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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.169 by jsr166, Thu Oct 8 21:50:26 2015 UTC vs.
Revision 1.224 by jsr166, Sat May 13 21:43:50 2017 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
2	>	* Written by Doug Lea and Martin Buchholz with assistance from
3	>	* members of JCP JSR-166 Expert Group and released to the public
4	>	* domain, as explained at
5		* http://creativecommons.org/publicdomain/zero/1.0/
6		* Other contributors include Andrew Wright, Jeffrey Hayes,
7		* Pat Fisher, Mike Judd.
8		*/
9
10	+	/*
11	+	* @test
12	+	* @summary JSR-166 tck tests, in a number of variations.
13	+	*          The first is the conformance testing variant,
14	+	*          while others also test implementation details.
15	+	* @build *
16	+	* @modules java.management
17	+	* @run junit/othervm/timeout=1000 JSR166TestCase
18	+	* @run junit/othervm/timeout=1000
19	+	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
20	+	*      --add-opens java.base/java.lang=ALL-UNNAMED
21	+	*      -Djsr166.testImplementationDetails=true
22	+	*      JSR166TestCase
23	+	* @run junit/othervm/timeout=1000
24	+	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
25	+	*      --add-opens java.base/java.lang=ALL-UNNAMED
26	+	*      -Djsr166.testImplementationDetails=true
27	+	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=0
28	+	*      JSR166TestCase
29	+	* @run junit/othervm/timeout=1000
30	+	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
31	+	*      --add-opens java.base/java.lang=ALL-UNNAMED
32	+	*      -Djsr166.testImplementationDetails=true
33	+	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=1
34	+	*      -Djava.util.secureRandomSeed=true
35	+	*      JSR166TestCase
36	+	* @run junit/othervm/timeout=1000/policy=tck.policy
37	+	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
38	+	*      --add-opens java.base/java.lang=ALL-UNNAMED
39	+	*      -Djsr166.testImplementationDetails=true
40	+	*      JSR166TestCase
41	+	*/
42	+
43		import static java.util.concurrent.TimeUnit.MILLISECONDS;
44		import static java.util.concurrent.TimeUnit.MINUTES;
45		import static java.util.concurrent.TimeUnit.NANOSECONDS;
#	Line 29 | Line 63 | import java.security.ProtectionDomain;
63		import java.security.SecurityPermission;
64		import java.util.ArrayList;
65		import java.util.Arrays;
66	+	import java.util.Collection;
67	+	import java.util.Collections;
68		import java.util.Date;
69		import java.util.Enumeration;
70		import java.util.Iterator;
#	Line 48 | Line 84 | import java.util.concurrent.RecursiveAct
84		import java.util.concurrent.RecursiveTask;
85		import java.util.concurrent.RejectedExecutionHandler;
86		import java.util.concurrent.Semaphore;
87	+	import java.util.concurrent.SynchronousQueue;
88		import java.util.concurrent.ThreadFactory;
89	+	import java.util.concurrent.ThreadLocalRandom;
90		import java.util.concurrent.ThreadPoolExecutor;
91		import java.util.concurrent.TimeoutException;
92	+	import java.util.concurrent.atomic.AtomicBoolean;
93		import java.util.concurrent.atomic.AtomicReference;
94		import java.util.regex.Pattern;
95
#	Line 109 | Line 148 | import junit.framework.TestSuite;
148		* methods as there are exceptions the method can throw. Sometimes
149		* there are multiple tests per JSR166 method when the different
150		* "normal" behaviors differ significantly. And sometimes testcases
151	<	* cover multiple methods when they cannot be tested in
113	<	* isolation.
151	>	* cover multiple methods when they cannot be tested in isolation.
152		*
153		* <li>The documentation style for testcases is to provide as javadoc
154		* a simple sentence or two describing the property that the testcase
#	Line 173 | Line 211 | public class JSR166TestCase extends Test
211		private static final int suiteRuns =
212		Integer.getInteger("jsr166.suiteRuns", 1);
213
214	+	/**
215	+	* Returns the value of the system property, or NaN if not defined.
216	+	*/
217	+	private static float systemPropertyValue(String name) {
218	+	String floatString = System.getProperty(name);
219	+	if (floatString == null)
220	+	return Float.NaN;
221	+	try {
222	+	return Float.parseFloat(floatString);
223	+	} catch (NumberFormatException ex) {
224	+	throw new IllegalArgumentException(
225	+	String.format("Bad float value in system property %s=%s",
226	+	name, floatString));
227	+	}
228	+	}
229	+
230	+	/**
231	+	* The scaling factor to apply to standard delays used in tests.
232	+	* May be initialized from any of:
233	+	* - the "jsr166.delay.factor" system property
234	+	* - the "test.timeout.factor" system property (as used by jtreg)
235	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
236	+	* - hard-coded fuzz factor when using a known slowpoke VM
237	+	*/
238	+	private static final float delayFactor = delayFactor();
239	+
240	+	private static float delayFactor() {
241	+	float x;
242	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
243	+	return x;
244	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
245	+	return x;
246	+	String prop = System.getProperty("java.vm.version");
247	+	if (prop != null && prop.matches(".*debug.*"))
248	+	return 4.0f; // How much slower is fastdebug than product?!
249	+	return 1.0f;
250	+	}
251	+
252		public JSR166TestCase() { super(); }
253		public JSR166TestCase(String name) { super(name); }
254
#	Line 188 | Line 264 | public class JSR166TestCase extends Test
264		return (regex == null) ? null : Pattern.compile(regex);
265		}
266
267	+	// Instrumentation to debug very rare, but very annoying hung test runs.
268		static volatile TestCase currentTestCase;
269	+	// static volatile int currentRun = 0;
270		static {
271		Runnable checkForWedgedTest = new Runnable() { public void run() {
272	<	// avoid spurious reports with enormous runsPerTest
273	<	final int timeoutMinutes = Math.max(runsPerTest / 10, 1);
272	>	// Avoid spurious reports with enormous runsPerTest.
273	>	// A single test case run should never take more than 1 second.
274	>	// But let's cap it at the high end too ...
275	>	final int timeoutMinutes =
276	>	Math.min(15, Math.max(runsPerTest / 60, 1));
277		for (TestCase lastTestCase = currentTestCase;;) {
278		try { MINUTES.sleep(timeoutMinutes); }
279		catch (InterruptedException unexpected) { break; }
280		if (lastTestCase == currentTestCase) {
281	<	System.err.println
282	<	("Looks like we're stuck running test: "
283	<	+ lastTestCase);
284	<	System.err.println("availableProcessors=" +
285	<	Runtime.getRuntime().availableProcessors());
281	>	System.err.printf(
282	>	"Looks like we're stuck running test: %s%n",
283	>	lastTestCase);
284	>	//                     System.err.printf(
285	>	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
286	>	//                         lastTestCase, currentRun, runsPerTest);
287	>	//                     System.err.println("availableProcessors=" +
288	>	//                         Runtime.getRuntime().availableProcessors());
289	>	//                     System.err.printf("cpu model = %s%n", cpuModel());
290		dumpTestThreads();
291		// one stack dump is probably enough; more would be spam
292		break;
#	Line 213 | Line 298 | public class JSR166TestCase extends Test
298		thread.start();
299		}
300
301	+	//     public static String cpuModel() {
302	+	//         try {
303	+	//             java.util.regex.Matcher matcher
304	+	//               = Pattern.compile("model name\\s*: (.*)")
305	+	//                 .matcher(new String(
306	+	//                     java.nio.file.Files.readAllBytes(
307	+	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
308	+	//             matcher.find();
309	+	//             return matcher.group(1);
310	+	//         } catch (Exception ex) { return null; }
311	+	//     }
312	+
313		public void runBare() throws Throwable {
314		currentTestCase = this;
315		if (methodFilter == null
#	Line 222 | Line 319 | public class JSR166TestCase extends Test
319
320		protected void runTest() throws Throwable {
321		for (int i = 0; i < runsPerTest; i++) {
322	+	// currentRun = i;
323		if (profileTests)
324		runTestProfiled();
325		else
#	Line 250 | Line 348 | public class JSR166TestCase extends Test
348		main(suite(), args);
349		}
350
351	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
352	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
353	+	long runTime;
354	+	public void startTest(Test test) {}
355	+	protected void printHeader(long runTime) {
356	+	this.runTime = runTime; // defer printing for later
357	+	}
358	+	protected void printFooter(TestResult result) {
359	+	if (result.wasSuccessful()) {
360	+	getWriter().println("OK (" + result.runCount() + " tests)"
361	+	+ "  Time: " + elapsedTimeAsString(runTime));
362	+	} else {
363	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
364	+	super.printFooter(result);
365	+	}
366	+	}
367	+	}
368	+
369	+	/**
370	+	* Returns a TestRunner that doesn't bother with unnecessary
371	+	* fluff, like printing a "." for each test case.
372	+	*/
373	+	static junit.textui.TestRunner newPithyTestRunner() {
374	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
375	+	runner.setPrinter(new PithyResultPrinter(System.out));
376	+	return runner;
377	+	}
378	+
379		/**
380		* Runs all unit tests in the given test suite.
381		* Actual behavior influenced by jsr166.* system properties.
#	Line 261 | Line 387 | public class JSR166TestCase extends Test
387		System.setSecurityManager(new SecurityManager());
388		}
389		for (int i = 0; i < suiteRuns; i++) {
390	<	TestResult result = junit.textui.TestRunner.run(suite);
390	>	TestResult result = newPithyTestRunner().doRun(suite);
391		if (!result.wasSuccessful())
392		System.exit(1);
393		System.gc();
#	Line 345 | Line 471 | public class JSR166TestCase extends Test
471		AbstractQueuedLongSynchronizerTest.suite(),
472		ArrayBlockingQueueTest.suite(),
473		ArrayDequeTest.suite(),
474	+	ArrayListTest.suite(),
475		AtomicBooleanTest.suite(),
476		AtomicIntegerArrayTest.suite(),
477		AtomicIntegerFieldUpdaterTest.suite(),
#	Line 367 | Line 494 | public class JSR166TestCase extends Test
494		CopyOnWriteArrayListTest.suite(),
495		CopyOnWriteArraySetTest.suite(),
496		CountDownLatchTest.suite(),
497	+	CountedCompleterTest.suite(),
498		CyclicBarrierTest.suite(),
499		DelayQueueTest.suite(),
500		EntryTest.suite(),
#	Line 395 | Line 523 | public class JSR166TestCase extends Test
523		TreeMapTest.suite(),
524		TreeSetTest.suite(),
525		TreeSubMapTest.suite(),
526	<	TreeSubSetTest.suite());
526	>	TreeSubSetTest.suite(),
527	>	VectorTest.suite());
528
529		// Java8+ test classes
530		if (atLeastJava8()) {
531		String[] java8TestClassNames = {
532	+	"ArrayDeque8Test",
533		"Atomic8Test",
534		"CompletableFutureTest",
535		"ConcurrentHashMap8Test",
536	<	"CountedCompleterTest",
536	>	"CountedCompleter8Test",
537		"DoubleAccumulatorTest",
538		"DoubleAdderTest",
539		"ForkJoinPool8Test",
540		"ForkJoinTask8Test",
541	+	"LinkedBlockingDeque8Test",
542	+	"LinkedBlockingQueue8Test",
543		"LongAccumulatorTest",
544		"LongAdderTest",
545		"SplittableRandomTest",
546		"StampedLockTest",
547		"SubmissionPublisherTest",
548		"ThreadLocalRandom8Test",
549	+	"TimeUnit8Test",
550		};
551		addNamedTestClasses(suite, java8TestClassNames);
552		}
#	Line 421 | Line 554 | public class JSR166TestCase extends Test
554		// Java9+ test classes
555		if (atLeastJava9()) {
556		String[] java9TestClassNames = {
557	<	// Currently empty, but expecting varhandle tests
557	>	"AtomicBoolean9Test",
558	>	"AtomicInteger9Test",
559	>	"AtomicIntegerArray9Test",
560	>	"AtomicLong9Test",
561	>	"AtomicLongArray9Test",
562	>	"AtomicReference9Test",
563	>	"AtomicReferenceArray9Test",
564	>	"ExecutorCompletionService9Test",
565	>	"ForkJoinPool9Test",
566		};
567		addNamedTestClasses(suite, java9TestClassNames);
568		}
#	Line 432 | Line 573 | public class JSR166TestCase extends Test
573		/** Returns list of junit-style test method names in given class. */
574		public static ArrayList<String> testMethodNames(Class<?> testClass) {
575		Method[] methods = testClass.getDeclaredMethods();
576	<	ArrayList<String> names = new ArrayList<String>(methods.length);
576	>	ArrayList<String> names = new ArrayList<>(methods.length);
577		for (Method method : methods) {
578		if (method.getName().startsWith("test")
579		&& Modifier.isPublic(method.getModifiers())
#	Line 498 | Line 639 | public class JSR166TestCase extends Test
639		public static long LONG_DELAY_MS;
640
641		/**
642	<	* Returns the shortest timed delay. This could
643	<	* be reimplemented to use for example a Property.
642	>	* Returns the shortest timed delay. This can be scaled up for
643	>	* slow machines using the jsr166.delay.factor system property,
644	>	* or via jtreg's -timeoutFactor: flag.
645	>	* http://openjdk.java.net/jtreg/command-help.html
646		*/
647		protected long getShortDelay() {
648	<	return 50;
648	>	return (long) (50 * delayFactor);
649		}
650
651		/**
#	Line 515 | Line 658 | public class JSR166TestCase extends Test
658		LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
659		}
660
661	+	private static final long TIMEOUT_DELAY_MS
662	+	= (long) (12.0 * Math.cbrt(delayFactor));
663	+
664		/**
665	<	* Returns a timeout in milliseconds to be used in tests that
666	<	* verify that operations block or time out.
665	>	* Returns a timeout in milliseconds to be used in tests that verify
666	>	* that operations block or time out.  We want this to be longer
667	>	* than the OS scheduling quantum, but not too long, so don't scale
668	>	* linearly with delayFactor; we use "crazy" cube root instead.
669		*/
670	<	long timeoutMillis() {
671	<	return SHORT_DELAY_MS / 4;
670	>	static long timeoutMillis() {
671	>	return TIMEOUT_DELAY_MS;
672		}
673
674		/**
#	Line 536 | Line 684 | public class JSR166TestCase extends Test
684		* The first exception encountered if any threadAssertXXX method fails.
685		*/
686		private final AtomicReference<Throwable> threadFailure
687	<	= new AtomicReference<Throwable>(null);
687	>	= new AtomicReference<>(null);
688
689		/**
690		* Records an exception so that it can be rethrown later in the test
#	Line 815 | Line 963 | public class JSR166TestCase extends Test
963		}};
964		}
965
966	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
967	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
968	+	}
969	+
970	+	Runnable releaser(final AtomicBoolean flag) {
971	+	return new Runnable() { public void run() { flag.set(true); }};
972	+	}
973	+
974		/**
975		* Waits out termination of a thread pool or fails doing so.
976		*/
#	Line 838 | Line 994 | public class JSR166TestCase extends Test
994		}
995		}
996
997	<	/** Like Runnable, but with the freedom to throw anything */
997	>	/**
998	>	* Like Runnable, but with the freedom to throw anything.
999	>	* junit folks had the same idea:
1000	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
1001	>	*/
1002		interface Action { public void run() throws Throwable; }
1003
1004		/**
#	Line 869 | Line 1029 | public class JSR166TestCase extends Test
1029		* Uninteresting threads are filtered out.
1030		*/
1031		static void dumpTestThreads() {
1032	+	SecurityManager sm = System.getSecurityManager();
1033	+	if (sm != null) {
1034	+	try {
1035	+	System.setSecurityManager(null);
1036	+	} catch (SecurityException giveUp) {
1037	+	return;
1038	+	}
1039	+	}
1040	+
1041		ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1042		System.err.println("------ stacktrace dump start ------");
1043		for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1044	<	String name = info.getThreadName();
1044	>	final String name = info.getThreadName();
1045	>	String lockName;
1046		if ("Signal Dispatcher".equals(name))
1047		continue;
1048		if ("Reference Handler".equals(name)
1049	<	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
1049	>	&& (lockName = info.getLockName()) != null
1050	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1051		continue;
1052		if ("Finalizer".equals(name)
1053	<	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
1053	>	&& (lockName = info.getLockName()) != null
1054	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1055		continue;
1056		if ("checkForWedgedTest".equals(name))
1057		continue;
1058		System.err.print(info);
1059		}
1060		System.err.println("------ stacktrace dump end ------");
1061	+
1062	+	if (sm != null) System.setSecurityManager(sm);
1063	+	}
1064	+
1065	+	/**
1066	+	* Checks that thread eventually enters the expected blocked thread state.
1067	+	*/
1068	+	void assertThreadBlocks(Thread thread, Thread.State expected) {
1069	+	// always sleep at least 1 ms, avoiding transitional states
1070	+	// with high probability
1071	+	for (long retries = LONG_DELAY_MS; retries-->0; ) {
1072	+	try { delay(1); }
1073	+	catch (InterruptedException fail) {
1074	+	fail("Unexpected InterruptedException");
1075	+	}
1076	+	Thread.State s = thread.getState();
1077	+	if (s == expected)
1078	+	return;
1079	+	else if (s == Thread.State.TERMINATED)
1080	+	fail("Unexpected thread termination");
1081	+	}
1082	+	fail("timed out waiting for thread to enter thread state " + expected);
1083		}
1084
1085		/**
#	Line 969 | Line 1163 | public class JSR166TestCase extends Test
1163		}
1164
1165		/**
1166	+	* The maximum number of consecutive spurious wakeups we should
1167	+	* tolerate (from APIs like LockSupport.park) before failing a test.
1168	+	*/
1169	+	static final int MAX_SPURIOUS_WAKEUPS = 10;
1170	+
1171	+	/**
1172		* The number of elements to place in collections, arrays, etc.
1173		*/
1174		public static final int SIZE = 20;
#	Line 1072 | Line 1272 | public class JSR166TestCase extends Test
1272		}
1273		public void refresh() {}
1274		public String toString() {
1275	<	List<Permission> ps = new ArrayList<Permission>();
1275	>	List<Permission> ps = new ArrayList<>();
1276		for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1277		ps.add(e.nextElement());
1278		return "AdjustablePolicy with permissions " + ps;
#	Line 1102 | Line 1302 | public class JSR166TestCase extends Test
1302		* Sleeps until the given time has elapsed.
1303		* Throws AssertionFailedError if interrupted.
1304		*/
1305	<	void sleep(long millis) {
1305	>	static void sleep(long millis) {
1306		try {
1307		delay(millis);
1308		} catch (InterruptedException fail) {
#	Line 1118 | Line 1318 | public class JSR166TestCase extends Test
1318		* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1319		*/
1320		void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1321	<	long startTime = System.nanoTime();
1321	>	long startTime = 0L;
1322		for (;;) {
1323		Thread.State s = thread.getState();
1324		if (s == Thread.State.BLOCKED ||
#	Line 1127 | Line 1327 | public class JSR166TestCase extends Test
1327		return;
1328		else if (s == Thread.State.TERMINATED)
1329		fail("Unexpected thread termination");
1330	+	else if (startTime == 0L)
1331	+	startTime = System.nanoTime();
1332		else if (millisElapsedSince(startTime) > timeoutMillis) {
1333		threadAssertTrue(thread.isAlive());
1334	<	return;
1334	>	fail("timed out waiting for thread to enter wait state");
1335		}
1336		Thread.yield();
1337		}
1338		}
1339
1340		/**
1341	<	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1342	<	* state: BLOCKED, WAITING, or TIMED_WAITING.
1341	>	* Spin-waits up to the specified number of milliseconds for the given
1342	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1343	>	* and additionally satisfy the given condition.
1344	>	*/
1345	>	void waitForThreadToEnterWaitState(
1346	>	Thread thread, long timeoutMillis, Callable<Boolean> waitingForGodot) {
1347	>	long startTime = 0L;
1348	>	for (;;) {
1349	>	Thread.State s = thread.getState();
1350	>	if (s == Thread.State.BLOCKED ||
1351	>	s == Thread.State.WAITING ||
1352	>	s == Thread.State.TIMED_WAITING) {
1353	>	try {
1354	>	if (waitingForGodot.call())
1355	>	return;
1356	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1357	>	}
1358	>	else if (s == Thread.State.TERMINATED)
1359	>	fail("Unexpected thread termination");
1360	>	else if (startTime == 0L)
1361	>	startTime = System.nanoTime();
1362	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1363	>	threadAssertTrue(thread.isAlive());
1364	>	fail("timed out waiting for thread to enter wait state");
1365	>	}
1366	>	Thread.yield();
1367	>	}
1368	>	}
1369	>
1370	>	/**
1371	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1372	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1373		*/
1374		void waitForThreadToEnterWaitState(Thread thread) {
1375		waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1376		}
1377
1378		/**
1379	+	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1380	+	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1381	+	* and additionally satisfy the given condition.
1382	+	*/
1383	+	void waitForThreadToEnterWaitState(
1384	+	Thread thread, Callable<Boolean> waitingForGodot) {
1385	+	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1386	+	}
1387	+
1388	+	/**
1389		* Returns the number of milliseconds since time given by
1390		* startNanoTime, which must have been previously returned from a
1391		* call to {@link System#nanoTime()}.
#	Line 1205 | Line 1447 | public class JSR166TestCase extends Test
1447		} finally {
1448		if (t.getState() != Thread.State.TERMINATED) {
1449		t.interrupt();
1450	<	threadFail("Test timed out");
1450	>	threadFail("timed out waiting for thread to terminate");
1451		}
1452		}
1453		}
#	Line 1371 | Line 1613 | public class JSR166TestCase extends Test
1613		return new LatchAwaiter(latch);
1614		}
1615
1616	<	public void await(CountDownLatch latch) {
1616	>	public void await(CountDownLatch latch, long timeoutMillis) {
1617		try {
1618	<	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1618	>	if (!latch.await(timeoutMillis, MILLISECONDS))
1619	>	fail("timed out waiting for CountDownLatch for "
1620	>	+ (timeoutMillis/1000) + " sec");
1621		} catch (Throwable fail) {
1622		threadUnexpectedException(fail);
1623		}
1624		}
1625
1626	+	public void await(CountDownLatch latch) {
1627	+	await(latch, LONG_DELAY_MS);
1628	+	}
1629	+
1630		public void await(Semaphore semaphore) {
1631		try {
1632	<	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1632	>	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1633	>	fail("timed out waiting for Semaphore for "
1634	>	+ (LONG_DELAY_MS/1000) + " sec");
1635		} catch (Throwable fail) {
1636		threadUnexpectedException(fail);
1637		}
#	Line 1611 | Line 1861 | public class JSR166TestCase extends Test
1861		* A CyclicBarrier that uses timed await and fails with
1862		* AssertionFailedErrors instead of throwing checked exceptions.
1863		*/
1864	<	public class CheckedBarrier extends CyclicBarrier {
1864	>	public static class CheckedBarrier extends CyclicBarrier {
1865		public CheckedBarrier(int parties) { super(parties); }
1866
1867		public int await() {
#	Line 1675 | Line 1925 | public class JSR166TestCase extends Test
1925		}
1926		}
1927
1928	+	void assertImmutable(final Object o) {
1929	+	if (o instanceof Collection) {
1930	+	assertThrows(
1931	+	UnsupportedOperationException.class,
1932	+	new Runnable() { public void run() {
1933	+	((Collection) o).add(null);}});
1934	+	}
1935	+	}
1936	+
1937		@SuppressWarnings("unchecked")
1938		<T> T serialClone(T o) {
1939		try {
1940		ObjectInputStream ois = new ObjectInputStream
1941		(new ByteArrayInputStream(serialBytes(o)));
1942		T clone = (T) ois.readObject();
1943	+	if (o == clone) assertImmutable(o);
1944		assertSame(o.getClass(), clone.getClass());
1945		return clone;
1946		} catch (Throwable fail) {
#	Line 1689 | Line 1949 | public class JSR166TestCase extends Test
1949		}
1950		}
1951
1952	+	/**
1953	+	* A version of serialClone that leaves error handling (for
1954	+	* e.g. NotSerializableException) up to the caller.
1955	+	*/
1956	+	@SuppressWarnings("unchecked")
1957	+	<T> T serialClonePossiblyFailing(T o)
1958	+	throws ReflectiveOperationException, java.io.IOException {
1959	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1960	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1961	+	oos.writeObject(o);
1962	+	oos.flush();
1963	+	oos.close();
1964	+	ObjectInputStream ois = new ObjectInputStream
1965	+	(new ByteArrayInputStream(bos.toByteArray()));
1966	+	T clone = (T) ois.readObject();
1967	+	if (o == clone) assertImmutable(o);
1968	+	assertSame(o.getClass(), clone.getClass());
1969	+	return clone;
1970	+	}
1971	+
1972	+	/**
1973	+	* If o implements Cloneable and has a public clone method,
1974	+	* returns a clone of o, else null.
1975	+	*/
1976	+	@SuppressWarnings("unchecked")
1977	+	<T> T cloneableClone(T o) {
1978	+	if (!(o instanceof Cloneable)) return null;
1979	+	final T clone;
1980	+	try {
1981	+	clone = (T) o.getClass().getMethod("clone").invoke(o);
1982	+	} catch (NoSuchMethodException ok) {
1983	+	return null;
1984	+	} catch (ReflectiveOperationException unexpected) {
1985	+	throw new Error(unexpected);
1986	+	}
1987	+	assertNotSame(o, clone); // not 100% guaranteed by spec
1988	+	assertSame(o.getClass(), clone.getClass());
1989	+	return clone;
1990	+	}
1991	+
1992		public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1993		Runnable... throwingActions) {
1994		for (Runnable throwingAction : throwingActions) {
#	Line 1717 | Line 2017 | public class JSR166TestCase extends Test
2017		} catch (NoSuchElementException success) {}
2018		assertFalse(it.hasNext());
2019		}
2020	+
2021	+	public <T> Callable<T> callableThrowing(final Exception ex) {
2022	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
2023	+	}
2024	+
2025	+	public Runnable runnableThrowing(final RuntimeException ex) {
2026	+	return new Runnable() { public void run() { throw ex; }};
2027	+	}
2028	+
2029	+	/** A reusable thread pool to be shared by tests. */
2030	+	static final ExecutorService cachedThreadPool =
2031	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
2032	+	1000L, MILLISECONDS,
2033	+	new SynchronousQueue<Runnable>());
2034	+
2035	+	static <T> void shuffle(T[] array) {
2036	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
2037	+	}
2038		}

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