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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.66 by jsr166, Thu Oct 28 17:57:26 2010 UTC vs.
Revision 1.153 by jsr166, Sat Oct 3 19:37:43 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.NANOSECONDS;
11	+
12	+	import java.io.ByteArrayInputStream;
13	+	import java.io.ByteArrayOutputStream;
14	+	import java.io.ObjectInputStream;
15	+	import java.io.ObjectOutputStream;
16	+	import java.lang.management.ManagementFactory;
17	+	import java.lang.management.ThreadInfo;
18	+	import java.lang.management.ThreadMXBean;
19	+	import java.lang.reflect.Constructor;
20	+	import java.lang.reflect.Method;
21	+	import java.lang.reflect.Modifier;
22		import java.security.CodeSource;
23		import java.security.Permission;
24		import java.security.PermissionCollection;
#	Line 19 | Line 26 | import java.security.Permissions;
26		import java.security.Policy;
27		import java.security.ProtectionDomain;
28		import java.security.SecurityPermission;
29	+	import java.util.ArrayList;
30	+	import java.util.Arrays;
31	+	import java.util.Date;
32	+	import java.util.Enumeration;
33	+	import java.util.Iterator;
34	+	import java.util.List;
35	+	import java.util.NoSuchElementException;
36	+	import java.util.PropertyPermission;
37	+	import java.util.concurrent.BlockingQueue;
38	+	import java.util.concurrent.Callable;
39	+	import java.util.concurrent.CountDownLatch;
40	+	import java.util.concurrent.CyclicBarrier;
41	+	import java.util.concurrent.ExecutionException;
42	+	import java.util.concurrent.Executors;
43	+	import java.util.concurrent.ExecutorService;
44	+	import java.util.concurrent.ForkJoinPool;
45	+	import java.util.concurrent.Future;
46	+	import java.util.concurrent.RecursiveAction;
47	+	import java.util.concurrent.RecursiveTask;
48	+	import java.util.concurrent.RejectedExecutionHandler;
49	+	import java.util.concurrent.Semaphore;
50	+	import java.util.concurrent.ThreadFactory;
51	+	import java.util.concurrent.ThreadPoolExecutor;
52	+	import java.util.concurrent.TimeoutException;
53	+	import java.util.concurrent.atomic.AtomicReference;
54	+	import java.util.regex.Pattern;
55	+
56	+	import junit.framework.AssertionFailedError;
57	+	import junit.framework.Test;
58	+	import junit.framework.TestCase;
59	+	import junit.framework.TestResult;
60	+	import junit.framework.TestSuite;
61
62		/**
63		* Base class for JSR166 Junit TCK tests.  Defines some constants,
#	Line 30 | Line 69 | import java.security.SecurityPermission;
69		*
70		* <ol>
71		*
72	<	* <li> All assertions in code running in generated threads must use
72	>	* <li>All assertions in code running in generated threads must use
73		* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
74		* #threadAssertEquals}, or {@link #threadAssertNull}, (not
75		* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
76		* particularly recommended) for other code to use these forms too.
77		* Only the most typically used JUnit assertion methods are defined
78	<	* this way, but enough to live with.</li>
78	>	* this way, but enough to live with.
79		*
80	<	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
80	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
81		* to invoke {@code super.setUp} and {@code super.tearDown} within
82		* them. These methods are used to clear and check for thread
83	<	* assertion failures.</li>
83	>	* assertion failures.
84		*
85		* <li>All delays and timeouts must use one of the constants {@code
86		* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
#	Line 52 | Line 91 | import java.security.SecurityPermission;
91		* is always discriminable as larger than SHORT and smaller than
92		* MEDIUM.  And so on. These constants are set to conservative values,
93		* but even so, if there is ever any doubt, they can all be increased
94	<	* in one spot to rerun tests on slower platforms.</li>
94	>	* in one spot to rerun tests on slower platforms.
95		*
96	<	* <li> All threads generated must be joined inside each test case
96	>	* <li>All threads generated must be joined inside each test case
97		* method (or {@code fail} to do so) before returning from the
98		* method. The {@code joinPool} method can be used to do this when
99	<	* using Executors.</li>
99	>	* using Executors.
100		*
101		* </ol>
102		*
103	<	* <p> <b>Other notes</b>
103	>	* <p><b>Other notes</b>
104		* <ul>
105		*
106	<	* <li> Usually, there is one testcase method per JSR166 method
106	>	* <li>Usually, there is one testcase method per JSR166 method
107		* covering "normal" operation, and then as many exception-testing
108		* methods as there are exceptions the method can throw. Sometimes
109		* there are multiple tests per JSR166 method when the different
110		* "normal" behaviors differ significantly. And sometimes testcases
111		* cover multiple methods when they cannot be tested in
112	<	* isolation.</li>
112	>	* isolation.
113		*
114	<	* <li> The documentation style for testcases is to provide as javadoc
114	>	* <li>The documentation style for testcases is to provide as javadoc
115		* a simple sentence or two describing the property that the testcase
116		* method purports to test. The javadocs do not say anything about how
117	<	* the property is tested. To find out, read the code.</li>
117	>	* the property is tested. To find out, read the code.
118		*
119	<	* <li> These tests are "conformance tests", and do not attempt to
119	>	* <li>These tests are "conformance tests", and do not attempt to
120		* test throughput, latency, scalability or other performance factors
121		* (see the separate "jtreg" tests for a set intended to check these
122		* for the most central aspects of functionality.) So, most tests use
123		* the smallest sensible numbers of threads, collection sizes, etc
124	<	* needed to check basic conformance.</li>
124	>	* needed to check basic conformance.
125		*
126		* <li>The test classes currently do not declare inclusion in
127		* any particular package to simplify things for people integrating
128	<	* them in TCK test suites.</li>
128	>	* them in TCK test suites.
129		*
130	<	* <li> As a convenience, the {@code main} of this class (JSR166TestCase)
131	<	* runs all JSR166 unit tests.</li>
130	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
131	>	* runs all JSR166 unit tests.
132		*
133		* </ul>
134		*/
#	Line 101 | Line 140 | public class JSR166TestCase extends Test
140		Boolean.getBoolean("jsr166.expensiveTests");
141
142		/**
143	+	* If true, also run tests that are not part of the official tck
144	+	* because they test unspecified implementation details.
145	+	*/
146	+	protected static final boolean testImplementationDetails =
147	+	Boolean.getBoolean("jsr166.testImplementationDetails");
148	+
149	+	/**
150		* If true, report on stdout all "slow" tests, that is, ones that
151		* take more than profileThreshold milliseconds to execute.
152		*/
#	Line 114 | Line 160 | public class JSR166TestCase extends Test
160		private static final long profileThreshold =
161		Long.getLong("jsr166.profileThreshold", 100);
162
163	+	/**
164	+	* The number of repetitions per test (for tickling rare bugs).
165	+	*/
166	+	private static final int runsPerTest =
167	+	Integer.getInteger("jsr166.runsPerTest", 1);
168	+
169	+	/**
170	+	* The number of repetitions of the test suite (for finding leaks?).
171	+	*/
172	+	private static final int suiteRuns =
173	+	Integer.getInteger("jsr166.suiteRuns", 1);
174	+
175	+	public JSR166TestCase() { super(); }
176	+	public JSR166TestCase(String name) { super(name); }
177	+
178	+	/**
179	+	* A filter for tests to run, matching strings of the form
180	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
181	+	* Usefully combined with jsr166.runsPerTest.
182	+	*/
183	+	private static final Pattern methodFilter = methodFilter();
184	+
185	+	private static Pattern methodFilter() {
186	+	String regex = System.getProperty("jsr166.methodFilter");
187	+	return (regex == null) ? null : Pattern.compile(regex);
188	+	}
189	+
190	+	public void runBare() throws Throwable {
191	+	if (methodFilter == null
192	+	|| methodFilter.matcher(toString()).find())
193	+	super.runBare();
194	+	}
195	+
196		protected void runTest() throws Throwable {
197	<	if (profileTests)
198	<	runTestProfiled();
199	<	else
200	<	super.runTest();
197	>	for (int i = 0; i < runsPerTest; i++) {
198	>	if (profileTests)
199	>	runTestProfiled();
200	>	else
201	>	super.runTest();
202	>	}
203		}
204
205		protected void runTestProfiled() throws Throwable {
206	<	long t0 = System.nanoTime();
207	<	try {
206	>	for (int i = 0; i < 2; i++) {
207	>	long startTime = System.nanoTime();
208		super.runTest();
209	<	} finally {
210	<	long elapsedMillis =
211	<	(System.nanoTime() - t0) / (1000L * 1000L);
212	<	if (elapsedMillis >= profileThreshold)
209	>	long elapsedMillis = millisElapsedSince(startTime);
210	>	if (elapsedMillis < profileThreshold)
211	>	break;
212	>	// Never report first run of any test; treat it as a
213	>	// warmup run, notably to trigger all needed classloading,
214	>	if (i > 0)
215		System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
216		}
217		}
218
219		/**
220	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
220	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
221		*/
222		public static void main(String[] args) {
223	+	main(suite(), args);
224	+	}
225	+
226	+	/**
227	+	* Runs all unit tests in the given test suite.
228	+	* Actual behavior influenced by jsr166.* system properties.
229	+	*/
230	+	static void main(Test suite, String[] args) {
231		if (useSecurityManager) {
232		System.err.println("Setting a permissive security manager");
233		Policy.setPolicy(permissivePolicy());
234		System.setSecurityManager(new SecurityManager());
235		}
236	<	int iters = (args.length == 0) ? 1 : Integer.parseInt(args[0]);
237	<
238	<	Test s = suite();
239	<	for (int i = 0; i < iters; ++i) {
149	<	junit.textui.TestRunner.run(s);
236	>	for (int i = 0; i < suiteRuns; i++) {
237	>	TestResult result = junit.textui.TestRunner.run(suite);
238	>	if (!result.wasSuccessful())
239	>	System.exit(1);
240		System.gc();
241		System.runFinalization();
242		}
153	–	System.exit(0);
243		}
244
245		public static TestSuite newTestSuite(Object... suiteOrClasses) {
#	Line 166 | Line 255 | public class JSR166TestCase extends Test
255		return suite;
256		}
257
258	+	public static void addNamedTestClasses(TestSuite suite,
259	+	String... testClassNames) {
260	+	for (String testClassName : testClassNames) {
261	+	try {
262	+	Class<?> testClass = Class.forName(testClassName);
263	+	Method m = testClass.getDeclaredMethod("suite",
264	+	new Class<?>[0]);
265	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
266	+	} catch (Exception e) {
267	+	throw new Error("Missing test class", e);
268	+	}
269	+	}
270	+	}
271	+
272	+	public static final double JAVA_CLASS_VERSION;
273	+	public static final String JAVA_SPECIFICATION_VERSION;
274	+	static {
275	+	try {
276	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
277	+	new java.security.PrivilegedAction<Double>() {
278	+	public Double run() {
279	+	return Double.valueOf(System.getProperty("java.class.version"));}});
280	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
281	+	new java.security.PrivilegedAction<String>() {
282	+	public String run() {
283	+	return System.getProperty("java.specification.version");}});
284	+	} catch (Throwable t) {
285	+	throw new Error(t);
286	+	}
287	+	}
288	+
289	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
290	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
291	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
292	+	public static boolean atLeastJava9() {
293	+	return JAVA_CLASS_VERSION >= 53.0
294	+	// As of 2015-09, java9 still uses 52.0 class file version
295	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
296	+	}
297	+	public static boolean atLeastJava10() {
298	+	return JAVA_CLASS_VERSION >= 54.0
299	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
300	+	}
301	+
302		/**
303		* Collects all JSR166 unit tests as one suite.
304		*/
305		public static Test suite() {
306	<	return newTestSuite(
306	>	// Java7+ test classes
307	>	TestSuite suite = newTestSuite(
308		ForkJoinPoolTest.suite(),
309		ForkJoinTaskTest.suite(),
310		RecursiveActionTest.suite(),
#	Line 235 | Line 369 | public class JSR166TestCase extends Test
369		TreeSetTest.suite(),
370		TreeSubMapTest.suite(),
371		TreeSubSetTest.suite());
372	+
373	+	// Java8+ test classes
374	+	if (atLeastJava8()) {
375	+	String[] java8TestClassNames = {
376	+	"Atomic8Test",
377	+	"CompletableFutureTest",
378	+	"ConcurrentHashMap8Test",
379	+	"CountedCompleterTest",
380	+	"DoubleAccumulatorTest",
381	+	"DoubleAdderTest",
382	+	"ForkJoinPool8Test",
383	+	"ForkJoinTask8Test",
384	+	"LongAccumulatorTest",
385	+	"LongAdderTest",
386	+	"SplittableRandomTest",
387	+	"StampedLockTest",
388	+	"SubmissionPublisherTest",
389	+	"ThreadLocalRandom8Test",
390	+	};
391	+	addNamedTestClasses(suite, java8TestClassNames);
392	+	}
393	+
394	+	// Java9+ test classes
395	+	if (atLeastJava9()) {
396	+	String[] java9TestClassNames = {
397	+	// Currently empty, but expecting varhandle tests
398	+	};
399	+	addNamedTestClasses(suite, java9TestClassNames);
400	+	}
401	+
402	+	return suite;
403	+	}
404	+
405	+	/** Returns list of junit-style test method names in given class. */
406	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
407	+	Method[] methods = testClass.getDeclaredMethods();
408	+	ArrayList<String> names = new ArrayList<String>(methods.length);
409	+	for (Method method : methods) {
410	+	if (method.getName().startsWith("test")
411	+	&& Modifier.isPublic(method.getModifiers())
412	+	// method.getParameterCount() requires jdk8+
413	+	&& method.getParameterTypes().length == 0) {
414	+	names.add(method.getName());
415	+	}
416	+	}
417	+	return names;
418	+	}
419	+
420	+	/**
421	+	* Returns junit-style testSuite for the given test class, but
422	+	* parameterized by passing extra data to each test.
423	+	*/
424	+	public static <ExtraData> Test parameterizedTestSuite
425	+	(Class<? extends JSR166TestCase> testClass,
426	+	Class<ExtraData> dataClass,
427	+	ExtraData data) {
428	+	try {
429	+	TestSuite suite = new TestSuite();
430	+	Constructor c =
431	+	testClass.getDeclaredConstructor(dataClass, String.class);
432	+	for (String methodName : testMethodNames(testClass))
433	+	suite.addTest((Test) c.newInstance(data, methodName));
434	+	return suite;
435	+	} catch (Exception e) {
436	+	throw new Error(e);
437	+	}
438	+	}
439	+
440	+	/**
441	+	* Returns junit-style testSuite for the jdk8 extension of the
442	+	* given test class, but parameterized by passing extra data to
443	+	* each test.  Uses reflection to allow compilation in jdk7.
444	+	*/
445	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
446	+	(Class<? extends JSR166TestCase> testClass,
447	+	Class<ExtraData> dataClass,
448	+	ExtraData data) {
449	+	if (atLeastJava8()) {
450	+	String name = testClass.getName();
451	+	String name8 = name.replaceAll("Test$", "8Test");
452	+	if (name.equals(name8)) throw new Error(name);
453	+	try {
454	+	return (Test)
455	+	Class.forName(name8)
456	+	.getMethod("testSuite", new Class[] { dataClass })
457	+	.invoke(null, data);
458	+	} catch (Exception e) {
459	+	throw new Error(e);
460	+	}
461	+	} else {
462	+	return new TestSuite();
463	+	}
464	+
465		}
466
467	+	// Delays for timing-dependent tests, in milliseconds.
468
469		public static long SHORT_DELAY_MS;
470		public static long SMALL_DELAY_MS;
471		public static long MEDIUM_DELAY_MS;
472		public static long LONG_DELAY_MS;
473
246	–
474		/**
475		* Returns the shortest timed delay. This could
476		* be reimplemented to use for example a Property.
#	Line 252 | Line 479 | public class JSR166TestCase extends Test
479		return 50;
480		}
481
255	–
482		/**
483		* Sets delays as multiples of SHORT_DELAY.
484		*/
#	Line 260 | Line 486 | public class JSR166TestCase extends Test
486		SHORT_DELAY_MS = getShortDelay();
487		SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
488		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
489	<	LONG_DELAY_MS   = SHORT_DELAY_MS * 50;
489	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
490	>	}
491	>
492	>	/**
493	>	* Returns a timeout in milliseconds to be used in tests that
494	>	* verify that operations block or time out.
495	>	*/
496	>	long timeoutMillis() {
497	>	return SHORT_DELAY_MS / 4;
498	>	}
499	>
500	>	/**
501	>	* Returns a new Date instance representing a time at least
502	>	* delayMillis milliseconds in the future.
503	>	*/
504	>	Date delayedDate(long delayMillis) {
505	>	// Add 1 because currentTimeMillis is known to round into the past.
506	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
507		}
508
509		/**
#	Line 276 | Line 519 | public class JSR166TestCase extends Test
519		* the same test have no effect.
520		*/
521		public void threadRecordFailure(Throwable t) {
522	+	printAllStackTraces();
523		threadFailure.compareAndSet(null, t);
524		}
525
#	Line 283 | Line 527 | public class JSR166TestCase extends Test
527		setDelays();
528		}
529
530	+	void tearDownFail(String format, Object... args) {
531	+	String msg = toString() + ": " + String.format(format, args);
532	+	System.err.println(msg);
533	+	printAllStackTraces();
534	+	throw new AssertionFailedError(msg);
535	+	}
536	+
537		/**
538	+	* Extra checks that get done for all test cases.
539	+	*
540		* Triggers test case failure if any thread assertions have failed,
541		* by rethrowing, in the test harness thread, any exception recorded
542		* earlier by threadRecordFailure.
543	+	*
544	+	* Triggers test case failure if interrupt status is set in the main thread.
545		*/
546		public void tearDown() throws Exception {
547	<	Throwable t = threadFailure.get();
547	>	Throwable t = threadFailure.getAndSet(null);
548		if (t != null) {
549		if (t instanceof Error)
550		throw (Error) t;
#	Line 304 | Line 559 | public class JSR166TestCase extends Test
559		throw afe;
560		}
561		}
562	+
563	+	if (Thread.interrupted())
564	+	tearDownFail("interrupt status set in main thread");
565	+
566	+	checkForkJoinPoolThreadLeaks();
567	+	}
568	+
569	+	/**
570	+	* Finds missing try { ... } finally { joinPool(e); }
571	+	*/
572	+	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
573	+	Thread[] survivors = new Thread[7];
574	+	int count = Thread.enumerate(survivors);
575	+	for (int i = 0; i < count; i++) {
576	+	Thread thread = survivors[i];
577	+	String name = thread.getName();
578	+	if (name.startsWith("ForkJoinPool-")) {
579	+	// give thread some time to terminate
580	+	thread.join(LONG_DELAY_MS);
581	+	if (thread.isAlive())
582	+	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
583	+	thread);
584	+	}
585	+	}
586	+
587	+	if (!ForkJoinPool.commonPool()
588	+	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
589	+	tearDownFail("ForkJoin common pool thread stuck");
590		}
591
592		/**
#	Line 316 | Line 599 | public class JSR166TestCase extends Test
599		fail(reason);
600		} catch (AssertionFailedError t) {
601		threadRecordFailure(t);
602	<	fail(reason);
602	>	throw t;
603		}
604		}
605
#	Line 384 | Line 667 | public class JSR166TestCase extends Test
667		public void threadAssertEquals(Object x, Object y) {
668		try {
669		assertEquals(x, y);
670	<	} catch (AssertionFailedError t) {
671	<	threadRecordFailure(t);
672	<	throw t;
673	<	} catch (Throwable t) {
674	<	threadUnexpectedException(t);
670	>	} catch (AssertionFailedError fail) {
671	>	threadRecordFailure(fail);
672	>	throw fail;
673	>	} catch (Throwable fail) {
674	>	threadUnexpectedException(fail);
675		}
676		}
677
#	Line 400 | Line 683 | public class JSR166TestCase extends Test
683		public void threadAssertSame(Object x, Object y) {
684		try {
685		assertSame(x, y);
686	<	} catch (AssertionFailedError t) {
687	<	threadRecordFailure(t);
688	<	throw t;
686	>	} catch (AssertionFailedError fail) {
687	>	threadRecordFailure(fail);
688	>	throw fail;
689		}
690		}
691
#	Line 435 | Line 718 | public class JSR166TestCase extends Test
718		else {
719		AssertionFailedError afe =
720		new AssertionFailedError("unexpected exception: " + t);
721	<	t.initCause(t);
721	>	afe.initCause(t);
722		throw afe;
723		}
724		}
725
726		/**
727	+	* Delays, via Thread.sleep, for the given millisecond delay, but
728	+	* if the sleep is shorter than specified, may re-sleep or yield
729	+	* until time elapses.
730	+	*/
731	+	static void delay(long millis) throws InterruptedException {
732	+	long startTime = System.nanoTime();
733	+	long ns = millis * 1000 * 1000;
734	+	for (;;) {
735	+	if (millis > 0L)
736	+	Thread.sleep(millis);
737	+	else // too short to sleep
738	+	Thread.yield();
739	+	long d = ns - (System.nanoTime() - startTime);
740	+	if (d > 0L)
741	+	millis = d / (1000 * 1000);
742	+	else
743	+	break;
744	+	}
745	+	}
746	+
747	+	/**
748	+	* Allows use of try-with-resources with per-test thread pools.
749	+	*/
750	+	static class PoolCloser<T extends ExecutorService>
751	+	implements AutoCloseable {
752	+	public final T pool;
753	+	public PoolCloser(T pool) { this.pool = pool; }
754	+	public void close() { joinPool(pool); }
755	+	}
756	+
757	+	/**
758		* Waits out termination of a thread pool or fails doing so.
759		*/
760	<	public void joinPool(ExecutorService exec) {
760	>	static void joinPool(ExecutorService pool) {
761		try {
762	<	exec.shutdown();
763	<	assertTrue("ExecutorService did not terminate in a timely manner",
764	<	exec.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
762	>	pool.shutdown();
763	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS))
764	>	fail("ExecutorService " + pool +
765	>	" did not terminate in a timely manner");
766		} catch (SecurityException ok) {
767		// Allowed in case test doesn't have privs
768	<	} catch (InterruptedException ie) {
768	>	} catch (InterruptedException fail) {
769		fail("Unexpected InterruptedException");
770		}
771		}
772
773	+	/** Like Runnable, but with the freedom to throw anything */
774	+	interface Action { public void run() throws Throwable; }
775	+
776	+	/**
777	+	* Runs all the given actions in parallel, failing if any fail.
778	+	* Useful for running multiple variants of tests that are
779	+	* necessarily individually slow because they must block.
780	+	*/
781	+	void testInParallel(Action ... actions) {
782	+	try (PoolCloser<ExecutorService> poolCloser
783	+	= new PoolCloser<>(Executors.newCachedThreadPool())) {
784	+	ExecutorService pool = poolCloser.pool;
785	+	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
786	+	for (final Action action : actions)
787	+	futures.add(pool.submit(new CheckedRunnable() {
788	+	public void realRun() throws Throwable { action.run();}}));
789	+	for (Future<?> future : futures)
790	+	try {
791	+	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
792	+	} catch (ExecutionException ex) {
793	+	threadUnexpectedException(ex.getCause());
794	+	} catch (Exception ex) {
795	+	threadUnexpectedException(ex);
796	+	}
797	+	}
798	+	}
799	+
800	+	/**
801	+	* A debugging tool to print all stack traces, as jstack does.
802	+	* Uninteresting threads are filtered out.
803	+	*/
804	+	static void printAllStackTraces() {
805	+	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
806	+	System.err.println("------ stacktrace dump start ------");
807	+	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
808	+	String name = info.getThreadName();
809	+	if ("Signal Dispatcher".equals(name))
810	+	continue;
811	+	if ("Reference Handler".equals(name)
812	+	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
813	+	continue;
814	+	if ("Finalizer".equals(name)
815	+	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
816	+	continue;
817	+	System.err.print(info);
818	+	}
819	+	System.err.println("------ stacktrace dump end ------");
820	+	}
821	+
822	+	/**
823	+	* Checks that thread does not terminate within the default
824	+	* millisecond delay of {@code timeoutMillis()}.
825	+	*/
826	+	void assertThreadStaysAlive(Thread thread) {
827	+	assertThreadStaysAlive(thread, timeoutMillis());
828	+	}
829	+
830	+	/**
831	+	* Checks that thread does not terminate within the given millisecond delay.
832	+	*/
833	+	void assertThreadStaysAlive(Thread thread, long millis) {
834	+	try {
835	+	// No need to optimize the failing case via Thread.join.
836	+	delay(millis);
837	+	assertTrue(thread.isAlive());
838	+	} catch (InterruptedException fail) {
839	+	fail("Unexpected InterruptedException");
840	+	}
841	+	}
842	+
843	+	/**
844	+	* Checks that the threads do not terminate within the default
845	+	* millisecond delay of {@code timeoutMillis()}.
846	+	*/
847	+	void assertThreadsStayAlive(Thread... threads) {
848	+	assertThreadsStayAlive(timeoutMillis(), threads);
849	+	}
850	+
851	+	/**
852	+	* Checks that the threads do not terminate within the given millisecond delay.
853	+	*/
854	+	void assertThreadsStayAlive(long millis, Thread... threads) {
855	+	try {
856	+	// No need to optimize the failing case via Thread.join.
857	+	delay(millis);
858	+	for (Thread thread : threads)
859	+	assertTrue(thread.isAlive());
860	+	} catch (InterruptedException fail) {
861	+	fail("Unexpected InterruptedException");
862	+	}
863	+	}
864	+
865	+	/**
866	+	* Checks that future.get times out, with the default timeout of
867	+	* {@code timeoutMillis()}.
868	+	*/
869	+	void assertFutureTimesOut(Future future) {
870	+	assertFutureTimesOut(future, timeoutMillis());
871	+	}
872	+
873	+	/**
874	+	* Checks that future.get times out, with the given millisecond timeout.
875	+	*/
876	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
877	+	long startTime = System.nanoTime();
878	+	try {
879	+	future.get(timeoutMillis, MILLISECONDS);
880	+	shouldThrow();
881	+	} catch (TimeoutException success) {
882	+	} catch (Exception fail) {
883	+	threadUnexpectedException(fail);
884	+	} finally { future.cancel(true); }
885	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
886	+	}
887
888		/**
889		* Fails with message "should throw exception".
#	Line 495 | Line 924 | public class JSR166TestCase extends Test
924		public static final Integer m6  = new Integer(-6);
925		public static final Integer m10 = new Integer(-10);
926
498	–
927		/**
928		* Runs Runnable r with a security policy that permits precisely
929		* the specified permissions.  If there is no current security
#	Line 507 | Line 935 | public class JSR166TestCase extends Test
935		SecurityManager sm = System.getSecurityManager();
936		if (sm == null) {
937		r.run();
938	+	}
939	+	runWithSecurityManagerWithPermissions(r, permissions);
940	+	}
941	+
942	+	/**
943	+	* Runs Runnable r with a security policy that permits precisely
944	+	* the specified permissions.  If there is no current security
945	+	* manager, a temporary one is set for the duration of the
946	+	* Runnable.  We require that any security manager permit
947	+	* getPolicy/setPolicy.
948	+	*/
949	+	public void runWithSecurityManagerWithPermissions(Runnable r,
950	+	Permission... permissions) {
951	+	SecurityManager sm = System.getSecurityManager();
952	+	if (sm == null) {
953		Policy savedPolicy = Policy.getPolicy();
954		try {
955		Policy.setPolicy(permissivePolicy());
956		System.setSecurityManager(new SecurityManager());
957	<	runWithPermissions(r, permissions);
957	>	runWithSecurityManagerWithPermissions(r, permissions);
958		} finally {
959		System.setSecurityManager(null);
960		Policy.setPolicy(savedPolicy);
#	Line 559 | Line 1002 | public class JSR166TestCase extends Test
1002		return perms.implies(p);
1003		}
1004		public void refresh() {}
1005	+	public String toString() {
1006	+	List<Permission> ps = new ArrayList<Permission>();
1007	+	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1008	+	ps.add(e.nextElement());
1009	+	return "AdjustablePolicy with permissions " + ps;
1010	+	}
1011		}
1012
1013		/**
#	Line 586 | Line 1035 | public class JSR166TestCase extends Test
1035		*/
1036		void sleep(long millis) {
1037		try {
1038	<	Thread.sleep(millis);
1039	<	} catch (InterruptedException ie) {
1038	>	delay(millis);
1039	>	} catch (InterruptedException fail) {
1040		AssertionFailedError afe =
1041		new AssertionFailedError("Unexpected InterruptedException");
1042	<	afe.initCause(ie);
1042	>	afe.initCause(fail);
1043		throw afe;
1044		}
1045		}
1046
1047		/**
1048	<	* Sleeps until the timeout has elapsed, or interrupted.
600	<	* Does <em>NOT</em> throw InterruptedException.
601	<	*/
602	<	void sleepTillInterrupted(long timeoutMillis) {
603	<	try {
604	<	Thread.sleep(timeoutMillis);
605	<	} catch (InterruptedException wakeup) {}
606	<	}
607	<
608	<	/**
609	<	* Waits up to the specified number of milliseconds for the given
1048	>	* Spin-waits up to the specified number of milliseconds for the given
1049		* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1050		*/
1051		void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1052	<	long timeoutNanos = timeoutMillis * 1000L * 1000L;
614	<	long t0 = System.nanoTime();
1052	>	long startTime = System.nanoTime();
1053		for (;;) {
1054		Thread.State s = thread.getState();
1055		if (s == Thread.State.BLOCKED ||
1056		s == Thread.State.WAITING ||
1057	<	s == Thread.State.TIMED_WAITING ||
1058	<	System.nanoTime() - t0 > timeoutNanos)
1057	>	s == Thread.State.TIMED_WAITING)
1058	>	return;
1059	>	else if (s == Thread.State.TERMINATED)
1060	>	fail("Unexpected thread termination");
1061	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1062	>	threadAssertTrue(thread.isAlive());
1063		return;
1064	+	}
1065		Thread.yield();
1066		}
1067		}
1068
1069		/**
1070	+	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1071	+	* state: BLOCKED, WAITING, or TIMED_WAITING.
1072	+	*/
1073	+	void waitForThreadToEnterWaitState(Thread thread) {
1074	+	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1075	+	}
1076	+
1077	+	/**
1078		* Returns the number of milliseconds since time given by
1079		* startNanoTime, which must have been previously returned from a
1080	<	* call to {@link System.nanoTime()}.
1080	>	* call to {@link System#nanoTime()}.
1081		*/
1082	<	long millisElapsedSince(long startNanoTime) {
1082	>	static long millisElapsedSince(long startNanoTime) {
1083		return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1084		}
1085	<
1085	>
1086	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1087	>	//         long startTime = System.nanoTime();
1088	>	//         try {
1089	>	//             r.run();
1090	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1091	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1092	>	//             throw new AssertionFailedError("did not return promptly");
1093	>	//     }
1094	>
1095	>	//     void assertTerminatesPromptly(Runnable r) {
1096	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1097	>	//     }
1098	>
1099	>	/**
1100	>	* Checks that timed f.get() returns the expected value, and does not
1101	>	* wait for the timeout to elapse before returning.
1102	>	*/
1103	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1104	>	long startTime = System.nanoTime();
1105	>	try {
1106	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1107	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1108	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1109	>	throw new AssertionFailedError("timed get did not return promptly");
1110	>	}
1111	>
1112	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1113	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1114	>	}
1115	>
1116		/**
1117		* Returns a new started daemon Thread running the given runnable.
1118		*/
#	Line 650 | Line 1131 | public class JSR166TestCase extends Test
1131		void awaitTermination(Thread t, long timeoutMillis) {
1132		try {
1133		t.join(timeoutMillis);
1134	<	} catch (InterruptedException ie) {
1135	<	threadUnexpectedException(ie);
1134	>	} catch (InterruptedException fail) {
1135	>	threadUnexpectedException(fail);
1136		} finally {
1137	<	if (t.isAlive()) {
1137	>	if (t.getState() != Thread.State.TERMINATED) {
1138		t.interrupt();
1139		fail("Test timed out");
1140		}
1141		}
1142		}
1143
1144	+	/**
1145	+	* Waits for LONG_DELAY_MS milliseconds for the thread to
1146	+	* terminate (using {@link Thread#join(long)}), else interrupts
1147	+	* the thread (in the hope that it may terminate later) and fails.
1148	+	*/
1149	+	void awaitTermination(Thread t) {
1150	+	awaitTermination(t, LONG_DELAY_MS);
1151	+	}
1152	+
1153		// Some convenient Runnable classes
1154
1155		public abstract class CheckedRunnable implements Runnable {
#	Line 668 | Line 1158 | public class JSR166TestCase extends Test
1158		public final void run() {
1159		try {
1160		realRun();
1161	<	} catch (Throwable t) {
1162	<	threadUnexpectedException(t);
1161	>	} catch (Throwable fail) {
1162	>	threadUnexpectedException(fail);
1163		}
1164		}
1165		}
#	Line 722 | Line 1212 | public class JSR166TestCase extends Test
1212		realRun();
1213		threadShouldThrow("InterruptedException");
1214		} catch (InterruptedException success) {
1215	<	} catch (Throwable t) {
1216	<	threadUnexpectedException(t);
1215	>	threadAssertFalse(Thread.interrupted());
1216	>	} catch (Throwable fail) {
1217	>	threadUnexpectedException(fail);
1218		}
1219		}
1220		}
#	Line 734 | Line 1225 | public class JSR166TestCase extends Test
1225		public final T call() {
1226		try {
1227		return realCall();
1228	<	} catch (Throwable t) {
1229	<	threadUnexpectedException(t);
1228	>	} catch (Throwable fail) {
1229	>	threadUnexpectedException(fail);
1230		return null;
1231		}
1232		}
#	Line 751 | Line 1242 | public class JSR166TestCase extends Test
1242		threadShouldThrow("InterruptedException");
1243		return result;
1244		} catch (InterruptedException success) {
1245	<	} catch (Throwable t) {
1246	<	threadUnexpectedException(t);
1245	>	threadAssertFalse(Thread.interrupted());
1246	>	} catch (Throwable fail) {
1247	>	threadUnexpectedException(fail);
1248		}
1249		return null;
1250		}
#	Line 769 | Line 1261 | public class JSR166TestCase extends Test
1261		public static final String TEST_STRING = "a test string";
1262
1263		public static class StringTask implements Callable<String> {
1264	<	public String call() { return TEST_STRING; }
1264	>	final String value;
1265	>	public StringTask() { this(TEST_STRING); }
1266	>	public StringTask(String value) { this.value = value; }
1267	>	public String call() { return value; }
1268		}
1269
1270		public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
#	Line 782 | Line 1277 | public class JSR166TestCase extends Test
1277		}};
1278		}
1279
1280	+	public Runnable countDowner(final CountDownLatch latch) {
1281	+	return new CheckedRunnable() {
1282	+	public void realRun() throws InterruptedException {
1283	+	latch.countDown();
1284	+	}};
1285	+	}
1286	+
1287	+	public Runnable awaiter(final CountDownLatch latch) {
1288	+	return new CheckedRunnable() {
1289	+	public void realRun() throws InterruptedException {
1290	+	await(latch);
1291	+	}};
1292	+	}
1293	+
1294	+	public void await(CountDownLatch latch) {
1295	+	try {
1296	+	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1297	+	} catch (Throwable fail) {
1298	+	threadUnexpectedException(fail);
1299	+	}
1300	+	}
1301	+
1302	+	public void await(Semaphore semaphore) {
1303	+	try {
1304	+	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1305	+	} catch (Throwable fail) {
1306	+	threadUnexpectedException(fail);
1307	+	}
1308	+	}
1309	+
1310	+	//     /**
1311	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1312	+	//      */
1313	+	//     public void await(AtomicBoolean flag) {
1314	+	//         await(flag, LONG_DELAY_MS);
1315	+	//     }
1316	+
1317	+	//     /**
1318	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1319	+	//      */
1320	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1321	+	//         long startTime = System.nanoTime();
1322	+	//         while (!flag.get()) {
1323	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1324	+	//                 throw new AssertionFailedError("timed out");
1325	+	//             Thread.yield();
1326	+	//         }
1327	+	//     }
1328	+
1329		public static class NPETask implements Callable<String> {
1330		public String call() { throw new NullPointerException(); }
1331		}
#	Line 792 | Line 1336 | public class JSR166TestCase extends Test
1336
1337		public class ShortRunnable extends CheckedRunnable {
1338		protected void realRun() throws Throwable {
1339	<	Thread.sleep(SHORT_DELAY_MS);
1339	>	delay(SHORT_DELAY_MS);
1340		}
1341		}
1342
1343		public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1344		protected void realRun() throws InterruptedException {
1345	<	Thread.sleep(SHORT_DELAY_MS);
1345	>	delay(SHORT_DELAY_MS);
1346		}
1347		}
1348
1349		public class SmallRunnable extends CheckedRunnable {
1350		protected void realRun() throws Throwable {
1351	<	Thread.sleep(SMALL_DELAY_MS);
1351	>	delay(SMALL_DELAY_MS);
1352		}
1353		}
1354
1355		public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1356		protected void realRun() {
1357		try {
1358	<	Thread.sleep(SMALL_DELAY_MS);
1358	>	delay(SMALL_DELAY_MS);
1359		} catch (InterruptedException ok) {}
1360		}
1361		}
1362
1363		public class SmallCallable extends CheckedCallable {
1364		protected Object realCall() throws InterruptedException {
1365	<	Thread.sleep(SMALL_DELAY_MS);
1365	>	delay(SMALL_DELAY_MS);
1366		return Boolean.TRUE;
1367		}
1368		}
1369
1370		public class MediumRunnable extends CheckedRunnable {
1371		protected void realRun() throws Throwable {
1372	<	Thread.sleep(MEDIUM_DELAY_MS);
1372	>	delay(MEDIUM_DELAY_MS);
1373		}
1374		}
1375
1376		public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1377		protected void realRun() throws InterruptedException {
1378	<	Thread.sleep(MEDIUM_DELAY_MS);
1378	>	delay(MEDIUM_DELAY_MS);
1379		}
1380		}
1381
#	Line 839 | Line 1383 | public class JSR166TestCase extends Test
1383		return new CheckedRunnable() {
1384		protected void realRun() {
1385		try {
1386	<	Thread.sleep(timeoutMillis);
1386	>	delay(timeoutMillis);
1387		} catch (InterruptedException ok) {}
1388		}};
1389		}
#	Line 847 | Line 1391 | public class JSR166TestCase extends Test
1391		public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1392		protected void realRun() {
1393		try {
1394	<	Thread.sleep(MEDIUM_DELAY_MS);
1394	>	delay(MEDIUM_DELAY_MS);
1395		} catch (InterruptedException ok) {}
1396		}
1397		}
#	Line 855 | Line 1399 | public class JSR166TestCase extends Test
1399		public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1400		protected void realRun() {
1401		try {
1402	<	Thread.sleep(LONG_DELAY_MS);
1402	>	delay(LONG_DELAY_MS);
1403		} catch (InterruptedException ok) {}
1404		}
1405		}
#	Line 879 | Line 1423 | public class JSR166TestCase extends Test
1423		public boolean isDone() { return done; }
1424		public void run() {
1425		try {
1426	<	Thread.sleep(timeoutMillis);
1426	>	delay(timeoutMillis);
1427		done = true;
1428		} catch (InterruptedException ok) {}
1429		}
#	Line 890 | Line 1434 | public class JSR166TestCase extends Test
1434		public volatile boolean done = false;
1435		public void run() {
1436		try {
1437	<	Thread.sleep(SHORT_DELAY_MS);
1437	>	delay(SHORT_DELAY_MS);
1438		done = true;
1439		} catch (InterruptedException ok) {}
1440		}
#	Line 900 | Line 1444 | public class JSR166TestCase extends Test
1444		public volatile boolean done = false;
1445		public void run() {
1446		try {
1447	<	Thread.sleep(SMALL_DELAY_MS);
1447	>	delay(SMALL_DELAY_MS);
1448		done = true;
1449		} catch (InterruptedException ok) {}
1450		}
#	Line 910 | Line 1454 | public class JSR166TestCase extends Test
1454		public volatile boolean done = false;
1455		public void run() {
1456		try {
1457	<	Thread.sleep(MEDIUM_DELAY_MS);
1457	>	delay(MEDIUM_DELAY_MS);
1458		done = true;
1459		} catch (InterruptedException ok) {}
1460		}
#	Line 920 | Line 1464 | public class JSR166TestCase extends Test
1464		public volatile boolean done = false;
1465		public void run() {
1466		try {
1467	<	Thread.sleep(LONG_DELAY_MS);
1467	>	delay(LONG_DELAY_MS);
1468		done = true;
1469		} catch (InterruptedException ok) {}
1470		}
#	Line 937 | Line 1481 | public class JSR166TestCase extends Test
1481		public volatile boolean done = false;
1482		public Object call() {
1483		try {
1484	<	Thread.sleep(SMALL_DELAY_MS);
1484	>	delay(SMALL_DELAY_MS);
1485		done = true;
1486		} catch (InterruptedException ok) {}
1487		return Boolean.TRUE;
#	Line 950 | Line 1494 | public class JSR166TestCase extends Test
1494		public abstract class CheckedRecursiveAction extends RecursiveAction {
1495		protected abstract void realCompute() throws Throwable;
1496
1497	<	public final void compute() {
1497	>	@Override protected final void compute() {
1498		try {
1499		realCompute();
1500	<	} catch (Throwable t) {
1501	<	threadUnexpectedException(t);
1500	>	} catch (Throwable fail) {
1501	>	threadUnexpectedException(fail);
1502		}
1503		}
1504		}
#	Line 965 | Line 1509 | public class JSR166TestCase extends Test
1509		public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1510		protected abstract T realCompute() throws Throwable;
1511
1512	<	public final T compute() {
1512	>	@Override protected final T compute() {
1513		try {
1514		return realCompute();
1515	<	} catch (Throwable t) {
1516	<	threadUnexpectedException(t);
1515	>	} catch (Throwable fail) {
1516	>	threadUnexpectedException(fail);
1517		return null;
1518		}
1519		}
#	Line 984 | Line 1528 | public class JSR166TestCase extends Test
1528		}
1529
1530		/**
1531	<	* A CyclicBarrier that fails with AssertionFailedErrors instead
1532	<	* of throwing checked exceptions.
1531	>	* A CyclicBarrier that uses timed await and fails with
1532	>	* AssertionFailedErrors instead of throwing checked exceptions.
1533		*/
1534		public class CheckedBarrier extends CyclicBarrier {
1535		public CheckedBarrier(int parties) { super(parties); }
1536
1537		public int await() {
1538		try {
1539	<	return super.await();
1540	<	} catch (Exception e) {
1539	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1540	>	} catch (TimeoutException timedOut) {
1541	>	throw new AssertionFailedError("timed out");
1542	>	} catch (Exception fail) {
1543		AssertionFailedError afe =
1544	<	new AssertionFailedError("Unexpected exception: " + e);
1545	<	afe.initCause(e);
1544	>	new AssertionFailedError("Unexpected exception: " + fail);
1545	>	afe.initCause(fail);
1546		throw afe;
1547		}
1548		}
1549		}
1550
1551	+	void checkEmpty(BlockingQueue q) {
1552	+	try {
1553	+	assertTrue(q.isEmpty());
1554	+	assertEquals(0, q.size());
1555	+	assertNull(q.peek());
1556	+	assertNull(q.poll());
1557	+	assertNull(q.poll(0, MILLISECONDS));
1558	+	assertEquals(q.toString(), "[]");
1559	+	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1560	+	assertFalse(q.iterator().hasNext());
1561	+	try {
1562	+	q.element();
1563	+	shouldThrow();
1564	+	} catch (NoSuchElementException success) {}
1565	+	try {
1566	+	q.iterator().next();
1567	+	shouldThrow();
1568	+	} catch (NoSuchElementException success) {}
1569	+	try {
1570	+	q.remove();
1571	+	shouldThrow();
1572	+	} catch (NoSuchElementException success) {}
1573	+	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1574	+	}
1575	+
1576	+	void assertSerialEquals(Object x, Object y) {
1577	+	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1578	+	}
1579	+
1580	+	void assertNotSerialEquals(Object x, Object y) {
1581	+	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1582	+	}
1583	+
1584	+	byte[] serialBytes(Object o) {
1585	+	try {
1586	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1587	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1588	+	oos.writeObject(o);
1589	+	oos.flush();
1590	+	oos.close();
1591	+	return bos.toByteArray();
1592	+	} catch (Throwable fail) {
1593	+	threadUnexpectedException(fail);
1594	+	return new byte[0];
1595	+	}
1596	+	}
1597	+
1598	+	@SuppressWarnings("unchecked")
1599	+	<T> T serialClone(T o) {
1600	+	try {
1601	+	ObjectInputStream ois = new ObjectInputStream
1602	+	(new ByteArrayInputStream(serialBytes(o)));
1603	+	T clone = (T) ois.readObject();
1604	+	assertSame(o.getClass(), clone.getClass());
1605	+	return clone;
1606	+	} catch (Throwable fail) {
1607	+	threadUnexpectedException(fail);
1608	+	return null;
1609	+	}
1610	+	}
1611	+
1612	+	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1613	+	Runnable... throwingActions) {
1614	+	for (Runnable throwingAction : throwingActions) {
1615	+	boolean threw = false;
1616	+	try { throwingAction.run(); }
1617	+	catch (Throwable t) {
1618	+	threw = true;
1619	+	if (!expectedExceptionClass.isInstance(t)) {
1620	+	AssertionFailedError afe =
1621	+	new AssertionFailedError
1622	+	("Expected " + expectedExceptionClass.getName() +
1623	+	", got " + t.getClass().getName());
1624	+	afe.initCause(t);
1625	+	threadUnexpectedException(afe);
1626	+	}
1627	+	}
1628	+	if (!threw)
1629	+	shouldThrow(expectedExceptionClass.getName());
1630	+	}
1631	+	}
1632	+
1633	+	public void assertIteratorExhausted(Iterator<?> it) {
1634	+	try {
1635	+	it.next();
1636	+	shouldThrow();
1637	+	} catch (NoSuchElementException success) {}
1638	+	assertFalse(it.hasNext());
1639	+	}
1640		}

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