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 1.105 by dl, Thu Sep 3 16:30:05 2015 UTC vs.
Revision 1.135 by jsr166, Sun Nov 15 20:03:08 2015 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 908 | Line 840 | public class CompletableFutureTest exten
840		if (!createIncomplete) assertTrue(f.complete(v1));
841		final CompletableFuture<Integer> g = f.exceptionally
842		((Throwable t) -> {
911	–	// Should not be called
843		a.getAndIncrement();
844	<	throw new AssertionError();
844	>	threadFail("should not be called");
845	>	return null;            // unreached
846		});
847		if (createIncomplete) assertTrue(f.complete(v1));
848
#	Line 969 | Line 901 | public class CompletableFutureTest exten
901		* whenComplete action executes on normal completion, propagating
902		* source result.
903		*/
904	<	public void testWhenComplete_normalCompletion1() {
904	>	public void testWhenComplete_normalCompletion() {
905		for (ExecutionMode m : ExecutionMode.values())
906		for (boolean createIncomplete : new boolean[] { true, false })
907		for (Integer v1 : new Integer[] { 1, null })
#	Line 979 | Line 911 | public class CompletableFutureTest exten
911		if (!createIncomplete) assertTrue(f.complete(v1));
912		final CompletableFuture<Integer> g = m.whenComplete
913		(f,
914	<	(Integer x, Throwable t) -> {
914	>	(Integer result, Throwable t) -> {
915		m.checkExecutionMode();
916	<	threadAssertSame(x, v1);
916	>	threadAssertSame(result, v1);
917		threadAssertNull(t);
918		a.getAndIncrement();
919		});
#	Line 1006 | Line 938 | public class CompletableFutureTest exten
938		if (!createIncomplete) f.completeExceptionally(ex);
939		final CompletableFuture<Integer> g = m.whenComplete
940		(f,
941	<	(Integer x, Throwable t) -> {
941	>	(Integer result, Throwable t) -> {
942		m.checkExecutionMode();
943	<	threadAssertNull(x);
943	>	threadAssertNull(result);
944		threadAssertSame(t, ex);
945		a.getAndIncrement();
946		});
#	Line 1033 | Line 965 | public class CompletableFutureTest exten
965		if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
966		final CompletableFuture<Integer> g = m.whenComplete
967		(f,
968	<	(Integer x, Throwable t) -> {
968	>	(Integer result, Throwable t) -> {
969		m.checkExecutionMode();
970	<	threadAssertNull(x);
970	>	threadAssertNull(result);
971		threadAssertTrue(t instanceof CancellationException);
972		a.getAndIncrement();
973		});
#	Line 1050 | Line 982 | public class CompletableFutureTest exten
982		* If a whenComplete action throws an exception when triggered by
983		* a normal completion, it completes exceptionally
984		*/
985	<	public void testWhenComplete_actionFailed() {
985	>	public void testWhenComplete_sourceCompletedNormallyActionFailed() {
986		for (boolean createIncomplete : new boolean[] { true, false })
987		for (ExecutionMode m : ExecutionMode.values())
988		for (Integer v1 : new Integer[] { 1, null })
#	Line 1061 | Line 993 | public class CompletableFutureTest exten
993		if (!createIncomplete) assertTrue(f.complete(v1));
994		final CompletableFuture<Integer> g = m.whenComplete
995		(f,
996	<	(Integer x, Throwable t) -> {
996	>	(Integer result, Throwable t) -> {
997		m.checkExecutionMode();
998	<	threadAssertSame(x, v1);
998	>	threadAssertSame(result, v1);
999		threadAssertNull(t);
1000		a.getAndIncrement();
1001		throw ex;
#	Line 1078 | Line 1010 | public class CompletableFutureTest exten
1010		/**
1011		* If a whenComplete action throws an exception when triggered by
1012		* a source completion that also throws an exception, the source
1013	<	* exception takes precedence.
1013	>	* exception takes precedence (unlike handle)
1014		*/
1015	<	public void testWhenComplete_actionFailedSourceFailed() {
1015	>	public void testWhenComplete_sourceFailedActionFailed() {
1016		for (boolean createIncomplete : new boolean[] { true, false })
1017		for (ExecutionMode m : ExecutionMode.values())
1018		{
#	Line 1092 | Line 1024 | public class CompletableFutureTest exten
1024		if (!createIncomplete) f.completeExceptionally(ex1);
1025		final CompletableFuture<Integer> g = m.whenComplete
1026		(f,
1027	<	(Integer x, Throwable t) -> {
1027	>	(Integer result, Throwable t) -> {
1028		m.checkExecutionMode();
1029		threadAssertSame(t, ex1);
1030	<	threadAssertNull(x);
1030	>	threadAssertNull(result);
1031		a.getAndIncrement();
1032		throw ex2;
1033		});
#	Line 1120 | Line 1052 | public class CompletableFutureTest exten
1052		if (!createIncomplete) assertTrue(f.complete(v1));
1053		final CompletableFuture<Integer> g = m.handle
1054		(f,
1055	<	(Integer x, Throwable t) -> {
1055	>	(Integer result, Throwable t) -> {
1056		m.checkExecutionMode();
1057	<	threadAssertSame(x, v1);
1057	>	threadAssertSame(result, v1);
1058		threadAssertNull(t);
1059		a.getAndIncrement();
1060		return inc(v1);
#	Line 1149 | Line 1081 | public class CompletableFutureTest exten
1081		if (!createIncomplete) f.completeExceptionally(ex);
1082		final CompletableFuture<Integer> g = m.handle
1083		(f,
1084	<	(Integer x, Throwable t) -> {
1084	>	(Integer result, Throwable t) -> {
1085		m.checkExecutionMode();
1086	<	threadAssertNull(x);
1086	>	threadAssertNull(result);
1087		threadAssertSame(t, ex);
1088		a.getAndIncrement();
1089		return v1;
#	Line 1178 | Line 1110 | public class CompletableFutureTest exten
1110		if (!createIncomplete) assertTrue(f.cancel(mayInterruptIfRunning));
1111		final CompletableFuture<Integer> g = m.handle
1112		(f,
1113	<	(Integer x, Throwable t) -> {
1113	>	(Integer result, Throwable t) -> {
1114		m.checkExecutionMode();
1115	<	threadAssertNull(x);
1115	>	threadAssertNull(result);
1116		threadAssertTrue(t instanceof CancellationException);
1117		a.getAndIncrement();
1118		return v1;
#	Line 1193 | Line 1125 | public class CompletableFutureTest exten
1125		}}
1126
1127		/**
1128	<	* handle result completes exceptionally if action does
1128	>	* If a "handle action" throws an exception when triggered by
1129	>	* a normal completion, it completes exceptionally
1130		*/
1131	<	public void testHandle_sourceFailedActionFailed() {
1131	>	public void testHandle_sourceCompletedNormallyActionFailed() {
1132		for (ExecutionMode m : ExecutionMode.values())
1133		for (boolean createIncomplete : new boolean[] { true, false })
1134	+	for (Integer v1 : new Integer[] { 1, null })
1135		{
1136		final CompletableFuture<Integer> f = new CompletableFuture<>();
1137		final AtomicInteger a = new AtomicInteger(0);
1138	<	final CFException ex1 = new CFException();
1139	<	final CFException ex2 = new CFException();
1206	<	if (!createIncomplete) f.completeExceptionally(ex1);
1138	>	final CFException ex = new CFException();
1139	>	if (!createIncomplete) assertTrue(f.complete(v1));
1140		final CompletableFuture<Integer> g = m.handle
1141		(f,
1142	<	(Integer x, Throwable t) -> {
1142	>	(Integer result, Throwable t) -> {
1143		m.checkExecutionMode();
1144	<	threadAssertNull(x);
1145	<	threadAssertSame(ex1, t);
1144	>	threadAssertSame(result, v1);
1145	>	threadAssertNull(t);
1146		a.getAndIncrement();
1147	<	throw ex2;
1147	>	throw ex;
1148		});
1149	<	if (createIncomplete) f.completeExceptionally(ex1);
1149	>	if (createIncomplete) assertTrue(f.complete(v1));
1150
1151	<	checkCompletedWithWrappedException(g, ex2);
1152	<	checkCompletedExceptionally(f, ex1);
1151	>	checkCompletedWithWrappedException(g, ex);
1152	>	checkCompletedNormally(f, v1);
1153		assertEquals(1, a.get());
1154		}}
1155
1156	<	public void testHandle_sourceCompletedNormallyActionFailed() {
1157	<	for (ExecutionMode m : ExecutionMode.values())
1156	>	/**
1157	>	* If a "handle action" throws an exception when triggered by
1158	>	* a source completion that also throws an exception, the action
1159	>	* exception takes precedence (unlike whenComplete)
1160	>	*/
1161	>	public void testHandle_sourceFailedActionFailed() {
1162		for (boolean createIncomplete : new boolean[] { true, false })
1163	<	for (Integer v1 : new Integer[] { 1, null })
1163	>	for (ExecutionMode m : ExecutionMode.values())
1164		{
1228	–	final CompletableFuture<Integer> f = new CompletableFuture<>();
1165		final AtomicInteger a = new AtomicInteger(0);
1166	<	final CFException ex = new CFException();
1167	<	if (!createIncomplete) assertTrue(f.complete(v1));
1166	>	final CFException ex1 = new CFException();
1167	>	final CFException ex2 = new CFException();
1168	>	final CompletableFuture<Integer> f = new CompletableFuture<>();
1169	>
1170	>	if (!createIncomplete) f.completeExceptionally(ex1);
1171		final CompletableFuture<Integer> g = m.handle
1172		(f,
1173	<	(Integer x, Throwable t) -> {
1173	>	(Integer result, Throwable t) -> {
1174		m.checkExecutionMode();
1175	<	threadAssertSame(x, v1);
1176	<	threadAssertNull(t);
1175	>	threadAssertNull(result);
1176	>	threadAssertSame(ex1, t);
1177		a.getAndIncrement();
1178	<	throw ex;
1178	>	throw ex2;
1179		});
1180	<	if (createIncomplete) assertTrue(f.complete(v1));
1180	>	if (createIncomplete) f.completeExceptionally(ex1);
1181
1182	<	checkCompletedWithWrappedException(g, ex);
1183	<	checkCompletedNormally(f, v1);
1182	>	checkCompletedWithWrappedException(g, ex2);
1183	>	checkCompletedExceptionally(f, ex1);
1184		assertEquals(1, a.get());
1185		}}
1186
#	Line 3142 | Line 3081 | public class CompletableFutureTest exten
3081		for (int i = 0; i < k; i++) {
3082		checkIncomplete(f);
3083		checkIncomplete(CompletableFuture.allOf(fs));
3084	<	if (i != k/2) {
3084	>	if (i != k / 2) {
3085		fs[i].complete(i);
3086		checkCompletedNormally(fs[i], i);
3087		} else {
#	Line 3333 | Line 3272 | public class CompletableFutureTest exten
3272		() -> f.exceptionally(null),
3273
3274		() -> f.handle(null),
3275	+
3276		() -> CompletableFuture.allOf((CompletableFuture<?>)null),
3277		() -> CompletableFuture.allOf((CompletableFuture<?>[])null),
3278		() -> CompletableFuture.allOf(f, null),
#	Line 3344 | Line 3284 | public class CompletableFutureTest exten
3284		() -> CompletableFuture.anyOf(null, f),
3285
3286		() -> f.obtrudeException(null),
3287	+
3288	+	() -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3289	+	() -> CompletableFuture.delayedExecutor(1L, null, new ThreadExecutor()),
3290	+	() -> CompletableFuture.delayedExecutor(1L, null),
3291	+
3292	+	() -> f.orTimeout(1L, null),
3293	+	() -> f.completeOnTimeout(42, 1L, null),
3294	+
3295	+	() -> CompletableFuture.failedFuture(null),
3296	+	() -> CompletableFuture.failedStage(null),
3297		};
3298
3299		assertThrows(NullPointerException.class, throwingActions);
#	Line 3364 | Line 3314 | public class CompletableFutureTest exten
3314		* newIncompleteFuture returns an incomplete CompletableFuture
3315		*/
3316		public void testNewIncompleteFuture() {
3317	+	for (Integer v1 : new Integer[] { 1, null })
3318	+	{
3319		CompletableFuture<Integer> f = new CompletableFuture<>();
3320		CompletableFuture<Integer> g = f.newIncompleteFuture();
3321		checkIncomplete(f);
3322		checkIncomplete(g);
3323	<	}
3323	>	f.complete(v1);
3324	>	checkCompletedNormally(f, v1);
3325	>	checkIncomplete(g);
3326	>	g.complete(v1);
3327	>	checkCompletedNormally(g, v1);
3328	>	assertSame(g.getClass(), CompletableFuture.class);
3329	>	}}
3330
3331		/**
3332		* completedStage returns a completed CompletionStage
3333		*/
3334		public void testCompletedStage() {
3335	<	AtomicInteger x = new AtomicInteger();
3335	>	AtomicInteger x = new AtomicInteger(0);
3336		AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3337		CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3338		f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
#	Line 3384 | Line 3342 | public class CompletableFutureTest exten
3342
3343		/**
3344		* defaultExecutor by default returns the commonPool if
3345	<	* it supports at least one thread.
3345	>	* it supports more than one thread.
3346		*/
3347		public void testDefaultExecutor() {
3348		CompletableFuture<Integer> f = new CompletableFuture<>();
3349		Executor e = f.defaultExecutor();
3350	<	Executor c =  ForkJoinPool.commonPool();
3350	>	Executor c = ForkJoinPool.commonPool();
3351		if (ForkJoinPool.getCommonPoolParallelism() > 1)
3352		assertSame(e, c);
3353	+	else
3354	+	assertNotSame(e, c);
3355		}
3356
3357		/**
#	Line 3401 | Line 3361 | public class CompletableFutureTest exten
3361		public void testFailedFuture() {
3362		CFException ex = new CFException();
3363		CompletableFuture<Integer> f = CompletableFuture.failedFuture(ex);
3364	<	checkCompletedExceptionallyWithRootCause(f, ex);
3364	>	checkCompletedExceptionally(f, ex);
3365		}
3366
3367		/**
3368		* failedFuture(null) throws NPE
3369		*/
3370	<	public void testFailedFuture2() {
3370	>	public void testFailedFuture_null() {
3371		try {
3372		CompletableFuture<Integer> f = CompletableFuture.failedFuture(null);
3373		shouldThrow();
#	Line 3440 | Line 3400 | public class CompletableFutureTest exten
3400		CFException ex = new CFException();
3401		f.completeExceptionally(ex);
3402		checkCompletedExceptionally(f, ex);
3403	<	checkCompletedWithWrappedCFException(g);
3403	>	checkCompletedWithWrappedException(g, ex);
3404		}
3405
3406		/**
#	Line 3450 | Line 3410 | public class CompletableFutureTest exten
3410		public void testMinimalCompletionStage() {
3411		CompletableFuture<Integer> f = new CompletableFuture<>();
3412		CompletionStage<Integer> g = f.minimalCompletionStage();
3413	<	AtomicInteger x = new AtomicInteger();
3413	>	AtomicInteger x = new AtomicInteger(0);
3414		AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3415		checkIncomplete(f);
3416		g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
#	Line 3467 | Line 3427 | public class CompletableFutureTest exten
3427		public void testMinimalCompletionStage2() {
3428		CompletableFuture<Integer> f = new CompletableFuture<>();
3429		CompletionStage<Integer> g = f.minimalCompletionStage();
3430	<	AtomicInteger x = new AtomicInteger();
3430	>	AtomicInteger x = new AtomicInteger(0);
3431		AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3432		g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3433		checkIncomplete(f);
#	Line 3479 | Line 3439 | public class CompletableFutureTest exten
3439		}
3440
3441		/**
3442	<	* failedStage returns a Completionstage completed
3442	>	* failedStage returns a CompletionStage completed
3443		* exceptionally with the given Exception
3444		*/
3445		public void testFailedStage() {
3446		CFException ex = new CFException();
3447		CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3448	<	AtomicInteger x = new AtomicInteger();
3448	>	AtomicInteger x = new AtomicInteger(0);
3449		AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3450		f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3451		assertEquals(x.get(), 0);
3452	<	assertEquals(r.get().getCause(), ex);
3452	>	assertEquals(r.get(), ex);
3453		}
3454
3455		/**
3456		* completeAsync completes with value of given supplier
3457		*/
3458		public void testCompleteAsync() {
3459	+	for (Integer v1 : new Integer[] { 1, null })
3460	+	{
3461		CompletableFuture<Integer> f = new CompletableFuture<>();
3462	<	f.completeAsync(() -> 1);
3462	>	f.completeAsync(() -> v1);
3463		f.join();
3464	<	checkCompletedNormally(f, 1);
3465	<	}
3464	>	checkCompletedNormally(f, v1);
3465	>	}}
3466
3467		/**
3468		* completeAsync completes exceptionally if given supplier throws
#	Line 3512 | Line 3474 | public class CompletableFutureTest exten
3474		try {
3475		f.join();
3476		shouldThrow();
3477	<	} catch (Exception success) {}
3478	<	checkCompletedWithWrappedCFException(f);
3477	>	} catch (CompletionException success) {}
3478	>	checkCompletedWithWrappedException(f, ex);
3479		}
3480
3481		/**
3482		* completeAsync with given executor completes with value of given supplier
3483		*/
3484		public void testCompleteAsync3() {
3485	+	for (Integer v1 : new Integer[] { 1, null })
3486	+	{
3487		CompletableFuture<Integer> f = new CompletableFuture<>();
3488	<	f.completeAsync(() -> 1, new ThreadExecutor());
3489	<	f.join();
3490	<	checkCompletedNormally(f, 1);
3491	<	}
3488	>	ThreadExecutor executor = new ThreadExecutor();
3489	>	f.completeAsync(() -> v1, executor);
3490	>	assertSame(v1, f.join());
3491	>	checkCompletedNormally(f, v1);
3492	>	assertEquals(1, executor.count.get());
3493	>	}}
3494
3495		/**
3496		* completeAsync with given executor completes exceptionally if
#	Line 3533 | Line 3499 | public class CompletableFutureTest exten
3499		public void testCompleteAsync4() {
3500		CompletableFuture<Integer> f = new CompletableFuture<>();
3501		CFException ex = new CFException();
3502	<	f.completeAsync(() -> {if (true) throw ex; return 1;}, new ThreadExecutor());
3502	>	ThreadExecutor executor = new ThreadExecutor();
3503	>	f.completeAsync(() -> {if (true) throw ex; return 1;}, executor);
3504		try {
3505		f.join();
3506		shouldThrow();
3507	<	} catch (Exception success) {}
3508	<	checkCompletedWithWrappedCFException(f);
3507	>	} catch (CompletionException success) {}
3508	>	checkCompletedWithWrappedException(f, ex);
3509	>	assertEquals(1, executor.count.get());
3510		}
3511
3512		/**
3513	<	*  orTimeout completes with TimeoutException if not complete
3513	>	* orTimeout completes with TimeoutException if not complete
3514		*/
3515	<	public void testOrTimeout() {
3515	>	public void testOrTimeout_timesOut() {
3516	>	long timeoutMillis = timeoutMillis();
3517		CompletableFuture<Integer> f = new CompletableFuture<>();
3518	<	f.orTimeout(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
3519	<	checkCompletedExceptionallyWithTimeout(f);
3518	>	long startTime = System.nanoTime();
3519	>	f.orTimeout(timeoutMillis, MILLISECONDS);
3520	>	checkCompletedWithTimeoutException(f);
3521	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3522		}
3523
3524		/**
3525	<	*  orTimeout completes normally if completed before timeout
3525	>	* orTimeout completes normally if completed before timeout
3526		*/
3527	<	public void testOrTimeout2() {
3527	>	public void testOrTimeout_completed() {
3528	>	for (Integer v1 : new Integer[] { 1, null })
3529	>	{
3530		CompletableFuture<Integer> f = new CompletableFuture<>();
3531	<	f.complete(1);
3532	<	f.orTimeout(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
3533	<	checkCompletedNormally(f, 1);
3534	<	}
3531	>	CompletableFuture<Integer> g = new CompletableFuture<>();
3532	>	long startTime = System.nanoTime();
3533	>	f.complete(v1);
3534	>	f.orTimeout(LONG_DELAY_MS, MILLISECONDS);
3535	>	g.orTimeout(LONG_DELAY_MS, MILLISECONDS);
3536	>	g.complete(v1);
3537	>	checkCompletedNormally(f, v1);
3538	>	checkCompletedNormally(g, v1);
3539	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3540	>	}}
3541
3542		/**
3543	<	*  completeOnTimeout completes with given value if not complete
3543	>	* completeOnTimeout completes with given value if not complete
3544		*/
3545	<	public void testCompleteOnTimeout() {
3545	>	public void testCompleteOnTimeout_timesOut() {
3546	>	testInParallel(() -> testCompleteOnTimeout_timesOut(42),
3547	>	() -> testCompleteOnTimeout_timesOut(null));
3548	>	}
3549	>
3550	>	public void testCompleteOnTimeout_timesOut(Integer v) {
3551	>	long timeoutMillis = timeoutMillis();
3552		CompletableFuture<Integer> f = new CompletableFuture<>();
3553	<	f.completeOnTimeout(-1, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
3554	<	f.join();
3555	<	checkCompletedNormally(f, -1);
3553	>	long startTime = System.nanoTime();
3554	>	f.completeOnTimeout(v, timeoutMillis, MILLISECONDS);
3555	>	assertSame(v, f.join());
3556	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3557	>	f.complete(99);         // should have no effect
3558	>	checkCompletedNormally(f, v);
3559		}
3560
3561		/**
3562	<	*  completeOnTimeout has no effect if completed within timeout
3562	>	* completeOnTimeout has no effect if completed within timeout
3563		*/
3564	<	public void testCompleteOnTimeout2() {
3564	>	public void testCompleteOnTimeout_completed() {
3565	>	for (Integer v1 : new Integer[] { 1, null })
3566	>	{
3567		CompletableFuture<Integer> f = new CompletableFuture<>();
3568	<	f.complete(1);
3569	<	f.completeOnTimeout(-1, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
3570	<	checkCompletedNormally(f, 1);
3571	<	}
3568	>	CompletableFuture<Integer> g = new CompletableFuture<>();
3569	>	long startTime = System.nanoTime();
3570	>	f.complete(v1);
3571	>	f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS);
3572	>	g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS);
3573	>	g.complete(v1);
3574	>	checkCompletedNormally(f, v1);
3575	>	checkCompletedNormally(g, v1);
3576	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3577	>	}}
3578
3579		/**
3580		* delayedExecutor returns an executor that delays submission
3581		*/
3582		public void testDelayedExecutor() {
3583	<	long timeoutMillis = SMALL_DELAY_MS;
3584	<	Executor d = CompletableFuture.delayedExecutor(timeoutMillis,
3585	<	MILLISECONDS);
3583	>	testInParallel(() -> testDelayedExecutor(null, null),
3584	>	() -> testDelayedExecutor(null, 1),
3585	>	() -> testDelayedExecutor(new ThreadExecutor(), 1),
3586	>	() -> testDelayedExecutor(new ThreadExecutor(), 1));
3587	>	}
3588	>
3589	>	public void testDelayedExecutor(Executor executor, Integer v) throws Exception {
3590	>	long timeoutMillis = timeoutMillis();
3591	>	// Use an "unreasonably long" long timeout to catch lingering threads
3592	>	long longTimeoutMillis = 1000 * 60 * 60 * 24;
3593	>	final Executor delayer, longDelayer;
3594	>	if (executor == null) {
3595	>	delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS);
3596	>	longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS);
3597	>	} else {
3598	>	delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS, executor);
3599	>	longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS, executor);
3600	>	}
3601		long startTime = System.nanoTime();
3602	<	CompletableFuture<Integer> f = CompletableFuture.supplyAsync(() -> 1, d);
3603	<	assertNull(f.getNow(null));
3604	<	try {
3605	<	f.get(LONG_DELAY_MS, MILLISECONDS);
3606	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
3607	<	assertTrue(millisElapsedSince(startTime) > timeoutMillis/2);
3608	<	checkCompletedNormally(f, 1);
3609	<	}
3602	>	CompletableFuture<Integer> f =
3603	>	CompletableFuture.supplyAsync(() -> v, delayer);
3604	>	CompletableFuture<Integer> g =
3605	>	CompletableFuture.supplyAsync(() -> v, longDelayer);
3606	>
3607	>	assertNull(g.getNow(null));
3608	>
3609	>	assertSame(v, f.get(LONG_DELAY_MS, MILLISECONDS));
3610	>	long millisElapsed = millisElapsedSince(startTime);
3611	>	assertTrue(millisElapsed >= timeoutMillis);
3612	>	assertTrue(millisElapsed < LONG_DELAY_MS / 2);
3613
3614	<	/**
3615	<	* delayedExecutor for a given executor returns an executor that
3616	<	* delays submission
3617	<	*/
3604	<	public void testDelayedExecutor2() {
3605	<	long timeoutMillis = SMALL_DELAY_MS;
3606	<	Executor d = CompletableFuture.delayedExecutor(timeoutMillis,
3607	<	MILLISECONDS,
3608	<	new ThreadExecutor());
3609	<	long startTime = System.nanoTime();
3610	<	CompletableFuture<Integer> f = CompletableFuture.supplyAsync(() -> 1, d);
3611	<	assertNull(f.getNow(null));
3612	<	try {
3613	<	f.get(LONG_DELAY_MS, MILLISECONDS);
3614	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
3615	<	assertTrue(millisElapsedSince(startTime) > timeoutMillis/2);
3616	<	checkCompletedNormally(f, 1);
3614	>	checkCompletedNormally(f, v);
3615	>
3616	>	checkIncomplete(g);
3617	>	assertTrue(g.cancel(true));
3618		}
3619
3620		//--- tests of implementation details; not part of official tck ---
#	Line 3650 | Line 3651 | public class CompletableFutureTest exten
3651		funs.add((y) -> m.thenAcceptBoth(y, v42, new SubtractAction(m)));
3652		funs.add((y) -> m.thenCombine(y, v42, new SubtractFunction(m)));
3653
3654	<	funs.add((y) -> m.whenComplete(y, (Integer x, Throwable t) -> {}));
3654	>	funs.add((y) -> m.whenComplete(y, (Integer r, Throwable t) -> {}));
3655
3656		funs.add((y) -> m.thenCompose(y, new CompletableFutureInc(m)));
3657
#	Line 3706 | Line 3707 | public class CompletableFutureTest exten
3707		}
3708		}}
3709
3710	+	/**
3711	+	* Minimal completion stages throw UOE for all non-CompletionStage methods
3712	+	*/
3713	+	public void testMinimalCompletionStage_minimality() {
3714	+	if (!testImplementationDetails) return;
3715	+	Function<Method, String> toSignature =
3716	+	(method) -> method.getName() + Arrays.toString(method.getParameterTypes());
3717	+	Predicate<Method> isNotStatic =
3718	+	(method) -> (method.getModifiers() & Modifier.STATIC) == 0;
3719	+	List<Method> minimalMethods =
3720	+	Stream.of(Object.class, CompletionStage.class)
3721	+	.flatMap((klazz) -> Stream.of(klazz.getMethods()))
3722	+	.filter(isNotStatic)
3723	+	.collect(Collectors.toList());
3724	+	// Methods from CompletableFuture permitted NOT to throw UOE
3725	+	String[] signatureWhitelist = {
3726	+	"newIncompleteFuture[]",
3727	+	"defaultExecutor[]",
3728	+	"minimalCompletionStage[]",
3729	+	"copy[]",
3730	+	};
3731	+	Set<String> permittedMethodSignatures =
3732	+	Stream.concat(minimalMethods.stream().map(toSignature),
3733	+	Stream.of(signatureWhitelist))
3734	+	.collect(Collectors.toSet());
3735	+	List<Method> allMethods = Stream.of(CompletableFuture.class.getMethods())
3736	+	.filter(isNotStatic)
3737	+	.filter((method) -> !permittedMethodSignatures.contains(toSignature.apply(method)))
3738	+	.collect(Collectors.toList());
3739	+
3740	+	CompletionStage<Integer> minimalStage =
3741	+	new CompletableFuture<Integer>().minimalCompletionStage();
3742	+
3743	+	List<Method> bugs = new ArrayList<>();
3744	+	for (Method method : allMethods) {
3745	+	Class<?>[] parameterTypes = method.getParameterTypes();
3746	+	Object[] args = new Object[parameterTypes.length];
3747	+	// Manufacture boxed primitives for primitive params
3748	+	for (int i = 0; i < args.length; i++) {
3749	+	Class<?> type = parameterTypes[i];
3750	+	if (parameterTypes[i] == boolean.class)
3751	+	args[i] = false;
3752	+	else if (parameterTypes[i] == int.class)
3753	+	args[i] = 0;
3754	+	else if (parameterTypes[i] == long.class)
3755	+	args[i] = 0L;
3756	+	}
3757	+	try {
3758	+	method.invoke(minimalStage, args);
3759	+	bugs.add(method);
3760	+	}
3761	+	catch (java.lang.reflect.InvocationTargetException expected) {
3762	+	if (! (expected.getCause() instanceof UnsupportedOperationException)) {
3763	+	bugs.add(method);
3764	+	// expected.getCause().printStackTrace();
3765	+	}
3766	+	}
3767	+	catch (ReflectiveOperationException bad) { throw new Error(bad); }
3768	+	}
3769	+	if (!bugs.isEmpty())
3770	+	throw new Error("Methods did not throw UOE: " + bugs.toString());
3771	+	}
3772	+
3773	+	static class Monad {
3774	+	static class ZeroException extends RuntimeException {
3775	+	public ZeroException() { super("monadic zero"); }
3776	+	}
3777	+	// "return", "unit"
3778	+	static <T> CompletableFuture<T> unit(T value) {
3779	+	return completedFuture(value);
3780	+	}
3781	+	// monadic zero ?
3782	+	static <T> CompletableFuture<T> zero() {
3783	+	return failedFuture(new ZeroException());
3784	+	}
3785	+	// >=>
3786	+	static <T,U,V> Function<T, CompletableFuture<V>> compose
3787	+	(Function<T, CompletableFuture<U>> f,
3788	+	Function<U, CompletableFuture<V>> g) {
3789	+	return (x) -> f.apply(x).thenCompose(g);
3790	+	}
3791	+
3792	+	static void assertZero(CompletableFuture<?> f) {
3793	+	try {
3794	+	f.getNow(null);
3795	+	throw new AssertionFailedError("should throw");
3796	+	} catch (CompletionException success) {
3797	+	assertTrue(success.getCause() instanceof ZeroException);
3798	+	}
3799	+	}
3800	+
3801	+	static <T> void assertFutureEquals(CompletableFuture<T> f,
3802	+	CompletableFuture<T> g) {
3803	+	T fval = null, gval = null;
3804	+	Throwable fex = null, gex = null;
3805	+
3806	+	try { fval = f.get(); }
3807	+	catch (ExecutionException ex) { fex = ex.getCause(); }
3808	+	catch (Throwable ex) { fex = ex; }
3809	+
3810	+	try { gval = g.get(); }
3811	+	catch (ExecutionException ex) { gex = ex.getCause(); }
3812	+	catch (Throwable ex) { gex = ex; }
3813	+
3814	+	if (fex != null || gex != null)
3815	+	assertSame(fex.getClass(), gex.getClass());
3816	+	else
3817	+	assertEquals(fval, gval);
3818	+	}
3819	+
3820	+	static class PlusFuture<T> extends CompletableFuture<T> {
3821	+	AtomicReference<Throwable> firstFailure = new AtomicReference<>(null);
3822	+	}
3823	+
3824	+	// Monadic "plus"
3825	+	static <T> CompletableFuture<T> plus(CompletableFuture<? extends T> f,
3826	+	CompletableFuture<? extends T> g) {
3827	+	PlusFuture<T> plus = new PlusFuture<T>();
3828	+	BiConsumer<T, Throwable> action = (T result, Throwable ex) -> {
3829	+	if (ex == null) {
3830	+	if (plus.complete(result))
3831	+	if (plus.firstFailure.get() != null)
3832	+	plus.firstFailure.set(null);
3833	+	}
3834	+	else if (plus.firstFailure.compareAndSet(null, ex)) {
3835	+	if (plus.isDone())
3836	+	plus.firstFailure.set(null);
3837	+	}
3838	+	else {
3839	+	// first failure has precedence
3840	+	Throwable first = plus.firstFailure.getAndSet(null);
3841	+
3842	+	// may fail with "Self-suppression not permitted"
3843	+	try { first.addSuppressed(ex); }
3844	+	catch (Exception ignored) {}
3845	+
3846	+	plus.completeExceptionally(first);
3847	+	}
3848	+	};
3849	+	f.whenComplete(action);
3850	+	g.whenComplete(action);
3851	+	return plus;
3852	+	}
3853	+	}
3854	+
3855	+	/**
3856	+	* CompletableFuture is an additive monad - sort of.
3857	+	* https://en.wikipedia.org/wiki/Monad_(functional_programming)#Additive_monads
3858	+	*/
3859	+	public void testAdditiveMonad() throws Throwable {
3860	+	Function<Long, CompletableFuture<Long>> unit = Monad::unit;
3861	+	CompletableFuture<Long> zero = Monad.zero();
3862	+
3863	+	// Some mutually non-commutative functions
3864	+	Function<Long, CompletableFuture<Long>> triple
3865	+	= (x) -> Monad.unit(3 * x);
3866	+	Function<Long, CompletableFuture<Long>> inc
3867	+	= (x) -> Monad.unit(x + 1);
3868	+
3869	+	// unit is a right identity: m >>= unit === m
3870	+	Monad.assertFutureEquals(inc.apply(5L).thenCompose(unit),
3871	+	inc.apply(5L));
3872	+	// unit is a left identity: (unit x) >>= f === f x
3873	+	Monad.assertFutureEquals(unit.apply(5L).thenCompose(inc),
3874	+	inc.apply(5L));
3875	+
3876	+	// associativity: (m >>= f) >>= g === m >>= ( \x -> (f x >>= g) )
3877	+	Monad.assertFutureEquals(
3878	+	unit.apply(5L).thenCompose(inc).thenCompose(triple),
3879	+	unit.apply(5L).thenCompose((x) -> inc.apply(x).thenCompose(triple)));
3880	+
3881	+	// The case for CompletableFuture as an additive monad is weaker...
3882	+
3883	+	// zero is a monadic zero
3884	+	Monad.assertZero(zero);
3885	+
3886	+	// left zero: zero >>= f === zero
3887	+	Monad.assertZero(zero.thenCompose(inc));
3888	+	// right zero: f >>= (\x -> zero) === zero
3889	+	Monad.assertZero(inc.apply(5L).thenCompose((x) -> zero));
3890	+
3891	+	// f plus zero === f
3892	+	Monad.assertFutureEquals(Monad.unit(5L),
3893	+	Monad.plus(Monad.unit(5L), zero));
3894	+	// zero plus f === f
3895	+	Monad.assertFutureEquals(Monad.unit(5L),
3896	+	Monad.plus(zero, Monad.unit(5L)));
3897	+	// zero plus zero === zero
3898	+	Monad.assertZero(Monad.plus(zero, zero));
3899	+	{
3900	+	CompletableFuture<Long> f = Monad.plus(Monad.unit(5L),
3901	+	Monad.unit(8L));
3902	+	// non-determinism
3903	+	assertTrue(f.get() == 5L || f.get() == 8L);
3904	+	}
3905	+
3906	+	CompletableFuture<Long> godot = new CompletableFuture<>();
3907	+	// f plus godot === f (doesn't wait for godot)
3908	+	Monad.assertFutureEquals(Monad.unit(5L),
3909	+	Monad.plus(Monad.unit(5L), godot));
3910	+	// godot plus f === f (doesn't wait for godot)
3911	+	Monad.assertFutureEquals(Monad.unit(5L),
3912	+	Monad.plus(godot, Monad.unit(5L)));
3913	+	}
3914	+
3915	+	//     static <U> U join(CompletionStage<U> stage) {
3916	+	//         CompletableFuture<U> f = new CompletableFuture<>();
3917	+	//         stage.whenComplete((v, ex) -> {
3918	+	//             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
3919	+	//         });
3920	+	//         return f.join();
3921	+	//     }
3922	+
3923	+	//     static <U> boolean isDone(CompletionStage<U> stage) {
3924	+	//         CompletableFuture<U> f = new CompletableFuture<>();
3925	+	//         stage.whenComplete((v, ex) -> {
3926	+	//             if (ex != null) f.completeExceptionally(ex); else f.complete(v);
3927	+	//         });
3928	+	//         return f.isDone();
3929	+	//     }
3930	+
3931	+	//     static <U> U join2(CompletionStage<U> stage) {
3932	+	//         return stage.toCompletableFuture().copy().join();
3933	+	//     }
3934	+
3935	+	//     static <U> boolean isDone2(CompletionStage<U> stage) {
3936	+	//         return stage.toCompletableFuture().copy().isDone();
3937	+	//     }
3938	+
3939		}

Diff Legend

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