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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 1.21 by jsr166, Wed Aug 25 00:07:03 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 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;
129	<	q.put(new Object());
130	<	++added;
131	<	q.put(new Object());
132	<	++added;
133	<	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;
135	–	fail("Should block");
136	–	} catch (InterruptedException e){
137	–	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();
148	<	} catch (Exception e){
149	<	fail("Unexpected exception");
150	<	}
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	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
199	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
200	<	fail("Should block");
201	<	} catch (InterruptedException success){}
202	<	}
203	<	});
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	<	}
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	<	fail("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	>
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	<	public void testPoll(){
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");
208	<	}
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");
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	<	}
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	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
334	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
335	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
336	<	fail("Should block");
337	<	} catch (InterruptedException success) { }
338	<	}
339	<	});
340	<	try {
341	<	t.start();
342	<	Thread.sleep(SHORT_DELAY_MS * 2);
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	<	}
275	<	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){
284	<	}
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	<	for (int i = 1; i < N; i+=2) {
290	<	assertFalse(q.remove(new Integer(i)));
291	<	}
440	>	assertFalse(q.remove(zero));
441		assertTrue(q.isEmpty());
442		}
443	<
444	<	public void testContains(){
445	<	SynchronousQueue q = new SynchronousQueue();
446	<	for (int i = 0; i < N; ++i) {
447	<	assertFalse(q.contains(new Integer(i)));
448	<	}
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)));
322	<	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));
330	<	//        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	<	}
355	<	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	<	}
365	<	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);
378	–	final Integer one = new Integer(1);
566
567	<	executor.execute(new Runnable() {
568	<	public void run() {
567	>	executor.execute(new CheckedRunnable() {
568	>	public void realRun() throws InterruptedException {
569		assertFalse(q.offer(one));
570	<	try {
571	<	assertTrue(q.offer(one, MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
572	<	assertEquals(0, q.remainingCapacity());
573	<	}
574	<	catch (InterruptedException e) {
575	<	fail("should not be interrupted");
576	<	}
577	<	}
578	<	});
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	>
580	>	joinPool(executor);
581	>	}
582	>
583	>	/**
584	>	* poll retrieves elements across Executor threads
585	>	*/
586	>	public void testPollInExecutor() {
587	>	final SynchronousQueue q = new SynchronousQueue();
588	>	ExecutorService executor = Executors.newFixedThreadPool(2);
589	>	executor.execute(new CheckedRunnable() {
590	>	public void realRun() throws InterruptedException {
591	>	assertNull(q.poll());
592	>	assertSame(one, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
593	>	assertTrue(q.isEmpty());
594	>	}});
595
596	<	executor.execute(new Runnable() {
597	<	public void run() {
598	<	try {
599	<	Thread.sleep(MEDIUM_DELAY_MS);
600	<	assertEquals(one, q.take());
398	<	}
399	<	catch (InterruptedException e) {
400	<	fail("should not be interrupted");
401	<	}
402	<	}
403	<	});
404	<
405	<	executor.shutdown();
596	>	executor.execute(new CheckedRunnable() {
597	>	public void realRun() throws InterruptedException {
598	>	Thread.sleep(SHORT_DELAY_MS);
599	>	q.put(one);
600	>	}});
601
602	+	joinPool(executor);
603		}
604
605	<	public void testPollInExecutor() {
605	>	/**
606	>	* a deserialized serialized queue is usable
607	>	*/
608	>	public void testSerialization() throws Exception {
609	>	SynchronousQueue q = new SynchronousQueue();
610	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
611	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
612	>	out.writeObject(q);
613	>	out.close();
614
615	<	final SynchronousQueue q = new SynchronousQueue();
615	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
616	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
617	>	SynchronousQueue r = (SynchronousQueue)in.readObject();
618	>	assertEquals(q.size(), r.size());
619	>	while (!q.isEmpty())
620	>	assertEquals(q.remove(), r.remove());
621	>	}
622
623	<	ExecutorService executor = Executors.newFixedThreadPool(2);
623	>	/**
624	>	* drainTo(null) throws NPE
625	>	*/
626	>	public void testDrainToNull() {
627	>	SynchronousQueue q = new SynchronousQueue();
628	>	try {
629	>	q.drainTo(null);
630	>	shouldThrow();
631	>	} catch (NullPointerException success) {}
632	>	}
633
634	<	executor.execute(new Runnable() {
635	<	public void run() {
636	<	assertNull(q.poll());
637	<	try {
638	<	assertTrue(null != q.poll(MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
639	<	assertTrue(q.isEmpty());
640	<	}
641	<	catch (InterruptedException e) {
642	<	fail("should not be interrupted");
643	<	}
425	<	}
426	<	});
634	>	/**
635	>	* drainTo(this) throws IAE
636	>	*/
637	>	public void testDrainToSelf() {
638	>	SynchronousQueue q = new SynchronousQueue();
639	>	try {
640	>	q.drainTo(q);
641	>	shouldThrow();
642	>	} catch (IllegalArgumentException success) {}
643	>	}
644
645	<	executor.execute(new Runnable() {
646	<	public void run() {
647	<	try {
648	<	Thread.sleep(MEDIUM_DELAY_MS);
649	<	q.put(new Integer(1));
650	<	}
651	<	catch (InterruptedException e) {
652	<	fail("should not be interrupted");
653	<	}
654	<	}
655	<	});
656	<
657	<	executor.shutdown();
645	>	/**
646	>	* drainTo(c) of empty queue doesn't transfer elements
647	>	*/
648	>	public void testDrainTo() {
649	>	SynchronousQueue q = new SynchronousQueue();
650	>	ArrayList l = new ArrayList();
651	>	q.drainTo(l);
652	>	assertEquals(q.size(), 0);
653	>	assertEquals(l.size(), 0);
654	>	}
655	>
656	>	/**
657	>	* drainTo empties queue, unblocking a waiting put.
658	>	*/
659	>	public void testDrainToWithActivePut() throws InterruptedException {
660	>	final SynchronousQueue q = new SynchronousQueue();
661	>	Thread t = new Thread(new CheckedRunnable() {
662	>	public void realRun() throws InterruptedException {
663	>	q.put(new Integer(1));
664	>	}});
665	>
666	>	t.start();
667	>	ArrayList l = new ArrayList();
668	>	Thread.sleep(SHORT_DELAY_MS);
669	>	q.drainTo(l);
670	>	assertTrue(l.size() <= 1);
671	>	if (l.size() > 0)
672	>	assertEquals(l.get(0), new Integer(1));
673	>	t.join();
674	>	assertTrue(l.size() <= 1);
675	>	}
676	>
677	>	/**
678	>	* drainTo(null, n) throws NPE
679	>	*/
680	>	public void testDrainToNullN() {
681	>	SynchronousQueue q = new SynchronousQueue();
682	>	try {
683	>	q.drainTo(null, 0);
684	>	shouldThrow();
685	>	} catch (NullPointerException success) {}
686	>	}
687
688	+	/**
689	+	* drainTo(this, n) throws IAE
690	+	*/
691	+	public void testDrainToSelfN() {
692	+	SynchronousQueue q = new SynchronousQueue();
693	+	try {
694	+	q.drainTo(q, 0);
695	+	shouldThrow();
696	+	} catch (IllegalArgumentException success) {}
697		}
698
699	<	public void testSerialization() {
700	<	SynchronousQueue q = new SynchronousQueue();
701	<	try {
702	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
703	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
704	<	out.writeObject(q);
705	<	out.close();
706	<
707	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
708	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
709	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
710	<	assertEquals(q.size(), r.size());
711	<	while (!q.isEmpty())
712	<	assertEquals(q.remove(), r.remove());
713	<	} catch(Exception e){
714	<	fail("unexpected exception");
715	<	}
699	>	/**
700	>	* drainTo(c, n) empties up to n elements of queue into c
701	>	*/
702	>	public void testDrainToN() throws InterruptedException {
703	>	final SynchronousQueue q = new SynchronousQueue();
704	>	Thread t1 = new Thread(new CheckedRunnable() {
705	>	public void realRun() throws InterruptedException {
706	>	q.put(one);
707	>	}});
708	>
709	>	Thread t2 = new Thread(new CheckedRunnable() {
710	>	public void realRun() throws InterruptedException {
711	>	q.put(two);
712	>	}});
713	>
714	>	t1.start();
715	>	t2.start();
716	>	ArrayList l = new ArrayList();
717	>	Thread.sleep(SHORT_DELAY_MS);
718	>	q.drainTo(l, 1);
719	>	assertTrue(l.size() == 1);
720	>	q.drainTo(l, 1);
721	>	assertTrue(l.size() == 2);
722	>	assertTrue(l.contains(one));
723	>	assertTrue(l.contains(two));
724	>	t1.join();
725	>	t2.join();
726		}
727
728		}

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