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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 1.32 by jsr166, Thu Apr 14 22:55:08 2011 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/publicdomain/zero/1.0/
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 {
15	>	public class SynchronousQueueTest extends JSR166TestCase {
16
17	<	private final static int N = 1;
18	<	private static long SHORT_DELAY_MS = 100;
19	<	private static long MEDIUM_DELAY_MS = 1000;
20	<	private static long LONG_DELAY_MS = 10000;
17	>	public static class Fair extends BlockingQueueTest {
18	>	protected BlockingQueue emptyCollection() {
19	>	return new SynchronousQueue(true);
20	>	}
21	>	}
22	>
23	>	public static class NonFair extends BlockingQueueTest {
24	>	protected BlockingQueue emptyCollection() {
25	>	return new SynchronousQueue(false);
26	>	}
27	>	}
28
29		public static void main(String[] args) {
30	<	junit.textui.TestRunner.run (suite());
30	>	junit.textui.TestRunner.run(suite());
31		}
32
33		public static Test suite() {
34	<	return new TestSuite(SynchronousQueueTest.class);
34	>	return newTestSuite(SynchronousQueueTest.class,
35	>	new Fair().testSuite(),
36	>	new NonFair().testSuite());
37		}
38
39	<	public void testEmptyFull() {
40	<	SynchronousQueue q = new SynchronousQueue();
39	>	/**
40	>	* Any SynchronousQueue is both empty and full
41	>	*/
42	>	public void testEmptyFull(SynchronousQueue q) {
43		assertTrue(q.isEmpty());
44	<	assertEquals(0, q.size());
44	>	assertEquals(0, q.size());
45		assertEquals(0, q.remainingCapacity());
46	<	assertFalse(q.offer(new Integer(3)));
46	>	assertFalse(q.offer(zero));
47		}
48
49	<	public void testOfferNull(){
50	<	try {
49	>	/**
50	>	* A non-fair SynchronousQueue is both empty and full
51	>	*/
52	>	public void testEmptyFull() {
53	>	testEmptyFull(new SynchronousQueue());
54	>	}
55	>
56	>	/**
57	>	* A fair SynchronousQueue is both empty and full
58	>	*/
59	>	public void testFairEmptyFull() {
60	>	testEmptyFull(new SynchronousQueue(true));
61	>	}
62	>
63	>	/**
64	>	* offer(null) throws NPE
65	>	*/
66	>	public void testOfferNull() {
67	>	try {
68		SynchronousQueue q = new SynchronousQueue();
69		q.offer(null);
70	<	fail("should throw NPE");
71	<	} catch (NullPointerException success) { }
70	>	shouldThrow();
71	>	} catch (NullPointerException success) {}
72	>	}
73	>
74	>	/**
75	>	* add(null) throws NPE
76	>	*/
77	>	public void testAddNull() {
78	>	try {
79	>	SynchronousQueue q = new SynchronousQueue();
80	>	q.add(null);
81	>	shouldThrow();
82	>	} catch (NullPointerException success) {}
83		}
84
85	<	public void testOffer(){
85	>	/**
86	>	* offer fails if no active taker
87	>	*/
88	>	public void testOffer() {
89		SynchronousQueue q = new SynchronousQueue();
90	<	assertFalse(q.offer(new Integer(1)));
90	>	assertFalse(q.offer(one));
91		}
92
93	<	public void testAdd(){
94	<	try {
93	>	/**
94	>	* add throws ISE if no active taker
95	>	*/
96	>	public void testAdd() {
97	>	try {
98		SynchronousQueue q = new SynchronousQueue();
99		assertEquals(0, q.remainingCapacity());
100	<	q.add(new Integer(0));
101	<	} catch (IllegalStateException success){
102	<	}
100	>	q.add(one);
101	>	shouldThrow();
102	>	} catch (IllegalStateException success) {}
103		}
104
105	<	public void testAddAll1(){
105	>	/**
106	>	* addAll(null) throws NPE
107	>	*/
108	>	public void testAddAll1() {
109		try {
110		SynchronousQueue q = new SynchronousQueue();
111		q.addAll(null);
112	<	fail("Cannot add null collection");
113	<	}
114	<	catch (NullPointerException success) {}
112	>	shouldThrow();
113	>	} catch (NullPointerException success) {}
114	>	}
115	>
116	>	/**
117	>	* addAll(this) throws IAE
118	>	*/
119	>	public void testAddAllSelf() {
120	>	try {
121	>	SynchronousQueue q = new SynchronousQueue();
122	>	q.addAll(q);
123	>	shouldThrow();
124	>	} catch (IllegalArgumentException success) {}
125		}
126	<	public void testAddAll2(){
126	>
127	>	/**
128	>	* addAll of a collection with null elements throws NPE
129	>	*/
130	>	public void testAddAll2() {
131		try {
132		SynchronousQueue q = new SynchronousQueue();
133	<	Integer[] ints = new Integer[N];
133	>	Integer[] ints = new Integer[1];
134		q.addAll(Arrays.asList(ints));
135	<	fail("Cannot add null elements");
136	<	}
73	<	catch (NullPointerException success) {}
135	>	shouldThrow();
136	>	} catch (NullPointerException success) {}
137		}
138	<	public void testAddAll4(){
138	>
139	>	/**
140	>	* addAll throws ISE if no active taker
141	>	*/
142	>	public void testAddAll4() {
143		try {
144		SynchronousQueue q = new SynchronousQueue();
145	<	Integer[] ints = new Integer[N];
146	<	for (int i = 0; i < N; ++i)
145	>	Integer[] ints = new Integer[1];
146	>	for (int i = 0; i < 1; ++i)
147		ints[i] = new Integer(i);
148		q.addAll(Arrays.asList(ints));
149	<	fail("Cannot add with insufficient capacity");
150	<	}
84	<	catch (IllegalStateException success) {}
149	>	shouldThrow();
150	>	} catch (IllegalStateException success) {}
151		}
152
153	<	public void testPutNull() {
154	<	try {
153	>	/**
154	>	* put(null) throws NPE
155	>	*/
156	>	public void testPutNull() throws InterruptedException {
157	>	try {
158		SynchronousQueue q = new SynchronousQueue();
159		q.put(null);
160	<	fail("put should throw NPE");
161	<	}
162	<	catch (NullPointerException success){
163	<	}
164	<	catch (InterruptedException ie) {
165	<	fail("Unexpected exception");
166	<	}
167	<	}
160	>	shouldThrow();
161	>	} catch (NullPointerException success) {}
162	>	}
163	>
164	>	/**
165	>	* put blocks interruptibly if no active taker
166	>	*/
167	>	public void testBlockingPut() throws InterruptedException {
168	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
169	>	public void realRun() throws InterruptedException {
170	>	SynchronousQueue q = new SynchronousQueue();
171	>	q.put(zero);
172	>	}});
173
100	–	public void testBlockingPut(){
101	–	Thread t = new Thread(new Runnable() {
102	–	public void run() {
103	–	try {
104	–	SynchronousQueue q = new SynchronousQueue();
105	–	q.put(new Integer(0));
106	–	fail("put should block");
107	–	} catch (InterruptedException ie){
108	–	}
109	–	}});
174		t.start();
175	<	try {
176	<	Thread.sleep(SHORT_DELAY_MS);
177	<	t.interrupt();
114	<	t.join();
115	<	}
116	<	catch (InterruptedException ie) {
117	<	fail("Unexpected exception");
118	<	}
175	>	Thread.sleep(SHORT_DELAY_MS);
176	>	t.interrupt();
177	>	t.join();
178		}
179
180	<	public void testPutWithTake() {
180	>	/**
181	>	* put blocks waiting for take
182	>	*/
183	>	public void testPutWithTake() throws InterruptedException {
184		final SynchronousQueue q = new SynchronousQueue();
185	<	Thread t = new Thread(new Runnable() {
186	<	public void run(){
187	<	int added = 0;
188	<	try {
189	<	q.put(new Object());
190	<	++added;
129	<	q.put(new Object());
130	<	++added;
131	<	q.put(new Object());
132	<	++added;
133	<	q.put(new Object());
185	>	Thread t = new Thread(new CheckedRunnable() {
186	>	public void realRun() throws InterruptedException {
187	>	int added = 0;
188	>	try {
189	>	while (true) {
190	>	q.put(added);
191		++added;
135	–	fail("Should block");
136	–	} catch (InterruptedException e){
137	–	assertTrue(added >= 1);
192		}
193	+	} catch (InterruptedException success) {
194	+	assertEquals(1, added);
195		}
196	<	});
197	<	try {
198	<	t.start();
199	<	Thread.sleep(SHORT_DELAY_MS);
200	<	q.take();
201	<	Thread.sleep(SHORT_DELAY_MS);
202	<	t.interrupt();
203	<	t.join();
204	<	} catch (Exception e){
205	<	fail("Unexpected exception");
206	<	}
196	>	}});
197	>
198	>	t.start();
199	>	Thread.sleep(SHORT_DELAY_MS);
200	>	assertEquals(0, q.take());
201	>	Thread.sleep(SHORT_DELAY_MS);
202	>	t.interrupt();
203	>	t.join();
204	>	}
205	>
206	>	/**
207	>	* timed offer times out if elements not taken
208	>	*/
209	>	public void testTimedOffer(final SynchronousQueue q)
210	>	throws InterruptedException {
211	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
212	>	Thread t = newStartedThread(new CheckedRunnable() {
213	>	public void realRun() throws InterruptedException {
214	>	long t0 = System.nanoTime();
215	>	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
216	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
217	>	pleaseInterrupt.countDown();
218	>	t0 = System.nanoTime();
219	>	try {
220	>	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
221	>	shouldThrow();
222	>	} catch (InterruptedException success) {}
223	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
224	>	}});
225	>
226	>	assertTrue(pleaseInterrupt.await(MEDIUM_DELAY_MS, MILLISECONDS));
227	>	t.interrupt();
228	>	awaitTermination(t, MEDIUM_DELAY_MS);
229	>	}
230	>
231	>	/**
232	>	* timed offer times out if elements not taken
233	>	*/
234	>	public void testTimedOffer() throws InterruptedException {
235	>	testTimedOffer(new SynchronousQueue());
236	>	}
237	>
238	>	/**
239	>	* timed offer times out if elements not taken
240	>	*/
241	>	public void testFairTimedOffer() throws InterruptedException {
242	>	testTimedOffer(new SynchronousQueue(true));
243	>	}
244	>
245	>	/**
246	>	* put blocks interruptibly if no active taker
247	>	*/
248	>	public void testFairBlockingPut() throws InterruptedException {
249	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
250	>	public void realRun() throws InterruptedException {
251	>	SynchronousQueue q = new SynchronousQueue(true);
252	>	q.put(zero);
253	>	}});
254	>
255	>	t.start();
256	>	Thread.sleep(SHORT_DELAY_MS);
257	>	t.interrupt();
258	>	t.join();
259		}
260
261	<	public void testTimedOffer() {
262	<	final SynchronousQueue q = new SynchronousQueue();
263	<	Thread t = new Thread(new Runnable() {
264	<	public void run(){
265	<	try {
266	<
267	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
268	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
269	<	fail("Should block");
270	<	} catch (InterruptedException success){}
261	>	/**
262	>	* put blocks waiting for take
263	>	*/
264	>	public void testFairPutWithTake() throws InterruptedException {
265	>	final SynchronousQueue q = new SynchronousQueue(true);
266	>	Thread t = new Thread(new CheckedRunnable() {
267	>	public void realRun() throws InterruptedException {
268	>	int added = 0;
269	>	try {
270	>	while (true) {
271	>	q.put(added);
272	>	++added;
273	>	}
274	>	} catch (InterruptedException success) {
275	>	assertEquals(1, added);
276		}
277	<	});
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	<	}
174	<	}
277	>	}});
278
279	+	t.start();
280	+	Thread.sleep(SHORT_DELAY_MS);
281	+	assertEquals(0, q.take());
282	+	Thread.sleep(SHORT_DELAY_MS);
283	+	t.interrupt();
284	+	t.join();
285	+	}
286	+
287	+	/**
288	+	* take blocks interruptibly when empty
289	+	*/
290	+	public void testFairTakeFromEmpty() throws InterruptedException {
291	+	final SynchronousQueue q = new SynchronousQueue(true);
292	+	Thread t = new Thread(new CheckedInterruptedRunnable() {
293	+	public void realRun() throws InterruptedException {
294	+	q.take();
295	+	}});
296
297	<	public void testTakeFromEmpty() {
298	<	final SynchronousQueue q = new SynchronousQueue();
299	<	Thread t = new Thread(new Runnable() {
300	<	public void run(){
181	<	try {
182	<	q.take();
183	<	fail("Should block");
184	<	} catch (InterruptedException success){ }
185	<	}
186	<	});
187	<	try {
188	<	t.start();
189	<	Thread.sleep(SHORT_DELAY_MS);
190	<	t.interrupt();
191	<	t.join();
192	<	} catch (Exception e){
193	<	fail("Unexpected exception");
194	<	}
297	>	t.start();
298	>	Thread.sleep(SHORT_DELAY_MS);
299	>	t.interrupt();
300	>	t.join();
301		}
302
303	<	public void testPoll(){
303	>	/**
304	>	* poll return null if no active putter
305	>	*/
306	>	public void testPoll() {
307		SynchronousQueue q = new SynchronousQueue();
308	<	assertNull(q.poll());
308	>	assertNull(q.poll());
309		}
310
311	<	public void testTimedPoll0() {
312	<	try {
313	<	SynchronousQueue q = new SynchronousQueue();
314	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
315	<	} catch (InterruptedException e){
316	<	fail("Unexpected exception");
208	<	}
311	>	/**
312	>	* timed poll with zero timeout times out if no active putter
313	>	*/
314	>	public void testTimedPoll0() throws InterruptedException {
315	>	SynchronousQueue q = new SynchronousQueue();
316	>	assertNull(q.poll(0, MILLISECONDS));
317		}
318
319	<	public void testTimedPoll() {
320	<	try {
321	<	SynchronousQueue q = new SynchronousQueue();
322	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
323	<	} catch (InterruptedException e){
324	<	fail("Unexpected exception");
325	<	}
319	>	/**
320	>	* timed poll with nonzero timeout times out if no active putter
321	>	*/
322	>	public void testTimedPoll() throws InterruptedException {
323	>	SynchronousQueue q = new SynchronousQueue();
324	>	long t0 = System.nanoTime();
325	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
326	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
327		}
328
329	<	public void testInterruptedTimedPoll(){
330	<	Thread t = new Thread(new Runnable() {
331	<	public void run() {
332	<	try {
333	<	SynchronousQueue q = new SynchronousQueue();
334	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
335	<	} catch (InterruptedException success){
336	<	}
337	<	}});
338	<	t.start();
339	<	try {
340	<	Thread.sleep(SHORT_DELAY_MS);
341	<	t.interrupt();
342	<	t.join();
343	<	}
344	<	catch (InterruptedException ie) {
345	<	fail("Unexpected exception");
346	<	}
347	<	}
329	>	/**
330	>	* Interrupted timed poll throws InterruptedException instead of
331	>	* returning timeout status
332	>	*/
333	>	public void testInterruptedTimedPoll(final SynchronousQueue q)
334	>	throws InterruptedException {
335	>	final CountDownLatch threadStarted = new CountDownLatch(1);
336	>	Thread t = newStartedThread(new CheckedRunnable() {
337	>	public void realRun() throws InterruptedException {
338	>	long t0 = System.nanoTime();
339	>	threadStarted.countDown();
340	>	try {
341	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
342	>	shouldThrow();
343	>	} catch (InterruptedException success) {}
344	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
345	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
346	>	}});
347	>
348	>	threadStarted.await();
349	>	Thread.sleep(SHORT_DELAY_MS);
350	>	t.interrupt();
351	>	awaitTermination(t, MEDIUM_DELAY_MS);
352	>	}
353	>
354	>	/**
355	>	* Interrupted timed poll throws InterruptedException instead of
356	>	* returning timeout status
357	>	*/
358	>	public void testInterruptedTimedPoll() throws InterruptedException {
359	>	testInterruptedTimedPoll(new SynchronousQueue());
360	>	}
361	>
362	>	/**
363	>	* Interrupted timed poll throws InterruptedException instead of
364	>	* returning timeout status
365	>	*/
366	>	public void testFairInterruptedTimedPoll() throws InterruptedException {
367	>	testInterruptedTimedPoll(new SynchronousQueue(true));
368	>	}
369	>
370	>	/**
371	>	* timed poll before a delayed offer times out, returning null;
372	>	* after offer succeeds; on interruption throws
373	>	*/
374	>	public void testFairTimedPollWithOffer() throws InterruptedException {
375	>	final SynchronousQueue q = new SynchronousQueue(true);
376	>	final CountDownLatch pleaseOffer = new CountDownLatch(1);
377	>	Thread t = newStartedThread(new CheckedRunnable() {
378	>	public void realRun() throws InterruptedException {
379	>	long t0 = System.nanoTime();
380	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
381	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
382	>
383	>	pleaseOffer.countDown();
384	>	t0 = System.nanoTime();
385	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
386	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
387
388	<	public void testTimedPollWithOffer(){
389	<	final SynchronousQueue q = new SynchronousQueue();
390	<	Thread t = new Thread(new Runnable() {
391	<	public void run(){
392	<	try {
393	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
394	<	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	<	}
388	>	t0 = System.nanoTime();
389	>	try {
390	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
391	>	shouldThrow();
392	>	} catch (InterruptedException success) {}
393	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
394	>	}});
395
396	+	assertTrue(pleaseOffer.await(MEDIUM_DELAY_MS, MILLISECONDS));
397	+	long t0 = System.nanoTime();
398	+	assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS));
399	+	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
400
401	<	public void testPeek(){
401	>	t.interrupt();
402	>	awaitTermination(t, MEDIUM_DELAY_MS);
403	>	}
404	>
405	>	/**
406	>	* peek() returns null if no active putter
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 if no active putter
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 putter
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	<	Iterator it = q.iterator();
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();
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	<	public void testSerialization() {
677	>	/**
678	>	* drainTo(null, n) throws NPE
679	>	*/
680	>	public void testDrainToNullN() {
681		SynchronousQueue q = new SynchronousQueue();
682		try {
683	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
684	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
685	<	out.writeObject(q);
686	<	out.close();
683	>	q.drainTo(null, 0);
684	>	shouldThrow();
685	>	} catch (NullPointerException success) {}
686	>	}
687
688	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
689	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
690	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
691	<	assertEquals(q.size(), r.size());
692	<	while (!q.isEmpty())
693	<	assertEquals(q.remove(), r.remove());
694	<	} catch(Exception e){
695	<	fail("unexpected exception");
696	<	}
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	>	/**
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	>	assertEquals(1, l.size());
720	>	q.drainTo(l, 1);
721	>	assertEquals(2, l.size());
722	>	assertTrue(l.contains(one));
723	>	assertTrue(l.contains(two));
724	>	t1.join();
725	>	t2.join();
726		}
727
728		}

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