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Comparing jsr166/src/test/tck/LinkedBlockingQueueTest.java (file contents):
Revision 1.35 by jsr166, Wed Nov 3 16:46:34 2010 UTC vs.
Revision 1.76 by jsr166, Fri Aug 4 03:30:21 2017 UTC

#	Line 1 | Line 1
1		/*
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
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.*;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	<	import java.io.*;
10	>
11	>	import java.util.ArrayList;
12	>	import java.util.Arrays;
13	>	import java.util.Collection;
14	>	import java.util.Iterator;
15	>	import java.util.NoSuchElementException;
16	>	import java.util.Queue;
17	>	import java.util.concurrent.BlockingQueue;
18	>	import java.util.concurrent.CountDownLatch;
19	>	import java.util.concurrent.Executors;
20	>	import java.util.concurrent.ExecutorService;
21	>	import java.util.concurrent.LinkedBlockingQueue;
22	>
23	>	import junit.framework.Test;
24
25		public class LinkedBlockingQueueTest extends JSR166TestCase {
26
#	Line 22 | Line 32 | public class LinkedBlockingQueueTest ext
32
33		public static class Bounded extends BlockingQueueTest {
34		protected BlockingQueue emptyCollection() {
35	<	return new LinkedBlockingQueue(20);
35	>	return new LinkedBlockingQueue(SIZE);
36		}
37		}
38
39		public static void main(String[] args) {
40	<	junit.textui.TestRunner.run(suite());
40	>	main(suite(), args);
41		}
42
43		public static Test suite() {
44	+	class Implementation implements CollectionImplementation {
45	+	public Class<?> klazz() { return LinkedBlockingQueue.class; }
46	+	public Collection emptyCollection() { return new LinkedBlockingQueue(); }
47	+	public Object makeElement(int i) { return i; }
48	+	public boolean isConcurrent() { return true; }
49	+	public boolean permitsNulls() { return false; }
50	+	}
51		return newTestSuite(LinkedBlockingQueueTest.class,
52		new Unbounded().testSuite(),
53	<	new Bounded().testSuite());
53	>	new Bounded().testSuite(),
54	>	CollectionTest.testSuite(new Implementation()));
55		}
56
39	–
57		/**
58	<	* Create a queue of given size containing consecutive
59	<	* Integers 0 ... n.
58	>	* Returns a new queue of given size containing consecutive
59	>	* Integers 0 ... n - 1.
60		*/
61	<	private LinkedBlockingQueue populatedQueue(int n) {
62	<	LinkedBlockingQueue q = new LinkedBlockingQueue(n);
61	>	private static LinkedBlockingQueue<Integer> populatedQueue(int n) {
62	>	LinkedBlockingQueue<Integer> q =
63	>	new LinkedBlockingQueue<Integer>(n);
64		assertTrue(q.isEmpty());
65		for (int i = 0; i < n; i++)
66		assertTrue(q.offer(new Integer(i)));
67		assertFalse(q.isEmpty());
68		assertEquals(0, q.remainingCapacity());
69		assertEquals(n, q.size());
70	+	assertEquals((Integer) 0, q.peek());
71		return q;
72		}
73
#	Line 62 | Line 81 | public class LinkedBlockingQueueTest ext
81		}
82
83		/**
84	<	* Constructor throws IAE if capacity argument nonpositive
84	>	* Constructor throws IllegalArgumentException if capacity argument nonpositive
85		*/
86		public void testConstructor2() {
87		try {
88	<	LinkedBlockingQueue q = new LinkedBlockingQueue(0);
88	>	new LinkedBlockingQueue(0);
89		shouldThrow();
90		} catch (IllegalArgumentException success) {}
91		}
92
93		/**
94	<	* Initializing from null Collection throws NPE
94	>	* Initializing from null Collection throws NullPointerException
95		*/
96		public void testConstructor3() {
97		try {
98	<	LinkedBlockingQueue q = new LinkedBlockingQueue(null);
98	>	new LinkedBlockingQueue(null);
99		shouldThrow();
100		} catch (NullPointerException success) {}
101		}
102
103		/**
104	<	* Initializing from Collection of null elements throws NPE
104	>	* Initializing from Collection of null elements throws NullPointerException
105		*/
106		public void testConstructor4() {
107	+	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
108		try {
109	<	Integer[] ints = new Integer[SIZE];
90	<	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
109	>	new LinkedBlockingQueue(elements);
110		shouldThrow();
111		} catch (NullPointerException success) {}
112		}
113
114		/**
115	<	* Initializing from Collection with some null elements throws NPE
115	>	* Initializing from Collection with some null elements throws
116	>	* NullPointerException
117		*/
118		public void testConstructor5() {
119	+	Integer[] ints = new Integer[SIZE];
120	+	for (int i = 0; i < SIZE - 1; ++i)
121	+	ints[i] = new Integer(i);
122	+	Collection<Integer> elements = Arrays.asList(ints);
123		try {
124	<	Integer[] ints = new Integer[SIZE];
101	<	for (int i = 0; i < SIZE-1; ++i)
102	<	ints[i] = new Integer(i);
103	<	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
124	>	new LinkedBlockingQueue(elements);
125		shouldThrow();
126		} catch (NullPointerException success) {}
127		}
#	Line 136 | Line 157 | public class LinkedBlockingQueueTest ext
157		* remainingCapacity decreases on add, increases on remove
158		*/
159		public void testRemainingCapacity() {
160	<	LinkedBlockingQueue q = populatedQueue(SIZE);
160	>	BlockingQueue q = populatedQueue(SIZE);
161		for (int i = 0; i < SIZE; ++i) {
162		assertEquals(i, q.remainingCapacity());
163	<	assertEquals(SIZE-i, q.size());
164	<	q.remove();
163	>	assertEquals(SIZE, q.size() + q.remainingCapacity());
164	>	assertEquals(i, q.remove());
165		}
166		for (int i = 0; i < SIZE; ++i) {
167	<	assertEquals(SIZE-i, q.remainingCapacity());
168	<	assertEquals(i, q.size());
169	<	q.add(new Integer(i));
167	>	assertEquals(SIZE - i, q.remainingCapacity());
168	>	assertEquals(SIZE, q.size() + q.remainingCapacity());
169	>	assertTrue(q.add(i));
170		}
171		}
172
173		/**
153	–	* offer(null) throws NPE
154	–	*/
155	–	public void testOfferNull() {
156	–	try {
157	–	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
158	–	q.offer(null);
159	–	shouldThrow();
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	–	/**
174		* Offer succeeds if not full; fails if full
175		*/
176		public void testOffer() {
#	Line 181 | Line 180 | public class LinkedBlockingQueueTest ext
180		}
181
182		/**
183	<	* add succeeds if not full; throws ISE if full
183	>	* add succeeds if not full; throws IllegalStateException if full
184		*/
185		public void testAdd() {
186	+	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
187	+	for (int i = 0; i < SIZE; ++i)
188	+	assertTrue(q.add(new Integer(i)));
189	+	assertEquals(0, q.remainingCapacity());
190		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());
191		q.add(new Integer(SIZE));
192		shouldThrow();
193		} catch (IllegalStateException success) {}
194		}
195
196		/**
197	<	* addAll(null) throws NPE
200	<	*/
201	<	public void testAddAll1() {
202	<	try {
203	<	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
204	<	q.addAll(null);
205	<	shouldThrow();
206	<	} catch (NullPointerException success) {}
207	<	}
208	<
209	<	/**
210	<	* addAll(this) throws IAE
197	>	* addAll(this) throws IllegalArgumentException
198		*/
199		public void testAddAllSelf() {
200	+	LinkedBlockingQueue q = populatedQueue(SIZE);
201		try {
214	–	LinkedBlockingQueue q = populatedQueue(SIZE);
202		q.addAll(q);
203		shouldThrow();
204		} catch (IllegalArgumentException success) {}
205		}
206
207		/**
221	–	* addAll of a collection with null elements throws NPE
222	–	*/
223	–	public void testAddAll2() {
224	–	try {
225	–	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
226	–	Integer[] ints = new Integer[SIZE];
227	–	q.addAll(Arrays.asList(ints));
228	–	shouldThrow();
229	–	} catch (NullPointerException success) {}
230	–	}
231	–
232	–	/**
208		* addAll of a collection with any null elements throws NPE after
209		* possibly adding some elements
210		*/
211		public void testAddAll3() {
212	+	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
213	+	Integer[] ints = new Integer[SIZE];
214	+	for (int i = 0; i < SIZE - 1; ++i)
215	+	ints[i] = new Integer(i);
216	+	Collection<Integer> elements = Arrays.asList(ints);
217		try {
218	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
239	<	Integer[] ints = new Integer[SIZE];
240	<	for (int i = 0; i < SIZE-1; ++i)
241	<	ints[i] = new Integer(i);
242	<	q.addAll(Arrays.asList(ints));
218	>	q.addAll(elements);
219		shouldThrow();
220		} catch (NullPointerException success) {}
221		}
222
223		/**
224	<	* addAll throws ISE if not enough room
224	>	* addAll throws IllegalStateException if not enough room
225		*/
226		public void testAddAll4() {
227	+	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE - 1);
228	+	Integer[] ints = new Integer[SIZE];
229	+	for (int i = 0; i < SIZE; ++i)
230	+	ints[i] = new Integer(i);
231	+	Collection<Integer> elements = Arrays.asList(ints);
232		try {
233	<	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
253	<	Integer[] ints = new Integer[SIZE];
254	<	for (int i = 0; i < SIZE; ++i)
255	<	ints[i] = new Integer(i);
256	<	q.addAll(Arrays.asList(ints));
233	>	q.addAll(elements);
234		shouldThrow();
235		} catch (IllegalStateException success) {}
236		}
#	Line 274 | Line 251 | public class LinkedBlockingQueueTest ext
251		}
252
253		/**
277	–	* put(null) throws NPE
278	–	*/
279	–	public void testPutNull() throws InterruptedException {
280	–	try {
281	–	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
282	–	q.put(null);
283	–	shouldThrow();
284	–	} catch (NullPointerException success) {}
285	–	}
286	–
287	–	/**
254		* all elements successfully put are contained
255		*/
256		public void testPut() throws InterruptedException {
257		LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
258		for (int i = 0; i < SIZE; ++i) {
259	<	Integer I = new Integer(i);
260	<	q.put(I);
261	<	assertTrue(q.contains(I));
259	>	Integer x = new Integer(i);
260	>	q.put(x);
261	>	assertTrue(q.contains(x));
262		}
263		assertEquals(0, q.remainingCapacity());
264		}
#	Line 302 | Line 268 | public class LinkedBlockingQueueTest ext
268		*/
269		public void testBlockingPut() throws InterruptedException {
270		final LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
271	<	Thread t = new Thread(new CheckedRunnable() {
271	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
272	>	Thread t = newStartedThread(new CheckedRunnable() {
273		public void realRun() throws InterruptedException {
274		for (int i = 0; i < SIZE; ++i)
275		q.put(i);
276		assertEquals(SIZE, q.size());
277		assertEquals(0, q.remainingCapacity());
278	+
279	+	Thread.currentThread().interrupt();
280	+	try {
281	+	q.put(99);
282	+	shouldThrow();
283	+	} catch (InterruptedException success) {}
284	+	assertFalse(Thread.interrupted());
285	+
286	+	pleaseInterrupt.countDown();
287		try {
288		q.put(99);
289		shouldThrow();
290		} catch (InterruptedException success) {}
291	+	assertFalse(Thread.interrupted());
292		}});
293
294	<	t.start();
295	<	Thread.sleep(SHORT_DELAY_MS);
294	>	await(pleaseInterrupt);
295	>	assertThreadBlocks(t, Thread.State.WAITING);
296		t.interrupt();
297	<	t.join();
297	>	awaitTermination(t);
298		assertEquals(SIZE, q.size());
299		assertEquals(0, q.remainingCapacity());
300		}
301
302		/**
303	<	* put blocks waiting for take when full
303	>	* put blocks interruptibly waiting for take when full
304		*/
305		public void testPutWithTake() throws InterruptedException {
306		final int capacity = 2;
307		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
308	<	Thread t = new Thread(new CheckedRunnable() {
308	>	final CountDownLatch pleaseTake = new CountDownLatch(1);
309	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
310	>	Thread t = newStartedThread(new CheckedRunnable() {
311		public void realRun() throws InterruptedException {
312	<	for (int i = 0; i < capacity + 1; i++)
312	>	for (int i = 0; i < capacity; i++)
313		q.put(i);
314	+	pleaseTake.countDown();
315	+	q.put(86);
316	+
317	+	Thread.currentThread().interrupt();
318		try {
319		q.put(99);
320		shouldThrow();
321		} catch (InterruptedException success) {}
322	+	assertFalse(Thread.interrupted());
323	+
324	+	pleaseInterrupt.countDown();
325	+	try {
326	+	q.put(99);
327	+	shouldThrow();
328	+	} catch (InterruptedException success) {}
329	+	assertFalse(Thread.interrupted());
330		}});
331
332	<	t.start();
333	<	Thread.sleep(SHORT_DELAY_MS);
343	<	assertEquals(q.remainingCapacity(), 0);
332	>	await(pleaseTake);
333	>	assertEquals(0, q.remainingCapacity());
334		assertEquals(0, q.take());
335	<	Thread.sleep(SHORT_DELAY_MS);
335	>
336	>	await(pleaseInterrupt);
337	>	assertThreadBlocks(t, Thread.State.WAITING);
338		t.interrupt();
339	<	t.join();
340	<	assertEquals(q.remainingCapacity(), 0);
339	>	awaitTermination(t);
340	>	assertEquals(0, q.remainingCapacity());
341		}
342
343		/**
344		* timed offer times out if full and elements not taken
345		*/
346	<	public void testTimedOffer() throws InterruptedException {
346	>	public void testTimedOffer() {
347		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
348	<	Thread t = new Thread(new CheckedRunnable() {
348	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
349	>	Thread t = newStartedThread(new CheckedRunnable() {
350		public void realRun() throws InterruptedException {
351		q.put(new Object());
352		q.put(new Object());
353	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
353	>
354	>	long startTime = System.nanoTime();
355	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
356	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
357	>
358	>	Thread.currentThread().interrupt();
359	>	try {
360	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
361	>	shouldThrow();
362	>	} catch (InterruptedException success) {}
363	>	assertFalse(Thread.interrupted());
364	>
365	>	pleaseInterrupt.countDown();
366		try {
367	<	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
367	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
368		shouldThrow();
369		} catch (InterruptedException success) {}
370	+	assertFalse(Thread.interrupted());
371		}});
372
373	<	t.start();
374	<	Thread.sleep(SMALL_DELAY_MS);
373	>	await(pleaseInterrupt);
374	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
375		t.interrupt();
376	<	t.join();
376	>	awaitTermination(t);
377		}
378
379		/**
#	Line 384 | Line 390 | public class LinkedBlockingQueueTest ext
390		* Take removes existing elements until empty, then blocks interruptibly
391		*/
392		public void testBlockingTake() throws InterruptedException {
393	<	final LinkedBlockingQueue q = populatedQueue(SIZE);
394	<	Thread t = new Thread(new CheckedRunnable() {
393	>	final BlockingQueue q = populatedQueue(SIZE);
394	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
395	>	Thread t = newStartedThread(new CheckedRunnable() {
396		public void realRun() throws InterruptedException {
397	<	for (int i = 0; i < SIZE; ++i) {
398	<	assertEquals(i, q.take());
399	<	}
397	>	for (int i = 0; i < SIZE; i++) assertEquals(i, q.take());
398	>
399	>	Thread.currentThread().interrupt();
400	>	try {
401	>	q.take();
402	>	shouldThrow();
403	>	} catch (InterruptedException success) {}
404	>	assertFalse(Thread.interrupted());
405	>
406	>	pleaseInterrupt.countDown();
407		try {
408		q.take();
409		shouldThrow();
410		} catch (InterruptedException success) {}
411	+	assertFalse(Thread.interrupted());
412		}});
413
414	<	t.start();
415	<	Thread.sleep(SHORT_DELAY_MS);
414	>	await(pleaseInterrupt);
415	>	assertThreadBlocks(t, Thread.State.WAITING);
416		t.interrupt();
417	<	t.join();
417	>	awaitTermination(t);
418		}
419
420		/**
#	Line 428 | Line 443 | public class LinkedBlockingQueueTest ext
443		* timed poll with nonzero timeout succeeds when non-empty, else times out
444		*/
445		public void testTimedPoll() throws InterruptedException {
446	<	LinkedBlockingQueue q = populatedQueue(SIZE);
446	>	LinkedBlockingQueue<Integer> q = populatedQueue(SIZE);
447		for (int i = 0; i < SIZE; ++i) {
448	<	assertEquals(i, q.poll(SHORT_DELAY_MS, MILLISECONDS));
449	<	}
450	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
448	>	long startTime = System.nanoTime();
449	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
450	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
451	>	}
452	>	long startTime = System.nanoTime();
453	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
454	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
455	>	checkEmpty(q);
456		}
457
458		/**
#	Line 440 | Line 460 | public class LinkedBlockingQueueTest ext
460		* returning timeout status
461		*/
462		public void testInterruptedTimedPoll() throws InterruptedException {
463	<	Thread t = new Thread(new CheckedRunnable() {
463	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
464	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
465	>	Thread t = newStartedThread(new CheckedRunnable() {
466		public void realRun() throws InterruptedException {
467	<	LinkedBlockingQueue q = populatedQueue(SIZE);
468	<	for (int i = 0; i < SIZE; ++i) {
469	<	assertEquals(i, q.poll(SHORT_DELAY_MS, MILLISECONDS));
470	<	}
467	>	long startTime = System.nanoTime();
468	>	for (int i = 0; i < SIZE; i++)
469	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
470	>
471	>	Thread.currentThread().interrupt();
472	>	try {
473	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
474	>	shouldThrow();
475	>	} catch (InterruptedException success) {}
476	>	assertFalse(Thread.interrupted());
477	>
478	>	pleaseInterrupt.countDown();
479		try {
480	<	q.poll(SMALL_DELAY_MS, MILLISECONDS);
480	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
481		shouldThrow();
482		} catch (InterruptedException success) {}
483	+	assertFalse(Thread.interrupted());
484	+
485	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
486		}});
487
488	<	t.start();
489	<	Thread.sleep(SHORT_DELAY_MS);
488	>	await(pleaseInterrupt);
489	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
490		t.interrupt();
491	<	t.join();
491	>	awaitTermination(t);
492	>	checkEmpty(q);
493		}
494
495		/**
#	Line 502 | Line 536 | public class LinkedBlockingQueueTest ext
536		}
537
538		/**
505	–	* remove(x) removes x and returns true if present
506	–	*/
507	–	public void testRemoveElement() {
508	–	LinkedBlockingQueue q = populatedQueue(SIZE);
509	–	for (int i = 1; i < SIZE; i+=2) {
510	–	assertTrue(q.remove(new Integer(i)));
511	–	}
512	–	for (int i = 0; i < SIZE; i+=2) {
513	–	assertTrue(q.remove(new Integer(i)));
514	–	assertFalse(q.remove(new Integer(i+1)));
515	–	}
516	–	assertTrue(q.isEmpty());
517	–	}
518	–
519	–	/**
539		* An add following remove(x) succeeds
540		*/
541		public void testRemoveElementAndAdd() throws InterruptedException {
#	Line 526 | Line 545 | public class LinkedBlockingQueueTest ext
545		assertTrue(q.remove(new Integer(1)));
546		assertTrue(q.remove(new Integer(2)));
547		assertTrue(q.add(new Integer(3)));
548	<	assertTrue(q.take() != null);
548	>	assertNotNull(q.take());
549		}
550
551		/**
#	Line 585 | Line 604 | public class LinkedBlockingQueueTest ext
604		assertTrue(changed);
605
606		assertTrue(q.containsAll(p));
607	<	assertEquals(SIZE-i, q.size());
607	>	assertEquals(SIZE - i, q.size());
608		p.remove();
609		}
610		}
#	Line 598 | Line 617 | public class LinkedBlockingQueueTest ext
617		LinkedBlockingQueue q = populatedQueue(SIZE);
618		LinkedBlockingQueue p = populatedQueue(i);
619		assertTrue(q.removeAll(p));
620	<	assertEquals(SIZE-i, q.size());
620	>	assertEquals(SIZE - i, q.size());
621		for (int j = 0; j < i; ++j) {
622	<	Integer I = (Integer)(p.remove());
623	<	assertFalse(q.contains(I));
622	>	Integer x = (Integer)(p.remove());
623	>	assertFalse(q.contains(x));
624		}
625		}
626		}
627
628		/**
629	<	* toArray contains all elements
629	>	* toArray contains all elements in FIFO order
630		*/
631	<	public void testToArray() throws InterruptedException {
631	>	public void testToArray() {
632		LinkedBlockingQueue q = populatedQueue(SIZE);
633		Object[] o = q.toArray();
634		for (int i = 0; i < o.length; i++)
635	<	assertEquals(o[i], q.take());
635	>	assertSame(o[i], q.poll());
636		}
637
638		/**
639	<	* toArray(a) contains all elements
639	>	* toArray(a) contains all elements in FIFO order
640		*/
641		public void testToArray2() throws InterruptedException {
642	<	LinkedBlockingQueue q = populatedQueue(SIZE);
642	>	LinkedBlockingQueue<Integer> q = populatedQueue(SIZE);
643		Integer[] ints = new Integer[SIZE];
644	<	ints = (Integer[])q.toArray(ints);
644	>	Integer[] array = q.toArray(ints);
645	>	assertSame(ints, array);
646		for (int i = 0; i < ints.length; i++)
647	<	assertEquals(ints[i], q.take());
628	<	}
629	<
630	<	/**
631	<	* toArray(null) throws NullPointerException
632	<	*/
633	<	public void testToArray_NullArg() {
634	<	LinkedBlockingQueue q = populatedQueue(SIZE);
635	<	try {
636	<	q.toArray(null);
637	<	shouldThrow();
638	<	} catch (NullPointerException success) {}
647	>	assertSame(ints[i], q.poll());
648		}
649
650		/**
#	Line 649 | Line 658 | public class LinkedBlockingQueueTest ext
658		} catch (ArrayStoreException success) {}
659		}
660
652	–
661		/**
662		* iterator iterates through all elements
663		*/
664		public void testIterator() throws InterruptedException {
665		LinkedBlockingQueue q = populatedQueue(SIZE);
666		Iterator it = q.iterator();
667	<	while (it.hasNext()) {
667	>	int i;
668	>	for (i = 0; it.hasNext(); i++)
669	>	assertTrue(q.contains(it.next()));
670	>	assertEquals(i, SIZE);
671	>	assertIteratorExhausted(it);
672	>
673	>	it = q.iterator();
674	>	for (i = 0; it.hasNext(); i++)
675		assertEquals(it.next(), q.take());
676	<	}
676	>	assertEquals(i, SIZE);
677	>	assertIteratorExhausted(it);
678	>	}
679	>
680	>	/**
681	>	* iterator of empty collection has no elements
682	>	*/
683	>	public void testEmptyIterator() {
684	>	assertIteratorExhausted(new LinkedBlockingQueue().iterator());
685		}
686
687		/**
#	Line 680 | Line 703 | public class LinkedBlockingQueueTest ext
703		assertFalse(it.hasNext());
704		}
705
683	–
706		/**
707		* iterator ordering is FIFO
708		*/
#	Line 712 | Line 734 | public class LinkedBlockingQueueTest ext
734		assertEquals(0, q.size());
735		}
736
715	–
737		/**
738		* toString contains toStrings of elements
739		*/
#	Line 720 | Line 741 | public class LinkedBlockingQueueTest ext
741		LinkedBlockingQueue q = populatedQueue(SIZE);
742		String s = q.toString();
743		for (int i = 0; i < SIZE; ++i) {
744	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
744	>	assertTrue(s.contains(String.valueOf(i)));
745		}
746		}
747
727	–
748		/**
749		* offer transfers elements across Executor tasks
750		*/
#	Line 732 | Line 752 | public class LinkedBlockingQueueTest ext
752		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
753		q.add(one);
754		q.add(two);
755	<	ExecutorService executor = Executors.newFixedThreadPool(2);
756	<	executor.execute(new CheckedRunnable() {
757	<	public void realRun() throws InterruptedException {
758	<	assertFalse(q.offer(three));
759	<	assertTrue(q.offer(three, MEDIUM_DELAY_MS, MILLISECONDS));
760	<	assertEquals(0, q.remainingCapacity());
761	<	}});
762	<
763	<	executor.execute(new CheckedRunnable() {
764	<	public void realRun() throws InterruptedException {
765	<	Thread.sleep(SMALL_DELAY_MS);
766	<	assertSame(one, q.take());
767	<	}});
768	<
769	<	joinPool(executor);
755	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
756	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
757	>	try (PoolCleaner cleaner = cleaner(executor)) {
758	>	executor.execute(new CheckedRunnable() {
759	>	public void realRun() throws InterruptedException {
760	>	assertFalse(q.offer(three));
761	>	threadsStarted.await();
762	>	assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS));
763	>	assertEquals(0, q.remainingCapacity());
764	>	}});
765	>
766	>	executor.execute(new CheckedRunnable() {
767	>	public void realRun() throws InterruptedException {
768	>	threadsStarted.await();
769	>	assertSame(one, q.take());
770	>	}});
771	>	}
772		}
773
774		/**
775	<	* poll retrieves elements across Executor threads
775	>	* timed poll retrieves elements across Executor threads
776		*/
777		public void testPollInExecutor() {
778		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
779	<	ExecutorService executor = Executors.newFixedThreadPool(2);
780	<	executor.execute(new CheckedRunnable() {
781	<	public void realRun() throws InterruptedException {
782	<	assertNull(q.poll());
783	<	assertSame(one, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
784	<	assertTrue(q.isEmpty());
785	<	}});
786	<
787	<	executor.execute(new CheckedRunnable() {
788	<	public void realRun() throws InterruptedException {
789	<	Thread.sleep(SMALL_DELAY_MS);
790	<	q.put(one);
791	<	}});
792	<
793	<	joinPool(executor);
779	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
780	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
781	>	try (PoolCleaner cleaner = cleaner(executor)) {
782	>	executor.execute(new CheckedRunnable() {
783	>	public void realRun() throws InterruptedException {
784	>	assertNull(q.poll());
785	>	threadsStarted.await();
786	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
787	>	checkEmpty(q);
788	>	}});
789	>
790	>	executor.execute(new CheckedRunnable() {
791	>	public void realRun() throws InterruptedException {
792	>	threadsStarted.await();
793	>	q.put(one);
794	>	}});
795	>	}
796		}
797
798		/**
799	<	* A deserialized serialized queue has same elements in same order
799	>	* A deserialized/reserialized queue has same elements in same order
800		*/
801		public void testSerialization() throws Exception {
802	<	LinkedBlockingQueue q = populatedQueue(SIZE);
803	<
780	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
781	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
782	<	out.writeObject(q);
783	<	out.close();
784	<
785	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
786	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
787	<	LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject();
788	<	assertEquals(q.size(), r.size());
789	<	while (!q.isEmpty())
790	<	assertEquals(q.remove(), r.remove());
791	<	}
792	<
793	<	/**
794	<	* drainTo(null) throws NPE
795	<	*/
796	<	public void testDrainToNull() {
797	<	LinkedBlockingQueue q = populatedQueue(SIZE);
798	<	try {
799	<	q.drainTo(null);
800	<	shouldThrow();
801	<	} catch (NullPointerException success) {}
802	<	}
802	>	Queue x = populatedQueue(SIZE);
803	>	Queue y = serialClone(x);
804
805	<	/**
806	<	* drainTo(this) throws IAE
807	<	*/
808	<	public void testDrainToSelf() {
809	<	LinkedBlockingQueue q = populatedQueue(SIZE);
810	<	try {
811	<	q.drainTo(q);
812	<	shouldThrow();
813	<	} catch (IllegalArgumentException success) {}
805	>	assertNotSame(x, y);
806	>	assertEquals(x.size(), y.size());
807	>	assertEquals(x.toString(), y.toString());
808	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
809	>	while (!x.isEmpty()) {
810	>	assertFalse(y.isEmpty());
811	>	assertEquals(x.remove(), y.remove());
812	>	}
813	>	assertTrue(y.isEmpty());
814		}
815
816		/**
#	Line 819 | Line 820 | public class LinkedBlockingQueueTest ext
820		LinkedBlockingQueue q = populatedQueue(SIZE);
821		ArrayList l = new ArrayList();
822		q.drainTo(l);
823	<	assertEquals(q.size(), 0);
824	<	assertEquals(l.size(), SIZE);
823	>	assertEquals(0, q.size());
824	>	assertEquals(SIZE, l.size());
825		for (int i = 0; i < SIZE; ++i)
826		assertEquals(l.get(i), new Integer(i));
827		q.add(zero);
#	Line 830 | Line 831 | public class LinkedBlockingQueueTest ext
831		assertTrue(q.contains(one));
832		l.clear();
833		q.drainTo(l);
834	<	assertEquals(q.size(), 0);
835	<	assertEquals(l.size(), 2);
834	>	assertEquals(0, q.size());
835	>	assertEquals(2, l.size());
836		for (int i = 0; i < 2; ++i)
837		assertEquals(l.get(i), new Integer(i));
838		}
#	Line 843 | Line 844 | public class LinkedBlockingQueueTest ext
844		final LinkedBlockingQueue q = populatedQueue(SIZE);
845		Thread t = new Thread(new CheckedRunnable() {
846		public void realRun() throws InterruptedException {
847	<	q.put(new Integer(SIZE+1));
847	>	q.put(new Integer(SIZE + 1));
848		}});
849
850		t.start();
#	Line 857 | Line 858 | public class LinkedBlockingQueueTest ext
858		}
859
860		/**
860	–	* drainTo(null, n) throws NPE
861	–	*/
862	–	public void testDrainToNullN() {
863	–	LinkedBlockingQueue q = populatedQueue(SIZE);
864	–	try {
865	–	q.drainTo(null, 0);
866	–	shouldThrow();
867	–	} catch (NullPointerException success) {}
868	–	}
869	–
870	–	/**
871	–	* drainTo(this, n) throws IAE
872	–	*/
873	–	public void testDrainToSelfN() {
874	–	LinkedBlockingQueue q = populatedQueue(SIZE);
875	–	try {
876	–	q.drainTo(q, 0);
877	–	shouldThrow();
878	–	} catch (IllegalArgumentException success) {}
879	–	}
880	–
881	–	/**
861		* drainTo(c, n) empties first min(n, size) elements of queue into c
862		*/
863		public void testDrainToN() {
#	Line 889 | Line 868 | public class LinkedBlockingQueueTest ext
868		ArrayList l = new ArrayList();
869		q.drainTo(l, i);
870		int k = (i < SIZE) ? i : SIZE;
871	<	assertEquals(l.size(), k);
872	<	assertEquals(q.size(), SIZE-k);
871	>	assertEquals(k, l.size());
872	>	assertEquals(SIZE - k, q.size());
873		for (int j = 0; j < k; ++j)
874		assertEquals(l.get(j), new Integer(j));
875	<	while (q.poll() != null) ;
875	>	do {} while (q.poll() != null);
876	>	}
877	>	}
878	>
879	>	/**
880	>	* remove(null), contains(null) always return false
881	>	*/
882	>	public void testNeverContainsNull() {
883	>	Collection<?>[] qs = {
884	>	new LinkedBlockingQueue<Object>(),
885	>	populatedQueue(2),
886	>	};
887	>
888	>	for (Collection<?> q : qs) {
889	>	assertFalse(q.contains(null));
890	>	assertFalse(q.remove(null));
891		}
892		}
893

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