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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 1.18 by jsr166, Sat Nov 21 10:25:05 2009 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	>	Thread t = new Thread(new CheckedRunnable() {
288	>	public void realRun() {
289	>	int added = 0;
290	>	try {
291	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
292	>	for (int i = 0; i < SIZE; ++i) {
293	>	q.put(new Integer(i));
294	>	++added;
295	>	}
296	>	q.put(new Integer(SIZE));
297	>	threadShouldThrow();
298	>	} catch (InterruptedException success) {
299	>	threadAssertEquals(added, SIZE);
300	>	}
301	>	}});
302	>
303		t.start();
304	<	try {
305	<	Thread.sleep(SHORT_DELAY_MS);
306	<	t.interrupt();
250	<	t.join();
251	<	}
252	<	catch (InterruptedException ie) {
253	<	fail("Unexpected exception");
254	<	}
304	>	Thread.sleep(SHORT_DELAY_MS);
305	>	t.interrupt();
306	>	t.join();
307		}
308
309	<	public void testPutWithTake() {
309	>	/**
310	>	* put blocks waiting for take when full
311	>	*/
312	>	public void testPutWithTake() throws InterruptedException {
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);
274	<	}
314	>	Thread t = new Thread(new CheckedRunnable() {
315	>	public void realRun() {
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	>	threadShouldThrow();
327	>	} catch (InterruptedException success) {
328	>	threadAssertTrue(added >= 2);
329		}
330	<	});
331	<	try {
332	<	t.start();
333	<	Thread.sleep(SHORT_DELAY_MS);
334	<	q.take();
335	<	t.interrupt();
336	<	t.join();
283	<	} catch (Exception e){
284	<	fail("Unexpected exception");
285	<	}
330	>	}});
331	>
332	>	t.start();
333	>	Thread.sleep(SHORT_DELAY_MS);
334	>	q.take();
335	>	t.interrupt();
336	>	t.join();
337		}
338
339	<	public void testTimedOffer() {
339	>	/**
340	>	* timed offer times out if full and elements not taken
341	>	*/
342	>	public void testTimedOffer() throws InterruptedException {
343		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
344	<	Thread t = new Thread(new Runnable() {
345	<	public void run(){
346	<	try {
347	<	q.put(new Object());
348	<	q.put(new Object());
349	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
350	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
351	<	fail("Should block");
352	<	} catch (InterruptedException success){}
353	<	}
354	<	});
355	<
302	<	try {
303	<	t.start();
304	<	Thread.sleep(SHORT_DELAY_MS);
305	<	t.interrupt();
306	<	t.join();
307	<	} catch (Exception e){
308	<	fail("Unexpected exception");
309	<	}
344	>	Thread t = new ThreadShouldThrow(InterruptedException.class) {
345	>	public void realRun() throws InterruptedException {
346	>	q.put(new Object());
347	>	q.put(new Object());
348	>	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
349	>	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
350	>	}};
351	>
352	>	t.start();
353	>	Thread.sleep(SMALL_DELAY_MS);
354	>	t.interrupt();
355	>	t.join();
356		}
357
358	<	public void testTake(){
359	<	try {
360	<	LinkedBlockingQueue q = fullQueue(N);
361	<	for (int i = 0; i < N; ++i) {
362	<	assertEquals(i, ((Integer)q.take()).intValue());
363	<	}
364	<	} catch (InterruptedException e){
365	<	fail("Unexpected exception");
320	<	}
358	>	/**
359	>	* take retrieves elements in FIFO order
360	>	*/
361	>	public void testTake() throws InterruptedException {
362	>	LinkedBlockingQueue q = populatedQueue(SIZE);
363	>	for (int i = 0; i < SIZE; ++i) {
364	>	assertEquals(i, ((Integer)q.take()).intValue());
365	>	}
366		}
367
368	<	public void testTakeFromEmpty() {
368	>	/**
369	>	* take blocks interruptibly when empty
370	>	*/
371	>	public void testTakeFromEmpty() throws InterruptedException {
372		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
373	<	Thread t = new Thread(new Runnable() {
374	<	public void run(){
375	<	try {
376	<	q.take();
377	<	fail("Should block");
378	<	} catch (InterruptedException success){ }
379	<	}
380	<	});
381	<	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	<	}
373	>	Thread t = new ThreadShouldThrow(InterruptedException.class) {
374	>	public void realRun() throws InterruptedException {
375	>	q.take();
376	>	}};
377	>
378	>	t.start();
379	>	Thread.sleep(SHORT_DELAY_MS);
380	>	t.interrupt();
381	>	t.join();
382		}
383
384	<	public void testBlockingTake(){
385	<	Thread t = new Thread(new Runnable() {
386	<	public void run() {
387	<	try {
388	<	LinkedBlockingQueue q = fullQueue(N);
389	<	for (int i = 0; i < N; ++i) {
390	<	assertEquals(i, ((Integer)q.take()).intValue());
391	<	}
392	<	q.take();
393	<	fail("take should block");
394	<	} catch (InterruptedException success){
395	<	}
396	<	}});
384	>	/**
385	>	* Take removes existing elements until empty, then blocks interruptibly
386	>	*/
387	>	public void testBlockingTake() throws InterruptedException {
388	>	Thread t = new ThreadShouldThrow(InterruptedException.class) {
389	>	public void realRun() throws InterruptedException {
390	>	LinkedBlockingQueue q = populatedQueue(SIZE);
391	>	for (int i = 0; i < SIZE; ++i) {
392	>	assertEquals(i, ((Integer)q.take()).intValue());
393	>	}
394	>	q.take();
395	>	}};
396	>
397		t.start();
398	<	try {
399	<	Thread.sleep(SHORT_DELAY_MS);
400	<	t.interrupt();
360	<	t.join();
361	<	}
362	<	catch (InterruptedException ie) {
363	<	fail("Unexpected exception");
364	<	}
398	>	Thread.sleep(SHORT_DELAY_MS);
399	>	t.interrupt();
400	>	t.join();
401		}
402
403
404	<	public void testPoll(){
405	<	LinkedBlockingQueue q = fullQueue(N);
406	<	for (int i = 0; i < N; ++i) {
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, ((Integer)q.poll()).intValue());
411		}
412	<	assertNull(q.poll());
412	>	assertNull(q.poll());
413		}
414
415	<	public void testTimedPoll0() {
416	<	try {
417	<	LinkedBlockingQueue q = fullQueue(N);
418	<	for (int i = 0; i < N; ++i) {
419	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
420	<	}
421	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
422	<	} catch (InterruptedException e){
423	<	fail("Unexpected exception");
385	<	}
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, ((Integer)q.poll(0, MILLISECONDS)).intValue());
422	>	}
423	>	assertNull(q.poll(0, MILLISECONDS));
424		}
425
426	<	public void testTimedPoll() {
427	<	try {
428	<	LinkedBlockingQueue q = fullQueue(N);
429	<	for (int i = 0; i < N; ++i) {
430	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
431	<	}
432	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
395	<	} catch (InterruptedException e){
396	<	fail("Unexpected exception");
397	<	}
398	<	}
399	<
400	<	public void testInterruptedTimedPoll(){
401	<	Thread t = new Thread(new Runnable() {
402	<	public void run() {
403	<	try {
404	<	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	<	}});
412	<	t.start();
413	<	try {
414	<	Thread.sleep(SHORT_DELAY_MS);
415	<	t.interrupt();
416	<	t.join();
417	<	}
418	<	catch (InterruptedException ie) {
419	<	fail("Unexpected exception");
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, ((Integer)q.poll(SHORT_DELAY_MS, MILLISECONDS)).intValue());
433		}
434	+	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
435		}
436
437	<	public void testTimedPollWithOffer(){
438	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
439	<	Thread t = new Thread(new Runnable() {
440	<	public void run(){
441	<	try {
442	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
443	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
444	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
445	<	fail("Should block");
446	<	} catch (InterruptedException success) { }
437	>	/**
438	>	* Interrupted timed poll throws InterruptedException instead of
439	>	* returning timeout status
440	>	*/
441	>	public void testInterruptedTimedPoll() throws InterruptedException {
442	>	Thread t = new ThreadShouldThrow(InterruptedException.class) {
443	>	public void realRun() throws InterruptedException {
444	>	LinkedBlockingQueue q = populatedQueue(SIZE);
445	>	for (int i = 0; i < SIZE; ++i) {
446	>	threadAssertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, MILLISECONDS)).intValue());
447		}
448	<	});
449	<	try {
450	<	t.start();
451	<	Thread.sleep(SHORT_DELAY_MS * 2);
452	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
453	<	t.interrupt();
454	<	t.join();
455	<	} catch (Exception e){
456	<	fail("Unexpected exception");
457	<	}
458	<	}
459	<
460	<
461	<	public void testPeek(){
462	<	LinkedBlockingQueue q = fullQueue(N);
463	<	for (int i = 0; i < N; ++i) {
448	>	q.poll(SMALL_DELAY_MS, MILLISECONDS);
449	>	}};
450	>
451	>	t.start();
452	>	Thread.sleep(SHORT_DELAY_MS);
453	>	t.interrupt();
454	>	t.join();
455	>	}
456	>
457	>	/**
458	>	*  timed poll before a delayed offer fails; after offer succeeds;
459	>	*  on interruption throws
460	>	*/
461	>	public void testTimedPollWithOffer() throws InterruptedException {
462	>	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
463	>	Thread t = new ThreadShouldThrow(InterruptedException.class) {
464	>	public void realRun() throws InterruptedException {
465	>	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
466	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
467	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
468	>	}};
469	>
470	>	t.start();
471	>	Thread.sleep(SMALL_DELAY_MS);
472	>	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
473	>	t.interrupt();
474	>	t.join();
475	>	}
476	>
477	>	/**
478	>	* peek returns next element, or null if empty
479	>	*/
480	>	public void testPeek() {
481	>	LinkedBlockingQueue q = populatedQueue(SIZE);
482	>	for (int i = 0; i < SIZE; ++i) {
483		assertEquals(i, ((Integer)q.peek()).intValue());
484		q.poll();
485		assertTrue(q.peek() == null ||
486		i != ((Integer)q.peek()).intValue());
487		}
488	<	assertNull(q.peek());
488	>	assertNull(q.peek());
489		}
490
491	<	public void testElement(){
492	<	LinkedBlockingQueue q = fullQueue(N);
493	<	for (int i = 0; i < N; ++i) {
491	>	/**
492	>	* element returns next element, or throws NSEE if empty
493	>	*/
494	>	public void testElement() {
495	>	LinkedBlockingQueue q = populatedQueue(SIZE);
496	>	for (int i = 0; i < SIZE; ++i) {
497		assertEquals(i, ((Integer)q.element()).intValue());
498		q.poll();
499		}
500		try {
501		q.element();
502	<	fail("no such element");
503	<	}
468	<	catch (NoSuchElementException success) {}
502	>	shouldThrow();
503	>	} catch (NoSuchElementException success) {}
504		}
505
506	<	public void testRemove(){
507	<	LinkedBlockingQueue q = fullQueue(N);
508	<	for (int i = 0; i < N; ++i) {
506	>	/**
507	>	* remove removes next element, or throws NSEE if empty
508	>	*/
509	>	public void testRemove() {
510	>	LinkedBlockingQueue q = populatedQueue(SIZE);
511	>	for (int i = 0; i < SIZE; ++i) {
512		assertEquals(i, ((Integer)q.remove()).intValue());
513		}
514		try {
515		q.remove();
516	<	fail("remove should throw");
517	<	} catch (NoSuchElementException success){
480	<	}
516	>	shouldThrow();
517	>	} catch (NoSuchElementException success) {}
518		}
519
520	<	public void testRemoveElement(){
521	<	LinkedBlockingQueue q = fullQueue(N);
522	<	for (int i = 1; i < N; i+=2) {
520	>	/**
521	>	* remove(x) removes x and returns true if present
522	>	*/
523	>	public void testRemoveElement() {
524	>	LinkedBlockingQueue q = populatedQueue(SIZE);
525	>	for (int i = 1; i < SIZE; i+=2) {
526		assertTrue(q.remove(new Integer(i)));
527		}
528	<	for (int i = 0; i < N; i+=2) {
528	>	for (int i = 0; i < SIZE; i+=2) {
529		assertTrue(q.remove(new Integer(i)));
530		assertFalse(q.remove(new Integer(i+1)));
531		}
532		assertTrue(q.isEmpty());
533		}
534	<
535	<	public void testContains(){
536	<	LinkedBlockingQueue q = fullQueue(N);
537	<	for (int i = 0; i < N; ++i) {
534	>
535	>	/**
536	>	* An add following remove(x) succeeds
537	>	*/
538	>	public void testRemoveElementAndAdd() throws InterruptedException {
539	>	LinkedBlockingQueue q = new LinkedBlockingQueue();
540	>	assertTrue(q.add(new Integer(1)));
541	>	assertTrue(q.add(new Integer(2)));
542	>	assertTrue(q.remove(new Integer(1)));
543	>	assertTrue(q.remove(new Integer(2)));
544	>	assertTrue(q.add(new Integer(3)));
545	>	assertTrue(q.take() != null);
546	>	}
547	>
548	>	/**
549	>	* contains(x) reports true when elements added but not yet removed
550	>	*/
551	>	public void testContains() {
552	>	LinkedBlockingQueue q = populatedQueue(SIZE);
553	>	for (int i = 0; i < SIZE; ++i) {
554		assertTrue(q.contains(new Integer(i)));
555		q.poll();
556		assertFalse(q.contains(new Integer(i)));
557		}
558		}
559
560	<	public void testClear(){
561	<	LinkedBlockingQueue q = fullQueue(N);
560	>	/**
561	>	* clear removes all elements
562	>	*/
563	>	public void testClear() {
564	>	LinkedBlockingQueue q = populatedQueue(SIZE);
565		q.clear();
566		assertTrue(q.isEmpty());
567		assertEquals(0, q.size());
568	<	assertEquals(N, q.remainingCapacity());
569	<	q.add(new Integer(1));
568	>	assertEquals(SIZE, q.remainingCapacity());
569	>	q.add(one);
570		assertFalse(q.isEmpty());
571	+	assertTrue(q.contains(one));
572		q.clear();
573		assertTrue(q.isEmpty());
574		}
575
576	<	public void testContainsAll(){
577	<	LinkedBlockingQueue q = fullQueue(N);
578	<	LinkedBlockingQueue p = new LinkedBlockingQueue(N);
579	<	for (int i = 0; i < N; ++i) {
576	>	/**
577	>	* containsAll(c) is true when c contains a subset of elements
578	>	*/
579	>	public void testContainsAll() {
580	>	LinkedBlockingQueue q = populatedQueue(SIZE);
581	>	LinkedBlockingQueue p = new LinkedBlockingQueue(SIZE);
582	>	for (int i = 0; i < SIZE; ++i) {
583		assertTrue(q.containsAll(p));
584		assertFalse(p.containsAll(q));
585		p.add(new Integer(i));
#	Line 524 | Line 587 | public class LinkedBlockingQueueTest ext
587		assertTrue(p.containsAll(q));
588		}
589
590	<	public void testRetainAll(){
591	<	LinkedBlockingQueue q = fullQueue(N);
592	<	LinkedBlockingQueue p = fullQueue(N);
593	<	for (int i = 0; i < N; ++i) {
590	>	/**
591	>	* retainAll(c) retains only those elements of c and reports true if changed
592	>	*/
593	>	public void testRetainAll() {
594	>	LinkedBlockingQueue q = populatedQueue(SIZE);
595	>	LinkedBlockingQueue p = populatedQueue(SIZE);
596	>	for (int i = 0; i < SIZE; ++i) {
597		boolean changed = q.retainAll(p);
598		if (i == 0)
599		assertFalse(changed);
#	Line 535 | Line 601 | public class LinkedBlockingQueueTest ext
601		assertTrue(changed);
602
603		assertTrue(q.containsAll(p));
604	<	assertEquals(N-i, q.size());
604	>	assertEquals(SIZE-i, q.size());
605		p.remove();
606		}
607		}
608
609	<	public void testRemoveAll(){
610	<	for (int i = 1; i < N; ++i) {
611	<	LinkedBlockingQueue q = fullQueue(N);
612	<	LinkedBlockingQueue p = fullQueue(i);
609	>	/**
610	>	* removeAll(c) removes only those elements of c and reports true if changed
611	>	*/
612	>	public void testRemoveAll() {
613	>	for (int i = 1; i < SIZE; ++i) {
614	>	LinkedBlockingQueue q = populatedQueue(SIZE);
615	>	LinkedBlockingQueue p = populatedQueue(i);
616		assertTrue(q.removeAll(p));
617	<	assertEquals(N-i, q.size());
617	>	assertEquals(SIZE-i, q.size());
618		for (int j = 0; j < i; ++j) {
619		Integer I = (Integer)(p.remove());
620		assertFalse(q.contains(I));
#	Line 553 | Line 622 | public class LinkedBlockingQueueTest ext
622		}
623		}
624
625	+	/**
626	+	* toArray contains all elements
627	+	*/
628	+	public void testToArray() throws InterruptedException {
629	+	LinkedBlockingQueue q = populatedQueue(SIZE);
630	+	Object[] o = q.toArray();
631	+	for (int i = 0; i < o.length; i++)
632	+	assertEquals(o[i], q.take());
633	+	}
634	+
635	+	/**
636	+	* toArray(a) contains all elements
637	+	*/
638	+	public void testToArray2() throws InterruptedException {
639	+	LinkedBlockingQueue q = populatedQueue(SIZE);
640	+	Integer[] ints = new Integer[SIZE];
641	+	ints = (Integer[])q.toArray(ints);
642	+	for (int i = 0; i < ints.length; i++)
643	+	assertEquals(ints[i], q.take());
644	+	}
645
646	<	public void testToArray(){
647	<	LinkedBlockingQueue q = fullQueue(N);
648	<	Object[] o = q.toArray();
649	<	try {
650	<	for(int i = 0; i < o.length; i++)
651	<	assertEquals(o[i], q.take());
652	<	} catch (InterruptedException e){
653	<	fail("Unexpected exception");
654	<	}
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	<	}
646	>	/**
647	>	* toArray(null) throws NPE
648	>	*/
649	>	public void testToArray_BadArg() {
650	>	try {
651	>	LinkedBlockingQueue q = populatedQueue(SIZE);
652	>	Object o[] = q.toArray(null);
653	>	shouldThrow();
654	>	} catch (NullPointerException success) {}
655		}
656
657	<	public void testIteratorOrdering() {
657	>	/**
658	>	* toArray with incompatible array type throws CCE
659	>	*/
660	>	public void testToArray1_BadArg() {
661	>	try {
662	>	LinkedBlockingQueue q = populatedQueue(SIZE);
663	>	Object o[] = q.toArray(new String[10] );
664	>	shouldThrow();
665	>	} catch (ArrayStoreException success) {}
666	>	}
667
594	–	final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
668
669	<	q.add(new Integer(1));
670	<	q.add(new Integer(2));
671	<	q.add(new Integer(3));
669	>	/**
670	>	* iterator iterates through all elements
671	>	*/
672	>	public void testIterator() throws InterruptedException {
673	>	LinkedBlockingQueue q = populatedQueue(SIZE);
674	>	Iterator it = q.iterator();
675	>	while (it.hasNext()) {
676	>	assertEquals(it.next(), q.take());
677	>	}
678	>	}
679	>
680	>	/**
681	>	* iterator.remove removes current element
682	>	*/
683	>	public void testIteratorRemove () {
684	>	final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
685	>	q.add(two);
686	>	q.add(one);
687	>	q.add(three);
688	>
689	>	Iterator it = q.iterator();
690	>	it.next();
691	>	it.remove();
692	>
693	>	it = q.iterator();
694	>	assertEquals(it.next(), one);
695	>	assertEquals(it.next(), three);
696	>	assertFalse(it.hasNext());
697	>	}
698
600	–	assertEquals("queue should be full", 0, q.remainingCapacity());
699
700	+	/**
701	+	* iterator ordering is FIFO
702	+	*/
703	+	public void testIteratorOrdering() {
704	+	final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
705	+	q.add(one);
706	+	q.add(two);
707	+	q.add(three);
708	+	assertEquals(0, q.remainingCapacity());
709		int k = 0;
710		for (Iterator it = q.iterator(); it.hasNext();) {
711		int i = ((Integer)(it.next())).intValue();
712	<	assertEquals("items should come out in order", ++k, i);
712	>	assertEquals(++k, i);
713		}
714	<
608	<	assertEquals("should go through 3 elements", 3, k);
714	>	assertEquals(3, k);
715		}
716
717	+	/**
718	+	* Modifications do not cause iterators to fail
719	+	*/
720		public void testWeaklyConsistentIteration () {
612	–
721		final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
722	<
723	<	q.add(new Integer(1));
724	<	q.add(new Integer(2));
725	<	q.add(new Integer(3));
726	<
727	<	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");
722	>	q.add(one);
723	>	q.add(two);
724	>	q.add(three);
725	>	for (Iterator it = q.iterator(); it.hasNext();) {
726	>	q.remove();
727	>	it.next();
728		}
729	<
629	<	assertEquals("queue should be empty again", 0, q.size());
729	>	assertEquals(0, q.size());
730		}
731
732
733	<	public void testToString(){
734	<	LinkedBlockingQueue q = fullQueue(N);
733	>	/**
734	>	* toString contains toStrings of elements
735	>	*/
736	>	public void testToString() {
737	>	LinkedBlockingQueue q = populatedQueue(SIZE);
738		String s = q.toString();
739	<	for (int i = 0; i < N; ++i) {
739	>	for (int i = 0; i < SIZE; ++i) {
740		assertTrue(s.indexOf(String.valueOf(i)) >= 0);
741		}
742	<	}
742	>	}
743
744
745	+	/**
746	+	* offer transfers elements across Executor tasks
747	+	*/
748		public void testOfferInExecutor() {
643	–
749		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
750	+	q.add(one);
751	+	q.add(two);
752	+	ExecutorService executor = Executors.newFixedThreadPool(2);
753	+	executor.execute(new CheckedRunnable() {
754	+	public void realRun() throws InterruptedException {
755	+	threadAssertFalse(q.offer(three));
756	+	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, MILLISECONDS));
757	+	threadAssertEquals(0, q.remainingCapacity());
758	+	}});
759	+
760	+	executor.execute(new CheckedRunnable() {
761	+	public void realRun() throws InterruptedException {
762	+	Thread.sleep(SMALL_DELAY_MS);
763	+	threadAssertEquals(one, q.take());
764	+	}});
765
766	<	q.add(new Integer(1));
767	<	q.add(new Integer(2));
766	>	joinPool(executor);
767	>	}
768
769	+	/**
770	+	* poll retrieves elements across Executor threads
771	+	*/
772	+	public void testPollInExecutor() {
773	+	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
774		ExecutorService executor = Executors.newFixedThreadPool(2);
775	+	executor.execute(new CheckedRunnable() {
776	+	public void realRun() throws InterruptedException {
777	+	threadAssertNull(q.poll());
778	+	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
779	+	threadAssertTrue(q.isEmpty());
780	+	}});
781	+
782	+	executor.execute(new CheckedRunnable() {
783	+	public void realRun() throws InterruptedException {
784	+	Thread.sleep(SMALL_DELAY_MS);
785	+	q.put(one);
786	+	}});
787
788	<	executor.execute(new Runnable() {
789	<	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	<	});
788	>	joinPool(executor);
789	>	}
790
791	<	executor.execute(new Runnable() {
792	<	public void run() {
793	<	try {
794	<	Thread.sleep(MEDIUM_DELAY_MS);
795	<	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();
791	>	/**
792	>	* A deserialized serialized queue has same elements in same order
793	>	*/
794	>	public void testSerialization() throws Exception {
795	>	LinkedBlockingQueue q = populatedQueue(SIZE);
796
797	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
798	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
799	+	out.writeObject(q);
800	+	out.close();
801	+
802	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
803	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
804	+	LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject();
805	+	assertEquals(q.size(), r.size());
806	+	while (!q.isEmpty())
807	+	assertEquals(q.remove(), r.remove());
808		}
809
810	<	public void testPollInExecutor() {
810	>	/**
811	>	* drainTo(null) throws NPE
812	>	*/
813	>	public void testDrainToNull() {
814	>	LinkedBlockingQueue q = populatedQueue(SIZE);
815	>	try {
816	>	q.drainTo(null);
817	>	shouldThrow();
818	>	} catch (NullPointerException success) {}
819	>	}
820
821	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
821	>	/**
822	>	* drainTo(this) throws IAE
823	>	*/
824	>	public void testDrainToSelf() {
825	>	LinkedBlockingQueue q = populatedQueue(SIZE);
826	>	try {
827	>	q.drainTo(q);
828	>	shouldThrow();
829	>	} catch (IllegalArgumentException success) {}
830	>	}
831
832	<	ExecutorService executor = Executors.newFixedThreadPool(2);
832	>	/**
833	>	* drainTo(c) empties queue into another collection c
834	>	*/
835	>	public void testDrainTo() {
836	>	LinkedBlockingQueue q = populatedQueue(SIZE);
837	>	ArrayList l = new ArrayList();
838	>	q.drainTo(l);
839	>	assertEquals(q.size(), 0);
840	>	assertEquals(l.size(), SIZE);
841	>	for (int i = 0; i < SIZE; ++i)
842	>	assertEquals(l.get(i), new Integer(i));
843	>	q.add(zero);
844	>	q.add(one);
845	>	assertFalse(q.isEmpty());
846	>	assertTrue(q.contains(zero));
847	>	assertTrue(q.contains(one));
848	>	l.clear();
849	>	q.drainTo(l);
850	>	assertEquals(q.size(), 0);
851	>	assertEquals(l.size(), 2);
852	>	for (int i = 0; i < 2; ++i)
853	>	assertEquals(l.get(i), new Integer(i));
854	>	}
855
856	<	executor.execute(new Runnable() {
857	<	public void run() {
858	<	assertNull("poll should fail", q.poll());
859	<	try {
860	<	assertTrue(null != q.poll(MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
861	<	assertTrue(q.isEmpty());
862	<	}
863	<	catch (InterruptedException e) {
864	<	fail("should not be interrupted");
695	<	}
696	<	}
697	<	});
856	>	/**
857	>	* drainTo empties full queue, unblocking a waiting put.
858	>	*/
859	>	public void testDrainToWithActivePut() throws InterruptedException {
860	>	final LinkedBlockingQueue q = populatedQueue(SIZE);
861	>	Thread t = new Thread(new CheckedRunnable() {
862	>	public void realRun() throws InterruptedException {
863	>	q.put(new Integer(SIZE+1));
864	>	}});
865
866	<	executor.execute(new Runnable() {
867	<	public void run() {
868	<	try {
869	<	Thread.sleep(MEDIUM_DELAY_MS);
870	<	q.put(new Integer(1));
871	<	}
872	<	catch (InterruptedException e) {
873	<	fail("should not be interrupted");
874	<	}
708	<	}
709	<	});
710	<
711	<	executor.shutdown();
866	>	t.start();
867	>	ArrayList l = new ArrayList();
868	>	q.drainTo(l);
869	>	assertTrue(l.size() >= SIZE);
870	>	for (int i = 0; i < SIZE; ++i)
871	>	assertEquals(l.get(i), new Integer(i));
872	>	t.join();
873	>	assertTrue(q.size() + l.size() >= SIZE);
874	>	}
875
876	+	/**
877	+	* drainTo(null, n) throws NPE
878	+	*/
879	+	public void testDrainToNullN() {
880	+	LinkedBlockingQueue q = populatedQueue(SIZE);
881	+	try {
882	+	q.drainTo(null, 0);
883	+	shouldThrow();
884	+	} catch (NullPointerException success) {}
885	+	}
886	+
887	+	/**
888	+	* drainTo(this, n) throws IAE
889	+	*/
890	+	public void testDrainToSelfN() {
891	+	LinkedBlockingQueue q = populatedQueue(SIZE);
892	+	try {
893	+	q.drainTo(q, 0);
894	+	shouldThrow();
895	+	} catch (IllegalArgumentException success) {}
896		}
897
898	<	public void testSerialization() {
899	<	LinkedBlockingQueue q = fullQueue(N);
900	<
901	<	try {
902	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
903	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
904	<	out.writeObject(q);
905	<	out.close();
906	<
907	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
908	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
909	<	LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject();
910	<	assertEquals(q.size(), r.size());
911	<	while (!q.isEmpty())
912	<	assertEquals(q.remove(), r.remove());
913	<	} catch(Exception e){
731	<	e.printStackTrace();
732	<	fail("unexpected exception");
898	>	/**
899	>	* drainTo(c, n) empties first max {n, size} elements of queue into c
900	>	*/
901	>	public void testDrainToN() {
902	>	LinkedBlockingQueue q = new LinkedBlockingQueue();
903	>	for (int i = 0; i < SIZE + 2; ++i) {
904	>	for (int j = 0; j < SIZE; j++)
905	>	assertTrue(q.offer(new Integer(j)));
906	>	ArrayList l = new ArrayList();
907	>	q.drainTo(l, i);
908	>	int k = (i < SIZE)? i : SIZE;
909	>	assertEquals(l.size(), k);
910	>	assertEquals(q.size(), SIZE-k);
911	>	for (int j = 0; j < k; ++j)
912	>	assertEquals(l.get(j), new Integer(j));
913	>	while (q.poll() != null) ;
914		}
915		}
916

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