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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.150 by jsr166, Sat Oct 3 19:08:13 2015 UTC vs.
Revision 1.211 by jsr166, Mon Nov 14 23:52:22 2016 UTC

#	Line 6 | Line 6
6		* Pat Fisher, Mike Judd.
7		*/
8
9	+	/*
10	+	* @test
11	+	* @summary JSR-166 tck tests
12	+	* @modules java.management
13	+	* @build *
14	+	* @run junit/othervm/timeout=1000 -Djsr166.testImplementationDetails=true JSR166TestCase
15	+	* @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=0 -Djsr166.testImplementationDetails=true JSR166TestCase
16	+	* @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=1 -Djava.util.secureRandomSeed=true JSR166TestCase
17	+	*/
18	+
19		import static java.util.concurrent.TimeUnit.MILLISECONDS;
20	+	import static java.util.concurrent.TimeUnit.MINUTES;
21		import static java.util.concurrent.TimeUnit.NANOSECONDS;
22
23		import java.io.ByteArrayInputStream;
#	Line 19 | Line 30 | import java.lang.management.ThreadMXBean
30		import java.lang.reflect.Constructor;
31		import java.lang.reflect.Method;
32		import java.lang.reflect.Modifier;
33	+	import java.nio.file.Files;
34	+	import java.nio.file.Paths;
35		import java.security.CodeSource;
36		import java.security.Permission;
37		import java.security.PermissionCollection;
#	Line 28 | Line 41 | import java.security.ProtectionDomain;
41		import java.security.SecurityPermission;
42		import java.util.ArrayList;
43		import java.util.Arrays;
44	+	import java.util.Collection;
45	+	import java.util.Collections;
46		import java.util.Date;
47		import java.util.Enumeration;
48		import java.util.Iterator;
#	Line 47 | Line 62 | import java.util.concurrent.RecursiveAct
62		import java.util.concurrent.RecursiveTask;
63		import java.util.concurrent.RejectedExecutionHandler;
64		import java.util.concurrent.Semaphore;
65	+	import java.util.concurrent.SynchronousQueue;
66		import java.util.concurrent.ThreadFactory;
67	+	import java.util.concurrent.ThreadLocalRandom;
68		import java.util.concurrent.ThreadPoolExecutor;
69		import java.util.concurrent.TimeoutException;
70	+	import java.util.concurrent.atomic.AtomicBoolean;
71		import java.util.concurrent.atomic.AtomicReference;
72	+	import java.util.regex.Matcher;
73		import java.util.regex.Pattern;
74
75		import junit.framework.AssertionFailedError;
#	Line 108 | Line 127 | import junit.framework.TestSuite;
127		* methods as there are exceptions the method can throw. Sometimes
128		* there are multiple tests per JSR166 method when the different
129		* "normal" behaviors differ significantly. And sometimes testcases
130	<	* cover multiple methods when they cannot be tested in
112	<	* isolation.
130	>	* cover multiple methods when they cannot be tested in isolation.
131		*
132		* <li>The documentation style for testcases is to provide as javadoc
133		* a simple sentence or two describing the property that the testcase
#	Line 172 | Line 190 | public class JSR166TestCase extends Test
190		private static final int suiteRuns =
191		Integer.getInteger("jsr166.suiteRuns", 1);
192
193	+	/**
194	+	* Returns the value of the system property, or NaN if not defined.
195	+	*/
196	+	private static float systemPropertyValue(String name) {
197	+	String floatString = System.getProperty(name);
198	+	if (floatString == null)
199	+	return Float.NaN;
200	+	try {
201	+	return Float.parseFloat(floatString);
202	+	} catch (NumberFormatException ex) {
203	+	throw new IllegalArgumentException(
204	+	String.format("Bad float value in system property %s=%s",
205	+	name, floatString));
206	+	}
207	+	}
208	+
209	+	/**
210	+	* The scaling factor to apply to standard delays used in tests.
211	+	* May be initialized from any of:
212	+	* - the "jsr166.delay.factor" system property
213	+	* - the "test.timeout.factor" system property (as used by jtreg)
214	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
215	+	* - hard-coded fuzz factor when using a known slowpoke VM
216	+	*/
217	+	private static final float delayFactor = delayFactor();
218	+
219	+	private static float delayFactor() {
220	+	float x;
221	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
222	+	return x;
223	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
224	+	return x;
225	+	String prop = System.getProperty("java.vm.version");
226	+	if (prop != null && prop.matches(".*debug.*"))
227	+	return 4.0f; // How much slower is fastdebug than product?!
228	+	return 1.0f;
229	+	}
230	+
231		public JSR166TestCase() { super(); }
232		public JSR166TestCase(String name) { super(name); }
233
#	Line 187 | Line 243 | public class JSR166TestCase extends Test
243		return (regex == null) ? null : Pattern.compile(regex);
244		}
245
246	+	// Instrumentation to debug very rare, but very annoying hung test runs.
247	+	static volatile TestCase currentTestCase;
248	+	// static volatile int currentRun = 0;
249	+	static {
250	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
251	+	// Avoid spurious reports with enormous runsPerTest.
252	+	// A single test case run should never take more than 1 second.
253	+	// But let's cap it at the high end too ...
254	+	final int timeoutMinutes =
255	+	Math.min(15, Math.max(runsPerTest / 60, 1));
256	+	for (TestCase lastTestCase = currentTestCase;;) {
257	+	try { MINUTES.sleep(timeoutMinutes); }
258	+	catch (InterruptedException unexpected) { break; }
259	+	if (lastTestCase == currentTestCase) {
260	+	System.err.printf(
261	+	"Looks like we're stuck running test: %s%n",
262	+	lastTestCase);
263	+	//                     System.err.printf(
264	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
265	+	//                         lastTestCase, currentRun, runsPerTest);
266	+	//                     System.err.println("availableProcessors=" +
267	+	//                         Runtime.getRuntime().availableProcessors());
268	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
269	+	dumpTestThreads();
270	+	// one stack dump is probably enough; more would be spam
271	+	break;
272	+	}
273	+	lastTestCase = currentTestCase;
274	+	}}};
275	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
276	+	thread.setDaemon(true);
277	+	thread.start();
278	+	}
279	+
280	+	//     public static String cpuModel() {
281	+	//         try {
282	+	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
283	+	//                 .matcher(new String(
284	+	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
285	+	//             matcher.find();
286	+	//             return matcher.group(1);
287	+	//         } catch (Exception ex) { return null; }
288	+	//     }
289	+
290		public void runBare() throws Throwable {
291	+	currentTestCase = this;
292		if (methodFilter == null
293		|| methodFilter.matcher(toString()).find())
294		super.runBare();
#	Line 195 | Line 296 | public class JSR166TestCase extends Test
296
297		protected void runTest() throws Throwable {
298		for (int i = 0; i < runsPerTest; i++) {
299	+	// currentRun = i;
300		if (profileTests)
301		runTestProfiled();
302		else
#	Line 223 | Line 325 | public class JSR166TestCase extends Test
325		main(suite(), args);
326		}
327
328	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
329	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
330	+	long runTime;
331	+	public void startTest(Test test) {}
332	+	protected void printHeader(long runTime) {
333	+	this.runTime = runTime; // defer printing for later
334	+	}
335	+	protected void printFooter(TestResult result) {
336	+	if (result.wasSuccessful()) {
337	+	getWriter().println("OK (" + result.runCount() + " tests)"
338	+	+ "  Time: " + elapsedTimeAsString(runTime));
339	+	} else {
340	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
341	+	super.printFooter(result);
342	+	}
343	+	}
344	+	}
345	+
346	+	/**
347	+	* Returns a TestRunner that doesn't bother with unnecessary
348	+	* fluff, like printing a "." for each test case.
349	+	*/
350	+	static junit.textui.TestRunner newPithyTestRunner() {
351	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
352	+	runner.setPrinter(new PithyResultPrinter(System.out));
353	+	return runner;
354	+	}
355	+
356		/**
357		* Runs all unit tests in the given test suite.
358		* Actual behavior influenced by jsr166.* system properties.
#	Line 234 | Line 364 | public class JSR166TestCase extends Test
364		System.setSecurityManager(new SecurityManager());
365		}
366		for (int i = 0; i < suiteRuns; i++) {
367	<	TestResult result = junit.textui.TestRunner.run(suite);
367	>	TestResult result = newPithyTestRunner().doRun(suite);
368		if (!result.wasSuccessful())
369		System.exit(1);
370		System.gc();
#	Line 318 | Line 448 | public class JSR166TestCase extends Test
448		AbstractQueuedLongSynchronizerTest.suite(),
449		ArrayBlockingQueueTest.suite(),
450		ArrayDequeTest.suite(),
451	+	ArrayListTest.suite(),
452		AtomicBooleanTest.suite(),
453		AtomicIntegerArrayTest.suite(),
454		AtomicIntegerFieldUpdaterTest.suite(),
#	Line 340 | Line 471 | public class JSR166TestCase extends Test
471		CopyOnWriteArrayListTest.suite(),
472		CopyOnWriteArraySetTest.suite(),
473		CountDownLatchTest.suite(),
474	+	CountedCompleterTest.suite(),
475		CyclicBarrierTest.suite(),
476		DelayQueueTest.suite(),
477		EntryTest.suite(),
#	Line 368 | Line 500 | public class JSR166TestCase extends Test
500		TreeMapTest.suite(),
501		TreeSetTest.suite(),
502		TreeSubMapTest.suite(),
503	<	TreeSubSetTest.suite());
503	>	TreeSubSetTest.suite(),
504	>	VectorTest.suite());
505
506		// Java8+ test classes
507		if (atLeastJava8()) {
508		String[] java8TestClassNames = {
509	+	"ArrayDeque8Test",
510		"Atomic8Test",
511		"CompletableFutureTest",
512		"ConcurrentHashMap8Test",
513	<	"CountedCompleterTest",
513	>	"CountedCompleter8Test",
514		"DoubleAccumulatorTest",
515		"DoubleAdderTest",
516		"ForkJoinPool8Test",
#	Line 387 | Line 521 | public class JSR166TestCase extends Test
521		"StampedLockTest",
522		"SubmissionPublisherTest",
523		"ThreadLocalRandom8Test",
524	+	"TimeUnit8Test",
525		};
526		addNamedTestClasses(suite, java8TestClassNames);
527		}
#	Line 394 | Line 529 | public class JSR166TestCase extends Test
529		// Java9+ test classes
530		if (atLeastJava9()) {
531		String[] java9TestClassNames = {
532	<	// Currently empty, but expecting varhandle tests
532	>	"AtomicBoolean9Test",
533	>	"AtomicInteger9Test",
534	>	"AtomicIntegerArray9Test",
535	>	"AtomicLong9Test",
536	>	"AtomicLongArray9Test",
537	>	"AtomicReference9Test",
538	>	"AtomicReferenceArray9Test",
539	>	"ExecutorCompletionService9Test",
540		};
541		addNamedTestClasses(suite, java9TestClassNames);
542		}
#	Line 461 | Line 603 | public class JSR166TestCase extends Test
603		} else {
604		return new TestSuite();
605		}
464	–
606		}
607
608		// Delays for timing-dependent tests, in milliseconds.
#	Line 472 | Line 613 | public class JSR166TestCase extends Test
613		public static long LONG_DELAY_MS;
614
615		/**
616	<	* Returns the shortest timed delay. This could
617	<	* be reimplemented to use for example a Property.
616	>	* Returns the shortest timed delay. This can be scaled up for
617	>	* slow machines using the jsr166.delay.factor system property,
618	>	* or via jtreg's -timeoutFactor: flag.
619	>	* http://openjdk.java.net/jtreg/command-help.html
620		*/
621		protected long getShortDelay() {
622	<	return 50;
622	>	return (long) (50 * delayFactor);
623		}
624
625		/**
#	Line 519 | Line 662 | public class JSR166TestCase extends Test
662		* the same test have no effect.
663		*/
664		public void threadRecordFailure(Throwable t) {
665	+	System.err.println(t);
666	+	dumpTestThreads();
667		threadFailure.compareAndSet(null, t);
668		}
669
#	Line 529 | Line 674 | public class JSR166TestCase extends Test
674		void tearDownFail(String format, Object... args) {
675		String msg = toString() + ": " + String.format(format, args);
676		System.err.println(msg);
677	<	printAllStackTraces();
677	>	dumpTestThreads();
678		throw new AssertionFailedError(msg);
679		}
680
#	Line 566 | Line 711 | public class JSR166TestCase extends Test
711		}
712
713		/**
714	<	* Finds missing try { ... } finally { joinPool(e); }
714	>	* Finds missing PoolCleaners
715		*/
716		void checkForkJoinPoolThreadLeaks() throws InterruptedException {
717		Thread[] survivors = new Thread[7];
#	Line 598 | Line 743 | public class JSR166TestCase extends Test
743		fail(reason);
744		} catch (AssertionFailedError t) {
745		threadRecordFailure(t);
746	<	fail(reason);
746	>	throw t;
747		}
748		}
749
#	Line 725 | Line 870 | public class JSR166TestCase extends Test
870		/**
871		* Delays, via Thread.sleep, for the given millisecond delay, but
872		* if the sleep is shorter than specified, may re-sleep or yield
873	<	* until time elapses.
873	>	* until time elapses.  Ensures that the given time, as measured
874	>	* by System.nanoTime(), has elapsed.
875		*/
876		static void delay(long millis) throws InterruptedException {
877	<	long startTime = System.nanoTime();
878	<	long ns = millis * 1000 * 1000;
879	<	for (;;) {
877	>	long nanos = millis * (1000 * 1000);
878	>	final long wakeupTime = System.nanoTime() + nanos;
879	>	do {
880		if (millis > 0L)
881		Thread.sleep(millis);
882		else // too short to sleep
883		Thread.yield();
884	<	long d = ns - (System.nanoTime() - startTime);
885	<	if (d > 0L)
886	<	millis = d / (1000 * 1000);
741	<	else
742	<	break;
743	<	}
884	>	nanos = wakeupTime - System.nanoTime();
885	>	millis = nanos / (1000 * 1000);
886	>	} while (nanos >= 0L);
887		}
888
889		/**
890		* Allows use of try-with-resources with per-test thread pools.
891		*/
892	<	static class PoolCloser<T extends ExecutorService>
893	<	implements AutoCloseable {
894	<	public final T pool;
752	<	public PoolCloser(T pool) { this.pool = pool; }
892	>	class PoolCleaner implements AutoCloseable {
893	>	private final ExecutorService pool;
894	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
895		public void close() { joinPool(pool); }
896		}
897
898		/**
899	+	* An extension of PoolCleaner that has an action to release the pool.
900	+	*/
901	+	class PoolCleanerWithReleaser extends PoolCleaner {
902	+	private final Runnable releaser;
903	+	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
904	+	super(pool);
905	+	this.releaser = releaser;
906	+	}
907	+	public void close() {
908	+	try {
909	+	releaser.run();
910	+	} finally {
911	+	super.close();
912	+	}
913	+	}
914	+	}
915	+
916	+	PoolCleaner cleaner(ExecutorService pool) {
917	+	return new PoolCleaner(pool);
918	+	}
919	+
920	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
921	+	return new PoolCleanerWithReleaser(pool, releaser);
922	+	}
923	+
924	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
925	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
926	+	}
927	+
928	+	Runnable releaser(final CountDownLatch latch) {
929	+	return new Runnable() { public void run() {
930	+	do { latch.countDown(); }
931	+	while (latch.getCount() > 0);
932	+	}};
933	+	}
934	+
935	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
936	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
937	+	}
938	+
939	+	Runnable releaser(final AtomicBoolean flag) {
940	+	return new Runnable() { public void run() { flag.set(true); }};
941	+	}
942	+
943	+	/**
944		* Waits out termination of a thread pool or fails doing so.
945		*/
946	<	static void joinPool(ExecutorService pool) {
946	>	void joinPool(ExecutorService pool) {
947		try {
948		pool.shutdown();
949	<	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS))
950	<	fail("ExecutorService " + pool +
951	<	" did not terminate in a timely manner");
949	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
950	>	try {
951	>	threadFail("ExecutorService " + pool +
952	>	" did not terminate in a timely manner");
953	>	} finally {
954	>	// last resort, for the benefit of subsequent tests
955	>	pool.shutdownNow();
956	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
957	>	}
958	>	}
959		} catch (SecurityException ok) {
960		// Allowed in case test doesn't have privs
961		} catch (InterruptedException fail) {
962	<	fail("Unexpected InterruptedException");
962	>	threadFail("Unexpected InterruptedException");
963		}
964		}
965
966	<	/** Like Runnable, but with the freedom to throw anything */
966	>	/**
967	>	* Like Runnable, but with the freedom to throw anything.
968	>	* junit folks had the same idea:
969	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
970	>	*/
971		interface Action { public void run() throws Throwable; }
972
973		/**
#	Line 779 | Line 977 | public class JSR166TestCase extends Test
977		*/
978		void testInParallel(Action ... actions) {
979		ExecutorService pool = Executors.newCachedThreadPool();
980	<	try {
980	>	try (PoolCleaner cleaner = cleaner(pool)) {
981		ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
982		for (final Action action : actions)
983		futures.add(pool.submit(new CheckedRunnable() {
#	Line 792 | Line 990 | public class JSR166TestCase extends Test
990		} catch (Exception ex) {
991		threadUnexpectedException(ex);
992		}
795	–	} finally {
796	–	joinPool(pool);
993		}
994		}
995
996		/**
997	<	* A debugging tool to print all stack traces, as jstack does.
997	>	* A debugging tool to print stack traces of most threads, as jstack does.
998		* Uninteresting threads are filtered out.
999		*/
1000	<	static void printAllStackTraces() {
1000	>	static void dumpTestThreads() {
1001	>	SecurityManager sm = System.getSecurityManager();
1002	>	if (sm != null) {
1003	>	try {
1004	>	System.setSecurityManager(null);
1005	>	} catch (SecurityException giveUp) {
1006	>	return;
1007	>	}
1008	>	}
1009	>
1010		ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1011		System.err.println("------ stacktrace dump start ------");
1012		for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1013	<	String name = info.getThreadName();
1013	>	final String name = info.getThreadName();
1014	>	String lockName;
1015		if ("Signal Dispatcher".equals(name))
1016		continue;
1017		if ("Reference Handler".equals(name)
1018	<	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
1018	>	&& (lockName = info.getLockName()) != null
1019	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1020		continue;
1021		if ("Finalizer".equals(name)
1022	<	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
1022	>	&& (lockName = info.getLockName()) != null
1023	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1024	>	continue;
1025	>	if ("checkForWedgedTest".equals(name))
1026		continue;
1027		System.err.print(info);
1028		}
1029		System.err.println("------ stacktrace dump end ------");
1030	+
1031	+	if (sm != null) System.setSecurityManager(sm);
1032		}
1033
1034		/**
#	Line 836 | Line 1048 | public class JSR166TestCase extends Test
1048		delay(millis);
1049		assertTrue(thread.isAlive());
1050		} catch (InterruptedException fail) {
1051	<	fail("Unexpected InterruptedException");
1051	>	threadFail("Unexpected InterruptedException");
1052		}
1053		}
1054
#	Line 858 | Line 1070 | public class JSR166TestCase extends Test
1070		for (Thread thread : threads)
1071		assertTrue(thread.isAlive());
1072		} catch (InterruptedException fail) {
1073	<	fail("Unexpected InterruptedException");
1073	>	threadFail("Unexpected InterruptedException");
1074		}
1075		}
1076
#	Line 1033 | Line 1245 | public class JSR166TestCase extends Test
1245		* Sleeps until the given time has elapsed.
1246		* Throws AssertionFailedError if interrupted.
1247		*/
1248	<	void sleep(long millis) {
1248	>	static void sleep(long millis) {
1249		try {
1250		delay(millis);
1251		} catch (InterruptedException fail) {
#	Line 1049 | Line 1261 | public class JSR166TestCase extends Test
1261		* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1262		*/
1263		void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1264	<	long startTime = System.nanoTime();
1264	>	long startTime = 0L;
1265		for (;;) {
1266		Thread.State s = thread.getState();
1267		if (s == Thread.State.BLOCKED ||
#	Line 1058 | Line 1270 | public class JSR166TestCase extends Test
1270		return;
1271		else if (s == Thread.State.TERMINATED)
1272		fail("Unexpected thread termination");
1273	+	else if (startTime == 0L)
1274	+	startTime = System.nanoTime();
1275		else if (millisElapsedSince(startTime) > timeoutMillis) {
1276		threadAssertTrue(thread.isAlive());
1277		return;
#	Line 1136 | Line 1350 | public class JSR166TestCase extends Test
1350		} finally {
1351		if (t.getState() != Thread.State.TERMINATED) {
1352		t.interrupt();
1353	<	fail("Test timed out");
1353	>	threadFail("timed out waiting for thread to terminate");
1354		}
1355		}
1356		}
#	Line 1284 | Line 1498 | public class JSR166TestCase extends Test
1498		}};
1499		}
1500
1501	<	public Runnable awaiter(final CountDownLatch latch) {
1502	<	return new CheckedRunnable() {
1503	<	public void realRun() throws InterruptedException {
1504	<	await(latch);
1505	<	}};
1501	>	class LatchAwaiter extends CheckedRunnable {
1502	>	static final int NEW = 0;
1503	>	static final int RUNNING = 1;
1504	>	static final int DONE = 2;
1505	>	final CountDownLatch latch;
1506	>	int state = NEW;
1507	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1508	>	public void realRun() throws InterruptedException {
1509	>	state = 1;
1510	>	await(latch);
1511	>	state = 2;
1512	>	}
1513		}
1514
1515	<	public void await(CountDownLatch latch) {
1515	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1516	>	return new LatchAwaiter(latch);
1517	>	}
1518	>
1519	>	public void await(CountDownLatch latch, long timeoutMillis) {
1520		try {
1521	<	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1521	>	if (!latch.await(timeoutMillis, MILLISECONDS))
1522	>	fail("timed out waiting for CountDownLatch for "
1523	>	+ (timeoutMillis/1000) + " sec");
1524		} catch (Throwable fail) {
1525		threadUnexpectedException(fail);
1526		}
1527		}
1528
1529	+	public void await(CountDownLatch latch) {
1530	+	await(latch, LONG_DELAY_MS);
1531	+	}
1532	+
1533		public void await(Semaphore semaphore) {
1534		try {
1535	<	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1535	>	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1536	>	fail("timed out waiting for Semaphore for "
1537	>	+ (LONG_DELAY_MS/1000) + " sec");
1538		} catch (Throwable fail) {
1539		threadUnexpectedException(fail);
1540		}
#	Line 1531 | Line 1764 | public class JSR166TestCase extends Test
1764		* A CyclicBarrier that uses timed await and fails with
1765		* AssertionFailedErrors instead of throwing checked exceptions.
1766		*/
1767	<	public class CheckedBarrier extends CyclicBarrier {
1767	>	public static class CheckedBarrier extends CyclicBarrier {
1768		public CheckedBarrier(int parties) { super(parties); }
1769
1770		public int await() {
#	Line 1595 | Line 1828 | public class JSR166TestCase extends Test
1828		}
1829		}
1830
1831	+	void assertImmutable(final Object o) {
1832	+	if (o instanceof Collection) {
1833	+	assertThrows(
1834	+	UnsupportedOperationException.class,
1835	+	new Runnable() { public void run() {
1836	+	((Collection) o).add(null);}});
1837	+	}
1838	+	}
1839	+
1840		@SuppressWarnings("unchecked")
1841		<T> T serialClone(T o) {
1842		try {
1843		ObjectInputStream ois = new ObjectInputStream
1844		(new ByteArrayInputStream(serialBytes(o)));
1845		T clone = (T) ois.readObject();
1846	+	if (o == clone) assertImmutable(o);
1847		assertSame(o.getClass(), clone.getClass());
1848		return clone;
1849		} catch (Throwable fail) {
#	Line 1609 | Line 1852 | public class JSR166TestCase extends Test
1852		}
1853		}
1854
1855	+	/**
1856	+	* A version of serialClone that leaves error handling (for
1857	+	* e.g. NotSerializableException) up to the caller.
1858	+	*/
1859	+	@SuppressWarnings("unchecked")
1860	+	<T> T serialClonePossiblyFailing(T o)
1861	+	throws ReflectiveOperationException, java.io.IOException {
1862	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1863	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1864	+	oos.writeObject(o);
1865	+	oos.flush();
1866	+	oos.close();
1867	+	ObjectInputStream ois = new ObjectInputStream
1868	+	(new ByteArrayInputStream(bos.toByteArray()));
1869	+	T clone = (T) ois.readObject();
1870	+	if (o == clone) assertImmutable(o);
1871	+	assertSame(o.getClass(), clone.getClass());
1872	+	return clone;
1873	+	}
1874	+
1875	+	/**
1876	+	* If o implements Cloneable and has a public clone method,
1877	+	* returns a clone of o, else null.
1878	+	*/
1879	+	@SuppressWarnings("unchecked")
1880	+	<T> T cloneableClone(T o) {
1881	+	if (!(o instanceof Cloneable)) return null;
1882	+	final T clone;
1883	+	try {
1884	+	clone = (T) o.getClass().getMethod("clone").invoke(o);
1885	+	} catch (NoSuchMethodException ok) {
1886	+	return null;
1887	+	} catch (ReflectiveOperationException unexpected) {
1888	+	throw new Error(unexpected);
1889	+	}
1890	+	assertNotSame(o, clone); // not 100% guaranteed by spec
1891	+	assertSame(o.getClass(), clone.getClass());
1892	+	return clone;
1893	+	}
1894	+
1895		public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1896		Runnable... throwingActions) {
1897		for (Runnable throwingAction : throwingActions) {
#	Line 1637 | Line 1920 | public class JSR166TestCase extends Test
1920		} catch (NoSuchElementException success) {}
1921		assertFalse(it.hasNext());
1922		}
1923	+
1924	+	public <T> Callable<T> callableThrowing(final Exception ex) {
1925	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1926	+	}
1927	+
1928	+	public Runnable runnableThrowing(final RuntimeException ex) {
1929	+	return new Runnable() { public void run() { throw ex; }};
1930	+	}
1931	+
1932	+	/** A reusable thread pool to be shared by tests. */
1933	+	static final ExecutorService cachedThreadPool =
1934	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1935	+	1000L, MILLISECONDS,
1936	+	new SynchronousQueue<Runnable>());
1937	+
1938	+	static <T> void shuffle(T[] array) {
1939	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1940	+	}
1941		}

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