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

Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:08 2003 UTC vs.
Revision 1.26 by jsr166, Sat Oct 9 19:30:35 2010 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 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	<	*
40	>	* A SynchronousQueue is both empty and full
41		*/
42		public void testEmptyFull() {
43		SynchronousQueue q = new SynchronousQueue();
44		assertTrue(q.isEmpty());
45	<	assertEquals(0, q.size());
45	>	assertEquals(0, q.size());
46	>	assertEquals(0, q.remainingCapacity());
47	>	assertFalse(q.offer(zero));
48	>	}
49	>
50	>	/**
51	>	* A fair SynchronousQueue is both empty and full
52	>	*/
53	>	public void testFairEmptyFull() {
54	>	SynchronousQueue q = new SynchronousQueue(true);
55	>	assertTrue(q.isEmpty());
56	>	assertEquals(0, q.size());
57		assertEquals(0, q.remainingCapacity());
58	<	assertFalse(q.offer(new Integer(3)));
58	>	assertFalse(q.offer(zero));
59		}
60
61		/**
62	<	*
62	>	* offer(null) throws NPE
63		*/
64		public void testOfferNull() {
65	<	try {
65	>	try {
66		SynchronousQueue q = new SynchronousQueue();
67		q.offer(null);
68		shouldThrow();
69	<	} catch (NullPointerException success) { }
69	>	} catch (NullPointerException success) {}
70	>	}
71	>
72	>	/**
73	>	* add(null) throws NPE
74	>	*/
75	>	public void testAddNull() {
76	>	try {
77	>	SynchronousQueue q = new SynchronousQueue();
78	>	q.add(null);
79	>	shouldThrow();
80	>	} catch (NullPointerException success) {}
81		}
82
83		/**
84	<	*
84	>	* offer fails if no active taker
85		*/
86		public void testOffer() {
87		SynchronousQueue q = new SynchronousQueue();
88	<	assertFalse(q.offer(new Integer(1)));
88	>	assertFalse(q.offer(one));
89		}
90
91		/**
92	<	*
92	>	* add throws ISE if no active taker
93		*/
94		public void testAdd() {
95	<	try {
95	>	try {
96		SynchronousQueue q = new SynchronousQueue();
97		assertEquals(0, q.remainingCapacity());
98	<	q.add(new Integer(0));
99	<	} catch (IllegalStateException success){
100	<	}
98	>	q.add(one);
99	>	shouldThrow();
100	>	} catch (IllegalStateException success) {}
101		}
102
103		/**
104	<	*
104	>	* addAll(null) throws NPE
105		*/
106		public void testAddAll1() {
107		try {
108		SynchronousQueue q = new SynchronousQueue();
109		q.addAll(null);
110		shouldThrow();
111	<	}
74	<	catch (NullPointerException success) {}
111	>	} catch (NullPointerException success) {}
112		}
113	+
114		/**
115	<	*
115	>	* addAll(this) throws IAE
116	>	*/
117	>	public void testAddAllSelf() {
118	>	try {
119	>	SynchronousQueue q = new SynchronousQueue();
120	>	q.addAll(q);
121	>	shouldThrow();
122	>	} catch (IllegalArgumentException success) {}
123	>	}
124	>
125	>	/**
126	>	* addAll of a collection with null elements throws NPE
127		*/
128		public void testAddAll2() {
129		try {
#	Line 82 | Line 131 | public class SynchronousQueueTest extend
131		Integer[] ints = new Integer[1];
132		q.addAll(Arrays.asList(ints));
133		shouldThrow();
134	<	}
86	<	catch (NullPointerException success) {}
134	>	} catch (NullPointerException success) {}
135		}
136	+
137		/**
138	<	*
138	>	* addAll throws ISE if no active taker
139		*/
140		public void testAddAll4() {
141		try {
#	Line 96 | Line 145 | public class SynchronousQueueTest extend
145		ints[i] = new Integer(i);
146		q.addAll(Arrays.asList(ints));
147		shouldThrow();
148	<	}
100	<	catch (IllegalStateException success) {}
148	>	} catch (IllegalStateException success) {}
149		}
150
151		/**
152	<	*
152	>	* put(null) throws NPE
153		*/
154	<	public void testPutNull() {
155	<	try {
154	>	public void testPutNull() throws InterruptedException {
155	>	try {
156		SynchronousQueue q = new SynchronousQueue();
157		q.put(null);
158		shouldThrow();
159	<	}
112	<	catch (NullPointerException success){
113	<	}
114	<	catch (InterruptedException ie) {
115	<	unexpectedException();
116	<	}
159	>	} catch (NullPointerException success) {}
160		}
161
162		/**
163	<	*
163	>	* put blocks interruptibly if no active taker
164		*/
165	<	public void testBlockingPut() {
166	<	Thread t = new Thread(new Runnable() {
167	<	public void run() {
168	<	try {
169	<	SynchronousQueue q = new SynchronousQueue();
170	<	q.put(new Integer(0));
171	<	threadShouldThrow();
172	<	} catch (InterruptedException ie){
173	<	}
174	<	}});
175	<	t.start();
133	<	try {
134	<	Thread.sleep(SHORT_DELAY_MS);
135	<	t.interrupt();
136	<	t.join();
137	<	}
138	<	catch (InterruptedException ie) {
139	<	unexpectedException();
140	<	}
165	>	public void testBlockingPut() throws InterruptedException {
166	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
167	>	public void realRun() throws InterruptedException {
168	>	SynchronousQueue q = new SynchronousQueue();
169	>	q.put(zero);
170	>	}});
171	>
172	>	t.start();
173	>	Thread.sleep(SHORT_DELAY_MS);
174	>	t.interrupt();
175	>	t.join();
176		}
177
178		/**
179	<	*
179	>	* put blocks waiting for take
180		*/
181	<	public void testPutWithTake() {
181	>	public void testPutWithTake() throws InterruptedException {
182		final SynchronousQueue q = new SynchronousQueue();
183	<	Thread t = new Thread(new Runnable() {
184	<	public void run() {
185	<	int added = 0;
186	<	try {
187	<	q.put(new Object());
188	<	++added;
154	<	q.put(new Object());
155	<	++added;
156	<	q.put(new Object());
157	<	++added;
158	<	q.put(new Object());
183	>	Thread t = new Thread(new CheckedRunnable() {
184	>	public void realRun() throws InterruptedException {
185	>	int added = 0;
186	>	try {
187	>	while (true) {
188	>	q.put(added);
189		++added;
160	–	threadShouldThrow();
161	–	} catch (InterruptedException e){
162	–	assertTrue(added >= 1);
190		}
191	+	} catch (InterruptedException success) {
192	+	assertEquals(1, added);
193		}
194	<	});
195	<	try {
196	<	t.start();
197	<	Thread.sleep(SHORT_DELAY_MS);
198	<	q.take();
199	<	Thread.sleep(SHORT_DELAY_MS);
200	<	t.interrupt();
201	<	t.join();
173	<	} catch (Exception e){
174	<	unexpectedException();
175	<	}
194	>	}});
195	>
196	>	t.start();
197	>	Thread.sleep(SHORT_DELAY_MS);
198	>	assertEquals(0, q.take());
199	>	Thread.sleep(SHORT_DELAY_MS);
200	>	t.interrupt();
201	>	t.join();
202		}
203
204		/**
205	<	*
205	>	* timed offer times out if elements not taken
206		*/
207	<	public void testTimedOffer() {
207	>	public void testTimedOffer() throws InterruptedException {
208		final SynchronousQueue q = new SynchronousQueue();
209	<	Thread t = new Thread(new Runnable() {
210	<	public void run() {
211	<	try {
212	<
213	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
214	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
215	<	threadShouldThrow();
216	<	} catch (InterruptedException success){}
217	<	}
218	<	});
193	<
194	<	try {
195	<	t.start();
196	<	Thread.sleep(SMALL_DELAY_MS);
197	<	t.interrupt();
198	<	t.join();
199	<	} catch (Exception e){
200	<	unexpectedException();
201	<	}
209	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
210	>	public void realRun() throws InterruptedException {
211	>	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
212	>	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
213	>	}});
214	>
215	>	t.start();
216	>	Thread.sleep(SMALL_DELAY_MS);
217	>	t.interrupt();
218	>	t.join();
219		}
220
221
222		/**
223	<	*
223	>	* take blocks interruptibly when empty
224		*/
225	<	public void testTakeFromEmpty() {
225	>	public void testTakeFromEmpty() throws InterruptedException {
226		final SynchronousQueue q = new SynchronousQueue();
227	<	Thread t = new Thread(new Runnable() {
228	<	public void run() {
229	<	try {
230	<	q.take();
231	<	threadShouldThrow();
232	<	} catch (InterruptedException success){ }
227	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
228	>	public void realRun() throws InterruptedException {
229	>	q.take();
230	>	}});
231	>
232	>	t.start();
233	>	Thread.sleep(SHORT_DELAY_MS);
234	>	t.interrupt();
235	>	t.join();
236	>	}
237	>
238	>
239	>	/**
240	>	* put blocks interruptibly if no active taker
241	>	*/
242	>	public void testFairBlockingPut() throws InterruptedException {
243	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
244	>	public void realRun() throws InterruptedException {
245	>	SynchronousQueue q = new SynchronousQueue(true);
246	>	q.put(zero);
247	>	}});
248	>
249	>	t.start();
250	>	Thread.sleep(SHORT_DELAY_MS);
251	>	t.interrupt();
252	>	t.join();
253	>	}
254	>
255	>	/**
256	>	* put blocks waiting for take
257	>	*/
258	>	public void testFairPutWithTake() throws InterruptedException {
259	>	final SynchronousQueue q = new SynchronousQueue(true);
260	>	Thread t = new Thread(new CheckedRunnable() {
261	>	public void realRun() throws InterruptedException {
262	>	int added = 0;
263	>	try {
264	>	while (true) {
265	>	q.put(added);
266	>	++added;
267	>	}
268	>	} catch (InterruptedException success) {
269	>	assertEquals(1, added);
270		}
271	<	});
272	<	try {
273	<	t.start();
274	<	Thread.sleep(SHORT_DELAY_MS);
275	<	t.interrupt();
276	<	t.join();
277	<	} catch (Exception e){
278	<	unexpectedException();
279	<	}
271	>	}});
272	>
273	>	t.start();
274	>	Thread.sleep(SHORT_DELAY_MS);
275	>	assertEquals(0, q.take());
276	>	Thread.sleep(SHORT_DELAY_MS);
277	>	t.interrupt();
278	>	t.join();
279	>	}
280	>
281	>	/**
282	>	* timed offer times out if elements not taken
283	>	*/
284	>	public void testFairTimedOffer() throws InterruptedException {
285	>	final SynchronousQueue q = new SynchronousQueue(true);
286	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
287	>	public void realRun() throws InterruptedException {
288	>	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
289	>	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
290	>	}});
291	>
292	>	t.start();
293	>	Thread.sleep(SMALL_DELAY_MS);
294	>	t.interrupt();
295	>	t.join();
296		}
297
298	+
299		/**
300	<	*
300	>	* take blocks interruptibly when empty
301	>	*/
302	>	public void testFairTakeFromEmpty() throws InterruptedException {
303	>	final SynchronousQueue q = new SynchronousQueue(true);
304	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
305	>	public void realRun() throws InterruptedException {
306	>	q.take();
307	>	}});
308	>
309	>	t.start();
310	>	Thread.sleep(SHORT_DELAY_MS);
311	>	t.interrupt();
312	>	t.join();
313	>	}
314	>
315	>	/**
316	>	* poll fails unless active taker
317		*/
318		public void testPoll() {
319		SynchronousQueue q = new SynchronousQueue();
320	<	assertNull(q.poll());
320	>	assertNull(q.poll());
321		}
322
323		/**
324	<	*
324	>	* timed pool with zero timeout times out if no active taker
325		*/
326	<	public void testTimedPoll0() {
327	<	try {
328	<	SynchronousQueue q = new SynchronousQueue();
242	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
243	<	} catch (InterruptedException e){
244	<	unexpectedException();
245	<	}
326	>	public void testTimedPoll0() throws InterruptedException {
327	>	SynchronousQueue q = new SynchronousQueue();
328	>	assertNull(q.poll(0, MILLISECONDS));
329		}
330
331		/**
332	<	*
332	>	* timed pool with nonzero timeout times out if no active taker
333		*/
334	<	public void testTimedPoll() {
335	<	try {
336	<	SynchronousQueue q = new SynchronousQueue();
254	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
255	<	} catch (InterruptedException e){
256	<	unexpectedException();
257	<	}
334	>	public void testTimedPoll() throws InterruptedException {
335	>	SynchronousQueue q = new SynchronousQueue();
336	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
337		}
338
339		/**
340	<	*
341	<	*/
342	<	public void testInterruptedTimedPoll() {
343	<	Thread t = new Thread(new Runnable() {
344	<	public void run() {
345	<	try {
346	<	SynchronousQueue q = new SynchronousQueue();
347	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
348	<	} catch (InterruptedException success){
349	<	}
350	<	}});
351	<	t.start();
352	<	try {
353	<	Thread.sleep(SHORT_DELAY_MS);
275	<	t.interrupt();
276	<	t.join();
277	<	}
278	<	catch (InterruptedException ie) {
279	<	unexpectedException();
280	<	}
340	>	* Interrupted timed poll throws InterruptedException instead of
341	>	* returning timeout status
342	>	*/
343	>	public void testInterruptedTimedPoll() throws InterruptedException {
344	>	final SynchronousQueue q = new SynchronousQueue();
345	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
346	>	public void realRun() throws InterruptedException {
347	>	q.poll(SMALL_DELAY_MS, MILLISECONDS);
348	>	}});
349	>
350	>	t.start();
351	>	Thread.sleep(SHORT_DELAY_MS);
352	>	t.interrupt();
353	>	t.join();
354		}
355
356		/**
357	<	*
357	>	* Interrupted timed poll throws InterruptedException instead of
358	>	* returning timeout status
359		*/
360	<	public void testTimedPollWithOffer() {
361	<	final SynchronousQueue q = new SynchronousQueue();
362	<	Thread t = new Thread(new Runnable() {
363	<	public void run() {
364	<	try {
365	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
366	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
367	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
368	<	threadShouldThrow();
369	<	} catch (InterruptedException success) { }
370	<	}
371	<	});
372	<	try {
373	<	t.start();
374	<	Thread.sleep(SMALL_DELAY_MS);
375	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
376	<	t.interrupt();
377	<	t.join();
378	<	} catch (Exception e){
379	<	unexpectedException();
380	<	}
381	<	}
360	>	public void testFairInterruptedTimedPoll() throws InterruptedException {
361	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
362	>	public void realRun() throws InterruptedException {
363	>	SynchronousQueue q = new SynchronousQueue(true);
364	>	q.poll(SMALL_DELAY_MS, MILLISECONDS);
365	>	}});
366	>
367	>	t.start();
368	>	Thread.sleep(SHORT_DELAY_MS);
369	>	t.interrupt();
370	>	t.join();
371	>	}
372	>
373	>	/**
374	>	* timed poll before a delayed offer fails; after offer succeeds;
375	>	* on interruption throws
376	>	*/
377	>	public void testFairTimedPollWithOffer() throws InterruptedException {
378	>	final SynchronousQueue q = new SynchronousQueue(true);
379	>	Thread t = new Thread(new CheckedRunnable() {
380	>	public void realRun() throws InterruptedException {
381	>	try {
382	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
383	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
384	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
385	>	threadShouldThrow();
386	>	} catch (InterruptedException success) {}
387	>	}});
388	>
389	>	t.start();
390	>	Thread.sleep(SMALL_DELAY_MS);
391	>	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
392	>	t.interrupt();
393	>	t.join();
394	>	}
395
396
397		/**
398	<	*
398	>	* peek returns null
399		*/
400		public void testPeek() {
401		SynchronousQueue q = new SynchronousQueue();
402	<	assertNull(q.peek());
402	>	assertNull(q.peek());
403		}
404
405		/**
406	<	*
406	>	* element throws NSEE
407		*/
408		public void testElement() {
409		SynchronousQueue q = new SynchronousQueue();
410		try {
411		q.element();
412		shouldThrow();
413	<	}
327	<	catch (NoSuchElementException success) {}
413	>	} catch (NoSuchElementException success) {}
414		}
415
416		/**
417	<	*
417	>	* remove throws NSEE if no active taker
418		*/
419		public void testRemove() {
420		SynchronousQueue q = new SynchronousQueue();
421		try {
422		q.remove();
423		shouldThrow();
424	<	} catch (NoSuchElementException success){
339	<	}
424	>	} catch (NoSuchElementException success) {}
425		}
426
427		/**
428	<	*
428	>	* remove(x) returns false
429		*/
430		public void testRemoveElement() {
431		SynchronousQueue q = new SynchronousQueue();
432	<	assertFalse(q.remove(new Integer(0)));
432	>	assertFalse(q.remove(zero));
433		assertTrue(q.isEmpty());
434		}
435	<
435	>
436		/**
437	<	*
437	>	* contains returns false
438		*/
439		public void testContains() {
440		SynchronousQueue q = new SynchronousQueue();
441	<	assertFalse(q.contains(new Integer(0)));
441	>	assertFalse(q.contains(zero));
442		}
443
444		/**
445	<	*
445	>	* clear ensures isEmpty
446		*/
447		public void testClear() {
448		SynchronousQueue q = new SynchronousQueue();
#	Line 366 | Line 451 | public class SynchronousQueueTest extend
451		}
452
453		/**
454	<	*
454	>	* containsAll returns false unless empty
455		*/
456		public void testContainsAll() {
457		SynchronousQueue q = new SynchronousQueue();
458		Integer[] empty = new Integer[0];
459	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
459	>	assertTrue(q.containsAll(Arrays.asList(empty)));
460	>	Integer[] ints = new Integer[1]; ints[0] = zero;
461		assertFalse(q.containsAll(Arrays.asList(ints)));
462		}
463
464		/**
465	<	*
465	>	* retainAll returns false
466		*/
467		public void testRetainAll() {
468		SynchronousQueue q = new SynchronousQueue();
469		Integer[] empty = new Integer[0];
470	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
471	<	q.retainAll(Arrays.asList(ints));
472	<	assertFalse(q.containsAll(Arrays.asList(ints)));
470	>	assertFalse(q.retainAll(Arrays.asList(empty)));
471	>	Integer[] ints = new Integer[1]; ints[0] = zero;
472	>	assertFalse(q.retainAll(Arrays.asList(ints)));
473		}
474
475		/**
476	<	*
476	>	* removeAll returns false
477		*/
478		public void testRemoveAll() {
479		SynchronousQueue q = new SynchronousQueue();
480		Integer[] empty = new Integer[0];
481	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
482	<	q.removeAll(Arrays.asList(ints));
481	>	assertFalse(q.removeAll(Arrays.asList(empty)));
482	>	Integer[] ints = new Integer[1]; ints[0] = zero;
483		assertFalse(q.containsAll(Arrays.asList(ints)));
484		}
485
486
487		/**
488	<	*
488	>	* toArray is empty
489		*/
490		public void testToArray() {
491		SynchronousQueue q = new SynchronousQueue();
492	<	Object[] o = q.toArray();
492	>	Object[] o = q.toArray();
493		assertEquals(o.length, 0);
494		}
495
496		/**
497	<	*
497	>	* toArray(a) is nulled at position 0
498		*/
499		public void testToArray2() {
500		SynchronousQueue q = new SynchronousQueue();
501	<	Integer[] ints = new Integer[1];
501	>	Integer[] ints = new Integer[1];
502		assertNull(ints[0]);
503		}
504	<
504	>
505		/**
506	<	*
506	>	* toArray(null) throws NPE
507	>	*/
508	>	public void testToArray_BadArg() {
509	>	SynchronousQueue q = new SynchronousQueue();
510	>	try {
511	>	Object o[] = q.toArray(null);
512	>	shouldThrow();
513	>	} catch (NullPointerException success) {}
514	>	}
515	>
516	>
517	>	/**
518	>	* iterator does not traverse any elements
519		*/
520		public void testIterator() {
521		SynchronousQueue q = new SynchronousQueue();
522	<	Iterator it = q.iterator();
522	>	Iterator it = q.iterator();
523		assertFalse(it.hasNext());
524		try {
525		Object x = it.next();
526		shouldThrow();
527	<	}
430	<	catch (NoSuchElementException success) {}
527	>	} catch (NoSuchElementException success) {}
528		}
529
530		/**
531	<	*
531	>	* iterator remove throws ISE
532		*/
533		public void testIteratorRemove() {
534		SynchronousQueue q = new SynchronousQueue();
535	<	Iterator it = q.iterator();
535	>	Iterator it = q.iterator();
536		try {
537		it.remove();
538		shouldThrow();
539	<	}
443	<	catch (IllegalStateException success) {}
539	>	} catch (IllegalStateException success) {}
540		}
541
542		/**
543	<	*
543	>	* toString returns a non-null string
544		*/
545		public void testToString() {
546		SynchronousQueue q = new SynchronousQueue();
547		String s = q.toString();
548	<	assertTrue(s != null);
549	<	}
548	>	assertNotNull(s);
549	>	}
550
551
552		/**
553	<	*
553	>	* offer transfers elements across Executor tasks
554		*/
555		public void testOfferInExecutor() {
556		final SynchronousQueue q = new SynchronousQueue();
557		ExecutorService executor = Executors.newFixedThreadPool(2);
462	–	final Integer one = new Integer(1);
558
559	<	executor.execute(new Runnable() {
560	<	public void run() {
561	<	threadAssertFalse(q.offer(one));
562	<	try {
563	<	threadAssertTrue(q.offer(one, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
564	<	threadAssertEquals(0, q.remainingCapacity());
565	<	}
566	<	catch (InterruptedException e) {
567	<	threadUnexpectedException();
568	<	}
569	<	}
570	<	});
559	>	executor.execute(new CheckedRunnable() {
560	>	public void realRun() throws InterruptedException {
561	>	assertFalse(q.offer(one));
562	>	assertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
563	>	assertEquals(0, q.remainingCapacity());
564	>	}});
565	>
566	>	executor.execute(new CheckedRunnable() {
567	>	public void realRun() throws InterruptedException {
568	>	Thread.sleep(SMALL_DELAY_MS);
569	>	assertSame(one, q.take());
570	>	}});
571
477	–	executor.execute(new Runnable() {
478	–	public void run() {
479	–	try {
480	–	Thread.sleep(SMALL_DELAY_MS);
481	–	threadAssertEquals(one, q.take());
482	–	}
483	–	catch (InterruptedException e) {
484	–	threadUnexpectedException();
485	–	}
486	–	}
487	–	});
488	–
572		joinPool(executor);
490	–
573		}
574
575		/**
576	<	*
576	>	* poll retrieves elements across Executor threads
577		*/
578		public void testPollInExecutor() {
497	–
579		final SynchronousQueue q = new SynchronousQueue();
499	–
580		ExecutorService executor = Executors.newFixedThreadPool(2);
581	+	executor.execute(new CheckedRunnable() {
582	+	public void realRun() throws InterruptedException {
583	+	assertNull(q.poll());
584	+	assertSame(one, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
585	+	assertTrue(q.isEmpty());
586	+	}});
587	+
588	+	executor.execute(new CheckedRunnable() {
589	+	public void realRun() throws InterruptedException {
590	+	Thread.sleep(SHORT_DELAY_MS);
591	+	q.put(one);
592	+	}});
593
502	–	executor.execute(new Runnable() {
503	–	public void run() {
504	–	threadAssertNull(q.poll());
505	–	try {
506	–	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
507	–	threadAssertTrue(q.isEmpty());
508	–	}
509	–	catch (InterruptedException e) {
510	–	threadUnexpectedException();
511	–	}
512	–	}
513	–	});
514	–
515	–	executor.execute(new Runnable() {
516	–	public void run() {
517	–	try {
518	–	Thread.sleep(SMALL_DELAY_MS);
519	–	q.put(new Integer(1));
520	–	}
521	–	catch (InterruptedException e) {
522	–	threadUnexpectedException();
523	–	}
524	–	}
525	–	});
526	–
594		joinPool(executor);
595	+	}
596	+
597	+	/**
598	+	* a deserialized serialized queue is usable
599	+	*/
600	+	public void testSerialization() throws Exception {
601	+	SynchronousQueue q = new SynchronousQueue();
602	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
603	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
604	+	out.writeObject(q);
605	+	out.close();
606
607	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
608	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
609	+	SynchronousQueue r = (SynchronousQueue)in.readObject();
610	+	assertEquals(q.size(), r.size());
611	+	while (!q.isEmpty())
612	+	assertEquals(q.remove(), r.remove());
613		}
614
615		/**
616	<	*
616	>	* drainTo(null) throws NPE
617		*/
618	<	public void testSerialization() {
618	>	public void testDrainToNull() {
619		SynchronousQueue q = new SynchronousQueue();
620		try {
621	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
622	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
623	<	out.writeObject(q);
624	<	out.close();
625	<
626	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
627	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
628	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
629	<	assertEquals(q.size(), r.size());
630	<	while (!q.isEmpty())
631	<	assertEquals(q.remove(), r.remove());
632	<	} catch(Exception e){
633	<	unexpectedException();
634	<	}
621	>	q.drainTo(null);
622	>	shouldThrow();
623	>	} catch (NullPointerException success) {}
624	>	}
625	>
626	>	/**
627	>	* drainTo(this) throws IAE
628	>	*/
629	>	public void testDrainToSelf() {
630	>	SynchronousQueue q = new SynchronousQueue();
631	>	try {
632	>	q.drainTo(q);
633	>	shouldThrow();
634	>	} catch (IllegalArgumentException success) {}
635	>	}
636	>
637	>	/**
638	>	* drainTo(c) of empty queue doesn't transfer elements
639	>	*/
640	>	public void testDrainTo() {
641	>	SynchronousQueue q = new SynchronousQueue();
642	>	ArrayList l = new ArrayList();
643	>	q.drainTo(l);
644	>	assertEquals(q.size(), 0);
645	>	assertEquals(l.size(), 0);
646	>	}
647	>
648	>	/**
649	>	* drainTo empties queue, unblocking a waiting put.
650	>	*/
651	>	public void testDrainToWithActivePut() throws InterruptedException {
652	>	final SynchronousQueue q = new SynchronousQueue();
653	>	Thread t = new Thread(new CheckedRunnable() {
654	>	public void realRun() throws InterruptedException {
655	>	q.put(new Integer(1));
656	>	}});
657	>
658	>	t.start();
659	>	ArrayList l = new ArrayList();
660	>	Thread.sleep(SHORT_DELAY_MS);
661	>	q.drainTo(l);
662	>	assertTrue(l.size() <= 1);
663	>	if (l.size() > 0)
664	>	assertEquals(l.get(0), new Integer(1));
665	>	t.join();
666	>	assertTrue(l.size() <= 1);
667	>	}
668	>
669	>	/**
670	>	* drainTo(null, n) throws NPE
671	>	*/
672	>	public void testDrainToNullN() {
673	>	SynchronousQueue q = new SynchronousQueue();
674	>	try {
675	>	q.drainTo(null, 0);
676	>	shouldThrow();
677	>	} catch (NullPointerException success) {}
678	>	}
679	>
680	>	/**
681	>	* drainTo(this, n) throws IAE
682	>	*/
683	>	public void testDrainToSelfN() {
684	>	SynchronousQueue q = new SynchronousQueue();
685	>	try {
686	>	q.drainTo(q, 0);
687	>	shouldThrow();
688	>	} catch (IllegalArgumentException success) {}
689	>	}
690	>
691	>	/**
692	>	* drainTo(c, n) empties up to n elements of queue into c
693	>	*/
694	>	public void testDrainToN() throws InterruptedException {
695	>	final SynchronousQueue q = new SynchronousQueue();
696	>	Thread t1 = new Thread(new CheckedRunnable() {
697	>	public void realRun() throws InterruptedException {
698	>	q.put(one);
699	>	}});
700	>
701	>	Thread t2 = new Thread(new CheckedRunnable() {
702	>	public void realRun() throws InterruptedException {
703	>	q.put(two);
704	>	}});
705	>
706	>	t1.start();
707	>	t2.start();
708	>	ArrayList l = new ArrayList();
709	>	Thread.sleep(SHORT_DELAY_MS);
710	>	q.drainTo(l, 1);
711	>	assertEquals(1, l.size());
712	>	q.drainTo(l, 1);
713	>	assertEquals(2, l.size());
714	>	assertTrue(l.contains(one));
715	>	assertTrue(l.contains(two));
716	>	t1.join();
717	>	t2.join();
718		}
719
720		}

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