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root/jsr166/jsr166/src/test/tck/LinkedBlockingQueueTest.java

Comparing jsr166/src/test/tck/LinkedBlockingQueueTest.java (file contents):
Revision 1.5 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.37 by jsr166, Fri Nov 5 00:17:22 2010 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/licenses/publicdomain
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10		import java.util.*;
11		import java.util.concurrent.*;
12	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13		import java.io.*;
14
15		public class LinkedBlockingQueueTest extends 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	<
55	>
56		/**
57		* A new queue has the indicated capacity, or Integer.MAX_VALUE if
58		* none given
#	Line 46 | Line 63 | public class LinkedBlockingQueueTest ext
63		}
64
65		/**
66	<	* Constructor throws IAE if  capacity argument nonpositive
66	>	* Constructor throws IAE if capacity argument nonpositive
67		*/
68		public void testConstructor2() {
69		try {
70		LinkedBlockingQueue q = new LinkedBlockingQueue(0);
71		shouldThrow();
72	<	}
56	<	catch (IllegalArgumentException success) {}
72	>	} catch (IllegalArgumentException success) {}
73		}
74
75		/**
#	Line 63 | Line 79 | public class LinkedBlockingQueueTest ext
79		try {
80		LinkedBlockingQueue q = new LinkedBlockingQueue(null);
81		shouldThrow();
82	<	}
67	<	catch (NullPointerException success) {}
82	>	} catch (NullPointerException success) {}
83		}
84
85		/**
#	Line 75 | Line 90 | public class LinkedBlockingQueueTest ext
90		Integer[] ints = new Integer[SIZE];
91		LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
92		shouldThrow();
93	<	}
79	<	catch (NullPointerException success) {}
93	>	} catch (NullPointerException success) {}
94		}
95
96		/**
#	Line 89 | Line 103 | public class LinkedBlockingQueueTest ext
103		ints[i] = new Integer(i);
104		LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
105		shouldThrow();
106	<	}
93	<	catch (NullPointerException success) {}
106	>	} catch (NullPointerException success) {}
107		}
108
109		/**
110		* Queue contains all elements of collection used to initialize
111		*/
112		public void testConstructor6() {
113	<	try {
114	<	Integer[] ints = new Integer[SIZE];
115	<	for (int i = 0; i < SIZE; ++i)
116	<	ints[i] = new Integer(i);
117	<	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
118	<	for (int i = 0; i < SIZE; ++i)
106	<	assertEquals(ints[i], q.poll());
107	<	}
108	<	finally {}
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		/**
#	Line 144 | Line 154 | public class LinkedBlockingQueueTest ext
154		* offer(null) throws NPE
155		*/
156		public void testOfferNull() {
157	<	try {
157	>	try {
158		LinkedBlockingQueue q = new LinkedBlockingQueue(1);
159		q.offer(null);
160		shouldThrow();
161	<	} catch (NullPointerException success) { }
161	>	} catch (NullPointerException success) {}
162	>	}
163	>
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		/**
#	Line 164 | Line 185 | public class LinkedBlockingQueueTest ext
185		* add succeeds if not full; throws ISE if full
186		*/
187		public void testAdd() {
188	<	try {
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		/**
#	Line 183 | Line 204 | public class LinkedBlockingQueueTest ext
204		LinkedBlockingQueue q = new LinkedBlockingQueue(1);
205		q.addAll(null);
206		shouldThrow();
207	<	}
187	<	catch (NullPointerException success) {}
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	+
221		/**
222		* addAll of a collection with null elements throws NPE
223		*/
#	Line 195 | Line 227 | public class LinkedBlockingQueueTest ext
227		Integer[] ints = new Integer[SIZE];
228		q.addAll(Arrays.asList(ints));
229		shouldThrow();
230	<	}
199	<	catch (NullPointerException success) {}
230	>	} catch (NullPointerException success) {}
231		}
232	+
233		/**
234		* addAll of a collection with any null elements throws NPE after
235		* possibly adding some elements
#	Line 210 | Line 242 | public class LinkedBlockingQueueTest ext
242		ints[i] = new Integer(i);
243		q.addAll(Arrays.asList(ints));
244		shouldThrow();
245	<	}
214	<	catch (NullPointerException success) {}
245	>	} catch (NullPointerException success) {}
246		}
247	+
248		/**
249		* addAll throws ISE if not enough room
250		*/
#	Line 224 | Line 256 | public class LinkedBlockingQueueTest ext
256		ints[i] = new Integer(i);
257		q.addAll(Arrays.asList(ints));
258		shouldThrow();
259	<	}
228	<	catch (IllegalStateException success) {}
259	>	} catch (IllegalStateException success) {}
260		}
261	+
262		/**
263		* Queue contains all elements, in traversal order, of successful addAll
264		*/
265		public void testAddAll5() {
266	<	try {
267	<	Integer[] empty = new Integer[0];
268	<	Integer[] ints = new Integer[SIZE];
269	<	for (int i = 0; i < SIZE; ++i)
270	<	ints[i] = new Integer(i);
271	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
272	<	assertFalse(q.addAll(Arrays.asList(empty)));
273	<	assertTrue(q.addAll(Arrays.asList(ints)));
274	<	for (int i = 0; i < SIZE; ++i)
243	<	assertEquals(ints[i], q.poll());
244	<	}
245	<	finally {}
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		/**
278		* put(null) throws NPE
279		*/
280	<	public void testPutNull() {
281	<	try {
280	>	public void testPutNull() throws InterruptedException {
281	>	try {
282		LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
283		q.put(null);
284		shouldThrow();
285	<	}
257	<	catch (NullPointerException success){
258	<	}
259	<	catch (InterruptedException ie) {
260	<	unexpectedException();
261	<	}
285	>	} catch (NullPointerException success) {}
286		}
287
288		/**
289		* all elements successfully put are contained
290		*/
291	<	public void testPut() {
292	<	try {
293	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
294	<	for (int i = 0; i < SIZE; ++i) {
295	<	Integer I = new Integer(i);
296	<	q.put(I);
273	<	assertTrue(q.contains(I));
274	<	}
275	<	assertEquals(0, q.remainingCapacity());
276	<	}
277	<	catch (InterruptedException ie) {
278	<	unexpectedException();
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		/**
302		* put blocks interruptibly if full
303		*/
304	<	public void testBlockingPut() {
305	<	Thread t = new Thread(new Runnable() {
306	<	public void run() {
307	<	int added = 0;
308	<	try {
309	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
310	<	for (int i = 0; i < SIZE; ++i) {
311	<	q.put(new Integer(i));
312	<	++added;
313	<	}
314	<	q.put(new Integer(SIZE));
315	<	threadShouldThrow();
316	<	} catch (InterruptedException ie){
317	<	threadAssertEquals(added, SIZE);
299	<	}
300	<	}});
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	<	}
307	<	catch (InterruptedException ie) {
308	<	unexpectedException();
309	<	}
319	>	Thread.sleep(SHORT_DELAY_MS);
320	>	t.interrupt();
321	>	t.join();
322	>	assertEquals(SIZE, q.size());
323	>	assertEquals(0, q.remainingCapacity());
324		}
325
326		/**
327		* put blocks waiting for take when full
328		*/
329	<	public void testPutWithTake() {
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	<	threadShouldThrow();
345	<	} catch (InterruptedException e){
346	<	threadAssertTrue(added >= 2);
347	<	}
348	<	}
349	<	});
335	<	try {
336	<	t.start();
337	<	Thread.sleep(SHORT_DELAY_MS);
338	<	q.take();
339	<	t.interrupt();
340	<	t.join();
341	<	} catch (Exception e){
342	<	unexpectedException();
343	<	}
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	>	Thread.sleep(SHORT_DELAY_MS);
344	>	assertEquals(q.remainingCapacity(), 0);
345	>	assertEquals(0, q.take());
346	>	Thread.sleep(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() {
355	>	public void testTimedOffer() throws InterruptedException {
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	<	threadShouldThrow();
365	<	} catch (InterruptedException success){}
366	<	}
361	<	});
362	<
363	<	try {
364	<	t.start();
365	<	Thread.sleep(SMALL_DELAY_MS);
366	<	t.interrupt();
367	<	t.join();
368	<	} catch (Exception e){
369	<	unexpectedException();
370	<	}
371	<	}
357	>	Thread t = new Thread(new CheckedRunnable() {
358	>	public void realRun() throws InterruptedException {
359	>	q.put(new Object());
360	>	q.put(new Object());
361	>	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
362	>	try {
363	>	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
364	>	shouldThrow();
365	>	} catch (InterruptedException success) {}
366	>	}});
367
368	<	/**
369	<	* take retrieves elements in FIFO order
370	<	*/
371	<	public void testTake() {
377	<	try {
378	<	LinkedBlockingQueue q = populatedQueue(SIZE);
379	<	for (int i = 0; i < SIZE; ++i) {
380	<	assertEquals(i, ((Integer)q.take()).intValue());
381	<	}
382	<	} catch (InterruptedException e){
383	<	unexpectedException();
384	<	}
368	>	t.start();
369	>	Thread.sleep(SMALL_DELAY_MS);
370	>	t.interrupt();
371	>	t.join();
372		}
373
374		/**
375	<	* take blocks interruptibly when empty
375	>	* take retrieves elements in FIFO order
376		*/
377	<	public void testTakeFromEmpty() {
378	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
379	<	Thread t = new Thread(new Runnable() {
380	<	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();
377	>	public void testTake() throws InterruptedException {
378	>	LinkedBlockingQueue q = populatedQueue(SIZE);
379	>	for (int i = 0; i < SIZE; ++i) {
380	>	assertEquals(i, q.take());
381		}
382		}
383
384		/**
385		* Take removes existing elements until empty, then blocks interruptibly
386		*/
387	<	public void testBlockingTake() {
388	<	Thread t = new Thread(new Runnable() {
389	<	public void run() {
390	<	try {
391	<	LinkedBlockingQueue q = populatedQueue(SIZE);
392	<	for (int i = 0; i < SIZE; ++i) {
393	<	assertEquals(i, ((Integer)q.take()).intValue());
394	<	}
395	<	q.take();
396	<	threadShouldThrow();
397	<	} catch (InterruptedException success){
398	<	}
399	<	}});
387	>	public void testBlockingTake() throws InterruptedException {
388	>	final LinkedBlockingQueue q = populatedQueue(SIZE);
389	>	Thread t = new Thread(new CheckedRunnable() {
390	>	public void realRun() throws InterruptedException {
391	>	for (int i = 0; i < SIZE; ++i) {
392	>	assertEquals(i, q.take());
393	>	}
394	>	try {
395	>	q.take();
396	>	shouldThrow();
397	>	} catch (InterruptedException success) {}
398	>	}});
399	>
400		t.start();
401	<	try {
402	<	Thread.sleep(SHORT_DELAY_MS);
403	<	t.interrupt();
430	<	t.join();
431	<	}
432	<	catch (InterruptedException ie) {
433	<	unexpectedException();
434	<	}
401	>	Thread.sleep(SHORT_DELAY_MS);
402	>	t.interrupt();
403	>	t.join();
404		}
405
437	–
406		/**
407		* poll succeeds unless empty
408		*/
409		public void testPoll() {
410		LinkedBlockingQueue q = populatedQueue(SIZE);
411		for (int i = 0; i < SIZE; ++i) {
412	<	assertEquals(i, ((Integer)q.poll()).intValue());
412	>	assertEquals(i, q.poll());
413		}
414	<	assertNull(q.poll());
414	>	assertNull(q.poll());
415		}
416
417		/**
418	<	* timed pool with zero timeout succeeds when non-empty, else times out
418	>	* timed poll with zero timeout succeeds when non-empty, else times out
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	<	}
458	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
459	<	} catch (InterruptedException e){
460	<	unexpectedException();
461	<	}
420	>	public void testTimedPoll0() throws InterruptedException {
421	>	LinkedBlockingQueue q = populatedQueue(SIZE);
422	>	for (int i = 0; i < SIZE; ++i) {
423	>	assertEquals(i, q.poll(0, MILLISECONDS));
424	>	}
425	>	assertNull(q.poll(0, MILLISECONDS));
426		}
427
428		/**
429	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
429	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
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	<	}
473	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
474	<	} catch (InterruptedException e){
475	<	unexpectedException();
476	<	}
431	>	public void testTimedPoll() throws InterruptedException {
432	>	LinkedBlockingQueue q = populatedQueue(SIZE);
433	>	for (int i = 0; i < SIZE; ++i) {
434	>	assertEquals(i, q.poll(SHORT_DELAY_MS, MILLISECONDS));
435	>	}
436	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
437		}
438
439		/**
440		* Interrupted timed poll throws InterruptedException instead of
441		* returning timeout status
442		*/
443	<	public void testInterruptedTimedPoll() {
444	<	Thread t = new Thread(new Runnable() {
445	<	public void run() {
446	<	try {
447	<	LinkedBlockingQueue q = populatedQueue(SIZE);
448	<	for (int i = 0; i < SIZE; ++i) {
449	<	threadAssertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
450	<	}
451	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
452	<	} catch (InterruptedException success){
453	<	}
454	<	}});
443	>	public void testInterruptedTimedPoll() throws InterruptedException {
444	>	Thread t = new Thread(new CheckedRunnable() {
445	>	public void realRun() throws InterruptedException {
446	>	LinkedBlockingQueue q = populatedQueue(SIZE);
447	>	for (int i = 0; i < SIZE; ++i) {
448	>	assertEquals(i, q.poll(SHORT_DELAY_MS, MILLISECONDS));
449	>	}
450	>	try {
451	>	q.poll(SMALL_DELAY_MS, MILLISECONDS);
452	>	shouldThrow();
453	>	} catch (InterruptedException success) {}
454	>	}});
455	>
456		t.start();
457	<	try {
458	<	Thread.sleep(SHORT_DELAY_MS);
459	<	t.interrupt();
499	<	t.join();
500	<	}
501	<	catch (InterruptedException ie) {
502	<	unexpectedException();
503	<	}
457	>	Thread.sleep(SHORT_DELAY_MS);
458	>	t.interrupt();
459	>	t.join();
460		}
461
462		/**
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) { }
520	–	}
521	–	});
522	–	try {
523	–	t.start();
524	–	Thread.sleep(SMALL_DELAY_MS);
525	–	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
526	–	t.interrupt();
527	–	t.join();
528	–	} catch (Exception e){
529	–	unexpectedException();
530	–	}
531	–	}
532	–
533	–	/**
463		* peek returns next element, or null if empty
464		*/
465		public void testPeek() {
466		LinkedBlockingQueue q = populatedQueue(SIZE);
467		for (int i = 0; i < SIZE; ++i) {
468	<	assertEquals(i, ((Integer)q.peek()).intValue());
469	<	q.poll();
468	>	assertEquals(i, q.peek());
469	>	assertEquals(i, q.poll());
470		assertTrue(q.peek() == null ||
471	<	i != ((Integer)q.peek()).intValue());
471	>	!q.peek().equals(i));
472		}
473	<	assertNull(q.peek());
473	>	assertNull(q.peek());
474		}
475
476		/**
#	Line 550 | Line 479 | public class LinkedBlockingQueueTest ext
479		public void testElement() {
480		LinkedBlockingQueue q = populatedQueue(SIZE);
481		for (int i = 0; i < SIZE; ++i) {
482	<	assertEquals(i, ((Integer)q.element()).intValue());
483	<	q.poll();
482	>	assertEquals(i, q.element());
483	>	assertEquals(i, q.poll());
484		}
485		try {
486		q.element();
487		shouldThrow();
488	<	}
560	<	catch (NoSuchElementException success) {}
488	>	} catch (NoSuchElementException success) {}
489		}
490
491		/**
#	Line 566 | Line 494 | public class LinkedBlockingQueueTest ext
494		public void testRemove() {
495		LinkedBlockingQueue q = populatedQueue(SIZE);
496		for (int i = 0; i < SIZE; ++i) {
497	<	assertEquals(i, ((Integer)q.remove()).intValue());
497	>	assertEquals(i, q.remove());
498		}
499		try {
500		q.remove();
501		shouldThrow();
502	<	} catch (NoSuchElementException success){
575	<	}
502	>	} catch (NoSuchElementException success) {}
503		}
504
505		/**
#	Line 589 | Line 516 | public class LinkedBlockingQueueTest ext
516		}
517		assertTrue(q.isEmpty());
518		}
519	<
519	>
520	>	/**
521	>	* An add following remove(x) succeeds
522	>	*/
523	>	public void testRemoveElementAndAdd() throws InterruptedException {
524	>	LinkedBlockingQueue q = new LinkedBlockingQueue();
525	>	assertTrue(q.add(new Integer(1)));
526	>	assertTrue(q.add(new Integer(2)));
527	>	assertTrue(q.remove(new Integer(1)));
528	>	assertTrue(q.remove(new Integer(2)));
529	>	assertTrue(q.add(new Integer(3)));
530	>	assertTrue(q.take() != null);
531	>	}
532	>
533		/**
534		* contains(x) reports true when elements added but not yet removed
535		*/
#	Line 613 | Line 553 | public class LinkedBlockingQueueTest ext
553		assertEquals(SIZE, q.remainingCapacity());
554		q.add(one);
555		assertFalse(q.isEmpty());
556	+	assertTrue(q.contains(one));
557		q.clear();
558		assertTrue(q.isEmpty());
559		}
#	Line 667 | Line 608 | public class LinkedBlockingQueueTest ext
608		}
609
610		/**
611	<	* toArray contains all elements
611	>	* toArray contains all elements in FIFO order
612		*/
613		public void testToArray() {
614		LinkedBlockingQueue q = populatedQueue(SIZE);
615	<	Object[] o = q.toArray();
616	<	try {
617	<	for(int i = 0; i < o.length; i++)
618	<	assertEquals(o[i], q.take());
619	<	} catch (InterruptedException e){
620	<	unexpectedException();
621	<	}
615	>	Object[] o = q.toArray();
616	>	for (int i = 0; i < o.length; i++)
617	>	assertSame(o[i], q.poll());
618	>	}
619	>
620	>	/**
621	>	* toArray(a) contains all elements in FIFO order
622	>	*/
623	>	public void testToArray2() throws InterruptedException {
624	>	LinkedBlockingQueue<Integer> q = populatedQueue(SIZE);
625	>	Integer[] ints = new Integer[SIZE];
626	>	Integer[] array = q.toArray(ints);
627	>	assertSame(ints, array);
628	>	for (int i = 0; i < ints.length; i++)
629	>	assertSame(ints[i], q.poll());
630	>	}
631	>
632	>	/**
633	>	* toArray(null) throws NullPointerException
634	>	*/
635	>	public void testToArray_NullArg() {
636	>	LinkedBlockingQueue q = populatedQueue(SIZE);
637	>	try {
638	>	q.toArray(null);
639	>	shouldThrow();
640	>	} catch (NullPointerException success) {}
641		}
642
643		/**
644	<	* toArray(a) contains all elements
645	<	*/
646	<	public void testToArray2() {
647	<	LinkedBlockingQueue q = populatedQueue(SIZE);
648	<	Integer[] ints = new Integer[SIZE];
649	<	ints = (Integer[])q.toArray(ints);
650	<	try {
651	<	for(int i = 0; i < ints.length; i++)
692	<	assertEquals(ints[i], q.take());
693	<	} catch (InterruptedException e){
694	<	unexpectedException();
695	<	}
644	>	* toArray(incompatible array type) throws ArrayStoreException
645	>	*/
646	>	public void testToArray1_BadArg() {
647	>	LinkedBlockingQueue q = populatedQueue(SIZE);
648	>	try {
649	>	q.toArray(new String[10]);
650	>	shouldThrow();
651	>	} catch (ArrayStoreException success) {}
652		}
653	<
653	>
654	>
655		/**
656		* iterator iterates through all elements
657		*/
658	<	public void testIterator() {
658	>	public void testIterator() throws InterruptedException {
659		LinkedBlockingQueue q = populatedQueue(SIZE);
660	<	Iterator it = q.iterator();
661	<	try {
662	<	while(it.hasNext()){
663	<	assertEquals(it.next(), q.take());
707	<	}
708	<	} catch (InterruptedException e){
709	<	unexpectedException();
710	<	}
660	>	Iterator it = q.iterator();
661	>	while (it.hasNext()) {
662	>	assertEquals(it.next(), q.take());
663	>	}
664		}
665
666		/**
667		* iterator.remove removes current element
668		*/
669	<	public void testIteratorRemove () {
669	>	public void testIteratorRemove() {
670		final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
671		q.add(two);
672		q.add(one);
#	Line 722 | Line 675 | public class LinkedBlockingQueueTest ext
675		Iterator it = q.iterator();
676		it.next();
677		it.remove();
678	<
678	>
679		it = q.iterator();
680	<	assertEquals(it.next(), one);
681	<	assertEquals(it.next(), three);
680	>	assertSame(it.next(), one);
681	>	assertSame(it.next(), three);
682		assertFalse(it.hasNext());
683		}
684
#	Line 741 | Line 694 | public class LinkedBlockingQueueTest ext
694		assertEquals(0, q.remainingCapacity());
695		int k = 0;
696		for (Iterator it = q.iterator(); it.hasNext();) {
697	<	int i = ((Integer)(it.next())).intValue();
745	<	assertEquals(++k, i);
697	>	assertEquals(++k, it.next());
698		}
699		assertEquals(3, k);
700		}
#	Line 750 | Line 702 | public class LinkedBlockingQueueTest ext
702		/**
703		* Modifications do not cause iterators to fail
704		*/
705	<	public void testWeaklyConsistentIteration () {
705	>	public void testWeaklyConsistentIteration() {
706		final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
707		q.add(one);
708		q.add(two);
709		q.add(three);
710	<	try {
711	<	for (Iterator it = q.iterator(); it.hasNext();) {
712	<	q.remove();
761	<	it.next();
762	<	}
763	<	}
764	<	catch (ConcurrentModificationException e) {
765	<	unexpectedException();
710	>	for (Iterator it = q.iterator(); it.hasNext();) {
711	>	q.remove();
712	>	it.next();
713		}
714		assertEquals(0, q.size());
715		}
#	Line 777 | Line 724 | public class LinkedBlockingQueueTest ext
724		for (int i = 0; i < SIZE; ++i) {
725		assertTrue(s.indexOf(String.valueOf(i)) >= 0);
726		}
727	<	}
727	>	}
728
729
730		/**
#	Line 788 | Line 735 | public class LinkedBlockingQueueTest ext
735		q.add(one);
736		q.add(two);
737		ExecutorService executor = Executors.newFixedThreadPool(2);
738	<	executor.execute(new Runnable() {
739	<	public void run() {
740	<	threadAssertFalse(q.offer(three));
741	<	try {
742	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
743	<	threadAssertEquals(0, q.remainingCapacity());
744	<	}
745	<	catch (InterruptedException e) {
746	<	threadUnexpectedException();
747	<	}
748	<	}
749	<	});
738	>	executor.execute(new CheckedRunnable() {
739	>	public void realRun() throws InterruptedException {
740	>	assertFalse(q.offer(three));
741	>	assertTrue(q.offer(three, MEDIUM_DELAY_MS, MILLISECONDS));
742	>	assertEquals(0, q.remainingCapacity());
743	>	}});
744	>
745	>	executor.execute(new CheckedRunnable() {
746	>	public void realRun() throws InterruptedException {
747	>	Thread.sleep(SMALL_DELAY_MS);
748	>	assertSame(one, q.take());
749	>	}});
750
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	–
751		joinPool(executor);
752		}
753
#	Line 822 | Line 757 | public class LinkedBlockingQueueTest ext
757		public void testPollInExecutor() {
758		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
759		ExecutorService executor = Executors.newFixedThreadPool(2);
760	<	executor.execute(new Runnable() {
761	<	public void run() {
762	<	threadAssertNull(q.poll());
763	<	try {
764	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
765	<	threadAssertTrue(q.isEmpty());
766	<	}
767	<	catch (InterruptedException e) {
768	<	threadUnexpectedException();
769	<	}
770	<	}
771	<	});
760	>	executor.execute(new CheckedRunnable() {
761	>	public void realRun() throws InterruptedException {
762	>	assertNull(q.poll());
763	>	assertSame(one, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
764	>	assertTrue(q.isEmpty());
765	>	}});
766	>
767	>	executor.execute(new CheckedRunnable() {
768	>	public void realRun() throws InterruptedException {
769	>	Thread.sleep(SMALL_DELAY_MS);
770	>	q.put(one);
771	>	}});
772
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	–
773		joinPool(executor);
774		}
775
776		/**
777		* A deserialized serialized queue has same elements in same order
778		*/
779	<	public void testSerialization() {
779	>	public void testSerialization() throws Exception {
780	>	LinkedBlockingQueue q = populatedQueue(SIZE);
781	>
782	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
783	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
784	>	out.writeObject(q);
785	>	out.close();
786	>
787	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
788	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
789	>	LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject();
790	>	assertEquals(q.size(), r.size());
791	>	while (!q.isEmpty())
792	>	assertEquals(q.remove(), r.remove());
793	>	}
794	>
795	>	/**
796	>	* drainTo(null) throws NPE
797	>	*/
798	>	public void testDrainToNull() {
799	>	LinkedBlockingQueue q = populatedQueue(SIZE);
800	>	try {
801	>	q.drainTo(null);
802	>	shouldThrow();
803	>	} catch (NullPointerException success) {}
804	>	}
805	>
806	>	/**
807	>	* drainTo(this) throws IAE
808	>	*/
809	>	public void testDrainToSelf() {
810	>	LinkedBlockingQueue q = populatedQueue(SIZE);
811	>	try {
812	>	q.drainTo(q);
813	>	shouldThrow();
814	>	} catch (IllegalArgumentException success) {}
815	>	}
816	>
817	>	/**
818	>	* drainTo(c) empties queue into another collection c
819	>	*/
820	>	public void testDrainTo() {
821	>	LinkedBlockingQueue q = populatedQueue(SIZE);
822	>	ArrayList l = new ArrayList();
823	>	q.drainTo(l);
824	>	assertEquals(q.size(), 0);
825	>	assertEquals(l.size(), SIZE);
826	>	for (int i = 0; i < SIZE; ++i)
827	>	assertEquals(l.get(i), new Integer(i));
828	>	q.add(zero);
829	>	q.add(one);
830	>	assertFalse(q.isEmpty());
831	>	assertTrue(q.contains(zero));
832	>	assertTrue(q.contains(one));
833	>	l.clear();
834	>	q.drainTo(l);
835	>	assertEquals(q.size(), 0);
836	>	assertEquals(l.size(), 2);
837	>	for (int i = 0; i < 2; ++i)
838	>	assertEquals(l.get(i), new Integer(i));
839	>	}
840	>
841	>	/**
842	>	* drainTo empties full queue, unblocking a waiting put.
843	>	*/
844	>	public void testDrainToWithActivePut() throws InterruptedException {
845	>	final LinkedBlockingQueue q = populatedQueue(SIZE);
846	>	Thread t = new Thread(new CheckedRunnable() {
847	>	public void realRun() throws InterruptedException {
848	>	q.put(new Integer(SIZE+1));
849	>	}});
850	>
851	>	t.start();
852	>	ArrayList l = new ArrayList();
853	>	q.drainTo(l);
854	>	assertTrue(l.size() >= SIZE);
855	>	for (int i = 0; i < SIZE; ++i)
856	>	assertEquals(l.get(i), new Integer(i));
857	>	t.join();
858	>	assertTrue(q.size() + l.size() >= SIZE);
859	>	}
860	>
861	>	/**
862	>	* drainTo(null, n) throws NPE
863	>	*/
864	>	public void testDrainToNullN() {
865		LinkedBlockingQueue q = populatedQueue(SIZE);
866	+	try {
867	+	q.drainTo(null, 0);
868	+	shouldThrow();
869	+	} catch (NullPointerException success) {}
870	+	}
871
872	+	/**
873	+	* drainTo(this, n) throws IAE
874	+	*/
875	+	public void testDrainToSelfN() {
876	+	LinkedBlockingQueue q = populatedQueue(SIZE);
877		try {
878	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
879	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
880	<	out.writeObject(q);
881	<	out.close();
882	<
883	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
884	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
885	<	LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject();
886	<	assertEquals(q.size(), r.size());
887	<	while (!q.isEmpty())
888	<	assertEquals(q.remove(), r.remove());
889	<	} catch(Exception e){
890	<	unexpectedException();
878	>	q.drainTo(q, 0);
879	>	shouldThrow();
880	>	} catch (IllegalArgumentException success) {}
881	>	}
882	>
883	>	/**
884	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
885	>	*/
886	>	public void testDrainToN() {
887	>	LinkedBlockingQueue q = new LinkedBlockingQueue();
888	>	for (int i = 0; i < SIZE + 2; ++i) {
889	>	for (int j = 0; j < SIZE; j++)
890	>	assertTrue(q.offer(new Integer(j)));
891	>	ArrayList l = new ArrayList();
892	>	q.drainTo(l, i);
893	>	int k = (i < SIZE) ? i : SIZE;
894	>	assertEquals(l.size(), k);
895	>	assertEquals(q.size(), SIZE-k);
896	>	for (int j = 0; j < k; ++j)
897	>	assertEquals(l.get(j), new Integer(j));
898	>	while (q.poll() != null) ;
899		}
900		}
901

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