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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.139 by jsr166, Sun Sep 6 21:14:12 2015 UTC vs.
Revision 1.232 by jsr166, Mon May 29 19:15:02 2017 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 15 | Line 50 | import java.io.ObjectInputStream;
50		import java.io.ObjectOutputStream;
51		import java.lang.management.ManagementFactory;
52		import java.lang.management.ThreadInfo;
53	+	import java.lang.management.ThreadMXBean;
54		import java.lang.reflect.Constructor;
55		import java.lang.reflect.Method;
56		import java.lang.reflect.Modifier;
#	Line 27 | 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.Enumeration;
70		import java.util.Iterator;
#	Line 40 | Line 78 | import java.util.concurrent.CyclicBarrie
78		import java.util.concurrent.ExecutionException;
79		import java.util.concurrent.Executors;
80		import java.util.concurrent.ExecutorService;
81	+	import java.util.concurrent.ForkJoinPool;
82		import java.util.concurrent.Future;
83		import java.util.concurrent.RecursiveAction;
84		import java.util.concurrent.RecursiveTask;
85		import java.util.concurrent.RejectedExecutionHandler;
86		import java.util.concurrent.Semaphore;
87	+	import java.util.concurrent.SynchronousQueue;
88		import java.util.concurrent.ThreadFactory;
89	+	import java.util.concurrent.ThreadLocalRandom;
90		import java.util.concurrent.ThreadPoolExecutor;
91	+	import java.util.concurrent.TimeUnit;
92		import java.util.concurrent.TimeoutException;
93	+	import java.util.concurrent.atomic.AtomicBoolean;
94		import java.util.concurrent.atomic.AtomicReference;
95		import java.util.regex.Pattern;
96
#	Line 67 | Line 110 | import junit.framework.TestSuite;
110		*
111		* <ol>
112		*
113	<	* <li> All assertions in code running in generated threads must use
113	>	* <li>All assertions in code running in generated threads must use
114		* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
115		* #threadAssertEquals}, or {@link #threadAssertNull}, (not
116		* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
117		* particularly recommended) for other code to use these forms too.
118		* Only the most typically used JUnit assertion methods are defined
119	<	* this way, but enough to live with.</li>
119	>	* this way, but enough to live with.
120		*
121	<	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
121	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
122		* to invoke {@code super.setUp} and {@code super.tearDown} within
123		* them. These methods are used to clear and check for thread
124	<	* assertion failures.</li>
124	>	* assertion failures.
125		*
126		* <li>All delays and timeouts must use one of the constants {@code
127		* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
#	Line 89 | Line 132 | import junit.framework.TestSuite;
132		* is always discriminable as larger than SHORT and smaller than
133		* MEDIUM.  And so on. These constants are set to conservative values,
134		* but even so, if there is ever any doubt, they can all be increased
135	<	* in one spot to rerun tests on slower platforms.</li>
135	>	* in one spot to rerun tests on slower platforms.
136		*
137	<	* <li> All threads generated must be joined inside each test case
137	>	* <li>All threads generated must be joined inside each test case
138		* method (or {@code fail} to do so) before returning from the
139		* method. The {@code joinPool} method can be used to do this when
140	<	* using Executors.</li>
140	>	* using Executors.
141		*
142		* </ol>
143		*
144		* <p><b>Other notes</b>
145		* <ul>
146		*
147	<	* <li> Usually, there is one testcase method per JSR166 method
147	>	* <li>Usually, there is one testcase method per JSR166 method
148		* covering "normal" operation, and then as many exception-testing
149		* methods as there are exceptions the method can throw. Sometimes
150		* there are multiple tests per JSR166 method when the different
151		* "normal" behaviors differ significantly. And sometimes testcases
152	<	* cover multiple methods when they cannot be tested in
110	<	* isolation.</li>
152	>	* cover multiple methods when they cannot be tested in isolation.
153		*
154	<	* <li> The documentation style for testcases is to provide as javadoc
154	>	* <li>The documentation style for testcases is to provide as javadoc
155		* a simple sentence or two describing the property that the testcase
156		* method purports to test. The javadocs do not say anything about how
157	<	* the property is tested. To find out, read the code.</li>
157	>	* the property is tested. To find out, read the code.
158		*
159	<	* <li> These tests are "conformance tests", and do not attempt to
159	>	* <li>These tests are "conformance tests", and do not attempt to
160		* test throughput, latency, scalability or other performance factors
161		* (see the separate "jtreg" tests for a set intended to check these
162		* for the most central aspects of functionality.) So, most tests use
163		* the smallest sensible numbers of threads, collection sizes, etc
164	<	* needed to check basic conformance.</li>
164	>	* needed to check basic conformance.
165		*
166		* <li>The test classes currently do not declare inclusion in
167		* any particular package to simplify things for people integrating
168	<	* them in TCK test suites.</li>
168	>	* them in TCK test suites.
169		*
170	<	* <li> As a convenience, the {@code main} of this class (JSR166TestCase)
171	<	* runs all JSR166 unit tests.</li>
170	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
171	>	* runs all JSR166 unit tests.
172		*
173		* </ul>
174		*/
#	Line 170 | Line 212 | public class JSR166TestCase extends Test
212		private static final int suiteRuns =
213		Integer.getInteger("jsr166.suiteRuns", 1);
214
215	+	/**
216	+	* Returns the value of the system property, or NaN if not defined.
217	+	*/
218	+	private static float systemPropertyValue(String name) {
219	+	String floatString = System.getProperty(name);
220	+	if (floatString == null)
221	+	return Float.NaN;
222	+	try {
223	+	return Float.parseFloat(floatString);
224	+	} catch (NumberFormatException ex) {
225	+	throw new IllegalArgumentException(
226	+	String.format("Bad float value in system property %s=%s",
227	+	name, floatString));
228	+	}
229	+	}
230	+
231	+	/**
232	+	* The scaling factor to apply to standard delays used in tests.
233	+	* May be initialized from any of:
234	+	* - the "jsr166.delay.factor" system property
235	+	* - the "test.timeout.factor" system property (as used by jtreg)
236	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
237	+	* - hard-coded fuzz factor when using a known slowpoke VM
238	+	*/
239	+	private static final float delayFactor = delayFactor();
240	+
241	+	private static float delayFactor() {
242	+	float x;
243	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
244	+	return x;
245	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
246	+	return x;
247	+	String prop = System.getProperty("java.vm.version");
248	+	if (prop != null && prop.matches(".*debug.*"))
249	+	return 4.0f; // How much slower is fastdebug than product?!
250	+	return 1.0f;
251	+	}
252	+
253		public JSR166TestCase() { super(); }
254		public JSR166TestCase(String name) { super(name); }
255
#	Line 185 | Line 265 | public class JSR166TestCase extends Test
265		return (regex == null) ? null : Pattern.compile(regex);
266		}
267
268	<	protected void runTest() throws Throwable {
268	>	// Instrumentation to debug very rare, but very annoying hung test runs.
269	>	static volatile TestCase currentTestCase;
270	>	// static volatile int currentRun = 0;
271	>	static {
272	>	Runnable checkForWedgedTest = new Runnable() { public void run() {
273	>	// Avoid spurious reports with enormous runsPerTest.
274	>	// A single test case run should never take more than 1 second.
275	>	// But let's cap it at the high end too ...
276	>	final int timeoutMinutes =
277	>	Math.min(15, Math.max(runsPerTest / 60, 1));
278	>	for (TestCase lastTestCase = currentTestCase;;) {
279	>	try { MINUTES.sleep(timeoutMinutes); }
280	>	catch (InterruptedException unexpected) { break; }
281	>	if (lastTestCase == currentTestCase) {
282	>	System.err.printf(
283	>	"Looks like we're stuck running test: %s%n",
284	>	lastTestCase);
285	>	//                     System.err.printf(
286	>	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
287	>	//                         lastTestCase, currentRun, runsPerTest);
288	>	//                     System.err.println("availableProcessors=" +
289	>	//                         Runtime.getRuntime().availableProcessors());
290	>	//                     System.err.printf("cpu model = %s%n", cpuModel());
291	>	dumpTestThreads();
292	>	// one stack dump is probably enough; more would be spam
293	>	break;
294	>	}
295	>	lastTestCase = currentTestCase;
296	>	}}};
297	>	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
298	>	thread.setDaemon(true);
299	>	thread.start();
300	>	}
301	>
302	>	//     public static String cpuModel() {
303	>	//         try {
304	>	//             java.util.regex.Matcher matcher
305	>	//               = Pattern.compile("model name\\s*: (.*)")
306	>	//                 .matcher(new String(
307	>	//                     java.nio.file.Files.readAllBytes(
308	>	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
309	>	//             matcher.find();
310	>	//             return matcher.group(1);
311	>	//         } catch (Exception ex) { return null; }
312	>	//     }
313	>
314	>	public void runBare() throws Throwable {
315	>	currentTestCase = this;
316		if (methodFilter == null
317	<	|| methodFilter.matcher(toString()).find()) {
318	<	for (int i = 0; i < runsPerTest; i++) {
319	<	if (profileTests)
320	<	runTestProfiled();
321	<	else
322	<	super.runTest();
323	<	}
317	>	|| methodFilter.matcher(toString()).find())
318	>	super.runBare();
319	>	}
320	>
321	>	protected void runTest() throws Throwable {
322	>	for (int i = 0; i < runsPerTest; i++) {
323	>	// currentRun = i;
324	>	if (profileTests)
325	>	runTestProfiled();
326	>	else
327	>	super.runTest();
328		}
329		}
330
331		protected void runTestProfiled() throws Throwable {
332	<	// Warmup run, notably to trigger all needed classloading.
333	<	super.runTest();
203	<	long t0 = System.nanoTime();
204	<	try {
332	>	for (int i = 0; i < 2; i++) {
333	>	long startTime = System.nanoTime();
334		super.runTest();
335	<	} finally {
336	<	long elapsedMillis = millisElapsedSince(t0);
337	<	if (elapsedMillis >= profileThreshold)
335	>	long elapsedMillis = millisElapsedSince(startTime);
336	>	if (elapsedMillis < profileThreshold)
337	>	break;
338	>	// Never report first run of any test; treat it as a
339	>	// warmup run, notably to trigger all needed classloading,
340	>	if (i > 0)
341		System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
342		}
343		}
#	Line 217 | Line 349 | public class JSR166TestCase extends Test
349		main(suite(), args);
350		}
351
352	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
353	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
354	+	long runTime;
355	+	public void startTest(Test test) {}
356	+	protected void printHeader(long runTime) {
357	+	this.runTime = runTime; // defer printing for later
358	+	}
359	+	protected void printFooter(TestResult result) {
360	+	if (result.wasSuccessful()) {
361	+	getWriter().println("OK (" + result.runCount() + " tests)"
362	+	+ "  Time: " + elapsedTimeAsString(runTime));
363	+	} else {
364	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
365	+	super.printFooter(result);
366	+	}
367	+	}
368	+	}
369	+
370	+	/**
371	+	* Returns a TestRunner that doesn't bother with unnecessary
372	+	* fluff, like printing a "." for each test case.
373	+	*/
374	+	static junit.textui.TestRunner newPithyTestRunner() {
375	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
376	+	runner.setPrinter(new PithyResultPrinter(System.out));
377	+	return runner;
378	+	}
379	+
380		/**
381		* Runs all unit tests in the given test suite.
382		* Actual behavior influenced by jsr166.* system properties.
#	Line 228 | Line 388 | public class JSR166TestCase extends Test
388		System.setSecurityManager(new SecurityManager());
389		}
390		for (int i = 0; i < suiteRuns; i++) {
391	<	TestResult result = junit.textui.TestRunner.run(suite);
391	>	TestResult result = newPithyTestRunner().doRun(suite);
392		if (!result.wasSuccessful())
393		System.exit(1);
394		System.gc();
#	Line 312 | Line 472 | public class JSR166TestCase extends Test
472		AbstractQueuedLongSynchronizerTest.suite(),
473		ArrayBlockingQueueTest.suite(),
474		ArrayDequeTest.suite(),
475	+	ArrayListTest.suite(),
476		AtomicBooleanTest.suite(),
477		AtomicIntegerArrayTest.suite(),
478		AtomicIntegerFieldUpdaterTest.suite(),
#	Line 334 | Line 495 | public class JSR166TestCase extends Test
495		CopyOnWriteArrayListTest.suite(),
496		CopyOnWriteArraySetTest.suite(),
497		CountDownLatchTest.suite(),
498	+	CountedCompleterTest.suite(),
499		CyclicBarrierTest.suite(),
500		DelayQueueTest.suite(),
501		EntryTest.suite(),
#	Line 362 | Line 524 | public class JSR166TestCase extends Test
524		TreeMapTest.suite(),
525		TreeSetTest.suite(),
526		TreeSubMapTest.suite(),
527	<	TreeSubSetTest.suite());
527	>	TreeSubSetTest.suite(),
528	>	VectorTest.suite());
529
530		// Java8+ test classes
531		if (atLeastJava8()) {
532		String[] java8TestClassNames = {
533	+	"ArrayDeque8Test",
534		"Atomic8Test",
535		"CompletableFutureTest",
536		"ConcurrentHashMap8Test",
537	<	"CountedCompleterTest",
537	>	"CountedCompleter8Test",
538		"DoubleAccumulatorTest",
539		"DoubleAdderTest",
540		"ForkJoinPool8Test",
541		"ForkJoinTask8Test",
542	+	"LinkedBlockingDeque8Test",
543	+	"LinkedBlockingQueue8Test",
544		"LongAccumulatorTest",
545		"LongAdderTest",
546		"SplittableRandomTest",
547		"StampedLockTest",
548	+	"SubmissionPublisherTest",
549		"ThreadLocalRandom8Test",
550	+	"TimeUnit8Test",
551		};
552		addNamedTestClasses(suite, java8TestClassNames);
553		}
#	Line 387 | Line 555 | public class JSR166TestCase extends Test
555		// Java9+ test classes
556		if (atLeastJava9()) {
557		String[] java9TestClassNames = {
558	<	// Currently empty
558	>	"AtomicBoolean9Test",
559	>	"AtomicInteger9Test",
560	>	"AtomicIntegerArray9Test",
561	>	"AtomicLong9Test",
562	>	"AtomicLongArray9Test",
563	>	"AtomicReference9Test",
564	>	"AtomicReferenceArray9Test",
565	>	"ExecutorCompletionService9Test",
566	>	"ForkJoinPool9Test",
567		};
568		addNamedTestClasses(suite, java9TestClassNames);
569		}
#	Line 398 | Line 574 | public class JSR166TestCase extends Test
574		/** Returns list of junit-style test method names in given class. */
575		public static ArrayList<String> testMethodNames(Class<?> testClass) {
576		Method[] methods = testClass.getDeclaredMethods();
577	<	ArrayList<String> names = new ArrayList<String>(methods.length);
577	>	ArrayList<String> names = new ArrayList<>(methods.length);
578		for (Method method : methods) {
579		if (method.getName().startsWith("test")
580		&& Modifier.isPublic(method.getModifiers())
#	Line 454 | Line 630 | public class JSR166TestCase extends Test
630		} else {
631		return new TestSuite();
632		}
457	–
633		}
634
635		// Delays for timing-dependent tests, in milliseconds.
#	Line 464 | Line 639 | public class JSR166TestCase extends Test
639		public static long MEDIUM_DELAY_MS;
640		public static long LONG_DELAY_MS;
641
642	+	private static final long RANDOM_TIMEOUT;
643	+	private static final long RANDOM_EXPIRED_TIMEOUT;
644	+	private static final TimeUnit RANDOM_TIMEUNIT;
645	+	static {
646	+	ThreadLocalRandom rnd = ThreadLocalRandom.current();
647	+	long[] timeouts = { Long.MIN_VALUE, -1, 0, 1, Long.MAX_VALUE };
648	+	RANDOM_TIMEOUT = timeouts[rnd.nextInt(timeouts.length)];
649	+	RANDOM_EXPIRED_TIMEOUT = timeouts[rnd.nextInt(3)];
650	+	TimeUnit[] timeUnits = TimeUnit.values();
651	+	RANDOM_TIMEUNIT = timeUnits[rnd.nextInt(timeUnits.length)];
652	+	}
653	+
654	+	/**
655	+	* Returns a timeout for use when any value at all will do.
656	+	*/
657	+	static long randomTimeout() { return RANDOM_TIMEOUT; }
658	+
659	+	/**
660	+	* Returns a timeout that means "no waiting", i.e. not positive.
661	+	*/
662	+	static long randomExpiredTimeout() { return RANDOM_EXPIRED_TIMEOUT; }
663	+
664	+	/**
665	+	* Returns a random non-null TimeUnit.
666	+	*/
667	+	static TimeUnit randomTimeUnit() { return RANDOM_TIMEUNIT; }
668	+
669		/**
670	<	* Returns the shortest timed delay. This could
671	<	* be reimplemented to use for example a Property.
670	>	* Returns the shortest timed delay. This can be scaled up for
671	>	* slow machines using the jsr166.delay.factor system property,
672	>	* or via jtreg's -timeoutFactor: flag.
673	>	* http://openjdk.java.net/jtreg/command-help.html
674		*/
675		protected long getShortDelay() {
676	<	return 50;
676	>	return (long) (50 * delayFactor);
677		}
678
679		/**
#	Line 482 | Line 686 | public class JSR166TestCase extends Test
686		LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
687		}
688
689	+	private static final long TIMEOUT_DELAY_MS
690	+	= (long) (12.0 * Math.cbrt(delayFactor));
691	+
692		/**
693	<	* Returns a timeout in milliseconds to be used in tests that
694	<	* verify that operations block or time out.
693	>	* Returns a timeout in milliseconds to be used in tests that verify
694	>	* that operations block or time out.  We want this to be longer
695	>	* than the OS scheduling quantum, but not too long, so don't scale
696	>	* linearly with delayFactor; we use "crazy" cube root instead.
697		*/
698	<	long timeoutMillis() {
699	<	return SHORT_DELAY_MS / 4;
698	>	static long timeoutMillis() {
699	>	return TIMEOUT_DELAY_MS;
700		}
701
702		/**
#	Line 503 | Line 712 | public class JSR166TestCase extends Test
712		* The first exception encountered if any threadAssertXXX method fails.
713		*/
714		private final AtomicReference<Throwable> threadFailure
715	<	= new AtomicReference<Throwable>(null);
715	>	= new AtomicReference<>(null);
716
717		/**
718		* Records an exception so that it can be rethrown later in the test
#	Line 512 | Line 721 | public class JSR166TestCase extends Test
721		* the same test have no effect.
722		*/
723		public void threadRecordFailure(Throwable t) {
724	+	System.err.println(t);
725	+	dumpTestThreads();
726		threadFailure.compareAndSet(null, t);
727		}
728
#	Line 519 | Line 730 | public class JSR166TestCase extends Test
730		setDelays();
731		}
732
733	+	void tearDownFail(String format, Object... args) {
734	+	String msg = toString() + ": " + String.format(format, args);
735	+	System.err.println(msg);
736	+	dumpTestThreads();
737	+	throw new AssertionFailedError(msg);
738	+	}
739	+
740		/**
741		* Extra checks that get done for all test cases.
742		*
#	Line 546 | Line 764 | public class JSR166TestCase extends Test
764		}
765
766		if (Thread.interrupted())
767	<	throw new AssertionFailedError("interrupt status set in main thread");
767	>	tearDownFail("interrupt status set in main thread");
768
769		checkForkJoinPoolThreadLeaks();
770		}
771
772		/**
773	<	* Finds missing try { ... } finally { joinPool(e); }
773	>	* Finds missing PoolCleaners
774		*/
775		void checkForkJoinPoolThreadLeaks() throws InterruptedException {
776	<	Thread[] survivors = new Thread[5];
776	>	Thread[] survivors = new Thread[7];
777		int count = Thread.enumerate(survivors);
778		for (int i = 0; i < count; i++) {
779		Thread thread = survivors[i];
#	Line 563 | Line 781 | public class JSR166TestCase extends Test
781		if (name.startsWith("ForkJoinPool-")) {
782		// give thread some time to terminate
783		thread.join(LONG_DELAY_MS);
784	<	if (!thread.isAlive()) continue;
785	<	throw new AssertionFailedError
786	<	(String.format("Found leaked ForkJoinPool thread test=%s thread=%s%n",
569	<	toString(), name));
784	>	if (thread.isAlive())
785	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
786	>	thread);
787		}
788		}
789	+
790	+	if (!ForkJoinPool.commonPool()
791	+	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
792	+	tearDownFail("ForkJoin common pool thread stuck");
793		}
794
795		/**
#	Line 581 | Line 802 | public class JSR166TestCase extends Test
802		fail(reason);
803		} catch (AssertionFailedError t) {
804		threadRecordFailure(t);
805	<	fail(reason);
805	>	throw t;
806		}
807		}
808
#	Line 708 | Line 929 | public class JSR166TestCase extends Test
929		/**
930		* Delays, via Thread.sleep, for the given millisecond delay, but
931		* if the sleep is shorter than specified, may re-sleep or yield
932	<	* until time elapses.
932	>	* until time elapses.  Ensures that the given time, as measured
933	>	* by System.nanoTime(), has elapsed.
934		*/
935		static void delay(long millis) throws InterruptedException {
936	<	long startTime = System.nanoTime();
937	<	long ns = millis * 1000 * 1000;
938	<	for (;;) {
936	>	long nanos = millis * (1000 * 1000);
937	>	final long wakeupTime = System.nanoTime() + nanos;
938	>	do {
939		if (millis > 0L)
940		Thread.sleep(millis);
941		else // too short to sleep
942		Thread.yield();
943	<	long d = ns - (System.nanoTime() - startTime);
944	<	if (d > 0L)
945	<	millis = d / (1000 * 1000);
946	<	else
947	<	break;
943	>	nanos = wakeupTime - System.nanoTime();
944	>	millis = nanos / (1000 * 1000);
945	>	} while (nanos >= 0L);
946	>	}
947	>
948	>	/**
949	>	* Allows use of try-with-resources with per-test thread pools.
950	>	*/
951	>	class PoolCleaner implements AutoCloseable {
952	>	private final ExecutorService pool;
953	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
954	>	public void close() { joinPool(pool); }
955	>	}
956	>
957	>	/**
958	>	* An extension of PoolCleaner that has an action to release the pool.
959	>	*/
960	>	class PoolCleanerWithReleaser extends PoolCleaner {
961	>	private final Runnable releaser;
962	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
963	>	super(pool);
964	>	this.releaser = releaser;
965	>	}
966	>	public void close() {
967	>	try {
968	>	releaser.run();
969	>	} finally {
970	>	super.close();
971	>	}
972		}
973		}
974
975	+	PoolCleaner cleaner(ExecutorService pool) {
976	+	return new PoolCleaner(pool);
977	+	}
978	+
979	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
980	+	return new PoolCleanerWithReleaser(pool, releaser);
981	+	}
982	+
983	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
984	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
985	+	}
986	+
987	+	Runnable releaser(final CountDownLatch latch) {
988	+	return new Runnable() { public void run() {
989	+	do { latch.countDown(); }
990	+	while (latch.getCount() > 0);
991	+	}};
992	+	}
993	+
994	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
995	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
996	+	}
997	+
998	+	Runnable releaser(final AtomicBoolean flag) {
999	+	return new Runnable() { public void run() { flag.set(true); }};
1000	+	}
1001	+
1002		/**
1003		* Waits out termination of a thread pool or fails doing so.
1004		*/
1005		void joinPool(ExecutorService pool) {
1006		try {
1007		pool.shutdown();
1008	<	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS))
1009	<	fail("ExecutorService " + pool +
1010	<	" did not terminate in a timely manner");
1008	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
1009	>	try {
1010	>	threadFail("ExecutorService " + pool +
1011	>	" did not terminate in a timely manner");
1012	>	} finally {
1013	>	// last resort, for the benefit of subsequent tests
1014	>	pool.shutdownNow();
1015	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
1016	>	}
1017	>	}
1018		} catch (SecurityException ok) {
1019		// Allowed in case test doesn't have privs
1020		} catch (InterruptedException fail) {
1021	<	fail("Unexpected InterruptedException");
1021	>	threadFail("Unexpected InterruptedException");
1022		}
1023		}
1024
1025	<	/** Like Runnable, but with the freedom to throw anything */
1026	<	interface Thunk { public void run() throws Throwable; }
1025	>	/**
1026	>	* Like Runnable, but with the freedom to throw anything.
1027	>	* junit folks had the same idea:
1028	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
1029	>	*/
1030	>	interface Action { public void run() throws Throwable; }
1031
1032		/**
1033	<	* Runs all the given tasks in parallel, failing if any fail.
1033	>	* Runs all the given actions in parallel, failing if any fail.
1034		* Useful for running multiple variants of tests that are
1035		* necessarily individually slow because they must block.
1036		*/
1037	<	void testInParallel(Thunk ... thunks) {
1037	>	void testInParallel(Action ... actions) {
1038		ExecutorService pool = Executors.newCachedThreadPool();
1039	<	try {
1040	<	ArrayList<Future<?>> futures = new ArrayList<>(thunks.length);
1041	<	for (final Thunk thunk : thunks)
1039	>	try (PoolCleaner cleaner = cleaner(pool)) {
1040	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1041	>	for (final Action action : actions)
1042		futures.add(pool.submit(new CheckedRunnable() {
1043	<	public void realRun() throws Throwable { thunk.run();}}));
1043	>	public void realRun() throws Throwable { action.run();}}));
1044		for (Future<?> future : futures)
1045		try {
1046		assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
#	Line 765 | Line 1049 | public class JSR166TestCase extends Test
1049		} catch (Exception ex) {
1050		threadUnexpectedException(ex);
1051		}
768	–	} finally {
769	–	joinPool(pool);
1052		}
1053		}
1054
1055		/**
1056	<	* A debugging tool to print all stack traces, as jstack does.
1056	>	* A debugging tool to print stack traces of most threads, as jstack does.
1057	>	* Uninteresting threads are filtered out.
1058		*/
1059	<	static void printAllStackTraces() {
1060	<	for (ThreadInfo info :
1061	<	ManagementFactory.getThreadMXBean()
1062	<	.dumpAllThreads(true, true))
1059	>	static void dumpTestThreads() {
1060	>	SecurityManager sm = System.getSecurityManager();
1061	>	if (sm != null) {
1062	>	try {
1063	>	System.setSecurityManager(null);
1064	>	} catch (SecurityException giveUp) {
1065	>	return;
1066	>	}
1067	>	}
1068	>
1069	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1070	>	System.err.println("------ stacktrace dump start ------");
1071	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1072	>	final String name = info.getThreadName();
1073	>	String lockName;
1074	>	if ("Signal Dispatcher".equals(name))
1075	>	continue;
1076	>	if ("Reference Handler".equals(name)
1077	>	&& (lockName = info.getLockName()) != null
1078	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1079	>	continue;
1080	>	if ("Finalizer".equals(name)
1081	>	&& (lockName = info.getLockName()) != null
1082	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1083	>	continue;
1084	>	if ("checkForWedgedTest".equals(name))
1085	>	continue;
1086		System.err.print(info);
1087	+	}
1088	+	System.err.println("------ stacktrace dump end ------");
1089	+
1090	+	if (sm != null) System.setSecurityManager(sm);
1091	+	}
1092	+
1093	+	/**
1094	+	* Checks that thread eventually enters the expected blocked thread state.
1095	+	*/
1096	+	void assertThreadBlocks(Thread thread, Thread.State expected) {
1097	+	// always sleep at least 1 ms, with high probability avoiding
1098	+	// transitory states
1099	+	for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
1100	+	try { delay(1); }
1101	+	catch (InterruptedException fail) {
1102	+	fail("Unexpected InterruptedException");
1103	+	}
1104	+	Thread.State s = thread.getState();
1105	+	if (s == expected)
1106	+	return;
1107	+	else if (s == Thread.State.TERMINATED)
1108	+	fail("Unexpected thread termination");
1109	+	}
1110	+	fail("timed out waiting for thread to enter thread state " + expected);
1111		}
1112
1113		/**
1114		* Checks that thread does not terminate within the default
1115		* millisecond delay of {@code timeoutMillis()}.
1116	+	* TODO: REMOVEME
1117		*/
1118		void assertThreadStaysAlive(Thread thread) {
1119		assertThreadStaysAlive(thread, timeoutMillis());
#	Line 790 | Line 1121 | public class JSR166TestCase extends Test
1121
1122		/**
1123		* Checks that thread does not terminate within the given millisecond delay.
1124	+	* TODO: REMOVEME
1125		*/
1126		void assertThreadStaysAlive(Thread thread, long millis) {
1127		try {
#	Line 797 | Line 1129 | public class JSR166TestCase extends Test
1129		delay(millis);
1130		assertTrue(thread.isAlive());
1131		} catch (InterruptedException fail) {
1132	<	fail("Unexpected InterruptedException");
1132	>	threadFail("Unexpected InterruptedException");
1133		}
1134		}
1135
1136		/**
1137		* Checks that the threads do not terminate within the default
1138		* millisecond delay of {@code timeoutMillis()}.
1139	+	* TODO: REMOVEME
1140		*/
1141		void assertThreadsStayAlive(Thread... threads) {
1142		assertThreadsStayAlive(timeoutMillis(), threads);
#	Line 811 | Line 1144 | public class JSR166TestCase extends Test
1144
1145		/**
1146		* Checks that the threads do not terminate within the given millisecond delay.
1147	+	* TODO: REMOVEME
1148		*/
1149		void assertThreadsStayAlive(long millis, Thread... threads) {
1150		try {
#	Line 819 | Line 1153 | public class JSR166TestCase extends Test
1153		for (Thread thread : threads)
1154		assertTrue(thread.isAlive());
1155		} catch (InterruptedException fail) {
1156	<	fail("Unexpected InterruptedException");
1156	>	threadFail("Unexpected InterruptedException");
1157		}
1158		}
1159
#	Line 861 | Line 1195 | public class JSR166TestCase extends Test
1195		}
1196
1197		/**
1198	+	* The maximum number of consecutive spurious wakeups we should
1199	+	* tolerate (from APIs like LockSupport.park) before failing a test.
1200	+	*/
1201	+	static final int MAX_SPURIOUS_WAKEUPS = 10;
1202	+
1203	+	/**
1204		* The number of elements to place in collections, arrays, etc.
1205		*/
1206		public static final int SIZE = 20;
#	Line 964 | Line 1304 | public class JSR166TestCase extends Test
1304		}
1305		public void refresh() {}
1306		public String toString() {
1307	<	List<Permission> ps = new ArrayList<Permission>();
1307	>	List<Permission> ps = new ArrayList<>();
1308		for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1309		ps.add(e.nextElement());
1310		return "AdjustablePolicy with permissions " + ps;
#	Line 994 | Line 1334 | public class JSR166TestCase extends Test
1334		* Sleeps until the given time has elapsed.
1335		* Throws AssertionFailedError if interrupted.
1336		*/
1337	<	void sleep(long millis) {
1337	>	static void sleep(long millis) {
1338		try {
1339		delay(millis);
1340		} catch (InterruptedException fail) {
#	Line 1010 | Line 1350 | public class JSR166TestCase extends Test
1350		* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1351		*/
1352		void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1353	<	long startTime = System.nanoTime();
1353	>	long startTime = 0L;
1354		for (;;) {
1355		Thread.State s = thread.getState();
1356		if (s == Thread.State.BLOCKED ||
#	Line 1019 | Line 1359 | public class JSR166TestCase extends Test
1359		return;
1360		else if (s == Thread.State.TERMINATED)
1361		fail("Unexpected thread termination");
1362	+	else if (startTime == 0L)
1363	+	startTime = System.nanoTime();
1364		else if (millisElapsedSince(startTime) > timeoutMillis) {
1365		threadAssertTrue(thread.isAlive());
1366	<	return;
1366	>	fail("timed out waiting for thread to enter wait state");
1367	>	}
1368	>	Thread.yield();
1369	>	}
1370	>	}
1371	>
1372	>	/**
1373	>	* Spin-waits up to the specified number of milliseconds for the given
1374	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1375	>	* and additionally satisfy the given condition.
1376	>	*/
1377	>	void waitForThreadToEnterWaitState(
1378	>	Thread thread, long timeoutMillis, Callable<Boolean> waitingForGodot) {
1379	>	long startTime = 0L;
1380	>	for (;;) {
1381	>	Thread.State s = thread.getState();
1382	>	if (s == Thread.State.BLOCKED ||
1383	>	s == Thread.State.WAITING ||
1384	>	s == Thread.State.TIMED_WAITING) {
1385	>	try {
1386	>	if (waitingForGodot.call())
1387	>	return;
1388	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1389	>	}
1390	>	else if (s == Thread.State.TERMINATED)
1391	>	fail("Unexpected thread termination");
1392	>	else if (startTime == 0L)
1393	>	startTime = System.nanoTime();
1394	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1395	>	threadAssertTrue(thread.isAlive());
1396	>	fail("timed out waiting for thread to enter wait state");
1397		}
1398		Thread.yield();
1399		}
1400		}
1401
1402		/**
1403	<	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1404	<	* state: BLOCKED, WAITING, or TIMED_WAITING.
1403	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1404	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1405		*/
1406		void waitForThreadToEnterWaitState(Thread thread) {
1407		waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1408		}
1409
1410		/**
1411	+	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1412	+	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1413	+	* and additionally satisfy the given condition.
1414	+	*/
1415	+	void waitForThreadToEnterWaitState(
1416	+	Thread thread, Callable<Boolean> waitingForGodot) {
1417	+	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1418	+	}
1419	+
1420	+	/**
1421		* Returns the number of milliseconds since time given by
1422		* startNanoTime, which must have been previously returned from a
1423		* call to {@link System#nanoTime()}.
#	Line 1097 | Line 1479 | public class JSR166TestCase extends Test
1479		} finally {
1480		if (t.getState() != Thread.State.TERMINATED) {
1481		t.interrupt();
1482	<	fail("Test timed out");
1482	>	threadFail("timed out waiting for thread to terminate");
1483		}
1484		}
1485		}
#	Line 1222 | Line 1604 | public class JSR166TestCase extends Test
1604		public static final String TEST_STRING = "a test string";
1605
1606		public static class StringTask implements Callable<String> {
1607	<	public String call() { return TEST_STRING; }
1607	>	final String value;
1608	>	public StringTask() { this(TEST_STRING); }
1609	>	public StringTask(String value) { this.value = value; }
1610	>	public String call() { return value; }
1611		}
1612
1613		public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
#	Line 1235 | Line 1620 | public class JSR166TestCase extends Test
1620		}};
1621		}
1622
1623	<	public Runnable awaiter(final CountDownLatch latch) {
1623	>	public Runnable countDowner(final CountDownLatch latch) {
1624		return new CheckedRunnable() {
1625		public void realRun() throws InterruptedException {
1626	<	await(latch);
1626	>	latch.countDown();
1627		}};
1628		}
1629
1630	<	public void await(CountDownLatch latch) {
1630	>	class LatchAwaiter extends CheckedRunnable {
1631	>	static final int NEW = 0;
1632	>	static final int RUNNING = 1;
1633	>	static final int DONE = 2;
1634	>	final CountDownLatch latch;
1635	>	int state = NEW;
1636	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1637	>	public void realRun() throws InterruptedException {
1638	>	state = 1;
1639	>	await(latch);
1640	>	state = 2;
1641	>	}
1642	>	}
1643	>
1644	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1645	>	return new LatchAwaiter(latch);
1646	>	}
1647	>
1648	>	public void await(CountDownLatch latch, long timeoutMillis) {
1649		try {
1650	<	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1650	>	if (!latch.await(timeoutMillis, MILLISECONDS))
1651	>	fail("timed out waiting for CountDownLatch for "
1652	>	+ (timeoutMillis/1000) + " sec");
1653		} catch (Throwable fail) {
1654		threadUnexpectedException(fail);
1655		}
1656		}
1657
1658	+	public void await(CountDownLatch latch) {
1659	+	await(latch, LONG_DELAY_MS);
1660	+	}
1661	+
1662		public void await(Semaphore semaphore) {
1663		try {
1664	<	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1664	>	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1665	>	fail("timed out waiting for Semaphore for "
1666	>	+ (LONG_DELAY_MS/1000) + " sec");
1667	>	} catch (Throwable fail) {
1668	>	threadUnexpectedException(fail);
1669	>	}
1670	>	}
1671	>
1672	>	public void await(CyclicBarrier barrier) {
1673	>	try {
1674	>	barrier.await(LONG_DELAY_MS, MILLISECONDS);
1675		} catch (Throwable fail) {
1676		threadUnexpectedException(fail);
1677		}
#	Line 1281 | Line 1700 | public class JSR166TestCase extends Test
1700		public String call() { throw new NullPointerException(); }
1701		}
1702
1284	–	public static class CallableOne implements Callable<Integer> {
1285	–	public Integer call() { return one; }
1286	–	}
1287	–
1288	–	public class ShortRunnable extends CheckedRunnable {
1289	–	protected void realRun() throws Throwable {
1290	–	delay(SHORT_DELAY_MS);
1291	–	}
1292	–	}
1293	–
1294	–	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1295	–	protected void realRun() throws InterruptedException {
1296	–	delay(SHORT_DELAY_MS);
1297	–	}
1298	–	}
1299	–
1300	–	public class SmallRunnable extends CheckedRunnable {
1301	–	protected void realRun() throws Throwable {
1302	–	delay(SMALL_DELAY_MS);
1303	–	}
1304	–	}
1305	–
1703		public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1704		protected void realRun() {
1705		try {
#	Line 1311 | Line 1708 | public class JSR166TestCase extends Test
1708		}
1709		}
1710
1314	–	public class SmallCallable extends CheckedCallable {
1315	–	protected Object realCall() throws InterruptedException {
1316	–	delay(SMALL_DELAY_MS);
1317	–	return Boolean.TRUE;
1318	–	}
1319	–	}
1320	–
1321	–	public class MediumRunnable extends CheckedRunnable {
1322	–	protected void realRun() throws Throwable {
1323	–	delay(MEDIUM_DELAY_MS);
1324	–	}
1325	–	}
1326	–
1327	–	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1328	–	protected void realRun() throws InterruptedException {
1329	–	delay(MEDIUM_DELAY_MS);
1330	–	}
1331	–	}
1332	–
1711		public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1712		return new CheckedRunnable() {
1713		protected void realRun() {
#	Line 1339 | Line 1717 | public class JSR166TestCase extends Test
1717		}};
1718		}
1719
1342	–	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1343	–	protected void realRun() {
1344	–	try {
1345	–	delay(MEDIUM_DELAY_MS);
1346	–	} catch (InterruptedException ok) {}
1347	–	}
1348	–	}
1349	–
1350	–	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1351	–	protected void realRun() {
1352	–	try {
1353	–	delay(LONG_DELAY_MS);
1354	–	} catch (InterruptedException ok) {}
1355	–	}
1356	–	}
1357	–
1720		/**
1721		* For use as ThreadFactory in constructors
1722		*/
#	Line 1368 | Line 1730 | public class JSR166TestCase extends Test
1730		boolean isDone();
1731		}
1732
1371	–	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1372	–	return new TrackedRunnable() {
1373	–	private volatile boolean done = false;
1374	–	public boolean isDone() { return done; }
1375	–	public void run() {
1376	–	try {
1377	–	delay(timeoutMillis);
1378	–	done = true;
1379	–	} catch (InterruptedException ok) {}
1380	–	}
1381	–	};
1382	–	}
1383	–
1384	–	public static class TrackedShortRunnable implements Runnable {
1385	–	public volatile boolean done = false;
1386	–	public void run() {
1387	–	try {
1388	–	delay(SHORT_DELAY_MS);
1389	–	done = true;
1390	–	} catch (InterruptedException ok) {}
1391	–	}
1392	–	}
1393	–
1394	–	public static class TrackedSmallRunnable implements Runnable {
1395	–	public volatile boolean done = false;
1396	–	public void run() {
1397	–	try {
1398	–	delay(SMALL_DELAY_MS);
1399	–	done = true;
1400	–	} catch (InterruptedException ok) {}
1401	–	}
1402	–	}
1403	–
1404	–	public static class TrackedMediumRunnable implements Runnable {
1405	–	public volatile boolean done = false;
1406	–	public void run() {
1407	–	try {
1408	–	delay(MEDIUM_DELAY_MS);
1409	–	done = true;
1410	–	} catch (InterruptedException ok) {}
1411	–	}
1412	–	}
1413	–
1414	–	public static class TrackedLongRunnable implements Runnable {
1415	–	public volatile boolean done = false;
1416	–	public void run() {
1417	–	try {
1418	–	delay(LONG_DELAY_MS);
1419	–	done = true;
1420	–	} catch (InterruptedException ok) {}
1421	–	}
1422	–	}
1423	–
1733		public static class TrackedNoOpRunnable implements Runnable {
1734		public volatile boolean done = false;
1735		public void run() {
#	Line 1428 | Line 1737 | public class JSR166TestCase extends Test
1737		}
1738		}
1739
1431	–	public static class TrackedCallable implements Callable {
1432	–	public volatile boolean done = false;
1433	–	public Object call() {
1434	–	try {
1435	–	delay(SMALL_DELAY_MS);
1436	–	done = true;
1437	–	} catch (InterruptedException ok) {}
1438	–	return Boolean.TRUE;
1439	–	}
1440	–	}
1441	–
1740		/**
1741		* Analog of CheckedRunnable for RecursiveAction
1742		*/
#	Line 1482 | Line 1780 | public class JSR166TestCase extends Test
1780		* A CyclicBarrier that uses timed await and fails with
1781		* AssertionFailedErrors instead of throwing checked exceptions.
1782		*/
1783	<	public class CheckedBarrier extends CyclicBarrier {
1783	>	public static class CheckedBarrier extends CyclicBarrier {
1784		public CheckedBarrier(int parties) { super(parties); }
1785
1786		public int await() {
#	Line 1505 | Line 1803 | public class JSR166TestCase extends Test
1803		assertEquals(0, q.size());
1804		assertNull(q.peek());
1805		assertNull(q.poll());
1806	<	assertNull(q.poll(0, MILLISECONDS));
1806	>	assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit()));
1807		assertEquals(q.toString(), "[]");
1808		assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1809		assertFalse(q.iterator().hasNext());
#	Line 1546 | Line 1844 | public class JSR166TestCase extends Test
1844		}
1845		}
1846
1847	+	void assertImmutable(final Object o) {
1848	+	if (o instanceof Collection) {
1849	+	assertThrows(
1850	+	UnsupportedOperationException.class,
1851	+	new Runnable() { public void run() {
1852	+	((Collection) o).add(null);}});
1853	+	}
1854	+	}
1855	+
1856		@SuppressWarnings("unchecked")
1857		<T> T serialClone(T o) {
1858		try {
1859		ObjectInputStream ois = new ObjectInputStream
1860		(new ByteArrayInputStream(serialBytes(o)));
1861		T clone = (T) ois.readObject();
1862	+	if (o == clone) assertImmutable(o);
1863		assertSame(o.getClass(), clone.getClass());
1864		return clone;
1865		} catch (Throwable fail) {
#	Line 1560 | Line 1868 | public class JSR166TestCase extends Test
1868		}
1869		}
1870
1871	+	/**
1872	+	* A version of serialClone that leaves error handling (for
1873	+	* e.g. NotSerializableException) up to the caller.
1874	+	*/
1875	+	@SuppressWarnings("unchecked")
1876	+	<T> T serialClonePossiblyFailing(T o)
1877	+	throws ReflectiveOperationException, java.io.IOException {
1878	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1879	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1880	+	oos.writeObject(o);
1881	+	oos.flush();
1882	+	oos.close();
1883	+	ObjectInputStream ois = new ObjectInputStream
1884	+	(new ByteArrayInputStream(bos.toByteArray()));
1885	+	T clone = (T) ois.readObject();
1886	+	if (o == clone) assertImmutable(o);
1887	+	assertSame(o.getClass(), clone.getClass());
1888	+	return clone;
1889	+	}
1890	+
1891	+	/**
1892	+	* If o implements Cloneable and has a public clone method,
1893	+	* returns a clone of o, else null.
1894	+	*/
1895	+	@SuppressWarnings("unchecked")
1896	+	<T> T cloneableClone(T o) {
1897	+	if (!(o instanceof Cloneable)) return null;
1898	+	final T clone;
1899	+	try {
1900	+	clone = (T) o.getClass().getMethod("clone").invoke(o);
1901	+	} catch (NoSuchMethodException ok) {
1902	+	return null;
1903	+	} catch (ReflectiveOperationException unexpected) {
1904	+	throw new Error(unexpected);
1905	+	}
1906	+	assertNotSame(o, clone); // not 100% guaranteed by spec
1907	+	assertSame(o.getClass(), clone.getClass());
1908	+	return clone;
1909	+	}
1910	+
1911		public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1912		Runnable... throwingActions) {
1913		for (Runnable throwingAction : throwingActions) {
#	Line 1588 | Line 1936 | public class JSR166TestCase extends Test
1936		} catch (NoSuchElementException success) {}
1937		assertFalse(it.hasNext());
1938		}
1939	+
1940	+	public <T> Callable<T> callableThrowing(final Exception ex) {
1941	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1942	+	}
1943	+
1944	+	public Runnable runnableThrowing(final RuntimeException ex) {
1945	+	return new Runnable() { public void run() { throw ex; }};
1946	+	}
1947	+
1948	+	/** A reusable thread pool to be shared by tests. */
1949	+	static final ExecutorService cachedThreadPool =
1950	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1951	+	1000L, MILLISECONDS,
1952	+	new SynchronousQueue<Runnable>());
1953	+
1954	+	static <T> void shuffle(T[] array) {
1955	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1956	+	}
1957		}

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