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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.42 by jsr166, Sat Nov 21 02:07:26 2009 UTC vs.
Revision 1.79 by jsr166, Mon May 9 20:00:19 2011 UTC

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

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