" exceptional completion
95	>	return f.handle((u, t) -> t).join();
96		}
97
98		void checkCompletedExceptionally(CompletableFuture<?> f,
#	Line 148 | Line 143 | public class CompletableFutureTest exten
143
144		void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
145		checkCompletedExceptionally(f, true,
146	<	(t) -> assertTrue(t instanceof CFException));
146	>	t -> assertTrue(t instanceof CFException));
147		}
148
149		void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
150		checkCompletedExceptionally(f, true,
151	<	(t) -> assertTrue(t instanceof CancellationException));
151	>	t -> assertTrue(t instanceof CancellationException));
152		}
153
154		void checkCompletedWithTimeoutException(CompletableFuture<?> f) {
155		checkCompletedExceptionally(f, false,
156	<	(t) -> assertTrue(t instanceof TimeoutException));
156	>	t -> assertTrue(t instanceof TimeoutException));
157		}
158
159		void checkCompletedWithWrappedException(CompletableFuture<?> f,
160		Throwable ex) {
161	<	checkCompletedExceptionally(f, true, (t) -> assertSame(t, ex));
161	>	checkCompletedExceptionally(f, true, t -> assertSame(t, ex));
162		}
163
164		void checkCompletedExceptionally(CompletableFuture<?> f, Throwable ex) {
165	<	checkCompletedExceptionally(f, false, (t) -> assertSame(t, ex));
165	>	checkCompletedExceptionally(f, false, t -> assertSame(t, ex));
166		}
167
168		void checkCancelled(CompletableFuture<?> f) {
#	Line 362 | Line 357 | public class CompletableFutureTest exten
357		checkCompletedNormally(f, "test");
358		}
359
360	<	abstract class CheckedAction {
360	>	abstract static class CheckedAction {
361		int invocationCount = 0;
362		final ExecutionMode m;
363		CheckedAction(ExecutionMode m) { this.m = m; }
#	Line 374 | Line 369 | public class CompletableFutureTest exten
369		void assertInvoked() { assertEquals(1, invocationCount); }
370		}
371
372	<	abstract class CheckedIntegerAction extends CheckedAction {
372	>	abstract static class CheckedIntegerAction extends CheckedAction {
373		Integer value;
374		CheckedIntegerAction(ExecutionMode m) { super(m); }
375		void assertValue(Integer expected) {
#	Line 383 | Line 378 | public class CompletableFutureTest exten
378		}
379		}
380
381	<	class IntegerSupplier extends CheckedAction
381	>	static class IntegerSupplier extends CheckedAction
382		implements Supplier<Integer>
383		{
384		final Integer value;
#	Line 402 | Line 397 | public class CompletableFutureTest exten
397		return (x == null) ? null : x + 1;
398		}
399
400	<	class NoopConsumer extends CheckedIntegerAction
400	>	static class NoopConsumer extends CheckedIntegerAction
401		implements Consumer<Integer>
402		{
403		NoopConsumer(ExecutionMode m) { super(m); }
#	Line 412 | Line 407 | public class CompletableFutureTest exten
407		}
408		}
409
410	<	class IncFunction extends CheckedIntegerAction
410	>	static class IncFunction extends CheckedIntegerAction
411		implements Function<Integer,Integer>
412		{
413		IncFunction(ExecutionMode m) { super(m); }
#	Line 430 | Line 425 | public class CompletableFutureTest exten
425		- ((y == null) ? 99 : y.intValue());
426		}
427
428	<	class SubtractAction extends CheckedIntegerAction
428	>	static class SubtractAction extends CheckedIntegerAction
429		implements BiConsumer<Integer, Integer>
430		{
431		SubtractAction(ExecutionMode m) { super(m); }
#	Line 440 | Line 435 | public class CompletableFutureTest exten
435		}
436		}
437
438	<	class SubtractFunction extends CheckedIntegerAction
438	>	static class SubtractFunction extends CheckedIntegerAction
439		implements BiFunction<Integer, Integer, Integer>
440		{
441		SubtractFunction(ExecutionMode m) { super(m); }
#	Line 450 | Line 445 | public class CompletableFutureTest exten
445		}
446		}
447
448	<	class Noop extends CheckedAction implements Runnable {
448	>	static class Noop extends CheckedAction implements Runnable {
449		Noop(ExecutionMode m) { super(m); }
450		public void run() {
451		invoked();
452		}
453		}
454
455	<	class FailingSupplier extends CheckedAction
455	>	static class FailingSupplier extends CheckedAction
456		implements Supplier<Integer>
457		{
458		final CFException ex;
#	Line 468 | Line 463 | public class CompletableFutureTest exten
463		}
464		}
465
466	<	class FailingConsumer extends CheckedIntegerAction
466	>	static class FailingConsumer extends CheckedIntegerAction
467		implements Consumer<Integer>
468		{
469		final CFException ex;
#	Line 480 | Line 475 | public class CompletableFutureTest exten
475		}
476		}
477
478	<	class FailingBiConsumer extends CheckedIntegerAction
478	>	static class FailingBiConsumer extends CheckedIntegerAction
479		implements BiConsumer<Integer, Integer>
480		{
481		final CFException ex;
#	Line 492 | Line 487 | public class CompletableFutureTest exten
487		}
488		}
489
490	<	class FailingFunction extends CheckedIntegerAction
490	>	static class FailingFunction extends CheckedIntegerAction
491		implements Function<Integer, Integer>
492		{
493		final CFException ex;
#	Line 504 | Line 499 | public class CompletableFutureTest exten
499		}
500		}
501
502	<	class FailingBiFunction extends CheckedIntegerAction
502	>	static class FailingBiFunction extends CheckedIntegerAction
503		implements BiFunction<Integer, Integer, Integer>
504		{
505		final CFException ex;
#	Line 516 | Line 511 | public class CompletableFutureTest exten
511		}
512		}
513
514	<	class FailingRunnable extends CheckedAction implements Runnable {
514	>	static class FailingRunnable extends CheckedAction implements Runnable {
515		final CFException ex;
516		FailingRunnable(ExecutionMode m) { super(m); ex = new CFException(); }
517		public void run() {
#	Line 525 | Line 520 | public class CompletableFutureTest exten
520		}
521		}
522
523	<	class CompletableFutureInc extends CheckedIntegerAction
523	>	static class CompletableFutureInc extends CheckedIntegerAction
524		implements Function<Integer, CompletableFuture<Integer>>
525		{
526		CompletableFutureInc(ExecutionMode m) { super(m); }
#	Line 538 | Line 533 | public class CompletableFutureTest exten
533		}
534		}
535
536	<	class FailingCompletableFutureFunction extends CheckedIntegerAction
536	>	static class FailingCompletableFutureFunction extends CheckedIntegerAction
537		implements Function<Integer, CompletableFuture<Integer>>
538		{
539		final CFException ex;
#	Line 2563 | Line 2558 | public class CompletableFutureTest exten
2558
2559		// unspecified behavior - both source completions available
2560		try {
2561	<	assertEquals(null, h0.join());
2561	>	assertNull(h0.join());
2562		rs[0].assertValue(v1);
2563		} catch (CompletionException ok) {
2564		checkCompletedWithWrappedException(h0, ex);
2565		rs[0].assertNotInvoked();
2566		}
2567		try {
2568	<	assertEquals(null, h1.join());
2568	>	assertNull(h1.join());
2569		rs[1].assertValue(v1);
2570		} catch (CompletionException ok) {
2571		checkCompletedWithWrappedException(h1, ex);
2572		rs[1].assertNotInvoked();
2573		}
2574		try {
2575	<	assertEquals(null, h2.join());
2575	>	assertNull(h2.join());
2576		rs[2].assertValue(v1);
2577		} catch (CompletionException ok) {
2578		checkCompletedWithWrappedException(h2, ex);
2579		rs[2].assertNotInvoked();
2580		}
2581		try {
2582	<	assertEquals(null, h3.join());
2582	>	assertNull(h3.join());
2583		rs[3].assertValue(v1);
2584		} catch (CompletionException ok) {
2585		checkCompletedWithWrappedException(h3, ex);
#	Line 2700 | Line 2695 | public class CompletableFutureTest exten
2695		for (ExecutionMode m : ExecutionMode.values())
2696		for (Integer v1 : new Integer[] { 1, null })
2697		for (Integer v2 : new Integer[] { 2, null })
2698	+	for (boolean pushNop : new boolean[] { true, false })
2699		{
2700		final CompletableFuture<Integer> f = new CompletableFuture<>();
2701		final CompletableFuture<Integer> g = new CompletableFuture<>();
#	Line 2712 | Line 2708 | public class CompletableFutureTest exten
2708		checkIncomplete(h1);
2709		rs[0].assertNotInvoked();
2710		rs[1].assertNotInvoked();
2711	+	if (pushNop) {          // ad hoc test of intra-completion interference
2712	+	m.thenRun(f, () -> {});
2713	+	m.thenRun(g, () -> {});
2714	+	}
2715		f.complete(v1);
2716		checkCompletedNormally(h0, null);
2717		checkCompletedNormally(h1, null);
#	Line 2818 | Line 2818 | public class CompletableFutureTest exten
2818
2819		// unspecified behavior - both source completions available
2820		try {
2821	<	assertEquals(null, h0.join());
2821	>	assertNull(h0.join());
2822		rs[0].assertInvoked();
2823		} catch (CompletionException ok) {
2824		checkCompletedWithWrappedException(h0, ex);
2825		rs[0].assertNotInvoked();
2826		}
2827		try {
2828	<	assertEquals(null, h1.join());
2828	>	assertNull(h1.join());
2829		rs[1].assertInvoked();
2830		} catch (CompletionException ok) {
2831		checkCompletedWithWrappedException(h1, ex);
2832		rs[1].assertNotInvoked();
2833		}
2834		try {
2835	<	assertEquals(null, h2.join());
2835	>	assertNull(h2.join());
2836		rs[2].assertInvoked();
2837		} catch (CompletionException ok) {
2838		checkCompletedWithWrappedException(h2, ex);
2839		rs[2].assertNotInvoked();
2840		}
2841		try {
2842	<	assertEquals(null, h3.join());
2842	>	assertNull(h3.join());
2843		rs[3].assertInvoked();
2844		} catch (CompletionException ok) {
2845		checkCompletedWithWrappedException(h3, ex);
#	Line 3234 | Line 3234 | public class CompletableFutureTest exten
3234		/**
3235		* Completion methods throw NullPointerException with null arguments
3236		*/
3237	+	@SuppressWarnings("FutureReturnValueIgnored")
3238		public void testNPE() {
3239		CompletableFuture<Integer> f = new CompletableFuture<>();
3240		CompletableFuture<Integer> g = new CompletableFuture<>();
#	Line 3253 | Line 3254 | public class CompletableFutureTest exten
3254
3255		() -> f.thenApply(null),
3256		() -> f.thenApplyAsync(null),
3257	<	() -> f.thenApplyAsync((x) -> x, null),
3257	>	() -> f.thenApplyAsync(x -> x, null),
3258		() -> f.thenApplyAsync(null, exec),
3259
3260		() -> f.thenAccept(null),
3261		() -> f.thenAcceptAsync(null),
3262	<	() -> f.thenAcceptAsync((x) -> {} , null),
3262	>	() -> f.thenAcceptAsync(x -> {} , null),
3263		() -> f.thenAcceptAsync(null, exec),
3264
3265		() -> f.thenRun(null),
#	Line 3293 | Line 3294 | public class CompletableFutureTest exten
3294		() -> f.applyToEither(g, null),
3295		() -> f.applyToEitherAsync(g, null),
3296		() -> f.applyToEitherAsync(g, null, exec),
3297	<	() -> f.applyToEither(nullFuture, (x) -> x),
3298	<	() -> f.applyToEitherAsync(nullFuture, (x) -> x),
3299	<	() -> f.applyToEitherAsync(nullFuture, (x) -> x, exec),
3300	<	() -> f.applyToEitherAsync(g, (x) -> x, null),
3297	>	() -> f.applyToEither(nullFuture, x -> x),
3298	>	() -> f.applyToEitherAsync(nullFuture, x -> x),
3299	>	() -> f.applyToEitherAsync(nullFuture, x -> x, exec),
3300	>	() -> f.applyToEitherAsync(g, x -> x, null),
3301
3302		() -> f.acceptEither(g, null),
3303		() -> f.acceptEitherAsync(g, null),
3304		() -> f.acceptEitherAsync(g, null, exec),
3305	<	() -> f.acceptEither(nullFuture, (x) -> {}),
3306	<	() -> f.acceptEitherAsync(nullFuture, (x) -> {}),
3307	<	() -> f.acceptEitherAsync(nullFuture, (x) -> {}, exec),
3308	<	() -> f.acceptEitherAsync(g, (x) -> {}, null),
3305	>	() -> f.acceptEither(nullFuture, x -> {}),
3306	>	() -> f.acceptEitherAsync(nullFuture, x -> {}),
3307	>	() -> f.acceptEitherAsync(nullFuture, x -> {}, exec),
3308	>	() -> f.acceptEitherAsync(g, x -> {}, null),
3309
3310		() -> f.runAfterEither(g, null),
3311		() -> f.runAfterEitherAsync(g, null),
#	Line 3354 | Line 3355 | public class CompletableFutureTest exten
3355		* Test submissions to an executor that rejects all tasks.
3356		*/
3357		public void testRejectingExecutor() {
3358	<	for (Integer v : new Integer[] { 1, null }) {
3359	<
3358	>	for (Integer v : new Integer[] { 1, null })
3359	>	{
3360		final CountingRejectingExecutor e = new CountingRejectingExecutor();
3361
3362		final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
#	Line 3370 | Line 3371 | public class CompletableFutureTest exten
3371		for (CompletableFuture<Integer> src : srcs) {
3372		List<CompletableFuture<?>> fs = new ArrayList<>();
3373		fs.add(src.thenRunAsync(() -> {}, e));
3374	<	fs.add(src.thenAcceptAsync((z) -> {}, e));
3375	<	fs.add(src.thenApplyAsync((z) -> z, e));
3374	>	fs.add(src.thenAcceptAsync(z -> {}, e));
3375	>	fs.add(src.thenApplyAsync(z -> z, e));
3376
3377		fs.add(src.thenCombineAsync(src, (x, y) -> x, e));
3378		fs.add(src.thenAcceptBothAsync(src, (x, y) -> {}, e));
3379		fs.add(src.runAfterBothAsync(src, () -> {}, e));
3380
3381	<	fs.add(src.applyToEitherAsync(src, (z) -> z, e));
3382	<	fs.add(src.acceptEitherAsync(src, (z) -> {}, e));
3381	>	fs.add(src.applyToEitherAsync(src, z -> z, e));
3382	>	fs.add(src.acceptEitherAsync(src, z -> {}, e));
3383		fs.add(src.runAfterEitherAsync(src, () -> {}, e));
3384
3385	<	fs.add(src.thenComposeAsync((z) -> null, e));
3385	>	fs.add(src.thenComposeAsync(z -> null, e));
3386		fs.add(src.whenCompleteAsync((z, t) -> {}, e));
3387		fs.add(src.handleAsync((z, t) -> null, e));
3388
#	Line 3414 | Line 3415 | public class CompletableFutureTest exten
3415		{
3416		List<CompletableFuture<?>> fs = new ArrayList<>();
3417
3418	<	fs.add(complete.applyToEitherAsync(incomplete, (z) -> z, e));
3419	<	fs.add(incomplete.applyToEitherAsync(complete, (z) -> z, e));
3418	>	fs.add(complete.applyToEitherAsync(incomplete, z -> z, e));
3419	>	fs.add(incomplete.applyToEitherAsync(complete, z -> z, e));
3420
3421	<	fs.add(complete.acceptEitherAsync(incomplete, (z) -> {}, e));
3422	<	fs.add(incomplete.acceptEitherAsync(complete, (z) -> {}, e));
3421	>	fs.add(complete.acceptEitherAsync(incomplete, z -> {}, e));
3422	>	fs.add(incomplete.acceptEitherAsync(complete, z -> {}, e));
3423
3424		fs.add(complete.runAfterEitherAsync(incomplete, () -> {}, e));
3425		fs.add(incomplete.runAfterEitherAsync(complete, () -> {}, e));
#	Line 3434 | Line 3435 | public class CompletableFutureTest exten
3435		checkCompletedWithWrappedException(future, e.ex);
3436
3437		assertEquals(futures.size(), e.count.get());
3438	<
3438	<	}
3439	<	}
3438	>	}}
3439
3440		/**
3441		* Test submissions to an executor that rejects all tasks, but
#	Line 3444 | Line 3443 | public class CompletableFutureTest exten
3443		* explicitly completed.
3444		*/
3445		public void testRejectingExecutorNeverInvoked() {
3446	+	for (Integer v : new Integer[] { 1, null })
3447	+	{
3448		final CountingRejectingExecutor e = new CountingRejectingExecutor();
3449
3449	–	for (Integer v : new Integer[] { 1, null }) {
3450	–
3450		final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3451		final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3452
#	Line 3459 | Line 3458 | public class CompletableFutureTest exten
3458
3459		List<CompletableFuture<?>> fs = new ArrayList<>();
3460		fs.add(incomplete.thenRunAsync(() -> {}, e));
3461	<	fs.add(incomplete.thenAcceptAsync((z) -> {}, e));
3462	<	fs.add(incomplete.thenApplyAsync((z) -> z, e));
3461	>	fs.add(incomplete.thenAcceptAsync(z -> {}, e));
3462	>	fs.add(incomplete.thenApplyAsync(z -> z, e));
3463
3464		fs.add(incomplete.thenCombineAsync(incomplete, (x, y) -> x, e));
3465		fs.add(incomplete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3466		fs.add(incomplete.runAfterBothAsync(incomplete, () -> {}, e));
3467
3468	<	fs.add(incomplete.applyToEitherAsync(incomplete, (z) -> z, e));
3469	<	fs.add(incomplete.acceptEitherAsync(incomplete, (z) -> {}, e));
3468	>	fs.add(incomplete.applyToEitherAsync(incomplete, z -> z, e));
3469	>	fs.add(incomplete.acceptEitherAsync(incomplete, z -> {}, e));
3470		fs.add(incomplete.runAfterEitherAsync(incomplete, () -> {}, e));
3471
3472	<	fs.add(incomplete.thenComposeAsync((z) -> null, e));
3472	>	fs.add(incomplete.thenComposeAsync(z -> null, e));
3473		fs.add(incomplete.whenCompleteAsync((z, t) -> {}, e));
3474		fs.add(incomplete.handleAsync((z, t) -> null, e));
3475
#	Line 3495 | Line 3494 | public class CompletableFutureTest exten
3494		checkCompletedNormally(future, null);
3495
3496		assertEquals(0, e.count.get());
3497	<
3499	<	}
3500	<	}
3497	>	}}
3498
3499		/**
3500		* toCompletableFuture returns this CompletableFuture.
#	Line 3532 | Line 3529 | public class CompletableFutureTest exten
3529		*/
3530		public void testCompletedStage() {
3531		AtomicInteger x = new AtomicInteger(0);
3532	<	AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3532	>	AtomicReference<Throwable> r = new AtomicReference<>();
3533		CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3534		f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3535		assertEquals(x.get(), 1);
#	Line 3577 | Line 3574 | public class CompletableFutureTest exten
3574		* copy returns a CompletableFuture that is completed normally,
3575		* with the same value, when source is.
3576		*/
3577	<	public void testCopy() {
3577	>	public void testCopy_normalCompletion() {
3578	>	for (boolean createIncomplete : new boolean[] { true, false })
3579	>	for (Integer v1 : new Integer[] { 1, null })
3580	>	{
3581		CompletableFuture<Integer> f = new CompletableFuture<>();
3582	+	if (!createIncomplete) assertTrue(f.complete(v1));
3583		CompletableFuture<Integer> g = f.copy();
3584	<	checkIncomplete(f);
3585	<	checkIncomplete(g);
3586	<	f.complete(1);
3587	<	checkCompletedNormally(f, 1);
3588	<	checkCompletedNormally(g, 1);
3589	<	}
3584	>	if (createIncomplete) {
3585	>	checkIncomplete(f);
3586	>	checkIncomplete(g);
3587	>	assertTrue(f.complete(v1));
3588	>	}
3589	>	checkCompletedNormally(f, v1);
3590	>	checkCompletedNormally(g, v1);
3591	>	}}
3592
3593		/**
3594		* copy returns a CompletableFuture that is completed exceptionally
3595		* when source is.
3596		*/
3597	<	public void testCopy2() {
3597	>	public void testCopy_exceptionalCompletion() {
3598	>	for (boolean createIncomplete : new boolean[] { true, false })
3599	>	{
3600	>	CFException ex = new CFException();
3601		CompletableFuture<Integer> f = new CompletableFuture<>();
3602	+	if (!createIncomplete) f.completeExceptionally(ex);
3603		CompletableFuture<Integer> g = f.copy();
3604	<	checkIncomplete(f);
3605	<	checkIncomplete(g);
3606	<	CFException ex = new CFException();
3607	<	f.completeExceptionally(ex);
3604	>	if (createIncomplete) {
3605	>	checkIncomplete(f);
3606	>	checkIncomplete(g);
3607	>	f.completeExceptionally(ex);
3608	>	}
3609		checkCompletedExceptionally(f, ex);
3610		checkCompletedWithWrappedException(g, ex);
3611	+	}}
3612	+
3613	+	/**
3614	+	* Completion of a copy does not complete its source.
3615	+	*/
3616	+	public void testCopy_oneWayPropagation() {
3617	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3618	+	assertTrue(f.copy().complete(1));
3619	+	assertTrue(f.copy().complete(null));
3620	+	assertTrue(f.copy().cancel(true));
3621	+	assertTrue(f.copy().cancel(false));
3622	+	assertTrue(f.copy().completeExceptionally(new CFException()));
3623	+	checkIncomplete(f);
3624		}
3625
3626		/**
#	Line 3610 | Line 3631 | public class CompletableFutureTest exten
3631		CompletableFuture<Integer> f = new CompletableFuture<>();
3632		CompletionStage<Integer> g = f.minimalCompletionStage();
3633		AtomicInteger x = new AtomicInteger(0);
3634	<	AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3634	>	AtomicReference<Throwable> r = new AtomicReference<>();
3635		checkIncomplete(f);
3636		g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3637		f.complete(1);
#	Line 3627 | Line 3648 | public class CompletableFutureTest exten
3648		CompletableFuture<Integer> f = new CompletableFuture<>();
3649		CompletionStage<Integer> g = f.minimalCompletionStage();
3650		AtomicInteger x = new AtomicInteger(0);
3651	<	AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3651	>	AtomicReference<Throwable> r = new AtomicReference<>();
3652		g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3653		checkIncomplete(f);
3654		CFException ex = new CFException();
#	Line 3645 | Line 3666 | public class CompletableFutureTest exten
3666		CFException ex = new CFException();
3667		CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3668		AtomicInteger x = new AtomicInteger(0);
3669	<	AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3669	>	AtomicReference<Throwable> r = new AtomicReference<>();
3670		f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3671		assertEquals(x.get(), 0);
3672		assertEquals(r.get(), ex);
#	Line 3669 | Line 3690 | public class CompletableFutureTest exten
3690		public void testCompleteAsync2() {
3691		CompletableFuture<Integer> f = new CompletableFuture<>();
3692		CFException ex = new CFException();
3693	<	f.completeAsync(() -> {if (true) throw ex; return 1;});
3693	>	f.completeAsync(() -> { throw ex; });
3694		try {
3695		f.join();
3696		shouldThrow();
#	Line 3699 | Line 3720 | public class CompletableFutureTest exten
3720		CompletableFuture<Integer> f = new CompletableFuture<>();
3721		CFException ex = new CFException();
3722		ThreadExecutor executor = new ThreadExecutor();
3723	<	f.completeAsync(() -> {if (true) throw ex; return 1;}, executor);
3723	>	f.completeAsync(() -> { throw ex; }, executor);
3724		try {
3725		f.join();
3726		shouldThrow();
#	Line 3851 | Line 3872 | public class CompletableFutureTest exten
3872		final CompletableFuture<Integer> v42 = CompletableFuture.completedFuture(42);
3873		final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3874
3875	+	final Runnable noopRunnable = new Noop(m);
3876	+	final Consumer<Integer> noopConsumer = new NoopConsumer(m);
3877	+	final Function<Integer, Integer> incFunction = new IncFunction(m);
3878	+
3879		List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> funs
3880		= new ArrayList<>();
3881
3882	<	funs.add((y) -> m.thenRun(y, new Noop(m)));
3883	<	funs.add((y) -> m.thenAccept(y, new NoopConsumer(m)));
3884	<	funs.add((y) -> m.thenApply(y, new IncFunction(m)));
3885	<
3886	<	funs.add((y) -> m.runAfterEither(y, incomplete, new Noop(m)));
3887	<	funs.add((y) -> m.acceptEither(y, incomplete, new NoopConsumer(m)));
3888	<	funs.add((y) -> m.applyToEither(y, incomplete, new IncFunction(m)));
3889	<
3890	<	funs.add((y) -> m.runAfterBoth(y, v42, new Noop(m)));
3891	<	funs.add((y) -> m.runAfterBoth(v42, y, new Noop(m)));
3892	<	funs.add((y) -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3893	<	funs.add((y) -> m.thenAcceptBoth(v42, y, new SubtractAction(m)));
3894	<	funs.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m)));
3895	<	funs.add((y) -> m.thenCombine(v42, y, new SubtractFunction(m)));
3896	<
3897	<	funs.add((y) -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
3898	<
3899	<	funs.add((y) -> m.thenCompose(y, new CompletableFutureInc(m)));
3900	<
3901	<	funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y}));
3902	<	funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y, v42}));
3903	<	funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {v42, y}));
3904	<	funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y}));
3905	<	funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y, incomplete}));
3906	<	funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {incomplete, y}));
3882	>	funs.add(y -> m.thenRun(y, noopRunnable));
3883	>	funs.add(y -> m.thenAccept(y, noopConsumer));
3884	>	funs.add(y -> m.thenApply(y, incFunction));
3885	>
3886	>	funs.add(y -> m.runAfterEither(y, incomplete, noopRunnable));
3887	>	funs.add(y -> m.acceptEither(y, incomplete, noopConsumer));
3888	>	funs.add(y -> m.applyToEither(y, incomplete, incFunction));
3889	>
3890	>	funs.add(y -> m.runAfterBoth(y, v42, noopRunnable));
3891	>	funs.add(y -> m.runAfterBoth(v42, y, noopRunnable));
3892	>	funs.add(y -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3893	>	funs.add(y -> m.thenAcceptBoth(v42, y, new SubtractAction(m)));
3894	>	funs.add(y -> m.thenCombine(y, v42, new SubtractFunction(m)));
3895	>	funs.add(y -> m.thenCombine(v42, y, new SubtractFunction(m)));
3896	>
3897	>	funs.add(y -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
3898	>
3899	>	funs.add(y -> m.thenCompose(y, new CompletableFutureInc(m)));
3900	>
3901	>	funs.add(y -> CompletableFuture.allOf(y));
3902	>	funs.add(y -> CompletableFuture.allOf(y, v42));
3903	>	funs.add(y -> CompletableFuture.allOf(v42, y));
3904	>	funs.add(y -> CompletableFuture.anyOf(y));
3905	>	funs.add(y -> CompletableFuture.anyOf(y, incomplete));
3906	>	funs.add(y -> CompletableFuture.anyOf(incomplete, y));
3907
3908		for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3909		fun : funs) {
3910		CompletableFuture<Integer> f = new CompletableFuture<>();
3911		f.completeExceptionally(ex);
3912	<	CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3912	>	CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3913		checkCompletedWithWrappedException(src, ex);
3914		CompletableFuture<?> dep = fun.apply(src);
3915		checkCompletedWithWrappedException(dep, ex);
#	Line 3894 | Line 3919 | public class CompletableFutureTest exten
3919		for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3920		fun : funs) {
3921		CompletableFuture<Integer> f = new CompletableFuture<>();
3922	<	CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3922	>	CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3923		CompletableFuture<?> dep = fun.apply(src);
3924		f.completeExceptionally(ex);
3925		checkCompletedWithWrappedException(src, ex);
#	Line 3908 | Line 3933 | public class CompletableFutureTest exten
3933		CompletableFuture<Integer> f = new CompletableFuture<>();
3934		f.cancel(mayInterruptIfRunning);
3935		checkCancelled(f);
3936	<	CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3936	>	CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3937		checkCompletedWithWrappedCancellationException(src);
3938		CompletableFuture<?> dep = fun.apply(src);
3939		checkCompletedWithWrappedCancellationException(dep);
#	Line 3919 | Line 3944 | public class CompletableFutureTest exten
3944		for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3945		fun : funs) {
3946		CompletableFuture<Integer> f = new CompletableFuture<>();
3947	<	CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3947	>	CompletableFuture<Integer> src = m.thenApply(f, incFunction);
3948		CompletableFuture<?> dep = fun.apply(src);
3949		f.cancel(mayInterruptIfRunning);
3950		checkCancelled(f);
#	Line 3930 | Line 3955 | public class CompletableFutureTest exten
3955		}}
3956
3957		/**
3958	<	* Minimal completion stages throw UOE for all non-CompletionStage methods
3958	>	* Minimal completion stages throw UOE for most non-CompletionStage methods
3959		*/
3960		public void testMinimalCompletionStage_minimality() {
3961		if (!testImplementationDetails) return;
3962		Function<Method, String> toSignature =
3963	<	(method) -> method.getName() + Arrays.toString(method.getParameterTypes());
3963	>	method -> method.getName() + Arrays.toString(method.getParameterTypes());
3964		Predicate<Method> isNotStatic =
3965	<	(method) -> (method.getModifiers() & Modifier.STATIC) == 0;
3965	>	method -> (method.getModifiers() & Modifier.STATIC) == 0;
3966		List<Method> minimalMethods =
3967		Stream.of(Object.class, CompletionStage.class)
3968	<	.flatMap((klazz) -> Stream.of(klazz.getMethods()))
3968	>	.flatMap(klazz -> Stream.of(klazz.getMethods()))
3969		.filter(isNotStatic)
3970		.collect(Collectors.toList());
3971		// Methods from CompletableFuture permitted NOT to throw UOE
#	Line 3956 | Line 3981 | public class CompletableFutureTest exten
3981		.collect(Collectors.toSet());
3982		List<Method> allMethods = Stream.of(CompletableFuture.class.getMethods())
3983		.filter(isNotStatic)
3984	<	.filter((method) -> !permittedMethodSignatures.contains(toSignature.apply(method)))
3984	>	.filter(method -> !permittedMethodSignatures.contains(toSignature.apply(method)))
3985		.collect(Collectors.toList());
3986
3987	<	CompletionStage<Integer> minimalStage =
3987	>	List<CompletionStage<Integer>> stages = new ArrayList<>();
3988	>	CompletionStage<Integer> min =
3989		new CompletableFuture<Integer>().minimalCompletionStage();
3990	+	stages.add(min);
3991	+	stages.add(min.thenApply(x -> x));
3992	+	stages.add(CompletableFuture.completedStage(1));
3993	+	stages.add(CompletableFuture.failedStage(new CFException()));
3994
3995		List<Method> bugs = new ArrayList<>();
3996		for (Method method : allMethods) {
#	Line 3976 | Line 4006 | public class CompletableFutureTest exten
4006		else if (parameterTypes[i] == long.class)
4007		args[i] = 0L;
4008		}
4009	<	try {
4010	<	method.invoke(minimalStage, args);
4011	<	bugs.add(method);
3982	<	}
3983	<	catch (java.lang.reflect.InvocationTargetException expected) {
3984	<	if (! (expected.getCause() instanceof UnsupportedOperationException)) {
4009	>	for (CompletionStage<Integer> stage : stages) {
4010	>	try {
4011	>	method.invoke(stage, args);
4012		bugs.add(method);
3986	–	// expected.getCause().printStackTrace();
4013		}
4014	+	catch (java.lang.reflect.InvocationTargetException expected) {
4015	+	if (! (expected.getCause() instanceof UnsupportedOperationException)) {
4016	+	bugs.add(method);
4017	+	// expected.getCause().printStackTrace();
4018	+	}
4019	+	}
4020	+	catch (ReflectiveOperationException bad) { throw new Error(bad); }
4021		}
3989	–	catch (ReflectiveOperationException bad) { throw new Error(bad); }
4022		}
4023		if (!bugs.isEmpty())
4024	<	throw new Error("Methods did not throw UOE: " + bugs.toString());
4024	>	throw new Error("Methods did not throw UOE: " + bugs);
4025	>	}
4026	>
4027	>	/**
4028	>	* minimalStage.toCompletableFuture() returns a CompletableFuture that
4029	>	* is completed normally, with the same value, when source is.
4030	>	*/
4031	>	public void testMinimalCompletionStage_toCompletableFuture_normalCompletion() {
4032	>	for (boolean createIncomplete : new boolean[] { true, false })
4033	>	for (Integer v1 : new Integer[] { 1, null })
4034	>	{
4035	>	CompletableFuture<Integer> f = new CompletableFuture<>();
4036	>	CompletionStage<Integer> minimal = f.minimalCompletionStage();
4037	>	if (!createIncomplete) assertTrue(f.complete(v1));
4038	>	CompletableFuture<Integer> g = minimal.toCompletableFuture();
4039	>	if (createIncomplete) {
4040	>	checkIncomplete(f);
4041	>	checkIncomplete(g);
4042	>	assertTrue(f.complete(v1));
4043	>	}
4044	>	checkCompletedNormally(f, v1);
4045	>	checkCompletedNormally(g, v1);
4046	>	}}
4047	>
4048	>	/**
4049	>	* minimalStage.toCompletableFuture() returns a CompletableFuture that
4050	>	* is completed exceptionally when source is.
4051	>	*/
4052	>	public void testMinimalCompletionStage_toCompletableFuture_exceptionalCompletion() {
4053	>	for (boolean createIncomplete : new boolean[] { true, false })
4054	>	{
4055	>	CFException ex = new CFException();
4056	>	CompletableFuture<Integer> f = new CompletableFuture<>();
4057	>	CompletionStage<Integer> minimal = f.minimalCompletionStage();
4058	>	if (!createIncomplete) f.completeExceptionally(ex);
4059	>	CompletableFuture<Integer> g = minimal.toCompletableFuture();
4060	>	if (createIncomplete) {
4061	>	checkIncomplete(f);
4062	>	checkIncomplete(g);
4063	>	f.completeExceptionally(ex);
4064	>	}
4065	>	checkCompletedExceptionally(f, ex);
4066	>	checkCompletedWithWrappedException(g, ex);
4067	>	}}
4068	>
4069	>	/**
4070	>	* minimalStage.toCompletableFuture() gives mutable CompletableFuture
4071	>	*/
4072	>	public void testMinimalCompletionStage_toCompletableFuture_mutable() {
4073	>	for (Integer v1 : new Integer[] { 1, null })
4074	>	{
4075	>	CompletableFuture<Integer> f = new CompletableFuture<>();
4076	>	CompletionStage minimal = f.minimalCompletionStage();
4077	>	CompletableFuture<Integer> g = minimal.toCompletableFuture();
4078	>	assertTrue(g.complete(v1));
4079	>	checkCompletedNormally(g, v1);
4080	>	checkIncomplete(f);
4081	>	checkIncomplete(minimal.toCompletableFuture());
4082	>	}}
4083	>
4084	>	/**
4085	>	* minimalStage.toCompletableFuture().join() awaits completion
4086	>	*/
4087	>	public void testMinimalCompletionStage_toCompletableFuture_join() throws Exception {
4088	>	for (boolean createIncomplete : new boolean[] { true, false })
4089	>	for (Integer v1 : new Integer[] { 1, null })
4090	>	{
4091	>	CompletableFuture<Integer> f = new CompletableFuture<>();
4092	>	if (!createIncomplete) assertTrue(f.complete(v1));
4093	>	CompletionStage<Integer> minimal = f.minimalCompletionStage();
4094	>	if (createIncomplete) assertTrue(f.complete(v1));
4095	>	assertEquals(v1, minimal.toCompletableFuture().join());
4096	>	assertEquals(v1, minimal.toCompletableFuture().get());
4097	>	checkCompletedNormally(minimal.toCompletableFuture(), v1);
4098	>	}}
4099	>
4100	>	/**
4101	>	* Completion of a toCompletableFuture copy of a minimal stage
4102	>	* does not complete its source.
4103	>	*/
4104	>	public void testMinimalCompletionStage_toCompletableFuture_oneWayPropagation() {
4105	>	CompletableFuture<Integer> f = new CompletableFuture<>();
4106	>	CompletionStage<Integer> g = f.minimalCompletionStage();
4107	>	assertTrue(g.toCompletableFuture().complete(1));
4108	>	assertTrue(g.toCompletableFuture().complete(null));
4109	>	assertTrue(g.toCompletableFuture().cancel(true));
4110	>	assertTrue(g.toCompletableFuture().cancel(false));
4111	>	assertTrue(g.toCompletableFuture().completeExceptionally(new CFException()));
4112	>	checkIncomplete(g.toCompletableFuture());
4113	>	f.complete(1);
4114	>	checkCompletedNormally(g.toCompletableFuture(), 1);
4115	>	}
4116	>
4117	>	/** Demo utility method for external reliable toCompletableFuture */
4118	>	static <T> CompletableFuture<T> toCompletableFuture(CompletionStage<T> stage) {
4119	>	CompletableFuture<T> f = new CompletableFuture<>();
4120	>	stage.handle((T t, Throwable ex) -> {
4121	>	if (ex != null) f.completeExceptionally(ex);
4122	>	else f.complete(t);
4123	>	return null;
4124	>	});
4125	>	return f;
4126	>	}
4127	>
4128	>	/** Demo utility method to join a CompletionStage */
4129	>	static <T> T join(CompletionStage<T> stage) {
4130	>	return toCompletableFuture(stage).join();
4131		}
4132
4133	+	/**
4134	+	* Joining a minimal stage "by hand" works
4135	+	*/
4136	+	public void testMinimalCompletionStage_join_by_hand() {
4137	+	for (boolean createIncomplete : new boolean[] { true, false })
4138	+	for (Integer v1 : new Integer[] { 1, null })
4139	+	{
4140	+	CompletableFuture<Integer> f = new CompletableFuture<>();
4141	+	CompletionStage<Integer> minimal = f.minimalCompletionStage();
4142	+	CompletableFuture<Integer> g = new CompletableFuture<>();
4143	+	if (!createIncomplete) assertTrue(f.complete(v1));
4144	+	minimal.thenAccept(x -> g.complete(x));
4145	+	if (createIncomplete) assertTrue(f.complete(v1));
4146	+	g.join();
4147	+	checkCompletedNormally(g, v1);
4148	+	checkCompletedNormally(f, v1);
4149	+	assertEquals(v1, join(minimal));
4150	+	}}
4151	+
4152		static class Monad {
4153		static class ZeroException extends RuntimeException {
4154		public ZeroException() { super("monadic zero"); }
#	Line 4008 | Line 4165 | public class CompletableFutureTest exten
4165		static <T,U,V> Function<T, CompletableFuture<V>> compose
4166		(Function<T, CompletableFuture<U>> f,
4167		Function<U, CompletableFuture<V>> g) {
4168	<	return (x) -> f.apply(x).thenCompose(g);
4168	>	return x -> f.apply(x).thenCompose(g);
4169		}
4170
4171		static void assertZero(CompletableFuture<?> f) {
#	Line 4088 | Line 4245 | public class CompletableFutureTest exten
4245
4246		// Some mutually non-commutative functions
4247		Function<Long, CompletableFuture<Long>> triple
4248	<	= (x) -> Monad.unit(3 * x);
4248	>	= x -> Monad.unit(3 * x);
4249		Function<Long, CompletableFuture<Long>> inc
4250	<	= (x) -> Monad.unit(x + 1);
4250	>	= x -> Monad.unit(x + 1);
4251
4252		// unit is a right identity: m >>= unit === m
4253		Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
#	Line 4102 | Line 4259 | public class CompletableFutureTest exten
4259		// associativity: (m >>= f) >>= g === m >>= ( \x -> (f x >>= g) )
4260		Monad.assertFutureEquals(
4261		unit.apply(5L).thenCompose(inc).thenCompose(triple),
4262	<	unit.apply(5L).thenCompose((x) -> inc.apply(x).thenCompose(triple)));
4262	>	unit.apply(5L).thenCompose(x -> inc.apply(x).thenCompose(triple)));
4263
4264		// The case for CompletableFuture as an additive monad is weaker...
4265
#	Line 4112 | Line 4269 | public class CompletableFutureTest exten
4269		// left zero: zero >>= f === zero
4270		Monad.assertZero(zero.thenCompose(inc));
4271		// right zero: f >>= (\x -> zero) === zero
4272	<	Monad.assertZero(inc.apply(5L).thenCompose((x) -> zero));
4272	>	Monad.assertZero(inc.apply(5L).thenCompose(x -> zero));
4273
4274		// f plus zero === f
4275		Monad.assertFutureEquals(Monad.unit(5L),
#	Line 4138 | Line 4295 | public class CompletableFutureTest exten
4295		Monad.plus(godot, Monad.unit(5L)));
4296		}
4297
4298	+	/** Test long recursive chains of CompletableFutures with cascading completions */
4299	+	public void testRecursiveChains() throws Throwable {
4300	+	for (ExecutionMode m : ExecutionMode.values())
4301	+	for (boolean addDeadEnds : new boolean[] { true, false })
4302	+	{
4303	+	final int val = 42;
4304	+	final int n = expensiveTests ? 1_000 : 2;
4305	+	CompletableFuture<Integer> head = new CompletableFuture<>();
4306	+	CompletableFuture<Integer> tail = head;
4307	+	for (int i = 0; i < n; i++) {
4308	+	if (addDeadEnds) m.thenApply(tail, v -> v + 1);
4309	+	tail = m.thenApply(tail, v -> v + 1);
4310	+	if (addDeadEnds) m.applyToEither(tail, tail, v -> v + 1);
4311	+	tail = m.applyToEither(tail, tail, v -> v + 1);
4312	+	if (addDeadEnds) m.thenCombine(tail, tail, (v, w) -> v + 1);
4313	+	tail = m.thenCombine(tail, tail, (v, w) -> v + 1);
4314	+	}
4315	+	head.complete(val);
4316	+	assertEquals(val + 3 * n, (int) tail.join());
4317	+	}}
4318	+
4319		/**
4320		* A single CompletableFuture with many dependents.
4321		* A demo of scalability - runtime is O(n).
#	Line 4149 | Line 4327 | public class CompletableFutureTest exten
4327		final AtomicInteger count = new AtomicInteger(0);
4328		for (int i = 0; i < n; i++) {
4329		head.thenRun(() -> count.getAndIncrement());
4330	<	head.thenAccept((x) -> count.getAndIncrement());
4331	<	head.thenApply((x) -> count.getAndIncrement());
4330	>	head.thenAccept(x -> count.getAndIncrement());
4331	>	head.thenApply(x -> count.getAndIncrement());
4332
4333		head.runAfterBoth(complete, () -> count.getAndIncrement());
4334		head.thenAcceptBoth(complete, (x, y) -> count.getAndIncrement());
#	Line 4160 | Line 4338 | public class CompletableFutureTest exten
4338		complete.thenCombine(head, (x, y) -> count.getAndIncrement());
4339
4340		head.runAfterEither(new CompletableFuture<Void>(), () -> count.getAndIncrement());
4341	<	head.acceptEither(new CompletableFuture<Void>(), (x) -> count.getAndIncrement());
4342	<	head.applyToEither(new CompletableFuture<Void>(), (x) -> count.getAndIncrement());
4341	>	head.acceptEither(new CompletableFuture<Void>(), x -> count.getAndIncrement());
4342	>	head.applyToEither(new CompletableFuture<Void>(), x -> count.getAndIncrement());
4343		new CompletableFuture<Void>().runAfterEither(head, () -> count.getAndIncrement());
4344	<	new CompletableFuture<Void>().acceptEither(head, (x) -> count.getAndIncrement());
4345	<	new CompletableFuture<Void>().applyToEither(head, (x) -> count.getAndIncrement());
4344	>	new CompletableFuture<Void>().acceptEither(head, x -> count.getAndIncrement());
4345	>	new CompletableFuture<Void>().applyToEither(head, x -> count.getAndIncrement());
4346		}
4347		head.complete(null);
4348		assertEquals(5 * 3 * n, count.get());
4349		}
4350
4351	<	/** ant -Dvmoptions=-Xmx8m -Djsr166.tckTestClass=CompletableFutureTest tck */
4352	<	public void testCoCompletionGarbage() throws Throwable {
4351	>	/** ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest tck */
4352	>	public void testCoCompletionGarbageRetention() throws Throwable {
4353		final int n = expensiveTests ? 1_000_000 : 10;
4354		final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
4355		CompletableFuture<Integer> f;
#	Line 4181 | Line 4359 | public class CompletableFutureTest exten
4359		f.complete(null);
4360
4361		f = new CompletableFuture<>();
4362	<	f.acceptEither(incomplete, (x) -> {});
4362	>	f.acceptEither(incomplete, x -> {});
4363		f.complete(null);
4364
4365		f = new CompletableFuture<>();
4366	<	f.applyToEither(incomplete, (x) -> x);
4366	>	f.applyToEither(incomplete, x -> x);
4367		f.complete(null);
4368
4369		f = new CompletableFuture<>();
#	Line 4199 | Line 4377 | public class CompletableFutureTest exten
4377		f.complete(null);
4378
4379		f = new CompletableFuture<>();
4380	<	incomplete.acceptEither(f, (x) -> {});
4380	>	incomplete.acceptEither(f, x -> {});
4381		f.complete(null);
4382
4383		f = new CompletableFuture<>();
4384	<	incomplete.applyToEither(f, (x) -> x);
4384	>	incomplete.applyToEither(f, x -> x);
4385		f.complete(null);
4386
4387		f = new CompletableFuture<>();
#	Line 4212 | Line 4390 | public class CompletableFutureTest exten
4390		}
4391		}
4392
4393	<	/*
4394	<	* Tests below currently fail in stress mode due to memory retention.
4395	<	* ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest tck
4393	>	/**
4394	>	* Reproduction recipe for:
4395	>	* 8160402: Garbage retention with CompletableFuture.anyOf
4396	>	* 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
4397		*/
4219	–
4220	–	/** Checks for garbage retention with anyOf. */
4398		public void testAnyOfGarbageRetention() throws Throwable {
4399		for (Integer v : new Integer[] { 1, null })
4400		{
#	Line 4231 | Line 4408 | public class CompletableFutureTest exten
4408		checkCompletedNormally(CompletableFuture.anyOf(fs), v);
4409		}}
4410
4411	<	/** Checks for garbage retention with allOf. */
4411	>	/**
4412	>	* Checks for garbage retention with allOf.
4413	>	*
4414	>	* As of 2016-07, fails with OOME:
4415	>	* ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledAllOfGarbageRetention tck
4416	>	*/
4417		public void testCancelledAllOfGarbageRetention() throws Throwable {
4418		final int n = expensiveTests ? 100_000 : 10;
4419		CompletableFuture<Integer>[] fs
#	Line 4242 | Line 4424 | public class CompletableFutureTest exten
4424		assertTrue(CompletableFuture.allOf(fs).cancel(false));
4425		}
4426
4427	+	/**
4428	+	* Checks for garbage retention when a dependent future is
4429	+	* cancelled and garbage-collected.
4430	+	* 8161600: Garbage retention when source CompletableFutures are never completed
4431	+	*
4432	+	* As of 2016-07, fails with OOME:
4433	+	* ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testCancelledGarbageRetention tck
4434	+	*/
4435	+	public void testCancelledGarbageRetention() throws Throwable {
4436	+	final int n = expensiveTests ? 100_000 : 10;
4437	+	CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4438	+	for (int i = 0; i < n; i++)
4439	+	assertTrue(neverCompleted.thenRun(() -> {}).cancel(true));
4440	+	}
4441	+
4442	+	/**
4443	+	* Checks for garbage retention when MinimalStage.toCompletableFuture()
4444	+	* is invoked many times.
4445	+	* 8161600: Garbage retention when source CompletableFutures are never completed
4446	+	*
4447	+	* As of 2016-07, fails with OOME:
4448	+	* ant -Dvmoptions=-Xmx8m -Djsr166.expensiveTests=true -Djsr166.tckTestClass=CompletableFutureTest -Djsr166.methodFilter=testToCompletableFutureGarbageRetention tck
4449	+	*/
4450	+	public void testToCompletableFutureGarbageRetention() throws Throwable {
4451	+	final int n = expensiveTests ? 900_000 : 10;
4452	+	CompletableFuture<Integer> neverCompleted = new CompletableFuture<>();
4453	+	CompletionStage minimal = neverCompleted.minimalCompletionStage();
4454	+	for (int i = 0; i < n; i++)
4455	+	assertTrue(minimal.toCompletableFuture().cancel(true));
4456	+	}
4457	+
4458		//     static <U> U join(CompletionStage<U> stage) {
4459		//         CompletableFuture<U> f = new CompletableFuture<>();
4460		//         stage.whenComplete((v, ex) -> {

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