ViewVC Help

View File | Revision Log | Show Annotations | Download File | Root Listing

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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.159 by jsr166, Sun Oct 4 00:30:50 2015 UTC vs.
Revision 1.212 by jsr166, Fri Dec 9 04:24:07 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.base/java.util.concurrent:open
13	+	*          java.management
14	+	* @build *
15	+	* @run junit/othervm/timeout=1000 -Djsr166.testImplementationDetails=true JSR166TestCase
16	+	* @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=0 -Djsr166.testImplementationDetails=true JSR166TestCase
17	+	* @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=1 -Djava.util.secureRandomSeed=true JSR166TestCase
18	+	*/
19	+
20		import static java.util.concurrent.TimeUnit.MILLISECONDS;
21		import static java.util.concurrent.TimeUnit.MINUTES;
22		import static java.util.concurrent.TimeUnit.NANOSECONDS;
#	Line 20 | Line 31 | import java.lang.management.ThreadMXBean
31		import java.lang.reflect.Constructor;
32		import java.lang.reflect.Method;
33		import java.lang.reflect.Modifier;
34	+	import java.nio.file.Files;
35	+	import java.nio.file.Paths;
36		import java.security.CodeSource;
37		import java.security.Permission;
38		import java.security.PermissionCollection;
#	Line 29 | Line 42 | import java.security.ProtectionDomain;
42		import java.security.SecurityPermission;
43		import java.util.ArrayList;
44		import java.util.Arrays;
45	+	import java.util.Collection;
46	+	import java.util.Collections;
47		import java.util.Date;
48		import java.util.Enumeration;
49		import java.util.Iterator;
#	Line 48 | Line 63 | import java.util.concurrent.RecursiveAct
63		import java.util.concurrent.RecursiveTask;
64		import java.util.concurrent.RejectedExecutionHandler;
65		import java.util.concurrent.Semaphore;
66	+	import java.util.concurrent.SynchronousQueue;
67		import java.util.concurrent.ThreadFactory;
68	+	import java.util.concurrent.ThreadLocalRandom;
69		import java.util.concurrent.ThreadPoolExecutor;
70		import java.util.concurrent.TimeoutException;
71	+	import java.util.concurrent.atomic.AtomicBoolean;
72		import java.util.concurrent.atomic.AtomicReference;
73	+	import java.util.regex.Matcher;
74		import java.util.regex.Pattern;
75
76		import junit.framework.AssertionFailedError;
#	Line 109 | Line 128 | import junit.framework.TestSuite;
128		* methods as there are exceptions the method can throw. Sometimes
129		* there are multiple tests per JSR166 method when the different
130		* "normal" behaviors differ significantly. And sometimes testcases
131	<	* cover multiple methods when they cannot be tested in
113	<	* isolation.
131	>	* cover multiple methods when they cannot be tested in isolation.
132		*
133		* <li>The documentation style for testcases is to provide as javadoc
134		* a simple sentence or two describing the property that the testcase
#	Line 173 | Line 191 | public class JSR166TestCase extends Test
191		private static final int suiteRuns =
192		Integer.getInteger("jsr166.suiteRuns", 1);
193
194	+	/**
195	+	* Returns the value of the system property, or NaN if not defined.
196	+	*/
197	+	private static float systemPropertyValue(String name) {
198	+	String floatString = System.getProperty(name);
199	+	if (floatString == null)
200	+	return Float.NaN;
201	+	try {
202	+	return Float.parseFloat(floatString);
203	+	} catch (NumberFormatException ex) {
204	+	throw new IllegalArgumentException(
205	+	String.format("Bad float value in system property %s=%s",
206	+	name, floatString));
207	+	}
208	+	}
209	+
210	+	/**
211	+	* The scaling factor to apply to standard delays used in tests.
212	+	* May be initialized from any of:
213	+	* - the "jsr166.delay.factor" system property
214	+	* - the "test.timeout.factor" system property (as used by jtreg)
215	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
216	+	* - hard-coded fuzz factor when using a known slowpoke VM
217	+	*/
218	+	private static final float delayFactor = delayFactor();
219	+
220	+	private static float delayFactor() {
221	+	float x;
222	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
223	+	return x;
224	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
225	+	return x;
226	+	String prop = System.getProperty("java.vm.version");
227	+	if (prop != null && prop.matches(".*debug.*"))
228	+	return 4.0f; // How much slower is fastdebug than product?!
229	+	return 1.0f;
230	+	}
231	+
232		public JSR166TestCase() { super(); }
233		public JSR166TestCase(String name) { super(name); }
234
#	Line 188 | Line 244 | public class JSR166TestCase extends Test
244		return (regex == null) ? null : Pattern.compile(regex);
245		}
246
247	+	// Instrumentation to debug very rare, but very annoying hung test runs.
248		static volatile TestCase currentTestCase;
249	+	// static volatile int currentRun = 0;
250		static {
251		Runnable checkForWedgedTest = new Runnable() { public void run() {
252	<	// avoid spurious reports with enormous runsPerTest
253	<	final int timeoutMinutes = Math.max(runsPerTest / 10, 1);
252	>	// Avoid spurious reports with enormous runsPerTest.
253	>	// A single test case run should never take more than 1 second.
254	>	// But let's cap it at the high end too ...
255	>	final int timeoutMinutes =
256	>	Math.min(15, Math.max(runsPerTest / 60, 1));
257		for (TestCase lastTestCase = currentTestCase;;) {
258		try { MINUTES.sleep(timeoutMinutes); }
259		catch (InterruptedException unexpected) { break; }
260		if (lastTestCase == currentTestCase) {
261	<	System.err.println
262	<	("Looks like we're stuck running test: "
263	<	+ lastTestCase);
261	>	System.err.printf(
262	>	"Looks like we're stuck running test: %s%n",
263	>	lastTestCase);
264	>	//                     System.err.printf(
265	>	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
266	>	//                         lastTestCase, currentRun, runsPerTest);
267	>	//                     System.err.println("availableProcessors=" +
268	>	//                         Runtime.getRuntime().availableProcessors());
269	>	//                     System.err.printf("cpu model = %s%n", cpuModel());
270		dumpTestThreads();
271	+	// one stack dump is probably enough; more would be spam
272	+	break;
273		}
274		lastTestCase = currentTestCase;
275		}}};
#	Line 209 | Line 278 | public class JSR166TestCase extends Test
278		thread.start();
279		}
280
281	+	//     public static String cpuModel() {
282	+	//         try {
283	+	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
284	+	//                 .matcher(new String(
285	+	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
286	+	//             matcher.find();
287	+	//             return matcher.group(1);
288	+	//         } catch (Exception ex) { return null; }
289	+	//     }
290	+
291		public void runBare() throws Throwable {
292		currentTestCase = this;
293		if (methodFilter == null
#	Line 218 | Line 297 | public class JSR166TestCase extends Test
297
298		protected void runTest() throws Throwable {
299		for (int i = 0; i < runsPerTest; i++) {
300	+	// currentRun = i;
301		if (profileTests)
302		runTestProfiled();
303		else
#	Line 246 | Line 326 | public class JSR166TestCase extends Test
326		main(suite(), args);
327		}
328
329	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
330	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
331	+	long runTime;
332	+	public void startTest(Test test) {}
333	+	protected void printHeader(long runTime) {
334	+	this.runTime = runTime; // defer printing for later
335	+	}
336	+	protected void printFooter(TestResult result) {
337	+	if (result.wasSuccessful()) {
338	+	getWriter().println("OK (" + result.runCount() + " tests)"
339	+	+ "  Time: " + elapsedTimeAsString(runTime));
340	+	} else {
341	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
342	+	super.printFooter(result);
343	+	}
344	+	}
345	+	}
346	+
347	+	/**
348	+	* Returns a TestRunner that doesn't bother with unnecessary
349	+	* fluff, like printing a "." for each test case.
350	+	*/
351	+	static junit.textui.TestRunner newPithyTestRunner() {
352	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
353	+	runner.setPrinter(new PithyResultPrinter(System.out));
354	+	return runner;
355	+	}
356	+
357		/**
358		* Runs all unit tests in the given test suite.
359		* Actual behavior influenced by jsr166.* system properties.
#	Line 257 | Line 365 | public class JSR166TestCase extends Test
365		System.setSecurityManager(new SecurityManager());
366		}
367		for (int i = 0; i < suiteRuns; i++) {
368	<	TestResult result = junit.textui.TestRunner.run(suite);
368	>	TestResult result = newPithyTestRunner().doRun(suite);
369		if (!result.wasSuccessful())
370		System.exit(1);
371		System.gc();
#	Line 341 | Line 449 | public class JSR166TestCase extends Test
449		AbstractQueuedLongSynchronizerTest.suite(),
450		ArrayBlockingQueueTest.suite(),
451		ArrayDequeTest.suite(),
452	+	ArrayListTest.suite(),
453		AtomicBooleanTest.suite(),
454		AtomicIntegerArrayTest.suite(),
455		AtomicIntegerFieldUpdaterTest.suite(),
#	Line 363 | Line 472 | public class JSR166TestCase extends Test
472		CopyOnWriteArrayListTest.suite(),
473		CopyOnWriteArraySetTest.suite(),
474		CountDownLatchTest.suite(),
475	+	CountedCompleterTest.suite(),
476		CyclicBarrierTest.suite(),
477		DelayQueueTest.suite(),
478		EntryTest.suite(),
#	Line 391 | Line 501 | public class JSR166TestCase extends Test
501		TreeMapTest.suite(),
502		TreeSetTest.suite(),
503		TreeSubMapTest.suite(),
504	<	TreeSubSetTest.suite());
504	>	TreeSubSetTest.suite(),
505	>	VectorTest.suite());
506
507		// Java8+ test classes
508		if (atLeastJava8()) {
509		String[] java8TestClassNames = {
510	+	"ArrayDeque8Test",
511		"Atomic8Test",
512		"CompletableFutureTest",
513		"ConcurrentHashMap8Test",
514	<	"CountedCompleterTest",
514	>	"CountedCompleter8Test",
515		"DoubleAccumulatorTest",
516		"DoubleAdderTest",
517		"ForkJoinPool8Test",
#	Line 410 | Line 522 | public class JSR166TestCase extends Test
522		"StampedLockTest",
523		"SubmissionPublisherTest",
524		"ThreadLocalRandom8Test",
525	+	"TimeUnit8Test",
526		};
527		addNamedTestClasses(suite, java8TestClassNames);
528		}
#	Line 417 | Line 530 | public class JSR166TestCase extends Test
530		// Java9+ test classes
531		if (atLeastJava9()) {
532		String[] java9TestClassNames = {
533	<	// Currently empty, but expecting varhandle tests
533	>	"AtomicBoolean9Test",
534	>	"AtomicInteger9Test",
535	>	"AtomicIntegerArray9Test",
536	>	"AtomicLong9Test",
537	>	"AtomicLongArray9Test",
538	>	"AtomicReference9Test",
539	>	"AtomicReferenceArray9Test",
540	>	"ExecutorCompletionService9Test",
541		};
542		addNamedTestClasses(suite, java9TestClassNames);
543		}
#	Line 494 | Line 614 | public class JSR166TestCase extends Test
614		public static long LONG_DELAY_MS;
615
616		/**
617	<	* Returns the shortest timed delay. This could
618	<	* be reimplemented to use for example a Property.
617	>	* Returns the shortest timed delay. This can be scaled up for
618	>	* slow machines using the jsr166.delay.factor system property,
619	>	* or via jtreg's -timeoutFactor: flag.
620	>	* http://openjdk.java.net/jtreg/command-help.html
621		*/
622		protected long getShortDelay() {
623	<	return 50;
623	>	return (long) (50 * delayFactor);
624		}
625
626		/**
#	Line 590 | Line 712 | public class JSR166TestCase extends Test
712		}
713
714		/**
715	<	* Finds missing try { ... } finally { joinPool(e); }
715	>	* Finds missing PoolCleaners
716		*/
717		void checkForkJoinPoolThreadLeaks() throws InterruptedException {
718		Thread[] survivors = new Thread[7];
#	Line 749 | Line 871 | public class JSR166TestCase extends Test
871		/**
872		* Delays, via Thread.sleep, for the given millisecond delay, but
873		* if the sleep is shorter than specified, may re-sleep or yield
874	<	* until time elapses.
874	>	* until time elapses.  Ensures that the given time, as measured
875	>	* by System.nanoTime(), has elapsed.
876		*/
877		static void delay(long millis) throws InterruptedException {
878	<	long startTime = System.nanoTime();
879	<	long ns = millis * 1000 * 1000;
880	<	for (;;) {
878	>	long nanos = millis * (1000 * 1000);
879	>	final long wakeupTime = System.nanoTime() + nanos;
880	>	do {
881		if (millis > 0L)
882		Thread.sleep(millis);
883		else // too short to sleep
884		Thread.yield();
885	<	long d = ns - (System.nanoTime() - startTime);
886	<	if (d > 0L)
887	<	millis = d / (1000 * 1000);
765	<	else
766	<	break;
767	<	}
885	>	nanos = wakeupTime - System.nanoTime();
886	>	millis = nanos / (1000 * 1000);
887	>	} while (nanos >= 0L);
888		}
889
890		/**
891		* Allows use of try-with-resources with per-test thread pools.
892		*/
893	<	class PoolCleaner<T extends ExecutorService>
894	<	implements AutoCloseable {
895	<	public final T pool;
776	<	public PoolCleaner(T pool) { this.pool = pool; }
893	>	class PoolCleaner implements AutoCloseable {
894	>	private final ExecutorService pool;
895	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
896		public void close() { joinPool(pool); }
897		}
898
899	<	<T extends ExecutorService> PoolCleaner<T> cleaner(T pool) {
900	<	return new PoolCleaner<T>(pool);
899	>	/**
900	>	* An extension of PoolCleaner that has an action to release the pool.
901	>	*/
902	>	class PoolCleanerWithReleaser extends PoolCleaner {
903	>	private final Runnable releaser;
904	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
905	>	super(pool);
906	>	this.releaser = releaser;
907	>	}
908	>	public void close() {
909	>	try {
910	>	releaser.run();
911	>	} finally {
912	>	super.close();
913	>	}
914	>	}
915	>	}
916	>
917	>	PoolCleaner cleaner(ExecutorService pool) {
918	>	return new PoolCleaner(pool);
919	>	}
920	>
921	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
922	>	return new PoolCleanerWithReleaser(pool, releaser);
923	>	}
924	>
925	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
926	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
927	>	}
928	>
929	>	Runnable releaser(final CountDownLatch latch) {
930	>	return new Runnable() { public void run() {
931	>	do { latch.countDown(); }
932	>	while (latch.getCount() > 0);
933	>	}};
934	>	}
935	>
936	>	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
937	>	return new PoolCleanerWithReleaser(pool, releaser(flag));
938	>	}
939	>
940	>	Runnable releaser(final AtomicBoolean flag) {
941	>	return new Runnable() { public void run() { flag.set(true); }};
942		}
943
944		/**
#	Line 794 | Line 954 | public class JSR166TestCase extends Test
954		} finally {
955		// last resort, for the benefit of subsequent tests
956		pool.shutdownNow();
957	<	pool.awaitTermination(SMALL_DELAY_MS, MILLISECONDS);
957	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
958		}
959		}
960		} catch (SecurityException ok) {
#	Line 804 | Line 964 | public class JSR166TestCase extends Test
964		}
965		}
966
967	<	/** Like Runnable, but with the freedom to throw anything */
967	>	/**
968	>	* Like Runnable, but with the freedom to throw anything.
969	>	* junit folks had the same idea:
970	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
971	>	*/
972		interface Action { public void run() throws Throwable; }
973
974		/**
#	Line 813 | Line 977 | public class JSR166TestCase extends Test
977		* necessarily individually slow because they must block.
978		*/
979		void testInParallel(Action ... actions) {
980	<	try (PoolCleaner<ExecutorService> cleaner
981	<	= cleaner(Executors.newCachedThreadPool())) {
818	<	ExecutorService pool = cleaner.pool;
980	>	ExecutorService pool = Executors.newCachedThreadPool();
981	>	try (PoolCleaner cleaner = cleaner(pool)) {
982		ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
983		for (final Action action : actions)
984		futures.add(pool.submit(new CheckedRunnable() {
#	Line 836 | Line 999 | public class JSR166TestCase extends Test
999		* Uninteresting threads are filtered out.
1000		*/
1001		static void dumpTestThreads() {
1002	+	SecurityManager sm = System.getSecurityManager();
1003	+	if (sm != null) {
1004	+	try {
1005	+	System.setSecurityManager(null);
1006	+	} catch (SecurityException giveUp) {
1007	+	return;
1008	+	}
1009	+	}
1010	+
1011		ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1012		System.err.println("------ stacktrace dump start ------");
1013		for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1014	<	String name = info.getThreadName();
1014	>	final String name = info.getThreadName();
1015	>	String lockName;
1016		if ("Signal Dispatcher".equals(name))
1017		continue;
1018		if ("Reference Handler".equals(name)
1019	<	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
1019	>	&& (lockName = info.getLockName()) != null
1020	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1021		continue;
1022		if ("Finalizer".equals(name)
1023	<	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
1023	>	&& (lockName = info.getLockName()) != null
1024	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1025		continue;
1026		if ("checkForWedgedTest".equals(name))
1027		continue;
1028		System.err.print(info);
1029		}
1030		System.err.println("------ stacktrace dump end ------");
1031	+
1032	+	if (sm != null) System.setSecurityManager(sm);
1033		}
1034
1035		/**
#	Line 1069 | Line 1246 | public class JSR166TestCase extends Test
1246		* Sleeps until the given time has elapsed.
1247		* Throws AssertionFailedError if interrupted.
1248		*/
1249	<	void sleep(long millis) {
1249	>	static void sleep(long millis) {
1250		try {
1251		delay(millis);
1252		} catch (InterruptedException fail) {
#	Line 1085 | Line 1262 | public class JSR166TestCase extends Test
1262		* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1263		*/
1264		void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1265	<	long startTime = System.nanoTime();
1265	>	long startTime = 0L;
1266		for (;;) {
1267		Thread.State s = thread.getState();
1268		if (s == Thread.State.BLOCKED ||
#	Line 1094 | Line 1271 | public class JSR166TestCase extends Test
1271		return;
1272		else if (s == Thread.State.TERMINATED)
1273		fail("Unexpected thread termination");
1274	+	else if (startTime == 0L)
1275	+	startTime = System.nanoTime();
1276		else if (millisElapsedSince(startTime) > timeoutMillis) {
1277		threadAssertTrue(thread.isAlive());
1278		return;
#	Line 1172 | Line 1351 | public class JSR166TestCase extends Test
1351		} finally {
1352		if (t.getState() != Thread.State.TERMINATED) {
1353		t.interrupt();
1354	<	fail("Test timed out");
1354	>	threadFail("timed out waiting for thread to terminate");
1355		}
1356		}
1357		}
#	Line 1320 | Line 1499 | public class JSR166TestCase extends Test
1499		}};
1500		}
1501
1502	<	public Runnable awaiter(final CountDownLatch latch) {
1503	<	return new CheckedRunnable() {
1504	<	public void realRun() throws InterruptedException {
1505	<	await(latch);
1506	<	}};
1502	>	class LatchAwaiter extends CheckedRunnable {
1503	>	static final int NEW = 0;
1504	>	static final int RUNNING = 1;
1505	>	static final int DONE = 2;
1506	>	final CountDownLatch latch;
1507	>	int state = NEW;
1508	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1509	>	public void realRun() throws InterruptedException {
1510	>	state = 1;
1511	>	await(latch);
1512	>	state = 2;
1513	>	}
1514		}
1515
1516	<	public void await(CountDownLatch latch) {
1516	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1517	>	return new LatchAwaiter(latch);
1518	>	}
1519	>
1520	>	public void await(CountDownLatch latch, long timeoutMillis) {
1521		try {
1522	<	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1522	>	if (!latch.await(timeoutMillis, MILLISECONDS))
1523	>	fail("timed out waiting for CountDownLatch for "
1524	>	+ (timeoutMillis/1000) + " sec");
1525		} catch (Throwable fail) {
1526		threadUnexpectedException(fail);
1527		}
1528		}
1529
1530	+	public void await(CountDownLatch latch) {
1531	+	await(latch, LONG_DELAY_MS);
1532	+	}
1533	+
1534		public void await(Semaphore semaphore) {
1535		try {
1536	<	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1536	>	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1537	>	fail("timed out waiting for Semaphore for "
1538	>	+ (LONG_DELAY_MS/1000) + " sec");
1539		} catch (Throwable fail) {
1540		threadUnexpectedException(fail);
1541		}
#	Line 1567 | Line 1765 | public class JSR166TestCase extends Test
1765		* A CyclicBarrier that uses timed await and fails with
1766		* AssertionFailedErrors instead of throwing checked exceptions.
1767		*/
1768	<	public class CheckedBarrier extends CyclicBarrier {
1768	>	public static class CheckedBarrier extends CyclicBarrier {
1769		public CheckedBarrier(int parties) { super(parties); }
1770
1771		public int await() {
#	Line 1631 | Line 1829 | public class JSR166TestCase extends Test
1829		}
1830		}
1831
1832	+	void assertImmutable(final Object o) {
1833	+	if (o instanceof Collection) {
1834	+	assertThrows(
1835	+	UnsupportedOperationException.class,
1836	+	new Runnable() { public void run() {
1837	+	((Collection) o).add(null);}});
1838	+	}
1839	+	}
1840	+
1841		@SuppressWarnings("unchecked")
1842		<T> T serialClone(T o) {
1843		try {
1844		ObjectInputStream ois = new ObjectInputStream
1845		(new ByteArrayInputStream(serialBytes(o)));
1846		T clone = (T) ois.readObject();
1847	+	if (o == clone) assertImmutable(o);
1848		assertSame(o.getClass(), clone.getClass());
1849		return clone;
1850		} catch (Throwable fail) {
#	Line 1645 | Line 1853 | public class JSR166TestCase extends Test
1853		}
1854		}
1855
1856	+	/**
1857	+	* A version of serialClone that leaves error handling (for
1858	+	* e.g. NotSerializableException) up to the caller.
1859	+	*/
1860	+	@SuppressWarnings("unchecked")
1861	+	<T> T serialClonePossiblyFailing(T o)
1862	+	throws ReflectiveOperationException, java.io.IOException {
1863	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1864	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1865	+	oos.writeObject(o);
1866	+	oos.flush();
1867	+	oos.close();
1868	+	ObjectInputStream ois = new ObjectInputStream
1869	+	(new ByteArrayInputStream(bos.toByteArray()));
1870	+	T clone = (T) ois.readObject();
1871	+	if (o == clone) assertImmutable(o);
1872	+	assertSame(o.getClass(), clone.getClass());
1873	+	return clone;
1874	+	}
1875	+
1876	+	/**
1877	+	* If o implements Cloneable and has a public clone method,
1878	+	* returns a clone of o, else null.
1879	+	*/
1880	+	@SuppressWarnings("unchecked")
1881	+	<T> T cloneableClone(T o) {
1882	+	if (!(o instanceof Cloneable)) return null;
1883	+	final T clone;
1884	+	try {
1885	+	clone = (T) o.getClass().getMethod("clone").invoke(o);
1886	+	} catch (NoSuchMethodException ok) {
1887	+	return null;
1888	+	} catch (ReflectiveOperationException unexpected) {
1889	+	throw new Error(unexpected);
1890	+	}
1891	+	assertNotSame(o, clone); // not 100% guaranteed by spec
1892	+	assertSame(o.getClass(), clone.getClass());
1893	+	return clone;
1894	+	}
1895	+
1896		public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1897		Runnable... throwingActions) {
1898		for (Runnable throwingAction : throwingActions) {
#	Line 1673 | Line 1921 | public class JSR166TestCase extends Test
1921		} catch (NoSuchElementException success) {}
1922		assertFalse(it.hasNext());
1923		}
1924	+
1925	+	public <T> Callable<T> callableThrowing(final Exception ex) {
1926	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1927	+	}
1928	+
1929	+	public Runnable runnableThrowing(final RuntimeException ex) {
1930	+	return new Runnable() { public void run() { throw ex; }};
1931	+	}
1932	+
1933	+	/** A reusable thread pool to be shared by tests. */
1934	+	static final ExecutorService cachedThreadPool =
1935	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1936	+	1000L, MILLISECONDS,
1937	+	new SynchronousQueue<Runnable>());
1938	+
1939	+	static <T> void shuffle(T[] array) {
1940	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1941	+	}
1942		}

Diff Legend

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