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 1.128 by jsr166, Sun Nov 15 00:37:50 2015 UTC vs.
Revision 1.135 by jsr166, Sun Nov 15 20:03:08 2015 UTC

#	Line 911 | 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 938 | 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 965 | 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 982 | 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 993 | 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 1010 | 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 1024 | 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 1052 | 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 1081 | 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 1110 | 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 1125 | 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();
1138	<	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		{
1160	–	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 3644 | 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 3764 | Line 3771 | public class CompletableFutureTest exten
3771		}
3772
3773		static class Monad {
3774	<	static class MonadError extends Error {
3775	<	public MonadError() { super("monadic zero"); }
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(T value) {
3783	<	return failedFuture(new MonadError());
3782	>	static <T> CompletableFuture<T> zero() {
3783	>	return failedFuture(new ZeroException());
3784		}
3785		// >=>
3786		static <T,U,V> Function<T, CompletableFuture<V>> compose
#	Line 3787 | Line 3794 | public class CompletableFutureTest exten
3794		f.getNow(null);
3795		throw new AssertionFailedError("should throw");
3796		} catch (CompletionException success) {
3797	<	assertTrue(success.getCause() instanceof MonadError);
3797	>	assertTrue(success.getCause() instanceof ZeroException);
3798		}
3799		}
3800
#	Line 3818 | Line 3825 | public class CompletableFutureTest exten
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 fail) -> {
3829	<	if (result != null) {
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, fail)) {
3834	>	else if (plus.firstFailure.compareAndSet(null, ex)) {
3835		if (plus.isDone())
3836		plus.firstFailure.set(null);
3837	<	} else {
3838	<	if (plus.completeExceptionally(fail))
3839	<	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);
#	Line 3843 | Line 3857 | public class CompletableFutureTest exten
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) -> completedFuture(3 * x);
3865	>	= (x) -> Monad.unit(3 * x);
3866		Function<Long, CompletableFuture<Long>> inc
3867	<	= (x) -> completedFuture(x + 1);
3851	<
3852	<	Function<Long, CompletableFuture<Long>> unit = Monad::unit;
3853	<	Function<Long, CompletableFuture<Long>> zero = Monad::zero;
3867	>	= (x) -> Monad.unit(x + 1);
3868
3869		// unit is a right identity: m >>= unit === m
3870	<	Monad.assertFutureEquals(
3871	<	inc.apply(5L).thenCompose(unit),
3858	<	inc.apply(5L));
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(
3874	<	unit.apply(5L).thenCompose(inc),
3875	<	inc.apply(5L));
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.apply(5L));
3870	<	// left zero: zero >>= f === zero
3871	<	Monad.assertZero(zero.apply(5L).thenCompose(inc));
3872	<	// right zero: f >>= zero === zero
3873	<	Monad.assertZero(inc.apply(5L).thenCompose(zero));
3884	>	Monad.assertZero(zero);
3885
3886	<	// inc plus zero === inc
3887	<	Monad.assertFutureEquals(
3888	<	inc.apply(5L),
3889	<	Monad.plus(inc.apply(5L), zero.apply(5L)));
3890	<	// zero plus inc === inc
3891	<	Monad.assertFutureEquals(
3892	<	inc.apply(5L),
3893	<	Monad.plus(zero.apply(5L), inc.apply(5L)));
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.apply(5L), zero.apply(5L)));
3898	>	Monad.assertZero(Monad.plus(zero, zero));
3899		{
3900	<	CompletableFuture<Long> f = Monad.plus(inc.apply(5L), inc.apply(8L));
3901	<	assertTrue(f.get() == 6L || f.get() == 9L);
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	<	// inc plus godot === inc (doesn't wait for godot)
3908	<	Monad.assertFutureEquals(
3909	<	inc.apply(5L),
3910	<	Monad.plus(inc.apply(5L), godot));
3911	<	// godot plus inc === inc (doesn't wait for godot)
3912	<	Monad.assertFutureEquals(
3897	<	inc.apply(5L),
3898	<	Monad.plus(godot, inc.apply(5L)));
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) {

Diff Legend

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