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root/jsr166/jsr166/src/test/tck/ArrayBlockingQueueTest.java

Comparing jsr166/src/test/tck/ArrayBlockingQueueTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.84 by jsr166, Sat May 13 22:17:12 2017 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	+	import 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.Collections;
15	>	import java.util.Iterator;
16	>	import java.util.NoSuchElementException;
17	>	import java.util.Queue;
18	>	import java.util.concurrent.ArrayBlockingQueue;
19	>	import java.util.concurrent.BlockingQueue;
20	>	import java.util.concurrent.CountDownLatch;
21	>	import java.util.concurrent.Executors;
22	>	import java.util.concurrent.ExecutorService;
23	>	import java.util.concurrent.ThreadLocalRandom;
24	>
25	>	import junit.framework.Test;
26
27		public class ArrayBlockingQueueTest extends JSR166TestCase {
28	+
29		public static void main(String[] args) {
30	<	junit.textui.TestRunner.run (suite());
30	>	main(suite(), args);
31		}
32	+
33		public static Test suite() {
34	<	return new TestSuite(ArrayBlockingQueueTest.class);
34	>	class Implementation implements CollectionImplementation {
35	>	public Class<?> klazz() { return ArrayBlockingQueue.class; }
36	>	public Collection emptyCollection() {
37	>	boolean fair = ThreadLocalRandom.current().nextBoolean();
38	>	return populatedQueue(0, SIZE, 2 * SIZE, fair);
39	>	}
40	>	public Object makeElement(int i) { return i; }
41	>	public boolean isConcurrent() { return true; }
42	>	public boolean permitsNulls() { return false; }
43	>	}
44	>
45	>	return newTestSuite(
46	>	ArrayBlockingQueueTest.class,
47	>	new Fair().testSuite(),
48	>	new NonFair().testSuite(),
49	>	CollectionTest.testSuite(new Implementation()));
50	>	}
51	>
52	>	public static class Fair extends BlockingQueueTest {
53	>	protected BlockingQueue emptyCollection() {
54	>	return populatedQueue(0, SIZE, 2 * SIZE, true);
55	>	}
56	>	}
57	>
58	>	public static class NonFair extends BlockingQueueTest {
59	>	protected BlockingQueue emptyCollection() {
60	>	return populatedQueue(0, SIZE, 2 * SIZE, false);
61	>	}
62	>	}
63	>
64	>	/**
65	>	* Returns a new queue of given size containing consecutive
66	>	* Integers 0 ... n - 1.
67	>	*/
68	>	static ArrayBlockingQueue<Integer> populatedQueue(int n) {
69	>	return populatedQueue(n, n, n, false);
70		}
71
72		/**
73	<	* Create a queue of given size containing consecutive
74	<	* Integers 0 ... n.
73	>	* Returns a new queue of given size containing consecutive
74	>	* Integers 0 ... n - 1, with given capacity range and fairness.
75		*/
76	<	private ArrayBlockingQueue populatedQueue(int n) {
77	<	ArrayBlockingQueue q = new ArrayBlockingQueue(n);
76	>	static ArrayBlockingQueue<Integer> populatedQueue(
77	>	int size, int minCapacity, int maxCapacity, boolean fair) {
78	>	ThreadLocalRandom rnd = ThreadLocalRandom.current();
79	>	int capacity = rnd.nextInt(minCapacity, maxCapacity + 1);
80	>	ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<>(capacity);
81		assertTrue(q.isEmpty());
82	<	for(int i = 0; i < n; i++)
83	<	assertTrue(q.offer(new Integer(i)));
84	<	assertFalse(q.isEmpty());
85	<	assertEquals(0, q.remainingCapacity());
86	<	assertEquals(n, q.size());
82	>	// shuffle circular array elements so they wrap
83	>	{
84	>	int n = rnd.nextInt(capacity);
85	>	for (int i = 0; i < n; i++) q.add(42);
86	>	for (int i = 0; i < n; i++) q.remove();
87	>	}
88	>	for (int i = 0; i < size; i++)
89	>	assertTrue(q.offer((Integer) i));
90	>	assertEquals(size == 0, q.isEmpty());
91	>	assertEquals(capacity - size, q.remainingCapacity());
92	>	assertEquals(size, q.size());
93	>	if (size > 0)
94	>	assertEquals((Integer) 0, q.peek());
95		return q;
96		}
97	<
97	>
98		/**
99	<	*
99	>	* A new queue has the indicated capacity
100		*/
101		public void testConstructor1() {
102		assertEquals(SIZE, new ArrayBlockingQueue(SIZE).remainingCapacity());
103		}
104
105		/**
106	<	*
106	>	* Constructor throws IAE if capacity argument nonpositive
107		*/
108	<	public void testConstructor2() {
109	<	try {
110	<	ArrayBlockingQueue q = new ArrayBlockingQueue(0);
111	<	shouldThrow();
108	>	public void testConstructor_nonPositiveCapacity() {
109	>	for (int i : new int[] { 0, -1, Integer.MIN_VALUE }) {
110	>	try {
111	>	new ArrayBlockingQueue(i);
112	>	shouldThrow();
113	>	} catch (IllegalArgumentException success) {}
114	>	for (boolean fair : new boolean[] { true, false }) {
115	>	try {
116	>	new ArrayBlockingQueue(i, fair);
117	>	shouldThrow();
118	>	} catch (IllegalArgumentException success) {}
119	>	}
120		}
52	–	catch (IllegalArgumentException success) {}
121		}
122
123		/**
124	<	*
124	>	* Initializing from null Collection throws NPE
125		*/
126	<	public void testConstructor3() {
59	<
126	>	public void testConstructor_nullCollection() {
127		try {
128	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1, true, null);
128	>	new ArrayBlockingQueue(1, true, null);
129		shouldThrow();
130	<	}
64	<	catch (NullPointerException success) {}
130	>	} catch (NullPointerException success) {}
131		}
132
133		/**
134	<	*
134	>	* Initializing from Collection of null elements throws NPE
135		*/
136		public void testConstructor4() {
137	+	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
138		try {
139	<	Integer[] ints = new Integer[SIZE];
73	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
139	>	new ArrayBlockingQueue(SIZE, false, elements);
140		shouldThrow();
141	<	}
76	<	catch (NullPointerException success) {}
141	>	} catch (NullPointerException success) {}
142		}
143
144		/**
145	<	*
145	>	* Initializing from Collection with some null elements throws NPE
146		*/
147		public void testConstructor5() {
148	+	Integer[] ints = new Integer[SIZE];
149	+	for (int i = 0; i < SIZE - 1; ++i)
150	+	ints[i] = i;
151	+	Collection<Integer> elements = Arrays.asList(ints);
152		try {
153	<	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));
153	>	new ArrayBlockingQueue(SIZE, false, elements);
154		shouldThrow();
155	<	}
90	<	catch (NullPointerException success) {}
155	>	} catch (NullPointerException success) {}
156		}
157
158		/**
159	<	*
159	>	* Initializing from too large collection throws IAE
160		*/
161	<	public void testConstructor6() {
161	>	public void testConstructor_collectionTooLarge() {
162	>	// just barely fits - succeeds
163	>	new ArrayBlockingQueue(SIZE, false,
164	>	Collections.nCopies(SIZE, ""));
165		try {
166	<	Integer[] ints = new Integer[SIZE];
167	<	for (int i = 0; i < SIZE; ++i)
100	<	ints[i] = new Integer(i);
101	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1, false, Arrays.asList(ints));
166	>	new ArrayBlockingQueue(SIZE - 1, false,
167	>	Collections.nCopies(SIZE, ""));
168		shouldThrow();
169	<	}
104	<	catch (IllegalArgumentException success) {}
169	>	} catch (IllegalArgumentException success) {}
170		}
171
172		/**
173	<	*
173	>	* Queue contains all elements of collection used to initialize
174		*/
175		public void testConstructor7() {
176	<	try {
177	<	Integer[] ints = new Integer[SIZE];
178	<	for (int i = 0; i < SIZE; ++i)
179	<	ints[i] = new Integer(i);
180	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, true, Arrays.asList(ints));
181	<	for (int i = 0; i < SIZE; ++i)
182	<	assertEquals(ints[i], q.poll());
118	<	}
119	<	finally {}
176	>	Integer[] ints = new Integer[SIZE];
177	>	for (int i = 0; i < SIZE; ++i)
178	>	ints[i] = i;
179	>	Collection<Integer> elements = Arrays.asList(ints);
180	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, true, elements);
181	>	for (int i = 0; i < SIZE; ++i)
182	>	assertEquals(ints[i], q.poll());
183		}
184
185		/**
186	<	*
186	>	* Queue transitions from empty to full when elements added
187		*/
188		public void testEmptyFull() {
189	<	ArrayBlockingQueue q = new ArrayBlockingQueue(2);
189	>	BlockingQueue q = populatedQueue(0, 2, 2, false);
190		assertTrue(q.isEmpty());
191		assertEquals(2, q.remainingCapacity());
192		q.add(one);
193		assertFalse(q.isEmpty());
194	<	q.add(two);
194	>	assertTrue(q.offer(two));
195		assertFalse(q.isEmpty());
196		assertEquals(0, q.remainingCapacity());
197		assertFalse(q.offer(three));
198		}
199
200		/**
201	<	*
201	>	* remainingCapacity decreases on add, increases on remove
202		*/
203		public void testRemainingCapacity() {
204	<	ArrayBlockingQueue q = populatedQueue(SIZE);
205	<	for (int i = 0; i < SIZE; ++i) {
206	<	assertEquals(i, q.remainingCapacity());
207	<	assertEquals(SIZE-i, q.size());
208	<	q.remove();
204	>	int size = ThreadLocalRandom.current().nextInt(1, SIZE);
205	>	BlockingQueue q = populatedQueue(size, size, 2 * size, false);
206	>	int spare = q.remainingCapacity();
207	>	int capacity = spare + size;
208	>	for (int i = 0; i < size; i++) {
209	>	assertEquals(spare + i, q.remainingCapacity());
210	>	assertEquals(capacity, q.size() + q.remainingCapacity());
211	>	assertEquals(i, q.remove());
212		}
213	<	for (int i = 0; i < SIZE; ++i) {
214	<	assertEquals(SIZE-i, q.remainingCapacity());
215	<	assertEquals(i, q.size());
216	<	q.add(new Integer(i));
213	>	for (int i = 0; i < size; i++) {
214	>	assertEquals(capacity - i, q.remainingCapacity());
215	>	assertEquals(capacity, q.size() + q.remainingCapacity());
216	>	assertTrue(q.add(i));
217		}
218		}
219
220		/**
221	<	*
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	<	*
221	>	* Offer succeeds if not full; fails if full
222		*/
223		public void testOffer() {
224		ArrayBlockingQueue q = new ArrayBlockingQueue(1);
#	Line 172 | Line 227 | public class ArrayBlockingQueueTest exte
227		}
228
229		/**
230	<	*
230	>	* add succeeds if not full; throws ISE if full
231		*/
232		public void testAdd() {
233	<	try {
234	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
235	<	for (int i = 0; i < SIZE; ++i) {
181	<	assertTrue(q.add(new Integer(i)));
182	<	}
183	<	assertEquals(0, q.remainingCapacity());
184	<	q.add(new Integer(SIZE));
185	<	} catch (IllegalStateException success){
186	<	}
187	<	}
188	<
189	<	/**
190	<	*
191	<	*/
192	<	public void testAddAll1() {
233	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
234	>	for (int i = 0; i < SIZE; i++) assertTrue(q.add((Integer) i));
235	>	assertEquals(0, q.remainingCapacity());
236		try {
237	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
195	<	q.addAll(null);
237	>	q.add((Integer) SIZE);
238		shouldThrow();
239	<	}
198	<	catch (NullPointerException success) {}
239	>	} catch (IllegalStateException success) {}
240		}
241	+
242		/**
243	<	*
243	>	* addAll(this) throws IAE
244		*/
245	<	public void testAddAll2() {
245	>	public void testAddAllSelf() {
246	>	ArrayBlockingQueue q = populatedQueue(SIZE);
247		try {
248	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
206	<	Integer[] ints = new Integer[SIZE];
207	<	q.addAll(Arrays.asList(ints));
248	>	q.addAll(q);
249		shouldThrow();
250	<	}
210	<	catch (NullPointerException success) {}
250	>	} catch (IllegalArgumentException success) {}
251		}
252	+
253		/**
254	<	*
254	>	* addAll of a collection with any null elements throws NPE after
255	>	* possibly adding some elements
256		*/
257		public void testAddAll3() {
258	+	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
259	+	Integer[] ints = new Integer[SIZE];
260	+	for (int i = 0; i < SIZE - 1; ++i)
261	+	ints[i] = new Integer(i);
262		try {
217	–	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
218	–	Integer[] ints = new Integer[SIZE];
219	–	for (int i = 0; i < SIZE-1; ++i)
220	–	ints[i] = new Integer(i);
263		q.addAll(Arrays.asList(ints));
264		shouldThrow();
265	<	}
224	<	catch (NullPointerException success) {}
265	>	} catch (NullPointerException success) {}
266		}
267	+
268		/**
269	<	*
269	>	* addAll throws ISE if not enough room
270		*/
271	<	public void testAddAll4() {
271	>	public void testAddAll_insufficientSpace() {
272	>	int size = ThreadLocalRandom.current().nextInt(1, SIZE);
273	>	ArrayBlockingQueue q = populatedQueue(0, size, size, false);
274	>	// Just fits:
275	>	q.addAll(populatedQueue(size, size, 2 * size, false));
276	>	assertEquals(0, q.remainingCapacity());
277	>	assertEquals(size, q.size());
278	>	assertEquals(0, q.peek());
279		try {
280	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
281	<	Integer[] ints = new Integer[SIZE];
233	<	for (int i = 0; i < SIZE; ++i)
234	<	ints[i] = new Integer(i);
235	<	q.addAll(Arrays.asList(ints));
280	>	q = populatedQueue(0, size, size, false);
281	>	q.addAll(Collections.nCopies(size + 1, 42));
282		shouldThrow();
283	<	}
238	<	catch (IllegalStateException success) {}
283	>	} catch (IllegalStateException success) {}
284		}
285	+
286		/**
287	<	*
287	>	* Queue contains all elements, in traversal order, of successful addAll
288		*/
289		public void testAddAll5() {
290	<	try {
291	<	Integer[] empty = new Integer[0];
292	<	Integer[] ints = new Integer[SIZE];
293	<	for (int i = 0; i < SIZE; ++i)
294	<	ints[i] = new Integer(i);
295	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
296	<	assertFalse(q.addAll(Arrays.asList(empty)));
297	<	assertTrue(q.addAll(Arrays.asList(ints)));
298	<	for (int i = 0; i < SIZE; ++i)
253	<	assertEquals(ints[i], q.poll());
254	<	}
255	<	finally {}
256	<	}
257	<
258	<	/**
259	<	*
260	<	*/
261	<	public void testPutNull() {
262	<	try {
263	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
264	<	q.put(null);
265	<	shouldThrow();
266	<	}
267	<	catch (NullPointerException success){
268	<	}
269	<	catch (InterruptedException ie) {
270	<	unexpectedException();
271	<	}
272	<	}
273	<
274	<	/**
275	<	*
276	<	*/
277	<	public void testPut() {
278	<	try {
279	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
280	<	for (int i = 0; i < SIZE; ++i) {
281	<	Integer I = new Integer(i);
282	<	q.put(I);
283	<	assertTrue(q.contains(I));
284	<	}
285	<	assertEquals(0, q.remainingCapacity());
286	<	}
287	<	catch (InterruptedException ie) {
288	<	unexpectedException();
289	<	}
290	<	}
291	<
292	<	/**
293	<	*
294	<	*/
295	<	public void testBlockingPut() {
296	<	Thread t = new Thread(new Runnable() {
297	<	public void run() {
298	<	int added = 0;
299	<	try {
300	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
301	<	for (int i = 0; i < SIZE; ++i) {
302	<	q.put(new Integer(i));
303	<	++added;
304	<	}
305	<	q.put(new Integer(SIZE));
306	<	threadShouldThrow();
307	<	} catch (InterruptedException ie){
308	<	threadAssertEquals(added, SIZE);
309	<	}
310	<	}});
311	<	try {
312	<	t.start();
313	<	Thread.sleep(SHORT_DELAY_MS);
314	<	t.interrupt();
315	<	t.join();
316	<	}
317	<	catch (InterruptedException ie) {
318	<	unexpectedException();
319	<	}
290	>	Integer[] empty = new Integer[0];
291	>	Integer[] ints = new Integer[SIZE];
292	>	for (int i = 0; i < SIZE; ++i)
293	>	ints[i] = new Integer(i);
294	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
295	>	assertFalse(q.addAll(Arrays.asList(empty)));
296	>	assertTrue(q.addAll(Arrays.asList(ints)));
297	>	for (int i = 0; i < SIZE; ++i)
298	>	assertEquals(ints[i], q.poll());
299		}
300
301		/**
302	<	*
302	>	* all elements successfully put are contained
303		*/
304	<	public void testPutWithTake() {
305	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
306	<	Thread t = new Thread(new Runnable() {
307	<	public void run() {
308	<	int added = 0;
309	<	try {
331	<	q.put(new Object());
332	<	++added;
333	<	q.put(new Object());
334	<	++added;
335	<	q.put(new Object());
336	<	++added;
337	<	q.put(new Object());
338	<	++added;
339	<	threadShouldThrow();
340	<	} catch (InterruptedException e){
341	<	threadAssertTrue(added >= 2);
342	<	}
343	<	}
344	<	});
345	<	try {
346	<	t.start();
347	<	Thread.sleep(SHORT_DELAY_MS);
348	<	q.take();
349	<	t.interrupt();
350	<	t.join();
351	<	} catch (Exception e){
352	<	unexpectedException();
304	>	public void testPut() throws InterruptedException {
305	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
306	>	for (int i = 0; i < SIZE; ++i) {
307	>	Integer x = new Integer(i);
308	>	q.put(x);
309	>	assertTrue(q.contains(x));
310		}
311	+	assertEquals(0, q.remainingCapacity());
312		}
313
314		/**
315	<	*
315	>	* put blocks interruptibly if full
316		*/
317	<	public void testTimedOffer() {
318	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
319	<	Thread t = new Thread(new Runnable() {
320	<	public void run() {
321	<	try {
322	<	q.put(new Object());
323	<	q.put(new Object());
324	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
325	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
326	<	threadShouldThrow();
327	<	} catch (InterruptedException success){}
328	<	}
329	<	});
330	<
331	<	try {
332	<	t.start();
333	<	Thread.sleep(SHORT_DELAY_MS);
334	<	t.interrupt();
335	<	t.join();
336	<	} catch (Exception e){
337	<	unexpectedException();
338	<	}
317	>	public void testBlockingPut() throws InterruptedException {
318	>	final ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
319	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
320	>	Thread t = newStartedThread(new CheckedRunnable() {
321	>	public void realRun() throws InterruptedException {
322	>	for (int i = 0; i < SIZE; ++i)
323	>	q.put(i);
324	>	assertEquals(SIZE, q.size());
325	>	assertEquals(0, q.remainingCapacity());
326	>
327	>	Thread.currentThread().interrupt();
328	>	try {
329	>	q.put(99);
330	>	shouldThrow();
331	>	} catch (InterruptedException success) {}
332	>	assertFalse(Thread.interrupted());
333	>
334	>	pleaseInterrupt.countDown();
335	>	try {
336	>	q.put(99);
337	>	shouldThrow();
338	>	} catch (InterruptedException success) {}
339	>	assertFalse(Thread.interrupted());
340	>	}});
341	>
342	>	await(pleaseInterrupt);
343	>	assertThreadBlocks(t, Thread.State.WAITING);
344	>	t.interrupt();
345	>	awaitTermination(t);
346	>	assertEquals(SIZE, q.size());
347	>	assertEquals(0, q.remainingCapacity());
348		}
349
350		/**
351	<	*
351	>	* put blocks interruptibly waiting for take when full
352		*/
353	<	public void testTake() {
354	<	try {
355	<	ArrayBlockingQueue q = populatedQueue(SIZE);
356	<	for (int i = 0; i < SIZE; ++i) {
357	<	assertEquals(i, ((Integer)q.take()).intValue());
358	<	}
359	<	} catch (InterruptedException e){
360	<	unexpectedException();
361	<	}
353	>	public void testPutWithTake() throws InterruptedException {
354	>	final int capacity = 2;
355	>	final ArrayBlockingQueue q = new ArrayBlockingQueue(capacity);
356	>	final CountDownLatch pleaseTake = new CountDownLatch(1);
357	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
358	>	Thread t = newStartedThread(new CheckedRunnable() {
359	>	public void realRun() throws InterruptedException {
360	>	for (int i = 0; i < capacity; i++)
361	>	q.put(i);
362	>	pleaseTake.countDown();
363	>	q.put(86);
364	>
365	>	pleaseInterrupt.countDown();
366	>	try {
367	>	q.put(99);
368	>	shouldThrow();
369	>	} catch (InterruptedException success) {}
370	>	assertFalse(Thread.interrupted());
371	>	}});
372	>
373	>	await(pleaseTake);
374	>	assertEquals(0, q.remainingCapacity());
375	>	assertEquals(0, q.take());
376	>
377	>	await(pleaseInterrupt);
378	>	assertThreadBlocks(t, Thread.State.WAITING);
379	>	t.interrupt();
380	>	awaitTermination(t);
381	>	assertEquals(0, q.remainingCapacity());
382		}
383
384		/**
385	<	*
385	>	* timed offer times out if full and elements not taken
386		*/
387	<	public void testTakeFromEmpty() {
387	>	public void testTimedOffer() throws InterruptedException {
388		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
389	<	Thread t = new Thread(new Runnable() {
390	<	public void run() {
391	<	try {
392	<	q.take();
393	<	threadShouldThrow();
394	<	} catch (InterruptedException success){ }
395	<	}
396	<	});
397	<	try {
398	<	t.start();
399	<	Thread.sleep(SHORT_DELAY_MS);
400	<	t.interrupt();
401	<	t.join();
402	<	} catch (Exception e){
416	<	unexpectedException();
417	<	}
418	<	}
389	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
390	>	Thread t = newStartedThread(new CheckedRunnable() {
391	>	public void realRun() throws InterruptedException {
392	>	q.put(new Object());
393	>	q.put(new Object());
394	>	long startTime = System.nanoTime();
395	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
396	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
397	>	pleaseInterrupt.countDown();
398	>	try {
399	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
400	>	shouldThrow();
401	>	} catch (InterruptedException success) {}
402	>	}});
403
404	<	/**
405	<	*
406	<	*/
407	<	public void testBlockingTake() {
424	<	Thread t = new Thread(new Runnable() {
425	<	public void run() {
426	<	try {
427	<	ArrayBlockingQueue q = populatedQueue(SIZE);
428	<	for (int i = 0; i < SIZE; ++i) {
429	<	threadAssertEquals(i, ((Integer)q.take()).intValue());
430	<	}
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	<	}
442	<	catch (InterruptedException ie) {
443	<	unexpectedException();
444	<	}
404	>	await(pleaseInterrupt);
405	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
406	>	t.interrupt();
407	>	awaitTermination(t);
408		}
409
447	–
410		/**
411	<	*
411	>	* take retrieves elements in FIFO order
412		*/
413	<	public void testPoll() {
413	>	public void testTake() throws InterruptedException {
414		ArrayBlockingQueue q = populatedQueue(SIZE);
415		for (int i = 0; i < SIZE; ++i) {
416	<	assertEquals(i, ((Integer)q.poll()).intValue());
416	>	assertEquals(i, q.take());
417		}
456	–	assertNull(q.poll());
418		}
419
420		/**
421	<	*
421	>	* Take removes existing elements until empty, then blocks interruptibly
422		*/
423	<	public void testTimedPoll0() {
424	<	try {
425	<	ArrayBlockingQueue q = populatedQueue(SIZE);
426	<	for (int i = 0; i < SIZE; ++i) {
427	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
428	<	}
429	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
430	<	} catch (InterruptedException e){
431	<	unexpectedException();
432	<	}
423	>	public void testBlockingTake() throws InterruptedException {
424	>	final ArrayBlockingQueue q = populatedQueue(SIZE);
425	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
426	>	Thread t = newStartedThread(new CheckedRunnable() {
427	>	public void realRun() throws InterruptedException {
428	>	for (int i = 0; i < SIZE; i++) assertEquals(i, q.take());
429	>
430	>	Thread.currentThread().interrupt();
431	>	try {
432	>	q.take();
433	>	shouldThrow();
434	>	} catch (InterruptedException success) {}
435	>	assertFalse(Thread.interrupted());
436	>
437	>	pleaseInterrupt.countDown();
438	>	try {
439	>	q.take();
440	>	shouldThrow();
441	>	} catch (InterruptedException success) {}
442	>	assertFalse(Thread.interrupted());
443	>	}});
444	>
445	>	await(pleaseInterrupt);
446	>	assertThreadBlocks(t, Thread.State.WAITING);
447	>	t.interrupt();
448	>	awaitTermination(t);
449		}
450
451		/**
452	<	*
452	>	* poll succeeds unless empty
453		*/
454	<	public void testTimedPoll() {
455	<	try {
456	<	ArrayBlockingQueue q = populatedQueue(SIZE);
457	<	for (int i = 0; i < SIZE; ++i) {
458	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
459	<	}
483	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
484	<	} catch (InterruptedException e){
485	<	unexpectedException();
486	<	}
454	>	public void testPoll() {
455	>	ArrayBlockingQueue q = populatedQueue(SIZE);
456	>	for (int i = 0; i < SIZE; ++i) {
457	>	assertEquals(i, q.poll());
458	>	}
459	>	assertNull(q.poll());
460		}
461
462		/**
463	<	*
464	<	*/
465	<	public void testInterruptedTimedPoll() {
466	<	Thread t = new Thread(new Runnable() {
467	<	public void run() {
468	<	try {
496	<	ArrayBlockingQueue q = populatedQueue(SIZE);
497	<	for (int i = 0; i < SIZE; ++i) {
498	<	threadAssertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
499	<	}
500	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
501	<	} catch (InterruptedException success){
502	<	}
503	<	}});
504	<	try {
505	<	t.start();
506	<	Thread.sleep(SHORT_DELAY_MS);
507	<	t.interrupt();
508	<	t.join();
509	<	}
510	<	catch (InterruptedException ie) {
511	<	unexpectedException();
463	>	* timed poll with zero timeout succeeds when non-empty, else times out
464	>	*/
465	>	public void testTimedPoll0() throws InterruptedException {
466	>	ArrayBlockingQueue q = populatedQueue(SIZE);
467	>	for (int i = 0; i < SIZE; ++i) {
468	>	assertEquals(i, q.poll(0, MILLISECONDS));
469		}
470	+	assertNull(q.poll(0, MILLISECONDS));
471	+	checkEmpty(q);
472		}
473
474		/**
475	<	*
475	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
476		*/
477	<	public void testTimedPollWithOffer() {
478	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
479	<	Thread t = new Thread(new Runnable() {
480	<	public void run() {
481	<	try {
482	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
483	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
484	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
485	<	threadShouldThrow();
486	<	} catch (InterruptedException success) { }
477	>	public void testTimedPoll() throws InterruptedException {
478	>	ArrayBlockingQueue q = populatedQueue(SIZE);
479	>	for (int i = 0; i < SIZE; ++i) {
480	>	long startTime = System.nanoTime();
481	>	assertEquals(i, q.poll(LONG_DELAY_MS, MILLISECONDS));
482	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
483	>	}
484	>	long startTime = System.nanoTime();
485	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
486	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
487	>	checkEmpty(q);
488	>	}
489	>
490	>	/**
491	>	* Interrupted timed poll throws InterruptedException instead of
492	>	* returning timeout status
493	>	*/
494	>	public void testInterruptedTimedPoll() throws InterruptedException {
495	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
496	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
497	>	Thread t = newStartedThread(new CheckedRunnable() {
498	>	public void realRun() throws InterruptedException {
499	>	long startTime = System.nanoTime();
500	>	for (int i = 0; i < SIZE; ++i) {
501	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
502		}
503	<	});
504	<	try {
505	<	t.start();
506	<	Thread.sleep(SMALL_DELAY_MS);
507	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
508	<	t.interrupt();
509	<	t.join();
510	<	} catch (Exception e){
537	<	unexpectedException();
538	<	}
539	<	}
503	>	aboutToWait.countDown();
504	>	try {
505	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
506	>	shouldThrow();
507	>	} catch (InterruptedException success) {
508	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
509	>	}
510	>	}});
511
512	+	await(aboutToWait);
513	+	waitForThreadToEnterWaitState(t);
514	+	t.interrupt();
515	+	awaitTermination(t);
516	+	checkEmpty(q);
517	+	}
518
519		/**
520	<	*
520	>	* peek returns next element, or null if empty
521		*/
522		public void testPeek() {
523		ArrayBlockingQueue q = populatedQueue(SIZE);
524		for (int i = 0; i < SIZE; ++i) {
525	<	assertEquals(i, ((Integer)q.peek()).intValue());
526	<	q.poll();
525	>	assertEquals(i, q.peek());
526	>	assertEquals(i, q.poll());
527		assertTrue(q.peek() == null ||
528	<	i != ((Integer)q.peek()).intValue());
528	>	!q.peek().equals(i));
529		}
530	<	assertNull(q.peek());
530	>	assertNull(q.peek());
531		}
532
533		/**
534	<	*
534	>	* element returns next element, or throws NSEE if empty
535		*/
536		public void testElement() {
537		ArrayBlockingQueue q = populatedQueue(SIZE);
538		for (int i = 0; i < SIZE; ++i) {
539	<	assertEquals(i, ((Integer)q.element()).intValue());
540	<	q.poll();
539	>	assertEquals(i, q.element());
540	>	assertEquals(i, q.poll());
541		}
542		try {
543		q.element();
544		shouldThrow();
545	<	}
569	<	catch (NoSuchElementException success) {}
545	>	} catch (NoSuchElementException success) {}
546		}
547
548		/**
549	<	*
549	>	* remove removes next element, or throws NSEE if empty
550		*/
551		public void testRemove() {
552		ArrayBlockingQueue q = populatedQueue(SIZE);
553		for (int i = 0; i < SIZE; ++i) {
554	<	assertEquals(i, ((Integer)q.remove()).intValue());
554	>	assertEquals(i, q.remove());
555		}
556		try {
557		q.remove();
558		shouldThrow();
559	<	} catch (NoSuchElementException success){
584	<	}
559	>	} catch (NoSuchElementException success) {}
560		}
561
562		/**
563	<	*
589	<	*/
590	<	public void testRemoveElement() {
591	<	ArrayBlockingQueue q = populatedQueue(SIZE);
592	<	for (int i = 1; i < SIZE; i+=2) {
593	<	assertTrue(q.remove(new Integer(i)));
594	<	}
595	<	for (int i = 0; i < SIZE; i+=2) {
596	<	assertTrue(q.remove(new Integer(i)));
597	<	assertFalse(q.remove(new Integer(i+1)));
598	<	}
599	<	assertTrue(q.isEmpty());
600	<	}
601	<
602	<	/**
603	<	*
563	>	* contains(x) reports true when elements added but not yet removed
564		*/
565		public void testContains() {
566	<	ArrayBlockingQueue q = populatedQueue(SIZE);
567	<	for (int i = 0; i < SIZE; ++i) {
566	>	int size = ThreadLocalRandom.current().nextInt(1, SIZE);
567	>	ArrayBlockingQueue q = populatedQueue(size, size, 2 * size, false);
568	>	assertFalse(q.contains(null));
569	>	for (int i = 0; i < size; ++i) {
570		assertTrue(q.contains(new Integer(i)));
571	<	q.poll();
571	>	assertEquals(i, q.poll());
572		assertFalse(q.contains(new Integer(i)));
573		}
574		}
575
576		/**
577	<	*
577	>	* clear removes all elements
578		*/
579		public void testClear() {
580	<	ArrayBlockingQueue q = populatedQueue(SIZE);
580	>	int size = ThreadLocalRandom.current().nextInt(1, 5);
581	>	ArrayBlockingQueue q = populatedQueue(size, size, 2 * size, false);
582	>	int capacity = size + q.remainingCapacity();
583		q.clear();
584		assertTrue(q.isEmpty());
585		assertEquals(0, q.size());
586	<	assertEquals(SIZE, q.remainingCapacity());
586	>	assertEquals(capacity, q.remainingCapacity());
587		q.add(one);
588		assertFalse(q.isEmpty());
589	+	assertTrue(q.contains(one));
590		q.clear();
591		assertTrue(q.isEmpty());
592		}
593
594		/**
595	<	*
595	>	* containsAll(c) is true when c contains a subset of elements
596		*/
597		public void testContainsAll() {
598		ArrayBlockingQueue q = populatedQueue(SIZE);
#	Line 641 | Line 606 | public class ArrayBlockingQueueTest exte
606		}
607
608		/**
609	<	*
609	>	* retainAll(c) retains only those elements of c and reports true if changed
610		*/
611		public void testRetainAll() {
612		ArrayBlockingQueue q = populatedQueue(SIZE);
#	Line 654 | Line 619 | public class ArrayBlockingQueueTest exte
619		assertTrue(changed);
620
621		assertTrue(q.containsAll(p));
622	<	assertEquals(SIZE-i, q.size());
622	>	assertEquals(SIZE - i, q.size());
623		p.remove();
624		}
625		}
626
627		/**
628	<	*
628	>	* removeAll(c) removes only those elements of c and reports true if changed
629		*/
630		public void testRemoveAll() {
631		for (int i = 1; i < SIZE; ++i) {
632		ArrayBlockingQueue q = populatedQueue(SIZE);
633		ArrayBlockingQueue p = populatedQueue(i);
634		assertTrue(q.removeAll(p));
635	<	assertEquals(SIZE-i, q.size());
635	>	assertEquals(SIZE - i, q.size());
636		for (int j = 0; j < i; ++j) {
637	<	Integer I = (Integer)(p.remove());
638	<	assertFalse(q.contains(I));
637	>	Integer x = (Integer)(p.remove());
638	>	assertFalse(q.contains(x));
639		}
640		}
641		}
642
643	+	void checkToArray(ArrayBlockingQueue<Integer> q) {
644	+	int size = q.size();
645	+	Object[] a1 = q.toArray();
646	+	assertEquals(size, a1.length);
647	+	Integer[] a2 = q.toArray(new Integer[0]);
648	+	assertEquals(size, a2.length);
649	+	Integer[] a3 = q.toArray(new Integer[Math.max(0, size - 1)]);
650	+	assertEquals(size, a3.length);
651	+	Integer[] a4 = new Integer[size];
652	+	assertSame(a4, q.toArray(a4));
653	+	Integer[] a5 = new Integer[size + 1];
654	+	Arrays.fill(a5, 42);
655	+	assertSame(a5, q.toArray(a5));
656	+	Integer[] a6 = new Integer[size + 2];
657	+	Arrays.fill(a6, 42);
658	+	assertSame(a6, q.toArray(a6));
659	+	Object[][] as = { a1, a2, a3, a4, a5, a6 };
660	+	for (Object[] a : as) {
661	+	if (a.length > size) assertNull(a[size]);
662	+	if (a.length > size + 1) assertEquals(42, a[size + 1]);
663	+	}
664	+	Iterator it = q.iterator();
665	+	Integer s = q.peek();
666	+	for (int i = 0; i < size; i++) {
667	+	Integer x = (Integer) it.next();
668	+	assertEquals(s + i, (int) x);
669	+	for (Object[] a : as)
670	+	assertSame(a1[i], x);
671	+	}
672	+	}
673
674		/**
675	<	*
675	>	* toArray() and toArray(a) contain all elements in FIFO order
676		*/
677		public void testToArray() {
678	<	ArrayBlockingQueue q = populatedQueue(SIZE);
679	<	Object[] o = q.toArray();
680	<	try {
681	<	for(int i = 0; i < o.length; i++)
682	<	assertEquals(o[i], q.take());
683	<	} catch (InterruptedException e){
684	<	unexpectedException();
685	<	}
678	>	final ThreadLocalRandom rnd = ThreadLocalRandom.current();
679	>	final int size = rnd.nextInt(6);
680	>	final int capacity = Math.max(1, size + rnd.nextInt(size + 1));
681	>	ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<>(capacity);
682	>	for (int i = 0; i < size; i++) {
683	>	checkToArray(q);
684	>	q.add(i);
685	>	}
686	>	// Provoke wraparound
687	>	int added = size * 2;
688	>	for (int i = 0; i < added; i++) {
689	>	checkToArray(q);
690	>	assertEquals((Integer) i, q.poll());
691	>	q.add(size + i);
692	>	}
693	>	for (int i = 0; i < size; i++) {
694	>	checkToArray(q);
695	>	assertEquals((Integer) (added + i), q.poll());
696	>	}
697		}
698
699		/**
700	<	*
700	>	* toArray(incompatible array type) throws ArrayStoreException
701		*/
702	<	public void testToArray2() {
702	>	public void testToArray_incompatibleArrayType() {
703		ArrayBlockingQueue q = populatedQueue(SIZE);
704	<	Integer[] ints = new Integer[SIZE];
705	<	ints = (Integer[])q.toArray(ints);
706	<	try {
707	<	for(int i = 0; i < ints.length; i++)
708	<	assertEquals(ints[i], q.take());
709	<	} catch (InterruptedException e){
710	<	unexpectedException();
711	<	}
704	>	try {
705	>	q.toArray(new String[10]);
706	>	shouldThrow();
707	>	} catch (ArrayStoreException success) {}
708	>	try {
709	>	q.toArray(new String[0]);
710	>	shouldThrow();
711	>	} catch (ArrayStoreException success) {}
712		}
713	<
713	>
714		/**
715	<	*
715	>	* iterator iterates through all elements
716		*/
717	<	public void testIterator() {
717	>	public void testIterator() throws InterruptedException {
718		ArrayBlockingQueue q = populatedQueue(SIZE);
719	<	Iterator it = q.iterator();
720	<	try {
721	<	while(it.hasNext()){
722	<	assertEquals(it.next(), q.take());
723	<	}
724	<	} catch (InterruptedException e){
725	<	unexpectedException();
726	<	}
719	>	Iterator it = q.iterator();
720	>	int i;
721	>	for (i = 0; it.hasNext(); i++)
722	>	assertTrue(q.contains(it.next()));
723	>	assertEquals(i, SIZE);
724	>	assertIteratorExhausted(it);
725	>
726	>	it = q.iterator();
727	>	for (i = 0; it.hasNext(); i++)
728	>	assertEquals(it.next(), q.take());
729	>	assertEquals(i, SIZE);
730	>	assertIteratorExhausted(it);
731	>	}
732	>
733	>	/**
734	>	* iterator of empty collection has no elements
735	>	*/
736	>	public void testEmptyIterator() {
737	>	assertIteratorExhausted(new ArrayBlockingQueue(SIZE).iterator());
738	>	}
739	>
740	>	/**
741	>	* iterator.remove removes current element
742	>	*/
743	>	public void testIteratorRemove() {
744	>	final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
745	>	q.add(two);
746	>	q.add(one);
747	>	q.add(three);
748	>
749	>	Iterator it = q.iterator();
750	>	it.next();
751	>	it.remove();
752	>
753	>	it = q.iterator();
754	>	assertSame(it.next(), one);
755	>	assertSame(it.next(), three);
756	>	assertFalse(it.hasNext());
757		}
758
759		/**
760	<	*
760	>	* iterator ordering is FIFO
761		*/
762		public void testIteratorOrdering() {
763		final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
#	Line 733 | Line 769 | public class ArrayBlockingQueueTest exte
769
770		int k = 0;
771		for (Iterator it = q.iterator(); it.hasNext();) {
772	<	int i = ((Integer)(it.next())).intValue();
737	<	assertEquals(++k, i);
772	>	assertEquals(++k, it.next());
773		}
774		assertEquals(3, k);
775		}
776
777		/**
778	<	*
778	>	* Modifications do not cause iterators to fail
779		*/
780	<	public void testWeaklyConsistentIteration () {
780	>	public void testWeaklyConsistentIteration() {
781		final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
782		q.add(one);
783		q.add(two);
784		q.add(three);
785	<	try {
786	<	for (Iterator it = q.iterator(); it.hasNext();) {
787	<	q.remove();
753	<	it.next();
754	<	}
755	<	}
756	<	catch (ConcurrentModificationException e) {
757	<	unexpectedException();
785	>	for (Iterator it = q.iterator(); it.hasNext();) {
786	>	q.remove();
787	>	it.next();
788		}
759	–
789		assertEquals(0, q.size());
790		}
791
763	–
792		/**
793	<	*
793	>	* toString contains toStrings of elements
794		*/
795		public void testToString() {
796		ArrayBlockingQueue q = populatedQueue(SIZE);
797		String s = q.toString();
798		for (int i = 0; i < SIZE; ++i) {
799	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
799	>	assertTrue(s.contains(String.valueOf(i)));
800		}
801	<	}
774	<
801	>	}
802
803		/**
804	<	*
804	>	* offer transfers elements across Executor tasks
805		*/
806		public void testOfferInExecutor() {
780	–
807		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
782	–
808		q.add(one);
809		q.add(two);
810	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
811	+	final ExecutorService executor = Executors.newFixedThreadPool(2);
812	+	try (PoolCleaner cleaner = cleaner(executor)) {
813	+	executor.execute(new CheckedRunnable() {
814	+	public void realRun() throws InterruptedException {
815	+	assertFalse(q.offer(three));
816	+	threadsStarted.await();
817	+	assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS));
818	+	assertEquals(0, q.remainingCapacity());
819	+	}});
820
821	<	ExecutorService executor = Executors.newFixedThreadPool(2);
822	<
823	<	executor.execute(new Runnable() {
824	<	public void run() {
825	<	threadAssertFalse(q.offer(three));
826	<	try {
827	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
793	<	threadAssertEquals(0, q.remainingCapacity());
794	<	}
795	<	catch (InterruptedException e) {
796	<	threadUnexpectedException();
797	<	}
798	<	}
799	<	});
800	<
801	<	executor.execute(new Runnable() {
802	<	public void run() {
803	<	try {
804	<	Thread.sleep(SMALL_DELAY_MS);
805	<	threadAssertEquals(one, q.take());
806	<	}
807	<	catch (InterruptedException e) {
808	<	threadUnexpectedException();
809	<	}
810	<	}
811	<	});
812	<
813	<	joinPool(executor);
814	<
821	>	executor.execute(new CheckedRunnable() {
822	>	public void realRun() throws InterruptedException {
823	>	threadsStarted.await();
824	>	assertEquals(0, q.remainingCapacity());
825	>	assertSame(one, q.take());
826	>	}});
827	>	}
828		}
829
830		/**
831	<	*
831	>	* timed poll retrieves elements across Executor threads
832		*/
833		public void testPollInExecutor() {
821	–
834		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
835	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
836	+	final ExecutorService executor = Executors.newFixedThreadPool(2);
837	+	try (PoolCleaner cleaner = cleaner(executor)) {
838	+	executor.execute(new CheckedRunnable() {
839	+	public void realRun() throws InterruptedException {
840	+	assertNull(q.poll());
841	+	threadsStarted.await();
842	+	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
843	+	checkEmpty(q);
844	+	}});
845
846	<	ExecutorService executor = Executors.newFixedThreadPool(2);
847	<
848	<	executor.execute(new Runnable() {
827	<	public void run() {
828	<	threadAssertNull(q.poll());
829	<	try {
830	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
831	<	threadAssertTrue(q.isEmpty());
832	<	}
833	<	catch (InterruptedException e) {
834	<	threadUnexpectedException();
835	<	}
836	<	}
837	<	});
838	<
839	<	executor.execute(new Runnable() {
840	<	public void run() {
841	<	try {
842	<	Thread.sleep(SMALL_DELAY_MS);
846	>	executor.execute(new CheckedRunnable() {
847	>	public void realRun() throws InterruptedException {
848	>	threadsStarted.await();
849		q.put(one);
850	<	}
851	<	catch (InterruptedException e) {
852	<	threadUnexpectedException();
847	<	}
848	<	}
849	<	});
850	<
851	<	joinPool(executor);
850	>	}});
851	>	}
852	>	}
853
854	+	/**
855	+	* A deserialized serialized queue has same elements in same order
856	+	*/
857	+	public void testSerialization() throws Exception {
858	+	Queue x = populatedQueue(SIZE);
859	+	Queue y = serialClone(x);
860	+
861	+	assertNotSame(x, y);
862	+	assertEquals(x.size(), y.size());
863	+	assertEquals(x.toString(), y.toString());
864	+	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
865	+	while (!x.isEmpty()) {
866	+	assertFalse(y.isEmpty());
867	+	assertEquals(x.remove(), y.remove());
868	+	}
869	+	assertTrue(y.isEmpty());
870		}
871
872		/**
873	<	*
873	>	* drainTo(c) empties queue into another collection c
874		*/
875	<	public void testSerialization() {
875	>	public void testDrainTo() {
876		ArrayBlockingQueue q = populatedQueue(SIZE);
877	+	ArrayList l = new ArrayList();
878	+	q.drainTo(l);
879	+	assertEquals(0, q.size());
880	+	assertEquals(SIZE, l.size());
881	+	for (int i = 0; i < SIZE; ++i)
882	+	assertEquals(l.get(i), new Integer(i));
883	+	q.add(zero);
884	+	q.add(one);
885	+	assertFalse(q.isEmpty());
886	+	assertTrue(q.contains(zero));
887	+	assertTrue(q.contains(one));
888	+	l.clear();
889	+	q.drainTo(l);
890	+	assertEquals(0, q.size());
891	+	assertEquals(2, l.size());
892	+	for (int i = 0; i < 2; ++i)
893	+	assertEquals(l.get(i), new Integer(i));
894	+	}
895
896	<	try {
897	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
898	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
899	<	out.writeObject(q);
900	<	out.close();
896	>	/**
897	>	* drainTo empties full queue, unblocking a waiting put.
898	>	*/
899	>	public void testDrainToWithActivePut() throws InterruptedException {
900	>	final ArrayBlockingQueue q = populatedQueue(SIZE);
901	>	Thread t = new Thread(new CheckedRunnable() {
902	>	public void realRun() throws InterruptedException {
903	>	q.put(new Integer(SIZE + 1));
904	>	}});
905	>
906	>	t.start();
907	>	ArrayList l = new ArrayList();
908	>	q.drainTo(l);
909	>	assertTrue(l.size() >= SIZE);
910	>	for (int i = 0; i < SIZE; ++i)
911	>	assertEquals(l.get(i), new Integer(i));
912	>	t.join();
913	>	assertTrue(q.size() + l.size() >= SIZE);
914	>	}
915
916	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
917	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
918	<	ArrayBlockingQueue r = (ArrayBlockingQueue)in.readObject();
919	<	assertEquals(q.size(), r.size());
920	<	while (!q.isEmpty())
921	<	assertEquals(q.remove(), r.remove());
922	<	} catch(Exception e){
923	<	unexpectedException();
916	>	/**
917	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
918	>	*/
919	>	public void testDrainToN() {
920	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE * 2);
921	>	for (int i = 0; i < SIZE + 2; ++i) {
922	>	for (int j = 0; j < SIZE; j++)
923	>	assertTrue(q.offer(new Integer(j)));
924	>	ArrayList l = new ArrayList();
925	>	q.drainTo(l, i);
926	>	int k = (i < SIZE) ? i : SIZE;
927	>	assertEquals(k, l.size());
928	>	assertEquals(SIZE - k, q.size());
929	>	for (int j = 0; j < k; ++j)
930	>	assertEquals(l.get(j), new Integer(j));
931	>	do {} while (q.poll() != null);
932		}
933		}
934
935	+	/**
936	+	* remove(null), contains(null) always return false
937	+	*/
938	+	public void testNeverContainsNull() {
939	+	Collection<?>[] qs = {
940	+	populatedQueue(0, 1, 10, false),
941	+	populatedQueue(2, 2, 10, true),
942	+	};
943
944	+	for (Collection<?> q : qs) {
945	+	assertFalse(q.contains(null));
946	+	assertFalse(q.remove(null));
947	+	}
948	+	}
949		}

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