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Comparing jsr166/src/test/tck/LinkedBlockingQueueTest.java (file contents):
Revision 1.24 by jsr166, Tue Dec 1 06:03:49 2009 UTC vs.
Revision 1.74 by jsr166, Sun May 14 04:02:06 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
27	+	public static class Unbounded extends BlockingQueueTest {
28	+	protected BlockingQueue emptyCollection() {
29	+	return new LinkedBlockingQueue();
30	+	}
31	+	}
32	+
33	+	public static class Bounded extends BlockingQueueTest {
34	+	protected BlockingQueue emptyCollection() {
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	<	return new TestSuite(LinkedBlockingQueueTest.class);
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(),
54	>	CollectionTest.testSuite(new Implementation()));
55		}
56
25	–
57		/**
58	<	* Create a queue of given size containing consecutive
59	<	* Integers 0 ... n.
60	<	*/
61	<	private LinkedBlockingQueue populatedQueue(int n) {
62	<	LinkedBlockingQueue q = new LinkedBlockingQueue(n);
58	>	* Returns a new queue of given size containing consecutive
59	>	* Integers 0 ... n - 1.
60	>	*/
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 48 | 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];
76	<	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];
87	<	for (int i = 0; i < SIZE-1; ++i)
88	<	ints[i] = new Integer(i);
89	<	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
124	>	new LinkedBlockingQueue(elements);
125		shouldThrow();
126		} catch (NullPointerException success) {}
127		}
#	Line 122 | 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		/**
139	–	* offer(null) throws NPE
140	–	*/
141	–	public void testOfferNull() {
142	–	try {
143	–	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
144	–	q.offer(null);
145	–	shouldThrow();
146	–	} catch (NullPointerException success) {}
147	–	}
148	–
149	–	/**
150	–	* add(null) throws NPE
151	–	*/
152	–	public void testAddNull() {
153	–	try {
154	–	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
155	–	q.add(null);
156	–	shouldThrow();
157	–	} catch (NullPointerException success) {}
158	–	}
159	–
160	–	/**
174		* Offer succeeds if not full; fails if full
175		*/
176		public void testOffer() {
#	Line 167 | 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 {
174	–	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
175	–	for (int i = 0; i < SIZE; ++i) {
176	–	assertTrue(q.add(new Integer(i)));
177	–	}
178	–	assertEquals(0, q.remainingCapacity());
191		q.add(new Integer(SIZE));
192		shouldThrow();
193		} catch (IllegalStateException success) {}
194		}
195
196		/**
197	<	* addAll(null) throws NPE
186	<	*/
187	<	public void testAddAll1() {
188	<	try {
189	<	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
190	<	q.addAll(null);
191	<	shouldThrow();
192	<	} catch (NullPointerException success) {}
193	<	}
194	<
195	<	/**
196	<	* addAll(this) throws IAE
197	>	* addAll(this) throws IllegalArgumentException
198		*/
199		public void testAddAllSelf() {
200	+	LinkedBlockingQueue q = populatedQueue(SIZE);
201		try {
200	–	LinkedBlockingQueue q = populatedQueue(SIZE);
202		q.addAll(q);
203		shouldThrow();
204		} catch (IllegalArgumentException success) {}
205		}
206
207		/**
207	–	* addAll of a collection with null elements throws NPE
208	–	*/
209	–	public void testAddAll2() {
210	–	try {
211	–	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
212	–	Integer[] ints = new Integer[SIZE];
213	–	q.addAll(Arrays.asList(ints));
214	–	shouldThrow();
215	–	} catch (NullPointerException success) {}
216	–	}
217	–	/**
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);
224	<	Integer[] ints = new Integer[SIZE];
225	<	for (int i = 0; i < SIZE-1; ++i)
226	<	ints[i] = new Integer(i);
227	<	q.addAll(Arrays.asList(ints));
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);
237	<	Integer[] ints = new Integer[SIZE];
238	<	for (int i = 0; i < SIZE; ++i)
239	<	ints[i] = new Integer(i);
240	<	q.addAll(Arrays.asList(ints));
233	>	q.addAll(elements);
234		shouldThrow();
235		} catch (IllegalStateException success) {}
236		}
237	+
238		/**
239		* Queue contains all elements, in traversal order, of successful addAll
240		*/
#	Line 257 | Line 251 | public class LinkedBlockingQueueTest ext
251		}
252
253		/**
260	–	* put(null) throws NPE
261	–	*/
262	–	public void testPutNull() throws InterruptedException {
263	–	try {
264	–	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
265	–	q.put(null);
266	–	shouldThrow();
267	–	} catch (NullPointerException success) {}
268	–	}
269	–
270	–	/**
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 285 | 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);
326	<	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	>	long startTime = System.nanoTime();
354	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
355	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
356	>	pleaseInterrupt.countDown();
357		try {
358	<	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
358	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
359		shouldThrow();
360		} catch (InterruptedException success) {}
361	+	assertFalse(Thread.interrupted());
362		}});
363
364	<	t.start();
365	<	Thread.sleep(SMALL_DELAY_MS);
364	>	await(pleaseInterrupt);
365	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
366		t.interrupt();
367	<	t.join();
367	>	awaitTermination(t);
368		}
369
370		/**
#	Line 364 | Line 378 | public class LinkedBlockingQueueTest ext
378		}
379
380		/**
367	–	* take blocks interruptibly when empty
368	–	*/
369	–	public void testTakeFromEmpty() throws InterruptedException {
370	–	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
371	–	Thread t = new ThreadShouldThrow(InterruptedException.class) {
372	–	public void realRun() throws InterruptedException {
373	–	q.take();
374	–	}};
375	–
376	–	t.start();
377	–	Thread.sleep(SHORT_DELAY_MS);
378	–	t.interrupt();
379	–	t.join();
380	–	}
381	–
382	–	/**
381		* Take removes existing elements until empty, then blocks interruptibly
382		*/
383		public void testBlockingTake() throws InterruptedException {
384	<	final LinkedBlockingQueue q = populatedQueue(SIZE);
385	<	Thread t = new Thread(new CheckedRunnable() {
384	>	final BlockingQueue q = populatedQueue(SIZE);
385	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
386	>	Thread t = newStartedThread(new CheckedRunnable() {
387		public void realRun() throws InterruptedException {
388	<	for (int i = 0; i < SIZE; ++i) {
389	<	assertEquals(i, q.take());
390	<	}
388	>	for (int i = 0; i < SIZE; i++) assertEquals(i, q.take());
389	>
390	>	Thread.currentThread().interrupt();
391		try {
392		q.take();
393		shouldThrow();
394		} catch (InterruptedException success) {}
395	+	assertFalse(Thread.interrupted());
396	+
397	+	pleaseInterrupt.countDown();
398	+	try {
399	+	q.take();
400	+	shouldThrow();
401	+	} catch (InterruptedException success) {}
402	+	assertFalse(Thread.interrupted());
403		}});
404
405	<	t.start();
406	<	Thread.sleep(SHORT_DELAY_MS);
405	>	await(pleaseInterrupt);
406	>	assertThreadBlocks(t, Thread.State.WAITING);
407		t.interrupt();
408	<	t.join();
408	>	awaitTermination(t);
409		}
410
411		/**
#	Line 413 | Line 420 | public class LinkedBlockingQueueTest ext
420		}
421
422		/**
423	<	* timed pool with zero timeout succeeds when non-empty, else times out
423	>	* timed poll with zero timeout succeeds when non-empty, else times out
424		*/
425		public void testTimedPoll0() throws InterruptedException {
426		LinkedBlockingQueue q = populatedQueue(SIZE);
#	Line 424 | Line 431 | public class LinkedBlockingQueueTest ext
431		}
432
433		/**
434	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
434	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
435		*/
436		public void testTimedPoll() throws InterruptedException {
437	<	LinkedBlockingQueue q = populatedQueue(SIZE);
437	>	LinkedBlockingQueue<Integer> q = populatedQueue(SIZE);
438		for (int i = 0; i < SIZE; ++i) {
439	<	assertEquals(i, q.poll(SHORT_DELAY_MS, MILLISECONDS));
440	<	}
441	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
439	>	long startTime = System.nanoTime();
440	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
441	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
442	>	}
443	>	long startTime = System.nanoTime();
444	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
445	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
446	>	checkEmpty(q);
447		}
448
449		/**
#	Line 439 | Line 451 | public class LinkedBlockingQueueTest ext
451		* returning timeout status
452		*/
453		public void testInterruptedTimedPoll() throws InterruptedException {
454	<	Thread t = new Thread(new CheckedRunnable() {
455	<	public void realRun() throws InterruptedException {
456	<	LinkedBlockingQueue q = populatedQueue(SIZE);
457	<	for (int i = 0; i < SIZE; ++i) {
458	<	assertEquals(i, q.poll(SHORT_DELAY_MS, MILLISECONDS));
459	<	}
454	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
455	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
456	>	Thread t = newStartedThread(new CheckedRunnable() {
457	>	public void realRun() throws InterruptedException {
458	>	long startTime = System.nanoTime();
459	>	for (int i = 0; i < SIZE; i++)
460	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
461	>
462	>	Thread.currentThread().interrupt();
463		try {
464	<	q.poll(SMALL_DELAY_MS, MILLISECONDS);
464	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
465		shouldThrow();
466		} catch (InterruptedException success) {}
467	<	}});
467	>	assertFalse(Thread.interrupted());
468
469	<	t.start();
455	<	Thread.sleep(SHORT_DELAY_MS);
456	<	t.interrupt();
457	<	t.join();
458	<	}
459	<
460	<	/**
461	<	*  timed poll before a delayed offer fails; after offer succeeds;
462	<	*  on interruption throws
463	<	*/
464	<	public void testTimedPollWithOffer() throws InterruptedException {
465	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
466	<	Thread t = new Thread(new CheckedRunnable() {
467	<	public void realRun() throws InterruptedException {
468	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
469	<	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
469	>	pleaseInterrupt.countDown();
470		try {
471		q.poll(LONG_DELAY_MS, MILLISECONDS);
472		shouldThrow();
473		} catch (InterruptedException success) {}
474	+	assertFalse(Thread.interrupted());
475	+
476	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
477		}});
478
479	<	t.start();
480	<	Thread.sleep(SMALL_DELAY_MS);
478	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
479	>	await(pleaseInterrupt);
480	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
481		t.interrupt();
482	<	t.join();
482	>	awaitTermination(t);
483	>	checkEmpty(q);
484		}
485
486		/**
#	Line 524 | Line 527 | public class LinkedBlockingQueueTest ext
527		}
528
529		/**
527	–	* remove(x) removes x and returns true if present
528	–	*/
529	–	public void testRemoveElement() {
530	–	LinkedBlockingQueue q = populatedQueue(SIZE);
531	–	for (int i = 1; i < SIZE; i+=2) {
532	–	assertTrue(q.remove(new Integer(i)));
533	–	}
534	–	for (int i = 0; i < SIZE; i+=2) {
535	–	assertTrue(q.remove(new Integer(i)));
536	–	assertFalse(q.remove(new Integer(i+1)));
537	–	}
538	–	assertTrue(q.isEmpty());
539	–	}
540	–
541	–	/**
530		* An add following remove(x) succeeds
531		*/
532		public void testRemoveElementAndAdd() throws InterruptedException {
#	Line 548 | Line 536 | public class LinkedBlockingQueueTest ext
536		assertTrue(q.remove(new Integer(1)));
537		assertTrue(q.remove(new Integer(2)));
538		assertTrue(q.add(new Integer(3)));
539	<	assertTrue(q.take() != null);
539	>	assertNotNull(q.take());
540		}
541
542		/**
#	Line 607 | Line 595 | public class LinkedBlockingQueueTest ext
595		assertTrue(changed);
596
597		assertTrue(q.containsAll(p));
598	<	assertEquals(SIZE-i, q.size());
598	>	assertEquals(SIZE - i, q.size());
599		p.remove();
600		}
601		}
#	Line 620 | Line 608 | public class LinkedBlockingQueueTest ext
608		LinkedBlockingQueue q = populatedQueue(SIZE);
609		LinkedBlockingQueue p = populatedQueue(i);
610		assertTrue(q.removeAll(p));
611	<	assertEquals(SIZE-i, q.size());
611	>	assertEquals(SIZE - i, q.size());
612		for (int j = 0; j < i; ++j) {
613	<	Integer I = (Integer)(p.remove());
614	<	assertFalse(q.contains(I));
613	>	Integer x = (Integer)(p.remove());
614	>	assertFalse(q.contains(x));
615		}
616		}
617		}
618
619		/**
620	<	* toArray contains all elements
620	>	* toArray contains all elements in FIFO order
621		*/
622	<	public void testToArray() throws InterruptedException {
622	>	public void testToArray() {
623		LinkedBlockingQueue q = populatedQueue(SIZE);
624		Object[] o = q.toArray();
625		for (int i = 0; i < o.length; i++)
626	<	assertEquals(o[i], q.take());
626	>	assertSame(o[i], q.poll());
627		}
628
629		/**
630	<	* toArray(a) contains all elements
630	>	* toArray(a) contains all elements in FIFO order
631		*/
632		public void testToArray2() throws InterruptedException {
633	<	LinkedBlockingQueue q = populatedQueue(SIZE);
633	>	LinkedBlockingQueue<Integer> q = populatedQueue(SIZE);
634		Integer[] ints = new Integer[SIZE];
635	<	ints = (Integer[])q.toArray(ints);
635	>	Integer[] array = q.toArray(ints);
636	>	assertSame(ints, array);
637		for (int i = 0; i < ints.length; i++)
638	<	assertEquals(ints[i], q.take());
638	>	assertSame(ints[i], q.poll());
639		}
640
641		/**
642	<	* toArray(null) throws NPE
654	<	*/
655	<	public void testToArray_BadArg() {
656	<	LinkedBlockingQueue q = populatedQueue(SIZE);
657	<	try {
658	<	Object o[] = q.toArray(null);
659	<	shouldThrow();
660	<	} catch (NullPointerException success) {}
661	<	}
662	<
663	<	/**
664	<	* toArray with incompatible array type throws CCE
642	>	* toArray(incompatible array type) throws ArrayStoreException
643		*/
644		public void testToArray1_BadArg() {
645		LinkedBlockingQueue q = populatedQueue(SIZE);
646		try {
647	<	Object o[] = q.toArray(new String[10]);
647	>	q.toArray(new String[10]);
648		shouldThrow();
649		} catch (ArrayStoreException success) {}
650		}
651
674	–
652		/**
653		* iterator iterates through all elements
654		*/
655		public void testIterator() throws InterruptedException {
656		LinkedBlockingQueue q = populatedQueue(SIZE);
657		Iterator it = q.iterator();
658	<	while (it.hasNext()) {
658	>	int i;
659	>	for (i = 0; it.hasNext(); i++)
660	>	assertTrue(q.contains(it.next()));
661	>	assertEquals(i, SIZE);
662	>	assertIteratorExhausted(it);
663	>
664	>	it = q.iterator();
665	>	for (i = 0; it.hasNext(); i++)
666		assertEquals(it.next(), q.take());
667	<	}
667	>	assertEquals(i, SIZE);
668	>	assertIteratorExhausted(it);
669	>	}
670	>
671	>	/**
672	>	* iterator of empty collection has no elements
673	>	*/
674	>	public void testEmptyIterator() {
675	>	assertIteratorExhausted(new LinkedBlockingQueue().iterator());
676		}
677
678		/**
679		* iterator.remove removes current element
680		*/
681	<	public void testIteratorRemove () {
681	>	public void testIteratorRemove() {
682		final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
683		q.add(two);
684		q.add(one);
#	Line 697 | Line 689 | public class LinkedBlockingQueueTest ext
689		it.remove();
690
691		it = q.iterator();
692	<	assertEquals(it.next(), one);
693	<	assertEquals(it.next(), three);
692	>	assertSame(it.next(), one);
693	>	assertSame(it.next(), three);
694		assertFalse(it.hasNext());
695		}
696
705	–
697		/**
698		* iterator ordering is FIFO
699		*/
#	Line 722 | Line 713 | public class LinkedBlockingQueueTest ext
713		/**
714		* Modifications do not cause iterators to fail
715		*/
716	<	public void testWeaklyConsistentIteration () {
716	>	public void testWeaklyConsistentIteration() {
717		final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
718		q.add(one);
719		q.add(two);
#	Line 734 | Line 725 | public class LinkedBlockingQueueTest ext
725		assertEquals(0, q.size());
726		}
727
737	–
728		/**
729		* toString contains toStrings of elements
730		*/
#	Line 742 | Line 732 | public class LinkedBlockingQueueTest ext
732		LinkedBlockingQueue q = populatedQueue(SIZE);
733		String s = q.toString();
734		for (int i = 0; i < SIZE; ++i) {
735	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
735	>	assertTrue(s.contains(String.valueOf(i)));
736		}
737		}
738
749	–
739		/**
740		* offer transfers elements across Executor tasks
741		*/
#	Line 754 | Line 743 | public class LinkedBlockingQueueTest ext
743		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
744		q.add(one);
745		q.add(two);
746	<	ExecutorService executor = Executors.newFixedThreadPool(2);
747	<	executor.execute(new CheckedRunnable() {
748	<	public void realRun() throws InterruptedException {
749	<	assertFalse(q.offer(three));
750	<	assertTrue(q.offer(three, MEDIUM_DELAY_MS, MILLISECONDS));
751	<	assertEquals(0, q.remainingCapacity());
752	<	}});
753	<
754	<	executor.execute(new CheckedRunnable() {
755	<	public void realRun() throws InterruptedException {
756	<	Thread.sleep(SMALL_DELAY_MS);
757	<	assertSame(one, q.take());
758	<	}});
759	<
760	<	joinPool(executor);
746	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
747	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
748	>	try (PoolCleaner cleaner = cleaner(executor)) {
749	>	executor.execute(new CheckedRunnable() {
750	>	public void realRun() throws InterruptedException {
751	>	assertFalse(q.offer(three));
752	>	threadsStarted.await();
753	>	assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS));
754	>	assertEquals(0, q.remainingCapacity());
755	>	}});
756	>
757	>	executor.execute(new CheckedRunnable() {
758	>	public void realRun() throws InterruptedException {
759	>	threadsStarted.await();
760	>	assertSame(one, q.take());
761	>	}});
762	>	}
763		}
764
765		/**
766	<	* poll retrieves elements across Executor threads
766	>	* timed poll retrieves elements across Executor threads
767		*/
768		public void testPollInExecutor() {
769		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
770	<	ExecutorService executor = Executors.newFixedThreadPool(2);
771	<	executor.execute(new CheckedRunnable() {
772	<	public void realRun() throws InterruptedException {
773	<	assertNull(q.poll());
774	<	assertSame(one, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
775	<	assertTrue(q.isEmpty());
776	<	}});
777	<
778	<	executor.execute(new CheckedRunnable() {
779	<	public void realRun() throws InterruptedException {
780	<	Thread.sleep(SMALL_DELAY_MS);
781	<	q.put(one);
782	<	}});
783	<
784	<	joinPool(executor);
770	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
771	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
772	>	try (PoolCleaner cleaner = cleaner(executor)) {
773	>	executor.execute(new CheckedRunnable() {
774	>	public void realRun() throws InterruptedException {
775	>	assertNull(q.poll());
776	>	threadsStarted.await();
777	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
778	>	checkEmpty(q);
779	>	}});
780	>
781	>	executor.execute(new CheckedRunnable() {
782	>	public void realRun() throws InterruptedException {
783	>	threadsStarted.await();
784	>	q.put(one);
785	>	}});
786	>	}
787		}
788
789		/**
790		* A deserialized serialized queue has same elements in same order
791		*/
792		public void testSerialization() throws Exception {
793	<	LinkedBlockingQueue q = populatedQueue(SIZE);
794	<
802	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
803	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
804	<	out.writeObject(q);
805	<	out.close();
806	<
807	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
808	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
809	<	LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject();
810	<	assertEquals(q.size(), r.size());
811	<	while (!q.isEmpty())
812	<	assertEquals(q.remove(), r.remove());
813	<	}
793	>	Queue x = populatedQueue(SIZE);
794	>	Queue y = serialClone(x);
795
796	<	/**
797	<	* drainTo(null) throws NPE
798	<	*/
799	<	public void testDrainToNull() {
800	<	LinkedBlockingQueue q = populatedQueue(SIZE);
801	<	try {
802	<	q.drainTo(null);
803	<	shouldThrow();
804	<	} catch (NullPointerException success) {}
824	<	}
825	<
826	<	/**
827	<	* drainTo(this) throws IAE
828	<	*/
829	<	public void testDrainToSelf() {
830	<	LinkedBlockingQueue q = populatedQueue(SIZE);
831	<	try {
832	<	q.drainTo(q);
833	<	shouldThrow();
834	<	} catch (IllegalArgumentException success) {}
796	>	assertNotSame(x, y);
797	>	assertEquals(x.size(), y.size());
798	>	assertEquals(x.toString(), y.toString());
799	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
800	>	while (!x.isEmpty()) {
801	>	assertFalse(y.isEmpty());
802	>	assertEquals(x.remove(), y.remove());
803	>	}
804	>	assertTrue(y.isEmpty());
805		}
806
807		/**
#	Line 841 | Line 811 | public class LinkedBlockingQueueTest ext
811		LinkedBlockingQueue q = populatedQueue(SIZE);
812		ArrayList l = new ArrayList();
813		q.drainTo(l);
814	<	assertEquals(q.size(), 0);
815	<	assertEquals(l.size(), SIZE);
814	>	assertEquals(0, q.size());
815	>	assertEquals(SIZE, l.size());
816		for (int i = 0; i < SIZE; ++i)
817		assertEquals(l.get(i), new Integer(i));
818		q.add(zero);
#	Line 852 | Line 822 | public class LinkedBlockingQueueTest ext
822		assertTrue(q.contains(one));
823		l.clear();
824		q.drainTo(l);
825	<	assertEquals(q.size(), 0);
826	<	assertEquals(l.size(), 2);
825	>	assertEquals(0, q.size());
826	>	assertEquals(2, l.size());
827		for (int i = 0; i < 2; ++i)
828		assertEquals(l.get(i), new Integer(i));
829		}
#	Line 865 | Line 835 | public class LinkedBlockingQueueTest ext
835		final LinkedBlockingQueue q = populatedQueue(SIZE);
836		Thread t = new Thread(new CheckedRunnable() {
837		public void realRun() throws InterruptedException {
838	<	q.put(new Integer(SIZE+1));
838	>	q.put(new Integer(SIZE + 1));
839		}});
840
841		t.start();
#	Line 879 | Line 849 | public class LinkedBlockingQueueTest ext
849		}
850
851		/**
852	<	* drainTo(null, n) throws NPE
883	<	*/
884	<	public void testDrainToNullN() {
885	<	LinkedBlockingQueue q = populatedQueue(SIZE);
886	<	try {
887	<	q.drainTo(null, 0);
888	<	shouldThrow();
889	<	} catch (NullPointerException success) {}
890	<	}
891	<
892	<	/**
893	<	* drainTo(this, n) throws IAE
894	<	*/
895	<	public void testDrainToSelfN() {
896	<	LinkedBlockingQueue q = populatedQueue(SIZE);
897	<	try {
898	<	q.drainTo(q, 0);
899	<	shouldThrow();
900	<	} catch (IllegalArgumentException success) {}
901	<	}
902	<
903	<	/**
904	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
852	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
853		*/
854		public void testDrainToN() {
855		LinkedBlockingQueue q = new LinkedBlockingQueue();
#	Line 910 | Line 858 | public class LinkedBlockingQueueTest ext
858		assertTrue(q.offer(new Integer(j)));
859		ArrayList l = new ArrayList();
860		q.drainTo(l, i);
861	<	int k = (i < SIZE)? i : SIZE;
862	<	assertEquals(l.size(), k);
863	<	assertEquals(q.size(), SIZE-k);
861	>	int k = (i < SIZE) ? i : SIZE;
862	>	assertEquals(k, l.size());
863	>	assertEquals(SIZE - k, q.size());
864		for (int j = 0; j < k; ++j)
865		assertEquals(l.get(j), new Integer(j));
866	<	while (q.poll() != null) ;
866	>	do {} while (q.poll() != null);
867	>	}
868	>	}
869	>
870	>	/**
871	>	* remove(null), contains(null) always return false
872	>	*/
873	>	public void testNeverContainsNull() {
874	>	Collection<?>[] qs = {
875	>	new LinkedBlockingQueue<Object>(),
876	>	populatedQueue(2),
877	>	};
878	>
879	>	for (Collection<?> q : qs) {
880	>	assertFalse(q.contains(null));
881	>	assertFalse(q.remove(null));
882		}
883		}
884

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