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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 1.19 by jsr166, Tue Dec 1 06:03:49 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		/**
26	<	*
26	>	* A SynchronousQueue is both empty and full
27		*/
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(new Integer(3)));
33	>	assertFalse(q.offer(zero));
34		}
35
36		/**
37	<	*
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() {
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	<	*
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	>	/**
70	>	* offer fails if no active taker
71		*/
72		public void testOffer() {
73		SynchronousQueue q = new SynchronousQueue();
74	<	assertFalse(q.offer(new Integer(1)));
74	>	assertFalse(q.offer(one));
75		}
76
77		/**
78	<	*
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(new Integer(0));
85	<	} catch (IllegalStateException success){
86	<	}
84	>	q.add(one);
85	>	shouldThrow();
86	>	} catch (IllegalStateException success) {}
87		}
88
89		/**
90	<	*
90	>	* addAll(null) throws NPE
91		*/
92		public void testAddAll1() {
93		try {
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	<	*
112	>	* addAll of a collection with null elements throws NPE
113		*/
114		public void testAddAll2() {
115		try {
#	Line 82 | Line 117 | public class SynchronousQueueTest extend
117		Integer[] ints = new Integer[1];
118		q.addAll(Arrays.asList(ints));
119		shouldThrow();
120	<	}
86	<	catch (NullPointerException success) {}
120	>	} catch (NullPointerException success) {}
121		}
122		/**
123	<	*
123	>	* addAll throws ISE if no active taker
124		*/
125		public void testAddAll4() {
126		try {
#	Line 96 | Line 130 | public class SynchronousQueueTest extend
130		ints[i] = new Integer(i);
131		q.addAll(Arrays.asList(ints));
132		shouldThrow();
133	<	}
100	<	catch (IllegalStateException success) {}
133	>	} catch (IllegalStateException success) {}
134		}
135
136		/**
137	<	*
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	<	}
112	<	catch (NullPointerException success){
113	<	}
114	<	catch (InterruptedException ie) {
115	<	unexpectedException();
116	<	}
144	>	} catch (NullPointerException success) {}
145		}
146
147		/**
148	<	*
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(new Integer(0));
156	<	threadShouldThrow();
157	<	} catch (InterruptedException ie){
158	<	}
159	<	}});
160	<	t.start();
133	<	try {
134	<	Thread.sleep(SHORT_DELAY_MS);
135	<	t.interrupt();
136	<	t.join();
137	<	}
138	<	catch (InterruptedException ie) {
139	<	unexpectedException();
140	<	}
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	<	*
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;
154	<	q.put(new Object());
155	<	++added;
156	<	q.put(new Object());
157	<	++added;
158	<	q.put(new Object());
168	>	Thread t = new Thread(new CheckedRunnable() {
169	>	public void realRun() throws InterruptedException {
170	>	int added = 0;
171	>	try {
172	>	while (true) {
173	>	q.put(added);
174		++added;
160	–	threadShouldThrow();
161	–	} catch (InterruptedException e){
162	–	assertTrue(added >= 1);
175		}
176	+	} catch (InterruptedException success) {
177	+	assertTrue(added == 1);
178		}
179	<	});
180	<	try {
181	<	t.start();
182	<	Thread.sleep(SHORT_DELAY_MS);
183	<	q.take();
184	<	Thread.sleep(SHORT_DELAY_MS);
185	<	t.interrupt();
186	<	t.join();
173	<	} catch (Exception e){
174	<	unexpectedException();
175	<	}
179	>	}});
180	>
181	>	t.start();
182	>	Thread.sleep(SHORT_DELAY_MS);
183	>	assertEquals(0, q.take());
184	>	Thread.sleep(SHORT_DELAY_MS);
185	>	t.interrupt();
186	>	t.join();
187		}
188
189		/**
190	<	*
190	>	* timed offer times out if elements not taken
191		*/
192	<	public void testTimedOffer() {
192	>	public void testTimedOffer() throws InterruptedException {
193		final SynchronousQueue q = new SynchronousQueue();
194	<	Thread t = new Thread(new Runnable() {
195	<	public void run() {
196	<	try {
197	<
198	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
199	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
200	<	threadShouldThrow();
201	<	} catch (InterruptedException success){}
202	<	}
203	<	});
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	<	}
194	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
195	>	public void realRun() throws InterruptedException {
196	>	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
197	>	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
198	>	}});
199	>
200	>	t.start();
201	>	Thread.sleep(SMALL_DELAY_MS);
202	>	t.interrupt();
203	>	t.join();
204		}
205
206
207		/**
208	<	*
208	>	* take blocks interruptibly when empty
209		*/
210	<	public void testTakeFromEmpty() {
210	>	public void testTakeFromEmpty() throws InterruptedException {
211		final SynchronousQueue q = new SynchronousQueue();
212	<	Thread t = new Thread(new Runnable() {
213	<	public void run() {
214	<	try {
215	<	q.take();
216	<	threadShouldThrow();
217	<	} catch (InterruptedException success){ }
212	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
213	>	public void realRun() throws InterruptedException {
214	>	q.take();
215	>	}});
216	>
217	>	t.start();
218	>	Thread.sleep(SHORT_DELAY_MS);
219	>	t.interrupt();
220	>	t.join();
221	>	}
222	>
223	>
224	>	/**
225	>	* put blocks interruptibly if no active taker
226	>	*/
227	>	public void testFairBlockingPut() throws InterruptedException {
228	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
229	>	public void realRun() throws InterruptedException {
230	>	SynchronousQueue q = new SynchronousQueue(true);
231	>	q.put(zero);
232	>	}});
233	>
234	>	t.start();
235	>	Thread.sleep(SHORT_DELAY_MS);
236	>	t.interrupt();
237	>	t.join();
238	>	}
239	>
240	>	/**
241	>	* put blocks waiting for take
242	>	*/
243	>	public void testFairPutWithTake() throws InterruptedException {
244	>	final SynchronousQueue q = new SynchronousQueue(true);
245	>	Thread t = new Thread(new CheckedRunnable() {
246	>	public void realRun() throws InterruptedException {
247	>	int added = 0;
248	>	try {
249	>	while (true) {
250	>	q.put(added);
251	>	++added;
252	>	}
253	>	} catch (InterruptedException success) {
254	>	assertTrue(added == 1);
255		}
256	<	});
257	<	try {
258	<	t.start();
259	<	Thread.sleep(SHORT_DELAY_MS);
260	<	t.interrupt();
261	<	t.join();
262	<	} catch (Exception e){
263	<	unexpectedException();
264	<	}
256	>	}});
257	>
258	>	t.start();
259	>	Thread.sleep(SHORT_DELAY_MS);
260	>	assertEquals(0, q.take());
261	>	Thread.sleep(SHORT_DELAY_MS);
262	>	t.interrupt();
263	>	t.join();
264	>	}
265	>
266	>	/**
267	>	* timed offer times out if elements not taken
268	>	*/
269	>	public void testFairTimedOffer() throws InterruptedException {
270	>	final SynchronousQueue q = new SynchronousQueue(true);
271	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
272	>	public void realRun() throws InterruptedException {
273	>	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
274	>	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
275	>	}});
276	>
277	>	t.start();
278	>	Thread.sleep(SMALL_DELAY_MS);
279	>	t.interrupt();
280	>	t.join();
281		}
282
283	+
284		/**
285	<	*
285	>	* take blocks interruptibly when empty
286	>	*/
287	>	public void testFairTakeFromEmpty() throws InterruptedException {
288	>	final SynchronousQueue q = new SynchronousQueue(true);
289	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
290	>	public void realRun() throws InterruptedException {
291	>	q.take();
292	>	}});
293	>
294	>	t.start();
295	>	Thread.sleep(SHORT_DELAY_MS);
296	>	t.interrupt();
297	>	t.join();
298	>	}
299	>
300	>	/**
301	>	* poll fails unless active taker
302		*/
303		public void testPoll() {
304		SynchronousQueue q = new SynchronousQueue();
305	<	assertNull(q.poll());
305	>	assertNull(q.poll());
306		}
307
308		/**
309	<	*
309	>	* timed pool with zero timeout times out if no active taker
310		*/
311	<	public void testTimedPoll0() {
312	<	try {
313	<	SynchronousQueue q = new SynchronousQueue();
242	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
243	<	} catch (InterruptedException e){
244	<	unexpectedException();
245	<	}
311	>	public void testTimedPoll0() throws InterruptedException {
312	>	SynchronousQueue q = new SynchronousQueue();
313	>	assertNull(q.poll(0, MILLISECONDS));
314		}
315
316		/**
317	<	*
317	>	* timed pool with nonzero timeout times out if no active taker
318		*/
319	<	public void testTimedPoll() {
320	<	try {
321	<	SynchronousQueue q = new SynchronousQueue();
254	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
255	<	} catch (InterruptedException e){
256	<	unexpectedException();
257	<	}
319	>	public void testTimedPoll() throws InterruptedException {
320	>	SynchronousQueue q = new SynchronousQueue();
321	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
322		}
323
324		/**
325	<	*
325	>	* Interrupted timed poll throws InterruptedException instead of
326	>	* returning timeout status
327		*/
328	<	public void testInterruptedTimedPoll() {
329	<	Thread t = new Thread(new Runnable() {
330	<	public void run() {
331	<	try {
332	<	SynchronousQueue q = new SynchronousQueue();
333	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
334	<	} catch (InterruptedException success){
270	<	}
271	<	}});
328	>	public void testInterruptedTimedPoll() throws InterruptedException {
329	>	final SynchronousQueue q = new SynchronousQueue();
330	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
331	>	public void realRun() throws InterruptedException {
332	>	q.poll(SMALL_DELAY_MS, MILLISECONDS);
333	>	}});
334	>
335		t.start();
336	<	try {
337	<	Thread.sleep(SHORT_DELAY_MS);
338	<	t.interrupt();
276	<	t.join();
277	<	}
278	<	catch (InterruptedException ie) {
279	<	unexpectedException();
280	<	}
336	>	Thread.sleep(SHORT_DELAY_MS);
337	>	t.interrupt();
338	>	t.join();
339		}
340
341		/**
342	<	*
342	>	*  timed poll before a delayed offer fails; after offer succeeds;
343	>	*  on interruption throws
344		*/
345	<	public void testTimedPollWithOffer() {
345	>	public void testTimedPollWithOffer() throws InterruptedException {
346		final SynchronousQueue q = new SynchronousQueue();
347	<	Thread t = new Thread(new Runnable() {
348	<	public void run() {
349	<	try {
350	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
351	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
352	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
353	<	threadShouldThrow();
354	<	} catch (InterruptedException success) { }
355	<	}
356	<	});
357	<	try {
358	<	t.start();
359	<	Thread.sleep(SMALL_DELAY_MS);
360	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
361	<	t.interrupt();
362	<	t.join();
304	<	} catch (Exception e){
305	<	unexpectedException();
306	<	}
307	<	}
347	>	Thread t = new Thread(new CheckedRunnable() {
348	>	public void realRun() throws InterruptedException {
349	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
350	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
351	>	try {
352	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
353	>	shouldThrow();
354	>	} catch (InterruptedException success) {}
355	>	}});
356	>
357	>	t.start();
358	>	Thread.sleep(SMALL_DELAY_MS);
359	>	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
360	>	t.interrupt();
361	>	t.join();
362	>	}
363
364	+	/**
365	+	* Interrupted timed poll throws InterruptedException instead of
366	+	* returning timeout status
367	+	*/
368	+	public void testFairInterruptedTimedPoll() throws InterruptedException {
369	+	Thread t = new Thread(new CheckedInterruptedRunnable() {
370	+	public void realRun() throws InterruptedException {
371	+	SynchronousQueue q = new SynchronousQueue(true);
372	+	q.poll(SMALL_DELAY_MS, MILLISECONDS);
373	+	}});
374	+
375	+	t.start();
376	+	Thread.sleep(SHORT_DELAY_MS);
377	+	t.interrupt();
378	+	t.join();
379	+	}
380
381		/**
382	<	*
382	>	*  timed poll before a delayed offer fails; after offer succeeds;
383	>	*  on interruption throws
384	>	*/
385	>	public void testFairTimedPollWithOffer() throws InterruptedException {
386	>	final SynchronousQueue q = new SynchronousQueue(true);
387	>	Thread t = new Thread(new CheckedRunnable() {
388	>	public void realRun() throws InterruptedException {
389	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
390	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
391	>	try {
392	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
393	>	threadShouldThrow();
394	>	} catch (InterruptedException success) {}
395	>	}});
396	>
397	>	t.start();
398	>	Thread.sleep(SMALL_DELAY_MS);
399	>	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
400	>	t.interrupt();
401	>	t.join();
402	>	}
403	>
404	>
405	>	/**
406	>	* peek returns null
407		*/
408		public void testPeek() {
409		SynchronousQueue q = new SynchronousQueue();
410	<	assertNull(q.peek());
410	>	assertNull(q.peek());
411		}
412
413		/**
414	<	*
414	>	* element throws NSEE
415		*/
416		public void testElement() {
417		SynchronousQueue q = new SynchronousQueue();
418		try {
419		q.element();
420		shouldThrow();
421	<	}
327	<	catch (NoSuchElementException success) {}
421	>	} catch (NoSuchElementException success) {}
422		}
423
424		/**
425	<	*
425	>	* remove throws NSEE if no active taker
426		*/
427		public void testRemove() {
428		SynchronousQueue q = new SynchronousQueue();
429		try {
430		q.remove();
431		shouldThrow();
432	<	} catch (NoSuchElementException success){
339	<	}
432	>	} catch (NoSuchElementException success) {}
433		}
434
435		/**
436	<	*
436	>	* remove(x) returns false
437		*/
438		public void testRemoveElement() {
439		SynchronousQueue q = new SynchronousQueue();
440	<	assertFalse(q.remove(new Integer(0)));
440	>	assertFalse(q.remove(zero));
441		assertTrue(q.isEmpty());
442		}
443	<
443	>
444		/**
445	<	*
445	>	* contains returns false
446		*/
447		public void testContains() {
448		SynchronousQueue q = new SynchronousQueue();
449	<	assertFalse(q.contains(new Integer(0)));
449	>	assertFalse(q.contains(zero));
450		}
451
452		/**
453	<	*
453	>	* clear ensures isEmpty
454		*/
455		public void testClear() {
456		SynchronousQueue q = new SynchronousQueue();
#	Line 366 | Line 459 | public class SynchronousQueueTest extend
459		}
460
461		/**
462	<	*
462	>	* containsAll returns false unless empty
463		*/
464		public void testContainsAll() {
465		SynchronousQueue q = new SynchronousQueue();
466		Integer[] empty = new Integer[0];
467	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
467	>	assertTrue(q.containsAll(Arrays.asList(empty)));
468	>	Integer[] ints = new Integer[1]; ints[0] = zero;
469		assertFalse(q.containsAll(Arrays.asList(ints)));
470		}
471
472		/**
473	<	*
473	>	* retainAll returns false
474		*/
475		public void testRetainAll() {
476		SynchronousQueue q = new SynchronousQueue();
477		Integer[] empty = new Integer[0];
478	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
479	<	q.retainAll(Arrays.asList(ints));
480	<	assertFalse(q.containsAll(Arrays.asList(ints)));
478	>	assertFalse(q.retainAll(Arrays.asList(empty)));
479	>	Integer[] ints = new Integer[1]; ints[0] = zero;
480	>	assertFalse(q.retainAll(Arrays.asList(ints)));
481		}
482
483		/**
484	<	*
484	>	* removeAll returns false
485		*/
486		public void testRemoveAll() {
487		SynchronousQueue q = new SynchronousQueue();
488		Integer[] empty = new Integer[0];
489	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
490	<	q.removeAll(Arrays.asList(ints));
489	>	assertFalse(q.removeAll(Arrays.asList(empty)));
490	>	Integer[] ints = new Integer[1]; ints[0] = zero;
491		assertFalse(q.containsAll(Arrays.asList(ints)));
492		}
493
494
495		/**
496	<	*
496	>	* toArray is empty
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
504		/**
505	<	*
505	>	* toArray(a) is nulled at position 0
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	<
512	>
513	>	/**
514	>	* toArray(null) throws NPE
515	>	*/
516	>	public void testToArray_BadArg() {
517	>	SynchronousQueue q = new SynchronousQueue();
518	>	try {
519	>	Object o[] = q.toArray(null);
520	>	shouldThrow();
521	>	} catch (NullPointerException success) {}
522	>	}
523	>
524	>
525		/**
526	<	*
526	>	* iterator does not traverse any elements
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();
534		shouldThrow();
535	<	}
430	<	catch (NoSuchElementException success) {}
535	>	} catch (NoSuchElementException success) {}
536		}
537
538		/**
539	<	*
539	>	* iterator remove throws ISE
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();
547	<	}
443	<	catch (IllegalStateException success) {}
547	>	} catch (IllegalStateException success) {}
548		}
549
550		/**
551	<	*
551	>	* toString returns a non-null string
552		*/
553		public void testToString() {
554		SynchronousQueue q = new SynchronousQueue();
555		String s = q.toString();
556	<	assertTrue(s != null);
557	<	}
556	>	assertNotNull(s);
557	>	}
558
559
560		/**
561	<	*
561	>	* offer transfers elements across Executor tasks
562		*/
563		public void testOfferInExecutor() {
564		final SynchronousQueue q = new SynchronousQueue();
565		ExecutorService executor = Executors.newFixedThreadPool(2);
462	–	final Integer one = new Integer(1);
566
567	<	executor.execute(new Runnable() {
568	<	public void run() {
569	<	threadAssertFalse(q.offer(one));
570	<	try {
571	<	threadAssertTrue(q.offer(one, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
572	<	threadAssertEquals(0, q.remainingCapacity());
573	<	}
574	<	catch (InterruptedException e) {
575	<	threadUnexpectedException();
576	<	}
577	<	}
578	<	});
567	>	executor.execute(new CheckedRunnable() {
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 {
576	>	Thread.sleep(SMALL_DELAY_MS);
577	>	assertSame(one, q.take());
578	>	}});
579
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	–
580		joinPool(executor);
581
582		}
583
584		/**
585	<	*
585	>	* poll retrieves elements across Executor threads
586		*/
587		public void testPollInExecutor() {
497	–
588		final SynchronousQueue q = new SynchronousQueue();
499	–
589		ExecutorService executor = Executors.newFixedThreadPool(2);
590	+	executor.execute(new CheckedRunnable() {
591	+	public void realRun() throws InterruptedException {
592	+	assertNull(q.poll());
593	+	assertSame(one, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
594	+	assertTrue(q.isEmpty());
595	+	}});
596	+
597	+	executor.execute(new CheckedRunnable() {
598	+	public void realRun() throws InterruptedException {
599	+	Thread.sleep(SHORT_DELAY_MS);
600	+	q.put(one);
601	+	}});
602
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	–
603		joinPool(executor);
604	+	}
605
606	+	/**
607	+	* a deserialized serialized queue is usable
608	+	*/
609	+	public void testSerialization() throws Exception {
610	+	SynchronousQueue q = new SynchronousQueue();
611	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
612	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
613	+	out.writeObject(q);
614	+	out.close();
615	+
616	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
617	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
618	+	SynchronousQueue r = (SynchronousQueue)in.readObject();
619	+	assertEquals(q.size(), r.size());
620	+	while (!q.isEmpty())
621	+	assertEquals(q.remove(), r.remove());
622		}
623
624		/**
625	<	*
625	>	* drainTo(null) throws NPE
626		*/
627	<	public void testSerialization() {
627	>	public void testDrainToNull() {
628		SynchronousQueue q = new SynchronousQueue();
629		try {
630	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
631	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
632	<	out.writeObject(q);
633	<	out.close();
634	<
635	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
636	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
637	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
638	<	assertEquals(q.size(), r.size());
639	<	while (!q.isEmpty())
640	<	assertEquals(q.remove(), r.remove());
641	<	} catch(Exception e){
642	<	unexpectedException();
643	<	}
630	>	q.drainTo(null);
631	>	shouldThrow();
632	>	} catch (NullPointerException success) {}
633	>	}
634	>
635	>	/**
636	>	* drainTo(this) throws IAE
637	>	*/
638	>	public void testDrainToSelf() {
639	>	SynchronousQueue q = new SynchronousQueue();
640	>	try {
641	>	q.drainTo(q);
642	>	shouldThrow();
643	>	} catch (IllegalArgumentException success) {}
644	>	}
645	>
646	>	/**
647	>	* drainTo(c) of empty queue doesn't transfer elements
648	>	*/
649	>	public void testDrainTo() {
650	>	SynchronousQueue q = new SynchronousQueue();
651	>	ArrayList l = new ArrayList();
652	>	q.drainTo(l);
653	>	assertEquals(q.size(), 0);
654	>	assertEquals(l.size(), 0);
655	>	}
656	>
657	>	/**
658	>	* drainTo empties queue, unblocking a waiting put.
659	>	*/
660	>	public void testDrainToWithActivePut() throws InterruptedException {
661	>	final SynchronousQueue q = new SynchronousQueue();
662	>	Thread t = new Thread(new CheckedRunnable() {
663	>	public void realRun() throws InterruptedException {
664	>	q.put(new Integer(1));
665	>	}});
666	>
667	>	t.start();
668	>	ArrayList l = new ArrayList();
669	>	Thread.sleep(SHORT_DELAY_MS);
670	>	q.drainTo(l);
671	>	assertTrue(l.size() <= 1);
672	>	if (l.size() > 0)
673	>	assertEquals(l.get(0), new Integer(1));
674	>	t.join();
675	>	assertTrue(l.size() <= 1);
676	>	}
677	>
678	>	/**
679	>	* drainTo(null, n) throws NPE
680	>	*/
681	>	public void testDrainToNullN() {
682	>	SynchronousQueue q = new SynchronousQueue();
683	>	try {
684	>	q.drainTo(null, 0);
685	>	shouldThrow();
686	>	} catch (NullPointerException success) {}
687	>	}
688	>
689	>	/**
690	>	* drainTo(this, n) throws IAE
691	>	*/
692	>	public void testDrainToSelfN() {
693	>	SynchronousQueue q = new SynchronousQueue();
694	>	try {
695	>	q.drainTo(q, 0);
696	>	shouldThrow();
697	>	} catch (IllegalArgumentException success) {}
698	>	}
699	>
700	>	/**
701	>	* drainTo(c, n) empties up to n elements of queue into c
702	>	*/
703	>	public void testDrainToN() throws InterruptedException {
704	>	final SynchronousQueue q = new SynchronousQueue();
705	>	Thread t1 = new Thread(new CheckedRunnable() {
706	>	public void realRun() throws InterruptedException {
707	>	q.put(one);
708	>	}});
709	>
710	>	Thread t2 = new Thread(new CheckedRunnable() {
711	>	public void realRun() throws InterruptedException {
712	>	q.put(two);
713	>	}});
714	>
715	>	t1.start();
716	>	t2.start();
717	>	ArrayList l = new ArrayList();
718	>	Thread.sleep(SHORT_DELAY_MS);
719	>	q.drainTo(l, 1);
720	>	assertTrue(l.size() == 1);
721	>	q.drainTo(l, 1);
722	>	assertTrue(l.size() == 2);
723	>	assertTrue(l.contains(one));
724	>	assertTrue(l.contains(two));
725	>	t1.join();
726	>	t2.join();
727		}
728
729		}

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