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

Comparing jsr166/src/test/tck/ArrayBlockingQueueTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.74 by jsr166, Sun Oct 30 21:07:27 2016 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 junit.framework.*;
10	<	import java.util.*;
11	<	import java.util.concurrent.*;
12	<	import java.io.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	>
11	>	import java.util.ArrayList;
12	>	import java.util.Arrays;
13	>	import java.util.Collection;
14	>	import java.util.Iterator;
15	>	import java.util.NoSuchElementException;
16	>	import java.util.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	>	import java.util.concurrent.ThreadLocalRandom;
23	>
24	>	import junit.framework.Test;
25
26		public class ArrayBlockingQueueTest extends JSR166TestCase {
27
28	+	public static class Fair extends BlockingQueueTest {
29	+	protected BlockingQueue emptyCollection() {
30	+	return new ArrayBlockingQueue(SIZE, true);
31	+	}
32	+	}
33	+
34	+	public static class NonFair extends BlockingQueueTest {
35	+	protected BlockingQueue emptyCollection() {
36	+	return new ArrayBlockingQueue(SIZE, false);
37	+	}
38	+	}
39	+
40		public static void main(String[] args) {
41	<	junit.textui.TestRunner.run (suite());
41	>	main(suite(), args);
42		}
43
44		public static Test suite() {
45	<	return new TestSuite(ArrayBlockingQueueTest.class);
45	>	class Implementation implements CollectionImplementation {
46	>	public Class<?> klazz() { return ArrayBlockingQueue.class; }
47	>	public Collection emptyCollection() { return new ArrayBlockingQueue(SIZE, false); }
48	>	public Object makeElement(int i) { return i; }
49	>	public boolean isConcurrent() { return true; }
50	>	public boolean permitsNulls() { return false; }
51	>	}
52	>	return newTestSuite(ArrayBlockingQueueTest.class,
53	>	new Fair().testSuite(),
54	>	new NonFair().testSuite(),
55	>	CollectionTest.testSuite(new Implementation()));
56		}
57
58		/**
59	<	* Create a queue of given size containing consecutive
60	<	* Integers 0 ... n.
59	>	* Returns a new queue of given size containing consecutive
60	>	* Integers 0 ... n - 1.
61		*/
62	<	private ArrayBlockingQueue populatedQueue(int n) {
63	<	ArrayBlockingQueue q = new ArrayBlockingQueue(n);
62	>	private ArrayBlockingQueue<Integer> populatedQueue(int n) {
63	>	ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<Integer>(n);
64		assertTrue(q.isEmpty());
65	<	for(int i = 0; i < n; i++)
66	<	assertTrue(q.offer(new Integer(i)));
65	>	for (int i = 0; i < n; i++)
66	>	assertTrue(q.offer(new Integer(i)));
67		assertFalse(q.isEmpty());
68		assertEquals(0, q.remainingCapacity());
69	<	assertEquals(n, q.size());
69	>	assertEquals(n, q.size());
70	>	assertEquals((Integer) 0, q.peek());
71		return q;
72		}
73	<
74	<	public void testConstructor1(){
73	>
74	>	/**
75	>	* A new queue has the indicated capacity
76	>	*/
77	>	public void testConstructor1() {
78		assertEquals(SIZE, new ArrayBlockingQueue(SIZE).remainingCapacity());
79		}
80
81	<	public void testConstructor2(){
81	>	/**
82	>	* Constructor throws IAE if capacity argument nonpositive
83	>	*/
84	>	public void testConstructor2() {
85		try {
86	<	ArrayBlockingQueue q = new ArrayBlockingQueue(0);
87	<	fail("Cannot make zero-sized");
88	<	}
47	<	catch (IllegalArgumentException success) {}
86	>	new ArrayBlockingQueue(0);
87	>	shouldThrow();
88	>	} catch (IllegalArgumentException success) {}
89		}
90
91	<	public void testConstructor3(){
92	<
91	>	/**
92	>	* Initializing from null Collection throws NPE
93	>	*/
94	>	public void testConstructor3() {
95		try {
96	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1, true, null);
97	<	fail("Cannot make from null collection");
98	<	}
56	<	catch (NullPointerException success) {}
96	>	new ArrayBlockingQueue(1, true, null);
97	>	shouldThrow();
98	>	} catch (NullPointerException success) {}
99		}
100
101	<	public void testConstructor4(){
101	>	/**
102	>	* Initializing from Collection of null elements throws NPE
103	>	*/
104	>	public void testConstructor4() {
105	>	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
106		try {
107	<	Integer[] ints = new Integer[SIZE];
108	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
109	<	fail("Cannot make with null elements");
64	<	}
65	<	catch (NullPointerException success) {}
107	>	new ArrayBlockingQueue(SIZE, false, elements);
108	>	shouldThrow();
109	>	} catch (NullPointerException success) {}
110		}
111
112	<	public void testConstructor5(){
113	<	try {
114	<	Integer[] ints = new Integer[SIZE];
115	<	for (int i = 0; i < SIZE-1; ++i)
116	<	ints[i] = new Integer(i);
117	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
118	<	fail("Cannot make with null elements");
119	<	}
120	<	catch (NullPointerException success) {}
112	>	/**
113	>	* Initializing from Collection with some null elements throws NPE
114	>	*/
115	>	public void testConstructor5() {
116	>	Integer[] ints = new Integer[SIZE];
117	>	for (int i = 0; i < SIZE - 1; ++i)
118	>	ints[i] = i;
119	>	Collection<Integer> elements = Arrays.asList(ints);
120	>	try {
121	>	new ArrayBlockingQueue(SIZE, false, elements);
122	>	shouldThrow();
123	>	} catch (NullPointerException success) {}
124		}
125
126	<	public void testConstructor6(){
127	<	try {
128	<	Integer[] ints = new Integer[SIZE];
129	<	for (int i = 0; i < SIZE; ++i)
130	<	ints[i] = new Integer(i);
131	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1, false, Arrays.asList(ints));
132	<	fail("Cannot make with insufficient capacity");
133	<	}
134	<	catch (IllegalArgumentException success) {}
126	>	/**
127	>	* Initializing from too large collection throws IAE
128	>	*/
129	>	public void testConstructor6() {
130	>	Integer[] ints = new Integer[SIZE];
131	>	for (int i = 0; i < SIZE; ++i)
132	>	ints[i] = i;
133	>	Collection<Integer> elements = Arrays.asList(ints);
134	>	try {
135	>	new ArrayBlockingQueue(SIZE - 1, false, elements);
136	>	shouldThrow();
137	>	} catch (IllegalArgumentException success) {}
138		}
139
140	<	public void testConstructor7(){
141	<	try {
142	<	Integer[] ints = new Integer[SIZE];
143	<	for (int i = 0; i < SIZE; ++i)
144	<	ints[i] = new Integer(i);
145	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, true, Arrays.asList(ints));
146	<	for (int i = 0; i < SIZE; ++i)
147	<	assertEquals(ints[i], q.poll());
148	<	}
149	<	finally {}
140	>	/**
141	>	* Queue contains all elements of collection used to initialize
142	>	*/
143	>	public void testConstructor7() {
144	>	Integer[] ints = new Integer[SIZE];
145	>	for (int i = 0; i < SIZE; ++i)
146	>	ints[i] = i;
147	>	Collection<Integer> elements = Arrays.asList(ints);
148	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, true, elements);
149	>	for (int i = 0; i < SIZE; ++i)
150	>	assertEquals(ints[i], q.poll());
151		}
152
153	+	/**
154	+	* Queue transitions from empty to full when elements added
155	+	*/
156		public void testEmptyFull() {
157		ArrayBlockingQueue q = new ArrayBlockingQueue(2);
158		assertTrue(q.isEmpty());
159	<	assertEquals("should have room for 2", 2, q.remainingCapacity());
159	>	assertEquals(2, q.remainingCapacity());
160		q.add(one);
161		assertFalse(q.isEmpty());
162		q.add(two);
163		assertFalse(q.isEmpty());
164	<	assertEquals("queue should be full", 0, q.remainingCapacity());
165	<	assertFalse("offer should be rejected", q.offer(three));
164	>	assertEquals(0, q.remainingCapacity());
165	>	assertFalse(q.offer(three));
166		}
167
168	<	public void testRemainingCapacity(){
169	<	ArrayBlockingQueue q = populatedQueue(SIZE);
168	>	/**
169	>	* remainingCapacity decreases on add, increases on remove
170	>	*/
171	>	public void testRemainingCapacity() {
172	>	BlockingQueue q = populatedQueue(SIZE);
173		for (int i = 0; i < SIZE; ++i) {
174		assertEquals(i, q.remainingCapacity());
175	<	assertEquals(SIZE-i, q.size());
176	<	q.remove();
175	>	assertEquals(SIZE, q.size() + q.remainingCapacity());
176	>	assertEquals(i, q.remove());
177		}
178		for (int i = 0; i < SIZE; ++i) {
179	<	assertEquals(SIZE-i, q.remainingCapacity());
180	<	assertEquals(i, q.size());
181	<	q.add(new Integer(i));
179	>	assertEquals(SIZE - i, q.remainingCapacity());
180	>	assertEquals(SIZE, q.size() + q.remainingCapacity());
181	>	assertTrue(q.add(i));
182		}
183		}
184
185	<	public void testOfferNull(){
186	<	try {
187	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
188	<	q.offer(null);
132	<	fail("should throw NPE");
133	<	} catch (NullPointerException success) { }
134	<	}
135	<
136	<	public void testOffer(){
185	>	/**
186	>	* Offer succeeds if not full; fails if full
187	>	*/
188	>	public void testOffer() {
189		ArrayBlockingQueue q = new ArrayBlockingQueue(1);
190		assertTrue(q.offer(zero));
191		assertFalse(q.offer(one));
192		}
193
194	<	public void testAdd(){
195	<	try {
196	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
197	<	for (int i = 0; i < SIZE; ++i) {
198	<	assertTrue(q.add(new Integer(i)));
199	<	}
200	<	assertEquals(0, q.remainingCapacity());
194	>	/**
195	>	* add succeeds if not full; throws ISE if full
196	>	*/
197	>	public void testAdd() {
198	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
199	>	for (int i = 0; i < SIZE; ++i) {
200	>	assertTrue(q.add(new Integer(i)));
201	>	}
202	>	assertEquals(0, q.remainingCapacity());
203	>	try {
204		q.add(new Integer(SIZE));
205	<	} catch (IllegalStateException success){
206	<	}
205	>	shouldThrow();
206	>	} catch (IllegalStateException success) {}
207		}
208
209	<	public void testAddAll1(){
210	<	try {
211	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
212	<	q.addAll(null);
213	<	fail("Cannot add null collection");
159	<	}
160	<	catch (NullPointerException success) {}
161	<	}
162	<	public void testAddAll2(){
209	>	/**
210	>	* addAll(this) throws IAE
211	>	*/
212	>	public void testAddAllSelf() {
213	>	ArrayBlockingQueue q = populatedQueue(SIZE);
214		try {
215	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
216	<	Integer[] ints = new Integer[SIZE];
217	<	q.addAll(Arrays.asList(ints));
167	<	fail("Cannot add null elements");
168	<	}
169	<	catch (NullPointerException success) {}
215	>	q.addAll(q);
216	>	shouldThrow();
217	>	} catch (IllegalArgumentException success) {}
218		}
219	<	public void testAddAll3(){
219	>
220	>	/**
221	>	* addAll of a collection with any null elements throws NPE after
222	>	* possibly adding some elements
223	>	*/
224	>	public void testAddAll3() {
225	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
226	>	Integer[] ints = new Integer[SIZE];
227	>	for (int i = 0; i < SIZE - 1; ++i)
228	>	ints[i] = new Integer(i);
229		try {
173	–	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
174	–	Integer[] ints = new Integer[SIZE];
175	–	for (int i = 0; i < SIZE-1; ++i)
176	–	ints[i] = new Integer(i);
230		q.addAll(Arrays.asList(ints));
231	<	fail("Cannot add null elements");
232	<	}
180	<	catch (NullPointerException success) {}
231	>	shouldThrow();
232	>	} catch (NullPointerException success) {}
233		}
234	<	public void testAddAll4(){
234	>
235	>	/**
236	>	* addAll throws ISE if not enough room
237	>	*/
238	>	public void testAddAll4() {
239	>	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
240	>	Integer[] ints = new Integer[SIZE];
241	>	for (int i = 0; i < SIZE; ++i)
242	>	ints[i] = new Integer(i);
243		try {
184	–	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
185	–	Integer[] ints = new Integer[SIZE];
186	–	for (int i = 0; i < SIZE; ++i)
187	–	ints[i] = new Integer(i);
244		q.addAll(Arrays.asList(ints));
245	<	fail("Cannot add with insufficient capacity");
246	<	}
191	<	catch (IllegalStateException success) {}
192	<	}
193	<	public void testAddAll5(){
194	<	try {
195	<	Integer[] empty = new Integer[0];
196	<	Integer[] ints = new Integer[SIZE];
197	<	for (int i = 0; i < SIZE; ++i)
198	<	ints[i] = new Integer(i);
199	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
200	<	assertFalse(q.addAll(Arrays.asList(empty)));
201	<	assertTrue(q.addAll(Arrays.asList(ints)));
202	<	for (int i = 0; i < SIZE; ++i)
203	<	assertEquals(ints[i], q.poll());
204	<	}
205	<	finally {}
206	<	}
207	<
208	<	public void testPutNull() {
209	<	try {
210	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
211	<	q.put(null);
212	<	fail("put should throw NPE");
213	<	}
214	<	catch (NullPointerException success){
215	<	}
216	<	catch (InterruptedException ie) {
217	<	fail("Unexpected exception");
218	<	}
219	<	}
220	<
221	<	public void testPut() {
222	<	try {
223	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
224	<	for (int i = 0; i < SIZE; ++i) {
225	<	Integer I = new Integer(i);
226	<	q.put(I);
227	<	assertTrue(q.contains(I));
228	<	}
229	<	assertEquals(0, q.remainingCapacity());
230	<	}
231	<	catch (InterruptedException ie) {
232	<	fail("Unexpected exception");
233	<	}
245	>	shouldThrow();
246	>	} catch (IllegalStateException success) {}
247		}
248
249	<	public void testBlockingPut(){
250	<	Thread t = new Thread(new Runnable() {
251	<	public void run() {
252	<	int added = 0;
253	<	try {
254	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
255	<	for (int i = 0; i < SIZE; ++i) {
256	<	q.put(new Integer(i));
257	<	++added;
258	<	}
259	<	q.put(new Integer(SIZE));
260	<	threadFail("put should block");
261	<	} catch (InterruptedException ie){
249	<	threadAssertEquals(added, SIZE);
250	<	}
251	<	}});
252	<	try {
253	<	t.start();
254	<	Thread.sleep(SHORT_DELAY_MS);
255	<	t.interrupt();
256	<	t.join();
257	<	}
258	<	catch (InterruptedException ie) {
259	<	fail("Unexpected exception");
260	<	}
249	>	/**
250	>	* Queue contains all elements, in traversal order, of successful addAll
251	>	*/
252	>	public void testAddAll5() {
253	>	Integer[] empty = new Integer[0];
254	>	Integer[] ints = new Integer[SIZE];
255	>	for (int i = 0; i < SIZE; ++i)
256	>	ints[i] = new Integer(i);
257	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
258	>	assertFalse(q.addAll(Arrays.asList(empty)));
259	>	assertTrue(q.addAll(Arrays.asList(ints)));
260	>	for (int i = 0; i < SIZE; ++i)
261	>	assertEquals(ints[i], q.poll());
262		}
263
264	<	public void testPutWithTake() {
265	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
266	<	Thread t = new Thread(new Runnable() {
267	<	public void run(){
268	<	int added = 0;
269	<	try {
270	<	q.put(new Object());
271	<	++added;
272	<	q.put(new Object());
272	<	++added;
273	<	q.put(new Object());
274	<	++added;
275	<	q.put(new Object());
276	<	++added;
277	<	threadFail("Should block");
278	<	} catch (InterruptedException e){
279	<	threadAssertTrue(added >= 2);
280	<	}
281	<	}
282	<	});
283	<	try {
284	<	t.start();
285	<	Thread.sleep(SHORT_DELAY_MS);
286	<	q.take();
287	<	t.interrupt();
288	<	t.join();
289	<	} catch (Exception e){
290	<	fail("Unexpected exception");
264	>	/**
265	>	* all elements successfully put are contained
266	>	*/
267	>	public void testPut() throws InterruptedException {
268	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
269	>	for (int i = 0; i < SIZE; ++i) {
270	>	Integer x = new Integer(i);
271	>	q.put(x);
272	>	assertTrue(q.contains(x));
273		}
274	+	assertEquals(0, q.remainingCapacity());
275		}
276
277	<	public void testTimedOffer() {
278	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
279	<	Thread t = new Thread(new Runnable() {
280	<	public void run(){
281	<	try {
282	<	q.put(new Object());
283	<	q.put(new Object());
284	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
285	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
286	<	threadFail("Should block");
287	<	} catch (InterruptedException success){}
288	<	}
289	<	});
290	<
291	<	try {
292	<	t.start();
293	<	Thread.sleep(SHORT_DELAY_MS);
294	<	t.interrupt();
295	<	t.join();
296	<	} catch (Exception e){
297	<	fail("Unexpected exception");
298	<	}
277	>	/**
278	>	* put blocks interruptibly if full
279	>	*/
280	>	public void testBlockingPut() throws InterruptedException {
281	>	final ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
282	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
283	>	Thread t = newStartedThread(new CheckedRunnable() {
284	>	public void realRun() throws InterruptedException {
285	>	for (int i = 0; i < SIZE; ++i)
286	>	q.put(i);
287	>	assertEquals(SIZE, q.size());
288	>	assertEquals(0, q.remainingCapacity());
289	>
290	>	Thread.currentThread().interrupt();
291	>	try {
292	>	q.put(99);
293	>	shouldThrow();
294	>	} catch (InterruptedException success) {}
295	>	assertFalse(Thread.interrupted());
296	>
297	>	pleaseInterrupt.countDown();
298	>	try {
299	>	q.put(99);
300	>	shouldThrow();
301	>	} catch (InterruptedException success) {}
302	>	assertFalse(Thread.interrupted());
303	>	}});
304	>
305	>	await(pleaseInterrupt);
306	>	assertThreadStaysAlive(t);
307	>	t.interrupt();
308	>	awaitTermination(t);
309	>	assertEquals(SIZE, q.size());
310	>	assertEquals(0, q.remainingCapacity());
311		}
312
313	<	public void testTake(){
314	<	try {
315	<	ArrayBlockingQueue q = populatedQueue(SIZE);
316	<	for (int i = 0; i < SIZE; ++i) {
317	<	assertEquals(i, ((Integer)q.take()).intValue());
318	<	}
319	<	} catch (InterruptedException e){
320	<	fail("Unexpected exception");
321	<	}
313	>	/**
314	>	* put blocks interruptibly waiting for take when full
315	>	*/
316	>	public void testPutWithTake() throws InterruptedException {
317	>	final int capacity = 2;
318	>	final ArrayBlockingQueue q = new ArrayBlockingQueue(capacity);
319	>	final CountDownLatch pleaseTake = new CountDownLatch(1);
320	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
321	>	Thread t = newStartedThread(new CheckedRunnable() {
322	>	public void realRun() throws InterruptedException {
323	>	for (int i = 0; i < capacity; i++)
324	>	q.put(i);
325	>	pleaseTake.countDown();
326	>	q.put(86);
327	>
328	>	pleaseInterrupt.countDown();
329	>	try {
330	>	q.put(99);
331	>	shouldThrow();
332	>	} catch (InterruptedException success) {}
333	>	assertFalse(Thread.interrupted());
334	>	}});
335	>
336	>	await(pleaseTake);
337	>	assertEquals(0, q.remainingCapacity());
338	>	assertEquals(0, q.take());
339	>
340	>	await(pleaseInterrupt);
341	>	assertThreadStaysAlive(t);
342	>	t.interrupt();
343	>	awaitTermination(t);
344	>	assertEquals(0, q.remainingCapacity());
345		}
346
347	<	public void testTakeFromEmpty() {
347	>	/**
348	>	* timed offer times out if full and elements not taken
349	>	*/
350	>	public void testTimedOffer() throws InterruptedException {
351		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
352	<	Thread t = new Thread(new Runnable() {
353	<	public void run(){
354	<	try {
355	<	q.take();
356	<	threadFail("Should block");
357	<	} catch (InterruptedException success){ }
358	<	}
359	<	});
360	<	try {
361	<	t.start();
362	<	Thread.sleep(SHORT_DELAY_MS);
363	<	t.interrupt();
364	<	t.join();
365	<	} catch (Exception e){
366	<	fail("Unexpected exception");
367	<	}
352	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
353	>	Thread t = newStartedThread(new CheckedRunnable() {
354	>	public void realRun() throws InterruptedException {
355	>	q.put(new Object());
356	>	q.put(new Object());
357	>	long startTime = System.nanoTime();
358	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
359	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
360	>	pleaseInterrupt.countDown();
361	>	try {
362	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
363	>	shouldThrow();
364	>	} catch (InterruptedException success) {}
365	>	}});
366	>
367	>	await(pleaseInterrupt);
368	>	assertThreadStaysAlive(t);
369	>	t.interrupt();
370	>	awaitTermination(t);
371		}
372
373	<	public void testBlockingTake(){
374	<	Thread t = new Thread(new Runnable() {
375	<	public void run() {
376	<	try {
377	<	ArrayBlockingQueue q = populatedQueue(SIZE);
378	<	for (int i = 0; i < SIZE; ++i) {
379	<	threadAssertEquals(i, ((Integer)q.take()).intValue());
356	<	}
357	<	q.take();
358	<	threadFail("take should block");
359	<	} catch (InterruptedException success){
360	<	}
361	<	}});
362	<	try {
363	<	t.start();
364	<	Thread.sleep(SHORT_DELAY_MS);
365	<	t.interrupt();
366	<	t.join();
367	<	}
368	<	catch (InterruptedException ie) {
369	<	fail("Unexpected exception");
373	>	/**
374	>	* take retrieves elements in FIFO order
375	>	*/
376	>	public void testTake() throws InterruptedException {
377	>	ArrayBlockingQueue q = populatedQueue(SIZE);
378	>	for (int i = 0; i < SIZE; ++i) {
379	>	assertEquals(i, q.take());
380		}
381		}
382
383	+	/**
384	+	* Take removes existing elements until empty, then blocks interruptibly
385	+	*/
386	+	public void testBlockingTake() throws InterruptedException {
387	+	final ArrayBlockingQueue q = populatedQueue(SIZE);
388	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
389	+	Thread t = newStartedThread(new CheckedRunnable() {
390	+	public void realRun() throws InterruptedException {
391	+	for (int i = 0; i < SIZE; ++i) {
392	+	assertEquals(i, q.take());
393	+	}
394	+
395	+	Thread.currentThread().interrupt();
396	+	try {
397	+	q.take();
398	+	shouldThrow();
399	+	} catch (InterruptedException success) {}
400	+	assertFalse(Thread.interrupted());
401
402	<	public void testPoll(){
402	>	pleaseInterrupt.countDown();
403	>	try {
404	>	q.take();
405	>	shouldThrow();
406	>	} catch (InterruptedException success) {}
407	>	assertFalse(Thread.interrupted());
408	>	}});
409	>
410	>	await(pleaseInterrupt);
411	>	assertThreadStaysAlive(t);
412	>	t.interrupt();
413	>	awaitTermination(t);
414	>	}
415	>
416	>	/**
417	>	* poll succeeds unless empty
418	>	*/
419	>	public void testPoll() {
420		ArrayBlockingQueue q = populatedQueue(SIZE);
421		for (int i = 0; i < SIZE; ++i) {
422	<	assertEquals(i, ((Integer)q.poll()).intValue());
422	>	assertEquals(i, q.poll());
423		}
424	<	assertNull(q.poll());
424	>	assertNull(q.poll());
425		}
426
427	<	public void testTimedPoll0() {
428	<	try {
429	<	ArrayBlockingQueue q = populatedQueue(SIZE);
430	<	for (int i = 0; i < SIZE; ++i) {
431	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
432	<	}
433	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
434	<	} catch (InterruptedException e){
435	<	fail("Unexpected exception");
436	<	}
427	>	/**
428	>	* timed poll with zero timeout succeeds when non-empty, else times out
429	>	*/
430	>	public void testTimedPoll0() throws InterruptedException {
431	>	ArrayBlockingQueue q = populatedQueue(SIZE);
432	>	for (int i = 0; i < SIZE; ++i) {
433	>	assertEquals(i, q.poll(0, MILLISECONDS));
434	>	}
435	>	assertNull(q.poll(0, MILLISECONDS));
436	>	checkEmpty(q);
437		}
438
439	<	public void testTimedPoll() {
440	<	try {
441	<	ArrayBlockingQueue q = populatedQueue(SIZE);
442	<	for (int i = 0; i < SIZE; ++i) {
443	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
444	<	}
445	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
446	<	} catch (InterruptedException e){
447	<	fail("Unexpected exception");
448	<	}
449	<	}
450	<
451	<	public void testInterruptedTimedPoll(){
452	<	Thread t = new Thread(new Runnable() {
408	<	public void run() {
409	<	try {
410	<	ArrayBlockingQueue q = populatedQueue(SIZE);
411	<	for (int i = 0; i < SIZE; ++i) {
412	<	threadAssertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
413	<	}
414	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
415	<	} catch (InterruptedException success){
416	<	}
417	<	}});
418	<	try {
419	<	t.start();
420	<	Thread.sleep(SHORT_DELAY_MS);
421	<	t.interrupt();
422	<	t.join();
423	<	}
424	<	catch (InterruptedException ie) {
425	<	fail("Unexpected exception");
426	<	}
439	>	/**
440	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
441	>	*/
442	>	public void testTimedPoll() throws InterruptedException {
443	>	ArrayBlockingQueue q = populatedQueue(SIZE);
444	>	for (int i = 0; i < SIZE; ++i) {
445	>	long startTime = System.nanoTime();
446	>	assertEquals(i, q.poll(LONG_DELAY_MS, MILLISECONDS));
447	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
448	>	}
449	>	long startTime = System.nanoTime();
450	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
451	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
452	>	checkEmpty(q);
453		}
454
455	<	public void testTimedPollWithOffer(){
456	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
457	<	Thread t = new Thread(new Runnable() {
458	<	public void run(){
459	<	try {
460	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
461	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
462	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
463	<	threadFail("Should block");
464	<	} catch (InterruptedException success) { }
455	>	/**
456	>	* Interrupted timed poll throws InterruptedException instead of
457	>	* returning timeout status
458	>	*/
459	>	public void testInterruptedTimedPoll() throws InterruptedException {
460	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
461	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
462	>	Thread t = newStartedThread(new CheckedRunnable() {
463	>	public void realRun() throws InterruptedException {
464	>	long startTime = System.nanoTime();
465	>	for (int i = 0; i < SIZE; ++i) {
466	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
467		}
468	<	});
469	<	try {
470	<	t.start();
471	<	Thread.sleep(SMALL_DELAY_MS);
472	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
473	<	t.interrupt();
474	<	t.join();
475	<	} catch (Exception e){
476	<	fail("Unexpected exception");
477	<	}
478	<	}
479	<
468	>	aboutToWait.countDown();
469	>	try {
470	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
471	>	shouldThrow();
472	>	} catch (InterruptedException success) {
473	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
474	>	}
475	>	}});
476	>
477	>	await(aboutToWait);
478	>	waitForThreadToEnterWaitState(t);
479	>	t.interrupt();
480	>	awaitTermination(t);
481	>	checkEmpty(q);
482	>	}
483
484	<	public void testPeek(){
484	>	/**
485	>	* peek returns next element, or null if empty
486	>	*/
487	>	public void testPeek() {
488		ArrayBlockingQueue q = populatedQueue(SIZE);
489		for (int i = 0; i < SIZE; ++i) {
490	<	assertEquals(i, ((Integer)q.peek()).intValue());
491	<	q.poll();
490	>	assertEquals(i, q.peek());
491	>	assertEquals(i, q.poll());
492		assertTrue(q.peek() == null ||
493	<	i != ((Integer)q.peek()).intValue());
493	>	!q.peek().equals(i));
494		}
495	<	assertNull(q.peek());
495	>	assertNull(q.peek());
496		}
497
498	<	public void testElement(){
498	>	/**
499	>	* element returns next element, or throws NSEE if empty
500	>	*/
501	>	public void testElement() {
502		ArrayBlockingQueue q = populatedQueue(SIZE);
503		for (int i = 0; i < SIZE; ++i) {
504	<	assertEquals(i, ((Integer)q.element()).intValue());
505	<	q.poll();
504	>	assertEquals(i, q.element());
505	>	assertEquals(i, q.poll());
506		}
507		try {
508		q.element();
509	<	fail("no such element");
510	<	}
474	<	catch (NoSuchElementException success) {}
509	>	shouldThrow();
510	>	} catch (NoSuchElementException success) {}
511		}
512
513	<	public void testRemove(){
513	>	/**
514	>	* remove removes next element, or throws NSEE if empty
515	>	*/
516	>	public void testRemove() {
517		ArrayBlockingQueue q = populatedQueue(SIZE);
518		for (int i = 0; i < SIZE; ++i) {
519	<	assertEquals(i, ((Integer)q.remove()).intValue());
519	>	assertEquals(i, q.remove());
520		}
521		try {
522		q.remove();
523	<	fail("remove should throw");
524	<	} catch (NoSuchElementException success){
486	<	}
523	>	shouldThrow();
524	>	} catch (NoSuchElementException success) {}
525		}
526
527	<	public void testRemoveElement(){
528	<	ArrayBlockingQueue q = populatedQueue(SIZE);
529	<	for (int i = 1; i < SIZE; i+=2) {
530	<	assertTrue(q.remove(new Integer(i)));
493	<	}
494	<	for (int i = 0; i < SIZE; i+=2) {
495	<	assertTrue(q.remove(new Integer(i)));
496	<	assertFalse(q.remove(new Integer(i+1)));
497	<	}
498	<	assertTrue(q.isEmpty());
499	<	}
500	<
501	<	public void testContains(){
527	>	/**
528	>	* contains(x) reports true when elements added but not yet removed
529	>	*/
530	>	public void testContains() {
531		ArrayBlockingQueue q = populatedQueue(SIZE);
532		for (int i = 0; i < SIZE; ++i) {
533		assertTrue(q.contains(new Integer(i)));
534	<	q.poll();
534	>	assertEquals(i, q.poll());
535		assertFalse(q.contains(new Integer(i)));
536		}
537		}
538
539	<	public void testClear(){
539	>	/**
540	>	* clear removes all elements
541	>	*/
542	>	public void testClear() {
543		ArrayBlockingQueue q = populatedQueue(SIZE);
544		q.clear();
545		assertTrue(q.isEmpty());
#	Line 515 | Line 547 | public class ArrayBlockingQueueTest exte
547		assertEquals(SIZE, q.remainingCapacity());
548		q.add(one);
549		assertFalse(q.isEmpty());
550	+	assertTrue(q.contains(one));
551		q.clear();
552		assertTrue(q.isEmpty());
553		}
554
555	<	public void testContainsAll(){
555	>	/**
556	>	* containsAll(c) is true when c contains a subset of elements
557	>	*/
558	>	public void testContainsAll() {
559		ArrayBlockingQueue q = populatedQueue(SIZE);
560		ArrayBlockingQueue p = new ArrayBlockingQueue(SIZE);
561		for (int i = 0; i < SIZE; ++i) {
#	Line 530 | Line 566 | public class ArrayBlockingQueueTest exte
566		assertTrue(p.containsAll(q));
567		}
568
569	<	public void testRetainAll(){
569	>	/**
570	>	* retainAll(c) retains only those elements of c and reports true if changed
571	>	*/
572	>	public void testRetainAll() {
573		ArrayBlockingQueue q = populatedQueue(SIZE);
574		ArrayBlockingQueue p = populatedQueue(SIZE);
575		for (int i = 0; i < SIZE; ++i) {
#	Line 541 | Line 580 | public class ArrayBlockingQueueTest exte
580		assertTrue(changed);
581
582		assertTrue(q.containsAll(p));
583	<	assertEquals(SIZE-i, q.size());
583	>	assertEquals(SIZE - i, q.size());
584		p.remove();
585		}
586		}
587
588	<	public void testRemoveAll(){
588	>	/**
589	>	* removeAll(c) removes only those elements of c and reports true if changed
590	>	*/
591	>	public void testRemoveAll() {
592		for (int i = 1; i < SIZE; ++i) {
593		ArrayBlockingQueue q = populatedQueue(SIZE);
594		ArrayBlockingQueue p = populatedQueue(i);
595		assertTrue(q.removeAll(p));
596	<	assertEquals(SIZE-i, q.size());
596	>	assertEquals(SIZE - i, q.size());
597		for (int j = 0; j < i; ++j) {
598	<	Integer I = (Integer)(p.remove());
599	<	assertFalse(q.contains(I));
598	>	Integer x = (Integer)(p.remove());
599	>	assertFalse(q.contains(x));
600		}
601		}
602		}
603
604	+	void checkToArray(ArrayBlockingQueue<Integer> q) {
605	+	int size = q.size();
606	+	Object[] a1 = q.toArray();
607	+	assertEquals(size, a1.length);
608	+	Integer[] a2 = q.toArray(new Integer[0]);
609	+	assertEquals(size, a2.length);
610	+	Integer[] a3 = q.toArray(new Integer[Math.max(0, size - 1)]);
611	+	assertEquals(size, a3.length);
612	+	Integer[] a4 = new Integer[size];
613	+	assertSame(a4, q.toArray(a4));
614	+	Integer[] a5 = new Integer[size + 1];
615	+	Arrays.fill(a5, 42);
616	+	assertSame(a5, q.toArray(a5));
617	+	Integer[] a6 = new Integer[size + 2];
618	+	Arrays.fill(a6, 42);
619	+	assertSame(a6, q.toArray(a6));
620	+	Object[][] as = { a1, a2, a3, a4, a5, a6 };
621	+	for (Object[] a : as) {
622	+	if (a.length > size) assertNull(a[size]);
623	+	if (a.length > size + 1) assertEquals(42, a[size + 1]);
624	+	}
625	+	Iterator it = q.iterator();
626	+	Integer s = q.peek();
627	+	for (int i = 0; i < size; i++) {
628	+	Integer x = (Integer) it.next();
629	+	assertEquals(s + i, (int) x);
630	+	for (Object[] a : as)
631	+	assertSame(a1[i], x);
632	+	}
633	+	}
634
635	<	public void testToArray(){
635	>	/**
636	>	* toArray() and toArray(a) contain all elements in FIFO order
637	>	*/
638	>	public void testToArray() {
639	>	final ThreadLocalRandom rnd = ThreadLocalRandom.current();
640	>	final int size = rnd.nextInt(6);
641	>	final int capacity = Math.max(1, size + rnd.nextInt(size + 1));
642	>	ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<>(capacity);
643	>	for (int i = 0; i < size; i++) {
644	>	checkToArray(q);
645	>	q.add(i);
646	>	}
647	>	// Provoke wraparound
648	>	int added = size * 2;
649	>	for (int i = 0; i < added; i++) {
650	>	checkToArray(q);
651	>	assertEquals((Integer) i, q.poll());
652	>	q.add(size + i);
653	>	}
654	>	for (int i = 0; i < size; i++) {
655	>	checkToArray(q);
656	>	assertEquals((Integer) (added + i), q.poll());
657	>	}
658	>	}
659	>
660	>	/**
661	>	* toArray(incompatible array type) throws ArrayStoreException
662	>	*/
663	>	public void testToArray_incompatibleArrayType() {
664		ArrayBlockingQueue q = populatedQueue(SIZE);
665	<	Object[] o = q.toArray();
666	<	try {
667	<	for(int i = 0; i < o.length; i++)
668	<	assertEquals(o[i], q.take());
669	<	} catch (InterruptedException e){
670	<	fail("Unexpected exception");
671	<	}
672	<	}
573	<
574	<	public void testToArray2(){
575	<	ArrayBlockingQueue q = populatedQueue(SIZE);
576	<	Integer[] ints = new Integer[SIZE];
577	<	ints = (Integer[])q.toArray(ints);
578	<	try {
579	<	for(int i = 0; i < ints.length; i++)
580	<	assertEquals(ints[i], q.take());
581	<	} catch (InterruptedException e){
582	<	fail("Unexpected exception");
583	<	}
584	<	}
585	<
586	<	public void testIterator(){
587	<	ArrayBlockingQueue q = populatedQueue(SIZE);
588	<	Iterator it = q.iterator();
589	<	try {
590	<	while(it.hasNext()){
591	<	assertEquals(it.next(), q.take());
592	<	}
593	<	} catch (InterruptedException e){
594	<	fail("Unexpected exception");
595	<	}
665	>	try {
666	>	q.toArray(new String[10]);
667	>	shouldThrow();
668	>	} catch (ArrayStoreException success) {}
669	>	try {
670	>	q.toArray(new String[0]);
671	>	shouldThrow();
672	>	} catch (ArrayStoreException success) {}
673		}
674
675	<	public void testIteratorOrdering() {
675	>	/**
676	>	* iterator iterates through all elements
677	>	*/
678	>	public void testIterator() throws InterruptedException {
679	>	ArrayBlockingQueue q = populatedQueue(SIZE);
680	>	Iterator it = q.iterator();
681	>	int i;
682	>	for (i = 0; it.hasNext(); i++)
683	>	assertTrue(q.contains(it.next()));
684	>	assertEquals(i, SIZE);
685	>	assertIteratorExhausted(it);
686	>
687	>	it = q.iterator();
688	>	for (i = 0; it.hasNext(); i++)
689	>	assertEquals(it.next(), q.take());
690	>	assertEquals(i, SIZE);
691	>	assertIteratorExhausted(it);
692	>	}
693
694	+	/**
695	+	* iterator of empty collection has no elements
696	+	*/
697	+	public void testEmptyIterator() {
698	+	assertIteratorExhausted(new ArrayBlockingQueue(SIZE).iterator());
699	+	}
700	+
701	+	/**
702	+	* iterator.remove removes current element
703	+	*/
704	+	public void testIteratorRemove() {
705		final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
706	+	q.add(two);
707	+	q.add(one);
708	+	q.add(three);
709	+
710	+	Iterator it = q.iterator();
711	+	it.next();
712	+	it.remove();
713	+
714	+	it = q.iterator();
715	+	assertSame(it.next(), one);
716	+	assertSame(it.next(), three);
717	+	assertFalse(it.hasNext());
718	+	}
719
720	+	/**
721	+	* iterator ordering is FIFO
722	+	*/
723	+	public void testIteratorOrdering() {
724	+	final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
725		q.add(one);
726		q.add(two);
727		q.add(three);
#	Line 607 | Line 730 | public class ArrayBlockingQueueTest exte
730
731		int k = 0;
732		for (Iterator it = q.iterator(); it.hasNext();) {
733	<	int i = ((Integer)(it.next())).intValue();
611	<	assertEquals("items should come out in order", ++k, i);
733	>	assertEquals(++k, it.next());
734		}
735	<
614	<	assertEquals("should go through 3 elements", 3, k);
735	>	assertEquals(3, k);
736		}
737
738	<	public void testWeaklyConsistentIteration () {
739	<
738	>	/**
739	>	* Modifications do not cause iterators to fail
740	>	*/
741	>	public void testWeaklyConsistentIteration() {
742		final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
620	–
743		q.add(one);
744		q.add(two);
745		q.add(three);
746	<
747	<	try {
748	<	for (Iterator it = q.iterator(); it.hasNext();) {
627	<	q.remove();
628	<	it.next();
629	<	}
630	<	}
631	<	catch (ConcurrentModificationException e) {
632	<	fail("weakly consistent iterator; should not get CME");
746	>	for (Iterator it = q.iterator(); it.hasNext();) {
747	>	q.remove();
748	>	it.next();
749		}
750	<
635	<	assertEquals("queue should be empty again", 0, q.size());
750	>	assertEquals(0, q.size());
751		}
752
753	<
754	<	public void testToString(){
753	>	/**
754	>	* toString contains toStrings of elements
755	>	*/
756	>	public void testToString() {
757		ArrayBlockingQueue q = populatedQueue(SIZE);
758		String s = q.toString();
759		for (int i = 0; i < SIZE; ++i) {
760	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
760	>	assertTrue(s.contains(String.valueOf(i)));
761		}
762	<	}
646	<
762	>	}
763
764	+	/**
765	+	* offer transfers elements across Executor tasks
766	+	*/
767		public void testOfferInExecutor() {
649	–
768		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
651	–
769		q.add(one);
770		q.add(two);
771	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
772	+	final ExecutorService executor = Executors.newFixedThreadPool(2);
773	+	try (PoolCleaner cleaner = cleaner(executor)) {
774	+	executor.execute(new CheckedRunnable() {
775	+	public void realRun() throws InterruptedException {
776	+	assertFalse(q.offer(three));
777	+	threadsStarted.await();
778	+	assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS));
779	+	assertEquals(0, q.remainingCapacity());
780	+	}});
781
782	<	ExecutorService executor = Executors.newFixedThreadPool(2);
783	<
784	<	executor.execute(new Runnable() {
785	<	public void run() {
786	<	threadAssertFalse(q.offer(three));
787	<	try {
788	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
662	<	threadAssertEquals(0, q.remainingCapacity());
663	<	}
664	<	catch (InterruptedException e) {
665	<	threadFail("should not be interrupted");
666	<	}
667	<	}
668	<	});
669	<
670	<	executor.execute(new Runnable() {
671	<	public void run() {
672	<	try {
673	<	Thread.sleep(SMALL_DELAY_MS);
674	<	threadAssertEquals(one, q.take());
675	<	}
676	<	catch (InterruptedException e) {
677	<	threadFail("should not be interrupted");
678	<	}
679	<	}
680	<	});
681	<
682	<	joinPool(executor);
683	<
782	>	executor.execute(new CheckedRunnable() {
783	>	public void realRun() throws InterruptedException {
784	>	threadsStarted.await();
785	>	assertEquals(0, q.remainingCapacity());
786	>	assertSame(one, q.take());
787	>	}});
788	>	}
789		}
790
791	+	/**
792	+	* timed poll retrieves elements across Executor threads
793	+	*/
794		public void testPollInExecutor() {
687	–
795		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
796	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
797	+	final ExecutorService executor = Executors.newFixedThreadPool(2);
798	+	try (PoolCleaner cleaner = cleaner(executor)) {
799	+	executor.execute(new CheckedRunnable() {
800	+	public void realRun() throws InterruptedException {
801	+	assertNull(q.poll());
802	+	threadsStarted.await();
803	+	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
804	+	checkEmpty(q);
805	+	}});
806
807	<	ExecutorService executor = Executors.newFixedThreadPool(2);
808	<
809	<	executor.execute(new Runnable() {
693	<	public void run() {
694	<	threadAssertNull(q.poll());
695	<	try {
696	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
697	<	threadAssertTrue(q.isEmpty());
698	<	}
699	<	catch (InterruptedException e) {
700	<	threadFail("should not be interrupted");
701	<	}
702	<	}
703	<	});
704	<
705	<	executor.execute(new Runnable() {
706	<	public void run() {
707	<	try {
708	<	Thread.sleep(SMALL_DELAY_MS);
807	>	executor.execute(new CheckedRunnable() {
808	>	public void realRun() throws InterruptedException {
809	>	threadsStarted.await();
810		q.put(one);
811	<	}
812	<	catch (InterruptedException e) {
813	<	threadFail("should not be interrupted");
713	<	}
714	<	}
715	<	});
716	<
717	<	joinPool(executor);
811	>	}});
812	>	}
813	>	}
814
815	+	/**
816	+	* A deserialized serialized queue has same elements in same order
817	+	*/
818	+	public void testSerialization() throws Exception {
819	+	Queue x = populatedQueue(SIZE);
820	+	Queue y = serialClone(x);
821	+
822	+	assertNotSame(x, y);
823	+	assertEquals(x.size(), y.size());
824	+	assertEquals(x.toString(), y.toString());
825	+	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
826	+	while (!x.isEmpty()) {
827	+	assertFalse(y.isEmpty());
828	+	assertEquals(x.remove(), y.remove());
829	+	}
830	+	assertTrue(y.isEmpty());
831		}
832
833	<	public void testSerialization() {
833	>	/**
834	>	* drainTo(c) empties queue into another collection c
835	>	*/
836	>	public void testDrainTo() {
837		ArrayBlockingQueue q = populatedQueue(SIZE);
838	+	ArrayList l = new ArrayList();
839	+	q.drainTo(l);
840	+	assertEquals(0, q.size());
841	+	assertEquals(SIZE, l.size());
842	+	for (int i = 0; i < SIZE; ++i)
843	+	assertEquals(l.get(i), new Integer(i));
844	+	q.add(zero);
845	+	q.add(one);
846	+	assertFalse(q.isEmpty());
847	+	assertTrue(q.contains(zero));
848	+	assertTrue(q.contains(one));
849	+	l.clear();
850	+	q.drainTo(l);
851	+	assertEquals(0, q.size());
852	+	assertEquals(2, l.size());
853	+	for (int i = 0; i < 2; ++i)
854	+	assertEquals(l.get(i), new Integer(i));
855	+	}
856
857	<	try {
858	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
859	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
860	<	out.writeObject(q);
861	<	out.close();
857	>	/**
858	>	* drainTo empties full queue, unblocking a waiting put.
859	>	*/
860	>	public void testDrainToWithActivePut() throws InterruptedException {
861	>	final ArrayBlockingQueue q = populatedQueue(SIZE);
862	>	Thread t = new Thread(new CheckedRunnable() {
863	>	public void realRun() throws InterruptedException {
864	>	q.put(new Integer(SIZE + 1));
865	>	}});
866	>
867	>	t.start();
868	>	ArrayList l = new ArrayList();
869	>	q.drainTo(l);
870	>	assertTrue(l.size() >= SIZE);
871	>	for (int i = 0; i < SIZE; ++i)
872	>	assertEquals(l.get(i), new Integer(i));
873	>	t.join();
874	>	assertTrue(q.size() + l.size() >= SIZE);
875	>	}
876
877	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
878	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
879	<	ArrayBlockingQueue r = (ArrayBlockingQueue)in.readObject();
880	<	assertEquals(q.size(), r.size());
881	<	while (!q.isEmpty())
882	<	assertEquals(q.remove(), r.remove());
883	<	} catch(Exception e){
884	<	fail("unexpected exception");
877	>	/**
878	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
879	>	*/
880	>	public void testDrainToN() {
881	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE * 2);
882	>	for (int i = 0; i < SIZE + 2; ++i) {
883	>	for (int j = 0; j < SIZE; j++)
884	>	assertTrue(q.offer(new Integer(j)));
885	>	ArrayList l = new ArrayList();
886	>	q.drainTo(l, i);
887	>	int k = (i < SIZE) ? i : SIZE;
888	>	assertEquals(k, l.size());
889	>	assertEquals(SIZE - k, q.size());
890	>	for (int j = 0; j < k; ++j)
891	>	assertEquals(l.get(j), new Integer(j));
892	>	do {} while (q.poll() != null);
893		}
894		}
895
896	<
896	>	/**
897	>	* remove(null), contains(null) always return false
898	>	*/
899	>	public void testNeverContainsNull() {
900	>	Collection<?>[] qs = {
901	>	new ArrayBlockingQueue<Object>(10),
902	>	populatedQueue(2),
903	>	};
904	>
905	>	for (Collection<?> q : qs) {
906	>	assertFalse(q.contains(null));
907	>	assertFalse(q.remove(null));
908	>	}
909	>	}
910		}

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