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Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 20:39:11 2003 UTC vs.
Revision 1.41 by jsr166, Thu Dec 8 19:09:58 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 java.io.*;
13	<
14	<	public class SynchronousQueueTest extends TestCase {
15	<
16	<	private final static int N = 1;
17	<	private static long SHORT_DELAY_MS = 100;
18	<	private static long MEDIUM_DELAY_MS = 1000;
19	<	private static long LONG_DELAY_MS = 10000;
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.Queue;
16	>	import java.util.concurrent.BlockingQueue;
17	>	import java.util.concurrent.CountDownLatch;
18	>	import java.util.concurrent.Executors;
19	>	import java.util.concurrent.ExecutorService;
20	>	import java.util.concurrent.SynchronousQueue;
21	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
22	>
23	>	public class SynchronousQueueTest extends JSR166TestCase {
24	>
25	>	public static class Fair extends BlockingQueueTest {
26	>	protected BlockingQueue emptyCollection() {
27	>	return new SynchronousQueue(true);
28	>	}
29	>	}
30	>
31	>	public static class NonFair extends BlockingQueueTest {
32	>	protected BlockingQueue emptyCollection() {
33	>	return new SynchronousQueue(false);
34	>	}
35	>	}
36
37		public static void main(String[] args) {
38	<	junit.textui.TestRunner.run (suite());
38	>	junit.textui.TestRunner.run(suite());
39		}
40
41		public static Test suite() {
42	<	return new TestSuite(SynchronousQueueTest.class);
42	>	return newTestSuite(SynchronousQueueTest.class,
43	>	new Fair().testSuite(),
44	>	new NonFair().testSuite());
45		}
46
47	<	public void testEmptyFull() {
48	<	SynchronousQueue q = new SynchronousQueue();
47	>	/**
48	>	* Any SynchronousQueue is both empty and full
49	>	*/
50	>	public void testEmptyFull()      { testEmptyFull(false); }
51	>	public void testEmptyFull_fair() { testEmptyFull(true); }
52	>	public void testEmptyFull(boolean fair) {
53	>	final SynchronousQueue q = new SynchronousQueue(fair);
54		assertTrue(q.isEmpty());
55	<	assertEquals(0, q.size());
55	>	assertEquals(0, q.size());
56		assertEquals(0, q.remainingCapacity());
57	<	assertFalse(q.offer(new Integer(3)));
34	<	}
35	<
36	<	public void testOfferNull(){
37	<	try {
38	<	SynchronousQueue q = new SynchronousQueue();
39	<	q.offer(null);
40	<	fail("should throw NPE");
41	<	} catch (NullPointerException success) { }
42	<	}
43	<
44	<	public void testOffer(){
45	<	SynchronousQueue q = new SynchronousQueue();
46	<	assertFalse(q.offer(new Integer(1)));
47	<	}
48	<
49	<	public void testAdd(){
50	<	try {
51	<	SynchronousQueue q = new SynchronousQueue();
52	<	assertEquals(0, q.remainingCapacity());
53	<	q.add(new Integer(0));
54	<	} catch (IllegalStateException success){
55	<	}
56	<	}
57	<
58	<	public void testAddAll1(){
59	<	try {
60	<	SynchronousQueue q = new SynchronousQueue();
61	<	q.addAll(null);
62	<	fail("Cannot add null collection");
63	<	}
64	<	catch (NullPointerException success) {}
65	<	}
66	<	public void testAddAll2(){
67	<	try {
68	<	SynchronousQueue q = new SynchronousQueue();
69	<	Integer[] ints = new Integer[N];
70	<	q.addAll(Arrays.asList(ints));
71	<	fail("Cannot add null elements");
72	<	}
73	<	catch (NullPointerException success) {}
74	<	}
75	<	public void testAddAll4(){
76	<	try {
77	<	SynchronousQueue q = new SynchronousQueue();
78	<	Integer[] ints = new Integer[N];
79	<	for (int i = 0; i < N; ++i)
80	<	ints[i] = new Integer(i);
81	<	q.addAll(Arrays.asList(ints));
82	<	fail("Cannot add with insufficient capacity");
83	<	}
84	<	catch (IllegalStateException success) {}
85	<	}
86	<
87	<	public void testPutNull() {
88	<	try {
89	<	SynchronousQueue q = new SynchronousQueue();
90	<	q.put(null);
91	<	fail("put should throw NPE");
92	<	}
93	<	catch (NullPointerException success){
94	<	}
95	<	catch (InterruptedException ie) {
96	<	fail("Unexpected exception");
97	<	}
98	<	}
99	<
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	<	}});
110	<	t.start();
111	<	try {
112	<	Thread.sleep(SHORT_DELAY_MS);
113	<	t.interrupt();
114	<	t.join();
115	<	}
116	<	catch (InterruptedException ie) {
117	<	fail("Unexpected exception");
118	<	}
57	>	assertFalse(q.offer(zero));
58		}
59
60	<	public void testPutWithTake() {
61	<	final SynchronousQueue q = new SynchronousQueue();
62	<	Thread t = new Thread(new Runnable() {
63	<	public void run(){
64	<	int added = 0;
65	<	try {
66	<	q.put(new Object());
67	<	++added;
68	<	q.put(new Object());
69	<	++added;
70	<	q.put(new Object());
71	<	++added;
72	<	q.put(new Object());
73	<	++added;
74	<	fail("Should block");
75	<	} catch (InterruptedException e){
76	<	assertTrue(added >= 1);
77	<	}
139	<	}
140	<	});
60	>	/**
61	>	* offer fails if no active taker
62	>	*/
63	>	public void testOffer()      { testOffer(false); }
64	>	public void testOffer_fair() { testOffer(true); }
65	>	public void testOffer(boolean fair) {
66	>	SynchronousQueue q = new SynchronousQueue(fair);
67	>	assertFalse(q.offer(one));
68	>	}
69	>
70	>	/**
71	>	* add throws IllegalStateException if no active taker
72	>	*/
73	>	public void testAdd()      { testAdd(false); }
74	>	public void testAdd_fair() { testAdd(true); }
75	>	public void testAdd(boolean fair) {
76	>	SynchronousQueue q = new SynchronousQueue(fair);
77	>	assertEquals(0, q.remainingCapacity());
78		try {
79	<	t.start();
80	<	Thread.sleep(SHORT_DELAY_MS);
81	<	q.take();
82	<	Thread.sleep(SHORT_DELAY_MS);
83	<	t.interrupt();
84	<	t.join();
85	<	} catch (Exception e){
86	<	fail("Unexpected exception");
87	<	}
88	<	}
79	>	q.add(one);
80	>	shouldThrow();
81	>	} catch (IllegalStateException success) {}
82	>	}
83	>
84	>	/**
85	>	* addAll(this) throws IllegalArgumentException
86	>	*/
87	>	public void testAddAll_self()      { testAddAll_self(false); }
88	>	public void testAddAll_self_fair() { testAddAll_self(true); }
89	>	public void testAddAll_self(boolean fair) {
90	>	SynchronousQueue q = new SynchronousQueue(fair);
91	>	try {
92	>	q.addAll(q);
93	>	shouldThrow();
94	>	} catch (IllegalArgumentException success) {}
95	>	}
96	>
97	>	/**
98	>	* addAll throws ISE if no active taker
99	>	*/
100	>	public void testAddAll_ISE()      { testAddAll_ISE(false); }
101	>	public void testAddAll_ISE_fair() { testAddAll_ISE(true); }
102	>	public void testAddAll_ISE(boolean fair) {
103	>	SynchronousQueue q = new SynchronousQueue(fair);
104	>	Integer[] ints = new Integer[1];
105	>	for (int i = 0; i < ints.length; i++)
106	>	ints[i] = i;
107	>	Collection<Integer> coll = Arrays.asList(ints);
108	>	try {
109	>	q.addAll(coll);
110	>	shouldThrow();
111	>	} catch (IllegalStateException success) {}
112	>	}
113	>
114	>	/**
115	>	* put blocks interruptibly if no active taker
116	>	*/
117	>	public void testBlockingPut()      { testBlockingPut(false); }
118	>	public void testBlockingPut_fair() { testBlockingPut(true); }
119	>	public void testBlockingPut(boolean fair) {
120	>	final SynchronousQueue q = new SynchronousQueue(fair);
121	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
122	>	Thread t = newStartedThread(new CheckedRunnable() {
123	>	public void realRun() throws InterruptedException {
124	>	Thread.currentThread().interrupt();
125	>	try {
126	>	q.put(99);
127	>	shouldThrow();
128	>	} catch (InterruptedException success) {}
129	>	assertFalse(Thread.interrupted());
130
131	<	public void testTimedOffer() {
132	<	final SynchronousQueue q = new SynchronousQueue();
133	<	Thread t = new Thread(new Runnable() {
134	<	public void run(){
135	<	try {
136	<
137	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
138	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
139	<	fail("Should block");
140	<	} catch (InterruptedException success){}
141	<	}
142	<	});
143	<
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	<	}
131	>	pleaseInterrupt.countDown();
132	>	try {
133	>	q.put(99);
134	>	shouldThrow();
135	>	} catch (InterruptedException success) {}
136	>	assertFalse(Thread.interrupted());
137	>	}});
138	>
139	>	await(pleaseInterrupt);
140	>	assertThreadStaysAlive(t);
141	>	t.interrupt();
142	>	awaitTermination(t);
143	>	assertEquals(0, q.remainingCapacity());
144		}
145
146	+	/**
147	+	* put blocks interruptibly waiting for take
148	+	*/
149	+	public void testPutWithTake()      { testPutWithTake(false); }
150	+	public void testPutWithTake_fair() { testPutWithTake(true); }
151	+	public void testPutWithTake(boolean fair) {
152	+	final SynchronousQueue q = new SynchronousQueue(fair);
153	+	final CountDownLatch pleaseTake = new CountDownLatch(1);
154	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
155	+	Thread t = newStartedThread(new CheckedRunnable() {
156	+	public void realRun() throws InterruptedException {
157	+	pleaseTake.countDown();
158	+	q.put(one);
159
160	<	public void testTakeFromEmpty() {
161	<	final SynchronousQueue q = new SynchronousQueue();
162	<	Thread t = new Thread(new Runnable() {
163	<	public void run(){
164	<	try {
165	<	q.take();
166	<	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	<	}
195	<	}
196	<
197	<	public void testPoll(){
198	<	SynchronousQueue q = new SynchronousQueue();
199	<	assertNull(q.poll());
200	<	}
160	>	pleaseInterrupt.countDown();
161	>	try {
162	>	q.put(99);
163	>	shouldThrow();
164	>	} catch (InterruptedException success) {}
165	>	assertFalse(Thread.interrupted());
166	>	}});
167
168	<	public void testTimedPoll0() {
169	<	try {
170	<	SynchronousQueue q = new SynchronousQueue();
171	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
206	<	} catch (InterruptedException e){
207	<	fail("Unexpected exception");
208	<	}
209	<	}
168	>	await(pleaseTake);
169	>	assertEquals(0, q.remainingCapacity());
170	>	try { assertSame(one, q.take()); }
171	>	catch (InterruptedException e) { threadUnexpectedException(e); }
172
173	<	public void testTimedPoll() {
174	<	try {
175	<	SynchronousQueue q = new SynchronousQueue();
176	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
177	<	} catch (InterruptedException e){
216	<	fail("Unexpected exception");
217	<	}
218	<	}
219	<
220	<	public void testInterruptedTimedPoll(){
221	<	Thread t = new Thread(new Runnable() {
222	<	public void run() {
223	<	try {
224	<	SynchronousQueue q = new SynchronousQueue();
225	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
226	<	} catch (InterruptedException success){
227	<	}
228	<	}});
229	<	t.start();
230	<	try {
231	<	Thread.sleep(SHORT_DELAY_MS);
232	<	t.interrupt();
233	<	t.join();
234	<	}
235	<	catch (InterruptedException ie) {
236	<	fail("Unexpected exception");
237	<	}
173	>	await(pleaseInterrupt);
174	>	assertThreadStaysAlive(t);
175	>	t.interrupt();
176	>	awaitTermination(t);
177	>	assertEquals(0, q.remainingCapacity());
178		}
179
180	<	public void testTimedPollWithOffer(){
181	<	final SynchronousQueue q = new SynchronousQueue();
182	<	Thread t = new Thread(new Runnable() {
183	<	public void run(){
184	<	try {
185	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
186	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
187	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
188	<	fail("Should block");
189	<	} catch (InterruptedException success) { }
190	<	}
191	<	});
192	<	try {
193	<	t.start();
194	<	Thread.sleep(SHORT_DELAY_MS * 2);
195	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
196	<	t.interrupt();
197	<	t.join();
198	<	} catch (Exception e){
199	<	fail("Unexpected exception");
200	<	}
201	<	}
202	<
180	>	/**
181	>	* timed offer times out if elements not taken
182	>	*/
183	>	public void testTimedOffer()      { testTimedOffer(false); }
184	>	public void testTimedOffer_fair() { testTimedOffer(true); }
185	>	public void testTimedOffer(boolean fair) {
186	>	final SynchronousQueue q = new SynchronousQueue(fair);
187	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
188	>	Thread t = newStartedThread(new CheckedRunnable() {
189	>	public void realRun() throws InterruptedException {
190	>	long startTime = System.nanoTime();
191	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
192	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
193	>	pleaseInterrupt.countDown();
194	>	try {
195	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
196	>	shouldThrow();
197	>	} catch (InterruptedException success) {}
198	>	}});
199	>
200	>	await(pleaseInterrupt);
201	>	assertThreadStaysAlive(t);
202	>	t.interrupt();
203	>	awaitTermination(t);
204	>	}
205	>
206	>	/**
207	>	* poll return null if no active putter
208	>	*/
209	>	public void testPoll()      { testPoll(false); }
210	>	public void testPoll_fair() { testPoll(true); }
211	>	public void testPoll(boolean fair) {
212	>	final SynchronousQueue q = new SynchronousQueue(fair);
213	>	assertNull(q.poll());
214	>	}
215	>
216	>	/**
217	>	* timed poll with zero timeout times out if no active putter
218	>	*/
219	>	public void testTimedPoll0()      { testTimedPoll0(false); }
220	>	public void testTimedPoll0_fair() { testTimedPoll0(true); }
221	>	public void testTimedPoll0(boolean fair) {
222	>	final SynchronousQueue q = new SynchronousQueue(fair);
223	>	try { assertNull(q.poll(0, MILLISECONDS)); }
224	>	catch (InterruptedException e) { threadUnexpectedException(e); }
225	>	}
226	>
227	>	/**
228	>	* timed poll with nonzero timeout times out if no active putter
229	>	*/
230	>	public void testTimedPoll()      { testTimedPoll(false); }
231	>	public void testTimedPoll_fair() { testTimedPoll(true); }
232	>	public void testTimedPoll(boolean fair) {
233	>	final SynchronousQueue q = new SynchronousQueue(fair);
234	>	long startTime = System.nanoTime();
235	>	try { assertNull(q.poll(timeoutMillis(), MILLISECONDS)); }
236	>	catch (InterruptedException e) { threadUnexpectedException(e); }
237	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
238	>	}
239	>
240	>	/**
241	>	* timed poll before a delayed offer times out, returning null;
242	>	* after offer succeeds; on interruption throws
243	>	*/
244	>	public void testTimedPollWithOffer()      { testTimedPollWithOffer(false); }
245	>	public void testTimedPollWithOffer_fair() { testTimedPollWithOffer(true); }
246	>	public void testTimedPollWithOffer(boolean fair) {
247	>	final SynchronousQueue q = new SynchronousQueue(fair);
248	>	final CountDownLatch pleaseOffer = new CountDownLatch(1);
249	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
250	>	Thread t = newStartedThread(new CheckedRunnable() {
251	>	public void realRun() throws InterruptedException {
252	>	long startTime = System.nanoTime();
253	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
254	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
255	>
256	>	pleaseOffer.countDown();
257	>	startTime = System.nanoTime();
258	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
259	>	assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS);
260
261	<	public void testPeek(){
262	<	SynchronousQueue q = new SynchronousQueue();
263	<	assertNull(q.peek());
264	<	}
261	>	Thread.currentThread().interrupt();
262	>	try {
263	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
264	>	shouldThrow();
265	>	} catch (InterruptedException success) {}
266	>	assertFalse(Thread.interrupted());
267
268	<	public void testElement(){
269	<	SynchronousQueue q = new SynchronousQueue();
268	>	pleaseInterrupt.countDown();
269	>	try {
270	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
271	>	shouldThrow();
272	>	} catch (InterruptedException success) {}
273	>	assertFalse(Thread.interrupted());
274	>	}});
275	>
276	>	await(pleaseOffer);
277	>	long startTime = System.nanoTime();
278	>	try { assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS)); }
279	>	catch (InterruptedException e) { threadUnexpectedException(e); }
280	>	assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS);
281	>
282	>	await(pleaseInterrupt);
283	>	assertThreadStaysAlive(t);
284	>	t.interrupt();
285	>	awaitTermination(t);
286	>	}
287	>
288	>	/**
289	>	* peek() returns null if no active putter
290	>	*/
291	>	public void testPeek()      { testPeek(false); }
292	>	public void testPeek_fair() { testPeek(true); }
293	>	public void testPeek(boolean fair) {
294	>	final SynchronousQueue q = new SynchronousQueue(fair);
295	>	assertNull(q.peek());
296	>	}
297	>
298	>	/**
299	>	* element() throws NoSuchElementException if no active putter
300	>	*/
301	>	public void testElement()      { testElement(false); }
302	>	public void testElement_fair() { testElement(true); }
303	>	public void testElement(boolean fair) {
304	>	final SynchronousQueue q = new SynchronousQueue(fair);
305		try {
306		q.element();
307	<	fail("no such element");
308	<	}
275	<	catch (NoSuchElementException success) {}
307	>	shouldThrow();
308	>	} catch (NoSuchElementException success) {}
309		}
310
311	<	public void testRemove(){
312	<	SynchronousQueue q = new SynchronousQueue();
311	>	/**
312	>	* remove() throws NoSuchElementException if no active putter
313	>	*/
314	>	public void testRemove()      { testRemove(false); }
315	>	public void testRemove_fair() { testRemove(true); }
316	>	public void testRemove(boolean fair) {
317	>	final SynchronousQueue q = new SynchronousQueue(fair);
318		try {
319		q.remove();
320	<	fail("remove should throw");
321	<	} catch (NoSuchElementException success){
284	<	}
320	>	shouldThrow();
321	>	} catch (NoSuchElementException success) {}
322		}
323
324	<	public void testRemoveElement(){
325	<	SynchronousQueue q = new SynchronousQueue();
326	<	for (int i = 1; i < N; i+=2) {
327	<	assertFalse(q.remove(new Integer(i)));
328	<	}
329	<	assertTrue(q.isEmpty());
330	<	}
331	<
332	<	public void testContains(){
333	<	SynchronousQueue q = new SynchronousQueue();
334	<	for (int i = 0; i < N; ++i) {
335	<	assertFalse(q.contains(new Integer(i)));
336	<	}
337	<	}
338	<
339	<	public void testClear(){
340	<	SynchronousQueue q = new SynchronousQueue();
324	>	/**
325	>	* contains returns false
326	>	*/
327	>	public void testContains()      { testContains(false); }
328	>	public void testContains_fair() { testContains(true); }
329	>	public void testContains(boolean fair) {
330	>	final SynchronousQueue q = new SynchronousQueue(fair);
331	>	assertFalse(q.contains(zero));
332	>	}
333	>
334	>	/**
335	>	* clear ensures isEmpty
336	>	*/
337	>	public void testClear()      { testClear(false); }
338	>	public void testClear_fair() { testClear(true); }
339	>	public void testClear(boolean fair) {
340	>	final SynchronousQueue q = new SynchronousQueue(fair);
341		q.clear();
342		assertTrue(q.isEmpty());
343		}
344
345	<	public void testContainsAll(){
346	<	SynchronousQueue q = new SynchronousQueue();
345	>	/**
346	>	* containsAll returns false unless empty
347	>	*/
348	>	public void testContainsAll()      { testContainsAll(false); }
349	>	public void testContainsAll_fair() { testContainsAll(true); }
350	>	public void testContainsAll(boolean fair) {
351	>	final SynchronousQueue q = new SynchronousQueue(fair);
352		Integer[] empty = new Integer[0];
353	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
354	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
353	>	assertTrue(q.containsAll(Arrays.asList(empty)));
354	>	Integer[] ints = new Integer[1]; ints[0] = zero;
355		assertFalse(q.containsAll(Arrays.asList(ints)));
356		}
357
358	<	public void testRetainAll(){
359	<	SynchronousQueue q = new SynchronousQueue();
358	>	/**
359	>	* retainAll returns false
360	>	*/
361	>	public void testRetainAll()      { testRetainAll(false); }
362	>	public void testRetainAll_fair() { testRetainAll(true); }
363	>	public void testRetainAll(boolean fair) {
364	>	final SynchronousQueue q = new SynchronousQueue(fair);
365		Integer[] empty = new Integer[0];
366	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
367	<	q.retainAll(Arrays.asList(ints));
368	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
322	<	assertFalse(q.containsAll(Arrays.asList(ints)));
366	>	assertFalse(q.retainAll(Arrays.asList(empty)));
367	>	Integer[] ints = new Integer[1]; ints[0] = zero;
368	>	assertFalse(q.retainAll(Arrays.asList(ints)));
369		}
370
371	<	public void testRemoveAll(){
372	<	SynchronousQueue q = new SynchronousQueue();
371	>	/**
372	>	* removeAll returns false
373	>	*/
374	>	public void testRemoveAll()      { testRemoveAll(false); }
375	>	public void testRemoveAll_fair() { testRemoveAll(true); }
376	>	public void testRemoveAll(boolean fair) {
377	>	final SynchronousQueue q = new SynchronousQueue(fair);
378		Integer[] empty = new Integer[0];
379	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
380	<	q.removeAll(Arrays.asList(ints));
330	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
379	>	assertFalse(q.removeAll(Arrays.asList(empty)));
380	>	Integer[] ints = new Integer[1]; ints[0] = zero;
381		assertFalse(q.containsAll(Arrays.asList(ints)));
382		}
383
384	<
385	<	public void testToArray(){
386	<	SynchronousQueue q = new SynchronousQueue();
387	<	Object[] o = q.toArray();
388	<	assertEquals(o.length, 0);
389	<	}
390	<
391	<	public void testToArray2(){
392	<	SynchronousQueue q = new SynchronousQueue();
393	<	Integer[] ints = new Integer[1];
394	<	assertNull(ints[0]);
395	<	}
396	<
397	<	public void testIterator(){
398	<	SynchronousQueue q = new SynchronousQueue();
399	<	Iterator it = q.iterator();
384	>	/**
385	>	* toArray is empty
386	>	*/
387	>	public void testToArray()      { testToArray(false); }
388	>	public void testToArray_fair() { testToArray(true); }
389	>	public void testToArray(boolean fair) {
390	>	final SynchronousQueue q = new SynchronousQueue(fair);
391	>	Object[] o = q.toArray();
392	>	assertEquals(0, o.length);
393	>	}
394	>
395	>	/**
396	>	* toArray(Integer array) returns its argument with the first
397	>	* element (if present) nulled out
398	>	*/
399	>	public void testToArray2()      { testToArray2(false); }
400	>	public void testToArray2_fair() { testToArray2(true); }
401	>	public void testToArray2(boolean fair) {
402	>	final SynchronousQueue<Integer> q
403	>	= new SynchronousQueue<Integer>(fair);
404	>	Integer[] a;
405	>
406	>	a = new Integer[0];
407	>	assertSame(a, q.toArray(a));
408	>
409	>	a = new Integer[3];
410	>	Arrays.fill(a, 42);
411	>	assertSame(a, q.toArray(a));
412	>	assertNull(a[0]);
413	>	for (int i = 1; i < a.length; i++)
414	>	assertEquals(42, (int) a[i]);
415	>	}
416	>
417	>	/**
418	>	* toArray(null) throws NPE
419	>	*/
420	>	public void testToArray_null()      { testToArray_null(false); }
421	>	public void testToArray_null_fair() { testToArray_null(true); }
422	>	public void testToArray_null(boolean fair) {
423	>	final SynchronousQueue q = new SynchronousQueue(fair);
424	>	try {
425	>	Object o[] = q.toArray(null);
426	>	shouldThrow();
427	>	} catch (NullPointerException success) {}
428	>	}
429	>
430	>	/**
431	>	* iterator does not traverse any elements
432	>	*/
433	>	public void testIterator()      { testIterator(false); }
434	>	public void testIterator_fair() { testIterator(true); }
435	>	public void testIterator(boolean fair) {
436	>	final SynchronousQueue q = new SynchronousQueue(fair);
437	>	Iterator it = q.iterator();
438		assertFalse(it.hasNext());
439		try {
440		Object x = it.next();
441	<	fail("should throw");
442	<	}
355	<	catch (NoSuchElementException success) {}
441	>	shouldThrow();
442	>	} catch (NoSuchElementException success) {}
443		}
444
445	<	public void testIteratorRemove(){
446	<	SynchronousQueue q = new SynchronousQueue();
447	<	Iterator it = q.iterator();
445	>	/**
446	>	* iterator remove throws ISE
447	>	*/
448	>	public void testIteratorRemove()      { testIteratorRemove(false); }
449	>	public void testIteratorRemove_fair() { testIteratorRemove(true); }
450	>	public void testIteratorRemove(boolean fair) {
451	>	final SynchronousQueue q = new SynchronousQueue(fair);
452	>	Iterator it = q.iterator();
453		try {
454		it.remove();
455	<	fail("should throw");
456	<	}
365	<	catch (IllegalStateException success) {}
455	>	shouldThrow();
456	>	} catch (IllegalStateException success) {}
457		}
458
459	<	public void testToString(){
460	<	SynchronousQueue q = new SynchronousQueue();
459	>	/**
460	>	* toString returns a non-null string
461	>	*/
462	>	public void testToString()      { testToString(false); }
463	>	public void testToString_fair() { testToString(true); }
464	>	public void testToString(boolean fair) {
465	>	final SynchronousQueue q = new SynchronousQueue(fair);
466		String s = q.toString();
467	<	assertTrue(s != null);
468	<	}
373	<
467	>	assertNotNull(s);
468	>	}
469
470	<	public void testOfferInExecutor() {
471	<	final SynchronousQueue q = new SynchronousQueue();
470	>	/**
471	>	* offer transfers elements across Executor tasks
472	>	*/
473	>	public void testOfferInExecutor()      { testOfferInExecutor(false); }
474	>	public void testOfferInExecutor_fair() { testOfferInExecutor(true); }
475	>	public void testOfferInExecutor(boolean fair) {
476	>	final SynchronousQueue q = new SynchronousQueue(fair);
477		ExecutorService executor = Executors.newFixedThreadPool(2);
478	<	final Integer one = new Integer(1);
478	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
479
480	<	executor.execute(new Runnable() {
481	<	public void run() {
480	>	executor.execute(new CheckedRunnable() {
481	>	public void realRun() throws InterruptedException {
482		assertFalse(q.offer(one));
483	<	try {
484	<	assertTrue(q.offer(one, MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
485	<	assertEquals(0, q.remainingCapacity());
486	<	}
487	<	catch (InterruptedException e) {
488	<	fail("should not be interrupted");
489	<	}
490	<	}
491	<	});
492	<
493	<	executor.execute(new Runnable() {
494	<	public void run() {
495	<	try {
496	<	Thread.sleep(MEDIUM_DELAY_MS);
497	<	assertEquals(one, q.take());
498	<	}
499	<	catch (InterruptedException e) {
500	<	fail("should not be interrupted");
501	<	}
502	<	}
503	<	});
504	<
405	<	executor.shutdown();
406	<
407	<	}
408	<
409	<	public void testPollInExecutor() {
410	<
411	<	final SynchronousQueue q = new SynchronousQueue();
412	<
483	>	threadsStarted.await();
484	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
485	>	assertEquals(0, q.remainingCapacity());
486	>	}});
487	>
488	>	executor.execute(new CheckedRunnable() {
489	>	public void realRun() throws InterruptedException {
490	>	threadsStarted.await();
491	>	assertSame(one, q.take());
492	>	}});
493	>
494	>	joinPool(executor);
495	>	}
496	>
497	>	/**
498	>	* timed poll retrieves elements across Executor threads
499	>	*/
500	>	public void testPollInExecutor()      { testPollInExecutor(false); }
501	>	public void testPollInExecutor_fair() { testPollInExecutor(true); }
502	>	public void testPollInExecutor(boolean fair) {
503	>	final SynchronousQueue q = new SynchronousQueue(fair);
504	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
505		ExecutorService executor = Executors.newFixedThreadPool(2);
506	<
507	<	executor.execute(new Runnable() {
416	<	public void run() {
506	>	executor.execute(new CheckedRunnable() {
507	>	public void realRun() throws InterruptedException {
508		assertNull(q.poll());
509	<	try {
510	<	assertTrue(null != q.poll(MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
511	<	assertTrue(q.isEmpty());
512	<	}
513	<	catch (InterruptedException e) {
514	<	fail("should not be interrupted");
515	<	}
516	<	}
517	<	});
518	<
519	<	executor.execute(new Runnable() {
520	<	public void run() {
521	<	try {
522	<	Thread.sleep(MEDIUM_DELAY_MS);
523	<	q.put(new Integer(1));
524	<	}
525	<	catch (InterruptedException e) {
435	<	fail("should not be interrupted");
436	<	}
437	<	}
438	<	});
439	<
440	<	executor.shutdown();
441	<
442	<	}
443	<
509	>	threadsStarted.await();
510	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
511	>	assertTrue(q.isEmpty());
512	>	}});
513	>
514	>	executor.execute(new CheckedRunnable() {
515	>	public void realRun() throws InterruptedException {
516	>	threadsStarted.await();
517	>	q.put(one);
518	>	}});
519	>
520	>	joinPool(executor);
521	>	}
522	>
523	>	/**
524	>	* a deserialized serialized queue is usable
525	>	*/
526		public void testSerialization() {
527	<	SynchronousQueue q = new SynchronousQueue();
528	<	try {
529	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
530	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
531	<	out.writeObject(q);
532	<	out.close();
533	<
534	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
535	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
536	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
537	<	assertEquals(q.size(), r.size());
538	<	while (!q.isEmpty())
539	<	assertEquals(q.remove(), r.remove());
540	<	} catch(Exception e){
459	<	fail("unexpected exception");
527	>	final SynchronousQueue x = new SynchronousQueue();
528	>	final SynchronousQueue y = new SynchronousQueue(false);
529	>	final SynchronousQueue z = new SynchronousQueue(true);
530	>	assertSerialEquals(x, y);
531	>	assertNotSerialEquals(x, z);
532	>	SynchronousQueue[] qs = { x, y, z };
533	>	for (SynchronousQueue q : qs) {
534	>	SynchronousQueue clone = serialClone(q);
535	>	assertNotSame(q, clone);
536	>	assertSerialEquals(q, clone);
537	>	assertTrue(clone.isEmpty());
538	>	assertEquals(0, clone.size());
539	>	assertEquals(0, clone.remainingCapacity());
540	>	assertFalse(clone.offer(zero));
541		}
542		}
543
544	+	/**
545	+	* drainTo(c) of empty queue doesn't transfer elements
546	+	*/
547	+	public void testDrainTo()      { testDrainTo(false); }
548	+	public void testDrainTo_fair() { testDrainTo(true); }
549	+	public void testDrainTo(boolean fair) {
550	+	final SynchronousQueue q = new SynchronousQueue(fair);
551	+	ArrayList l = new ArrayList();
552	+	q.drainTo(l);
553	+	assertEquals(0, q.size());
554	+	assertEquals(0, l.size());
555	+	}
556	+
557	+	/**
558	+	* drainTo empties queue, unblocking a waiting put.
559	+	*/
560	+	public void testDrainToWithActivePut()      { testDrainToWithActivePut(false); }
561	+	public void testDrainToWithActivePut_fair() { testDrainToWithActivePut(true); }
562	+	public void testDrainToWithActivePut(boolean fair) {
563	+	final SynchronousQueue q = new SynchronousQueue(fair);
564	+	Thread t = newStartedThread(new CheckedRunnable() {
565	+	public void realRun() throws InterruptedException {
566	+	q.put(one);
567	+	}});
568	+
569	+	ArrayList l = new ArrayList();
570	+	long startTime = System.nanoTime();
571	+	while (l.isEmpty()) {
572	+	q.drainTo(l);
573	+	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
574	+	fail("timed out");
575	+	Thread.yield();
576	+	}
577	+	assertTrue(l.size() == 1);
578	+	assertSame(one, l.get(0));
579	+	awaitTermination(t);
580	+	}
581	+
582	+	/**
583	+	* drainTo(c, n) empties up to n elements of queue into c
584	+	*/
585	+	public void testDrainToN() throws InterruptedException {
586	+	final SynchronousQueue q = new SynchronousQueue();
587	+	Thread t1 = newStartedThread(new CheckedRunnable() {
588	+	public void realRun() throws InterruptedException {
589	+	q.put(one);
590	+	}});
591	+
592	+	Thread t2 = newStartedThread(new CheckedRunnable() {
593	+	public void realRun() throws InterruptedException {
594	+	q.put(two);
595	+	}});
596	+
597	+	ArrayList l = new ArrayList();
598	+	delay(SHORT_DELAY_MS);
599	+	q.drainTo(l, 1);
600	+	assertEquals(1, l.size());
601	+	q.drainTo(l, 1);
602	+	assertEquals(2, l.size());
603	+	assertTrue(l.contains(one));
604	+	assertTrue(l.contains(two));
605	+	awaitTermination(t1);
606	+	awaitTermination(t2);
607	+	}
608	+
609		}

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