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

Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:55 2003 UTC vs.
Revision 1.67 by jsr166, Mon Dec 16 22:55:54 2019 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	<
12	<	public class SynchronousQueueTest extends TestCase {
13	<
14	<	private final static int N = 1;
15	<	private static long SHORT_DELAY_MS = 100;
16	<	private static long MEDIUM_DELAY_MS = 1000;
17	<	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() {
24	<	return new TestSuite(SynchronousQueueTest.class);
25	<	}
22	>	import junit.framework.Test;
23
24	<	public void testEmptyFull() {
28	<	SynchronousQueue q = new SynchronousQueue();
29	<	assertTrue(q.isEmpty());
30	<	assertEquals(0, q.size());
31	<	assertEquals(0, q.remainingCapacity());
32	<	assertFalse(q.offer(new Integer(3)));
33	<	}
24	>	public class SynchronousQueueTest extends JSR166TestCase {
25
26	<	public void testOfferNull(){
27	<	try {
28	<	SynchronousQueue q = new SynchronousQueue();
29	<	q.offer(null);
39	<	fail("should throw NPE");
40	<	} catch (NullPointerException success) { }
26	>	public static class Fair extends BlockingQueueTest {
27	>	protected BlockingQueue emptyCollection() {
28	>	return new SynchronousQueue(true);
29	>	}
30		}
31
32	<	public void testOffer(){
33	<	SynchronousQueue q = new SynchronousQueue();
34	<	assertFalse(q.offer(new Integer(1)));
32	>	public static class NonFair extends BlockingQueueTest {
33	>	protected BlockingQueue emptyCollection() {
34	>	return new SynchronousQueue(false);
35	>	}
36		}
37
38	<	public void testAdd(){
39	<	try {
50	<	SynchronousQueue q = new SynchronousQueue();
51	<	assertEquals(0, q.remainingCapacity());
52	<	q.add(new Integer(0));
53	<	} catch (IllegalStateException success){
54	<	}
38	>	public static void main(String[] args) {
39	>	main(suite(), args);
40		}
41
42	<	public void testAddAll1(){
43	<	try {
44	<	SynchronousQueue q = new SynchronousQueue();
45	<	q.addAll(null);
61	<	fail("Cannot add null collection");
62	<	}
63	<	catch (NullPointerException success) {}
64	<	}
65	<	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) {}
42	>	public static Test suite() {
43	>	return newTestSuite(SynchronousQueueTest.class,
44	>	new Fair().testSuite(),
45	>	new NonFair().testSuite());
46		}
47
48	<	public void testPutNull() {
49	<	try {
50	<	SynchronousQueue q = new SynchronousQueue();
51	<	q.put(null);
52	<	fail("put should throw NPE");
53	<	}
54	<	catch (NullPointerException success){
55	<	}
56	<	catch (InterruptedException ie) {
57	<	fail("Unexpected exception");
58	<	}
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	<	}
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 testPutWithTake() {
62	<	final SynchronousQueue q = new SynchronousQueue();
63	<	Thread t = new Thread(new Runnable() {
64	<	public void run(){
65	<	int added = 0;
66	<	try {
67	<	q.put(new Object());
68	<	++added;
69	<	q.put(new Object());
70	<	++added;
71	<	q.put(new Object());
72	<	++added;
73	<	q.put(new Object());
74	<	++added;
75	<	fail("Should block");
76	<	} catch (InterruptedException e){
77	<	assertTrue(added >= 1);
78	<	}
138	<	}
139	<	});
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	<	t.start();
81	<	Thread.sleep(SHORT_DELAY_MS);
82	<	q.take();
83	<	Thread.sleep(SHORT_DELAY_MS);
84	<	t.interrupt();
85	<	t.join();
86	<	} catch (Exception e){
87	<	fail("Unexpected exception");
88	<	}
89	<	}
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 IllegalStateException 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 testTimedOffer() {
133	<	final SynchronousQueue q = new SynchronousQueue();
134	<	Thread t = new Thread(new Runnable() {
135	<	public void run(){
136	<	try {
137	<
138	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
139	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
140	<	fail("Should block");
141	<	} catch (InterruptedException success){}
142	<	}
143	<	});
144	<
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	<	}
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	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
142	>	t.interrupt();
143	>	awaitTermination(t);
144	>	assertEquals(0, q.remainingCapacity());
145		}
146
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 testTakeFromEmpty() {
162	<	final SynchronousQueue q = new SynchronousQueue();
163	<	Thread t = new Thread(new Runnable() {
164	<	public void run(){
165	<	try {
166	<	q.take();
182	<	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	<	}
161	>	Thread.currentThread().interrupt();
162	>	try {
163	>	q.put(99);
164	>	shouldThrow();
165	>	} catch (InterruptedException success) {}
166	>	assertFalse(Thread.interrupted());
167
168	<	public void testPoll(){
169	<	SynchronousQueue q = new SynchronousQueue();
170	<	assertNull(q.poll());
171	<	}
168	>	pleaseInterrupt.countDown();
169	>	try {
170	>	q.put(99);
171	>	shouldThrow();
172	>	} catch (InterruptedException success) {}
173	>	assertFalse(Thread.interrupted());
174	>	}});
175
176	<	public void testTimedPoll0() {
177	<	try {
178	<	SynchronousQueue q = new SynchronousQueue();
179	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
205	<	} catch (InterruptedException e){
206	<	fail("Unexpected exception");
207	<	}
208	<	}
176	>	await(pleaseTake);
177	>	assertEquals(0, q.remainingCapacity());
178	>	try { assertSame(one, q.take()); }
179	>	catch (InterruptedException e) { threadUnexpectedException(e); }
180
181	<	public void testTimedPoll() {
182	<	try {
183	<	SynchronousQueue q = new SynchronousQueue();
184	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
185	<	} catch (InterruptedException e){
215	<	fail("Unexpected exception");
216	<	}
181	>	await(pleaseInterrupt);
182	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
183	>	t.interrupt();
184	>	awaitTermination(t);
185	>	assertEquals(0, q.remainingCapacity());
186		}
187
188	<	public void testInterruptedTimedPoll(){
189	<	Thread t = new Thread(new Runnable() {
190	<	public void run() {
191	<	try {
192	<	SynchronousQueue q = new SynchronousQueue();
193	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
194	<	} catch (InterruptedException success){
195	<	}
196	<	}});
197	<	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	<	}
237	<	}
188	>	/**
189	>	* timed offer times out if elements not taken
190	>	*/
191	>	public void testTimedOffer() {
192	>	final boolean fair = randomBoolean();
193	>	final SynchronousQueue q = new SynchronousQueue(fair);
194	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
195	>	Thread t = newStartedThread(new CheckedRunnable() {
196	>	public void realRun() throws InterruptedException {
197	>	long startTime = System.nanoTime();
198
199	<	public void testTimedPollWithOffer(){
200	<	final SynchronousQueue q = new SynchronousQueue();
241	<	Thread t = new Thread(new Runnable() {
242	<	public void run(){
243	<	try {
244	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
245	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
246	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
247	<	fail("Should block");
248	<	} catch (InterruptedException success) { }
249	<	}
250	<	});
251	<	try {
252	<	t.start();
253	<	Thread.sleep(SHORT_DELAY_MS * 2);
254	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
255	<	t.interrupt();
256	<	t.join();
257	<	} catch (Exception e){
258	<	fail("Unexpected exception");
259	<	}
260	<	}
199	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
200	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
201
202	+	Thread.currentThread().interrupt();
203	+	try {
204	+	q.offer(new Object(), randomTimeout(), randomTimeUnit());
205	+	shouldThrow();
206	+	} catch (InterruptedException success) {}
207	+	assertFalse(Thread.interrupted());
208
209	<	public void testPeek(){
210	<	SynchronousQueue q = new SynchronousQueue();
211	<	assertNull(q.peek());
212	<	}
209	>	pleaseInterrupt.countDown();
210	>	try {
211	>	q.offer(new Object(), LONGER_DELAY_MS, MILLISECONDS);
212	>	shouldThrow();
213	>	} catch (InterruptedException success) {}
214	>	assertFalse(Thread.interrupted());
215	>	}});
216	>
217	>	await(pleaseInterrupt);
218	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
219	>	t.interrupt();
220	>	awaitTermination(t);
221	>	}
222	>
223	>	/**
224	>	* poll return null if no active putter
225	>	*/
226	>	public void testPoll()      { testPoll(false); }
227	>	public void testPoll_fair() { testPoll(true); }
228	>	public void testPoll(boolean fair) {
229	>	final SynchronousQueue q = new SynchronousQueue(fair);
230	>	assertNull(q.poll());
231	>	}
232	>
233	>	/**
234	>	* timed poll with zero timeout times out if no active putter
235	>	*/
236	>	public void testTimedPoll0()      { testTimedPoll0(false); }
237	>	public void testTimedPoll0_fair() { testTimedPoll0(true); }
238	>	public void testTimedPoll0(boolean fair) {
239	>	final SynchronousQueue q = new SynchronousQueue(fair);
240	>	try { assertNull(q.poll(0, MILLISECONDS)); }
241	>	catch (InterruptedException e) { threadUnexpectedException(e); }
242	>	}
243	>
244	>	/**
245	>	* timed poll with nonzero timeout times out if no active putter
246	>	*/
247	>	public void testTimedPoll() {
248	>	final boolean fair = randomBoolean();
249	>	final SynchronousQueue q = new SynchronousQueue(fair);
250	>	final long startTime = System.nanoTime();
251	>	try { assertNull(q.poll(timeoutMillis(), MILLISECONDS)); }
252	>	catch (InterruptedException e) { threadUnexpectedException(e); }
253	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
254	>	}
255	>
256	>	/**
257	>	* timed poll before a delayed offer times out, returning null;
258	>	* after offer succeeds; on interruption throws
259	>	*/
260	>	public void testTimedPollWithOffer() {
261	>	final boolean fair = randomBoolean();
262	>	final SynchronousQueue q = new SynchronousQueue(fair);
263	>	final CountDownLatch pleaseOffer = new CountDownLatch(1);
264	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
265	>	Thread t = newStartedThread(new CheckedRunnable() {
266	>	public void realRun() throws InterruptedException {
267	>	long startTime = System.nanoTime();
268	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
269	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
270	>
271	>	pleaseOffer.countDown();
272	>	startTime = System.nanoTime();
273	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
274	>
275	>	Thread.currentThread().interrupt();
276	>	try {
277	>	q.poll(randomTimeout(), randomTimeUnit());
278	>	shouldThrow();
279	>	} catch (InterruptedException success) {}
280	>	assertFalse(Thread.interrupted());
281
282	<	public void testElement(){
283	<	SynchronousQueue q = new SynchronousQueue();
282	>	pleaseInterrupt.countDown();
283	>	try {
284	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
285	>	shouldThrow();
286	>	} catch (InterruptedException success) {}
287	>	assertFalse(Thread.interrupted());
288	>
289	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
290	>	}});
291	>
292	>	await(pleaseOffer);
293	>	long startTime = System.nanoTime();
294	>	try { assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS)); }
295	>	catch (InterruptedException e) { threadUnexpectedException(e); }
296	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
297	>
298	>	await(pleaseInterrupt);
299	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
300	>	t.interrupt();
301	>	awaitTermination(t);
302	>	}
303	>
304	>	/**
305	>	* peek() returns null if no active putter
306	>	*/
307	>	public void testPeek()      { testPeek(false); }
308	>	public void testPeek_fair() { testPeek(true); }
309	>	public void testPeek(boolean fair) {
310	>	final SynchronousQueue q = new SynchronousQueue(fair);
311	>	assertNull(q.peek());
312	>	}
313	>
314	>	/**
315	>	* element() throws NoSuchElementException if no active putter
316	>	*/
317	>	public void testElement()      { testElement(false); }
318	>	public void testElement_fair() { testElement(true); }
319	>	public void testElement(boolean fair) {
320	>	final SynchronousQueue q = new SynchronousQueue(fair);
321		try {
322		q.element();
323	<	fail("no such element");
324	<	}
274	<	catch (NoSuchElementException success) {}
323	>	shouldThrow();
324	>	} catch (NoSuchElementException success) {}
325		}
326
327	<	public void testRemove(){
328	<	SynchronousQueue q = new SynchronousQueue();
327	>	/**
328	>	* remove() throws NoSuchElementException if no active putter
329	>	*/
330	>	public void testRemove()      { testRemove(false); }
331	>	public void testRemove_fair() { testRemove(true); }
332	>	public void testRemove(boolean fair) {
333	>	final SynchronousQueue q = new SynchronousQueue(fair);
334		try {
335		q.remove();
336	<	fail("remove should throw");
337	<	} catch (NoSuchElementException success){
283	<	}
284	<	}
285	<
286	<	public void testRemoveElement(){
287	<	SynchronousQueue q = new SynchronousQueue();
288	<	for (int i = 1; i < N; i+=2) {
289	<	assertFalse(q.remove(new Integer(i)));
290	<	}
291	<	assert(q.isEmpty());
292	<	}
293	<
294	<	public void testContains(){
295	<	SynchronousQueue q = new SynchronousQueue();
296	<	for (int i = 0; i < N; ++i) {
297	<	assertFalse(q.contains(new Integer(i)));
298	<	}
336	>	shouldThrow();
337	>	} catch (NoSuchElementException success) {}
338		}
339
340	<	public void testClear(){
341	<	SynchronousQueue q = new SynchronousQueue();
340	>	/**
341	>	* contains returns false
342	>	*/
343	>	public void testContains()      { testContains(false); }
344	>	public void testContains_fair() { testContains(true); }
345	>	public void testContains(boolean fair) {
346	>	final SynchronousQueue q = new SynchronousQueue(fair);
347	>	assertFalse(q.contains(zero));
348	>	}
349	>
350	>	/**
351	>	* clear ensures isEmpty
352	>	*/
353	>	public void testClear()      { testClear(false); }
354	>	public void testClear_fair() { testClear(true); }
355	>	public void testClear(boolean fair) {
356	>	final SynchronousQueue q = new SynchronousQueue(fair);
357		q.clear();
358		assertTrue(q.isEmpty());
359		}
360
361	<	public void testContainsAll(){
362	<	SynchronousQueue q = new SynchronousQueue();
361	>	/**
362	>	* containsAll returns false unless empty
363	>	*/
364	>	public void testContainsAll()      { testContainsAll(false); }
365	>	public void testContainsAll_fair() { testContainsAll(true); }
366	>	public void testContainsAll(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	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
369	>	assertTrue(q.containsAll(Arrays.asList(empty)));
370	>	Integer[] ints = new Integer[1]; ints[0] = zero;
371		assertFalse(q.containsAll(Arrays.asList(ints)));
372		}
373
374	<	public void testRetainAll(){
375	<	SynchronousQueue q = new SynchronousQueue();
374	>	/**
375	>	* retainAll returns false
376	>	*/
377	>	public void testRetainAll()      { testRetainAll(false); }
378	>	public void testRetainAll_fair() { testRetainAll(true); }
379	>	public void testRetainAll(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.retainAll(Arrays.asList(ints));
384	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
321	<	assertFalse(q.containsAll(Arrays.asList(ints)));
382	>	assertFalse(q.retainAll(Arrays.asList(empty)));
383	>	Integer[] ints = new Integer[1]; ints[0] = zero;
384	>	assertFalse(q.retainAll(Arrays.asList(ints)));
385		}
386
387	<	public void testRemoveAll(){
388	<	SynchronousQueue q = new SynchronousQueue();
387	>	/**
388	>	* removeAll returns false
389	>	*/
390	>	public void testRemoveAll()      { testRemoveAll(false); }
391	>	public void testRemoveAll_fair() { testRemoveAll(true); }
392	>	public void testRemoveAll(boolean fair) {
393	>	final SynchronousQueue q = new SynchronousQueue(fair);
394		Integer[] empty = new Integer[0];
395	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
396	<	q.removeAll(Arrays.asList(ints));
329	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
395	>	assertFalse(q.removeAll(Arrays.asList(empty)));
396	>	Integer[] ints = new Integer[1]; ints[0] = zero;
397		assertFalse(q.containsAll(Arrays.asList(ints)));
398		}
399
400	<
401	<	public void testToArray(){
402	<	SynchronousQueue q = new SynchronousQueue();
403	<	Object[] o = q.toArray();
404	<	assertEquals(o.length, 0);
405	<	}
406	<
407	<	public void testToArray2(){
408	<	SynchronousQueue q = new SynchronousQueue();
409	<	Integer[] ints = new Integer[1];
410	<	assertNull(ints[0]);
411	<	}
412	<
413	<	public void testIterator(){
414	<	SynchronousQueue q = new SynchronousQueue();
415	<	Iterator it = q.iterator();
416	<	assertFalse(it.hasNext());
417	<	try {
418	<	Object x = it.next();
419	<	fail("should throw");
420	<	}
421	<	catch (NoSuchElementException success) {}
422	<	}
423	<
424	<	public void testIteratorRemove(){
425	<	SynchronousQueue q = new SynchronousQueue();
426	<	Iterator it = q.iterator();
400	>	/**
401	>	* toArray is empty
402	>	*/
403	>	public void testToArray()      { testToArray(false); }
404	>	public void testToArray_fair() { testToArray(true); }
405	>	public void testToArray(boolean fair) {
406	>	final SynchronousQueue q = new SynchronousQueue(fair);
407	>	Object[] o = q.toArray();
408	>	assertEquals(0, o.length);
409	>	}
410	>
411	>	/**
412	>	* toArray(Integer array) returns its argument with the first
413	>	* element (if present) nulled out
414	>	*/
415	>	public void testToArray2()      { testToArray2(false); }
416	>	public void testToArray2_fair() { testToArray2(true); }
417	>	public void testToArray2(boolean fair) {
418	>	final SynchronousQueue<Integer> q = new SynchronousQueue<>(fair);
419	>	Integer[] a;
420	>
421	>	a = new Integer[0];
422	>	assertSame(a, q.toArray(a));
423	>
424	>	a = new Integer[3];
425	>	Arrays.fill(a, 42);
426	>	assertSame(a, q.toArray(a));
427	>	assertNull(a[0]);
428	>	for (int i = 1; i < a.length; i++)
429	>	assertEquals(42, (int) a[i]);
430	>	}
431	>
432	>	/**
433	>	* toArray(null) throws NPE
434	>	*/
435	>	public void testToArray_null()      { testToArray_null(false); }
436	>	public void testToArray_null_fair() { testToArray_null(true); }
437	>	public void testToArray_null(boolean fair) {
438	>	final SynchronousQueue q = new SynchronousQueue(fair);
439	>	try {
440	>	Object[] unused = q.toArray((Object[])null);
441	>	shouldThrow();
442	>	} catch (NullPointerException success) {}
443	>	}
444	>
445	>	/**
446	>	* iterator does not traverse any elements
447	>	*/
448	>	public void testIterator()      { testIterator(false); }
449	>	public void testIterator_fair() { testIterator(true); }
450	>	public void testIterator(boolean fair) {
451	>	assertIteratorExhausted(new SynchronousQueue(fair).iterator());
452	>	}
453	>
454	>	/**
455	>	* iterator remove throws IllegalStateException
456	>	*/
457	>	public void testIteratorRemove()      { testIteratorRemove(false); }
458	>	public void testIteratorRemove_fair() { testIteratorRemove(true); }
459	>	public void testIteratorRemove(boolean fair) {
460	>	final SynchronousQueue q = new SynchronousQueue(fair);
461	>	Iterator it = q.iterator();
462		try {
463		it.remove();
464	<	fail("should throw");
465	<	}
364	<	catch (IllegalStateException success) {}
464	>	shouldThrow();
465	>	} catch (IllegalStateException success) {}
466		}
467
468	<	public void testToString(){
469	<	SynchronousQueue q = new SynchronousQueue();
468	>	/**
469	>	* toString returns a non-null string
470	>	*/
471	>	public void testToString()      { testToString(false); }
472	>	public void testToString_fair() { testToString(true); }
473	>	public void testToString(boolean fair) {
474	>	final SynchronousQueue q = new SynchronousQueue(fair);
475		String s = q.toString();
476	<	assertTrue(s != null);
477	<	}
372	<
373	<
374	<	public void testOfferInExecutor() {
375	<	final SynchronousQueue q = new SynchronousQueue();
376	<	ExecutorService executor = Executors.newFixedThreadPool(2);
377	<	final Integer one = new Integer(1);
476	>	assertNotNull(s);
477	>	}
478
479	<	executor.execute(new Runnable() {
480	<	public void run() {
481	<	assertFalse(q.offer(one));
482	<	try {
483	<	assertTrue(q.offer(one, MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
479	>	/**
480	>	* offer transfers elements across Executor tasks
481	>	*/
482	>	public void testOfferInExecutor()      { testOfferInExecutor(false); }
483	>	public void testOfferInExecutor_fair() { testOfferInExecutor(true); }
484	>	public void testOfferInExecutor(boolean fair) {
485	>	final SynchronousQueue q = new SynchronousQueue(fair);
486	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
487	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
488	>	try (PoolCleaner cleaner = cleaner(executor)) {
489	>
490	>	executor.execute(new CheckedRunnable() {
491	>	public void realRun() throws InterruptedException {
492	>	assertFalse(q.offer(one));
493	>	threadsStarted.await();
494	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
495		assertEquals(0, q.remainingCapacity());
496	<	}
386	<	catch (InterruptedException e) {
387	<	fail("should not be interrupted");
388	<	}
389	<	}
390	<	});
391	<
392	<	executor.execute(new Runnable() {
393	<	public void run() {
394	<	try {
395	<	Thread.sleep(MEDIUM_DELAY_MS);
396	<	assertEquals(one, q.take());
397	<	}
398	<	catch (InterruptedException e) {
399	<	fail("should not be interrupted");
400	<	}
401	<	}
402	<	});
403	<
404	<	executor.shutdown();
496	>	}});
497
498	+	executor.execute(new CheckedRunnable() {
499	+	public void realRun() throws InterruptedException {
500	+	threadsStarted.await();
501	+	assertSame(one, q.take());
502	+	}});
503	+	}
504		}
505
506	<	public void testPollInExecutor() {
507	<
508	<	final SynchronousQueue q = new SynchronousQueue();
509	<
510	<	ExecutorService executor = Executors.newFixedThreadPool(2);
511	<
512	<	executor.execute(new Runnable() {
513	<	public void run() {
514	<	assertNull(q.poll());
515	<	try {
516	<	assertTrue(null != q.poll(MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
506	>	/**
507	>	* timed poll retrieves elements across Executor threads
508	>	*/
509	>	public void testPollInExecutor()      { testPollInExecutor(false); }
510	>	public void testPollInExecutor_fair() { testPollInExecutor(true); }
511	>	public void testPollInExecutor(boolean fair) {
512	>	final SynchronousQueue q = new SynchronousQueue(fair);
513	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
514	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
515	>	try (PoolCleaner cleaner = cleaner(executor)) {
516	>	executor.execute(new CheckedRunnable() {
517	>	public void realRun() throws InterruptedException {
518	>	assertNull(q.poll());
519	>	threadsStarted.await();
520	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
521		assertTrue(q.isEmpty());
522	<	}
421	<	catch (InterruptedException e) {
422	<	fail("should not be interrupted");
423	<	}
424	<	}
425	<	});
522	>	}});
523
524	<	executor.execute(new Runnable() {
525	<	public void run() {
526	<	try {
527	<	Thread.sleep(MEDIUM_DELAY_MS);
528	<	q.put(new Integer(1));
529	<	}
530	<	catch (InterruptedException e) {
531	<	fail("should not be interrupted");
532	<	}
533	<	}
534	<	});
535	<
536	<	executor.shutdown();
524	>	executor.execute(new CheckedRunnable() {
525	>	public void realRun() throws InterruptedException {
526	>	threadsStarted.await();
527	>	q.put(one);
528	>	}});
529	>	}
530	>	}
531	>
532	>	/**
533	>	* a deserialized/reserialized queue is usable
534	>	*/
535	>	public void testSerialization() {
536	>	final SynchronousQueue x = new SynchronousQueue();
537	>	final SynchronousQueue y = new SynchronousQueue(false);
538	>	final SynchronousQueue z = new SynchronousQueue(true);
539	>	assertSerialEquals(x, y);
540	>	assertNotSerialEquals(x, z);
541	>	SynchronousQueue[] qs = { x, y, z };
542	>	for (SynchronousQueue q : qs) {
543	>	SynchronousQueue clone = serialClone(q);
544	>	assertNotSame(q, clone);
545	>	assertSerialEquals(q, clone);
546	>	assertTrue(clone.isEmpty());
547	>	assertEquals(0, clone.size());
548	>	assertEquals(0, clone.remainingCapacity());
549	>	assertFalse(clone.offer(zero));
550	>	}
551	>	}
552
553	+	/**
554	+	* drainTo(c) of empty queue doesn't transfer elements
555	+	*/
556	+	public void testDrainTo()      { testDrainTo(false); }
557	+	public void testDrainTo_fair() { testDrainTo(true); }
558	+	public void testDrainTo(boolean fair) {
559	+	final SynchronousQueue q = new SynchronousQueue(fair);
560	+	ArrayList l = new ArrayList();
561	+	q.drainTo(l);
562	+	assertEquals(0, q.size());
563	+	assertEquals(0, l.size());
564	+	}
565	+
566	+	/**
567	+	* drainTo empties queue, unblocking a waiting put.
568	+	*/
569	+	public void testDrainToWithActivePut()      { testDrainToWithActivePut(false); }
570	+	public void testDrainToWithActivePut_fair() { testDrainToWithActivePut(true); }
571	+	public void testDrainToWithActivePut(boolean fair) {
572	+	final SynchronousQueue q = new SynchronousQueue(fair);
573	+	Thread t = newStartedThread(new CheckedRunnable() {
574	+	public void realRun() throws InterruptedException {
575	+	q.put(one);
576	+	}});
577	+
578	+	ArrayList l = new ArrayList();
579	+	long startTime = System.nanoTime();
580	+	while (l.isEmpty()) {
581	+	q.drainTo(l);
582	+	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
583	+	fail("timed out");
584	+	Thread.yield();
585	+	}
586	+	assertEquals(1, l.size());
587	+	assertSame(one, l.get(0));
588	+	awaitTermination(t);
589	+	}
590	+
591	+	/**
592	+	* drainTo(c, n) empties up to n elements of queue into c
593	+	*/
594	+	public void testDrainToN() throws InterruptedException {
595	+	final SynchronousQueue q = new SynchronousQueue();
596	+	Thread t1 = newStartedThread(new CheckedRunnable() {
597	+	public void realRun() throws InterruptedException {
598	+	q.put(one);
599	+	}});
600	+
601	+	Thread t2 = newStartedThread(new CheckedRunnable() {
602	+	public void realRun() throws InterruptedException {
603	+	q.put(two);
604	+	}});
605	+
606	+	ArrayList l = new ArrayList();
607	+	int drained;
608	+	while ((drained = q.drainTo(l, 1)) == 0) Thread.yield();
609	+	assertEquals(1, drained);
610	+	assertEquals(1, l.size());
611	+	while ((drained = q.drainTo(l, 1)) == 0) Thread.yield();
612	+	assertEquals(1, drained);
613	+	assertEquals(2, l.size());
614	+	assertTrue(l.contains(one));
615	+	assertTrue(l.contains(two));
616	+	awaitTermination(t1);
617	+	awaitTermination(t2);
618	+	}
619	+
620	+	/**
621	+	* remove(null), contains(null) always return false
622	+	*/
623	+	public void testNeverContainsNull() {
624	+	Collection<?> q = new SynchronousQueue();
625	+	assertFalse(q.contains(null));
626	+	assertFalse(q.remove(null));
627		}
628
629		}

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