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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 1.23 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	+	* 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	>	/**
124	>	* addAll throws ISE if no active taker
125	>	*/
126	>	public void testAddAll4() {
127		try {
128		SynchronousQueue q = new SynchronousQueue();
129		Integer[] ints = new Integer[1];
130		for (int i = 0; i < 1; ++i)
131		ints[i] = new Integer(i);
132		q.addAll(Arrays.asList(ints));
133	<	fail("Cannot add with insufficient capacity");
134	<	}
79	<	catch (IllegalStateException success) {}
133	>	shouldThrow();
134	>	} catch (IllegalStateException success) {}
135		}
136
137	<	public void testPutNull() {
138	<	try {
137	>	/**
138	>	* put(null) throws NPE
139	>	*/
140	>	public void testPutNull() throws InterruptedException {
141	>	try {
142		SynchronousQueue q = new SynchronousQueue();
143		q.put(null);
144	<	fail("put should throw NPE");
145	<	}
88	<	catch (NullPointerException success){
89	<	}
90	<	catch (InterruptedException ie) {
91	<	fail("Unexpected exception");
92	<	}
144	>	shouldThrow();
145	>	} catch (NullPointerException success) {}
146		}
147
148	<	public void testBlockingPut(){
149	<	Thread t = new Thread(new Runnable() {
150	<	public void run() {
151	<	try {
152	<	SynchronousQueue q = new SynchronousQueue();
153	<	q.put(new Integer(0));
154	<	threadFail("put should block");
155	<	} catch (InterruptedException ie){
156	<	}
157	<	}});
158	<	t.start();
159	<	try {
160	<	Thread.sleep(SHORT_DELAY_MS);
161	<	t.interrupt();
109	<	t.join();
110	<	}
111	<	catch (InterruptedException ie) {
112	<	fail("Unexpected exception");
113	<	}
148	>	/**
149	>	* put blocks interruptibly if no active taker
150	>	*/
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	<	public void testPutWithTake() {
164	>	/**
165	>	* put blocks waiting for take
166	>	*/
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;
124	<	q.put(new Object());
125	<	++added;
126	<	q.put(new Object());
127	<	++added;
128	<	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;
130	–	threadFail("Should block");
131	–	} catch (InterruptedException e){
132	–	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();
143	<	} catch (Exception e){
144	<	fail("Unexpected exception");
145	<	}
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	<	public void testTimedOffer() {
190	>	/**
191	>	* timed offer times out if elements not taken
192	>	*/
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	<	threadFail("Should block");
202	<	} catch (InterruptedException success){}
203	<	}
204	<	});
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	<	}
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	<	public void testTakeFromEmpty() {
208	>	/**
209	>	* take blocks interruptibly when empty
210	>	*/
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	<	threadFail("Should block");
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	<	fail("Unexpected exception");
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	>	* 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	<	public void testPoll(){
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	<	public void testTimedPoll0() {
310	<	try {
311	<	SynchronousQueue q = new SynchronousQueue();
312	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
313	<	} catch (InterruptedException e){
314	<	fail("Unexpected exception");
203	<	}
309	>	/**
310	>	* timed pool with zero timeout times out if no active taker
311	>	*/
312	>	public void testTimedPoll0() throws InterruptedException {
313	>	SynchronousQueue q = new SynchronousQueue();
314	>	assertNull(q.poll(0, MILLISECONDS));
315		}
316
317	<	public void testTimedPoll() {
318	<	try {
319	<	SynchronousQueue q = new SynchronousQueue();
320	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
321	<	} catch (InterruptedException e){
322	<	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	<	}
317	>	/**
318	>	* timed pool with nonzero timeout times out if no active taker
319	>	*/
320	>	public void testTimedPoll() throws InterruptedException {
321	>	SynchronousQueue q = new SynchronousQueue();
322	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
323		}
324
325	<	public void testTimedPollWithOffer(){
325	>	/**
326	>	* Interrupted timed poll throws InterruptedException instead of
327	>	* returning timeout status
328	>	*/
329	>	public void testInterruptedTimedPoll() throws InterruptedException {
330		final SynchronousQueue q = new SynchronousQueue();
331	<	Thread t = new Thread(new Runnable() {
332	<	public void run(){
333	<	try {
334	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
335	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
336	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
337	<	threadFail("Should block");
338	<	} catch (InterruptedException success) { }
339	<	}
340	<	});
341	<	try {
342	<	t.start();
343	<	Thread.sleep(SMALL_DELAY_MS);
344	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
345	<	t.interrupt();
346	<	t.join();
347	<	} catch (Exception e){
348	<	fail("Unexpected exception");
349	<	}
350	<	}
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	>	Thread.sleep(SHORT_DELAY_MS);
338	>	t.interrupt();
339	>	t.join();
340	>	}
341	>
342	>	/**
343	>	*  timed poll before a delayed offer fails; after offer succeeds;
344	>	*  on interruption throws
345	>	*/
346	>	public void testTimedPollWithOffer() throws InterruptedException {
347	>	final SynchronousQueue q = new SynchronousQueue();
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	>	*  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	<	public void testPeek(){
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	<	public void testElement(){
414	>	/**
415	>	* element throws NSEE
416	>	*/
417	>	public void testElement() {
418		SynchronousQueue q = new SynchronousQueue();
419		try {
420		q.element();
421	<	fail("no such element");
422	<	}
270	<	catch (NoSuchElementException success) {}
421	>	shouldThrow();
422	>	} catch (NoSuchElementException success) {}
423		}
424
425	<	public void testRemove(){
425	>	/**
426	>	* remove throws NSEE if no active taker
427	>	*/
428	>	public void testRemove() {
429		SynchronousQueue q = new SynchronousQueue();
430		try {
431		q.remove();
432	<	fail("remove should throw");
433	<	} catch (NoSuchElementException success){
279	<	}
432	>	shouldThrow();
433	>	} catch (NoSuchElementException success) {}
434		}
435
436	<	public void testRemoveElement(){
436	>	/**
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	<
445	<	public void testContains(){
446	<	SynchronousQueue q = new SynchronousQueue();
447	<	assertFalse(q.contains(new Integer(0)));
444	>
445	>	/**
446	>	* contains returns false
447	>	*/
448	>	public void testContains() {
449	>	SynchronousQueue q = new SynchronousQueue();
450	>	assertFalse(q.contains(zero));
451		}
452
453	<	public void testClear(){
453	>	/**
454	>	* clear ensures isEmpty
455	>	*/
456	>	public void testClear() {
457		SynchronousQueue q = new SynchronousQueue();
458		q.clear();
459		assertTrue(q.isEmpty());
460		}
461
462	<	public void testContainsAll(){
462	>	/**
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);
469	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
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	<	public void testRetainAll(){
473	>	/**
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	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
313	<	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	<	public void testRemoveAll(){
484	>	/**
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));
321	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
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	<	public void testToArray(){
496	>	/**
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	<	public void testToArray2(){
505	>	/**
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	<
514	<	public void testIterator(){
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	>	* 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	<	fail("should throw");
536	<	}
346	<	catch (NoSuchElementException success) {}
535	>	shouldThrow();
536	>	} catch (NoSuchElementException success) {}
537		}
538
539	<	public void testIteratorRemove(){
539	>	/**
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	<	fail("should throw");
548	<	}
356	<	catch (IllegalStateException success) {}
547	>	shouldThrow();
548	>	} catch (IllegalStateException success) {}
549		}
550
551	<	public void testToString(){
551	>	/**
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	+	* offer transfers elements across Executor tasks
563	+	*/
564		public void testOfferInExecutor() {
565		final SynchronousQueue q = new SynchronousQueue();
566		ExecutorService executor = Executors.newFixedThreadPool(2);
369	–	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	<	threadFail("should not be interrupted");
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
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	–
581		joinPool(executor);
397	–
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	+	/**
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	+	* 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	<	public void testSerialization() {
689	>	/**
690	>	* drainTo(this, n) throws IAE
691	>	*/
692	>	public void testDrainToSelfN() {
693		SynchronousQueue q = new SynchronousQueue();
694		try {
695	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
696	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
697	<	out.writeObject(q);
698	<	out.close();
699	<
700	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
701	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
702	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
703	<	assertEquals(q.size(), r.size());
704	<	while (!q.isEmpty())
705	<	assertEquals(q.remove(), r.remove());
706	<	} catch(Exception e){
707	<	fail("unexpected exception");
708	<	}
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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