ViewVC Help

View File | Revision Log | Show Annotations | Download File | Root Listing

root/jsr166/jsr166/src/test/tck/CompletableFutureTest.java

Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.117 by jsr166, Sat Sep 5 15:35:47 2015 UTC vs.
Revision 1.142 by dl, Fri Apr 1 23:18:00 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 28 | Line 38 | import java.util.function.BiConsumer;
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
#	Line 77 | Line 89 | public class CompletableFutureTest exten
89		assertTrue(f.toString().contains("[Completed normally]"));
90		}
91
92	<	void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
93	<	long startTime = System.nanoTime();
94	<	long timeoutMillis = LONG_DELAY_MS;
95	<	try {
96	<	f.get(timeoutMillis, MILLISECONDS);
97	<	shouldThrow();
98	<	} catch (ExecutionException success) {
99	<	assertTrue(success.getCause() instanceof CFException);
100	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
101	<	assertTrue(millisElapsedSince(startTime) < timeoutMillis/2);
102	<
103	<	try {
104	<	f.join();
105	<	shouldThrow();
106	<	} catch (CompletionException success) {
107	<	assertTrue(success.getCause() instanceof CFException);
108	<	}
97	<	try {
98	<	f.getNow(null);
99	<	shouldThrow();
100	<	} catch (CompletionException success) {
101	<	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 {
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	<	}
110	>	checker.accept(cause);
111
114	–	<U> void checkCompletedExceptionallyWithRootCause(CompletableFuture<U> f,
115	–	Throwable ex) {
112		long startTime = System.nanoTime();
117	–	long timeoutMillis = LONG_DELAY_MS;
113		try {
114	<	f.get(timeoutMillis, MILLISECONDS);
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) < timeoutMillis/2);
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
145	–	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 checkCompletedExceptionallyWithTimeout(CompletableFuture<U> f) {
149	<	long startTime = System.nanoTime();
150	<	long timeoutMillis = LONG_DELAY_MS;
151	<	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	<	}
148	>	void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
149	>	checkCompletedExceptionally(f, true,
150	>	(t) -> assertTrue(t instanceof CFException));
151	>	}
152
153	<	try {
154	<	f.get();
155	<	shouldThrow();
156	<	} catch (ExecutionException ex) {
179	<	assertTrue(ex.getCause() instanceof TimeoutException);
180	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
153	>	void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
154	>	checkCompletedExceptionally(f, true,
155	>	(t) -> assertTrue(t instanceof CancellationException));
156	>	}
157
158	<	assertTrue(f.isDone());
159	<	assertFalse(f.isCancelled());
160	<	assertTrue(f.toString().contains("[Completed exceptionally]"));
158	>	void checkCompletedWithTimeoutException(CompletableFuture<?> f) {
159	>	checkCompletedExceptionally(f, false,
160	>	(t) -> assertTrue(t instanceof TimeoutException));
161		}
162
163	<	<U> void checkCompletedWithWrappedException(CompletableFuture<U> f,
164	<	Throwable ex) {
165	<	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); }
163	>	void checkCompletedWithWrappedException(CompletableFuture<?> f,
164	>	Throwable ex) {
165	>	checkCompletedExceptionally(f, true, (t) -> assertSame(t, ex));
166		}
167
168	<	<U> void checkCompletedExceptionally(CompletableFuture<U> f, Throwable ex) {
169	<	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); }
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();
209	–	long timeoutMillis = LONG_DELAY_MS;
174		try {
175	<	f.get(timeoutMillis, MILLISECONDS);
175	>	f.get(LONG_DELAY_MS, MILLISECONDS);
176		shouldThrow();
177		} catch (CancellationException success) {
178		} catch (Throwable fail) { threadUnexpectedException(fail); }
179	<	assertTrue(millisElapsedSince(startTime) < timeoutMillis/2);
179	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
180
181		try {
182		f.join();
#	Line 227 | Line 191 | public class CompletableFutureTest exten
191		shouldThrow();
192		} catch (CancellationException success) {
193		} 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	–	}
194
195	<	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);
195	>	assertTrue(exceptionalCompletion(f) instanceof CancellationException);
196
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); }
197		assertTrue(f.isDone());
266	–	assertFalse(f.isCancelled());
198		assertTrue(f.isCompletedExceptionally());
199	+	assertTrue(f.isCancelled());
200		assertTrue(f.toString().contains("[Completed exceptionally]"));
201		}
202
#	Line 708 | Line 640 | public class CompletableFutureTest exten
640
641		ASYNC {
642		public void checkExecutionMode() {
643	<	assertEquals(defaultExecutorIsCommonPool,
644	<	(ForkJoinPool.commonPool() == ForkJoinTask.getPool()));
643	>	// If tests are added that may run across different
644	>	// pools, this needs to be weakened to no-op.
645	>	ForkJoinPool p = ForkJoinTask.getPool();
646	>	assertTrue(p == null ||
647	>	(defaultExecutorIsCommonPool &&
648	>	p == ForkJoinPool.commonPool()));
649		}
650		public CompletableFuture<Void> runAsync(Runnable a) {
651		return CompletableFuture.runAsync(a);
#	Line 908 | Line 844 | public class CompletableFutureTest exten
844		if (!createIncomplete) assertTrue(f.complete(v1));
845		final CompletableFuture<Integer> g = f.exceptionally
846		((Throwable t) -> {
911	–	// Should not be called
847		a.getAndIncrement();
848	<	throw new AssertionError();
848	>	threadFail("should not be called");
849	>	return null;            // unreached
850		});
851		if (createIncomplete) assertTrue(f.complete(v1));
852
#	Line 944 | Line 880 | public class CompletableFutureTest exten
880		assertEquals(1, a.get());
881		}}
882
883	+	/**
884	+	* If an "exceptionally action" throws an exception, it completes
885	+	* exceptionally with that exception
886	+	*/
887		public void testExceptionally_exceptionalCompletionActionFailed() {
888		for (boolean createIncomplete : new boolean[] { true, false })
889		{
#	Line 962 | Line 902 | public class CompletableFutureTest exten
902		if (createIncomplete) f.completeExceptionally(ex1);
903
904		checkCompletedWithWrappedException(g, ex2);
905	+	checkCompletedExceptionally(f, ex1);
906		assertEquals(1, a.get());
907		}}
908
#	Line 969 | Line 910 | public class CompletableFutureTest exten
910		* whenComplete action executes on normal completion, propagating
911		* source result.
912		*/
913	<	public void testWhenComplete_normalCompletion1() {
913	>	public void testWhenComplete_normalCompletion() {
914		for (ExecutionMode m : ExecutionMode.values())
915		for (boolean createIncomplete : new boolean[] { true, false })
916		for (Integer v1 : new Integer[] { 1, null })
#	Line 979 | Line 920 | public class CompletableFutureTest exten
920		if (!createIncomplete) assertTrue(f.complete(v1));
921		final CompletableFuture<Integer> g = m.whenComplete
922		(f,
923	<	(Integer x, Throwable t) -> {
923	>	(Integer result, Throwable t) -> {
924		m.checkExecutionMode();
925	<	threadAssertSame(x, v1);
925	>	threadAssertSame(result, v1);
926		threadAssertNull(t);
927		a.getAndIncrement();
928		});
#	Line 1006 | Line 947 | public class CompletableFutureTest exten
947		if (!createIncomplete) f.completeExceptionally(ex);
948		final CompletableFuture<Integer> g = m.whenComplete
949		(f,
950	<	(Integer x, Throwable t) -> {
950	>	(Integer result, Throwable t) -> {
951		m.checkExecutionMode();
952	<	threadAssertNull(x);
952	>	threadAssertNull(result);
953		threadAssertSame(t, ex);
954		a.getAndIncrement();
955		});
#	Line 1033 | Line 974 | public class CompletableFutureTest exten
974		if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
975		final CompletableFuture<Integer> g = m.whenComplete
976		(f,
977	<	(Integer x, Throwable t) -> {
977	>	(Integer result, Throwable t) -> {
978		m.checkExecutionMode();
979	<	threadAssertNull(x);
979	>	threadAssertNull(result);
980		threadAssertTrue(t instanceof CancellationException);
981		a.getAndIncrement();
982		});
#	Line 1050 | Line 991 | public class CompletableFutureTest exten
991		* If a whenComplete action throws an exception when triggered by
992		* a normal completion, it completes exceptionally
993		*/
994	<	public void testWhenComplete_actionFailed() {
994	>	public void testWhenComplete_sourceCompletedNormallyActionFailed() {
995		for (boolean createIncomplete : new boolean[] { true, false })
996		for (ExecutionMode m : ExecutionMode.values())
997		for (Integer v1 : new Integer[] { 1, null })
#	Line 1061 | Line 1002 | public class CompletableFutureTest exten
1002		if (!createIncomplete) assertTrue(f.complete(v1));
1003		final CompletableFuture<Integer> g = m.whenComplete
1004		(f,
1005	<	(Integer x, Throwable t) -> {
1005	>	(Integer result, Throwable t) -> {
1006		m.checkExecutionMode();
1007	<	threadAssertSame(x, v1);
1007	>	threadAssertSame(result, v1);
1008		threadAssertNull(t);
1009		a.getAndIncrement();
1010		throw ex;
#	Line 1078 | Line 1019 | public class CompletableFutureTest exten
1019		/**
1020		* If a whenComplete action throws an exception when triggered by
1021		* a source completion that also throws an exception, the source
1022	<	* exception takes precedence.
1022	>	* exception takes precedence (unlike handle)
1023		*/
1024	<	public void testWhenComplete_actionFailedSourceFailed() {
1024	>	public void testWhenComplete_sourceFailedActionFailed() {
1025		for (boolean createIncomplete : new boolean[] { true, false })
1026		for (ExecutionMode m : ExecutionMode.values())
1027		{
#	Line 1092 | Line 1033 | public class CompletableFutureTest exten
1033		if (!createIncomplete) f.completeExceptionally(ex1);
1034		final CompletableFuture<Integer> g = m.whenComplete
1035		(f,
1036	<	(Integer x, Throwable t) -> {
1036	>	(Integer result, Throwable t) -> {
1037		m.checkExecutionMode();
1038		threadAssertSame(t, ex1);
1039	<	threadAssertNull(x);
1039	>	threadAssertNull(result);
1040		a.getAndIncrement();
1041		throw ex2;
1042		});
#	Line 1103 | Line 1044 | public class CompletableFutureTest exten
1044
1045		checkCompletedWithWrappedException(g, ex1);
1046		checkCompletedExceptionally(f, ex1);
1047	+	if (testImplementationDetails) {
1048	+	assertEquals(1, ex1.getSuppressed().length);
1049	+	assertSame(ex2, ex1.getSuppressed()[0]);
1050	+	}
1051		assertEquals(1, a.get());
1052		}}
1053
#	Line 1120 | Line 1065 | public class CompletableFutureTest exten
1065		if (!createIncomplete) assertTrue(f.complete(v1));
1066		final CompletableFuture<Integer> g = m.handle
1067		(f,
1068	<	(Integer x, Throwable t) -> {
1068	>	(Integer result, Throwable t) -> {
1069		m.checkExecutionMode();
1070	<	threadAssertSame(x, v1);
1070	>	threadAssertSame(result, v1);
1071		threadAssertNull(t);
1072		a.getAndIncrement();
1073		return inc(v1);
#	Line 1149 | Line 1094 | public class CompletableFutureTest exten
1094		if (!createIncomplete) f.completeExceptionally(ex);
1095		final CompletableFuture<Integer> g = m.handle
1096		(f,
1097	<	(Integer x, Throwable t) -> {
1097	>	(Integer result, Throwable t) -> {
1098		m.checkExecutionMode();
1099	<	threadAssertNull(x);
1099	>	threadAssertNull(result);
1100		threadAssertSame(t, ex);
1101		a.getAndIncrement();
1102		return v1;
#	Line 1178 | Line 1123 | public class CompletableFutureTest exten
1123		if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1124		final CompletableFuture<Integer> g = m.handle
1125		(f,
1126	<	(Integer x, Throwable t) -> {
1126	>	(Integer result, Throwable t) -> {
1127		m.checkExecutionMode();
1128	<	threadAssertNull(x);
1128	>	threadAssertNull(result);
1129		threadAssertTrue(t instanceof CancellationException);
1130		a.getAndIncrement();
1131		return v1;
#	Line 1193 | Line 1138 | public class CompletableFutureTest exten
1138		}}
1139
1140		/**
1141	<	* handle result completes exceptionally if action does
1141	>	* If a "handle action" throws an exception when triggered by
1142	>	* a normal completion, it completes exceptionally
1143		*/
1144	<	public void testHandle_sourceFailedActionFailed() {
1144	>	public void testHandle_sourceCompletedNormallyActionFailed() {
1145		for (ExecutionMode m : ExecutionMode.values())
1146		for (boolean createIncomplete : new boolean[] { true, false })
1147	+	for (Integer v1 : new Integer[] { 1, null })
1148		{
1149		final CompletableFuture<Integer> f = new CompletableFuture<>();
1150		final AtomicInteger a = new AtomicInteger(0);
1151	<	final CFException ex1 = new CFException();
1152	<	final CFException ex2 = new CFException();
1206	<	if (!createIncomplete) f.completeExceptionally(ex1);
1151	>	final CFException ex = new CFException();
1152	>	if (!createIncomplete) assertTrue(f.complete(v1));
1153		final CompletableFuture<Integer> g = m.handle
1154		(f,
1155	<	(Integer x, Throwable t) -> {
1155	>	(Integer result, Throwable t) -> {
1156		m.checkExecutionMode();
1157	<	threadAssertNull(x);
1158	<	threadAssertSame(ex1, t);
1157	>	threadAssertSame(result, v1);
1158	>	threadAssertNull(t);
1159		a.getAndIncrement();
1160	<	throw ex2;
1160	>	throw ex;
1161		});
1162	<	if (createIncomplete) f.completeExceptionally(ex1);
1162	>	if (createIncomplete) assertTrue(f.complete(v1));
1163
1164	<	checkCompletedWithWrappedException(g, ex2);
1165	<	checkCompletedExceptionally(f, ex1);
1164	>	checkCompletedWithWrappedException(g, ex);
1165	>	checkCompletedNormally(f, v1);
1166		assertEquals(1, a.get());
1167		}}
1168
1169	<	public void testHandle_sourceCompletedNormallyActionFailed() {
1170	<	for (ExecutionMode m : ExecutionMode.values())
1169	>	/**
1170	>	* If a "handle action" throws an exception when triggered by
1171	>	* a source completion that also throws an exception, the action
1172	>	* exception takes precedence (unlike whenComplete)
1173	>	*/
1174	>	public void testHandle_sourceFailedActionFailed() {
1175		for (boolean createIncomplete : new boolean[] { true, false })
1176	<	for (Integer v1 : new Integer[] { 1, null })
1176	>	for (ExecutionMode m : ExecutionMode.values())
1177		{
1228	–	final CompletableFuture<Integer> f = new CompletableFuture<>();
1178		final AtomicInteger a = new AtomicInteger(0);
1179	<	final CFException ex = new CFException();
1180	<	if (!createIncomplete) assertTrue(f.complete(v1));
1179	>	final CFException ex1 = new CFException();
1180	>	final CFException ex2 = new CFException();
1181	>	final CompletableFuture<Integer> f = new CompletableFuture<>();
1182	>
1183	>	if (!createIncomplete) f.completeExceptionally(ex1);
1184		final CompletableFuture<Integer> g = m.handle
1185		(f,
1186	<	(Integer x, Throwable t) -> {
1186	>	(Integer result, Throwable t) -> {
1187		m.checkExecutionMode();
1188	<	threadAssertSame(x, v1);
1189	<	threadAssertNull(t);
1188	>	threadAssertNull(result);
1189	>	threadAssertSame(ex1, t);
1190		a.getAndIncrement();
1191	<	throw ex;
1191	>	throw ex2;
1192		});
1193	<	if (createIncomplete) assertTrue(f.complete(v1));
1193	>	if (createIncomplete) f.completeExceptionally(ex1);
1194
1195	<	checkCompletedWithWrappedException(g, ex);
1196	<	checkCompletedNormally(f, v1);
1195	>	checkCompletedWithWrappedException(g, ex2);
1196	>	checkCompletedExceptionally(f, ex1);
1197		assertEquals(1, a.get());
1198		}}
1199
#	Line 3142 | Line 3094 | public class CompletableFutureTest exten
3094		for (int i = 0; i < k; i++) {
3095		checkIncomplete(f);
3096		checkIncomplete(CompletableFuture.allOf(fs));
3097	<	if (i != k/2) {
3097	>	if (i != k / 2) {
3098		fs[i].complete(i);
3099		checkCompletedNormally(fs[i], i);
3100		} else {
#	Line 3352 | Line 3304 | public class CompletableFutureTest exten
3304
3305		() -> f.orTimeout(1L, null),
3306		() -> f.completeOnTimeout(42, 1L, null),
3307	+
3308	+	() -> CompletableFuture.failedFuture(null),
3309	+	() -> CompletableFuture.failedStage(null),
3310		};
3311
3312		assertThrows(NullPointerException.class, throwingActions);
#	Line 3390 | Line 3345 | public class CompletableFutureTest exten
3345		* completedStage returns a completed CompletionStage
3346		*/
3347		public void testCompletedStage() {
3348	<	AtomicInteger x = new AtomicInteger();
3348	>	AtomicInteger x = new AtomicInteger(0);
3349		AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3350		CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3351		f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
#	Line 3419 | Line 3374 | public class CompletableFutureTest exten
3374		public void testFailedFuture() {
3375		CFException ex = new CFException();
3376		CompletableFuture<Integer> f = CompletableFuture.failedFuture(ex);
3377	<	checkCompletedExceptionallyWithRootCause(f, ex);
3377	>	checkCompletedExceptionally(f, ex);
3378		}
3379
3380		/**
3381		* failedFuture(null) throws NPE
3382		*/
3383	<	public void testFailedFuture2() {
3383	>	public void testFailedFuture_null() {
3384		try {
3385		CompletableFuture<Integer> f = CompletableFuture.failedFuture(null);
3386		shouldThrow();
#	Line 3458 | Line 3413 | public class CompletableFutureTest exten
3413		CFException ex = new CFException();
3414		f.completeExceptionally(ex);
3415		checkCompletedExceptionally(f, ex);
3416	<	checkCompletedWithWrappedCFException(g);
3416	>	checkCompletedWithWrappedException(g, ex);
3417		}
3418
3419		/**
#	Line 3468 | Line 3423 | public class CompletableFutureTest exten
3423		public void testMinimalCompletionStage() {
3424		CompletableFuture<Integer> f = new CompletableFuture<>();
3425		CompletionStage<Integer> g = f.minimalCompletionStage();
3426	<	AtomicInteger x = new AtomicInteger();
3426	>	AtomicInteger x = new AtomicInteger(0);
3427		AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3428		checkIncomplete(f);
3429		g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
#	Line 3485 | Line 3440 | public class CompletableFutureTest exten
3440		public void testMinimalCompletionStage2() {
3441		CompletableFuture<Integer> f = new CompletableFuture<>();
3442		CompletionStage<Integer> g = f.minimalCompletionStage();
3443	<	AtomicInteger x = new AtomicInteger();
3443	>	AtomicInteger x = new AtomicInteger(0);
3444		AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3445		g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3446		checkIncomplete(f);
#	Line 3503 | Line 3458 | public class CompletableFutureTest exten
3458		public void testFailedStage() {
3459		CFException ex = new CFException();
3460		CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3461	<	AtomicInteger x = new AtomicInteger();
3461	>	AtomicInteger x = new AtomicInteger(0);
3462		AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3463		f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3464		assertEquals(x.get(), 0);
3465	<	assertEquals(r.get().getCause(), ex);
3465	>	assertEquals(r.get(), ex);
3466		}
3467
3468		/**
3469		* completeAsync completes with value of given supplier
3470		*/
3471		public void testCompleteAsync() {
3472	+	for (Integer v1 : new Integer[] { 1, null })
3473	+	{
3474		CompletableFuture<Integer> f = new CompletableFuture<>();
3475	<	f.completeAsync(() -> 1);
3475	>	f.completeAsync(() -> v1);
3476		f.join();
3477	<	checkCompletedNormally(f, 1);
3478	<	}
3477	>	checkCompletedNormally(f, v1);
3478	>	}}
3479
3480		/**
3481		* completeAsync completes exceptionally if given supplier throws
#	Line 3530 | Line 3487 | public class CompletableFutureTest exten
3487		try {
3488		f.join();
3489		shouldThrow();
3490	<	} catch (Exception success) {}
3491	<	checkCompletedWithWrappedCFException(f);
3490	>	} catch (CompletionException success) {}
3491	>	checkCompletedWithWrappedException(f, ex);
3492		}
3493
3494		/**
3495		* completeAsync with given executor completes with value of given supplier
3496		*/
3497		public void testCompleteAsync3() {
3498	+	for (Integer v1 : new Integer[] { 1, null })
3499	+	{
3500		CompletableFuture<Integer> f = new CompletableFuture<>();
3501	<	f.completeAsync(() -> 1, new ThreadExecutor());
3502	<	f.join();
3503	<	checkCompletedNormally(f, 1);
3504	<	}
3501	>	ThreadExecutor executor = new ThreadExecutor();
3502	>	f.completeAsync(() -> v1, executor);
3503	>	assertSame(v1, f.join());
3504	>	checkCompletedNormally(f, v1);
3505	>	assertEquals(1, executor.count.get());
3506	>	}}
3507
3508		/**
3509		* completeAsync with given executor completes exceptionally if
#	Line 3551 | Line 3512 | public class CompletableFutureTest exten
3512		public void testCompleteAsync4() {
3513		CompletableFuture<Integer> f = new CompletableFuture<>();
3514		CFException ex = new CFException();
3515	<	f.completeAsync(() -> {if (true) throw ex; return 1;}, new ThreadExecutor());
3515	>	ThreadExecutor executor = new ThreadExecutor();
3516	>	f.completeAsync(() -> {if (true) throw ex; return 1;}, executor);
3517		try {
3518		f.join();
3519		shouldThrow();
3520	<	} catch (Exception success) {}
3521	<	checkCompletedWithWrappedCFException(f);
3520	>	} catch (CompletionException success) {}
3521	>	checkCompletedWithWrappedException(f, ex);
3522	>	assertEquals(1, executor.count.get());
3523		}
3524
3525		/**
3526		* orTimeout completes with TimeoutException if not complete
3527		*/
3528	<	public void testOrTimeout() {
3528	>	public void testOrTimeout_timesOut() {
3529	>	long timeoutMillis = timeoutMillis();
3530		CompletableFuture<Integer> f = new CompletableFuture<>();
3531	<	f.orTimeout(SHORT_DELAY_MS, MILLISECONDS);
3532	<	checkCompletedExceptionallyWithTimeout(f);
3531	>	long startTime = System.nanoTime();
3532	>	f.orTimeout(timeoutMillis, MILLISECONDS);
3533	>	checkCompletedWithTimeoutException(f);
3534	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3535		}
3536
3537		/**
3538		* orTimeout completes normally if completed before timeout
3539		*/
3540	<	public void testOrTimeout2() {
3540	>	public void testOrTimeout_completed() {
3541	>	for (Integer v1 : new Integer[] { 1, null })
3542	>	{
3543		CompletableFuture<Integer> f = new CompletableFuture<>();
3544	<	f.complete(1);
3545	<	f.orTimeout(SHORT_DELAY_MS, MILLISECONDS);
3546	<	checkCompletedNormally(f, 1);
3547	<	}
3544	>	CompletableFuture<Integer> g = new CompletableFuture<>();
3545	>	long startTime = System.nanoTime();
3546	>	f.complete(v1);
3547	>	f.orTimeout(LONG_DELAY_MS, MILLISECONDS);
3548	>	g.orTimeout(LONG_DELAY_MS, MILLISECONDS);
3549	>	g.complete(v1);
3550	>	checkCompletedNormally(f, v1);
3551	>	checkCompletedNormally(g, v1);
3552	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3553	>	}}
3554
3555		/**
3556		* completeOnTimeout completes with given value if not complete
3557		*/
3558	<	public void testCompleteOnTimeout() {
3558	>	public void testCompleteOnTimeout_timesOut() {
3559	>	testInParallel(() -> testCompleteOnTimeout_timesOut(42),
3560	>	() -> testCompleteOnTimeout_timesOut(null));
3561	>	}
3562	>
3563	>	public void testCompleteOnTimeout_timesOut(Integer v) {
3564	>	long timeoutMillis = timeoutMillis();
3565		CompletableFuture<Integer> f = new CompletableFuture<>();
3566	<	f.completeOnTimeout(-1, SHORT_DELAY_MS, MILLISECONDS);
3567	<	f.join();
3568	<	checkCompletedNormally(f, -1);
3566	>	long startTime = System.nanoTime();
3567	>	f.completeOnTimeout(v, timeoutMillis, MILLISECONDS);
3568	>	assertSame(v, f.join());
3569	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3570	>	f.complete(99);         // should have no effect
3571	>	checkCompletedNormally(f, v);
3572		}
3573
3574		/**
3575		* completeOnTimeout has no effect if completed within timeout
3576		*/
3577	<	public void testCompleteOnTimeout2() {
3577	>	public void testCompleteOnTimeout_completed() {
3578	>	for (Integer v1 : new Integer[] { 1, null })
3579	>	{
3580		CompletableFuture<Integer> f = new CompletableFuture<>();
3581	<	f.complete(1);
3582	<	f.completeOnTimeout(-1, SHORT_DELAY_MS, MILLISECONDS);
3583	<	checkCompletedNormally(f, 1);
3584	<	}
3581	>	CompletableFuture<Integer> g = new CompletableFuture<>();
3582	>	long startTime = System.nanoTime();
3583	>	f.complete(v1);
3584	>	f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS);
3585	>	g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS);
3586	>	g.complete(v1);
3587	>	checkCompletedNormally(f, v1);
3588	>	checkCompletedNormally(g, v1);
3589	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3590	>	}}
3591
3592		/**
3593		* delayedExecutor returns an executor that delays submission
3594		*/
3595	<	public void testDelayedExecutor() throws Exception {
3596	<	long timeoutMillis = SMALL_DELAY_MS;
3597	<	Executor d = CompletableFuture.delayedExecutor(timeoutMillis,
3598	<	MILLISECONDS);
3595	>	public void testDelayedExecutor() {
3596	>	testInParallel(() -> testDelayedExecutor(null, null),
3597	>	() -> testDelayedExecutor(null, 1),
3598	>	() -> testDelayedExecutor(new ThreadExecutor(), 1),
3599	>	() -> testDelayedExecutor(new ThreadExecutor(), 1));
3600	>	}
3601	>
3602	>	public void testDelayedExecutor(Executor executor, Integer v) throws Exception {
3603	>	long timeoutMillis = timeoutMillis();
3604	>	// Use an "unreasonably long" long timeout to catch lingering threads
3605	>	long longTimeoutMillis = 1000 * 60 * 60 * 24;
3606	>	final Executor delayer, longDelayer;
3607	>	if (executor == null) {
3608	>	delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS);
3609	>	longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS);
3610	>	} else {
3611	>	delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS, executor);
3612	>	longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS, executor);
3613	>	}
3614		long startTime = System.nanoTime();
3615	<	CompletableFuture<Integer> f = CompletableFuture.supplyAsync(() -> 1, d);
3616	<	assertNull(f.getNow(null));
3617	<	assertEquals(1, (int) f.get(LONG_DELAY_MS, MILLISECONDS));
3618	<	assertTrue(millisElapsedSince(startTime) > timeoutMillis/2);
3619	<	checkCompletedNormally(f, 1);
3620	<	}
3615	>	CompletableFuture<Integer> f =
3616	>	CompletableFuture.supplyAsync(() -> v, delayer);
3617	>	CompletableFuture<Integer> g =
3618	>	CompletableFuture.supplyAsync(() -> v, longDelayer);
3619	>
3620	>	assertNull(g.getNow(null));
3621	>
3622	>	assertSame(v, f.get(LONG_DELAY_MS, MILLISECONDS));
3623	>	long millisElapsed = millisElapsedSince(startTime);
3624	>	assertTrue(millisElapsed >= timeoutMillis);
3625	>	assertTrue(millisElapsed < LONG_DELAY_MS / 2);
3626
3627	<	/**
3628	<	* delayedExecutor for a given executor returns an executor that
3629	<	* delays submission
3630	<	*/
3620	<	public void testDelayedExecutor2() throws Exception {
3621	<	long timeoutMillis = SMALL_DELAY_MS;
3622	<	Executor d = CompletableFuture.delayedExecutor(timeoutMillis,
3623	<	MILLISECONDS,
3624	<	new ThreadExecutor());
3625	<	long startTime = System.nanoTime();
3626	<	CompletableFuture<Integer> f = CompletableFuture.supplyAsync(() -> 1, d);
3627	<	assertNull(f.getNow(null));
3628	<	assertEquals(1, (int) f.get(LONG_DELAY_MS, MILLISECONDS));
3629	<	assertTrue(millisElapsedSince(startTime) > timeoutMillis/2);
3630	<	checkCompletedNormally(f, 1);
3627	>	checkCompletedNormally(f, v);
3628	>
3629	>	checkIncomplete(g);
3630	>	assertTrue(g.cancel(true));
3631		}
3632
3633		//--- tests of implementation details; not part of official tck ---
#	Line 3664 | Line 3664 | public class CompletableFutureTest exten
3664		funs.add((y) -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3665		funs.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m)));
3666
3667	<	funs.add((y) -> m.whenComplete(y, (Integer x, Throwable t) -> {}));
3667	>	funs.add((y) -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
3668
3669		funs.add((y) -> m.thenCompose(y, new CompletableFutureInc(m)));
3670
#	Line 3720 | Line 3720 | public class CompletableFutureTest exten
3720		}
3721		}}
3722
3723	+	/**
3724	+	* Minimal completion stages throw UOE for all non-CompletionStage methods
3725	+	*/
3726	+	public void testMinimalCompletionStage_minimality() {
3727	+	if (!testImplementationDetails) return;
3728	+	Function<Method, String> toSignature =
3729	+	(method) -> method.getName() + Arrays.toString(method.getParameterTypes());
3730	+	Predicate<Method> isNotStatic =
3731	+	(method) -> (method.getModifiers() & Modifier.STATIC) == 0;
3732	+	List<Method> minimalMethods =
3733	+	Stream.of(Object.class, CompletionStage.class)
3734	+	.flatMap((klazz) -> Stream.of(klazz.getMethods()))
3735	+	.filter(isNotStatic)
3736	+	.collect(Collectors.toList());
3737	+	// Methods from CompletableFuture permitted NOT to throw UOE
3738	+	String[] signatureWhitelist = {
3739	+	"newIncompleteFuture[]",
3740	+	"defaultExecutor[]",
3741	+	"minimalCompletionStage[]",
3742	+	"copy[]",
3743	+	};
3744	+	Set<String> permittedMethodSignatures =
3745	+	Stream.concat(minimalMethods.stream().map(toSignature),
3746	+	Stream.of(signatureWhitelist))
3747	+	.collect(Collectors.toSet());
3748	+	List<Method> allMethods = Stream.of(CompletableFuture.class.getMethods())
3749	+	.filter(isNotStatic)
3750	+	.filter((method) -> !permittedMethodSignatures.contains(toSignature.apply(method)))
3751	+	.collect(Collectors.toList());
3752	+
3753	+	CompletionStage<Integer> minimalStage =
3754	+	new CompletableFuture<Integer>().minimalCompletionStage();
3755	+
3756	+	List<Method> bugs = new ArrayList<>();
3757	+	for (Method method : allMethods) {
3758	+	Class<?>[] parameterTypes = method.getParameterTypes();
3759	+	Object[] args = new Object[parameterTypes.length];
3760	+	// Manufacture boxed primitives for primitive params
3761	+	for (int i = 0; i < args.length; i++) {
3762	+	Class<?> type = parameterTypes[i];
3763	+	if (parameterTypes[i] == boolean.class)
3764	+	args[i] = false;
3765	+	else if (parameterTypes[i] == int.class)
3766	+	args[i] = 0;
3767	+	else if (parameterTypes[i] == long.class)
3768	+	args[i] = 0L;
3769	+	}
3770	+	try {
3771	+	method.invoke(minimalStage, args);
3772	+	bugs.add(method);
3773	+	}
3774	+	catch (java.lang.reflect.InvocationTargetException expected) {
3775	+	if (! (expected.getCause() instanceof UnsupportedOperationException)) {
3776	+	bugs.add(method);
3777	+	// expected.getCause().printStackTrace();
3778	+	}
3779	+	}
3780	+	catch (ReflectiveOperationException bad) { throw new Error(bad); }
3781	+	}
3782	+	if (!bugs.isEmpty())
3783	+	throw new Error("Methods did not throw UOE: " + bugs.toString());
3784	+	}
3785	+
3786	+	static class Monad {
3787	+	static class ZeroException extends RuntimeException {
3788	+	public ZeroException() { super("monadic zero"); }
3789	+	}
3790	+	// "return", "unit"
3791	+	static <T> CompletableFuture<T> unit(T value) {
3792	+	return completedFuture(value);
3793	+	}
3794	+	// monadic zero ?
3795	+	static <T> CompletableFuture<T> zero() {
3796	+	return failedFuture(new ZeroException());
3797	+	}
3798	+	// >=>
3799	+	static <T,U,V> Function<T, CompletableFuture<V>> compose
3800	+	(Function<T, CompletableFuture<U>> f,
3801	+	Function<U, CompletableFuture<V>> g) {
3802	+	return (x) -> f.apply(x).thenCompose(g);
3803	+	}
3804	+
3805	+	static void assertZero(CompletableFuture<?> f) {
3806	+	try {
3807	+	f.getNow(null);
3808	+	throw new AssertionFailedError("should throw");
3809	+	} catch (CompletionException success) {
3810	+	assertTrue(success.getCause() instanceof ZeroException);
3811	+	}
3812	+	}
3813	+
3814	+	static <T> void assertFutureEquals(CompletableFuture<T> f,
3815	+	CompletableFuture<T> g) {
3816	+	T fval = null, gval = null;
3817	+	Throwable fex = null, gex = null;
3818	+
3819	+	try { fval = f.get(); }
3820	+	catch (ExecutionException ex) { fex = ex.getCause(); }
3821	+	catch (Throwable ex) { fex = ex; }
3822	+
3823	+	try { gval = g.get(); }
3824	+	catch (ExecutionException ex) { gex = ex.getCause(); }
3825	+	catch (Throwable ex) { gex = ex; }
3826	+
3827	+	if (fex != null || gex != null)
3828	+	assertSame(fex.getClass(), gex.getClass());
3829	+	else
3830	+	assertEquals(fval, gval);
3831	+	}
3832	+
3833	+	static class PlusFuture<T> extends CompletableFuture<T> {
3834	+	AtomicReference<Throwable> firstFailure = new AtomicReference<>(null);
3835	+	}
3836	+
3837	+	/** Implements "monadic plus". */
3838	+	static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f,
3839	+	CompletableFuture<? extends T> g) {
3840	+	PlusFuture<T> plus = new PlusFuture<T>();
3841	+	BiConsumer<T, Throwable> action = (T result, Throwable ex) -> {
3842	+	try {
3843	+	if (ex == null) {
3844	+	if (plus.complete(result))
3845	+	if (plus.firstFailure.get() != null)
3846	+	plus.firstFailure.set(null);
3847	+	}
3848	+	else if (plus.firstFailure.compareAndSet(null, ex)) {
3849	+	if (plus.isDone())
3850	+	plus.firstFailure.set(null);
3851	+	}
3852	+	else {
3853	+	// first failure has precedence
3854	+	Throwable first = plus.firstFailure.getAndSet(null);
3855	+
3856	+	// may fail with "Self-suppression not permitted"
3857	+	try { first.addSuppressed(ex); }
3858	+	catch (Exception ignored) {}
3859	+
3860	+	plus.completeExceptionally(first);
3861	+	}
3862	+	} catch (Throwable unexpected) {
3863	+	plus.completeExceptionally(unexpected);
3864	+	}
3865	+	};
3866	+	f.whenComplete(action);
3867	+	g.whenComplete(action);
3868	+	return plus;
3869	+	}
3870	+	}
3871	+
3872	+	/**
3873	+	* CompletableFuture is an additive monad - sort of.
3874	+	* https://en.wikipedia.org/wiki/Monad_(functional_programming)#Additive_monads
3875	+	*/
3876	+	public void testAdditiveMonad() throws Throwable {
3877	+	Function<Long, CompletableFuture<Long>> unit = Monad::unit;
3878	+	CompletableFuture<Long> zero = Monad.zero();
3879	+
3880	+	// Some mutually non-commutative functions
3881	+	Function<Long, CompletableFuture<Long>> triple
3882	+	= (x) -> Monad.unit(3 * x);
3883	+	Function<Long, CompletableFuture<Long>> inc
3884	+	= (x) -> Monad.unit(x + 1);
3885	+
3886	+	// unit is a right identity: m >>= unit === m
3887	+	Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
3888	+	inc.apply(5L));
3889	+	// unit is a left identity: (unit x) >>= f === f x
3890	+	Monad.assertFutureEquals(unit.apply(5L).thenCompose(inc),
3891	+	inc.apply(5L));
3892	+
3893	+	// associativity: (m >>= f) >>= g === m >>= ( \x -> (f x >>= g) )
3894	+	Monad.assertFutureEquals(
3895	+	unit.apply(5L).thenCompose(inc).thenCompose(triple),
3896	+	unit.apply(5L).thenCompose((x) -> inc.apply(x).thenCompose(triple)));
3897	+
3898	+	// The case for CompletableFuture as an additive monad is weaker...
3899	+
3900	+	// zero is a monadic zero
3901	+	Monad.assertZero(zero);
3902	+
3903	+	// left zero: zero >>= f === zero
3904	+	Monad.assertZero(zero.thenCompose(inc));
3905	+	// right zero: f >>= (\x -> zero) === zero
3906	+	Monad.assertZero(inc.apply(5L).thenCompose((x) -> zero));
3907	+
3908	+	// f plus zero === f
3909	+	Monad.assertFutureEquals(Monad.unit(5L),
3910	+	Monad.plus(Monad.unit(5L), zero));
3911	+	// zero plus f === f
3912	+	Monad.assertFutureEquals(Monad.unit(5L),
3913	+	Monad.plus(zero, Monad.unit(5L)));
3914	+	// zero plus zero === zero
3915	+	Monad.assertZero(Monad.plus(zero, zero));
3916	+	{
3917	+	CompletableFuture<Long> f = Monad.plus(Monad.unit(5L),
3918	+	Monad.unit(8L));
3919	+	// non-determinism
3920	+	assertTrue(f.get() == 5L || f.get() == 8L);
3921	+	}
3922	+
3923	+	CompletableFuture<Long> godot = new CompletableFuture<>();
3924	+	// f plus godot === f (doesn't wait for godot)
3925	+	Monad.assertFutureEquals(Monad.unit(5L),
3926	+	Monad.plus(Monad.unit(5L), godot));
3927	+	// godot plus f === f (doesn't wait for godot)
3928	+	Monad.assertFutureEquals(Monad.unit(5L),
3929	+	Monad.plus(godot, Monad.unit(5L)));
3930	+	}
3931	+
3932	+	/**
3933	+	* A single CompletableFuture with many dependents.
3934	+	* A demo of scalability - runtime is O(n).
3935	+	*/
3936	+	public void testManyDependents() throws Throwable {
3937	+	final int n = 1_000;
3938	+	final CompletableFuture<Void> head = new CompletableFuture<>();
3939	+	final CompletableFuture<Void> complete = CompletableFuture.completedFuture((Void)null);
3940	+	final AtomicInteger count = new AtomicInteger(0);
3941	+	for (int i = 0; i < n; i++) {
3942	+	head.thenRun(() -> count.getAndIncrement());
3943	+	head.thenAccept((x) -> count.getAndIncrement());
3944	+	head.thenApply((x) -> count.getAndIncrement());
3945	+
3946	+	head.runAfterBoth(complete, () -> count.getAndIncrement());
3947	+	head.thenAcceptBoth(complete, (x, y) -> count.getAndIncrement());
3948	+	head.thenCombine(complete, (x, y) -> count.getAndIncrement());
3949	+	complete.runAfterBoth(head, () -> count.getAndIncrement());
3950	+	complete.thenAcceptBoth(head, (x, y) -> count.getAndIncrement());
3951	+	complete.thenCombine(head, (x, y) -> count.getAndIncrement());
3952	+
3953	+	head.runAfterEither(new CompletableFuture<Void>(), () -> count.getAndIncrement());
3954	+	head.acceptEither(new CompletableFuture<Void>(), (x) -> count.getAndIncrement());
3955	+	head.applyToEither(new CompletableFuture<Void>(), (x) -> count.getAndIncrement());
3956	+	new CompletableFuture<Void>().runAfterEither(head, () -> count.getAndIncrement());
3957	+	new CompletableFuture<Void>().acceptEither(head, (x) -> count.getAndIncrement());
3958	+	new CompletableFuture<Void>().applyToEither(head, (x) -> count.getAndIncrement());
3959	+	}
3960	+	head.complete(null);
3961	+	assertEquals(5 * 3 * n, count.get());
3962	+	}
3963	+
3964	+	//     static <U> U join(CompletionStage<U> stage) {
3965	+	//         CompletableFuture<U> f = new CompletableFuture<>();
3966	+	//         stage.whenComplete((v, ex) -> {
3967	+	//             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
3968	+	//         });
3969	+	//         return f.join();
3970	+	//     }
3971	+
3972	+	//     static <U> boolean isDone(CompletionStage<U> stage) {
3973	+	//         CompletableFuture<U> f = new CompletableFuture<>();
3974	+	//         stage.whenComplete((v, ex) -> {
3975	+	//             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
3976	+	//         });
3977	+	//         return f.isDone();
3978	+	//     }
3979	+
3980	+	//     static <U> U join2(CompletionStage<U> stage) {
3981	+	//         return stage.toCompletableFuture().copy().join();
3982	+	//     }
3983	+
3984	+	//     static <U> boolean isDone2(CompletionStage<U> stage) {
3985	+	//         return stage.toCompletableFuture().copy().isDone();
3986	+	//     }
3987	+
3988		}

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines