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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 1.18 by jsr166, Sun Nov 22 18:57:17 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	<	}
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[N];
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	>	assertFalse(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	>
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	<	public void testPoll(){
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));
344	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
345	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
346	<	fail("Should block");
347	<	} catch (InterruptedException success) { }
348	<	}
349	<	});
350	<	try {
351	<	t.start();
352	<	Thread.sleep(SHORT_DELAY_MS * 2);
353	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
354	<	t.interrupt();
355	<	t.join();
356	<	} catch (Exception e){
357	<	fail("Unexpected exception");
358	<	}
359	<	}
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	>	/**
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	>	assertNull(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	>	shouldThrow();
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	>	assertNull(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	<	public void testPeek(){
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){
284	<	}
441	>	shouldThrow();
442	>	} catch (NoSuchElementException success) {}
443		}
444
445	<	public void testRemoveElement(){
445	>	/**
446	>	* remove(x) returns false
447	>	*/
448	>	public void testRemoveElement() {
449		SynchronousQueue q = new SynchronousQueue();
450	<	for (int i = 1; i < N; i+=2) {
290	<	assertFalse(q.remove(new Integer(i)));
291	<	}
450	>	assertFalse(q.remove(zero));
451		assertTrue(q.isEmpty());
452		}
453	<
454	<	public void testContains(){
455	<	SynchronousQueue q = new SynchronousQueue();
456	<	for (int i = 0; i < N; ++i) {
457	<	assertFalse(q.contains(new Integer(i)));
458	<	}
453	>
454	>	/**
455	>	* contains returns false
456	>	*/
457	>	public void testContains() {
458	>	SynchronousQueue q = new SynchronousQueue();
459	>	assertFalse(q.contains(zero));
460		}
461
462	<	public void testClear(){
462	>	/**
463	>	* clear ensures isEmpty
464	>	*/
465	>	public void testClear() {
466		SynchronousQueue q = new SynchronousQueue();
467		q.clear();
468		assertTrue(q.isEmpty());
469		}
470
471	<	public void testContainsAll(){
471	>	/**
472	>	* containsAll returns false unless empty
473	>	*/
474	>	public void testContainsAll() {
475		SynchronousQueue q = new SynchronousQueue();
476		Integer[] empty = new Integer[0];
477	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
478	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
477	>	assertTrue(q.containsAll(Arrays.asList(empty)));
478	>	Integer[] ints = new Integer[1]; ints[0] = zero;
479		assertFalse(q.containsAll(Arrays.asList(ints)));
480		}
481
482	<	public void testRetainAll(){
482	>	/**
483	>	* retainAll returns false
484	>	*/
485	>	public void testRetainAll() {
486		SynchronousQueue q = new SynchronousQueue();
487		Integer[] empty = new Integer[0];
488	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
489	<	q.retainAll(Arrays.asList(ints));
490	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
322	<	assertFalse(q.containsAll(Arrays.asList(ints)));
488	>	assertFalse(q.retainAll(Arrays.asList(empty)));
489	>	Integer[] ints = new Integer[1]; ints[0] = zero;
490	>	assertFalse(q.retainAll(Arrays.asList(ints)));
491		}
492
493	<	public void testRemoveAll(){
493	>	/**
494	>	* removeAll returns false
495	>	*/
496	>	public void testRemoveAll() {
497		SynchronousQueue q = new SynchronousQueue();
498		Integer[] empty = new Integer[0];
499	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
500	<	q.removeAll(Arrays.asList(ints));
330	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
499	>	assertFalse(q.removeAll(Arrays.asList(empty)));
500	>	Integer[] ints = new Integer[1]; ints[0] = zero;
501		assertFalse(q.containsAll(Arrays.asList(ints)));
502		}
503
504
505	<	public void testToArray(){
505	>	/**
506	>	* toArray is empty
507	>	*/
508	>	public void testToArray() {
509		SynchronousQueue q = new SynchronousQueue();
510	<	Object[] o = q.toArray();
510	>	Object[] o = q.toArray();
511		assertEquals(o.length, 0);
512		}
513
514	<	public void testToArray2(){
514	>	/**
515	>	* toArray(a) is nulled at position 0
516	>	*/
517	>	public void testToArray2() {
518		SynchronousQueue q = new SynchronousQueue();
519	<	Integer[] ints = new Integer[1];
519	>	Integer[] ints = new Integer[1];
520		assertNull(ints[0]);
521		}
522	<
523	<	public void testIterator(){
522	>
523	>	/**
524	>	* toArray(null) throws NPE
525	>	*/
526	>	public void testToArray_BadArg() {
527		SynchronousQueue q = new SynchronousQueue();
528	<	Iterator it = q.iterator();
528	>	try {
529	>	Object o[] = q.toArray(null);
530	>	shouldThrow();
531	>	} catch (NullPointerException success) {}
532	>	}
533	>
534	>
535	>	/**
536	>	* iterator does not traverse any elements
537	>	*/
538	>	public void testIterator() {
539	>	SynchronousQueue q = new SynchronousQueue();
540	>	Iterator it = q.iterator();
541		assertFalse(it.hasNext());
542		try {
543		Object x = it.next();
544	<	fail("should throw");
545	<	}
355	<	catch (NoSuchElementException success) {}
544	>	shouldThrow();
545	>	} catch (NoSuchElementException success) {}
546		}
547
548	<	public void testIteratorRemove(){
548	>	/**
549	>	* iterator remove throws ISE
550	>	*/
551	>	public void testIteratorRemove() {
552		SynchronousQueue q = new SynchronousQueue();
553	<	Iterator it = q.iterator();
553	>	Iterator it = q.iterator();
554		try {
555		it.remove();
556	<	fail("should throw");
557	<	}
365	<	catch (IllegalStateException success) {}
556	>	shouldThrow();
557	>	} catch (IllegalStateException success) {}
558		}
559
560	<	public void testToString(){
560	>	/**
561	>	* toString returns a non-null string
562	>	*/
563	>	public void testToString() {
564		SynchronousQueue q = new SynchronousQueue();
565		String s = q.toString();
566	<	assertTrue(s != null);
567	<	}
566	>	assertNotNull(s);
567	>	}
568
569
570	+	/**
571	+	* offer transfers elements across Executor tasks
572	+	*/
573		public void testOfferInExecutor() {
574		final SynchronousQueue q = new SynchronousQueue();
575		ExecutorService executor = Executors.newFixedThreadPool(2);
576		final Integer one = new Integer(1);
577
578	<	executor.execute(new Runnable() {
579	<	public void run() {
580	<	assertFalse(q.offer(one));
581	<	try {
582	<	assertTrue(q.offer(one, MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
583	<	assertEquals(0, q.remainingCapacity());
584	<	}
585	<	catch (InterruptedException e) {
586	<	fail("should not be interrupted");
587	<	}
588	<	}
589	<	});
590	<
591	<	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();
578	>	executor.execute(new CheckedRunnable() {
579	>	public void realRun() throws InterruptedException {
580	>	threadAssertFalse(q.offer(one));
581	>	threadAssertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
582	>	threadAssertEquals(0, q.remainingCapacity());
583	>	}});
584	>
585	>	executor.execute(new CheckedRunnable() {
586	>	public void realRun() throws InterruptedException {
587	>	Thread.sleep(SMALL_DELAY_MS);
588	>	threadAssertEquals(one, q.take());
589	>	}});
590	>
591	>	joinPool(executor);
592
593		}
594
595	+	/**
596	+	* poll retrieves elements across Executor threads
597	+	*/
598		public void testPollInExecutor() {
410	–
599		final SynchronousQueue q = new SynchronousQueue();
412	–
600		ExecutorService executor = Executors.newFixedThreadPool(2);
601	+	executor.execute(new CheckedRunnable() {
602	+	public void realRun() throws InterruptedException {
603	+	threadAssertNull(q.poll());
604	+	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
605	+	threadAssertTrue(q.isEmpty());
606	+	}});
607
608	<	executor.execute(new Runnable() {
609	<	public void run() {
610	<	assertNull(q.poll());
611	<	try {
612	<	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	<	});
608	>	executor.execute(new CheckedRunnable() {
609	>	public void realRun() throws InterruptedException {
610	>	Thread.sleep(SMALL_DELAY_MS);
611	>	q.put(new Integer(1));
612	>	}});
613
614	<	executor.execute(new Runnable() {
615	<	public void run() {
616	<	try {
617	<	Thread.sleep(MEDIUM_DELAY_MS);
618	<	q.put(new Integer(1));
619	<	}
620	<	catch (InterruptedException e) {
621	<	fail("should not be interrupted");
622	<	}
623	<	}
624	<	});
625	<
626	<	executor.shutdown();
614	>	joinPool(executor);
615	>	}
616	>
617	>	/**
618	>	* a deserialized serialized queue is usable
619	>	*/
620	>	public void testSerialization() throws Exception {
621	>	SynchronousQueue q = new SynchronousQueue();
622	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
623	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
624	>	out.writeObject(q);
625	>	out.close();
626	>
627	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
628	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
629	>	SynchronousQueue r = (SynchronousQueue)in.readObject();
630	>	assertEquals(q.size(), r.size());
631	>	while (!q.isEmpty())
632	>	assertEquals(q.remove(), r.remove());
633	>	}
634
635	+	/**
636	+	* drainTo(null) throws NPE
637	+	*/
638	+	public void testDrainToNull() {
639	+	SynchronousQueue q = new SynchronousQueue();
640	+	try {
641	+	q.drainTo(null);
642	+	shouldThrow();
643	+	} catch (NullPointerException success) {}
644	+	}
645	+
646	+	/**
647	+	* drainTo(this) throws IAE
648	+	*/
649	+	public void testDrainToSelf() {
650	+	SynchronousQueue q = new SynchronousQueue();
651	+	try {
652	+	q.drainTo(q);
653	+	shouldThrow();
654	+	} catch (IllegalArgumentException success) {}
655		}
656
657	<	public void testSerialization() {
658	<	SynchronousQueue q = new SynchronousQueue();
659	<	try {
660	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
661	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
662	<	out.writeObject(q);
663	<	out.close();
664	<
665	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
666	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
667	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
668	<	assertEquals(q.size(), r.size());
669	<	while (!q.isEmpty())
670	<	assertEquals(q.remove(), r.remove());
671	<	} catch(Exception e){
672	<	fail("unexpected exception");
673	<	}
657	>	/**
658	>	* drainTo(c) of empty queue doesn't transfer elements
659	>	*/
660	>	public void testDrainTo() {
661	>	SynchronousQueue q = new SynchronousQueue();
662	>	ArrayList l = new ArrayList();
663	>	q.drainTo(l);
664	>	assertEquals(q.size(), 0);
665	>	assertEquals(l.size(), 0);
666	>	}
667	>
668	>	/**
669	>	* drainTo empties queue, unblocking a waiting put.
670	>	*/
671	>	public void testDrainToWithActivePut() throws InterruptedException {
672	>	final SynchronousQueue q = new SynchronousQueue();
673	>	Thread t = new Thread(new CheckedRunnable() {
674	>	public void realRun() throws InterruptedException {
675	>	q.put(new Integer(1));
676	>	}});
677	>
678	>	t.start();
679	>	ArrayList l = new ArrayList();
680	>	Thread.sleep(SHORT_DELAY_MS);
681	>	q.drainTo(l);
682	>	assertTrue(l.size() <= 1);
683	>	if (l.size() > 0)
684	>	assertEquals(l.get(0), new Integer(1));
685	>	t.join();
686	>	assertTrue(l.size() <= 1);
687	>	}
688	>
689	>	/**
690	>	* drainTo(null, n) throws NPE
691	>	*/
692	>	public void testDrainToNullN() {
693	>	SynchronousQueue q = new SynchronousQueue();
694	>	try {
695	>	q.drainTo(null, 0);
696	>	shouldThrow();
697	>	} catch (NullPointerException success) {}
698	>	}
699	>
700	>	/**
701	>	* drainTo(this, n) throws IAE
702	>	*/
703	>	public void testDrainToSelfN() {
704	>	SynchronousQueue q = new SynchronousQueue();
705	>	try {
706	>	q.drainTo(q, 0);
707	>	shouldThrow();
708	>	} catch (IllegalArgumentException success) {}
709	>	}
710	>
711	>	/**
712	>	* drainTo(c, n) empties up to n elements of queue into c
713	>	*/
714	>	public void testDrainToN() throws InterruptedException {
715	>	final SynchronousQueue q = new SynchronousQueue();
716	>	Thread t1 = new Thread(new CheckedRunnable() {
717	>	public void realRun() throws InterruptedException {
718	>	q.put(one);
719	>	}});
720	>
721	>	Thread t2 = new Thread(new CheckedRunnable() {
722	>	public void realRun() throws InterruptedException {
723	>	q.put(two);
724	>	}});
725	>
726	>	t1.start();
727	>	t2.start();
728	>	ArrayList l = new ArrayList();
729	>	Thread.sleep(SHORT_DELAY_MS);
730	>	q.drainTo(l, 1);
731	>	assertTrue(l.size() == 1);
732	>	q.drainTo(l, 1);
733	>	assertTrue(l.size() == 2);
734	>	assertTrue(l.contains(one));
735	>	assertTrue(l.contains(two));
736	>	t1.join();
737	>	t2.join();
738		}
739
740		}

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