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Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.125 by jsr166, Thu Sep 10 17:59:13 2015 UTC vs.
Revision 1.183 by jsr166, Wed Jan 4 06:09:58 2017 UTC

#	Line 7 | Line 7
7
8		import static java.util.concurrent.TimeUnit.MILLISECONDS;
9		import static java.util.concurrent.TimeUnit.SECONDS;
10	+	import static java.util.concurrent.CompletableFuture.completedFuture;
11	+	import static java.util.concurrent.CompletableFuture.failedFuture;
12
13		import java.lang.reflect.Method;
14		import java.lang.reflect.Modifier;
#	Line 28 | Line 30 | import java.util.concurrent.ExecutionExc
30		import java.util.concurrent.Executor;
31		import java.util.concurrent.ForkJoinPool;
32		import java.util.concurrent.ForkJoinTask;
33	+	import java.util.concurrent.RejectedExecutionException;
34		import java.util.concurrent.TimeoutException;
32	–	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 39 | Line 41 | import java.util.function.Function;
41		import java.util.function.Predicate;
42		import java.util.function.Supplier;
43
44	+	import junit.framework.AssertionFailedError;
45		import junit.framework.Test;
46		import junit.framework.TestSuite;
47
#	Line 90 | 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 144 | 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 358 | 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 370 | 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 379 | 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 398 | 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 408 | 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 426 | 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 436 | 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 446 | 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	<	FailingSupplier(ExecutionMode m) { super(m); }
462	>	final CFException ex;
463	>	FailingSupplier(ExecutionMode m) { super(m); ex = new CFException(); }
464		public Integer get() {
465		invoked();
466	<	throw new CFException();
466	>	throw ex;
467		}
468		}
469
470	<	class FailingConsumer extends CheckedIntegerAction
470	>	static class FailingConsumer extends CheckedIntegerAction
471		implements Consumer<Integer>
472		{
473	<	FailingConsumer(ExecutionMode m) { super(m); }
473	>	final CFException ex;
474	>	FailingConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
475		public void accept(Integer x) {
476		invoked();
477		value = x;
478	<	throw new CFException();
478	>	throw ex;
479		}
480		}
481
482	<	class FailingBiConsumer extends CheckedIntegerAction
482	>	static class FailingBiConsumer extends CheckedIntegerAction
483		implements BiConsumer<Integer, Integer>
484		{
485	<	FailingBiConsumer(ExecutionMode m) { super(m); }
485	>	final CFException ex;
486	>	FailingBiConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
487		public void accept(Integer x, Integer y) {
488		invoked();
489		value = subtract(x, y);
490	<	throw new CFException();
490	>	throw ex;
491		}
492		}
493
494	<	class FailingFunction extends CheckedIntegerAction
494	>	static class FailingFunction extends CheckedIntegerAction
495		implements Function<Integer, Integer>
496		{
497	<	FailingFunction(ExecutionMode m) { super(m); }
497	>	final CFException ex;
498	>	FailingFunction(ExecutionMode m) { super(m); ex = new CFException(); }
499		public Integer apply(Integer x) {
500		invoked();
501		value = x;
502	<	throw new CFException();
502	>	throw ex;
503		}
504		}
505
506	<	class FailingBiFunction extends CheckedIntegerAction
506	>	static class FailingBiFunction extends CheckedIntegerAction
507		implements BiFunction<Integer, Integer, Integer>
508		{
509	<	FailingBiFunction(ExecutionMode m) { super(m); }
509	>	final CFException ex;
510	>	FailingBiFunction(ExecutionMode m) { super(m); ex = new CFException(); }
511		public Integer apply(Integer x, Integer y) {
512		invoked();
513		value = subtract(x, y);
514	<	throw new CFException();
514	>	throw ex;
515		}
516		}
517
518	<	class FailingRunnable extends CheckedAction implements Runnable {
519	<	FailingRunnable(ExecutionMode m) { super(m); }
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() {
522		invoked();
523	<	throw new CFException();
523	>	throw ex;
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 528 | 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	<	FailingCompletableFutureFunction(ExecutionMode m) { super(m); }
543	>	final CFException ex;
544	>	FailingCompletableFutureFunction(ExecutionMode m) { super(m); ex = new CFException(); }
545		public CompletableFuture<Integer> apply(Integer x) {
546		invoked();
547		value = x;
548	<	throw new CFException();
548	>	throw ex;
549	>	}
550	>	}
551	>
552	>	static class CountingRejectingExecutor implements Executor {
553	>	final RejectedExecutionException ex = new RejectedExecutionException();
554	>	final AtomicInteger count = new AtomicInteger(0);
555	>	public void execute(Runnable r) {
556	>	count.getAndIncrement();
557	>	throw ex;
558		}
559		}
560
#	Line 837 | Line 856 | public class CompletableFutureTest exten
856		if (!createIncomplete) assertTrue(f.complete(v1));
857		final CompletableFuture<Integer> g = f.exceptionally
858		((Throwable t) -> {
840	–	// Should not be called
859		a.getAndIncrement();
860	<	throw new AssertionError();
860	>	threadFail("should not be called");
861	>	return null;            // unreached
862		});
863		if (createIncomplete) assertTrue(f.complete(v1));
864
#	Line 873 | Line 892 | public class CompletableFutureTest exten
892		assertEquals(1, a.get());
893		}}
894
895	+	/**
896	+	* If an "exceptionally action" throws an exception, it completes
897	+	* exceptionally with that exception
898	+	*/
899		public void testExceptionally_exceptionalCompletionActionFailed() {
900		for (boolean createIncomplete : new boolean[] { true, false })
901		{
#	Line 891 | Line 914 | public class CompletableFutureTest exten
914		if (createIncomplete) f.completeExceptionally(ex1);
915
916		checkCompletedWithWrappedException(g, ex2);
917	+	checkCompletedExceptionally(f, ex1);
918		assertEquals(1, a.get());
919		}}
920
#	Line 898 | Line 922 | public class CompletableFutureTest exten
922		* whenComplete action executes on normal completion, propagating
923		* source result.
924		*/
925	<	public void testWhenComplete_normalCompletion1() {
925	>	public void testWhenComplete_normalCompletion() {
926		for (ExecutionMode m : ExecutionMode.values())
927		for (boolean createIncomplete : new boolean[] { true, false })
928		for (Integer v1 : new Integer[] { 1, null })
#	Line 908 | Line 932 | public class CompletableFutureTest exten
932		if (!createIncomplete) assertTrue(f.complete(v1));
933		final CompletableFuture<Integer> g = m.whenComplete
934		(f,
935	<	(Integer x, Throwable t) -> {
935	>	(Integer result, Throwable t) -> {
936		m.checkExecutionMode();
937	<	threadAssertSame(x, v1);
937	>	threadAssertSame(result, v1);
938		threadAssertNull(t);
939		a.getAndIncrement();
940		});
#	Line 935 | Line 959 | public class CompletableFutureTest exten
959		if (!createIncomplete) f.completeExceptionally(ex);
960		final CompletableFuture<Integer> g = m.whenComplete
961		(f,
962	<	(Integer x, Throwable t) -> {
962	>	(Integer result, Throwable t) -> {
963		m.checkExecutionMode();
964	<	threadAssertNull(x);
964	>	threadAssertNull(result);
965		threadAssertSame(t, ex);
966		a.getAndIncrement();
967		});
#	Line 962 | Line 986 | public class CompletableFutureTest exten
986		if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
987		final CompletableFuture<Integer> g = m.whenComplete
988		(f,
989	<	(Integer x, Throwable t) -> {
989	>	(Integer result, Throwable t) -> {
990		m.checkExecutionMode();
991	<	threadAssertNull(x);
991	>	threadAssertNull(result);
992		threadAssertTrue(t instanceof CancellationException);
993		a.getAndIncrement();
994		});
#	Line 979 | Line 1003 | public class CompletableFutureTest exten
1003		* If a whenComplete action throws an exception when triggered by
1004		* a normal completion, it completes exceptionally
1005		*/
1006	<	public void testWhenComplete_actionFailed() {
1006	>	public void testWhenComplete_sourceCompletedNormallyActionFailed() {
1007		for (boolean createIncomplete : new boolean[] { true, false })
1008		for (ExecutionMode m : ExecutionMode.values())
1009		for (Integer v1 : new Integer[] { 1, null })
#	Line 990 | Line 1014 | public class CompletableFutureTest exten
1014		if (!createIncomplete) assertTrue(f.complete(v1));
1015		final CompletableFuture<Integer> g = m.whenComplete
1016		(f,
1017	<	(Integer x, Throwable t) -> {
1017	>	(Integer result, Throwable t) -> {
1018		m.checkExecutionMode();
1019	<	threadAssertSame(x, v1);
1019	>	threadAssertSame(result, v1);
1020		threadAssertNull(t);
1021		a.getAndIncrement();
1022		throw ex;
#	Line 1007 | Line 1031 | public class CompletableFutureTest exten
1031		/**
1032		* If a whenComplete action throws an exception when triggered by
1033		* a source completion that also throws an exception, the source
1034	<	* exception takes precedence.
1034	>	* exception takes precedence (unlike handle)
1035		*/
1036	<	public void testWhenComplete_actionFailedSourceFailed() {
1036	>	public void testWhenComplete_sourceFailedActionFailed() {
1037		for (boolean createIncomplete : new boolean[] { true, false })
1038		for (ExecutionMode m : ExecutionMode.values())
1039		{
#	Line 1021 | Line 1045 | public class CompletableFutureTest exten
1045		if (!createIncomplete) f.completeExceptionally(ex1);
1046		final CompletableFuture<Integer> g = m.whenComplete
1047		(f,
1048	<	(Integer x, Throwable t) -> {
1048	>	(Integer result, Throwable t) -> {
1049		m.checkExecutionMode();
1050		threadAssertSame(t, ex1);
1051	<	threadAssertNull(x);
1051	>	threadAssertNull(result);
1052		a.getAndIncrement();
1053		throw ex2;
1054		});
#	Line 1032 | Line 1056 | public class CompletableFutureTest exten
1056
1057		checkCompletedWithWrappedException(g, ex1);
1058		checkCompletedExceptionally(f, ex1);
1059	+	if (testImplementationDetails) {
1060	+	assertEquals(1, ex1.getSuppressed().length);
1061	+	assertSame(ex2, ex1.getSuppressed()[0]);
1062	+	}
1063		assertEquals(1, a.get());
1064		}}
1065
#	Line 1049 | Line 1077 | public class CompletableFutureTest exten
1077		if (!createIncomplete) assertTrue(f.complete(v1));
1078		final CompletableFuture<Integer> g = m.handle
1079		(f,
1080	<	(Integer x, Throwable t) -> {
1080	>	(Integer result, Throwable t) -> {
1081		m.checkExecutionMode();
1082	<	threadAssertSame(x, v1);
1082	>	threadAssertSame(result, v1);
1083		threadAssertNull(t);
1084		a.getAndIncrement();
1085		return inc(v1);
#	Line 1078 | Line 1106 | public class CompletableFutureTest exten
1106		if (!createIncomplete) f.completeExceptionally(ex);
1107		final CompletableFuture<Integer> g = m.handle
1108		(f,
1109	<	(Integer x, Throwable t) -> {
1109	>	(Integer result, Throwable t) -> {
1110		m.checkExecutionMode();
1111	<	threadAssertNull(x);
1111	>	threadAssertNull(result);
1112		threadAssertSame(t, ex);
1113		a.getAndIncrement();
1114		return v1;
#	Line 1107 | Line 1135 | public class CompletableFutureTest exten
1135		if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1136		final CompletableFuture<Integer> g = m.handle
1137		(f,
1138	<	(Integer x, Throwable t) -> {
1138	>	(Integer result, Throwable t) -> {
1139		m.checkExecutionMode();
1140	<	threadAssertNull(x);
1140	>	threadAssertNull(result);
1141		threadAssertTrue(t instanceof CancellationException);
1142		a.getAndIncrement();
1143		return v1;
#	Line 1122 | Line 1150 | public class CompletableFutureTest exten
1150		}}
1151
1152		/**
1153	<	* handle result completes exceptionally if action does
1153	>	* If a "handle action" throws an exception when triggered by
1154	>	* a normal completion, it completes exceptionally
1155		*/
1156	<	public void testHandle_sourceFailedActionFailed() {
1156	>	public void testHandle_sourceCompletedNormallyActionFailed() {
1157		for (ExecutionMode m : ExecutionMode.values())
1158		for (boolean createIncomplete : new boolean[] { true, false })
1159	+	for (Integer v1 : new Integer[] { 1, null })
1160		{
1161		final CompletableFuture<Integer> f = new CompletableFuture<>();
1162		final AtomicInteger a = new AtomicInteger(0);
1163	<	final CFException ex1 = new CFException();
1164	<	final CFException ex2 = new CFException();
1135	<	if (!createIncomplete) f.completeExceptionally(ex1);
1163	>	final CFException ex = new CFException();
1164	>	if (!createIncomplete) assertTrue(f.complete(v1));
1165		final CompletableFuture<Integer> g = m.handle
1166		(f,
1167	<	(Integer x, Throwable t) -> {
1167	>	(Integer result, Throwable t) -> {
1168		m.checkExecutionMode();
1169	<	threadAssertNull(x);
1170	<	threadAssertSame(ex1, t);
1169	>	threadAssertSame(result, v1);
1170	>	threadAssertNull(t);
1171		a.getAndIncrement();
1172	<	throw ex2;
1172	>	throw ex;
1173		});
1174	<	if (createIncomplete) f.completeExceptionally(ex1);
1174	>	if (createIncomplete) assertTrue(f.complete(v1));
1175
1176	<	checkCompletedWithWrappedException(g, ex2);
1177	<	checkCompletedExceptionally(f, ex1);
1176	>	checkCompletedWithWrappedException(g, ex);
1177	>	checkCompletedNormally(f, v1);
1178		assertEquals(1, a.get());
1179		}}
1180
1181	<	public void testHandle_sourceCompletedNormallyActionFailed() {
1182	<	for (ExecutionMode m : ExecutionMode.values())
1181	>	/**
1182	>	* If a "handle action" throws an exception when triggered by
1183	>	* a source completion that also throws an exception, the action
1184	>	* exception takes precedence (unlike whenComplete)
1185	>	*/
1186	>	public void testHandle_sourceFailedActionFailed() {
1187		for (boolean createIncomplete : new boolean[] { true, false })
1188	<	for (Integer v1 : new Integer[] { 1, null })
1188	>	for (ExecutionMode m : ExecutionMode.values())
1189		{
1157	–	final CompletableFuture<Integer> f = new CompletableFuture<>();
1190		final AtomicInteger a = new AtomicInteger(0);
1191	<	final CFException ex = new CFException();
1192	<	if (!createIncomplete) assertTrue(f.complete(v1));
1191	>	final CFException ex1 = new CFException();
1192	>	final CFException ex2 = new CFException();
1193	>	final CompletableFuture<Integer> f = new CompletableFuture<>();
1194	>
1195	>	if (!createIncomplete) f.completeExceptionally(ex1);
1196		final CompletableFuture<Integer> g = m.handle
1197		(f,
1198	<	(Integer x, Throwable t) -> {
1198	>	(Integer result, Throwable t) -> {
1199		m.checkExecutionMode();
1200	<	threadAssertSame(x, v1);
1201	<	threadAssertNull(t);
1200	>	threadAssertNull(result);
1201	>	threadAssertSame(ex1, t);
1202		a.getAndIncrement();
1203	<	throw ex;
1203	>	throw ex2;
1204		});
1205	<	if (createIncomplete) assertTrue(f.complete(v1));
1205	>	if (createIncomplete) f.completeExceptionally(ex1);
1206
1207	<	checkCompletedWithWrappedException(g, ex);
1208	<	checkCompletedNormally(f, v1);
1207	>	checkCompletedWithWrappedException(g, ex2);
1208	>	checkCompletedExceptionally(f, ex1);
1209		assertEquals(1, a.get());
1210		}}
1211
#	Line 1203 | Line 1238 | public class CompletableFutureTest exten
1238		{
1239		final FailingRunnable r = new FailingRunnable(m);
1240		final CompletableFuture<Void> f = m.runAsync(r);
1241	<	checkCompletedWithWrappedCFException(f);
1241	>	checkCompletedWithWrappedException(f, r.ex);
1242		r.assertInvoked();
1243		}}
1244
1245	+	public void testRunAsync_rejectingExecutor() {
1246	+	CountingRejectingExecutor e = new CountingRejectingExecutor();
1247	+	try {
1248	+	CompletableFuture.runAsync(() -> {}, e);
1249	+	shouldThrow();
1250	+	} catch (Throwable t) {
1251	+	assertSame(e.ex, t);
1252	+	}
1253	+
1254	+	assertEquals(1, e.count.get());
1255	+	}
1256	+
1257		/**
1258		* supplyAsync completes with result of supplier
1259		*/
#	Line 1237 | Line 1284 | public class CompletableFutureTest exten
1284		{
1285		FailingSupplier r = new FailingSupplier(m);
1286		CompletableFuture<Integer> f = m.supplyAsync(r);
1287	<	checkCompletedWithWrappedCFException(f);
1287	>	checkCompletedWithWrappedException(f, r.ex);
1288		r.assertInvoked();
1289		}}
1290
1291	+	public void testSupplyAsync_rejectingExecutor() {
1292	+	CountingRejectingExecutor e = new CountingRejectingExecutor();
1293	+	try {
1294	+	CompletableFuture.supplyAsync(() -> null, e);
1295	+	shouldThrow();
1296	+	} catch (Throwable t) {
1297	+	assertSame(e.ex, t);
1298	+	}
1299	+
1300	+	assertEquals(1, e.count.get());
1301	+	}
1302	+
1303		// seq completion methods
1304
1305		/**
#	Line 1359 | Line 1418 | public class CompletableFutureTest exten
1418		final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1419		final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1420
1421	<	checkCompletedWithWrappedCFException(h0);
1422	<	checkCompletedWithWrappedCFException(h1);
1423	<	checkCompletedWithWrappedCFException(h2);
1424	<	checkCompletedWithWrappedCFException(h3);
1425	<	checkCompletedWithWrappedCFException(h4);
1426	<	checkCompletedWithWrappedCFException(h5);
1421	>	checkCompletedWithWrappedException(h0, rs[0].ex);
1422	>	checkCompletedWithWrappedException(h1, rs[1].ex);
1423	>	checkCompletedWithWrappedException(h2, rs[2].ex);
1424	>	checkCompletedWithWrappedException(h3, rs[3].ex);
1425	>	checkCompletedWithWrappedException(h4, rs[4].ex);
1426	>	checkCompletedWithWrappedException(h5, rs[5].ex);
1427		checkCompletedNormally(f, v1);
1428		}}
1429
#	Line 1463 | Line 1522 | public class CompletableFutureTest exten
1522		final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1523		final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1524
1525	<	checkCompletedWithWrappedCFException(h0);
1526	<	checkCompletedWithWrappedCFException(h1);
1527	<	checkCompletedWithWrappedCFException(h2);
1528	<	checkCompletedWithWrappedCFException(h3);
1525	>	checkCompletedWithWrappedException(h0, rs[0].ex);
1526	>	checkCompletedWithWrappedException(h1, rs[1].ex);
1527	>	checkCompletedWithWrappedException(h2, rs[2].ex);
1528	>	checkCompletedWithWrappedException(h3, rs[3].ex);
1529		checkCompletedNormally(f, v1);
1530		}}
1531
#	Line 1565 | Line 1624 | public class CompletableFutureTest exten
1624		final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1625		final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1626
1627	<	checkCompletedWithWrappedCFException(h0);
1628	<	checkCompletedWithWrappedCFException(h1);
1629	<	checkCompletedWithWrappedCFException(h2);
1630	<	checkCompletedWithWrappedCFException(h3);
1627	>	checkCompletedWithWrappedException(h0, rs[0].ex);
1628	>	checkCompletedWithWrappedException(h1, rs[1].ex);
1629	>	checkCompletedWithWrappedException(h2, rs[2].ex);
1630	>	checkCompletedWithWrappedException(h3, rs[3].ex);
1631		checkCompletedNormally(f, v1);
1632		}}
1633
#	Line 1730 | Line 1789 | public class CompletableFutureTest exten
1789		assertTrue(snd.complete(w2));
1790		final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1791
1792	<	checkCompletedWithWrappedCFException(h1);
1793	<	checkCompletedWithWrappedCFException(h2);
1794	<	checkCompletedWithWrappedCFException(h3);
1792	>	checkCompletedWithWrappedException(h1, r1.ex);
1793	>	checkCompletedWithWrappedException(h2, r2.ex);
1794	>	checkCompletedWithWrappedException(h3, r3.ex);
1795		r1.assertInvoked();
1796		r2.assertInvoked();
1797		r3.assertInvoked();
#	Line 1894 | Line 1953 | public class CompletableFutureTest exten
1953		assertTrue(snd.complete(w2));
1954		final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1955
1956	<	checkCompletedWithWrappedCFException(h1);
1957	<	checkCompletedWithWrappedCFException(h2);
1958	<	checkCompletedWithWrappedCFException(h3);
1956	>	checkCompletedWithWrappedException(h1, r1.ex);
1957	>	checkCompletedWithWrappedException(h2, r2.ex);
1958	>	checkCompletedWithWrappedException(h3, r3.ex);
1959		r1.assertInvoked();
1960		r2.assertInvoked();
1961		r3.assertInvoked();
#	Line 2058 | Line 2117 | public class CompletableFutureTest exten
2117		assertTrue(snd.complete(w2));
2118		final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2119
2120	<	checkCompletedWithWrappedCFException(h1);
2121	<	checkCompletedWithWrappedCFException(h2);
2122	<	checkCompletedWithWrappedCFException(h3);
2120	>	checkCompletedWithWrappedException(h1, r1.ex);
2121	>	checkCompletedWithWrappedException(h2, r2.ex);
2122	>	checkCompletedWithWrappedException(h3, r3.ex);
2123		r1.assertInvoked();
2124		r2.assertInvoked();
2125		r3.assertInvoked();
#	Line 2350 | Line 2409 | public class CompletableFutureTest exten
2409		f.complete(v1);
2410		final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2411		final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2412	<	checkCompletedWithWrappedCFException(h0);
2413	<	checkCompletedWithWrappedCFException(h1);
2414	<	checkCompletedWithWrappedCFException(h2);
2415	<	checkCompletedWithWrappedCFException(h3);
2412	>	checkCompletedWithWrappedException(h0, rs[0].ex);
2413	>	checkCompletedWithWrappedException(h1, rs[1].ex);
2414	>	checkCompletedWithWrappedException(h2, rs[2].ex);
2415	>	checkCompletedWithWrappedException(h3, rs[3].ex);
2416		for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2417
2418		g.complete(v2);
#	Line 2362 | Line 2421 | public class CompletableFutureTest exten
2421		final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2422		final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2423
2424	<	checkCompletedWithWrappedCFException(h4);
2424	>	checkCompletedWithWrappedException(h4, rs[4].ex);
2425		assertTrue(Objects.equals(v1, rs[4].value) ||
2426		Objects.equals(v2, rs[4].value));
2427	<	checkCompletedWithWrappedCFException(h5);
2427	>	checkCompletedWithWrappedException(h5, rs[5].ex);
2428		assertTrue(Objects.equals(v1, rs[5].value) ||
2429		Objects.equals(v2, rs[5].value));
2430
#	Line 2609 | Line 2668 | public class CompletableFutureTest exten
2668		f.complete(v1);
2669		final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2670		final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2671	<	checkCompletedWithWrappedCFException(h0);
2672	<	checkCompletedWithWrappedCFException(h1);
2673	<	checkCompletedWithWrappedCFException(h2);
2674	<	checkCompletedWithWrappedCFException(h3);
2671	>	checkCompletedWithWrappedException(h0, rs[0].ex);
2672	>	checkCompletedWithWrappedException(h1, rs[1].ex);
2673	>	checkCompletedWithWrappedException(h2, rs[2].ex);
2674	>	checkCompletedWithWrappedException(h3, rs[3].ex);
2675		for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2676
2677		g.complete(v2);
#	Line 2621 | Line 2680 | public class CompletableFutureTest exten
2680		final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2681		final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2682
2683	<	checkCompletedWithWrappedCFException(h4);
2683	>	checkCompletedWithWrappedException(h4, rs[4].ex);
2684		assertTrue(Objects.equals(v1, rs[4].value) ||
2685		Objects.equals(v2, rs[4].value));
2686	<	checkCompletedWithWrappedCFException(h5);
2686	>	checkCompletedWithWrappedException(h5, rs[5].ex);
2687		assertTrue(Objects.equals(v1, rs[5].value) ||
2688		Objects.equals(v2, rs[5].value));
2689
#	Line 2640 | 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 2652 | 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 2864 | Line 2928 | public class CompletableFutureTest exten
2928		assertTrue(f.complete(v1));
2929		final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2930		final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2931	<	checkCompletedWithWrappedCFException(h0);
2932	<	checkCompletedWithWrappedCFException(h1);
2933	<	checkCompletedWithWrappedCFException(h2);
2934	<	checkCompletedWithWrappedCFException(h3);
2931	>	checkCompletedWithWrappedException(h0, rs[0].ex);
2932	>	checkCompletedWithWrappedException(h1, rs[1].ex);
2933	>	checkCompletedWithWrappedException(h2, rs[2].ex);
2934	>	checkCompletedWithWrappedException(h3, rs[3].ex);
2935		for (int i = 0; i < 4; i++) rs[i].assertInvoked();
2936		assertTrue(g.complete(v2));
2937		final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2938		final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2939	<	checkCompletedWithWrappedCFException(h4);
2940	<	checkCompletedWithWrappedCFException(h5);
2939	>	checkCompletedWithWrappedException(h4, rs[4].ex);
2940	>	checkCompletedWithWrappedException(h5, rs[5].ex);
2941
2942		checkCompletedNormally(f, v1);
2943		checkCompletedNormally(g, v2);
#	Line 2934 | Line 2998 | public class CompletableFutureTest exten
2998		final CompletableFuture<Integer> g = m.thenCompose(f, r);
2999		if (createIncomplete) assertTrue(f.complete(v1));
3000
3001	<	checkCompletedWithWrappedCFException(g);
3001	>	checkCompletedWithWrappedException(g, r.ex);
3002		checkCompletedNormally(f, v1);
3003		}}
3004
#	Line 3043 | Line 3107 | public class CompletableFutureTest exten
3107		}
3108		}
3109
3110	<	public void testAllOf_backwards() throws Exception {
3110	>	public void testAllOf_normal_backwards() throws Exception {
3111		for (int k = 1; k < 10; k++) {
3112		CompletableFuture<Integer>[] fs
3113		= (CompletableFuture<Integer>[]) new CompletableFuture[k];
#	Line 3193 | 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 3233 | 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 3276 | Line 3340 | public class CompletableFutureTest exten
3340		() -> f.obtrudeException(null),
3341
3342		() -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3343	<	() -> CompletableFuture.delayedExecutor(1L, null, new ThreadExecutor()),
3343	>	() -> CompletableFuture.delayedExecutor(1L, null, exec),
3344		() -> CompletableFuture.delayedExecutor(1L, null),
3345
3346		() -> f.orTimeout(1L, null),
#	Line 3291 | Line 3355 | public class CompletableFutureTest exten
3355		}
3356
3357		/**
3358	+	* Test submissions to an executor that rejects all tasks.
3359	+	*/
3360	+	public void testRejectingExecutor() {
3361	+	for (Integer v : new Integer[] { 1, null })
3362	+	{
3363	+	final CountingRejectingExecutor e = new CountingRejectingExecutor();
3364	+
3365	+	final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3366	+	final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3367	+
3368	+	List<CompletableFuture<?>> futures = new ArrayList<>();
3369	+
3370	+	List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3371	+	srcs.add(complete);
3372	+	srcs.add(incomplete);
3373	+
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));
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));
3386	+	fs.add(src.runAfterEitherAsync(src, () -> {}, e));
3387	+
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	+
3392	+	for (CompletableFuture<?> future : fs) {
3393	+	if (src.isDone())
3394	+	checkCompletedWithWrappedException(future, e.ex);
3395	+	else
3396	+	checkIncomplete(future);
3397	+	}
3398	+	futures.addAll(fs);
3399	+	}
3400	+
3401	+	{
3402	+	List<CompletableFuture<?>> fs = new ArrayList<>();
3403	+
3404	+	fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3405	+	fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3406	+
3407	+	fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3408	+	fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3409	+
3410	+	fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3411	+	fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3412	+
3413	+	for (CompletableFuture<?> future : fs)
3414	+	checkIncomplete(future);
3415	+	futures.addAll(fs);
3416	+	}
3417	+
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));
3423	+
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));
3429	+
3430	+	for (CompletableFuture<?> future : fs)
3431	+	checkCompletedWithWrappedException(future, e.ex);
3432	+	futures.addAll(fs);
3433	+	}
3434	+
3435	+	incomplete.complete(v);
3436	+
3437	+	for (CompletableFuture<?> future : futures)
3438	+	checkCompletedWithWrappedException(future, e.ex);
3439	+
3440	+	assertEquals(futures.size(), e.count.get());
3441	+	}}
3442	+
3443	+	/**
3444	+	* Test submissions to an executor that rejects all tasks, but
3445	+	* should never be invoked because the dependent future is
3446	+	* explicitly completed.
3447	+	*/
3448	+	public void testRejectingExecutorNeverInvoked() {
3449	+	for (Integer v : new Integer[] { 1, null })
3450	+	{
3451	+	final CountingRejectingExecutor e = new CountingRejectingExecutor();
3452	+
3453	+	final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3454	+	final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3455	+
3456	+	List<CompletableFuture<?>> futures = new ArrayList<>();
3457	+
3458	+	List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3459	+	srcs.add(complete);
3460	+	srcs.add(incomplete);
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));
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));
3473	+	fs.add(incomplete.runAfterEitherAsync(incomplete, () -> {}, e));
3474	+
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	+
3479	+	fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3480	+	fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3481	+
3482	+	fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3483	+	fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3484	+
3485	+	fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3486	+	fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3487	+
3488	+	for (CompletableFuture<?> future : fs)
3489	+	checkIncomplete(future);
3490	+
3491	+	for (CompletableFuture<?> future : fs)
3492	+	future.complete(null);
3493	+
3494	+	incomplete.complete(v);
3495	+
3496	+	for (CompletableFuture<?> future : fs)
3497	+	checkCompletedNormally(future, null);
3498	+
3499	+	assertEquals(0, e.count.get());
3500	+	}}
3501	+
3502	+	/**
3503		* toCompletableFuture returns this CompletableFuture.
3504		*/
3505		public void testToCompletableFuture() {
#	Line 3323 | 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 3368 | 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 3401 | 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 3418 | 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 3436 | 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 3460 | 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 3490 | 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 3506 | Line 3739 | public class CompletableFutureTest exten
3739		long timeoutMillis = timeoutMillis();
3740		CompletableFuture<Integer> f = new CompletableFuture<>();
3741		long startTime = System.nanoTime();
3742	<	f.orTimeout(timeoutMillis, MILLISECONDS);
3742	>	assertSame(f, f.orTimeout(timeoutMillis, MILLISECONDS));
3743		checkCompletedWithTimeoutException(f);
3744		assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3745		}
#	Line 3521 | Line 3754 | public class CompletableFutureTest exten
3754		CompletableFuture<Integer> g = new CompletableFuture<>();
3755		long startTime = System.nanoTime();
3756		f.complete(v1);
3757	<	f.orTimeout(LONG_DELAY_MS, MILLISECONDS);
3758	<	g.orTimeout(LONG_DELAY_MS, MILLISECONDS);
3757	>	assertSame(f, f.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3758	>	assertSame(g, g.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3759		g.complete(v1);
3760		checkCompletedNormally(f, v1);
3761		checkCompletedNormally(g, v1);
#	Line 3537 | Line 3770 | public class CompletableFutureTest exten
3770		() -> testCompleteOnTimeout_timesOut(null));
3771		}
3772
3773	+	/**
3774	+	* completeOnTimeout completes with given value if not complete
3775	+	*/
3776		public void testCompleteOnTimeout_timesOut(Integer v) {
3777		long timeoutMillis = timeoutMillis();
3778		CompletableFuture<Integer> f = new CompletableFuture<>();
3779		long startTime = System.nanoTime();
3780	<	f.completeOnTimeout(v, timeoutMillis, MILLISECONDS);
3780	>	assertSame(f, f.completeOnTimeout(v, timeoutMillis, MILLISECONDS));
3781		assertSame(v, f.join());
3782		assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3783		f.complete(99);         // should have no effect
#	Line 3558 | Line 3794 | public class CompletableFutureTest exten
3794		CompletableFuture<Integer> g = new CompletableFuture<>();
3795		long startTime = System.nanoTime();
3796		f.complete(v1);
3797	<	f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS);
3798	<	g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS);
3797	>	assertSame(f, f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3798	>	assertSame(g, g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3799		g.complete(v1);
3800		checkCompletedNormally(f, v1);
3801		checkCompletedNormally(g, v1);
#	Line 3610 | Line 3846 | public class CompletableFutureTest exten
3846		//--- tests of implementation details; not part of official tck ---
3847
3848		Object resultOf(CompletableFuture<?> f) {
3849	+	SecurityManager sm = System.getSecurityManager();
3850	+	if (sm != null) {
3851	+	try {
3852	+	System.setSecurityManager(null);
3853	+	} catch (SecurityException giveUp) {
3854	+	return "Reflection not available";
3855	+	}
3856	+	}
3857	+
3858		try {
3859		java.lang.reflect.Field resultField
3860		= CompletableFuture.class.getDeclaredField("result");
3861		resultField.setAccessible(true);
3862		return resultField.get(f);
3863	<	} catch (Throwable t) { throw new AssertionError(t); }
3863	>	} catch (Throwable t) {
3864	>	throw new AssertionError(t);
3865	>	} finally {
3866	>	if (sm != null) System.setSecurityManager(sm);
3867	>	}
3868		}
3869
3870		public void testExceptionPropagationReusesResultObject() {
#	Line 3626 | 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.thenAcceptBoth(y, v42, new SubtractAction(m)));
3895	<	funs.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m)));
3896	<
3897	<	funs.add((y) -> m.whenComplete(y, (Integer x, Throwable t) -> {}));
3898	<
3899	<	funs.add((y) -> m.thenCompose(y, new CompletableFutureInc(m)));
3900	<
3901	<	funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y, v42}));
3902	<	funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y, incomplete}));
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 3662 | 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 3676 | 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 3687 | 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 3698 | 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 3724 | 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 3744 | 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);
3750	<	}
3751	<	catch (java.lang.reflect.InvocationTargetException expected) {
3752	<	if (! (expected.getCause() instanceof UnsupportedOperationException)) {
4012	>	for (CompletionStage<Integer> stage : stages) {
4013	>	try {
4014	>	method.invoke(stage, args);
4015		bugs.add(method);
3754	–	// 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		}
3757	–	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"); }
4158	>	}
4159	>	// "return", "unit"
4160	>	static <T> CompletableFuture<T> unit(T value) {
4161	>	return completedFuture(value);
4162	>	}
4163	>	// monadic zero ?
4164	>	static <T> CompletableFuture<T> zero() {
4165	>	return failedFuture(new ZeroException());
4166	>	}
4167	>	// >=>
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);
4172	>	}
4173	>
4174	>	static void assertZero(CompletableFuture<?> f) {
4175	>	try {
4176	>	f.getNow(null);
4177	>	throw new AssertionFailedError("should throw");
4178	>	} catch (CompletionException success) {
4179	>	assertTrue(success.getCause() instanceof ZeroException);
4180	>	}
4181	>	}
4182	>
4183	>	static <T> void assertFutureEquals(CompletableFuture<T> f,
4184	>	CompletableFuture<T> g) {
4185	>	T fval = null, gval = null;
4186	>	Throwable fex = null, gex = null;
4187	>
4188	>	try { fval = f.get(); }
4189	>	catch (ExecutionException ex) { fex = ex.getCause(); }
4190	>	catch (Throwable ex) { fex = ex; }
4191	>
4192	>	try { gval = g.get(); }
4193	>	catch (ExecutionException ex) { gex = ex.getCause(); }
4194	>	catch (Throwable ex) { gex = ex; }
4195	>
4196	>	if (fex != null || gex != null)
4197	>	assertSame(fex.getClass(), gex.getClass());
4198	>	else
4199	>	assertEquals(fval, gval);
4200	>	}
4201	>
4202	>	static class PlusFuture<T> extends CompletableFuture<T> {
4203	>	AtomicReference<Throwable> firstFailure = new AtomicReference<>(null);
4204	>	}
4205	>
4206	>	/** Implements "monadic plus". */
4207	>	static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f,
4208	>	CompletableFuture<? extends T> g) {
4209	>	PlusFuture<T> plus = new PlusFuture<T>();
4210	>	BiConsumer<T, Throwable> action = (T result, Throwable ex) -> {
4211	>	try {
4212	>	if (ex == null) {
4213	>	if (plus.complete(result))
4214	>	if (plus.firstFailure.get() != null)
4215	>	plus.firstFailure.set(null);
4216	>	}
4217	>	else if (plus.firstFailure.compareAndSet(null, ex)) {
4218	>	if (plus.isDone())
4219	>	plus.firstFailure.set(null);
4220	>	}
4221	>	else {
4222	>	// first failure has precedence
4223	>	Throwable first = plus.firstFailure.getAndSet(null);
4224	>
4225	>	// may fail with "Self-suppression not permitted"
4226	>	try { first.addSuppressed(ex); }
4227	>	catch (Exception ignored) {}
4228	>
4229	>	plus.completeExceptionally(first);
4230	>	}
4231	>	} catch (Throwable unexpected) {
4232	>	plus.completeExceptionally(unexpected);
4233	>	}
4234	>	};
4235	>	f.whenComplete(action);
4236	>	g.whenComplete(action);
4237	>	return plus;
4238	>	}
4239	>	}
4240	>
4241	>	/**
4242	>	* CompletableFuture is an additive monad - sort of.
4243	>	* https://en.wikipedia.org/wiki/Monad_(functional_programming)#Additive_monads
4244	>	*/
4245	>	public void testAdditiveMonad() throws Throwable {
4246	>	Function<Long, CompletableFuture<Long>> unit = Monad::unit;
4247	>	CompletableFuture<Long> zero = Monad.zero();
4248	>
4249	>	// Some mutually non-commutative functions
4250	>	Function<Long, CompletableFuture<Long>> triple
4251	>	= x -> Monad.unit(3 * x);
4252	>	Function<Long, CompletableFuture<Long>> inc
4253	>	= x -> Monad.unit(x + 1);
4254	>
4255	>	// unit is a right identity: m >>= unit === m
4256	>	Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
4257	>	inc.apply(5L));
4258	>	// unit is a left identity: (unit x) >>= f === f x
4259	>	Monad.assertFutureEquals(unit.apply(5L).thenCompose(inc),
4260	>	inc.apply(5L));
4261	>
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)));
4266	>
4267	>	// The case for CompletableFuture as an additive monad is weaker...
4268	>
4269	>	// zero is a monadic zero
4270	>	Monad.assertZero(zero);
4271	>
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));
4276	>
4277	>	// f plus zero === f
4278	>	Monad.assertFutureEquals(Monad.unit(5L),
4279	>	Monad.plus(Monad.unit(5L), zero));
4280	>	// zero plus f === f
4281	>	Monad.assertFutureEquals(Monad.unit(5L),
4282	>	Monad.plus(zero, Monad.unit(5L)));
4283	>	// zero plus zero === zero
4284	>	Monad.assertZero(Monad.plus(zero, zero));
4285	>	{
4286	>	CompletableFuture<Long> f = Monad.plus(Monad.unit(5L),
4287	>	Monad.unit(8L));
4288	>	// non-determinism
4289	>	assertTrue(f.get() == 5L || f.get() == 8L);
4290	>	}
4291	>
4292	>	CompletableFuture<Long> godot = new CompletableFuture<>();
4293	>	// f plus godot === f (doesn't wait for godot)
4294	>	Monad.assertFutureEquals(Monad.unit(5L),
4295	>	Monad.plus(Monad.unit(5L), godot));
4296	>	// godot plus f === f (doesn't wait for godot)
4297	>	Monad.assertFutureEquals(Monad.unit(5L),
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).
4325	>	*/
4326	>	public void testManyDependents() throws Throwable {
4327	>	final int n = expensiveTests ? 1_000_000 : 10;
4328	>	final CompletableFuture<Void> head = new CompletableFuture<>();
4329	>	final CompletableFuture<Void> complete = CompletableFuture.completedFuture((Void)null);
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());
4335	>
4336	>	head.runAfterBoth(complete, () -> count.getAndIncrement());
4337	>	head.thenAcceptBoth(complete, (x, y) -> count.getAndIncrement());
4338	>	head.thenCombine(complete, (x, y) -> count.getAndIncrement());
4339	>	complete.runAfterBoth(head, () -> count.getAndIncrement());
4340	>	complete.thenAcceptBoth(head, (x, y) -> count.getAndIncrement());
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());
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());
4349	>	}
4350	>	head.complete(null);
4351	>	assertEquals(5 * 3 * n, count.get());
4352	>	}
4353	>
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;
4359	>	for (int i = 0; i < n; i++) {
4360	>	f = new CompletableFuture<>();
4361	>	f.runAfterEither(incomplete, () -> {});
4362	>	f.complete(null);
4363	>
4364	>	f = new CompletableFuture<>();
4365	>	f.acceptEither(incomplete, x -> {});
4366	>	f.complete(null);
4367	>
4368	>	f = new CompletableFuture<>();
4369	>	f.applyToEither(incomplete, x -> x);
4370	>	f.complete(null);
4371	>
4372	>	f = new CompletableFuture<>();
4373	>	CompletableFuture.anyOf(new CompletableFuture<?>[] { f, incomplete });
4374	>	f.complete(null);
4375	>	}
4376	>
4377	>	for (int i = 0; i < n; i++) {
4378	>	f = new CompletableFuture<>();
4379	>	incomplete.runAfterEither(f, () -> {});
4380	>	f.complete(null);
4381	>
4382	>	f = new CompletableFuture<>();
4383	>	incomplete.acceptEither(f, x -> {});
4384	>	f.complete(null);
4385	>
4386	>	f = new CompletableFuture<>();
4387	>	incomplete.applyToEither(f, x -> x);
4388	>	f.complete(null);
4389	>
4390	>	f = new CompletableFuture<>();
4391	>	CompletableFuture.anyOf(new CompletableFuture<?>[] { incomplete, f });
4392	>	f.complete(null);
4393	>	}
4394	>	}
4395	>
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	>	*/
4401	>	public void testAnyOfGarbageRetention() throws Throwable {
4402	>	for (Integer v : new Integer[] { 1, null })
4403	>	{
4404	>	final int n = expensiveTests ? 100_000 : 10;
4405	>	CompletableFuture<Integer>[] fs
4406	>	= (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4407	>	for (int i = 0; i < fs.length; i++)
4408	>	fs[i] = new CompletableFuture<>();
4409	>	fs[fs.length - 1].complete(v);
4410	>	for (int i = 0; i < n; i++)
4411	>	checkCompletedNormally(CompletableFuture.anyOf(fs), v);
4412	>	}}
4413	>
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
4423	>	= (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4424	>	for (int i = 0; i < fs.length; i++)
4425	>	fs[i] = new CompletableFuture<>();
4426	>	for (int i = 0; i < n; i++)
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) {

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