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Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.87 by jsr166, Mon Jun 16 21:14:16 2014 UTC vs.
Revision 1.151 by jsr166, Sun Jun 26 17:45:35 2016 UTC

#	Line 5 | Line 5
5		* http://creativecommons.org/publicdomain/zero/1.0/
6		*/
7
8	<	import junit.framework.*;
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;
15	>
16	>	import java.util.stream.Collectors;
17	>	import java.util.stream.Stream;
18	>
19	>	import java.util.ArrayList;
20	>	import java.util.Arrays;
21	>	import java.util.List;
22	>	import java.util.Objects;
23	>	import java.util.Set;
24		import java.util.concurrent.Callable;
10	–	import java.util.concurrent.Executor;
11	–	import java.util.concurrent.ExecutorService;
12	–	import java.util.concurrent.Executors;
25		import java.util.concurrent.CancellationException;
14	–	import java.util.concurrent.CountDownLatch;
15	–	import java.util.concurrent.ExecutionException;
16	–	import java.util.concurrent.Future;
26		import java.util.concurrent.CompletableFuture;
27		import java.util.concurrent.CompletionException;
28		import java.util.concurrent.CompletionStage;
29	+	import java.util.concurrent.ExecutionException;
30	+	import java.util.concurrent.Executor;
31		import java.util.concurrent.ForkJoinPool;
32		import java.util.concurrent.ForkJoinTask;
33		import java.util.concurrent.TimeoutException;
34	+	import java.util.concurrent.TimeUnit;
35		import java.util.concurrent.atomic.AtomicInteger;
36	<	import static java.util.concurrent.TimeUnit.MILLISECONDS;
25	<	import static java.util.concurrent.TimeUnit.SECONDS;
26	<	import java.util.*;
27	<	import java.util.function.Supplier;
28	<	import java.util.function.Consumer;
36	>	import java.util.concurrent.atomic.AtomicReference;
37		import java.util.function.BiConsumer;
30	–	import java.util.function.Function;
38		import java.util.function.BiFunction;
39	+	import java.util.function.Consumer;
40	+	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
48		public class CompletableFutureTest extends JSR166TestCase {
49
50		public static void main(String[] args) {
51	<	junit.textui.TestRunner.run(suite());
51	>	main(suite(), args);
52		}
53		public static Test suite() {
54		return new TestSuite(CompletableFutureTest.class);
#	Line 44 | Line 59 | public class CompletableFutureTest exten
59		void checkIncomplete(CompletableFuture<?> f) {
60		assertFalse(f.isDone());
61		assertFalse(f.isCancelled());
62	<	assertTrue(f.toString().contains("[Not completed]"));
62	>	assertTrue(f.toString().contains("Not completed"));
63		try {
64		assertNull(f.getNow(null));
65		} catch (Throwable fail) { threadUnexpectedException(fail); }
#	Line 57 | Line 72 | public class CompletableFutureTest exten
72		}
73
74		<T> void checkCompletedNormally(CompletableFuture<T> f, T value) {
75	<	try {
76	<	assertEquals(value, f.get(LONG_DELAY_MS, MILLISECONDS));
62	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
75	>	checkTimedGet(f, value);
76	>
77		try {
78		assertEquals(value, f.join());
79		} catch (Throwable fail) { threadUnexpectedException(fail); }
#	Line 75 | Line 89 | public class CompletableFutureTest exten
89		assertTrue(f.toString().contains("[Completed normally]"));
90		}
91
92	<	void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
93	<	try {
94	<	f.get(LONG_DELAY_MS, MILLISECONDS);
95	<	shouldThrow();
96	<	} catch (ExecutionException success) {
97	<	assertTrue(success.getCause() instanceof CFException);
98	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
99	<	try {
100	<	f.join();
101	<	shouldThrow();
102	<	} catch (CompletionException success) {
103	<	assertTrue(success.getCause() instanceof CFException);
104	<	}
105	<	try {
106	<	f.getNow(null);
107	<	shouldThrow();
108	<	} catch (CompletionException success) {
95	<	assertTrue(success.getCause() instanceof CFException);
92	>	/**
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();
100	>	}
101	>
102	>	void checkCompletedExceptionally(CompletableFuture<?> f,
103	>	boolean wrapped,
104	>	Consumer<Throwable> checker) {
105	>	Throwable cause = exceptionalCompletion(f);
106	>	if (wrapped) {
107	>	assertTrue(cause instanceof CompletionException);
108	>	cause = cause.getCause();
109		}
110	<	try {
98	<	f.get();
99	<	shouldThrow();
100	<	} catch (ExecutionException success) {
101	<	assertTrue(success.getCause() instanceof CFException);
102	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
103	<	assertTrue(f.isDone());
104	<	assertFalse(f.isCancelled());
105	<	assertTrue(f.toString().contains("[Completed exceptionally]"));
106	<	}
110	>	checker.accept(cause);
111
112	<	<U> void checkCompletedExceptionallyWithRootCause(CompletableFuture<U> f,
109	<	Throwable ex) {
112	>	long startTime = System.nanoTime();
113		try {
114		f.get(LONG_DELAY_MS, MILLISECONDS);
115		shouldThrow();
116		} catch (ExecutionException success) {
117	<	assertSame(ex, success.getCause());
117	>	assertSame(cause, success.getCause());
118		} catch (Throwable fail) { threadUnexpectedException(fail); }
119	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
120	+
121		try {
122		f.join();
123		shouldThrow();
124		} catch (CompletionException success) {
125	<	assertSame(ex, success.getCause());
126	<	}
125	>	assertSame(cause, success.getCause());
126	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
127	>
128		try {
129		f.getNow(null);
130		shouldThrow();
131		} catch (CompletionException success) {
132	<	assertSame(ex, success.getCause());
133	<	}
132	>	assertSame(cause, success.getCause());
133	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
134	>
135		try {
136		f.get();
137		shouldThrow();
138		} catch (ExecutionException success) {
139	<	assertSame(ex, success.getCause());
139	>	assertSame(cause, success.getCause());
140		} catch (Throwable fail) { threadUnexpectedException(fail); }
141
135	–	assertTrue(f.isDone());
142		assertFalse(f.isCancelled());
143	+	assertTrue(f.isDone());
144	+	assertTrue(f.isCompletedExceptionally());
145		assertTrue(f.toString().contains("[Completed exceptionally]"));
146		}
147
148	<	<U> void checkCompletedWithWrappedException(CompletableFuture<U> f,
149	<	Throwable ex) {
150	<	checkCompletedExceptionallyWithRootCause(f, ex);
143	<	try {
144	<	CompletableFuture<Throwable> spy = f.handle
145	<	((U u, Throwable t) -> t);
146	<	assertTrue(spy.join() instanceof CompletionException);
147	<	assertSame(ex, spy.join().getCause());
148	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
148	>	void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
149	>	checkCompletedExceptionally(f, true,
150	>	(t) -> assertTrue(t instanceof CFException));
151		}
152
153	<	<U> void checkCompletedExceptionally(CompletableFuture<U> f, Throwable ex) {
154	<	checkCompletedExceptionallyWithRootCause(f, ex);
155	<	try {
156	<	CompletableFuture<Throwable> spy = f.handle
157	<	((U u, Throwable t) -> t);
158	<	assertSame(ex, spy.join());
159	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
153	>	void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
154	>	checkCompletedExceptionally(f, true,
155	>	(t) -> assertTrue(t instanceof CancellationException));
156	>	}
157	>
158	>	void checkCompletedWithTimeoutException(CompletableFuture<?> f) {
159	>	checkCompletedExceptionally(f, false,
160	>	(t) -> assertTrue(t instanceof TimeoutException));
161	>	}
162	>
163	>	void checkCompletedWithWrappedException(CompletableFuture<?> f,
164	>	Throwable 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));
170		}
171
172		void checkCancelled(CompletableFuture<?> f) {
173	+	long startTime = System.nanoTime();
174		try {
175		f.get(LONG_DELAY_MS, MILLISECONDS);
176		shouldThrow();
177		} catch (CancellationException success) {
178		} catch (Throwable fail) { threadUnexpectedException(fail); }
179	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
180	+
181		try {
182		f.join();
183		shouldThrow();
#	Line 176 | Line 191 | public class CompletableFutureTest exten
191		shouldThrow();
192		} catch (CancellationException success) {
193		} catch (Throwable fail) { threadUnexpectedException(fail); }
179	–	assertTrue(f.isDone());
180	–	assertTrue(f.isCompletedExceptionally());
181	–	assertTrue(f.isCancelled());
182	–	assertTrue(f.toString().contains("[Completed exceptionally]"));
183	–	}
194
195	<	void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
196	<	try {
187	<	f.get(LONG_DELAY_MS, MILLISECONDS);
188	<	shouldThrow();
189	<	} catch (ExecutionException success) {
190	<	assertTrue(success.getCause() instanceof CancellationException);
191	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
192	<	try {
193	<	f.join();
194	<	shouldThrow();
195	<	} catch (CompletionException success) {
196	<	assertTrue(success.getCause() instanceof CancellationException);
197	<	}
198	<	try {
199	<	f.getNow(null);
200	<	shouldThrow();
201	<	} catch (CompletionException success) {
202	<	assertTrue(success.getCause() instanceof CancellationException);
203	<	}
204	<	try {
205	<	f.get();
206	<	shouldThrow();
207	<	} catch (ExecutionException success) {
208	<	assertTrue(success.getCause() instanceof CancellationException);
209	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
195	>	assertTrue(exceptionalCompletion(f) instanceof CancellationException);
196	>
197		assertTrue(f.isDone());
211	–	assertFalse(f.isCancelled());
198		assertTrue(f.isCompletedExceptionally());
199	+	assertTrue(f.isCancelled());
200		assertTrue(f.toString().contains("[Completed exceptionally]"));
201		}
202
#	Line 257 | Line 244 | public class CompletableFutureTest exten
244		{
245		CompletableFuture<Integer> f = new CompletableFuture<>();
246		checkIncomplete(f);
247	<	assertTrue(f.cancel(true));
248	<	assertTrue(f.cancel(true));
247	>	assertTrue(f.cancel(mayInterruptIfRunning));
248	>	assertTrue(f.cancel(mayInterruptIfRunning));
249	>	assertTrue(f.cancel(!mayInterruptIfRunning));
250		checkCancelled(f);
251		}}
252
#	Line 471 | Line 459 | public class CompletableFutureTest exten
459		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
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
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
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
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); }
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
533	–
527		class CompletableFutureInc extends CheckedIntegerAction
528		implements Function<Integer, CompletableFuture<Integer>>
529		{
#	Line 547 | Line 540 | public class CompletableFutureTest exten
540		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
#	Line 569 | Line 563 | public class CompletableFutureTest exten
563		}
564		}
565
566	+	static final boolean defaultExecutorIsCommonPool
567	+	= ForkJoinPool.getCommonPoolParallelism() > 1;
568	+
569		/**
570		* Permits the testing of parallel code for the 3 different
571		* execution modes without copy/pasting all the test methods.
572		*/
573		enum ExecutionMode {
574	<	DEFAULT {
574	>	SYNC {
575		public void checkExecutionMode() {
576		assertFalse(ThreadExecutor.startedCurrentThread());
577		assertNull(ForkJoinTask.getPool());
#	Line 650 | Line 647 | public class CompletableFutureTest exten
647
648		ASYNC {
649		public void checkExecutionMode() {
650	<	assertSame(ForkJoinPool.commonPool(),
651	<	ForkJoinTask.getPool());
650	>	assertEquals(defaultExecutorIsCommonPool,
651	>	(ForkJoinPool.commonPool() == ForkJoinTask.getPool()));
652		}
653		public CompletableFuture<Void> runAsync(Runnable a) {
654		return CompletableFuture.runAsync(a);
#	Line 850 | Line 847 | public class CompletableFutureTest exten
847		if (!createIncomplete) assertTrue(f.complete(v1));
848		final CompletableFuture<Integer> g = f.exceptionally
849		((Throwable t) -> {
853	–	// Should not be called
850		a.getAndIncrement();
851	<	throw new AssertionError();
851	>	threadFail("should not be called");
852	>	return null;            // unreached
853		});
854		if (createIncomplete) assertTrue(f.complete(v1));
855
#	Line 875 | Line 872 | public class CompletableFutureTest exten
872		if (!createIncomplete) f.completeExceptionally(ex);
873		final CompletableFuture<Integer> g = f.exceptionally
874		((Throwable t) -> {
875	<	ExecutionMode.DEFAULT.checkExecutionMode();
875	>	ExecutionMode.SYNC.checkExecutionMode();
876		threadAssertSame(t, ex);
877		a.getAndIncrement();
878		return v1;
#	Line 886 | Line 883 | public class CompletableFutureTest exten
883		assertEquals(1, a.get());
884		}}
885
886	+	/**
887	+	* If an "exceptionally action" throws an exception, it completes
888	+	* exceptionally with that exception
889	+	*/
890		public void testExceptionally_exceptionalCompletionActionFailed() {
891		for (boolean createIncomplete : new boolean[] { true, false })
891	–	for (Integer v1 : new Integer[] { 1, null })
892		{
893		final AtomicInteger a = new AtomicInteger(0);
894		final CFException ex1 = new CFException();
#	Line 897 | Line 897 | public class CompletableFutureTest exten
897		if (!createIncomplete) f.completeExceptionally(ex1);
898		final CompletableFuture<Integer> g = f.exceptionally
899		((Throwable t) -> {
900	<	ExecutionMode.DEFAULT.checkExecutionMode();
900	>	ExecutionMode.SYNC.checkExecutionMode();
901		threadAssertSame(t, ex1);
902		a.getAndIncrement();
903		throw ex2;
#	Line 905 | Line 905 | public class CompletableFutureTest exten
905		if (createIncomplete) f.completeExceptionally(ex1);
906
907		checkCompletedWithWrappedException(g, ex2);
908	+	checkCompletedExceptionally(f, ex1);
909		assertEquals(1, a.get());
910		}}
911
#	Line 912 | Line 913 | public class CompletableFutureTest exten
913		* whenComplete action executes on normal completion, propagating
914		* source result.
915		*/
916	<	public void testWhenComplete_normalCompletion1() {
916	>	public void testWhenComplete_normalCompletion() {
917		for (ExecutionMode m : ExecutionMode.values())
918		for (boolean createIncomplete : new boolean[] { true, false })
919		for (Integer v1 : new Integer[] { 1, null })
#	Line 922 | Line 923 | public class CompletableFutureTest exten
923		if (!createIncomplete) assertTrue(f.complete(v1));
924		final CompletableFuture<Integer> g = m.whenComplete
925		(f,
926	<	(Integer x, Throwable t) -> {
926	>	(Integer result, Throwable t) -> {
927		m.checkExecutionMode();
928	<	threadAssertSame(x, v1);
928	>	threadAssertSame(result, v1);
929		threadAssertNull(t);
930		a.getAndIncrement();
931		});
#	Line 942 | Line 943 | public class CompletableFutureTest exten
943		public void testWhenComplete_exceptionalCompletion() {
944		for (ExecutionMode m : ExecutionMode.values())
945		for (boolean createIncomplete : new boolean[] { true, false })
945	–	for (Integer v1 : new Integer[] { 1, null })
946		{
947		final AtomicInteger a = new AtomicInteger(0);
948		final CFException ex = new CFException();
#	Line 950 | Line 950 | public class CompletableFutureTest exten
950		if (!createIncomplete) f.completeExceptionally(ex);
951		final CompletableFuture<Integer> g = m.whenComplete
952		(f,
953	<	(Integer x, Throwable t) -> {
953	>	(Integer result, Throwable t) -> {
954		m.checkExecutionMode();
955	<	threadAssertNull(x);
955	>	threadAssertNull(result);
956		threadAssertSame(t, ex);
957		a.getAndIncrement();
958		});
#	Line 977 | Line 977 | public class CompletableFutureTest exten
977		if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
978		final CompletableFuture<Integer> g = m.whenComplete
979		(f,
980	<	(Integer x, Throwable t) -> {
980	>	(Integer result, Throwable t) -> {
981		m.checkExecutionMode();
982	<	threadAssertNull(x);
982	>	threadAssertNull(result);
983		threadAssertTrue(t instanceof CancellationException);
984		a.getAndIncrement();
985		});
#	Line 994 | Line 994 | public class CompletableFutureTest exten
994		* If a whenComplete action throws an exception when triggered by
995		* a normal completion, it completes exceptionally
996		*/
997	<	public void testWhenComplete_actionFailed() {
997	>	public void testWhenComplete_sourceCompletedNormallyActionFailed() {
998		for (boolean createIncomplete : new boolean[] { true, false })
999		for (ExecutionMode m : ExecutionMode.values())
1000		for (Integer v1 : new Integer[] { 1, null })
#	Line 1005 | Line 1005 | public class CompletableFutureTest exten
1005		if (!createIncomplete) assertTrue(f.complete(v1));
1006		final CompletableFuture<Integer> g = m.whenComplete
1007		(f,
1008	<	(Integer x, Throwable t) -> {
1008	>	(Integer result, Throwable t) -> {
1009		m.checkExecutionMode();
1010	<	threadAssertSame(x, v1);
1010	>	threadAssertSame(result, v1);
1011		threadAssertNull(t);
1012		a.getAndIncrement();
1013		throw ex;
#	Line 1022 | Line 1022 | public class CompletableFutureTest exten
1022		/**
1023		* If a whenComplete action throws an exception when triggered by
1024		* a source completion that also throws an exception, the source
1025	<	* exception takes precedence.
1025	>	* exception takes precedence (unlike handle)
1026		*/
1027	<	public void testWhenComplete_actionFailedSourceFailed() {
1027	>	public void testWhenComplete_sourceFailedActionFailed() {
1028		for (boolean createIncomplete : new boolean[] { true, false })
1029		for (ExecutionMode m : ExecutionMode.values())
1030	–	for (Integer v1 : new Integer[] { 1, null })
1030		{
1031		final AtomicInteger a = new AtomicInteger(0);
1032		final CFException ex1 = new CFException();
#	Line 1037 | Line 1036 | public class CompletableFutureTest exten
1036		if (!createIncomplete) f.completeExceptionally(ex1);
1037		final CompletableFuture<Integer> g = m.whenComplete
1038		(f,
1039	<	(Integer x, Throwable t) -> {
1039	>	(Integer result, Throwable t) -> {
1040		m.checkExecutionMode();
1041		threadAssertSame(t, ex1);
1042	<	threadAssertNull(x);
1042	>	threadAssertNull(result);
1043		a.getAndIncrement();
1044		throw ex2;
1045		});
#	Line 1048 | Line 1047 | public class CompletableFutureTest exten
1047
1048		checkCompletedWithWrappedException(g, ex1);
1049		checkCompletedExceptionally(f, ex1);
1050	+	if (testImplementationDetails) {
1051	+	assertEquals(1, ex1.getSuppressed().length);
1052	+	assertSame(ex2, ex1.getSuppressed()[0]);
1053	+	}
1054		assertEquals(1, a.get());
1055		}}
1056
#	Line 1065 | Line 1068 | public class CompletableFutureTest exten
1068		if (!createIncomplete) assertTrue(f.complete(v1));
1069		final CompletableFuture<Integer> g = m.handle
1070		(f,
1071	<	(Integer x, Throwable t) -> {
1071	>	(Integer result, Throwable t) -> {
1072		m.checkExecutionMode();
1073	<	threadAssertSame(x, v1);
1073	>	threadAssertSame(result, v1);
1074		threadAssertNull(t);
1075		a.getAndIncrement();
1076		return inc(v1);
#	Line 1094 | Line 1097 | public class CompletableFutureTest exten
1097		if (!createIncomplete) f.completeExceptionally(ex);
1098		final CompletableFuture<Integer> g = m.handle
1099		(f,
1100	<	(Integer x, Throwable t) -> {
1100	>	(Integer result, Throwable t) -> {
1101		m.checkExecutionMode();
1102	<	threadAssertNull(x);
1102	>	threadAssertNull(result);
1103		threadAssertSame(t, ex);
1104		a.getAndIncrement();
1105		return v1;
#	Line 1123 | Line 1126 | public class CompletableFutureTest exten
1126		if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1127		final CompletableFuture<Integer> g = m.handle
1128		(f,
1129	<	(Integer x, Throwable t) -> {
1129	>	(Integer result, Throwable t) -> {
1130		m.checkExecutionMode();
1131	<	threadAssertNull(x);
1131	>	threadAssertNull(result);
1132		threadAssertTrue(t instanceof CancellationException);
1133		a.getAndIncrement();
1134		return v1;
#	Line 1138 | Line 1141 | public class CompletableFutureTest exten
1141		}}
1142
1143		/**
1144	<	* handle result completes exceptionally if action does
1144	>	* If a "handle action" throws an exception when triggered by
1145	>	* a normal completion, it completes exceptionally
1146		*/
1147	<	public void testHandle_sourceFailedActionFailed() {
1147	>	public void testHandle_sourceCompletedNormallyActionFailed() {
1148		for (ExecutionMode m : ExecutionMode.values())
1149		for (boolean createIncomplete : new boolean[] { true, false })
1150	+	for (Integer v1 : new Integer[] { 1, null })
1151		{
1152		final CompletableFuture<Integer> f = new CompletableFuture<>();
1153		final AtomicInteger a = new AtomicInteger(0);
1154	<	final CFException ex1 = new CFException();
1155	<	final CFException ex2 = new CFException();
1151	<	if (!createIncomplete) f.completeExceptionally(ex1);
1154	>	final CFException ex = new CFException();
1155	>	if (!createIncomplete) assertTrue(f.complete(v1));
1156		final CompletableFuture<Integer> g = m.handle
1157		(f,
1158	<	(Integer x, Throwable t) -> {
1158	>	(Integer result, Throwable t) -> {
1159		m.checkExecutionMode();
1160	<	threadAssertNull(x);
1161	<	threadAssertSame(ex1, t);
1160	>	threadAssertSame(result, v1);
1161	>	threadAssertNull(t);
1162		a.getAndIncrement();
1163	<	throw ex2;
1163	>	throw ex;
1164		});
1165	<	if (createIncomplete) f.completeExceptionally(ex1);
1165	>	if (createIncomplete) assertTrue(f.complete(v1));
1166
1167	<	checkCompletedWithWrappedException(g, ex2);
1168	<	checkCompletedExceptionally(f, ex1);
1167	>	checkCompletedWithWrappedException(g, ex);
1168	>	checkCompletedNormally(f, v1);
1169		assertEquals(1, a.get());
1170		}}
1171
1172	<	public void testHandle_sourceCompletedNormallyActionFailed() {
1173	<	for (ExecutionMode m : ExecutionMode.values())
1172	>	/**
1173	>	* If a "handle action" throws an exception when triggered by
1174	>	* a source completion that also throws an exception, the action
1175	>	* exception takes precedence (unlike whenComplete)
1176	>	*/
1177	>	public void testHandle_sourceFailedActionFailed() {
1178		for (boolean createIncomplete : new boolean[] { true, false })
1179	<	for (Integer v1 : new Integer[] { 1, null })
1179	>	for (ExecutionMode m : ExecutionMode.values())
1180		{
1173	–	final CompletableFuture<Integer> f = new CompletableFuture<>();
1181		final AtomicInteger a = new AtomicInteger(0);
1182	<	final CFException ex = new CFException();
1183	<	if (!createIncomplete) assertTrue(f.complete(v1));
1182	>	final CFException ex1 = new CFException();
1183	>	final CFException ex2 = new CFException();
1184	>	final CompletableFuture<Integer> f = new CompletableFuture<>();
1185	>
1186	>	if (!createIncomplete) f.completeExceptionally(ex1);
1187		final CompletableFuture<Integer> g = m.handle
1188		(f,
1189	<	(Integer x, Throwable t) -> {
1189	>	(Integer result, Throwable t) -> {
1190		m.checkExecutionMode();
1191	<	threadAssertSame(x, v1);
1192	<	threadAssertNull(t);
1191	>	threadAssertNull(result);
1192	>	threadAssertSame(ex1, t);
1193		a.getAndIncrement();
1194	<	throw ex;
1194	>	throw ex2;
1195		});
1196	<	if (createIncomplete) assertTrue(f.complete(v1));
1196	>	if (createIncomplete) f.completeExceptionally(ex1);
1197
1198	<	checkCompletedWithWrappedException(g, ex);
1199	<	checkCompletedNormally(f, v1);
1198	>	checkCompletedWithWrappedException(g, ex2);
1199	>	checkCompletedExceptionally(f, ex1);
1200		assertEquals(1, a.get());
1201		}}
1202
#	Line 1219 | Line 1229 | public class CompletableFutureTest exten
1229		{
1230		final FailingRunnable r = new FailingRunnable(m);
1231		final CompletableFuture<Void> f = m.runAsync(r);
1232	<	checkCompletedWithWrappedCFException(f);
1232	>	checkCompletedWithWrappedException(f, r.ex);
1233		r.assertInvoked();
1234		}}
1235
#	Line 1253 | Line 1263 | public class CompletableFutureTest exten
1263		{
1264		FailingSupplier r = new FailingSupplier(m);
1265		CompletableFuture<Integer> f = m.supplyAsync(r);
1266	<	checkCompletedWithWrappedCFException(f);
1266	>	checkCompletedWithWrappedException(f, r.ex);
1267		r.assertInvoked();
1268		}}
1269
#	Line 1264 | Line 1274 | public class CompletableFutureTest exten
1274		*/
1275		public void testThenRun_normalCompletion() {
1276		for (ExecutionMode m : ExecutionMode.values())
1267	–	for (boolean createIncomplete : new boolean[] { true, false })
1277		for (Integer v1 : new Integer[] { 1, null })
1278		{
1279		final CompletableFuture<Integer> f = new CompletableFuture<>();
1280	<	final Noop r = new Noop(m);
1281	<	if (!createIncomplete) assertTrue(f.complete(v1));
1273	<	final CompletableFuture<Void> g = m.thenRun(f, r);
1274	<	if (createIncomplete) {
1275	<	checkIncomplete(g);
1276	<	assertTrue(f.complete(v1));
1277	<	}
1280	>	final Noop[] rs = new Noop[6];
1281	>	for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1282
1283	<	checkCompletedNormally(g, null);
1283	>	final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1284	>	final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1285	>	final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1286	>	checkIncomplete(h0);
1287	>	checkIncomplete(h1);
1288	>	checkIncomplete(h2);
1289	>	assertTrue(f.complete(v1));
1290	>	final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1291	>	final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1292	>	final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1293	>
1294	>	checkCompletedNormally(h0, null);
1295	>	checkCompletedNormally(h1, null);
1296	>	checkCompletedNormally(h2, null);
1297	>	checkCompletedNormally(h3, null);
1298	>	checkCompletedNormally(h4, null);
1299	>	checkCompletedNormally(h5, null);
1300		checkCompletedNormally(f, v1);
1301	<	r.assertInvoked();
1301	>	for (Noop r : rs) r.assertInvoked();
1302		}}
1303
1304		/**
#	Line 1287 | Line 1307 | public class CompletableFutureTest exten
1307		*/
1308		public void testThenRun_exceptionalCompletion() {
1309		for (ExecutionMode m : ExecutionMode.values())
1290	–	for (boolean createIncomplete : new boolean[] { true, false })
1310		{
1311		final CFException ex = new CFException();
1312		final CompletableFuture<Integer> f = new CompletableFuture<>();
1313	<	final Noop r = new Noop(m);
1314	<	if (!createIncomplete) f.completeExceptionally(ex);
1296	<	final CompletableFuture<Void> g = m.thenRun(f, r);
1297	<	if (createIncomplete) {
1298	<	checkIncomplete(g);
1299	<	f.completeExceptionally(ex);
1300	<	}
1313	>	final Noop[] rs = new Noop[6];
1314	>	for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1315
1316	<	checkCompletedWithWrappedException(g, ex);
1316	>	final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1317	>	final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1318	>	final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1319	>	checkIncomplete(h0);
1320	>	checkIncomplete(h1);
1321	>	checkIncomplete(h2);
1322	>	assertTrue(f.completeExceptionally(ex));
1323	>	final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1324	>	final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1325	>	final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1326	>
1327	>	checkCompletedWithWrappedException(h0, ex);
1328	>	checkCompletedWithWrappedException(h1, ex);
1329	>	checkCompletedWithWrappedException(h2, ex);
1330	>	checkCompletedWithWrappedException(h3, ex);
1331	>	checkCompletedWithWrappedException(h4, ex);
1332	>	checkCompletedWithWrappedException(h5, ex);
1333		checkCompletedExceptionally(f, ex);
1334	<	r.assertNotInvoked();
1334	>	for (Noop r : rs) r.assertNotInvoked();
1335		}}
1336
1337		/**
#	Line 1309 | Line 1339 | public class CompletableFutureTest exten
1339		*/
1340		public void testThenRun_sourceCancelled() {
1341		for (ExecutionMode m : ExecutionMode.values())
1312	–	for (boolean createIncomplete : new boolean[] { true, false })
1342		for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1343		{
1344		final CompletableFuture<Integer> f = new CompletableFuture<>();
1345	<	final Noop r = new Noop(m);
1346	<	if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1318	<	final CompletableFuture<Void> g = m.thenRun(f, r);
1319	<	if (createIncomplete) {
1320	<	checkIncomplete(g);
1321	<	assertTrue(f.cancel(mayInterruptIfRunning));
1322	<	}
1345	>	final Noop[] rs = new Noop[6];
1346	>	for (int i = 0; i < rs.length; i++) rs[i] = new Noop(m);
1347
1348	<	checkCompletedWithWrappedCancellationException(g);
1348	>	final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1349	>	final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1350	>	final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1351	>	checkIncomplete(h0);
1352	>	checkIncomplete(h1);
1353	>	checkIncomplete(h2);
1354	>	assertTrue(f.cancel(mayInterruptIfRunning));
1355	>	final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1356	>	final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1357	>	final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1358	>
1359	>	checkCompletedWithWrappedCancellationException(h0);
1360	>	checkCompletedWithWrappedCancellationException(h1);
1361	>	checkCompletedWithWrappedCancellationException(h2);
1362	>	checkCompletedWithWrappedCancellationException(h3);
1363	>	checkCompletedWithWrappedCancellationException(h4);
1364	>	checkCompletedWithWrappedCancellationException(h5);
1365		checkCancelled(f);
1366	<	r.assertNotInvoked();
1366	>	for (Noop r : rs) r.assertNotInvoked();
1367		}}
1368
1369		/**
#	Line 1331 | Line 1371 | public class CompletableFutureTest exten
1371		*/
1372		public void testThenRun_actionFailed() {
1373		for (ExecutionMode m : ExecutionMode.values())
1334	–	for (boolean createIncomplete : new boolean[] { true, false })
1374		for (Integer v1 : new Integer[] { 1, null })
1375		{
1376		final CompletableFuture<Integer> f = new CompletableFuture<>();
1377	<	final FailingRunnable r = new FailingRunnable(m);
1378	<	if (!createIncomplete) assertTrue(f.complete(v1));
1340	<	final CompletableFuture<Void> g = m.thenRun(f, r);
1341	<	if (createIncomplete) {
1342	<	checkIncomplete(g);
1343	<	assertTrue(f.complete(v1));
1344	<	}
1377	>	final FailingRunnable[] rs = new FailingRunnable[6];
1378	>	for (int i = 0; i < rs.length; i++) rs[i] = new FailingRunnable(m);
1379
1380	<	checkCompletedWithWrappedCFException(g);
1380	>	final CompletableFuture<Void> h0 = m.thenRun(f, rs[0]);
1381	>	final CompletableFuture<Void> h1 = m.runAfterBoth(f, f, rs[1]);
1382	>	final CompletableFuture<Void> h2 = m.runAfterEither(f, f, rs[2]);
1383	>	assertTrue(f.complete(v1));
1384	>	final CompletableFuture<Void> h3 = m.thenRun(f, rs[3]);
1385	>	final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1386	>	final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1387	>
1388	>	checkCompletedWithWrappedException(h0, rs[0].ex);
1389	>	checkCompletedWithWrappedException(h1, rs[1].ex);
1390	>	checkCompletedWithWrappedException(h2, rs[2].ex);
1391	>	checkCompletedWithWrappedException(h3, rs[3].ex);
1392	>	checkCompletedWithWrappedException(h4, rs[4].ex);
1393	>	checkCompletedWithWrappedException(h5, rs[5].ex);
1394		checkCompletedNormally(f, v1);
1395		}}
1396
#	Line 1352 | Line 1399 | public class CompletableFutureTest exten
1399		*/
1400		public void testThenApply_normalCompletion() {
1401		for (ExecutionMode m : ExecutionMode.values())
1355	–	for (boolean createIncomplete : new boolean[] { true, false })
1402		for (Integer v1 : new Integer[] { 1, null })
1403		{
1404		final CompletableFuture<Integer> f = new CompletableFuture<>();
1405	<	final IncFunction r = new IncFunction(m);
1406	<	if (!createIncomplete) assertTrue(f.complete(v1));
1361	<	final CompletableFuture<Integer> g = m.thenApply(f, r);
1362	<	if (createIncomplete) {
1363	<	checkIncomplete(g);
1364	<	assertTrue(f.complete(v1));
1365	<	}
1405	>	final IncFunction[] rs = new IncFunction[4];
1406	>	for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1407
1408	<	checkCompletedNormally(g, inc(v1));
1408	>	final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1409	>	final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1410	>	checkIncomplete(h0);
1411	>	checkIncomplete(h1);
1412	>	assertTrue(f.complete(v1));
1413	>	final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1414	>	final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1415	>
1416	>	checkCompletedNormally(h0, inc(v1));
1417	>	checkCompletedNormally(h1, inc(v1));
1418	>	checkCompletedNormally(h2, inc(v1));
1419	>	checkCompletedNormally(h3, inc(v1));
1420		checkCompletedNormally(f, v1);
1421	<	r.assertValue(inc(v1));
1421	>	for (IncFunction r : rs) r.assertValue(inc(v1));
1422		}}
1423
1424		/**
#	Line 1375 | Line 1427 | public class CompletableFutureTest exten
1427		*/
1428		public void testThenApply_exceptionalCompletion() {
1429		for (ExecutionMode m : ExecutionMode.values())
1378	–	for (boolean createIncomplete : new boolean[] { true, false })
1430		{
1431		final CFException ex = new CFException();
1432		final CompletableFuture<Integer> f = new CompletableFuture<>();
1433	<	final IncFunction r = new IncFunction(m);
1434	<	if (!createIncomplete) f.completeExceptionally(ex);
1384	<	final CompletableFuture<Integer> g = m.thenApply(f, r);
1385	<	if (createIncomplete) {
1386	<	checkIncomplete(g);
1387	<	f.completeExceptionally(ex);
1388	<	}
1433	>	final IncFunction[] rs = new IncFunction[4];
1434	>	for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1435
1436	<	checkCompletedWithWrappedException(g, ex);
1436	>	final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1437	>	final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1438	>	assertTrue(f.completeExceptionally(ex));
1439	>	final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1440	>	final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1441	>
1442	>	checkCompletedWithWrappedException(h0, ex);
1443	>	checkCompletedWithWrappedException(h1, ex);
1444	>	checkCompletedWithWrappedException(h2, ex);
1445	>	checkCompletedWithWrappedException(h3, ex);
1446		checkCompletedExceptionally(f, ex);
1447	<	r.assertNotInvoked();
1447	>	for (IncFunction r : rs) r.assertNotInvoked();
1448		}}
1449
1450		/**
#	Line 1397 | Line 1452 | public class CompletableFutureTest exten
1452		*/
1453		public void testThenApply_sourceCancelled() {
1454		for (ExecutionMode m : ExecutionMode.values())
1400	–	for (boolean createIncomplete : new boolean[] { true, false })
1455		for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1456		{
1457		final CompletableFuture<Integer> f = new CompletableFuture<>();
1458	<	final IncFunction r = new IncFunction(m);
1459	<	if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1406	<	final CompletableFuture<Integer> g = m.thenApply(f, r);
1407	<	if (createIncomplete) {
1408	<	checkIncomplete(g);
1409	<	assertTrue(f.cancel(mayInterruptIfRunning));
1410	<	}
1458	>	final IncFunction[] rs = new IncFunction[4];
1459	>	for (int i = 0; i < rs.length; i++) rs[i] = new IncFunction(m);
1460
1461	<	checkCompletedWithWrappedCancellationException(g);
1461	>	final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1462	>	final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1463	>	assertTrue(f.cancel(mayInterruptIfRunning));
1464	>	final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1465	>	final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1466	>
1467	>	checkCompletedWithWrappedCancellationException(h0);
1468	>	checkCompletedWithWrappedCancellationException(h1);
1469	>	checkCompletedWithWrappedCancellationException(h2);
1470	>	checkCompletedWithWrappedCancellationException(h3);
1471		checkCancelled(f);
1472	<	r.assertNotInvoked();
1472	>	for (IncFunction r : rs) r.assertNotInvoked();
1473		}}
1474
1475		/**
#	Line 1419 | Line 1477 | public class CompletableFutureTest exten
1477		*/
1478		public void testThenApply_actionFailed() {
1479		for (ExecutionMode m : ExecutionMode.values())
1422	–	for (boolean createIncomplete : new boolean[] { true, false })
1480		for (Integer v1 : new Integer[] { 1, null })
1481		{
1482		final CompletableFuture<Integer> f = new CompletableFuture<>();
1483	<	final FailingFunction r = new FailingFunction(m);
1484	<	if (!createIncomplete) assertTrue(f.complete(v1));
1485	<	final CompletableFuture<Integer> g = m.thenApply(f, r);
1486	<	if (createIncomplete) {
1487	<	checkIncomplete(g);
1488	<	assertTrue(f.complete(v1));
1489	<	}
1483	>	final FailingFunction[] rs = new FailingFunction[4];
1484	>	for (int i = 0; i < rs.length; i++) rs[i] = new FailingFunction(m);
1485	>
1486	>	final CompletableFuture<Integer> h0 = m.thenApply(f, rs[0]);
1487	>	final CompletableFuture<Integer> h1 = m.applyToEither(f, f, rs[1]);
1488	>	assertTrue(f.complete(v1));
1489	>	final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1490	>	final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1491
1492	<	checkCompletedWithWrappedCFException(g);
1492	>	checkCompletedWithWrappedException(h0, rs[0].ex);
1493	>	checkCompletedWithWrappedException(h1, rs[1].ex);
1494	>	checkCompletedWithWrappedException(h2, rs[2].ex);
1495	>	checkCompletedWithWrappedException(h3, rs[3].ex);
1496		checkCompletedNormally(f, v1);
1497		}}
1498
#	Line 1440 | Line 1501 | public class CompletableFutureTest exten
1501		*/
1502		public void testThenAccept_normalCompletion() {
1503		for (ExecutionMode m : ExecutionMode.values())
1443	–	for (boolean createIncomplete : new boolean[] { true, false })
1504		for (Integer v1 : new Integer[] { 1, null })
1505		{
1506		final CompletableFuture<Integer> f = new CompletableFuture<>();
1507	<	final NoopConsumer r = new NoopConsumer(m);
1508	<	if (!createIncomplete) assertTrue(f.complete(v1));
1449	<	final CompletableFuture<Void> g = m.thenAccept(f, r);
1450	<	if (createIncomplete) {
1451	<	checkIncomplete(g);
1452	<	assertTrue(f.complete(v1));
1453	<	}
1507	>	final NoopConsumer[] rs = new NoopConsumer[4];
1508	>	for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1509
1510	<	checkCompletedNormally(g, null);
1511	<	r.assertValue(v1);
1510	>	final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1511	>	final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1512	>	checkIncomplete(h0);
1513	>	checkIncomplete(h1);
1514	>	assertTrue(f.complete(v1));
1515	>	final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1516	>	final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1517	>
1518	>	checkCompletedNormally(h0, null);
1519	>	checkCompletedNormally(h1, null);
1520	>	checkCompletedNormally(h2, null);
1521	>	checkCompletedNormally(h3, null);
1522		checkCompletedNormally(f, v1);
1523	+	for (NoopConsumer r : rs) r.assertValue(v1);
1524		}}
1525
1526		/**
#	Line 1463 | Line 1529 | public class CompletableFutureTest exten
1529		*/
1530		public void testThenAccept_exceptionalCompletion() {
1531		for (ExecutionMode m : ExecutionMode.values())
1466	–	for (boolean createIncomplete : new boolean[] { true, false })
1532		{
1533		final CFException ex = new CFException();
1534		final CompletableFuture<Integer> f = new CompletableFuture<>();
1535	<	final NoopConsumer r = new NoopConsumer(m);
1536	<	if (!createIncomplete) f.completeExceptionally(ex);
1472	<	final CompletableFuture<Void> g = m.thenAccept(f, r);
1473	<	if (createIncomplete) {
1474	<	checkIncomplete(g);
1475	<	f.completeExceptionally(ex);
1476	<	}
1535	>	final NoopConsumer[] rs = new NoopConsumer[4];
1536	>	for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1537
1538	<	checkCompletedWithWrappedException(g, ex);
1538	>	final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1539	>	final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1540	>	assertTrue(f.completeExceptionally(ex));
1541	>	final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1542	>	final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1543	>
1544	>	checkCompletedWithWrappedException(h0, ex);
1545	>	checkCompletedWithWrappedException(h1, ex);
1546	>	checkCompletedWithWrappedException(h2, ex);
1547	>	checkCompletedWithWrappedException(h3, ex);
1548		checkCompletedExceptionally(f, ex);
1549	<	r.assertNotInvoked();
1549	>	for (NoopConsumer r : rs) r.assertNotInvoked();
1550		}}
1551
1552		/**
#	Line 1485 | Line 1554 | public class CompletableFutureTest exten
1554		*/
1555		public void testThenAccept_sourceCancelled() {
1556		for (ExecutionMode m : ExecutionMode.values())
1488	–	for (boolean createIncomplete : new boolean[] { true, false })
1557		for (boolean mayInterruptIfRunning : new boolean[] { true, false })
1558		{
1559		final CompletableFuture<Integer> f = new CompletableFuture<>();
1560	<	final NoopConsumer r = new NoopConsumer(m);
1561	<	if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1494	<	final CompletableFuture<Void> g = m.thenAccept(f, r);
1495	<	if (createIncomplete) {
1496	<	checkIncomplete(g);
1497	<	assertTrue(f.cancel(mayInterruptIfRunning));
1498	<	}
1560	>	final NoopConsumer[] rs = new NoopConsumer[4];
1561	>	for (int i = 0; i < rs.length; i++) rs[i] = new NoopConsumer(m);
1562
1563	<	checkCompletedWithWrappedCancellationException(g);
1563	>	final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1564	>	final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1565	>	assertTrue(f.cancel(mayInterruptIfRunning));
1566	>	final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1567	>	final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1568	>
1569	>	checkCompletedWithWrappedCancellationException(h0);
1570	>	checkCompletedWithWrappedCancellationException(h1);
1571	>	checkCompletedWithWrappedCancellationException(h2);
1572	>	checkCompletedWithWrappedCancellationException(h3);
1573		checkCancelled(f);
1574	<	r.assertNotInvoked();
1574	>	for (NoopConsumer r : rs) r.assertNotInvoked();
1575		}}
1576
1577		/**
#	Line 1507 | Line 1579 | public class CompletableFutureTest exten
1579		*/
1580		public void testThenAccept_actionFailed() {
1581		for (ExecutionMode m : ExecutionMode.values())
1510	–	for (boolean createIncomplete : new boolean[] { true, false })
1582		for (Integer v1 : new Integer[] { 1, null })
1583		{
1584		final CompletableFuture<Integer> f = new CompletableFuture<>();
1585	<	final FailingConsumer r = new FailingConsumer(m);
1586	<	if (!createIncomplete) f.complete(v1);
1516	<	final CompletableFuture<Void> g = m.thenAccept(f, r);
1517	<	if (createIncomplete) {
1518	<	checkIncomplete(g);
1519	<	f.complete(v1);
1520	<	}
1585	>	final FailingConsumer[] rs = new FailingConsumer[4];
1586	>	for (int i = 0; i < rs.length; i++) rs[i] = new FailingConsumer(m);
1587
1588	<	checkCompletedWithWrappedCFException(g);
1588	>	final CompletableFuture<Void> h0 = m.thenAccept(f, rs[0]);
1589	>	final CompletableFuture<Void> h1 = m.acceptEither(f, f, rs[1]);
1590	>	assertTrue(f.complete(v1));
1591	>	final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1592	>	final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1593	>
1594	>	checkCompletedWithWrappedException(h0, rs[0].ex);
1595	>	checkCompletedWithWrappedException(h1, rs[1].ex);
1596	>	checkCompletedWithWrappedException(h2, rs[2].ex);
1597	>	checkCompletedWithWrappedException(h3, rs[3].ex);
1598		checkCompletedNormally(f, v1);
1599		}}
1600
#	Line 1535 | Line 1610 | public class CompletableFutureTest exten
1610		{
1611		final CompletableFuture<Integer> f = new CompletableFuture<>();
1612		final CompletableFuture<Integer> g = new CompletableFuture<>();
1613	<	final SubtractFunction r1 = new SubtractFunction(m);
1614	<	final SubtractFunction r2 = new SubtractFunction(m);
1540	<	final SubtractFunction r3 = new SubtractFunction(m);
1613	>	final SubtractFunction[] rs = new SubtractFunction[6];
1614	>	for (int i = 0; i < rs.length; i++) rs[i] = new SubtractFunction(m);
1615
1616		final CompletableFuture<Integer> fst =  fFirst ? f : g;
1617		final CompletableFuture<Integer> snd = !fFirst ? f : g;
1618		final Integer w1 =  fFirst ? v1 : v2;
1619		final Integer w2 = !fFirst ? v1 : v2;
1620
1621	<	final CompletableFuture<Integer> h1 = m.thenCombine(f, g, r1);
1621	>	final CompletableFuture<Integer> h0 = m.thenCombine(f, g, rs[0]);
1622	>	final CompletableFuture<Integer> h1 = m.thenCombine(fst, fst, rs[1]);
1623		assertTrue(fst.complete(w1));
1624	<	final CompletableFuture<Integer> h2 = m.thenCombine(f, g, r2);
1625	<	checkIncomplete(h1);
1626	<	checkIncomplete(h2);
1627	<	r1.assertNotInvoked();
1628	<	r2.assertNotInvoked();
1624	>	final CompletableFuture<Integer> h2 = m.thenCombine(f, g, rs[2]);
1625	>	final CompletableFuture<Integer> h3 = m.thenCombine(fst, fst, rs[3]);
1626	>	checkIncomplete(h0); rs[0].assertNotInvoked();
1627	>	checkIncomplete(h2); rs[2].assertNotInvoked();
1628	>	checkCompletedNormally(h1, subtract(w1, w1));
1629	>	checkCompletedNormally(h3, subtract(w1, w1));
1630	>	rs[1].assertValue(subtract(w1, w1));
1631	>	rs[3].assertValue(subtract(w1, w1));
1632		assertTrue(snd.complete(w2));
1633	<	final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1633	>	final CompletableFuture<Integer> h4 = m.thenCombine(f, g, rs[4]);
1634
1635	<	checkCompletedNormally(h1, subtract(v1, v2));
1635	>	checkCompletedNormally(h0, subtract(v1, v2));
1636		checkCompletedNormally(h2, subtract(v1, v2));
1637	<	checkCompletedNormally(h3, subtract(v1, v2));
1638	<	r1.assertValue(subtract(v1, v2));
1639	<	r2.assertValue(subtract(v1, v2));
1640	<	r3.assertValue(subtract(v1, v2));
1637	>	checkCompletedNormally(h4, subtract(v1, v2));
1638	>	rs[0].assertValue(subtract(v1, v2));
1639	>	rs[2].assertValue(subtract(v1, v2));
1640	>	rs[4].assertValue(subtract(v1, v2));
1641	>
1642		checkCompletedNormally(f, v1);
1643		checkCompletedNormally(g, v2);
1644		}}
#	Line 1677 | Line 1756 | public class CompletableFutureTest exten
1756		assertTrue(snd.complete(w2));
1757		final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1758
1759	<	checkCompletedWithWrappedCFException(h1);
1760	<	checkCompletedWithWrappedCFException(h2);
1761	<	checkCompletedWithWrappedCFException(h3);
1759	>	checkCompletedWithWrappedException(h1, r1.ex);
1760	>	checkCompletedWithWrappedException(h2, r2.ex);
1761	>	checkCompletedWithWrappedException(h3, r3.ex);
1762		r1.assertInvoked();
1763		r2.assertInvoked();
1764		r3.assertInvoked();
#	Line 1841 | Line 1920 | public class CompletableFutureTest exten
1920		assertTrue(snd.complete(w2));
1921		final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1922
1923	<	checkCompletedWithWrappedCFException(h1);
1924	<	checkCompletedWithWrappedCFException(h2);
1925	<	checkCompletedWithWrappedCFException(h3);
1923	>	checkCompletedWithWrappedException(h1, r1.ex);
1924	>	checkCompletedWithWrappedException(h2, r2.ex);
1925	>	checkCompletedWithWrappedException(h3, r3.ex);
1926		r1.assertInvoked();
1927		r2.assertInvoked();
1928		r3.assertInvoked();
#	Line 2005 | Line 2084 | public class CompletableFutureTest exten
2084		assertTrue(snd.complete(w2));
2085		final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2086
2087	<	checkCompletedWithWrappedCFException(h1);
2088	<	checkCompletedWithWrappedCFException(h2);
2089	<	checkCompletedWithWrappedCFException(h3);
2087	>	checkCompletedWithWrappedException(h1, r1.ex);
2088	>	checkCompletedWithWrappedException(h2, r2.ex);
2089	>	checkCompletedWithWrappedException(h3, r3.ex);
2090		r1.assertInvoked();
2091		r2.assertInvoked();
2092		r3.assertInvoked();
#	Line 2297 | Line 2376 | public class CompletableFutureTest exten
2376		f.complete(v1);
2377		final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2378		final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2379	<	checkCompletedWithWrappedCFException(h0);
2380	<	checkCompletedWithWrappedCFException(h1);
2381	<	checkCompletedWithWrappedCFException(h2);
2382	<	checkCompletedWithWrappedCFException(h3);
2379	>	checkCompletedWithWrappedException(h0, rs[0].ex);
2380	>	checkCompletedWithWrappedException(h1, rs[1].ex);
2381	>	checkCompletedWithWrappedException(h2, rs[2].ex);
2382	>	checkCompletedWithWrappedException(h3, rs[3].ex);
2383		for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2384
2385		g.complete(v2);
#	Line 2309 | Line 2388 | public class CompletableFutureTest exten
2388		final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2389		final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2390
2391	<	checkCompletedWithWrappedCFException(h4);
2391	>	checkCompletedWithWrappedException(h4, rs[4].ex);
2392		assertTrue(Objects.equals(v1, rs[4].value) ||
2393		Objects.equals(v2, rs[4].value));
2394	<	checkCompletedWithWrappedCFException(h5);
2394	>	checkCompletedWithWrappedException(h5, rs[5].ex);
2395		assertTrue(Objects.equals(v1, rs[5].value) ||
2396		Objects.equals(v2, rs[5].value));
2397
#	Line 2556 | Line 2635 | public class CompletableFutureTest exten
2635		f.complete(v1);
2636		final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2637		final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2638	<	checkCompletedWithWrappedCFException(h0);
2639	<	checkCompletedWithWrappedCFException(h1);
2640	<	checkCompletedWithWrappedCFException(h2);
2641	<	checkCompletedWithWrappedCFException(h3);
2638	>	checkCompletedWithWrappedException(h0, rs[0].ex);
2639	>	checkCompletedWithWrappedException(h1, rs[1].ex);
2640	>	checkCompletedWithWrappedException(h2, rs[2].ex);
2641	>	checkCompletedWithWrappedException(h3, rs[3].ex);
2642		for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2643
2644		g.complete(v2);
#	Line 2568 | Line 2647 | public class CompletableFutureTest exten
2647		final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2648		final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2649
2650	<	checkCompletedWithWrappedCFException(h4);
2650	>	checkCompletedWithWrappedException(h4, rs[4].ex);
2651		assertTrue(Objects.equals(v1, rs[4].value) ||
2652		Objects.equals(v2, rs[4].value));
2653	<	checkCompletedWithWrappedCFException(h5);
2653	>	checkCompletedWithWrappedException(h5, rs[5].ex);
2654		assertTrue(Objects.equals(v1, rs[5].value) ||
2655		Objects.equals(v2, rs[5].value));
2656
#	Line 2811 | Line 2890 | public class CompletableFutureTest exten
2890		assertTrue(f.complete(v1));
2891		final CompletableFuture<Void> h2 = m.runAfterEither(f, g, rs[2]);
2892		final CompletableFuture<Void> h3 = m.runAfterEither(g, f, rs[3]);
2893	<	checkCompletedWithWrappedCFException(h0);
2894	<	checkCompletedWithWrappedCFException(h1);
2895	<	checkCompletedWithWrappedCFException(h2);
2896	<	checkCompletedWithWrappedCFException(h3);
2893	>	checkCompletedWithWrappedException(h0, rs[0].ex);
2894	>	checkCompletedWithWrappedException(h1, rs[1].ex);
2895	>	checkCompletedWithWrappedException(h2, rs[2].ex);
2896	>	checkCompletedWithWrappedException(h3, rs[3].ex);
2897		for (int i = 0; i < 4; i++) rs[i].assertInvoked();
2898		assertTrue(g.complete(v2));
2899		final CompletableFuture<Void> h4 = m.runAfterEither(f, g, rs[4]);
2900		final CompletableFuture<Void> h5 = m.runAfterEither(g, f, rs[5]);
2901	<	checkCompletedWithWrappedCFException(h4);
2902	<	checkCompletedWithWrappedCFException(h5);
2901	>	checkCompletedWithWrappedException(h4, rs[4].ex);
2902	>	checkCompletedWithWrappedException(h5, rs[5].ex);
2903
2904		checkCompletedNormally(f, v1);
2905		checkCompletedNormally(g, v2);
#	Line 2881 | Line 2960 | public class CompletableFutureTest exten
2960		final CompletableFuture<Integer> g = m.thenCompose(f, r);
2961		if (createIncomplete) assertTrue(f.complete(v1));
2962
2963	<	checkCompletedWithWrappedCFException(g);
2963	>	checkCompletedWithWrappedException(g, r.ex);
2964		checkCompletedNormally(f, v1);
2965		}}
2966
#	Line 2906 | Line 2985 | public class CompletableFutureTest exten
2985		checkCancelled(f);
2986		}}
2987
2988	+	/**
2989	+	* thenCompose result completes exceptionally if the result of the action does
2990	+	*/
2991	+	public void testThenCompose_actionReturnsFailingFuture() {
2992	+	for (ExecutionMode m : ExecutionMode.values())
2993	+	for (int order = 0; order < 6; order++)
2994	+	for (Integer v1 : new Integer[] { 1, null })
2995	+	{
2996	+	final CFException ex = new CFException();
2997	+	final CompletableFuture<Integer> f = new CompletableFuture<>();
2998	+	final CompletableFuture<Integer> g = new CompletableFuture<>();
2999	+	final CompletableFuture<Integer> h;
3000	+	// Test all permutations of orders
3001	+	switch (order) {
3002	+	case 0:
3003	+	assertTrue(f.complete(v1));
3004	+	assertTrue(g.completeExceptionally(ex));
3005	+	h = m.thenCompose(f, (x -> g));
3006	+	break;
3007	+	case 1:
3008	+	assertTrue(f.complete(v1));
3009	+	h = m.thenCompose(f, (x -> g));
3010	+	assertTrue(g.completeExceptionally(ex));
3011	+	break;
3012	+	case 2:
3013	+	assertTrue(g.completeExceptionally(ex));
3014	+	assertTrue(f.complete(v1));
3015	+	h = m.thenCompose(f, (x -> g));
3016	+	break;
3017	+	case 3:
3018	+	assertTrue(g.completeExceptionally(ex));
3019	+	h = m.thenCompose(f, (x -> g));
3020	+	assertTrue(f.complete(v1));
3021	+	break;
3022	+	case 4:
3023	+	h = m.thenCompose(f, (x -> g));
3024	+	assertTrue(f.complete(v1));
3025	+	assertTrue(g.completeExceptionally(ex));
3026	+	break;
3027	+	case 5:
3028	+	h = m.thenCompose(f, (x -> g));
3029	+	assertTrue(f.complete(v1));
3030	+	assertTrue(g.completeExceptionally(ex));
3031	+	break;
3032	+	default: throw new AssertionError();
3033	+	}
3034	+
3035	+	checkCompletedExceptionally(g, ex);
3036	+	checkCompletedWithWrappedException(h, ex);
3037	+	checkCompletedNormally(f, v1);
3038	+	}}
3039	+
3040		// other static methods
3041
3042		/**
#	Line 2922 | Line 3053 | public class CompletableFutureTest exten
3053		* when all components complete normally
3054		*/
3055		public void testAllOf_normal() throws Exception {
3056	<	for (int k = 1; k < 20; k++) {
3056	>	for (int k = 1; k < 10; k++) {
3057		CompletableFuture<Integer>[] fs
3058		= (CompletableFuture<Integer>[]) new CompletableFuture[k];
3059		for (int i = 0; i < k; i++)
#	Line 2938 | Line 3069 | public class CompletableFutureTest exten
3069		}
3070		}
3071
3072	<	public void testAllOf_backwards() throws Exception {
3073	<	for (int k = 1; k < 20; k++) {
3072	>	public void testAllOf_normal_backwards() throws Exception {
3073	>	for (int k = 1; k < 10; k++) {
3074		CompletableFuture<Integer>[] fs
3075		= (CompletableFuture<Integer>[]) new CompletableFuture[k];
3076		for (int i = 0; i < k; i++)
#	Line 2955 | Line 3086 | public class CompletableFutureTest exten
3086		}
3087		}
3088
3089	+	public void testAllOf_exceptional() throws Exception {
3090	+	for (int k = 1; k < 10; k++) {
3091	+	CompletableFuture<Integer>[] fs
3092	+	= (CompletableFuture<Integer>[]) new CompletableFuture[k];
3093	+	CFException ex = new CFException();
3094	+	for (int i = 0; i < k; i++)
3095	+	fs[i] = new CompletableFuture<>();
3096	+	CompletableFuture<Void> f = CompletableFuture.allOf(fs);
3097	+	for (int i = 0; i < k; i++) {
3098	+	checkIncomplete(f);
3099	+	checkIncomplete(CompletableFuture.allOf(fs));
3100	+	if (i != k / 2) {
3101	+	fs[i].complete(i);
3102	+	checkCompletedNormally(fs[i], i);
3103	+	} else {
3104	+	fs[i].completeExceptionally(ex);
3105	+	checkCompletedExceptionally(fs[i], ex);
3106	+	}
3107	+	}
3108	+	checkCompletedWithWrappedException(f, ex);
3109	+	checkCompletedWithWrappedException(CompletableFuture.allOf(fs), ex);
3110	+	}
3111	+	}
3112	+
3113		/**
3114		* anyOf(no component futures) returns an incomplete future
3115		*/
#	Line 3049 | Line 3204 | public class CompletableFutureTest exten
3204		CompletableFuture<Integer> f = new CompletableFuture<>();
3205		CompletableFuture<Integer> g = new CompletableFuture<>();
3206		CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
3052	–	CompletableFuture<?> h;
3207		ThreadExecutor exec = new ThreadExecutor();
3208
3209		Runnable[] throwingActions = {
3210		() -> CompletableFuture.supplyAsync(null),
3211		() -> CompletableFuture.supplyAsync(null, exec),
3212	<	() -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.DEFAULT, 42), null),
3212	>	() -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.SYNC, 42), null),
3213
3214		() -> CompletableFuture.runAsync(null),
3215		() -> CompletableFuture.runAsync(null, exec),
#	Line 3146 | Line 3300 | public class CompletableFutureTest exten
3300		() -> CompletableFuture.anyOf(null, f),
3301
3302		() -> f.obtrudeException(null),
3303	+
3304	+	() -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3305	+	() -> CompletableFuture.delayedExecutor(1L, null, exec),
3306	+	() -> CompletableFuture.delayedExecutor(1L, null),
3307	+
3308	+	() -> f.orTimeout(1L, null),
3309	+	() -> f.completeOnTimeout(42, 1L, null),
3310	+
3311	+	() -> CompletableFuture.failedFuture(null),
3312	+	() -> CompletableFuture.failedStage(null),
3313		};
3314
3315		assertThrows(NullPointerException.class, throwingActions);
#	Line 3160 | Line 3324 | public class CompletableFutureTest exten
3324		assertSame(f, f.toCompletableFuture());
3325		}
3326
3327	+	// jdk9
3328	+
3329	+	/**
3330	+	* newIncompleteFuture returns an incomplete CompletableFuture
3331	+	*/
3332	+	public void testNewIncompleteFuture() {
3333	+	for (Integer v1 : new Integer[] { 1, null })
3334	+	{
3335	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3336	+	CompletableFuture<Integer> g = f.newIncompleteFuture();
3337	+	checkIncomplete(f);
3338	+	checkIncomplete(g);
3339	+	f.complete(v1);
3340	+	checkCompletedNormally(f, v1);
3341	+	checkIncomplete(g);
3342	+	g.complete(v1);
3343	+	checkCompletedNormally(g, v1);
3344	+	assertSame(g.getClass(), CompletableFuture.class);
3345	+	}}
3346	+
3347	+	/**
3348	+	* completedStage returns a completed CompletionStage
3349	+	*/
3350	+	public void testCompletedStage() {
3351	+	AtomicInteger x = new AtomicInteger(0);
3352	+	AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3353	+	CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3354	+	f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3355	+	assertEquals(x.get(), 1);
3356	+	assertNull(r.get());
3357	+	}
3358	+
3359	+	/**
3360	+	* defaultExecutor by default returns the commonPool if
3361	+	* it supports more than one thread.
3362	+	*/
3363	+	public void testDefaultExecutor() {
3364	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3365	+	Executor e = f.defaultExecutor();
3366	+	Executor c = ForkJoinPool.commonPool();
3367	+	if (ForkJoinPool.getCommonPoolParallelism() > 1)
3368	+	assertSame(e, c);
3369	+	else
3370	+	assertNotSame(e, c);
3371	+	}
3372	+
3373	+	/**
3374	+	* failedFuture returns a CompletableFuture completed
3375	+	* exceptionally with the given Exception
3376	+	*/
3377	+	public void testFailedFuture() {
3378	+	CFException ex = new CFException();
3379	+	CompletableFuture<Integer> f = CompletableFuture.failedFuture(ex);
3380	+	checkCompletedExceptionally(f, ex);
3381	+	}
3382	+
3383	+	/**
3384	+	* failedFuture(null) throws NPE
3385	+	*/
3386	+	public void testFailedFuture_null() {
3387	+	try {
3388	+	CompletableFuture<Integer> f = CompletableFuture.failedFuture(null);
3389	+	shouldThrow();
3390	+	} catch (NullPointerException success) {}
3391	+	}
3392	+
3393	+	/**
3394	+	* copy returns a CompletableFuture that is completed normally,
3395	+	* with the same value, when source is.
3396	+	*/
3397	+	public void testCopy() {
3398	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3399	+	CompletableFuture<Integer> g = f.copy();
3400	+	checkIncomplete(f);
3401	+	checkIncomplete(g);
3402	+	f.complete(1);
3403	+	checkCompletedNormally(f, 1);
3404	+	checkCompletedNormally(g, 1);
3405	+	}
3406	+
3407	+	/**
3408	+	* copy returns a CompletableFuture that is completed exceptionally
3409	+	* when source is.
3410	+	*/
3411	+	public void testCopy2() {
3412	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3413	+	CompletableFuture<Integer> g = f.copy();
3414	+	checkIncomplete(f);
3415	+	checkIncomplete(g);
3416	+	CFException ex = new CFException();
3417	+	f.completeExceptionally(ex);
3418	+	checkCompletedExceptionally(f, ex);
3419	+	checkCompletedWithWrappedException(g, ex);
3420	+	}
3421	+
3422	+	/**
3423	+	* minimalCompletionStage returns a CompletableFuture that is
3424	+	* completed normally, with the same value, when source is.
3425	+	*/
3426	+	public void testMinimalCompletionStage() {
3427	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3428	+	CompletionStage<Integer> g = f.minimalCompletionStage();
3429	+	AtomicInteger x = new AtomicInteger(0);
3430	+	AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3431	+	checkIncomplete(f);
3432	+	g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3433	+	f.complete(1);
3434	+	checkCompletedNormally(f, 1);
3435	+	assertEquals(x.get(), 1);
3436	+	assertNull(r.get());
3437	+	}
3438	+
3439	+	/**
3440	+	* minimalCompletionStage returns a CompletableFuture that is
3441	+	* completed exceptionally when source is.
3442	+	*/
3443	+	public void testMinimalCompletionStage2() {
3444	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3445	+	CompletionStage<Integer> g = f.minimalCompletionStage();
3446	+	AtomicInteger x = new AtomicInteger(0);
3447	+	AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3448	+	g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3449	+	checkIncomplete(f);
3450	+	CFException ex = new CFException();
3451	+	f.completeExceptionally(ex);
3452	+	checkCompletedExceptionally(f, ex);
3453	+	assertEquals(x.get(), 0);
3454	+	assertEquals(r.get().getCause(), ex);
3455	+	}
3456	+
3457	+	/**
3458	+	* failedStage returns a CompletionStage completed
3459	+	* exceptionally with the given Exception
3460	+	*/
3461	+	public void testFailedStage() {
3462	+	CFException ex = new CFException();
3463	+	CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3464	+	AtomicInteger x = new AtomicInteger(0);
3465	+	AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3466	+	f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3467	+	assertEquals(x.get(), 0);
3468	+	assertEquals(r.get(), ex);
3469	+	}
3470	+
3471	+	/**
3472	+	* completeAsync completes with value of given supplier
3473	+	*/
3474	+	public void testCompleteAsync() {
3475	+	for (Integer v1 : new Integer[] { 1, null })
3476	+	{
3477	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3478	+	f.completeAsync(() -> v1);
3479	+	f.join();
3480	+	checkCompletedNormally(f, v1);
3481	+	}}
3482	+
3483	+	/**
3484	+	* completeAsync completes exceptionally if given supplier throws
3485	+	*/
3486	+	public void testCompleteAsync2() {
3487	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3488	+	CFException ex = new CFException();
3489	+	f.completeAsync(() -> {if (true) throw ex; return 1;});
3490	+	try {
3491	+	f.join();
3492	+	shouldThrow();
3493	+	} catch (CompletionException success) {}
3494	+	checkCompletedWithWrappedException(f, ex);
3495	+	}
3496	+
3497	+	/**
3498	+	* completeAsync with given executor completes with value of given supplier
3499	+	*/
3500	+	public void testCompleteAsync3() {
3501	+	for (Integer v1 : new Integer[] { 1, null })
3502	+	{
3503	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3504	+	ThreadExecutor executor = new ThreadExecutor();
3505	+	f.completeAsync(() -> v1, executor);
3506	+	assertSame(v1, f.join());
3507	+	checkCompletedNormally(f, v1);
3508	+	assertEquals(1, executor.count.get());
3509	+	}}
3510	+
3511	+	/**
3512	+	* completeAsync with given executor completes exceptionally if
3513	+	* given supplier throws
3514	+	*/
3515	+	public void testCompleteAsync4() {
3516	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3517	+	CFException ex = new CFException();
3518	+	ThreadExecutor executor = new ThreadExecutor();
3519	+	f.completeAsync(() -> {if (true) throw ex; return 1;}, executor);
3520	+	try {
3521	+	f.join();
3522	+	shouldThrow();
3523	+	} catch (CompletionException success) {}
3524	+	checkCompletedWithWrappedException(f, ex);
3525	+	assertEquals(1, executor.count.get());
3526	+	}
3527	+
3528	+	/**
3529	+	* orTimeout completes with TimeoutException if not complete
3530	+	*/
3531	+	public void testOrTimeout_timesOut() {
3532	+	long timeoutMillis = timeoutMillis();
3533	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3534	+	long startTime = System.nanoTime();
3535	+	assertSame(f, f.orTimeout(timeoutMillis, MILLISECONDS));
3536	+	checkCompletedWithTimeoutException(f);
3537	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3538	+	}
3539	+
3540	+	/**
3541	+	* orTimeout completes normally if completed before timeout
3542	+	*/
3543	+	public void testOrTimeout_completed() {
3544	+	for (Integer v1 : new Integer[] { 1, null })
3545	+	{
3546	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3547	+	CompletableFuture<Integer> g = new CompletableFuture<>();
3548	+	long startTime = System.nanoTime();
3549	+	f.complete(v1);
3550	+	assertSame(f, f.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3551	+	assertSame(g, g.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3552	+	g.complete(v1);
3553	+	checkCompletedNormally(f, v1);
3554	+	checkCompletedNormally(g, v1);
3555	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3556	+	}}
3557	+
3558	+	/**
3559	+	* completeOnTimeout completes with given value if not complete
3560	+	*/
3561	+	public void testCompleteOnTimeout_timesOut() {
3562	+	testInParallel(() -> testCompleteOnTimeout_timesOut(42),
3563	+	() -> testCompleteOnTimeout_timesOut(null));
3564	+	}
3565	+
3566	+	/**
3567	+	* completeOnTimeout completes with given value if not complete
3568	+	*/
3569	+	public void testCompleteOnTimeout_timesOut(Integer v) {
3570	+	long timeoutMillis = timeoutMillis();
3571	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3572	+	long startTime = System.nanoTime();
3573	+	assertSame(f, f.completeOnTimeout(v, timeoutMillis, MILLISECONDS));
3574	+	assertSame(v, f.join());
3575	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3576	+	f.complete(99);         // should have no effect
3577	+	checkCompletedNormally(f, v);
3578	+	}
3579	+
3580	+	/**
3581	+	* completeOnTimeout has no effect if completed within timeout
3582	+	*/
3583	+	public void testCompleteOnTimeout_completed() {
3584	+	for (Integer v1 : new Integer[] { 1, null })
3585	+	{
3586	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3587	+	CompletableFuture<Integer> g = new CompletableFuture<>();
3588	+	long startTime = System.nanoTime();
3589	+	f.complete(v1);
3590	+	assertSame(f, f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3591	+	assertSame(g, g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3592	+	g.complete(v1);
3593	+	checkCompletedNormally(f, v1);
3594	+	checkCompletedNormally(g, v1);
3595	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3596	+	}}
3597	+
3598	+	/**
3599	+	* delayedExecutor returns an executor that delays submission
3600	+	*/
3601	+	public void testDelayedExecutor() {
3602	+	testInParallel(() -> testDelayedExecutor(null, null),
3603	+	() -> testDelayedExecutor(null, 1),
3604	+	() -> testDelayedExecutor(new ThreadExecutor(), 1),
3605	+	() -> testDelayedExecutor(new ThreadExecutor(), 1));
3606	+	}
3607	+
3608	+	public void testDelayedExecutor(Executor executor, Integer v) throws Exception {
3609	+	long timeoutMillis = timeoutMillis();
3610	+	// Use an "unreasonably long" long timeout to catch lingering threads
3611	+	long longTimeoutMillis = 1000 * 60 * 60 * 24;
3612	+	final Executor delayer, longDelayer;
3613	+	if (executor == null) {
3614	+	delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS);
3615	+	longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS);
3616	+	} else {
3617	+	delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS, executor);
3618	+	longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS, executor);
3619	+	}
3620	+	long startTime = System.nanoTime();
3621	+	CompletableFuture<Integer> f =
3622	+	CompletableFuture.supplyAsync(() -> v, delayer);
3623	+	CompletableFuture<Integer> g =
3624	+	CompletableFuture.supplyAsync(() -> v, longDelayer);
3625	+
3626	+	assertNull(g.getNow(null));
3627	+
3628	+	assertSame(v, f.get(LONG_DELAY_MS, MILLISECONDS));
3629	+	long millisElapsed = millisElapsedSince(startTime);
3630	+	assertTrue(millisElapsed >= timeoutMillis);
3631	+	assertTrue(millisElapsed < LONG_DELAY_MS / 2);
3632	+
3633	+	checkCompletedNormally(f, v);
3634	+
3635	+	checkIncomplete(g);
3636	+	assertTrue(g.cancel(true));
3637	+	}
3638	+
3639		//--- tests of implementation details; not part of official tck ---
3640
3641		Object resultOf(CompletableFuture<?> f) {
3642	+	SecurityManager sm = System.getSecurityManager();
3643	+	if (sm != null) {
3644	+	try {
3645	+	System.setSecurityManager(null);
3646	+	} catch (SecurityException giveUp) {
3647	+	return "Reflection not available";
3648	+	}
3649	+	}
3650	+
3651		try {
3652		java.lang.reflect.Field resultField
3653		= CompletableFuture.class.getDeclaredField("result");
3654		resultField.setAccessible(true);
3655		return resultField.get(f);
3656	<	} catch (Throwable t) { throw new AssertionError(t); }
3656	>	} catch (Throwable t) {
3657	>	throw new AssertionError(t);
3658	>	} finally {
3659	>	if (sm != null) System.setSecurityManager(sm);
3660	>	}
3661		}
3662
3663		public void testExceptionPropagationReusesResultObject() {
#	Line 3179 | Line 3668 | public class CompletableFutureTest exten
3668		final CompletableFuture<Integer> v42 = CompletableFuture.completedFuture(42);
3669		final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3670
3671	<	List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> dependentFactories
3671	>	List<Function<CompletableFuture<Integer>, CompletableFuture<?>>> funs
3672		= new ArrayList<>();
3673
3674	<	dependentFactories.add((y) -> m.thenRun(y, new Noop(m)));
3675	<	dependentFactories.add((y) -> m.thenAccept(y, new NoopConsumer(m)));
3676	<	dependentFactories.add((y) -> m.thenApply(y, new IncFunction(m)));
3677	<
3678	<	dependentFactories.add((y) -> m.runAfterEither(y, incomplete, new Noop(m)));
3679	<	dependentFactories.add((y) -> m.acceptEither(y, incomplete, new NoopConsumer(m)));
3680	<	dependentFactories.add((y) -> m.applyToEither(y, incomplete, new IncFunction(m)));
3681	<
3682	<	dependentFactories.add((y) -> m.runAfterBoth(y, v42, new Noop(m)));
3683	<	dependentFactories.add((y) -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3684	<	dependentFactories.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m)));
3685	<
3686	<	dependentFactories.add((y) -> m.whenComplete(y, (Integer x, Throwable t) -> {}));
3687	<
3688	<	dependentFactories.add((y) -> m.thenCompose(y, new CompletableFutureInc(m)));
3689	<
3690	<	dependentFactories.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y, v42}));
3691	<	dependentFactories.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y, incomplete}));
3674	>	funs.add((y) -> m.thenRun(y, new Noop(m)));
3675	>	funs.add((y) -> m.thenAccept(y, new NoopConsumer(m)));
3676	>	funs.add((y) -> m.thenApply(y, new IncFunction(m)));
3677	>
3678	>	funs.add((y) -> m.runAfterEither(y, incomplete, new Noop(m)));
3679	>	funs.add((y) -> m.acceptEither(y, incomplete, new NoopConsumer(m)));
3680	>	funs.add((y) -> m.applyToEither(y, incomplete, new IncFunction(m)));
3681	>
3682	>	funs.add((y) -> m.runAfterBoth(y, v42, new Noop(m)));
3683	>	funs.add((y) -> m.runAfterBoth(v42, y, new Noop(m)));
3684	>	funs.add((y) -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3685	>	funs.add((y) -> m.thenAcceptBoth(v42, y, new SubtractAction(m)));
3686	>	funs.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m)));
3687	>	funs.add((y) -> m.thenCombine(v42, y, new SubtractFunction(m)));
3688	>
3689	>	funs.add((y) -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
3690	>
3691	>	funs.add((y) -> m.thenCompose(y, new CompletableFutureInc(m)));
3692	>
3693	>	funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y}));
3694	>	funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y, v42}));
3695	>	funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {v42, y}));
3696	>	funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y}));
3697	>	funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y, incomplete}));
3698	>	funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {incomplete, y}));
3699
3700		for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3701	<	dependentFactory : dependentFactories) {
3701	>	fun : funs) {
3702		CompletableFuture<Integer> f = new CompletableFuture<>();
3703		f.completeExceptionally(ex);
3704		CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3705		checkCompletedWithWrappedException(src, ex);
3706	<	CompletableFuture<?> dep = dependentFactory.apply(src);
3706	>	CompletableFuture<?> dep = fun.apply(src);
3707		checkCompletedWithWrappedException(dep, ex);
3708		assertSame(resultOf(src), resultOf(dep));
3709		}
3710
3711		for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3712	<	dependentFactory : dependentFactories) {
3712	>	fun : funs) {
3713		CompletableFuture<Integer> f = new CompletableFuture<>();
3714		CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3715	<	CompletableFuture<?> dep = dependentFactory.apply(src);
3715	>	CompletableFuture<?> dep = fun.apply(src);
3716		f.completeExceptionally(ex);
3717		checkCompletedWithWrappedException(src, ex);
3718		checkCompletedWithWrappedException(dep, ex);
#	Line 3225 | Line 3721 | public class CompletableFutureTest exten
3721
3722		for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3723		for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3724	<	dependentFactory : dependentFactories) {
3724	>	fun : funs) {
3725		CompletableFuture<Integer> f = new CompletableFuture<>();
3726		f.cancel(mayInterruptIfRunning);
3727		checkCancelled(f);
3728		CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3729		checkCompletedWithWrappedCancellationException(src);
3730	<	CompletableFuture<?> dep = dependentFactory.apply(src);
3730	>	CompletableFuture<?> dep = fun.apply(src);
3731		checkCompletedWithWrappedCancellationException(dep);
3732		assertSame(resultOf(src), resultOf(dep));
3733		}
3734
3735		for (boolean mayInterruptIfRunning : new boolean[] { true, false })
3736		for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3737	<	dependentFactory : dependentFactories) {
3737	>	fun : funs) {
3738		CompletableFuture<Integer> f = new CompletableFuture<>();
3739		CompletableFuture<Integer> src = m.thenApply(f, new IncFunction(m));
3740	<	CompletableFuture<?> dep = dependentFactory.apply(src);
3740	>	CompletableFuture<?> dep = fun.apply(src);
3741		f.cancel(mayInterruptIfRunning);
3742		checkCancelled(f);
3743		checkCompletedWithWrappedCancellationException(src);
#	Line 3250 | Line 3746 | public class CompletableFutureTest exten
3746		}
3747		}}
3748
3749	+	/**
3750	+	* Minimal completion stages throw UOE for all non-CompletionStage methods
3751	+	*/
3752	+	public void testMinimalCompletionStage_minimality() {
3753	+	if (!testImplementationDetails) return;
3754	+	Function<Method, String> toSignature =
3755	+	(method) -> method.getName() + Arrays.toString(method.getParameterTypes());
3756	+	Predicate<Method> isNotStatic =
3757	+	(method) -> (method.getModifiers() & Modifier.STATIC) == 0;
3758	+	List<Method> minimalMethods =
3759	+	Stream.of(Object.class, CompletionStage.class)
3760	+	.flatMap((klazz) -> Stream.of(klazz.getMethods()))
3761	+	.filter(isNotStatic)
3762	+	.collect(Collectors.toList());
3763	+	// Methods from CompletableFuture permitted NOT to throw UOE
3764	+	String[] signatureWhitelist = {
3765	+	"newIncompleteFuture[]",
3766	+	"defaultExecutor[]",
3767	+	"minimalCompletionStage[]",
3768	+	"copy[]",
3769	+	};
3770	+	Set<String> permittedMethodSignatures =
3771	+	Stream.concat(minimalMethods.stream().map(toSignature),
3772	+	Stream.of(signatureWhitelist))
3773	+	.collect(Collectors.toSet());
3774	+	List<Method> allMethods = Stream.of(CompletableFuture.class.getMethods())
3775	+	.filter(isNotStatic)
3776	+	.filter((method) -> !permittedMethodSignatures.contains(toSignature.apply(method)))
3777	+	.collect(Collectors.toList());
3778	+
3779	+	CompletionStage<Integer> minimalStage =
3780	+	new CompletableFuture<Integer>().minimalCompletionStage();
3781	+
3782	+	List<Method> bugs = new ArrayList<>();
3783	+	for (Method method : allMethods) {
3784	+	Class<?>[] parameterTypes = method.getParameterTypes();
3785	+	Object[] args = new Object[parameterTypes.length];
3786	+	// Manufacture boxed primitives for primitive params
3787	+	for (int i = 0; i < args.length; i++) {
3788	+	Class<?> type = parameterTypes[i];
3789	+	if (parameterTypes[i] == boolean.class)
3790	+	args[i] = false;
3791	+	else if (parameterTypes[i] == int.class)
3792	+	args[i] = 0;
3793	+	else if (parameterTypes[i] == long.class)
3794	+	args[i] = 0L;
3795	+	}
3796	+	try {
3797	+	method.invoke(minimalStage, args);
3798	+	bugs.add(method);
3799	+	}
3800	+	catch (java.lang.reflect.InvocationTargetException expected) {
3801	+	if (! (expected.getCause() instanceof UnsupportedOperationException)) {
3802	+	bugs.add(method);
3803	+	// expected.getCause().printStackTrace();
3804	+	}
3805	+	}
3806	+	catch (ReflectiveOperationException bad) { throw new Error(bad); }
3807	+	}
3808	+	if (!bugs.isEmpty())
3809	+	throw new Error("Methods did not throw UOE: " + bugs.toString());
3810	+	}
3811	+
3812	+	static class Monad {
3813	+	static class ZeroException extends RuntimeException {
3814	+	public ZeroException() { super("monadic zero"); }
3815	+	}
3816	+	// "return", "unit"
3817	+	static <T> CompletableFuture<T> unit(T value) {
3818	+	return completedFuture(value);
3819	+	}
3820	+	// monadic zero ?
3821	+	static <T> CompletableFuture<T> zero() {
3822	+	return failedFuture(new ZeroException());
3823	+	}
3824	+	// >=>
3825	+	static <T,U,V> Function<T, CompletableFuture<V>> compose
3826	+	(Function<T, CompletableFuture<U>> f,
3827	+	Function<U, CompletableFuture<V>> g) {
3828	+	return (x) -> f.apply(x).thenCompose(g);
3829	+	}
3830	+
3831	+	static void assertZero(CompletableFuture<?> f) {
3832	+	try {
3833	+	f.getNow(null);
3834	+	throw new AssertionFailedError("should throw");
3835	+	} catch (CompletionException success) {
3836	+	assertTrue(success.getCause() instanceof ZeroException);
3837	+	}
3838	+	}
3839	+
3840	+	static <T> void assertFutureEquals(CompletableFuture<T> f,
3841	+	CompletableFuture<T> g) {
3842	+	T fval = null, gval = null;
3843	+	Throwable fex = null, gex = null;
3844	+
3845	+	try { fval = f.get(); }
3846	+	catch (ExecutionException ex) { fex = ex.getCause(); }
3847	+	catch (Throwable ex) { fex = ex; }
3848	+
3849	+	try { gval = g.get(); }
3850	+	catch (ExecutionException ex) { gex = ex.getCause(); }
3851	+	catch (Throwable ex) { gex = ex; }
3852	+
3853	+	if (fex != null || gex != null)
3854	+	assertSame(fex.getClass(), gex.getClass());
3855	+	else
3856	+	assertEquals(fval, gval);
3857	+	}
3858	+
3859	+	static class PlusFuture<T> extends CompletableFuture<T> {
3860	+	AtomicReference<Throwable> firstFailure = new AtomicReference<>(null);
3861	+	}
3862	+
3863	+	/** Implements "monadic plus". */
3864	+	static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f,
3865	+	CompletableFuture<? extends T> g) {
3866	+	PlusFuture<T> plus = new PlusFuture<T>();
3867	+	BiConsumer<T, Throwable> action = (T result, Throwable ex) -> {
3868	+	try {
3869	+	if (ex == null) {
3870	+	if (plus.complete(result))
3871	+	if (plus.firstFailure.get() != null)
3872	+	plus.firstFailure.set(null);
3873	+	}
3874	+	else if (plus.firstFailure.compareAndSet(null, ex)) {
3875	+	if (plus.isDone())
3876	+	plus.firstFailure.set(null);
3877	+	}
3878	+	else {
3879	+	// first failure has precedence
3880	+	Throwable first = plus.firstFailure.getAndSet(null);
3881	+
3882	+	// may fail with "Self-suppression not permitted"
3883	+	try { first.addSuppressed(ex); }
3884	+	catch (Exception ignored) {}
3885	+
3886	+	plus.completeExceptionally(first);
3887	+	}
3888	+	} catch (Throwable unexpected) {
3889	+	plus.completeExceptionally(unexpected);
3890	+	}
3891	+	};
3892	+	f.whenComplete(action);
3893	+	g.whenComplete(action);
3894	+	return plus;
3895	+	}
3896	+	}
3897	+
3898	+	/**
3899	+	* CompletableFuture is an additive monad - sort of.
3900	+	* https://en.wikipedia.org/wiki/Monad_(functional_programming)#Additive_monads
3901	+	*/
3902	+	public void testAdditiveMonad() throws Throwable {
3903	+	Function<Long, CompletableFuture<Long>> unit = Monad::unit;
3904	+	CompletableFuture<Long> zero = Monad.zero();
3905	+
3906	+	// Some mutually non-commutative functions
3907	+	Function<Long, CompletableFuture<Long>> triple
3908	+	= (x) -> Monad.unit(3 * x);
3909	+	Function<Long, CompletableFuture<Long>> inc
3910	+	= (x) -> Monad.unit(x + 1);
3911	+
3912	+	// unit is a right identity: m >>= unit === m
3913	+	Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
3914	+	inc.apply(5L));
3915	+	// unit is a left identity: (unit x) >>= f === f x
3916	+	Monad.assertFutureEquals(unit.apply(5L).thenCompose(inc),
3917	+	inc.apply(5L));
3918	+
3919	+	// associativity: (m >>= f) >>= g === m >>= ( \x -> (f x >>= g) )
3920	+	Monad.assertFutureEquals(
3921	+	unit.apply(5L).thenCompose(inc).thenCompose(triple),
3922	+	unit.apply(5L).thenCompose((x) -> inc.apply(x).thenCompose(triple)));
3923	+
3924	+	// The case for CompletableFuture as an additive monad is weaker...
3925	+
3926	+	// zero is a monadic zero
3927	+	Monad.assertZero(zero);
3928	+
3929	+	// left zero: zero >>= f === zero
3930	+	Monad.assertZero(zero.thenCompose(inc));
3931	+	// right zero: f >>= (\x -> zero) === zero
3932	+	Monad.assertZero(inc.apply(5L).thenCompose((x) -> zero));
3933	+
3934	+	// f plus zero === f
3935	+	Monad.assertFutureEquals(Monad.unit(5L),
3936	+	Monad.plus(Monad.unit(5L), zero));
3937	+	// zero plus f === f
3938	+	Monad.assertFutureEquals(Monad.unit(5L),
3939	+	Monad.plus(zero, Monad.unit(5L)));
3940	+	// zero plus zero === zero
3941	+	Monad.assertZero(Monad.plus(zero, zero));
3942	+	{
3943	+	CompletableFuture<Long> f = Monad.plus(Monad.unit(5L),
3944	+	Monad.unit(8L));
3945	+	// non-determinism
3946	+	assertTrue(f.get() == 5L || f.get() == 8L);
3947	+	}
3948	+
3949	+	CompletableFuture<Long> godot = new CompletableFuture<>();
3950	+	// f plus godot === f (doesn't wait for godot)
3951	+	Monad.assertFutureEquals(Monad.unit(5L),
3952	+	Monad.plus(Monad.unit(5L), godot));
3953	+	// godot plus f === f (doesn't wait for godot)
3954	+	Monad.assertFutureEquals(Monad.unit(5L),
3955	+	Monad.plus(godot, Monad.unit(5L)));
3956	+	}
3957	+
3958	+	/**
3959	+	* A single CompletableFuture with many dependents.
3960	+	* A demo of scalability - runtime is O(n).
3961	+	*/
3962	+	public void testManyDependents() throws Throwable {
3963	+	final int n = 1_000;
3964	+	final CompletableFuture<Void> head = new CompletableFuture<>();
3965	+	final CompletableFuture<Void> complete = CompletableFuture.completedFuture((Void)null);
3966	+	final AtomicInteger count = new AtomicInteger(0);
3967	+	for (int i = 0; i < n; i++) {
3968	+	head.thenRun(() -> count.getAndIncrement());
3969	+	head.thenAccept((x) -> count.getAndIncrement());
3970	+	head.thenApply((x) -> count.getAndIncrement());
3971	+
3972	+	head.runAfterBoth(complete, () -> count.getAndIncrement());
3973	+	head.thenAcceptBoth(complete, (x, y) -> count.getAndIncrement());
3974	+	head.thenCombine(complete, (x, y) -> count.getAndIncrement());
3975	+	complete.runAfterBoth(head, () -> count.getAndIncrement());
3976	+	complete.thenAcceptBoth(head, (x, y) -> count.getAndIncrement());
3977	+	complete.thenCombine(head, (x, y) -> count.getAndIncrement());
3978	+
3979	+	head.runAfterEither(new CompletableFuture<Void>(), () -> count.getAndIncrement());
3980	+	head.acceptEither(new CompletableFuture<Void>(), (x) -> count.getAndIncrement());
3981	+	head.applyToEither(new CompletableFuture<Void>(), (x) -> count.getAndIncrement());
3982	+	new CompletableFuture<Void>().runAfterEither(head, () -> count.getAndIncrement());
3983	+	new CompletableFuture<Void>().acceptEither(head, (x) -> count.getAndIncrement());
3984	+	new CompletableFuture<Void>().applyToEither(head, (x) -> count.getAndIncrement());
3985	+	}
3986	+	head.complete(null);
3987	+	assertEquals(5 * 3 * n, count.get());
3988	+	}
3989	+
3990	+	//     static <U> U join(CompletionStage<U> stage) {
3991	+	//         CompletableFuture<U> f = new CompletableFuture<>();
3992	+	//         stage.whenComplete((v, ex) -> {
3993	+	//             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
3994	+	//         });
3995	+	//         return f.join();
3996	+	//     }
3997	+
3998	+	//     static <U> boolean isDone(CompletionStage<U> stage) {
3999	+	//         CompletableFuture<U> f = new CompletableFuture<>();
4000	+	//         stage.whenComplete((v, ex) -> {
4001	+	//             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4002	+	//         });
4003	+	//         return f.isDone();
4004	+	//     }
4005	+
4006	+	//     static <U> U join2(CompletionStage<U> stage) {
4007	+	//         return stage.toCompletableFuture().copy().join();
4008	+	//     }
4009	+
4010	+	//     static <U> boolean isDone2(CompletionStage<U> stage) {
4011	+	//         return stage.toCompletableFuture().copy().isDone();
4012	+	//     }
4013	+
4014		}

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