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Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.13 by jsr166, Thu Nov 19 01:15:42 2009 UTC vs.
Revision 1.31 by jsr166, Tue Mar 15 19:47:07 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		*/
#	Line 14 | Line 14 | import java.io.*;
14
15		public class SynchronousQueueTest extends JSR166TestCase {
16
17	+	public static class Fair extends BlockingQueueTest {
18	+	protected BlockingQueue emptyCollection() {
19	+	return new SynchronousQueue(true);
20	+	}
21	+	}
22	+
23	+	public static class NonFair extends BlockingQueueTest {
24	+	protected BlockingQueue emptyCollection() {
25	+	return new SynchronousQueue(false);
26	+	}
27	+	}
28	+
29		public static void main(String[] args) {
30	<	junit.textui.TestRunner.run (suite());
30	>	junit.textui.TestRunner.run(suite());
31		}
32
33		public static Test suite() {
34	<	return new TestSuite(SynchronousQueueTest.class);
34	>	return newTestSuite(SynchronousQueueTest.class,
35	>	new Fair().testSuite(),
36	>	new NonFair().testSuite());
37		}
38
39		/**
40	<	* A SynchronousQueue is both empty and full
40	>	* Any SynchronousQueue is both empty and full
41		*/
42	<	public void testEmptyFull() {
29	<	SynchronousQueue q = new SynchronousQueue();
42	>	public void testEmptyFull(SynchronousQueue q) {
43		assertTrue(q.isEmpty());
44	<	assertEquals(0, q.size());
44	>	assertEquals(0, q.size());
45		assertEquals(0, q.remainingCapacity());
46		assertFalse(q.offer(zero));
47		}
48
49		/**
50	+	* A non-fair SynchronousQueue is both empty and full
51	+	*/
52	+	public void testEmptyFull() {
53	+	testEmptyFull(new SynchronousQueue());
54	+	}
55	+
56	+	/**
57		* A fair SynchronousQueue is both empty and full
58		*/
59		public void testFairEmptyFull() {
60	<	SynchronousQueue q = new SynchronousQueue(true);
41	<	assertTrue(q.isEmpty());
42	<	assertEquals(0, q.size());
43	<	assertEquals(0, q.remainingCapacity());
44	<	assertFalse(q.offer(zero));
60	>	testEmptyFull(new SynchronousQueue(true));
61		}
62
63		/**
64		* offer(null) throws NPE
65		*/
66		public void testOfferNull() {
67	<	try {
67	>	try {
68		SynchronousQueue q = new SynchronousQueue();
69		q.offer(null);
70		shouldThrow();
#	Line 59 | Line 75 | public class SynchronousQueueTest extend
75		* add(null) throws NPE
76		*/
77		public void testAddNull() {
78	<	try {
78	>	try {
79		SynchronousQueue q = new SynchronousQueue();
80		q.add(null);
81		shouldThrow();
#	Line 78 | Line 94 | public class SynchronousQueueTest extend
94		* add throws ISE if no active taker
95		*/
96		public void testAdd() {
97	<	try {
97	>	try {
98		SynchronousQueue q = new SynchronousQueue();
99		assertEquals(0, q.remainingCapacity());
100		q.add(one);
#	Line 119 | Line 135 | public class SynchronousQueueTest extend
135		shouldThrow();
136		} catch (NullPointerException success) {}
137		}
138	+
139		/**
140		* addAll throws ISE if no active taker
141		*/
#	Line 137 | Line 154 | public class SynchronousQueueTest extend
154		* put(null) throws NPE
155		*/
156		public void testPutNull() throws InterruptedException {
157	<	try {
157	>	try {
158		SynchronousQueue q = new SynchronousQueue();
159		q.put(null);
160		shouldThrow();
#	Line 148 | Line 165 | public class SynchronousQueueTest extend
165		* put blocks interruptibly if no active taker
166		*/
167		public void testBlockingPut() throws InterruptedException {
168	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
169	<	public void realRun() throws InterruptedException {
168	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
169	>	public void realRun() throws InterruptedException {
170		SynchronousQueue q = new SynchronousQueue();
171		q.put(zero);
172		}});
#	Line 165 | Line 182 | public class SynchronousQueueTest extend
182		*/
183		public void testPutWithTake() throws InterruptedException {
184		final SynchronousQueue q = new SynchronousQueue();
185	<	Thread t = new Thread(new CheckedRunnable() {
186	<	public void realRun() throws InterruptedException {
185	>	Thread t = new Thread(new CheckedRunnable() {
186	>	public void realRun() throws InterruptedException {
187		int added = 0;
188		try {
189	<	q.put(new Object());
190	<	++added;
191	<	q.put(new Object());
192	<	++added;
176	<	q.put(new Object());
177	<	++added;
178	<	q.put(new Object());
179	<	++added;
180	<	threadShouldThrow();
189	>	while (true) {
190	>	q.put(added);
191	>	++added;
192	>	}
193		} catch (InterruptedException success) {
194	<	assertTrue(added >= 1);
194	>	assertEquals(1, added);
195		}
196		}});
197
198		t.start();
199		Thread.sleep(SHORT_DELAY_MS);
200	<	q.take();
200	>	assertEquals(0, q.take());
201		Thread.sleep(SHORT_DELAY_MS);
202		t.interrupt();
203		t.join();
#	Line 194 | Line 206 | public class SynchronousQueueTest extend
206		/**
207		* timed offer times out if elements not taken
208		*/
209	<	public void testTimedOffer() throws InterruptedException {
210	<	final SynchronousQueue q = new SynchronousQueue();
211	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
212	<	public void realRun() throws InterruptedException {
213	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
214	<	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
209	>	public void testTimedOffer(final SynchronousQueue q)
210	>	throws InterruptedException {
211	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
212	>	Thread t = newStartedThread(new CheckedRunnable() {
213	>	public void realRun() throws InterruptedException {
214	>	long t0 = System.nanoTime();
215	>	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
216	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
217	>	pleaseInterrupt.countDown();
218	>	t0 = System.nanoTime();
219	>	try {
220	>	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
221	>	shouldThrow();
222	>	} catch (InterruptedException success) {}
223	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
224		}});
225
226	<	t.start();
206	<	Thread.sleep(SMALL_DELAY_MS);
226	>	assertTrue(pleaseInterrupt.await(MEDIUM_DELAY_MS, MILLISECONDS));
227		t.interrupt();
228	<	t.join();
228	>	awaitTermination(t, MEDIUM_DELAY_MS);
229		}
230
211	–
231		/**
232	<	* take blocks interruptibly when empty
232	>	* timed offer times out if elements not taken
233		*/
234	<	public void testTakeFromEmpty() throws InterruptedException {
235	<	final SynchronousQueue q = new SynchronousQueue();
217	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
218	<	public void realRun() throws InterruptedException {
219	<	q.take();
220	<	}});
221	<
222	<	t.start();
223	<	Thread.sleep(SHORT_DELAY_MS);
224	<	t.interrupt();
225	<	t.join();
234	>	public void testTimedOffer() throws InterruptedException {
235	>	testTimedOffer(new SynchronousQueue());
236		}
237
238	+	/**
239	+	* timed offer times out if elements not taken
240	+	*/
241	+	public void testFairTimedOffer() throws InterruptedException {
242	+	testTimedOffer(new SynchronousQueue(true));
243	+	}
244
245		/**
246		* put blocks interruptibly if no active taker
247		*/
248		public void testFairBlockingPut() throws InterruptedException {
249	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
250	<	public void realRun() throws InterruptedException {
249	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
250	>	public void realRun() throws InterruptedException {
251		SynchronousQueue q = new SynchronousQueue(true);
252		q.put(zero);
253		}});
#	Line 247 | Line 263 | public class SynchronousQueueTest extend
263		*/
264		public void testFairPutWithTake() throws InterruptedException {
265		final SynchronousQueue q = new SynchronousQueue(true);
266	<	Thread t = new Thread(new CheckedRunnable() {
267	<	public void realRun() throws InterruptedException {
266	>	Thread t = new Thread(new CheckedRunnable() {
267	>	public void realRun() throws InterruptedException {
268		int added = 0;
269		try {
270	<	q.put(new Object());
271	<	++added;
272	<	q.put(new Object());
273	<	++added;
258	<	q.put(new Object());
259	<	++added;
260	<	q.put(new Object());
261	<	++added;
262	<	threadShouldThrow();
270	>	while (true) {
271	>	q.put(added);
272	>	++added;
273	>	}
274		} catch (InterruptedException success) {
275	<	assertTrue(added >= 1);
275	>	assertEquals(1, added);
276		}
277		}});
278
279		t.start();
280		Thread.sleep(SHORT_DELAY_MS);
281	<	q.take();
281	>	assertEquals(0, q.take());
282		Thread.sleep(SHORT_DELAY_MS);
283		t.interrupt();
284		t.join();
285		}
286
287		/**
277	–	* timed offer times out if elements not taken
278	–	*/
279	–	public void testFairTimedOffer() throws InterruptedException {
280	–	final SynchronousQueue q = new SynchronousQueue(true);
281	–	Thread t = new Thread(new CheckedInterruptedRunnable() {
282	–	public void realRun() throws InterruptedException {
283	–	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
284	–	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
285	–	}});
286	–
287	–	t.start();
288	–	Thread.sleep(SMALL_DELAY_MS);
289	–	t.interrupt();
290	–	t.join();
291	–	}
292	–
293	–
294	–	/**
288		* take blocks interruptibly when empty
289		*/
290		public void testFairTakeFromEmpty() throws InterruptedException {
291		final SynchronousQueue q = new SynchronousQueue(true);
292	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
293	<	public void realRun() throws InterruptedException {
292	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
293	>	public void realRun() throws InterruptedException {
294		q.take();
295		}});
296
#	Line 308 | Line 301 | public class SynchronousQueueTest extend
301		}
302
303		/**
304	<	* poll fails unless active taker
304	>	* poll return null if no active putter
305		*/
306		public void testPoll() {
307		SynchronousQueue q = new SynchronousQueue();
308	<	assertNull(q.poll());
308	>	assertNull(q.poll());
309		}
310
311		/**
312	<	* timed pool with zero timeout times out if no active taker
312	>	* timed poll with zero timeout times out if no active putter
313		*/
314		public void testTimedPoll0() throws InterruptedException {
315		SynchronousQueue q = new SynchronousQueue();
#	Line 324 | Line 317 | public class SynchronousQueueTest extend
317		}
318
319		/**
320	<	* timed pool with nonzero timeout times out if no active taker
320	>	* timed poll with nonzero timeout times out if no active putter
321		*/
322		public void testTimedPoll() throws InterruptedException {
323		SynchronousQueue q = new SynchronousQueue();
324	+	long t0 = System.nanoTime();
325		assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
326	+	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
327		}
328
329		/**
330		* Interrupted timed poll throws InterruptedException instead of
331		* returning timeout status
332		*/
333	<	public void testInterruptedTimedPoll() throws InterruptedException {
334	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
335	<	public void realRun() throws InterruptedException {
336	<	SynchronousQueue q = new SynchronousQueue();
337	<	q.poll(SMALL_DELAY_MS, MILLISECONDS);
333	>	public void testInterruptedTimedPoll(final SynchronousQueue q)
334	>	throws InterruptedException {
335	>	final CountDownLatch threadStarted = new CountDownLatch(1);
336	>	Thread t = newStartedThread(new CheckedRunnable() {
337	>	public void realRun() throws InterruptedException {
338	>	long t0 = System.nanoTime();
339	>	threadStarted.countDown();
340	>	try {
341	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
342	>	shouldThrow();
343	>	} catch (InterruptedException success) {}
344	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
345	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
346		}});
347
348	<	t.start();
348	>	threadStarted.await();
349		Thread.sleep(SHORT_DELAY_MS);
350		t.interrupt();
351	<	t.join();
351	>	awaitTermination(t, MEDIUM_DELAY_MS);
352		}
353
354		/**
355	<	*  timed poll before a delayed offer fails; after offer succeeds;
356	<	*  on interruption throws
355	>	* Interrupted timed poll throws InterruptedException instead of
356	>	* returning timeout status
357		*/
358	<	public void testTimedPollWithOffer() throws InterruptedException {
359	<	final SynchronousQueue q = new SynchronousQueue();
357	<	Thread t = new Thread(new CheckedRunnable() {
358	<	public void realRun() throws InterruptedException {
359	<	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
360	<	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
361	<	try {
362	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
363	<	threadShouldThrow();
364	<	} catch (InterruptedException success) {}
365	<	}});
366	<
367	<	t.start();
368	<	Thread.sleep(SMALL_DELAY_MS);
369	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
370	<	t.interrupt();
371	<	t.join();
358	>	public void testInterruptedTimedPoll() throws InterruptedException {
359	>	testInterruptedTimedPoll(new SynchronousQueue());
360		}
361
362		/**
#	Line 376 | Line 364 | public class SynchronousQueueTest extend
364		* returning timeout status
365		*/
366		public void testFairInterruptedTimedPoll() throws InterruptedException {
367	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
380	<	public void realRun() throws InterruptedException {
381	<	SynchronousQueue q = new SynchronousQueue(true);
382	<	q.poll(SMALL_DELAY_MS, MILLISECONDS);
383	<	}});
384	<
385	<	t.start();
386	<	Thread.sleep(SHORT_DELAY_MS);
387	<	t.interrupt();
388	<	t.join();
367	>	testInterruptedTimedPoll(new SynchronousQueue(true));
368		}
369
370		/**
371	<	*  timed poll before a delayed offer fails; after offer succeeds;
372	<	*  on interruption throws
371	>	* timed poll before a delayed offer times out, returning null;
372	>	* after offer succeeds; on interruption throws
373		*/
374		public void testFairTimedPollWithOffer() throws InterruptedException {
375		final SynchronousQueue q = new SynchronousQueue(true);
376	<	Thread t = new Thread(new CheckedRunnable() {
377	<	public void realRun() throws InterruptedException {
378	<	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
376	>	final CountDownLatch pleaseOffer = new CountDownLatch(1);
377	>	Thread t = newStartedThread(new CheckedRunnable() {
378	>	public void realRun() throws InterruptedException {
379	>	long t0 = System.nanoTime();
380	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
381	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
382	>
383	>	pleaseOffer.countDown();
384	>	t0 = System.nanoTime();
385		assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
386	+	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
387	+
388	+	t0 = System.nanoTime();
389		try {
390		q.poll(LONG_DELAY_MS, MILLISECONDS);
391	<	threadShouldThrow();
391	>	shouldThrow();
392		} catch (InterruptedException success) {}
393	+	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
394		}});
395
396	<	t.start();
397	<	Thread.sleep(SMALL_DELAY_MS);
398	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
396	>	assertTrue(pleaseOffer.await(MEDIUM_DELAY_MS, MILLISECONDS));
397	>	long t0 = System.nanoTime();
398	>	assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS));
399	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
400	>
401		t.interrupt();
402	<	t.join();
402	>	awaitTermination(t, MEDIUM_DELAY_MS);
403		}
404
414	–
405		/**
406	<	* peek returns null
406	>	* peek() returns null if no active putter
407		*/
408		public void testPeek() {
409		SynchronousQueue q = new SynchronousQueue();
410	<	assertNull(q.peek());
410	>	assertNull(q.peek());
411		}
412
413		/**
414	<	* element throws NSEE
414	>	* element() throws NSEE if no active putter
415		*/
416		public void testElement() {
417		SynchronousQueue q = new SynchronousQueue();
#	Line 432 | Line 422 | public class SynchronousQueueTest extend
422		}
423
424		/**
425	<	* remove throws NSEE if no active taker
425	>	* remove() throws NSEE if no active putter
426		*/
427		public void testRemove() {
428		SynchronousQueue q = new SynchronousQueue();
429		try {
430		q.remove();
431		shouldThrow();
432	<	} catch (NoSuchElementException success) {
443	<	}
432	>	} catch (NoSuchElementException success) {}
433		}
434
435		/**
#	Line 508 | Line 497 | public class SynchronousQueueTest extend
497		*/
498		public void testToArray() {
499		SynchronousQueue q = new SynchronousQueue();
500	<	Object[] o = q.toArray();
500	>	Object[] o = q.toArray();
501		assertEquals(o.length, 0);
502		}
503
#	Line 517 | Line 506 | public class SynchronousQueueTest extend
506		*/
507		public void testToArray2() {
508		SynchronousQueue q = new SynchronousQueue();
509	<	Integer[] ints = new Integer[1];
509	>	Integer[] ints = new Integer[1];
510		assertNull(ints[0]);
511		}
512
#	Line 525 | Line 514 | public class SynchronousQueueTest extend
514		* toArray(null) throws NPE
515		*/
516		public void testToArray_BadArg() {
517	<	try {
518	<	SynchronousQueue q = new SynchronousQueue();
519	<	Object o[] = q.toArray(null);
520	<	shouldThrow();
521	<	} catch (NullPointerException success) {}
517	>	SynchronousQueue q = new SynchronousQueue();
518	>	try {
519	>	Object o[] = q.toArray(null);
520	>	shouldThrow();
521	>	} catch (NullPointerException success) {}
522		}
523
524
#	Line 538 | Line 527 | public class SynchronousQueueTest extend
527		*/
528		public void testIterator() {
529		SynchronousQueue q = new SynchronousQueue();
530	<	Iterator it = q.iterator();
530	>	Iterator it = q.iterator();
531		assertFalse(it.hasNext());
532		try {
533		Object x = it.next();
#	Line 551 | Line 540 | public class SynchronousQueueTest extend
540		*/
541		public void testIteratorRemove() {
542		SynchronousQueue q = new SynchronousQueue();
543	<	Iterator it = q.iterator();
543	>	Iterator it = q.iterator();
544		try {
545		it.remove();
546		shouldThrow();
#	Line 574 | Line 563 | public class SynchronousQueueTest extend
563		public void testOfferInExecutor() {
564		final SynchronousQueue q = new SynchronousQueue();
565		ExecutorService executor = Executors.newFixedThreadPool(2);
577	–	final Integer one = new Integer(1);
566
567		executor.execute(new CheckedRunnable() {
568	<	public void realRun() throws InterruptedException {
569	<	threadAssertFalse(q.offer(one));
570	<	threadAssertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
571	<	threadAssertEquals(0, q.remainingCapacity());
568	>	public void realRun() throws InterruptedException {
569	>	assertFalse(q.offer(one));
570	>	assertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
571	>	assertEquals(0, q.remainingCapacity());
572		}});
573
574		executor.execute(new CheckedRunnable() {
575	<	public void realRun() throws InterruptedException {
575	>	public void realRun() throws InterruptedException {
576		Thread.sleep(SMALL_DELAY_MS);
577	<	threadAssertEquals(one, q.take());
577	>	assertSame(one, q.take());
578		}});
579
580		joinPool(executor);
593	–
581		}
582
583		/**
#	Line 600 | Line 587 | public class SynchronousQueueTest extend
587		final SynchronousQueue q = new SynchronousQueue();
588		ExecutorService executor = Executors.newFixedThreadPool(2);
589		executor.execute(new CheckedRunnable() {
590	<	public void realRun() throws InterruptedException {
591	<	threadAssertNull(q.poll());
592	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
593	<	threadAssertTrue(q.isEmpty());
590	>	public void realRun() throws InterruptedException {
591	>	assertNull(q.poll());
592	>	assertSame(one, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
593	>	assertTrue(q.isEmpty());
594		}});
595
596		executor.execute(new CheckedRunnable() {
597	<	public void realRun() throws InterruptedException {
598	<	Thread.sleep(SMALL_DELAY_MS);
599	<	q.put(new Integer(1));
597	>	public void realRun() throws InterruptedException {
598	>	Thread.sleep(SHORT_DELAY_MS);
599	>	q.put(one);
600		}});
601
602		joinPool(executor);
#	Line 671 | Line 658 | public class SynchronousQueueTest extend
658		*/
659		public void testDrainToWithActivePut() throws InterruptedException {
660		final SynchronousQueue q = new SynchronousQueue();
661	<	Thread t = new Thread(new CheckedRunnable() {
662	<	public void realRun() throws InterruptedException {
661	>	Thread t = new Thread(new CheckedRunnable() {
662	>	public void realRun() throws InterruptedException {
663		q.put(new Integer(1));
664		}});
665
#	Line 706 | Line 693 | public class SynchronousQueueTest extend
693		try {
694		q.drainTo(q, 0);
695		shouldThrow();
696	<	} catch (IllegalArgumentException success) {
710	<	}
696	>	} catch (IllegalArgumentException success) {}
697		}
698
699		/**
#	Line 715 | Line 701 | public class SynchronousQueueTest extend
701		*/
702		public void testDrainToN() throws InterruptedException {
703		final SynchronousQueue q = new SynchronousQueue();
704	<	Thread t1 = new Thread(new CheckedRunnable() {
705	<	public void realRun() throws InterruptedException {
704	>	Thread t1 = new Thread(new CheckedRunnable() {
705	>	public void realRun() throws InterruptedException {
706		q.put(one);
707		}});
708
709	<	Thread t2 = new Thread(new CheckedRunnable() {
710	<	public void realRun() throws InterruptedException {
709	>	Thread t2 = new Thread(new CheckedRunnable() {
710	>	public void realRun() throws InterruptedException {
711		q.put(two);
712		}});
713
#	Line 730 | Line 716 | public class SynchronousQueueTest extend
716		ArrayList l = new ArrayList();
717		Thread.sleep(SHORT_DELAY_MS);
718		q.drainTo(l, 1);
719	<	assertTrue(l.size() == 1);
719	>	assertEquals(1, l.size());
720		q.drainTo(l, 1);
721	<	assertTrue(l.size() == 2);
721	>	assertEquals(2, l.size());
722		assertTrue(l.contains(one));
723		assertTrue(l.contains(two));
724		t1.join();

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