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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 1.43 by jsr166, Sat May 21 06:24:33 2011 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 static java.util.concurrent.TimeUnit.MILLISECONDS;
13		import java.io.*;
14
15		public class LinkedBlockingQueueTest extends JSR166TestCase {
16
17	+	public static class Unbounded extends BlockingQueueTest {
18	+	protected BlockingQueue emptyCollection() {
19	+	return new LinkedBlockingQueue();
20	+	}
21	+	}
22	+
23	+	public static class Bounded extends BlockingQueueTest {
24	+	protected BlockingQueue emptyCollection() {
25	+	return new LinkedBlockingQueue(20);
26	+	}
27	+	}
28	+
29		public static void main(String[] args) {
30	<	junit.textui.TestRunner.run (suite());
30	>	junit.textui.TestRunner.run(suite());
31		}
32
33		public static Test suite() {
34	<	return new TestSuite(LinkedBlockingQueueTest.class);
34	>	return newTestSuite(LinkedBlockingQueueTest.class,
35	>	new Unbounded().testSuite(),
36	>	new Bounded().testSuite());
37		}
38
39
#	Line 25 | Line 41 | public class LinkedBlockingQueueTest ext
41		* Create a queue of given size containing consecutive
42		* Integers 0 ... n.
43		*/
44	<	private LinkedBlockingQueue populatedQueue(int n) {
45	<	LinkedBlockingQueue q = new LinkedBlockingQueue(n);
44	>	private LinkedBlockingQueue<Integer> populatedQueue(int n) {
45	>	LinkedBlockingQueue<Integer> q =
46	>	new LinkedBlockingQueue<Integer>(n);
47		assertTrue(q.isEmpty());
48	<	for(int i = 0; i < n; i++)
49	<	assertTrue(q.offer(new Integer(i)));
48	>	for (int i = 0; i < n; i++)
49	>	assertTrue(q.offer(new Integer(i)));
50		assertFalse(q.isEmpty());
51		assertEquals(0, q.remainingCapacity());
52	<	assertEquals(n, q.size());
52	>	assertEquals(n, q.size());
53		return q;
54		}
55	<
56	<	public void testConstructor1(){
55	>
56	>	/**
57	>	* A new queue has the indicated capacity, or Integer.MAX_VALUE if
58	>	* none given
59	>	*/
60	>	public void testConstructor1() {
61		assertEquals(SIZE, new LinkedBlockingQueue(SIZE).remainingCapacity());
62	+	assertEquals(Integer.MAX_VALUE, new LinkedBlockingQueue().remainingCapacity());
63		}
64
65	<	public void testConstructor2(){
65	>	/**
66	>	* Constructor throws IAE if capacity argument nonpositive
67	>	*/
68	>	public void testConstructor2() {
69		try {
70		LinkedBlockingQueue q = new LinkedBlockingQueue(0);
71	<	fail("Cannot make zero-sized");
72	<	}
48	<	catch (IllegalArgumentException success) {}
71	>	shouldThrow();
72	>	} catch (IllegalArgumentException success) {}
73		}
74
75	<	public void testConstructor3(){
76	<
75	>	/**
76	>	* Initializing from null Collection throws NPE
77	>	*/
78	>	public void testConstructor3() {
79		try {
80		LinkedBlockingQueue q = new LinkedBlockingQueue(null);
81	<	fail("Cannot make from null collection");
82	<	}
57	<	catch (NullPointerException success) {}
81	>	shouldThrow();
82	>	} catch (NullPointerException success) {}
83		}
84
85	<	public void testConstructor4(){
85	>	/**
86	>	* Initializing from Collection of null elements throws NPE
87	>	*/
88	>	public void testConstructor4() {
89		try {
90		Integer[] ints = new Integer[SIZE];
91		LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
92	<	fail("Cannot make with null elements");
93	<	}
66	<	catch (NullPointerException success) {}
92	>	shouldThrow();
93	>	} catch (NullPointerException success) {}
94		}
95
96	<	public void testConstructor5(){
96	>	/**
97	>	* Initializing from Collection with some null elements throws NPE
98	>	*/
99	>	public void testConstructor5() {
100		try {
101		Integer[] ints = new Integer[SIZE];
102		for (int i = 0; i < SIZE-1; ++i)
103		ints[i] = new Integer(i);
104		LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
105	<	fail("Cannot make with null elements");
106	<	}
77	<	catch (NullPointerException success) {}
105	>	shouldThrow();
106	>	} catch (NullPointerException success) {}
107		}
108
109	<	public void testConstructor6(){
110	<	try {
111	<	Integer[] ints = new Integer[SIZE];
112	<	for (int i = 0; i < SIZE; ++i)
113	<	ints[i] = new Integer(i);
114	<	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
115	<	for (int i = 0; i < SIZE; ++i)
116	<	assertEquals(ints[i], q.poll());
117	<	}
118	<	finally {}
109	>	/**
110	>	* Queue contains all elements of collection used to initialize
111	>	*/
112	>	public void testConstructor6() {
113	>	Integer[] ints = new Integer[SIZE];
114	>	for (int i = 0; i < SIZE; ++i)
115	>	ints[i] = new Integer(i);
116	>	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
117	>	for (int i = 0; i < SIZE; ++i)
118	>	assertEquals(ints[i], q.poll());
119		}
120
121	+	/**
122	+	* Queue transitions from empty to full when elements added
123	+	*/
124		public void testEmptyFull() {
125		LinkedBlockingQueue q = new LinkedBlockingQueue(2);
126		assertTrue(q.isEmpty());
#	Line 97 | Line 129 | public class LinkedBlockingQueueTest ext
129		assertFalse(q.isEmpty());
130		q.add(two);
131		assertFalse(q.isEmpty());
132	<	assertEquals("queue should be full", 0, q.remainingCapacity());
133	<	assertFalse("offer should be rejected", q.offer(three));
132	>	assertEquals(0, q.remainingCapacity());
133	>	assertFalse(q.offer(three));
134		}
135
136	<	public void testRemainingCapacity(){
136	>	/**
137	>	* remainingCapacity decreases on add, increases on remove
138	>	*/
139	>	public void testRemainingCapacity() {
140		LinkedBlockingQueue q = populatedQueue(SIZE);
141		for (int i = 0; i < SIZE; ++i) {
142		assertEquals(i, q.remainingCapacity());
#	Line 115 | Line 150 | public class LinkedBlockingQueueTest ext
150		}
151		}
152
153	<	public void testOfferNull(){
154	<	try {
153	>	/**
154	>	* offer(null) throws NPE
155	>	*/
156	>	public void testOfferNull() {
157	>	try {
158		LinkedBlockingQueue q = new LinkedBlockingQueue(1);
159		q.offer(null);
160	<	fail("should throw NPE");
161	<	} catch (NullPointerException success) { }
160	>	shouldThrow();
161	>	} catch (NullPointerException success) {}
162		}
163
164	<	public void testOffer(){
164	>	/**
165	>	* add(null) throws NPE
166	>	*/
167	>	public void testAddNull() {
168	>	try {
169	>	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
170	>	q.add(null);
171	>	shouldThrow();
172	>	} catch (NullPointerException success) {}
173	>	}
174	>
175	>	/**
176	>	* Offer succeeds if not full; fails if full
177	>	*/
178	>	public void testOffer() {
179		LinkedBlockingQueue q = new LinkedBlockingQueue(1);
180		assertTrue(q.offer(zero));
181		assertFalse(q.offer(one));
182		}
183
184	<	public void testAdd(){
185	<	try {
184	>	/**
185	>	* add succeeds if not full; throws ISE if full
186	>	*/
187	>	public void testAdd() {
188	>	try {
189		LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
190		for (int i = 0; i < SIZE; ++i) {
191		assertTrue(q.add(new Integer(i)));
192		}
193		assertEquals(0, q.remainingCapacity());
194		q.add(new Integer(SIZE));
195	<	} catch (IllegalStateException success){
196	<	}
195	>	shouldThrow();
196	>	} catch (IllegalStateException success) {}
197		}
198
199	<	public void testAddAll1(){
199	>	/**
200	>	* addAll(null) throws NPE
201	>	*/
202	>	public void testAddAll1() {
203		try {
204		LinkedBlockingQueue q = new LinkedBlockingQueue(1);
205		q.addAll(null);
206	<	fail("Cannot add null collection");
207	<	}
208	<	catch (NullPointerException success) {}
206	>	shouldThrow();
207	>	} catch (NullPointerException success) {}
208	>	}
209	>
210	>	/**
211	>	* addAll(this) throws IAE
212	>	*/
213	>	public void testAddAllSelf() {
214	>	try {
215	>	LinkedBlockingQueue q = populatedQueue(SIZE);
216	>	q.addAll(q);
217	>	shouldThrow();
218	>	} catch (IllegalArgumentException success) {}
219		}
220	<	public void testAddAll2(){
220	>
221	>	/**
222	>	* addAll of a collection with null elements throws NPE
223	>	*/
224	>	public void testAddAll2() {
225		try {
226		LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
227		Integer[] ints = new Integer[SIZE];
228		q.addAll(Arrays.asList(ints));
229	<	fail("Cannot add null elements");
230	<	}
159	<	catch (NullPointerException success) {}
229	>	shouldThrow();
230	>	} catch (NullPointerException success) {}
231		}
232	<	public void testAddAll3(){
232	>
233	>	/**
234	>	* addAll of a collection with any null elements throws NPE after
235	>	* possibly adding some elements
236	>	*/
237	>	public void testAddAll3() {
238		try {
239		LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
240		Integer[] ints = new Integer[SIZE];
241		for (int i = 0; i < SIZE-1; ++i)
242		ints[i] = new Integer(i);
243		q.addAll(Arrays.asList(ints));
244	<	fail("Cannot add null elements");
245	<	}
170	<	catch (NullPointerException success) {}
244	>	shouldThrow();
245	>	} catch (NullPointerException success) {}
246		}
247	<	public void testAddAll4(){
247	>
248	>	/**
249	>	* addAll throws ISE if not enough room
250	>	*/
251	>	public void testAddAll4() {
252		try {
253		LinkedBlockingQueue q = new LinkedBlockingQueue(1);
254		Integer[] ints = new Integer[SIZE];
255		for (int i = 0; i < SIZE; ++i)
256		ints[i] = new Integer(i);
257		q.addAll(Arrays.asList(ints));
258	<	fail("Cannot add with insufficient capacity");
259	<	}
181	<	catch (IllegalStateException success) {}
258	>	shouldThrow();
259	>	} catch (IllegalStateException success) {}
260		}
261	<	public void testAddAll5(){
262	<	try {
263	<	Integer[] empty = new Integer[0];
264	<	Integer[] ints = new Integer[SIZE];
265	<	for (int i = 0; i < SIZE; ++i)
266	<	ints[i] = new Integer(i);
267	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
268	<	assertFalse(q.addAll(Arrays.asList(empty)));
269	<	assertTrue(q.addAll(Arrays.asList(ints)));
270	<	for (int i = 0; i < SIZE; ++i)
271	<	assertEquals(ints[i], q.poll());
272	<	}
273	<	finally {}
261	>
262	>	/**
263	>	* Queue contains all elements, in traversal order, of successful addAll
264	>	*/
265	>	public void testAddAll5() {
266	>	Integer[] empty = new Integer[0];
267	>	Integer[] ints = new Integer[SIZE];
268	>	for (int i = 0; i < SIZE; ++i)
269	>	ints[i] = new Integer(i);
270	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
271	>	assertFalse(q.addAll(Arrays.asList(empty)));
272	>	assertTrue(q.addAll(Arrays.asList(ints)));
273	>	for (int i = 0; i < SIZE; ++i)
274	>	assertEquals(ints[i], q.poll());
275		}
276
277	<	public void testPutNull() {
278	<	try {
277	>	/**
278	>	* put(null) throws NPE
279	>	*/
280	>	public void testPutNull() throws InterruptedException {
281	>	try {
282		LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
283		q.put(null);
284	<	fail("put should throw NPE");
285	<	}
286	<	catch (NullPointerException success){
287	<	}
288	<	catch (InterruptedException ie) {
289	<	fail("Unexpected exception");
290	<	}
291	<	}
292	<
293	<	public void testPut() {
294	<	try {
295	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
296	<	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");
284	>	shouldThrow();
285	>	} catch (NullPointerException success) {}
286	>	}
287	>
288	>	/**
289	>	* all elements successfully put are contained
290	>	*/
291	>	public void testPut() throws InterruptedException {
292	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
293	>	for (int i = 0; i < SIZE; ++i) {
294	>	Integer I = new Integer(i);
295	>	q.put(I);
296	>	assertTrue(q.contains(I));
297		}
298	+	assertEquals(0, q.remainingCapacity());
299		}
300
301	<	public void testBlockingPut(){
302	<	Thread t = new Thread(new Runnable() {
303	<	public void run() {
304	<	int added = 0;
305	<	try {
306	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
307	<	for (int i = 0; i < SIZE; ++i) {
308	<	q.put(new Integer(i));
309	<	++added;
310	<	}
311	<	q.put(new Integer(SIZE));
312	<	threadFail("put should block");
313	<	} catch (InterruptedException ie){
314	<	threadAssertEquals(added, SIZE);
315	<	}
316	<	}});
301	>	/**
302	>	* put blocks interruptibly if full
303	>	*/
304	>	public void testBlockingPut() throws InterruptedException {
305	>	final LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
306	>	Thread t = new Thread(new CheckedRunnable() {
307	>	public void realRun() throws InterruptedException {
308	>	for (int i = 0; i < SIZE; ++i)
309	>	q.put(i);
310	>	assertEquals(SIZE, q.size());
311	>	assertEquals(0, q.remainingCapacity());
312	>	try {
313	>	q.put(99);
314	>	shouldThrow();
315	>	} catch (InterruptedException success) {}
316	>	}});
317	>
318		t.start();
319	<	try {
320	<	Thread.sleep(SHORT_DELAY_MS);
321	<	t.interrupt();
322	<	t.join();
323	<	}
248	<	catch (InterruptedException ie) {
249	<	fail("Unexpected exception");
250	<	}
319	>	delay(SHORT_DELAY_MS);
320	>	t.interrupt();
321	>	t.join();
322	>	assertEquals(SIZE, q.size());
323	>	assertEquals(0, q.remainingCapacity());
324		}
325
326	<	public void testPutWithTake() {
326	>	/**
327	>	* put blocks waiting for take when full
328	>	*/
329	>	public void testPutWithTake() throws InterruptedException {
330	>	final int capacity = 2;
331		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
332	<	Thread t = new Thread(new Runnable() {
333	<	public void run(){
334	<	int added = 0;
335	<	try {
336	<	q.put(new Object());
337	<	++added;
338	<	q.put(new Object());
339	<	++added;
340	<	q.put(new Object());
341	<	++added;
342	<	q.put(new Object());
343	<	++added;
344	<	threadFail("Should block");
345	<	} catch (InterruptedException e){
346	<	threadAssertTrue(added >= 2);
347	<	}
348	<	}
349	<	});
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	<	}
332	>	Thread t = new Thread(new CheckedRunnable() {
333	>	public void realRun() throws InterruptedException {
334	>	for (int i = 0; i < capacity + 1; i++)
335	>	q.put(i);
336	>	try {
337	>	q.put(99);
338	>	shouldThrow();
339	>	} catch (InterruptedException success) {}
340	>	}});
341	>
342	>	t.start();
343	>	delay(SHORT_DELAY_MS);
344	>	assertEquals(q.remainingCapacity(), 0);
345	>	assertEquals(0, q.take());
346	>	delay(SHORT_DELAY_MS);
347	>	t.interrupt();
348	>	t.join();
349	>	assertEquals(q.remainingCapacity(), 0);
350		}
351
352	+	/**
353	+	* timed offer times out if full and elements not taken
354	+	*/
355		public void testTimedOffer() {
356		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
357	<	Thread t = new Thread(new Runnable() {
358	<	public void run(){
359	<	try {
360	<	q.put(new Object());
361	<	q.put(new Object());
362	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
363	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
364	<	threadFail("Should block");
365	<	} catch (InterruptedException success){}
366	<	}
367	<	});
368	<
369	<	try {
370	<	t.start();
371	<	Thread.sleep(SMALL_DELAY_MS);
372	<	t.interrupt();
373	<	t.join();
374	<	} catch (Exception e){
304	<	fail("Unexpected exception");
305	<	}
357	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
358	>	Thread t = newStartedThread(new CheckedRunnable() {
359	>	public void realRun() throws InterruptedException {
360	>	q.put(new Object());
361	>	q.put(new Object());
362	>	long startTime = System.nanoTime();
363	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
364	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
365	>	pleaseInterrupt.countDown();
366	>	try {
367	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
368	>	shouldThrow();
369	>	} catch (InterruptedException success) {}
370	>	}});
371	>
372	>	await(pleaseInterrupt);
373	>	t.interrupt();
374	>	awaitTermination(t);
375		}
376
377	<	public void testTake(){
378	<	try {
379	<	LinkedBlockingQueue q = populatedQueue(SIZE);
380	<	for (int i = 0; i < SIZE; ++i) {
381	<	assertEquals(i, ((Integer)q.take()).intValue());
382	<	}
383	<	} catch (InterruptedException e){
384	<	fail("Unexpected exception");
316	<	}
377	>	/**
378	>	* take retrieves elements in FIFO order
379	>	*/
380	>	public void testTake() throws InterruptedException {
381	>	LinkedBlockingQueue q = populatedQueue(SIZE);
382	>	for (int i = 0; i < SIZE; ++i) {
383	>	assertEquals(i, q.take());
384	>	}
385		}
386
387	<	public void testTakeFromEmpty() {
388	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
389	<	Thread t = new Thread(new Runnable() {
390	<	public void run(){
391	<	try {
392	<	q.take();
393	<	threadFail("Should block");
394	<	} catch (InterruptedException success){ }
387	>	/**
388	>	* Take removes existing elements until empty, then blocks interruptibly
389	>	*/
390	>	public void testBlockingTake() throws InterruptedException {
391	>	final LinkedBlockingQueue q = populatedQueue(SIZE);
392	>	Thread t = new Thread(new CheckedRunnable() {
393	>	public void realRun() throws InterruptedException {
394	>	for (int i = 0; i < SIZE; ++i) {
395	>	assertEquals(i, q.take());
396		}
397	<	});
398	<	try {
399	<	t.start();
400	<	Thread.sleep(SHORT_DELAY_MS);
401	<	t.interrupt();
333	<	t.join();
334	<	} catch (Exception e){
335	<	fail("Unexpected exception");
336	<	}
337	<	}
397	>	try {
398	>	q.take();
399	>	shouldThrow();
400	>	} catch (InterruptedException success) {}
401	>	}});
402
339	–	public void testBlockingTake(){
340	–	Thread t = new Thread(new Runnable() {
341	–	public void run() {
342	–	try {
343	–	LinkedBlockingQueue q = populatedQueue(SIZE);
344	–	for (int i = 0; i < SIZE; ++i) {
345	–	assertEquals(i, ((Integer)q.take()).intValue());
346	–	}
347	–	q.take();
348	–	threadFail("take should block");
349	–	} catch (InterruptedException success){
350	–	}
351	–	}});
403		t.start();
404	<	try {
405	<	Thread.sleep(SHORT_DELAY_MS);
406	<	t.interrupt();
356	<	t.join();
357	<	}
358	<	catch (InterruptedException ie) {
359	<	fail("Unexpected exception");
360	<	}
404	>	delay(SHORT_DELAY_MS);
405	>	t.interrupt();
406	>	t.join();
407		}
408
409	<
410	<	public void testPoll(){
409	>	/**
410	>	* poll succeeds unless empty
411	>	*/
412	>	public void testPoll() {
413		LinkedBlockingQueue q = populatedQueue(SIZE);
414		for (int i = 0; i < SIZE; ++i) {
415	<	assertEquals(i, ((Integer)q.poll()).intValue());
415	>	assertEquals(i, q.poll());
416		}
417	<	assertNull(q.poll());
417	>	assertNull(q.poll());
418		}
419
420	<	public void testTimedPoll0() {
421	<	try {
422	<	LinkedBlockingQueue q = populatedQueue(SIZE);
423	<	for (int i = 0; i < SIZE; ++i) {
424	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
425	<	}
426	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
427	<	} catch (InterruptedException e){
428	<	fail("Unexpected exception");
381	<	}
420	>	/**
421	>	* timed poll with zero timeout succeeds when non-empty, else times out
422	>	*/
423	>	public void testTimedPoll0() throws InterruptedException {
424	>	LinkedBlockingQueue q = populatedQueue(SIZE);
425	>	for (int i = 0; i < SIZE; ++i) {
426	>	assertEquals(i, q.poll(0, MILLISECONDS));
427	>	}
428	>	assertNull(q.poll(0, MILLISECONDS));
429		}
430
431	<	public void testTimedPoll() {
432	<	try {
433	<	LinkedBlockingQueue q = populatedQueue(SIZE);
434	<	for (int i = 0; i < SIZE; ++i) {
435	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
436	<	}
437	<	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");
431	>	/**
432	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
433	>	*/
434	>	public void testTimedPoll() throws InterruptedException {
435	>	LinkedBlockingQueue q = populatedQueue(SIZE);
436	>	for (int i = 0; i < SIZE; ++i) {
437	>	assertEquals(i, q.poll(SHORT_DELAY_MS, MILLISECONDS));
438		}
439	+	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
440		}
441
442	<	public void testTimedPollWithOffer(){
443	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
444	<	Thread t = new Thread(new Runnable() {
445	<	public void run(){
446	<	try {
447	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
448	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
449	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
450	<	threadFail("Should block");
451	<	} catch (InterruptedException success) { }
442	>	/**
443	>	* Interrupted timed poll throws InterruptedException instead of
444	>	* returning timeout status
445	>	*/
446	>	public void testInterruptedTimedPoll() throws InterruptedException {
447	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
448	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
449	>	Thread t = newStartedThread(new CheckedRunnable() {
450	>	public void realRun() throws InterruptedException {
451	>	for (int i = 0; i < SIZE; ++i) {
452	>	long t0 = System.nanoTime();
453	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
454	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
455		}
456	<	});
457	<	try {
458	<	t.start();
459	<	Thread.sleep(SMALL_DELAY_MS);
460	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
461	<	t.interrupt();
462	<	t.join();
463	<	} catch (Exception e){
464	<	fail("Unexpected exception");
465	<	}
466	<	}
467	<
456	>	long t0 = System.nanoTime();
457	>	aboutToWait.countDown();
458	>	try {
459	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
460	>	shouldThrow();
461	>	} catch (InterruptedException success) {
462	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
463	>	}
464	>	}});
465	>
466	>	aboutToWait.await();
467	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
468	>	t.interrupt();
469	>	awaitTermination(t, MEDIUM_DELAY_MS);
470	>	checkEmpty(q);
471	>	}
472
473	<	public void testPeek(){
473	>	/**
474	>	* peek returns next element, or null if empty
475	>	*/
476	>	public void testPeek() {
477		LinkedBlockingQueue q = populatedQueue(SIZE);
478		for (int i = 0; i < SIZE; ++i) {
479	<	assertEquals(i, ((Integer)q.peek()).intValue());
480	<	q.poll();
479	>	assertEquals(i, q.peek());
480	>	assertEquals(i, q.poll());
481		assertTrue(q.peek() == null ||
482	<	i != ((Integer)q.peek()).intValue());
482	>	!q.peek().equals(i));
483		}
484	<	assertNull(q.peek());
484	>	assertNull(q.peek());
485		}
486
487	<	public void testElement(){
487	>	/**
488	>	* element returns next element, or throws NSEE if empty
489	>	*/
490	>	public void testElement() {
491		LinkedBlockingQueue q = populatedQueue(SIZE);
492		for (int i = 0; i < SIZE; ++i) {
493	<	assertEquals(i, ((Integer)q.element()).intValue());
494	<	q.poll();
493	>	assertEquals(i, q.element());
494	>	assertEquals(i, q.poll());
495		}
496		try {
497		q.element();
498	<	fail("no such element");
499	<	}
464	<	catch (NoSuchElementException success) {}
498	>	shouldThrow();
499	>	} catch (NoSuchElementException success) {}
500		}
501
502	<	public void testRemove(){
502	>	/**
503	>	* remove removes next element, or throws NSEE if empty
504	>	*/
505	>	public void testRemove() {
506		LinkedBlockingQueue q = populatedQueue(SIZE);
507		for (int i = 0; i < SIZE; ++i) {
508	<	assertEquals(i, ((Integer)q.remove()).intValue());
508	>	assertEquals(i, q.remove());
509		}
510		try {
511		q.remove();
512	<	fail("remove should throw");
513	<	} catch (NoSuchElementException success){
476	<	}
512	>	shouldThrow();
513	>	} catch (NoSuchElementException success) {}
514		}
515
516	<	public void testRemoveElement(){
516	>	/**
517	>	* remove(x) removes x and returns true if present
518	>	*/
519	>	public void testRemoveElement() {
520		LinkedBlockingQueue q = populatedQueue(SIZE);
521		for (int i = 1; i < SIZE; i+=2) {
522	<	assertTrue(q.remove(new Integer(i)));
522	>	assertTrue(q.contains(i));
523	>	assertTrue(q.remove(i));
524	>	assertFalse(q.contains(i));
525	>	assertTrue(q.contains(i-1));
526		}
527		for (int i = 0; i < SIZE; i+=2) {
528	<	assertTrue(q.remove(new Integer(i)));
529	<	assertFalse(q.remove(new Integer(i+1)));
528	>	assertTrue(q.contains(i));
529	>	assertTrue(q.remove(i));
530	>	assertFalse(q.contains(i));
531	>	assertFalse(q.remove(i+1));
532	>	assertFalse(q.contains(i+1));
533		}
534		assertTrue(q.isEmpty());
535		}
536	<
537	<	public void testContains(){
536	>
537	>	/**
538	>	* An add following remove(x) succeeds
539	>	*/
540	>	public void testRemoveElementAndAdd() throws InterruptedException {
541	>	LinkedBlockingQueue q = new LinkedBlockingQueue();
542	>	assertTrue(q.add(new Integer(1)));
543	>	assertTrue(q.add(new Integer(2)));
544	>	assertTrue(q.remove(new Integer(1)));
545	>	assertTrue(q.remove(new Integer(2)));
546	>	assertTrue(q.add(new Integer(3)));
547	>	assertTrue(q.take() != null);
548	>	}
549	>
550	>	/**
551	>	* contains(x) reports true when elements added but not yet removed
552	>	*/
553	>	public void testContains() {
554		LinkedBlockingQueue q = populatedQueue(SIZE);
555		for (int i = 0; i < SIZE; ++i) {
556		assertTrue(q.contains(new Integer(i)));
#	Line 497 | Line 559 | public class LinkedBlockingQueueTest ext
559		}
560		}
561
562	<	public void testClear(){
562	>	/**
563	>	* clear removes all elements
564	>	*/
565	>	public void testClear() {
566		LinkedBlockingQueue q = populatedQueue(SIZE);
567		q.clear();
568		assertTrue(q.isEmpty());
#	Line 505 | Line 570 | public class LinkedBlockingQueueTest ext
570		assertEquals(SIZE, q.remainingCapacity());
571		q.add(one);
572		assertFalse(q.isEmpty());
573	+	assertTrue(q.contains(one));
574		q.clear();
575		assertTrue(q.isEmpty());
576		}
577
578	<	public void testContainsAll(){
578	>	/**
579	>	* containsAll(c) is true when c contains a subset of elements
580	>	*/
581	>	public void testContainsAll() {
582		LinkedBlockingQueue q = populatedQueue(SIZE);
583		LinkedBlockingQueue p = new LinkedBlockingQueue(SIZE);
584		for (int i = 0; i < SIZE; ++i) {
#	Line 520 | Line 589 | public class LinkedBlockingQueueTest ext
589		assertTrue(p.containsAll(q));
590		}
591
592	<	public void testRetainAll(){
592	>	/**
593	>	* retainAll(c) retains only those elements of c and reports true if changed
594	>	*/
595	>	public void testRetainAll() {
596		LinkedBlockingQueue q = populatedQueue(SIZE);
597		LinkedBlockingQueue p = populatedQueue(SIZE);
598		for (int i = 0; i < SIZE; ++i) {
#	Line 536 | Line 608 | public class LinkedBlockingQueueTest ext
608		}
609		}
610
611	<	public void testRemoveAll(){
611	>	/**
612	>	* removeAll(c) removes only those elements of c and reports true if changed
613	>	*/
614	>	public void testRemoveAll() {
615		for (int i = 1; i < SIZE; ++i) {
616		LinkedBlockingQueue q = populatedQueue(SIZE);
617		LinkedBlockingQueue p = populatedQueue(i);
#	Line 549 | Line 624 | public class LinkedBlockingQueueTest ext
624		}
625		}
626
627	+	/**
628	+	* toArray contains all elements in FIFO order
629	+	*/
630	+	public void testToArray() {
631	+	LinkedBlockingQueue q = populatedQueue(SIZE);
632	+	Object[] o = q.toArray();
633	+	for (int i = 0; i < o.length; i++)
634	+	assertSame(o[i], q.poll());
635	+	}
636
637	<	public void testToArray(){
637	>	/**
638	>	* toArray(a) contains all elements in FIFO order
639	>	*/
640	>	public void testToArray2() throws InterruptedException {
641	>	LinkedBlockingQueue<Integer> q = populatedQueue(SIZE);
642	>	Integer[] ints = new Integer[SIZE];
643	>	Integer[] array = q.toArray(ints);
644	>	assertSame(ints, array);
645	>	for (int i = 0; i < ints.length; i++)
646	>	assertSame(ints[i], q.poll());
647	>	}
648	>
649	>	/**
650	>	* toArray(null) throws NullPointerException
651	>	*/
652	>	public void testToArray_NullArg() {
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(null);
656	>	shouldThrow();
657	>	} catch (NullPointerException success) {}
658		}
659
660	<	public void testIteratorOrdering() {
660	>	/**
661	>	* toArray(incompatible array type) throws ArrayStoreException
662	>	*/
663	>	public void testToArray1_BadArg() {
664	>	LinkedBlockingQueue q = populatedQueue(SIZE);
665	>	try {
666	>	q.toArray(new String[10]);
667	>	shouldThrow();
668	>	} catch (ArrayStoreException success) {}
669	>	}
670
590	–	final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
671
672	<	q.add(one);
672	>	/**
673	>	* iterator iterates through all elements
674	>	*/
675	>	public void testIterator() throws InterruptedException {
676	>	LinkedBlockingQueue q = populatedQueue(SIZE);
677	>	Iterator it = q.iterator();
678	>	while (it.hasNext()) {
679	>	assertEquals(it.next(), q.take());
680	>	}
681	>	}
682	>
683	>	/**
684	>	* iterator.remove removes current element
685	>	*/
686	>	public void testIteratorRemove() {
687	>	final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
688		q.add(two);
689	+	q.add(one);
690		q.add(three);
691
692	<	assertEquals("queue should be full", 0, q.remainingCapacity());
692	>	Iterator it = q.iterator();
693	>	it.next();
694	>	it.remove();
695	>
696	>	it = q.iterator();
697	>	assertSame(it.next(), one);
698	>	assertSame(it.next(), three);
699	>	assertFalse(it.hasNext());
700	>	}
701	>
702
703	+	/**
704	+	* iterator ordering is FIFO
705	+	*/
706	+	public void testIteratorOrdering() {
707	+	final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
708	+	q.add(one);
709	+	q.add(two);
710	+	q.add(three);
711	+	assertEquals(0, q.remainingCapacity());
712		int k = 0;
713		for (Iterator it = q.iterator(); it.hasNext();) {
714	<	int i = ((Integer)(it.next())).intValue();
601	<	assertEquals("items should come out in order", ++k, i);
714	>	assertEquals(++k, it.next());
715		}
716	<
604	<	assertEquals("should go through 3 elements", 3, k);
716	>	assertEquals(3, k);
717		}
718
719	<	public void testWeaklyConsistentIteration () {
720	<
719	>	/**
720	>	* Modifications do not cause iterators to fail
721	>	*/
722	>	public void testWeaklyConsistentIteration() {
723		final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
610	–
724		q.add(one);
725		q.add(two);
726		q.add(three);
727	<
728	<	try {
729	<	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");
727	>	for (Iterator it = q.iterator(); it.hasNext();) {
728	>	q.remove();
729	>	it.next();
730		}
731	<
625	<	assertEquals("queue should be empty again", 0, q.size());
731	>	assertEquals(0, q.size());
732		}
733
734
735	<	public void testToString(){
735	>	/**
736	>	* toString contains toStrings of elements
737	>	*/
738	>	public void testToString() {
739		LinkedBlockingQueue q = populatedQueue(SIZE);
740		String s = q.toString();
741		for (int i = 0; i < SIZE; ++i) {
742		assertTrue(s.indexOf(String.valueOf(i)) >= 0);
743		}
744	<	}
744	>	}
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);
644	–
754		ExecutorService executor = Executors.newFixedThreadPool(2);
755	+	executor.execute(new CheckedRunnable() {
756	+	public void realRun() throws InterruptedException {
757	+	assertFalse(q.offer(three));
758	+	assertTrue(q.offer(three, MEDIUM_DELAY_MS, MILLISECONDS));
759	+	assertEquals(0, q.remainingCapacity());
760	+	}});
761	+
762	+	executor.execute(new CheckedRunnable() {
763	+	public void realRun() throws InterruptedException {
764	+	delay(SMALL_DELAY_MS);
765	+	assertSame(one, q.take());
766	+	}});
767
768	<	executor.execute(new Runnable() {
769	<	public void run() {
770	<	threadAssertFalse(q.offer(three));
771	<	try {
772	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
773	<	threadAssertEquals(0, q.remainingCapacity());
774	<	}
775	<	catch (InterruptedException e) {
776	<	threadFail("should not be interrupted");
777	<	}
778	<	}
779	<	});
768	>	joinPool(executor);
769	>	}
770	>
771	>	/**
772	>	* poll retrieves elements across Executor threads
773	>	*/
774	>	public void testPollInExecutor() {
775	>	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
776	>	ExecutorService executor = Executors.newFixedThreadPool(2);
777	>	executor.execute(new CheckedRunnable() {
778	>	public void realRun() throws InterruptedException {
779	>	assertNull(q.poll());
780	>	assertSame(one, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
781	>	assertTrue(q.isEmpty());
782	>	}});
783	>
784	>	executor.execute(new CheckedRunnable() {
785	>	public void realRun() throws InterruptedException {
786	>	delay(SMALL_DELAY_MS);
787	>	q.put(one);
788	>	}});
789
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	–
790		joinPool(executor);
791	+	}
792	+
793	+	/**
794	+	* A deserialized serialized queue has same elements in same order
795	+	*/
796	+	public void testSerialization() throws Exception {
797	+	LinkedBlockingQueue q = populatedQueue(SIZE);
798
799	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
800	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
801	+	out.writeObject(q);
802	+	out.close();
803	+
804	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
805	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
806	+	LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject();
807	+	assertEquals(q.size(), r.size());
808	+	while (!q.isEmpty())
809	+	assertEquals(q.remove(), r.remove());
810		}
811
812	<	public void testPollInExecutor() {
812	>	/**
813	>	* drainTo(null) throws NPE
814	>	*/
815	>	public void testDrainToNull() {
816	>	LinkedBlockingQueue q = populatedQueue(SIZE);
817	>	try {
818	>	q.drainTo(null);
819	>	shouldThrow();
820	>	} catch (NullPointerException success) {}
821	>	}
822
823	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
823	>	/**
824	>	* drainTo(this) throws IAE
825	>	*/
826	>	public void testDrainToSelf() {
827	>	LinkedBlockingQueue q = populatedQueue(SIZE);
828	>	try {
829	>	q.drainTo(q);
830	>	shouldThrow();
831	>	} catch (IllegalArgumentException success) {}
832	>	}
833
834	<	ExecutorService executor = Executors.newFixedThreadPool(2);
834	>	/**
835	>	* drainTo(c) empties queue into another collection c
836	>	*/
837	>	public void testDrainTo() {
838	>	LinkedBlockingQueue q = populatedQueue(SIZE);
839	>	ArrayList l = new ArrayList();
840	>	q.drainTo(l);
841	>	assertEquals(q.size(), 0);
842	>	assertEquals(l.size(), SIZE);
843	>	for (int i = 0; i < SIZE; ++i)
844	>	assertEquals(l.get(i), new Integer(i));
845	>	q.add(zero);
846	>	q.add(one);
847	>	assertFalse(q.isEmpty());
848	>	assertTrue(q.contains(zero));
849	>	assertTrue(q.contains(one));
850	>	l.clear();
851	>	q.drainTo(l);
852	>	assertEquals(q.size(), 0);
853	>	assertEquals(l.size(), 2);
854	>	for (int i = 0; i < 2; ++i)
855	>	assertEquals(l.get(i), new Integer(i));
856	>	}
857
858	<	executor.execute(new Runnable() {
859	<	public void run() {
860	<	threadAssertNull(q.poll());
861	<	try {
862	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
863	<	threadAssertTrue(q.isEmpty());
864	<	}
865	<	catch (InterruptedException e) {
866	<	threadFail("should not be interrupted");
691	<	}
692	<	}
693	<	});
858	>	/**
859	>	* drainTo empties full queue, unblocking a waiting put.
860	>	*/
861	>	public void testDrainToWithActivePut() throws InterruptedException {
862	>	final LinkedBlockingQueue q = populatedQueue(SIZE);
863	>	Thread t = new Thread(new CheckedRunnable() {
864	>	public void realRun() throws InterruptedException {
865	>	q.put(new Integer(SIZE+1));
866	>	}});
867
868	<	executor.execute(new Runnable() {
869	<	public void run() {
870	<	try {
871	<	Thread.sleep(SMALL_DELAY_MS);
872	<	q.put(one);
873	<	}
874	<	catch (InterruptedException e) {
875	<	threadFail("should not be interrupted");
703	<	}
704	<	}
705	<	});
706	<
707	<	joinPool(executor);
868	>	t.start();
869	>	ArrayList l = new ArrayList();
870	>	q.drainTo(l);
871	>	assertTrue(l.size() >= SIZE);
872	>	for (int i = 0; i < SIZE; ++i)
873	>	assertEquals(l.get(i), new Integer(i));
874	>	t.join();
875	>	assertTrue(q.size() + l.size() >= SIZE);
876		}
877
878	<	public void testSerialization() {
878	>	/**
879	>	* drainTo(null, n) throws NPE
880	>	*/
881	>	public void testDrainToNullN() {
882		LinkedBlockingQueue q = populatedQueue(SIZE);
883	+	try {
884	+	q.drainTo(null, 0);
885	+	shouldThrow();
886	+	} catch (NullPointerException success) {}
887	+	}
888
889	+	/**
890	+	* drainTo(this, n) throws IAE
891	+	*/
892	+	public void testDrainToSelfN() {
893	+	LinkedBlockingQueue q = populatedQueue(SIZE);
894		try {
895	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
896	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
897	<	out.writeObject(q);
898	<	out.close();
899	<
900	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
901	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
902	<	LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject();
903	<	assertEquals(q.size(), r.size());
904	<	while (!q.isEmpty())
905	<	assertEquals(q.remove(), r.remove());
906	<	} catch(Exception e){
907	<	e.printStackTrace();
908	<	fail("unexpected exception");
895	>	q.drainTo(q, 0);
896	>	shouldThrow();
897	>	} catch (IllegalArgumentException success) {}
898	>	}
899	>
900	>	/**
901	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
902	>	*/
903	>	public void testDrainToN() {
904	>	LinkedBlockingQueue q = new LinkedBlockingQueue();
905	>	for (int i = 0; i < SIZE + 2; ++i) {
906	>	for (int j = 0; j < SIZE; j++)
907	>	assertTrue(q.offer(new Integer(j)));
908	>	ArrayList l = new ArrayList();
909	>	q.drainTo(l, i);
910	>	int k = (i < SIZE) ? i : SIZE;
911	>	assertEquals(l.size(), k);
912	>	assertEquals(q.size(), SIZE-k);
913	>	for (int j = 0; j < k; ++j)
914	>	assertEquals(l.get(j), new Integer(j));
915	>	while (q.poll() != null) ;
916		}
917		}
918

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