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

Comparing jsr166/src/test/tck/LinkedTransferQueueTest.java (file contents):
Revision 1.7 by jsr166, Mon Aug 3 19:07:51 2009 UTC vs.
Revision 1.56 by jsr166, Wed Dec 31 19:21:20 2014 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 John Vint
6		*/
7
8	<	import java.io.BufferedInputStream;
9	<	import java.io.BufferedOutputStream;
10	<	import java.io.ByteArrayInputStream;
11	<	import java.io.ByteArrayOutputStream;
12	<	import java.io.ObjectInputStream;
13	<	import java.io.ObjectOutputStream;
8	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
9	>
10		import java.util.ArrayList;
11		import java.util.Arrays;
12	<	import java.util.ConcurrentModificationException;
12	>	import java.util.Collection;
13		import java.util.Iterator;
14	+	import java.util.List;
15		import java.util.NoSuchElementException;
16	<	import java.util.concurrent.*;
17	<	import static java.util.concurrent.TimeUnit.MILLISECONDS;
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.LinkedTransferQueue;
22	>
23		import junit.framework.Test;
22	–	import junit.framework.TestSuite;
24
25	+	@SuppressWarnings({"unchecked", "rawtypes"})
26		public class LinkedTransferQueueTest extends JSR166TestCase {
27
28	+	public static class Generic extends BlockingQueueTest {
29	+	protected BlockingQueue emptyCollection() {
30	+	return new LinkedTransferQueue();
31	+	}
32	+	}
33	+
34		public static void main(String[] args) {
35		junit.textui.TestRunner.run(suite());
36		}
37
38		public static Test suite() {
39	<	return new TestSuite(LinkedTransferQueueTest.class);
39	>	return newTestSuite(LinkedTransferQueueTest.class,
40	>	new Generic().testSuite());
41		}
42
43		/**
#	Line 48 | Line 57 | public class LinkedTransferQueueTest ext
57		try {
58		new LinkedTransferQueue(null);
59		shouldThrow();
60	<	} catch (NullPointerException success) {
52	<	}
60	>	} catch (NullPointerException success) {}
61		}
62
63		/**
#	Line 57 | Line 65 | public class LinkedTransferQueueTest ext
65		* NullPointerException
66		*/
67		public void testConstructor3() {
68	+	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
69		try {
70	<	Integer[] ints = new Integer[SIZE];
62	<	new LinkedTransferQueue(Arrays.asList(ints));
70	>	new LinkedTransferQueue(elements);
71		shouldThrow();
72	<	} catch (NullPointerException success) {
65	<	}
72	>	} catch (NullPointerException success) {}
73		}
74
75		/**
#	Line 70 | Line 77 | public class LinkedTransferQueueTest ext
77		* throws NullPointerException
78		*/
79		public void testConstructor4() {
80	+	Integer[] ints = new Integer[SIZE];
81	+	for (int i = 0; i < SIZE-1; ++i)
82	+	ints[i] = i;
83	+	Collection<Integer> elements = Arrays.asList(ints);
84		try {
85	<	Integer[] ints = new Integer[SIZE];
75	<	for (int i = 0; i < SIZE - 1; ++i) {
76	<	ints[i] = i;
77	<	}
78	<	new LinkedTransferQueue(Arrays.asList(ints));
85	>	new LinkedTransferQueue(elements);
86		shouldThrow();
87	<	} catch (NullPointerException success) {
81	<	}
87	>	} catch (NullPointerException success) {}
88		}
89
90		/**
91		* Queue contains all elements of the collection it is initialized by
92		*/
93		public void testConstructor5() {
94	<	try {
95	<	Integer[] ints = new Integer[SIZE];
96	<	for (int i = 0; i < SIZE; ++i) {
97	<	ints[i] = i;
98	<	}
99	<	LinkedTransferQueue q
100	<	= new LinkedTransferQueue(Arrays.asList(ints));
101	<	for (int i = 0; i < SIZE; ++i) {
102	<	assertEquals(ints[i], q.poll());
103	<	}
104	<	} finally {
94	>	Integer[] ints = new Integer[SIZE];
95	>	for (int i = 0; i < SIZE; ++i) {
96	>	ints[i] = i;
97	>	}
98	>	List intList = Arrays.asList(ints);
99	>	LinkedTransferQueue q
100	>	= new LinkedTransferQueue(intList);
101	>	assertEquals(q.size(), intList.size());
102	>	assertEquals(q.toString(), intList.toString());
103	>	assertTrue(Arrays.equals(q.toArray(),
104	>	intList.toArray()));
105	>	assertTrue(Arrays.equals(q.toArray(new Object[0]),
106	>	intList.toArray(new Object[0])));
107	>	assertTrue(Arrays.equals(q.toArray(new Object[SIZE]),
108	>	intList.toArray(new Object[SIZE])));
109	>	for (int i = 0; i < SIZE; ++i) {
110	>	assertEquals(ints[i], q.poll());
111		}
112		}
113
114		/**
115	<	* Remaining capacity never decrease nor increase on add or remove
115	>	* remainingCapacity() always returns Integer.MAX_VALUE
116		*/
117		public void testRemainingCapacity() {
118		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
#	Line 117 | Line 129 | public class LinkedTransferQueueTest ext
129		}
130
131		/**
120	–	* offer(null) throws NullPointerException
121	–	*/
122	–	public void testOfferNull() {
123	–	try {
124	–	LinkedTransferQueue q = new LinkedTransferQueue();
125	–	q.offer(null);
126	–	shouldThrow();
127	–	} catch (NullPointerException success) {
128	–	}
129	–	}
130	–
131	–	/**
132	–	* add(null) throws NullPointerException
133	–	*/
134	–	public void testAddNull() {
135	–	try {
136	–	LinkedTransferQueue q = new LinkedTransferQueue();
137	–	q.add(null);
138	–	shouldThrow();
139	–	} catch (NullPointerException success) {
140	–	}
141	–	}
142	–
143	–	/**
144	–	* addAll(null) throws NullPointerException
145	–	*/
146	–	public void testAddAll1() {
147	–	try {
148	–	LinkedTransferQueue q = new LinkedTransferQueue();
149	–	q.addAll(null);
150	–	shouldThrow();
151	–	} catch (NullPointerException success) {
152	–	}
153	–	}
154	–
155	–	/**
132		* addAll(this) throws IllegalArgumentException
133		*/
134		public void testAddAllSelf() {
#	Line 160 | Line 136 | public class LinkedTransferQueueTest ext
136		LinkedTransferQueue q = populatedQueue(SIZE);
137		q.addAll(q);
138		shouldThrow();
139	<	} catch (IllegalArgumentException success) {
164	<	}
165	<	}
166	<
167	<	/**
168	<	* addAll of a collection with null elements throws NullPointerException
169	<	*/
170	<	public void testAddAll2() {
171	<	try {
172	<	LinkedTransferQueue q = new LinkedTransferQueue();
173	<	Integer[] ints = new Integer[SIZE];
174	<	q.addAll(Arrays.asList(ints));
175	<	shouldThrow();
176	<	} catch (NullPointerException success) {
177	<	}
139	>	} catch (IllegalArgumentException success) {}
140		}
141
142		/**
#	Line 190 | Line 152 | public class LinkedTransferQueueTest ext
152		}
153		q.addAll(Arrays.asList(ints));
154		shouldThrow();
155	<	} catch (NullPointerException success) {
194	<	}
155	>	} catch (NullPointerException success) {}
156		}
157
158		/**
#	Line 212 | Line 173 | public class LinkedTransferQueueTest ext
173		}
174
175		/**
215	–	* put(null) throws NullPointerException
216	–	*/
217	–	public void testPutNull() throws InterruptedException {
218	–	try {
219	–	LinkedTransferQueue q = new LinkedTransferQueue();
220	–	q.put(null);
221	–	shouldThrow();
222	–	} catch (NullPointerException success) {}
223	–	}
224	–
225	–	/**
176		* all elements successfully put are contained
177		*/
178		public void testPut() {
179		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
180		for (int i = 0; i < SIZE; ++i) {
181	+	assertEquals(i, q.size());
182		q.put(i);
183		assertTrue(q.contains(i));
184		}
234	–	assertEquals(q.size(), SIZE);
185		}
186
187		/**
#	Line 245 | Line 195 | public class LinkedTransferQueueTest ext
195		}
196
197		/**
198	<	* take blocks interruptibly when empty
249	<	*/
250	<	public void testTakeFromEmpty() throws InterruptedException {
251	<	final LinkedTransferQueue q = new LinkedTransferQueue();
252	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
253	<	void realRun() throws InterruptedException {
254	<	q.take();
255	<	}});
256	<	t.start();
257	<	Thread.sleep(SHORT_DELAY_MS);
258	<	t.interrupt();
259	<	t.join();
260	<	}
261	<
262	<	/**
263	<	* Take removes existing elements until empty, then blocks interruptibly
198	>	* take removes existing elements until empty, then blocks interruptibly
199		*/
200		public void testBlockingTake() throws InterruptedException {
201	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
202	<	void realRun() throws InterruptedException {
203	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
201	>	final BlockingQueue q = populatedQueue(SIZE);
202	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
203	>	Thread t = newStartedThread(new CheckedRunnable() {
204	>	public void realRun() throws InterruptedException {
205		for (int i = 0; i < SIZE; ++i) {
206	<	threadAssertEquals(i, (int) q.take());
206	>	assertEquals(i, q.take());
207		}
208	<	q.take();
208	>
209	>	Thread.currentThread().interrupt();
210	>	try {
211	>	q.take();
212	>	shouldThrow();
213	>	} catch (InterruptedException success) {}
214	>	assertFalse(Thread.interrupted());
215	>
216	>	pleaseInterrupt.countDown();
217	>	try {
218	>	q.take();
219	>	shouldThrow();
220	>	} catch (InterruptedException success) {}
221	>	assertFalse(Thread.interrupted());
222		}});
223	<	t.start();
224	<	Thread.sleep(SHORT_DELAY_MS);
223	>
224	>	await(pleaseInterrupt);
225	>	assertThreadStaysAlive(t);
226		t.interrupt();
227	<	t.join();
227	>	awaitTermination(t);
228		}
229
230		/**
231		* poll succeeds unless empty
232		*/
233	<	public void testPoll() {
233	>	public void testPoll() throws InterruptedException {
234		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
235		for (int i = 0; i < SIZE; ++i) {
236		assertEquals(i, (int) q.poll());
237		}
238		assertNull(q.poll());
239	+	checkEmpty(q);
240		}
241
242		/**
243	<	* timed pool with zero timeout succeeds when non-empty, else times out
243	>	* timed poll with zero timeout succeeds when non-empty, else times out
244		*/
245		public void testTimedPoll0() throws InterruptedException {
246		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
#	Line 297 | Line 248 | public class LinkedTransferQueueTest ext
248		assertEquals(i, (int) q.poll(0, MILLISECONDS));
249		}
250		assertNull(q.poll(0, MILLISECONDS));
251	+	checkEmpty(q);
252		}
253
254		/**
255	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
255	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
256		*/
257		public void testTimedPoll() throws InterruptedException {
258		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
259		for (int i = 0; i < SIZE; ++i) {
260	<	assertEquals(i, (int) q.poll(SHORT_DELAY_MS, MILLISECONDS));
261	<	}
262	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
260	>	long startTime = System.nanoTime();
261	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
262	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
263	>	}
264	>	long startTime = System.nanoTime();
265	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
266	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
267	>	checkEmpty(q);
268		}
269
270		/**
#	Line 315 | Line 272 | public class LinkedTransferQueueTest ext
272		* returning timeout status
273		*/
274		public void testInterruptedTimedPoll() throws InterruptedException {
275	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
276	<	void realRun() throws InterruptedException {
277	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
275	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
276	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
277	>	Thread t = newStartedThread(new CheckedRunnable() {
278	>	public void realRun() throws InterruptedException {
279		for (int i = 0; i < SIZE; ++i) {
280	<	threadAssertEquals(i, (int) q.poll(SHORT_DELAY_MS,
281	<	MILLISECONDS));
280	>	long t0 = System.nanoTime();
281	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
282	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
283	>	}
284	>	long t0 = System.nanoTime();
285	>	aboutToWait.countDown();
286	>	try {
287	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
288	>	shouldThrow();
289	>	} catch (InterruptedException success) {
290	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
291		}
325	–	q.poll(SHORT_DELAY_MS, MILLISECONDS);
292		}});
293	<	t.start();
294	<	Thread.sleep(SHORT_DELAY_MS);
293	>
294	>	aboutToWait.await();
295	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
296		t.interrupt();
297	<	t.join();
297	>	awaitTermination(t, MEDIUM_DELAY_MS);
298	>	checkEmpty(q);
299		}
300
301		/**
302	<	* timed poll before a delayed offer fails; after offer succeeds;
303	<	* on interruption throws
302	>	* timed poll after thread interrupted throws InterruptedException
303	>	* instead of returning timeout status
304		*/
305	<	public void testTimedPollWithOffer() throws InterruptedException {
306	<	final LinkedTransferQueue q = new LinkedTransferQueue();
307	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
308	<	void realRun() throws InterruptedException {
309	<	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
310	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
311	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
305	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
306	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
307	>	Thread t = newStartedThread(new CheckedRunnable() {
308	>	public void realRun() throws InterruptedException {
309	>	Thread.currentThread().interrupt();
310	>	for (int i = 0; i < SIZE; ++i) {
311	>	long t0 = System.nanoTime();
312	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
313	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
314	>	}
315	>	try {
316	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
317	>	shouldThrow();
318	>	} catch (InterruptedException success) {}
319		}});
320	<	t.start();
321	<	Thread.sleep(SMALL_DELAY_MS);
322	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
348	<	t.interrupt();
349	<	t.join();
320	>
321	>	awaitTermination(t, MEDIUM_DELAY_MS);
322	>	checkEmpty(q);
323		}
324
325		/**
326		* peek returns next element, or null if empty
327		*/
328	<	public void testPeek() {
328	>	public void testPeek() throws InterruptedException {
329		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
330		for (int i = 0; i < SIZE; ++i) {
331		assertEquals(i, (int) q.peek());
#	Line 361 | Line 334 | public class LinkedTransferQueueTest ext
334		i != (int) q.peek());
335		}
336		assertNull(q.peek());
337	+	checkEmpty(q);
338		}
339
340		/**
341		* element returns next element, or throws NoSuchElementException if empty
342		*/
343	<	public void testElement() {
343	>	public void testElement() throws InterruptedException {
344		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
345		for (int i = 0; i < SIZE; ++i) {
346		assertEquals(i, (int) q.element());
#	Line 375 | Line 349 | public class LinkedTransferQueueTest ext
349		try {
350		q.element();
351		shouldThrow();
352	<	} catch (NoSuchElementException success) {
353	<	}
352	>	} catch (NoSuchElementException success) {}
353	>	checkEmpty(q);
354		}
355
356		/**
357		* remove removes next element, or throws NoSuchElementException if empty
358		*/
359	<	public void testRemove() {
359	>	public void testRemove() throws InterruptedException {
360		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
361		for (int i = 0; i < SIZE; ++i) {
362		assertEquals(i, (int) q.remove());
#	Line 390 | Line 364 | public class LinkedTransferQueueTest ext
364		try {
365		q.remove();
366		shouldThrow();
367	<	} catch (NoSuchElementException success) {
368	<	}
395	<	}
396	<
397	<	/**
398	<	* remove(x) removes x and returns true if present
399	<	*/
400	<	public void testRemoveElement() {
401	<	LinkedTransferQueue q = populatedQueue(SIZE);
402	<	for (int i = 1; i < SIZE; i += 2) {
403	<	assertTrue(q.remove(i));
404	<	}
405	<	for (int i = 0; i < SIZE; i += 2) {
406	<	assertTrue(q.remove(i));
407	<	assertFalse(q.remove(i + 1));
408	<	}
409	<	assertTrue(q.isEmpty());
367	>	} catch (NoSuchElementException success) {}
368	>	checkEmpty(q);
369		}
370
371		/**
#	Line 419 | Line 378 | public class LinkedTransferQueueTest ext
378		assertTrue(q.remove(one));
379		assertTrue(q.remove(two));
380		assertTrue(q.add(three));
381	<	assertTrue(q.take() != null);
381	>	assertSame(q.take(), three);
382		}
383
384		/**
#	Line 437 | Line 396 | public class LinkedTransferQueueTest ext
396		/**
397		* clear removes all elements
398		*/
399	<	public void testClear() {
399	>	public void testClear() throws InterruptedException {
400		LinkedTransferQueue q = populatedQueue(SIZE);
401		q.clear();
402	<	assertTrue(q.isEmpty());
444	<	assertEquals(0, q.size());
402	>	checkEmpty(q);
403		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
404		q.add(one);
405		assertFalse(q.isEmpty());
406	+	assertEquals(1, q.size());
407		assertTrue(q.contains(one));
408		q.clear();
409	<	assertTrue(q.isEmpty());
409	>	checkEmpty(q);
410		}
411
412		/**
#	Line 501 | Line 460 | public class LinkedTransferQueueTest ext
460		}
461
462		/**
463	<	* toArray contains all elements
463	>	* toArray() contains all elements in FIFO order
464		*/
465	<	public void testToArray() throws InterruptedException {
465	>	public void testToArray() {
466		LinkedTransferQueue q = populatedQueue(SIZE);
467		Object[] o = q.toArray();
468		for (int i = 0; i < o.length; i++) {
469	<	assertEquals(o[i], q.take());
469	>	assertSame(o[i], q.poll());
470		}
471		}
472
473		/**
474	<	* toArray(a) contains all elements
474	>	* toArray(a) contains all elements in FIFO order
475		*/
476	<	public void testToArray2() throws InterruptedException {
476	>	public void testToArray2() {
477		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
478		Integer[] ints = new Integer[SIZE];
479	<	ints = q.toArray(ints);
479	>	Integer[] array = q.toArray(ints);
480	>	assertSame(ints, array);
481		for (int i = 0; i < ints.length; i++) {
482	<	assertEquals(ints[i], q.take());
523	<	}
524	<	}
525	<
526	<	/**
527	<	* toArray(null) throws NullPointerException
528	<	*/
529	<	public void testToArray_BadArg() {
530	<	try {
531	<	LinkedTransferQueue q = populatedQueue(SIZE);
532	<	Object o[] = q.toArray(null);
533	<	shouldThrow();
534	<	} catch (NullPointerException success) {
482	>	assertSame(ints[i], q.poll());
483		}
484		}
485
486		/**
487	<	* toArray with incompatible array type throws CCE
487	>	* toArray(incompatible array type) throws ArrayStoreException
488		*/
489		public void testToArray1_BadArg() {
490	+	LinkedTransferQueue q = populatedQueue(SIZE);
491		try {
492	<	LinkedTransferQueue q = populatedQueue(SIZE);
544	<	Object o[] = q.toArray(new String[10]);
492	>	q.toArray(new String[10]);
493		shouldThrow();
494	<	} catch (ArrayStoreException success) {
547	<	}
494	>	} catch (ArrayStoreException success) {}
495		}
496
497		/**
#	Line 553 | Line 500 | public class LinkedTransferQueueTest ext
500		public void testIterator() throws InterruptedException {
501		LinkedTransferQueue q = populatedQueue(SIZE);
502		Iterator it = q.iterator();
503	+	int i = 0;
504		while (it.hasNext()) {
505	<	assertEquals(it.next(), q.take());
505	>	assertEquals(it.next(), i++);
506		}
507	+	assertEquals(i, SIZE);
508		}
509
510		/**
511	<	* iterator.remove removes current element
511	>	* iterator.remove() removes current element
512		*/
513		public void testIteratorRemove() {
514		final LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 572 | Line 521 | public class LinkedTransferQueueTest ext
521		it.remove();
522
523		it = q.iterator();
524	<	assertEquals(it.next(), one);
525	<	assertEquals(it.next(), three);
524	>	assertSame(it.next(), one);
525	>	assertSame(it.next(), three);
526		assertFalse(it.hasNext());
527		}
528
#	Line 617 | Line 566 | public class LinkedTransferQueueTest ext
566		LinkedTransferQueue q = populatedQueue(SIZE);
567		String s = q.toString();
568		for (int i = 0; i < SIZE; ++i) {
569	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
569	>	assertTrue(s.contains(String.valueOf(i)));
570		}
571		}
572
#	Line 626 | Line 575 | public class LinkedTransferQueueTest ext
575		*/
576		public void testOfferInExecutor() {
577		final LinkedTransferQueue q = new LinkedTransferQueue();
578	<	q.add(one);
630	<	q.add(two);
578	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
579		ExecutorService executor = Executors.newFixedThreadPool(2);
580
581		executor.execute(new CheckedRunnable() {
582	<	void realRun() {
583	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS,
584	<	MILLISECONDS));
582	>	public void realRun() throws InterruptedException {
583	>	threadsStarted.await();
584	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
585		}});
586
587		executor.execute(new CheckedRunnable() {
588	<	void realRun() throws InterruptedException {
589	<	Thread.sleep(SMALL_DELAY_MS);
590	<	threadAssertEquals(one, q.take());
588	>	public void realRun() throws InterruptedException {
589	>	threadsStarted.await();
590	>	assertSame(one, q.take());
591	>	checkEmpty(q);
592		}});
593
594		joinPool(executor);
595		}
596
597		/**
598	<	* poll retrieves elements across Executor threads
598	>	* timed poll retrieves elements across Executor threads
599		*/
600		public void testPollInExecutor() {
601		final LinkedTransferQueue q = new LinkedTransferQueue();
602	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
603		ExecutorService executor = Executors.newFixedThreadPool(2);
604
605		executor.execute(new CheckedRunnable() {
606	<	void realRun() throws InterruptedException {
607	<	threadAssertNull(q.poll());
608	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS,
609	<	MILLISECONDS));
610	<	threadAssertTrue(q.isEmpty());
606	>	public void realRun() throws InterruptedException {
607	>	assertNull(q.poll());
608	>	threadsStarted.await();
609	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
610	>	checkEmpty(q);
611		}});
612
613		executor.execute(new CheckedRunnable() {
614	<	void realRun() throws InterruptedException {
615	<	Thread.sleep(SMALL_DELAY_MS);
614	>	public void realRun() throws InterruptedException {
615	>	threadsStarted.await();
616		q.put(one);
617		}});
618
#	Line 673 | Line 623 | public class LinkedTransferQueueTest ext
623		* A deserialized serialized queue has same elements in same order
624		*/
625		public void testSerialization() throws Exception {
626	<	LinkedTransferQueue q = populatedQueue(SIZE);
627	<
678	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
679	<	ObjectOutputStream out
680	<	= new ObjectOutputStream(new BufferedOutputStream(bout));
681	<	out.writeObject(q);
682	<	out.close();
683	<
684	<	ByteArrayInputStream bin
685	<	= new ByteArrayInputStream(bout.toByteArray());
686	<	ObjectInputStream in
687	<	= new ObjectInputStream(new BufferedInputStream(bin));
688	<	LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
689	<
690	<	assertEquals(q.size(), r.size());
691	<	while (!q.isEmpty()) {
692	<	assertEquals(q.remove(), r.remove());
693	<	}
694	<	}
695	<
696	<	/**
697	<	* drainTo(null) throws NullPointerException
698	<	*/
699	<	public void testDrainToNull() {
700	<	LinkedTransferQueue q = populatedQueue(SIZE);
701	<	try {
702	<	q.drainTo(null);
703	<	shouldThrow();
704	<	} catch (NullPointerException success) {
705	<	}
706	<	}
626	>	Queue x = populatedQueue(SIZE);
627	>	Queue y = serialClone(x);
628
629	<	/**
630	<	* drainTo(this) throws IllegalArgumentException
631	<	*/
632	<	public void testDrainToSelf() {
633	<	LinkedTransferQueue q = populatedQueue(SIZE);
634	<	try {
635	<	q.drainTo(q);
715	<	shouldThrow();
716	<	} catch (IllegalArgumentException success) {
629	>	assertNotSame(y, x);
630	>	assertEquals(x.size(), y.size());
631	>	assertEquals(x.toString(), y.toString());
632	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
633	>	while (!x.isEmpty()) {
634	>	assertFalse(y.isEmpty());
635	>	assertEquals(x.remove(), y.remove());
636		}
637	+	assertTrue(y.isEmpty());
638		}
639
640		/**
#	Line 724 | Line 644 | public class LinkedTransferQueueTest ext
644		LinkedTransferQueue q = populatedQueue(SIZE);
645		ArrayList l = new ArrayList();
646		q.drainTo(l);
647	<	assertEquals(q.size(), 0);
648	<	assertEquals(l.size(), SIZE);
647	>	assertEquals(0, q.size());
648	>	assertEquals(SIZE, l.size());
649		for (int i = 0; i < SIZE; ++i) {
650	<	assertEquals(l.get(i), i);
650	>	assertEquals(i, l.get(i));
651		}
652		q.add(zero);
653		q.add(one);
#	Line 736 | Line 656 | public class LinkedTransferQueueTest ext
656		assertTrue(q.contains(one));
657		l.clear();
658		q.drainTo(l);
659	<	assertEquals(q.size(), 0);
660	<	assertEquals(l.size(), 2);
659	>	assertEquals(0, q.size());
660	>	assertEquals(2, l.size());
661		for (int i = 0; i < 2; ++i) {
662	<	assertEquals(l.get(i), i);
662	>	assertEquals(i, l.get(i));
663		}
664		}
665
666		/**
667	<	* drainTo empties full queue, unblocking a waiting put.
667	>	* drainTo(c) empties full queue, unblocking a waiting put.
668		*/
669		public void testDrainToWithActivePut() throws InterruptedException {
670		final LinkedTransferQueue q = populatedQueue(SIZE);
671	<	Thread t = new Thread(new CheckedRunnable() {
672	<	void realRun() {
671	>	Thread t = newStartedThread(new CheckedRunnable() {
672	>	public void realRun() {
673		q.put(SIZE + 1);
674		}});
755	–	t.start();
675		ArrayList l = new ArrayList();
676		q.drainTo(l);
677		assertTrue(l.size() >= SIZE);
678	<	for (int i = 0; i < SIZE; ++i) {
679	<	assertEquals(l.get(i), i);
680	<	}
762	<	t.join();
678	>	for (int i = 0; i < SIZE; ++i)
679	>	assertEquals(i, l.get(i));
680	>	awaitTermination(t, MEDIUM_DELAY_MS);
681		assertTrue(q.size() + l.size() >= SIZE);
682		}
683
684		/**
685	<	* drainTo(null, n) throws NullPointerException
768	<	*/
769	<	public void testDrainToNullN() {
770	<	LinkedTransferQueue q = populatedQueue(SIZE);
771	<	try {
772	<	q.drainTo(null, 0);
773	<	shouldThrow();
774	<	} catch (NullPointerException success) {
775	<	}
776	<	}
777	<
778	<	/**
779	<	* drainTo(this, n) throws IllegalArgumentException
780	<	*/
781	<	public void testDrainToSelfN() {
782	<	LinkedTransferQueue q = populatedQueue(SIZE);
783	<	try {
784	<	q.drainTo(q, 0);
785	<	shouldThrow();
786	<	} catch (IllegalArgumentException success) {
787	<	}
788	<	}
789	<
790	<	/**
791	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
685	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
686		*/
687		public void testDrainToN() {
688		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 799 | Line 693 | public class LinkedTransferQueueTest ext
693		ArrayList l = new ArrayList();
694		q.drainTo(l, i);
695		int k = (i < SIZE) ? i : SIZE;
696	<	assertEquals(l.size(), k);
697	<	assertEquals(q.size(), SIZE - k);
698	<	for (int j = 0; j < k; ++j) {
699	<	assertEquals(l.get(j), j);
700	<	}
807	<	while (q.poll() != null)
808	<	;
696	>	assertEquals(k, l.size());
697	>	assertEquals(SIZE - k, q.size());
698	>	for (int j = 0; j < k; ++j)
699	>	assertEquals(j, l.get(j));
700	>	do {} while (q.poll() != null);
701		}
702		}
703
704		/**
705	<	* poll and take decrement the waiting consumer count
705	>	* timed poll() or take() increments the waiting consumer count;
706	>	* offer(e) decrements the waiting consumer count
707		*/
708		public void testWaitingConsumer() throws InterruptedException {
709		final LinkedTransferQueue q = new LinkedTransferQueue();
710	<	final ConsumerObserver waiting = new ConsumerObserver();
711	<	new Thread(new CheckedRunnable() {
712	<	void realRun() {
713	<	threadAssertTrue(q.hasWaitingConsumer());
714	<	waiting.setWaitingConsumer(q.getWaitingConsumerCount());
715	<	threadAssertTrue(q.offer(new Object()));
716	<	}}).start();
717	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) != null);
718	<	assertTrue(q.getWaitingConsumerCount()
719	<	< waiting.getWaitingConsumers());
710	>	assertEquals(0, q.getWaitingConsumerCount());
711	>	assertFalse(q.hasWaitingConsumer());
712	>	final CountDownLatch threadStarted = new CountDownLatch(1);
713	>
714	>	Thread t = newStartedThread(new CheckedRunnable() {
715	>	public void realRun() throws InterruptedException {
716	>	threadStarted.countDown();
717	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
718	>	assertEquals(0, q.getWaitingConsumerCount());
719	>	assertFalse(q.hasWaitingConsumer());
720	>	}});
721	>
722	>	threadStarted.await();
723	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
724	>	assertEquals(1, q.getWaitingConsumerCount());
725	>	assertTrue(q.hasWaitingConsumer());
726	>
727	>	assertTrue(q.offer(one));
728	>	assertEquals(0, q.getWaitingConsumerCount());
729	>	assertFalse(q.hasWaitingConsumer());
730	>
731	>	awaitTermination(t, MEDIUM_DELAY_MS);
732		}
733
734		/**
#	Line 834 | Line 739 | public class LinkedTransferQueueTest ext
739		LinkedTransferQueue q = new LinkedTransferQueue();
740		q.transfer(null);
741		shouldThrow();
742	<	} catch (NullPointerException ex) {
838	<	}
742	>	} catch (NullPointerException success) {}
743		}
744
745		/**
#	Line 845 | Line 749 | public class LinkedTransferQueueTest ext
749		public void testTransfer2() throws InterruptedException {
750		final LinkedTransferQueue<Integer> q
751		= new LinkedTransferQueue<Integer>();
752	+	final CountDownLatch threadStarted = new CountDownLatch(1);
753
754	<	new Thread(new CheckedRunnable() {
755	<	void realRun() throws InterruptedException {
756	<	q.transfer(SIZE);
757	<	threadAssertTrue(q.isEmpty());
758	<	}}).start();
754	>	Thread t = newStartedThread(new CheckedRunnable() {
755	>	public void realRun() throws InterruptedException {
756	>	threadStarted.countDown();
757	>	q.transfer(five);
758	>	checkEmpty(q);
759	>	}});
760
761	<	Thread.sleep(SHORT_DELAY_MS);
761	>	threadStarted.await();
762	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
763		assertEquals(1, q.size());
764	<	assertEquals(SIZE, (int) q.poll());
765	<	assertTrue(q.isEmpty());
764	>	assertSame(five, q.poll());
765	>	checkEmpty(q);
766	>	awaitTermination(t, MEDIUM_DELAY_MS);
767		}
768
769		/**
#	Line 865 | Line 773 | public class LinkedTransferQueueTest ext
773		final LinkedTransferQueue<Integer> q
774		= new LinkedTransferQueue<Integer>();
775
776	<	Thread first = new Thread(new CheckedRunnable() {
777	<	void realRun() throws InterruptedException {
778	<	Integer i = SIZE + 1;
779	<	q.transfer(i);
780	<	threadAssertTrue(!q.contains(i));
873	<	threadAssertEquals(1, q.size());
776	>	Thread first = newStartedThread(new CheckedRunnable() {
777	>	public void realRun() throws InterruptedException {
778	>	q.transfer(four);
779	>	assertTrue(!q.contains(four));
780	>	assertEquals(1, q.size());
781		}});
875	–	first.start();
782
783	<	Thread interruptedThread = new Thread(new CheckedInterruptedRunnable() {
784	<	void realRun() throws InterruptedException {
785	<	while (q.size() == 0)
786	<	Thread.yield();
787	<	q.transfer(SIZE);
788	<	}});
789	<	interruptedThread.start();
783	>	Thread interruptedThread = newStartedThread(
784	>	new CheckedInterruptedRunnable() {
785	>	public void realRun() throws InterruptedException {
786	>	while (q.isEmpty())
787	>	Thread.yield();
788	>	q.transfer(five);
789	>	}});
790
791		while (q.size() < 2)
792		Thread.yield();
793		assertEquals(2, q.size());
794	<	assertEquals(SIZE + 1, (int) q.poll());
794	>	assertSame(four, q.poll());
795		first.join();
796		assertEquals(1, q.size());
797		interruptedThread.interrupt();
798		interruptedThread.join();
799	<	assertEquals(0, q.size());
894	<	assertTrue(q.isEmpty());
799	>	checkEmpty(q);
800		}
801
802		/**
#	Line 900 | Line 805 | public class LinkedTransferQueueTest ext
805		*/
806		public void testTransfer4() throws InterruptedException {
807		final LinkedTransferQueue q = new LinkedTransferQueue();
808	<	new Thread(new CheckedRunnable() {
809	<	void realRun() throws InterruptedException {
808	>
809	>	Thread t = newStartedThread(new CheckedRunnable() {
810	>	public void realRun() throws InterruptedException {
811		q.transfer(four);
812	<	threadAssertFalse(q.contains(four));
813	<	threadAssertEquals(three, q.poll());
814	<	}}).start();
815	<	Thread.sleep(MEDIUM_DELAY_MS);
812	>	assertFalse(q.contains(four));
813	>	assertSame(three, q.poll());
814	>	}});
815	>
816	>	while (q.isEmpty())
817	>	Thread.yield();
818	>	assertFalse(q.isEmpty());
819	>	assertEquals(1, q.size());
820		assertTrue(q.offer(three));
821	<	assertEquals(four, q.poll());
821	>	assertSame(four, q.poll());
822	>	awaitTermination(t, MEDIUM_DELAY_MS);
823		}
824
825		/**
#	Line 919 | Line 830 | public class LinkedTransferQueueTest ext
830		final LinkedTransferQueue<Integer> q
831		= new LinkedTransferQueue<Integer>();
832
833	<	new Thread(new CheckedRunnable() {
834	<	void realRun() throws InterruptedException {
835	<	q.transfer(SIZE);
836	<	threadAssertTrue(q.isEmpty());
837	<	}}).start();
833	>	Thread t = newStartedThread(new CheckedRunnable() {
834	>	public void realRun() throws InterruptedException {
835	>	q.transfer(four);
836	>	checkEmpty(q);
837	>	}});
838
839	<	Thread.sleep(SHORT_DELAY_MS);
840	<	assertEquals(SIZE, (int) q.take());
841	<	assertTrue(q.isEmpty());
839	>	while (q.isEmpty())
840	>	Thread.yield();
841	>	assertFalse(q.isEmpty());
842	>	assertEquals(1, q.size());
843	>	assertSame(four, q.take());
844	>	checkEmpty(q);
845	>	awaitTermination(t, MEDIUM_DELAY_MS);
846		}
847
848		/**
#	Line 937 | Line 852 | public class LinkedTransferQueueTest ext
852		try {
853		final LinkedTransferQueue q = new LinkedTransferQueue();
854		q.tryTransfer(null);
855	<	this.shouldThrow();
856	<	} catch (NullPointerException ex) {
942	<	}
855	>	shouldThrow();
856	>	} catch (NullPointerException success) {}
857		}
858
859		/**
860		* tryTransfer returns false and does not enqueue if there are no
861		* consumers waiting to poll or take.
862		*/
863	<	public void testTryTransfer2() {
863	>	public void testTryTransfer2() throws InterruptedException {
864		final LinkedTransferQueue q = new LinkedTransferQueue();
865		assertFalse(q.tryTransfer(new Object()));
866		assertFalse(q.hasWaitingConsumer());
867	<	assertTrue(q.isEmpty());
954	<	assertEquals(0, q.size());
867	>	checkEmpty(q);
868		}
869
870		/**
#	Line 961 | Line 874 | public class LinkedTransferQueueTest ext
874		public void testTryTransfer3() throws InterruptedException {
875		final Object hotPotato = new Object();
876		final LinkedTransferQueue q = new LinkedTransferQueue();
877	<	new Thread(new CheckedRunnable() {
878	<	void realRun() {
877	>
878	>	Thread t = newStartedThread(new CheckedRunnable() {
879	>	public void realRun() {
880		while (! q.hasWaitingConsumer())
881		Thread.yield();
882	<	threadAssertTrue(q.hasWaitingConsumer());
883	<	threadAssertTrue(q.isEmpty());
884	<	threadAssertTrue(q.size() == 0);
885	<	threadAssertTrue(q.tryTransfer(hotPotato));
886	<	}}).start();
887	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) == hotPotato);
888	<	assertTrue(q.isEmpty());
882	>	assertTrue(q.hasWaitingConsumer());
883	>	checkEmpty(q);
884	>	assertTrue(q.tryTransfer(hotPotato));
885	>	}});
886	>
887	>	assertSame(hotPotato, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
888	>	checkEmpty(q);
889	>	awaitTermination(t, MEDIUM_DELAY_MS);
890		}
891
892		/**
#	Line 981 | Line 896 | public class LinkedTransferQueueTest ext
896		public void testTryTransfer4() throws InterruptedException {
897		final Object hotPotato = new Object();
898		final LinkedTransferQueue q = new LinkedTransferQueue();
899	<	new Thread(new CheckedRunnable() {
900	<	void realRun() {
899	>
900	>	Thread t = newStartedThread(new CheckedRunnable() {
901	>	public void realRun() {
902		while (! q.hasWaitingConsumer())
903		Thread.yield();
904	<	threadAssertTrue(q.hasWaitingConsumer());
905	<	threadAssertTrue(q.isEmpty());
906	<	threadAssertTrue(q.size() == 0);
907	<	threadAssertTrue(q.tryTransfer(hotPotato));
908	<	}}).start();
909	<	assertTrue(q.take() == hotPotato);
910	<	assertTrue(q.isEmpty());
904	>	assertTrue(q.hasWaitingConsumer());
905	>	checkEmpty(q);
906	>	assertTrue(q.tryTransfer(hotPotato));
907	>	}});
908	>
909	>	assertSame(q.take(), hotPotato);
910	>	checkEmpty(q);
911	>	awaitTermination(t, MEDIUM_DELAY_MS);
912		}
913
914		/**
915	<	* tryTransfer waits the amount given if interrupted, and
999	<	* throws interrupted exception
915	>	* tryTransfer blocks interruptibly if no takers
916		*/
917		public void testTryTransfer5() throws InterruptedException {
918		final LinkedTransferQueue q = new LinkedTransferQueue();
919	<	Thread toInterrupt = new Thread(new CheckedInterruptedRunnable() {
920	<	void realRun() throws InterruptedException {
921	<	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
919	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
920	>	assertTrue(q.isEmpty());
921	>
922	>	Thread t = newStartedThread(new CheckedRunnable() {
923	>	public void realRun() throws InterruptedException {
924	>	Thread.currentThread().interrupt();
925	>	try {
926	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
927	>	shouldThrow();
928	>	} catch (InterruptedException success) {}
929	>	assertFalse(Thread.interrupted());
930	>
931	>	pleaseInterrupt.countDown();
932	>	try {
933	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
934	>	shouldThrow();
935	>	} catch (InterruptedException success) {}
936	>	assertFalse(Thread.interrupted());
937		}});
938	<	toInterrupt.start();
939	<	Thread.sleep(SMALL_DELAY_MS);
940	<	toInterrupt.interrupt();
938	>
939	>	await(pleaseInterrupt);
940	>	assertThreadStaysAlive(t);
941	>	t.interrupt();
942	>	awaitTermination(t);
943	>	checkEmpty(q);
944		}
945
946		/**
947	<	* tryTransfer gives up after the timeout and return false
947	>	* tryTransfer gives up after the timeout and returns false
948		*/
949		public void testTryTransfer6() throws InterruptedException {
950		final LinkedTransferQueue q = new LinkedTransferQueue();
951	<	new Thread(new CheckedRunnable() {
952	<	void realRun() throws InterruptedException {
953	<	threadAssertFalse
954	<	(q.tryTransfer(new Object(),
955	<	SHORT_DELAY_MS, MILLISECONDS));
956	<	}}).start();
957	<	Thread.sleep(LONG_DELAY_MS);
958	<	assertTrue(q.isEmpty());
951	>
952	>	Thread t = newStartedThread(new CheckedRunnable() {
953	>	public void realRun() throws InterruptedException {
954	>	long t0 = System.nanoTime();
955	>	assertFalse(q.tryTransfer(new Object(),
956	>	timeoutMillis(), MILLISECONDS));
957	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
958	>	checkEmpty(q);
959	>	}});
960	>
961	>	awaitTermination(t);
962	>	checkEmpty(q);
963		}
964
965		/**
#	Line 1031 | Line 969 | public class LinkedTransferQueueTest ext
969		public void testTryTransfer7() throws InterruptedException {
970		final LinkedTransferQueue q = new LinkedTransferQueue();
971		assertTrue(q.offer(four));
972	<	new Thread(new CheckedRunnable() {
973	<	void realRun() throws InterruptedException {
974	<	threadAssertTrue(q.tryTransfer(five,
975	<	LONG_DELAY_MS, MILLISECONDS));
976	<	threadAssertTrue(q.isEmpty());
977	<	}}).start();
978	<	Thread.sleep(SHORT_DELAY_MS);
972	>
973	>	Thread t = newStartedThread(new CheckedRunnable() {
974	>	public void realRun() throws InterruptedException {
975	>	assertTrue(q.tryTransfer(five, MEDIUM_DELAY_MS, MILLISECONDS));
976	>	checkEmpty(q);
977	>	}});
978	>
979	>	while (q.size() != 2)
980	>	Thread.yield();
981		assertEquals(2, q.size());
982	<	assertEquals(four, q.poll());
983	<	assertEquals(five, q.poll());
984	<	assertTrue(q.isEmpty());
982	>	assertSame(four, q.poll());
983	>	assertSame(five, q.poll());
984	>	checkEmpty(q);
985	>	awaitTermination(t, MEDIUM_DELAY_MS);
986		}
987
988		/**
989	<	* tryTransfer attempts to enqueue into the q and fails returning
990	<	* false not enqueueing and the successive poll is null
989	>	* tryTransfer attempts to enqueue into the queue and fails
990	>	* returning false not enqueueing and the successive poll is null
991		*/
992		public void testTryTransfer8() throws InterruptedException {
993		final LinkedTransferQueue q = new LinkedTransferQueue();
994		assertTrue(q.offer(four));
995		assertEquals(1, q.size());
996	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
996	>	long t0 = System.nanoTime();
997	>	assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
998	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
999		assertEquals(1, q.size());
1000	<	assertEquals(four, q.poll());
1058	<	threadAssertTrue(q.isEmpty());
1000	>	assertSame(four, q.poll());
1001		assertNull(q.poll());
1002	+	checkEmpty(q);
1003		}
1004
1005		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1006		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1007	<	assertTrue(q.isEmpty());
1007	>	checkEmpty(q);
1008		for (int i = 0; i < n; i++) {
1009		assertEquals(i, q.size());
1010		assertTrue(q.offer(i));
#	Line 1071 | Line 1014 | public class LinkedTransferQueueTest ext
1014		return q;
1015		}
1016
1017	<	private static class ConsumerObserver {
1018	<
1019	<	private int waitingConsumers;
1020	<
1021	<	private ConsumerObserver() {
1022	<	}
1023	<
1024	<	private void setWaitingConsumer(int i) {
1025	<	this.waitingConsumers = i;
1026	<	}
1027	<
1028	<	private int getWaitingConsumers() {
1086	<	return waitingConsumers;
1017	>	/**
1018	>	* remove(null), contains(null) always return false
1019	>	*/
1020	>	public void testNeverContainsNull() {
1021	>	Collection<?>[] qs = {
1022	>	new LinkedTransferQueue<Object>(),
1023	>	populatedQueue(2),
1024	>	};
1025	>
1026	>	for (Collection<?> q : qs) {
1027	>	assertFalse(q.contains(null));
1028	>	assertFalse(q.remove(null));
1029		}
1030		}
1031		}

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