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Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.5 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.62 by jsr166, Fri Jun 22 00:04:58 2018 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
10	<	import java.util.*;
11	<	import java.util.concurrent.*;
12	<	import java.io.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	>
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	>	import junit.framework.Test;
24
25		public class SynchronousQueueTest extends JSR166TestCase {
26
27	+	public static class Fair extends BlockingQueueTest {
28	+	protected BlockingQueue emptyCollection() {
29	+	return new SynchronousQueue(true);
30	+	}
31	+	}
32	+
33	+	public static class NonFair extends BlockingQueueTest {
34	+	protected BlockingQueue emptyCollection() {
35	+	return new SynchronousQueue(false);
36	+	}
37	+	}
38	+
39		public static void main(String[] args) {
40	<	junit.textui.TestRunner.run (suite());
40	>	main(suite(), args);
41		}
42
43		public static Test suite() {
44	<	return new TestSuite(SynchronousQueueTest.class);
44	>	return newTestSuite(SynchronousQueueTest.class,
45	>	new Fair().testSuite(),
46	>	new NonFair().testSuite());
47		}
48
49		/**
50	<	* A SynchronousQueue is both empty and full
50	>	* Any SynchronousQueue is both empty and full
51		*/
52	<	public void testEmptyFull() {
53	<	SynchronousQueue q = new SynchronousQueue();
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());
57	>	assertEquals(0, q.size());
58		assertEquals(0, q.remainingCapacity());
59		assertFalse(q.offer(zero));
60		}
61
62		/**
35	–	* offer(null) throws NPE
36	–	*/
37	–	public void testOfferNull() {
38	–	try {
39	–	SynchronousQueue q = new SynchronousQueue();
40	–	q.offer(null);
41	–	shouldThrow();
42	–	} catch (NullPointerException success) { }
43	–	}
44	–
45	–	/**
63		* offer fails if no active taker
64		*/
65	<	public void testOffer() {
66	<	SynchronousQueue q = new SynchronousQueue();
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 ISE if no active taker
73	>	* add throws IllegalStateException if no active taker
74		*/
75	<	public void testAdd() {
76	<	try {
77	<	SynchronousQueue q = new SynchronousQueue();
78	<	assertEquals(0, q.remainingCapacity());
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		q.add(one);
82		shouldThrow();
83	<	} catch (IllegalStateException success){
63	<	}
83	>	} catch (IllegalStateException success) {}
84		}
85
86		/**
87	<	* addAll(null) throws NPE
68	<	*/
69	<	public void testAddAll1() {
70	<	try {
71	<	SynchronousQueue q = new SynchronousQueue();
72	<	q.addAll(null);
73	<	shouldThrow();
74	<	}
75	<	catch (NullPointerException success) {}
76	<	}
77	<	/**
78	<	* addAll of a collection with null elements throws NPE
87	>	* addAll(this) throws IllegalArgumentException
88		*/
89	<	public void testAddAll2() {
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	<	SynchronousQueue q = new SynchronousQueue();
83	<	Integer[] ints = new Integer[1];
84	<	q.addAll(Arrays.asList(ints));
94	>	q.addAll(q);
95		shouldThrow();
96	<	}
87	<	catch (NullPointerException success) {}
96	>	} catch (IllegalArgumentException success) {}
97		}
98	+
99		/**
100	<	* addAll throws ISE if no active taker
100	>	* addAll throws IllegalStateException if no active taker
101		*/
102	<	public void testAddAll4() {
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	<	SynchronousQueue q = new SynchronousQueue();
95	<	Integer[] ints = new Integer[1];
96	<	for (int i = 0; i < 1; ++i)
97	<	ints[i] = new Integer(i);
98	<	q.addAll(Arrays.asList(ints));
111	>	q.addAll(coll);
112		shouldThrow();
113	<	}
101	<	catch (IllegalStateException success) {}
113	>	} catch (IllegalStateException success) {}
114		}
115
116		/**
105	–	* put(null) throws NPE
106	–	*/
107	–	public void testPutNull() {
108	–	try {
109	–	SynchronousQueue q = new SynchronousQueue();
110	–	q.put(null);
111	–	shouldThrow();
112	–	}
113	–	catch (NullPointerException success){
114	–	}
115	–	catch (InterruptedException ie) {
116	–	unexpectedException();
117	–	}
118	–	}
119	–
120	–	/**
117		* put blocks interruptibly if no active taker
118		*/
119	<	public void testBlockingPut() {
120	<	Thread t = new Thread(new Runnable() {
121	<	public void run() {
122	<	try {
123	<	SynchronousQueue q = new SynchronousQueue();
124	<	q.put(zero);
125	<	threadShouldThrow();
126	<	} catch (InterruptedException ie){
127	<	}
128	<	}});
129	<	t.start();
130	<	try {
131	<	Thread.sleep(SHORT_DELAY_MS);
132	<	t.interrupt();
133	<	t.join();
134	<	}
135	<	catch (InterruptedException ie) {
136	<	unexpectedException();
137	<	}
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	>	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 waiting for take
149	>	* put blocks interruptibly waiting for take
150		*/
151	<	public void testPutWithTake() {
152	<	final SynchronousQueue q = new SynchronousQueue();
153	<	Thread t = new Thread(new Runnable() {
154	<	public void run() {
155	<	int added = 0;
156	<	try {
157	<	q.put(new Object());
158	<	++added;
159	<	q.put(new Object());
160	<	++added;
161	<	q.put(new Object());
162	<	++added;
163	<	q.put(new Object());
164	<	++added;
165	<	threadShouldThrow();
166	<	} catch (InterruptedException e){
167	<	assertTrue(added >= 1);
168	<	}
169	<	}
170	<	});
171	<	try {
172	<	t.start();
173	<	Thread.sleep(SHORT_DELAY_MS);
174	<	q.take();
175	<	Thread.sleep(SHORT_DELAY_MS);
176	<	t.interrupt();
177	<	t.join();
178	<	} catch (Exception e){
179	<	unexpectedException();
180	<	}
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	>	Thread.currentThread().interrupt();
163	>	try {
164	>	q.put(99);
165	>	shouldThrow();
166	>	} catch (InterruptedException success) {}
167	>	assertFalse(Thread.interrupted());
168	>
169	>	pleaseInterrupt.countDown();
170	>	try {
171	>	q.put(99);
172	>	shouldThrow();
173	>	} catch (InterruptedException success) {}
174	>	assertFalse(Thread.interrupted());
175	>	}});
176	>
177	>	await(pleaseTake);
178	>	assertEquals(0, q.remainingCapacity());
179	>	try { assertSame(one, q.take()); }
180	>	catch (InterruptedException e) { threadUnexpectedException(e); }
181	>
182	>	await(pleaseInterrupt);
183	>	assertThreadBlocks(t, Thread.State.WAITING);
184	>	t.interrupt();
185	>	awaitTermination(t);
186	>	assertEquals(0, q.remainingCapacity());
187		}
188
189		/**
190		* timed offer times out if elements not taken
191		*/
192		public void testTimedOffer() {
193	<	final SynchronousQueue q = new SynchronousQueue();
194	<	Thread t = new Thread(new Runnable() {
195	<	public void run() {
196	<	try {
197	<
198	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
199	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
200	<	threadShouldThrow();
191	<	} catch (InterruptedException success){}
192	<	}
193	<	});
194	<
195	<	try {
196	<	t.start();
197	<	Thread.sleep(SMALL_DELAY_MS);
198	<	t.interrupt();
199	<	t.join();
200	<	} catch (Exception e){
201	<	unexpectedException();
202	<	}
203	<	}
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	+	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	<	/**
210	<	* take blocks interruptibly when empty
211	<	*/
212	<	public void testTakeFromEmpty() {
213	<	final SynchronousQueue q = new SynchronousQueue();
214	<	Thread t = new Thread(new Runnable() {
215	<	public void run() {
216	<	try {
217	<	q.take();
218	<	threadShouldThrow();
219	<	} catch (InterruptedException success){ }
220	<	}
218	<	});
219	<	try {
220	<	t.start();
221	<	Thread.sleep(SHORT_DELAY_MS);
222	<	t.interrupt();
223	<	t.join();
224	<	} catch (Exception e){
225	<	unexpectedException();
226	<	}
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 fails unless active taker
224	>	* poll return null if no active putter
225		*/
226	<	public void testPoll() {
227	<	SynchronousQueue q = new SynchronousQueue();
228	<	assertNull(q.poll());
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 pool with zero timeout times out if no active taker
234	>	* timed poll with zero timeout times out if no active putter
235		*/
236	<	public void testTimedPoll0() {
237	<	try {
238	<	SynchronousQueue q = new SynchronousQueue();
239	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
240	<	} catch (InterruptedException e){
241	<	unexpectedException();
246	<	}
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 pool with nonzero timeout times out if no active taker
245	>	* timed poll with nonzero timeout times out if no active putter
246		*/
247		public void testTimedPoll() {
248	<	try {
249	<	SynchronousQueue q = new SynchronousQueue();
250	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
251	<	} catch (InterruptedException e){
252	<	unexpectedException();
253	<	}
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	<	* Interrupted timed poll throws InterruptedException instead of
258	<	* returning timeout status
264	<	*/
265	<	public void testInterruptedTimedPoll() {
266	<	Thread t = new Thread(new Runnable() {
267	<	public void run() {
268	<	try {
269	<	SynchronousQueue q = new SynchronousQueue();
270	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
271	<	} catch (InterruptedException success){
272	<	}
273	<	}});
274	<	t.start();
275	<	try {
276	<	Thread.sleep(SHORT_DELAY_MS);
277	<	t.interrupt();
278	<	t.join();
279	<	}
280	<	catch (InterruptedException ie) {
281	<	unexpectedException();
282	<	}
283	<	}
284	<
285	<	/**
286	<	*  timed poll before a delayed offer fails; after offer succeeds;
287	<	*  on interruption throws
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 SynchronousQueue q = new SynchronousQueue();
262	<	Thread t = new Thread(new Runnable() {
263	<	public void run() {
264	<	try {
265	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
266	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
267	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
268	<	threadShouldThrow();
269	<	} catch (InterruptedException success) { }
270	<	}
271	<	});
272	<	try {
273	<	t.start();
274	<	Thread.sleep(SMALL_DELAY_MS);
275	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
276	<	t.interrupt();
277	<	t.join();
278	<	} catch (Exception e){
279	<	unexpectedException();
280	<	}
310	<	}
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	>	Thread.currentThread().interrupt();
276	>	try {
277	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
278	>	shouldThrow();
279	>	} catch (InterruptedException success) {}
280	>	assertFalse(Thread.interrupted());
281
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
305	>	* peek() returns null if no active putter
306		*/
307	<	public void testPeek() {
308	<	SynchronousQueue q = new SynchronousQueue();
309	<	assertNull(q.peek());
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 NSEE
315	>	* element() throws NoSuchElementException if no active putter
316		*/
317	<	public void testElement() {
318	<	SynchronousQueue q = new SynchronousQueue();
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		shouldThrow();
324	<	}
330	<	catch (NoSuchElementException success) {}
324	>	} catch (NoSuchElementException success) {}
325		}
326
327		/**
328	<	* remove throws NSEE if no active taker
328	>	* remove() throws NoSuchElementException if no active putter
329		*/
330	<	public void testRemove() {
331	<	SynchronousQueue q = new SynchronousQueue();
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		shouldThrow();
337	<	} catch (NoSuchElementException success){
342	<	}
337	>	} catch (NoSuchElementException success) {}
338		}
339
340		/**
346	–	* remove(x) returns false
347	–	*/
348	–	public void testRemoveElement() {
349	–	SynchronousQueue q = new SynchronousQueue();
350	–	assertFalse(q.remove(zero));
351	–	assertTrue(q.isEmpty());
352	–	}
353	–
354	–	/**
341		* contains returns false
342		*/
343	<	public void testContains() {
344	<	SynchronousQueue q = new SynchronousQueue();
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() {
354	<	SynchronousQueue q = new SynchronousQueue();
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		}
#	Line 371 | Line 361 | public class SynchronousQueueTest extend
361		/**
362		* containsAll returns false unless empty
363		*/
364	<	public void testContainsAll() {
365	<	SynchronousQueue q = new SynchronousQueue();
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		assertTrue(q.containsAll(Arrays.asList(empty)));
370		Integer[] ints = new Integer[1]; ints[0] = zero;
#	Line 382 | Line 374 | public class SynchronousQueueTest extend
374		/**
375		* retainAll returns false
376		*/
377	<	public void testRetainAll() {
378	<	SynchronousQueue q = new SynchronousQueue();
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		assertFalse(q.retainAll(Arrays.asList(empty)));
383		Integer[] ints = new Integer[1]; ints[0] = zero;
#	Line 393 | Line 387 | public class SynchronousQueueTest extend
387		/**
388		* removeAll returns false
389		*/
390	<	public void testRemoveAll() {
391	<	SynchronousQueue q = new SynchronousQueue();
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		assertFalse(q.removeAll(Arrays.asList(empty)));
396		Integer[] ints = new Integer[1]; ints[0] = zero;
397		assertFalse(q.containsAll(Arrays.asList(ints)));
398		}
399
404	–
400		/**
401		* toArray is empty
402		*/
403	<	public void testToArray() {
404	<	SynchronousQueue q = new SynchronousQueue();
405	<	Object[] o = q.toArray();
406	<	assertEquals(o.length, 0);
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(a) is nulled at position 0
412	>	* toArray(Integer array) returns its argument with the first
413	>	* element (if present) nulled out
414		*/
415	<	public void testToArray2() {
416	<	SynchronousQueue q = new SynchronousQueue();
417	<	Integer[] ints = new Integer[1];
418	<	assertNull(ints[0]);
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	<
431	>
432		/**
433	<	* iterator does not traverse any elements
433	>	* toArray(null) throws NPE
434		*/
435	<	public void testIterator() {
436	<	SynchronousQueue q = new SynchronousQueue();
437	<	Iterator it = q.iterator();
438	<	assertFalse(it.hasNext());
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 x = it.next();
440	>	Object[] o = q.toArray((Object[])null);
441		shouldThrow();
442	<	}
434	<	catch (NoSuchElementException success) {}
442	>	} catch (NullPointerException success) {}
443		}
444
445		/**
446	<	* iterator remove throws ISE
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() {
458	<	SynchronousQueue q = new SynchronousQueue();
459	<	Iterator it = q.iterator();
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		shouldThrow();
465	<	}
447	<	catch (IllegalStateException success) {}
465	>	} catch (IllegalStateException success) {}
466		}
467
468		/**
469		* toString returns a non-null string
470		*/
471	<	public void testToString() {
472	<	SynchronousQueue q = new SynchronousQueue();
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		assertNotNull(s);
477	<	}
458	<
477	>	}
478
479		/**
480		* offer transfers elements across Executor tasks
481		*/
482	<	public void testOfferInExecutor() {
483	<	final SynchronousQueue q = new SynchronousQueue();
484	<	ExecutorService executor = Executors.newFixedThreadPool(2);
485	<	final Integer one = new Integer(1);
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	<	threadAssertFalse(q.offer(one));
501	<	try {
502	<	threadAssertTrue(q.offer(one, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
503	<	threadAssertEquals(0, q.remainingCapacity());
504	<	}
475	<	catch (InterruptedException e) {
476	<	threadUnexpectedException();
477	<	}
478	<	}
479	<	});
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	<	threadAssertEquals(one, q.take());
511	<	}
512	<	catch (InterruptedException e) {
513	<	threadUnexpectedException();
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	<	* poll retrieves elements across Executor threads
533	>	* a deserialized/reserialized queue is usable
534		*/
535	<	public void testPollInExecutor() {
536	<	final SynchronousQueue q = new SynchronousQueue();
537	<	ExecutorService executor = Executors.newFixedThreadPool(2);
538	<	executor.execute(new Runnable() {
539	<	public void run() {
540	<	threadAssertNull(q.poll());
541	<	try {
542	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
543	<	threadAssertTrue(q.isEmpty());
544	<	}
545	<	catch (InterruptedException e) {
546	<	threadUnexpectedException();
547	<	}
548	<	}
549	<	});
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	<	executor.execute(new Runnable() {
554	<	public void run() {
555	<	try {
556	<	Thread.sleep(SMALL_DELAY_MS);
557	<	q.put(new Integer(1));
558	<	}
559	<	catch (InterruptedException e) {
560	<	threadUnexpectedException();
561	<	}
562	<	}
563	<	});
527	<
528	<	joinPool(executor);
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	<	* a deserialized serialized queue is usable
567	>	* drainTo empties queue, unblocking a waiting put.
568		*/
569	<	public void testSerialization() {
570	<	SynchronousQueue q = new SynchronousQueue();
571	<	try {
572	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
573	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
574	<	out.writeObject(q);
575	<	out.close();
576	<
577	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
578	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
579	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
580	<	assertEquals(q.size(), r.size());
581	<	while (!q.isEmpty())
582	<	assertEquals(q.remove(), r.remove());
583	<	} catch(Exception e){
584	<	unexpectedException();
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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