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Comparing jsr166/src/test/tck/LinkedBlockingQueueTest.java (file contents):
Revision 1.5 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.44 by jsr166, Fri May 27 20:07:24 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
23	–
39		/**
40		* Create a queue of given size containing consecutive
41		* Integers 0 ... n.
42		*/
43	<	private LinkedBlockingQueue populatedQueue(int n) {
44	<	LinkedBlockingQueue q = new LinkedBlockingQueue(n);
43	>	private LinkedBlockingQueue<Integer> populatedQueue(int n) {
44	>	LinkedBlockingQueue<Integer> q =
45	>	new LinkedBlockingQueue<Integer>(n);
46		assertTrue(q.isEmpty());
47	<	for(int i = 0; i < n; i++)
48	<	assertTrue(q.offer(new Integer(i)));
47	>	for (int i = 0; i < n; i++)
48	>	assertTrue(q.offer(new Integer(i)));
49		assertFalse(q.isEmpty());
50		assertEquals(0, q.remainingCapacity());
51	<	assertEquals(n, q.size());
51	>	assertEquals(n, q.size());
52		return q;
53		}
54	<
54	>
55		/**
56		* A new queue has the indicated capacity, or Integer.MAX_VALUE if
57		* none given
#	Line 46 | Line 62 | public class LinkedBlockingQueueTest ext
62		}
63
64		/**
65	<	* Constructor throws IAE if  capacity argument nonpositive
65	>	* Constructor throws IAE if capacity argument nonpositive
66		*/
67		public void testConstructor2() {
68		try {
69		LinkedBlockingQueue q = new LinkedBlockingQueue(0);
70		shouldThrow();
71	<	}
56	<	catch (IllegalArgumentException success) {}
71	>	} catch (IllegalArgumentException success) {}
72		}
73
74		/**
#	Line 63 | Line 78 | public class LinkedBlockingQueueTest ext
78		try {
79		LinkedBlockingQueue q = new LinkedBlockingQueue(null);
80		shouldThrow();
81	<	}
67	<	catch (NullPointerException success) {}
81	>	} catch (NullPointerException success) {}
82		}
83
84		/**
#	Line 75 | Line 89 | public class LinkedBlockingQueueTest ext
89		Integer[] ints = new Integer[SIZE];
90		LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
91		shouldThrow();
92	<	}
79	<	catch (NullPointerException success) {}
92	>	} catch (NullPointerException success) {}
93		}
94
95		/**
#	Line 89 | Line 102 | public class LinkedBlockingQueueTest ext
102		ints[i] = new Integer(i);
103		LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
104		shouldThrow();
105	<	}
93	<	catch (NullPointerException success) {}
105	>	} catch (NullPointerException success) {}
106		}
107
108		/**
109		* Queue contains all elements of collection used to initialize
110		*/
111		public void testConstructor6() {
112	<	try {
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)
106	<	assertEquals(ints[i], q.poll());
107	<	}
108	<	finally {}
112	>	Integer[] ints = new Integer[SIZE];
113	>	for (int i = 0; i < SIZE; ++i)
114	>	ints[i] = new Integer(i);
115	>	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
116	>	for (int i = 0; i < SIZE; ++i)
117	>	assertEquals(ints[i], q.poll());
118		}
119
120		/**
#	Line 144 | Line 153 | public class LinkedBlockingQueueTest ext
153		* offer(null) throws NPE
154		*/
155		public void testOfferNull() {
156	<	try {
156	>	try {
157		LinkedBlockingQueue q = new LinkedBlockingQueue(1);
158		q.offer(null);
159		shouldThrow();
160	<	} catch (NullPointerException success) { }
160	>	} catch (NullPointerException success) {}
161	>	}
162	>
163	>	/**
164	>	* add(null) throws NPE
165	>	*/
166	>	public void testAddNull() {
167	>	try {
168	>	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
169	>	q.add(null);
170	>	shouldThrow();
171	>	} catch (NullPointerException success) {}
172		}
173
174		/**
#	Line 164 | Line 184 | public class LinkedBlockingQueueTest ext
184		* add succeeds if not full; throws ISE if full
185		*/
186		public void testAdd() {
187	<	try {
187	>	try {
188		LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
189		for (int i = 0; i < SIZE; ++i) {
190		assertTrue(q.add(new Integer(i)));
191		}
192		assertEquals(0, q.remainingCapacity());
193		q.add(new Integer(SIZE));
194	<	} catch (IllegalStateException success){
195	<	}
194	>	shouldThrow();
195	>	} catch (IllegalStateException success) {}
196		}
197
198		/**
#	Line 183 | Line 203 | public class LinkedBlockingQueueTest ext
203		LinkedBlockingQueue q = new LinkedBlockingQueue(1);
204		q.addAll(null);
205		shouldThrow();
206	<	}
207	<	catch (NullPointerException success) {}
206	>	} catch (NullPointerException success) {}
207	>	}
208	>
209	>	/**
210	>	* addAll(this) throws IAE
211	>	*/
212	>	public void testAddAllSelf() {
213	>	try {
214	>	LinkedBlockingQueue q = populatedQueue(SIZE);
215	>	q.addAll(q);
216	>	shouldThrow();
217	>	} catch (IllegalArgumentException success) {}
218		}
219	+
220		/**
221		* addAll of a collection with null elements throws NPE
222		*/
#	Line 195 | Line 226 | public class LinkedBlockingQueueTest ext
226		Integer[] ints = new Integer[SIZE];
227		q.addAll(Arrays.asList(ints));
228		shouldThrow();
229	<	}
199	<	catch (NullPointerException success) {}
229	>	} catch (NullPointerException success) {}
230		}
231	+
232		/**
233		* addAll of a collection with any null elements throws NPE after
234		* possibly adding some elements
#	Line 210 | Line 241 | public class LinkedBlockingQueueTest ext
241		ints[i] = new Integer(i);
242		q.addAll(Arrays.asList(ints));
243		shouldThrow();
244	<	}
214	<	catch (NullPointerException success) {}
244	>	} catch (NullPointerException success) {}
245		}
246	+
247		/**
248		* addAll throws ISE if not enough room
249		*/
#	Line 224 | Line 255 | public class LinkedBlockingQueueTest ext
255		ints[i] = new Integer(i);
256		q.addAll(Arrays.asList(ints));
257		shouldThrow();
258	<	}
228	<	catch (IllegalStateException success) {}
258	>	} catch (IllegalStateException success) {}
259		}
260	+
261		/**
262		* Queue contains all elements, in traversal order, of successful addAll
263		*/
264		public void testAddAll5() {
265	<	try {
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)
243	<	assertEquals(ints[i], q.poll());
244	<	}
245	<	finally {}
265	>	Integer[] empty = new Integer[0];
266	>	Integer[] ints = new Integer[SIZE];
267	>	for (int i = 0; i < SIZE; ++i)
268	>	ints[i] = new Integer(i);
269	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
270	>	assertFalse(q.addAll(Arrays.asList(empty)));
271	>	assertTrue(q.addAll(Arrays.asList(ints)));
272	>	for (int i = 0; i < SIZE; ++i)
273	>	assertEquals(ints[i], q.poll());
274		}
275
276		/**
277		* put(null) throws NPE
278		*/
279	<	public void testPutNull() {
280	<	try {
279	>	public void testPutNull() throws InterruptedException {
280	>	try {
281		LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
282		q.put(null);
283		shouldThrow();
284	<	}
285	<	catch (NullPointerException success){
258	<	}
259	<	catch (InterruptedException ie) {
260	<	unexpectedException();
261	<	}
262	<	}
284	>	} catch (NullPointerException success) {}
285	>	}
286
287		/**
288		* all elements successfully put are contained
289		*/
290	<	public void testPut() {
291	<	try {
292	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
293	<	for (int i = 0; i < SIZE; ++i) {
294	<	Integer I = new Integer(i);
295	<	q.put(I);
273	<	assertTrue(q.contains(I));
274	<	}
275	<	assertEquals(0, q.remainingCapacity());
276	<	}
277	<	catch (InterruptedException ie) {
278	<	unexpectedException();
290	>	public void testPut() throws InterruptedException {
291	>	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
292	>	for (int i = 0; i < SIZE; ++i) {
293	>	Integer I = new Integer(i);
294	>	q.put(I);
295	>	assertTrue(q.contains(I));
296		}
297	+	assertEquals(0, q.remainingCapacity());
298		}
299
300		/**
301		* put blocks interruptibly if full
302		*/
303	<	public void testBlockingPut() {
304	<	Thread t = new Thread(new Runnable() {
305	<	public void run() {
306	<	int added = 0;
307	<	try {
308	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
309	<	for (int i = 0; i < SIZE; ++i) {
310	<	q.put(new Integer(i));
311	<	++added;
312	<	}
313	<	q.put(new Integer(SIZE));
314	<	threadShouldThrow();
315	<	} catch (InterruptedException ie){
316	<	threadAssertEquals(added, SIZE);
317	<	}
318	<	}});
319	<	t.start();
320	<	try {
321	<	Thread.sleep(SHORT_DELAY_MS);
322	<	t.interrupt();
323	<	t.join();
324	<	}
325	<	catch (InterruptedException ie) {
326	<	unexpectedException();
327	<	}
303	>	public void testBlockingPut() throws InterruptedException {
304	>	final LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
305	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
306	>	Thread t = newStartedThread(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	>
313	>	Thread.currentThread().interrupt();
314	>	try {
315	>	q.put(99);
316	>	shouldThrow();
317	>	} catch (InterruptedException success) {}
318	>	assertFalse(Thread.interrupted());
319	>
320	>	pleaseInterrupt.countDown();
321	>	try {
322	>	q.put(99);
323	>	shouldThrow();
324	>	} catch (InterruptedException success) {}
325	>	assertFalse(Thread.interrupted());
326	>	}});
327	>
328	>	await(pleaseInterrupt);
329	>	assertThreadStaysAlive(t);
330	>	t.interrupt();
331	>	awaitTermination(t);
332	>	assertEquals(SIZE, q.size());
333	>	assertEquals(0, q.remainingCapacity());
334		}
335
336		/**
337	<	* put blocks waiting for take when full
337	>	* put blocks interruptibly waiting for take when full
338		*/
339	<	public void testPutWithTake() {
339	>	public void testPutWithTake() throws InterruptedException {
340	>	final int capacity = 2;
341		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
342	<	Thread t = new Thread(new Runnable() {
343	<	public void run() {
344	<	int added = 0;
345	<	try {
346	<	q.put(new Object());
347	<	++added;
348	<	q.put(new Object());
349	<	++added;
350	<	q.put(new Object());
351	<	++added;
352	<	q.put(new Object());
353	<	++added;
354	<	threadShouldThrow();
355	<	} catch (InterruptedException e){
356	<	threadAssertTrue(added >= 2);
357	<	}
358	<	}
359	<	});
360	<	try {
361	<	t.start();
362	<	Thread.sleep(SHORT_DELAY_MS);
363	<	q.take();
364	<	t.interrupt();
365	<	t.join();
366	<	} catch (Exception e){
367	<	unexpectedException();
343	<	}
342	>	final CountDownLatch pleaseTake = new CountDownLatch(1);
343	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
344	>	Thread t = newStartedThread(new CheckedRunnable() {
345	>	public void realRun() throws InterruptedException {
346	>	for (int i = 0; i < capacity; i++)
347	>	q.put(i);
348	>	pleaseTake.countDown();
349	>	q.put(86);
350	>
351	>	pleaseInterrupt.countDown();
352	>	try {
353	>	q.put(99);
354	>	shouldThrow();
355	>	} catch (InterruptedException success) {}
356	>	assertFalse(Thread.interrupted());
357	>	}});
358	>
359	>	await(pleaseTake);
360	>	assertEquals(q.remainingCapacity(), 0);
361	>	assertEquals(0, q.take());
362	>
363	>	await(pleaseInterrupt);
364	>	assertThreadStaysAlive(t);
365	>	t.interrupt();
366	>	awaitTermination(t);
367	>	assertEquals(q.remainingCapacity(), 0);
368		}
369
370		/**
#	Line 348 | Line 372 | public class LinkedBlockingQueueTest ext
372		*/
373		public void testTimedOffer() {
374		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
375	<	Thread t = new Thread(new Runnable() {
376	<	public void run() {
377	<	try {
378	<	q.put(new Object());
379	<	q.put(new Object());
380	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
381	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
382	<	threadShouldThrow();
383	<	} catch (InterruptedException success){}
384	<	}
385	<	});
386	<
387	<	try {
388	<	t.start();
389	<	Thread.sleep(SMALL_DELAY_MS);
390	<	t.interrupt();
391	<	t.join();
392	<	} catch (Exception e){
393	<	unexpectedException();
370	<	}
375	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
376	>	Thread t = newStartedThread(new CheckedRunnable() {
377	>	public void realRun() throws InterruptedException {
378	>	q.put(new Object());
379	>	q.put(new Object());
380	>	long startTime = System.nanoTime();
381	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
382	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
383	>	pleaseInterrupt.countDown();
384	>	try {
385	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
386	>	shouldThrow();
387	>	} catch (InterruptedException success) {}
388	>	}});
389	>
390	>	await(pleaseInterrupt);
391	>	assertThreadStaysAlive(t);
392	>	t.interrupt();
393	>	awaitTermination(t);
394		}
395
396		/**
397		* take retrieves elements in FIFO order
398		*/
399	<	public void testTake() {
400	<	try {
401	<	LinkedBlockingQueue q = populatedQueue(SIZE);
402	<	for (int i = 0; i < SIZE; ++i) {
380	<	assertEquals(i, ((Integer)q.take()).intValue());
381	<	}
382	<	} catch (InterruptedException e){
383	<	unexpectedException();
384	<	}
385	<	}
386	<
387	<	/**
388	<	* take blocks interruptibly when empty
389	<	*/
390	<	public void testTakeFromEmpty() {
391	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
392	<	Thread t = new Thread(new Runnable() {
393	<	public void run() {
394	<	try {
395	<	q.take();
396	<	threadShouldThrow();
397	<	} catch (InterruptedException success){ }
398	<	}
399	<	});
400	<	try {
401	<	t.start();
402	<	Thread.sleep(SHORT_DELAY_MS);
403	<	t.interrupt();
404	<	t.join();
405	<	} catch (Exception e){
406	<	unexpectedException();
399	>	public void testTake() throws InterruptedException {
400	>	LinkedBlockingQueue q = populatedQueue(SIZE);
401	>	for (int i = 0; i < SIZE; ++i) {
402	>	assertEquals(i, q.take());
403		}
404		}
405
406		/**
407		* Take removes existing elements until empty, then blocks interruptibly
408		*/
409	<	public void testBlockingTake() {
410	<	Thread t = new Thread(new Runnable() {
411	<	public void run() {
412	<	try {
413	<	LinkedBlockingQueue q = populatedQueue(SIZE);
414	<	for (int i = 0; i < SIZE; ++i) {
415	<	assertEquals(i, ((Integer)q.take()).intValue());
416	<	}
417	<	q.take();
418	<	threadShouldThrow();
419	<	} catch (InterruptedException success){
420	<	}
421	<	}});
422	<	t.start();
423	<	try {
428	<	Thread.sleep(SHORT_DELAY_MS);
429	<	t.interrupt();
430	<	t.join();
431	<	}
432	<	catch (InterruptedException ie) {
433	<	unexpectedException();
434	<	}
435	<	}
409	>	public void testBlockingTake() throws InterruptedException {
410	>	final BlockingQueue q = populatedQueue(SIZE);
411	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
412	>	Thread t = newStartedThread(new CheckedRunnable() {
413	>	public void realRun() throws InterruptedException {
414	>	for (int i = 0; i < SIZE; ++i) {
415	>	assertEquals(i, q.take());
416	>	}
417	>
418	>	Thread.currentThread().interrupt();
419	>	try {
420	>	q.take();
421	>	shouldThrow();
422	>	} catch (InterruptedException success) {}
423	>	assertFalse(Thread.interrupted());
424
425	+	pleaseInterrupt.countDown();
426	+	try {
427	+	q.take();
428	+	shouldThrow();
429	+	} catch (InterruptedException success) {}
430	+	assertFalse(Thread.interrupted());
431	+	}});
432	+
433	+	await(pleaseInterrupt);
434	+	assertThreadStaysAlive(t);
435	+	t.interrupt();
436	+	awaitTermination(t);
437	+	}
438
439		/**
440		* poll succeeds unless empty
#	Line 441 | Line 442 | public class LinkedBlockingQueueTest ext
442		public void testPoll() {
443		LinkedBlockingQueue q = populatedQueue(SIZE);
444		for (int i = 0; i < SIZE; ++i) {
445	<	assertEquals(i, ((Integer)q.poll()).intValue());
445	>	assertEquals(i, q.poll());
446		}
447	<	assertNull(q.poll());
447	>	assertNull(q.poll());
448		}
449
450		/**
451	<	* timed pool with zero timeout succeeds when non-empty, else times out
451	>	* timed poll with zero timeout succeeds when non-empty, else times out
452		*/
453	<	public void testTimedPoll0() {
454	<	try {
455	<	LinkedBlockingQueue q = populatedQueue(SIZE);
456	<	for (int i = 0; i < SIZE; ++i) {
457	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
458	<	}
458	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
459	<	} catch (InterruptedException e){
460	<	unexpectedException();
461	<	}
453	>	public void testTimedPoll0() throws InterruptedException {
454	>	LinkedBlockingQueue q = populatedQueue(SIZE);
455	>	for (int i = 0; i < SIZE; ++i) {
456	>	assertEquals(i, q.poll(0, MILLISECONDS));
457	>	}
458	>	assertNull(q.poll(0, MILLISECONDS));
459		}
460
461		/**
462	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
462	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
463		*/
464	<	public void testTimedPoll() {
465	<	try {
466	<	LinkedBlockingQueue q = populatedQueue(SIZE);
467	<	for (int i = 0; i < SIZE; ++i) {
468	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
469	<	}
470	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
471	<	} catch (InterruptedException e){
472	<	unexpectedException();
473	<	}
464	>	public void testTimedPoll() throws InterruptedException {
465	>	LinkedBlockingQueue<Integer> q = populatedQueue(SIZE);
466	>	for (int i = 0; i < SIZE; ++i) {
467	>	long startTime = System.nanoTime();
468	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
469	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
470	>	}
471	>	long startTime = System.nanoTime();
472	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
473	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
474	>	checkEmpty(q);
475		}
476
477		/**
478		* Interrupted timed poll throws InterruptedException instead of
479		* returning timeout status
480		*/
481	<	public void testInterruptedTimedPoll() {
482	<	Thread t = new Thread(new Runnable() {
483	<	public void run() {
484	<	try {
485	<	LinkedBlockingQueue q = populatedQueue(SIZE);
486	<	for (int i = 0; i < SIZE; ++i) {
487	<	threadAssertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
488	<	}
489	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
492	<	} catch (InterruptedException success){
493	<	}
494	<	}});
495	<	t.start();
496	<	try {
497	<	Thread.sleep(SHORT_DELAY_MS);
498	<	t.interrupt();
499	<	t.join();
500	<	}
501	<	catch (InterruptedException ie) {
502	<	unexpectedException();
503	<	}
504	<	}
505	<
506	<	/**
507	<	*  timed poll before a delayed offer fails; after offer succeeds;
508	<	*  on interruption throws
509	<	*/
510	<	public void testTimedPollWithOffer() {
511	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
512	<	Thread t = new Thread(new Runnable() {
513	<	public void run() {
514	<	try {
515	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
516	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
517	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
518	<	threadShouldThrow();
519	<	} catch (InterruptedException success) { }
481	>	public void testInterruptedTimedPoll() throws InterruptedException {
482	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
483	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
484	>	Thread t = newStartedThread(new CheckedRunnable() {
485	>	public void realRun() throws InterruptedException {
486	>	for (int i = 0; i < SIZE; ++i) {
487	>	long t0 = System.nanoTime();
488	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
489	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
490		}
491	<	});
492	<	try {
493	<	t.start();
494	<	Thread.sleep(SMALL_DELAY_MS);
495	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
496	<	t.interrupt();
497	<	t.join();
498	<	} catch (Exception e){
499	<	unexpectedException();
500	<	}
501	<	}
491	>	long t0 = System.nanoTime();
492	>	aboutToWait.countDown();
493	>	try {
494	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
495	>	shouldThrow();
496	>	} catch (InterruptedException success) {
497	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
498	>	}
499	>	}});
500	>
501	>	aboutToWait.await();
502	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
503	>	t.interrupt();
504	>	awaitTermination(t, MEDIUM_DELAY_MS);
505	>	checkEmpty(q);
506	>	}
507
508		/**
509		* peek returns next element, or null if empty
#	Line 536 | Line 511 | public class LinkedBlockingQueueTest ext
511		public void testPeek() {
512		LinkedBlockingQueue q = populatedQueue(SIZE);
513		for (int i = 0; i < SIZE; ++i) {
514	<	assertEquals(i, ((Integer)q.peek()).intValue());
515	<	q.poll();
514	>	assertEquals(i, q.peek());
515	>	assertEquals(i, q.poll());
516		assertTrue(q.peek() == null ||
517	<	i != ((Integer)q.peek()).intValue());
517	>	!q.peek().equals(i));
518		}
519	<	assertNull(q.peek());
519	>	assertNull(q.peek());
520		}
521
522		/**
#	Line 550 | Line 525 | public class LinkedBlockingQueueTest ext
525		public void testElement() {
526		LinkedBlockingQueue q = populatedQueue(SIZE);
527		for (int i = 0; i < SIZE; ++i) {
528	<	assertEquals(i, ((Integer)q.element()).intValue());
529	<	q.poll();
528	>	assertEquals(i, q.element());
529	>	assertEquals(i, q.poll());
530		}
531		try {
532		q.element();
533		shouldThrow();
534	<	}
560	<	catch (NoSuchElementException success) {}
534	>	} catch (NoSuchElementException success) {}
535		}
536
537		/**
#	Line 566 | Line 540 | public class LinkedBlockingQueueTest ext
540		public void testRemove() {
541		LinkedBlockingQueue q = populatedQueue(SIZE);
542		for (int i = 0; i < SIZE; ++i) {
543	<	assertEquals(i, ((Integer)q.remove()).intValue());
543	>	assertEquals(i, q.remove());
544		}
545		try {
546		q.remove();
547		shouldThrow();
548	<	} catch (NoSuchElementException success){
575	<	}
548	>	} catch (NoSuchElementException success) {}
549		}
550
551		/**
#	Line 581 | Line 554 | public class LinkedBlockingQueueTest ext
554		public void testRemoveElement() {
555		LinkedBlockingQueue q = populatedQueue(SIZE);
556		for (int i = 1; i < SIZE; i+=2) {
557	<	assertTrue(q.remove(new Integer(i)));
557	>	assertTrue(q.contains(i));
558	>	assertTrue(q.remove(i));
559	>	assertFalse(q.contains(i));
560	>	assertTrue(q.contains(i-1));
561		}
562		for (int i = 0; i < SIZE; i+=2) {
563	<	assertTrue(q.remove(new Integer(i)));
564	<	assertFalse(q.remove(new Integer(i+1)));
563	>	assertTrue(q.contains(i));
564	>	assertTrue(q.remove(i));
565	>	assertFalse(q.contains(i));
566	>	assertFalse(q.remove(i+1));
567	>	assertFalse(q.contains(i+1));
568		}
569		assertTrue(q.isEmpty());
570		}
571	<
571	>
572	>	/**
573	>	* An add following remove(x) succeeds
574	>	*/
575	>	public void testRemoveElementAndAdd() throws InterruptedException {
576	>	LinkedBlockingQueue q = new LinkedBlockingQueue();
577	>	assertTrue(q.add(new Integer(1)));
578	>	assertTrue(q.add(new Integer(2)));
579	>	assertTrue(q.remove(new Integer(1)));
580	>	assertTrue(q.remove(new Integer(2)));
581	>	assertTrue(q.add(new Integer(3)));
582	>	assertTrue(q.take() != null);
583	>	}
584	>
585		/**
586		* contains(x) reports true when elements added but not yet removed
587		*/
#	Line 613 | Line 605 | public class LinkedBlockingQueueTest ext
605		assertEquals(SIZE, q.remainingCapacity());
606		q.add(one);
607		assertFalse(q.isEmpty());
608	+	assertTrue(q.contains(one));
609		q.clear();
610		assertTrue(q.isEmpty());
611		}
#	Line 667 | Line 660 | public class LinkedBlockingQueueTest ext
660		}
661
662		/**
663	<	* toArray contains all elements
663	>	* toArray contains all elements in FIFO order
664		*/
665		public void testToArray() {
666		LinkedBlockingQueue q = populatedQueue(SIZE);
667	<	Object[] o = q.toArray();
668	<	try {
669	<	for(int i = 0; i < o.length; i++)
670	<	assertEquals(o[i], q.take());
671	<	} catch (InterruptedException e){
672	<	unexpectedException();
673	<	}
667	>	Object[] o = q.toArray();
668	>	for (int i = 0; i < o.length; i++)
669	>	assertSame(o[i], q.poll());
670	>	}
671	>
672	>	/**
673	>	* toArray(a) contains all elements in FIFO order
674	>	*/
675	>	public void testToArray2() throws InterruptedException {
676	>	LinkedBlockingQueue<Integer> q = populatedQueue(SIZE);
677	>	Integer[] ints = new Integer[SIZE];
678	>	Integer[] array = q.toArray(ints);
679	>	assertSame(ints, array);
680	>	for (int i = 0; i < ints.length; i++)
681	>	assertSame(ints[i], q.poll());
682	>	}
683	>
684	>	/**
685	>	* toArray(null) throws NullPointerException
686	>	*/
687	>	public void testToArray_NullArg() {
688	>	LinkedBlockingQueue q = populatedQueue(SIZE);
689	>	try {
690	>	q.toArray(null);
691	>	shouldThrow();
692	>	} catch (NullPointerException success) {}
693		}
694
695		/**
696	<	* toArray(a) contains all elements
697	<	*/
698	<	public void testToArray2() {
699	<	LinkedBlockingQueue q = populatedQueue(SIZE);
700	<	Integer[] ints = new Integer[SIZE];
701	<	ints = (Integer[])q.toArray(ints);
702	<	try {
703	<	for(int i = 0; i < ints.length; i++)
692	<	assertEquals(ints[i], q.take());
693	<	} catch (InterruptedException e){
694	<	unexpectedException();
695	<	}
696	>	* toArray(incompatible array type) throws ArrayStoreException
697	>	*/
698	>	public void testToArray1_BadArg() {
699	>	LinkedBlockingQueue q = populatedQueue(SIZE);
700	>	try {
701	>	q.toArray(new String[10]);
702	>	shouldThrow();
703	>	} catch (ArrayStoreException success) {}
704		}
705	<
705	>
706		/**
707		* iterator iterates through all elements
708		*/
709	<	public void testIterator() {
709	>	public void testIterator() throws InterruptedException {
710		LinkedBlockingQueue q = populatedQueue(SIZE);
711	<	Iterator it = q.iterator();
712	<	try {
713	<	while(it.hasNext()){
714	<	assertEquals(it.next(), q.take());
707	<	}
708	<	} catch (InterruptedException e){
709	<	unexpectedException();
710	<	}
711	>	Iterator it = q.iterator();
712	>	while (it.hasNext()) {
713	>	assertEquals(it.next(), q.take());
714	>	}
715		}
716
717		/**
718		* iterator.remove removes current element
719		*/
720	<	public void testIteratorRemove () {
720	>	public void testIteratorRemove() {
721		final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
722		q.add(two);
723		q.add(one);
#	Line 722 | Line 726 | public class LinkedBlockingQueueTest ext
726		Iterator it = q.iterator();
727		it.next();
728		it.remove();
729	<
729	>
730		it = q.iterator();
731	<	assertEquals(it.next(), one);
732	<	assertEquals(it.next(), three);
731	>	assertSame(it.next(), one);
732	>	assertSame(it.next(), three);
733		assertFalse(it.hasNext());
734		}
735
732	–
736		/**
737		* iterator ordering is FIFO
738		*/
#	Line 741 | Line 744 | public class LinkedBlockingQueueTest ext
744		assertEquals(0, q.remainingCapacity());
745		int k = 0;
746		for (Iterator it = q.iterator(); it.hasNext();) {
747	<	int i = ((Integer)(it.next())).intValue();
745	<	assertEquals(++k, i);
747	>	assertEquals(++k, it.next());
748		}
749		assertEquals(3, k);
750		}
#	Line 750 | Line 752 | public class LinkedBlockingQueueTest ext
752		/**
753		* Modifications do not cause iterators to fail
754		*/
755	<	public void testWeaklyConsistentIteration () {
755	>	public void testWeaklyConsistentIteration() {
756		final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
757		q.add(one);
758		q.add(two);
759		q.add(three);
760	<	try {
761	<	for (Iterator it = q.iterator(); it.hasNext();) {
762	<	q.remove();
761	<	it.next();
762	<	}
763	<	}
764	<	catch (ConcurrentModificationException e) {
765	<	unexpectedException();
760	>	for (Iterator it = q.iterator(); it.hasNext();) {
761	>	q.remove();
762	>	it.next();
763		}
764		assertEquals(0, q.size());
765		}
766
770	–
767		/**
768		* toString contains toStrings of elements
769		*/
#	Line 775 | Line 771 | public class LinkedBlockingQueueTest ext
771		LinkedBlockingQueue q = populatedQueue(SIZE);
772		String s = q.toString();
773		for (int i = 0; i < SIZE; ++i) {
774	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
774	>	assertTrue(s.contains(String.valueOf(i)));
775		}
776	<	}
781	<
776	>	}
777
778		/**
779		* offer transfers elements across Executor tasks
#	Line 788 | Line 783 | public class LinkedBlockingQueueTest ext
783		q.add(one);
784		q.add(two);
785		ExecutorService executor = Executors.newFixedThreadPool(2);
786	<	executor.execute(new Runnable() {
787	<	public void run() {
788	<	threadAssertFalse(q.offer(three));
789	<	try {
790	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
791	<	threadAssertEquals(0, q.remainingCapacity());
792	<	}
793	<	catch (InterruptedException e) {
794	<	threadUnexpectedException();
795	<	}
796	<	}
797	<	});
786	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
787	>	executor.execute(new CheckedRunnable() {
788	>	public void realRun() throws InterruptedException {
789	>	assertFalse(q.offer(three));
790	>	threadsStarted.await();
791	>	assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS));
792	>	assertEquals(0, q.remainingCapacity());
793	>	}});
794	>
795	>	executor.execute(new CheckedRunnable() {
796	>	public void realRun() throws InterruptedException {
797	>	threadsStarted.await();
798	>	assertSame(one, q.take());
799	>	}});
800
804	–	executor.execute(new Runnable() {
805	–	public void run() {
806	–	try {
807	–	Thread.sleep(SMALL_DELAY_MS);
808	–	threadAssertEquals(one, q.take());
809	–	}
810	–	catch (InterruptedException e) {
811	–	threadUnexpectedException();
812	–	}
813	–	}
814	–	});
815	–
801		joinPool(executor);
802		}
803
804		/**
805	<	* poll retrieves elements across Executor threads
805	>	* timed poll retrieves elements across Executor threads
806		*/
807		public void testPollInExecutor() {
808		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
809	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
810		ExecutorService executor = Executors.newFixedThreadPool(2);
811	<	executor.execute(new Runnable() {
812	<	public void run() {
813	<	threadAssertNull(q.poll());
814	<	try {
815	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
816	<	threadAssertTrue(q.isEmpty());
817	<	}
818	<	catch (InterruptedException e) {
819	<	threadUnexpectedException();
820	<	}
821	<	}
822	<	});
811	>	executor.execute(new CheckedRunnable() {
812	>	public void realRun() throws InterruptedException {
813	>	assertNull(q.poll());
814	>	threadsStarted.await();
815	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
816	>	checkEmpty(q);
817	>	}});
818	>
819	>	executor.execute(new CheckedRunnable() {
820	>	public void realRun() throws InterruptedException {
821	>	threadsStarted.await();
822	>	q.put(one);
823	>	}});
824
838	–	executor.execute(new Runnable() {
839	–	public void run() {
840	–	try {
841	–	Thread.sleep(SMALL_DELAY_MS);
842	–	q.put(one);
843	–	}
844	–	catch (InterruptedException e) {
845	–	threadUnexpectedException();
846	–	}
847	–	}
848	–	});
849	–
825		joinPool(executor);
826		}
827
828		/**
829		* A deserialized serialized queue has same elements in same order
830		*/
831	<	public void testSerialization() {
831	>	public void testSerialization() throws Exception {
832		LinkedBlockingQueue q = populatedQueue(SIZE);
833
834	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
835	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
836	+	out.writeObject(q);
837	+	out.close();
838	+
839	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
840	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
841	+	LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject();
842	+	assertEquals(q.size(), r.size());
843	+	while (!q.isEmpty())
844	+	assertEquals(q.remove(), r.remove());
845	+	}
846	+
847	+	/**
848	+	* drainTo(null) throws NPE
849	+	*/
850	+	public void testDrainToNull() {
851	+	LinkedBlockingQueue q = populatedQueue(SIZE);
852		try {
853	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
854	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
855	<	out.writeObject(q);
856	<	out.close();
857	<
858	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
859	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
860	<	LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject();
861	<	assertEquals(q.size(), r.size());
862	<	while (!q.isEmpty())
863	<	assertEquals(q.remove(), r.remove());
864	<	} catch(Exception e){
865	<	unexpectedException();
853	>	q.drainTo(null);
854	>	shouldThrow();
855	>	} catch (NullPointerException success) {}
856	>	}
857	>
858	>	/**
859	>	* drainTo(this) throws IAE
860	>	*/
861	>	public void testDrainToSelf() {
862	>	LinkedBlockingQueue q = populatedQueue(SIZE);
863	>	try {
864	>	q.drainTo(q);
865	>	shouldThrow();
866	>	} catch (IllegalArgumentException success) {}
867	>	}
868	>
869	>	/**
870	>	* drainTo(c) empties queue into another collection c
871	>	*/
872	>	public void testDrainTo() {
873	>	LinkedBlockingQueue q = populatedQueue(SIZE);
874	>	ArrayList l = new ArrayList();
875	>	q.drainTo(l);
876	>	assertEquals(q.size(), 0);
877	>	assertEquals(l.size(), SIZE);
878	>	for (int i = 0; i < SIZE; ++i)
879	>	assertEquals(l.get(i), new Integer(i));
880	>	q.add(zero);
881	>	q.add(one);
882	>	assertFalse(q.isEmpty());
883	>	assertTrue(q.contains(zero));
884	>	assertTrue(q.contains(one));
885	>	l.clear();
886	>	q.drainTo(l);
887	>	assertEquals(q.size(), 0);
888	>	assertEquals(l.size(), 2);
889	>	for (int i = 0; i < 2; ++i)
890	>	assertEquals(l.get(i), new Integer(i));
891	>	}
892	>
893	>	/**
894	>	* drainTo empties full queue, unblocking a waiting put.
895	>	*/
896	>	public void testDrainToWithActivePut() throws InterruptedException {
897	>	final LinkedBlockingQueue q = populatedQueue(SIZE);
898	>	Thread t = new Thread(new CheckedRunnable() {
899	>	public void realRun() throws InterruptedException {
900	>	q.put(new Integer(SIZE+1));
901	>	}});
902	>
903	>	t.start();
904	>	ArrayList l = new ArrayList();
905	>	q.drainTo(l);
906	>	assertTrue(l.size() >= SIZE);
907	>	for (int i = 0; i < SIZE; ++i)
908	>	assertEquals(l.get(i), new Integer(i));
909	>	t.join();
910	>	assertTrue(q.size() + l.size() >= SIZE);
911	>	}
912	>
913	>	/**
914	>	* drainTo(null, n) throws NPE
915	>	*/
916	>	public void testDrainToNullN() {
917	>	LinkedBlockingQueue q = populatedQueue(SIZE);
918	>	try {
919	>	q.drainTo(null, 0);
920	>	shouldThrow();
921	>	} catch (NullPointerException success) {}
922	>	}
923	>
924	>	/**
925	>	* drainTo(this, n) throws IAE
926	>	*/
927	>	public void testDrainToSelfN() {
928	>	LinkedBlockingQueue q = populatedQueue(SIZE);
929	>	try {
930	>	q.drainTo(q, 0);
931	>	shouldThrow();
932	>	} catch (IllegalArgumentException success) {}
933	>	}
934	>
935	>	/**
936	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
937	>	*/
938	>	public void testDrainToN() {
939	>	LinkedBlockingQueue q = new LinkedBlockingQueue();
940	>	for (int i = 0; i < SIZE + 2; ++i) {
941	>	for (int j = 0; j < SIZE; j++)
942	>	assertTrue(q.offer(new Integer(j)));
943	>	ArrayList l = new ArrayList();
944	>	q.drainTo(l, i);
945	>	int k = (i < SIZE) ? i : SIZE;
946	>	assertEquals(l.size(), k);
947	>	assertEquals(q.size(), SIZE-k);
948	>	for (int j = 0; j < k; ++j)
949	>	assertEquals(l.get(j), new Integer(j));
950	>	while (q.poll() != null) ;
951		}
952		}
953

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