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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 1.23 by jsr166, Thu Sep 16 00:52:49 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 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		/**
124	<	*
124	>	* addAll throws ISE if no active taker
125		*/
126		public void testAddAll4() {
127		try {
#	Line 96 | Line 131 | public class SynchronousQueueTest extend
131		ints[i] = new Integer(i);
132		q.addAll(Arrays.asList(ints));
133		shouldThrow();
134	<	}
100	<	catch (IllegalStateException success) {}
134	>	} catch (IllegalStateException success) {}
135		}
136
137		/**
138	<	*
138	>	* put(null) throws NPE
139		*/
140	<	public void testPutNull() {
141	<	try {
140	>	public void testPutNull() throws InterruptedException {
141	>	try {
142		SynchronousQueue q = new SynchronousQueue();
143		q.put(null);
144		shouldThrow();
145	<	}
112	<	catch (NullPointerException success){
113	<	}
114	<	catch (InterruptedException ie) {
115	<	unexpectedException();
116	<	}
145	>	} catch (NullPointerException success) {}
146		}
147
148		/**
149	<	*
149	>	* put blocks interruptibly if no active taker
150		*/
151	<	public void testBlockingPut() {
152	<	Thread t = new Thread(new Runnable() {
153	<	public void run() {
154	<	try {
155	<	SynchronousQueue q = new SynchronousQueue();
156	<	q.put(new Integer(0));
157	<	threadShouldThrow();
158	<	} catch (InterruptedException ie){
159	<	}
160	<	}});
161	<	t.start();
133	<	try {
134	<	Thread.sleep(SHORT_DELAY_MS);
135	<	t.interrupt();
136	<	t.join();
137	<	}
138	<	catch (InterruptedException ie) {
139	<	unexpectedException();
140	<	}
151	>	public void testBlockingPut() throws InterruptedException {
152	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
153	>	public void realRun() throws InterruptedException {
154	>	SynchronousQueue q = new SynchronousQueue();
155	>	q.put(zero);
156	>	}});
157	>
158	>	t.start();
159	>	Thread.sleep(SHORT_DELAY_MS);
160	>	t.interrupt();
161	>	t.join();
162		}
163
164		/**
165	<	*
165	>	* put blocks waiting for take
166		*/
167	<	public void testPutWithTake() {
167	>	public void testPutWithTake() throws InterruptedException {
168		final SynchronousQueue q = new SynchronousQueue();
169	<	Thread t = new Thread(new Runnable() {
170	<	public void run() {
171	<	int added = 0;
172	<	try {
173	<	q.put(new Object());
174	<	++added;
154	<	q.put(new Object());
155	<	++added;
156	<	q.put(new Object());
157	<	++added;
158	<	q.put(new Object());
169	>	Thread t = new Thread(new CheckedRunnable() {
170	>	public void realRun() throws InterruptedException {
171	>	int added = 0;
172	>	try {
173	>	while (true) {
174	>	q.put(added);
175		++added;
160	–	threadShouldThrow();
161	–	} catch (InterruptedException e){
162	–	assertTrue(added >= 1);
176		}
177	+	} catch (InterruptedException success) {
178	+	assertEquals(1, added);
179		}
180	<	});
181	<	try {
182	<	t.start();
183	<	Thread.sleep(SHORT_DELAY_MS);
184	<	q.take();
185	<	Thread.sleep(SHORT_DELAY_MS);
186	<	t.interrupt();
187	<	t.join();
173	<	} catch (Exception e){
174	<	unexpectedException();
175	<	}
180	>	}});
181	>
182	>	t.start();
183	>	Thread.sleep(SHORT_DELAY_MS);
184	>	assertEquals(0, q.take());
185	>	Thread.sleep(SHORT_DELAY_MS);
186	>	t.interrupt();
187	>	t.join();
188		}
189
190		/**
191	<	*
191	>	* timed offer times out if elements not taken
192		*/
193	<	public void testTimedOffer() {
193	>	public void testTimedOffer() throws InterruptedException {
194		final SynchronousQueue q = new SynchronousQueue();
195	<	Thread t = new Thread(new Runnable() {
196	<	public void run() {
197	<	try {
198	<
199	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
200	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
201	<	threadShouldThrow();
202	<	} catch (InterruptedException success){}
203	<	}
204	<	});
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	<	}
195	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
196	>	public void realRun() throws InterruptedException {
197	>	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
198	>	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
199	>	}});
200	>
201	>	t.start();
202	>	Thread.sleep(SMALL_DELAY_MS);
203	>	t.interrupt();
204	>	t.join();
205		}
206
207
208		/**
209	<	*
209	>	* take blocks interruptibly when empty
210		*/
211	<	public void testTakeFromEmpty() {
211	>	public void testTakeFromEmpty() throws InterruptedException {
212		final SynchronousQueue q = new SynchronousQueue();
213	<	Thread t = new Thread(new Runnable() {
214	<	public void run() {
215	<	try {
216	<	q.take();
217	<	threadShouldThrow();
218	<	} catch (InterruptedException success){ }
213	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
214	>	public void realRun() throws InterruptedException {
215	>	q.take();
216	>	}});
217	>
218	>	t.start();
219	>	Thread.sleep(SHORT_DELAY_MS);
220	>	t.interrupt();
221	>	t.join();
222	>	}
223	>
224	>
225	>	/**
226	>	* put blocks interruptibly if no active taker
227	>	*/
228	>	public void testFairBlockingPut() throws InterruptedException {
229	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
230	>	public void realRun() throws InterruptedException {
231	>	SynchronousQueue q = new SynchronousQueue(true);
232	>	q.put(zero);
233	>	}});
234	>
235	>	t.start();
236	>	Thread.sleep(SHORT_DELAY_MS);
237	>	t.interrupt();
238	>	t.join();
239	>	}
240	>
241	>	/**
242	>	* put blocks waiting for take
243	>	*/
244	>	public void testFairPutWithTake() throws InterruptedException {
245	>	final SynchronousQueue q = new SynchronousQueue(true);
246	>	Thread t = new Thread(new CheckedRunnable() {
247	>	public void realRun() throws InterruptedException {
248	>	int added = 0;
249	>	try {
250	>	while (true) {
251	>	q.put(added);
252	>	++added;
253	>	}
254	>	} catch (InterruptedException success) {
255	>	assertEquals(1, added);
256		}
257	<	});
258	<	try {
259	<	t.start();
260	<	Thread.sleep(SHORT_DELAY_MS);
261	<	t.interrupt();
262	<	t.join();
263	<	} catch (Exception e){
264	<	unexpectedException();
265	<	}
257	>	}});
258	>
259	>	t.start();
260	>	Thread.sleep(SHORT_DELAY_MS);
261	>	assertEquals(0, q.take());
262	>	Thread.sleep(SHORT_DELAY_MS);
263	>	t.interrupt();
264	>	t.join();
265	>	}
266	>
267	>	/**
268	>	* timed offer times out if elements not taken
269	>	*/
270	>	public void testFairTimedOffer() throws InterruptedException {
271	>	final SynchronousQueue q = new SynchronousQueue(true);
272	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
273	>	public void realRun() throws InterruptedException {
274	>	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
275	>	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
276	>	}});
277	>
278	>	t.start();
279	>	Thread.sleep(SMALL_DELAY_MS);
280	>	t.interrupt();
281	>	t.join();
282		}
283
284	+
285		/**
286	<	*
286	>	* take blocks interruptibly when empty
287	>	*/
288	>	public void testFairTakeFromEmpty() throws InterruptedException {
289	>	final SynchronousQueue q = new SynchronousQueue(true);
290	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
291	>	public void realRun() throws InterruptedException {
292	>	q.take();
293	>	}});
294	>
295	>	t.start();
296	>	Thread.sleep(SHORT_DELAY_MS);
297	>	t.interrupt();
298	>	t.join();
299	>	}
300	>
301	>	/**
302	>	* poll fails unless active taker
303		*/
304		public void testPoll() {
305		SynchronousQueue q = new SynchronousQueue();
306	<	assertNull(q.poll());
306	>	assertNull(q.poll());
307		}
308
309		/**
310	<	*
310	>	* timed pool with zero timeout times out if no active taker
311		*/
312	<	public void testTimedPoll0() {
313	<	try {
314	<	SynchronousQueue q = new SynchronousQueue();
242	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
243	<	} catch (InterruptedException e){
244	<	unexpectedException();
245	<	}
312	>	public void testTimedPoll0() throws InterruptedException {
313	>	SynchronousQueue q = new SynchronousQueue();
314	>	assertNull(q.poll(0, MILLISECONDS));
315		}
316
317		/**
318	<	*
318	>	* timed pool with nonzero timeout times out if no active taker
319		*/
320	<	public void testTimedPoll() {
321	<	try {
322	<	SynchronousQueue q = new SynchronousQueue();
254	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
255	<	} catch (InterruptedException e){
256	<	unexpectedException();
257	<	}
320	>	public void testTimedPoll() throws InterruptedException {
321	>	SynchronousQueue q = new SynchronousQueue();
322	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
323		}
324
325		/**
326	<	*
326	>	* Interrupted timed poll throws InterruptedException instead of
327	>	* returning timeout status
328		*/
329	<	public void testInterruptedTimedPoll() {
330	<	Thread t = new Thread(new Runnable() {
331	<	public void run() {
332	<	try {
333	<	SynchronousQueue q = new SynchronousQueue();
334	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
335	<	} catch (InterruptedException success){
270	<	}
271	<	}});
329	>	public void testInterruptedTimedPoll() throws InterruptedException {
330	>	final SynchronousQueue q = new SynchronousQueue();
331	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
332	>	public void realRun() throws InterruptedException {
333	>	q.poll(SMALL_DELAY_MS, MILLISECONDS);
334	>	}});
335	>
336		t.start();
337	<	try {
338	<	Thread.sleep(SHORT_DELAY_MS);
339	<	t.interrupt();
276	<	t.join();
277	<	}
278	<	catch (InterruptedException ie) {
279	<	unexpectedException();
280	<	}
337	>	Thread.sleep(SHORT_DELAY_MS);
338	>	t.interrupt();
339	>	t.join();
340		}
341
342		/**
343	<	*
343	>	*  timed poll before a delayed offer fails; after offer succeeds;
344	>	*  on interruption throws
345		*/
346	<	public void testTimedPollWithOffer() {
346	>	public void testTimedPollWithOffer() throws InterruptedException {
347		final SynchronousQueue q = new SynchronousQueue();
348	<	Thread t = new Thread(new Runnable() {
349	<	public void run() {
350	<	try {
351	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
352	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
353	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
354	<	threadShouldThrow();
355	<	} catch (InterruptedException success) { }
356	<	}
357	<	});
358	<	try {
359	<	t.start();
360	<	Thread.sleep(SMALL_DELAY_MS);
361	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
362	<	t.interrupt();
363	<	t.join();
304	<	} catch (Exception e){
305	<	unexpectedException();
306	<	}
307	<	}
348	>	Thread t = new Thread(new CheckedRunnable() {
349	>	public void realRun() throws InterruptedException {
350	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
351	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
352	>	try {
353	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
354	>	shouldThrow();
355	>	} catch (InterruptedException success) {}
356	>	}});
357	>
358	>	t.start();
359	>	Thread.sleep(SMALL_DELAY_MS);
360	>	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
361	>	t.interrupt();
362	>	t.join();
363	>	}
364
365	+	/**
366	+	* Interrupted timed poll throws InterruptedException instead of
367	+	* returning timeout status
368	+	*/
369	+	public void testFairInterruptedTimedPoll() throws InterruptedException {
370	+	Thread t = new Thread(new CheckedInterruptedRunnable() {
371	+	public void realRun() throws InterruptedException {
372	+	SynchronousQueue q = new SynchronousQueue(true);
373	+	q.poll(SMALL_DELAY_MS, MILLISECONDS);
374	+	}});
375	+
376	+	t.start();
377	+	Thread.sleep(SHORT_DELAY_MS);
378	+	t.interrupt();
379	+	t.join();
380	+	}
381
382		/**
383	<	*
383	>	*  timed poll before a delayed offer fails; after offer succeeds;
384	>	*  on interruption throws
385	>	*/
386	>	public void testFairTimedPollWithOffer() throws InterruptedException {
387	>	final SynchronousQueue q = new SynchronousQueue(true);
388	>	Thread t = new Thread(new CheckedRunnable() {
389	>	public void realRun() throws InterruptedException {
390	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
391	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
392	>	try {
393	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
394	>	threadShouldThrow();
395	>	} catch (InterruptedException success) {}
396	>	}});
397	>
398	>	t.start();
399	>	Thread.sleep(SMALL_DELAY_MS);
400	>	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
401	>	t.interrupt();
402	>	t.join();
403	>	}
404	>
405	>
406	>	/**
407	>	* peek returns null
408		*/
409		public void testPeek() {
410		SynchronousQueue q = new SynchronousQueue();
411	<	assertNull(q.peek());
411	>	assertNull(q.peek());
412		}
413
414		/**
415	<	*
415	>	* element throws NSEE
416		*/
417		public void testElement() {
418		SynchronousQueue q = new SynchronousQueue();
419		try {
420		q.element();
421		shouldThrow();
422	<	}
327	<	catch (NoSuchElementException success) {}
422	>	} catch (NoSuchElementException success) {}
423		}
424
425		/**
426	<	*
426	>	* remove throws NSEE if no active taker
427		*/
428		public void testRemove() {
429		SynchronousQueue q = new SynchronousQueue();
430		try {
431		q.remove();
432		shouldThrow();
433	<	} catch (NoSuchElementException success){
339	<	}
433	>	} catch (NoSuchElementException success) {}
434		}
435
436		/**
437	<	*
437	>	* remove(x) returns false
438		*/
439		public void testRemoveElement() {
440		SynchronousQueue q = new SynchronousQueue();
441	<	assertFalse(q.remove(new Integer(0)));
441	>	assertFalse(q.remove(zero));
442		assertTrue(q.isEmpty());
443		}
444	<
444	>
445		/**
446	<	*
446	>	* contains returns false
447		*/
448		public void testContains() {
449		SynchronousQueue q = new SynchronousQueue();
450	<	assertFalse(q.contains(new Integer(0)));
450	>	assertFalse(q.contains(zero));
451		}
452
453		/**
454	<	*
454	>	* clear ensures isEmpty
455		*/
456		public void testClear() {
457		SynchronousQueue q = new SynchronousQueue();
#	Line 366 | Line 460 | public class SynchronousQueueTest extend
460		}
461
462		/**
463	<	*
463	>	* containsAll returns false unless empty
464		*/
465		public void testContainsAll() {
466		SynchronousQueue q = new SynchronousQueue();
467		Integer[] empty = new Integer[0];
468	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
468	>	assertTrue(q.containsAll(Arrays.asList(empty)));
469	>	Integer[] ints = new Integer[1]; ints[0] = zero;
470		assertFalse(q.containsAll(Arrays.asList(ints)));
471		}
472
473		/**
474	<	*
474	>	* retainAll returns false
475		*/
476		public void testRetainAll() {
477		SynchronousQueue q = new SynchronousQueue();
478		Integer[] empty = new Integer[0];
479	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
480	<	q.retainAll(Arrays.asList(ints));
481	<	assertFalse(q.containsAll(Arrays.asList(ints)));
479	>	assertFalse(q.retainAll(Arrays.asList(empty)));
480	>	Integer[] ints = new Integer[1]; ints[0] = zero;
481	>	assertFalse(q.retainAll(Arrays.asList(ints)));
482		}
483
484		/**
485	<	*
485	>	* removeAll returns false
486		*/
487		public void testRemoveAll() {
488		SynchronousQueue q = new SynchronousQueue();
489		Integer[] empty = new Integer[0];
490	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
491	<	q.removeAll(Arrays.asList(ints));
490	>	assertFalse(q.removeAll(Arrays.asList(empty)));
491	>	Integer[] ints = new Integer[1]; ints[0] = zero;
492		assertFalse(q.containsAll(Arrays.asList(ints)));
493		}
494
495
496		/**
497	<	*
497	>	* toArray is empty
498		*/
499		public void testToArray() {
500		SynchronousQueue q = new SynchronousQueue();
501	<	Object[] o = q.toArray();
501	>	Object[] o = q.toArray();
502		assertEquals(o.length, 0);
503		}
504
505		/**
506	<	*
506	>	* toArray(a) is nulled at position 0
507		*/
508		public void testToArray2() {
509		SynchronousQueue q = new SynchronousQueue();
510	<	Integer[] ints = new Integer[1];
510	>	Integer[] ints = new Integer[1];
511		assertNull(ints[0]);
512		}
513	<
513	>
514	>	/**
515	>	* toArray(null) throws NPE
516	>	*/
517	>	public void testToArray_BadArg() {
518	>	SynchronousQueue q = new SynchronousQueue();
519	>	try {
520	>	Object o[] = q.toArray(null);
521	>	shouldThrow();
522	>	} catch (NullPointerException success) {}
523	>	}
524	>
525	>
526		/**
527	<	*
527	>	* iterator does not traverse any elements
528		*/
529		public void testIterator() {
530		SynchronousQueue q = new SynchronousQueue();
531	<	Iterator it = q.iterator();
531	>	Iterator it = q.iterator();
532		assertFalse(it.hasNext());
533		try {
534		Object x = it.next();
535		shouldThrow();
536	<	}
430	<	catch (NoSuchElementException success) {}
536	>	} catch (NoSuchElementException success) {}
537		}
538
539		/**
540	<	*
540	>	* iterator remove throws ISE
541		*/
542		public void testIteratorRemove() {
543		SynchronousQueue q = new SynchronousQueue();
544	<	Iterator it = q.iterator();
544	>	Iterator it = q.iterator();
545		try {
546		it.remove();
547		shouldThrow();
548	<	}
443	<	catch (IllegalStateException success) {}
548	>	} catch (IllegalStateException success) {}
549		}
550
551		/**
552	<	*
552	>	* toString returns a non-null string
553		*/
554		public void testToString() {
555		SynchronousQueue q = new SynchronousQueue();
556		String s = q.toString();
557	<	assertTrue(s != null);
558	<	}
557	>	assertNotNull(s);
558	>	}
559
560
561		/**
562	<	*
562	>	* offer transfers elements across Executor tasks
563		*/
564		public void testOfferInExecutor() {
565		final SynchronousQueue q = new SynchronousQueue();
566		ExecutorService executor = Executors.newFixedThreadPool(2);
462	–	final Integer one = new Integer(1);
567
568	<	executor.execute(new Runnable() {
569	<	public void run() {
570	<	threadAssertFalse(q.offer(one));
571	<	try {
572	<	threadAssertTrue(q.offer(one, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
573	<	threadAssertEquals(0, q.remainingCapacity());
574	<	}
575	<	catch (InterruptedException e) {
576	<	threadUnexpectedException();
577	<	}
578	<	}
579	<	});
568	>	executor.execute(new CheckedRunnable() {
569	>	public void realRun() throws InterruptedException {
570	>	assertFalse(q.offer(one));
571	>	assertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
572	>	assertEquals(0, q.remainingCapacity());
573	>	}});
574	>
575	>	executor.execute(new CheckedRunnable() {
576	>	public void realRun() throws InterruptedException {
577	>	Thread.sleep(SMALL_DELAY_MS);
578	>	assertSame(one, q.take());
579	>	}});
580
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	–
581		joinPool(executor);
490	–
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	+	* drainTo(null) throws NPE
626	+	*/
627	+	public void testDrainToNull() {
628	+	SynchronousQueue q = new SynchronousQueue();
629	+	try {
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	<	*
679	>	* drainTo(null, n) throws NPE
680		*/
681	<	public void testSerialization() {
681	>	public void testDrainToNullN() {
682		SynchronousQueue q = new SynchronousQueue();
683		try {
684	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
685	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
686	<	out.writeObject(q);
687	<	out.close();
688	<
689	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
690	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
691	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
692	<	assertEquals(q.size(), r.size());
693	<	while (!q.isEmpty())
694	<	assertEquals(q.remove(), r.remove());
695	<	} catch(Exception e){
696	<	unexpectedException();
697	<	}
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	>	assertEquals(1, l.size());
721	>	q.drainTo(l, 1);
722	>	assertEquals(2, l.size());
723	>	assertTrue(l.contains(one));
724	>	assertTrue(l.contains(two));
725	>	t1.join();
726	>	t2.join();
727		}
728
729		}

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