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Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:08 2003 UTC vs.
Revision 1.43 by jsr166, Wed Dec 31 16:44:02 2014 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 java.io.*;
10	>	import java.util.Arrays;
11	>	import java.util.ArrayList;
12	>	import java.util.Collection;
13	>	import java.util.Iterator;
14	>	import java.util.NoSuchElementException;
15	>	import java.util.concurrent.BlockingQueue;
16	>	import java.util.concurrent.CountDownLatch;
17	>	import java.util.concurrent.Executors;
18	>	import java.util.concurrent.ExecutorService;
19	>	import java.util.concurrent.SynchronousQueue;
20	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
21
22		public class SynchronousQueueTest extends JSR166TestCase {
23
24	<	public static void main(String[] args) {
25	<	junit.textui.TestRunner.run (suite());
24	>	public static class Fair extends BlockingQueueTest {
25	>	protected BlockingQueue emptyCollection() {
26	>	return new SynchronousQueue(true);
27	>	}
28		}
29
30	<	public static Test suite() {
31	<	return new TestSuite(SynchronousQueueTest.class);
30	>	public static class NonFair extends BlockingQueueTest {
31	>	protected BlockingQueue emptyCollection() {
32	>	return new SynchronousQueue(false);
33	>	}
34		}
35
36	<	/**
37	<	*
25	<	*/
26	<	public void testEmptyFull() {
27	<	SynchronousQueue q = new SynchronousQueue();
28	<	assertTrue(q.isEmpty());
29	<	assertEquals(0, q.size());
30	<	assertEquals(0, q.remainingCapacity());
31	<	assertFalse(q.offer(new Integer(3)));
36	>	public static void main(String[] args) {
37	>	junit.textui.TestRunner.run(suite());
38		}
39
40	<	/**
41	<	*
42	<	*/
43	<	public void testOfferNull() {
38	<	try {
39	<	SynchronousQueue q = new SynchronousQueue();
40	<	q.offer(null);
41	<	shouldThrow();
42	<	} catch (NullPointerException success) { }
40	>	public static Test suite() {
41	>	return newTestSuite(SynchronousQueueTest.class,
42	>	new Fair().testSuite(),
43	>	new NonFair().testSuite());
44		}
45
46		/**
47	<	*
47	>	* Any SynchronousQueue is both empty and full
48		*/
49	<	public void testOffer() {
50	<	SynchronousQueue q = new SynchronousQueue();
51	<	assertFalse(q.offer(new Integer(1)));
49	>	public void testEmptyFull()      { testEmptyFull(false); }
50	>	public void testEmptyFull_fair() { testEmptyFull(true); }
51	>	public void testEmptyFull(boolean fair) {
52	>	final SynchronousQueue q = new SynchronousQueue(fair);
53	>	assertTrue(q.isEmpty());
54	>	assertEquals(0, q.size());
55	>	assertEquals(0, q.remainingCapacity());
56	>	assertFalse(q.offer(zero));
57		}
58
59		/**
60	<	*
60	>	* offer fails if no active taker
61		*/
62	<	public void testAdd() {
63	<	try {
64	<	SynchronousQueue q = new SynchronousQueue();
65	<	assertEquals(0, q.remainingCapacity());
66	<	q.add(new Integer(0));
61	<	} catch (IllegalStateException success){
62	<	}
62	>	public void testOffer()      { testOffer(false); }
63	>	public void testOffer_fair() { testOffer(true); }
64	>	public void testOffer(boolean fair) {
65	>	SynchronousQueue q = new SynchronousQueue(fair);
66	>	assertFalse(q.offer(one));
67		}
68
69		/**
70	<	*
70	>	* add throws IllegalStateException if no active taker
71		*/
72	<	public void testAddAll1() {
72	>	public void testAdd()      { testAdd(false); }
73	>	public void testAdd_fair() { testAdd(true); }
74	>	public void testAdd(boolean fair) {
75	>	SynchronousQueue q = new SynchronousQueue(fair);
76	>	assertEquals(0, q.remainingCapacity());
77		try {
78	<	SynchronousQueue q = new SynchronousQueue();
71	<	q.addAll(null);
78	>	q.add(one);
79		shouldThrow();
80	<	}
74	<	catch (NullPointerException success) {}
80	>	} catch (IllegalStateException success) {}
81		}
82	+
83		/**
84	<	*
84	>	* addAll(this) throws IllegalArgumentException
85		*/
86	<	public void testAddAll2() {
86	>	public void testAddAll_self()      { testAddAll_self(false); }
87	>	public void testAddAll_self_fair() { testAddAll_self(true); }
88	>	public void testAddAll_self(boolean fair) {
89	>	SynchronousQueue q = new SynchronousQueue(fair);
90		try {
91	<	SynchronousQueue q = new SynchronousQueue();
82	<	Integer[] ints = new Integer[1];
83	<	q.addAll(Arrays.asList(ints));
91	>	q.addAll(q);
92		shouldThrow();
93	<	}
86	<	catch (NullPointerException success) {}
93	>	} catch (IllegalArgumentException success) {}
94		}
95	+
96		/**
97	<	*
97	>	* addAll throws ISE if no active taker
98		*/
99	<	public void testAddAll4() {
99	>	public void testAddAll_ISE()      { testAddAll_ISE(false); }
100	>	public void testAddAll_ISE_fair() { testAddAll_ISE(true); }
101	>	public void testAddAll_ISE(boolean fair) {
102	>	SynchronousQueue q = new SynchronousQueue(fair);
103	>	Integer[] ints = new Integer[1];
104	>	for (int i = 0; i < ints.length; i++)
105	>	ints[i] = i;
106	>	Collection<Integer> coll = Arrays.asList(ints);
107		try {
108	<	SynchronousQueue q = new SynchronousQueue();
94	<	Integer[] ints = new Integer[1];
95	<	for (int i = 0; i < 1; ++i)
96	<	ints[i] = new Integer(i);
97	<	q.addAll(Arrays.asList(ints));
108	>	q.addAll(coll);
109		shouldThrow();
110	<	}
100	<	catch (IllegalStateException success) {}
110	>	} catch (IllegalStateException success) {}
111		}
112
113		/**
114	<	*
114	>	* put blocks interruptibly if no active taker
115		*/
116	<	public void testPutNull() {
117	<	try {
118	<	SynchronousQueue q = new SynchronousQueue();
119	<	q.put(null);
120	<	shouldThrow();
121	<	}
122	<	catch (NullPointerException success){
123	<	}
124	<	catch (InterruptedException ie) {
125	<	unexpectedException();
126	<	}
127	<	}
116	>	public void testBlockingPut()      { testBlockingPut(false); }
117	>	public void testBlockingPut_fair() { testBlockingPut(true); }
118	>	public void testBlockingPut(boolean fair) {
119	>	final SynchronousQueue q = new SynchronousQueue(fair);
120	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
121	>	Thread t = newStartedThread(new CheckedRunnable() {
122	>	public void realRun() throws InterruptedException {
123	>	Thread.currentThread().interrupt();
124	>	try {
125	>	q.put(99);
126	>	shouldThrow();
127	>	} catch (InterruptedException success) {}
128	>	assertFalse(Thread.interrupted());
129
130	<	/**
131	<	*
132	<	*/
133	<	public void testBlockingPut() {
134	<	Thread t = new Thread(new Runnable() {
135	<	public void run() {
136	<	try {
137	<	SynchronousQueue q = new SynchronousQueue();
138	<	q.put(new Integer(0));
139	<	threadShouldThrow();
140	<	} catch (InterruptedException ie){
141	<	}
142	<	}});
132	<	t.start();
133	<	try {
134	<	Thread.sleep(SHORT_DELAY_MS);
135	<	t.interrupt();
136	<	t.join();
137	<	}
138	<	catch (InterruptedException ie) {
139	<	unexpectedException();
140	<	}
130	>	pleaseInterrupt.countDown();
131	>	try {
132	>	q.put(99);
133	>	shouldThrow();
134	>	} catch (InterruptedException success) {}
135	>	assertFalse(Thread.interrupted());
136	>	}});
137	>
138	>	await(pleaseInterrupt);
139	>	assertThreadStaysAlive(t);
140	>	t.interrupt();
141	>	awaitTermination(t);
142	>	assertEquals(0, q.remainingCapacity());
143		}
144
145		/**
146	<	*
146	>	* put blocks interruptibly waiting for take
147		*/
148	<	public void testPutWithTake() {
149	<	final SynchronousQueue q = new SynchronousQueue();
150	<	Thread t = new Thread(new Runnable() {
151	<	public void run() {
152	<	int added = 0;
153	<	try {
154	<	q.put(new Object());
155	<	++added;
156	<	q.put(new Object());
157	<	++added;
156	<	q.put(new Object());
157	<	++added;
158	<	q.put(new Object());
159	<	++added;
160	<	threadShouldThrow();
161	<	} catch (InterruptedException e){
162	<	assertTrue(added >= 1);
163	<	}
164	<	}
165	<	});
166	<	try {
167	<	t.start();
168	<	Thread.sleep(SHORT_DELAY_MS);
169	<	q.take();
170	<	Thread.sleep(SHORT_DELAY_MS);
171	<	t.interrupt();
172	<	t.join();
173	<	} catch (Exception e){
174	<	unexpectedException();
175	<	}
176	<	}
148	>	public void testPutWithTake()      { testPutWithTake(false); }
149	>	public void testPutWithTake_fair() { testPutWithTake(true); }
150	>	public void testPutWithTake(boolean fair) {
151	>	final SynchronousQueue q = new SynchronousQueue(fair);
152	>	final CountDownLatch pleaseTake = new CountDownLatch(1);
153	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
154	>	Thread t = newStartedThread(new CheckedRunnable() {
155	>	public void realRun() throws InterruptedException {
156	>	pleaseTake.countDown();
157	>	q.put(one);
158
159	<	/**
160	<	*
161	<	*/
162	<	public void testTimedOffer() {
163	<	final SynchronousQueue q = new SynchronousQueue();
164	<	Thread t = new Thread(new Runnable() {
165	<	public void run() {
185	<	try {
186	<
187	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
188	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
189	<	threadShouldThrow();
190	<	} catch (InterruptedException success){}
191	<	}
192	<	});
193	<
194	<	try {
195	<	t.start();
196	<	Thread.sleep(SMALL_DELAY_MS);
197	<	t.interrupt();
198	<	t.join();
199	<	} catch (Exception e){
200	<	unexpectedException();
201	<	}
202	<	}
159	>	pleaseInterrupt.countDown();
160	>	try {
161	>	q.put(99);
162	>	shouldThrow();
163	>	} catch (InterruptedException success) {}
164	>	assertFalse(Thread.interrupted());
165	>	}});
166
167	+	await(pleaseTake);
168	+	assertEquals(0, q.remainingCapacity());
169	+	try { assertSame(one, q.take()); }
170	+	catch (InterruptedException e) { threadUnexpectedException(e); }
171
172	<	/**
173	<	*
174	<	*/
175	<	public void testTakeFromEmpty() {
176	<	final SynchronousQueue q = new SynchronousQueue();
210	<	Thread t = new Thread(new Runnable() {
211	<	public void run() {
212	<	try {
213	<	q.take();
214	<	threadShouldThrow();
215	<	} catch (InterruptedException success){ }
216	<	}
217	<	});
218	<	try {
219	<	t.start();
220	<	Thread.sleep(SHORT_DELAY_MS);
221	<	t.interrupt();
222	<	t.join();
223	<	} catch (Exception e){
224	<	unexpectedException();
225	<	}
172	>	await(pleaseInterrupt);
173	>	assertThreadStaysAlive(t);
174	>	t.interrupt();
175	>	awaitTermination(t);
176	>	assertEquals(0, q.remainingCapacity());
177		}
178
179		/**
180	<	*
180	>	* timed offer times out if elements not taken
181		*/
182	<	public void testPoll() {
183	<	SynchronousQueue q = new SynchronousQueue();
184	<	assertNull(q.poll());
182	>	public void testTimedOffer()      { testTimedOffer(false); }
183	>	public void testTimedOffer_fair() { testTimedOffer(true); }
184	>	public void testTimedOffer(boolean fair) {
185	>	final SynchronousQueue q = new SynchronousQueue(fair);
186	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
187	>	Thread t = newStartedThread(new CheckedRunnable() {
188	>	public void realRun() throws InterruptedException {
189	>	long startTime = System.nanoTime();
190	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
191	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
192	>	pleaseInterrupt.countDown();
193	>	try {
194	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
195	>	shouldThrow();
196	>	} catch (InterruptedException success) {}
197	>	}});
198	>
199	>	await(pleaseInterrupt);
200	>	assertThreadStaysAlive(t);
201	>	t.interrupt();
202	>	awaitTermination(t);
203		}
204
205		/**
206	<	*
206	>	* poll return null if no active putter
207		*/
208	<	public void testTimedPoll0() {
209	<	try {
210	<	SynchronousQueue q = new SynchronousQueue();
211	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
212	<	} catch (InterruptedException e){
244	<	unexpectedException();
245	<	}
208	>	public void testPoll()      { testPoll(false); }
209	>	public void testPoll_fair() { testPoll(true); }
210	>	public void testPoll(boolean fair) {
211	>	final SynchronousQueue q = new SynchronousQueue(fair);
212	>	assertNull(q.poll());
213		}
214
215		/**
216	<	*
216	>	* timed poll with zero timeout times out if no active putter
217		*/
218	<	public void testTimedPoll() {
219	<	try {
220	<	SynchronousQueue q = new SynchronousQueue();
221	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
222	<	} catch (InterruptedException e){
223	<	unexpectedException();
257	<	}
218	>	public void testTimedPoll0()      { testTimedPoll0(false); }
219	>	public void testTimedPoll0_fair() { testTimedPoll0(true); }
220	>	public void testTimedPoll0(boolean fair) {
221	>	final SynchronousQueue q = new SynchronousQueue(fair);
222	>	try { assertNull(q.poll(0, MILLISECONDS)); }
223	>	catch (InterruptedException e) { threadUnexpectedException(e); }
224		}
225
226		/**
227	<	*
228	<	*/
229	<	public void testInterruptedTimedPoll() {
230	<	Thread t = new Thread(new Runnable() {
231	<	public void run() {
232	<	try {
233	<	SynchronousQueue q = new SynchronousQueue();
234	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
235	<	} catch (InterruptedException success){
236	<	}
271	<	}});
272	<	t.start();
273	<	try {
274	<	Thread.sleep(SHORT_DELAY_MS);
275	<	t.interrupt();
276	<	t.join();
277	<	}
278	<	catch (InterruptedException ie) {
279	<	unexpectedException();
280	<	}
227	>	* timed poll with nonzero timeout times out if no active putter
228	>	*/
229	>	public void testTimedPoll()      { testTimedPoll(false); }
230	>	public void testTimedPoll_fair() { testTimedPoll(true); }
231	>	public void testTimedPoll(boolean fair) {
232	>	final SynchronousQueue q = new SynchronousQueue(fair);
233	>	long startTime = System.nanoTime();
234	>	try { assertNull(q.poll(timeoutMillis(), MILLISECONDS)); }
235	>	catch (InterruptedException e) { threadUnexpectedException(e); }
236	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
237		}
238
239		/**
240	<	*
240	>	* timed poll before a delayed offer times out, returning null;
241	>	* after offer succeeds; on interruption throws
242		*/
243	<	public void testTimedPollWithOffer() {
244	<	final SynchronousQueue q = new SynchronousQueue();
245	<	Thread t = new Thread(new Runnable() {
246	<	public void run() {
247	<	try {
248	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
249	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
250	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
251	<	threadShouldThrow();
252	<	} catch (InterruptedException success) { }
253	<	}
254	<	});
255	<	try {
256	<	t.start();
257	<	Thread.sleep(SMALL_DELAY_MS);
258	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
259	<	t.interrupt();
260	<	t.join();
261	<	} catch (Exception e){
262	<	unexpectedException();
263	<	}
264	<	}
243	>	public void testTimedPollWithOffer()      { testTimedPollWithOffer(false); }
244	>	public void testTimedPollWithOffer_fair() { testTimedPollWithOffer(true); }
245	>	public void testTimedPollWithOffer(boolean fair) {
246	>	final SynchronousQueue q = new SynchronousQueue(fair);
247	>	final CountDownLatch pleaseOffer = new CountDownLatch(1);
248	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
249	>	Thread t = newStartedThread(new CheckedRunnable() {
250	>	public void realRun() throws InterruptedException {
251	>	long startTime = System.nanoTime();
252	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
253	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
254	>
255	>	pleaseOffer.countDown();
256	>	startTime = System.nanoTime();
257	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
258	>	assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS);
259	>
260	>	Thread.currentThread().interrupt();
261	>	try {
262	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
263	>	shouldThrow();
264	>	} catch (InterruptedException success) {}
265	>	assertFalse(Thread.interrupted());
266	>
267	>	pleaseInterrupt.countDown();
268	>	try {
269	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
270	>	shouldThrow();
271	>	} catch (InterruptedException success) {}
272	>	assertFalse(Thread.interrupted());
273	>	}});
274	>
275	>	await(pleaseOffer);
276	>	long startTime = System.nanoTime();
277	>	try { assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS)); }
278	>	catch (InterruptedException e) { threadUnexpectedException(e); }
279	>	assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS);
280
281	+	await(pleaseInterrupt);
282	+	assertThreadStaysAlive(t);
283	+	t.interrupt();
284	+	awaitTermination(t);
285	+	}
286
287		/**
288	<	*
288	>	* peek() returns null if no active putter
289		*/
290	<	public void testPeek() {
291	<	SynchronousQueue q = new SynchronousQueue();
292	<	assertNull(q.peek());
290	>	public void testPeek()      { testPeek(false); }
291	>	public void testPeek_fair() { testPeek(true); }
292	>	public void testPeek(boolean fair) {
293	>	final SynchronousQueue q = new SynchronousQueue(fair);
294	>	assertNull(q.peek());
295		}
296
297		/**
298	<	*
298	>	* element() throws NoSuchElementException if no active putter
299		*/
300	<	public void testElement() {
301	<	SynchronousQueue q = new SynchronousQueue();
300	>	public void testElement()      { testElement(false); }
301	>	public void testElement_fair() { testElement(true); }
302	>	public void testElement(boolean fair) {
303	>	final SynchronousQueue q = new SynchronousQueue(fair);
304		try {
305		q.element();
306		shouldThrow();
307	<	}
327	<	catch (NoSuchElementException success) {}
307	>	} catch (NoSuchElementException success) {}
308		}
309
310		/**
311	<	*
311	>	* remove() throws NoSuchElementException if no active putter
312		*/
313	<	public void testRemove() {
314	<	SynchronousQueue q = new SynchronousQueue();
313	>	public void testRemove()      { testRemove(false); }
314	>	public void testRemove_fair() { testRemove(true); }
315	>	public void testRemove(boolean fair) {
316	>	final SynchronousQueue q = new SynchronousQueue(fair);
317		try {
318		q.remove();
319		shouldThrow();
320	<	} catch (NoSuchElementException success){
339	<	}
320	>	} catch (NoSuchElementException success) {}
321		}
322
323		/**
324	<	*
324	>	* contains returns false
325		*/
326	<	public void testRemoveElement() {
327	<	SynchronousQueue q = new SynchronousQueue();
328	<	assertFalse(q.remove(new Integer(0)));
329	<	assertTrue(q.isEmpty());
330	<	}
350	<
351	<	/**
352	<	*
353	<	*/
354	<	public void testContains() {
355	<	SynchronousQueue q = new SynchronousQueue();
356	<	assertFalse(q.contains(new Integer(0)));
326	>	public void testContains()      { testContains(false); }
327	>	public void testContains_fair() { testContains(true); }
328	>	public void testContains(boolean fair) {
329	>	final SynchronousQueue q = new SynchronousQueue(fair);
330	>	assertFalse(q.contains(zero));
331		}
332
333		/**
334	<	*
334	>	* clear ensures isEmpty
335		*/
336	<	public void testClear() {
337	<	SynchronousQueue q = new SynchronousQueue();
336	>	public void testClear()      { testClear(false); }
337	>	public void testClear_fair() { testClear(true); }
338	>	public void testClear(boolean fair) {
339	>	final SynchronousQueue q = new SynchronousQueue(fair);
340		q.clear();
341		assertTrue(q.isEmpty());
342		}
343
344		/**
345	<	*
345	>	* containsAll returns false unless empty
346		*/
347	<	public void testContainsAll() {
348	<	SynchronousQueue q = new SynchronousQueue();
347	>	public void testContainsAll()      { testContainsAll(false); }
348	>	public void testContainsAll_fair() { testContainsAll(true); }
349	>	public void testContainsAll(boolean fair) {
350	>	final SynchronousQueue q = new SynchronousQueue(fair);
351		Integer[] empty = new Integer[0];
352	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
352	>	assertTrue(q.containsAll(Arrays.asList(empty)));
353	>	Integer[] ints = new Integer[1]; ints[0] = zero;
354		assertFalse(q.containsAll(Arrays.asList(ints)));
355		}
356
357		/**
358	<	*
358	>	* retainAll returns false
359		*/
360	<	public void testRetainAll() {
361	<	SynchronousQueue q = new SynchronousQueue();
360	>	public void testRetainAll()      { testRetainAll(false); }
361	>	public void testRetainAll_fair() { testRetainAll(true); }
362	>	public void testRetainAll(boolean fair) {
363	>	final SynchronousQueue q = new SynchronousQueue(fair);
364		Integer[] empty = new Integer[0];
365	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
366	<	q.retainAll(Arrays.asList(ints));
367	<	assertFalse(q.containsAll(Arrays.asList(ints)));
365	>	assertFalse(q.retainAll(Arrays.asList(empty)));
366	>	Integer[] ints = new Integer[1]; ints[0] = zero;
367	>	assertFalse(q.retainAll(Arrays.asList(ints)));
368		}
369
370		/**
371	<	*
371	>	* removeAll returns false
372		*/
373	<	public void testRemoveAll() {
374	<	SynchronousQueue q = new SynchronousQueue();
373	>	public void testRemoveAll()      { testRemoveAll(false); }
374	>	public void testRemoveAll_fair() { testRemoveAll(true); }
375	>	public void testRemoveAll(boolean fair) {
376	>	final SynchronousQueue q = new SynchronousQueue(fair);
377		Integer[] empty = new Integer[0];
378	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
379	<	q.removeAll(Arrays.asList(ints));
378	>	assertFalse(q.removeAll(Arrays.asList(empty)));
379	>	Integer[] ints = new Integer[1]; ints[0] = zero;
380		assertFalse(q.containsAll(Arrays.asList(ints)));
381		}
382
383	+	/**
384	+	* toArray is empty
385	+	*/
386	+	public void testToArray()      { testToArray(false); }
387	+	public void testToArray_fair() { testToArray(true); }
388	+	public void testToArray(boolean fair) {
389	+	final SynchronousQueue q = new SynchronousQueue(fair);
390	+	Object[] o = q.toArray();
391	+	assertEquals(0, o.length);
392	+	}
393
394		/**
395	<	*
395	>	* toArray(Integer array) returns its argument with the first
396	>	* element (if present) nulled out
397		*/
398	<	public void testToArray() {
399	<	SynchronousQueue q = new SynchronousQueue();
400	<	Object[] o = q.toArray();
401	<	assertEquals(o.length, 0);
398	>	public void testToArray2()      { testToArray2(false); }
399	>	public void testToArray2_fair() { testToArray2(true); }
400	>	public void testToArray2(boolean fair) {
401	>	final SynchronousQueue<Integer> q
402	>	= new SynchronousQueue<Integer>(fair);
403	>	Integer[] a;
404	>
405	>	a = new Integer[0];
406	>	assertSame(a, q.toArray(a));
407	>
408	>	a = new Integer[3];
409	>	Arrays.fill(a, 42);
410	>	assertSame(a, q.toArray(a));
411	>	assertNull(a[0]);
412	>	for (int i = 1; i < a.length; i++)
413	>	assertEquals(42, (int) a[i]);
414		}
415
416		/**
417	<	*
417	>	* toArray(null) throws NPE
418		*/
419	<	public void testToArray2() {
420	<	SynchronousQueue q = new SynchronousQueue();
421	<	Integer[] ints = new Integer[1];
422	<	assertNull(ints[0]);
419	>	public void testToArray_null()      { testToArray_null(false); }
420	>	public void testToArray_null_fair() { testToArray_null(true); }
421	>	public void testToArray_null(boolean fair) {
422	>	final SynchronousQueue q = new SynchronousQueue(fair);
423	>	try {
424	>	Object o[] = q.toArray(null);
425	>	shouldThrow();
426	>	} catch (NullPointerException success) {}
427		}
428	<
428	>
429		/**
430	<	*
430	>	* iterator does not traverse any elements
431		*/
432	<	public void testIterator() {
433	<	SynchronousQueue q = new SynchronousQueue();
434	<	Iterator it = q.iterator();
432	>	public void testIterator()      { testIterator(false); }
433	>	public void testIterator_fair() { testIterator(true); }
434	>	public void testIterator(boolean fair) {
435	>	final SynchronousQueue q = new SynchronousQueue(fair);
436	>	Iterator it = q.iterator();
437		assertFalse(it.hasNext());
438		try {
439		Object x = it.next();
440		shouldThrow();
441	<	}
430	<	catch (NoSuchElementException success) {}
441	>	} catch (NoSuchElementException success) {}
442		}
443
444		/**
445	<	*
445	>	* iterator remove throws ISE
446		*/
447	<	public void testIteratorRemove() {
448	<	SynchronousQueue q = new SynchronousQueue();
449	<	Iterator it = q.iterator();
447	>	public void testIteratorRemove()      { testIteratorRemove(false); }
448	>	public void testIteratorRemove_fair() { testIteratorRemove(true); }
449	>	public void testIteratorRemove(boolean fair) {
450	>	final SynchronousQueue q = new SynchronousQueue(fair);
451	>	Iterator it = q.iterator();
452		try {
453		it.remove();
454		shouldThrow();
455	<	}
443	<	catch (IllegalStateException success) {}
455	>	} catch (IllegalStateException success) {}
456		}
457
458		/**
459	<	*
459	>	* toString returns a non-null string
460		*/
461	<	public void testToString() {
462	<	SynchronousQueue q = new SynchronousQueue();
461	>	public void testToString()      { testToString(false); }
462	>	public void testToString_fair() { testToString(true); }
463	>	public void testToString(boolean fair) {
464	>	final SynchronousQueue q = new SynchronousQueue(fair);
465		String s = q.toString();
466	<	assertTrue(s != null);
467	<	}
454	<
466	>	assertNotNull(s);
467	>	}
468
469		/**
470	<	*
470	>	* offer transfers elements across Executor tasks
471		*/
472	<	public void testOfferInExecutor() {
473	<	final SynchronousQueue q = new SynchronousQueue();
472	>	public void testOfferInExecutor()      { testOfferInExecutor(false); }
473	>	public void testOfferInExecutor_fair() { testOfferInExecutor(true); }
474	>	public void testOfferInExecutor(boolean fair) {
475	>	final SynchronousQueue q = new SynchronousQueue(fair);
476		ExecutorService executor = Executors.newFixedThreadPool(2);
477	<	final Integer one = new Integer(1);
477	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
478
479	<	executor.execute(new Runnable() {
480	<	public void run() {
481	<	threadAssertFalse(q.offer(one));
482	<	try {
483	<	threadAssertTrue(q.offer(one, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
484	<	threadAssertEquals(0, q.remainingCapacity());
485	<	}
486	<	catch (InterruptedException e) {
487	<	threadUnexpectedException();
488	<	}
489	<	}
490	<	});
479	>	executor.execute(new CheckedRunnable() {
480	>	public void realRun() throws InterruptedException {
481	>	assertFalse(q.offer(one));
482	>	threadsStarted.await();
483	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
484	>	assertEquals(0, q.remainingCapacity());
485	>	}});
486	>
487	>	executor.execute(new CheckedRunnable() {
488	>	public void realRun() throws InterruptedException {
489	>	threadsStarted.await();
490	>	assertSame(one, q.take());
491	>	}});
492
477	–	executor.execute(new Runnable() {
478	–	public void run() {
479	–	try {
480	–	Thread.sleep(SMALL_DELAY_MS);
481	–	threadAssertEquals(one, q.take());
482	–	}
483	–	catch (InterruptedException e) {
484	–	threadUnexpectedException();
485	–	}
486	–	}
487	–	});
488	–
493		joinPool(executor);
490	–
494		}
495
496		/**
497	<	*
497	>	* timed poll retrieves elements across Executor threads
498		*/
499	<	public void testPollInExecutor() {
500	<
501	<	final SynchronousQueue q = new SynchronousQueue();
502	<
499	>	public void testPollInExecutor()      { testPollInExecutor(false); }
500	>	public void testPollInExecutor_fair() { testPollInExecutor(true); }
501	>	public void testPollInExecutor(boolean fair) {
502	>	final SynchronousQueue q = new SynchronousQueue(fair);
503	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
504		ExecutorService executor = Executors.newFixedThreadPool(2);
505	+	executor.execute(new CheckedRunnable() {
506	+	public void realRun() throws InterruptedException {
507	+	assertNull(q.poll());
508	+	threadsStarted.await();
509	+	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
510	+	assertTrue(q.isEmpty());
511	+	}});
512	+
513	+	executor.execute(new CheckedRunnable() {
514	+	public void realRun() throws InterruptedException {
515	+	threadsStarted.await();
516	+	q.put(one);
517	+	}});
518
502	–	executor.execute(new Runnable() {
503	–	public void run() {
504	–	threadAssertNull(q.poll());
505	–	try {
506	–	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
507	–	threadAssertTrue(q.isEmpty());
508	–	}
509	–	catch (InterruptedException e) {
510	–	threadUnexpectedException();
511	–	}
512	–	}
513	–	});
514	–
515	–	executor.execute(new Runnable() {
516	–	public void run() {
517	–	try {
518	–	Thread.sleep(SMALL_DELAY_MS);
519	–	q.put(new Integer(1));
520	–	}
521	–	catch (InterruptedException e) {
522	–	threadUnexpectedException();
523	–	}
524	–	}
525	–	});
526	–
519		joinPool(executor);
528	–
520		}
521
522		/**
523	<	*
523	>	* a deserialized serialized queue is usable
524		*/
525		public void testSerialization() {
526	<	SynchronousQueue q = new SynchronousQueue();
527	<	try {
528	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
529	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
530	<	out.writeObject(q);
531	<	out.close();
532	<
533	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
534	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
535	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
536	<	assertEquals(q.size(), r.size());
537	<	while (!q.isEmpty())
538	<	assertEquals(q.remove(), r.remove());
539	<	} catch(Exception e){
540	<	unexpectedException();
526	>	final SynchronousQueue x = new SynchronousQueue();
527	>	final SynchronousQueue y = new SynchronousQueue(false);
528	>	final SynchronousQueue z = new SynchronousQueue(true);
529	>	assertSerialEquals(x, y);
530	>	assertNotSerialEquals(x, z);
531	>	SynchronousQueue[] qs = { x, y, z };
532	>	for (SynchronousQueue q : qs) {
533	>	SynchronousQueue clone = serialClone(q);
534	>	assertNotSame(q, clone);
535	>	assertSerialEquals(q, clone);
536	>	assertTrue(clone.isEmpty());
537	>	assertEquals(0, clone.size());
538	>	assertEquals(0, clone.remainingCapacity());
539	>	assertFalse(clone.offer(zero));
540	>	}
541	>	}
542	>
543	>	/**
544	>	* drainTo(c) of empty queue doesn't transfer elements
545	>	*/
546	>	public void testDrainTo()      { testDrainTo(false); }
547	>	public void testDrainTo_fair() { testDrainTo(true); }
548	>	public void testDrainTo(boolean fair) {
549	>	final SynchronousQueue q = new SynchronousQueue(fair);
550	>	ArrayList l = new ArrayList();
551	>	q.drainTo(l);
552	>	assertEquals(0, q.size());
553	>	assertEquals(0, l.size());
554	>	}
555	>
556	>	/**
557	>	* drainTo empties queue, unblocking a waiting put.
558	>	*/
559	>	public void testDrainToWithActivePut()      { testDrainToWithActivePut(false); }
560	>	public void testDrainToWithActivePut_fair() { testDrainToWithActivePut(true); }
561	>	public void testDrainToWithActivePut(boolean fair) {
562	>	final SynchronousQueue q = new SynchronousQueue(fair);
563	>	Thread t = newStartedThread(new CheckedRunnable() {
564	>	public void realRun() throws InterruptedException {
565	>	q.put(one);
566	>	}});
567	>
568	>	ArrayList l = new ArrayList();
569	>	long startTime = System.nanoTime();
570	>	while (l.isEmpty()) {
571	>	q.drainTo(l);
572	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
573	>	fail("timed out");
574	>	Thread.yield();
575		}
576	+	assertTrue(l.size() == 1);
577	+	assertSame(one, l.get(0));
578	+	awaitTermination(t);
579	+	}
580	+
581	+	/**
582	+	* drainTo(c, n) empties up to n elements of queue into c
583	+	*/
584	+	public void testDrainToN() throws InterruptedException {
585	+	final SynchronousQueue q = new SynchronousQueue();
586	+	Thread t1 = newStartedThread(new CheckedRunnable() {
587	+	public void realRun() throws InterruptedException {
588	+	q.put(one);
589	+	}});
590	+
591	+	Thread t2 = newStartedThread(new CheckedRunnable() {
592	+	public void realRun() throws InterruptedException {
593	+	q.put(two);
594	+	}});
595	+
596	+	ArrayList l = new ArrayList();
597	+	delay(SHORT_DELAY_MS);
598	+	q.drainTo(l, 1);
599	+	assertEquals(1, l.size());
600	+	q.drainTo(l, 1);
601	+	assertEquals(2, l.size());
602	+	assertTrue(l.contains(one));
603	+	assertTrue(l.contains(two));
604	+	awaitTermination(t1);
605	+	awaitTermination(t2);
606	+	}
607	+
608	+	/**
609	+	* remove(null), contains(null) always return false
610	+	*/
611	+	public void testNeverContainsNull() {
612	+	Collection<?> q = new SynchronousQueue();
613	+	assertFalse(q.contains(null));
614	+	assertFalse(q.remove(null));
615		}
616
617		}

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