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Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.26 by jsr166, Sat Oct 9 19:30:35 2010 UTC vs.
Revision 1.65 by jsr166, Tue Aug 13 23:06:39 2019 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
#	Line 27 | Line 36 | public class SynchronousQueueTest extend
36		}
37
38		public static void main(String[] args) {
39	<	junit.textui.TestRunner.run(suite());
39	>	main(suite(), args);
40		}
41
42		public static Test suite() {
#	Line 37 | Line 46 | public class SynchronousQueueTest extend
46		}
47
48		/**
49	<	* A SynchronousQueue is both empty and full
49	>	* Any SynchronousQueue is both empty and full
50		*/
51	<	public void testEmptyFull() {
52	<	SynchronousQueue q = new SynchronousQueue();
51	>	public void testEmptyFull()      { testEmptyFull(false); }
52	>	public void testEmptyFull_fair() { testEmptyFull(true); }
53	>	public void testEmptyFull(boolean fair) {
54	>	final SynchronousQueue q = new SynchronousQueue(fair);
55		assertTrue(q.isEmpty());
56		assertEquals(0, q.size());
57		assertEquals(0, q.remainingCapacity());
#	Line 48 | Line 59 | public class SynchronousQueueTest extend
59		}
60
61		/**
51	–	* A fair SynchronousQueue is both empty and full
52	–	*/
53	–	public void testFairEmptyFull() {
54	–	SynchronousQueue q = new SynchronousQueue(true);
55	–	assertTrue(q.isEmpty());
56	–	assertEquals(0, q.size());
57	–	assertEquals(0, q.remainingCapacity());
58	–	assertFalse(q.offer(zero));
59	–	}
60	–
61	–	/**
62	–	* offer(null) throws NPE
63	–	*/
64	–	public void testOfferNull() {
65	–	try {
66	–	SynchronousQueue q = new SynchronousQueue();
67	–	q.offer(null);
68	–	shouldThrow();
69	–	} catch (NullPointerException success) {}
70	–	}
71	–
72	–	/**
73	–	* add(null) throws NPE
74	–	*/
75	–	public void testAddNull() {
76	–	try {
77	–	SynchronousQueue q = new SynchronousQueue();
78	–	q.add(null);
79	–	shouldThrow();
80	–	} catch (NullPointerException success) {}
81	–	}
82	–
83	–	/**
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 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 q = new SynchronousQueue(fair);
78	>	assertEquals(0, q.remainingCapacity());
79		try {
96	–	SynchronousQueue q = new SynchronousQueue();
97	–	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 q = new SynchronousQueue(fair);
92		try {
108	–	SynchronousQueue q = new SynchronousQueue();
109	–	q.addAll(null);
110	–	shouldThrow();
111	–	} catch (NullPointerException success) {}
112	–	}
113	–
114	–	/**
115	–	* addAll(this) throws IAE
116	–	*/
117	–	public void testAddAllSelf() {
118	–	try {
119	–	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
127	<	*/
128	<	public void testAddAll2() {
129	<	try {
130	<	SynchronousQueue q = new SynchronousQueue();
131	<	Integer[] ints = new Integer[1];
132	<	q.addAll(Arrays.asList(ints));
133	<	shouldThrow();
134	<	} catch (NullPointerException success) {}
135	<	}
136	<
137	<	/**
138	<	* addAll throws ISE if no active taker
99	>	* addAll throws IllegalStateException if no active taker
100		*/
101	<	public void testAddAll4() {
101	>	public void testAddAll_ISE()      { testAddAll_ISE(false); }
102	>	public void testAddAll_ISE_fair() { testAddAll_ISE(true); }
103	>	public void testAddAll_ISE(boolean fair) {
104	>	SynchronousQueue q = new SynchronousQueue(fair);
105	>	Integer[] ints = new Integer[1];
106	>	for (int i = 0; i < ints.length; i++)
107	>	ints[i] = i;
108	>	Collection<Integer> coll = Arrays.asList(ints);
109		try {
110	<	SynchronousQueue q = new SynchronousQueue();
143	<	Integer[] ints = new Integer[1];
144	<	for (int i = 0; i < 1; ++i)
145	<	ints[i] = new Integer(i);
146	<	q.addAll(Arrays.asList(ints));
110	>	q.addAll(coll);
111		shouldThrow();
112		} catch (IllegalStateException success) {}
113		}
114
115		/**
152	–	* put(null) throws NPE
153	–	*/
154	–	public void testPutNull() throws InterruptedException {
155	–	try {
156	–	SynchronousQueue q = new SynchronousQueue();
157	–	q.put(null);
158	–	shouldThrow();
159	–	} catch (NullPointerException success) {}
160	–	}
161	–
162	–	/**
116		* put blocks interruptibly if no active taker
117		*/
118	<	public void testBlockingPut() throws InterruptedException {
119	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
120	<	public void realRun() throws InterruptedException {
121	<	SynchronousQueue q = new SynchronousQueue();
122	<	q.put(zero);
123	<	}});
171	<
172	<	t.start();
173	<	Thread.sleep(SHORT_DELAY_MS);
174	<	t.interrupt();
175	<	t.join();
176	<	}
177	<
178	<	/**
179	<	* put blocks waiting for take
180	<	*/
181	<	public void testPutWithTake() throws InterruptedException {
182	<	final SynchronousQueue q = new SynchronousQueue();
183	<	Thread t = new Thread(new CheckedRunnable() {
118	>	public void testBlockingPut()      { testBlockingPut(false); }
119	>	public void testBlockingPut_fair() { testBlockingPut(true); }
120	>	public void testBlockingPut(boolean fair) {
121	>	final SynchronousQueue q = new SynchronousQueue(fair);
122	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
123	>	Thread t = newStartedThread(new CheckedRunnable() {
124		public void realRun() throws InterruptedException {
125	<	int added = 0;
125	>	Thread.currentThread().interrupt();
126		try {
127	<	while (true) {
128	<	q.put(added);
129	<	++added;
130	<	}
191	<	} catch (InterruptedException success) {
192	<	assertEquals(1, added);
193	<	}
194	<	}});
195	<
196	<	t.start();
197	<	Thread.sleep(SHORT_DELAY_MS);
198	<	assertEquals(0, q.take());
199	<	Thread.sleep(SHORT_DELAY_MS);
200	<	t.interrupt();
201	<	t.join();
202	<	}
203	<
204	<	/**
205	<	* timed offer times out if elements not taken
206	<	*/
207	<	public void testTimedOffer() throws InterruptedException {
208	<	final SynchronousQueue q = new SynchronousQueue();
209	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
210	<	public void realRun() throws InterruptedException {
211	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
212	<	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
213	<	}});
214	<
215	<	t.start();
216	<	Thread.sleep(SMALL_DELAY_MS);
217	<	t.interrupt();
218	<	t.join();
219	<	}
220	<
127	>	q.put(99);
128	>	shouldThrow();
129	>	} catch (InterruptedException success) {}
130	>	assertFalse(Thread.interrupted());
131
132	<	/**
133	<	* take blocks interruptibly when empty
134	<	*/
135	<	public void testTakeFromEmpty() throws InterruptedException {
136	<	final SynchronousQueue q = new SynchronousQueue();
137	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
228	<	public void realRun() throws InterruptedException {
229	<	q.take();
132	>	pleaseInterrupt.countDown();
133	>	try {
134	>	q.put(99);
135	>	shouldThrow();
136	>	} catch (InterruptedException success) {}
137	>	assertFalse(Thread.interrupted());
138		}});
139
140	<	t.start();
141	<	Thread.sleep(SHORT_DELAY_MS);
140	>	await(pleaseInterrupt);
141	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
142		t.interrupt();
143	<	t.join();
143	>	awaitTermination(t);
144	>	assertEquals(0, q.remainingCapacity());
145		}
146
238	–
147		/**
148	<	* put blocks interruptibly if no active taker
148	>	* put blocks interruptibly waiting for take
149		*/
150	<	public void testFairBlockingPut() throws InterruptedException {
151	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
150	>	public void testPutWithTake()      { testPutWithTake(false); }
151	>	public void testPutWithTake_fair() { testPutWithTake(true); }
152	>	public void testPutWithTake(boolean fair) {
153	>	final SynchronousQueue q = new SynchronousQueue(fair);
154	>	final CountDownLatch pleaseTake = new CountDownLatch(1);
155	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
156	>	Thread t = newStartedThread(new CheckedRunnable() {
157		public void realRun() throws InterruptedException {
158	<	SynchronousQueue q = new SynchronousQueue(true);
159	<	q.put(zero);
247	<	}});
158	>	pleaseTake.countDown();
159	>	q.put(one);
160
161	<	t.start();
162	<	Thread.sleep(SHORT_DELAY_MS);
163	<	t.interrupt();
164	<	t.join();
165	<	}
161	>	Thread.currentThread().interrupt();
162	>	try {
163	>	q.put(99);
164	>	shouldThrow();
165	>	} catch (InterruptedException success) {}
166	>	assertFalse(Thread.interrupted());
167
168	<	/**
256	<	* put blocks waiting for take
257	<	*/
258	<	public void testFairPutWithTake() throws InterruptedException {
259	<	final SynchronousQueue q = new SynchronousQueue(true);
260	<	Thread t = new Thread(new CheckedRunnable() {
261	<	public void realRun() throws InterruptedException {
262	<	int added = 0;
168	>	pleaseInterrupt.countDown();
169		try {
170	<	while (true) {
171	<	q.put(added);
172	<	++added;
173	<	}
268	<	} catch (InterruptedException success) {
269	<	assertEquals(1, added);
270	<	}
170	>	q.put(99);
171	>	shouldThrow();
172	>	} catch (InterruptedException success) {}
173	>	assertFalse(Thread.interrupted());
174		}});
175
176	<	t.start();
177	<	Thread.sleep(SHORT_DELAY_MS);
178	<	assertEquals(0, q.take());
179	<	Thread.sleep(SHORT_DELAY_MS);
176	>	await(pleaseTake);
177	>	assertEquals(0, q.remainingCapacity());
178	>	try { assertSame(one, q.take()); }
179	>	catch (InterruptedException e) { threadUnexpectedException(e); }
180	>
181	>	await(pleaseInterrupt);
182	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
183		t.interrupt();
184	<	t.join();
184	>	awaitTermination(t);
185	>	assertEquals(0, q.remainingCapacity());
186		}
187
188		/**
189		* timed offer times out if elements not taken
190		*/
191	<	public void testFairTimedOffer() throws InterruptedException {
192	<	final SynchronousQueue q = new SynchronousQueue(true);
193	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
191	>	public void testTimedOffer() {
192	>	final boolean fair = randomBoolean();
193	>	final SynchronousQueue q = new SynchronousQueue(fair);
194	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
195	>	Thread t = newStartedThread(new CheckedRunnable() {
196		public void realRun() throws InterruptedException {
197	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
289	<	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
290	<	}});
197	>	long startTime = System.nanoTime();
198
199	<	t.start();
200	<	Thread.sleep(SMALL_DELAY_MS);
201	<	t.interrupt();
202	<	t.join();
203	<	}
199	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
200	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
201	>
202	>	Thread.currentThread().interrupt();
203	>	try {
204	>	q.offer(new Object(), randomTimeout(), randomTimeUnit());
205	>	shouldThrow();
206	>	} catch (InterruptedException success) {}
207	>	assertFalse(Thread.interrupted());
208
209	+	pleaseInterrupt.countDown();
210	+	try {
211	+	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
212	+	shouldThrow();
213	+	} catch (InterruptedException success) {}
214	+	assertFalse(Thread.interrupted());
215
216	<	/**
300	<	* take blocks interruptibly when empty
301	<	*/
302	<	public void testFairTakeFromEmpty() throws InterruptedException {
303	<	final SynchronousQueue q = new SynchronousQueue(true);
304	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
305	<	public void realRun() throws InterruptedException {
306	<	q.take();
216	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
217		}});
218
219	<	t.start();
220	<	Thread.sleep(SHORT_DELAY_MS);
219	>	await(pleaseInterrupt);
220	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
221		t.interrupt();
222	<	t.join();
222	>	awaitTermination(t);
223		}
224
225		/**
226	<	* poll fails unless active taker
226	>	* poll return null if no active putter
227		*/
228	<	public void testPoll() {
229	<	SynchronousQueue q = new SynchronousQueue();
228	>	public void testPoll()      { testPoll(false); }
229	>	public void testPoll_fair() { testPoll(true); }
230	>	public void testPoll(boolean fair) {
231	>	final SynchronousQueue q = new SynchronousQueue(fair);
232		assertNull(q.poll());
233		}
234
235		/**
236	<	* timed pool with zero timeout times out if no active taker
236	>	* timed poll with zero timeout times out if no active putter
237		*/
238	<	public void testTimedPoll0() throws InterruptedException {
239	<	SynchronousQueue q = new SynchronousQueue();
240	<	assertNull(q.poll(0, MILLISECONDS));
238	>	public void testTimedPoll0()      { testTimedPoll0(false); }
239	>	public void testTimedPoll0_fair() { testTimedPoll0(true); }
240	>	public void testTimedPoll0(boolean fair) {
241	>	final SynchronousQueue q = new SynchronousQueue(fair);
242	>	try { assertNull(q.poll(0, MILLISECONDS)); }
243	>	catch (InterruptedException e) { threadUnexpectedException(e); }
244		}
245
246		/**
247	<	* timed pool with nonzero timeout times out if no active taker
247	>	* timed poll with nonzero timeout times out if no active putter
248		*/
249	<	public void testTimedPoll() throws InterruptedException {
250	<	SynchronousQueue q = new SynchronousQueue();
251	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
249	>	public void testTimedPoll() {
250	>	final boolean fair = randomBoolean();
251	>	final SynchronousQueue q = new SynchronousQueue(fair);
252	>	final long startTime = System.nanoTime();
253	>	try { assertNull(q.poll(timeoutMillis(), MILLISECONDS)); }
254	>	catch (InterruptedException e) { threadUnexpectedException(e); }
255	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
256		}
257
258		/**
259	<	* Interrupted timed poll throws InterruptedException instead of
260	<	* returning timeout status
259	>	* timed poll before a delayed offer times out, returning null;
260	>	* after offer succeeds; on interruption throws
261		*/
262	<	public void testInterruptedTimedPoll() throws InterruptedException {
263	<	final SynchronousQueue q = new SynchronousQueue();
264	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
262	>	public void testTimedPollWithOffer() {
263	>	final boolean fair = randomBoolean();
264	>	final SynchronousQueue q = new SynchronousQueue(fair);
265	>	final CountDownLatch pleaseOffer = new CountDownLatch(1);
266	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
267	>	Thread t = newStartedThread(new CheckedRunnable() {
268		public void realRun() throws InterruptedException {
269	<	q.poll(SMALL_DELAY_MS, MILLISECONDS);
270	<	}});
269	>	long startTime = System.nanoTime();
270	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
271	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
272
273	<	t.start();
274	<	Thread.sleep(SHORT_DELAY_MS);
275	<	t.interrupt();
353	<	t.join();
354	<	}
273	>	pleaseOffer.countDown();
274	>	startTime = System.nanoTime();
275	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
276
277	<	/**
278	<	* Interrupted timed poll throws InterruptedException instead of
279	<	* returning timeout status
280	<	*/
281	<	public void testFairInterruptedTimedPoll() throws InterruptedException {
282	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
362	<	public void realRun() throws InterruptedException {
363	<	SynchronousQueue q = new SynchronousQueue(true);
364	<	q.poll(SMALL_DELAY_MS, MILLISECONDS);
365	<	}});
366	<
367	<	t.start();
368	<	Thread.sleep(SHORT_DELAY_MS);
369	<	t.interrupt();
370	<	t.join();
371	<	}
277	>	Thread.currentThread().interrupt();
278	>	try {
279	>	q.poll(randomTimeout(), randomTimeUnit());
280	>	shouldThrow();
281	>	} catch (InterruptedException success) {}
282	>	assertFalse(Thread.interrupted());
283
284	<	/**
374	<	* timed poll before a delayed offer fails; after offer succeeds;
375	<	* on interruption throws
376	<	*/
377	<	public void testFairTimedPollWithOffer() throws InterruptedException {
378	<	final SynchronousQueue q = new SynchronousQueue(true);
379	<	Thread t = new Thread(new CheckedRunnable() {
380	<	public void realRun() throws InterruptedException {
284	>	pleaseInterrupt.countDown();
285		try {
382	–	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
383	–	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
286		q.poll(LONG_DELAY_MS, MILLISECONDS);
287	<	threadShouldThrow();
287	>	shouldThrow();
288		} catch (InterruptedException success) {}
289	+	assertFalse(Thread.interrupted());
290	+
291	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
292		}});
293
294	<	t.start();
295	<	Thread.sleep(SMALL_DELAY_MS);
296	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
294	>	await(pleaseOffer);
295	>	long startTime = System.nanoTime();
296	>	try { assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS)); }
297	>	catch (InterruptedException e) { threadUnexpectedException(e); }
298	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
299	>
300	>	await(pleaseInterrupt);
301	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
302		t.interrupt();
303	<	t.join();
303	>	awaitTermination(t);
304		}
305
396	–
306		/**
307	<	* peek returns null
307	>	* peek() returns null if no active putter
308		*/
309	<	public void testPeek() {
310	<	SynchronousQueue q = new SynchronousQueue();
309	>	public void testPeek()      { testPeek(false); }
310	>	public void testPeek_fair() { testPeek(true); }
311	>	public void testPeek(boolean fair) {
312	>	final SynchronousQueue q = new SynchronousQueue(fair);
313		assertNull(q.peek());
314		}
315
316		/**
317	<	* element throws NSEE
317	>	* element() throws NoSuchElementException if no active putter
318		*/
319	<	public void testElement() {
320	<	SynchronousQueue q = new SynchronousQueue();
319	>	public void testElement()      { testElement(false); }
320	>	public void testElement_fair() { testElement(true); }
321	>	public void testElement(boolean fair) {
322	>	final SynchronousQueue q = new SynchronousQueue(fair);
323		try {
324		q.element();
325		shouldThrow();
#	Line 414 | Line 327 | public class SynchronousQueueTest extend
327		}
328
329		/**
330	<	* remove throws NSEE if no active taker
330	>	* remove() throws NoSuchElementException if no active putter
331		*/
332	<	public void testRemove() {
333	<	SynchronousQueue q = new SynchronousQueue();
332	>	public void testRemove()      { testRemove(false); }
333	>	public void testRemove_fair() { testRemove(true); }
334	>	public void testRemove(boolean fair) {
335	>	final SynchronousQueue q = new SynchronousQueue(fair);
336		try {
337		q.remove();
338		shouldThrow();
#	Line 425 | Line 340 | public class SynchronousQueueTest extend
340		}
341
342		/**
428	–	* remove(x) returns false
429	–	*/
430	–	public void testRemoveElement() {
431	–	SynchronousQueue q = new SynchronousQueue();
432	–	assertFalse(q.remove(zero));
433	–	assertTrue(q.isEmpty());
434	–	}
435	–
436	–	/**
343		* contains returns false
344		*/
345	<	public void testContains() {
346	<	SynchronousQueue q = new SynchronousQueue();
345	>	public void testContains()      { testContains(false); }
346	>	public void testContains_fair() { testContains(true); }
347	>	public void testContains(boolean fair) {
348	>	final SynchronousQueue q = new SynchronousQueue(fair);
349		assertFalse(q.contains(zero));
350		}
351
352		/**
353		* clear ensures isEmpty
354		*/
355	<	public void testClear() {
356	<	SynchronousQueue q = new SynchronousQueue();
355	>	public void testClear()      { testClear(false); }
356	>	public void testClear_fair() { testClear(true); }
357	>	public void testClear(boolean fair) {
358	>	final SynchronousQueue q = new SynchronousQueue(fair);
359		q.clear();
360		assertTrue(q.isEmpty());
361		}
#	Line 453 | Line 363 | public class SynchronousQueueTest extend
363		/**
364		* containsAll returns false unless empty
365		*/
366	<	public void testContainsAll() {
367	<	SynchronousQueue q = new SynchronousQueue();
366	>	public void testContainsAll()      { testContainsAll(false); }
367	>	public void testContainsAll_fair() { testContainsAll(true); }
368	>	public void testContainsAll(boolean fair) {
369	>	final SynchronousQueue q = new SynchronousQueue(fair);
370		Integer[] empty = new Integer[0];
371		assertTrue(q.containsAll(Arrays.asList(empty)));
372		Integer[] ints = new Integer[1]; ints[0] = zero;
#	Line 464 | Line 376 | public class SynchronousQueueTest extend
376		/**
377		* retainAll returns false
378		*/
379	<	public void testRetainAll() {
380	<	SynchronousQueue q = new SynchronousQueue();
379	>	public void testRetainAll()      { testRetainAll(false); }
380	>	public void testRetainAll_fair() { testRetainAll(true); }
381	>	public void testRetainAll(boolean fair) {
382	>	final SynchronousQueue q = new SynchronousQueue(fair);
383		Integer[] empty = new Integer[0];
384		assertFalse(q.retainAll(Arrays.asList(empty)));
385		Integer[] ints = new Integer[1]; ints[0] = zero;
#	Line 475 | Line 389 | public class SynchronousQueueTest extend
389		/**
390		* removeAll returns false
391		*/
392	<	public void testRemoveAll() {
393	<	SynchronousQueue q = new SynchronousQueue();
392	>	public void testRemoveAll()      { testRemoveAll(false); }
393	>	public void testRemoveAll_fair() { testRemoveAll(true); }
394	>	public void testRemoveAll(boolean fair) {
395	>	final SynchronousQueue q = new SynchronousQueue(fair);
396		Integer[] empty = new Integer[0];
397		assertFalse(q.removeAll(Arrays.asList(empty)));
398		Integer[] ints = new Integer[1]; ints[0] = zero;
399		assertFalse(q.containsAll(Arrays.asList(ints)));
400		}
401
486	–
402		/**
403		* toArray is empty
404		*/
405	<	public void testToArray() {
406	<	SynchronousQueue q = new SynchronousQueue();
405	>	public void testToArray()      { testToArray(false); }
406	>	public void testToArray_fair() { testToArray(true); }
407	>	public void testToArray(boolean fair) {
408	>	final SynchronousQueue q = new SynchronousQueue(fair);
409		Object[] o = q.toArray();
410	<	assertEquals(o.length, 0);
410	>	assertEquals(0, o.length);
411		}
412
413		/**
414	<	* toArray(a) is nulled at position 0
414	>	* toArray(Integer array) returns its argument with the first
415	>	* element (if present) nulled out
416		*/
417	<	public void testToArray2() {
418	<	SynchronousQueue q = new SynchronousQueue();
419	<	Integer[] ints = new Integer[1];
420	<	assertNull(ints[0]);
417	>	public void testToArray2()      { testToArray2(false); }
418	>	public void testToArray2_fair() { testToArray2(true); }
419	>	public void testToArray2(boolean fair) {
420	>	final SynchronousQueue<Integer> q = new SynchronousQueue<>(fair);
421	>	Integer[] a;
422	>
423	>	a = new Integer[0];
424	>	assertSame(a, q.toArray(a));
425	>
426	>	a = new Integer[3];
427	>	Arrays.fill(a, 42);
428	>	assertSame(a, q.toArray(a));
429	>	assertNull(a[0]);
430	>	for (int i = 1; i < a.length; i++)
431	>	assertEquals(42, (int) a[i]);
432		}
433
434		/**
435		* toArray(null) throws NPE
436		*/
437	<	public void testToArray_BadArg() {
438	<	SynchronousQueue q = new SynchronousQueue();
437	>	public void testToArray_null()      { testToArray_null(false); }
438	>	public void testToArray_null_fair() { testToArray_null(true); }
439	>	public void testToArray_null(boolean fair) {
440	>	final SynchronousQueue q = new SynchronousQueue(fair);
441		try {
442	<	Object o[] = q.toArray(null);
442	>	Object[] o = q.toArray((Object[])null);
443		shouldThrow();
444		} catch (NullPointerException success) {}
445		}
446
516	–
447		/**
448		* iterator does not traverse any elements
449		*/
450	<	public void testIterator() {
451	<	SynchronousQueue q = new SynchronousQueue();
452	<	Iterator it = q.iterator();
453	<	assertFalse(it.hasNext());
524	<	try {
525	<	Object x = it.next();
526	<	shouldThrow();
527	<	} catch (NoSuchElementException success) {}
450	>	public void testIterator()      { testIterator(false); }
451	>	public void testIterator_fair() { testIterator(true); }
452	>	public void testIterator(boolean fair) {
453	>	assertIteratorExhausted(new SynchronousQueue(fair).iterator());
454		}
455
456		/**
457	<	* iterator remove throws ISE
457	>	* iterator remove throws IllegalStateException
458		*/
459	<	public void testIteratorRemove() {
460	<	SynchronousQueue q = new SynchronousQueue();
459	>	public void testIteratorRemove()      { testIteratorRemove(false); }
460	>	public void testIteratorRemove_fair() { testIteratorRemove(true); }
461	>	public void testIteratorRemove(boolean fair) {
462	>	final SynchronousQueue q = new SynchronousQueue(fair);
463		Iterator it = q.iterator();
464		try {
465		it.remove();
#	Line 542 | Line 470 | public class SynchronousQueueTest extend
470		/**
471		* toString returns a non-null string
472		*/
473	<	public void testToString() {
474	<	SynchronousQueue q = new SynchronousQueue();
473	>	public void testToString()      { testToString(false); }
474	>	public void testToString_fair() { testToString(true); }
475	>	public void testToString(boolean fair) {
476	>	final SynchronousQueue q = new SynchronousQueue(fair);
477		String s = q.toString();
478		assertNotNull(s);
479		}
480
551	–
481		/**
482		* offer transfers elements across Executor tasks
483		*/
484	<	public void testOfferInExecutor() {
485	<	final SynchronousQueue q = new SynchronousQueue();
486	<	ExecutorService executor = Executors.newFixedThreadPool(2);
487	<
488	<	executor.execute(new CheckedRunnable() {
489	<	public void realRun() throws InterruptedException {
490	<	assertFalse(q.offer(one));
491	<	assertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
492	<	assertEquals(0, q.remainingCapacity());
493	<	}});
494	<
495	<	executor.execute(new CheckedRunnable() {
496	<	public void realRun() throws InterruptedException {
497	<	Thread.sleep(SMALL_DELAY_MS);
498	<	assertSame(one, q.take());
499	<	}});
500	<
501	<	joinPool(executor);
502	<	}
503	<
504	<	/**
505	<	* poll retrieves elements across Executor threads
577	<	*/
578	<	public void testPollInExecutor() {
579	<	final SynchronousQueue q = new SynchronousQueue();
580	<	ExecutorService executor = Executors.newFixedThreadPool(2);
581	<	executor.execute(new CheckedRunnable() {
582	<	public void realRun() throws InterruptedException {
583	<	assertNull(q.poll());
584	<	assertSame(one, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
585	<	assertTrue(q.isEmpty());
586	<	}});
587	<
588	<	executor.execute(new CheckedRunnable() {
589	<	public void realRun() throws InterruptedException {
590	<	Thread.sleep(SHORT_DELAY_MS);
591	<	q.put(one);
592	<	}});
593	<
594	<	joinPool(executor);
595	<	}
596	<
597	<	/**
598	<	* a deserialized serialized queue is usable
599	<	*/
600	<	public void testSerialization() throws Exception {
601	<	SynchronousQueue q = new SynchronousQueue();
602	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
603	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
604	<	out.writeObject(q);
605	<	out.close();
606	<
607	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
608	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
609	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
610	<	assertEquals(q.size(), r.size());
611	<	while (!q.isEmpty())
612	<	assertEquals(q.remove(), r.remove());
484	>	public void testOfferInExecutor()      { testOfferInExecutor(false); }
485	>	public void testOfferInExecutor_fair() { testOfferInExecutor(true); }
486	>	public void testOfferInExecutor(boolean fair) {
487	>	final SynchronousQueue q = new SynchronousQueue(fair);
488	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
489	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
490	>	try (PoolCleaner cleaner = cleaner(executor)) {
491	>
492	>	executor.execute(new CheckedRunnable() {
493	>	public void realRun() throws InterruptedException {
494	>	assertFalse(q.offer(one));
495	>	threadsStarted.await();
496	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
497	>	assertEquals(0, q.remainingCapacity());
498	>	}});
499	>
500	>	executor.execute(new CheckedRunnable() {
501	>	public void realRun() throws InterruptedException {
502	>	threadsStarted.await();
503	>	assertSame(one, q.take());
504	>	}});
505	>	}
506		}
507
508		/**
509	<	* drainTo(null) throws NPE
509	>	* timed poll retrieves elements across Executor threads
510		*/
511	<	public void testDrainToNull() {
512	<	SynchronousQueue q = new SynchronousQueue();
513	<	try {
514	<	q.drainTo(null);
515	<	shouldThrow();
516	<	} catch (NullPointerException success) {}
511	>	public void testPollInExecutor()      { testPollInExecutor(false); }
512	>	public void testPollInExecutor_fair() { testPollInExecutor(true); }
513	>	public void testPollInExecutor(boolean fair) {
514	>	final SynchronousQueue q = new SynchronousQueue(fair);
515	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
516	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
517	>	try (PoolCleaner cleaner = cleaner(executor)) {
518	>	executor.execute(new CheckedRunnable() {
519	>	public void realRun() throws InterruptedException {
520	>	assertNull(q.poll());
521	>	threadsStarted.await();
522	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
523	>	assertTrue(q.isEmpty());
524	>	}});
525	>
526	>	executor.execute(new CheckedRunnable() {
527	>	public void realRun() throws InterruptedException {
528	>	threadsStarted.await();
529	>	q.put(one);
530	>	}});
531	>	}
532		}
533
534		/**
535	<	* drainTo(this) throws IAE
535	>	* a deserialized/reserialized queue is usable
536		*/
537	<	public void testDrainToSelf() {
538	<	SynchronousQueue q = new SynchronousQueue();
539	<	try {
540	<	q.drainTo(q);
541	<	shouldThrow();
542	<	} catch (IllegalArgumentException success) {}
537	>	public void testSerialization() {
538	>	final SynchronousQueue x = new SynchronousQueue();
539	>	final SynchronousQueue y = new SynchronousQueue(false);
540	>	final SynchronousQueue z = new SynchronousQueue(true);
541	>	assertSerialEquals(x, y);
542	>	assertNotSerialEquals(x, z);
543	>	SynchronousQueue[] qs = { x, y, z };
544	>	for (SynchronousQueue q : qs) {
545	>	SynchronousQueue clone = serialClone(q);
546	>	assertNotSame(q, clone);
547	>	assertSerialEquals(q, clone);
548	>	assertTrue(clone.isEmpty());
549	>	assertEquals(0, clone.size());
550	>	assertEquals(0, clone.remainingCapacity());
551	>	assertFalse(clone.offer(zero));
552	>	}
553		}
554
555		/**
556		* drainTo(c) of empty queue doesn't transfer elements
557		*/
558	<	public void testDrainTo() {
559	<	SynchronousQueue q = new SynchronousQueue();
558	>	public void testDrainTo()      { testDrainTo(false); }
559	>	public void testDrainTo_fair() { testDrainTo(true); }
560	>	public void testDrainTo(boolean fair) {
561	>	final SynchronousQueue q = new SynchronousQueue(fair);
562		ArrayList l = new ArrayList();
563		q.drainTo(l);
564	<	assertEquals(q.size(), 0);
565	<	assertEquals(l.size(), 0);
564	>	assertEquals(0, q.size());
565	>	assertEquals(0, l.size());
566		}
567
568		/**
569		* drainTo empties queue, unblocking a waiting put.
570		*/
571	<	public void testDrainToWithActivePut() throws InterruptedException {
572	<	final SynchronousQueue q = new SynchronousQueue();
573	<	Thread t = new Thread(new CheckedRunnable() {
571	>	public void testDrainToWithActivePut()      { testDrainToWithActivePut(false); }
572	>	public void testDrainToWithActivePut_fair() { testDrainToWithActivePut(true); }
573	>	public void testDrainToWithActivePut(boolean fair) {
574	>	final SynchronousQueue q = new SynchronousQueue(fair);
575	>	Thread t = newStartedThread(new CheckedRunnable() {
576		public void realRun() throws InterruptedException {
577	<	q.put(new Integer(1));
577	>	q.put(one);
578		}});
579
658	–	t.start();
580		ArrayList l = new ArrayList();
581	<	Thread.sleep(SHORT_DELAY_MS);
582	<	q.drainTo(l);
583	<	assertTrue(l.size() <= 1);
584	<	if (l.size() > 0)
585	<	assertEquals(l.get(0), new Integer(1));
586	<	t.join();
587	<	assertTrue(l.size() <= 1);
588	<	}
589	<
590	<	/**
670	<	* drainTo(null, n) throws NPE
671	<	*/
672	<	public void testDrainToNullN() {
673	<	SynchronousQueue q = new SynchronousQueue();
674	<	try {
675	<	q.drainTo(null, 0);
676	<	shouldThrow();
677	<	} catch (NullPointerException success) {}
678	<	}
679	<
680	<	/**
681	<	* drainTo(this, n) throws IAE
682	<	*/
683	<	public void testDrainToSelfN() {
684	<	SynchronousQueue q = new SynchronousQueue();
685	<	try {
686	<	q.drainTo(q, 0);
687	<	shouldThrow();
688	<	} catch (IllegalArgumentException success) {}
581	>	long startTime = System.nanoTime();
582	>	while (l.isEmpty()) {
583	>	q.drainTo(l);
584	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
585	>	fail("timed out");
586	>	Thread.yield();
587	>	}
588	>	assertEquals(1, l.size());
589	>	assertSame(one, l.get(0));
590	>	awaitTermination(t);
591		}
592
593		/**
#	Line 693 | Line 595 | public class SynchronousQueueTest extend
595		*/
596		public void testDrainToN() throws InterruptedException {
597		final SynchronousQueue q = new SynchronousQueue();
598	<	Thread t1 = new Thread(new CheckedRunnable() {
598	>	Thread t1 = newStartedThread(new CheckedRunnable() {
599		public void realRun() throws InterruptedException {
600		q.put(one);
601		}});
602
603	<	Thread t2 = new Thread(new CheckedRunnable() {
603	>	Thread t2 = newStartedThread(new CheckedRunnable() {
604		public void realRun() throws InterruptedException {
605		q.put(two);
606		}});
607
706	–	t1.start();
707	–	t2.start();
608		ArrayList l = new ArrayList();
609	<	Thread.sleep(SHORT_DELAY_MS);
610	<	q.drainTo(l, 1);
609	>	int drained;
610	>	while ((drained = q.drainTo(l, 1)) == 0) Thread.yield();
611	>	assertEquals(1, drained);
612		assertEquals(1, l.size());
613	<	q.drainTo(l, 1);
613	>	while ((drained = q.drainTo(l, 1)) == 0) Thread.yield();
614	>	assertEquals(1, drained);
615		assertEquals(2, l.size());
616		assertTrue(l.contains(one));
617		assertTrue(l.contains(two));
618	<	t1.join();
619	<	t2.join();
618	>	awaitTermination(t1);
619	>	awaitTermination(t2);
620	>	}
621	>
622	>	/**
623	>	* remove(null), contains(null) always return false
624	>	*/
625	>	public void testNeverContainsNull() {
626	>	Collection<?> q = new SynchronousQueue();
627	>	assertFalse(q.contains(null));
628	>	assertFalse(q.remove(null));
629		}
630
631		}

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