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Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.61 by jsr166, Fri Aug 4 03:30:21 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.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10
11	<	public class SynchronousQueueTest extends JSR166TestCase {
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	>	import java.util.concurrent.ThreadLocalRandom;
22
23	<	public static void main(String[] args) {
16	<	junit.textui.TestRunner.run (suite());
17	<	}
23	>	import junit.framework.Test;
24
25	<	public static Test suite() {
20	<	return new TestSuite(SynchronousQueueTest.class);
21	<	}
22	<
23	<	public void testEmptyFull() {
24	<	SynchronousQueue q = new SynchronousQueue();
25	<	assertTrue(q.isEmpty());
26	<	assertEquals(0, q.size());
27	<	assertEquals(0, q.remainingCapacity());
28	<	assertFalse(q.offer(new Integer(3)));
29	<	}
25	>	public class SynchronousQueueTest extends JSR166TestCase {
26
27	<	public void testOfferNull(){
28	<	try {
29	<	SynchronousQueue q = new SynchronousQueue();
30	<	q.offer(null);
35	<	fail("should throw NPE");
36	<	} catch (NullPointerException success) { }
27	>	public static class Fair extends BlockingQueueTest {
28	>	protected BlockingQueue emptyCollection() {
29	>	return new SynchronousQueue(true);
30	>	}
31		}
32
33	<	public void testOffer(){
34	<	SynchronousQueue q = new SynchronousQueue();
35	<	assertFalse(q.offer(new Integer(1)));
33	>	public static class NonFair extends BlockingQueueTest {
34	>	protected BlockingQueue emptyCollection() {
35	>	return new SynchronousQueue(false);
36	>	}
37		}
38
39	<	public void testAdd(){
40	<	try {
46	<	SynchronousQueue q = new SynchronousQueue();
47	<	assertEquals(0, q.remainingCapacity());
48	<	q.add(new Integer(0));
49	<	} catch (IllegalStateException success){
50	<	}
39	>	public static void main(String[] args) {
40	>	main(suite(), args);
41		}
42
43	<	public void testAddAll1(){
44	<	try {
45	<	SynchronousQueue q = new SynchronousQueue();
46	<	q.addAll(null);
57	<	fail("Cannot add null collection");
58	<	}
59	<	catch (NullPointerException success) {}
60	<	}
61	<	public void testAddAll2(){
62	<	try {
63	<	SynchronousQueue q = new SynchronousQueue();
64	<	Integer[] ints = new Integer[1];
65	<	q.addAll(Arrays.asList(ints));
66	<	fail("Cannot add null elements");
67	<	}
68	<	catch (NullPointerException success) {}
69	<	}
70	<	public void testAddAll4(){
71	<	try {
72	<	SynchronousQueue q = new SynchronousQueue();
73	<	Integer[] ints = new Integer[1];
74	<	for (int i = 0; i < 1; ++i)
75	<	ints[i] = new Integer(i);
76	<	q.addAll(Arrays.asList(ints));
77	<	fail("Cannot add with insufficient capacity");
78	<	}
79	<	catch (IllegalStateException success) {}
43	>	public static Test suite() {
44	>	return newTestSuite(SynchronousQueueTest.class,
45	>	new Fair().testSuite(),
46	>	new NonFair().testSuite());
47		}
48
49	<	public void testPutNull() {
50	<	try {
51	<	SynchronousQueue q = new SynchronousQueue();
52	<	q.put(null);
53	<	fail("put should throw NPE");
54	<	}
55	<	catch (NullPointerException success){
56	<	}
57	<	catch (InterruptedException ie) {
58	<	fail("Unexpected exception");
59	<	}
93	<	}
94	<
95	<	public void testBlockingPut(){
96	<	Thread t = new Thread(new Runnable() {
97	<	public void run() {
98	<	try {
99	<	SynchronousQueue q = new SynchronousQueue();
100	<	q.put(new Integer(0));
101	<	threadFail("put should block");
102	<	} catch (InterruptedException ie){
103	<	}
104	<	}});
105	<	t.start();
106	<	try {
107	<	Thread.sleep(SHORT_DELAY_MS);
108	<	t.interrupt();
109	<	t.join();
110	<	}
111	<	catch (InterruptedException ie) {
112	<	fail("Unexpected exception");
113	<	}
49	>	/**
50	>	* Any SynchronousQueue is both empty and full
51	>	*/
52	>	public void testEmptyFull()      { testEmptyFull(false); }
53	>	public void testEmptyFull_fair() { testEmptyFull(true); }
54	>	public void testEmptyFull(boolean fair) {
55	>	final SynchronousQueue q = new SynchronousQueue(fair);
56	>	assertTrue(q.isEmpty());
57	>	assertEquals(0, q.size());
58	>	assertEquals(0, q.remainingCapacity());
59	>	assertFalse(q.offer(zero));
60		}
61
62	<	public void testPutWithTake() {
63	<	final SynchronousQueue q = new SynchronousQueue();
64	<	Thread t = new Thread(new Runnable() {
65	<	public void run(){
66	<	int added = 0;
67	<	try {
68	<	q.put(new Object());
69	<	++added;
70	<	q.put(new Object());
71	<	++added;
72	<	q.put(new Object());
73	<	++added;
74	<	q.put(new Object());
75	<	++added;
76	<	threadFail("Should block");
77	<	} catch (InterruptedException e){
78	<	assertTrue(added >= 1);
79	<	}
134	<	}
135	<	});
62	>	/**
63	>	* offer fails if no active taker
64	>	*/
65	>	public void testOffer()      { testOffer(false); }
66	>	public void testOffer_fair() { testOffer(true); }
67	>	public void testOffer(boolean fair) {
68	>	SynchronousQueue q = new SynchronousQueue(fair);
69	>	assertFalse(q.offer(one));
70	>	}
71	>
72	>	/**
73	>	* add throws IllegalStateException if no active taker
74	>	*/
75	>	public void testAdd()      { testAdd(false); }
76	>	public void testAdd_fair() { testAdd(true); }
77	>	public void testAdd(boolean fair) {
78	>	SynchronousQueue q = new SynchronousQueue(fair);
79	>	assertEquals(0, q.remainingCapacity());
80		try {
81	<	t.start();
82	<	Thread.sleep(SHORT_DELAY_MS);
83	<	q.take();
84	<	Thread.sleep(SHORT_DELAY_MS);
85	<	t.interrupt();
86	<	t.join();
87	<	} catch (Exception e){
88	<	fail("Unexpected exception");
89	<	}
90	<	}
81	>	q.add(one);
82	>	shouldThrow();
83	>	} catch (IllegalStateException success) {}
84	>	}
85	>
86	>	/**
87	>	* addAll(this) throws IllegalArgumentException
88	>	*/
89	>	public void testAddAll_self()      { testAddAll_self(false); }
90	>	public void testAddAll_self_fair() { testAddAll_self(true); }
91	>	public void testAddAll_self(boolean fair) {
92	>	SynchronousQueue q = new SynchronousQueue(fair);
93	>	try {
94	>	q.addAll(q);
95	>	shouldThrow();
96	>	} catch (IllegalArgumentException success) {}
97	>	}
98	>
99	>	/**
100	>	* addAll throws IllegalStateException if no active taker
101	>	*/
102	>	public void testAddAll_ISE()      { testAddAll_ISE(false); }
103	>	public void testAddAll_ISE_fair() { testAddAll_ISE(true); }
104	>	public void testAddAll_ISE(boolean fair) {
105	>	SynchronousQueue q = new SynchronousQueue(fair);
106	>	Integer[] ints = new Integer[1];
107	>	for (int i = 0; i < ints.length; i++)
108	>	ints[i] = i;
109	>	Collection<Integer> coll = Arrays.asList(ints);
110	>	try {
111	>	q.addAll(coll);
112	>	shouldThrow();
113	>	} catch (IllegalStateException success) {}
114	>	}
115	>
116	>	/**
117	>	* put blocks interruptibly if no active taker
118	>	*/
119	>	public void testBlockingPut()      { testBlockingPut(false); }
120	>	public void testBlockingPut_fair() { testBlockingPut(true); }
121	>	public void testBlockingPut(boolean fair) {
122	>	final SynchronousQueue q = new SynchronousQueue(fair);
123	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
124	>	Thread t = newStartedThread(new CheckedRunnable() {
125	>	public void realRun() throws InterruptedException {
126	>	Thread.currentThread().interrupt();
127	>	try {
128	>	q.put(99);
129	>	shouldThrow();
130	>	} catch (InterruptedException success) {}
131	>	assertFalse(Thread.interrupted());
132
133	<	public void testTimedOffer() {
134	<	final SynchronousQueue q = new SynchronousQueue();
135	<	Thread t = new Thread(new Runnable() {
136	<	public void run(){
137	<	try {
138	<
139	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
140	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
141	<	threadFail("Should block");
142	<	} catch (InterruptedException success){}
143	<	}
144	<	});
145	<
161	<	try {
162	<	t.start();
163	<	Thread.sleep(SMALL_DELAY_MS);
164	<	t.interrupt();
165	<	t.join();
166	<	} catch (Exception e){
167	<	fail("Unexpected exception");
168	<	}
133	>	pleaseInterrupt.countDown();
134	>	try {
135	>	q.put(99);
136	>	shouldThrow();
137	>	} catch (InterruptedException success) {}
138	>	assertFalse(Thread.interrupted());
139	>	}});
140	>
141	>	await(pleaseInterrupt);
142	>	assertThreadBlocks(t, Thread.State.WAITING);
143	>	t.interrupt();
144	>	awaitTermination(t);
145	>	assertEquals(0, q.remainingCapacity());
146		}
147
148	+	/**
149	+	* put blocks interruptibly waiting for take
150	+	*/
151	+	public void testPutWithTake()      { testPutWithTake(false); }
152	+	public void testPutWithTake_fair() { testPutWithTake(true); }
153	+	public void testPutWithTake(boolean fair) {
154	+	final SynchronousQueue q = new SynchronousQueue(fair);
155	+	final CountDownLatch pleaseTake = new CountDownLatch(1);
156	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
157	+	Thread t = newStartedThread(new CheckedRunnable() {
158	+	public void realRun() throws InterruptedException {
159	+	pleaseTake.countDown();
160	+	q.put(one);
161
162	<	public void testTakeFromEmpty() {
163	<	final SynchronousQueue q = new SynchronousQueue();
164	<	Thread t = new Thread(new Runnable() {
165	<	public void run(){
166	<	try {
167	<	q.take();
178	<	threadFail("Should block");
179	<	} catch (InterruptedException success){ }
180	<	}
181	<	});
182	<	try {
183	<	t.start();
184	<	Thread.sleep(SHORT_DELAY_MS);
185	<	t.interrupt();
186	<	t.join();
187	<	} catch (Exception e){
188	<	fail("Unexpected exception");
189	<	}
190	<	}
162	>	Thread.currentThread().interrupt();
163	>	try {
164	>	q.put(99);
165	>	shouldThrow();
166	>	} catch (InterruptedException success) {}
167	>	assertFalse(Thread.interrupted());
168
169	<	public void testPoll(){
170	<	SynchronousQueue q = new SynchronousQueue();
171	<	assertNull(q.poll());
172	<	}
169	>	pleaseInterrupt.countDown();
170	>	try {
171	>	q.put(99);
172	>	shouldThrow();
173	>	} catch (InterruptedException success) {}
174	>	assertFalse(Thread.interrupted());
175	>	}});
176
177	<	public void testTimedPoll0() {
178	<	try {
179	<	SynchronousQueue q = new SynchronousQueue();
180	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
201	<	} catch (InterruptedException e){
202	<	fail("Unexpected exception");
203	<	}
204	<	}
177	>	await(pleaseTake);
178	>	assertEquals(0, q.remainingCapacity());
179	>	try { assertSame(one, q.take()); }
180	>	catch (InterruptedException e) { threadUnexpectedException(e); }
181
182	<	public void testTimedPoll() {
183	<	try {
184	<	SynchronousQueue q = new SynchronousQueue();
185	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
186	<	} catch (InterruptedException e){
211	<	fail("Unexpected exception");
212	<	}
182	>	await(pleaseInterrupt);
183	>	assertThreadBlocks(t, Thread.State.WAITING);
184	>	t.interrupt();
185	>	awaitTermination(t);
186	>	assertEquals(0, q.remainingCapacity());
187		}
188
189	<	public void testInterruptedTimedPoll(){
190	<	Thread t = new Thread(new Runnable() {
191	<	public void run() {
192	<	try {
193	<	SynchronousQueue q = new SynchronousQueue();
194	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
195	<	} catch (InterruptedException success){
196	<	}
197	<	}});
198	<	t.start();
199	<	try {
200	<	Thread.sleep(SHORT_DELAY_MS);
227	<	t.interrupt();
228	<	t.join();
229	<	}
230	<	catch (InterruptedException ie) {
231	<	fail("Unexpected exception");
232	<	}
233	<	}
189	>	/**
190	>	* timed offer times out if elements not taken
191	>	*/
192	>	public void testTimedOffer() {
193	>	final boolean fair = ThreadLocalRandom.current().nextBoolean();
194	>	final SynchronousQueue q = new SynchronousQueue(fair);
195	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
196	>	Thread t = newStartedThread(new CheckedRunnable() {
197	>	public void realRun() throws InterruptedException {
198	>	long startTime = System.nanoTime();
199	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
200	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
201
202	<	public void testTimedPollWithOffer(){
203	<	final SynchronousQueue q = new SynchronousQueue();
204	<	Thread t = new Thread(new Runnable() {
205	<	public void run(){
206	<	try {
207	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
241	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
242	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
243	<	threadFail("Should block");
244	<	} catch (InterruptedException success) { }
245	<	}
246	<	});
247	<	try {
248	<	t.start();
249	<	Thread.sleep(SMALL_DELAY_MS);
250	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
251	<	t.interrupt();
252	<	t.join();
253	<	} catch (Exception e){
254	<	fail("Unexpected exception");
255	<	}
256	<	}
202	>	Thread.currentThread().interrupt();
203	>	try {
204	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
205	>	shouldThrow();
206	>	} catch (InterruptedException success) {}
207	>	assertFalse(Thread.interrupted());
208
209	+	pleaseInterrupt.countDown();
210	+	try {
211	+	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
212	+	shouldThrow();
213	+	} catch (InterruptedException success) {}
214	+	assertFalse(Thread.interrupted());
215	+	}});
216	+
217	+	await(pleaseInterrupt);
218	+	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 = ThreadLocalRandom.current().nextBoolean();
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 = ThreadLocalRandom.current().nextBoolean();
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	<	public void testPeek(){
276	<	SynchronousQueue q = new SynchronousQueue();
277	<	assertNull(q.peek());
278	<	}
275	>	Thread.currentThread().interrupt();
276	>	try {
277	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
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	>	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	<	}
270	<	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){
279	<	}
280	<	}
281	<
282	<	public void testRemoveElement(){
283	<	SynchronousQueue q = new SynchronousQueue();
284	<	assertFalse(q.remove(new Integer(0)));
285	<	assertTrue(q.isEmpty());
286	<	}
287	<
288	<	public void testContains(){
289	<	SynchronousQueue q = new SynchronousQueue();
290	<	assertFalse(q.contains(new Integer(0)));
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)));
313	<	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));
321	<	//        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[] o = q.toArray(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	<	}
356	<	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);
363	<	}
364	<
365	<
366	<	public void testOfferInExecutor() {
367	<	final SynchronousQueue q = new SynchronousQueue();
368	<	ExecutorService executor = Executors.newFixedThreadPool(2);
369	<	final Integer one = new Integer(1);
370	<
371	<	executor.execute(new Runnable() {
372	<	public void run() {
373	<	threadAssertFalse(q.offer(one));
374	<	try {
375	<	threadAssertTrue(q.offer(one, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
376	<	threadAssertEquals(0, q.remainingCapacity());
377	<	}
378	<	catch (InterruptedException e) {
379	<	threadFail("should not be interrupted");
380	<	}
381	<	}
382	<	});
383	<
384	<	executor.execute(new Runnable() {
385	<	public void run() {
386	<	try {
387	<	Thread.sleep(SMALL_DELAY_MS);
388	<	threadAssertEquals(one, q.take());
389	<	}
390	<	catch (InterruptedException e) {
391	<	fail("should not be interrupted");
392	<	}
393	<	}
394	<	});
395	<
396	<	joinPool(executor);
397	<
476	>	assertNotNull(s);
477		}
478
479	<	public void testPollInExecutor() {
480	<
481	<	final SynchronousQueue q = new SynchronousQueue();
482	<
483	<	ExecutorService executor = Executors.newFixedThreadPool(2);
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	>	}});
497
498	<	executor.execute(new Runnable() {
499	<	public void run() {
500	<	threadAssertNull(q.poll());
501	<	try {
502	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
503	<	threadAssertTrue(q.isEmpty());
504	<	}
413	<	catch (InterruptedException e) {
414	<	threadFail("should not be interrupted");
415	<	}
416	<	}
417	<	});
498	>	executor.execute(new CheckedRunnable() {
499	>	public void realRun() throws InterruptedException {
500	>	threadsStarted.await();
501	>	assertSame(one, q.take());
502	>	}});
503	>	}
504	>	}
505
506	<	executor.execute(new Runnable() {
507	<	public void run() {
508	<	try {
509	<	Thread.sleep(SMALL_DELAY_MS);
510	<	q.put(new Integer(1));
511	<	}
512	<	catch (InterruptedException e) {
513	<	threadFail("should not be interrupted");
514	<	}
515	<	}
516	<	});
517	<
518	<	joinPool(executor);
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	>	}});
523
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	<	SynchronousQueue q = new SynchronousQueue();
537	<	try {
538	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
539	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
540	<	out.writeObject(q);
541	<	out.close();
542	<
543	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
544	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
545	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
546	<	assertEquals(q.size(), r.size());
547	<	while (!q.isEmpty())
548	<	assertEquals(q.remove(), r.remove());
549	<	} catch(Exception e){
450	<	fail("unexpected exception");
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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