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root/jsr166/jsr166/src/test/tck/JSR166TestCase.java

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.57 by jsr166, Mon Oct 4 05:45:19 2010 UTC vs.
Revision 1.79 by jsr166, Mon May 9 20:00:19 2011 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	+	import java.io.ByteArrayInputStream;
11	+	import java.io.ByteArrayOutputStream;
12	+	import java.io.ObjectInputStream;
13	+	import java.io.ObjectOutputStream;
14	+	import java.util.Arrays;
15	+	import java.util.NoSuchElementException;
16		import java.util.PropertyPermission;
17		import java.util.concurrent.*;
18		import java.util.concurrent.atomic.AtomicReference;
19		import static java.util.concurrent.TimeUnit.MILLISECONDS;
20	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
21		import java.security.CodeSource;
22		import java.security.Permission;
23		import java.security.PermissionCollection;
#	Line 96 | Line 103 | public class JSR166TestCase extends Test
103		private static final boolean useSecurityManager =
104		Boolean.getBoolean("jsr166.useSecurityManager");
105
106	+	protected static final boolean expensiveTests =
107	+	Boolean.getBoolean("jsr166.expensiveTests");
108	+
109	+	/**
110	+	* If true, report on stdout all "slow" tests, that is, ones that
111	+	* take more than profileThreshold milliseconds to execute.
112	+	*/
113	+	private static final boolean profileTests =
114	+	Boolean.getBoolean("jsr166.profileTests");
115	+
116	+	/**
117	+	* The number of milliseconds that tests are permitted for
118	+	* execution without being reported, when profileTests is set.
119	+	*/
120	+	private static final long profileThreshold =
121	+	Long.getLong("jsr166.profileThreshold", 100);
122	+
123	+	protected void runTest() throws Throwable {
124	+	if (profileTests)
125	+	runTestProfiled();
126	+	else
127	+	super.runTest();
128	+	}
129	+
130	+	protected void runTestProfiled() throws Throwable {
131	+	long t0 = System.nanoTime();
132	+	try {
133	+	super.runTest();
134	+	} finally {
135	+	long elapsedMillis =
136	+	(System.nanoTime() - t0) / (1000L * 1000L);
137	+	if (elapsedMillis >= profileThreshold)
138	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
139	+	}
140	+	}
141	+
142		/**
143		* Runs all JSR166 unit tests using junit.textui.TestRunner
144		*/
#	Line 116 | Line 159 | public class JSR166TestCase extends Test
159		System.exit(0);
160		}
161
162	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
163	+	TestSuite suite = new TestSuite();
164	+	for (Object suiteOrClass : suiteOrClasses) {
165	+	if (suiteOrClass instanceof TestSuite)
166	+	suite.addTest((TestSuite) suiteOrClass);
167	+	else if (suiteOrClass instanceof Class)
168	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
169	+	else
170	+	throw new ClassCastException("not a test suite or class");
171	+	}
172	+	return suite;
173	+	}
174	+
175		/**
176	<	* Collects all JSR166 unit tests as one suite
176	>	* Collects all JSR166 unit tests as one suite.
177		*/
178		public static Test suite() {
179	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
180	<
181	<	suite.addTest(ForkJoinPoolTest.suite());
182	<	suite.addTest(ForkJoinTaskTest.suite());
183	<	suite.addTest(RecursiveActionTest.suite());
184	<	suite.addTest(RecursiveTaskTest.suite());
185	<	suite.addTest(LinkedTransferQueueTest.suite());
186	<	suite.addTest(PhaserTest.suite());
187	<	suite.addTest(ThreadLocalRandomTest.suite());
188	<	suite.addTest(AbstractExecutorServiceTest.suite());
189	<	suite.addTest(AbstractQueueTest.suite());
190	<	suite.addTest(AbstractQueuedSynchronizerTest.suite());
191	<	suite.addTest(AbstractQueuedLongSynchronizerTest.suite());
192	<	suite.addTest(ArrayBlockingQueueTest.suite());
193	<	suite.addTest(ArrayDequeTest.suite());
194	<	suite.addTest(AtomicBooleanTest.suite());
195	<	suite.addTest(AtomicIntegerArrayTest.suite());
196	<	suite.addTest(AtomicIntegerFieldUpdaterTest.suite());
197	<	suite.addTest(AtomicIntegerTest.suite());
198	<	suite.addTest(AtomicLongArrayTest.suite());
199	<	suite.addTest(AtomicLongFieldUpdaterTest.suite());
200	<	suite.addTest(AtomicLongTest.suite());
201	<	suite.addTest(AtomicMarkableReferenceTest.suite());
202	<	suite.addTest(AtomicReferenceArrayTest.suite());
203	<	suite.addTest(AtomicReferenceFieldUpdaterTest.suite());
204	<	suite.addTest(AtomicReferenceTest.suite());
205	<	suite.addTest(AtomicStampedReferenceTest.suite());
206	<	suite.addTest(ConcurrentHashMapTest.suite());
207	<	suite.addTest(ConcurrentLinkedDequeTest.suite());
208	<	suite.addTest(ConcurrentLinkedQueueTest.suite());
209	<	suite.addTest(ConcurrentSkipListMapTest.suite());
210	<	suite.addTest(ConcurrentSkipListSubMapTest.suite());
211	<	suite.addTest(ConcurrentSkipListSetTest.suite());
212	<	suite.addTest(ConcurrentSkipListSubSetTest.suite());
213	<	suite.addTest(CopyOnWriteArrayListTest.suite());
214	<	suite.addTest(CopyOnWriteArraySetTest.suite());
215	<	suite.addTest(CountDownLatchTest.suite());
216	<	suite.addTest(CyclicBarrierTest.suite());
217	<	suite.addTest(DelayQueueTest.suite());
218	<	suite.addTest(EntryTest.suite());
219	<	suite.addTest(ExchangerTest.suite());
220	<	suite.addTest(ExecutorsTest.suite());
221	<	suite.addTest(ExecutorCompletionServiceTest.suite());
222	<	suite.addTest(FutureTaskTest.suite());
223	<	suite.addTest(LinkedBlockingDequeTest.suite());
224	<	suite.addTest(LinkedBlockingQueueTest.suite());
225	<	suite.addTest(LinkedListTest.suite());
226	<	suite.addTest(LockSupportTest.suite());
227	<	suite.addTest(PriorityBlockingQueueTest.suite());
228	<	suite.addTest(PriorityQueueTest.suite());
229	<	suite.addTest(ReentrantLockTest.suite());
230	<	suite.addTest(ReentrantReadWriteLockTest.suite());
231	<	suite.addTest(ScheduledExecutorTest.suite());
232	<	suite.addTest(ScheduledExecutorSubclassTest.suite());
233	<	suite.addTest(SemaphoreTest.suite());
234	<	suite.addTest(SynchronousQueueTest.suite());
235	<	suite.addTest(SystemTest.suite());
236	<	suite.addTest(ThreadLocalTest.suite());
237	<	suite.addTest(ThreadPoolExecutorTest.suite());
238	<	suite.addTest(ThreadPoolExecutorSubclassTest.suite());
239	<	suite.addTest(ThreadTest.suite());
240	<	suite.addTest(TimeUnitTest.suite());
241	<	suite.addTest(TreeMapTest.suite());
242	<	suite.addTest(TreeSetTest.suite());
243	<	suite.addTest(TreeSubMapTest.suite());
188	<	suite.addTest(TreeSubSetTest.suite());
189	<
190	<	return suite;
179	>	return newTestSuite(
180	>	ForkJoinPoolTest.suite(),
181	>	ForkJoinTaskTest.suite(),
182	>	RecursiveActionTest.suite(),
183	>	RecursiveTaskTest.suite(),
184	>	LinkedTransferQueueTest.suite(),
185	>	PhaserTest.suite(),
186	>	ThreadLocalRandomTest.suite(),
187	>	AbstractExecutorServiceTest.suite(),
188	>	AbstractQueueTest.suite(),
189	>	AbstractQueuedSynchronizerTest.suite(),
190	>	AbstractQueuedLongSynchronizerTest.suite(),
191	>	ArrayBlockingQueueTest.suite(),
192	>	ArrayDequeTest.suite(),
193	>	AtomicBooleanTest.suite(),
194	>	AtomicIntegerArrayTest.suite(),
195	>	AtomicIntegerFieldUpdaterTest.suite(),
196	>	AtomicIntegerTest.suite(),
197	>	AtomicLongArrayTest.suite(),
198	>	AtomicLongFieldUpdaterTest.suite(),
199	>	AtomicLongTest.suite(),
200	>	AtomicMarkableReferenceTest.suite(),
201	>	AtomicReferenceArrayTest.suite(),
202	>	AtomicReferenceFieldUpdaterTest.suite(),
203	>	AtomicReferenceTest.suite(),
204	>	AtomicStampedReferenceTest.suite(),
205	>	ConcurrentHashMapTest.suite(),
206	>	ConcurrentLinkedDequeTest.suite(),
207	>	ConcurrentLinkedQueueTest.suite(),
208	>	ConcurrentSkipListMapTest.suite(),
209	>	ConcurrentSkipListSubMapTest.suite(),
210	>	ConcurrentSkipListSetTest.suite(),
211	>	ConcurrentSkipListSubSetTest.suite(),
212	>	CopyOnWriteArrayListTest.suite(),
213	>	CopyOnWriteArraySetTest.suite(),
214	>	CountDownLatchTest.suite(),
215	>	CyclicBarrierTest.suite(),
216	>	DelayQueueTest.suite(),
217	>	EntryTest.suite(),
218	>	ExchangerTest.suite(),
219	>	ExecutorsTest.suite(),
220	>	ExecutorCompletionServiceTest.suite(),
221	>	FutureTaskTest.suite(),
222	>	LinkedBlockingDequeTest.suite(),
223	>	LinkedBlockingQueueTest.suite(),
224	>	LinkedListTest.suite(),
225	>	LockSupportTest.suite(),
226	>	PriorityBlockingQueueTest.suite(),
227	>	PriorityQueueTest.suite(),
228	>	ReentrantLockTest.suite(),
229	>	ReentrantReadWriteLockTest.suite(),
230	>	ScheduledExecutorTest.suite(),
231	>	ScheduledExecutorSubclassTest.suite(),
232	>	SemaphoreTest.suite(),
233	>	SynchronousQueueTest.suite(),
234	>	SystemTest.suite(),
235	>	ThreadLocalTest.suite(),
236	>	ThreadPoolExecutorTest.suite(),
237	>	ThreadPoolExecutorSubclassTest.suite(),
238	>	ThreadTest.suite(),
239	>	TimeUnitTest.suite(),
240	>	TreeMapTest.suite(),
241	>	TreeSetTest.suite(),
242	>	TreeSubMapTest.suite(),
243	>	TreeSubSetTest.suite());
244		}
245
246
#	Line 213 | Line 266 | public class JSR166TestCase extends Test
266		SHORT_DELAY_MS = getShortDelay();
267		SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
268		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
269	<	LONG_DELAY_MS   = SHORT_DELAY_MS * 50;
269	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
270		}
271
272		/**
#	Line 242 | Line 295 | public class JSR166TestCase extends Test
295		* earlier by threadRecordFailure.
296		*/
297		public void tearDown() throws Exception {
298	<	Throwable t = threadFailure.get();
298	>	Throwable t = threadFailure.getAndSet(null);
299		if (t != null) {
300		if (t instanceof Error)
301		throw (Error) t;
#	Line 394 | Line 447 | public class JSR166TestCase extends Test
447		}
448
449		/**
450	+	* Delays, via Thread.sleep for the given millisecond delay, but
451	+	* if the sleep is shorter than specified, may re-sleep or yield
452	+	* until time elapses.
453	+	*/
454	+	public static void delay(long ms) throws InterruptedException {
455	+	long startTime = System.nanoTime();
456	+	long ns = ms * 1000 * 1000;
457	+	for (;;) {
458	+	if (ms > 0L)
459	+	Thread.sleep(ms);
460	+	else // too short to sleep
461	+	Thread.yield();
462	+	long d = ns - (System.nanoTime() - startTime);
463	+	if (d > 0L)
464	+	ms = d / (1000 * 1000);
465	+	else
466	+	break;
467	+	}
468	+	}
469	+
470	+	/**
471		* Waits out termination of a thread pool or fails doing so.
472		*/
473		public void joinPool(ExecutorService exec) {
474		try {
475		exec.shutdown();
476		assertTrue("ExecutorService did not terminate in a timely manner",
477	<	exec.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
477	>	exec.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS));
478		} catch (SecurityException ok) {
479		// Allowed in case test doesn't have privs
480		} catch (InterruptedException ie) {
#	Line 408 | Line 482 | public class JSR166TestCase extends Test
482		}
483		}
484
485	+	/**
486	+	* Checks that thread does not terminate within timeoutMillis
487	+	* milliseconds (that is, Thread.join times out).
488	+	*/
489	+	public void assertThreadJoinTimesOut(Thread thread, long timeoutMillis) {
490	+	try {
491	+	long startTime = System.nanoTime();
492	+	thread.join(timeoutMillis);
493	+	assertTrue(thread.isAlive());
494	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
495	+	} catch (InterruptedException ie) {
496	+	fail("Unexpected InterruptedException");
497	+	}
498	+	}
499
500		/**
501		* Fails with message "should throw exception".
#	Line 534 | Line 622 | public class JSR166TestCase extends Test
622		}
623
624		/**
625	<	* Sleep until the timeout has elapsed, or interrupted.
625	>	* Sleeps until the given time has elapsed.
626	>	* Throws AssertionFailedError if interrupted.
627	>	*/
628	>	void sleep(long millis) {
629	>	try {
630	>	delay(millis);
631	>	} catch (InterruptedException ie) {
632	>	AssertionFailedError afe =
633	>	new AssertionFailedError("Unexpected InterruptedException");
634	>	afe.initCause(ie);
635	>	throw afe;
636	>	}
637	>	}
638	>
639	>	/**
640	>	* Sleeps until the timeout has elapsed, or interrupted.
641		* Does <em>NOT</em> throw InterruptedException.
642		*/
643		void sleepTillInterrupted(long timeoutMillis) {
#	Line 544 | Line 647 | public class JSR166TestCase extends Test
647		}
648
649		/**
650	<	* Returns a new started Thread running the given runnable.
650	>	* Waits up to the specified number of milliseconds for the given
651	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
652	>	*/
653	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
654	>	long timeoutNanos = timeoutMillis * 1000L * 1000L;
655	>	long t0 = System.nanoTime();
656	>	for (;;) {
657	>	Thread.State s = thread.getState();
658	>	if (s == Thread.State.BLOCKED ||
659	>	s == Thread.State.WAITING ||
660	>	s == Thread.State.TIMED_WAITING)
661	>	return;
662	>	else if (s == Thread.State.TERMINATED)
663	>	fail("Unexpected thread termination");
664	>	else if (System.nanoTime() - t0 > timeoutNanos) {
665	>	threadAssertTrue(thread.isAlive());
666	>	return;
667	>	}
668	>	Thread.yield();
669	>	}
670	>	}
671	>
672	>	/**
673	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
674	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
675	>	*/
676	>	void waitForThreadToEnterWaitState(Thread thread) {
677	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
678	>	}
679	>
680	>	/**
681	>	* Returns the number of milliseconds since time given by
682	>	* startNanoTime, which must have been previously returned from a
683	>	* call to {@link System.nanoTime()}.
684	>	*/
685	>	long millisElapsedSince(long startNanoTime) {
686	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
687	>	}
688	>
689	>	/**
690	>	* Returns a new started daemon Thread running the given runnable.
691		*/
692		Thread newStartedThread(Runnable runnable) {
693		Thread t = new Thread(runnable);
694	+	t.setDaemon(true);
695		t.start();
696		return t;
697		}
698
699	+	/**
700	+	* Waits for the specified time (in milliseconds) for the thread
701	+	* to terminate (using {@link Thread#join(long)}), else interrupts
702	+	* the thread (in the hope that it may terminate later) and fails.
703	+	*/
704	+	void awaitTermination(Thread t, long timeoutMillis) {
705	+	try {
706	+	t.join(timeoutMillis);
707	+	} catch (InterruptedException ie) {
708	+	threadUnexpectedException(ie);
709	+	} finally {
710	+	if (t.isAlive()) {
711	+	t.interrupt();
712	+	fail("Test timed out");
713	+	}
714	+	}
715	+	}
716	+
717	+	/**
718	+	* Waits for LONG_DELAY_MS milliseconds for the thread to
719	+	* terminate (using {@link Thread#join(long)}), else interrupts
720	+	* the thread (in the hope that it may terminate later) and fails.
721	+	*/
722	+	void awaitTermination(Thread t) {
723	+	awaitTermination(t, LONG_DELAY_MS);
724	+	}
725	+
726		// Some convenient Runnable classes
727
728		public abstract class CheckedRunnable implements Runnable {
#	Line 666 | Line 837 | public class JSR166TestCase extends Test
837
838		public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
839		return new CheckedCallable<String>() {
840	<	public String realCall() {
840	>	protected String realCall() {
841		try {
842		latch.await();
843		} catch (InterruptedException quittingTime) {}
#	Line 674 | Line 845 | public class JSR166TestCase extends Test
845		}};
846		}
847
848	+	public Runnable awaiter(final CountDownLatch latch) {
849	+	return new CheckedRunnable() {
850	+	public void realRun() throws InterruptedException {
851	+	await(latch);
852	+	}};
853	+	}
854	+
855	+	public void await(CountDownLatch latch) {
856	+	try {
857	+	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
858	+	} catch (Throwable t) {
859	+	threadUnexpectedException(t);
860	+	}
861	+	}
862	+
863		public static class NPETask implements Callable<String> {
864		public String call() { throw new NullPointerException(); }
865		}
#	Line 684 | Line 870 | public class JSR166TestCase extends Test
870
871		public class ShortRunnable extends CheckedRunnable {
872		protected void realRun() throws Throwable {
873	<	Thread.sleep(SHORT_DELAY_MS);
873	>	delay(SHORT_DELAY_MS);
874		}
875		}
876
877		public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
878		protected void realRun() throws InterruptedException {
879	<	Thread.sleep(SHORT_DELAY_MS);
879	>	delay(SHORT_DELAY_MS);
880		}
881		}
882
883		public class SmallRunnable extends CheckedRunnable {
884		protected void realRun() throws Throwable {
885	<	Thread.sleep(SMALL_DELAY_MS);
885	>	delay(SMALL_DELAY_MS);
886		}
887		}
888
889		public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
890		protected void realRun() {
891		try {
892	<	Thread.sleep(SMALL_DELAY_MS);
892	>	delay(SMALL_DELAY_MS);
893		} catch (InterruptedException ok) {}
894		}
895		}
896
897		public class SmallCallable extends CheckedCallable {
898		protected Object realCall() throws InterruptedException {
899	<	Thread.sleep(SMALL_DELAY_MS);
899	>	delay(SMALL_DELAY_MS);
900		return Boolean.TRUE;
901		}
902		}
903
904		public class MediumRunnable extends CheckedRunnable {
905		protected void realRun() throws Throwable {
906	<	Thread.sleep(MEDIUM_DELAY_MS);
906	>	delay(MEDIUM_DELAY_MS);
907		}
908		}
909
910		public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
911		protected void realRun() throws InterruptedException {
912	<	Thread.sleep(MEDIUM_DELAY_MS);
912	>	delay(MEDIUM_DELAY_MS);
913		}
914		}
915
916	+	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
917	+	return new CheckedRunnable() {
918	+	protected void realRun() {
919	+	try {
920	+	delay(timeoutMillis);
921	+	} catch (InterruptedException ok) {}
922	+	}};
923	+	}
924	+
925		public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
926		protected void realRun() {
927		try {
928	<	Thread.sleep(MEDIUM_DELAY_MS);
928	>	delay(MEDIUM_DELAY_MS);
929		} catch (InterruptedException ok) {}
930		}
931		}
#	Line 738 | Line 933 | public class JSR166TestCase extends Test
933		public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
934		protected void realRun() {
935		try {
936	<	Thread.sleep(LONG_DELAY_MS);
936	>	delay(LONG_DELAY_MS);
937		} catch (InterruptedException ok) {}
938		}
939		}
#	Line 752 | Line 947 | public class JSR166TestCase extends Test
947		}
948		}
949
950	+	public interface TrackedRunnable extends Runnable {
951	+	boolean isDone();
952	+	}
953	+
954	+	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
955	+	return new TrackedRunnable() {
956	+	private volatile boolean done = false;
957	+	public boolean isDone() { return done; }
958	+	public void run() {
959	+	try {
960	+	delay(timeoutMillis);
961	+	done = true;
962	+	} catch (InterruptedException ok) {}
963	+	}
964	+	};
965	+	}
966	+
967		public static class TrackedShortRunnable implements Runnable {
968		public volatile boolean done = false;
969		public void run() {
970		try {
971	<	Thread.sleep(SMALL_DELAY_MS);
971	>	delay(SHORT_DELAY_MS);
972	>	done = true;
973	>	} catch (InterruptedException ok) {}
974	>	}
975	>	}
976	>
977	>	public static class TrackedSmallRunnable implements Runnable {
978	>	public volatile boolean done = false;
979	>	public void run() {
980	>	try {
981	>	delay(SMALL_DELAY_MS);
982		done = true;
983		} catch (InterruptedException ok) {}
984		}
#	Line 766 | Line 988 | public class JSR166TestCase extends Test
988		public volatile boolean done = false;
989		public void run() {
990		try {
991	<	Thread.sleep(MEDIUM_DELAY_MS);
991	>	delay(MEDIUM_DELAY_MS);
992		done = true;
993		} catch (InterruptedException ok) {}
994		}
#	Line 776 | Line 998 | public class JSR166TestCase extends Test
998		public volatile boolean done = false;
999		public void run() {
1000		try {
1001	<	Thread.sleep(LONG_DELAY_MS);
1001	>	delay(LONG_DELAY_MS);
1002		done = true;
1003		} catch (InterruptedException ok) {}
1004		}
#	Line 793 | Line 1015 | public class JSR166TestCase extends Test
1015		public volatile boolean done = false;
1016		public Object call() {
1017		try {
1018	<	Thread.sleep(SMALL_DELAY_MS);
1018	>	delay(SMALL_DELAY_MS);
1019		done = true;
1020		} catch (InterruptedException ok) {}
1021		return Boolean.TRUE;
#	Line 839 | Line 1061 | public class JSR166TestCase extends Test
1061		ThreadPoolExecutor executor) {}
1062		}
1063
1064	+	/**
1065	+	* A CyclicBarrier that fails with AssertionFailedErrors instead
1066	+	* of throwing checked exceptions.
1067	+	*/
1068	+	public class CheckedBarrier extends CyclicBarrier {
1069	+	public CheckedBarrier(int parties) { super(parties); }
1070	+
1071	+	public int await() {
1072	+	try {
1073	+	return super.await();
1074	+	} catch (Exception e) {
1075	+	AssertionFailedError afe =
1076	+	new AssertionFailedError("Unexpected exception: " + e);
1077	+	afe.initCause(e);
1078	+	throw afe;
1079	+	}
1080	+	}
1081	+	}
1082	+
1083	+	public void checkEmpty(BlockingQueue q) {
1084	+	try {
1085	+	assertTrue(q.isEmpty());
1086	+	assertEquals(0, q.size());
1087	+	assertNull(q.peek());
1088	+	assertNull(q.poll());
1089	+	assertNull(q.poll(0, MILLISECONDS));
1090	+	assertEquals(q.toString(), "[]");
1091	+	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1092	+	assertFalse(q.iterator().hasNext());
1093	+	try {
1094	+	q.element();
1095	+	shouldThrow();
1096	+	} catch (NoSuchElementException success) {}
1097	+	try {
1098	+	q.iterator().next();
1099	+	shouldThrow();
1100	+	} catch (NoSuchElementException success) {}
1101	+	try {
1102	+	q.remove();
1103	+	shouldThrow();
1104	+	} catch (NoSuchElementException success) {}
1105	+	} catch (InterruptedException ie) {
1106	+	threadUnexpectedException(ie);
1107	+	}
1108	+	}
1109	+
1110	+	@SuppressWarnings("unchecked")
1111	+	public <T> T serialClone(T o) {
1112	+	try {
1113	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1114	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1115	+	oos.writeObject(o);
1116	+	oos.flush();
1117	+	oos.close();
1118	+	ByteArrayInputStream bin =
1119	+	new ByteArrayInputStream(bos.toByteArray());
1120	+	ObjectInputStream ois = new ObjectInputStream(bin);
1121	+	return (T) ois.readObject();
1122	+	} catch (Throwable t) {
1123	+	threadUnexpectedException(t);
1124	+	return null;
1125	+	}
1126	+	}
1127		}

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