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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 1.186 by jsr166, Mon Jul 3 20:55:45 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 61 | 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 73 | Line 76 | public class CompletableFutureTest exten
76
77		try {
78		assertEquals(value, f.join());
76	–	} catch (Throwable fail) { threadUnexpectedException(fail); }
77	–	try {
79		assertEquals(value, f.getNow(null));
79	–	} catch (Throwable fail) { threadUnexpectedException(fail); }
80	–	try {
80		assertEquals(value, f.get());
81		} catch (Throwable fail) { threadUnexpectedException(fail); }
82		assertTrue(f.isDone());
#	Line 90 | 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 144 | 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 358 | 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 370 | 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 379 | 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 398 | 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 408 | 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 426 | 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 436 | 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 446 | 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	<	FailingSupplier(ExecutionMode m) { super(m); }
458	>	final CFException ex;
459	>	FailingSupplier(ExecutionMode m) { super(m); ex = new CFException(); }
460		public Integer get() {
461		invoked();
462	<	throw new CFException();
462	>	throw ex;
463		}
464		}
465
466	<	class FailingConsumer extends CheckedIntegerAction
466	>	static class FailingConsumer extends CheckedIntegerAction
467		implements Consumer<Integer>
468		{
469	<	FailingConsumer(ExecutionMode m) { super(m); }
469	>	final CFException ex;
470	>	FailingConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
471		public void accept(Integer x) {
472		invoked();
473		value = x;
474	<	throw new CFException();
474	>	throw ex;
475		}
476		}
477
478	<	class FailingBiConsumer extends CheckedIntegerAction
478	>	static class FailingBiConsumer extends CheckedIntegerAction
479		implements BiConsumer<Integer, Integer>
480		{
481	<	FailingBiConsumer(ExecutionMode m) { super(m); }
481	>	final CFException ex;
482	>	FailingBiConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
483		public void accept(Integer x, Integer y) {
484		invoked();
485		value = subtract(x, y);
486	<	throw new CFException();
486	>	throw ex;
487		}
488		}
489
490	<	class FailingFunction extends CheckedIntegerAction
490	>	static class FailingFunction extends CheckedIntegerAction
491		implements Function<Integer, Integer>
492		{
493	<	FailingFunction(ExecutionMode m) { super(m); }
493	>	final CFException ex;
494	>	FailingFunction(ExecutionMode m) { super(m); ex = new CFException(); }
495		public Integer apply(Integer x) {
496		invoked();
497		value = x;
498	<	throw new CFException();
498	>	throw ex;
499		}
500		}
501
502	<	class FailingBiFunction extends CheckedIntegerAction
502	>	static class FailingBiFunction extends CheckedIntegerAction
503		implements BiFunction<Integer, Integer, Integer>
504		{
505	<	FailingBiFunction(ExecutionMode m) { super(m); }
505	>	final CFException ex;
506	>	FailingBiFunction(ExecutionMode m) { super(m); ex = new CFException(); }
507		public Integer apply(Integer x, Integer y) {
508		invoked();
509		value = subtract(x, y);
510	<	throw new CFException();
510	>	throw ex;
511		}
512		}
513
514	<	class FailingRunnable extends CheckedAction implements Runnable {
515	<	FailingRunnable(ExecutionMode m) { super(m); }
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() {
518		invoked();
519	<	throw new CFException();
519	>	throw ex;
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 528 | 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	<	FailingCompletableFutureFunction(ExecutionMode m) { super(m); }
539	>	final CFException ex;
540	>	FailingCompletableFutureFunction(ExecutionMode m) { super(m); ex = new CFException(); }
541		public CompletableFuture<Integer> apply(Integer x) {
542		invoked();
543		value = x;
544	<	throw new CFException();
544	>	throw ex;
545	>	}
546	>	}
547	>
548	>	static class CountingRejectingExecutor implements Executor {
549	>	final RejectedExecutionException ex = new RejectedExecutionException();
550	>	final AtomicInteger count = new AtomicInteger(0);
551	>	public void execute(Runnable r) {
552	>	count.getAndIncrement();
553	>	throw ex;
554		}
555		}
556
#	Line 837 | Line 852 | public class CompletableFutureTest exten
852		if (!createIncomplete) assertTrue(f.complete(v1));
853		final CompletableFuture<Integer> g = f.exceptionally
854		((Throwable t) -> {
840	–	// Should not be called
855		a.getAndIncrement();
856	<	throw new AssertionError();
856	>	threadFail("should not be called");
857	>	return null;            // unreached
858		});
859		if (createIncomplete) assertTrue(f.complete(v1));
860
#	Line 873 | Line 888 | public class CompletableFutureTest exten
888		assertEquals(1, a.get());
889		}}
890
891	+	/**
892	+	* If an "exceptionally action" throws an exception, it completes
893	+	* exceptionally with that exception
894	+	*/
895		public void testExceptionally_exceptionalCompletionActionFailed() {
896		for (boolean createIncomplete : new boolean[] { true, false })
897		{
#	Line 891 | Line 910 | public class CompletableFutureTest exten
910		if (createIncomplete) f.completeExceptionally(ex1);
911
912		checkCompletedWithWrappedException(g, ex2);
913	+	checkCompletedExceptionally(f, ex1);
914		assertEquals(1, a.get());
915		}}
916
#	Line 898 | Line 918 | public class CompletableFutureTest exten
918		* whenComplete action executes on normal completion, propagating
919		* source result.
920		*/
921	<	public void testWhenComplete_normalCompletion1() {
921	>	public void testWhenComplete_normalCompletion() {
922		for (ExecutionMode m : ExecutionMode.values())
923		for (boolean createIncomplete : new boolean[] { true, false })
924		for (Integer v1 : new Integer[] { 1, null })
#	Line 908 | Line 928 | public class CompletableFutureTest exten
928		if (!createIncomplete) assertTrue(f.complete(v1));
929		final CompletableFuture<Integer> g = m.whenComplete
930		(f,
931	<	(Integer x, Throwable t) -> {
931	>	(Integer result, Throwable t) -> {
932		m.checkExecutionMode();
933	<	threadAssertSame(x, v1);
933	>	threadAssertSame(result, v1);
934		threadAssertNull(t);
935		a.getAndIncrement();
936		});
#	Line 935 | Line 955 | public class CompletableFutureTest exten
955		if (!createIncomplete) f.completeExceptionally(ex);
956		final CompletableFuture<Integer> g = m.whenComplete
957		(f,
958	<	(Integer x, Throwable t) -> {
958	>	(Integer result, Throwable t) -> {
959		m.checkExecutionMode();
960	<	threadAssertNull(x);
960	>	threadAssertNull(result);
961		threadAssertSame(t, ex);
962		a.getAndIncrement();
963		});
#	Line 962 | Line 982 | public class CompletableFutureTest exten
982		if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
983		final CompletableFuture<Integer> g = m.whenComplete
984		(f,
985	<	(Integer x, Throwable t) -> {
985	>	(Integer result, Throwable t) -> {
986		m.checkExecutionMode();
987	<	threadAssertNull(x);
987	>	threadAssertNull(result);
988		threadAssertTrue(t instanceof CancellationException);
989		a.getAndIncrement();
990		});
#	Line 979 | Line 999 | public class CompletableFutureTest exten
999		* If a whenComplete action throws an exception when triggered by
1000		* a normal completion, it completes exceptionally
1001		*/
1002	<	public void testWhenComplete_actionFailed() {
1002	>	public void testWhenComplete_sourceCompletedNormallyActionFailed() {
1003		for (boolean createIncomplete : new boolean[] { true, false })
1004		for (ExecutionMode m : ExecutionMode.values())
1005		for (Integer v1 : new Integer[] { 1, null })
#	Line 990 | Line 1010 | public class CompletableFutureTest exten
1010		if (!createIncomplete) assertTrue(f.complete(v1));
1011		final CompletableFuture<Integer> g = m.whenComplete
1012		(f,
1013	<	(Integer x, Throwable t) -> {
1013	>	(Integer result, Throwable t) -> {
1014		m.checkExecutionMode();
1015	<	threadAssertSame(x, v1);
1015	>	threadAssertSame(result, v1);
1016		threadAssertNull(t);
1017		a.getAndIncrement();
1018		throw ex;
#	Line 1007 | Line 1027 | public class CompletableFutureTest exten
1027		/**
1028		* If a whenComplete action throws an exception when triggered by
1029		* a source completion that also throws an exception, the source
1030	<	* exception takes precedence.
1030	>	* exception takes precedence (unlike handle)
1031		*/
1032	<	public void testWhenComplete_actionFailedSourceFailed() {
1032	>	public void testWhenComplete_sourceFailedActionFailed() {
1033		for (boolean createIncomplete : new boolean[] { true, false })
1034		for (ExecutionMode m : ExecutionMode.values())
1035		{
#	Line 1021 | Line 1041 | public class CompletableFutureTest exten
1041		if (!createIncomplete) f.completeExceptionally(ex1);
1042		final CompletableFuture<Integer> g = m.whenComplete
1043		(f,
1044	<	(Integer x, Throwable t) -> {
1044	>	(Integer result, Throwable t) -> {
1045		m.checkExecutionMode();
1046		threadAssertSame(t, ex1);
1047	<	threadAssertNull(x);
1047	>	threadAssertNull(result);
1048		a.getAndIncrement();
1049		throw ex2;
1050		});
#	Line 1032 | Line 1052 | public class CompletableFutureTest exten
1052
1053		checkCompletedWithWrappedException(g, ex1);
1054		checkCompletedExceptionally(f, ex1);
1055	+	if (testImplementationDetails) {
1056	+	assertEquals(1, ex1.getSuppressed().length);
1057	+	assertSame(ex2, ex1.getSuppressed()[0]);
1058	+	}
1059		assertEquals(1, a.get());
1060		}}
1061
#	Line 1049 | Line 1073 | public class CompletableFutureTest exten
1073		if (!createIncomplete) assertTrue(f.complete(v1));
1074		final CompletableFuture<Integer> g = m.handle
1075		(f,
1076	<	(Integer x, Throwable t) -> {
1076	>	(Integer result, Throwable t) -> {
1077		m.checkExecutionMode();
1078	<	threadAssertSame(x, v1);
1078	>	threadAssertSame(result, v1);
1079		threadAssertNull(t);
1080		a.getAndIncrement();
1081		return inc(v1);
#	Line 1078 | Line 1102 | public class CompletableFutureTest exten
1102		if (!createIncomplete) f.completeExceptionally(ex);
1103		final CompletableFuture<Integer> g = m.handle
1104		(f,
1105	<	(Integer x, Throwable t) -> {
1105	>	(Integer result, Throwable t) -> {
1106		m.checkExecutionMode();
1107	<	threadAssertNull(x);
1107	>	threadAssertNull(result);
1108		threadAssertSame(t, ex);
1109		a.getAndIncrement();
1110		return v1;
#	Line 1107 | Line 1131 | public class CompletableFutureTest exten
1131		if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1132		final CompletableFuture<Integer> g = m.handle
1133		(f,
1134	<	(Integer x, Throwable t) -> {
1134	>	(Integer result, Throwable t) -> {
1135		m.checkExecutionMode();
1136	<	threadAssertNull(x);
1136	>	threadAssertNull(result);
1137		threadAssertTrue(t instanceof CancellationException);
1138		a.getAndIncrement();
1139		return v1;
#	Line 1122 | Line 1146 | public class CompletableFutureTest exten
1146		}}
1147
1148		/**
1149	<	* handle result completes exceptionally if action does
1149	>	* If a "handle action" throws an exception when triggered by
1150	>	* a normal completion, it completes exceptionally
1151		*/
1152	<	public void testHandle_sourceFailedActionFailed() {
1152	>	public void testHandle_sourceCompletedNormallyActionFailed() {
1153		for (ExecutionMode m : ExecutionMode.values())
1154		for (boolean createIncomplete : new boolean[] { true, false })
1155	+	for (Integer v1 : new Integer[] { 1, null })
1156		{
1157		final CompletableFuture<Integer> f = new CompletableFuture<>();
1158		final AtomicInteger a = new AtomicInteger(0);
1159	<	final CFException ex1 = new CFException();
1160	<	final CFException ex2 = new CFException();
1135	<	if (!createIncomplete) f.completeExceptionally(ex1);
1159	>	final CFException ex = new CFException();
1160	>	if (!createIncomplete) assertTrue(f.complete(v1));
1161		final CompletableFuture<Integer> g = m.handle
1162		(f,
1163	<	(Integer x, Throwable t) -> {
1163	>	(Integer result, Throwable t) -> {
1164		m.checkExecutionMode();
1165	<	threadAssertNull(x);
1166	<	threadAssertSame(ex1, t);
1165	>	threadAssertSame(result, v1);
1166	>	threadAssertNull(t);
1167		a.getAndIncrement();
1168	<	throw ex2;
1168	>	throw ex;
1169		});
1170	<	if (createIncomplete) f.completeExceptionally(ex1);
1170	>	if (createIncomplete) assertTrue(f.complete(v1));
1171
1172	<	checkCompletedWithWrappedException(g, ex2);
1173	<	checkCompletedExceptionally(f, ex1);
1172	>	checkCompletedWithWrappedException(g, ex);
1173	>	checkCompletedNormally(f, v1);
1174		assertEquals(1, a.get());
1175		}}
1176
1177	<	public void testHandle_sourceCompletedNormallyActionFailed() {
1178	<	for (ExecutionMode m : ExecutionMode.values())
1177	>	/**
1178	>	* If a "handle action" throws an exception when triggered by
1179	>	* a source completion that also throws an exception, the action
1180	>	* exception takes precedence (unlike whenComplete)
1181	>	*/
1182	>	public void testHandle_sourceFailedActionFailed() {
1183		for (boolean createIncomplete : new boolean[] { true, false })
1184	<	for (Integer v1 : new Integer[] { 1, null })
1184	>	for (ExecutionMode m : ExecutionMode.values())
1185		{
1157	–	final CompletableFuture<Integer> f = new CompletableFuture<>();
1186		final AtomicInteger a = new AtomicInteger(0);
1187	<	final CFException ex = new CFException();
1188	<	if (!createIncomplete) assertTrue(f.complete(v1));
1187	>	final CFException ex1 = new CFException();
1188	>	final CFException ex2 = new CFException();
1189	>	final CompletableFuture<Integer> f = new CompletableFuture<>();
1190	>
1191	>	if (!createIncomplete) f.completeExceptionally(ex1);
1192		final CompletableFuture<Integer> g = m.handle
1193		(f,
1194	<	(Integer x, Throwable t) -> {
1194	>	(Integer result, Throwable t) -> {
1195		m.checkExecutionMode();
1196	<	threadAssertSame(x, v1);
1197	<	threadAssertNull(t);
1196	>	threadAssertNull(result);
1197	>	threadAssertSame(ex1, t);
1198		a.getAndIncrement();
1199	<	throw ex;
1199	>	throw ex2;
1200		});
1201	<	if (createIncomplete) assertTrue(f.complete(v1));
1201	>	if (createIncomplete) f.completeExceptionally(ex1);
1202
1203	<	checkCompletedWithWrappedException(g, ex);
1204	<	checkCompletedNormally(f, v1);
1203	>	checkCompletedWithWrappedException(g, ex2);
1204	>	checkCompletedExceptionally(f, ex1);
1205		assertEquals(1, a.get());
1206		}}
1207
#	Line 1203 | Line 1234 | public class CompletableFutureTest exten
1234		{
1235		final FailingRunnable r = new FailingRunnable(m);
1236		final CompletableFuture<Void> f = m.runAsync(r);
1237	<	checkCompletedWithWrappedCFException(f);
1237	>	checkCompletedWithWrappedException(f, r.ex);
1238		r.assertInvoked();
1239		}}
1240
1241	+	public void testRunAsync_rejectingExecutor() {
1242	+	CountingRejectingExecutor e = new CountingRejectingExecutor();
1243	+	try {
1244	+	CompletableFuture.runAsync(() -> {}, e);
1245	+	shouldThrow();
1246	+	} catch (Throwable t) {
1247	+	assertSame(e.ex, t);
1248	+	}
1249	+
1250	+	assertEquals(1, e.count.get());
1251	+	}
1252	+
1253		/**
1254		* supplyAsync completes with result of supplier
1255		*/
#	Line 1237 | Line 1280 | public class CompletableFutureTest exten
1280		{
1281		FailingSupplier r = new FailingSupplier(m);
1282		CompletableFuture<Integer> f = m.supplyAsync(r);
1283	<	checkCompletedWithWrappedCFException(f);
1283	>	checkCompletedWithWrappedException(f, r.ex);
1284		r.assertInvoked();
1285		}}
1286
1287	+	public void testSupplyAsync_rejectingExecutor() {
1288	+	CountingRejectingExecutor e = new CountingRejectingExecutor();
1289	+	try {
1290	+	CompletableFuture.supplyAsync(() -> null, e);
1291	+	shouldThrow();
1292	+	} catch (Throwable t) {
1293	+	assertSame(e.ex, t);
1294	+	}
1295	+
1296	+	assertEquals(1, e.count.get());
1297	+	}
1298	+
1299		// seq completion methods
1300
1301		/**
#	Line 1359 | Line 1414 | public class CompletableFutureTest exten
1414		final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1415		final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1416
1417	<	checkCompletedWithWrappedCFException(h0);
1418	<	checkCompletedWithWrappedCFException(h1);
1419	<	checkCompletedWithWrappedCFException(h2);
1420	<	checkCompletedWithWrappedCFException(h3);
1421	<	checkCompletedWithWrappedCFException(h4);
1422	<	checkCompletedWithWrappedCFException(h5);
1417	>	checkCompletedWithWrappedException(h0, rs[0].ex);
1418	>	checkCompletedWithWrappedException(h1, rs[1].ex);
1419	>	checkCompletedWithWrappedException(h2, rs[2].ex);
1420	>	checkCompletedWithWrappedException(h3, rs[3].ex);
1421	>	checkCompletedWithWrappedException(h4, rs[4].ex);
1422	>	checkCompletedWithWrappedException(h5, rs[5].ex);
1423		checkCompletedNormally(f, v1);
1424		}}
1425
#	Line 1463 | Line 1518 | public class CompletableFutureTest exten
1518		final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1519		final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1520
1521	<	checkCompletedWithWrappedCFException(h0);
1522	<	checkCompletedWithWrappedCFException(h1);
1523	<	checkCompletedWithWrappedCFException(h2);
1524	<	checkCompletedWithWrappedCFException(h3);
1521	>	checkCompletedWithWrappedException(h0, rs[0].ex);
1522	>	checkCompletedWithWrappedException(h1, rs[1].ex);
1523	>	checkCompletedWithWrappedException(h2, rs[2].ex);
1524	>	checkCompletedWithWrappedException(h3, rs[3].ex);
1525		checkCompletedNormally(f, v1);
1526		}}
1527
#	Line 1565 | Line 1620 | public class CompletableFutureTest exten
1620		final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1621		final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1622
1623	<	checkCompletedWithWrappedCFException(h0);
1624	<	checkCompletedWithWrappedCFException(h1);
1625	<	checkCompletedWithWrappedCFException(h2);
1626	<	checkCompletedWithWrappedCFException(h3);
1623	>	checkCompletedWithWrappedException(h0, rs[0].ex);
1624	>	checkCompletedWithWrappedException(h1, rs[1].ex);
1625	>	checkCompletedWithWrappedException(h2, rs[2].ex);
1626	>	checkCompletedWithWrappedException(h3, rs[3].ex);
1627		checkCompletedNormally(f, v1);
1628		}}
1629
#	Line 1730 | Line 1785 | public class CompletableFutureTest exten
1785		assertTrue(snd.complete(w2));
1786		final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1787
1788	<	checkCompletedWithWrappedCFException(h1);
1789	<	checkCompletedWithWrappedCFException(h2);
1790	<	checkCompletedWithWrappedCFException(h3);
1788	>	checkCompletedWithWrappedException(h1, r1.ex);
1789	>	checkCompletedWithWrappedException(h2, r2.ex);
1790	>	checkCompletedWithWrappedException(h3, r3.ex);
1791		r1.assertInvoked();
1792		r2.assertInvoked();
1793		r3.assertInvoked();
#	Line 1894 | Line 1949 | public class CompletableFutureTest exten
1949		assertTrue(snd.complete(w2));
1950		final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1951
1952	<	checkCompletedWithWrappedCFException(h1);
1953	<	checkCompletedWithWrappedCFException(h2);
1954	<	checkCompletedWithWrappedCFException(h3);
1952	>	checkCompletedWithWrappedException(h1, r1.ex);
1953	>	checkCompletedWithWrappedException(h2, r2.ex);
1954	>	checkCompletedWithWrappedException(h3, r3.ex);
1955		r1.assertInvoked();
1956		r2.assertInvoked();
1957		r3.assertInvoked();
#	Line 2058 | Line 2113 | public class CompletableFutureTest exten
2113		assertTrue(snd.complete(w2));
2114		final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2115
2116	<	checkCompletedWithWrappedCFException(h1);
2117	<	checkCompletedWithWrappedCFException(h2);
2118	<	checkCompletedWithWrappedCFException(h3);
2116	>	checkCompletedWithWrappedException(h1, r1.ex);
2117	>	checkCompletedWithWrappedException(h2, r2.ex);
2118	>	checkCompletedWithWrappedException(h3, r3.ex);
2119		r1.assertInvoked();
2120		r2.assertInvoked();
2121		r3.assertInvoked();
#	Line 2350 | Line 2405 | public class CompletableFutureTest exten
2405		f.complete(v1);
2406		final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2407		final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2408	<	checkCompletedWithWrappedCFException(h0);
2409	<	checkCompletedWithWrappedCFException(h1);
2410	<	checkCompletedWithWrappedCFException(h2);
2411	<	checkCompletedWithWrappedCFException(h3);
2408	>	checkCompletedWithWrappedException(h0, rs[0].ex);
2409	>	checkCompletedWithWrappedException(h1, rs[1].ex);
2410	>	checkCompletedWithWrappedException(h2, rs[2].ex);
2411	>	checkCompletedWithWrappedException(h3, rs[3].ex);
2412		for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2413
2414		g.complete(v2);
#	Line 2362 | Line 2417 | public class CompletableFutureTest exten
2417		final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2418		final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2419
2420	<	checkCompletedWithWrappedCFException(h4);
2420	>	checkCompletedWithWrappedException(h4, rs[4].ex);
2421		assertTrue(Objects.equals(v1, rs[4].value) ||
2422		Objects.equals(v2, rs[4].value));
2423	<	checkCompletedWithWrappedCFException(h5);
2423	>	checkCompletedWithWrappedException(h5, rs[5].ex);
2424		assertTrue(Objects.equals(v1, rs[5].value) ||
2425		Objects.equals(v2, rs[5].value));
2426
#	Line 2503 | 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 2609 | Line 2664 | public class CompletableFutureTest exten
2664		f.complete(v1);
2665		final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2666		final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2667	<	checkCompletedWithWrappedCFException(h0);
2668	<	checkCompletedWithWrappedCFException(h1);
2669	<	checkCompletedWithWrappedCFException(h2);
2670	<	checkCompletedWithWrappedCFException(h3);
2667	>	checkCompletedWithWrappedException(h0, rs[0].ex);
2668	>	checkCompletedWithWrappedException(h1, rs[1].ex);
2669	>	checkCompletedWithWrappedException(h2, rs[2].ex);
2670	>	checkCompletedWithWrappedException(h3, rs[3].ex);
2671		for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2672
2673		g.complete(v2);
#	Line 2621 | Line 2676 | public class CompletableFutureTest exten
2676		final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2677		final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2678
2679	<	checkCompletedWithWrappedCFException(h4);
2679	>	checkCompletedWithWrappedException(h4, rs[4].ex);
2680		assertTrue(Objects.equals(v1, rs[4].value) ||
2681		Objects.equals(v2, rs[4].value));
2682	<	checkCompletedWithWrappedCFException(h5);
2682	>	checkCompletedWithWrappedException(h5, rs[5].ex);
2683		assertTrue(Objects.equals(v1, rs[5].value) ||
2684		Objects.equals(v2, rs[5].value));
2685
#	Line 2640 | 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 2652 | 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 2758 | 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 2864 | Line 2924 | public class CompletableFutureTest exten
2924		assertTrue(f.complete(v1));
2925		final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2926		final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2927	<	checkCompletedWithWrappedCFException(h0);
2928	<	checkCompletedWithWrappedCFException(h1);
2929	<	checkCompletedWithWrappedCFException(h2);
2930	<	checkCompletedWithWrappedCFException(h3);
2927	>	checkCompletedWithWrappedException(h0, rs[0].ex);
2928	>	checkCompletedWithWrappedException(h1, rs[1].ex);
2929	>	checkCompletedWithWrappedException(h2, rs[2].ex);
2930	>	checkCompletedWithWrappedException(h3, rs[3].ex);
2931		for (int i = 0; i < 4; i++) rs[i].assertInvoked();
2932		assertTrue(g.complete(v2));
2933		final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2934		final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2935	<	checkCompletedWithWrappedCFException(h4);
2936	<	checkCompletedWithWrappedCFException(h5);
2935	>	checkCompletedWithWrappedException(h4, rs[4].ex);
2936	>	checkCompletedWithWrappedException(h5, rs[5].ex);
2937
2938		checkCompletedNormally(f, v1);
2939		checkCompletedNormally(g, v2);
#	Line 2934 | Line 2994 | public class CompletableFutureTest exten
2994		final CompletableFuture<Integer> g = m.thenCompose(f, r);
2995		if (createIncomplete) assertTrue(f.complete(v1));
2996
2997	<	checkCompletedWithWrappedCFException(g);
2997	>	checkCompletedWithWrappedException(g, r.ex);
2998		checkCompletedNormally(f, v1);
2999		}}
3000
#	Line 3043 | Line 3103 | public class CompletableFutureTest exten
3103		}
3104		}
3105
3106	<	public void testAllOf_backwards() throws Exception {
3106	>	public void testAllOf_normal_backwards() throws Exception {
3107		for (int k = 1; k < 10; k++) {
3108		CompletableFuture<Integer>[] fs
3109		= (CompletableFuture<Integer>[]) new CompletableFuture[k];
#	Line 3174 | 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 3193 | 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 3233 | 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 3276 | Line 3337 | public class CompletableFutureTest exten
3337		() -> f.obtrudeException(null),
3338
3339		() -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3340	<	() -> CompletableFuture.delayedExecutor(1L, null, new ThreadExecutor()),
3340	>	() -> CompletableFuture.delayedExecutor(1L, null, exec),
3341		() -> CompletableFuture.delayedExecutor(1L, null),
3342
3343		() -> f.orTimeout(1L, null),
#	Line 3291 | Line 3352 | public class CompletableFutureTest exten
3352		}
3353
3354		/**
3355	+	* Test submissions to an executor that rejects all tasks.
3356	+	*/
3357	+	public void testRejectingExecutor() {
3358	+	for (Integer v : new Integer[] { 1, null })
3359	+	{
3360	+	final CountingRejectingExecutor e = new CountingRejectingExecutor();
3361	+
3362	+	final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3363	+	final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3364	+
3365	+	List<CompletableFuture<?>> futures = new ArrayList<>();
3366	+
3367	+	List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3368	+	srcs.add(complete);
3369	+	srcs.add(incomplete);
3370	+
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));
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));
3383	+	fs.add(src.runAfterEitherAsync(src, () -> {}, e));
3384	+
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	+
3389	+	for (CompletableFuture<?> future : fs) {
3390	+	if (src.isDone())
3391	+	checkCompletedWithWrappedException(future, e.ex);
3392	+	else
3393	+	checkIncomplete(future);
3394	+	}
3395	+	futures.addAll(fs);
3396	+	}
3397	+
3398	+	{
3399	+	List<CompletableFuture<?>> fs = new ArrayList<>();
3400	+
3401	+	fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3402	+	fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3403	+
3404	+	fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3405	+	fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3406	+
3407	+	fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3408	+	fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3409	+
3410	+	for (CompletableFuture<?> future : fs)
3411	+	checkIncomplete(future);
3412	+	futures.addAll(fs);
3413	+	}
3414	+
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));
3420	+
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));
3426	+
3427	+	for (CompletableFuture<?> future : fs)
3428	+	checkCompletedWithWrappedException(future, e.ex);
3429	+	futures.addAll(fs);
3430	+	}
3431	+
3432	+	incomplete.complete(v);
3433	+
3434	+	for (CompletableFuture<?> future : futures)
3435	+	checkCompletedWithWrappedException(future, e.ex);
3436	+
3437	+	assertEquals(futures.size(), e.count.get());
3438	+	}}
3439	+
3440	+	/**
3441	+	* Test submissions to an executor that rejects all tasks, but
3442	+	* should never be invoked because the dependent future is
3443	+	* explicitly completed.
3444	+	*/
3445	+	public void testRejectingExecutorNeverInvoked() {
3446	+	for (Integer v : new Integer[] { 1, null })
3447	+	{
3448	+	final CountingRejectingExecutor e = new CountingRejectingExecutor();
3449	+
3450	+	final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3451	+	final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3452	+
3453	+	List<CompletableFuture<?>> futures = new ArrayList<>();
3454	+
3455	+	List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3456	+	srcs.add(complete);
3457	+	srcs.add(incomplete);
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));
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));
3470	+	fs.add(incomplete.runAfterEitherAsync(incomplete, () -> {}, e));
3471	+
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	+
3476	+	fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3477	+	fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3478	+
3479	+	fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3480	+	fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3481	+
3482	+	fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3483	+	fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3484	+
3485	+	for (CompletableFuture<?> future : fs)
3486	+	checkIncomplete(future);
3487	+
3488	+	for (CompletableFuture<?> future : fs)
3489	+	future.complete(null);
3490	+
3491	+	incomplete.complete(v);
3492	+
3493	+	for (CompletableFuture<?> future : fs)
3494	+	checkCompletedNormally(future, null);
3495	+
3496	+	assertEquals(0, e.count.get());
3497	+	}}
3498	+
3499	+	/**
3500		* toCompletableFuture returns this CompletableFuture.
3501		*/
3502		public void testToCompletableFuture() {
#	Line 3323 | 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 3368 | 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 3401 | 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 3418 | 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 3436 | 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 3460 | 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 3490 | 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 3506 | Line 3736 | public class CompletableFutureTest exten
3736		long timeoutMillis = timeoutMillis();
3737		CompletableFuture<Integer> f = new CompletableFuture<>();
3738		long startTime = System.nanoTime();
3739	<	f.orTimeout(timeoutMillis, MILLISECONDS);
3739	>	assertSame(f, f.orTimeout(timeoutMillis, MILLISECONDS));
3740		checkCompletedWithTimeoutException(f);
3741		assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3742		}
#	Line 3521 | Line 3751 | public class CompletableFutureTest exten
3751		CompletableFuture<Integer> g = new CompletableFuture<>();
3752		long startTime = System.nanoTime();
3753		f.complete(v1);
3754	<	f.orTimeout(LONG_DELAY_MS, MILLISECONDS);
3755	<	g.orTimeout(LONG_DELAY_MS, MILLISECONDS);
3754	>	assertSame(f, f.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3755	>	assertSame(g, g.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3756		g.complete(v1);
3757		checkCompletedNormally(f, v1);
3758		checkCompletedNormally(g, v1);
#	Line 3537 | Line 3767 | public class CompletableFutureTest exten
3767		() -> testCompleteOnTimeout_timesOut(null));
3768		}
3769
3770	+	/**
3771	+	* completeOnTimeout completes with given value if not complete
3772	+	*/
3773		public void testCompleteOnTimeout_timesOut(Integer v) {
3774		long timeoutMillis = timeoutMillis();
3775		CompletableFuture<Integer> f = new CompletableFuture<>();
3776		long startTime = System.nanoTime();
3777	<	f.completeOnTimeout(v, timeoutMillis, MILLISECONDS);
3777	>	assertSame(f, f.completeOnTimeout(v, timeoutMillis, MILLISECONDS));
3778		assertSame(v, f.join());
3779		assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3780		f.complete(99);         // should have no effect
#	Line 3558 | Line 3791 | public class CompletableFutureTest exten
3791		CompletableFuture<Integer> g = new CompletableFuture<>();
3792		long startTime = System.nanoTime();
3793		f.complete(v1);
3794	<	f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS);
3795	<	g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS);
3794	>	assertSame(f, f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3795	>	assertSame(g, g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3796		g.complete(v1);
3797		checkCompletedNormally(f, v1);
3798		checkCompletedNormally(g, v1);
#	Line 3610 | Line 3843 | public class CompletableFutureTest exten
3843		//--- tests of implementation details; not part of official tck ---
3844
3845		Object resultOf(CompletableFuture<?> f) {
3846	+	SecurityManager sm = System.getSecurityManager();
3847	+	if (sm != null) {
3848	+	try {
3849	+	System.setSecurityManager(null);
3850	+	} catch (SecurityException giveUp) {
3851	+	return "Reflection not available";
3852	+	}
3853	+	}
3854	+
3855		try {
3856		java.lang.reflect.Field resultField
3857		= CompletableFuture.class.getDeclaredField("result");
3858		resultField.setAccessible(true);
3859		return resultField.get(f);
3860	<	} catch (Throwable t) { throw new AssertionError(t); }
3860	>	} catch (Throwable t) {
3861	>	throw new AssertionError(t);
3862	>	} finally {
3863	>	if (sm != null) System.setSecurityManager(sm);
3864	>	}
3865		}
3866
3867		public void testExceptionPropagationReusesResultObject() {
#	Line 3626 | 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.thenAcceptBoth(y, v42, new SubtractAction(m)));
3892	<	funs.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m)));
3893	<
3894	<	funs.add((y) -> m.whenComplete(y, (Integer x, Throwable t) -> {}));
3895	<
3896	<	funs.add((y) -> m.thenCompose(y, new CompletableFutureInc(m)));
3897	<
3898	<	funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y, v42}));
3899	<	funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y, incomplete}));
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 3662 | 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 3676 | 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 3687 | 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 3698 | 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 3724 | 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 3744 | 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);
3750	<	}
3751	<	catch (java.lang.reflect.InvocationTargetException expected) {
3752	<	if (! (expected.getCause() instanceof UnsupportedOperationException)) {
4009	>	for (CompletionStage<Integer> stage : stages) {
4010	>	try {
4011	>	method.invoke(stage, args);
4012		bugs.add(method);
3754	–	// 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		}
3757	–	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"); }
4155	>	}
4156	>	// "return", "unit"
4157	>	static <T> CompletableFuture<T> unit(T value) {
4158	>	return completedFuture(value);
4159	>	}
4160	>	// monadic zero ?
4161	>	static <T> CompletableFuture<T> zero() {
4162	>	return failedFuture(new ZeroException());
4163	>	}
4164	>	// >=>
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);
4169	>	}
4170	>
4171	>	static void assertZero(CompletableFuture<?> f) {
4172	>	try {
4173	>	f.getNow(null);
4174	>	throw new AssertionFailedError("should throw");
4175	>	} catch (CompletionException success) {
4176	>	assertTrue(success.getCause() instanceof ZeroException);
4177	>	}
4178	>	}
4179	>
4180	>	static <T> void assertFutureEquals(CompletableFuture<T> f,
4181	>	CompletableFuture<T> g) {
4182	>	T fval = null, gval = null;
4183	>	Throwable fex = null, gex = null;
4184	>
4185	>	try { fval = f.get(); }
4186	>	catch (ExecutionException ex) { fex = ex.getCause(); }
4187	>	catch (Throwable ex) { fex = ex; }
4188	>
4189	>	try { gval = g.get(); }
4190	>	catch (ExecutionException ex) { gex = ex.getCause(); }
4191	>	catch (Throwable ex) { gex = ex; }
4192	>
4193	>	if (fex != null || gex != null)
4194	>	assertSame(fex.getClass(), gex.getClass());
4195	>	else
4196	>	assertEquals(fval, gval);
4197	>	}
4198	>
4199	>	static class PlusFuture<T> extends CompletableFuture<T> {
4200	>	AtomicReference<Throwable> firstFailure = new AtomicReference<>(null);
4201	>	}
4202	>
4203	>	/** Implements "monadic plus". */
4204	>	static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f,
4205	>	CompletableFuture<? extends T> g) {
4206	>	PlusFuture<T> plus = new PlusFuture<T>();
4207	>	BiConsumer<T, Throwable> action = (T result, Throwable ex) -> {
4208	>	try {
4209	>	if (ex == null) {
4210	>	if (plus.complete(result))
4211	>	if (plus.firstFailure.get() != null)
4212	>	plus.firstFailure.set(null);
4213	>	}
4214	>	else if (plus.firstFailure.compareAndSet(null, ex)) {
4215	>	if (plus.isDone())
4216	>	plus.firstFailure.set(null);
4217	>	}
4218	>	else {
4219	>	// first failure has precedence
4220	>	Throwable first = plus.firstFailure.getAndSet(null);
4221	>
4222	>	// may fail with "Self-suppression not permitted"
4223	>	try { first.addSuppressed(ex); }
4224	>	catch (Exception ignored) {}
4225	>
4226	>	plus.completeExceptionally(first);
4227	>	}
4228	>	} catch (Throwable unexpected) {
4229	>	plus.completeExceptionally(unexpected);
4230	>	}
4231	>	};
4232	>	f.whenComplete(action);
4233	>	g.whenComplete(action);
4234	>	return plus;
4235	>	}
4236	>	}
4237	>
4238	>	/**
4239	>	* CompletableFuture is an additive monad - sort of.
4240	>	* https://en.wikipedia.org/wiki/Monad_(functional_programming)#Additive_monads
4241	>	*/
4242	>	public void testAdditiveMonad() throws Throwable {
4243	>	Function<Long, CompletableFuture<Long>> unit = Monad::unit;
4244	>	CompletableFuture<Long> zero = Monad.zero();
4245	>
4246	>	// Some mutually non-commutative functions
4247	>	Function<Long, CompletableFuture<Long>> triple
4248	>	= x -> Monad.unit(3 * x);
4249	>	Function<Long, CompletableFuture<Long>> inc
4250	>	= x -> Monad.unit(x + 1);
4251	>
4252	>	// unit is a right identity: m >>= unit === m
4253	>	Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
4254	>	inc.apply(5L));
4255	>	// unit is a left identity: (unit x) >>= f === f x
4256	>	Monad.assertFutureEquals(unit.apply(5L).thenCompose(inc),
4257	>	inc.apply(5L));
4258	>
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)));
4263	>
4264	>	// The case for CompletableFuture as an additive monad is weaker...
4265	>
4266	>	// zero is a monadic zero
4267	>	Monad.assertZero(zero);
4268	>
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));
4273	>
4274	>	// f plus zero === f
4275	>	Monad.assertFutureEquals(Monad.unit(5L),
4276	>	Monad.plus(Monad.unit(5L), zero));
4277	>	// zero plus f === f
4278	>	Monad.assertFutureEquals(Monad.unit(5L),
4279	>	Monad.plus(zero, Monad.unit(5L)));
4280	>	// zero plus zero === zero
4281	>	Monad.assertZero(Monad.plus(zero, zero));
4282	>	{
4283	>	CompletableFuture<Long> f = Monad.plus(Monad.unit(5L),
4284	>	Monad.unit(8L));
4285	>	// non-determinism
4286	>	assertTrue(f.get() == 5L || f.get() == 8L);
4287	>	}
4288	>
4289	>	CompletableFuture<Long> godot = new CompletableFuture<>();
4290	>	// f plus godot === f (doesn't wait for godot)
4291	>	Monad.assertFutureEquals(Monad.unit(5L),
4292	>	Monad.plus(Monad.unit(5L), godot));
4293	>	// godot plus f === f (doesn't wait for godot)
4294	>	Monad.assertFutureEquals(Monad.unit(5L),
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).
4322	>	*/
4323	>	public void testManyDependents() throws Throwable {
4324	>	final int n = expensiveTests ? 1_000_000 : 10;
4325	>	final CompletableFuture<Void> head = new CompletableFuture<>();
4326	>	final CompletableFuture<Void> complete = CompletableFuture.completedFuture((Void)null);
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());
4332	>
4333	>	head.runAfterBoth(complete, () -> count.getAndIncrement());
4334	>	head.thenAcceptBoth(complete, (x, y) -> count.getAndIncrement());
4335	>	head.thenCombine(complete, (x, y) -> count.getAndIncrement());
4336	>	complete.runAfterBoth(head, () -> count.getAndIncrement());
4337	>	complete.thenAcceptBoth(head, (x, y) -> count.getAndIncrement());
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());
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());
4346	>	}
4347	>	head.complete(null);
4348	>	assertEquals(5 * 3 * n, count.get());
4349	>	}
4350	>
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;
4356	>	for (int i = 0; i < n; i++) {
4357	>	f = new CompletableFuture<>();
4358	>	f.runAfterEither(incomplete, () -> {});
4359	>	f.complete(null);
4360	>
4361	>	f = new CompletableFuture<>();
4362	>	f.acceptEither(incomplete, x -> {});
4363	>	f.complete(null);
4364	>
4365	>	f = new CompletableFuture<>();
4366	>	f.applyToEither(incomplete, x -> x);
4367	>	f.complete(null);
4368	>
4369	>	f = new CompletableFuture<>();
4370	>	CompletableFuture.anyOf(new CompletableFuture<?>[] { f, incomplete });
4371	>	f.complete(null);
4372	>	}
4373	>
4374	>	for (int i = 0; i < n; i++) {
4375	>	f = new CompletableFuture<>();
4376	>	incomplete.runAfterEither(f, () -> {});
4377	>	f.complete(null);
4378	>
4379	>	f = new CompletableFuture<>();
4380	>	incomplete.acceptEither(f, x -> {});
4381	>	f.complete(null);
4382	>
4383	>	f = new CompletableFuture<>();
4384	>	incomplete.applyToEither(f, x -> x);
4385	>	f.complete(null);
4386	>
4387	>	f = new CompletableFuture<>();
4388	>	CompletableFuture.anyOf(new CompletableFuture<?>[] { incomplete, f });
4389	>	f.complete(null);
4390	>	}
4391	>	}
4392	>
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	>	*/
4398	>	public void testAnyOfGarbageRetention() throws Throwable {
4399	>	for (Integer v : new Integer[] { 1, null })
4400	>	{
4401	>	final int n = expensiveTests ? 100_000 : 10;
4402	>	CompletableFuture<Integer>[] fs
4403	>	= (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4404	>	for (int i = 0; i < fs.length; i++)
4405	>	fs[i] = new CompletableFuture<>();
4406	>	fs[fs.length - 1].complete(v);
4407	>	for (int i = 0; i < n; i++)
4408	>	checkCompletedNormally(CompletableFuture.anyOf(fs), v);
4409	>	}}
4410	>
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
4420	>	= (CompletableFuture<Integer>[]) new CompletableFuture<?>[100];
4421	>	for (int i = 0; i < fs.length; i++)
4422	>	fs[i] = new CompletableFuture<>();
4423	>	for (int i = 0; i < n; i++)
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) {

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