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Comparing jsr166/src/test/tck/CompletableFutureTest.java (file contents):
Revision 1.93 by jsr166, Tue Jun 17 21:09:56 2014 UTC vs.
Revision 1.121 by jsr166, Sun Sep 6 21:14:12 2015 UTC

#	Line 5 | Line 5
5		* http://creativecommons.org/publicdomain/zero/1.0/
6		*/
7
8	<	import junit.framework.*;
8	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
9	>	import static java.util.concurrent.TimeUnit.SECONDS;
10	>
11	>	import java.util.ArrayList;
12	>	import java.util.List;
13	>	import java.util.Objects;
14		import java.util.concurrent.Callable;
10	–	import java.util.concurrent.Executor;
11	–	import java.util.concurrent.ExecutorService;
12	–	import java.util.concurrent.Executors;
15		import java.util.concurrent.CancellationException;
14	–	import java.util.concurrent.CountDownLatch;
15	–	import java.util.concurrent.ExecutionException;
16	–	import java.util.concurrent.Future;
16		import java.util.concurrent.CompletableFuture;
17		import java.util.concurrent.CompletionException;
18		import java.util.concurrent.CompletionStage;
19	+	import java.util.concurrent.ExecutionException;
20	+	import java.util.concurrent.Executor;
21		import java.util.concurrent.ForkJoinPool;
22		import java.util.concurrent.ForkJoinTask;
23		import java.util.concurrent.TimeoutException;
24	+	import java.util.concurrent.TimeUnit;
25		import java.util.concurrent.atomic.AtomicInteger;
26	<	import static java.util.concurrent.TimeUnit.MILLISECONDS;
25	<	import static java.util.concurrent.TimeUnit.SECONDS;
26	<	import java.util.*;
27	<	import java.util.function.Supplier;
28	<	import java.util.function.Consumer;
26	>	import java.util.concurrent.atomic.AtomicReference;
27		import java.util.function.BiConsumer;
30	–	import java.util.function.Function;
28		import java.util.function.BiFunction;
29	+	import java.util.function.Consumer;
30	+	import java.util.function.Function;
31	+	import java.util.function.Supplier;
32	+
33	+	import junit.framework.Test;
34	+	import junit.framework.TestSuite;
35
36		public class CompletableFutureTest extends JSR166TestCase {
37
38		public static void main(String[] args) {
39	<	junit.textui.TestRunner.run(suite());
39	>	main(suite(), args);
40		}
41		public static Test suite() {
42		return new TestSuite(CompletableFutureTest.class);
#	Line 44 | Line 47 | public class CompletableFutureTest exten
47		void checkIncomplete(CompletableFuture<?> f) {
48		assertFalse(f.isDone());
49		assertFalse(f.isCancelled());
50	<	assertTrue(f.toString().contains("[Not completed]"));
50	>	assertTrue(f.toString().contains("Not completed"));
51		try {
52		assertNull(f.getNow(null));
53		} catch (Throwable fail) { threadUnexpectedException(fail); }
#	Line 57 | Line 60 | public class CompletableFutureTest exten
60		}
61
62		<T> void checkCompletedNormally(CompletableFuture<T> f, T value) {
63	<	try {
64	<	assertEquals(value, f.get(LONG_DELAY_MS, MILLISECONDS));
62	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
63	>	checkTimedGet(f, value);
64	>
65		try {
66		assertEquals(value, f.join());
67		} catch (Throwable fail) { threadUnexpectedException(fail); }
#	Line 75 | Line 77 | public class CompletableFutureTest exten
77		assertTrue(f.toString().contains("[Completed normally]"));
78		}
79
80	<	void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
81	<	try {
82	<	f.get(LONG_DELAY_MS, MILLISECONDS);
83	<	shouldThrow();
84	<	} catch (ExecutionException success) {
85	<	assertTrue(success.getCause() instanceof CFException);
86	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
87	<	try {
88	<	f.join();
89	<	shouldThrow();
90	<	} catch (CompletionException success) {
91	<	assertTrue(success.getCause() instanceof CFException);
92	<	}
93	<	try {
94	<	f.getNow(null);
95	<	shouldThrow();
96	<	} catch (CompletionException success) {
95	<	assertTrue(success.getCause() instanceof CFException);
80	>	/**
81	>	* Returns the "raw" internal exceptional completion of f,
82	>	* without any additional wrapping with CompletionException.
83	>	*/
84	>	<U> Throwable exceptionalCompletion(CompletableFuture<U> f) {
85	>	// handle (and whenComplete) can distinguish between "direct"
86	>	// and "wrapped" exceptional completion
87	>	return f.handle((U u, Throwable t) -> t).join();
88	>	}
89	>
90	>	void checkCompletedExceptionally(CompletableFuture<?> f,
91	>	boolean wrapped,
92	>	Consumer<Throwable> checker) {
93	>	Throwable cause = exceptionalCompletion(f);
94	>	if (wrapped) {
95	>	assertTrue(cause instanceof CompletionException);
96	>	cause = cause.getCause();
97		}
98	<	try {
98	<	f.get();
99	<	shouldThrow();
100	<	} catch (ExecutionException success) {
101	<	assertTrue(success.getCause() instanceof CFException);
102	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
103	<	assertTrue(f.isDone());
104	<	assertFalse(f.isCancelled());
105	<	assertTrue(f.toString().contains("[Completed exceptionally]"));
106	<	}
98	>	checker.accept(cause);
99
100	<	<U> void checkCompletedExceptionallyWithRootCause(CompletableFuture<U> f,
109	<	Throwable ex) {
100	>	long startTime = System.nanoTime();
101		try {
102		f.get(LONG_DELAY_MS, MILLISECONDS);
103		shouldThrow();
104		} catch (ExecutionException success) {
105	<	assertSame(ex, success.getCause());
105	>	assertSame(cause, success.getCause());
106		} catch (Throwable fail) { threadUnexpectedException(fail); }
107	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
108	+
109		try {
110		f.join();
111		shouldThrow();
112		} catch (CompletionException success) {
113	<	assertSame(ex, success.getCause());
114	<	}
113	>	assertSame(cause, success.getCause());
114	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
115	>
116		try {
117		f.getNow(null);
118		shouldThrow();
119		} catch (CompletionException success) {
120	<	assertSame(ex, success.getCause());
121	<	}
120	>	assertSame(cause, success.getCause());
121	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
122	>
123		try {
124		f.get();
125		shouldThrow();
126		} catch (ExecutionException success) {
127	<	assertSame(ex, success.getCause());
127	>	assertSame(cause, success.getCause());
128		} catch (Throwable fail) { threadUnexpectedException(fail); }
129
135	–	assertTrue(f.isDone());
130		assertFalse(f.isCancelled());
131	+	assertTrue(f.isDone());
132	+	assertTrue(f.isCompletedExceptionally());
133		assertTrue(f.toString().contains("[Completed exceptionally]"));
134		}
135
136	<	<U> void checkCompletedWithWrappedException(CompletableFuture<U> f,
137	<	Throwable ex) {
138	<	checkCompletedExceptionallyWithRootCause(f, ex);
143	<	try {
144	<	CompletableFuture<Throwable> spy = f.handle
145	<	((U u, Throwable t) -> t);
146	<	assertTrue(spy.join() instanceof CompletionException);
147	<	assertSame(ex, spy.join().getCause());
148	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
136	>	void checkCompletedWithWrappedCFException(CompletableFuture<?> f) {
137	>	checkCompletedExceptionally(f, true,
138	>	(t) -> assertTrue(t instanceof CFException));
139		}
140
141	<	<U> void checkCompletedExceptionally(CompletableFuture<U> f, Throwable ex) {
142	<	checkCompletedExceptionallyWithRootCause(f, ex);
143	<	try {
144	<	CompletableFuture<Throwable> spy = f.handle
145	<	((U u, Throwable t) -> t);
146	<	assertSame(ex, spy.join());
147	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
141	>	void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
142	>	checkCompletedExceptionally(f, true,
143	>	(t) -> assertTrue(t instanceof CancellationException));
144	>	}
145	>
146	>	void checkCompletedWithTimeoutException(CompletableFuture<?> f) {
147	>	checkCompletedExceptionally(f, false,
148	>	(t) -> assertTrue(t instanceof TimeoutException));
149	>	}
150	>
151	>	void checkCompletedWithWrappedException(CompletableFuture<?> f,
152	>	Throwable ex) {
153	>	checkCompletedExceptionally(f, true, (t) -> assertSame(t, ex));
154	>	}
155	>
156	>	void checkCompletedExceptionally(CompletableFuture<?> f, Throwable ex) {
157	>	checkCompletedExceptionally(f, false, (t) -> assertSame(t, ex));
158		}
159
160		void checkCancelled(CompletableFuture<?> f) {
161	+	long startTime = System.nanoTime();
162		try {
163		f.get(LONG_DELAY_MS, MILLISECONDS);
164		shouldThrow();
165		} catch (CancellationException success) {
166		} catch (Throwable fail) { threadUnexpectedException(fail); }
167	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
168	+
169		try {
170		f.join();
171		shouldThrow();
#	Line 176 | Line 179 | public class CompletableFutureTest exten
179		shouldThrow();
180		} catch (CancellationException success) {
181		} catch (Throwable fail) { threadUnexpectedException(fail); }
179	–	assertTrue(f.isDone());
180	–	assertTrue(f.isCompletedExceptionally());
181	–	assertTrue(f.isCancelled());
182	–	assertTrue(f.toString().contains("[Completed exceptionally]"));
183	–	}
182
183	<	void checkCompletedWithWrappedCancellationException(CompletableFuture<?> f) {
184	<	try {
187	<	f.get(LONG_DELAY_MS, MILLISECONDS);
188	<	shouldThrow();
189	<	} catch (ExecutionException success) {
190	<	assertTrue(success.getCause() instanceof CancellationException);
191	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
192	<	try {
193	<	f.join();
194	<	shouldThrow();
195	<	} catch (CompletionException success) {
196	<	assertTrue(success.getCause() instanceof CancellationException);
197	<	}
198	<	try {
199	<	f.getNow(null);
200	<	shouldThrow();
201	<	} catch (CompletionException success) {
202	<	assertTrue(success.getCause() instanceof CancellationException);
203	<	}
204	<	try {
205	<	f.get();
206	<	shouldThrow();
207	<	} catch (ExecutionException success) {
208	<	assertTrue(success.getCause() instanceof CancellationException);
209	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
183	>	assertTrue(exceptionalCompletion(f) instanceof CancellationException);
184	>
185		assertTrue(f.isDone());
211	–	assertFalse(f.isCancelled());
186		assertTrue(f.isCompletedExceptionally());
187	+	assertTrue(f.isCancelled());
188		assertTrue(f.toString().contains("[Completed exceptionally]"));
189		}
190
#	Line 257 | Line 232 | public class CompletableFutureTest exten
232		{
233		CompletableFuture<Integer> f = new CompletableFuture<>();
234		checkIncomplete(f);
235	<	assertTrue(f.cancel(true));
236	<	assertTrue(f.cancel(true));
235	>	assertTrue(f.cancel(mayInterruptIfRunning));
236	>	assertTrue(f.cancel(mayInterruptIfRunning));
237	>	assertTrue(f.cancel(!mayInterruptIfRunning));
238		checkCancelled(f);
239		}}
240
#	Line 530 | Line 506 | public class CompletableFutureTest exten
506		}
507		}
508
533	–
509		class CompletableFutureInc extends CheckedIntegerAction
510		implements Function<Integer, CompletableFuture<Integer>>
511		{
#	Line 569 | Line 544 | public class CompletableFutureTest exten
544		}
545		}
546
547	+	static final boolean defaultExecutorIsCommonPool
548	+	= ForkJoinPool.getCommonPoolParallelism() > 1;
549	+
550		/**
551		* Permits the testing of parallel code for the 3 different
552		* execution modes without copy/pasting all the test methods.
553		*/
554		enum ExecutionMode {
555	<	DEFAULT {
555	>	SYNC {
556		public void checkExecutionMode() {
557		assertFalse(ThreadExecutor.startedCurrentThread());
558		assertNull(ForkJoinTask.getPool());
#	Line 650 | Line 628 | public class CompletableFutureTest exten
628
629		ASYNC {
630		public void checkExecutionMode() {
631	<	assertSame(ForkJoinPool.commonPool(),
632	<	ForkJoinTask.getPool());
631	>	assertEquals(defaultExecutorIsCommonPool,
632	>	(ForkJoinPool.commonPool() == ForkJoinTask.getPool()));
633		}
634		public CompletableFuture<Void> runAsync(Runnable a) {
635		return CompletableFuture.runAsync(a);
#	Line 875 | Line 853 | public class CompletableFutureTest exten
853		if (!createIncomplete) f.completeExceptionally(ex);
854		final CompletableFuture<Integer> g = f.exceptionally
855		((Throwable t) -> {
856	<	ExecutionMode.DEFAULT.checkExecutionMode();
856	>	ExecutionMode.SYNC.checkExecutionMode();
857		threadAssertSame(t, ex);
858		a.getAndIncrement();
859		return v1;
#	Line 888 | Line 866 | public class CompletableFutureTest exten
866
867		public void testExceptionally_exceptionalCompletionActionFailed() {
868		for (boolean createIncomplete : new boolean[] { true, false })
891	–	for (Integer v1 : new Integer[] { 1, null })
869		{
870		final AtomicInteger a = new AtomicInteger(0);
871		final CFException ex1 = new CFException();
#	Line 897 | Line 874 | public class CompletableFutureTest exten
874		if (!createIncomplete) f.completeExceptionally(ex1);
875		final CompletableFuture<Integer> g = f.exceptionally
876		((Throwable t) -> {
877	<	ExecutionMode.DEFAULT.checkExecutionMode();
877	>	ExecutionMode.SYNC.checkExecutionMode();
878		threadAssertSame(t, ex1);
879		a.getAndIncrement();
880		throw ex2;
#	Line 942 | Line 919 | public class CompletableFutureTest exten
919		public void testWhenComplete_exceptionalCompletion() {
920		for (ExecutionMode m : ExecutionMode.values())
921		for (boolean createIncomplete : new boolean[] { true, false })
945	–	for (Integer v1 : new Integer[] { 1, null })
922		{
923		final AtomicInteger a = new AtomicInteger(0);
924		final CFException ex = new CFException();
#	Line 1027 | Line 1003 | public class CompletableFutureTest exten
1003		public void testWhenComplete_actionFailedSourceFailed() {
1004		for (boolean createIncomplete : new boolean[] { true, false })
1005		for (ExecutionMode m : ExecutionMode.values())
1030	–	for (Integer v1 : new Integer[] { 1, null })
1006		{
1007		final AtomicInteger a = new AtomicInteger(0);
1008		final CFException ex1 = new CFException();
#	Line 1628 | Line 1603 | public class CompletableFutureTest exten
1603		rs[0].assertValue(subtract(v1, v2));
1604		rs[2].assertValue(subtract(v1, v2));
1605		rs[4].assertValue(subtract(v1, v2));
1606	<
1606	>
1607		checkCompletedNormally(f, v1);
1608		checkCompletedNormally(g, v2);
1609		}}
#	Line 2975 | Line 2950 | public class CompletableFutureTest exten
2950		checkCancelled(f);
2951		}}
2952
2953	+	/**
2954	+	* thenCompose result completes exceptionally if the result of the action does
2955	+	*/
2956	+	public void testThenCompose_actionReturnsFailingFuture() {
2957	+	for (ExecutionMode m : ExecutionMode.values())
2958	+	for (int order = 0; order < 6; order++)
2959	+	for (Integer v1 : new Integer[] { 1, null })
2960	+	{
2961	+	final CFException ex = new CFException();
2962	+	final CompletableFuture<Integer> f = new CompletableFuture<>();
2963	+	final CompletableFuture<Integer> g = new CompletableFuture<>();
2964	+	final CompletableFuture<Integer> h;
2965	+	// Test all permutations of orders
2966	+	switch (order) {
2967	+	case 0:
2968	+	assertTrue(f.complete(v1));
2969	+	assertTrue(g.completeExceptionally(ex));
2970	+	h = m.thenCompose(f, (x -> g));
2971	+	break;
2972	+	case 1:
2973	+	assertTrue(f.complete(v1));
2974	+	h = m.thenCompose(f, (x -> g));
2975	+	assertTrue(g.completeExceptionally(ex));
2976	+	break;
2977	+	case 2:
2978	+	assertTrue(g.completeExceptionally(ex));
2979	+	assertTrue(f.complete(v1));
2980	+	h = m.thenCompose(f, (x -> g));
2981	+	break;
2982	+	case 3:
2983	+	assertTrue(g.completeExceptionally(ex));
2984	+	h = m.thenCompose(f, (x -> g));
2985	+	assertTrue(f.complete(v1));
2986	+	break;
2987	+	case 4:
2988	+	h = m.thenCompose(f, (x -> g));
2989	+	assertTrue(f.complete(v1));
2990	+	assertTrue(g.completeExceptionally(ex));
2991	+	break;
2992	+	case 5:
2993	+	h = m.thenCompose(f, (x -> g));
2994	+	assertTrue(f.complete(v1));
2995	+	assertTrue(g.completeExceptionally(ex));
2996	+	break;
2997	+	default: throw new AssertionError();
2998	+	}
2999	+
3000	+	checkCompletedExceptionally(g, ex);
3001	+	checkCompletedWithWrappedException(h, ex);
3002	+	checkCompletedNormally(f, v1);
3003	+	}}
3004	+
3005		// other static methods
3006
3007		/**
#	Line 3035 | Line 3062 | public class CompletableFutureTest exten
3062		for (int i = 0; i < k; i++) {
3063		checkIncomplete(f);
3064		checkIncomplete(CompletableFuture.allOf(fs));
3065	<	if (i != k/2) {
3065	>	if (i != k / 2) {
3066		fs[i].complete(i);
3067		checkCompletedNormally(fs[i], i);
3068		} else {
#	Line 3142 | Line 3169 | public class CompletableFutureTest exten
3169		CompletableFuture<Integer> f = new CompletableFuture<>();
3170		CompletableFuture<Integer> g = new CompletableFuture<>();
3171		CompletableFuture<Integer> nullFuture = (CompletableFuture<Integer>)null;
3145	–	CompletableFuture<?> h;
3172		ThreadExecutor exec = new ThreadExecutor();
3173
3174		Runnable[] throwingActions = {
3175		() -> CompletableFuture.supplyAsync(null),
3176		() -> CompletableFuture.supplyAsync(null, exec),
3177	<	() -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.DEFAULT, 42), null),
3177	>	() -> CompletableFuture.supplyAsync(new IntegerSupplier(ExecutionMode.SYNC, 42), null),
3178
3179		() -> CompletableFuture.runAsync(null),
3180		() -> CompletableFuture.runAsync(null, exec),
#	Line 3239 | Line 3265 | public class CompletableFutureTest exten
3265		() -> CompletableFuture.anyOf(null, f),
3266
3267		() -> f.obtrudeException(null),
3268	+
3269	+	() -> CompletableFuture.delayedExecutor(1L, SECONDS, null),
3270	+	() -> CompletableFuture.delayedExecutor(1L, null, new ThreadExecutor()),
3271	+	() -> CompletableFuture.delayedExecutor(1L, null),
3272	+
3273	+	() -> f.orTimeout(1L, null),
3274	+	() -> f.completeOnTimeout(42, 1L, null),
3275	+
3276	+	() -> CompletableFuture.failedFuture(null),
3277	+	() -> CompletableFuture.failedStage(null),
3278		};
3279
3280		assertThrows(NullPointerException.class, throwingActions);
#	Line 3253 | Line 3289 | public class CompletableFutureTest exten
3289		assertSame(f, f.toCompletableFuture());
3290		}
3291
3292	+	// jdk9
3293	+
3294	+	/**
3295	+	* newIncompleteFuture returns an incomplete CompletableFuture
3296	+	*/
3297	+	public void testNewIncompleteFuture() {
3298	+	for (Integer v1 : new Integer[] { 1, null })
3299	+	{
3300	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3301	+	CompletableFuture<Integer> g = f.newIncompleteFuture();
3302	+	checkIncomplete(f);
3303	+	checkIncomplete(g);
3304	+	f.complete(v1);
3305	+	checkCompletedNormally(f, v1);
3306	+	checkIncomplete(g);
3307	+	g.complete(v1);
3308	+	checkCompletedNormally(g, v1);
3309	+	assertSame(g.getClass(), CompletableFuture.class);
3310	+	}}
3311	+
3312	+	/**
3313	+	* completedStage returns a completed CompletionStage
3314	+	*/
3315	+	public void testCompletedStage() {
3316	+	AtomicInteger x = new AtomicInteger(0);
3317	+	AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3318	+	CompletionStage<Integer> f = CompletableFuture.completedStage(1);
3319	+	f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3320	+	assertEquals(x.get(), 1);
3321	+	assertNull(r.get());
3322	+	}
3323	+
3324	+	/**
3325	+	* defaultExecutor by default returns the commonPool if
3326	+	* it supports more than one thread.
3327	+	*/
3328	+	public void testDefaultExecutor() {
3329	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3330	+	Executor e = f.defaultExecutor();
3331	+	Executor c = ForkJoinPool.commonPool();
3332	+	if (ForkJoinPool.getCommonPoolParallelism() > 1)
3333	+	assertSame(e, c);
3334	+	else
3335	+	assertNotSame(e, c);
3336	+	}
3337	+
3338	+	/**
3339	+	* failedFuture returns a CompletableFuture completed
3340	+	* exceptionally with the given Exception
3341	+	*/
3342	+	public void testFailedFuture() {
3343	+	CFException ex = new CFException();
3344	+	CompletableFuture<Integer> f = CompletableFuture.failedFuture(ex);
3345	+	checkCompletedExceptionally(f, ex);
3346	+	}
3347	+
3348	+	/**
3349	+	* failedFuture(null) throws NPE
3350	+	*/
3351	+	public void testFailedFuture_null() {
3352	+	try {
3353	+	CompletableFuture<Integer> f = CompletableFuture.failedFuture(null);
3354	+	shouldThrow();
3355	+	} catch (NullPointerException success) {}
3356	+	}
3357	+
3358	+	/**
3359	+	* copy returns a CompletableFuture that is completed normally,
3360	+	* with the same value, when source is.
3361	+	*/
3362	+	public void testCopy() {
3363	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3364	+	CompletableFuture<Integer> g = f.copy();
3365	+	checkIncomplete(f);
3366	+	checkIncomplete(g);
3367	+	f.complete(1);
3368	+	checkCompletedNormally(f, 1);
3369	+	checkCompletedNormally(g, 1);
3370	+	}
3371	+
3372	+	/**
3373	+	* copy returns a CompletableFuture that is completed exceptionally
3374	+	* when source is.
3375	+	*/
3376	+	public void testCopy2() {
3377	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3378	+	CompletableFuture<Integer> g = f.copy();
3379	+	checkIncomplete(f);
3380	+	checkIncomplete(g);
3381	+	CFException ex = new CFException();
3382	+	f.completeExceptionally(ex);
3383	+	checkCompletedExceptionally(f, ex);
3384	+	checkCompletedWithWrappedException(g, ex);
3385	+	}
3386	+
3387	+	/**
3388	+	* minimalCompletionStage returns a CompletableFuture that is
3389	+	* completed normally, with the same value, when source is.
3390	+	*/
3391	+	public void testMinimalCompletionStage() {
3392	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3393	+	CompletionStage<Integer> g = f.minimalCompletionStage();
3394	+	AtomicInteger x = new AtomicInteger(0);
3395	+	AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3396	+	checkIncomplete(f);
3397	+	g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3398	+	f.complete(1);
3399	+	checkCompletedNormally(f, 1);
3400	+	assertEquals(x.get(), 1);
3401	+	assertNull(r.get());
3402	+	}
3403	+
3404	+	/**
3405	+	* minimalCompletionStage returns a CompletableFuture that is
3406	+	* completed exceptionally when source is.
3407	+	*/
3408	+	public void testMinimalCompletionStage2() {
3409	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3410	+	CompletionStage<Integer> g = f.minimalCompletionStage();
3411	+	AtomicInteger x = new AtomicInteger(0);
3412	+	AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3413	+	g.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3414	+	checkIncomplete(f);
3415	+	CFException ex = new CFException();
3416	+	f.completeExceptionally(ex);
3417	+	checkCompletedExceptionally(f, ex);
3418	+	assertEquals(x.get(), 0);
3419	+	assertEquals(r.get().getCause(), ex);
3420	+	}
3421	+
3422	+	/**
3423	+	* failedStage returns a CompletionStage completed
3424	+	* exceptionally with the given Exception
3425	+	*/
3426	+	public void testFailedStage() {
3427	+	CFException ex = new CFException();
3428	+	CompletionStage<Integer> f = CompletableFuture.failedStage(ex);
3429	+	AtomicInteger x = new AtomicInteger(0);
3430	+	AtomicReference<Throwable> r = new AtomicReference<Throwable>();
3431	+	f.whenComplete((v, e) -> {if (e != null) r.set(e); else x.set(v);});
3432	+	assertEquals(x.get(), 0);
3433	+	assertEquals(r.get(), ex);
3434	+	}
3435	+
3436	+	/**
3437	+	* completeAsync completes with value of given supplier
3438	+	*/
3439	+	public void testCompleteAsync() {
3440	+	for (Integer v1 : new Integer[] { 1, null })
3441	+	{
3442	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3443	+	f.completeAsync(() -> v1);
3444	+	f.join();
3445	+	checkCompletedNormally(f, v1);
3446	+	}}
3447	+
3448	+	/**
3449	+	* completeAsync completes exceptionally if given supplier throws
3450	+	*/
3451	+	public void testCompleteAsync2() {
3452	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3453	+	CFException ex = new CFException();
3454	+	f.completeAsync(() -> {if (true) throw ex; return 1;});
3455	+	try {
3456	+	f.join();
3457	+	shouldThrow();
3458	+	} catch (CompletionException success) {}
3459	+	checkCompletedWithWrappedException(f, ex);
3460	+	}
3461	+
3462	+	/**
3463	+	* completeAsync with given executor completes with value of given supplier
3464	+	*/
3465	+	public void testCompleteAsync3() {
3466	+	for (Integer v1 : new Integer[] { 1, null })
3467	+	{
3468	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3469	+	ThreadExecutor executor = new ThreadExecutor();
3470	+	f.completeAsync(() -> v1, executor);
3471	+	assertSame(v1, f.join());
3472	+	checkCompletedNormally(f, v1);
3473	+	assertEquals(1, executor.count.get());
3474	+	}}
3475	+
3476	+	/**
3477	+	* completeAsync with given executor completes exceptionally if
3478	+	* given supplier throws
3479	+	*/
3480	+	public void testCompleteAsync4() {
3481	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3482	+	CFException ex = new CFException();
3483	+	ThreadExecutor executor = new ThreadExecutor();
3484	+	f.completeAsync(() -> {if (true) throw ex; return 1;}, executor);
3485	+	try {
3486	+	f.join();
3487	+	shouldThrow();
3488	+	} catch (CompletionException success) {}
3489	+	checkCompletedWithWrappedException(f, ex);
3490	+	assertEquals(1, executor.count.get());
3491	+	}
3492	+
3493	+	/**
3494	+	* orTimeout completes with TimeoutException if not complete
3495	+	*/
3496	+	public void testOrTimeout_timesOut() {
3497	+	long timeoutMillis = timeoutMillis();
3498	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3499	+	long startTime = System.nanoTime();
3500	+	f.orTimeout(timeoutMillis, MILLISECONDS);
3501	+	checkCompletedWithTimeoutException(f);
3502	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3503	+	}
3504	+
3505	+	/**
3506	+	* orTimeout completes normally if completed before timeout
3507	+	*/
3508	+	public void testOrTimeout_completed() {
3509	+	for (Integer v1 : new Integer[] { 1, null })
3510	+	{
3511	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3512	+	CompletableFuture<Integer> g = new CompletableFuture<>();
3513	+	long startTime = System.nanoTime();
3514	+	f.complete(v1);
3515	+	f.orTimeout(LONG_DELAY_MS, MILLISECONDS);
3516	+	g.orTimeout(LONG_DELAY_MS, MILLISECONDS);
3517	+	g.complete(v1);
3518	+	checkCompletedNormally(f, v1);
3519	+	checkCompletedNormally(g, v1);
3520	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3521	+	}}
3522	+
3523	+	/**
3524	+	* completeOnTimeout completes with given value if not complete
3525	+	*/
3526	+	public void testCompleteOnTimeout_timesOut() {
3527	+	testInParallel(() -> testCompleteOnTimeout_timesOut(42),
3528	+	() -> testCompleteOnTimeout_timesOut(null));
3529	+	}
3530	+
3531	+	public void testCompleteOnTimeout_timesOut(Integer v) {
3532	+	long timeoutMillis = timeoutMillis();
3533	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3534	+	long startTime = System.nanoTime();
3535	+	f.completeOnTimeout(v, timeoutMillis, MILLISECONDS);
3536	+	assertSame(v, f.join());
3537	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
3538	+	f.complete(99);         // should have no effect
3539	+	checkCompletedNormally(f, v);
3540	+	}
3541	+
3542	+	/**
3543	+	* completeOnTimeout has no effect if completed within timeout
3544	+	*/
3545	+	public void testCompleteOnTimeout_completed() {
3546	+	for (Integer v1 : new Integer[] { 1, null })
3547	+	{
3548	+	CompletableFuture<Integer> f = new CompletableFuture<>();
3549	+	CompletableFuture<Integer> g = new CompletableFuture<>();
3550	+	long startTime = System.nanoTime();
3551	+	f.complete(v1);
3552	+	f.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS);
3553	+	g.completeOnTimeout(-1, LONG_DELAY_MS, MILLISECONDS);
3554	+	g.complete(v1);
3555	+	checkCompletedNormally(f, v1);
3556	+	checkCompletedNormally(g, v1);
3557	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2);
3558	+	}}
3559	+
3560	+	/**
3561	+	* delayedExecutor returns an executor that delays submission
3562	+	*/
3563	+	public void testDelayedExecutor() {
3564	+	testInParallel(() -> testDelayedExecutor(null, null),
3565	+	() -> testDelayedExecutor(null, 1),
3566	+	() -> testDelayedExecutor(new ThreadExecutor(), 1),
3567	+	() -> testDelayedExecutor(new ThreadExecutor(), 1));
3568	+	}
3569	+
3570	+	/**
3571	+	* delayedExecutor returns an executor that delays submission
3572	+	*/
3573	+	public void testDelayedExecutor(Executor executor, Integer v) throws Exception {
3574	+	long timeoutMillis = timeoutMillis();
3575	+	// Use an "unreasonably long" long timeout to catch lingering threads
3576	+	long longTimeoutMillis = 1000 * 60 * 60 * 24;
3577	+	final Executor delayer, longDelayer;
3578	+	if (executor == null) {
3579	+	delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS);
3580	+	longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS);
3581	+	} else {
3582	+	delayer = CompletableFuture.delayedExecutor(timeoutMillis, MILLISECONDS, executor);
3583	+	longDelayer = CompletableFuture.delayedExecutor(longTimeoutMillis, MILLISECONDS, executor);
3584	+	}
3585	+	long startTime = System.nanoTime();
3586	+	CompletableFuture<Integer> f =
3587	+	CompletableFuture.supplyAsync(() -> v, delayer);
3588	+	CompletableFuture<Integer> g =
3589	+	CompletableFuture.supplyAsync(() -> v, longDelayer);
3590	+
3591	+	assertNull(g.getNow(null));
3592	+
3593	+	assertSame(v, f.get(LONG_DELAY_MS, MILLISECONDS));
3594	+	long millisElapsed = millisElapsedSince(startTime);
3595	+	assertTrue(millisElapsed >= timeoutMillis);
3596	+	assertTrue(millisElapsed < LONG_DELAY_MS / 2);
3597	+
3598	+	checkCompletedNormally(f, v);
3599	+
3600	+	checkIncomplete(g);
3601	+	assertTrue(g.cancel(true));
3602	+	}
3603	+
3604		//--- tests of implementation details; not part of official tck ---
3605
3606		Object resultOf(CompletableFuture<?> f) {

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