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root/jsr166/jsr166/src/test/tck/SynchronousQueueTest.java

Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 20:39:11 2003 UTC vs.
Revision 1.56 by jsr166, Sun May 14 00:56:43 2017 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.*;
9	<	import java.util.*;
10	<	import java.util.concurrent.*;
11	<	import java.io.*;
12	<
13	<	public class SynchronousQueueTest extends TestCase {
14	<
15	<	private final static int N = 1;
16	<	private static long SHORT_DELAY_MS = 100;
17	<	private static long MEDIUM_DELAY_MS = 1000;
18	<	private static long LONG_DELAY_MS = 10000;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10
11	<	public static void main(String[] args) {
12	<	junit.textui.TestRunner.run (suite());
13	<	}
11	>	import java.util.ArrayList;
12	>	import java.util.Arrays;
13	>	import java.util.Collection;
14	>	import java.util.Iterator;
15	>	import java.util.NoSuchElementException;
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
22	<	public static Test suite() {
25	<	return new TestSuite(SynchronousQueueTest.class);
26	<	}
22	>	import junit.framework.Test;
23
24	<	public void testEmptyFull() {
29	<	SynchronousQueue q = new SynchronousQueue();
30	<	assertTrue(q.isEmpty());
31	<	assertEquals(0, q.size());
32	<	assertEquals(0, q.remainingCapacity());
33	<	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	<	}
24	>	public class SynchronousQueueTest extends JSR166TestCase {
25
26	<	public void testBlockingPut(){
27	<	Thread t = new Thread(new Runnable() {
28	<	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");
26	>	public static class Fair extends BlockingQueueTest {
27	>	protected BlockingQueue emptyCollection() {
28	>	return new SynchronousQueue(true);
29		}
30		}
31
32	<	public void testPutWithTake() {
33	<	final SynchronousQueue q = new SynchronousQueue();
34	<	Thread t = new Thread(new Runnable() {
124	<	public void run(){
125	<	int added = 0;
126	<	try {
127	<	q.put(new Object());
128	<	++added;
129	<	q.put(new Object());
130	<	++added;
131	<	q.put(new Object());
132	<	++added;
133	<	q.put(new Object());
134	<	++added;
135	<	fail("Should block");
136	<	} catch (InterruptedException e){
137	<	assertTrue(added >= 1);
138	<	}
139	<	}
140	<	});
141	<	try {
142	<	t.start();
143	<	Thread.sleep(SHORT_DELAY_MS);
144	<	q.take();
145	<	Thread.sleep(SHORT_DELAY_MS);
146	<	t.interrupt();
147	<	t.join();
148	<	} catch (Exception e){
149	<	fail("Unexpected exception");
32	>	public static class NonFair extends BlockingQueueTest {
33	>	protected BlockingQueue emptyCollection() {
34	>	return new SynchronousQueue(false);
35		}
36		}
37
38	<	public void testTimedOffer() {
39	<	final SynchronousQueue q = new SynchronousQueue();
155	<	Thread t = new Thread(new Runnable() {
156	<	public void run(){
157	<	try {
158	<
159	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
160	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
161	<	fail("Should block");
162	<	} catch (InterruptedException success){}
163	<	}
164	<	});
165	<
166	<	try {
167	<	t.start();
168	<	Thread.sleep(SHORT_DELAY_MS);
169	<	t.interrupt();
170	<	t.join();
171	<	} catch (Exception e){
172	<	fail("Unexpected exception");
173	<	}
38	>	public static void main(String[] args) {
39	>	main(suite(), args);
40		}
41
42	<
43	<	public void testTakeFromEmpty() {
44	<	final SynchronousQueue q = new SynchronousQueue();
45	<	Thread t = new Thread(new Runnable() {
180	<	public void run(){
181	<	try {
182	<	q.take();
183	<	fail("Should block");
184	<	} catch (InterruptedException success){ }
185	<	}
186	<	});
187	<	try {
188	<	t.start();
189	<	Thread.sleep(SHORT_DELAY_MS);
190	<	t.interrupt();
191	<	t.join();
192	<	} catch (Exception e){
193	<	fail("Unexpected exception");
194	<	}
42	>	public static Test suite() {
43	>	return newTestSuite(SynchronousQueueTest.class,
44	>	new Fair().testSuite(),
45	>	new NonFair().testSuite());
46		}
47
48	<	public void testPoll(){
49	<	SynchronousQueue q = new SynchronousQueue();
50	<	assertNull(q.poll());
48	>	/**
49	>	* Any SynchronousQueue is both empty and full
50	>	*/
51	>	public void testEmptyFull()      { testEmptyFull(false); }
52	>	public void testEmptyFull_fair() { testEmptyFull(true); }
53	>	public void testEmptyFull(boolean fair) {
54	>	final SynchronousQueue q = new SynchronousQueue(fair);
55	>	assertTrue(q.isEmpty());
56	>	assertEquals(0, q.size());
57	>	assertEquals(0, q.remainingCapacity());
58	>	assertFalse(q.offer(zero));
59		}
60
61	<	public void testTimedPoll0() {
61	>	/**
62	>	* offer fails if no active taker
63	>	*/
64	>	public void testOffer()      { testOffer(false); }
65	>	public void testOffer_fair() { testOffer(true); }
66	>	public void testOffer(boolean fair) {
67	>	SynchronousQueue q = new SynchronousQueue(fair);
68	>	assertFalse(q.offer(one));
69	>	}
70	>
71	>	/**
72	>	* add throws IllegalStateException if no active taker
73	>	*/
74	>	public void testAdd()      { testAdd(false); }
75	>	public void testAdd_fair() { testAdd(true); }
76	>	public void testAdd(boolean fair) {
77	>	SynchronousQueue q = new SynchronousQueue(fair);
78	>	assertEquals(0, q.remainingCapacity());
79		try {
80	<	SynchronousQueue q = new SynchronousQueue();
81	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
82	<	} catch (InterruptedException e){
83	<	fail("Unexpected exception");
84	<	}
85	<	}
80	>	q.add(one);
81	>	shouldThrow();
82	>	} catch (IllegalStateException success) {}
83	>	}
84	>
85	>	/**
86	>	* addAll(this) throws IllegalArgumentException
87	>	*/
88	>	public void testAddAll_self()      { testAddAll_self(false); }
89	>	public void testAddAll_self_fair() { testAddAll_self(true); }
90	>	public void testAddAll_self(boolean fair) {
91	>	SynchronousQueue q = new SynchronousQueue(fair);
92	>	try {
93	>	q.addAll(q);
94	>	shouldThrow();
95	>	} catch (IllegalArgumentException success) {}
96	>	}
97	>
98	>	/**
99	>	* addAll throws ISE if no active taker
100	>	*/
101	>	public void testAddAll_ISE()      { testAddAll_ISE(false); }
102	>	public void testAddAll_ISE_fair() { testAddAll_ISE(true); }
103	>	public void testAddAll_ISE(boolean fair) {
104	>	SynchronousQueue q = new SynchronousQueue(fair);
105	>	Integer[] ints = new Integer[1];
106	>	for (int i = 0; i < ints.length; i++)
107	>	ints[i] = i;
108	>	Collection<Integer> coll = Arrays.asList(ints);
109	>	try {
110	>	q.addAll(coll);
111	>	shouldThrow();
112	>	} catch (IllegalStateException success) {}
113	>	}
114	>
115	>	/**
116	>	* put blocks interruptibly if no active taker
117	>	*/
118	>	public void testBlockingPut()      { testBlockingPut(false); }
119	>	public void testBlockingPut_fair() { testBlockingPut(true); }
120	>	public void testBlockingPut(boolean fair) {
121	>	final SynchronousQueue q = new SynchronousQueue(fair);
122	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
123	>	Thread t = newStartedThread(new CheckedRunnable() {
124	>	public void realRun() throws InterruptedException {
125	>	Thread.currentThread().interrupt();
126	>	try {
127	>	q.put(99);
128	>	shouldThrow();
129	>	} catch (InterruptedException success) {}
130	>	assertFalse(Thread.interrupted());
131
132	<	public void testTimedPoll() {
133	<	try {
134	<	SynchronousQueue q = new SynchronousQueue();
135	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
136	<	} catch (InterruptedException e){
137	<	fail("Unexpected exception");
138	<	}
132	>	pleaseInterrupt.countDown();
133	>	try {
134	>	q.put(99);
135	>	shouldThrow();
136	>	} catch (InterruptedException success) {}
137	>	assertFalse(Thread.interrupted());
138	>	}});
139	>
140	>	await(pleaseInterrupt);
141	>	assertThreadBlocks(t, Thread.State.WAITING);
142	>	t.interrupt();
143	>	awaitTermination(t);
144	>	assertEquals(0, q.remainingCapacity());
145		}
146
147	<	public void testInterruptedTimedPoll(){
148	<	Thread t = new Thread(new Runnable() {
149	<	public void run() {
150	<	try {
151	<	SynchronousQueue q = new SynchronousQueue();
152	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
153	<	} catch (InterruptedException success){
154	<	}
155	<	}});
156	<	t.start();
157	<	try {
158	<	Thread.sleep(SHORT_DELAY_MS);
159	<	t.interrupt();
233	<	t.join();
234	<	}
235	<	catch (InterruptedException ie) {
236	<	fail("Unexpected exception");
237	<	}
238	<	}
147	>	/**
148	>	* put blocks interruptibly waiting for take
149	>	*/
150	>	public void testPutWithTake()      { testPutWithTake(false); }
151	>	public void testPutWithTake_fair() { testPutWithTake(true); }
152	>	public void testPutWithTake(boolean fair) {
153	>	final SynchronousQueue q = new SynchronousQueue(fair);
154	>	final CountDownLatch pleaseTake = new CountDownLatch(1);
155	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
156	>	Thread t = newStartedThread(new CheckedRunnable() {
157	>	public void realRun() throws InterruptedException {
158	>	pleaseTake.countDown();
159	>	q.put(one);
160
161	<	public void testTimedPollWithOffer(){
162	<	final SynchronousQueue q = new SynchronousQueue();
163	<	Thread t = new Thread(new Runnable() {
164	<	public void run(){
165	<	try {
166	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
167	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
247	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
248	<	fail("Should block");
249	<	} catch (InterruptedException success) { }
250	<	}
251	<	});
252	<	try {
253	<	t.start();
254	<	Thread.sleep(SHORT_DELAY_MS * 2);
255	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
256	<	t.interrupt();
257	<	t.join();
258	<	} catch (Exception e){
259	<	fail("Unexpected exception");
260	<	}
261	<	}
161	>	pleaseInterrupt.countDown();
162	>	try {
163	>	q.put(99);
164	>	shouldThrow();
165	>	} catch (InterruptedException success) {}
166	>	assertFalse(Thread.interrupted());
167	>	}});
168
169	+	await(pleaseTake);
170	+	assertEquals(0, q.remainingCapacity());
171	+	try { assertSame(one, q.take()); }
172	+	catch (InterruptedException e) { threadUnexpectedException(e); }
173
174	<	public void testPeek(){
175	<	SynchronousQueue q = new SynchronousQueue();
176	<	assertNull(q.peek());
174	>	await(pleaseInterrupt);
175	>	assertThreadBlocks(t, Thread.State.WAITING);
176	>	t.interrupt();
177	>	awaitTermination(t);
178	>	assertEquals(0, q.remainingCapacity());
179		}
180
181	<	public void testElement(){
182	<	SynchronousQueue q = new SynchronousQueue();
181	>	/**
182	>	* timed offer times out if elements not taken
183	>	*/
184	>	public void testTimedOffer()      { testTimedOffer(false); }
185	>	public void testTimedOffer_fair() { testTimedOffer(true); }
186	>	public void testTimedOffer(boolean fair) {
187	>	final SynchronousQueue q = new SynchronousQueue(fair);
188	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
189	>	Thread t = newStartedThread(new CheckedRunnable() {
190	>	public void realRun() throws InterruptedException {
191	>	long startTime = System.nanoTime();
192	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
193	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
194	>	pleaseInterrupt.countDown();
195	>	try {
196	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
197	>	shouldThrow();
198	>	} catch (InterruptedException success) {}
199	>	assertFalse(Thread.interrupted());
200	>	}});
201	>
202	>	await(pleaseInterrupt);
203	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
204	>	t.interrupt();
205	>	awaitTermination(t);
206	>	}
207	>
208	>	/**
209	>	* poll return null if no active putter
210	>	*/
211	>	public void testPoll()      { testPoll(false); }
212	>	public void testPoll_fair() { testPoll(true); }
213	>	public void testPoll(boolean fair) {
214	>	final SynchronousQueue q = new SynchronousQueue(fair);
215	>	assertNull(q.poll());
216	>	}
217	>
218	>	/**
219	>	* timed poll with zero timeout times out if no active putter
220	>	*/
221	>	public void testTimedPoll0()      { testTimedPoll0(false); }
222	>	public void testTimedPoll0_fair() { testTimedPoll0(true); }
223	>	public void testTimedPoll0(boolean fair) {
224	>	final SynchronousQueue q = new SynchronousQueue(fair);
225	>	try { assertNull(q.poll(0, MILLISECONDS)); }
226	>	catch (InterruptedException e) { threadUnexpectedException(e); }
227	>	}
228	>
229	>	/**
230	>	* timed poll with nonzero timeout times out if no active putter
231	>	*/
232	>	public void testTimedPoll()      { testTimedPoll(false); }
233	>	public void testTimedPoll_fair() { testTimedPoll(true); }
234	>	public void testTimedPoll(boolean fair) {
235	>	final SynchronousQueue q = new SynchronousQueue(fair);
236	>	long startTime = System.nanoTime();
237	>	try { assertNull(q.poll(timeoutMillis(), MILLISECONDS)); }
238	>	catch (InterruptedException e) { threadUnexpectedException(e); }
239	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
240	>	}
241	>
242	>	/**
243	>	* timed poll before a delayed offer times out, returning null;
244	>	* after offer succeeds; on interruption throws
245	>	*/
246	>	public void testTimedPollWithOffer()      { testTimedPollWithOffer(false); }
247	>	public void testTimedPollWithOffer_fair() { testTimedPollWithOffer(true); }
248	>	public void testTimedPollWithOffer(boolean fair) {
249	>	final SynchronousQueue q = new SynchronousQueue(fair);
250	>	final CountDownLatch pleaseOffer = new CountDownLatch(1);
251	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
252	>	Thread t = newStartedThread(new CheckedRunnable() {
253	>	public void realRun() throws InterruptedException {
254	>	long startTime = System.nanoTime();
255	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
256	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
257	>
258	>	pleaseOffer.countDown();
259	>	startTime = System.nanoTime();
260	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
261	>
262	>	Thread.currentThread().interrupt();
263	>	try {
264	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
265	>	shouldThrow();
266	>	} catch (InterruptedException success) {}
267	>	assertFalse(Thread.interrupted());
268	>
269	>	pleaseInterrupt.countDown();
270	>	try {
271	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
272	>	shouldThrow();
273	>	} catch (InterruptedException success) {}
274	>	assertFalse(Thread.interrupted());
275	>
276	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
277	>	}});
278	>
279	>	await(pleaseOffer);
280	>	long startTime = System.nanoTime();
281	>	try { assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS)); }
282	>	catch (InterruptedException e) { threadUnexpectedException(e); }
283	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
284	>
285	>	await(pleaseInterrupt);
286	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
287	>	t.interrupt();
288	>	awaitTermination(t);
289	>	}
290	>
291	>	/**
292	>	* peek() returns null if no active putter
293	>	*/
294	>	public void testPeek()      { testPeek(false); }
295	>	public void testPeek_fair() { testPeek(true); }
296	>	public void testPeek(boolean fair) {
297	>	final SynchronousQueue q = new SynchronousQueue(fair);
298	>	assertNull(q.peek());
299	>	}
300	>
301	>	/**
302	>	* element() throws NoSuchElementException if no active putter
303	>	*/
304	>	public void testElement()      { testElement(false); }
305	>	public void testElement_fair() { testElement(true); }
306	>	public void testElement(boolean fair) {
307	>	final SynchronousQueue q = new SynchronousQueue(fair);
308		try {
309		q.element();
310	<	fail("no such element");
311	<	}
275	<	catch (NoSuchElementException success) {}
310	>	shouldThrow();
311	>	} catch (NoSuchElementException success) {}
312		}
313
314	<	public void testRemove(){
315	<	SynchronousQueue q = new SynchronousQueue();
314	>	/**
315	>	* remove() throws NoSuchElementException if no active putter
316	>	*/
317	>	public void testRemove()      { testRemove(false); }
318	>	public void testRemove_fair() { testRemove(true); }
319	>	public void testRemove(boolean fair) {
320	>	final SynchronousQueue q = new SynchronousQueue(fair);
321		try {
322		q.remove();
323	<	fail("remove should throw");
324	<	} catch (NoSuchElementException success){
284	<	}
323	>	shouldThrow();
324	>	} catch (NoSuchElementException success) {}
325		}
326
327	<	public void testRemoveElement(){
328	<	SynchronousQueue q = new SynchronousQueue();
329	<	for (int i = 1; i < N; i+=2) {
330	<	assertFalse(q.remove(new Integer(i)));
331	<	}
332	<	assertTrue(q.isEmpty());
333	<	}
334	<
335	<	public void testContains(){
336	<	SynchronousQueue q = new SynchronousQueue();
337	<	for (int i = 0; i < N; ++i) {
338	<	assertFalse(q.contains(new Integer(i)));
339	<	}
340	<	}
341	<
342	<	public void testClear(){
343	<	SynchronousQueue q = new SynchronousQueue();
327	>	/**
328	>	* contains returns false
329	>	*/
330	>	public void testContains()      { testContains(false); }
331	>	public void testContains_fair() { testContains(true); }
332	>	public void testContains(boolean fair) {
333	>	final SynchronousQueue q = new SynchronousQueue(fair);
334	>	assertFalse(q.contains(zero));
335	>	}
336	>
337	>	/**
338	>	* clear ensures isEmpty
339	>	*/
340	>	public void testClear()      { testClear(false); }
341	>	public void testClear_fair() { testClear(true); }
342	>	public void testClear(boolean fair) {
343	>	final SynchronousQueue q = new SynchronousQueue(fair);
344		q.clear();
345		assertTrue(q.isEmpty());
346		}
347
348	<	public void testContainsAll(){
349	<	SynchronousQueue q = new SynchronousQueue();
348	>	/**
349	>	* containsAll returns false unless empty
350	>	*/
351	>	public void testContainsAll()      { testContainsAll(false); }
352	>	public void testContainsAll_fair() { testContainsAll(true); }
353	>	public void testContainsAll(boolean fair) {
354	>	final SynchronousQueue q = new SynchronousQueue(fair);
355		Integer[] empty = new Integer[0];
356	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
357	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
356	>	assertTrue(q.containsAll(Arrays.asList(empty)));
357	>	Integer[] ints = new Integer[1]; ints[0] = zero;
358		assertFalse(q.containsAll(Arrays.asList(ints)));
359		}
360
361	<	public void testRetainAll(){
362	<	SynchronousQueue q = new SynchronousQueue();
361	>	/**
362	>	* retainAll returns false
363	>	*/
364	>	public void testRetainAll()      { testRetainAll(false); }
365	>	public void testRetainAll_fair() { testRetainAll(true); }
366	>	public void testRetainAll(boolean fair) {
367	>	final SynchronousQueue q = new SynchronousQueue(fair);
368		Integer[] empty = new Integer[0];
369	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
370	<	q.retainAll(Arrays.asList(ints));
371	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
322	<	assertFalse(q.containsAll(Arrays.asList(ints)));
369	>	assertFalse(q.retainAll(Arrays.asList(empty)));
370	>	Integer[] ints = new Integer[1]; ints[0] = zero;
371	>	assertFalse(q.retainAll(Arrays.asList(ints)));
372		}
373
374	<	public void testRemoveAll(){
375	<	SynchronousQueue q = new SynchronousQueue();
374	>	/**
375	>	* removeAll returns false
376	>	*/
377	>	public void testRemoveAll()      { testRemoveAll(false); }
378	>	public void testRemoveAll_fair() { testRemoveAll(true); }
379	>	public void testRemoveAll(boolean fair) {
380	>	final SynchronousQueue q = new SynchronousQueue(fair);
381		Integer[] empty = new Integer[0];
382	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
383	<	q.removeAll(Arrays.asList(ints));
330	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
382	>	assertFalse(q.removeAll(Arrays.asList(empty)));
383	>	Integer[] ints = new Integer[1]; ints[0] = zero;
384		assertFalse(q.containsAll(Arrays.asList(ints)));
385		}
386
387	<
388	<	public void testToArray(){
389	<	SynchronousQueue q = new SynchronousQueue();
390	<	Object[] o = q.toArray();
391	<	assertEquals(o.length, 0);
392	<	}
393	<
394	<	public void testToArray2(){
395	<	SynchronousQueue q = new SynchronousQueue();
396	<	Integer[] ints = new Integer[1];
397	<	assertNull(ints[0]);
398	<	}
399	<
400	<	public void testIterator(){
401	<	SynchronousQueue q = new SynchronousQueue();
402	<	Iterator it = q.iterator();
403	<	assertFalse(it.hasNext());
404	<	try {
405	<	Object x = it.next();
406	<	fail("should throw");
407	<	}
408	<	catch (NoSuchElementException success) {}
409	<	}
410	<
411	<	public void testIteratorRemove(){
412	<	SynchronousQueue q = new SynchronousQueue();
413	<	Iterator it = q.iterator();
387	>	/**
388	>	* toArray is empty
389	>	*/
390	>	public void testToArray()      { testToArray(false); }
391	>	public void testToArray_fair() { testToArray(true); }
392	>	public void testToArray(boolean fair) {
393	>	final SynchronousQueue q = new SynchronousQueue(fair);
394	>	Object[] o = q.toArray();
395	>	assertEquals(0, o.length);
396	>	}
397	>
398	>	/**
399	>	* toArray(Integer array) returns its argument with the first
400	>	* element (if present) nulled out
401	>	*/
402	>	public void testToArray2()      { testToArray2(false); }
403	>	public void testToArray2_fair() { testToArray2(true); }
404	>	public void testToArray2(boolean fair) {
405	>	final SynchronousQueue<Integer> q = new SynchronousQueue<>(fair);
406	>	Integer[] a;
407	>
408	>	a = new Integer[0];
409	>	assertSame(a, q.toArray(a));
410	>
411	>	a = new Integer[3];
412	>	Arrays.fill(a, 42);
413	>	assertSame(a, q.toArray(a));
414	>	assertNull(a[0]);
415	>	for (int i = 1; i < a.length; i++)
416	>	assertEquals(42, (int) a[i]);
417	>	}
418	>
419	>	/**
420	>	* toArray(null) throws NPE
421	>	*/
422	>	public void testToArray_null()      { testToArray_null(false); }
423	>	public void testToArray_null_fair() { testToArray_null(true); }
424	>	public void testToArray_null(boolean fair) {
425	>	final SynchronousQueue q = new SynchronousQueue(fair);
426	>	try {
427	>	Object[] o = q.toArray(null);
428	>	shouldThrow();
429	>	} catch (NullPointerException success) {}
430	>	}
431	>
432	>	/**
433	>	* iterator does not traverse any elements
434	>	*/
435	>	public void testIterator()      { testIterator(false); }
436	>	public void testIterator_fair() { testIterator(true); }
437	>	public void testIterator(boolean fair) {
438	>	assertIteratorExhausted(new SynchronousQueue(fair).iterator());
439	>	}
440	>
441	>	/**
442	>	* iterator remove throws ISE
443	>	*/
444	>	public void testIteratorRemove()      { testIteratorRemove(false); }
445	>	public void testIteratorRemove_fair() { testIteratorRemove(true); }
446	>	public void testIteratorRemove(boolean fair) {
447	>	final SynchronousQueue q = new SynchronousQueue(fair);
448	>	Iterator it = q.iterator();
449		try {
450		it.remove();
451	<	fail("should throw");
452	<	}
365	<	catch (IllegalStateException success) {}
451	>	shouldThrow();
452	>	} catch (IllegalStateException success) {}
453		}
454
455	<	public void testToString(){
456	<	SynchronousQueue q = new SynchronousQueue();
455	>	/**
456	>	* toString returns a non-null string
457	>	*/
458	>	public void testToString()      { testToString(false); }
459	>	public void testToString_fair() { testToString(true); }
460	>	public void testToString(boolean fair) {
461	>	final SynchronousQueue q = new SynchronousQueue(fair);
462		String s = q.toString();
463	<	assertTrue(s != null);
464	<	}
373	<
374	<
375	<	public void testOfferInExecutor() {
376	<	final SynchronousQueue q = new SynchronousQueue();
377	<	ExecutorService executor = Executors.newFixedThreadPool(2);
378	<	final Integer one = new Integer(1);
463	>	assertNotNull(s);
464	>	}
465
466	<	executor.execute(new Runnable() {
467	<	public void run() {
468	<	assertFalse(q.offer(one));
469	<	try {
470	<	assertTrue(q.offer(one, MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
466	>	/**
467	>	* offer transfers elements across Executor tasks
468	>	*/
469	>	public void testOfferInExecutor()      { testOfferInExecutor(false); }
470	>	public void testOfferInExecutor_fair() { testOfferInExecutor(true); }
471	>	public void testOfferInExecutor(boolean fair) {
472	>	final SynchronousQueue q = new SynchronousQueue(fair);
473	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
474	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
475	>	try (PoolCleaner cleaner = cleaner(executor)) {
476	>
477	>	executor.execute(new CheckedRunnable() {
478	>	public void realRun() throws InterruptedException {
479	>	assertFalse(q.offer(one));
480	>	threadsStarted.await();
481	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
482		assertEquals(0, q.remainingCapacity());
483	<	}
387	<	catch (InterruptedException e) {
388	<	fail("should not be interrupted");
389	<	}
390	<	}
391	<	});
392	<
393	<	executor.execute(new Runnable() {
394	<	public void run() {
395	<	try {
396	<	Thread.sleep(MEDIUM_DELAY_MS);
397	<	assertEquals(one, q.take());
398	<	}
399	<	catch (InterruptedException e) {
400	<	fail("should not be interrupted");
401	<	}
402	<	}
403	<	});
404	<
405	<	executor.shutdown();
483	>	}});
484
485	+	executor.execute(new CheckedRunnable() {
486	+	public void realRun() throws InterruptedException {
487	+	threadsStarted.await();
488	+	assertSame(one, q.take());
489	+	}});
490	+	}
491		}
492
493	<	public void testPollInExecutor() {
494	<
495	<	final SynchronousQueue q = new SynchronousQueue();
496	<
497	<	ExecutorService executor = Executors.newFixedThreadPool(2);
498	<
499	<	executor.execute(new Runnable() {
500	<	public void run() {
501	<	assertNull(q.poll());
502	<	try {
503	<	assertTrue(null != q.poll(MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
493	>	/**
494	>	* timed poll retrieves elements across Executor threads
495	>	*/
496	>	public void testPollInExecutor()      { testPollInExecutor(false); }
497	>	public void testPollInExecutor_fair() { testPollInExecutor(true); }
498	>	public void testPollInExecutor(boolean fair) {
499	>	final SynchronousQueue q = new SynchronousQueue(fair);
500	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
501	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
502	>	try (PoolCleaner cleaner = cleaner(executor)) {
503	>	executor.execute(new CheckedRunnable() {
504	>	public void realRun() throws InterruptedException {
505	>	assertNull(q.poll());
506	>	threadsStarted.await();
507	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
508		assertTrue(q.isEmpty());
509	<	}
422	<	catch (InterruptedException e) {
423	<	fail("should not be interrupted");
424	<	}
425	<	}
426	<	});
427	<
428	<	executor.execute(new Runnable() {
429	<	public void run() {
430	<	try {
431	<	Thread.sleep(MEDIUM_DELAY_MS);
432	<	q.put(new Integer(1));
433	<	}
434	<	catch (InterruptedException e) {
435	<	fail("should not be interrupted");
436	<	}
437	<	}
438	<	});
439	<
440	<	executor.shutdown();
509	>	}});
510
511	+	executor.execute(new CheckedRunnable() {
512	+	public void realRun() throws InterruptedException {
513	+	threadsStarted.await();
514	+	q.put(one);
515	+	}});
516	+	}
517		}
518
519	+	/**
520	+	* a deserialized serialized queue is usable
521	+	*/
522		public void testSerialization() {
523	<	SynchronousQueue q = new SynchronousQueue();
524	<	try {
525	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
526	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
527	<	out.writeObject(q);
528	<	out.close();
529	<
530	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
531	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
532	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
533	<	assertEquals(q.size(), r.size());
534	<	while (!q.isEmpty())
535	<	assertEquals(q.remove(), r.remove());
536	<	} catch(Exception e){
459	<	fail("unexpected exception");
523	>	final SynchronousQueue x = new SynchronousQueue();
524	>	final SynchronousQueue y = new SynchronousQueue(false);
525	>	final SynchronousQueue z = new SynchronousQueue(true);
526	>	assertSerialEquals(x, y);
527	>	assertNotSerialEquals(x, z);
528	>	SynchronousQueue[] qs = { x, y, z };
529	>	for (SynchronousQueue q : qs) {
530	>	SynchronousQueue clone = serialClone(q);
531	>	assertNotSame(q, clone);
532	>	assertSerialEquals(q, clone);
533	>	assertTrue(clone.isEmpty());
534	>	assertEquals(0, clone.size());
535	>	assertEquals(0, clone.remainingCapacity());
536	>	assertFalse(clone.offer(zero));
537		}
538		}
539
540	+	/**
541	+	* drainTo(c) of empty queue doesn't transfer elements
542	+	*/
543	+	public void testDrainTo()      { testDrainTo(false); }
544	+	public void testDrainTo_fair() { testDrainTo(true); }
545	+	public void testDrainTo(boolean fair) {
546	+	final SynchronousQueue q = new SynchronousQueue(fair);
547	+	ArrayList l = new ArrayList();
548	+	q.drainTo(l);
549	+	assertEquals(0, q.size());
550	+	assertEquals(0, l.size());
551	+	}
552	+
553	+	/**
554	+	* drainTo empties queue, unblocking a waiting put.
555	+	*/
556	+	public void testDrainToWithActivePut()      { testDrainToWithActivePut(false); }
557	+	public void testDrainToWithActivePut_fair() { testDrainToWithActivePut(true); }
558	+	public void testDrainToWithActivePut(boolean fair) {
559	+	final SynchronousQueue q = new SynchronousQueue(fair);
560	+	Thread t = newStartedThread(new CheckedRunnable() {
561	+	public void realRun() throws InterruptedException {
562	+	q.put(one);
563	+	}});
564	+
565	+	ArrayList l = new ArrayList();
566	+	long startTime = System.nanoTime();
567	+	while (l.isEmpty()) {
568	+	q.drainTo(l);
569	+	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
570	+	fail("timed out");
571	+	Thread.yield();
572	+	}
573	+	assertEquals(1, l.size());
574	+	assertSame(one, l.get(0));
575	+	awaitTermination(t);
576	+	}
577	+
578	+	/**
579	+	* drainTo(c, n) empties up to n elements of queue into c
580	+	*/
581	+	public void testDrainToN() throws InterruptedException {
582	+	final SynchronousQueue q = new SynchronousQueue();
583	+	Thread t1 = newStartedThread(new CheckedRunnable() {
584	+	public void realRun() throws InterruptedException {
585	+	q.put(one);
586	+	}});
587	+
588	+	Thread t2 = newStartedThread(new CheckedRunnable() {
589	+	public void realRun() throws InterruptedException {
590	+	q.put(two);
591	+	}});
592	+
593	+	ArrayList l = new ArrayList();
594	+	int drained;
595	+	while ((drained = q.drainTo(l, 1)) == 0) Thread.yield();
596	+	assertEquals(1, drained);
597	+	assertEquals(1, l.size());
598	+	while ((drained = q.drainTo(l, 1)) == 0) Thread.yield();
599	+	assertEquals(1, drained);
600	+	assertEquals(2, l.size());
601	+	assertTrue(l.contains(one));
602	+	assertTrue(l.contains(two));
603	+	awaitTermination(t1);
604	+	awaitTermination(t2);
605	+	}
606	+
607	+	/**
608	+	* remove(null), contains(null) always return false
609	+	*/
610	+	public void testNeverContainsNull() {
611	+	Collection<?> q = new SynchronousQueue();
612	+	assertFalse(q.contains(null));
613	+	assertFalse(q.remove(null));
614	+	}
615	+
616		}

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