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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 1.14 by jsr166, Sat Nov 21 02:07:27 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	<	}
74	<	catch (NullPointerException success) {}
97	>	} catch (NullPointerException success) {}
98		}
99	+
100		/**
101	<	*
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		*/
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;
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);
163	<	}
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();
173	<	} catch (Exception e){
174	<	unexpectedException();
175	<	}
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	<	*
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	<	});
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	<	}
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	<	*
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		/**
311	<	*
311	>	* poll fails unless active taker
312		*/
313		public void testPoll() {
314		SynchronousQueue q = new SynchronousQueue();
315	<	assertNull(q.poll());
315	>	assertNull(q.poll());
316		}
317
318		/**
319	<	*
319	>	* timed pool with zero timeout times out if no active taker
320		*/
321	<	public void testTimedPoll0() {
322	<	try {
323	<	SynchronousQueue q = new SynchronousQueue();
242	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
243	<	} catch (InterruptedException e){
244	<	unexpectedException();
245	<	}
321	>	public void testTimedPoll0() throws InterruptedException {
322	>	SynchronousQueue q = new SynchronousQueue();
323	>	assertNull(q.poll(0, MILLISECONDS));
324		}
325
326		/**
327	<	*
327	>	* timed pool with nonzero timeout times out if no active taker
328		*/
329	<	public void testTimedPoll() {
330	<	try {
331	<	SynchronousQueue q = new SynchronousQueue();
254	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
255	<	} catch (InterruptedException e){
256	<	unexpectedException();
257	<	}
329	>	public void testTimedPoll() throws InterruptedException {
330	>	SynchronousQueue q = new SynchronousQueue();
331	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
332		}
333
334		/**
335	<	*
336	<	*/
337	<	public void testInterruptedTimedPoll() {
338	<	Thread t = new Thread(new Runnable() {
339	<	public void run() {
340	<	try {
341	<	SynchronousQueue q = new SynchronousQueue();
342	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
343	<	} catch (InterruptedException success){
344	<	}
345	<	}});
346	<	t.start();
347	<	try {
348	<	Thread.sleep(SHORT_DELAY_MS);
275	<	t.interrupt();
276	<	t.join();
277	<	}
278	<	catch (InterruptedException ie) {
279	<	unexpectedException();
280	<	}
335	>	* Interrupted timed poll throws InterruptedException instead of
336	>	* returning timeout status
337	>	*/
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	<	*
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(new Integer(0), 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	<	*
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	>	/**
416	>	* peek returns null
417		*/
418		public void testPeek() {
419		SynchronousQueue q = new SynchronousQueue();
420	<	assertNull(q.peek());
420	>	assertNull(q.peek());
421		}
422
423		/**
424	<	*
424	>	* element throws NSEE
425		*/
426		public void testElement() {
427		SynchronousQueue q = new SynchronousQueue();
428		try {
429		q.element();
430		shouldThrow();
431	<	}
327	<	catch (NoSuchElementException success) {}
431	>	} catch (NoSuchElementException success) {}
432		}
433
434		/**
435	<	*
435	>	* remove throws NSEE if no active taker
436		*/
437		public void testRemove() {
438		SynchronousQueue q = new SynchronousQueue();
439		try {
440		q.remove();
441		shouldThrow();
442	<	} catch (NoSuchElementException success){
443	<	}
442	>	} catch (NoSuchElementException success) {
443	>	}
444		}
445
446		/**
447	<	*
447	>	* remove(x) returns false
448		*/
449		public void testRemoveElement() {
450		SynchronousQueue q = new SynchronousQueue();
451	<	assertFalse(q.remove(new Integer(0)));
451	>	assertFalse(q.remove(zero));
452		assertTrue(q.isEmpty());
453		}
454	<
454	>
455		/**
456	<	*
456	>	* contains returns false
457		*/
458		public void testContains() {
459		SynchronousQueue q = new SynchronousQueue();
460	<	assertFalse(q.contains(new Integer(0)));
460	>	assertFalse(q.contains(zero));
461		}
462
463		/**
464	<	*
464	>	* clear ensures isEmpty
465		*/
466		public void testClear() {
467		SynchronousQueue q = new SynchronousQueue();
#	Line 366 | Line 470 | public class SynchronousQueueTest extend
470		}
471
472		/**
473	<	*
473	>	* containsAll returns false unless empty
474		*/
475		public void testContainsAll() {
476		SynchronousQueue q = new SynchronousQueue();
477		Integer[] empty = new Integer[0];
478	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
478	>	assertTrue(q.containsAll(Arrays.asList(empty)));
479	>	Integer[] ints = new Integer[1]; ints[0] = zero;
480		assertFalse(q.containsAll(Arrays.asList(ints)));
481		}
482
483		/**
484	<	*
484	>	* retainAll returns false
485		*/
486		public void testRetainAll() {
487		SynchronousQueue q = new SynchronousQueue();
488		Integer[] empty = new Integer[0];
489	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
490	<	q.retainAll(Arrays.asList(ints));
491	<	assertFalse(q.containsAll(Arrays.asList(ints)));
489	>	assertFalse(q.retainAll(Arrays.asList(empty)));
490	>	Integer[] ints = new Integer[1]; ints[0] = zero;
491	>	assertFalse(q.retainAll(Arrays.asList(ints)));
492		}
493
494		/**
495	<	*
495	>	* removeAll returns false
496		*/
497		public void testRemoveAll() {
498		SynchronousQueue q = new SynchronousQueue();
499		Integer[] empty = new Integer[0];
500	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
501	<	q.removeAll(Arrays.asList(ints));
500	>	assertFalse(q.removeAll(Arrays.asList(empty)));
501	>	Integer[] ints = new Integer[1]; ints[0] = zero;
502		assertFalse(q.containsAll(Arrays.asList(ints)));
503		}
504
505
506		/**
507	<	*
507	>	* toArray is empty
508		*/
509		public void testToArray() {
510		SynchronousQueue q = new SynchronousQueue();
511	<	Object[] o = q.toArray();
511	>	Object[] o = q.toArray();
512		assertEquals(o.length, 0);
513		}
514
515		/**
516	<	*
516	>	* toArray(a) is nulled at position 0
517		*/
518		public void testToArray2() {
519		SynchronousQueue q = new SynchronousQueue();
520	<	Integer[] ints = new Integer[1];
520	>	Integer[] ints = new Integer[1];
521		assertNull(ints[0]);
522		}
523	<
523	>
524		/**
525	<	*
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		*/
539		public void testIterator() {
540		SynchronousQueue q = new SynchronousQueue();
541	<	Iterator it = q.iterator();
541	>	Iterator it = q.iterator();
542		assertFalse(it.hasNext());
543		try {
544		Object x = it.next();
545		shouldThrow();
546	<	}
430	<	catch (NoSuchElementException success) {}
546	>	} catch (NoSuchElementException success) {}
547		}
548
549		/**
550	<	*
550	>	* iterator remove throws ISE
551		*/
552		public void testIteratorRemove() {
553		SynchronousQueue q = new SynchronousQueue();
554	<	Iterator it = q.iterator();
554	>	Iterator it = q.iterator();
555		try {
556		it.remove();
557		shouldThrow();
558	<	}
443	<	catch (IllegalStateException success) {}
558	>	} catch (IllegalStateException success) {}
559		}
560
561		/**
562	<	*
562	>	* toString returns a non-null string
563		*/
564		public void testToString() {
565		SynchronousQueue q = new SynchronousQueue();
566		String s = q.toString();
567	<	assertTrue(s != null);
568	<	}
567	>	assertNotNull(s);
568	>	}
569
570
571		/**
572	<	*
572	>	* offer transfers elements across Executor tasks
573		*/
574		public void testOfferInExecutor() {
575		final SynchronousQueue q = new SynchronousQueue();
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
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	–
592		joinPool(executor);
593
594		}
595
596		/**
597	<	*
597	>	* poll retrieves elements across Executor threads
598		*/
599		public void testPollInExecutor() {
497	–
600		final SynchronousQueue q = new SynchronousQueue();
499	–
601		ExecutorService executor = Executors.newFixedThreadPool(2);
602	<
603	<	executor.execute(new Runnable() {
503	<	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
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	–
615		joinPool(executor);
616	+	}
617	+
618	+	/**
619	+	* a deserialized serialized queue is usable
620	+	*/
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	<	*
702	>	* drainTo(this, n) throws IAE
703		*/
704	<	public void testSerialization() {
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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