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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.56 by jsr166, Sun Oct 3 23:59:05 2010 UTC vs.
Revision 1.212 by jsr166, Fri Dec 9 04:24:07 2016 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
10	<	import java.util.PropertyPermission;
11	<	import java.util.concurrent.*;
12	<	import java.util.concurrent.atomic.AtomicReference;
9	>	/*
10	>	* @test
11	>	* @summary JSR-166 tck tests
12	>	* @modules java.base/java.util.concurrent:open
13	>	*          java.management
14	>	* @build *
15	>	* @run junit/othervm/timeout=1000 -Djsr166.testImplementationDetails=true JSR166TestCase
16	>	* @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=0 -Djsr166.testImplementationDetails=true JSR166TestCase
17	>	* @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=1 -Djava.util.secureRandomSeed=true JSR166TestCase
18	>	*/
19	>
20		import static java.util.concurrent.TimeUnit.MILLISECONDS;
21	+	import static java.util.concurrent.TimeUnit.MINUTES;
22	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
23	+
24	+	import java.io.ByteArrayInputStream;
25	+	import java.io.ByteArrayOutputStream;
26	+	import java.io.ObjectInputStream;
27	+	import java.io.ObjectOutputStream;
28	+	import java.lang.management.ManagementFactory;
29	+	import java.lang.management.ThreadInfo;
30	+	import java.lang.management.ThreadMXBean;
31	+	import java.lang.reflect.Constructor;
32	+	import java.lang.reflect.Method;
33	+	import java.lang.reflect.Modifier;
34	+	import java.nio.file.Files;
35	+	import java.nio.file.Paths;
36		import java.security.CodeSource;
37		import java.security.Permission;
38		import java.security.PermissionCollection;
#	Line 18 | Line 40 | import java.security.Permissions;
40		import java.security.Policy;
41		import java.security.ProtectionDomain;
42		import java.security.SecurityPermission;
43	+	import java.util.ArrayList;
44	+	import java.util.Arrays;
45	+	import java.util.Collection;
46	+	import java.util.Collections;
47	+	import java.util.Date;
48	+	import java.util.Enumeration;
49	+	import java.util.Iterator;
50	+	import java.util.List;
51	+	import java.util.NoSuchElementException;
52	+	import java.util.PropertyPermission;
53	+	import java.util.concurrent.BlockingQueue;
54	+	import java.util.concurrent.Callable;
55	+	import java.util.concurrent.CountDownLatch;
56	+	import java.util.concurrent.CyclicBarrier;
57	+	import java.util.concurrent.ExecutionException;
58	+	import java.util.concurrent.Executors;
59	+	import java.util.concurrent.ExecutorService;
60	+	import java.util.concurrent.ForkJoinPool;
61	+	import java.util.concurrent.Future;
62	+	import java.util.concurrent.RecursiveAction;
63	+	import java.util.concurrent.RecursiveTask;
64	+	import java.util.concurrent.RejectedExecutionHandler;
65	+	import java.util.concurrent.Semaphore;
66	+	import java.util.concurrent.SynchronousQueue;
67	+	import java.util.concurrent.ThreadFactory;
68	+	import java.util.concurrent.ThreadLocalRandom;
69	+	import java.util.concurrent.ThreadPoolExecutor;
70	+	import java.util.concurrent.TimeoutException;
71	+	import java.util.concurrent.atomic.AtomicBoolean;
72	+	import java.util.concurrent.atomic.AtomicReference;
73	+	import java.util.regex.Matcher;
74	+	import java.util.regex.Pattern;
75	+
76	+	import junit.framework.AssertionFailedError;
77	+	import junit.framework.Test;
78	+	import junit.framework.TestCase;
79	+	import junit.framework.TestResult;
80	+	import junit.framework.TestSuite;
81
82		/**
83		* Base class for JSR166 Junit TCK tests.  Defines some constants,
#	Line 29 | Line 89 | import java.security.SecurityPermission;
89		*
90		* <ol>
91		*
92	<	* <li> All assertions in code running in generated threads must use
92	>	* <li>All assertions in code running in generated threads must use
93		* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
94		* #threadAssertEquals}, or {@link #threadAssertNull}, (not
95		* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
96		* particularly recommended) for other code to use these forms too.
97		* Only the most typically used JUnit assertion methods are defined
98	<	* this way, but enough to live with.</li>
98	>	* this way, but enough to live with.
99		*
100	<	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
100	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
101		* to invoke {@code super.setUp} and {@code super.tearDown} within
102		* them. These methods are used to clear and check for thread
103	<	* assertion failures.</li>
103	>	* assertion failures.
104		*
105		* <li>All delays and timeouts must use one of the constants {@code
106		* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
#	Line 51 | Line 111 | import java.security.SecurityPermission;
111		* is always discriminable as larger than SHORT and smaller than
112		* MEDIUM.  And so on. These constants are set to conservative values,
113		* but even so, if there is ever any doubt, they can all be increased
114	<	* in one spot to rerun tests on slower platforms.</li>
114	>	* in one spot to rerun tests on slower platforms.
115		*
116	<	* <li> All threads generated must be joined inside each test case
116	>	* <li>All threads generated must be joined inside each test case
117		* method (or {@code fail} to do so) before returning from the
118		* method. The {@code joinPool} method can be used to do this when
119	<	* using Executors.</li>
119	>	* using Executors.
120		*
121		* </ol>
122		*
123	<	* <p> <b>Other notes</b>
123	>	* <p><b>Other notes</b>
124		* <ul>
125		*
126	<	* <li> Usually, there is one testcase method per JSR166 method
126	>	* <li>Usually, there is one testcase method per JSR166 method
127		* covering "normal" operation, and then as many exception-testing
128		* methods as there are exceptions the method can throw. Sometimes
129		* there are multiple tests per JSR166 method when the different
130		* "normal" behaviors differ significantly. And sometimes testcases
131	<	* cover multiple methods when they cannot be tested in
72	<	* isolation.</li>
131	>	* cover multiple methods when they cannot be tested in isolation.
132		*
133	<	* <li> The documentation style for testcases is to provide as javadoc
133	>	* <li>The documentation style for testcases is to provide as javadoc
134		* a simple sentence or two describing the property that the testcase
135		* method purports to test. The javadocs do not say anything about how
136	<	* the property is tested. To find out, read the code.</li>
136	>	* the property is tested. To find out, read the code.
137		*
138	<	* <li> These tests are "conformance tests", and do not attempt to
138	>	* <li>These tests are "conformance tests", and do not attempt to
139		* test throughput, latency, scalability or other performance factors
140		* (see the separate "jtreg" tests for a set intended to check these
141		* for the most central aspects of functionality.) So, most tests use
142		* the smallest sensible numbers of threads, collection sizes, etc
143	<	* needed to check basic conformance.</li>
143	>	* needed to check basic conformance.
144		*
145		* <li>The test classes currently do not declare inclusion in
146		* any particular package to simplify things for people integrating
147	<	* them in TCK test suites.</li>
147	>	* them in TCK test suites.
148		*
149	<	* <li> As a convenience, the {@code main} of this class (JSR166TestCase)
150	<	* runs all JSR166 unit tests.</li>
149	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
150	>	* runs all JSR166 unit tests.
151		*
152		* </ul>
153		*/
#	Line 96 | Line 155 | public class JSR166TestCase extends Test
155		private static final boolean useSecurityManager =
156		Boolean.getBoolean("jsr166.useSecurityManager");
157
158	+	protected static final boolean expensiveTests =
159	+	Boolean.getBoolean("jsr166.expensiveTests");
160	+
161	+	/**
162	+	* If true, also run tests that are not part of the official tck
163	+	* because they test unspecified implementation details.
164	+	*/
165	+	protected static final boolean testImplementationDetails =
166	+	Boolean.getBoolean("jsr166.testImplementationDetails");
167	+
168	+	/**
169	+	* If true, report on stdout all "slow" tests, that is, ones that
170	+	* take more than profileThreshold milliseconds to execute.
171	+	*/
172	+	private static final boolean profileTests =
173	+	Boolean.getBoolean("jsr166.profileTests");
174	+
175	+	/**
176	+	* The number of milliseconds that tests are permitted for
177	+	* execution without being reported, when profileTests is set.
178	+	*/
179	+	private static final long profileThreshold =
180	+	Long.getLong("jsr166.profileThreshold", 100);
181	+
182	+	/**
183	+	* The number of repetitions per test (for tickling rare bugs).
184	+	*/
185	+	private static final int runsPerTest =
186	+	Integer.getInteger("jsr166.runsPerTest", 1);
187	+
188		/**
189	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
189	>	* The number of repetitions of the test suite (for finding leaks?).
190	>	*/
191	>	private static final int suiteRuns =
192	>	Integer.getInteger("jsr166.suiteRuns", 1);
193	>
194	>	/**
195	>	* Returns the value of the system property, or NaN if not defined.
196	>	*/
197	>	private static float systemPropertyValue(String name) {
198	>	String floatString = System.getProperty(name);
199	>	if (floatString == null)
200	>	return Float.NaN;
201	>	try {
202	>	return Float.parseFloat(floatString);
203	>	} catch (NumberFormatException ex) {
204	>	throw new IllegalArgumentException(
205	>	String.format("Bad float value in system property %s=%s",
206	>	name, floatString));
207	>	}
208	>	}
209	>
210	>	/**
211	>	* The scaling factor to apply to standard delays used in tests.
212	>	* May be initialized from any of:
213	>	* - the "jsr166.delay.factor" system property
214	>	* - the "test.timeout.factor" system property (as used by jtreg)
215	>	*   See: http://openjdk.java.net/jtreg/tag-spec.html
216	>	* - hard-coded fuzz factor when using a known slowpoke VM
217	>	*/
218	>	private static final float delayFactor = delayFactor();
219	>
220	>	private static float delayFactor() {
221	>	float x;
222	>	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
223	>	return x;
224	>	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
225	>	return x;
226	>	String prop = System.getProperty("java.vm.version");
227	>	if (prop != null && prop.matches(".*debug.*"))
228	>	return 4.0f; // How much slower is fastdebug than product?!
229	>	return 1.0f;
230	>	}
231	>
232	>	public JSR166TestCase() { super(); }
233	>	public JSR166TestCase(String name) { super(name); }
234	>
235	>	/**
236	>	* A filter for tests to run, matching strings of the form
237	>	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
238	>	* Usefully combined with jsr166.runsPerTest.
239	>	*/
240	>	private static final Pattern methodFilter = methodFilter();
241	>
242	>	private static Pattern methodFilter() {
243	>	String regex = System.getProperty("jsr166.methodFilter");
244	>	return (regex == null) ? null : Pattern.compile(regex);
245	>	}
246	>
247	>	// Instrumentation to debug very rare, but very annoying hung test runs.
248	>	static volatile TestCase currentTestCase;
249	>	// static volatile int currentRun = 0;
250	>	static {
251	>	Runnable checkForWedgedTest = new Runnable() { public void run() {
252	>	// Avoid spurious reports with enormous runsPerTest.
253	>	// A single test case run should never take more than 1 second.
254	>	// But let's cap it at the high end too ...
255	>	final int timeoutMinutes =
256	>	Math.min(15, Math.max(runsPerTest / 60, 1));
257	>	for (TestCase lastTestCase = currentTestCase;;) {
258	>	try { MINUTES.sleep(timeoutMinutes); }
259	>	catch (InterruptedException unexpected) { break; }
260	>	if (lastTestCase == currentTestCase) {
261	>	System.err.printf(
262	>	"Looks like we're stuck running test: %s%n",
263	>	lastTestCase);
264	>	//                     System.err.printf(
265	>	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
266	>	//                         lastTestCase, currentRun, runsPerTest);
267	>	//                     System.err.println("availableProcessors=" +
268	>	//                         Runtime.getRuntime().availableProcessors());
269	>	//                     System.err.printf("cpu model = %s%n", cpuModel());
270	>	dumpTestThreads();
271	>	// one stack dump is probably enough; more would be spam
272	>	break;
273	>	}
274	>	lastTestCase = currentTestCase;
275	>	}}};
276	>	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
277	>	thread.setDaemon(true);
278	>	thread.start();
279	>	}
280	>
281	>	//     public static String cpuModel() {
282	>	//         try {
283	>	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
284	>	//                 .matcher(new String(
285	>	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
286	>	//             matcher.find();
287	>	//             return matcher.group(1);
288	>	//         } catch (Exception ex) { return null; }
289	>	//     }
290	>
291	>	public void runBare() throws Throwable {
292	>	currentTestCase = this;
293	>	if (methodFilter == null
294	>	|| methodFilter.matcher(toString()).find())
295	>	super.runBare();
296	>	}
297	>
298	>	protected void runTest() throws Throwable {
299	>	for (int i = 0; i < runsPerTest; i++) {
300	>	// currentRun = i;
301	>	if (profileTests)
302	>	runTestProfiled();
303	>	else
304	>	super.runTest();
305	>	}
306	>	}
307	>
308	>	protected void runTestProfiled() throws Throwable {
309	>	for (int i = 0; i < 2; i++) {
310	>	long startTime = System.nanoTime();
311	>	super.runTest();
312	>	long elapsedMillis = millisElapsedSince(startTime);
313	>	if (elapsedMillis < profileThreshold)
314	>	break;
315	>	// Never report first run of any test; treat it as a
316	>	// warmup run, notably to trigger all needed classloading,
317	>	if (i > 0)
318	>	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
319	>	}
320	>	}
321	>
322	>	/**
323	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
324		*/
325		public static void main(String[] args) {
326	+	main(suite(), args);
327	+	}
328	+
329	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
330	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
331	+	long runTime;
332	+	public void startTest(Test test) {}
333	+	protected void printHeader(long runTime) {
334	+	this.runTime = runTime; // defer printing for later
335	+	}
336	+	protected void printFooter(TestResult result) {
337	+	if (result.wasSuccessful()) {
338	+	getWriter().println("OK (" + result.runCount() + " tests)"
339	+	+ "  Time: " + elapsedTimeAsString(runTime));
340	+	} else {
341	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
342	+	super.printFooter(result);
343	+	}
344	+	}
345	+	}
346	+
347	+	/**
348	+	* Returns a TestRunner that doesn't bother with unnecessary
349	+	* fluff, like printing a "." for each test case.
350	+	*/
351	+	static junit.textui.TestRunner newPithyTestRunner() {
352	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
353	+	runner.setPrinter(new PithyResultPrinter(System.out));
354	+	return runner;
355	+	}
356	+
357	+	/**
358	+	* Runs all unit tests in the given test suite.
359	+	* Actual behavior influenced by jsr166.* system properties.
360	+	*/
361	+	static void main(Test suite, String[] args) {
362		if (useSecurityManager) {
363		System.err.println("Setting a permissive security manager");
364		Policy.setPolicy(permissivePolicy());
365		System.setSecurityManager(new SecurityManager());
366		}
367	<	int iters = (args.length == 0) ? 1 : Integer.parseInt(args[0]);
368	<
369	<	Test s = suite();
370	<	for (int i = 0; i < iters; ++i) {
112	<	junit.textui.TestRunner.run(s);
367	>	for (int i = 0; i < suiteRuns; i++) {
368	>	TestResult result = newPithyTestRunner().doRun(suite);
369	>	if (!result.wasSuccessful())
370	>	System.exit(1);
371		System.gc();
372		System.runFinalization();
373		}
374	<	System.exit(0);
374	>	}
375	>
376	>	public static TestSuite newTestSuite(Object... suiteOrClasses) {
377	>	TestSuite suite = new TestSuite();
378	>	for (Object suiteOrClass : suiteOrClasses) {
379	>	if (suiteOrClass instanceof TestSuite)
380	>	suite.addTest((TestSuite) suiteOrClass);
381	>	else if (suiteOrClass instanceof Class)
382	>	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
383	>	else
384	>	throw new ClassCastException("not a test suite or class");
385	>	}
386	>	return suite;
387	>	}
388	>
389	>	public static void addNamedTestClasses(TestSuite suite,
390	>	String... testClassNames) {
391	>	for (String testClassName : testClassNames) {
392	>	try {
393	>	Class<?> testClass = Class.forName(testClassName);
394	>	Method m = testClass.getDeclaredMethod("suite",
395	>	new Class<?>[0]);
396	>	suite.addTest(newTestSuite((Test)m.invoke(null)));
397	>	} catch (Exception e) {
398	>	throw new Error("Missing test class", e);
399	>	}
400	>	}
401	>	}
402	>
403	>	public static final double JAVA_CLASS_VERSION;
404	>	public static final String JAVA_SPECIFICATION_VERSION;
405	>	static {
406	>	try {
407	>	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
408	>	new java.security.PrivilegedAction<Double>() {
409	>	public Double run() {
410	>	return Double.valueOf(System.getProperty("java.class.version"));}});
411	>	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
412	>	new java.security.PrivilegedAction<String>() {
413	>	public String run() {
414	>	return System.getProperty("java.specification.version");}});
415	>	} catch (Throwable t) {
416	>	throw new Error(t);
417	>	}
418	>	}
419	>
420	>	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
421	>	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
422	>	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
423	>	public static boolean atLeastJava9() {
424	>	return JAVA_CLASS_VERSION >= 53.0
425	>	// As of 2015-09, java9 still uses 52.0 class file version
426	>	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
427	>	}
428	>	public static boolean atLeastJava10() {
429	>	return JAVA_CLASS_VERSION >= 54.0
430	>	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
431		}
432
433		/**
434	<	* Collects all JSR166 unit tests as one suite
434	>	* Collects all JSR166 unit tests as one suite.
435		*/
436		public static Test suite() {
437	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
438	<
439	<	suite.addTest(ForkJoinPoolTest.suite());
440	<	suite.addTest(ForkJoinTaskTest.suite());
441	<	suite.addTest(RecursiveActionTest.suite());
442	<	suite.addTest(RecursiveTaskTest.suite());
443	<	suite.addTest(LinkedTransferQueueTest.suite());
444	<	suite.addTest(PhaserTest.suite());
445	<	suite.addTest(ThreadLocalRandomTest.suite());
446	<	suite.addTest(AbstractExecutorServiceTest.suite());
447	<	suite.addTest(AbstractQueueTest.suite());
448	<	suite.addTest(AbstractQueuedSynchronizerTest.suite());
449	<	suite.addTest(AbstractQueuedLongSynchronizerTest.suite());
450	<	suite.addTest(ArrayBlockingQueueTest.suite());
451	<	suite.addTest(ArrayDequeTest.suite());
452	<	suite.addTest(AtomicBooleanTest.suite());
453	<	suite.addTest(AtomicIntegerArrayTest.suite());
454	<	suite.addTest(AtomicIntegerFieldUpdaterTest.suite());
455	<	suite.addTest(AtomicIntegerTest.suite());
456	<	suite.addTest(AtomicLongArrayTest.suite());
457	<	suite.addTest(AtomicLongFieldUpdaterTest.suite());
458	<	suite.addTest(AtomicLongTest.suite());
459	<	suite.addTest(AtomicMarkableReferenceTest.suite());
460	<	suite.addTest(AtomicReferenceArrayTest.suite());
461	<	suite.addTest(AtomicReferenceFieldUpdaterTest.suite());
462	<	suite.addTest(AtomicReferenceTest.suite());
463	<	suite.addTest(AtomicStampedReferenceTest.suite());
464	<	suite.addTest(ConcurrentHashMapTest.suite());
465	<	suite.addTest(ConcurrentLinkedDequeTest.suite());
466	<	suite.addTest(ConcurrentLinkedQueueTest.suite());
467	<	suite.addTest(ConcurrentSkipListMapTest.suite());
468	<	suite.addTest(ConcurrentSkipListSubMapTest.suite());
469	<	suite.addTest(ConcurrentSkipListSetTest.suite());
470	<	suite.addTest(ConcurrentSkipListSubSetTest.suite());
471	<	suite.addTest(CopyOnWriteArrayListTest.suite());
472	<	suite.addTest(CopyOnWriteArraySetTest.suite());
473	<	suite.addTest(CountDownLatchTest.suite());
474	<	suite.addTest(CyclicBarrierTest.suite());
475	<	suite.addTest(DelayQueueTest.suite());
476	<	suite.addTest(EntryTest.suite());
477	<	suite.addTest(ExchangerTest.suite());
478	<	suite.addTest(ExecutorsTest.suite());
479	<	suite.addTest(ExecutorCompletionServiceTest.suite());
480	<	suite.addTest(FutureTaskTest.suite());
481	<	suite.addTest(LinkedBlockingDequeTest.suite());
482	<	suite.addTest(LinkedBlockingQueueTest.suite());
483	<	suite.addTest(LinkedListTest.suite());
484	<	suite.addTest(LockSupportTest.suite());
485	<	suite.addTest(PriorityBlockingQueueTest.suite());
486	<	suite.addTest(PriorityQueueTest.suite());
487	<	suite.addTest(ReentrantLockTest.suite());
488	<	suite.addTest(ReentrantReadWriteLockTest.suite());
489	<	suite.addTest(ScheduledExecutorTest.suite());
490	<	suite.addTest(ScheduledExecutorSubclassTest.suite());
491	<	suite.addTest(SemaphoreTest.suite());
492	<	suite.addTest(SynchronousQueueTest.suite());
493	<	suite.addTest(SystemTest.suite());
494	<	suite.addTest(ThreadLocalTest.suite());
495	<	suite.addTest(ThreadPoolExecutorTest.suite());
496	<	suite.addTest(ThreadPoolExecutorSubclassTest.suite());
497	<	suite.addTest(ThreadTest.suite());
498	<	suite.addTest(TimeUnitTest.suite());
499	<	suite.addTest(TreeMapTest.suite());
500	<	suite.addTest(TreeSetTest.suite());
501	<	suite.addTest(TreeSubMapTest.suite());
502	<	suite.addTest(TreeSubSetTest.suite());
437	>	// Java7+ test classes
438	>	TestSuite suite = newTestSuite(
439	>	ForkJoinPoolTest.suite(),
440	>	ForkJoinTaskTest.suite(),
441	>	RecursiveActionTest.suite(),
442	>	RecursiveTaskTest.suite(),
443	>	LinkedTransferQueueTest.suite(),
444	>	PhaserTest.suite(),
445	>	ThreadLocalRandomTest.suite(),
446	>	AbstractExecutorServiceTest.suite(),
447	>	AbstractQueueTest.suite(),
448	>	AbstractQueuedSynchronizerTest.suite(),
449	>	AbstractQueuedLongSynchronizerTest.suite(),
450	>	ArrayBlockingQueueTest.suite(),
451	>	ArrayDequeTest.suite(),
452	>	ArrayListTest.suite(),
453	>	AtomicBooleanTest.suite(),
454	>	AtomicIntegerArrayTest.suite(),
455	>	AtomicIntegerFieldUpdaterTest.suite(),
456	>	AtomicIntegerTest.suite(),
457	>	AtomicLongArrayTest.suite(),
458	>	AtomicLongFieldUpdaterTest.suite(),
459	>	AtomicLongTest.suite(),
460	>	AtomicMarkableReferenceTest.suite(),
461	>	AtomicReferenceArrayTest.suite(),
462	>	AtomicReferenceFieldUpdaterTest.suite(),
463	>	AtomicReferenceTest.suite(),
464	>	AtomicStampedReferenceTest.suite(),
465	>	ConcurrentHashMapTest.suite(),
466	>	ConcurrentLinkedDequeTest.suite(),
467	>	ConcurrentLinkedQueueTest.suite(),
468	>	ConcurrentSkipListMapTest.suite(),
469	>	ConcurrentSkipListSubMapTest.suite(),
470	>	ConcurrentSkipListSetTest.suite(),
471	>	ConcurrentSkipListSubSetTest.suite(),
472	>	CopyOnWriteArrayListTest.suite(),
473	>	CopyOnWriteArraySetTest.suite(),
474	>	CountDownLatchTest.suite(),
475	>	CountedCompleterTest.suite(),
476	>	CyclicBarrierTest.suite(),
477	>	DelayQueueTest.suite(),
478	>	EntryTest.suite(),
479	>	ExchangerTest.suite(),
480	>	ExecutorsTest.suite(),
481	>	ExecutorCompletionServiceTest.suite(),
482	>	FutureTaskTest.suite(),
483	>	LinkedBlockingDequeTest.suite(),
484	>	LinkedBlockingQueueTest.suite(),
485	>	LinkedListTest.suite(),
486	>	LockSupportTest.suite(),
487	>	PriorityBlockingQueueTest.suite(),
488	>	PriorityQueueTest.suite(),
489	>	ReentrantLockTest.suite(),
490	>	ReentrantReadWriteLockTest.suite(),
491	>	ScheduledExecutorTest.suite(),
492	>	ScheduledExecutorSubclassTest.suite(),
493	>	SemaphoreTest.suite(),
494	>	SynchronousQueueTest.suite(),
495	>	SystemTest.suite(),
496	>	ThreadLocalTest.suite(),
497	>	ThreadPoolExecutorTest.suite(),
498	>	ThreadPoolExecutorSubclassTest.suite(),
499	>	ThreadTest.suite(),
500	>	TimeUnitTest.suite(),
501	>	TreeMapTest.suite(),
502	>	TreeSetTest.suite(),
503	>	TreeSubMapTest.suite(),
504	>	TreeSubSetTest.suite(),
505	>	VectorTest.suite());
506	>
507	>	// Java8+ test classes
508	>	if (atLeastJava8()) {
509	>	String[] java8TestClassNames = {
510	>	"ArrayDeque8Test",
511	>	"Atomic8Test",
512	>	"CompletableFutureTest",
513	>	"ConcurrentHashMap8Test",
514	>	"CountedCompleter8Test",
515	>	"DoubleAccumulatorTest",
516	>	"DoubleAdderTest",
517	>	"ForkJoinPool8Test",
518	>	"ForkJoinTask8Test",
519	>	"LongAccumulatorTest",
520	>	"LongAdderTest",
521	>	"SplittableRandomTest",
522	>	"StampedLockTest",
523	>	"SubmissionPublisherTest",
524	>	"ThreadLocalRandom8Test",
525	>	"TimeUnit8Test",
526	>	};
527	>	addNamedTestClasses(suite, java8TestClassNames);
528	>	}
529	>
530	>	// Java9+ test classes
531	>	if (atLeastJava9()) {
532	>	String[] java9TestClassNames = {
533	>	"AtomicBoolean9Test",
534	>	"AtomicInteger9Test",
535	>	"AtomicIntegerArray9Test",
536	>	"AtomicLong9Test",
537	>	"AtomicLongArray9Test",
538	>	"AtomicReference9Test",
539	>	"AtomicReferenceArray9Test",
540	>	"ExecutorCompletionService9Test",
541	>	};
542	>	addNamedTestClasses(suite, java9TestClassNames);
543	>	}
544
545		return suite;
546		}
547
548	+	/** Returns list of junit-style test method names in given class. */
549	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
550	+	Method[] methods = testClass.getDeclaredMethods();
551	+	ArrayList<String> names = new ArrayList<String>(methods.length);
552	+	for (Method method : methods) {
553	+	if (method.getName().startsWith("test")
554	+	&& Modifier.isPublic(method.getModifiers())
555	+	// method.getParameterCount() requires jdk8+
556	+	&& method.getParameterTypes().length == 0) {
557	+	names.add(method.getName());
558	+	}
559	+	}
560	+	return names;
561	+	}
562	+
563	+	/**
564	+	* Returns junit-style testSuite for the given test class, but
565	+	* parameterized by passing extra data to each test.
566	+	*/
567	+	public static <ExtraData> Test parameterizedTestSuite
568	+	(Class<? extends JSR166TestCase> testClass,
569	+	Class<ExtraData> dataClass,
570	+	ExtraData data) {
571	+	try {
572	+	TestSuite suite = new TestSuite();
573	+	Constructor c =
574	+	testClass.getDeclaredConstructor(dataClass, String.class);
575	+	for (String methodName : testMethodNames(testClass))
576	+	suite.addTest((Test) c.newInstance(data, methodName));
577	+	return suite;
578	+	} catch (Exception e) {
579	+	throw new Error(e);
580	+	}
581	+	}
582	+
583	+	/**
584	+	* Returns junit-style testSuite for the jdk8 extension of the
585	+	* given test class, but parameterized by passing extra data to
586	+	* each test.  Uses reflection to allow compilation in jdk7.
587	+	*/
588	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
589	+	(Class<? extends JSR166TestCase> testClass,
590	+	Class<ExtraData> dataClass,
591	+	ExtraData data) {
592	+	if (atLeastJava8()) {
593	+	String name = testClass.getName();
594	+	String name8 = name.replaceAll("Test$", "8Test");
595	+	if (name.equals(name8)) throw new Error(name);
596	+	try {
597	+	return (Test)
598	+	Class.forName(name8)
599	+	.getMethod("testSuite", new Class[] { dataClass })
600	+	.invoke(null, data);
601	+	} catch (Exception e) {
602	+	throw new Error(e);
603	+	}
604	+	} else {
605	+	return new TestSuite();
606	+	}
607	+	}
608	+
609	+	// Delays for timing-dependent tests, in milliseconds.
610
611		public static long SHORT_DELAY_MS;
612		public static long SMALL_DELAY_MS;
613		public static long MEDIUM_DELAY_MS;
614		public static long LONG_DELAY_MS;
615
199	–
616		/**
617	<	* Returns the shortest timed delay. This could
618	<	* be reimplemented to use for example a Property.
617	>	* Returns the shortest timed delay. This can be scaled up for
618	>	* slow machines using the jsr166.delay.factor system property,
619	>	* or via jtreg's -timeoutFactor: flag.
620	>	* http://openjdk.java.net/jtreg/command-help.html
621		*/
622		protected long getShortDelay() {
623	<	return 50;
623	>	return (long) (50 * delayFactor);
624		}
625
208	–
626		/**
627		* Sets delays as multiples of SHORT_DELAY.
628		*/
#	Line 213 | Line 630 | public class JSR166TestCase extends Test
630		SHORT_DELAY_MS = getShortDelay();
631		SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
632		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
633	<	LONG_DELAY_MS   = SHORT_DELAY_MS * 50;
633	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
634	>	}
635	>
636	>	/**
637	>	* Returns a timeout in milliseconds to be used in tests that
638	>	* verify that operations block or time out.
639	>	*/
640	>	long timeoutMillis() {
641	>	return SHORT_DELAY_MS / 4;
642	>	}
643	>
644	>	/**
645	>	* Returns a new Date instance representing a time at least
646	>	* delayMillis milliseconds in the future.
647	>	*/
648	>	Date delayedDate(long delayMillis) {
649	>	// Add 1 because currentTimeMillis is known to round into the past.
650	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
651		}
652
653		/**
#	Line 229 | Line 663 | public class JSR166TestCase extends Test
663		* the same test have no effect.
664		*/
665		public void threadRecordFailure(Throwable t) {
666	+	System.err.println(t);
667	+	dumpTestThreads();
668		threadFailure.compareAndSet(null, t);
669		}
670
#	Line 236 | Line 672 | public class JSR166TestCase extends Test
672		setDelays();
673		}
674
675	+	void tearDownFail(String format, Object... args) {
676	+	String msg = toString() + ": " + String.format(format, args);
677	+	System.err.println(msg);
678	+	dumpTestThreads();
679	+	throw new AssertionFailedError(msg);
680	+	}
681	+
682		/**
683	+	* Extra checks that get done for all test cases.
684	+	*
685		* Triggers test case failure if any thread assertions have failed,
686		* by rethrowing, in the test harness thread, any exception recorded
687		* earlier by threadRecordFailure.
688	+	*
689	+	* Triggers test case failure if interrupt status is set in the main thread.
690		*/
691		public void tearDown() throws Exception {
692	<	Throwable t = threadFailure.get();
692	>	Throwable t = threadFailure.getAndSet(null);
693		if (t != null) {
694		if (t instanceof Error)
695		throw (Error) t;
#	Line 250 | Line 697 | public class JSR166TestCase extends Test
697		throw (RuntimeException) t;
698		else if (t instanceof Exception)
699		throw (Exception) t;
700	<	else
701	<	throw new AssertionError(t);
700	>	else {
701	>	AssertionFailedError afe =
702	>	new AssertionFailedError(t.toString());
703	>	afe.initCause(t);
704	>	throw afe;
705	>	}
706		}
707	+
708	+	if (Thread.interrupted())
709	+	tearDownFail("interrupt status set in main thread");
710	+
711	+	checkForkJoinPoolThreadLeaks();
712	+	}
713	+
714	+	/**
715	+	* Finds missing PoolCleaners
716	+	*/
717	+	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
718	+	Thread[] survivors = new Thread[7];
719	+	int count = Thread.enumerate(survivors);
720	+	for (int i = 0; i < count; i++) {
721	+	Thread thread = survivors[i];
722	+	String name = thread.getName();
723	+	if (name.startsWith("ForkJoinPool-")) {
724	+	// give thread some time to terminate
725	+	thread.join(LONG_DELAY_MS);
726	+	if (thread.isAlive())
727	+	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
728	+	thread);
729	+	}
730	+	}
731	+
732	+	if (!ForkJoinPool.commonPool()
733	+	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
734	+	tearDownFail("ForkJoin common pool thread stuck");
735		}
736
737		/**
738		* Just like fail(reason), but additionally recording (using
739	<	* threadRecordFailure) any AssertionError thrown, so that the current
740	<	* testcase will fail.
739	>	* threadRecordFailure) any AssertionFailedError thrown, so that
740	>	* the current testcase will fail.
741		*/
742		public void threadFail(String reason) {
743		try {
744		fail(reason);
745	<	} catch (Throwable t) {
745	>	} catch (AssertionFailedError t) {
746		threadRecordFailure(t);
747	<	fail(reason);
747	>	throw t;
748		}
749		}
750
751		/**
752		* Just like assertTrue(b), but additionally recording (using
753	<	* threadRecordFailure) any AssertionError thrown, so that the current
754	<	* testcase will fail.
753	>	* threadRecordFailure) any AssertionFailedError thrown, so that
754	>	* the current testcase will fail.
755		*/
756		public void threadAssertTrue(boolean b) {
757		try {
758		assertTrue(b);
759	<	} catch (AssertionError t) {
759	>	} catch (AssertionFailedError t) {
760		threadRecordFailure(t);
761		throw t;
762		}
#	Line 285 | Line 764 | public class JSR166TestCase extends Test
764
765		/**
766		* Just like assertFalse(b), but additionally recording (using
767	<	* threadRecordFailure) any AssertionError thrown, so that the
768	<	* current testcase will fail.
767	>	* threadRecordFailure) any AssertionFailedError thrown, so that
768	>	* the current testcase will fail.
769		*/
770		public void threadAssertFalse(boolean b) {
771		try {
772		assertFalse(b);
773	<	} catch (AssertionError t) {
773	>	} catch (AssertionFailedError t) {
774		threadRecordFailure(t);
775		throw t;
776		}
#	Line 299 | Line 778 | public class JSR166TestCase extends Test
778
779		/**
780		* Just like assertNull(x), but additionally recording (using
781	<	* threadRecordFailure) any AssertionError thrown, so that the
782	<	* current testcase will fail.
781	>	* threadRecordFailure) any AssertionFailedError thrown, so that
782	>	* the current testcase will fail.
783		*/
784		public void threadAssertNull(Object x) {
785		try {
786		assertNull(x);
787	<	} catch (AssertionError t) {
787	>	} catch (AssertionFailedError t) {
788		threadRecordFailure(t);
789		throw t;
790		}
#	Line 313 | Line 792 | public class JSR166TestCase extends Test
792
793		/**
794		* Just like assertEquals(x, y), but additionally recording (using
795	<	* threadRecordFailure) any AssertionError thrown, so that the
796	<	* current testcase will fail.
795	>	* threadRecordFailure) any AssertionFailedError thrown, so that
796	>	* the current testcase will fail.
797		*/
798		public void threadAssertEquals(long x, long y) {
799		try {
800		assertEquals(x, y);
801	<	} catch (AssertionError t) {
801	>	} catch (AssertionFailedError t) {
802		threadRecordFailure(t);
803		throw t;
804		}
#	Line 327 | Line 806 | public class JSR166TestCase extends Test
806
807		/**
808		* Just like assertEquals(x, y), but additionally recording (using
809	<	* threadRecordFailure) any AssertionError thrown, so that the
810	<	* current testcase will fail.
809	>	* threadRecordFailure) any AssertionFailedError thrown, so that
810	>	* the current testcase will fail.
811		*/
812		public void threadAssertEquals(Object x, Object y) {
813		try {
814		assertEquals(x, y);
815	<	} catch (AssertionError t) {
816	<	threadRecordFailure(t);
817	<	throw t;
815	>	} catch (AssertionFailedError fail) {
816	>	threadRecordFailure(fail);
817	>	throw fail;
818	>	} catch (Throwable fail) {
819	>	threadUnexpectedException(fail);
820		}
821		}
822
823		/**
824		* Just like assertSame(x, y), but additionally recording (using
825	<	* threadRecordFailure) any AssertionError thrown, so that the
826	<	* current testcase will fail.
825	>	* threadRecordFailure) any AssertionFailedError thrown, so that
826	>	* the current testcase will fail.
827		*/
828		public void threadAssertSame(Object x, Object y) {
829		try {
830		assertSame(x, y);
831	<	} catch (AssertionError t) {
832	<	threadRecordFailure(t);
833	<	throw t;
831	>	} catch (AssertionFailedError fail) {
832	>	threadRecordFailure(fail);
833	>	throw fail;
834		}
835		}
836
#	Line 368 | Line 849 | public class JSR166TestCase extends Test
849		}
850
851		/**
852	<	* Calls threadFail with message "Unexpected exception" + ex.
852	>	* Records the given exception using {@link #threadRecordFailure},
853	>	* then rethrows the exception, wrapping it in an
854	>	* AssertionFailedError if necessary.
855		*/
856		public void threadUnexpectedException(Throwable t) {
857		threadRecordFailure(t);
858		t.printStackTrace();
376	–	// Rethrow, wrapping in an AssertionError if necessary
859		if (t instanceof RuntimeException)
860		throw (RuntimeException) t;
861		else if (t instanceof Error)
862		throw (Error) t;
863		else {
864	<	AssertionError ae = new AssertionError("unexpected exception: " + t);
865	<	t.initCause(t);
866	<	throw ae;
864	>	AssertionFailedError afe =
865	>	new AssertionFailedError("unexpected exception: " + t);
866	>	afe.initCause(t);
867	>	throw afe;
868		}
869		}
870
871		/**
872	+	* Delays, via Thread.sleep, for the given millisecond delay, but
873	+	* if the sleep is shorter than specified, may re-sleep or yield
874	+	* until time elapses.  Ensures that the given time, as measured
875	+	* by System.nanoTime(), has elapsed.
876	+	*/
877	+	static void delay(long millis) throws InterruptedException {
878	+	long nanos = millis * (1000 * 1000);
879	+	final long wakeupTime = System.nanoTime() + nanos;
880	+	do {
881	+	if (millis > 0L)
882	+	Thread.sleep(millis);
883	+	else // too short to sleep
884	+	Thread.yield();
885	+	nanos = wakeupTime - System.nanoTime();
886	+	millis = nanos / (1000 * 1000);
887	+	} while (nanos >= 0L);
888	+	}
889	+
890	+	/**
891	+	* Allows use of try-with-resources with per-test thread pools.
892	+	*/
893	+	class PoolCleaner implements AutoCloseable {
894	+	private final ExecutorService pool;
895	+	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
896	+	public void close() { joinPool(pool); }
897	+	}
898	+
899	+	/**
900	+	* An extension of PoolCleaner that has an action to release the pool.
901	+	*/
902	+	class PoolCleanerWithReleaser extends PoolCleaner {
903	+	private final Runnable releaser;
904	+	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
905	+	super(pool);
906	+	this.releaser = releaser;
907	+	}
908	+	public void close() {
909	+	try {
910	+	releaser.run();
911	+	} finally {
912	+	super.close();
913	+	}
914	+	}
915	+	}
916	+
917	+	PoolCleaner cleaner(ExecutorService pool) {
918	+	return new PoolCleaner(pool);
919	+	}
920	+
921	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
922	+	return new PoolCleanerWithReleaser(pool, releaser);
923	+	}
924	+
925	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
926	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
927	+	}
928	+
929	+	Runnable releaser(final CountDownLatch latch) {
930	+	return new Runnable() { public void run() {
931	+	do { latch.countDown(); }
932	+	while (latch.getCount() > 0);
933	+	}};
934	+	}
935	+
936	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
937	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
938	+	}
939	+
940	+	Runnable releaser(final AtomicBoolean flag) {
941	+	return new Runnable() { public void run() { flag.set(true); }};
942	+	}
943	+
944	+	/**
945		* Waits out termination of a thread pool or fails doing so.
946		*/
947	<	public void joinPool(ExecutorService exec) {
947	>	void joinPool(ExecutorService pool) {
948		try {
949	<	exec.shutdown();
950	<	assertTrue("ExecutorService did not terminate in a timely manner",
951	<	exec.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
949	>	pool.shutdown();
950	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
951	>	try {
952	>	threadFail("ExecutorService " + pool +
953	>	" did not terminate in a timely manner");
954	>	} finally {
955	>	// last resort, for the benefit of subsequent tests
956	>	pool.shutdownNow();
957	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
958	>	}
959	>	}
960		} catch (SecurityException ok) {
961		// Allowed in case test doesn't have privs
962	<	} catch (InterruptedException ie) {
963	<	fail("Unexpected InterruptedException");
962	>	} catch (InterruptedException fail) {
963	>	threadFail("Unexpected InterruptedException");
964	>	}
965	>	}
966	>
967	>	/**
968	>	* Like Runnable, but with the freedom to throw anything.
969	>	* junit folks had the same idea:
970	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
971	>	*/
972	>	interface Action { public void run() throws Throwable; }
973	>
974	>	/**
975	>	* Runs all the given actions in parallel, failing if any fail.
976	>	* Useful for running multiple variants of tests that are
977	>	* necessarily individually slow because they must block.
978	>	*/
979	>	void testInParallel(Action ... actions) {
980	>	ExecutorService pool = Executors.newCachedThreadPool();
981	>	try (PoolCleaner cleaner = cleaner(pool)) {
982	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
983	>	for (final Action action : actions)
984	>	futures.add(pool.submit(new CheckedRunnable() {
985	>	public void realRun() throws Throwable { action.run();}}));
986	>	for (Future<?> future : futures)
987	>	try {
988	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
989	>	} catch (ExecutionException ex) {
990	>	threadUnexpectedException(ex.getCause());
991	>	} catch (Exception ex) {
992	>	threadUnexpectedException(ex);
993	>	}
994	>	}
995	>	}
996	>
997	>	/**
998	>	* A debugging tool to print stack traces of most threads, as jstack does.
999	>	* Uninteresting threads are filtered out.
1000	>	*/
1001	>	static void dumpTestThreads() {
1002	>	SecurityManager sm = System.getSecurityManager();
1003	>	if (sm != null) {
1004	>	try {
1005	>	System.setSecurityManager(null);
1006	>	} catch (SecurityException giveUp) {
1007	>	return;
1008	>	}
1009	>	}
1010	>
1011	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1012	>	System.err.println("------ stacktrace dump start ------");
1013	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1014	>	final String name = info.getThreadName();
1015	>	String lockName;
1016	>	if ("Signal Dispatcher".equals(name))
1017	>	continue;
1018	>	if ("Reference Handler".equals(name)
1019	>	&& (lockName = info.getLockName()) != null
1020	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1021	>	continue;
1022	>	if ("Finalizer".equals(name)
1023	>	&& (lockName = info.getLockName()) != null
1024	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1025	>	continue;
1026	>	if ("checkForWedgedTest".equals(name))
1027	>	continue;
1028	>	System.err.print(info);
1029	>	}
1030	>	System.err.println("------ stacktrace dump end ------");
1031	>
1032	>	if (sm != null) System.setSecurityManager(sm);
1033	>	}
1034	>
1035	>	/**
1036	>	* Checks that thread does not terminate within the default
1037	>	* millisecond delay of {@code timeoutMillis()}.
1038	>	*/
1039	>	void assertThreadStaysAlive(Thread thread) {
1040	>	assertThreadStaysAlive(thread, timeoutMillis());
1041	>	}
1042	>
1043	>	/**
1044	>	* Checks that thread does not terminate within the given millisecond delay.
1045	>	*/
1046	>	void assertThreadStaysAlive(Thread thread, long millis) {
1047	>	try {
1048	>	// No need to optimize the failing case via Thread.join.
1049	>	delay(millis);
1050	>	assertTrue(thread.isAlive());
1051	>	} catch (InterruptedException fail) {
1052	>	threadFail("Unexpected InterruptedException");
1053	>	}
1054	>	}
1055	>
1056	>	/**
1057	>	* Checks that the threads do not terminate within the default
1058	>	* millisecond delay of {@code timeoutMillis()}.
1059	>	*/
1060	>	void assertThreadsStayAlive(Thread... threads) {
1061	>	assertThreadsStayAlive(timeoutMillis(), threads);
1062	>	}
1063	>
1064	>	/**
1065	>	* Checks that the threads do not terminate within the given millisecond delay.
1066	>	*/
1067	>	void assertThreadsStayAlive(long millis, Thread... threads) {
1068	>	try {
1069	>	// No need to optimize the failing case via Thread.join.
1070	>	delay(millis);
1071	>	for (Thread thread : threads)
1072	>	assertTrue(thread.isAlive());
1073	>	} catch (InterruptedException fail) {
1074	>	threadFail("Unexpected InterruptedException");
1075		}
1076		}
1077
1078	+	/**
1079	+	* Checks that future.get times out, with the default timeout of
1080	+	* {@code timeoutMillis()}.
1081	+	*/
1082	+	void assertFutureTimesOut(Future future) {
1083	+	assertFutureTimesOut(future, timeoutMillis());
1084	+	}
1085	+
1086	+	/**
1087	+	* Checks that future.get times out, with the given millisecond timeout.
1088	+	*/
1089	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
1090	+	long startTime = System.nanoTime();
1091	+	try {
1092	+	future.get(timeoutMillis, MILLISECONDS);
1093	+	shouldThrow();
1094	+	} catch (TimeoutException success) {
1095	+	} catch (Exception fail) {
1096	+	threadUnexpectedException(fail);
1097	+	} finally { future.cancel(true); }
1098	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1099	+	}
1100
1101		/**
1102		* Fails with message "should throw exception".
#	Line 416 | Line 1113 | public class JSR166TestCase extends Test
1113		}
1114
1115		/**
419	–	* Fails with message "Unexpected exception: " + ex.
420	–	*/
421	–	public void unexpectedException(Throwable ex) {
422	–	ex.printStackTrace();
423	–	fail("Unexpected exception: " + ex);
424	–	}
425	–
426	–
427	–	/**
1116		* The number of elements to place in collections, arrays, etc.
1117		*/
1118		public static final int SIZE = 20;
#	Line 449 | Line 1137 | public class JSR166TestCase extends Test
1137		public static final Integer m6  = new Integer(-6);
1138		public static final Integer m10 = new Integer(-10);
1139
452	–
1140		/**
1141		* Runs Runnable r with a security policy that permits precisely
1142		* the specified permissions.  If there is no current security
#	Line 461 | Line 1148 | public class JSR166TestCase extends Test
1148		SecurityManager sm = System.getSecurityManager();
1149		if (sm == null) {
1150		r.run();
1151	+	}
1152	+	runWithSecurityManagerWithPermissions(r, permissions);
1153	+	}
1154	+
1155	+	/**
1156	+	* Runs Runnable r with a security policy that permits precisely
1157	+	* the specified permissions.  If there is no current security
1158	+	* manager, a temporary one is set for the duration of the
1159	+	* Runnable.  We require that any security manager permit
1160	+	* getPolicy/setPolicy.
1161	+	*/
1162	+	public void runWithSecurityManagerWithPermissions(Runnable r,
1163	+	Permission... permissions) {
1164	+	SecurityManager sm = System.getSecurityManager();
1165	+	if (sm == null) {
1166		Policy savedPolicy = Policy.getPolicy();
1167		try {
1168		Policy.setPolicy(permissivePolicy());
1169		System.setSecurityManager(new SecurityManager());
1170	<	runWithPermissions(r, permissions);
1170	>	runWithSecurityManagerWithPermissions(r, permissions);
1171		} finally {
1172		System.setSecurityManager(null);
1173		Policy.setPolicy(savedPolicy);
#	Line 513 | Line 1215 | public class JSR166TestCase extends Test
1215		return perms.implies(p);
1216		}
1217		public void refresh() {}
1218	+	public String toString() {
1219	+	List<Permission> ps = new ArrayList<Permission>();
1220	+	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1221	+	ps.add(e.nextElement());
1222	+	return "AdjustablePolicy with permissions " + ps;
1223	+	}
1224		}
1225
1226		/**
#	Line 535 | Line 1243 | public class JSR166TestCase extends Test
1243		}
1244
1245		/**
1246	<	* Sleep until the timeout has elapsed, or interrupted.
1247	<	* Does <em>NOT</em> throw InterruptedException.
1246	>	* Sleeps until the given time has elapsed.
1247	>	* Throws AssertionFailedError if interrupted.
1248	>	*/
1249	>	static void sleep(long millis) {
1250	>	try {
1251	>	delay(millis);
1252	>	} catch (InterruptedException fail) {
1253	>	AssertionFailedError afe =
1254	>	new AssertionFailedError("Unexpected InterruptedException");
1255	>	afe.initCause(fail);
1256	>	throw afe;
1257	>	}
1258	>	}
1259	>
1260	>	/**
1261	>	* Spin-waits up to the specified number of milliseconds for the given
1262	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1263	>	*/
1264	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1265	>	long startTime = 0L;
1266	>	for (;;) {
1267	>	Thread.State s = thread.getState();
1268	>	if (s == Thread.State.BLOCKED ||
1269	>	s == Thread.State.WAITING ||
1270	>	s == Thread.State.TIMED_WAITING)
1271	>	return;
1272	>	else if (s == Thread.State.TERMINATED)
1273	>	fail("Unexpected thread termination");
1274	>	else if (startTime == 0L)
1275	>	startTime = System.nanoTime();
1276	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1277	>	threadAssertTrue(thread.isAlive());
1278	>	return;
1279	>	}
1280	>	Thread.yield();
1281	>	}
1282	>	}
1283	>
1284	>	/**
1285	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1286	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1287	>	*/
1288	>	void waitForThreadToEnterWaitState(Thread thread) {
1289	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1290	>	}
1291	>
1292	>	/**
1293	>	* Returns the number of milliseconds since time given by
1294	>	* startNanoTime, which must have been previously returned from a
1295	>	* call to {@link System#nanoTime()}.
1296		*/
1297	<	void sleepTillInterrupted(long timeoutMillis) {
1297	>	static long millisElapsedSince(long startNanoTime) {
1298	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1299	>	}
1300	>
1301	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1302	>	//         long startTime = System.nanoTime();
1303	>	//         try {
1304	>	//             r.run();
1305	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1306	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1307	>	//             throw new AssertionFailedError("did not return promptly");
1308	>	//     }
1309	>
1310	>	//     void assertTerminatesPromptly(Runnable r) {
1311	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1312	>	//     }
1313	>
1314	>	/**
1315	>	* Checks that timed f.get() returns the expected value, and does not
1316	>	* wait for the timeout to elapse before returning.
1317	>	*/
1318	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1319	>	long startTime = System.nanoTime();
1320		try {
1321	<	Thread.sleep(timeoutMillis);
1322	<	} catch (InterruptedException wakeup) {}
1321	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1322	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1323	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1324	>	throw new AssertionFailedError("timed get did not return promptly");
1325	>	}
1326	>
1327	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1328	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1329		}
1330
1331		/**
1332	<	* Returns a new started Thread running the given runnable.
1332	>	* Returns a new started daemon Thread running the given runnable.
1333		*/
1334		Thread newStartedThread(Runnable runnable) {
1335		Thread t = new Thread(runnable);
1336	+	t.setDaemon(true);
1337		t.start();
1338		return t;
1339		}
1340
1341	+	/**
1342	+	* Waits for the specified time (in milliseconds) for the thread
1343	+	* to terminate (using {@link Thread#join(long)}), else interrupts
1344	+	* the thread (in the hope that it may terminate later) and fails.
1345	+	*/
1346	+	void awaitTermination(Thread t, long timeoutMillis) {
1347	+	try {
1348	+	t.join(timeoutMillis);
1349	+	} catch (InterruptedException fail) {
1350	+	threadUnexpectedException(fail);
1351	+	} finally {
1352	+	if (t.getState() != Thread.State.TERMINATED) {
1353	+	t.interrupt();
1354	+	threadFail("timed out waiting for thread to terminate");
1355	+	}
1356	+	}
1357	+	}
1358	+
1359	+	/**
1360	+	* Waits for LONG_DELAY_MS milliseconds for the thread to
1361	+	* terminate (using {@link Thread#join(long)}), else interrupts
1362	+	* the thread (in the hope that it may terminate later) and fails.
1363	+	*/
1364	+	void awaitTermination(Thread t) {
1365	+	awaitTermination(t, LONG_DELAY_MS);
1366	+	}
1367	+
1368		// Some convenient Runnable classes
1369
1370		public abstract class CheckedRunnable implements Runnable {
#	Line 561 | Line 1373 | public class JSR166TestCase extends Test
1373		public final void run() {
1374		try {
1375		realRun();
1376	<	} catch (Throwable t) {
1377	<	threadUnexpectedException(t);
1376	>	} catch (Throwable fail) {
1377	>	threadUnexpectedException(fail);
1378		}
1379		}
1380		}
#	Line 615 | Line 1427 | public class JSR166TestCase extends Test
1427		realRun();
1428		threadShouldThrow("InterruptedException");
1429		} catch (InterruptedException success) {
1430	<	} catch (Throwable t) {
1431	<	threadUnexpectedException(t);
1430	>	threadAssertFalse(Thread.interrupted());
1431	>	} catch (Throwable fail) {
1432	>	threadUnexpectedException(fail);
1433		}
1434		}
1435		}
#	Line 627 | Line 1440 | public class JSR166TestCase extends Test
1440		public final T call() {
1441		try {
1442		return realCall();
1443	<	} catch (Throwable t) {
1444	<	threadUnexpectedException(t);
1443	>	} catch (Throwable fail) {
1444	>	threadUnexpectedException(fail);
1445		return null;
1446		}
1447		}
#	Line 644 | Line 1457 | public class JSR166TestCase extends Test
1457		threadShouldThrow("InterruptedException");
1458		return result;
1459		} catch (InterruptedException success) {
1460	<	} catch (Throwable t) {
1461	<	threadUnexpectedException(t);
1460	>	threadAssertFalse(Thread.interrupted());
1461	>	} catch (Throwable fail) {
1462	>	threadUnexpectedException(fail);
1463		}
1464		return null;
1465		}
#	Line 662 | Line 1476 | public class JSR166TestCase extends Test
1476		public static final String TEST_STRING = "a test string";
1477
1478		public static class StringTask implements Callable<String> {
1479	<	public String call() { return TEST_STRING; }
1479	>	final String value;
1480	>	public StringTask() { this(TEST_STRING); }
1481	>	public StringTask(String value) { this.value = value; }
1482	>	public String call() { return value; }
1483		}
1484
1485		public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1486		return new CheckedCallable<String>() {
1487	<	public String realCall() {
1487	>	protected String realCall() {
1488		try {
1489		latch.await();
1490		} catch (InterruptedException quittingTime) {}
#	Line 675 | Line 1492 | public class JSR166TestCase extends Test
1492		}};
1493		}
1494
1495	+	public Runnable countDowner(final CountDownLatch latch) {
1496	+	return new CheckedRunnable() {
1497	+	public void realRun() throws InterruptedException {
1498	+	latch.countDown();
1499	+	}};
1500	+	}
1501	+
1502	+	class LatchAwaiter extends CheckedRunnable {
1503	+	static final int NEW = 0;
1504	+	static final int RUNNING = 1;
1505	+	static final int DONE = 2;
1506	+	final CountDownLatch latch;
1507	+	int state = NEW;
1508	+	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1509	+	public void realRun() throws InterruptedException {
1510	+	state = 1;
1511	+	await(latch);
1512	+	state = 2;
1513	+	}
1514	+	}
1515	+
1516	+	public LatchAwaiter awaiter(CountDownLatch latch) {
1517	+	return new LatchAwaiter(latch);
1518	+	}
1519	+
1520	+	public void await(CountDownLatch latch, long timeoutMillis) {
1521	+	try {
1522	+	if (!latch.await(timeoutMillis, MILLISECONDS))
1523	+	fail("timed out waiting for CountDownLatch for "
1524	+	+ (timeoutMillis/1000) + " sec");
1525	+	} catch (Throwable fail) {
1526	+	threadUnexpectedException(fail);
1527	+	}
1528	+	}
1529	+
1530	+	public void await(CountDownLatch latch) {
1531	+	await(latch, LONG_DELAY_MS);
1532	+	}
1533	+
1534	+	public void await(Semaphore semaphore) {
1535	+	try {
1536	+	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1537	+	fail("timed out waiting for Semaphore for "
1538	+	+ (LONG_DELAY_MS/1000) + " sec");
1539	+	} catch (Throwable fail) {
1540	+	threadUnexpectedException(fail);
1541	+	}
1542	+	}
1543	+
1544	+	//     /**
1545	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1546	+	//      */
1547	+	//     public void await(AtomicBoolean flag) {
1548	+	//         await(flag, LONG_DELAY_MS);
1549	+	//     }
1550	+
1551	+	//     /**
1552	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1553	+	//      */
1554	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1555	+	//         long startTime = System.nanoTime();
1556	+	//         while (!flag.get()) {
1557	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1558	+	//                 throw new AssertionFailedError("timed out");
1559	+	//             Thread.yield();
1560	+	//         }
1561	+	//     }
1562	+
1563		public static class NPETask implements Callable<String> {
1564		public String call() { throw new NullPointerException(); }
1565		}
#	Line 685 | Line 1570 | public class JSR166TestCase extends Test
1570
1571		public class ShortRunnable extends CheckedRunnable {
1572		protected void realRun() throws Throwable {
1573	<	Thread.sleep(SHORT_DELAY_MS);
1573	>	delay(SHORT_DELAY_MS);
1574		}
1575		}
1576
1577		public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1578		protected void realRun() throws InterruptedException {
1579	<	Thread.sleep(SHORT_DELAY_MS);
1579	>	delay(SHORT_DELAY_MS);
1580		}
1581		}
1582
1583		public class SmallRunnable extends CheckedRunnable {
1584		protected void realRun() throws Throwable {
1585	<	Thread.sleep(SMALL_DELAY_MS);
1585	>	delay(SMALL_DELAY_MS);
1586		}
1587		}
1588
1589		public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1590		protected void realRun() {
1591		try {
1592	<	Thread.sleep(SMALL_DELAY_MS);
1592	>	delay(SMALL_DELAY_MS);
1593		} catch (InterruptedException ok) {}
1594		}
1595		}
1596
1597		public class SmallCallable extends CheckedCallable {
1598		protected Object realCall() throws InterruptedException {
1599	<	Thread.sleep(SMALL_DELAY_MS);
1599	>	delay(SMALL_DELAY_MS);
1600		return Boolean.TRUE;
1601		}
1602		}
1603
719	–	public class SmallInterruptedRunnable extends CheckedInterruptedRunnable {
720	–	protected void realRun() throws InterruptedException {
721	–	Thread.sleep(SMALL_DELAY_MS);
722	–	}
723	–	}
724	–
1604		public class MediumRunnable extends CheckedRunnable {
1605		protected void realRun() throws Throwable {
1606	<	Thread.sleep(MEDIUM_DELAY_MS);
1606	>	delay(MEDIUM_DELAY_MS);
1607		}
1608		}
1609
1610		public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1611		protected void realRun() throws InterruptedException {
1612	<	Thread.sleep(MEDIUM_DELAY_MS);
1612	>	delay(MEDIUM_DELAY_MS);
1613		}
1614		}
1615
1616	+	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1617	+	return new CheckedRunnable() {
1618	+	protected void realRun() {
1619	+	try {
1620	+	delay(timeoutMillis);
1621	+	} catch (InterruptedException ok) {}
1622	+	}};
1623	+	}
1624	+
1625		public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1626		protected void realRun() {
1627		try {
1628	<	Thread.sleep(MEDIUM_DELAY_MS);
1628	>	delay(MEDIUM_DELAY_MS);
1629		} catch (InterruptedException ok) {}
1630		}
1631		}
#	Line 745 | Line 1633 | public class JSR166TestCase extends Test
1633		public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1634		protected void realRun() {
1635		try {
1636	<	Thread.sleep(LONG_DELAY_MS);
1636	>	delay(LONG_DELAY_MS);
1637		} catch (InterruptedException ok) {}
1638		}
1639		}
#	Line 759 | Line 1647 | public class JSR166TestCase extends Test
1647		}
1648		}
1649
1650	+	public interface TrackedRunnable extends Runnable {
1651	+	boolean isDone();
1652	+	}
1653	+
1654	+	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1655	+	return new TrackedRunnable() {
1656	+	private volatile boolean done = false;
1657	+	public boolean isDone() { return done; }
1658	+	public void run() {
1659	+	try {
1660	+	delay(timeoutMillis);
1661	+	done = true;
1662	+	} catch (InterruptedException ok) {}
1663	+	}
1664	+	};
1665	+	}
1666	+
1667		public static class TrackedShortRunnable implements Runnable {
1668		public volatile boolean done = false;
1669		public void run() {
1670		try {
1671	<	Thread.sleep(SMALL_DELAY_MS);
1671	>	delay(SHORT_DELAY_MS);
1672	>	done = true;
1673	>	} catch (InterruptedException ok) {}
1674	>	}
1675	>	}
1676	>
1677	>	public static class TrackedSmallRunnable implements Runnable {
1678	>	public volatile boolean done = false;
1679	>	public void run() {
1680	>	try {
1681	>	delay(SMALL_DELAY_MS);
1682		done = true;
1683		} catch (InterruptedException ok) {}
1684		}
#	Line 773 | Line 1688 | public class JSR166TestCase extends Test
1688		public volatile boolean done = false;
1689		public void run() {
1690		try {
1691	<	Thread.sleep(MEDIUM_DELAY_MS);
1691	>	delay(MEDIUM_DELAY_MS);
1692		done = true;
1693		} catch (InterruptedException ok) {}
1694		}
#	Line 783 | Line 1698 | public class JSR166TestCase extends Test
1698		public volatile boolean done = false;
1699		public void run() {
1700		try {
1701	<	Thread.sleep(LONG_DELAY_MS);
1701	>	delay(LONG_DELAY_MS);
1702		done = true;
1703		} catch (InterruptedException ok) {}
1704		}
#	Line 800 | Line 1715 | public class JSR166TestCase extends Test
1715		public volatile boolean done = false;
1716		public Object call() {
1717		try {
1718	<	Thread.sleep(SMALL_DELAY_MS);
1718	>	delay(SMALL_DELAY_MS);
1719		done = true;
1720		} catch (InterruptedException ok) {}
1721		return Boolean.TRUE;
#	Line 813 | Line 1728 | public class JSR166TestCase extends Test
1728		public abstract class CheckedRecursiveAction extends RecursiveAction {
1729		protected abstract void realCompute() throws Throwable;
1730
1731	<	public final void compute() {
1731	>	@Override protected final void compute() {
1732		try {
1733		realCompute();
1734	<	} catch (Throwable t) {
1735	<	threadUnexpectedException(t);
1734	>	} catch (Throwable fail) {
1735	>	threadUnexpectedException(fail);
1736		}
1737		}
1738		}
#	Line 828 | Line 1743 | public class JSR166TestCase extends Test
1743		public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1744		protected abstract T realCompute() throws Throwable;
1745
1746	<	public final T compute() {
1746	>	@Override protected final T compute() {
1747		try {
1748		return realCompute();
1749	<	} catch (Throwable t) {
1750	<	threadUnexpectedException(t);
1749	>	} catch (Throwable fail) {
1750	>	threadUnexpectedException(fail);
1751		return null;
1752		}
1753		}
#	Line 846 | Line 1761 | public class JSR166TestCase extends Test
1761		ThreadPoolExecutor executor) {}
1762		}
1763
1764	+	/**
1765	+	* A CyclicBarrier that uses timed await and fails with
1766	+	* AssertionFailedErrors instead of throwing checked exceptions.
1767	+	*/
1768	+	public static class CheckedBarrier extends CyclicBarrier {
1769	+	public CheckedBarrier(int parties) { super(parties); }
1770	+
1771	+	public int await() {
1772	+	try {
1773	+	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1774	+	} catch (TimeoutException timedOut) {
1775	+	throw new AssertionFailedError("timed out");
1776	+	} catch (Exception fail) {
1777	+	AssertionFailedError afe =
1778	+	new AssertionFailedError("Unexpected exception: " + fail);
1779	+	afe.initCause(fail);
1780	+	throw afe;
1781	+	}
1782	+	}
1783	+	}
1784	+
1785	+	void checkEmpty(BlockingQueue q) {
1786	+	try {
1787	+	assertTrue(q.isEmpty());
1788	+	assertEquals(0, q.size());
1789	+	assertNull(q.peek());
1790	+	assertNull(q.poll());
1791	+	assertNull(q.poll(0, MILLISECONDS));
1792	+	assertEquals(q.toString(), "[]");
1793	+	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1794	+	assertFalse(q.iterator().hasNext());
1795	+	try {
1796	+	q.element();
1797	+	shouldThrow();
1798	+	} catch (NoSuchElementException success) {}
1799	+	try {
1800	+	q.iterator().next();
1801	+	shouldThrow();
1802	+	} catch (NoSuchElementException success) {}
1803	+	try {
1804	+	q.remove();
1805	+	shouldThrow();
1806	+	} catch (NoSuchElementException success) {}
1807	+	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1808	+	}
1809	+
1810	+	void assertSerialEquals(Object x, Object y) {
1811	+	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1812	+	}
1813	+
1814	+	void assertNotSerialEquals(Object x, Object y) {
1815	+	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1816	+	}
1817	+
1818	+	byte[] serialBytes(Object o) {
1819	+	try {
1820	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1821	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1822	+	oos.writeObject(o);
1823	+	oos.flush();
1824	+	oos.close();
1825	+	return bos.toByteArray();
1826	+	} catch (Throwable fail) {
1827	+	threadUnexpectedException(fail);
1828	+	return new byte[0];
1829	+	}
1830	+	}
1831	+
1832	+	void assertImmutable(final Object o) {
1833	+	if (o instanceof Collection) {
1834	+	assertThrows(
1835	+	UnsupportedOperationException.class,
1836	+	new Runnable() { public void run() {
1837	+	((Collection) o).add(null);}});
1838	+	}
1839	+	}
1840	+
1841	+	@SuppressWarnings("unchecked")
1842	+	<T> T serialClone(T o) {
1843	+	try {
1844	+	ObjectInputStream ois = new ObjectInputStream
1845	+	(new ByteArrayInputStream(serialBytes(o)));
1846	+	T clone = (T) ois.readObject();
1847	+	if (o == clone) assertImmutable(o);
1848	+	assertSame(o.getClass(), clone.getClass());
1849	+	return clone;
1850	+	} catch (Throwable fail) {
1851	+	threadUnexpectedException(fail);
1852	+	return null;
1853	+	}
1854	+	}
1855	+
1856	+	/**
1857	+	* A version of serialClone that leaves error handling (for
1858	+	* e.g. NotSerializableException) up to the caller.
1859	+	*/
1860	+	@SuppressWarnings("unchecked")
1861	+	<T> T serialClonePossiblyFailing(T o)
1862	+	throws ReflectiveOperationException, java.io.IOException {
1863	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1864	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1865	+	oos.writeObject(o);
1866	+	oos.flush();
1867	+	oos.close();
1868	+	ObjectInputStream ois = new ObjectInputStream
1869	+	(new ByteArrayInputStream(bos.toByteArray()));
1870	+	T clone = (T) ois.readObject();
1871	+	if (o == clone) assertImmutable(o);
1872	+	assertSame(o.getClass(), clone.getClass());
1873	+	return clone;
1874	+	}
1875	+
1876	+	/**
1877	+	* If o implements Cloneable and has a public clone method,
1878	+	* returns a clone of o, else null.
1879	+	*/
1880	+	@SuppressWarnings("unchecked")
1881	+	<T> T cloneableClone(T o) {
1882	+	if (!(o instanceof Cloneable)) return null;
1883	+	final T clone;
1884	+	try {
1885	+	clone = (T) o.getClass().getMethod("clone").invoke(o);
1886	+	} catch (NoSuchMethodException ok) {
1887	+	return null;
1888	+	} catch (ReflectiveOperationException unexpected) {
1889	+	throw new Error(unexpected);
1890	+	}
1891	+	assertNotSame(o, clone); // not 100% guaranteed by spec
1892	+	assertSame(o.getClass(), clone.getClass());
1893	+	return clone;
1894	+	}
1895	+
1896	+	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1897	+	Runnable... throwingActions) {
1898	+	for (Runnable throwingAction : throwingActions) {
1899	+	boolean threw = false;
1900	+	try { throwingAction.run(); }
1901	+	catch (Throwable t) {
1902	+	threw = true;
1903	+	if (!expectedExceptionClass.isInstance(t)) {
1904	+	AssertionFailedError afe =
1905	+	new AssertionFailedError
1906	+	("Expected " + expectedExceptionClass.getName() +
1907	+	", got " + t.getClass().getName());
1908	+	afe.initCause(t);
1909	+	threadUnexpectedException(afe);
1910	+	}
1911	+	}
1912	+	if (!threw)
1913	+	shouldThrow(expectedExceptionClass.getName());
1914	+	}
1915	+	}
1916	+
1917	+	public void assertIteratorExhausted(Iterator<?> it) {
1918	+	try {
1919	+	it.next();
1920	+	shouldThrow();
1921	+	} catch (NoSuchElementException success) {}
1922	+	assertFalse(it.hasNext());
1923	+	}
1924	+
1925	+	public <T> Callable<T> callableThrowing(final Exception ex) {
1926	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1927	+	}
1928	+
1929	+	public Runnable runnableThrowing(final RuntimeException ex) {
1930	+	return new Runnable() { public void run() { throw ex; }};
1931	+	}
1932	+
1933	+	/** A reusable thread pool to be shared by tests. */
1934	+	static final ExecutorService cachedThreadPool =
1935	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1936	+	1000L, MILLISECONDS,
1937	+	new SynchronousQueue<Runnable>());
1938	+
1939	+	static <T> void shuffle(T[] array) {
1940	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1941	+	}
1942		}

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