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

Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.5 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.17 by jsr166, Sat Nov 21 22:00:46 2009 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/licenses/publicdomain
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10		import java.util.*;
11		import java.util.concurrent.*;
12	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13		import java.io.*;
14
15		public class SynchronousQueueTest extends JSR166TestCase {
16
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run (suite());
19		}
20
21		public static Test suite() {
22	<	return new TestSuite(SynchronousQueueTest.class);
22	>	return new TestSuite(SynchronousQueueTest.class);
23		}
24
25		/**
#	Line 26 | Line 28 | public class SynchronousQueueTest extend
28		public void testEmptyFull() {
29		SynchronousQueue q = new SynchronousQueue();
30		assertTrue(q.isEmpty());
31	<	assertEquals(0, q.size());
31	>	assertEquals(0, q.size());
32	>	assertEquals(0, q.remainingCapacity());
33	>	assertFalse(q.offer(zero));
34	>	}
35	>
36	>	/**
37	>	* A fair SynchronousQueue is both empty and full
38	>	*/
39	>	public void testFairEmptyFull() {
40	>	SynchronousQueue q = new SynchronousQueue(true);
41	>	assertTrue(q.isEmpty());
42	>	assertEquals(0, q.size());
43		assertEquals(0, q.remainingCapacity());
44		assertFalse(q.offer(zero));
45		}
#	Line 35 | Line 48 | public class SynchronousQueueTest extend
48		* offer(null) throws NPE
49		*/
50		public void testOfferNull() {
51	<	try {
51	>	try {
52		SynchronousQueue q = new SynchronousQueue();
53		q.offer(null);
54		shouldThrow();
55	<	} catch (NullPointerException success) { }
55	>	} catch (NullPointerException success) {}
56	>	}
57	>
58	>	/**
59	>	* add(null) throws NPE
60	>	*/
61	>	public void testAddNull() {
62	>	try {
63	>	SynchronousQueue q = new SynchronousQueue();
64	>	q.add(null);
65	>	shouldThrow();
66	>	} catch (NullPointerException success) {}
67		}
68
69		/**
#	Line 54 | Line 78 | public class SynchronousQueueTest extend
78		* add throws ISE if no active taker
79		*/
80		public void testAdd() {
81	<	try {
81	>	try {
82		SynchronousQueue q = new SynchronousQueue();
83		assertEquals(0, q.remainingCapacity());
84		q.add(one);
85		shouldThrow();
86	<	} catch (IllegalStateException success){
63	<	}
86	>	} catch (IllegalStateException success) {}
87		}
88
89		/**
#	Line 71 | Line 94 | public class SynchronousQueueTest extend
94		SynchronousQueue q = new SynchronousQueue();
95		q.addAll(null);
96		shouldThrow();
97	<	}
98	<	catch (NullPointerException success) {}
97	>	} catch (NullPointerException success) {}
98	>	}
99	>
100	>	/**
101	>	* addAll(this) throws IAE
102	>	*/
103	>	public void testAddAllSelf() {
104	>	try {
105	>	SynchronousQueue q = new SynchronousQueue();
106	>	q.addAll(q);
107	>	shouldThrow();
108	>	} catch (IllegalArgumentException success) {}
109		}
110	+
111		/**
112		* addAll of a collection with null elements throws NPE
113		*/
#	Line 83 | Line 117 | public class SynchronousQueueTest extend
117		Integer[] ints = new Integer[1];
118		q.addAll(Arrays.asList(ints));
119		shouldThrow();
120	<	}
87	<	catch (NullPointerException success) {}
120	>	} catch (NullPointerException success) {}
121		}
122		/**
123		* addAll throws ISE if no active taker
#	Line 97 | Line 130 | public class SynchronousQueueTest extend
130		ints[i] = new Integer(i);
131		q.addAll(Arrays.asList(ints));
132		shouldThrow();
133	<	}
101	<	catch (IllegalStateException success) {}
133	>	} catch (IllegalStateException success) {}
134		}
135
136		/**
137		* put(null) throws NPE
138		*/
139	<	public void testPutNull() {
140	<	try {
139	>	public void testPutNull() throws InterruptedException {
140	>	try {
141		SynchronousQueue q = new SynchronousQueue();
142		q.put(null);
143		shouldThrow();
144	<	}
113	<	catch (NullPointerException success){
114	<	}
115	<	catch (InterruptedException ie) {
116	<	unexpectedException();
117	<	}
144	>	} catch (NullPointerException success) {}
145		}
146
147		/**
148		* put blocks interruptibly if no active taker
149		*/
150	<	public void testBlockingPut() {
151	<	Thread t = new Thread(new Runnable() {
152	<	public void run() {
153	<	try {
154	<	SynchronousQueue q = new SynchronousQueue();
155	<	q.put(zero);
156	<	threadShouldThrow();
157	<	} catch (InterruptedException ie){
158	<	}
159	<	}});
160	<	t.start();
134	<	try {
135	<	Thread.sleep(SHORT_DELAY_MS);
136	<	t.interrupt();
137	<	t.join();
138	<	}
139	<	catch (InterruptedException ie) {
140	<	unexpectedException();
141	<	}
150	>	public void testBlockingPut() throws InterruptedException {
151	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
152	>	public void realRun() throws InterruptedException {
153	>	SynchronousQueue q = new SynchronousQueue();
154	>	q.put(zero);
155	>	}});
156	>
157	>	t.start();
158	>	Thread.sleep(SHORT_DELAY_MS);
159	>	t.interrupt();
160	>	t.join();
161		}
162
163		/**
164	<	* put blocks waiting for take
164	>	* put blocks waiting for take
165		*/
166	<	public void testPutWithTake() {
166	>	public void testPutWithTake() throws InterruptedException {
167		final SynchronousQueue q = new SynchronousQueue();
168	<	Thread t = new Thread(new Runnable() {
169	<	public void run() {
170	<	int added = 0;
171	<	try {
172	<	q.put(new Object());
173	<	++added;
174	<	q.put(new Object());
175	<	++added;
176	<	q.put(new Object());
177	<	++added;
178	<	q.put(new Object());
179	<	++added;
180	<	threadShouldThrow();
181	<	} catch (InterruptedException e){
182	<	assertTrue(added >= 1);
164	<	}
168	>	Thread t = new Thread(new CheckedRunnable() {
169	>	public void realRun() throws InterruptedException {
170	>	int added = 0;
171	>	try {
172	>	q.put(new Object());
173	>	++added;
174	>	q.put(new Object());
175	>	++added;
176	>	q.put(new Object());
177	>	++added;
178	>	q.put(new Object());
179	>	++added;
180	>	threadShouldThrow();
181	>	} catch (InterruptedException success) {
182	>	assertTrue(added >= 1);
183		}
184	<	});
185	<	try {
186	<	t.start();
187	<	Thread.sleep(SHORT_DELAY_MS);
188	<	q.take();
189	<	Thread.sleep(SHORT_DELAY_MS);
190	<	t.interrupt();
191	<	t.join();
174	<	} catch (Exception e){
175	<	unexpectedException();
176	<	}
184	>	}});
185	>
186	>	t.start();
187	>	Thread.sleep(SHORT_DELAY_MS);
188	>	q.take();
189	>	Thread.sleep(SHORT_DELAY_MS);
190	>	t.interrupt();
191	>	t.join();
192		}
193
194		/**
195		* timed offer times out if elements not taken
196		*/
197	<	public void testTimedOffer() {
197	>	public void testTimedOffer() throws InterruptedException {
198		final SynchronousQueue q = new SynchronousQueue();
199	<	Thread t = new Thread(new Runnable() {
200	<	public void run() {
201	<	try {
202	<
203	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
204	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
205	<	threadShouldThrow();
206	<	} catch (InterruptedException success){}
207	<	}
208	<	});
194	<
195	<	try {
196	<	t.start();
197	<	Thread.sleep(SMALL_DELAY_MS);
198	<	t.interrupt();
199	<	t.join();
200	<	} catch (Exception e){
201	<	unexpectedException();
202	<	}
199	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
200	>	public void realRun() throws InterruptedException {
201	>	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
202	>	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
203	>	}});
204	>
205	>	t.start();
206	>	Thread.sleep(SMALL_DELAY_MS);
207	>	t.interrupt();
208	>	t.join();
209		}
210
211
212		/**
213		* take blocks interruptibly when empty
214		*/
215	<	public void testTakeFromEmpty() {
215	>	public void testTakeFromEmpty() throws InterruptedException {
216		final SynchronousQueue q = new SynchronousQueue();
217	<	Thread t = new Thread(new Runnable() {
218	<	public void run() {
219	<	try {
220	<	q.take();
221	<	threadShouldThrow();
222	<	} catch (InterruptedException success){ }
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();
226	>	}
227	>
228	>
229	>	/**
230	>	* put blocks interruptibly if no active taker
231	>	*/
232	>	public void testFairBlockingPut() throws InterruptedException {
233	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
234	>	public void realRun() throws InterruptedException {
235	>	SynchronousQueue q = new SynchronousQueue(true);
236	>	q.put(zero);
237	>	}});
238	>
239	>	t.start();
240	>	Thread.sleep(SHORT_DELAY_MS);
241	>	t.interrupt();
242	>	t.join();
243	>	}
244	>
245	>	/**
246	>	* put blocks waiting for take
247	>	*/
248	>	public void testFairPutWithTake() throws InterruptedException {
249	>	final SynchronousQueue q = new SynchronousQueue(true);
250	>	Thread t = new Thread(new CheckedRunnable() {
251	>	public void realRun() throws InterruptedException {
252	>	int added = 0;
253	>	try {
254	>	q.put(new Object());
255	>	++added;
256	>	q.put(new Object());
257	>	++added;
258	>	q.put(new Object());
259	>	++added;
260	>	q.put(new Object());
261	>	++added;
262	>	threadShouldThrow();
263	>	} catch (InterruptedException success) {
264	>	assertTrue(added >= 1);
265		}
266	<	});
267	<	try {
268	<	t.start();
269	<	Thread.sleep(SHORT_DELAY_MS);
270	<	t.interrupt();
271	<	t.join();
272	<	} catch (Exception e){
273	<	unexpectedException();
274	<	}
266	>	}});
267	>
268	>	t.start();
269	>	Thread.sleep(SHORT_DELAY_MS);
270	>	q.take();
271	>	Thread.sleep(SHORT_DELAY_MS);
272	>	t.interrupt();
273	>	t.join();
274	>	}
275	>
276	>	/**
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	>	/**
295	>	* take blocks interruptibly when empty
296	>	*/
297	>	public void testFairTakeFromEmpty() throws InterruptedException {
298	>	final SynchronousQueue q = new SynchronousQueue(true);
299	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
300	>	public void realRun() throws InterruptedException {
301	>	q.take();
302	>	}});
303	>
304	>	t.start();
305	>	Thread.sleep(SHORT_DELAY_MS);
306	>	t.interrupt();
307	>	t.join();
308		}
309
310		/**
#	Line 231 | Line 312 | public class SynchronousQueueTest extend
312		*/
313		public void testPoll() {
314		SynchronousQueue q = new SynchronousQueue();
315	<	assertNull(q.poll());
315	>	assertNull(q.poll());
316		}
317
318		/**
319		* timed pool with zero timeout times out if no active taker
320		*/
321	<	public void testTimedPoll0() {
322	<	try {
323	<	SynchronousQueue q = new SynchronousQueue();
243	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
244	<	} catch (InterruptedException e){
245	<	unexpectedException();
246	<	}
321	>	public void testTimedPoll0() throws InterruptedException {
322	>	SynchronousQueue q = new SynchronousQueue();
323	>	assertNull(q.poll(0, MILLISECONDS));
324		}
325
326		/**
327		* timed pool with nonzero timeout times out if no active taker
328		*/
329	<	public void testTimedPoll() {
330	<	try {
331	<	SynchronousQueue q = new SynchronousQueue();
255	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
256	<	} catch (InterruptedException e){
257	<	unexpectedException();
258	<	}
329	>	public void testTimedPoll() throws InterruptedException {
330	>	SynchronousQueue q = new SynchronousQueue();
331	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
332		}
333
334		/**
335		* Interrupted timed poll throws InterruptedException instead of
336		* returning timeout status
337		*/
338	<	public void testInterruptedTimedPoll() {
339	<	Thread t = new Thread(new Runnable() {
340	<	public void run() {
341	<	try {
342	<	SynchronousQueue q = new SynchronousQueue();
343	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
344	<	} catch (InterruptedException success){
345	<	}
346	<	}});
347	<	t.start();
348	<	try {
276	<	Thread.sleep(SHORT_DELAY_MS);
277	<	t.interrupt();
278	<	t.join();
279	<	}
280	<	catch (InterruptedException ie) {
281	<	unexpectedException();
282	<	}
338	>	public void testInterruptedTimedPoll() throws InterruptedException {
339	>	final SynchronousQueue q = new SynchronousQueue();
340	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
341	>	public void realRun() throws InterruptedException {
342	>	q.poll(SMALL_DELAY_MS, MILLISECONDS);
343	>	}});
344	>
345	>	t.start();
346	>	Thread.sleep(SHORT_DELAY_MS);
347	>	t.interrupt();
348	>	t.join();
349		}
350
351		/**
352		*  timed poll before a delayed offer fails; after offer succeeds;
353		*  on interruption throws
354		*/
355	<	public void testTimedPollWithOffer() {
355	>	public void testTimedPollWithOffer() throws InterruptedException {
356		final SynchronousQueue q = new SynchronousQueue();
357	<	Thread t = new Thread(new Runnable() {
358	<	public void run() {
359	<	try {
360	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
361	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
362	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
363	<	threadShouldThrow();
364	<	} catch (InterruptedException success) { }
365	<	}
366	<	});
367	<	try {
368	<	t.start();
369	<	Thread.sleep(SMALL_DELAY_MS);
370	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
371	<	t.interrupt();
372	<	t.join();
373	<	} catch (Exception e){
374	<	unexpectedException();
375	<	}
376	<	}
357	>	Thread t = new Thread(new CheckedRunnable() {
358	>	public void realRun() throws InterruptedException {
359	>	assertNull(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	>	shouldThrow();
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();
372	>	}
373	>
374	>	/**
375	>	* Interrupted timed poll throws InterruptedException instead of
376	>	* returning timeout status
377	>	*/
378	>	public void testFairInterruptedTimedPoll() throws InterruptedException {
379	>	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();
389	>	}
390	>
391	>	/**
392	>	*  timed poll before a delayed offer fails; after offer succeeds;
393	>	*  on interruption throws
394	>	*/
395	>	public void testFairTimedPollWithOffer() throws InterruptedException {
396	>	final SynchronousQueue q = new SynchronousQueue(true);
397	>	Thread t = new Thread(new CheckedRunnable() {
398	>	public void realRun() throws InterruptedException {
399	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
400	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
401	>	try {
402	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
403	>	threadShouldThrow();
404	>	} catch (InterruptedException success) {}
405	>	}});
406	>
407	>	t.start();
408	>	Thread.sleep(SMALL_DELAY_MS);
409	>	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
410	>	t.interrupt();
411	>	t.join();
412	>	}
413
414
415		/**
#	Line 315 | Line 417 | public class SynchronousQueueTest extend
417		*/
418		public void testPeek() {
419		SynchronousQueue q = new SynchronousQueue();
420	<	assertNull(q.peek());
420	>	assertNull(q.peek());
421		}
422
423		/**
#	Line 326 | Line 428 | public class SynchronousQueueTest extend
428		try {
429		q.element();
430		shouldThrow();
431	<	}
330	<	catch (NoSuchElementException success) {}
431	>	} catch (NoSuchElementException success) {}
432		}
433
434		/**
#	Line 338 | Line 439 | public class SynchronousQueueTest extend
439		try {
440		q.remove();
441		shouldThrow();
442	<	} catch (NoSuchElementException success){
342	<	}
442	>	} catch (NoSuchElementException success) {}
443		}
444
445		/**
#	Line 350 | Line 450 | public class SynchronousQueueTest extend
450		assertFalse(q.remove(zero));
451		assertTrue(q.isEmpty());
452		}
453	<
453	>
454		/**
455		* contains returns false
456		*/
#	Line 407 | Line 507 | public class SynchronousQueueTest extend
507		*/
508		public void testToArray() {
509		SynchronousQueue q = new SynchronousQueue();
510	<	Object[] o = q.toArray();
510	>	Object[] o = q.toArray();
511		assertEquals(o.length, 0);
512		}
513
#	Line 416 | Line 516 | public class SynchronousQueueTest extend
516		*/
517		public void testToArray2() {
518		SynchronousQueue q = new SynchronousQueue();
519	<	Integer[] ints = new Integer[1];
519	>	Integer[] ints = new Integer[1];
520		assertNull(ints[0]);
521		}
522	<
522	>
523	>	/**
524	>	* toArray(null) throws NPE
525	>	*/
526	>	public void testToArray_BadArg() {
527	>	try {
528	>	SynchronousQueue q = new SynchronousQueue();
529	>	Object o[] = q.toArray(null);
530	>	shouldThrow();
531	>	} catch (NullPointerException success) {}
532	>	}
533	>
534	>
535		/**
536		* iterator does not traverse any elements
537		*/
538		public void testIterator() {
539		SynchronousQueue q = new SynchronousQueue();
540	<	Iterator it = q.iterator();
540	>	Iterator it = q.iterator();
541		assertFalse(it.hasNext());
542		try {
543		Object x = it.next();
544		shouldThrow();
545	<	}
434	<	catch (NoSuchElementException success) {}
545	>	} catch (NoSuchElementException success) {}
546		}
547
548		/**
#	Line 439 | Line 550 | public class SynchronousQueueTest extend
550		*/
551		public void testIteratorRemove() {
552		SynchronousQueue q = new SynchronousQueue();
553	<	Iterator it = q.iterator();
553	>	Iterator it = q.iterator();
554		try {
555		it.remove();
556		shouldThrow();
557	<	}
447	<	catch (IllegalStateException success) {}
557	>	} catch (IllegalStateException success) {}
558		}
559
560		/**
#	Line 454 | Line 564 | public class SynchronousQueueTest extend
564		SynchronousQueue q = new SynchronousQueue();
565		String s = q.toString();
566		assertNotNull(s);
567	<	}
567	>	}
568
569
570		/**
#	Line 465 | Line 575 | public class SynchronousQueueTest extend
575		ExecutorService executor = Executors.newFixedThreadPool(2);
576		final Integer one = new Integer(1);
577
578	<	executor.execute(new Runnable() {
579	<	public void run() {
578	>	executor.execute(new CheckedRunnable() {
579	>	public void realRun() throws InterruptedException {
580		threadAssertFalse(q.offer(one));
581	<	try {
582	<	threadAssertTrue(q.offer(one, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
583	<	threadAssertEquals(0, q.remainingCapacity());
584	<	}
585	<	catch (InterruptedException e) {
586	<	threadUnexpectedException();
587	<	}
588	<	}
589	<	});
581	>	threadAssertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
582	>	threadAssertEquals(0, q.remainingCapacity());
583	>	}});
584	>
585	>	executor.execute(new CheckedRunnable() {
586	>	public void realRun() throws InterruptedException {
587	>	Thread.sleep(SMALL_DELAY_MS);
588	>	threadAssertEquals(one, q.take());
589	>	}});
590
481	–	executor.execute(new Runnable() {
482	–	public void run() {
483	–	try {
484	–	Thread.sleep(SMALL_DELAY_MS);
485	–	threadAssertEquals(one, q.take());
486	–	}
487	–	catch (InterruptedException e) {
488	–	threadUnexpectedException();
489	–	}
490	–	}
491	–	});
492	–
591		joinPool(executor);
592
593		}
#	Line 500 | Line 598 | public class SynchronousQueueTest extend
598		public void testPollInExecutor() {
599		final SynchronousQueue q = new SynchronousQueue();
600		ExecutorService executor = Executors.newFixedThreadPool(2);
601	<	executor.execute(new Runnable() {
602	<	public void run() {
601	>	executor.execute(new CheckedRunnable() {
602	>	public void realRun() throws InterruptedException {
603		threadAssertNull(q.poll());
604	<	try {
605	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
606	<	threadAssertTrue(q.isEmpty());
607	<	}
608	<	catch (InterruptedException e) {
609	<	threadUnexpectedException();
610	<	}
611	<	}
612	<	});
604	>	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
605	>	threadAssertTrue(q.isEmpty());
606	>	}});
607	>
608	>	executor.execute(new CheckedRunnable() {
609	>	public void realRun() throws InterruptedException {
610	>	Thread.sleep(SMALL_DELAY_MS);
611	>	q.put(new Integer(1));
612	>	}});
613
516	–	executor.execute(new Runnable() {
517	–	public void run() {
518	–	try {
519	–	Thread.sleep(SMALL_DELAY_MS);
520	–	q.put(new Integer(1));
521	–	}
522	–	catch (InterruptedException e) {
523	–	threadUnexpectedException();
524	–	}
525	–	}
526	–	});
527	–
614		joinPool(executor);
615		}
616
617		/**
618		* a deserialized serialized queue is usable
619		*/
620	<	public void testSerialization() {
620	>	public void testSerialization() throws Exception {
621	>	SynchronousQueue q = new SynchronousQueue();
622	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
623	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
624	>	out.writeObject(q);
625	>	out.close();
626	>
627	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
628	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
629	>	SynchronousQueue r = (SynchronousQueue)in.readObject();
630	>	assertEquals(q.size(), r.size());
631	>	while (!q.isEmpty())
632	>	assertEquals(q.remove(), r.remove());
633	>	}
634	>
635	>	/**
636	>	* drainTo(null) throws NPE
637	>	*/
638	>	public void testDrainToNull() {
639	>	SynchronousQueue q = new SynchronousQueue();
640	>	try {
641	>	q.drainTo(null);
642	>	shouldThrow();
643	>	} catch (NullPointerException success) {}
644	>	}
645	>
646	>	/**
647	>	* drainTo(this) throws IAE
648	>	*/
649	>	public void testDrainToSelf() {
650	>	SynchronousQueue q = new SynchronousQueue();
651	>	try {
652	>	q.drainTo(q);
653	>	shouldThrow();
654	>	} catch (IllegalArgumentException success) {}
655	>	}
656	>
657	>	/**
658	>	* drainTo(c) of empty queue doesn't transfer elements
659	>	*/
660	>	public void testDrainTo() {
661	>	SynchronousQueue q = new SynchronousQueue();
662	>	ArrayList l = new ArrayList();
663	>	q.drainTo(l);
664	>	assertEquals(q.size(), 0);
665	>	assertEquals(l.size(), 0);
666	>	}
667	>
668	>	/**
669	>	* drainTo empties queue, unblocking a waiting put.
670	>	*/
671	>	public void testDrainToWithActivePut() throws InterruptedException {
672	>	final SynchronousQueue q = new SynchronousQueue();
673	>	Thread t = new Thread(new CheckedRunnable() {
674	>	public void realRun() throws InterruptedException {
675	>	q.put(new Integer(1));
676	>	}});
677	>
678	>	t.start();
679	>	ArrayList l = new ArrayList();
680	>	Thread.sleep(SHORT_DELAY_MS);
681	>	q.drainTo(l);
682	>	assertTrue(l.size() <= 1);
683	>	if (l.size() > 0)
684	>	assertEquals(l.get(0), new Integer(1));
685	>	t.join();
686	>	assertTrue(l.size() <= 1);
687	>	}
688	>
689	>	/**
690	>	* drainTo(null, n) throws NPE
691	>	*/
692	>	public void testDrainToNullN() {
693		SynchronousQueue q = new SynchronousQueue();
694		try {
695	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
696	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
697	<	out.writeObject(q);
698	<	out.close();
699	<
700	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
701	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
702	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
703	<	assertEquals(q.size(), r.size());
704	<	while (!q.isEmpty())
705	<	assertEquals(q.remove(), r.remove());
706	<	} catch(Exception e){
707	<	unexpectedException();
708	<	}
695	>	q.drainTo(null, 0);
696	>	shouldThrow();
697	>	} catch (NullPointerException success) {}
698	>	}
699	>
700	>	/**
701	>	* drainTo(this, n) throws IAE
702	>	*/
703	>	public void testDrainToSelfN() {
704	>	SynchronousQueue q = new SynchronousQueue();
705	>	try {
706	>	q.drainTo(q, 0);
707	>	shouldThrow();
708	>	} catch (IllegalArgumentException success) {}
709	>	}
710	>
711	>	/**
712	>	* drainTo(c, n) empties up to n elements of queue into c
713	>	*/
714	>	public void testDrainToN() throws InterruptedException {
715	>	final SynchronousQueue q = new SynchronousQueue();
716	>	Thread t1 = new Thread(new CheckedRunnable() {
717	>	public void realRun() throws InterruptedException {
718	>	q.put(one);
719	>	}});
720	>
721	>	Thread t2 = new Thread(new CheckedRunnable() {
722	>	public void realRun() throws InterruptedException {
723	>	q.put(two);
724	>	}});
725	>
726	>	t1.start();
727	>	t2.start();
728	>	ArrayList l = new ArrayList();
729	>	Thread.sleep(SHORT_DELAY_MS);
730	>	q.drainTo(l, 1);
731	>	assertTrue(l.size() == 1);
732	>	q.drainTo(l, 1);
733	>	assertTrue(l.size() == 2);
734	>	assertTrue(l.contains(one));
735	>	assertTrue(l.contains(two));
736	>	t1.join();
737	>	t2.join();
738		}
739
740		}

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