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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 1.26 by jsr166, Wed Aug 25 00:07:03 2010 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/licenses/publicdomain
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 static java.util.concurrent.TimeUnit.MILLISECONDS;
13		import java.io.*;
14
15	<	public class LinkedBlockingQueueTest extends TestCase {
14	<
15	<	private static int N = 10;
16	<	private static long SHORT_DELAY_MS = 100;
17	<	private static long MEDIUM_DELAY_MS = 1000;
18	<	private static long LONG_DELAY_MS = 10000;
15	>	public class LinkedBlockingQueueTest extends JSR166TestCase {
16
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run(suite());
19		}
20
21		public static Test suite() {
22	<	return new TestSuite(LinkedBlockingQueueTest.class);
22	>	return new TestSuite(LinkedBlockingQueueTest.class);
23		}
24
25	+
26		/**
27		* Create a queue of given size containing consecutive
28		* Integers 0 ... n.
29		*/
30	<	private LinkedBlockingQueue fullQueue(int n) {
30	>	private LinkedBlockingQueue populatedQueue(int n) {
31		LinkedBlockingQueue q = new LinkedBlockingQueue(n);
32		assertTrue(q.isEmpty());
33	<	for(int i = 0; i < n; i++)
34	<	assertTrue(q.offer(new Integer(i)));
33	>	for (int i = 0; i < n; i++)
34	>	assertTrue(q.offer(new Integer(i)));
35		assertFalse(q.isEmpty());
36		assertEquals(0, q.remainingCapacity());
37	<	assertEquals(n, q.size());
37	>	assertEquals(n, q.size());
38		return q;
39		}
40	<
41	<	public void testConstructor1(){
42	<	assertEquals(N, new LinkedBlockingQueue(N).remainingCapacity());
40	>
41	>	/**
42	>	* A new queue has the indicated capacity, or Integer.MAX_VALUE if
43	>	* none given
44	>	*/
45	>	public void testConstructor1() {
46	>	assertEquals(SIZE, new LinkedBlockingQueue(SIZE).remainingCapacity());
47	>	assertEquals(Integer.MAX_VALUE, new LinkedBlockingQueue().remainingCapacity());
48		}
49
50	<	public void testConstructor2(){
50	>	/**
51	>	* Constructor throws IAE if capacity argument nonpositive
52	>	*/
53	>	public void testConstructor2() {
54		try {
55		LinkedBlockingQueue q = new LinkedBlockingQueue(0);
56	<	fail("Cannot make zero-sized");
57	<	}
52	<	catch (IllegalArgumentException success) {}
56	>	shouldThrow();
57	>	} catch (IllegalArgumentException success) {}
58		}
59
60	<	public void testConstructor3(){
61	<
60	>	/**
61	>	* Initializing from null Collection throws NPE
62	>	*/
63	>	public void testConstructor3() {
64		try {
65		LinkedBlockingQueue q = new LinkedBlockingQueue(null);
66	<	fail("Cannot make from null collection");
67	<	}
61	<	catch (NullPointerException success) {}
66	>	shouldThrow();
67	>	} catch (NullPointerException success) {}
68		}
69
70	<	public void testConstructor4(){
70	>	/**
71	>	* Initializing from Collection of null elements throws NPE
72	>	*/
73	>	public void testConstructor4() {
74		try {
75	<	Integer[] ints = new Integer[N];
75	>	Integer[] ints = new Integer[SIZE];
76		LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
77	<	fail("Cannot make with null elements");
78	<	}
70	<	catch (NullPointerException success) {}
77	>	shouldThrow();
78	>	} catch (NullPointerException success) {}
79		}
80
81	<	public void testConstructor5(){
81	>	/**
82	>	* Initializing from Collection with some null elements throws NPE
83	>	*/
84	>	public void testConstructor5() {
85		try {
86	<	Integer[] ints = new Integer[N];
87	<	for (int i = 0; i < N-1; ++i)
86	>	Integer[] ints = new Integer[SIZE];
87	>	for (int i = 0; i < SIZE-1; ++i)
88		ints[i] = new Integer(i);
89		LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
90	<	fail("Cannot make with null elements");
91	<	}
81	<	catch (NullPointerException success) {}
90	>	shouldThrow();
91	>	} catch (NullPointerException success) {}
92		}
93
94	<	public void testConstructor6(){
95	<	try {
96	<	Integer[] ints = new Integer[N];
97	<	for (int i = 0; i < N; ++i)
98	<	ints[i] = new Integer(i);
99	<	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
100	<	for (int i = 0; i < N; ++i)
101	<	assertEquals(ints[i], q.poll());
102	<	}
103	<	finally {}
94	>	/**
95	>	* Queue contains all elements of collection used to initialize
96	>	*/
97	>	public void testConstructor6() {
98	>	Integer[] ints = new Integer[SIZE];
99	>	for (int i = 0; i < SIZE; ++i)
100	>	ints[i] = new Integer(i);
101	>	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
102	>	for (int i = 0; i < SIZE; ++i)
103	>	assertEquals(ints[i], q.poll());
104		}
105
106	+	/**
107	+	* Queue transitions from empty to full when elements added
108	+	*/
109		public void testEmptyFull() {
110		LinkedBlockingQueue q = new LinkedBlockingQueue(2);
111		assertTrue(q.isEmpty());
112		assertEquals("should have room for 2", 2, q.remainingCapacity());
113	<	q.add(new Integer(1));
113	>	q.add(one);
114		assertFalse(q.isEmpty());
115	<	q.add(new Integer(2));
115	>	q.add(two);
116		assertFalse(q.isEmpty());
117	<	assertEquals("queue should be full", 0, q.remainingCapacity());
118	<	assertFalse("offer should be rejected", q.offer(new Integer(3)));
117	>	assertEquals(0, q.remainingCapacity());
118	>	assertFalse(q.offer(three));
119		}
120
121	<	public void testRemainingCapacity(){
122	<	LinkedBlockingQueue q = fullQueue(N);
123	<	for (int i = 0; i < N; ++i) {
121	>	/**
122	>	* remainingCapacity decreases on add, increases on remove
123	>	*/
124	>	public void testRemainingCapacity() {
125	>	LinkedBlockingQueue q = populatedQueue(SIZE);
126	>	for (int i = 0; i < SIZE; ++i) {
127		assertEquals(i, q.remainingCapacity());
128	<	assertEquals(N-i, q.size());
128	>	assertEquals(SIZE-i, q.size());
129		q.remove();
130		}
131	<	for (int i = 0; i < N; ++i) {
132	<	assertEquals(N-i, q.remainingCapacity());
131	>	for (int i = 0; i < SIZE; ++i) {
132	>	assertEquals(SIZE-i, q.remainingCapacity());
133		assertEquals(i, q.size());
134		q.add(new Integer(i));
135		}
136		}
137
138	<	public void testOfferNull(){
139	<	try {
138	>	/**
139	>	* offer(null) throws NPE
140	>	*/
141	>	public void testOfferNull() {
142	>	try {
143		LinkedBlockingQueue q = new LinkedBlockingQueue(1);
144		q.offer(null);
145	<	fail("should throw NPE");
146	<	} catch (NullPointerException success) { }
145	>	shouldThrow();
146	>	} catch (NullPointerException success) {}
147	>	}
148	>
149	>	/**
150	>	* add(null) throws NPE
151	>	*/
152	>	public void testAddNull() {
153	>	try {
154	>	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
155	>	q.add(null);
156	>	shouldThrow();
157	>	} catch (NullPointerException success) {}
158		}
159
160	<	public void testOffer(){
160	>	/**
161	>	* Offer succeeds if not full; fails if full
162	>	*/
163	>	public void testOffer() {
164		LinkedBlockingQueue q = new LinkedBlockingQueue(1);
165	<	assertTrue(q.offer(new Integer(0)));
166	<	assertFalse(q.offer(new Integer(1)));
165	>	assertTrue(q.offer(zero));
166	>	assertFalse(q.offer(one));
167		}
168
169	<	public void testAdd(){
170	<	try {
171	<	LinkedBlockingQueue q = new LinkedBlockingQueue(N);
172	<	for (int i = 0; i < N; ++i) {
169	>	/**
170	>	* add succeeds if not full; throws ISE if full
171	>	*/
172	>	public void testAdd() {
173	>	try {
174	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
175	>	for (int i = 0; i < SIZE; ++i) {
176		assertTrue(q.add(new Integer(i)));
177		}
178		assertEquals(0, q.remainingCapacity());
179	<	q.add(new Integer(N));
180	<	} catch (IllegalStateException success){
181	<	}
179	>	q.add(new Integer(SIZE));
180	>	shouldThrow();
181	>	} catch (IllegalStateException success) {}
182		}
183
184	<	public void testAddAll1(){
184	>	/**
185	>	* addAll(null) throws NPE
186	>	*/
187	>	public void testAddAll1() {
188		try {
189		LinkedBlockingQueue q = new LinkedBlockingQueue(1);
190		q.addAll(null);
191	<	fail("Cannot add null collection");
192	<	}
193	<	catch (NullPointerException success) {}
191	>	shouldThrow();
192	>	} catch (NullPointerException success) {}
193	>	}
194	>
195	>	/**
196	>	* addAll(this) throws IAE
197	>	*/
198	>	public void testAddAllSelf() {
199	>	try {
200	>	LinkedBlockingQueue q = populatedQueue(SIZE);
201	>	q.addAll(q);
202	>	shouldThrow();
203	>	} catch (IllegalArgumentException success) {}
204		}
205	<	public void testAddAll2(){
205	>
206	>	/**
207	>	* addAll of a collection with null elements throws NPE
208	>	*/
209	>	public void testAddAll2() {
210		try {
211	<	LinkedBlockingQueue q = new LinkedBlockingQueue(N);
212	<	Integer[] ints = new Integer[N];
211	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
212	>	Integer[] ints = new Integer[SIZE];
213		q.addAll(Arrays.asList(ints));
214	<	fail("Cannot add null elements");
215	<	}
163	<	catch (NullPointerException success) {}
214	>	shouldThrow();
215	>	} catch (NullPointerException success) {}
216		}
217	<	public void testAddAll3(){
217	>	/**
218	>	* addAll of a collection with any null elements throws NPE after
219	>	* possibly adding some elements
220	>	*/
221	>	public void testAddAll3() {
222		try {
223	<	LinkedBlockingQueue q = new LinkedBlockingQueue(N);
224	<	Integer[] ints = new Integer[N];
225	<	for (int i = 0; i < N-1; ++i)
223	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
224	>	Integer[] ints = new Integer[SIZE];
225	>	for (int i = 0; i < SIZE-1; ++i)
226		ints[i] = new Integer(i);
227		q.addAll(Arrays.asList(ints));
228	<	fail("Cannot add null elements");
229	<	}
174	<	catch (NullPointerException success) {}
228	>	shouldThrow();
229	>	} catch (NullPointerException success) {}
230		}
231	<	public void testAddAll4(){
231	>	/**
232	>	* addAll throws ISE if not enough room
233	>	*/
234	>	public void testAddAll4() {
235		try {
236		LinkedBlockingQueue q = new LinkedBlockingQueue(1);
237	<	Integer[] ints = new Integer[N];
238	<	for (int i = 0; i < N; ++i)
237	>	Integer[] ints = new Integer[SIZE];
238	>	for (int i = 0; i < SIZE; ++i)
239		ints[i] = new Integer(i);
240		q.addAll(Arrays.asList(ints));
241	<	fail("Cannot add with insufficient capacity");
242	<	}
185	<	catch (IllegalStateException success) {}
241	>	shouldThrow();
242	>	} catch (IllegalStateException success) {}
243		}
244	<	public void testAddAll5(){
245	<	try {
246	<	Integer[] empty = new Integer[0];
247	<	Integer[] ints = new Integer[N];
248	<	for (int i = 0; i < N; ++i)
249	<	ints[i] = new Integer(i);
250	<	LinkedBlockingQueue q = new LinkedBlockingQueue(N);
251	<	assertFalse(q.addAll(Arrays.asList(empty)));
252	<	assertTrue(q.addAll(Arrays.asList(ints)));
253	<	for (int i = 0; i < N; ++i)
254	<	assertEquals(ints[i], q.poll());
255	<	}
256	<	finally {}
244	>	/**
245	>	* Queue contains all elements, in traversal order, of successful addAll
246	>	*/
247	>	public void testAddAll5() {
248	>	Integer[] empty = new Integer[0];
249	>	Integer[] ints = new Integer[SIZE];
250	>	for (int i = 0; i < SIZE; ++i)
251	>	ints[i] = new Integer(i);
252	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
253	>	assertFalse(q.addAll(Arrays.asList(empty)));
254	>	assertTrue(q.addAll(Arrays.asList(ints)));
255	>	for (int i = 0; i < SIZE; ++i)
256	>	assertEquals(ints[i], q.poll());
257		}
258
259	<	public void testPutNull() {
260	<	try {
261	<	LinkedBlockingQueue q = new LinkedBlockingQueue(N);
259	>	/**
260	>	* put(null) throws NPE
261	>	*/
262	>	public void testPutNull() throws InterruptedException {
263	>	try {
264	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
265		q.put(null);
266	<	fail("put should throw NPE");
267	<	}
208	<	catch (NullPointerException success){
209	<	}
210	<	catch (InterruptedException ie) {
211	<	fail("Unexpected exception");
212	<	}
266	>	shouldThrow();
267	>	} catch (NullPointerException success) {}
268		}
269
270	<	public void testPut() {
271	<	try {
272	<	LinkedBlockingQueue q = new LinkedBlockingQueue(N);
273	<	for (int i = 0; i < N; ++i) {
274	<	Integer I = new Integer(i);
275	<	q.put(I);
276	<	assertTrue(q.contains(I));
277	<	}
278	<	assertEquals(0, q.remainingCapacity());
224	<	}
225	<	catch (InterruptedException ie) {
226	<	fail("Unexpected exception");
270	>	/**
271	>	* all elements successfully put are contained
272	>	*/
273	>	public void testPut() throws InterruptedException {
274	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
275	>	for (int i = 0; i < SIZE; ++i) {
276	>	Integer I = new Integer(i);
277	>	q.put(I);
278	>	assertTrue(q.contains(I));
279		}
280	+	assertEquals(0, q.remainingCapacity());
281		}
282
283	<	public void testBlockingPut(){
284	<	Thread t = new Thread(new Runnable() {
285	<	public void run() {
286	<	int added = 0;
287	<	try {
288	<	LinkedBlockingQueue q = new LinkedBlockingQueue(N);
289	<	for (int i = 0; i < N; ++i) {
290	<	q.put(new Integer(i));
291	<	++added;
292	<	}
293	<	q.put(new Integer(N));
294	<	fail("put should block");
295	<	} catch (InterruptedException ie){
296	<	assertEquals(added, N);
297	<	}
298	<	}});
283	>	/**
284	>	* put blocks interruptibly if full
285	>	*/
286	>	public void testBlockingPut() throws InterruptedException {
287	>	final LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
288	>	Thread t = new Thread(new CheckedRunnable() {
289	>	public void realRun() throws InterruptedException {
290	>	for (int i = 0; i < SIZE; ++i)
291	>	q.put(i);
292	>	assertEquals(SIZE, q.size());
293	>	assertEquals(0, q.remainingCapacity());
294	>	try {
295	>	q.put(99);
296	>	shouldThrow();
297	>	} catch (InterruptedException success) {}
298	>	}});
299	>
300		t.start();
301	<	try {
302	<	Thread.sleep(SHORT_DELAY_MS);
303	<	t.interrupt();
304	<	t.join();
305	<	}
252	<	catch (InterruptedException ie) {
253	<	fail("Unexpected exception");
254	<	}
301	>	Thread.sleep(SHORT_DELAY_MS);
302	>	t.interrupt();
303	>	t.join();
304	>	assertEquals(SIZE, q.size());
305	>	assertEquals(0, q.remainingCapacity());
306		}
307
308	<	public void testPutWithTake() {
308	>	/**
309	>	* put blocks waiting for take when full
310	>	*/
311	>	public void testPutWithTake() throws InterruptedException {
312	>	final int capacity = 2;
313		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
314	<	Thread t = new Thread(new Runnable() {
315	<	public void run(){
316	<	int added = 0;
317	<	try {
318	<	q.put(new Object());
319	<	++added;
320	<	q.put(new Object());
321	<	++added;
322	<	q.put(new Object());
323	<	++added;
324	<	q.put(new Object());
325	<	++added;
326	<	fail("Should block");
327	<	} catch (InterruptedException e){
328	<	assertTrue(added >= 2);
329	<	}
330	<	}
331	<	});
277	<	try {
278	<	t.start();
279	<	Thread.sleep(SHORT_DELAY_MS);
280	<	q.take();
281	<	t.interrupt();
282	<	t.join();
283	<	} catch (Exception e){
284	<	fail("Unexpected exception");
285	<	}
314	>	Thread t = new Thread(new CheckedRunnable() {
315	>	public void realRun() throws InterruptedException {
316	>	for (int i = 0; i < capacity + 1; i++)
317	>	q.put(i);
318	>	try {
319	>	q.put(99);
320	>	shouldThrow();
321	>	} catch (InterruptedException success) {}
322	>	}});
323	>
324	>	t.start();
325	>	Thread.sleep(SHORT_DELAY_MS);
326	>	assertEquals(q.remainingCapacity(), 0);
327	>	assertEquals(0, q.take());
328	>	Thread.sleep(SHORT_DELAY_MS);
329	>	t.interrupt();
330	>	t.join();
331	>	assertEquals(q.remainingCapacity(), 0);
332		}
333
334	<	public void testTimedOffer() {
334	>	/**
335	>	* timed offer times out if full and elements not taken
336	>	*/
337	>	public void testTimedOffer() throws InterruptedException {
338		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
339	<	Thread t = new Thread(new Runnable() {
340	<	public void run(){
341	<	try {
342	<	q.put(new Object());
343	<	q.put(new Object());
344	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
345	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
346	<	fail("Should block");
347	<	} catch (InterruptedException success){}
348	<	}
349	<	});
350	<
351	<	try {
352	<	t.start();
353	<	Thread.sleep(SHORT_DELAY_MS);
305	<	t.interrupt();
306	<	t.join();
307	<	} catch (Exception e){
308	<	fail("Unexpected exception");
309	<	}
339	>	Thread t = new Thread(new CheckedRunnable() {
340	>	public void realRun() throws InterruptedException {
341	>	q.put(new Object());
342	>	q.put(new Object());
343	>	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
344	>	try {
345	>	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
346	>	shouldThrow();
347	>	} catch (InterruptedException success) {}
348	>	}});
349	>
350	>	t.start();
351	>	Thread.sleep(SMALL_DELAY_MS);
352	>	t.interrupt();
353	>	t.join();
354		}
355
356	<	public void testTake(){
357	<	try {
358	<	LinkedBlockingQueue q = fullQueue(N);
359	<	for (int i = 0; i < N; ++i) {
360	<	assertEquals(i, ((Integer)q.take()).intValue());
361	<	}
362	<	} catch (InterruptedException e){
363	<	fail("Unexpected exception");
320	<	}
356	>	/**
357	>	* take retrieves elements in FIFO order
358	>	*/
359	>	public void testTake() throws InterruptedException {
360	>	LinkedBlockingQueue q = populatedQueue(SIZE);
361	>	for (int i = 0; i < SIZE; ++i) {
362	>	assertEquals(i, q.take());
363	>	}
364		}
365
366	<	public void testTakeFromEmpty() {
366	>	/**
367	>	* take blocks interruptibly when empty
368	>	*/
369	>	public void testTakeFromEmpty() throws InterruptedException {
370		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
371	<	Thread t = new Thread(new Runnable() {
372	<	public void run(){
373	<	try {
374	<	q.take();
375	<	fail("Should block");
376	<	} catch (InterruptedException success){ }
377	<	}
378	<	});
379	<	try {
334	<	t.start();
335	<	Thread.sleep(SHORT_DELAY_MS);
336	<	t.interrupt();
337	<	t.join();
338	<	} catch (Exception e){
339	<	fail("Unexpected exception");
340	<	}
371	>	Thread t = new ThreadShouldThrow(InterruptedException.class) {
372	>	public void realRun() throws InterruptedException {
373	>	q.take();
374	>	}};
375	>
376	>	t.start();
377	>	Thread.sleep(SHORT_DELAY_MS);
378	>	t.interrupt();
379	>	t.join();
380		}
381
382	<	public void testBlockingTake(){
383	<	Thread t = new Thread(new Runnable() {
384	<	public void run() {
385	<	try {
386	<	LinkedBlockingQueue q = fullQueue(N);
387	<	for (int i = 0; i < N; ++i) {
388	<	assertEquals(i, ((Integer)q.take()).intValue());
389	<	}
390	<	q.take();
391	<	fail("take should block");
392	<	} catch (InterruptedException success){
393	<	}
394	<	}});
382	>	/**
383	>	* Take removes existing elements until empty, then blocks interruptibly
384	>	*/
385	>	public void testBlockingTake() throws InterruptedException {
386	>	final LinkedBlockingQueue q = populatedQueue(SIZE);
387	>	Thread t = new Thread(new CheckedRunnable() {
388	>	public void realRun() throws InterruptedException {
389	>	for (int i = 0; i < SIZE; ++i) {
390	>	assertEquals(i, q.take());
391	>	}
392	>	try {
393	>	q.take();
394	>	shouldThrow();
395	>	} catch (InterruptedException success) {}
396	>	}});
397	>
398		t.start();
399	<	try {
400	<	Thread.sleep(SHORT_DELAY_MS);
401	<	t.interrupt();
360	<	t.join();
361	<	}
362	<	catch (InterruptedException ie) {
363	<	fail("Unexpected exception");
364	<	}
399	>	Thread.sleep(SHORT_DELAY_MS);
400	>	t.interrupt();
401	>	t.join();
402		}
403
404	+	/**
405	+	* poll succeeds unless empty
406	+	*/
407	+	public void testPoll() {
408	+	LinkedBlockingQueue q = populatedQueue(SIZE);
409	+	for (int i = 0; i < SIZE; ++i) {
410	+	assertEquals(i, q.poll());
411	+	}
412	+	assertNull(q.poll());
413	+	}
414
415	<	public void testPoll(){
416	<	LinkedBlockingQueue q = fullQueue(N);
417	<	for (int i = 0; i < N; ++i) {
418	<	assertEquals(i, ((Integer)q.poll()).intValue());
415	>	/**
416	>	* timed pool with zero timeout succeeds when non-empty, else times out
417	>	*/
418	>	public void testTimedPoll0() throws InterruptedException {
419	>	LinkedBlockingQueue q = populatedQueue(SIZE);
420	>	for (int i = 0; i < SIZE; ++i) {
421	>	assertEquals(i, q.poll(0, MILLISECONDS));
422		}
423	<	assertNull(q.poll());
423	>	assertNull(q.poll(0, MILLISECONDS));
424		}
425
426	<	public void testTimedPoll0() {
427	<	try {
428	<	LinkedBlockingQueue q = fullQueue(N);
429	<	for (int i = 0; i < N; ++i) {
430	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
431	<	}
432	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
433	<	} catch (InterruptedException e){
434	<	fail("Unexpected exception");
385	<	}
426	>	/**
427	>	* timed pool with nonzero timeout succeeds when non-empty, else times out
428	>	*/
429	>	public void testTimedPoll() throws InterruptedException {
430	>	LinkedBlockingQueue q = populatedQueue(SIZE);
431	>	for (int i = 0; i < SIZE; ++i) {
432	>	assertEquals(i, q.poll(SHORT_DELAY_MS, MILLISECONDS));
433	>	}
434	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
435		}
436
437	<	public void testTimedPoll() {
438	<	try {
439	<	LinkedBlockingQueue q = fullQueue(N);
440	<	for (int i = 0; i < N; ++i) {
441	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
442	<	}
443	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
444	<	} catch (InterruptedException e){
445	<	fail("Unexpected exception");
446	<	}
447	<	}
448	<
449	<	public void testInterruptedTimedPoll(){
450	<	Thread t = new Thread(new Runnable() {
451	<	public void run() {
452	<	try {
453	<	LinkedBlockingQueue q = fullQueue(N);
405	<	for (int i = 0; i < N; ++i) {
406	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
407	<	}
408	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
409	<	} catch (InterruptedException success){
410	<	}
411	<	}});
437	>	/**
438	>	* Interrupted timed poll throws InterruptedException instead of
439	>	* returning timeout status
440	>	*/
441	>	public void testInterruptedTimedPoll() throws InterruptedException {
442	>	Thread t = new Thread(new CheckedRunnable() {
443	>	public void realRun() throws InterruptedException {
444	>	LinkedBlockingQueue q = populatedQueue(SIZE);
445	>	for (int i = 0; i < SIZE; ++i) {
446	>	assertEquals(i, q.poll(SHORT_DELAY_MS, MILLISECONDS));
447	>	}
448	>	try {
449	>	q.poll(SMALL_DELAY_MS, MILLISECONDS);
450	>	shouldThrow();
451	>	} catch (InterruptedException success) {}
452	>	}});
453	>
454		t.start();
455	<	try {
456	<	Thread.sleep(SHORT_DELAY_MS);
457	<	t.interrupt();
416	<	t.join();
417	<	}
418	<	catch (InterruptedException ie) {
419	<	fail("Unexpected exception");
420	<	}
455	>	Thread.sleep(SHORT_DELAY_MS);
456	>	t.interrupt();
457	>	t.join();
458		}
459
460	<	public void testTimedPollWithOffer(){
460	>	/**
461	>	*  timed poll before a delayed offer fails; after offer succeeds;
462	>	*  on interruption throws
463	>	*/
464	>	public void testTimedPollWithOffer() throws InterruptedException {
465		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
466	<	Thread t = new Thread(new Runnable() {
467	<	public void run(){
468	<	try {
469	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
470	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
471	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
472	<	fail("Should block");
473	<	} catch (InterruptedException success) { }
474	<	}
475	<	});
476	<	try {
477	<	t.start();
478	<	Thread.sleep(SHORT_DELAY_MS * 2);
479	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
480	<	t.interrupt();
481	<	t.join();
482	<	} catch (Exception e){
483	<	fail("Unexpected exception");
484	<	}
485	<	}
486	<
487	<
488	<	public void testPeek(){
489	<	LinkedBlockingQueue q = fullQueue(N);
490	<	for (int i = 0; i < N; ++i) {
450	<	assertEquals(i, ((Integer)q.peek()).intValue());
451	<	q.poll();
466	>	Thread t = new Thread(new CheckedRunnable() {
467	>	public void realRun() throws InterruptedException {
468	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
469	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
470	>	try {
471	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
472	>	shouldThrow();
473	>	} catch (InterruptedException success) {}
474	>	}});
475	>
476	>	t.start();
477	>	Thread.sleep(SMALL_DELAY_MS);
478	>	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
479	>	t.interrupt();
480	>	t.join();
481	>	}
482	>
483	>	/**
484	>	* peek returns next element, or null if empty
485	>	*/
486	>	public void testPeek() {
487	>	LinkedBlockingQueue q = populatedQueue(SIZE);
488	>	for (int i = 0; i < SIZE; ++i) {
489	>	assertEquals(i, q.peek());
490	>	assertEquals(i, q.poll());
491		assertTrue(q.peek() == null ||
492	<	i != ((Integer)q.peek()).intValue());
492	>	!q.peek().equals(i));
493		}
494	<	assertNull(q.peek());
494	>	assertNull(q.peek());
495		}
496
497	<	public void testElement(){
498	<	LinkedBlockingQueue q = fullQueue(N);
499	<	for (int i = 0; i < N; ++i) {
500	<	assertEquals(i, ((Integer)q.element()).intValue());
501	<	q.poll();
497	>	/**
498	>	* element returns next element, or throws NSEE if empty
499	>	*/
500	>	public void testElement() {
501	>	LinkedBlockingQueue q = populatedQueue(SIZE);
502	>	for (int i = 0; i < SIZE; ++i) {
503	>	assertEquals(i, q.element());
504	>	assertEquals(i, q.poll());
505		}
506		try {
507		q.element();
508	<	fail("no such element");
509	<	}
468	<	catch (NoSuchElementException success) {}
508	>	shouldThrow();
509	>	} catch (NoSuchElementException success) {}
510		}
511
512	<	public void testRemove(){
513	<	LinkedBlockingQueue q = fullQueue(N);
514	<	for (int i = 0; i < N; ++i) {
515	<	assertEquals(i, ((Integer)q.remove()).intValue());
512	>	/**
513	>	* remove removes next element, or throws NSEE if empty
514	>	*/
515	>	public void testRemove() {
516	>	LinkedBlockingQueue q = populatedQueue(SIZE);
517	>	for (int i = 0; i < SIZE; ++i) {
518	>	assertEquals(i, q.remove());
519		}
520		try {
521		q.remove();
522	<	fail("remove should throw");
523	<	} catch (NoSuchElementException success){
480	<	}
522	>	shouldThrow();
523	>	} catch (NoSuchElementException success) {}
524		}
525
526	<	public void testRemoveElement(){
527	<	LinkedBlockingQueue q = fullQueue(N);
528	<	for (int i = 1; i < N; i+=2) {
526	>	/**
527	>	* remove(x) removes x and returns true if present
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 < N; i+=2) {
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());
539		}
540	<
541	<	public void testContains(){
542	<	LinkedBlockingQueue q = fullQueue(N);
543	<	for (int i = 0; i < N; ++i) {
540	>
541	>	/**
542	>	* An add following remove(x) succeeds
543	>	*/
544	>	public void testRemoveElementAndAdd() throws InterruptedException {
545	>	LinkedBlockingQueue q = new LinkedBlockingQueue();
546	>	assertTrue(q.add(new Integer(1)));
547	>	assertTrue(q.add(new Integer(2)));
548	>	assertTrue(q.remove(new Integer(1)));
549	>	assertTrue(q.remove(new Integer(2)));
550	>	assertTrue(q.add(new Integer(3)));
551	>	assertTrue(q.take() != null);
552	>	}
553	>
554	>	/**
555	>	* contains(x) reports true when elements added but not yet removed
556	>	*/
557	>	public void testContains() {
558	>	LinkedBlockingQueue q = populatedQueue(SIZE);
559	>	for (int i = 0; i < SIZE; ++i) {
560		assertTrue(q.contains(new Integer(i)));
561		q.poll();
562		assertFalse(q.contains(new Integer(i)));
563		}
564		}
565
566	<	public void testClear(){
567	<	LinkedBlockingQueue q = fullQueue(N);
566	>	/**
567	>	* clear removes all elements
568	>	*/
569	>	public void testClear() {
570	>	LinkedBlockingQueue q = populatedQueue(SIZE);
571		q.clear();
572		assertTrue(q.isEmpty());
573		assertEquals(0, q.size());
574	<	assertEquals(N, q.remainingCapacity());
575	<	q.add(new Integer(1));
574	>	assertEquals(SIZE, q.remainingCapacity());
575	>	q.add(one);
576		assertFalse(q.isEmpty());
577	+	assertTrue(q.contains(one));
578		q.clear();
579		assertTrue(q.isEmpty());
580		}
581
582	<	public void testContainsAll(){
583	<	LinkedBlockingQueue q = fullQueue(N);
584	<	LinkedBlockingQueue p = new LinkedBlockingQueue(N);
585	<	for (int i = 0; i < N; ++i) {
582	>	/**
583	>	* containsAll(c) is true when c contains a subset of elements
584	>	*/
585	>	public void testContainsAll() {
586	>	LinkedBlockingQueue q = populatedQueue(SIZE);
587	>	LinkedBlockingQueue p = new LinkedBlockingQueue(SIZE);
588	>	for (int i = 0; i < SIZE; ++i) {
589		assertTrue(q.containsAll(p));
590		assertFalse(p.containsAll(q));
591		p.add(new Integer(i));
#	Line 524 | Line 593 | public class LinkedBlockingQueueTest ext
593		assertTrue(p.containsAll(q));
594		}
595
596	<	public void testRetainAll(){
597	<	LinkedBlockingQueue q = fullQueue(N);
598	<	LinkedBlockingQueue p = fullQueue(N);
599	<	for (int i = 0; i < N; ++i) {
596	>	/**
597	>	* retainAll(c) retains only those elements of c and reports true if changed
598	>	*/
599	>	public void testRetainAll() {
600	>	LinkedBlockingQueue q = populatedQueue(SIZE);
601	>	LinkedBlockingQueue p = populatedQueue(SIZE);
602	>	for (int i = 0; i < SIZE; ++i) {
603		boolean changed = q.retainAll(p);
604		if (i == 0)
605		assertFalse(changed);
#	Line 535 | Line 607 | public class LinkedBlockingQueueTest ext
607		assertTrue(changed);
608
609		assertTrue(q.containsAll(p));
610	<	assertEquals(N-i, q.size());
610	>	assertEquals(SIZE-i, q.size());
611		p.remove();
612		}
613		}
614
615	<	public void testRemoveAll(){
616	<	for (int i = 1; i < N; ++i) {
617	<	LinkedBlockingQueue q = fullQueue(N);
618	<	LinkedBlockingQueue p = fullQueue(i);
615	>	/**
616	>	* removeAll(c) removes only those elements of c and reports true if changed
617	>	*/
618	>	public void testRemoveAll() {
619	>	for (int i = 1; i < SIZE; ++i) {
620	>	LinkedBlockingQueue q = populatedQueue(SIZE);
621	>	LinkedBlockingQueue p = populatedQueue(i);
622		assertTrue(q.removeAll(p));
623	<	assertEquals(N-i, q.size());
623	>	assertEquals(SIZE-i, q.size());
624		for (int j = 0; j < i; ++j) {
625		Integer I = (Integer)(p.remove());
626		assertFalse(q.contains(I));
#	Line 553 | Line 628 | public class LinkedBlockingQueueTest ext
628		}
629		}
630
631	<
632	<	public void testToArray(){
633	<	LinkedBlockingQueue q = fullQueue(N);
634	<	Object[] o = q.toArray();
635	<	try {
636	<	for(int i = 0; i < o.length; i++)
637	<	assertEquals(o[i], q.take());
638	<	} catch (InterruptedException e){
564	<	fail("Unexpected exception");
565	<	}
566	<	}
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	<	}
631	>	/**
632	>	* toArray contains all elements
633	>	*/
634	>	public void testToArray() throws InterruptedException {
635	>	LinkedBlockingQueue q = populatedQueue(SIZE);
636	>	Object[] o = q.toArray();
637	>	for (int i = 0; i < o.length; i++)
638	>	assertEquals(o[i], q.take());
639		}
640
641	<	public void testIteratorOrdering() {
641	>	/**
642	>	* toArray(a) contains all elements
643	>	*/
644	>	public void testToArray2() throws InterruptedException {
645	>	LinkedBlockingQueue q = populatedQueue(SIZE);
646	>	Integer[] ints = new Integer[SIZE];
647	>	ints = (Integer[])q.toArray(ints);
648	>	for (int i = 0; i < ints.length; i++)
649	>	assertEquals(ints[i], q.take());
650	>	}
651
652	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
652	>	/**
653	>	* toArray(null) throws NPE
654	>	*/
655	>	public void testToArray_BadArg() {
656	>	LinkedBlockingQueue q = populatedQueue(SIZE);
657	>	try {
658	>	Object o[] = q.toArray(null);
659	>	shouldThrow();
660	>	} catch (NullPointerException success) {}
661	>	}
662
663	<	q.add(new Integer(1));
664	<	q.add(new Integer(2));
665	<	q.add(new Integer(3));
663	>	/**
664	>	* toArray with incompatible array type throws CCE
665	>	*/
666	>	public void testToArray1_BadArg() {
667	>	LinkedBlockingQueue q = populatedQueue(SIZE);
668	>	try {
669	>	Object o[] = q.toArray(new String[10]);
670	>	shouldThrow();
671	>	} catch (ArrayStoreException success) {}
672	>	}
673
600	–	assertEquals("queue should be full", 0, q.remainingCapacity());
674
675	<	int k = 0;
676	<	for (Iterator it = q.iterator(); it.hasNext();) {
677	<	int i = ((Integer)(it.next())).intValue();
678	<	assertEquals("items should come out in order", ++k, i);
675	>	/**
676	>	* iterator iterates through all elements
677	>	*/
678	>	public void testIterator() throws InterruptedException {
679	>	LinkedBlockingQueue q = populatedQueue(SIZE);
680	>	Iterator it = q.iterator();
681	>	while (it.hasNext()) {
682	>	assertEquals(it.next(), q.take());
683		}
607	–
608	–	assertEquals("should go through 3 elements", 3, k);
684		}
685
686	<	public void testWeaklyConsistentIteration () {
687	<
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	+	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
615	–	q.add(new Integer(1));
616	–	q.add(new Integer(2));
617	–	q.add(new Integer(3));
705
706	<	try {
707	<	for (Iterator it = q.iterator(); it.hasNext();) {
708	<	q.remove();
709	<	it.next();
710	<	}
711	<	}
712	<	catch (ConcurrentModificationException e) {
713	<	fail("weakly consistent iterator; should not get CME");
706	>	/**
707	>	* iterator ordering is FIFO
708	>	*/
709	>	public void testIteratorOrdering() {
710	>	final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
711	>	q.add(one);
712	>	q.add(two);
713	>	q.add(three);
714	>	assertEquals(0, q.remainingCapacity());
715	>	int k = 0;
716	>	for (Iterator it = q.iterator(); it.hasNext();) {
717	>	assertEquals(++k, it.next());
718		}
719	+	assertEquals(3, k);
720	+	}
721
722	<	assertEquals("queue should be empty again", 0, q.size());
722	>	/**
723	>	* Modifications do not cause iterators to fail
724	>	*/
725	>	public void testWeaklyConsistentIteration() {
726	>	final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
727	>	q.add(one);
728	>	q.add(two);
729	>	q.add(three);
730	>	for (Iterator it = q.iterator(); it.hasNext();) {
731	>	q.remove();
732	>	it.next();
733	>	}
734	>	assertEquals(0, q.size());
735		}
736
737
738	<	public void testToString(){
739	<	LinkedBlockingQueue q = fullQueue(N);
738	>	/**
739	>	* toString contains toStrings of elements
740	>	*/
741	>	public void testToString() {
742	>	LinkedBlockingQueue q = populatedQueue(SIZE);
743		String s = q.toString();
744	<	for (int i = 0; i < N; ++i) {
744	>	for (int i = 0; i < SIZE; ++i) {
745		assertTrue(s.indexOf(String.valueOf(i)) >= 0);
746		}
747	<	}
747	>	}
748
749
750	+	/**
751	+	* offer transfers elements across Executor tasks
752	+	*/
753		public void testOfferInExecutor() {
643	–
754		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
755	+	q.add(one);
756	+	q.add(two);
757	+	ExecutorService executor = Executors.newFixedThreadPool(2);
758	+	executor.execute(new CheckedRunnable() {
759	+	public void realRun() throws InterruptedException {
760	+	assertFalse(q.offer(three));
761	+	assertTrue(q.offer(three, MEDIUM_DELAY_MS, MILLISECONDS));
762	+	assertEquals(0, q.remainingCapacity());
763	+	}});
764	+
765	+	executor.execute(new CheckedRunnable() {
766	+	public void realRun() throws InterruptedException {
767	+	Thread.sleep(SMALL_DELAY_MS);
768	+	assertSame(one, q.take());
769	+	}});
770
771	<	q.add(new Integer(1));
772	<	q.add(new Integer(2));
771	>	joinPool(executor);
772	>	}
773
774	+	/**
775	+	* poll retrieves elements across Executor threads
776	+	*/
777	+	public void testPollInExecutor() {
778	+	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
779		ExecutorService executor = Executors.newFixedThreadPool(2);
780	+	executor.execute(new CheckedRunnable() {
781	+	public void realRun() throws InterruptedException {
782	+	assertNull(q.poll());
783	+	assertSame(one, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
784	+	assertTrue(q.isEmpty());
785	+	}});
786	+
787	+	executor.execute(new CheckedRunnable() {
788	+	public void realRun() throws InterruptedException {
789	+	Thread.sleep(SMALL_DELAY_MS);
790	+	q.put(one);
791	+	}});
792
793	<	executor.execute(new Runnable() {
794	<	public void run() {
653	<	assertFalse("offer should be rejected", q.offer(new Integer(3)));
654	<	try {
655	<	assertTrue("offer should be accepted", q.offer(new Integer(3), MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
656	<	assertEquals(0, q.remainingCapacity());
657	<	}
658	<	catch (InterruptedException e) {
659	<	fail("should not be interrupted");
660	<	}
661	<	}
662	<	});
793	>	joinPool(executor);
794	>	}
795
796	<	executor.execute(new Runnable() {
797	<	public void run() {
798	<	try {
799	<	Thread.sleep(MEDIUM_DELAY_MS);
800	<	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();
796	>	/**
797	>	* A deserialized serialized queue has same elements in same order
798	>	*/
799	>	public void testSerialization() throws Exception {
800	>	LinkedBlockingQueue q = populatedQueue(SIZE);
801
802	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
803	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
804	+	out.writeObject(q);
805	+	out.close();
806	+
807	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
808	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
809	+	LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject();
810	+	assertEquals(q.size(), r.size());
811	+	while (!q.isEmpty())
812	+	assertEquals(q.remove(), r.remove());
813		}
814
815	<	public void testPollInExecutor() {
815	>	/**
816	>	* drainTo(null) throws NPE
817	>	*/
818	>	public void testDrainToNull() {
819	>	LinkedBlockingQueue q = populatedQueue(SIZE);
820	>	try {
821	>	q.drainTo(null);
822	>	shouldThrow();
823	>	} catch (NullPointerException success) {}
824	>	}
825
826	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
826	>	/**
827	>	* drainTo(this) throws IAE
828	>	*/
829	>	public void testDrainToSelf() {
830	>	LinkedBlockingQueue q = populatedQueue(SIZE);
831	>	try {
832	>	q.drainTo(q);
833	>	shouldThrow();
834	>	} catch (IllegalArgumentException success) {}
835	>	}
836
837	<	ExecutorService executor = Executors.newFixedThreadPool(2);
837	>	/**
838	>	* drainTo(c) empties queue into another collection c
839	>	*/
840	>	public void testDrainTo() {
841	>	LinkedBlockingQueue q = populatedQueue(SIZE);
842	>	ArrayList l = new ArrayList();
843	>	q.drainTo(l);
844	>	assertEquals(q.size(), 0);
845	>	assertEquals(l.size(), SIZE);
846	>	for (int i = 0; i < SIZE; ++i)
847	>	assertEquals(l.get(i), new Integer(i));
848	>	q.add(zero);
849	>	q.add(one);
850	>	assertFalse(q.isEmpty());
851	>	assertTrue(q.contains(zero));
852	>	assertTrue(q.contains(one));
853	>	l.clear();
854	>	q.drainTo(l);
855	>	assertEquals(q.size(), 0);
856	>	assertEquals(l.size(), 2);
857	>	for (int i = 0; i < 2; ++i)
858	>	assertEquals(l.get(i), new Integer(i));
859	>	}
860
861	<	executor.execute(new Runnable() {
862	<	public void run() {
863	<	assertNull("poll should fail", q.poll());
864	<	try {
865	<	assertTrue(null != q.poll(MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
866	<	assertTrue(q.isEmpty());
867	<	}
868	<	catch (InterruptedException e) {
869	<	fail("should not be interrupted");
695	<	}
696	<	}
697	<	});
861	>	/**
862	>	* drainTo empties full queue, unblocking a waiting put.
863	>	*/
864	>	public void testDrainToWithActivePut() throws InterruptedException {
865	>	final LinkedBlockingQueue q = populatedQueue(SIZE);
866	>	Thread t = new Thread(new CheckedRunnable() {
867	>	public void realRun() throws InterruptedException {
868	>	q.put(new Integer(SIZE+1));
869	>	}});
870
871	<	executor.execute(new Runnable() {
872	<	public void run() {
873	<	try {
874	<	Thread.sleep(MEDIUM_DELAY_MS);
875	<	q.put(new Integer(1));
876	<	}
877	<	catch (InterruptedException e) {
878	<	fail("should not be interrupted");
879	<	}
880	<	}
881	<	});
882	<
883	<	executor.shutdown();
871	>	t.start();
872	>	ArrayList l = new ArrayList();
873	>	q.drainTo(l);
874	>	assertTrue(l.size() >= SIZE);
875	>	for (int i = 0; i < SIZE; ++i)
876	>	assertEquals(l.get(i), new Integer(i));
877	>	t.join();
878	>	assertTrue(q.size() + l.size() >= SIZE);
879	>	}
880	>
881	>	/**
882	>	* drainTo(null, n) throws NPE
883	>	*/
884	>	public void testDrainToNullN() {
885	>	LinkedBlockingQueue q = populatedQueue(SIZE);
886	>	try {
887	>	q.drainTo(null, 0);
888	>	shouldThrow();
889	>	} catch (NullPointerException success) {}
890	>	}
891
892	+	/**
893	+	* drainTo(this, n) throws IAE
894	+	*/
895	+	public void testDrainToSelfN() {
896	+	LinkedBlockingQueue q = populatedQueue(SIZE);
897	+	try {
898	+	q.drainTo(q, 0);
899	+	shouldThrow();
900	+	} catch (IllegalArgumentException success) {}
901		}
902
903	<	public void testSerialization() {
904	<	LinkedBlockingQueue q = fullQueue(N);
905	<
906	<	try {
907	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
908	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
909	<	out.writeObject(q);
910	<	out.close();
911	<
912	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
913	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
914	<	LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject();
915	<	assertEquals(q.size(), r.size());
916	<	while (!q.isEmpty())
917	<	assertEquals(q.remove(), r.remove());
918	<	} catch(Exception e){
731	<	e.printStackTrace();
732	<	fail("unexpected exception");
903	>	/**
904	>	* drainTo(c, n) empties first max {n, size} elements of queue into c
905	>	*/
906	>	public void testDrainToN() {
907	>	LinkedBlockingQueue q = new LinkedBlockingQueue();
908	>	for (int i = 0; i < SIZE + 2; ++i) {
909	>	for (int j = 0; j < SIZE; j++)
910	>	assertTrue(q.offer(new Integer(j)));
911	>	ArrayList l = new ArrayList();
912	>	q.drainTo(l, i);
913	>	int k = (i < SIZE)? i : SIZE;
914	>	assertEquals(l.size(), k);
915	>	assertEquals(q.size(), SIZE-k);
916	>	for (int j = 0; j < k; ++j)
917	>	assertEquals(l.get(j), new Integer(j));
918	>	while (q.poll() != null) ;
919		}
920		}
921

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