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Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.58 by jsr166, Wed Oct 6 02:11:57 2010 UTC vs.
Revision 1.230 by jsr166, Mon May 15 16:21:07 2017 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by Doug Lea with assistance from members of JCP JSR-166
3	<	* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
2	>	* Written by Doug Lea and Martin Buchholz with assistance from
3	>	* members of JCP JSR-166 Expert Group and released to the public
4	>	* domain, as explained at
5	>	* http://creativecommons.org/publicdomain/zero/1.0/
6		* Other contributors include Andrew Wright, Jeffrey Hayes,
7		* Pat Fisher, Mike Judd.
8		*/
9
10	<	import junit.framework.*;
11	<	import java.util.PropertyPermission;
12	<	import java.util.concurrent.*;
13	<	import java.util.concurrent.atomic.AtomicReference;
10	>	/*
11	>	* @test
12	>	* @summary JSR-166 tck tests, in a number of variations.
13	>	*          The first is the conformance testing variant,
14	>	*          while others also test implementation details.
15	>	* @build *
16	>	* @modules java.management
17	>	* @run junit/othervm/timeout=1000 JSR166TestCase
18	>	* @run junit/othervm/timeout=1000
19	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
20	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
21	>	*      -Djsr166.testImplementationDetails=true
22	>	*      JSR166TestCase
23	>	* @run junit/othervm/timeout=1000
24	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
25	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
26	>	*      -Djsr166.testImplementationDetails=true
27	>	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=0
28	>	*      JSR166TestCase
29	>	* @run junit/othervm/timeout=1000
30	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
31	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
32	>	*      -Djsr166.testImplementationDetails=true
33	>	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=1
34	>	*      -Djava.util.secureRandomSeed=true
35	>	*      JSR166TestCase
36	>	* @run junit/othervm/timeout=1000/policy=tck.policy
37	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
38	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
39	>	*      -Djsr166.testImplementationDetails=true
40	>	*      JSR166TestCase
41	>	*/
42	>
43		import static java.util.concurrent.TimeUnit.MILLISECONDS;
44	+	import static java.util.concurrent.TimeUnit.MINUTES;
45	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
46	+
47	+	import java.io.ByteArrayInputStream;
48	+	import java.io.ByteArrayOutputStream;
49	+	import java.io.ObjectInputStream;
50	+	import java.io.ObjectOutputStream;
51	+	import java.lang.management.ManagementFactory;
52	+	import java.lang.management.ThreadInfo;
53	+	import java.lang.management.ThreadMXBean;
54	+	import java.lang.reflect.Constructor;
55	+	import java.lang.reflect.Method;
56	+	import java.lang.reflect.Modifier;
57		import java.security.CodeSource;
58		import java.security.Permission;
59		import java.security.PermissionCollection;
#	Line 18 | Line 61 | import java.security.Permissions;
61		import java.security.Policy;
62		import java.security.ProtectionDomain;
63		import java.security.SecurityPermission;
64	+	import java.util.ArrayList;
65	+	import java.util.Arrays;
66	+	import java.util.Collection;
67	+	import java.util.Collections;
68	+	import java.util.Date;
69	+	import java.util.Enumeration;
70	+	import java.util.Iterator;
71	+	import java.util.List;
72	+	import java.util.NoSuchElementException;
73	+	import java.util.PropertyPermission;
74	+	import java.util.concurrent.BlockingQueue;
75	+	import java.util.concurrent.Callable;
76	+	import java.util.concurrent.CountDownLatch;
77	+	import java.util.concurrent.CyclicBarrier;
78	+	import java.util.concurrent.ExecutionException;
79	+	import java.util.concurrent.Executors;
80	+	import java.util.concurrent.ExecutorService;
81	+	import java.util.concurrent.ForkJoinPool;
82	+	import java.util.concurrent.Future;
83	+	import java.util.concurrent.RecursiveAction;
84	+	import java.util.concurrent.RecursiveTask;
85	+	import java.util.concurrent.RejectedExecutionHandler;
86	+	import java.util.concurrent.Semaphore;
87	+	import java.util.concurrent.SynchronousQueue;
88	+	import java.util.concurrent.ThreadFactory;
89	+	import java.util.concurrent.ThreadLocalRandom;
90	+	import java.util.concurrent.ThreadPoolExecutor;
91	+	import java.util.concurrent.TimeoutException;
92	+	import java.util.concurrent.atomic.AtomicBoolean;
93	+	import java.util.concurrent.atomic.AtomicReference;
94	+	import java.util.regex.Pattern;
95	+
96	+	import junit.framework.AssertionFailedError;
97	+	import junit.framework.Test;
98	+	import junit.framework.TestCase;
99	+	import junit.framework.TestResult;
100	+	import junit.framework.TestSuite;
101
102		/**
103		* Base class for JSR166 Junit TCK tests.  Defines some constants,
#	Line 29 | Line 109 | import java.security.SecurityPermission;
109		*
110		* <ol>
111		*
112	<	* <li> All assertions in code running in generated threads must use
112	>	* <li>All assertions in code running in generated threads must use
113		* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
114		* #threadAssertEquals}, or {@link #threadAssertNull}, (not
115		* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
116		* particularly recommended) for other code to use these forms too.
117		* Only the most typically used JUnit assertion methods are defined
118	<	* this way, but enough to live with.</li>
118	>	* this way, but enough to live with.
119		*
120	<	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
120	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
121		* to invoke {@code super.setUp} and {@code super.tearDown} within
122		* them. These methods are used to clear and check for thread
123	<	* assertion failures.</li>
123	>	* assertion failures.
124		*
125		* <li>All delays and timeouts must use one of the constants {@code
126		* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
#	Line 51 | Line 131 | import java.security.SecurityPermission;
131		* is always discriminable as larger than SHORT and smaller than
132		* MEDIUM.  And so on. These constants are set to conservative values,
133		* but even so, if there is ever any doubt, they can all be increased
134	<	* in one spot to rerun tests on slower platforms.</li>
134	>	* in one spot to rerun tests on slower platforms.
135		*
136	<	* <li> All threads generated must be joined inside each test case
136	>	* <li>All threads generated must be joined inside each test case
137		* method (or {@code fail} to do so) before returning from the
138		* method. The {@code joinPool} method can be used to do this when
139	<	* using Executors.</li>
139	>	* using Executors.
140		*
141		* </ol>
142		*
143	<	* <p> <b>Other notes</b>
143	>	* <p><b>Other notes</b>
144		* <ul>
145		*
146	<	* <li> Usually, there is one testcase method per JSR166 method
146	>	* <li>Usually, there is one testcase method per JSR166 method
147		* covering "normal" operation, and then as many exception-testing
148		* methods as there are exceptions the method can throw. Sometimes
149		* there are multiple tests per JSR166 method when the different
150		* "normal" behaviors differ significantly. And sometimes testcases
151	<	* cover multiple methods when they cannot be tested in
72	<	* isolation.</li>
151	>	* cover multiple methods when they cannot be tested in isolation.
152		*
153	<	* <li> The documentation style for testcases is to provide as javadoc
153	>	* <li>The documentation style for testcases is to provide as javadoc
154		* a simple sentence or two describing the property that the testcase
155		* method purports to test. The javadocs do not say anything about how
156	<	* the property is tested. To find out, read the code.</li>
156	>	* the property is tested. To find out, read the code.
157		*
158	<	* <li> These tests are "conformance tests", and do not attempt to
158	>	* <li>These tests are "conformance tests", and do not attempt to
159		* test throughput, latency, scalability or other performance factors
160		* (see the separate "jtreg" tests for a set intended to check these
161		* for the most central aspects of functionality.) So, most tests use
162		* the smallest sensible numbers of threads, collection sizes, etc
163	<	* needed to check basic conformance.</li>
163	>	* needed to check basic conformance.
164		*
165		* <li>The test classes currently do not declare inclusion in
166		* any particular package to simplify things for people integrating
167	<	* them in TCK test suites.</li>
167	>	* them in TCK test suites.
168		*
169	<	* <li> As a convenience, the {@code main} of this class (JSR166TestCase)
170	<	* runs all JSR166 unit tests.</li>
169	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
170	>	* runs all JSR166 unit tests.
171		*
172		* </ul>
173		*/
#	Line 96 | Line 175 | public class JSR166TestCase extends Test
175		private static final boolean useSecurityManager =
176		Boolean.getBoolean("jsr166.useSecurityManager");
177
178	+	protected static final boolean expensiveTests =
179	+	Boolean.getBoolean("jsr166.expensiveTests");
180	+
181	+	/**
182	+	* If true, also run tests that are not part of the official tck
183	+	* because they test unspecified implementation details.
184	+	*/
185	+	protected static final boolean testImplementationDetails =
186	+	Boolean.getBoolean("jsr166.testImplementationDetails");
187	+
188	+	/**
189	+	* If true, report on stdout all "slow" tests, that is, ones that
190	+	* take more than profileThreshold milliseconds to execute.
191	+	*/
192	+	private static final boolean profileTests =
193	+	Boolean.getBoolean("jsr166.profileTests");
194	+
195	+	/**
196	+	* The number of milliseconds that tests are permitted for
197	+	* execution without being reported, when profileTests is set.
198	+	*/
199	+	private static final long profileThreshold =
200	+	Long.getLong("jsr166.profileThreshold", 100);
201	+
202	+	/**
203	+	* The number of repetitions per test (for tickling rare bugs).
204	+	*/
205	+	private static final int runsPerTest =
206	+	Integer.getInteger("jsr166.runsPerTest", 1);
207	+
208		/**
209	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
209	>	* The number of repetitions of the test suite (for finding leaks?).
210	>	*/
211	>	private static final int suiteRuns =
212	>	Integer.getInteger("jsr166.suiteRuns", 1);
213	>
214	>	/**
215	>	* Returns the value of the system property, or NaN if not defined.
216	>	*/
217	>	private static float systemPropertyValue(String name) {
218	>	String floatString = System.getProperty(name);
219	>	if (floatString == null)
220	>	return Float.NaN;
221	>	try {
222	>	return Float.parseFloat(floatString);
223	>	} catch (NumberFormatException ex) {
224	>	throw new IllegalArgumentException(
225	>	String.format("Bad float value in system property %s=%s",
226	>	name, floatString));
227	>	}
228	>	}
229	>
230	>	/**
231	>	* The scaling factor to apply to standard delays used in tests.
232	>	* May be initialized from any of:
233	>	* - the "jsr166.delay.factor" system property
234	>	* - the "test.timeout.factor" system property (as used by jtreg)
235	>	*   See: http://openjdk.java.net/jtreg/tag-spec.html
236	>	* - hard-coded fuzz factor when using a known slowpoke VM
237	>	*/
238	>	private static final float delayFactor = delayFactor();
239	>
240	>	private static float delayFactor() {
241	>	float x;
242	>	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
243	>	return x;
244	>	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
245	>	return x;
246	>	String prop = System.getProperty("java.vm.version");
247	>	if (prop != null && prop.matches(".*debug.*"))
248	>	return 4.0f; // How much slower is fastdebug than product?!
249	>	return 1.0f;
250	>	}
251	>
252	>	public JSR166TestCase() { super(); }
253	>	public JSR166TestCase(String name) { super(name); }
254	>
255	>	/**
256	>	* A filter for tests to run, matching strings of the form
257	>	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
258	>	* Usefully combined with jsr166.runsPerTest.
259	>	*/
260	>	private static final Pattern methodFilter = methodFilter();
261	>
262	>	private static Pattern methodFilter() {
263	>	String regex = System.getProperty("jsr166.methodFilter");
264	>	return (regex == null) ? null : Pattern.compile(regex);
265	>	}
266	>
267	>	// Instrumentation to debug very rare, but very annoying hung test runs.
268	>	static volatile TestCase currentTestCase;
269	>	// static volatile int currentRun = 0;
270	>	static {
271	>	Runnable checkForWedgedTest = new Runnable() { public void run() {
272	>	// Avoid spurious reports with enormous runsPerTest.
273	>	// A single test case run should never take more than 1 second.
274	>	// But let's cap it at the high end too ...
275	>	final int timeoutMinutes =
276	>	Math.min(15, Math.max(runsPerTest / 60, 1));
277	>	for (TestCase lastTestCase = currentTestCase;;) {
278	>	try { MINUTES.sleep(timeoutMinutes); }
279	>	catch (InterruptedException unexpected) { break; }
280	>	if (lastTestCase == currentTestCase) {
281	>	System.err.printf(
282	>	"Looks like we're stuck running test: %s%n",
283	>	lastTestCase);
284	>	//                     System.err.printf(
285	>	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
286	>	//                         lastTestCase, currentRun, runsPerTest);
287	>	//                     System.err.println("availableProcessors=" +
288	>	//                         Runtime.getRuntime().availableProcessors());
289	>	//                     System.err.printf("cpu model = %s%n", cpuModel());
290	>	dumpTestThreads();
291	>	// one stack dump is probably enough; more would be spam
292	>	break;
293	>	}
294	>	lastTestCase = currentTestCase;
295	>	}}};
296	>	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
297	>	thread.setDaemon(true);
298	>	thread.start();
299	>	}
300	>
301	>	//     public static String cpuModel() {
302	>	//         try {
303	>	//             java.util.regex.Matcher matcher
304	>	//               = Pattern.compile("model name\\s*: (.*)")
305	>	//                 .matcher(new String(
306	>	//                     java.nio.file.Files.readAllBytes(
307	>	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
308	>	//             matcher.find();
309	>	//             return matcher.group(1);
310	>	//         } catch (Exception ex) { return null; }
311	>	//     }
312	>
313	>	public void runBare() throws Throwable {
314	>	currentTestCase = this;
315	>	if (methodFilter == null
316	>	|| methodFilter.matcher(toString()).find())
317	>	super.runBare();
318	>	}
319	>
320	>	protected void runTest() throws Throwable {
321	>	for (int i = 0; i < runsPerTest; i++) {
322	>	// currentRun = i;
323	>	if (profileTests)
324	>	runTestProfiled();
325	>	else
326	>	super.runTest();
327	>	}
328	>	}
329	>
330	>	protected void runTestProfiled() throws Throwable {
331	>	for (int i = 0; i < 2; i++) {
332	>	long startTime = System.nanoTime();
333	>	super.runTest();
334	>	long elapsedMillis = millisElapsedSince(startTime);
335	>	if (elapsedMillis < profileThreshold)
336	>	break;
337	>	// Never report first run of any test; treat it as a
338	>	// warmup run, notably to trigger all needed classloading,
339	>	if (i > 0)
340	>	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
341	>	}
342	>	}
343	>
344	>	/**
345	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
346		*/
347		public static void main(String[] args) {
348	+	main(suite(), args);
349	+	}
350	+
351	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
352	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
353	+	long runTime;
354	+	public void startTest(Test test) {}
355	+	protected void printHeader(long runTime) {
356	+	this.runTime = runTime; // defer printing for later
357	+	}
358	+	protected void printFooter(TestResult result) {
359	+	if (result.wasSuccessful()) {
360	+	getWriter().println("OK (" + result.runCount() + " tests)"
361	+	+ "  Time: " + elapsedTimeAsString(runTime));
362	+	} else {
363	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
364	+	super.printFooter(result);
365	+	}
366	+	}
367	+	}
368	+
369	+	/**
370	+	* Returns a TestRunner that doesn't bother with unnecessary
371	+	* fluff, like printing a "." for each test case.
372	+	*/
373	+	static junit.textui.TestRunner newPithyTestRunner() {
374	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
375	+	runner.setPrinter(new PithyResultPrinter(System.out));
376	+	return runner;
377	+	}
378	+
379	+	/**
380	+	* Runs all unit tests in the given test suite.
381	+	* Actual behavior influenced by jsr166.* system properties.
382	+	*/
383	+	static void main(Test suite, String[] args) {
384		if (useSecurityManager) {
385		System.err.println("Setting a permissive security manager");
386		Policy.setPolicy(permissivePolicy());
387		System.setSecurityManager(new SecurityManager());
388		}
389	<	int iters = (args.length == 0) ? 1 : Integer.parseInt(args[0]);
390	<
391	<	Test s = suite();
392	<	for (int i = 0; i < iters; ++i) {
112	<	junit.textui.TestRunner.run(s);
389	>	for (int i = 0; i < suiteRuns; i++) {
390	>	TestResult result = newPithyTestRunner().doRun(suite);
391	>	if (!result.wasSuccessful())
392	>	System.exit(1);
393		System.gc();
394		System.runFinalization();
395		}
396	<	System.exit(0);
396	>	}
397	>
398	>	public static TestSuite newTestSuite(Object... suiteOrClasses) {
399	>	TestSuite suite = new TestSuite();
400	>	for (Object suiteOrClass : suiteOrClasses) {
401	>	if (suiteOrClass instanceof TestSuite)
402	>	suite.addTest((TestSuite) suiteOrClass);
403	>	else if (suiteOrClass instanceof Class)
404	>	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
405	>	else
406	>	throw new ClassCastException("not a test suite or class");
407	>	}
408	>	return suite;
409	>	}
410	>
411	>	public static void addNamedTestClasses(TestSuite suite,
412	>	String... testClassNames) {
413	>	for (String testClassName : testClassNames) {
414	>	try {
415	>	Class<?> testClass = Class.forName(testClassName);
416	>	Method m = testClass.getDeclaredMethod("suite",
417	>	new Class<?>[0]);
418	>	suite.addTest(newTestSuite((Test)m.invoke(null)));
419	>	} catch (Exception e) {
420	>	throw new Error("Missing test class", e);
421	>	}
422	>	}
423	>	}
424	>
425	>	public static final double JAVA_CLASS_VERSION;
426	>	public static final String JAVA_SPECIFICATION_VERSION;
427	>	static {
428	>	try {
429	>	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
430	>	new java.security.PrivilegedAction<Double>() {
431	>	public Double run() {
432	>	return Double.valueOf(System.getProperty("java.class.version"));}});
433	>	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
434	>	new java.security.PrivilegedAction<String>() {
435	>	public String run() {
436	>	return System.getProperty("java.specification.version");}});
437	>	} catch (Throwable t) {
438	>	throw new Error(t);
439	>	}
440	>	}
441	>
442	>	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
443	>	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
444	>	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
445	>	public static boolean atLeastJava9() {
446	>	return JAVA_CLASS_VERSION >= 53.0
447	>	// As of 2015-09, java9 still uses 52.0 class file version
448	>	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
449	>	}
450	>	public static boolean atLeastJava10() {
451	>	return JAVA_CLASS_VERSION >= 54.0
452	>	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
453		}
454
455		/**
456	<	* Collects all JSR166 unit tests as one suite
456	>	* Collects all JSR166 unit tests as one suite.
457		*/
458		public static Test suite() {
459	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
460	<
461	<	suite.addTest(ForkJoinPoolTest.suite());
462	<	suite.addTest(ForkJoinTaskTest.suite());
463	<	suite.addTest(RecursiveActionTest.suite());
464	<	suite.addTest(RecursiveTaskTest.suite());
465	<	suite.addTest(LinkedTransferQueueTest.suite());
466	<	suite.addTest(PhaserTest.suite());
467	<	suite.addTest(ThreadLocalRandomTest.suite());
468	<	suite.addTest(AbstractExecutorServiceTest.suite());
469	<	suite.addTest(AbstractQueueTest.suite());
470	<	suite.addTest(AbstractQueuedSynchronizerTest.suite());
471	<	suite.addTest(AbstractQueuedLongSynchronizerTest.suite());
472	<	suite.addTest(ArrayBlockingQueueTest.suite());
473	<	suite.addTest(ArrayDequeTest.suite());
474	<	suite.addTest(AtomicBooleanTest.suite());
475	<	suite.addTest(AtomicIntegerArrayTest.suite());
476	<	suite.addTest(AtomicIntegerFieldUpdaterTest.suite());
477	<	suite.addTest(AtomicIntegerTest.suite());
478	<	suite.addTest(AtomicLongArrayTest.suite());
479	<	suite.addTest(AtomicLongFieldUpdaterTest.suite());
480	<	suite.addTest(AtomicLongTest.suite());
481	<	suite.addTest(AtomicMarkableReferenceTest.suite());
482	<	suite.addTest(AtomicReferenceArrayTest.suite());
483	<	suite.addTest(AtomicReferenceFieldUpdaterTest.suite());
484	<	suite.addTest(AtomicReferenceTest.suite());
485	<	suite.addTest(AtomicStampedReferenceTest.suite());
486	<	suite.addTest(ConcurrentHashMapTest.suite());
487	<	suite.addTest(ConcurrentLinkedDequeTest.suite());
488	<	suite.addTest(ConcurrentLinkedQueueTest.suite());
489	<	suite.addTest(ConcurrentSkipListMapTest.suite());
490	<	suite.addTest(ConcurrentSkipListSubMapTest.suite());
491	<	suite.addTest(ConcurrentSkipListSetTest.suite());
492	<	suite.addTest(ConcurrentSkipListSubSetTest.suite());
493	<	suite.addTest(CopyOnWriteArrayListTest.suite());
494	<	suite.addTest(CopyOnWriteArraySetTest.suite());
495	<	suite.addTest(CountDownLatchTest.suite());
496	<	suite.addTest(CyclicBarrierTest.suite());
497	<	suite.addTest(DelayQueueTest.suite());
498	<	suite.addTest(EntryTest.suite());
499	<	suite.addTest(ExchangerTest.suite());
500	<	suite.addTest(ExecutorsTest.suite());
501	<	suite.addTest(ExecutorCompletionServiceTest.suite());
502	<	suite.addTest(FutureTaskTest.suite());
503	<	suite.addTest(LinkedBlockingDequeTest.suite());
504	<	suite.addTest(LinkedBlockingQueueTest.suite());
505	<	suite.addTest(LinkedListTest.suite());
506	<	suite.addTest(LockSupportTest.suite());
507	<	suite.addTest(PriorityBlockingQueueTest.suite());
508	<	suite.addTest(PriorityQueueTest.suite());
509	<	suite.addTest(ReentrantLockTest.suite());
510	<	suite.addTest(ReentrantReadWriteLockTest.suite());
511	<	suite.addTest(ScheduledExecutorTest.suite());
512	<	suite.addTest(ScheduledExecutorSubclassTest.suite());
513	<	suite.addTest(SemaphoreTest.suite());
514	<	suite.addTest(SynchronousQueueTest.suite());
515	<	suite.addTest(SystemTest.suite());
516	<	suite.addTest(ThreadLocalTest.suite());
517	<	suite.addTest(ThreadPoolExecutorTest.suite());
518	<	suite.addTest(ThreadPoolExecutorSubclassTest.suite());
519	<	suite.addTest(ThreadTest.suite());
520	<	suite.addTest(TimeUnitTest.suite());
521	<	suite.addTest(TreeMapTest.suite());
522	<	suite.addTest(TreeSetTest.suite());
523	<	suite.addTest(TreeSubMapTest.suite());
524	<	suite.addTest(TreeSubSetTest.suite());
459	>	// Java7+ test classes
460	>	TestSuite suite = newTestSuite(
461	>	ForkJoinPoolTest.suite(),
462	>	ForkJoinTaskTest.suite(),
463	>	RecursiveActionTest.suite(),
464	>	RecursiveTaskTest.suite(),
465	>	LinkedTransferQueueTest.suite(),
466	>	PhaserTest.suite(),
467	>	ThreadLocalRandomTest.suite(),
468	>	AbstractExecutorServiceTest.suite(),
469	>	AbstractQueueTest.suite(),
470	>	AbstractQueuedSynchronizerTest.suite(),
471	>	AbstractQueuedLongSynchronizerTest.suite(),
472	>	ArrayBlockingQueueTest.suite(),
473	>	ArrayDequeTest.suite(),
474	>	ArrayListTest.suite(),
475	>	AtomicBooleanTest.suite(),
476	>	AtomicIntegerArrayTest.suite(),
477	>	AtomicIntegerFieldUpdaterTest.suite(),
478	>	AtomicIntegerTest.suite(),
479	>	AtomicLongArrayTest.suite(),
480	>	AtomicLongFieldUpdaterTest.suite(),
481	>	AtomicLongTest.suite(),
482	>	AtomicMarkableReferenceTest.suite(),
483	>	AtomicReferenceArrayTest.suite(),
484	>	AtomicReferenceFieldUpdaterTest.suite(),
485	>	AtomicReferenceTest.suite(),
486	>	AtomicStampedReferenceTest.suite(),
487	>	ConcurrentHashMapTest.suite(),
488	>	ConcurrentLinkedDequeTest.suite(),
489	>	ConcurrentLinkedQueueTest.suite(),
490	>	ConcurrentSkipListMapTest.suite(),
491	>	ConcurrentSkipListSubMapTest.suite(),
492	>	ConcurrentSkipListSetTest.suite(),
493	>	ConcurrentSkipListSubSetTest.suite(),
494	>	CopyOnWriteArrayListTest.suite(),
495	>	CopyOnWriteArraySetTest.suite(),
496	>	CountDownLatchTest.suite(),
497	>	CountedCompleterTest.suite(),
498	>	CyclicBarrierTest.suite(),
499	>	DelayQueueTest.suite(),
500	>	EntryTest.suite(),
501	>	ExchangerTest.suite(),
502	>	ExecutorsTest.suite(),
503	>	ExecutorCompletionServiceTest.suite(),
504	>	FutureTaskTest.suite(),
505	>	LinkedBlockingDequeTest.suite(),
506	>	LinkedBlockingQueueTest.suite(),
507	>	LinkedListTest.suite(),
508	>	LockSupportTest.suite(),
509	>	PriorityBlockingQueueTest.suite(),
510	>	PriorityQueueTest.suite(),
511	>	ReentrantLockTest.suite(),
512	>	ReentrantReadWriteLockTest.suite(),
513	>	ScheduledExecutorTest.suite(),
514	>	ScheduledExecutorSubclassTest.suite(),
515	>	SemaphoreTest.suite(),
516	>	SynchronousQueueTest.suite(),
517	>	SystemTest.suite(),
518	>	ThreadLocalTest.suite(),
519	>	ThreadPoolExecutorTest.suite(),
520	>	ThreadPoolExecutorSubclassTest.suite(),
521	>	ThreadTest.suite(),
522	>	TimeUnitTest.suite(),
523	>	TreeMapTest.suite(),
524	>	TreeSetTest.suite(),
525	>	TreeSubMapTest.suite(),
526	>	TreeSubSetTest.suite(),
527	>	VectorTest.suite());
528	>
529	>	// Java8+ test classes
530	>	if (atLeastJava8()) {
531	>	String[] java8TestClassNames = {
532	>	"ArrayDeque8Test",
533	>	"Atomic8Test",
534	>	"CompletableFutureTest",
535	>	"ConcurrentHashMap8Test",
536	>	"CountedCompleter8Test",
537	>	"DoubleAccumulatorTest",
538	>	"DoubleAdderTest",
539	>	"ForkJoinPool8Test",
540	>	"ForkJoinTask8Test",
541	>	"LinkedBlockingDeque8Test",
542	>	"LinkedBlockingQueue8Test",
543	>	"LongAccumulatorTest",
544	>	"LongAdderTest",
545	>	"SplittableRandomTest",
546	>	"StampedLockTest",
547	>	"SubmissionPublisherTest",
548	>	"ThreadLocalRandom8Test",
549	>	"TimeUnit8Test",
550	>	};
551	>	addNamedTestClasses(suite, java8TestClassNames);
552	>	}
553	>
554	>	// Java9+ test classes
555	>	if (atLeastJava9()) {
556	>	String[] java9TestClassNames = {
557	>	"AtomicBoolean9Test",
558	>	"AtomicInteger9Test",
559	>	"AtomicIntegerArray9Test",
560	>	"AtomicLong9Test",
561	>	"AtomicLongArray9Test",
562	>	"AtomicReference9Test",
563	>	"AtomicReferenceArray9Test",
564	>	"ExecutorCompletionService9Test",
565	>	"ForkJoinPool9Test",
566	>	};
567	>	addNamedTestClasses(suite, java9TestClassNames);
568	>	}
569
570		return suite;
571		}
572
573	+	/** Returns list of junit-style test method names in given class. */
574	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
575	+	Method[] methods = testClass.getDeclaredMethods();
576	+	ArrayList<String> names = new ArrayList<>(methods.length);
577	+	for (Method method : methods) {
578	+	if (method.getName().startsWith("test")
579	+	&& Modifier.isPublic(method.getModifiers())
580	+	// method.getParameterCount() requires jdk8+
581	+	&& method.getParameterTypes().length == 0) {
582	+	names.add(method.getName());
583	+	}
584	+	}
585	+	return names;
586	+	}
587	+
588	+	/**
589	+	* Returns junit-style testSuite for the given test class, but
590	+	* parameterized by passing extra data to each test.
591	+	*/
592	+	public static <ExtraData> Test parameterizedTestSuite
593	+	(Class<? extends JSR166TestCase> testClass,
594	+	Class<ExtraData> dataClass,
595	+	ExtraData data) {
596	+	try {
597	+	TestSuite suite = new TestSuite();
598	+	Constructor c =
599	+	testClass.getDeclaredConstructor(dataClass, String.class);
600	+	for (String methodName : testMethodNames(testClass))
601	+	suite.addTest((Test) c.newInstance(data, methodName));
602	+	return suite;
603	+	} catch (Exception e) {
604	+	throw new Error(e);
605	+	}
606	+	}
607	+
608	+	/**
609	+	* Returns junit-style testSuite for the jdk8 extension of the
610	+	* given test class, but parameterized by passing extra data to
611	+	* each test.  Uses reflection to allow compilation in jdk7.
612	+	*/
613	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
614	+	(Class<? extends JSR166TestCase> testClass,
615	+	Class<ExtraData> dataClass,
616	+	ExtraData data) {
617	+	if (atLeastJava8()) {
618	+	String name = testClass.getName();
619	+	String name8 = name.replaceAll("Test$", "8Test");
620	+	if (name.equals(name8)) throw new Error(name);
621	+	try {
622	+	return (Test)
623	+	Class.forName(name8)
624	+	.getMethod("testSuite", new Class[] { dataClass })
625	+	.invoke(null, data);
626	+	} catch (Exception e) {
627	+	throw new Error(e);
628	+	}
629	+	} else {
630	+	return new TestSuite();
631	+	}
632	+	}
633	+
634	+	// Delays for timing-dependent tests, in milliseconds.
635
636		public static long SHORT_DELAY_MS;
637		public static long SMALL_DELAY_MS;
638		public static long MEDIUM_DELAY_MS;
639		public static long LONG_DELAY_MS;
640
199	–
641		/**
642	<	* Returns the shortest timed delay. This could
643	<	* be reimplemented to use for example a Property.
642	>	* Returns the shortest timed delay. This can be scaled up for
643	>	* slow machines using the jsr166.delay.factor system property,
644	>	* or via jtreg's -timeoutFactor: flag.
645	>	* http://openjdk.java.net/jtreg/command-help.html
646		*/
647		protected long getShortDelay() {
648	<	return 50;
648	>	return (long) (50 * delayFactor);
649		}
650
208	–
651		/**
652		* Sets delays as multiples of SHORT_DELAY.
653		*/
#	Line 213 | Line 655 | public class JSR166TestCase extends Test
655		SHORT_DELAY_MS = getShortDelay();
656		SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
657		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
658	<	LONG_DELAY_MS   = SHORT_DELAY_MS * 50;
658	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
659	>	}
660	>
661	>	private static final long TIMEOUT_DELAY_MS
662	>	= (long) (12.0 * Math.cbrt(delayFactor));
663	>
664	>	/**
665	>	* Returns a timeout in milliseconds to be used in tests that verify
666	>	* that operations block or time out.  We want this to be longer
667	>	* than the OS scheduling quantum, but not too long, so don't scale
668	>	* linearly with delayFactor; we use "crazy" cube root instead.
669	>	*/
670	>	static long timeoutMillis() {
671	>	return TIMEOUT_DELAY_MS;
672	>	}
673	>
674	>	/**
675	>	* Returns a new Date instance representing a time at least
676	>	* delayMillis milliseconds in the future.
677	>	*/
678	>	Date delayedDate(long delayMillis) {
679	>	// Add 1 because currentTimeMillis is known to round into the past.
680	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
681		}
682
683		/**
684		* The first exception encountered if any threadAssertXXX method fails.
685		*/
686		private final AtomicReference<Throwable> threadFailure
687	<	= new AtomicReference<Throwable>(null);
687	>	= new AtomicReference<>(null);
688
689		/**
690		* Records an exception so that it can be rethrown later in the test
#	Line 229 | Line 693 | public class JSR166TestCase extends Test
693		* the same test have no effect.
694		*/
695		public void threadRecordFailure(Throwable t) {
696	+	System.err.println(t);
697	+	dumpTestThreads();
698		threadFailure.compareAndSet(null, t);
699		}
700
#	Line 236 | Line 702 | public class JSR166TestCase extends Test
702		setDelays();
703		}
704
705	+	void tearDownFail(String format, Object... args) {
706	+	String msg = toString() + ": " + String.format(format, args);
707	+	System.err.println(msg);
708	+	dumpTestThreads();
709	+	throw new AssertionFailedError(msg);
710	+	}
711	+
712		/**
713	+	* Extra checks that get done for all test cases.
714	+	*
715		* Triggers test case failure if any thread assertions have failed,
716		* by rethrowing, in the test harness thread, any exception recorded
717		* earlier by threadRecordFailure.
718	+	*
719	+	* Triggers test case failure if interrupt status is set in the main thread.
720		*/
721		public void tearDown() throws Exception {
722	<	Throwable t = threadFailure.get();
722	>	Throwable t = threadFailure.getAndSet(null);
723		if (t != null) {
724		if (t instanceof Error)
725		throw (Error) t;
#	Line 257 | Line 734 | public class JSR166TestCase extends Test
734		throw afe;
735		}
736		}
737	+
738	+	if (Thread.interrupted())
739	+	tearDownFail("interrupt status set in main thread");
740	+
741	+	checkForkJoinPoolThreadLeaks();
742	+	}
743	+
744	+	/**
745	+	* Finds missing PoolCleaners
746	+	*/
747	+	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
748	+	Thread[] survivors = new Thread[7];
749	+	int count = Thread.enumerate(survivors);
750	+	for (int i = 0; i < count; i++) {
751	+	Thread thread = survivors[i];
752	+	String name = thread.getName();
753	+	if (name.startsWith("ForkJoinPool-")) {
754	+	// give thread some time to terminate
755	+	thread.join(LONG_DELAY_MS);
756	+	if (thread.isAlive())
757	+	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
758	+	thread);
759	+	}
760	+	}
761	+
762	+	if (!ForkJoinPool.commonPool()
763	+	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
764	+	tearDownFail("ForkJoin common pool thread stuck");
765		}
766
767		/**
#	Line 269 | Line 774 | public class JSR166TestCase extends Test
774		fail(reason);
775		} catch (AssertionFailedError t) {
776		threadRecordFailure(t);
777	<	fail(reason);
777	>	throw t;
778		}
779		}
780
#	Line 337 | Line 842 | public class JSR166TestCase extends Test
842		public void threadAssertEquals(Object x, Object y) {
843		try {
844		assertEquals(x, y);
845	<	} catch (AssertionFailedError t) {
846	<	threadRecordFailure(t);
847	<	throw t;
848	<	} catch (Throwable t) {
849	<	threadUnexpectedException(t);
845	>	} catch (AssertionFailedError fail) {
846	>	threadRecordFailure(fail);
847	>	throw fail;
848	>	} catch (Throwable fail) {
849	>	threadUnexpectedException(fail);
850		}
851		}
852
#	Line 353 | Line 858 | public class JSR166TestCase extends Test
858		public void threadAssertSame(Object x, Object y) {
859		try {
860		assertSame(x, y);
861	<	} catch (AssertionFailedError t) {
862	<	threadRecordFailure(t);
863	<	throw t;
861	>	} catch (AssertionFailedError fail) {
862	>	threadRecordFailure(fail);
863	>	throw fail;
864		}
865		}
866
#	Line 388 | Line 893 | public class JSR166TestCase extends Test
893		else {
894		AssertionFailedError afe =
895		new AssertionFailedError("unexpected exception: " + t);
896	<	t.initCause(t);
896	>	afe.initCause(t);
897		throw afe;
898		}
899		}
900
901		/**
902	+	* Delays, via Thread.sleep, for the given millisecond delay, but
903	+	* if the sleep is shorter than specified, may re-sleep or yield
904	+	* until time elapses.  Ensures that the given time, as measured
905	+	* by System.nanoTime(), has elapsed.
906	+	*/
907	+	static void delay(long millis) throws InterruptedException {
908	+	long nanos = millis * (1000 * 1000);
909	+	final long wakeupTime = System.nanoTime() + nanos;
910	+	do {
911	+	if (millis > 0L)
912	+	Thread.sleep(millis);
913	+	else // too short to sleep
914	+	Thread.yield();
915	+	nanos = wakeupTime - System.nanoTime();
916	+	millis = nanos / (1000 * 1000);
917	+	} while (nanos >= 0L);
918	+	}
919	+
920	+	/**
921	+	* Allows use of try-with-resources with per-test thread pools.
922	+	*/
923	+	class PoolCleaner implements AutoCloseable {
924	+	private final ExecutorService pool;
925	+	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
926	+	public void close() { joinPool(pool); }
927	+	}
928	+
929	+	/**
930	+	* An extension of PoolCleaner that has an action to release the pool.
931	+	*/
932	+	class PoolCleanerWithReleaser extends PoolCleaner {
933	+	private final Runnable releaser;
934	+	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
935	+	super(pool);
936	+	this.releaser = releaser;
937	+	}
938	+	public void close() {
939	+	try {
940	+	releaser.run();
941	+	} finally {
942	+	super.close();
943	+	}
944	+	}
945	+	}
946	+
947	+	PoolCleaner cleaner(ExecutorService pool) {
948	+	return new PoolCleaner(pool);
949	+	}
950	+
951	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
952	+	return new PoolCleanerWithReleaser(pool, releaser);
953	+	}
954	+
955	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
956	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
957	+	}
958	+
959	+	Runnable releaser(final CountDownLatch latch) {
960	+	return new Runnable() { public void run() {
961	+	do { latch.countDown(); }
962	+	while (latch.getCount() > 0);
963	+	}};
964	+	}
965	+
966	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
967	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
968	+	}
969	+
970	+	Runnable releaser(final AtomicBoolean flag) {
971	+	return new Runnable() { public void run() { flag.set(true); }};
972	+	}
973	+
974	+	/**
975		* Waits out termination of a thread pool or fails doing so.
976		*/
977	<	public void joinPool(ExecutorService exec) {
977	>	void joinPool(ExecutorService pool) {
978		try {
979	<	exec.shutdown();
980	<	assertTrue("ExecutorService did not terminate in a timely manner",
981	<	exec.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
979	>	pool.shutdown();
980	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
981	>	try {
982	>	threadFail("ExecutorService " + pool +
983	>	" did not terminate in a timely manner");
984	>	} finally {
985	>	// last resort, for the benefit of subsequent tests
986	>	pool.shutdownNow();
987	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
988	>	}
989	>	}
990		} catch (SecurityException ok) {
991		// Allowed in case test doesn't have privs
992	<	} catch (InterruptedException ie) {
993	<	fail("Unexpected InterruptedException");
992	>	} catch (InterruptedException fail) {
993	>	threadFail("Unexpected InterruptedException");
994	>	}
995	>	}
996	>
997	>	/**
998	>	* Like Runnable, but with the freedom to throw anything.
999	>	* junit folks had the same idea:
1000	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
1001	>	*/
1002	>	interface Action { public void run() throws Throwable; }
1003	>
1004	>	/**
1005	>	* Runs all the given actions in parallel, failing if any fail.
1006	>	* Useful for running multiple variants of tests that are
1007	>	* necessarily individually slow because they must block.
1008	>	*/
1009	>	void testInParallel(Action ... actions) {
1010	>	ExecutorService pool = Executors.newCachedThreadPool();
1011	>	try (PoolCleaner cleaner = cleaner(pool)) {
1012	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1013	>	for (final Action action : actions)
1014	>	futures.add(pool.submit(new CheckedRunnable() {
1015	>	public void realRun() throws Throwable { action.run();}}));
1016	>	for (Future<?> future : futures)
1017	>	try {
1018	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1019	>	} catch (ExecutionException ex) {
1020	>	threadUnexpectedException(ex.getCause());
1021	>	} catch (Exception ex) {
1022	>	threadUnexpectedException(ex);
1023	>	}
1024	>	}
1025	>	}
1026	>
1027	>	/**
1028	>	* A debugging tool to print stack traces of most threads, as jstack does.
1029	>	* Uninteresting threads are filtered out.
1030	>	*/
1031	>	static void dumpTestThreads() {
1032	>	SecurityManager sm = System.getSecurityManager();
1033	>	if (sm != null) {
1034	>	try {
1035	>	System.setSecurityManager(null);
1036	>	} catch (SecurityException giveUp) {
1037	>	return;
1038	>	}
1039	>	}
1040	>
1041	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1042	>	System.err.println("------ stacktrace dump start ------");
1043	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1044	>	final String name = info.getThreadName();
1045	>	String lockName;
1046	>	if ("Signal Dispatcher".equals(name))
1047	>	continue;
1048	>	if ("Reference Handler".equals(name)
1049	>	&& (lockName = info.getLockName()) != null
1050	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1051	>	continue;
1052	>	if ("Finalizer".equals(name)
1053	>	&& (lockName = info.getLockName()) != null
1054	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1055	>	continue;
1056	>	if ("checkForWedgedTest".equals(name))
1057	>	continue;
1058	>	System.err.print(info);
1059	>	}
1060	>	System.err.println("------ stacktrace dump end ------");
1061	>
1062	>	if (sm != null) System.setSecurityManager(sm);
1063	>	}
1064	>
1065	>	/**
1066	>	* Checks that thread eventually enters the expected blocked thread state.
1067	>	*/
1068	>	void assertThreadBlocks(Thread thread, Thread.State expected) {
1069	>	// always sleep at least 1 ms, with high probability avoiding
1070	>	// transitory states
1071	>	for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
1072	>	try { delay(1); }
1073	>	catch (InterruptedException fail) {
1074	>	fail("Unexpected InterruptedException");
1075	>	}
1076	>	Thread.State s = thread.getState();
1077	>	if (s == expected)
1078	>	return;
1079	>	else if (s == Thread.State.TERMINATED)
1080	>	fail("Unexpected thread termination");
1081	>	}
1082	>	fail("timed out waiting for thread to enter thread state " + expected);
1083	>	}
1084	>
1085	>	/**
1086	>	* Checks that thread does not terminate within the default
1087	>	* millisecond delay of {@code timeoutMillis()}.
1088	>	* TODO: REMOVEME
1089	>	*/
1090	>	void assertThreadStaysAlive(Thread thread) {
1091	>	assertThreadStaysAlive(thread, timeoutMillis());
1092	>	}
1093	>
1094	>	/**
1095	>	* Checks that thread does not terminate within the given millisecond delay.
1096	>	* TODO: REMOVEME
1097	>	*/
1098	>	void assertThreadStaysAlive(Thread thread, long millis) {
1099	>	try {
1100	>	// No need to optimize the failing case via Thread.join.
1101	>	delay(millis);
1102	>	assertTrue(thread.isAlive());
1103	>	} catch (InterruptedException fail) {
1104	>	threadFail("Unexpected InterruptedException");
1105		}
1106		}
1107
1108	+	/**
1109	+	* Checks that future.get times out, with the default timeout of
1110	+	* {@code timeoutMillis()}.
1111	+	*/
1112	+	void assertFutureTimesOut(Future future) {
1113	+	assertFutureTimesOut(future, timeoutMillis());
1114	+	}
1115	+
1116	+	/**
1117	+	* Checks that future.get times out, with the given millisecond timeout.
1118	+	*/
1119	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
1120	+	long startTime = System.nanoTime();
1121	+	try {
1122	+	future.get(timeoutMillis, MILLISECONDS);
1123	+	shouldThrow();
1124	+	} catch (TimeoutException success) {
1125	+	} catch (Exception fail) {
1126	+	threadUnexpectedException(fail);
1127	+	} finally { future.cancel(true); }
1128	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1129	+	}
1130
1131		/**
1132		* Fails with message "should throw exception".
#	Line 424 | Line 1143 | public class JSR166TestCase extends Test
1143		}
1144
1145		/**
1146	+	* The maximum number of consecutive spurious wakeups we should
1147	+	* tolerate (from APIs like LockSupport.park) before failing a test.
1148	+	*/
1149	+	static final int MAX_SPURIOUS_WAKEUPS = 10;
1150	+
1151	+	/**
1152		* The number of elements to place in collections, arrays, etc.
1153		*/
1154		public static final int SIZE = 20;
#	Line 448 | Line 1173 | public class JSR166TestCase extends Test
1173		public static final Integer m6  = new Integer(-6);
1174		public static final Integer m10 = new Integer(-10);
1175
451	–
1176		/**
1177		* Runs Runnable r with a security policy that permits precisely
1178		* the specified permissions.  If there is no current security
#	Line 460 | Line 1184 | public class JSR166TestCase extends Test
1184		SecurityManager sm = System.getSecurityManager();
1185		if (sm == null) {
1186		r.run();
1187	+	}
1188	+	runWithSecurityManagerWithPermissions(r, permissions);
1189	+	}
1190	+
1191	+	/**
1192	+	* Runs Runnable r with a security policy that permits precisely
1193	+	* the specified permissions.  If there is no current security
1194	+	* manager, a temporary one is set for the duration of the
1195	+	* Runnable.  We require that any security manager permit
1196	+	* getPolicy/setPolicy.
1197	+	*/
1198	+	public void runWithSecurityManagerWithPermissions(Runnable r,
1199	+	Permission... permissions) {
1200	+	SecurityManager sm = System.getSecurityManager();
1201	+	if (sm == null) {
1202		Policy savedPolicy = Policy.getPolicy();
1203		try {
1204		Policy.setPolicy(permissivePolicy());
1205		System.setSecurityManager(new SecurityManager());
1206	<	runWithPermissions(r, permissions);
1206	>	runWithSecurityManagerWithPermissions(r, permissions);
1207		} finally {
1208		System.setSecurityManager(null);
1209		Policy.setPolicy(savedPolicy);
#	Line 512 | Line 1251 | public class JSR166TestCase extends Test
1251		return perms.implies(p);
1252		}
1253		public void refresh() {}
1254	+	public String toString() {
1255	+	List<Permission> ps = new ArrayList<>();
1256	+	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1257	+	ps.add(e.nextElement());
1258	+	return "AdjustablePolicy with permissions " + ps;
1259	+	}
1260		}
1261
1262		/**
#	Line 534 | Line 1279 | public class JSR166TestCase extends Test
1279		}
1280
1281		/**
1282	<	* Sleep until the timeout has elapsed, or interrupted.
1283	<	* Does <em>NOT</em> throw InterruptedException.
1282	>	* Sleeps until the given time has elapsed.
1283	>	* Throws AssertionFailedError if interrupted.
1284		*/
1285	<	void sleepTillInterrupted(long timeoutMillis) {
1285	>	static void sleep(long millis) {
1286		try {
1287	<	Thread.sleep(timeoutMillis);
1288	<	} catch (InterruptedException wakeup) {}
1287	>	delay(millis);
1288	>	} catch (InterruptedException fail) {
1289	>	AssertionFailedError afe =
1290	>	new AssertionFailedError("Unexpected InterruptedException");
1291	>	afe.initCause(fail);
1292	>	throw afe;
1293	>	}
1294	>	}
1295	>
1296	>	/**
1297	>	* Spin-waits up to the specified number of milliseconds for the given
1298	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1299	>	*/
1300	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1301	>	long startTime = 0L;
1302	>	for (;;) {
1303	>	Thread.State s = thread.getState();
1304	>	if (s == Thread.State.BLOCKED ||
1305	>	s == Thread.State.WAITING ||
1306	>	s == Thread.State.TIMED_WAITING)
1307	>	return;
1308	>	else if (s == Thread.State.TERMINATED)
1309	>	fail("Unexpected thread termination");
1310	>	else if (startTime == 0L)
1311	>	startTime = System.nanoTime();
1312	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1313	>	threadAssertTrue(thread.isAlive());
1314	>	fail("timed out waiting for thread to enter wait state");
1315	>	}
1316	>	Thread.yield();
1317	>	}
1318	>	}
1319	>
1320	>	/**
1321	>	* Spin-waits up to the specified number of milliseconds for the given
1322	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1323	>	* and additionally satisfy the given condition.
1324	>	*/
1325	>	void waitForThreadToEnterWaitState(
1326	>	Thread thread, long timeoutMillis, Callable<Boolean> waitingForGodot) {
1327	>	long startTime = 0L;
1328	>	for (;;) {
1329	>	Thread.State s = thread.getState();
1330	>	if (s == Thread.State.BLOCKED ||
1331	>	s == Thread.State.WAITING ||
1332	>	s == Thread.State.TIMED_WAITING) {
1333	>	try {
1334	>	if (waitingForGodot.call())
1335	>	return;
1336	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1337	>	}
1338	>	else if (s == Thread.State.TERMINATED)
1339	>	fail("Unexpected thread termination");
1340	>	else if (startTime == 0L)
1341	>	startTime = System.nanoTime();
1342	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1343	>	threadAssertTrue(thread.isAlive());
1344	>	fail("timed out waiting for thread to enter wait state");
1345	>	}
1346	>	Thread.yield();
1347	>	}
1348	>	}
1349	>
1350	>	/**
1351	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1352	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1353	>	*/
1354	>	void waitForThreadToEnterWaitState(Thread thread) {
1355	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1356	>	}
1357	>
1358	>	/**
1359	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1360	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1361	>	* and additionally satisfy the given condition.
1362	>	*/
1363	>	void waitForThreadToEnterWaitState(
1364	>	Thread thread, Callable<Boolean> waitingForGodot) {
1365	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1366	>	}
1367	>
1368	>	/**
1369	>	* Returns the number of milliseconds since time given by
1370	>	* startNanoTime, which must have been previously returned from a
1371	>	* call to {@link System#nanoTime()}.
1372	>	*/
1373	>	static long millisElapsedSince(long startNanoTime) {
1374	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1375	>	}
1376	>
1377	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1378	>	//         long startTime = System.nanoTime();
1379	>	//         try {
1380	>	//             r.run();
1381	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1382	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1383	>	//             throw new AssertionFailedError("did not return promptly");
1384	>	//     }
1385	>
1386	>	//     void assertTerminatesPromptly(Runnable r) {
1387	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1388	>	//     }
1389	>
1390	>	/**
1391	>	* Checks that timed f.get() returns the expected value, and does not
1392	>	* wait for the timeout to elapse before returning.
1393	>	*/
1394	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1395	>	long startTime = System.nanoTime();
1396	>	try {
1397	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1398	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1399	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1400	>	throw new AssertionFailedError("timed get did not return promptly");
1401	>	}
1402	>
1403	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1404	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1405		}
1406
1407		/**
#	Line 553 | Line 1414 | public class JSR166TestCase extends Test
1414		return t;
1415		}
1416
1417	+	/**
1418	+	* Waits for the specified time (in milliseconds) for the thread
1419	+	* to terminate (using {@link Thread#join(long)}), else interrupts
1420	+	* the thread (in the hope that it may terminate later) and fails.
1421	+	*/
1422	+	void awaitTermination(Thread t, long timeoutMillis) {
1423	+	try {
1424	+	t.join(timeoutMillis);
1425	+	} catch (InterruptedException fail) {
1426	+	threadUnexpectedException(fail);
1427	+	} finally {
1428	+	if (t.getState() != Thread.State.TERMINATED) {
1429	+	t.interrupt();
1430	+	threadFail("timed out waiting for thread to terminate");
1431	+	}
1432	+	}
1433	+	}
1434	+
1435	+	/**
1436	+	* Waits for LONG_DELAY_MS milliseconds for the thread to
1437	+	* terminate (using {@link Thread#join(long)}), else interrupts
1438	+	* the thread (in the hope that it may terminate later) and fails.
1439	+	*/
1440	+	void awaitTermination(Thread t) {
1441	+	awaitTermination(t, LONG_DELAY_MS);
1442	+	}
1443	+
1444		// Some convenient Runnable classes
1445
1446		public abstract class CheckedRunnable implements Runnable {
#	Line 561 | Line 1449 | public class JSR166TestCase extends Test
1449		public final void run() {
1450		try {
1451		realRun();
1452	<	} catch (Throwable t) {
1453	<	threadUnexpectedException(t);
1452	>	} catch (Throwable fail) {
1453	>	threadUnexpectedException(fail);
1454		}
1455		}
1456		}
#	Line 615 | Line 1503 | public class JSR166TestCase extends Test
1503		realRun();
1504		threadShouldThrow("InterruptedException");
1505		} catch (InterruptedException success) {
1506	<	} catch (Throwable t) {
1507	<	threadUnexpectedException(t);
1506	>	threadAssertFalse(Thread.interrupted());
1507	>	} catch (Throwable fail) {
1508	>	threadUnexpectedException(fail);
1509		}
1510		}
1511		}
#	Line 627 | Line 1516 | public class JSR166TestCase extends Test
1516		public final T call() {
1517		try {
1518		return realCall();
1519	<	} catch (Throwable t) {
1520	<	threadUnexpectedException(t);
1519	>	} catch (Throwable fail) {
1520	>	threadUnexpectedException(fail);
1521		return null;
1522		}
1523		}
#	Line 644 | Line 1533 | public class JSR166TestCase extends Test
1533		threadShouldThrow("InterruptedException");
1534		return result;
1535		} catch (InterruptedException success) {
1536	<	} catch (Throwable t) {
1537	<	threadUnexpectedException(t);
1536	>	threadAssertFalse(Thread.interrupted());
1537	>	} catch (Throwable fail) {
1538	>	threadUnexpectedException(fail);
1539		}
1540		return null;
1541		}
#	Line 662 | Line 1552 | public class JSR166TestCase extends Test
1552		public static final String TEST_STRING = "a test string";
1553
1554		public static class StringTask implements Callable<String> {
1555	<	public String call() { return TEST_STRING; }
1555	>	final String value;
1556	>	public StringTask() { this(TEST_STRING); }
1557	>	public StringTask(String value) { this.value = value; }
1558	>	public String call() { return value; }
1559		}
1560
1561		public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1562		return new CheckedCallable<String>() {
1563	<	public String realCall() {
1563	>	protected String realCall() {
1564		try {
1565		latch.await();
1566		} catch (InterruptedException quittingTime) {}
#	Line 675 | Line 1568 | public class JSR166TestCase extends Test
1568		}};
1569		}
1570
1571	+	public Runnable countDowner(final CountDownLatch latch) {
1572	+	return new CheckedRunnable() {
1573	+	public void realRun() throws InterruptedException {
1574	+	latch.countDown();
1575	+	}};
1576	+	}
1577	+
1578	+	class LatchAwaiter extends CheckedRunnable {
1579	+	static final int NEW = 0;
1580	+	static final int RUNNING = 1;
1581	+	static final int DONE = 2;
1582	+	final CountDownLatch latch;
1583	+	int state = NEW;
1584	+	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1585	+	public void realRun() throws InterruptedException {
1586	+	state = 1;
1587	+	await(latch);
1588	+	state = 2;
1589	+	}
1590	+	}
1591	+
1592	+	public LatchAwaiter awaiter(CountDownLatch latch) {
1593	+	return new LatchAwaiter(latch);
1594	+	}
1595	+
1596	+	public void await(CountDownLatch latch, long timeoutMillis) {
1597	+	try {
1598	+	if (!latch.await(timeoutMillis, MILLISECONDS))
1599	+	fail("timed out waiting for CountDownLatch for "
1600	+	+ (timeoutMillis/1000) + " sec");
1601	+	} catch (Throwable fail) {
1602	+	threadUnexpectedException(fail);
1603	+	}
1604	+	}
1605	+
1606	+	public void await(CountDownLatch latch) {
1607	+	await(latch, LONG_DELAY_MS);
1608	+	}
1609	+
1610	+	public void await(Semaphore semaphore) {
1611	+	try {
1612	+	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1613	+	fail("timed out waiting for Semaphore for "
1614	+	+ (LONG_DELAY_MS/1000) + " sec");
1615	+	} catch (Throwable fail) {
1616	+	threadUnexpectedException(fail);
1617	+	}
1618	+	}
1619	+
1620	+	public void await(CyclicBarrier barrier) {
1621	+	try {
1622	+	barrier.await(LONG_DELAY_MS, MILLISECONDS);
1623	+	} catch (Throwable fail) {
1624	+	threadUnexpectedException(fail);
1625	+	}
1626	+	}
1627	+
1628	+	//     /**
1629	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1630	+	//      */
1631	+	//     public void await(AtomicBoolean flag) {
1632	+	//         await(flag, LONG_DELAY_MS);
1633	+	//     }
1634	+
1635	+	//     /**
1636	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1637	+	//      */
1638	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1639	+	//         long startTime = System.nanoTime();
1640	+	//         while (!flag.get()) {
1641	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1642	+	//                 throw new AssertionFailedError("timed out");
1643	+	//             Thread.yield();
1644	+	//         }
1645	+	//     }
1646	+
1647		public static class NPETask implements Callable<String> {
1648		public String call() { throw new NullPointerException(); }
1649		}
#	Line 685 | Line 1654 | public class JSR166TestCase extends Test
1654
1655		public class ShortRunnable extends CheckedRunnable {
1656		protected void realRun() throws Throwable {
1657	<	Thread.sleep(SHORT_DELAY_MS);
1657	>	delay(SHORT_DELAY_MS);
1658		}
1659		}
1660
1661		public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1662		protected void realRun() throws InterruptedException {
1663	<	Thread.sleep(SHORT_DELAY_MS);
1663	>	delay(SHORT_DELAY_MS);
1664		}
1665		}
1666
1667		public class SmallRunnable extends CheckedRunnable {
1668		protected void realRun() throws Throwable {
1669	<	Thread.sleep(SMALL_DELAY_MS);
1669	>	delay(SMALL_DELAY_MS);
1670		}
1671		}
1672
1673		public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1674		protected void realRun() {
1675		try {
1676	<	Thread.sleep(SMALL_DELAY_MS);
1676	>	delay(SMALL_DELAY_MS);
1677		} catch (InterruptedException ok) {}
1678		}
1679		}
1680
1681		public class SmallCallable extends CheckedCallable {
1682		protected Object realCall() throws InterruptedException {
1683	<	Thread.sleep(SMALL_DELAY_MS);
1683	>	delay(SMALL_DELAY_MS);
1684		return Boolean.TRUE;
1685		}
1686		}
1687
1688		public class MediumRunnable extends CheckedRunnable {
1689		protected void realRun() throws Throwable {
1690	<	Thread.sleep(MEDIUM_DELAY_MS);
1690	>	delay(MEDIUM_DELAY_MS);
1691		}
1692		}
1693
1694		public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1695		protected void realRun() throws InterruptedException {
1696	<	Thread.sleep(MEDIUM_DELAY_MS);
1696	>	delay(MEDIUM_DELAY_MS);
1697		}
1698		}
1699
1700	+	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1701	+	return new CheckedRunnable() {
1702	+	protected void realRun() {
1703	+	try {
1704	+	delay(timeoutMillis);
1705	+	} catch (InterruptedException ok) {}
1706	+	}};
1707	+	}
1708	+
1709		public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1710		protected void realRun() {
1711		try {
1712	<	Thread.sleep(MEDIUM_DELAY_MS);
1712	>	delay(MEDIUM_DELAY_MS);
1713		} catch (InterruptedException ok) {}
1714		}
1715		}
#	Line 739 | Line 1717 | public class JSR166TestCase extends Test
1717		public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1718		protected void realRun() {
1719		try {
1720	<	Thread.sleep(LONG_DELAY_MS);
1720	>	delay(LONG_DELAY_MS);
1721		} catch (InterruptedException ok) {}
1722		}
1723		}
#	Line 753 | Line 1731 | public class JSR166TestCase extends Test
1731		}
1732		}
1733
1734	+	public interface TrackedRunnable extends Runnable {
1735	+	boolean isDone();
1736	+	}
1737	+
1738	+	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1739	+	return new TrackedRunnable() {
1740	+	private volatile boolean done = false;
1741	+	public boolean isDone() { return done; }
1742	+	public void run() {
1743	+	try {
1744	+	delay(timeoutMillis);
1745	+	done = true;
1746	+	} catch (InterruptedException ok) {}
1747	+	}
1748	+	};
1749	+	}
1750	+
1751		public static class TrackedShortRunnable implements Runnable {
1752		public volatile boolean done = false;
1753		public void run() {
1754		try {
1755	<	Thread.sleep(SMALL_DELAY_MS);
1755	>	delay(SHORT_DELAY_MS);
1756	>	done = true;
1757	>	} catch (InterruptedException ok) {}
1758	>	}
1759	>	}
1760	>
1761	>	public static class TrackedSmallRunnable implements Runnable {
1762	>	public volatile boolean done = false;
1763	>	public void run() {
1764	>	try {
1765	>	delay(SMALL_DELAY_MS);
1766		done = true;
1767		} catch (InterruptedException ok) {}
1768		}
#	Line 767 | Line 1772 | public class JSR166TestCase extends Test
1772		public volatile boolean done = false;
1773		public void run() {
1774		try {
1775	<	Thread.sleep(MEDIUM_DELAY_MS);
1775	>	delay(MEDIUM_DELAY_MS);
1776		done = true;
1777		} catch (InterruptedException ok) {}
1778		}
#	Line 777 | Line 1782 | public class JSR166TestCase extends Test
1782		public volatile boolean done = false;
1783		public void run() {
1784		try {
1785	<	Thread.sleep(LONG_DELAY_MS);
1785	>	delay(LONG_DELAY_MS);
1786		done = true;
1787		} catch (InterruptedException ok) {}
1788		}
#	Line 794 | Line 1799 | public class JSR166TestCase extends Test
1799		public volatile boolean done = false;
1800		public Object call() {
1801		try {
1802	<	Thread.sleep(SMALL_DELAY_MS);
1802	>	delay(SMALL_DELAY_MS);
1803		done = true;
1804		} catch (InterruptedException ok) {}
1805		return Boolean.TRUE;
#	Line 807 | Line 1812 | public class JSR166TestCase extends Test
1812		public abstract class CheckedRecursiveAction extends RecursiveAction {
1813		protected abstract void realCompute() throws Throwable;
1814
1815	<	public final void compute() {
1815	>	@Override protected final void compute() {
1816		try {
1817		realCompute();
1818	<	} catch (Throwable t) {
1819	<	threadUnexpectedException(t);
1818	>	} catch (Throwable fail) {
1819	>	threadUnexpectedException(fail);
1820		}
1821		}
1822		}
#	Line 822 | Line 1827 | public class JSR166TestCase extends Test
1827		public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1828		protected abstract T realCompute() throws Throwable;
1829
1830	<	public final T compute() {
1830	>	@Override protected final T compute() {
1831		try {
1832		return realCompute();
1833	<	} catch (Throwable t) {
1834	<	threadUnexpectedException(t);
1833	>	} catch (Throwable fail) {
1834	>	threadUnexpectedException(fail);
1835		return null;
1836		}
1837		}
#	Line 840 | Line 1845 | public class JSR166TestCase extends Test
1845		ThreadPoolExecutor executor) {}
1846		}
1847
1848	+	/**
1849	+	* A CyclicBarrier that uses timed await and fails with
1850	+	* AssertionFailedErrors instead of throwing checked exceptions.
1851	+	*/
1852	+	public static class CheckedBarrier extends CyclicBarrier {
1853	+	public CheckedBarrier(int parties) { super(parties); }
1854	+
1855	+	public int await() {
1856	+	try {
1857	+	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1858	+	} catch (TimeoutException timedOut) {
1859	+	throw new AssertionFailedError("timed out");
1860	+	} catch (Exception fail) {
1861	+	AssertionFailedError afe =
1862	+	new AssertionFailedError("Unexpected exception: " + fail);
1863	+	afe.initCause(fail);
1864	+	throw afe;
1865	+	}
1866	+	}
1867	+	}
1868	+
1869	+	void checkEmpty(BlockingQueue q) {
1870	+	try {
1871	+	assertTrue(q.isEmpty());
1872	+	assertEquals(0, q.size());
1873	+	assertNull(q.peek());
1874	+	assertNull(q.poll());
1875	+	assertNull(q.poll(0, MILLISECONDS));
1876	+	assertEquals(q.toString(), "[]");
1877	+	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1878	+	assertFalse(q.iterator().hasNext());
1879	+	try {
1880	+	q.element();
1881	+	shouldThrow();
1882	+	} catch (NoSuchElementException success) {}
1883	+	try {
1884	+	q.iterator().next();
1885	+	shouldThrow();
1886	+	} catch (NoSuchElementException success) {}
1887	+	try {
1888	+	q.remove();
1889	+	shouldThrow();
1890	+	} catch (NoSuchElementException success) {}
1891	+	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1892	+	}
1893	+
1894	+	void assertSerialEquals(Object x, Object y) {
1895	+	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1896	+	}
1897	+
1898	+	void assertNotSerialEquals(Object x, Object y) {
1899	+	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1900	+	}
1901	+
1902	+	byte[] serialBytes(Object o) {
1903	+	try {
1904	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1905	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1906	+	oos.writeObject(o);
1907	+	oos.flush();
1908	+	oos.close();
1909	+	return bos.toByteArray();
1910	+	} catch (Throwable fail) {
1911	+	threadUnexpectedException(fail);
1912	+	return new byte[0];
1913	+	}
1914	+	}
1915	+
1916	+	void assertImmutable(final Object o) {
1917	+	if (o instanceof Collection) {
1918	+	assertThrows(
1919	+	UnsupportedOperationException.class,
1920	+	new Runnable() { public void run() {
1921	+	((Collection) o).add(null);}});
1922	+	}
1923	+	}
1924	+
1925	+	@SuppressWarnings("unchecked")
1926	+	<T> T serialClone(T o) {
1927	+	try {
1928	+	ObjectInputStream ois = new ObjectInputStream
1929	+	(new ByteArrayInputStream(serialBytes(o)));
1930	+	T clone = (T) ois.readObject();
1931	+	if (o == clone) assertImmutable(o);
1932	+	assertSame(o.getClass(), clone.getClass());
1933	+	return clone;
1934	+	} catch (Throwable fail) {
1935	+	threadUnexpectedException(fail);
1936	+	return null;
1937	+	}
1938	+	}
1939	+
1940	+	/**
1941	+	* A version of serialClone that leaves error handling (for
1942	+	* e.g. NotSerializableException) up to the caller.
1943	+	*/
1944	+	@SuppressWarnings("unchecked")
1945	+	<T> T serialClonePossiblyFailing(T o)
1946	+	throws ReflectiveOperationException, java.io.IOException {
1947	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1948	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1949	+	oos.writeObject(o);
1950	+	oos.flush();
1951	+	oos.close();
1952	+	ObjectInputStream ois = new ObjectInputStream
1953	+	(new ByteArrayInputStream(bos.toByteArray()));
1954	+	T clone = (T) ois.readObject();
1955	+	if (o == clone) assertImmutable(o);
1956	+	assertSame(o.getClass(), clone.getClass());
1957	+	return clone;
1958	+	}
1959	+
1960	+	/**
1961	+	* If o implements Cloneable and has a public clone method,
1962	+	* returns a clone of o, else null.
1963	+	*/
1964	+	@SuppressWarnings("unchecked")
1965	+	<T> T cloneableClone(T o) {
1966	+	if (!(o instanceof Cloneable)) return null;
1967	+	final T clone;
1968	+	try {
1969	+	clone = (T) o.getClass().getMethod("clone").invoke(o);
1970	+	} catch (NoSuchMethodException ok) {
1971	+	return null;
1972	+	} catch (ReflectiveOperationException unexpected) {
1973	+	throw new Error(unexpected);
1974	+	}
1975	+	assertNotSame(o, clone); // not 100% guaranteed by spec
1976	+	assertSame(o.getClass(), clone.getClass());
1977	+	return clone;
1978	+	}
1979	+
1980	+	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1981	+	Runnable... throwingActions) {
1982	+	for (Runnable throwingAction : throwingActions) {
1983	+	boolean threw = false;
1984	+	try { throwingAction.run(); }
1985	+	catch (Throwable t) {
1986	+	threw = true;
1987	+	if (!expectedExceptionClass.isInstance(t)) {
1988	+	AssertionFailedError afe =
1989	+	new AssertionFailedError
1990	+	("Expected " + expectedExceptionClass.getName() +
1991	+	", got " + t.getClass().getName());
1992	+	afe.initCause(t);
1993	+	threadUnexpectedException(afe);
1994	+	}
1995	+	}
1996	+	if (!threw)
1997	+	shouldThrow(expectedExceptionClass.getName());
1998	+	}
1999	+	}
2000	+
2001	+	public void assertIteratorExhausted(Iterator<?> it) {
2002	+	try {
2003	+	it.next();
2004	+	shouldThrow();
2005	+	} catch (NoSuchElementException success) {}
2006	+	assertFalse(it.hasNext());
2007	+	}
2008	+
2009	+	public <T> Callable<T> callableThrowing(final Exception ex) {
2010	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
2011	+	}
2012	+
2013	+	public Runnable runnableThrowing(final RuntimeException ex) {
2014	+	return new Runnable() { public void run() { throw ex; }};
2015	+	}
2016	+
2017	+	/** A reusable thread pool to be shared by tests. */
2018	+	static final ExecutorService cachedThreadPool =
2019	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
2020	+	1000L, MILLISECONDS,
2021	+	new SynchronousQueue<Runnable>());
2022	+
2023	+	static <T> void shuffle(T[] array) {
2024	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
2025	+	}
2026		}

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