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

Comparing jsr166/src/test/tck/LinkedTransferQueueTest.java (file contents):
Revision 1.10 by jsr166, Thu Aug 6 03:55:39 2009 UTC vs.
Revision 1.61 by jsr166, Sat May 23 00:53:08 2015 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());
35	>	main(suite(), args);
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 49 | Line 57 | public class LinkedTransferQueueTest ext
57		try {
58		new LinkedTransferQueue(null);
59		shouldThrow();
60	<	} catch (NullPointerException success) {
53	<	}
60	>	} catch (NullPointerException success) {}
61		}
62
63		/**
#	Line 58 | 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];
63	<	new LinkedTransferQueue(Arrays.asList(ints));
70	>	new LinkedTransferQueue(elements);
71		shouldThrow();
72	<	} catch (NullPointerException success) {
66	<	}
72	>	} catch (NullPointerException success) {}
73		}
74
75		/**
#	Line 71 | 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];
76	<	for (int i = 0; i < SIZE - 1; ++i) {
77	<	ints[i] = i;
78	<	}
79	<	new LinkedTransferQueue(Arrays.asList(ints));
85	>	new LinkedTransferQueue(elements);
86		shouldThrow();
87	<	} catch (NullPointerException success) {
82	<	}
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);
118	>	BlockingQueue q = populatedQueue(SIZE);
119		for (int i = 0; i < SIZE; ++i) {
120		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
121		assertEquals(SIZE - i, q.size());
122	<	q.remove();
122	>	assertEquals(i, q.remove());
123		}
124		for (int i = 0; i < SIZE; ++i) {
125		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
126		assertEquals(i, q.size());
127	<	q.add(i);
117	<	}
118	<	}
119	<
120	<	/**
121	<	* offer(null) throws NullPointerException
122	<	*/
123	<	public void testOfferNull() {
124	<	try {
125	<	LinkedTransferQueue q = new LinkedTransferQueue();
126	<	q.offer(null);
127	<	shouldThrow();
128	<	} catch (NullPointerException success) {
129	<	}
130	<	}
131	<
132	<	/**
133	<	* add(null) throws NullPointerException
134	<	*/
135	<	public void testAddNull() {
136	<	try {
137	<	LinkedTransferQueue q = new LinkedTransferQueue();
138	<	q.add(null);
139	<	shouldThrow();
140	<	} catch (NullPointerException success) {
141	<	}
142	<	}
143	<
144	<	/**
145	<	* addAll(null) throws NullPointerException
146	<	*/
147	<	public void testAddAll1() {
148	<	try {
149	<	LinkedTransferQueue q = new LinkedTransferQueue();
150	<	q.addAll(null);
151	<	shouldThrow();
152	<	} catch (NullPointerException success) {
127	>	assertTrue(q.add(i));
128		}
129		}
130
#	Line 157 | Line 132 | public class LinkedTransferQueueTest ext
132		* addAll(this) throws IllegalArgumentException
133		*/
134		public void testAddAllSelf() {
135	+	LinkedTransferQueue q = populatedQueue(SIZE);
136		try {
161	–	LinkedTransferQueue q = populatedQueue(SIZE);
137		q.addAll(q);
138		shouldThrow();
139	<	} catch (IllegalArgumentException success) {
165	<	}
166	<	}
167	<
168	<	/**
169	<	* addAll of a collection with null elements throws NullPointerException
170	<	*/
171	<	public void testAddAll2() {
172	<	try {
173	<	LinkedTransferQueue q = new LinkedTransferQueue();
174	<	Integer[] ints = new Integer[SIZE];
175	<	q.addAll(Arrays.asList(ints));
176	<	shouldThrow();
177	<	} catch (NullPointerException success) {
178	<	}
139	>	} catch (IllegalArgumentException success) {}
140		}
141
142		/**
#	Line 183 | Line 144 | public class LinkedTransferQueueTest ext
144		* NullPointerException after possibly adding some elements
145		*/
146		public void testAddAll3() {
147	+	LinkedTransferQueue q = new LinkedTransferQueue();
148	+	Integer[] ints = new Integer[SIZE];
149	+	for (int i = 0; i < SIZE - 1; ++i)
150	+	ints[i] = i;
151		try {
187	–	LinkedTransferQueue q = new LinkedTransferQueue();
188	–	Integer[] ints = new Integer[SIZE];
189	–	for (int i = 0; i < SIZE - 1; ++i) {
190	–	ints[i] = i;
191	–	}
152		q.addAll(Arrays.asList(ints));
153		shouldThrow();
154	<	} catch (NullPointerException success) {
195	<	}
154	>	} catch (NullPointerException success) {}
155		}
156
157		/**
#	Line 213 | Line 172 | public class LinkedTransferQueueTest ext
172		}
173
174		/**
216	–	* put(null) throws NullPointerException
217	–	*/
218	–	public void testPutNull() throws InterruptedException {
219	–	try {
220	–	LinkedTransferQueue q = new LinkedTransferQueue();
221	–	q.put(null);
222	–	shouldThrow();
223	–	} catch (NullPointerException success) {}
224	–	}
225	–
226	–	/**
175		* all elements successfully put are contained
176		*/
177		public void testPut() {
178		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
179		for (int i = 0; i < SIZE; ++i) {
180	+	assertEquals(i, q.size());
181		q.put(i);
182		assertTrue(q.contains(i));
183		}
235	–	assertEquals(q.size(), SIZE);
184		}
185
186		/**
#	Line 246 | Line 194 | public class LinkedTransferQueueTest ext
194		}
195
196		/**
197	<	* take blocks interruptibly when empty
250	<	*/
251	<	public void testTakeFromEmpty() throws InterruptedException {
252	<	final LinkedTransferQueue q = new LinkedTransferQueue();
253	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
254	<	void realRun() throws InterruptedException {
255	<	q.take();
256	<	}});
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
197	>	* take removes existing elements until empty, then blocks interruptibly
198		*/
199		public void testBlockingTake() throws InterruptedException {
200	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
201	<	void realRun() throws InterruptedException {
202	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
200	>	final BlockingQueue q = populatedQueue(SIZE);
201	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
202	>	Thread t = newStartedThread(new CheckedRunnable() {
203	>	public void realRun() throws InterruptedException {
204		for (int i = 0; i < SIZE; ++i) {
205	<	threadAssertEquals(i, (int) q.take());
205	>	assertEquals(i, q.take());
206		}
207	<	q.take();
207	>
208	>	Thread.currentThread().interrupt();
209	>	try {
210	>	q.take();
211	>	shouldThrow();
212	>	} catch (InterruptedException success) {}
213	>	assertFalse(Thread.interrupted());
214	>
215	>	pleaseInterrupt.countDown();
216	>	try {
217	>	q.take();
218	>	shouldThrow();
219	>	} catch (InterruptedException success) {}
220	>	assertFalse(Thread.interrupted());
221		}});
222	<	Thread.sleep(SHORT_DELAY_MS);
222	>
223	>	await(pleaseInterrupt);
224	>	assertThreadStaysAlive(t);
225		t.interrupt();
226	<	t.join();
226	>	awaitTermination(t);
227		}
228
229		/**
230		* poll succeeds unless empty
231		*/
232	<	public void testPoll() {
232	>	public void testPoll() throws InterruptedException {
233		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
234		for (int i = 0; i < SIZE; ++i) {
235		assertEquals(i, (int) q.poll());
236		}
237		assertNull(q.poll());
238	+	checkEmpty(q);
239		}
240
241		/**
242	<	* timed pool with zero timeout succeeds when non-empty, else times out
242	>	* timed poll with zero timeout succeeds when non-empty, else times out
243		*/
244		public void testTimedPoll0() throws InterruptedException {
245		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
#	Line 296 | Line 247 | public class LinkedTransferQueueTest ext
247		assertEquals(i, (int) q.poll(0, MILLISECONDS));
248		}
249		assertNull(q.poll(0, MILLISECONDS));
250	+	checkEmpty(q);
251		}
252
253		/**
254	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
254	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
255		*/
256		public void testTimedPoll() throws InterruptedException {
257		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
258		for (int i = 0; i < SIZE; ++i) {
259	<	assertEquals(i, (int) q.poll(SHORT_DELAY_MS, MILLISECONDS));
260	<	}
261	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
259	>	long startTime = System.nanoTime();
260	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
261	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
262	>	}
263	>	long startTime = System.nanoTime();
264	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
265	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
266	>	checkEmpty(q);
267		}
268
269		/**
#	Line 314 | Line 271 | public class LinkedTransferQueueTest ext
271		* returning timeout status
272		*/
273		public void testInterruptedTimedPoll() throws InterruptedException {
274	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
275	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
276	<	void realRun() throws InterruptedException {
274	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
275	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
276	>	Thread t = newStartedThread(new CheckedRunnable() {
277	>	public void realRun() throws InterruptedException {
278		for (int i = 0; i < SIZE; ++i) {
279	<	threadAssertEquals(i, (int) q.poll(LONG_DELAY_MS,
280	<	MILLISECONDS));
279	>	long t0 = System.nanoTime();
280	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
281	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
282	>	}
283	>	long t0 = System.nanoTime();
284	>	aboutToWait.countDown();
285	>	try {
286	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
287	>	shouldThrow();
288	>	} catch (InterruptedException success) {
289	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
290		}
324	–	q.poll(LONG_DELAY_MS, MILLISECONDS);
291		}});
292	<	Thread.sleep(SMALL_DELAY_MS);
292	>
293	>	aboutToWait.await();
294	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
295		t.interrupt();
296	<	t.join();
297	<	assertEquals(q.size(), 0);
330	<	assertNull(q.poll());
296	>	awaitTermination(t, MEDIUM_DELAY_MS);
297	>	checkEmpty(q);
298		}
299
300		/**
301	<	* timed poll before a delayed offer fails; after offer succeeds;
302	<	* on interruption throws
301	>	* timed poll after thread interrupted throws InterruptedException
302	>	* instead of returning timeout status
303		*/
304	<	public void testTimedPollWithOffer() throws InterruptedException {
305	<	final LinkedTransferQueue q = new LinkedTransferQueue();
306	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
307	<	void realRun() throws InterruptedException {
308	<	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
309	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
310	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
304	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
305	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
306	>	Thread t = newStartedThread(new CheckedRunnable() {
307	>	public void realRun() throws InterruptedException {
308	>	Thread.currentThread().interrupt();
309	>	for (int i = 0; i < SIZE; ++i) {
310	>	long t0 = System.nanoTime();
311	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
312	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
313	>	}
314	>	try {
315	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
316	>	shouldThrow();
317	>	} catch (InterruptedException success) {}
318		}});
319	<	Thread.sleep(SMALL_DELAY_MS);
320	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
321	<	t.interrupt();
348	<	t.join();
319	>
320	>	awaitTermination(t, MEDIUM_DELAY_MS);
321	>	checkEmpty(q);
322		}
323
324		/**
325		* peek returns next element, or null if empty
326		*/
327	<	public void testPeek() {
327	>	public void testPeek() throws InterruptedException {
328		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
329		for (int i = 0; i < SIZE; ++i) {
330		assertEquals(i, (int) q.peek());
#	Line 360 | Line 333 | public class LinkedTransferQueueTest ext
333		i != (int) q.peek());
334		}
335		assertNull(q.peek());
336	+	checkEmpty(q);
337		}
338
339		/**
340		* element returns next element, or throws NoSuchElementException if empty
341		*/
342	<	public void testElement() {
342	>	public void testElement() throws InterruptedException {
343		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
344		for (int i = 0; i < SIZE; ++i) {
345		assertEquals(i, (int) q.element());
#	Line 374 | Line 348 | public class LinkedTransferQueueTest ext
348		try {
349		q.element();
350		shouldThrow();
351	<	} catch (NoSuchElementException success) {
352	<	}
351	>	} catch (NoSuchElementException success) {}
352	>	checkEmpty(q);
353		}
354
355		/**
356		* remove removes next element, or throws NoSuchElementException if empty
357		*/
358	<	public void testRemove() {
358	>	public void testRemove() throws InterruptedException {
359		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
360		for (int i = 0; i < SIZE; ++i) {
361		assertEquals(i, (int) q.remove());
#	Line 389 | Line 363 | public class LinkedTransferQueueTest ext
363		try {
364		q.remove();
365		shouldThrow();
366	<	} catch (NoSuchElementException success) {
367	<	}
394	<	}
395	<
396	<	/**
397	<	* remove(x) removes x and returns true if present
398	<	*/
399	<	public void testRemoveElement() {
400	<	LinkedTransferQueue q = populatedQueue(SIZE);
401	<	for (int i = 1; i < SIZE; i += 2) {
402	<	assertTrue(q.remove(i));
403	<	}
404	<	for (int i = 0; i < SIZE; i += 2) {
405	<	assertTrue(q.remove(i));
406	<	assertFalse(q.remove(i + 1));
407	<	}
408	<	assertTrue(q.isEmpty());
366	>	} catch (NoSuchElementException success) {}
367	>	checkEmpty(q);
368		}
369
370		/**
#	Line 418 | Line 377 | public class LinkedTransferQueueTest ext
377		assertTrue(q.remove(one));
378		assertTrue(q.remove(two));
379		assertTrue(q.add(three));
380	<	assertTrue(q.take() != null);
380	>	assertSame(q.take(), three);
381		}
382
383		/**
#	Line 436 | Line 395 | public class LinkedTransferQueueTest ext
395		/**
396		* clear removes all elements
397		*/
398	<	public void testClear() {
398	>	public void testClear() throws InterruptedException {
399		LinkedTransferQueue q = populatedQueue(SIZE);
400		q.clear();
401	<	assertTrue(q.isEmpty());
443	<	assertEquals(0, q.size());
401	>	checkEmpty(q);
402		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
403		q.add(one);
404		assertFalse(q.isEmpty());
405	+	assertEquals(1, q.size());
406		assertTrue(q.contains(one));
407		q.clear();
408	<	assertTrue(q.isEmpty());
408	>	checkEmpty(q);
409		}
410
411		/**
#	Line 500 | Line 459 | public class LinkedTransferQueueTest ext
459		}
460
461		/**
462	<	* toArray contains all elements
462	>	* toArray() contains all elements in FIFO order
463		*/
464	<	public void testToArray() throws InterruptedException {
464	>	public void testToArray() {
465		LinkedTransferQueue q = populatedQueue(SIZE);
466		Object[] o = q.toArray();
467		for (int i = 0; i < o.length; i++) {
468	<	assertEquals(o[i], q.take());
468	>	assertSame(o[i], q.poll());
469		}
470		}
471
472		/**
473	<	* toArray(a) contains all elements
473	>	* toArray(a) contains all elements in FIFO order
474		*/
475	<	public void testToArray2() throws InterruptedException {
475	>	public void testToArray2() {
476		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
477		Integer[] ints = new Integer[SIZE];
478	<	ints = q.toArray(ints);
478	>	Integer[] array = q.toArray(ints);
479	>	assertSame(ints, array);
480		for (int i = 0; i < ints.length; i++) {
481	<	assertEquals(ints[i], q.take());
522	<	}
523	<	}
524	<
525	<	/**
526	<	* toArray(null) throws NullPointerException
527	<	*/
528	<	public void testToArray_BadArg() {
529	<	try {
530	<	LinkedTransferQueue q = populatedQueue(SIZE);
531	<	Object o[] = q.toArray(null);
532	<	shouldThrow();
533	<	} catch (NullPointerException success) {
481	>	assertSame(ints[i], q.poll());
482		}
483		}
484
485		/**
486	<	* toArray with incompatible array type throws CCE
486	>	* toArray(incompatible array type) throws ArrayStoreException
487		*/
488		public void testToArray1_BadArg() {
489	+	LinkedTransferQueue q = populatedQueue(SIZE);
490		try {
491	<	LinkedTransferQueue q = populatedQueue(SIZE);
543	<	Object o[] = q.toArray(new String[10]);
491	>	q.toArray(new String[10]);
492		shouldThrow();
493	<	} catch (ArrayStoreException success) {
546	<	}
493	>	} catch (ArrayStoreException success) {}
494		}
495
496		/**
#	Line 552 | Line 499 | public class LinkedTransferQueueTest ext
499		public void testIterator() throws InterruptedException {
500		LinkedTransferQueue q = populatedQueue(SIZE);
501		Iterator it = q.iterator();
502	<	int i = 0;
503	<	while (it.hasNext()) {
504	<	assertEquals(it.next(), i++);
505	<	}
502	>	int i;
503	>	for (i = 0; it.hasNext(); i++)
504	>	assertTrue(q.contains(it.next()));
505	>	assertEquals(i, SIZE);
506	>	assertIteratorExhausted(it);
507	>
508	>	it = q.iterator();
509	>	for (i = 0; it.hasNext(); i++)
510	>	assertEquals(it.next(), q.take());
511		assertEquals(i, SIZE);
512	+	assertIteratorExhausted(it);
513		}
514
515		/**
516	<	* iterator.remove removes current element
516	>	* iterator of empty collection has no elements
517	>	*/
518	>	public void testEmptyIterator() {
519	>	assertIteratorExhausted(new LinkedTransferQueue().iterator());
520	>	}
521	>
522	>	/**
523	>	* iterator.remove() removes current element
524		*/
525		public void testIteratorRemove() {
526		final LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 573 | Line 533 | public class LinkedTransferQueueTest ext
533		it.remove();
534
535		it = q.iterator();
536	<	assertEquals(it.next(), one);
537	<	assertEquals(it.next(), three);
536	>	assertSame(it.next(), one);
537	>	assertSame(it.next(), three);
538		assertFalse(it.hasNext());
539		}
540
#	Line 618 | Line 578 | public class LinkedTransferQueueTest ext
578		LinkedTransferQueue q = populatedQueue(SIZE);
579		String s = q.toString();
580		for (int i = 0; i < SIZE; ++i) {
581	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
581	>	assertTrue(s.contains(String.valueOf(i)));
582		}
583		}
584
#	Line 627 | Line 587 | public class LinkedTransferQueueTest ext
587		*/
588		public void testOfferInExecutor() {
589		final LinkedTransferQueue q = new LinkedTransferQueue();
590	<	q.add(one);
631	<	q.add(two);
590	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
591		ExecutorService executor = Executors.newFixedThreadPool(2);
592
593		executor.execute(new CheckedRunnable() {
594	<	void realRun() {
595	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS,
596	<	MILLISECONDS));
594	>	public void realRun() throws InterruptedException {
595	>	threadsStarted.await();
596	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
597		}});
598
599		executor.execute(new CheckedRunnable() {
600	<	void realRun() throws InterruptedException {
601	<	Thread.sleep(SMALL_DELAY_MS);
602	<	threadAssertEquals(one, q.take());
600	>	public void realRun() throws InterruptedException {
601	>	threadsStarted.await();
602	>	assertSame(one, q.take());
603	>	checkEmpty(q);
604		}});
605
606		joinPool(executor);
607		}
608
609		/**
610	<	* poll retrieves elements across Executor threads
610	>	* timed poll retrieves elements across Executor threads
611		*/
612		public void testPollInExecutor() {
613		final LinkedTransferQueue q = new LinkedTransferQueue();
614	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
615		ExecutorService executor = Executors.newFixedThreadPool(2);
616
617		executor.execute(new CheckedRunnable() {
618	<	void realRun() throws InterruptedException {
619	<	threadAssertNull(q.poll());
620	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS,
621	<	MILLISECONDS));
622	<	threadAssertTrue(q.isEmpty());
618	>	public void realRun() throws InterruptedException {
619	>	assertNull(q.poll());
620	>	threadsStarted.await();
621	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
622	>	checkEmpty(q);
623		}});
624
625		executor.execute(new CheckedRunnable() {
626	<	void realRun() throws InterruptedException {
627	<	Thread.sleep(SMALL_DELAY_MS);
626	>	public void realRun() throws InterruptedException {
627	>	threadsStarted.await();
628		q.put(one);
629		}});
630
#	Line 674 | Line 635 | public class LinkedTransferQueueTest ext
635		* A deserialized serialized queue has same elements in same order
636		*/
637		public void testSerialization() throws Exception {
638	<	LinkedTransferQueue q = populatedQueue(SIZE);
639	<
679	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
680	<	ObjectOutputStream out
681	<	= new ObjectOutputStream(new BufferedOutputStream(bout));
682	<	out.writeObject(q);
683	<	out.close();
638	>	Queue x = populatedQueue(SIZE);
639	>	Queue y = serialClone(x);
640
641	<	ByteArrayInputStream bin
642	<	= new ByteArrayInputStream(bout.toByteArray());
643	<	ObjectInputStream in
644	<	= new ObjectInputStream(new BufferedInputStream(bin));
645	<	LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
646	<
647	<	assertEquals(q.size(), r.size());
692	<	while (!q.isEmpty()) {
693	<	assertEquals(q.remove(), r.remove());
694	<	}
695	<	}
696	<
697	<	/**
698	<	* drainTo(null) throws NullPointerException
699	<	*/
700	<	public void testDrainToNull() {
701	<	LinkedTransferQueue q = populatedQueue(SIZE);
702	<	try {
703	<	q.drainTo(null);
704	<	shouldThrow();
705	<	} catch (NullPointerException success) {
706	<	}
707	<	}
708	<
709	<	/**
710	<	* drainTo(this) throws IllegalArgumentException
711	<	*/
712	<	public void testDrainToSelf() {
713	<	LinkedTransferQueue q = populatedQueue(SIZE);
714	<	try {
715	<	q.drainTo(q);
716	<	shouldThrow();
717	<	} catch (IllegalArgumentException success) {
641	>	assertNotSame(y, x);
642	>	assertEquals(x.size(), y.size());
643	>	assertEquals(x.toString(), y.toString());
644	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
645	>	while (!x.isEmpty()) {
646	>	assertFalse(y.isEmpty());
647	>	assertEquals(x.remove(), y.remove());
648		}
649	+	assertTrue(y.isEmpty());
650		}
651
652		/**
#	Line 725 | Line 656 | public class LinkedTransferQueueTest ext
656		LinkedTransferQueue q = populatedQueue(SIZE);
657		ArrayList l = new ArrayList();
658		q.drainTo(l);
659	<	assertEquals(q.size(), 0);
660	<	assertEquals(l.size(), SIZE);
659	>	assertEquals(0, q.size());
660	>	assertEquals(SIZE, l.size());
661		for (int i = 0; i < SIZE; ++i) {
662	<	assertEquals(l.get(i), i);
662	>	assertEquals(i, l.get(i));
663		}
664		q.add(zero);
665		q.add(one);
#	Line 737 | Line 668 | public class LinkedTransferQueueTest ext
668		assertTrue(q.contains(one));
669		l.clear();
670		q.drainTo(l);
671	<	assertEquals(q.size(), 0);
672	<	assertEquals(l.size(), 2);
671	>	assertEquals(0, q.size());
672	>	assertEquals(2, l.size());
673		for (int i = 0; i < 2; ++i) {
674	<	assertEquals(l.get(i), i);
674	>	assertEquals(i, l.get(i));
675		}
676		}
677
678		/**
679	<	* drainTo empties full queue, unblocking a waiting put.
679	>	* drainTo(c) empties full queue, unblocking a waiting put.
680		*/
681		public void testDrainToWithActivePut() throws InterruptedException {
682		final LinkedTransferQueue q = populatedQueue(SIZE);
683		Thread t = newStartedThread(new CheckedRunnable() {
684	<	void realRun() {
684	>	public void realRun() {
685		q.put(SIZE + 1);
686		}});
687		ArrayList l = new ArrayList();
688		q.drainTo(l);
689		assertTrue(l.size() >= SIZE);
690	<	for (int i = 0; i < SIZE; ++i) {
691	<	assertEquals(l.get(i), i);
692	<	}
762	<	t.join();
690	>	for (int i = 0; i < SIZE; ++i)
691	>	assertEquals(i, l.get(i));
692	>	awaitTermination(t, MEDIUM_DELAY_MS);
693		assertTrue(q.size() + l.size() >= SIZE);
694		}
695
696		/**
697	<	* 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
697	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
698		*/
699		public void testDrainToN() {
700		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 799 | Line 705 | public class LinkedTransferQueueTest ext
705		ArrayList l = new ArrayList();
706		q.drainTo(l, i);
707		int k = (i < SIZE) ? i : SIZE;
708	<	assertEquals(l.size(), k);
709	<	assertEquals(q.size(), SIZE - k);
710	<	for (int j = 0; j < k; ++j) {
711	<	assertEquals(l.get(j), j);
712	<	}
807	<	while (q.poll() != null)
808	<	;
708	>	assertEquals(k, l.size());
709	>	assertEquals(SIZE - k, q.size());
710	>	for (int j = 0; j < k; ++j)
711	>	assertEquals(j, l.get(j));
712	>	do {} while (q.poll() != null);
713		}
714		}
715
716		/**
717	<	* poll and take decrement the waiting consumer count
717	>	* timed poll() or take() increments the waiting consumer count;
718	>	* offer(e) decrements the waiting consumer count
719		*/
720		public void testWaitingConsumer() throws InterruptedException {
721		final LinkedTransferQueue q = new LinkedTransferQueue();
722	<	final ConsumerObserver waiting = new ConsumerObserver();
722	>	assertEquals(0, q.getWaitingConsumerCount());
723	>	assertFalse(q.hasWaitingConsumer());
724	>	final CountDownLatch threadStarted = new CountDownLatch(1);
725
726		Thread t = newStartedThread(new CheckedRunnable() {
727	<	void realRun() throws InterruptedException {
728	<	Thread.sleep(SMALL_DELAY_MS);
729	<	threadAssertTrue(q.hasWaitingConsumer());
730	<	waiting.setWaitingConsumer(q.getWaitingConsumerCount());
731	<	threadAssertTrue(q.offer(new Object()));
727	>	public void realRun() throws InterruptedException {
728	>	threadStarted.countDown();
729	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
730	>	assertEquals(0, q.getWaitingConsumerCount());
731	>	assertFalse(q.hasWaitingConsumer());
732		}});
733
734	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) != null);
735	<	assertTrue(q.getWaitingConsumerCount()
736	<	< waiting.getWaitingConsumers());
737	<	t.join();
734	>	threadStarted.await();
735	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
736	>	assertEquals(1, q.getWaitingConsumerCount());
737	>	assertTrue(q.hasWaitingConsumer());
738	>
739	>	assertTrue(q.offer(one));
740	>	assertEquals(0, q.getWaitingConsumerCount());
741	>	assertFalse(q.hasWaitingConsumer());
742	>
743	>	awaitTermination(t, MEDIUM_DELAY_MS);
744		}
745
746		/**
#	Line 838 | Line 751 | public class LinkedTransferQueueTest ext
751		LinkedTransferQueue q = new LinkedTransferQueue();
752		q.transfer(null);
753		shouldThrow();
754	<	} catch (NullPointerException ex) {
842	<	}
754	>	} catch (NullPointerException success) {}
755		}
756
757		/**
#	Line 849 | Line 761 | public class LinkedTransferQueueTest ext
761		public void testTransfer2() throws InterruptedException {
762		final LinkedTransferQueue<Integer> q
763		= new LinkedTransferQueue<Integer>();
764	+	final CountDownLatch threadStarted = new CountDownLatch(1);
765
766		Thread t = newStartedThread(new CheckedRunnable() {
767	<	void realRun() throws InterruptedException {
768	<	q.transfer(SIZE);
769	<	threadAssertTrue(q.isEmpty());
767	>	public void realRun() throws InterruptedException {
768	>	threadStarted.countDown();
769	>	q.transfer(five);
770	>	checkEmpty(q);
771		}});
772
773	<	Thread.sleep(SHORT_DELAY_MS);
773	>	threadStarted.await();
774	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
775		assertEquals(1, q.size());
776	<	assertEquals(SIZE, (int) q.poll());
777	<	assertTrue(q.isEmpty());
778	<	t.join();
776	>	assertSame(five, q.poll());
777	>	checkEmpty(q);
778	>	awaitTermination(t, MEDIUM_DELAY_MS);
779		}
780
781		/**
#	Line 871 | Line 786 | public class LinkedTransferQueueTest ext
786		= new LinkedTransferQueue<Integer>();
787
788		Thread first = newStartedThread(new CheckedRunnable() {
789	<	void realRun() throws InterruptedException {
790	<	Integer i = SIZE + 1;
791	<	q.transfer(i);
792	<	threadAssertTrue(!q.contains(i));
878	<	threadAssertEquals(1, q.size());
789	>	public void realRun() throws InterruptedException {
790	>	q.transfer(four);
791	>	assertTrue(!q.contains(four));
792	>	assertEquals(1, q.size());
793		}});
794
795		Thread interruptedThread = newStartedThread(
796		new CheckedInterruptedRunnable() {
797	<	void realRun() throws InterruptedException {
798	<	while (q.size() == 0)
797	>	public void realRun() throws InterruptedException {
798	>	while (q.isEmpty())
799		Thread.yield();
800	<	q.transfer(SIZE);
800	>	q.transfer(five);
801		}});
802
803		while (q.size() < 2)
804		Thread.yield();
805		assertEquals(2, q.size());
806	<	assertEquals(SIZE + 1, (int) q.poll());
806	>	assertSame(four, q.poll());
807		first.join();
808		assertEquals(1, q.size());
809		interruptedThread.interrupt();
810		interruptedThread.join();
811	<	assertEquals(0, q.size());
898	<	assertTrue(q.isEmpty());
811	>	checkEmpty(q);
812		}
813
814		/**
#	Line 906 | Line 819 | public class LinkedTransferQueueTest ext
819		final LinkedTransferQueue q = new LinkedTransferQueue();
820
821		Thread t = newStartedThread(new CheckedRunnable() {
822	<	void realRun() throws InterruptedException {
822	>	public void realRun() throws InterruptedException {
823		q.transfer(four);
824	<	threadAssertFalse(q.contains(four));
825	<	threadAssertEquals(three, q.poll());
824	>	assertFalse(q.contains(four));
825	>	assertSame(three, q.poll());
826		}});
827
828	<	Thread.sleep(SHORT_DELAY_MS);
828	>	while (q.isEmpty())
829	>	Thread.yield();
830	>	assertFalse(q.isEmpty());
831	>	assertEquals(1, q.size());
832		assertTrue(q.offer(three));
833	<	assertEquals(four, q.poll());
834	<	t.join();
833	>	assertSame(four, q.poll());
834	>	awaitTermination(t, MEDIUM_DELAY_MS);
835		}
836
837		/**
#	Line 927 | Line 843 | public class LinkedTransferQueueTest ext
843		= new LinkedTransferQueue<Integer>();
844
845		Thread t = newStartedThread(new CheckedRunnable() {
846	<	void realRun() throws InterruptedException {
847	<	q.transfer(SIZE);
848	<	threadAssertTrue(q.isEmpty());
846	>	public void realRun() throws InterruptedException {
847	>	q.transfer(four);
848	>	checkEmpty(q);
849		}});
850
851	<	Thread.sleep(SHORT_DELAY_MS);
852	<	assertEquals(SIZE, (int) q.take());
853	<	assertTrue(q.isEmpty());
854	<	t.join();
851	>	while (q.isEmpty())
852	>	Thread.yield();
853	>	assertFalse(q.isEmpty());
854	>	assertEquals(1, q.size());
855	>	assertSame(four, q.take());
856	>	checkEmpty(q);
857	>	awaitTermination(t, MEDIUM_DELAY_MS);
858		}
859
860		/**
861		* tryTransfer(null) throws NullPointerException
862		*/
863		public void testTryTransfer1() {
864	+	final LinkedTransferQueue q = new LinkedTransferQueue();
865		try {
946	–	final LinkedTransferQueue q = new LinkedTransferQueue();
866		q.tryTransfer(null);
867		shouldThrow();
868	<	} catch (NullPointerException ex) {
950	<	}
868	>	} catch (NullPointerException success) {}
869		}
870
871		/**
872		* tryTransfer returns false and does not enqueue if there are no
873		* consumers waiting to poll or take.
874		*/
875	<	public void testTryTransfer2() {
875	>	public void testTryTransfer2() throws InterruptedException {
876		final LinkedTransferQueue q = new LinkedTransferQueue();
877		assertFalse(q.tryTransfer(new Object()));
878		assertFalse(q.hasWaitingConsumer());
879	<	assertTrue(q.isEmpty());
962	<	assertEquals(0, q.size());
879	>	checkEmpty(q);
880		}
881
882		/**
#	Line 971 | Line 888 | public class LinkedTransferQueueTest ext
888		final LinkedTransferQueue q = new LinkedTransferQueue();
889
890		Thread t = newStartedThread(new CheckedRunnable() {
891	<	void realRun() {
891	>	public void realRun() {
892		while (! q.hasWaitingConsumer())
893		Thread.yield();
894	<	threadAssertTrue(q.hasWaitingConsumer());
895	<	threadAssertTrue(q.isEmpty());
896	<	threadAssertTrue(q.size() == 0);
980	<	threadAssertTrue(q.tryTransfer(hotPotato));
894	>	assertTrue(q.hasWaitingConsumer());
895	>	checkEmpty(q);
896	>	assertTrue(q.tryTransfer(hotPotato));
897		}});
898
899	<	assertTrue(q.poll(MEDIUM_DELAY_MS, MILLISECONDS) == hotPotato);
900	<	assertTrue(q.isEmpty());
901	<	t.join();
899	>	assertSame(hotPotato, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
900	>	checkEmpty(q);
901	>	awaitTermination(t, MEDIUM_DELAY_MS);
902		}
903
904		/**
#	Line 994 | Line 910 | public class LinkedTransferQueueTest ext
910		final LinkedTransferQueue q = new LinkedTransferQueue();
911
912		Thread t = newStartedThread(new CheckedRunnable() {
913	<	void realRun() {
913	>	public void realRun() {
914		while (! q.hasWaitingConsumer())
915		Thread.yield();
916	<	threadAssertTrue(q.hasWaitingConsumer());
917	<	threadAssertTrue(q.isEmpty());
918	<	threadAssertTrue(q.size() == 0);
1003	<	threadAssertTrue(q.tryTransfer(hotPotato));
916	>	assertTrue(q.hasWaitingConsumer());
917	>	checkEmpty(q);
918	>	assertTrue(q.tryTransfer(hotPotato));
919		}});
920
921	<	assertTrue(q.take() == hotPotato);
922	<	assertTrue(q.isEmpty());
923	<	t.join();
921	>	assertSame(q.take(), hotPotato);
922	>	checkEmpty(q);
923	>	awaitTermination(t, MEDIUM_DELAY_MS);
924		}
925
926		/**
927	<	* tryTransfer waits the amount given if interrupted, and
1013	<	* throws interrupted exception
927	>	* tryTransfer blocks interruptibly if no takers
928		*/
929		public void testTryTransfer5() throws InterruptedException {
930		final LinkedTransferQueue q = new LinkedTransferQueue();
931	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
932	+	assertTrue(q.isEmpty());
933
934	<	Thread toInterrupt = newStartedThread(new CheckedInterruptedRunnable() {
935	<	void realRun() throws InterruptedException {
936	<	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
934	>	Thread t = newStartedThread(new CheckedRunnable() {
935	>	public void realRun() throws InterruptedException {
936	>	Thread.currentThread().interrupt();
937	>	try {
938	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
939	>	shouldThrow();
940	>	} catch (InterruptedException success) {}
941	>	assertFalse(Thread.interrupted());
942	>
943	>	pleaseInterrupt.countDown();
944	>	try {
945	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
946	>	shouldThrow();
947	>	} catch (InterruptedException success) {}
948	>	assertFalse(Thread.interrupted());
949		}});
950
951	<	Thread.sleep(SMALL_DELAY_MS);
952	<	toInterrupt.interrupt();
953	<	toInterrupt.join();
951	>	await(pleaseInterrupt);
952	>	assertThreadStaysAlive(t);
953	>	t.interrupt();
954	>	awaitTermination(t);
955	>	checkEmpty(q);
956		}
957
958		/**
959	<	* tryTransfer gives up after the timeout and return false
959	>	* tryTransfer gives up after the timeout and returns false
960		*/
961		public void testTryTransfer6() throws InterruptedException {
962		final LinkedTransferQueue q = new LinkedTransferQueue();
963
964		Thread t = newStartedThread(new CheckedRunnable() {
965	<	void realRun() throws InterruptedException {
966	<	threadAssertFalse
967	<	(q.tryTransfer(new Object(),
968	<	SHORT_DELAY_MS, MILLISECONDS));
965	>	public void realRun() throws InterruptedException {
966	>	long t0 = System.nanoTime();
967	>	assertFalse(q.tryTransfer(new Object(),
968	>	timeoutMillis(), MILLISECONDS));
969	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
970	>	checkEmpty(q);
971		}});
972
973	<	Thread.sleep(SMALL_DELAY_MS);
974	<	assertTrue(q.isEmpty());
1043	<	t.join();
973	>	awaitTermination(t);
974	>	checkEmpty(q);
975		}
976
977		/**
#	Line 1052 | Line 983 | public class LinkedTransferQueueTest ext
983		assertTrue(q.offer(four));
984
985		Thread t = newStartedThread(new CheckedRunnable() {
986	<	void realRun() throws InterruptedException {
987	<	threadAssertTrue(q.tryTransfer(five,
988	<	MEDIUM_DELAY_MS, MILLISECONDS));
1058	<	threadAssertTrue(q.isEmpty());
986	>	public void realRun() throws InterruptedException {
987	>	assertTrue(q.tryTransfer(five, MEDIUM_DELAY_MS, MILLISECONDS));
988	>	checkEmpty(q);
989		}});
990
991	<	Thread.sleep(SHORT_DELAY_MS);
991	>	while (q.size() != 2)
992	>	Thread.yield();
993		assertEquals(2, q.size());
994	<	assertEquals(four, q.poll());
995	<	assertEquals(five, q.poll());
996	<	assertTrue(q.isEmpty());
997	<	t.join();
994	>	assertSame(four, q.poll());
995	>	assertSame(five, q.poll());
996	>	checkEmpty(q);
997	>	awaitTermination(t, MEDIUM_DELAY_MS);
998		}
999
1000		/**
1001	<	* tryTransfer attempts to enqueue into the q and fails returning
1002	<	* false not enqueueing and the successive poll is null
1001	>	* tryTransfer attempts to enqueue into the queue and fails
1002	>	* returning false not enqueueing and the successive poll is null
1003		*/
1004		public void testTryTransfer8() throws InterruptedException {
1005		final LinkedTransferQueue q = new LinkedTransferQueue();
1006		assertTrue(q.offer(four));
1007		assertEquals(1, q.size());
1008	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
1008	>	long t0 = System.nanoTime();
1009	>	assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
1010	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
1011		assertEquals(1, q.size());
1012	<	assertEquals(four, q.poll());
1080	<	threadAssertTrue(q.isEmpty());
1012	>	assertSame(four, q.poll());
1013		assertNull(q.poll());
1014	+	checkEmpty(q);
1015		}
1016
1017		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1018		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1019	<	assertTrue(q.isEmpty());
1019	>	checkEmpty(q);
1020		for (int i = 0; i < n; i++) {
1021		assertEquals(i, q.size());
1022		assertTrue(q.offer(i));
#	Line 1093 | Line 1026 | public class LinkedTransferQueueTest ext
1026		return q;
1027		}
1028
1029	<	private static class ConsumerObserver {
1030	<
1031	<	private int waitingConsumers;
1032	<
1033	<	private ConsumerObserver() {
1034	<	}
1035	<
1036	<	private void setWaitingConsumer(int i) {
1037	<	this.waitingConsumers = i;
1038	<	}
1039	<
1040	<	private int getWaitingConsumers() {
1108	<	return waitingConsumers;
1029	>	/**
1030	>	* remove(null), contains(null) always return false
1031	>	*/
1032	>	public void testNeverContainsNull() {
1033	>	Collection<?>[] qs = {
1034	>	new LinkedTransferQueue<Object>(),
1035	>	populatedQueue(2),
1036	>	};
1037	>
1038	>	for (Collection<?> q : qs) {
1039	>	assertFalse(q.contains(null));
1040	>	assertFalse(q.remove(null));
1041		}
1042		}
1043		}

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