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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.1 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.198 by jsr166, Wed Jul 27 17:16:23 2016 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
12	>	* @modules java.management
13	>	* @build *
14	>	* @run junit/othervm/timeout=1000 -Djsr166.testImplementationDetails=true JSR166TestCase
15	>	* @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=0 -Djsr166.testImplementationDetails=true JSR166TestCase
16	>	* @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=1 -Djava.util.secureRandomSeed=true JSR166TestCase
17	>	*/
18
19	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
20	+	import static java.util.concurrent.TimeUnit.MINUTES;
21	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
22	+
23	+	import java.io.ByteArrayInputStream;
24	+	import java.io.ByteArrayOutputStream;
25	+	import java.io.ObjectInputStream;
26	+	import java.io.ObjectOutputStream;
27	+	import java.lang.management.ManagementFactory;
28	+	import java.lang.management.ThreadInfo;
29	+	import java.lang.management.ThreadMXBean;
30	+	import java.lang.reflect.Constructor;
31	+	import java.lang.reflect.Method;
32	+	import java.lang.reflect.Modifier;
33	+	import java.nio.file.Files;
34	+	import java.nio.file.Paths;
35	+	import java.security.CodeSource;
36	+	import java.security.Permission;
37	+	import java.security.PermissionCollection;
38	+	import java.security.Permissions;
39	+	import java.security.Policy;
40	+	import java.security.ProtectionDomain;
41	+	import java.security.SecurityPermission;
42	+	import java.util.ArrayList;
43	+	import java.util.Arrays;
44	+	import java.util.Date;
45	+	import java.util.Enumeration;
46	+	import java.util.Iterator;
47	+	import java.util.List;
48	+	import java.util.NoSuchElementException;
49	+	import java.util.PropertyPermission;
50	+	import java.util.concurrent.BlockingQueue;
51	+	import java.util.concurrent.Callable;
52	+	import java.util.concurrent.CountDownLatch;
53	+	import java.util.concurrent.CyclicBarrier;
54	+	import java.util.concurrent.ExecutionException;
55	+	import java.util.concurrent.Executors;
56	+	import java.util.concurrent.ExecutorService;
57	+	import java.util.concurrent.ForkJoinPool;
58	+	import java.util.concurrent.Future;
59	+	import java.util.concurrent.RecursiveAction;
60	+	import java.util.concurrent.RecursiveTask;
61	+	import java.util.concurrent.RejectedExecutionHandler;
62	+	import java.util.concurrent.Semaphore;
63	+	import java.util.concurrent.SynchronousQueue;
64	+	import java.util.concurrent.ThreadFactory;
65	+	import java.util.concurrent.ThreadPoolExecutor;
66	+	import java.util.concurrent.TimeoutException;
67	+	import java.util.concurrent.atomic.AtomicBoolean;
68	+	import java.util.concurrent.atomic.AtomicReference;
69	+	import java.util.regex.Matcher;
70	+	import java.util.regex.Pattern;
71	+
72	+	import junit.framework.AssertionFailedError;
73	+	import junit.framework.Test;
74	+	import junit.framework.TestCase;
75	+	import junit.framework.TestResult;
76	+	import junit.framework.TestSuite;
77
78		/**
79	<	* Base class for JSR166 Junit TCK tests.  Defines some constants and
80	<	* utility methods, as well as a simple framework for helping to make
81	<	* sure that assertions failing in generated threads cause the
82	<	* associated test that generated them to itself fail (which JUnit doe
83	<	* not otherwise arrange).  The rules for creating such tests are:
79	>	* Base class for JSR166 Junit TCK tests.  Defines some constants,
80	>	* utility methods and classes, as well as a simple framework for
81	>	* helping to make sure that assertions failing in generated threads
82	>	* cause the associated test that generated them to itself fail (which
83	>	* JUnit does not otherwise arrange).  The rules for creating such
84	>	* tests are:
85		*
86		* <ol>
87		*
88	<	* <li> All assertions in code running in generated threads must use
89	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
90	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
91	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
88	>	* <li>All assertions in code running in generated threads must use
89	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
90	>	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
91	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
92		* particularly recommended) for other code to use these forms too.
93		* Only the most typically used JUnit assertion methods are defined
94	<	* this way, but enough to live with.</li>
94	>	* this way, but enough to live with.
95		*
96	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
97	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
96	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
97	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
98		* them. These methods are used to clear and check for thread
99	<	* assertion failures.</li>
99	>	* assertion failures.
100		*
101	<	* <li>All delays and timeouts must use one of the constants {@link
102	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
103	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
104	<	* discriminatable from zero time, and always allows enough time for
105	<	* the small amounts of computation (creating a thread, calling a few
101	>	* <li>All delays and timeouts must use one of the constants {@code
102	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
103	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
104	>	* discriminable from zero time, and always allows enough time for the
105	>	* small amounts of computation (creating a thread, calling a few
106		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
107		* is always discriminable as larger than SHORT and smaller than
108		* MEDIUM.  And so on. These constants are set to conservative values,
109	<	* (100, 500, 1000, 5000 MS) but even so, if there is ever any doubt,
110	<	* they can all be increased in one spot to rerun tests on slower
111	<	* platforms</li>
112	<	*
113	<	* <li> All threads generated must be joined inside each test case
114	<	* method (or <tt>fail</tt> to do so) before returning from the
115	<	* method. The {@link joinPool} method can be used to do this when
51	<	* using Executors.</li>
109	>	* but even so, if there is ever any doubt, they can all be increased
110	>	* in one spot to rerun tests on slower platforms.
111	>	*
112	>	* <li>All threads generated must be joined inside each test case
113	>	* method (or {@code fail} to do so) before returning from the
114	>	* method. The {@code joinPool} method can be used to do this when
115	>	* using Executors.
116		*
117		* </ol>
118	+	*
119	+	* <p><b>Other notes</b>
120	+	* <ul>
121	+	*
122	+	* <li>Usually, there is one testcase method per JSR166 method
123	+	* covering "normal" operation, and then as many exception-testing
124	+	* methods as there are exceptions the method can throw. Sometimes
125	+	* there are multiple tests per JSR166 method when the different
126	+	* "normal" behaviors differ significantly. And sometimes testcases
127	+	* cover multiple methods when they cannot be tested in isolation.
128	+	*
129	+	* <li>The documentation style for testcases is to provide as javadoc
130	+	* a simple sentence or two describing the property that the testcase
131	+	* method purports to test. The javadocs do not say anything about how
132	+	* the property is tested. To find out, read the code.
133	+	*
134	+	* <li>These tests are "conformance tests", and do not attempt to
135	+	* test throughput, latency, scalability or other performance factors
136	+	* (see the separate "jtreg" tests for a set intended to check these
137	+	* for the most central aspects of functionality.) So, most tests use
138	+	* the smallest sensible numbers of threads, collection sizes, etc
139	+	* needed to check basic conformance.
140	+	*
141	+	* <li>The test classes currently do not declare inclusion in
142	+	* any particular package to simplify things for people integrating
143	+	* them in TCK test suites.
144	+	*
145	+	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
146	+	* runs all JSR166 unit tests.
147	+	*
148	+	* </ul>
149		*/
150		public class JSR166TestCase extends TestCase {
151	+	private static final boolean useSecurityManager =
152	+	Boolean.getBoolean("jsr166.useSecurityManager");
153	+
154	+	protected static final boolean expensiveTests =
155	+	Boolean.getBoolean("jsr166.expensiveTests");
156	+
157	+	/**
158	+	* If true, also run tests that are not part of the official tck
159	+	* because they test unspecified implementation details.
160	+	*/
161	+	protected static final boolean testImplementationDetails =
162	+	Boolean.getBoolean("jsr166.testImplementationDetails");
163	+
164	+	/**
165	+	* If true, report on stdout all "slow" tests, that is, ones that
166	+	* take more than profileThreshold milliseconds to execute.
167	+	*/
168	+	private static final boolean profileTests =
169	+	Boolean.getBoolean("jsr166.profileTests");
170	+
171	+	/**
172	+	* The number of milliseconds that tests are permitted for
173	+	* execution without being reported, when profileTests is set.
174	+	*/
175	+	private static final long profileThreshold =
176	+	Long.getLong("jsr166.profileThreshold", 100);
177	+
178	+	/**
179	+	* The number of repetitions per test (for tickling rare bugs).
180	+	*/
181	+	private static final int runsPerTest =
182	+	Integer.getInteger("jsr166.runsPerTest", 1);
183	+
184	+	/**
185	+	* The number of repetitions of the test suite (for finding leaks?).
186	+	*/
187	+	private static final int suiteRuns =
188	+	Integer.getInteger("jsr166.suiteRuns", 1);
189	+
190	+	/**
191	+	* Returns the value of the system property, or NaN if not defined.
192	+	*/
193	+	private static float systemPropertyValue(String name) {
194	+	String floatString = System.getProperty(name);
195	+	if (floatString == null)
196	+	return Float.NaN;
197	+	try {
198	+	return Float.parseFloat(floatString);
199	+	} catch (NumberFormatException ex) {
200	+	throw new IllegalArgumentException(
201	+	String.format("Bad float value in system property %s=%s",
202	+	name, floatString));
203	+	}
204	+	}
205	+
206	+	/**
207	+	* The scaling factor to apply to standard delays used in tests.
208	+	* May be initialized from any of:
209	+	* - the "jsr166.delay.factor" system property
210	+	* - the "test.timeout.factor" system property (as used by jtreg)
211	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
212	+	* - hard-coded fuzz factor when using a known slowpoke VM
213	+	*/
214	+	private static final float delayFactor = delayFactor();
215	+
216	+	private static float delayFactor() {
217	+	float x;
218	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
219	+	return x;
220	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
221	+	return x;
222	+	String prop = System.getProperty("java.vm.version");
223	+	if (prop != null && prop.matches(".*debug.*"))
224	+	return 4.0f; // How much slower is fastdebug than product?!
225	+	return 1.0f;
226	+	}
227	+
228	+	public JSR166TestCase() { super(); }
229	+	public JSR166TestCase(String name) { super(name); }
230	+
231	+	/**
232	+	* A filter for tests to run, matching strings of the form
233	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
234	+	* Usefully combined with jsr166.runsPerTest.
235	+	*/
236	+	private static final Pattern methodFilter = methodFilter();
237	+
238	+	private static Pattern methodFilter() {
239	+	String regex = System.getProperty("jsr166.methodFilter");
240	+	return (regex == null) ? null : Pattern.compile(regex);
241	+	}
242	+
243	+	// Instrumentation to debug very rare, but very annoying hung test runs.
244	+	static volatile TestCase currentTestCase;
245	+	// static volatile int currentRun = 0;
246	+	static {
247	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
248	+	// Avoid spurious reports with enormous runsPerTest.
249	+	// A single test case run should never take more than 1 second.
250	+	// But let's cap it at the high end too ...
251	+	final int timeoutMinutes =
252	+	Math.min(15, Math.max(runsPerTest / 60, 1));
253	+	for (TestCase lastTestCase = currentTestCase;;) {
254	+	try { MINUTES.sleep(timeoutMinutes); }
255	+	catch (InterruptedException unexpected) { break; }
256	+	if (lastTestCase == currentTestCase) {
257	+	System.err.printf(
258	+	"Looks like we're stuck running test: %s%n",
259	+	lastTestCase);
260	+	//                     System.err.printf(
261	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
262	+	//                         lastTestCase, currentRun, runsPerTest);
263	+	//                     System.err.println("availableProcessors=" +
264	+	//                         Runtime.getRuntime().availableProcessors());
265	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
266	+	dumpTestThreads();
267	+	// one stack dump is probably enough; more would be spam
268	+	break;
269	+	}
270	+	lastTestCase = currentTestCase;
271	+	}}};
272	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
273	+	thread.setDaemon(true);
274	+	thread.start();
275	+	}
276	+
277	+	//     public static String cpuModel() {
278	+	//         try {
279	+	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
280	+	//                 .matcher(new String(
281	+	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
282	+	//             matcher.find();
283	+	//             return matcher.group(1);
284	+	//         } catch (Exception ex) { return null; }
285	+	//     }
286	+
287	+	public void runBare() throws Throwable {
288	+	currentTestCase = this;
289	+	if (methodFilter == null
290	+	|| methodFilter.matcher(toString()).find())
291	+	super.runBare();
292	+	}
293	+
294	+	protected void runTest() throws Throwable {
295	+	for (int i = 0; i < runsPerTest; i++) {
296	+	// currentRun = i;
297	+	if (profileTests)
298	+	runTestProfiled();
299	+	else
300	+	super.runTest();
301	+	}
302	+	}
303	+
304	+	protected void runTestProfiled() throws Throwable {
305	+	for (int i = 0; i < 2; i++) {
306	+	long startTime = System.nanoTime();
307	+	super.runTest();
308	+	long elapsedMillis = millisElapsedSince(startTime);
309	+	if (elapsedMillis < profileThreshold)
310	+	break;
311	+	// Never report first run of any test; treat it as a
312	+	// warmup run, notably to trigger all needed classloading,
313	+	if (i > 0)
314	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
315	+	}
316	+	}
317	+
318	+	/**
319	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
320	+	*/
321	+	public static void main(String[] args) {
322	+	main(suite(), args);
323	+	}
324	+
325	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
326	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
327	+	long runTime;
328	+	public void startTest(Test test) {}
329	+	protected void printHeader(long runTime) {
330	+	this.runTime = runTime; // defer printing for later
331	+	}
332	+	protected void printFooter(TestResult result) {
333	+	if (result.wasSuccessful()) {
334	+	getWriter().println("OK (" + result.runCount() + " tests)"
335	+	+ "  Time: " + elapsedTimeAsString(runTime));
336	+	} else {
337	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
338	+	super.printFooter(result);
339	+	}
340	+	}
341	+	}
342	+
343	+	/**
344	+	* Returns a TestRunner that doesn't bother with unnecessary
345	+	* fluff, like printing a "." for each test case.
346	+	*/
347	+	static junit.textui.TestRunner newPithyTestRunner() {
348	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
349	+	runner.setPrinter(new PithyResultPrinter(System.out));
350	+	return runner;
351	+	}
352	+
353	+	/**
354	+	* Runs all unit tests in the given test suite.
355	+	* Actual behavior influenced by jsr166.* system properties.
356	+	*/
357	+	static void main(Test suite, String[] args) {
358	+	if (useSecurityManager) {
359	+	System.err.println("Setting a permissive security manager");
360	+	Policy.setPolicy(permissivePolicy());
361	+	System.setSecurityManager(new SecurityManager());
362	+	}
363	+	for (int i = 0; i < suiteRuns; i++) {
364	+	TestResult result = newPithyTestRunner().doRun(suite);
365	+	if (!result.wasSuccessful())
366	+	System.exit(1);
367	+	System.gc();
368	+	System.runFinalization();
369	+	}
370	+	}
371	+
372	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
373	+	TestSuite suite = new TestSuite();
374	+	for (Object suiteOrClass : suiteOrClasses) {
375	+	if (suiteOrClass instanceof TestSuite)
376	+	suite.addTest((TestSuite) suiteOrClass);
377	+	else if (suiteOrClass instanceof Class)
378	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
379	+	else
380	+	throw new ClassCastException("not a test suite or class");
381	+	}
382	+	return suite;
383	+	}
384	+
385	+	public static void addNamedTestClasses(TestSuite suite,
386	+	String... testClassNames) {
387	+	for (String testClassName : testClassNames) {
388	+	try {
389	+	Class<?> testClass = Class.forName(testClassName);
390	+	Method m = testClass.getDeclaredMethod("suite",
391	+	new Class<?>[0]);
392	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
393	+	} catch (Exception e) {
394	+	throw new Error("Missing test class", e);
395	+	}
396	+	}
397	+	}
398	+
399	+	public static final double JAVA_CLASS_VERSION;
400	+	public static final String JAVA_SPECIFICATION_VERSION;
401	+	static {
402	+	try {
403	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
404	+	new java.security.PrivilegedAction<Double>() {
405	+	public Double run() {
406	+	return Double.valueOf(System.getProperty("java.class.version"));}});
407	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
408	+	new java.security.PrivilegedAction<String>() {
409	+	public String run() {
410	+	return System.getProperty("java.specification.version");}});
411	+	} catch (Throwable t) {
412	+	throw new Error(t);
413	+	}
414	+	}
415	+
416	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
417	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
418	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
419	+	public static boolean atLeastJava9() {
420	+	return JAVA_CLASS_VERSION >= 53.0
421	+	// As of 2015-09, java9 still uses 52.0 class file version
422	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
423	+	}
424	+	public static boolean atLeastJava10() {
425	+	return JAVA_CLASS_VERSION >= 54.0
426	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
427	+	}
428	+
429	+	/**
430	+	* Collects all JSR166 unit tests as one suite.
431	+	*/
432	+	public static Test suite() {
433	+	// Java7+ test classes
434	+	TestSuite suite = newTestSuite(
435	+	ForkJoinPoolTest.suite(),
436	+	ForkJoinTaskTest.suite(),
437	+	RecursiveActionTest.suite(),
438	+	RecursiveTaskTest.suite(),
439	+	LinkedTransferQueueTest.suite(),
440	+	PhaserTest.suite(),
441	+	ThreadLocalRandomTest.suite(),
442	+	AbstractExecutorServiceTest.suite(),
443	+	AbstractQueueTest.suite(),
444	+	AbstractQueuedSynchronizerTest.suite(),
445	+	AbstractQueuedLongSynchronizerTest.suite(),
446	+	ArrayBlockingQueueTest.suite(),
447	+	ArrayDequeTest.suite(),
448	+	AtomicBooleanTest.suite(),
449	+	AtomicIntegerArrayTest.suite(),
450	+	AtomicIntegerFieldUpdaterTest.suite(),
451	+	AtomicIntegerTest.suite(),
452	+	AtomicLongArrayTest.suite(),
453	+	AtomicLongFieldUpdaterTest.suite(),
454	+	AtomicLongTest.suite(),
455	+	AtomicMarkableReferenceTest.suite(),
456	+	AtomicReferenceArrayTest.suite(),
457	+	AtomicReferenceFieldUpdaterTest.suite(),
458	+	AtomicReferenceTest.suite(),
459	+	AtomicStampedReferenceTest.suite(),
460	+	ConcurrentHashMapTest.suite(),
461	+	ConcurrentLinkedDequeTest.suite(),
462	+	ConcurrentLinkedQueueTest.suite(),
463	+	ConcurrentSkipListMapTest.suite(),
464	+	ConcurrentSkipListSubMapTest.suite(),
465	+	ConcurrentSkipListSetTest.suite(),
466	+	ConcurrentSkipListSubSetTest.suite(),
467	+	CopyOnWriteArrayListTest.suite(),
468	+	CopyOnWriteArraySetTest.suite(),
469	+	CountDownLatchTest.suite(),
470	+	CyclicBarrierTest.suite(),
471	+	DelayQueueTest.suite(),
472	+	EntryTest.suite(),
473	+	ExchangerTest.suite(),
474	+	ExecutorsTest.suite(),
475	+	ExecutorCompletionServiceTest.suite(),
476	+	FutureTaskTest.suite(),
477	+	LinkedBlockingDequeTest.suite(),
478	+	LinkedBlockingQueueTest.suite(),
479	+	LinkedListTest.suite(),
480	+	LockSupportTest.suite(),
481	+	PriorityBlockingQueueTest.suite(),
482	+	PriorityQueueTest.suite(),
483	+	ReentrantLockTest.suite(),
484	+	ReentrantReadWriteLockTest.suite(),
485	+	ScheduledExecutorTest.suite(),
486	+	ScheduledExecutorSubclassTest.suite(),
487	+	SemaphoreTest.suite(),
488	+	SynchronousQueueTest.suite(),
489	+	SystemTest.suite(),
490	+	ThreadLocalTest.suite(),
491	+	ThreadPoolExecutorTest.suite(),
492	+	ThreadPoolExecutorSubclassTest.suite(),
493	+	ThreadTest.suite(),
494	+	TimeUnitTest.suite(),
495	+	TreeMapTest.suite(),
496	+	TreeSetTest.suite(),
497	+	TreeSubMapTest.suite(),
498	+	TreeSubSetTest.suite());
499	+
500	+	// Java8+ test classes
501	+	if (atLeastJava8()) {
502	+	String[] java8TestClassNames = {
503	+	"Atomic8Test",
504	+	"CompletableFutureTest",
505	+	"ConcurrentHashMap8Test",
506	+	"CountedCompleterTest",
507	+	"DoubleAccumulatorTest",
508	+	"DoubleAdderTest",
509	+	"ForkJoinPool8Test",
510	+	"ForkJoinTask8Test",
511	+	"LongAccumulatorTest",
512	+	"LongAdderTest",
513	+	"SplittableRandomTest",
514	+	"StampedLockTest",
515	+	"SubmissionPublisherTest",
516	+	"ThreadLocalRandom8Test",
517	+	"TimeUnit8Test",
518	+	};
519	+	addNamedTestClasses(suite, java8TestClassNames);
520	+	}
521	+
522	+	// Java9+ test classes
523	+	if (atLeastJava9()) {
524	+	String[] java9TestClassNames = {
525	+	"AtomicBoolean9Test",
526	+	"AtomicInteger9Test",
527	+	"AtomicIntegerArray9Test",
528	+	"AtomicLong9Test",
529	+	"AtomicLongArray9Test",
530	+	"AtomicReference9Test",
531	+	"AtomicReferenceArray9Test",
532	+	"ExecutorCompletionService9Test",
533	+	};
534	+	addNamedTestClasses(suite, java9TestClassNames);
535	+	}
536	+
537	+	return suite;
538	+	}
539	+
540	+	/** Returns list of junit-style test method names in given class. */
541	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
542	+	Method[] methods = testClass.getDeclaredMethods();
543	+	ArrayList<String> names = new ArrayList<String>(methods.length);
544	+	for (Method method : methods) {
545	+	if (method.getName().startsWith("test")
546	+	&& Modifier.isPublic(method.getModifiers())
547	+	// method.getParameterCount() requires jdk8+
548	+	&& method.getParameterTypes().length == 0) {
549	+	names.add(method.getName());
550	+	}
551	+	}
552	+	return names;
553	+	}
554	+
555	+	/**
556	+	* Returns junit-style testSuite for the given test class, but
557	+	* parameterized by passing extra data to each test.
558	+	*/
559	+	public static <ExtraData> Test parameterizedTestSuite
560	+	(Class<? extends JSR166TestCase> testClass,
561	+	Class<ExtraData> dataClass,
562	+	ExtraData data) {
563	+	try {
564	+	TestSuite suite = new TestSuite();
565	+	Constructor c =
566	+	testClass.getDeclaredConstructor(dataClass, String.class);
567	+	for (String methodName : testMethodNames(testClass))
568	+	suite.addTest((Test) c.newInstance(data, methodName));
569	+	return suite;
570	+	} catch (Exception e) {
571	+	throw new Error(e);
572	+	}
573	+	}
574	+
575	+	/**
576	+	* Returns junit-style testSuite for the jdk8 extension of the
577	+	* given test class, but parameterized by passing extra data to
578	+	* each test.  Uses reflection to allow compilation in jdk7.
579	+	*/
580	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
581	+	(Class<? extends JSR166TestCase> testClass,
582	+	Class<ExtraData> dataClass,
583	+	ExtraData data) {
584	+	if (atLeastJava8()) {
585	+	String name = testClass.getName();
586	+	String name8 = name.replaceAll("Test$", "8Test");
587	+	if (name.equals(name8)) throw new Error(name);
588	+	try {
589	+	return (Test)
590	+	Class.forName(name8)
591	+	.getMethod("testSuite", new Class[] { dataClass })
592	+	.invoke(null, data);
593	+	} catch (Exception e) {
594	+	throw new Error(e);
595	+	}
596	+	} else {
597	+	return new TestSuite();
598	+	}
599	+	}
600	+
601	+	// Delays for timing-dependent tests, in milliseconds.
602	+
603	+	public static long SHORT_DELAY_MS;
604	+	public static long SMALL_DELAY_MS;
605	+	public static long MEDIUM_DELAY_MS;
606	+	public static long LONG_DELAY_MS;
607	+
608	+	/**
609	+	* Returns the shortest timed delay. This can be scaled up for
610	+	* slow machines using the jsr166.delay.factor system property,
611	+	* or via jtreg's -timeoutFactor: flag.
612	+	* http://openjdk.java.net/jtreg/command-help.html
613	+	*/
614	+	protected long getShortDelay() {
615	+	return (long) (50 * delayFactor);
616	+	}
617	+
618	+	/**
619	+	* Sets delays as multiples of SHORT_DELAY.
620	+	*/
621	+	protected void setDelays() {
622	+	SHORT_DELAY_MS = getShortDelay();
623	+	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
624	+	MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
625	+	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
626	+	}
627	+
628	+	/**
629	+	* Returns a timeout in milliseconds to be used in tests that
630	+	* verify that operations block or time out.
631	+	*/
632	+	long timeoutMillis() {
633	+	return SHORT_DELAY_MS / 4;
634	+	}
635	+
636	+	/**
637	+	* Returns a new Date instance representing a time at least
638	+	* delayMillis milliseconds in the future.
639	+	*/
640	+	Date delayedDate(long delayMillis) {
641	+	// Add 1 because currentTimeMillis is known to round into the past.
642	+	return new Date(System.currentTimeMillis() + delayMillis + 1);
643	+	}
644
645		/**
646	<	* Flag set true if any threadAssert methods fail
646	>	* The first exception encountered if any threadAssertXXX method fails.
647		*/
648	<	protected volatile boolean threadFailed;
648	>	private final AtomicReference<Throwable> threadFailure
649	>	= new AtomicReference<Throwable>(null);
650
651		/**
652	<	* Initialize test to indicat that no thread assertions have failed
652	>	* Records an exception so that it can be rethrown later in the test
653	>	* harness thread, triggering a test case failure.  Only the first
654	>	* failure is recorded; subsequent calls to this method from within
655	>	* the same test have no effect.
656		*/
657	<	public void setUp() {
658	<	threadFailed = false;
657	>	public void threadRecordFailure(Throwable t) {
658	>	System.err.println(t);
659	>	dumpTestThreads();
660	>	threadFailure.compareAndSet(null, t);
661	>	}
662	>
663	>	public void setUp() {
664	>	setDelays();
665	>	}
666	>
667	>	void tearDownFail(String format, Object... args) {
668	>	String msg = toString() + ": " + String.format(format, args);
669	>	System.err.println(msg);
670	>	dumpTestThreads();
671	>	throw new AssertionFailedError(msg);
672		}
673
674		/**
675	<	* Trigger test case failure if any thread assertions have failed
675	>	* Extra checks that get done for all test cases.
676	>	*
677	>	* Triggers test case failure if any thread assertions have failed,
678	>	* by rethrowing, in the test harness thread, any exception recorded
679	>	* earlier by threadRecordFailure.
680	>	*
681	>	* Triggers test case failure if interrupt status is set in the main thread.
682		*/
683	<	public void tearDown() {
684	<	assertFalse(threadFailed);
683	>	public void tearDown() throws Exception {
684	>	Throwable t = threadFailure.getAndSet(null);
685	>	if (t != null) {
686	>	if (t instanceof Error)
687	>	throw (Error) t;
688	>	else if (t instanceof RuntimeException)
689	>	throw (RuntimeException) t;
690	>	else if (t instanceof Exception)
691	>	throw (Exception) t;
692	>	else {
693	>	AssertionFailedError afe =
694	>	new AssertionFailedError(t.toString());
695	>	afe.initCause(t);
696	>	throw afe;
697	>	}
698	>	}
699	>
700	>	if (Thread.interrupted())
701	>	tearDownFail("interrupt status set in main thread");
702	>
703	>	checkForkJoinPoolThreadLeaks();
704		}
705
706	+	/**
707	+	* Finds missing PoolCleaners
708	+	*/
709	+	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
710	+	Thread[] survivors = new Thread[7];
711	+	int count = Thread.enumerate(survivors);
712	+	for (int i = 0; i < count; i++) {
713	+	Thread thread = survivors[i];
714	+	String name = thread.getName();
715	+	if (name.startsWith("ForkJoinPool-")) {
716	+	// give thread some time to terminate
717	+	thread.join(LONG_DELAY_MS);
718	+	if (thread.isAlive())
719	+	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
720	+	thread);
721	+	}
722	+	}
723	+
724	+	if (!ForkJoinPool.commonPool()
725	+	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
726	+	tearDownFail("ForkJoin common pool thread stuck");
727	+	}
728	+
729	+	/**
730	+	* Just like fail(reason), but additionally recording (using
731	+	* threadRecordFailure) any AssertionFailedError thrown, so that
732	+	* the current testcase will fail.
733	+	*/
734		public void threadFail(String reason) {
735	<	threadFailed = true;
736	<	fail(reason);
735	>	try {
736	>	fail(reason);
737	>	} catch (AssertionFailedError t) {
738	>	threadRecordFailure(t);
739	>	throw t;
740	>	}
741		}
742
743	+	/**
744	+	* Just like assertTrue(b), but additionally recording (using
745	+	* threadRecordFailure) any AssertionFailedError thrown, so that
746	+	* the current testcase will fail.
747	+	*/
748		public void threadAssertTrue(boolean b) {
749	<	if (!b) {
83	<	threadFailed = true;
749	>	try {
750		assertTrue(b);
751	+	} catch (AssertionFailedError t) {
752	+	threadRecordFailure(t);
753	+	throw t;
754		}
755		}
756	+
757	+	/**
758	+	* Just like assertFalse(b), but additionally recording (using
759	+	* threadRecordFailure) any AssertionFailedError thrown, so that
760	+	* the current testcase will fail.
761	+	*/
762		public void threadAssertFalse(boolean b) {
763	<	if (b) {
89	<	threadFailed = true;
763	>	try {
764		assertFalse(b);
765	+	} catch (AssertionFailedError t) {
766	+	threadRecordFailure(t);
767	+	throw t;
768		}
769		}
770	+
771	+	/**
772	+	* Just like assertNull(x), but additionally recording (using
773	+	* threadRecordFailure) any AssertionFailedError thrown, so that
774	+	* the current testcase will fail.
775	+	*/
776		public void threadAssertNull(Object x) {
777	<	if (x != null) {
95	<	threadFailed = true;
777	>	try {
778		assertNull(x);
779	+	} catch (AssertionFailedError t) {
780	+	threadRecordFailure(t);
781	+	throw t;
782		}
783		}
784	+
785	+	/**
786	+	* Just like assertEquals(x, y), but additionally recording (using
787	+	* threadRecordFailure) any AssertionFailedError thrown, so that
788	+	* the current testcase will fail.
789	+	*/
790		public void threadAssertEquals(long x, long y) {
791	<	if (x != y) {
101	<	threadFailed = true;
791	>	try {
792		assertEquals(x, y);
793	+	} catch (AssertionFailedError t) {
794	+	threadRecordFailure(t);
795	+	throw t;
796		}
797		}
798	+
799	+	/**
800	+	* Just like assertEquals(x, y), but additionally recording (using
801	+	* threadRecordFailure) any AssertionFailedError thrown, so that
802	+	* the current testcase will fail.
803	+	*/
804		public void threadAssertEquals(Object x, Object y) {
805	<	if (x != y && (x == null || !x.equals(y))) {
107	<	threadFailed = true;
805	>	try {
806		assertEquals(x, y);
807	+	} catch (AssertionFailedError fail) {
808	+	threadRecordFailure(fail);
809	+	throw fail;
810	+	} catch (Throwable fail) {
811	+	threadUnexpectedException(fail);
812		}
813		}
814
815		/**
816	<	* Wait out termination of a thread pool or fail doing so
816	>	* Just like assertSame(x, y), but additionally recording (using
817	>	* threadRecordFailure) any AssertionFailedError thrown, so that
818	>	* the current testcase will fail.
819		*/
820	<	public void joinPool(ExecutorService exec) {
820	>	public void threadAssertSame(Object x, Object y) {
821		try {
822	<	exec.shutdown();
823	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
824	<	} catch(InterruptedException ie) {
825	<	fail("unexpected exception");
822	>	assertSame(x, y);
823	>	} catch (AssertionFailedError fail) {
824	>	threadRecordFailure(fail);
825	>	throw fail;
826	>	}
827	>	}
828	>
829	>	/**
830	>	* Calls threadFail with message "should throw exception".
831	>	*/
832	>	public void threadShouldThrow() {
833	>	threadFail("should throw exception");
834	>	}
835	>
836	>	/**
837	>	* Calls threadFail with message "should throw" + exceptionName.
838	>	*/
839	>	public void threadShouldThrow(String exceptionName) {
840	>	threadFail("should throw " + exceptionName);
841	>	}
842	>
843	>	/**
844	>	* Records the given exception using {@link #threadRecordFailure},
845	>	* then rethrows the exception, wrapping it in an
846	>	* AssertionFailedError if necessary.
847	>	*/
848	>	public void threadUnexpectedException(Throwable t) {
849	>	threadRecordFailure(t);
850	>	t.printStackTrace();
851	>	if (t instanceof RuntimeException)
852	>	throw (RuntimeException) t;
853	>	else if (t instanceof Error)
854	>	throw (Error) t;
855	>	else {
856	>	AssertionFailedError afe =
857	>	new AssertionFailedError("unexpected exception: " + t);
858	>	afe.initCause(t);
859	>	throw afe;
860		}
861		}
862
863	<	public static final long SHORT_DELAY_MS =   100;
864	<	public static final long SMALL_DELAY_MS =   500;
865	<	public static final long MEDIUM_DELAY_MS = 1000;
866	<	public static final long LONG_DELAY_MS =   5000;
863	>	/**
864	>	* Delays, via Thread.sleep, for the given millisecond delay, but
865	>	* if the sleep is shorter than specified, may re-sleep or yield
866	>	* until time elapses.  Ensures that the given time, as measured
867	>	* by System.nanoTime(), has elapsed.
868	>	*/
869	>	static void delay(long millis) throws InterruptedException {
870	>	long nanos = millis * (1000 * 1000);
871	>	final long wakeupTime = System.nanoTime() + nanos;
872	>	do {
873	>	if (millis > 0L)
874	>	Thread.sleep(millis);
875	>	else // too short to sleep
876	>	Thread.yield();
877	>	nanos = wakeupTime - System.nanoTime();
878	>	millis = nanos / (1000 * 1000);
879	>	} while (nanos >= 0L);
880	>	}
881
882	+	/**
883	+	* Allows use of try-with-resources with per-test thread pools.
884	+	*/
885	+	class PoolCleaner implements AutoCloseable {
886	+	private final ExecutorService pool;
887	+	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
888	+	public void close() { joinPool(pool); }
889	+	}
890	+
891	+	/**
892	+	* An extension of PoolCleaner that has an action to release the pool.
893	+	*/
894	+	class PoolCleanerWithReleaser extends PoolCleaner {
895	+	private final Runnable releaser;
896	+	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
897	+	super(pool);
898	+	this.releaser = releaser;
899	+	}
900	+	public void close() {
901	+	try {
902	+	releaser.run();
903	+	} finally {
904	+	super.close();
905	+	}
906	+	}
907	+	}
908	+
909	+	PoolCleaner cleaner(ExecutorService pool) {
910	+	return new PoolCleaner(pool);
911	+	}
912	+
913	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
914	+	return new PoolCleanerWithReleaser(pool, releaser);
915	+	}
916	+
917	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
918	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
919	+	}
920	+
921	+	Runnable releaser(final CountDownLatch latch) {
922	+	return new Runnable() { public void run() {
923	+	do { latch.countDown(); }
924	+	while (latch.getCount() > 0);
925	+	}};
926	+	}
927	+
928	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
929	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
930	+	}
931	+
932	+	Runnable releaser(final AtomicBoolean flag) {
933	+	return new Runnable() { public void run() { flag.set(true); }};
934	+	}
935	+
936	+	/**
937	+	* Waits out termination of a thread pool or fails doing so.
938	+	*/
939	+	void joinPool(ExecutorService pool) {
940	+	try {
941	+	pool.shutdown();
942	+	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
943	+	try {
944	+	threadFail("ExecutorService " + pool +
945	+	" did not terminate in a timely manner");
946	+	} finally {
947	+	// last resort, for the benefit of subsequent tests
948	+	pool.shutdownNow();
949	+	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
950	+	}
951	+	}
952	+	} catch (SecurityException ok) {
953	+	// Allowed in case test doesn't have privs
954	+	} catch (InterruptedException fail) {
955	+	threadFail("Unexpected InterruptedException");
956	+	}
957	+	}
958	+
959	+	/**
960	+	* Like Runnable, but with the freedom to throw anything.
961	+	* junit folks had the same idea:
962	+	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
963	+	*/
964	+	interface Action { public void run() throws Throwable; }
965	+
966	+	/**
967	+	* Runs all the given actions in parallel, failing if any fail.
968	+	* Useful for running multiple variants of tests that are
969	+	* necessarily individually slow because they must block.
970	+	*/
971	+	void testInParallel(Action ... actions) {
972	+	ExecutorService pool = Executors.newCachedThreadPool();
973	+	try (PoolCleaner cleaner = cleaner(pool)) {
974	+	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
975	+	for (final Action action : actions)
976	+	futures.add(pool.submit(new CheckedRunnable() {
977	+	public void realRun() throws Throwable { action.run();}}));
978	+	for (Future<?> future : futures)
979	+	try {
980	+	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
981	+	} catch (ExecutionException ex) {
982	+	threadUnexpectedException(ex.getCause());
983	+	} catch (Exception ex) {
984	+	threadUnexpectedException(ex);
985	+	}
986	+	}
987	+	}
988	+
989	+	/**
990	+	* A debugging tool to print stack traces of most threads, as jstack does.
991	+	* Uninteresting threads are filtered out.
992	+	*/
993	+	static void dumpTestThreads() {
994	+	SecurityManager sm = System.getSecurityManager();
995	+	if (sm != null) {
996	+	try {
997	+	System.setSecurityManager(null);
998	+	} catch (SecurityException giveUp) {
999	+	return;
1000	+	}
1001	+	}
1002	+
1003	+	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1004	+	System.err.println("------ stacktrace dump start ------");
1005	+	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1006	+	String name = info.getThreadName();
1007	+	if ("Signal Dispatcher".equals(name))
1008	+	continue;
1009	+	if ("Reference Handler".equals(name)
1010	+	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
1011	+	continue;
1012	+	if ("Finalizer".equals(name)
1013	+	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
1014	+	continue;
1015	+	if ("checkForWedgedTest".equals(name))
1016	+	continue;
1017	+	System.err.print(info);
1018	+	}
1019	+	System.err.println("------ stacktrace dump end ------");
1020	+
1021	+	if (sm != null) System.setSecurityManager(sm);
1022	+	}
1023	+
1024	+	/**
1025	+	* Checks that thread does not terminate within the default
1026	+	* millisecond delay of {@code timeoutMillis()}.
1027	+	*/
1028	+	void assertThreadStaysAlive(Thread thread) {
1029	+	assertThreadStaysAlive(thread, timeoutMillis());
1030	+	}
1031	+
1032	+	/**
1033	+	* Checks that thread does not terminate within the given millisecond delay.
1034	+	*/
1035	+	void assertThreadStaysAlive(Thread thread, long millis) {
1036	+	try {
1037	+	// No need to optimize the failing case via Thread.join.
1038	+	delay(millis);
1039	+	assertTrue(thread.isAlive());
1040	+	} catch (InterruptedException fail) {
1041	+	threadFail("Unexpected InterruptedException");
1042	+	}
1043	+	}
1044	+
1045	+	/**
1046	+	* Checks that the threads do not terminate within the default
1047	+	* millisecond delay of {@code timeoutMillis()}.
1048	+	*/
1049	+	void assertThreadsStayAlive(Thread... threads) {
1050	+	assertThreadsStayAlive(timeoutMillis(), threads);
1051	+	}
1052	+
1053	+	/**
1054	+	* Checks that the threads do not terminate within the given millisecond delay.
1055	+	*/
1056	+	void assertThreadsStayAlive(long millis, Thread... threads) {
1057	+	try {
1058	+	// No need to optimize the failing case via Thread.join.
1059	+	delay(millis);
1060	+	for (Thread thread : threads)
1061	+	assertTrue(thread.isAlive());
1062	+	} catch (InterruptedException fail) {
1063	+	threadFail("Unexpected InterruptedException");
1064	+	}
1065	+	}
1066	+
1067	+	/**
1068	+	* Checks that future.get times out, with the default timeout of
1069	+	* {@code timeoutMillis()}.
1070	+	*/
1071	+	void assertFutureTimesOut(Future future) {
1072	+	assertFutureTimesOut(future, timeoutMillis());
1073	+	}
1074	+
1075	+	/**
1076	+	* Checks that future.get times out, with the given millisecond timeout.
1077	+	*/
1078	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
1079	+	long startTime = System.nanoTime();
1080	+	try {
1081	+	future.get(timeoutMillis, MILLISECONDS);
1082	+	shouldThrow();
1083	+	} catch (TimeoutException success) {
1084	+	} catch (Exception fail) {
1085	+	threadUnexpectedException(fail);
1086	+	} finally { future.cancel(true); }
1087	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1088	+	}
1089	+
1090	+	/**
1091	+	* Fails with message "should throw exception".
1092	+	*/
1093	+	public void shouldThrow() {
1094	+	fail("Should throw exception");
1095	+	}
1096	+
1097	+	/**
1098	+	* Fails with message "should throw " + exceptionName.
1099	+	*/
1100	+	public void shouldThrow(String exceptionName) {
1101	+	fail("Should throw " + exceptionName);
1102	+	}
1103
1104		/**
1105		* The number of elements to place in collections, arrays, etc.
#	Line 134 | Line 1108 | public class JSR166TestCase extends Test
1108
1109		// Some convenient Integer constants
1110
1111	<	public static final Integer zero = new Integer(0);
1112	<	public static final Integer one = new Integer(1);
1113	<	public static final Integer two = new Integer(2);
1114	<	public static final Integer three  = new Integer(3);
1111	>	public static final Integer zero  = new Integer(0);
1112	>	public static final Integer one   = new Integer(1);
1113	>	public static final Integer two   = new Integer(2);
1114	>	public static final Integer three = new Integer(3);
1115		public static final Integer four  = new Integer(4);
1116		public static final Integer five  = new Integer(5);
1117	<	public static final Integer six = new Integer(6);
1117	>	public static final Integer six   = new Integer(6);
1118		public static final Integer seven = new Integer(7);
1119		public static final Integer eight = new Integer(8);
1120	<	public static final Integer nine = new Integer(9);
1120	>	public static final Integer nine  = new Integer(9);
1121		public static final Integer m1  = new Integer(-1);
1122		public static final Integer m2  = new Integer(-2);
1123		public static final Integer m3  = new Integer(-3);
1124	<	public static final Integer m4 = new Integer(-4);
1125	<	public static final Integer m5 = new Integer(-5);
1124	>	public static final Integer m4  = new Integer(-4);
1125	>	public static final Integer m5  = new Integer(-5);
1126	>	public static final Integer m6  = new Integer(-6);
1127		public static final Integer m10 = new Integer(-10);
1128
1129	+	/**
1130	+	* Runs Runnable r with a security policy that permits precisely
1131	+	* the specified permissions.  If there is no current security
1132	+	* manager, the runnable is run twice, both with and without a
1133	+	* security manager.  We require that any security manager permit
1134	+	* getPolicy/setPolicy.
1135	+	*/
1136	+	public void runWithPermissions(Runnable r, Permission... permissions) {
1137	+	SecurityManager sm = System.getSecurityManager();
1138	+	if (sm == null) {
1139	+	r.run();
1140	+	}
1141	+	runWithSecurityManagerWithPermissions(r, permissions);
1142	+	}
1143
1144	<	// Some convenient Runnable classes
1144	>	/**
1145	>	* Runs Runnable r with a security policy that permits precisely
1146	>	* the specified permissions.  If there is no current security
1147	>	* manager, a temporary one is set for the duration of the
1148	>	* Runnable.  We require that any security manager permit
1149	>	* getPolicy/setPolicy.
1150	>	*/
1151	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1152	>	Permission... permissions) {
1153	>	SecurityManager sm = System.getSecurityManager();
1154	>	if (sm == null) {
1155	>	Policy savedPolicy = Policy.getPolicy();
1156	>	try {
1157	>	Policy.setPolicy(permissivePolicy());
1158	>	System.setSecurityManager(new SecurityManager());
1159	>	runWithSecurityManagerWithPermissions(r, permissions);
1160	>	} finally {
1161	>	System.setSecurityManager(null);
1162	>	Policy.setPolicy(savedPolicy);
1163	>	}
1164	>	} else {
1165	>	Policy savedPolicy = Policy.getPolicy();
1166	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1167	>	Policy.setPolicy(policy);
1168
1169	<	public static class NoOpRunnable implements Runnable {
1170	<	public void run() {}
1169	>	try {
1170	>	r.run();
1171	>	} finally {
1172	>	policy.addPermission(new SecurityPermission("setPolicy"));
1173	>	Policy.setPolicy(savedPolicy);
1174	>	}
1175	>	}
1176		}
1177
1178	<	public static class NoOpCallable implements Callable {
1179	<	public Object call() { return Boolean.TRUE; }
1178	>	/**
1179	>	* Runs a runnable without any permissions.
1180	>	*/
1181	>	public void runWithoutPermissions(Runnable r) {
1182	>	runWithPermissions(r);
1183		}
1184
1185	<	public class ShortRunnable implements Runnable {
1186	<	public void run() {
1187	<	try {
1188	<	Thread.sleep(SHORT_DELAY_MS);
1185	>	/**
1186	>	* A security policy where new permissions can be dynamically added
1187	>	* or all cleared.
1188	>	*/
1189	>	public static class AdjustablePolicy extends java.security.Policy {
1190	>	Permissions perms = new Permissions();
1191	>	AdjustablePolicy(Permission... permissions) {
1192	>	for (Permission permission : permissions)
1193	>	perms.add(permission);
1194	>	}
1195	>	void addPermission(Permission perm) { perms.add(perm); }
1196	>	void clearPermissions() { perms = new Permissions(); }
1197	>	public PermissionCollection getPermissions(CodeSource cs) {
1198	>	return perms;
1199	>	}
1200	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1201	>	return perms;
1202	>	}
1203	>	public boolean implies(ProtectionDomain pd, Permission p) {
1204	>	return perms.implies(p);
1205	>	}
1206	>	public void refresh() {}
1207	>	public String toString() {
1208	>	List<Permission> ps = new ArrayList<Permission>();
1209	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1210	>	ps.add(e.nextElement());
1211	>	return "AdjustablePolicy with permissions " + ps;
1212	>	}
1213	>	}
1214	>
1215	>	/**
1216	>	* Returns a policy containing all the permissions we ever need.
1217	>	*/
1218	>	public static Policy permissivePolicy() {
1219	>	return new AdjustablePolicy
1220	>	// Permissions j.u.c. needs directly
1221	>	(new RuntimePermission("modifyThread"),
1222	>	new RuntimePermission("getClassLoader"),
1223	>	new RuntimePermission("setContextClassLoader"),
1224	>	// Permissions needed to change permissions!
1225	>	new SecurityPermission("getPolicy"),
1226	>	new SecurityPermission("setPolicy"),
1227	>	new RuntimePermission("setSecurityManager"),
1228	>	// Permissions needed by the junit test harness
1229	>	new RuntimePermission("accessDeclaredMembers"),
1230	>	new PropertyPermission("*", "read"),
1231	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1232	>	}
1233	>
1234	>	/**
1235	>	* Sleeps until the given time has elapsed.
1236	>	* Throws AssertionFailedError if interrupted.
1237	>	*/
1238	>	void sleep(long millis) {
1239	>	try {
1240	>	delay(millis);
1241	>	} catch (InterruptedException fail) {
1242	>	AssertionFailedError afe =
1243	>	new AssertionFailedError("Unexpected InterruptedException");
1244	>	afe.initCause(fail);
1245	>	throw afe;
1246	>	}
1247	>	}
1248	>
1249	>	/**
1250	>	* Spin-waits up to the specified number of milliseconds for the given
1251	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1252	>	*/
1253	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1254	>	long startTime = System.nanoTime();
1255	>	for (;;) {
1256	>	Thread.State s = thread.getState();
1257	>	if (s == Thread.State.BLOCKED ||
1258	>	s == Thread.State.WAITING ||
1259	>	s == Thread.State.TIMED_WAITING)
1260	>	return;
1261	>	else if (s == Thread.State.TERMINATED)
1262	>	fail("Unexpected thread termination");
1263	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1264	>	threadAssertTrue(thread.isAlive());
1265	>	return;
1266		}
1267	<	catch(Exception e) {
1268	<	threadFail("unexpectedException");
1267	>	Thread.yield();
1268	>	}
1269	>	}
1270	>
1271	>	/**
1272	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1273	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1274	>	*/
1275	>	void waitForThreadToEnterWaitState(Thread thread) {
1276	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1277	>	}
1278	>
1279	>	/**
1280	>	* Returns the number of milliseconds since time given by
1281	>	* startNanoTime, which must have been previously returned from a
1282	>	* call to {@link System#nanoTime()}.
1283	>	*/
1284	>	static long millisElapsedSince(long startNanoTime) {
1285	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1286	>	}
1287	>
1288	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1289	>	//         long startTime = System.nanoTime();
1290	>	//         try {
1291	>	//             r.run();
1292	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1293	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1294	>	//             throw new AssertionFailedError("did not return promptly");
1295	>	//     }
1296	>
1297	>	//     void assertTerminatesPromptly(Runnable r) {
1298	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1299	>	//     }
1300	>
1301	>	/**
1302	>	* Checks that timed f.get() returns the expected value, and does not
1303	>	* wait for the timeout to elapse before returning.
1304	>	*/
1305	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1306	>	long startTime = System.nanoTime();
1307	>	try {
1308	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1309	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1310	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1311	>	throw new AssertionFailedError("timed get did not return promptly");
1312	>	}
1313	>
1314	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1315	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1316	>	}
1317	>
1318	>	/**
1319	>	* Returns a new started daemon Thread running the given runnable.
1320	>	*/
1321	>	Thread newStartedThread(Runnable runnable) {
1322	>	Thread t = new Thread(runnable);
1323	>	t.setDaemon(true);
1324	>	t.start();
1325	>	return t;
1326	>	}
1327	>
1328	>	/**
1329	>	* Waits for the specified time (in milliseconds) for the thread
1330	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1331	>	* the thread (in the hope that it may terminate later) and fails.
1332	>	*/
1333	>	void awaitTermination(Thread t, long timeoutMillis) {
1334	>	try {
1335	>	t.join(timeoutMillis);
1336	>	} catch (InterruptedException fail) {
1337	>	threadUnexpectedException(fail);
1338	>	} finally {
1339	>	if (t.getState() != Thread.State.TERMINATED) {
1340	>	t.interrupt();
1341	>	threadFail("timed out waiting for thread to terminate");
1342		}
1343		}
1344		}
1345
1346	<	public class ShortInterruptedRunnable implements Runnable {
1347	<	public void run() {
1346	>	/**
1347	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1348	>	* terminate (using {@link Thread#join(long)}), else interrupts
1349	>	* the thread (in the hope that it may terminate later) and fails.
1350	>	*/
1351	>	void awaitTermination(Thread t) {
1352	>	awaitTermination(t, LONG_DELAY_MS);
1353	>	}
1354	>
1355	>	// Some convenient Runnable classes
1356	>
1357	>	public abstract class CheckedRunnable implements Runnable {
1358	>	protected abstract void realRun() throws Throwable;
1359	>
1360	>	public final void run() {
1361		try {
1362	<	Thread.sleep(SHORT_DELAY_MS);
1363	<	threadFail("should throw IE");
1362	>	realRun();
1363	>	} catch (Throwable fail) {
1364	>	threadUnexpectedException(fail);
1365		}
1366	<	catch(InterruptedException success) {
1366	>	}
1367	>	}
1368	>
1369	>	public abstract class RunnableShouldThrow implements Runnable {
1370	>	protected abstract void realRun() throws Throwable;
1371	>
1372	>	final Class<?> exceptionClass;
1373	>
1374	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1375	>	this.exceptionClass = exceptionClass;
1376	>	}
1377	>
1378	>	public final void run() {
1379	>	try {
1380	>	realRun();
1381	>	threadShouldThrow(exceptionClass.getSimpleName());
1382	>	} catch (Throwable t) {
1383	>	if (! exceptionClass.isInstance(t))
1384	>	threadUnexpectedException(t);
1385		}
1386		}
1387		}
1388
1389	<	public class SmallRunnable implements Runnable {
1390	<	public void run() {
1389	>	public abstract class ThreadShouldThrow extends Thread {
1390	>	protected abstract void realRun() throws Throwable;
1391	>
1392	>	final Class<?> exceptionClass;
1393	>
1394	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1395	>	this.exceptionClass = exceptionClass;
1396	>	}
1397	>
1398	>	public final void run() {
1399		try {
1400	<	Thread.sleep(SMALL_DELAY_MS);
1400	>	realRun();
1401	>	threadShouldThrow(exceptionClass.getSimpleName());
1402	>	} catch (Throwable t) {
1403	>	if (! exceptionClass.isInstance(t))
1404	>	threadUnexpectedException(t);
1405		}
1406	<	catch(Exception e) {
1407	<	threadFail("unexpectedException");
1406	>	}
1407	>	}
1408	>
1409	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1410	>	protected abstract void realRun() throws Throwable;
1411	>
1412	>	public final void run() {
1413	>	try {
1414	>	realRun();
1415	>	threadShouldThrow("InterruptedException");
1416	>	} catch (InterruptedException success) {
1417	>	threadAssertFalse(Thread.interrupted());
1418	>	} catch (Throwable fail) {
1419	>	threadUnexpectedException(fail);
1420		}
1421		}
1422		}
1423
1424	<	public class SmallCallable implements Callable {
1425	<	public Object call() {
1424	>	public abstract class CheckedCallable<T> implements Callable<T> {
1425	>	protected abstract T realCall() throws Throwable;
1426	>
1427	>	public final T call() {
1428		try {
1429	<	Thread.sleep(SMALL_DELAY_MS);
1429	>	return realCall();
1430	>	} catch (Throwable fail) {
1431	>	threadUnexpectedException(fail);
1432	>	return null;
1433		}
1434	<	catch(Exception e) {
1435	<	threadFail("unexpectedException");
1434	>	}
1435	>	}
1436	>
1437	>	public abstract class CheckedInterruptedCallable<T>
1438	>	implements Callable<T> {
1439	>	protected abstract T realCall() throws Throwable;
1440	>
1441	>	public final T call() {
1442	>	try {
1443	>	T result = realCall();
1444	>	threadShouldThrow("InterruptedException");
1445	>	return result;
1446	>	} catch (InterruptedException success) {
1447	>	threadAssertFalse(Thread.interrupted());
1448	>	} catch (Throwable fail) {
1449	>	threadUnexpectedException(fail);
1450		}
1451	+	return null;
1452	+	}
1453	+	}
1454	+
1455	+	public static class NoOpRunnable implements Runnable {
1456	+	public void run() {}
1457	+	}
1458	+
1459	+	public static class NoOpCallable implements Callable {
1460	+	public Object call() { return Boolean.TRUE; }
1461	+	}
1462	+
1463	+	public static final String TEST_STRING = "a test string";
1464	+
1465	+	public static class StringTask implements Callable<String> {
1466	+	final String value;
1467	+	public StringTask() { this(TEST_STRING); }
1468	+	public StringTask(String value) { this.value = value; }
1469	+	public String call() { return value; }
1470	+	}
1471	+
1472	+	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1473	+	return new CheckedCallable<String>() {
1474	+	protected String realCall() {
1475	+	try {
1476	+	latch.await();
1477	+	} catch (InterruptedException quittingTime) {}
1478	+	return TEST_STRING;
1479	+	}};
1480	+	}
1481	+
1482	+	public Runnable countDowner(final CountDownLatch latch) {
1483	+	return new CheckedRunnable() {
1484	+	public void realRun() throws InterruptedException {
1485	+	latch.countDown();
1486	+	}};
1487	+	}
1488	+
1489	+	class LatchAwaiter extends CheckedRunnable {
1490	+	static final int NEW = 0;
1491	+	static final int RUNNING = 1;
1492	+	static final int DONE = 2;
1493	+	final CountDownLatch latch;
1494	+	int state = NEW;
1495	+	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1496	+	public void realRun() throws InterruptedException {
1497	+	state = 1;
1498	+	await(latch);
1499	+	state = 2;
1500	+	}
1501	+	}
1502	+
1503	+	public LatchAwaiter awaiter(CountDownLatch latch) {
1504	+	return new LatchAwaiter(latch);
1505	+	}
1506	+
1507	+	public void await(CountDownLatch latch, long timeoutMillis) {
1508	+	try {
1509	+	if (!latch.await(timeoutMillis, MILLISECONDS))
1510	+	fail("timed out waiting for CountDownLatch for "
1511	+	+ (timeoutMillis/1000) + " sec");
1512	+	} catch (Throwable fail) {
1513	+	threadUnexpectedException(fail);
1514	+	}
1515	+	}
1516	+
1517	+	public void await(CountDownLatch latch) {
1518	+	await(latch, LONG_DELAY_MS);
1519	+	}
1520	+
1521	+	public void await(Semaphore semaphore) {
1522	+	try {
1523	+	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1524	+	fail("timed out waiting for Semaphore for "
1525	+	+ (LONG_DELAY_MS/1000) + " sec");
1526	+	} catch (Throwable fail) {
1527	+	threadUnexpectedException(fail);
1528	+	}
1529	+	}
1530	+
1531	+	//     /**
1532	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1533	+	//      */
1534	+	//     public void await(AtomicBoolean flag) {
1535	+	//         await(flag, LONG_DELAY_MS);
1536	+	//     }
1537	+
1538	+	//     /**
1539	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1540	+	//      */
1541	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1542	+	//         long startTime = System.nanoTime();
1543	+	//         while (!flag.get()) {
1544	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1545	+	//                 throw new AssertionFailedError("timed out");
1546	+	//             Thread.yield();
1547	+	//         }
1548	+	//     }
1549	+
1550	+	public static class NPETask implements Callable<String> {
1551	+	public String call() { throw new NullPointerException(); }
1552	+	}
1553	+
1554	+	public static class CallableOne implements Callable<Integer> {
1555	+	public Integer call() { return one; }
1556	+	}
1557	+
1558	+	public class ShortRunnable extends CheckedRunnable {
1559	+	protected void realRun() throws Throwable {
1560	+	delay(SHORT_DELAY_MS);
1561	+	}
1562	+	}
1563	+
1564	+	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1565	+	protected void realRun() throws InterruptedException {
1566	+	delay(SHORT_DELAY_MS);
1567	+	}
1568	+	}
1569	+
1570	+	public class SmallRunnable extends CheckedRunnable {
1571	+	protected void realRun() throws Throwable {
1572	+	delay(SMALL_DELAY_MS);
1573	+	}
1574	+	}
1575	+
1576	+	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1577	+	protected void realRun() {
1578	+	try {
1579	+	delay(SMALL_DELAY_MS);
1580	+	} catch (InterruptedException ok) {}
1581	+	}
1582	+	}
1583	+
1584	+	public class SmallCallable extends CheckedCallable {
1585	+	protected Object realCall() throws InterruptedException {
1586	+	delay(SMALL_DELAY_MS);
1587		return Boolean.TRUE;
1588		}
1589		}
1590
1591	<	public class SmallInterruptedRunnable implements Runnable {
1591	>	public class MediumRunnable extends CheckedRunnable {
1592	>	protected void realRun() throws Throwable {
1593	>	delay(MEDIUM_DELAY_MS);
1594	>	}
1595	>	}
1596	>
1597	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1598	>	protected void realRun() throws InterruptedException {
1599	>	delay(MEDIUM_DELAY_MS);
1600	>	}
1601	>	}
1602	>
1603	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1604	>	return new CheckedRunnable() {
1605	>	protected void realRun() {
1606	>	try {
1607	>	delay(timeoutMillis);
1608	>	} catch (InterruptedException ok) {}
1609	>	}};
1610	>	}
1611	>
1612	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1613	>	protected void realRun() {
1614	>	try {
1615	>	delay(MEDIUM_DELAY_MS);
1616	>	} catch (InterruptedException ok) {}
1617	>	}
1618	>	}
1619	>
1620	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1621	>	protected void realRun() {
1622	>	try {
1623	>	delay(LONG_DELAY_MS);
1624	>	} catch (InterruptedException ok) {}
1625	>	}
1626	>	}
1627	>
1628	>	/**
1629	>	* For use as ThreadFactory in constructors
1630	>	*/
1631	>	public static class SimpleThreadFactory implements ThreadFactory {
1632	>	public Thread newThread(Runnable r) {
1633	>	return new Thread(r);
1634	>	}
1635	>	}
1636	>
1637	>	public interface TrackedRunnable extends Runnable {
1638	>	boolean isDone();
1639	>	}
1640	>
1641	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1642	>	return new TrackedRunnable() {
1643	>	private volatile boolean done = false;
1644	>	public boolean isDone() { return done; }
1645	>	public void run() {
1646	>	try {
1647	>	delay(timeoutMillis);
1648	>	done = true;
1649	>	} catch (InterruptedException ok) {}
1650	>	}
1651	>	};
1652	>	}
1653	>
1654	>	public static class TrackedShortRunnable implements Runnable {
1655	>	public volatile boolean done = false;
1656		public void run() {
1657		try {
1658	<	Thread.sleep(SMALL_DELAY_MS);
1659	<	threadFail("should throw IE");
1660	<	}
1661	<	catch(InterruptedException success) {
1662	<	}
1658	>	delay(SHORT_DELAY_MS);
1659	>	done = true;
1660	>	} catch (InterruptedException ok) {}
1661	>	}
1662	>	}
1663	>
1664	>	public static class TrackedSmallRunnable implements Runnable {
1665	>	public volatile boolean done = false;
1666	>	public void run() {
1667	>	try {
1668	>	delay(SMALL_DELAY_MS);
1669	>	done = true;
1670	>	} catch (InterruptedException ok) {}
1671		}
1672		}
1673
1674	+	public static class TrackedMediumRunnable implements Runnable {
1675	+	public volatile boolean done = false;
1676	+	public void run() {
1677	+	try {
1678	+	delay(MEDIUM_DELAY_MS);
1679	+	done = true;
1680	+	} catch (InterruptedException ok) {}
1681	+	}
1682	+	}
1683
1684	<	public class MediumRunnable implements Runnable {
1684	>	public static class TrackedLongRunnable implements Runnable {
1685	>	public volatile boolean done = false;
1686		public void run() {
1687		try {
1688	<	Thread.sleep(MEDIUM_DELAY_MS);
1689	<	}
1690	<	catch(Exception e) {
228	<	threadFail("unexpectedException");
229	<	}
1688	>	delay(LONG_DELAY_MS);
1689	>	done = true;
1690	>	} catch (InterruptedException ok) {}
1691		}
1692		}
1693
1694	<	public class MediumInterruptedRunnable implements Runnable {
1694	>	public static class TrackedNoOpRunnable implements Runnable {
1695	>	public volatile boolean done = false;
1696		public void run() {
1697	+	done = true;
1698	+	}
1699	+	}
1700	+
1701	+	public static class TrackedCallable implements Callable {
1702	+	public volatile boolean done = false;
1703	+	public Object call() {
1704	+	try {
1705	+	delay(SMALL_DELAY_MS);
1706	+	done = true;
1707	+	} catch (InterruptedException ok) {}
1708	+	return Boolean.TRUE;
1709	+	}
1710	+	}
1711	+
1712	+	/**
1713	+	* Analog of CheckedRunnable for RecursiveAction
1714	+	*/
1715	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1716	+	protected abstract void realCompute() throws Throwable;
1717	+
1718	+	@Override protected final void compute() {
1719		try {
1720	<	Thread.sleep(MEDIUM_DELAY_MS);
1721	<	threadFail("should throw IE");
1720	>	realCompute();
1721	>	} catch (Throwable fail) {
1722	>	threadUnexpectedException(fail);
1723		}
1724	<	catch(InterruptedException success) {
1724	>	}
1725	>	}
1726	>
1727	>	/**
1728	>	* Analog of CheckedCallable for RecursiveTask
1729	>	*/
1730	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1731	>	protected abstract T realCompute() throws Throwable;
1732	>
1733	>	@Override protected final T compute() {
1734	>	try {
1735	>	return realCompute();
1736	>	} catch (Throwable fail) {
1737	>	threadUnexpectedException(fail);
1738	>	return null;
1739		}
1740		}
1741		}
1742
1743	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1744	<	public void run() {
1743	>	/**
1744	>	* For use as RejectedExecutionHandler in constructors
1745	>	*/
1746	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1747	>	public void rejectedExecution(Runnable r,
1748	>	ThreadPoolExecutor executor) {}
1749	>	}
1750	>
1751	>	/**
1752	>	* A CyclicBarrier that uses timed await and fails with
1753	>	* AssertionFailedErrors instead of throwing checked exceptions.
1754	>	*/
1755	>	public class CheckedBarrier extends CyclicBarrier {
1756	>	public CheckedBarrier(int parties) { super(parties); }
1757	>
1758	>	public int await() {
1759		try {
1760	<	Thread.sleep(MEDIUM_DELAY_MS);
1760	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1761	>	} catch (TimeoutException timedOut) {
1762	>	throw new AssertionFailedError("timed out");
1763	>	} catch (Exception fail) {
1764	>	AssertionFailedError afe =
1765	>	new AssertionFailedError("Unexpected exception: " + fail);
1766	>	afe.initCause(fail);
1767	>	throw afe;
1768		}
1769	<	catch(InterruptedException success) {
1769	>	}
1770	>	}
1771	>
1772	>	void checkEmpty(BlockingQueue q) {
1773	>	try {
1774	>	assertTrue(q.isEmpty());
1775	>	assertEquals(0, q.size());
1776	>	assertNull(q.peek());
1777	>	assertNull(q.poll());
1778	>	assertNull(q.poll(0, MILLISECONDS));
1779	>	assertEquals(q.toString(), "[]");
1780	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1781	>	assertFalse(q.iterator().hasNext());
1782	>	try {
1783	>	q.element();
1784	>	shouldThrow();
1785	>	} catch (NoSuchElementException success) {}
1786	>	try {
1787	>	q.iterator().next();
1788	>	shouldThrow();
1789	>	} catch (NoSuchElementException success) {}
1790	>	try {
1791	>	q.remove();
1792	>	shouldThrow();
1793	>	} catch (NoSuchElementException success) {}
1794	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1795	>	}
1796	>
1797	>	void assertSerialEquals(Object x, Object y) {
1798	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1799	>	}
1800	>
1801	>	void assertNotSerialEquals(Object x, Object y) {
1802	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1803	>	}
1804	>
1805	>	byte[] serialBytes(Object o) {
1806	>	try {
1807	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1808	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1809	>	oos.writeObject(o);
1810	>	oos.flush();
1811	>	oos.close();
1812	>	return bos.toByteArray();
1813	>	} catch (Throwable fail) {
1814	>	threadUnexpectedException(fail);
1815	>	return new byte[0];
1816	>	}
1817	>	}
1818	>
1819	>	@SuppressWarnings("unchecked")
1820	>	<T> T serialClone(T o) {
1821	>	try {
1822	>	ObjectInputStream ois = new ObjectInputStream
1823	>	(new ByteArrayInputStream(serialBytes(o)));
1824	>	T clone = (T) ois.readObject();
1825	>	assertSame(o.getClass(), clone.getClass());
1826	>	return clone;
1827	>	} catch (Throwable fail) {
1828	>	threadUnexpectedException(fail);
1829	>	return null;
1830	>	}
1831	>	}
1832	>
1833	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1834	>	Runnable... throwingActions) {
1835	>	for (Runnable throwingAction : throwingActions) {
1836	>	boolean threw = false;
1837	>	try { throwingAction.run(); }
1838	>	catch (Throwable t) {
1839	>	threw = true;
1840	>	if (!expectedExceptionClass.isInstance(t)) {
1841	>	AssertionFailedError afe =
1842	>	new AssertionFailedError
1843	>	("Expected " + expectedExceptionClass.getName() +
1844	>	", got " + t.getClass().getName());
1845	>	afe.initCause(t);
1846	>	threadUnexpectedException(afe);
1847	>	}
1848		}
1849	+	if (!threw)
1850	+	shouldThrow(expectedExceptionClass.getName());
1851		}
1852		}
1853	<
1853	>
1854	>	public void assertIteratorExhausted(Iterator<?> it) {
1855	>	try {
1856	>	it.next();
1857	>	shouldThrow();
1858	>	} catch (NoSuchElementException success) {}
1859	>	assertFalse(it.hasNext());
1860	>	}
1861	>
1862	>	public <T> Callable<T> callableThrowing(final Exception ex) {
1863	>	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1864	>	}
1865	>
1866	>	public Runnable runnableThrowing(final RuntimeException ex) {
1867	>	return new Runnable() { public void run() { throw ex; }};
1868	>	}
1869	>
1870	>	/** A reusable thread pool to be shared by tests. */
1871	>	static final ExecutorService cachedThreadPool =
1872	>	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1873	>	1000L, MILLISECONDS,
1874	>	new SynchronousQueue<Runnable>());
1875	>
1876		}

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