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Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.5 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.13 by jsr166, Thu Nov 19 01:15:42 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() {
#	Line 32 | Line 34 | public class SynchronousQueueTest extend
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	+	}
46	+
47	+	/**
48		* offer(null) throws NPE
49		*/
50		public void testOfferNull() {
#	Line 39 | Line 52 | public class SynchronousQueueTest extend
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 59 | Line 83 | public class SynchronousQueueTest extend
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	<	}
75	<	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() {
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	>	threadAssertFalse(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 237 | Line 318 | public class SynchronousQueueTest extend
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	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
340	>	public void realRun() throws InterruptedException {
341	>	SynchronousQueue q = new SynchronousQueue();
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	>	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();
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	>	threadAssertNull(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 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){
443	<	}
442	>	} catch (NoSuchElementException success) {
443	>	}
444		}
445
446		/**
#	Line 350 | Line 451 | public class SynchronousQueueTest extend
451		assertFalse(q.remove(zero));
452		assertTrue(q.isEmpty());
453		}
454	<
454	>
455		/**
456		* contains returns false
457		*/
#	Line 419 | Line 520 | public class SynchronousQueueTest extend
520		Integer[] ints = new Integer[1];
521		assertNull(ints[0]);
522		}
523	<
523	>
524	>	/**
525	>	* toArray(null) throws NPE
526	>	*/
527	>	public void testToArray_BadArg() {
528	>	try {
529	>	SynchronousQueue q = new SynchronousQueue();
530	>	Object o[] = q.toArray(null);
531	>	shouldThrow();
532	>	} catch (NullPointerException success) {}
533	>	}
534	>
535	>
536		/**
537		* iterator does not traverse any elements
538		*/
#	Line 430 | Line 543 | public class SynchronousQueueTest extend
543		try {
544		Object x = it.next();
545		shouldThrow();
546	<	}
434	<	catch (NoSuchElementException success) {}
546	>	} catch (NoSuchElementException success) {}
547		}
548
549		/**
#	Line 443 | Line 555 | public class SynchronousQueueTest extend
555		try {
556		it.remove();
557		shouldThrow();
558	<	}
447	<	catch (IllegalStateException success) {}
558	>	} catch (IllegalStateException success) {}
559		}
560
561		/**
#	Line 454 | Line 565 | public class SynchronousQueueTest extend
565		SynchronousQueue q = new SynchronousQueue();
566		String s = q.toString();
567		assertNotNull(s);
568	<	}
568	>	}
569
570
571		/**
#	Line 465 | Line 576 | public class SynchronousQueueTest extend
576		ExecutorService executor = Executors.newFixedThreadPool(2);
577		final Integer one = new Integer(1);
578
579	<	executor.execute(new Runnable() {
580	<	public void run() {
579	>	executor.execute(new CheckedRunnable() {
580	>	public void realRun() throws InterruptedException {
581		threadAssertFalse(q.offer(one));
582	<	try {
583	<	threadAssertTrue(q.offer(one, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
584	<	threadAssertEquals(0, q.remainingCapacity());
585	<	}
586	<	catch (InterruptedException e) {
587	<	threadUnexpectedException();
588	<	}
589	<	}
590	<	});
582	>	threadAssertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
583	>	threadAssertEquals(0, q.remainingCapacity());
584	>	}});
585	>
586	>	executor.execute(new CheckedRunnable() {
587	>	public void realRun() throws InterruptedException {
588	>	Thread.sleep(SMALL_DELAY_MS);
589	>	threadAssertEquals(one, q.take());
590	>	}});
591
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	–
592		joinPool(executor);
593
594		}
#	Line 500 | Line 599 | public class SynchronousQueueTest extend
599		public void testPollInExecutor() {
600		final SynchronousQueue q = new SynchronousQueue();
601		ExecutorService executor = Executors.newFixedThreadPool(2);
602	<	executor.execute(new Runnable() {
603	<	public void run() {
602	>	executor.execute(new CheckedRunnable() {
603	>	public void realRun() throws InterruptedException {
604		threadAssertNull(q.poll());
605	<	try {
606	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
607	<	threadAssertTrue(q.isEmpty());
608	<	}
609	<	catch (InterruptedException e) {
610	<	threadUnexpectedException();
611	<	}
612	<	}
613	<	});
605	>	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
606	>	threadAssertTrue(q.isEmpty());
607	>	}});
608	>
609	>	executor.execute(new CheckedRunnable() {
610	>	public void realRun() throws InterruptedException {
611	>	Thread.sleep(SMALL_DELAY_MS);
612	>	q.put(new Integer(1));
613	>	}});
614
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	–
615		joinPool(executor);
616		}
617
618		/**
619		* a deserialized serialized queue is usable
620		*/
621	<	public void testSerialization() {
621	>	public void testSerialization() throws Exception {
622	>	SynchronousQueue q = new SynchronousQueue();
623	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
624	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
625	>	out.writeObject(q);
626	>	out.close();
627	>
628	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
629	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
630	>	SynchronousQueue r = (SynchronousQueue)in.readObject();
631	>	assertEquals(q.size(), r.size());
632	>	while (!q.isEmpty())
633	>	assertEquals(q.remove(), r.remove());
634	>	}
635	>
636	>	/**
637	>	* drainTo(null) throws NPE
638	>	*/
639	>	public void testDrainToNull() {
640	>	SynchronousQueue q = new SynchronousQueue();
641	>	try {
642	>	q.drainTo(null);
643	>	shouldThrow();
644	>	} catch (NullPointerException success) {}
645	>	}
646	>
647	>	/**
648	>	* drainTo(this) throws IAE
649	>	*/
650	>	public void testDrainToSelf() {
651	>	SynchronousQueue q = new SynchronousQueue();
652	>	try {
653	>	q.drainTo(q);
654	>	shouldThrow();
655	>	} catch (IllegalArgumentException success) {}
656	>	}
657	>
658	>	/**
659	>	* drainTo(c) of empty queue doesn't transfer elements
660	>	*/
661	>	public void testDrainTo() {
662	>	SynchronousQueue q = new SynchronousQueue();
663	>	ArrayList l = new ArrayList();
664	>	q.drainTo(l);
665	>	assertEquals(q.size(), 0);
666	>	assertEquals(l.size(), 0);
667	>	}
668	>
669	>	/**
670	>	* drainTo empties queue, unblocking a waiting put.
671	>	*/
672	>	public void testDrainToWithActivePut() throws InterruptedException {
673	>	final SynchronousQueue q = new SynchronousQueue();
674	>	Thread t = new Thread(new CheckedRunnable() {
675	>	public void realRun() throws InterruptedException {
676	>	q.put(new Integer(1));
677	>	}});
678	>
679	>	t.start();
680	>	ArrayList l = new ArrayList();
681	>	Thread.sleep(SHORT_DELAY_MS);
682	>	q.drainTo(l);
683	>	assertTrue(l.size() <= 1);
684	>	if (l.size() > 0)
685	>	assertEquals(l.get(0), new Integer(1));
686	>	t.join();
687	>	assertTrue(l.size() <= 1);
688	>	}
689	>
690	>	/**
691	>	* drainTo(null, n) throws NPE
692	>	*/
693	>	public void testDrainToNullN() {
694	>	SynchronousQueue q = new SynchronousQueue();
695	>	try {
696	>	q.drainTo(null, 0);
697	>	shouldThrow();
698	>	} catch (NullPointerException success) {}
699	>	}
700	>
701	>	/**
702	>	* drainTo(this, n) throws IAE
703	>	*/
704	>	public void testDrainToSelfN() {
705		SynchronousQueue q = new SynchronousQueue();
706		try {
707	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
708	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
709	<	out.writeObject(q);
540	<	out.close();
541	<
542	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
543	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
544	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
545	<	assertEquals(q.size(), r.size());
546	<	while (!q.isEmpty())
547	<	assertEquals(q.remove(), r.remove());
548	<	} catch(Exception e){
549	<	unexpectedException();
707	>	q.drainTo(q, 0);
708	>	shouldThrow();
709	>	} catch (IllegalArgumentException success) {
710		}
711		}
712
713	+	/**
714	+	* drainTo(c, n) empties up to n elements of queue into c
715	+	*/
716	+	public void testDrainToN() throws InterruptedException {
717	+	final SynchronousQueue q = new SynchronousQueue();
718	+	Thread t1 = new Thread(new CheckedRunnable() {
719	+	public void realRun() throws InterruptedException {
720	+	q.put(one);
721	+	}});
722	+
723	+	Thread t2 = new Thread(new CheckedRunnable() {
724	+	public void realRun() throws InterruptedException {
725	+	q.put(two);
726	+	}});
727	+
728	+	t1.start();
729	+	t2.start();
730	+	ArrayList l = new ArrayList();
731	+	Thread.sleep(SHORT_DELAY_MS);
732	+	q.drainTo(l, 1);
733	+	assertTrue(l.size() == 1);
734	+	q.drainTo(l, 1);
735	+	assertTrue(l.size() == 2);
736	+	assertTrue(l.contains(one));
737	+	assertTrue(l.contains(two));
738	+	t1.join();
739	+	t2.join();
740	+	}
741	+
742		}

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