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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 1.76 by jsr166, Sun Nov 6 02:40:38 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 void main(String[] args) {
29	<	junit.textui.TestRunner.run (suite());
29	>	main(suite(), args);
30		}
31
32		public static Test suite() {
33	<	return new TestSuite(ArrayBlockingQueueTest.class);
33	>	class Implementation implements CollectionImplementation {
34	>	public Class<?> klazz() { return ArrayBlockingQueue.class; }
35	>	public Collection emptyCollection() {
36	>	boolean fair = ThreadLocalRandom.current().nextBoolean();
37	>	return populatedQueue(0, SIZE, 2 * SIZE, fair);
38	>	}
39	>	public Object makeElement(int i) { return i; }
40	>	public boolean isConcurrent() { return true; }
41	>	public boolean permitsNulls() { return false; }
42	>	}
43	>
44	>	return newTestSuite(
45	>	ArrayBlockingQueueTest.class,
46	>	new Fair().testSuite(),
47	>	new NonFair().testSuite(),
48	>	CollectionTest.testSuite(new Implementation()));
49	>	}
50	>
51	>	public static class Fair extends BlockingQueueTest {
52	>	protected BlockingQueue emptyCollection() {
53	>	return populatedQueue(0, SIZE, 2 * SIZE, true);
54	>	}
55	>	}
56	>
57	>	public static class NonFair extends BlockingQueueTest {
58	>	protected BlockingQueue emptyCollection() {
59	>	return populatedQueue(0, SIZE, 2 * SIZE, false);
60	>	}
61	>	}
62	>
63	>	/**
64	>	* Returns a new queue of given size containing consecutive
65	>	* Integers 0 ... n - 1.
66	>	*/
67	>	static ArrayBlockingQueue<Integer> populatedQueue(int n) {
68	>	return populatedQueue(n, n, n, false);
69		}
70
71		/**
72	<	* Create a queue of given size containing consecutive
73	<	* Integers 0 ... n.
72	>	* Returns a new queue of given size containing consecutive
73	>	* Integers 0 ... n - 1, with given capacity range and fairness.
74		*/
75	<	private ArrayBlockingQueue populatedQueue(int n) {
76	<	ArrayBlockingQueue q = new ArrayBlockingQueue(n);
75	>	static ArrayBlockingQueue<Integer> populatedQueue(
76	>	int size, int minCapacity, int maxCapacity, boolean fair) {
77	>	ThreadLocalRandom rnd = ThreadLocalRandom.current();
78	>	int capacity = rnd.nextInt(minCapacity, maxCapacity + 1);
79	>	ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<>(capacity);
80		assertTrue(q.isEmpty());
81	<	for(int i = 0; i < n; i++)
82	<	assertTrue(q.offer(new Integer(i)));
83	<	assertFalse(q.isEmpty());
84	<	assertEquals(0, q.remainingCapacity());
85	<	assertEquals(n, q.size());
81	>	// shuffle circular array elements so they wrap
82	>	{
83	>	int n = rnd.nextInt(capacity);
84	>	for (int i = 0; i < n; i++) q.add(42);
85	>	for (int i = 0; i < n; i++) q.remove();
86	>	}
87	>	for (int i = 0; i < size; i++)
88	>	assertTrue(q.offer((Integer) i));
89	>	assertEquals(size == 0, q.isEmpty());
90	>	assertEquals(capacity - size, q.remainingCapacity());
91	>	assertEquals(size, q.size());
92	>	if (size > 0)
93	>	assertEquals((Integer) 0, q.peek());
94		return q;
95		}
96	<
97	<	public void testConstructor1(){
96	>
97	>	/**
98	>	* A new queue has the indicated capacity
99	>	*/
100	>	public void testConstructor1() {
101		assertEquals(SIZE, new ArrayBlockingQueue(SIZE).remainingCapacity());
102		}
103
104	<	public void testConstructor2(){
104	>	/**
105	>	* Constructor throws IAE if capacity argument nonpositive
106	>	*/
107	>	public void testConstructor2() {
108		try {
109	<	ArrayBlockingQueue q = new ArrayBlockingQueue(0);
110	<	fail("Cannot make zero-sized");
111	<	}
47	<	catch (IllegalArgumentException success) {}
109	>	new ArrayBlockingQueue(0);
110	>	shouldThrow();
111	>	} catch (IllegalArgumentException success) {}
112		}
113
114	<	public void testConstructor3(){
115	<
114	>	/**
115	>	* Initializing from null Collection throws NPE
116	>	*/
117	>	public void testConstructor3() {
118		try {
119	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1, true, null);
120	<	fail("Cannot make from null collection");
121	<	}
56	<	catch (NullPointerException success) {}
119	>	new ArrayBlockingQueue(1, true, null);
120	>	shouldThrow();
121	>	} catch (NullPointerException success) {}
122		}
123
124	<	public void testConstructor4(){
124	>	/**
125	>	* Initializing from Collection of null elements throws NPE
126	>	*/
127	>	public void testConstructor4() {
128	>	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
129		try {
130	<	Integer[] ints = new Integer[SIZE];
131	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
132	<	fail("Cannot make with null elements");
64	<	}
65	<	catch (NullPointerException success) {}
130	>	new ArrayBlockingQueue(SIZE, false, elements);
131	>	shouldThrow();
132	>	} catch (NullPointerException success) {}
133		}
134
135	<	public void testConstructor5(){
136	<	try {
137	<	Integer[] ints = new Integer[SIZE];
138	<	for (int i = 0; i < SIZE-1; ++i)
139	<	ints[i] = new Integer(i);
140	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
141	<	fail("Cannot make with null elements");
142	<	}
143	<	catch (NullPointerException success) {}
135	>	/**
136	>	* Initializing from Collection with some null elements throws NPE
137	>	*/
138	>	public void testConstructor5() {
139	>	Integer[] ints = new Integer[SIZE];
140	>	for (int i = 0; i < SIZE - 1; ++i)
141	>	ints[i] = i;
142	>	Collection<Integer> elements = Arrays.asList(ints);
143	>	try {
144	>	new ArrayBlockingQueue(SIZE, false, elements);
145	>	shouldThrow();
146	>	} catch (NullPointerException success) {}
147		}
148
149	<	public void testConstructor6(){
150	<	try {
151	<	Integer[] ints = new Integer[SIZE];
152	<	for (int i = 0; i < SIZE; ++i)
153	<	ints[i] = new Integer(i);
154	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1, false, Arrays.asList(ints));
155	<	fail("Cannot make with insufficient capacity");
156	<	}
157	<	catch (IllegalArgumentException success) {}
149	>	/**
150	>	* Initializing from too large collection throws IAE
151	>	*/
152	>	public void testConstructor6() {
153	>	Integer[] ints = new Integer[SIZE];
154	>	for (int i = 0; i < SIZE; ++i)
155	>	ints[i] = i;
156	>	Collection<Integer> elements = Arrays.asList(ints);
157	>	try {
158	>	new ArrayBlockingQueue(SIZE - 1, false, elements);
159	>	shouldThrow();
160	>	} catch (IllegalArgumentException success) {}
161		}
162
163	<	public void testConstructor7(){
164	<	try {
165	<	Integer[] ints = new Integer[SIZE];
166	<	for (int i = 0; i < SIZE; ++i)
167	<	ints[i] = new Integer(i);
168	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, true, Arrays.asList(ints));
169	<	for (int i = 0; i < SIZE; ++i)
170	<	assertEquals(ints[i], q.poll());
171	<	}
172	<	finally {}
163	>	/**
164	>	* Queue contains all elements of collection used to initialize
165	>	*/
166	>	public void testConstructor7() {
167	>	Integer[] ints = new Integer[SIZE];
168	>	for (int i = 0; i < SIZE; ++i)
169	>	ints[i] = i;
170	>	Collection<Integer> elements = Arrays.asList(ints);
171	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, true, elements);
172	>	for (int i = 0; i < SIZE; ++i)
173	>	assertEquals(ints[i], q.poll());
174		}
175
176	+	/**
177	+	* Queue transitions from empty to full when elements added
178	+	*/
179		public void testEmptyFull() {
180		ArrayBlockingQueue q = new ArrayBlockingQueue(2);
181		assertTrue(q.isEmpty());
182	<	assertEquals("should have room for 2", 2, q.remainingCapacity());
182	>	assertEquals(2, q.remainingCapacity());
183		q.add(one);
184		assertFalse(q.isEmpty());
185		q.add(two);
186		assertFalse(q.isEmpty());
187	<	assertEquals("queue should be full", 0, q.remainingCapacity());
188	<	assertFalse("offer should be rejected", q.offer(three));
187	>	assertEquals(0, q.remainingCapacity());
188	>	assertFalse(q.offer(three));
189		}
190
191	<	public void testRemainingCapacity(){
192	<	ArrayBlockingQueue q = populatedQueue(SIZE);
191	>	/**
192	>	* remainingCapacity decreases on add, increases on remove
193	>	*/
194	>	public void testRemainingCapacity() {
195	>	BlockingQueue q = populatedQueue(SIZE);
196		for (int i = 0; i < SIZE; ++i) {
197		assertEquals(i, q.remainingCapacity());
198	<	assertEquals(SIZE-i, q.size());
199	<	q.remove();
198	>	assertEquals(SIZE, q.size() + q.remainingCapacity());
199	>	assertEquals(i, q.remove());
200		}
201		for (int i = 0; i < SIZE; ++i) {
202	<	assertEquals(SIZE-i, q.remainingCapacity());
203	<	assertEquals(i, q.size());
204	<	q.add(new Integer(i));
202	>	assertEquals(SIZE - i, q.remainingCapacity());
203	>	assertEquals(SIZE, q.size() + q.remainingCapacity());
204	>	assertTrue(q.add(i));
205		}
206		}
207
208	<	public void testOfferNull(){
209	<	try {
210	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
211	<	q.offer(null);
132	<	fail("should throw NPE");
133	<	} catch (NullPointerException success) { }
134	<	}
135	<
136	<	public void testOffer(){
208	>	/**
209	>	* Offer succeeds if not full; fails if full
210	>	*/
211	>	public void testOffer() {
212		ArrayBlockingQueue q = new ArrayBlockingQueue(1);
213		assertTrue(q.offer(zero));
214		assertFalse(q.offer(one));
215		}
216
217	<	public void testAdd(){
218	<	try {
219	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
220	<	for (int i = 0; i < SIZE; ++i) {
221	<	assertTrue(q.add(new Integer(i)));
222	<	}
223	<	assertEquals(0, q.remainingCapacity());
217	>	/**
218	>	* add succeeds if not full; throws ISE if full
219	>	*/
220	>	public void testAdd() {
221	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
222	>	for (int i = 0; i < SIZE; ++i) {
223	>	assertTrue(q.add(new Integer(i)));
224	>	}
225	>	assertEquals(0, q.remainingCapacity());
226	>	try {
227		q.add(new Integer(SIZE));
228	<	} catch (IllegalStateException success){
229	<	}
228	>	shouldThrow();
229	>	} catch (IllegalStateException success) {}
230		}
231
232	<	public void testAddAll1(){
233	<	try {
234	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
235	<	q.addAll(null);
236	<	fail("Cannot add null collection");
159	<	}
160	<	catch (NullPointerException success) {}
161	<	}
162	<	public void testAddAll2(){
232	>	/**
233	>	* addAll(this) throws IAE
234	>	*/
235	>	public void testAddAllSelf() {
236	>	ArrayBlockingQueue q = populatedQueue(SIZE);
237		try {
238	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
239	<	Integer[] ints = new Integer[SIZE];
240	<	q.addAll(Arrays.asList(ints));
167	<	fail("Cannot add null elements");
168	<	}
169	<	catch (NullPointerException success) {}
238	>	q.addAll(q);
239	>	shouldThrow();
240	>	} catch (IllegalArgumentException success) {}
241		}
242	<	public void testAddAll3(){
242	>
243	>	/**
244	>	* addAll of a collection with any null elements throws NPE after
245	>	* possibly adding some elements
246	>	*/
247	>	public void testAddAll3() {
248	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
249	>	Integer[] ints = new Integer[SIZE];
250	>	for (int i = 0; i < SIZE - 1; ++i)
251	>	ints[i] = new Integer(i);
252		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);
253		q.addAll(Arrays.asList(ints));
254	<	fail("Cannot add null elements");
255	<	}
180	<	catch (NullPointerException success) {}
254	>	shouldThrow();
255	>	} catch (NullPointerException success) {}
256		}
257	<	public void testAddAll4(){
257	>
258	>	/**
259	>	* addAll throws ISE if not enough room
260	>	*/
261	>	public void testAddAll4() {
262	>	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
263	>	Integer[] ints = new Integer[SIZE];
264	>	for (int i = 0; i < SIZE; ++i)
265	>	ints[i] = new Integer(i);
266		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);
267		q.addAll(Arrays.asList(ints));
268	<	fail("Cannot add with insufficient capacity");
269	<	}
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	<	}
268	>	shouldThrow();
269	>	} catch (IllegalStateException success) {}
270		}
271
272	<	public void testBlockingPut(){
273	<	Thread t = new Thread(new Runnable() {
274	<	public void run() {
275	<	int added = 0;
276	<	try {
277	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
278	<	for (int i = 0; i < SIZE; ++i) {
279	<	q.put(new Integer(i));
280	<	++added;
281	<	}
282	<	q.put(new Integer(SIZE));
283	<	threadFail("put should block");
284	<	} 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	<	}
272	>	/**
273	>	* Queue contains all elements, in traversal order, of successful addAll
274	>	*/
275	>	public void testAddAll5() {
276	>	Integer[] empty = new Integer[0];
277	>	Integer[] ints = new Integer[SIZE];
278	>	for (int i = 0; i < SIZE; ++i)
279	>	ints[i] = new Integer(i);
280	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
281	>	assertFalse(q.addAll(Arrays.asList(empty)));
282	>	assertTrue(q.addAll(Arrays.asList(ints)));
283	>	for (int i = 0; i < SIZE; ++i)
284	>	assertEquals(ints[i], q.poll());
285		}
286
287	<	public void testPutWithTake() {
288	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
289	<	Thread t = new Thread(new Runnable() {
290	<	public void run(){
291	<	int added = 0;
292	<	try {
293	<	q.put(new Object());
294	<	++added;
295	<	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");
287	>	/**
288	>	* all elements successfully put are contained
289	>	*/
290	>	public void testPut() throws InterruptedException {
291	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
292	>	for (int i = 0; i < SIZE; ++i) {
293	>	Integer x = new Integer(i);
294	>	q.put(x);
295	>	assertTrue(q.contains(x));
296		}
297	+	assertEquals(0, q.remainingCapacity());
298		}
299
300	<	public void testTimedOffer() {
301	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
302	<	Thread t = new Thread(new Runnable() {
303	<	public void run(){
304	<	try {
305	<	q.put(new Object());
306	<	q.put(new Object());
307	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
308	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
309	<	threadFail("Should block");
310	<	} catch (InterruptedException success){}
311	<	}
312	<	});
313	<
314	<	try {
315	<	t.start();
316	<	Thread.sleep(SHORT_DELAY_MS);
317	<	t.interrupt();
318	<	t.join();
319	<	} catch (Exception e){
320	<	fail("Unexpected exception");
321	<	}
300	>	/**
301	>	* put blocks interruptibly if full
302	>	*/
303	>	public void testBlockingPut() throws InterruptedException {
304	>	final ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
305	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
306	>	Thread t = newStartedThread(new CheckedRunnable() {
307	>	public void realRun() throws InterruptedException {
308	>	for (int i = 0; i < SIZE; ++i)
309	>	q.put(i);
310	>	assertEquals(SIZE, q.size());
311	>	assertEquals(0, q.remainingCapacity());
312	>
313	>	Thread.currentThread().interrupt();
314	>	try {
315	>	q.put(99);
316	>	shouldThrow();
317	>	} catch (InterruptedException success) {}
318	>	assertFalse(Thread.interrupted());
319	>
320	>	pleaseInterrupt.countDown();
321	>	try {
322	>	q.put(99);
323	>	shouldThrow();
324	>	} catch (InterruptedException success) {}
325	>	assertFalse(Thread.interrupted());
326	>	}});
327	>
328	>	await(pleaseInterrupt);
329	>	assertThreadStaysAlive(t);
330	>	t.interrupt();
331	>	awaitTermination(t);
332	>	assertEquals(SIZE, q.size());
333	>	assertEquals(0, q.remainingCapacity());
334		}
335
336	<	public void testTake(){
337	<	try {
338	<	ArrayBlockingQueue q = populatedQueue(SIZE);
339	<	for (int i = 0; i < SIZE; ++i) {
340	<	assertEquals(i, ((Integer)q.take()).intValue());
341	<	}
342	<	} catch (InterruptedException e){
343	<	fail("Unexpected exception");
344	<	}
336	>	/**
337	>	* put blocks interruptibly waiting for take when full
338	>	*/
339	>	public void testPutWithTake() throws InterruptedException {
340	>	final int capacity = 2;
341	>	final ArrayBlockingQueue q = new ArrayBlockingQueue(capacity);
342	>	final CountDownLatch pleaseTake = new CountDownLatch(1);
343	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
344	>	Thread t = newStartedThread(new CheckedRunnable() {
345	>	public void realRun() throws InterruptedException {
346	>	for (int i = 0; i < capacity; i++)
347	>	q.put(i);
348	>	pleaseTake.countDown();
349	>	q.put(86);
350	>
351	>	pleaseInterrupt.countDown();
352	>	try {
353	>	q.put(99);
354	>	shouldThrow();
355	>	} catch (InterruptedException success) {}
356	>	assertFalse(Thread.interrupted());
357	>	}});
358	>
359	>	await(pleaseTake);
360	>	assertEquals(0, q.remainingCapacity());
361	>	assertEquals(0, q.take());
362	>
363	>	await(pleaseInterrupt);
364	>	assertThreadStaysAlive(t);
365	>	t.interrupt();
366	>	awaitTermination(t);
367	>	assertEquals(0, q.remainingCapacity());
368		}
369
370	<	public void testTakeFromEmpty() {
370	>	/**
371	>	* timed offer times out if full and elements not taken
372	>	*/
373	>	public void testTimedOffer() throws InterruptedException {
374		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
375	<	Thread t = new Thread(new Runnable() {
376	<	public void run(){
377	<	try {
378	<	q.take();
379	<	threadFail("Should block");
380	<	} catch (InterruptedException success){ }
381	<	}
382	<	});
383	<	try {
384	<	t.start();
385	<	Thread.sleep(SHORT_DELAY_MS);
386	<	t.interrupt();
387	<	t.join();
388	<	} catch (Exception e){
389	<	fail("Unexpected exception");
390	<	}
375	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
376	>	Thread t = newStartedThread(new CheckedRunnable() {
377	>	public void realRun() throws InterruptedException {
378	>	q.put(new Object());
379	>	q.put(new Object());
380	>	long startTime = System.nanoTime();
381	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
382	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
383	>	pleaseInterrupt.countDown();
384	>	try {
385	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
386	>	shouldThrow();
387	>	} catch (InterruptedException success) {}
388	>	}});
389	>
390	>	await(pleaseInterrupt);
391	>	assertThreadStaysAlive(t);
392	>	t.interrupt();
393	>	awaitTermination(t);
394		}
395
396	<	public void testBlockingTake(){
397	<	Thread t = new Thread(new Runnable() {
398	<	public void run() {
399	<	try {
400	<	ArrayBlockingQueue q = populatedQueue(SIZE);
401	<	for (int i = 0; i < SIZE; ++i) {
402	<	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");
396	>	/**
397	>	* take retrieves elements in FIFO order
398	>	*/
399	>	public void testTake() throws InterruptedException {
400	>	ArrayBlockingQueue q = populatedQueue(SIZE);
401	>	for (int i = 0; i < SIZE; ++i) {
402	>	assertEquals(i, q.take());
403		}
404		}
405
406	+	/**
407	+	* Take removes existing elements until empty, then blocks interruptibly
408	+	*/
409	+	public void testBlockingTake() throws InterruptedException {
410	+	final ArrayBlockingQueue q = populatedQueue(SIZE);
411	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
412	+	Thread t = newStartedThread(new CheckedRunnable() {
413	+	public void realRun() throws InterruptedException {
414	+	for (int i = 0; i < SIZE; ++i) {
415	+	assertEquals(i, q.take());
416	+	}
417	+
418	+	Thread.currentThread().interrupt();
419	+	try {
420	+	q.take();
421	+	shouldThrow();
422	+	} catch (InterruptedException success) {}
423	+	assertFalse(Thread.interrupted());
424
425	<	public void testPoll(){
425	>	pleaseInterrupt.countDown();
426	>	try {
427	>	q.take();
428	>	shouldThrow();
429	>	} catch (InterruptedException success) {}
430	>	assertFalse(Thread.interrupted());
431	>	}});
432	>
433	>	await(pleaseInterrupt);
434	>	assertThreadStaysAlive(t);
435	>	t.interrupt();
436	>	awaitTermination(t);
437	>	}
438	>
439	>	/**
440	>	* poll succeeds unless empty
441	>	*/
442	>	public void testPoll() {
443		ArrayBlockingQueue q = populatedQueue(SIZE);
444		for (int i = 0; i < SIZE; ++i) {
445	<	assertEquals(i, ((Integer)q.poll()).intValue());
445	>	assertEquals(i, q.poll());
446		}
447	<	assertNull(q.poll());
447	>	assertNull(q.poll());
448		}
449
450	<	public void testTimedPoll0() {
451	<	try {
452	<	ArrayBlockingQueue q = populatedQueue(SIZE);
453	<	for (int i = 0; i < SIZE; ++i) {
454	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
455	<	}
456	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
457	<	} catch (InterruptedException e){
458	<	fail("Unexpected exception");
459	<	}
450	>	/**
451	>	* timed poll with zero timeout succeeds when non-empty, else times out
452	>	*/
453	>	public void testTimedPoll0() throws InterruptedException {
454	>	ArrayBlockingQueue q = populatedQueue(SIZE);
455	>	for (int i = 0; i < SIZE; ++i) {
456	>	assertEquals(i, q.poll(0, MILLISECONDS));
457	>	}
458	>	assertNull(q.poll(0, MILLISECONDS));
459	>	checkEmpty(q);
460		}
461
462	<	public void testTimedPoll() {
463	<	try {
464	<	ArrayBlockingQueue q = populatedQueue(SIZE);
465	<	for (int i = 0; i < SIZE; ++i) {
466	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
467	<	}
468	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
469	<	} catch (InterruptedException e){
470	<	fail("Unexpected exception");
471	<	}
472	<	}
473	<
474	<	public void testInterruptedTimedPoll(){
475	<	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	<	}
462	>	/**
463	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
464	>	*/
465	>	public void testTimedPoll() throws InterruptedException {
466	>	ArrayBlockingQueue q = populatedQueue(SIZE);
467	>	for (int i = 0; i < SIZE; ++i) {
468	>	long startTime = System.nanoTime();
469	>	assertEquals(i, q.poll(LONG_DELAY_MS, MILLISECONDS));
470	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
471	>	}
472	>	long startTime = System.nanoTime();
473	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
474	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
475	>	checkEmpty(q);
476		}
477
478	<	public void testTimedPollWithOffer(){
479	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
480	<	Thread t = new Thread(new Runnable() {
481	<	public void run(){
482	<	try {
483	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
484	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
485	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
486	<	threadFail("Should block");
487	<	} catch (InterruptedException success) { }
478	>	/**
479	>	* Interrupted timed poll throws InterruptedException instead of
480	>	* returning timeout status
481	>	*/
482	>	public void testInterruptedTimedPoll() throws InterruptedException {
483	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
484	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
485	>	Thread t = newStartedThread(new CheckedRunnable() {
486	>	public void realRun() throws InterruptedException {
487	>	long startTime = System.nanoTime();
488	>	for (int i = 0; i < SIZE; ++i) {
489	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
490		}
491	<	});
492	<	try {
493	<	t.start();
494	<	Thread.sleep(SMALL_DELAY_MS);
495	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
496	<	t.interrupt();
497	<	t.join();
498	<	} catch (Exception e){
499	<	fail("Unexpected exception");
500	<	}
501	<	}
502	<
491	>	aboutToWait.countDown();
492	>	try {
493	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
494	>	shouldThrow();
495	>	} catch (InterruptedException success) {
496	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
497	>	}
498	>	}});
499	>
500	>	await(aboutToWait);
501	>	waitForThreadToEnterWaitState(t);
502	>	t.interrupt();
503	>	awaitTermination(t);
504	>	checkEmpty(q);
505	>	}
506
507	<	public void testPeek(){
507	>	/**
508	>	* peek returns next element, or null if empty
509	>	*/
510	>	public void testPeek() {
511		ArrayBlockingQueue q = populatedQueue(SIZE);
512		for (int i = 0; i < SIZE; ++i) {
513	<	assertEquals(i, ((Integer)q.peek()).intValue());
514	<	q.poll();
513	>	assertEquals(i, q.peek());
514	>	assertEquals(i, q.poll());
515		assertTrue(q.peek() == null ||
516	<	i != ((Integer)q.peek()).intValue());
516	>	!q.peek().equals(i));
517		}
518	<	assertNull(q.peek());
518	>	assertNull(q.peek());
519		}
520
521	<	public void testElement(){
521	>	/**
522	>	* element returns next element, or throws NSEE if empty
523	>	*/
524	>	public void testElement() {
525		ArrayBlockingQueue q = populatedQueue(SIZE);
526		for (int i = 0; i < SIZE; ++i) {
527	<	assertEquals(i, ((Integer)q.element()).intValue());
528	<	q.poll();
527	>	assertEquals(i, q.element());
528	>	assertEquals(i, q.poll());
529		}
530		try {
531		q.element();
532	<	fail("no such element");
533	<	}
474	<	catch (NoSuchElementException success) {}
532	>	shouldThrow();
533	>	} catch (NoSuchElementException success) {}
534		}
535
536	<	public void testRemove(){
536	>	/**
537	>	* remove removes next element, or throws NSEE if empty
538	>	*/
539	>	public void testRemove() {
540		ArrayBlockingQueue q = populatedQueue(SIZE);
541		for (int i = 0; i < SIZE; ++i) {
542	<	assertEquals(i, ((Integer)q.remove()).intValue());
542	>	assertEquals(i, q.remove());
543		}
544		try {
545		q.remove();
546	<	fail("remove should throw");
547	<	} catch (NoSuchElementException success){
486	<	}
546	>	shouldThrow();
547	>	} catch (NoSuchElementException success) {}
548		}
549
550	<	public void testRemoveElement(){
551	<	ArrayBlockingQueue q = populatedQueue(SIZE);
552	<	for (int i = 1; i < SIZE; i+=2) {
553	<	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(){
550	>	/**
551	>	* contains(x) reports true when elements added but not yet removed
552	>	*/
553	>	public void testContains() {
554		ArrayBlockingQueue q = populatedQueue(SIZE);
555		for (int i = 0; i < SIZE; ++i) {
556		assertTrue(q.contains(new Integer(i)));
557	<	q.poll();
557	>	assertEquals(i, q.poll());
558		assertFalse(q.contains(new Integer(i)));
559		}
560		}
561
562	<	public void testClear(){
562	>	/**
563	>	* clear removes all elements
564	>	*/
565	>	public void testClear() {
566		ArrayBlockingQueue q = populatedQueue(SIZE);
567		q.clear();
568		assertTrue(q.isEmpty());
#	Line 515 | Line 570 | public class ArrayBlockingQueueTest exte
570		assertEquals(SIZE, q.remainingCapacity());
571		q.add(one);
572		assertFalse(q.isEmpty());
573	+	assertTrue(q.contains(one));
574		q.clear();
575		assertTrue(q.isEmpty());
576		}
577
578	<	public void testContainsAll(){
578	>	/**
579	>	* containsAll(c) is true when c contains a subset of elements
580	>	*/
581	>	public void testContainsAll() {
582		ArrayBlockingQueue q = populatedQueue(SIZE);
583		ArrayBlockingQueue p = new ArrayBlockingQueue(SIZE);
584		for (int i = 0; i < SIZE; ++i) {
#	Line 530 | Line 589 | public class ArrayBlockingQueueTest exte
589		assertTrue(p.containsAll(q));
590		}
591
592	<	public void testRetainAll(){
592	>	/**
593	>	* retainAll(c) retains only those elements of c and reports true if changed
594	>	*/
595	>	public void testRetainAll() {
596		ArrayBlockingQueue q = populatedQueue(SIZE);
597		ArrayBlockingQueue p = populatedQueue(SIZE);
598		for (int i = 0; i < SIZE; ++i) {
#	Line 541 | Line 603 | public class ArrayBlockingQueueTest exte
603		assertTrue(changed);
604
605		assertTrue(q.containsAll(p));
606	<	assertEquals(SIZE-i, q.size());
606	>	assertEquals(SIZE - i, q.size());
607		p.remove();
608		}
609		}
610
611	<	public void testRemoveAll(){
611	>	/**
612	>	* removeAll(c) removes only those elements of c and reports true if changed
613	>	*/
614	>	public void testRemoveAll() {
615		for (int i = 1; i < SIZE; ++i) {
616		ArrayBlockingQueue q = populatedQueue(SIZE);
617		ArrayBlockingQueue p = populatedQueue(i);
618		assertTrue(q.removeAll(p));
619	<	assertEquals(SIZE-i, q.size());
619	>	assertEquals(SIZE - i, q.size());
620		for (int j = 0; j < i; ++j) {
621	<	Integer I = (Integer)(p.remove());
622	<	assertFalse(q.contains(I));
621	>	Integer x = (Integer)(p.remove());
622	>	assertFalse(q.contains(x));
623		}
624		}
625		}
626
627	+	void checkToArray(ArrayBlockingQueue<Integer> q) {
628	+	int size = q.size();
629	+	Object[] a1 = q.toArray();
630	+	assertEquals(size, a1.length);
631	+	Integer[] a2 = q.toArray(new Integer[0]);
632	+	assertEquals(size, a2.length);
633	+	Integer[] a3 = q.toArray(new Integer[Math.max(0, size - 1)]);
634	+	assertEquals(size, a3.length);
635	+	Integer[] a4 = new Integer[size];
636	+	assertSame(a4, q.toArray(a4));
637	+	Integer[] a5 = new Integer[size + 1];
638	+	Arrays.fill(a5, 42);
639	+	assertSame(a5, q.toArray(a5));
640	+	Integer[] a6 = new Integer[size + 2];
641	+	Arrays.fill(a6, 42);
642	+	assertSame(a6, q.toArray(a6));
643	+	Object[][] as = { a1, a2, a3, a4, a5, a6 };
644	+	for (Object[] a : as) {
645	+	if (a.length > size) assertNull(a[size]);
646	+	if (a.length > size + 1) assertEquals(42, a[size + 1]);
647	+	}
648	+	Iterator it = q.iterator();
649	+	Integer s = q.peek();
650	+	for (int i = 0; i < size; i++) {
651	+	Integer x = (Integer) it.next();
652	+	assertEquals(s + i, (int) x);
653	+	for (Object[] a : as)
654	+	assertSame(a1[i], x);
655	+	}
656	+	}
657	+
658	+	/**
659	+	* toArray() and toArray(a) contain all elements in FIFO order
660	+	*/
661	+	public void testToArray() {
662	+	final ThreadLocalRandom rnd = ThreadLocalRandom.current();
663	+	final int size = rnd.nextInt(6);
664	+	final int capacity = Math.max(1, size + rnd.nextInt(size + 1));
665	+	ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<>(capacity);
666	+	for (int i = 0; i < size; i++) {
667	+	checkToArray(q);
668	+	q.add(i);
669	+	}
670	+	// Provoke wraparound
671	+	int added = size * 2;
672	+	for (int i = 0; i < added; i++) {
673	+	checkToArray(q);
674	+	assertEquals((Integer) i, q.poll());
675	+	q.add(size + i);
676	+	}
677	+	for (int i = 0; i < size; i++) {
678	+	checkToArray(q);
679	+	assertEquals((Integer) (added + i), q.poll());
680	+	}
681	+	}
682
683	<	public void testToArray(){
683	>	/**
684	>	* toArray(incompatible array type) throws ArrayStoreException
685	>	*/
686	>	public void testToArray_incompatibleArrayType() {
687		ArrayBlockingQueue q = populatedQueue(SIZE);
688	<	Object[] o = q.toArray();
689	<	try {
690	<	for(int i = 0; i < o.length; i++)
691	<	assertEquals(o[i], q.take());
692	<	} catch (InterruptedException e){
693	<	fail("Unexpected exception");
694	<	}
695	<	}
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	<	}
688	>	try {
689	>	q.toArray(new String[10]);
690	>	shouldThrow();
691	>	} catch (ArrayStoreException success) {}
692	>	try {
693	>	q.toArray(new String[0]);
694	>	shouldThrow();
695	>	} catch (ArrayStoreException success) {}
696		}
697
698	<	public void testIteratorOrdering() {
698	>	/**
699	>	* iterator iterates through all elements
700	>	*/
701	>	public void testIterator() throws InterruptedException {
702	>	ArrayBlockingQueue q = populatedQueue(SIZE);
703	>	Iterator it = q.iterator();
704	>	int i;
705	>	for (i = 0; it.hasNext(); i++)
706	>	assertTrue(q.contains(it.next()));
707	>	assertEquals(i, SIZE);
708	>	assertIteratorExhausted(it);
709	>
710	>	it = q.iterator();
711	>	for (i = 0; it.hasNext(); i++)
712	>	assertEquals(it.next(), q.take());
713	>	assertEquals(i, SIZE);
714	>	assertIteratorExhausted(it);
715	>	}
716	>
717	>	/**
718	>	* iterator of empty collection has no elements
719	>	*/
720	>	public void testEmptyIterator() {
721	>	assertIteratorExhausted(new ArrayBlockingQueue(SIZE).iterator());
722	>	}
723
724	+	/**
725	+	* iterator.remove removes current element
726	+	*/
727	+	public void testIteratorRemove() {
728		final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
729	+	q.add(two);
730	+	q.add(one);
731	+	q.add(three);
732	+
733	+	Iterator it = q.iterator();
734	+	it.next();
735	+	it.remove();
736	+
737	+	it = q.iterator();
738	+	assertSame(it.next(), one);
739	+	assertSame(it.next(), three);
740	+	assertFalse(it.hasNext());
741	+	}
742
743	+	/**
744	+	* iterator ordering is FIFO
745	+	*/
746	+	public void testIteratorOrdering() {
747	+	final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
748		q.add(one);
749		q.add(two);
750		q.add(three);
#	Line 607 | Line 753 | public class ArrayBlockingQueueTest exte
753
754		int k = 0;
755		for (Iterator it = q.iterator(); it.hasNext();) {
756	<	int i = ((Integer)(it.next())).intValue();
611	<	assertEquals("items should come out in order", ++k, i);
756	>	assertEquals(++k, it.next());
757		}
758	<
614	<	assertEquals("should go through 3 elements", 3, k);
758	>	assertEquals(3, k);
759		}
760
761	<	public void testWeaklyConsistentIteration () {
762	<
761	>	/**
762	>	* Modifications do not cause iterators to fail
763	>	*/
764	>	public void testWeaklyConsistentIteration() {
765		final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
620	–
766		q.add(one);
767		q.add(two);
768		q.add(three);
769	<
770	<	try {
771	<	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");
769	>	for (Iterator it = q.iterator(); it.hasNext();) {
770	>	q.remove();
771	>	it.next();
772		}
773	<
635	<	assertEquals("queue should be empty again", 0, q.size());
773	>	assertEquals(0, q.size());
774		}
775
776	<
777	<	public void testToString(){
776	>	/**
777	>	* toString contains toStrings of elements
778	>	*/
779	>	public void testToString() {
780		ArrayBlockingQueue q = populatedQueue(SIZE);
781		String s = q.toString();
782		for (int i = 0; i < SIZE; ++i) {
783	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
783	>	assertTrue(s.contains(String.valueOf(i)));
784		}
785	<	}
646	<
785	>	}
786
787	+	/**
788	+	* offer transfers elements across Executor tasks
789	+	*/
790		public void testOfferInExecutor() {
649	–
791		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
651	–
792		q.add(one);
793		q.add(two);
794	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
795	+	final ExecutorService executor = Executors.newFixedThreadPool(2);
796	+	try (PoolCleaner cleaner = cleaner(executor)) {
797	+	executor.execute(new CheckedRunnable() {
798	+	public void realRun() throws InterruptedException {
799	+	assertFalse(q.offer(three));
800	+	threadsStarted.await();
801	+	assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS));
802	+	assertEquals(0, q.remainingCapacity());
803	+	}});
804
805	<	ExecutorService executor = Executors.newFixedThreadPool(2);
806	<
807	<	executor.execute(new Runnable() {
808	<	public void run() {
809	<	threadAssertFalse(q.offer(three));
810	<	try {
811	<	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	<
805	>	executor.execute(new CheckedRunnable() {
806	>	public void realRun() throws InterruptedException {
807	>	threadsStarted.await();
808	>	assertEquals(0, q.remainingCapacity());
809	>	assertSame(one, q.take());
810	>	}});
811	>	}
812		}
813
814	+	/**
815	+	* timed poll retrieves elements across Executor threads
816	+	*/
817		public void testPollInExecutor() {
687	–
818		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
819	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
820	+	final ExecutorService executor = Executors.newFixedThreadPool(2);
821	+	try (PoolCleaner cleaner = cleaner(executor)) {
822	+	executor.execute(new CheckedRunnable() {
823	+	public void realRun() throws InterruptedException {
824	+	assertNull(q.poll());
825	+	threadsStarted.await();
826	+	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
827	+	checkEmpty(q);
828	+	}});
829
830	<	ExecutorService executor = Executors.newFixedThreadPool(2);
831	<
832	<	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);
830	>	executor.execute(new CheckedRunnable() {
831	>	public void realRun() throws InterruptedException {
832	>	threadsStarted.await();
833		q.put(one);
834	<	}
835	<	catch (InterruptedException e) {
836	<	threadFail("should not be interrupted");
713	<	}
714	<	}
715	<	});
716	<
717	<	joinPool(executor);
834	>	}});
835	>	}
836	>	}
837
838	+	/**
839	+	* A deserialized serialized queue has same elements in same order
840	+	*/
841	+	public void testSerialization() throws Exception {
842	+	Queue x = populatedQueue(SIZE);
843	+	Queue y = serialClone(x);
844	+
845	+	assertNotSame(x, y);
846	+	assertEquals(x.size(), y.size());
847	+	assertEquals(x.toString(), y.toString());
848	+	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
849	+	while (!x.isEmpty()) {
850	+	assertFalse(y.isEmpty());
851	+	assertEquals(x.remove(), y.remove());
852	+	}
853	+	assertTrue(y.isEmpty());
854		}
855
856	<	public void testSerialization() {
856	>	/**
857	>	* drainTo(c) empties queue into another collection c
858	>	*/
859	>	public void testDrainTo() {
860		ArrayBlockingQueue q = populatedQueue(SIZE);
861	+	ArrayList l = new ArrayList();
862	+	q.drainTo(l);
863	+	assertEquals(0, q.size());
864	+	assertEquals(SIZE, l.size());
865	+	for (int i = 0; i < SIZE; ++i)
866	+	assertEquals(l.get(i), new Integer(i));
867	+	q.add(zero);
868	+	q.add(one);
869	+	assertFalse(q.isEmpty());
870	+	assertTrue(q.contains(zero));
871	+	assertTrue(q.contains(one));
872	+	l.clear();
873	+	q.drainTo(l);
874	+	assertEquals(0, q.size());
875	+	assertEquals(2, l.size());
876	+	for (int i = 0; i < 2; ++i)
877	+	assertEquals(l.get(i), new Integer(i));
878	+	}
879
880	<	try {
881	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
882	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
883	<	out.writeObject(q);
884	<	out.close();
880	>	/**
881	>	* drainTo empties full queue, unblocking a waiting put.
882	>	*/
883	>	public void testDrainToWithActivePut() throws InterruptedException {
884	>	final ArrayBlockingQueue q = populatedQueue(SIZE);
885	>	Thread t = new Thread(new CheckedRunnable() {
886	>	public void realRun() throws InterruptedException {
887	>	q.put(new Integer(SIZE + 1));
888	>	}});
889	>
890	>	t.start();
891	>	ArrayList l = new ArrayList();
892	>	q.drainTo(l);
893	>	assertTrue(l.size() >= SIZE);
894	>	for (int i = 0; i < SIZE; ++i)
895	>	assertEquals(l.get(i), new Integer(i));
896	>	t.join();
897	>	assertTrue(q.size() + l.size() >= SIZE);
898	>	}
899
900	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
901	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
902	<	ArrayBlockingQueue r = (ArrayBlockingQueue)in.readObject();
903	<	assertEquals(q.size(), r.size());
904	<	while (!q.isEmpty())
905	<	assertEquals(q.remove(), r.remove());
906	<	} catch(Exception e){
907	<	fail("unexpected exception");
900	>	/**
901	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
902	>	*/
903	>	public void testDrainToN() {
904	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE * 2);
905	>	for (int i = 0; i < SIZE + 2; ++i) {
906	>	for (int j = 0; j < SIZE; j++)
907	>	assertTrue(q.offer(new Integer(j)));
908	>	ArrayList l = new ArrayList();
909	>	q.drainTo(l, i);
910	>	int k = (i < SIZE) ? i : SIZE;
911	>	assertEquals(k, l.size());
912	>	assertEquals(SIZE - k, q.size());
913	>	for (int j = 0; j < k; ++j)
914	>	assertEquals(l.get(j), new Integer(j));
915	>	do {} while (q.poll() != null);
916		}
917		}
918
919	<
919	>	/**
920	>	* remove(null), contains(null) always return false
921	>	*/
922	>	public void testNeverContainsNull() {
923	>	Collection<?>[] qs = {
924	>	new ArrayBlockingQueue<Object>(10),
925	>	populatedQueue(2),
926	>	};
927	>
928	>	for (Collection<?> q : qs) {
929	>	assertFalse(q.contains(null));
930	>	assertFalse(q.remove(null));
931	>	}
932	>	}
933		}

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