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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 1.67 by jsr166, Mon Dec 16 22:55:54 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);
294	<	t.interrupt();
295	<	t.join();
296	<	}
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	<	/**
210	<	* take blocks interruptibly when empty
211	<	*/
212	<	public void testFairTakeFromEmpty() throws InterruptedException {
213	<	final SynchronousQueue q = new SynchronousQueue(true);
214	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
305	<	public void realRun() throws InterruptedException {
306	<	q.take();
209	>	pleaseInterrupt.countDown();
210	>	try {
211	>	q.offer(new Object(), LONGER_DELAY_MS, MILLISECONDS);
212	>	shouldThrow();
213	>	} catch (InterruptedException success) {}
214	>	assertFalse(Thread.interrupted());
215		}});
216
217	<	t.start();
218	<	Thread.sleep(SHORT_DELAY_MS);
217	>	await(pleaseInterrupt);
218	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
219		t.interrupt();
220	<	t.join();
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();
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() throws InterruptedException {
237	<	SynchronousQueue q = new SynchronousQueue();
238	<	assertNull(q.poll(0, MILLISECONDS));
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() throws InterruptedException {
248	<	SynchronousQueue q = new SynchronousQueue();
249	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
247	>	public void testTimedPoll() {
248	>	final boolean fair = randomBoolean();
249	>	final SynchronousQueue q = new SynchronousQueue(fair);
250	>	final long startTime = System.nanoTime();
251	>	try { assertNull(q.poll(timeoutMillis(), MILLISECONDS)); }
252	>	catch (InterruptedException e) { threadUnexpectedException(e); }
253	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
254		}
255
256		/**
257	<	* Interrupted timed poll throws InterruptedException instead of
258	<	* returning timeout status
257	>	* timed poll before a delayed offer times out, returning null;
258	>	* after offer succeeds; on interruption throws
259		*/
260	<	public void testInterruptedTimedPoll() throws InterruptedException {
261	<	final SynchronousQueue q = new SynchronousQueue();
262	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
260	>	public void testTimedPollWithOffer() {
261	>	final boolean fair = randomBoolean();
262	>	final SynchronousQueue q = new SynchronousQueue(fair);
263	>	final CountDownLatch pleaseOffer = new CountDownLatch(1);
264	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
265	>	Thread t = newStartedThread(new CheckedRunnable() {
266		public void realRun() throws InterruptedException {
267	<	q.poll(SMALL_DELAY_MS, MILLISECONDS);
268	<	}});
267	>	long startTime = System.nanoTime();
268	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
269	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
270
271	<	t.start();
272	<	Thread.sleep(SHORT_DELAY_MS);
273	<	t.interrupt();
353	<	t.join();
354	<	}
271	>	pleaseOffer.countDown();
272	>	startTime = System.nanoTime();
273	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
274
275	<	/**
276	<	* Interrupted timed poll throws InterruptedException instead of
277	<	* returning timeout status
278	<	*/
279	<	public void testFairInterruptedTimedPoll() throws InterruptedException {
280	<	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	<	}
275	>	Thread.currentThread().interrupt();
276	>	try {
277	>	q.poll(randomTimeout(), randomTimeUnit());
278	>	shouldThrow();
279	>	} catch (InterruptedException success) {}
280	>	assertFalse(Thread.interrupted());
281
282	<	/**
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 {
282	>	pleaseInterrupt.countDown();
283		try {
382	–	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
383	–	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
284		q.poll(LONG_DELAY_MS, MILLISECONDS);
285	<	threadShouldThrow();
285	>	shouldThrow();
286		} catch (InterruptedException success) {}
287	+	assertFalse(Thread.interrupted());
288	+
289	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
290		}});
291
292	<	t.start();
293	<	Thread.sleep(SMALL_DELAY_MS);
294	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
292	>	await(pleaseOffer);
293	>	long startTime = System.nanoTime();
294	>	try { assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS)); }
295	>	catch (InterruptedException e) { threadUnexpectedException(e); }
296	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
297	>
298	>	await(pleaseInterrupt);
299	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
300		t.interrupt();
301	<	t.join();
301	>	awaitTermination(t);
302		}
303
396	–
304		/**
305	<	* peek returns null
305	>	* peek() returns null if no active putter
306		*/
307	<	public void testPeek() {
308	<	SynchronousQueue q = new SynchronousQueue();
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();
#	Line 414 | Line 325 | public class SynchronousQueueTest extend
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();
#	Line 425 | Line 338 | public class SynchronousQueueTest extend
338		}
339
340		/**
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	–	/**
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 453 | 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 464 | 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 475 | 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
486	–
400		/**
401		* toArray is empty
402		*/
403	<	public void testToArray() {
404	<	SynchronousQueue q = new SynchronousQueue();
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(o.length, 0);
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
432		/**
433		* toArray(null) throws NPE
434		*/
435	<	public void testToArray_BadArg() {
436	<	SynchronousQueue q = new SynchronousQueue();
435	>	public void testToArray_null()      { testToArray_null(false); }
436	>	public void testToArray_null_fair() { testToArray_null(true); }
437	>	public void testToArray_null(boolean fair) {
438	>	final SynchronousQueue q = new SynchronousQueue(fair);
439		try {
440	<	Object o[] = q.toArray(null);
440	>	Object[] unused = q.toArray((Object[])null);
441		shouldThrow();
442		} catch (NullPointerException success) {}
443		}
444
516	–
445		/**
446		* iterator does not traverse any elements
447		*/
448	<	public void testIterator() {
449	<	SynchronousQueue q = new SynchronousQueue();
450	<	Iterator it = q.iterator();
451	<	assertFalse(it.hasNext());
524	<	try {
525	<	Object x = it.next();
526	<	shouldThrow();
527	<	} catch (NoSuchElementException success) {}
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 ISE
455	>	* iterator remove throws IllegalStateException
456		*/
457	<	public void testIteratorRemove() {
458	<	SynchronousQueue q = new SynchronousQueue();
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();
#	Line 542 | Line 468 | public class SynchronousQueueTest extend
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		}
478
551	–
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	<
486	<	executor.execute(new CheckedRunnable() {
487	<	public void realRun() throws InterruptedException {
488	<	assertFalse(q.offer(one));
489	<	assertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
490	<	assertEquals(0, q.remainingCapacity());
491	<	}});
492	<
493	<	executor.execute(new CheckedRunnable() {
494	<	public void realRun() throws InterruptedException {
495	<	Thread.sleep(SMALL_DELAY_MS);
496	<	assertSame(one, q.take());
497	<	}});
498	<
499	<	joinPool(executor);
500	<	}
501	<
502	<	/**
503	<	* 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());
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 CheckedRunnable() {
499	>	public void realRun() throws InterruptedException {
500	>	threadsStarted.await();
501	>	assertSame(one, q.take());
502	>	}});
503	>	}
504		}
505
506		/**
507	<	* drainTo(null) throws NPE
507	>	* timed poll retrieves elements across Executor threads
508		*/
509	<	public void testDrainToNull() {
510	<	SynchronousQueue q = new SynchronousQueue();
511	<	try {
512	<	q.drainTo(null);
513	<	shouldThrow();
514	<	} catch (NullPointerException success) {}
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	<	* drainTo(this) throws IAE
533	>	* a deserialized/reserialized queue is usable
534		*/
535	<	public void testDrainToSelf() {
536	<	SynchronousQueue q = new SynchronousQueue();
537	<	try {
538	<	q.drainTo(q);
539	<	shouldThrow();
540	<	} catch (IllegalArgumentException success) {}
535	>	public void testSerialization() {
536	>	final SynchronousQueue x = new SynchronousQueue();
537	>	final SynchronousQueue y = new SynchronousQueue(false);
538	>	final SynchronousQueue z = new SynchronousQueue(true);
539	>	assertSerialEquals(x, y);
540	>	assertNotSerialEquals(x, z);
541	>	SynchronousQueue[] qs = { x, y, z };
542	>	for (SynchronousQueue q : qs) {
543	>	SynchronousQueue clone = serialClone(q);
544	>	assertNotSame(q, clone);
545	>	assertSerialEquals(q, clone);
546	>	assertTrue(clone.isEmpty());
547	>	assertEquals(0, clone.size());
548	>	assertEquals(0, clone.remainingCapacity());
549	>	assertFalse(clone.offer(zero));
550	>	}
551		}
552
553		/**
554		* drainTo(c) of empty queue doesn't transfer elements
555		*/
556	<	public void testDrainTo() {
557	<	SynchronousQueue q = new SynchronousQueue();
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(q.size(), 0);
563	<	assertEquals(l.size(), 0);
562	>	assertEquals(0, q.size());
563	>	assertEquals(0, l.size());
564		}
565
566		/**
567		* drainTo empties queue, unblocking a waiting put.
568		*/
569	<	public void testDrainToWithActivePut() 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 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
658	–	t.start();
578		ArrayList l = new ArrayList();
579	<	Thread.sleep(SHORT_DELAY_MS);
580	<	q.drainTo(l);
581	<	assertTrue(l.size() <= 1);
582	<	if (l.size() > 0)
583	<	assertEquals(l.get(0), new Integer(1));
584	<	t.join();
585	<	assertTrue(l.size() <= 1);
586	<	}
587	<
588	<	/**
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) {}
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		/**
#	Line 693 | Line 593 | public class SynchronousQueueTest extend
593		*/
594		public void testDrainToN() throws InterruptedException {
595		final SynchronousQueue q = new SynchronousQueue();
596	<	Thread t1 = new Thread(new CheckedRunnable() {
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
706	–	t1.start();
707	–	t2.start();
606		ArrayList l = new ArrayList();
607	<	Thread.sleep(SHORT_DELAY_MS);
608	<	q.drainTo(l, 1);
607	>	int drained;
608	>	while ((drained = q.drainTo(l, 1)) == 0) Thread.yield();
609	>	assertEquals(1, drained);
610		assertEquals(1, l.size());
611	<	q.drainTo(l, 1);
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	<	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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