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root/jsr166/jsr166/src/test/tck/SynchronousQueueTest.java

Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 20:39:11 2003 UTC vs.
Revision 1.15 by jsr166, Sat Nov 21 19:11:53 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 TestCase {
14	<
15	<	private final static int N = 1;
16	<	private static long SHORT_DELAY_MS = 100;
17	<	private static long MEDIUM_DELAY_MS = 1000;
18	<	private static long LONG_DELAY_MS = 10000;
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(zero));
34	>	}
35	>
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(new Integer(3)));
44	>	assertFalse(q.offer(zero));
45		}
46
47	<	public void testOfferNull(){
48	<	try {
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	<	}
64	<	catch (NullPointerException success) {}
96	>	shouldThrow();
97	>	} catch (NullPointerException success) {}
98		}
99	<	public void testAddAll2(){
99	>
100	>	/**
101	>	* addAll(this) throws IAE
102	>	*/
103	>	public void testAddAllSelf() {
104		try {
105		SynchronousQueue q = new SynchronousQueue();
106	<	Integer[] ints = new Integer[N];
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 {
116	>	SynchronousQueue q = new SynchronousQueue();
117	>	Integer[] ints = new Integer[1];
118		q.addAll(Arrays.asList(ints));
119	<	fail("Cannot add null elements");
120	<	}
73	<	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[N];
129	<	for (int i = 0; i < N; ++i)
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	<	}
84	<	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	<	}
93	<	catch (NullPointerException success){
94	<	}
95	<	catch (InterruptedException ie) {
96	<	fail("Unexpected exception");
97	<	}
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	<	fail("put should block");
154	<	} catch (InterruptedException ie){
155	<	}
156	<	}});
157	<	t.start();
158	<	try {
159	<	Thread.sleep(SHORT_DELAY_MS);
160	<	t.interrupt();
114	<	t.join();
115	<	}
116	<	catch (InterruptedException ie) {
117	<	fail("Unexpected exception");
118	<	}
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;
174	<	q.put(new Object());
175	<	++added;
176	<	q.put(new Object());
177	<	++added;
178	<	q.put(new Object());
179	<	++added;
180	<	fail("Should block");
181	<	} catch (InterruptedException e){
182	<	assertTrue(added >= 1);
138	<	}
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();
148	<	} catch (Exception e){
149	<	fail("Unexpected exception");
150	<	}
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	<	public void testTimedOffer() {
194	>	/**
195	>	* timed offer times out if elements not taken
196	>	*/
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	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
204	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
205	<	fail("Should block");
206	<	} catch (InterruptedException success){}
207	<	}
208	<	});
165	<
166	<	try {
167	<	t.start();
168	<	Thread.sleep(SHORT_DELAY_MS);
169	<	t.interrupt();
170	<	t.join();
171	<	} catch (Exception e){
172	<	fail("Unexpected exception");
173	<	}
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	<	public void testTakeFromEmpty() {
212	>	/**
213	>	* take blocks interruptibly when empty
214	>	*/
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	<	fail("Should block");
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	<	fail("Unexpected exception");
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	<	public void testPoll(){
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	>	* 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	<	public void testTimedPoll0() {
319	<	try {
320	<	SynchronousQueue q = new SynchronousQueue();
321	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
322	<	} catch (InterruptedException e){
323	<	fail("Unexpected exception");
208	<	}
318	>	/**
319	>	* timed pool with zero timeout times out if no active taker
320	>	*/
321	>	public void testTimedPoll0() throws InterruptedException {
322	>	SynchronousQueue q = new SynchronousQueue();
323	>	assertNull(q.poll(0, MILLISECONDS));
324		}
325
326	<	public void testTimedPoll() {
327	<	try {
328	<	SynchronousQueue q = new SynchronousQueue();
329	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
330	<	} catch (InterruptedException e){
331	<	fail("Unexpected exception");
217	<	}
218	<	}
219	<
220	<	public void testInterruptedTimedPoll(){
221	<	Thread t = new Thread(new Runnable() {
222	<	public void run() {
223	<	try {
224	<	SynchronousQueue q = new SynchronousQueue();
225	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
226	<	} catch (InterruptedException success){
227	<	}
228	<	}});
229	<	t.start();
230	<	try {
231	<	Thread.sleep(SHORT_DELAY_MS);
232	<	t.interrupt();
233	<	t.join();
234	<	}
235	<	catch (InterruptedException ie) {
236	<	fail("Unexpected exception");
237	<	}
326	>	/**
327	>	* timed pool with nonzero timeout times out if no active taker
328	>	*/
329	>	public void testTimedPoll() throws InterruptedException {
330	>	SynchronousQueue q = new SynchronousQueue();
331	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
332		}
333
334	<	public void testTimedPollWithOffer(){
334	>	/**
335	>	* Interrupted timed poll throws InterruptedException instead of
336	>	* returning timeout status
337	>	*/
338	>	public void testInterruptedTimedPoll() throws InterruptedException {
339		final SynchronousQueue q = new SynchronousQueue();
340	<	Thread t = new Thread(new Runnable() {
341	<	public void run(){
342	<	try {
343	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
246	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
247	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
248	<	fail("Should block");
249	<	} catch (InterruptedException success) { }
250	<	}
251	<	});
252	<	try {
253	<	t.start();
254	<	Thread.sleep(SHORT_DELAY_MS * 2);
255	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
256	<	t.interrupt();
257	<	t.join();
258	<	} catch (Exception e){
259	<	fail("Unexpected exception");
260	<	}
261	<	}
340	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
341	>	public void realRun() throws InterruptedException {
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	<	public void testPeek(){
351	>	/**
352	>	*  timed poll before a delayed offer fails; after offer succeeds;
353	>	*  on interruption throws
354	>	*/
355	>	public void testTimedPollWithOffer() throws InterruptedException {
356	>	final SynchronousQueue q = new SynchronousQueue();
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	>	*  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	<	public void testElement(){
423	>	/**
424	>	* element throws NSEE
425	>	*/
426	>	public void testElement() {
427		SynchronousQueue q = new SynchronousQueue();
428		try {
429		q.element();
430	<	fail("no such element");
431	<	}
275	<	catch (NoSuchElementException success) {}
430	>	shouldThrow();
431	>	} catch (NoSuchElementException success) {}
432		}
433
434	<	public void testRemove(){
434	>	/**
435	>	* remove throws NSEE if no active taker
436	>	*/
437	>	public void testRemove() {
438		SynchronousQueue q = new SynchronousQueue();
439		try {
440		q.remove();
441	<	fail("remove should throw");
442	<	} catch (NoSuchElementException success){
443	<	}
441	>	shouldThrow();
442	>	} catch (NoSuchElementException success) {
443	>	}
444		}
445
446	<	public void testRemoveElement(){
446	>	/**
447	>	* remove(x) returns false
448	>	*/
449	>	public void testRemoveElement() {
450		SynchronousQueue q = new SynchronousQueue();
451	<	for (int i = 1; i < N; i+=2) {
290	<	assertFalse(q.remove(new Integer(i)));
291	<	}
451	>	assertFalse(q.remove(zero));
452		assertTrue(q.isEmpty());
453		}
454	<
455	<	public void testContains(){
456	<	SynchronousQueue q = new SynchronousQueue();
457	<	for (int i = 0; i < N; ++i) {
458	<	assertFalse(q.contains(new Integer(i)));
459	<	}
454	>
455	>	/**
456	>	* contains returns false
457	>	*/
458	>	public void testContains() {
459	>	SynchronousQueue q = new SynchronousQueue();
460	>	assertFalse(q.contains(zero));
461		}
462
463	<	public void testClear(){
463	>	/**
464	>	* clear ensures isEmpty
465	>	*/
466	>	public void testClear() {
467		SynchronousQueue q = new SynchronousQueue();
468		q.clear();
469		assertTrue(q.isEmpty());
470		}
471
472	<	public void testContainsAll(){
472	>	/**
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);
479	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
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	<	public void testRetainAll(){
483	>	/**
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	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
322	<	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	<	public void testRemoveAll(){
494	>	/**
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));
330	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
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	<	public void testToArray(){
506	>	/**
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	<	public void testToArray2(){
515	>	/**
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	<
524	<	public void testIterator(){
523	>
524	>	/**
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	<	fail("should throw");
546	<	}
355	<	catch (NoSuchElementException success) {}
545	>	shouldThrow();
546	>	} catch (NoSuchElementException success) {}
547		}
548
549	<	public void testIteratorRemove(){
549	>	/**
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	<	fail("should throw");
558	<	}
365	<	catch (IllegalStateException success) {}
557	>	shouldThrow();
558	>	} catch (IllegalStateException success) {}
559		}
560
561	<	public void testToString(){
561	>	/**
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	+	* 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() {
581	<	assertFalse(q.offer(one));
582	<	try {
583	<	assertTrue(q.offer(one, MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
584	<	assertEquals(0, q.remainingCapacity());
585	<	}
586	<	catch (InterruptedException e) {
587	<	fail("should not be interrupted");
588	<	}
589	<	}
590	<	});
591	<
592	<	executor.execute(new Runnable() {
394	<	public void run() {
395	<	try {
396	<	Thread.sleep(MEDIUM_DELAY_MS);
397	<	assertEquals(one, q.take());
398	<	}
399	<	catch (InterruptedException e) {
400	<	fail("should not be interrupted");
401	<	}
402	<	}
403	<	});
404	<
405	<	executor.shutdown();
579	>	executor.execute(new CheckedRunnable() {
580	>	public void realRun() throws InterruptedException {
581	>	threadAssertFalse(q.offer(one));
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	>
592	>	joinPool(executor);
593
594		}
595
596	+	/**
597	+	* poll retrieves elements across Executor threads
598	+	*/
599		public void testPollInExecutor() {
410	–
600		final SynchronousQueue q = new SynchronousQueue();
412	–
601		ExecutorService executor = Executors.newFixedThreadPool(2);
602	+	executor.execute(new CheckedRunnable() {
603	+	public void realRun() throws InterruptedException {
604	+	threadAssertNull(q.poll());
605	+	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
606	+	threadAssertTrue(q.isEmpty());
607	+	}});
608
609	<	executor.execute(new Runnable() {
610	<	public void run() {
611	<	assertNull(q.poll());
612	<	try {
613	<	assertTrue(null != q.poll(MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
420	<	assertTrue(q.isEmpty());
421	<	}
422	<	catch (InterruptedException e) {
423	<	fail("should not be interrupted");
424	<	}
425	<	}
426	<	});
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
615	<	executor.execute(new Runnable() {
616	<	public void run() {
617	<	try {
618	<	Thread.sleep(MEDIUM_DELAY_MS);
619	<	q.put(new Integer(1));
620	<	}
621	<	catch (InterruptedException e) {
622	<	fail("should not be interrupted");
623	<	}
624	<	}
625	<	});
626	<
627	<	executor.shutdown();
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	<	public void testSerialization() {
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	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
697	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
698	<	out.writeObject(q);
699	<	out.close();
696	>	q.drainTo(null, 0);
697	>	shouldThrow();
698	>	} catch (NullPointerException success) {}
699	>	}
700
701	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
702	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
703	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
704	<	assertEquals(q.size(), r.size());
705	<	while (!q.isEmpty())
706	<	assertEquals(q.remove(), r.remove());
707	<	} catch(Exception e){
708	<	fail("unexpected exception");
701	>	/**
702	>	* drainTo(this, n) throws IAE
703	>	*/
704	>	public void testDrainToSelfN() {
705	>	SynchronousQueue q = new SynchronousQueue();
706	>	try {
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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