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Comparing jsr166/src/test/tck/ArrayBlockingQueueTest.java (file contents):
Revision 1.8 by dl, Mon Dec 29 19:05:40 2003 UTC vs.
Revision 1.58 by jsr166, Wed Dec 31 19:05:42 2014 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
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
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 static java.util.concurrent.TimeUnit.MILLISECONDS;
10
11	<	import junit.framework.*;
12	<	import java.util.*;
13	<	import java.util.concurrent.*;
14	<	import java.io.*;
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.Queue;
17	>	import java.util.concurrent.ArrayBlockingQueue;
18	>	import java.util.concurrent.BlockingQueue;
19	>	import java.util.concurrent.CountDownLatch;
20	>	import java.util.concurrent.Executors;
21	>	import java.util.concurrent.ExecutorService;
22	>
23	>	import junit.framework.Test;
24
25		public class ArrayBlockingQueueTest extends JSR166TestCase {
26	+
27	+	public static class Fair extends BlockingQueueTest {
28	+	protected BlockingQueue emptyCollection() {
29	+	return new ArrayBlockingQueue(SIZE, true);
30	+	}
31	+	}
32	+
33	+	public static class NonFair extends BlockingQueueTest {
34	+	protected BlockingQueue emptyCollection() {
35	+	return new ArrayBlockingQueue(SIZE, false);
36	+	}
37	+	}
38	+
39		public static void main(String[] args) {
40	<	junit.textui.TestRunner.run (suite());
40	>	junit.textui.TestRunner.run(suite());
41		}
42	+
43		public static Test suite() {
44	<	return new TestSuite(ArrayBlockingQueueTest.class);
44	>	return newTestSuite(ArrayBlockingQueueTest.class,
45	>	new Fair().testSuite(),
46	>	new NonFair().testSuite());
47		}
48
49		/**
50	<	* Create a queue of given size containing consecutive
50	>	* Returns a new queue of given size containing consecutive
51		* Integers 0 ... n.
52		*/
53	<	private ArrayBlockingQueue populatedQueue(int n) {
54	<	ArrayBlockingQueue q = new ArrayBlockingQueue(n);
53	>	private ArrayBlockingQueue<Integer> populatedQueue(int n) {
54	>	ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<Integer>(n);
55		assertTrue(q.isEmpty());
56	<	for(int i = 0; i < n; i++)
57	<	assertTrue(q.offer(new Integer(i)));
56	>	for (int i = 0; i < n; i++)
57	>	assertTrue(q.offer(new Integer(i)));
58		assertFalse(q.isEmpty());
59		assertEquals(0, q.remainingCapacity());
60	<	assertEquals(n, q.size());
60	>	assertEquals(n, q.size());
61		return q;
62		}
63	<
63	>
64		/**
65		* A new queue has the indicated capacity
66		*/
#	Line 43 | Line 69 | public class ArrayBlockingQueueTest exte
69		}
70
71		/**
72	<	* Constructor throws IAE if  capacity argument nonpositive
72	>	* Constructor throws IAE if capacity argument nonpositive
73		*/
74		public void testConstructor2() {
75		try {
76	<	ArrayBlockingQueue q = new ArrayBlockingQueue(0);
76	>	new ArrayBlockingQueue(0);
77		shouldThrow();
78	<	}
53	<	catch (IllegalArgumentException success) {}
78	>	} catch (IllegalArgumentException success) {}
79		}
80
81		/**
#	Line 58 | Line 83 | public class ArrayBlockingQueueTest exte
83		*/
84		public void testConstructor3() {
85		try {
86	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1, true, null);
86	>	new ArrayBlockingQueue(1, true, null);
87		shouldThrow();
88	<	}
64	<	catch (NullPointerException success) {}
88	>	} catch (NullPointerException success) {}
89		}
90
91		/**
92		* Initializing from Collection of null elements throws NPE
93		*/
94		public void testConstructor4() {
95	+	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
96		try {
97	<	Integer[] ints = new Integer[SIZE];
73	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
97	>	new ArrayBlockingQueue(SIZE, false, elements);
98		shouldThrow();
99	<	}
76	<	catch (NullPointerException success) {}
99	>	} catch (NullPointerException success) {}
100		}
101
102		/**
103		* Initializing from Collection with some null elements throws NPE
104		*/
105		public void testConstructor5() {
106	+	Integer[] ints = new Integer[SIZE];
107	+	for (int i = 0; i < SIZE-1; ++i)
108	+	ints[i] = i;
109	+	Collection<Integer> elements = Arrays.asList(ints);
110		try {
111	<	Integer[] ints = new Integer[SIZE];
85	<	for (int i = 0; i < SIZE-1; ++i)
86	<	ints[i] = new Integer(i);
87	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
111	>	new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
112		shouldThrow();
113	<	}
90	<	catch (NullPointerException success) {}
113	>	} catch (NullPointerException success) {}
114		}
115
116		/**
117		* Initializing from too large collection throws IAE
118		*/
119		public void testConstructor6() {
120	+	Integer[] ints = new Integer[SIZE];
121	+	for (int i = 0; i < SIZE; ++i)
122	+	ints[i] = i;
123	+	Collection<Integer> elements = Arrays.asList(ints);
124		try {
125	<	Integer[] ints = new Integer[SIZE];
99	<	for (int i = 0; i < SIZE; ++i)
100	<	ints[i] = new Integer(i);
101	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1, false, Arrays.asList(ints));
125	>	new ArrayBlockingQueue(SIZE - 1, false, elements);
126		shouldThrow();
127	<	}
104	<	catch (IllegalArgumentException success) {}
127	>	} catch (IllegalArgumentException success) {}
128		}
129
130		/**
131		* Queue contains all elements of collection used to initialize
132		*/
133		public void testConstructor7() {
134	<	try {
135	<	Integer[] ints = new Integer[SIZE];
136	<	for (int i = 0; i < SIZE; ++i)
137	<	ints[i] = new Integer(i);
138	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, true, Arrays.asList(ints));
139	<	for (int i = 0; i < SIZE; ++i)
140	<	assertEquals(ints[i], q.poll());
118	<	}
119	<	finally {}
134	>	Integer[] ints = new Integer[SIZE];
135	>	for (int i = 0; i < SIZE; ++i)
136	>	ints[i] = i;
137	>	Collection<Integer> elements = Arrays.asList(ints);
138	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, true, elements);
139	>	for (int i = 0; i < SIZE; ++i)
140	>	assertEquals(ints[i], q.poll());
141		}
142
143		/**
#	Line 152 | Line 173 | public class ArrayBlockingQueueTest exte
173		}
174
175		/**
155	–	*  offer(null) throws NPE
156	–	*/
157	–	public void testOfferNull() {
158	–	try {
159	–	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
160	–	q.offer(null);
161	–	shouldThrow();
162	–	} catch (NullPointerException success) { }
163	–	}
164	–
165	–	/**
166	–	*  add(null) throws NPE
167	–	*/
168	–	public void testAddNull() {
169	–	try {
170	–	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
171	–	q.add(null);
172	–	shouldThrow();
173	–	} catch (NullPointerException success) { }
174	–	}
175	–
176	–	/**
176		* Offer succeeds if not full; fails if full
177		*/
178		public void testOffer() {
#	Line 186 | Line 185 | public class ArrayBlockingQueueTest exte
185		* add succeeds if not full; throws ISE if full
186		*/
187		public void testAdd() {
188	<	try {
188	>	try {
189		ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
190		for (int i = 0; i < SIZE; ++i) {
191		assertTrue(q.add(new Integer(i)));
192		}
193		assertEquals(0, q.remainingCapacity());
194		q.add(new Integer(SIZE));
196	–	} catch (IllegalStateException success){
197	–	}
198	–	}
199	–
200	–	/**
201	–	*  addAll(null) throws NPE
202	–	*/
203	–	public void testAddAll1() {
204	–	try {
205	–	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
206	–	q.addAll(null);
195		shouldThrow();
196	<	}
209	<	catch (NullPointerException success) {}
196	>	} catch (IllegalStateException success) {}
197		}
198
199		/**
#	Line 217 | Line 204 | public class ArrayBlockingQueueTest exte
204		ArrayBlockingQueue q = populatedQueue(SIZE);
205		q.addAll(q);
206		shouldThrow();
207	<	}
221	<	catch (IllegalArgumentException success) {}
207	>	} catch (IllegalArgumentException success) {}
208		}
209
224	–
225	–	/**
226	–	*  addAll of a collection with null elements throws NPE
227	–	*/
228	–	public void testAddAll2() {
229	–	try {
230	–	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
231	–	Integer[] ints = new Integer[SIZE];
232	–	q.addAll(Arrays.asList(ints));
233	–	shouldThrow();
234	–	}
235	–	catch (NullPointerException success) {}
236	–	}
210		/**
211		* addAll of a collection with any null elements throws NPE after
212		* possibly adding some elements
#	Line 246 | Line 219 | public class ArrayBlockingQueueTest exte
219		ints[i] = new Integer(i);
220		q.addAll(Arrays.asList(ints));
221		shouldThrow();
222	<	}
250	<	catch (NullPointerException success) {}
222	>	} catch (NullPointerException success) {}
223		}
224	+
225		/**
226		* addAll throws ISE if not enough room
227		*/
#	Line 260 | Line 233 | public class ArrayBlockingQueueTest exte
233		ints[i] = new Integer(i);
234		q.addAll(Arrays.asList(ints));
235		shouldThrow();
236	<	}
264	<	catch (IllegalStateException success) {}
236	>	} catch (IllegalStateException success) {}
237		}
238	+
239		/**
240		* Queue contains all elements, in traversal order, of successful addAll
241		*/
242		public void testAddAll5() {
243	<	try {
244	<	Integer[] empty = new Integer[0];
245	<	Integer[] ints = new Integer[SIZE];
246	<	for (int i = 0; i < SIZE; ++i)
247	<	ints[i] = new Integer(i);
248	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
249	<	assertFalse(q.addAll(Arrays.asList(empty)));
250	<	assertTrue(q.addAll(Arrays.asList(ints)));
251	<	for (int i = 0; i < SIZE; ++i)
279	<	assertEquals(ints[i], q.poll());
280	<	}
281	<	finally {}
243	>	Integer[] empty = new Integer[0];
244	>	Integer[] ints = new Integer[SIZE];
245	>	for (int i = 0; i < SIZE; ++i)
246	>	ints[i] = new Integer(i);
247	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
248	>	assertFalse(q.addAll(Arrays.asList(empty)));
249	>	assertTrue(q.addAll(Arrays.asList(ints)));
250	>	for (int i = 0; i < SIZE; ++i)
251	>	assertEquals(ints[i], q.poll());
252		}
253
254		/**
285	–	*  put(null) throws NPE
286	–	*/
287	–	public void testPutNull() {
288	–	try {
289	–	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
290	–	q.put(null);
291	–	shouldThrow();
292	–	}
293	–	catch (NullPointerException success){
294	–	}
295	–	catch (InterruptedException ie) {
296	–	unexpectedException();
297	–	}
298	–	}
299	–
300	–	/**
255		* all elements successfully put are contained
256		*/
257	<	public void testPut() {
258	<	try {
259	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
260	<	for (int i = 0; i < SIZE; ++i) {
261	<	Integer I = new Integer(i);
262	<	q.put(I);
309	<	assertTrue(q.contains(I));
310	<	}
311	<	assertEquals(0, q.remainingCapacity());
312	<	}
313	<	catch (InterruptedException ie) {
314	<	unexpectedException();
257	>	public void testPut() throws InterruptedException {
258	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
259	>	for (int i = 0; i < SIZE; ++i) {
260	>	Integer I = new Integer(i);
261	>	q.put(I);
262	>	assertTrue(q.contains(I));
263		}
264	+	assertEquals(0, q.remainingCapacity());
265		}
266
267		/**
268		* put blocks interruptibly if full
269		*/
270	<	public void testBlockingPut() {
271	<	Thread t = new Thread(new Runnable() {
272	<	public void run() {
273	<	int added = 0;
274	<	try {
275	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
276	<	for (int i = 0; i < SIZE; ++i) {
277	<	q.put(new Integer(i));
278	<	++added;
279	<	}
280	<	q.put(new Integer(SIZE));
281	<	threadShouldThrow();
282	<	} catch (InterruptedException ie){
283	<	threadAssertEquals(added, SIZE);
284	<	}
285	<	}});
286	<	try {
287	<	t.start();
288	<	Thread.sleep(SHORT_DELAY_MS);
289	<	t.interrupt();
290	<	t.join();
291	<	}
292	<	catch (InterruptedException ie) {
293	<	unexpectedException();
294	<	}
270	>	public void testBlockingPut() throws InterruptedException {
271	>	final ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
272	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
273	>	Thread t = newStartedThread(new CheckedRunnable() {
274	>	public void realRun() throws InterruptedException {
275	>	for (int i = 0; i < SIZE; ++i)
276	>	q.put(i);
277	>	assertEquals(SIZE, q.size());
278	>	assertEquals(0, q.remainingCapacity());
279	>
280	>	Thread.currentThread().interrupt();
281	>	try {
282	>	q.put(99);
283	>	shouldThrow();
284	>	} catch (InterruptedException success) {}
285	>	assertFalse(Thread.interrupted());
286	>
287	>	pleaseInterrupt.countDown();
288	>	try {
289	>	q.put(99);
290	>	shouldThrow();
291	>	} catch (InterruptedException success) {}
292	>	assertFalse(Thread.interrupted());
293	>	}});
294	>
295	>	await(pleaseInterrupt);
296	>	assertThreadStaysAlive(t);
297	>	t.interrupt();
298	>	awaitTermination(t);
299	>	assertEquals(SIZE, q.size());
300	>	assertEquals(0, q.remainingCapacity());
301		}
302
303		/**
304	<	* put blocks waiting for take when full
304	>	* put blocks interruptibly waiting for take when full
305		*/
306	<	public void testPutWithTake() {
307	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
308	<	Thread t = new Thread(new Runnable() {
309	<	public void run() {
310	<	int added = 0;
311	<	try {
312	<	q.put(new Object());
313	<	++added;
314	<	q.put(new Object());
315	<	++added;
316	<	q.put(new Object());
317	<	++added;
318	<	q.put(new Object());
319	<	++added;
320	<	threadShouldThrow();
321	<	} catch (InterruptedException e){
322	<	threadAssertTrue(added >= 2);
323	<	}
324	<	}
325	<	});
326	<	try {
327	<	t.start();
328	<	Thread.sleep(SHORT_DELAY_MS);
329	<	q.take();
330	<	t.interrupt();
331	<	t.join();
332	<	} catch (Exception e){
333	<	unexpectedException();
334	<	}
306	>	public void testPutWithTake() throws InterruptedException {
307	>	final int capacity = 2;
308	>	final ArrayBlockingQueue q = new ArrayBlockingQueue(capacity);
309	>	final CountDownLatch pleaseTake = new CountDownLatch(1);
310	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
311	>	Thread t = newStartedThread(new CheckedRunnable() {
312	>	public void realRun() throws InterruptedException {
313	>	for (int i = 0; i < capacity; i++)
314	>	q.put(i);
315	>	pleaseTake.countDown();
316	>	q.put(86);
317	>
318	>	pleaseInterrupt.countDown();
319	>	try {
320	>	q.put(99);
321	>	shouldThrow();
322	>	} catch (InterruptedException success) {}
323	>	assertFalse(Thread.interrupted());
324	>	}});
325	>
326	>	await(pleaseTake);
327	>	assertEquals(0, q.remainingCapacity());
328	>	assertEquals(0, q.take());
329	>
330	>	await(pleaseInterrupt);
331	>	assertThreadStaysAlive(t);
332	>	t.interrupt();
333	>	awaitTermination(t);
334	>	assertEquals(0, q.remainingCapacity());
335		}
336
337		/**
338		* timed offer times out if full and elements not taken
339		*/
340	<	public void testTimedOffer() {
340	>	public void testTimedOffer() throws InterruptedException {
341		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
342	<	Thread t = new Thread(new Runnable() {
343	<	public void run() {
344	<	try {
345	<	q.put(new Object());
346	<	q.put(new Object());
347	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
348	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
349	<	threadShouldThrow();
350	<	} catch (InterruptedException success){}
351	<	}
352	<	});
353	<
354	<	try {
355	<	t.start();
356	<	Thread.sleep(SHORT_DELAY_MS);
357	<	t.interrupt();
358	<	t.join();
359	<	} catch (Exception e){
360	<	unexpectedException();
406	<	}
342	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
343	>	Thread t = newStartedThread(new CheckedRunnable() {
344	>	public void realRun() throws InterruptedException {
345	>	q.put(new Object());
346	>	q.put(new Object());
347	>	long startTime = System.nanoTime();
348	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
349	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
350	>	pleaseInterrupt.countDown();
351	>	try {
352	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
353	>	shouldThrow();
354	>	} catch (InterruptedException success) {}
355	>	}});
356	>
357	>	await(pleaseInterrupt);
358	>	assertThreadStaysAlive(t);
359	>	t.interrupt();
360	>	awaitTermination(t);
361		}
362
363		/**
364		* take retrieves elements in FIFO order
365		*/
366	<	public void testTake() {
367	<	try {
368	<	ArrayBlockingQueue q = populatedQueue(SIZE);
369	<	for (int i = 0; i < SIZE; ++i) {
416	<	assertEquals(i, ((Integer)q.take()).intValue());
417	<	}
418	<	} catch (InterruptedException e){
419	<	unexpectedException();
420	<	}
421	<	}
422	<
423	<	/**
424	<	* take blocks interruptibly when empty
425	<	*/
426	<	public void testTakeFromEmpty() {
427	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
428	<	Thread t = new Thread(new Runnable() {
429	<	public void run() {
430	<	try {
431	<	q.take();
432	<	threadShouldThrow();
433	<	} catch (InterruptedException success){ }
434	<	}
435	<	});
436	<	try {
437	<	t.start();
438	<	Thread.sleep(SHORT_DELAY_MS);
439	<	t.interrupt();
440	<	t.join();
441	<	} catch (Exception e){
442	<	unexpectedException();
366	>	public void testTake() throws InterruptedException {
367	>	ArrayBlockingQueue q = populatedQueue(SIZE);
368	>	for (int i = 0; i < SIZE; ++i) {
369	>	assertEquals(i, q.take());
370		}
371		}
372
373		/**
374		* Take removes existing elements until empty, then blocks interruptibly
375		*/
376	<	public void testBlockingTake() {
377	<	Thread t = new Thread(new Runnable() {
378	<	public void run() {
379	<	try {
380	<	ArrayBlockingQueue q = populatedQueue(SIZE);
381	<	for (int i = 0; i < SIZE; ++i) {
382	<	threadAssertEquals(i, ((Integer)q.take()).intValue());
383	<	}
457	<	q.take();
458	<	threadShouldThrow();
459	<	} catch (InterruptedException success){
460	<	}
461	<	}});
462	<	try {
463	<	t.start();
464	<	Thread.sleep(SHORT_DELAY_MS);
465	<	t.interrupt();
466	<	t.join();
467	<	}
468	<	catch (InterruptedException ie) {
469	<	unexpectedException();
470	<	}
471	<	}
376	>	public void testBlockingTake() throws InterruptedException {
377	>	final ArrayBlockingQueue q = populatedQueue(SIZE);
378	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
379	>	Thread t = newStartedThread(new CheckedRunnable() {
380	>	public void realRun() throws InterruptedException {
381	>	for (int i = 0; i < SIZE; ++i) {
382	>	assertEquals(i, q.take());
383	>	}
384
385	+	Thread.currentThread().interrupt();
386	+	try {
387	+	q.take();
388	+	shouldThrow();
389	+	} catch (InterruptedException success) {}
390	+	assertFalse(Thread.interrupted());
391	+
392	+	pleaseInterrupt.countDown();
393	+	try {
394	+	q.take();
395	+	shouldThrow();
396	+	} catch (InterruptedException success) {}
397	+	assertFalse(Thread.interrupted());
398	+	}});
399	+
400	+	await(pleaseInterrupt);
401	+	assertThreadStaysAlive(t);
402	+	t.interrupt();
403	+	awaitTermination(t);
404	+	}
405
406		/**
407		* poll succeeds unless empty
#	Line 477 | Line 409 | public class ArrayBlockingQueueTest exte
409		public void testPoll() {
410		ArrayBlockingQueue q = populatedQueue(SIZE);
411		for (int i = 0; i < SIZE; ++i) {
412	<	assertEquals(i, ((Integer)q.poll()).intValue());
412	>	assertEquals(i, q.poll());
413		}
414	<	assertNull(q.poll());
414	>	assertNull(q.poll());
415		}
416
417		/**
418	<	* timed pool with zero timeout succeeds when non-empty, else times out
418	>	* timed poll with zero timeout succeeds when non-empty, else times out
419		*/
420	<	public void testTimedPoll0() {
421	<	try {
422	<	ArrayBlockingQueue q = populatedQueue(SIZE);
423	<	for (int i = 0; i < SIZE; ++i) {
424	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
425	<	}
426	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
495	<	} catch (InterruptedException e){
496	<	unexpectedException();
497	<	}
420	>	public void testTimedPoll0() throws InterruptedException {
421	>	ArrayBlockingQueue q = populatedQueue(SIZE);
422	>	for (int i = 0; i < SIZE; ++i) {
423	>	assertEquals(i, q.poll(0, MILLISECONDS));
424	>	}
425	>	assertNull(q.poll(0, MILLISECONDS));
426	>	checkEmpty(q);
427		}
428
429		/**
430	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
430	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
431		*/
432	<	public void testTimedPoll() {
433	<	try {
434	<	ArrayBlockingQueue q = populatedQueue(SIZE);
435	<	for (int i = 0; i < SIZE; ++i) {
436	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
437	<	}
438	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
439	<	} catch (InterruptedException e){
440	<	unexpectedException();
441	<	}
432	>	public void testTimedPoll() throws InterruptedException {
433	>	ArrayBlockingQueue q = populatedQueue(SIZE);
434	>	for (int i = 0; i < SIZE; ++i) {
435	>	long startTime = System.nanoTime();
436	>	assertEquals(i, q.poll(LONG_DELAY_MS, MILLISECONDS));
437	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
438	>	}
439	>	long startTime = System.nanoTime();
440	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
441	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
442	>	checkEmpty(q);
443		}
444
445		/**
446		* Interrupted timed poll throws InterruptedException instead of
447		* returning timeout status
448		*/
449	<	public void testInterruptedTimedPoll() {
450	<	Thread t = new Thread(new Runnable() {
451	<	public void run() {
452	<	try {
453	<	ArrayBlockingQueue q = populatedQueue(SIZE);
454	<	for (int i = 0; i < SIZE; ++i) {
455	<	threadAssertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
456	<	}
457	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
528	<	} catch (InterruptedException success){
529	<	}
530	<	}});
531	<	try {
532	<	t.start();
533	<	Thread.sleep(SHORT_DELAY_MS);
534	<	t.interrupt();
535	<	t.join();
536	<	}
537	<	catch (InterruptedException ie) {
538	<	unexpectedException();
539	<	}
540	<	}
541	<
542	<	/**
543	<	*  timed poll before a delayed offer fails; after offer succeeds;
544	<	*  on interruption throws
545	<	*/
546	<	public void testTimedPollWithOffer() {
547	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
548	<	Thread t = new Thread(new Runnable() {
549	<	public void run() {
550	<	try {
551	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
552	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
553	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
554	<	threadShouldThrow();
555	<	} catch (InterruptedException success) { }
449	>	public void testInterruptedTimedPoll() throws InterruptedException {
450	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
451	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
452	>	Thread t = newStartedThread(new CheckedRunnable() {
453	>	public void realRun() throws InterruptedException {
454	>	for (int i = 0; i < SIZE; ++i) {
455	>	long t0 = System.nanoTime();
456	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
457	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
458		}
459	<	});
460	<	try {
461	<	t.start();
462	<	Thread.sleep(SMALL_DELAY_MS);
463	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
464	<	t.interrupt();
465	<	t.join();
466	<	} catch (Exception e){
467	<	unexpectedException();
468	<	}
469	<	}
470	<
459	>	long t0 = System.nanoTime();
460	>	aboutToWait.countDown();
461	>	try {
462	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
463	>	shouldThrow();
464	>	} catch (InterruptedException success) {
465	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
466	>	}
467	>	}});
468	>
469	>	aboutToWait.await();
470	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
471	>	t.interrupt();
472	>	awaitTermination(t, MEDIUM_DELAY_MS);
473	>	checkEmpty(q);
474	>	}
475
476		/**
477		* peek returns next element, or null if empty
#	Line 573 | Line 479 | public class ArrayBlockingQueueTest exte
479		public void testPeek() {
480		ArrayBlockingQueue q = populatedQueue(SIZE);
481		for (int i = 0; i < SIZE; ++i) {
482	<	assertEquals(i, ((Integer)q.peek()).intValue());
483	<	q.poll();
482	>	assertEquals(i, q.peek());
483	>	assertEquals(i, q.poll());
484		assertTrue(q.peek() == null ||
485	<	i != ((Integer)q.peek()).intValue());
485	>	!q.peek().equals(i));
486		}
487	<	assertNull(q.peek());
487	>	assertNull(q.peek());
488		}
489
490		/**
#	Line 587 | Line 493 | public class ArrayBlockingQueueTest exte
493		public void testElement() {
494		ArrayBlockingQueue q = populatedQueue(SIZE);
495		for (int i = 0; i < SIZE; ++i) {
496	<	assertEquals(i, ((Integer)q.element()).intValue());
497	<	q.poll();
496	>	assertEquals(i, q.element());
497	>	assertEquals(i, q.poll());
498		}
499		try {
500		q.element();
501		shouldThrow();
502	<	}
597	<	catch (NoSuchElementException success) {}
502	>	} catch (NoSuchElementException success) {}
503		}
504
505		/**
#	Line 603 | Line 508 | public class ArrayBlockingQueueTest exte
508		public void testRemove() {
509		ArrayBlockingQueue q = populatedQueue(SIZE);
510		for (int i = 0; i < SIZE; ++i) {
511	<	assertEquals(i, ((Integer)q.remove()).intValue());
511	>	assertEquals(i, q.remove());
512		}
513		try {
514		q.remove();
515		shouldThrow();
516	<	} catch (NoSuchElementException success){
612	<	}
516	>	} catch (NoSuchElementException success) {}
517		}
518
519		/**
616	–	* remove(x) removes x and returns true if present
617	–	*/
618	–	public void testRemoveElement() {
619	–	ArrayBlockingQueue q = populatedQueue(SIZE);
620	–	for (int i = 1; i < SIZE; i+=2) {
621	–	assertTrue(q.remove(new Integer(i)));
622	–	}
623	–	for (int i = 0; i < SIZE; i+=2) {
624	–	assertTrue(q.remove(new Integer(i)));
625	–	assertFalse(q.remove(new Integer(i+1)));
626	–	}
627	–	assertTrue(q.isEmpty());
628	–	}
629	–
630	–	/**
520		* contains(x) reports true when elements added but not yet removed
521		*/
522		public void testContains() {
523		ArrayBlockingQueue q = populatedQueue(SIZE);
524		for (int i = 0; i < SIZE; ++i) {
525		assertTrue(q.contains(new Integer(i)));
526	<	q.poll();
526	>	assertEquals(i, q.poll());
527		assertFalse(q.contains(new Integer(i)));
528		}
529		}
#	Line 650 | Line 539 | public class ArrayBlockingQueueTest exte
539		assertEquals(SIZE, q.remainingCapacity());
540		q.add(one);
541		assertFalse(q.isEmpty());
542	+	assertTrue(q.contains(one));
543		q.clear();
544		assertTrue(q.isEmpty());
545		}
#	Line 703 | Line 593 | public class ArrayBlockingQueueTest exte
593		}
594		}
595
596	+	void checkToArray(ArrayBlockingQueue q) {
597	+	int size = q.size();
598	+	Object[] o = q.toArray();
599	+	assertEquals(size, o.length);
600	+	Iterator it = q.iterator();
601	+	for (int i = 0; i < size; i++) {
602	+	Integer x = (Integer) it.next();
603	+	assertEquals((Integer)o[0] + i, (int) x);
604	+	assertSame(o[i], x);
605	+	}
606	+	}
607	+
608		/**
609	<	*  toArray contains all elements
609	>	* toArray() contains all elements in FIFO order
610		*/
611		public void testToArray() {
612	<	ArrayBlockingQueue q = populatedQueue(SIZE);
613	<	Object[] o = q.toArray();
614	<	try {
615	<	for(int i = 0; i < o.length; i++)
616	<	assertEquals(o[i], q.take());
617	<	} catch (InterruptedException e){
618	<	unexpectedException();
619	<	}
612	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
613	>	for (int i = 0; i < SIZE; i++) {
614	>	checkToArray(q);
615	>	q.add(i);
616	>	}
617	>	// Provoke wraparound
618	>	for (int i = 0; i < SIZE; i++) {
619	>	checkToArray(q);
620	>	assertEquals(i, q.poll());
621	>	checkToArray(q);
622	>	q.add(SIZE+i);
623	>	}
624	>	for (int i = 0; i < SIZE; i++) {
625	>	checkToArray(q);
626	>	assertEquals(SIZE+i, q.poll());
627	>	}
628		}
629
630	<	/**
631	<	* toArray(a) contains all elements
632	<	*/
633	<	public void testToArray2() {
634	<	ArrayBlockingQueue q = populatedQueue(SIZE);
635	<	Integer[] ints = new Integer[SIZE];
636	<	ints = (Integer[])q.toArray(ints);
637	<	try {
638	<	for(int i = 0; i < ints.length; i++)
639	<	assertEquals(ints[i], q.take());
640	<	} catch (InterruptedException e){
641	<	unexpectedException();
642	<	}
630	>	void checkToArray2(ArrayBlockingQueue q) {
631	>	int size = q.size();
632	>	Integer[] a1 = size == 0 ? null : new Integer[size-1];
633	>	Integer[] a2 = new Integer[size];
634	>	Integer[] a3 = new Integer[size+2];
635	>	if (size > 0) Arrays.fill(a1, 42);
636	>	Arrays.fill(a2, 42);
637	>	Arrays.fill(a3, 42);
638	>	Integer[] b1 = size == 0 ? null : (Integer[]) q.toArray(a1);
639	>	Integer[] b2 = (Integer[]) q.toArray(a2);
640	>	Integer[] b3 = (Integer[]) q.toArray(a3);
641	>	assertSame(a2, b2);
642	>	assertSame(a3, b3);
643	>	Iterator it = q.iterator();
644	>	for (int i = 0; i < size; i++) {
645	>	Integer x = (Integer) it.next();
646	>	assertSame(b1[i], x);
647	>	assertEquals(b1[0] + i, (int) x);
648	>	assertSame(b2[i], x);
649	>	assertSame(b3[i], x);
650	>	}
651	>	assertNull(a3[size]);
652	>	assertEquals(42, (int) a3[size+1]);
653	>	if (size > 0) {
654	>	assertNotSame(a1, b1);
655	>	assertEquals(size, b1.length);
656	>	for (int i = 0; i < a1.length; i++) {
657	>	assertEquals(42, (int) a1[i]);
658	>	}
659	>	}
660		}
661
662		/**
663	<	* toArray(null) throws NPE
663	>	* toArray(a) contains all elements in FIFO order
664		*/
665	<	public void testToArray_BadArg() {
666	<	try {
667	<	ArrayBlockingQueue q = populatedQueue(SIZE);
668	<	Object o[] = q.toArray(null);
669	<	shouldThrow();
670	<	} catch(NullPointerException success){}
665	>	public void testToArray2() {
666	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
667	>	for (int i = 0; i < SIZE; i++) {
668	>	checkToArray2(q);
669	>	q.add(i);
670	>	}
671	>	// Provoke wraparound
672	>	for (int i = 0; i < SIZE; i++) {
673	>	checkToArray2(q);
674	>	assertEquals(i, q.poll());
675	>	checkToArray2(q);
676	>	q.add(SIZE+i);
677	>	}
678	>	for (int i = 0; i < SIZE; i++) {
679	>	checkToArray2(q);
680	>	assertEquals(SIZE+i, q.poll());
681	>	}
682		}
683
684		/**
685	<	* toArray with incompatible array type throws CCE
685	>	* toArray(incompatible array type) throws ArrayStoreException
686		*/
687		public void testToArray1_BadArg() {
688	<	try {
689	<	ArrayBlockingQueue q = populatedQueue(SIZE);
690	<	Object o[] = q.toArray(new String[10] );
691	<	shouldThrow();
692	<	} catch(ArrayStoreException  success){}
688	>	ArrayBlockingQueue q = populatedQueue(SIZE);
689	>	try {
690	>	q.toArray(new String[10]);
691	>	shouldThrow();
692	>	} catch (ArrayStoreException success) {}
693		}
694
757	–
695		/**
696		* iterator iterates through all elements
697		*/
698	<	public void testIterator() {
698	>	public void testIterator() throws InterruptedException {
699		ArrayBlockingQueue q = populatedQueue(SIZE);
700	<	Iterator it = q.iterator();
701	<	try {
702	<	while(it.hasNext()){
703	<	assertEquals(it.next(), q.take());
767	<	}
768	<	} catch (InterruptedException e){
769	<	unexpectedException();
770	<	}
700	>	Iterator it = q.iterator();
701	>	while (it.hasNext()) {
702	>	assertEquals(it.next(), q.take());
703	>	}
704		}
705
706		/**
707		* iterator.remove removes current element
708		*/
709	<	public void testIteratorRemove () {
709	>	public void testIteratorRemove() {
710		final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
711		q.add(two);
712		q.add(one);
#	Line 782 | Line 715 | public class ArrayBlockingQueueTest exte
715		Iterator it = q.iterator();
716		it.next();
717		it.remove();
718	<
718	>
719		it = q.iterator();
720	<	assertEquals(it.next(), one);
721	<	assertEquals(it.next(), three);
720	>	assertSame(it.next(), one);
721	>	assertSame(it.next(), three);
722		assertFalse(it.hasNext());
723		}
724
#	Line 802 | Line 735 | public class ArrayBlockingQueueTest exte
735
736		int k = 0;
737		for (Iterator it = q.iterator(); it.hasNext();) {
738	<	int i = ((Integer)(it.next())).intValue();
806	<	assertEquals(++k, i);
738	>	assertEquals(++k, it.next());
739		}
740		assertEquals(3, k);
741		}
#	Line 811 | Line 743 | public class ArrayBlockingQueueTest exte
743		/**
744		* Modifications do not cause iterators to fail
745		*/
746	<	public void testWeaklyConsistentIteration () {
746	>	public void testWeaklyConsistentIteration() {
747		final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
748		q.add(one);
749		q.add(two);
750		q.add(three);
751	<	try {
752	<	for (Iterator it = q.iterator(); it.hasNext();) {
753	<	q.remove();
822	<	it.next();
823	<	}
824	<	}
825	<	catch (ConcurrentModificationException e) {
826	<	unexpectedException();
751	>	for (Iterator it = q.iterator(); it.hasNext();) {
752	>	q.remove();
753	>	it.next();
754		}
755		assertEquals(0, q.size());
756		}
757
831	–
758		/**
759		* toString contains toStrings of elements
760		*/
#	Line 836 | Line 762 | public class ArrayBlockingQueueTest exte
762		ArrayBlockingQueue q = populatedQueue(SIZE);
763		String s = q.toString();
764		for (int i = 0; i < SIZE; ++i) {
765	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
765	>	assertTrue(s.contains(String.valueOf(i)));
766		}
767	<	}
842	<
767	>	}
768
769		/**
770		* offer transfers elements across Executor tasks
#	Line 849 | Line 774 | public class ArrayBlockingQueueTest exte
774		q.add(one);
775		q.add(two);
776		ExecutorService executor = Executors.newFixedThreadPool(2);
777	<	executor.execute(new Runnable() {
778	<	public void run() {
779	<	threadAssertFalse(q.offer(three));
780	<	try {
781	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
782	<	threadAssertEquals(0, q.remainingCapacity());
783	<	}
784	<	catch (InterruptedException e) {
785	<	threadUnexpectedException();
786	<	}
787	<	}
788	<	});
777	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
778	>	executor.execute(new CheckedRunnable() {
779	>	public void realRun() throws InterruptedException {
780	>	assertFalse(q.offer(three));
781	>	threadsStarted.await();
782	>	assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS));
783	>	assertEquals(0, q.remainingCapacity());
784	>	}});
785	>
786	>	executor.execute(new CheckedRunnable() {
787	>	public void realRun() throws InterruptedException {
788	>	threadsStarted.await();
789	>	assertEquals(0, q.remainingCapacity());
790	>	assertSame(one, q.take());
791	>	}});
792
865	–	executor.execute(new Runnable() {
866	–	public void run() {
867	–	try {
868	–	Thread.sleep(SMALL_DELAY_MS);
869	–	threadAssertEquals(one, q.take());
870	–	}
871	–	catch (InterruptedException e) {
872	–	threadUnexpectedException();
873	–	}
874	–	}
875	–	});
876	–
793		joinPool(executor);
878	–
794		}
795
796		/**
797	<	* poll retrieves elements across Executor threads
797	>	* timed poll retrieves elements across Executor threads
798		*/
799		public void testPollInExecutor() {
800		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
801	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
802		ExecutorService executor = Executors.newFixedThreadPool(2);
803	<	executor.execute(new Runnable() {
804	<	public void run() {
805	<	threadAssertNull(q.poll());
806	<	try {
807	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
808	<	threadAssertTrue(q.isEmpty());
809	<	}
810	<	catch (InterruptedException e) {
811	<	threadUnexpectedException();
812	<	}
813	<	}
814	<	});
803	>	executor.execute(new CheckedRunnable() {
804	>	public void realRun() throws InterruptedException {
805	>	assertNull(q.poll());
806	>	threadsStarted.await();
807	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
808	>	checkEmpty(q);
809	>	}});
810	>
811	>	executor.execute(new CheckedRunnable() {
812	>	public void realRun() throws InterruptedException {
813	>	threadsStarted.await();
814	>	q.put(one);
815	>	}});
816
900	–	executor.execute(new Runnable() {
901	–	public void run() {
902	–	try {
903	–	Thread.sleep(SMALL_DELAY_MS);
904	–	q.put(one);
905	–	}
906	–	catch (InterruptedException e) {
907	–	threadUnexpectedException();
908	–	}
909	–	}
910	–	});
911	–
817		joinPool(executor);
818		}
819
820		/**
821		* A deserialized serialized queue has same elements in same order
822		*/
823	<	public void testSerialization() {
824	<	ArrayBlockingQueue q = populatedQueue(SIZE);
825	<
826	<	try {
827	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
828	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
829	<	out.writeObject(q);
830	<	out.close();
831	<
832	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
833	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
929	<	ArrayBlockingQueue r = (ArrayBlockingQueue)in.readObject();
930	<	assertEquals(q.size(), r.size());
931	<	while (!q.isEmpty())
932	<	assertEquals(q.remove(), r.remove());
933	<	} catch(Exception e){
934	<	unexpectedException();
935	<	}
936	<	}
937	<
938	<	/**
939	<	* drainTo(null) throws NPE
940	<	*/
941	<	public void testDrainToNull() {
942	<	ArrayBlockingQueue q = populatedQueue(SIZE);
943	<	try {
944	<	q.drainTo(null);
945	<	shouldThrow();
946	<	} catch(NullPointerException success) {
947	<	}
948	<	}
949	<
950	<	/**
951	<	* drainTo(this) throws IAE
952	<	*/
953	<	public void testDrainToSelf() {
954	<	ArrayBlockingQueue q = populatedQueue(SIZE);
955	<	try {
956	<	q.drainTo(q);
957	<	shouldThrow();
958	<	} catch(IllegalArgumentException success) {
823	>	public void testSerialization() throws Exception {
824	>	Queue x = populatedQueue(SIZE);
825	>	Queue y = serialClone(x);
826	>
827	>	assertNotSame(x, y);
828	>	assertEquals(x.size(), y.size());
829	>	assertEquals(x.toString(), y.toString());
830	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
831	>	while (!x.isEmpty()) {
832	>	assertFalse(y.isEmpty());
833	>	assertEquals(x.remove(), y.remove());
834		}
835	+	assertTrue(y.isEmpty());
836		}
837
838		/**
839		* drainTo(c) empties queue into another collection c
840	<	*/
840	>	*/
841		public void testDrainTo() {
842		ArrayBlockingQueue q = populatedQueue(SIZE);
843		ArrayList l = new ArrayList();
844		q.drainTo(l);
845	<	assertEquals(q.size(), 0);
846	<	assertEquals(l.size(), SIZE);
847	<	for (int i = 0; i < SIZE; ++i)
845	>	assertEquals(0, q.size());
846	>	assertEquals(SIZE, l.size());
847	>	for (int i = 0; i < SIZE; ++i)
848	>	assertEquals(l.get(i), new Integer(i));
849	>	q.add(zero);
850	>	q.add(one);
851	>	assertFalse(q.isEmpty());
852	>	assertTrue(q.contains(zero));
853	>	assertTrue(q.contains(one));
854	>	l.clear();
855	>	q.drainTo(l);
856	>	assertEquals(0, q.size());
857	>	assertEquals(2, l.size());
858	>	for (int i = 0; i < 2; ++i)
859		assertEquals(l.get(i), new Integer(i));
860		}
861
862		/**
863		* drainTo empties full queue, unblocking a waiting put.
864	<	*/
865	<	public void testDrainToWithActivePut() {
864	>	*/
865	>	public void testDrainToWithActivePut() throws InterruptedException {
866		final ArrayBlockingQueue q = populatedQueue(SIZE);
867	<	Thread t = new Thread(new Runnable() {
868	<	public void run() {
869	<	try {
870	<	q.put(new Integer(SIZE+1));
984	<	} catch (InterruptedException ie){
985	<	threadUnexpectedException();
986	<	}
987	<	}
988	<	});
989	<	try {
990	<	t.start();
991	<	ArrayList l = new ArrayList();
992	<	q.drainTo(l);
993	<	assertTrue(l.size() >= SIZE);
994	<	for (int i = 0; i < SIZE; ++i)
995	<	assertEquals(l.get(i), new Integer(i));
996	<	t.join();
997	<	assertTrue(q.size() + l.size() == SIZE+1);
998	<	} catch(Exception e){
999	<	unexpectedException();
1000	<	}
1001	<	}
867	>	Thread t = new Thread(new CheckedRunnable() {
868	>	public void realRun() throws InterruptedException {
869	>	q.put(new Integer(SIZE+1));
870	>	}});
871
872	<	/**
873	<	* drainTo(null, n) throws NPE
874	<	*/
875	<	public void testDrainToNullN() {
876	<	ArrayBlockingQueue q = populatedQueue(SIZE);
877	<	try {
878	<	q.drainTo(null, 0);
879	<	shouldThrow();
1011	<	} catch(NullPointerException success) {
1012	<	}
1013	<	}
1014	<
1015	<	/**
1016	<	* drainTo(this, n) throws IAE
1017	<	*/
1018	<	public void testDrainToSelfN() {
1019	<	ArrayBlockingQueue q = populatedQueue(SIZE);
1020	<	try {
1021	<	q.drainTo(q, 0);
1022	<	shouldThrow();
1023	<	} catch(IllegalArgumentException success) {
1024	<	}
872	>	t.start();
873	>	ArrayList l = new ArrayList();
874	>	q.drainTo(l);
875	>	assertTrue(l.size() >= SIZE);
876	>	for (int i = 0; i < SIZE; ++i)
877	>	assertEquals(l.get(i), new Integer(i));
878	>	t.join();
879	>	assertTrue(q.size() + l.size() >= SIZE);
880		}
881
882		/**
883	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
884	<	*/
883	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
884	>	*/
885		public void testDrainToN() {
886	+	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE*2);
887		for (int i = 0; i < SIZE + 2; ++i) {
888	<	ArrayBlockingQueue q = populatedQueue(SIZE);
888	>	for (int j = 0; j < SIZE; j++)
889	>	assertTrue(q.offer(new Integer(j)));
890		ArrayList l = new ArrayList();
891		q.drainTo(l, i);
892	<	int k = (i < SIZE)? i : SIZE;
893	<	assertEquals(q.size(), SIZE-k);
894	<	assertEquals(l.size(), k);
895	<	for (int j = 0; j < k; ++j)
892	>	int k = (i < SIZE) ? i : SIZE;
893	>	assertEquals(k, l.size());
894	>	assertEquals(SIZE-k, q.size());
895	>	for (int j = 0; j < k; ++j)
896		assertEquals(l.get(j), new Integer(j));
897	+	while (q.poll() != null) ;
898		}
899		}
900
901	+	/**
902	+	* remove(null), contains(null) always return false
903	+	*/
904	+	public void testNeverContainsNull() {
905	+	Collection<?>[] qs = {
906	+	new ArrayBlockingQueue<Object>(10),
907	+	populatedQueue(2),
908	+	};
909
910	+	for (Collection<?> q : qs) {
911	+	assertFalse(q.contains(null));
912	+	assertFalse(q.remove(null));
913	+	}
914	+	}
915		}

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