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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 1.66 by jsr166, Sun Oct 18 04:48:32 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	+	static class Implementation implements CollectionImplementation {
28	+	public Class<?> klazz() { return LinkedTransferQueue.class; }
29	+	public Collection emptyCollection() { return new LinkedTransferQueue(); }
30	+	public Object makeElement(int i) { return i; }
31	+	public boolean isConcurrent() { return true; }
32	+	public boolean permitsNulls() { return false; }
33	+	}
34	+
35	+	public static class Generic extends BlockingQueueTest {
36	+	protected BlockingQueue emptyCollection() {
37	+	return new LinkedTransferQueue();
38	+	}
39	+	}
40
41		public static void main(String[] args) {
42	<	junit.textui.TestRunner.run(suite());
42	>	main(suite(), args);
43		}
44
45		public static Test suite() {
46	<	return new TestSuite(LinkedTransferQueueTest.class);
46	>	return newTestSuite(LinkedTransferQueueTest.class,
47	>	new Generic().testSuite(),
48	>	CollectionTest.testSuite(new Implementation()));
49		}
50
51		/**
#	Line 49 | Line 65 | public class LinkedTransferQueueTest ext
65		try {
66		new LinkedTransferQueue(null);
67		shouldThrow();
68	<	} catch (NullPointerException success) {
53	<	}
68	>	} catch (NullPointerException success) {}
69		}
70
71		/**
#	Line 58 | Line 73 | public class LinkedTransferQueueTest ext
73		* NullPointerException
74		*/
75		public void testConstructor3() {
76	+	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
77		try {
78	<	Integer[] ints = new Integer[SIZE];
63	<	new LinkedTransferQueue(Arrays.asList(ints));
78	>	new LinkedTransferQueue(elements);
79		shouldThrow();
80	<	} catch (NullPointerException success) {
66	<	}
80	>	} catch (NullPointerException success) {}
81		}
82
83		/**
#	Line 71 | Line 85 | public class LinkedTransferQueueTest ext
85		* throws NullPointerException
86		*/
87		public void testConstructor4() {
88	+	Integer[] ints = new Integer[SIZE];
89	+	for (int i = 0; i < SIZE - 1; ++i)
90	+	ints[i] = i;
91	+	Collection<Integer> elements = Arrays.asList(ints);
92		try {
93	<	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));
93	>	new LinkedTransferQueue(elements);
94		shouldThrow();
95	<	} catch (NullPointerException success) {
82	<	}
95	>	} catch (NullPointerException success) {}
96		}
97
98		/**
99		* Queue contains all elements of the collection it is initialized by
100		*/
101		public void testConstructor5() {
102	<	try {
103	<	Integer[] ints = new Integer[SIZE];
104	<	for (int i = 0; i < SIZE; ++i) {
105	<	ints[i] = i;
106	<	}
107	<	LinkedTransferQueue q
108	<	= new LinkedTransferQueue(Arrays.asList(ints));
109	<	for (int i = 0; i < SIZE; ++i) {
110	<	assertEquals(ints[i], q.poll());
111	<	}
112	<	} finally {
102	>	Integer[] ints = new Integer[SIZE];
103	>	for (int i = 0; i < SIZE; ++i) {
104	>	ints[i] = i;
105	>	}
106	>	List intList = Arrays.asList(ints);
107	>	LinkedTransferQueue q
108	>	= new LinkedTransferQueue(intList);
109	>	assertEquals(q.size(), intList.size());
110	>	assertEquals(q.toString(), intList.toString());
111	>	assertTrue(Arrays.equals(q.toArray(),
112	>	intList.toArray()));
113	>	assertTrue(Arrays.equals(q.toArray(new Object[0]),
114	>	intList.toArray(new Object[0])));
115	>	assertTrue(Arrays.equals(q.toArray(new Object[SIZE]),
116	>	intList.toArray(new Object[SIZE])));
117	>	for (int i = 0; i < SIZE; ++i) {
118	>	assertEquals(ints[i], q.poll());
119		}
120		}
121
122		/**
123	<	* Remaining capacity never decrease nor increase on add or remove
123	>	* remainingCapacity() always returns Integer.MAX_VALUE
124		*/
125		public void testRemainingCapacity() {
126	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
126	>	BlockingQueue q = populatedQueue(SIZE);
127		for (int i = 0; i < SIZE; ++i) {
128		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
129		assertEquals(SIZE - i, q.size());
130	<	q.remove();
130	>	assertEquals(i, q.remove());
131		}
132		for (int i = 0; i < SIZE; ++i) {
133		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
134		assertEquals(i, q.size());
135	<	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) {
135	>	assertTrue(q.add(i));
136		}
137		}
138
#	Line 157 | Line 140 | public class LinkedTransferQueueTest ext
140		* addAll(this) throws IllegalArgumentException
141		*/
142		public void testAddAllSelf() {
143	+	LinkedTransferQueue q = populatedQueue(SIZE);
144		try {
161	–	LinkedTransferQueue q = populatedQueue(SIZE);
145		q.addAll(q);
146		shouldThrow();
147	<	} 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	<	}
147	>	} catch (IllegalArgumentException success) {}
148		}
149
150		/**
#	Line 183 | Line 152 | public class LinkedTransferQueueTest ext
152		* NullPointerException after possibly adding some elements
153		*/
154		public void testAddAll3() {
155	+	LinkedTransferQueue q = new LinkedTransferQueue();
156	+	Integer[] ints = new Integer[SIZE];
157	+	for (int i = 0; i < SIZE - 1; ++i)
158	+	ints[i] = i;
159		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	–	}
160		q.addAll(Arrays.asList(ints));
161		shouldThrow();
162	<	} catch (NullPointerException success) {
195	<	}
162	>	} catch (NullPointerException success) {}
163		}
164
165		/**
#	Line 213 | Line 180 | public class LinkedTransferQueueTest ext
180		}
181
182		/**
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	–	/**
183		* all elements successfully put are contained
184		*/
185		public void testPut() {
186		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
187		for (int i = 0; i < SIZE; ++i) {
188	+	assertEquals(i, q.size());
189		q.put(i);
190		assertTrue(q.contains(i));
191		}
235	–	assertEquals(q.size(), SIZE);
192		}
193
194		/**
#	Line 246 | Line 202 | public class LinkedTransferQueueTest ext
202		}
203
204		/**
205	<	* 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
205	>	* take removes existing elements until empty, then blocks interruptibly
206		*/
207		public void testBlockingTake() throws InterruptedException {
208	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
209	<	void realRun() throws InterruptedException {
210	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
208	>	final BlockingQueue q = populatedQueue(SIZE);
209	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
210	>	Thread t = newStartedThread(new CheckedRunnable() {
211	>	public void realRun() throws InterruptedException {
212		for (int i = 0; i < SIZE; ++i) {
213	<	threadAssertEquals(i, (int) q.take());
213	>	assertEquals(i, q.take());
214		}
215	<	q.take();
215	>
216	>	Thread.currentThread().interrupt();
217	>	try {
218	>	q.take();
219	>	shouldThrow();
220	>	} catch (InterruptedException success) {}
221	>	assertFalse(Thread.interrupted());
222	>
223	>	pleaseInterrupt.countDown();
224	>	try {
225	>	q.take();
226	>	shouldThrow();
227	>	} catch (InterruptedException success) {}
228	>	assertFalse(Thread.interrupted());
229		}});
230	<	Thread.sleep(SHORT_DELAY_MS);
230	>
231	>	await(pleaseInterrupt);
232	>	assertThreadStaysAlive(t);
233		t.interrupt();
234	<	t.join();
234	>	awaitTermination(t);
235		}
236
237		/**
238		* poll succeeds unless empty
239		*/
240	<	public void testPoll() {
240	>	public void testPoll() throws InterruptedException {
241		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
242		for (int i = 0; i < SIZE; ++i) {
243		assertEquals(i, (int) q.poll());
244		}
245		assertNull(q.poll());
246	+	checkEmpty(q);
247		}
248
249		/**
250	<	* timed pool with zero timeout succeeds when non-empty, else times out
250	>	* timed poll with zero timeout succeeds when non-empty, else times out
251		*/
252		public void testTimedPoll0() throws InterruptedException {
253		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
#	Line 296 | Line 255 | public class LinkedTransferQueueTest ext
255		assertEquals(i, (int) q.poll(0, MILLISECONDS));
256		}
257		assertNull(q.poll(0, MILLISECONDS));
258	+	checkEmpty(q);
259		}
260
261		/**
262	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
262	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
263		*/
264		public void testTimedPoll() throws InterruptedException {
265		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
266	<	for (int i = 0; i < SIZE; ++i) {
267	<	assertEquals(i, (int) q.poll(SHORT_DELAY_MS, MILLISECONDS));
268	<	}
269	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
266	>	long startTime = System.nanoTime();
267	>	for (int i = 0; i < SIZE; ++i)
268	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
269	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
270	>
271	>	startTime = System.nanoTime();
272	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
273	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
274	>	checkEmpty(q);
275		}
276
277		/**
#	Line 314 | Line 279 | public class LinkedTransferQueueTest ext
279		* returning timeout status
280		*/
281		public void testInterruptedTimedPoll() throws InterruptedException {
282	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
283	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
284	<	void realRun() throws InterruptedException {
285	<	for (int i = 0; i < SIZE; ++i) {
286	<	threadAssertEquals(i, (int) q.poll(LONG_DELAY_MS,
287	<	MILLISECONDS));
288	<	}
289	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
282	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
283	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
284	>	Thread t = newStartedThread(new CheckedRunnable() {
285	>	public void realRun() throws InterruptedException {
286	>	long startTime = System.nanoTime();
287	>	for (int i = 0; i < SIZE; ++i)
288	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
289	>	aboutToWait.countDown();
290	>	try {
291	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
292	>	shouldThrow();
293	>	} catch (InterruptedException success) {}
294	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
295		}});
296	<	Thread.sleep(SMALL_DELAY_MS);
296	>
297	>	aboutToWait.await();
298	>	waitForThreadToEnterWaitState(t);
299		t.interrupt();
300	<	t.join();
301	<	assertEquals(q.size(), 0);
330	<	assertNull(q.poll());
300	>	awaitTermination(t);
301	>	checkEmpty(q);
302		}
303
304		/**
305	<	* timed poll before a delayed offer fails; after offer succeeds;
306	<	* on interruption throws
305	>	* timed poll after thread interrupted throws InterruptedException
306	>	* instead of returning timeout status
307		*/
308	<	public void testTimedPollWithOffer() throws InterruptedException {
309	<	final LinkedTransferQueue q = new LinkedTransferQueue();
310	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
311	<	void realRun() throws InterruptedException {
312	<	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
313	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
314	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
308	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
309	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
310	>	Thread t = newStartedThread(new CheckedRunnable() {
311	>	public void realRun() throws InterruptedException {
312	>	long startTime = System.nanoTime();
313	>	Thread.currentThread().interrupt();
314	>	for (int i = 0; i < SIZE; ++i)
315	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
316	>	try {
317	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
318	>	shouldThrow();
319	>	} catch (InterruptedException success) {}
320	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
321		}});
322	<	Thread.sleep(SMALL_DELAY_MS);
323	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
324	<	t.interrupt();
348	<	t.join();
322	>
323	>	awaitTermination(t);
324	>	checkEmpty(q);
325		}
326
327		/**
328		* peek returns next element, or null if empty
329		*/
330	<	public void testPeek() {
330	>	public void testPeek() throws InterruptedException {
331		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
332		for (int i = 0; i < SIZE; ++i) {
333		assertEquals(i, (int) q.peek());
#	Line 360 | Line 336 | public class LinkedTransferQueueTest ext
336		i != (int) q.peek());
337		}
338		assertNull(q.peek());
339	+	checkEmpty(q);
340		}
341
342		/**
343		* element returns next element, or throws NoSuchElementException if empty
344		*/
345	<	public void testElement() {
345	>	public void testElement() throws InterruptedException {
346		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
347		for (int i = 0; i < SIZE; ++i) {
348		assertEquals(i, (int) q.element());
#	Line 374 | Line 351 | public class LinkedTransferQueueTest ext
351		try {
352		q.element();
353		shouldThrow();
354	<	} catch (NoSuchElementException success) {
355	<	}
354	>	} catch (NoSuchElementException success) {}
355	>	checkEmpty(q);
356		}
357
358		/**
359		* remove removes next element, or throws NoSuchElementException if empty
360		*/
361	<	public void testRemove() {
361	>	public void testRemove() throws InterruptedException {
362		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
363		for (int i = 0; i < SIZE; ++i) {
364		assertEquals(i, (int) q.remove());
#	Line 389 | Line 366 | public class LinkedTransferQueueTest ext
366		try {
367		q.remove();
368		shouldThrow();
369	<	} catch (NoSuchElementException success) {
370	<	}
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());
369	>	} catch (NoSuchElementException success) {}
370	>	checkEmpty(q);
371		}
372
373		/**
#	Line 418 | Line 380 | public class LinkedTransferQueueTest ext
380		assertTrue(q.remove(one));
381		assertTrue(q.remove(two));
382		assertTrue(q.add(three));
383	<	assertTrue(q.take() != null);
383	>	assertSame(q.take(), three);
384		}
385
386		/**
#	Line 436 | Line 398 | public class LinkedTransferQueueTest ext
398		/**
399		* clear removes all elements
400		*/
401	<	public void testClear() {
401	>	public void testClear() throws InterruptedException {
402		LinkedTransferQueue q = populatedQueue(SIZE);
403		q.clear();
404	<	assertTrue(q.isEmpty());
443	<	assertEquals(0, q.size());
404	>	checkEmpty(q);
405		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
406		q.add(one);
407		assertFalse(q.isEmpty());
408	+	assertEquals(1, q.size());
409		assertTrue(q.contains(one));
410		q.clear();
411	<	assertTrue(q.isEmpty());
411	>	checkEmpty(q);
412		}
413
414		/**
#	Line 500 | Line 462 | public class LinkedTransferQueueTest ext
462		}
463
464		/**
465	<	* toArray contains all elements
465	>	* toArray() contains all elements in FIFO order
466		*/
467	<	public void testToArray() throws InterruptedException {
467	>	public void testToArray() {
468		LinkedTransferQueue q = populatedQueue(SIZE);
469		Object[] o = q.toArray();
470		for (int i = 0; i < o.length; i++) {
471	<	assertEquals(o[i], q.take());
471	>	assertSame(o[i], q.poll());
472		}
473		}
474
475		/**
476	<	* toArray(a) contains all elements
476	>	* toArray(a) contains all elements in FIFO order
477		*/
478	<	public void testToArray2() throws InterruptedException {
478	>	public void testToArray2() {
479		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
480		Integer[] ints = new Integer[SIZE];
481	<	ints = q.toArray(ints);
481	>	Integer[] array = q.toArray(ints);
482	>	assertSame(ints, array);
483		for (int i = 0; i < ints.length; i++) {
484	<	assertEquals(ints[i], q.take());
484	>	assertSame(ints[i], q.poll());
485		}
486		}
487
488		/**
489	<	* 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) {
534	<	}
535	<	}
536	<
537	<	/**
538	<	* toArray with incompatible array type throws CCE
489	>	* toArray(incompatible array type) throws ArrayStoreException
490		*/
491		public void testToArray1_BadArg() {
492	+	LinkedTransferQueue q = populatedQueue(SIZE);
493		try {
494	<	LinkedTransferQueue q = populatedQueue(SIZE);
543	<	Object o[] = q.toArray(new String[10]);
494	>	q.toArray(new String[10]);
495		shouldThrow();
496	<	} catch (ArrayStoreException success) {
546	<	}
496	>	} catch (ArrayStoreException success) {}
497		}
498
499		/**
#	Line 552 | Line 502 | public class LinkedTransferQueueTest ext
502		public void testIterator() throws InterruptedException {
503		LinkedTransferQueue q = populatedQueue(SIZE);
504		Iterator it = q.iterator();
505	<	int i = 0;
506	<	while (it.hasNext()) {
507	<	assertEquals(it.next(), i++);
508	<	}
505	>	int i;
506	>	for (i = 0; it.hasNext(); i++)
507	>	assertTrue(q.contains(it.next()));
508	>	assertEquals(i, SIZE);
509	>	assertIteratorExhausted(it);
510	>
511	>	it = q.iterator();
512	>	for (i = 0; it.hasNext(); i++)
513	>	assertEquals(it.next(), q.take());
514		assertEquals(i, SIZE);
515	+	assertIteratorExhausted(it);
516		}
517
518		/**
519	<	* iterator.remove removes current element
519	>	* iterator of empty collection has no elements
520	>	*/
521	>	public void testEmptyIterator() {
522	>	assertIteratorExhausted(new LinkedTransferQueue().iterator());
523	>	}
524	>
525	>	/**
526	>	* iterator.remove() removes current element
527		*/
528		public void testIteratorRemove() {
529		final LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 573 | Line 536 | public class LinkedTransferQueueTest ext
536		it.remove();
537
538		it = q.iterator();
539	<	assertEquals(it.next(), one);
540	<	assertEquals(it.next(), three);
539	>	assertSame(it.next(), one);
540	>	assertSame(it.next(), three);
541		assertFalse(it.hasNext());
542		}
543
#	Line 618 | Line 581 | public class LinkedTransferQueueTest ext
581		LinkedTransferQueue q = populatedQueue(SIZE);
582		String s = q.toString();
583		for (int i = 0; i < SIZE; ++i) {
584	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
584	>	assertTrue(s.contains(String.valueOf(i)));
585		}
586		}
587
#	Line 627 | Line 590 | public class LinkedTransferQueueTest ext
590		*/
591		public void testOfferInExecutor() {
592		final LinkedTransferQueue q = new LinkedTransferQueue();
593	<	q.add(one);
594	<	q.add(two);
595	<	ExecutorService executor = Executors.newFixedThreadPool(2);
596	<
597	<	executor.execute(new CheckedRunnable() {
598	<	void realRun() {
599	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS,
600	<	MILLISECONDS));
601	<	}});
602	<
603	<	executor.execute(new CheckedRunnable() {
641	<	void realRun() throws InterruptedException {
642	<	Thread.sleep(SMALL_DELAY_MS);
643	<	threadAssertEquals(one, q.take());
644	<	}});
593	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
594	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
595	>	try (PoolCleaner cleaner = cleaner(executor)) {
596	>
597	>	executor.execute(new CheckedRunnable() {
598	>	public void realRun() throws InterruptedException {
599	>	threadsStarted.await();
600	>	long startTime = System.nanoTime();
601	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
602	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
603	>	}});
604
605	<	joinPool(executor);
605	>	executor.execute(new CheckedRunnable() {
606	>	public void realRun() throws InterruptedException {
607	>	threadsStarted.await();
608	>	assertSame(one, q.take());
609	>	checkEmpty(q);
610	>	}});
611	>	}
612		}
613
614		/**
615	<	* poll retrieves elements across Executor threads
615	>	* timed poll retrieves elements across Executor threads
616		*/
617		public void testPollInExecutor() {
618		final LinkedTransferQueue q = new LinkedTransferQueue();
619	<	ExecutorService executor = Executors.newFixedThreadPool(2);
620	<
621	<	executor.execute(new CheckedRunnable() {
622	<	void realRun() throws InterruptedException {
623	<	threadAssertNull(q.poll());
624	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS,
625	<	MILLISECONDS));
626	<	threadAssertTrue(q.isEmpty());
627	<	}});
628	<
629	<	executor.execute(new CheckedRunnable() {
630	<	void realRun() throws InterruptedException {
631	<	Thread.sleep(SMALL_DELAY_MS);
667	<	q.put(one);
668	<	}});
619	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
620	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
621	>	try (PoolCleaner cleaner = cleaner(executor)) {
622	>
623	>	executor.execute(new CheckedRunnable() {
624	>	public void realRun() throws InterruptedException {
625	>	assertNull(q.poll());
626	>	threadsStarted.await();
627	>	long startTime = System.nanoTime();
628	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
629	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
630	>	checkEmpty(q);
631	>	}});
632
633	<	joinPool(executor);
633	>	executor.execute(new CheckedRunnable() {
634	>	public void realRun() throws InterruptedException {
635	>	threadsStarted.await();
636	>	q.put(one);
637	>	}});
638	>	}
639		}
640
641		/**
642		* A deserialized serialized queue has same elements in same order
643		*/
644		public void testSerialization() throws Exception {
645	<	LinkedTransferQueue q = populatedQueue(SIZE);
646	<
679	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
680	<	ObjectOutputStream out
681	<	= new ObjectOutputStream(new BufferedOutputStream(bout));
682	<	out.writeObject(q);
683	<	out.close();
645	>	Queue x = populatedQueue(SIZE);
646	>	Queue y = serialClone(x);
647
648	<	ByteArrayInputStream bin
649	<	= new ByteArrayInputStream(bout.toByteArray());
650	<	ObjectInputStream in
651	<	= new ObjectInputStream(new BufferedInputStream(bin));
652	<	LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
653	<
654	<	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) {
648	>	assertNotSame(y, x);
649	>	assertEquals(x.size(), y.size());
650	>	assertEquals(x.toString(), y.toString());
651	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
652	>	while (!x.isEmpty()) {
653	>	assertFalse(y.isEmpty());
654	>	assertEquals(x.remove(), y.remove());
655		}
656	+	assertTrue(y.isEmpty());
657		}
658
659		/**
#	Line 725 | Line 663 | public class LinkedTransferQueueTest ext
663		LinkedTransferQueue q = populatedQueue(SIZE);
664		ArrayList l = new ArrayList();
665		q.drainTo(l);
666	<	assertEquals(q.size(), 0);
667	<	assertEquals(l.size(), SIZE);
666	>	assertEquals(0, q.size());
667	>	assertEquals(SIZE, l.size());
668		for (int i = 0; i < SIZE; ++i) {
669	<	assertEquals(l.get(i), i);
669	>	assertEquals(i, l.get(i));
670		}
671		q.add(zero);
672		q.add(one);
#	Line 737 | Line 675 | public class LinkedTransferQueueTest ext
675		assertTrue(q.contains(one));
676		l.clear();
677		q.drainTo(l);
678	<	assertEquals(q.size(), 0);
679	<	assertEquals(l.size(), 2);
678	>	assertEquals(0, q.size());
679	>	assertEquals(2, l.size());
680		for (int i = 0; i < 2; ++i) {
681	<	assertEquals(l.get(i), i);
681	>	assertEquals(i, l.get(i));
682		}
683		}
684
685		/**
686	<	* drainTo empties full queue, unblocking a waiting put.
686	>	* drainTo(c) empties full queue, unblocking a waiting put.
687		*/
688		public void testDrainToWithActivePut() throws InterruptedException {
689		final LinkedTransferQueue q = populatedQueue(SIZE);
690		Thread t = newStartedThread(new CheckedRunnable() {
691	<	void realRun() {
691	>	public void realRun() {
692		q.put(SIZE + 1);
693		}});
694		ArrayList l = new ArrayList();
695		q.drainTo(l);
696		assertTrue(l.size() >= SIZE);
697	<	for (int i = 0; i < SIZE; ++i) {
698	<	assertEquals(l.get(i), i);
699	<	}
762	<	t.join();
697	>	for (int i = 0; i < SIZE; ++i)
698	>	assertEquals(i, l.get(i));
699	>	awaitTermination(t);
700		assertTrue(q.size() + l.size() >= SIZE);
701		}
702
703		/**
704	<	* 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
704	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
705		*/
706		public void testDrainToN() {
707		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 799 | Line 712 | public class LinkedTransferQueueTest ext
712		ArrayList l = new ArrayList();
713		q.drainTo(l, i);
714		int k = (i < SIZE) ? i : SIZE;
715	<	assertEquals(l.size(), k);
716	<	assertEquals(q.size(), SIZE - k);
717	<	for (int j = 0; j < k; ++j) {
718	<	assertEquals(l.get(j), j);
719	<	}
807	<	while (q.poll() != null)
808	<	;
715	>	assertEquals(k, l.size());
716	>	assertEquals(SIZE - k, q.size());
717	>	for (int j = 0; j < k; ++j)
718	>	assertEquals(j, l.get(j));
719	>	do {} while (q.poll() != null);
720		}
721		}
722
723		/**
724	<	* poll and take decrement the waiting consumer count
724	>	* timed poll() or take() increments the waiting consumer count;
725	>	* offer(e) decrements the waiting consumer count
726		*/
727		public void testWaitingConsumer() throws InterruptedException {
728		final LinkedTransferQueue q = new LinkedTransferQueue();
729	<	final ConsumerObserver waiting = new ConsumerObserver();
729	>	assertEquals(0, q.getWaitingConsumerCount());
730	>	assertFalse(q.hasWaitingConsumer());
731	>	final CountDownLatch threadStarted = new CountDownLatch(1);
732
733		Thread t = newStartedThread(new CheckedRunnable() {
734	<	void realRun() throws InterruptedException {
735	<	Thread.sleep(SMALL_DELAY_MS);
736	<	threadAssertTrue(q.hasWaitingConsumer());
737	<	waiting.setWaitingConsumer(q.getWaitingConsumerCount());
738	<	threadAssertTrue(q.offer(new Object()));
734	>	public void realRun() throws InterruptedException {
735	>	threadStarted.countDown();
736	>	long startTime = System.nanoTime();
737	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
738	>	assertEquals(0, q.getWaitingConsumerCount());
739	>	assertFalse(q.hasWaitingConsumer());
740	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
741		}});
742
743	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) != null);
744	<	assertTrue(q.getWaitingConsumerCount()
745	<	< waiting.getWaitingConsumers());
746	<	t.join();
743	>	threadStarted.await();
744	>	waitForThreadToEnterWaitState(t);
745	>	assertEquals(1, q.getWaitingConsumerCount());
746	>	assertTrue(q.hasWaitingConsumer());
747	>
748	>	assertTrue(q.offer(one));
749	>	assertEquals(0, q.getWaitingConsumerCount());
750	>	assertFalse(q.hasWaitingConsumer());
751	>
752	>	awaitTermination(t);
753		}
754
755		/**
#	Line 838 | Line 760 | public class LinkedTransferQueueTest ext
760		LinkedTransferQueue q = new LinkedTransferQueue();
761		q.transfer(null);
762		shouldThrow();
763	<	} catch (NullPointerException ex) {
842	<	}
763	>	} catch (NullPointerException success) {}
764		}
765
766		/**
#	Line 849 | Line 770 | public class LinkedTransferQueueTest ext
770		public void testTransfer2() throws InterruptedException {
771		final LinkedTransferQueue<Integer> q
772		= new LinkedTransferQueue<Integer>();
773	+	final CountDownLatch threadStarted = new CountDownLatch(1);
774
775		Thread t = newStartedThread(new CheckedRunnable() {
776	<	void realRun() throws InterruptedException {
777	<	q.transfer(SIZE);
778	<	threadAssertTrue(q.isEmpty());
776	>	public void realRun() throws InterruptedException {
777	>	threadStarted.countDown();
778	>	q.transfer(five);
779	>	checkEmpty(q);
780		}});
781
782	<	Thread.sleep(SHORT_DELAY_MS);
782	>	threadStarted.await();
783	>	waitForThreadToEnterWaitState(t);
784		assertEquals(1, q.size());
785	<	assertEquals(SIZE, (int) q.poll());
786	<	assertTrue(q.isEmpty());
787	<	t.join();
785	>	assertSame(five, q.poll());
786	>	checkEmpty(q);
787	>	awaitTermination(t);
788		}
789
790		/**
#	Line 871 | Line 795 | public class LinkedTransferQueueTest ext
795		= new LinkedTransferQueue<Integer>();
796
797		Thread first = newStartedThread(new CheckedRunnable() {
798	<	void realRun() throws InterruptedException {
799	<	Integer i = SIZE + 1;
800	<	q.transfer(i);
801	<	threadAssertTrue(!q.contains(i));
878	<	threadAssertEquals(1, q.size());
798	>	public void realRun() throws InterruptedException {
799	>	q.transfer(four);
800	>	assertTrue(!q.contains(four));
801	>	assertEquals(1, q.size());
802		}});
803
804		Thread interruptedThread = newStartedThread(
805		new CheckedInterruptedRunnable() {
806	<	void realRun() throws InterruptedException {
807	<	while (q.size() == 0)
806	>	public void realRun() throws InterruptedException {
807	>	while (q.isEmpty())
808		Thread.yield();
809	<	q.transfer(SIZE);
809	>	q.transfer(five);
810		}});
811
812		while (q.size() < 2)
813		Thread.yield();
814		assertEquals(2, q.size());
815	<	assertEquals(SIZE + 1, (int) q.poll());
815	>	assertSame(four, q.poll());
816		first.join();
817		assertEquals(1, q.size());
818		interruptedThread.interrupt();
819		interruptedThread.join();
820	<	assertEquals(0, q.size());
898	<	assertTrue(q.isEmpty());
820	>	checkEmpty(q);
821		}
822
823		/**
#	Line 906 | Line 828 | public class LinkedTransferQueueTest ext
828		final LinkedTransferQueue q = new LinkedTransferQueue();
829
830		Thread t = newStartedThread(new CheckedRunnable() {
831	<	void realRun() throws InterruptedException {
831	>	public void realRun() throws InterruptedException {
832		q.transfer(four);
833	<	threadAssertFalse(q.contains(four));
834	<	threadAssertEquals(three, q.poll());
833	>	assertFalse(q.contains(four));
834	>	assertSame(three, q.poll());
835		}});
836
837	<	Thread.sleep(SHORT_DELAY_MS);
837	>	while (q.isEmpty())
838	>	Thread.yield();
839	>	assertFalse(q.isEmpty());
840	>	assertEquals(1, q.size());
841		assertTrue(q.offer(three));
842	<	assertEquals(four, q.poll());
843	<	t.join();
842	>	assertSame(four, q.poll());
843	>	awaitTermination(t);
844		}
845
846		/**
#	Line 927 | Line 852 | public class LinkedTransferQueueTest ext
852		= new LinkedTransferQueue<Integer>();
853
854		Thread t = newStartedThread(new CheckedRunnable() {
855	<	void realRun() throws InterruptedException {
856	<	q.transfer(SIZE);
857	<	threadAssertTrue(q.isEmpty());
855	>	public void realRun() throws InterruptedException {
856	>	q.transfer(four);
857	>	checkEmpty(q);
858		}});
859
860	<	Thread.sleep(SHORT_DELAY_MS);
861	<	assertEquals(SIZE, (int) q.take());
862	<	assertTrue(q.isEmpty());
863	<	t.join();
860	>	while (q.isEmpty())
861	>	Thread.yield();
862	>	assertFalse(q.isEmpty());
863	>	assertEquals(1, q.size());
864	>	assertSame(four, q.take());
865	>	checkEmpty(q);
866	>	awaitTermination(t);
867		}
868
869		/**
870		* tryTransfer(null) throws NullPointerException
871		*/
872		public void testTryTransfer1() {
873	+	final LinkedTransferQueue q = new LinkedTransferQueue();
874		try {
946	–	final LinkedTransferQueue q = new LinkedTransferQueue();
875		q.tryTransfer(null);
876		shouldThrow();
877	<	} catch (NullPointerException ex) {
950	<	}
877	>	} catch (NullPointerException success) {}
878		}
879
880		/**
881		* tryTransfer returns false and does not enqueue if there are no
882		* consumers waiting to poll or take.
883		*/
884	<	public void testTryTransfer2() {
884	>	public void testTryTransfer2() throws InterruptedException {
885		final LinkedTransferQueue q = new LinkedTransferQueue();
886		assertFalse(q.tryTransfer(new Object()));
887		assertFalse(q.hasWaitingConsumer());
888	<	assertTrue(q.isEmpty());
962	<	assertEquals(0, q.size());
888	>	checkEmpty(q);
889		}
890
891		/**
#	Line 971 | Line 897 | public class LinkedTransferQueueTest ext
897		final LinkedTransferQueue q = new LinkedTransferQueue();
898
899		Thread t = newStartedThread(new CheckedRunnable() {
900	<	void realRun() {
900	>	public void realRun() {
901		while (! q.hasWaitingConsumer())
902		Thread.yield();
903	<	threadAssertTrue(q.hasWaitingConsumer());
904	<	threadAssertTrue(q.isEmpty());
905	<	threadAssertTrue(q.size() == 0);
980	<	threadAssertTrue(q.tryTransfer(hotPotato));
903	>	assertTrue(q.hasWaitingConsumer());
904	>	checkEmpty(q);
905	>	assertTrue(q.tryTransfer(hotPotato));
906		}});
907
908	<	assertTrue(q.poll(MEDIUM_DELAY_MS, MILLISECONDS) == hotPotato);
909	<	assertTrue(q.isEmpty());
910	<	t.join();
908	>	long startTime = System.nanoTime();
909	>	assertSame(hotPotato, q.poll(LONG_DELAY_MS, MILLISECONDS));
910	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
911	>	checkEmpty(q);
912	>	awaitTermination(t);
913		}
914
915		/**
#	Line 994 | Line 921 | public class LinkedTransferQueueTest ext
921		final LinkedTransferQueue q = new LinkedTransferQueue();
922
923		Thread t = newStartedThread(new CheckedRunnable() {
924	<	void realRun() {
924	>	public void realRun() {
925		while (! q.hasWaitingConsumer())
926		Thread.yield();
927	<	threadAssertTrue(q.hasWaitingConsumer());
928	<	threadAssertTrue(q.isEmpty());
929	<	threadAssertTrue(q.size() == 0);
1003	<	threadAssertTrue(q.tryTransfer(hotPotato));
927	>	assertTrue(q.hasWaitingConsumer());
928	>	checkEmpty(q);
929	>	assertTrue(q.tryTransfer(hotPotato));
930		}});
931
932	<	assertTrue(q.take() == hotPotato);
933	<	assertTrue(q.isEmpty());
934	<	t.join();
932	>	assertSame(q.take(), hotPotato);
933	>	checkEmpty(q);
934	>	awaitTermination(t);
935		}
936
937		/**
938	<	* tryTransfer waits the amount given if interrupted, and
1013	<	* throws interrupted exception
938	>	* tryTransfer blocks interruptibly if no takers
939		*/
940		public void testTryTransfer5() throws InterruptedException {
941		final LinkedTransferQueue q = new LinkedTransferQueue();
942	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
943	+	assertTrue(q.isEmpty());
944
945	<	Thread toInterrupt = newStartedThread(new CheckedInterruptedRunnable() {
946	<	void realRun() throws InterruptedException {
947	<	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
945	>	Thread t = newStartedThread(new CheckedRunnable() {
946	>	public void realRun() throws InterruptedException {
947	>	long startTime = System.nanoTime();
948	>	Thread.currentThread().interrupt();
949	>	try {
950	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
951	>	shouldThrow();
952	>	} catch (InterruptedException success) {}
953	>	assertFalse(Thread.interrupted());
954	>
955	>	pleaseInterrupt.countDown();
956	>	try {
957	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
958	>	shouldThrow();
959	>	} catch (InterruptedException success) {}
960	>	assertFalse(Thread.interrupted());
961	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
962		}});
963
964	<	Thread.sleep(SMALL_DELAY_MS);
965	<	toInterrupt.interrupt();
966	<	toInterrupt.join();
964	>	await(pleaseInterrupt);
965	>	assertThreadStaysAlive(t);
966	>	t.interrupt();
967	>	awaitTermination(t);
968	>	checkEmpty(q);
969		}
970
971		/**
972	<	* tryTransfer gives up after the timeout and return false
972	>	* tryTransfer gives up after the timeout and returns false
973		*/
974		public void testTryTransfer6() throws InterruptedException {
975		final LinkedTransferQueue q = new LinkedTransferQueue();
976
977		Thread t = newStartedThread(new CheckedRunnable() {
978	<	void realRun() throws InterruptedException {
979	<	threadAssertFalse
980	<	(q.tryTransfer(new Object(),
981	<	SHORT_DELAY_MS, MILLISECONDS));
978	>	public void realRun() throws InterruptedException {
979	>	long startTime = System.nanoTime();
980	>	assertFalse(q.tryTransfer(new Object(),
981	>	timeoutMillis(), MILLISECONDS));
982	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
983	>	checkEmpty(q);
984		}});
985
986	<	Thread.sleep(SMALL_DELAY_MS);
987	<	assertTrue(q.isEmpty());
1043	<	t.join();
986	>	awaitTermination(t);
987	>	checkEmpty(q);
988		}
989
990		/**
#	Line 1052 | Line 996 | public class LinkedTransferQueueTest ext
996		assertTrue(q.offer(four));
997
998		Thread t = newStartedThread(new CheckedRunnable() {
999	<	void realRun() throws InterruptedException {
1000	<	threadAssertTrue(q.tryTransfer(five,
1001	<	MEDIUM_DELAY_MS, MILLISECONDS));
1002	<	threadAssertTrue(q.isEmpty());
999	>	public void realRun() throws InterruptedException {
1000	>	long startTime = System.nanoTime();
1001	>	assertTrue(q.tryTransfer(five, LONG_DELAY_MS, MILLISECONDS));
1002	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1003	>	checkEmpty(q);
1004		}});
1005
1006	<	Thread.sleep(SHORT_DELAY_MS);
1006	>	while (q.size() != 2)
1007	>	Thread.yield();
1008		assertEquals(2, q.size());
1009	<	assertEquals(four, q.poll());
1010	<	assertEquals(five, q.poll());
1011	<	assertTrue(q.isEmpty());
1012	<	t.join();
1009	>	assertSame(four, q.poll());
1010	>	assertSame(five, q.poll());
1011	>	checkEmpty(q);
1012	>	awaitTermination(t);
1013		}
1014
1015		/**
1016	<	* tryTransfer attempts to enqueue into the q and fails returning
1017	<	* false not enqueueing and the successive poll is null
1016	>	* tryTransfer attempts to enqueue into the queue and fails
1017	>	* returning false not enqueueing and the successive poll is null
1018		*/
1019		public void testTryTransfer8() throws InterruptedException {
1020		final LinkedTransferQueue q = new LinkedTransferQueue();
1021		assertTrue(q.offer(four));
1022		assertEquals(1, q.size());
1023	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
1023	>	long startTime = System.nanoTime();
1024	>	assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
1025	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
1026		assertEquals(1, q.size());
1027	<	assertEquals(four, q.poll());
1080	<	threadAssertTrue(q.isEmpty());
1027	>	assertSame(four, q.poll());
1028		assertNull(q.poll());
1029	+	checkEmpty(q);
1030		}
1031
1032		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1033		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1034	<	assertTrue(q.isEmpty());
1034	>	checkEmpty(q);
1035		for (int i = 0; i < n; i++) {
1036		assertEquals(i, q.size());
1037		assertTrue(q.offer(i));
#	Line 1093 | Line 1041 | public class LinkedTransferQueueTest ext
1041		return q;
1042		}
1043
1044	<	private static class ConsumerObserver {
1045	<
1046	<	private int waitingConsumers;
1047	<
1048	<	private ConsumerObserver() {
1049	<	}
1050	<
1051	<	private void setWaitingConsumer(int i) {
1052	<	this.waitingConsumers = i;
1053	<	}
1054	<
1055	<	private int getWaitingConsumers() {
1108	<	return waitingConsumers;
1044	>	/**
1045	>	* remove(null), contains(null) always return false
1046	>	*/
1047	>	public void testNeverContainsNull() {
1048	>	Collection<?>[] qs = {
1049	>	new LinkedTransferQueue<Object>(),
1050	>	populatedQueue(2),
1051	>	};
1052	>
1053	>	for (Collection<?> q : qs) {
1054	>	assertFalse(q.contains(null));
1055	>	assertFalse(q.remove(null));
1056		}
1057		}
1058		}

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