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Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 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	+	* 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	<	public void testOfferNull(){
37	<	try {
36	>	/**
37	>	* A fair SynchronousQueue is both empty and full
38	>	*/
39	>	public void testFairEmptyFull() {
40	>	SynchronousQueue q = new SynchronousQueue(true);
41	>	assertTrue(q.isEmpty());
42	>	assertEquals(0, q.size());
43	>	assertEquals(0, q.remainingCapacity());
44	>	assertFalse(q.offer(zero));
45	>	}
46	>
47	>	/**
48	>	* offer(null) throws NPE
49	>	*/
50	>	public void testOfferNull() {
51	>	try {
52		SynchronousQueue q = new SynchronousQueue();
53		q.offer(null);
54	<	fail("should throw NPE");
55	<	} catch (NullPointerException success) { }
54	>	shouldThrow();
55	>	} catch (NullPointerException success) {}
56	>	}
57	>
58	>	/**
59	>	* add(null) throws NPE
60	>	*/
61	>	public void testAddNull() {
62	>	try {
63	>	SynchronousQueue q = new SynchronousQueue();
64	>	q.add(null);
65	>	shouldThrow();
66	>	} catch (NullPointerException success) {}
67		}
68
69	<	public void testOffer(){
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	<	public void testAdd(){
78	<	try {
77	>	/**
78	>	* add throws ISE if no active taker
79	>	*/
80	>	public void testAdd() {
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	<	public void testAddAll1(){
89	>	/**
90	>	* addAll(null) throws NPE
91	>	*/
92	>	public void testAddAll1() {
93		try {
94		SynchronousQueue q = new SynchronousQueue();
95		q.addAll(null);
96	<	fail("Cannot add null collection");
97	<	}
98	<	catch (NullPointerException success) {}
96	>	shouldThrow();
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	<	public void testAddAll2(){
110	>
111	>	/**
112	>	* addAll of a collection with null elements throws NPE
113	>	*/
114	>	public void testAddAll2() {
115		try {
116		SynchronousQueue q = new SynchronousQueue();
117		Integer[] ints = new Integer[1];
118		q.addAll(Arrays.asList(ints));
119	<	fail("Cannot add null elements");
120	<	}
68	<	catch (NullPointerException success) {}
119	>	shouldThrow();
120	>	} catch (NullPointerException success) {}
121		}
122	<	public void testAddAll4(){
122	>	/**
123	>	* addAll throws ISE if no active taker
124	>	*/
125	>	public void testAddAll4() {
126		try {
127		SynchronousQueue q = new SynchronousQueue();
128		Integer[] ints = new Integer[1];
129		for (int i = 0; i < 1; ++i)
130		ints[i] = new Integer(i);
131		q.addAll(Arrays.asList(ints));
132	<	fail("Cannot add with insufficient capacity");
133	<	}
79	<	catch (IllegalStateException success) {}
132	>	shouldThrow();
133	>	} catch (IllegalStateException success) {}
134		}
135
136	<	public void testPutNull() {
137	<	try {
136	>	/**
137	>	* put(null) throws NPE
138	>	*/
139	>	public void testPutNull() throws InterruptedException {
140	>	try {
141		SynchronousQueue q = new SynchronousQueue();
142		q.put(null);
143	<	fail("put should throw NPE");
144	<	}
88	<	catch (NullPointerException success){
89	<	}
90	<	catch (InterruptedException ie) {
91	<	fail("Unexpected exception");
92	<	}
143	>	shouldThrow();
144	>	} catch (NullPointerException success) {}
145		}
146
147	<	public void testBlockingPut(){
148	<	Thread t = new Thread(new Runnable() {
149	<	public void run() {
150	<	try {
151	<	SynchronousQueue q = new SynchronousQueue();
152	<	q.put(new Integer(0));
153	<	threadFail("put should block");
154	<	} catch (InterruptedException ie){
155	<	}
156	<	}});
157	<	t.start();
158	<	try {
159	<	Thread.sleep(SHORT_DELAY_MS);
160	<	t.interrupt();
109	<	t.join();
110	<	}
111	<	catch (InterruptedException ie) {
112	<	fail("Unexpected exception");
113	<	}
147	>	/**
148	>	* put blocks interruptibly if no active taker
149	>	*/
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	<	public void testPutWithTake() {
163	>	/**
164	>	* put blocks waiting for take
165	>	*/
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;
124	<	q.put(new Object());
125	<	++added;
126	<	q.put(new Object());
127	<	++added;
128	<	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;
130	–	threadFail("Should block");
131	–	} catch (InterruptedException e){
132	–	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();
143	<	} catch (Exception e){
144	<	fail("Unexpected exception");
145	<	}
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	<	public void testTimedOffer() {
189	>	/**
190	>	* timed offer times out if elements not taken
191	>	*/
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	<	threadFail("Should block");
201	<	} catch (InterruptedException success){}
202	<	}
203	<	});
160	<
161	<	try {
162	<	t.start();
163	<	Thread.sleep(SMALL_DELAY_MS);
164	<	t.interrupt();
165	<	t.join();
166	<	} catch (Exception e){
167	<	fail("Unexpected exception");
168	<	}
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	<	public void testTakeFromEmpty() {
207	>	/**
208	>	* take blocks interruptibly when empty
209	>	*/
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	<	threadFail("Should block");
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	<	fail("Unexpected exception");
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	<	public void testPoll(){
283	>
284	>	/**
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	<	public void testTimedPoll0() {
309	<	try {
310	<	SynchronousQueue q = new SynchronousQueue();
311	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
312	<	} catch (InterruptedException e){
313	<	fail("Unexpected exception");
203	<	}
308	>	/**
309	>	* timed pool with zero timeout times out if no active taker
310	>	*/
311	>	public void testTimedPoll0() throws InterruptedException {
312	>	SynchronousQueue q = new SynchronousQueue();
313	>	assertNull(q.poll(0, MILLISECONDS));
314		}
315
316	<	public void testTimedPoll() {
317	<	try {
318	<	SynchronousQueue q = new SynchronousQueue();
319	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
320	<	} catch (InterruptedException e){
321	<	fail("Unexpected exception");
212	<	}
213	<	}
214	<
215	<	public void testInterruptedTimedPoll(){
216	<	Thread t = new Thread(new Runnable() {
217	<	public void run() {
218	<	try {
219	<	SynchronousQueue q = new SynchronousQueue();
220	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
221	<	} catch (InterruptedException success){
222	<	}
223	<	}});
224	<	t.start();
225	<	try {
226	<	Thread.sleep(SHORT_DELAY_MS);
227	<	t.interrupt();
228	<	t.join();
229	<	}
230	<	catch (InterruptedException ie) {
231	<	fail("Unexpected exception");
232	<	}
316	>	/**
317	>	* timed pool with nonzero timeout times out if no active taker
318	>	*/
319	>	public void testTimedPoll() throws InterruptedException {
320	>	SynchronousQueue q = new SynchronousQueue();
321	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
322		}
323
324	<	public void testTimedPollWithOffer(){
324	>	/**
325	>	* Interrupted timed poll throws InterruptedException instead of
326	>	* returning timeout status
327	>	*/
328	>	public void testInterruptedTimedPoll() throws InterruptedException {
329		final SynchronousQueue q = new SynchronousQueue();
330	<	Thread t = new Thread(new Runnable() {
331	<	public void run(){
332	<	try {
333	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
334	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
335	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
336	<	threadFail("Should block");
337	<	} catch (InterruptedException success) { }
338	<	}
339	<	});
340	<	try {
341	<	t.start();
342	<	Thread.sleep(SMALL_DELAY_MS);
343	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
344	<	t.interrupt();
345	<	t.join();
346	<	} catch (Exception e){
347	<	fail("Unexpected exception");
348	<	}
349	<	}
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	>	Thread.sleep(SHORT_DELAY_MS);
337	>	t.interrupt();
338	>	t.join();
339	>	}
340	>
341	>	/**
342	>	*  timed poll before a delayed offer fails; after offer succeeds;
343	>	*  on interruption throws
344	>	*/
345	>	public void testTimedPollWithOffer() throws InterruptedException {
346	>	final SynchronousQueue q = new SynchronousQueue();
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	>	*  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	<	public void testPeek(){
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	<	public void testElement(){
413	>	/**
414	>	* element throws NSEE
415	>	*/
416	>	public void testElement() {
417		SynchronousQueue q = new SynchronousQueue();
418		try {
419		q.element();
420	<	fail("no such element");
421	<	}
270	<	catch (NoSuchElementException success) {}
420	>	shouldThrow();
421	>	} catch (NoSuchElementException success) {}
422		}
423
424	<	public void testRemove(){
424	>	/**
425	>	* remove throws NSEE if no active taker
426	>	*/
427	>	public void testRemove() {
428		SynchronousQueue q = new SynchronousQueue();
429		try {
430		q.remove();
431	<	fail("remove should throw");
432	<	} catch (NoSuchElementException success){
279	<	}
431	>	shouldThrow();
432	>	} catch (NoSuchElementException success) {}
433		}
434
435	<	public void testRemoveElement(){
435	>	/**
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	<
444	<	public void testContains(){
445	<	SynchronousQueue q = new SynchronousQueue();
446	<	assertFalse(q.contains(new Integer(0)));
443	>
444	>	/**
445	>	* contains returns false
446	>	*/
447	>	public void testContains() {
448	>	SynchronousQueue q = new SynchronousQueue();
449	>	assertFalse(q.contains(zero));
450		}
451
452	<	public void testClear(){
452	>	/**
453	>	* clear ensures isEmpty
454	>	*/
455	>	public void testClear() {
456		SynchronousQueue q = new SynchronousQueue();
457		q.clear();
458		assertTrue(q.isEmpty());
459		}
460
461	<	public void testContainsAll(){
461	>	/**
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);
468	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
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	<	public void testRetainAll(){
472	>	/**
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	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
313	<	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	<	public void testRemoveAll(){
483	>	/**
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));
321	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
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	<	public void testToArray(){
495	>	/**
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	<	public void testToArray2(){
504	>	/**
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	<
513	<	public void testIterator(){
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	>	* 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	<	fail("should throw");
535	<	}
346	<	catch (NoSuchElementException success) {}
534	>	shouldThrow();
535	>	} catch (NoSuchElementException success) {}
536		}
537
538	<	public void testIteratorRemove(){
538	>	/**
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	<	fail("should throw");
547	<	}
356	<	catch (IllegalStateException success) {}
546	>	shouldThrow();
547	>	} catch (IllegalStateException success) {}
548		}
549
550	<	public void testToString(){
550	>	/**
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	+	* offer transfers elements across Executor tasks
562	+	*/
563		public void testOfferInExecutor() {
564		final SynchronousQueue q = new SynchronousQueue();
565		ExecutorService executor = Executors.newFixedThreadPool(2);
369	–	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	<	threadFail("should not be interrupted");
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
384	–	executor.execute(new Runnable() {
385	–	public void run() {
386	–	try {
387	–	Thread.sleep(SMALL_DELAY_MS);
388	–	threadAssertEquals(one, q.take());
389	–	}
390	–	catch (InterruptedException e) {
391	–	fail("should not be interrupted");
392	–	}
393	–	}
394	–	});
395	–
580		joinPool(executor);
581
582		}
583
584	+	/**
585	+	* poll retrieves elements across Executor threads
586	+	*/
587		public void testPollInExecutor() {
401	–
588		final SynchronousQueue q = new SynchronousQueue();
403	–
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
406	–	executor.execute(new Runnable() {
407	–	public void run() {
408	–	threadAssertNull(q.poll());
409	–	try {
410	–	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
411	–	threadAssertTrue(q.isEmpty());
412	–	}
413	–	catch (InterruptedException e) {
414	–	threadFail("should not be interrupted");
415	–	}
416	–	}
417	–	});
418	–
419	–	executor.execute(new Runnable() {
420	–	public void run() {
421	–	try {
422	–	Thread.sleep(SMALL_DELAY_MS);
423	–	q.put(new Integer(1));
424	–	}
425	–	catch (InterruptedException e) {
426	–	threadFail("should not be interrupted");
427	–	}
428	–	}
429	–	});
430	–
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	<	public void testSerialization() {
624	>	/**
625	>	* drainTo(null) throws NPE
626	>	*/
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	<	fail("unexpected exception");
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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