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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.23 by dl, Tue Dec 28 16:15:59 2004 UTC vs.
Revision 1.77 by jsr166, Fri May 6 17:26:29 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
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	<	import java.util.*;
10	>	import java.util.Arrays;
11	>	import java.util.NoSuchElementException;
12	>	import java.util.PropertyPermission;
13		import java.util.concurrent.*;
14	<	import java.io.*;
15	<	import java.security.*;
14	>	import java.util.concurrent.atomic.AtomicReference;
15	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
16	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
17	>	import java.security.CodeSource;
18	>	import java.security.Permission;
19	>	import java.security.PermissionCollection;
20	>	import java.security.Permissions;
21	>	import java.security.Policy;
22	>	import java.security.ProtectionDomain;
23	>	import java.security.SecurityPermission;
24
25		/**
26		* Base class for JSR166 Junit TCK tests.  Defines some constants,
27		* utility methods and classes, as well as a simple framework for
28		* helping to make sure that assertions failing in generated threads
29		* cause the associated test that generated them to itself fail (which
30	<	* JUnit doe not otherwise arrange).  The rules for creating such
30	>	* JUnit does not otherwise arrange).  The rules for creating such
31		* tests are:
32		*
33		* <ol>
34		*
35		* <li> All assertions in code running in generated threads must use
36	<	* the forms {@link #threadFail} , {@link #threadAssertTrue} {@link
36	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
37		* #threadAssertEquals}, or {@link #threadAssertNull}, (not
38	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
38	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
39		* particularly recommended) for other code to use these forms too.
40		* Only the most typically used JUnit assertion methods are defined
41		* this way, but enough to live with.</li>
42		*
43		* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
44	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
44	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
45		* them. These methods are used to clear and check for thread
46		* assertion failures.</li>
47		*
48	<	* <li>All delays and timeouts must use one of the constants <tt>
49	<	* SHORT_DELAY_MS</tt>, <tt> SMALL_DELAY_MS</tt>, <tt> MEDIUM_DELAY_MS</tt>,
50	<	* <tt> LONG_DELAY_MS</tt>. The idea here is that a SHORT is always
48	>	* <li>All delays and timeouts must use one of the constants {@code
49	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
50	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
51		* discriminable from zero time, and always allows enough time for the
52		* small amounts of computation (creating a thread, calling a few
53		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
54		* is always discriminable as larger than SHORT and smaller than
55		* MEDIUM.  And so on. These constants are set to conservative values,
56		* but even so, if there is ever any doubt, they can all be increased
57	<	* in one spot to rerun tests on slower platforms</li>
57	>	* in one spot to rerun tests on slower platforms.</li>
58		*
59		* <li> All threads generated must be joined inside each test case
60	<	* method (or <tt>fail</tt> to do so) before returning from the
61	<	* method. The <tt> joinPool</tt> method can be used to do this when
60	>	* method (or {@code fail} to do so) before returning from the
61	>	* method. The {@code joinPool} method can be used to do this when
62		* using Executors.</li>
63		*
64		* </ol>
#	Line 63 | Line 73 | import java.security.*;
73		* "normal" behaviors differ significantly. And sometimes testcases
74		* cover multiple methods when they cannot be tested in
75		* isolation.</li>
76	<	*
76	>	*
77		* <li> The documentation style for testcases is to provide as javadoc
78		* a simple sentence or two describing the property that the testcase
79		* method purports to test. The javadocs do not say anything about how
#	Line 80 | Line 90 | import java.security.*;
90		* any particular package to simplify things for people integrating
91		* them in TCK test suites.</li>
92		*
93	<	* <li> As a convenience, the <tt>main</tt> of this class (JSR166TestCase)
93	>	* <li> As a convenience, the {@code main} of this class (JSR166TestCase)
94		* runs all JSR166 unit tests.</li>
95		*
96		* </ul>
97		*/
98		public class JSR166TestCase extends TestCase {
99	+	private static final boolean useSecurityManager =
100	+	Boolean.getBoolean("jsr166.useSecurityManager");
101	+
102	+	protected static final boolean expensiveTests =
103	+	Boolean.getBoolean("jsr166.expensiveTests");
104	+
105	+	/**
106	+	* If true, report on stdout all "slow" tests, that is, ones that
107	+	* take more than profileThreshold milliseconds to execute.
108	+	*/
109	+	private static final boolean profileTests =
110	+	Boolean.getBoolean("jsr166.profileTests");
111	+
112	+	/**
113	+	* The number of milliseconds that tests are permitted for
114	+	* execution without being reported, when profileTests is set.
115	+	*/
116	+	private static final long profileThreshold =
117	+	Long.getLong("jsr166.profileThreshold", 100);
118	+
119	+	protected void runTest() throws Throwable {
120	+	if (profileTests)
121	+	runTestProfiled();
122	+	else
123	+	super.runTest();
124	+	}
125	+
126	+	protected void runTestProfiled() throws Throwable {
127	+	long t0 = System.nanoTime();
128	+	try {
129	+	super.runTest();
130	+	} finally {
131	+	long elapsedMillis =
132	+	(System.nanoTime() - t0) / (1000L * 1000L);
133	+	if (elapsedMillis >= profileThreshold)
134	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
135	+	}
136	+	}
137	+
138		/**
139		* Runs all JSR166 unit tests using junit.textui.TestRunner
140	<	*/
141	<	public static void main (String[] args) {
142	<	int iters = 1;
143	<	if (args.length > 0)
144	<	iters = Integer.parseInt(args[0]);
140	>	*/
141	>	public static void main(String[] args) {
142	>	if (useSecurityManager) {
143	>	System.err.println("Setting a permissive security manager");
144	>	Policy.setPolicy(permissivePolicy());
145	>	System.setSecurityManager(new SecurityManager());
146	>	}
147	>	int iters = (args.length == 0) ? 1 : Integer.parseInt(args[0]);
148	>
149		Test s = suite();
150		for (int i = 0; i < iters; ++i) {
151	<	junit.textui.TestRunner.run (s);
151	>	junit.textui.TestRunner.run(s);
152		System.gc();
153		System.runFinalization();
154		}
155		System.exit(0);
156		}
157
158	<	/**
159	<	* Collects all JSR166 unit tests as one suite
160	<	*/
161	<	public static Test suite ( ) {
162	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
163	<
164	<	suite.addTest(new TestSuite(AbstractExecutorServiceTest.class));
165	<	suite.addTest(new TestSuite(AbstractQueueTest.class));
166	<	suite.addTest(new TestSuite(AbstractQueuedSynchronizerTest.class));
167	<	suite.addTest(new TestSuite(ArrayBlockingQueueTest.class));
115	<	suite.addTest(new TestSuite(ArrayDequeTest.class));
116	<	suite.addTest(new TestSuite(AtomicBooleanTest.class));
117	<	suite.addTest(new TestSuite(AtomicIntegerArrayTest.class));
118	<	suite.addTest(new TestSuite(AtomicIntegerFieldUpdaterTest.class));
119	<	suite.addTest(new TestSuite(AtomicIntegerTest.class));
120	<	suite.addTest(new TestSuite(AtomicLongArrayTest.class));
121	<	suite.addTest(new TestSuite(AtomicLongFieldUpdaterTest.class));
122	<	suite.addTest(new TestSuite(AtomicLongTest.class));
123	<	suite.addTest(new TestSuite(AtomicMarkableReferenceTest.class));
124	<	suite.addTest(new TestSuite(AtomicReferenceArrayTest.class));
125	<	suite.addTest(new TestSuite(AtomicReferenceFieldUpdaterTest.class));
126	<	suite.addTest(new TestSuite(AtomicReferenceTest.class));
127	<	suite.addTest(new TestSuite(AtomicStampedReferenceTest.class));
128	<	suite.addTest(new TestSuite(ConcurrentHashMapTest.class));
129	<	suite.addTest(new TestSuite(ConcurrentLinkedQueueTest.class));
130	<	suite.addTest(new TestSuite(ConcurrentSkipListMapTest.class));
131	<	suite.addTest(new TestSuite(ConcurrentSkipListSubMapTest.class));
132	<	suite.addTest(new TestSuite(ConcurrentSkipListSetTest.class));
133	<	suite.addTest(new TestSuite(ConcurrentSkipListSubSetTest.class));
134	<	suite.addTest(new TestSuite(CopyOnWriteArrayListTest.class));
135	<	suite.addTest(new TestSuite(CopyOnWriteArraySetTest.class));
136	<	suite.addTest(new TestSuite(CountDownLatchTest.class));
137	<	suite.addTest(new TestSuite(CyclicBarrierTest.class));
138	<	suite.addTest(new TestSuite(DelayQueueTest.class));
139	<	suite.addTest(new TestSuite(ExchangerTest.class));
140	<	suite.addTest(new TestSuite(ExecutorsTest.class));
141	<	suite.addTest(new TestSuite(ExecutorCompletionServiceTest.class));
142	<	suite.addTest(new TestSuite(FutureTaskTest.class));
143	<	suite.addTest(new TestSuite(LinkedBlockingDequeTest.class));
144	<	suite.addTest(new TestSuite(LinkedBlockingQueueTest.class));
145	<	suite.addTest(new TestSuite(LinkedListTest.class));
146	<	suite.addTest(new TestSuite(LockSupportTest.class));
147	<	suite.addTest(new TestSuite(PriorityBlockingQueueTest.class));
148	<	suite.addTest(new TestSuite(PriorityQueueTest.class));
149	<	suite.addTest(new TestSuite(ReentrantLockTest.class));
150	<	suite.addTest(new TestSuite(ReentrantReadWriteLockTest.class));
151	<	suite.addTest(new TestSuite(ScheduledExecutorTest.class));
152	<	suite.addTest(new TestSuite(SemaphoreTest.class));
153	<	suite.addTest(new TestSuite(SynchronousQueueTest.class));
154	<	suite.addTest(new TestSuite(SystemTest.class));
155	<	suite.addTest(new TestSuite(ThreadLocalTest.class));
156	<	suite.addTest(new TestSuite(ThreadPoolExecutorTest.class));
157	<	suite.addTest(new TestSuite(ThreadTest.class));
158	<	suite.addTest(new TestSuite(TreeMapTest.class));
159	<	suite.addTest(new TestSuite(TreeSetTest.class));
160	<
158	>	public static TestSuite newTestSuite(Object... suiteOrClasses) {
159	>	TestSuite suite = new TestSuite();
160	>	for (Object suiteOrClass : suiteOrClasses) {
161	>	if (suiteOrClass instanceof TestSuite)
162	>	suite.addTest((TestSuite) suiteOrClass);
163	>	else if (suiteOrClass instanceof Class)
164	>	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
165	>	else
166	>	throw new ClassCastException("not a test suite or class");
167	>	}
168		return suite;
169		}
170
171	+	/**
172	+	* Collects all JSR166 unit tests as one suite.
173	+	*/
174	+	public static Test suite() {
175	+	return newTestSuite(
176	+	ForkJoinPoolTest.suite(),
177	+	ForkJoinTaskTest.suite(),
178	+	RecursiveActionTest.suite(),
179	+	RecursiveTaskTest.suite(),
180	+	LinkedTransferQueueTest.suite(),
181	+	PhaserTest.suite(),
182	+	ThreadLocalRandomTest.suite(),
183	+	AbstractExecutorServiceTest.suite(),
184	+	AbstractQueueTest.suite(),
185	+	AbstractQueuedSynchronizerTest.suite(),
186	+	AbstractQueuedLongSynchronizerTest.suite(),
187	+	ArrayBlockingQueueTest.suite(),
188	+	ArrayDequeTest.suite(),
189	+	AtomicBooleanTest.suite(),
190	+	AtomicIntegerArrayTest.suite(),
191	+	AtomicIntegerFieldUpdaterTest.suite(),
192	+	AtomicIntegerTest.suite(),
193	+	AtomicLongArrayTest.suite(),
194	+	AtomicLongFieldUpdaterTest.suite(),
195	+	AtomicLongTest.suite(),
196	+	AtomicMarkableReferenceTest.suite(),
197	+	AtomicReferenceArrayTest.suite(),
198	+	AtomicReferenceFieldUpdaterTest.suite(),
199	+	AtomicReferenceTest.suite(),
200	+	AtomicStampedReferenceTest.suite(),
201	+	ConcurrentHashMapTest.suite(),
202	+	ConcurrentLinkedDequeTest.suite(),
203	+	ConcurrentLinkedQueueTest.suite(),
204	+	ConcurrentSkipListMapTest.suite(),
205	+	ConcurrentSkipListSubMapTest.suite(),
206	+	ConcurrentSkipListSetTest.suite(),
207	+	ConcurrentSkipListSubSetTest.suite(),
208	+	CopyOnWriteArrayListTest.suite(),
209	+	CopyOnWriteArraySetTest.suite(),
210	+	CountDownLatchTest.suite(),
211	+	CyclicBarrierTest.suite(),
212	+	DelayQueueTest.suite(),
213	+	EntryTest.suite(),
214	+	ExchangerTest.suite(),
215	+	ExecutorsTest.suite(),
216	+	ExecutorCompletionServiceTest.suite(),
217	+	FutureTaskTest.suite(),
218	+	LinkedBlockingDequeTest.suite(),
219	+	LinkedBlockingQueueTest.suite(),
220	+	LinkedListTest.suite(),
221	+	LockSupportTest.suite(),
222	+	PriorityBlockingQueueTest.suite(),
223	+	PriorityQueueTest.suite(),
224	+	ReentrantLockTest.suite(),
225	+	ReentrantReadWriteLockTest.suite(),
226	+	ScheduledExecutorTest.suite(),
227	+	ScheduledExecutorSubclassTest.suite(),
228	+	SemaphoreTest.suite(),
229	+	SynchronousQueueTest.suite(),
230	+	SystemTest.suite(),
231	+	ThreadLocalTest.suite(),
232	+	ThreadPoolExecutorTest.suite(),
233	+	ThreadPoolExecutorSubclassTest.suite(),
234	+	ThreadTest.suite(),
235	+	TimeUnitTest.suite(),
236	+	TreeMapTest.suite(),
237	+	TreeSetTest.suite(),
238	+	TreeSubMapTest.suite(),
239	+	TreeSubSetTest.suite());
240	+	}
241	+
242
243		public static long SHORT_DELAY_MS;
244		public static long SMALL_DELAY_MS;
#	Line 169 | Line 247 | public class JSR166TestCase extends Test
247
248
249		/**
250	<	* Return the shortest timed delay. This could
250	>	* Returns the shortest timed delay. This could
251		* be reimplemented to use for example a Property.
252	<	*/
252	>	*/
253		protected long getShortDelay() {
254		return 50;
255		}
256
257
258		/**
259	<	* Set delays as multiples of SHORT_DELAY.
259	>	* Sets delays as multiples of SHORT_DELAY.
260		*/
261	<	protected  void setDelays() {
261	>	protected void setDelays() {
262		SHORT_DELAY_MS = getShortDelay();
263	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
263	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
264		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
265	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
265	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
266		}
267
268		/**
269	<	* Flag set true if any threadAssert methods fail
269	>	* The first exception encountered if any threadAssertXXX method fails.
270		*/
271	<	volatile boolean threadFailed;
271	>	private final AtomicReference<Throwable> threadFailure
272	>	= new AtomicReference<Throwable>(null);
273
274		/**
275	<	* Initialize test to indicate that no thread assertions have failed
275	>	* Records an exception so that it can be rethrown later in the test
276	>	* harness thread, triggering a test case failure.  Only the first
277	>	* failure is recorded; subsequent calls to this method from within
278	>	* the same test have no effect.
279		*/
280	<	public void setUp() {
280	>	public void threadRecordFailure(Throwable t) {
281	>	threadFailure.compareAndSet(null, t);
282	>	}
283	>
284	>	public void setUp() {
285		setDelays();
200	–	threadFailed = false;
286		}
287
288		/**
289	<	* Trigger test case failure if any thread assertions have failed
289	>	* Triggers test case failure if any thread assertions have failed,
290	>	* by rethrowing, in the test harness thread, any exception recorded
291	>	* earlier by threadRecordFailure.
292		*/
293	<	public void tearDown() {
294	<	assertFalse(threadFailed);
293	>	public void tearDown() throws Exception {
294	>	Throwable t = threadFailure.getAndSet(null);
295	>	if (t != null) {
296	>	if (t instanceof Error)
297	>	throw (Error) t;
298	>	else if (t instanceof RuntimeException)
299	>	throw (RuntimeException) t;
300	>	else if (t instanceof Exception)
301	>	throw (Exception) t;
302	>	else {
303	>	AssertionFailedError afe =
304	>	new AssertionFailedError(t.toString());
305	>	afe.initCause(t);
306	>	throw afe;
307	>	}
308	>	}
309		}
310
311		/**
312	<	* Fail, also setting status to indicate current testcase should fail
313	<	*/
312	>	* Just like fail(reason), but additionally recording (using
313	>	* threadRecordFailure) any AssertionFailedError thrown, so that
314	>	* the current testcase will fail.
315	>	*/
316		public void threadFail(String reason) {
317	<	threadFailed = true;
318	<	fail(reason);
317	>	try {
318	>	fail(reason);
319	>	} catch (AssertionFailedError t) {
320	>	threadRecordFailure(t);
321	>	fail(reason);
322	>	}
323		}
324
325		/**
326	<	* If expression not true, set status to indicate current testcase
327	<	* should fail
328	<	*/
326	>	* Just like assertTrue(b), but additionally recording (using
327	>	* threadRecordFailure) any AssertionFailedError thrown, so that
328	>	* the current testcase will fail.
329	>	*/
330		public void threadAssertTrue(boolean b) {
331	<	if (!b) {
224	<	threadFailed = true;
331	>	try {
332		assertTrue(b);
333	+	} catch (AssertionFailedError t) {
334	+	threadRecordFailure(t);
335	+	throw t;
336		}
337		}
338
339		/**
340	<	* If expression not false, set status to indicate current testcase
341	<	* should fail
342	<	*/
340	>	* Just like assertFalse(b), but additionally recording (using
341	>	* threadRecordFailure) any AssertionFailedError thrown, so that
342	>	* the current testcase will fail.
343	>	*/
344		public void threadAssertFalse(boolean b) {
345	<	if (b) {
235	<	threadFailed = true;
345	>	try {
346		assertFalse(b);
347	+	} catch (AssertionFailedError t) {
348	+	threadRecordFailure(t);
349	+	throw t;
350		}
351		}
352
353		/**
354	<	* If argument not null, set status to indicate current testcase
355	<	* should fail
356	<	*/
354	>	* Just like assertNull(x), but additionally recording (using
355	>	* threadRecordFailure) any AssertionFailedError thrown, so that
356	>	* the current testcase will fail.
357	>	*/
358		public void threadAssertNull(Object x) {
359	<	if (x != null) {
246	<	threadFailed = true;
359	>	try {
360		assertNull(x);
361	+	} catch (AssertionFailedError t) {
362	+	threadRecordFailure(t);
363	+	throw t;
364		}
365		}
366
367		/**
368	<	* If arguments not equal, set status to indicate current testcase
369	<	* should fail
370	<	*/
368	>	* Just like assertEquals(x, y), but additionally recording (using
369	>	* threadRecordFailure) any AssertionFailedError thrown, so that
370	>	* the current testcase will fail.
371	>	*/
372		public void threadAssertEquals(long x, long y) {
373	<	if (x != y) {
257	<	threadFailed = true;
373	>	try {
374		assertEquals(x, y);
375	+	} catch (AssertionFailedError t) {
376	+	threadRecordFailure(t);
377	+	throw t;
378		}
379		}
380
381		/**
382	<	* If arguments not equal, set status to indicate current testcase
383	<	* should fail
384	<	*/
382	>	* Just like assertEquals(x, y), but additionally recording (using
383	>	* threadRecordFailure) any AssertionFailedError thrown, so that
384	>	* the current testcase will fail.
385	>	*/
386		public void threadAssertEquals(Object x, Object y) {
387	<	if (x != y && (x == null || !x.equals(y))) {
268	<	threadFailed = true;
387	>	try {
388		assertEquals(x, y);
389	+	} catch (AssertionFailedError t) {
390	+	threadRecordFailure(t);
391	+	throw t;
392	+	} catch (Throwable t) {
393	+	threadUnexpectedException(t);
394		}
395		}
396
397		/**
398	<	* threadFail with message "should throw exception"
399	<	*/
398	>	* Just like assertSame(x, y), but additionally recording (using
399	>	* threadRecordFailure) any AssertionFailedError thrown, so that
400	>	* the current testcase will fail.
401	>	*/
402	>	public void threadAssertSame(Object x, Object y) {
403	>	try {
404	>	assertSame(x, y);
405	>	} catch (AssertionFailedError t) {
406	>	threadRecordFailure(t);
407	>	throw t;
408	>	}
409	>	}
410	>
411	>	/**
412	>	* Calls threadFail with message "should throw exception".
413	>	*/
414		public void threadShouldThrow() {
415	<	threadFailed = true;
416	<	fail("should throw exception");
415	>	threadFail("should throw exception");
416	>	}
417	>
418	>	/**
419	>	* Calls threadFail with message "should throw" + exceptionName.
420	>	*/
421	>	public void threadShouldThrow(String exceptionName) {
422	>	threadFail("should throw " + exceptionName);
423		}
424
425		/**
426	<	* threadFail with message "Unexpected exception"
426	>	* Records the given exception using {@link #threadRecordFailure},
427	>	* then rethrows the exception, wrapping it in an
428	>	* AssertionFailedError if necessary.
429		*/
430	<	public void threadUnexpectedException() {
431	<	threadFailed = true;
432	<	fail("Unexpected exception");
430	>	public void threadUnexpectedException(Throwable t) {
431	>	threadRecordFailure(t);
432	>	t.printStackTrace();
433	>	if (t instanceof RuntimeException)
434	>	throw (RuntimeException) t;
435	>	else if (t instanceof Error)
436	>	throw (Error) t;
437	>	else {
438	>	AssertionFailedError afe =
439	>	new AssertionFailedError("unexpected exception: " + t);
440	>	t.initCause(t);
441	>	throw afe;
442	>	}
443		}
444
445	+	/**
446	+	* Delays, via Thread.sleep for the given millisecond delay, but
447	+	* if the sleep is shorter than specified, may re-sleep or yield
448	+	* until time elapses.
449	+	*/
450	+	public static void delay(long ms) throws InterruptedException {
451	+	long startTime = System.nanoTime();
452	+	long ns = ms * 1000 * 1000;
453	+	for (;;) {
454	+	if (ms > 0L)
455	+	Thread.sleep(ms);
456	+	else // too short to sleep
457	+	Thread.yield();
458	+	long d = ns - (System.nanoTime() - startTime);
459	+	if (d > 0L)
460	+	ms = d / (1000 * 1000);
461	+	else
462	+	break;
463	+	}
464	+	}
465
466		/**
467	<	* Wait out termination of a thread pool or fail doing so
467	>	* Waits out termination of a thread pool or fails doing so.
468		*/
469		public void joinPool(ExecutorService exec) {
470		try {
471		exec.shutdown();
472	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
473	<	} catch(SecurityException ok) {
472	>	assertTrue("ExecutorService did not terminate in a timely manner",
473	>	exec.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS));
474	>	} catch (SecurityException ok) {
475		// Allowed in case test doesn't have privs
476	<	} catch(InterruptedException ie) {
477	<	fail("Unexpected exception");
476	>	} catch (InterruptedException ie) {
477	>	fail("Unexpected InterruptedException");
478		}
479		}
480
481
482		/**
483	<	* fail with message "should throw exception"
484	<	*/
483	>	* Fails with message "should throw exception".
484	>	*/
485		public void shouldThrow() {
486		fail("Should throw exception");
487		}
488
489		/**
490	<	* fail with message "Unexpected exception"
490	>	* Fails with message "should throw " + exceptionName.
491		*/
492	<	public void unexpectedException() {
493	<	fail("Unexpected exception");
492	>	public void shouldThrow(String exceptionName) {
493	>	fail("Should throw " + exceptionName);
494		}
495
319	–
496		/**
497		* The number of elements to place in collections, arrays, etc.
498		*/
499	<	static final int SIZE = 20;
499	>	public static final int SIZE = 20;
500
501		// Some convenient Integer constants
502
503	<	static final Integer zero = new Integer(0);
504	<	static final Integer one = new Integer(1);
505	<	static final Integer two = new Integer(2);
506	<	static final Integer three  = new Integer(3);
507	<	static final Integer four  = new Integer(4);
508	<	static final Integer five  = new Integer(5);
509	<	static final Integer six = new Integer(6);
510	<	static final Integer seven = new Integer(7);
511	<	static final Integer eight = new Integer(8);
512	<	static final Integer nine = new Integer(9);
513	<	static final Integer m1  = new Integer(-1);
514	<	static final Integer m2  = new Integer(-2);
515	<	static final Integer m3  = new Integer(-3);
516	<	static final Integer m4 = new Integer(-4);
517	<	static final Integer m5 = new Integer(-5);
518	<	static final Integer m10 = new Integer(-10);
503	>	public static final Integer zero  = new Integer(0);
504	>	public static final Integer one   = new Integer(1);
505	>	public static final Integer two   = new Integer(2);
506	>	public static final Integer three = new Integer(3);
507	>	public static final Integer four  = new Integer(4);
508	>	public static final Integer five  = new Integer(5);
509	>	public static final Integer six   = new Integer(6);
510	>	public static final Integer seven = new Integer(7);
511	>	public static final Integer eight = new Integer(8);
512	>	public static final Integer nine  = new Integer(9);
513	>	public static final Integer m1  = new Integer(-1);
514	>	public static final Integer m2  = new Integer(-2);
515	>	public static final Integer m3  = new Integer(-3);
516	>	public static final Integer m4  = new Integer(-4);
517	>	public static final Integer m5  = new Integer(-5);
518	>	public static final Integer m6  = new Integer(-6);
519	>	public static final Integer m10 = new Integer(-10);
520
521
522		/**
523	+	* Runs Runnable r with a security policy that permits precisely
524	+	* the specified permissions.  If there is no current security
525	+	* manager, the runnable is run twice, both with and without a
526	+	* security manager.  We require that any security manager permit
527	+	* getPolicy/setPolicy.
528	+	*/
529	+	public void runWithPermissions(Runnable r, Permission... permissions) {
530	+	SecurityManager sm = System.getSecurityManager();
531	+	if (sm == null) {
532	+	r.run();
533	+	Policy savedPolicy = Policy.getPolicy();
534	+	try {
535	+	Policy.setPolicy(permissivePolicy());
536	+	System.setSecurityManager(new SecurityManager());
537	+	runWithPermissions(r, permissions);
538	+	} finally {
539	+	System.setSecurityManager(null);
540	+	Policy.setPolicy(savedPolicy);
541	+	}
542	+	} else {
543	+	Policy savedPolicy = Policy.getPolicy();
544	+	AdjustablePolicy policy = new AdjustablePolicy(permissions);
545	+	Policy.setPolicy(policy);
546	+
547	+	try {
548	+	r.run();
549	+	} finally {
550	+	policy.addPermission(new SecurityPermission("setPolicy"));
551	+	Policy.setPolicy(savedPolicy);
552	+	}
553	+	}
554	+	}
555	+
556	+	/**
557	+	* Runs a runnable without any permissions.
558	+	*/
559	+	public void runWithoutPermissions(Runnable r) {
560	+	runWithPermissions(r);
561	+	}
562	+
563	+	/**
564		* A security policy where new permissions can be dynamically added
565		* or all cleared.
566		*/
567	<	static class AdjustablePolicy extends java.security.Policy {
567	>	public static class AdjustablePolicy extends java.security.Policy {
568		Permissions perms = new Permissions();
569	<	AdjustablePolicy() { }
569	>	AdjustablePolicy(Permission... permissions) {
570	>	for (Permission permission : permissions)
571	>	perms.add(permission);
572	>	}
573		void addPermission(Permission perm) { perms.add(perm); }
574		void clearPermissions() { perms = new Permissions(); }
575	<	public PermissionCollection getPermissions(CodeSource cs) {
576	<	return perms;
577	<	}
578	<	public PermissionCollection getPermissions(ProtectionDomain pd) {
579	<	return perms;
580	<	}
581	<	public boolean implies(ProtectionDomain pd, Permission p) {
582	<	return perms.implies(p);
583	<	}
584	<	public void refresh() {}
575	>	public PermissionCollection getPermissions(CodeSource cs) {
576	>	return perms;
577	>	}
578	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
579	>	return perms;
580	>	}
581	>	public boolean implies(ProtectionDomain pd, Permission p) {
582	>	return perms.implies(p);
583	>	}
584	>	public void refresh() {}
585		}
586
587	+	/**
588	+	* Returns a policy containing all the permissions we ever need.
589	+	*/
590	+	public static Policy permissivePolicy() {
591	+	return new AdjustablePolicy
592	+	// Permissions j.u.c. needs directly
593	+	(new RuntimePermission("modifyThread"),
594	+	new RuntimePermission("getClassLoader"),
595	+	new RuntimePermission("setContextClassLoader"),
596	+	// Permissions needed to change permissions!
597	+	new SecurityPermission("getPolicy"),
598	+	new SecurityPermission("setPolicy"),
599	+	new RuntimePermission("setSecurityManager"),
600	+	// Permissions needed by the junit test harness
601	+	new RuntimePermission("accessDeclaredMembers"),
602	+	new PropertyPermission("*", "read"),
603	+	new java.io.FilePermission("<<ALL FILES>>", "read"));
604	+	}
605
606	<	// Some convenient Runnable classes
607	<
608	<	static class NoOpRunnable implements Runnable {
609	<	public void run() {}
606	>	/**
607	>	* Sleeps until the given time has elapsed.
608	>	* Throws AssertionFailedError if interrupted.
609	>	*/
610	>	void sleep(long millis) {
611	>	try {
612	>	delay(millis);
613	>	} catch (InterruptedException ie) {
614	>	AssertionFailedError afe =
615	>	new AssertionFailedError("Unexpected InterruptedException");
616	>	afe.initCause(ie);
617	>	throw afe;
618	>	}
619		}
620
621	<	static class NoOpCallable implements Callable {
622	<	public Object call() { return Boolean.TRUE; }
621	>	/**
622	>	* Sleeps until the timeout has elapsed, or interrupted.
623	>	* Does <em>NOT</em> throw InterruptedException.
624	>	*/
625	>	void sleepTillInterrupted(long timeoutMillis) {
626	>	try {
627	>	Thread.sleep(timeoutMillis);
628	>	} catch (InterruptedException wakeup) {}
629		}
630
631	<	static final String TEST_STRING = "a test string";
631	>	/**
632	>	* Waits up to the specified number of milliseconds for the given
633	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
634	>	*/
635	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
636	>	long timeoutNanos = timeoutMillis * 1000L * 1000L;
637	>	long t0 = System.nanoTime();
638	>	for (;;) {
639	>	Thread.State s = thread.getState();
640	>	if (s == Thread.State.BLOCKED ||
641	>	s == Thread.State.WAITING ||
642	>	s == Thread.State.TIMED_WAITING)
643	>	return;
644	>	else if (s == Thread.State.TERMINATED)
645	>	fail("Unexpected thread termination");
646	>	else if (System.nanoTime() - t0 > timeoutNanos) {
647	>	threadAssertTrue(thread.isAlive());
648	>	return;
649	>	}
650	>	Thread.yield();
651	>	}
652	>	}
653
654	<	static class StringTask implements Callable<String> {
655	<	public String call() { return TEST_STRING; }
654	>	/**
655	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
656	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
657	>	*/
658	>	void waitForThreadToEnterWaitState(Thread thread) {
659	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
660		}
661
662	<	static class NPETask implements Callable<String> {
663	<	public String call() { throw new NullPointerException(); }
662	>	/**
663	>	* Returns the number of milliseconds since time given by
664	>	* startNanoTime, which must have been previously returned from a
665	>	* call to {@link System.nanoTime()}.
666	>	*/
667	>	long millisElapsedSince(long startNanoTime) {
668	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
669		}
670
671	<	static class CallableOne implements Callable<Integer> {
672	<	public Integer call() { return one; }
671	>	/**
672	>	* Returns a new started daemon Thread running the given runnable.
673	>	*/
674	>	Thread newStartedThread(Runnable runnable) {
675	>	Thread t = new Thread(runnable);
676	>	t.setDaemon(true);
677	>	t.start();
678	>	return t;
679		}
680
681	<	class ShortRunnable implements Runnable {
682	<	public void run() {
683	<	try {
684	<	Thread.sleep(SHORT_DELAY_MS);
685	<	}
686	<	catch(Exception e) {
687	<	threadUnexpectedException();
681	>	/**
682	>	* Waits for the specified time (in milliseconds) for the thread
683	>	* to terminate (using {@link Thread#join(long)}), else interrupts
684	>	* the thread (in the hope that it may terminate later) and fails.
685	>	*/
686	>	void awaitTermination(Thread t, long timeoutMillis) {
687	>	try {
688	>	t.join(timeoutMillis);
689	>	} catch (InterruptedException ie) {
690	>	threadUnexpectedException(ie);
691	>	} finally {
692	>	if (t.isAlive()) {
693	>	t.interrupt();
694	>	fail("Test timed out");
695		}
696		}
697		}
698
699	<	class ShortInterruptedRunnable implements Runnable {
700	<	public void run() {
699	>	/**
700	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
701	>	* 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) {
705	>	awaitTermination(t, LONG_DELAY_MS);
706	>	}
707	>
708	>	// Some convenient Runnable classes
709	>
710	>	public abstract class CheckedRunnable implements Runnable {
711	>	protected abstract void realRun() throws Throwable;
712	>
713	>	public final void run() {
714		try {
715	<	Thread.sleep(SHORT_DELAY_MS);
716	<	threadShouldThrow();
717	<	}
408	<	catch(InterruptedException success) {
715	>	realRun();
716	>	} catch (Throwable t) {
717	>	threadUnexpectedException(t);
718		}
719		}
720		}
721
722	<	class SmallRunnable implements Runnable {
723	<	public void run() {
722	>	public abstract class RunnableShouldThrow implements Runnable {
723	>	protected abstract void realRun() throws Throwable;
724	>
725	>	final Class<?> exceptionClass;
726	>
727	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
728	>	this.exceptionClass = exceptionClass;
729	>	}
730	>
731	>	public final void run() {
732		try {
733	<	Thread.sleep(SMALL_DELAY_MS);
734	<	}
735	<	catch(Exception e) {
736	<	threadUnexpectedException();
733	>	realRun();
734	>	threadShouldThrow(exceptionClass.getSimpleName());
735	>	} catch (Throwable t) {
736	>	if (! exceptionClass.isInstance(t))
737	>	threadUnexpectedException(t);
738		}
739		}
740		}
741
742	<	class SmallPossiblyInterruptedRunnable implements Runnable {
743	<	public void run() {
742	>	public abstract class ThreadShouldThrow extends Thread {
743	>	protected abstract void realRun() throws Throwable;
744	>
745	>	final Class<?> exceptionClass;
746	>
747	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
748	>	this.exceptionClass = exceptionClass;
749	>	}
750	>
751	>	public final void run() {
752		try {
753	<	Thread.sleep(SMALL_DELAY_MS);
754	<	}
755	<	catch(Exception e) {
753	>	realRun();
754	>	threadShouldThrow(exceptionClass.getSimpleName());
755	>	} catch (Throwable t) {
756	>	if (! exceptionClass.isInstance(t))
757	>	threadUnexpectedException(t);
758		}
759		}
760		}
761
762	<	class SmallCallable implements Callable {
763	<	public Object call() {
762	>	public abstract class CheckedInterruptedRunnable implements Runnable {
763	>	protected abstract void realRun() throws Throwable;
764	>
765	>	public final void run() {
766		try {
767	<	Thread.sleep(SMALL_DELAY_MS);
768	<	}
769	<	catch(Exception e) {
770	<	threadUnexpectedException();
767	>	realRun();
768	>	threadShouldThrow("InterruptedException");
769	>	} catch (InterruptedException success) {
770	>	} catch (Throwable t) {
771	>	threadUnexpectedException(t);
772		}
442	–	return Boolean.TRUE;
773		}
774		}
775
776	<	class SmallInterruptedRunnable implements Runnable {
777	<	public void run() {
776	>	public abstract class CheckedCallable<T> implements Callable<T> {
777	>	protected abstract T realCall() throws Throwable;
778	>
779	>	public final T call() {
780		try {
781	<	Thread.sleep(SMALL_DELAY_MS);
782	<	threadShouldThrow();
783	<	}
784	<	catch(InterruptedException success) {
781	>	return realCall();
782	>	} catch (Throwable t) {
783	>	threadUnexpectedException(t);
784	>	return null;
785		}
786		}
787		}
788
789	+	public abstract class CheckedInterruptedCallable<T>
790	+	implements Callable<T> {
791	+	protected abstract T realCall() throws Throwable;
792
793	<	class MediumRunnable implements Runnable {
459	<	public void run() {
793	>	public final T call() {
794		try {
795	<	Thread.sleep(MEDIUM_DELAY_MS);
796	<	}
797	<	catch(Exception e) {
798	<	threadUnexpectedException();
795	>	T result = realCall();
796	>	threadShouldThrow("InterruptedException");
797	>	return result;
798	>	} catch (InterruptedException success) {
799	>	} catch (Throwable t) {
800	>	threadUnexpectedException(t);
801		}
802	+	return null;
803		}
804		}
805
806	<	class MediumInterruptedRunnable implements Runnable {
807	<	public void run() {
806	>	public static class NoOpRunnable implements Runnable {
807	>	public void run() {}
808	>	}
809	>
810	>	public static class NoOpCallable implements Callable {
811	>	public Object call() { return Boolean.TRUE; }
812	>	}
813	>
814	>	public static final String TEST_STRING = "a test string";
815	>
816	>	public static class StringTask implements Callable<String> {
817	>	public String call() { return TEST_STRING; }
818	>	}
819	>
820	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
821	>	return new CheckedCallable<String>() {
822	>	protected String realCall() {
823	>	try {
824	>	latch.await();
825	>	} catch (InterruptedException quittingTime) {}
826	>	return TEST_STRING;
827	>	}};
828	>	}
829	>
830	>	public Runnable awaiter(final CountDownLatch latch) {
831	>	return new CheckedRunnable() {
832	>	public void realRun() throws InterruptedException {
833	>	latch.await();
834	>	}};
835	>	}
836	>
837	>	public static class NPETask implements Callable<String> {
838	>	public String call() { throw new NullPointerException(); }
839	>	}
840	>
841	>	public static class CallableOne implements Callable<Integer> {
842	>	public Integer call() { return one; }
843	>	}
844	>
845	>	public class ShortRunnable extends CheckedRunnable {
846	>	protected void realRun() throws Throwable {
847	>	delay(SHORT_DELAY_MS);
848	>	}
849	>	}
850	>
851	>	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
852	>	protected void realRun() throws InterruptedException {
853	>	delay(SHORT_DELAY_MS);
854	>	}
855	>	}
856	>
857	>	public class SmallRunnable extends CheckedRunnable {
858	>	protected void realRun() throws Throwable {
859	>	delay(SMALL_DELAY_MS);
860	>	}
861	>	}
862	>
863	>	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
864	>	protected void realRun() {
865		try {
866	<	Thread.sleep(MEDIUM_DELAY_MS);
867	<	threadShouldThrow();
474	<	}
475	<	catch(InterruptedException success) {
476	<	}
866	>	delay(SMALL_DELAY_MS);
867	>	} catch (InterruptedException ok) {}
868		}
869		}
870
871	<	class MediumPossiblyInterruptedRunnable implements Runnable {
872	<	public void run() {
871	>	public class SmallCallable extends CheckedCallable {
872	>	protected Object realCall() throws InterruptedException {
873	>	delay(SMALL_DELAY_MS);
874	>	return Boolean.TRUE;
875	>	}
876	>	}
877	>
878	>	public class MediumRunnable extends CheckedRunnable {
879	>	protected void realRun() throws Throwable {
880	>	delay(MEDIUM_DELAY_MS);
881	>	}
882	>	}
883	>
884	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
885	>	protected void realRun() throws InterruptedException {
886	>	delay(MEDIUM_DELAY_MS);
887	>	}
888	>	}
889	>
890	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
891	>	return new CheckedRunnable() {
892	>	protected void realRun() {
893	>	try {
894	>	delay(timeoutMillis);
895	>	} catch (InterruptedException ok) {}
896	>	}};
897	>	}
898	>
899	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
900	>	protected void realRun() {
901		try {
902	<	Thread.sleep(MEDIUM_DELAY_MS);
903	<	}
485	<	catch(InterruptedException success) {
486	<	}
902	>	delay(MEDIUM_DELAY_MS);
903	>	} catch (InterruptedException ok) {}
904		}
905		}
906
907	<	class LongPossiblyInterruptedRunnable implements Runnable {
908	<	public void run() {
907	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
908	>	protected void realRun() {
909		try {
910	<	Thread.sleep(LONG_DELAY_MS);
911	<	}
495	<	catch(InterruptedException success) {
496	<	}
910	>	delay(LONG_DELAY_MS);
911	>	} catch (InterruptedException ok) {}
912		}
913		}
914
915		/**
916		* For use as ThreadFactory in constructors
917		*/
918	<	static class SimpleThreadFactory implements ThreadFactory{
919	<	public Thread newThread(Runnable r){
918	>	public static class SimpleThreadFactory implements ThreadFactory {
919	>	public Thread newThread(Runnable r) {
920		return new Thread(r);
921	<	}
921	>	}
922	>	}
923	>
924	>	public interface TrackedRunnable extends Runnable {
925	>	boolean isDone();
926		}
927
928	<	static class TrackedShortRunnable implements Runnable {
929	<	volatile boolean done = false;
928	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
929	>	return new TrackedRunnable() {
930	>	private volatile boolean done = false;
931	>	public boolean isDone() { return done; }
932	>	public void run() {
933	>	try {
934	>	delay(timeoutMillis);
935	>	done = true;
936	>	} catch (InterruptedException ok) {}
937	>	}
938	>	};
939	>	}
940	>
941	>	public static class TrackedShortRunnable implements Runnable {
942	>	public volatile boolean done = false;
943		public void run() {
944		try {
945	<	Thread.sleep(SMALL_DELAY_MS);
945	>	delay(SHORT_DELAY_MS);
946		done = true;
947	<	} catch(Exception e){
516	<	}
947	>	} catch (InterruptedException ok) {}
948		}
949		}
950
951	<	static class TrackedMediumRunnable implements Runnable {
952	<	volatile boolean done = false;
951	>	public static class TrackedSmallRunnable implements Runnable {
952	>	public volatile boolean done = false;
953		public void run() {
954		try {
955	<	Thread.sleep(MEDIUM_DELAY_MS);
955	>	delay(SMALL_DELAY_MS);
956		done = true;
957	<	} catch(Exception e){
527	<	}
957	>	} catch (InterruptedException ok) {}
958		}
959		}
960
961	<	static class TrackedLongRunnable implements Runnable {
962	<	volatile boolean done = false;
961	>	public static class TrackedMediumRunnable implements Runnable {
962	>	public volatile boolean done = false;
963		public void run() {
964		try {
965	<	Thread.sleep(LONG_DELAY_MS);
965	>	delay(MEDIUM_DELAY_MS);
966		done = true;
967	<	} catch(Exception e){
968	<	}
967	>	} catch (InterruptedException ok) {}
968	>	}
969	>	}
970	>
971	>	public static class TrackedLongRunnable implements Runnable {
972	>	public volatile boolean done = false;
973	>	public void run() {
974	>	try {
975	>	delay(LONG_DELAY_MS);
976	>	done = true;
977	>	} catch (InterruptedException ok) {}
978		}
979		}
980
981	<	static class TrackedNoOpRunnable implements Runnable {
982	<	volatile boolean done = false;
981	>	public static class TrackedNoOpRunnable implements Runnable {
982	>	public volatile boolean done = false;
983		public void run() {
984		done = true;
985		}
986		}
987
988	<	static class TrackedCallable implements Callable {
989	<	volatile boolean done = false;
988	>	public static class TrackedCallable implements Callable {
989	>	public volatile boolean done = false;
990		public Object call() {
991		try {
992	<	Thread.sleep(SMALL_DELAY_MS);
992	>	delay(SMALL_DELAY_MS);
993		done = true;
994	<	} catch(Exception e){
556	<	}
994	>	} catch (InterruptedException ok) {}
995		return Boolean.TRUE;
996		}
997		}
998
999	+	/**
1000	+	* Analog of CheckedRunnable for RecursiveAction
1001	+	*/
1002	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1003	+	protected abstract void realCompute() throws Throwable;
1004	+
1005	+	public final void compute() {
1006	+	try {
1007	+	realCompute();
1008	+	} catch (Throwable t) {
1009	+	threadUnexpectedException(t);
1010	+	}
1011	+	}
1012	+	}
1013	+
1014	+	/**
1015	+	* Analog of CheckedCallable for RecursiveTask
1016	+	*/
1017	+	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1018	+	protected abstract T realCompute() throws Throwable;
1019	+
1020	+	public final T compute() {
1021	+	try {
1022	+	return realCompute();
1023	+	} catch (Throwable t) {
1024	+	threadUnexpectedException(t);
1025	+	return null;
1026	+	}
1027	+	}
1028	+	}
1029
1030		/**
1031		* For use as RejectedExecutionHandler in constructors
1032		*/
1033	<	static class NoOpREHandler implements RejectedExecutionHandler{
1034	<	public void rejectedExecution(Runnable r, ThreadPoolExecutor executor){}
1033	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1034	>	public void rejectedExecution(Runnable r,
1035	>	ThreadPoolExecutor executor) {}
1036		}
1037	<
1038	<
1037	>
1038	>	/**
1039	>	* A CyclicBarrier that fails with AssertionFailedErrors instead
1040	>	* of throwing checked exceptions.
1041	>	*/
1042	>	public class CheckedBarrier extends CyclicBarrier {
1043	>	public CheckedBarrier(int parties) { super(parties); }
1044	>
1045	>	public int await() {
1046	>	try {
1047	>	return super.await();
1048	>	} catch (Exception e) {
1049	>	AssertionFailedError afe =
1050	>	new AssertionFailedError("Unexpected exception: " + e);
1051	>	afe.initCause(e);
1052	>	throw afe;
1053	>	}
1054	>	}
1055	>	}
1056	>
1057	>	public void checkEmpty(BlockingQueue q) {
1058	>	try {
1059	>	assertTrue(q.isEmpty());
1060	>	assertEquals(0, q.size());
1061	>	assertNull(q.peek());
1062	>	assertNull(q.poll());
1063	>	assertNull(q.poll(0, MILLISECONDS));
1064	>	assertEquals(q.toString(), "[]");
1065	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1066	>	assertFalse(q.iterator().hasNext());
1067	>	try {
1068	>	q.element();
1069	>	shouldThrow();
1070	>	} catch (NoSuchElementException success) {}
1071	>	try {
1072	>	q.iterator().next();
1073	>	shouldThrow();
1074	>	} catch (NoSuchElementException success) {}
1075	>	try {
1076	>	q.remove();
1077	>	shouldThrow();
1078	>	} catch (NoSuchElementException success) {}
1079	>	} catch (InterruptedException ie) {
1080	>	threadUnexpectedException(ie);
1081	>	}
1082	>	}
1083	>
1084		}

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