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Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.118 by jsr166, Sun Sep 6 05:33:14 2015 UTC vs.
Revision 1.155 by jsr166, Sun Jun 26 20:03:10 2016 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;
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;
25		import java.util.concurrent.CancellationException;
26		import java.util.concurrent.CompletableFuture;
#	Line 20 | 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;
35		import java.util.concurrent.TimeUnit;
36		import java.util.concurrent.atomic.AtomicInteger;
#	Line 28 | Line 39 | import java.util.function.BiConsumer;
39		import java.util.function.BiFunction;
40		import java.util.function.Consumer;
41		import java.util.function.Function;
42	+	import java.util.function.Predicate;
43		import java.util.function.Supplier;
44
45	+	import junit.framework.AssertionFailedError;
46		import junit.framework.Test;
47		import junit.framework.TestSuite;
48
#	Line 77 | Line 90 | public class CompletableFutureTest exten
90		assertTrue(f.toString().contains("[Completed normally]"));
91		}
92
93	<	void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
94	<	long startTime = System.nanoTime();
95	<	long timeoutMillis = LONG_DELAY_MS;
96	<	try {
97	<	f.get(timeoutMillis, MILLISECONDS);
98	<	shouldThrow();
99	<	} catch (ExecutionException success) {
100	<	assertTrue(success.getCause() instanceof CFException);
101	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
102	<	assertTrue(millisElapsedSince(startTime) < timeoutMillis/2);
103	<
104	<	try {
105	<	f.join();
106	<	shouldThrow();
107	<	} catch (CompletionException success) {
108	<	assertTrue(success.getCause() instanceof CFException);
109	<	}
97	<	try {
98	<	f.getNow(null);
99	<	shouldThrow();
100	<	} catch (CompletionException success) {
101	<	assertTrue(success.getCause() instanceof CFException);
93	>	/**
94	>	* Returns the "raw" internal exceptional completion of f,
95	>	* without any additional wrapping with CompletionException.
96	>	*/
97	>	<U> Throwable exceptionalCompletion(CompletableFuture<U> f) {
98	>	// handle (and whenComplete) can distinguish between "direct"
99	>	// and "wrapped" exceptional completion
100	>	return f.handle((U u, Throwable t) -> t).join();
101	>	}
102	>
103	>	void checkCompletedExceptionally(CompletableFuture<?> f,
104	>	boolean wrapped,
105	>	Consumer<Throwable> checker) {
106	>	Throwable cause = exceptionalCompletion(f);
107	>	if (wrapped) {
108	>	assertTrue(cause instanceof CompletionException);
109	>	cause = cause.getCause();
110		}
111	<	try {
104	<	f.get();
105	<	shouldThrow();
106	<	} catch (ExecutionException success) {
107	<	assertTrue(success.getCause() instanceof CFException);
108	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
109	<	assertTrue(f.isDone());
110	<	assertFalse(f.isCancelled());
111	<	assertTrue(f.toString().contains("[Completed exceptionally]"));
112	<	}
111	>	checker.accept(cause);
112
114	–	<U> void checkCompletedExceptionallyWithRootCause(CompletableFuture<U> f,
115	–	Throwable ex) {
113		long startTime = System.nanoTime();
117	–	long timeoutMillis = LONG_DELAY_MS;
114		try {
115	<	f.get(timeoutMillis, MILLISECONDS);
115	>	f.get(LONG_DELAY_MS, MILLISECONDS);
116		shouldThrow();
117		} catch (ExecutionException success) {
118	<	assertSame(ex, success.getCause());
118	>	assertSame(cause, success.getCause());
119		} catch (Throwable fail) { threadUnexpectedException(fail); }
120	<	assertTrue(millisElapsedSince(startTime) < timeoutMillis/2);
120	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
121
122		try {
123		f.join();
124		shouldThrow();
125		} catch (CompletionException success) {
126	<	assertSame(ex, success.getCause());
127	<	}
126	>	assertSame(cause, success.getCause());
127	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
128	>
129		try {
130		f.getNow(null);
131		shouldThrow();
132		} catch (CompletionException success) {
133	<	assertSame(ex, success.getCause());
134	<	}
133	>	assertSame(cause, success.getCause());
134	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
135	>
136		try {
137		f.get();
138		shouldThrow();
139		} catch (ExecutionException success) {
140	<	assertSame(ex, success.getCause());
140	>	assertSame(cause, success.getCause());
141		} catch (Throwable fail) { threadUnexpectedException(fail); }
142
145	–	assertTrue(f.isDone());
143		assertFalse(f.isCancelled());
144	+	assertTrue(f.isDone());
145	+	assertTrue(f.isCompletedExceptionally());
146		assertTrue(f.toString().contains("[Completed exceptionally]"));
147		}
148
149	<	<U> void checkCompletedExceptionallyWithTimeout(CompletableFuture<U> f) {
150	<	long startTime = System.nanoTime();
151	<	long timeoutMillis = LONG_DELAY_MS;
152	<	try {
154	<	f.get(timeoutMillis, MILLISECONDS);
155	<	shouldThrow();
156	<	} catch (ExecutionException ex) {
157	<	assertTrue(ex.getCause() instanceof TimeoutException);
158	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
159	<	assertTrue(millisElapsedSince(startTime) < timeoutMillis/2);
160	<
161	<	try {
162	<	f.join();
163	<	shouldThrow();
164	<	} catch (Throwable ex) {
165	<	assertTrue(ex.getCause() instanceof TimeoutException);
166	<	}
167	<
168	<	try {
169	<	f.getNow(null);
170	<	shouldThrow();
171	<	} catch (Throwable ex) {
172	<	assertTrue(ex.getCause() instanceof TimeoutException);
173	<	}
149	>	void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
150	>	checkCompletedExceptionally(f, true,
151	>	(t) -> assertTrue(t instanceof CFException));
152	>	}
153
154	<	try {
155	<	f.get();
156	<	shouldThrow();
157	<	} catch (ExecutionException ex) {
179	<	assertTrue(ex.getCause() instanceof TimeoutException);
180	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
154	>	void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
155	>	checkCompletedExceptionally(f, true,
156	>	(t) -> assertTrue(t instanceof CancellationException));
157	>	}
158
159	<	assertTrue(f.isDone());
160	<	assertFalse(f.isCancelled());
161	<	assertTrue(f.toString().contains("[Completed exceptionally]"));
159	>	void checkCompletedWithTimeoutException(CompletableFuture<?> f) {
160	>	checkCompletedExceptionally(f, false,
161	>	(t) -> assertTrue(t instanceof TimeoutException));
162		}
163
164	<	<U> void checkCompletedWithWrappedException(CompletableFuture<U> f,
165	<	Throwable ex) {
166	<	checkCompletedExceptionallyWithRootCause(f, ex);
190	<	try {
191	<	CompletableFuture<Throwable> spy = f.handle
192	<	((U u, Throwable t) -> t);
193	<	assertTrue(spy.join() instanceof CompletionException);
194	<	assertSame(ex, spy.join().getCause());
195	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
164	>	void checkCompletedWithWrappedException(CompletableFuture<?> f,
165	>	Throwable ex) {
166	>	checkCompletedExceptionally(f, true, (t) -> assertSame(t, ex));
167		}
168
169	<	<U> void checkCompletedExceptionally(CompletableFuture<U> f, Throwable ex) {
170	<	checkCompletedExceptionallyWithRootCause(f, ex);
200	<	try {
201	<	CompletableFuture<Throwable> spy = f.handle
202	<	((U u, Throwable t) -> t);
203	<	assertSame(ex, spy.join());
204	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
169	>	void checkCompletedExceptionally(CompletableFuture<?> f, Throwable ex) {
170	>	checkCompletedExceptionally(f, false, (t) -> assertSame(t, ex));
171		}
172
173		void checkCancelled(CompletableFuture<?> f) {
174		long startTime = System.nanoTime();
209	–	long timeoutMillis = LONG_DELAY_MS;
175		try {
176	<	f.get(timeoutMillis, MILLISECONDS);
176	>	f.get(LONG_DELAY_MS, MILLISECONDS);
177		shouldThrow();
178		} catch (CancellationException success) {
179		} catch (Throwable fail) { threadUnexpectedException(fail); }
180	<	assertTrue(millisElapsedSince(startTime) < timeoutMillis/2);
180	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
181
182		try {
183		f.join();
#	Line 227 | Line 192 | public class CompletableFutureTest exten
192		shouldThrow();
193		} catch (CancellationException success) {
194		} catch (Throwable fail) { threadUnexpectedException(fail); }
230	–	assertTrue(f.isDone());
231	–	assertTrue(f.isCompletedExceptionally());
232	–	assertTrue(f.isCancelled());
233	–	assertTrue(f.toString().contains("[Completed exceptionally]"));
234	–	}
195
196	<	void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
237	<	long startTime = System.nanoTime();
238	<	long timeoutMillis = LONG_DELAY_MS;
239	<	try {
240	<	f.get(timeoutMillis, MILLISECONDS);
241	<	shouldThrow();
242	<	} catch (ExecutionException success) {
243	<	assertTrue(success.getCause() instanceof CancellationException);
244	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
245	<	assertTrue(millisElapsedSince(startTime) < timeoutMillis/2);
196	>	assertTrue(exceptionalCompletion(f) instanceof CancellationException);
197
247	–	try {
248	–	f.join();
249	–	shouldThrow();
250	–	} catch (CompletionException success) {
251	–	assertTrue(success.getCause() instanceof CancellationException);
252	–	}
253	–	try {
254	–	f.getNow(null);
255	–	shouldThrow();
256	–	} catch (CompletionException success) {
257	–	assertTrue(success.getCause() instanceof CancellationException);
258	–	}
259	–	try {
260	–	f.get();
261	–	shouldThrow();
262	–	} catch (ExecutionException success) {
263	–	assertTrue(success.getCause() instanceof CancellationException);
264	–	} catch (Throwable fail) { threadUnexpectedException(fail); }
198		assertTrue(f.isDone());
266	–	assertFalse(f.isCancelled());
199		assertTrue(f.isCompletedExceptionally());
200	+	assertTrue(f.isCancelled());
201		assertTrue(f.toString().contains("[Completed exceptionally]"));
202		}
203
#	Line 527 | Line 460 | public class CompletableFutureTest exten
460		class FailingSupplier extends CheckedAction
461		implements Supplier<Integer>
462		{
463	<	FailingSupplier(ExecutionMode m) { super(m); }
463	>	final CFException ex;
464	>	FailingSupplier(ExecutionMode m) { super(m); ex = new CFException(); }
465		public Integer get() {
466		invoked();
467	<	throw new CFException();
467	>	throw ex;
468		}
469		}
470
471		class FailingConsumer extends CheckedIntegerAction
472		implements Consumer<Integer>
473		{
474	<	FailingConsumer(ExecutionMode m) { super(m); }
474	>	final CFException ex;
475	>	FailingConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
476		public void accept(Integer x) {
477		invoked();
478		value = x;
479	<	throw new CFException();
479	>	throw ex;
480		}
481		}
482
483		class FailingBiConsumer extends CheckedIntegerAction
484		implements BiConsumer<Integer, Integer>
485		{
486	<	FailingBiConsumer(ExecutionMode m) { super(m); }
486	>	final CFException ex;
487	>	FailingBiConsumer(ExecutionMode m) { super(m); ex = new CFException(); }
488		public void accept(Integer x, Integer y) {
489		invoked();
490		value = subtract(x, y);
491	<	throw new CFException();
491	>	throw ex;
492		}
493		}
494
495		class FailingFunction extends CheckedIntegerAction
496		implements Function<Integer, Integer>
497		{
498	<	FailingFunction(ExecutionMode m) { super(m); }
498	>	final CFException ex;
499	>	FailingFunction(ExecutionMode m) { super(m); ex = new CFException(); }
500		public Integer apply(Integer x) {
501		invoked();
502		value = x;
503	<	throw new CFException();
503	>	throw ex;
504		}
505		}
506
507		class FailingBiFunction extends CheckedIntegerAction
508		implements BiFunction<Integer, Integer, Integer>
509		{
510	<	FailingBiFunction(ExecutionMode m) { super(m); }
510	>	final CFException ex;
511	>	FailingBiFunction(ExecutionMode m) { super(m); ex = new CFException(); }
512		public Integer apply(Integer x, Integer y) {
513		invoked();
514		value = subtract(x, y);
515	<	throw new CFException();
515	>	throw ex;
516		}
517		}
518
519		class FailingRunnable extends CheckedAction implements Runnable {
520	<	FailingRunnable(ExecutionMode m) { super(m); }
520	>	final CFException ex;
521	>	FailingRunnable(ExecutionMode m) { super(m); ex = new CFException(); }
522		public void run() {
523		invoked();
524	<	throw new CFException();
524	>	throw ex;
525		}
526		}
527
#	Line 602 | Line 541 | public class CompletableFutureTest exten
541		class FailingCompletableFutureFunction extends CheckedIntegerAction
542		implements Function<Integer, CompletableFuture<Integer>>
543		{
544	<	FailingCompletableFutureFunction(ExecutionMode m) { super(m); }
544	>	final CFException ex;
545	>	FailingCompletableFutureFunction(ExecutionMode m) { super(m); ex = new CFException(); }
546		public CompletableFuture<Integer> apply(Integer x) {
547		invoked();
548		value = x;
549	<	throw new CFException();
549	>	throw ex;
550	>	}
551	>	}
552	>
553	>	static class CountingRejectingExecutor implements Executor {
554	>	final RejectedExecutionException ex = new RejectedExecutionException();
555	>	final AtomicInteger count = new AtomicInteger(0);
556	>	public void execute(Runnable r) {
557	>	count.getAndIncrement();
558	>	throw ex;
559		}
560		}
561
#	Line 908 | Line 857 | public class CompletableFutureTest exten
857		if (!createIncomplete) assertTrue(f.complete(v1));
858		final CompletableFuture<Integer> g = f.exceptionally
859		((Throwable t) -> {
911	–	// Should not be called
860		a.getAndIncrement();
861	<	throw new AssertionError();
861	>	threadFail("should not be called");
862	>	return null;            // unreached
863		});
864		if (createIncomplete) assertTrue(f.complete(v1));
865
#	Line 944 | Line 893 | public class CompletableFutureTest exten
893		assertEquals(1, a.get());
894		}}
895
896	+	/**
897	+	* If an "exceptionally action" throws an exception, it completes
898	+	* exceptionally with that exception
899	+	*/
900		public void testExceptionally_exceptionalCompletionActionFailed() {
901		for (boolean createIncomplete : new boolean[] { true, false })
902		{
#	Line 962 | Line 915 | public class CompletableFutureTest exten
915		if (createIncomplete) f.completeExceptionally(ex1);
916
917		checkCompletedWithWrappedException(g, ex2);
918	+	checkCompletedExceptionally(f, ex1);
919		assertEquals(1, a.get());
920		}}
921
#	Line 969 | Line 923 | public class CompletableFutureTest exten
923		* whenComplete action executes on normal completion, propagating
924		* source result.
925		*/
926	<	public void testWhenComplete_normalCompletion1() {
926	>	public void testWhenComplete_normalCompletion() {
927		for (ExecutionMode m : ExecutionMode.values())
928		for (boolean createIncomplete : new boolean[] { true, false })
929		for (Integer v1 : new Integer[] { 1, null })
#	Line 979 | Line 933 | public class CompletableFutureTest exten
933		if (!createIncomplete) assertTrue(f.complete(v1));
934		final CompletableFuture<Integer> g = m.whenComplete
935		(f,
936	<	(Integer x, Throwable t) -> {
936	>	(Integer result, Throwable t) -> {
937		m.checkExecutionMode();
938	<	threadAssertSame(x, v1);
938	>	threadAssertSame(result, v1);
939		threadAssertNull(t);
940		a.getAndIncrement();
941		});
#	Line 1006 | Line 960 | public class CompletableFutureTest exten
960		if (!createIncomplete) f.completeExceptionally(ex);
961		final CompletableFuture<Integer> g = m.whenComplete
962		(f,
963	<	(Integer x, Throwable t) -> {
963	>	(Integer result, Throwable t) -> {
964		m.checkExecutionMode();
965	<	threadAssertNull(x);
965	>	threadAssertNull(result);
966		threadAssertSame(t, ex);
967		a.getAndIncrement();
968		});
#	Line 1033 | Line 987 | public class CompletableFutureTest exten
987		if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
988		final CompletableFuture<Integer> g = m.whenComplete
989		(f,
990	<	(Integer x, Throwable t) -> {
990	>	(Integer result, Throwable t) -> {
991		m.checkExecutionMode();
992	<	threadAssertNull(x);
992	>	threadAssertNull(result);
993		threadAssertTrue(t instanceof CancellationException);
994		a.getAndIncrement();
995		});
#	Line 1050 | Line 1004 | public class CompletableFutureTest exten
1004		* If a whenComplete action throws an exception when triggered by
1005		* a normal completion, it completes exceptionally
1006		*/
1007	<	public void testWhenComplete_actionFailed() {
1007	>	public void testWhenComplete_sourceCompletedNormallyActionFailed() {
1008		for (boolean createIncomplete : new boolean[] { true, false })
1009		for (ExecutionMode m : ExecutionMode.values())
1010		for (Integer v1 : new Integer[] { 1, null })
#	Line 1061 | Line 1015 | public class CompletableFutureTest exten
1015		if (!createIncomplete) assertTrue(f.complete(v1));
1016		final CompletableFuture<Integer> g = m.whenComplete
1017		(f,
1018	<	(Integer x, Throwable t) -> {
1018	>	(Integer result, Throwable t) -> {
1019		m.checkExecutionMode();
1020	<	threadAssertSame(x, v1);
1020	>	threadAssertSame(result, v1);
1021		threadAssertNull(t);
1022		a.getAndIncrement();
1023		throw ex;
#	Line 1078 | Line 1032 | public class CompletableFutureTest exten
1032		/**
1033		* If a whenComplete action throws an exception when triggered by
1034		* a source completion that also throws an exception, the source
1035	<	* exception takes precedence.
1035	>	* exception takes precedence (unlike handle)
1036		*/
1037	<	public void testWhenComplete_actionFailedSourceFailed() {
1037	>	public void testWhenComplete_sourceFailedActionFailed() {
1038		for (boolean createIncomplete : new boolean[] { true, false })
1039		for (ExecutionMode m : ExecutionMode.values())
1040		{
#	Line 1092 | Line 1046 | public class CompletableFutureTest exten
1046		if (!createIncomplete) f.completeExceptionally(ex1);
1047		final CompletableFuture<Integer> g = m.whenComplete
1048		(f,
1049	<	(Integer x, Throwable t) -> {
1049	>	(Integer result, Throwable t) -> {
1050		m.checkExecutionMode();
1051		threadAssertSame(t, ex1);
1052	<	threadAssertNull(x);
1052	>	threadAssertNull(result);
1053		a.getAndIncrement();
1054		throw ex2;
1055		});
#	Line 1103 | Line 1057 | public class CompletableFutureTest exten
1057
1058		checkCompletedWithWrappedException(g, ex1);
1059		checkCompletedExceptionally(f, ex1);
1060	+	if (testImplementationDetails) {
1061	+	assertEquals(1, ex1.getSuppressed().length);
1062	+	assertSame(ex2, ex1.getSuppressed()[0]);
1063	+	}
1064		assertEquals(1, a.get());
1065		}}
1066
#	Line 1120 | Line 1078 | public class CompletableFutureTest exten
1078		if (!createIncomplete) assertTrue(f.complete(v1));
1079		final CompletableFuture<Integer> g = m.handle
1080		(f,
1081	<	(Integer x, Throwable t) -> {
1081	>	(Integer result, Throwable t) -> {
1082		m.checkExecutionMode();
1083	<	threadAssertSame(x, v1);
1083	>	threadAssertSame(result, v1);
1084		threadAssertNull(t);
1085		a.getAndIncrement();
1086		return inc(v1);
#	Line 1149 | Line 1107 | public class CompletableFutureTest exten
1107		if (!createIncomplete) f.completeExceptionally(ex);
1108		final CompletableFuture<Integer> g = m.handle
1109		(f,
1110	<	(Integer x, Throwable t) -> {
1110	>	(Integer result, Throwable t) -> {
1111		m.checkExecutionMode();
1112	<	threadAssertNull(x);
1112	>	threadAssertNull(result);
1113		threadAssertSame(t, ex);
1114		a.getAndIncrement();
1115		return v1;
#	Line 1178 | Line 1136 | public class CompletableFutureTest exten
1136		if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1137		final CompletableFuture<Integer> g = m.handle
1138		(f,
1139	<	(Integer x, Throwable t) -> {
1139	>	(Integer result, Throwable t) -> {
1140		m.checkExecutionMode();
1141	<	threadAssertNull(x);
1141	>	threadAssertNull(result);
1142		threadAssertTrue(t instanceof CancellationException);
1143		a.getAndIncrement();
1144		return v1;
#	Line 1193 | Line 1151 | public class CompletableFutureTest exten
1151		}}
1152
1153		/**
1154	<	* handle result completes exceptionally if action does
1154	>	* If a "handle action" throws an exception when triggered by
1155	>	* a normal completion, it completes exceptionally
1156		*/
1157	<	public void testHandle_sourceFailedActionFailed() {
1157	>	public void testHandle_sourceCompletedNormallyActionFailed() {
1158		for (ExecutionMode m : ExecutionMode.values())
1159		for (boolean createIncomplete : new boolean[] { true, false })
1160	+	for (Integer v1 : new Integer[] { 1, null })
1161		{
1162		final CompletableFuture<Integer> f = new CompletableFuture<>();
1163		final AtomicInteger a = new AtomicInteger(0);
1164	<	final CFException ex1 = new CFException();
1165	<	final CFException ex2 = new CFException();
1206	<	if (!createIncomplete) f.completeExceptionally(ex1);
1164	>	final CFException ex = new CFException();
1165	>	if (!createIncomplete) assertTrue(f.complete(v1));
1166		final CompletableFuture<Integer> g = m.handle
1167		(f,
1168	<	(Integer x, Throwable t) -> {
1168	>	(Integer result, Throwable t) -> {
1169		m.checkExecutionMode();
1170	<	threadAssertNull(x);
1171	<	threadAssertSame(ex1, t);
1170	>	threadAssertSame(result, v1);
1171	>	threadAssertNull(t);
1172		a.getAndIncrement();
1173	<	throw ex2;
1173	>	throw ex;
1174		});
1175	<	if (createIncomplete) f.completeExceptionally(ex1);
1175	>	if (createIncomplete) assertTrue(f.complete(v1));
1176
1177	<	checkCompletedWithWrappedException(g, ex2);
1178	<	checkCompletedExceptionally(f, ex1);
1177	>	checkCompletedWithWrappedException(g, ex);
1178	>	checkCompletedNormally(f, v1);
1179		assertEquals(1, a.get());
1180		}}
1181
1182	<	public void testHandle_sourceCompletedNormallyActionFailed() {
1183	<	for (ExecutionMode m : ExecutionMode.values())
1182	>	/**
1183	>	* If a "handle action" throws an exception when triggered by
1184	>	* a source completion that also throws an exception, the action
1185	>	* exception takes precedence (unlike whenComplete)
1186	>	*/
1187	>	public void testHandle_sourceFailedActionFailed() {
1188		for (boolean createIncomplete : new boolean[] { true, false })
1189	<	for (Integer v1 : new Integer[] { 1, null })
1189	>	for (ExecutionMode m : ExecutionMode.values())
1190		{
1228	–	final CompletableFuture<Integer> f = new CompletableFuture<>();
1191		final AtomicInteger a = new AtomicInteger(0);
1192	<	final CFException ex = new CFException();
1193	<	if (!createIncomplete) assertTrue(f.complete(v1));
1192	>	final CFException ex1 = new CFException();
1193	>	final CFException ex2 = new CFException();
1194	>	final CompletableFuture<Integer> f = new CompletableFuture<>();
1195	>
1196	>	if (!createIncomplete) f.completeExceptionally(ex1);
1197		final CompletableFuture<Integer> g = m.handle
1198		(f,
1199	<	(Integer x, Throwable t) -> {
1199	>	(Integer result, Throwable t) -> {
1200		m.checkExecutionMode();
1201	<	threadAssertSame(x, v1);
1202	<	threadAssertNull(t);
1201	>	threadAssertNull(result);
1202	>	threadAssertSame(ex1, t);
1203		a.getAndIncrement();
1204	<	throw ex;
1204	>	throw ex2;
1205		});
1206	<	if (createIncomplete) assertTrue(f.complete(v1));
1206	>	if (createIncomplete) f.completeExceptionally(ex1);
1207
1208	<	checkCompletedWithWrappedException(g, ex);
1209	<	checkCompletedNormally(f, v1);
1208	>	checkCompletedWithWrappedException(g, ex2);
1209	>	checkCompletedExceptionally(f, ex1);
1210		assertEquals(1, a.get());
1211		}}
1212
#	Line 1274 | Line 1239 | public class CompletableFutureTest exten
1239		{
1240		final FailingRunnable r = new FailingRunnable(m);
1241		final CompletableFuture<Void> f = m.runAsync(r);
1242	<	checkCompletedWithWrappedCFException(f);
1242	>	checkCompletedWithWrappedException(f, r.ex);
1243		r.assertInvoked();
1244		}}
1245
1246	+	public void testRunAsync_rejectingExecutor() {
1247	+	CountingRejectingExecutor e = new CountingRejectingExecutor();
1248	+	try {
1249	+	CompletableFuture.runAsync(() -> {}, e);
1250	+	shouldThrow();
1251	+	} catch (Throwable t) {
1252	+	assertSame(e.ex, t);
1253	+	}
1254	+
1255	+	assertEquals(1, e.count.get());
1256	+	}
1257	+
1258		/**
1259		* supplyAsync completes with result of supplier
1260		*/
#	Line 1308 | Line 1285 | public class CompletableFutureTest exten
1285		{
1286		FailingSupplier r = new FailingSupplier(m);
1287		CompletableFuture<Integer> f = m.supplyAsync(r);
1288	<	checkCompletedWithWrappedCFException(f);
1288	>	checkCompletedWithWrappedException(f, r.ex);
1289		r.assertInvoked();
1290		}}
1291
1292	+	public void testSupplyAsync_rejectingExecutor() {
1293	+	CountingRejectingExecutor e = new CountingRejectingExecutor();
1294	+	try {
1295	+	CompletableFuture.supplyAsync(() -> null, e);
1296	+	shouldThrow();
1297	+	} catch (Throwable t) {
1298	+	assertSame(e.ex, t);
1299	+	}
1300	+
1301	+	assertEquals(1, e.count.get());
1302	+	}
1303	+
1304		// seq completion methods
1305
1306		/**
#	Line 1430 | Line 1419 | public class CompletableFutureTest exten
1419		final CompletableFuture<Void> h4 = m.runAfterBoth(f, f, rs[4]);
1420		final CompletableFuture<Void> h5 = m.runAfterEither(f, f, rs[5]);
1421
1422	<	checkCompletedWithWrappedCFException(h0);
1423	<	checkCompletedWithWrappedCFException(h1);
1424	<	checkCompletedWithWrappedCFException(h2);
1425	<	checkCompletedWithWrappedCFException(h3);
1426	<	checkCompletedWithWrappedCFException(h4);
1427	<	checkCompletedWithWrappedCFException(h5);
1422	>	checkCompletedWithWrappedException(h0, rs[0].ex);
1423	>	checkCompletedWithWrappedException(h1, rs[1].ex);
1424	>	checkCompletedWithWrappedException(h2, rs[2].ex);
1425	>	checkCompletedWithWrappedException(h3, rs[3].ex);
1426	>	checkCompletedWithWrappedException(h4, rs[4].ex);
1427	>	checkCompletedWithWrappedException(h5, rs[5].ex);
1428		checkCompletedNormally(f, v1);
1429		}}
1430
#	Line 1534 | Line 1523 | public class CompletableFutureTest exten
1523		final CompletableFuture<Integer> h2 = m.thenApply(f, rs[2]);
1524		final CompletableFuture<Integer> h3 = m.applyToEither(f, f, rs[3]);
1525
1526	<	checkCompletedWithWrappedCFException(h0);
1527	<	checkCompletedWithWrappedCFException(h1);
1528	<	checkCompletedWithWrappedCFException(h2);
1529	<	checkCompletedWithWrappedCFException(h3);
1526	>	checkCompletedWithWrappedException(h0, rs[0].ex);
1527	>	checkCompletedWithWrappedException(h1, rs[1].ex);
1528	>	checkCompletedWithWrappedException(h2, rs[2].ex);
1529	>	checkCompletedWithWrappedException(h3, rs[3].ex);
1530		checkCompletedNormally(f, v1);
1531		}}
1532
#	Line 1636 | Line 1625 | public class CompletableFutureTest exten
1625		final CompletableFuture<Void> h2 = m.thenAccept(f, rs[2]);
1626		final CompletableFuture<Void> h3 = m.acceptEither(f, f, rs[3]);
1627
1628	<	checkCompletedWithWrappedCFException(h0);
1629	<	checkCompletedWithWrappedCFException(h1);
1630	<	checkCompletedWithWrappedCFException(h2);
1631	<	checkCompletedWithWrappedCFException(h3);
1628	>	checkCompletedWithWrappedException(h0, rs[0].ex);
1629	>	checkCompletedWithWrappedException(h1, rs[1].ex);
1630	>	checkCompletedWithWrappedException(h2, rs[2].ex);
1631	>	checkCompletedWithWrappedException(h3, rs[3].ex);
1632		checkCompletedNormally(f, v1);
1633		}}
1634
#	Line 1801 | Line 1790 | public class CompletableFutureTest exten
1790		assertTrue(snd.complete(w2));
1791		final CompletableFuture<Integer> h3 = m.thenCombine(f, g, r3);
1792
1793	<	checkCompletedWithWrappedCFException(h1);
1794	<	checkCompletedWithWrappedCFException(h2);
1795	<	checkCompletedWithWrappedCFException(h3);
1793	>	checkCompletedWithWrappedException(h1, r1.ex);
1794	>	checkCompletedWithWrappedException(h2, r2.ex);
1795	>	checkCompletedWithWrappedException(h3, r3.ex);
1796		r1.assertInvoked();
1797		r2.assertInvoked();
1798		r3.assertInvoked();
#	Line 1965 | Line 1954 | public class CompletableFutureTest exten
1954		assertTrue(snd.complete(w2));
1955		final CompletableFuture<Void> h3 = m.thenAcceptBoth(f, g, r3);
1956
1957	<	checkCompletedWithWrappedCFException(h1);
1958	<	checkCompletedWithWrappedCFException(h2);
1959	<	checkCompletedWithWrappedCFException(h3);
1957	>	checkCompletedWithWrappedException(h1, r1.ex);
1958	>	checkCompletedWithWrappedException(h2, r2.ex);
1959	>	checkCompletedWithWrappedException(h3, r3.ex);
1960		r1.assertInvoked();
1961		r2.assertInvoked();
1962		r3.assertInvoked();
#	Line 2129 | Line 2118 | public class CompletableFutureTest exten
2118		assertTrue(snd.complete(w2));
2119		final CompletableFuture<Void> h3 = m.runAfterBoth(f, g, r3);
2120
2121	<	checkCompletedWithWrappedCFException(h1);
2122	<	checkCompletedWithWrappedCFException(h2);
2123	<	checkCompletedWithWrappedCFException(h3);
2121	>	checkCompletedWithWrappedException(h1, r1.ex);
2122	>	checkCompletedWithWrappedException(h2, r2.ex);
2123	>	checkCompletedWithWrappedException(h3, r3.ex);
2124		r1.assertInvoked();
2125		r2.assertInvoked();
2126		r3.assertInvoked();
#	Line 2421 | Line 2410 | public class CompletableFutureTest exten
2410		f.complete(v1);
2411		final CompletableFuture<Integer> h2 = m.applyToEither(f, g, rs[2]);
2412		final CompletableFuture<Integer> h3 = m.applyToEither(g, f, rs[3]);
2413	<	checkCompletedWithWrappedCFException(h0);
2414	<	checkCompletedWithWrappedCFException(h1);
2415	<	checkCompletedWithWrappedCFException(h2);
2416	<	checkCompletedWithWrappedCFException(h3);
2413	>	checkCompletedWithWrappedException(h0, rs[0].ex);
2414	>	checkCompletedWithWrappedException(h1, rs[1].ex);
2415	>	checkCompletedWithWrappedException(h2, rs[2].ex);
2416	>	checkCompletedWithWrappedException(h3, rs[3].ex);
2417		for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2418
2419		g.complete(v2);
#	Line 2433 | Line 2422 | public class CompletableFutureTest exten
2422		final CompletableFuture<Integer> h4 = m.applyToEither(f, g, rs[4]);
2423		final CompletableFuture<Integer> h5 = m.applyToEither(g, f, rs[5]);
2424
2425	<	checkCompletedWithWrappedCFException(h4);
2425	>	checkCompletedWithWrappedException(h4, rs[4].ex);
2426		assertTrue(Objects.equals(v1, rs[4].value) ||
2427		Objects.equals(v2, rs[4].value));
2428	<	checkCompletedWithWrappedCFException(h5);
2428	>	checkCompletedWithWrappedException(h5, rs[5].ex);
2429		assertTrue(Objects.equals(v1, rs[5].value) ||
2430		Objects.equals(v2, rs[5].value));
2431
#	Line 2680 | Line 2669 | public class CompletableFutureTest exten
2669		f.complete(v1);
2670		final CompletableFuture<Void> h2 = m.acceptEither(f, g, rs[2]);
2671		final CompletableFuture<Void> h3 = m.acceptEither(g, f, rs[3]);
2672	<	checkCompletedWithWrappedCFException(h0);
2673	<	checkCompletedWithWrappedCFException(h1);
2674	<	checkCompletedWithWrappedCFException(h2);
2675	<	checkCompletedWithWrappedCFException(h3);
2672	>	checkCompletedWithWrappedException(h0, rs[0].ex);
2673	>	checkCompletedWithWrappedException(h1, rs[1].ex);
2674	>	checkCompletedWithWrappedException(h2, rs[2].ex);
2675	>	checkCompletedWithWrappedException(h3, rs[3].ex);
2676		for (int i = 0; i < 4; i++) rs[i].assertValue(v1);
2677
2678		g.complete(v2);
#	Line 2692 | Line 2681 | public class CompletableFutureTest exten
2681		final CompletableFuture<Void> h4 = m.acceptEither(f, g, rs[4]);
2682		final CompletableFuture<Void> h5 = m.acceptEither(g, f, rs[5]);
2683
2684	<	checkCompletedWithWrappedCFException(h4);
2684	>	checkCompletedWithWrappedException(h4, rs[4].ex);
2685		assertTrue(Objects.equals(v1, rs[4].value) ||
2686		Objects.equals(v2, rs[4].value));
2687	<	checkCompletedWithWrappedCFException(h5);
2687	>	checkCompletedWithWrappedException(h5, rs[5].ex);
2688		assertTrue(Objects.equals(v1, rs[5].value) ||
2689		Objects.equals(v2, rs[5].value));
2690
#	Line 2935 | 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 3005 | 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 3114 | 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 3142 | Line 3131 | public class CompletableFutureTest exten
3131		for (int i = 0; i < k; i++) {
3132		checkIncomplete(f);
3133		checkIncomplete(CompletableFuture.allOf(fs));
3134	<	if (i != k/2) {
3134	>	if (i != k / 2) {
3135		fs[i].complete(i);
3136		checkCompletedNormally(fs[i], i);
3137		} else {
#	Line 3347 | Line 3336 | public class CompletableFutureTest exten
3336		() -> f.obtrudeException(null),
3337
3338		() -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3339	<	() -> CompletableFuture.delayedExecutor(1L, null, new ThreadExecutor()),
3339	>	() -> CompletableFuture.delayedExecutor(1L, null, exec),
3340		() -> CompletableFuture.delayedExecutor(1L, null),
3341
3342		() -> f.orTimeout(1L, null),
3343		() -> f.completeOnTimeout(42, 1L, null),
3344	+
3345	+	() -> CompletableFuture.failedFuture(null),
3346	+	() -> CompletableFuture.failedStage(null),
3347		};
3348
3349		assertThrows(NullPointerException.class, throwingActions);
#	Line 3359 | Line 3351 | public class CompletableFutureTest exten
3351		}
3352
3353		/**
3354	+	* Test submissions to an executor that rejects all tasks.
3355	+	*/
3356	+	public void testRejectingExecutor() {
3357	+	for (Integer v : new Integer[] { 1, null }) {
3358	+
3359	+	final CountingRejectingExecutor e = new CountingRejectingExecutor();
3360	+
3361	+	final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3362	+	final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3363	+
3364	+	List<CompletableFuture<?>> futures = new ArrayList<>();
3365	+
3366	+	List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3367	+	srcs.add(complete);
3368	+	srcs.add(incomplete);
3369	+
3370	+	for (CompletableFuture<Integer> src : srcs) {
3371	+	List<CompletableFuture<?>> fs = new ArrayList<>();
3372	+	fs.add(src.thenRunAsync(() -> {}, e));
3373	+	fs.add(src.thenAcceptAsync((z) -> {}, e));
3374	+	fs.add(src.thenApplyAsync((z) -> z, e));
3375	+
3376	+	fs.add(src.thenCombineAsync(src, (x, y) -> x, e));
3377	+	fs.add(src.thenAcceptBothAsync(src, (x, y) -> {}, e));
3378	+	fs.add(src.runAfterBothAsync(src, () -> {}, e));
3379	+
3380	+	fs.add(src.applyToEitherAsync(src, (z) -> z, e));
3381	+	fs.add(src.acceptEitherAsync(src, (z) -> {}, e));
3382	+	fs.add(src.runAfterEitherAsync(src, () -> {}, e));
3383	+
3384	+	fs.add(src.thenComposeAsync((z) -> null, e));
3385	+	fs.add(src.whenCompleteAsync((z, t) -> {}, e));
3386	+	fs.add(src.handleAsync((z, t) -> null, e));
3387	+
3388	+	for (CompletableFuture<?> future : fs) {
3389	+	if (src.isDone())
3390	+	checkCompletedWithWrappedException(future, e.ex);
3391	+	else
3392	+	checkIncomplete(future);
3393	+	}
3394	+	futures.addAll(fs);
3395	+	}
3396	+
3397	+	{
3398	+	List<CompletableFuture<?>> fs = new ArrayList<>();
3399	+
3400	+	fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3401	+	fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3402	+
3403	+	fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3404	+	fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3405	+
3406	+	fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3407	+	fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3408	+
3409	+	for (CompletableFuture<?> future : fs)
3410	+	checkIncomplete(future);
3411	+	futures.addAll(fs);
3412	+	}
3413	+
3414	+	{
3415	+	List<CompletableFuture<?>> fs = new ArrayList<>();
3416	+
3417	+	fs.add(complete.applyToEitherAsync(incomplete, (z) -> z, e));
3418	+	fs.add(incomplete.applyToEitherAsync(complete, (z) -> z, e));
3419	+
3420	+	fs.add(complete.acceptEitherAsync(incomplete, (z) -> {}, e));
3421	+	fs.add(incomplete.acceptEitherAsync(complete, (z) -> {}, e));
3422	+
3423	+	fs.add(complete.runAfterEitherAsync(incomplete, () -> {}, e));
3424	+	fs.add(incomplete.runAfterEitherAsync(complete, () -> {}, e));
3425	+
3426	+	for (CompletableFuture<?> future : fs)
3427	+	checkCompletedWithWrappedException(future, e.ex);
3428	+	futures.addAll(fs);
3429	+	}
3430	+
3431	+	incomplete.complete(v);
3432	+
3433	+	for (CompletableFuture<?> future : futures)
3434	+	checkCompletedWithWrappedException(future, e.ex);
3435	+
3436	+	assertEquals(futures.size(), e.count.get());
3437	+
3438	+	}
3439	+	}
3440	+
3441	+	/**
3442	+	* Test submissions to an executor that rejects all tasks, but
3443	+	* should never be invoked because the dependent future is
3444	+	* explicitly completed.
3445	+	*/
3446	+	public void testRejectingExecutorNeverInvoked() {
3447	+	final CountingRejectingExecutor e = new CountingRejectingExecutor();
3448	+
3449	+	for (Integer v : new Integer[] { 1, null }) {
3450	+
3451	+	final CompletableFuture<Integer> complete = CompletableFuture.completedFuture(v);
3452	+	final CompletableFuture<Integer> incomplete = new CompletableFuture<>();
3453	+
3454	+	List<CompletableFuture<?>> futures = new ArrayList<>();
3455	+
3456	+	List<CompletableFuture<Integer>> srcs = new ArrayList<>();
3457	+	srcs.add(complete);
3458	+	srcs.add(incomplete);
3459	+
3460	+	List<CompletableFuture<?>> fs = new ArrayList<>();
3461	+	fs.add(incomplete.thenRunAsync(() -> {}, e));
3462	+	fs.add(incomplete.thenAcceptAsync((z) -> {}, e));
3463	+	fs.add(incomplete.thenApplyAsync((z) -> z, e));
3464	+
3465	+	fs.add(incomplete.thenCombineAsync(incomplete, (x, y) -> x, e));
3466	+	fs.add(incomplete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3467	+	fs.add(incomplete.runAfterBothAsync(incomplete, () -> {}, e));
3468	+
3469	+	fs.add(incomplete.applyToEitherAsync(incomplete, (z) -> z, e));
3470	+	fs.add(incomplete.acceptEitherAsync(incomplete, (z) -> {}, e));
3471	+	fs.add(incomplete.runAfterEitherAsync(incomplete, () -> {}, e));
3472	+
3473	+	fs.add(incomplete.thenComposeAsync((z) -> null, e));
3474	+	fs.add(incomplete.whenCompleteAsync((z, t) -> {}, e));
3475	+	fs.add(incomplete.handleAsync((z, t) -> null, e));
3476	+
3477	+	fs.add(complete.thenCombineAsync(incomplete, (x, y) -> x, e));
3478	+	fs.add(incomplete.thenCombineAsync(complete, (x, y) -> x, e));
3479	+
3480	+	fs.add(complete.thenAcceptBothAsync(incomplete, (x, y) -> {}, e));
3481	+	fs.add(incomplete.thenAcceptBothAsync(complete, (x, y) -> {}, e));
3482	+
3483	+	fs.add(complete.runAfterBothAsync(incomplete, () -> {}, e));
3484	+	fs.add(incomplete.runAfterBothAsync(complete, () -> {}, e));
3485	+
3486	+	for (CompletableFuture<?> future : fs)
3487	+	checkIncomplete(future);
3488	+
3489	+	for (CompletableFuture<?> future : fs)
3490	+	future.complete(null);
3491	+
3492	+	incomplete.complete(v);
3493	+
3494	+	for (CompletableFuture<?> future : fs)
3495	+	checkCompletedNormally(future, null);
3496	+
3497	+	assertEquals(0, e.count.get());
3498	+
3499	+	}
3500	+	}
3501	+
3502	+	/**
3503		* toCompletableFuture returns this CompletableFuture.
3504		*/
3505		public void testToCompletableFuture() {
#	Line 3390 | Line 3531 | public class CompletableFutureTest exten
3531		* completedStage returns a completed CompletionStage
3532		*/
3533		public void testCompletedStage() {
3534	<	AtomicInteger x = new AtomicInteger();
3534	>	AtomicInteger x = new AtomicInteger(0);
3535		AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3536		CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3537		f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
#	Line 3419 | Line 3560 | public class CompletableFutureTest exten
3560		public void testFailedFuture() {
3561		CFException ex = new CFException();
3562		CompletableFuture<Integer> f = CompletableFuture.failedFuture(ex);
3563	<	checkCompletedExceptionallyWithRootCause(f, ex);
3563	>	checkCompletedExceptionally(f, ex);
3564		}
3565
3566		/**
#	Line 3458 | Line 3599 | public class CompletableFutureTest exten
3599		CFException ex = new CFException();
3600		f.completeExceptionally(ex);
3601		checkCompletedExceptionally(f, ex);
3602	<	checkCompletedWithWrappedCFException(g);
3602	>	checkCompletedWithWrappedException(g, ex);
3603		}
3604
3605		/**
#	Line 3468 | Line 3609 | public class CompletableFutureTest exten
3609		public void testMinimalCompletionStage() {
3610		CompletableFuture<Integer> f = new CompletableFuture<>();
3611		CompletionStage<Integer> g = f.minimalCompletionStage();
3612	<	AtomicInteger x = new AtomicInteger();
3612	>	AtomicInteger x = new AtomicInteger(0);
3613		AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3614		checkIncomplete(f);
3615		g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
#	Line 3485 | Line 3626 | public class CompletableFutureTest exten
3626		public void testMinimalCompletionStage2() {
3627		CompletableFuture<Integer> f = new CompletableFuture<>();
3628		CompletionStage<Integer> g = f.minimalCompletionStage();
3629	<	AtomicInteger x = new AtomicInteger();
3629	>	AtomicInteger x = new AtomicInteger(0);
3630		AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3631		g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3632		checkIncomplete(f);
#	Line 3503 | Line 3644 | public class CompletableFutureTest exten
3644		public void testFailedStage() {
3645		CFException ex = new CFException();
3646		CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3647	<	AtomicInteger x = new AtomicInteger();
3647	>	AtomicInteger x = new AtomicInteger(0);
3648		AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3649		f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3650		assertEquals(x.get(), 0);
3651	<	assertEquals(r.get().getCause(), ex);
3651	>	assertEquals(r.get(), ex);
3652		}
3653
3654		/**
3655		* completeAsync completes with value of given supplier
3656		*/
3657		public void testCompleteAsync() {
3658	+	for (Integer v1 : new Integer[] { 1, null })
3659	+	{
3660		CompletableFuture<Integer> f = new CompletableFuture<>();
3661	<	f.completeAsync(() -> 1);
3661	>	f.completeAsync(() -> v1);
3662		f.join();
3663	<	checkCompletedNormally(f, 1);
3664	<	}
3663	>	checkCompletedNormally(f, v1);
3664	>	}}
3665
3666		/**
3667		* completeAsync completes exceptionally if given supplier throws
#	Line 3530 | Line 3673 | public class CompletableFutureTest exten
3673		try {
3674		f.join();
3675		shouldThrow();
3676	<	} catch (Exception success) {}
3677	<	checkCompletedWithWrappedCFException(f);
3676	>	} catch (CompletionException success) {}
3677	>	checkCompletedWithWrappedException(f, ex);
3678		}
3679
3680		/**
3681		* completeAsync with given executor completes with value of given supplier
3682		*/
3683		public void testCompleteAsync3() {
3684	+	for (Integer v1 : new Integer[] { 1, null })
3685	+	{
3686		CompletableFuture<Integer> f = new CompletableFuture<>();
3687	<	f.completeAsync(() -> 1, new ThreadExecutor());
3688	<	f.join();
3689	<	checkCompletedNormally(f, 1);
3690	<	}
3687	>	ThreadExecutor executor = new ThreadExecutor();
3688	>	f.completeAsync(() -> v1, executor);
3689	>	assertSame(v1, f.join());
3690	>	checkCompletedNormally(f, v1);
3691	>	assertEquals(1, executor.count.get());
3692	>	}}
3693
3694		/**
3695		* completeAsync with given executor completes exceptionally if
#	Line 3551 | Line 3698 | public class CompletableFutureTest exten
3698		public void testCompleteAsync4() {
3699		CompletableFuture<Integer> f = new CompletableFuture<>();
3700		CFException ex = new CFException();
3701	<	f.completeAsync(() -> {if (true) throw ex; return 1;}, new ThreadExecutor());
3701	>	ThreadExecutor executor = new ThreadExecutor();
3702	>	f.completeAsync(() -> {if (true) throw ex; return 1;}, executor);
3703		try {
3704		f.join();
3705		shouldThrow();
3706	<	} catch (Exception success) {}
3707	<	checkCompletedWithWrappedCFException(f);
3706	>	} catch (CompletionException success) {}
3707	>	checkCompletedWithWrappedException(f, ex);
3708	>	assertEquals(1, executor.count.get());
3709		}
3710
3711		/**
3712		* orTimeout completes with TimeoutException if not complete
3713		*/
3714	<	public void testOrTimeout() {
3714	>	public void testOrTimeout_timesOut() {
3715	>	long timeoutMillis = timeoutMillis();
3716		CompletableFuture<Integer> f = new CompletableFuture<>();
3717	<	f.orTimeout(SHORT_DELAY_MS, MILLISECONDS);
3718	<	checkCompletedExceptionallyWithTimeout(f);
3717	>	long startTime = System.nanoTime();
3718	>	assertSame(f, f.orTimeout(timeoutMillis, MILLISECONDS));
3719	>	checkCompletedWithTimeoutException(f);
3720	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3721		}
3722
3723		/**
3724		* orTimeout completes normally if completed before timeout
3725		*/
3726	<	public void testOrTimeout2() {
3726	>	public void testOrTimeout_completed() {
3727	>	for (Integer v1 : new Integer[] { 1, null })
3728	>	{
3729		CompletableFuture<Integer> f = new CompletableFuture<>();
3730	<	f.complete(1);
3731	<	f.orTimeout(SHORT_DELAY_MS, MILLISECONDS);
3732	<	checkCompletedNormally(f, 1);
3733	<	}
3730	>	CompletableFuture<Integer> g = new CompletableFuture<>();
3731	>	long startTime = System.nanoTime();
3732	>	f.complete(v1);
3733	>	assertSame(f, f.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3734	>	assertSame(g, g.orTimeout(LONG_DELAY_MS, MILLISECONDS));
3735	>	g.complete(v1);
3736	>	checkCompletedNormally(f, v1);
3737	>	checkCompletedNormally(g, v1);
3738	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3739	>	}}
3740
3741		/**
3742		* completeOnTimeout completes with given value if not complete
3743		*/
3744	<	public void testCompleteOnTimeout() {
3745	<	CompletableFuture<Integer> f = new CompletableFuture<>();
3746	<	f.completeOnTimeout(-1, SHORT_DELAY_MS, MILLISECONDS);
3587	<	f.join();
3588	<	checkCompletedNormally(f, -1);
3744	>	public void testCompleteOnTimeout_timesOut() {
3745	>	testInParallel(() -> testCompleteOnTimeout_timesOut(42),
3746	>	() -> testCompleteOnTimeout_timesOut(null));
3747		}
3748
3749		/**
3750	<	* completeOnTimeout has no effect if completed within timeout
3750	>	* completeOnTimeout completes with given value if not complete
3751		*/
3752	<	public void testCompleteOnTimeout2() {
3752	>	public void testCompleteOnTimeout_timesOut(Integer v) {
3753	>	long timeoutMillis = timeoutMillis();
3754		CompletableFuture<Integer> f = new CompletableFuture<>();
3755	<	f.complete(1);
3756	<	f.completeOnTimeout(-1, SHORT_DELAY_MS, MILLISECONDS);
3757	<	checkCompletedNormally(f, 1);
3755	>	long startTime = System.nanoTime();
3756	>	assertSame(f, f.completeOnTimeout(v, timeoutMillis, MILLISECONDS));
3757	>	assertSame(v, f.join());
3758	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3759	>	f.complete(99);         // should have no effect
3760	>	checkCompletedNormally(f, v);
3761		}
3762
3763		/**
3764	<	* delayedExecutor returns an executor that delays submission
3764	>	* completeOnTimeout has no effect if completed within timeout
3765		*/
3766	<	public void testDelayedExecutor() throws Exception {
3767	<	long timeoutMillis = SMALL_DELAY_MS;
3768	<	Executor d = CompletableFuture.delayedExecutor(timeoutMillis,
3769	<	MILLISECONDS);
3766	>	public void testCompleteOnTimeout_completed() {
3767	>	for (Integer v1 : new Integer[] { 1, null })
3768	>	{
3769	>	CompletableFuture<Integer> f = new CompletableFuture<>();
3770	>	CompletableFuture<Integer> g = new CompletableFuture<>();
3771		long startTime = System.nanoTime();
3772	<	CompletableFuture<Integer> f = CompletableFuture.supplyAsync(() -> 1, d);
3773	<	assertNull(f.getNow(null));
3774	<	assertEquals(1, (int) f.get(LONG_DELAY_MS, MILLISECONDS));
3775	<	assertTrue(millisElapsedSince(startTime) > timeoutMillis/2);
3776	<	checkCompletedNormally(f, 1);
3777	<	}
3772	>	f.complete(v1);
3773	>	assertSame(f, f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3774	>	assertSame(g, g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS));
3775	>	g.complete(v1);
3776	>	checkCompletedNormally(f, v1);
3777	>	checkCompletedNormally(g, v1);
3778	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3779	>	}}
3780
3781		/**
3782	<	* delayedExecutor for a given executor returns an executor that
3618	<	* delays submission
3782	>	* delayedExecutor returns an executor that delays submission
3783		*/
3784	<	public void testDelayedExecutor2() throws Exception {
3785	<	long timeoutMillis = SMALL_DELAY_MS;
3786	<	Executor d = CompletableFuture.delayedExecutor(timeoutMillis,
3787	<	MILLISECONDS,
3788	<	new ThreadExecutor());
3784	>	public void testDelayedExecutor() {
3785	>	testInParallel(() -> testDelayedExecutor(null, null),
3786	>	() -> testDelayedExecutor(null, 1),
3787	>	() -> testDelayedExecutor(new ThreadExecutor(), 1),
3788	>	() -> testDelayedExecutor(new ThreadExecutor(), 1));
3789	>	}
3790	>
3791	>	public void testDelayedExecutor(Executor executor, Integer v) throws Exception {
3792	>	long timeoutMillis = timeoutMillis();
3793	>	// Use an "unreasonably long" long timeout to catch lingering threads
3794	>	long longTimeoutMillis = 1000 * 60 * 60 * 24;
3795	>	final Executor delayer, longDelayer;
3796	>	if (executor == null) {
3797	>	delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS);
3798	>	longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS);
3799	>	} else {
3800	>	delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS, executor);
3801	>	longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS, executor);
3802	>	}
3803		long startTime = System.nanoTime();
3804	<	CompletableFuture<Integer> f = CompletableFuture.supplyAsync(() -> 1, d);
3805	<	assertNull(f.getNow(null));
3806	<	assertEquals(1, (int) f.get(LONG_DELAY_MS, MILLISECONDS));
3807	<	assertTrue(millisElapsedSince(startTime) > timeoutMillis/2);
3808	<	checkCompletedNormally(f, 1);
3804	>	CompletableFuture<Integer> f =
3805	>	CompletableFuture.supplyAsync(() -> v, delayer);
3806	>	CompletableFuture<Integer> g =
3807	>	CompletableFuture.supplyAsync(() -> v, longDelayer);
3808	>
3809	>	assertNull(g.getNow(null));
3810	>
3811	>	assertSame(v, f.get(LONG_DELAY_MS, MILLISECONDS));
3812	>	long millisElapsed = millisElapsedSince(startTime);
3813	>	assertTrue(millisElapsed >= timeoutMillis);
3814	>	assertTrue(millisElapsed < LONG_DELAY_MS / 2);
3815	>
3816	>	checkCompletedNormally(f, v);
3817	>
3818	>	checkIncomplete(g);
3819	>	assertTrue(g.cancel(true));
3820		}
3821
3822		//--- tests of implementation details; not part of official tck ---
3823
3824		Object resultOf(CompletableFuture<?> f) {
3825	+	SecurityManager sm = System.getSecurityManager();
3826	+	if (sm != null) {
3827	+	try {
3828	+	System.setSecurityManager(null);
3829	+	} catch (SecurityException giveUp) {
3830	+	return "Reflection not available";
3831	+	}
3832	+	}
3833	+
3834		try {
3835		java.lang.reflect.Field resultField
3836		= CompletableFuture.class.getDeclaredField("result");
3837		resultField.setAccessible(true);
3838		return resultField.get(f);
3839	<	} catch (Throwable t) { throw new AssertionError(t); }
3839	>	} catch (Throwable t) {
3840	>	throw new AssertionError(t);
3841	>	} finally {
3842	>	if (sm != null) System.setSecurityManager(sm);
3843	>	}
3844		}
3845
3846		public void testExceptionPropagationReusesResultObject() {
#	Line 3661 | Line 3863 | public class CompletableFutureTest exten
3863		funs.add((y) -> m.applyToEither(y, incomplete, new IncFunction(m)));
3864
3865		funs.add((y) -> m.runAfterBoth(y, v42, new Noop(m)));
3866	+	funs.add((y) -> m.runAfterBoth(v42, y, new Noop(m)));
3867		funs.add((y) -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3868	+	funs.add((y) -> m.thenAcceptBoth(v42, y, new SubtractAction(m)));
3869		funs.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m)));
3870	+	funs.add((y) -> m.thenCombine(v42, y, new SubtractFunction(m)));
3871
3872	<	funs.add((y) -> m.whenComplete(y, (Integer x, Throwable t) -> {}));
3872	>	funs.add((y) -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
3873
3874		funs.add((y) -> m.thenCompose(y, new CompletableFutureInc(m)));
3875
3876	+	funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y}));
3877		funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {y, v42}));
3878	+	funs.add((y) -> CompletableFuture.allOf(new CompletableFuture<?>[] {v42, y}));
3879	+	funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y}));
3880		funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {y, incomplete}));
3881	+	funs.add((y) -> CompletableFuture.anyOf(new CompletableFuture<?>[] {incomplete, y}));
3882
3883		for (Function<CompletableFuture<Integer>, CompletableFuture<?>>
3884		fun : funs) {
#	Line 3720 | Line 3929 | public class CompletableFutureTest exten
3929		}
3930		}}
3931
3932	+	/**
3933	+	* Minimal completion stages throw UOE for all non-CompletionStage methods
3934	+	*/
3935	+	public void testMinimalCompletionStage_minimality() {
3936	+	if (!testImplementationDetails) return;
3937	+	Function<Method, String> toSignature =
3938	+	(method) -> method.getName() + Arrays.toString(method.getParameterTypes());
3939	+	Predicate<Method> isNotStatic =
3940	+	(method) -> (method.getModifiers() & Modifier.STATIC) == 0;
3941	+	List<Method> minimalMethods =
3942	+	Stream.of(Object.class, CompletionStage.class)
3943	+	.flatMap((klazz) -> Stream.of(klazz.getMethods()))
3944	+	.filter(isNotStatic)
3945	+	.collect(Collectors.toList());
3946	+	// Methods from CompletableFuture permitted NOT to throw UOE
3947	+	String[] signatureWhitelist = {
3948	+	"newIncompleteFuture[]",
3949	+	"defaultExecutor[]",
3950	+	"minimalCompletionStage[]",
3951	+	"copy[]",
3952	+	};
3953	+	Set<String> permittedMethodSignatures =
3954	+	Stream.concat(minimalMethods.stream().map(toSignature),
3955	+	Stream.of(signatureWhitelist))
3956	+	.collect(Collectors.toSet());
3957	+	List<Method> allMethods = Stream.of(CompletableFuture.class.getMethods())
3958	+	.filter(isNotStatic)
3959	+	.filter((method) -> !permittedMethodSignatures.contains(toSignature.apply(method)))
3960	+	.collect(Collectors.toList());
3961	+
3962	+	CompletionStage<Integer> minimalStage =
3963	+	new CompletableFuture<Integer>().minimalCompletionStage();
3964	+
3965	+	List<Method> bugs = new ArrayList<>();
3966	+	for (Method method : allMethods) {
3967	+	Class<?>[] parameterTypes = method.getParameterTypes();
3968	+	Object[] args = new Object[parameterTypes.length];
3969	+	// Manufacture boxed primitives for primitive params
3970	+	for (int i = 0; i < args.length; i++) {
3971	+	Class<?> type = parameterTypes[i];
3972	+	if (parameterTypes[i] == boolean.class)
3973	+	args[i] = false;
3974	+	else if (parameterTypes[i] == int.class)
3975	+	args[i] = 0;
3976	+	else if (parameterTypes[i] == long.class)
3977	+	args[i] = 0L;
3978	+	}
3979	+	try {
3980	+	method.invoke(minimalStage, args);
3981	+	bugs.add(method);
3982	+	}
3983	+	catch (java.lang.reflect.InvocationTargetException expected) {
3984	+	if (! (expected.getCause() instanceof UnsupportedOperationException)) {
3985	+	bugs.add(method);
3986	+	// expected.getCause().printStackTrace();
3987	+	}
3988	+	}
3989	+	catch (ReflectiveOperationException bad) { throw new Error(bad); }
3990	+	}
3991	+	if (!bugs.isEmpty())
3992	+	throw new Error("Methods did not throw UOE: " + bugs.toString());
3993	+	}
3994	+
3995	+	static class Monad {
3996	+	static class ZeroException extends RuntimeException {
3997	+	public ZeroException() { super("monadic zero"); }
3998	+	}
3999	+	// "return", "unit"
4000	+	static <T> CompletableFuture<T> unit(T value) {
4001	+	return completedFuture(value);
4002	+	}
4003	+	// monadic zero ?
4004	+	static <T> CompletableFuture<T> zero() {
4005	+	return failedFuture(new ZeroException());
4006	+	}
4007	+	// >=>
4008	+	static <T,U,V> Function<T, CompletableFuture<V>> compose
4009	+	(Function<T, CompletableFuture<U>> f,
4010	+	Function<U, CompletableFuture<V>> g) {
4011	+	return (x) -> f.apply(x).thenCompose(g);
4012	+	}
4013	+
4014	+	static void assertZero(CompletableFuture<?> f) {
4015	+	try {
4016	+	f.getNow(null);
4017	+	throw new AssertionFailedError("should throw");
4018	+	} catch (CompletionException success) {
4019	+	assertTrue(success.getCause() instanceof ZeroException);
4020	+	}
4021	+	}
4022	+
4023	+	static <T> void assertFutureEquals(CompletableFuture<T> f,
4024	+	CompletableFuture<T> g) {
4025	+	T fval = null, gval = null;
4026	+	Throwable fex = null, gex = null;
4027	+
4028	+	try { fval = f.get(); }
4029	+	catch (ExecutionException ex) { fex = ex.getCause(); }
4030	+	catch (Throwable ex) { fex = ex; }
4031	+
4032	+	try { gval = g.get(); }
4033	+	catch (ExecutionException ex) { gex = ex.getCause(); }
4034	+	catch (Throwable ex) { gex = ex; }
4035	+
4036	+	if (fex != null || gex != null)
4037	+	assertSame(fex.getClass(), gex.getClass());
4038	+	else
4039	+	assertEquals(fval, gval);
4040	+	}
4041	+
4042	+	static class PlusFuture<T> extends CompletableFuture<T> {
4043	+	AtomicReference<Throwable> firstFailure = new AtomicReference<>(null);
4044	+	}
4045	+
4046	+	/** Implements "monadic plus". */
4047	+	static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f,
4048	+	CompletableFuture<? extends T> g) {
4049	+	PlusFuture<T> plus = new PlusFuture<T>();
4050	+	BiConsumer<T, Throwable> action = (T result, Throwable ex) -> {
4051	+	try {
4052	+	if (ex == null) {
4053	+	if (plus.complete(result))
4054	+	if (plus.firstFailure.get() != null)
4055	+	plus.firstFailure.set(null);
4056	+	}
4057	+	else if (plus.firstFailure.compareAndSet(null, ex)) {
4058	+	if (plus.isDone())
4059	+	plus.firstFailure.set(null);
4060	+	}
4061	+	else {
4062	+	// first failure has precedence
4063	+	Throwable first = plus.firstFailure.getAndSet(null);
4064	+
4065	+	// may fail with "Self-suppression not permitted"
4066	+	try { first.addSuppressed(ex); }
4067	+	catch (Exception ignored) {}
4068	+
4069	+	plus.completeExceptionally(first);
4070	+	}
4071	+	} catch (Throwable unexpected) {
4072	+	plus.completeExceptionally(unexpected);
4073	+	}
4074	+	};
4075	+	f.whenComplete(action);
4076	+	g.whenComplete(action);
4077	+	return plus;
4078	+	}
4079	+	}
4080	+
4081	+	/**
4082	+	* CompletableFuture is an additive monad - sort of.
4083	+	* https://en.wikipedia.org/wiki/Monad_(functional_programming)#Additive_monads
4084	+	*/
4085	+	public void testAdditiveMonad() throws Throwable {
4086	+	Function<Long, CompletableFuture<Long>> unit = Monad::unit;
4087	+	CompletableFuture<Long> zero = Monad.zero();
4088	+
4089	+	// Some mutually non-commutative functions
4090	+	Function<Long, CompletableFuture<Long>> triple
4091	+	= (x) -> Monad.unit(3 * x);
4092	+	Function<Long, CompletableFuture<Long>> inc
4093	+	= (x) -> Monad.unit(x + 1);
4094	+
4095	+	// unit is a right identity: m >>= unit === m
4096	+	Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
4097	+	inc.apply(5L));
4098	+	// unit is a left identity: (unit x) >>= f === f x
4099	+	Monad.assertFutureEquals(unit.apply(5L).thenCompose(inc),
4100	+	inc.apply(5L));
4101	+
4102	+	// associativity: (m >>= f) >>= g === m >>= ( \x -> (f x >>= g) )
4103	+	Monad.assertFutureEquals(
4104	+	unit.apply(5L).thenCompose(inc).thenCompose(triple),
4105	+	unit.apply(5L).thenCompose((x) -> inc.apply(x).thenCompose(triple)));
4106	+
4107	+	// The case for CompletableFuture as an additive monad is weaker...
4108	+
4109	+	// zero is a monadic zero
4110	+	Monad.assertZero(zero);
4111	+
4112	+	// left zero: zero >>= f === zero
4113	+	Monad.assertZero(zero.thenCompose(inc));
4114	+	// right zero: f >>= (\x -> zero) === zero
4115	+	Monad.assertZero(inc.apply(5L).thenCompose((x) -> zero));
4116	+
4117	+	// f plus zero === f
4118	+	Monad.assertFutureEquals(Monad.unit(5L),
4119	+	Monad.plus(Monad.unit(5L), zero));
4120	+	// zero plus f === f
4121	+	Monad.assertFutureEquals(Monad.unit(5L),
4122	+	Monad.plus(zero, Monad.unit(5L)));
4123	+	// zero plus zero === zero
4124	+	Monad.assertZero(Monad.plus(zero, zero));
4125	+	{
4126	+	CompletableFuture<Long> f = Monad.plus(Monad.unit(5L),
4127	+	Monad.unit(8L));
4128	+	// non-determinism
4129	+	assertTrue(f.get() == 5L || f.get() == 8L);
4130	+	}
4131	+
4132	+	CompletableFuture<Long> godot = new CompletableFuture<>();
4133	+	// f plus godot === f (doesn't wait for godot)
4134	+	Monad.assertFutureEquals(Monad.unit(5L),
4135	+	Monad.plus(Monad.unit(5L), godot));
4136	+	// godot plus f === f (doesn't wait for godot)
4137	+	Monad.assertFutureEquals(Monad.unit(5L),
4138	+	Monad.plus(godot, Monad.unit(5L)));
4139	+	}
4140	+
4141	+	/**
4142	+	* A single CompletableFuture with many dependents.
4143	+	* A demo of scalability - runtime is O(n).
4144	+	*/
4145	+	public void testManyDependents() throws Throwable {
4146	+	final int n = 1_000;
4147	+	final CompletableFuture<Void> head = new CompletableFuture<>();
4148	+	final CompletableFuture<Void> complete = CompletableFuture.completedFuture((Void)null);
4149	+	final AtomicInteger count = new AtomicInteger(0);
4150	+	for (int i = 0; i < n; i++) {
4151	+	head.thenRun(() -> count.getAndIncrement());
4152	+	head.thenAccept((x) -> count.getAndIncrement());
4153	+	head.thenApply((x) -> count.getAndIncrement());
4154	+
4155	+	head.runAfterBoth(complete, () -> count.getAndIncrement());
4156	+	head.thenAcceptBoth(complete, (x, y) -> count.getAndIncrement());
4157	+	head.thenCombine(complete, (x, y) -> count.getAndIncrement());
4158	+	complete.runAfterBoth(head, () -> count.getAndIncrement());
4159	+	complete.thenAcceptBoth(head, (x, y) -> count.getAndIncrement());
4160	+	complete.thenCombine(head, (x, y) -> count.getAndIncrement());
4161	+
4162	+	head.runAfterEither(new CompletableFuture<Void>(), () -> count.getAndIncrement());
4163	+	head.acceptEither(new CompletableFuture<Void>(), (x) -> count.getAndIncrement());
4164	+	head.applyToEither(new CompletableFuture<Void>(), (x) -> count.getAndIncrement());
4165	+	new CompletableFuture<Void>().runAfterEither(head, () -> count.getAndIncrement());
4166	+	new CompletableFuture<Void>().acceptEither(head, (x) -> count.getAndIncrement());
4167	+	new CompletableFuture<Void>().applyToEither(head, (x) -> count.getAndIncrement());
4168	+	}
4169	+	head.complete(null);
4170	+	assertEquals(5 * 3 * n, count.get());
4171	+	}
4172	+
4173	+	//     static <U> U join(CompletionStage<U> stage) {
4174	+	//         CompletableFuture<U> f = new CompletableFuture<>();
4175	+	//         stage.whenComplete((v, ex) -> {
4176	+	//             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4177	+	//         });
4178	+	//         return f.join();
4179	+	//     }
4180	+
4181	+	//     static <U> boolean isDone(CompletionStage<U> stage) {
4182	+	//         CompletableFuture<U> f = new CompletableFuture<>();
4183	+	//         stage.whenComplete((v, ex) -> {
4184	+	//             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
4185	+	//         });
4186	+	//         return f.isDone();
4187	+	//     }
4188	+
4189	+	//     static <U> U join2(CompletionStage<U> stage) {
4190	+	//         return stage.toCompletableFuture().copy().join();
4191	+	//     }
4192	+
4193	+	//     static <U> boolean isDone2(CompletionStage<U> stage) {
4194	+	//         return stage.toCompletableFuture().copy().isDone();
4195	+	//     }
4196	+
4197		}

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