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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 1.81 by jsr166, Thu Sep 5 21:11:13 2019 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import 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 = new LinkedBlockingQueue<>(n);
63		assertTrue(q.isEmpty());
64	<	for(int i = 0; i < n; i++)
65	<	assertTrue(q.offer(new Integer(i)));
64	>	for (int i = 0; i < n; i++)
65	>	assertTrue(q.offer(new Integer(i)));
66		assertFalse(q.isEmpty());
67		assertEquals(0, q.remainingCapacity());
68	<	assertEquals(n, q.size());
68	>	assertEquals(n, q.size());
69	>	assertEquals((Integer) 0, q.peek());
70		return q;
71		}
72	<
73	<	public void testConstructor1(){
72	>
73	>	/**
74	>	* A new queue has the indicated capacity, or Integer.MAX_VALUE if
75	>	* none given
76	>	*/
77	>	public void testConstructor1() {
78		assertEquals(SIZE, new LinkedBlockingQueue(SIZE).remainingCapacity());
79	+	assertEquals(Integer.MAX_VALUE, new LinkedBlockingQueue().remainingCapacity());
80		}
81
82	<	public void testConstructor2(){
82	>	/**
83	>	* Constructor throws IllegalArgumentException if capacity argument nonpositive
84	>	*/
85	>	public void testConstructor2() {
86		try {
87	<	LinkedBlockingQueue q = new LinkedBlockingQueue(0);
88	<	fail("Cannot make zero-sized");
89	<	}
48	<	catch (IllegalArgumentException success) {}
87	>	new LinkedBlockingQueue(0);
88	>	shouldThrow();
89	>	} catch (IllegalArgumentException success) {}
90		}
91
92	<	public void testConstructor3(){
93	<
92	>	/**
93	>	* Initializing from null Collection throws NullPointerException
94	>	*/
95	>	public void testConstructor3() {
96		try {
97	<	LinkedBlockingQueue q = new LinkedBlockingQueue(null);
98	<	fail("Cannot make from null collection");
99	<	}
57	<	catch (NullPointerException success) {}
97	>	new LinkedBlockingQueue(null);
98	>	shouldThrow();
99	>	} catch (NullPointerException success) {}
100		}
101
102	<	public void testConstructor4(){
102	>	/**
103	>	* Initializing from Collection of null elements throws NullPointerException
104	>	*/
105	>	public void testConstructor4() {
106	>	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
107		try {
108	<	Integer[] ints = new Integer[SIZE];
109	<	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
110	<	fail("Cannot make with null elements");
65	<	}
66	<	catch (NullPointerException success) {}
108	>	new LinkedBlockingQueue(elements);
109	>	shouldThrow();
110	>	} catch (NullPointerException success) {}
111		}
112
113	<	public void testConstructor5(){
114	<	try {
115	<	Integer[] ints = new Integer[SIZE];
116	<	for (int i = 0; i < SIZE-1; ++i)
117	<	ints[i] = new Integer(i);
118	<	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
119	<	fail("Cannot make with null elements");
120	<	}
121	<	catch (NullPointerException success) {}
113	>	/**
114	>	* Initializing from Collection with some null elements throws
115	>	* NullPointerException
116	>	*/
117	>	public void testConstructor5() {
118	>	Integer[] ints = new Integer[SIZE];
119	>	for (int i = 0; i < SIZE - 1; ++i)
120	>	ints[i] = new Integer(i);
121	>	Collection<Integer> elements = Arrays.asList(ints);
122	>	try {
123	>	new LinkedBlockingQueue(elements);
124	>	shouldThrow();
125	>	} catch (NullPointerException success) {}
126		}
127
128	<	public void testConstructor6(){
129	<	try {
130	<	Integer[] ints = new Integer[SIZE];
131	<	for (int i = 0; i < SIZE; ++i)
132	<	ints[i] = new Integer(i);
133	<	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
134	<	for (int i = 0; i < SIZE; ++i)
135	<	assertEquals(ints[i], q.poll());
136	<	}
137	<	finally {}
128	>	/**
129	>	* Queue contains all elements of collection used to initialize
130	>	*/
131	>	public void testConstructor6() {
132	>	Integer[] ints = new Integer[SIZE];
133	>	for (int i = 0; i < SIZE; ++i)
134	>	ints[i] = new Integer(i);
135	>	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
136	>	for (int i = 0; i < SIZE; ++i)
137	>	assertEquals(ints[i], q.poll());
138		}
139
140	+	/**
141	+	* Queue transitions from empty to full when elements added
142	+	*/
143		public void testEmptyFull() {
144		LinkedBlockingQueue q = new LinkedBlockingQueue(2);
145		assertTrue(q.isEmpty());
#	Line 97 | Line 148 | public class LinkedBlockingQueueTest ext
148		assertFalse(q.isEmpty());
149		q.add(two);
150		assertFalse(q.isEmpty());
151	<	assertEquals("queue should be full", 0, q.remainingCapacity());
152	<	assertFalse("offer should be rejected", q.offer(three));
151	>	assertEquals(0, q.remainingCapacity());
152	>	assertFalse(q.offer(three));
153		}
154
155	<	public void testRemainingCapacity(){
156	<	LinkedBlockingQueue q = populatedQueue(SIZE);
155	>	/**
156	>	* remainingCapacity decreases on add, increases on remove
157	>	*/
158	>	public void testRemainingCapacity() {
159	>	BlockingQueue q = populatedQueue(SIZE);
160		for (int i = 0; i < SIZE; ++i) {
161		assertEquals(i, q.remainingCapacity());
162	<	assertEquals(SIZE-i, q.size());
163	<	q.remove();
162	>	assertEquals(SIZE, q.size() + q.remainingCapacity());
163	>	assertEquals(i, q.remove());
164		}
165		for (int i = 0; i < SIZE; ++i) {
166	<	assertEquals(SIZE-i, q.remainingCapacity());
167	<	assertEquals(i, q.size());
168	<	q.add(new Integer(i));
166	>	assertEquals(SIZE - i, q.remainingCapacity());
167	>	assertEquals(SIZE, q.size() + q.remainingCapacity());
168	>	assertTrue(q.add(i));
169		}
170		}
171
172	<	public void testOfferNull(){
173	<	try {
174	<	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
175	<	q.offer(null);
122	<	fail("should throw NPE");
123	<	} catch (NullPointerException success) { }
124	<	}
125	<
126	<	public void testOffer(){
172	>	/**
173	>	* Offer succeeds if not full; fails if full
174	>	*/
175	>	public void testOffer() {
176		LinkedBlockingQueue q = new LinkedBlockingQueue(1);
177		assertTrue(q.offer(zero));
178		assertFalse(q.offer(one));
179		}
180
181	<	public void testAdd(){
182	<	try {
183	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
184	<	for (int i = 0; i < SIZE; ++i) {
185	<	assertTrue(q.add(new Integer(i)));
186	<	}
187	<	assertEquals(0, q.remainingCapacity());
181	>	/**
182	>	* add succeeds if not full; throws IllegalStateException if full
183	>	*/
184	>	public void testAdd() {
185	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
186	>	for (int i = 0; i < SIZE; ++i)
187	>	assertTrue(q.add(new Integer(i)));
188	>	assertEquals(0, q.remainingCapacity());
189	>	try {
190		q.add(new Integer(SIZE));
191	<	} catch (IllegalStateException success){
192	<	}
191	>	shouldThrow();
192	>	} catch (IllegalStateException success) {}
193		}
194
195	<	public void testAddAll1(){
195	>	/**
196	>	* addAll(this) throws IllegalArgumentException
197	>	*/
198	>	public void testAddAllSelf() {
199	>	LinkedBlockingQueue q = populatedQueue(SIZE);
200		try {
201	<	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
202	<	q.addAll(null);
203	<	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	<	}
201	>	q.addAll(q);
202	>	shouldThrow();
203	>	} catch (IllegalArgumentException success) {}
204		}
205
206	<	public void testPutWithTake() {
207	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
208	<	Thread t = new Thread(new Runnable() {
209	<	public void run(){
210	<	int added = 0;
211	<	try {
212	<	q.put(new Object());
213	<	++added;
214	<	q.put(new Object());
215	<	++added;
216	<	q.put(new Object());
217	<	++added;
218	<	q.put(new Object());
219	<	++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	<	}
206	>	/**
207	>	* addAll of a collection with any null elements throws NPE after
208	>	* possibly adding some elements
209	>	*/
210	>	public void testAddAll3() {
211	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
212	>	Integer[] ints = new Integer[SIZE];
213	>	for (int i = 0; i < SIZE - 1; ++i)
214	>	ints[i] = new Integer(i);
215	>	Collection<Integer> elements = Arrays.asList(ints);
216	>	try {
217	>	q.addAll(elements);
218	>	shouldThrow();
219	>	} catch (NullPointerException success) {}
220		}
221
222	<	public void testTimedOffer() {
223	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
224	<	Thread t = new Thread(new Runnable() {
225	<	public void run(){
226	<	try {
227	<	q.put(new Object());
228	<	q.put(new Object());
229	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
230	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
231	<	threadFail("Should block");
232	<	} catch (InterruptedException success){}
233	<	}
234	<	});
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	<	}
222	>	/**
223	>	* addAll throws IllegalStateException if not enough room
224	>	*/
225	>	public void testAddAll4() {
226	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE - 1);
227	>	Integer[] ints = new Integer[SIZE];
228	>	for (int i = 0; i < SIZE; ++i)
229	>	ints[i] = new Integer(i);
230	>	Collection<Integer> elements = Arrays.asList(ints);
231	>	try {
232	>	q.addAll(elements);
233	>	shouldThrow();
234	>	} catch (IllegalStateException success) {}
235		}
236
237	<	public void testTake(){
238	<	try {
239	<	LinkedBlockingQueue q = populatedQueue(SIZE);
240	<	for (int i = 0; i < SIZE; ++i) {
241	<	assertEquals(i, ((Integer)q.take()).intValue());
242	<	}
243	<	} catch (InterruptedException e){
244	<	fail("Unexpected exception");
245	<	}
237	>	/**
238	>	* Queue contains all elements, in traversal order, of successful addAll
239	>	*/
240	>	public void testAddAll5() {
241	>	Integer[] empty = new Integer[0];
242	>	Integer[] ints = new Integer[SIZE];
243	>	for (int i = 0; i < SIZE; ++i)
244	>	ints[i] = new Integer(i);
245	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
246	>	assertFalse(q.addAll(Arrays.asList(empty)));
247	>	assertTrue(q.addAll(Arrays.asList(ints)));
248	>	for (int i = 0; i < SIZE; ++i)
249	>	assertEquals(ints[i], q.poll());
250		}
251
252	<	public void testTakeFromEmpty() {
253	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
254	<	Thread t = new Thread(new Runnable() {
255	<	public void run(){
256	<	try {
257	<	q.take();
258	<	threadFail("Should block");
259	<	} catch (InterruptedException success){ }
260	<	}
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");
252	>	/**
253	>	* all elements successfully put are contained
254	>	*/
255	>	public void testPut() throws InterruptedException {
256	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
257	>	for (int i = 0; i < SIZE; ++i) {
258	>	Integer x = new Integer(i);
259	>	q.put(x);
260	>	assertTrue(q.contains(x));
261		}
262	+	assertEquals(0, q.remainingCapacity());
263		}
264
265	<	public void testBlockingTake(){
266	<	Thread t = new Thread(new Runnable() {
267	<	public void run() {
268	<	try {
269	<	LinkedBlockingQueue q = populatedQueue(SIZE);
270	<	for (int i = 0; i < SIZE; ++i) {
271	<	assertEquals(i, ((Integer)q.take()).intValue());
272	<	}
273	<	q.take();
274	<	threadFail("take should block");
275	<	} catch (InterruptedException success){
276	<	}
277	<	}});
278	<	t.start();
279	<	try {
280	<	Thread.sleep(SHORT_DELAY_MS);
281	<	t.interrupt();
282	<	t.join();
283	<	}
284	<	catch (InterruptedException ie) {
285	<	fail("Unexpected exception");
286	<	}
265	>	/**
266	>	* put blocks interruptibly if full
267	>	*/
268	>	public void testBlockingPut() throws InterruptedException {
269	>	final LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
270	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
271	>	Thread t = newStartedThread(new CheckedRunnable() {
272	>	public void realRun() throws InterruptedException {
273	>	for (int i = 0; i < SIZE; ++i)
274	>	q.put(i);
275	>	assertEquals(SIZE, q.size());
276	>	assertEquals(0, q.remainingCapacity());
277	>
278	>	Thread.currentThread().interrupt();
279	>	try {
280	>	q.put(99);
281	>	shouldThrow();
282	>	} catch (InterruptedException success) {}
283	>	assertFalse(Thread.interrupted());
284	>
285	>	pleaseInterrupt.countDown();
286	>	try {
287	>	q.put(99);
288	>	shouldThrow();
289	>	} catch (InterruptedException success) {}
290	>	assertFalse(Thread.interrupted());
291	>	}});
292	>
293	>	await(pleaseInterrupt);
294	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
295	>	t.interrupt();
296	>	awaitTermination(t);
297	>	assertEquals(SIZE, q.size());
298	>	assertEquals(0, q.remainingCapacity());
299		}
300
301	+	/**
302	+	* put blocks interruptibly waiting for take when full
303	+	*/
304	+	public void testPutWithTake() throws InterruptedException {
305	+	final int capacity = 2;
306	+	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
307	+	final CountDownLatch pleaseTake = new CountDownLatch(1);
308	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
309	+	Thread t = newStartedThread(new CheckedRunnable() {
310	+	public void realRun() throws InterruptedException {
311	+	for (int i = 0; i < capacity; i++)
312	+	q.put(i);
313	+	pleaseTake.countDown();
314	+	q.put(86);
315	+
316	+	Thread.currentThread().interrupt();
317	+	try {
318	+	q.put(99);
319	+	shouldThrow();
320	+	} catch (InterruptedException success) {}
321	+	assertFalse(Thread.interrupted());
322
323	<	public void testPoll(){
323	>	pleaseInterrupt.countDown();
324	>	try {
325	>	q.put(99);
326	>	shouldThrow();
327	>	} catch (InterruptedException success) {}
328	>	assertFalse(Thread.interrupted());
329	>	}});
330	>
331	>	await(pleaseTake);
332	>	assertEquals(0, q.remainingCapacity());
333	>	assertEquals(0, q.take());
334	>
335	>	await(pleaseInterrupt);
336	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
337	>	t.interrupt();
338	>	awaitTermination(t);
339	>	assertEquals(0, q.remainingCapacity());
340	>	}
341	>
342	>	/**
343	>	* timed offer times out if full and elements not taken
344	>	*/
345	>	public void testTimedOffer() {
346	>	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
347	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
348	>	Thread t = newStartedThread(new CheckedRunnable() {
349	>	public void realRun() throws InterruptedException {
350	>	q.put(new Object());
351	>	q.put(new Object());
352	>	long startTime = System.nanoTime();
353	>
354	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
355	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
356	>
357	>	Thread.currentThread().interrupt();
358	>	try {
359	>	q.offer(new Object(), randomTimeout(), randomTimeUnit());
360	>	shouldThrow();
361	>	} catch (InterruptedException success) {}
362	>	assertFalse(Thread.interrupted());
363	>
364	>	pleaseInterrupt.countDown();
365	>	try {
366	>	q.offer(new Object(), LONGER_DELAY_MS, MILLISECONDS);
367	>	shouldThrow();
368	>	} catch (InterruptedException success) {}
369	>	assertFalse(Thread.interrupted());
370	>	}});
371	>
372	>	await(pleaseInterrupt);
373	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
374	>	t.interrupt();
375	>	awaitTermination(t);
376	>	}
377	>
378	>	/**
379	>	* take retrieves elements in FIFO order
380	>	*/
381	>	public void testTake() throws InterruptedException {
382		LinkedBlockingQueue q = populatedQueue(SIZE);
383		for (int i = 0; i < SIZE; ++i) {
384	<	assertEquals(i, ((Integer)q.poll()).intValue());
384	>	assertEquals(i, q.take());
385		}
369	–	assertNull(q.poll());
386		}
387
388	<	public void testTimedPoll0() {
389	<	try {
390	<	LinkedBlockingQueue q = populatedQueue(SIZE);
391	<	for (int i = 0; i < SIZE; ++i) {
392	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
393	<	}
394	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
395	<	} catch (InterruptedException e){
396	<	fail("Unexpected exception");
397	<	}
388	>	/**
389	>	* Take removes existing elements until empty, then blocks interruptibly
390	>	*/
391	>	public void testBlockingTake() throws InterruptedException {
392	>	final BlockingQueue q = populatedQueue(SIZE);
393	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
394	>	Thread t = newStartedThread(new CheckedRunnable() {
395	>	public void realRun() throws InterruptedException {
396	>	for (int i = 0; i < SIZE; i++) assertEquals(i, q.take());
397	>
398	>	Thread.currentThread().interrupt();
399	>	try {
400	>	q.take();
401	>	shouldThrow();
402	>	} catch (InterruptedException success) {}
403	>	assertFalse(Thread.interrupted());
404	>
405	>	pleaseInterrupt.countDown();
406	>	try {
407	>	q.take();
408	>	shouldThrow();
409	>	} catch (InterruptedException success) {}
410	>	assertFalse(Thread.interrupted());
411	>	}});
412	>
413	>	await(pleaseInterrupt);
414	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
415	>	t.interrupt();
416	>	awaitTermination(t);
417		}
418
419	<	public void testTimedPoll() {
420	<	try {
421	<	LinkedBlockingQueue q = populatedQueue(SIZE);
422	<	for (int i = 0; i < SIZE; ++i) {
423	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
424	<	}
425	<	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");
419	>	/**
420	>	* poll succeeds unless empty
421	>	*/
422	>	public void testPoll() {
423	>	LinkedBlockingQueue q = populatedQueue(SIZE);
424	>	for (int i = 0; i < SIZE; ++i) {
425	>	assertEquals(i, q.poll());
426		}
427	+	assertNull(q.poll());
428		}
429
430	<	public void testTimedPollWithOffer(){
431	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
432	<	Thread t = new Thread(new Runnable() {
433	<	public void run(){
434	<	try {
435	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
436	<	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");
430	>	/**
431	>	* timed poll with zero timeout succeeds when non-empty, else times out
432	>	*/
433	>	public void testTimedPoll0() throws InterruptedException {
434	>	LinkedBlockingQueue q = populatedQueue(SIZE);
435	>	for (int i = 0; i < SIZE; ++i) {
436	>	assertEquals(i, q.poll(0, MILLISECONDS));
437		}
438	<	}
438	>	assertNull(q.poll(0, MILLISECONDS));
439	>	}
440
441	+	/**
442	+	* timed poll with nonzero timeout succeeds when non-empty, else times out
443	+	*/
444	+	public void testTimedPoll() throws InterruptedException {
445	+	LinkedBlockingQueue<Integer> q = populatedQueue(SIZE);
446	+	for (int i = 0; i < SIZE; ++i) {
447	+	long startTime = System.nanoTime();
448	+	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
449	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
450	+	}
451	+	long startTime = System.nanoTime();
452	+	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
453	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
454	+	checkEmpty(q);
455	+	}
456
457	<	public void testPeek(){
457	>	/**
458	>	* Interrupted timed poll throws InterruptedException instead of
459	>	* returning timeout status
460	>	*/
461	>	public void testInterruptedTimedPoll() throws InterruptedException {
462	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
463	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
464	>	Thread t = newStartedThread(new CheckedRunnable() {
465	>	public void realRun() throws InterruptedException {
466	>	for (int i = 0; i < SIZE; i++)
467	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
468	>
469	>	Thread.currentThread().interrupt();
470	>	try {
471	>	q.poll(randomTimeout(), randomTimeUnit());
472	>	shouldThrow();
473	>	} catch (InterruptedException success) {}
474	>	assertFalse(Thread.interrupted());
475	>
476	>	pleaseInterrupt.countDown();
477	>	try {
478	>	q.poll(LONGER_DELAY_MS, MILLISECONDS);
479	>	shouldThrow();
480	>	} catch (InterruptedException success) {}
481	>	assertFalse(Thread.interrupted());
482	>	}});
483	>
484	>	await(pleaseInterrupt);
485	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
486	>	t.interrupt();
487	>	awaitTermination(t);
488	>	checkEmpty(q);
489	>	}
490	>
491	>	/**
492	>	* peek returns next element, or null if empty
493	>	*/
494	>	public void testPeek() {
495		LinkedBlockingQueue q = populatedQueue(SIZE);
496		for (int i = 0; i < SIZE; ++i) {
497	<	assertEquals(i, ((Integer)q.peek()).intValue());
498	<	q.poll();
497	>	assertEquals(i, q.peek());
498	>	assertEquals(i, q.poll());
499		assertTrue(q.peek() == null ||
500	<	i != ((Integer)q.peek()).intValue());
500	>	!q.peek().equals(i));
501		}
502	<	assertNull(q.peek());
502	>	assertNull(q.peek());
503		}
504
505	<	public void testElement(){
505	>	/**
506	>	* element returns next element, or throws NSEE if empty
507	>	*/
508	>	public void testElement() {
509		LinkedBlockingQueue q = populatedQueue(SIZE);
510		for (int i = 0; i < SIZE; ++i) {
511	<	assertEquals(i, ((Integer)q.element()).intValue());
512	<	q.poll();
511	>	assertEquals(i, q.element());
512	>	assertEquals(i, q.poll());
513		}
514		try {
515		q.element();
516	<	fail("no such element");
517	<	}
464	<	catch (NoSuchElementException success) {}
516	>	shouldThrow();
517	>	} catch (NoSuchElementException success) {}
518		}
519
520	<	public void testRemove(){
520	>	/**
521	>	* remove removes next element, or throws NSEE if empty
522	>	*/
523	>	public void testRemove() {
524		LinkedBlockingQueue q = populatedQueue(SIZE);
525		for (int i = 0; i < SIZE; ++i) {
526	<	assertEquals(i, ((Integer)q.remove()).intValue());
526	>	assertEquals(i, q.remove());
527		}
528		try {
529		q.remove();
530	<	fail("remove should throw");
531	<	} catch (NoSuchElementException success){
476	<	}
530	>	shouldThrow();
531	>	} catch (NoSuchElementException success) {}
532		}
533
534	<	public void testRemoveElement(){
535	<	LinkedBlockingQueue q = populatedQueue(SIZE);
536	<	for (int i = 1; i < SIZE; i+=2) {
537	<	assertTrue(q.remove(new Integer(i)));
538	<	}
539	<	for (int i = 0; i < SIZE; i+=2) {
540	<	assertTrue(q.remove(new Integer(i)));
541	<	assertFalse(q.remove(new Integer(i+1)));
542	<	}
543	<	assertTrue(q.isEmpty());
534	>	/**
535	>	* An add following remove(x) succeeds
536	>	*/
537	>	public void testRemoveElementAndAdd() throws InterruptedException {
538	>	LinkedBlockingQueue q = new LinkedBlockingQueue();
539	>	assertTrue(q.add(new Integer(1)));
540	>	assertTrue(q.add(new Integer(2)));
541	>	assertTrue(q.remove(new Integer(1)));
542	>	assertTrue(q.remove(new Integer(2)));
543	>	assertTrue(q.add(new Integer(3)));
544	>	assertNotNull(q.take());
545		}
546	<
547	<	public void testContains(){
546	>
547	>	/**
548	>	* contains(x) reports true when elements added but not yet removed
549	>	*/
550	>	public void testContains() {
551		LinkedBlockingQueue q = populatedQueue(SIZE);
552		for (int i = 0; i < SIZE; ++i) {
553		assertTrue(q.contains(new Integer(i)));
#	Line 497 | Line 556 | public class LinkedBlockingQueueTest ext
556		}
557		}
558
559	<	public void testClear(){
559	>	/**
560	>	* clear removes all elements
561	>	*/
562	>	public void testClear() {
563		LinkedBlockingQueue q = populatedQueue(SIZE);
564		q.clear();
565		assertTrue(q.isEmpty());
#	Line 505 | Line 567 | public class LinkedBlockingQueueTest ext
567		assertEquals(SIZE, q.remainingCapacity());
568		q.add(one);
569		assertFalse(q.isEmpty());
570	+	assertTrue(q.contains(one));
571		q.clear();
572		assertTrue(q.isEmpty());
573		}
574
575	<	public void testContainsAll(){
575	>	/**
576	>	* containsAll(c) is true when c contains a subset of elements
577	>	*/
578	>	public void testContainsAll() {
579		LinkedBlockingQueue q = populatedQueue(SIZE);
580		LinkedBlockingQueue p = new LinkedBlockingQueue(SIZE);
581		for (int i = 0; i < SIZE; ++i) {
#	Line 520 | Line 586 | public class LinkedBlockingQueueTest ext
586		assertTrue(p.containsAll(q));
587		}
588
589	<	public void testRetainAll(){
589	>	/**
590	>	* retainAll(c) retains only those elements of c and reports true if changed
591	>	*/
592	>	public void testRetainAll() {
593		LinkedBlockingQueue q = populatedQueue(SIZE);
594		LinkedBlockingQueue p = populatedQueue(SIZE);
595		for (int i = 0; i < SIZE; ++i) {
#	Line 531 | Line 600 | public class LinkedBlockingQueueTest ext
600		assertTrue(changed);
601
602		assertTrue(q.containsAll(p));
603	<	assertEquals(SIZE-i, q.size());
603	>	assertEquals(SIZE - i, q.size());
604		p.remove();
605		}
606		}
607
608	<	public void testRemoveAll(){
608	>	/**
609	>	* removeAll(c) removes only those elements of c and reports true if changed
610	>	*/
611	>	public void testRemoveAll() {
612		for (int i = 1; i < SIZE; ++i) {
613		LinkedBlockingQueue q = populatedQueue(SIZE);
614		LinkedBlockingQueue p = populatedQueue(i);
615		assertTrue(q.removeAll(p));
616	<	assertEquals(SIZE-i, q.size());
616	>	assertEquals(SIZE - i, q.size());
617		for (int j = 0; j < i; ++j) {
618	<	Integer I = (Integer)(p.remove());
619	<	assertFalse(q.contains(I));
618	>	Integer x = (Integer)(p.remove());
619	>	assertFalse(q.contains(x));
620		}
621		}
622		}
623
624	+	/**
625	+	* toArray contains all elements in FIFO order
626	+	*/
627	+	public void testToArray() {
628	+	LinkedBlockingQueue q = populatedQueue(SIZE);
629	+	Object[] a = q.toArray();
630	+	assertSame(Object[].class, a.getClass());
631	+	for (Object o : a)
632	+	assertSame(o, q.poll());
633	+	assertTrue(q.isEmpty());
634	+	}
635
636	<	public void testToArray(){
636	>	/**
637	>	* toArray(a) contains all elements in FIFO order
638	>	*/
639	>	public void testToArray2() throws InterruptedException {
640	>	LinkedBlockingQueue<Integer> q = populatedQueue(SIZE);
641	>	Integer[] ints = new Integer[SIZE];
642	>	Integer[] array = q.toArray(ints);
643	>	assertSame(ints, array);
644	>	for (Integer o : ints)
645	>	assertSame(o, q.poll());
646	>	assertTrue(q.isEmpty());
647	>	}
648	>
649	>	/**
650	>	* toArray(incompatible array type) throws ArrayStoreException
651	>	*/
652	>	public void testToArray1_BadArg() {
653		LinkedBlockingQueue q = populatedQueue(SIZE);
654	<	Object[] o = q.toArray();
655	<	try {
656	<	for(int i = 0; i < o.length; i++)
657	<	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	<	}
654	>	try {
655	>	q.toArray(new String[10]);
656	>	shouldThrow();
657	>	} catch (ArrayStoreException success) {}
658		}
659
660	<	public void testIteratorOrdering() {
660	>	/**
661	>	* iterator iterates through all elements
662	>	*/
663	>	public void testIterator() throws InterruptedException {
664	>	LinkedBlockingQueue q = populatedQueue(SIZE);
665	>	Iterator it = q.iterator();
666	>	int i;
667	>	for (i = 0; it.hasNext(); i++)
668	>	assertTrue(q.contains(it.next()));
669	>	assertEquals(i, SIZE);
670	>	assertIteratorExhausted(it);
671	>
672	>	it = q.iterator();
673	>	for (i = 0; it.hasNext(); i++)
674	>	assertEquals(it.next(), q.take());
675	>	assertEquals(i, SIZE);
676	>	assertIteratorExhausted(it);
677	>	}
678
679	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
679	>	/**
680	>	* iterator of empty collection has no elements
681	>	*/
682	>	public void testEmptyIterator() {
683	>	assertIteratorExhausted(new LinkedBlockingQueue().iterator());
684	>	}
685
686	<	q.add(one);
686	>	/**
687	>	* iterator.remove removes current element
688	>	*/
689	>	public void testIteratorRemove() {
690	>	final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
691		q.add(two);
692	+	q.add(one);
693		q.add(three);
694
695	<	assertEquals("queue should be full", 0, q.remainingCapacity());
695	>	Iterator it = q.iterator();
696	>	it.next();
697	>	it.remove();
698	>
699	>	it = q.iterator();
700	>	assertSame(it.next(), one);
701	>	assertSame(it.next(), three);
702	>	assertFalse(it.hasNext());
703	>	}
704
705	+	/**
706	+	* iterator ordering is FIFO
707	+	*/
708	+	public void testIteratorOrdering() {
709	+	final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
710	+	q.add(one);
711	+	q.add(two);
712	+	q.add(three);
713	+	assertEquals(0, q.remainingCapacity());
714		int k = 0;
715		for (Iterator it = q.iterator(); it.hasNext();) {
716	<	int i = ((Integer)(it.next())).intValue();
601	<	assertEquals("items should come out in order", ++k, i);
716	>	assertEquals(++k, it.next());
717		}
718	<
604	<	assertEquals("should go through 3 elements", 3, k);
718	>	assertEquals(3, k);
719		}
720
721	<	public void testWeaklyConsistentIteration () {
722	<
721	>	/**
722	>	* Modifications do not cause iterators to fail
723	>	*/
724	>	public void testWeaklyConsistentIteration() {
725		final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
610	–
726		q.add(one);
727		q.add(two);
728		q.add(three);
729	<
730	<	try {
731	<	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");
729	>	for (Iterator it = q.iterator(); it.hasNext();) {
730	>	q.remove();
731	>	it.next();
732		}
733	<
625	<	assertEquals("queue should be empty again", 0, q.size());
733	>	assertEquals(0, q.size());
734		}
735
736	<
737	<	public void testToString(){
736	>	/**
737	>	* toString contains toStrings of elements
738	>	*/
739	>	public void testToString() {
740		LinkedBlockingQueue q = populatedQueue(SIZE);
741		String s = q.toString();
742		for (int i = 0; i < SIZE; ++i) {
743	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
743	>	assertTrue(s.contains(String.valueOf(i)));
744		}
745	<	}
636	<
745	>	}
746
747	+	/**
748	+	* offer transfers elements across Executor tasks
749	+	*/
750		public void testOfferInExecutor() {
639	–
751		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
641	–
752		q.add(one);
753		q.add(two);
754	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
755	+	final ExecutorService executor = Executors.newFixedThreadPool(2);
756	+	try (PoolCleaner cleaner = cleaner(executor)) {
757	+	executor.execute(new CheckedRunnable() {
758	+	public void realRun() throws InterruptedException {
759	+	assertFalse(q.offer(three));
760	+	threadsStarted.await();
761	+	assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS));
762	+	assertEquals(0, q.remainingCapacity());
763	+	}});
764
765	<	ExecutorService executor = Executors.newFixedThreadPool(2);
766	<
767	<	executor.execute(new Runnable() {
768	<	public void run() {
769	<	threadAssertFalse(q.offer(three));
770	<	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	<
765	>	executor.execute(new CheckedRunnable() {
766	>	public void realRun() throws InterruptedException {
767	>	threadsStarted.await();
768	>	assertSame(one, q.take());
769	>	}});
770	>	}
771		}
772
773	+	/**
774	+	* timed poll retrieves elements across Executor threads
775	+	*/
776		public void testPollInExecutor() {
677	–
777		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
778	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
779	+	final ExecutorService executor = Executors.newFixedThreadPool(2);
780	+	try (PoolCleaner cleaner = cleaner(executor)) {
781	+	executor.execute(new CheckedRunnable() {
782	+	public void realRun() throws InterruptedException {
783	+	assertNull(q.poll());
784	+	threadsStarted.await();
785	+	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
786	+	checkEmpty(q);
787	+	}});
788
789	<	ExecutorService executor = Executors.newFixedThreadPool(2);
790	<
791	<	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);
789	>	executor.execute(new CheckedRunnable() {
790	>	public void realRun() throws InterruptedException {
791	>	threadsStarted.await();
792		q.put(one);
793	<	}
794	<	catch (InterruptedException e) {
702	<	threadFail("should not be interrupted");
703	<	}
704	<	}
705	<	});
706	<
707	<	joinPool(executor);
793	>	}});
794	>	}
795		}
796
797	<	public void testSerialization() {
797	>	/**
798	>	* A deserialized/reserialized queue has same elements in same order
799	>	*/
800	>	public void testSerialization() throws Exception {
801	>	Queue x = populatedQueue(SIZE);
802	>	Queue y = serialClone(x);
803	>
804	>	assertNotSame(x, y);
805	>	assertEquals(x.size(), y.size());
806	>	assertEquals(x.toString(), y.toString());
807	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
808	>	while (!x.isEmpty()) {
809	>	assertFalse(y.isEmpty());
810	>	assertEquals(x.remove(), y.remove());
811	>	}
812	>	assertTrue(y.isEmpty());
813	>	}
814	>
815	>	/**
816	>	* drainTo(c) empties queue into another collection c
817	>	*/
818	>	public void testDrainTo() {
819		LinkedBlockingQueue q = populatedQueue(SIZE);
820	+	ArrayList l = new ArrayList();
821	+	q.drainTo(l);
822	+	assertEquals(0, q.size());
823	+	assertEquals(SIZE, l.size());
824	+	for (int i = 0; i < SIZE; ++i)
825	+	assertEquals(l.get(i), new Integer(i));
826	+	q.add(zero);
827	+	q.add(one);
828	+	assertFalse(q.isEmpty());
829	+	assertTrue(q.contains(zero));
830	+	assertTrue(q.contains(one));
831	+	l.clear();
832	+	q.drainTo(l);
833	+	assertEquals(0, q.size());
834	+	assertEquals(2, l.size());
835	+	for (int i = 0; i < 2; ++i)
836	+	assertEquals(l.get(i), new Integer(i));
837	+	}
838
839	<	try {
840	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
841	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
842	<	out.writeObject(q);
843	<	out.close();
839	>	/**
840	>	* drainTo empties full queue, unblocking a waiting put.
841	>	*/
842	>	public void testDrainToWithActivePut() throws InterruptedException {
843	>	final LinkedBlockingQueue q = populatedQueue(SIZE);
844	>	Thread t = new Thread(new CheckedRunnable() {
845	>	public void realRun() throws InterruptedException {
846	>	q.put(new Integer(SIZE + 1));
847	>	}});
848
849	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
850	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
851	<	LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject();
852	<	assertEquals(q.size(), r.size());
853	<	while (!q.isEmpty())
854	<	assertEquals(q.remove(), r.remove());
855	<	} catch(Exception e){
856	<	e.printStackTrace();
857	<	fail("unexpected exception");
849	>	t.start();
850	>	ArrayList l = new ArrayList();
851	>	q.drainTo(l);
852	>	assertTrue(l.size() >= SIZE);
853	>	for (int i = 0; i < SIZE; ++i)
854	>	assertEquals(l.get(i), new Integer(i));
855	>	t.join();
856	>	assertTrue(q.size() + l.size() >= SIZE);
857	>	}
858	>
859	>	/**
860	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
861	>	*/
862	>	public void testDrainToN() {
863	>	LinkedBlockingQueue q = new LinkedBlockingQueue();
864	>	for (int i = 0; i < SIZE + 2; ++i) {
865	>	for (int j = 0; j < SIZE; j++)
866	>	assertTrue(q.offer(new Integer(j)));
867	>	ArrayList l = new ArrayList();
868	>	q.drainTo(l, i);
869	>	int k = (i < SIZE) ? i : SIZE;
870	>	assertEquals(k, l.size());
871	>	assertEquals(SIZE - k, q.size());
872	>	for (int j = 0; j < k; ++j)
873	>	assertEquals(l.get(j), new Integer(j));
874	>	do {} while (q.poll() != null);
875	>	}
876	>	}
877	>
878	>	/**
879	>	* remove(null), contains(null) always return false
880	>	*/
881	>	public void testNeverContainsNull() {
882	>	Collection<?>[] qs = {
883	>	new LinkedBlockingQueue<Object>(),
884	>	populatedQueue(2),
885	>	};
886	>
887	>	for (Collection<?> q : qs) {
888	>	assertFalse(q.contains(null));
889	>	assertFalse(q.remove(null));
890		}
891		}
892

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