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Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.22 by jsr166, Wed Aug 25 01:44:48 2010 UTC vs.
Revision 1.69 by jsr166, Wed Jan 27 01:57:24 2021 UTC

#	Line 1 | Line 1
1		/*
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/licenses/publicdomain
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.*;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	<	import java.io.*;
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	>
22	>	import junit.framework.Test;
23
24		public class SynchronousQueueTest extends JSR166TestCase {
25
26	<	public static void main(String[] args) {
27	<	junit.textui.TestRunner.run(suite());
26	>	public static class Fair extends BlockingQueueTest {
27	>	protected BlockingQueue emptyCollection() {
28	>	return new SynchronousQueue(true);
29	>	}
30		}
31
32	<	public static Test suite() {
33	<	return new TestSuite(SynchronousQueueTest.class);
32	>	public static class NonFair extends BlockingQueueTest {
33	>	protected BlockingQueue emptyCollection() {
34	>	return new SynchronousQueue(false);
35	>	}
36		}
37
38	<	/**
39	<	* A SynchronousQueue is both empty and full
27	<	*/
28	<	public void testEmptyFull() {
29	<	SynchronousQueue q = new SynchronousQueue();
30	<	assertTrue(q.isEmpty());
31	<	assertEquals(0, q.size());
32	<	assertEquals(0, q.remainingCapacity());
33	<	assertFalse(q.offer(zero));
34	<	}
35	<
36	<	/**
37	<	* A fair SynchronousQueue is both empty and full
38	<	*/
39	<	public void testFairEmptyFull() {
40	<	SynchronousQueue q = new SynchronousQueue(true);
41	<	assertTrue(q.isEmpty());
42	<	assertEquals(0, q.size());
43	<	assertEquals(0, q.remainingCapacity());
44	<	assertFalse(q.offer(zero));
38	>	public static void main(String[] args) {
39	>	main(suite(), args);
40		}
41
42	<	/**
43	<	* offer(null) throws NPE
44	<	*/
45	<	public void testOfferNull() {
51	<	try {
52	<	SynchronousQueue q = new SynchronousQueue();
53	<	q.offer(null);
54	<	shouldThrow();
55	<	} catch (NullPointerException success) {}
42	>	public static Test suite() {
43	>	return newTestSuite(SynchronousQueueTest.class,
44	>	new Fair().testSuite(),
45	>	new NonFair().testSuite());
46		}
47
48		/**
49	<	* add(null) throws NPE
49	>	* Any SynchronousQueue is both empty and full
50		*/
51	<	public void testAddNull() {
52	<	try {
53	<	SynchronousQueue q = new SynchronousQueue();
54	<	q.add(null);
55	<	shouldThrow();
56	<	} catch (NullPointerException success) {}
51	>	public void testEmptyFull()      { testEmptyFull(false); }
52	>	public void testEmptyFull_fair() { testEmptyFull(true); }
53	>	public void testEmptyFull(boolean fair) {
54	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
55	>	assertTrue(q.isEmpty());
56	>	mustEqual(0, q.size());
57	>	mustEqual(0, q.remainingCapacity());
58	>	assertFalse(q.offer(zero));
59		}
60
61		/**
62		* offer fails if no active taker
63		*/
64	<	public void testOffer() {
65	<	SynchronousQueue q = new SynchronousQueue();
64	>	public void testOffer()      { testOffer(false); }
65	>	public void testOffer_fair() { testOffer(true); }
66	>	public void testOffer(boolean fair) {
67	>	SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
68		assertFalse(q.offer(one));
69		}
70
71		/**
72	<	* add throws ISE if no active taker
72	>	* add throws IllegalStateException if no active taker
73		*/
74	<	public void testAdd() {
74	>	public void testAdd()      { testAdd(false); }
75	>	public void testAdd_fair() { testAdd(true); }
76	>	public void testAdd(boolean fair) {
77	>	SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
78	>	mustEqual(0, q.remainingCapacity());
79		try {
82	–	SynchronousQueue q = new SynchronousQueue();
83	–	assertEquals(0, q.remainingCapacity());
80		q.add(one);
81		shouldThrow();
82		} catch (IllegalStateException success) {}
83		}
84
85		/**
86	<	* addAll(null) throws NPE
86	>	* addAll(this) throws IllegalArgumentException
87		*/
88	<	public void testAddAll1() {
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<Item> q = new SynchronousQueue<>(fair);
92		try {
94	–	SynchronousQueue q = new SynchronousQueue();
95	–	q.addAll(null);
96	–	shouldThrow();
97	–	} catch (NullPointerException success) {}
98	–	}
99	–
100	–	/**
101	–	* addAll(this) throws IAE
102	–	*/
103	–	public void testAddAllSelf() {
104	–	try {
105	–	SynchronousQueue q = new SynchronousQueue();
93		q.addAll(q);
94		shouldThrow();
95		} catch (IllegalArgumentException success) {}
96		}
97
98	<	/**
99	<	* addAll of a collection with null elements throws NPE
98	>	/**S
99	>	* addAll throws IllegalStateException if no active taker
100		*/
101	<	public void testAddAll2() {
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<Item> q = new SynchronousQueue<>(fair);
105	>	Item[] items = seqItems(1);
106	>	Collection<Item> coll = Arrays.asList(items);
107		try {
108	<	SynchronousQueue q = new SynchronousQueue();
117	<	Integer[] ints = new Integer[1];
118	<	q.addAll(Arrays.asList(ints));
119	<	shouldThrow();
120	<	} catch (NullPointerException success) {}
121	<	}
122	<
123	<	/**
124	<	* addAll throws ISE if no active taker
125	<	*/
126	<	public void testAddAll4() {
127	<	try {
128	<	SynchronousQueue q = new SynchronousQueue();
129	<	Integer[] ints = new Integer[1];
130	<	for (int i = 0; i < 1; ++i)
131	<	ints[i] = new Integer(i);
132	<	q.addAll(Arrays.asList(ints));
108	>	q.addAll(coll);
109		shouldThrow();
110		} catch (IllegalStateException success) {}
111		}
112
113		/**
138	–	* put(null) throws NPE
139	–	*/
140	–	public void testPutNull() throws InterruptedException {
141	–	try {
142	–	SynchronousQueue q = new SynchronousQueue();
143	–	q.put(null);
144	–	shouldThrow();
145	–	} catch (NullPointerException success) {}
146	–	}
147	–
148	–	/**
114		* put blocks interruptibly if no active taker
115		*/
116	<	public void testBlockingPut() throws InterruptedException {
117	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
118	<	public void realRun() throws InterruptedException {
119	<	SynchronousQueue q = new SynchronousQueue();
120	<	q.put(zero);
121	<	}});
157	<
158	<	t.start();
159	<	Thread.sleep(SHORT_DELAY_MS);
160	<	t.interrupt();
161	<	t.join();
162	<	}
163	<
164	<	/**
165	<	* put blocks waiting for take
166	<	*/
167	<	public void testPutWithTake() throws InterruptedException {
168	<	final SynchronousQueue q = new SynchronousQueue();
169	<	Thread t = new Thread(new CheckedRunnable() {
116	>	public void testBlockingPut()      { testBlockingPut(false); }
117	>	public void testBlockingPut_fair() { testBlockingPut(true); }
118	>	public void testBlockingPut(boolean fair) {
119	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
120	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
121	>	Thread t = newStartedThread(new CheckedRunnable() {
122		public void realRun() throws InterruptedException {
123	<	int added = 0;
123	>	Thread.currentThread().interrupt();
124		try {
125	<	while (true) {
126	<	q.put(added);
127	<	++added;
128	<	}
177	<	} catch (InterruptedException success) {
178	<	assertTrue(added == 1);
179	<	}
180	<	}});
181	<
182	<	t.start();
183	<	Thread.sleep(SHORT_DELAY_MS);
184	<	assertEquals(0, q.take());
185	<	Thread.sleep(SHORT_DELAY_MS);
186	<	t.interrupt();
187	<	t.join();
188	<	}
125	>	q.put(ninetynine);
126	>	shouldThrow();
127	>	} catch (InterruptedException success) {}
128	>	assertFalse(Thread.interrupted());
129
130	<	/**
131	<	* timed offer times out if elements not taken
132	<	*/
133	<	public void testTimedOffer() throws InterruptedException {
134	<	final SynchronousQueue q = new SynchronousQueue();
135	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
196	<	public void realRun() throws InterruptedException {
197	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
198	<	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
130	>	pleaseInterrupt.countDown();
131	>	try {
132	>	q.put(ninetynine);
133	>	shouldThrow();
134	>	} catch (InterruptedException success) {}
135	>	assertFalse(Thread.interrupted());
136		}});
137
138	<	t.start();
139	<	Thread.sleep(SMALL_DELAY_MS);
138	>	await(pleaseInterrupt);
139	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
140		t.interrupt();
141	<	t.join();
141	>	awaitTermination(t);
142	>	mustEqual(0, q.remainingCapacity());
143		}
144
207	–
145		/**
146	<	* take blocks interruptibly when empty
146	>	* put blocks interruptibly waiting for take
147		*/
148	<	public void testTakeFromEmpty() throws InterruptedException {
149	<	final SynchronousQueue q = new SynchronousQueue();
150	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
148	>	public void testPutWithTake()      { testPutWithTake(false); }
149	>	public void testPutWithTake_fair() { testPutWithTake(true); }
150	>	public void testPutWithTake(boolean fair) {
151	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
152	>	final CountDownLatch pleaseTake = new CountDownLatch(1);
153	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
154	>	Thread t = newStartedThread(new CheckedRunnable() {
155		public void realRun() throws InterruptedException {
156	<	q.take();
157	<	}});
217	<
218	<	t.start();
219	<	Thread.sleep(SHORT_DELAY_MS);
220	<	t.interrupt();
221	<	t.join();
222	<	}
223	<
224	<
225	<	/**
226	<	* put blocks interruptibly if no active taker
227	<	*/
228	<	public void testFairBlockingPut() throws InterruptedException {
229	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
230	<	public void realRun() throws InterruptedException {
231	<	SynchronousQueue q = new SynchronousQueue(true);
232	<	q.put(zero);
233	<	}});
156	>	pleaseTake.countDown();
157	>	q.put(one);
158
159	<	t.start();
160	<	Thread.sleep(SHORT_DELAY_MS);
161	<	t.interrupt();
162	<	t.join();
163	<	}
159	>	Thread.currentThread().interrupt();
160	>	try {
161	>	q.put(ninetynine);
162	>	shouldThrow();
163	>	} catch (InterruptedException success) {}
164	>	assertFalse(Thread.interrupted());
165
166	<	/**
242	<	* put blocks waiting for take
243	<	*/
244	<	public void testFairPutWithTake() throws InterruptedException {
245	<	final SynchronousQueue q = new SynchronousQueue(true);
246	<	Thread t = new Thread(new CheckedRunnable() {
247	<	public void realRun() throws InterruptedException {
248	<	int added = 0;
166	>	pleaseInterrupt.countDown();
167		try {
168	<	while (true) {
169	<	q.put(added);
170	<	++added;
171	<	}
254	<	} catch (InterruptedException success) {
255	<	assertTrue(added == 1);
256	<	}
168	>	q.put(ninetynine);
169	>	shouldThrow();
170	>	} catch (InterruptedException success) {}
171	>	assertFalse(Thread.interrupted());
172		}});
173
174	<	t.start();
175	<	Thread.sleep(SHORT_DELAY_MS);
176	<	assertEquals(0, q.take());
177	<	Thread.sleep(SHORT_DELAY_MS);
174	>	await(pleaseTake);
175	>	mustEqual(0, q.remainingCapacity());
176	>	try { assertSame(one, q.take()); }
177	>	catch (InterruptedException e) { threadUnexpectedException(e); }
178	>
179	>	await(pleaseInterrupt);
180	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
181		t.interrupt();
182	<	t.join();
182	>	awaitTermination(t);
183	>	mustEqual(0, q.remainingCapacity());
184		}
185
186		/**
187		* timed offer times out if elements not taken
188		*/
189	<	public void testFairTimedOffer() throws InterruptedException {
190	<	final SynchronousQueue q = new SynchronousQueue(true);
191	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
189	>	public void testTimedOffer() {
190	>	final boolean fair = randomBoolean();
191	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
192	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
193	>	Thread t = newStartedThread(new CheckedRunnable() {
194		public void realRun() throws InterruptedException {
195	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
275	<	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
276	<	}});
195	>	long startTime = System.nanoTime();
196
197	<	t.start();
198	<	Thread.sleep(SMALL_DELAY_MS);
280	<	t.interrupt();
281	<	t.join();
282	<	}
197	>	assertFalse(q.offer(zero, timeoutMillis(), MILLISECONDS));
198	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
199
200	+	Thread.currentThread().interrupt();
201	+	try {
202	+	q.offer(one, randomTimeout(), randomTimeUnit());
203	+	shouldThrow();
204	+	} catch (InterruptedException success) {}
205	+	assertFalse(Thread.interrupted());
206
207	<	/**
208	<	* take blocks interruptibly when empty
209	<	*/
210	<	public void testFairTakeFromEmpty() throws InterruptedException {
211	<	final SynchronousQueue q = new SynchronousQueue(true);
212	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
291	<	public void realRun() throws InterruptedException {
292	<	q.take();
207	>	pleaseInterrupt.countDown();
208	>	try {
209	>	q.offer(two, LONGER_DELAY_MS, MILLISECONDS);
210	>	shouldThrow();
211	>	} catch (InterruptedException success) {}
212	>	assertFalse(Thread.interrupted());
213		}});
214
215	<	t.start();
216	<	Thread.sleep(SHORT_DELAY_MS);
215	>	await(pleaseInterrupt);
216	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
217		t.interrupt();
218	<	t.join();
218	>	awaitTermination(t);
219		}
220
221		/**
222	<	* poll fails unless active taker
222	>	* poll return null if no active putter
223		*/
224	<	public void testPoll() {
225	<	SynchronousQueue q = new SynchronousQueue();
224	>	public void testPoll()      { testPoll(false); }
225	>	public void testPoll_fair() { testPoll(true); }
226	>	public void testPoll(boolean fair) {
227	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
228		assertNull(q.poll());
229		}
230
231		/**
232	<	* timed pool with zero timeout times out if no active taker
232	>	* timed poll with zero timeout times out if no active putter
233		*/
234	<	public void testTimedPoll0() throws InterruptedException {
235	<	SynchronousQueue q = new SynchronousQueue();
236	<	assertNull(q.poll(0, MILLISECONDS));
234	>	public void testTimedPoll0()      { testTimedPoll0(false); }
235	>	public void testTimedPoll0_fair() { testTimedPoll0(true); }
236	>	public void testTimedPoll0(boolean fair) {
237	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
238	>	try { assertNull(q.poll(0, MILLISECONDS)); }
239	>	catch (InterruptedException e) { threadUnexpectedException(e); }
240		}
241
242		/**
243	<	* timed pool with nonzero timeout times out if no active taker
243	>	* timed poll with nonzero timeout times out if no active putter
244		*/
245	<	public void testTimedPoll() throws InterruptedException {
246	<	SynchronousQueue q = new SynchronousQueue();
247	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
245	>	public void testTimedPoll() {
246	>	final boolean fair = randomBoolean();
247	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
248	>	final long startTime = System.nanoTime();
249	>	try { assertNull(q.poll(timeoutMillis(), MILLISECONDS)); }
250	>	catch (InterruptedException e) { threadUnexpectedException(e); }
251	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
252		}
253
254		/**
255	<	* Interrupted timed poll throws InterruptedException instead of
256	<	* returning timeout status
255	>	* timed poll before a delayed offer times out, returning null;
256	>	* after offer succeeds; on interruption throws
257		*/
258	<	public void testInterruptedTimedPoll() throws InterruptedException {
259	<	final SynchronousQueue q = new SynchronousQueue();
260	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
258	>	public void testTimedPollWithOffer() {
259	>	final boolean fair = randomBoolean();
260	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
261	>	final CountDownLatch pleaseOffer = new CountDownLatch(1);
262	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
263	>	Thread t = newStartedThread(new CheckedRunnable() {
264		public void realRun() throws InterruptedException {
265	<	q.poll(SMALL_DELAY_MS, MILLISECONDS);
266	<	}});
265	>	long startTime = System.nanoTime();
266	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
267	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
268
269	<	t.start();
270	<	Thread.sleep(SHORT_DELAY_MS);
338	<	t.interrupt();
339	<	t.join();
340	<	}
341	<
342	<	/**
343	<	*  timed poll before a delayed offer fails; after offer succeeds;
344	<	*  on interruption throws
345	<	*/
346	<	public void testTimedPollWithOffer() throws InterruptedException {
347	<	final SynchronousQueue q = new SynchronousQueue();
348	<	Thread t = new Thread(new CheckedRunnable() {
349	<	public void realRun() throws InterruptedException {
350	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
269	>	pleaseOffer.countDown();
270	>	startTime = System.nanoTime();
271		assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
272	+
273	+	Thread.currentThread().interrupt();
274		try {
275	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
275	>	q.poll(randomTimeout(), randomTimeUnit());
276		shouldThrow();
277		} catch (InterruptedException success) {}
278	<	}});
357	<
358	<	t.start();
359	<	Thread.sleep(SMALL_DELAY_MS);
360	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
361	<	t.interrupt();
362	<	t.join();
363	<	}
364	<
365	<	/**
366	<	* Interrupted timed poll throws InterruptedException instead of
367	<	* returning timeout status
368	<	*/
369	<	public void testFairInterruptedTimedPoll() throws InterruptedException {
370	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
371	<	public void realRun() throws InterruptedException {
372	<	SynchronousQueue q = new SynchronousQueue(true);
373	<	q.poll(SMALL_DELAY_MS, MILLISECONDS);
374	<	}});
278	>	assertFalse(Thread.interrupted());
279
280	<	t.start();
377	<	Thread.sleep(SHORT_DELAY_MS);
378	<	t.interrupt();
379	<	t.join();
380	<	}
381	<
382	<	/**
383	<	*  timed poll before a delayed offer fails; after offer succeeds;
384	<	*  on interruption throws
385	<	*/
386	<	public void testFairTimedPollWithOffer() throws InterruptedException {
387	<	final SynchronousQueue q = new SynchronousQueue(true);
388	<	Thread t = new Thread(new CheckedRunnable() {
389	<	public void realRun() throws InterruptedException {
390	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
391	<	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
280	>	pleaseInterrupt.countDown();
281		try {
282		q.poll(LONG_DELAY_MS, MILLISECONDS);
283	<	threadShouldThrow();
283	>	shouldThrow();
284		} catch (InterruptedException success) {}
285	+	assertFalse(Thread.interrupted());
286	+
287	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
288		}});
289
290	<	t.start();
291	<	Thread.sleep(SMALL_DELAY_MS);
292	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
290	>	await(pleaseOffer);
291	>	long startTime = System.nanoTime();
292	>	try { assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS)); }
293	>	catch (InterruptedException e) { threadUnexpectedException(e); }
294	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
295	>
296	>	await(pleaseInterrupt);
297	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
298		t.interrupt();
299	<	t.join();
299	>	awaitTermination(t);
300		}
301
405	–
302		/**
303	<	* peek returns null
303	>	* peek() returns null if no active putter
304		*/
305	<	public void testPeek() {
306	<	SynchronousQueue q = new SynchronousQueue();
305	>	public void testPeek()      { testPeek(false); }
306	>	public void testPeek_fair() { testPeek(true); }
307	>	public void testPeek(boolean fair) {
308	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
309		assertNull(q.peek());
310		}
311
312		/**
313	<	* element throws NSEE
313	>	* element() throws NoSuchElementException if no active putter
314		*/
315	<	public void testElement() {
316	<	SynchronousQueue q = new SynchronousQueue();
315	>	public void testElement()      { testElement(false); }
316	>	public void testElement_fair() { testElement(true); }
317	>	public void testElement(boolean fair) {
318	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
319		try {
320		q.element();
321		shouldThrow();
#	Line 423 | Line 323 | public class SynchronousQueueTest extend
323		}
324
325		/**
326	<	* remove throws NSEE if no active taker
326	>	* remove() throws NoSuchElementException if no active putter
327		*/
328	<	public void testRemove() {
329	<	SynchronousQueue q = new SynchronousQueue();
328	>	public void testRemove()      { testRemove(false); }
329	>	public void testRemove_fair() { testRemove(true); }
330	>	public void testRemove(boolean fair) {
331	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
332		try {
333		q.remove();
334		shouldThrow();
#	Line 434 | Line 336 | public class SynchronousQueueTest extend
336		}
337
338		/**
437	–	* remove(x) returns false
438	–	*/
439	–	public void testRemoveElement() {
440	–	SynchronousQueue q = new SynchronousQueue();
441	–	assertFalse(q.remove(zero));
442	–	assertTrue(q.isEmpty());
443	–	}
444	–
445	–	/**
339		* contains returns false
340		*/
341	<	public void testContains() {
342	<	SynchronousQueue q = new SynchronousQueue();
341	>	public void testContains()      { testContains(false); }
342	>	public void testContains_fair() { testContains(true); }
343	>	public void testContains(boolean fair) {
344	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
345		assertFalse(q.contains(zero));
346		}
347
348		/**
349		* clear ensures isEmpty
350		*/
351	<	public void testClear() {
352	<	SynchronousQueue q = new SynchronousQueue();
351	>	public void testClear()      { testClear(false); }
352	>	public void testClear_fair() { testClear(true); }
353	>	public void testClear(boolean fair) {
354	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
355		q.clear();
356		assertTrue(q.isEmpty());
357		}
#	Line 462 | Line 359 | public class SynchronousQueueTest extend
359		/**
360		* containsAll returns false unless empty
361		*/
362	<	public void testContainsAll() {
363	<	SynchronousQueue q = new SynchronousQueue();
364	<	Integer[] empty = new Integer[0];
362	>	public void testContainsAll()      { testContainsAll(false); }
363	>	public void testContainsAll_fair() { testContainsAll(true); }
364	>	public void testContainsAll(boolean fair) {
365	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
366	>	Item[] empty = new Item[0];
367		assertTrue(q.containsAll(Arrays.asList(empty)));
368	<	Integer[] ints = new Integer[1]; ints[0] = zero;
369	<	assertFalse(q.containsAll(Arrays.asList(ints)));
368	>	Item[] items = new Item[1]; items[0] = zero;
369	>	assertFalse(q.containsAll(Arrays.asList(items)));
370		}
371
372		/**
373		* retainAll returns false
374		*/
375	<	public void testRetainAll() {
376	<	SynchronousQueue q = new SynchronousQueue();
377	<	Integer[] empty = new Integer[0];
375	>	public void testRetainAll()      { testRetainAll(false); }
376	>	public void testRetainAll_fair() { testRetainAll(true); }
377	>	public void testRetainAll(boolean fair) {
378	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
379	>	Item[] empty = new Item[0];
380		assertFalse(q.retainAll(Arrays.asList(empty)));
381	<	Integer[] ints = new Integer[1]; ints[0] = zero;
382	<	assertFalse(q.retainAll(Arrays.asList(ints)));
381	>	Item[] items = new Item[1]; items[0] = zero;
382	>	assertFalse(q.retainAll(Arrays.asList(items)));
383		}
384
385		/**
386		* removeAll returns false
387		*/
388	<	public void testRemoveAll() {
389	<	SynchronousQueue q = new SynchronousQueue();
390	<	Integer[] empty = new Integer[0];
388	>	public void testRemoveAll()      { testRemoveAll(false); }
389	>	public void testRemoveAll_fair() { testRemoveAll(true); }
390	>	public void testRemoveAll(boolean fair) {
391	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
392	>	Item[] empty = new Item[0];
393		assertFalse(q.removeAll(Arrays.asList(empty)));
394	<	Integer[] ints = new Integer[1]; ints[0] = zero;
395	<	assertFalse(q.containsAll(Arrays.asList(ints)));
394	>	Item[] items = new Item[1]; items[0] = zero;
395	>	assertFalse(q.containsAll(Arrays.asList(items)));
396		}
397
495	–
398		/**
399		* toArray is empty
400		*/
401	<	public void testToArray() {
402	<	SynchronousQueue q = new SynchronousQueue();
401	>	public void testToArray()      { testToArray(false); }
402	>	public void testToArray_fair() { testToArray(true); }
403	>	public void testToArray(boolean fair) {
404	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
405		Object[] o = q.toArray();
406	<	assertEquals(o.length, 0);
406	>	mustEqual(0, o.length);
407		}
408
409		/**
410	<	* toArray(a) is nulled at position 0
410	>	* toArray(Item array) returns its argument with the first
411	>	* element (if present) nulled out
412		*/
413	<	public void testToArray2() {
414	<	SynchronousQueue q = new SynchronousQueue();
415	<	Integer[] ints = new Integer[1];
416	<	assertNull(ints[0]);
413	>	public void testToArray2()      { testToArray2(false); }
414	>	public void testToArray2_fair() { testToArray2(true); }
415	>	public void testToArray2(boolean fair) {
416	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
417	>	Item[] a;
418	>
419	>	a = new Item[0];
420	>	assertSame(a, q.toArray(a));
421	>
422	>	a = new Item[3];
423	>	Arrays.fill(a, fortytwo);
424	>	assertSame(a, q.toArray(a));
425	>	assertNull(a[0]);
426	>	for (int i = 1; i < a.length; i++)
427	>	mustEqual(42, a[i]);
428		}
429
430		/**
431		* toArray(null) throws NPE
432		*/
433	<	public void testToArray_BadArg() {
434	<	SynchronousQueue q = new SynchronousQueue();
433	>	public void testToArray_null()      { testToArray_null(false); }
434	>	public void testToArray_null_fair() { testToArray_null(true); }
435	>	public void testToArray_null(boolean fair) {
436	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
437		try {
438	<	Object o[] = q.toArray(null);
438	>	Object[] unused = q.toArray((Object[])null);
439		shouldThrow();
440		} catch (NullPointerException success) {}
441		}
442
525	–
443		/**
444		* iterator does not traverse any elements
445		*/
446	<	public void testIterator() {
447	<	SynchronousQueue q = new SynchronousQueue();
448	<	Iterator it = q.iterator();
449	<	assertFalse(it.hasNext());
533	<	try {
534	<	Object x = it.next();
535	<	shouldThrow();
536	<	} catch (NoSuchElementException success) {}
446	>	public void testIterator()      { testIterator(false); }
447	>	public void testIterator_fair() { testIterator(true); }
448	>	public void testIterator(boolean fair) {
449	>	assertIteratorExhausted(new SynchronousQueue<Item>(fair).iterator());
450		}
451
452		/**
453	<	* iterator remove throws ISE
453	>	* iterator remove throws IllegalStateException
454		*/
455	<	public void testIteratorRemove() {
456	<	SynchronousQueue q = new SynchronousQueue();
457	<	Iterator it = q.iterator();
455	>	public void testIteratorRemove()      { testIteratorRemove(false); }
456	>	public void testIteratorRemove_fair() { testIteratorRemove(true); }
457	>	public void testIteratorRemove(boolean fair) {
458	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
459	>	Iterator<? extends Item> it = q.iterator();
460		try {
461		it.remove();
462		shouldThrow();
#	Line 551 | Line 466 | public class SynchronousQueueTest extend
466		/**
467		* toString returns a non-null string
468		*/
469	<	public void testToString() {
470	<	SynchronousQueue q = new SynchronousQueue();
469	>	public void testToString()      { testToString(false); }
470	>	public void testToString_fair() { testToString(true); }
471	>	public void testToString(boolean fair) {
472	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
473		String s = q.toString();
474		assertNotNull(s);
475		}
476
560	–
477		/**
478		* offer transfers elements across Executor tasks
479		*/
480	<	public void testOfferInExecutor() {
481	<	final SynchronousQueue q = new SynchronousQueue();
482	<	ExecutorService executor = Executors.newFixedThreadPool(2);
483	<
484	<	executor.execute(new CheckedRunnable() {
485	<	public void realRun() throws InterruptedException {
486	<	assertFalse(q.offer(one));
487	<	assertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
488	<	assertEquals(0, q.remainingCapacity());
489	<	}});
490	<
491	<	executor.execute(new CheckedRunnable() {
492	<	public void realRun() throws InterruptedException {
493	<	Thread.sleep(SMALL_DELAY_MS);
494	<	assertSame(one, q.take());
495	<	}});
496	<
497	<	joinPool(executor);
498	<	}
499	<
500	<	/**
501	<	* poll retrieves elements across Executor threads
502	<	*/
503	<	public void testPollInExecutor() {
504	<	final SynchronousQueue q = new SynchronousQueue();
505	<	ExecutorService executor = Executors.newFixedThreadPool(2);
506	<	executor.execute(new CheckedRunnable() {
507	<	public void realRun() throws InterruptedException {
508	<	assertNull(q.poll());
509	<	assertSame(one, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
510	<	assertTrue(q.isEmpty());
511	<	}});
512	<
513	<	executor.execute(new CheckedRunnable() {
514	<	public void realRun() throws InterruptedException {
515	<	Thread.sleep(SHORT_DELAY_MS);
516	<	q.put(one);
517	<	}});
518	<
519	<	joinPool(executor);
520	<	}
521	<
522	<	/**
523	<	* a deserialized serialized queue is usable
524	<	*/
525	<	public void testSerialization() throws Exception {
526	<	SynchronousQueue q = new SynchronousQueue();
527	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
528	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
529	<	out.writeObject(q);
530	<	out.close();
531	<
532	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
533	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
534	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
535	<	assertEquals(q.size(), r.size());
536	<	while (!q.isEmpty())
537	<	assertEquals(q.remove(), r.remove());
538	<	}
539	<
540	<	/**
541	<	* drainTo(null) throws NPE
542	<	*/
543	<	public void testDrainToNull() {
544	<	SynchronousQueue q = new SynchronousQueue();
545	<	try {
546	<	q.drainTo(null);
547	<	shouldThrow();
548	<	} catch (NullPointerException success) {}
549	<	}
550	<
635	<	/**
636	<	* drainTo(this) throws IAE
637	<	*/
638	<	public void testDrainToSelf() {
639	<	SynchronousQueue q = new SynchronousQueue();
640	<	try {
641	<	q.drainTo(q);
642	<	shouldThrow();
643	<	} catch (IllegalArgumentException success) {}
480	>	public void testOfferInExecutor()      { testOfferInExecutor(false); }
481	>	public void testOfferInExecutor_fair() { testOfferInExecutor(true); }
482	>	public void testOfferInExecutor(boolean fair) {
483	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
484	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
485	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
486	>	try (PoolCleaner cleaner = cleaner(executor)) {
487	>
488	>	executor.execute(new CheckedRunnable() {
489	>	public void realRun() throws InterruptedException {
490	>	assertFalse(q.offer(one));
491	>	threadsStarted.await();
492	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
493	>	mustEqual(0, q.remainingCapacity());
494	>	}});
495	>
496	>	executor.execute(new CheckedRunnable() {
497	>	public void realRun() throws InterruptedException {
498	>	threadsStarted.await();
499	>	assertSame(one, q.take());
500	>	}});
501	>	}
502	>	}
503	>
504	>	/**
505	>	* timed poll retrieves elements across Executor threads
506	>	*/
507	>	public void testPollInExecutor()      { testPollInExecutor(false); }
508	>	public void testPollInExecutor_fair() { testPollInExecutor(true); }
509	>	public void testPollInExecutor(boolean fair) {
510	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
511	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
512	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
513	>	try (PoolCleaner cleaner = cleaner(executor)) {
514	>	executor.execute(new CheckedRunnable() {
515	>	public void realRun() throws InterruptedException {
516	>	assertNull(q.poll());
517	>	threadsStarted.await();
518	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
519	>	assertTrue(q.isEmpty());
520	>	}});
521	>
522	>	executor.execute(new CheckedRunnable() {
523	>	public void realRun() throws InterruptedException {
524	>	threadsStarted.await();
525	>	q.put(one);
526	>	}});
527	>	}
528	>	}
529	>
530	>	/**
531	>	* a deserialized/reserialized queue is usable
532	>	*/
533	>	public void testSerialization() {
534	>	final SynchronousQueue<Item> x = new SynchronousQueue<>();
535	>	final SynchronousQueue<Item> y = new SynchronousQueue<>(false);
536	>	final SynchronousQueue<Item> z = new SynchronousQueue<>(true);
537	>	assertSerialEquals(x, y);
538	>	assertNotSerialEquals(x, z);
539	>	SynchronousQueue[] rqs = { x, y, z };
540	>	@SuppressWarnings("unchecked")
541	>	SynchronousQueue<Item>[] qs = (SynchronousQueue<Item>[])rqs;
542	>	for (SynchronousQueue<Item> q : qs) {
543	>	SynchronousQueue<Item> clone = serialClone(q);
544	>	assertNotSame(q, clone);
545	>	assertSerialEquals(q, clone);
546	>	assertTrue(clone.isEmpty());
547	>	mustEqual(0, clone.size());
548	>	mustEqual(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() {
557	<	SynchronousQueue q = new SynchronousQueue();
558	<	ArrayList l = new ArrayList();
556	>	public void testDrainTo()      { testDrainTo(false); }
557	>	public void testDrainTo_fair() { testDrainTo(true); }
558	>	public void testDrainTo(boolean fair) {
559	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
560	>	ArrayList<Item> l = new ArrayList<>();
561		q.drainTo(l);
562	<	assertEquals(q.size(), 0);
563	<	assertEquals(l.size(), 0);
562	>	mustEqual(0, q.size());
563	>	mustEqual(0, l.size());
564		}
565
566		/**
567		* drainTo empties queue, unblocking a waiting put.
568		*/
569	<	public void testDrainToWithActivePut() throws InterruptedException {
570	<	final SynchronousQueue q = new SynchronousQueue();
571	<	Thread t = new Thread(new CheckedRunnable() {
569	>	public void testDrainToWithActivePut()      { testDrainToWithActivePut(false); }
570	>	public void testDrainToWithActivePut_fair() { testDrainToWithActivePut(true); }
571	>	public void testDrainToWithActivePut(boolean fair) {
572	>	final SynchronousQueue<Item> q = new SynchronousQueue<>(fair);
573	>	Thread t = newStartedThread(new CheckedRunnable() {
574		public void realRun() throws InterruptedException {
575	<	q.put(new Integer(1));
575	>	q.put(one);
576		}});
577
578	<	t.start();
579	<	ArrayList l = new ArrayList();
580	<	Thread.sleep(SHORT_DELAY_MS);
581	<	q.drainTo(l);
582	<	assertTrue(l.size() <= 1);
583	<	if (l.size() > 0)
584	<	assertEquals(l.get(0), new Integer(1));
585	<	t.join();
586	<	assertTrue(l.size() <= 1);
587	<	}
588	<
678	<	/**
679	<	* drainTo(null, n) throws NPE
680	<	*/
681	<	public void testDrainToNullN() {
682	<	SynchronousQueue q = new SynchronousQueue();
683	<	try {
684	<	q.drainTo(null, 0);
685	<	shouldThrow();
686	<	} catch (NullPointerException success) {}
687	<	}
688	<
689	<	/**
690	<	* drainTo(this, n) throws IAE
691	<	*/
692	<	public void testDrainToSelfN() {
693	<	SynchronousQueue q = new SynchronousQueue();
694	<	try {
695	<	q.drainTo(q, 0);
696	<	shouldThrow();
697	<	} catch (IllegalArgumentException success) {}
578	>	ArrayList<Item> 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	>	mustEqual(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 = new Thread(new CheckedRunnable() {
595	>	final SynchronousQueue<Item> q = new SynchronousQueue<>();
596	>	Thread t1 = newStartedThread(new CheckedRunnable() {
597		public void realRun() throws InterruptedException {
598		q.put(one);
599		}});
600
601	<	Thread t2 = new Thread(new CheckedRunnable() {
601	>	Thread t2 = newStartedThread(new CheckedRunnable() {
602		public void realRun() throws InterruptedException {
603		q.put(two);
604		}});
605
606	<	t1.start();
607	<	t2.start();
608	<	ArrayList l = new ArrayList();
609	<	Thread.sleep(SHORT_DELAY_MS);
610	<	q.drainTo(l, 1);
611	<	assertTrue(l.size() == 1);
612	<	q.drainTo(l, 1);
613	<	assertTrue(l.size() == 2);
606	>	ArrayList<Item> l = new ArrayList<>();
607	>	int drained;
608	>	while ((drained = q.drainTo(l, 1)) == 0) Thread.yield();
609	>	mustEqual(1, drained);
610	>	mustEqual(1, l.size());
611	>	while ((drained = q.drainTo(l, 1)) == 0) Thread.yield();
612	>	mustEqual(1, drained);
613	>	mustEqual(2, l.size());
614		assertTrue(l.contains(one));
615		assertTrue(l.contains(two));
616	<	t1.join();
617	<	t2.join();
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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