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

Comparing jsr166/src/test/tck/LinkedBlockingQueueTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 20:39:11 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.*;
13	<
14	<	public class LinkedBlockingQueueTest extends TestCase {
15	<
16	<	private static int N = 10;
17	<	private static long SHORT_DELAY_MS = 100;
18	<	private static long MEDIUM_DELAY_MS = 1000;
19	<	private static long LONG_DELAY_MS = 10000;
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
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 fullQueue(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(){
75	<	assertEquals(N, new LinkedBlockingQueue(N).remainingCapacity());
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	<	}
52	<	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	<	}
61	<	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[N];
110	<	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
111	<	fail("Cannot make with null elements");
69	<	}
70	<	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[N];
117	<	for (int i = 0; i < N-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[N];
132	<	for (int i = 0; i < N; ++i)
133	<	ints[i] = new Integer(i);
134	<	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
135	<	for (int i = 0; i < N; ++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());
147		assertEquals("should have room for 2", 2, q.remainingCapacity());
148	<	q.add(new Integer(1));
148	>	q.add(one);
149		assertFalse(q.isEmpty());
150	<	q.add(new Integer(2));
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(new Integer(3)));
152	>	assertEquals(0, q.remainingCapacity());
153	>	assertFalse(q.offer(three));
154		}
155
156	<	public void testRemainingCapacity(){
157	<	LinkedBlockingQueue q = fullQueue(N);
158	<	for (int i = 0; i < N; ++i) {
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(N-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 < N; ++i) {
167	<	assertEquals(N-i, q.remainingCapacity());
168	<	assertEquals(i, q.size());
169	<	q.add(new Integer(i));
166	>	for (int i = 0; i < SIZE; ++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);
177	<	fail("should throw NPE");
178	<	} catch (NullPointerException success) { }
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 testOffer(){
183	<	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
184	<	assertTrue(q.offer(new Integer(0)));
185	<	assertFalse(q.offer(new Integer(1)));
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	>	shouldThrow();
193	>	} catch (IllegalStateException success) {}
194		}
195
196	<	public void testAdd(){
197	<	try {
198	<	LinkedBlockingQueue q = new LinkedBlockingQueue(N);
199	<	for (int i = 0; i < N; ++i) {
200	<	assertTrue(q.add(new Integer(i)));
201	<	}
202	<	assertEquals(0, q.remainingCapacity());
203	<	q.add(new Integer(N));
204	<	} catch (IllegalStateException success){
205	<	}
206	<	}
207	<
208	<	public void testAddAll1(){
209	<	try {
210	<	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
211	<	q.addAll(null);
212	<	fail("Cannot add null collection");
213	<	}
214	<	catch (NullPointerException success) {}
215	<	}
216	<	public void testAddAll2(){
217	<	try {
218	<	LinkedBlockingQueue q = new LinkedBlockingQueue(N);
219	<	Integer[] ints = new Integer[N];
220	<	q.addAll(Arrays.asList(ints));
221	<	fail("Cannot add null elements");
222	<	}
223	<	catch (NullPointerException success) {}
224	<	}
225	<	public void testAddAll3(){
226	<	try {
227	<	LinkedBlockingQueue q = new LinkedBlockingQueue(N);
228	<	Integer[] ints = new Integer[N];
229	<	for (int i = 0; i < N-1; ++i)
230	<	ints[i] = new Integer(i);
231	<	q.addAll(Arrays.asList(ints));
232	<	fail("Cannot add null elements");
233	<	}
234	<	catch (NullPointerException success) {}
235	<	}
236	<	public void testAddAll4(){
237	<	try {
238	<	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
239	<	Integer[] ints = new Integer[N];
240	<	for (int i = 0; i < N; ++i)
241	<	ints[i] = new Integer(i);
242	<	q.addAll(Arrays.asList(ints));
243	<	fail("Cannot add with insufficient capacity");
244	<	}
245	<	catch (IllegalStateException success) {}
246	<	}
247	<	public void testAddAll5(){
248	<	try {
249	<	Integer[] empty = new Integer[0];
250	<	Integer[] ints = new Integer[N];
251	<	for (int i = 0; i < N; ++i)
252	<	ints[i] = new Integer(i);
253	<	LinkedBlockingQueue q = new LinkedBlockingQueue(N);
254	<	assertFalse(q.addAll(Arrays.asList(empty)));
255	<	assertTrue(q.addAll(Arrays.asList(ints)));
256	<	for (int i = 0; i < N; ++i)
257	<	assertEquals(ints[i], q.poll());
258	<	}
259	<	finally {}
260	<	}
261	<
202	<	public void testPutNull() {
203	<	try {
204	<	LinkedBlockingQueue q = new LinkedBlockingQueue(N);
205	<	q.put(null);
206	<	fail("put should throw NPE");
207	<	}
208	<	catch (NullPointerException success){
209	<	}
210	<	catch (InterruptedException ie) {
211	<	fail("Unexpected exception");
212	<	}
213	<	}
214	<
215	<	public void testPut() {
216	<	try {
217	<	LinkedBlockingQueue q = new LinkedBlockingQueue(N);
218	<	for (int i = 0; i < N; ++i) {
219	<	Integer I = new Integer(i);
220	<	q.put(I);
221	<	assertTrue(q.contains(I));
222	<	}
223	<	assertEquals(0, q.remainingCapacity());
224	<	}
225	<	catch (InterruptedException ie) {
226	<	fail("Unexpected exception");
227	<	}
228	<	}
229	<
230	<	public void testBlockingPut(){
231	<	Thread t = new Thread(new Runnable() {
232	<	public void run() {
233	<	int added = 0;
234	<	try {
235	<	LinkedBlockingQueue q = new LinkedBlockingQueue(N);
236	<	for (int i = 0; i < N; ++i) {
237	<	q.put(new Integer(i));
238	<	++added;
239	<	}
240	<	q.put(new Integer(N));
241	<	fail("put should block");
242	<	} catch (InterruptedException ie){
243	<	assertEquals(added, N);
244	<	}
245	<	}});
246	<	t.start();
247	<	try {
248	<	Thread.sleep(SHORT_DELAY_MS);
249	<	t.interrupt();
250	<	t.join();
251	<	}
252	<	catch (InterruptedException ie) {
253	<	fail("Unexpected exception");
196	>	/**
197	>	* addAll(this) throws IllegalArgumentException
198	>	*/
199	>	public void testAddAllSelf() {
200	>	LinkedBlockingQueue q = populatedQueue(SIZE);
201	>	try {
202	>	q.addAll(q);
203	>	shouldThrow();
204	>	} catch (IllegalArgumentException success) {}
205	>	}
206	>
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	>	/**
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	>	/**
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	>	/**
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	+	/**
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	<	public void testPutWithTake() {
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	<	Thread t = new Thread(new Runnable() {
309	<	public void run(){
310	<	int added = 0;
311	<	try {
312	<	q.put(new Object());
313	<	++added;
314	<	q.put(new Object());
315	<	++added;
316	<	q.put(new Object());
317	<	++added;
318	<	q.put(new Object());
319	<	++added;
320	<	fail("Should block");
321	<	} catch (InterruptedException e){
322	<	assertTrue(added >= 2);
323	<	}
324	<	}
325	<	});
326	<	try {
327	<	t.start();
328	<	Thread.sleep(SHORT_DELAY_MS);
329	<	q.take();
330	<	t.interrupt();
331	<	t.join();
332	<	} catch (Exception e){
333	<	fail("Unexpected exception");
334	<	}
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	<	Thread t = new Thread(new Runnable() {
349	<	public void run(){
350	<	try {
351	<	q.put(new Object());
352	<	q.put(new Object());
353	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
354	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
355	<	fail("Should block");
356	<	} catch (InterruptedException success){}
357	<	}
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	<	}
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 testTake(){
371	<	try {
372	<	LinkedBlockingQueue q = fullQueue(N);
373	<	for (int i = 0; i < N; ++i) {
374	<	assertEquals(i, ((Integer)q.take()).intValue());
375	<	}
376	<	} catch (InterruptedException e){
377	<	fail("Unexpected exception");
320	<	}
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, q.take());
377	>	}
378		}
379
380	<	public void testTakeFromEmpty() {
381	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
382	<	Thread t = new Thread(new Runnable() {
383	<	public void run(){
384	<	try {
385	<	q.take();
386	<	fail("Should block");
387	<	} catch (InterruptedException success){ }
388	<	}
389	<	});
390	<	try {
391	<	t.start();
392	<	Thread.sleep(SHORT_DELAY_MS);
393	<	t.interrupt();
394	<	t.join();
395	<	} catch (Exception e){
396	<	fail("Unexpected exception");
397	<	}
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 testBlockingTake(){
412	<	Thread t = new Thread(new Runnable() {
413	<	public void run() {
414	<	try {
415	<	LinkedBlockingQueue q = fullQueue(N);
416	<	for (int i = 0; i < N; ++i) {
417	<	assertEquals(i, ((Integer)q.take()).intValue());
350	<	}
351	<	q.take();
352	<	fail("take should block");
353	<	} catch (InterruptedException success){
354	<	}
355	<	}});
356	<	t.start();
357	<	try {
358	<	Thread.sleep(SHORT_DELAY_MS);
359	<	t.interrupt();
360	<	t.join();
361	<	}
362	<	catch (InterruptedException ie) {
363	<	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	<
423	<	public void testPoll(){
424	<	LinkedBlockingQueue q = fullQueue(N);
425	<	for (int i = 0; i < N; ++i) {
426	<	assertEquals(i, ((Integer)q.poll()).intValue());
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	<	assertNull(q.poll());
430	>	assertNull(q.poll(0, MILLISECONDS));
431		}
432
433	<	public void testTimedPoll0() {
434	<	try {
435	<	LinkedBlockingQueue q = fullQueue(N);
436	<	for (int i = 0; i < N; ++i) {
437	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
438	<	}
439	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
440	<	} catch (InterruptedException e){
441	<	fail("Unexpected exception");
442	<	}
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	<	public void testTimedPoll() {
450	<	try {
451	<	LinkedBlockingQueue q = fullQueue(N);
452	<	for (int i = 0; i < N; ++i) {
453	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
454	<	}
455	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
456	<	} catch (InterruptedException e){
457	<	fail("Unexpected exception");
458	<	}
459	<	}
460	<
461	<	public void testInterruptedTimedPoll(){
462	<	Thread t = new Thread(new Runnable() {
463	<	public void run() {
464	<	try {
465	<	LinkedBlockingQueue q = fullQueue(N);
466	<	for (int i = 0; i < N; ++i) {
467	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
468	<	}
469	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
470	<	} catch (InterruptedException success){
471	<	}
472	<	}});
473	<	t.start();
474	<	try {
475	<	Thread.sleep(SHORT_DELAY_MS);
476	<	t.interrupt();
477	<	t.join();
478	<	}
479	<	catch (InterruptedException ie) {
480	<	fail("Unexpected exception");
481	<	}
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	>	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	<	public void testTimedPollWithOffer(){
487	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
488	<	Thread t = new Thread(new Runnable() {
489	<	public void run(){
490	<	try {
491	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
492	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
493	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
431	<	fail("Should block");
432	<	} catch (InterruptedException success) { }
433	<	}
434	<	});
435	<	try {
436	<	t.start();
437	<	Thread.sleep(SHORT_DELAY_MS * 2);
438	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
439	<	t.interrupt();
440	<	t.join();
441	<	} catch (Exception e){
442	<	fail("Unexpected exception");
443	<	}
444	<	}
445	<
446	<
447	<	public void testPeek(){
448	<	LinkedBlockingQueue q = fullQueue(N);
449	<	for (int i = 0; i < N; ++i) {
450	<	assertEquals(i, ((Integer)q.peek()).intValue());
451	<	q.poll();
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, 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(){
501	<	LinkedBlockingQueue q = fullQueue(N);
502	<	for (int i = 0; i < N; ++i) {
503	<	assertEquals(i, ((Integer)q.element()).intValue());
504	<	q.poll();
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, q.element());
507	>	assertEquals(i, q.poll());
508		}
509		try {
510		q.element();
511	<	fail("no such element");
512	<	}
468	<	catch (NoSuchElementException success) {}
511	>	shouldThrow();
512	>	} catch (NoSuchElementException success) {}
513		}
514
515	<	public void testRemove(){
516	<	LinkedBlockingQueue q = fullQueue(N);
517	<	for (int i = 0; i < N; ++i) {
518	<	assertEquals(i, ((Integer)q.remove()).intValue());
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, q.remove());
522		}
523		try {
524		q.remove();
525	<	fail("remove should throw");
526	<	} catch (NoSuchElementException success){
480	<	}
525	>	shouldThrow();
526	>	} catch (NoSuchElementException success) {}
527		}
528
529	<	public void testRemoveElement(){
530	<	LinkedBlockingQueue q = fullQueue(N);
531	<	for (int i = 1; i < N; i+=2) {
532	<	assertTrue(q.remove(new Integer(i)));
533	<	}
534	<	for (int i = 0; i < N; 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(){
543	<	LinkedBlockingQueue q = fullQueue(N);
544	<	for (int i = 0; i < N; ++i) {
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)));
549		q.poll();
550		assertFalse(q.contains(new Integer(i)));
551		}
552		}
553
554	<	public void testClear(){
555	<	LinkedBlockingQueue q = fullQueue(N);
554	>	/**
555	>	* clear removes all elements
556	>	*/
557	>	public void testClear() {
558	>	LinkedBlockingQueue q = populatedQueue(SIZE);
559		q.clear();
560		assertTrue(q.isEmpty());
561		assertEquals(0, q.size());
562	<	assertEquals(N, q.remainingCapacity());
563	<	q.add(new Integer(1));
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(){
571	<	LinkedBlockingQueue q = fullQueue(N);
572	<	LinkedBlockingQueue p = new LinkedBlockingQueue(N);
573	<	for (int i = 0; i < N; ++i) {
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) {
577		assertTrue(q.containsAll(p));
578		assertFalse(p.containsAll(q));
579		p.add(new Integer(i));
#	Line 524 | Line 581 | public class LinkedBlockingQueueTest ext
581		assertTrue(p.containsAll(q));
582		}
583
584	<	public void testRetainAll(){
585	<	LinkedBlockingQueue q = fullQueue(N);
586	<	LinkedBlockingQueue p = fullQueue(N);
587	<	for (int i = 0; i < N; ++i) {
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) {
591		boolean changed = q.retainAll(p);
592		if (i == 0)
593		assertFalse(changed);
#	Line 535 | Line 595 | public class LinkedBlockingQueueTest ext
595		assertTrue(changed);
596
597		assertTrue(q.containsAll(p));
598	<	assertEquals(N-i, q.size());
598	>	assertEquals(SIZE - i, q.size());
599		p.remove();
600		}
601		}
602
603	<	public void testRemoveAll(){
604	<	for (int i = 1; i < N; ++i) {
605	<	LinkedBlockingQueue q = fullQueue(N);
606	<	LinkedBlockingQueue p = fullQueue(i);
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(N-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	<	public void testToArray(){
630	<	LinkedBlockingQueue q = fullQueue(N);
631	<	Object[] o = q.toArray();
632	<	try {
633	<	for(int i = 0; i < o.length; i++)
634	<	assertEquals(o[i], q.take());
635	<	} catch (InterruptedException e){
636	<	fail("Unexpected exception");
637	<	}
638	<	}
567	<
568	<	public void testToArray2(){
569	<	LinkedBlockingQueue q = fullQueue(N);
570	<	Integer[] ints = new Integer[N];
571	<	ints = (Integer[])q.toArray(ints);
572	<	try {
573	<	for(int i = 0; i < ints.length; i++)
574	<	assertEquals(ints[i], q.take());
575	<	} catch (InterruptedException e){
576	<	fail("Unexpected exception");
577	<	}
578	<	}
579	<
580	<	public void testIterator(){
581	<	LinkedBlockingQueue q = fullQueue(N);
582	<	Iterator it = q.iterator();
583	<	try {
584	<	while(it.hasNext()){
585	<	assertEquals(it.next(), q.take());
586	<	}
587	<	} catch (InterruptedException e){
588	<	fail("Unexpected exception");
589	<	}
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 testIteratorOrdering() {
641	>	/**
642	>	* toArray(incompatible array type) throws ArrayStoreException
643	>	*/
644	>	public void testToArray1_BadArg() {
645	>	LinkedBlockingQueue q = populatedQueue(SIZE);
646	>	try {
647	>	q.toArray(new String[10]);
648	>	shouldThrow();
649	>	} catch (ArrayStoreException success) {}
650	>	}
651
652	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
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	<	q.add(new Integer(1));
672	<	q.add(new Integer(2));
673	<	q.add(new Integer(3));
671	>	/**
672	>	* iterator of empty collection has no elements
673	>	*/
674	>	public void testEmptyIterator() {
675	>	assertIteratorExhausted(new LinkedBlockingQueue().iterator());
676	>	}
677
678	<	assertEquals("queue should be full", 0, q.remainingCapacity());
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	>	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();
605	<	assertEquals("items should come out in order", ++k, i);
708	>	assertEquals(++k, it.next());
709		}
710	<
608	<	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);
718	<
719	<	q.add(new Integer(1));
720	<	q.add(new Integer(2));
721	<	q.add(new Integer(3));
722	<
723	<	try {
620	<	for (Iterator it = q.iterator(); it.hasNext();) {
621	<	q.remove();
622	<	it.next();
623	<	}
624	<	}
625	<	catch (ConcurrentModificationException e) {
626	<	fail("weakly consistent iterator; should not get CME");
718	>	q.add(one);
719	>	q.add(two);
720	>	q.add(three);
721	>	for (Iterator it = q.iterator(); it.hasNext();) {
722	>	q.remove();
723	>	it.next();
724		}
725	<
629	<	assertEquals("queue should be empty again", 0, q.size());
725	>	assertEquals(0, q.size());
726		}
727
728	<
729	<	public void testToString(){
730	<	LinkedBlockingQueue q = fullQueue(N);
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 < N; ++i) {
735	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
734	>	for (int i = 0; i < SIZE; ++i) {
735	>	assertTrue(s.contains(String.valueOf(i)));
736		}
737	<	}
640	<
737	>	}
738
739	+	/**
740	+	* offer transfers elements across Executor tasks
741	+	*/
742		public void testOfferInExecutor() {
643	–
743		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
744	<
745	<	q.add(new Integer(1));
746	<	q.add(new Integer(2));
747	<
748	<	ExecutorService executor = Executors.newFixedThreadPool(2);
749	<
750	<	executor.execute(new Runnable() {
751	<	public void run() {
752	<	assertFalse("offer should be rejected", q.offer(new Integer(3)));
753	<	try {
655	<	assertTrue("offer should be accepted", q.offer(new Integer(3), MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
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	<	}
658	<	catch (InterruptedException e) {
659	<	fail("should not be interrupted");
660	<	}
661	<	}
662	<	});
663	<
664	<	executor.execute(new Runnable() {
665	<	public void run() {
666	<	try {
667	<	Thread.sleep(MEDIUM_DELAY_MS);
668	<	assertEquals("first item in queue should be 1", new Integer(1), q.take());
669	<	}
670	<	catch (InterruptedException e) {
671	<	fail("should not be interrupted");
672	<	}
673	<	}
674	<	});
675	<
676	<	executor.shutdown();
755	>	}});
756
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() {
681	–
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);
781	>	executor.execute(new CheckedRunnable() {
782	>	public void realRun() throws InterruptedException {
783	>	threadsStarted.await();
784	>	q.put(one);
785	>	}});
786	>	}
787	>	}
788
789	<	executor.execute(new Runnable() {
790	<	public void run() {
791	<	assertNull("poll should fail", q.poll());
792	<	try {
793	<	assertTrue(null != q.poll(MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
794	<	assertTrue(q.isEmpty());
795	<	}
796	<	catch (InterruptedException e) {
797	<	fail("should not be interrupted");
798	<	}
799	<	}
800	<	});
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	<	executor.execute(new Runnable() {
808	<	public void run() {
809	<	try {
810	<	Thread.sleep(MEDIUM_DELAY_MS);
811	<	q.put(new Integer(1));
812	<	}
813	<	catch (InterruptedException e) {
814	<	fail("should not be interrupted");
815	<	}
816	<	}
817	<	});
818	<
819	<	executor.shutdown();
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	+	/**
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	<	public void testSerialization() {
852	<	LinkedBlockingQueue q = fullQueue(N);
853	<
854	<	try {
855	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
856	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
857	<	out.writeObject(q);
858	<	out.close();
859	<
860	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
861	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
862	<	LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject();
863	<	assertEquals(q.size(), r.size());
864	<	while (!q.isEmpty())
865	<	assertEquals(q.remove(), r.remove());
866	<	} catch(Exception e){
867	<	e.printStackTrace();
868	<	fail("unexpected exception");
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	>	/**
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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