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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.4 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.204 by jsr166, Sat Oct 15 18:51:12 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.Collections;
45	+	import java.util.Date;
46	+	import java.util.Enumeration;
47	+	import java.util.Iterator;
48	+	import java.util.List;
49	+	import java.util.NoSuchElementException;
50	+	import java.util.PropertyPermission;
51	+	import java.util.concurrent.BlockingQueue;
52	+	import java.util.concurrent.Callable;
53	+	import java.util.concurrent.CountDownLatch;
54	+	import java.util.concurrent.CyclicBarrier;
55	+	import java.util.concurrent.ExecutionException;
56	+	import java.util.concurrent.Executors;
57	+	import java.util.concurrent.ExecutorService;
58	+	import java.util.concurrent.ForkJoinPool;
59	+	import java.util.concurrent.Future;
60	+	import java.util.concurrent.RecursiveAction;
61	+	import java.util.concurrent.RecursiveTask;
62	+	import java.util.concurrent.RejectedExecutionHandler;
63	+	import java.util.concurrent.Semaphore;
64	+	import java.util.concurrent.SynchronousQueue;
65	+	import java.util.concurrent.ThreadFactory;
66	+	import java.util.concurrent.ThreadLocalRandom;
67	+	import java.util.concurrent.ThreadPoolExecutor;
68	+	import java.util.concurrent.TimeoutException;
69	+	import java.util.concurrent.atomic.AtomicBoolean;
70	+	import java.util.concurrent.atomic.AtomicReference;
71	+	import java.util.regex.Matcher;
72	+	import java.util.regex.Pattern;
73	+
74	+	import junit.framework.AssertionFailedError;
75	+	import junit.framework.Test;
76	+	import junit.framework.TestCase;
77	+	import junit.framework.TestResult;
78	+	import junit.framework.TestSuite;
79
80		/**
81	<	* Base class for JSR166 Junit TCK tests.  Defines some constants and
82	<	* utility methods, as well as a simple framework for helping to make
83	<	* sure that assertions failing in generated threads cause the
84	<	* associated test that generated them to itself fail (which JUnit doe
85	<	* not otherwise arrange).  The rules for creating such tests are:
81	>	* Base class for JSR166 Junit TCK tests.  Defines some constants,
82	>	* utility methods and classes, as well as a simple framework for
83	>	* helping to make sure that assertions failing in generated threads
84	>	* cause the associated test that generated them to itself fail (which
85	>	* JUnit does not otherwise arrange).  The rules for creating such
86	>	* tests are:
87		*
88		* <ol>
89		*
90	<	* <li> All assertions in code running in generated threads must use
91	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
92	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
93	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
90	>	* <li>All assertions in code running in generated threads must use
91	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
92	>	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
93	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
94		* particularly recommended) for other code to use these forms too.
95		* Only the most typically used JUnit assertion methods are defined
96	<	* this way, but enough to live with.</li>
96	>	* this way, but enough to live with.
97		*
98	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
99	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
98	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
99	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
100		* them. These methods are used to clear and check for thread
101	<	* assertion failures.</li>
101	>	* assertion failures.
102		*
103	<	* <li>All delays and timeouts must use one of the constants {@link
104	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
105	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
106	<	* discriminatable from zero time, and always allows enough time for
107	<	* the small amounts of computation (creating a thread, calling a few
103	>	* <li>All delays and timeouts must use one of the constants {@code
104	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
105	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
106	>	* discriminable from zero time, and always allows enough time for the
107	>	* small amounts of computation (creating a thread, calling a few
108		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
109		* is always discriminable as larger than SHORT and smaller than
110		* MEDIUM.  And so on. These constants are set to conservative values,
111		* but even so, if there is ever any doubt, they can all be increased
112	<	* in one spot to rerun tests on slower platforms</li>
112	>	* in one spot to rerun tests on slower platforms.
113		*
114	<	* <li> All threads generated must be joined inside each test case
115	<	* method (or <tt>fail</tt> to do so) before returning from the
116	<	* method. The {@link joinPool} method can be used to do this when
117	<	* using Executors.</li>
114	>	* <li>All threads generated must be joined inside each test case
115	>	* method (or {@code fail} to do so) before returning from the
116	>	* method. The {@code joinPool} method can be used to do this when
117	>	* using Executors.
118		*
119		* </ol>
120	+	*
121	+	* <p><b>Other notes</b>
122	+	* <ul>
123	+	*
124	+	* <li>Usually, there is one testcase method per JSR166 method
125	+	* covering "normal" operation, and then as many exception-testing
126	+	* methods as there are exceptions the method can throw. Sometimes
127	+	* there are multiple tests per JSR166 method when the different
128	+	* "normal" behaviors differ significantly. And sometimes testcases
129	+	* cover multiple methods when they cannot be tested in isolation.
130	+	*
131	+	* <li>The documentation style for testcases is to provide as javadoc
132	+	* a simple sentence or two describing the property that the testcase
133	+	* method purports to test. The javadocs do not say anything about how
134	+	* the property is tested. To find out, read the code.
135	+	*
136	+	* <li>These tests are "conformance tests", and do not attempt to
137	+	* test throughput, latency, scalability or other performance factors
138	+	* (see the separate "jtreg" tests for a set intended to check these
139	+	* for the most central aspects of functionality.) So, most tests use
140	+	* the smallest sensible numbers of threads, collection sizes, etc
141	+	* needed to check basic conformance.
142	+	*
143	+	* <li>The test classes currently do not declare inclusion in
144	+	* any particular package to simplify things for people integrating
145	+	* them in TCK test suites.
146	+	*
147	+	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
148	+	* runs all JSR166 unit tests.
149	+	*
150	+	* </ul>
151		*/
152		public class JSR166TestCase extends TestCase {
153	+	private static final boolean useSecurityManager =
154	+	Boolean.getBoolean("jsr166.useSecurityManager");
155	+
156	+	protected static final boolean expensiveTests =
157	+	Boolean.getBoolean("jsr166.expensiveTests");
158	+
159	+	/**
160	+	* If true, also run tests that are not part of the official tck
161	+	* because they test unspecified implementation details.
162	+	*/
163	+	protected static final boolean testImplementationDetails =
164	+	Boolean.getBoolean("jsr166.testImplementationDetails");
165	+
166	+	/**
167	+	* If true, report on stdout all "slow" tests, that is, ones that
168	+	* take more than profileThreshold milliseconds to execute.
169	+	*/
170	+	private static final boolean profileTests =
171	+	Boolean.getBoolean("jsr166.profileTests");
172	+
173	+	/**
174	+	* The number of milliseconds that tests are permitted for
175	+	* execution without being reported, when profileTests is set.
176	+	*/
177	+	private static final long profileThreshold =
178	+	Long.getLong("jsr166.profileThreshold", 100);
179	+
180	+	/**
181	+	* The number of repetitions per test (for tickling rare bugs).
182	+	*/
183	+	private static final int runsPerTest =
184	+	Integer.getInteger("jsr166.runsPerTest", 1);
185	+
186	+	/**
187	+	* The number of repetitions of the test suite (for finding leaks?).
188	+	*/
189	+	private static final int suiteRuns =
190	+	Integer.getInteger("jsr166.suiteRuns", 1);
191	+
192	+	/**
193	+	* Returns the value of the system property, or NaN if not defined.
194	+	*/
195	+	private static float systemPropertyValue(String name) {
196	+	String floatString = System.getProperty(name);
197	+	if (floatString == null)
198	+	return Float.NaN;
199	+	try {
200	+	return Float.parseFloat(floatString);
201	+	} catch (NumberFormatException ex) {
202	+	throw new IllegalArgumentException(
203	+	String.format("Bad float value in system property %s=%s",
204	+	name, floatString));
205	+	}
206	+	}
207	+
208	+	/**
209	+	* The scaling factor to apply to standard delays used in tests.
210	+	* May be initialized from any of:
211	+	* - the "jsr166.delay.factor" system property
212	+	* - the "test.timeout.factor" system property (as used by jtreg)
213	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
214	+	* - hard-coded fuzz factor when using a known slowpoke VM
215	+	*/
216	+	private static final float delayFactor = delayFactor();
217	+
218	+	private static float delayFactor() {
219	+	float x;
220	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
221	+	return x;
222	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
223	+	return x;
224	+	String prop = System.getProperty("java.vm.version");
225	+	if (prop != null && prop.matches(".*debug.*"))
226	+	return 4.0f; // How much slower is fastdebug than product?!
227	+	return 1.0f;
228	+	}
229	+
230	+	public JSR166TestCase() { super(); }
231	+	public JSR166TestCase(String name) { super(name); }
232	+
233	+	/**
234	+	* A filter for tests to run, matching strings of the form
235	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
236	+	* Usefully combined with jsr166.runsPerTest.
237	+	*/
238	+	private static final Pattern methodFilter = methodFilter();
239	+
240	+	private static Pattern methodFilter() {
241	+	String regex = System.getProperty("jsr166.methodFilter");
242	+	return (regex == null) ? null : Pattern.compile(regex);
243	+	}
244	+
245	+	// Instrumentation to debug very rare, but very annoying hung test runs.
246	+	static volatile TestCase currentTestCase;
247	+	// static volatile int currentRun = 0;
248	+	static {
249	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
250	+	// Avoid spurious reports with enormous runsPerTest.
251	+	// A single test case run should never take more than 1 second.
252	+	// But let's cap it at the high end too ...
253	+	final int timeoutMinutes =
254	+	Math.min(15, Math.max(runsPerTest / 60, 1));
255	+	for (TestCase lastTestCase = currentTestCase;;) {
256	+	try { MINUTES.sleep(timeoutMinutes); }
257	+	catch (InterruptedException unexpected) { break; }
258	+	if (lastTestCase == currentTestCase) {
259	+	System.err.printf(
260	+	"Looks like we're stuck running test: %s%n",
261	+	lastTestCase);
262	+	//                     System.err.printf(
263	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
264	+	//                         lastTestCase, currentRun, runsPerTest);
265	+	//                     System.err.println("availableProcessors=" +
266	+	//                         Runtime.getRuntime().availableProcessors());
267	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
268	+	dumpTestThreads();
269	+	// one stack dump is probably enough; more would be spam
270	+	break;
271	+	}
272	+	lastTestCase = currentTestCase;
273	+	}}};
274	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
275	+	thread.setDaemon(true);
276	+	thread.start();
277	+	}
278	+
279	+	//     public static String cpuModel() {
280	+	//         try {
281	+	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
282	+	//                 .matcher(new String(
283	+	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
284	+	//             matcher.find();
285	+	//             return matcher.group(1);
286	+	//         } catch (Exception ex) { return null; }
287	+	//     }
288	+
289	+	public void runBare() throws Throwable {
290	+	currentTestCase = this;
291	+	if (methodFilter == null
292	+	|| methodFilter.matcher(toString()).find())
293	+	super.runBare();
294	+	}
295	+
296	+	protected void runTest() throws Throwable {
297	+	for (int i = 0; i < runsPerTest; i++) {
298	+	// currentRun = i;
299	+	if (profileTests)
300	+	runTestProfiled();
301	+	else
302	+	super.runTest();
303	+	}
304	+	}
305	+
306	+	protected void runTestProfiled() throws Throwable {
307	+	for (int i = 0; i < 2; i++) {
308	+	long startTime = System.nanoTime();
309	+	super.runTest();
310	+	long elapsedMillis = millisElapsedSince(startTime);
311	+	if (elapsedMillis < profileThreshold)
312	+	break;
313	+	// Never report first run of any test; treat it as a
314	+	// warmup run, notably to trigger all needed classloading,
315	+	if (i > 0)
316	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
317	+	}
318	+	}
319	+
320	+	/**
321	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
322	+	*/
323	+	public static void main(String[] args) {
324	+	main(suite(), args);
325	+	}
326	+
327	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
328	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
329	+	long runTime;
330	+	public void startTest(Test test) {}
331	+	protected void printHeader(long runTime) {
332	+	this.runTime = runTime; // defer printing for later
333	+	}
334	+	protected void printFooter(TestResult result) {
335	+	if (result.wasSuccessful()) {
336	+	getWriter().println("OK (" + result.runCount() + " tests)"
337	+	+ "  Time: " + elapsedTimeAsString(runTime));
338	+	} else {
339	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
340	+	super.printFooter(result);
341	+	}
342	+	}
343	+	}
344	+
345	+	/**
346	+	* Returns a TestRunner that doesn't bother with unnecessary
347	+	* fluff, like printing a "." for each test case.
348	+	*/
349	+	static junit.textui.TestRunner newPithyTestRunner() {
350	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
351	+	runner.setPrinter(new PithyResultPrinter(System.out));
352	+	return runner;
353	+	}
354	+
355	+	/**
356	+	* Runs all unit tests in the given test suite.
357	+	* Actual behavior influenced by jsr166.* system properties.
358	+	*/
359	+	static void main(Test suite, String[] args) {
360	+	if (useSecurityManager) {
361	+	System.err.println("Setting a permissive security manager");
362	+	Policy.setPolicy(permissivePolicy());
363	+	System.setSecurityManager(new SecurityManager());
364	+	}
365	+	for (int i = 0; i < suiteRuns; i++) {
366	+	TestResult result = newPithyTestRunner().doRun(suite);
367	+	if (!result.wasSuccessful())
368	+	System.exit(1);
369	+	System.gc();
370	+	System.runFinalization();
371	+	}
372	+	}
373	+
374	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
375	+	TestSuite suite = new TestSuite();
376	+	for (Object suiteOrClass : suiteOrClasses) {
377	+	if (suiteOrClass instanceof TestSuite)
378	+	suite.addTest((TestSuite) suiteOrClass);
379	+	else if (suiteOrClass instanceof Class)
380	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
381	+	else
382	+	throw new ClassCastException("not a test suite or class");
383	+	}
384	+	return suite;
385	+	}
386	+
387	+	public static void addNamedTestClasses(TestSuite suite,
388	+	String... testClassNames) {
389	+	for (String testClassName : testClassNames) {
390	+	try {
391	+	Class<?> testClass = Class.forName(testClassName);
392	+	Method m = testClass.getDeclaredMethod("suite",
393	+	new Class<?>[0]);
394	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
395	+	} catch (Exception e) {
396	+	throw new Error("Missing test class", e);
397	+	}
398	+	}
399	+	}
400	+
401	+	public static final double JAVA_CLASS_VERSION;
402	+	public static final String JAVA_SPECIFICATION_VERSION;
403	+	static {
404	+	try {
405	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
406	+	new java.security.PrivilegedAction<Double>() {
407	+	public Double run() {
408	+	return Double.valueOf(System.getProperty("java.class.version"));}});
409	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
410	+	new java.security.PrivilegedAction<String>() {
411	+	public String run() {
412	+	return System.getProperty("java.specification.version");}});
413	+	} catch (Throwable t) {
414	+	throw new Error(t);
415	+	}
416	+	}
417	+
418	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
419	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
420	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
421	+	public static boolean atLeastJava9() {
422	+	return JAVA_CLASS_VERSION >= 53.0
423	+	// As of 2015-09, java9 still uses 52.0 class file version
424	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
425	+	}
426	+	public static boolean atLeastJava10() {
427	+	return JAVA_CLASS_VERSION >= 54.0
428	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
429	+	}
430	+
431	+	/**
432	+	* Collects all JSR166 unit tests as one suite.
433	+	*/
434	+	public static Test suite() {
435	+	// Java7+ test classes
436	+	TestSuite suite = newTestSuite(
437	+	ForkJoinPoolTest.suite(),
438	+	ForkJoinTaskTest.suite(),
439	+	RecursiveActionTest.suite(),
440	+	RecursiveTaskTest.suite(),
441	+	LinkedTransferQueueTest.suite(),
442	+	PhaserTest.suite(),
443	+	ThreadLocalRandomTest.suite(),
444	+	AbstractExecutorServiceTest.suite(),
445	+	AbstractQueueTest.suite(),
446	+	AbstractQueuedSynchronizerTest.suite(),
447	+	AbstractQueuedLongSynchronizerTest.suite(),
448	+	ArrayBlockingQueueTest.suite(),
449	+	ArrayDequeTest.suite(),
450	+	AtomicBooleanTest.suite(),
451	+	AtomicIntegerArrayTest.suite(),
452	+	AtomicIntegerFieldUpdaterTest.suite(),
453	+	AtomicIntegerTest.suite(),
454	+	AtomicLongArrayTest.suite(),
455	+	AtomicLongFieldUpdaterTest.suite(),
456	+	AtomicLongTest.suite(),
457	+	AtomicMarkableReferenceTest.suite(),
458	+	AtomicReferenceArrayTest.suite(),
459	+	AtomicReferenceFieldUpdaterTest.suite(),
460	+	AtomicReferenceTest.suite(),
461	+	AtomicStampedReferenceTest.suite(),
462	+	ConcurrentHashMapTest.suite(),
463	+	ConcurrentLinkedDequeTest.suite(),
464	+	ConcurrentLinkedQueueTest.suite(),
465	+	ConcurrentSkipListMapTest.suite(),
466	+	ConcurrentSkipListSubMapTest.suite(),
467	+	ConcurrentSkipListSetTest.suite(),
468	+	ConcurrentSkipListSubSetTest.suite(),
469	+	CopyOnWriteArrayListTest.suite(),
470	+	CopyOnWriteArraySetTest.suite(),
471	+	CountDownLatchTest.suite(),
472	+	CountedCompleterTest.suite(),
473	+	CyclicBarrierTest.suite(),
474	+	DelayQueueTest.suite(),
475	+	EntryTest.suite(),
476	+	ExchangerTest.suite(),
477	+	ExecutorsTest.suite(),
478	+	ExecutorCompletionServiceTest.suite(),
479	+	FutureTaskTest.suite(),
480	+	LinkedBlockingDequeTest.suite(),
481	+	LinkedBlockingQueueTest.suite(),
482	+	LinkedListTest.suite(),
483	+	LockSupportTest.suite(),
484	+	PriorityBlockingQueueTest.suite(),
485	+	PriorityQueueTest.suite(),
486	+	ReentrantLockTest.suite(),
487	+	ReentrantReadWriteLockTest.suite(),
488	+	ScheduledExecutorTest.suite(),
489	+	ScheduledExecutorSubclassTest.suite(),
490	+	SemaphoreTest.suite(),
491	+	SynchronousQueueTest.suite(),
492	+	SystemTest.suite(),
493	+	ThreadLocalTest.suite(),
494	+	ThreadPoolExecutorTest.suite(),
495	+	ThreadPoolExecutorSubclassTest.suite(),
496	+	ThreadTest.suite(),
497	+	TimeUnitTest.suite(),
498	+	TreeMapTest.suite(),
499	+	TreeSetTest.suite(),
500	+	TreeSubMapTest.suite(),
501	+	TreeSubSetTest.suite());
502	+
503	+	// Java8+ test classes
504	+	if (atLeastJava8()) {
505	+	String[] java8TestClassNames = {
506	+	"Atomic8Test",
507	+	"CompletableFutureTest",
508	+	"ConcurrentHashMap8Test",
509	+	"CountedCompleter8Test",
510	+	"DoubleAccumulatorTest",
511	+	"DoubleAdderTest",
512	+	"ForkJoinPool8Test",
513	+	"ForkJoinTask8Test",
514	+	"LongAccumulatorTest",
515	+	"LongAdderTest",
516	+	"SplittableRandomTest",
517	+	"StampedLockTest",
518	+	"SubmissionPublisherTest",
519	+	"ThreadLocalRandom8Test",
520	+	"TimeUnit8Test",
521	+	};
522	+	addNamedTestClasses(suite, java8TestClassNames);
523	+	}
524	+
525	+	// Java9+ test classes
526	+	if (atLeastJava9()) {
527	+	String[] java9TestClassNames = {
528	+	"AtomicBoolean9Test",
529	+	"AtomicInteger9Test",
530	+	"AtomicIntegerArray9Test",
531	+	"AtomicLong9Test",
532	+	"AtomicLongArray9Test",
533	+	"AtomicReference9Test",
534	+	"AtomicReferenceArray9Test",
535	+	"ExecutorCompletionService9Test",
536	+	};
537	+	addNamedTestClasses(suite, java9TestClassNames);
538	+	}
539	+
540	+	return suite;
541	+	}
542	+
543	+	/** Returns list of junit-style test method names in given class. */
544	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
545	+	Method[] methods = testClass.getDeclaredMethods();
546	+	ArrayList<String> names = new ArrayList<String>(methods.length);
547	+	for (Method method : methods) {
548	+	if (method.getName().startsWith("test")
549	+	&& Modifier.isPublic(method.getModifiers())
550	+	// method.getParameterCount() requires jdk8+
551	+	&& method.getParameterTypes().length == 0) {
552	+	names.add(method.getName());
553	+	}
554	+	}
555	+	return names;
556	+	}
557	+
558	+	/**
559	+	* Returns junit-style testSuite for the given test class, but
560	+	* parameterized by passing extra data to each test.
561	+	*/
562	+	public static <ExtraData> Test parameterizedTestSuite
563	+	(Class<? extends JSR166TestCase> testClass,
564	+	Class<ExtraData> dataClass,
565	+	ExtraData data) {
566	+	try {
567	+	TestSuite suite = new TestSuite();
568	+	Constructor c =
569	+	testClass.getDeclaredConstructor(dataClass, String.class);
570	+	for (String methodName : testMethodNames(testClass))
571	+	suite.addTest((Test) c.newInstance(data, methodName));
572	+	return suite;
573	+	} catch (Exception e) {
574	+	throw new Error(e);
575	+	}
576	+	}
577	+
578	+	/**
579	+	* Returns junit-style testSuite for the jdk8 extension of the
580	+	* given test class, but parameterized by passing extra data to
581	+	* each test.  Uses reflection to allow compilation in jdk7.
582	+	*/
583	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
584	+	(Class<? extends JSR166TestCase> testClass,
585	+	Class<ExtraData> dataClass,
586	+	ExtraData data) {
587	+	if (atLeastJava8()) {
588	+	String name = testClass.getName();
589	+	String name8 = name.replaceAll("Test$", "8Test");
590	+	if (name.equals(name8)) throw new Error(name);
591	+	try {
592	+	return (Test)
593	+	Class.forName(name8)
594	+	.getMethod("testSuite", new Class[] { dataClass })
595	+	.invoke(null, data);
596	+	} catch (Exception e) {
597	+	throw new Error(e);
598	+	}
599	+	} else {
600	+	return new TestSuite();
601	+	}
602	+	}
603	+
604	+	// Delays for timing-dependent tests, in milliseconds.
605
606		public static long SHORT_DELAY_MS;
607		public static long SMALL_DELAY_MS;
608		public static long MEDIUM_DELAY_MS;
609		public static long LONG_DELAY_MS;
610
61	–
611		/**
612	<	* Return the shortest timed delay. This could
613	<	* be reimplmented to use for example a Property.
614	<	*/
612	>	* Returns the shortest timed delay. This can be scaled up for
613	>	* slow machines using the jsr166.delay.factor system property,
614	>	* or via jtreg's -timeoutFactor: flag.
615	>	* http://openjdk.java.net/jtreg/command-help.html
616	>	*/
617		protected long getShortDelay() {
618	<	return 100;
618	>	return (long) (50 * delayFactor);
619		}
620
70	–
621		/**
622	<	* Set delays as multiples fo SHORT_DELAY.
622	>	* Sets delays as multiples of SHORT_DELAY.
623		*/
624	<	protected  void setDelays() {
624	>	protected void setDelays() {
625		SHORT_DELAY_MS = getShortDelay();
626	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
626	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
627		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
628	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
628	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
629	>	}
630	>
631	>	/**
632	>	* Returns a timeout in milliseconds to be used in tests that
633	>	* verify that operations block or time out.
634	>	*/
635	>	long timeoutMillis() {
636	>	return SHORT_DELAY_MS / 4;
637		}
638
639		/**
640	<	* Flag set true if any threadAssert methods fail
640	>	* Returns a new Date instance representing a time at least
641	>	* delayMillis milliseconds in the future.
642		*/
643	<	protected volatile boolean threadFailed;
643	>	Date delayedDate(long delayMillis) {
644	>	// Add 1 because currentTimeMillis is known to round into the past.
645	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
646	>	}
647
648		/**
649	<	* Initialize test to indicate that no thread assertions have failed
649	>	* The first exception encountered if any threadAssertXXX method fails.
650		*/
651	<	public void setUp() {
651	>	private final AtomicReference<Throwable> threadFailure
652	>	= new AtomicReference<Throwable>(null);
653	>
654	>	/**
655	>	* Records an exception so that it can be rethrown later in the test
656	>	* harness thread, triggering a test case failure.  Only the first
657	>	* failure is recorded; subsequent calls to this method from within
658	>	* the same test have no effect.
659	>	*/
660	>	public void threadRecordFailure(Throwable t) {
661	>	System.err.println(t);
662	>	dumpTestThreads();
663	>	threadFailure.compareAndSet(null, t);
664	>	}
665	>
666	>	public void setUp() {
667		setDelays();
668	<	threadFailed = false;
668	>	}
669	>
670	>	void tearDownFail(String format, Object... args) {
671	>	String msg = toString() + ": " + String.format(format, args);
672	>	System.err.println(msg);
673	>	dumpTestThreads();
674	>	throw new AssertionFailedError(msg);
675		}
676
677		/**
678	<	* Trigger test case failure if any thread assertions have failed
678	>	* Extra checks that get done for all test cases.
679	>	*
680	>	* Triggers test case failure if any thread assertions have failed,
681	>	* by rethrowing, in the test harness thread, any exception recorded
682	>	* earlier by threadRecordFailure.
683	>	*
684	>	* Triggers test case failure if interrupt status is set in the main thread.
685		*/
686	<	public void tearDown() {
687	<	assertFalse(threadFailed);
686	>	public void tearDown() throws Exception {
687	>	Throwable t = threadFailure.getAndSet(null);
688	>	if (t != null) {
689	>	if (t instanceof Error)
690	>	throw (Error) t;
691	>	else if (t instanceof RuntimeException)
692	>	throw (RuntimeException) t;
693	>	else if (t instanceof Exception)
694	>	throw (Exception) t;
695	>	else {
696	>	AssertionFailedError afe =
697	>	new AssertionFailedError(t.toString());
698	>	afe.initCause(t);
699	>	throw afe;
700	>	}
701	>	}
702	>
703	>	if (Thread.interrupted())
704	>	tearDownFail("interrupt status set in main thread");
705	>
706	>	checkForkJoinPoolThreadLeaks();
707	>	}
708	>
709	>	/**
710	>	* Finds missing PoolCleaners
711	>	*/
712	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
713	>	Thread[] survivors = new Thread[7];
714	>	int count = Thread.enumerate(survivors);
715	>	for (int i = 0; i < count; i++) {
716	>	Thread thread = survivors[i];
717	>	String name = thread.getName();
718	>	if (name.startsWith("ForkJoinPool-")) {
719	>	// give thread some time to terminate
720	>	thread.join(LONG_DELAY_MS);
721	>	if (thread.isAlive())
722	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
723	>	thread);
724	>	}
725	>	}
726	>
727	>	if (!ForkJoinPool.commonPool()
728	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
729	>	tearDownFail("ForkJoin common pool thread stuck");
730		}
731
732	+	/**
733	+	* Just like fail(reason), but additionally recording (using
734	+	* threadRecordFailure) any AssertionFailedError thrown, so that
735	+	* the current testcase will fail.
736	+	*/
737		public void threadFail(String reason) {
738	<	threadFailed = true;
739	<	fail(reason);
738	>	try {
739	>	fail(reason);
740	>	} catch (AssertionFailedError t) {
741	>	threadRecordFailure(t);
742	>	throw t;
743	>	}
744		}
745
746	+	/**
747	+	* Just like assertTrue(b), but additionally recording (using
748	+	* threadRecordFailure) any AssertionFailedError thrown, so that
749	+	* the current testcase will fail.
750	+	*/
751		public void threadAssertTrue(boolean b) {
752	<	if (!b) {
108	<	threadFailed = true;
752	>	try {
753		assertTrue(b);
754	+	} catch (AssertionFailedError t) {
755	+	threadRecordFailure(t);
756	+	throw t;
757		}
758		}
759	+
760	+	/**
761	+	* Just like assertFalse(b), but additionally recording (using
762	+	* threadRecordFailure) any AssertionFailedError thrown, so that
763	+	* the current testcase will fail.
764	+	*/
765		public void threadAssertFalse(boolean b) {
766	<	if (b) {
114	<	threadFailed = true;
766	>	try {
767		assertFalse(b);
768	+	} catch (AssertionFailedError t) {
769	+	threadRecordFailure(t);
770	+	throw t;
771		}
772		}
773	+
774	+	/**
775	+	* Just like assertNull(x), but additionally recording (using
776	+	* threadRecordFailure) any AssertionFailedError thrown, so that
777	+	* the current testcase will fail.
778	+	*/
779		public void threadAssertNull(Object x) {
780	<	if (x != null) {
120	<	threadFailed = true;
780	>	try {
781		assertNull(x);
782	+	} catch (AssertionFailedError t) {
783	+	threadRecordFailure(t);
784	+	throw t;
785		}
786		}
787	+
788	+	/**
789	+	* Just like assertEquals(x, y), but additionally recording (using
790	+	* threadRecordFailure) any AssertionFailedError thrown, so that
791	+	* the current testcase will fail.
792	+	*/
793		public void threadAssertEquals(long x, long y) {
794	<	if (x != y) {
126	<	threadFailed = true;
794	>	try {
795		assertEquals(x, y);
796	+	} catch (AssertionFailedError t) {
797	+	threadRecordFailure(t);
798	+	throw t;
799		}
800		}
801	+
802	+	/**
803	+	* Just like assertEquals(x, y), but additionally recording (using
804	+	* threadRecordFailure) any AssertionFailedError thrown, so that
805	+	* the current testcase will fail.
806	+	*/
807		public void threadAssertEquals(Object x, Object y) {
808	<	if (x != y && (x == null || !x.equals(y))) {
132	<	threadFailed = true;
808	>	try {
809		assertEquals(x, y);
810	+	} catch (AssertionFailedError fail) {
811	+	threadRecordFailure(fail);
812	+	throw fail;
813	+	} catch (Throwable fail) {
814	+	threadUnexpectedException(fail);
815	+	}
816	+	}
817	+
818	+	/**
819	+	* Just like assertSame(x, y), but additionally recording (using
820	+	* threadRecordFailure) any AssertionFailedError thrown, so that
821	+	* the current testcase will fail.
822	+	*/
823	+	public void threadAssertSame(Object x, Object y) {
824	+	try {
825	+	assertSame(x, y);
826	+	} catch (AssertionFailedError fail) {
827	+	threadRecordFailure(fail);
828	+	throw fail;
829		}
830		}
831
832	+	/**
833	+	* Calls threadFail with message "should throw exception".
834	+	*/
835		public void threadShouldThrow() {
836	<	threadFailed = true;
837	<	fail("should throw exception");
836	>	threadFail("should throw exception");
837	>	}
838	>
839	>	/**
840	>	* Calls threadFail with message "should throw" + exceptionName.
841	>	*/
842	>	public void threadShouldThrow(String exceptionName) {
843	>	threadFail("should throw " + exceptionName);
844	>	}
845	>
846	>	/**
847	>	* Records the given exception using {@link #threadRecordFailure},
848	>	* then rethrows the exception, wrapping it in an
849	>	* AssertionFailedError if necessary.
850	>	*/
851	>	public void threadUnexpectedException(Throwable t) {
852	>	threadRecordFailure(t);
853	>	t.printStackTrace();
854	>	if (t instanceof RuntimeException)
855	>	throw (RuntimeException) t;
856	>	else if (t instanceof Error)
857	>	throw (Error) t;
858	>	else {
859	>	AssertionFailedError afe =
860	>	new AssertionFailedError("unexpected exception: " + t);
861	>	afe.initCause(t);
862	>	throw afe;
863	>	}
864		}
865
866	<	public void threadUnexpectedException() {
867	<	threadFailed = true;
868	<	fail("Unexpected exception");
866	>	/**
867	>	* Delays, via Thread.sleep, for the given millisecond delay, but
868	>	* if the sleep is shorter than specified, may re-sleep or yield
869	>	* until time elapses.  Ensures that the given time, as measured
870	>	* by System.nanoTime(), has elapsed.
871	>	*/
872	>	static void delay(long millis) throws InterruptedException {
873	>	long nanos = millis * (1000 * 1000);
874	>	final long wakeupTime = System.nanoTime() + nanos;
875	>	do {
876	>	if (millis > 0L)
877	>	Thread.sleep(millis);
878	>	else // too short to sleep
879	>	Thread.yield();
880	>	nanos = wakeupTime - System.nanoTime();
881	>	millis = nanos / (1000 * 1000);
882	>	} while (nanos >= 0L);
883		}
884
885	+	/**
886	+	* Allows use of try-with-resources with per-test thread pools.
887	+	*/
888	+	class PoolCleaner implements AutoCloseable {
889	+	private final ExecutorService pool;
890	+	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
891	+	public void close() { joinPool(pool); }
892	+	}
893
894		/**
895	<	* Wait out termination of a thread pool or fail doing so
895	>	* An extension of PoolCleaner that has an action to release the pool.
896		*/
897	<	public void joinPool(ExecutorService exec) {
897	>	class PoolCleanerWithReleaser extends PoolCleaner {
898	>	private final Runnable releaser;
899	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
900	>	super(pool);
901	>	this.releaser = releaser;
902	>	}
903	>	public void close() {
904	>	try {
905	>	releaser.run();
906	>	} finally {
907	>	super.close();
908	>	}
909	>	}
910	>	}
911	>
912	>	PoolCleaner cleaner(ExecutorService pool) {
913	>	return new PoolCleaner(pool);
914	>	}
915	>
916	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
917	>	return new PoolCleanerWithReleaser(pool, releaser);
918	>	}
919	>
920	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
921	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
922	>	}
923	>
924	>	Runnable releaser(final CountDownLatch latch) {
925	>	return new Runnable() { public void run() {
926	>	do { latch.countDown(); }
927	>	while (latch.getCount() > 0);
928	>	}};
929	>	}
930	>
931	>	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
932	>	return new PoolCleanerWithReleaser(pool, releaser(flag));
933	>	}
934	>
935	>	Runnable releaser(final AtomicBoolean flag) {
936	>	return new Runnable() { public void run() { flag.set(true); }};
937	>	}
938	>
939	>	/**
940	>	* Waits out termination of a thread pool or fails doing so.
941	>	*/
942	>	void joinPool(ExecutorService pool) {
943	>	try {
944	>	pool.shutdown();
945	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
946	>	try {
947	>	threadFail("ExecutorService " + pool +
948	>	" did not terminate in a timely manner");
949	>	} finally {
950	>	// last resort, for the benefit of subsequent tests
951	>	pool.shutdownNow();
952	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
953	>	}
954	>	}
955	>	} catch (SecurityException ok) {
956	>	// Allowed in case test doesn't have privs
957	>	} catch (InterruptedException fail) {
958	>	threadFail("Unexpected InterruptedException");
959	>	}
960	>	}
961	>
962	>	/**
963	>	* Like Runnable, but with the freedom to throw anything.
964	>	* junit folks had the same idea:
965	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
966	>	*/
967	>	interface Action { public void run() throws Throwable; }
968	>
969	>	/**
970	>	* Runs all the given actions in parallel, failing if any fail.
971	>	* Useful for running multiple variants of tests that are
972	>	* necessarily individually slow because they must block.
973	>	*/
974	>	void testInParallel(Action ... actions) {
975	>	ExecutorService pool = Executors.newCachedThreadPool();
976	>	try (PoolCleaner cleaner = cleaner(pool)) {
977	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
978	>	for (final Action action : actions)
979	>	futures.add(pool.submit(new CheckedRunnable() {
980	>	public void realRun() throws Throwable { action.run();}}));
981	>	for (Future<?> future : futures)
982	>	try {
983	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
984	>	} catch (ExecutionException ex) {
985	>	threadUnexpectedException(ex.getCause());
986	>	} catch (Exception ex) {
987	>	threadUnexpectedException(ex);
988	>	}
989	>	}
990	>	}
991	>
992	>	/**
993	>	* A debugging tool to print stack traces of most threads, as jstack does.
994	>	* Uninteresting threads are filtered out.
995	>	*/
996	>	static void dumpTestThreads() {
997	>	SecurityManager sm = System.getSecurityManager();
998	>	if (sm != null) {
999	>	try {
1000	>	System.setSecurityManager(null);
1001	>	} catch (SecurityException giveUp) {
1002	>	return;
1003	>	}
1004	>	}
1005	>
1006	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1007	>	System.err.println("------ stacktrace dump start ------");
1008	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1009	>	final String name = info.getThreadName();
1010	>	String lockName;
1011	>	if ("Signal Dispatcher".equals(name))
1012	>	continue;
1013	>	if ("Reference Handler".equals(name)
1014	>	&& (lockName = info.getLockName()) != null
1015	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1016	>	continue;
1017	>	if ("Finalizer".equals(name)
1018	>	&& (lockName = info.getLockName()) != null
1019	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1020	>	continue;
1021	>	if ("checkForWedgedTest".equals(name))
1022	>	continue;
1023	>	System.err.print(info);
1024	>	}
1025	>	System.err.println("------ stacktrace dump end ------");
1026	>
1027	>	if (sm != null) System.setSecurityManager(sm);
1028	>	}
1029	>
1030	>	/**
1031	>	* Checks that thread does not terminate within the default
1032	>	* millisecond delay of {@code timeoutMillis()}.
1033	>	*/
1034	>	void assertThreadStaysAlive(Thread thread) {
1035	>	assertThreadStaysAlive(thread, timeoutMillis());
1036	>	}
1037	>
1038	>	/**
1039	>	* Checks that thread does not terminate within the given millisecond delay.
1040	>	*/
1041	>	void assertThreadStaysAlive(Thread thread, long millis) {
1042	>	try {
1043	>	// No need to optimize the failing case via Thread.join.
1044	>	delay(millis);
1045	>	assertTrue(thread.isAlive());
1046	>	} catch (InterruptedException fail) {
1047	>	threadFail("Unexpected InterruptedException");
1048	>	}
1049	>	}
1050	>
1051	>	/**
1052	>	* Checks that the threads do not terminate within the default
1053	>	* millisecond delay of {@code timeoutMillis()}.
1054	>	*/
1055	>	void assertThreadsStayAlive(Thread... threads) {
1056	>	assertThreadsStayAlive(timeoutMillis(), threads);
1057	>	}
1058	>
1059	>	/**
1060	>	* Checks that the threads do not terminate within the given millisecond delay.
1061	>	*/
1062	>	void assertThreadsStayAlive(long millis, Thread... threads) {
1063		try {
1064	<	exec.shutdown();
1065	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
1066	<	} catch(InterruptedException ie) {
1067	<	fail("Unexpected exception");
1064	>	// No need to optimize the failing case via Thread.join.
1065	>	delay(millis);
1066	>	for (Thread thread : threads)
1067	>	assertTrue(thread.isAlive());
1068	>	} catch (InterruptedException fail) {
1069	>	threadFail("Unexpected InterruptedException");
1070		}
1071		}
1072
1073	<
1073	>	/**
1074	>	* Checks that future.get times out, with the default timeout of
1075	>	* {@code timeoutMillis()}.
1076	>	*/
1077	>	void assertFutureTimesOut(Future future) {
1078	>	assertFutureTimesOut(future, timeoutMillis());
1079	>	}
1080	>
1081	>	/**
1082	>	* Checks that future.get times out, with the given millisecond timeout.
1083	>	*/
1084	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
1085	>	long startTime = System.nanoTime();
1086	>	try {
1087	>	future.get(timeoutMillis, MILLISECONDS);
1088	>	shouldThrow();
1089	>	} catch (TimeoutException success) {
1090	>	} catch (Exception fail) {
1091	>	threadUnexpectedException(fail);
1092	>	} finally { future.cancel(true); }
1093	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1094	>	}
1095	>
1096	>	/**
1097	>	* Fails with message "should throw exception".
1098	>	*/
1099		public void shouldThrow() {
1100		fail("Should throw exception");
1101		}
1102
1103	<	public void unexpectedException() {
1104	<	fail("Unexpected exception");
1103	>	/**
1104	>	* Fails with message "should throw " + exceptionName.
1105	>	*/
1106	>	public void shouldThrow(String exceptionName) {
1107	>	fail("Should throw " + exceptionName);
1108		}
1109
169	–
1110		/**
1111		* The number of elements to place in collections, arrays, etc.
1112		*/
#	Line 174 | Line 1114 | public class JSR166TestCase extends Test
1114
1115		// Some convenient Integer constants
1116
1117	<	public static final Integer zero = new Integer(0);
1118	<	public static final Integer one = new Integer(1);
1119	<	public static final Integer two = new Integer(2);
1120	<	public static final Integer three  = new Integer(3);
1117	>	public static final Integer zero  = new Integer(0);
1118	>	public static final Integer one   = new Integer(1);
1119	>	public static final Integer two   = new Integer(2);
1120	>	public static final Integer three = new Integer(3);
1121		public static final Integer four  = new Integer(4);
1122		public static final Integer five  = new Integer(5);
1123	<	public static final Integer six = new Integer(6);
1123	>	public static final Integer six   = new Integer(6);
1124		public static final Integer seven = new Integer(7);
1125		public static final Integer eight = new Integer(8);
1126	<	public static final Integer nine = new Integer(9);
1126	>	public static final Integer nine  = new Integer(9);
1127		public static final Integer m1  = new Integer(-1);
1128		public static final Integer m2  = new Integer(-2);
1129		public static final Integer m3  = new Integer(-3);
1130	<	public static final Integer m4 = new Integer(-4);
1131	<	public static final Integer m5 = new Integer(-5);
1130	>	public static final Integer m4  = new Integer(-4);
1131	>	public static final Integer m5  = new Integer(-5);
1132	>	public static final Integer m6  = new Integer(-6);
1133		public static final Integer m10 = new Integer(-10);
1134
1135	+	/**
1136	+	* Runs Runnable r with a security policy that permits precisely
1137	+	* the specified permissions.  If there is no current security
1138	+	* manager, the runnable is run twice, both with and without a
1139	+	* security manager.  We require that any security manager permit
1140	+	* getPolicy/setPolicy.
1141	+	*/
1142	+	public void runWithPermissions(Runnable r, Permission... permissions) {
1143	+	SecurityManager sm = System.getSecurityManager();
1144	+	if (sm == null) {
1145	+	r.run();
1146	+	}
1147	+	runWithSecurityManagerWithPermissions(r, permissions);
1148	+	}
1149
1150	<	// Some convenient Runnable classes
1150	>	/**
1151	>	* Runs Runnable r with a security policy that permits precisely
1152	>	* the specified permissions.  If there is no current security
1153	>	* manager, a temporary one is set for the duration of the
1154	>	* Runnable.  We require that any security manager permit
1155	>	* getPolicy/setPolicy.
1156	>	*/
1157	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1158	>	Permission... permissions) {
1159	>	SecurityManager sm = System.getSecurityManager();
1160	>	if (sm == null) {
1161	>	Policy savedPolicy = Policy.getPolicy();
1162	>	try {
1163	>	Policy.setPolicy(permissivePolicy());
1164	>	System.setSecurityManager(new SecurityManager());
1165	>	runWithSecurityManagerWithPermissions(r, permissions);
1166	>	} finally {
1167	>	System.setSecurityManager(null);
1168	>	Policy.setPolicy(savedPolicy);
1169	>	}
1170	>	} else {
1171	>	Policy savedPolicy = Policy.getPolicy();
1172	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1173	>	Policy.setPolicy(policy);
1174
1175	<	public static class NoOpRunnable implements Runnable {
1176	<	public void run() {}
1175	>	try {
1176	>	r.run();
1177	>	} finally {
1178	>	policy.addPermission(new SecurityPermission("setPolicy"));
1179	>	Policy.setPolicy(savedPolicy);
1180	>	}
1181	>	}
1182		}
1183
1184	<	public static class NoOpCallable implements Callable {
1185	<	public Object call() { return Boolean.TRUE; }
1184	>	/**
1185	>	* Runs a runnable without any permissions.
1186	>	*/
1187	>	public void runWithoutPermissions(Runnable r) {
1188	>	runWithPermissions(r);
1189		}
1190
1191	<	public class ShortRunnable implements Runnable {
1192	<	public void run() {
1193	<	try {
1194	<	Thread.sleep(SHORT_DELAY_MS);
1191	>	/**
1192	>	* A security policy where new permissions can be dynamically added
1193	>	* or all cleared.
1194	>	*/
1195	>	public static class AdjustablePolicy extends java.security.Policy {
1196	>	Permissions perms = new Permissions();
1197	>	AdjustablePolicy(Permission... permissions) {
1198	>	for (Permission permission : permissions)
1199	>	perms.add(permission);
1200	>	}
1201	>	void addPermission(Permission perm) { perms.add(perm); }
1202	>	void clearPermissions() { perms = new Permissions(); }
1203	>	public PermissionCollection getPermissions(CodeSource cs) {
1204	>	return perms;
1205	>	}
1206	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1207	>	return perms;
1208	>	}
1209	>	public boolean implies(ProtectionDomain pd, Permission p) {
1210	>	return perms.implies(p);
1211	>	}
1212	>	public void refresh() {}
1213	>	public String toString() {
1214	>	List<Permission> ps = new ArrayList<Permission>();
1215	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1216	>	ps.add(e.nextElement());
1217	>	return "AdjustablePolicy with permissions " + ps;
1218	>	}
1219	>	}
1220	>
1221	>	/**
1222	>	* Returns a policy containing all the permissions we ever need.
1223	>	*/
1224	>	public static Policy permissivePolicy() {
1225	>	return new AdjustablePolicy
1226	>	// Permissions j.u.c. needs directly
1227	>	(new RuntimePermission("modifyThread"),
1228	>	new RuntimePermission("getClassLoader"),
1229	>	new RuntimePermission("setContextClassLoader"),
1230	>	// Permissions needed to change permissions!
1231	>	new SecurityPermission("getPolicy"),
1232	>	new SecurityPermission("setPolicy"),
1233	>	new RuntimePermission("setSecurityManager"),
1234	>	// Permissions needed by the junit test harness
1235	>	new RuntimePermission("accessDeclaredMembers"),
1236	>	new PropertyPermission("*", "read"),
1237	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1238	>	}
1239	>
1240	>	/**
1241	>	* Sleeps until the given time has elapsed.
1242	>	* Throws AssertionFailedError if interrupted.
1243	>	*/
1244	>	static void sleep(long millis) {
1245	>	try {
1246	>	delay(millis);
1247	>	} catch (InterruptedException fail) {
1248	>	AssertionFailedError afe =
1249	>	new AssertionFailedError("Unexpected InterruptedException");
1250	>	afe.initCause(fail);
1251	>	throw afe;
1252	>	}
1253	>	}
1254	>
1255	>	/**
1256	>	* Spin-waits up to the specified number of milliseconds for the given
1257	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1258	>	*/
1259	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1260	>	long startTime = 0L;
1261	>	for (;;) {
1262	>	Thread.State s = thread.getState();
1263	>	if (s == Thread.State.BLOCKED ||
1264	>	s == Thread.State.WAITING ||
1265	>	s == Thread.State.TIMED_WAITING)
1266	>	return;
1267	>	else if (s == Thread.State.TERMINATED)
1268	>	fail("Unexpected thread termination");
1269	>	else if (startTime == 0L)
1270	>	startTime = System.nanoTime();
1271	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1272	>	threadAssertTrue(thread.isAlive());
1273	>	return;
1274		}
1275	<	catch(Exception e) {
1276	<	threadUnexpectedException();
1275	>	Thread.yield();
1276	>	}
1277	>	}
1278	>
1279	>	/**
1280	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1281	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1282	>	*/
1283	>	void waitForThreadToEnterWaitState(Thread thread) {
1284	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1285	>	}
1286	>
1287	>	/**
1288	>	* Returns the number of milliseconds since time given by
1289	>	* startNanoTime, which must have been previously returned from a
1290	>	* call to {@link System#nanoTime()}.
1291	>	*/
1292	>	static long millisElapsedSince(long startNanoTime) {
1293	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1294	>	}
1295	>
1296	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1297	>	//         long startTime = System.nanoTime();
1298	>	//         try {
1299	>	//             r.run();
1300	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1301	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1302	>	//             throw new AssertionFailedError("did not return promptly");
1303	>	//     }
1304	>
1305	>	//     void assertTerminatesPromptly(Runnable r) {
1306	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1307	>	//     }
1308	>
1309	>	/**
1310	>	* Checks that timed f.get() returns the expected value, and does not
1311	>	* wait for the timeout to elapse before returning.
1312	>	*/
1313	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1314	>	long startTime = System.nanoTime();
1315	>	try {
1316	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1317	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1318	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1319	>	throw new AssertionFailedError("timed get did not return promptly");
1320	>	}
1321	>
1322	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1323	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1324	>	}
1325	>
1326	>	/**
1327	>	* Returns a new started daemon Thread running the given runnable.
1328	>	*/
1329	>	Thread newStartedThread(Runnable runnable) {
1330	>	Thread t = new Thread(runnable);
1331	>	t.setDaemon(true);
1332	>	t.start();
1333	>	return t;
1334	>	}
1335	>
1336	>	/**
1337	>	* Waits for the specified time (in milliseconds) for the thread
1338	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1339	>	* the thread (in the hope that it may terminate later) and fails.
1340	>	*/
1341	>	void awaitTermination(Thread t, long timeoutMillis) {
1342	>	try {
1343	>	t.join(timeoutMillis);
1344	>	} catch (InterruptedException fail) {
1345	>	threadUnexpectedException(fail);
1346	>	} finally {
1347	>	if (t.getState() != Thread.State.TERMINATED) {
1348	>	t.interrupt();
1349	>	threadFail("timed out waiting for thread to terminate");
1350		}
1351		}
1352		}
1353
1354	<	public class ShortInterruptedRunnable implements Runnable {
1355	<	public void run() {
1354	>	/**
1355	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1356	>	* terminate (using {@link Thread#join(long)}), else interrupts
1357	>	* the thread (in the hope that it may terminate later) and fails.
1358	>	*/
1359	>	void awaitTermination(Thread t) {
1360	>	awaitTermination(t, LONG_DELAY_MS);
1361	>	}
1362	>
1363	>	// Some convenient Runnable classes
1364	>
1365	>	public abstract class CheckedRunnable implements Runnable {
1366	>	protected abstract void realRun() throws Throwable;
1367	>
1368	>	public final void run() {
1369		try {
1370	<	Thread.sleep(SHORT_DELAY_MS);
1371	<	threadShouldThrow();
1370	>	realRun();
1371	>	} catch (Throwable fail) {
1372	>	threadUnexpectedException(fail);
1373		}
1374	<	catch(InterruptedException success) {
1374	>	}
1375	>	}
1376	>
1377	>	public abstract class RunnableShouldThrow implements Runnable {
1378	>	protected abstract void realRun() throws Throwable;
1379	>
1380	>	final Class<?> exceptionClass;
1381	>
1382	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1383	>	this.exceptionClass = exceptionClass;
1384	>	}
1385	>
1386	>	public final void run() {
1387	>	try {
1388	>	realRun();
1389	>	threadShouldThrow(exceptionClass.getSimpleName());
1390	>	} catch (Throwable t) {
1391	>	if (! exceptionClass.isInstance(t))
1392	>	threadUnexpectedException(t);
1393		}
1394		}
1395		}
1396
1397	<	public class SmallRunnable implements Runnable {
1398	<	public void run() {
1397	>	public abstract class ThreadShouldThrow extends Thread {
1398	>	protected abstract void realRun() throws Throwable;
1399	>
1400	>	final Class<?> exceptionClass;
1401	>
1402	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1403	>	this.exceptionClass = exceptionClass;
1404	>	}
1405	>
1406	>	public final void run() {
1407		try {
1408	<	Thread.sleep(SMALL_DELAY_MS);
1408	>	realRun();
1409	>	threadShouldThrow(exceptionClass.getSimpleName());
1410	>	} catch (Throwable t) {
1411	>	if (! exceptionClass.isInstance(t))
1412	>	threadUnexpectedException(t);
1413		}
1414	<	catch(Exception e) {
1415	<	threadUnexpectedException();
1414	>	}
1415	>	}
1416	>
1417	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1418	>	protected abstract void realRun() throws Throwable;
1419	>
1420	>	public final void run() {
1421	>	try {
1422	>	realRun();
1423	>	threadShouldThrow("InterruptedException");
1424	>	} catch (InterruptedException success) {
1425	>	threadAssertFalse(Thread.interrupted());
1426	>	} catch (Throwable fail) {
1427	>	threadUnexpectedException(fail);
1428		}
1429		}
1430		}
1431
1432	<	public class SmallCallable implements Callable {
1433	<	public Object call() {
1432	>	public abstract class CheckedCallable<T> implements Callable<T> {
1433	>	protected abstract T realCall() throws Throwable;
1434	>
1435	>	public final T call() {
1436		try {
1437	<	Thread.sleep(SMALL_DELAY_MS);
1437	>	return realCall();
1438	>	} catch (Throwable fail) {
1439	>	threadUnexpectedException(fail);
1440	>	return null;
1441		}
1442	<	catch(Exception e) {
1443	<	threadUnexpectedException();
1442	>	}
1443	>	}
1444	>
1445	>	public abstract class CheckedInterruptedCallable<T>
1446	>	implements Callable<T> {
1447	>	protected abstract T realCall() throws Throwable;
1448	>
1449	>	public final T call() {
1450	>	try {
1451	>	T result = realCall();
1452	>	threadShouldThrow("InterruptedException");
1453	>	return result;
1454	>	} catch (InterruptedException success) {
1455	>	threadAssertFalse(Thread.interrupted());
1456	>	} catch (Throwable fail) {
1457	>	threadUnexpectedException(fail);
1458		}
1459	+	return null;
1460	+	}
1461	+	}
1462	+
1463	+	public static class NoOpRunnable implements Runnable {
1464	+	public void run() {}
1465	+	}
1466	+
1467	+	public static class NoOpCallable implements Callable {
1468	+	public Object call() { return Boolean.TRUE; }
1469	+	}
1470	+
1471	+	public static final String TEST_STRING = "a test string";
1472	+
1473	+	public static class StringTask implements Callable<String> {
1474	+	final String value;
1475	+	public StringTask() { this(TEST_STRING); }
1476	+	public StringTask(String value) { this.value = value; }
1477	+	public String call() { return value; }
1478	+	}
1479	+
1480	+	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1481	+	return new CheckedCallable<String>() {
1482	+	protected String realCall() {
1483	+	try {
1484	+	latch.await();
1485	+	} catch (InterruptedException quittingTime) {}
1486	+	return TEST_STRING;
1487	+	}};
1488	+	}
1489	+
1490	+	public Runnable countDowner(final CountDownLatch latch) {
1491	+	return new CheckedRunnable() {
1492	+	public void realRun() throws InterruptedException {
1493	+	latch.countDown();
1494	+	}};
1495	+	}
1496	+
1497	+	class LatchAwaiter extends CheckedRunnable {
1498	+	static final int NEW = 0;
1499	+	static final int RUNNING = 1;
1500	+	static final int DONE = 2;
1501	+	final CountDownLatch latch;
1502	+	int state = NEW;
1503	+	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1504	+	public void realRun() throws InterruptedException {
1505	+	state = 1;
1506	+	await(latch);
1507	+	state = 2;
1508	+	}
1509	+	}
1510	+
1511	+	public LatchAwaiter awaiter(CountDownLatch latch) {
1512	+	return new LatchAwaiter(latch);
1513	+	}
1514	+
1515	+	public void await(CountDownLatch latch, long timeoutMillis) {
1516	+	try {
1517	+	if (!latch.await(timeoutMillis, MILLISECONDS))
1518	+	fail("timed out waiting for CountDownLatch for "
1519	+	+ (timeoutMillis/1000) + " sec");
1520	+	} catch (Throwable fail) {
1521	+	threadUnexpectedException(fail);
1522	+	}
1523	+	}
1524	+
1525	+	public void await(CountDownLatch latch) {
1526	+	await(latch, LONG_DELAY_MS);
1527	+	}
1528	+
1529	+	public void await(Semaphore semaphore) {
1530	+	try {
1531	+	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1532	+	fail("timed out waiting for Semaphore for "
1533	+	+ (LONG_DELAY_MS/1000) + " sec");
1534	+	} catch (Throwable fail) {
1535	+	threadUnexpectedException(fail);
1536	+	}
1537	+	}
1538	+
1539	+	//     /**
1540	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1541	+	//      */
1542	+	//     public void await(AtomicBoolean flag) {
1543	+	//         await(flag, LONG_DELAY_MS);
1544	+	//     }
1545	+
1546	+	//     /**
1547	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1548	+	//      */
1549	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1550	+	//         long startTime = System.nanoTime();
1551	+	//         while (!flag.get()) {
1552	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1553	+	//                 throw new AssertionFailedError("timed out");
1554	+	//             Thread.yield();
1555	+	//         }
1556	+	//     }
1557	+
1558	+	public static class NPETask implements Callable<String> {
1559	+	public String call() { throw new NullPointerException(); }
1560	+	}
1561	+
1562	+	public static class CallableOne implements Callable<Integer> {
1563	+	public Integer call() { return one; }
1564	+	}
1565	+
1566	+	public class ShortRunnable extends CheckedRunnable {
1567	+	protected void realRun() throws Throwable {
1568	+	delay(SHORT_DELAY_MS);
1569	+	}
1570	+	}
1571	+
1572	+	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1573	+	protected void realRun() throws InterruptedException {
1574	+	delay(SHORT_DELAY_MS);
1575	+	}
1576	+	}
1577	+
1578	+	public class SmallRunnable extends CheckedRunnable {
1579	+	protected void realRun() throws Throwable {
1580	+	delay(SMALL_DELAY_MS);
1581	+	}
1582	+	}
1583	+
1584	+	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1585	+	protected void realRun() {
1586	+	try {
1587	+	delay(SMALL_DELAY_MS);
1588	+	} catch (InterruptedException ok) {}
1589	+	}
1590	+	}
1591	+
1592	+	public class SmallCallable extends CheckedCallable {
1593	+	protected Object realCall() throws InterruptedException {
1594	+	delay(SMALL_DELAY_MS);
1595		return Boolean.TRUE;
1596		}
1597		}
1598
1599	<	public class SmallInterruptedRunnable implements Runnable {
1599	>	public class MediumRunnable extends CheckedRunnable {
1600	>	protected void realRun() throws Throwable {
1601	>	delay(MEDIUM_DELAY_MS);
1602	>	}
1603	>	}
1604	>
1605	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1606	>	protected void realRun() throws InterruptedException {
1607	>	delay(MEDIUM_DELAY_MS);
1608	>	}
1609	>	}
1610	>
1611	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1612	>	return new CheckedRunnable() {
1613	>	protected void realRun() {
1614	>	try {
1615	>	delay(timeoutMillis);
1616	>	} catch (InterruptedException ok) {}
1617	>	}};
1618	>	}
1619	>
1620	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1621	>	protected void realRun() {
1622	>	try {
1623	>	delay(MEDIUM_DELAY_MS);
1624	>	} catch (InterruptedException ok) {}
1625	>	}
1626	>	}
1627	>
1628	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1629	>	protected void realRun() {
1630	>	try {
1631	>	delay(LONG_DELAY_MS);
1632	>	} catch (InterruptedException ok) {}
1633	>	}
1634	>	}
1635	>
1636	>	/**
1637	>	* For use as ThreadFactory in constructors
1638	>	*/
1639	>	public static class SimpleThreadFactory implements ThreadFactory {
1640	>	public Thread newThread(Runnable r) {
1641	>	return new Thread(r);
1642	>	}
1643	>	}
1644	>
1645	>	public interface TrackedRunnable extends Runnable {
1646	>	boolean isDone();
1647	>	}
1648	>
1649	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1650	>	return new TrackedRunnable() {
1651	>	private volatile boolean done = false;
1652	>	public boolean isDone() { return done; }
1653	>	public void run() {
1654	>	try {
1655	>	delay(timeoutMillis);
1656	>	done = true;
1657	>	} catch (InterruptedException ok) {}
1658	>	}
1659	>	};
1660	>	}
1661	>
1662	>	public static class TrackedShortRunnable implements Runnable {
1663	>	public volatile boolean done = false;
1664		public void run() {
1665		try {
1666	<	Thread.sleep(SMALL_DELAY_MS);
1667	<	threadShouldThrow();
1668	<	}
256	<	catch(InterruptedException success) {
257	<	}
1666	>	delay(SHORT_DELAY_MS);
1667	>	done = true;
1668	>	} catch (InterruptedException ok) {}
1669		}
1670		}
1671
1672	+	public static class TrackedSmallRunnable implements Runnable {
1673	+	public volatile boolean done = false;
1674	+	public void run() {
1675	+	try {
1676	+	delay(SMALL_DELAY_MS);
1677	+	done = true;
1678	+	} catch (InterruptedException ok) {}
1679	+	}
1680	+	}
1681
1682	<	public class MediumRunnable implements Runnable {
1682	>	public static class TrackedMediumRunnable implements Runnable {
1683	>	public volatile boolean done = false;
1684		public void run() {
1685		try {
1686	<	Thread.sleep(MEDIUM_DELAY_MS);
1687	<	}
1688	<	catch(Exception e) {
268	<	threadUnexpectedException();
269	<	}
1686	>	delay(MEDIUM_DELAY_MS);
1687	>	done = true;
1688	>	} catch (InterruptedException ok) {}
1689		}
1690		}
1691
1692	<	public class MediumInterruptedRunnable implements Runnable {
1692	>	public static class TrackedLongRunnable implements Runnable {
1693	>	public volatile boolean done = false;
1694		public void run() {
1695		try {
1696	<	Thread.sleep(MEDIUM_DELAY_MS);
1697	<	threadShouldThrow();
1696	>	delay(LONG_DELAY_MS);
1697	>	done = true;
1698	>	} catch (InterruptedException ok) {}
1699	>	}
1700	>	}
1701	>
1702	>	public static class TrackedNoOpRunnable implements Runnable {
1703	>	public volatile boolean done = false;
1704	>	public void run() {
1705	>	done = true;
1706	>	}
1707	>	}
1708	>
1709	>	public static class TrackedCallable implements Callable {
1710	>	public volatile boolean done = false;
1711	>	public Object call() {
1712	>	try {
1713	>	delay(SMALL_DELAY_MS);
1714	>	done = true;
1715	>	} catch (InterruptedException ok) {}
1716	>	return Boolean.TRUE;
1717	>	}
1718	>	}
1719	>
1720	>	/**
1721	>	* Analog of CheckedRunnable for RecursiveAction
1722	>	*/
1723	>	public abstract class CheckedRecursiveAction extends RecursiveAction {
1724	>	protected abstract void realCompute() throws Throwable;
1725	>
1726	>	@Override protected final void compute() {
1727	>	try {
1728	>	realCompute();
1729	>	} catch (Throwable fail) {
1730	>	threadUnexpectedException(fail);
1731		}
1732	<	catch(InterruptedException success) {
1732	>	}
1733	>	}
1734	>
1735	>	/**
1736	>	* Analog of CheckedCallable for RecursiveTask
1737	>	*/
1738	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1739	>	protected abstract T realCompute() throws Throwable;
1740	>
1741	>	@Override protected final T compute() {
1742	>	try {
1743	>	return realCompute();
1744	>	} catch (Throwable fail) {
1745	>	threadUnexpectedException(fail);
1746	>	return null;
1747		}
1748		}
1749		}
1750
1751	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1752	<	public void run() {
1751	>	/**
1752	>	* For use as RejectedExecutionHandler in constructors
1753	>	*/
1754	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1755	>	public void rejectedExecution(Runnable r,
1756	>	ThreadPoolExecutor executor) {}
1757	>	}
1758	>
1759	>	/**
1760	>	* A CyclicBarrier that uses timed await and fails with
1761	>	* AssertionFailedErrors instead of throwing checked exceptions.
1762	>	*/
1763	>	public static class CheckedBarrier extends CyclicBarrier {
1764	>	public CheckedBarrier(int parties) { super(parties); }
1765	>
1766	>	public int await() {
1767		try {
1768	<	Thread.sleep(MEDIUM_DELAY_MS);
1768	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1769	>	} catch (TimeoutException timedOut) {
1770	>	throw new AssertionFailedError("timed out");
1771	>	} catch (Exception fail) {
1772	>	AssertionFailedError afe =
1773	>	new AssertionFailedError("Unexpected exception: " + fail);
1774	>	afe.initCause(fail);
1775	>	throw afe;
1776		}
1777	<	catch(InterruptedException success) {
1777	>	}
1778	>	}
1779	>
1780	>	void checkEmpty(BlockingQueue q) {
1781	>	try {
1782	>	assertTrue(q.isEmpty());
1783	>	assertEquals(0, q.size());
1784	>	assertNull(q.peek());
1785	>	assertNull(q.poll());
1786	>	assertNull(q.poll(0, MILLISECONDS));
1787	>	assertEquals(q.toString(), "[]");
1788	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1789	>	assertFalse(q.iterator().hasNext());
1790	>	try {
1791	>	q.element();
1792	>	shouldThrow();
1793	>	} catch (NoSuchElementException success) {}
1794	>	try {
1795	>	q.iterator().next();
1796	>	shouldThrow();
1797	>	} catch (NoSuchElementException success) {}
1798	>	try {
1799	>	q.remove();
1800	>	shouldThrow();
1801	>	} catch (NoSuchElementException success) {}
1802	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1803	>	}
1804	>
1805	>	void assertSerialEquals(Object x, Object y) {
1806	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1807	>	}
1808	>
1809	>	void assertNotSerialEquals(Object x, Object y) {
1810	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1811	>	}
1812	>
1813	>	byte[] serialBytes(Object o) {
1814	>	try {
1815	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1816	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1817	>	oos.writeObject(o);
1818	>	oos.flush();
1819	>	oos.close();
1820	>	return bos.toByteArray();
1821	>	} catch (Throwable fail) {
1822	>	threadUnexpectedException(fail);
1823	>	return new byte[0];
1824	>	}
1825	>	}
1826	>
1827	>	@SuppressWarnings("unchecked")
1828	>	<T> T serialClone(T o) {
1829	>	try {
1830	>	ObjectInputStream ois = new ObjectInputStream
1831	>	(new ByteArrayInputStream(serialBytes(o)));
1832	>	T clone = (T) ois.readObject();
1833	>	assertSame(o.getClass(), clone.getClass());
1834	>	return clone;
1835	>	} catch (Throwable fail) {
1836	>	threadUnexpectedException(fail);
1837	>	return null;
1838	>	}
1839	>	}
1840	>
1841	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1842	>	Runnable... throwingActions) {
1843	>	for (Runnable throwingAction : throwingActions) {
1844	>	boolean threw = false;
1845	>	try { throwingAction.run(); }
1846	>	catch (Throwable t) {
1847	>	threw = true;
1848	>	if (!expectedExceptionClass.isInstance(t)) {
1849	>	AssertionFailedError afe =
1850	>	new AssertionFailedError
1851	>	("Expected " + expectedExceptionClass.getName() +
1852	>	", got " + t.getClass().getName());
1853	>	afe.initCause(t);
1854	>	threadUnexpectedException(afe);
1855	>	}
1856		}
1857	+	if (!threw)
1858	+	shouldThrow(expectedExceptionClass.getName());
1859		}
1860		}
1861	<
1861	>
1862	>	public void assertIteratorExhausted(Iterator<?> it) {
1863	>	try {
1864	>	it.next();
1865	>	shouldThrow();
1866	>	} catch (NoSuchElementException success) {}
1867	>	assertFalse(it.hasNext());
1868	>	}
1869	>
1870	>	public <T> Callable<T> callableThrowing(final Exception ex) {
1871	>	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1872	>	}
1873	>
1874	>	public Runnable runnableThrowing(final RuntimeException ex) {
1875	>	return new Runnable() { public void run() { throw ex; }};
1876	>	}
1877	>
1878	>	/** A reusable thread pool to be shared by tests. */
1879	>	static final ExecutorService cachedThreadPool =
1880	>	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1881	>	1000L, MILLISECONDS,
1882	>	new SynchronousQueue<Runnable>());
1883	>
1884	>	static <T> void shuffle(T[] array) {
1885	>	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1886	>	}
1887		}

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