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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.3 by dl, Sat Sep 20 18:20:08 2003 UTC vs.
Revision 1.91 by jsr166, Thu Dec 8 18:54:46 2011 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.Arrays;
15	>	import java.util.Date;
16	>	import java.util.NoSuchElementException;
17	>	import java.util.PropertyPermission;
18		import java.util.concurrent.*;
19	<	import java.io.*;
20	<
19	>	import java.util.concurrent.atomic.AtomicBoolean;
20	>	import java.util.concurrent.atomic.AtomicReference;
21	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
22	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
23	>	import java.security.CodeSource;
24	>	import java.security.Permission;
25	>	import java.security.PermissionCollection;
26	>	import java.security.Permissions;
27	>	import java.security.Policy;
28	>	import java.security.ProtectionDomain;
29	>	import java.security.SecurityPermission;
30
31		/**
32	<	* Base class for JSR166 Junit TCK tests.  Defines some constants and
33	<	* utility methods, as well as a simple framework for helping to make
34	<	* sure that assertions failing in generated threads cause the
35	<	* associated test that generated them to itself fail (which JUnit doe
36	<	* not otherwise arrange).  The rules for creating such tests are:
32	>	* Base class for JSR166 Junit TCK tests.  Defines some constants,
33	>	* utility methods and classes, as well as a simple framework for
34	>	* helping to make sure that assertions failing in generated threads
35	>	* cause the associated test that generated them to itself fail (which
36	>	* JUnit does not otherwise arrange).  The rules for creating such
37	>	* tests are:
38		*
39		* <ol>
40		*
41		* <li> All assertions in code running in generated threads must use
42	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
43	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
44	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
42	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
43	>	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
44	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
45		* particularly recommended) for other code to use these forms too.
46		* Only the most typically used JUnit assertion methods are defined
47		* this way, but enough to live with.</li>
48		*
49	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
50	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
49	>	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
50	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
51		* them. These methods are used to clear and check for thread
52		* assertion failures.</li>
53		*
54	<	* <li>All delays and timeouts must use one of the constants {@link
55	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
56	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
57	<	* discriminatable from zero time, and always allows enough time for
58	<	* the small amounts of computation (creating a thread, calling a few
54	>	* <li>All delays and timeouts must use one of the constants {@code
55	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
56	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
57	>	* discriminable from zero time, and always allows enough time for the
58	>	* small amounts of computation (creating a thread, calling a few
59		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
60		* is always discriminable as larger than SHORT and smaller than
61		* MEDIUM.  And so on. These constants are set to conservative values,
62		* but even so, if there is ever any doubt, they can all be increased
63	<	* in one spot to rerun tests on slower platforms</li>
63	>	* in one spot to rerun tests on slower platforms.</li>
64		*
65		* <li> All threads generated must be joined inside each test case
66	<	* method (or <tt>fail</tt> to do so) before returning from the
67	<	* method. The {@link joinPool} method can be used to do this when
66	>	* method (or {@code fail} to do so) before returning from the
67	>	* method. The {@code joinPool} method can be used to do this when
68		* using Executors.</li>
69		*
70		* </ol>
71	+	*
72	+	* <p> <b>Other notes</b>
73	+	* <ul>
74	+	*
75	+	* <li> Usually, there is one testcase method per JSR166 method
76	+	* covering "normal" operation, and then as many exception-testing
77	+	* methods as there are exceptions the method can throw. Sometimes
78	+	* there are multiple tests per JSR166 method when the different
79	+	* "normal" behaviors differ significantly. And sometimes testcases
80	+	* cover multiple methods when they cannot be tested in
81	+	* isolation.</li>
82	+	*
83	+	* <li> The documentation style for testcases is to provide as javadoc
84	+	* a simple sentence or two describing the property that the testcase
85	+	* method purports to test. The javadocs do not say anything about how
86	+	* the property is tested. To find out, read the code.</li>
87	+	*
88	+	* <li> These tests are "conformance tests", and do not attempt to
89	+	* test throughput, latency, scalability or other performance factors
90	+	* (see the separate "jtreg" tests for a set intended to check these
91	+	* for the most central aspects of functionality.) So, most tests use
92	+	* the smallest sensible numbers of threads, collection sizes, etc
93	+	* needed to check basic conformance.</li>
94	+	*
95	+	* <li>The test classes currently do not declare inclusion in
96	+	* any particular package to simplify things for people integrating
97	+	* them in TCK test suites.</li>
98	+	*
99	+	* <li> As a convenience, the {@code main} of this class (JSR166TestCase)
100	+	* runs all JSR166 unit tests.</li>
101	+	*
102	+	* </ul>
103		*/
104		public class JSR166TestCase extends TestCase {
105	+	private static final boolean useSecurityManager =
106	+	Boolean.getBoolean("jsr166.useSecurityManager");
107	+
108	+	protected static final boolean expensiveTests =
109	+	Boolean.getBoolean("jsr166.expensiveTests");
110	+
111	+	/**
112	+	* If true, report on stdout all "slow" tests, that is, ones that
113	+	* take more than profileThreshold milliseconds to execute.
114	+	*/
115	+	private static final boolean profileTests =
116	+	Boolean.getBoolean("jsr166.profileTests");
117	+
118	+	/**
119	+	* The number of milliseconds that tests are permitted for
120	+	* execution without being reported, when profileTests is set.
121	+	*/
122	+	private static final long profileThreshold =
123	+	Long.getLong("jsr166.profileThreshold", 100);
124	+
125	+	protected void runTest() throws Throwable {
126	+	if (profileTests)
127	+	runTestProfiled();
128	+	else
129	+	super.runTest();
130	+	}
131	+
132	+	protected void runTestProfiled() throws Throwable {
133	+	long t0 = System.nanoTime();
134	+	try {
135	+	super.runTest();
136	+	} finally {
137	+	long elapsedMillis =
138	+	(System.nanoTime() - t0) / (1000L * 1000L);
139	+	if (elapsedMillis >= profileThreshold)
140	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
141	+	}
142	+	}
143	+
144	+	/**
145	+	* Runs all JSR166 unit tests using junit.textui.TestRunner
146	+	*/
147	+	public static void main(String[] args) {
148	+	if (useSecurityManager) {
149	+	System.err.println("Setting a permissive security manager");
150	+	Policy.setPolicy(permissivePolicy());
151	+	System.setSecurityManager(new SecurityManager());
152	+	}
153	+	int iters = (args.length == 0) ? 1 : Integer.parseInt(args[0]);
154	+
155	+	Test s = suite();
156	+	for (int i = 0; i < iters; ++i) {
157	+	junit.textui.TestRunner.run(s);
158	+	System.gc();
159	+	System.runFinalization();
160	+	}
161	+	System.exit(0);
162	+	}
163	+
164	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
165	+	TestSuite suite = new TestSuite();
166	+	for (Object suiteOrClass : suiteOrClasses) {
167	+	if (suiteOrClass instanceof TestSuite)
168	+	suite.addTest((TestSuite) suiteOrClass);
169	+	else if (suiteOrClass instanceof Class)
170	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
171	+	else
172	+	throw new ClassCastException("not a test suite or class");
173	+	}
174	+	return suite;
175	+	}
176	+
177	+	/**
178	+	* Collects all JSR166 unit tests as one suite.
179	+	*/
180	+	public static Test suite() {
181	+	return newTestSuite(
182	+	ForkJoinPoolTest.suite(),
183	+	ForkJoinTaskTest.suite(),
184	+	RecursiveActionTest.suite(),
185	+	RecursiveTaskTest.suite(),
186	+	LinkedTransferQueueTest.suite(),
187	+	PhaserTest.suite(),
188	+	ThreadLocalRandomTest.suite(),
189	+	AbstractExecutorServiceTest.suite(),
190	+	AbstractQueueTest.suite(),
191	+	AbstractQueuedSynchronizerTest.suite(),
192	+	AbstractQueuedLongSynchronizerTest.suite(),
193	+	ArrayBlockingQueueTest.suite(),
194	+	ArrayDequeTest.suite(),
195	+	AtomicBooleanTest.suite(),
196	+	AtomicIntegerArrayTest.suite(),
197	+	AtomicIntegerFieldUpdaterTest.suite(),
198	+	AtomicIntegerTest.suite(),
199	+	AtomicLongArrayTest.suite(),
200	+	AtomicLongFieldUpdaterTest.suite(),
201	+	AtomicLongTest.suite(),
202	+	AtomicMarkableReferenceTest.suite(),
203	+	AtomicReferenceArrayTest.suite(),
204	+	AtomicReferenceFieldUpdaterTest.suite(),
205	+	AtomicReferenceTest.suite(),
206	+	AtomicStampedReferenceTest.suite(),
207	+	ConcurrentHashMapTest.suite(),
208	+	ConcurrentLinkedDequeTest.suite(),
209	+	ConcurrentLinkedQueueTest.suite(),
210	+	ConcurrentSkipListMapTest.suite(),
211	+	ConcurrentSkipListSubMapTest.suite(),
212	+	ConcurrentSkipListSetTest.suite(),
213	+	ConcurrentSkipListSubSetTest.suite(),
214	+	CopyOnWriteArrayListTest.suite(),
215	+	CopyOnWriteArraySetTest.suite(),
216	+	CountDownLatchTest.suite(),
217	+	CyclicBarrierTest.suite(),
218	+	DelayQueueTest.suite(),
219	+	EntryTest.suite(),
220	+	ExchangerTest.suite(),
221	+	ExecutorsTest.suite(),
222	+	ExecutorCompletionServiceTest.suite(),
223	+	FutureTaskTest.suite(),
224	+	LinkedBlockingDequeTest.suite(),
225	+	LinkedBlockingQueueTest.suite(),
226	+	LinkedListTest.suite(),
227	+	LockSupportTest.suite(),
228	+	PriorityBlockingQueueTest.suite(),
229	+	PriorityQueueTest.suite(),
230	+	ReentrantLockTest.suite(),
231	+	ReentrantReadWriteLockTest.suite(),
232	+	ScheduledExecutorTest.suite(),
233	+	ScheduledExecutorSubclassTest.suite(),
234	+	SemaphoreTest.suite(),
235	+	SynchronousQueueTest.suite(),
236	+	SystemTest.suite(),
237	+	ThreadLocalTest.suite(),
238	+	ThreadPoolExecutorTest.suite(),
239	+	ThreadPoolExecutorSubclassTest.suite(),
240	+	ThreadTest.suite(),
241	+	TimeUnitTest.suite(),
242	+	TreeMapTest.suite(),
243	+	TreeSetTest.suite(),
244	+	TreeSubMapTest.suite(),
245	+	TreeSubSetTest.suite());
246	+	}
247	+
248
249		public static long SHORT_DELAY_MS;
250		public static long SMALL_DELAY_MS;
#	Line 60 | Line 253 | public class JSR166TestCase extends Test
253
254
255		/**
256	<	* Return the shortest timed delay. This could
257	<	* be reimplmented to use for example a Property.
258	<	*/
256	>	* Returns the shortest timed delay. This could
257	>	* be reimplemented to use for example a Property.
258	>	*/
259		protected long getShortDelay() {
260		return 50;
261		}
262
70	–
263		/**
264	<	* Set delays as multiples fo SHORT_DELAY.
264	>	* Sets delays as multiples of SHORT_DELAY.
265		*/
266	<	protected  void setDelays() {
266	>	protected void setDelays() {
267		SHORT_DELAY_MS = getShortDelay();
268	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
268	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
269		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
270	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
270	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
271		}
272
273		/**
274	<	* Flag set true if any threadAssert methods fail
274	>	* Returns a timeout in milliseconds to be used in tests that
275	>	* verify that operations block or time out.
276		*/
277	<	protected volatile boolean threadFailed;
277	>	long timeoutMillis() {
278	>	return SHORT_DELAY_MS / 4;
279	>	}
280	>
281	>	/**
282	>	* Returns a new Date instance representing a time delayMillis
283	>	* milliseconds in the future.
284	>	*/
285	>	Date delayedDate(long delayMillis) {
286	>	return new Date(System.currentTimeMillis() + delayMillis);
287	>	}
288
289		/**
290	<	* Initialize test to indicat that no thread assertions have failed
290	>	* The first exception encountered if any threadAssertXXX method fails.
291		*/
292	<	public void setUp() {
292	>	private final AtomicReference<Throwable> threadFailure
293	>	= new AtomicReference<Throwable>(null);
294	>
295	>	/**
296	>	* Records an exception so that it can be rethrown later in the test
297	>	* harness thread, triggering a test case failure.  Only the first
298	>	* failure is recorded; subsequent calls to this method from within
299	>	* the same test have no effect.
300	>	*/
301	>	public void threadRecordFailure(Throwable t) {
302	>	threadFailure.compareAndSet(null, t);
303	>	}
304	>
305	>	public void setUp() {
306		setDelays();
91	–	threadFailed = false;
307		}
308
309		/**
310	<	* Trigger test case failure if any thread assertions have failed
310	>	* Extra checks that get done for all test cases.
311	>	*
312	>	* Triggers test case failure if any thread assertions have failed,
313	>	* by rethrowing, in the test harness thread, any exception recorded
314	>	* earlier by threadRecordFailure.
315	>	*
316	>	* Triggers test case failure if interrupt status is set in the main thread.
317		*/
318	<	public void tearDown() {
319	<	assertFalse(threadFailed);
318	>	public void tearDown() throws Exception {
319	>	Throwable t = threadFailure.getAndSet(null);
320	>	if (t != null) {
321	>	if (t instanceof Error)
322	>	throw (Error) t;
323	>	else if (t instanceof RuntimeException)
324	>	throw (RuntimeException) t;
325	>	else if (t instanceof Exception)
326	>	throw (Exception) t;
327	>	else {
328	>	AssertionFailedError afe =
329	>	new AssertionFailedError(t.toString());
330	>	afe.initCause(t);
331	>	throw afe;
332	>	}
333	>	}
334	>
335	>	if (Thread.interrupted())
336	>	throw new AssertionFailedError("interrupt status set in main thread");
337		}
338
339	+	/**
340	+	* Just like fail(reason), but additionally recording (using
341	+	* threadRecordFailure) any AssertionFailedError thrown, so that
342	+	* the current testcase will fail.
343	+	*/
344		public void threadFail(String reason) {
345	<	threadFailed = true;
346	<	fail(reason);
345	>	try {
346	>	fail(reason);
347	>	} catch (AssertionFailedError t) {
348	>	threadRecordFailure(t);
349	>	fail(reason);
350	>	}
351		}
352
353	+	/**
354	+	* Just like assertTrue(b), but additionally recording (using
355	+	* threadRecordFailure) any AssertionFailedError thrown, so that
356	+	* the current testcase will fail.
357	+	*/
358		public void threadAssertTrue(boolean b) {
359	<	if (!b) {
108	<	threadFailed = true;
359	>	try {
360		assertTrue(b);
361	+	} catch (AssertionFailedError t) {
362	+	threadRecordFailure(t);
363	+	throw t;
364		}
365		}
366	+
367	+	/**
368	+	* Just like assertFalse(b), but additionally recording (using
369	+	* threadRecordFailure) any AssertionFailedError thrown, so that
370	+	* the current testcase will fail.
371	+	*/
372		public void threadAssertFalse(boolean b) {
373	<	if (b) {
114	<	threadFailed = true;
373	>	try {
374		assertFalse(b);
375	+	} catch (AssertionFailedError t) {
376	+	threadRecordFailure(t);
377	+	throw t;
378		}
379		}
380	+
381	+	/**
382	+	* Just like assertNull(x), but additionally recording (using
383	+	* threadRecordFailure) any AssertionFailedError thrown, so that
384	+	* the current testcase will fail.
385	+	*/
386		public void threadAssertNull(Object x) {
387	<	if (x != null) {
120	<	threadFailed = true;
387	>	try {
388		assertNull(x);
389	+	} catch (AssertionFailedError t) {
390	+	threadRecordFailure(t);
391	+	throw t;
392		}
393		}
394	+
395	+	/**
396	+	* Just like assertEquals(x, y), but additionally recording (using
397	+	* threadRecordFailure) any AssertionFailedError thrown, so that
398	+	* the current testcase will fail.
399	+	*/
400		public void threadAssertEquals(long x, long y) {
401	<	if (x != y) {
126	<	threadFailed = true;
401	>	try {
402		assertEquals(x, y);
403	+	} catch (AssertionFailedError t) {
404	+	threadRecordFailure(t);
405	+	throw t;
406		}
407		}
408	+
409	+	/**
410	+	* Just like assertEquals(x, y), but additionally recording (using
411	+	* threadRecordFailure) any AssertionFailedError thrown, so that
412	+	* the current testcase will fail.
413	+	*/
414		public void threadAssertEquals(Object x, Object y) {
415	<	if (x != y && (x == null || !x.equals(y))) {
132	<	threadFailed = true;
415	>	try {
416		assertEquals(x, y);
417	+	} catch (AssertionFailedError t) {
418	+	threadRecordFailure(t);
419	+	throw t;
420	+	} catch (Throwable t) {
421	+	threadUnexpectedException(t);
422		}
423		}
424
425	+	/**
426	+	* Just like assertSame(x, y), but additionally recording (using
427	+	* threadRecordFailure) any AssertionFailedError thrown, so that
428	+	* the current testcase will fail.
429	+	*/
430	+	public void threadAssertSame(Object x, Object y) {
431	+	try {
432	+	assertSame(x, y);
433	+	} catch (AssertionFailedError t) {
434	+	threadRecordFailure(t);
435	+	throw t;
436	+	}
437	+	}
438	+
439	+	/**
440	+	* Calls threadFail with message "should throw exception".
441	+	*/
442		public void threadShouldThrow() {
443	<	threadFailed = true;
139	<	fail("should throw exception");
443	>	threadFail("should throw exception");
444		}
445
446	<	public void threadUnexpectedException() {
447	<	threadFailed = true;
448	<	fail("Unexpected exception");
446	>	/**
447	>	* Calls threadFail with message "should throw" + exceptionName.
448	>	*/
449	>	public void threadShouldThrow(String exceptionName) {
450	>	threadFail("should throw " + exceptionName);
451		}
452
453	+	/**
454	+	* Records the given exception using {@link #threadRecordFailure},
455	+	* then rethrows the exception, wrapping it in an
456	+	* AssertionFailedError if necessary.
457	+	*/
458	+	public void threadUnexpectedException(Throwable t) {
459	+	threadRecordFailure(t);
460	+	t.printStackTrace();
461	+	if (t instanceof RuntimeException)
462	+	throw (RuntimeException) t;
463	+	else if (t instanceof Error)
464	+	throw (Error) t;
465	+	else {
466	+	AssertionFailedError afe =
467	+	new AssertionFailedError("unexpected exception: " + t);
468	+	afe.initCause(t);
469	+	throw afe;
470	+	}
471	+	}
472
473		/**
474	<	* Wait out termination of a thread pool or fail doing so
474	>	* Delays, via Thread.sleep, for the given millisecond delay, but
475	>	* if the sleep is shorter than specified, may re-sleep or yield
476	>	* until time elapses.
477		*/
478	<	public void joinPool(ExecutorService exec) {
478	>	static void delay(long millis) throws InterruptedException {
479	>	long startTime = System.nanoTime();
480	>	long ns = millis * 1000 * 1000;
481	>	for (;;) {
482	>	if (millis > 0L)
483	>	Thread.sleep(millis);
484	>	else // too short to sleep
485	>	Thread.yield();
486	>	long d = ns - (System.nanoTime() - startTime);
487	>	if (d > 0L)
488	>	millis = d / (1000 * 1000);
489	>	else
490	>	break;
491	>	}
492	>	}
493	>
494	>	/**
495	>	* Waits out termination of a thread pool or fails doing so.
496	>	*/
497	>	void joinPool(ExecutorService exec) {
498		try {
499		exec.shutdown();
500	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
501	<	} catch(InterruptedException ie) {
502	<	fail("Unexpected exception");
500	>	assertTrue("ExecutorService did not terminate in a timely manner",
501	>	exec.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS));
502	>	} catch (SecurityException ok) {
503	>	// Allowed in case test doesn't have privs
504	>	} catch (InterruptedException ie) {
505	>	fail("Unexpected InterruptedException");
506	>	}
507	>	}
508	>
509	>	/**
510	>	* Checks that thread does not terminate within the default
511	>	* millisecond delay of {@code timeoutMillis()}.
512	>	*/
513	>	void assertThreadStaysAlive(Thread thread) {
514	>	assertThreadStaysAlive(thread, timeoutMillis());
515	>	}
516	>
517	>	/**
518	>	* Checks that thread does not terminate within the given millisecond delay.
519	>	*/
520	>	void assertThreadStaysAlive(Thread thread, long millis) {
521	>	try {
522	>	// No need to optimize the failing case via Thread.join.
523	>	delay(millis);
524	>	assertTrue(thread.isAlive());
525	>	} catch (InterruptedException ie) {
526	>	fail("Unexpected InterruptedException");
527	>	}
528	>	}
529	>
530	>	/**
531	>	* Checks that the threads do not terminate within the default
532	>	* millisecond delay of {@code timeoutMillis()}.
533	>	*/
534	>	void assertThreadsStayAlive(Thread... threads) {
535	>	assertThreadsStayAlive(timeoutMillis(), threads);
536	>	}
537	>
538	>	/**
539	>	* Checks that the threads do not terminate within the given millisecond delay.
540	>	*/
541	>	void assertThreadsStayAlive(long millis, Thread... threads) {
542	>	try {
543	>	// No need to optimize the failing case via Thread.join.
544	>	delay(millis);
545	>	for (Thread thread : threads)
546	>	assertTrue(thread.isAlive());
547	>	} catch (InterruptedException ie) {
548	>	fail("Unexpected InterruptedException");
549		}
550		}
551
552	<
552	>	/**
553	>	* Checks that future.get times out, with the default timeout of
554	>	* {@code timeoutMillis()}.
555	>	*/
556	>	void assertFutureTimesOut(Future future) {
557	>	assertFutureTimesOut(future, timeoutMillis());
558	>	}
559	>
560	>	/**
561	>	* Checks that future.get times out, with the given millisecond timeout.
562	>	*/
563	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
564	>	long startTime = System.nanoTime();
565	>	try {
566	>	future.get(timeoutMillis, MILLISECONDS);
567	>	shouldThrow();
568	>	} catch (TimeoutException success) {
569	>	} catch (Exception e) {
570	>	threadUnexpectedException(e);
571	>	} finally { future.cancel(true); }
572	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
573	>	}
574	>
575	>	/**
576	>	* Fails with message "should throw exception".
577	>	*/
578		public void shouldThrow() {
579		fail("Should throw exception");
580		}
581
582	<	public void unexpectedException() {
583	<	fail("Unexpected exception");
582	>	/**
583	>	* Fails with message "should throw " + exceptionName.
584	>	*/
585	>	public void shouldThrow(String exceptionName) {
586	>	fail("Should throw " + exceptionName);
587		}
588
169	–
589		/**
590		* The number of elements to place in collections, arrays, etc.
591		*/
#	Line 174 | Line 593 | public class JSR166TestCase extends Test
593
594		// Some convenient Integer constants
595
596	<	public static final Integer zero = new Integer(0);
597	<	public static final Integer one = new Integer(1);
598	<	public static final Integer two = new Integer(2);
599	<	public static final Integer three  = new Integer(3);
596	>	public static final Integer zero  = new Integer(0);
597	>	public static final Integer one   = new Integer(1);
598	>	public static final Integer two   = new Integer(2);
599	>	public static final Integer three = new Integer(3);
600		public static final Integer four  = new Integer(4);
601		public static final Integer five  = new Integer(5);
602	<	public static final Integer six = new Integer(6);
602	>	public static final Integer six   = new Integer(6);
603		public static final Integer seven = new Integer(7);
604		public static final Integer eight = new Integer(8);
605	<	public static final Integer nine = new Integer(9);
605	>	public static final Integer nine  = new Integer(9);
606		public static final Integer m1  = new Integer(-1);
607		public static final Integer m2  = new Integer(-2);
608		public static final Integer m3  = new Integer(-3);
609	<	public static final Integer m4 = new Integer(-4);
610	<	public static final Integer m5 = new Integer(-5);
609	>	public static final Integer m4  = new Integer(-4);
610	>	public static final Integer m5  = new Integer(-5);
611	>	public static final Integer m6  = new Integer(-6);
612		public static final Integer m10 = new Integer(-10);
613
614
615	<	// Some convenient Runnable classes
615	>	/**
616	>	* Runs Runnable r with a security policy that permits precisely
617	>	* the specified permissions.  If there is no current security
618	>	* manager, the runnable is run twice, both with and without a
619	>	* security manager.  We require that any security manager permit
620	>	* getPolicy/setPolicy.
621	>	*/
622	>	public void runWithPermissions(Runnable r, Permission... permissions) {
623	>	SecurityManager sm = System.getSecurityManager();
624	>	if (sm == null) {
625	>	r.run();
626	>	Policy savedPolicy = Policy.getPolicy();
627	>	try {
628	>	Policy.setPolicy(permissivePolicy());
629	>	System.setSecurityManager(new SecurityManager());
630	>	runWithPermissions(r, permissions);
631	>	} finally {
632	>	System.setSecurityManager(null);
633	>	Policy.setPolicy(savedPolicy);
634	>	}
635	>	} else {
636	>	Policy savedPolicy = Policy.getPolicy();
637	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
638	>	Policy.setPolicy(policy);
639
640	<	public static class NoOpRunnable implements Runnable {
641	<	public void run() {}
640	>	try {
641	>	r.run();
642	>	} finally {
643	>	policy.addPermission(new SecurityPermission("setPolicy"));
644	>	Policy.setPolicy(savedPolicy);
645	>	}
646	>	}
647		}
648
649	<	public static class NoOpCallable implements Callable {
650	<	public Object call() { return Boolean.TRUE; }
649	>	/**
650	>	* Runs a runnable without any permissions.
651	>	*/
652	>	public void runWithoutPermissions(Runnable r) {
653	>	runWithPermissions(r);
654		}
655
656	<	public class ShortRunnable implements Runnable {
657	<	public void run() {
658	<	try {
659	<	Thread.sleep(SHORT_DELAY_MS);
656	>	/**
657	>	* A security policy where new permissions can be dynamically added
658	>	* or all cleared.
659	>	*/
660	>	public static class AdjustablePolicy extends java.security.Policy {
661	>	Permissions perms = new Permissions();
662	>	AdjustablePolicy(Permission... permissions) {
663	>	for (Permission permission : permissions)
664	>	perms.add(permission);
665	>	}
666	>	void addPermission(Permission perm) { perms.add(perm); }
667	>	void clearPermissions() { perms = new Permissions(); }
668	>	public PermissionCollection getPermissions(CodeSource cs) {
669	>	return perms;
670	>	}
671	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
672	>	return perms;
673	>	}
674	>	public boolean implies(ProtectionDomain pd, Permission p) {
675	>	return perms.implies(p);
676	>	}
677	>	public void refresh() {}
678	>	}
679	>
680	>	/**
681	>	* Returns a policy containing all the permissions we ever need.
682	>	*/
683	>	public static Policy permissivePolicy() {
684	>	return new AdjustablePolicy
685	>	// Permissions j.u.c. needs directly
686	>	(new RuntimePermission("modifyThread"),
687	>	new RuntimePermission("getClassLoader"),
688	>	new RuntimePermission("setContextClassLoader"),
689	>	// Permissions needed to change permissions!
690	>	new SecurityPermission("getPolicy"),
691	>	new SecurityPermission("setPolicy"),
692	>	new RuntimePermission("setSecurityManager"),
693	>	// Permissions needed by the junit test harness
694	>	new RuntimePermission("accessDeclaredMembers"),
695	>	new PropertyPermission("*", "read"),
696	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
697	>	}
698	>
699	>	/**
700	>	* Sleeps until the given time has elapsed.
701	>	* Throws AssertionFailedError if interrupted.
702	>	*/
703	>	void sleep(long millis) {
704	>	try {
705	>	delay(millis);
706	>	} catch (InterruptedException ie) {
707	>	AssertionFailedError afe =
708	>	new AssertionFailedError("Unexpected InterruptedException");
709	>	afe.initCause(ie);
710	>	throw afe;
711	>	}
712	>	}
713	>
714	>	/**
715	>	* Spin-waits up to the specified number of milliseconds for the given
716	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
717	>	*/
718	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
719	>	long startTime = System.nanoTime();
720	>	for (;;) {
721	>	Thread.State s = thread.getState();
722	>	if (s == Thread.State.BLOCKED ||
723	>	s == Thread.State.WAITING ||
724	>	s == Thread.State.TIMED_WAITING)
725	>	return;
726	>	else if (s == Thread.State.TERMINATED)
727	>	fail("Unexpected thread termination");
728	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
729	>	threadAssertTrue(thread.isAlive());
730	>	return;
731		}
732	<	catch(Exception e) {
733	<	threadUnexpectedException();
732	>	Thread.yield();
733	>	}
734	>	}
735	>
736	>	/**
737	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
738	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
739	>	*/
740	>	void waitForThreadToEnterWaitState(Thread thread) {
741	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
742	>	}
743	>
744	>	/**
745	>	* Returns the number of milliseconds since time given by
746	>	* startNanoTime, which must have been previously returned from a
747	>	* call to {@link System.nanoTime()}.
748	>	*/
749	>	long millisElapsedSince(long startNanoTime) {
750	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
751	>	}
752	>
753	>	/**
754	>	* Returns a new started daemon Thread running the given runnable.
755	>	*/
756	>	Thread newStartedThread(Runnable runnable) {
757	>	Thread t = new Thread(runnable);
758	>	t.setDaemon(true);
759	>	t.start();
760	>	return t;
761	>	}
762	>
763	>	/**
764	>	* Waits for the specified time (in milliseconds) for the thread
765	>	* to terminate (using {@link Thread#join(long)}), else interrupts
766	>	* the thread (in the hope that it may terminate later) and fails.
767	>	*/
768	>	void awaitTermination(Thread t, long timeoutMillis) {
769	>	try {
770	>	t.join(timeoutMillis);
771	>	} catch (InterruptedException ie) {
772	>	threadUnexpectedException(ie);
773	>	} finally {
774	>	if (t.getState() != Thread.State.TERMINATED) {
775	>	t.interrupt();
776	>	fail("Test timed out");
777		}
778		}
779		}
780
781	<	public class ShortInterruptedRunnable implements Runnable {
782	<	public void run() {
781	>	/**
782	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
783	>	* terminate (using {@link Thread#join(long)}), else interrupts
784	>	* the thread (in the hope that it may terminate later) and fails.
785	>	*/
786	>	void awaitTermination(Thread t) {
787	>	awaitTermination(t, LONG_DELAY_MS);
788	>	}
789	>
790	>	// Some convenient Runnable classes
791	>
792	>	public abstract class CheckedRunnable implements Runnable {
793	>	protected abstract void realRun() throws Throwable;
794	>
795	>	public final void run() {
796		try {
797	<	Thread.sleep(SHORT_DELAY_MS);
798	<	threadShouldThrow();
797	>	realRun();
798	>	} catch (Throwable t) {
799	>	threadUnexpectedException(t);
800		}
801	<	catch(InterruptedException success) {
801	>	}
802	>	}
803	>
804	>	public abstract class RunnableShouldThrow implements Runnable {
805	>	protected abstract void realRun() throws Throwable;
806	>
807	>	final Class<?> exceptionClass;
808	>
809	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
810	>	this.exceptionClass = exceptionClass;
811	>	}
812	>
813	>	public final void run() {
814	>	try {
815	>	realRun();
816	>	threadShouldThrow(exceptionClass.getSimpleName());
817	>	} catch (Throwable t) {
818	>	if (! exceptionClass.isInstance(t))
819	>	threadUnexpectedException(t);
820		}
821		}
822		}
823
824	<	public class SmallRunnable implements Runnable {
825	<	public void run() {
824	>	public abstract class ThreadShouldThrow extends Thread {
825	>	protected abstract void realRun() throws Throwable;
826	>
827	>	final Class<?> exceptionClass;
828	>
829	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
830	>	this.exceptionClass = exceptionClass;
831	>	}
832	>
833	>	public final void run() {
834		try {
835	<	Thread.sleep(SMALL_DELAY_MS);
835	>	realRun();
836	>	threadShouldThrow(exceptionClass.getSimpleName());
837	>	} catch (Throwable t) {
838	>	if (! exceptionClass.isInstance(t))
839	>	threadUnexpectedException(t);
840		}
841	<	catch(Exception e) {
842	<	threadUnexpectedException();
841	>	}
842	>	}
843	>
844	>	public abstract class CheckedInterruptedRunnable implements Runnable {
845	>	protected abstract void realRun() throws Throwable;
846	>
847	>	public final void run() {
848	>	try {
849	>	realRun();
850	>	threadShouldThrow("InterruptedException");
851	>	} catch (InterruptedException success) {
852	>	threadAssertFalse(Thread.interrupted());
853	>	} catch (Throwable t) {
854	>	threadUnexpectedException(t);
855		}
856		}
857		}
858
859	<	public class SmallCallable implements Callable {
860	<	public Object call() {
859	>	public abstract class CheckedCallable<T> implements Callable<T> {
860	>	protected abstract T realCall() throws Throwable;
861	>
862	>	public final T call() {
863		try {
864	<	Thread.sleep(SMALL_DELAY_MS);
864	>	return realCall();
865	>	} catch (Throwable t) {
866	>	threadUnexpectedException(t);
867	>	return null;
868		}
869	<	catch(Exception e) {
870	<	threadUnexpectedException();
869	>	}
870	>	}
871	>
872	>	public abstract class CheckedInterruptedCallable<T>
873	>	implements Callable<T> {
874	>	protected abstract T realCall() throws Throwable;
875	>
876	>	public final T call() {
877	>	try {
878	>	T result = realCall();
879	>	threadShouldThrow("InterruptedException");
880	>	return result;
881	>	} catch (InterruptedException success) {
882	>	threadAssertFalse(Thread.interrupted());
883	>	} catch (Throwable t) {
884	>	threadUnexpectedException(t);
885		}
886	+	return null;
887	+	}
888	+	}
889	+
890	+	public static class NoOpRunnable implements Runnable {
891	+	public void run() {}
892	+	}
893	+
894	+	public static class NoOpCallable implements Callable {
895	+	public Object call() { return Boolean.TRUE; }
896	+	}
897	+
898	+	public static final String TEST_STRING = "a test string";
899	+
900	+	public static class StringTask implements Callable<String> {
901	+	public String call() { return TEST_STRING; }
902	+	}
903	+
904	+	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
905	+	return new CheckedCallable<String>() {
906	+	protected String realCall() {
907	+	try {
908	+	latch.await();
909	+	} catch (InterruptedException quittingTime) {}
910	+	return TEST_STRING;
911	+	}};
912	+	}
913	+
914	+	public Runnable awaiter(final CountDownLatch latch) {
915	+	return new CheckedRunnable() {
916	+	public void realRun() throws InterruptedException {
917	+	await(latch);
918	+	}};
919	+	}
920	+
921	+	public void await(CountDownLatch latch) {
922	+	try {
923	+	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
924	+	} catch (Throwable t) {
925	+	threadUnexpectedException(t);
926	+	}
927	+	}
928	+
929	+	public void await(Semaphore semaphore) {
930	+	try {
931	+	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
932	+	} catch (Throwable t) {
933	+	threadUnexpectedException(t);
934	+	}
935	+	}
936	+
937	+	//     /**
938	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
939	+	//      */
940	+	//     public void await(AtomicBoolean flag) {
941	+	//         await(flag, LONG_DELAY_MS);
942	+	//     }
943	+
944	+	//     /**
945	+	//      * Spin-waits up to the specified timeout until flag becomes true.
946	+	//      */
947	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
948	+	//         long startTime = System.nanoTime();
949	+	//         while (!flag.get()) {
950	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
951	+	//                 throw new AssertionFailedError("timed out");
952	+	//             Thread.yield();
953	+	//         }
954	+	//     }
955	+
956	+	public static class NPETask implements Callable<String> {
957	+	public String call() { throw new NullPointerException(); }
958	+	}
959	+
960	+	public static class CallableOne implements Callable<Integer> {
961	+	public Integer call() { return one; }
962	+	}
963	+
964	+	public class ShortRunnable extends CheckedRunnable {
965	+	protected void realRun() throws Throwable {
966	+	delay(SHORT_DELAY_MS);
967	+	}
968	+	}
969	+
970	+	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
971	+	protected void realRun() throws InterruptedException {
972	+	delay(SHORT_DELAY_MS);
973	+	}
974	+	}
975	+
976	+	public class SmallRunnable extends CheckedRunnable {
977	+	protected void realRun() throws Throwable {
978	+	delay(SMALL_DELAY_MS);
979	+	}
980	+	}
981	+
982	+	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
983	+	protected void realRun() {
984	+	try {
985	+	delay(SMALL_DELAY_MS);
986	+	} catch (InterruptedException ok) {}
987	+	}
988	+	}
989	+
990	+	public class SmallCallable extends CheckedCallable {
991	+	protected Object realCall() throws InterruptedException {
992	+	delay(SMALL_DELAY_MS);
993		return Boolean.TRUE;
994		}
995		}
996
997	<	public class SmallInterruptedRunnable implements Runnable {
997	>	public class MediumRunnable extends CheckedRunnable {
998	>	protected void realRun() throws Throwable {
999	>	delay(MEDIUM_DELAY_MS);
1000	>	}
1001	>	}
1002	>
1003	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1004	>	protected void realRun() throws InterruptedException {
1005	>	delay(MEDIUM_DELAY_MS);
1006	>	}
1007	>	}
1008	>
1009	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1010	>	return new CheckedRunnable() {
1011	>	protected void realRun() {
1012	>	try {
1013	>	delay(timeoutMillis);
1014	>	} catch (InterruptedException ok) {}
1015	>	}};
1016	>	}
1017	>
1018	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1019	>	protected void realRun() {
1020	>	try {
1021	>	delay(MEDIUM_DELAY_MS);
1022	>	} catch (InterruptedException ok) {}
1023	>	}
1024	>	}
1025	>
1026	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1027	>	protected void realRun() {
1028	>	try {
1029	>	delay(LONG_DELAY_MS);
1030	>	} catch (InterruptedException ok) {}
1031	>	}
1032	>	}
1033	>
1034	>	/**
1035	>	* For use as ThreadFactory in constructors
1036	>	*/
1037	>	public static class SimpleThreadFactory implements ThreadFactory {
1038	>	public Thread newThread(Runnable r) {
1039	>	return new Thread(r);
1040	>	}
1041	>	}
1042	>
1043	>	public interface TrackedRunnable extends Runnable {
1044	>	boolean isDone();
1045	>	}
1046	>
1047	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1048	>	return new TrackedRunnable() {
1049	>	private volatile boolean done = false;
1050	>	public boolean isDone() { return done; }
1051	>	public void run() {
1052	>	try {
1053	>	delay(timeoutMillis);
1054	>	done = true;
1055	>	} catch (InterruptedException ok) {}
1056	>	}
1057	>	};
1058	>	}
1059	>
1060	>	public static class TrackedShortRunnable implements Runnable {
1061	>	public volatile boolean done = false;
1062		public void run() {
1063		try {
1064	<	Thread.sleep(SMALL_DELAY_MS);
1065	<	threadShouldThrow();
1066	<	}
256	<	catch(InterruptedException success) {
257	<	}
1064	>	delay(SHORT_DELAY_MS);
1065	>	done = true;
1066	>	} catch (InterruptedException ok) {}
1067		}
1068		}
1069
1070	+	public static class TrackedSmallRunnable implements Runnable {
1071	+	public volatile boolean done = false;
1072	+	public void run() {
1073	+	try {
1074	+	delay(SMALL_DELAY_MS);
1075	+	done = true;
1076	+	} catch (InterruptedException ok) {}
1077	+	}
1078	+	}
1079
1080	<	public class MediumRunnable implements Runnable {
1080	>	public static class TrackedMediumRunnable implements Runnable {
1081	>	public volatile boolean done = false;
1082		public void run() {
1083		try {
1084	<	Thread.sleep(MEDIUM_DELAY_MS);
1085	<	}
1086	<	catch(Exception e) {
268	<	threadUnexpectedException();
269	<	}
1084	>	delay(MEDIUM_DELAY_MS);
1085	>	done = true;
1086	>	} catch (InterruptedException ok) {}
1087		}
1088		}
1089
1090	<	public class MediumInterruptedRunnable implements Runnable {
1090	>	public static class TrackedLongRunnable implements Runnable {
1091	>	public volatile boolean done = false;
1092		public void run() {
1093		try {
1094	<	Thread.sleep(MEDIUM_DELAY_MS);
1095	<	threadShouldThrow();
1096	<	}
279	<	catch(InterruptedException success) {
280	<	}
1094	>	delay(LONG_DELAY_MS);
1095	>	done = true;
1096	>	} catch (InterruptedException ok) {}
1097		}
1098		}
1099
1100	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1100	>	public static class TrackedNoOpRunnable implements Runnable {
1101	>	public volatile boolean done = false;
1102		public void run() {
1103	+	done = true;
1104	+	}
1105	+	}
1106	+
1107	+	public static class TrackedCallable implements Callable {
1108	+	public volatile boolean done = false;
1109	+	public Object call() {
1110	+	try {
1111	+	delay(SMALL_DELAY_MS);
1112	+	done = true;
1113	+	} catch (InterruptedException ok) {}
1114	+	return Boolean.TRUE;
1115	+	}
1116	+	}
1117	+
1118	+	/**
1119	+	* Analog of CheckedRunnable for RecursiveAction
1120	+	*/
1121	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1122	+	protected abstract void realCompute() throws Throwable;
1123	+
1124	+	public final void compute() {
1125		try {
1126	<	Thread.sleep(MEDIUM_DELAY_MS);
1126	>	realCompute();
1127	>	} catch (Throwable t) {
1128	>	threadUnexpectedException(t);
1129		}
1130	<	catch(InterruptedException success) {
1130	>	}
1131	>	}
1132	>
1133	>	/**
1134	>	* Analog of CheckedCallable for RecursiveTask
1135	>	*/
1136	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1137	>	protected abstract T realCompute() throws Throwable;
1138	>
1139	>	public final T compute() {
1140	>	try {
1141	>	return realCompute();
1142	>	} catch (Throwable t) {
1143	>	threadUnexpectedException(t);
1144	>	return null;
1145	>	}
1146	>	}
1147	>	}
1148	>
1149	>	/**
1150	>	* For use as RejectedExecutionHandler in constructors
1151	>	*/
1152	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1153	>	public void rejectedExecution(Runnable r,
1154	>	ThreadPoolExecutor executor) {}
1155	>	}
1156	>
1157	>	/**
1158	>	* A CyclicBarrier that uses timed await and fails with
1159	>	* AssertionFailedErrors instead of throwing checked exceptions.
1160	>	*/
1161	>	public class CheckedBarrier extends CyclicBarrier {
1162	>	public CheckedBarrier(int parties) { super(parties); }
1163	>
1164	>	public int await() {
1165	>	try {
1166	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1167	>	} catch (TimeoutException e) {
1168	>	throw new AssertionFailedError("timed out");
1169	>	} catch (Exception e) {
1170	>	AssertionFailedError afe =
1171	>	new AssertionFailedError("Unexpected exception: " + e);
1172	>	afe.initCause(e);
1173	>	throw afe;
1174		}
1175		}
1176		}
1177	<
1177	>
1178	>	void checkEmpty(BlockingQueue q) {
1179	>	try {
1180	>	assertTrue(q.isEmpty());
1181	>	assertEquals(0, q.size());
1182	>	assertNull(q.peek());
1183	>	assertNull(q.poll());
1184	>	assertNull(q.poll(0, MILLISECONDS));
1185	>	assertEquals(q.toString(), "[]");
1186	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1187	>	assertFalse(q.iterator().hasNext());
1188	>	try {
1189	>	q.element();
1190	>	shouldThrow();
1191	>	} catch (NoSuchElementException success) {}
1192	>	try {
1193	>	q.iterator().next();
1194	>	shouldThrow();
1195	>	} catch (NoSuchElementException success) {}
1196	>	try {
1197	>	q.remove();
1198	>	shouldThrow();
1199	>	} catch (NoSuchElementException success) {}
1200	>	} catch (InterruptedException ie) {
1201	>	threadUnexpectedException(ie);
1202	>	}
1203	>	}
1204	>
1205	>	void assertSerialEquals(Object x, Object y) {
1206	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1207	>	}
1208	>
1209	>	void assertNotSerialEquals(Object x, Object y) {
1210	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1211	>	}
1212	>
1213	>	byte[] serialBytes(Object o) {
1214	>	try {
1215	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1216	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1217	>	oos.writeObject(o);
1218	>	oos.flush();
1219	>	oos.close();
1220	>	return bos.toByteArray();
1221	>	} catch (Throwable t) {
1222	>	threadUnexpectedException(t);
1223	>	return new byte[0];
1224	>	}
1225	>	}
1226	>
1227	>	@SuppressWarnings("unchecked")
1228	>	<T> T serialClone(T o) {
1229	>	try {
1230	>	ObjectInputStream ois = new ObjectInputStream
1231	>	(new ByteArrayInputStream(serialBytes(o)));
1232	>	T clone = (T) ois.readObject();
1233	>	assertSame(o.getClass(), clone.getClass());
1234	>	return clone;
1235	>	} catch (Throwable t) {
1236	>	threadUnexpectedException(t);
1237	>	return null;
1238	>	}
1239	>	}
1240		}

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