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Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.4 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.213 by jsr166, Fri Dec 9 06:58:57 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 (conformance testing mode)
12	>	* @build *
13	>	* @modules java.management
14	>	* @run junit/othervm/timeout=1000 JSR166TestCase
15	>	*/
16	>
17	>	/*
18	>	* @test
19	>	* @summary JSR-166 tck tests (whitebox tests allowed)
20	>	* @build *
21	>	* @modules java.base/java.util.concurrent:open
22	>	*          java.management
23	>	* @run junit/othervm/timeout=1000 -Djsr166.testImplementationDetails=true JSR166TestCase
24	>	* @run junit/othervm/timeout=1000 -Djsr166.testImplementationDetails=true -Djava.util.concurrent.ForkJoinPool.common.parallelism=0 JSR166TestCase
25	>	*/
26
27	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
28	+	import static java.util.concurrent.TimeUnit.MINUTES;
29	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
30	+
31	+	import java.io.ByteArrayInputStream;
32	+	import java.io.ByteArrayOutputStream;
33	+	import java.io.ObjectInputStream;
34	+	import java.io.ObjectOutputStream;
35	+	import java.lang.management.ManagementFactory;
36	+	import java.lang.management.ThreadInfo;
37	+	import java.lang.management.ThreadMXBean;
38	+	import java.lang.reflect.Constructor;
39	+	import java.lang.reflect.Method;
40	+	import java.lang.reflect.Modifier;
41	+	import java.nio.file.Files;
42	+	import java.nio.file.Paths;
43	+	import java.security.CodeSource;
44	+	import java.security.Permission;
45	+	import java.security.PermissionCollection;
46	+	import java.security.Permissions;
47	+	import java.security.Policy;
48	+	import java.security.ProtectionDomain;
49	+	import java.security.SecurityPermission;
50	+	import java.util.ArrayList;
51	+	import java.util.Arrays;
52	+	import java.util.Collection;
53	+	import java.util.Collections;
54	+	import java.util.Date;
55	+	import java.util.Enumeration;
56	+	import java.util.Iterator;
57	+	import java.util.List;
58	+	import java.util.NoSuchElementException;
59	+	import java.util.PropertyPermission;
60	+	import java.util.concurrent.BlockingQueue;
61	+	import java.util.concurrent.Callable;
62	+	import java.util.concurrent.CountDownLatch;
63	+	import java.util.concurrent.CyclicBarrier;
64	+	import java.util.concurrent.ExecutionException;
65	+	import java.util.concurrent.Executors;
66	+	import java.util.concurrent.ExecutorService;
67	+	import java.util.concurrent.ForkJoinPool;
68	+	import java.util.concurrent.Future;
69	+	import java.util.concurrent.RecursiveAction;
70	+	import java.util.concurrent.RecursiveTask;
71	+	import java.util.concurrent.RejectedExecutionHandler;
72	+	import java.util.concurrent.Semaphore;
73	+	import java.util.concurrent.SynchronousQueue;
74	+	import java.util.concurrent.ThreadFactory;
75	+	import java.util.concurrent.ThreadLocalRandom;
76	+	import java.util.concurrent.ThreadPoolExecutor;
77	+	import java.util.concurrent.TimeoutException;
78	+	import java.util.concurrent.atomic.AtomicBoolean;
79	+	import java.util.concurrent.atomic.AtomicReference;
80	+	import java.util.regex.Matcher;
81	+	import java.util.regex.Pattern;
82	+
83	+	import junit.framework.AssertionFailedError;
84	+	import junit.framework.Test;
85	+	import junit.framework.TestCase;
86	+	import junit.framework.TestResult;
87	+	import junit.framework.TestSuite;
88
89		/**
90	<	* Base class for JSR166 Junit TCK tests.  Defines some constants and
91	<	* utility methods, as well as a simple framework for helping to make
92	<	* sure that assertions failing in generated threads cause the
93	<	* associated test that generated them to itself fail (which JUnit doe
94	<	* not otherwise arrange).  The rules for creating such tests are:
90	>	* Base class for JSR166 Junit TCK tests.  Defines some constants,
91	>	* utility methods and classes, as well as a simple framework for
92	>	* helping to make sure that assertions failing in generated threads
93	>	* cause the associated test that generated them to itself fail (which
94	>	* JUnit does not otherwise arrange).  The rules for creating such
95	>	* tests are:
96		*
97		* <ol>
98		*
99	<	* <li> All assertions in code running in generated threads must use
100	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
101	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
102	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
99	>	* <li>All assertions in code running in generated threads must use
100	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
101	>	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
102	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
103		* particularly recommended) for other code to use these forms too.
104		* Only the most typically used JUnit assertion methods are defined
105	<	* this way, but enough to live with.</li>
105	>	* this way, but enough to live with.
106		*
107	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
108	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
107	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
108	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
109		* them. These methods are used to clear and check for thread
110	<	* assertion failures.</li>
110	>	* assertion failures.
111		*
112	<	* <li>All delays and timeouts must use one of the constants {@link
113	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
114	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
115	<	* discriminatable from zero time, and always allows enough time for
116	<	* the small amounts of computation (creating a thread, calling a few
112	>	* <li>All delays and timeouts must use one of the constants {@code
113	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
114	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
115	>	* discriminable from zero time, and always allows enough time for the
116	>	* small amounts of computation (creating a thread, calling a few
117		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
118		* is always discriminable as larger than SHORT and smaller than
119		* MEDIUM.  And so on. These constants are set to conservative values,
120		* but even so, if there is ever any doubt, they can all be increased
121	<	* in one spot to rerun tests on slower platforms</li>
121	>	* in one spot to rerun tests on slower platforms.
122		*
123	<	* <li> All threads generated must be joined inside each test case
124	<	* method (or <tt>fail</tt> to do so) before returning from the
125	<	* method. The {@link joinPool} method can be used to do this when
126	<	* using Executors.</li>
123	>	* <li>All threads generated must be joined inside each test case
124	>	* method (or {@code fail} to do so) before returning from the
125	>	* method. The {@code joinPool} method can be used to do this when
126	>	* using Executors.
127		*
128		* </ol>
129	+	*
130	+	* <p><b>Other notes</b>
131	+	* <ul>
132	+	*
133	+	* <li>Usually, there is one testcase method per JSR166 method
134	+	* covering "normal" operation, and then as many exception-testing
135	+	* methods as there are exceptions the method can throw. Sometimes
136	+	* there are multiple tests per JSR166 method when the different
137	+	* "normal" behaviors differ significantly. And sometimes testcases
138	+	* cover multiple methods when they cannot be tested in isolation.
139	+	*
140	+	* <li>The documentation style for testcases is to provide as javadoc
141	+	* a simple sentence or two describing the property that the testcase
142	+	* method purports to test. The javadocs do not say anything about how
143	+	* the property is tested. To find out, read the code.
144	+	*
145	+	* <li>These tests are "conformance tests", and do not attempt to
146	+	* test throughput, latency, scalability or other performance factors
147	+	* (see the separate "jtreg" tests for a set intended to check these
148	+	* for the most central aspects of functionality.) So, most tests use
149	+	* the smallest sensible numbers of threads, collection sizes, etc
150	+	* needed to check basic conformance.
151	+	*
152	+	* <li>The test classes currently do not declare inclusion in
153	+	* any particular package to simplify things for people integrating
154	+	* them in TCK test suites.
155	+	*
156	+	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
157	+	* runs all JSR166 unit tests.
158	+	*
159	+	* </ul>
160		*/
161		public class JSR166TestCase extends TestCase {
162	+	private static final boolean useSecurityManager =
163	+	Boolean.getBoolean("jsr166.useSecurityManager");
164	+
165	+	protected static final boolean expensiveTests =
166	+	Boolean.getBoolean("jsr166.expensiveTests");
167	+
168	+	/**
169	+	* If true, also run tests that are not part of the official tck
170	+	* because they test unspecified implementation details.
171	+	*/
172	+	protected static final boolean testImplementationDetails =
173	+	Boolean.getBoolean("jsr166.testImplementationDetails");
174	+
175	+	/**
176	+	* If true, report on stdout all "slow" tests, that is, ones that
177	+	* take more than profileThreshold milliseconds to execute.
178	+	*/
179	+	private static final boolean profileTests =
180	+	Boolean.getBoolean("jsr166.profileTests");
181	+
182	+	/**
183	+	* The number of milliseconds that tests are permitted for
184	+	* execution without being reported, when profileTests is set.
185	+	*/
186	+	private static final long profileThreshold =
187	+	Long.getLong("jsr166.profileThreshold", 100);
188	+
189	+	/**
190	+	* The number of repetitions per test (for tickling rare bugs).
191	+	*/
192	+	private static final int runsPerTest =
193	+	Integer.getInteger("jsr166.runsPerTest", 1);
194	+
195	+	/**
196	+	* The number of repetitions of the test suite (for finding leaks?).
197	+	*/
198	+	private static final int suiteRuns =
199	+	Integer.getInteger("jsr166.suiteRuns", 1);
200	+
201	+	/**
202	+	* Returns the value of the system property, or NaN if not defined.
203	+	*/
204	+	private static float systemPropertyValue(String name) {
205	+	String floatString = System.getProperty(name);
206	+	if (floatString == null)
207	+	return Float.NaN;
208	+	try {
209	+	return Float.parseFloat(floatString);
210	+	} catch (NumberFormatException ex) {
211	+	throw new IllegalArgumentException(
212	+	String.format("Bad float value in system property %s=%s",
213	+	name, floatString));
214	+	}
215	+	}
216	+
217	+	/**
218	+	* The scaling factor to apply to standard delays used in tests.
219	+	* May be initialized from any of:
220	+	* - the "jsr166.delay.factor" system property
221	+	* - the "test.timeout.factor" system property (as used by jtreg)
222	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
223	+	* - hard-coded fuzz factor when using a known slowpoke VM
224	+	*/
225	+	private static final float delayFactor = delayFactor();
226	+
227	+	private static float delayFactor() {
228	+	float x;
229	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
230	+	return x;
231	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
232	+	return x;
233	+	String prop = System.getProperty("java.vm.version");
234	+	if (prop != null && prop.matches(".*debug.*"))
235	+	return 4.0f; // How much slower is fastdebug than product?!
236	+	return 1.0f;
237	+	}
238	+
239	+	public JSR166TestCase() { super(); }
240	+	public JSR166TestCase(String name) { super(name); }
241	+
242	+	/**
243	+	* A filter for tests to run, matching strings of the form
244	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
245	+	* Usefully combined with jsr166.runsPerTest.
246	+	*/
247	+	private static final Pattern methodFilter = methodFilter();
248	+
249	+	private static Pattern methodFilter() {
250	+	String regex = System.getProperty("jsr166.methodFilter");
251	+	return (regex == null) ? null : Pattern.compile(regex);
252	+	}
253	+
254	+	// Instrumentation to debug very rare, but very annoying hung test runs.
255	+	static volatile TestCase currentTestCase;
256	+	// static volatile int currentRun = 0;
257	+	static {
258	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
259	+	// Avoid spurious reports with enormous runsPerTest.
260	+	// A single test case run should never take more than 1 second.
261	+	// But let's cap it at the high end too ...
262	+	final int timeoutMinutes =
263	+	Math.min(15, Math.max(runsPerTest / 60, 1));
264	+	for (TestCase lastTestCase = currentTestCase;;) {
265	+	try { MINUTES.sleep(timeoutMinutes); }
266	+	catch (InterruptedException unexpected) { break; }
267	+	if (lastTestCase == currentTestCase) {
268	+	System.err.printf(
269	+	"Looks like we're stuck running test: %s%n",
270	+	lastTestCase);
271	+	//                     System.err.printf(
272	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
273	+	//                         lastTestCase, currentRun, runsPerTest);
274	+	//                     System.err.println("availableProcessors=" +
275	+	//                         Runtime.getRuntime().availableProcessors());
276	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
277	+	dumpTestThreads();
278	+	// one stack dump is probably enough; more would be spam
279	+	break;
280	+	}
281	+	lastTestCase = currentTestCase;
282	+	}}};
283	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
284	+	thread.setDaemon(true);
285	+	thread.start();
286	+	}
287	+
288	+	//     public static String cpuModel() {
289	+	//         try {
290	+	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
291	+	//                 .matcher(new String(
292	+	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
293	+	//             matcher.find();
294	+	//             return matcher.group(1);
295	+	//         } catch (Exception ex) { return null; }
296	+	//     }
297	+
298	+	public void runBare() throws Throwable {
299	+	currentTestCase = this;
300	+	if (methodFilter == null
301	+	|| methodFilter.matcher(toString()).find())
302	+	super.runBare();
303	+	}
304	+
305	+	protected void runTest() throws Throwable {
306	+	for (int i = 0; i < runsPerTest; i++) {
307	+	// currentRun = i;
308	+	if (profileTests)
309	+	runTestProfiled();
310	+	else
311	+	super.runTest();
312	+	}
313	+	}
314	+
315	+	protected void runTestProfiled() throws Throwable {
316	+	for (int i = 0; i < 2; i++) {
317	+	long startTime = System.nanoTime();
318	+	super.runTest();
319	+	long elapsedMillis = millisElapsedSince(startTime);
320	+	if (elapsedMillis < profileThreshold)
321	+	break;
322	+	// Never report first run of any test; treat it as a
323	+	// warmup run, notably to trigger all needed classloading,
324	+	if (i > 0)
325	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
326	+	}
327	+	}
328	+
329	+	/**
330	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
331	+	*/
332	+	public static void main(String[] args) {
333	+	main(suite(), args);
334	+	}
335	+
336	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
337	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
338	+	long runTime;
339	+	public void startTest(Test test) {}
340	+	protected void printHeader(long runTime) {
341	+	this.runTime = runTime; // defer printing for later
342	+	}
343	+	protected void printFooter(TestResult result) {
344	+	if (result.wasSuccessful()) {
345	+	getWriter().println("OK (" + result.runCount() + " tests)"
346	+	+ "  Time: " + elapsedTimeAsString(runTime));
347	+	} else {
348	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
349	+	super.printFooter(result);
350	+	}
351	+	}
352	+	}
353	+
354	+	/**
355	+	* Returns a TestRunner that doesn't bother with unnecessary
356	+	* fluff, like printing a "." for each test case.
357	+	*/
358	+	static junit.textui.TestRunner newPithyTestRunner() {
359	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
360	+	runner.setPrinter(new PithyResultPrinter(System.out));
361	+	return runner;
362	+	}
363	+
364	+	/**
365	+	* Runs all unit tests in the given test suite.
366	+	* Actual behavior influenced by jsr166.* system properties.
367	+	*/
368	+	static void main(Test suite, String[] args) {
369	+	if (useSecurityManager) {
370	+	System.err.println("Setting a permissive security manager");
371	+	Policy.setPolicy(permissivePolicy());
372	+	System.setSecurityManager(new SecurityManager());
373	+	}
374	+	for (int i = 0; i < suiteRuns; i++) {
375	+	TestResult result = newPithyTestRunner().doRun(suite);
376	+	if (!result.wasSuccessful())
377	+	System.exit(1);
378	+	System.gc();
379	+	System.runFinalization();
380	+	}
381	+	}
382	+
383	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
384	+	TestSuite suite = new TestSuite();
385	+	for (Object suiteOrClass : suiteOrClasses) {
386	+	if (suiteOrClass instanceof TestSuite)
387	+	suite.addTest((TestSuite) suiteOrClass);
388	+	else if (suiteOrClass instanceof Class)
389	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
390	+	else
391	+	throw new ClassCastException("not a test suite or class");
392	+	}
393	+	return suite;
394	+	}
395	+
396	+	public static void addNamedTestClasses(TestSuite suite,
397	+	String... testClassNames) {
398	+	for (String testClassName : testClassNames) {
399	+	try {
400	+	Class<?> testClass = Class.forName(testClassName);
401	+	Method m = testClass.getDeclaredMethod("suite",
402	+	new Class<?>[0]);
403	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
404	+	} catch (Exception e) {
405	+	throw new Error("Missing test class", e);
406	+	}
407	+	}
408	+	}
409	+
410	+	public static final double JAVA_CLASS_VERSION;
411	+	public static final String JAVA_SPECIFICATION_VERSION;
412	+	static {
413	+	try {
414	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
415	+	new java.security.PrivilegedAction<Double>() {
416	+	public Double run() {
417	+	return Double.valueOf(System.getProperty("java.class.version"));}});
418	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
419	+	new java.security.PrivilegedAction<String>() {
420	+	public String run() {
421	+	return System.getProperty("java.specification.version");}});
422	+	} catch (Throwable t) {
423	+	throw new Error(t);
424	+	}
425	+	}
426	+
427	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
428	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
429	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
430	+	public static boolean atLeastJava9() {
431	+	return JAVA_CLASS_VERSION >= 53.0
432	+	// As of 2015-09, java9 still uses 52.0 class file version
433	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
434	+	}
435	+	public static boolean atLeastJava10() {
436	+	return JAVA_CLASS_VERSION >= 54.0
437	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
438	+	}
439	+
440	+	/**
441	+	* Collects all JSR166 unit tests as one suite.
442	+	*/
443	+	public static Test suite() {
444	+	// Java7+ test classes
445	+	TestSuite suite = newTestSuite(
446	+	ForkJoinPoolTest.suite(),
447	+	ForkJoinTaskTest.suite(),
448	+	RecursiveActionTest.suite(),
449	+	RecursiveTaskTest.suite(),
450	+	LinkedTransferQueueTest.suite(),
451	+	PhaserTest.suite(),
452	+	ThreadLocalRandomTest.suite(),
453	+	AbstractExecutorServiceTest.suite(),
454	+	AbstractQueueTest.suite(),
455	+	AbstractQueuedSynchronizerTest.suite(),
456	+	AbstractQueuedLongSynchronizerTest.suite(),
457	+	ArrayBlockingQueueTest.suite(),
458	+	ArrayDequeTest.suite(),
459	+	ArrayListTest.suite(),
460	+	AtomicBooleanTest.suite(),
461	+	AtomicIntegerArrayTest.suite(),
462	+	AtomicIntegerFieldUpdaterTest.suite(),
463	+	AtomicIntegerTest.suite(),
464	+	AtomicLongArrayTest.suite(),
465	+	AtomicLongFieldUpdaterTest.suite(),
466	+	AtomicLongTest.suite(),
467	+	AtomicMarkableReferenceTest.suite(),
468	+	AtomicReferenceArrayTest.suite(),
469	+	AtomicReferenceFieldUpdaterTest.suite(),
470	+	AtomicReferenceTest.suite(),
471	+	AtomicStampedReferenceTest.suite(),
472	+	ConcurrentHashMapTest.suite(),
473	+	ConcurrentLinkedDequeTest.suite(),
474	+	ConcurrentLinkedQueueTest.suite(),
475	+	ConcurrentSkipListMapTest.suite(),
476	+	ConcurrentSkipListSubMapTest.suite(),
477	+	ConcurrentSkipListSetTest.suite(),
478	+	ConcurrentSkipListSubSetTest.suite(),
479	+	CopyOnWriteArrayListTest.suite(),
480	+	CopyOnWriteArraySetTest.suite(),
481	+	CountDownLatchTest.suite(),
482	+	CountedCompleterTest.suite(),
483	+	CyclicBarrierTest.suite(),
484	+	DelayQueueTest.suite(),
485	+	EntryTest.suite(),
486	+	ExchangerTest.suite(),
487	+	ExecutorsTest.suite(),
488	+	ExecutorCompletionServiceTest.suite(),
489	+	FutureTaskTest.suite(),
490	+	LinkedBlockingDequeTest.suite(),
491	+	LinkedBlockingQueueTest.suite(),
492	+	LinkedListTest.suite(),
493	+	LockSupportTest.suite(),
494	+	PriorityBlockingQueueTest.suite(),
495	+	PriorityQueueTest.suite(),
496	+	ReentrantLockTest.suite(),
497	+	ReentrantReadWriteLockTest.suite(),
498	+	ScheduledExecutorTest.suite(),
499	+	ScheduledExecutorSubclassTest.suite(),
500	+	SemaphoreTest.suite(),
501	+	SynchronousQueueTest.suite(),
502	+	SystemTest.suite(),
503	+	ThreadLocalTest.suite(),
504	+	ThreadPoolExecutorTest.suite(),
505	+	ThreadPoolExecutorSubclassTest.suite(),
506	+	ThreadTest.suite(),
507	+	TimeUnitTest.suite(),
508	+	TreeMapTest.suite(),
509	+	TreeSetTest.suite(),
510	+	TreeSubMapTest.suite(),
511	+	TreeSubSetTest.suite(),
512	+	VectorTest.suite());
513	+
514	+	// Java8+ test classes
515	+	if (atLeastJava8()) {
516	+	String[] java8TestClassNames = {
517	+	"ArrayDeque8Test",
518	+	"Atomic8Test",
519	+	"CompletableFutureTest",
520	+	"ConcurrentHashMap8Test",
521	+	"CountedCompleter8Test",
522	+	"DoubleAccumulatorTest",
523	+	"DoubleAdderTest",
524	+	"ForkJoinPool8Test",
525	+	"ForkJoinTask8Test",
526	+	"LongAccumulatorTest",
527	+	"LongAdderTest",
528	+	"SplittableRandomTest",
529	+	"StampedLockTest",
530	+	"SubmissionPublisherTest",
531	+	"ThreadLocalRandom8Test",
532	+	"TimeUnit8Test",
533	+	};
534	+	addNamedTestClasses(suite, java8TestClassNames);
535	+	}
536	+
537	+	// Java9+ test classes
538	+	if (atLeastJava9()) {
539	+	String[] java9TestClassNames = {
540	+	"AtomicBoolean9Test",
541	+	"AtomicInteger9Test",
542	+	"AtomicIntegerArray9Test",
543	+	"AtomicLong9Test",
544	+	"AtomicLongArray9Test",
545	+	"AtomicReference9Test",
546	+	"AtomicReferenceArray9Test",
547	+	"ExecutorCompletionService9Test",
548	+	};
549	+	addNamedTestClasses(suite, java9TestClassNames);
550	+	}
551	+
552	+	return suite;
553	+	}
554	+
555	+	/** Returns list of junit-style test method names in given class. */
556	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
557	+	Method[] methods = testClass.getDeclaredMethods();
558	+	ArrayList<String> names = new ArrayList<String>(methods.length);
559	+	for (Method method : methods) {
560	+	if (method.getName().startsWith("test")
561	+	&& Modifier.isPublic(method.getModifiers())
562	+	// method.getParameterCount() requires jdk8+
563	+	&& method.getParameterTypes().length == 0) {
564	+	names.add(method.getName());
565	+	}
566	+	}
567	+	return names;
568	+	}
569	+
570	+	/**
571	+	* Returns junit-style testSuite for the given test class, but
572	+	* parameterized by passing extra data to each test.
573	+	*/
574	+	public static <ExtraData> Test parameterizedTestSuite
575	+	(Class<? extends JSR166TestCase> testClass,
576	+	Class<ExtraData> dataClass,
577	+	ExtraData data) {
578	+	try {
579	+	TestSuite suite = new TestSuite();
580	+	Constructor c =
581	+	testClass.getDeclaredConstructor(dataClass, String.class);
582	+	for (String methodName : testMethodNames(testClass))
583	+	suite.addTest((Test) c.newInstance(data, methodName));
584	+	return suite;
585	+	} catch (Exception e) {
586	+	throw new Error(e);
587	+	}
588	+	}
589	+
590	+	/**
591	+	* Returns junit-style testSuite for the jdk8 extension of the
592	+	* given test class, but parameterized by passing extra data to
593	+	* each test.  Uses reflection to allow compilation in jdk7.
594	+	*/
595	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
596	+	(Class<? extends JSR166TestCase> testClass,
597	+	Class<ExtraData> dataClass,
598	+	ExtraData data) {
599	+	if (atLeastJava8()) {
600	+	String name = testClass.getName();
601	+	String name8 = name.replaceAll("Test$", "8Test");
602	+	if (name.equals(name8)) throw new Error(name);
603	+	try {
604	+	return (Test)
605	+	Class.forName(name8)
606	+	.getMethod("testSuite", new Class[] { dataClass })
607	+	.invoke(null, data);
608	+	} catch (Exception e) {
609	+	throw new Error(e);
610	+	}
611	+	} else {
612	+	return new TestSuite();
613	+	}
614	+	}
615	+
616	+	// Delays for timing-dependent tests, in milliseconds.
617
618		public static long SHORT_DELAY_MS;
619		public static long SMALL_DELAY_MS;
620		public static long MEDIUM_DELAY_MS;
621		public static long LONG_DELAY_MS;
622
61	–
623		/**
624	<	* Return the shortest timed delay. This could
625	<	* be reimplmented to use for example a Property.
626	<	*/
624	>	* Returns the shortest timed delay. This can be scaled up for
625	>	* slow machines using the jsr166.delay.factor system property,
626	>	* or via jtreg's -timeoutFactor: flag.
627	>	* http://openjdk.java.net/jtreg/command-help.html
628	>	*/
629		protected long getShortDelay() {
630	<	return 100;
630	>	return (long) (50 * delayFactor);
631		}
632
70	–
633		/**
634	<	* Set delays as multiples fo SHORT_DELAY.
634	>	* Sets delays as multiples of SHORT_DELAY.
635		*/
636	<	protected  void setDelays() {
636	>	protected void setDelays() {
637		SHORT_DELAY_MS = getShortDelay();
638	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
638	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
639		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
640	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
640	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
641	>	}
642	>
643	>	/**
644	>	* Returns a timeout in milliseconds to be used in tests that
645	>	* verify that operations block or time out.
646	>	*/
647	>	long timeoutMillis() {
648	>	return SHORT_DELAY_MS / 4;
649		}
650
651		/**
652	<	* Flag set true if any threadAssert methods fail
652	>	* Returns a new Date instance representing a time at least
653	>	* delayMillis milliseconds in the future.
654		*/
655	<	protected volatile boolean threadFailed;
655	>	Date delayedDate(long delayMillis) {
656	>	// Add 1 because currentTimeMillis is known to round into the past.
657	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
658	>	}
659
660		/**
661	<	* Initialize test to indicate that no thread assertions have failed
661	>	* The first exception encountered if any threadAssertXXX method fails.
662		*/
663	<	public void setUp() {
663	>	private final AtomicReference<Throwable> threadFailure
664	>	= new AtomicReference<Throwable>(null);
665	>
666	>	/**
667	>	* Records an exception so that it can be rethrown later in the test
668	>	* harness thread, triggering a test case failure.  Only the first
669	>	* failure is recorded; subsequent calls to this method from within
670	>	* the same test have no effect.
671	>	*/
672	>	public void threadRecordFailure(Throwable t) {
673	>	System.err.println(t);
674	>	dumpTestThreads();
675	>	threadFailure.compareAndSet(null, t);
676	>	}
677	>
678	>	public void setUp() {
679		setDelays();
680	<	threadFailed = false;
680	>	}
681	>
682	>	void tearDownFail(String format, Object... args) {
683	>	String msg = toString() + ": " + String.format(format, args);
684	>	System.err.println(msg);
685	>	dumpTestThreads();
686	>	throw new AssertionFailedError(msg);
687	>	}
688	>
689	>	/**
690	>	* Extra checks that get done for all test cases.
691	>	*
692	>	* Triggers test case failure if any thread assertions have failed,
693	>	* by rethrowing, in the test harness thread, any exception recorded
694	>	* earlier by threadRecordFailure.
695	>	*
696	>	* Triggers test case failure if interrupt status is set in the main thread.
697	>	*/
698	>	public void tearDown() throws Exception {
699	>	Throwable t = threadFailure.getAndSet(null);
700	>	if (t != null) {
701	>	if (t instanceof Error)
702	>	throw (Error) t;
703	>	else if (t instanceof RuntimeException)
704	>	throw (RuntimeException) t;
705	>	else if (t instanceof Exception)
706	>	throw (Exception) t;
707	>	else {
708	>	AssertionFailedError afe =
709	>	new AssertionFailedError(t.toString());
710	>	afe.initCause(t);
711	>	throw afe;
712	>	}
713	>	}
714	>
715	>	if (Thread.interrupted())
716	>	tearDownFail("interrupt status set in main thread");
717	>
718	>	checkForkJoinPoolThreadLeaks();
719		}
720
721		/**
722	<	* Trigger test case failure if any thread assertions have failed
722	>	* Finds missing PoolCleaners
723		*/
724	<	public void tearDown() {
725	<	assertFalse(threadFailed);
724	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
725	>	Thread[] survivors = new Thread[7];
726	>	int count = Thread.enumerate(survivors);
727	>	for (int i = 0; i < count; i++) {
728	>	Thread thread = survivors[i];
729	>	String name = thread.getName();
730	>	if (name.startsWith("ForkJoinPool-")) {
731	>	// give thread some time to terminate
732	>	thread.join(LONG_DELAY_MS);
733	>	if (thread.isAlive())
734	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
735	>	thread);
736	>	}
737	>	}
738	>
739	>	if (!ForkJoinPool.commonPool()
740	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
741	>	tearDownFail("ForkJoin common pool thread stuck");
742		}
743
744	+	/**
745	+	* Just like fail(reason), but additionally recording (using
746	+	* threadRecordFailure) any AssertionFailedError thrown, so that
747	+	* the current testcase will fail.
748	+	*/
749		public void threadFail(String reason) {
750	<	threadFailed = true;
751	<	fail(reason);
750	>	try {
751	>	fail(reason);
752	>	} catch (AssertionFailedError t) {
753	>	threadRecordFailure(t);
754	>	throw t;
755	>	}
756		}
757
758	+	/**
759	+	* Just like assertTrue(b), but additionally recording (using
760	+	* threadRecordFailure) any AssertionFailedError thrown, so that
761	+	* the current testcase will fail.
762	+	*/
763		public void threadAssertTrue(boolean b) {
764	<	if (!b) {
108	<	threadFailed = true;
764	>	try {
765		assertTrue(b);
766	+	} catch (AssertionFailedError t) {
767	+	threadRecordFailure(t);
768	+	throw t;
769		}
770		}
771	+
772	+	/**
773	+	* Just like assertFalse(b), but additionally recording (using
774	+	* threadRecordFailure) any AssertionFailedError thrown, so that
775	+	* the current testcase will fail.
776	+	*/
777		public void threadAssertFalse(boolean b) {
778	<	if (b) {
114	<	threadFailed = true;
778	>	try {
779		assertFalse(b);
780	+	} catch (AssertionFailedError t) {
781	+	threadRecordFailure(t);
782	+	throw t;
783		}
784		}
785	+
786	+	/**
787	+	* Just like assertNull(x), but additionally recording (using
788	+	* threadRecordFailure) any AssertionFailedError thrown, so that
789	+	* the current testcase will fail.
790	+	*/
791		public void threadAssertNull(Object x) {
792	<	if (x != null) {
120	<	threadFailed = true;
792	>	try {
793		assertNull(x);
794	+	} catch (AssertionFailedError t) {
795	+	threadRecordFailure(t);
796	+	throw t;
797		}
798		}
799	+
800	+	/**
801	+	* Just like assertEquals(x, y), but additionally recording (using
802	+	* threadRecordFailure) any AssertionFailedError thrown, so that
803	+	* the current testcase will fail.
804	+	*/
805		public void threadAssertEquals(long x, long y) {
806	<	if (x != y) {
126	<	threadFailed = true;
806	>	try {
807		assertEquals(x, y);
808	+	} catch (AssertionFailedError t) {
809	+	threadRecordFailure(t);
810	+	throw t;
811		}
812		}
813	+
814	+	/**
815	+	* Just like assertEquals(x, y), but additionally recording (using
816	+	* threadRecordFailure) any AssertionFailedError thrown, so that
817	+	* the current testcase will fail.
818	+	*/
819		public void threadAssertEquals(Object x, Object y) {
820	<	if (x != y && (x == null || !x.equals(y))) {
132	<	threadFailed = true;
820	>	try {
821		assertEquals(x, y);
822	+	} catch (AssertionFailedError fail) {
823	+	threadRecordFailure(fail);
824	+	throw fail;
825	+	} catch (Throwable fail) {
826	+	threadUnexpectedException(fail);
827		}
828		}
829
830	+	/**
831	+	* Just like assertSame(x, y), but additionally recording (using
832	+	* threadRecordFailure) any AssertionFailedError thrown, so that
833	+	* the current testcase will fail.
834	+	*/
835	+	public void threadAssertSame(Object x, Object y) {
836	+	try {
837	+	assertSame(x, y);
838	+	} catch (AssertionFailedError fail) {
839	+	threadRecordFailure(fail);
840	+	throw fail;
841	+	}
842	+	}
843	+
844	+	/**
845	+	* Calls threadFail with message "should throw exception".
846	+	*/
847		public void threadShouldThrow() {
848	<	threadFailed = true;
139	<	fail("should throw exception");
848	>	threadFail("should throw exception");
849		}
850
851	<	public void threadUnexpectedException() {
852	<	threadFailed = true;
853	<	fail("Unexpected exception");
851	>	/**
852	>	* Calls threadFail with message "should throw" + exceptionName.
853	>	*/
854	>	public void threadShouldThrow(String exceptionName) {
855	>	threadFail("should throw " + exceptionName);
856		}
857
858	+	/**
859	+	* Records the given exception using {@link #threadRecordFailure},
860	+	* then rethrows the exception, wrapping it in an
861	+	* AssertionFailedError if necessary.
862	+	*/
863	+	public void threadUnexpectedException(Throwable t) {
864	+	threadRecordFailure(t);
865	+	t.printStackTrace();
866	+	if (t instanceof RuntimeException)
867	+	throw (RuntimeException) t;
868	+	else if (t instanceof Error)
869	+	throw (Error) t;
870	+	else {
871	+	AssertionFailedError afe =
872	+	new AssertionFailedError("unexpected exception: " + t);
873	+	afe.initCause(t);
874	+	throw afe;
875	+	}
876	+	}
877
878		/**
879	<	* Wait out termination of a thread pool or fail doing so
879	>	* Delays, via Thread.sleep, for the given millisecond delay, but
880	>	* if the sleep is shorter than specified, may re-sleep or yield
881	>	* until time elapses.  Ensures that the given time, as measured
882	>	* by System.nanoTime(), has elapsed.
883		*/
884	<	public void joinPool(ExecutorService exec) {
884	>	static void delay(long millis) throws InterruptedException {
885	>	long nanos = millis * (1000 * 1000);
886	>	final long wakeupTime = System.nanoTime() + nanos;
887	>	do {
888	>	if (millis > 0L)
889	>	Thread.sleep(millis);
890	>	else // too short to sleep
891	>	Thread.yield();
892	>	nanos = wakeupTime - System.nanoTime();
893	>	millis = nanos / (1000 * 1000);
894	>	} while (nanos >= 0L);
895	>	}
896	>
897	>	/**
898	>	* Allows use of try-with-resources with per-test thread pools.
899	>	*/
900	>	class PoolCleaner implements AutoCloseable {
901	>	private final ExecutorService pool;
902	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
903	>	public void close() { joinPool(pool); }
904	>	}
905	>
906	>	/**
907	>	* An extension of PoolCleaner that has an action to release the pool.
908	>	*/
909	>	class PoolCleanerWithReleaser extends PoolCleaner {
910	>	private final Runnable releaser;
911	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
912	>	super(pool);
913	>	this.releaser = releaser;
914	>	}
915	>	public void close() {
916	>	try {
917	>	releaser.run();
918	>	} finally {
919	>	super.close();
920	>	}
921	>	}
922	>	}
923	>
924	>	PoolCleaner cleaner(ExecutorService pool) {
925	>	return new PoolCleaner(pool);
926	>	}
927	>
928	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
929	>	return new PoolCleanerWithReleaser(pool, releaser);
930	>	}
931	>
932	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
933	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
934	>	}
935	>
936	>	Runnable releaser(final CountDownLatch latch) {
937	>	return new Runnable() { public void run() {
938	>	do { latch.countDown(); }
939	>	while (latch.getCount() > 0);
940	>	}};
941	>	}
942	>
943	>	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
944	>	return new PoolCleanerWithReleaser(pool, releaser(flag));
945	>	}
946	>
947	>	Runnable releaser(final AtomicBoolean flag) {
948	>	return new Runnable() { public void run() { flag.set(true); }};
949	>	}
950	>
951	>	/**
952	>	* Waits out termination of a thread pool or fails doing so.
953	>	*/
954	>	void joinPool(ExecutorService pool) {
955	>	try {
956	>	pool.shutdown();
957	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
958	>	try {
959	>	threadFail("ExecutorService " + pool +
960	>	" did not terminate in a timely manner");
961	>	} finally {
962	>	// last resort, for the benefit of subsequent tests
963	>	pool.shutdownNow();
964	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
965	>	}
966	>	}
967	>	} catch (SecurityException ok) {
968	>	// Allowed in case test doesn't have privs
969	>	} catch (InterruptedException fail) {
970	>	threadFail("Unexpected InterruptedException");
971	>	}
972	>	}
973	>
974	>	/**
975	>	* Like Runnable, but with the freedom to throw anything.
976	>	* junit folks had the same idea:
977	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
978	>	*/
979	>	interface Action { public void run() throws Throwable; }
980	>
981	>	/**
982	>	* Runs all the given actions in parallel, failing if any fail.
983	>	* Useful for running multiple variants of tests that are
984	>	* necessarily individually slow because they must block.
985	>	*/
986	>	void testInParallel(Action ... actions) {
987	>	ExecutorService pool = Executors.newCachedThreadPool();
988	>	try (PoolCleaner cleaner = cleaner(pool)) {
989	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
990	>	for (final Action action : actions)
991	>	futures.add(pool.submit(new CheckedRunnable() {
992	>	public void realRun() throws Throwable { action.run();}}));
993	>	for (Future<?> future : futures)
994	>	try {
995	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
996	>	} catch (ExecutionException ex) {
997	>	threadUnexpectedException(ex.getCause());
998	>	} catch (Exception ex) {
999	>	threadUnexpectedException(ex);
1000	>	}
1001	>	}
1002	>	}
1003	>
1004	>	/**
1005	>	* A debugging tool to print stack traces of most threads, as jstack does.
1006	>	* Uninteresting threads are filtered out.
1007	>	*/
1008	>	static void dumpTestThreads() {
1009	>	SecurityManager sm = System.getSecurityManager();
1010	>	if (sm != null) {
1011	>	try {
1012	>	System.setSecurityManager(null);
1013	>	} catch (SecurityException giveUp) {
1014	>	return;
1015	>	}
1016	>	}
1017	>
1018	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1019	>	System.err.println("------ stacktrace dump start ------");
1020	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1021	>	final String name = info.getThreadName();
1022	>	String lockName;
1023	>	if ("Signal Dispatcher".equals(name))
1024	>	continue;
1025	>	if ("Reference Handler".equals(name)
1026	>	&& (lockName = info.getLockName()) != null
1027	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1028	>	continue;
1029	>	if ("Finalizer".equals(name)
1030	>	&& (lockName = info.getLockName()) != null
1031	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1032	>	continue;
1033	>	if ("checkForWedgedTest".equals(name))
1034	>	continue;
1035	>	System.err.print(info);
1036	>	}
1037	>	System.err.println("------ stacktrace dump end ------");
1038	>
1039	>	if (sm != null) System.setSecurityManager(sm);
1040	>	}
1041	>
1042	>	/**
1043	>	* Checks that thread does not terminate within the default
1044	>	* millisecond delay of {@code timeoutMillis()}.
1045	>	*/
1046	>	void assertThreadStaysAlive(Thread thread) {
1047	>	assertThreadStaysAlive(thread, timeoutMillis());
1048	>	}
1049	>
1050	>	/**
1051	>	* Checks that thread does not terminate within the given millisecond delay.
1052	>	*/
1053	>	void assertThreadStaysAlive(Thread thread, long millis) {
1054		try {
1055	<	exec.shutdown();
1056	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
1057	<	} catch(InterruptedException ie) {
1058	<	fail("Unexpected exception");
1055	>	// No need to optimize the failing case via Thread.join.
1056	>	delay(millis);
1057	>	assertTrue(thread.isAlive());
1058	>	} catch (InterruptedException fail) {
1059	>	threadFail("Unexpected InterruptedException");
1060		}
1061		}
1062
1063	<
1063	>	/**
1064	>	* Checks that the threads do not terminate within the default
1065	>	* millisecond delay of {@code timeoutMillis()}.
1066	>	*/
1067	>	void assertThreadsStayAlive(Thread... threads) {
1068	>	assertThreadsStayAlive(timeoutMillis(), threads);
1069	>	}
1070	>
1071	>	/**
1072	>	* Checks that the threads do not terminate within the given millisecond delay.
1073	>	*/
1074	>	void assertThreadsStayAlive(long millis, Thread... threads) {
1075	>	try {
1076	>	// No need to optimize the failing case via Thread.join.
1077	>	delay(millis);
1078	>	for (Thread thread : threads)
1079	>	assertTrue(thread.isAlive());
1080	>	} catch (InterruptedException fail) {
1081	>	threadFail("Unexpected InterruptedException");
1082	>	}
1083	>	}
1084	>
1085	>	/**
1086	>	* Checks that future.get times out, with the default timeout of
1087	>	* {@code timeoutMillis()}.
1088	>	*/
1089	>	void assertFutureTimesOut(Future future) {
1090	>	assertFutureTimesOut(future, timeoutMillis());
1091	>	}
1092	>
1093	>	/**
1094	>	* Checks that future.get times out, with the given millisecond timeout.
1095	>	*/
1096	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
1097	>	long startTime = System.nanoTime();
1098	>	try {
1099	>	future.get(timeoutMillis, MILLISECONDS);
1100	>	shouldThrow();
1101	>	} catch (TimeoutException success) {
1102	>	} catch (Exception fail) {
1103	>	threadUnexpectedException(fail);
1104	>	} finally { future.cancel(true); }
1105	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1106	>	}
1107	>
1108	>	/**
1109	>	* Fails with message "should throw exception".
1110	>	*/
1111		public void shouldThrow() {
1112		fail("Should throw exception");
1113		}
1114
1115	<	public void unexpectedException() {
1116	<	fail("Unexpected exception");
1115	>	/**
1116	>	* Fails with message "should throw " + exceptionName.
1117	>	*/
1118	>	public void shouldThrow(String exceptionName) {
1119	>	fail("Should throw " + exceptionName);
1120		}
1121
169	–
1122		/**
1123		* The number of elements to place in collections, arrays, etc.
1124		*/
#	Line 174 | Line 1126 | public class JSR166TestCase extends Test
1126
1127		// Some convenient Integer constants
1128
1129	<	public static final Integer zero = new Integer(0);
1130	<	public static final Integer one = new Integer(1);
1131	<	public static final Integer two = new Integer(2);
1132	<	public static final Integer three  = new Integer(3);
1129	>	public static final Integer zero  = new Integer(0);
1130	>	public static final Integer one   = new Integer(1);
1131	>	public static final Integer two   = new Integer(2);
1132	>	public static final Integer three = new Integer(3);
1133		public static final Integer four  = new Integer(4);
1134		public static final Integer five  = new Integer(5);
1135	<	public static final Integer six = new Integer(6);
1135	>	public static final Integer six   = new Integer(6);
1136		public static final Integer seven = new Integer(7);
1137		public static final Integer eight = new Integer(8);
1138	<	public static final Integer nine = new Integer(9);
1138	>	public static final Integer nine  = new Integer(9);
1139		public static final Integer m1  = new Integer(-1);
1140		public static final Integer m2  = new Integer(-2);
1141		public static final Integer m3  = new Integer(-3);
1142	<	public static final Integer m4 = new Integer(-4);
1143	<	public static final Integer m5 = new Integer(-5);
1142	>	public static final Integer m4  = new Integer(-4);
1143	>	public static final Integer m5  = new Integer(-5);
1144	>	public static final Integer m6  = new Integer(-6);
1145		public static final Integer m10 = new Integer(-10);
1146
1147	+	/**
1148	+	* Runs Runnable r with a security policy that permits precisely
1149	+	* the specified permissions.  If there is no current security
1150	+	* manager, the runnable is run twice, both with and without a
1151	+	* security manager.  We require that any security manager permit
1152	+	* getPolicy/setPolicy.
1153	+	*/
1154	+	public void runWithPermissions(Runnable r, Permission... permissions) {
1155	+	SecurityManager sm = System.getSecurityManager();
1156	+	if (sm == null) {
1157	+	r.run();
1158	+	}
1159	+	runWithSecurityManagerWithPermissions(r, permissions);
1160	+	}
1161
1162	<	// Some convenient Runnable classes
1162	>	/**
1163	>	* Runs Runnable r with a security policy that permits precisely
1164	>	* the specified permissions.  If there is no current security
1165	>	* manager, a temporary one is set for the duration of the
1166	>	* Runnable.  We require that any security manager permit
1167	>	* getPolicy/setPolicy.
1168	>	*/
1169	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1170	>	Permission... permissions) {
1171	>	SecurityManager sm = System.getSecurityManager();
1172	>	if (sm == null) {
1173	>	Policy savedPolicy = Policy.getPolicy();
1174	>	try {
1175	>	Policy.setPolicy(permissivePolicy());
1176	>	System.setSecurityManager(new SecurityManager());
1177	>	runWithSecurityManagerWithPermissions(r, permissions);
1178	>	} finally {
1179	>	System.setSecurityManager(null);
1180	>	Policy.setPolicy(savedPolicy);
1181	>	}
1182	>	} else {
1183	>	Policy savedPolicy = Policy.getPolicy();
1184	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1185	>	Policy.setPolicy(policy);
1186
1187	<	public static class NoOpRunnable implements Runnable {
1188	<	public void run() {}
1187	>	try {
1188	>	r.run();
1189	>	} finally {
1190	>	policy.addPermission(new SecurityPermission("setPolicy"));
1191	>	Policy.setPolicy(savedPolicy);
1192	>	}
1193	>	}
1194		}
1195
1196	<	public static class NoOpCallable implements Callable {
1197	<	public Object call() { return Boolean.TRUE; }
1196	>	/**
1197	>	* Runs a runnable without any permissions.
1198	>	*/
1199	>	public void runWithoutPermissions(Runnable r) {
1200	>	runWithPermissions(r);
1201		}
1202
1203	<	public class ShortRunnable implements Runnable {
1204	<	public void run() {
1205	<	try {
1206	<	Thread.sleep(SHORT_DELAY_MS);
1203	>	/**
1204	>	* A security policy where new permissions can be dynamically added
1205	>	* or all cleared.
1206	>	*/
1207	>	public static class AdjustablePolicy extends java.security.Policy {
1208	>	Permissions perms = new Permissions();
1209	>	AdjustablePolicy(Permission... permissions) {
1210	>	for (Permission permission : permissions)
1211	>	perms.add(permission);
1212	>	}
1213	>	void addPermission(Permission perm) { perms.add(perm); }
1214	>	void clearPermissions() { perms = new Permissions(); }
1215	>	public PermissionCollection getPermissions(CodeSource cs) {
1216	>	return perms;
1217	>	}
1218	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1219	>	return perms;
1220	>	}
1221	>	public boolean implies(ProtectionDomain pd, Permission p) {
1222	>	return perms.implies(p);
1223	>	}
1224	>	public void refresh() {}
1225	>	public String toString() {
1226	>	List<Permission> ps = new ArrayList<Permission>();
1227	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1228	>	ps.add(e.nextElement());
1229	>	return "AdjustablePolicy with permissions " + ps;
1230	>	}
1231	>	}
1232	>
1233	>	/**
1234	>	* Returns a policy containing all the permissions we ever need.
1235	>	*/
1236	>	public static Policy permissivePolicy() {
1237	>	return new AdjustablePolicy
1238	>	// Permissions j.u.c. needs directly
1239	>	(new RuntimePermission("modifyThread"),
1240	>	new RuntimePermission("getClassLoader"),
1241	>	new RuntimePermission("setContextClassLoader"),
1242	>	// Permissions needed to change permissions!
1243	>	new SecurityPermission("getPolicy"),
1244	>	new SecurityPermission("setPolicy"),
1245	>	new RuntimePermission("setSecurityManager"),
1246	>	// Permissions needed by the junit test harness
1247	>	new RuntimePermission("accessDeclaredMembers"),
1248	>	new PropertyPermission("*", "read"),
1249	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1250	>	}
1251	>
1252	>	/**
1253	>	* Sleeps until the given time has elapsed.
1254	>	* Throws AssertionFailedError if interrupted.
1255	>	*/
1256	>	static void sleep(long millis) {
1257	>	try {
1258	>	delay(millis);
1259	>	} catch (InterruptedException fail) {
1260	>	AssertionFailedError afe =
1261	>	new AssertionFailedError("Unexpected InterruptedException");
1262	>	afe.initCause(fail);
1263	>	throw afe;
1264	>	}
1265	>	}
1266	>
1267	>	/**
1268	>	* Spin-waits up to the specified number of milliseconds for the given
1269	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1270	>	*/
1271	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1272	>	long startTime = 0L;
1273	>	for (;;) {
1274	>	Thread.State s = thread.getState();
1275	>	if (s == Thread.State.BLOCKED ||
1276	>	s == Thread.State.WAITING ||
1277	>	s == Thread.State.TIMED_WAITING)
1278	>	return;
1279	>	else if (s == Thread.State.TERMINATED)
1280	>	fail("Unexpected thread termination");
1281	>	else if (startTime == 0L)
1282	>	startTime = System.nanoTime();
1283	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1284	>	threadAssertTrue(thread.isAlive());
1285	>	return;
1286		}
1287	<	catch(Exception e) {
1288	<	threadUnexpectedException();
1287	>	Thread.yield();
1288	>	}
1289	>	}
1290	>
1291	>	/**
1292	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1293	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1294	>	*/
1295	>	void waitForThreadToEnterWaitState(Thread thread) {
1296	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1297	>	}
1298	>
1299	>	/**
1300	>	* Returns the number of milliseconds since time given by
1301	>	* startNanoTime, which must have been previously returned from a
1302	>	* call to {@link System#nanoTime()}.
1303	>	*/
1304	>	static long millisElapsedSince(long startNanoTime) {
1305	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1306	>	}
1307	>
1308	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1309	>	//         long startTime = System.nanoTime();
1310	>	//         try {
1311	>	//             r.run();
1312	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1313	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1314	>	//             throw new AssertionFailedError("did not return promptly");
1315	>	//     }
1316	>
1317	>	//     void assertTerminatesPromptly(Runnable r) {
1318	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1319	>	//     }
1320	>
1321	>	/**
1322	>	* Checks that timed f.get() returns the expected value, and does not
1323	>	* wait for the timeout to elapse before returning.
1324	>	*/
1325	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1326	>	long startTime = System.nanoTime();
1327	>	try {
1328	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1329	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1330	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1331	>	throw new AssertionFailedError("timed get did not return promptly");
1332	>	}
1333	>
1334	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1335	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1336	>	}
1337	>
1338	>	/**
1339	>	* Returns a new started daemon Thread running the given runnable.
1340	>	*/
1341	>	Thread newStartedThread(Runnable runnable) {
1342	>	Thread t = new Thread(runnable);
1343	>	t.setDaemon(true);
1344	>	t.start();
1345	>	return t;
1346	>	}
1347	>
1348	>	/**
1349	>	* Waits for the specified time (in milliseconds) for the thread
1350	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1351	>	* the thread (in the hope that it may terminate later) and fails.
1352	>	*/
1353	>	void awaitTermination(Thread t, long timeoutMillis) {
1354	>	try {
1355	>	t.join(timeoutMillis);
1356	>	} catch (InterruptedException fail) {
1357	>	threadUnexpectedException(fail);
1358	>	} finally {
1359	>	if (t.getState() != Thread.State.TERMINATED) {
1360	>	t.interrupt();
1361	>	threadFail("timed out waiting for thread to terminate");
1362		}
1363		}
1364		}
1365
1366	<	public class ShortInterruptedRunnable implements Runnable {
1367	<	public void run() {
1366	>	/**
1367	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1368	>	* terminate (using {@link Thread#join(long)}), else interrupts
1369	>	* the thread (in the hope that it may terminate later) and fails.
1370	>	*/
1371	>	void awaitTermination(Thread t) {
1372	>	awaitTermination(t, LONG_DELAY_MS);
1373	>	}
1374	>
1375	>	// Some convenient Runnable classes
1376	>
1377	>	public abstract class CheckedRunnable implements Runnable {
1378	>	protected abstract void realRun() throws Throwable;
1379	>
1380	>	public final void run() {
1381		try {
1382	<	Thread.sleep(SHORT_DELAY_MS);
1383	<	threadShouldThrow();
1382	>	realRun();
1383	>	} catch (Throwable fail) {
1384	>	threadUnexpectedException(fail);
1385		}
1386	<	catch(InterruptedException success) {
1386	>	}
1387	>	}
1388	>
1389	>	public abstract class RunnableShouldThrow implements Runnable {
1390	>	protected abstract void realRun() throws Throwable;
1391	>
1392	>	final Class<?> exceptionClass;
1393	>
1394	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1395	>	this.exceptionClass = exceptionClass;
1396	>	}
1397	>
1398	>	public final void run() {
1399	>	try {
1400	>	realRun();
1401	>	threadShouldThrow(exceptionClass.getSimpleName());
1402	>	} catch (Throwable t) {
1403	>	if (! exceptionClass.isInstance(t))
1404	>	threadUnexpectedException(t);
1405		}
1406		}
1407		}
1408
1409	<	public class SmallRunnable implements Runnable {
1410	<	public void run() {
1409	>	public abstract class ThreadShouldThrow extends Thread {
1410	>	protected abstract void realRun() throws Throwable;
1411	>
1412	>	final Class<?> exceptionClass;
1413	>
1414	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1415	>	this.exceptionClass = exceptionClass;
1416	>	}
1417	>
1418	>	public final void run() {
1419		try {
1420	<	Thread.sleep(SMALL_DELAY_MS);
1420	>	realRun();
1421	>	threadShouldThrow(exceptionClass.getSimpleName());
1422	>	} catch (Throwable t) {
1423	>	if (! exceptionClass.isInstance(t))
1424	>	threadUnexpectedException(t);
1425		}
1426	<	catch(Exception e) {
1427	<	threadUnexpectedException();
1426	>	}
1427	>	}
1428	>
1429	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1430	>	protected abstract void realRun() throws Throwable;
1431	>
1432	>	public final void run() {
1433	>	try {
1434	>	realRun();
1435	>	threadShouldThrow("InterruptedException");
1436	>	} catch (InterruptedException success) {
1437	>	threadAssertFalse(Thread.interrupted());
1438	>	} catch (Throwable fail) {
1439	>	threadUnexpectedException(fail);
1440		}
1441		}
1442		}
1443
1444	<	public class SmallCallable implements Callable {
1445	<	public Object call() {
1444	>	public abstract class CheckedCallable<T> implements Callable<T> {
1445	>	protected abstract T realCall() throws Throwable;
1446	>
1447	>	public final T call() {
1448		try {
1449	<	Thread.sleep(SMALL_DELAY_MS);
1449	>	return realCall();
1450	>	} catch (Throwable fail) {
1451	>	threadUnexpectedException(fail);
1452	>	return null;
1453		}
1454	<	catch(Exception e) {
1455	<	threadUnexpectedException();
1454	>	}
1455	>	}
1456	>
1457	>	public abstract class CheckedInterruptedCallable<T>
1458	>	implements Callable<T> {
1459	>	protected abstract T realCall() throws Throwable;
1460	>
1461	>	public final T call() {
1462	>	try {
1463	>	T result = realCall();
1464	>	threadShouldThrow("InterruptedException");
1465	>	return result;
1466	>	} catch (InterruptedException success) {
1467	>	threadAssertFalse(Thread.interrupted());
1468	>	} catch (Throwable fail) {
1469	>	threadUnexpectedException(fail);
1470		}
1471	+	return null;
1472	+	}
1473	+	}
1474	+
1475	+	public static class NoOpRunnable implements Runnable {
1476	+	public void run() {}
1477	+	}
1478	+
1479	+	public static class NoOpCallable implements Callable {
1480	+	public Object call() { return Boolean.TRUE; }
1481	+	}
1482	+
1483	+	public static final String TEST_STRING = "a test string";
1484	+
1485	+	public static class StringTask implements Callable<String> {
1486	+	final String value;
1487	+	public StringTask() { this(TEST_STRING); }
1488	+	public StringTask(String value) { this.value = value; }
1489	+	public String call() { return value; }
1490	+	}
1491	+
1492	+	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1493	+	return new CheckedCallable<String>() {
1494	+	protected String realCall() {
1495	+	try {
1496	+	latch.await();
1497	+	} catch (InterruptedException quittingTime) {}
1498	+	return TEST_STRING;
1499	+	}};
1500	+	}
1501	+
1502	+	public Runnable countDowner(final CountDownLatch latch) {
1503	+	return new CheckedRunnable() {
1504	+	public void realRun() throws InterruptedException {
1505	+	latch.countDown();
1506	+	}};
1507	+	}
1508	+
1509	+	class LatchAwaiter extends CheckedRunnable {
1510	+	static final int NEW = 0;
1511	+	static final int RUNNING = 1;
1512	+	static final int DONE = 2;
1513	+	final CountDownLatch latch;
1514	+	int state = NEW;
1515	+	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1516	+	public void realRun() throws InterruptedException {
1517	+	state = 1;
1518	+	await(latch);
1519	+	state = 2;
1520	+	}
1521	+	}
1522	+
1523	+	public LatchAwaiter awaiter(CountDownLatch latch) {
1524	+	return new LatchAwaiter(latch);
1525	+	}
1526	+
1527	+	public void await(CountDownLatch latch, long timeoutMillis) {
1528	+	try {
1529	+	if (!latch.await(timeoutMillis, MILLISECONDS))
1530	+	fail("timed out waiting for CountDownLatch for "
1531	+	+ (timeoutMillis/1000) + " sec");
1532	+	} catch (Throwable fail) {
1533	+	threadUnexpectedException(fail);
1534	+	}
1535	+	}
1536	+
1537	+	public void await(CountDownLatch latch) {
1538	+	await(latch, LONG_DELAY_MS);
1539	+	}
1540	+
1541	+	public void await(Semaphore semaphore) {
1542	+	try {
1543	+	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1544	+	fail("timed out waiting for Semaphore for "
1545	+	+ (LONG_DELAY_MS/1000) + " sec");
1546	+	} catch (Throwable fail) {
1547	+	threadUnexpectedException(fail);
1548	+	}
1549	+	}
1550	+
1551	+	//     /**
1552	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1553	+	//      */
1554	+	//     public void await(AtomicBoolean flag) {
1555	+	//         await(flag, LONG_DELAY_MS);
1556	+	//     }
1557	+
1558	+	//     /**
1559	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1560	+	//      */
1561	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1562	+	//         long startTime = System.nanoTime();
1563	+	//         while (!flag.get()) {
1564	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1565	+	//                 throw new AssertionFailedError("timed out");
1566	+	//             Thread.yield();
1567	+	//         }
1568	+	//     }
1569	+
1570	+	public static class NPETask implements Callable<String> {
1571	+	public String call() { throw new NullPointerException(); }
1572	+	}
1573	+
1574	+	public static class CallableOne implements Callable<Integer> {
1575	+	public Integer call() { return one; }
1576	+	}
1577	+
1578	+	public class ShortRunnable extends CheckedRunnable {
1579	+	protected void realRun() throws Throwable {
1580	+	delay(SHORT_DELAY_MS);
1581	+	}
1582	+	}
1583	+
1584	+	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1585	+	protected void realRun() throws InterruptedException {
1586	+	delay(SHORT_DELAY_MS);
1587	+	}
1588	+	}
1589	+
1590	+	public class SmallRunnable extends CheckedRunnable {
1591	+	protected void realRun() throws Throwable {
1592	+	delay(SMALL_DELAY_MS);
1593	+	}
1594	+	}
1595	+
1596	+	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1597	+	protected void realRun() {
1598	+	try {
1599	+	delay(SMALL_DELAY_MS);
1600	+	} catch (InterruptedException ok) {}
1601	+	}
1602	+	}
1603	+
1604	+	public class SmallCallable extends CheckedCallable {
1605	+	protected Object realCall() throws InterruptedException {
1606	+	delay(SMALL_DELAY_MS);
1607		return Boolean.TRUE;
1608		}
1609		}
1610
1611	<	public class SmallInterruptedRunnable implements Runnable {
1611	>	public class MediumRunnable extends CheckedRunnable {
1612	>	protected void realRun() throws Throwable {
1613	>	delay(MEDIUM_DELAY_MS);
1614	>	}
1615	>	}
1616	>
1617	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1618	>	protected void realRun() throws InterruptedException {
1619	>	delay(MEDIUM_DELAY_MS);
1620	>	}
1621	>	}
1622	>
1623	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1624	>	return new CheckedRunnable() {
1625	>	protected void realRun() {
1626	>	try {
1627	>	delay(timeoutMillis);
1628	>	} catch (InterruptedException ok) {}
1629	>	}};
1630	>	}
1631	>
1632	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1633	>	protected void realRun() {
1634	>	try {
1635	>	delay(MEDIUM_DELAY_MS);
1636	>	} catch (InterruptedException ok) {}
1637	>	}
1638	>	}
1639	>
1640	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1641	>	protected void realRun() {
1642	>	try {
1643	>	delay(LONG_DELAY_MS);
1644	>	} catch (InterruptedException ok) {}
1645	>	}
1646	>	}
1647	>
1648	>	/**
1649	>	* For use as ThreadFactory in constructors
1650	>	*/
1651	>	public static class SimpleThreadFactory implements ThreadFactory {
1652	>	public Thread newThread(Runnable r) {
1653	>	return new Thread(r);
1654	>	}
1655	>	}
1656	>
1657	>	public interface TrackedRunnable extends Runnable {
1658	>	boolean isDone();
1659	>	}
1660	>
1661	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1662	>	return new TrackedRunnable() {
1663	>	private volatile boolean done = false;
1664	>	public boolean isDone() { return done; }
1665	>	public void run() {
1666	>	try {
1667	>	delay(timeoutMillis);
1668	>	done = true;
1669	>	} catch (InterruptedException ok) {}
1670	>	}
1671	>	};
1672	>	}
1673	>
1674	>	public static class TrackedShortRunnable implements Runnable {
1675	>	public volatile boolean done = false;
1676		public void run() {
1677		try {
1678	<	Thread.sleep(SMALL_DELAY_MS);
1679	<	threadShouldThrow();
1680	<	}
256	<	catch(InterruptedException success) {
257	<	}
1678	>	delay(SHORT_DELAY_MS);
1679	>	done = true;
1680	>	} catch (InterruptedException ok) {}
1681		}
1682		}
1683
1684	+	public static class TrackedSmallRunnable implements Runnable {
1685	+	public volatile boolean done = false;
1686	+	public void run() {
1687	+	try {
1688	+	delay(SMALL_DELAY_MS);
1689	+	done = true;
1690	+	} catch (InterruptedException ok) {}
1691	+	}
1692	+	}
1693
1694	<	public class MediumRunnable implements Runnable {
1694	>	public static class TrackedMediumRunnable implements Runnable {
1695	>	public volatile boolean done = false;
1696		public void run() {
1697		try {
1698	<	Thread.sleep(MEDIUM_DELAY_MS);
1699	<	}
1700	<	catch(Exception e) {
1701	<	threadUnexpectedException();
1702	<	}
1698	>	delay(MEDIUM_DELAY_MS);
1699	>	done = true;
1700	>	} catch (InterruptedException ok) {}
1701	>	}
1702	>	}
1703	>
1704	>	public static class TrackedLongRunnable implements Runnable {
1705	>	public volatile boolean done = false;
1706	>	public void run() {
1707	>	try {
1708	>	delay(LONG_DELAY_MS);
1709	>	done = true;
1710	>	} catch (InterruptedException ok) {}
1711		}
1712		}
1713
1714	<	public class MediumInterruptedRunnable implements Runnable {
1714	>	public static class TrackedNoOpRunnable implements Runnable {
1715	>	public volatile boolean done = false;
1716		public void run() {
1717	+	done = true;
1718	+	}
1719	+	}
1720	+
1721	+	public static class TrackedCallable implements Callable {
1722	+	public volatile boolean done = false;
1723	+	public Object call() {
1724	+	try {
1725	+	delay(SMALL_DELAY_MS);
1726	+	done = true;
1727	+	} catch (InterruptedException ok) {}
1728	+	return Boolean.TRUE;
1729	+	}
1730	+	}
1731	+
1732	+	/**
1733	+	* Analog of CheckedRunnable for RecursiveAction
1734	+	*/
1735	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1736	+	protected abstract void realCompute() throws Throwable;
1737	+
1738	+	@Override protected final void compute() {
1739		try {
1740	<	Thread.sleep(MEDIUM_DELAY_MS);
1741	<	threadShouldThrow();
1740	>	realCompute();
1741	>	} catch (Throwable fail) {
1742	>	threadUnexpectedException(fail);
1743		}
1744	<	catch(InterruptedException success) {
1744	>	}
1745	>	}
1746	>
1747	>	/**
1748	>	* Analog of CheckedCallable for RecursiveTask
1749	>	*/
1750	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1751	>	protected abstract T realCompute() throws Throwable;
1752	>
1753	>	@Override protected final T compute() {
1754	>	try {
1755	>	return realCompute();
1756	>	} catch (Throwable fail) {
1757	>	threadUnexpectedException(fail);
1758	>	return null;
1759		}
1760		}
1761		}
1762
1763	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1764	<	public void run() {
1763	>	/**
1764	>	* For use as RejectedExecutionHandler in constructors
1765	>	*/
1766	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1767	>	public void rejectedExecution(Runnable r,
1768	>	ThreadPoolExecutor executor) {}
1769	>	}
1770	>
1771	>	/**
1772	>	* A CyclicBarrier that uses timed await and fails with
1773	>	* AssertionFailedErrors instead of throwing checked exceptions.
1774	>	*/
1775	>	public static class CheckedBarrier extends CyclicBarrier {
1776	>	public CheckedBarrier(int parties) { super(parties); }
1777	>
1778	>	public int await() {
1779		try {
1780	<	Thread.sleep(MEDIUM_DELAY_MS);
1780	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1781	>	} catch (TimeoutException timedOut) {
1782	>	throw new AssertionFailedError("timed out");
1783	>	} catch (Exception fail) {
1784	>	AssertionFailedError afe =
1785	>	new AssertionFailedError("Unexpected exception: " + fail);
1786	>	afe.initCause(fail);
1787	>	throw afe;
1788		}
1789	<	catch(InterruptedException success) {
1789	>	}
1790	>	}
1791	>
1792	>	void checkEmpty(BlockingQueue q) {
1793	>	try {
1794	>	assertTrue(q.isEmpty());
1795	>	assertEquals(0, q.size());
1796	>	assertNull(q.peek());
1797	>	assertNull(q.poll());
1798	>	assertNull(q.poll(0, MILLISECONDS));
1799	>	assertEquals(q.toString(), "[]");
1800	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1801	>	assertFalse(q.iterator().hasNext());
1802	>	try {
1803	>	q.element();
1804	>	shouldThrow();
1805	>	} catch (NoSuchElementException success) {}
1806	>	try {
1807	>	q.iterator().next();
1808	>	shouldThrow();
1809	>	} catch (NoSuchElementException success) {}
1810	>	try {
1811	>	q.remove();
1812	>	shouldThrow();
1813	>	} catch (NoSuchElementException success) {}
1814	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1815	>	}
1816	>
1817	>	void assertSerialEquals(Object x, Object y) {
1818	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1819	>	}
1820	>
1821	>	void assertNotSerialEquals(Object x, Object y) {
1822	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1823	>	}
1824	>
1825	>	byte[] serialBytes(Object o) {
1826	>	try {
1827	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1828	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1829	>	oos.writeObject(o);
1830	>	oos.flush();
1831	>	oos.close();
1832	>	return bos.toByteArray();
1833	>	} catch (Throwable fail) {
1834	>	threadUnexpectedException(fail);
1835	>	return new byte[0];
1836	>	}
1837	>	}
1838	>
1839	>	void assertImmutable(final Object o) {
1840	>	if (o instanceof Collection) {
1841	>	assertThrows(
1842	>	UnsupportedOperationException.class,
1843	>	new Runnable() { public void run() {
1844	>	((Collection) o).add(null);}});
1845	>	}
1846	>	}
1847	>
1848	>	@SuppressWarnings("unchecked")
1849	>	<T> T serialClone(T o) {
1850	>	try {
1851	>	ObjectInputStream ois = new ObjectInputStream
1852	>	(new ByteArrayInputStream(serialBytes(o)));
1853	>	T clone = (T) ois.readObject();
1854	>	if (o == clone) assertImmutable(o);
1855	>	assertSame(o.getClass(), clone.getClass());
1856	>	return clone;
1857	>	} catch (Throwable fail) {
1858	>	threadUnexpectedException(fail);
1859	>	return null;
1860	>	}
1861	>	}
1862	>
1863	>	/**
1864	>	* A version of serialClone that leaves error handling (for
1865	>	* e.g. NotSerializableException) up to the caller.
1866	>	*/
1867	>	@SuppressWarnings("unchecked")
1868	>	<T> T serialClonePossiblyFailing(T o)
1869	>	throws ReflectiveOperationException, java.io.IOException {
1870	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1871	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1872	>	oos.writeObject(o);
1873	>	oos.flush();
1874	>	oos.close();
1875	>	ObjectInputStream ois = new ObjectInputStream
1876	>	(new ByteArrayInputStream(bos.toByteArray()));
1877	>	T clone = (T) ois.readObject();
1878	>	if (o == clone) assertImmutable(o);
1879	>	assertSame(o.getClass(), clone.getClass());
1880	>	return clone;
1881	>	}
1882	>
1883	>	/**
1884	>	* If o implements Cloneable and has a public clone method,
1885	>	* returns a clone of o, else null.
1886	>	*/
1887	>	@SuppressWarnings("unchecked")
1888	>	<T> T cloneableClone(T o) {
1889	>	if (!(o instanceof Cloneable)) return null;
1890	>	final T clone;
1891	>	try {
1892	>	clone = (T) o.getClass().getMethod("clone").invoke(o);
1893	>	} catch (NoSuchMethodException ok) {
1894	>	return null;
1895	>	} catch (ReflectiveOperationException unexpected) {
1896	>	throw new Error(unexpected);
1897	>	}
1898	>	assertNotSame(o, clone); // not 100% guaranteed by spec
1899	>	assertSame(o.getClass(), clone.getClass());
1900	>	return clone;
1901	>	}
1902	>
1903	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1904	>	Runnable... throwingActions) {
1905	>	for (Runnable throwingAction : throwingActions) {
1906	>	boolean threw = false;
1907	>	try { throwingAction.run(); }
1908	>	catch (Throwable t) {
1909	>	threw = true;
1910	>	if (!expectedExceptionClass.isInstance(t)) {
1911	>	AssertionFailedError afe =
1912	>	new AssertionFailedError
1913	>	("Expected " + expectedExceptionClass.getName() +
1914	>	", got " + t.getClass().getName());
1915	>	afe.initCause(t);
1916	>	threadUnexpectedException(afe);
1917	>	}
1918		}
1919	+	if (!threw)
1920	+	shouldThrow(expectedExceptionClass.getName());
1921		}
1922		}
1923	<
1923	>
1924	>	public void assertIteratorExhausted(Iterator<?> it) {
1925	>	try {
1926	>	it.next();
1927	>	shouldThrow();
1928	>	} catch (NoSuchElementException success) {}
1929	>	assertFalse(it.hasNext());
1930	>	}
1931	>
1932	>	public <T> Callable<T> callableThrowing(final Exception ex) {
1933	>	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1934	>	}
1935	>
1936	>	public Runnable runnableThrowing(final RuntimeException ex) {
1937	>	return new Runnable() { public void run() { throw ex; }};
1938	>	}
1939	>
1940	>	/** A reusable thread pool to be shared by tests. */
1941	>	static final ExecutorService cachedThreadPool =
1942	>	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1943	>	1000L, MILLISECONDS,
1944	>	new SynchronousQueue<Runnable>());
1945	>
1946	>	static <T> void shuffle(T[] array) {
1947	>	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1948	>	}
1949		}

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