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

Comparing jsr166/src/test/tck/LinkedBlockingQueueTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.74 by jsr166, Sun May 14 04:02:06 2017 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import 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.BlockingQueue;
18	>	import java.util.concurrent.CountDownLatch;
19	>	import java.util.concurrent.Executors;
20	>	import java.util.concurrent.ExecutorService;
21	>	import java.util.concurrent.LinkedBlockingQueue;
22	>
23	>	import junit.framework.Test;
24
25		public class LinkedBlockingQueueTest extends JSR166TestCase {
26
27	+	public static class Unbounded extends BlockingQueueTest {
28	+	protected BlockingQueue emptyCollection() {
29	+	return new LinkedBlockingQueue();
30	+	}
31	+	}
32	+
33	+	public static class Bounded extends BlockingQueueTest {
34	+	protected BlockingQueue emptyCollection() {
35	+	return new LinkedBlockingQueue(SIZE);
36	+	}
37	+	}
38	+
39		public static void main(String[] args) {
40	<	junit.textui.TestRunner.run (suite());
40	>	main(suite(), args);
41		}
42
43		public static Test suite() {
44	<	return new TestSuite(LinkedBlockingQueueTest.class);
44	>	class Implementation implements CollectionImplementation {
45	>	public Class<?> klazz() { return LinkedBlockingQueue.class; }
46	>	public Collection emptyCollection() { return new LinkedBlockingQueue(); }
47	>	public Object makeElement(int i) { return i; }
48	>	public boolean isConcurrent() { return true; }
49	>	public boolean permitsNulls() { return false; }
50	>	}
51	>	return newTestSuite(LinkedBlockingQueueTest.class,
52	>	new Unbounded().testSuite(),
53	>	new Bounded().testSuite(),
54	>	CollectionTest.testSuite(new Implementation()));
55		}
56
23	–
57		/**
58	<	* Create a queue of given size containing consecutive
59	<	* Integers 0 ... n.
58	>	* Returns a new queue of given size containing consecutive
59	>	* Integers 0 ... n - 1.
60		*/
61	<	private LinkedBlockingQueue populatedQueue(int n) {
62	<	LinkedBlockingQueue q = new LinkedBlockingQueue(n);
61	>	private static LinkedBlockingQueue<Integer> populatedQueue(int n) {
62	>	LinkedBlockingQueue<Integer> q =
63	>	new LinkedBlockingQueue<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, or Integer.MAX_VALUE if
76	>	* none given
77	>	*/
78	>	public void testConstructor1() {
79		assertEquals(SIZE, new LinkedBlockingQueue(SIZE).remainingCapacity());
80	+	assertEquals(Integer.MAX_VALUE, new LinkedBlockingQueue().remainingCapacity());
81		}
82
83	<	public void testConstructor2(){
83	>	/**
84	>	* Constructor throws IllegalArgumentException if capacity argument nonpositive
85	>	*/
86	>	public void testConstructor2() {
87		try {
88	<	LinkedBlockingQueue q = new LinkedBlockingQueue(0);
89	<	fail("Cannot make zero-sized");
90	<	}
48	<	catch (IllegalArgumentException success) {}
88	>	new LinkedBlockingQueue(0);
89	>	shouldThrow();
90	>	} catch (IllegalArgumentException success) {}
91		}
92
93	<	public void testConstructor3(){
94	<
93	>	/**
94	>	* Initializing from null Collection throws NullPointerException
95	>	*/
96	>	public void testConstructor3() {
97		try {
98	<	LinkedBlockingQueue q = new LinkedBlockingQueue(null);
99	<	fail("Cannot make from null collection");
100	<	}
57	<	catch (NullPointerException success) {}
98	>	new LinkedBlockingQueue(null);
99	>	shouldThrow();
100	>	} catch (NullPointerException success) {}
101		}
102
103	<	public void testConstructor4(){
103	>	/**
104	>	* Initializing from Collection of null elements throws NullPointerException
105	>	*/
106	>	public void testConstructor4() {
107	>	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
108		try {
109	<	Integer[] ints = new Integer[SIZE];
110	<	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
111	<	fail("Cannot make with null elements");
65	<	}
66	<	catch (NullPointerException success) {}
109	>	new LinkedBlockingQueue(elements);
110	>	shouldThrow();
111	>	} catch (NullPointerException success) {}
112		}
113
114	<	public void testConstructor5(){
115	<	try {
116	<	Integer[] ints = new Integer[SIZE];
117	<	for (int i = 0; i < SIZE-1; ++i)
118	<	ints[i] = new Integer(i);
119	<	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
120	<	fail("Cannot make with null elements");
121	<	}
122	<	catch (NullPointerException success) {}
114	>	/**
115	>	* Initializing from Collection with some null elements throws
116	>	* NullPointerException
117	>	*/
118	>	public void testConstructor5() {
119	>	Integer[] ints = new Integer[SIZE];
120	>	for (int i = 0; i < SIZE - 1; ++i)
121	>	ints[i] = new Integer(i);
122	>	Collection<Integer> elements = Arrays.asList(ints);
123	>	try {
124	>	new LinkedBlockingQueue(elements);
125	>	shouldThrow();
126	>	} catch (NullPointerException success) {}
127		}
128
129	<	public void testConstructor6(){
130	<	try {
131	<	Integer[] ints = new Integer[SIZE];
132	<	for (int i = 0; i < SIZE; ++i)
133	<	ints[i] = new Integer(i);
134	<	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
135	<	for (int i = 0; i < SIZE; ++i)
136	<	assertEquals(ints[i], q.poll());
137	<	}
138	<	finally {}
129	>	/**
130	>	* Queue contains all elements of collection used to initialize
131	>	*/
132	>	public void testConstructor6() {
133	>	Integer[] ints = new Integer[SIZE];
134	>	for (int i = 0; i < SIZE; ++i)
135	>	ints[i] = new Integer(i);
136	>	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
137	>	for (int i = 0; i < SIZE; ++i)
138	>	assertEquals(ints[i], q.poll());
139		}
140
141	+	/**
142	+	* Queue transitions from empty to full when elements added
143	+	*/
144		public void testEmptyFull() {
145		LinkedBlockingQueue q = new LinkedBlockingQueue(2);
146		assertTrue(q.isEmpty());
#	Line 97 | Line 149 | public class LinkedBlockingQueueTest ext
149		assertFalse(q.isEmpty());
150		q.add(two);
151		assertFalse(q.isEmpty());
152	<	assertEquals("queue should be full", 0, q.remainingCapacity());
153	<	assertFalse("offer should be rejected", q.offer(three));
152	>	assertEquals(0, q.remainingCapacity());
153	>	assertFalse(q.offer(three));
154		}
155
156	<	public void testRemainingCapacity(){
157	<	LinkedBlockingQueue q = populatedQueue(SIZE);
156	>	/**
157	>	* remainingCapacity decreases on add, increases on remove
158	>	*/
159	>	public void testRemainingCapacity() {
160	>	BlockingQueue q = populatedQueue(SIZE);
161		for (int i = 0; i < SIZE; ++i) {
162		assertEquals(i, q.remainingCapacity());
163	<	assertEquals(SIZE-i, q.size());
164	<	q.remove();
163	>	assertEquals(SIZE, q.size() + q.remainingCapacity());
164	>	assertEquals(i, q.remove());
165		}
166		for (int i = 0; i < SIZE; ++i) {
167	<	assertEquals(SIZE-i, q.remainingCapacity());
168	<	assertEquals(i, q.size());
169	<	q.add(new Integer(i));
167	>	assertEquals(SIZE - i, q.remainingCapacity());
168	>	assertEquals(SIZE, q.size() + q.remainingCapacity());
169	>	assertTrue(q.add(i));
170		}
171		}
172
173	<	public void testOfferNull(){
174	<	try {
175	<	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
176	<	q.offer(null);
122	<	fail("should throw NPE");
123	<	} catch (NullPointerException success) { }
124	<	}
125	<
126	<	public void testOffer(){
173	>	/**
174	>	* Offer succeeds if not full; fails if full
175	>	*/
176	>	public void testOffer() {
177		LinkedBlockingQueue q = new LinkedBlockingQueue(1);
178		assertTrue(q.offer(zero));
179		assertFalse(q.offer(one));
180		}
181
182	<	public void testAdd(){
183	<	try {
184	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
185	<	for (int i = 0; i < SIZE; ++i) {
186	<	assertTrue(q.add(new Integer(i)));
187	<	}
188	<	assertEquals(0, q.remainingCapacity());
182	>	/**
183	>	* add succeeds if not full; throws IllegalStateException if full
184	>	*/
185	>	public void testAdd() {
186	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
187	>	for (int i = 0; i < SIZE; ++i)
188	>	assertTrue(q.add(new Integer(i)));
189	>	assertEquals(0, q.remainingCapacity());
190	>	try {
191		q.add(new Integer(SIZE));
192	<	} catch (IllegalStateException success){
193	<	}
192	>	shouldThrow();
193	>	} catch (IllegalStateException success) {}
194		}
195
196	<	public void testAddAll1(){
196	>	/**
197	>	* addAll(this) throws IllegalArgumentException
198	>	*/
199	>	public void testAddAllSelf() {
200	>	LinkedBlockingQueue q = populatedQueue(SIZE);
201		try {
202	<	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
203	<	q.addAll(null);
204	<	fail("Cannot add null collection");
149	<	}
150	<	catch (NullPointerException success) {}
151	<	}
152	<	public void testAddAll2(){
153	<	try {
154	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
155	<	Integer[] ints = new Integer[SIZE];
156	<	q.addAll(Arrays.asList(ints));
157	<	fail("Cannot add null elements");
158	<	}
159	<	catch (NullPointerException success) {}
160	<	}
161	<	public void testAddAll3(){
162	<	try {
163	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
164	<	Integer[] ints = new Integer[SIZE];
165	<	for (int i = 0; i < SIZE-1; ++i)
166	<	ints[i] = new Integer(i);
167	<	q.addAll(Arrays.asList(ints));
168	<	fail("Cannot add null elements");
169	<	}
170	<	catch (NullPointerException success) {}
171	<	}
172	<	public void testAddAll4(){
173	<	try {
174	<	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
175	<	Integer[] ints = new Integer[SIZE];
176	<	for (int i = 0; i < SIZE; ++i)
177	<	ints[i] = new Integer(i);
178	<	q.addAll(Arrays.asList(ints));
179	<	fail("Cannot add with insufficient capacity");
180	<	}
181	<	catch (IllegalStateException success) {}
182	<	}
183	<	public void testAddAll5(){
184	<	try {
185	<	Integer[] empty = new Integer[0];
186	<	Integer[] ints = new Integer[SIZE];
187	<	for (int i = 0; i < SIZE; ++i)
188	<	ints[i] = new Integer(i);
189	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
190	<	assertFalse(q.addAll(Arrays.asList(empty)));
191	<	assertTrue(q.addAll(Arrays.asList(ints)));
192	<	for (int i = 0; i < SIZE; ++i)
193	<	assertEquals(ints[i], q.poll());
194	<	}
195	<	finally {}
196	<	}
197	<
198	<	public void testPutNull() {
199	<	try {
200	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
201	<	q.put(null);
202	<	fail("put should throw NPE");
203	<	}
204	<	catch (NullPointerException success){
205	<	}
206	<	catch (InterruptedException ie) {
207	<	fail("Unexpected exception");
208	<	}
209	<	}
210	<
211	<	public void testPut() {
212	<	try {
213	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
214	<	for (int i = 0; i < SIZE; ++i) {
215	<	Integer I = new Integer(i);
216	<	q.put(I);
217	<	assertTrue(q.contains(I));
218	<	}
219	<	assertEquals(0, q.remainingCapacity());
220	<	}
221	<	catch (InterruptedException ie) {
222	<	fail("Unexpected exception");
223	<	}
224	<	}
225	<
226	<	public void testBlockingPut(){
227	<	Thread t = new Thread(new Runnable() {
228	<	public void run() {
229	<	int added = 0;
230	<	try {
231	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
232	<	for (int i = 0; i < SIZE; ++i) {
233	<	q.put(new Integer(i));
234	<	++added;
235	<	}
236	<	q.put(new Integer(SIZE));
237	<	threadFail("put should block");
238	<	} catch (InterruptedException ie){
239	<	threadAssertEquals(added, SIZE);
240	<	}
241	<	}});
242	<	t.start();
243	<	try {
244	<	Thread.sleep(SHORT_DELAY_MS);
245	<	t.interrupt();
246	<	t.join();
247	<	}
248	<	catch (InterruptedException ie) {
249	<	fail("Unexpected exception");
250	<	}
202	>	q.addAll(q);
203	>	shouldThrow();
204	>	} catch (IllegalArgumentException success) {}
205		}
206
207	<	public void testPutWithTake() {
208	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
209	<	Thread t = new Thread(new Runnable() {
210	<	public void run(){
211	<	int added = 0;
212	<	try {
213	<	q.put(new Object());
214	<	++added;
215	<	q.put(new Object());
216	<	++added;
217	<	q.put(new Object());
218	<	++added;
219	<	q.put(new Object());
220	<	++added;
267	<	threadFail("Should block");
268	<	} catch (InterruptedException e){
269	<	threadAssertTrue(added >= 2);
270	<	}
271	<	}
272	<	});
273	<	try {
274	<	t.start();
275	<	Thread.sleep(SHORT_DELAY_MS);
276	<	q.take();
277	<	t.interrupt();
278	<	t.join();
279	<	} catch (Exception e){
280	<	fail("Unexpected exception");
281	<	}
207	>	/**
208	>	* addAll of a collection with any null elements throws NPE after
209	>	* possibly adding some elements
210	>	*/
211	>	public void testAddAll3() {
212	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
213	>	Integer[] ints = new Integer[SIZE];
214	>	for (int i = 0; i < SIZE - 1; ++i)
215	>	ints[i] = new Integer(i);
216	>	Collection<Integer> elements = Arrays.asList(ints);
217	>	try {
218	>	q.addAll(elements);
219	>	shouldThrow();
220	>	} catch (NullPointerException success) {}
221		}
222
223	<	public void testTimedOffer() {
224	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
225	<	Thread t = new Thread(new Runnable() {
226	<	public void run(){
227	<	try {
228	<	q.put(new Object());
229	<	q.put(new Object());
230	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
231	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
232	<	threadFail("Should block");
233	<	} catch (InterruptedException success){}
234	<	}
235	<	});
297	<
298	<	try {
299	<	t.start();
300	<	Thread.sleep(SMALL_DELAY_MS);
301	<	t.interrupt();
302	<	t.join();
303	<	} catch (Exception e){
304	<	fail("Unexpected exception");
305	<	}
223	>	/**
224	>	* addAll throws IllegalStateException if not enough room
225	>	*/
226	>	public void testAddAll4() {
227	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE - 1);
228	>	Integer[] ints = new Integer[SIZE];
229	>	for (int i = 0; i < SIZE; ++i)
230	>	ints[i] = new Integer(i);
231	>	Collection<Integer> elements = Arrays.asList(ints);
232	>	try {
233	>	q.addAll(elements);
234	>	shouldThrow();
235	>	} catch (IllegalStateException success) {}
236		}
237
238	<	public void testTake(){
239	<	try {
240	<	LinkedBlockingQueue q = populatedQueue(SIZE);
241	<	for (int i = 0; i < SIZE; ++i) {
242	<	assertEquals(i, ((Integer)q.take()).intValue());
243	<	}
244	<	} catch (InterruptedException e){
245	<	fail("Unexpected exception");
246	<	}
238	>	/**
239	>	* Queue contains all elements, in traversal order, of successful addAll
240	>	*/
241	>	public void testAddAll5() {
242	>	Integer[] empty = new Integer[0];
243	>	Integer[] ints = new Integer[SIZE];
244	>	for (int i = 0; i < SIZE; ++i)
245	>	ints[i] = new Integer(i);
246	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
247	>	assertFalse(q.addAll(Arrays.asList(empty)));
248	>	assertTrue(q.addAll(Arrays.asList(ints)));
249	>	for (int i = 0; i < SIZE; ++i)
250	>	assertEquals(ints[i], q.poll());
251		}
252
253	<	public void testTakeFromEmpty() {
254	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
255	<	Thread t = new Thread(new Runnable() {
256	<	public void run(){
257	<	try {
258	<	q.take();
259	<	threadFail("Should block");
260	<	} catch (InterruptedException success){ }
261	<	}
328	<	});
329	<	try {
330	<	t.start();
331	<	Thread.sleep(SHORT_DELAY_MS);
332	<	t.interrupt();
333	<	t.join();
334	<	} catch (Exception e){
335	<	fail("Unexpected exception");
253	>	/**
254	>	* all elements successfully put are contained
255	>	*/
256	>	public void testPut() throws InterruptedException {
257	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
258	>	for (int i = 0; i < SIZE; ++i) {
259	>	Integer x = new Integer(i);
260	>	q.put(x);
261	>	assertTrue(q.contains(x));
262		}
263	+	assertEquals(0, q.remainingCapacity());
264		}
265
266	<	public void testBlockingTake(){
267	<	Thread t = new Thread(new Runnable() {
268	<	public void run() {
269	<	try {
270	<	LinkedBlockingQueue q = populatedQueue(SIZE);
271	<	for (int i = 0; i < SIZE; ++i) {
272	<	assertEquals(i, ((Integer)q.take()).intValue());
273	<	}
274	<	q.take();
275	<	threadFail("take should block");
276	<	} catch (InterruptedException success){
277	<	}
278	<	}});
279	<	t.start();
280	<	try {
281	<	Thread.sleep(SHORT_DELAY_MS);
282	<	t.interrupt();
283	<	t.join();
284	<	}
285	<	catch (InterruptedException ie) {
286	<	fail("Unexpected exception");
287	<	}
266	>	/**
267	>	* put blocks interruptibly if full
268	>	*/
269	>	public void testBlockingPut() throws InterruptedException {
270	>	final LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
271	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
272	>	Thread t = newStartedThread(new CheckedRunnable() {
273	>	public void realRun() throws InterruptedException {
274	>	for (int i = 0; i < SIZE; ++i)
275	>	q.put(i);
276	>	assertEquals(SIZE, q.size());
277	>	assertEquals(0, q.remainingCapacity());
278	>
279	>	Thread.currentThread().interrupt();
280	>	try {
281	>	q.put(99);
282	>	shouldThrow();
283	>	} catch (InterruptedException success) {}
284	>	assertFalse(Thread.interrupted());
285	>
286	>	pleaseInterrupt.countDown();
287	>	try {
288	>	q.put(99);
289	>	shouldThrow();
290	>	} catch (InterruptedException success) {}
291	>	assertFalse(Thread.interrupted());
292	>	}});
293	>
294	>	await(pleaseInterrupt);
295	>	assertThreadBlocks(t, Thread.State.WAITING);
296	>	t.interrupt();
297	>	awaitTermination(t);
298	>	assertEquals(SIZE, q.size());
299	>	assertEquals(0, q.remainingCapacity());
300	>	}
301	>
302	>	/**
303	>	* put blocks interruptibly waiting for take when full
304	>	*/
305	>	public void testPutWithTake() throws InterruptedException {
306	>	final int capacity = 2;
307	>	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
308	>	final CountDownLatch pleaseTake = new CountDownLatch(1);
309	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
310	>	Thread t = newStartedThread(new CheckedRunnable() {
311	>	public void realRun() throws InterruptedException {
312	>	for (int i = 0; i < capacity; i++)
313	>	q.put(i);
314	>	pleaseTake.countDown();
315	>	q.put(86);
316	>
317	>	Thread.currentThread().interrupt();
318	>	try {
319	>	q.put(99);
320	>	shouldThrow();
321	>	} catch (InterruptedException success) {}
322	>	assertFalse(Thread.interrupted());
323	>
324	>	pleaseInterrupt.countDown();
325	>	try {
326	>	q.put(99);
327	>	shouldThrow();
328	>	} catch (InterruptedException success) {}
329	>	assertFalse(Thread.interrupted());
330	>	}});
331	>
332	>	await(pleaseTake);
333	>	assertEquals(0, q.remainingCapacity());
334	>	assertEquals(0, q.take());
335	>
336	>	await(pleaseInterrupt);
337	>	assertThreadBlocks(t, Thread.State.WAITING);
338	>	t.interrupt();
339	>	awaitTermination(t);
340	>	assertEquals(0, q.remainingCapacity());
341		}
342
343	+	/**
344	+	* timed offer times out if full and elements not taken
345	+	*/
346	+	public void testTimedOffer() {
347	+	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
348	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
349	+	Thread t = newStartedThread(new CheckedRunnable() {
350	+	public void realRun() throws InterruptedException {
351	+	q.put(new Object());
352	+	q.put(new Object());
353	+	long startTime = System.nanoTime();
354	+	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
355	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
356	+	pleaseInterrupt.countDown();
357	+	try {
358	+	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
359	+	shouldThrow();
360	+	} catch (InterruptedException success) {}
361	+	assertFalse(Thread.interrupted());
362	+	}});
363	+
364	+	await(pleaseInterrupt);
365	+	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
366	+	t.interrupt();
367	+	awaitTermination(t);
368	+	}
369
370	<	public void testPoll(){
370	>	/**
371	>	* take retrieves elements in FIFO order
372	>	*/
373	>	public void testTake() throws InterruptedException {
374		LinkedBlockingQueue q = populatedQueue(SIZE);
375		for (int i = 0; i < SIZE; ++i) {
376	<	assertEquals(i, ((Integer)q.poll()).intValue());
376	>	assertEquals(i, q.take());
377		}
369	–	assertNull(q.poll());
378		}
379
380	<	public void testTimedPoll0() {
381	<	try {
382	<	LinkedBlockingQueue q = populatedQueue(SIZE);
383	<	for (int i = 0; i < SIZE; ++i) {
384	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
385	<	}
386	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
387	<	} catch (InterruptedException e){
388	<	fail("Unexpected exception");
389	<	}
380	>	/**
381	>	* Take removes existing elements until empty, then blocks interruptibly
382	>	*/
383	>	public void testBlockingTake() throws InterruptedException {
384	>	final BlockingQueue q = populatedQueue(SIZE);
385	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
386	>	Thread t = newStartedThread(new CheckedRunnable() {
387	>	public void realRun() throws InterruptedException {
388	>	for (int i = 0; i < SIZE; i++) assertEquals(i, q.take());
389	>
390	>	Thread.currentThread().interrupt();
391	>	try {
392	>	q.take();
393	>	shouldThrow();
394	>	} catch (InterruptedException success) {}
395	>	assertFalse(Thread.interrupted());
396	>
397	>	pleaseInterrupt.countDown();
398	>	try {
399	>	q.take();
400	>	shouldThrow();
401	>	} catch (InterruptedException success) {}
402	>	assertFalse(Thread.interrupted());
403	>	}});
404	>
405	>	await(pleaseInterrupt);
406	>	assertThreadBlocks(t, Thread.State.WAITING);
407	>	t.interrupt();
408	>	awaitTermination(t);
409		}
410
411	<	public void testTimedPoll() {
412	<	try {
413	<	LinkedBlockingQueue q = populatedQueue(SIZE);
414	<	for (int i = 0; i < SIZE; ++i) {
415	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
416	<	}
417	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
391	<	} catch (InterruptedException e){
392	<	fail("Unexpected exception");
393	<	}
394	<	}
395	<
396	<	public void testInterruptedTimedPoll(){
397	<	Thread t = new Thread(new Runnable() {
398	<	public void run() {
399	<	try {
400	<	LinkedBlockingQueue q = populatedQueue(SIZE);
401	<	for (int i = 0; i < SIZE; ++i) {
402	<	threadAssertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
403	<	}
404	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
405	<	} catch (InterruptedException success){
406	<	}
407	<	}});
408	<	t.start();
409	<	try {
410	<	Thread.sleep(SHORT_DELAY_MS);
411	<	t.interrupt();
412	<	t.join();
413	<	}
414	<	catch (InterruptedException ie) {
415	<	fail("Unexpected exception");
411	>	/**
412	>	* poll succeeds unless empty
413	>	*/
414	>	public void testPoll() {
415	>	LinkedBlockingQueue q = populatedQueue(SIZE);
416	>	for (int i = 0; i < SIZE; ++i) {
417	>	assertEquals(i, q.poll());
418		}
419	+	assertNull(q.poll());
420		}
421
422	<	public void testTimedPollWithOffer(){
423	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
424	<	Thread t = new Thread(new Runnable() {
425	<	public void run(){
426	<	try {
427	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
428	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
426	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
427	<	threadFail("Should block");
428	<	} catch (InterruptedException success) { }
429	<	}
430	<	});
431	<	try {
432	<	t.start();
433	<	Thread.sleep(SMALL_DELAY_MS);
434	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
435	<	t.interrupt();
436	<	t.join();
437	<	} catch (Exception e){
438	<	fail("Unexpected exception");
422	>	/**
423	>	* timed poll with zero timeout succeeds when non-empty, else times out
424	>	*/
425	>	public void testTimedPoll0() throws InterruptedException {
426	>	LinkedBlockingQueue q = populatedQueue(SIZE);
427	>	for (int i = 0; i < SIZE; ++i) {
428	>	assertEquals(i, q.poll(0, MILLISECONDS));
429		}
430	<	}
430	>	assertNull(q.poll(0, MILLISECONDS));
431	>	}
432	>
433	>	/**
434	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
435	>	*/
436	>	public void testTimedPoll() throws InterruptedException {
437	>	LinkedBlockingQueue<Integer> q = populatedQueue(SIZE);
438	>	for (int i = 0; i < SIZE; ++i) {
439	>	long startTime = System.nanoTime();
440	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
441	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
442	>	}
443	>	long startTime = System.nanoTime();
444	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
445	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
446	>	checkEmpty(q);
447	>	}
448
449	+	/**
450	+	* Interrupted timed poll throws InterruptedException instead of
451	+	* returning timeout status
452	+	*/
453	+	public void testInterruptedTimedPoll() throws InterruptedException {
454	+	final BlockingQueue<Integer> q = populatedQueue(SIZE);
455	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
456	+	Thread t = newStartedThread(new CheckedRunnable() {
457	+	public void realRun() throws InterruptedException {
458	+	long startTime = System.nanoTime();
459	+	for (int i = 0; i < SIZE; i++)
460	+	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
461
462	<	public void testPeek(){
462	>	Thread.currentThread().interrupt();
463	>	try {
464	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
465	>	shouldThrow();
466	>	} catch (InterruptedException success) {}
467	>	assertFalse(Thread.interrupted());
468	>
469	>	pleaseInterrupt.countDown();
470	>	try {
471	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
472	>	shouldThrow();
473	>	} catch (InterruptedException success) {}
474	>	assertFalse(Thread.interrupted());
475	>
476	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
477	>	}});
478	>
479	>	await(pleaseInterrupt);
480	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
481	>	t.interrupt();
482	>	awaitTermination(t);
483	>	checkEmpty(q);
484	>	}
485	>
486	>	/**
487	>	* peek returns next element, or null if empty
488	>	*/
489	>	public void testPeek() {
490		LinkedBlockingQueue q = populatedQueue(SIZE);
491		for (int i = 0; i < SIZE; ++i) {
492	<	assertEquals(i, ((Integer)q.peek()).intValue());
493	<	q.poll();
492	>	assertEquals(i, q.peek());
493	>	assertEquals(i, q.poll());
494		assertTrue(q.peek() == null ||
495	<	i != ((Integer)q.peek()).intValue());
495	>	!q.peek().equals(i));
496		}
497	<	assertNull(q.peek());
497	>	assertNull(q.peek());
498		}
499
500	<	public void testElement(){
500	>	/**
501	>	* element returns next element, or throws NSEE if empty
502	>	*/
503	>	public void testElement() {
504		LinkedBlockingQueue q = populatedQueue(SIZE);
505		for (int i = 0; i < SIZE; ++i) {
506	<	assertEquals(i, ((Integer)q.element()).intValue());
507	<	q.poll();
506	>	assertEquals(i, q.element());
507	>	assertEquals(i, q.poll());
508		}
509		try {
510		q.element();
511	<	fail("no such element");
512	<	}
464	<	catch (NoSuchElementException success) {}
511	>	shouldThrow();
512	>	} catch (NoSuchElementException success) {}
513		}
514
515	<	public void testRemove(){
515	>	/**
516	>	* remove removes next element, or throws NSEE if empty
517	>	*/
518	>	public void testRemove() {
519		LinkedBlockingQueue q = populatedQueue(SIZE);
520		for (int i = 0; i < SIZE; ++i) {
521	<	assertEquals(i, ((Integer)q.remove()).intValue());
521	>	assertEquals(i, q.remove());
522		}
523		try {
524		q.remove();
525	<	fail("remove should throw");
526	<	} catch (NoSuchElementException success){
476	<	}
525	>	shouldThrow();
526	>	} catch (NoSuchElementException success) {}
527		}
528
529	<	public void testRemoveElement(){
530	<	LinkedBlockingQueue q = populatedQueue(SIZE);
531	<	for (int i = 1; i < SIZE; i+=2) {
532	<	assertTrue(q.remove(new Integer(i)));
533	<	}
534	<	for (int i = 0; i < SIZE; i+=2) {
535	<	assertTrue(q.remove(new Integer(i)));
536	<	assertFalse(q.remove(new Integer(i+1)));
537	<	}
538	<	assertTrue(q.isEmpty());
529	>	/**
530	>	* An add following remove(x) succeeds
531	>	*/
532	>	public void testRemoveElementAndAdd() throws InterruptedException {
533	>	LinkedBlockingQueue q = new LinkedBlockingQueue();
534	>	assertTrue(q.add(new Integer(1)));
535	>	assertTrue(q.add(new Integer(2)));
536	>	assertTrue(q.remove(new Integer(1)));
537	>	assertTrue(q.remove(new Integer(2)));
538	>	assertTrue(q.add(new Integer(3)));
539	>	assertNotNull(q.take());
540		}
541	<
542	<	public void testContains(){
541	>
542	>	/**
543	>	* contains(x) reports true when elements added but not yet removed
544	>	*/
545	>	public void testContains() {
546		LinkedBlockingQueue q = populatedQueue(SIZE);
547		for (int i = 0; i < SIZE; ++i) {
548		assertTrue(q.contains(new Integer(i)));
#	Line 497 | Line 551 | public class LinkedBlockingQueueTest ext
551		}
552		}
553
554	<	public void testClear(){
554	>	/**
555	>	* clear removes all elements
556	>	*/
557	>	public void testClear() {
558		LinkedBlockingQueue q = populatedQueue(SIZE);
559		q.clear();
560		assertTrue(q.isEmpty());
#	Line 505 | Line 562 | public class LinkedBlockingQueueTest ext
562		assertEquals(SIZE, q.remainingCapacity());
563		q.add(one);
564		assertFalse(q.isEmpty());
565	+	assertTrue(q.contains(one));
566		q.clear();
567		assertTrue(q.isEmpty());
568		}
569
570	<	public void testContainsAll(){
570	>	/**
571	>	* containsAll(c) is true when c contains a subset of elements
572	>	*/
573	>	public void testContainsAll() {
574		LinkedBlockingQueue q = populatedQueue(SIZE);
575		LinkedBlockingQueue p = new LinkedBlockingQueue(SIZE);
576		for (int i = 0; i < SIZE; ++i) {
#	Line 520 | Line 581 | public class LinkedBlockingQueueTest ext
581		assertTrue(p.containsAll(q));
582		}
583
584	<	public void testRetainAll(){
584	>	/**
585	>	* retainAll(c) retains only those elements of c and reports true if changed
586	>	*/
587	>	public void testRetainAll() {
588		LinkedBlockingQueue q = populatedQueue(SIZE);
589		LinkedBlockingQueue p = populatedQueue(SIZE);
590		for (int i = 0; i < SIZE; ++i) {
#	Line 531 | Line 595 | public class LinkedBlockingQueueTest ext
595		assertTrue(changed);
596
597		assertTrue(q.containsAll(p));
598	<	assertEquals(SIZE-i, q.size());
598	>	assertEquals(SIZE - i, q.size());
599		p.remove();
600		}
601		}
602
603	<	public void testRemoveAll(){
603	>	/**
604	>	* removeAll(c) removes only those elements of c and reports true if changed
605	>	*/
606	>	public void testRemoveAll() {
607		for (int i = 1; i < SIZE; ++i) {
608		LinkedBlockingQueue q = populatedQueue(SIZE);
609		LinkedBlockingQueue p = populatedQueue(i);
610		assertTrue(q.removeAll(p));
611	<	assertEquals(SIZE-i, q.size());
611	>	assertEquals(SIZE - i, q.size());
612		for (int j = 0; j < i; ++j) {
613	<	Integer I = (Integer)(p.remove());
614	<	assertFalse(q.contains(I));
613	>	Integer x = (Integer)(p.remove());
614	>	assertFalse(q.contains(x));
615		}
616		}
617		}
618
619	+	/**
620	+	* toArray contains all elements in FIFO order
621	+	*/
622	+	public void testToArray() {
623	+	LinkedBlockingQueue q = populatedQueue(SIZE);
624	+	Object[] o = q.toArray();
625	+	for (int i = 0; i < o.length; i++)
626	+	assertSame(o[i], q.poll());
627	+	}
628	+
629	+	/**
630	+	* toArray(a) contains all elements in FIFO order
631	+	*/
632	+	public void testToArray2() throws InterruptedException {
633	+	LinkedBlockingQueue<Integer> q = populatedQueue(SIZE);
634	+	Integer[] ints = new Integer[SIZE];
635	+	Integer[] array = q.toArray(ints);
636	+	assertSame(ints, array);
637	+	for (int i = 0; i < ints.length; i++)
638	+	assertSame(ints[i], q.poll());
639	+	}
640
641	<	public void testToArray(){
641	>	/**
642	>	* toArray(incompatible array type) throws ArrayStoreException
643	>	*/
644	>	public void testToArray1_BadArg() {
645		LinkedBlockingQueue q = populatedQueue(SIZE);
646	<	Object[] o = q.toArray();
647	<	try {
648	<	for(int i = 0; i < o.length; i++)
649	<	assertEquals(o[i], q.take());
559	<	} catch (InterruptedException e){
560	<	fail("Unexpected exception");
561	<	}
562	<	}
563	<
564	<	public void testToArray2(){
565	<	LinkedBlockingQueue q = populatedQueue(SIZE);
566	<	Integer[] ints = new Integer[SIZE];
567	<	ints = (Integer[])q.toArray(ints);
568	<	try {
569	<	for(int i = 0; i < ints.length; i++)
570	<	assertEquals(ints[i], q.take());
571	<	} catch (InterruptedException e){
572	<	fail("Unexpected exception");
573	<	}
574	<	}
575	<
576	<	public void testIterator(){
577	<	LinkedBlockingQueue q = populatedQueue(SIZE);
578	<	Iterator it = q.iterator();
579	<	try {
580	<	while(it.hasNext()){
581	<	assertEquals(it.next(), q.take());
582	<	}
583	<	} catch (InterruptedException e){
584	<	fail("Unexpected exception");
585	<	}
646	>	try {
647	>	q.toArray(new String[10]);
648	>	shouldThrow();
649	>	} catch (ArrayStoreException success) {}
650		}
651
652	<	public void testIteratorOrdering() {
652	>	/**
653	>	* iterator iterates through all elements
654	>	*/
655	>	public void testIterator() throws InterruptedException {
656	>	LinkedBlockingQueue q = populatedQueue(SIZE);
657	>	Iterator it = q.iterator();
658	>	int i;
659	>	for (i = 0; it.hasNext(); i++)
660	>	assertTrue(q.contains(it.next()));
661	>	assertEquals(i, SIZE);
662	>	assertIteratorExhausted(it);
663	>
664	>	it = q.iterator();
665	>	for (i = 0; it.hasNext(); i++)
666	>	assertEquals(it.next(), q.take());
667	>	assertEquals(i, SIZE);
668	>	assertIteratorExhausted(it);
669	>	}
670
671	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
671	>	/**
672	>	* iterator of empty collection has no elements
673	>	*/
674	>	public void testEmptyIterator() {
675	>	assertIteratorExhausted(new LinkedBlockingQueue().iterator());
676	>	}
677
678	<	q.add(one);
678	>	/**
679	>	* iterator.remove removes current element
680	>	*/
681	>	public void testIteratorRemove() {
682	>	final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
683		q.add(two);
684	+	q.add(one);
685		q.add(three);
686
687	<	assertEquals("queue should be full", 0, q.remainingCapacity());
687	>	Iterator it = q.iterator();
688	>	it.next();
689	>	it.remove();
690	>
691	>	it = q.iterator();
692	>	assertSame(it.next(), one);
693	>	assertSame(it.next(), three);
694	>	assertFalse(it.hasNext());
695	>	}
696
697	+	/**
698	+	* iterator ordering is FIFO
699	+	*/
700	+	public void testIteratorOrdering() {
701	+	final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
702	+	q.add(one);
703	+	q.add(two);
704	+	q.add(three);
705	+	assertEquals(0, q.remainingCapacity());
706		int k = 0;
707		for (Iterator it = q.iterator(); it.hasNext();) {
708	<	int i = ((Integer)(it.next())).intValue();
601	<	assertEquals("items should come out in order", ++k, i);
708	>	assertEquals(++k, it.next());
709		}
710	<
604	<	assertEquals("should go through 3 elements", 3, k);
710	>	assertEquals(3, k);
711		}
712
713	<	public void testWeaklyConsistentIteration () {
714	<
713	>	/**
714	>	* Modifications do not cause iterators to fail
715	>	*/
716	>	public void testWeaklyConsistentIteration() {
717		final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
610	–
718		q.add(one);
719		q.add(two);
720		q.add(three);
721	<
722	<	try {
723	<	for (Iterator it = q.iterator(); it.hasNext();) {
617	<	q.remove();
618	<	it.next();
619	<	}
620	<	}
621	<	catch (ConcurrentModificationException e) {
622	<	fail("weakly consistent iterator; should not get CME");
721	>	for (Iterator it = q.iterator(); it.hasNext();) {
722	>	q.remove();
723	>	it.next();
724		}
725	<
625	<	assertEquals("queue should be empty again", 0, q.size());
725	>	assertEquals(0, q.size());
726		}
727
728	<
729	<	public void testToString(){
728	>	/**
729	>	* toString contains toStrings of elements
730	>	*/
731	>	public void testToString() {
732		LinkedBlockingQueue q = populatedQueue(SIZE);
733		String s = q.toString();
734		for (int i = 0; i < SIZE; ++i) {
735	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
735	>	assertTrue(s.contains(String.valueOf(i)));
736		}
737	<	}
636	<
737	>	}
738
739	+	/**
740	+	* offer transfers elements across Executor tasks
741	+	*/
742		public void testOfferInExecutor() {
639	–
743		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
641	–
744		q.add(one);
745		q.add(two);
746	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
747	+	final ExecutorService executor = Executors.newFixedThreadPool(2);
748	+	try (PoolCleaner cleaner = cleaner(executor)) {
749	+	executor.execute(new CheckedRunnable() {
750	+	public void realRun() throws InterruptedException {
751	+	assertFalse(q.offer(three));
752	+	threadsStarted.await();
753	+	assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS));
754	+	assertEquals(0, q.remainingCapacity());
755	+	}});
756
757	<	ExecutorService executor = Executors.newFixedThreadPool(2);
758	<
759	<	executor.execute(new Runnable() {
760	<	public void run() {
761	<	threadAssertFalse(q.offer(three));
762	<	try {
651	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
652	<	threadAssertEquals(0, q.remainingCapacity());
653	<	}
654	<	catch (InterruptedException e) {
655	<	threadFail("should not be interrupted");
656	<	}
657	<	}
658	<	});
659	<
660	<	executor.execute(new Runnable() {
661	<	public void run() {
662	<	try {
663	<	Thread.sleep(SMALL_DELAY_MS);
664	<	threadAssertEquals(one, q.take());
665	<	}
666	<	catch (InterruptedException e) {
667	<	threadFail("should not be interrupted");
668	<	}
669	<	}
670	<	});
671	<
672	<	joinPool(executor);
673	<
757	>	executor.execute(new CheckedRunnable() {
758	>	public void realRun() throws InterruptedException {
759	>	threadsStarted.await();
760	>	assertSame(one, q.take());
761	>	}});
762	>	}
763		}
764
765	+	/**
766	+	* timed poll retrieves elements across Executor threads
767	+	*/
768		public void testPollInExecutor() {
677	–
769		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
770	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
771	+	final ExecutorService executor = Executors.newFixedThreadPool(2);
772	+	try (PoolCleaner cleaner = cleaner(executor)) {
773	+	executor.execute(new CheckedRunnable() {
774	+	public void realRun() throws InterruptedException {
775	+	assertNull(q.poll());
776	+	threadsStarted.await();
777	+	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
778	+	checkEmpty(q);
779	+	}});
780
781	<	ExecutorService executor = Executors.newFixedThreadPool(2);
782	<
783	<	executor.execute(new Runnable() {
683	<	public void run() {
684	<	threadAssertNull(q.poll());
685	<	try {
686	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
687	<	threadAssertTrue(q.isEmpty());
688	<	}
689	<	catch (InterruptedException e) {
690	<	threadFail("should not be interrupted");
691	<	}
692	<	}
693	<	});
694	<
695	<	executor.execute(new Runnable() {
696	<	public void run() {
697	<	try {
698	<	Thread.sleep(SMALL_DELAY_MS);
781	>	executor.execute(new CheckedRunnable() {
782	>	public void realRun() throws InterruptedException {
783	>	threadsStarted.await();
784		q.put(one);
785	<	}
786	<	catch (InterruptedException e) {
702	<	threadFail("should not be interrupted");
703	<	}
704	<	}
705	<	});
706	<
707	<	joinPool(executor);
785	>	}});
786	>	}
787		}
788
789	<	public void testSerialization() {
789	>	/**
790	>	* A deserialized serialized queue has same elements in same order
791	>	*/
792	>	public void testSerialization() throws Exception {
793	>	Queue x = populatedQueue(SIZE);
794	>	Queue y = serialClone(x);
795	>
796	>	assertNotSame(x, y);
797	>	assertEquals(x.size(), y.size());
798	>	assertEquals(x.toString(), y.toString());
799	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
800	>	while (!x.isEmpty()) {
801	>	assertFalse(y.isEmpty());
802	>	assertEquals(x.remove(), y.remove());
803	>	}
804	>	assertTrue(y.isEmpty());
805	>	}
806	>
807	>	/**
808	>	* drainTo(c) empties queue into another collection c
809	>	*/
810	>	public void testDrainTo() {
811		LinkedBlockingQueue q = populatedQueue(SIZE);
812	+	ArrayList l = new ArrayList();
813	+	q.drainTo(l);
814	+	assertEquals(0, q.size());
815	+	assertEquals(SIZE, l.size());
816	+	for (int i = 0; i < SIZE; ++i)
817	+	assertEquals(l.get(i), new Integer(i));
818	+	q.add(zero);
819	+	q.add(one);
820	+	assertFalse(q.isEmpty());
821	+	assertTrue(q.contains(zero));
822	+	assertTrue(q.contains(one));
823	+	l.clear();
824	+	q.drainTo(l);
825	+	assertEquals(0, q.size());
826	+	assertEquals(2, l.size());
827	+	for (int i = 0; i < 2; ++i)
828	+	assertEquals(l.get(i), new Integer(i));
829	+	}
830
831	<	try {
832	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
833	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
834	<	out.writeObject(q);
835	<	out.close();
831	>	/**
832	>	* drainTo empties full queue, unblocking a waiting put.
833	>	*/
834	>	public void testDrainToWithActivePut() throws InterruptedException {
835	>	final LinkedBlockingQueue q = populatedQueue(SIZE);
836	>	Thread t = new Thread(new CheckedRunnable() {
837	>	public void realRun() throws InterruptedException {
838	>	q.put(new Integer(SIZE + 1));
839	>	}});
840	>
841	>	t.start();
842	>	ArrayList l = new ArrayList();
843	>	q.drainTo(l);
844	>	assertTrue(l.size() >= SIZE);
845	>	for (int i = 0; i < SIZE; ++i)
846	>	assertEquals(l.get(i), new Integer(i));
847	>	t.join();
848	>	assertTrue(q.size() + l.size() >= SIZE);
849	>	}
850	>
851	>	/**
852	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
853	>	*/
854	>	public void testDrainToN() {
855	>	LinkedBlockingQueue q = new LinkedBlockingQueue();
856	>	for (int i = 0; i < SIZE + 2; ++i) {
857	>	for (int j = 0; j < SIZE; j++)
858	>	assertTrue(q.offer(new Integer(j)));
859	>	ArrayList l = new ArrayList();
860	>	q.drainTo(l, i);
861	>	int k = (i < SIZE) ? i : SIZE;
862	>	assertEquals(k, l.size());
863	>	assertEquals(SIZE - k, q.size());
864	>	for (int j = 0; j < k; ++j)
865	>	assertEquals(l.get(j), new Integer(j));
866	>	do {} while (q.poll() != null);
867	>	}
868	>	}
869
870	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
871	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
872	<	LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject();
873	<	assertEquals(q.size(), r.size());
874	<	while (!q.isEmpty())
875	<	assertEquals(q.remove(), r.remove());
876	<	} catch(Exception e){
877	<	e.printStackTrace();
878	<	fail("unexpected exception");
870	>	/**
871	>	* remove(null), contains(null) always return false
872	>	*/
873	>	public void testNeverContainsNull() {
874	>	Collection<?>[] qs = {
875	>	new LinkedBlockingQueue<Object>(),
876	>	populatedQueue(2),
877	>	};
878	>
879	>	for (Collection<?> q : qs) {
880	>	assertFalse(q.contains(null));
881	>	assertFalse(q.remove(null));
882		}
883		}
884

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