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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.3 by dl, Sat Sep 20 18:20:08 2003 UTC vs.
Revision 1.197 by jsr166, Wed Jun 22 14:40:36 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	>	*/
17
18	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
19	+	import static java.util.concurrent.TimeUnit.MINUTES;
20	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
21	+
22	+	import java.io.ByteArrayInputStream;
23	+	import java.io.ByteArrayOutputStream;
24	+	import java.io.ObjectInputStream;
25	+	import java.io.ObjectOutputStream;
26	+	import java.lang.management.ManagementFactory;
27	+	import java.lang.management.ThreadInfo;
28	+	import java.lang.management.ThreadMXBean;
29	+	import java.lang.reflect.Constructor;
30	+	import java.lang.reflect.Method;
31	+	import java.lang.reflect.Modifier;
32	+	import java.nio.file.Files;
33	+	import java.nio.file.Paths;
34	+	import java.security.CodeSource;
35	+	import java.security.Permission;
36	+	import java.security.PermissionCollection;
37	+	import java.security.Permissions;
38	+	import java.security.Policy;
39	+	import java.security.ProtectionDomain;
40	+	import java.security.SecurityPermission;
41	+	import java.util.ArrayList;
42	+	import java.util.Arrays;
43	+	import java.util.Date;
44	+	import java.util.Enumeration;
45	+	import java.util.Iterator;
46	+	import java.util.List;
47	+	import java.util.NoSuchElementException;
48	+	import java.util.PropertyPermission;
49	+	import java.util.concurrent.BlockingQueue;
50	+	import java.util.concurrent.Callable;
51	+	import java.util.concurrent.CountDownLatch;
52	+	import java.util.concurrent.CyclicBarrier;
53	+	import java.util.concurrent.ExecutionException;
54	+	import java.util.concurrent.Executors;
55	+	import java.util.concurrent.ExecutorService;
56	+	import java.util.concurrent.ForkJoinPool;
57	+	import java.util.concurrent.Future;
58	+	import java.util.concurrent.RecursiveAction;
59	+	import java.util.concurrent.RecursiveTask;
60	+	import java.util.concurrent.RejectedExecutionHandler;
61	+	import java.util.concurrent.Semaphore;
62	+	import java.util.concurrent.SynchronousQueue;
63	+	import java.util.concurrent.ThreadFactory;
64	+	import java.util.concurrent.ThreadPoolExecutor;
65	+	import java.util.concurrent.TimeoutException;
66	+	import java.util.concurrent.atomic.AtomicBoolean;
67	+	import java.util.concurrent.atomic.AtomicReference;
68	+	import java.util.regex.Matcher;
69	+	import java.util.regex.Pattern;
70	+
71	+	import junit.framework.AssertionFailedError;
72	+	import junit.framework.Test;
73	+	import junit.framework.TestCase;
74	+	import junit.framework.TestResult;
75	+	import junit.framework.TestSuite;
76
77		/**
78	<	* Base class for JSR166 Junit TCK tests.  Defines some constants and
79	<	* utility methods, as well as a simple framework for helping to make
80	<	* sure that assertions failing in generated threads cause the
81	<	* associated test that generated them to itself fail (which JUnit doe
82	<	* not otherwise arrange).  The rules for creating such tests are:
78	>	* Base class for JSR166 Junit TCK tests.  Defines some constants,
79	>	* utility methods and classes, as well as a simple framework for
80	>	* helping to make sure that assertions failing in generated threads
81	>	* cause the associated test that generated them to itself fail (which
82	>	* JUnit does not otherwise arrange).  The rules for creating such
83	>	* tests are:
84		*
85		* <ol>
86		*
87	<	* <li> All assertions in code running in generated threads must use
88	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
89	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
90	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
87	>	* <li>All assertions in code running in generated threads must use
88	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
89	>	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
90	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
91		* particularly recommended) for other code to use these forms too.
92		* Only the most typically used JUnit assertion methods are defined
93	<	* this way, but enough to live with.</li>
93	>	* this way, but enough to live with.
94		*
95	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
96	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
95	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
96	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
97		* them. These methods are used to clear and check for thread
98	<	* assertion failures.</li>
98	>	* assertion failures.
99		*
100	<	* <li>All delays and timeouts must use one of the constants {@link
101	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
102	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
103	<	* discriminatable from zero time, and always allows enough time for
104	<	* the small amounts of computation (creating a thread, calling a few
100	>	* <li>All delays and timeouts must use one of the constants {@code
101	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
102	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
103	>	* discriminable from zero time, and always allows enough time for the
104	>	* small amounts of computation (creating a thread, calling a few
105		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
106		* is always discriminable as larger than SHORT and smaller than
107		* MEDIUM.  And so on. These constants are set to conservative values,
108		* but even so, if there is ever any doubt, they can all be increased
109	<	* in one spot to rerun tests on slower platforms</li>
109	>	* in one spot to rerun tests on slower platforms.
110		*
111	<	* <li> All threads generated must be joined inside each test case
112	<	* method (or <tt>fail</tt> to do so) before returning from the
113	<	* method. The {@link joinPool} method can be used to do this when
114	<	* using Executors.</li>
111	>	* <li>All threads generated must be joined inside each test case
112	>	* method (or {@code fail} to do so) before returning from the
113	>	* method. The {@code joinPool} method can be used to do this when
114	>	* using Executors.
115		*
116		* </ol>
117	+	*
118	+	* <p><b>Other notes</b>
119	+	* <ul>
120	+	*
121	+	* <li>Usually, there is one testcase method per JSR166 method
122	+	* covering "normal" operation, and then as many exception-testing
123	+	* methods as there are exceptions the method can throw. Sometimes
124	+	* there are multiple tests per JSR166 method when the different
125	+	* "normal" behaviors differ significantly. And sometimes testcases
126	+	* cover multiple methods when they cannot be tested in isolation.
127	+	*
128	+	* <li>The documentation style for testcases is to provide as javadoc
129	+	* a simple sentence or two describing the property that the testcase
130	+	* method purports to test. The javadocs do not say anything about how
131	+	* the property is tested. To find out, read the code.
132	+	*
133	+	* <li>These tests are "conformance tests", and do not attempt to
134	+	* test throughput, latency, scalability or other performance factors
135	+	* (see the separate "jtreg" tests for a set intended to check these
136	+	* for the most central aspects of functionality.) So, most tests use
137	+	* the smallest sensible numbers of threads, collection sizes, etc
138	+	* needed to check basic conformance.
139	+	*
140	+	* <li>The test classes currently do not declare inclusion in
141	+	* any particular package to simplify things for people integrating
142	+	* them in TCK test suites.
143	+	*
144	+	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
145	+	* runs all JSR166 unit tests.
146	+	*
147	+	* </ul>
148		*/
149		public class JSR166TestCase extends TestCase {
150	+	private static final boolean useSecurityManager =
151	+	Boolean.getBoolean("jsr166.useSecurityManager");
152	+
153	+	protected static final boolean expensiveTests =
154	+	Boolean.getBoolean("jsr166.expensiveTests");
155	+
156	+	/**
157	+	* If true, also run tests that are not part of the official tck
158	+	* because they test unspecified implementation details.
159	+	*/
160	+	protected static final boolean testImplementationDetails =
161	+	Boolean.getBoolean("jsr166.testImplementationDetails");
162	+
163	+	/**
164	+	* If true, report on stdout all "slow" tests, that is, ones that
165	+	* take more than profileThreshold milliseconds to execute.
166	+	*/
167	+	private static final boolean profileTests =
168	+	Boolean.getBoolean("jsr166.profileTests");
169	+
170	+	/**
171	+	* The number of milliseconds that tests are permitted for
172	+	* execution without being reported, when profileTests is set.
173	+	*/
174	+	private static final long profileThreshold =
175	+	Long.getLong("jsr166.profileThreshold", 100);
176	+
177	+	/**
178	+	* The number of repetitions per test (for tickling rare bugs).
179	+	*/
180	+	private static final int runsPerTest =
181	+	Integer.getInteger("jsr166.runsPerTest", 1);
182	+
183	+	/**
184	+	* The number of repetitions of the test suite (for finding leaks?).
185	+	*/
186	+	private static final int suiteRuns =
187	+	Integer.getInteger("jsr166.suiteRuns", 1);
188	+
189	+	/**
190	+	* Returns the value of the system property, or NaN if not defined.
191	+	*/
192	+	private static float systemPropertyValue(String name) {
193	+	String floatString = System.getProperty(name);
194	+	if (floatString == null)
195	+	return Float.NaN;
196	+	try {
197	+	return Float.parseFloat(floatString);
198	+	} catch (NumberFormatException ex) {
199	+	throw new IllegalArgumentException(
200	+	String.format("Bad float value in system property %s=%s",
201	+	name, floatString));
202	+	}
203	+	}
204	+
205	+	/**
206	+	* The scaling factor to apply to standard delays used in tests.
207	+	* May be initialized from any of:
208	+	* - the "jsr166.delay.factor" system property
209	+	* - the "test.timeout.factor" system property (as used by jtreg)
210	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
211	+	* - hard-coded fuzz factor when using a known slowpoke VM
212	+	*/
213	+	private static final float delayFactor = delayFactor();
214	+
215	+	private static float delayFactor() {
216	+	float x;
217	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
218	+	return x;
219	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
220	+	return x;
221	+	String prop = System.getProperty("java.vm.version");
222	+	if (prop != null && prop.matches(".*debug.*"))
223	+	return 4.0f; // How much slower is fastdebug than product?!
224	+	return 1.0f;
225	+	}
226	+
227	+	public JSR166TestCase() { super(); }
228	+	public JSR166TestCase(String name) { super(name); }
229	+
230	+	/**
231	+	* A filter for tests to run, matching strings of the form
232	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
233	+	* Usefully combined with jsr166.runsPerTest.
234	+	*/
235	+	private static final Pattern methodFilter = methodFilter();
236	+
237	+	private static Pattern methodFilter() {
238	+	String regex = System.getProperty("jsr166.methodFilter");
239	+	return (regex == null) ? null : Pattern.compile(regex);
240	+	}
241	+
242	+	// Instrumentation to debug very rare, but very annoying hung test runs.
243	+	static volatile TestCase currentTestCase;
244	+	// static volatile int currentRun = 0;
245	+	static {
246	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
247	+	// Avoid spurious reports with enormous runsPerTest.
248	+	// A single test case run should never take more than 1 second.
249	+	// But let's cap it at the high end too ...
250	+	final int timeoutMinutes =
251	+	Math.min(15, Math.max(runsPerTest / 60, 1));
252	+	for (TestCase lastTestCase = currentTestCase;;) {
253	+	try { MINUTES.sleep(timeoutMinutes); }
254	+	catch (InterruptedException unexpected) { break; }
255	+	if (lastTestCase == currentTestCase) {
256	+	System.err.printf(
257	+	"Looks like we're stuck running test: %s%n",
258	+	lastTestCase);
259	+	//                     System.err.printf(
260	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
261	+	//                         lastTestCase, currentRun, runsPerTest);
262	+	//                     System.err.println("availableProcessors=" +
263	+	//                         Runtime.getRuntime().availableProcessors());
264	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
265	+	dumpTestThreads();
266	+	// one stack dump is probably enough; more would be spam
267	+	break;
268	+	}
269	+	lastTestCase = currentTestCase;
270	+	}}};
271	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
272	+	thread.setDaemon(true);
273	+	thread.start();
274	+	}
275	+
276	+	//     public static String cpuModel() {
277	+	//         try {
278	+	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
279	+	//                 .matcher(new String(
280	+	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
281	+	//             matcher.find();
282	+	//             return matcher.group(1);
283	+	//         } catch (Exception ex) { return null; }
284	+	//     }
285	+
286	+	public void runBare() throws Throwable {
287	+	currentTestCase = this;
288	+	if (methodFilter == null
289	+	|| methodFilter.matcher(toString()).find())
290	+	super.runBare();
291	+	}
292	+
293	+	protected void runTest() throws Throwable {
294	+	for (int i = 0; i < runsPerTest; i++) {
295	+	// currentRun = i;
296	+	if (profileTests)
297	+	runTestProfiled();
298	+	else
299	+	super.runTest();
300	+	}
301	+	}
302	+
303	+	protected void runTestProfiled() throws Throwable {
304	+	for (int i = 0; i < 2; i++) {
305	+	long startTime = System.nanoTime();
306	+	super.runTest();
307	+	long elapsedMillis = millisElapsedSince(startTime);
308	+	if (elapsedMillis < profileThreshold)
309	+	break;
310	+	// Never report first run of any test; treat it as a
311	+	// warmup run, notably to trigger all needed classloading,
312	+	if (i > 0)
313	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
314	+	}
315	+	}
316	+
317	+	/**
318	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
319	+	*/
320	+	public static void main(String[] args) {
321	+	main(suite(), args);
322	+	}
323	+
324	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
325	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
326	+	long runTime;
327	+	public void startTest(Test test) {}
328	+	protected void printHeader(long runTime) {
329	+	this.runTime = runTime; // defer printing for later
330	+	}
331	+	protected void printFooter(TestResult result) {
332	+	if (result.wasSuccessful()) {
333	+	getWriter().println("OK (" + result.runCount() + " tests)"
334	+	+ "  Time: " + elapsedTimeAsString(runTime));
335	+	} else {
336	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
337	+	super.printFooter(result);
338	+	}
339	+	}
340	+	}
341	+
342	+	/**
343	+	* Returns a TestRunner that doesn't bother with unnecessary
344	+	* fluff, like printing a "." for each test case.
345	+	*/
346	+	static junit.textui.TestRunner newPithyTestRunner() {
347	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
348	+	runner.setPrinter(new PithyResultPrinter(System.out));
349	+	return runner;
350	+	}
351	+
352	+	/**
353	+	* Runs all unit tests in the given test suite.
354	+	* Actual behavior influenced by jsr166.* system properties.
355	+	*/
356	+	static void main(Test suite, String[] args) {
357	+	if (useSecurityManager) {
358	+	System.err.println("Setting a permissive security manager");
359	+	Policy.setPolicy(permissivePolicy());
360	+	System.setSecurityManager(new SecurityManager());
361	+	}
362	+	for (int i = 0; i < suiteRuns; i++) {
363	+	TestResult result = newPithyTestRunner().doRun(suite);
364	+	if (!result.wasSuccessful())
365	+	System.exit(1);
366	+	System.gc();
367	+	System.runFinalization();
368	+	}
369	+	}
370	+
371	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
372	+	TestSuite suite = new TestSuite();
373	+	for (Object suiteOrClass : suiteOrClasses) {
374	+	if (suiteOrClass instanceof TestSuite)
375	+	suite.addTest((TestSuite) suiteOrClass);
376	+	else if (suiteOrClass instanceof Class)
377	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
378	+	else
379	+	throw new ClassCastException("not a test suite or class");
380	+	}
381	+	return suite;
382	+	}
383	+
384	+	public static void addNamedTestClasses(TestSuite suite,
385	+	String... testClassNames) {
386	+	for (String testClassName : testClassNames) {
387	+	try {
388	+	Class<?> testClass = Class.forName(testClassName);
389	+	Method m = testClass.getDeclaredMethod("suite",
390	+	new Class<?>[0]);
391	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
392	+	} catch (Exception e) {
393	+	throw new Error("Missing test class", e);
394	+	}
395	+	}
396	+	}
397	+
398	+	public static final double JAVA_CLASS_VERSION;
399	+	public static final String JAVA_SPECIFICATION_VERSION;
400	+	static {
401	+	try {
402	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
403	+	new java.security.PrivilegedAction<Double>() {
404	+	public Double run() {
405	+	return Double.valueOf(System.getProperty("java.class.version"));}});
406	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
407	+	new java.security.PrivilegedAction<String>() {
408	+	public String run() {
409	+	return System.getProperty("java.specification.version");}});
410	+	} catch (Throwable t) {
411	+	throw new Error(t);
412	+	}
413	+	}
414	+
415	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
416	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
417	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
418	+	public static boolean atLeastJava9() {
419	+	return JAVA_CLASS_VERSION >= 53.0
420	+	// As of 2015-09, java9 still uses 52.0 class file version
421	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
422	+	}
423	+	public static boolean atLeastJava10() {
424	+	return JAVA_CLASS_VERSION >= 54.0
425	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
426	+	}
427	+
428	+	/**
429	+	* Collects all JSR166 unit tests as one suite.
430	+	*/
431	+	public static Test suite() {
432	+	// Java7+ test classes
433	+	TestSuite suite = newTestSuite(
434	+	ForkJoinPoolTest.suite(),
435	+	ForkJoinTaskTest.suite(),
436	+	RecursiveActionTest.suite(),
437	+	RecursiveTaskTest.suite(),
438	+	LinkedTransferQueueTest.suite(),
439	+	PhaserTest.suite(),
440	+	ThreadLocalRandomTest.suite(),
441	+	AbstractExecutorServiceTest.suite(),
442	+	AbstractQueueTest.suite(),
443	+	AbstractQueuedSynchronizerTest.suite(),
444	+	AbstractQueuedLongSynchronizerTest.suite(),
445	+	ArrayBlockingQueueTest.suite(),
446	+	ArrayDequeTest.suite(),
447	+	AtomicBooleanTest.suite(),
448	+	AtomicIntegerArrayTest.suite(),
449	+	AtomicIntegerFieldUpdaterTest.suite(),
450	+	AtomicIntegerTest.suite(),
451	+	AtomicLongArrayTest.suite(),
452	+	AtomicLongFieldUpdaterTest.suite(),
453	+	AtomicLongTest.suite(),
454	+	AtomicMarkableReferenceTest.suite(),
455	+	AtomicReferenceArrayTest.suite(),
456	+	AtomicReferenceFieldUpdaterTest.suite(),
457	+	AtomicReferenceTest.suite(),
458	+	AtomicStampedReferenceTest.suite(),
459	+	ConcurrentHashMapTest.suite(),
460	+	ConcurrentLinkedDequeTest.suite(),
461	+	ConcurrentLinkedQueueTest.suite(),
462	+	ConcurrentSkipListMapTest.suite(),
463	+	ConcurrentSkipListSubMapTest.suite(),
464	+	ConcurrentSkipListSetTest.suite(),
465	+	ConcurrentSkipListSubSetTest.suite(),
466	+	CopyOnWriteArrayListTest.suite(),
467	+	CopyOnWriteArraySetTest.suite(),
468	+	CountDownLatchTest.suite(),
469	+	CyclicBarrierTest.suite(),
470	+	DelayQueueTest.suite(),
471	+	EntryTest.suite(),
472	+	ExchangerTest.suite(),
473	+	ExecutorsTest.suite(),
474	+	ExecutorCompletionServiceTest.suite(),
475	+	FutureTaskTest.suite(),
476	+	LinkedBlockingDequeTest.suite(),
477	+	LinkedBlockingQueueTest.suite(),
478	+	LinkedListTest.suite(),
479	+	LockSupportTest.suite(),
480	+	PriorityBlockingQueueTest.suite(),
481	+	PriorityQueueTest.suite(),
482	+	ReentrantLockTest.suite(),
483	+	ReentrantReadWriteLockTest.suite(),
484	+	ScheduledExecutorTest.suite(),
485	+	ScheduledExecutorSubclassTest.suite(),
486	+	SemaphoreTest.suite(),
487	+	SynchronousQueueTest.suite(),
488	+	SystemTest.suite(),
489	+	ThreadLocalTest.suite(),
490	+	ThreadPoolExecutorTest.suite(),
491	+	ThreadPoolExecutorSubclassTest.suite(),
492	+	ThreadTest.suite(),
493	+	TimeUnitTest.suite(),
494	+	TreeMapTest.suite(),
495	+	TreeSetTest.suite(),
496	+	TreeSubMapTest.suite(),
497	+	TreeSubSetTest.suite());
498	+
499	+	// Java8+ test classes
500	+	if (atLeastJava8()) {
501	+	String[] java8TestClassNames = {
502	+	"Atomic8Test",
503	+	"CompletableFutureTest",
504	+	"ConcurrentHashMap8Test",
505	+	"CountedCompleterTest",
506	+	"DoubleAccumulatorTest",
507	+	"DoubleAdderTest",
508	+	"ForkJoinPool8Test",
509	+	"ForkJoinTask8Test",
510	+	"LongAccumulatorTest",
511	+	"LongAdderTest",
512	+	"SplittableRandomTest",
513	+	"StampedLockTest",
514	+	"SubmissionPublisherTest",
515	+	"ThreadLocalRandom8Test",
516	+	"TimeUnit8Test",
517	+	};
518	+	addNamedTestClasses(suite, java8TestClassNames);
519	+	}
520	+
521	+	// Java9+ test classes
522	+	if (atLeastJava9()) {
523	+	String[] java9TestClassNames = {
524	+	"AtomicBoolean9Test",
525	+	"AtomicInteger9Test",
526	+	"AtomicIntegerArray9Test",
527	+	"AtomicLong9Test",
528	+	"AtomicLongArray9Test",
529	+	"AtomicReference9Test",
530	+	"AtomicReferenceArray9Test",
531	+	"ExecutorCompletionService9Test",
532	+	};
533	+	addNamedTestClasses(suite, java9TestClassNames);
534	+	}
535	+
536	+	return suite;
537	+	}
538	+
539	+	/** Returns list of junit-style test method names in given class. */
540	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
541	+	Method[] methods = testClass.getDeclaredMethods();
542	+	ArrayList<String> names = new ArrayList<String>(methods.length);
543	+	for (Method method : methods) {
544	+	if (method.getName().startsWith("test")
545	+	&& Modifier.isPublic(method.getModifiers())
546	+	// method.getParameterCount() requires jdk8+
547	+	&& method.getParameterTypes().length == 0) {
548	+	names.add(method.getName());
549	+	}
550	+	}
551	+	return names;
552	+	}
553	+
554	+	/**
555	+	* Returns junit-style testSuite for the given test class, but
556	+	* parameterized by passing extra data to each test.
557	+	*/
558	+	public static <ExtraData> Test parameterizedTestSuite
559	+	(Class<? extends JSR166TestCase> testClass,
560	+	Class<ExtraData> dataClass,
561	+	ExtraData data) {
562	+	try {
563	+	TestSuite suite = new TestSuite();
564	+	Constructor c =
565	+	testClass.getDeclaredConstructor(dataClass, String.class);
566	+	for (String methodName : testMethodNames(testClass))
567	+	suite.addTest((Test) c.newInstance(data, methodName));
568	+	return suite;
569	+	} catch (Exception e) {
570	+	throw new Error(e);
571	+	}
572	+	}
573	+
574	+	/**
575	+	* Returns junit-style testSuite for the jdk8 extension of the
576	+	* given test class, but parameterized by passing extra data to
577	+	* each test.  Uses reflection to allow compilation in jdk7.
578	+	*/
579	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
580	+	(Class<? extends JSR166TestCase> testClass,
581	+	Class<ExtraData> dataClass,
582	+	ExtraData data) {
583	+	if (atLeastJava8()) {
584	+	String name = testClass.getName();
585	+	String name8 = name.replaceAll("Test$", "8Test");
586	+	if (name.equals(name8)) throw new Error(name);
587	+	try {
588	+	return (Test)
589	+	Class.forName(name8)
590	+	.getMethod("testSuite", new Class[] { dataClass })
591	+	.invoke(null, data);
592	+	} catch (Exception e) {
593	+	throw new Error(e);
594	+	}
595	+	} else {
596	+	return new TestSuite();
597	+	}
598	+	}
599	+
600	+	// Delays for timing-dependent tests, in milliseconds.
601
602		public static long SHORT_DELAY_MS;
603		public static long SMALL_DELAY_MS;
604		public static long MEDIUM_DELAY_MS;
605		public static long LONG_DELAY_MS;
606
61	–
607		/**
608	<	* Return the shortest timed delay. This could
609	<	* be reimplmented to use for example a Property.
610	<	*/
608	>	* Returns the shortest timed delay. This can be scaled up for
609	>	* slow machines using the jsr166.delay.factor system property,
610	>	* or via jtreg's -timeoutFactor: flag.
611	>	* http://openjdk.java.net/jtreg/command-help.html
612	>	*/
613		protected long getShortDelay() {
614	<	return 50;
614	>	return (long) (50 * delayFactor);
615		}
616
70	–
617		/**
618	<	* Set delays as multiples fo SHORT_DELAY.
618	>	* Sets delays as multiples of SHORT_DELAY.
619		*/
620	<	protected  void setDelays() {
620	>	protected void setDelays() {
621		SHORT_DELAY_MS = getShortDelay();
622	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
622	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
623		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
624	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
624	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
625	>	}
626	>
627	>	/**
628	>	* Returns a timeout in milliseconds to be used in tests that
629	>	* verify that operations block or time out.
630	>	*/
631	>	long timeoutMillis() {
632	>	return SHORT_DELAY_MS / 4;
633		}
634
635		/**
636	<	* Flag set true if any threadAssert methods fail
636	>	* Returns a new Date instance representing a time at least
637	>	* delayMillis milliseconds in the future.
638		*/
639	<	protected volatile boolean threadFailed;
639	>	Date delayedDate(long delayMillis) {
640	>	// Add 1 because currentTimeMillis is known to round into the past.
641	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
642	>	}
643
644		/**
645	<	* Initialize test to indicat that no thread assertions have failed
645	>	* The first exception encountered if any threadAssertXXX method fails.
646		*/
647	<	public void setUp() {
647	>	private final AtomicReference<Throwable> threadFailure
648	>	= new AtomicReference<Throwable>(null);
649	>
650	>	/**
651	>	* Records an exception so that it can be rethrown later in the test
652	>	* harness thread, triggering a test case failure.  Only the first
653	>	* failure is recorded; subsequent calls to this method from within
654	>	* the same test have no effect.
655	>	*/
656	>	public void threadRecordFailure(Throwable t) {
657	>	System.err.println(t);
658	>	dumpTestThreads();
659	>	threadFailure.compareAndSet(null, t);
660	>	}
661	>
662	>	public void setUp() {
663		setDelays();
664	<	threadFailed = false;
664	>	}
665	>
666	>	void tearDownFail(String format, Object... args) {
667	>	String msg = toString() + ": " + String.format(format, args);
668	>	System.err.println(msg);
669	>	dumpTestThreads();
670	>	throw new AssertionFailedError(msg);
671	>	}
672	>
673	>	/**
674	>	* Extra checks that get done for all test cases.
675	>	*
676	>	* Triggers test case failure if any thread assertions have failed,
677	>	* by rethrowing, in the test harness thread, any exception recorded
678	>	* earlier by threadRecordFailure.
679	>	*
680	>	* Triggers test case failure if interrupt status is set in the main thread.
681	>	*/
682	>	public void tearDown() throws Exception {
683	>	Throwable t = threadFailure.getAndSet(null);
684	>	if (t != null) {
685	>	if (t instanceof Error)
686	>	throw (Error) t;
687	>	else if (t instanceof RuntimeException)
688	>	throw (RuntimeException) t;
689	>	else if (t instanceof Exception)
690	>	throw (Exception) t;
691	>	else {
692	>	AssertionFailedError afe =
693	>	new AssertionFailedError(t.toString());
694	>	afe.initCause(t);
695	>	throw afe;
696	>	}
697	>	}
698	>
699	>	if (Thread.interrupted())
700	>	tearDownFail("interrupt status set in main thread");
701	>
702	>	checkForkJoinPoolThreadLeaks();
703		}
704
705		/**
706	<	* Trigger test case failure if any thread assertions have failed
706	>	* Finds missing PoolCleaners
707		*/
708	<	public void tearDown() {
709	<	assertFalse(threadFailed);
708	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
709	>	Thread[] survivors = new Thread[7];
710	>	int count = Thread.enumerate(survivors);
711	>	for (int i = 0; i < count; i++) {
712	>	Thread thread = survivors[i];
713	>	String name = thread.getName();
714	>	if (name.startsWith("ForkJoinPool-")) {
715	>	// give thread some time to terminate
716	>	thread.join(LONG_DELAY_MS);
717	>	if (thread.isAlive())
718	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
719	>	thread);
720	>	}
721	>	}
722	>
723	>	if (!ForkJoinPool.commonPool()
724	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
725	>	tearDownFail("ForkJoin common pool thread stuck");
726		}
727
728	+	/**
729	+	* Just like fail(reason), but additionally recording (using
730	+	* threadRecordFailure) any AssertionFailedError thrown, so that
731	+	* the current testcase will fail.
732	+	*/
733		public void threadFail(String reason) {
734	<	threadFailed = true;
735	<	fail(reason);
734	>	try {
735	>	fail(reason);
736	>	} catch (AssertionFailedError t) {
737	>	threadRecordFailure(t);
738	>	throw t;
739	>	}
740		}
741
742	+	/**
743	+	* Just like assertTrue(b), but additionally recording (using
744	+	* threadRecordFailure) any AssertionFailedError thrown, so that
745	+	* the current testcase will fail.
746	+	*/
747		public void threadAssertTrue(boolean b) {
748	<	if (!b) {
108	<	threadFailed = true;
748	>	try {
749		assertTrue(b);
750	+	} catch (AssertionFailedError t) {
751	+	threadRecordFailure(t);
752	+	throw t;
753		}
754		}
755	+
756	+	/**
757	+	* Just like assertFalse(b), but additionally recording (using
758	+	* threadRecordFailure) any AssertionFailedError thrown, so that
759	+	* the current testcase will fail.
760	+	*/
761		public void threadAssertFalse(boolean b) {
762	<	if (b) {
114	<	threadFailed = true;
762	>	try {
763		assertFalse(b);
764	+	} catch (AssertionFailedError t) {
765	+	threadRecordFailure(t);
766	+	throw t;
767		}
768		}
769	+
770	+	/**
771	+	* Just like assertNull(x), but additionally recording (using
772	+	* threadRecordFailure) any AssertionFailedError thrown, so that
773	+	* the current testcase will fail.
774	+	*/
775		public void threadAssertNull(Object x) {
776	<	if (x != null) {
120	<	threadFailed = true;
776	>	try {
777		assertNull(x);
778	+	} catch (AssertionFailedError t) {
779	+	threadRecordFailure(t);
780	+	throw t;
781		}
782		}
783	+
784	+	/**
785	+	* Just like assertEquals(x, y), but additionally recording (using
786	+	* threadRecordFailure) any AssertionFailedError thrown, so that
787	+	* the current testcase will fail.
788	+	*/
789		public void threadAssertEquals(long x, long y) {
790	<	if (x != y) {
126	<	threadFailed = true;
790	>	try {
791		assertEquals(x, y);
792	+	} catch (AssertionFailedError t) {
793	+	threadRecordFailure(t);
794	+	throw t;
795		}
796		}
797	+
798	+	/**
799	+	* Just like assertEquals(x, y), but additionally recording (using
800	+	* threadRecordFailure) any AssertionFailedError thrown, so that
801	+	* the current testcase will fail.
802	+	*/
803		public void threadAssertEquals(Object x, Object y) {
804	<	if (x != y && (x == null || !x.equals(y))) {
132	<	threadFailed = true;
804	>	try {
805		assertEquals(x, y);
806	+	} catch (AssertionFailedError fail) {
807	+	threadRecordFailure(fail);
808	+	throw fail;
809	+	} catch (Throwable fail) {
810	+	threadUnexpectedException(fail);
811	+	}
812	+	}
813	+
814	+	/**
815	+	* Just like assertSame(x, y), but additionally recording (using
816	+	* threadRecordFailure) any AssertionFailedError thrown, so that
817	+	* the current testcase will fail.
818	+	*/
819	+	public void threadAssertSame(Object x, Object y) {
820	+	try {
821	+	assertSame(x, y);
822	+	} catch (AssertionFailedError fail) {
823	+	threadRecordFailure(fail);
824	+	throw fail;
825		}
826		}
827
828	+	/**
829	+	* Calls threadFail with message "should throw exception".
830	+	*/
831		public void threadShouldThrow() {
832	<	threadFailed = true;
833	<	fail("should throw exception");
832	>	threadFail("should throw exception");
833	>	}
834	>
835	>	/**
836	>	* Calls threadFail with message "should throw" + exceptionName.
837	>	*/
838	>	public void threadShouldThrow(String exceptionName) {
839	>	threadFail("should throw " + exceptionName);
840	>	}
841	>
842	>	/**
843	>	* Records the given exception using {@link #threadRecordFailure},
844	>	* then rethrows the exception, wrapping it in an
845	>	* AssertionFailedError if necessary.
846	>	*/
847	>	public void threadUnexpectedException(Throwable t) {
848	>	threadRecordFailure(t);
849	>	t.printStackTrace();
850	>	if (t instanceof RuntimeException)
851	>	throw (RuntimeException) t;
852	>	else if (t instanceof Error)
853	>	throw (Error) t;
854	>	else {
855	>	AssertionFailedError afe =
856	>	new AssertionFailedError("unexpected exception: " + t);
857	>	afe.initCause(t);
858	>	throw afe;
859	>	}
860		}
861
862	<	public void threadUnexpectedException() {
863	<	threadFailed = true;
864	<	fail("Unexpected exception");
862	>	/**
863	>	* Delays, via Thread.sleep, for the given millisecond delay, but
864	>	* if the sleep is shorter than specified, may re-sleep or yield
865	>	* until time elapses.  Ensures that the given time, as measured
866	>	* by System.nanoTime(), has elapsed.
867	>	*/
868	>	static void delay(long millis) throws InterruptedException {
869	>	long nanos = millis * (1000 * 1000);
870	>	final long wakeupTime = System.nanoTime() + nanos;
871	>	do {
872	>	if (millis > 0L)
873	>	Thread.sleep(millis);
874	>	else // too short to sleep
875	>	Thread.yield();
876	>	nanos = wakeupTime - System.nanoTime();
877	>	millis = nanos / (1000 * 1000);
878	>	} while (nanos >= 0L);
879		}
880
881	+	/**
882	+	* Allows use of try-with-resources with per-test thread pools.
883	+	*/
884	+	class PoolCleaner implements AutoCloseable {
885	+	private final ExecutorService pool;
886	+	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
887	+	public void close() { joinPool(pool); }
888	+	}
889
890		/**
891	<	* Wait out termination of a thread pool or fail doing so
891	>	* An extension of PoolCleaner that has an action to release the pool.
892		*/
893	<	public void joinPool(ExecutorService exec) {
893	>	class PoolCleanerWithReleaser extends PoolCleaner {
894	>	private final Runnable releaser;
895	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
896	>	super(pool);
897	>	this.releaser = releaser;
898	>	}
899	>	public void close() {
900	>	try {
901	>	releaser.run();
902	>	} finally {
903	>	super.close();
904	>	}
905	>	}
906	>	}
907	>
908	>	PoolCleaner cleaner(ExecutorService pool) {
909	>	return new PoolCleaner(pool);
910	>	}
911	>
912	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
913	>	return new PoolCleanerWithReleaser(pool, releaser);
914	>	}
915	>
916	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
917	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
918	>	}
919	>
920	>	Runnable releaser(final CountDownLatch latch) {
921	>	return new Runnable() { public void run() {
922	>	do { latch.countDown(); }
923	>	while (latch.getCount() > 0);
924	>	}};
925	>	}
926	>
927	>	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
928	>	return new PoolCleanerWithReleaser(pool, releaser(flag));
929	>	}
930	>
931	>	Runnable releaser(final AtomicBoolean flag) {
932	>	return new Runnable() { public void run() { flag.set(true); }};
933	>	}
934	>
935	>	/**
936	>	* Waits out termination of a thread pool or fails doing so.
937	>	*/
938	>	void joinPool(ExecutorService pool) {
939	>	try {
940	>	pool.shutdown();
941	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
942	>	try {
943	>	threadFail("ExecutorService " + pool +
944	>	" did not terminate in a timely manner");
945	>	} finally {
946	>	// last resort, for the benefit of subsequent tests
947	>	pool.shutdownNow();
948	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
949	>	}
950	>	}
951	>	} catch (SecurityException ok) {
952	>	// Allowed in case test doesn't have privs
953	>	} catch (InterruptedException fail) {
954	>	threadFail("Unexpected InterruptedException");
955	>	}
956	>	}
957	>
958	>	/**
959	>	* Like Runnable, but with the freedom to throw anything.
960	>	* junit folks had the same idea:
961	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
962	>	*/
963	>	interface Action { public void run() throws Throwable; }
964	>
965	>	/**
966	>	* Runs all the given actions in parallel, failing if any fail.
967	>	* Useful for running multiple variants of tests that are
968	>	* necessarily individually slow because they must block.
969	>	*/
970	>	void testInParallel(Action ... actions) {
971	>	ExecutorService pool = Executors.newCachedThreadPool();
972	>	try (PoolCleaner cleaner = cleaner(pool)) {
973	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
974	>	for (final Action action : actions)
975	>	futures.add(pool.submit(new CheckedRunnable() {
976	>	public void realRun() throws Throwable { action.run();}}));
977	>	for (Future<?> future : futures)
978	>	try {
979	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
980	>	} catch (ExecutionException ex) {
981	>	threadUnexpectedException(ex.getCause());
982	>	} catch (Exception ex) {
983	>	threadUnexpectedException(ex);
984	>	}
985	>	}
986	>	}
987	>
988	>	/**
989	>	* A debugging tool to print stack traces of most threads, as jstack does.
990	>	* Uninteresting threads are filtered out.
991	>	*/
992	>	static void dumpTestThreads() {
993	>	SecurityManager sm = System.getSecurityManager();
994	>	if (sm != null) {
995	>	try {
996	>	System.setSecurityManager(null);
997	>	} catch (SecurityException giveUp) {
998	>	return;
999	>	}
1000	>	}
1001	>
1002	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1003	>	System.err.println("------ stacktrace dump start ------");
1004	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1005	>	String name = info.getThreadName();
1006	>	if ("Signal Dispatcher".equals(name))
1007	>	continue;
1008	>	if ("Reference Handler".equals(name)
1009	>	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
1010	>	continue;
1011	>	if ("Finalizer".equals(name)
1012	>	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
1013	>	continue;
1014	>	if ("checkForWedgedTest".equals(name))
1015	>	continue;
1016	>	System.err.print(info);
1017	>	}
1018	>	System.err.println("------ stacktrace dump end ------");
1019	>
1020	>	if (sm != null) System.setSecurityManager(sm);
1021	>	}
1022	>
1023	>	/**
1024	>	* Checks that thread does not terminate within the default
1025	>	* millisecond delay of {@code timeoutMillis()}.
1026	>	*/
1027	>	void assertThreadStaysAlive(Thread thread) {
1028	>	assertThreadStaysAlive(thread, timeoutMillis());
1029	>	}
1030	>
1031	>	/**
1032	>	* Checks that thread does not terminate within the given millisecond delay.
1033	>	*/
1034	>	void assertThreadStaysAlive(Thread thread, long millis) {
1035	>	try {
1036	>	// No need to optimize the failing case via Thread.join.
1037	>	delay(millis);
1038	>	assertTrue(thread.isAlive());
1039	>	} catch (InterruptedException fail) {
1040	>	threadFail("Unexpected InterruptedException");
1041	>	}
1042	>	}
1043	>
1044	>	/**
1045	>	* Checks that the threads do not terminate within the default
1046	>	* millisecond delay of {@code timeoutMillis()}.
1047	>	*/
1048	>	void assertThreadsStayAlive(Thread... threads) {
1049	>	assertThreadsStayAlive(timeoutMillis(), threads);
1050	>	}
1051	>
1052	>	/**
1053	>	* Checks that the threads do not terminate within the given millisecond delay.
1054	>	*/
1055	>	void assertThreadsStayAlive(long millis, Thread... threads) {
1056		try {
1057	<	exec.shutdown();
1058	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
1059	<	} catch(InterruptedException ie) {
1060	<	fail("Unexpected exception");
1057	>	// No need to optimize the failing case via Thread.join.
1058	>	delay(millis);
1059	>	for (Thread thread : threads)
1060	>	assertTrue(thread.isAlive());
1061	>	} catch (InterruptedException fail) {
1062	>	threadFail("Unexpected InterruptedException");
1063		}
1064		}
1065
1066	<
1066	>	/**
1067	>	* Checks that future.get times out, with the default timeout of
1068	>	* {@code timeoutMillis()}.
1069	>	*/
1070	>	void assertFutureTimesOut(Future future) {
1071	>	assertFutureTimesOut(future, timeoutMillis());
1072	>	}
1073	>
1074	>	/**
1075	>	* Checks that future.get times out, with the given millisecond timeout.
1076	>	*/
1077	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
1078	>	long startTime = System.nanoTime();
1079	>	try {
1080	>	future.get(timeoutMillis, MILLISECONDS);
1081	>	shouldThrow();
1082	>	} catch (TimeoutException success) {
1083	>	} catch (Exception fail) {
1084	>	threadUnexpectedException(fail);
1085	>	} finally { future.cancel(true); }
1086	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1087	>	}
1088	>
1089	>	/**
1090	>	* Fails with message "should throw exception".
1091	>	*/
1092		public void shouldThrow() {
1093		fail("Should throw exception");
1094		}
1095
1096	<	public void unexpectedException() {
1097	<	fail("Unexpected exception");
1096	>	/**
1097	>	* Fails with message "should throw " + exceptionName.
1098	>	*/
1099	>	public void shouldThrow(String exceptionName) {
1100	>	fail("Should throw " + exceptionName);
1101		}
1102
169	–
1103		/**
1104		* The number of elements to place in collections, arrays, etc.
1105		*/
#	Line 174 | Line 1107 | public class JSR166TestCase extends Test
1107
1108		// Some convenient Integer constants
1109
1110	<	public static final Integer zero = new Integer(0);
1111	<	public static final Integer one = new Integer(1);
1112	<	public static final Integer two = new Integer(2);
1113	<	public static final Integer three  = new Integer(3);
1110	>	public static final Integer zero  = new Integer(0);
1111	>	public static final Integer one   = new Integer(1);
1112	>	public static final Integer two   = new Integer(2);
1113	>	public static final Integer three = new Integer(3);
1114		public static final Integer four  = new Integer(4);
1115		public static final Integer five  = new Integer(5);
1116	<	public static final Integer six = new Integer(6);
1116	>	public static final Integer six   = new Integer(6);
1117		public static final Integer seven = new Integer(7);
1118		public static final Integer eight = new Integer(8);
1119	<	public static final Integer nine = new Integer(9);
1119	>	public static final Integer nine  = new Integer(9);
1120		public static final Integer m1  = new Integer(-1);
1121		public static final Integer m2  = new Integer(-2);
1122		public static final Integer m3  = new Integer(-3);
1123	<	public static final Integer m4 = new Integer(-4);
1124	<	public static final Integer m5 = new Integer(-5);
1123	>	public static final Integer m4  = new Integer(-4);
1124	>	public static final Integer m5  = new Integer(-5);
1125	>	public static final Integer m6  = new Integer(-6);
1126		public static final Integer m10 = new Integer(-10);
1127
1128	+	/**
1129	+	* Runs Runnable r with a security policy that permits precisely
1130	+	* the specified permissions.  If there is no current security
1131	+	* manager, the runnable is run twice, both with and without a
1132	+	* security manager.  We require that any security manager permit
1133	+	* getPolicy/setPolicy.
1134	+	*/
1135	+	public void runWithPermissions(Runnable r, Permission... permissions) {
1136	+	SecurityManager sm = System.getSecurityManager();
1137	+	if (sm == null) {
1138	+	r.run();
1139	+	}
1140	+	runWithSecurityManagerWithPermissions(r, permissions);
1141	+	}
1142
1143	<	// Some convenient Runnable classes
1143	>	/**
1144	>	* Runs Runnable r with a security policy that permits precisely
1145	>	* the specified permissions.  If there is no current security
1146	>	* manager, a temporary one is set for the duration of the
1147	>	* Runnable.  We require that any security manager permit
1148	>	* getPolicy/setPolicy.
1149	>	*/
1150	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1151	>	Permission... permissions) {
1152	>	SecurityManager sm = System.getSecurityManager();
1153	>	if (sm == null) {
1154	>	Policy savedPolicy = Policy.getPolicy();
1155	>	try {
1156	>	Policy.setPolicy(permissivePolicy());
1157	>	System.setSecurityManager(new SecurityManager());
1158	>	runWithSecurityManagerWithPermissions(r, permissions);
1159	>	} finally {
1160	>	System.setSecurityManager(null);
1161	>	Policy.setPolicy(savedPolicy);
1162	>	}
1163	>	} else {
1164	>	Policy savedPolicy = Policy.getPolicy();
1165	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1166	>	Policy.setPolicy(policy);
1167
1168	<	public static class NoOpRunnable implements Runnable {
1169	<	public void run() {}
1168	>	try {
1169	>	r.run();
1170	>	} finally {
1171	>	policy.addPermission(new SecurityPermission("setPolicy"));
1172	>	Policy.setPolicy(savedPolicy);
1173	>	}
1174	>	}
1175		}
1176
1177	<	public static class NoOpCallable implements Callable {
1178	<	public Object call() { return Boolean.TRUE; }
1177	>	/**
1178	>	* Runs a runnable without any permissions.
1179	>	*/
1180	>	public void runWithoutPermissions(Runnable r) {
1181	>	runWithPermissions(r);
1182		}
1183
1184	<	public class ShortRunnable implements Runnable {
1185	<	public void run() {
1186	<	try {
1187	<	Thread.sleep(SHORT_DELAY_MS);
1184	>	/**
1185	>	* A security policy where new permissions can be dynamically added
1186	>	* or all cleared.
1187	>	*/
1188	>	public static class AdjustablePolicy extends java.security.Policy {
1189	>	Permissions perms = new Permissions();
1190	>	AdjustablePolicy(Permission... permissions) {
1191	>	for (Permission permission : permissions)
1192	>	perms.add(permission);
1193	>	}
1194	>	void addPermission(Permission perm) { perms.add(perm); }
1195	>	void clearPermissions() { perms = new Permissions(); }
1196	>	public PermissionCollection getPermissions(CodeSource cs) {
1197	>	return perms;
1198	>	}
1199	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1200	>	return perms;
1201	>	}
1202	>	public boolean implies(ProtectionDomain pd, Permission p) {
1203	>	return perms.implies(p);
1204	>	}
1205	>	public void refresh() {}
1206	>	public String toString() {
1207	>	List<Permission> ps = new ArrayList<Permission>();
1208	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1209	>	ps.add(e.nextElement());
1210	>	return "AdjustablePolicy with permissions " + ps;
1211	>	}
1212	>	}
1213	>
1214	>	/**
1215	>	* Returns a policy containing all the permissions we ever need.
1216	>	*/
1217	>	public static Policy permissivePolicy() {
1218	>	return new AdjustablePolicy
1219	>	// Permissions j.u.c. needs directly
1220	>	(new RuntimePermission("modifyThread"),
1221	>	new RuntimePermission("getClassLoader"),
1222	>	new RuntimePermission("setContextClassLoader"),
1223	>	// Permissions needed to change permissions!
1224	>	new SecurityPermission("getPolicy"),
1225	>	new SecurityPermission("setPolicy"),
1226	>	new RuntimePermission("setSecurityManager"),
1227	>	// Permissions needed by the junit test harness
1228	>	new RuntimePermission("accessDeclaredMembers"),
1229	>	new PropertyPermission("*", "read"),
1230	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1231	>	}
1232	>
1233	>	/**
1234	>	* Sleeps until the given time has elapsed.
1235	>	* Throws AssertionFailedError if interrupted.
1236	>	*/
1237	>	void sleep(long millis) {
1238	>	try {
1239	>	delay(millis);
1240	>	} catch (InterruptedException fail) {
1241	>	AssertionFailedError afe =
1242	>	new AssertionFailedError("Unexpected InterruptedException");
1243	>	afe.initCause(fail);
1244	>	throw afe;
1245	>	}
1246	>	}
1247	>
1248	>	/**
1249	>	* Spin-waits up to the specified number of milliseconds for the given
1250	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1251	>	*/
1252	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1253	>	long startTime = System.nanoTime();
1254	>	for (;;) {
1255	>	Thread.State s = thread.getState();
1256	>	if (s == Thread.State.BLOCKED ||
1257	>	s == Thread.State.WAITING ||
1258	>	s == Thread.State.TIMED_WAITING)
1259	>	return;
1260	>	else if (s == Thread.State.TERMINATED)
1261	>	fail("Unexpected thread termination");
1262	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1263	>	threadAssertTrue(thread.isAlive());
1264	>	return;
1265		}
1266	<	catch(Exception e) {
1267	<	threadUnexpectedException();
1266	>	Thread.yield();
1267	>	}
1268	>	}
1269	>
1270	>	/**
1271	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1272	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1273	>	*/
1274	>	void waitForThreadToEnterWaitState(Thread thread) {
1275	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1276	>	}
1277	>
1278	>	/**
1279	>	* Returns the number of milliseconds since time given by
1280	>	* startNanoTime, which must have been previously returned from a
1281	>	* call to {@link System#nanoTime()}.
1282	>	*/
1283	>	static long millisElapsedSince(long startNanoTime) {
1284	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1285	>	}
1286	>
1287	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1288	>	//         long startTime = System.nanoTime();
1289	>	//         try {
1290	>	//             r.run();
1291	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1292	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1293	>	//             throw new AssertionFailedError("did not return promptly");
1294	>	//     }
1295	>
1296	>	//     void assertTerminatesPromptly(Runnable r) {
1297	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1298	>	//     }
1299	>
1300	>	/**
1301	>	* Checks that timed f.get() returns the expected value, and does not
1302	>	* wait for the timeout to elapse before returning.
1303	>	*/
1304	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1305	>	long startTime = System.nanoTime();
1306	>	try {
1307	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1308	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1309	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1310	>	throw new AssertionFailedError("timed get did not return promptly");
1311	>	}
1312	>
1313	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1314	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1315	>	}
1316	>
1317	>	/**
1318	>	* Returns a new started daemon Thread running the given runnable.
1319	>	*/
1320	>	Thread newStartedThread(Runnable runnable) {
1321	>	Thread t = new Thread(runnable);
1322	>	t.setDaemon(true);
1323	>	t.start();
1324	>	return t;
1325	>	}
1326	>
1327	>	/**
1328	>	* Waits for the specified time (in milliseconds) for the thread
1329	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1330	>	* the thread (in the hope that it may terminate later) and fails.
1331	>	*/
1332	>	void awaitTermination(Thread t, long timeoutMillis) {
1333	>	try {
1334	>	t.join(timeoutMillis);
1335	>	} catch (InterruptedException fail) {
1336	>	threadUnexpectedException(fail);
1337	>	} finally {
1338	>	if (t.getState() != Thread.State.TERMINATED) {
1339	>	t.interrupt();
1340	>	threadFail("timed out waiting for thread to terminate");
1341		}
1342		}
1343		}
1344
1345	<	public class ShortInterruptedRunnable implements Runnable {
1346	<	public void run() {
1345	>	/**
1346	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1347	>	* terminate (using {@link Thread#join(long)}), else interrupts
1348	>	* the thread (in the hope that it may terminate later) and fails.
1349	>	*/
1350	>	void awaitTermination(Thread t) {
1351	>	awaitTermination(t, LONG_DELAY_MS);
1352	>	}
1353	>
1354	>	// Some convenient Runnable classes
1355	>
1356	>	public abstract class CheckedRunnable implements Runnable {
1357	>	protected abstract void realRun() throws Throwable;
1358	>
1359	>	public final void run() {
1360		try {
1361	<	Thread.sleep(SHORT_DELAY_MS);
1362	<	threadShouldThrow();
1361	>	realRun();
1362	>	} catch (Throwable fail) {
1363	>	threadUnexpectedException(fail);
1364		}
1365	<	catch(InterruptedException success) {
1365	>	}
1366	>	}
1367	>
1368	>	public abstract class RunnableShouldThrow implements Runnable {
1369	>	protected abstract void realRun() throws Throwable;
1370	>
1371	>	final Class<?> exceptionClass;
1372	>
1373	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1374	>	this.exceptionClass = exceptionClass;
1375	>	}
1376	>
1377	>	public final void run() {
1378	>	try {
1379	>	realRun();
1380	>	threadShouldThrow(exceptionClass.getSimpleName());
1381	>	} catch (Throwable t) {
1382	>	if (! exceptionClass.isInstance(t))
1383	>	threadUnexpectedException(t);
1384		}
1385		}
1386		}
1387
1388	<	public class SmallRunnable implements Runnable {
1389	<	public void run() {
1388	>	public abstract class ThreadShouldThrow extends Thread {
1389	>	protected abstract void realRun() throws Throwable;
1390	>
1391	>	final Class<?> exceptionClass;
1392	>
1393	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1394	>	this.exceptionClass = exceptionClass;
1395	>	}
1396	>
1397	>	public final void run() {
1398		try {
1399	<	Thread.sleep(SMALL_DELAY_MS);
1399	>	realRun();
1400	>	threadShouldThrow(exceptionClass.getSimpleName());
1401	>	} catch (Throwable t) {
1402	>	if (! exceptionClass.isInstance(t))
1403	>	threadUnexpectedException(t);
1404		}
1405	<	catch(Exception e) {
1406	<	threadUnexpectedException();
1405	>	}
1406	>	}
1407	>
1408	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1409	>	protected abstract void realRun() throws Throwable;
1410	>
1411	>	public final void run() {
1412	>	try {
1413	>	realRun();
1414	>	threadShouldThrow("InterruptedException");
1415	>	} catch (InterruptedException success) {
1416	>	threadAssertFalse(Thread.interrupted());
1417	>	} catch (Throwable fail) {
1418	>	threadUnexpectedException(fail);
1419		}
1420		}
1421		}
1422
1423	<	public class SmallCallable implements Callable {
1424	<	public Object call() {
1423	>	public abstract class CheckedCallable<T> implements Callable<T> {
1424	>	protected abstract T realCall() throws Throwable;
1425	>
1426	>	public final T call() {
1427		try {
1428	<	Thread.sleep(SMALL_DELAY_MS);
1428	>	return realCall();
1429	>	} catch (Throwable fail) {
1430	>	threadUnexpectedException(fail);
1431	>	return null;
1432		}
1433	<	catch(Exception e) {
1434	<	threadUnexpectedException();
1433	>	}
1434	>	}
1435	>
1436	>	public abstract class CheckedInterruptedCallable<T>
1437	>	implements Callable<T> {
1438	>	protected abstract T realCall() throws Throwable;
1439	>
1440	>	public final T call() {
1441	>	try {
1442	>	T result = realCall();
1443	>	threadShouldThrow("InterruptedException");
1444	>	return result;
1445	>	} catch (InterruptedException success) {
1446	>	threadAssertFalse(Thread.interrupted());
1447	>	} catch (Throwable fail) {
1448	>	threadUnexpectedException(fail);
1449		}
1450	+	return null;
1451	+	}
1452	+	}
1453	+
1454	+	public static class NoOpRunnable implements Runnable {
1455	+	public void run() {}
1456	+	}
1457	+
1458	+	public static class NoOpCallable implements Callable {
1459	+	public Object call() { return Boolean.TRUE; }
1460	+	}
1461	+
1462	+	public static final String TEST_STRING = "a test string";
1463	+
1464	+	public static class StringTask implements Callable<String> {
1465	+	final String value;
1466	+	public StringTask() { this(TEST_STRING); }
1467	+	public StringTask(String value) { this.value = value; }
1468	+	public String call() { return value; }
1469	+	}
1470	+
1471	+	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1472	+	return new CheckedCallable<String>() {
1473	+	protected String realCall() {
1474	+	try {
1475	+	latch.await();
1476	+	} catch (InterruptedException quittingTime) {}
1477	+	return TEST_STRING;
1478	+	}};
1479	+	}
1480	+
1481	+	public Runnable countDowner(final CountDownLatch latch) {
1482	+	return new CheckedRunnable() {
1483	+	public void realRun() throws InterruptedException {
1484	+	latch.countDown();
1485	+	}};
1486	+	}
1487	+
1488	+	class LatchAwaiter extends CheckedRunnable {
1489	+	static final int NEW = 0;
1490	+	static final int RUNNING = 1;
1491	+	static final int DONE = 2;
1492	+	final CountDownLatch latch;
1493	+	int state = NEW;
1494	+	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1495	+	public void realRun() throws InterruptedException {
1496	+	state = 1;
1497	+	await(latch);
1498	+	state = 2;
1499	+	}
1500	+	}
1501	+
1502	+	public LatchAwaiter awaiter(CountDownLatch latch) {
1503	+	return new LatchAwaiter(latch);
1504	+	}
1505	+
1506	+	public void await(CountDownLatch latch, long timeoutMillis) {
1507	+	try {
1508	+	if (!latch.await(timeoutMillis, MILLISECONDS))
1509	+	fail("timed out waiting for CountDownLatch for "
1510	+	+ (timeoutMillis/1000) + " sec");
1511	+	} catch (Throwable fail) {
1512	+	threadUnexpectedException(fail);
1513	+	}
1514	+	}
1515	+
1516	+	public void await(CountDownLatch latch) {
1517	+	await(latch, LONG_DELAY_MS);
1518	+	}
1519	+
1520	+	public void await(Semaphore semaphore) {
1521	+	try {
1522	+	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1523	+	fail("timed out waiting for Semaphore for "
1524	+	+ (LONG_DELAY_MS/1000) + " sec");
1525	+	} catch (Throwable fail) {
1526	+	threadUnexpectedException(fail);
1527	+	}
1528	+	}
1529	+
1530	+	//     /**
1531	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1532	+	//      */
1533	+	//     public void await(AtomicBoolean flag) {
1534	+	//         await(flag, LONG_DELAY_MS);
1535	+	//     }
1536	+
1537	+	//     /**
1538	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1539	+	//      */
1540	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1541	+	//         long startTime = System.nanoTime();
1542	+	//         while (!flag.get()) {
1543	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1544	+	//                 throw new AssertionFailedError("timed out");
1545	+	//             Thread.yield();
1546	+	//         }
1547	+	//     }
1548	+
1549	+	public static class NPETask implements Callable<String> {
1550	+	public String call() { throw new NullPointerException(); }
1551	+	}
1552	+
1553	+	public static class CallableOne implements Callable<Integer> {
1554	+	public Integer call() { return one; }
1555	+	}
1556	+
1557	+	public class ShortRunnable extends CheckedRunnable {
1558	+	protected void realRun() throws Throwable {
1559	+	delay(SHORT_DELAY_MS);
1560	+	}
1561	+	}
1562	+
1563	+	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1564	+	protected void realRun() throws InterruptedException {
1565	+	delay(SHORT_DELAY_MS);
1566	+	}
1567	+	}
1568	+
1569	+	public class SmallRunnable extends CheckedRunnable {
1570	+	protected void realRun() throws Throwable {
1571	+	delay(SMALL_DELAY_MS);
1572	+	}
1573	+	}
1574	+
1575	+	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1576	+	protected void realRun() {
1577	+	try {
1578	+	delay(SMALL_DELAY_MS);
1579	+	} catch (InterruptedException ok) {}
1580	+	}
1581	+	}
1582	+
1583	+	public class SmallCallable extends CheckedCallable {
1584	+	protected Object realCall() throws InterruptedException {
1585	+	delay(SMALL_DELAY_MS);
1586		return Boolean.TRUE;
1587		}
1588		}
1589
1590	<	public class SmallInterruptedRunnable implements Runnable {
1590	>	public class MediumRunnable extends CheckedRunnable {
1591	>	protected void realRun() throws Throwable {
1592	>	delay(MEDIUM_DELAY_MS);
1593	>	}
1594	>	}
1595	>
1596	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1597	>	protected void realRun() throws InterruptedException {
1598	>	delay(MEDIUM_DELAY_MS);
1599	>	}
1600	>	}
1601	>
1602	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1603	>	return new CheckedRunnable() {
1604	>	protected void realRun() {
1605	>	try {
1606	>	delay(timeoutMillis);
1607	>	} catch (InterruptedException ok) {}
1608	>	}};
1609	>	}
1610	>
1611	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1612	>	protected void realRun() {
1613	>	try {
1614	>	delay(MEDIUM_DELAY_MS);
1615	>	} catch (InterruptedException ok) {}
1616	>	}
1617	>	}
1618	>
1619	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1620	>	protected void realRun() {
1621	>	try {
1622	>	delay(LONG_DELAY_MS);
1623	>	} catch (InterruptedException ok) {}
1624	>	}
1625	>	}
1626	>
1627	>	/**
1628	>	* For use as ThreadFactory in constructors
1629	>	*/
1630	>	public static class SimpleThreadFactory implements ThreadFactory {
1631	>	public Thread newThread(Runnable r) {
1632	>	return new Thread(r);
1633	>	}
1634	>	}
1635	>
1636	>	public interface TrackedRunnable extends Runnable {
1637	>	boolean isDone();
1638	>	}
1639	>
1640	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1641	>	return new TrackedRunnable() {
1642	>	private volatile boolean done = false;
1643	>	public boolean isDone() { return done; }
1644	>	public void run() {
1645	>	try {
1646	>	delay(timeoutMillis);
1647	>	done = true;
1648	>	} catch (InterruptedException ok) {}
1649	>	}
1650	>	};
1651	>	}
1652	>
1653	>	public static class TrackedShortRunnable implements Runnable {
1654	>	public volatile boolean done = false;
1655		public void run() {
1656		try {
1657	<	Thread.sleep(SMALL_DELAY_MS);
1658	<	threadShouldThrow();
1659	<	}
256	<	catch(InterruptedException success) {
257	<	}
1657	>	delay(SHORT_DELAY_MS);
1658	>	done = true;
1659	>	} catch (InterruptedException ok) {}
1660		}
1661		}
1662
1663	+	public static class TrackedSmallRunnable implements Runnable {
1664	+	public volatile boolean done = false;
1665	+	public void run() {
1666	+	try {
1667	+	delay(SMALL_DELAY_MS);
1668	+	done = true;
1669	+	} catch (InterruptedException ok) {}
1670	+	}
1671	+	}
1672
1673	<	public class MediumRunnable implements Runnable {
1673	>	public static class TrackedMediumRunnable implements Runnable {
1674	>	public volatile boolean done = false;
1675		public void run() {
1676		try {
1677	<	Thread.sleep(MEDIUM_DELAY_MS);
1678	<	}
1679	<	catch(Exception e) {
268	<	threadUnexpectedException();
269	<	}
1677	>	delay(MEDIUM_DELAY_MS);
1678	>	done = true;
1679	>	} catch (InterruptedException ok) {}
1680		}
1681		}
1682
1683	<	public class MediumInterruptedRunnable implements Runnable {
1683	>	public static class TrackedLongRunnable implements Runnable {
1684	>	public volatile boolean done = false;
1685		public void run() {
1686		try {
1687	<	Thread.sleep(MEDIUM_DELAY_MS);
1688	<	threadShouldThrow();
1687	>	delay(LONG_DELAY_MS);
1688	>	done = true;
1689	>	} catch (InterruptedException ok) {}
1690	>	}
1691	>	}
1692	>
1693	>	public static class TrackedNoOpRunnable implements Runnable {
1694	>	public volatile boolean done = false;
1695	>	public void run() {
1696	>	done = true;
1697	>	}
1698	>	}
1699	>
1700	>	public static class TrackedCallable implements Callable {
1701	>	public volatile boolean done = false;
1702	>	public Object call() {
1703	>	try {
1704	>	delay(SMALL_DELAY_MS);
1705	>	done = true;
1706	>	} catch (InterruptedException ok) {}
1707	>	return Boolean.TRUE;
1708	>	}
1709	>	}
1710	>
1711	>	/**
1712	>	* Analog of CheckedRunnable for RecursiveAction
1713	>	*/
1714	>	public abstract class CheckedRecursiveAction extends RecursiveAction {
1715	>	protected abstract void realCompute() throws Throwable;
1716	>
1717	>	@Override protected final void compute() {
1718	>	try {
1719	>	realCompute();
1720	>	} catch (Throwable fail) {
1721	>	threadUnexpectedException(fail);
1722		}
1723	<	catch(InterruptedException success) {
1723	>	}
1724	>	}
1725	>
1726	>	/**
1727	>	* Analog of CheckedCallable for RecursiveTask
1728	>	*/
1729	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1730	>	protected abstract T realCompute() throws Throwable;
1731	>
1732	>	@Override protected final T compute() {
1733	>	try {
1734	>	return realCompute();
1735	>	} catch (Throwable fail) {
1736	>	threadUnexpectedException(fail);
1737	>	return null;
1738		}
1739		}
1740		}
1741
1742	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1743	<	public void run() {
1742	>	/**
1743	>	* For use as RejectedExecutionHandler in constructors
1744	>	*/
1745	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1746	>	public void rejectedExecution(Runnable r,
1747	>	ThreadPoolExecutor executor) {}
1748	>	}
1749	>
1750	>	/**
1751	>	* A CyclicBarrier that uses timed await and fails with
1752	>	* AssertionFailedErrors instead of throwing checked exceptions.
1753	>	*/
1754	>	public class CheckedBarrier extends CyclicBarrier {
1755	>	public CheckedBarrier(int parties) { super(parties); }
1756	>
1757	>	public int await() {
1758		try {
1759	<	Thread.sleep(MEDIUM_DELAY_MS);
1759	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1760	>	} catch (TimeoutException timedOut) {
1761	>	throw new AssertionFailedError("timed out");
1762	>	} catch (Exception fail) {
1763	>	AssertionFailedError afe =
1764	>	new AssertionFailedError("Unexpected exception: " + fail);
1765	>	afe.initCause(fail);
1766	>	throw afe;
1767		}
1768	<	catch(InterruptedException success) {
1768	>	}
1769	>	}
1770	>
1771	>	void checkEmpty(BlockingQueue q) {
1772	>	try {
1773	>	assertTrue(q.isEmpty());
1774	>	assertEquals(0, q.size());
1775	>	assertNull(q.peek());
1776	>	assertNull(q.poll());
1777	>	assertNull(q.poll(0, MILLISECONDS));
1778	>	assertEquals(q.toString(), "[]");
1779	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1780	>	assertFalse(q.iterator().hasNext());
1781	>	try {
1782	>	q.element();
1783	>	shouldThrow();
1784	>	} catch (NoSuchElementException success) {}
1785	>	try {
1786	>	q.iterator().next();
1787	>	shouldThrow();
1788	>	} catch (NoSuchElementException success) {}
1789	>	try {
1790	>	q.remove();
1791	>	shouldThrow();
1792	>	} catch (NoSuchElementException success) {}
1793	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1794	>	}
1795	>
1796	>	void assertSerialEquals(Object x, Object y) {
1797	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1798	>	}
1799	>
1800	>	void assertNotSerialEquals(Object x, Object y) {
1801	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1802	>	}
1803	>
1804	>	byte[] serialBytes(Object o) {
1805	>	try {
1806	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1807	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1808	>	oos.writeObject(o);
1809	>	oos.flush();
1810	>	oos.close();
1811	>	return bos.toByteArray();
1812	>	} catch (Throwable fail) {
1813	>	threadUnexpectedException(fail);
1814	>	return new byte[0];
1815	>	}
1816	>	}
1817	>
1818	>	@SuppressWarnings("unchecked")
1819	>	<T> T serialClone(T o) {
1820	>	try {
1821	>	ObjectInputStream ois = new ObjectInputStream
1822	>	(new ByteArrayInputStream(serialBytes(o)));
1823	>	T clone = (T) ois.readObject();
1824	>	assertSame(o.getClass(), clone.getClass());
1825	>	return clone;
1826	>	} catch (Throwable fail) {
1827	>	threadUnexpectedException(fail);
1828	>	return null;
1829	>	}
1830	>	}
1831	>
1832	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1833	>	Runnable... throwingActions) {
1834	>	for (Runnable throwingAction : throwingActions) {
1835	>	boolean threw = false;
1836	>	try { throwingAction.run(); }
1837	>	catch (Throwable t) {
1838	>	threw = true;
1839	>	if (!expectedExceptionClass.isInstance(t)) {
1840	>	AssertionFailedError afe =
1841	>	new AssertionFailedError
1842	>	("Expected " + expectedExceptionClass.getName() +
1843	>	", got " + t.getClass().getName());
1844	>	afe.initCause(t);
1845	>	threadUnexpectedException(afe);
1846	>	}
1847		}
1848	+	if (!threw)
1849	+	shouldThrow(expectedExceptionClass.getName());
1850		}
1851		}
1852	<
1852	>
1853	>	public void assertIteratorExhausted(Iterator<?> it) {
1854	>	try {
1855	>	it.next();
1856	>	shouldThrow();
1857	>	} catch (NoSuchElementException success) {}
1858	>	assertFalse(it.hasNext());
1859	>	}
1860	>
1861	>	public <T> Callable<T> callableThrowing(final Exception ex) {
1862	>	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1863	>	}
1864	>
1865	>	public Runnable runnableThrowing(final RuntimeException ex) {
1866	>	return new Runnable() { public void run() { throw ex; }};
1867	>	}
1868	>
1869	>	/** A reusable thread pool to be shared by tests. */
1870	>	static final ExecutorService cachedThreadPool =
1871	>	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1872	>	1000L, MILLISECONDS,
1873	>	new SynchronousQueue<Runnable>());
1874	>
1875		}

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