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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.2 by dl, Sat Sep 20 00:31:57 2003 UTC vs.
Revision 1.220 by jsr166, Sat Mar 11 17:33:32 2017 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
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/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.*;
11	<	import java.util.concurrent.*;
12	<	import java.io.*;
9	>	/*
10	>	* @test
11	>	* @summary JSR-166 tck tests (conformance testing mode)
12	>	* @build *
13	>	* @modules java.management
14	>	* @run junit/othervm/timeout=1000 JSR166TestCase
15	>	*/
16	>
17	>	/*
18	>	* @test
19	>	* @summary JSR-166 tck tests (whitebox tests allowed)
20	>	* @build *
21	>	* @modules java.base/java.util.concurrent:open
22	>	*          java.base/java.lang:open
23	>	*          java.management
24	>	* @run junit/othervm/timeout=1000
25	>	*      -Djsr166.testImplementationDetails=true
26	>	*      JSR166TestCase
27	>	* @run junit/othervm/timeout=1000
28	>	*      -Djsr166.testImplementationDetails=true
29	>	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=0
30	>	*      JSR166TestCase
31	>	* @run junit/othervm/timeout=1000
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	>	*      -Djsr166.testImplementationDetails=true
38	>	*      JSR166TestCase
39	>	*/
40
41	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
42	+	import static java.util.concurrent.TimeUnit.MINUTES;
43	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
44	+
45	+	import java.io.ByteArrayInputStream;
46	+	import java.io.ByteArrayOutputStream;
47	+	import java.io.ObjectInputStream;
48	+	import java.io.ObjectOutputStream;
49	+	import java.lang.management.ManagementFactory;
50	+	import java.lang.management.ThreadInfo;
51	+	import java.lang.management.ThreadMXBean;
52	+	import java.lang.reflect.Constructor;
53	+	import java.lang.reflect.Method;
54	+	import java.lang.reflect.Modifier;
55	+	import java.security.CodeSource;
56	+	import java.security.Permission;
57	+	import java.security.PermissionCollection;
58	+	import java.security.Permissions;
59	+	import java.security.Policy;
60	+	import java.security.ProtectionDomain;
61	+	import java.security.SecurityPermission;
62	+	import java.util.ArrayList;
63	+	import java.util.Arrays;
64	+	import java.util.Collection;
65	+	import java.util.Collections;
66	+	import java.util.Date;
67	+	import java.util.Enumeration;
68	+	import java.util.Iterator;
69	+	import java.util.List;
70	+	import java.util.NoSuchElementException;
71	+	import java.util.PropertyPermission;
72	+	import java.util.concurrent.BlockingQueue;
73	+	import java.util.concurrent.Callable;
74	+	import java.util.concurrent.CountDownLatch;
75	+	import java.util.concurrent.CyclicBarrier;
76	+	import java.util.concurrent.ExecutionException;
77	+	import java.util.concurrent.Executors;
78	+	import java.util.concurrent.ExecutorService;
79	+	import java.util.concurrent.ForkJoinPool;
80	+	import java.util.concurrent.Future;
81	+	import java.util.concurrent.RecursiveAction;
82	+	import java.util.concurrent.RecursiveTask;
83	+	import java.util.concurrent.RejectedExecutionHandler;
84	+	import java.util.concurrent.Semaphore;
85	+	import java.util.concurrent.SynchronousQueue;
86	+	import java.util.concurrent.ThreadFactory;
87	+	import java.util.concurrent.ThreadLocalRandom;
88	+	import java.util.concurrent.ThreadPoolExecutor;
89	+	import java.util.concurrent.TimeoutException;
90	+	import java.util.concurrent.atomic.AtomicBoolean;
91	+	import java.util.concurrent.atomic.AtomicReference;
92	+	import java.util.regex.Pattern;
93	+
94	+	import junit.framework.AssertionFailedError;
95	+	import junit.framework.Test;
96	+	import junit.framework.TestCase;
97	+	import junit.framework.TestResult;
98	+	import junit.framework.TestSuite;
99
100		/**
101	<	* Base class for JSR166 Junit TCK tests.  Defines some constants and
102	<	* utility methods, as well as a simple framework for helping to make
103	<	* sure that assertions failing in generated threads cause the
104	<	* associated test that generated them to itself fail (which JUnit doe
105	<	* not otherwise arrange).  The rules for creating such tests are:
101	>	* Base class for JSR166 Junit TCK tests.  Defines some constants,
102	>	* utility methods and classes, as well as a simple framework for
103	>	* helping to make sure that assertions failing in generated threads
104	>	* cause the associated test that generated them to itself fail (which
105	>	* JUnit does not otherwise arrange).  The rules for creating such
106	>	* tests are:
107		*
108		* <ol>
109		*
110	<	* <li> All assertions in code running in generated threads must use
111	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
112	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
113	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
110	>	* <li>All assertions in code running in generated threads must use
111	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
112	>	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
113	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
114		* particularly recommended) for other code to use these forms too.
115		* Only the most typically used JUnit assertion methods are defined
116	<	* this way, but enough to live with.</li>
116	>	* this way, but enough to live with.
117		*
118	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
119	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
118	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
119	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
120		* them. These methods are used to clear and check for thread
121	<	* assertion failures.</li>
121	>	* assertion failures.
122		*
123	<	* <li>All delays and timeouts must use one of the constants {@link
124	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
125	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
126	<	* discriminatable from zero time, and always allows enough time for
127	<	* the small amounts of computation (creating a thread, calling a few
123	>	* <li>All delays and timeouts must use one of the constants {@code
124	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
125	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
126	>	* discriminable from zero time, and always allows enough time for the
127	>	* small amounts of computation (creating a thread, calling a few
128		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
129		* is always discriminable as larger than SHORT and smaller than
130		* MEDIUM.  And so on. These constants are set to conservative values,
131		* but even so, if there is ever any doubt, they can all be increased
132	<	* in one spot to rerun tests on slower platforms</li>
132	>	* in one spot to rerun tests on slower platforms.
133		*
134	<	* <li> All threads generated must be joined inside each test case
135	<	* method (or <tt>fail</tt> to do so) before returning from the
136	<	* method. The {@link joinPool} method can be used to do this when
137	<	* using Executors.</li>
134	>	* <li>All threads generated must be joined inside each test case
135	>	* method (or {@code fail} to do so) before returning from the
136	>	* method. The {@code joinPool} method can be used to do this when
137	>	* using Executors.
138		*
139		* </ol>
140	+	*
141	+	* <p><b>Other notes</b>
142	+	* <ul>
143	+	*
144	+	* <li>Usually, there is one testcase method per JSR166 method
145	+	* covering "normal" operation, and then as many exception-testing
146	+	* methods as there are exceptions the method can throw. Sometimes
147	+	* there are multiple tests per JSR166 method when the different
148	+	* "normal" behaviors differ significantly. And sometimes testcases
149	+	* cover multiple methods when they cannot be tested in isolation.
150	+	*
151	+	* <li>The documentation style for testcases is to provide as javadoc
152	+	* a simple sentence or two describing the property that the testcase
153	+	* method purports to test. The javadocs do not say anything about how
154	+	* the property is tested. To find out, read the code.
155	+	*
156	+	* <li>These tests are "conformance tests", and do not attempt to
157	+	* test throughput, latency, scalability or other performance factors
158	+	* (see the separate "jtreg" tests for a set intended to check these
159	+	* for the most central aspects of functionality.) So, most tests use
160	+	* the smallest sensible numbers of threads, collection sizes, etc
161	+	* needed to check basic conformance.
162	+	*
163	+	* <li>The test classes currently do not declare inclusion in
164	+	* any particular package to simplify things for people integrating
165	+	* them in TCK test suites.
166	+	*
167	+	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
168	+	* runs all JSR166 unit tests.
169	+	*
170	+	* </ul>
171		*/
172		public class JSR166TestCase extends TestCase {
173	+	private static final boolean useSecurityManager =
174	+	Boolean.getBoolean("jsr166.useSecurityManager");
175	+
176	+	protected static final boolean expensiveTests =
177	+	Boolean.getBoolean("jsr166.expensiveTests");
178	+
179	+	/**
180	+	* If true, also run tests that are not part of the official tck
181	+	* because they test unspecified implementation details.
182	+	*/
183	+	protected static final boolean testImplementationDetails =
184	+	Boolean.getBoolean("jsr166.testImplementationDetails");
185	+
186	+	/**
187	+	* If true, report on stdout all "slow" tests, that is, ones that
188	+	* take more than profileThreshold milliseconds to execute.
189	+	*/
190	+	private static final boolean profileTests =
191	+	Boolean.getBoolean("jsr166.profileTests");
192	+
193	+	/**
194	+	* The number of milliseconds that tests are permitted for
195	+	* execution without being reported, when profileTests is set.
196	+	*/
197	+	private static final long profileThreshold =
198	+	Long.getLong("jsr166.profileThreshold", 100);
199	+
200	+	/**
201	+	* The number of repetitions per test (for tickling rare bugs).
202	+	*/
203	+	private static final int runsPerTest =
204	+	Integer.getInteger("jsr166.runsPerTest", 1);
205	+
206	+	/**
207	+	* The number of repetitions of the test suite (for finding leaks?).
208	+	*/
209	+	private static final int suiteRuns =
210	+	Integer.getInteger("jsr166.suiteRuns", 1);
211	+
212	+	/**
213	+	* Returns the value of the system property, or NaN if not defined.
214	+	*/
215	+	private static float systemPropertyValue(String name) {
216	+	String floatString = System.getProperty(name);
217	+	if (floatString == null)
218	+	return Float.NaN;
219	+	try {
220	+	return Float.parseFloat(floatString);
221	+	} catch (NumberFormatException ex) {
222	+	throw new IllegalArgumentException(
223	+	String.format("Bad float value in system property %s=%s",
224	+	name, floatString));
225	+	}
226	+	}
227	+
228	+	/**
229	+	* The scaling factor to apply to standard delays used in tests.
230	+	* May be initialized from any of:
231	+	* - the "jsr166.delay.factor" system property
232	+	* - the "test.timeout.factor" system property (as used by jtreg)
233	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
234	+	* - hard-coded fuzz factor when using a known slowpoke VM
235	+	*/
236	+	private static final float delayFactor = delayFactor();
237	+
238	+	private static float delayFactor() {
239	+	float x;
240	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
241	+	return x;
242	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
243	+	return x;
244	+	String prop = System.getProperty("java.vm.version");
245	+	if (prop != null && prop.matches(".*debug.*"))
246	+	return 4.0f; // How much slower is fastdebug than product?!
247	+	return 1.0f;
248	+	}
249	+
250	+	public JSR166TestCase() { super(); }
251	+	public JSR166TestCase(String name) { super(name); }
252	+
253	+	/**
254	+	* A filter for tests to run, matching strings of the form
255	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
256	+	* Usefully combined with jsr166.runsPerTest.
257	+	*/
258	+	private static final Pattern methodFilter = methodFilter();
259	+
260	+	private static Pattern methodFilter() {
261	+	String regex = System.getProperty("jsr166.methodFilter");
262	+	return (regex == null) ? null : Pattern.compile(regex);
263	+	}
264	+
265	+	// Instrumentation to debug very rare, but very annoying hung test runs.
266	+	static volatile TestCase currentTestCase;
267	+	// static volatile int currentRun = 0;
268	+	static {
269	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
270	+	// Avoid spurious reports with enormous runsPerTest.
271	+	// A single test case run should never take more than 1 second.
272	+	// But let's cap it at the high end too ...
273	+	final int timeoutMinutes =
274	+	Math.min(15, Math.max(runsPerTest / 60, 1));
275	+	for (TestCase lastTestCase = currentTestCase;;) {
276	+	try { MINUTES.sleep(timeoutMinutes); }
277	+	catch (InterruptedException unexpected) { break; }
278	+	if (lastTestCase == currentTestCase) {
279	+	System.err.printf(
280	+	"Looks like we're stuck running test: %s%n",
281	+	lastTestCase);
282	+	//                     System.err.printf(
283	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
284	+	//                         lastTestCase, currentRun, runsPerTest);
285	+	//                     System.err.println("availableProcessors=" +
286	+	//                         Runtime.getRuntime().availableProcessors());
287	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
288	+	dumpTestThreads();
289	+	// one stack dump is probably enough; more would be spam
290	+	break;
291	+	}
292	+	lastTestCase = currentTestCase;
293	+	}}};
294	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
295	+	thread.setDaemon(true);
296	+	thread.start();
297	+	}
298	+
299	+	//     public static String cpuModel() {
300	+	//         try {
301	+	//             java.util.regex.Matcher matcher
302	+	//               = Pattern.compile("model name\\s*: (.*)")
303	+	//                 .matcher(new String(
304	+	//                     java.nio.file.Files.readAllBytes(
305	+	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
306	+	//             matcher.find();
307	+	//             return matcher.group(1);
308	+	//         } catch (Exception ex) { return null; }
309	+	//     }
310	+
311	+	public void runBare() throws Throwable {
312	+	currentTestCase = this;
313	+	if (methodFilter == null
314	+	|| methodFilter.matcher(toString()).find())
315	+	super.runBare();
316	+	}
317	+
318	+	protected void runTest() throws Throwable {
319	+	for (int i = 0; i < runsPerTest; i++) {
320	+	// currentRun = i;
321	+	if (profileTests)
322	+	runTestProfiled();
323	+	else
324	+	super.runTest();
325	+	}
326	+	}
327	+
328	+	protected void runTestProfiled() throws Throwable {
329	+	for (int i = 0; i < 2; i++) {
330	+	long startTime = System.nanoTime();
331	+	super.runTest();
332	+	long elapsedMillis = millisElapsedSince(startTime);
333	+	if (elapsedMillis < profileThreshold)
334	+	break;
335	+	// Never report first run of any test; treat it as a
336	+	// warmup run, notably to trigger all needed classloading,
337	+	if (i > 0)
338	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
339	+	}
340	+	}
341	+
342	+	/**
343	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
344	+	*/
345	+	public static void main(String[] args) {
346	+	main(suite(), args);
347	+	}
348	+
349	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
350	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
351	+	long runTime;
352	+	public void startTest(Test test) {}
353	+	protected void printHeader(long runTime) {
354	+	this.runTime = runTime; // defer printing for later
355	+	}
356	+	protected void printFooter(TestResult result) {
357	+	if (result.wasSuccessful()) {
358	+	getWriter().println("OK (" + result.runCount() + " tests)"
359	+	+ "  Time: " + elapsedTimeAsString(runTime));
360	+	} else {
361	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
362	+	super.printFooter(result);
363	+	}
364	+	}
365	+	}
366	+
367	+	/**
368	+	* Returns a TestRunner that doesn't bother with unnecessary
369	+	* fluff, like printing a "." for each test case.
370	+	*/
371	+	static junit.textui.TestRunner newPithyTestRunner() {
372	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
373	+	runner.setPrinter(new PithyResultPrinter(System.out));
374	+	return runner;
375	+	}
376	+
377	+	/**
378	+	* Runs all unit tests in the given test suite.
379	+	* Actual behavior influenced by jsr166.* system properties.
380	+	*/
381	+	static void main(Test suite, String[] args) {
382	+	if (useSecurityManager) {
383	+	System.err.println("Setting a permissive security manager");
384	+	Policy.setPolicy(permissivePolicy());
385	+	System.setSecurityManager(new SecurityManager());
386	+	}
387	+	for (int i = 0; i < suiteRuns; i++) {
388	+	TestResult result = newPithyTestRunner().doRun(suite);
389	+	if (!result.wasSuccessful())
390	+	System.exit(1);
391	+	System.gc();
392	+	System.runFinalization();
393	+	}
394	+	}
395	+
396	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
397	+	TestSuite suite = new TestSuite();
398	+	for (Object suiteOrClass : suiteOrClasses) {
399	+	if (suiteOrClass instanceof TestSuite)
400	+	suite.addTest((TestSuite) suiteOrClass);
401	+	else if (suiteOrClass instanceof Class)
402	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
403	+	else
404	+	throw new ClassCastException("not a test suite or class");
405	+	}
406	+	return suite;
407	+	}
408	+
409	+	public static void addNamedTestClasses(TestSuite suite,
410	+	String... testClassNames) {
411	+	for (String testClassName : testClassNames) {
412	+	try {
413	+	Class<?> testClass = Class.forName(testClassName);
414	+	Method m = testClass.getDeclaredMethod("suite",
415	+	new Class<?>[0]);
416	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
417	+	} catch (Exception e) {
418	+	throw new Error("Missing test class", e);
419	+	}
420	+	}
421	+	}
422	+
423	+	public static final double JAVA_CLASS_VERSION;
424	+	public static final String JAVA_SPECIFICATION_VERSION;
425	+	static {
426	+	try {
427	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
428	+	new java.security.PrivilegedAction<Double>() {
429	+	public Double run() {
430	+	return Double.valueOf(System.getProperty("java.class.version"));}});
431	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
432	+	new java.security.PrivilegedAction<String>() {
433	+	public String run() {
434	+	return System.getProperty("java.specification.version");}});
435	+	} catch (Throwable t) {
436	+	throw new Error(t);
437	+	}
438	+	}
439	+
440	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
441	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
442	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
443	+	public static boolean atLeastJava9() {
444	+	return JAVA_CLASS_VERSION >= 53.0
445	+	// As of 2015-09, java9 still uses 52.0 class file version
446	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
447	+	}
448	+	public static boolean atLeastJava10() {
449	+	return JAVA_CLASS_VERSION >= 54.0
450	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
451	+	}
452	+
453	+	/**
454	+	* Collects all JSR166 unit tests as one suite.
455	+	*/
456	+	public static Test suite() {
457	+	// Java7+ test classes
458	+	TestSuite suite = newTestSuite(
459	+	ForkJoinPoolTest.suite(),
460	+	ForkJoinTaskTest.suite(),
461	+	RecursiveActionTest.suite(),
462	+	RecursiveTaskTest.suite(),
463	+	LinkedTransferQueueTest.suite(),
464	+	PhaserTest.suite(),
465	+	ThreadLocalRandomTest.suite(),
466	+	AbstractExecutorServiceTest.suite(),
467	+	AbstractQueueTest.suite(),
468	+	AbstractQueuedSynchronizerTest.suite(),
469	+	AbstractQueuedLongSynchronizerTest.suite(),
470	+	ArrayBlockingQueueTest.suite(),
471	+	ArrayDequeTest.suite(),
472	+	ArrayListTest.suite(),
473	+	AtomicBooleanTest.suite(),
474	+	AtomicIntegerArrayTest.suite(),
475	+	AtomicIntegerFieldUpdaterTest.suite(),
476	+	AtomicIntegerTest.suite(),
477	+	AtomicLongArrayTest.suite(),
478	+	AtomicLongFieldUpdaterTest.suite(),
479	+	AtomicLongTest.suite(),
480	+	AtomicMarkableReferenceTest.suite(),
481	+	AtomicReferenceArrayTest.suite(),
482	+	AtomicReferenceFieldUpdaterTest.suite(),
483	+	AtomicReferenceTest.suite(),
484	+	AtomicStampedReferenceTest.suite(),
485	+	ConcurrentHashMapTest.suite(),
486	+	ConcurrentLinkedDequeTest.suite(),
487	+	ConcurrentLinkedQueueTest.suite(),
488	+	ConcurrentSkipListMapTest.suite(),
489	+	ConcurrentSkipListSubMapTest.suite(),
490	+	ConcurrentSkipListSetTest.suite(),
491	+	ConcurrentSkipListSubSetTest.suite(),
492	+	CopyOnWriteArrayListTest.suite(),
493	+	CopyOnWriteArraySetTest.suite(),
494	+	CountDownLatchTest.suite(),
495	+	CountedCompleterTest.suite(),
496	+	CyclicBarrierTest.suite(),
497	+	DelayQueueTest.suite(),
498	+	EntryTest.suite(),
499	+	ExchangerTest.suite(),
500	+	ExecutorsTest.suite(),
501	+	ExecutorCompletionServiceTest.suite(),
502	+	FutureTaskTest.suite(),
503	+	LinkedBlockingDequeTest.suite(),
504	+	LinkedBlockingQueueTest.suite(),
505	+	LinkedListTest.suite(),
506	+	LockSupportTest.suite(),
507	+	PriorityBlockingQueueTest.suite(),
508	+	PriorityQueueTest.suite(),
509	+	ReentrantLockTest.suite(),
510	+	ReentrantReadWriteLockTest.suite(),
511	+	ScheduledExecutorTest.suite(),
512	+	ScheduledExecutorSubclassTest.suite(),
513	+	SemaphoreTest.suite(),
514	+	SynchronousQueueTest.suite(),
515	+	SystemTest.suite(),
516	+	ThreadLocalTest.suite(),
517	+	ThreadPoolExecutorTest.suite(),
518	+	ThreadPoolExecutorSubclassTest.suite(),
519	+	ThreadTest.suite(),
520	+	TimeUnitTest.suite(),
521	+	TreeMapTest.suite(),
522	+	TreeSetTest.suite(),
523	+	TreeSubMapTest.suite(),
524	+	TreeSubSetTest.suite(),
525	+	VectorTest.suite());
526	+
527	+	// Java8+ test classes
528	+	if (atLeastJava8()) {
529	+	String[] java8TestClassNames = {
530	+	"ArrayDeque8Test",
531	+	"Atomic8Test",
532	+	"CompletableFutureTest",
533	+	"ConcurrentHashMap8Test",
534	+	"CountedCompleter8Test",
535	+	"DoubleAccumulatorTest",
536	+	"DoubleAdderTest",
537	+	"ForkJoinPool8Test",
538	+	"ForkJoinTask8Test",
539	+	"LinkedBlockingDeque8Test",
540	+	"LinkedBlockingQueue8Test",
541	+	"LongAccumulatorTest",
542	+	"LongAdderTest",
543	+	"SplittableRandomTest",
544	+	"StampedLockTest",
545	+	"SubmissionPublisherTest",
546	+	"ThreadLocalRandom8Test",
547	+	"TimeUnit8Test",
548	+	};
549	+	addNamedTestClasses(suite, java8TestClassNames);
550	+	}
551	+
552	+	// Java9+ test classes
553	+	if (atLeastJava9()) {
554	+	String[] java9TestClassNames = {
555	+	"AtomicBoolean9Test",
556	+	"AtomicInteger9Test",
557	+	"AtomicIntegerArray9Test",
558	+	"AtomicLong9Test",
559	+	"AtomicLongArray9Test",
560	+	"AtomicReference9Test",
561	+	"AtomicReferenceArray9Test",
562	+	"ExecutorCompletionService9Test",
563	+	"ForkJoinPool9Test",
564	+	};
565	+	addNamedTestClasses(suite, java9TestClassNames);
566	+	}
567	+
568	+	return suite;
569	+	}
570	+
571	+	/** Returns list of junit-style test method names in given class. */
572	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
573	+	Method[] methods = testClass.getDeclaredMethods();
574	+	ArrayList<String> names = new ArrayList<>(methods.length);
575	+	for (Method method : methods) {
576	+	if (method.getName().startsWith("test")
577	+	&& Modifier.isPublic(method.getModifiers())
578	+	// method.getParameterCount() requires jdk8+
579	+	&& method.getParameterTypes().length == 0) {
580	+	names.add(method.getName());
581	+	}
582	+	}
583	+	return names;
584	+	}
585	+
586	+	/**
587	+	* Returns junit-style testSuite for the given test class, but
588	+	* parameterized by passing extra data to each test.
589	+	*/
590	+	public static <ExtraData> Test parameterizedTestSuite
591	+	(Class<? extends JSR166TestCase> testClass,
592	+	Class<ExtraData> dataClass,
593	+	ExtraData data) {
594	+	try {
595	+	TestSuite suite = new TestSuite();
596	+	Constructor c =
597	+	testClass.getDeclaredConstructor(dataClass, String.class);
598	+	for (String methodName : testMethodNames(testClass))
599	+	suite.addTest((Test) c.newInstance(data, methodName));
600	+	return suite;
601	+	} catch (Exception e) {
602	+	throw new Error(e);
603	+	}
604	+	}
605	+
606	+	/**
607	+	* Returns junit-style testSuite for the jdk8 extension of the
608	+	* given test class, but parameterized by passing extra data to
609	+	* each test.  Uses reflection to allow compilation in jdk7.
610	+	*/
611	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
612	+	(Class<? extends JSR166TestCase> testClass,
613	+	Class<ExtraData> dataClass,
614	+	ExtraData data) {
615	+	if (atLeastJava8()) {
616	+	String name = testClass.getName();
617	+	String name8 = name.replaceAll("Test$", "8Test");
618	+	if (name.equals(name8)) throw new Error(name);
619	+	try {
620	+	return (Test)
621	+	Class.forName(name8)
622	+	.getMethod("testSuite", new Class[] { dataClass })
623	+	.invoke(null, data);
624	+	} catch (Exception e) {
625	+	throw new Error(e);
626	+	}
627	+	} else {
628	+	return new TestSuite();
629	+	}
630	+	}
631	+
632	+	// Delays for timing-dependent tests, in milliseconds.
633
634		public static long SHORT_DELAY_MS;
635		public static long SMALL_DELAY_MS;
636		public static long MEDIUM_DELAY_MS;
637		public static long LONG_DELAY_MS;
638
61	–
639		/**
640	<	* Return the shortest timed delay. This could
641	<	* be reimplmented to use for example a Property.
642	<	*/
640	>	* Returns the shortest timed delay. This can be scaled up for
641	>	* slow machines using the jsr166.delay.factor system property,
642	>	* or via jtreg's -timeoutFactor: flag.
643	>	* http://openjdk.java.net/jtreg/command-help.html
644	>	*/
645		protected long getShortDelay() {
646	<	return 50;
646	>	return (long) (50 * delayFactor);
647		}
648
70	–
649		/**
650	<	* Set delays as multiples fo SHORT_DELAY.
650	>	* Sets delays as multiples of SHORT_DELAY.
651		*/
652	<	protected  void setDelays() {
652	>	protected void setDelays() {
653		SHORT_DELAY_MS = getShortDelay();
654	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
654	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
655		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
656	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
656	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
657	>	}
658	>
659	>	/**
660	>	* Returns a timeout in milliseconds to be used in tests that
661	>	* verify that operations block or time out.
662	>	*/
663	>	long timeoutMillis() {
664	>	return SHORT_DELAY_MS / 4;
665	>	}
666	>
667	>	/**
668	>	* Returns a new Date instance representing a time at least
669	>	* delayMillis milliseconds in the future.
670	>	*/
671	>	Date delayedDate(long delayMillis) {
672	>	// Add 1 because currentTimeMillis is known to round into the past.
673	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
674		}
675
676		/**
677	<	* Flag set true if any threadAssert methods fail
677	>	* The first exception encountered if any threadAssertXXX method fails.
678		*/
679	<	protected volatile boolean threadFailed;
679	>	private final AtomicReference<Throwable> threadFailure
680	>	= new AtomicReference<>(null);
681
682		/**
683	<	* Initialize test to indicat that no thread assertions have failed
683	>	* Records an exception so that it can be rethrown later in the test
684	>	* harness thread, triggering a test case failure.  Only the first
685	>	* failure is recorded; subsequent calls to this method from within
686	>	* the same test have no effect.
687		*/
688	<	public void setUp() {
688	>	public void threadRecordFailure(Throwable t) {
689	>	System.err.println(t);
690	>	dumpTestThreads();
691	>	threadFailure.compareAndSet(null, t);
692	>	}
693	>
694	>	public void setUp() {
695		setDelays();
696	<	threadFailed = false;
696	>	}
697	>
698	>	void tearDownFail(String format, Object... args) {
699	>	String msg = toString() + ": " + String.format(format, args);
700	>	System.err.println(msg);
701	>	dumpTestThreads();
702	>	throw new AssertionFailedError(msg);
703	>	}
704	>
705	>	/**
706	>	* Extra checks that get done for all test cases.
707	>	*
708	>	* Triggers test case failure if any thread assertions have failed,
709	>	* by rethrowing, in the test harness thread, any exception recorded
710	>	* earlier by threadRecordFailure.
711	>	*
712	>	* Triggers test case failure if interrupt status is set in the main thread.
713	>	*/
714	>	public void tearDown() throws Exception {
715	>	Throwable t = threadFailure.getAndSet(null);
716	>	if (t != null) {
717	>	if (t instanceof Error)
718	>	throw (Error) t;
719	>	else if (t instanceof RuntimeException)
720	>	throw (RuntimeException) t;
721	>	else if (t instanceof Exception)
722	>	throw (Exception) t;
723	>	else {
724	>	AssertionFailedError afe =
725	>	new AssertionFailedError(t.toString());
726	>	afe.initCause(t);
727	>	throw afe;
728	>	}
729	>	}
730	>
731	>	if (Thread.interrupted())
732	>	tearDownFail("interrupt status set in main thread");
733	>
734	>	checkForkJoinPoolThreadLeaks();
735		}
736
737		/**
738	<	* Trigger test case failure if any thread assertions have failed
738	>	* Finds missing PoolCleaners
739		*/
740	<	public void tearDown() {
741	<	assertFalse(threadFailed);
740	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
741	>	Thread[] survivors = new Thread[7];
742	>	int count = Thread.enumerate(survivors);
743	>	for (int i = 0; i < count; i++) {
744	>	Thread thread = survivors[i];
745	>	String name = thread.getName();
746	>	if (name.startsWith("ForkJoinPool-")) {
747	>	// give thread some time to terminate
748	>	thread.join(LONG_DELAY_MS);
749	>	if (thread.isAlive())
750	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
751	>	thread);
752	>	}
753	>	}
754	>
755	>	if (!ForkJoinPool.commonPool()
756	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
757	>	tearDownFail("ForkJoin common pool thread stuck");
758		}
759
760	+	/**
761	+	* Just like fail(reason), but additionally recording (using
762	+	* threadRecordFailure) any AssertionFailedError thrown, so that
763	+	* the current testcase will fail.
764	+	*/
765		public void threadFail(String reason) {
766	<	threadFailed = true;
767	<	fail(reason);
766	>	try {
767	>	fail(reason);
768	>	} catch (AssertionFailedError t) {
769	>	threadRecordFailure(t);
770	>	throw t;
771	>	}
772		}
773
774	+	/**
775	+	* Just like assertTrue(b), but additionally recording (using
776	+	* threadRecordFailure) any AssertionFailedError thrown, so that
777	+	* the current testcase will fail.
778	+	*/
779		public void threadAssertTrue(boolean b) {
780	<	if (!b) {
108	<	threadFailed = true;
780	>	try {
781		assertTrue(b);
782	+	} catch (AssertionFailedError t) {
783	+	threadRecordFailure(t);
784	+	throw t;
785		}
786		}
787	+
788	+	/**
789	+	* Just like assertFalse(b), but additionally recording (using
790	+	* threadRecordFailure) any AssertionFailedError thrown, so that
791	+	* the current testcase will fail.
792	+	*/
793		public void threadAssertFalse(boolean b) {
794	<	if (b) {
114	<	threadFailed = true;
794	>	try {
795		assertFalse(b);
796	+	} catch (AssertionFailedError t) {
797	+	threadRecordFailure(t);
798	+	throw t;
799		}
800		}
801	+
802	+	/**
803	+	* Just like assertNull(x), but additionally recording (using
804	+	* threadRecordFailure) any AssertionFailedError thrown, so that
805	+	* the current testcase will fail.
806	+	*/
807		public void threadAssertNull(Object x) {
808	<	if (x != null) {
120	<	threadFailed = true;
808	>	try {
809		assertNull(x);
810	+	} catch (AssertionFailedError t) {
811	+	threadRecordFailure(t);
812	+	throw t;
813		}
814		}
815	+
816	+	/**
817	+	* Just like assertEquals(x, y), but additionally recording (using
818	+	* threadRecordFailure) any AssertionFailedError thrown, so that
819	+	* the current testcase will fail.
820	+	*/
821		public void threadAssertEquals(long x, long y) {
822	<	if (x != y) {
126	<	threadFailed = true;
822	>	try {
823		assertEquals(x, y);
824	+	} catch (AssertionFailedError t) {
825	+	threadRecordFailure(t);
826	+	throw t;
827		}
828		}
829	+
830	+	/**
831	+	* Just like assertEquals(x, y), but additionally recording (using
832	+	* threadRecordFailure) any AssertionFailedError thrown, so that
833	+	* the current testcase will fail.
834	+	*/
835		public void threadAssertEquals(Object x, Object y) {
836	<	if (x != y && (x == null || !x.equals(y))) {
132	<	threadFailed = true;
836	>	try {
837		assertEquals(x, y);
838	+	} catch (AssertionFailedError fail) {
839	+	threadRecordFailure(fail);
840	+	throw fail;
841	+	} catch (Throwable fail) {
842	+	threadUnexpectedException(fail);
843		}
844		}
845
846		/**
847	<	* Wait out termination of a thread pool or fail doing so
847	>	* Just like assertSame(x, y), but additionally recording (using
848	>	* threadRecordFailure) any AssertionFailedError thrown, so that
849	>	* the current testcase will fail.
850		*/
851	<	public void joinPool(ExecutorService exec) {
851	>	public void threadAssertSame(Object x, Object y) {
852		try {
853	<	exec.shutdown();
854	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
855	<	} catch(InterruptedException ie) {
856	<	fail("unexpected exception");
853	>	assertSame(x, y);
854	>	} catch (AssertionFailedError fail) {
855	>	threadRecordFailure(fail);
856	>	throw fail;
857		}
858		}
859
860	+	/**
861	+	* Calls threadFail with message "should throw exception".
862	+	*/
863	+	public void threadShouldThrow() {
864	+	threadFail("should throw exception");
865	+	}
866
867	+	/**
868	+	* Calls threadFail with message "should throw" + exceptionName.
869	+	*/
870	+	public void threadShouldThrow(String exceptionName) {
871	+	threadFail("should throw " + exceptionName);
872	+	}
873	+
874	+	/**
875	+	* Records the given exception using {@link #threadRecordFailure},
876	+	* then rethrows the exception, wrapping it in an
877	+	* AssertionFailedError if necessary.
878	+	*/
879	+	public void threadUnexpectedException(Throwable t) {
880	+	threadRecordFailure(t);
881	+	t.printStackTrace();
882	+	if (t instanceof RuntimeException)
883	+	throw (RuntimeException) t;
884	+	else if (t instanceof Error)
885	+	throw (Error) t;
886	+	else {
887	+	AssertionFailedError afe =
888	+	new AssertionFailedError("unexpected exception: " + t);
889	+	afe.initCause(t);
890	+	throw afe;
891	+	}
892	+	}
893	+
894	+	/**
895	+	* Delays, via Thread.sleep, for the given millisecond delay, but
896	+	* if the sleep is shorter than specified, may re-sleep or yield
897	+	* until time elapses.  Ensures that the given time, as measured
898	+	* by System.nanoTime(), has elapsed.
899	+	*/
900	+	static void delay(long millis) throws InterruptedException {
901	+	long nanos = millis * (1000 * 1000);
902	+	final long wakeupTime = System.nanoTime() + nanos;
903	+	do {
904	+	if (millis > 0L)
905	+	Thread.sleep(millis);
906	+	else // too short to sleep
907	+	Thread.yield();
908	+	nanos = wakeupTime - System.nanoTime();
909	+	millis = nanos / (1000 * 1000);
910	+	} while (nanos >= 0L);
911	+	}
912	+
913	+	/**
914	+	* Allows use of try-with-resources with per-test thread pools.
915	+	*/
916	+	class PoolCleaner implements AutoCloseable {
917	+	private final ExecutorService pool;
918	+	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
919	+	public void close() { joinPool(pool); }
920	+	}
921	+
922	+	/**
923	+	* An extension of PoolCleaner that has an action to release the pool.
924	+	*/
925	+	class PoolCleanerWithReleaser extends PoolCleaner {
926	+	private final Runnable releaser;
927	+	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
928	+	super(pool);
929	+	this.releaser = releaser;
930	+	}
931	+	public void close() {
932	+	try {
933	+	releaser.run();
934	+	} finally {
935	+	super.close();
936	+	}
937	+	}
938	+	}
939	+
940	+	PoolCleaner cleaner(ExecutorService pool) {
941	+	return new PoolCleaner(pool);
942	+	}
943	+
944	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
945	+	return new PoolCleanerWithReleaser(pool, releaser);
946	+	}
947	+
948	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
949	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
950	+	}
951	+
952	+	Runnable releaser(final CountDownLatch latch) {
953	+	return new Runnable() { public void run() {
954	+	do { latch.countDown(); }
955	+	while (latch.getCount() > 0);
956	+	}};
957	+	}
958	+
959	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
960	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
961	+	}
962	+
963	+	Runnable releaser(final AtomicBoolean flag) {
964	+	return new Runnable() { public void run() { flag.set(true); }};
965	+	}
966	+
967	+	/**
968	+	* Waits out termination of a thread pool or fails doing so.
969	+	*/
970	+	void joinPool(ExecutorService pool) {
971	+	try {
972	+	pool.shutdown();
973	+	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
974	+	try {
975	+	threadFail("ExecutorService " + pool +
976	+	" did not terminate in a timely manner");
977	+	} finally {
978	+	// last resort, for the benefit of subsequent tests
979	+	pool.shutdownNow();
980	+	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
981	+	}
982	+	}
983	+	} catch (SecurityException ok) {
984	+	// Allowed in case test doesn't have privs
985	+	} catch (InterruptedException fail) {
986	+	threadFail("Unexpected InterruptedException");
987	+	}
988	+	}
989	+
990	+	/**
991	+	* Like Runnable, but with the freedom to throw anything.
992	+	* junit folks had the same idea:
993	+	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
994	+	*/
995	+	interface Action { public void run() throws Throwable; }
996	+
997	+	/**
998	+	* Runs all the given actions in parallel, failing if any fail.
999	+	* Useful for running multiple variants of tests that are
1000	+	* necessarily individually slow because they must block.
1001	+	*/
1002	+	void testInParallel(Action ... actions) {
1003	+	ExecutorService pool = Executors.newCachedThreadPool();
1004	+	try (PoolCleaner cleaner = cleaner(pool)) {
1005	+	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1006	+	for (final Action action : actions)
1007	+	futures.add(pool.submit(new CheckedRunnable() {
1008	+	public void realRun() throws Throwable { action.run();}}));
1009	+	for (Future<?> future : futures)
1010	+	try {
1011	+	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1012	+	} catch (ExecutionException ex) {
1013	+	threadUnexpectedException(ex.getCause());
1014	+	} catch (Exception ex) {
1015	+	threadUnexpectedException(ex);
1016	+	}
1017	+	}
1018	+	}
1019	+
1020	+	/**
1021	+	* A debugging tool to print stack traces of most threads, as jstack does.
1022	+	* Uninteresting threads are filtered out.
1023	+	*/
1024	+	static void dumpTestThreads() {
1025	+	SecurityManager sm = System.getSecurityManager();
1026	+	if (sm != null) {
1027	+	try {
1028	+	System.setSecurityManager(null);
1029	+	} catch (SecurityException giveUp) {
1030	+	return;
1031	+	}
1032	+	}
1033	+
1034	+	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1035	+	System.err.println("------ stacktrace dump start ------");
1036	+	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1037	+	final String name = info.getThreadName();
1038	+	String lockName;
1039	+	if ("Signal Dispatcher".equals(name))
1040	+	continue;
1041	+	if ("Reference Handler".equals(name)
1042	+	&& (lockName = info.getLockName()) != null
1043	+	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1044	+	continue;
1045	+	if ("Finalizer".equals(name)
1046	+	&& (lockName = info.getLockName()) != null
1047	+	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1048	+	continue;
1049	+	if ("checkForWedgedTest".equals(name))
1050	+	continue;
1051	+	System.err.print(info);
1052	+	}
1053	+	System.err.println("------ stacktrace dump end ------");
1054	+
1055	+	if (sm != null) System.setSecurityManager(sm);
1056	+	}
1057	+
1058	+	/**
1059	+	* Checks that thread does not terminate within the default
1060	+	* millisecond delay of {@code timeoutMillis()}.
1061	+	*/
1062	+	void assertThreadStaysAlive(Thread thread) {
1063	+	assertThreadStaysAlive(thread, timeoutMillis());
1064	+	}
1065	+
1066	+	/**
1067	+	* Checks that thread does not terminate within the given millisecond delay.
1068	+	*/
1069	+	void assertThreadStaysAlive(Thread thread, long millis) {
1070	+	try {
1071	+	// No need to optimize the failing case via Thread.join.
1072	+	delay(millis);
1073	+	assertTrue(thread.isAlive());
1074	+	} catch (InterruptedException fail) {
1075	+	threadFail("Unexpected InterruptedException");
1076	+	}
1077	+	}
1078	+
1079	+	/**
1080	+	* Checks that the threads do not terminate within the default
1081	+	* millisecond delay of {@code timeoutMillis()}.
1082	+	*/
1083	+	void assertThreadsStayAlive(Thread... threads) {
1084	+	assertThreadsStayAlive(timeoutMillis(), threads);
1085	+	}
1086	+
1087	+	/**
1088	+	* Checks that the threads do not terminate within the given millisecond delay.
1089	+	*/
1090	+	void assertThreadsStayAlive(long millis, Thread... threads) {
1091	+	try {
1092	+	// No need to optimize the failing case via Thread.join.
1093	+	delay(millis);
1094	+	for (Thread thread : threads)
1095	+	assertTrue(thread.isAlive());
1096	+	} catch (InterruptedException fail) {
1097	+	threadFail("Unexpected InterruptedException");
1098	+	}
1099	+	}
1100	+
1101	+	/**
1102	+	* Checks that future.get times out, with the default timeout of
1103	+	* {@code timeoutMillis()}.
1104	+	*/
1105	+	void assertFutureTimesOut(Future future) {
1106	+	assertFutureTimesOut(future, timeoutMillis());
1107	+	}
1108	+
1109	+	/**
1110	+	* Checks that future.get times out, with the given millisecond timeout.
1111	+	*/
1112	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
1113	+	long startTime = System.nanoTime();
1114	+	try {
1115	+	future.get(timeoutMillis, MILLISECONDS);
1116	+	shouldThrow();
1117	+	} catch (TimeoutException success) {
1118	+	} catch (Exception fail) {
1119	+	threadUnexpectedException(fail);
1120	+	} finally { future.cancel(true); }
1121	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1122	+	}
1123	+
1124	+	/**
1125	+	* Fails with message "should throw exception".
1126	+	*/
1127	+	public void shouldThrow() {
1128	+	fail("Should throw exception");
1129	+	}
1130	+
1131	+	/**
1132	+	* Fails with message "should throw " + exceptionName.
1133	+	*/
1134	+	public void shouldThrow(String exceptionName) {
1135	+	fail("Should throw " + exceptionName);
1136	+	}
1137
1138		/**
1139		* The number of elements to place in collections, arrays, etc.
#	Line 155 | Line 1142 | public class JSR166TestCase extends Test
1142
1143		// Some convenient Integer constants
1144
1145	<	public static final Integer zero = new Integer(0);
1146	<	public static final Integer one = new Integer(1);
1147	<	public static final Integer two = new Integer(2);
1148	<	public static final Integer three  = new Integer(3);
1145	>	public static final Integer zero  = new Integer(0);
1146	>	public static final Integer one   = new Integer(1);
1147	>	public static final Integer two   = new Integer(2);
1148	>	public static final Integer three = new Integer(3);
1149		public static final Integer four  = new Integer(4);
1150		public static final Integer five  = new Integer(5);
1151	<	public static final Integer six = new Integer(6);
1151	>	public static final Integer six   = new Integer(6);
1152		public static final Integer seven = new Integer(7);
1153		public static final Integer eight = new Integer(8);
1154	<	public static final Integer nine = new Integer(9);
1154	>	public static final Integer nine  = new Integer(9);
1155		public static final Integer m1  = new Integer(-1);
1156		public static final Integer m2  = new Integer(-2);
1157		public static final Integer m3  = new Integer(-3);
1158	<	public static final Integer m4 = new Integer(-4);
1159	<	public static final Integer m5 = new Integer(-5);
1158	>	public static final Integer m4  = new Integer(-4);
1159	>	public static final Integer m5  = new Integer(-5);
1160	>	public static final Integer m6  = new Integer(-6);
1161		public static final Integer m10 = new Integer(-10);
1162
1163	+	/**
1164	+	* Runs Runnable r with a security policy that permits precisely
1165	+	* the specified permissions.  If there is no current security
1166	+	* manager, the runnable is run twice, both with and without a
1167	+	* security manager.  We require that any security manager permit
1168	+	* getPolicy/setPolicy.
1169	+	*/
1170	+	public void runWithPermissions(Runnable r, Permission... permissions) {
1171	+	SecurityManager sm = System.getSecurityManager();
1172	+	if (sm == null) {
1173	+	r.run();
1174	+	}
1175	+	runWithSecurityManagerWithPermissions(r, permissions);
1176	+	}
1177
1178	<	// Some convenient Runnable classes
1178	>	/**
1179	>	* Runs Runnable r with a security policy that permits precisely
1180	>	* the specified permissions.  If there is no current security
1181	>	* manager, a temporary one is set for the duration of the
1182	>	* Runnable.  We require that any security manager permit
1183	>	* getPolicy/setPolicy.
1184	>	*/
1185	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1186	>	Permission... permissions) {
1187	>	SecurityManager sm = System.getSecurityManager();
1188	>	if (sm == null) {
1189	>	Policy savedPolicy = Policy.getPolicy();
1190	>	try {
1191	>	Policy.setPolicy(permissivePolicy());
1192	>	System.setSecurityManager(new SecurityManager());
1193	>	runWithSecurityManagerWithPermissions(r, permissions);
1194	>	} finally {
1195	>	System.setSecurityManager(null);
1196	>	Policy.setPolicy(savedPolicy);
1197	>	}
1198	>	} else {
1199	>	Policy savedPolicy = Policy.getPolicy();
1200	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1201	>	Policy.setPolicy(policy);
1202
1203	<	public static class NoOpRunnable implements Runnable {
1204	<	public void run() {}
1203	>	try {
1204	>	r.run();
1205	>	} finally {
1206	>	policy.addPermission(new SecurityPermission("setPolicy"));
1207	>	Policy.setPolicy(savedPolicy);
1208	>	}
1209	>	}
1210		}
1211
1212	<	public static class NoOpCallable implements Callable {
1213	<	public Object call() { return Boolean.TRUE; }
1212	>	/**
1213	>	* Runs a runnable without any permissions.
1214	>	*/
1215	>	public void runWithoutPermissions(Runnable r) {
1216	>	runWithPermissions(r);
1217		}
1218
1219	<	public class ShortRunnable implements Runnable {
1220	<	public void run() {
1221	<	try {
1222	<	Thread.sleep(SHORT_DELAY_MS);
1219	>	/**
1220	>	* A security policy where new permissions can be dynamically added
1221	>	* or all cleared.
1222	>	*/
1223	>	public static class AdjustablePolicy extends java.security.Policy {
1224	>	Permissions perms = new Permissions();
1225	>	AdjustablePolicy(Permission... permissions) {
1226	>	for (Permission permission : permissions)
1227	>	perms.add(permission);
1228	>	}
1229	>	void addPermission(Permission perm) { perms.add(perm); }
1230	>	void clearPermissions() { perms = new Permissions(); }
1231	>	public PermissionCollection getPermissions(CodeSource cs) {
1232	>	return perms;
1233	>	}
1234	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1235	>	return perms;
1236	>	}
1237	>	public boolean implies(ProtectionDomain pd, Permission p) {
1238	>	return perms.implies(p);
1239	>	}
1240	>	public void refresh() {}
1241	>	public String toString() {
1242	>	List<Permission> ps = new ArrayList<>();
1243	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1244	>	ps.add(e.nextElement());
1245	>	return "AdjustablePolicy with permissions " + ps;
1246	>	}
1247	>	}
1248	>
1249	>	/**
1250	>	* Returns a policy containing all the permissions we ever need.
1251	>	*/
1252	>	public static Policy permissivePolicy() {
1253	>	return new AdjustablePolicy
1254	>	// Permissions j.u.c. needs directly
1255	>	(new RuntimePermission("modifyThread"),
1256	>	new RuntimePermission("getClassLoader"),
1257	>	new RuntimePermission("setContextClassLoader"),
1258	>	// Permissions needed to change permissions!
1259	>	new SecurityPermission("getPolicy"),
1260	>	new SecurityPermission("setPolicy"),
1261	>	new RuntimePermission("setSecurityManager"),
1262	>	// Permissions needed by the junit test harness
1263	>	new RuntimePermission("accessDeclaredMembers"),
1264	>	new PropertyPermission("*", "read"),
1265	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1266	>	}
1267	>
1268	>	/**
1269	>	* Sleeps until the given time has elapsed.
1270	>	* Throws AssertionFailedError if interrupted.
1271	>	*/
1272	>	static void sleep(long millis) {
1273	>	try {
1274	>	delay(millis);
1275	>	} catch (InterruptedException fail) {
1276	>	AssertionFailedError afe =
1277	>	new AssertionFailedError("Unexpected InterruptedException");
1278	>	afe.initCause(fail);
1279	>	throw afe;
1280	>	}
1281	>	}
1282	>
1283	>	/**
1284	>	* Spin-waits up to the specified number of milliseconds for the given
1285	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1286	>	*/
1287	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1288	>	long startTime = 0L;
1289	>	for (;;) {
1290	>	Thread.State s = thread.getState();
1291	>	if (s == Thread.State.BLOCKED ||
1292	>	s == Thread.State.WAITING ||
1293	>	s == Thread.State.TIMED_WAITING)
1294	>	return;
1295	>	else if (s == Thread.State.TERMINATED)
1296	>	fail("Unexpected thread termination");
1297	>	else if (startTime == 0L)
1298	>	startTime = System.nanoTime();
1299	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1300	>	threadAssertTrue(thread.isAlive());
1301	>	fail("timed out waiting for thread to enter wait state");
1302		}
1303	<	catch(Exception e) {
1304	<	threadFail("unexpectedException");
1303	>	Thread.yield();
1304	>	}
1305	>	}
1306	>
1307	>	/**
1308	>	* Spin-waits up to the specified number of milliseconds for the given
1309	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1310	>	* and additionally satisfy the given condition.
1311	>	*/
1312	>	void waitForThreadToEnterWaitState(
1313	>	Thread thread, long timeoutMillis, Callable<Boolean> waitingForGodot) {
1314	>	long startTime = 0L;
1315	>	for (;;) {
1316	>	Thread.State s = thread.getState();
1317	>	if (s == Thread.State.BLOCKED ||
1318	>	s == Thread.State.WAITING ||
1319	>	s == Thread.State.TIMED_WAITING) {
1320	>	try {
1321	>	if (waitingForGodot.call())
1322	>	return;
1323	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1324	>	}
1325	>	else if (s == Thread.State.TERMINATED)
1326	>	fail("Unexpected thread termination");
1327	>	else if (startTime == 0L)
1328	>	startTime = System.nanoTime();
1329	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1330	>	threadAssertTrue(thread.isAlive());
1331	>	fail("timed out waiting for thread to enter wait state");
1332		}
1333	+	Thread.yield();
1334		}
1335		}
1336
1337	<	public class ShortInterruptedRunnable implements Runnable {
1338	<	public void run() {
1337	>	/**
1338	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1339	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1340	>	*/
1341	>	void waitForThreadToEnterWaitState(Thread thread) {
1342	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1343	>	}
1344	>
1345	>	/**
1346	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1347	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1348	>	* and additionally satisfy the given condition.
1349	>	*/
1350	>	void waitForThreadToEnterWaitState(
1351	>	Thread thread, Callable<Boolean> waitingForGodot) {
1352	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1353	>	}
1354	>
1355	>	/**
1356	>	* Returns the number of milliseconds since time given by
1357	>	* startNanoTime, which must have been previously returned from a
1358	>	* call to {@link System#nanoTime()}.
1359	>	*/
1360	>	static long millisElapsedSince(long startNanoTime) {
1361	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1362	>	}
1363	>
1364	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1365	>	//         long startTime = System.nanoTime();
1366	>	//         try {
1367	>	//             r.run();
1368	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1369	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1370	>	//             throw new AssertionFailedError("did not return promptly");
1371	>	//     }
1372	>
1373	>	//     void assertTerminatesPromptly(Runnable r) {
1374	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1375	>	//     }
1376	>
1377	>	/**
1378	>	* Checks that timed f.get() returns the expected value, and does not
1379	>	* wait for the timeout to elapse before returning.
1380	>	*/
1381	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1382	>	long startTime = System.nanoTime();
1383	>	try {
1384	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1385	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1386	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1387	>	throw new AssertionFailedError("timed get did not return promptly");
1388	>	}
1389	>
1390	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1391	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1392	>	}
1393	>
1394	>	/**
1395	>	* Returns a new started daemon Thread running the given runnable.
1396	>	*/
1397	>	Thread newStartedThread(Runnable runnable) {
1398	>	Thread t = new Thread(runnable);
1399	>	t.setDaemon(true);
1400	>	t.start();
1401	>	return t;
1402	>	}
1403	>
1404	>	/**
1405	>	* Waits for the specified time (in milliseconds) for the thread
1406	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1407	>	* the thread (in the hope that it may terminate later) and fails.
1408	>	*/
1409	>	void awaitTermination(Thread t, long timeoutMillis) {
1410	>	try {
1411	>	t.join(timeoutMillis);
1412	>	} catch (InterruptedException fail) {
1413	>	threadUnexpectedException(fail);
1414	>	} finally {
1415	>	if (t.getState() != Thread.State.TERMINATED) {
1416	>	t.interrupt();
1417	>	threadFail("timed out waiting for thread to terminate");
1418	>	}
1419	>	}
1420	>	}
1421	>
1422	>	/**
1423	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1424	>	* terminate (using {@link Thread#join(long)}), else interrupts
1425	>	* the thread (in the hope that it may terminate later) and fails.
1426	>	*/
1427	>	void awaitTermination(Thread t) {
1428	>	awaitTermination(t, LONG_DELAY_MS);
1429	>	}
1430	>
1431	>	// Some convenient Runnable classes
1432	>
1433	>	public abstract class CheckedRunnable implements Runnable {
1434	>	protected abstract void realRun() throws Throwable;
1435	>
1436	>	public final void run() {
1437		try {
1438	<	Thread.sleep(SHORT_DELAY_MS);
1439	<	threadFail("should throw IE");
1438	>	realRun();
1439	>	} catch (Throwable fail) {
1440	>	threadUnexpectedException(fail);
1441		}
1442	<	catch(InterruptedException success) {
1442	>	}
1443	>	}
1444	>
1445	>	public abstract class RunnableShouldThrow implements Runnable {
1446	>	protected abstract void realRun() throws Throwable;
1447	>
1448	>	final Class<?> exceptionClass;
1449	>
1450	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1451	>	this.exceptionClass = exceptionClass;
1452	>	}
1453	>
1454	>	public final void run() {
1455	>	try {
1456	>	realRun();
1457	>	threadShouldThrow(exceptionClass.getSimpleName());
1458	>	} catch (Throwable t) {
1459	>	if (! exceptionClass.isInstance(t))
1460	>	threadUnexpectedException(t);
1461		}
1462		}
1463		}
1464
1465	<	public class SmallRunnable implements Runnable {
1466	<	public void run() {
1465	>	public abstract class ThreadShouldThrow extends Thread {
1466	>	protected abstract void realRun() throws Throwable;
1467	>
1468	>	final Class<?> exceptionClass;
1469	>
1470	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1471	>	this.exceptionClass = exceptionClass;
1472	>	}
1473	>
1474	>	public final void run() {
1475		try {
1476	<	Thread.sleep(SMALL_DELAY_MS);
1476	>	realRun();
1477	>	threadShouldThrow(exceptionClass.getSimpleName());
1478	>	} catch (Throwable t) {
1479	>	if (! exceptionClass.isInstance(t))
1480	>	threadUnexpectedException(t);
1481		}
1482	<	catch(Exception e) {
1483	<	threadFail("unexpectedException");
1482	>	}
1483	>	}
1484	>
1485	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1486	>	protected abstract void realRun() throws Throwable;
1487	>
1488	>	public final void run() {
1489	>	try {
1490	>	realRun();
1491	>	threadShouldThrow("InterruptedException");
1492	>	} catch (InterruptedException success) {
1493	>	threadAssertFalse(Thread.interrupted());
1494	>	} catch (Throwable fail) {
1495	>	threadUnexpectedException(fail);
1496		}
1497		}
1498		}
1499
1500	<	public class SmallCallable implements Callable {
1501	<	public Object call() {
1500	>	public abstract class CheckedCallable<T> implements Callable<T> {
1501	>	protected abstract T realCall() throws Throwable;
1502	>
1503	>	public final T call() {
1504		try {
1505	<	Thread.sleep(SMALL_DELAY_MS);
1505	>	return realCall();
1506	>	} catch (Throwable fail) {
1507	>	threadUnexpectedException(fail);
1508	>	return null;
1509		}
1510	<	catch(Exception e) {
1511	<	threadFail("unexpectedException");
1510	>	}
1511	>	}
1512	>
1513	>	public abstract class CheckedInterruptedCallable<T>
1514	>	implements Callable<T> {
1515	>	protected abstract T realCall() throws Throwable;
1516	>
1517	>	public final T call() {
1518	>	try {
1519	>	T result = realCall();
1520	>	threadShouldThrow("InterruptedException");
1521	>	return result;
1522	>	} catch (InterruptedException success) {
1523	>	threadAssertFalse(Thread.interrupted());
1524	>	} catch (Throwable fail) {
1525	>	threadUnexpectedException(fail);
1526		}
1527	+	return null;
1528	+	}
1529	+	}
1530	+
1531	+	public static class NoOpRunnable implements Runnable {
1532	+	public void run() {}
1533	+	}
1534	+
1535	+	public static class NoOpCallable implements Callable {
1536	+	public Object call() { return Boolean.TRUE; }
1537	+	}
1538	+
1539	+	public static final String TEST_STRING = "a test string";
1540	+
1541	+	public static class StringTask implements Callable<String> {
1542	+	final String value;
1543	+	public StringTask() { this(TEST_STRING); }
1544	+	public StringTask(String value) { this.value = value; }
1545	+	public String call() { return value; }
1546	+	}
1547	+
1548	+	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1549	+	return new CheckedCallable<String>() {
1550	+	protected String realCall() {
1551	+	try {
1552	+	latch.await();
1553	+	} catch (InterruptedException quittingTime) {}
1554	+	return TEST_STRING;
1555	+	}};
1556	+	}
1557	+
1558	+	public Runnable countDowner(final CountDownLatch latch) {
1559	+	return new CheckedRunnable() {
1560	+	public void realRun() throws InterruptedException {
1561	+	latch.countDown();
1562	+	}};
1563	+	}
1564	+
1565	+	class LatchAwaiter extends CheckedRunnable {
1566	+	static final int NEW = 0;
1567	+	static final int RUNNING = 1;
1568	+	static final int DONE = 2;
1569	+	final CountDownLatch latch;
1570	+	int state = NEW;
1571	+	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1572	+	public void realRun() throws InterruptedException {
1573	+	state = 1;
1574	+	await(latch);
1575	+	state = 2;
1576	+	}
1577	+	}
1578	+
1579	+	public LatchAwaiter awaiter(CountDownLatch latch) {
1580	+	return new LatchAwaiter(latch);
1581	+	}
1582	+
1583	+	public void await(CountDownLatch latch, long timeoutMillis) {
1584	+	try {
1585	+	if (!latch.await(timeoutMillis, MILLISECONDS))
1586	+	fail("timed out waiting for CountDownLatch for "
1587	+	+ (timeoutMillis/1000) + " sec");
1588	+	} catch (Throwable fail) {
1589	+	threadUnexpectedException(fail);
1590	+	}
1591	+	}
1592	+
1593	+	public void await(CountDownLatch latch) {
1594	+	await(latch, LONG_DELAY_MS);
1595	+	}
1596	+
1597	+	public void await(Semaphore semaphore) {
1598	+	try {
1599	+	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1600	+	fail("timed out waiting for Semaphore for "
1601	+	+ (LONG_DELAY_MS/1000) + " sec");
1602	+	} catch (Throwable fail) {
1603	+	threadUnexpectedException(fail);
1604	+	}
1605	+	}
1606	+
1607	+	//     /**
1608	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1609	+	//      */
1610	+	//     public void await(AtomicBoolean flag) {
1611	+	//         await(flag, LONG_DELAY_MS);
1612	+	//     }
1613	+
1614	+	//     /**
1615	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1616	+	//      */
1617	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1618	+	//         long startTime = System.nanoTime();
1619	+	//         while (!flag.get()) {
1620	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1621	+	//                 throw new AssertionFailedError("timed out");
1622	+	//             Thread.yield();
1623	+	//         }
1624	+	//     }
1625	+
1626	+	public static class NPETask implements Callable<String> {
1627	+	public String call() { throw new NullPointerException(); }
1628	+	}
1629	+
1630	+	public static class CallableOne implements Callable<Integer> {
1631	+	public Integer call() { return one; }
1632	+	}
1633	+
1634	+	public class ShortRunnable extends CheckedRunnable {
1635	+	protected void realRun() throws Throwable {
1636	+	delay(SHORT_DELAY_MS);
1637	+	}
1638	+	}
1639	+
1640	+	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1641	+	protected void realRun() throws InterruptedException {
1642	+	delay(SHORT_DELAY_MS);
1643	+	}
1644	+	}
1645	+
1646	+	public class SmallRunnable extends CheckedRunnable {
1647	+	protected void realRun() throws Throwable {
1648	+	delay(SMALL_DELAY_MS);
1649	+	}
1650	+	}
1651	+
1652	+	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1653	+	protected void realRun() {
1654	+	try {
1655	+	delay(SMALL_DELAY_MS);
1656	+	} catch (InterruptedException ok) {}
1657	+	}
1658	+	}
1659	+
1660	+	public class SmallCallable extends CheckedCallable {
1661	+	protected Object realCall() throws InterruptedException {
1662	+	delay(SMALL_DELAY_MS);
1663		return Boolean.TRUE;
1664		}
1665		}
1666
1667	<	public class SmallInterruptedRunnable implements Runnable {
1667	>	public class MediumRunnable extends CheckedRunnable {
1668	>	protected void realRun() throws Throwable {
1669	>	delay(MEDIUM_DELAY_MS);
1670	>	}
1671	>	}
1672	>
1673	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1674	>	protected void realRun() throws InterruptedException {
1675	>	delay(MEDIUM_DELAY_MS);
1676	>	}
1677	>	}
1678	>
1679	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1680	>	return new CheckedRunnable() {
1681	>	protected void realRun() {
1682	>	try {
1683	>	delay(timeoutMillis);
1684	>	} catch (InterruptedException ok) {}
1685	>	}};
1686	>	}
1687	>
1688	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1689	>	protected void realRun() {
1690	>	try {
1691	>	delay(MEDIUM_DELAY_MS);
1692	>	} catch (InterruptedException ok) {}
1693	>	}
1694	>	}
1695	>
1696	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1697	>	protected void realRun() {
1698	>	try {
1699	>	delay(LONG_DELAY_MS);
1700	>	} catch (InterruptedException ok) {}
1701	>	}
1702	>	}
1703	>
1704	>	/**
1705	>	* For use as ThreadFactory in constructors
1706	>	*/
1707	>	public static class SimpleThreadFactory implements ThreadFactory {
1708	>	public Thread newThread(Runnable r) {
1709	>	return new Thread(r);
1710	>	}
1711	>	}
1712	>
1713	>	public interface TrackedRunnable extends Runnable {
1714	>	boolean isDone();
1715	>	}
1716	>
1717	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1718	>	return new TrackedRunnable() {
1719	>	private volatile boolean done = false;
1720	>	public boolean isDone() { return done; }
1721	>	public void run() {
1722	>	try {
1723	>	delay(timeoutMillis);
1724	>	done = true;
1725	>	} catch (InterruptedException ok) {}
1726	>	}
1727	>	};
1728	>	}
1729	>
1730	>	public static class TrackedShortRunnable implements Runnable {
1731	>	public volatile boolean done = false;
1732		public void run() {
1733		try {
1734	<	Thread.sleep(SMALL_DELAY_MS);
1735	<	threadFail("should throw IE");
1736	<	}
237	<	catch(InterruptedException success) {
238	<	}
1734	>	delay(SHORT_DELAY_MS);
1735	>	done = true;
1736	>	} catch (InterruptedException ok) {}
1737		}
1738		}
1739
1740	+	public static class TrackedSmallRunnable implements Runnable {
1741	+	public volatile boolean done = false;
1742	+	public void run() {
1743	+	try {
1744	+	delay(SMALL_DELAY_MS);
1745	+	done = true;
1746	+	} catch (InterruptedException ok) {}
1747	+	}
1748	+	}
1749
1750	<	public class MediumRunnable implements Runnable {
1750	>	public static class TrackedMediumRunnable implements Runnable {
1751	>	public volatile boolean done = false;
1752		public void run() {
1753		try {
1754	<	Thread.sleep(MEDIUM_DELAY_MS);
1755	<	}
1756	<	catch(Exception e) {
1757	<	threadFail("unexpectedException");
1758	<	}
1754	>	delay(MEDIUM_DELAY_MS);
1755	>	done = true;
1756	>	} catch (InterruptedException ok) {}
1757	>	}
1758	>	}
1759	>
1760	>	public static class TrackedLongRunnable implements Runnable {
1761	>	public volatile boolean done = false;
1762	>	public void run() {
1763	>	try {
1764	>	delay(LONG_DELAY_MS);
1765	>	done = true;
1766	>	} catch (InterruptedException ok) {}
1767		}
1768		}
1769
1770	<	public class MediumInterruptedRunnable implements Runnable {
1770	>	public static class TrackedNoOpRunnable implements Runnable {
1771	>	public volatile boolean done = false;
1772		public void run() {
1773	+	done = true;
1774	+	}
1775	+	}
1776	+
1777	+	public static class TrackedCallable implements Callable {
1778	+	public volatile boolean done = false;
1779	+	public Object call() {
1780		try {
1781	<	Thread.sleep(MEDIUM_DELAY_MS);
1782	<	threadFail("should throw IE");
1781	>	delay(SMALL_DELAY_MS);
1782	>	done = true;
1783	>	} catch (InterruptedException ok) {}
1784	>	return Boolean.TRUE;
1785	>	}
1786	>	}
1787	>
1788	>	/**
1789	>	* Analog of CheckedRunnable for RecursiveAction
1790	>	*/
1791	>	public abstract class CheckedRecursiveAction extends RecursiveAction {
1792	>	protected abstract void realCompute() throws Throwable;
1793	>
1794	>	@Override protected final void compute() {
1795	>	try {
1796	>	realCompute();
1797	>	} catch (Throwable fail) {
1798	>	threadUnexpectedException(fail);
1799		}
1800	<	catch(InterruptedException success) {
1800	>	}
1801	>	}
1802	>
1803	>	/**
1804	>	* Analog of CheckedCallable for RecursiveTask
1805	>	*/
1806	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1807	>	protected abstract T realCompute() throws Throwable;
1808	>
1809	>	@Override protected final T compute() {
1810	>	try {
1811	>	return realCompute();
1812	>	} catch (Throwable fail) {
1813	>	threadUnexpectedException(fail);
1814	>	return null;
1815		}
1816		}
1817		}
1818
1819	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1820	<	public void run() {
1819	>	/**
1820	>	* For use as RejectedExecutionHandler in constructors
1821	>	*/
1822	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1823	>	public void rejectedExecution(Runnable r,
1824	>	ThreadPoolExecutor executor) {}
1825	>	}
1826	>
1827	>	/**
1828	>	* A CyclicBarrier that uses timed await and fails with
1829	>	* AssertionFailedErrors instead of throwing checked exceptions.
1830	>	*/
1831	>	public static class CheckedBarrier extends CyclicBarrier {
1832	>	public CheckedBarrier(int parties) { super(parties); }
1833	>
1834	>	public int await() {
1835		try {
1836	<	Thread.sleep(MEDIUM_DELAY_MS);
1836	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1837	>	} catch (TimeoutException timedOut) {
1838	>	throw new AssertionFailedError("timed out");
1839	>	} catch (Exception fail) {
1840	>	AssertionFailedError afe =
1841	>	new AssertionFailedError("Unexpected exception: " + fail);
1842	>	afe.initCause(fail);
1843	>	throw afe;
1844		}
1845	<	catch(InterruptedException success) {
1845	>	}
1846	>	}
1847	>
1848	>	void checkEmpty(BlockingQueue q) {
1849	>	try {
1850	>	assertTrue(q.isEmpty());
1851	>	assertEquals(0, q.size());
1852	>	assertNull(q.peek());
1853	>	assertNull(q.poll());
1854	>	assertNull(q.poll(0, MILLISECONDS));
1855	>	assertEquals(q.toString(), "[]");
1856	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1857	>	assertFalse(q.iterator().hasNext());
1858	>	try {
1859	>	q.element();
1860	>	shouldThrow();
1861	>	} catch (NoSuchElementException success) {}
1862	>	try {
1863	>	q.iterator().next();
1864	>	shouldThrow();
1865	>	} catch (NoSuchElementException success) {}
1866	>	try {
1867	>	q.remove();
1868	>	shouldThrow();
1869	>	} catch (NoSuchElementException success) {}
1870	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1871	>	}
1872	>
1873	>	void assertSerialEquals(Object x, Object y) {
1874	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1875	>	}
1876	>
1877	>	void assertNotSerialEquals(Object x, Object y) {
1878	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1879	>	}
1880	>
1881	>	byte[] serialBytes(Object o) {
1882	>	try {
1883	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1884	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1885	>	oos.writeObject(o);
1886	>	oos.flush();
1887	>	oos.close();
1888	>	return bos.toByteArray();
1889	>	} catch (Throwable fail) {
1890	>	threadUnexpectedException(fail);
1891	>	return new byte[0];
1892	>	}
1893	>	}
1894	>
1895	>	void assertImmutable(final Object o) {
1896	>	if (o instanceof Collection) {
1897	>	assertThrows(
1898	>	UnsupportedOperationException.class,
1899	>	new Runnable() { public void run() {
1900	>	((Collection) o).add(null);}});
1901	>	}
1902	>	}
1903	>
1904	>	@SuppressWarnings("unchecked")
1905	>	<T> T serialClone(T o) {
1906	>	try {
1907	>	ObjectInputStream ois = new ObjectInputStream
1908	>	(new ByteArrayInputStream(serialBytes(o)));
1909	>	T clone = (T) ois.readObject();
1910	>	if (o == clone) assertImmutable(o);
1911	>	assertSame(o.getClass(), clone.getClass());
1912	>	return clone;
1913	>	} catch (Throwable fail) {
1914	>	threadUnexpectedException(fail);
1915	>	return null;
1916	>	}
1917	>	}
1918	>
1919	>	/**
1920	>	* A version of serialClone that leaves error handling (for
1921	>	* e.g. NotSerializableException) up to the caller.
1922	>	*/
1923	>	@SuppressWarnings("unchecked")
1924	>	<T> T serialClonePossiblyFailing(T o)
1925	>	throws ReflectiveOperationException, java.io.IOException {
1926	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1927	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1928	>	oos.writeObject(o);
1929	>	oos.flush();
1930	>	oos.close();
1931	>	ObjectInputStream ois = new ObjectInputStream
1932	>	(new ByteArrayInputStream(bos.toByteArray()));
1933	>	T clone = (T) ois.readObject();
1934	>	if (o == clone) assertImmutable(o);
1935	>	assertSame(o.getClass(), clone.getClass());
1936	>	return clone;
1937	>	}
1938	>
1939	>	/**
1940	>	* If o implements Cloneable and has a public clone method,
1941	>	* returns a clone of o, else null.
1942	>	*/
1943	>	@SuppressWarnings("unchecked")
1944	>	<T> T cloneableClone(T o) {
1945	>	if (!(o instanceof Cloneable)) return null;
1946	>	final T clone;
1947	>	try {
1948	>	clone = (T) o.getClass().getMethod("clone").invoke(o);
1949	>	} catch (NoSuchMethodException ok) {
1950	>	return null;
1951	>	} catch (ReflectiveOperationException unexpected) {
1952	>	throw new Error(unexpected);
1953	>	}
1954	>	assertNotSame(o, clone); // not 100% guaranteed by spec
1955	>	assertSame(o.getClass(), clone.getClass());
1956	>	return clone;
1957	>	}
1958	>
1959	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1960	>	Runnable... throwingActions) {
1961	>	for (Runnable throwingAction : throwingActions) {
1962	>	boolean threw = false;
1963	>	try { throwingAction.run(); }
1964	>	catch (Throwable t) {
1965	>	threw = true;
1966	>	if (!expectedExceptionClass.isInstance(t)) {
1967	>	AssertionFailedError afe =
1968	>	new AssertionFailedError
1969	>	("Expected " + expectedExceptionClass.getName() +
1970	>	", got " + t.getClass().getName());
1971	>	afe.initCause(t);
1972	>	threadUnexpectedException(afe);
1973	>	}
1974		}
1975	+	if (!threw)
1976	+	shouldThrow(expectedExceptionClass.getName());
1977		}
1978		}
1979	<
1979	>
1980	>	public void assertIteratorExhausted(Iterator<?> it) {
1981	>	try {
1982	>	it.next();
1983	>	shouldThrow();
1984	>	} catch (NoSuchElementException success) {}
1985	>	assertFalse(it.hasNext());
1986	>	}
1987	>
1988	>	public <T> Callable<T> callableThrowing(final Exception ex) {
1989	>	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1990	>	}
1991	>
1992	>	public Runnable runnableThrowing(final RuntimeException ex) {
1993	>	return new Runnable() { public void run() { throw ex; }};
1994	>	}
1995	>
1996	>	/** A reusable thread pool to be shared by tests. */
1997	>	static final ExecutorService cachedThreadPool =
1998	>	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1999	>	1000L, MILLISECONDS,
2000	>	new SynchronousQueue<Runnable>());
2001	>
2002	>	static <T> void shuffle(T[] array) {
2003	>	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
2004	>	}
2005		}

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