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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.168 by jsr166, Mon Oct 5 22:53:25 2015 UTC vs.
Revision 1.220 by jsr166, Sat Mar 11 17:33:32 2017 UTC

#	Line 6 | Line 6
6		* Pat Fisher, Mike Judd.
7		*/
8
9	+	/*
10	+	* @test
11	+	* @summary JSR-166 tck tests (conformance testing mode)
12	+	* @build *
13	+	* @modules java.management
14	+	* @run junit/othervm/timeout=1000 JSR166TestCase
15	+	*/
16	+
17	+	/*
18	+	* @test
19	+	* @summary JSR-166 tck tests (whitebox tests allowed)
20	+	* @build *
21	+	* @modules java.base/java.util.concurrent:open
22	+	*          java.base/java.lang:open
23	+	*          java.management
24	+	* @run junit/othervm/timeout=1000
25	+	*      -Djsr166.testImplementationDetails=true
26	+	*      JSR166TestCase
27	+	* @run junit/othervm/timeout=1000
28	+	*      -Djsr166.testImplementationDetails=true
29	+	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=0
30	+	*      JSR166TestCase
31	+	* @run junit/othervm/timeout=1000
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	+	*      -Djsr166.testImplementationDetails=true
38	+	*      JSR166TestCase
39	+	*/
40	+
41		import static java.util.concurrent.TimeUnit.MILLISECONDS;
42		import static java.util.concurrent.TimeUnit.MINUTES;
43		import static java.util.concurrent.TimeUnit.NANOSECONDS;
#	Line 29 | Line 61 | import java.security.ProtectionDomain;
61		import java.security.SecurityPermission;
62		import java.util.ArrayList;
63		import java.util.Arrays;
64	+	import java.util.Collection;
65	+	import java.util.Collections;
66		import java.util.Date;
67		import java.util.Enumeration;
68		import java.util.Iterator;
#	Line 48 | Line 82 | import java.util.concurrent.RecursiveAct
82		import java.util.concurrent.RecursiveTask;
83		import java.util.concurrent.RejectedExecutionHandler;
84		import java.util.concurrent.Semaphore;
85	+	import java.util.concurrent.SynchronousQueue;
86		import java.util.concurrent.ThreadFactory;
87	+	import java.util.concurrent.ThreadLocalRandom;
88		import java.util.concurrent.ThreadPoolExecutor;
89		import java.util.concurrent.TimeoutException;
90	+	import java.util.concurrent.atomic.AtomicBoolean;
91		import java.util.concurrent.atomic.AtomicReference;
92		import java.util.regex.Pattern;
93
#	Line 109 | Line 146 | import junit.framework.TestSuite;
146		* methods as there are exceptions the method can throw. Sometimes
147		* there are multiple tests per JSR166 method when the different
148		* "normal" behaviors differ significantly. And sometimes testcases
149	<	* cover multiple methods when they cannot be tested in
113	<	* isolation.
149	>	* cover multiple methods when they cannot be tested in isolation.
150		*
151		* <li>The documentation style for testcases is to provide as javadoc
152		* a simple sentence or two describing the property that the testcase
#	Line 173 | Line 209 | public class JSR166TestCase extends Test
209		private static final int suiteRuns =
210		Integer.getInteger("jsr166.suiteRuns", 1);
211
212	+	/**
213	+	* Returns the value of the system property, or NaN if not defined.
214	+	*/
215	+	private static float systemPropertyValue(String name) {
216	+	String floatString = System.getProperty(name);
217	+	if (floatString == null)
218	+	return Float.NaN;
219	+	try {
220	+	return Float.parseFloat(floatString);
221	+	} catch (NumberFormatException ex) {
222	+	throw new IllegalArgumentException(
223	+	String.format("Bad float value in system property %s=%s",
224	+	name, floatString));
225	+	}
226	+	}
227	+
228	+	/**
229	+	* The scaling factor to apply to standard delays used in tests.
230	+	* May be initialized from any of:
231	+	* - the "jsr166.delay.factor" system property
232	+	* - the "test.timeout.factor" system property (as used by jtreg)
233	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
234	+	* - hard-coded fuzz factor when using a known slowpoke VM
235	+	*/
236	+	private static final float delayFactor = delayFactor();
237	+
238	+	private static float delayFactor() {
239	+	float x;
240	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
241	+	return x;
242	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
243	+	return x;
244	+	String prop = System.getProperty("java.vm.version");
245	+	if (prop != null && prop.matches(".*debug.*"))
246	+	return 4.0f; // How much slower is fastdebug than product?!
247	+	return 1.0f;
248	+	}
249	+
250		public JSR166TestCase() { super(); }
251		public JSR166TestCase(String name) { super(name); }
252
#	Line 188 | Line 262 | public class JSR166TestCase extends Test
262		return (regex == null) ? null : Pattern.compile(regex);
263		}
264
265	+	// Instrumentation to debug very rare, but very annoying hung test runs.
266		static volatile TestCase currentTestCase;
267	+	// static volatile int currentRun = 0;
268		static {
269		Runnable checkForWedgedTest = new Runnable() { public void run() {
270	<	// avoid spurious reports with enormous runsPerTest
271	<	final int timeoutMinutes = Math.max(runsPerTest / 10, 1);
270	>	// Avoid spurious reports with enormous runsPerTest.
271	>	// A single test case run should never take more than 1 second.
272	>	// But let's cap it at the high end too ...
273	>	final int timeoutMinutes =
274	>	Math.min(15, Math.max(runsPerTest / 60, 1));
275		for (TestCase lastTestCase = currentTestCase;;) {
276		try { MINUTES.sleep(timeoutMinutes); }
277		catch (InterruptedException unexpected) { break; }
278		if (lastTestCase == currentTestCase) {
279	<	System.err.println
280	<	("Looks like we're stuck running test: "
281	<	+ lastTestCase);
279	>	System.err.printf(
280	>	"Looks like we're stuck running test: %s%n",
281	>	lastTestCase);
282	>	//                     System.err.printf(
283	>	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
284	>	//                         lastTestCase, currentRun, runsPerTest);
285	>	//                     System.err.println("availableProcessors=" +
286	>	//                         Runtime.getRuntime().availableProcessors());
287	>	//                     System.err.printf("cpu model = %s%n", cpuModel());
288		dumpTestThreads();
289		// one stack dump is probably enough; more would be spam
290		break;
#	Line 211 | Line 296 | public class JSR166TestCase extends Test
296		thread.start();
297		}
298
299	+	//     public static String cpuModel() {
300	+	//         try {
301	+	//             java.util.regex.Matcher matcher
302	+	//               = Pattern.compile("model name\\s*: (.*)")
303	+	//                 .matcher(new String(
304	+	//                     java.nio.file.Files.readAllBytes(
305	+	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
306	+	//             matcher.find();
307	+	//             return matcher.group(1);
308	+	//         } catch (Exception ex) { return null; }
309	+	//     }
310	+
311		public void runBare() throws Throwable {
312		currentTestCase = this;
313		if (methodFilter == null
#	Line 220 | Line 317 | public class JSR166TestCase extends Test
317
318		protected void runTest() throws Throwable {
319		for (int i = 0; i < runsPerTest; i++) {
320	+	// currentRun = i;
321		if (profileTests)
322		runTestProfiled();
323		else
#	Line 248 | Line 346 | public class JSR166TestCase extends Test
346		main(suite(), args);
347		}
348
349	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
350	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
351	+	long runTime;
352	+	public void startTest(Test test) {}
353	+	protected void printHeader(long runTime) {
354	+	this.runTime = runTime; // defer printing for later
355	+	}
356	+	protected void printFooter(TestResult result) {
357	+	if (result.wasSuccessful()) {
358	+	getWriter().println("OK (" + result.runCount() + " tests)"
359	+	+ "  Time: " + elapsedTimeAsString(runTime));
360	+	} else {
361	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
362	+	super.printFooter(result);
363	+	}
364	+	}
365	+	}
366	+
367	+	/**
368	+	* Returns a TestRunner that doesn't bother with unnecessary
369	+	* fluff, like printing a "." for each test case.
370	+	*/
371	+	static junit.textui.TestRunner newPithyTestRunner() {
372	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
373	+	runner.setPrinter(new PithyResultPrinter(System.out));
374	+	return runner;
375	+	}
376	+
377		/**
378		* Runs all unit tests in the given test suite.
379		* Actual behavior influenced by jsr166.* system properties.
#	Line 259 | Line 385 | public class JSR166TestCase extends Test
385		System.setSecurityManager(new SecurityManager());
386		}
387		for (int i = 0; i < suiteRuns; i++) {
388	<	TestResult result = junit.textui.TestRunner.run(suite);
388	>	TestResult result = newPithyTestRunner().doRun(suite);
389		if (!result.wasSuccessful())
390		System.exit(1);
391		System.gc();
#	Line 343 | Line 469 | public class JSR166TestCase extends Test
469		AbstractQueuedLongSynchronizerTest.suite(),
470		ArrayBlockingQueueTest.suite(),
471		ArrayDequeTest.suite(),
472	+	ArrayListTest.suite(),
473		AtomicBooleanTest.suite(),
474		AtomicIntegerArrayTest.suite(),
475		AtomicIntegerFieldUpdaterTest.suite(),
#	Line 365 | Line 492 | public class JSR166TestCase extends Test
492		CopyOnWriteArrayListTest.suite(),
493		CopyOnWriteArraySetTest.suite(),
494		CountDownLatchTest.suite(),
495	+	CountedCompleterTest.suite(),
496		CyclicBarrierTest.suite(),
497		DelayQueueTest.suite(),
498		EntryTest.suite(),
#	Line 393 | Line 521 | public class JSR166TestCase extends Test
521		TreeMapTest.suite(),
522		TreeSetTest.suite(),
523		TreeSubMapTest.suite(),
524	<	TreeSubSetTest.suite());
524	>	TreeSubSetTest.suite(),
525	>	VectorTest.suite());
526
527		// Java8+ test classes
528		if (atLeastJava8()) {
529		String[] java8TestClassNames = {
530	+	"ArrayDeque8Test",
531		"Atomic8Test",
532		"CompletableFutureTest",
533		"ConcurrentHashMap8Test",
534	<	"CountedCompleterTest",
534	>	"CountedCompleter8Test",
535		"DoubleAccumulatorTest",
536		"DoubleAdderTest",
537		"ForkJoinPool8Test",
538		"ForkJoinTask8Test",
539	+	"LinkedBlockingDeque8Test",
540	+	"LinkedBlockingQueue8Test",
541		"LongAccumulatorTest",
542		"LongAdderTest",
543		"SplittableRandomTest",
544		"StampedLockTest",
545		"SubmissionPublisherTest",
546		"ThreadLocalRandom8Test",
547	+	"TimeUnit8Test",
548		};
549		addNamedTestClasses(suite, java8TestClassNames);
550		}
#	Line 419 | Line 552 | public class JSR166TestCase extends Test
552		// Java9+ test classes
553		if (atLeastJava9()) {
554		String[] java9TestClassNames = {
555	<	// Currently empty, but expecting varhandle tests
555	>	"AtomicBoolean9Test",
556	>	"AtomicInteger9Test",
557	>	"AtomicIntegerArray9Test",
558	>	"AtomicLong9Test",
559	>	"AtomicLongArray9Test",
560	>	"AtomicReference9Test",
561	>	"AtomicReferenceArray9Test",
562	>	"ExecutorCompletionService9Test",
563	>	"ForkJoinPool9Test",
564		};
565		addNamedTestClasses(suite, java9TestClassNames);
566		}
#	Line 430 | Line 571 | public class JSR166TestCase extends Test
571		/** Returns list of junit-style test method names in given class. */
572		public static ArrayList<String> testMethodNames(Class<?> testClass) {
573		Method[] methods = testClass.getDeclaredMethods();
574	<	ArrayList<String> names = new ArrayList<String>(methods.length);
574	>	ArrayList<String> names = new ArrayList<>(methods.length);
575		for (Method method : methods) {
576		if (method.getName().startsWith("test")
577		&& Modifier.isPublic(method.getModifiers())
#	Line 496 | Line 637 | public class JSR166TestCase extends Test
637		public static long LONG_DELAY_MS;
638
639		/**
640	<	* Returns the shortest timed delay. This could
641	<	* be reimplemented to use for example a Property.
640	>	* Returns the shortest timed delay. This can be scaled up for
641	>	* slow machines using the jsr166.delay.factor system property,
642	>	* or via jtreg's -timeoutFactor: flag.
643	>	* http://openjdk.java.net/jtreg/command-help.html
644		*/
645		protected long getShortDelay() {
646	<	return 50;
646	>	return (long) (50 * delayFactor);
647		}
648
649		/**
#	Line 534 | Line 677 | public class JSR166TestCase extends Test
677		* The first exception encountered if any threadAssertXXX method fails.
678		*/
679		private final AtomicReference<Throwable> threadFailure
680	<	= new AtomicReference<Throwable>(null);
680	>	= new AtomicReference<>(null);
681
682		/**
683		* Records an exception so that it can be rethrown later in the test
#	Line 813 | Line 956 | public class JSR166TestCase extends Test
956		}};
957		}
958
959	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
960	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
961	+	}
962	+
963	+	Runnable releaser(final AtomicBoolean flag) {
964	+	return new Runnable() { public void run() { flag.set(true); }};
965	+	}
966	+
967		/**
968		* Waits out termination of a thread pool or fails doing so.
969		*/
#	Line 836 | Line 987 | public class JSR166TestCase extends Test
987		}
988		}
989
990	<	/** Like Runnable, but with the freedom to throw anything */
990	>	/**
991	>	* Like Runnable, but with the freedom to throw anything.
992	>	* junit folks had the same idea:
993	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
994	>	*/
995		interface Action { public void run() throws Throwable; }
996
997		/**
#	Line 867 | Line 1022 | public class JSR166TestCase extends Test
1022		* Uninteresting threads are filtered out.
1023		*/
1024		static void dumpTestThreads() {
1025	+	SecurityManager sm = System.getSecurityManager();
1026	+	if (sm != null) {
1027	+	try {
1028	+	System.setSecurityManager(null);
1029	+	} catch (SecurityException giveUp) {
1030	+	return;
1031	+	}
1032	+	}
1033	+
1034		ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1035		System.err.println("------ stacktrace dump start ------");
1036		for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1037	<	String name = info.getThreadName();
1037	>	final String name = info.getThreadName();
1038	>	String lockName;
1039		if ("Signal Dispatcher".equals(name))
1040		continue;
1041		if ("Reference Handler".equals(name)
1042	<	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
1042	>	&& (lockName = info.getLockName()) != null
1043	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1044		continue;
1045		if ("Finalizer".equals(name)
1046	<	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
1046	>	&& (lockName = info.getLockName()) != null
1047	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1048		continue;
1049		if ("checkForWedgedTest".equals(name))
1050		continue;
1051		System.err.print(info);
1052		}
1053		System.err.println("------ stacktrace dump end ------");
1054	+
1055	+	if (sm != null) System.setSecurityManager(sm);
1056		}
1057
1058		/**
#	Line 1070 | Line 1239 | public class JSR166TestCase extends Test
1239		}
1240		public void refresh() {}
1241		public String toString() {
1242	<	List<Permission> ps = new ArrayList<Permission>();
1242	>	List<Permission> ps = new ArrayList<>();
1243		for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1244		ps.add(e.nextElement());
1245		return "AdjustablePolicy with permissions " + ps;
#	Line 1100 | Line 1269 | public class JSR166TestCase extends Test
1269		* Sleeps until the given time has elapsed.
1270		* Throws AssertionFailedError if interrupted.
1271		*/
1272	<	void sleep(long millis) {
1272	>	static void sleep(long millis) {
1273		try {
1274		delay(millis);
1275		} catch (InterruptedException fail) {
#	Line 1116 | Line 1285 | public class JSR166TestCase extends Test
1285		* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1286		*/
1287		void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1288	<	long startTime = System.nanoTime();
1288	>	long startTime = 0L;
1289		for (;;) {
1290		Thread.State s = thread.getState();
1291		if (s == Thread.State.BLOCKED ||
#	Line 1125 | Line 1294 | public class JSR166TestCase extends Test
1294		return;
1295		else if (s == Thread.State.TERMINATED)
1296		fail("Unexpected thread termination");
1297	+	else if (startTime == 0L)
1298	+	startTime = System.nanoTime();
1299		else if (millisElapsedSince(startTime) > timeoutMillis) {
1300		threadAssertTrue(thread.isAlive());
1301	<	return;
1301	>	fail("timed out waiting for thread to enter wait state");
1302	>	}
1303	>	Thread.yield();
1304	>	}
1305	>	}
1306	>
1307	>	/**
1308	>	* Spin-waits up to the specified number of milliseconds for the given
1309	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1310	>	* and additionally satisfy the given condition.
1311	>	*/
1312	>	void waitForThreadToEnterWaitState(
1313	>	Thread thread, long timeoutMillis, Callable<Boolean> waitingForGodot) {
1314	>	long startTime = 0L;
1315	>	for (;;) {
1316	>	Thread.State s = thread.getState();
1317	>	if (s == Thread.State.BLOCKED ||
1318	>	s == Thread.State.WAITING ||
1319	>	s == Thread.State.TIMED_WAITING) {
1320	>	try {
1321	>	if (waitingForGodot.call())
1322	>	return;
1323	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1324	>	}
1325	>	else if (s == Thread.State.TERMINATED)
1326	>	fail("Unexpected thread termination");
1327	>	else if (startTime == 0L)
1328	>	startTime = System.nanoTime();
1329	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1330	>	threadAssertTrue(thread.isAlive());
1331	>	fail("timed out waiting for thread to enter wait state");
1332		}
1333		Thread.yield();
1334		}
1335		}
1336
1337		/**
1338	<	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1339	<	* state: BLOCKED, WAITING, or TIMED_WAITING.
1338	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1339	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1340		*/
1341		void waitForThreadToEnterWaitState(Thread thread) {
1342		waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1343		}
1344
1345		/**
1346	+	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1347	+	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1348	+	* and additionally satisfy the given condition.
1349	+	*/
1350	+	void waitForThreadToEnterWaitState(
1351	+	Thread thread, Callable<Boolean> waitingForGodot) {
1352	+	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1353	+	}
1354	+
1355	+	/**
1356		* Returns the number of milliseconds since time given by
1357		* startNanoTime, which must have been previously returned from a
1358		* call to {@link System#nanoTime()}.
#	Line 1203 | Line 1414 | public class JSR166TestCase extends Test
1414		} finally {
1415		if (t.getState() != Thread.State.TERMINATED) {
1416		t.interrupt();
1417	<	threadFail("Test timed out");
1417	>	threadFail("timed out waiting for thread to terminate");
1418		}
1419		}
1420		}
#	Line 1369 | Line 1580 | public class JSR166TestCase extends Test
1580		return new LatchAwaiter(latch);
1581		}
1582
1583	<	public void await(CountDownLatch latch) {
1583	>	public void await(CountDownLatch latch, long timeoutMillis) {
1584		try {
1585	<	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1585	>	if (!latch.await(timeoutMillis, MILLISECONDS))
1586	>	fail("timed out waiting for CountDownLatch for "
1587	>	+ (timeoutMillis/1000) + " sec");
1588		} catch (Throwable fail) {
1589		threadUnexpectedException(fail);
1590		}
1591		}
1592
1593	+	public void await(CountDownLatch latch) {
1594	+	await(latch, LONG_DELAY_MS);
1595	+	}
1596	+
1597		public void await(Semaphore semaphore) {
1598		try {
1599	<	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1599	>	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1600	>	fail("timed out waiting for Semaphore for "
1601	>	+ (LONG_DELAY_MS/1000) + " sec");
1602		} catch (Throwable fail) {
1603		threadUnexpectedException(fail);
1604		}
#	Line 1609 | Line 1828 | public class JSR166TestCase extends Test
1828		* A CyclicBarrier that uses timed await and fails with
1829		* AssertionFailedErrors instead of throwing checked exceptions.
1830		*/
1831	<	public class CheckedBarrier extends CyclicBarrier {
1831	>	public static class CheckedBarrier extends CyclicBarrier {
1832		public CheckedBarrier(int parties) { super(parties); }
1833
1834		public int await() {
#	Line 1673 | Line 1892 | public class JSR166TestCase extends Test
1892		}
1893		}
1894
1895	+	void assertImmutable(final Object o) {
1896	+	if (o instanceof Collection) {
1897	+	assertThrows(
1898	+	UnsupportedOperationException.class,
1899	+	new Runnable() { public void run() {
1900	+	((Collection) o).add(null);}});
1901	+	}
1902	+	}
1903	+
1904		@SuppressWarnings("unchecked")
1905		<T> T serialClone(T o) {
1906		try {
1907		ObjectInputStream ois = new ObjectInputStream
1908		(new ByteArrayInputStream(serialBytes(o)));
1909		T clone = (T) ois.readObject();
1910	+	if (o == clone) assertImmutable(o);
1911		assertSame(o.getClass(), clone.getClass());
1912		return clone;
1913		} catch (Throwable fail) {
#	Line 1687 | Line 1916 | public class JSR166TestCase extends Test
1916		}
1917		}
1918
1919	+	/**
1920	+	* A version of serialClone that leaves error handling (for
1921	+	* e.g. NotSerializableException) up to the caller.
1922	+	*/
1923	+	@SuppressWarnings("unchecked")
1924	+	<T> T serialClonePossiblyFailing(T o)
1925	+	throws ReflectiveOperationException, java.io.IOException {
1926	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1927	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1928	+	oos.writeObject(o);
1929	+	oos.flush();
1930	+	oos.close();
1931	+	ObjectInputStream ois = new ObjectInputStream
1932	+	(new ByteArrayInputStream(bos.toByteArray()));
1933	+	T clone = (T) ois.readObject();
1934	+	if (o == clone) assertImmutable(o);
1935	+	assertSame(o.getClass(), clone.getClass());
1936	+	return clone;
1937	+	}
1938	+
1939	+	/**
1940	+	* If o implements Cloneable and has a public clone method,
1941	+	* returns a clone of o, else null.
1942	+	*/
1943	+	@SuppressWarnings("unchecked")
1944	+	<T> T cloneableClone(T o) {
1945	+	if (!(o instanceof Cloneable)) return null;
1946	+	final T clone;
1947	+	try {
1948	+	clone = (T) o.getClass().getMethod("clone").invoke(o);
1949	+	} catch (NoSuchMethodException ok) {
1950	+	return null;
1951	+	} catch (ReflectiveOperationException unexpected) {
1952	+	throw new Error(unexpected);
1953	+	}
1954	+	assertNotSame(o, clone); // not 100% guaranteed by spec
1955	+	assertSame(o.getClass(), clone.getClass());
1956	+	return clone;
1957	+	}
1958	+
1959		public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1960		Runnable... throwingActions) {
1961		for (Runnable throwingAction : throwingActions) {
#	Line 1715 | Line 1984 | public class JSR166TestCase extends Test
1984		} catch (NoSuchElementException success) {}
1985		assertFalse(it.hasNext());
1986		}
1987	+
1988	+	public <T> Callable<T> callableThrowing(final Exception ex) {
1989	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1990	+	}
1991	+
1992	+	public Runnable runnableThrowing(final RuntimeException ex) {
1993	+	return new Runnable() { public void run() { throw ex; }};
1994	+	}
1995	+
1996	+	/** A reusable thread pool to be shared by tests. */
1997	+	static final ExecutorService cachedThreadPool =
1998	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1999	+	1000L, MILLISECONDS,
2000	+	new SynchronousQueue<Runnable>());
2001	+
2002	+	static <T> void shuffle(T[] array) {
2003	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
2004	+	}
2005		}

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