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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.5 by dl, Fri Sep 26 15:33:13 2003 UTC vs.
Revision 1.156 by jsr166, Sat Oct 3 21:09:42 2015 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.*;
13	<
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	>	import static java.util.concurrent.TimeUnit.MINUTES;
11	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
12	>
13	>	import java.io.ByteArrayInputStream;
14	>	import java.io.ByteArrayOutputStream;
15	>	import java.io.ObjectInputStream;
16	>	import java.io.ObjectOutputStream;
17	>	import java.lang.management.ManagementFactory;
18	>	import java.lang.management.ThreadInfo;
19	>	import java.lang.management.ThreadMXBean;
20	>	import java.lang.reflect.Constructor;
21	>	import java.lang.reflect.Method;
22	>	import java.lang.reflect.Modifier;
23	>	import java.security.CodeSource;
24	>	import java.security.Permission;
25	>	import java.security.PermissionCollection;
26	>	import java.security.Permissions;
27	>	import java.security.Policy;
28	>	import java.security.ProtectionDomain;
29	>	import java.security.SecurityPermission;
30	>	import java.util.ArrayList;
31	>	import java.util.Arrays;
32	>	import java.util.Date;
33	>	import java.util.Enumeration;
34	>	import java.util.Iterator;
35	>	import java.util.List;
36	>	import java.util.NoSuchElementException;
37	>	import java.util.PropertyPermission;
38	>	import java.util.concurrent.BlockingQueue;
39	>	import java.util.concurrent.Callable;
40	>	import java.util.concurrent.CountDownLatch;
41	>	import java.util.concurrent.CyclicBarrier;
42	>	import java.util.concurrent.ExecutionException;
43	>	import java.util.concurrent.Executors;
44	>	import java.util.concurrent.ExecutorService;
45	>	import java.util.concurrent.ForkJoinPool;
46	>	import java.util.concurrent.Future;
47	>	import java.util.concurrent.RecursiveAction;
48	>	import java.util.concurrent.RecursiveTask;
49	>	import java.util.concurrent.RejectedExecutionHandler;
50	>	import java.util.concurrent.Semaphore;
51	>	import java.util.concurrent.ThreadFactory;
52	>	import java.util.concurrent.ThreadPoolExecutor;
53	>	import java.util.concurrent.TimeoutException;
54	>	import java.util.concurrent.atomic.AtomicReference;
55	>	import java.util.regex.Pattern;
56	>
57	>	import junit.framework.AssertionFailedError;
58	>	import junit.framework.Test;
59	>	import junit.framework.TestCase;
60	>	import junit.framework.TestResult;
61	>	import junit.framework.TestSuite;
62
63		/**
64		* Base class for JSR166 Junit TCK tests.  Defines some constants,
65		* utility methods and classes, as well as a simple framework for
66		* helping to make sure that assertions failing in generated threads
67		* cause the associated test that generated them to itself fail (which
68	<	* JUnit doe not otherwise arrange).  The rules for creating such
68	>	* JUnit does not otherwise arrange).  The rules for creating such
69		* tests are:
70		*
71		* <ol>
72		*
73	<	* <li> All assertions in code running in generated threads must use
74	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
75	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
76	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
73	>	* <li>All assertions in code running in generated threads must use
74	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
75	>	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
76	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
77		* particularly recommended) for other code to use these forms too.
78		* Only the most typically used JUnit assertion methods are defined
79	<	* this way, but enough to live with.</li>
79	>	* this way, but enough to live with.
80		*
81	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
82	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
81	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
82	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
83		* them. These methods are used to clear and check for thread
84	<	* assertion failures.</li>
84	>	* assertion failures.
85		*
86	<	* <li>All delays and timeouts must use one of the constants {@link
87	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
88	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
86	>	* <li>All delays and timeouts must use one of the constants {@code
87	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
88	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
89		* discriminable from zero time, and always allows enough time for the
90		* small amounts of computation (creating a thread, calling a few
91		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
92		* is always discriminable as larger than SHORT and smaller than
93		* MEDIUM.  And so on. These constants are set to conservative values,
94		* but even so, if there is ever any doubt, they can all be increased
95	<	* in one spot to rerun tests on slower platforms</li>
95	>	* in one spot to rerun tests on slower platforms.
96		*
97	<	* <li> All threads generated must be joined inside each test case
98	<	* method (or <tt>fail</tt> to do so) before returning from the
99	<	* method. The {@link joinPool} method can be used to do this when
100	<	* using Executors.</li>
97	>	* <li>All threads generated must be joined inside each test case
98	>	* method (or {@code fail} to do so) before returning from the
99	>	* method. The {@code joinPool} method can be used to do this when
100	>	* using Executors.
101		*
102		* </ol>
103	+	*
104	+	* <p><b>Other notes</b>
105	+	* <ul>
106	+	*
107	+	* <li>Usually, there is one testcase method per JSR166 method
108	+	* covering "normal" operation, and then as many exception-testing
109	+	* methods as there are exceptions the method can throw. Sometimes
110	+	* there are multiple tests per JSR166 method when the different
111	+	* "normal" behaviors differ significantly. And sometimes testcases
112	+	* cover multiple methods when they cannot be tested in
113	+	* isolation.
114	+	*
115	+	* <li>The documentation style for testcases is to provide as javadoc
116	+	* a simple sentence or two describing the property that the testcase
117	+	* method purports to test. The javadocs do not say anything about how
118	+	* the property is tested. To find out, read the code.
119	+	*
120	+	* <li>These tests are "conformance tests", and do not attempt to
121	+	* test throughput, latency, scalability or other performance factors
122	+	* (see the separate "jtreg" tests for a set intended to check these
123	+	* for the most central aspects of functionality.) So, most tests use
124	+	* the smallest sensible numbers of threads, collection sizes, etc
125	+	* needed to check basic conformance.
126	+	*
127	+	* <li>The test classes currently do not declare inclusion in
128	+	* any particular package to simplify things for people integrating
129	+	* them in TCK test suites.
130	+	*
131	+	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
132	+	* runs all JSR166 unit tests.
133	+	*
134	+	* </ul>
135		*/
136		public class JSR166TestCase extends TestCase {
137	+	private static final boolean useSecurityManager =
138	+	Boolean.getBoolean("jsr166.useSecurityManager");
139	+
140	+	protected static final boolean expensiveTests =
141	+	Boolean.getBoolean("jsr166.expensiveTests");
142	+
143	+	/**
144	+	* If true, also run tests that are not part of the official tck
145	+	* because they test unspecified implementation details.
146	+	*/
147	+	protected static final boolean testImplementationDetails =
148	+	Boolean.getBoolean("jsr166.testImplementationDetails");
149	+
150	+	/**
151	+	* If true, report on stdout all "slow" tests, that is, ones that
152	+	* take more than profileThreshold milliseconds to execute.
153	+	*/
154	+	private static final boolean profileTests =
155	+	Boolean.getBoolean("jsr166.profileTests");
156	+
157	+	/**
158	+	* The number of milliseconds that tests are permitted for
159	+	* execution without being reported, when profileTests is set.
160	+	*/
161	+	private static final long profileThreshold =
162	+	Long.getLong("jsr166.profileThreshold", 100);
163	+
164	+	/**
165	+	* The number of repetitions per test (for tickling rare bugs).
166	+	*/
167	+	private static final int runsPerTest =
168	+	Integer.getInteger("jsr166.runsPerTest", 1);
169	+
170	+	/**
171	+	* The number of repetitions of the test suite (for finding leaks?).
172	+	*/
173	+	private static final int suiteRuns =
174	+	Integer.getInteger("jsr166.suiteRuns", 1);
175	+
176	+	public JSR166TestCase() { super(); }
177	+	public JSR166TestCase(String name) { super(name); }
178	+
179	+	/**
180	+	* A filter for tests to run, matching strings of the form
181	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
182	+	* Usefully combined with jsr166.runsPerTest.
183	+	*/
184	+	private static final Pattern methodFilter = methodFilter();
185	+
186	+	private static Pattern methodFilter() {
187	+	String regex = System.getProperty("jsr166.methodFilter");
188	+	return (regex == null) ? null : Pattern.compile(regex);
189	+	}
190	+
191	+	static volatile TestCase currentTestCase;
192	+	static {
193	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
194	+	for (TestCase lastTestCase = currentTestCase;;) {
195	+	try { MINUTES.sleep(10); }
196	+	catch (InterruptedException unexpected) { break; }
197	+	if (lastTestCase == currentTestCase) {
198	+	System.err.println
199	+	("Looks like we're stuck running test: "
200	+	+ lastTestCase);
201	+	dumpTestThreads();
202	+	}
203	+	lastTestCase = currentTestCase;
204	+	}}};
205	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
206	+	thread.setDaemon(true);
207	+	thread.start();
208	+	}
209	+
210	+	public void runBare() throws Throwable {
211	+	currentTestCase = this;
212	+	if (methodFilter == null
213	+	|| methodFilter.matcher(toString()).find())
214	+	super.runBare();
215	+	}
216	+
217	+	protected void runTest() throws Throwable {
218	+	for (int i = 0; i < runsPerTest; i++) {
219	+	if (profileTests)
220	+	runTestProfiled();
221	+	else
222	+	super.runTest();
223	+	}
224	+	}
225	+
226	+	protected void runTestProfiled() throws Throwable {
227	+	for (int i = 0; i < 2; i++) {
228	+	long startTime = System.nanoTime();
229	+	super.runTest();
230	+	long elapsedMillis = millisElapsedSince(startTime);
231	+	if (elapsedMillis < profileThreshold)
232	+	break;
233	+	// Never report first run of any test; treat it as a
234	+	// warmup run, notably to trigger all needed classloading,
235	+	if (i > 0)
236	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
237	+	}
238	+	}
239	+
240	+	/**
241	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
242	+	*/
243	+	public static void main(String[] args) {
244	+	main(suite(), args);
245	+	}
246	+
247	+	/**
248	+	* Runs all unit tests in the given test suite.
249	+	* Actual behavior influenced by jsr166.* system properties.
250	+	*/
251	+	static void main(Test suite, String[] args) {
252	+	if (useSecurityManager) {
253	+	System.err.println("Setting a permissive security manager");
254	+	Policy.setPolicy(permissivePolicy());
255	+	System.setSecurityManager(new SecurityManager());
256	+	}
257	+	for (int i = 0; i < suiteRuns; i++) {
258	+	TestResult result = junit.textui.TestRunner.run(suite);
259	+	if (!result.wasSuccessful())
260	+	System.exit(1);
261	+	System.gc();
262	+	System.runFinalization();
263	+	}
264	+	}
265	+
266	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
267	+	TestSuite suite = new TestSuite();
268	+	for (Object suiteOrClass : suiteOrClasses) {
269	+	if (suiteOrClass instanceof TestSuite)
270	+	suite.addTest((TestSuite) suiteOrClass);
271	+	else if (suiteOrClass instanceof Class)
272	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
273	+	else
274	+	throw new ClassCastException("not a test suite or class");
275	+	}
276	+	return suite;
277	+	}
278	+
279	+	public static void addNamedTestClasses(TestSuite suite,
280	+	String... testClassNames) {
281	+	for (String testClassName : testClassNames) {
282	+	try {
283	+	Class<?> testClass = Class.forName(testClassName);
284	+	Method m = testClass.getDeclaredMethod("suite",
285	+	new Class<?>[0]);
286	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
287	+	} catch (Exception e) {
288	+	throw new Error("Missing test class", e);
289	+	}
290	+	}
291	+	}
292	+
293	+	public static final double JAVA_CLASS_VERSION;
294	+	public static final String JAVA_SPECIFICATION_VERSION;
295	+	static {
296	+	try {
297	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
298	+	new java.security.PrivilegedAction<Double>() {
299	+	public Double run() {
300	+	return Double.valueOf(System.getProperty("java.class.version"));}});
301	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
302	+	new java.security.PrivilegedAction<String>() {
303	+	public String run() {
304	+	return System.getProperty("java.specification.version");}});
305	+	} catch (Throwable t) {
306	+	throw new Error(t);
307	+	}
308	+	}
309	+
310	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
311	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
312	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
313	+	public static boolean atLeastJava9() {
314	+	return JAVA_CLASS_VERSION >= 53.0
315	+	// As of 2015-09, java9 still uses 52.0 class file version
316	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
317	+	}
318	+	public static boolean atLeastJava10() {
319	+	return JAVA_CLASS_VERSION >= 54.0
320	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
321	+	}
322	+
323	+	/**
324	+	* Collects all JSR166 unit tests as one suite.
325	+	*/
326	+	public static Test suite() {
327	+	// Java7+ test classes
328	+	TestSuite suite = newTestSuite(
329	+	ForkJoinPoolTest.suite(),
330	+	ForkJoinTaskTest.suite(),
331	+	RecursiveActionTest.suite(),
332	+	RecursiveTaskTest.suite(),
333	+	LinkedTransferQueueTest.suite(),
334	+	PhaserTest.suite(),
335	+	ThreadLocalRandomTest.suite(),
336	+	AbstractExecutorServiceTest.suite(),
337	+	AbstractQueueTest.suite(),
338	+	AbstractQueuedSynchronizerTest.suite(),
339	+	AbstractQueuedLongSynchronizerTest.suite(),
340	+	ArrayBlockingQueueTest.suite(),
341	+	ArrayDequeTest.suite(),
342	+	AtomicBooleanTest.suite(),
343	+	AtomicIntegerArrayTest.suite(),
344	+	AtomicIntegerFieldUpdaterTest.suite(),
345	+	AtomicIntegerTest.suite(),
346	+	AtomicLongArrayTest.suite(),
347	+	AtomicLongFieldUpdaterTest.suite(),
348	+	AtomicLongTest.suite(),
349	+	AtomicMarkableReferenceTest.suite(),
350	+	AtomicReferenceArrayTest.suite(),
351	+	AtomicReferenceFieldUpdaterTest.suite(),
352	+	AtomicReferenceTest.suite(),
353	+	AtomicStampedReferenceTest.suite(),
354	+	ConcurrentHashMapTest.suite(),
355	+	ConcurrentLinkedDequeTest.suite(),
356	+	ConcurrentLinkedQueueTest.suite(),
357	+	ConcurrentSkipListMapTest.suite(),
358	+	ConcurrentSkipListSubMapTest.suite(),
359	+	ConcurrentSkipListSetTest.suite(),
360	+	ConcurrentSkipListSubSetTest.suite(),
361	+	CopyOnWriteArrayListTest.suite(),
362	+	CopyOnWriteArraySetTest.suite(),
363	+	CountDownLatchTest.suite(),
364	+	CyclicBarrierTest.suite(),
365	+	DelayQueueTest.suite(),
366	+	EntryTest.suite(),
367	+	ExchangerTest.suite(),
368	+	ExecutorsTest.suite(),
369	+	ExecutorCompletionServiceTest.suite(),
370	+	FutureTaskTest.suite(),
371	+	LinkedBlockingDequeTest.suite(),
372	+	LinkedBlockingQueueTest.suite(),
373	+	LinkedListTest.suite(),
374	+	LockSupportTest.suite(),
375	+	PriorityBlockingQueueTest.suite(),
376	+	PriorityQueueTest.suite(),
377	+	ReentrantLockTest.suite(),
378	+	ReentrantReadWriteLockTest.suite(),
379	+	ScheduledExecutorTest.suite(),
380	+	ScheduledExecutorSubclassTest.suite(),
381	+	SemaphoreTest.suite(),
382	+	SynchronousQueueTest.suite(),
383	+	SystemTest.suite(),
384	+	ThreadLocalTest.suite(),
385	+	ThreadPoolExecutorTest.suite(),
386	+	ThreadPoolExecutorSubclassTest.suite(),
387	+	ThreadTest.suite(),
388	+	TimeUnitTest.suite(),
389	+	TreeMapTest.suite(),
390	+	TreeSetTest.suite(),
391	+	TreeSubMapTest.suite(),
392	+	TreeSubSetTest.suite());
393	+
394	+	// Java8+ test classes
395	+	if (atLeastJava8()) {
396	+	String[] java8TestClassNames = {
397	+	"Atomic8Test",
398	+	"CompletableFutureTest",
399	+	"ConcurrentHashMap8Test",
400	+	"CountedCompleterTest",
401	+	"DoubleAccumulatorTest",
402	+	"DoubleAdderTest",
403	+	"ForkJoinPool8Test",
404	+	"ForkJoinTask8Test",
405	+	"LongAccumulatorTest",
406	+	"LongAdderTest",
407	+	"SplittableRandomTest",
408	+	"StampedLockTest",
409	+	"SubmissionPublisherTest",
410	+	"ThreadLocalRandom8Test",
411	+	};
412	+	addNamedTestClasses(suite, java8TestClassNames);
413	+	}
414	+
415	+	// Java9+ test classes
416	+	if (atLeastJava9()) {
417	+	String[] java9TestClassNames = {
418	+	// Currently empty, but expecting varhandle tests
419	+	};
420	+	addNamedTestClasses(suite, java9TestClassNames);
421	+	}
422	+
423	+	return suite;
424	+	}
425	+
426	+	/** Returns list of junit-style test method names in given class. */
427	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
428	+	Method[] methods = testClass.getDeclaredMethods();
429	+	ArrayList<String> names = new ArrayList<String>(methods.length);
430	+	for (Method method : methods) {
431	+	if (method.getName().startsWith("test")
432	+	&& Modifier.isPublic(method.getModifiers())
433	+	// method.getParameterCount() requires jdk8+
434	+	&& method.getParameterTypes().length == 0) {
435	+	names.add(method.getName());
436	+	}
437	+	}
438	+	return names;
439	+	}
440	+
441	+	/**
442	+	* Returns junit-style testSuite for the given test class, but
443	+	* parameterized by passing extra data to each test.
444	+	*/
445	+	public static <ExtraData> Test parameterizedTestSuite
446	+	(Class<? extends JSR166TestCase> testClass,
447	+	Class<ExtraData> dataClass,
448	+	ExtraData data) {
449	+	try {
450	+	TestSuite suite = new TestSuite();
451	+	Constructor c =
452	+	testClass.getDeclaredConstructor(dataClass, String.class);
453	+	for (String methodName : testMethodNames(testClass))
454	+	suite.addTest((Test) c.newInstance(data, methodName));
455	+	return suite;
456	+	} catch (Exception e) {
457	+	throw new Error(e);
458	+	}
459	+	}
460	+
461	+	/**
462	+	* Returns junit-style testSuite for the jdk8 extension of the
463	+	* given test class, but parameterized by passing extra data to
464	+	* each test.  Uses reflection to allow compilation in jdk7.
465	+	*/
466	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
467	+	(Class<? extends JSR166TestCase> testClass,
468	+	Class<ExtraData> dataClass,
469	+	ExtraData data) {
470	+	if (atLeastJava8()) {
471	+	String name = testClass.getName();
472	+	String name8 = name.replaceAll("Test$", "8Test");
473	+	if (name.equals(name8)) throw new Error(name);
474	+	try {
475	+	return (Test)
476	+	Class.forName(name8)
477	+	.getMethod("testSuite", new Class[] { dataClass })
478	+	.invoke(null, data);
479	+	} catch (Exception e) {
480	+	throw new Error(e);
481	+	}
482	+	} else {
483	+	return new TestSuite();
484	+	}
485	+	}
486	+
487	+	// Delays for timing-dependent tests, in milliseconds.
488
489		public static long SHORT_DELAY_MS;
490		public static long SMALL_DELAY_MS;
491		public static long MEDIUM_DELAY_MS;
492		public static long LONG_DELAY_MS;
493
62	–
494		/**
495	<	* Return the shortest timed delay. This could
496	<	* be reimplmented to use for example a Property.
497	<	*/
495	>	* Returns the shortest timed delay. This could
496	>	* be reimplemented to use for example a Property.
497	>	*/
498		protected long getShortDelay() {
499	<	return 100;
499	>	return 50;
500		}
501
71	–
502		/**
503	<	* Set delays as multiples of SHORT_DELAY.
503	>	* Sets delays as multiples of SHORT_DELAY.
504		*/
505	<	protected  void setDelays() {
505	>	protected void setDelays() {
506		SHORT_DELAY_MS = getShortDelay();
507	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
507	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
508		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
509	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
509	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
510		}
511
512		/**
513	<	* Flag set true if any threadAssert methods fail
513	>	* Returns a timeout in milliseconds to be used in tests that
514	>	* verify that operations block or time out.
515		*/
516	<	volatile boolean threadFailed;
516	>	long timeoutMillis() {
517	>	return SHORT_DELAY_MS / 4;
518	>	}
519
520		/**
521	<	* Initialize test to indicate that no thread assertions have failed
521	>	* Returns a new Date instance representing a time at least
522	>	* delayMillis milliseconds in the future.
523		*/
524	<	public void setUp() {
524	>	Date delayedDate(long delayMillis) {
525	>	// Add 1 because currentTimeMillis is known to round into the past.
526	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
527	>	}
528	>
529	>	/**
530	>	* The first exception encountered if any threadAssertXXX method fails.
531	>	*/
532	>	private final AtomicReference<Throwable> threadFailure
533	>	= new AtomicReference<Throwable>(null);
534	>
535	>	/**
536	>	* Records an exception so that it can be rethrown later in the test
537	>	* harness thread, triggering a test case failure.  Only the first
538	>	* failure is recorded; subsequent calls to this method from within
539	>	* the same test have no effect.
540	>	*/
541	>	public void threadRecordFailure(Throwable t) {
542	>	dumpTestThreads();
543	>	threadFailure.compareAndSet(null, t);
544	>	}
545	>
546	>	public void setUp() {
547		setDelays();
548	<	threadFailed = false;
548	>	}
549	>
550	>	void tearDownFail(String format, Object... args) {
551	>	String msg = toString() + ": " + String.format(format, args);
552	>	System.err.println(msg);
553	>	dumpTestThreads();
554	>	throw new AssertionFailedError(msg);
555	>	}
556	>
557	>	/**
558	>	* Extra checks that get done for all test cases.
559	>	*
560	>	* Triggers test case failure if any thread assertions have failed,
561	>	* by rethrowing, in the test harness thread, any exception recorded
562	>	* earlier by threadRecordFailure.
563	>	*
564	>	* Triggers test case failure if interrupt status is set in the main thread.
565	>	*/
566	>	public void tearDown() throws Exception {
567	>	Throwable t = threadFailure.getAndSet(null);
568	>	if (t != null) {
569	>	if (t instanceof Error)
570	>	throw (Error) t;
571	>	else if (t instanceof RuntimeException)
572	>	throw (RuntimeException) t;
573	>	else if (t instanceof Exception)
574	>	throw (Exception) t;
575	>	else {
576	>	AssertionFailedError afe =
577	>	new AssertionFailedError(t.toString());
578	>	afe.initCause(t);
579	>	throw afe;
580	>	}
581	>	}
582	>
583	>	if (Thread.interrupted())
584	>	tearDownFail("interrupt status set in main thread");
585	>
586	>	checkForkJoinPoolThreadLeaks();
587		}
588
589		/**
590	<	* Trigger test case failure if any thread assertions have failed
590	>	* Finds missing try { ... } finally { joinPool(e); }
591		*/
592	<	public void tearDown() {
593	<	assertFalse(threadFailed);
592	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
593	>	Thread[] survivors = new Thread[7];
594	>	int count = Thread.enumerate(survivors);
595	>	for (int i = 0; i < count; i++) {
596	>	Thread thread = survivors[i];
597	>	String name = thread.getName();
598	>	if (name.startsWith("ForkJoinPool-")) {
599	>	// give thread some time to terminate
600	>	thread.join(LONG_DELAY_MS);
601	>	if (thread.isAlive())
602	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
603	>	thread);
604	>	}
605	>	}
606	>
607	>	if (!ForkJoinPool.commonPool()
608	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
609	>	tearDownFail("ForkJoin common pool thread stuck");
610		}
611
612		/**
613	<	* Fail, also setting status to indicate current testcase should fail
614	<	*/
613	>	* Just like fail(reason), but additionally recording (using
614	>	* threadRecordFailure) any AssertionFailedError thrown, so that
615	>	* the current testcase will fail.
616	>	*/
617		public void threadFail(String reason) {
618	<	threadFailed = true;
619	<	fail(reason);
618	>	try {
619	>	fail(reason);
620	>	} catch (AssertionFailedError t) {
621	>	threadRecordFailure(t);
622	>	throw t;
623	>	}
624		}
625
626		/**
627	<	* If expression not true, set status to indicate current testcase
628	<	* should fail
629	<	*/
627	>	* Just like assertTrue(b), but additionally recording (using
628	>	* threadRecordFailure) any AssertionFailedError thrown, so that
629	>	* the current testcase will fail.
630	>	*/
631		public void threadAssertTrue(boolean b) {
632	<	if (!b) {
116	<	threadFailed = true;
632	>	try {
633		assertTrue(b);
634	+	} catch (AssertionFailedError t) {
635	+	threadRecordFailure(t);
636	+	throw t;
637		}
638		}
639
640		/**
641	<	* If expression not false, set status to indicate current testcase
642	<	* should fail
643	<	*/
641	>	* Just like assertFalse(b), but additionally recording (using
642	>	* threadRecordFailure) any AssertionFailedError thrown, so that
643	>	* the current testcase will fail.
644	>	*/
645		public void threadAssertFalse(boolean b) {
646	<	if (b) {
127	<	threadFailed = true;
646	>	try {
647		assertFalse(b);
648	+	} catch (AssertionFailedError t) {
649	+	threadRecordFailure(t);
650	+	throw t;
651		}
652		}
653
654		/**
655	<	* If argument not null, set status to indicate current testcase
656	<	* should fail
657	<	*/
655	>	* Just like assertNull(x), but additionally recording (using
656	>	* threadRecordFailure) any AssertionFailedError thrown, so that
657	>	* the current testcase will fail.
658	>	*/
659		public void threadAssertNull(Object x) {
660	<	if (x != null) {
138	<	threadFailed = true;
660	>	try {
661		assertNull(x);
662	+	} catch (AssertionFailedError t) {
663	+	threadRecordFailure(t);
664	+	throw t;
665		}
666		}
667
668		/**
669	<	* If arguments not equal, set status to indicate current testcase
670	<	* should fail
671	<	*/
669	>	* Just like assertEquals(x, y), but additionally recording (using
670	>	* threadRecordFailure) any AssertionFailedError thrown, so that
671	>	* the current testcase will fail.
672	>	*/
673		public void threadAssertEquals(long x, long y) {
674	<	if (x != y) {
149	<	threadFailed = true;
674	>	try {
675		assertEquals(x, y);
676	+	} catch (AssertionFailedError t) {
677	+	threadRecordFailure(t);
678	+	throw t;
679		}
680		}
681
682		/**
683	<	* If arguments not equal, set status to indicate current testcase
684	<	* should fail
685	<	*/
683	>	* Just like assertEquals(x, y), but additionally recording (using
684	>	* threadRecordFailure) any AssertionFailedError thrown, so that
685	>	* the current testcase will fail.
686	>	*/
687		public void threadAssertEquals(Object x, Object y) {
688	<	if (x != y && (x == null || !x.equals(y))) {
160	<	threadFailed = true;
688	>	try {
689		assertEquals(x, y);
690	+	} catch (AssertionFailedError fail) {
691	+	threadRecordFailure(fail);
692	+	throw fail;
693	+	} catch (Throwable fail) {
694	+	threadUnexpectedException(fail);
695	+	}
696	+	}
697	+
698	+	/**
699	+	* Just like assertSame(x, y), but additionally recording (using
700	+	* threadRecordFailure) any AssertionFailedError thrown, so that
701	+	* the current testcase will fail.
702	+	*/
703	+	public void threadAssertSame(Object x, Object y) {
704	+	try {
705	+	assertSame(x, y);
706	+	} catch (AssertionFailedError fail) {
707	+	threadRecordFailure(fail);
708	+	throw fail;
709		}
710		}
711
712		/**
713	<	* threadFail with message "should throw exception"
714	<	*/
713	>	* Calls threadFail with message "should throw exception".
714	>	*/
715		public void threadShouldThrow() {
716	<	threadFailed = true;
170	<	fail("should throw exception");
716	>	threadFail("should throw exception");
717		}
718
719		/**
720	<	* threadFail with message "Unexpected exception"
720	>	* Calls threadFail with message "should throw" + exceptionName.
721		*/
722	<	public void threadUnexpectedException() {
723	<	threadFailed = true;
178	<	fail("Unexpected exception");
722	>	public void threadShouldThrow(String exceptionName) {
723	>	threadFail("should throw " + exceptionName);
724		}
725
726	+	/**
727	+	* Records the given exception using {@link #threadRecordFailure},
728	+	* then rethrows the exception, wrapping it in an
729	+	* AssertionFailedError if necessary.
730	+	*/
731	+	public void threadUnexpectedException(Throwable t) {
732	+	threadRecordFailure(t);
733	+	t.printStackTrace();
734	+	if (t instanceof RuntimeException)
735	+	throw (RuntimeException) t;
736	+	else if (t instanceof Error)
737	+	throw (Error) t;
738	+	else {
739	+	AssertionFailedError afe =
740	+	new AssertionFailedError("unexpected exception: " + t);
741	+	afe.initCause(t);
742	+	throw afe;
743	+	}
744	+	}
745	+
746	+	/**
747	+	* Delays, via Thread.sleep, for the given millisecond delay, but
748	+	* if the sleep is shorter than specified, may re-sleep or yield
749	+	* until time elapses.
750	+	*/
751	+	static void delay(long millis) throws InterruptedException {
752	+	long startTime = System.nanoTime();
753	+	long ns = millis * 1000 * 1000;
754	+	for (;;) {
755	+	if (millis > 0L)
756	+	Thread.sleep(millis);
757	+	else // too short to sleep
758	+	Thread.yield();
759	+	long d = ns - (System.nanoTime() - startTime);
760	+	if (d > 0L)
761	+	millis = d / (1000 * 1000);
762	+	else
763	+	break;
764	+	}
765	+	}
766	+
767	+	/**
768	+	* Allows use of try-with-resources with per-test thread pools.
769	+	*/
770	+	static class PoolCloser<T extends ExecutorService>
771	+	implements AutoCloseable {
772	+	public final T pool;
773	+	public PoolCloser(T pool) { this.pool = pool; }
774	+	public void close() { joinPool(pool); }
775	+	}
776
777		/**
778	<	* Wait out termination of a thread pool or fail doing so
778	>	* Waits out termination of a thread pool or fails doing so.
779		*/
780	<	public void joinPool(ExecutorService exec) {
780	>	static void joinPool(ExecutorService pool) {
781		try {
782	<	exec.shutdown();
783	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
784	<	} catch(InterruptedException ie) {
785	<	fail("Unexpected exception");
782	>	pool.shutdown();
783	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS))
784	>	fail("ExecutorService " + pool +
785	>	" did not terminate in a timely manner");
786	>	} catch (SecurityException ok) {
787	>	// Allowed in case test doesn't have privs
788	>	} catch (InterruptedException fail) {
789	>	fail("Unexpected InterruptedException");
790		}
791		}
792
793	+	/** Like Runnable, but with the freedom to throw anything */
794	+	interface Action { public void run() throws Throwable; }
795
796		/**
797	<	* fail with message "should throw exception"
798	<	*/
797	>	* Runs all the given actions in parallel, failing if any fail.
798	>	* Useful for running multiple variants of tests that are
799	>	* necessarily individually slow because they must block.
800	>	*/
801	>	void testInParallel(Action ... actions) {
802	>	try (PoolCloser<ExecutorService> poolCloser
803	>	= new PoolCloser<>(Executors.newCachedThreadPool())) {
804	>	ExecutorService pool = poolCloser.pool;
805	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
806	>	for (final Action action : actions)
807	>	futures.add(pool.submit(new CheckedRunnable() {
808	>	public void realRun() throws Throwable { action.run();}}));
809	>	for (Future<?> future : futures)
810	>	try {
811	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
812	>	} catch (ExecutionException ex) {
813	>	threadUnexpectedException(ex.getCause());
814	>	} catch (Exception ex) {
815	>	threadUnexpectedException(ex);
816	>	}
817	>	}
818	>	}
819	>
820	>	/**
821	>	* A debugging tool to print stack traces of most threads, as jstack does.
822	>	* Uninteresting threads are filtered out.
823	>	*/
824	>	static void dumpTestThreads() {
825	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
826	>	System.err.println("------ stacktrace dump start ------");
827	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
828	>	String name = info.getThreadName();
829	>	if ("Signal Dispatcher".equals(name))
830	>	continue;
831	>	if ("Reference Handler".equals(name)
832	>	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
833	>	continue;
834	>	if ("Finalizer".equals(name)
835	>	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
836	>	continue;
837	>	if ("checkForWedgedTest".equals(name))
838	>	continue;
839	>	System.err.print(info);
840	>	}
841	>	System.err.println("------ stacktrace dump end ------");
842	>	}
843	>
844	>	/**
845	>	* Checks that thread does not terminate within the default
846	>	* millisecond delay of {@code timeoutMillis()}.
847	>	*/
848	>	void assertThreadStaysAlive(Thread thread) {
849	>	assertThreadStaysAlive(thread, timeoutMillis());
850	>	}
851	>
852	>	/**
853	>	* Checks that thread does not terminate within the given millisecond delay.
854	>	*/
855	>	void assertThreadStaysAlive(Thread thread, long millis) {
856	>	try {
857	>	// No need to optimize the failing case via Thread.join.
858	>	delay(millis);
859	>	assertTrue(thread.isAlive());
860	>	} catch (InterruptedException fail) {
861	>	fail("Unexpected InterruptedException");
862	>	}
863	>	}
864	>
865	>	/**
866	>	* Checks that the threads do not terminate within the default
867	>	* millisecond delay of {@code timeoutMillis()}.
868	>	*/
869	>	void assertThreadsStayAlive(Thread... threads) {
870	>	assertThreadsStayAlive(timeoutMillis(), threads);
871	>	}
872	>
873	>	/**
874	>	* Checks that the threads do not terminate within the given millisecond delay.
875	>	*/
876	>	void assertThreadsStayAlive(long millis, Thread... threads) {
877	>	try {
878	>	// No need to optimize the failing case via Thread.join.
879	>	delay(millis);
880	>	for (Thread thread : threads)
881	>	assertTrue(thread.isAlive());
882	>	} catch (InterruptedException fail) {
883	>	fail("Unexpected InterruptedException");
884	>	}
885	>	}
886	>
887	>	/**
888	>	* Checks that future.get times out, with the default timeout of
889	>	* {@code timeoutMillis()}.
890	>	*/
891	>	void assertFutureTimesOut(Future future) {
892	>	assertFutureTimesOut(future, timeoutMillis());
893	>	}
894	>
895	>	/**
896	>	* Checks that future.get times out, with the given millisecond timeout.
897	>	*/
898	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
899	>	long startTime = System.nanoTime();
900	>	try {
901	>	future.get(timeoutMillis, MILLISECONDS);
902	>	shouldThrow();
903	>	} catch (TimeoutException success) {
904	>	} catch (Exception fail) {
905	>	threadUnexpectedException(fail);
906	>	} finally { future.cancel(true); }
907	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
908	>	}
909	>
910	>	/**
911	>	* Fails with message "should throw exception".
912	>	*/
913		public void shouldThrow() {
914		fail("Should throw exception");
915		}
916
917		/**
918	<	* fail with message "Unexpected exception"
918	>	* Fails with message "should throw " + exceptionName.
919		*/
920	<	public void unexpectedException() {
921	<	fail("Unexpected exception");
920	>	public void shouldThrow(String exceptionName) {
921	>	fail("Should throw " + exceptionName);
922		}
923
209	–
924		/**
925		* The number of elements to place in collections, arrays, etc.
926		*/
927	<	static final int SIZE = 20;
927	>	public static final int SIZE = 20;
928
929		// Some convenient Integer constants
930
931	<	static final Integer zero = new Integer(0);
932	<	static final Integer one = new Integer(1);
933	<	static final Integer two = new Integer(2);
934	<	static final Integer three  = new Integer(3);
935	<	static final Integer four  = new Integer(4);
936	<	static final Integer five  = new Integer(5);
937	<	static final Integer six = new Integer(6);
938	<	static final Integer seven = new Integer(7);
939	<	static final Integer eight = new Integer(8);
940	<	static final Integer nine = new Integer(9);
941	<	static final Integer m1  = new Integer(-1);
942	<	static final Integer m2  = new Integer(-2);
943	<	static final Integer m3  = new Integer(-3);
944	<	static final Integer m4 = new Integer(-4);
945	<	static final Integer m5 = new Integer(-5);
946	<	static final Integer m10 = new Integer(-10);
931	>	public static final Integer zero  = new Integer(0);
932	>	public static final Integer one   = new Integer(1);
933	>	public static final Integer two   = new Integer(2);
934	>	public static final Integer three = new Integer(3);
935	>	public static final Integer four  = new Integer(4);
936	>	public static final Integer five  = new Integer(5);
937	>	public static final Integer six   = new Integer(6);
938	>	public static final Integer seven = new Integer(7);
939	>	public static final Integer eight = new Integer(8);
940	>	public static final Integer nine  = new Integer(9);
941	>	public static final Integer m1  = new Integer(-1);
942	>	public static final Integer m2  = new Integer(-2);
943	>	public static final Integer m3  = new Integer(-3);
944	>	public static final Integer m4  = new Integer(-4);
945	>	public static final Integer m5  = new Integer(-5);
946	>	public static final Integer m6  = new Integer(-6);
947	>	public static final Integer m10 = new Integer(-10);
948
949	+	/**
950	+	* Runs Runnable r with a security policy that permits precisely
951	+	* the specified permissions.  If there is no current security
952	+	* manager, the runnable is run twice, both with and without a
953	+	* security manager.  We require that any security manager permit
954	+	* getPolicy/setPolicy.
955	+	*/
956	+	public void runWithPermissions(Runnable r, Permission... permissions) {
957	+	SecurityManager sm = System.getSecurityManager();
958	+	if (sm == null) {
959	+	r.run();
960	+	}
961	+	runWithSecurityManagerWithPermissions(r, permissions);
962	+	}
963
964	<	// Some convenient Runnable classes
964	>	/**
965	>	* Runs Runnable r with a security policy that permits precisely
966	>	* the specified permissions.  If there is no current security
967	>	* manager, a temporary one is set for the duration of the
968	>	* Runnable.  We require that any security manager permit
969	>	* getPolicy/setPolicy.
970	>	*/
971	>	public void runWithSecurityManagerWithPermissions(Runnable r,
972	>	Permission... permissions) {
973	>	SecurityManager sm = System.getSecurityManager();
974	>	if (sm == null) {
975	>	Policy savedPolicy = Policy.getPolicy();
976	>	try {
977	>	Policy.setPolicy(permissivePolicy());
978	>	System.setSecurityManager(new SecurityManager());
979	>	runWithSecurityManagerWithPermissions(r, permissions);
980	>	} finally {
981	>	System.setSecurityManager(null);
982	>	Policy.setPolicy(savedPolicy);
983	>	}
984	>	} else {
985	>	Policy savedPolicy = Policy.getPolicy();
986	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
987	>	Policy.setPolicy(policy);
988
989	<	static class NoOpRunnable implements Runnable {
990	<	public void run() {}
989	>	try {
990	>	r.run();
991	>	} finally {
992	>	policy.addPermission(new SecurityPermission("setPolicy"));
993	>	Policy.setPolicy(savedPolicy);
994	>	}
995	>	}
996		}
997
998	<	static class NoOpCallable implements Callable {
999	<	public Object call() { return Boolean.TRUE; }
998	>	/**
999	>	* Runs a runnable without any permissions.
1000	>	*/
1001	>	public void runWithoutPermissions(Runnable r) {
1002	>	runWithPermissions(r);
1003		}
1004
1005	<	class ShortRunnable implements Runnable {
1006	<	public void run() {
1007	<	try {
1008	<	Thread.sleep(SHORT_DELAY_MS);
1005	>	/**
1006	>	* A security policy where new permissions can be dynamically added
1007	>	* or all cleared.
1008	>	*/
1009	>	public static class AdjustablePolicy extends java.security.Policy {
1010	>	Permissions perms = new Permissions();
1011	>	AdjustablePolicy(Permission... permissions) {
1012	>	for (Permission permission : permissions)
1013	>	perms.add(permission);
1014	>	}
1015	>	void addPermission(Permission perm) { perms.add(perm); }
1016	>	void clearPermissions() { perms = new Permissions(); }
1017	>	public PermissionCollection getPermissions(CodeSource cs) {
1018	>	return perms;
1019	>	}
1020	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1021	>	return perms;
1022	>	}
1023	>	public boolean implies(ProtectionDomain pd, Permission p) {
1024	>	return perms.implies(p);
1025	>	}
1026	>	public void refresh() {}
1027	>	public String toString() {
1028	>	List<Permission> ps = new ArrayList<Permission>();
1029	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1030	>	ps.add(e.nextElement());
1031	>	return "AdjustablePolicy with permissions " + ps;
1032	>	}
1033	>	}
1034	>
1035	>	/**
1036	>	* Returns a policy containing all the permissions we ever need.
1037	>	*/
1038	>	public static Policy permissivePolicy() {
1039	>	return new AdjustablePolicy
1040	>	// Permissions j.u.c. needs directly
1041	>	(new RuntimePermission("modifyThread"),
1042	>	new RuntimePermission("getClassLoader"),
1043	>	new RuntimePermission("setContextClassLoader"),
1044	>	// Permissions needed to change permissions!
1045	>	new SecurityPermission("getPolicy"),
1046	>	new SecurityPermission("setPolicy"),
1047	>	new RuntimePermission("setSecurityManager"),
1048	>	// Permissions needed by the junit test harness
1049	>	new RuntimePermission("accessDeclaredMembers"),
1050	>	new PropertyPermission("*", "read"),
1051	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1052	>	}
1053	>
1054	>	/**
1055	>	* Sleeps until the given time has elapsed.
1056	>	* Throws AssertionFailedError if interrupted.
1057	>	*/
1058	>	void sleep(long millis) {
1059	>	try {
1060	>	delay(millis);
1061	>	} catch (InterruptedException fail) {
1062	>	AssertionFailedError afe =
1063	>	new AssertionFailedError("Unexpected InterruptedException");
1064	>	afe.initCause(fail);
1065	>	throw afe;
1066	>	}
1067	>	}
1068	>
1069	>	/**
1070	>	* Spin-waits up to the specified number of milliseconds for the given
1071	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1072	>	*/
1073	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1074	>	long startTime = System.nanoTime();
1075	>	for (;;) {
1076	>	Thread.State s = thread.getState();
1077	>	if (s == Thread.State.BLOCKED ||
1078	>	s == Thread.State.WAITING ||
1079	>	s == Thread.State.TIMED_WAITING)
1080	>	return;
1081	>	else if (s == Thread.State.TERMINATED)
1082	>	fail("Unexpected thread termination");
1083	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1084	>	threadAssertTrue(thread.isAlive());
1085	>	return;
1086		}
1087	<	catch(Exception e) {
1088	<	threadUnexpectedException();
1087	>	Thread.yield();
1088	>	}
1089	>	}
1090	>
1091	>	/**
1092	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1093	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1094	>	*/
1095	>	void waitForThreadToEnterWaitState(Thread thread) {
1096	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1097	>	}
1098	>
1099	>	/**
1100	>	* Returns the number of milliseconds since time given by
1101	>	* startNanoTime, which must have been previously returned from a
1102	>	* call to {@link System#nanoTime()}.
1103	>	*/
1104	>	static long millisElapsedSince(long startNanoTime) {
1105	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1106	>	}
1107	>
1108	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1109	>	//         long startTime = System.nanoTime();
1110	>	//         try {
1111	>	//             r.run();
1112	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1113	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1114	>	//             throw new AssertionFailedError("did not return promptly");
1115	>	//     }
1116	>
1117	>	//     void assertTerminatesPromptly(Runnable r) {
1118	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1119	>	//     }
1120	>
1121	>	/**
1122	>	* Checks that timed f.get() returns the expected value, and does not
1123	>	* wait for the timeout to elapse before returning.
1124	>	*/
1125	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1126	>	long startTime = System.nanoTime();
1127	>	try {
1128	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1129	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1130	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1131	>	throw new AssertionFailedError("timed get did not return promptly");
1132	>	}
1133	>
1134	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1135	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1136	>	}
1137	>
1138	>	/**
1139	>	* Returns a new started daemon Thread running the given runnable.
1140	>	*/
1141	>	Thread newStartedThread(Runnable runnable) {
1142	>	Thread t = new Thread(runnable);
1143	>	t.setDaemon(true);
1144	>	t.start();
1145	>	return t;
1146	>	}
1147	>
1148	>	/**
1149	>	* Waits for the specified time (in milliseconds) for the thread
1150	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1151	>	* the thread (in the hope that it may terminate later) and fails.
1152	>	*/
1153	>	void awaitTermination(Thread t, long timeoutMillis) {
1154	>	try {
1155	>	t.join(timeoutMillis);
1156	>	} catch (InterruptedException fail) {
1157	>	threadUnexpectedException(fail);
1158	>	} finally {
1159	>	if (t.getState() != Thread.State.TERMINATED) {
1160	>	t.interrupt();
1161	>	fail("Test timed out");
1162		}
1163		}
1164		}
1165
1166	<	class ShortInterruptedRunnable implements Runnable {
1167	<	public void run() {
1166	>	/**
1167	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1168	>	* terminate (using {@link Thread#join(long)}), else interrupts
1169	>	* the thread (in the hope that it may terminate later) and fails.
1170	>	*/
1171	>	void awaitTermination(Thread t) {
1172	>	awaitTermination(t, LONG_DELAY_MS);
1173	>	}
1174	>
1175	>	// Some convenient Runnable classes
1176	>
1177	>	public abstract class CheckedRunnable implements Runnable {
1178	>	protected abstract void realRun() throws Throwable;
1179	>
1180	>	public final void run() {
1181		try {
1182	<	Thread.sleep(SHORT_DELAY_MS);
1183	<	threadShouldThrow();
1184	<	}
262	<	catch(InterruptedException success) {
1182	>	realRun();
1183	>	} catch (Throwable fail) {
1184	>	threadUnexpectedException(fail);
1185		}
1186		}
1187		}
1188
1189	<	class SmallRunnable implements Runnable {
1190	<	public void run() {
1189	>	public abstract class RunnableShouldThrow implements Runnable {
1190	>	protected abstract void realRun() throws Throwable;
1191	>
1192	>	final Class<?> exceptionClass;
1193	>
1194	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1195	>	this.exceptionClass = exceptionClass;
1196	>	}
1197	>
1198	>	public final void run() {
1199		try {
1200	<	Thread.sleep(SMALL_DELAY_MS);
1201	<	}
1202	<	catch(Exception e) {
1203	<	threadUnexpectedException();
1200	>	realRun();
1201	>	threadShouldThrow(exceptionClass.getSimpleName());
1202	>	} catch (Throwable t) {
1203	>	if (! exceptionClass.isInstance(t))
1204	>	threadUnexpectedException(t);
1205		}
1206		}
1207		}
1208
1209	<	class SmallCallable implements Callable {
1210	<	public Object call() {
1209	>	public abstract class ThreadShouldThrow extends Thread {
1210	>	protected abstract void realRun() throws Throwable;
1211	>
1212	>	final Class<?> exceptionClass;
1213	>
1214	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1215	>	this.exceptionClass = exceptionClass;
1216	>	}
1217	>
1218	>	public final void run() {
1219		try {
1220	<	Thread.sleep(SMALL_DELAY_MS);
1221	<	}
1222	<	catch(Exception e) {
1223	<	threadUnexpectedException();
1220	>	realRun();
1221	>	threadShouldThrow(exceptionClass.getSimpleName());
1222	>	} catch (Throwable t) {
1223	>	if (! exceptionClass.isInstance(t))
1224	>	threadUnexpectedException(t);
1225		}
286	–	return Boolean.TRUE;
1226		}
1227		}
1228
1229	<	class SmallInterruptedRunnable implements Runnable {
1230	<	public void run() {
1229	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1230	>	protected abstract void realRun() throws Throwable;
1231	>
1232	>	public final void run() {
1233		try {
1234	<	Thread.sleep(SMALL_DELAY_MS);
1235	<	threadShouldThrow();
1236	<	}
1237	<	catch(InterruptedException success) {
1234	>	realRun();
1235	>	threadShouldThrow("InterruptedException");
1236	>	} catch (InterruptedException success) {
1237	>	threadAssertFalse(Thread.interrupted());
1238	>	} catch (Throwable fail) {
1239	>	threadUnexpectedException(fail);
1240		}
1241		}
1242		}
1243
1244	+	public abstract class CheckedCallable<T> implements Callable<T> {
1245	+	protected abstract T realCall() throws Throwable;
1246
1247	<	class MediumRunnable implements Runnable {
303	<	public void run() {
1247	>	public final T call() {
1248		try {
1249	<	Thread.sleep(MEDIUM_DELAY_MS);
1250	<	}
1251	<	catch(Exception e) {
1252	<	threadUnexpectedException();
1249	>	return realCall();
1250	>	} catch (Throwable fail) {
1251	>	threadUnexpectedException(fail);
1252	>	return null;
1253		}
1254		}
1255		}
1256
1257	<	class MediumInterruptedRunnable implements Runnable {
1258	<	public void run() {
1257	>	public abstract class CheckedInterruptedCallable<T>
1258	>	implements Callable<T> {
1259	>	protected abstract T realCall() throws Throwable;
1260	>
1261	>	public final T call() {
1262		try {
1263	<	Thread.sleep(MEDIUM_DELAY_MS);
1264	<	threadShouldThrow();
1265	<	}
1266	<	catch(InterruptedException success) {
1263	>	T result = realCall();
1264	>	threadShouldThrow("InterruptedException");
1265	>	return result;
1266	>	} catch (InterruptedException success) {
1267	>	threadAssertFalse(Thread.interrupted());
1268	>	} catch (Throwable fail) {
1269	>	threadUnexpectedException(fail);
1270		}
1271	+	return null;
1272		}
1273		}
1274
1275	<	class MediumPossiblyInterruptedRunnable implements Runnable {
1276	<	public void run() {
1275	>	public static class NoOpRunnable implements Runnable {
1276	>	public void run() {}
1277	>	}
1278	>
1279	>	public static class NoOpCallable implements Callable {
1280	>	public Object call() { return Boolean.TRUE; }
1281	>	}
1282	>
1283	>	public static final String TEST_STRING = "a test string";
1284	>
1285	>	public static class StringTask implements Callable<String> {
1286	>	final String value;
1287	>	public StringTask() { this(TEST_STRING); }
1288	>	public StringTask(String value) { this.value = value; }
1289	>	public String call() { return value; }
1290	>	}
1291	>
1292	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1293	>	return new CheckedCallable<String>() {
1294	>	protected String realCall() {
1295	>	try {
1296	>	latch.await();
1297	>	} catch (InterruptedException quittingTime) {}
1298	>	return TEST_STRING;
1299	>	}};
1300	>	}
1301	>
1302	>	public Runnable countDowner(final CountDownLatch latch) {
1303	>	return new CheckedRunnable() {
1304	>	public void realRun() throws InterruptedException {
1305	>	latch.countDown();
1306	>	}};
1307	>	}
1308	>
1309	>	public Runnable awaiter(final CountDownLatch latch) {
1310	>	return new CheckedRunnable() {
1311	>	public void realRun() throws InterruptedException {
1312	>	await(latch);
1313	>	}};
1314	>	}
1315	>
1316	>	public void await(CountDownLatch latch) {
1317	>	try {
1318	>	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1319	>	} catch (Throwable fail) {
1320	>	threadUnexpectedException(fail);
1321	>	}
1322	>	}
1323	>
1324	>	public void await(Semaphore semaphore) {
1325	>	try {
1326	>	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1327	>	} catch (Throwable fail) {
1328	>	threadUnexpectedException(fail);
1329	>	}
1330	>	}
1331	>
1332	>	//     /**
1333	>	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1334	>	//      */
1335	>	//     public void await(AtomicBoolean flag) {
1336	>	//         await(flag, LONG_DELAY_MS);
1337	>	//     }
1338	>
1339	>	//     /**
1340	>	//      * Spin-waits up to the specified timeout until flag becomes true.
1341	>	//      */
1342	>	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1343	>	//         long startTime = System.nanoTime();
1344	>	//         while (!flag.get()) {
1345	>	//             if (millisElapsedSince(startTime) > timeoutMillis)
1346	>	//                 throw new AssertionFailedError("timed out");
1347	>	//             Thread.yield();
1348	>	//         }
1349	>	//     }
1350	>
1351	>	public static class NPETask implements Callable<String> {
1352	>	public String call() { throw new NullPointerException(); }
1353	>	}
1354	>
1355	>	public static class CallableOne implements Callable<Integer> {
1356	>	public Integer call() { return one; }
1357	>	}
1358	>
1359	>	public class ShortRunnable extends CheckedRunnable {
1360	>	protected void realRun() throws Throwable {
1361	>	delay(SHORT_DELAY_MS);
1362	>	}
1363	>	}
1364	>
1365	>	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1366	>	protected void realRun() throws InterruptedException {
1367	>	delay(SHORT_DELAY_MS);
1368	>	}
1369	>	}
1370	>
1371	>	public class SmallRunnable extends CheckedRunnable {
1372	>	protected void realRun() throws Throwable {
1373	>	delay(SMALL_DELAY_MS);
1374	>	}
1375	>	}
1376	>
1377	>	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1378	>	protected void realRun() {
1379		try {
1380	<	Thread.sleep(MEDIUM_DELAY_MS);
1381	<	}
1382	<	catch(InterruptedException success) {
1383	<	}
1380	>	delay(SMALL_DELAY_MS);
1381	>	} catch (InterruptedException ok) {}
1382	>	}
1383	>	}
1384	>
1385	>	public class SmallCallable extends CheckedCallable {
1386	>	protected Object realCall() throws InterruptedException {
1387	>	delay(SMALL_DELAY_MS);
1388	>	return Boolean.TRUE;
1389	>	}
1390	>	}
1391	>
1392	>	public class MediumRunnable extends CheckedRunnable {
1393	>	protected void realRun() throws Throwable {
1394	>	delay(MEDIUM_DELAY_MS);
1395	>	}
1396	>	}
1397	>
1398	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1399	>	protected void realRun() throws InterruptedException {
1400	>	delay(MEDIUM_DELAY_MS);
1401	>	}
1402	>	}
1403	>
1404	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1405	>	return new CheckedRunnable() {
1406	>	protected void realRun() {
1407	>	try {
1408	>	delay(timeoutMillis);
1409	>	} catch (InterruptedException ok) {}
1410	>	}};
1411	>	}
1412	>
1413	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1414	>	protected void realRun() {
1415	>	try {
1416	>	delay(MEDIUM_DELAY_MS);
1417	>	} catch (InterruptedException ok) {}
1418	>	}
1419	>	}
1420	>
1421	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1422	>	protected void realRun() {
1423	>	try {
1424	>	delay(LONG_DELAY_MS);
1425	>	} catch (InterruptedException ok) {}
1426		}
1427		}
1428
1429		/**
1430		* For use as ThreadFactory in constructors
1431		*/
1432	<	static class SimpleThreadFactory implements ThreadFactory{
1433	<	public Thread newThread(Runnable r){
1432	>	public static class SimpleThreadFactory implements ThreadFactory {
1433	>	public Thread newThread(Runnable r) {
1434		return new Thread(r);
1435	<	}
1435	>	}
1436		}
1437
1438	<	static class TrackedRunnable implements Runnable {
1439	<	volatile boolean done = false;
1438	>	public interface TrackedRunnable extends Runnable {
1439	>	boolean isDone();
1440	>	}
1441	>
1442	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1443	>	return new TrackedRunnable() {
1444	>	private volatile boolean done = false;
1445	>	public boolean isDone() { return done; }
1446	>	public void run() {
1447	>	try {
1448	>	delay(timeoutMillis);
1449	>	done = true;
1450	>	} catch (InterruptedException ok) {}
1451	>	}
1452	>	};
1453	>	}
1454	>
1455	>	public static class TrackedShortRunnable implements Runnable {
1456	>	public volatile boolean done = false;
1457		public void run() {
1458		try {
1459	<	Thread.sleep(SMALL_DELAY_MS);
1459	>	delay(SHORT_DELAY_MS);
1460		done = true;
1461	<	} catch(Exception e){
1462	<	}
1461	>	} catch (InterruptedException ok) {}
1462	>	}
1463	>	}
1464	>
1465	>	public static class TrackedSmallRunnable implements Runnable {
1466	>	public volatile boolean done = false;
1467	>	public void run() {
1468	>	try {
1469	>	delay(SMALL_DELAY_MS);
1470	>	done = true;
1471	>	} catch (InterruptedException ok) {}
1472	>	}
1473	>	}
1474	>
1475	>	public static class TrackedMediumRunnable implements Runnable {
1476	>	public volatile boolean done = false;
1477	>	public void run() {
1478	>	try {
1479	>	delay(MEDIUM_DELAY_MS);
1480	>	done = true;
1481	>	} catch (InterruptedException ok) {}
1482		}
1483		}
1484
1485	<	static class TrackedCallable implements Callable {
1486	<	volatile boolean done = false;
1485	>	public static class TrackedLongRunnable implements Runnable {
1486	>	public volatile boolean done = false;
1487	>	public void run() {
1488	>	try {
1489	>	delay(LONG_DELAY_MS);
1490	>	done = true;
1491	>	} catch (InterruptedException ok) {}
1492	>	}
1493	>	}
1494	>
1495	>	public static class TrackedNoOpRunnable implements Runnable {
1496	>	public volatile boolean done = false;
1497	>	public void run() {
1498	>	done = true;
1499	>	}
1500	>	}
1501	>
1502	>	public static class TrackedCallable implements Callable {
1503	>	public volatile boolean done = false;
1504		public Object call() {
1505		try {
1506	<	Thread.sleep(SMALL_DELAY_MS);
1506	>	delay(SMALL_DELAY_MS);
1507		done = true;
1508	<	} catch(Exception e){
361	<	}
1508	>	} catch (InterruptedException ok) {}
1509		return Boolean.TRUE;
1510		}
1511		}
1512
1513		/**
1514	+	* Analog of CheckedRunnable for RecursiveAction
1515	+	*/
1516	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1517	+	protected abstract void realCompute() throws Throwable;
1518	+
1519	+	@Override protected final void compute() {
1520	+	try {
1521	+	realCompute();
1522	+	} catch (Throwable fail) {
1523	+	threadUnexpectedException(fail);
1524	+	}
1525	+	}
1526	+	}
1527	+
1528	+	/**
1529	+	* Analog of CheckedCallable for RecursiveTask
1530	+	*/
1531	+	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1532	+	protected abstract T realCompute() throws Throwable;
1533	+
1534	+	@Override protected final T compute() {
1535	+	try {
1536	+	return realCompute();
1537	+	} catch (Throwable fail) {
1538	+	threadUnexpectedException(fail);
1539	+	return null;
1540	+	}
1541	+	}
1542	+	}
1543	+
1544	+	/**
1545		* For use as RejectedExecutionHandler in constructors
1546		*/
1547	<	static class NoOpREHandler implements RejectedExecutionHandler{
1548	<	public void rejectedExecution(Runnable r, ThreadPoolExecutor executor){}
1547	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1548	>	public void rejectedExecution(Runnable r,
1549	>	ThreadPoolExecutor executor) {}
1550	>	}
1551	>
1552	>	/**
1553	>	* A CyclicBarrier that uses timed await and fails with
1554	>	* AssertionFailedErrors instead of throwing checked exceptions.
1555	>	*/
1556	>	public class CheckedBarrier extends CyclicBarrier {
1557	>	public CheckedBarrier(int parties) { super(parties); }
1558	>
1559	>	public int await() {
1560	>	try {
1561	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1562	>	} catch (TimeoutException timedOut) {
1563	>	throw new AssertionFailedError("timed out");
1564	>	} catch (Exception fail) {
1565	>	AssertionFailedError afe =
1566	>	new AssertionFailedError("Unexpected exception: " + fail);
1567	>	afe.initCause(fail);
1568	>	throw afe;
1569	>	}
1570	>	}
1571	>	}
1572	>
1573	>	void checkEmpty(BlockingQueue q) {
1574	>	try {
1575	>	assertTrue(q.isEmpty());
1576	>	assertEquals(0, q.size());
1577	>	assertNull(q.peek());
1578	>	assertNull(q.poll());
1579	>	assertNull(q.poll(0, MILLISECONDS));
1580	>	assertEquals(q.toString(), "[]");
1581	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1582	>	assertFalse(q.iterator().hasNext());
1583	>	try {
1584	>	q.element();
1585	>	shouldThrow();
1586	>	} catch (NoSuchElementException success) {}
1587	>	try {
1588	>	q.iterator().next();
1589	>	shouldThrow();
1590	>	} catch (NoSuchElementException success) {}
1591	>	try {
1592	>	q.remove();
1593	>	shouldThrow();
1594	>	} catch (NoSuchElementException success) {}
1595	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1596	>	}
1597	>
1598	>	void assertSerialEquals(Object x, Object y) {
1599	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1600	>	}
1601	>
1602	>	void assertNotSerialEquals(Object x, Object y) {
1603	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1604	>	}
1605	>
1606	>	byte[] serialBytes(Object o) {
1607	>	try {
1608	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1609	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1610	>	oos.writeObject(o);
1611	>	oos.flush();
1612	>	oos.close();
1613	>	return bos.toByteArray();
1614	>	} catch (Throwable fail) {
1615	>	threadUnexpectedException(fail);
1616	>	return new byte[0];
1617	>	}
1618	>	}
1619	>
1620	>	@SuppressWarnings("unchecked")
1621	>	<T> T serialClone(T o) {
1622	>	try {
1623	>	ObjectInputStream ois = new ObjectInputStream
1624	>	(new ByteArrayInputStream(serialBytes(o)));
1625	>	T clone = (T) ois.readObject();
1626	>	assertSame(o.getClass(), clone.getClass());
1627	>	return clone;
1628	>	} catch (Throwable fail) {
1629	>	threadUnexpectedException(fail);
1630	>	return null;
1631	>	}
1632	>	}
1633	>
1634	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1635	>	Runnable... throwingActions) {
1636	>	for (Runnable throwingAction : throwingActions) {
1637	>	boolean threw = false;
1638	>	try { throwingAction.run(); }
1639	>	catch (Throwable t) {
1640	>	threw = true;
1641	>	if (!expectedExceptionClass.isInstance(t)) {
1642	>	AssertionFailedError afe =
1643	>	new AssertionFailedError
1644	>	("Expected " + expectedExceptionClass.getName() +
1645	>	", got " + t.getClass().getName());
1646	>	afe.initCause(t);
1647	>	threadUnexpectedException(afe);
1648	>	}
1649	>	}
1650	>	if (!threw)
1651	>	shouldThrow(expectedExceptionClass.getName());
1652	>	}
1653	>	}
1654	>
1655	>	public void assertIteratorExhausted(Iterator<?> it) {
1656	>	try {
1657	>	it.next();
1658	>	shouldThrow();
1659	>	} catch (NoSuchElementException success) {}
1660	>	assertFalse(it.hasNext());
1661		}
372	–
373	–
1662		}

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