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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.153 by jsr166, Sat Oct 3 19:37:43 2015 UTC vs.
Revision 1.251 by jsr166, Wed Dec 12 16:59:55 2018 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by Doug Lea with assistance from members of JCP JSR-166
3	<	* Expert Group and released to the public domain, as explained at
2	>	* Written by Doug Lea and Martin Buchholz with assistance from
3	>	* members of JCP JSR-166 Expert Group and released to the public
4	>	* domain, as explained at
5		* http://creativecommons.org/publicdomain/zero/1.0/
6		* Other contributors include Andrew Wright, Jeffrey Hayes,
7		* Pat Fisher, Mike Judd.
8		*/
9
10	+	/*
11	+	* @test
12	+	* @summary JSR-166 tck tests, in a number of variations.
13	+	*          The first is the conformance testing variant,
14	+	*          while others also test implementation details.
15	+	* @build *
16	+	* @modules java.management
17	+	* @run junit/othervm/timeout=1000 JSR166TestCase
18	+	* @run junit/othervm/timeout=1000
19	+	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
20	+	*      --add-opens java.base/java.lang=ALL-UNNAMED
21	+	*      -Djsr166.testImplementationDetails=true
22	+	*      JSR166TestCase
23	+	* @run junit/othervm/timeout=1000
24	+	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
25	+	*      --add-opens java.base/java.lang=ALL-UNNAMED
26	+	*      -Djsr166.testImplementationDetails=true
27	+	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=0
28	+	*      JSR166TestCase
29	+	* @run junit/othervm/timeout=1000
30	+	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
31	+	*      --add-opens java.base/java.lang=ALL-UNNAMED
32	+	*      -Djsr166.testImplementationDetails=true
33	+	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=1
34	+	*      -Djava.util.secureRandomSeed=true
35	+	*      JSR166TestCase
36	+	* @run junit/othervm/timeout=1000/policy=tck.policy
37	+	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
38	+	*      --add-opens java.base/java.lang=ALL-UNNAMED
39	+	*      -Djsr166.testImplementationDetails=true
40	+	*      JSR166TestCase
41	+	*/
42	+
43		import static java.util.concurrent.TimeUnit.MILLISECONDS;
44	+	import static java.util.concurrent.TimeUnit.MINUTES;
45		import static java.util.concurrent.TimeUnit.NANOSECONDS;
46
47		import java.io.ByteArrayInputStream;
#	Line 28 | Line 63 | import java.security.ProtectionDomain;
63		import java.security.SecurityPermission;
64		import java.util.ArrayList;
65		import java.util.Arrays;
66	+	import java.util.Collection;
67	+	import java.util.Collections;
68		import java.util.Date;
69	+	import java.util.Deque;
70		import java.util.Enumeration;
71	+	import java.util.HashSet;
72		import java.util.Iterator;
73		import java.util.List;
74		import java.util.NoSuchElementException;
75		import java.util.PropertyPermission;
76	+	import java.util.Set;
77		import java.util.concurrent.BlockingQueue;
78		import java.util.concurrent.Callable;
79		import java.util.concurrent.CountDownLatch;
80		import java.util.concurrent.CyclicBarrier;
81		import java.util.concurrent.ExecutionException;
82	+	import java.util.concurrent.Executor;
83		import java.util.concurrent.Executors;
84		import java.util.concurrent.ExecutorService;
85		import java.util.concurrent.ForkJoinPool;
86		import java.util.concurrent.Future;
87	+	import java.util.concurrent.FutureTask;
88		import java.util.concurrent.RecursiveAction;
89		import java.util.concurrent.RecursiveTask;
90	+	import java.util.concurrent.RejectedExecutionException;
91		import java.util.concurrent.RejectedExecutionHandler;
92		import java.util.concurrent.Semaphore;
93	+	import java.util.concurrent.ScheduledExecutorService;
94	+	import java.util.concurrent.ScheduledFuture;
95	+	import java.util.concurrent.SynchronousQueue;
96		import java.util.concurrent.ThreadFactory;
97	+	import java.util.concurrent.ThreadLocalRandom;
98		import java.util.concurrent.ThreadPoolExecutor;
99	+	import java.util.concurrent.TimeUnit;
100		import java.util.concurrent.TimeoutException;
101	+	import java.util.concurrent.atomic.AtomicBoolean;
102		import java.util.concurrent.atomic.AtomicReference;
103		import java.util.regex.Pattern;
104
56	–	import junit.framework.AssertionFailedError;
105		import junit.framework.Test;
106		import junit.framework.TestCase;
107		import junit.framework.TestResult;
#	Line 69 | Line 117 | import junit.framework.TestSuite;
117		*
118		* <ol>
119		*
120	<	* <li>All assertions in code running in generated threads must use
121	<	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
122	<	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
123	<	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
124	<	* particularly recommended) for other code to use these forms too.
125	<	* Only the most typically used JUnit assertion methods are defined
126	<	* this way, but enough to live with.
120	>	* <li>All code not running in the main test thread (manually spawned threads
121	>	* or the common fork join pool) must be checked for failure (and completion!).
122	>	* Mechanisms that can be used to ensure this are:
123	>	*   <ol>
124	>	*   <li>Signalling via a synchronizer like AtomicInteger or CountDownLatch
125	>	*    that the task completed normally, which is checked before returning from
126	>	*    the test method in the main thread.
127	>	*   <li>Using the forms {@link #threadFail}, {@link #threadAssertTrue},
128	>	*    or {@link #threadAssertNull}, (not {@code fail}, {@code assertTrue}, etc.)
129	>	*    Only the most typically used JUnit assertion methods are defined
130	>	*    this way, but enough to live with.
131	>	*   <li>Recording failure explicitly using {@link #threadUnexpectedException}
132	>	*    or {@link #threadRecordFailure}.
133	>	*   <li>Using a wrapper like CheckedRunnable that uses one the mechanisms above.
134	>	*   </ol>
135		*
136		* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
137		* to invoke {@code super.setUp} and {@code super.tearDown} within
#	Line 108 | Line 164 | import junit.framework.TestSuite;
164		* methods as there are exceptions the method can throw. Sometimes
165		* there are multiple tests per JSR166 method when the different
166		* "normal" behaviors differ significantly. And sometimes testcases
167	<	* cover multiple methods when they cannot be tested in
112	<	* isolation.
167	>	* cover multiple methods when they cannot be tested in isolation.
168		*
169		* <li>The documentation style for testcases is to provide as javadoc
170		* a simple sentence or two describing the property that the testcase
#	Line 172 | Line 227 | public class JSR166TestCase extends Test
227		private static final int suiteRuns =
228		Integer.getInteger("jsr166.suiteRuns", 1);
229
230	+	/**
231	+	* Returns the value of the system property, or NaN if not defined.
232	+	*/
233	+	private static float systemPropertyValue(String name) {
234	+	String floatString = System.getProperty(name);
235	+	if (floatString == null)
236	+	return Float.NaN;
237	+	try {
238	+	return Float.parseFloat(floatString);
239	+	} catch (NumberFormatException ex) {
240	+	throw new IllegalArgumentException(
241	+	String.format("Bad float value in system property %s=%s",
242	+	name, floatString));
243	+	}
244	+	}
245	+
246	+	/**
247	+	* The scaling factor to apply to standard delays used in tests.
248	+	* May be initialized from any of:
249	+	* - the "jsr166.delay.factor" system property
250	+	* - the "test.timeout.factor" system property (as used by jtreg)
251	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
252	+	* - hard-coded fuzz factor when using a known slowpoke VM
253	+	*/
254	+	private static final float delayFactor = delayFactor();
255	+
256	+	private static float delayFactor() {
257	+	float x;
258	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
259	+	return x;
260	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
261	+	return x;
262	+	String prop = System.getProperty("java.vm.version");
263	+	if (prop != null && prop.matches(".*debug.*"))
264	+	return 4.0f; // How much slower is fastdebug than product?!
265	+	return 1.0f;
266	+	}
267	+
268		public JSR166TestCase() { super(); }
269		public JSR166TestCase(String name) { super(name); }
270
#	Line 187 | Line 280 | public class JSR166TestCase extends Test
280		return (regex == null) ? null : Pattern.compile(regex);
281		}
282
283	+	// Instrumentation to debug very rare, but very annoying hung test runs.
284	+	static volatile TestCase currentTestCase;
285	+	// static volatile int currentRun = 0;
286	+	static {
287	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
288	+	// Avoid spurious reports with enormous runsPerTest.
289	+	// A single test case run should never take more than 1 second.
290	+	// But let's cap it at the high end too ...
291	+	final int timeoutMinutes =
292	+	Math.min(15, Math.max(runsPerTest / 60, 1));
293	+	for (TestCase lastTestCase = currentTestCase;;) {
294	+	try { MINUTES.sleep(timeoutMinutes); }
295	+	catch (InterruptedException unexpected) { break; }
296	+	if (lastTestCase == currentTestCase) {
297	+	System.err.printf(
298	+	"Looks like we're stuck running test: %s%n",
299	+	lastTestCase);
300	+	//                     System.err.printf(
301	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
302	+	//                         lastTestCase, currentRun, runsPerTest);
303	+	//                     System.err.println("availableProcessors=" +
304	+	//                         Runtime.getRuntime().availableProcessors());
305	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
306	+	dumpTestThreads();
307	+	// one stack dump is probably enough; more would be spam
308	+	break;
309	+	}
310	+	lastTestCase = currentTestCase;
311	+	}}};
312	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
313	+	thread.setDaemon(true);
314	+	thread.start();
315	+	}
316	+
317	+	//     public static String cpuModel() {
318	+	//         try {
319	+	//             java.util.regex.Matcher matcher
320	+	//               = Pattern.compile("model name\\s*: (.*)")
321	+	//                 .matcher(new String(
322	+	//                     java.nio.file.Files.readAllBytes(
323	+	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
324	+	//             matcher.find();
325	+	//             return matcher.group(1);
326	+	//         } catch (Exception ex) { return null; }
327	+	//     }
328	+
329		public void runBare() throws Throwable {
330	+	currentTestCase = this;
331		if (methodFilter == null
332		|| methodFilter.matcher(toString()).find())
333		super.runBare();
#	Line 195 | Line 335 | public class JSR166TestCase extends Test
335
336		protected void runTest() throws Throwable {
337		for (int i = 0; i < runsPerTest; i++) {
338	+	// currentRun = i;
339		if (profileTests)
340		runTestProfiled();
341		else
#	Line 223 | Line 364 | public class JSR166TestCase extends Test
364		main(suite(), args);
365		}
366
367	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
368	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
369	+	long runTime;
370	+	public void startTest(Test test) {}
371	+	protected void printHeader(long runTime) {
372	+	this.runTime = runTime; // defer printing for later
373	+	}
374	+	protected void printFooter(TestResult result) {
375	+	if (result.wasSuccessful()) {
376	+	getWriter().println("OK (" + result.runCount() + " tests)"
377	+	+ "  Time: " + elapsedTimeAsString(runTime));
378	+	} else {
379	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
380	+	super.printFooter(result);
381	+	}
382	+	}
383	+	}
384	+
385	+	/**
386	+	* Returns a TestRunner that doesn't bother with unnecessary
387	+	* fluff, like printing a "." for each test case.
388	+	*/
389	+	static junit.textui.TestRunner newPithyTestRunner() {
390	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
391	+	runner.setPrinter(new PithyResultPrinter(System.out));
392	+	return runner;
393	+	}
394	+
395		/**
396		* Runs all unit tests in the given test suite.
397		* Actual behavior influenced by jsr166.* system properties.
#	Line 234 | Line 403 | public class JSR166TestCase extends Test
403		System.setSecurityManager(new SecurityManager());
404		}
405		for (int i = 0; i < suiteRuns; i++) {
406	<	TestResult result = junit.textui.TestRunner.run(suite);
406	>	TestResult result = newPithyTestRunner().doRun(suite);
407		if (!result.wasSuccessful())
408		System.exit(1);
409		System.gc();
#	Line 260 | Line 429 | public class JSR166TestCase extends Test
429		for (String testClassName : testClassNames) {
430		try {
431		Class<?> testClass = Class.forName(testClassName);
432	<	Method m = testClass.getDeclaredMethod("suite",
264	<	new Class<?>[0]);
432	>	Method m = testClass.getDeclaredMethod("suite");
433		suite.addTest(newTestSuite((Test)m.invoke(null)));
434	<	} catch (Exception e) {
435	<	throw new Error("Missing test class", e);
434	>	} catch (ReflectiveOperationException e) {
435	>	throw new AssertionError("Missing test class", e);
436		}
437		}
438		}
#	Line 286 | Line 454 | public class JSR166TestCase extends Test
454		}
455		}
456
457	<	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
458	<	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
459	<	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
460	<	public static boolean atLeastJava9() {
461	<	return JAVA_CLASS_VERSION >= 53.0
462	<	// 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	<	}
457	>	public static boolean atLeastJava6()  { return JAVA_CLASS_VERSION >= 50.0; }
458	>	public static boolean atLeastJava7()  { return JAVA_CLASS_VERSION >= 51.0; }
459	>	public static boolean atLeastJava8()  { return JAVA_CLASS_VERSION >= 52.0; }
460	>	public static boolean atLeastJava9()  { return JAVA_CLASS_VERSION >= 53.0; }
461	>	public static boolean atLeastJava10() { return JAVA_CLASS_VERSION >= 54.0; }
462	>	public static boolean atLeastJava11() { return JAVA_CLASS_VERSION >= 55.0; }
463
464		/**
465		* Collects all JSR166 unit tests as one suite.
#	Line 318 | Line 480 | public class JSR166TestCase extends Test
480		AbstractQueuedLongSynchronizerTest.suite(),
481		ArrayBlockingQueueTest.suite(),
482		ArrayDequeTest.suite(),
483	+	ArrayListTest.suite(),
484		AtomicBooleanTest.suite(),
485		AtomicIntegerArrayTest.suite(),
486		AtomicIntegerFieldUpdaterTest.suite(),
#	Line 340 | Line 503 | public class JSR166TestCase extends Test
503		CopyOnWriteArrayListTest.suite(),
504		CopyOnWriteArraySetTest.suite(),
505		CountDownLatchTest.suite(),
506	+	CountedCompleterTest.suite(),
507		CyclicBarrierTest.suite(),
508		DelayQueueTest.suite(),
509		EntryTest.suite(),
#	Line 368 | Line 532 | public class JSR166TestCase extends Test
532		TreeMapTest.suite(),
533		TreeSetTest.suite(),
534		TreeSubMapTest.suite(),
535	<	TreeSubSetTest.suite());
535	>	TreeSubSetTest.suite(),
536	>	VectorTest.suite());
537
538		// Java8+ test classes
539		if (atLeastJava8()) {
540		String[] java8TestClassNames = {
541	+	"ArrayDeque8Test",
542		"Atomic8Test",
543		"CompletableFutureTest",
544		"ConcurrentHashMap8Test",
545	<	"CountedCompleterTest",
545	>	"CountedCompleter8Test",
546		"DoubleAccumulatorTest",
547		"DoubleAdderTest",
548		"ForkJoinPool8Test",
549		"ForkJoinTask8Test",
550	+	"HashMapTest",
551	+	"LinkedBlockingDeque8Test",
552	+	"LinkedBlockingQueue8Test",
553	+	"LinkedHashMapTest",
554		"LongAccumulatorTest",
555		"LongAdderTest",
556		"SplittableRandomTest",
557		"StampedLockTest",
558		"SubmissionPublisherTest",
559		"ThreadLocalRandom8Test",
560	+	"TimeUnit8Test",
561		};
562		addNamedTestClasses(suite, java8TestClassNames);
563		}
#	Line 394 | Line 565 | public class JSR166TestCase extends Test
565		// Java9+ test classes
566		if (atLeastJava9()) {
567		String[] java9TestClassNames = {
568	<	// Currently empty, but expecting varhandle tests
568	>	"AtomicBoolean9Test",
569	>	"AtomicInteger9Test",
570	>	"AtomicIntegerArray9Test",
571	>	"AtomicLong9Test",
572	>	"AtomicLongArray9Test",
573	>	"AtomicReference9Test",
574	>	"AtomicReferenceArray9Test",
575	>	"ExecutorCompletionService9Test",
576	>	"ForkJoinPool9Test",
577		};
578		addNamedTestClasses(suite, java9TestClassNames);
579		}
#	Line 405 | Line 584 | public class JSR166TestCase extends Test
584		/** Returns list of junit-style test method names in given class. */
585		public static ArrayList<String> testMethodNames(Class<?> testClass) {
586		Method[] methods = testClass.getDeclaredMethods();
587	<	ArrayList<String> names = new ArrayList<String>(methods.length);
587	>	ArrayList<String> names = new ArrayList<>(methods.length);
588		for (Method method : methods) {
589		if (method.getName().startsWith("test")
590		&& Modifier.isPublic(method.getModifiers())
#	Line 432 | Line 611 | public class JSR166TestCase extends Test
611		for (String methodName : testMethodNames(testClass))
612		suite.addTest((Test) c.newInstance(data, methodName));
613		return suite;
614	<	} catch (Exception e) {
615	<	throw new Error(e);
614	>	} catch (ReflectiveOperationException e) {
615	>	throw new AssertionError(e);
616		}
617		}
618
#	Line 449 | Line 628 | public class JSR166TestCase extends Test
628		if (atLeastJava8()) {
629		String name = testClass.getName();
630		String name8 = name.replaceAll("Test$", "8Test");
631	<	if (name.equals(name8)) throw new Error(name);
631	>	if (name.equals(name8)) throw new AssertionError(name);
632		try {
633		return (Test)
634		Class.forName(name8)
635	<	.getMethod("testSuite", new Class[] { dataClass })
635	>	.getMethod("testSuite", dataClass)
636		.invoke(null, data);
637	<	} catch (Exception e) {
638	<	throw new Error(e);
637	>	} catch (ReflectiveOperationException e) {
638	>	throw new AssertionError(e);
639		}
640		} else {
641		return new TestSuite();
642		}
464	–
643		}
644
645		// Delays for timing-dependent tests, in milliseconds.
#	Line 471 | Line 649 | public class JSR166TestCase extends Test
649		public static long MEDIUM_DELAY_MS;
650		public static long LONG_DELAY_MS;
651
652	+	private static final long RANDOM_TIMEOUT;
653	+	private static final long RANDOM_EXPIRED_TIMEOUT;
654	+	private static final TimeUnit RANDOM_TIMEUNIT;
655	+	static {
656	+	ThreadLocalRandom rnd = ThreadLocalRandom.current();
657	+	long[] timeouts = { Long.MIN_VALUE, -1, 0, 1, Long.MAX_VALUE };
658	+	RANDOM_TIMEOUT = timeouts[rnd.nextInt(timeouts.length)];
659	+	RANDOM_EXPIRED_TIMEOUT = timeouts[rnd.nextInt(3)];
660	+	TimeUnit[] timeUnits = TimeUnit.values();
661	+	RANDOM_TIMEUNIT = timeUnits[rnd.nextInt(timeUnits.length)];
662	+	}
663	+
664		/**
665	<	* Returns the shortest timed delay. This could
666	<	* be reimplemented to use for example a Property.
665	>	* Returns a timeout for use when any value at all will do.
666	>	*/
667	>	static long randomTimeout() { return RANDOM_TIMEOUT; }
668	>
669	>	/**
670	>	* Returns a timeout that means "no waiting", i.e. not positive.
671	>	*/
672	>	static long randomExpiredTimeout() { return RANDOM_EXPIRED_TIMEOUT; }
673	>
674	>	/**
675	>	* Returns a random non-null TimeUnit.
676	>	*/
677	>	static TimeUnit randomTimeUnit() { return RANDOM_TIMEUNIT; }
678	>
679	>	/**
680	>	* Returns the shortest timed delay. This can be scaled up for
681	>	* slow machines using the jsr166.delay.factor system property,
682	>	* or via jtreg's -timeoutFactor: flag.
683	>	* http://openjdk.java.net/jtreg/command-help.html
684		*/
685		protected long getShortDelay() {
686	<	return 50;
686	>	return (long) (50 * delayFactor);
687		}
688
689		/**
#	Line 489 | Line 696 | public class JSR166TestCase extends Test
696		LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
697		}
698
699	+	private static final long TIMEOUT_DELAY_MS
700	+	= (long) (12.0 * Math.cbrt(delayFactor));
701	+
702		/**
703	<	* Returns a timeout in milliseconds to be used in tests that
704	<	* verify that operations block or time out.
703	>	* Returns a timeout in milliseconds to be used in tests that verify
704	>	* that operations block or time out.  We want this to be longer
705	>	* than the OS scheduling quantum, but not too long, so don't scale
706	>	* linearly with delayFactor; we use "crazy" cube root instead.
707		*/
708	<	long timeoutMillis() {
709	<	return SHORT_DELAY_MS / 4;
708	>	static long timeoutMillis() {
709	>	return TIMEOUT_DELAY_MS;
710		}
711
712		/**
#	Line 510 | Line 722 | public class JSR166TestCase extends Test
722		* The first exception encountered if any threadAssertXXX method fails.
723		*/
724		private final AtomicReference<Throwable> threadFailure
725	<	= new AtomicReference<Throwable>(null);
725	>	= new AtomicReference<>(null);
726
727		/**
728		* Records an exception so that it can be rethrown later in the test
#	Line 519 | Line 731 | public class JSR166TestCase extends Test
731		* the same test have no effect.
732		*/
733		public void threadRecordFailure(Throwable t) {
734	<	printAllStackTraces();
734	>	System.err.println(t);
735	>	dumpTestThreads();
736		threadFailure.compareAndSet(null, t);
737		}
738
#	Line 530 | Line 743 | public class JSR166TestCase extends Test
743		void tearDownFail(String format, Object... args) {
744		String msg = toString() + ": " + String.format(format, args);
745		System.err.println(msg);
746	<	printAllStackTraces();
747	<	throw new AssertionFailedError(msg);
746	>	dumpTestThreads();
747	>	throw new AssertionError(msg);
748		}
749
750		/**
#	Line 552 | Line 765 | public class JSR166TestCase extends Test
765		throw (RuntimeException) t;
766		else if (t instanceof Exception)
767		throw (Exception) t;
768	<	else {
769	<	AssertionFailedError afe =
557	<	new AssertionFailedError(t.toString());
558	<	afe.initCause(t);
559	<	throw afe;
560	<	}
768	>	else
769	>	throw new AssertionError(t.toString(), t);
770		}
771
772		if (Thread.interrupted())
#	Line 567 | Line 776 | public class JSR166TestCase extends Test
776		}
777
778		/**
779	<	* Finds missing try { ... } finally { joinPool(e); }
779	>	* Finds missing PoolCleaners
780		*/
781		void checkForkJoinPoolThreadLeaks() throws InterruptedException {
782		Thread[] survivors = new Thread[7];
#	Line 591 | Line 800 | public class JSR166TestCase extends Test
800
801		/**
802		* Just like fail(reason), but additionally recording (using
803	<	* threadRecordFailure) any AssertionFailedError thrown, so that
804	<	* the current testcase will fail.
803	>	* threadRecordFailure) any AssertionError thrown, so that the
804	>	* current testcase will fail.
805		*/
806		public void threadFail(String reason) {
807		try {
808		fail(reason);
809	<	} catch (AssertionFailedError t) {
810	<	threadRecordFailure(t);
811	<	throw t;
809	>	} catch (AssertionError fail) {
810	>	threadRecordFailure(fail);
811	>	throw fail;
812		}
813		}
814
815		/**
816		* Just like assertTrue(b), but additionally recording (using
817	<	* threadRecordFailure) any AssertionFailedError thrown, so that
818	<	* the current testcase will fail.
817	>	* threadRecordFailure) any AssertionError thrown, so that the
818	>	* current testcase will fail.
819		*/
820		public void threadAssertTrue(boolean b) {
821		try {
822		assertTrue(b);
823	<	} catch (AssertionFailedError t) {
824	<	threadRecordFailure(t);
825	<	throw t;
823	>	} catch (AssertionError fail) {
824	>	threadRecordFailure(fail);
825	>	throw fail;
826		}
827		}
828
829		/**
830		* Just like assertFalse(b), but additionally recording (using
831	<	* threadRecordFailure) any AssertionFailedError thrown, so that
832	<	* the current testcase will fail.
831	>	* threadRecordFailure) any AssertionError thrown, so that the
832	>	* current testcase will fail.
833		*/
834		public void threadAssertFalse(boolean b) {
835		try {
836		assertFalse(b);
837	<	} catch (AssertionFailedError t) {
838	<	threadRecordFailure(t);
839	<	throw t;
837	>	} catch (AssertionError fail) {
838	>	threadRecordFailure(fail);
839	>	throw fail;
840		}
841		}
842
843		/**
844		* Just like assertNull(x), but additionally recording (using
845	<	* threadRecordFailure) any AssertionFailedError thrown, so that
846	<	* the current testcase will fail.
845	>	* threadRecordFailure) any AssertionError thrown, so that the
846	>	* current testcase will fail.
847		*/
848		public void threadAssertNull(Object x) {
849		try {
850		assertNull(x);
851	<	} catch (AssertionFailedError t) {
852	<	threadRecordFailure(t);
853	<	throw t;
851	>	} catch (AssertionError fail) {
852	>	threadRecordFailure(fail);
853	>	throw fail;
854		}
855		}
856
857		/**
858		* Just like assertEquals(x, y), but additionally recording (using
859	<	* threadRecordFailure) any AssertionFailedError thrown, so that
860	<	* the current testcase will fail.
859	>	* threadRecordFailure) any AssertionError thrown, so that the
860	>	* current testcase will fail.
861		*/
862		public void threadAssertEquals(long x, long y) {
863		try {
864		assertEquals(x, y);
865	<	} catch (AssertionFailedError t) {
866	<	threadRecordFailure(t);
867	<	throw t;
865	>	} catch (AssertionError fail) {
866	>	threadRecordFailure(fail);
867	>	throw fail;
868		}
869		}
870
871		/**
872		* Just like assertEquals(x, y), but additionally recording (using
873	<	* threadRecordFailure) any AssertionFailedError thrown, so that
874	<	* the current testcase will fail.
873	>	* threadRecordFailure) any AssertionError thrown, so that the
874	>	* current testcase will fail.
875		*/
876		public void threadAssertEquals(Object x, Object y) {
877		try {
878		assertEquals(x, y);
879	<	} catch (AssertionFailedError fail) {
879	>	} catch (AssertionError fail) {
880		threadRecordFailure(fail);
881		throw fail;
882		} catch (Throwable fail) {
#	Line 677 | Line 886 | public class JSR166TestCase extends Test
886
887		/**
888		* Just like assertSame(x, y), but additionally recording (using
889	<	* threadRecordFailure) any AssertionFailedError thrown, so that
890	<	* the current testcase will fail.
889	>	* threadRecordFailure) any AssertionError thrown, so that the
890	>	* current testcase will fail.
891		*/
892		public void threadAssertSame(Object x, Object y) {
893		try {
894		assertSame(x, y);
895	<	} catch (AssertionFailedError fail) {
895	>	} catch (AssertionError fail) {
896		threadRecordFailure(fail);
897		throw fail;
898		}
#	Line 705 | Line 914 | public class JSR166TestCase extends Test
914
915		/**
916		* Records the given exception using {@link #threadRecordFailure},
917	<	* then rethrows the exception, wrapping it in an
918	<	* AssertionFailedError if necessary.
917	>	* then rethrows the exception, wrapping it in an AssertionError
918	>	* if necessary.
919		*/
920		public void threadUnexpectedException(Throwable t) {
921		threadRecordFailure(t);
#	Line 715 | Line 924 | public class JSR166TestCase extends Test
924		throw (RuntimeException) t;
925		else if (t instanceof Error)
926		throw (Error) t;
927	<	else {
928	<	AssertionFailedError afe =
720	<	new AssertionFailedError("unexpected exception: " + t);
721	<	afe.initCause(t);
722	<	throw afe;
723	<	}
927	>	else
928	>	throw new AssertionError("unexpected exception: " + t, t);
929		}
930
931		/**
932		* Delays, via Thread.sleep, for the given millisecond delay, but
933		* if the sleep is shorter than specified, may re-sleep or yield
934	<	* until time elapses.
934	>	* until time elapses.  Ensures that the given time, as measured
935	>	* by System.nanoTime(), has elapsed.
936		*/
937		static void delay(long millis) throws InterruptedException {
938	<	long startTime = System.nanoTime();
939	<	long ns = millis * 1000 * 1000;
940	<	for (;;) {
938	>	long nanos = millis * (1000 * 1000);
939	>	final long wakeupTime = System.nanoTime() + nanos;
940	>	do {
941		if (millis > 0L)
942		Thread.sleep(millis);
943		else // too short to sleep
944		Thread.yield();
945	<	long d = ns - (System.nanoTime() - startTime);
946	<	if (d > 0L)
947	<	millis = d / (1000 * 1000);
742	<	else
743	<	break;
744	<	}
945	>	nanos = wakeupTime - System.nanoTime();
946	>	millis = nanos / (1000 * 1000);
947	>	} while (nanos >= 0L);
948		}
949
950		/**
951		* Allows use of try-with-resources with per-test thread pools.
952		*/
953	<	static class PoolCloser<T extends ExecutorService>
954	<	implements AutoCloseable {
955	<	public final T pool;
753	<	public PoolCloser(T pool) { this.pool = pool; }
953	>	class PoolCleaner implements AutoCloseable {
954	>	private final ExecutorService pool;
955	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
956		public void close() { joinPool(pool); }
957		}
958
959		/**
960	+	* An extension of PoolCleaner that has an action to release the pool.
961	+	*/
962	+	class PoolCleanerWithReleaser extends PoolCleaner {
963	+	private final Runnable releaser;
964	+	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
965	+	super(pool);
966	+	this.releaser = releaser;
967	+	}
968	+	public void close() {
969	+	try {
970	+	releaser.run();
971	+	} finally {
972	+	super.close();
973	+	}
974	+	}
975	+	}
976	+
977	+	PoolCleaner cleaner(ExecutorService pool) {
978	+	return new PoolCleaner(pool);
979	+	}
980	+
981	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
982	+	return new PoolCleanerWithReleaser(pool, releaser);
983	+	}
984	+
985	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
986	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
987	+	}
988	+
989	+	Runnable releaser(final CountDownLatch latch) {
990	+	return new Runnable() { public void run() {
991	+	do { latch.countDown(); }
992	+	while (latch.getCount() > 0);
993	+	}};
994	+	}
995	+
996	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
997	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
998	+	}
999	+
1000	+	Runnable releaser(final AtomicBoolean flag) {
1001	+	return new Runnable() { public void run() { flag.set(true); }};
1002	+	}
1003	+
1004	+	/**
1005		* Waits out termination of a thread pool or fails doing so.
1006		*/
1007	<	static void joinPool(ExecutorService pool) {
1007	>	void joinPool(ExecutorService pool) {
1008		try {
1009		pool.shutdown();
1010	<	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS))
1011	<	fail("ExecutorService " + pool +
1012	<	" did not terminate in a timely manner");
1010	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
1011	>	try {
1012	>	threadFail("ExecutorService " + pool +
1013	>	" did not terminate in a timely manner");
1014	>	} finally {
1015	>	// last resort, for the benefit of subsequent tests
1016	>	pool.shutdownNow();
1017	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
1018	>	}
1019	>	}
1020		} catch (SecurityException ok) {
1021		// Allowed in case test doesn't have privs
1022		} catch (InterruptedException fail) {
1023	<	fail("Unexpected InterruptedException");
1023	>	threadFail("Unexpected InterruptedException");
1024		}
1025		}
1026
1027	<	/** Like Runnable, but with the freedom to throw anything */
1027	>	/**
1028	>	* Like Runnable, but with the freedom to throw anything.
1029	>	* junit folks had the same idea:
1030	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
1031	>	*/
1032		interface Action { public void run() throws Throwable; }
1033
1034		/**
#	Line 779 | Line 1037 | public class JSR166TestCase extends Test
1037		* necessarily individually slow because they must block.
1038		*/
1039		void testInParallel(Action ... actions) {
1040	<	try (PoolCloser<ExecutorService> poolCloser
1041	<	= new PoolCloser<>(Executors.newCachedThreadPool())) {
784	<	ExecutorService pool = poolCloser.pool;
1040	>	ExecutorService pool = Executors.newCachedThreadPool();
1041	>	try (PoolCleaner cleaner = cleaner(pool)) {
1042		ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1043		for (final Action action : actions)
1044		futures.add(pool.submit(new CheckedRunnable() {
#	Line 798 | Line 1055 | public class JSR166TestCase extends Test
1055		}
1056
1057		/**
1058	<	* A debugging tool to print all stack traces, as jstack does.
1058	>	* A debugging tool to print stack traces of most threads, as jstack does.
1059		* Uninteresting threads are filtered out.
1060		*/
1061	<	static void printAllStackTraces() {
1061	>	static void dumpTestThreads() {
1062	>	SecurityManager sm = System.getSecurityManager();
1063	>	if (sm != null) {
1064	>	try {
1065	>	System.setSecurityManager(null);
1066	>	} catch (SecurityException giveUp) {
1067	>	return;
1068	>	}
1069	>	}
1070	>
1071		ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1072		System.err.println("------ stacktrace dump start ------");
1073		for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1074	<	String name = info.getThreadName();
1074	>	final String name = info.getThreadName();
1075	>	String lockName;
1076		if ("Signal Dispatcher".equals(name))
1077		continue;
1078		if ("Reference Handler".equals(name)
1079	<	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
1079	>	&& (lockName = info.getLockName()) != null
1080	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1081		continue;
1082		if ("Finalizer".equals(name)
1083	<	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
1083	>	&& (lockName = info.getLockName()) != null
1084	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1085	>	continue;
1086	>	if ("checkForWedgedTest".equals(name))
1087		continue;
1088		System.err.print(info);
1089		}
1090		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	–	}
1091
1092	<	/**
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);
1092	>	if (sm != null) System.setSecurityManager(sm);
1093		}
1094
1095		/**
1096	<	* Checks that the threads do not terminate within the given millisecond delay.
1096	>	* Checks that thread eventually enters the expected blocked thread state.
1097		*/
1098	<	void assertThreadsStayAlive(long millis, Thread... threads) {
1099	<	try {
1100	<	// No need to optimize the failing case via Thread.join.
1101	<	delay(millis);
1102	<	for (Thread thread : threads)
1103	<	assertTrue(thread.isAlive());
1104	<	} catch (InterruptedException fail) {
1105	<	fail("Unexpected InterruptedException");
1098	>	void assertThreadBlocks(Thread thread, Thread.State expected) {
1099	>	// always sleep at least 1 ms, with high probability avoiding
1100	>	// transitory states
1101	>	for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
1102	>	try { delay(1); }
1103	>	catch (InterruptedException fail) {
1104	>	throw new AssertionError("Unexpected InterruptedException", fail);
1105	>	}
1106	>	Thread.State s = thread.getState();
1107	>	if (s == expected)
1108	>	return;
1109	>	else if (s == Thread.State.TERMINATED)
1110	>	fail("Unexpected thread termination");
1111		}
1112	+	fail("timed out waiting for thread to enter thread state " + expected);
1113		}
1114
1115		/**
#	Line 900 | Line 1150 | public class JSR166TestCase extends Test
1150		}
1151
1152		/**
1153	+	* The maximum number of consecutive spurious wakeups we should
1154	+	* tolerate (from APIs like LockSupport.park) before failing a test.
1155	+	*/
1156	+	static final int MAX_SPURIOUS_WAKEUPS = 10;
1157	+
1158	+	/**
1159		* The number of elements to place in collections, arrays, etc.
1160		*/
1161		public static final int SIZE = 20;
#	Line 1003 | Line 1259 | public class JSR166TestCase extends Test
1259		}
1260		public void refresh() {}
1261		public String toString() {
1262	<	List<Permission> ps = new ArrayList<Permission>();
1262	>	List<Permission> ps = new ArrayList<>();
1263		for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1264		ps.add(e.nextElement());
1265		return "AdjustablePolicy with permissions " + ps;
#	Line 1031 | Line 1287 | public class JSR166TestCase extends Test
1287
1288		/**
1289		* Sleeps until the given time has elapsed.
1290	<	* Throws AssertionFailedError if interrupted.
1290	>	* Throws AssertionError if interrupted.
1291		*/
1292	<	void sleep(long millis) {
1292	>	static void sleep(long millis) {
1293		try {
1294		delay(millis);
1295		} catch (InterruptedException fail) {
1296	<	AssertionFailedError afe =
1041	<	new AssertionFailedError("Unexpected InterruptedException");
1042	<	afe.initCause(fail);
1043	<	throw afe;
1296	>	throw new AssertionError("Unexpected InterruptedException", fail);
1297		}
1298		}
1299
1300		/**
1301		* Spin-waits up to the specified number of milliseconds for the given
1302		* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1303	+	* @param waitingForGodot if non-null, an additional condition to satisfy
1304		*/
1305	<	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1306	<	long startTime = System.nanoTime();
1307	<	for (;;) {
1308	<	Thread.State s = thread.getState();
1309	<	if (s == Thread.State.BLOCKED ||
1310	<	s == Thread.State.WAITING ||
1311	<	s == Thread.State.TIMED_WAITING)
1312	<	return;
1313	<	else if (s == Thread.State.TERMINATED)
1305	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis,
1306	>	Callable<Boolean> waitingForGodot) {
1307	>	for (long startTime = 0L;;) {
1308	>	switch (thread.getState()) {
1309	>	default: break;
1310	>	case BLOCKED: case WAITING: case TIMED_WAITING:
1311	>	try {
1312	>	if (waitingForGodot == null || waitingForGodot.call())
1313	>	return;
1314	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1315	>	break;
1316	>	case TERMINATED:
1317		fail("Unexpected thread termination");
1318	+	}
1319	+
1320	+	if (startTime == 0L)
1321	+	startTime = System.nanoTime();
1322		else if (millisElapsedSince(startTime) > timeoutMillis) {
1323	<	threadAssertTrue(thread.isAlive());
1324	<	return;
1323	>	assertTrue(thread.isAlive());
1324	>	if (waitingForGodot == null
1325	>	|| thread.getState() == Thread.State.RUNNABLE)
1326	>	fail("timed out waiting for thread to enter wait state");
1327	>	else
1328	>	fail("timed out waiting for condition, thread state="
1329	>	+ thread.getState());
1330		}
1331		Thread.yield();
1332		}
1333		}
1334
1335		/**
1336	<	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1337	<	* state: BLOCKED, WAITING, or TIMED_WAITING.
1336	>	* Spin-waits up to the specified number of milliseconds for the given
1337	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1338	>	*/
1339	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1340	>	waitForThreadToEnterWaitState(thread, timeoutMillis, null);
1341	>	}
1342	>
1343	>	/**
1344	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1345	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1346		*/
1347		void waitForThreadToEnterWaitState(Thread thread) {
1348	<	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1348	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, null);
1349	>	}
1350	>
1351	>	/**
1352	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1353	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1354	>	* and additionally satisfy the given condition.
1355	>	*/
1356	>	void waitForThreadToEnterWaitState(Thread thread,
1357	>	Callable<Boolean> waitingForGodot) {
1358	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1359		}
1360
1361		/**
#	Line 1089 | Line 1373 | public class JSR166TestCase extends Test
1373		//             r.run();
1374		//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1375		//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1376	<	//             throw new AssertionFailedError("did not return promptly");
1376	>	//             throw new AssertionError("did not return promptly");
1377		//     }
1378
1379		//     void assertTerminatesPromptly(Runnable r) {
#	Line 1102 | Line 1386 | public class JSR166TestCase extends Test
1386		*/
1387		<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1388		long startTime = System.nanoTime();
1389	+	T actual = null;
1390		try {
1391	<	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1391	>	actual = f.get(timeoutMillis, MILLISECONDS);
1392		} catch (Throwable fail) { threadUnexpectedException(fail); }
1393	+	assertEquals(expectedValue, actual);
1394		if (millisElapsedSince(startTime) > timeoutMillis/2)
1395	<	throw new AssertionFailedError("timed get did not return promptly");
1395	>	throw new AssertionError("timed get did not return promptly");
1396		}
1397
1398		<T> void checkTimedGet(Future<T> f, T expectedValue) {
#	Line 1136 | Line 1422 | public class JSR166TestCase extends Test
1422		} finally {
1423		if (t.getState() != Thread.State.TERMINATED) {
1424		t.interrupt();
1425	<	fail("Test timed out");
1425	>	threadFail("timed out waiting for thread to terminate");
1426		}
1427		}
1428		}
#	Line 1164 | Line 1450 | public class JSR166TestCase extends Test
1450		}
1451		}
1452
1167	–	public abstract class RunnableShouldThrow implements Runnable {
1168	–	protected abstract void realRun() throws Throwable;
1169	–
1170	–	final Class<?> exceptionClass;
1171	–
1172	–	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1173	–	this.exceptionClass = exceptionClass;
1174	–	}
1175	–
1176	–	public final void run() {
1177	–	try {
1178	–	realRun();
1179	–	threadShouldThrow(exceptionClass.getSimpleName());
1180	–	} catch (Throwable t) {
1181	–	if (! exceptionClass.isInstance(t))
1182	–	threadUnexpectedException(t);
1183	–	}
1184	–	}
1185	–	}
1186	–
1453		public abstract class ThreadShouldThrow extends Thread {
1454		protected abstract void realRun() throws Throwable;
1455
#	Line 1196 | Line 1462 | public class JSR166TestCase extends Test
1462		public final void run() {
1463		try {
1464		realRun();
1199	–	threadShouldThrow(exceptionClass.getSimpleName());
1465		} catch (Throwable t) {
1466		if (! exceptionClass.isInstance(t))
1467		threadUnexpectedException(t);
1468	+	return;
1469		}
1470	+	threadShouldThrow(exceptionClass.getSimpleName());
1471		}
1472		}
1473
#	Line 1210 | Line 1477 | public class JSR166TestCase extends Test
1477		public final void run() {
1478		try {
1479		realRun();
1213	–	threadShouldThrow("InterruptedException");
1480		} catch (InterruptedException success) {
1481		threadAssertFalse(Thread.interrupted());
1482	+	return;
1483		} catch (Throwable fail) {
1484		threadUnexpectedException(fail);
1485		}
1486	+	threadShouldThrow("InterruptedException");
1487		}
1488		}
1489
#	Line 1227 | Line 1495 | public class JSR166TestCase extends Test
1495		return realCall();
1496		} catch (Throwable fail) {
1497		threadUnexpectedException(fail);
1230	–	return null;
1498		}
1499	<	}
1233	<	}
1234	<
1235	<	public abstract class CheckedInterruptedCallable<T>
1236	<	implements Callable<T> {
1237	<	protected abstract T realCall() throws Throwable;
1238	<
1239	<	public final T call() {
1240	<	try {
1241	<	T result = realCall();
1242	<	threadShouldThrow("InterruptedException");
1243	<	return result;
1244	<	} catch (InterruptedException success) {
1245	<	threadAssertFalse(Thread.interrupted());
1246	<	} catch (Throwable fail) {
1247	<	threadUnexpectedException(fail);
1248	<	}
1249	<	return null;
1499	>	throw new AssertionError("unreached");
1500		}
1501		}
1502
#	Line 1284 | Line 1534 | public class JSR166TestCase extends Test
1534		}};
1535		}
1536
1537	<	public Runnable awaiter(final CountDownLatch latch) {
1538	<	return new CheckedRunnable() {
1539	<	public void realRun() throws InterruptedException {
1540	<	await(latch);
1541	<	}};
1537	>	class LatchAwaiter extends CheckedRunnable {
1538	>	static final int NEW = 0;
1539	>	static final int RUNNING = 1;
1540	>	static final int DONE = 2;
1541	>	final CountDownLatch latch;
1542	>	int state = NEW;
1543	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1544	>	public void realRun() throws InterruptedException {
1545	>	state = 1;
1546	>	await(latch);
1547	>	state = 2;
1548	>	}
1549		}
1550
1551	<	public void await(CountDownLatch latch) {
1551	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1552	>	return new LatchAwaiter(latch);
1553	>	}
1554	>
1555	>	public void await(CountDownLatch latch, long timeoutMillis) {
1556	>	boolean timedOut = false;
1557		try {
1558	<	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1558	>	timedOut = !latch.await(timeoutMillis, MILLISECONDS);
1559		} catch (Throwable fail) {
1560		threadUnexpectedException(fail);
1561		}
1562	+	if (timedOut)
1563	+	fail("timed out waiting for CountDownLatch for "
1564	+	+ (timeoutMillis/1000) + " sec");
1565	+	}
1566	+
1567	+	public void await(CountDownLatch latch) {
1568	+	await(latch, LONG_DELAY_MS);
1569		}
1570
1571		public void await(Semaphore semaphore) {
1572	+	boolean timedOut = false;
1573	+	try {
1574	+	timedOut = !semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS);
1575	+	} catch (Throwable fail) {
1576	+	threadUnexpectedException(fail);
1577	+	}
1578	+	if (timedOut)
1579	+	fail("timed out waiting for Semaphore for "
1580	+	+ (LONG_DELAY_MS/1000) + " sec");
1581	+	}
1582	+
1583	+	public void await(CyclicBarrier barrier) {
1584		try {
1585	<	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1585	>	barrier.await(LONG_DELAY_MS, MILLISECONDS);
1586		} catch (Throwable fail) {
1587		threadUnexpectedException(fail);
1588		}
#	Line 1321 | Line 1602 | public class JSR166TestCase extends Test
1602		//         long startTime = System.nanoTime();
1603		//         while (!flag.get()) {
1604		//             if (millisElapsedSince(startTime) > timeoutMillis)
1605	<	//                 throw new AssertionFailedError("timed out");
1605	>	//                 throw new AssertionError("timed out");
1606		//             Thread.yield();
1607		//         }
1608		//     }
#	Line 1330 | Line 1611 | public class JSR166TestCase extends Test
1611		public String call() { throw new NullPointerException(); }
1612		}
1613
1333	–	public static class CallableOne implements Callable<Integer> {
1334	–	public Integer call() { return one; }
1335	–	}
1336	–
1337	–	public class ShortRunnable extends CheckedRunnable {
1338	–	protected void realRun() throws Throwable {
1339	–	delay(SHORT_DELAY_MS);
1340	–	}
1341	–	}
1342	–
1343	–	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1344	–	protected void realRun() throws InterruptedException {
1345	–	delay(SHORT_DELAY_MS);
1346	–	}
1347	–	}
1348	–
1349	–	public class SmallRunnable extends CheckedRunnable {
1350	–	protected void realRun() throws Throwable {
1351	–	delay(SMALL_DELAY_MS);
1352	–	}
1353	–	}
1354	–
1355	–	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1356	–	protected void realRun() {
1357	–	try {
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	–	delay(SMALL_DELAY_MS);
1366	–	return Boolean.TRUE;
1367	–	}
1368	–	}
1369	–
1370	–	public class MediumRunnable extends CheckedRunnable {
1371	–	protected void realRun() throws Throwable {
1372	–	delay(MEDIUM_DELAY_MS);
1373	–	}
1374	–	}
1375	–
1376	–	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1377	–	protected void realRun() throws InterruptedException {
1378	–	delay(MEDIUM_DELAY_MS);
1379	–	}
1380	–	}
1381	–
1614		public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1615		return new CheckedRunnable() {
1616		protected void realRun() {
#	Line 1388 | Line 1620 | public class JSR166TestCase extends Test
1620		}};
1621		}
1622
1391	–	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1392	–	protected void realRun() {
1393	–	try {
1394	–	delay(MEDIUM_DELAY_MS);
1395	–	} catch (InterruptedException ok) {}
1396	–	}
1397	–	}
1398	–
1399	–	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1400	–	protected void realRun() {
1401	–	try {
1402	–	delay(LONG_DELAY_MS);
1403	–	} catch (InterruptedException ok) {}
1404	–	}
1405	–	}
1406	–
1623		/**
1624		* For use as ThreadFactory in constructors
1625		*/
#	Line 1417 | Line 1633 | public class JSR166TestCase extends Test
1633		boolean isDone();
1634		}
1635
1420	–	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1421	–	return new TrackedRunnable() {
1422	–	private volatile boolean done = false;
1423	–	public boolean isDone() { return done; }
1424	–	public void run() {
1425	–	try {
1426	–	delay(timeoutMillis);
1427	–	done = true;
1428	–	} catch (InterruptedException ok) {}
1429	–	}
1430	–	};
1431	–	}
1432	–
1433	–	public static class TrackedShortRunnable implements Runnable {
1434	–	public volatile boolean done = false;
1435	–	public void run() {
1436	–	try {
1437	–	delay(SHORT_DELAY_MS);
1438	–	done = true;
1439	–	} catch (InterruptedException ok) {}
1440	–	}
1441	–	}
1442	–
1443	–	public static class TrackedSmallRunnable implements Runnable {
1444	–	public volatile boolean done = false;
1445	–	public void run() {
1446	–	try {
1447	–	delay(SMALL_DELAY_MS);
1448	–	done = true;
1449	–	} catch (InterruptedException ok) {}
1450	–	}
1451	–	}
1452	–
1453	–	public static class TrackedMediumRunnable implements Runnable {
1454	–	public volatile boolean done = false;
1455	–	public void run() {
1456	–	try {
1457	–	delay(MEDIUM_DELAY_MS);
1458	–	done = true;
1459	–	} catch (InterruptedException ok) {}
1460	–	}
1461	–	}
1462	–
1463	–	public static class TrackedLongRunnable implements Runnable {
1464	–	public volatile boolean done = false;
1465	–	public void run() {
1466	–	try {
1467	–	delay(LONG_DELAY_MS);
1468	–	done = true;
1469	–	} catch (InterruptedException ok) {}
1470	–	}
1471	–	}
1472	–
1636		public static class TrackedNoOpRunnable implements Runnable {
1637		public volatile boolean done = false;
1638		public void run() {
#	Line 1477 | Line 1640 | public class JSR166TestCase extends Test
1640		}
1641		}
1642
1480	–	public static class TrackedCallable implements Callable {
1481	–	public volatile boolean done = false;
1482	–	public Object call() {
1483	–	try {
1484	–	delay(SMALL_DELAY_MS);
1485	–	done = true;
1486	–	} catch (InterruptedException ok) {}
1487	–	return Boolean.TRUE;
1488	–	}
1489	–	}
1490	–
1643		/**
1644		* Analog of CheckedRunnable for RecursiveAction
1645		*/
#	Line 1514 | Line 1666 | public class JSR166TestCase extends Test
1666		return realCompute();
1667		} catch (Throwable fail) {
1668		threadUnexpectedException(fail);
1517	–	return null;
1669		}
1670	+	throw new AssertionError("unreached");
1671		}
1672		}
1673
#	Line 1529 | Line 1681 | public class JSR166TestCase extends Test
1681
1682		/**
1683		* A CyclicBarrier that uses timed await and fails with
1684	<	* AssertionFailedErrors instead of throwing checked exceptions.
1684	>	* AssertionErrors instead of throwing checked exceptions.
1685		*/
1686	<	public class CheckedBarrier extends CyclicBarrier {
1686	>	public static class CheckedBarrier extends CyclicBarrier {
1687		public CheckedBarrier(int parties) { super(parties); }
1688
1689		public int await() {
1690		try {
1691		return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1692		} catch (TimeoutException timedOut) {
1693	<	throw new AssertionFailedError("timed out");
1693	>	throw new AssertionError("timed out");
1694		} catch (Exception fail) {
1695	<	AssertionFailedError afe =
1544	<	new AssertionFailedError("Unexpected exception: " + fail);
1545	<	afe.initCause(fail);
1546	<	throw afe;
1695	>	throw new AssertionError("Unexpected exception: " + fail, fail);
1696		}
1697		}
1698		}
#	Line 1554 | Line 1703 | public class JSR166TestCase extends Test
1703		assertEquals(0, q.size());
1704		assertNull(q.peek());
1705		assertNull(q.poll());
1706	<	assertNull(q.poll(0, MILLISECONDS));
1706	>	assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit()));
1707		assertEquals(q.toString(), "[]");
1708		assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1709		assertFalse(q.iterator().hasNext());
#	Line 1595 | Line 1744 | public class JSR166TestCase extends Test
1744		}
1745		}
1746
1747	+	void assertImmutable(final Object o) {
1748	+	if (o instanceof Collection) {
1749	+	assertThrows(
1750	+	UnsupportedOperationException.class,
1751	+	new Runnable() { public void run() {
1752	+	((Collection) o).add(null);}});
1753	+	}
1754	+	}
1755	+
1756		@SuppressWarnings("unchecked")
1757		<T> T serialClone(T o) {
1758	+	T clone = null;
1759		try {
1760		ObjectInputStream ois = new ObjectInputStream
1761		(new ByteArrayInputStream(serialBytes(o)));
1762	<	T clone = (T) ois.readObject();
1604	<	assertSame(o.getClass(), clone.getClass());
1605	<	return clone;
1762	>	clone = (T) ois.readObject();
1763		} catch (Throwable fail) {
1764		threadUnexpectedException(fail);
1765	+	}
1766	+	if (o == clone) assertImmutable(o);
1767	+	else assertSame(o.getClass(), clone.getClass());
1768	+	return clone;
1769	+	}
1770	+
1771	+	/**
1772	+	* A version of serialClone that leaves error handling (for
1773	+	* e.g. NotSerializableException) up to the caller.
1774	+	*/
1775	+	@SuppressWarnings("unchecked")
1776	+	<T> T serialClonePossiblyFailing(T o)
1777	+	throws ReflectiveOperationException, java.io.IOException {
1778	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1779	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1780	+	oos.writeObject(o);
1781	+	oos.flush();
1782	+	oos.close();
1783	+	ObjectInputStream ois = new ObjectInputStream
1784	+	(new ByteArrayInputStream(bos.toByteArray()));
1785	+	T clone = (T) ois.readObject();
1786	+	if (o == clone) assertImmutable(o);
1787	+	else assertSame(o.getClass(), clone.getClass());
1788	+	return clone;
1789	+	}
1790	+
1791	+	/**
1792	+	* If o implements Cloneable and has a public clone method,
1793	+	* returns a clone of o, else null.
1794	+	*/
1795	+	@SuppressWarnings("unchecked")
1796	+	<T> T cloneableClone(T o) {
1797	+	if (!(o instanceof Cloneable)) return null;
1798	+	final T clone;
1799	+	try {
1800	+	clone = (T) o.getClass().getMethod("clone").invoke(o);
1801	+	} catch (NoSuchMethodException ok) {
1802		return null;
1803	+	} catch (ReflectiveOperationException unexpected) {
1804	+	throw new Error(unexpected);
1805		}
1806	+	assertNotSame(o, clone); // not 100% guaranteed by spec
1807	+	assertSame(o.getClass(), clone.getClass());
1808	+	return clone;
1809		}
1810
1811		public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
#	Line 1616 | Line 1815 | public class JSR166TestCase extends Test
1815		try { throwingAction.run(); }
1816		catch (Throwable t) {
1817		threw = true;
1818	<	if (!expectedExceptionClass.isInstance(t)) {
1819	<	AssertionFailedError afe =
1820	<	new AssertionFailedError
1821	<	("Expected " + expectedExceptionClass.getName() +
1822	<	", got " + t.getClass().getName());
1624	<	afe.initCause(t);
1625	<	threadUnexpectedException(afe);
1626	<	}
1818	>	if (!expectedExceptionClass.isInstance(t))
1819	>	throw new AssertionError(
1820	>	"Expected " + expectedExceptionClass.getName() +
1821	>	", got " + t.getClass().getName(),
1822	>	t);
1823		}
1824		if (!threw)
1825		shouldThrow(expectedExceptionClass.getName());
#	Line 1637 | Line 1833 | public class JSR166TestCase extends Test
1833		} catch (NoSuchElementException success) {}
1834		assertFalse(it.hasNext());
1835		}
1836	+
1837	+	public <T> Callable<T> callableThrowing(final Exception ex) {
1838	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1839	+	}
1840	+
1841	+	public Runnable runnableThrowing(final RuntimeException ex) {
1842	+	return new Runnable() { public void run() { throw ex; }};
1843	+	}
1844	+
1845	+	/** A reusable thread pool to be shared by tests. */
1846	+	static final ExecutorService cachedThreadPool =
1847	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1848	+	1000L, MILLISECONDS,
1849	+	new SynchronousQueue<Runnable>());
1850	+
1851	+	static <T> void shuffle(T[] array) {
1852	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1853	+	}
1854	+
1855	+	/**
1856	+	* Returns the same String as would be returned by {@link
1857	+	* Object#toString}, whether or not the given object's class
1858	+	* overrides toString().
1859	+	*
1860	+	* @see System#identityHashCode
1861	+	*/
1862	+	static String identityString(Object x) {
1863	+	return x.getClass().getName()
1864	+	+ "@" + Integer.toHexString(System.identityHashCode(x));
1865	+	}
1866	+
1867	+	// --- Shared assertions for Executor tests ---
1868	+
1869	+	/**
1870	+	* Returns maximum number of tasks that can be submitted to given
1871	+	* pool (with bounded queue) before saturation (when submission
1872	+	* throws RejectedExecutionException).
1873	+	*/
1874	+	static final int saturatedSize(ThreadPoolExecutor pool) {
1875	+	BlockingQueue<Runnable> q = pool.getQueue();
1876	+	return pool.getMaximumPoolSize() + q.size() + q.remainingCapacity();
1877	+	}
1878	+
1879	+	@SuppressWarnings("FutureReturnValueIgnored")
1880	+	void assertNullTaskSubmissionThrowsNullPointerException(Executor e) {
1881	+	try {
1882	+	e.execute((Runnable) null);
1883	+	shouldThrow();
1884	+	} catch (NullPointerException success) {}
1885	+
1886	+	if (! (e instanceof ExecutorService)) return;
1887	+	ExecutorService es = (ExecutorService) e;
1888	+	try {
1889	+	es.submit((Runnable) null);
1890	+	shouldThrow();
1891	+	} catch (NullPointerException success) {}
1892	+	try {
1893	+	es.submit((Runnable) null, Boolean.TRUE);
1894	+	shouldThrow();
1895	+	} catch (NullPointerException success) {}
1896	+	try {
1897	+	es.submit((Callable) null);
1898	+	shouldThrow();
1899	+	} catch (NullPointerException success) {}
1900	+
1901	+	if (! (e instanceof ScheduledExecutorService)) return;
1902	+	ScheduledExecutorService ses = (ScheduledExecutorService) e;
1903	+	try {
1904	+	ses.schedule((Runnable) null,
1905	+	randomTimeout(), randomTimeUnit());
1906	+	shouldThrow();
1907	+	} catch (NullPointerException success) {}
1908	+	try {
1909	+	ses.schedule((Callable) null,
1910	+	randomTimeout(), randomTimeUnit());
1911	+	shouldThrow();
1912	+	} catch (NullPointerException success) {}
1913	+	try {
1914	+	ses.scheduleAtFixedRate((Runnable) null,
1915	+	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
1916	+	shouldThrow();
1917	+	} catch (NullPointerException success) {}
1918	+	try {
1919	+	ses.scheduleWithFixedDelay((Runnable) null,
1920	+	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
1921	+	shouldThrow();
1922	+	} catch (NullPointerException success) {}
1923	+	}
1924	+
1925	+	void setRejectedExecutionHandler(
1926	+	ThreadPoolExecutor p, RejectedExecutionHandler handler) {
1927	+	p.setRejectedExecutionHandler(handler);
1928	+	assertSame(handler, p.getRejectedExecutionHandler());
1929	+	}
1930	+
1931	+	void assertTaskSubmissionsAreRejected(ThreadPoolExecutor p) {
1932	+	final RejectedExecutionHandler savedHandler = p.getRejectedExecutionHandler();
1933	+	final long savedTaskCount = p.getTaskCount();
1934	+	final long savedCompletedTaskCount = p.getCompletedTaskCount();
1935	+	final int savedQueueSize = p.getQueue().size();
1936	+	final boolean stock = (p.getClass().getClassLoader() == null);
1937	+
1938	+	Runnable r = () -> {};
1939	+	Callable<Boolean> c = () -> Boolean.TRUE;
1940	+
1941	+	class Recorder implements RejectedExecutionHandler {
1942	+	public volatile Runnable r = null;
1943	+	public volatile ThreadPoolExecutor p = null;
1944	+	public void reset() { r = null; p = null; }
1945	+	public void rejectedExecution(Runnable r, ThreadPoolExecutor p) {
1946	+	assertNull(this.r);
1947	+	assertNull(this.p);
1948	+	this.r = r;
1949	+	this.p = p;
1950	+	}
1951	+	}
1952	+
1953	+	// check custom handler is invoked exactly once per task
1954	+	Recorder recorder = new Recorder();
1955	+	setRejectedExecutionHandler(p, recorder);
1956	+	for (int i = 2; i--> 0; ) {
1957	+	recorder.reset();
1958	+	p.execute(r);
1959	+	if (stock && p.getClass() == ThreadPoolExecutor.class)
1960	+	assertSame(r, recorder.r);
1961	+	assertSame(p, recorder.p);
1962	+
1963	+	recorder.reset();
1964	+	assertFalse(p.submit(r).isDone());
1965	+	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1966	+	assertSame(p, recorder.p);
1967	+
1968	+	recorder.reset();
1969	+	assertFalse(p.submit(r, Boolean.TRUE).isDone());
1970	+	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1971	+	assertSame(p, recorder.p);
1972	+
1973	+	recorder.reset();
1974	+	assertFalse(p.submit(c).isDone());
1975	+	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1976	+	assertSame(p, recorder.p);
1977	+
1978	+	if (p instanceof ScheduledExecutorService) {
1979	+	ScheduledExecutorService s = (ScheduledExecutorService) p;
1980	+	ScheduledFuture<?> future;
1981	+
1982	+	recorder.reset();
1983	+	future = s.schedule(r, randomTimeout(), randomTimeUnit());
1984	+	assertFalse(future.isDone());
1985	+	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1986	+	assertSame(p, recorder.p);
1987	+
1988	+	recorder.reset();
1989	+	future = s.schedule(c, randomTimeout(), randomTimeUnit());
1990	+	assertFalse(future.isDone());
1991	+	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1992	+	assertSame(p, recorder.p);
1993	+
1994	+	recorder.reset();
1995	+	future = s.scheduleAtFixedRate(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
1996	+	assertFalse(future.isDone());
1997	+	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1998	+	assertSame(p, recorder.p);
1999	+
2000	+	recorder.reset();
2001	+	future = s.scheduleWithFixedDelay(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2002	+	assertFalse(future.isDone());
2003	+	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2004	+	assertSame(p, recorder.p);
2005	+	}
2006	+	}
2007	+
2008	+	// Checking our custom handler above should be sufficient, but
2009	+	// we add some integration tests of standard handlers.
2010	+	final AtomicReference<Thread> thread = new AtomicReference<>();
2011	+	final Runnable setThread = () -> thread.set(Thread.currentThread());
2012	+
2013	+	setRejectedExecutionHandler(p, new ThreadPoolExecutor.AbortPolicy());
2014	+	try {
2015	+	p.execute(setThread);
2016	+	shouldThrow();
2017	+	} catch (RejectedExecutionException success) {}
2018	+	assertNull(thread.get());
2019	+
2020	+	setRejectedExecutionHandler(p, new ThreadPoolExecutor.DiscardPolicy());
2021	+	p.execute(setThread);
2022	+	assertNull(thread.get());
2023	+
2024	+	setRejectedExecutionHandler(p, new ThreadPoolExecutor.CallerRunsPolicy());
2025	+	p.execute(setThread);
2026	+	if (p.isShutdown())
2027	+	assertNull(thread.get());
2028	+	else
2029	+	assertSame(Thread.currentThread(), thread.get());
2030	+
2031	+	setRejectedExecutionHandler(p, savedHandler);
2032	+
2033	+	// check that pool was not perturbed by handlers
2034	+	assertEquals(savedTaskCount, p.getTaskCount());
2035	+	assertEquals(savedCompletedTaskCount, p.getCompletedTaskCount());
2036	+	assertEquals(savedQueueSize, p.getQueue().size());
2037	+	}
2038	+
2039	+	void assertCollectionsEquals(Collection<?> x, Collection<?> y) {
2040	+	assertEquals(x, y);
2041	+	assertEquals(y, x);
2042	+	assertEquals(x.isEmpty(), y.isEmpty());
2043	+	assertEquals(x.size(), y.size());
2044	+	if (x instanceof List) {
2045	+	assertEquals(x.toString(), y.toString());
2046	+	}
2047	+	if (x instanceof List || x instanceof Set) {
2048	+	assertEquals(x.hashCode(), y.hashCode());
2049	+	}
2050	+	if (x instanceof List || x instanceof Deque) {
2051	+	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2052	+	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2053	+	y.toArray(new Object[0])));
2054	+	}
2055	+	}
2056	+
2057	+	/**
2058	+	* A weaker form of assertCollectionsEquals which does not insist
2059	+	* that the two collections satisfy Object#equals(Object), since
2060	+	* they may use identity semantics as Deques do.
2061	+	*/
2062	+	void assertCollectionsEquivalent(Collection<?> x, Collection<?> y) {
2063	+	if (x instanceof List || x instanceof Set)
2064	+	assertCollectionsEquals(x, y);
2065	+	else {
2066	+	assertEquals(x.isEmpty(), y.isEmpty());
2067	+	assertEquals(x.size(), y.size());
2068	+	assertEquals(new HashSet(x), new HashSet(y));
2069	+	if (x instanceof Deque) {
2070	+	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2071	+	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2072	+	y.toArray(new Object[0])));
2073	+	}
2074	+	}
2075	+	}
2076		}

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