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

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