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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 1.67 by jsr166, Sun Oct 16 20:16:36 2016 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	+	public static class Generic extends BlockingQueueTest {
28	+	protected BlockingQueue emptyCollection() {
29	+	return new LinkedTransferQueue();
30	+	}
31	+	}
32
33		public static void main(String[] args) {
34	<	junit.textui.TestRunner.run(suite());
34	>	main(suite(), args);
35		}
36
37		public static Test suite() {
38	<	return new TestSuite(LinkedTransferQueueTest.class);
38	>	class Implementation implements CollectionImplementation {
39	>	public Class<?> klazz() { return LinkedTransferQueue.class; }
40	>	public Collection emptyCollection() { return new LinkedTransferQueue(); }
41	>	public Object makeElement(int i) { return i; }
42	>	public boolean isConcurrent() { return true; }
43	>	public boolean permitsNulls() { return false; }
44	>	}
45	>	return newTestSuite(LinkedTransferQueueTest.class,
46	>	new Generic().testSuite(),
47	>	CollectionTest.testSuite(new Implementation()));
48		}
49
50		/**
#	Line 49 | Line 64 | public class LinkedTransferQueueTest ext
64		try {
65		new LinkedTransferQueue(null);
66		shouldThrow();
67	<	} catch (NullPointerException success) {
53	<	}
67	>	} catch (NullPointerException success) {}
68		}
69
70		/**
#	Line 58 | Line 72 | public class LinkedTransferQueueTest ext
72		* NullPointerException
73		*/
74		public void testConstructor3() {
75	+	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
76		try {
77	<	Integer[] ints = new Integer[SIZE];
63	<	new LinkedTransferQueue(Arrays.asList(ints));
77	>	new LinkedTransferQueue(elements);
78		shouldThrow();
79	<	} catch (NullPointerException success) {
66	<	}
79	>	} catch (NullPointerException success) {}
80		}
81
82		/**
#	Line 71 | Line 84 | public class LinkedTransferQueueTest ext
84		* throws NullPointerException
85		*/
86		public void testConstructor4() {
87	+	Integer[] ints = new Integer[SIZE];
88	+	for (int i = 0; i < SIZE - 1; ++i)
89	+	ints[i] = i;
90	+	Collection<Integer> elements = Arrays.asList(ints);
91		try {
92	<	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));
92	>	new LinkedTransferQueue(elements);
93		shouldThrow();
94	<	} catch (NullPointerException success) {
82	<	}
94	>	} catch (NullPointerException success) {}
95		}
96
97		/**
98		* Queue contains all elements of the collection it is initialized by
99		*/
100		public void testConstructor5() {
101	<	try {
102	<	Integer[] ints = new Integer[SIZE];
103	<	for (int i = 0; i < SIZE; ++i) {
104	<	ints[i] = i;
105	<	}
106	<	LinkedTransferQueue q
107	<	= new LinkedTransferQueue(Arrays.asList(ints));
108	<	for (int i = 0; i < SIZE; ++i) {
109	<	assertEquals(ints[i], q.poll());
110	<	}
111	<	} finally {
101	>	Integer[] ints = new Integer[SIZE];
102	>	for (int i = 0; i < SIZE; ++i) {
103	>	ints[i] = i;
104	>	}
105	>	List intList = Arrays.asList(ints);
106	>	LinkedTransferQueue q
107	>	= new LinkedTransferQueue(intList);
108	>	assertEquals(q.size(), intList.size());
109	>	assertEquals(q.toString(), intList.toString());
110	>	assertTrue(Arrays.equals(q.toArray(),
111	>	intList.toArray()));
112	>	assertTrue(Arrays.equals(q.toArray(new Object[0]),
113	>	intList.toArray(new Object[0])));
114	>	assertTrue(Arrays.equals(q.toArray(new Object[SIZE]),
115	>	intList.toArray(new Object[SIZE])));
116	>	for (int i = 0; i < SIZE; ++i) {
117	>	assertEquals(ints[i], q.poll());
118		}
119		}
120
121		/**
122	<	* Remaining capacity never decrease nor increase on add or remove
122	>	* remainingCapacity() always returns Integer.MAX_VALUE
123		*/
124		public void testRemainingCapacity() {
125	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
125	>	BlockingQueue q = populatedQueue(SIZE);
126		for (int i = 0; i < SIZE; ++i) {
127		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
128		assertEquals(SIZE - i, q.size());
129	<	q.remove();
129	>	assertEquals(i, q.remove());
130		}
131		for (int i = 0; i < SIZE; ++i) {
132		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
133		assertEquals(i, q.size());
134	<	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) {
134	>	assertTrue(q.add(i));
135		}
136		}
137
#	Line 157 | Line 139 | public class LinkedTransferQueueTest ext
139		* addAll(this) throws IllegalArgumentException
140		*/
141		public void testAddAllSelf() {
142	+	LinkedTransferQueue q = populatedQueue(SIZE);
143		try {
161	–	LinkedTransferQueue q = populatedQueue(SIZE);
144		q.addAll(q);
145		shouldThrow();
146	<	} 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	<	}
146	>	} catch (IllegalArgumentException success) {}
147		}
148
149		/**
#	Line 183 | Line 151 | public class LinkedTransferQueueTest ext
151		* NullPointerException after possibly adding some elements
152		*/
153		public void testAddAll3() {
154	+	LinkedTransferQueue q = new LinkedTransferQueue();
155	+	Integer[] ints = new Integer[SIZE];
156	+	for (int i = 0; i < SIZE - 1; ++i)
157	+	ints[i] = i;
158		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	–	}
159		q.addAll(Arrays.asList(ints));
160		shouldThrow();
161	<	} catch (NullPointerException success) {
195	<	}
161	>	} catch (NullPointerException success) {}
162		}
163
164		/**
#	Line 213 | Line 179 | public class LinkedTransferQueueTest ext
179		}
180
181		/**
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	–	/**
182		* all elements successfully put are contained
183		*/
184		public void testPut() {
185		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
186		for (int i = 0; i < SIZE; ++i) {
187	+	assertEquals(i, q.size());
188		q.put(i);
189		assertTrue(q.contains(i));
190		}
235	–	assertEquals(q.size(), SIZE);
191		}
192
193		/**
#	Line 246 | Line 201 | public class LinkedTransferQueueTest ext
201		}
202
203		/**
204	<	* 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
204	>	* take removes existing elements until empty, then blocks interruptibly
205		*/
206		public void testBlockingTake() throws InterruptedException {
207	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
208	<	void realRun() throws InterruptedException {
209	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
207	>	final BlockingQueue q = populatedQueue(SIZE);
208	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
209	>	Thread t = newStartedThread(new CheckedRunnable() {
210	>	public void realRun() throws InterruptedException {
211		for (int i = 0; i < SIZE; ++i) {
212	<	threadAssertEquals(i, (int) q.take());
212	>	assertEquals(i, q.take());
213		}
214	<	q.take();
214	>
215	>	Thread.currentThread().interrupt();
216	>	try {
217	>	q.take();
218	>	shouldThrow();
219	>	} catch (InterruptedException success) {}
220	>	assertFalse(Thread.interrupted());
221	>
222	>	pleaseInterrupt.countDown();
223	>	try {
224	>	q.take();
225	>	shouldThrow();
226	>	} catch (InterruptedException success) {}
227	>	assertFalse(Thread.interrupted());
228		}});
229	<	Thread.sleep(SHORT_DELAY_MS);
229	>
230	>	await(pleaseInterrupt);
231	>	assertThreadStaysAlive(t);
232		t.interrupt();
233	<	t.join();
233	>	awaitTermination(t);
234		}
235
236		/**
237		* poll succeeds unless empty
238		*/
239	<	public void testPoll() {
239	>	public void testPoll() throws InterruptedException {
240		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
241		for (int i = 0; i < SIZE; ++i) {
242		assertEquals(i, (int) q.poll());
243		}
244		assertNull(q.poll());
245	+	checkEmpty(q);
246		}
247
248		/**
249	<	* timed pool with zero timeout succeeds when non-empty, else times out
249	>	* timed poll with zero timeout succeeds when non-empty, else times out
250		*/
251		public void testTimedPoll0() throws InterruptedException {
252		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
#	Line 296 | Line 254 | public class LinkedTransferQueueTest ext
254		assertEquals(i, (int) q.poll(0, MILLISECONDS));
255		}
256		assertNull(q.poll(0, MILLISECONDS));
257	+	checkEmpty(q);
258		}
259
260		/**
261	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
261	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
262		*/
263		public void testTimedPoll() throws InterruptedException {
264		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
265	<	for (int i = 0; i < SIZE; ++i) {
266	<	assertEquals(i, (int) q.poll(SHORT_DELAY_MS, MILLISECONDS));
267	<	}
268	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
265	>	long startTime = System.nanoTime();
266	>	for (int i = 0; i < SIZE; ++i)
267	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
268	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
269	>
270	>	startTime = System.nanoTime();
271	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
272	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
273	>	checkEmpty(q);
274		}
275
276		/**
#	Line 314 | Line 278 | public class LinkedTransferQueueTest ext
278		* returning timeout status
279		*/
280		public void testInterruptedTimedPoll() throws InterruptedException {
281	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
282	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
283	<	void realRun() throws InterruptedException {
284	<	for (int i = 0; i < SIZE; ++i) {
285	<	threadAssertEquals(i, (int) q.poll(LONG_DELAY_MS,
286	<	MILLISECONDS));
287	<	}
288	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
281	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
282	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
283	>	Thread t = newStartedThread(new CheckedRunnable() {
284	>	public void realRun() throws InterruptedException {
285	>	long startTime = System.nanoTime();
286	>	for (int i = 0; i < SIZE; ++i)
287	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
288	>	aboutToWait.countDown();
289	>	try {
290	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
291	>	shouldThrow();
292	>	} catch (InterruptedException success) {}
293	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
294		}});
295	<	Thread.sleep(SMALL_DELAY_MS);
295	>
296	>	aboutToWait.await();
297	>	waitForThreadToEnterWaitState(t);
298		t.interrupt();
299	<	t.join();
300	<	assertEquals(q.size(), 0);
330	<	assertNull(q.poll());
299	>	awaitTermination(t);
300	>	checkEmpty(q);
301		}
302
303		/**
304	<	* timed poll before a delayed offer fails; after offer succeeds;
305	<	* on interruption throws
304	>	* timed poll after thread interrupted throws InterruptedException
305	>	* instead of returning timeout status
306		*/
307	<	public void testTimedPollWithOffer() throws InterruptedException {
308	<	final LinkedTransferQueue q = new LinkedTransferQueue();
309	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
310	<	void realRun() throws InterruptedException {
311	<	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
312	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
313	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
307	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
308	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
309	>	Thread t = newStartedThread(new CheckedRunnable() {
310	>	public void realRun() throws InterruptedException {
311	>	long startTime = System.nanoTime();
312	>	Thread.currentThread().interrupt();
313	>	for (int i = 0; i < SIZE; ++i)
314	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
315	>	try {
316	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
317	>	shouldThrow();
318	>	} catch (InterruptedException success) {}
319	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
320		}});
321	<	Thread.sleep(SMALL_DELAY_MS);
322	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
323	<	t.interrupt();
348	<	t.join();
321	>
322	>	awaitTermination(t);
323	>	checkEmpty(q);
324		}
325
326		/**
327		* peek returns next element, or null if empty
328		*/
329	<	public void testPeek() {
329	>	public void testPeek() throws InterruptedException {
330		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
331		for (int i = 0; i < SIZE; ++i) {
332		assertEquals(i, (int) q.peek());
#	Line 360 | Line 335 | public class LinkedTransferQueueTest ext
335		i != (int) q.peek());
336		}
337		assertNull(q.peek());
338	+	checkEmpty(q);
339		}
340
341		/**
342		* element returns next element, or throws NoSuchElementException if empty
343		*/
344	<	public void testElement() {
344	>	public void testElement() throws InterruptedException {
345		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
346		for (int i = 0; i < SIZE; ++i) {
347		assertEquals(i, (int) q.element());
#	Line 374 | Line 350 | public class LinkedTransferQueueTest ext
350		try {
351		q.element();
352		shouldThrow();
353	<	} catch (NoSuchElementException success) {
354	<	}
353	>	} catch (NoSuchElementException success) {}
354	>	checkEmpty(q);
355		}
356
357		/**
358		* remove removes next element, or throws NoSuchElementException if empty
359		*/
360	<	public void testRemove() {
360	>	public void testRemove() throws InterruptedException {
361		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
362		for (int i = 0; i < SIZE; ++i) {
363		assertEquals(i, (int) q.remove());
#	Line 389 | Line 365 | public class LinkedTransferQueueTest ext
365		try {
366		q.remove();
367		shouldThrow();
368	<	} catch (NoSuchElementException success) {
369	<	}
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());
368	>	} catch (NoSuchElementException success) {}
369	>	checkEmpty(q);
370		}
371
372		/**
#	Line 418 | Line 379 | public class LinkedTransferQueueTest ext
379		assertTrue(q.remove(one));
380		assertTrue(q.remove(two));
381		assertTrue(q.add(three));
382	<	assertTrue(q.take() != null);
382	>	assertSame(q.take(), three);
383		}
384
385		/**
#	Line 436 | Line 397 | public class LinkedTransferQueueTest ext
397		/**
398		* clear removes all elements
399		*/
400	<	public void testClear() {
400	>	public void testClear() throws InterruptedException {
401		LinkedTransferQueue q = populatedQueue(SIZE);
402		q.clear();
403	<	assertTrue(q.isEmpty());
443	<	assertEquals(0, q.size());
403	>	checkEmpty(q);
404		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
405		q.add(one);
406		assertFalse(q.isEmpty());
407	+	assertEquals(1, q.size());
408		assertTrue(q.contains(one));
409		q.clear();
410	<	assertTrue(q.isEmpty());
410	>	checkEmpty(q);
411		}
412
413		/**
#	Line 500 | Line 461 | public class LinkedTransferQueueTest ext
461		}
462
463		/**
464	<	* toArray contains all elements
464	>	* toArray() contains all elements in FIFO order
465		*/
466	<	public void testToArray() throws InterruptedException {
466	>	public void testToArray() {
467		LinkedTransferQueue q = populatedQueue(SIZE);
468		Object[] o = q.toArray();
469		for (int i = 0; i < o.length; i++) {
470	<	assertEquals(o[i], q.take());
470	>	assertSame(o[i], q.poll());
471		}
472		}
473
474		/**
475	<	* toArray(a) contains all elements
475	>	* toArray(a) contains all elements in FIFO order
476		*/
477	<	public void testToArray2() throws InterruptedException {
477	>	public void testToArray2() {
478		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
479		Integer[] ints = new Integer[SIZE];
480	<	ints = q.toArray(ints);
480	>	Integer[] array = q.toArray(ints);
481	>	assertSame(ints, array);
482		for (int i = 0; i < ints.length; i++) {
483	<	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) {
483	>	assertSame(ints[i], q.poll());
484		}
485		}
486
487		/**
488	<	* toArray with incompatible array type throws CCE
488	>	* toArray(incompatible array type) throws ArrayStoreException
489		*/
490		public void testToArray1_BadArg() {
491	+	LinkedTransferQueue q = populatedQueue(SIZE);
492		try {
493	<	LinkedTransferQueue q = populatedQueue(SIZE);
543	<	Object o[] = q.toArray(new String[10]);
493	>	q.toArray(new String[10]);
494		shouldThrow();
495	<	} catch (ArrayStoreException success) {
546	<	}
495	>	} catch (ArrayStoreException success) {}
496		}
497
498		/**
#	Line 552 | Line 501 | public class LinkedTransferQueueTest ext
501		public void testIterator() throws InterruptedException {
502		LinkedTransferQueue q = populatedQueue(SIZE);
503		Iterator it = q.iterator();
504	<	int i = 0;
505	<	while (it.hasNext()) {
506	<	assertEquals(it.next(), i++);
558	<	}
504	>	int i;
505	>	for (i = 0; it.hasNext(); i++)
506	>	assertTrue(q.contains(it.next()));
507		assertEquals(i, SIZE);
508	+	assertIteratorExhausted(it);
509	+
510	+	it = q.iterator();
511	+	for (i = 0; it.hasNext(); i++)
512	+	assertEquals(it.next(), q.take());
513	+	assertEquals(i, SIZE);
514	+	assertIteratorExhausted(it);
515		}
516
517		/**
518	<	* iterator.remove removes current element
518	>	* iterator of empty collection has no elements
519	>	*/
520	>	public void testEmptyIterator() {
521	>	assertIteratorExhausted(new LinkedTransferQueue().iterator());
522	>	}
523	>
524	>	/**
525	>	* iterator.remove() removes current element
526		*/
527		public void testIteratorRemove() {
528		final LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 573 | Line 535 | public class LinkedTransferQueueTest ext
535		it.remove();
536
537		it = q.iterator();
538	<	assertEquals(it.next(), one);
539	<	assertEquals(it.next(), three);
538	>	assertSame(it.next(), one);
539	>	assertSame(it.next(), three);
540		assertFalse(it.hasNext());
541		}
542
#	Line 618 | Line 580 | public class LinkedTransferQueueTest ext
580		LinkedTransferQueue q = populatedQueue(SIZE);
581		String s = q.toString();
582		for (int i = 0; i < SIZE; ++i) {
583	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
583	>	assertTrue(s.contains(String.valueOf(i)));
584		}
585		}
586
#	Line 627 | Line 589 | public class LinkedTransferQueueTest ext
589		*/
590		public void testOfferInExecutor() {
591		final LinkedTransferQueue q = new LinkedTransferQueue();
592	<	q.add(one);
593	<	q.add(two);
594	<	ExecutorService executor = Executors.newFixedThreadPool(2);
595	<
596	<	executor.execute(new CheckedRunnable() {
597	<	void realRun() {
598	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS,
599	<	MILLISECONDS));
600	<	}});
601	<
602	<	executor.execute(new CheckedRunnable() {
641	<	void realRun() throws InterruptedException {
642	<	Thread.sleep(SMALL_DELAY_MS);
643	<	threadAssertEquals(one, q.take());
644	<	}});
592	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
593	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
594	>	try (PoolCleaner cleaner = cleaner(executor)) {
595	>
596	>	executor.execute(new CheckedRunnable() {
597	>	public void realRun() throws InterruptedException {
598	>	threadsStarted.await();
599	>	long startTime = System.nanoTime();
600	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
601	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
602	>	}});
603
604	<	joinPool(executor);
604	>	executor.execute(new CheckedRunnable() {
605	>	public void realRun() throws InterruptedException {
606	>	threadsStarted.await();
607	>	assertSame(one, q.take());
608	>	checkEmpty(q);
609	>	}});
610	>	}
611		}
612
613		/**
614	<	* poll retrieves elements across Executor threads
614	>	* timed poll retrieves elements across Executor threads
615		*/
616		public void testPollInExecutor() {
617		final LinkedTransferQueue q = new LinkedTransferQueue();
618	<	ExecutorService executor = Executors.newFixedThreadPool(2);
619	<
620	<	executor.execute(new CheckedRunnable() {
621	<	void realRun() throws InterruptedException {
622	<	threadAssertNull(q.poll());
623	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS,
624	<	MILLISECONDS));
625	<	threadAssertTrue(q.isEmpty());
626	<	}});
627	<
628	<	executor.execute(new CheckedRunnable() {
629	<	void realRun() throws InterruptedException {
630	<	Thread.sleep(SMALL_DELAY_MS);
667	<	q.put(one);
668	<	}});
618	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
619	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
620	>	try (PoolCleaner cleaner = cleaner(executor)) {
621	>
622	>	executor.execute(new CheckedRunnable() {
623	>	public void realRun() throws InterruptedException {
624	>	assertNull(q.poll());
625	>	threadsStarted.await();
626	>	long startTime = System.nanoTime();
627	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
628	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
629	>	checkEmpty(q);
630	>	}});
631
632	<	joinPool(executor);
632	>	executor.execute(new CheckedRunnable() {
633	>	public void realRun() throws InterruptedException {
634	>	threadsStarted.await();
635	>	q.put(one);
636	>	}});
637	>	}
638		}
639
640		/**
641		* A deserialized serialized queue has same elements in same order
642		*/
643		public void testSerialization() throws Exception {
644	<	LinkedTransferQueue q = populatedQueue(SIZE);
645	<
679	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
680	<	ObjectOutputStream out
681	<	= new ObjectOutputStream(new BufferedOutputStream(bout));
682	<	out.writeObject(q);
683	<	out.close();
684	<
685	<	ByteArrayInputStream bin
686	<	= new ByteArrayInputStream(bout.toByteArray());
687	<	ObjectInputStream in
688	<	= new ObjectInputStream(new BufferedInputStream(bin));
689	<	LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
690	<
691	<	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	<	}
644	>	Queue x = populatedQueue(SIZE);
645	>	Queue y = serialClone(x);
646
647	<	/**
648	<	* drainTo(this) throws IllegalArgumentException
649	<	*/
650	<	public void testDrainToSelf() {
651	<	LinkedTransferQueue q = populatedQueue(SIZE);
652	<	try {
653	<	q.drainTo(q);
716	<	shouldThrow();
717	<	} catch (IllegalArgumentException success) {
647	>	assertNotSame(y, x);
648	>	assertEquals(x.size(), y.size());
649	>	assertEquals(x.toString(), y.toString());
650	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
651	>	while (!x.isEmpty()) {
652	>	assertFalse(y.isEmpty());
653	>	assertEquals(x.remove(), y.remove());
654		}
655	+	assertTrue(y.isEmpty());
656		}
657
658		/**
#	Line 725 | Line 662 | public class LinkedTransferQueueTest ext
662		LinkedTransferQueue q = populatedQueue(SIZE);
663		ArrayList l = new ArrayList();
664		q.drainTo(l);
665	<	assertEquals(q.size(), 0);
666	<	assertEquals(l.size(), SIZE);
665	>	assertEquals(0, q.size());
666	>	assertEquals(SIZE, l.size());
667		for (int i = 0; i < SIZE; ++i) {
668	<	assertEquals(l.get(i), i);
668	>	assertEquals(i, l.get(i));
669		}
670		q.add(zero);
671		q.add(one);
#	Line 737 | Line 674 | public class LinkedTransferQueueTest ext
674		assertTrue(q.contains(one));
675		l.clear();
676		q.drainTo(l);
677	<	assertEquals(q.size(), 0);
678	<	assertEquals(l.size(), 2);
677	>	assertEquals(0, q.size());
678	>	assertEquals(2, l.size());
679		for (int i = 0; i < 2; ++i) {
680	<	assertEquals(l.get(i), i);
680	>	assertEquals(i, l.get(i));
681		}
682		}
683
684		/**
685	<	* drainTo empties full queue, unblocking a waiting put.
685	>	* drainTo(c) empties full queue, unblocking a waiting put.
686		*/
687		public void testDrainToWithActivePut() throws InterruptedException {
688		final LinkedTransferQueue q = populatedQueue(SIZE);
689		Thread t = newStartedThread(new CheckedRunnable() {
690	<	void realRun() {
690	>	public void realRun() {
691		q.put(SIZE + 1);
692		}});
693		ArrayList l = new ArrayList();
694		q.drainTo(l);
695		assertTrue(l.size() >= SIZE);
696	<	for (int i = 0; i < SIZE; ++i) {
697	<	assertEquals(l.get(i), i);
698	<	}
762	<	t.join();
696	>	for (int i = 0; i < SIZE; ++i)
697	>	assertEquals(i, l.get(i));
698	>	awaitTermination(t);
699		assertTrue(q.size() + l.size() >= SIZE);
700		}
701
702		/**
703	<	* 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
703	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
704		*/
705		public void testDrainToN() {
706		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 799 | Line 711 | public class LinkedTransferQueueTest ext
711		ArrayList l = new ArrayList();
712		q.drainTo(l, i);
713		int k = (i < SIZE) ? i : SIZE;
714	<	assertEquals(l.size(), k);
715	<	assertEquals(q.size(), SIZE - k);
716	<	for (int j = 0; j < k; ++j) {
717	<	assertEquals(l.get(j), j);
718	<	}
807	<	while (q.poll() != null)
808	<	;
714	>	assertEquals(k, l.size());
715	>	assertEquals(SIZE - k, q.size());
716	>	for (int j = 0; j < k; ++j)
717	>	assertEquals(j, l.get(j));
718	>	do {} while (q.poll() != null);
719		}
720		}
721
722		/**
723	<	* poll and take decrement the waiting consumer count
723	>	* timed poll() or take() increments the waiting consumer count;
724	>	* offer(e) decrements the waiting consumer count
725		*/
726		public void testWaitingConsumer() throws InterruptedException {
727		final LinkedTransferQueue q = new LinkedTransferQueue();
728	<	final ConsumerObserver waiting = new ConsumerObserver();
728	>	assertEquals(0, q.getWaitingConsumerCount());
729	>	assertFalse(q.hasWaitingConsumer());
730	>	final CountDownLatch threadStarted = new CountDownLatch(1);
731
732		Thread t = newStartedThread(new CheckedRunnable() {
733	<	void realRun() throws InterruptedException {
734	<	Thread.sleep(SMALL_DELAY_MS);
735	<	threadAssertTrue(q.hasWaitingConsumer());
736	<	waiting.setWaitingConsumer(q.getWaitingConsumerCount());
737	<	threadAssertTrue(q.offer(new Object()));
733	>	public void realRun() throws InterruptedException {
734	>	threadStarted.countDown();
735	>	long startTime = System.nanoTime();
736	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
737	>	assertEquals(0, q.getWaitingConsumerCount());
738	>	assertFalse(q.hasWaitingConsumer());
739	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
740		}});
741
742	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) != null);
743	<	assertTrue(q.getWaitingConsumerCount()
744	<	< waiting.getWaitingConsumers());
745	<	t.join();
742	>	threadStarted.await();
743	>	waitForThreadToEnterWaitState(t);
744	>	assertEquals(1, q.getWaitingConsumerCount());
745	>	assertTrue(q.hasWaitingConsumer());
746	>
747	>	assertTrue(q.offer(one));
748	>	assertEquals(0, q.getWaitingConsumerCount());
749	>	assertFalse(q.hasWaitingConsumer());
750	>
751	>	awaitTermination(t);
752		}
753
754		/**
#	Line 838 | Line 759 | public class LinkedTransferQueueTest ext
759		LinkedTransferQueue q = new LinkedTransferQueue();
760		q.transfer(null);
761		shouldThrow();
762	<	} catch (NullPointerException ex) {
842	<	}
762	>	} catch (NullPointerException success) {}
763		}
764
765		/**
#	Line 849 | Line 769 | public class LinkedTransferQueueTest ext
769		public void testTransfer2() throws InterruptedException {
770		final LinkedTransferQueue<Integer> q
771		= new LinkedTransferQueue<Integer>();
772	+	final CountDownLatch threadStarted = new CountDownLatch(1);
773
774		Thread t = newStartedThread(new CheckedRunnable() {
775	<	void realRun() throws InterruptedException {
776	<	q.transfer(SIZE);
777	<	threadAssertTrue(q.isEmpty());
775	>	public void realRun() throws InterruptedException {
776	>	threadStarted.countDown();
777	>	q.transfer(five);
778	>	checkEmpty(q);
779		}});
780
781	<	Thread.sleep(SHORT_DELAY_MS);
781	>	threadStarted.await();
782	>	waitForThreadToEnterWaitState(t);
783		assertEquals(1, q.size());
784	<	assertEquals(SIZE, (int) q.poll());
785	<	assertTrue(q.isEmpty());
786	<	t.join();
784	>	assertSame(five, q.poll());
785	>	checkEmpty(q);
786	>	awaitTermination(t);
787		}
788
789		/**
#	Line 871 | Line 794 | public class LinkedTransferQueueTest ext
794		= new LinkedTransferQueue<Integer>();
795
796		Thread first = newStartedThread(new CheckedRunnable() {
797	<	void realRun() throws InterruptedException {
798	<	Integer i = SIZE + 1;
799	<	q.transfer(i);
800	<	threadAssertTrue(!q.contains(i));
878	<	threadAssertEquals(1, q.size());
797	>	public void realRun() throws InterruptedException {
798	>	q.transfer(four);
799	>	assertTrue(!q.contains(four));
800	>	assertEquals(1, q.size());
801		}});
802
803		Thread interruptedThread = newStartedThread(
804		new CheckedInterruptedRunnable() {
805	<	void realRun() throws InterruptedException {
806	<	while (q.size() == 0)
805	>	public void realRun() throws InterruptedException {
806	>	while (q.isEmpty())
807		Thread.yield();
808	<	q.transfer(SIZE);
808	>	q.transfer(five);
809		}});
810
811		while (q.size() < 2)
812		Thread.yield();
813		assertEquals(2, q.size());
814	<	assertEquals(SIZE + 1, (int) q.poll());
814	>	assertSame(four, q.poll());
815		first.join();
816		assertEquals(1, q.size());
817		interruptedThread.interrupt();
818		interruptedThread.join();
819	<	assertEquals(0, q.size());
898	<	assertTrue(q.isEmpty());
819	>	checkEmpty(q);
820		}
821
822		/**
#	Line 906 | Line 827 | public class LinkedTransferQueueTest ext
827		final LinkedTransferQueue q = new LinkedTransferQueue();
828
829		Thread t = newStartedThread(new CheckedRunnable() {
830	<	void realRun() throws InterruptedException {
830	>	public void realRun() throws InterruptedException {
831		q.transfer(four);
832	<	threadAssertFalse(q.contains(four));
833	<	threadAssertEquals(three, q.poll());
832	>	assertFalse(q.contains(four));
833	>	assertSame(three, q.poll());
834		}});
835
836	<	Thread.sleep(SHORT_DELAY_MS);
836	>	while (q.isEmpty())
837	>	Thread.yield();
838	>	assertFalse(q.isEmpty());
839	>	assertEquals(1, q.size());
840		assertTrue(q.offer(three));
841	<	assertEquals(four, q.poll());
842	<	t.join();
841	>	assertSame(four, q.poll());
842	>	awaitTermination(t);
843		}
844
845		/**
#	Line 927 | Line 851 | public class LinkedTransferQueueTest ext
851		= new LinkedTransferQueue<Integer>();
852
853		Thread t = newStartedThread(new CheckedRunnable() {
854	<	void realRun() throws InterruptedException {
855	<	q.transfer(SIZE);
856	<	threadAssertTrue(q.isEmpty());
854	>	public void realRun() throws InterruptedException {
855	>	q.transfer(four);
856	>	checkEmpty(q);
857		}});
858
859	<	Thread.sleep(SHORT_DELAY_MS);
860	<	assertEquals(SIZE, (int) q.take());
861	<	assertTrue(q.isEmpty());
862	<	t.join();
859	>	while (q.isEmpty())
860	>	Thread.yield();
861	>	assertFalse(q.isEmpty());
862	>	assertEquals(1, q.size());
863	>	assertSame(four, q.take());
864	>	checkEmpty(q);
865	>	awaitTermination(t);
866		}
867
868		/**
869		* tryTransfer(null) throws NullPointerException
870		*/
871		public void testTryTransfer1() {
872	+	final LinkedTransferQueue q = new LinkedTransferQueue();
873		try {
946	–	final LinkedTransferQueue q = new LinkedTransferQueue();
874		q.tryTransfer(null);
875		shouldThrow();
876	<	} catch (NullPointerException ex) {
950	<	}
876	>	} catch (NullPointerException success) {}
877		}
878
879		/**
880		* tryTransfer returns false and does not enqueue if there are no
881		* consumers waiting to poll or take.
882		*/
883	<	public void testTryTransfer2() {
883	>	public void testTryTransfer2() throws InterruptedException {
884		final LinkedTransferQueue q = new LinkedTransferQueue();
885		assertFalse(q.tryTransfer(new Object()));
886		assertFalse(q.hasWaitingConsumer());
887	<	assertTrue(q.isEmpty());
962	<	assertEquals(0, q.size());
887	>	checkEmpty(q);
888		}
889
890		/**
#	Line 971 | Line 896 | public class LinkedTransferQueueTest ext
896		final LinkedTransferQueue q = new LinkedTransferQueue();
897
898		Thread t = newStartedThread(new CheckedRunnable() {
899	<	void realRun() {
899	>	public void realRun() {
900		while (! q.hasWaitingConsumer())
901		Thread.yield();
902	<	threadAssertTrue(q.hasWaitingConsumer());
903	<	threadAssertTrue(q.isEmpty());
904	<	threadAssertTrue(q.size() == 0);
980	<	threadAssertTrue(q.tryTransfer(hotPotato));
902	>	assertTrue(q.hasWaitingConsumer());
903	>	checkEmpty(q);
904	>	assertTrue(q.tryTransfer(hotPotato));
905		}});
906
907	<	assertTrue(q.poll(MEDIUM_DELAY_MS, MILLISECONDS) == hotPotato);
908	<	assertTrue(q.isEmpty());
909	<	t.join();
907	>	long startTime = System.nanoTime();
908	>	assertSame(hotPotato, q.poll(LONG_DELAY_MS, MILLISECONDS));
909	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
910	>	checkEmpty(q);
911	>	awaitTermination(t);
912		}
913
914		/**
#	Line 994 | Line 920 | public class LinkedTransferQueueTest ext
920		final LinkedTransferQueue q = new LinkedTransferQueue();
921
922		Thread t = newStartedThread(new CheckedRunnable() {
923	<	void realRun() {
923	>	public void realRun() {
924		while (! q.hasWaitingConsumer())
925		Thread.yield();
926	<	threadAssertTrue(q.hasWaitingConsumer());
927	<	threadAssertTrue(q.isEmpty());
928	<	threadAssertTrue(q.size() == 0);
1003	<	threadAssertTrue(q.tryTransfer(hotPotato));
926	>	assertTrue(q.hasWaitingConsumer());
927	>	checkEmpty(q);
928	>	assertTrue(q.tryTransfer(hotPotato));
929		}});
930
931	<	assertTrue(q.take() == hotPotato);
932	<	assertTrue(q.isEmpty());
933	<	t.join();
931	>	assertSame(q.take(), hotPotato);
932	>	checkEmpty(q);
933	>	awaitTermination(t);
934		}
935
936		/**
937	<	* tryTransfer waits the amount given if interrupted, and
1013	<	* throws interrupted exception
937	>	* tryTransfer blocks interruptibly if no takers
938		*/
939		public void testTryTransfer5() throws InterruptedException {
940		final LinkedTransferQueue q = new LinkedTransferQueue();
941	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
942	+	assertTrue(q.isEmpty());
943
944	<	Thread toInterrupt = newStartedThread(new CheckedInterruptedRunnable() {
945	<	void realRun() throws InterruptedException {
946	<	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
944	>	Thread t = newStartedThread(new CheckedRunnable() {
945	>	public void realRun() throws InterruptedException {
946	>	long startTime = System.nanoTime();
947	>	Thread.currentThread().interrupt();
948	>	try {
949	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
950	>	shouldThrow();
951	>	} catch (InterruptedException success) {}
952	>	assertFalse(Thread.interrupted());
953	>
954	>	pleaseInterrupt.countDown();
955	>	try {
956	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
957	>	shouldThrow();
958	>	} catch (InterruptedException success) {}
959	>	assertFalse(Thread.interrupted());
960	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
961		}});
962
963	<	Thread.sleep(SMALL_DELAY_MS);
964	<	toInterrupt.interrupt();
965	<	toInterrupt.join();
963	>	await(pleaseInterrupt);
964	>	assertThreadStaysAlive(t);
965	>	t.interrupt();
966	>	awaitTermination(t);
967	>	checkEmpty(q);
968		}
969
970		/**
971	<	* tryTransfer gives up after the timeout and return false
971	>	* tryTransfer gives up after the timeout and returns false
972		*/
973		public void testTryTransfer6() throws InterruptedException {
974		final LinkedTransferQueue q = new LinkedTransferQueue();
975
976		Thread t = newStartedThread(new CheckedRunnable() {
977	<	void realRun() throws InterruptedException {
978	<	threadAssertFalse
979	<	(q.tryTransfer(new Object(),
980	<	SHORT_DELAY_MS, MILLISECONDS));
977	>	public void realRun() throws InterruptedException {
978	>	long startTime = System.nanoTime();
979	>	assertFalse(q.tryTransfer(new Object(),
980	>	timeoutMillis(), MILLISECONDS));
981	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
982	>	checkEmpty(q);
983		}});
984
985	<	Thread.sleep(SMALL_DELAY_MS);
986	<	assertTrue(q.isEmpty());
1043	<	t.join();
985	>	awaitTermination(t);
986	>	checkEmpty(q);
987		}
988
989		/**
#	Line 1052 | Line 995 | public class LinkedTransferQueueTest ext
995		assertTrue(q.offer(four));
996
997		Thread t = newStartedThread(new CheckedRunnable() {
998	<	void realRun() throws InterruptedException {
999	<	threadAssertTrue(q.tryTransfer(five,
1000	<	MEDIUM_DELAY_MS, MILLISECONDS));
1001	<	threadAssertTrue(q.isEmpty());
998	>	public void realRun() throws InterruptedException {
999	>	long startTime = System.nanoTime();
1000	>	assertTrue(q.tryTransfer(five, LONG_DELAY_MS, MILLISECONDS));
1001	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1002	>	checkEmpty(q);
1003		}});
1004
1005	<	Thread.sleep(SHORT_DELAY_MS);
1005	>	while (q.size() != 2)
1006	>	Thread.yield();
1007		assertEquals(2, q.size());
1008	<	assertEquals(four, q.poll());
1009	<	assertEquals(five, q.poll());
1010	<	assertTrue(q.isEmpty());
1011	<	t.join();
1008	>	assertSame(four, q.poll());
1009	>	assertSame(five, q.poll());
1010	>	checkEmpty(q);
1011	>	awaitTermination(t);
1012		}
1013
1014		/**
1015	<	* tryTransfer attempts to enqueue into the q and fails returning
1016	<	* false not enqueueing and the successive poll is null
1015	>	* tryTransfer attempts to enqueue into the queue and fails
1016	>	* returning false not enqueueing and the successive poll is null
1017		*/
1018		public void testTryTransfer8() throws InterruptedException {
1019		final LinkedTransferQueue q = new LinkedTransferQueue();
1020		assertTrue(q.offer(four));
1021		assertEquals(1, q.size());
1022	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
1022	>	long startTime = System.nanoTime();
1023	>	assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
1024	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
1025		assertEquals(1, q.size());
1026	<	assertEquals(four, q.poll());
1080	<	threadAssertTrue(q.isEmpty());
1026	>	assertSame(four, q.poll());
1027		assertNull(q.poll());
1028	+	checkEmpty(q);
1029		}
1030
1031		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1032		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1033	<	assertTrue(q.isEmpty());
1033	>	checkEmpty(q);
1034		for (int i = 0; i < n; i++) {
1035		assertEquals(i, q.size());
1036		assertTrue(q.offer(i));
#	Line 1093 | Line 1040 | public class LinkedTransferQueueTest ext
1040		return q;
1041		}
1042
1043	<	private static class ConsumerObserver {
1044	<
1045	<	private int waitingConsumers;
1046	<
1047	<	private ConsumerObserver() {
1048	<	}
1049	<
1050	<	private void setWaitingConsumer(int i) {
1051	<	this.waitingConsumers = i;
1052	<	}
1053	<
1054	<	private int getWaitingConsumers() {
1108	<	return waitingConsumers;
1043	>	/**
1044	>	* remove(null), contains(null) always return false
1045	>	*/
1046	>	public void testNeverContainsNull() {
1047	>	Collection<?>[] qs = {
1048	>	new LinkedTransferQueue<Object>(),
1049	>	populatedQueue(2),
1050	>	};
1051	>
1052	>	for (Collection<?> q : qs) {
1053	>	assertFalse(q.contains(null));
1054	>	assertFalse(q.remove(null));
1055		}
1056		}
1057		}

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