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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.155 by jsr166, Sat Oct 3 19:59:49 2015 UTC vs.
Revision 1.272 by dl, Tue Jan 26 13:33:06 2021 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 14 | Line 49 | import java.io.ByteArrayOutputStream;
49		import java.io.ObjectInputStream;
50		import java.io.ObjectOutputStream;
51		import java.lang.management.ManagementFactory;
52	+	import java.lang.management.LockInfo;
53		import java.lang.management.ThreadInfo;
54		import java.lang.management.ThreadMXBean;
55		import java.lang.reflect.Constructor;
#	Line 28 | Line 64 | import java.security.ProtectionDomain;
64		import java.security.SecurityPermission;
65		import java.util.ArrayList;
66		import java.util.Arrays;
67	+	import java.util.Collection;
68	+	import java.util.Collections;
69		import java.util.Date;
70	+	import java.util.Deque;
71		import java.util.Enumeration;
72	+	import java.util.HashSet;
73		import java.util.Iterator;
74		import java.util.List;
75		import java.util.NoSuchElementException;
76		import java.util.PropertyPermission;
77	+	import java.util.Queue;
78	+	import java.util.Set;
79		import java.util.concurrent.BlockingQueue;
80		import java.util.concurrent.Callable;
81		import java.util.concurrent.CountDownLatch;
82		import java.util.concurrent.CyclicBarrier;
83		import java.util.concurrent.ExecutionException;
84	+	import java.util.concurrent.Executor;
85		import java.util.concurrent.Executors;
86		import java.util.concurrent.ExecutorService;
87		import java.util.concurrent.ForkJoinPool;
88		import java.util.concurrent.Future;
89	+	import java.util.concurrent.FutureTask;
90		import java.util.concurrent.RecursiveAction;
91		import java.util.concurrent.RecursiveTask;
92	+	import java.util.concurrent.RejectedExecutionException;
93		import java.util.concurrent.RejectedExecutionHandler;
94		import java.util.concurrent.Semaphore;
95	+	import java.util.concurrent.ScheduledExecutorService;
96	+	import java.util.concurrent.ScheduledFuture;
97	+	import java.util.concurrent.SynchronousQueue;
98		import java.util.concurrent.ThreadFactory;
99	+	import java.util.concurrent.ThreadLocalRandom;
100		import java.util.concurrent.ThreadPoolExecutor;
101	+	import java.util.concurrent.TimeUnit;
102		import java.util.concurrent.TimeoutException;
103	+	import java.util.concurrent.atomic.AtomicBoolean;
104		import java.util.concurrent.atomic.AtomicReference;
105		import java.util.regex.Pattern;
106
56	–	import junit.framework.AssertionFailedError;
107		import junit.framework.Test;
108		import junit.framework.TestCase;
109		import junit.framework.TestResult;
#	Line 69 | Line 119 | import junit.framework.TestSuite;
119		*
120		* <ol>
121		*
122	<	* <li>All assertions in code running in generated threads must use
123	<	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
124	<	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
125	<	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
126	<	* particularly recommended) for other code to use these forms too.
127	<	* Only the most typically used JUnit assertion methods are defined
128	<	* this way, but enough to live with.
122	>	* <li>All code not running in the main test thread (manually spawned threads
123	>	* or the common fork join pool) must be checked for failure (and completion!).
124	>	* Mechanisms that can be used to ensure this are:
125	>	*   <ol>
126	>	*   <li>Signalling via a synchronizer like AtomicInteger or CountDownLatch
127	>	*    that the task completed normally, which is checked before returning from
128	>	*    the test method in the main thread.
129	>	*   <li>Using the forms {@link #threadFail}, {@link #threadAssertTrue},
130	>	*    or {@link #threadAssertNull}, (not {@code fail}, {@code assertTrue}, etc.)
131	>	*    Only the most typically used JUnit assertion methods are defined
132	>	*    this way, but enough to live with.
133	>	*   <li>Recording failure explicitly using {@link #threadUnexpectedException}
134	>	*    or {@link #threadRecordFailure}.
135	>	*   <li>Using a wrapper like CheckedRunnable that uses one the mechanisms above.
136	>	*   </ol>
137		*
138		* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
139		* to invoke {@code super.setUp} and {@code super.tearDown} within
#	Line 93 | Line 151 | import junit.framework.TestSuite;
151		* but even so, if there is ever any doubt, they can all be increased
152		* in one spot to rerun tests on slower platforms.
153		*
154	+	* Class Item is used for elements of collections and related
155	+	* purposes. Many tests rely on themir keys being equal to ints. To
156	+	* check these, methods mustEqual, mustContain, etc adapt the JUnit
157	+	* assert methods to intercept ints.
158	+	*
159		* <li>All threads generated must be joined inside each test case
160		* method (or {@code fail} to do so) before returning from the
161		* method. The {@code joinPool} method can be used to do this when
#	Line 108 | Line 171 | import junit.framework.TestSuite;
171		* methods as there are exceptions the method can throw. Sometimes
172		* there are multiple tests per JSR166 method when the different
173		* "normal" behaviors differ significantly. And sometimes testcases
174	<	* cover multiple methods when they cannot be tested in
112	<	* isolation.
174	>	* cover multiple methods when they cannot be tested in isolation.
175		*
176		* <li>The documentation style for testcases is to provide as javadoc
177		* a simple sentence or two describing the property that the testcase
#	Line 172 | Line 234 | public class JSR166TestCase extends Test
234		private static final int suiteRuns =
235		Integer.getInteger("jsr166.suiteRuns", 1);
236
237	+	/**
238	+	* Returns the value of the system property, or NaN if not defined.
239	+	*/
240	+	private static float systemPropertyValue(String name) {
241	+	String floatString = System.getProperty(name);
242	+	if (floatString == null)
243	+	return Float.NaN;
244	+	try {
245	+	return Float.parseFloat(floatString);
246	+	} catch (NumberFormatException ex) {
247	+	throw new IllegalArgumentException(
248	+	String.format("Bad float value in system property %s=%s",
249	+	name, floatString));
250	+	}
251	+	}
252	+
253	+	private static final ThreadMXBean THREAD_MXBEAN
254	+	= ManagementFactory.getThreadMXBean();
255	+
256	+	/**
257	+	* The scaling factor to apply to standard delays used in tests.
258	+	* May be initialized from any of:
259	+	* - the "jsr166.delay.factor" system property
260	+	* - the "test.timeout.factor" system property (as used by jtreg)
261	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
262	+	* - hard-coded fuzz factor when using a known slowpoke VM
263	+	*/
264	+	private static final float delayFactor = delayFactor();
265	+
266	+	private static float delayFactor() {
267	+	float x;
268	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
269	+	return x;
270	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
271	+	return x;
272	+	String prop = System.getProperty("java.vm.version");
273	+	if (prop != null && prop.matches(".*debug.*"))
274	+	return 4.0f; // How much slower is fastdebug than product?!
275	+	return 1.0f;
276	+	}
277	+
278		public JSR166TestCase() { super(); }
279		public JSR166TestCase(String name) { super(name); }
280
#	Line 187 | Line 290 | public class JSR166TestCase extends Test
290		return (regex == null) ? null : Pattern.compile(regex);
291		}
292
293	+	// Instrumentation to debug very rare, but very annoying hung test runs.
294	+	static volatile TestCase currentTestCase;
295	+	// static volatile int currentRun = 0;
296	+	static {
297	+	Runnable wedgedTestDetector = new Runnable() { public void run() {
298	+	// Avoid spurious reports with enormous runsPerTest.
299	+	// A single test case run should never take more than 1 second.
300	+	// But let's cap it at the high end too ...
301	+	final int timeoutMinutesMin = Math.max(runsPerTest / 60, 1)
302	+	* Math.max((int) delayFactor, 1);
303	+	final int timeoutMinutes = Math.min(15, timeoutMinutesMin);
304	+	for (TestCase lastTestCase = currentTestCase;;) {
305	+	try { MINUTES.sleep(timeoutMinutes); }
306	+	catch (InterruptedException unexpected) { break; }
307	+	if (lastTestCase == currentTestCase) {
308	+	System.err.printf(
309	+	"Looks like we're stuck running test: %s%n",
310	+	lastTestCase);
311	+	//                     System.err.printf(
312	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
313	+	//                         lastTestCase, currentRun, runsPerTest);
314	+	//                     System.err.println("availableProcessors=" +
315	+	//                         Runtime.getRuntime().availableProcessors());
316	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
317	+	dumpTestThreads();
318	+	// one stack dump is probably enough; more would be spam
319	+	break;
320	+	}
321	+	lastTestCase = currentTestCase;
322	+	}}};
323	+	Thread thread = new Thread(wedgedTestDetector, "WedgedTestDetector");
324	+	thread.setDaemon(true);
325	+	thread.start();
326	+	}
327	+
328	+	//     public static String cpuModel() {
329	+	//         try {
330	+	//             java.util.regex.Matcher matcher
331	+	//               = Pattern.compile("model name\\s*: (.*)")
332	+	//                 .matcher(new String(
333	+	//                     java.nio.file.Files.readAllBytes(
334	+	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
335	+	//             matcher.find();
336	+	//             return matcher.group(1);
337	+	//         } catch (Exception ex) { return null; }
338	+	//     }
339	+
340		public void runBare() throws Throwable {
341	+	currentTestCase = this;
342		if (methodFilter == null
343		|| methodFilter.matcher(toString()).find())
344		super.runBare();
#	Line 195 | Line 346 | public class JSR166TestCase extends Test
346
347		protected void runTest() throws Throwable {
348		for (int i = 0; i < runsPerTest; i++) {
349	+	// currentRun = i;
350		if (profileTests)
351		runTestProfiled();
352		else
#	Line 212 | Line 364 | public class JSR166TestCase extends Test
364		// Never report first run of any test; treat it as a
365		// warmup run, notably to trigger all needed classloading,
366		if (i > 0)
367	<	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
367	>	System.out.printf("%s: %d%n", toString(), elapsedMillis);
368		}
369		}
370
#	Line 223 | Line 375 | public class JSR166TestCase extends Test
375		main(suite(), args);
376		}
377
378	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
379	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
380	+	long runTime;
381	+	public void startTest(Test test) {}
382	+	protected void printHeader(long runTime) {
383	+	this.runTime = runTime; // defer printing for later
384	+	}
385	+	protected void printFooter(TestResult result) {
386	+	if (result.wasSuccessful()) {
387	+	getWriter().println("OK (" + result.runCount() + " tests)"
388	+	+ "  Time: " + elapsedTimeAsString(runTime));
389	+	} else {
390	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
391	+	super.printFooter(result);
392	+	}
393	+	}
394	+	}
395	+
396	+	/**
397	+	* Returns a TestRunner that doesn't bother with unnecessary
398	+	* fluff, like printing a "." for each test case.
399	+	*/
400	+	static junit.textui.TestRunner newPithyTestRunner() {
401	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
402	+	runner.setPrinter(new PithyResultPrinter(System.out));
403	+	return runner;
404	+	}
405	+
406		/**
407		* Runs all unit tests in the given test suite.
408		* Actual behavior influenced by jsr166.* system properties.
#	Line 234 | Line 414 | public class JSR166TestCase extends Test
414		System.setSecurityManager(new SecurityManager());
415		}
416		for (int i = 0; i < suiteRuns; i++) {
417	<	TestResult result = junit.textui.TestRunner.run(suite);
417	>	TestResult result = newPithyTestRunner().doRun(suite);
418		if (!result.wasSuccessful())
419		System.exit(1);
420		System.gc();
#	Line 260 | Line 440 | public class JSR166TestCase extends Test
440		for (String testClassName : testClassNames) {
441		try {
442		Class<?> testClass = Class.forName(testClassName);
443	<	Method m = testClass.getDeclaredMethod("suite",
264	<	new Class<?>[0]);
443	>	Method m = testClass.getDeclaredMethod("suite");
444		suite.addTest(newTestSuite((Test)m.invoke(null)));
445	<	} catch (Exception e) {
446	<	throw new Error("Missing test class", e);
445	>	} catch (ReflectiveOperationException e) {
446	>	throw new AssertionError("Missing test class", e);
447		}
448		}
449		}
#	Line 286 | Line 465 | public class JSR166TestCase extends Test
465		}
466		}
467
468	<	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
469	<	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
470	<	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
471	<	public static boolean atLeastJava9() {
472	<	return JAVA_CLASS_VERSION >= 53.0
473	<	// As of 2015-09, java9 still uses 52.0 class file version
474	<	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
475	<	}
476	<	public static boolean atLeastJava10() {
477	<	return JAVA_CLASS_VERSION >= 54.0
478	<	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
479	<	}
468	>	public static boolean atLeastJava6()  { return JAVA_CLASS_VERSION >= 50.0; }
469	>	public static boolean atLeastJava7()  { return JAVA_CLASS_VERSION >= 51.0; }
470	>	public static boolean atLeastJava8()  { return JAVA_CLASS_VERSION >= 52.0; }
471	>	public static boolean atLeastJava9()  { return JAVA_CLASS_VERSION >= 53.0; }
472	>	public static boolean atLeastJava10() { return JAVA_CLASS_VERSION >= 54.0; }
473	>	public static boolean atLeastJava11() { return JAVA_CLASS_VERSION >= 55.0; }
474	>	public static boolean atLeastJava12() { return JAVA_CLASS_VERSION >= 56.0; }
475	>	public static boolean atLeastJava13() { return JAVA_CLASS_VERSION >= 57.0; }
476	>	public static boolean atLeastJava14() { return JAVA_CLASS_VERSION >= 58.0; }
477	>	public static boolean atLeastJava15() { return JAVA_CLASS_VERSION >= 59.0; }
478	>	public static boolean atLeastJava16() { return JAVA_CLASS_VERSION >= 60.0; }
479	>	public static boolean atLeastJava17() { return JAVA_CLASS_VERSION >= 61.0; }
480
481		/**
482		* Collects all JSR166 unit tests as one suite.
#	Line 318 | Line 497 | public class JSR166TestCase extends Test
497		AbstractQueuedLongSynchronizerTest.suite(),
498		ArrayBlockingQueueTest.suite(),
499		ArrayDequeTest.suite(),
500	+	ArrayListTest.suite(),
501		AtomicBooleanTest.suite(),
502		AtomicIntegerArrayTest.suite(),
503		AtomicIntegerFieldUpdaterTest.suite(),
#	Line 340 | Line 520 | public class JSR166TestCase extends Test
520		CopyOnWriteArrayListTest.suite(),
521		CopyOnWriteArraySetTest.suite(),
522		CountDownLatchTest.suite(),
523	+	CountedCompleterTest.suite(),
524		CyclicBarrierTest.suite(),
525		DelayQueueTest.suite(),
526		EntryTest.suite(),
#	Line 347 | Line 528 | public class JSR166TestCase extends Test
528		ExecutorsTest.suite(),
529		ExecutorCompletionServiceTest.suite(),
530		FutureTaskTest.suite(),
531	+	HashtableTest.suite(),
532		LinkedBlockingDequeTest.suite(),
533		LinkedBlockingQueueTest.suite(),
534		LinkedListTest.suite(),
#	Line 368 | Line 550 | public class JSR166TestCase extends Test
550		TreeMapTest.suite(),
551		TreeSetTest.suite(),
552		TreeSubMapTest.suite(),
553	<	TreeSubSetTest.suite());
553	>	TreeSubSetTest.suite(),
554	>	VectorTest.suite());
555
556		// Java8+ test classes
557		if (atLeastJava8()) {
558		String[] java8TestClassNames = {
559	+	"ArrayDeque8Test",
560		"Atomic8Test",
561		"CompletableFutureTest",
562		"ConcurrentHashMap8Test",
563	<	"CountedCompleterTest",
563	>	"CountedCompleter8Test",
564		"DoubleAccumulatorTest",
565		"DoubleAdderTest",
566		"ForkJoinPool8Test",
567		"ForkJoinTask8Test",
568	+	"HashMapTest",
569	+	"LinkedBlockingDeque8Test",
570	+	"LinkedBlockingQueue8Test",
571	+	"LinkedHashMapTest",
572		"LongAccumulatorTest",
573		"LongAdderTest",
574		"SplittableRandomTest",
575		"StampedLockTest",
576		"SubmissionPublisherTest",
577		"ThreadLocalRandom8Test",
578	+	"TimeUnit8Test",
579		};
580		addNamedTestClasses(suite, java8TestClassNames);
581		}
#	Line 394 | Line 583 | public class JSR166TestCase extends Test
583		// Java9+ test classes
584		if (atLeastJava9()) {
585		String[] java9TestClassNames = {
586	<	// Currently empty, but expecting varhandle tests
586	>	"AtomicBoolean9Test",
587	>	"AtomicInteger9Test",
588	>	"AtomicIntegerArray9Test",
589	>	"AtomicLong9Test",
590	>	"AtomicLongArray9Test",
591	>	"AtomicReference9Test",
592	>	"AtomicReferenceArray9Test",
593	>	"ExecutorCompletionService9Test",
594	>	"ForkJoinPool9Test",
595		};
596		addNamedTestClasses(suite, java9TestClassNames);
597		}
#	Line 405 | Line 602 | public class JSR166TestCase extends Test
602		/** Returns list of junit-style test method names in given class. */
603		public static ArrayList<String> testMethodNames(Class<?> testClass) {
604		Method[] methods = testClass.getDeclaredMethods();
605	<	ArrayList<String> names = new ArrayList<String>(methods.length);
605	>	ArrayList<String> names = new ArrayList<>(methods.length);
606		for (Method method : methods) {
607		if (method.getName().startsWith("test")
608		&& Modifier.isPublic(method.getModifiers())
#	Line 432 | Line 629 | public class JSR166TestCase extends Test
629		for (String methodName : testMethodNames(testClass))
630		suite.addTest((Test) c.newInstance(data, methodName));
631		return suite;
632	<	} catch (Exception e) {
633	<	throw new Error(e);
632	>	} catch (ReflectiveOperationException e) {
633	>	throw new AssertionError(e);
634		}
635		}
636
#	Line 449 | Line 646 | public class JSR166TestCase extends Test
646		if (atLeastJava8()) {
647		String name = testClass.getName();
648		String name8 = name.replaceAll("Test$", "8Test");
649	<	if (name.equals(name8)) throw new Error(name);
649	>	if (name.equals(name8)) throw new AssertionError(name);
650		try {
651		return (Test)
652		Class.forName(name8)
653	<	.getMethod("testSuite", new Class[] { dataClass })
653	>	.getMethod("testSuite", dataClass)
654		.invoke(null, data);
655	<	} catch (Exception e) {
656	<	throw new Error(e);
655	>	} catch (ReflectiveOperationException e) {
656	>	throw new AssertionError(e);
657		}
658		} else {
659		return new TestSuite();
#	Line 471 | Line 668 | public class JSR166TestCase extends Test
668		public static long LONG_DELAY_MS;
669
670		/**
671	<	* Returns the shortest timed delay. This could
672	<	* be reimplemented to use for example a Property.
671	>	* A delay significantly longer than LONG_DELAY_MS.
672	>	* Use this in a thread that is waited for via awaitTermination(Thread).
673	>	*/
674	>	public static long LONGER_DELAY_MS;
675	>
676	>	private static final long RANDOM_TIMEOUT;
677	>	private static final long RANDOM_EXPIRED_TIMEOUT;
678	>	private static final TimeUnit RANDOM_TIMEUNIT;
679	>	static {
680	>	ThreadLocalRandom rnd = ThreadLocalRandom.current();
681	>	long[] timeouts = { Long.MIN_VALUE, -1, 0, 1, Long.MAX_VALUE };
682	>	RANDOM_TIMEOUT = timeouts[rnd.nextInt(timeouts.length)];
683	>	RANDOM_EXPIRED_TIMEOUT = timeouts[rnd.nextInt(3)];
684	>	TimeUnit[] timeUnits = TimeUnit.values();
685	>	RANDOM_TIMEUNIT = timeUnits[rnd.nextInt(timeUnits.length)];
686	>	}
687	>
688	>	/**
689	>	* Returns a timeout for use when any value at all will do.
690	>	*/
691	>	static long randomTimeout() { return RANDOM_TIMEOUT; }
692	>
693	>	/**
694	>	* Returns a timeout that means "no waiting", i.e. not positive.
695	>	*/
696	>	static long randomExpiredTimeout() { return RANDOM_EXPIRED_TIMEOUT; }
697	>
698	>	/**
699	>	* Returns a random non-null TimeUnit.
700	>	*/
701	>	static TimeUnit randomTimeUnit() { return RANDOM_TIMEUNIT; }
702	>
703	>	/**
704	>	* Returns a random boolean; a "coin flip".
705	>	*/
706	>	static boolean randomBoolean() {
707	>	return ThreadLocalRandom.current().nextBoolean();
708	>	}
709	>
710	>	/**
711	>	* Returns a random element from given choices.
712	>	*/
713	>	<T> T chooseRandomly(List<T> choices) {
714	>	return choices.get(ThreadLocalRandom.current().nextInt(choices.size()));
715	>	}
716	>
717	>	/**
718	>	* Returns a random element from given choices.
719	>	*/
720	>	@SuppressWarnings("unchecked")
721	>	<T> T chooseRandomly(T... choices) {
722	>	return choices[ThreadLocalRandom.current().nextInt(choices.length)];
723	>	}
724	>
725	>	/**
726	>	* Returns the shortest timed delay. This can be scaled up for
727	>	* slow machines using the jsr166.delay.factor system property,
728	>	* or via jtreg's -timeoutFactor: flag.
729	>	* http://openjdk.java.net/jtreg/command-help.html
730		*/
731		protected long getShortDelay() {
732	<	return 50;
732	>	return (long) (50 * delayFactor);
733		}
734
735		/**
#	Line 486 | Line 740 | public class JSR166TestCase extends Test
740		SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
741		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
742		LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
743	+	LONGER_DELAY_MS = 2 * LONG_DELAY_MS;
744		}
745
746	+	private static final long TIMEOUT_DELAY_MS
747	+	= (long) (12.0 * Math.cbrt(delayFactor));
748	+
749		/**
750	<	* Returns a timeout in milliseconds to be used in tests that
751	<	* verify that operations block or time out.
750	>	* Returns a timeout in milliseconds to be used in tests that verify
751	>	* that operations block or time out.  We want this to be longer
752	>	* than the OS scheduling quantum, but not too long, so don't scale
753	>	* linearly with delayFactor; we use "crazy" cube root instead.
754		*/
755	<	long timeoutMillis() {
756	<	return SHORT_DELAY_MS / 4;
755	>	static long timeoutMillis() {
756	>	return TIMEOUT_DELAY_MS;
757		}
758
759		/**
#	Line 509 | Line 769 | public class JSR166TestCase extends Test
769		* The first exception encountered if any threadAssertXXX method fails.
770		*/
771		private final AtomicReference<Throwable> threadFailure
772	<	= new AtomicReference<Throwable>(null);
772	>	= new AtomicReference<>(null);
773
774		/**
775		* Records an exception so that it can be rethrown later in the test
#	Line 518 | Line 778 | public class JSR166TestCase extends Test
778		* the same test have no effect.
779		*/
780		public void threadRecordFailure(Throwable t) {
781	<	threadDump();
782	<	threadFailure.compareAndSet(null, t);
781	>	System.err.println(t);
782	>	if (threadFailure.compareAndSet(null, t))
783	>	dumpTestThreads();
784		}
785
786		public void setUp() {
#	Line 529 | Line 790 | public class JSR166TestCase extends Test
790		void tearDownFail(String format, Object... args) {
791		String msg = toString() + ": " + String.format(format, args);
792		System.err.println(msg);
793	<	threadDump();
794	<	throw new AssertionFailedError(msg);
793	>	dumpTestThreads();
794	>	throw new AssertionError(msg);
795		}
796
797		/**
#	Line 551 | Line 812 | public class JSR166TestCase extends Test
812		throw (RuntimeException) t;
813		else if (t instanceof Exception)
814		throw (Exception) t;
815	<	else {
816	<	AssertionFailedError afe =
556	<	new AssertionFailedError(t.toString());
557	<	afe.initCause(t);
558	<	throw afe;
559	<	}
815	>	else
816	>	throw new AssertionError(t.toString(), t);
817		}
818
819		if (Thread.interrupted())
#	Line 566 | Line 823 | public class JSR166TestCase extends Test
823		}
824
825		/**
826	<	* Finds missing try { ... } finally { joinPool(e); }
826	>	* Finds missing PoolCleaners
827		*/
828		void checkForkJoinPoolThreadLeaks() throws InterruptedException {
829		Thread[] survivors = new Thread[7];
#	Line 590 | Line 847 | public class JSR166TestCase extends Test
847
848		/**
849		* Just like fail(reason), but additionally recording (using
850	<	* threadRecordFailure) any AssertionFailedError thrown, so that
851	<	* the current testcase will fail.
850	>	* threadRecordFailure) any AssertionError thrown, so that the
851	>	* current testcase will fail.
852		*/
853		public void threadFail(String reason) {
854		try {
855		fail(reason);
856	<	} catch (AssertionFailedError t) {
857	<	threadRecordFailure(t);
858	<	throw t;
856	>	} catch (AssertionError fail) {
857	>	threadRecordFailure(fail);
858	>	throw fail;
859		}
860		}
861
862		/**
863		* Just like assertTrue(b), but additionally recording (using
864	<	* threadRecordFailure) any AssertionFailedError thrown, so that
865	<	* the current testcase will fail.
864	>	* threadRecordFailure) any AssertionError thrown, so that the
865	>	* current testcase will fail.
866		*/
867		public void threadAssertTrue(boolean b) {
868		try {
869		assertTrue(b);
870	<	} catch (AssertionFailedError t) {
871	<	threadRecordFailure(t);
872	<	throw t;
870	>	} catch (AssertionError fail) {
871	>	threadRecordFailure(fail);
872	>	throw fail;
873		}
874		}
875
876		/**
877		* Just like assertFalse(b), but additionally recording (using
878	<	* threadRecordFailure) any AssertionFailedError thrown, so that
879	<	* the current testcase will fail.
878	>	* threadRecordFailure) any AssertionError thrown, so that the
879	>	* current testcase will fail.
880		*/
881		public void threadAssertFalse(boolean b) {
882		try {
883		assertFalse(b);
884	<	} catch (AssertionFailedError t) {
885	<	threadRecordFailure(t);
886	<	throw t;
884	>	} catch (AssertionError fail) {
885	>	threadRecordFailure(fail);
886	>	throw fail;
887		}
888		}
889
890		/**
891		* Just like assertNull(x), but additionally recording (using
892	<	* threadRecordFailure) any AssertionFailedError thrown, so that
893	<	* the current testcase will fail.
892	>	* threadRecordFailure) any AssertionError thrown, so that the
893	>	* current testcase will fail.
894		*/
895		public void threadAssertNull(Object x) {
896		try {
897		assertNull(x);
898	<	} catch (AssertionFailedError t) {
899	<	threadRecordFailure(t);
900	<	throw t;
898	>	} catch (AssertionError fail) {
899	>	threadRecordFailure(fail);
900	>	throw fail;
901		}
902		}
903
904		/**
905		* Just like assertEquals(x, y), but additionally recording (using
906	<	* threadRecordFailure) any AssertionFailedError thrown, so that
907	<	* the current testcase will fail.
906	>	* threadRecordFailure) any AssertionError thrown, so that the
907	>	* current testcase will fail.
908		*/
909		public void threadAssertEquals(long x, long y) {
910		try {
911		assertEquals(x, y);
912	<	} catch (AssertionFailedError t) {
913	<	threadRecordFailure(t);
914	<	throw t;
912	>	} catch (AssertionError fail) {
913	>	threadRecordFailure(fail);
914	>	throw fail;
915		}
916		}
917
918		/**
919		* Just like assertEquals(x, y), but additionally recording (using
920	<	* threadRecordFailure) any AssertionFailedError thrown, so that
921	<	* the current testcase will fail.
920	>	* threadRecordFailure) any AssertionError thrown, so that the
921	>	* current testcase will fail.
922		*/
923		public void threadAssertEquals(Object x, Object y) {
924		try {
925		assertEquals(x, y);
926	<	} catch (AssertionFailedError fail) {
926	>	} catch (AssertionError fail) {
927		threadRecordFailure(fail);
928		throw fail;
929		} catch (Throwable fail) {
#	Line 676 | Line 933 | public class JSR166TestCase extends Test
933
934		/**
935		* Just like assertSame(x, y), but additionally recording (using
936	<	* threadRecordFailure) any AssertionFailedError thrown, so that
937	<	* the current testcase will fail.
936	>	* threadRecordFailure) any AssertionError thrown, so that the
937	>	* current testcase will fail.
938		*/
939		public void threadAssertSame(Object x, Object y) {
940		try {
941		assertSame(x, y);
942	<	} catch (AssertionFailedError fail) {
942	>	} catch (AssertionError fail) {
943		threadRecordFailure(fail);
944		throw fail;
945		}
#	Line 704 | Line 961 | public class JSR166TestCase extends Test
961
962		/**
963		* Records the given exception using {@link #threadRecordFailure},
964	<	* then rethrows the exception, wrapping it in an
965	<	* AssertionFailedError if necessary.
964	>	* then rethrows the exception, wrapping it in an AssertionError
965	>	* if necessary.
966		*/
967		public void threadUnexpectedException(Throwable t) {
968		threadRecordFailure(t);
#	Line 714 | Line 971 | public class JSR166TestCase extends Test
971		throw (RuntimeException) t;
972		else if (t instanceof Error)
973		throw (Error) t;
974	<	else {
975	<	AssertionFailedError afe =
719	<	new AssertionFailedError("unexpected exception: " + t);
720	<	afe.initCause(t);
721	<	throw afe;
722	<	}
974	>	else
975	>	throw new AssertionError("unexpected exception: " + t, t);
976		}
977
978		/**
979		* Delays, via Thread.sleep, for the given millisecond delay, but
980		* if the sleep is shorter than specified, may re-sleep or yield
981	<	* until time elapses.
981	>	* until time elapses.  Ensures that the given time, as measured
982	>	* by System.nanoTime(), has elapsed.
983		*/
984		static void delay(long millis) throws InterruptedException {
985	<	long startTime = System.nanoTime();
986	<	long ns = millis * 1000 * 1000;
987	<	for (;;) {
985	>	long nanos = millis * (1000 * 1000);
986	>	final long wakeupTime = System.nanoTime() + nanos;
987	>	do {
988		if (millis > 0L)
989		Thread.sleep(millis);
990		else // too short to sleep
991		Thread.yield();
992	<	long d = ns - (System.nanoTime() - startTime);
993	<	if (d > 0L)
994	<	millis = d / (1000 * 1000);
741	<	else
742	<	break;
743	<	}
992	>	nanos = wakeupTime - System.nanoTime();
993	>	millis = nanos / (1000 * 1000);
994	>	} while (nanos >= 0L);
995		}
996
997		/**
998		* Allows use of try-with-resources with per-test thread pools.
999		*/
1000	<	static class PoolCloser<T extends ExecutorService>
1001	<	implements AutoCloseable {
1002	<	public final T pool;
752	<	public PoolCloser(T pool) { this.pool = pool; }
1000	>	class PoolCleaner implements AutoCloseable {
1001	>	private final ExecutorService pool;
1002	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
1003		public void close() { joinPool(pool); }
1004		}
1005
1006		/**
1007	+	* An extension of PoolCleaner that has an action to release the pool.
1008	+	*/
1009	+	class PoolCleanerWithReleaser extends PoolCleaner {
1010	+	private final Runnable releaser;
1011	+	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
1012	+	super(pool);
1013	+	this.releaser = releaser;
1014	+	}
1015	+	public void close() {
1016	+	try {
1017	+	releaser.run();
1018	+	} finally {
1019	+	super.close();
1020	+	}
1021	+	}
1022	+	}
1023	+
1024	+	PoolCleaner cleaner(ExecutorService pool) {
1025	+	return new PoolCleaner(pool);
1026	+	}
1027	+
1028	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
1029	+	return new PoolCleanerWithReleaser(pool, releaser);
1030	+	}
1031	+
1032	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
1033	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
1034	+	}
1035	+
1036	+	Runnable releaser(final CountDownLatch latch) {
1037	+	return new Runnable() { public void run() {
1038	+	do { latch.countDown(); }
1039	+	while (latch.getCount() > 0);
1040	+	}};
1041	+	}
1042	+
1043	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
1044	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
1045	+	}
1046	+
1047	+	Runnable releaser(final AtomicBoolean flag) {
1048	+	return new Runnable() { public void run() { flag.set(true); }};
1049	+	}
1050	+
1051	+	/**
1052		* Waits out termination of a thread pool or fails doing so.
1053		*/
1054	<	static void joinPool(ExecutorService pool) {
1054	>	void joinPool(ExecutorService pool) {
1055		try {
1056		pool.shutdown();
1057	<	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS))
1058	<	fail("ExecutorService " + pool +
1059	<	" did not terminate in a timely manner");
1057	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
1058	>	try {
1059	>	threadFail("ExecutorService " + pool +
1060	>	" did not terminate in a timely manner");
1061	>	} finally {
1062	>	// last resort, for the benefit of subsequent tests
1063	>	pool.shutdownNow();
1064	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
1065	>	}
1066	>	}
1067		} catch (SecurityException ok) {
1068		// Allowed in case test doesn't have privs
1069		} catch (InterruptedException fail) {
1070	<	fail("Unexpected InterruptedException");
1070	>	threadFail("Unexpected InterruptedException");
1071		}
1072		}
1073
1074	<	/** Like Runnable, but with the freedom to throw anything */
1074	>	/**
1075	>	* Like Runnable, but with the freedom to throw anything.
1076	>	* junit folks had the same idea:
1077	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
1078	>	*/
1079		interface Action { public void run() throws Throwable; }
1080
1081		/**
#	Line 778 | Line 1084 | public class JSR166TestCase extends Test
1084		* necessarily individually slow because they must block.
1085		*/
1086		void testInParallel(Action ... actions) {
1087	<	try (PoolCloser<ExecutorService> poolCloser
1088	<	= new PoolCloser<>(Executors.newCachedThreadPool())) {
783	<	ExecutorService pool = poolCloser.pool;
1087	>	ExecutorService pool = Executors.newCachedThreadPool();
1088	>	try (PoolCleaner cleaner = cleaner(pool)) {
1089		ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1090		for (final Action action : actions)
1091		futures.add(pool.submit(new CheckedRunnable() {
#	Line 796 | Line 1101 | public class JSR166TestCase extends Test
1101		}
1102		}
1103
1104	+	/** Returns true if thread info might be useful in a thread dump. */
1105	+	static boolean threadOfInterest(ThreadInfo info) {
1106	+	final String name = info.getThreadName();
1107	+	String lockName;
1108	+	if (name == null)
1109	+	return true;
1110	+	if (name.equals("Signal Dispatcher")
1111	+	|| name.equals("WedgedTestDetector"))
1112	+	return false;
1113	+	if (name.equals("Reference Handler")) {
1114	+	// Reference Handler stacktrace changed in JDK-8156500
1115	+	StackTraceElement[] stackTrace; String methodName;
1116	+	if ((stackTrace = info.getStackTrace()) != null
1117	+	&& stackTrace.length > 0
1118	+	&& (methodName = stackTrace[0].getMethodName()) != null
1119	+	&& methodName.equals("waitForReferencePendingList"))
1120	+	return false;
1121	+	// jdk8 Reference Handler stacktrace
1122	+	if ((lockName = info.getLockName()) != null
1123	+	&& lockName.startsWith("java.lang.ref"))
1124	+	return false;
1125	+	}
1126	+	if ((name.equals("Finalizer") || name.equals("Common-Cleaner"))
1127	+	&& (lockName = info.getLockName()) != null
1128	+	&& lockName.startsWith("java.lang.ref"))
1129	+	return false;
1130	+	if (name.startsWith("ForkJoinPool.commonPool-worker")
1131	+	&& (lockName = info.getLockName()) != null
1132	+	&& lockName.startsWith("java.util.concurrent.ForkJoinPool"))
1133	+	return false;
1134	+	return true;
1135	+	}
1136	+
1137		/**
1138	<	* A debugging tool to print all stack traces, as jstack does.
1138	>	* A debugging tool to print stack traces of most threads, as jstack does.
1139		* Uninteresting threads are filtered out.
1140		*/
1141	<	static void threadDump() {
1142	<	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1143	<	System.err.println("------ stacktrace dump start ------");
1144	<	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1145	<	String name = info.getThreadName();
1146	<	if ("Signal Dispatcher".equals(name))
1147	<	continue;
1148	<	if ("Reference Handler".equals(name)
811	<	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
812	<	continue;
813	<	if ("Finalizer".equals(name)
814	<	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
815	<	continue;
816	<	System.err.print(info);
1141	>	static void dumpTestThreads() {
1142	>	SecurityManager sm = System.getSecurityManager();
1143	>	if (sm != null) {
1144	>	try {
1145	>	System.setSecurityManager(null);
1146	>	} catch (SecurityException giveUp) {
1147	>	return;
1148	>	}
1149		}
1150	+
1151	+	System.err.println("------ stacktrace dump start ------");
1152	+	for (ThreadInfo info : THREAD_MXBEAN.dumpAllThreads(true, true))
1153	+	if (threadOfInterest(info))
1154	+	System.err.print(info);
1155		System.err.println("------ stacktrace dump end ------");
819	–	}
1156
1157	<	/**
822	<	* Checks that thread does not terminate within the default
823	<	* millisecond delay of {@code timeoutMillis()}.
824	<	*/
825	<	void assertThreadStaysAlive(Thread thread) {
826	<	assertThreadStaysAlive(thread, timeoutMillis());
1157	>	if (sm != null) System.setSecurityManager(sm);
1158		}
1159
1160		/**
1161	<	* Checks that thread does not terminate within the given millisecond delay.
1161	>	* Checks that thread eventually enters the expected blocked thread state.
1162		*/
1163	<	void assertThreadStaysAlive(Thread thread, long millis) {
1164	<	try {
1165	<	// No need to optimize the failing case via Thread.join.
1166	<	delay(millis);
1167	<	assertTrue(thread.isAlive());
1168	<	} catch (InterruptedException fail) {
1169	<	fail("Unexpected InterruptedException");
1163	>	void assertThreadBlocks(Thread thread, Thread.State expected) {
1164	>	// always sleep at least 1 ms, with high probability avoiding
1165	>	// transitory states
1166	>	for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
1167	>	try { delay(1); }
1168	>	catch (InterruptedException fail) {
1169	>	throw new AssertionError("Unexpected InterruptedException", fail);
1170	>	}
1171	>	Thread.State s = thread.getState();
1172	>	if (s == expected)
1173	>	return;
1174	>	else if (s == Thread.State.TERMINATED)
1175	>	fail("Unexpected thread termination");
1176		}
1177	+	fail("timed out waiting for thread to enter thread state " + expected);
1178		}
1179
1180		/**
1181	<	* Checks that the threads do not terminate within the default
844	<	* millisecond delay of {@code timeoutMillis()}.
1181	>	* Returns the thread's blocker's class name, if any, else null.
1182		*/
1183	<	void assertThreadsStayAlive(Thread... threads) {
1184	<	assertThreadsStayAlive(timeoutMillis(), threads);
1185	<	}
1186	<
1187	<	/**
1188	<	* Checks that the threads do not terminate within the given millisecond delay.
852	<	*/
853	<	void assertThreadsStayAlive(long millis, Thread... threads) {
854	<	try {
855	<	// No need to optimize the failing case via Thread.join.
856	<	delay(millis);
857	<	for (Thread thread : threads)
858	<	assertTrue(thread.isAlive());
859	<	} catch (InterruptedException fail) {
860	<	fail("Unexpected InterruptedException");
861	<	}
1183	>	String blockerClassName(Thread thread) {
1184	>	ThreadInfo threadInfo; LockInfo lockInfo;
1185	>	if ((threadInfo = THREAD_MXBEAN.getThreadInfo(thread.getId(), 0)) != null
1186	>	&& (lockInfo = threadInfo.getLockInfo()) != null)
1187	>	return lockInfo.getClassName();
1188	>	return null;
1189		}
1190
1191		/**
1192		* Checks that future.get times out, with the default timeout of
1193		* {@code timeoutMillis()}.
1194		*/
1195	<	void assertFutureTimesOut(Future future) {
1195	>	void assertFutureTimesOut(Future<?> future) {
1196		assertFutureTimesOut(future, timeoutMillis());
1197		}
1198
1199		/**
1200		* Checks that future.get times out, with the given millisecond timeout.
1201		*/
1202	<	void assertFutureTimesOut(Future future, long timeoutMillis) {
1202	>	void assertFutureTimesOut(Future<?> future, long timeoutMillis) {
1203		long startTime = System.nanoTime();
1204		try {
1205		future.get(timeoutMillis, MILLISECONDS);
#	Line 880 | Line 1207 | public class JSR166TestCase extends Test
1207		} catch (TimeoutException success) {
1208		} catch (Exception fail) {
1209		threadUnexpectedException(fail);
1210	<	} finally { future.cancel(true); }
1210	>	}
1211		assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1212	+	assertFalse(future.isDone());
1213		}
1214
1215		/**
#	Line 899 | Line 1227 | public class JSR166TestCase extends Test
1227		}
1228
1229		/**
1230	<	* The number of elements to place in collections, arrays, etc.
1230	>	* The maximum number of consecutive spurious wakeups we should
1231	>	* tolerate (from APIs like LockSupport.park) before failing a test.
1232		*/
1233	<	public static final int SIZE = 20;
1233	>	static final int MAX_SPURIOUS_WAKEUPS = 10;
1234
1235	<	// Some convenient Integer constants
1235	>	/**
1236	>	* The number of elements to place in collections, arrays, etc.
1237	>	* Must be at least ten;
1238	>	*/
1239	>	public static final int SIZE = 32;
1240
1241	<	public static final Integer zero  = new Integer(0);
1242	<	public static final Integer one   = new Integer(1);
1243	<	public static final Integer two   = new Integer(2);
1244	<	public static final Integer three = new Integer(3);
1245	<	public static final Integer four  = new Integer(4);
1246	<	public static final Integer five  = new Integer(5);
1247	<	public static final Integer six   = new Integer(6);
1248	<	public static final Integer seven = new Integer(7);
1249	<	public static final Integer eight = new Integer(8);
1250	<	public static final Integer nine  = new Integer(9);
1251	<	public static final Integer m1  = new Integer(-1);
1252	<	public static final Integer m2  = new Integer(-2);
1253	<	public static final Integer m3  = new Integer(-3);
1254	<	public static final Integer m4  = new Integer(-4);
1255	<	public static final Integer m5  = new Integer(-5);
1256	<	public static final Integer m6  = new Integer(-6);
1257	<	public static final Integer m10 = new Integer(-10);
1241	>	static Item[] seqItems(int size) {
1242	>	Item[] s = new Item[size];
1243	>	for (int i = 0; i < size; ++i)
1244	>	s[i] = new Item(i);
1245	>	return s;
1246	>	}
1247	>	static Item[] negativeSeqItems(int size) {
1248	>	Item[] s = new Item[size];
1249	>	for (int i = 0; i < size; ++i)
1250	>	s[i] = new Item(-i);
1251	>	return s;
1252	>	}
1253	>
1254	>	// Many tests rely on defaultItems all being sequential nonnegative
1255	>	public static final Item[] defaultItems = seqItems(SIZE);
1256	>
1257	>	static Item itemFor(int i) { // check cache for defaultItems
1258	>	Item[] items = defaultItems;
1259	>	return (i >= 0 && i < items.length) ? items[i] : new Item(i);
1260	>	}
1261	>
1262	>	public static final Item zero  = defaultItems[0];
1263	>	public static final Item one   = defaultItems[1];
1264	>	public static final Item two   = defaultItems[2];
1265	>	public static final Item three = defaultItems[3];
1266	>	public static final Item four  = defaultItems[4];
1267	>	public static final Item five  = defaultItems[5];
1268	>	public static final Item six   = defaultItems[6];
1269	>	public static final Item seven = defaultItems[7];
1270	>	public static final Item eight = defaultItems[8];
1271	>	public static final Item nine  = defaultItems[9];
1272	>	public static final Item ten   = defaultItems[10];
1273	>
1274	>	public static final Item[] negativeItems = negativeSeqItems(SIZE);
1275	>
1276	>	public static final Item minusOne   = negativeItems[1];
1277	>	public static final Item minusTwo   = negativeItems[2];
1278	>	public static final Item minusThree = negativeItems[3];
1279	>	public static final Item minusFour  = negativeItems[4];
1280	>	public static final Item minusFive  = negativeItems[5];
1281	>	public static final Item minusSix   = negativeItems[6];
1282	>	public static final Item minusSeven = negativeItems[7];
1283	>	public static final Item minusEight = negativeItems[8];
1284	>	public static final Item minusNone  = negativeItems[9];
1285	>	public static final Item minusTen   = negativeItems[10];
1286	>
1287	>	// elements expected to be missing
1288	>	public static final Item fortytwo = new Item(42);
1289	>	public static final Item eightysix = new Item(86);
1290	>	public static final Item ninetynine = new Item(99);
1291	>
1292	>	// Interop across Item, int
1293	>
1294	>	static void mustEqual(Item x, Item y) {
1295	>	if (x != y)
1296	>	assertEquals(x.value, y.value);
1297	>	}
1298	>	static void mustEqual(Item x, int y) {
1299	>	assertEquals(x.value, y);
1300	>	}
1301	>	static void mustEqual(int x, Item y) {
1302	>	assertEquals(x, y.value);
1303	>	}
1304	>	static void mustEqual(int x, int y) {
1305	>	assertEquals(x, y);
1306	>	}
1307	>	static void mustEqual(Object x, Object y) {
1308	>	if (x != y)
1309	>	assertEquals(x, y);
1310	>	}
1311	>	static void mustEqual(int x, Object y) {
1312	>	if (y instanceof Item)
1313	>	assertEquals(x, ((Item)y).value);
1314	>	else fail();
1315	>	}
1316	>	static void mustEqual(Object x, int y) {
1317	>	if (x instanceof Item)
1318	>	assertEquals(((Item)x).value, y);
1319	>	else fail();
1320	>	}
1321	>	static void mustEqual(boolean x, boolean y) {
1322	>	assertEquals(x, y);
1323	>	}
1324	>	static void mustEqual(long x, long y) {
1325	>	assertEquals(x, y);
1326	>	}
1327	>	static void mustEqual(double x, double y) {
1328	>	assertEquals(x, y);
1329	>	}
1330	>	static void mustContain(Collection<Item> c, int i) {
1331	>	assertTrue(c.contains(itemFor(i)));
1332	>	}
1333	>	static void mustContain(Collection<Item> c, Item i) {
1334	>	assertTrue(c.contains(i));
1335	>	}
1336	>	static void mustNotContain(Collection<Item> c, int i) {
1337	>	assertFalse(c.contains(itemFor(i)));
1338	>	}
1339	>	static void mustNotContain(Collection<Item> c, Item i) {
1340	>	assertFalse(c.contains(i));
1341	>	}
1342	>	static void mustRemove(Collection<Item> c, int i) {
1343	>	assertTrue(c.remove(itemFor(i)));
1344	>	}
1345	>	static void mustRemove(Collection<Item> c, Item i) {
1346	>	assertTrue(c.remove(i));
1347	>	}
1348	>	static void mustNotRemove(Collection<Item> c, int i) {
1349	>	Item[] items = defaultItems;
1350	>	Item x = (i >= 0 && i < items.length) ? items[i] : new Item(i);
1351	>	assertFalse(c.remove(x));
1352	>	}
1353	>	static void mustNotRemove(Collection<Item> c, Item i) {
1354	>	assertFalse(c.remove(i));
1355	>	}
1356	>	static void mustAdd(Collection<Item> c, int i) {
1357	>	assertTrue(c.add(itemFor(i)));
1358	>	}
1359	>	static void mustAdd(Collection<Item> c, Item i) {
1360	>	assertTrue(c.add(i));
1361	>	}
1362	>	static void mustOffer(Queue<Item> c, int i) {
1363	>	assertTrue(c.offer(itemFor(i)));
1364	>	}
1365	>	static void mustOffer(Queue<Item> c, Item i) {
1366	>	assertTrue(c.offer(i));
1367	>	}
1368
1369		/**
1370		* Runs Runnable r with a security policy that permits precisely
#	Line 1002 | Line 1445 | public class JSR166TestCase extends Test
1445		}
1446		public void refresh() {}
1447		public String toString() {
1448	<	List<Permission> ps = new ArrayList<Permission>();
1448	>	List<Permission> ps = new ArrayList<>();
1449		for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1450		ps.add(e.nextElement());
1451		return "AdjustablePolicy with permissions " + ps;
#	Line 1030 | Line 1473 | public class JSR166TestCase extends Test
1473
1474		/**
1475		* Sleeps until the given time has elapsed.
1476	<	* Throws AssertionFailedError if interrupted.
1476	>	* Throws AssertionError if interrupted.
1477		*/
1478	<	void sleep(long millis) {
1478	>	static void sleep(long millis) {
1479		try {
1480		delay(millis);
1481		} catch (InterruptedException fail) {
1482	<	AssertionFailedError afe =
1040	<	new AssertionFailedError("Unexpected InterruptedException");
1041	<	afe.initCause(fail);
1042	<	throw afe;
1482	>	throw new AssertionError("Unexpected InterruptedException", fail);
1483		}
1484		}
1485
1486		/**
1487		* Spin-waits up to the specified number of milliseconds for the given
1488		* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1489	+	* @param waitingForGodot if non-null, an additional condition to satisfy
1490		*/
1491	<	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1492	<	long startTime = System.nanoTime();
1493	<	for (;;) {
1494	<	Thread.State s = thread.getState();
1495	<	if (s == Thread.State.BLOCKED ||
1496	<	s == Thread.State.WAITING ||
1497	<	s == Thread.State.TIMED_WAITING)
1498	<	return;
1499	<	else if (s == Thread.State.TERMINATED)
1491	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis,
1492	>	Callable<Boolean> waitingForGodot) {
1493	>	for (long startTime = 0L;;) {
1494	>	switch (thread.getState()) {
1495	>	default: break;
1496	>	case BLOCKED: case WAITING: case TIMED_WAITING:
1497	>	try {
1498	>	if (waitingForGodot == null || waitingForGodot.call())
1499	>	return;
1500	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1501	>	break;
1502	>	case TERMINATED:
1503		fail("Unexpected thread termination");
1504	+	}
1505	+
1506	+	if (startTime == 0L)
1507	+	startTime = System.nanoTime();
1508		else if (millisElapsedSince(startTime) > timeoutMillis) {
1509	<	threadAssertTrue(thread.isAlive());
1510	<	return;
1509	>	assertTrue(thread.isAlive());
1510	>	if (waitingForGodot == null
1511	>	|| thread.getState() == Thread.State.RUNNABLE)
1512	>	fail("timed out waiting for thread to enter wait state");
1513	>	else
1514	>	fail("timed out waiting for condition, thread state="
1515	>	+ thread.getState());
1516		}
1517		Thread.yield();
1518		}
1519		}
1520
1521		/**
1522	<	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1523	<	* state: BLOCKED, WAITING, or TIMED_WAITING.
1522	>	* Spin-waits up to the specified number of milliseconds for the given
1523	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1524	>	*/
1525	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1526	>	waitForThreadToEnterWaitState(thread, timeoutMillis, null);
1527	>	}
1528	>
1529	>	/**
1530	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1531	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1532		*/
1533		void waitForThreadToEnterWaitState(Thread thread) {
1534	<	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1534	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, null);
1535	>	}
1536	>
1537	>	/**
1538	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1539	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1540	>	* and additionally satisfy the given condition.
1541	>	*/
1542	>	void waitForThreadToEnterWaitState(Thread thread,
1543	>	Callable<Boolean> waitingForGodot) {
1544	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1545	>	}
1546	>
1547	>	/**
1548	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the current thread to
1549	>	* be interrupted.  Clears the interrupt status before returning.
1550	>	*/
1551	>	void awaitInterrupted() {
1552	>	for (long startTime = 0L; !Thread.interrupted(); ) {
1553	>	if (startTime == 0L)
1554	>	startTime = System.nanoTime();
1555	>	else if (millisElapsedSince(startTime) > LONG_DELAY_MS)
1556	>	fail("timed out waiting for thread interrupt");
1557	>	Thread.yield();
1558	>	}
1559		}
1560
1561		/**
#	Line 1082 | Line 1567 | public class JSR166TestCase extends Test
1567		return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1568		}
1569
1085	–	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1086	–	//         long startTime = System.nanoTime();
1087	–	//         try {
1088	–	//             r.run();
1089	–	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1090	–	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1091	–	//             throw new AssertionFailedError("did not return promptly");
1092	–	//     }
1093	–
1094	–	//     void assertTerminatesPromptly(Runnable r) {
1095	–	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1096	–	//     }
1097	–
1570		/**
1571		* Checks that timed f.get() returns the expected value, and does not
1572		* wait for the timeout to elapse before returning.
1573		*/
1574		<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1575		long startTime = System.nanoTime();
1576	+	T actual = null;
1577		try {
1578	<	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1578	>	actual = f.get(timeoutMillis, MILLISECONDS);
1579		} catch (Throwable fail) { threadUnexpectedException(fail); }
1580	+	assertEquals(expectedValue, actual);
1581		if (millisElapsedSince(startTime) > timeoutMillis/2)
1582	<	throw new AssertionFailedError("timed get did not return promptly");
1582	>	throw new AssertionError("timed get did not return promptly");
1583		}
1584
1585		<T> void checkTimedGet(Future<T> f, T expectedValue) {
#	Line 1123 | Line 1597 | public class JSR166TestCase extends Test
1597		}
1598
1599		/**
1600	+	* Returns a new started daemon Thread running the given action,
1601	+	* wrapped in a CheckedRunnable.
1602	+	*/
1603	+	Thread newStartedThread(Action action) {
1604	+	return newStartedThread(checkedRunnable(action));
1605	+	}
1606	+
1607	+	/**
1608		* Waits for the specified time (in milliseconds) for the thread
1609		* to terminate (using {@link Thread#join(long)}), else interrupts
1610		* the thread (in the hope that it may terminate later) and fails.
1611		*/
1612	<	void awaitTermination(Thread t, long timeoutMillis) {
1612	>	void awaitTermination(Thread thread, long timeoutMillis) {
1613		try {
1614	<	t.join(timeoutMillis);
1614	>	thread.join(timeoutMillis);
1615		} catch (InterruptedException fail) {
1616		threadUnexpectedException(fail);
1617	<	} finally {
1618	<	if (t.getState() != Thread.State.TERMINATED) {
1619	<	t.interrupt();
1620	<	fail("Test timed out");
1617	>	}
1618	>	if (thread.getState() != Thread.State.TERMINATED) {
1619	>	String detail = String.format(
1620	>	"timed out waiting for thread to terminate, thread=%s, state=%s" ,
1621	>	thread, thread.getState());
1622	>	try {
1623	>	threadFail(detail);
1624	>	} finally {
1625	>	// Interrupt thread __after__ having reported its stack trace
1626	>	thread.interrupt();
1627		}
1628		}
1629		}
#	Line 1163 | Line 1651 | public class JSR166TestCase extends Test
1651		}
1652		}
1653
1654	<	public abstract class RunnableShouldThrow implements Runnable {
1655	<	protected abstract void realRun() throws Throwable;
1656	<
1657	<	final Class<?> exceptionClass;
1658	<
1171	<	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1172	<	this.exceptionClass = exceptionClass;
1173	<	}
1174	<
1175	<	public final void run() {
1176	<	try {
1177	<	realRun();
1178	<	threadShouldThrow(exceptionClass.getSimpleName());
1179	<	} catch (Throwable t) {
1180	<	if (! exceptionClass.isInstance(t))
1181	<	threadUnexpectedException(t);
1182	<	}
1183	<	}
1654	>	Runnable checkedRunnable(Action action) {
1655	>	return new CheckedRunnable() {
1656	>	public void realRun() throws Throwable {
1657	>	action.run();
1658	>	}};
1659		}
1660
1661		public abstract class ThreadShouldThrow extends Thread {
#	Line 1195 | Line 1670 | public class JSR166TestCase extends Test
1670		public final void run() {
1671		try {
1672		realRun();
1198	–	threadShouldThrow(exceptionClass.getSimpleName());
1673		} catch (Throwable t) {
1674		if (! exceptionClass.isInstance(t))
1675		threadUnexpectedException(t);
1676	+	return;
1677		}
1678	+	threadShouldThrow(exceptionClass.getSimpleName());
1679		}
1680		}
1681
#	Line 1209 | Line 1685 | public class JSR166TestCase extends Test
1685		public final void run() {
1686		try {
1687		realRun();
1212	–	threadShouldThrow("InterruptedException");
1688		} catch (InterruptedException success) {
1689		threadAssertFalse(Thread.interrupted());
1690	+	return;
1691		} catch (Throwable fail) {
1692		threadUnexpectedException(fail);
1693		}
1694	+	threadShouldThrow("InterruptedException");
1695		}
1696		}
1697
#	Line 1226 | Line 1703 | public class JSR166TestCase extends Test
1703		return realCall();
1704		} catch (Throwable fail) {
1705		threadUnexpectedException(fail);
1229	–	return null;
1706		}
1707	<	}
1232	<	}
1233	<
1234	<	public abstract class CheckedInterruptedCallable<T>
1235	<	implements Callable<T> {
1236	<	protected abstract T realCall() throws Throwable;
1237	<
1238	<	public final T call() {
1239	<	try {
1240	<	T result = realCall();
1241	<	threadShouldThrow("InterruptedException");
1242	<	return result;
1243	<	} catch (InterruptedException success) {
1244	<	threadAssertFalse(Thread.interrupted());
1245	<	} catch (Throwable fail) {
1246	<	threadUnexpectedException(fail);
1247	<	}
1248	<	return null;
1707	>	throw new AssertionError("unreached");
1708		}
1709		}
1710
#	Line 1253 | Line 1712 | public class JSR166TestCase extends Test
1712		public void run() {}
1713		}
1714
1715	<	public static class NoOpCallable implements Callable {
1715	>	public static class NoOpCallable implements Callable<Object> {
1716		public Object call() { return Boolean.TRUE; }
1717		}
1718
#	Line 1283 | Line 1742 | public class JSR166TestCase extends Test
1742		}};
1743		}
1744
1745	<	public Runnable awaiter(final CountDownLatch latch) {
1746	<	return new CheckedRunnable() {
1747	<	public void realRun() throws InterruptedException {
1748	<	await(latch);
1749	<	}};
1745	>	class LatchAwaiter extends CheckedRunnable {
1746	>	static final int NEW = 0;
1747	>	static final int RUNNING = 1;
1748	>	static final int DONE = 2;
1749	>	final CountDownLatch latch;
1750	>	int state = NEW;
1751	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1752	>	public void realRun() throws InterruptedException {
1753	>	state = 1;
1754	>	await(latch);
1755	>	state = 2;
1756	>	}
1757		}
1758
1759	<	public void await(CountDownLatch latch) {
1759	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1760	>	return new LatchAwaiter(latch);
1761	>	}
1762	>
1763	>	public void await(CountDownLatch latch, long timeoutMillis) {
1764	>	boolean timedOut = false;
1765		try {
1766	<	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1766	>	timedOut = !latch.await(timeoutMillis, MILLISECONDS);
1767		} catch (Throwable fail) {
1768		threadUnexpectedException(fail);
1769		}
1770	+	if (timedOut)
1771	+	fail("timed out waiting for CountDownLatch for "
1772	+	+ (timeoutMillis/1000) + " sec");
1773	+	}
1774	+
1775	+	public void await(CountDownLatch latch) {
1776	+	await(latch, LONG_DELAY_MS);
1777		}
1778
1779		public void await(Semaphore semaphore) {
1780	+	boolean timedOut = false;
1781	+	try {
1782	+	timedOut = !semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS);
1783	+	} catch (Throwable fail) {
1784	+	threadUnexpectedException(fail);
1785	+	}
1786	+	if (timedOut)
1787	+	fail("timed out waiting for Semaphore for "
1788	+	+ (LONG_DELAY_MS/1000) + " sec");
1789	+	}
1790	+
1791	+	public void await(CyclicBarrier barrier) {
1792		try {
1793	<	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1793	>	barrier.await(LONG_DELAY_MS, MILLISECONDS);
1794		} catch (Throwable fail) {
1795		threadUnexpectedException(fail);
1796		}
#	Line 1320 | Line 1810 | public class JSR166TestCase extends Test
1810		//         long startTime = System.nanoTime();
1811		//         while (!flag.get()) {
1812		//             if (millisElapsedSince(startTime) > timeoutMillis)
1813	<	//                 throw new AssertionFailedError("timed out");
1813	>	//                 throw new AssertionError("timed out");
1814		//             Thread.yield();
1815		//         }
1816		//     }
#	Line 1329 | Line 1819 | public class JSR166TestCase extends Test
1819		public String call() { throw new NullPointerException(); }
1820		}
1821
1332	–	public static class CallableOne implements Callable<Integer> {
1333	–	public Integer call() { return one; }
1334	–	}
1335	–
1336	–	public class ShortRunnable extends CheckedRunnable {
1337	–	protected void realRun() throws Throwable {
1338	–	delay(SHORT_DELAY_MS);
1339	–	}
1340	–	}
1341	–
1342	–	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1343	–	protected void realRun() throws InterruptedException {
1344	–	delay(SHORT_DELAY_MS);
1345	–	}
1346	–	}
1347	–
1348	–	public class SmallRunnable extends CheckedRunnable {
1349	–	protected void realRun() throws Throwable {
1350	–	delay(SMALL_DELAY_MS);
1351	–	}
1352	–	}
1353	–
1354	–	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1355	–	protected void realRun() {
1356	–	try {
1357	–	delay(SMALL_DELAY_MS);
1358	–	} catch (InterruptedException ok) {}
1359	–	}
1360	–	}
1361	–
1362	–	public class SmallCallable extends CheckedCallable {
1363	–	protected Object realCall() throws InterruptedException {
1364	–	delay(SMALL_DELAY_MS);
1365	–	return Boolean.TRUE;
1366	–	}
1367	–	}
1368	–
1369	–	public class MediumRunnable extends CheckedRunnable {
1370	–	protected void realRun() throws Throwable {
1371	–	delay(MEDIUM_DELAY_MS);
1372	–	}
1373	–	}
1374	–
1375	–	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1376	–	protected void realRun() throws InterruptedException {
1377	–	delay(MEDIUM_DELAY_MS);
1378	–	}
1379	–	}
1380	–
1822		public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1823		return new CheckedRunnable() {
1824		protected void realRun() {
#	Line 1387 | Line 1828 | public class JSR166TestCase extends Test
1828		}};
1829		}
1830
1390	–	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1391	–	protected void realRun() {
1392	–	try {
1393	–	delay(MEDIUM_DELAY_MS);
1394	–	} catch (InterruptedException ok) {}
1395	–	}
1396	–	}
1397	–
1398	–	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1399	–	protected void realRun() {
1400	–	try {
1401	–	delay(LONG_DELAY_MS);
1402	–	} catch (InterruptedException ok) {}
1403	–	}
1404	–	}
1405	–
1831		/**
1832		* For use as ThreadFactory in constructors
1833		*/
#	Line 1416 | Line 1841 | public class JSR166TestCase extends Test
1841		boolean isDone();
1842		}
1843
1419	–	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1420	–	return new TrackedRunnable() {
1421	–	private volatile boolean done = false;
1422	–	public boolean isDone() { return done; }
1423	–	public void run() {
1424	–	try {
1425	–	delay(timeoutMillis);
1426	–	done = true;
1427	–	} catch (InterruptedException ok) {}
1428	–	}
1429	–	};
1430	–	}
1431	–
1432	–	public static class TrackedShortRunnable implements Runnable {
1433	–	public volatile boolean done = false;
1434	–	public void run() {
1435	–	try {
1436	–	delay(SHORT_DELAY_MS);
1437	–	done = true;
1438	–	} catch (InterruptedException ok) {}
1439	–	}
1440	–	}
1441	–
1442	–	public static class TrackedSmallRunnable implements Runnable {
1443	–	public volatile boolean done = false;
1444	–	public void run() {
1445	–	try {
1446	–	delay(SMALL_DELAY_MS);
1447	–	done = true;
1448	–	} catch (InterruptedException ok) {}
1449	–	}
1450	–	}
1451	–
1452	–	public static class TrackedMediumRunnable implements Runnable {
1453	–	public volatile boolean done = false;
1454	–	public void run() {
1455	–	try {
1456	–	delay(MEDIUM_DELAY_MS);
1457	–	done = true;
1458	–	} catch (InterruptedException ok) {}
1459	–	}
1460	–	}
1461	–
1462	–	public static class TrackedLongRunnable implements Runnable {
1463	–	public volatile boolean done = false;
1464	–	public void run() {
1465	–	try {
1466	–	delay(LONG_DELAY_MS);
1467	–	done = true;
1468	–	} catch (InterruptedException ok) {}
1469	–	}
1470	–	}
1471	–
1844		public static class TrackedNoOpRunnable implements Runnable {
1845		public volatile boolean done = false;
1846		public void run() {
#	Line 1476 | Line 1848 | public class JSR166TestCase extends Test
1848		}
1849		}
1850
1479	–	public static class TrackedCallable implements Callable {
1480	–	public volatile boolean done = false;
1481	–	public Object call() {
1482	–	try {
1483	–	delay(SMALL_DELAY_MS);
1484	–	done = true;
1485	–	} catch (InterruptedException ok) {}
1486	–	return Boolean.TRUE;
1487	–	}
1488	–	}
1489	–
1851		/**
1852		* Analog of CheckedRunnable for RecursiveAction
1853		*/
#	Line 1513 | Line 1874 | public class JSR166TestCase extends Test
1874		return realCompute();
1875		} catch (Throwable fail) {
1876		threadUnexpectedException(fail);
1516	–	return null;
1877		}
1878	+	throw new AssertionError("unreached");
1879		}
1880		}
1881
#	Line 1528 | Line 1889 | public class JSR166TestCase extends Test
1889
1890		/**
1891		* A CyclicBarrier that uses timed await and fails with
1892	<	* AssertionFailedErrors instead of throwing checked exceptions.
1892	>	* AssertionErrors instead of throwing checked exceptions.
1893		*/
1894	<	public class CheckedBarrier extends CyclicBarrier {
1894	>	public static class CheckedBarrier extends CyclicBarrier {
1895		public CheckedBarrier(int parties) { super(parties); }
1896
1897		public int await() {
1898		try {
1899	<	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1899	>	return super.await(LONGER_DELAY_MS, MILLISECONDS);
1900		} catch (TimeoutException timedOut) {
1901	<	throw new AssertionFailedError("timed out");
1901	>	throw new AssertionError("timed out");
1902		} catch (Exception fail) {
1903	<	AssertionFailedError afe =
1543	<	new AssertionFailedError("Unexpected exception: " + fail);
1544	<	afe.initCause(fail);
1545	<	throw afe;
1903	>	throw new AssertionError("Unexpected exception: " + fail, fail);
1904		}
1905		}
1906		}
1907
1908	<	void checkEmpty(BlockingQueue q) {
1908	>	void checkEmpty(BlockingQueue<?> q) {
1909		try {
1910		assertTrue(q.isEmpty());
1911		assertEquals(0, q.size());
1912		assertNull(q.peek());
1913		assertNull(q.poll());
1914	<	assertNull(q.poll(0, MILLISECONDS));
1914	>	assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit()));
1915		assertEquals(q.toString(), "[]");
1916		assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1917		assertFalse(q.iterator().hasNext());
#	Line 1595 | Line 1953 | public class JSR166TestCase extends Test
1953		}
1954
1955		@SuppressWarnings("unchecked")
1956	+	void assertImmutable(Object o) {
1957	+	if (o instanceof Collection) {
1958	+	assertThrows(
1959	+	UnsupportedOperationException.class,
1960	+	() -> ((Collection) o).add(null));
1961	+	}
1962	+	}
1963	+
1964	+	@SuppressWarnings("unchecked")
1965		<T> T serialClone(T o) {
1966	+	T clone = null;
1967		try {
1968		ObjectInputStream ois = new ObjectInputStream
1969		(new ByteArrayInputStream(serialBytes(o)));
1970	<	T clone = (T) ois.readObject();
1603	<	assertSame(o.getClass(), clone.getClass());
1604	<	return clone;
1970	>	clone = (T) ois.readObject();
1971		} catch (Throwable fail) {
1972		threadUnexpectedException(fail);
1973	+	}
1974	+	if (o == clone) assertImmutable(o);
1975	+	else assertSame(o.getClass(), clone.getClass());
1976	+	return clone;
1977	+	}
1978	+
1979	+	/**
1980	+	* A version of serialClone that leaves error handling (for
1981	+	* e.g. NotSerializableException) up to the caller.
1982	+	*/
1983	+	@SuppressWarnings("unchecked")
1984	+	<T> T serialClonePossiblyFailing(T o)
1985	+	throws ReflectiveOperationException, java.io.IOException {
1986	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1987	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1988	+	oos.writeObject(o);
1989	+	oos.flush();
1990	+	oos.close();
1991	+	ObjectInputStream ois = new ObjectInputStream
1992	+	(new ByteArrayInputStream(bos.toByteArray()));
1993	+	T clone = (T) ois.readObject();
1994	+	if (o == clone) assertImmutable(o);
1995	+	else assertSame(o.getClass(), clone.getClass());
1996	+	return clone;
1997	+	}
1998	+
1999	+	/**
2000	+	* If o implements Cloneable and has a public clone method,
2001	+	* returns a clone of o, else null.
2002	+	*/
2003	+	@SuppressWarnings("unchecked")
2004	+	<T> T cloneableClone(T o) {
2005	+	if (!(o instanceof Cloneable)) return null;
2006	+	final T clone;
2007	+	try {
2008	+	clone = (T) o.getClass().getMethod("clone").invoke(o);
2009	+	} catch (NoSuchMethodException ok) {
2010		return null;
2011	+	} catch (ReflectiveOperationException unexpected) {
2012	+	throw new Error(unexpected);
2013		}
2014	+	assertNotSame(o, clone); // not 100% guaranteed by spec
2015	+	assertSame(o.getClass(), clone.getClass());
2016	+	return clone;
2017		}
2018
2019		public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
2020	<	Runnable... throwingActions) {
2021	<	for (Runnable throwingAction : throwingActions) {
2020	>	Action... throwingActions) {
2021	>	for (Action throwingAction : throwingActions) {
2022		boolean threw = false;
2023		try { throwingAction.run(); }
2024		catch (Throwable t) {
2025		threw = true;
2026	<	if (!expectedExceptionClass.isInstance(t)) {
2027	<	AssertionFailedError afe =
2028	<	new AssertionFailedError
2029	<	("Expected " + expectedExceptionClass.getName() +
2030	<	", got " + t.getClass().getName());
1623	<	afe.initCause(t);
1624	<	threadUnexpectedException(afe);
1625	<	}
2026	>	if (!expectedExceptionClass.isInstance(t))
2027	>	throw new AssertionError(
2028	>	"Expected " + expectedExceptionClass.getName() +
2029	>	", got " + t.getClass().getName(),
2030	>	t);
2031		}
2032		if (!threw)
2033		shouldThrow(expectedExceptionClass.getName());
#	Line 1636 | Line 2041 | public class JSR166TestCase extends Test
2041		} catch (NoSuchElementException success) {}
2042		assertFalse(it.hasNext());
2043		}
2044	+
2045	+	public <T> Callable<T> callableThrowing(final Exception ex) {
2046	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
2047	+	}
2048	+
2049	+	public Runnable runnableThrowing(final RuntimeException ex) {
2050	+	return new Runnable() { public void run() { throw ex; }};
2051	+	}
2052	+
2053	+	/** A reusable thread pool to be shared by tests. */
2054	+	static final ExecutorService cachedThreadPool =
2055	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
2056	+	1000L, MILLISECONDS,
2057	+	new SynchronousQueue<Runnable>());
2058	+
2059	+	static <T> void shuffle(T[] array) {
2060	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
2061	+	}
2062	+
2063	+	/**
2064	+	* Returns the same String as would be returned by {@link
2065	+	* Object#toString}, whether or not the given object's class
2066	+	* overrides toString().
2067	+	*
2068	+	* @see System#identityHashCode
2069	+	*/
2070	+	static String identityString(Object x) {
2071	+	return x.getClass().getName()
2072	+	+ "@" + Integer.toHexString(System.identityHashCode(x));
2073	+	}
2074	+
2075	+	// --- Shared assertions for Executor tests ---
2076	+
2077	+	/**
2078	+	* Returns maximum number of tasks that can be submitted to given
2079	+	* pool (with bounded queue) before saturation (when submission
2080	+	* throws RejectedExecutionException).
2081	+	*/
2082	+	static final int saturatedSize(ThreadPoolExecutor pool) {
2083	+	BlockingQueue<Runnable> q = pool.getQueue();
2084	+	return pool.getMaximumPoolSize() + q.size() + q.remainingCapacity();
2085	+	}
2086	+
2087	+	@SuppressWarnings("FutureReturnValueIgnored")
2088	+	void assertNullTaskSubmissionThrowsNullPointerException(Executor e) {
2089	+	try {
2090	+	e.execute((Runnable) null);
2091	+	shouldThrow();
2092	+	} catch (NullPointerException success) {}
2093	+
2094	+	if (! (e instanceof ExecutorService)) return;
2095	+	ExecutorService es = (ExecutorService) e;
2096	+	try {
2097	+	es.submit((Runnable) null);
2098	+	shouldThrow();
2099	+	} catch (NullPointerException success) {}
2100	+	try {
2101	+	es.submit((Runnable) null, Boolean.TRUE);
2102	+	shouldThrow();
2103	+	} catch (NullPointerException success) {}
2104	+	try {
2105	+	es.submit((Callable<?>) null);
2106	+	shouldThrow();
2107	+	} catch (NullPointerException success) {}
2108	+
2109	+	if (! (e instanceof ScheduledExecutorService)) return;
2110	+	ScheduledExecutorService ses = (ScheduledExecutorService) e;
2111	+	try {
2112	+	ses.schedule((Runnable) null,
2113	+	randomTimeout(), randomTimeUnit());
2114	+	shouldThrow();
2115	+	} catch (NullPointerException success) {}
2116	+	try {
2117	+	ses.schedule((Callable<?>) null,
2118	+	randomTimeout(), randomTimeUnit());
2119	+	shouldThrow();
2120	+	} catch (NullPointerException success) {}
2121	+	try {
2122	+	ses.scheduleAtFixedRate((Runnable) null,
2123	+	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2124	+	shouldThrow();
2125	+	} catch (NullPointerException success) {}
2126	+	try {
2127	+	ses.scheduleWithFixedDelay((Runnable) null,
2128	+	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2129	+	shouldThrow();
2130	+	} catch (NullPointerException success) {}
2131	+	}
2132	+
2133	+	void setRejectedExecutionHandler(
2134	+	ThreadPoolExecutor p, RejectedExecutionHandler handler) {
2135	+	p.setRejectedExecutionHandler(handler);
2136	+	assertSame(handler, p.getRejectedExecutionHandler());
2137	+	}
2138	+
2139	+	void assertTaskSubmissionsAreRejected(ThreadPoolExecutor p) {
2140	+	final RejectedExecutionHandler savedHandler = p.getRejectedExecutionHandler();
2141	+	final long savedTaskCount = p.getTaskCount();
2142	+	final long savedCompletedTaskCount = p.getCompletedTaskCount();
2143	+	final int savedQueueSize = p.getQueue().size();
2144	+	final boolean stock = (p.getClass().getClassLoader() == null);
2145	+
2146	+	Runnable r = () -> {};
2147	+	Callable<Boolean> c = () -> Boolean.TRUE;
2148	+
2149	+	class Recorder implements RejectedExecutionHandler {
2150	+	public volatile Runnable r = null;
2151	+	public volatile ThreadPoolExecutor p = null;
2152	+	public void reset() { r = null; p = null; }
2153	+	public void rejectedExecution(Runnable r, ThreadPoolExecutor p) {
2154	+	assertNull(this.r);
2155	+	assertNull(this.p);
2156	+	this.r = r;
2157	+	this.p = p;
2158	+	}
2159	+	}
2160	+
2161	+	// check custom handler is invoked exactly once per task
2162	+	Recorder recorder = new Recorder();
2163	+	setRejectedExecutionHandler(p, recorder);
2164	+	for (int i = 2; i--> 0; ) {
2165	+	recorder.reset();
2166	+	p.execute(r);
2167	+	if (stock && p.getClass() == ThreadPoolExecutor.class)
2168	+	assertSame(r, recorder.r);
2169	+	assertSame(p, recorder.p);
2170	+
2171	+	recorder.reset();
2172	+	assertFalse(p.submit(r).isDone());
2173	+	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2174	+	assertSame(p, recorder.p);
2175	+
2176	+	recorder.reset();
2177	+	assertFalse(p.submit(r, Boolean.TRUE).isDone());
2178	+	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2179	+	assertSame(p, recorder.p);
2180	+
2181	+	recorder.reset();
2182	+	assertFalse(p.submit(c).isDone());
2183	+	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2184	+	assertSame(p, recorder.p);
2185	+
2186	+	if (p instanceof ScheduledExecutorService) {
2187	+	ScheduledExecutorService s = (ScheduledExecutorService) p;
2188	+	ScheduledFuture<?> future;
2189	+
2190	+	recorder.reset();
2191	+	future = s.schedule(r, randomTimeout(), randomTimeUnit());
2192	+	assertFalse(future.isDone());
2193	+	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2194	+	assertSame(p, recorder.p);
2195	+
2196	+	recorder.reset();
2197	+	future = s.schedule(c, randomTimeout(), randomTimeUnit());
2198	+	assertFalse(future.isDone());
2199	+	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2200	+	assertSame(p, recorder.p);
2201	+
2202	+	recorder.reset();
2203	+	future = s.scheduleAtFixedRate(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2204	+	assertFalse(future.isDone());
2205	+	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2206	+	assertSame(p, recorder.p);
2207	+
2208	+	recorder.reset();
2209	+	future = s.scheduleWithFixedDelay(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2210	+	assertFalse(future.isDone());
2211	+	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2212	+	assertSame(p, recorder.p);
2213	+	}
2214	+	}
2215	+
2216	+	// Checking our custom handler above should be sufficient, but
2217	+	// we add some integration tests of standard handlers.
2218	+	final AtomicReference<Thread> thread = new AtomicReference<>();
2219	+	final Runnable setThread = () -> thread.set(Thread.currentThread());
2220	+
2221	+	setRejectedExecutionHandler(p, new ThreadPoolExecutor.AbortPolicy());
2222	+	try {
2223	+	p.execute(setThread);
2224	+	shouldThrow();
2225	+	} catch (RejectedExecutionException success) {}
2226	+	assertNull(thread.get());
2227	+
2228	+	setRejectedExecutionHandler(p, new ThreadPoolExecutor.DiscardPolicy());
2229	+	p.execute(setThread);
2230	+	assertNull(thread.get());
2231	+
2232	+	setRejectedExecutionHandler(p, new ThreadPoolExecutor.CallerRunsPolicy());
2233	+	p.execute(setThread);
2234	+	if (p.isShutdown())
2235	+	assertNull(thread.get());
2236	+	else
2237	+	assertSame(Thread.currentThread(), thread.get());
2238	+
2239	+	setRejectedExecutionHandler(p, savedHandler);
2240	+
2241	+	// check that pool was not perturbed by handlers
2242	+	assertEquals(savedTaskCount, p.getTaskCount());
2243	+	assertEquals(savedCompletedTaskCount, p.getCompletedTaskCount());
2244	+	assertEquals(savedQueueSize, p.getQueue().size());
2245	+	}
2246	+
2247	+	void assertCollectionsEquals(Collection<?> x, Collection<?> y) {
2248	+	assertEquals(x, y);
2249	+	assertEquals(y, x);
2250	+	assertEquals(x.isEmpty(), y.isEmpty());
2251	+	assertEquals(x.size(), y.size());
2252	+	if (x instanceof List) {
2253	+	assertEquals(x.toString(), y.toString());
2254	+	}
2255	+	if (x instanceof List || x instanceof Set) {
2256	+	assertEquals(x.hashCode(), y.hashCode());
2257	+	}
2258	+	if (x instanceof List || x instanceof Deque) {
2259	+	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2260	+	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2261	+	y.toArray(new Object[0])));
2262	+	}
2263	+	}
2264	+
2265	+	/**
2266	+	* A weaker form of assertCollectionsEquals which does not insist
2267	+	* that the two collections satisfy Object#equals(Object), since
2268	+	* they may use identity semantics as Deques do.
2269	+	*/
2270	+	void assertCollectionsEquivalent(Collection<?> x, Collection<?> y) {
2271	+	if (x instanceof List || x instanceof Set)
2272	+	assertCollectionsEquals(x, y);
2273	+	else {
2274	+	assertEquals(x.isEmpty(), y.isEmpty());
2275	+	assertEquals(x.size(), y.size());
2276	+	assertEquals(new HashSet<Object>(x), new HashSet<Object>(y));
2277	+	if (x instanceof Deque) {
2278	+	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2279	+	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2280	+	y.toArray(new Object[0])));
2281	+	}
2282	+	}
2283	+	}
2284		}

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