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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.63 by jsr166, Mon Oct 11 08:30:01 2010 UTC vs.
Revision 1.158 by jsr166, Sat Oct 3 23:17:03 2015 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
8
9	–	import junit.framework.*;
10	–	import java.util.PropertyPermission;
11	–	import java.util.concurrent.*;
12	–	import java.util.concurrent.atomic.AtomicReference;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	+	import static java.util.concurrent.TimeUnit.MINUTES;
11	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
12	+
13	+	import java.io.ByteArrayInputStream;
14	+	import java.io.ByteArrayOutputStream;
15	+	import java.io.ObjectInputStream;
16	+	import java.io.ObjectOutputStream;
17	+	import java.lang.management.ManagementFactory;
18	+	import java.lang.management.ThreadInfo;
19	+	import java.lang.management.ThreadMXBean;
20	+	import java.lang.reflect.Constructor;
21	+	import java.lang.reflect.Method;
22	+	import java.lang.reflect.Modifier;
23		import java.security.CodeSource;
24		import java.security.Permission;
25		import java.security.PermissionCollection;
#	Line 18 | Line 27 | import java.security.Permissions;
27		import java.security.Policy;
28		import java.security.ProtectionDomain;
29		import java.security.SecurityPermission;
30	+	import java.util.ArrayList;
31	+	import java.util.Arrays;
32	+	import java.util.Date;
33	+	import java.util.Enumeration;
34	+	import java.util.Iterator;
35	+	import java.util.List;
36	+	import java.util.NoSuchElementException;
37	+	import java.util.PropertyPermission;
38	+	import java.util.concurrent.BlockingQueue;
39	+	import java.util.concurrent.Callable;
40	+	import java.util.concurrent.CountDownLatch;
41	+	import java.util.concurrent.CyclicBarrier;
42	+	import java.util.concurrent.ExecutionException;
43	+	import java.util.concurrent.Executors;
44	+	import java.util.concurrent.ExecutorService;
45	+	import java.util.concurrent.ForkJoinPool;
46	+	import java.util.concurrent.Future;
47	+	import java.util.concurrent.RecursiveAction;
48	+	import java.util.concurrent.RecursiveTask;
49	+	import java.util.concurrent.RejectedExecutionHandler;
50	+	import java.util.concurrent.Semaphore;
51	+	import java.util.concurrent.ThreadFactory;
52	+	import java.util.concurrent.ThreadPoolExecutor;
53	+	import java.util.concurrent.TimeoutException;
54	+	import java.util.concurrent.atomic.AtomicReference;
55	+	import java.util.regex.Pattern;
56	+
57	+	import junit.framework.AssertionFailedError;
58	+	import junit.framework.Test;
59	+	import junit.framework.TestCase;
60	+	import junit.framework.TestResult;
61	+	import junit.framework.TestSuite;
62
63		/**
64		* Base class for JSR166 Junit TCK tests.  Defines some constants,
#	Line 29 | Line 70 | import java.security.SecurityPermission;
70		*
71		* <ol>
72		*
73	<	* <li> All assertions in code running in generated threads must use
73	>	* <li>All assertions in code running in generated threads must use
74		* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
75		* #threadAssertEquals}, or {@link #threadAssertNull}, (not
76		* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
77		* particularly recommended) for other code to use these forms too.
78		* Only the most typically used JUnit assertion methods are defined
79	<	* this way, but enough to live with.</li>
79	>	* this way, but enough to live with.
80		*
81	<	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
81	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
82		* to invoke {@code super.setUp} and {@code super.tearDown} within
83		* them. These methods are used to clear and check for thread
84	<	* assertion failures.</li>
84	>	* assertion failures.
85		*
86		* <li>All delays and timeouts must use one of the constants {@code
87		* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
#	Line 51 | Line 92 | import java.security.SecurityPermission;
92		* is always discriminable as larger than SHORT and smaller than
93		* MEDIUM.  And so on. These constants are set to conservative values,
94		* but even so, if there is ever any doubt, they can all be increased
95	<	* in one spot to rerun tests on slower platforms.</li>
95	>	* in one spot to rerun tests on slower platforms.
96		*
97	<	* <li> All threads generated must be joined inside each test case
97	>	* <li>All threads generated must be joined inside each test case
98		* method (or {@code fail} to do so) before returning from the
99		* method. The {@code joinPool} method can be used to do this when
100	<	* using Executors.</li>
100	>	* using Executors.
101		*
102		* </ol>
103		*
104	<	* <p> <b>Other notes</b>
104	>	* <p><b>Other notes</b>
105		* <ul>
106		*
107	<	* <li> Usually, there is one testcase method per JSR166 method
107	>	* <li>Usually, there is one testcase method per JSR166 method
108		* covering "normal" operation, and then as many exception-testing
109		* methods as there are exceptions the method can throw. Sometimes
110		* there are multiple tests per JSR166 method when the different
111		* "normal" behaviors differ significantly. And sometimes testcases
112		* cover multiple methods when they cannot be tested in
113	<	* isolation.</li>
113	>	* isolation.
114		*
115	<	* <li> The documentation style for testcases is to provide as javadoc
115	>	* <li>The documentation style for testcases is to provide as javadoc
116		* a simple sentence or two describing the property that the testcase
117		* method purports to test. The javadocs do not say anything about how
118	<	* the property is tested. To find out, read the code.</li>
118	>	* the property is tested. To find out, read the code.
119		*
120	<	* <li> These tests are "conformance tests", and do not attempt to
120	>	* <li>These tests are "conformance tests", and do not attempt to
121		* test throughput, latency, scalability or other performance factors
122		* (see the separate "jtreg" tests for a set intended to check these
123		* for the most central aspects of functionality.) So, most tests use
124		* the smallest sensible numbers of threads, collection sizes, etc
125	<	* needed to check basic conformance.</li>
125	>	* needed to check basic conformance.
126		*
127		* <li>The test classes currently do not declare inclusion in
128		* any particular package to simplify things for people integrating
129	<	* them in TCK test suites.</li>
129	>	* them in TCK test suites.
130		*
131	<	* <li> As a convenience, the {@code main} of this class (JSR166TestCase)
132	<	* runs all JSR166 unit tests.</li>
131	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
132	>	* runs all JSR166 unit tests.
133		*
134		* </ul>
135		*/
#	Line 100 | Line 141 | public class JSR166TestCase extends Test
141		Boolean.getBoolean("jsr166.expensiveTests");
142
143		/**
144	+	* If true, also run tests that are not part of the official tck
145	+	* because they test unspecified implementation details.
146	+	*/
147	+	protected static final boolean testImplementationDetails =
148	+	Boolean.getBoolean("jsr166.testImplementationDetails");
149	+
150	+	/**
151		* If true, report on stdout all "slow" tests, that is, ones that
152		* take more than profileThreshold milliseconds to execute.
153		*/
#	Line 113 | Line 161 | public class JSR166TestCase extends Test
161		private static final long profileThreshold =
162		Long.getLong("jsr166.profileThreshold", 100);
163
164	+	/**
165	+	* The number of repetitions per test (for tickling rare bugs).
166	+	*/
167	+	private static final int runsPerTest =
168	+	Integer.getInteger("jsr166.runsPerTest", 1);
169	+
170	+	/**
171	+	* The number of repetitions of the test suite (for finding leaks?).
172	+	*/
173	+	private static final int suiteRuns =
174	+	Integer.getInteger("jsr166.suiteRuns", 1);
175	+
176	+	public JSR166TestCase() { super(); }
177	+	public JSR166TestCase(String name) { super(name); }
178	+
179	+	/**
180	+	* A filter for tests to run, matching strings of the form
181	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
182	+	* Usefully combined with jsr166.runsPerTest.
183	+	*/
184	+	private static final Pattern methodFilter = methodFilter();
185	+
186	+	private static Pattern methodFilter() {
187	+	String regex = System.getProperty("jsr166.methodFilter");
188	+	return (regex == null) ? null : Pattern.compile(regex);
189	+	}
190	+
191	+	static volatile TestCase currentTestCase;
192	+	static {
193	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
194	+	// avoid spurious reports with enormous runsPerTest
195	+	final int timeoutMinutes = Math.max(runsPerTest / 10, 1);
196	+	for (TestCase lastTestCase = currentTestCase;;) {
197	+	try { MINUTES.sleep(timeoutMinutes); }
198	+	catch (InterruptedException unexpected) { break; }
199	+	if (lastTestCase == currentTestCase) {
200	+	System.err.println
201	+	("Looks like we're stuck running test: "
202	+	+ lastTestCase);
203	+	dumpTestThreads();
204	+	}
205	+	lastTestCase = currentTestCase;
206	+	}}};
207	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
208	+	thread.setDaemon(true);
209	+	thread.start();
210	+	}
211	+
212	+	public void runBare() throws Throwable {
213	+	currentTestCase = this;
214	+	if (methodFilter == null
215	+	|| methodFilter.matcher(toString()).find())
216	+	super.runBare();
217	+	}
218	+
219		protected void runTest() throws Throwable {
220	<	if (profileTests)
221	<	runTestProfiled();
222	<	else
223	<	super.runTest();
220	>	for (int i = 0; i < runsPerTest; i++) {
221	>	if (profileTests)
222	>	runTestProfiled();
223	>	else
224	>	super.runTest();
225	>	}
226		}
227
228		protected void runTestProfiled() throws Throwable {
229	<	long t0 = System.nanoTime();
230	<	try {
229	>	for (int i = 0; i < 2; i++) {
230	>	long startTime = System.nanoTime();
231		super.runTest();
232	<	} finally {
233	<	long elapsedMillis =
234	<	(System.nanoTime() - t0) / (1000L * 1000L);
235	<	if (elapsedMillis >= profileThreshold)
232	>	long elapsedMillis = millisElapsedSince(startTime);
233	>	if (elapsedMillis < profileThreshold)
234	>	break;
235	>	// Never report first run of any test; treat it as a
236	>	// warmup run, notably to trigger all needed classloading,
237	>	if (i > 0)
238		System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
239		}
240		}
241
242		/**
243	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
243	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
244		*/
245		public static void main(String[] args) {
246	+	main(suite(), args);
247	+	}
248	+
249	+	/**
250	+	* Runs all unit tests in the given test suite.
251	+	* Actual behavior influenced by jsr166.* system properties.
252	+	*/
253	+	static void main(Test suite, String[] args) {
254		if (useSecurityManager) {
255		System.err.println("Setting a permissive security manager");
256		Policy.setPolicy(permissivePolicy());
257		System.setSecurityManager(new SecurityManager());
258		}
259	<	int iters = (args.length == 0) ? 1 : Integer.parseInt(args[0]);
260	<
261	<	Test s = suite();
262	<	for (int i = 0; i < iters; ++i) {
148	<	junit.textui.TestRunner.run(s);
259	>	for (int i = 0; i < suiteRuns; i++) {
260	>	TestResult result = junit.textui.TestRunner.run(suite);
261	>	if (!result.wasSuccessful())
262	>	System.exit(1);
263		System.gc();
264		System.runFinalization();
265		}
152	–	System.exit(0);
266		}
267
268		public static TestSuite newTestSuite(Object... suiteOrClasses) {
#	Line 165 | Line 278 | public class JSR166TestCase extends Test
278		return suite;
279		}
280
281	+	public static void addNamedTestClasses(TestSuite suite,
282	+	String... testClassNames) {
283	+	for (String testClassName : testClassNames) {
284	+	try {
285	+	Class<?> testClass = Class.forName(testClassName);
286	+	Method m = testClass.getDeclaredMethod("suite",
287	+	new Class<?>[0]);
288	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
289	+	} catch (Exception e) {
290	+	throw new Error("Missing test class", e);
291	+	}
292	+	}
293	+	}
294	+
295	+	public static final double JAVA_CLASS_VERSION;
296	+	public static final String JAVA_SPECIFICATION_VERSION;
297	+	static {
298	+	try {
299	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
300	+	new java.security.PrivilegedAction<Double>() {
301	+	public Double run() {
302	+	return Double.valueOf(System.getProperty("java.class.version"));}});
303	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
304	+	new java.security.PrivilegedAction<String>() {
305	+	public String run() {
306	+	return System.getProperty("java.specification.version");}});
307	+	} catch (Throwable t) {
308	+	throw new Error(t);
309	+	}
310	+	}
311	+
312	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
313	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
314	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
315	+	public static boolean atLeastJava9() {
316	+	return JAVA_CLASS_VERSION >= 53.0
317	+	// As of 2015-09, java9 still uses 52.0 class file version
318	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
319	+	}
320	+	public static boolean atLeastJava10() {
321	+	return JAVA_CLASS_VERSION >= 54.0
322	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
323	+	}
324	+
325		/**
326		* Collects all JSR166 unit tests as one suite.
327		*/
328		public static Test suite() {
329	<	return newTestSuite(
329	>	// Java7+ test classes
330	>	TestSuite suite = newTestSuite(
331		ForkJoinPoolTest.suite(),
332		ForkJoinTaskTest.suite(),
333		RecursiveActionTest.suite(),
#	Line 234 | Line 392 | public class JSR166TestCase extends Test
392		TreeSetTest.suite(),
393		TreeSubMapTest.suite(),
394		TreeSubSetTest.suite());
395	+
396	+	// Java8+ test classes
397	+	if (atLeastJava8()) {
398	+	String[] java8TestClassNames = {
399	+	"Atomic8Test",
400	+	"CompletableFutureTest",
401	+	"ConcurrentHashMap8Test",
402	+	"CountedCompleterTest",
403	+	"DoubleAccumulatorTest",
404	+	"DoubleAdderTest",
405	+	"ForkJoinPool8Test",
406	+	"ForkJoinTask8Test",
407	+	"LongAccumulatorTest",
408	+	"LongAdderTest",
409	+	"SplittableRandomTest",
410	+	"StampedLockTest",
411	+	"SubmissionPublisherTest",
412	+	"ThreadLocalRandom8Test",
413	+	};
414	+	addNamedTestClasses(suite, java8TestClassNames);
415	+	}
416	+
417	+	// Java9+ test classes
418	+	if (atLeastJava9()) {
419	+	String[] java9TestClassNames = {
420	+	// Currently empty, but expecting varhandle tests
421	+	};
422	+	addNamedTestClasses(suite, java9TestClassNames);
423	+	}
424	+
425	+	return suite;
426	+	}
427	+
428	+	/** Returns list of junit-style test method names in given class. */
429	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
430	+	Method[] methods = testClass.getDeclaredMethods();
431	+	ArrayList<String> names = new ArrayList<String>(methods.length);
432	+	for (Method method : methods) {
433	+	if (method.getName().startsWith("test")
434	+	&& Modifier.isPublic(method.getModifiers())
435	+	// method.getParameterCount() requires jdk8+
436	+	&& method.getParameterTypes().length == 0) {
437	+	names.add(method.getName());
438	+	}
439	+	}
440	+	return names;
441	+	}
442	+
443	+	/**
444	+	* Returns junit-style testSuite for the given test class, but
445	+	* parameterized by passing extra data to each test.
446	+	*/
447	+	public static <ExtraData> Test parameterizedTestSuite
448	+	(Class<? extends JSR166TestCase> testClass,
449	+	Class<ExtraData> dataClass,
450	+	ExtraData data) {
451	+	try {
452	+	TestSuite suite = new TestSuite();
453	+	Constructor c =
454	+	testClass.getDeclaredConstructor(dataClass, String.class);
455	+	for (String methodName : testMethodNames(testClass))
456	+	suite.addTest((Test) c.newInstance(data, methodName));
457	+	return suite;
458	+	} catch (Exception e) {
459	+	throw new Error(e);
460	+	}
461	+	}
462	+
463	+	/**
464	+	* Returns junit-style testSuite for the jdk8 extension of the
465	+	* given test class, but parameterized by passing extra data to
466	+	* each test.  Uses reflection to allow compilation in jdk7.
467	+	*/
468	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
469	+	(Class<? extends JSR166TestCase> testClass,
470	+	Class<ExtraData> dataClass,
471	+	ExtraData data) {
472	+	if (atLeastJava8()) {
473	+	String name = testClass.getName();
474	+	String name8 = name.replaceAll("Test$", "8Test");
475	+	if (name.equals(name8)) throw new Error(name);
476	+	try {
477	+	return (Test)
478	+	Class.forName(name8)
479	+	.getMethod("testSuite", new Class[] { dataClass })
480	+	.invoke(null, data);
481	+	} catch (Exception e) {
482	+	throw new Error(e);
483	+	}
484	+	} else {
485	+	return new TestSuite();
486	+	}
487		}
488
489	+	// Delays for timing-dependent tests, in milliseconds.
490
491		public static long SHORT_DELAY_MS;
492		public static long SMALL_DELAY_MS;
493		public static long MEDIUM_DELAY_MS;
494		public static long LONG_DELAY_MS;
495
245	–
496		/**
497		* Returns the shortest timed delay. This could
498		* be reimplemented to use for example a Property.
#	Line 251 | Line 501 | public class JSR166TestCase extends Test
501		return 50;
502		}
503
254	–
504		/**
505		* Sets delays as multiples of SHORT_DELAY.
506		*/
#	Line 259 | Line 508 | public class JSR166TestCase extends Test
508		SHORT_DELAY_MS = getShortDelay();
509		SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
510		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
511	<	LONG_DELAY_MS   = SHORT_DELAY_MS * 50;
511	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
512	>	}
513	>
514	>	/**
515	>	* Returns a timeout in milliseconds to be used in tests that
516	>	* verify that operations block or time out.
517	>	*/
518	>	long timeoutMillis() {
519	>	return SHORT_DELAY_MS / 4;
520	>	}
521	>
522	>	/**
523	>	* Returns a new Date instance representing a time at least
524	>	* delayMillis milliseconds in the future.
525	>	*/
526	>	Date delayedDate(long delayMillis) {
527	>	// Add 1 because currentTimeMillis is known to round into the past.
528	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
529		}
530
531		/**
#	Line 275 | Line 541 | public class JSR166TestCase extends Test
541		* the same test have no effect.
542		*/
543		public void threadRecordFailure(Throwable t) {
544	+	System.err.println(t);
545	+	dumpTestThreads();
546		threadFailure.compareAndSet(null, t);
547		}
548
#	Line 282 | Line 550 | public class JSR166TestCase extends Test
550		setDelays();
551		}
552
553	+	void tearDownFail(String format, Object... args) {
554	+	String msg = toString() + ": " + String.format(format, args);
555	+	System.err.println(msg);
556	+	dumpTestThreads();
557	+	throw new AssertionFailedError(msg);
558	+	}
559	+
560		/**
561	+	* Extra checks that get done for all test cases.
562	+	*
563		* Triggers test case failure if any thread assertions have failed,
564		* by rethrowing, in the test harness thread, any exception recorded
565		* earlier by threadRecordFailure.
566	+	*
567	+	* Triggers test case failure if interrupt status is set in the main thread.
568		*/
569		public void tearDown() throws Exception {
570	<	Throwable t = threadFailure.get();
570	>	Throwable t = threadFailure.getAndSet(null);
571		if (t != null) {
572		if (t instanceof Error)
573		throw (Error) t;
#	Line 303 | Line 582 | public class JSR166TestCase extends Test
582		throw afe;
583		}
584		}
585	+
586	+	if (Thread.interrupted())
587	+	tearDownFail("interrupt status set in main thread");
588	+
589	+	checkForkJoinPoolThreadLeaks();
590	+	}
591	+
592	+	/**
593	+	* Finds missing try { ... } finally { joinPool(e); }
594	+	*/
595	+	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
596	+	Thread[] survivors = new Thread[7];
597	+	int count = Thread.enumerate(survivors);
598	+	for (int i = 0; i < count; i++) {
599	+	Thread thread = survivors[i];
600	+	String name = thread.getName();
601	+	if (name.startsWith("ForkJoinPool-")) {
602	+	// give thread some time to terminate
603	+	thread.join(LONG_DELAY_MS);
604	+	if (thread.isAlive())
605	+	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
606	+	thread);
607	+	}
608	+	}
609	+
610	+	if (!ForkJoinPool.commonPool()
611	+	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
612	+	tearDownFail("ForkJoin common pool thread stuck");
613		}
614
615		/**
#	Line 315 | Line 622 | public class JSR166TestCase extends Test
622		fail(reason);
623		} catch (AssertionFailedError t) {
624		threadRecordFailure(t);
625	<	fail(reason);
625	>	throw t;
626		}
627		}
628
#	Line 383 | Line 690 | public class JSR166TestCase extends Test
690		public void threadAssertEquals(Object x, Object y) {
691		try {
692		assertEquals(x, y);
693	<	} catch (AssertionFailedError t) {
694	<	threadRecordFailure(t);
695	<	throw t;
696	<	} catch (Throwable t) {
697	<	threadUnexpectedException(t);
693	>	} catch (AssertionFailedError fail) {
694	>	threadRecordFailure(fail);
695	>	throw fail;
696	>	} catch (Throwable fail) {
697	>	threadUnexpectedException(fail);
698		}
699		}
700
#	Line 399 | Line 706 | public class JSR166TestCase extends Test
706		public void threadAssertSame(Object x, Object y) {
707		try {
708		assertSame(x, y);
709	<	} catch (AssertionFailedError t) {
710	<	threadRecordFailure(t);
711	<	throw t;
709	>	} catch (AssertionFailedError fail) {
710	>	threadRecordFailure(fail);
711	>	throw fail;
712		}
713		}
714
#	Line 434 | Line 741 | public class JSR166TestCase extends Test
741		else {
742		AssertionFailedError afe =
743		new AssertionFailedError("unexpected exception: " + t);
744	<	t.initCause(t);
744	>	afe.initCause(t);
745		throw afe;
746		}
747		}
748
749		/**
750	+	* Delays, via Thread.sleep, for the given millisecond delay, but
751	+	* if the sleep is shorter than specified, may re-sleep or yield
752	+	* until time elapses.
753	+	*/
754	+	static void delay(long millis) throws InterruptedException {
755	+	long startTime = System.nanoTime();
756	+	long ns = millis * 1000 * 1000;
757	+	for (;;) {
758	+	if (millis > 0L)
759	+	Thread.sleep(millis);
760	+	else // too short to sleep
761	+	Thread.yield();
762	+	long d = ns - (System.nanoTime() - startTime);
763	+	if (d > 0L)
764	+	millis = d / (1000 * 1000);
765	+	else
766	+	break;
767	+	}
768	+	}
769	+
770	+	/**
771	+	* Allows use of try-with-resources with per-test thread pools.
772	+	*/
773	+	class PoolCloser<T extends ExecutorService>
774	+	implements AutoCloseable {
775	+	public final T pool;
776	+	public PoolCloser(T pool) { this.pool = pool; }
777	+	public void close() { joinPool(pool); }
778	+	}
779	+
780	+	/**
781		* Waits out termination of a thread pool or fails doing so.
782		*/
783	<	public void joinPool(ExecutorService exec) {
783	>	void joinPool(ExecutorService pool) {
784		try {
785	<	exec.shutdown();
786	<	assertTrue("ExecutorService did not terminate in a timely manner",
787	<	exec.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
785	>	pool.shutdown();
786	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
787	>	try {
788	>	threadFail("ExecutorService " + pool +
789	>	" did not terminate in a timely manner");
790	>	} finally {
791	>	// last resort, for the benefit of subsequent tests
792	>	pool.shutdownNow();
793	>	pool.awaitTermination(SMALL_DELAY_MS, MILLISECONDS);
794	>	}
795	>	}
796		} catch (SecurityException ok) {
797		// Allowed in case test doesn't have privs
798	<	} catch (InterruptedException ie) {
799	<	fail("Unexpected InterruptedException");
798	>	} catch (InterruptedException fail) {
799	>	threadFail("Unexpected InterruptedException");
800	>	}
801	>	}
802	>
803	>	/** Like Runnable, but with the freedom to throw anything */
804	>	interface Action { public void run() throws Throwable; }
805	>
806	>	/**
807	>	* Runs all the given actions in parallel, failing if any fail.
808	>	* Useful for running multiple variants of tests that are
809	>	* necessarily individually slow because they must block.
810	>	*/
811	>	void testInParallel(Action ... actions) {
812	>	try (PoolCloser<ExecutorService> poolCloser
813	>	= new PoolCloser<>(Executors.newCachedThreadPool())) {
814	>	ExecutorService pool = poolCloser.pool;
815	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
816	>	for (final Action action : actions)
817	>	futures.add(pool.submit(new CheckedRunnable() {
818	>	public void realRun() throws Throwable { action.run();}}));
819	>	for (Future<?> future : futures)
820	>	try {
821	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
822	>	} catch (ExecutionException ex) {
823	>	threadUnexpectedException(ex.getCause());
824	>	} catch (Exception ex) {
825	>	threadUnexpectedException(ex);
826	>	}
827	>	}
828	>	}
829	>
830	>	/**
831	>	* A debugging tool to print stack traces of most threads, as jstack does.
832	>	* Uninteresting threads are filtered out.
833	>	*/
834	>	static void dumpTestThreads() {
835	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
836	>	System.err.println("------ stacktrace dump start ------");
837	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
838	>	String name = info.getThreadName();
839	>	if ("Signal Dispatcher".equals(name))
840	>	continue;
841	>	if ("Reference Handler".equals(name)
842	>	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
843	>	continue;
844	>	if ("Finalizer".equals(name)
845	>	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
846	>	continue;
847	>	if ("checkForWedgedTest".equals(name))
848	>	continue;
849	>	System.err.print(info);
850		}
851	+	System.err.println("------ stacktrace dump end ------");
852		}
853
854	+	/**
855	+	* Checks that thread does not terminate within the default
856	+	* millisecond delay of {@code timeoutMillis()}.
857	+	*/
858	+	void assertThreadStaysAlive(Thread thread) {
859	+	assertThreadStaysAlive(thread, timeoutMillis());
860	+	}
861	+
862	+	/**
863	+	* Checks that thread does not terminate within the given millisecond delay.
864	+	*/
865	+	void assertThreadStaysAlive(Thread thread, long millis) {
866	+	try {
867	+	// No need to optimize the failing case via Thread.join.
868	+	delay(millis);
869	+	assertTrue(thread.isAlive());
870	+	} catch (InterruptedException fail) {
871	+	threadFail("Unexpected InterruptedException");
872	+	}
873	+	}
874	+
875	+	/**
876	+	* Checks that the threads do not terminate within the default
877	+	* millisecond delay of {@code timeoutMillis()}.
878	+	*/
879	+	void assertThreadsStayAlive(Thread... threads) {
880	+	assertThreadsStayAlive(timeoutMillis(), threads);
881	+	}
882	+
883	+	/**
884	+	* Checks that the threads do not terminate within the given millisecond delay.
885	+	*/
886	+	void assertThreadsStayAlive(long millis, Thread... threads) {
887	+	try {
888	+	// No need to optimize the failing case via Thread.join.
889	+	delay(millis);
890	+	for (Thread thread : threads)
891	+	assertTrue(thread.isAlive());
892	+	} catch (InterruptedException fail) {
893	+	threadFail("Unexpected InterruptedException");
894	+	}
895	+	}
896	+
897	+	/**
898	+	* Checks that future.get times out, with the default timeout of
899	+	* {@code timeoutMillis()}.
900	+	*/
901	+	void assertFutureTimesOut(Future future) {
902	+	assertFutureTimesOut(future, timeoutMillis());
903	+	}
904	+
905	+	/**
906	+	* Checks that future.get times out, with the given millisecond timeout.
907	+	*/
908	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
909	+	long startTime = System.nanoTime();
910	+	try {
911	+	future.get(timeoutMillis, MILLISECONDS);
912	+	shouldThrow();
913	+	} catch (TimeoutException success) {
914	+	} catch (Exception fail) {
915	+	threadUnexpectedException(fail);
916	+	} finally { future.cancel(true); }
917	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
918	+	}
919
920		/**
921		* Fails with message "should throw exception".
#	Line 494 | Line 956 | public class JSR166TestCase extends Test
956		public static final Integer m6  = new Integer(-6);
957		public static final Integer m10 = new Integer(-10);
958
497	–
959		/**
960		* Runs Runnable r with a security policy that permits precisely
961		* the specified permissions.  If there is no current security
#	Line 506 | Line 967 | public class JSR166TestCase extends Test
967		SecurityManager sm = System.getSecurityManager();
968		if (sm == null) {
969		r.run();
970	+	}
971	+	runWithSecurityManagerWithPermissions(r, permissions);
972	+	}
973	+
974	+	/**
975	+	* Runs Runnable r with a security policy that permits precisely
976	+	* the specified permissions.  If there is no current security
977	+	* manager, a temporary one is set for the duration of the
978	+	* Runnable.  We require that any security manager permit
979	+	* getPolicy/setPolicy.
980	+	*/
981	+	public void runWithSecurityManagerWithPermissions(Runnable r,
982	+	Permission... permissions) {
983	+	SecurityManager sm = System.getSecurityManager();
984	+	if (sm == null) {
985		Policy savedPolicy = Policy.getPolicy();
986		try {
987		Policy.setPolicy(permissivePolicy());
988		System.setSecurityManager(new SecurityManager());
989	<	runWithPermissions(r, permissions);
989	>	runWithSecurityManagerWithPermissions(r, permissions);
990		} finally {
991		System.setSecurityManager(null);
992		Policy.setPolicy(savedPolicy);
#	Line 558 | Line 1034 | public class JSR166TestCase extends Test
1034		return perms.implies(p);
1035		}
1036		public void refresh() {}
1037	+	public String toString() {
1038	+	List<Permission> ps = new ArrayList<Permission>();
1039	+	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1040	+	ps.add(e.nextElement());
1041	+	return "AdjustablePolicy with permissions " + ps;
1042	+	}
1043		}
1044
1045		/**
#	Line 585 | Line 1067 | public class JSR166TestCase extends Test
1067		*/
1068		void sleep(long millis) {
1069		try {
1070	<	Thread.sleep(millis);
1071	<	} catch (InterruptedException ie) {
1070	>	delay(millis);
1071	>	} catch (InterruptedException fail) {
1072		AssertionFailedError afe =
1073		new AssertionFailedError("Unexpected InterruptedException");
1074	<	afe.initCause(ie);
1074	>	afe.initCause(fail);
1075		throw afe;
1076		}
1077		}
1078
1079		/**
1080	<	* Sleeps until the timeout has elapsed, or interrupted.
1081	<	* Does <em>NOT</em> throw InterruptedException.
1080	>	* Spin-waits up to the specified number of milliseconds for the given
1081	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1082	>	*/
1083	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1084	>	long startTime = System.nanoTime();
1085	>	for (;;) {
1086	>	Thread.State s = thread.getState();
1087	>	if (s == Thread.State.BLOCKED ||
1088	>	s == Thread.State.WAITING ||
1089	>	s == Thread.State.TIMED_WAITING)
1090	>	return;
1091	>	else if (s == Thread.State.TERMINATED)
1092	>	fail("Unexpected thread termination");
1093	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1094	>	threadAssertTrue(thread.isAlive());
1095	>	return;
1096	>	}
1097	>	Thread.yield();
1098	>	}
1099	>	}
1100	>
1101	>	/**
1102	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1103	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1104	>	*/
1105	>	void waitForThreadToEnterWaitState(Thread thread) {
1106	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1107	>	}
1108	>
1109	>	/**
1110	>	* Returns the number of milliseconds since time given by
1111	>	* startNanoTime, which must have been previously returned from a
1112	>	* call to {@link System#nanoTime()}.
1113	>	*/
1114	>	static long millisElapsedSince(long startNanoTime) {
1115	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1116	>	}
1117	>
1118	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1119	>	//         long startTime = System.nanoTime();
1120	>	//         try {
1121	>	//             r.run();
1122	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1123	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1124	>	//             throw new AssertionFailedError("did not return promptly");
1125	>	//     }
1126	>
1127	>	//     void assertTerminatesPromptly(Runnable r) {
1128	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1129	>	//     }
1130	>
1131	>	/**
1132	>	* Checks that timed f.get() returns the expected value, and does not
1133	>	* wait for the timeout to elapse before returning.
1134		*/
1135	<	void sleepTillInterrupted(long timeoutMillis) {
1135	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1136	>	long startTime = System.nanoTime();
1137		try {
1138	<	Thread.sleep(timeoutMillis);
1139	<	} catch (InterruptedException wakeup) {}
1138	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1139	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1140	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1141	>	throw new AssertionFailedError("timed get did not return promptly");
1142	>	}
1143	>
1144	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1145	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1146		}
1147
1148		/**
#	Line 622 | Line 1163 | public class JSR166TestCase extends Test
1163		void awaitTermination(Thread t, long timeoutMillis) {
1164		try {
1165		t.join(timeoutMillis);
1166	<	} catch (InterruptedException ie) {
1167	<	threadUnexpectedException(ie);
1166	>	} catch (InterruptedException fail) {
1167	>	threadUnexpectedException(fail);
1168		} finally {
1169	<	if (t.isAlive()) {
1169	>	if (t.getState() != Thread.State.TERMINATED) {
1170		t.interrupt();
1171		fail("Test timed out");
1172		}
1173		}
1174		}
1175
1176	+	/**
1177	+	* Waits for LONG_DELAY_MS milliseconds for the thread to
1178	+	* terminate (using {@link Thread#join(long)}), else interrupts
1179	+	* the thread (in the hope that it may terminate later) and fails.
1180	+	*/
1181	+	void awaitTermination(Thread t) {
1182	+	awaitTermination(t, LONG_DELAY_MS);
1183	+	}
1184	+
1185		// Some convenient Runnable classes
1186
1187		public abstract class CheckedRunnable implements Runnable {
#	Line 640 | Line 1190 | public class JSR166TestCase extends Test
1190		public final void run() {
1191		try {
1192		realRun();
1193	<	} catch (Throwable t) {
1194	<	threadUnexpectedException(t);
1193	>	} catch (Throwable fail) {
1194	>	threadUnexpectedException(fail);
1195		}
1196		}
1197		}
#	Line 694 | Line 1244 | public class JSR166TestCase extends Test
1244		realRun();
1245		threadShouldThrow("InterruptedException");
1246		} catch (InterruptedException success) {
1247	<	} catch (Throwable t) {
1248	<	threadUnexpectedException(t);
1247	>	threadAssertFalse(Thread.interrupted());
1248	>	} catch (Throwable fail) {
1249	>	threadUnexpectedException(fail);
1250		}
1251		}
1252		}
#	Line 706 | Line 1257 | public class JSR166TestCase extends Test
1257		public final T call() {
1258		try {
1259		return realCall();
1260	<	} catch (Throwable t) {
1261	<	threadUnexpectedException(t);
1260	>	} catch (Throwable fail) {
1261	>	threadUnexpectedException(fail);
1262		return null;
1263		}
1264		}
#	Line 723 | Line 1274 | public class JSR166TestCase extends Test
1274		threadShouldThrow("InterruptedException");
1275		return result;
1276		} catch (InterruptedException success) {
1277	<	} catch (Throwable t) {
1278	<	threadUnexpectedException(t);
1277	>	threadAssertFalse(Thread.interrupted());
1278	>	} catch (Throwable fail) {
1279	>	threadUnexpectedException(fail);
1280		}
1281		return null;
1282		}
#	Line 741 | Line 1293 | public class JSR166TestCase extends Test
1293		public static final String TEST_STRING = "a test string";
1294
1295		public static class StringTask implements Callable<String> {
1296	<	public String call() { return TEST_STRING; }
1296	>	final String value;
1297	>	public StringTask() { this(TEST_STRING); }
1298	>	public StringTask(String value) { this.value = value; }
1299	>	public String call() { return value; }
1300		}
1301
1302		public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1303		return new CheckedCallable<String>() {
1304	<	public String realCall() {
1304	>	protected String realCall() {
1305		try {
1306		latch.await();
1307		} catch (InterruptedException quittingTime) {}
#	Line 754 | Line 1309 | public class JSR166TestCase extends Test
1309		}};
1310		}
1311
1312	+	public Runnable countDowner(final CountDownLatch latch) {
1313	+	return new CheckedRunnable() {
1314	+	public void realRun() throws InterruptedException {
1315	+	latch.countDown();
1316	+	}};
1317	+	}
1318	+
1319	+	public Runnable awaiter(final CountDownLatch latch) {
1320	+	return new CheckedRunnable() {
1321	+	public void realRun() throws InterruptedException {
1322	+	await(latch);
1323	+	}};
1324	+	}
1325	+
1326	+	public void await(CountDownLatch latch) {
1327	+	try {
1328	+	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1329	+	} catch (Throwable fail) {
1330	+	threadUnexpectedException(fail);
1331	+	}
1332	+	}
1333	+
1334	+	public void await(Semaphore semaphore) {
1335	+	try {
1336	+	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1337	+	} catch (Throwable fail) {
1338	+	threadUnexpectedException(fail);
1339	+	}
1340	+	}
1341	+
1342	+	//     /**
1343	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1344	+	//      */
1345	+	//     public void await(AtomicBoolean flag) {
1346	+	//         await(flag, LONG_DELAY_MS);
1347	+	//     }
1348	+
1349	+	//     /**
1350	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1351	+	//      */
1352	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1353	+	//         long startTime = System.nanoTime();
1354	+	//         while (!flag.get()) {
1355	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1356	+	//                 throw new AssertionFailedError("timed out");
1357	+	//             Thread.yield();
1358	+	//         }
1359	+	//     }
1360	+
1361		public static class NPETask implements Callable<String> {
1362		public String call() { throw new NullPointerException(); }
1363		}
#	Line 764 | Line 1368 | public class JSR166TestCase extends Test
1368
1369		public class ShortRunnable extends CheckedRunnable {
1370		protected void realRun() throws Throwable {
1371	<	Thread.sleep(SHORT_DELAY_MS);
1371	>	delay(SHORT_DELAY_MS);
1372		}
1373		}
1374
1375		public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1376		protected void realRun() throws InterruptedException {
1377	<	Thread.sleep(SHORT_DELAY_MS);
1377	>	delay(SHORT_DELAY_MS);
1378		}
1379		}
1380
1381		public class SmallRunnable extends CheckedRunnable {
1382		protected void realRun() throws Throwable {
1383	<	Thread.sleep(SMALL_DELAY_MS);
1383	>	delay(SMALL_DELAY_MS);
1384		}
1385		}
1386
1387		public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1388		protected void realRun() {
1389		try {
1390	<	Thread.sleep(SMALL_DELAY_MS);
1390	>	delay(SMALL_DELAY_MS);
1391		} catch (InterruptedException ok) {}
1392		}
1393		}
1394
1395		public class SmallCallable extends CheckedCallable {
1396		protected Object realCall() throws InterruptedException {
1397	<	Thread.sleep(SMALL_DELAY_MS);
1397	>	delay(SMALL_DELAY_MS);
1398		return Boolean.TRUE;
1399		}
1400		}
1401
1402		public class MediumRunnable extends CheckedRunnable {
1403		protected void realRun() throws Throwable {
1404	<	Thread.sleep(MEDIUM_DELAY_MS);
1404	>	delay(MEDIUM_DELAY_MS);
1405		}
1406		}
1407
1408		public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1409		protected void realRun() throws InterruptedException {
1410	<	Thread.sleep(MEDIUM_DELAY_MS);
1410	>	delay(MEDIUM_DELAY_MS);
1411		}
1412		}
1413
#	Line 811 | Line 1415 | public class JSR166TestCase extends Test
1415		return new CheckedRunnable() {
1416		protected void realRun() {
1417		try {
1418	<	Thread.sleep(timeoutMillis);
1418	>	delay(timeoutMillis);
1419		} catch (InterruptedException ok) {}
1420		}};
1421		}
#	Line 819 | Line 1423 | public class JSR166TestCase extends Test
1423		public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1424		protected void realRun() {
1425		try {
1426	<	Thread.sleep(MEDIUM_DELAY_MS);
1426	>	delay(MEDIUM_DELAY_MS);
1427		} catch (InterruptedException ok) {}
1428		}
1429		}
#	Line 827 | Line 1431 | public class JSR166TestCase extends Test
1431		public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1432		protected void realRun() {
1433		try {
1434	<	Thread.sleep(LONG_DELAY_MS);
1434	>	delay(LONG_DELAY_MS);
1435		} catch (InterruptedException ok) {}
1436		}
1437		}
#	Line 851 | Line 1455 | public class JSR166TestCase extends Test
1455		public boolean isDone() { return done; }
1456		public void run() {
1457		try {
1458	<	Thread.sleep(timeoutMillis);
1458	>	delay(timeoutMillis);
1459		done = true;
1460		} catch (InterruptedException ok) {}
1461		}
#	Line 862 | Line 1466 | public class JSR166TestCase extends Test
1466		public volatile boolean done = false;
1467		public void run() {
1468		try {
1469	<	Thread.sleep(SHORT_DELAY_MS);
1469	>	delay(SHORT_DELAY_MS);
1470		done = true;
1471		} catch (InterruptedException ok) {}
1472		}
#	Line 872 | Line 1476 | public class JSR166TestCase extends Test
1476		public volatile boolean done = false;
1477		public void run() {
1478		try {
1479	<	Thread.sleep(SMALL_DELAY_MS);
1479	>	delay(SMALL_DELAY_MS);
1480		done = true;
1481		} catch (InterruptedException ok) {}
1482		}
#	Line 882 | Line 1486 | public class JSR166TestCase extends Test
1486		public volatile boolean done = false;
1487		public void run() {
1488		try {
1489	<	Thread.sleep(MEDIUM_DELAY_MS);
1489	>	delay(MEDIUM_DELAY_MS);
1490		done = true;
1491		} catch (InterruptedException ok) {}
1492		}
#	Line 892 | Line 1496 | public class JSR166TestCase extends Test
1496		public volatile boolean done = false;
1497		public void run() {
1498		try {
1499	<	Thread.sleep(LONG_DELAY_MS);
1499	>	delay(LONG_DELAY_MS);
1500		done = true;
1501		} catch (InterruptedException ok) {}
1502		}
#	Line 909 | Line 1513 | public class JSR166TestCase extends Test
1513		public volatile boolean done = false;
1514		public Object call() {
1515		try {
1516	<	Thread.sleep(SMALL_DELAY_MS);
1516	>	delay(SMALL_DELAY_MS);
1517		done = true;
1518		} catch (InterruptedException ok) {}
1519		return Boolean.TRUE;
#	Line 922 | Line 1526 | public class JSR166TestCase extends Test
1526		public abstract class CheckedRecursiveAction extends RecursiveAction {
1527		protected abstract void realCompute() throws Throwable;
1528
1529	<	public final void compute() {
1529	>	@Override protected final void compute() {
1530		try {
1531		realCompute();
1532	<	} catch (Throwable t) {
1533	<	threadUnexpectedException(t);
1532	>	} catch (Throwable fail) {
1533	>	threadUnexpectedException(fail);
1534		}
1535		}
1536		}
#	Line 937 | Line 1541 | public class JSR166TestCase extends Test
1541		public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1542		protected abstract T realCompute() throws Throwable;
1543
1544	<	public final T compute() {
1544	>	@Override protected final T compute() {
1545		try {
1546		return realCompute();
1547	<	} catch (Throwable t) {
1548	<	threadUnexpectedException(t);
1547	>	} catch (Throwable fail) {
1548	>	threadUnexpectedException(fail);
1549		return null;
1550		}
1551		}
#	Line 956 | Line 1560 | public class JSR166TestCase extends Test
1560		}
1561
1562		/**
1563	<	* A CyclicBarrier that fails with AssertionFailedErrors instead
1564	<	* of throwing checked exceptions.
1563	>	* A CyclicBarrier that uses timed await and fails with
1564	>	* AssertionFailedErrors instead of throwing checked exceptions.
1565		*/
1566		public class CheckedBarrier extends CyclicBarrier {
1567		public CheckedBarrier(int parties) { super(parties); }
1568
1569		public int await() {
1570		try {
1571	<	return super.await();
1572	<	} catch (Exception e) {
1571	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1572	>	} catch (TimeoutException timedOut) {
1573	>	throw new AssertionFailedError("timed out");
1574	>	} catch (Exception fail) {
1575		AssertionFailedError afe =
1576	<	new AssertionFailedError("Unexpected exception: " + e);
1577	<	afe.initCause(e);
1576	>	new AssertionFailedError("Unexpected exception: " + fail);
1577	>	afe.initCause(fail);
1578		throw afe;
1579		}
1580		}
1581		}
1582
1583	+	void checkEmpty(BlockingQueue q) {
1584	+	try {
1585	+	assertTrue(q.isEmpty());
1586	+	assertEquals(0, q.size());
1587	+	assertNull(q.peek());
1588	+	assertNull(q.poll());
1589	+	assertNull(q.poll(0, MILLISECONDS));
1590	+	assertEquals(q.toString(), "[]");
1591	+	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1592	+	assertFalse(q.iterator().hasNext());
1593	+	try {
1594	+	q.element();
1595	+	shouldThrow();
1596	+	} catch (NoSuchElementException success) {}
1597	+	try {
1598	+	q.iterator().next();
1599	+	shouldThrow();
1600	+	} catch (NoSuchElementException success) {}
1601	+	try {
1602	+	q.remove();
1603	+	shouldThrow();
1604	+	} catch (NoSuchElementException success) {}
1605	+	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1606	+	}
1607	+
1608	+	void assertSerialEquals(Object x, Object y) {
1609	+	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1610	+	}
1611	+
1612	+	void assertNotSerialEquals(Object x, Object y) {
1613	+	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1614	+	}
1615	+
1616	+	byte[] serialBytes(Object o) {
1617	+	try {
1618	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1619	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1620	+	oos.writeObject(o);
1621	+	oos.flush();
1622	+	oos.close();
1623	+	return bos.toByteArray();
1624	+	} catch (Throwable fail) {
1625	+	threadUnexpectedException(fail);
1626	+	return new byte[0];
1627	+	}
1628	+	}
1629	+
1630	+	@SuppressWarnings("unchecked")
1631	+	<T> T serialClone(T o) {
1632	+	try {
1633	+	ObjectInputStream ois = new ObjectInputStream
1634	+	(new ByteArrayInputStream(serialBytes(o)));
1635	+	T clone = (T) ois.readObject();
1636	+	assertSame(o.getClass(), clone.getClass());
1637	+	return clone;
1638	+	} catch (Throwable fail) {
1639	+	threadUnexpectedException(fail);
1640	+	return null;
1641	+	}
1642	+	}
1643	+
1644	+	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1645	+	Runnable... throwingActions) {
1646	+	for (Runnable throwingAction : throwingActions) {
1647	+	boolean threw = false;
1648	+	try { throwingAction.run(); }
1649	+	catch (Throwable t) {
1650	+	threw = true;
1651	+	if (!expectedExceptionClass.isInstance(t)) {
1652	+	AssertionFailedError afe =
1653	+	new AssertionFailedError
1654	+	("Expected " + expectedExceptionClass.getName() +
1655	+	", got " + t.getClass().getName());
1656	+	afe.initCause(t);
1657	+	threadUnexpectedException(afe);
1658	+	}
1659	+	}
1660	+	if (!threw)
1661	+	shouldThrow(expectedExceptionClass.getName());
1662	+	}
1663	+	}
1664	+
1665	+	public void assertIteratorExhausted(Iterator<?> it) {
1666	+	try {
1667	+	it.next();
1668	+	shouldThrow();
1669	+	} catch (NoSuchElementException success) {}
1670	+	assertFalse(it.hasNext());
1671	+	}
1672		}

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