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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.111 by dl, Sun Jul 21 22:24:18 2013 UTC vs.
Revision 1.211 by jsr166, Mon Nov 14 23:52:22 2016 UTC

#	Line 6 | Line 6
6		* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
9	>	/*
10	>	* @test
11	>	* @summary JSR-166 tck tests
12	>	* @modules java.management
13	>	* @build *
14	>	* @run junit/othervm/timeout=1000 -Djsr166.testImplementationDetails=true JSR166TestCase
15	>	* @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=0 -Djsr166.testImplementationDetails=true JSR166TestCase
16	>	* @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=1 -Djava.util.secureRandomSeed=true JSR166TestCase
17	>	*/
18	>
19	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
20	>	import static java.util.concurrent.TimeUnit.MINUTES;
21	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
22	>
23		import java.io.ByteArrayInputStream;
24		import java.io.ByteArrayOutputStream;
25		import java.io.ObjectInputStream;
26		import java.io.ObjectOutputStream;
27		import java.lang.management.ManagementFactory;
28		import java.lang.management.ThreadInfo;
29	+	import java.lang.management.ThreadMXBean;
30	+	import java.lang.reflect.Constructor;
31		import java.lang.reflect.Method;
32	+	import java.lang.reflect.Modifier;
33	+	import java.nio.file.Files;
34	+	import java.nio.file.Paths;
35	+	import java.security.CodeSource;
36	+	import java.security.Permission;
37	+	import java.security.PermissionCollection;
38	+	import java.security.Permissions;
39	+	import java.security.Policy;
40	+	import java.security.ProtectionDomain;
41	+	import java.security.SecurityPermission;
42		import java.util.ArrayList;
43		import java.util.Arrays;
44	+	import java.util.Collection;
45	+	import java.util.Collections;
46		import java.util.Date;
47		import java.util.Enumeration;
48	+	import java.util.Iterator;
49		import java.util.List;
50		import java.util.NoSuchElementException;
51		import java.util.PropertyPermission;
52	<	import java.util.concurrent.*;
52	>	import java.util.concurrent.BlockingQueue;
53	>	import java.util.concurrent.Callable;
54	>	import java.util.concurrent.CountDownLatch;
55	>	import java.util.concurrent.CyclicBarrier;
56	>	import java.util.concurrent.ExecutionException;
57	>	import java.util.concurrent.Executors;
58	>	import java.util.concurrent.ExecutorService;
59	>	import java.util.concurrent.ForkJoinPool;
60	>	import java.util.concurrent.Future;
61	>	import java.util.concurrent.RecursiveAction;
62	>	import java.util.concurrent.RecursiveTask;
63	>	import java.util.concurrent.RejectedExecutionHandler;
64	>	import java.util.concurrent.Semaphore;
65	>	import java.util.concurrent.SynchronousQueue;
66	>	import java.util.concurrent.ThreadFactory;
67	>	import java.util.concurrent.ThreadLocalRandom;
68	>	import java.util.concurrent.ThreadPoolExecutor;
69	>	import java.util.concurrent.TimeoutException;
70		import java.util.concurrent.atomic.AtomicBoolean;
71		import java.util.concurrent.atomic.AtomicReference;
72	<	import static java.util.concurrent.TimeUnit.MILLISECONDS;
73	<	import static java.util.concurrent.TimeUnit.NANOSECONDS;
74	<	import java.security.CodeSource;
75	<	import java.security.Permission;
76	<	import java.security.PermissionCollection;
77	<	import java.security.Permissions;
78	<	import java.security.Policy;
79	<	import java.security.ProtectionDomain;
35	<	import java.security.SecurityPermission;
72	>	import java.util.regex.Matcher;
73	>	import java.util.regex.Pattern;
74	>
75	>	import junit.framework.AssertionFailedError;
76	>	import junit.framework.Test;
77	>	import junit.framework.TestCase;
78	>	import junit.framework.TestResult;
79	>	import junit.framework.TestSuite;
80
81		/**
82		* Base class for JSR166 Junit TCK tests.  Defines some constants,
#	Line 44 | Line 88 | import java.security.SecurityPermission;
88		*
89		* <ol>
90		*
91	<	* <li> All assertions in code running in generated threads must use
91	>	* <li>All assertions in code running in generated threads must use
92		* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
93		* #threadAssertEquals}, or {@link #threadAssertNull}, (not
94		* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
95		* particularly recommended) for other code to use these forms too.
96		* Only the most typically used JUnit assertion methods are defined
97	<	* this way, but enough to live with.</li>
97	>	* this way, but enough to live with.
98		*
99	<	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
99	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
100		* to invoke {@code super.setUp} and {@code super.tearDown} within
101		* them. These methods are used to clear and check for thread
102	<	* assertion failures.</li>
102	>	* assertion failures.
103		*
104		* <li>All delays and timeouts must use one of the constants {@code
105		* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
#	Line 66 | Line 110 | import java.security.SecurityPermission;
110		* is always discriminable as larger than SHORT and smaller than
111		* MEDIUM.  And so on. These constants are set to conservative values,
112		* but even so, if there is ever any doubt, they can all be increased
113	<	* in one spot to rerun tests on slower platforms.</li>
113	>	* in one spot to rerun tests on slower platforms.
114		*
115	<	* <li> All threads generated must be joined inside each test case
115	>	* <li>All threads generated must be joined inside each test case
116		* method (or {@code fail} to do so) before returning from the
117		* method. The {@code joinPool} method can be used to do this when
118	<	* using Executors.</li>
118	>	* using Executors.
119		*
120		* </ol>
121		*
122		* <p><b>Other notes</b>
123		* <ul>
124		*
125	<	* <li> Usually, there is one testcase method per JSR166 method
125	>	* <li>Usually, there is one testcase method per JSR166 method
126		* covering "normal" operation, and then as many exception-testing
127		* methods as there are exceptions the method can throw. Sometimes
128		* there are multiple tests per JSR166 method when the different
129		* "normal" behaviors differ significantly. And sometimes testcases
130	<	* cover multiple methods when they cannot be tested in
87	<	* isolation.</li>
130	>	* cover multiple methods when they cannot be tested in isolation.
131		*
132	<	* <li> The documentation style for testcases is to provide as javadoc
132	>	* <li>The documentation style for testcases is to provide as javadoc
133		* a simple sentence or two describing the property that the testcase
134		* method purports to test. The javadocs do not say anything about how
135	<	* the property is tested. To find out, read the code.</li>
135	>	* the property is tested. To find out, read the code.
136		*
137	<	* <li> These tests are "conformance tests", and do not attempt to
137	>	* <li>These tests are "conformance tests", and do not attempt to
138		* test throughput, latency, scalability or other performance factors
139		* (see the separate "jtreg" tests for a set intended to check these
140		* for the most central aspects of functionality.) So, most tests use
141		* the smallest sensible numbers of threads, collection sizes, etc
142	<	* needed to check basic conformance.</li>
142	>	* needed to check basic conformance.
143		*
144		* <li>The test classes currently do not declare inclusion in
145		* any particular package to simplify things for people integrating
146	<	* them in TCK test suites.</li>
146	>	* them in TCK test suites.
147		*
148	<	* <li> As a convenience, the {@code main} of this class (JSR166TestCase)
149	<	* runs all JSR166 unit tests.</li>
148	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
149	>	* runs all JSR166 unit tests.
150		*
151		* </ul>
152		*/
#	Line 115 | Line 158 | public class JSR166TestCase extends Test
158		Boolean.getBoolean("jsr166.expensiveTests");
159
160		/**
161	+	* If true, also run tests that are not part of the official tck
162	+	* because they test unspecified implementation details.
163	+	*/
164	+	protected static final boolean testImplementationDetails =
165	+	Boolean.getBoolean("jsr166.testImplementationDetails");
166	+
167	+	/**
168		* If true, report on stdout all "slow" tests, that is, ones that
169		* take more than profileThreshold milliseconds to execute.
170		*/
#	Line 134 | Line 184 | public class JSR166TestCase extends Test
184		private static final int runsPerTest =
185		Integer.getInteger("jsr166.runsPerTest", 1);
186
187	+	/**
188	+	* The number of repetitions of the test suite (for finding leaks?).
189	+	*/
190	+	private static final int suiteRuns =
191	+	Integer.getInteger("jsr166.suiteRuns", 1);
192	+
193	+	/**
194	+	* Returns the value of the system property, or NaN if not defined.
195	+	*/
196	+	private static float systemPropertyValue(String name) {
197	+	String floatString = System.getProperty(name);
198	+	if (floatString == null)
199	+	return Float.NaN;
200	+	try {
201	+	return Float.parseFloat(floatString);
202	+	} catch (NumberFormatException ex) {
203	+	throw new IllegalArgumentException(
204	+	String.format("Bad float value in system property %s=%s",
205	+	name, floatString));
206	+	}
207	+	}
208	+
209	+	/**
210	+	* The scaling factor to apply to standard delays used in tests.
211	+	* May be initialized from any of:
212	+	* - the "jsr166.delay.factor" system property
213	+	* - the "test.timeout.factor" system property (as used by jtreg)
214	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
215	+	* - hard-coded fuzz factor when using a known slowpoke VM
216	+	*/
217	+	private static final float delayFactor = delayFactor();
218	+
219	+	private static float delayFactor() {
220	+	float x;
221	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
222	+	return x;
223	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
224	+	return x;
225	+	String prop = System.getProperty("java.vm.version");
226	+	if (prop != null && prop.matches(".*debug.*"))
227	+	return 4.0f; // How much slower is fastdebug than product?!
228	+	return 1.0f;
229	+	}
230	+
231	+	public JSR166TestCase() { super(); }
232	+	public JSR166TestCase(String name) { super(name); }
233	+
234	+	/**
235	+	* A filter for tests to run, matching strings of the form
236	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
237	+	* Usefully combined with jsr166.runsPerTest.
238	+	*/
239	+	private static final Pattern methodFilter = methodFilter();
240	+
241	+	private static Pattern methodFilter() {
242	+	String regex = System.getProperty("jsr166.methodFilter");
243	+	return (regex == null) ? null : Pattern.compile(regex);
244	+	}
245	+
246	+	// Instrumentation to debug very rare, but very annoying hung test runs.
247	+	static volatile TestCase currentTestCase;
248	+	// static volatile int currentRun = 0;
249	+	static {
250	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
251	+	// Avoid spurious reports with enormous runsPerTest.
252	+	// A single test case run should never take more than 1 second.
253	+	// But let's cap it at the high end too ...
254	+	final int timeoutMinutes =
255	+	Math.min(15, Math.max(runsPerTest / 60, 1));
256	+	for (TestCase lastTestCase = currentTestCase;;) {
257	+	try { MINUTES.sleep(timeoutMinutes); }
258	+	catch (InterruptedException unexpected) { break; }
259	+	if (lastTestCase == currentTestCase) {
260	+	System.err.printf(
261	+	"Looks like we're stuck running test: %s%n",
262	+	lastTestCase);
263	+	//                     System.err.printf(
264	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
265	+	//                         lastTestCase, currentRun, runsPerTest);
266	+	//                     System.err.println("availableProcessors=" +
267	+	//                         Runtime.getRuntime().availableProcessors());
268	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
269	+	dumpTestThreads();
270	+	// one stack dump is probably enough; more would be spam
271	+	break;
272	+	}
273	+	lastTestCase = currentTestCase;
274	+	}}};
275	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
276	+	thread.setDaemon(true);
277	+	thread.start();
278	+	}
279	+
280	+	//     public static String cpuModel() {
281	+	//         try {
282	+	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
283	+	//                 .matcher(new String(
284	+	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
285	+	//             matcher.find();
286	+	//             return matcher.group(1);
287	+	//         } catch (Exception ex) { return null; }
288	+	//     }
289	+
290	+	public void runBare() throws Throwable {
291	+	currentTestCase = this;
292	+	if (methodFilter == null
293	+	|| methodFilter.matcher(toString()).find())
294	+	super.runBare();
295	+	}
296	+
297		protected void runTest() throws Throwable {
298		for (int i = 0; i < runsPerTest; i++) {
299	+	// currentRun = i;
300		if (profileTests)
301		runTestProfiled();
302		else
#	Line 144 | Line 305 | public class JSR166TestCase extends Test
305		}
306
307		protected void runTestProfiled() throws Throwable {
308	<	long t0 = System.nanoTime();
309	<	try {
308	>	for (int i = 0; i < 2; i++) {
309	>	long startTime = System.nanoTime();
310		super.runTest();
311	<	} finally {
312	<	long elapsedMillis =
313	<	(System.nanoTime() - t0) / (1000L * 1000L);
314	<	if (elapsedMillis >= profileThreshold)
311	>	long elapsedMillis = millisElapsedSince(startTime);
312	>	if (elapsedMillis < profileThreshold)
313	>	break;
314	>	// Never report first run of any test; treat it as a
315	>	// warmup run, notably to trigger all needed classloading,
316	>	if (i > 0)
317		System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
318		}
319		}
320
321		/**
322		* Runs all JSR166 unit tests using junit.textui.TestRunner.
160	–	* Optional command line arg provides the number of iterations to
161	–	* repeat running the tests.
323		*/
324		public static void main(String[] args) {
325	+	main(suite(), args);
326	+	}
327	+
328	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
329	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
330	+	long runTime;
331	+	public void startTest(Test test) {}
332	+	protected void printHeader(long runTime) {
333	+	this.runTime = runTime; // defer printing for later
334	+	}
335	+	protected void printFooter(TestResult result) {
336	+	if (result.wasSuccessful()) {
337	+	getWriter().println("OK (" + result.runCount() + " tests)"
338	+	+ "  Time: " + elapsedTimeAsString(runTime));
339	+	} else {
340	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
341	+	super.printFooter(result);
342	+	}
343	+	}
344	+	}
345	+
346	+	/**
347	+	* Returns a TestRunner that doesn't bother with unnecessary
348	+	* fluff, like printing a "." for each test case.
349	+	*/
350	+	static junit.textui.TestRunner newPithyTestRunner() {
351	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
352	+	runner.setPrinter(new PithyResultPrinter(System.out));
353	+	return runner;
354	+	}
355	+
356	+	/**
357	+	* Runs all unit tests in the given test suite.
358	+	* Actual behavior influenced by jsr166.* system properties.
359	+	*/
360	+	static void main(Test suite, String[] args) {
361		if (useSecurityManager) {
362		System.err.println("Setting a permissive security manager");
363		Policy.setPolicy(permissivePolicy());
364		System.setSecurityManager(new SecurityManager());
365		}
366	<	int iters = (args.length == 0) ? 1 : Integer.parseInt(args[0]);
367	<
368	<	Test s = suite();
369	<	for (int i = 0; i < iters; ++i) {
173	<	junit.textui.TestRunner.run(s);
366	>	for (int i = 0; i < suiteRuns; i++) {
367	>	TestResult result = newPithyTestRunner().doRun(suite);
368	>	if (!result.wasSuccessful())
369	>	System.exit(1);
370		System.gc();
371		System.runFinalization();
372		}
177	–	System.exit(0);
373		}
374
375		public static TestSuite newTestSuite(Object... suiteOrClasses) {
#	Line 205 | Line 400 | public class JSR166TestCase extends Test
400		}
401
402		public static final double JAVA_CLASS_VERSION;
403	+	public static final String JAVA_SPECIFICATION_VERSION;
404		static {
405		try {
406		JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
407		new java.security.PrivilegedAction<Double>() {
408		public Double run() {
409		return Double.valueOf(System.getProperty("java.class.version"));}});
410	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
411	+	new java.security.PrivilegedAction<String>() {
412	+	public String run() {
413	+	return System.getProperty("java.specification.version");}});
414		} catch (Throwable t) {
415		throw new Error(t);
416		}
#	Line 219 | Line 419 | public class JSR166TestCase extends Test
419		public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
420		public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
421		public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
422	+	public static boolean atLeastJava9() {
423	+	return JAVA_CLASS_VERSION >= 53.0
424	+	// As of 2015-09, java9 still uses 52.0 class file version
425	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
426	+	}
427	+	public static boolean atLeastJava10() {
428	+	return JAVA_CLASS_VERSION >= 54.0
429	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
430	+	}
431
432		/**
433		* Collects all JSR166 unit tests as one suite.
#	Line 239 | Line 448 | public class JSR166TestCase extends Test
448		AbstractQueuedLongSynchronizerTest.suite(),
449		ArrayBlockingQueueTest.suite(),
450		ArrayDequeTest.suite(),
451	+	ArrayListTest.suite(),
452		AtomicBooleanTest.suite(),
453		AtomicIntegerArrayTest.suite(),
454		AtomicIntegerFieldUpdaterTest.suite(),
#	Line 261 | Line 471 | public class JSR166TestCase extends Test
471		CopyOnWriteArrayListTest.suite(),
472		CopyOnWriteArraySetTest.suite(),
473		CountDownLatchTest.suite(),
474	+	CountedCompleterTest.suite(),
475		CyclicBarrierTest.suite(),
476		DelayQueueTest.suite(),
477		EntryTest.suite(),
#	Line 289 | Line 500 | public class JSR166TestCase extends Test
500		TreeMapTest.suite(),
501		TreeSetTest.suite(),
502		TreeSubMapTest.suite(),
503	<	TreeSubSetTest.suite());
503	>	TreeSubSetTest.suite(),
504	>	VectorTest.suite());
505
506		// Java8+ test classes
507		if (atLeastJava8()) {
508		String[] java8TestClassNames = {
509	+	"ArrayDeque8Test",
510	+	"Atomic8Test",
511		"CompletableFutureTest",
512		"ConcurrentHashMap8Test",
513	<	"CountedCompleterTest",
513	>	"CountedCompleter8Test",
514		"DoubleAccumulatorTest",
515		"DoubleAdderTest",
516		"ForkJoinPool8Test",
#	Line 305 | Line 519 | public class JSR166TestCase extends Test
519		"LongAdderTest",
520		"SplittableRandomTest",
521		"StampedLockTest",
522	+	"SubmissionPublisherTest",
523	+	"ThreadLocalRandom8Test",
524	+	"TimeUnit8Test",
525		};
526		addNamedTestClasses(suite, java8TestClassNames);
527		}
528
529	+	// Java9+ test classes
530	+	if (atLeastJava9()) {
531	+	String[] java9TestClassNames = {
532	+	"AtomicBoolean9Test",
533	+	"AtomicInteger9Test",
534	+	"AtomicIntegerArray9Test",
535	+	"AtomicLong9Test",
536	+	"AtomicLongArray9Test",
537	+	"AtomicReference9Test",
538	+	"AtomicReferenceArray9Test",
539	+	"ExecutorCompletionService9Test",
540	+	};
541	+	addNamedTestClasses(suite, java9TestClassNames);
542	+	}
543	+
544		return suite;
545		}
546
547	+	/** Returns list of junit-style test method names in given class. */
548	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
549	+	Method[] methods = testClass.getDeclaredMethods();
550	+	ArrayList<String> names = new ArrayList<String>(methods.length);
551	+	for (Method method : methods) {
552	+	if (method.getName().startsWith("test")
553	+	&& Modifier.isPublic(method.getModifiers())
554	+	// method.getParameterCount() requires jdk8+
555	+	&& method.getParameterTypes().length == 0) {
556	+	names.add(method.getName());
557	+	}
558	+	}
559	+	return names;
560	+	}
561	+
562	+	/**
563	+	* Returns junit-style testSuite for the given test class, but
564	+	* parameterized by passing extra data to each test.
565	+	*/
566	+	public static <ExtraData> Test parameterizedTestSuite
567	+	(Class<? extends JSR166TestCase> testClass,
568	+	Class<ExtraData> dataClass,
569	+	ExtraData data) {
570	+	try {
571	+	TestSuite suite = new TestSuite();
572	+	Constructor c =
573	+	testClass.getDeclaredConstructor(dataClass, String.class);
574	+	for (String methodName : testMethodNames(testClass))
575	+	suite.addTest((Test) c.newInstance(data, methodName));
576	+	return suite;
577	+	} catch (Exception e) {
578	+	throw new Error(e);
579	+	}
580	+	}
581	+
582	+	/**
583	+	* Returns junit-style testSuite for the jdk8 extension of the
584	+	* given test class, but parameterized by passing extra data to
585	+	* each test.  Uses reflection to allow compilation in jdk7.
586	+	*/
587	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
588	+	(Class<? extends JSR166TestCase> testClass,
589	+	Class<ExtraData> dataClass,
590	+	ExtraData data) {
591	+	if (atLeastJava8()) {
592	+	String name = testClass.getName();
593	+	String name8 = name.replaceAll("Test$", "8Test");
594	+	if (name.equals(name8)) throw new Error(name);
595	+	try {
596	+	return (Test)
597	+	Class.forName(name8)
598	+	.getMethod("testSuite", new Class[] { dataClass })
599	+	.invoke(null, data);
600	+	} catch (Exception e) {
601	+	throw new Error(e);
602	+	}
603	+	} else {
604	+	return new TestSuite();
605	+	}
606	+	}
607	+
608		// Delays for timing-dependent tests, in milliseconds.
609
610		public static long SHORT_DELAY_MS;
#	Line 320 | Line 613 | public class JSR166TestCase extends Test
613		public static long LONG_DELAY_MS;
614
615		/**
616	<	* Returns the shortest timed delay. This could
617	<	* be reimplemented to use for example a Property.
616	>	* Returns the shortest timed delay. This can be scaled up for
617	>	* slow machines using the jsr166.delay.factor system property,
618	>	* or via jtreg's -timeoutFactor: flag.
619	>	* http://openjdk.java.net/jtreg/command-help.html
620		*/
621		protected long getShortDelay() {
622	<	return 50;
622	>	return (long) (50 * delayFactor);
623		}
624
625		/**
#	Line 346 | Line 641 | public class JSR166TestCase extends Test
641		}
642
643		/**
644	<	* Returns a new Date instance representing a time delayMillis
645	<	* milliseconds in the future.
644	>	* Returns a new Date instance representing a time at least
645	>	* delayMillis milliseconds in the future.
646		*/
647		Date delayedDate(long delayMillis) {
648	<	return new Date(System.currentTimeMillis() + delayMillis);
648	>	// Add 1 because currentTimeMillis is known to round into the past.
649	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
650		}
651
652		/**
#	Line 366 | Line 662 | public class JSR166TestCase extends Test
662		* the same test have no effect.
663		*/
664		public void threadRecordFailure(Throwable t) {
665	+	System.err.println(t);
666	+	dumpTestThreads();
667		threadFailure.compareAndSet(null, t);
668		}
669
#	Line 373 | Line 671 | public class JSR166TestCase extends Test
671		setDelays();
672		}
673
674	+	void tearDownFail(String format, Object... args) {
675	+	String msg = toString() + ": " + String.format(format, args);
676	+	System.err.println(msg);
677	+	dumpTestThreads();
678	+	throw new AssertionFailedError(msg);
679	+	}
680	+
681		/**
682		* Extra checks that get done for all test cases.
683		*
#	Line 400 | Line 705 | public class JSR166TestCase extends Test
705		}
706
707		if (Thread.interrupted())
708	<	throw new AssertionFailedError("interrupt status set in main thread");
708	>	tearDownFail("interrupt status set in main thread");
709
710		checkForkJoinPoolThreadLeaks();
711		}
712
713		/**
714	<	* Find missing try { ... } finally { joinPool(e); }
714	>	* Finds missing PoolCleaners
715		*/
716		void checkForkJoinPoolThreadLeaks() throws InterruptedException {
717	<	Thread[] survivors = new Thread[5];
717	>	Thread[] survivors = new Thread[7];
718		int count = Thread.enumerate(survivors);
719		for (int i = 0; i < count; i++) {
720		Thread thread = survivors[i];
#	Line 417 | Line 722 | public class JSR166TestCase extends Test
722		if (name.startsWith("ForkJoinPool-")) {
723		// give thread some time to terminate
724		thread.join(LONG_DELAY_MS);
725	<	if (!thread.isAlive()) continue;
726	<	thread.stop();
727	<	throw new AssertionFailedError
423	<	(String.format("Found leaked ForkJoinPool thread test=%s thread=%s%n",
424	<	toString(), name));
725	>	if (thread.isAlive())
726	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
727	>	thread);
728		}
729		}
730	+
731	+	if (!ForkJoinPool.commonPool()
732	+	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
733	+	tearDownFail("ForkJoin common pool thread stuck");
734		}
735
736		/**
#	Line 436 | Line 743 | public class JSR166TestCase extends Test
743		fail(reason);
744		} catch (AssertionFailedError t) {
745		threadRecordFailure(t);
746	<	fail(reason);
746	>	throw t;
747		}
748		}
749
#	Line 504 | Line 811 | public class JSR166TestCase extends Test
811		public void threadAssertEquals(Object x, Object y) {
812		try {
813		assertEquals(x, y);
814	<	} catch (AssertionFailedError t) {
815	<	threadRecordFailure(t);
816	<	throw t;
817	<	} catch (Throwable t) {
818	<	threadUnexpectedException(t);
814	>	} catch (AssertionFailedError fail) {
815	>	threadRecordFailure(fail);
816	>	throw fail;
817	>	} catch (Throwable fail) {
818	>	threadUnexpectedException(fail);
819		}
820		}
821
#	Line 520 | Line 827 | public class JSR166TestCase extends Test
827		public void threadAssertSame(Object x, Object y) {
828		try {
829		assertSame(x, y);
830	<	} catch (AssertionFailedError t) {
831	<	threadRecordFailure(t);
832	<	throw t;
830	>	} catch (AssertionFailedError fail) {
831	>	threadRecordFailure(fail);
832	>	throw fail;
833		}
834		}
835
#	Line 563 | Line 870 | public class JSR166TestCase extends Test
870		/**
871		* Delays, via Thread.sleep, for the given millisecond delay, but
872		* if the sleep is shorter than specified, may re-sleep or yield
873	<	* until time elapses.
873	>	* until time elapses.  Ensures that the given time, as measured
874	>	* by System.nanoTime(), has elapsed.
875		*/
876		static void delay(long millis) throws InterruptedException {
877	<	long startTime = System.nanoTime();
878	<	long ns = millis * 1000 * 1000;
879	<	for (;;) {
877	>	long nanos = millis * (1000 * 1000);
878	>	final long wakeupTime = System.nanoTime() + nanos;
879	>	do {
880		if (millis > 0L)
881		Thread.sleep(millis);
882		else // too short to sleep
883		Thread.yield();
884	<	long d = ns - (System.nanoTime() - startTime);
885	<	if (d > 0L)
886	<	millis = d / (1000 * 1000);
887	<	else
888	<	break;
884	>	nanos = wakeupTime - System.nanoTime();
885	>	millis = nanos / (1000 * 1000);
886	>	} while (nanos >= 0L);
887	>	}
888	>
889	>	/**
890	>	* Allows use of try-with-resources with per-test thread pools.
891	>	*/
892	>	class PoolCleaner implements AutoCloseable {
893	>	private final ExecutorService pool;
894	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
895	>	public void close() { joinPool(pool); }
896	>	}
897	>
898	>	/**
899	>	* An extension of PoolCleaner that has an action to release the pool.
900	>	*/
901	>	class PoolCleanerWithReleaser extends PoolCleaner {
902	>	private final Runnable releaser;
903	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
904	>	super(pool);
905	>	this.releaser = releaser;
906		}
907	+	public void close() {
908	+	try {
909	+	releaser.run();
910	+	} finally {
911	+	super.close();
912	+	}
913	+	}
914	+	}
915	+
916	+	PoolCleaner cleaner(ExecutorService pool) {
917	+	return new PoolCleaner(pool);
918	+	}
919	+
920	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
921	+	return new PoolCleanerWithReleaser(pool, releaser);
922	+	}
923	+
924	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
925	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
926	+	}
927	+
928	+	Runnable releaser(final CountDownLatch latch) {
929	+	return new Runnable() { public void run() {
930	+	do { latch.countDown(); }
931	+	while (latch.getCount() > 0);
932	+	}};
933	+	}
934	+
935	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
936	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
937	+	}
938	+
939	+	Runnable releaser(final AtomicBoolean flag) {
940	+	return new Runnable() { public void run() { flag.set(true); }};
941		}
942
943		/**
944		* Waits out termination of a thread pool or fails doing so.
945		*/
946	<	void joinPool(ExecutorService exec) {
946	>	void joinPool(ExecutorService pool) {
947		try {
948	<	exec.shutdown();
949	<	assertTrue("ExecutorService did not terminate in a timely manner",
950	<	exec.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS));
948	>	pool.shutdown();
949	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
950	>	try {
951	>	threadFail("ExecutorService " + pool +
952	>	" did not terminate in a timely manner");
953	>	} finally {
954	>	// last resort, for the benefit of subsequent tests
955	>	pool.shutdownNow();
956	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
957	>	}
958	>	}
959		} catch (SecurityException ok) {
960		// Allowed in case test doesn't have privs
961	<	} catch (InterruptedException ie) {
962	<	fail("Unexpected InterruptedException");
961	>	} catch (InterruptedException fail) {
962	>	threadFail("Unexpected InterruptedException");
963		}
964		}
965
966		/**
967	<	* A debugging tool to print all stack traces, as jstack does.
967	>	* Like Runnable, but with the freedom to throw anything.
968	>	* junit folks had the same idea:
969	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
970		*/
971	<	static void printAllStackTraces() {
972	<	for (ThreadInfo info :
973	<	ManagementFactory.getThreadMXBean()
974	<	.dumpAllThreads(true, true))
971	>	interface Action { public void run() throws Throwable; }
972	>
973	>	/**
974	>	* Runs all the given actions in parallel, failing if any fail.
975	>	* Useful for running multiple variants of tests that are
976	>	* necessarily individually slow because they must block.
977	>	*/
978	>	void testInParallel(Action ... actions) {
979	>	ExecutorService pool = Executors.newCachedThreadPool();
980	>	try (PoolCleaner cleaner = cleaner(pool)) {
981	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
982	>	for (final Action action : actions)
983	>	futures.add(pool.submit(new CheckedRunnable() {
984	>	public void realRun() throws Throwable { action.run();}}));
985	>	for (Future<?> future : futures)
986	>	try {
987	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
988	>	} catch (ExecutionException ex) {
989	>	threadUnexpectedException(ex.getCause());
990	>	} catch (Exception ex) {
991	>	threadUnexpectedException(ex);
992	>	}
993	>	}
994	>	}
995	>
996	>	/**
997	>	* A debugging tool to print stack traces of most threads, as jstack does.
998	>	* Uninteresting threads are filtered out.
999	>	*/
1000	>	static void dumpTestThreads() {
1001	>	SecurityManager sm = System.getSecurityManager();
1002	>	if (sm != null) {
1003	>	try {
1004	>	System.setSecurityManager(null);
1005	>	} catch (SecurityException giveUp) {
1006	>	return;
1007	>	}
1008	>	}
1009	>
1010	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1011	>	System.err.println("------ stacktrace dump start ------");
1012	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1013	>	final String name = info.getThreadName();
1014	>	String lockName;
1015	>	if ("Signal Dispatcher".equals(name))
1016	>	continue;
1017	>	if ("Reference Handler".equals(name)
1018	>	&& (lockName = info.getLockName()) != null
1019	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1020	>	continue;
1021	>	if ("Finalizer".equals(name)
1022	>	&& (lockName = info.getLockName()) != null
1023	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1024	>	continue;
1025	>	if ("checkForWedgedTest".equals(name))
1026	>	continue;
1027		System.err.print(info);
1028	+	}
1029	+	System.err.println("------ stacktrace dump end ------");
1030	+
1031	+	if (sm != null) System.setSecurityManager(sm);
1032		}
1033
1034		/**
#	Line 622 | Line 1047 | public class JSR166TestCase extends Test
1047		// No need to optimize the failing case via Thread.join.
1048		delay(millis);
1049		assertTrue(thread.isAlive());
1050	<	} catch (InterruptedException ie) {
1051	<	fail("Unexpected InterruptedException");
1050	>	} catch (InterruptedException fail) {
1051	>	threadFail("Unexpected InterruptedException");
1052		}
1053		}
1054
#	Line 644 | Line 1069 | public class JSR166TestCase extends Test
1069		delay(millis);
1070		for (Thread thread : threads)
1071		assertTrue(thread.isAlive());
1072	<	} catch (InterruptedException ie) {
1073	<	fail("Unexpected InterruptedException");
1072	>	} catch (InterruptedException fail) {
1073	>	threadFail("Unexpected InterruptedException");
1074		}
1075		}
1076
#	Line 666 | Line 1091 | public class JSR166TestCase extends Test
1091		future.get(timeoutMillis, MILLISECONDS);
1092		shouldThrow();
1093		} catch (TimeoutException success) {
1094	<	} catch (Exception e) {
1095	<	threadUnexpectedException(e);
1094	>	} catch (Exception fail) {
1095	>	threadUnexpectedException(fail);
1096		} finally { future.cancel(true); }
1097		assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1098		}
#	Line 820 | Line 1245 | public class JSR166TestCase extends Test
1245		* Sleeps until the given time has elapsed.
1246		* Throws AssertionFailedError if interrupted.
1247		*/
1248	<	void sleep(long millis) {
1248	>	static void sleep(long millis) {
1249		try {
1250		delay(millis);
1251	<	} catch (InterruptedException ie) {
1251	>	} catch (InterruptedException fail) {
1252		AssertionFailedError afe =
1253		new AssertionFailedError("Unexpected InterruptedException");
1254	<	afe.initCause(ie);
1254	>	afe.initCause(fail);
1255		throw afe;
1256		}
1257		}
#	Line 836 | Line 1261 | public class JSR166TestCase extends Test
1261		* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1262		*/
1263		void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1264	<	long startTime = System.nanoTime();
1264	>	long startTime = 0L;
1265		for (;;) {
1266		Thread.State s = thread.getState();
1267		if (s == Thread.State.BLOCKED ||
#	Line 845 | Line 1270 | public class JSR166TestCase extends Test
1270		return;
1271		else if (s == Thread.State.TERMINATED)
1272		fail("Unexpected thread termination");
1273	+	else if (startTime == 0L)
1274	+	startTime = System.nanoTime();
1275		else if (millisElapsedSince(startTime) > timeoutMillis) {
1276		threadAssertTrue(thread.isAlive());
1277		return;
#	Line 864 | Line 1291 | public class JSR166TestCase extends Test
1291		/**
1292		* Returns the number of milliseconds since time given by
1293		* startNanoTime, which must have been previously returned from a
1294	<	* call to {@link System.nanoTime()}.
1294	>	* call to {@link System#nanoTime()}.
1295		*/
1296	<	long millisElapsedSince(long startNanoTime) {
1296	>	static long millisElapsedSince(long startNanoTime) {
1297		return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1298		}
1299
1300	+	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1301	+	//         long startTime = System.nanoTime();
1302	+	//         try {
1303	+	//             r.run();
1304	+	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1305	+	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1306	+	//             throw new AssertionFailedError("did not return promptly");
1307	+	//     }
1308	+
1309	+	//     void assertTerminatesPromptly(Runnable r) {
1310	+	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1311	+	//     }
1312	+
1313	+	/**
1314	+	* Checks that timed f.get() returns the expected value, and does not
1315	+	* wait for the timeout to elapse before returning.
1316	+	*/
1317	+	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1318	+	long startTime = System.nanoTime();
1319	+	try {
1320	+	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1321	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
1322	+	if (millisElapsedSince(startTime) > timeoutMillis/2)
1323	+	throw new AssertionFailedError("timed get did not return promptly");
1324	+	}
1325	+
1326	+	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1327	+	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1328	+	}
1329	+
1330		/**
1331		* Returns a new started daemon Thread running the given runnable.
1332		*/
#	Line 888 | Line 1345 | public class JSR166TestCase extends Test
1345		void awaitTermination(Thread t, long timeoutMillis) {
1346		try {
1347		t.join(timeoutMillis);
1348	<	} catch (InterruptedException ie) {
1349	<	threadUnexpectedException(ie);
1348	>	} catch (InterruptedException fail) {
1349	>	threadUnexpectedException(fail);
1350		} finally {
1351		if (t.getState() != Thread.State.TERMINATED) {
1352		t.interrupt();
1353	<	fail("Test timed out");
1353	>	threadFail("timed out waiting for thread to terminate");
1354		}
1355		}
1356		}
#	Line 915 | Line 1372 | public class JSR166TestCase extends Test
1372		public final void run() {
1373		try {
1374		realRun();
1375	<	} catch (Throwable t) {
1376	<	threadUnexpectedException(t);
1375	>	} catch (Throwable fail) {
1376	>	threadUnexpectedException(fail);
1377		}
1378		}
1379		}
#	Line 970 | Line 1427 | public class JSR166TestCase extends Test
1427		threadShouldThrow("InterruptedException");
1428		} catch (InterruptedException success) {
1429		threadAssertFalse(Thread.interrupted());
1430	<	} catch (Throwable t) {
1431	<	threadUnexpectedException(t);
1430	>	} catch (Throwable fail) {
1431	>	threadUnexpectedException(fail);
1432		}
1433		}
1434		}
#	Line 982 | Line 1439 | public class JSR166TestCase extends Test
1439		public final T call() {
1440		try {
1441		return realCall();
1442	<	} catch (Throwable t) {
1443	<	threadUnexpectedException(t);
1442	>	} catch (Throwable fail) {
1443	>	threadUnexpectedException(fail);
1444		return null;
1445		}
1446		}
#	Line 1000 | Line 1457 | public class JSR166TestCase extends Test
1457		return result;
1458		} catch (InterruptedException success) {
1459		threadAssertFalse(Thread.interrupted());
1460	<	} catch (Throwable t) {
1461	<	threadUnexpectedException(t);
1460	>	} catch (Throwable fail) {
1461	>	threadUnexpectedException(fail);
1462		}
1463		return null;
1464		}
#	Line 1018 | Line 1475 | public class JSR166TestCase extends Test
1475		public static final String TEST_STRING = "a test string";
1476
1477		public static class StringTask implements Callable<String> {
1478	<	public String call() { return TEST_STRING; }
1478	>	final String value;
1479	>	public StringTask() { this(TEST_STRING); }
1480	>	public StringTask(String value) { this.value = value; }
1481	>	public String call() { return value; }
1482		}
1483
1484		public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
#	Line 1031 | Line 1491 | public class JSR166TestCase extends Test
1491		}};
1492		}
1493
1494	<	public Runnable awaiter(final CountDownLatch latch) {
1494	>	public Runnable countDowner(final CountDownLatch latch) {
1495		return new CheckedRunnable() {
1496		public void realRun() throws InterruptedException {
1497	<	await(latch);
1497	>	latch.countDown();
1498		}};
1499		}
1500
1501	<	public void await(CountDownLatch latch) {
1501	>	class LatchAwaiter extends CheckedRunnable {
1502	>	static final int NEW = 0;
1503	>	static final int RUNNING = 1;
1504	>	static final int DONE = 2;
1505	>	final CountDownLatch latch;
1506	>	int state = NEW;
1507	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1508	>	public void realRun() throws InterruptedException {
1509	>	state = 1;
1510	>	await(latch);
1511	>	state = 2;
1512	>	}
1513	>	}
1514	>
1515	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1516	>	return new LatchAwaiter(latch);
1517	>	}
1518	>
1519	>	public void await(CountDownLatch latch, long timeoutMillis) {
1520		try {
1521	<	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1522	<	} catch (Throwable t) {
1523	<	threadUnexpectedException(t);
1521	>	if (!latch.await(timeoutMillis, MILLISECONDS))
1522	>	fail("timed out waiting for CountDownLatch for "
1523	>	+ (timeoutMillis/1000) + " sec");
1524	>	} catch (Throwable fail) {
1525	>	threadUnexpectedException(fail);
1526		}
1527		}
1528
1529	+	public void await(CountDownLatch latch) {
1530	+	await(latch, LONG_DELAY_MS);
1531	+	}
1532	+
1533		public void await(Semaphore semaphore) {
1534		try {
1535	<	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1536	<	} catch (Throwable t) {
1537	<	threadUnexpectedException(t);
1535	>	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1536	>	fail("timed out waiting for Semaphore for "
1537	>	+ (LONG_DELAY_MS/1000) + " sec");
1538	>	} catch (Throwable fail) {
1539	>	threadUnexpectedException(fail);
1540		}
1541		}
1542
#	Line 1244 | Line 1730 | public class JSR166TestCase extends Test
1730		@Override protected final void compute() {
1731		try {
1732		realCompute();
1733	<	} catch (Throwable t) {
1734	<	threadUnexpectedException(t);
1733	>	} catch (Throwable fail) {
1734	>	threadUnexpectedException(fail);
1735		}
1736		}
1737		}
#	Line 1259 | Line 1745 | public class JSR166TestCase extends Test
1745		@Override protected final T compute() {
1746		try {
1747		return realCompute();
1748	<	} catch (Throwable t) {
1749	<	threadUnexpectedException(t);
1748	>	} catch (Throwable fail) {
1749	>	threadUnexpectedException(fail);
1750		return null;
1751		}
1752		}
#	Line 1278 | Line 1764 | public class JSR166TestCase extends Test
1764		* A CyclicBarrier that uses timed await and fails with
1765		* AssertionFailedErrors instead of throwing checked exceptions.
1766		*/
1767	<	public class CheckedBarrier extends CyclicBarrier {
1767	>	public static class CheckedBarrier extends CyclicBarrier {
1768		public CheckedBarrier(int parties) { super(parties); }
1769
1770		public int await() {
1771		try {
1772		return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1773	<	} catch (TimeoutException e) {
1773	>	} catch (TimeoutException timedOut) {
1774		throw new AssertionFailedError("timed out");
1775	<	} catch (Exception e) {
1775	>	} catch (Exception fail) {
1776		AssertionFailedError afe =
1777	<	new AssertionFailedError("Unexpected exception: " + e);
1778	<	afe.initCause(e);
1777	>	new AssertionFailedError("Unexpected exception: " + fail);
1778	>	afe.initCause(fail);
1779		throw afe;
1780		}
1781		}
#	Line 1317 | Line 1803 | public class JSR166TestCase extends Test
1803		q.remove();
1804		shouldThrow();
1805		} catch (NoSuchElementException success) {}
1806	<	} catch (InterruptedException ie) {
1321	<	threadUnexpectedException(ie);
1322	<	}
1806	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1807		}
1808
1809		void assertSerialEquals(Object x, Object y) {
#	Line 1338 | Line 1822 | public class JSR166TestCase extends Test
1822		oos.flush();
1823		oos.close();
1824		return bos.toByteArray();
1825	<	} catch (Throwable t) {
1826	<	threadUnexpectedException(t);
1825	>	} catch (Throwable fail) {
1826	>	threadUnexpectedException(fail);
1827		return new byte[0];
1828		}
1829		}
1830
1831	+	void assertImmutable(final Object o) {
1832	+	if (o instanceof Collection) {
1833	+	assertThrows(
1834	+	UnsupportedOperationException.class,
1835	+	new Runnable() { public void run() {
1836	+	((Collection) o).add(null);}});
1837	+	}
1838	+	}
1839	+
1840		@SuppressWarnings("unchecked")
1841		<T> T serialClone(T o) {
1842		try {
1843		ObjectInputStream ois = new ObjectInputStream
1844		(new ByteArrayInputStream(serialBytes(o)));
1845		T clone = (T) ois.readObject();
1846	+	if (o == clone) assertImmutable(o);
1847		assertSame(o.getClass(), clone.getClass());
1848		return clone;
1849	<	} catch (Throwable t) {
1850	<	threadUnexpectedException(t);
1849	>	} catch (Throwable fail) {
1850	>	threadUnexpectedException(fail);
1851		return null;
1852		}
1853		}
1854
1855	+	/**
1856	+	* A version of serialClone that leaves error handling (for
1857	+	* e.g. NotSerializableException) up to the caller.
1858	+	*/
1859	+	@SuppressWarnings("unchecked")
1860	+	<T> T serialClonePossiblyFailing(T o)
1861	+	throws ReflectiveOperationException, java.io.IOException {
1862	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1863	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1864	+	oos.writeObject(o);
1865	+	oos.flush();
1866	+	oos.close();
1867	+	ObjectInputStream ois = new ObjectInputStream
1868	+	(new ByteArrayInputStream(bos.toByteArray()));
1869	+	T clone = (T) ois.readObject();
1870	+	if (o == clone) assertImmutable(o);
1871	+	assertSame(o.getClass(), clone.getClass());
1872	+	return clone;
1873	+	}
1874	+
1875	+	/**
1876	+	* If o implements Cloneable and has a public clone method,
1877	+	* returns a clone of o, else null.
1878	+	*/
1879	+	@SuppressWarnings("unchecked")
1880	+	<T> T cloneableClone(T o) {
1881	+	if (!(o instanceof Cloneable)) return null;
1882	+	final T clone;
1883	+	try {
1884	+	clone = (T) o.getClass().getMethod("clone").invoke(o);
1885	+	} catch (NoSuchMethodException ok) {
1886	+	return null;
1887	+	} catch (ReflectiveOperationException unexpected) {
1888	+	throw new Error(unexpected);
1889	+	}
1890	+	assertNotSame(o, clone); // not 100% guaranteed by spec
1891	+	assertSame(o.getClass(), clone.getClass());
1892	+	return clone;
1893	+	}
1894	+
1895		public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1896		Runnable... throwingActions) {
1897		for (Runnable throwingAction : throwingActions) {
#	Line 1378 | Line 1912 | public class JSR166TestCase extends Test
1912		shouldThrow(expectedExceptionClass.getName());
1913		}
1914		}
1915	+
1916	+	public void assertIteratorExhausted(Iterator<?> it) {
1917	+	try {
1918	+	it.next();
1919	+	shouldThrow();
1920	+	} catch (NoSuchElementException success) {}
1921	+	assertFalse(it.hasNext());
1922	+	}
1923	+
1924	+	public <T> Callable<T> callableThrowing(final Exception ex) {
1925	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1926	+	}
1927	+
1928	+	public Runnable runnableThrowing(final RuntimeException ex) {
1929	+	return new Runnable() { public void run() { throw ex; }};
1930	+	}
1931	+
1932	+	/** A reusable thread pool to be shared by tests. */
1933	+	static final ExecutorService cachedThreadPool =
1934	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1935	+	1000L, MILLISECONDS,
1936	+	new SynchronousQueue<Runnable>());
1937	+
1938	+	static <T> void shuffle(T[] array) {
1939	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1940	+	}
1941		}

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