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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.2 by dl, Sat Sep 20 00:31:57 2003 UTC vs.
Revision 1.93 by jsr166, Sun Dec 16 17:22:42 2012 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.io.ByteArrayInputStream;
11	>	import java.io.ByteArrayOutputStream;
12	>	import java.io.ObjectInputStream;
13	>	import java.io.ObjectOutputStream;
14	>	import java.util.ArrayList;
15	>	import java.util.Arrays;
16	>	import java.util.Date;
17	>	import java.util.Enumeration;
18	>	import java.util.List;
19	>	import java.util.NoSuchElementException;
20	>	import java.util.PropertyPermission;
21		import java.util.concurrent.*;
22	<	import java.io.*;
23	<
22	>	import java.util.concurrent.atomic.AtomicBoolean;
23	>	import java.util.concurrent.atomic.AtomicReference;
24	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
25	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
26	>	import java.security.CodeSource;
27	>	import java.security.Permission;
28	>	import java.security.PermissionCollection;
29	>	import java.security.Permissions;
30	>	import java.security.Policy;
31	>	import java.security.ProtectionDomain;
32	>	import java.security.SecurityPermission;
33
34		/**
35	<	* Base class for JSR166 Junit TCK tests.  Defines some constants and
36	<	* utility methods, as well as a simple framework for helping to make
37	<	* sure that assertions failing in generated threads cause the
38	<	* associated test that generated them to itself fail (which JUnit doe
39	<	* not otherwise arrange).  The rules for creating such tests are:
35	>	* Base class for JSR166 Junit TCK tests.  Defines some constants,
36	>	* utility methods and classes, as well as a simple framework for
37	>	* helping to make sure that assertions failing in generated threads
38	>	* cause the associated test that generated them to itself fail (which
39	>	* JUnit does not otherwise arrange).  The rules for creating such
40	>	* tests are:
41		*
42		* <ol>
43		*
44		* <li> All assertions in code running in generated threads must use
45	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
46	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
47	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
45	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
46	>	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
47	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
48		* particularly recommended) for other code to use these forms too.
49		* Only the most typically used JUnit assertion methods are defined
50		* this way, but enough to live with.</li>
51		*
52	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
53	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
52	>	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
53	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
54		* them. These methods are used to clear and check for thread
55		* assertion failures.</li>
56		*
57	<	* <li>All delays and timeouts must use one of the constants {@link
58	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
59	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
60	<	* discriminatable from zero time, and always allows enough time for
61	<	* the small amounts of computation (creating a thread, calling a few
57	>	* <li>All delays and timeouts must use one of the constants {@code
58	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
59	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
60	>	* discriminable from zero time, and always allows enough time for the
61	>	* small amounts of computation (creating a thread, calling a few
62		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
63		* is always discriminable as larger than SHORT and smaller than
64		* MEDIUM.  And so on. These constants are set to conservative values,
65		* but even so, if there is ever any doubt, they can all be increased
66	<	* in one spot to rerun tests on slower platforms</li>
66	>	* in one spot to rerun tests on slower platforms.</li>
67		*
68		* <li> All threads generated must be joined inside each test case
69	<	* method (or <tt>fail</tt> to do so) before returning from the
70	<	* method. The {@link joinPool} method can be used to do this when
69	>	* method (or {@code fail} to do so) before returning from the
70	>	* method. The {@code joinPool} method can be used to do this when
71		* using Executors.</li>
72		*
73		* </ol>
74	+	*
75	+	* <p><b>Other notes</b>
76	+	* <ul>
77	+	*
78	+	* <li> Usually, there is one testcase method per JSR166 method
79	+	* covering "normal" operation, and then as many exception-testing
80	+	* methods as there are exceptions the method can throw. Sometimes
81	+	* there are multiple tests per JSR166 method when the different
82	+	* "normal" behaviors differ significantly. And sometimes testcases
83	+	* cover multiple methods when they cannot be tested in
84	+	* isolation.</li>
85	+	*
86	+	* <li> The documentation style for testcases is to provide as javadoc
87	+	* a simple sentence or two describing the property that the testcase
88	+	* method purports to test. The javadocs do not say anything about how
89	+	* the property is tested. To find out, read the code.</li>
90	+	*
91	+	* <li> These tests are "conformance tests", and do not attempt to
92	+	* test throughput, latency, scalability or other performance factors
93	+	* (see the separate "jtreg" tests for a set intended to check these
94	+	* for the most central aspects of functionality.) So, most tests use
95	+	* the smallest sensible numbers of threads, collection sizes, etc
96	+	* needed to check basic conformance.</li>
97	+	*
98	+	* <li>The test classes currently do not declare inclusion in
99	+	* any particular package to simplify things for people integrating
100	+	* them in TCK test suites.</li>
101	+	*
102	+	* <li> As a convenience, the {@code main} of this class (JSR166TestCase)
103	+	* runs all JSR166 unit tests.</li>
104	+	*
105	+	* </ul>
106		*/
107		public class JSR166TestCase extends TestCase {
108	+	private static final boolean useSecurityManager =
109	+	Boolean.getBoolean("jsr166.useSecurityManager");
110	+
111	+	protected static final boolean expensiveTests =
112	+	Boolean.getBoolean("jsr166.expensiveTests");
113	+
114	+	/**
115	+	* If true, report on stdout all "slow" tests, that is, ones that
116	+	* take more than profileThreshold milliseconds to execute.
117	+	*/
118	+	private static final boolean profileTests =
119	+	Boolean.getBoolean("jsr166.profileTests");
120	+
121	+	/**
122	+	* The number of milliseconds that tests are permitted for
123	+	* execution without being reported, when profileTests is set.
124	+	*/
125	+	private static final long profileThreshold =
126	+	Long.getLong("jsr166.profileThreshold", 100);
127	+
128	+	protected void runTest() throws Throwable {
129	+	if (profileTests)
130	+	runTestProfiled();
131	+	else
132	+	super.runTest();
133	+	}
134	+
135	+	protected void runTestProfiled() throws Throwable {
136	+	long t0 = System.nanoTime();
137	+	try {
138	+	super.runTest();
139	+	} finally {
140	+	long elapsedMillis =
141	+	(System.nanoTime() - t0) / (1000L * 1000L);
142	+	if (elapsedMillis >= profileThreshold)
143	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
144	+	}
145	+	}
146	+
147	+	/**
148	+	* Runs all JSR166 unit tests using junit.textui.TestRunner
149	+	*/
150	+	public static void main(String[] args) {
151	+	if (useSecurityManager) {
152	+	System.err.println("Setting a permissive security manager");
153	+	Policy.setPolicy(permissivePolicy());
154	+	System.setSecurityManager(new SecurityManager());
155	+	}
156	+	int iters = (args.length == 0) ? 1 : Integer.parseInt(args[0]);
157	+
158	+	Test s = suite();
159	+	for (int i = 0; i < iters; ++i) {
160	+	junit.textui.TestRunner.run(s);
161	+	System.gc();
162	+	System.runFinalization();
163	+	}
164	+	System.exit(0);
165	+	}
166	+
167	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
168	+	TestSuite suite = new TestSuite();
169	+	for (Object suiteOrClass : suiteOrClasses) {
170	+	if (suiteOrClass instanceof TestSuite)
171	+	suite.addTest((TestSuite) suiteOrClass);
172	+	else if (suiteOrClass instanceof Class)
173	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
174	+	else
175	+	throw new ClassCastException("not a test suite or class");
176	+	}
177	+	return suite;
178	+	}
179	+
180	+	/**
181	+	* Collects all JSR166 unit tests as one suite.
182	+	*/
183	+	public static Test suite() {
184	+	return newTestSuite(
185	+	ForkJoinPoolTest.suite(),
186	+	ForkJoinTaskTest.suite(),
187	+	RecursiveActionTest.suite(),
188	+	RecursiveTaskTest.suite(),
189	+	LinkedTransferQueueTest.suite(),
190	+	PhaserTest.suite(),
191	+	ThreadLocalRandomTest.suite(),
192	+	AbstractExecutorServiceTest.suite(),
193	+	AbstractQueueTest.suite(),
194	+	AbstractQueuedSynchronizerTest.suite(),
195	+	AbstractQueuedLongSynchronizerTest.suite(),
196	+	ArrayBlockingQueueTest.suite(),
197	+	ArrayDequeTest.suite(),
198	+	AtomicBooleanTest.suite(),
199	+	AtomicIntegerArrayTest.suite(),
200	+	AtomicIntegerFieldUpdaterTest.suite(),
201	+	AtomicIntegerTest.suite(),
202	+	AtomicLongArrayTest.suite(),
203	+	AtomicLongFieldUpdaterTest.suite(),
204	+	AtomicLongTest.suite(),
205	+	AtomicMarkableReferenceTest.suite(),
206	+	AtomicReferenceArrayTest.suite(),
207	+	AtomicReferenceFieldUpdaterTest.suite(),
208	+	AtomicReferenceTest.suite(),
209	+	AtomicStampedReferenceTest.suite(),
210	+	ConcurrentHashMapTest.suite(),
211	+	ConcurrentLinkedDequeTest.suite(),
212	+	ConcurrentLinkedQueueTest.suite(),
213	+	ConcurrentSkipListMapTest.suite(),
214	+	ConcurrentSkipListSubMapTest.suite(),
215	+	ConcurrentSkipListSetTest.suite(),
216	+	ConcurrentSkipListSubSetTest.suite(),
217	+	CopyOnWriteArrayListTest.suite(),
218	+	CopyOnWriteArraySetTest.suite(),
219	+	CountDownLatchTest.suite(),
220	+	CyclicBarrierTest.suite(),
221	+	DelayQueueTest.suite(),
222	+	EntryTest.suite(),
223	+	ExchangerTest.suite(),
224	+	ExecutorsTest.suite(),
225	+	ExecutorCompletionServiceTest.suite(),
226	+	FutureTaskTest.suite(),
227	+	LinkedBlockingDequeTest.suite(),
228	+	LinkedBlockingQueueTest.suite(),
229	+	LinkedListTest.suite(),
230	+	LockSupportTest.suite(),
231	+	PriorityBlockingQueueTest.suite(),
232	+	PriorityQueueTest.suite(),
233	+	ReentrantLockTest.suite(),
234	+	ReentrantReadWriteLockTest.suite(),
235	+	ScheduledExecutorTest.suite(),
236	+	ScheduledExecutorSubclassTest.suite(),
237	+	SemaphoreTest.suite(),
238	+	SynchronousQueueTest.suite(),
239	+	SystemTest.suite(),
240	+	ThreadLocalTest.suite(),
241	+	ThreadPoolExecutorTest.suite(),
242	+	ThreadPoolExecutorSubclassTest.suite(),
243	+	ThreadTest.suite(),
244	+	TimeUnitTest.suite(),
245	+	TreeMapTest.suite(),
246	+	TreeSetTest.suite(),
247	+	TreeSubMapTest.suite(),
248	+	TreeSubSetTest.suite());
249	+	}
250	+
251
252		public static long SHORT_DELAY_MS;
253		public static long SMALL_DELAY_MS;
#	Line 60 | Line 256 | public class JSR166TestCase extends Test
256
257
258		/**
259	<	* Return the shortest timed delay. This could
260	<	* be reimplmented to use for example a Property.
261	<	*/
259	>	* Returns the shortest timed delay. This could
260	>	* be reimplemented to use for example a Property.
261	>	*/
262		protected long getShortDelay() {
263		return 50;
264		}
265
70	–
266		/**
267	<	* Set delays as multiples fo SHORT_DELAY.
267	>	* Sets delays as multiples of SHORT_DELAY.
268		*/
269	<	protected  void setDelays() {
269	>	protected void setDelays() {
270		SHORT_DELAY_MS = getShortDelay();
271	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
271	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
272		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
273	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
273	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
274	>	}
275	>
276	>	/**
277	>	* Returns a timeout in milliseconds to be used in tests that
278	>	* verify that operations block or time out.
279	>	*/
280	>	long timeoutMillis() {
281	>	return SHORT_DELAY_MS / 4;
282	>	}
283	>
284	>	/**
285	>	* Returns a new Date instance representing a time delayMillis
286	>	* milliseconds in the future.
287	>	*/
288	>	Date delayedDate(long delayMillis) {
289	>	return new Date(System.currentTimeMillis() + delayMillis);
290		}
291
292		/**
293	<	* Flag set true if any threadAssert methods fail
293	>	* The first exception encountered if any threadAssertXXX method fails.
294		*/
295	<	protected volatile boolean threadFailed;
295	>	private final AtomicReference<Throwable> threadFailure
296	>	= new AtomicReference<Throwable>(null);
297
298		/**
299	<	* Initialize test to indicat that no thread assertions have failed
299	>	* Records an exception so that it can be rethrown later in the test
300	>	* harness thread, triggering a test case failure.  Only the first
301	>	* failure is recorded; subsequent calls to this method from within
302	>	* the same test have no effect.
303		*/
304	<	public void setUp() {
304	>	public void threadRecordFailure(Throwable t) {
305	>	threadFailure.compareAndSet(null, t);
306	>	}
307	>
308	>	public void setUp() {
309		setDelays();
91	–	threadFailed = false;
310		}
311
312		/**
313	<	* Trigger test case failure if any thread assertions have failed
313	>	* Extra checks that get done for all test cases.
314	>	*
315	>	* Triggers test case failure if any thread assertions have failed,
316	>	* by rethrowing, in the test harness thread, any exception recorded
317	>	* earlier by threadRecordFailure.
318	>	*
319	>	* Triggers test case failure if interrupt status is set in the main thread.
320		*/
321	<	public void tearDown() {
322	<	assertFalse(threadFailed);
321	>	public void tearDown() throws Exception {
322	>	Throwable t = threadFailure.getAndSet(null);
323	>	if (t != null) {
324	>	if (t instanceof Error)
325	>	throw (Error) t;
326	>	else if (t instanceof RuntimeException)
327	>	throw (RuntimeException) t;
328	>	else if (t instanceof Exception)
329	>	throw (Exception) t;
330	>	else {
331	>	AssertionFailedError afe =
332	>	new AssertionFailedError(t.toString());
333	>	afe.initCause(t);
334	>	throw afe;
335	>	}
336	>	}
337	>
338	>	if (Thread.interrupted())
339	>	throw new AssertionFailedError("interrupt status set in main thread");
340		}
341
342	+	/**
343	+	* Just like fail(reason), but additionally recording (using
344	+	* threadRecordFailure) any AssertionFailedError thrown, so that
345	+	* the current testcase will fail.
346	+	*/
347		public void threadFail(String reason) {
348	<	threadFailed = true;
349	<	fail(reason);
348	>	try {
349	>	fail(reason);
350	>	} catch (AssertionFailedError t) {
351	>	threadRecordFailure(t);
352	>	fail(reason);
353	>	}
354		}
355
356	+	/**
357	+	* Just like assertTrue(b), but additionally recording (using
358	+	* threadRecordFailure) any AssertionFailedError thrown, so that
359	+	* the current testcase will fail.
360	+	*/
361		public void threadAssertTrue(boolean b) {
362	<	if (!b) {
108	<	threadFailed = true;
362	>	try {
363		assertTrue(b);
364	+	} catch (AssertionFailedError t) {
365	+	threadRecordFailure(t);
366	+	throw t;
367		}
368		}
369	+
370	+	/**
371	+	* Just like assertFalse(b), but additionally recording (using
372	+	* threadRecordFailure) any AssertionFailedError thrown, so that
373	+	* the current testcase will fail.
374	+	*/
375		public void threadAssertFalse(boolean b) {
376	<	if (b) {
114	<	threadFailed = true;
376	>	try {
377		assertFalse(b);
378	+	} catch (AssertionFailedError t) {
379	+	threadRecordFailure(t);
380	+	throw t;
381		}
382		}
383	+
384	+	/**
385	+	* Just like assertNull(x), but additionally recording (using
386	+	* threadRecordFailure) any AssertionFailedError thrown, so that
387	+	* the current testcase will fail.
388	+	*/
389		public void threadAssertNull(Object x) {
390	<	if (x != null) {
120	<	threadFailed = true;
390	>	try {
391		assertNull(x);
392	+	} catch (AssertionFailedError t) {
393	+	threadRecordFailure(t);
394	+	throw t;
395		}
396		}
397	+
398	+	/**
399	+	* Just like assertEquals(x, y), but additionally recording (using
400	+	* threadRecordFailure) any AssertionFailedError thrown, so that
401	+	* the current testcase will fail.
402	+	*/
403		public void threadAssertEquals(long x, long y) {
404	<	if (x != y) {
126	<	threadFailed = true;
404	>	try {
405		assertEquals(x, y);
406	+	} catch (AssertionFailedError t) {
407	+	threadRecordFailure(t);
408	+	throw t;
409		}
410		}
411	+
412	+	/**
413	+	* Just like assertEquals(x, y), but additionally recording (using
414	+	* threadRecordFailure) any AssertionFailedError thrown, so that
415	+	* the current testcase will fail.
416	+	*/
417		public void threadAssertEquals(Object x, Object y) {
418	<	if (x != y && (x == null || !x.equals(y))) {
132	<	threadFailed = true;
418	>	try {
419		assertEquals(x, y);
420	+	} catch (AssertionFailedError t) {
421	+	threadRecordFailure(t);
422	+	throw t;
423	+	} catch (Throwable t) {
424	+	threadUnexpectedException(t);
425		}
426		}
427
428		/**
429	<	* Wait out termination of a thread pool or fail doing so
429	>	* Just like assertSame(x, y), but additionally recording (using
430	>	* threadRecordFailure) any AssertionFailedError thrown, so that
431	>	* the current testcase will fail.
432		*/
433	<	public void joinPool(ExecutorService exec) {
433	>	public void threadAssertSame(Object x, Object y) {
434	>	try {
435	>	assertSame(x, y);
436	>	} catch (AssertionFailedError t) {
437	>	threadRecordFailure(t);
438	>	throw t;
439	>	}
440	>	}
441	>
442	>	/**
443	>	* Calls threadFail with message "should throw exception".
444	>	*/
445	>	public void threadShouldThrow() {
446	>	threadFail("should throw exception");
447	>	}
448	>
449	>	/**
450	>	* Calls threadFail with message "should throw" + exceptionName.
451	>	*/
452	>	public void threadShouldThrow(String exceptionName) {
453	>	threadFail("should throw " + exceptionName);
454	>	}
455	>
456	>	/**
457	>	* Records the given exception using {@link #threadRecordFailure},
458	>	* then rethrows the exception, wrapping it in an
459	>	* AssertionFailedError if necessary.
460	>	*/
461	>	public void threadUnexpectedException(Throwable t) {
462	>	threadRecordFailure(t);
463	>	t.printStackTrace();
464	>	if (t instanceof RuntimeException)
465	>	throw (RuntimeException) t;
466	>	else if (t instanceof Error)
467	>	throw (Error) t;
468	>	else {
469	>	AssertionFailedError afe =
470	>	new AssertionFailedError("unexpected exception: " + t);
471	>	afe.initCause(t);
472	>	throw afe;
473	>	}
474	>	}
475	>
476	>	/**
477	>	* Delays, via Thread.sleep, for the given millisecond delay, but
478	>	* if the sleep is shorter than specified, may re-sleep or yield
479	>	* until time elapses.
480	>	*/
481	>	static void delay(long millis) throws InterruptedException {
482	>	long startTime = System.nanoTime();
483	>	long ns = millis * 1000 * 1000;
484	>	for (;;) {
485	>	if (millis > 0L)
486	>	Thread.sleep(millis);
487	>	else // too short to sleep
488	>	Thread.yield();
489	>	long d = ns - (System.nanoTime() - startTime);
490	>	if (d > 0L)
491	>	millis = d / (1000 * 1000);
492	>	else
493	>	break;
494	>	}
495	>	}
496	>
497	>	/**
498	>	* Waits out termination of a thread pool or fails doing so.
499	>	*/
500	>	void joinPool(ExecutorService exec) {
501		try {
502		exec.shutdown();
503	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
504	<	} catch(InterruptedException ie) {
505	<	fail("unexpected exception");
503	>	assertTrue("ExecutorService did not terminate in a timely manner",
504	>	exec.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS));
505	>	} catch (SecurityException ok) {
506	>	// Allowed in case test doesn't have privs
507	>	} catch (InterruptedException ie) {
508	>	fail("Unexpected InterruptedException");
509	>	}
510	>	}
511	>
512	>	/**
513	>	* Checks that thread does not terminate within the default
514	>	* millisecond delay of {@code timeoutMillis()}.
515	>	*/
516	>	void assertThreadStaysAlive(Thread thread) {
517	>	assertThreadStaysAlive(thread, timeoutMillis());
518	>	}
519	>
520	>	/**
521	>	* Checks that thread does not terminate within the given millisecond delay.
522	>	*/
523	>	void assertThreadStaysAlive(Thread thread, long millis) {
524	>	try {
525	>	// No need to optimize the failing case via Thread.join.
526	>	delay(millis);
527	>	assertTrue(thread.isAlive());
528	>	} catch (InterruptedException ie) {
529	>	fail("Unexpected InterruptedException");
530	>	}
531	>	}
532	>
533	>	/**
534	>	* Checks that the threads do not terminate within the default
535	>	* millisecond delay of {@code timeoutMillis()}.
536	>	*/
537	>	void assertThreadsStayAlive(Thread... threads) {
538	>	assertThreadsStayAlive(timeoutMillis(), threads);
539	>	}
540	>
541	>	/**
542	>	* Checks that the threads do not terminate within the given millisecond delay.
543	>	*/
544	>	void assertThreadsStayAlive(long millis, Thread... threads) {
545	>	try {
546	>	// No need to optimize the failing case via Thread.join.
547	>	delay(millis);
548	>	for (Thread thread : threads)
549	>	assertTrue(thread.isAlive());
550	>	} catch (InterruptedException ie) {
551	>	fail("Unexpected InterruptedException");
552		}
553		}
554
555	+	/**
556	+	* Checks that future.get times out, with the default timeout of
557	+	* {@code timeoutMillis()}.
558	+	*/
559	+	void assertFutureTimesOut(Future future) {
560	+	assertFutureTimesOut(future, timeoutMillis());
561	+	}
562	+
563	+	/**
564	+	* Checks that future.get times out, with the given millisecond timeout.
565	+	*/
566	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
567	+	long startTime = System.nanoTime();
568	+	try {
569	+	future.get(timeoutMillis, MILLISECONDS);
570	+	shouldThrow();
571	+	} catch (TimeoutException success) {
572	+	} catch (Exception e) {
573	+	threadUnexpectedException(e);
574	+	} finally { future.cancel(true); }
575	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
576	+	}
577
578	+	/**
579	+	* Fails with message "should throw exception".
580	+	*/
581	+	public void shouldThrow() {
582	+	fail("Should throw exception");
583	+	}
584	+
585	+	/**
586	+	* Fails with message "should throw " + exceptionName.
587	+	*/
588	+	public void shouldThrow(String exceptionName) {
589	+	fail("Should throw " + exceptionName);
590	+	}
591
592		/**
593		* The number of elements to place in collections, arrays, etc.
#	Line 155 | Line 596 | public class JSR166TestCase extends Test
596
597		// Some convenient Integer constants
598
599	<	public static final Integer zero = new Integer(0);
600	<	public static final Integer one = new Integer(1);
601	<	public static final Integer two = new Integer(2);
602	<	public static final Integer three  = new Integer(3);
599	>	public static final Integer zero  = new Integer(0);
600	>	public static final Integer one   = new Integer(1);
601	>	public static final Integer two   = new Integer(2);
602	>	public static final Integer three = new Integer(3);
603		public static final Integer four  = new Integer(4);
604		public static final Integer five  = new Integer(5);
605	<	public static final Integer six = new Integer(6);
605	>	public static final Integer six   = new Integer(6);
606		public static final Integer seven = new Integer(7);
607		public static final Integer eight = new Integer(8);
608	<	public static final Integer nine = new Integer(9);
608	>	public static final Integer nine  = new Integer(9);
609		public static final Integer m1  = new Integer(-1);
610		public static final Integer m2  = new Integer(-2);
611		public static final Integer m3  = new Integer(-3);
612	<	public static final Integer m4 = new Integer(-4);
613	<	public static final Integer m5 = new Integer(-5);
612	>	public static final Integer m4  = new Integer(-4);
613	>	public static final Integer m5  = new Integer(-5);
614	>	public static final Integer m6  = new Integer(-6);
615		public static final Integer m10 = new Integer(-10);
616
617
618	<	// Some convenient Runnable classes
618	>	/**
619	>	* Runs Runnable r with a security policy that permits precisely
620	>	* the specified permissions.  If there is no current security
621	>	* manager, the runnable is run twice, both with and without a
622	>	* security manager.  We require that any security manager permit
623	>	* getPolicy/setPolicy.
624	>	*/
625	>	public void runWithPermissions(Runnable r, Permission... permissions) {
626	>	SecurityManager sm = System.getSecurityManager();
627	>	if (sm == null) {
628	>	r.run();
629	>	}
630	>	runWithSecurityManagerWithPermissions(r, permissions);
631	>	}
632
633	<	public static class NoOpRunnable implements Runnable {
634	<	public void run() {}
633	>	/**
634	>	* Runs Runnable r with a security policy that permits precisely
635	>	* the specified permissions.  If there is no current security
636	>	* manager, a temporary one is set for the duration of the
637	>	* Runnable.  We require that any security manager permit
638	>	* getPolicy/setPolicy.
639	>	*/
640	>	public void runWithSecurityManagerWithPermissions(Runnable r,
641	>	Permission... permissions) {
642	>	SecurityManager sm = System.getSecurityManager();
643	>	if (sm == null) {
644	>	Policy savedPolicy = Policy.getPolicy();
645	>	try {
646	>	Policy.setPolicy(permissivePolicy());
647	>	System.setSecurityManager(new SecurityManager());
648	>	runWithSecurityManagerWithPermissions(r, permissions);
649	>	} finally {
650	>	System.setSecurityManager(null);
651	>	Policy.setPolicy(savedPolicy);
652	>	}
653	>	} else {
654	>	Policy savedPolicy = Policy.getPolicy();
655	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
656	>	Policy.setPolicy(policy);
657	>
658	>	try {
659	>	r.run();
660	>	} finally {
661	>	policy.addPermission(new SecurityPermission("setPolicy"));
662	>	Policy.setPolicy(savedPolicy);
663	>	}
664	>	}
665		}
666
667	<	public static class NoOpCallable implements Callable {
668	<	public Object call() { return Boolean.TRUE; }
667	>	/**
668	>	* Runs a runnable without any permissions.
669	>	*/
670	>	public void runWithoutPermissions(Runnable r) {
671	>	runWithPermissions(r);
672		}
673
674	<	public class ShortRunnable implements Runnable {
675	<	public void run() {
676	<	try {
677	<	Thread.sleep(SHORT_DELAY_MS);
674	>	/**
675	>	* A security policy where new permissions can be dynamically added
676	>	* or all cleared.
677	>	*/
678	>	public static class AdjustablePolicy extends java.security.Policy {
679	>	Permissions perms = new Permissions();
680	>	AdjustablePolicy(Permission... permissions) {
681	>	for (Permission permission : permissions)
682	>	perms.add(permission);
683	>	}
684	>	void addPermission(Permission perm) { perms.add(perm); }
685	>	void clearPermissions() { perms = new Permissions(); }
686	>	public PermissionCollection getPermissions(CodeSource cs) {
687	>	return perms;
688	>	}
689	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
690	>	return perms;
691	>	}
692	>	public boolean implies(ProtectionDomain pd, Permission p) {
693	>	return perms.implies(p);
694	>	}
695	>	public void refresh() {}
696	>	public String toString() {
697	>	List<Permission> ps = new ArrayList<Permission>();
698	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
699	>	ps.add(e.nextElement());
700	>	return "AdjustablePolicy with permissions " + ps;
701	>	}
702	>	}
703	>
704	>	/**
705	>	* Returns a policy containing all the permissions we ever need.
706	>	*/
707	>	public static Policy permissivePolicy() {
708	>	return new AdjustablePolicy
709	>	// Permissions j.u.c. needs directly
710	>	(new RuntimePermission("modifyThread"),
711	>	new RuntimePermission("getClassLoader"),
712	>	new RuntimePermission("setContextClassLoader"),
713	>	// Permissions needed to change permissions!
714	>	new SecurityPermission("getPolicy"),
715	>	new SecurityPermission("setPolicy"),
716	>	new RuntimePermission("setSecurityManager"),
717	>	// Permissions needed by the junit test harness
718	>	new RuntimePermission("accessDeclaredMembers"),
719	>	new PropertyPermission("*", "read"),
720	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
721	>	}
722	>
723	>	/**
724	>	* Sleeps until the given time has elapsed.
725	>	* Throws AssertionFailedError if interrupted.
726	>	*/
727	>	void sleep(long millis) {
728	>	try {
729	>	delay(millis);
730	>	} catch (InterruptedException ie) {
731	>	AssertionFailedError afe =
732	>	new AssertionFailedError("Unexpected InterruptedException");
733	>	afe.initCause(ie);
734	>	throw afe;
735	>	}
736	>	}
737	>
738	>	/**
739	>	* Spin-waits up to the specified number of milliseconds for the given
740	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
741	>	*/
742	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
743	>	long startTime = System.nanoTime();
744	>	for (;;) {
745	>	Thread.State s = thread.getState();
746	>	if (s == Thread.State.BLOCKED ||
747	>	s == Thread.State.WAITING ||
748	>	s == Thread.State.TIMED_WAITING)
749	>	return;
750	>	else if (s == Thread.State.TERMINATED)
751	>	fail("Unexpected thread termination");
752	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
753	>	threadAssertTrue(thread.isAlive());
754	>	return;
755		}
756	<	catch(Exception e) {
757	<	threadFail("unexpectedException");
756	>	Thread.yield();
757	>	}
758	>	}
759	>
760	>	/**
761	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
762	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
763	>	*/
764	>	void waitForThreadToEnterWaitState(Thread thread) {
765	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
766	>	}
767	>
768	>	/**
769	>	* Returns the number of milliseconds since time given by
770	>	* startNanoTime, which must have been previously returned from a
771	>	* call to {@link System.nanoTime()}.
772	>	*/
773	>	long millisElapsedSince(long startNanoTime) {
774	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
775	>	}
776	>
777	>	/**
778	>	* Returns a new started daemon Thread running the given runnable.
779	>	*/
780	>	Thread newStartedThread(Runnable runnable) {
781	>	Thread t = new Thread(runnable);
782	>	t.setDaemon(true);
783	>	t.start();
784	>	return t;
785	>	}
786	>
787	>	/**
788	>	* Waits for the specified time (in milliseconds) for the thread
789	>	* to terminate (using {@link Thread#join(long)}), else interrupts
790	>	* the thread (in the hope that it may terminate later) and fails.
791	>	*/
792	>	void awaitTermination(Thread t, long timeoutMillis) {
793	>	try {
794	>	t.join(timeoutMillis);
795	>	} catch (InterruptedException ie) {
796	>	threadUnexpectedException(ie);
797	>	} finally {
798	>	if (t.getState() != Thread.State.TERMINATED) {
799	>	t.interrupt();
800	>	fail("Test timed out");
801		}
802		}
803		}
804
805	<	public class ShortInterruptedRunnable implements Runnable {
806	<	public void run() {
805	>	/**
806	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
807	>	* terminate (using {@link Thread#join(long)}), else interrupts
808	>	* the thread (in the hope that it may terminate later) and fails.
809	>	*/
810	>	void awaitTermination(Thread t) {
811	>	awaitTermination(t, LONG_DELAY_MS);
812	>	}
813	>
814	>	// Some convenient Runnable classes
815	>
816	>	public abstract class CheckedRunnable implements Runnable {
817	>	protected abstract void realRun() throws Throwable;
818	>
819	>	public final void run() {
820		try {
821	<	Thread.sleep(SHORT_DELAY_MS);
822	<	threadFail("should throw IE");
821	>	realRun();
822	>	} catch (Throwable t) {
823	>	threadUnexpectedException(t);
824		}
825	<	catch(InterruptedException success) {
825	>	}
826	>	}
827	>
828	>	public abstract class RunnableShouldThrow implements Runnable {
829	>	protected abstract void realRun() throws Throwable;
830	>
831	>	final Class<?> exceptionClass;
832	>
833	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
834	>	this.exceptionClass = exceptionClass;
835	>	}
836	>
837	>	public final void run() {
838	>	try {
839	>	realRun();
840	>	threadShouldThrow(exceptionClass.getSimpleName());
841	>	} catch (Throwable t) {
842	>	if (! exceptionClass.isInstance(t))
843	>	threadUnexpectedException(t);
844		}
845		}
846		}
847
848	<	public class SmallRunnable implements Runnable {
849	<	public void run() {
848	>	public abstract class ThreadShouldThrow extends Thread {
849	>	protected abstract void realRun() throws Throwable;
850	>
851	>	final Class<?> exceptionClass;
852	>
853	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
854	>	this.exceptionClass = exceptionClass;
855	>	}
856	>
857	>	public final void run() {
858		try {
859	<	Thread.sleep(SMALL_DELAY_MS);
859	>	realRun();
860	>	threadShouldThrow(exceptionClass.getSimpleName());
861	>	} catch (Throwable t) {
862	>	if (! exceptionClass.isInstance(t))
863	>	threadUnexpectedException(t);
864		}
865	<	catch(Exception e) {
866	<	threadFail("unexpectedException");
865	>	}
866	>	}
867	>
868	>	public abstract class CheckedInterruptedRunnable implements Runnable {
869	>	protected abstract void realRun() throws Throwable;
870	>
871	>	public final void run() {
872	>	try {
873	>	realRun();
874	>	threadShouldThrow("InterruptedException");
875	>	} catch (InterruptedException success) {
876	>	threadAssertFalse(Thread.interrupted());
877	>	} catch (Throwable t) {
878	>	threadUnexpectedException(t);
879		}
880		}
881		}
882
883	<	public class SmallCallable implements Callable {
884	<	public Object call() {
883	>	public abstract class CheckedCallable<T> implements Callable<T> {
884	>	protected abstract T realCall() throws Throwable;
885	>
886	>	public final T call() {
887		try {
888	<	Thread.sleep(SMALL_DELAY_MS);
888	>	return realCall();
889	>	} catch (Throwable t) {
890	>	threadUnexpectedException(t);
891	>	return null;
892		}
893	<	catch(Exception e) {
894	<	threadFail("unexpectedException");
893	>	}
894	>	}
895	>
896	>	public abstract class CheckedInterruptedCallable<T>
897	>	implements Callable<T> {
898	>	protected abstract T realCall() throws Throwable;
899	>
900	>	public final T call() {
901	>	try {
902	>	T result = realCall();
903	>	threadShouldThrow("InterruptedException");
904	>	return result;
905	>	} catch (InterruptedException success) {
906	>	threadAssertFalse(Thread.interrupted());
907	>	} catch (Throwable t) {
908	>	threadUnexpectedException(t);
909		}
910	+	return null;
911	+	}
912	+	}
913	+
914	+	public static class NoOpRunnable implements Runnable {
915	+	public void run() {}
916	+	}
917	+
918	+	public static class NoOpCallable implements Callable {
919	+	public Object call() { return Boolean.TRUE; }
920	+	}
921	+
922	+	public static final String TEST_STRING = "a test string";
923	+
924	+	public static class StringTask implements Callable<String> {
925	+	public String call() { return TEST_STRING; }
926	+	}
927	+
928	+	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
929	+	return new CheckedCallable<String>() {
930	+	protected String realCall() {
931	+	try {
932	+	latch.await();
933	+	} catch (InterruptedException quittingTime) {}
934	+	return TEST_STRING;
935	+	}};
936	+	}
937	+
938	+	public Runnable awaiter(final CountDownLatch latch) {
939	+	return new CheckedRunnable() {
940	+	public void realRun() throws InterruptedException {
941	+	await(latch);
942	+	}};
943	+	}
944	+
945	+	public void await(CountDownLatch latch) {
946	+	try {
947	+	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
948	+	} catch (Throwable t) {
949	+	threadUnexpectedException(t);
950	+	}
951	+	}
952	+
953	+	public void await(Semaphore semaphore) {
954	+	try {
955	+	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
956	+	} catch (Throwable t) {
957	+	threadUnexpectedException(t);
958	+	}
959	+	}
960	+
961	+	//     /**
962	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
963	+	//      */
964	+	//     public void await(AtomicBoolean flag) {
965	+	//         await(flag, LONG_DELAY_MS);
966	+	//     }
967	+
968	+	//     /**
969	+	//      * Spin-waits up to the specified timeout until flag becomes true.
970	+	//      */
971	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
972	+	//         long startTime = System.nanoTime();
973	+	//         while (!flag.get()) {
974	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
975	+	//                 throw new AssertionFailedError("timed out");
976	+	//             Thread.yield();
977	+	//         }
978	+	//     }
979	+
980	+	public static class NPETask implements Callable<String> {
981	+	public String call() { throw new NullPointerException(); }
982	+	}
983	+
984	+	public static class CallableOne implements Callable<Integer> {
985	+	public Integer call() { return one; }
986	+	}
987	+
988	+	public class ShortRunnable extends CheckedRunnable {
989	+	protected void realRun() throws Throwable {
990	+	delay(SHORT_DELAY_MS);
991	+	}
992	+	}
993	+
994	+	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
995	+	protected void realRun() throws InterruptedException {
996	+	delay(SHORT_DELAY_MS);
997	+	}
998	+	}
999	+
1000	+	public class SmallRunnable extends CheckedRunnable {
1001	+	protected void realRun() throws Throwable {
1002	+	delay(SMALL_DELAY_MS);
1003	+	}
1004	+	}
1005	+
1006	+	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1007	+	protected void realRun() {
1008	+	try {
1009	+	delay(SMALL_DELAY_MS);
1010	+	} catch (InterruptedException ok) {}
1011	+	}
1012	+	}
1013	+
1014	+	public class SmallCallable extends CheckedCallable {
1015	+	protected Object realCall() throws InterruptedException {
1016	+	delay(SMALL_DELAY_MS);
1017		return Boolean.TRUE;
1018		}
1019		}
1020
1021	<	public class SmallInterruptedRunnable implements Runnable {
1021	>	public class MediumRunnable extends CheckedRunnable {
1022	>	protected void realRun() throws Throwable {
1023	>	delay(MEDIUM_DELAY_MS);
1024	>	}
1025	>	}
1026	>
1027	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1028	>	protected void realRun() throws InterruptedException {
1029	>	delay(MEDIUM_DELAY_MS);
1030	>	}
1031	>	}
1032	>
1033	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1034	>	return new CheckedRunnable() {
1035	>	protected void realRun() {
1036	>	try {
1037	>	delay(timeoutMillis);
1038	>	} catch (InterruptedException ok) {}
1039	>	}};
1040	>	}
1041	>
1042	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1043	>	protected void realRun() {
1044	>	try {
1045	>	delay(MEDIUM_DELAY_MS);
1046	>	} catch (InterruptedException ok) {}
1047	>	}
1048	>	}
1049	>
1050	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1051	>	protected void realRun() {
1052	>	try {
1053	>	delay(LONG_DELAY_MS);
1054	>	} catch (InterruptedException ok) {}
1055	>	}
1056	>	}
1057	>
1058	>	/**
1059	>	* For use as ThreadFactory in constructors
1060	>	*/
1061	>	public static class SimpleThreadFactory implements ThreadFactory {
1062	>	public Thread newThread(Runnable r) {
1063	>	return new Thread(r);
1064	>	}
1065	>	}
1066	>
1067	>	public interface TrackedRunnable extends Runnable {
1068	>	boolean isDone();
1069	>	}
1070	>
1071	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1072	>	return new TrackedRunnable() {
1073	>	private volatile boolean done = false;
1074	>	public boolean isDone() { return done; }
1075	>	public void run() {
1076	>	try {
1077	>	delay(timeoutMillis);
1078	>	done = true;
1079	>	} catch (InterruptedException ok) {}
1080	>	}
1081	>	};
1082	>	}
1083	>
1084	>	public static class TrackedShortRunnable implements Runnable {
1085	>	public volatile boolean done = false;
1086		public void run() {
1087		try {
1088	<	Thread.sleep(SMALL_DELAY_MS);
1089	<	threadFail("should throw IE");
1090	<	}
237	<	catch(InterruptedException success) {
238	<	}
1088	>	delay(SHORT_DELAY_MS);
1089	>	done = true;
1090	>	} catch (InterruptedException ok) {}
1091		}
1092		}
1093
1094	+	public static class TrackedSmallRunnable implements Runnable {
1095	+	public volatile boolean done = false;
1096	+	public void run() {
1097	+	try {
1098	+	delay(SMALL_DELAY_MS);
1099	+	done = true;
1100	+	} catch (InterruptedException ok) {}
1101	+	}
1102	+	}
1103
1104	<	public class MediumRunnable implements Runnable {
1104	>	public static class TrackedMediumRunnable implements Runnable {
1105	>	public volatile boolean done = false;
1106		public void run() {
1107		try {
1108	<	Thread.sleep(MEDIUM_DELAY_MS);
1109	<	}
1110	<	catch(Exception e) {
249	<	threadFail("unexpectedException");
250	<	}
1108	>	delay(MEDIUM_DELAY_MS);
1109	>	done = true;
1110	>	} catch (InterruptedException ok) {}
1111		}
1112		}
1113
1114	<	public class MediumInterruptedRunnable implements Runnable {
1114	>	public static class TrackedLongRunnable implements Runnable {
1115	>	public volatile boolean done = false;
1116		public void run() {
1117		try {
1118	<	Thread.sleep(MEDIUM_DELAY_MS);
1119	<	threadFail("should throw IE");
1120	<	}
260	<	catch(InterruptedException success) {
261	<	}
1118	>	delay(LONG_DELAY_MS);
1119	>	done = true;
1120	>	} catch (InterruptedException ok) {}
1121		}
1122		}
1123
1124	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1124	>	public static class TrackedNoOpRunnable implements Runnable {
1125	>	public volatile boolean done = false;
1126		public void run() {
1127	+	done = true;
1128	+	}
1129	+	}
1130	+
1131	+	public static class TrackedCallable implements Callable {
1132	+	public volatile boolean done = false;
1133	+	public Object call() {
1134		try {
1135	<	Thread.sleep(MEDIUM_DELAY_MS);
1135	>	delay(SMALL_DELAY_MS);
1136	>	done = true;
1137	>	} catch (InterruptedException ok) {}
1138	>	return Boolean.TRUE;
1139	>	}
1140	>	}
1141	>
1142	>	/**
1143	>	* Analog of CheckedRunnable for RecursiveAction
1144	>	*/
1145	>	public abstract class CheckedRecursiveAction extends RecursiveAction {
1146	>	protected abstract void realCompute() throws Throwable;
1147	>
1148	>	public final void compute() {
1149	>	try {
1150	>	realCompute();
1151	>	} catch (Throwable t) {
1152	>	threadUnexpectedException(t);
1153		}
1154	<	catch(InterruptedException success) {
1154	>	}
1155	>	}
1156	>
1157	>	/**
1158	>	* Analog of CheckedCallable for RecursiveTask
1159	>	*/
1160	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1161	>	protected abstract T realCompute() throws Throwable;
1162	>
1163	>	public final T compute() {
1164	>	try {
1165	>	return realCompute();
1166	>	} catch (Throwable t) {
1167	>	threadUnexpectedException(t);
1168	>	return null;
1169		}
1170		}
1171		}
1172	<
1172	>
1173	>	/**
1174	>	* For use as RejectedExecutionHandler in constructors
1175	>	*/
1176	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1177	>	public void rejectedExecution(Runnable r,
1178	>	ThreadPoolExecutor executor) {}
1179	>	}
1180	>
1181	>	/**
1182	>	* A CyclicBarrier that uses timed await and fails with
1183	>	* AssertionFailedErrors instead of throwing checked exceptions.
1184	>	*/
1185	>	public class CheckedBarrier extends CyclicBarrier {
1186	>	public CheckedBarrier(int parties) { super(parties); }
1187	>
1188	>	public int await() {
1189	>	try {
1190	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1191	>	} catch (TimeoutException e) {
1192	>	throw new AssertionFailedError("timed out");
1193	>	} catch (Exception e) {
1194	>	AssertionFailedError afe =
1195	>	new AssertionFailedError("Unexpected exception: " + e);
1196	>	afe.initCause(e);
1197	>	throw afe;
1198	>	}
1199	>	}
1200	>	}
1201	>
1202	>	void checkEmpty(BlockingQueue q) {
1203	>	try {
1204	>	assertTrue(q.isEmpty());
1205	>	assertEquals(0, q.size());
1206	>	assertNull(q.peek());
1207	>	assertNull(q.poll());
1208	>	assertNull(q.poll(0, MILLISECONDS));
1209	>	assertEquals(q.toString(), "[]");
1210	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1211	>	assertFalse(q.iterator().hasNext());
1212	>	try {
1213	>	q.element();
1214	>	shouldThrow();
1215	>	} catch (NoSuchElementException success) {}
1216	>	try {
1217	>	q.iterator().next();
1218	>	shouldThrow();
1219	>	} catch (NoSuchElementException success) {}
1220	>	try {
1221	>	q.remove();
1222	>	shouldThrow();
1223	>	} catch (NoSuchElementException success) {}
1224	>	} catch (InterruptedException ie) {
1225	>	threadUnexpectedException(ie);
1226	>	}
1227	>	}
1228	>
1229	>	void assertSerialEquals(Object x, Object y) {
1230	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1231	>	}
1232	>
1233	>	void assertNotSerialEquals(Object x, Object y) {
1234	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1235	>	}
1236	>
1237	>	byte[] serialBytes(Object o) {
1238	>	try {
1239	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1240	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1241	>	oos.writeObject(o);
1242	>	oos.flush();
1243	>	oos.close();
1244	>	return bos.toByteArray();
1245	>	} catch (Throwable t) {
1246	>	threadUnexpectedException(t);
1247	>	return new byte[0];
1248	>	}
1249	>	}
1250	>
1251	>	@SuppressWarnings("unchecked")
1252	>	<T> T serialClone(T o) {
1253	>	try {
1254	>	ObjectInputStream ois = new ObjectInputStream
1255	>	(new ByteArrayInputStream(serialBytes(o)));
1256	>	T clone = (T) ois.readObject();
1257	>	assertSame(o.getClass(), clone.getClass());
1258	>	return clone;
1259	>	} catch (Throwable t) {
1260	>	threadUnexpectedException(t);
1261	>	return null;
1262	>	}
1263	>	}
1264		}

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