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Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:55 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	<
13	<	public class SynchronousQueueTest extends TestCase {
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 class Fair extends BlockingQueueTest {
25	>	protected BlockingQueue emptyCollection() {
26	>	return new SynchronousQueue(true);
27	>	}
28	>	}
29
30	<	private final static int N = 1;
31	<	private static long SHORT_DELAY_MS = 100;
32	<	private static long MEDIUM_DELAY_MS = 1000;
33	<	private static long LONG_DELAY_MS = 10000;
30	>	public static class NonFair extends BlockingQueueTest {
31	>	protected BlockingQueue emptyCollection() {
32	>	return new SynchronousQueue(false);
33	>	}
34	>	}
35
36		public static void main(String[] args) {
37	<	junit.textui.TestRunner.run (suite());
37	>	junit.textui.TestRunner.run(suite());
38		}
39
40		public static Test suite() {
41	<	return new TestSuite(SynchronousQueueTest.class);
41	>	return newTestSuite(SynchronousQueueTest.class,
42	>	new Fair().testSuite(),
43	>	new NonFair().testSuite());
44		}
45
46	<	public void testEmptyFull() {
47	<	SynchronousQueue q = new SynchronousQueue();
46	>	/**
47	>	* Any SynchronousQueue is both empty and full
48	>	*/
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());
54	>	assertEquals(0, q.size());
55		assertEquals(0, q.remainingCapacity());
56	<	assertFalse(q.offer(new Integer(3)));
33	<	}
34	<
35	<	public void testOfferNull(){
36	<	try {
37	<	SynchronousQueue q = new SynchronousQueue();
38	<	q.offer(null);
39	<	fail("should throw NPE");
40	<	} catch (NullPointerException success) { }
41	<	}
42	<
43	<	public void testOffer(){
44	<	SynchronousQueue q = new SynchronousQueue();
45	<	assertFalse(q.offer(new Integer(1)));
56	>	assertFalse(q.offer(zero));
57		}
58
59	<	public void testAdd(){
60	<	try {
61	<	SynchronousQueue q = new SynchronousQueue();
62	<	assertEquals(0, q.remainingCapacity());
63	<	q.add(new Integer(0));
64	<	} catch (IllegalStateException success){
65	<	}
66	<	}
67	<
68	<	public void testAddAll1(){
69	<	try {
70	<	SynchronousQueue q = new SynchronousQueue();
71	<	q.addAll(null);
72	<	fail("Cannot add null collection");
73	<	}
74	<	catch (NullPointerException success) {}
75	<	}
76	<	public void testAddAll2(){
66	<	try {
67	<	SynchronousQueue q = new SynchronousQueue();
68	<	Integer[] ints = new Integer[N];
69	<	q.addAll(Arrays.asList(ints));
70	<	fail("Cannot add null elements");
71	<	}
72	<	catch (NullPointerException success) {}
73	<	}
74	<	public void testAddAll4(){
75	<	try {
76	<	SynchronousQueue q = new SynchronousQueue();
77	<	Integer[] ints = new Integer[N];
78	<	for (int i = 0; i < N; ++i)
79	<	ints[i] = new Integer(i);
80	<	q.addAll(Arrays.asList(ints));
81	<	fail("Cannot add with insufficient capacity");
82	<	}
83	<	catch (IllegalStateException success) {}
84	<	}
85	<
86	<	public void testPutNull() {
87	<	try {
88	<	SynchronousQueue q = new SynchronousQueue();
89	<	q.put(null);
90	<	fail("put should throw NPE");
91	<	}
92	<	catch (NullPointerException success){
93	<	}
94	<	catch (InterruptedException ie) {
95	<	fail("Unexpected exception");
96	<	}
97	<	}
98	<
99	<	public void testBlockingPut(){
100	<	Thread t = new Thread(new Runnable() {
101	<	public void run() {
102	<	try {
103	<	SynchronousQueue q = new SynchronousQueue();
104	<	q.put(new Integer(0));
105	<	fail("put should block");
106	<	} catch (InterruptedException ie){
107	<	}
108	<	}});
109	<	t.start();
110	<	try {
111	<	Thread.sleep(SHORT_DELAY_MS);
112	<	t.interrupt();
113	<	t.join();
114	<	}
115	<	catch (InterruptedException ie) {
116	<	fail("Unexpected exception");
117	<	}
118	<	}
119	<
120	<	public void testPutWithTake() {
121	<	final SynchronousQueue q = new SynchronousQueue();
122	<	Thread t = new Thread(new Runnable() {
123	<	public void run(){
124	<	int added = 0;
125	<	try {
126	<	q.put(new Object());
127	<	++added;
128	<	q.put(new Object());
129	<	++added;
130	<	q.put(new Object());
131	<	++added;
132	<	q.put(new Object());
133	<	++added;
134	<	fail("Should block");
135	<	} catch (InterruptedException e){
136	<	assertTrue(added >= 1);
137	<	}
138	<	}
139	<	});
59	>	/**
60	>	* offer fails if no active taker
61	>	*/
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	>	* add throws IllegalStateException if no active taker
71	>	*/
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	<	t.start();
79	<	Thread.sleep(SHORT_DELAY_MS);
80	<	q.take();
81	<	Thread.sleep(SHORT_DELAY_MS);
82	<	t.interrupt();
83	<	t.join();
84	<	} catch (Exception e){
85	<	fail("Unexpected exception");
86	<	}
87	<	}
78	>	q.add(one);
79	>	shouldThrow();
80	>	} catch (IllegalStateException success) {}
81	>	}
82	>
83	>	/**
84	>	* addAll(this) throws IllegalArgumentException
85	>	*/
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	>	q.addAll(q);
92	>	shouldThrow();
93	>	} catch (IllegalArgumentException success) {}
94	>	}
95	>
96	>	/**
97	>	* addAll throws ISE if no active taker
98	>	*/
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	>	q.addAll(coll);
109	>	shouldThrow();
110	>	} catch (IllegalStateException success) {}
111	>	}
112	>
113	>	/**
114	>	* put blocks interruptibly if no active taker
115	>	*/
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	<	public void testTimedOffer() {
131	<	final SynchronousQueue q = new SynchronousQueue();
132	<	Thread t = new Thread(new Runnable() {
133	<	public void run(){
134	<	try {
135	<
136	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
137	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
138	<	fail("Should block");
139	<	} catch (InterruptedException success){}
140	<	}
141	<	});
142	<
165	<	try {
166	<	t.start();
167	<	Thread.sleep(SHORT_DELAY_MS);
168	<	t.interrupt();
169	<	t.join();
170	<	} catch (Exception e){
171	<	fail("Unexpected exception");
172	<	}
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	+	* put blocks interruptibly waiting for take
147	+	*/
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	<	public void testTakeFromEmpty() {
160	<	final SynchronousQueue q = new SynchronousQueue();
161	<	Thread t = new Thread(new Runnable() {
162	<	public void run(){
163	<	try {
164	<	q.take();
165	<	fail("Should block");
183	<	} catch (InterruptedException success){ }
184	<	}
185	<	});
186	<	try {
187	<	t.start();
188	<	Thread.sleep(SHORT_DELAY_MS);
189	<	t.interrupt();
190	<	t.join();
191	<	} catch (Exception e){
192	<	fail("Unexpected exception");
193	<	}
194	<	}
195	<
196	<	public void testPoll(){
197	<	SynchronousQueue q = new SynchronousQueue();
198	<	assertNull(q.poll());
199	<	}
159	>	pleaseInterrupt.countDown();
160	>	try {
161	>	q.put(99);
162	>	shouldThrow();
163	>	} catch (InterruptedException success) {}
164	>	assertFalse(Thread.interrupted());
165	>	}});
166
167	<	public void testTimedPoll0() {
168	<	try {
169	<	SynchronousQueue q = new SynchronousQueue();
170	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
205	<	} catch (InterruptedException e){
206	<	fail("Unexpected exception");
207	<	}
208	<	}
167	>	await(pleaseTake);
168	>	assertEquals(0, q.remainingCapacity());
169	>	try { assertSame(one, q.take()); }
170	>	catch (InterruptedException e) { threadUnexpectedException(e); }
171
172	<	public void testTimedPoll() {
173	<	try {
174	<	SynchronousQueue q = new SynchronousQueue();
175	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
176	<	} catch (InterruptedException e){
215	<	fail("Unexpected exception");
216	<	}
217	<	}
218	<
219	<	public void testInterruptedTimedPoll(){
220	<	Thread t = new Thread(new Runnable() {
221	<	public void run() {
222	<	try {
223	<	SynchronousQueue q = new SynchronousQueue();
224	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
225	<	} catch (InterruptedException success){
226	<	}
227	<	}});
228	<	t.start();
229	<	try {
230	<	Thread.sleep(SHORT_DELAY_MS);
231	<	t.interrupt();
232	<	t.join();
233	<	}
234	<	catch (InterruptedException ie) {
235	<	fail("Unexpected exception");
236	<	}
172	>	await(pleaseInterrupt);
173	>	assertThreadStaysAlive(t);
174	>	t.interrupt();
175	>	awaitTermination(t);
176	>	assertEquals(0, q.remainingCapacity());
177		}
178
179	<	public void testTimedPollWithOffer(){
180	<	final SynchronousQueue q = new SynchronousQueue();
181	<	Thread t = new Thread(new Runnable() {
182	<	public void run(){
183	<	try {
184	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
185	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
186	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
187	<	fail("Should block");
188	<	} catch (InterruptedException success) { }
189	<	}
190	<	});
191	<	try {
192	<	t.start();
193	<	Thread.sleep(SHORT_DELAY_MS * 2);
194	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
195	<	t.interrupt();
196	<	t.join();
197	<	} catch (Exception e){
198	<	fail("Unexpected exception");
199	<	}
200	<	}
201	<
179	>	/**
180	>	* timed offer times out if elements not taken
181	>	*/
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	>	* poll return null if no active putter
207	>	*/
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	>	* timed poll with zero timeout times out if no active putter
217	>	*/
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	>	* 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	>	* timed poll before a delayed offer times out, returning null;
241	>	* after offer succeeds; on interruption throws
242	>	*/
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	<	public void testPeek(){
261	<	SynchronousQueue q = new SynchronousQueue();
262	<	assertNull(q.peek());
263	<	}
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	<	public void testElement(){
268	<	SynchronousQueue q = new SynchronousQueue();
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	>	* peek() returns null if no active putter
289	>	*/
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	>	* element() throws NoSuchElementException if no active putter
299	>	*/
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	<	fail("no such element");
307	<	}
274	<	catch (NoSuchElementException success) {}
306	>	shouldThrow();
307	>	} catch (NoSuchElementException success) {}
308		}
309
310	<	public void testRemove(){
311	<	SynchronousQueue q = new SynchronousQueue();
310	>	/**
311	>	* remove() throws NoSuchElementException if no active putter
312	>	*/
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	<	fail("remove should throw");
320	<	} catch (NoSuchElementException success){
283	<	}
319	>	shouldThrow();
320	>	} catch (NoSuchElementException success) {}
321		}
322
323	<	public void testRemoveElement(){
324	<	SynchronousQueue q = new SynchronousQueue();
325	<	for (int i = 1; i < N; i+=2) {
326	<	assertFalse(q.remove(new Integer(i)));
327	<	}
328	<	assert(q.isEmpty());
329	<	}
330	<
331	<	public void testContains(){
332	<	SynchronousQueue q = new SynchronousQueue();
333	<	for (int i = 0; i < N; ++i) {
334	<	assertFalse(q.contains(new Integer(i)));
335	<	}
336	<	}
337	<
338	<	public void testClear(){
339	<	SynchronousQueue q = new SynchronousQueue();
323	>	/**
324	>	* contains returns false
325	>	*/
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	>	* clear ensures isEmpty
335	>	*/
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	<	public void testContainsAll(){
345	<	SynchronousQueue q = new SynchronousQueue();
344	>	/**
345	>	* containsAll returns false unless empty
346	>	*/
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);
353	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
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	<	public void testRetainAll(){
358	<	SynchronousQueue q = new SynchronousQueue();
357	>	/**
358	>	* retainAll returns false
359	>	*/
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	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
321	<	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	<	public void testRemoveAll(){
371	<	SynchronousQueue q = new SynchronousQueue();
370	>	/**
371	>	* removeAll returns false
372	>	*/
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));
329	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
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	<	public void testToArray(){
385	<	SynchronousQueue q = new SynchronousQueue();
386	<	Object[] o = q.toArray();
387	<	assertEquals(o.length, 0);
388	<	}
389	<
390	<	public void testToArray2(){
391	<	SynchronousQueue q = new SynchronousQueue();
392	<	Integer[] ints = new Integer[1];
393	<	assertNull(ints[0]);
394	<	}
395	<
396	<	public void testIterator(){
397	<	SynchronousQueue q = new SynchronousQueue();
398	<	Iterator it = q.iterator();
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	>	* toArray(Integer array) returns its argument with the first
396	>	* element (if present) nulled out
397	>	*/
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	>	* toArray(null) throws NPE
418	>	*/
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	>
429	>	/**
430	>	* iterator does not traverse any elements
431	>	*/
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	<	fail("should throw");
441	<	}
354	<	catch (NoSuchElementException success) {}
440	>	shouldThrow();
441	>	} catch (NoSuchElementException success) {}
442		}
443
444	<	public void testIteratorRemove(){
445	<	SynchronousQueue q = new SynchronousQueue();
446	<	Iterator it = q.iterator();
444	>	/**
445	>	* iterator remove throws ISE
446	>	*/
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	<	fail("should throw");
455	<	}
364	<	catch (IllegalStateException success) {}
454	>	shouldThrow();
455	>	} catch (IllegalStateException success) {}
456		}
457
458	<	public void testToString(){
459	<	SynchronousQueue q = new SynchronousQueue();
458	>	/**
459	>	* toString returns a non-null string
460	>	*/
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	<	}
372	<
466	>	assertNotNull(s);
467	>	}
468
469	<	public void testOfferInExecutor() {
470	<	final SynchronousQueue q = new SynchronousQueue();
469	>	/**
470	>	* offer transfers elements across Executor tasks
471	>	*/
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() {
479	>	executor.execute(new CheckedRunnable() {
480	>	public void realRun() throws InterruptedException {
481		assertFalse(q.offer(one));
482	<	try {
483	<	assertTrue(q.offer(one, MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
484	<	assertEquals(0, q.remainingCapacity());
485	<	}
486	<	catch (InterruptedException e) {
487	<	fail("should not be interrupted");
488	<	}
489	<	}
490	<	});
491	<
492	<	executor.execute(new Runnable() {
493	<	public void run() {
494	<	try {
495	<	Thread.sleep(MEDIUM_DELAY_MS);
496	<	assertEquals(one, q.take());
497	<	}
498	<	catch (InterruptedException e) {
499	<	fail("should not be interrupted");
500	<	}
501	<	}
502	<	});
503	<
404	<	executor.shutdown();
405	<
406	<	}
407	<
408	<	public void testPollInExecutor() {
409	<
410	<	final SynchronousQueue q = new SynchronousQueue();
411	<
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	>
493	>	joinPool(executor);
494	>	}
495	>
496	>	/**
497	>	* timed poll retrieves elements across Executor threads
498	>	*/
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	<
506	<	executor.execute(new Runnable() {
415	<	public void run() {
505	>	executor.execute(new CheckedRunnable() {
506	>	public void realRun() throws InterruptedException {
507		assertNull(q.poll());
508	<	try {
509	<	assertTrue(null != q.poll(MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
510	<	assertTrue(q.isEmpty());
511	<	}
512	<	catch (InterruptedException e) {
513	<	fail("should not be interrupted");
514	<	}
515	<	}
516	<	});
517	<
518	<	executor.execute(new Runnable() {
519	<	public void run() {
520	<	try {
521	<	Thread.sleep(MEDIUM_DELAY_MS);
522	<	q.put(new Integer(1));
523	<	}
524	<	catch (InterruptedException e) {
525	<	fail("should not be interrupted");
526	<	}
527	<	}
528	<	});
529	<
530	<	executor.shutdown();
531	<
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	>
519	>	joinPool(executor);
520	>	}
521	>
522	>	/**
523	>	* a deserialized serialized queue is usable
524	>	*/
525	>	public void testSerialization() {
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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