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Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.2 by dl, Sat Sep 20 00:31:57 2003 UTC vs.
Revision 1.229 by jsr166, Sun May 14 03:15:37 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 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.*;
12	<	import java.util.concurrent.*;
13	<	import java.io.*;
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;
60	+	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 and
104	<	* utility methods, as well as a simple framework for helping to make
105	<	* sure that assertions failing in generated threads cause the
106	<	* associated test that generated them to itself fail (which JUnit doe
107	<	* not otherwise arrange).  The rules for creating such tests are:
103	>	* Base class for JSR166 Junit TCK tests.  Defines some constants,
104	>	* utility methods and classes, as well as a simple framework for
105	>	* helping to make sure that assertions failing in generated threads
106	>	* cause the associated test that generated them to itself fail (which
107	>	* JUnit does not otherwise arrange).  The rules for creating such
108	>	* tests are:
109		*
110		* <ol>
111		*
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	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
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
121	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
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 {@link
126	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
127	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
128	<	* discriminatable from zero time, and always allows enough time for
129	<	* the small amounts of computation (creating a thread, calling a few
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},
127	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
128	>	* discriminable from zero time, and always allows enough time for the
129	>	* small amounts of computation (creating a thread, calling a few
130		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
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
137	<	* method (or <tt>fail</tt> to do so) before returning from the
138	<	* method. The {@link joinPool} method can be used to do this when
139	<	* using Executors.</li>
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.
140		*
141		* </ol>
142	+	*
143	+	* <p><b>Other notes</b>
144	+	* <ul>
145	+	*
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 isolation.
152	+	*
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.
157	+	*
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.
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.
168	+	*
169	+	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
170	+	* runs all JSR166 unit tests.
171	+	*
172	+	* </ul>
173		*/
174		public class JSR166TestCase extends TestCase {
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	+	* 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	+	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	+	}
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.
457	+	*/
458	+	public static Test 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
61	–
641		/**
642	<	* Return the shortest timed delay. This could
643	<	* be reimplmented to use for example a Property.
644	<	*/
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
70	–
651		/**
652	<	* Set delays as multiples fo SHORT_DELAY.
652	>	* Sets delays as multiples of SHORT_DELAY.
653		*/
654	<	protected  void setDelays() {
654	>	protected void setDelays() {
655		SHORT_DELAY_MS = getShortDelay();
656	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
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	<	* Flag set true if any threadAssert methods fail
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	<	protected volatile boolean threadFailed;
670	>	static long timeoutMillis() {
671	>	return TIMEOUT_DELAY_MS;
672	>	}
673
674		/**
675	<	* Initialize test to indicat that no thread assertions have failed
675	>	* Returns a new Date instance representing a time at least
676	>	* delayMillis milliseconds in the future.
677		*/
678	<	public void setUp() {
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<>(null);
688	>
689	>	/**
690	>	* Records an exception so that it can be rethrown later in the test
691	>	* harness thread, triggering a test case failure.  Only the first
692	>	* failure is recorded; subsequent calls to this method from within
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	>
701	>	public void setUp() {
702		setDelays();
703	<	threadFailed = false;
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.getAndSet(null);
723	>	if (t != null) {
724	>	if (t instanceof Error)
725	>	throw (Error) t;
726	>	else if (t instanceof RuntimeException)
727	>	throw (RuntimeException) t;
728	>	else if (t instanceof Exception)
729	>	throw (Exception) t;
730	>	else {
731	>	AssertionFailedError afe =
732	>	new AssertionFailedError(t.toString());
733	>	afe.initCause(t);
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	<	* Trigger test case failure if any thread assertions have failed
745	>	* Finds missing PoolCleaners
746		*/
747	<	public void tearDown() {
748	<	assertFalse(threadFailed);
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	+	/**
768	+	* Just like fail(reason), but additionally recording (using
769	+	* threadRecordFailure) any AssertionFailedError thrown, so that
770	+	* the current testcase will fail.
771	+	*/
772		public void threadFail(String reason) {
773	<	threadFailed = true;
774	<	fail(reason);
773	>	try {
774	>	fail(reason);
775	>	} catch (AssertionFailedError t) {
776	>	threadRecordFailure(t);
777	>	throw t;
778	>	}
779		}
780
781	+	/**
782	+	* Just like assertTrue(b), but additionally recording (using
783	+	* threadRecordFailure) any AssertionFailedError thrown, so that
784	+	* the current testcase will fail.
785	+	*/
786		public void threadAssertTrue(boolean b) {
787	<	if (!b) {
108	<	threadFailed = true;
787	>	try {
788		assertTrue(b);
789	+	} catch (AssertionFailedError t) {
790	+	threadRecordFailure(t);
791	+	throw t;
792		}
793		}
794	+
795	+	/**
796	+	* Just like assertFalse(b), but additionally recording (using
797	+	* threadRecordFailure) any AssertionFailedError thrown, so that
798	+	* the current testcase will fail.
799	+	*/
800		public void threadAssertFalse(boolean b) {
801	<	if (b) {
114	<	threadFailed = true;
801	>	try {
802		assertFalse(b);
803	+	} catch (AssertionFailedError t) {
804	+	threadRecordFailure(t);
805	+	throw t;
806		}
807		}
808	+
809	+	/**
810	+	* Just like assertNull(x), but additionally recording (using
811	+	* threadRecordFailure) any AssertionFailedError thrown, so that
812	+	* the current testcase will fail.
813	+	*/
814		public void threadAssertNull(Object x) {
815	<	if (x != null) {
120	<	threadFailed = true;
815	>	try {
816		assertNull(x);
817	+	} catch (AssertionFailedError t) {
818	+	threadRecordFailure(t);
819	+	throw t;
820		}
821		}
822	+
823	+	/**
824	+	* Just like assertEquals(x, y), but additionally recording (using
825	+	* threadRecordFailure) any AssertionFailedError thrown, so that
826	+	* the current testcase will fail.
827	+	*/
828		public void threadAssertEquals(long x, long y) {
829	<	if (x != y) {
126	<	threadFailed = true;
829	>	try {
830		assertEquals(x, y);
831	+	} catch (AssertionFailedError t) {
832	+	threadRecordFailure(t);
833	+	throw t;
834		}
835		}
836	+
837	+	/**
838	+	* Just like assertEquals(x, y), but additionally recording (using
839	+	* threadRecordFailure) any AssertionFailedError thrown, so that
840	+	* the current testcase will fail.
841	+	*/
842		public void threadAssertEquals(Object x, Object y) {
843	<	if (x != y && (x == null || !x.equals(y))) {
132	<	threadFailed = true;
843	>	try {
844		assertEquals(x, y);
845	+	} catch (AssertionFailedError fail) {
846	+	threadRecordFailure(fail);
847	+	throw fail;
848	+	} catch (Throwable fail) {
849	+	threadUnexpectedException(fail);
850		}
851		}
852
853		/**
854	<	* Wait out termination of a thread pool or fail doing so
854	>	* Just like assertSame(x, y), but additionally recording (using
855	>	* threadRecordFailure) any AssertionFailedError thrown, so that
856	>	* the current testcase will fail.
857		*/
858	<	public void joinPool(ExecutorService exec) {
858	>	public void threadAssertSame(Object x, Object y) {
859		try {
860	<	exec.shutdown();
861	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
862	<	} catch(InterruptedException ie) {
863	<	fail("unexpected exception");
860	>	assertSame(x, y);
861	>	} catch (AssertionFailedError fail) {
862	>	threadRecordFailure(fail);
863	>	throw fail;
864	>	}
865	>	}
866	>
867	>	/**
868	>	* Calls threadFail with message "should throw exception".
869	>	*/
870	>	public void threadShouldThrow() {
871	>	threadFail("should throw exception");
872	>	}
873	>
874	>	/**
875	>	* Calls threadFail with message "should throw" + exceptionName.
876	>	*/
877	>	public void threadShouldThrow(String exceptionName) {
878	>	threadFail("should throw " + exceptionName);
879	>	}
880	>
881	>	/**
882	>	* Records the given exception using {@link #threadRecordFailure},
883	>	* then rethrows the exception, wrapping it in an
884	>	* AssertionFailedError if necessary.
885	>	*/
886	>	public void threadUnexpectedException(Throwable t) {
887	>	threadRecordFailure(t);
888	>	t.printStackTrace();
889	>	if (t instanceof RuntimeException)
890	>	throw (RuntimeException) t;
891	>	else if (t instanceof Error)
892	>	throw (Error) t;
893	>	else {
894	>	AssertionFailedError afe =
895	>	new AssertionFailedError("unexpected exception: " + 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	+	void joinPool(ExecutorService pool) {
978	+	try {
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 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 future.get times out, with the default timeout of
1087	+	* {@code timeoutMillis()}.
1088	+	*/
1089	+	void assertFutureTimesOut(Future future) {
1090	+	assertFutureTimesOut(future, timeoutMillis());
1091	+	}
1092	+
1093	+	/**
1094	+	* Checks that future.get times out, with the given millisecond timeout.
1095	+	*/
1096	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
1097	+	long startTime = System.nanoTime();
1098	+	try {
1099	+	future.get(timeoutMillis, MILLISECONDS);
1100	+	shouldThrow();
1101	+	} catch (TimeoutException success) {
1102	+	} catch (Exception fail) {
1103	+	threadUnexpectedException(fail);
1104	+	} finally { future.cancel(true); }
1105	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1106	+	}
1107	+
1108	+	/**
1109	+	* Fails with message "should throw exception".
1110	+	*/
1111	+	public void shouldThrow() {
1112	+	fail("Should throw exception");
1113	+	}
1114	+
1115	+	/**
1116	+	* Fails with message "should throw " + exceptionName.
1117	+	*/
1118	+	public void shouldThrow(String exceptionName) {
1119	+	fail("Should throw " + exceptionName);
1120	+	}
1121	+
1122	+	/**
1123	+	* The maximum number of consecutive spurious wakeups we should
1124	+	* tolerate (from APIs like LockSupport.park) before failing a test.
1125	+	*/
1126	+	static final int MAX_SPURIOUS_WAKEUPS = 10;
1127
1128		/**
1129		* The number of elements to place in collections, arrays, etc.
#	Line 155 | Line 1132 | public class JSR166TestCase extends Test
1132
1133		// Some convenient Integer constants
1134
1135	<	public static final Integer zero = new Integer(0);
1136	<	public static final Integer one = new Integer(1);
1137	<	public static final Integer two = new Integer(2);
1138	<	public static final Integer three  = new Integer(3);
1135	>	public static final Integer zero  = new Integer(0);
1136	>	public static final Integer one   = new Integer(1);
1137	>	public static final Integer two   = new Integer(2);
1138	>	public static final Integer three = new Integer(3);
1139		public static final Integer four  = new Integer(4);
1140		public static final Integer five  = new Integer(5);
1141	<	public static final Integer six = new Integer(6);
1141	>	public static final Integer six   = new Integer(6);
1142		public static final Integer seven = new Integer(7);
1143		public static final Integer eight = new Integer(8);
1144	<	public static final Integer nine = new Integer(9);
1144	>	public static final Integer nine  = new Integer(9);
1145		public static final Integer m1  = new Integer(-1);
1146		public static final Integer m2  = new Integer(-2);
1147		public static final Integer m3  = new Integer(-3);
1148	<	public static final Integer m4 = new Integer(-4);
1149	<	public static final Integer m5 = new Integer(-5);
1148	>	public static final Integer m4  = new Integer(-4);
1149	>	public static final Integer m5  = new Integer(-5);
1150	>	public static final Integer m6  = new Integer(-6);
1151		public static final Integer m10 = new Integer(-10);
1152
1153	+	/**
1154	+	* Runs Runnable r with a security policy that permits precisely
1155	+	* the specified permissions.  If there is no current security
1156	+	* manager, the runnable is run twice, both with and without a
1157	+	* security manager.  We require that any security manager permit
1158	+	* getPolicy/setPolicy.
1159	+	*/
1160	+	public void runWithPermissions(Runnable r, Permission... permissions) {
1161	+	SecurityManager sm = System.getSecurityManager();
1162	+	if (sm == null) {
1163	+	r.run();
1164	+	}
1165	+	runWithSecurityManagerWithPermissions(r, permissions);
1166	+	}
1167
1168	<	// Some convenient Runnable classes
1168	>	/**
1169	>	* Runs Runnable r with a security policy that permits precisely
1170	>	* the specified permissions.  If there is no current security
1171	>	* manager, a temporary one is set for the duration of the
1172	>	* Runnable.  We require that any security manager permit
1173	>	* getPolicy/setPolicy.
1174	>	*/
1175	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1176	>	Permission... permissions) {
1177	>	SecurityManager sm = System.getSecurityManager();
1178	>	if (sm == null) {
1179	>	Policy savedPolicy = Policy.getPolicy();
1180	>	try {
1181	>	Policy.setPolicy(permissivePolicy());
1182	>	System.setSecurityManager(new SecurityManager());
1183	>	runWithSecurityManagerWithPermissions(r, permissions);
1184	>	} finally {
1185	>	System.setSecurityManager(null);
1186	>	Policy.setPolicy(savedPolicy);
1187	>	}
1188	>	} else {
1189	>	Policy savedPolicy = Policy.getPolicy();
1190	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1191	>	Policy.setPolicy(policy);
1192
1193	<	public static class NoOpRunnable implements Runnable {
1194	<	public void run() {}
1193	>	try {
1194	>	r.run();
1195	>	} finally {
1196	>	policy.addPermission(new SecurityPermission("setPolicy"));
1197	>	Policy.setPolicy(savedPolicy);
1198	>	}
1199	>	}
1200		}
1201
1202	<	public static class NoOpCallable implements Callable {
1203	<	public Object call() { return Boolean.TRUE; }
1202	>	/**
1203	>	* Runs a runnable without any permissions.
1204	>	*/
1205	>	public void runWithoutPermissions(Runnable r) {
1206	>	runWithPermissions(r);
1207		}
1208
1209	<	public class ShortRunnable implements Runnable {
1210	<	public void run() {
1211	<	try {
1212	<	Thread.sleep(SHORT_DELAY_MS);
1209	>	/**
1210	>	* A security policy where new permissions can be dynamically added
1211	>	* or all cleared.
1212	>	*/
1213	>	public static class AdjustablePolicy extends java.security.Policy {
1214	>	Permissions perms = new Permissions();
1215	>	AdjustablePolicy(Permission... permissions) {
1216	>	for (Permission permission : permissions)
1217	>	perms.add(permission);
1218	>	}
1219	>	void addPermission(Permission perm) { perms.add(perm); }
1220	>	void clearPermissions() { perms = new Permissions(); }
1221	>	public PermissionCollection getPermissions(CodeSource cs) {
1222	>	return perms;
1223	>	}
1224	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1225	>	return perms;
1226	>	}
1227	>	public boolean implies(ProtectionDomain pd, Permission p) {
1228	>	return perms.implies(p);
1229	>	}
1230	>	public void refresh() {}
1231	>	public String toString() {
1232	>	List<Permission> ps = new ArrayList<>();
1233	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1234	>	ps.add(e.nextElement());
1235	>	return "AdjustablePolicy with permissions " + ps;
1236	>	}
1237	>	}
1238	>
1239	>	/**
1240	>	* Returns a policy containing all the permissions we ever need.
1241	>	*/
1242	>	public static Policy permissivePolicy() {
1243	>	return new AdjustablePolicy
1244	>	// Permissions j.u.c. needs directly
1245	>	(new RuntimePermission("modifyThread"),
1246	>	new RuntimePermission("getClassLoader"),
1247	>	new RuntimePermission("setContextClassLoader"),
1248	>	// Permissions needed to change permissions!
1249	>	new SecurityPermission("getPolicy"),
1250	>	new SecurityPermission("setPolicy"),
1251	>	new RuntimePermission("setSecurityManager"),
1252	>	// Permissions needed by the junit test harness
1253	>	new RuntimePermission("accessDeclaredMembers"),
1254	>	new PropertyPermission("*", "read"),
1255	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1256	>	}
1257	>
1258	>	/**
1259	>	* Sleeps until the given time has elapsed.
1260	>	* Throws AssertionFailedError if interrupted.
1261	>	*/
1262	>	static void sleep(long millis) {
1263	>	try {
1264	>	delay(millis);
1265	>	} catch (InterruptedException fail) {
1266	>	AssertionFailedError afe =
1267	>	new AssertionFailedError("Unexpected InterruptedException");
1268	>	afe.initCause(fail);
1269	>	throw afe;
1270	>	}
1271	>	}
1272	>
1273	>	/**
1274	>	* Spin-waits up to the specified number of milliseconds for the given
1275	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1276	>	*/
1277	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1278	>	long startTime = 0L;
1279	>	for (;;) {
1280	>	Thread.State s = thread.getState();
1281	>	if (s == Thread.State.BLOCKED ||
1282	>	s == Thread.State.WAITING ||
1283	>	s == Thread.State.TIMED_WAITING)
1284	>	return;
1285	>	else if (s == Thread.State.TERMINATED)
1286	>	fail("Unexpected thread termination");
1287	>	else if (startTime == 0L)
1288	>	startTime = System.nanoTime();
1289	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1290	>	threadAssertTrue(thread.isAlive());
1291	>	fail("timed out waiting for thread to enter wait state");
1292		}
1293	<	catch(Exception e) {
1294	<	threadFail("unexpectedException");
1293	>	Thread.yield();
1294	>	}
1295	>	}
1296	>
1297	>	/**
1298	>	* Spin-waits up to the specified number of milliseconds for the given
1299	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1300	>	* and additionally satisfy the given condition.
1301	>	*/
1302	>	void waitForThreadToEnterWaitState(
1303	>	Thread thread, long timeoutMillis, Callable<Boolean> waitingForGodot) {
1304	>	long startTime = 0L;
1305	>	for (;;) {
1306	>	Thread.State s = thread.getState();
1307	>	if (s == Thread.State.BLOCKED ||
1308	>	s == Thread.State.WAITING ||
1309	>	s == Thread.State.TIMED_WAITING) {
1310	>	try {
1311	>	if (waitingForGodot.call())
1312	>	return;
1313	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1314	>	}
1315	>	else if (s == Thread.State.TERMINATED)
1316	>	fail("Unexpected thread termination");
1317	>	else if (startTime == 0L)
1318	>	startTime = System.nanoTime();
1319	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1320	>	threadAssertTrue(thread.isAlive());
1321	>	fail("timed out waiting for thread to enter wait state");
1322		}
1323	+	Thread.yield();
1324		}
1325		}
1326
1327	<	public class ShortInterruptedRunnable implements Runnable {
1328	<	public void run() {
1327	>	/**
1328	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1329	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1330	>	*/
1331	>	void waitForThreadToEnterWaitState(Thread thread) {
1332	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1333	>	}
1334	>
1335	>	/**
1336	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1337	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1338	>	* and additionally satisfy the given condition.
1339	>	*/
1340	>	void waitForThreadToEnterWaitState(
1341	>	Thread thread, Callable<Boolean> waitingForGodot) {
1342	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1343	>	}
1344	>
1345	>	/**
1346	>	* Returns the number of milliseconds since time given by
1347	>	* startNanoTime, which must have been previously returned from a
1348	>	* call to {@link System#nanoTime()}.
1349	>	*/
1350	>	static long millisElapsedSince(long startNanoTime) {
1351	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1352	>	}
1353	>
1354	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1355	>	//         long startTime = System.nanoTime();
1356	>	//         try {
1357	>	//             r.run();
1358	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1359	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1360	>	//             throw new AssertionFailedError("did not return promptly");
1361	>	//     }
1362	>
1363	>	//     void assertTerminatesPromptly(Runnable r) {
1364	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1365	>	//     }
1366	>
1367	>	/**
1368	>	* Checks that timed f.get() returns the expected value, and does not
1369	>	* wait for the timeout to elapse before returning.
1370	>	*/
1371	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1372	>	long startTime = System.nanoTime();
1373	>	try {
1374	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1375	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1376	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1377	>	throw new AssertionFailedError("timed get did not return promptly");
1378	>	}
1379	>
1380	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1381	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1382	>	}
1383	>
1384	>	/**
1385	>	* Returns a new started daemon Thread running the given runnable.
1386	>	*/
1387	>	Thread newStartedThread(Runnable runnable) {
1388	>	Thread t = new Thread(runnable);
1389	>	t.setDaemon(true);
1390	>	t.start();
1391	>	return t;
1392	>	}
1393	>
1394	>	/**
1395	>	* Waits for the specified time (in milliseconds) for the thread
1396	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1397	>	* the thread (in the hope that it may terminate later) and fails.
1398	>	*/
1399	>	void awaitTermination(Thread t, long timeoutMillis) {
1400	>	try {
1401	>	t.join(timeoutMillis);
1402	>	} catch (InterruptedException fail) {
1403	>	threadUnexpectedException(fail);
1404	>	} finally {
1405	>	if (t.getState() != Thread.State.TERMINATED) {
1406	>	t.interrupt();
1407	>	threadFail("timed out waiting for thread to terminate");
1408	>	}
1409	>	}
1410	>	}
1411	>
1412	>	/**
1413	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1414	>	* terminate (using {@link Thread#join(long)}), else interrupts
1415	>	* the thread (in the hope that it may terminate later) and fails.
1416	>	*/
1417	>	void awaitTermination(Thread t) {
1418	>	awaitTermination(t, LONG_DELAY_MS);
1419	>	}
1420	>
1421	>	// Some convenient Runnable classes
1422	>
1423	>	public abstract class CheckedRunnable implements Runnable {
1424	>	protected abstract void realRun() throws Throwable;
1425	>
1426	>	public final void run() {
1427		try {
1428	<	Thread.sleep(SHORT_DELAY_MS);
1429	<	threadFail("should throw IE");
1428	>	realRun();
1429	>	} catch (Throwable fail) {
1430	>	threadUnexpectedException(fail);
1431		}
1432	<	catch(InterruptedException success) {
1432	>	}
1433	>	}
1434	>
1435	>	public abstract class RunnableShouldThrow implements Runnable {
1436	>	protected abstract void realRun() throws Throwable;
1437	>
1438	>	final Class<?> exceptionClass;
1439	>
1440	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1441	>	this.exceptionClass = exceptionClass;
1442	>	}
1443	>
1444	>	public final void run() {
1445	>	try {
1446	>	realRun();
1447	>	threadShouldThrow(exceptionClass.getSimpleName());
1448	>	} catch (Throwable t) {
1449	>	if (! exceptionClass.isInstance(t))
1450	>	threadUnexpectedException(t);
1451		}
1452		}
1453		}
1454
1455	<	public class SmallRunnable implements Runnable {
1456	<	public void run() {
1455	>	public abstract class ThreadShouldThrow extends Thread {
1456	>	protected abstract void realRun() throws Throwable;
1457	>
1458	>	final Class<?> exceptionClass;
1459	>
1460	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1461	>	this.exceptionClass = exceptionClass;
1462	>	}
1463	>
1464	>	public final void run() {
1465		try {
1466	<	Thread.sleep(SMALL_DELAY_MS);
1466	>	realRun();
1467	>	threadShouldThrow(exceptionClass.getSimpleName());
1468	>	} catch (Throwable t) {
1469	>	if (! exceptionClass.isInstance(t))
1470	>	threadUnexpectedException(t);
1471		}
1472	<	catch(Exception e) {
1473	<	threadFail("unexpectedException");
1472	>	}
1473	>	}
1474	>
1475	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1476	>	protected abstract void realRun() throws Throwable;
1477	>
1478	>	public final void run() {
1479	>	try {
1480	>	realRun();
1481	>	threadShouldThrow("InterruptedException");
1482	>	} catch (InterruptedException success) {
1483	>	threadAssertFalse(Thread.interrupted());
1484	>	} catch (Throwable fail) {
1485	>	threadUnexpectedException(fail);
1486		}
1487		}
1488		}
1489
1490	<	public class SmallCallable implements Callable {
1491	<	public Object call() {
1490	>	public abstract class CheckedCallable<T> implements Callable<T> {
1491	>	protected abstract T realCall() throws Throwable;
1492	>
1493	>	public final T call() {
1494		try {
1495	<	Thread.sleep(SMALL_DELAY_MS);
1495	>	return realCall();
1496	>	} catch (Throwable fail) {
1497	>	threadUnexpectedException(fail);
1498	>	return null;
1499		}
1500	<	catch(Exception e) {
1501	<	threadFail("unexpectedException");
1500	>	}
1501	>	}
1502	>
1503	>	public abstract class CheckedInterruptedCallable<T>
1504	>	implements Callable<T> {
1505	>	protected abstract T realCall() throws Throwable;
1506	>
1507	>	public final T call() {
1508	>	try {
1509	>	T result = realCall();
1510	>	threadShouldThrow("InterruptedException");
1511	>	return result;
1512	>	} catch (InterruptedException success) {
1513	>	threadAssertFalse(Thread.interrupted());
1514	>	} catch (Throwable fail) {
1515	>	threadUnexpectedException(fail);
1516		}
1517	+	return null;
1518	+	}
1519	+	}
1520	+
1521	+	public static class NoOpRunnable implements Runnable {
1522	+	public void run() {}
1523	+	}
1524	+
1525	+	public static class NoOpCallable implements Callable {
1526	+	public Object call() { return Boolean.TRUE; }
1527	+	}
1528	+
1529	+	public static final String TEST_STRING = "a test string";
1530	+
1531	+	public static class StringTask implements Callable<String> {
1532	+	final String value;
1533	+	public StringTask() { this(TEST_STRING); }
1534	+	public StringTask(String value) { this.value = value; }
1535	+	public String call() { return value; }
1536	+	}
1537	+
1538	+	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1539	+	return new CheckedCallable<String>() {
1540	+	protected String realCall() {
1541	+	try {
1542	+	latch.await();
1543	+	} catch (InterruptedException quittingTime) {}
1544	+	return TEST_STRING;
1545	+	}};
1546	+	}
1547	+
1548	+	public Runnable countDowner(final CountDownLatch latch) {
1549	+	return new CheckedRunnable() {
1550	+	public void realRun() throws InterruptedException {
1551	+	latch.countDown();
1552	+	}};
1553	+	}
1554	+
1555	+	class LatchAwaiter extends CheckedRunnable {
1556	+	static final int NEW = 0;
1557	+	static final int RUNNING = 1;
1558	+	static final int DONE = 2;
1559	+	final CountDownLatch latch;
1560	+	int state = NEW;
1561	+	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1562	+	public void realRun() throws InterruptedException {
1563	+	state = 1;
1564	+	await(latch);
1565	+	state = 2;
1566	+	}
1567	+	}
1568	+
1569	+	public LatchAwaiter awaiter(CountDownLatch latch) {
1570	+	return new LatchAwaiter(latch);
1571	+	}
1572	+
1573	+	public void await(CountDownLatch latch, long timeoutMillis) {
1574	+	try {
1575	+	if (!latch.await(timeoutMillis, MILLISECONDS))
1576	+	fail("timed out waiting for CountDownLatch for "
1577	+	+ (timeoutMillis/1000) + " sec");
1578	+	} catch (Throwable fail) {
1579	+	threadUnexpectedException(fail);
1580	+	}
1581	+	}
1582	+
1583	+	public void await(CountDownLatch latch) {
1584	+	await(latch, LONG_DELAY_MS);
1585	+	}
1586	+
1587	+	public void await(Semaphore semaphore) {
1588	+	try {
1589	+	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1590	+	fail("timed out waiting for Semaphore for "
1591	+	+ (LONG_DELAY_MS/1000) + " sec");
1592	+	} catch (Throwable fail) {
1593	+	threadUnexpectedException(fail);
1594	+	}
1595	+	}
1596	+
1597	+	public void await(CyclicBarrier barrier) {
1598	+	try {
1599	+	barrier.await(LONG_DELAY_MS, MILLISECONDS);
1600	+	} catch (Throwable fail) {
1601	+	threadUnexpectedException(fail);
1602	+	}
1603	+	}
1604	+
1605	+	//     /**
1606	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1607	+	//      */
1608	+	//     public void await(AtomicBoolean flag) {
1609	+	//         await(flag, LONG_DELAY_MS);
1610	+	//     }
1611	+
1612	+	//     /**
1613	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1614	+	//      */
1615	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1616	+	//         long startTime = System.nanoTime();
1617	+	//         while (!flag.get()) {
1618	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1619	+	//                 throw new AssertionFailedError("timed out");
1620	+	//             Thread.yield();
1621	+	//         }
1622	+	//     }
1623	+
1624	+	public static class NPETask implements Callable<String> {
1625	+	public String call() { throw new NullPointerException(); }
1626	+	}
1627	+
1628	+	public static class CallableOne implements Callable<Integer> {
1629	+	public Integer call() { return one; }
1630	+	}
1631	+
1632	+	public class ShortRunnable extends CheckedRunnable {
1633	+	protected void realRun() throws Throwable {
1634	+	delay(SHORT_DELAY_MS);
1635	+	}
1636	+	}
1637	+
1638	+	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1639	+	protected void realRun() throws InterruptedException {
1640	+	delay(SHORT_DELAY_MS);
1641	+	}
1642	+	}
1643	+
1644	+	public class SmallRunnable extends CheckedRunnable {
1645	+	protected void realRun() throws Throwable {
1646	+	delay(SMALL_DELAY_MS);
1647	+	}
1648	+	}
1649	+
1650	+	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1651	+	protected void realRun() {
1652	+	try {
1653	+	delay(SMALL_DELAY_MS);
1654	+	} catch (InterruptedException ok) {}
1655	+	}
1656	+	}
1657	+
1658	+	public class SmallCallable extends CheckedCallable {
1659	+	protected Object realCall() throws InterruptedException {
1660	+	delay(SMALL_DELAY_MS);
1661		return Boolean.TRUE;
1662		}
1663		}
1664
1665	<	public class SmallInterruptedRunnable implements Runnable {
1665	>	public class MediumRunnable extends CheckedRunnable {
1666	>	protected void realRun() throws Throwable {
1667	>	delay(MEDIUM_DELAY_MS);
1668	>	}
1669	>	}
1670	>
1671	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1672	>	protected void realRun() throws InterruptedException {
1673	>	delay(MEDIUM_DELAY_MS);
1674	>	}
1675	>	}
1676	>
1677	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1678	>	return new CheckedRunnable() {
1679	>	protected void realRun() {
1680	>	try {
1681	>	delay(timeoutMillis);
1682	>	} catch (InterruptedException ok) {}
1683	>	}};
1684	>	}
1685	>
1686	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1687	>	protected void realRun() {
1688	>	try {
1689	>	delay(MEDIUM_DELAY_MS);
1690	>	} catch (InterruptedException ok) {}
1691	>	}
1692	>	}
1693	>
1694	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1695	>	protected void realRun() {
1696	>	try {
1697	>	delay(LONG_DELAY_MS);
1698	>	} catch (InterruptedException ok) {}
1699	>	}
1700	>	}
1701	>
1702	>	/**
1703	>	* For use as ThreadFactory in constructors
1704	>	*/
1705	>	public static class SimpleThreadFactory implements ThreadFactory {
1706	>	public Thread newThread(Runnable r) {
1707	>	return new Thread(r);
1708	>	}
1709	>	}
1710	>
1711	>	public interface TrackedRunnable extends Runnable {
1712	>	boolean isDone();
1713	>	}
1714	>
1715	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1716	>	return new TrackedRunnable() {
1717	>	private volatile boolean done = false;
1718	>	public boolean isDone() { return done; }
1719	>	public void run() {
1720	>	try {
1721	>	delay(timeoutMillis);
1722	>	done = true;
1723	>	} catch (InterruptedException ok) {}
1724	>	}
1725	>	};
1726	>	}
1727	>
1728	>	public static class TrackedShortRunnable implements Runnable {
1729	>	public volatile boolean done = false;
1730		public void run() {
1731		try {
1732	<	Thread.sleep(SMALL_DELAY_MS);
1733	<	threadFail("should throw IE");
1734	<	}
237	<	catch(InterruptedException success) {
238	<	}
1732	>	delay(SHORT_DELAY_MS);
1733	>	done = true;
1734	>	} catch (InterruptedException ok) {}
1735		}
1736		}
1737
1738	+	public static class TrackedSmallRunnable implements Runnable {
1739	+	public volatile boolean done = false;
1740	+	public void run() {
1741	+	try {
1742	+	delay(SMALL_DELAY_MS);
1743	+	done = true;
1744	+	} catch (InterruptedException ok) {}
1745	+	}
1746	+	}
1747
1748	<	public class MediumRunnable implements Runnable {
1748	>	public static class TrackedMediumRunnable implements Runnable {
1749	>	public volatile boolean done = false;
1750		public void run() {
1751		try {
1752	<	Thread.sleep(MEDIUM_DELAY_MS);
1753	<	}
1754	<	catch(Exception e) {
249	<	threadFail("unexpectedException");
250	<	}
1752	>	delay(MEDIUM_DELAY_MS);
1753	>	done = true;
1754	>	} catch (InterruptedException ok) {}
1755		}
1756		}
1757
1758	<	public class MediumInterruptedRunnable implements Runnable {
1758	>	public static class TrackedLongRunnable implements Runnable {
1759	>	public volatile boolean done = false;
1760		public void run() {
1761		try {
1762	<	Thread.sleep(MEDIUM_DELAY_MS);
1763	<	threadFail("should throw IE");
1762	>	delay(LONG_DELAY_MS);
1763	>	done = true;
1764	>	} catch (InterruptedException ok) {}
1765	>	}
1766	>	}
1767	>
1768	>	public static class TrackedNoOpRunnable implements Runnable {
1769	>	public volatile boolean done = false;
1770	>	public void run() {
1771	>	done = true;
1772	>	}
1773	>	}
1774	>
1775	>	public static class TrackedCallable implements Callable {
1776	>	public volatile boolean done = false;
1777	>	public Object call() {
1778	>	try {
1779	>	delay(SMALL_DELAY_MS);
1780	>	done = true;
1781	>	} catch (InterruptedException ok) {}
1782	>	return Boolean.TRUE;
1783	>	}
1784	>	}
1785	>
1786	>	/**
1787	>	* Analog of CheckedRunnable for RecursiveAction
1788	>	*/
1789	>	public abstract class CheckedRecursiveAction extends RecursiveAction {
1790	>	protected abstract void realCompute() throws Throwable;
1791	>
1792	>	@Override protected final void compute() {
1793	>	try {
1794	>	realCompute();
1795	>	} catch (Throwable fail) {
1796	>	threadUnexpectedException(fail);
1797		}
1798	<	catch(InterruptedException success) {
1798	>	}
1799	>	}
1800	>
1801	>	/**
1802	>	* Analog of CheckedCallable for RecursiveTask
1803	>	*/
1804	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1805	>	protected abstract T realCompute() throws Throwable;
1806	>
1807	>	@Override protected final T compute() {
1808	>	try {
1809	>	return realCompute();
1810	>	} catch (Throwable fail) {
1811	>	threadUnexpectedException(fail);
1812	>	return null;
1813		}
1814		}
1815		}
1816
1817	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1818	<	public void run() {
1817	>	/**
1818	>	* For use as RejectedExecutionHandler in constructors
1819	>	*/
1820	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1821	>	public void rejectedExecution(Runnable r,
1822	>	ThreadPoolExecutor executor) {}
1823	>	}
1824	>
1825	>	/**
1826	>	* A CyclicBarrier that uses timed await and fails with
1827	>	* AssertionFailedErrors instead of throwing checked exceptions.
1828	>	*/
1829	>	public static class CheckedBarrier extends CyclicBarrier {
1830	>	public CheckedBarrier(int parties) { super(parties); }
1831	>
1832	>	public int await() {
1833		try {
1834	<	Thread.sleep(MEDIUM_DELAY_MS);
1834	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1835	>	} catch (TimeoutException timedOut) {
1836	>	throw new AssertionFailedError("timed out");
1837	>	} catch (Exception fail) {
1838	>	AssertionFailedError afe =
1839	>	new AssertionFailedError("Unexpected exception: " + fail);
1840	>	afe.initCause(fail);
1841	>	throw afe;
1842		}
1843	<	catch(InterruptedException success) {
1843	>	}
1844	>	}
1845	>
1846	>	void checkEmpty(BlockingQueue q) {
1847	>	try {
1848	>	assertTrue(q.isEmpty());
1849	>	assertEquals(0, q.size());
1850	>	assertNull(q.peek());
1851	>	assertNull(q.poll());
1852	>	assertNull(q.poll(0, MILLISECONDS));
1853	>	assertEquals(q.toString(), "[]");
1854	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1855	>	assertFalse(q.iterator().hasNext());
1856	>	try {
1857	>	q.element();
1858	>	shouldThrow();
1859	>	} catch (NoSuchElementException success) {}
1860	>	try {
1861	>	q.iterator().next();
1862	>	shouldThrow();
1863	>	} catch (NoSuchElementException success) {}
1864	>	try {
1865	>	q.remove();
1866	>	shouldThrow();
1867	>	} catch (NoSuchElementException success) {}
1868	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1869	>	}
1870	>
1871	>	void assertSerialEquals(Object x, Object y) {
1872	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1873	>	}
1874	>
1875	>	void assertNotSerialEquals(Object x, Object y) {
1876	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1877	>	}
1878	>
1879	>	byte[] serialBytes(Object o) {
1880	>	try {
1881	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1882	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1883	>	oos.writeObject(o);
1884	>	oos.flush();
1885	>	oos.close();
1886	>	return bos.toByteArray();
1887	>	} catch (Throwable fail) {
1888	>	threadUnexpectedException(fail);
1889	>	return new byte[0];
1890	>	}
1891	>	}
1892	>
1893	>	void assertImmutable(final Object o) {
1894	>	if (o instanceof Collection) {
1895	>	assertThrows(
1896	>	UnsupportedOperationException.class,
1897	>	new Runnable() { public void run() {
1898	>	((Collection) o).add(null);}});
1899	>	}
1900	>	}
1901	>
1902	>	@SuppressWarnings("unchecked")
1903	>	<T> T serialClone(T o) {
1904	>	try {
1905	>	ObjectInputStream ois = new ObjectInputStream
1906	>	(new ByteArrayInputStream(serialBytes(o)));
1907	>	T clone = (T) ois.readObject();
1908	>	if (o == clone) assertImmutable(o);
1909	>	assertSame(o.getClass(), clone.getClass());
1910	>	return clone;
1911	>	} catch (Throwable fail) {
1912	>	threadUnexpectedException(fail);
1913	>	return null;
1914	>	}
1915	>	}
1916	>
1917	>	/**
1918	>	* A version of serialClone that leaves error handling (for
1919	>	* e.g. NotSerializableException) up to the caller.
1920	>	*/
1921	>	@SuppressWarnings("unchecked")
1922	>	<T> T serialClonePossiblyFailing(T o)
1923	>	throws ReflectiveOperationException, java.io.IOException {
1924	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1925	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1926	>	oos.writeObject(o);
1927	>	oos.flush();
1928	>	oos.close();
1929	>	ObjectInputStream ois = new ObjectInputStream
1930	>	(new ByteArrayInputStream(bos.toByteArray()));
1931	>	T clone = (T) ois.readObject();
1932	>	if (o == clone) assertImmutable(o);
1933	>	assertSame(o.getClass(), clone.getClass());
1934	>	return clone;
1935	>	}
1936	>
1937	>	/**
1938	>	* If o implements Cloneable and has a public clone method,
1939	>	* returns a clone of o, else null.
1940	>	*/
1941	>	@SuppressWarnings("unchecked")
1942	>	<T> T cloneableClone(T o) {
1943	>	if (!(o instanceof Cloneable)) return null;
1944	>	final T clone;
1945	>	try {
1946	>	clone = (T) o.getClass().getMethod("clone").invoke(o);
1947	>	} catch (NoSuchMethodException ok) {
1948	>	return null;
1949	>	} catch (ReflectiveOperationException unexpected) {
1950	>	throw new Error(unexpected);
1951	>	}
1952	>	assertNotSame(o, clone); // not 100% guaranteed by spec
1953	>	assertSame(o.getClass(), clone.getClass());
1954	>	return clone;
1955	>	}
1956	>
1957	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1958	>	Runnable... throwingActions) {
1959	>	for (Runnable throwingAction : throwingActions) {
1960	>	boolean threw = false;
1961	>	try { throwingAction.run(); }
1962	>	catch (Throwable t) {
1963	>	threw = true;
1964	>	if (!expectedExceptionClass.isInstance(t)) {
1965	>	AssertionFailedError afe =
1966	>	new AssertionFailedError
1967	>	("Expected " + expectedExceptionClass.getName() +
1968	>	", got " + t.getClass().getName());
1969	>	afe.initCause(t);
1970	>	threadUnexpectedException(afe);
1971	>	}
1972		}
1973	+	if (!threw)
1974	+	shouldThrow(expectedExceptionClass.getName());
1975		}
1976		}
1977	<
1977	>
1978	>	public void assertIteratorExhausted(Iterator<?> it) {
1979	>	try {
1980	>	it.next();
1981	>	shouldThrow();
1982	>	} catch (NoSuchElementException success) {}
1983	>	assertFalse(it.hasNext());
1984	>	}
1985	>
1986	>	public <T> Callable<T> callableThrowing(final Exception ex) {
1987	>	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1988	>	}
1989	>
1990	>	public Runnable runnableThrowing(final RuntimeException ex) {
1991	>	return new Runnable() { public void run() { throw ex; }};
1992	>	}
1993	>
1994	>	/** A reusable thread pool to be shared by tests. */
1995	>	static final ExecutorService cachedThreadPool =
1996	>	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1997	>	1000L, MILLISECONDS,
1998	>	new SynchronousQueue<Runnable>());
1999	>
2000	>	static <T> void shuffle(T[] array) {
2001	>	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
2002	>	}
2003		}

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