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Comparing jsr166/src/test/tck/ArrayBlockingQueueTest.java (file contents):
Revision 1.5 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.93 by jsr166, Sun Aug 11 22:29:26 2019 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		* A new queue has the indicated capacity
100		*/
#	Line 42 | Line 103 | public class ArrayBlockingQueueTest exte
103		}
104
105		/**
106	<	* Constructor throws IAE if  capacity argument nonpositive
106	>	* Constructor throws IllegalArgumentException 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		* Initializing from null Collection throws NPE
125		*/
126	<	public void testConstructor3() {
126	>	public void testConstructor_nullCollection() {
127		try {
128	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1, true, null);
128	>	new ArrayBlockingQueue(1, true, null);
129		shouldThrow();
130	<	}
63	<	catch (NullPointerException success) {}
130	>	} catch (NullPointerException success) {}
131		}
132
133		/**
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];
72	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
139	>	new ArrayBlockingQueue(SIZE, false, elements);
140		shouldThrow();
141	<	}
75	<	catch (NullPointerException success) {}
141	>	} catch (NullPointerException success) {}
142		}
143
144		/**
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];
84	<	for (int i = 0; i < SIZE-1; ++i)
85	<	ints[i] = new Integer(i);
86	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
153	>	new ArrayBlockingQueue(SIZE, false, elements);
154		shouldThrow();
155	<	}
89	<	catch (NullPointerException success) {}
155	>	} catch (NullPointerException success) {}
156		}
157
158		/**
159	<	* Initializing from too large collection throws IAE
159	>	* Initializing from too large collection throws IllegalArgumentException
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)
99	<	ints[i] = new Integer(i);
100	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1, false, Arrays.asList(ints));
166	>	new ArrayBlockingQueue(SIZE - 1, false,
167	>	Collections.nCopies(SIZE, ""));
168		shouldThrow();
169	<	}
103	<	catch (IllegalArgumentException success) {}
169	>	} catch (IllegalArgumentException success) {}
170		}
171
172		/**
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());
117	<	}
118	<	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		* 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));
#	Line 137 | Line 201 | public class ArrayBlockingQueueTest exte
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();
209	<	}
210	<	for (int i = 0; i < SIZE; ++i) {
211	<	assertEquals(SIZE-i, q.remainingCapacity());
212	<	assertEquals(i, q.size());
213	<	q.add(new Integer(i));
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(capacity - i, q.remainingCapacity());
215	>	assertEquals(capacity, q.size() + q.remainingCapacity());
216	>	assertTrue(q.add(i));
217		}
218		}
219
220		/**
154	–	*  offer(null) throws NPE
155	–	*/
156	–	public void testOfferNull() {
157	–	try {
158	–	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
159	–	q.offer(null);
160	–	shouldThrow();
161	–	} catch (NullPointerException success) { }
162	–	}
163	–
164	–	/**
221		* Offer succeeds if not full; fails if full
222		*/
223		public void testOffer() {
#	Line 171 | Line 227 | public class ArrayBlockingQueueTest exte
227		}
228
229		/**
230	<	* add succeeds if not full; throws ISE if full
230	>	* add succeeds if not full; throws IllegalStateException if full
231		*/
232		public void testAdd() {
233	<	try {
234	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
235	<	for (int i = 0; i < SIZE; ++i) {
180	<	assertTrue(q.add(new Integer(i)));
181	<	}
182	<	assertEquals(0, q.remainingCapacity());
183	<	q.add(new Integer(SIZE));
184	<	} catch (IllegalStateException success){
185	<	}
186	<	}
187	<
188	<	/**
189	<	*  addAll(null) throws NPE
190	<	*/
191	<	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);
194	<	q.addAll(null);
237	>	q.add((Integer) SIZE);
238		shouldThrow();
239	<	}
197	<	catch (NullPointerException success) {}
239	>	} catch (IllegalStateException success) {}
240		}
241	+
242		/**
243	<	*  addAll of a collection with null elements throws NPE
243	>	* addAll(this) throws IllegalArgumentException
244		*/
245	<	public void testAddAll2() {
245	>	public void testAddAllSelf() {
246	>	ArrayBlockingQueue q = populatedQueue(SIZE);
247		try {
248	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
205	<	Integer[] ints = new Integer[SIZE];
206	<	q.addAll(Arrays.asList(ints));
248	>	q.addAll(q);
249		shouldThrow();
250	<	}
209	<	catch (NullPointerException success) {}
250	>	} catch (IllegalArgumentException success) {}
251		}
252	+
253		/**
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	<	* addAll throws ISE if not enough room
269	>	* addAll throws IllegalStateException 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		* 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 {}
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		/**
259	–	*  put(null) throws NPE
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	–	/**
302		* all elements successfully put are contained
303		*/
304	<	public void testPut() {
305	<	try {
306	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
307	<	for (int i = 0; i < SIZE; ++i) {
308	<	Integer I = new Integer(i);
309	<	q.put(I);
283	<	assertTrue(q.contains(I));
284	<	}
285	<	assertEquals(0, q.remainingCapacity());
286	<	}
287	<	catch (InterruptedException ie) {
288	<	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		* put blocks interruptibly if full
316		*/
317	<	public void testBlockingPut() {
318	<	Thread t = new Thread(new Runnable() {
319	<	public void run() {
320	<	int added = 0;
321	<	try {
322	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
323	<	for (int i = 0; i < SIZE; ++i) {
324	<	q.put(new Integer(i));
325	<	++added;
326	<	}
327	<	q.put(new Integer(SIZE));
328	<	threadShouldThrow();
329	<	} catch (InterruptedException ie){
330	<	threadAssertEquals(added, SIZE);
331	<	}
332	<	}});
333	<	try {
334	<	t.start();
335	<	Thread.sleep(SHORT_DELAY_MS);
336	<	t.interrupt();
337	<	t.join();
338	<	}
339	<	catch (InterruptedException ie) {
340	<	unexpectedException();
341	<	}
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	>	if (randomBoolean()) 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	<	* put blocks waiting for take when full
351	>	* put blocks interruptibly waiting for take when full
352		*/
353	<	public void testPutWithTake() {
354	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
355	<	Thread t = new Thread(new Runnable() {
356	<	public void run() {
357	<	int added = 0;
358	<	try {
359	<	q.put(new Object());
360	<	++added;
361	<	q.put(new Object());
362	<	++added;
363	<	q.put(new Object());
364	<	++added;
365	<	q.put(new Object());
366	<	++added;
367	<	threadShouldThrow();
368	<	} catch (InterruptedException e){
369	<	threadAssertTrue(added >= 2);
370	<	}
371	<	}
372	<	});
373	<	try {
374	<	t.start();
375	<	Thread.sleep(SHORT_DELAY_MS);
376	<	q.take();
377	<	t.interrupt();
378	<	t.join();
379	<	} catch (Exception e){
380	<	unexpectedException();
381	<	}
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	>	Thread.currentThread().interrupt();
366	>	try {
367	>	q.put(99);
368	>	shouldThrow();
369	>	} catch (InterruptedException success) {}
370	>	assertFalse(Thread.interrupted());
371	>
372	>	pleaseInterrupt.countDown();
373	>	try {
374	>	q.put(99);
375	>	shouldThrow();
376	>	} catch (InterruptedException success) {}
377	>	assertFalse(Thread.interrupted());
378	>	}});
379	>
380	>	await(pleaseTake);
381	>	assertEquals(0, q.remainingCapacity());
382	>	assertEquals(0, q.take());
383	>
384	>	await(pleaseInterrupt);
385	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
386	>	t.interrupt();
387	>	awaitTermination(t);
388	>	assertEquals(0, q.remainingCapacity());
389		}
390
391		/**
#	Line 358 | Line 393 | public class ArrayBlockingQueueTest exte
393		*/
394		public void testTimedOffer() {
395		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
396	<	Thread t = new Thread(new Runnable() {
397	<	public void run() {
398	<	try {
399	<	q.put(new Object());
400	<	q.put(new Object());
401	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
402	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
403	<	threadShouldThrow();
369	<	} catch (InterruptedException success){}
370	<	}
371	<	});
372	<
373	<	try {
374	<	t.start();
375	<	Thread.sleep(SHORT_DELAY_MS);
376	<	t.interrupt();
377	<	t.join();
378	<	} catch (Exception e){
379	<	unexpectedException();
380	<	}
381	<	}
396	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
397	>	Thread t = newStartedThread(new CheckedRunnable() {
398	>	public void realRun() throws InterruptedException {
399	>	q.put(new Object());
400	>	q.put(new Object());
401	>	long startTime = System.nanoTime();
402	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
403	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
404
405	<	/**
406	<	* take retrieves elements in FIFO order
407	<	*/
408	<	public void testTake() {
409	<	try {
410	<	ArrayBlockingQueue q = populatedQueue(SIZE);
411	<	for (int i = 0; i < SIZE; ++i) {
412	<	assertEquals(i, ((Integer)q.take()).intValue());
413	<	}
414	<	} catch (InterruptedException e){
415	<	unexpectedException();
416	<	}
405	>	Thread.currentThread().interrupt();
406	>	try {
407	>	q.offer(new Object(), randomTimeout(), randomTimeUnit());
408	>	shouldThrow();
409	>	} catch (InterruptedException success) {}
410	>	assertFalse(Thread.interrupted());
411	>
412	>	pleaseInterrupt.countDown();
413	>	try {
414	>	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
415	>	shouldThrow();
416	>	} catch (InterruptedException success) {}
417	>	assertFalse(Thread.interrupted());
418	>
419	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
420	>	}});
421	>
422	>	await(pleaseInterrupt);
423	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
424	>	t.interrupt();
425	>	awaitTermination(t);
426		}
427
428		/**
429	<	* take blocks interruptibly when empty
429	>	* take retrieves elements in FIFO order
430		*/
431	<	public void testTakeFromEmpty() {
432	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
433	<	Thread t = new Thread(new Runnable() {
434	<	public void run() {
404	<	try {
405	<	q.take();
406	<	threadShouldThrow();
407	<	} catch (InterruptedException success){ }
408	<	}
409	<	});
410	<	try {
411	<	t.start();
412	<	Thread.sleep(SHORT_DELAY_MS);
413	<	t.interrupt();
414	<	t.join();
415	<	} catch (Exception e){
416	<	unexpectedException();
431	>	public void testTake() throws InterruptedException {
432	>	ArrayBlockingQueue q = populatedQueue(SIZE);
433	>	for (int i = 0; i < SIZE; ++i) {
434	>	assertEquals(i, q.take());
435		}
436		}
437
438		/**
439		* Take removes existing elements until empty, then blocks interruptibly
440		*/
441	<	public void testBlockingTake() {
442	<	Thread t = new Thread(new Runnable() {
443	<	public void run() {
444	<	try {
445	<	ArrayBlockingQueue q = populatedQueue(SIZE);
446	<	for (int i = 0; i < SIZE; ++i) {
447	<	threadAssertEquals(i, ((Integer)q.take()).intValue());
448	<	}
449	<	q.take();
450	<	threadShouldThrow();
451	<	} catch (InterruptedException success){
452	<	}
453	<	}});
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	<	}
445	<	}
441	>	public void testBlockingTake() throws InterruptedException {
442	>	final ArrayBlockingQueue q = populatedQueue(SIZE);
443	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
444	>	Thread t = newStartedThread(new CheckedRunnable() {
445	>	public void realRun() throws InterruptedException {
446	>	for (int i = 0; i < SIZE; i++) assertEquals(i, q.take());
447	>
448	>	Thread.currentThread().interrupt();
449	>	try {
450	>	q.take();
451	>	shouldThrow();
452	>	} catch (InterruptedException success) {}
453	>	assertFalse(Thread.interrupted());
454
455	+	pleaseInterrupt.countDown();
456	+	try {
457	+	q.take();
458	+	shouldThrow();
459	+	} catch (InterruptedException success) {}
460	+	assertFalse(Thread.interrupted());
461	+	}});
462	+
463	+	await(pleaseInterrupt);
464	+	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
465	+	t.interrupt();
466	+	awaitTermination(t);
467	+	}
468
469		/**
470		* poll succeeds unless empty
#	Line 451 | Line 472 | public class ArrayBlockingQueueTest exte
472		public void testPoll() {
473		ArrayBlockingQueue q = populatedQueue(SIZE);
474		for (int i = 0; i < SIZE; ++i) {
475	<	assertEquals(i, ((Integer)q.poll()).intValue());
475	>	assertEquals(i, q.poll());
476		}
477	<	assertNull(q.poll());
477	>	assertNull(q.poll());
478		}
479
480		/**
481	<	* timed pool with zero timeout succeeds when non-empty, else times out
481	>	* timed poll with zero timeout succeeds when non-empty, else times out
482		*/
483	<	public void testTimedPoll0() {
484	<	try {
485	<	ArrayBlockingQueue q = populatedQueue(SIZE);
486	<	for (int i = 0; i < SIZE; ++i) {
487	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
488	<	}
489	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
469	<	} catch (InterruptedException e){
470	<	unexpectedException();
471	<	}
483	>	public void testTimedPoll0() throws InterruptedException {
484	>	ArrayBlockingQueue q = populatedQueue(SIZE);
485	>	for (int i = 0; i < SIZE; ++i) {
486	>	assertEquals(i, q.poll(0, MILLISECONDS));
487	>	}
488	>	assertNull(q.poll(0, MILLISECONDS));
489	>	checkEmpty(q);
490		}
491
492		/**
493	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
493	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
494		*/
495	<	public void testTimedPoll() {
496	<	try {
497	<	ArrayBlockingQueue q = populatedQueue(SIZE);
498	<	for (int i = 0; i < SIZE; ++i) {
499	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
500	<	}
501	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
502	<	} catch (InterruptedException e){
503	<	unexpectedException();
504	<	}
495	>	public void testTimedPoll() throws InterruptedException {
496	>	ArrayBlockingQueue q = populatedQueue(SIZE);
497	>	for (int i = 0; i < SIZE; ++i) {
498	>	long startTime = System.nanoTime();
499	>	assertEquals(i, q.poll(LONG_DELAY_MS, MILLISECONDS));
500	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
501	>	}
502	>	long startTime = System.nanoTime();
503	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
504	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
505	>	checkEmpty(q);
506		}
507
508		/**
509		* Interrupted timed poll throws InterruptedException instead of
510		* returning timeout status
511		*/
512	<	public void testInterruptedTimedPoll() {
513	<	Thread t = new Thread(new Runnable() {
514	<	public void run() {
515	<	try {
516	<	ArrayBlockingQueue q = populatedQueue(SIZE);
517	<	for (int i = 0; i < SIZE; ++i) {
518	<	threadAssertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
519	<	}
501	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
502	<	} catch (InterruptedException success){
503	<	}
504	<	}});
505	<	try {
506	<	t.start();
507	<	Thread.sleep(SHORT_DELAY_MS);
508	<	t.interrupt();
509	<	t.join();
510	<	}
511	<	catch (InterruptedException ie) {
512	<	unexpectedException();
513	<	}
514	<	}
512	>	public void testInterruptedTimedPoll() throws InterruptedException {
513	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
514	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
515	>	Thread t = newStartedThread(new CheckedRunnable() {
516	>	public void realRun() throws InterruptedException {
517	>	long startTime = System.nanoTime();
518	>	for (int i = 0; i < SIZE; i++)
519	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
520
521	<	/**
522	<	*  timed poll before a delayed offer fails; after offer succeeds;
523	<	*  on interruption throws
524	<	*/
525	<	public void testTimedPollWithOffer() {
526	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
522	<	Thread t = new Thread(new Runnable() {
523	<	public void run() {
524	<	try {
525	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
526	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
527	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
528	<	threadShouldThrow();
529	<	} catch (InterruptedException success) { }
530	<	}
531	<	});
532	<	try {
533	<	t.start();
534	<	Thread.sleep(SMALL_DELAY_MS);
535	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
536	<	t.interrupt();
537	<	t.join();
538	<	} catch (Exception e){
539	<	unexpectedException();
540	<	}
541	<	}
521	>	Thread.currentThread().interrupt();
522	>	try {
523	>	q.poll(randomTimeout(), randomTimeUnit());
524	>	shouldThrow();
525	>	} catch (InterruptedException success) {}
526	>	assertFalse(Thread.interrupted());
527
528	+	pleaseInterrupt.countDown();
529	+	try {
530	+	q.poll(LONG_DELAY_MS, MILLISECONDS);
531	+	shouldThrow();
532	+	} catch (InterruptedException success) {}
533	+	assertFalse(Thread.interrupted());
534	+
535	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
536	+	}});
537	+
538	+	await(pleaseInterrupt);
539	+	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
540	+	t.interrupt();
541	+	awaitTermination(t);
542	+	checkEmpty(q);
543	+	}
544
545		/**
546		* peek returns next element, or null if empty
#	Line 547 | Line 548 | public class ArrayBlockingQueueTest exte
548		public void testPeek() {
549		ArrayBlockingQueue q = populatedQueue(SIZE);
550		for (int i = 0; i < SIZE; ++i) {
551	<	assertEquals(i, ((Integer)q.peek()).intValue());
552	<	q.poll();
551	>	assertEquals(i, q.peek());
552	>	assertEquals(i, q.poll());
553		assertTrue(q.peek() == null ||
554	<	i != ((Integer)q.peek()).intValue());
554	>	!q.peek().equals(i));
555		}
556	<	assertNull(q.peek());
556	>	assertNull(q.peek());
557		}
558
559		/**
#	Line 561 | Line 562 | public class ArrayBlockingQueueTest exte
562		public void testElement() {
563		ArrayBlockingQueue q = populatedQueue(SIZE);
564		for (int i = 0; i < SIZE; ++i) {
565	<	assertEquals(i, ((Integer)q.element()).intValue());
566	<	q.poll();
565	>	assertEquals(i, q.element());
566	>	assertEquals(i, q.poll());
567		}
568		try {
569		q.element();
570		shouldThrow();
571	<	}
571	<	catch (NoSuchElementException success) {}
571	>	} catch (NoSuchElementException success) {}
572		}
573
574		/**
#	Line 577 | Line 577 | public class ArrayBlockingQueueTest exte
577		public void testRemove() {
578		ArrayBlockingQueue q = populatedQueue(SIZE);
579		for (int i = 0; i < SIZE; ++i) {
580	<	assertEquals(i, ((Integer)q.remove()).intValue());
580	>	assertEquals(i, q.remove());
581		}
582		try {
583		q.remove();
584		shouldThrow();
585	<	} catch (NoSuchElementException success){
586	<	}
585	>	} catch (NoSuchElementException success) {}
586		}
587
588		/**
590	–	* remove(x) removes x and returns true if present
591	–	*/
592	–	public void testRemoveElement() {
593	–	ArrayBlockingQueue q = populatedQueue(SIZE);
594	–	for (int i = 1; i < SIZE; i+=2) {
595	–	assertTrue(q.remove(new Integer(i)));
596	–	}
597	–	for (int i = 0; i < SIZE; i+=2) {
598	–	assertTrue(q.remove(new Integer(i)));
599	–	assertFalse(q.remove(new Integer(i+1)));
600	–	}
601	–	assertTrue(q.isEmpty());
602	–	}
603	–
604	–	/**
589		* contains(x) reports true when elements added but not yet removed
590		*/
591		public void testContains() {
592	<	ArrayBlockingQueue q = populatedQueue(SIZE);
593	<	for (int i = 0; i < SIZE; ++i) {
592	>	int size = ThreadLocalRandom.current().nextInt(1, SIZE);
593	>	ArrayBlockingQueue q = populatedQueue(size, size, 2 * size, false);
594	>	assertFalse(q.contains(null));
595	>	for (int i = 0; i < size; ++i) {
596		assertTrue(q.contains(new Integer(i)));
597	<	q.poll();
597	>	assertEquals(i, q.poll());
598		assertFalse(q.contains(new Integer(i)));
599		}
600		}
#	Line 617 | Line 603 | public class ArrayBlockingQueueTest exte
603		* clear removes all elements
604		*/
605		public void testClear() {
606	<	ArrayBlockingQueue q = populatedQueue(SIZE);
606	>	int size = ThreadLocalRandom.current().nextInt(1, 5);
607	>	ArrayBlockingQueue q = populatedQueue(size, size, 2 * size, false);
608	>	int capacity = size + q.remainingCapacity();
609		q.clear();
610		assertTrue(q.isEmpty());
611		assertEquals(0, q.size());
612	<	assertEquals(SIZE, q.remainingCapacity());
612	>	assertEquals(capacity, q.remainingCapacity());
613		q.add(one);
614		assertFalse(q.isEmpty());
615	+	assertTrue(q.contains(one));
616		q.clear();
617		assertTrue(q.isEmpty());
618		}
#	Line 656 | Line 645 | public class ArrayBlockingQueueTest exte
645		assertTrue(changed);
646
647		assertTrue(q.containsAll(p));
648	<	assertEquals(SIZE-i, q.size());
648	>	assertEquals(SIZE - i, q.size());
649		p.remove();
650		}
651		}
#	Line 669 | Line 658 | public class ArrayBlockingQueueTest exte
658		ArrayBlockingQueue q = populatedQueue(SIZE);
659		ArrayBlockingQueue p = populatedQueue(i);
660		assertTrue(q.removeAll(p));
661	<	assertEquals(SIZE-i, q.size());
661	>	assertEquals(SIZE - i, q.size());
662		for (int j = 0; j < i; ++j) {
663	<	Integer I = (Integer)(p.remove());
664	<	assertFalse(q.contains(I));
663	>	Integer x = (Integer)(p.remove());
664	>	assertFalse(q.contains(x));
665		}
666		}
667		}
668
669	+	void checkToArray(ArrayBlockingQueue<Integer> q) {
670	+	int size = q.size();
671	+	Object[] a1 = q.toArray();
672	+	assertEquals(size, a1.length);
673	+	Integer[] a2 = q.toArray(new Integer[0]);
674	+	assertEquals(size, a2.length);
675	+	Integer[] a3 = q.toArray(new Integer[Math.max(0, size - 1)]);
676	+	assertEquals(size, a3.length);
677	+	Integer[] a4 = new Integer[size];
678	+	assertSame(a4, q.toArray(a4));
679	+	Integer[] a5 = new Integer[size + 1];
680	+	Arrays.fill(a5, 42);
681	+	assertSame(a5, q.toArray(a5));
682	+	Integer[] a6 = new Integer[size + 2];
683	+	Arrays.fill(a6, 42);
684	+	assertSame(a6, q.toArray(a6));
685	+	Object[][] as = { a1, a2, a3, a4, a5, a6 };
686	+	for (Object[] a : as) {
687	+	if (a.length > size) assertNull(a[size]);
688	+	if (a.length > size + 1) assertEquals(42, a[size + 1]);
689	+	}
690	+	Iterator it = q.iterator();
691	+	Integer s = q.peek();
692	+	for (int i = 0; i < size; i++) {
693	+	Integer x = (Integer) it.next();
694	+	assertEquals(s + i, (int) x);
695	+	for (Object[] a : as)
696	+	assertSame(a1[i], x);
697	+	}
698	+	}
699	+
700		/**
701	<	*  toArray contains all elements
701	>	* toArray() and toArray(a) contain all elements in FIFO order
702		*/
703		public void testToArray() {
704	<	ArrayBlockingQueue q = populatedQueue(SIZE);
705	<	Object[] o = q.toArray();
706	<	try {
707	<	for(int i = 0; i < o.length; i++)
708	<	assertEquals(o[i], q.take());
709	<	} catch (InterruptedException e){
710	<	unexpectedException();
711	<	}
704	>	final ThreadLocalRandom rnd = ThreadLocalRandom.current();
705	>	final int size = rnd.nextInt(6);
706	>	final int capacity = Math.max(1, size + rnd.nextInt(size + 1));
707	>	ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<>(capacity);
708	>	for (int i = 0; i < size; i++) {
709	>	checkToArray(q);
710	>	q.add(i);
711	>	}
712	>	// Provoke wraparound
713	>	int added = size * 2;
714	>	for (int i = 0; i < added; i++) {
715	>	checkToArray(q);
716	>	assertEquals((Integer) i, q.poll());
717	>	q.add(size + i);
718	>	}
719	>	for (int i = 0; i < size; i++) {
720	>	checkToArray(q);
721	>	assertEquals((Integer) (added + i), q.poll());
722	>	}
723		}
724
725		/**
726	<	* toArray(a) contains all elements
727	<	*/
728	<	public void testToArray2() {
729	<	ArrayBlockingQueue q = populatedQueue(SIZE);
730	<	Integer[] ints = new Integer[SIZE];
731	<	ints = (Integer[])q.toArray(ints);
732	<	try {
733	<	for(int i = 0; i < ints.length; i++)
734	<	assertEquals(ints[i], q.take());
735	<	} catch (InterruptedException e){
736	<	unexpectedException();
737	<	}
726	>	* toArray(incompatible array type) throws ArrayStoreException
727	>	*/
728	>	public void testToArray_incompatibleArrayType() {
729	>	ArrayBlockingQueue q = populatedQueue(SIZE);
730	>	try {
731	>	q.toArray(new String[10]);
732	>	shouldThrow();
733	>	} catch (ArrayStoreException success) {}
734	>	try {
735	>	q.toArray(new String[0]);
736	>	shouldThrow();
737	>	} catch (ArrayStoreException success) {}
738		}
739	<
739	>
740		/**
741		* iterator iterates through all elements
742		*/
743	<	public void testIterator() {
743	>	public void testIterator() throws InterruptedException {
744		ArrayBlockingQueue q = populatedQueue(SIZE);
745	<	Iterator it = q.iterator();
746	<	try {
747	<	while(it.hasNext()){
748	<	assertEquals(it.next(), q.take());
749	<	}
750	<	} catch (InterruptedException e){
751	<	unexpectedException();
752	<	}
745	>	Iterator it = q.iterator();
746	>	int i;
747	>	for (i = 0; it.hasNext(); i++)
748	>	assertTrue(q.contains(it.next()));
749	>	assertEquals(i, SIZE);
750	>	assertIteratorExhausted(it);
751	>
752	>	it = q.iterator();
753	>	for (i = 0; it.hasNext(); i++)
754	>	assertEquals(it.next(), q.take());
755	>	assertEquals(i, SIZE);
756	>	assertIteratorExhausted(it);
757	>	}
758	>
759	>	/**
760	>	* iterator of empty collection has no elements
761	>	*/
762	>	public void testEmptyIterator() {
763	>	assertIteratorExhausted(new ArrayBlockingQueue(SIZE).iterator());
764		}
765
766		/**
767		* iterator.remove removes current element
768		*/
769	<	public void testIteratorRemove () {
769	>	public void testIteratorRemove() {
770		final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
771		q.add(two);
772		q.add(one);
#	Line 733 | Line 775 | public class ArrayBlockingQueueTest exte
775		Iterator it = q.iterator();
776		it.next();
777		it.remove();
778	<
778	>
779		it = q.iterator();
780	<	assertEquals(it.next(), one);
781	<	assertEquals(it.next(), three);
780	>	assertSame(it.next(), one);
781	>	assertSame(it.next(), three);
782		assertFalse(it.hasNext());
783		}
784
#	Line 753 | Line 795 | public class ArrayBlockingQueueTest exte
795
796		int k = 0;
797		for (Iterator it = q.iterator(); it.hasNext();) {
798	<	int i = ((Integer)(it.next())).intValue();
757	<	assertEquals(++k, i);
798	>	assertEquals(++k, it.next());
799		}
800		assertEquals(3, k);
801		}
#	Line 762 | Line 803 | public class ArrayBlockingQueueTest exte
803		/**
804		* Modifications do not cause iterators to fail
805		*/
806	<	public void testWeaklyConsistentIteration () {
806	>	public void testWeaklyConsistentIteration() {
807		final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
808		q.add(one);
809		q.add(two);
810		q.add(three);
811	<	try {
812	<	for (Iterator it = q.iterator(); it.hasNext();) {
813	<	q.remove();
773	<	it.next();
774	<	}
775	<	}
776	<	catch (ConcurrentModificationException e) {
777	<	unexpectedException();
811	>	for (Iterator it = q.iterator(); it.hasNext();) {
812	>	q.remove();
813	>	it.next();
814		}
815		assertEquals(0, q.size());
816		}
817
782	–
818		/**
819		* toString contains toStrings of elements
820		*/
#	Line 787 | Line 822 | public class ArrayBlockingQueueTest exte
822		ArrayBlockingQueue q = populatedQueue(SIZE);
823		String s = q.toString();
824		for (int i = 0; i < SIZE; ++i) {
825	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
825	>	assertTrue(s.contains(String.valueOf(i)));
826		}
827	<	}
793	<
827	>	}
828
829		/**
830		* offer transfers elements across Executor tasks
#	Line 799 | Line 833 | public class ArrayBlockingQueueTest exte
833		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
834		q.add(one);
835		q.add(two);
836	<	ExecutorService executor = Executors.newFixedThreadPool(2);
837	<	executor.execute(new Runnable() {
838	<	public void run() {
839	<	threadAssertFalse(q.offer(three));
840	<	try {
841	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
842	<	threadAssertEquals(0, q.remainingCapacity());
843	<	}
844	<	catch (InterruptedException e) {
845	<	threadUnexpectedException();
812	<	}
813	<	}
814	<	});
815	<
816	<	executor.execute(new Runnable() {
817	<	public void run() {
818	<	try {
819	<	Thread.sleep(SMALL_DELAY_MS);
820	<	threadAssertEquals(one, q.take());
821	<	}
822	<	catch (InterruptedException e) {
823	<	threadUnexpectedException();
824	<	}
825	<	}
826	<	});
827	<
828	<	joinPool(executor);
836	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
837	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
838	>	try (PoolCleaner cleaner = cleaner(executor)) {
839	>	executor.execute(new CheckedRunnable() {
840	>	public void realRun() throws InterruptedException {
841	>	assertFalse(q.offer(three));
842	>	threadsStarted.await();
843	>	assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS));
844	>	assertEquals(0, q.remainingCapacity());
845	>	}});
846
847	+	executor.execute(new CheckedRunnable() {
848	+	public void realRun() throws InterruptedException {
849	+	threadsStarted.await();
850	+	assertEquals(0, q.remainingCapacity());
851	+	assertSame(one, q.take());
852	+	}});
853	+	}
854		}
855
856		/**
857	<	* poll retrieves elements across Executor threads
857	>	* timed poll retrieves elements across Executor threads
858		*/
859		public void testPollInExecutor() {
860		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
861	<	ExecutorService executor = Executors.newFixedThreadPool(2);
862	<	executor.execute(new Runnable() {
863	<	public void run() {
864	<	threadAssertNull(q.poll());
865	<	try {
866	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
867	<	threadAssertTrue(q.isEmpty());
868	<	}
869	<	catch (InterruptedException e) {
870	<	threadUnexpectedException();
847	<	}
848	<	}
849	<	});
861	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
862	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
863	>	try (PoolCleaner cleaner = cleaner(executor)) {
864	>	executor.execute(new CheckedRunnable() {
865	>	public void realRun() throws InterruptedException {
866	>	assertNull(q.poll());
867	>	threadsStarted.await();
868	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
869	>	checkEmpty(q);
870	>	}});
871
872	<	executor.execute(new Runnable() {
873	<	public void run() {
874	<	try {
854	<	Thread.sleep(SMALL_DELAY_MS);
872	>	executor.execute(new CheckedRunnable() {
873	>	public void realRun() throws InterruptedException {
874	>	threadsStarted.await();
875		q.put(one);
876	<	}
877	<	catch (InterruptedException e) {
858	<	threadUnexpectedException();
859	<	}
860	<	}
861	<	});
862	<
863	<	joinPool(executor);
876	>	}});
877	>	}
878		}
879
880		/**
881	<	* A deserialized serialized queue has same elements in same order
881	>	* A deserialized/reserialized queue has same elements in same order
882		*/
883	<	public void testSerialization() {
883	>	public void testSerialization() throws Exception {
884	>	Queue x = populatedQueue(SIZE);
885	>	Queue y = serialClone(x);
886	>
887	>	assertNotSame(x, y);
888	>	assertEquals(x.size(), y.size());
889	>	assertEquals(x.toString(), y.toString());
890	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
891	>	while (!x.isEmpty()) {
892	>	assertFalse(y.isEmpty());
893	>	assertEquals(x.remove(), y.remove());
894	>	}
895	>	assertTrue(y.isEmpty());
896	>	}
897	>
898	>	/**
899	>	* drainTo(c) empties queue into another collection c
900	>	*/
901	>	public void testDrainTo() {
902		ArrayBlockingQueue q = populatedQueue(SIZE);
903	+	ArrayList l = new ArrayList();
904	+	q.drainTo(l);
905	+	assertEquals(0, q.size());
906	+	assertEquals(SIZE, l.size());
907	+	for (int i = 0; i < SIZE; ++i)
908	+	assertEquals(l.get(i), new Integer(i));
909	+	q.add(zero);
910	+	q.add(one);
911	+	assertFalse(q.isEmpty());
912	+	assertTrue(q.contains(zero));
913	+	assertTrue(q.contains(one));
914	+	l.clear();
915	+	q.drainTo(l);
916	+	assertEquals(0, q.size());
917	+	assertEquals(2, l.size());
918	+	for (int i = 0; i < 2; ++i)
919	+	assertEquals(l.get(i), new Integer(i));
920	+	}
921
922	<	try {
923	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
924	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
925	<	out.writeObject(q);
926	<	out.close();
922	>	/**
923	>	* drainTo empties full queue, unblocking a waiting put.
924	>	*/
925	>	public void testDrainToWithActivePut() throws InterruptedException {
926	>	final ArrayBlockingQueue q = populatedQueue(SIZE);
927	>	Thread t = new Thread(new CheckedRunnable() {
928	>	public void realRun() throws InterruptedException {
929	>	q.put(new Integer(SIZE + 1));
930	>	}});
931	>
932	>	t.start();
933	>	ArrayList l = new ArrayList();
934	>	q.drainTo(l);
935	>	assertTrue(l.size() >= SIZE);
936	>	for (int i = 0; i < SIZE; ++i)
937	>	assertEquals(l.get(i), new Integer(i));
938	>	t.join();
939	>	assertTrue(q.size() + l.size() >= SIZE);
940	>	}
941
942	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
943	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
944	<	ArrayBlockingQueue r = (ArrayBlockingQueue)in.readObject();
945	<	assertEquals(q.size(), r.size());
946	<	while (!q.isEmpty())
947	<	assertEquals(q.remove(), r.remove());
948	<	} catch(Exception e){
949	<	unexpectedException();
942	>	/**
943	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
944	>	*/
945	>	public void testDrainToN() {
946	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE * 2);
947	>	for (int i = 0; i < SIZE + 2; ++i) {
948	>	for (int j = 0; j < SIZE; j++)
949	>	assertTrue(q.offer(new Integer(j)));
950	>	ArrayList l = new ArrayList();
951	>	q.drainTo(l, i);
952	>	int k = (i < SIZE) ? i : SIZE;
953	>	assertEquals(k, l.size());
954	>	assertEquals(SIZE - k, q.size());
955	>	for (int j = 0; j < k; ++j)
956	>	assertEquals(l.get(j), new Integer(j));
957	>	do {} while (q.poll() != null);
958		}
959		}
960
961	+	/**
962	+	* remove(null), contains(null) always return false
963	+	*/
964	+	public void testNeverContainsNull() {
965	+	Collection<?>[] qs = {
966	+	populatedQueue(0, 1, 10, false),
967	+	populatedQueue(2, 2, 10, true),
968	+	};
969
970	+	for (Collection<?> q : qs) {
971	+	assertFalse(q.contains(null));
972	+	assertFalse(q.remove(null));
973	+	}
974	+	}
975		}

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