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

Comparing jsr166/src/test/tck/LinkedTransferQueueTest.java (file contents):
Revision 1.9 by jsr166, Wed Aug 5 00:43:23 2009 UTC vs.
Revision 1.65 by jsr166, Tue Oct 6 00:36:55 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 48 | Line 65 | public class LinkedTransferQueueTest ext
65		try {
66		new LinkedTransferQueue(null);
67		shouldThrow();
68	<	} catch (NullPointerException success) {
52	<	}
68	>	} catch (NullPointerException success) {}
69		}
70
71		/**
#	Line 57 | 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];
62	<	new LinkedTransferQueue(Arrays.asList(ints));
78	>	new LinkedTransferQueue(elements);
79		shouldThrow();
80	<	} catch (NullPointerException success) {
65	<	}
80	>	} catch (NullPointerException success) {}
81		}
82
83		/**
#	Line 70 | 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];
75	<	for (int i = 0; i < SIZE - 1; ++i) {
76	<	ints[i] = i;
77	<	}
78	<	new LinkedTransferQueue(Arrays.asList(ints));
93	>	new LinkedTransferQueue(elements);
94		shouldThrow();
95	<	} catch (NullPointerException success) {
81	<	}
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);
116	<	}
117	<	}
118	<
119	<	/**
120	<	* offer(null) throws NullPointerException
121	<	*/
122	<	public void testOfferNull() {
123	<	try {
124	<	LinkedTransferQueue q = new LinkedTransferQueue();
125	<	q.offer(null);
126	<	shouldThrow();
127	<	} catch (NullPointerException success) {
128	<	}
129	<	}
130	<
131	<	/**
132	<	* add(null) throws NullPointerException
133	<	*/
134	<	public void testAddNull() {
135	<	try {
136	<	LinkedTransferQueue q = new LinkedTransferQueue();
137	<	q.add(null);
138	<	shouldThrow();
139	<	} catch (NullPointerException success) {
140	<	}
141	<	}
142	<
143	<	/**
144	<	* addAll(null) throws NullPointerException
145	<	*/
146	<	public void testAddAll1() {
147	<	try {
148	<	LinkedTransferQueue q = new LinkedTransferQueue();
149	<	q.addAll(null);
150	<	shouldThrow();
151	<	} catch (NullPointerException success) {
135	>	assertTrue(q.add(i));
136		}
137		}
138
#	Line 156 | Line 140 | public class LinkedTransferQueueTest ext
140		* addAll(this) throws IllegalArgumentException
141		*/
142		public void testAddAllSelf() {
143	+	LinkedTransferQueue q = populatedQueue(SIZE);
144		try {
160	–	LinkedTransferQueue q = populatedQueue(SIZE);
145		q.addAll(q);
146		shouldThrow();
147	<	} catch (IllegalArgumentException success) {
164	<	}
165	<	}
166	<
167	<	/**
168	<	* addAll of a collection with null elements throws NullPointerException
169	<	*/
170	<	public void testAddAll2() {
171	<	try {
172	<	LinkedTransferQueue q = new LinkedTransferQueue();
173	<	Integer[] ints = new Integer[SIZE];
174	<	q.addAll(Arrays.asList(ints));
175	<	shouldThrow();
176	<	} catch (NullPointerException success) {
177	<	}
147	>	} catch (IllegalArgumentException success) {}
148		}
149
150		/**
#	Line 182 | 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 {
186	–	LinkedTransferQueue q = new LinkedTransferQueue();
187	–	Integer[] ints = new Integer[SIZE];
188	–	for (int i = 0; i < SIZE - 1; ++i) {
189	–	ints[i] = i;
190	–	}
160		q.addAll(Arrays.asList(ints));
161		shouldThrow();
162	<	} catch (NullPointerException success) {
194	<	}
162	>	} catch (NullPointerException success) {}
163		}
164
165		/**
#	Line 212 | Line 180 | public class LinkedTransferQueueTest ext
180		}
181
182		/**
215	–	* put(null) throws NullPointerException
216	–	*/
217	–	public void testPutNull() throws InterruptedException {
218	–	try {
219	–	LinkedTransferQueue q = new LinkedTransferQueue();
220	–	q.put(null);
221	–	shouldThrow();
222	–	} catch (NullPointerException success) {}
223	–	}
224	–
225	–	/**
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		}
234	–	assertEquals(q.size(), SIZE);
192		}
193
194		/**
#	Line 245 | Line 202 | public class LinkedTransferQueueTest ext
202		}
203
204		/**
205	<	* take blocks interruptibly when empty
249	<	*/
250	<	public void testTakeFromEmpty() throws InterruptedException {
251	<	final LinkedTransferQueue q = new LinkedTransferQueue();
252	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
253	<	void realRun() throws InterruptedException {
254	<	q.take();
255	<	}});
256	<	Thread.sleep(SHORT_DELAY_MS);
257	<	t.interrupt();
258	<	t.join();
259	<	}
260	<
261	<	/**
262	<	* 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 295 | 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));
267	>	long startTime = System.nanoTime();
268	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
269	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
270	>	}
271	>	long startTime = System.nanoTime();
272	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
273	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
274	>	checkEmpty(q);
275		}
276
277		/**
#	Line 313 | 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 {
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	<	threadAssertEquals(i, (int) q.poll(LONG_DELAY_MS,
289	<	MILLISECONDS));
288	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
289	>	}
290	>	aboutToWait.countDown();
291	>	try {
292	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
293	>	shouldThrow();
294	>	} catch (InterruptedException success) {
295	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
296		}
323	–	q.poll(LONG_DELAY_MS, MILLISECONDS);
297		}});
298	<	Thread.sleep(SMALL_DELAY_MS);
298	>
299	>	aboutToWait.await();
300	>	waitForThreadToEnterWaitState(t, LONG_DELAY_MS);
301		t.interrupt();
302	<	t.join();
303	<	assertEquals(q.size(), 0);
329	<	assertNull(q.poll());
302	>	awaitTermination(t);
303	>	checkEmpty(q);
304		}
305
306		/**
307	<	* timed poll before a delayed offer fails; after offer succeeds;
308	<	* on interruption throws
307	>	* timed poll after thread interrupted throws InterruptedException
308	>	* instead of returning timeout status
309		*/
310	<	public void testTimedPollWithOffer() throws InterruptedException {
311	<	final LinkedTransferQueue q = new LinkedTransferQueue();
312	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
313	<	void realRun() throws InterruptedException {
314	<	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
315	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
316	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
310	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
311	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
312	>	Thread t = newStartedThread(new CheckedRunnable() {
313	>	public void realRun() throws InterruptedException {
314	>	Thread.currentThread().interrupt();
315	>	for (int i = 0; i < SIZE; ++i) {
316	>	long startTime = System.nanoTime();
317	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
318	>	assertTrue(millisElapsedSince(startTime) < SMALL_DELAY_MS);
319	>	}
320	>	try {
321	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
322	>	shouldThrow();
323	>	} catch (InterruptedException success) {}
324		}});
325	<	Thread.sleep(SMALL_DELAY_MS);
326	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
327	<	t.interrupt();
347	<	t.join();
325	>
326	>	awaitTermination(t, MEDIUM_DELAY_MS);
327	>	checkEmpty(q);
328		}
329
330		/**
331		* peek returns next element, or null if empty
332		*/
333	<	public void testPeek() {
333	>	public void testPeek() throws InterruptedException {
334		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
335		for (int i = 0; i < SIZE; ++i) {
336		assertEquals(i, (int) q.peek());
#	Line 359 | Line 339 | public class LinkedTransferQueueTest ext
339		i != (int) q.peek());
340		}
341		assertNull(q.peek());
342	+	checkEmpty(q);
343		}
344
345		/**
346		* element returns next element, or throws NoSuchElementException if empty
347		*/
348	<	public void testElement() {
348	>	public void testElement() throws InterruptedException {
349		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
350		for (int i = 0; i < SIZE; ++i) {
351		assertEquals(i, (int) q.element());
#	Line 373 | Line 354 | public class LinkedTransferQueueTest ext
354		try {
355		q.element();
356		shouldThrow();
357	<	} catch (NoSuchElementException success) {
358	<	}
357	>	} catch (NoSuchElementException success) {}
358	>	checkEmpty(q);
359		}
360
361		/**
362		* remove removes next element, or throws NoSuchElementException if empty
363		*/
364	<	public void testRemove() {
364	>	public void testRemove() throws InterruptedException {
365		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
366		for (int i = 0; i < SIZE; ++i) {
367		assertEquals(i, (int) q.remove());
#	Line 388 | Line 369 | public class LinkedTransferQueueTest ext
369		try {
370		q.remove();
371		shouldThrow();
372	<	} catch (NoSuchElementException success) {
373	<	}
393	<	}
394	<
395	<	/**
396	<	* remove(x) removes x and returns true if present
397	<	*/
398	<	public void testRemoveElement() {
399	<	LinkedTransferQueue q = populatedQueue(SIZE);
400	<	for (int i = 1; i < SIZE; i += 2) {
401	<	assertTrue(q.remove(i));
402	<	}
403	<	for (int i = 0; i < SIZE; i += 2) {
404	<	assertTrue(q.remove(i));
405	<	assertFalse(q.remove(i + 1));
406	<	}
407	<	assertTrue(q.isEmpty());
372	>	} catch (NoSuchElementException success) {}
373	>	checkEmpty(q);
374		}
375
376		/**
#	Line 417 | Line 383 | public class LinkedTransferQueueTest ext
383		assertTrue(q.remove(one));
384		assertTrue(q.remove(two));
385		assertTrue(q.add(three));
386	<	assertTrue(q.take() != null);
386	>	assertSame(q.take(), three);
387		}
388
389		/**
#	Line 435 | Line 401 | public class LinkedTransferQueueTest ext
401		/**
402		* clear removes all elements
403		*/
404	<	public void testClear() {
404	>	public void testClear() throws InterruptedException {
405		LinkedTransferQueue q = populatedQueue(SIZE);
406		q.clear();
407	<	assertTrue(q.isEmpty());
442	<	assertEquals(0, q.size());
407	>	checkEmpty(q);
408		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
409		q.add(one);
410		assertFalse(q.isEmpty());
411	+	assertEquals(1, q.size());
412		assertTrue(q.contains(one));
413		q.clear();
414	<	assertTrue(q.isEmpty());
414	>	checkEmpty(q);
415		}
416
417		/**
#	Line 499 | Line 465 | public class LinkedTransferQueueTest ext
465		}
466
467		/**
468	<	* toArray contains all elements
468	>	* toArray() contains all elements in FIFO order
469		*/
470	<	public void testToArray() throws InterruptedException {
470	>	public void testToArray() {
471		LinkedTransferQueue q = populatedQueue(SIZE);
472		Object[] o = q.toArray();
473		for (int i = 0; i < o.length; i++) {
474	<	assertEquals(o[i], q.take());
474	>	assertSame(o[i], q.poll());
475		}
476		}
477
478		/**
479	<	* toArray(a) contains all elements
479	>	* toArray(a) contains all elements in FIFO order
480		*/
481	<	public void testToArray2() throws InterruptedException {
481	>	public void testToArray2() {
482		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
483		Integer[] ints = new Integer[SIZE];
484	<	ints = q.toArray(ints);
484	>	Integer[] array = q.toArray(ints);
485	>	assertSame(ints, array);
486		for (int i = 0; i < ints.length; i++) {
487	<	assertEquals(ints[i], q.take());
487	>	assertSame(ints[i], q.poll());
488		}
489		}
490
491		/**
492	<	* toArray(null) throws NullPointerException
526	<	*/
527	<	public void testToArray_BadArg() {
528	<	try {
529	<	LinkedTransferQueue q = populatedQueue(SIZE);
530	<	Object o[] = q.toArray(null);
531	<	shouldThrow();
532	<	} catch (NullPointerException success) {
533	<	}
534	<	}
535	<
536	<	/**
537	<	* toArray with incompatible array type throws CCE
492	>	* toArray(incompatible array type) throws ArrayStoreException
493		*/
494		public void testToArray1_BadArg() {
495	+	LinkedTransferQueue q = populatedQueue(SIZE);
496		try {
497	<	LinkedTransferQueue q = populatedQueue(SIZE);
542	<	Object o[] = q.toArray(new String[10]);
497	>	q.toArray(new String[10]);
498		shouldThrow();
499	<	} catch (ArrayStoreException success) {
545	<	}
499	>	} catch (ArrayStoreException success) {}
500		}
501
502		/**
#	Line 551 | Line 505 | public class LinkedTransferQueueTest ext
505		public void testIterator() throws InterruptedException {
506		LinkedTransferQueue q = populatedQueue(SIZE);
507		Iterator it = q.iterator();
508	<	while (it.hasNext()) {
508	>	int i;
509	>	for (i = 0; it.hasNext(); i++)
510	>	assertTrue(q.contains(it.next()));
511	>	assertEquals(i, SIZE);
512	>	assertIteratorExhausted(it);
513	>
514	>	it = q.iterator();
515	>	for (i = 0; it.hasNext(); i++)
516		assertEquals(it.next(), q.take());
517	<	}
517	>	assertEquals(i, SIZE);
518	>	assertIteratorExhausted(it);
519		}
520
521		/**
522	<	* iterator.remove removes current element
522	>	* iterator of empty collection has no elements
523	>	*/
524	>	public void testEmptyIterator() {
525	>	assertIteratorExhausted(new LinkedTransferQueue().iterator());
526	>	}
527	>
528	>	/**
529	>	* iterator.remove() removes current element
530		*/
531		public void testIteratorRemove() {
532		final LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 570 | Line 539 | public class LinkedTransferQueueTest ext
539		it.remove();
540
541		it = q.iterator();
542	<	assertEquals(it.next(), one);
543	<	assertEquals(it.next(), three);
542	>	assertSame(it.next(), one);
543	>	assertSame(it.next(), three);
544		assertFalse(it.hasNext());
545		}
546
#	Line 615 | Line 584 | public class LinkedTransferQueueTest ext
584		LinkedTransferQueue q = populatedQueue(SIZE);
585		String s = q.toString();
586		for (int i = 0; i < SIZE; ++i) {
587	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
587	>	assertTrue(s.contains(String.valueOf(i)));
588		}
589		}
590
#	Line 624 | Line 593 | public class LinkedTransferQueueTest ext
593		*/
594		public void testOfferInExecutor() {
595		final LinkedTransferQueue q = new LinkedTransferQueue();
596	<	q.add(one);
597	<	q.add(two);
598	<	ExecutorService executor = Executors.newFixedThreadPool(2);
599	<
600	<	executor.execute(new CheckedRunnable() {
601	<	void realRun() {
602	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS,
603	<	MILLISECONDS));
604	<	}});
636	<
637	<	executor.execute(new CheckedRunnable() {
638	<	void realRun() throws InterruptedException {
639	<	Thread.sleep(SMALL_DELAY_MS);
640	<	threadAssertEquals(one, q.take());
641	<	}});
596	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
597	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
598	>	try (PoolCleaner cleaner = cleaner(executor)) {
599	>
600	>	executor.execute(new CheckedRunnable() {
601	>	public void realRun() throws InterruptedException {
602	>	threadsStarted.await();
603	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
604	>	}});
605
606	<	joinPool(executor);
606	>	executor.execute(new CheckedRunnable() {
607	>	public void realRun() throws InterruptedException {
608	>	threadsStarted.await();
609	>	assertSame(one, q.take());
610	>	checkEmpty(q);
611	>	}});
612	>	}
613		}
614
615		/**
616	<	* poll retrieves elements across Executor threads
616	>	* timed poll retrieves elements across Executor threads
617		*/
618		public void testPollInExecutor() {
619		final LinkedTransferQueue q = new LinkedTransferQueue();
620	<	ExecutorService executor = Executors.newFixedThreadPool(2);
621	<
622	<	executor.execute(new CheckedRunnable() {
623	<	void realRun() throws InterruptedException {
624	<	threadAssertNull(q.poll());
625	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS,
626	<	MILLISECONDS));
627	<	threadAssertTrue(q.isEmpty());
628	<	}});
629	<
630	<	executor.execute(new CheckedRunnable() {
662	<	void realRun() throws InterruptedException {
663	<	Thread.sleep(SMALL_DELAY_MS);
664	<	q.put(one);
665	<	}});
620	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
621	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
622	>	try (PoolCleaner cleaner = cleaner(executor)) {
623	>
624	>	executor.execute(new CheckedRunnable() {
625	>	public void realRun() throws InterruptedException {
626	>	assertNull(q.poll());
627	>	threadsStarted.await();
628	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
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	<
676	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
677	<	ObjectOutputStream out
678	<	= new ObjectOutputStream(new BufferedOutputStream(bout));
679	<	out.writeObject(q);
680	<	out.close();
681	<
682	<	ByteArrayInputStream bin
683	<	= new ByteArrayInputStream(bout.toByteArray());
684	<	ObjectInputStream in
685	<	= new ObjectInputStream(new BufferedInputStream(bin));
686	<	LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
687	<
688	<	assertEquals(q.size(), r.size());
689	<	while (!q.isEmpty()) {
690	<	assertEquals(q.remove(), r.remove());
691	<	}
692	<	}
693	<
694	<	/**
695	<	* drainTo(null) throws NullPointerException
696	<	*/
697	<	public void testDrainToNull() {
698	<	LinkedTransferQueue q = populatedQueue(SIZE);
699	<	try {
700	<	q.drainTo(null);
701	<	shouldThrow();
702	<	} catch (NullPointerException success) {
703	<	}
704	<	}
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);
713	<	shouldThrow();
714	<	} 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 722 | 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 734 | 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	<	}
759	<	t.join();
696	>	for (int i = 0; i < SIZE; ++i)
697	>	assertEquals(i, l.get(i));
698	>	awaitTermination(t, MEDIUM_DELAY_MS);
699		assertTrue(q.size() + l.size() >= SIZE);
700		}
701
702		/**
703	<	* drainTo(null, n) throws NullPointerException
765	<	*/
766	<	public void testDrainToNullN() {
767	<	LinkedTransferQueue q = populatedQueue(SIZE);
768	<	try {
769	<	q.drainTo(null, 0);
770	<	shouldThrow();
771	<	} catch (NullPointerException success) {
772	<	}
773	<	}
774	<
775	<	/**
776	<	* drainTo(this, n) throws IllegalArgumentException
777	<	*/
778	<	public void testDrainToSelfN() {
779	<	LinkedTransferQueue q = populatedQueue(SIZE);
780	<	try {
781	<	q.drainTo(q, 0);
782	<	shouldThrow();
783	<	} catch (IllegalArgumentException success) {
784	<	}
785	<	}
786	<
787	<	/**
788	<	* 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 796 | 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	<	}
804	<	while (q.poll() != null)
805	<	;
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	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
736	>	assertEquals(0, q.getWaitingConsumerCount());
737	>	assertFalse(q.hasWaitingConsumer());
738		}});
739
740	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) != null);
741	<	assertTrue(q.getWaitingConsumerCount()
742	<	< waiting.getWaitingConsumers());
743	<	t.join();
740	>	threadStarted.await();
741	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
742	>	assertEquals(1, q.getWaitingConsumerCount());
743	>	assertTrue(q.hasWaitingConsumer());
744	>
745	>	assertTrue(q.offer(one));
746	>	assertEquals(0, q.getWaitingConsumerCount());
747	>	assertFalse(q.hasWaitingConsumer());
748	>
749	>	awaitTermination(t, MEDIUM_DELAY_MS);
750		}
751
752		/**
#	Line 835 | Line 757 | public class LinkedTransferQueueTest ext
757		LinkedTransferQueue q = new LinkedTransferQueue();
758		q.transfer(null);
759		shouldThrow();
760	<	} catch (NullPointerException ex) {
839	<	}
760	>	} catch (NullPointerException success) {}
761		}
762
763		/**
#	Line 846 | Line 767 | public class LinkedTransferQueueTest ext
767		public void testTransfer2() throws InterruptedException {
768		final LinkedTransferQueue<Integer> q
769		= new LinkedTransferQueue<Integer>();
770	+	final CountDownLatch threadStarted = new CountDownLatch(1);
771
772		Thread t = newStartedThread(new CheckedRunnable() {
773	<	void realRun() throws InterruptedException {
774	<	q.transfer(SIZE);
775	<	threadAssertTrue(q.isEmpty());
773	>	public void realRun() throws InterruptedException {
774	>	threadStarted.countDown();
775	>	q.transfer(five);
776	>	checkEmpty(q);
777		}});
778
779	<	Thread.sleep(SHORT_DELAY_MS);
779	>	threadStarted.await();
780	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
781		assertEquals(1, q.size());
782	<	assertEquals(SIZE, (int) q.poll());
783	<	assertTrue(q.isEmpty());
784	<	t.join();
782	>	assertSame(five, q.poll());
783	>	checkEmpty(q);
784	>	awaitTermination(t, MEDIUM_DELAY_MS);
785		}
786
787		/**
#	Line 868 | Line 792 | public class LinkedTransferQueueTest ext
792		= new LinkedTransferQueue<Integer>();
793
794		Thread first = newStartedThread(new CheckedRunnable() {
795	<	void realRun() throws InterruptedException {
796	<	Integer i = SIZE + 1;
797	<	q.transfer(i);
798	<	threadAssertTrue(!q.contains(i));
875	<	threadAssertEquals(1, q.size());
795	>	public void realRun() throws InterruptedException {
796	>	q.transfer(four);
797	>	assertTrue(!q.contains(four));
798	>	assertEquals(1, q.size());
799		}});
800
801		Thread interruptedThread = newStartedThread(
802		new CheckedInterruptedRunnable() {
803	<	void realRun() throws InterruptedException {
804	<	while (q.size() == 0)
803	>	public void realRun() throws InterruptedException {
804	>	while (q.isEmpty())
805		Thread.yield();
806	<	q.transfer(SIZE);
806	>	q.transfer(five);
807		}});
808
809		while (q.size() < 2)
810		Thread.yield();
811		assertEquals(2, q.size());
812	<	assertEquals(SIZE + 1, (int) q.poll());
812	>	assertSame(four, q.poll());
813		first.join();
814		assertEquals(1, q.size());
815		interruptedThread.interrupt();
816		interruptedThread.join();
817	<	assertEquals(0, q.size());
895	<	assertTrue(q.isEmpty());
817	>	checkEmpty(q);
818		}
819
820		/**
#	Line 903 | Line 825 | public class LinkedTransferQueueTest ext
825		final LinkedTransferQueue q = new LinkedTransferQueue();
826
827		Thread t = newStartedThread(new CheckedRunnable() {
828	<	void realRun() throws InterruptedException {
828	>	public void realRun() throws InterruptedException {
829		q.transfer(four);
830	<	threadAssertFalse(q.contains(four));
831	<	threadAssertEquals(three, q.poll());
830	>	assertFalse(q.contains(four));
831	>	assertSame(three, q.poll());
832		}});
833
834	<	Thread.sleep(SHORT_DELAY_MS);
834	>	while (q.isEmpty())
835	>	Thread.yield();
836	>	assertFalse(q.isEmpty());
837	>	assertEquals(1, q.size());
838		assertTrue(q.offer(three));
839	<	assertEquals(four, q.poll());
840	<	t.join();
839	>	assertSame(four, q.poll());
840	>	awaitTermination(t, MEDIUM_DELAY_MS);
841		}
842
843		/**
#	Line 924 | Line 849 | public class LinkedTransferQueueTest ext
849		= new LinkedTransferQueue<Integer>();
850
851		Thread t = newStartedThread(new CheckedRunnable() {
852	<	void realRun() throws InterruptedException {
853	<	q.transfer(SIZE);
854	<	threadAssertTrue(q.isEmpty());
852	>	public void realRun() throws InterruptedException {
853	>	q.transfer(four);
854	>	checkEmpty(q);
855		}});
856
857	<	Thread.sleep(SHORT_DELAY_MS);
858	<	assertEquals(SIZE, (int) q.take());
859	<	assertTrue(q.isEmpty());
860	<	t.join();
857	>	while (q.isEmpty())
858	>	Thread.yield();
859	>	assertFalse(q.isEmpty());
860	>	assertEquals(1, q.size());
861	>	assertSame(four, q.take());
862	>	checkEmpty(q);
863	>	awaitTermination(t, MEDIUM_DELAY_MS);
864		}
865
866		/**
867		* tryTransfer(null) throws NullPointerException
868		*/
869		public void testTryTransfer1() {
870	+	final LinkedTransferQueue q = new LinkedTransferQueue();
871		try {
943	–	final LinkedTransferQueue q = new LinkedTransferQueue();
872		q.tryTransfer(null);
873		shouldThrow();
874	<	} catch (NullPointerException ex) {
947	<	}
874	>	} catch (NullPointerException success) {}
875		}
876
877		/**
878		* tryTransfer returns false and does not enqueue if there are no
879		* consumers waiting to poll or take.
880		*/
881	<	public void testTryTransfer2() {
881	>	public void testTryTransfer2() throws InterruptedException {
882		final LinkedTransferQueue q = new LinkedTransferQueue();
883		assertFalse(q.tryTransfer(new Object()));
884		assertFalse(q.hasWaitingConsumer());
885	<	assertTrue(q.isEmpty());
959	<	assertEquals(0, q.size());
885	>	checkEmpty(q);
886		}
887
888		/**
#	Line 968 | Line 894 | public class LinkedTransferQueueTest ext
894		final LinkedTransferQueue q = new LinkedTransferQueue();
895
896		Thread t = newStartedThread(new CheckedRunnable() {
897	<	void realRun() {
897	>	public void realRun() {
898		while (! q.hasWaitingConsumer())
899		Thread.yield();
900	<	threadAssertTrue(q.hasWaitingConsumer());
901	<	threadAssertTrue(q.isEmpty());
902	<	threadAssertTrue(q.size() == 0);
977	<	threadAssertTrue(q.tryTransfer(hotPotato));
900	>	assertTrue(q.hasWaitingConsumer());
901	>	checkEmpty(q);
902	>	assertTrue(q.tryTransfer(hotPotato));
903		}});
904
905	<	assertTrue(q.poll(MEDIUM_DELAY_MS, MILLISECONDS) == hotPotato);
906	<	assertTrue(q.isEmpty());
907	<	t.join();
905	>	assertSame(hotPotato, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
906	>	checkEmpty(q);
907	>	awaitTermination(t, MEDIUM_DELAY_MS);
908		}
909
910		/**
#	Line 991 | Line 916 | public class LinkedTransferQueueTest ext
916		final LinkedTransferQueue q = new LinkedTransferQueue();
917
918		Thread t = newStartedThread(new CheckedRunnable() {
919	<	void realRun() {
919	>	public void realRun() {
920		while (! q.hasWaitingConsumer())
921		Thread.yield();
922	<	threadAssertTrue(q.hasWaitingConsumer());
923	<	threadAssertTrue(q.isEmpty());
924	<	threadAssertTrue(q.size() == 0);
1000	<	threadAssertTrue(q.tryTransfer(hotPotato));
922	>	assertTrue(q.hasWaitingConsumer());
923	>	checkEmpty(q);
924	>	assertTrue(q.tryTransfer(hotPotato));
925		}});
926
927	<	assertTrue(q.take() == hotPotato);
928	<	assertTrue(q.isEmpty());
929	<	t.join();
927	>	assertSame(q.take(), hotPotato);
928	>	checkEmpty(q);
929	>	awaitTermination(t, MEDIUM_DELAY_MS);
930		}
931
932		/**
933	<	* tryTransfer waits the amount given if interrupted, and
1010	<	* throws interrupted exception
933	>	* tryTransfer blocks interruptibly if no takers
934		*/
935		public void testTryTransfer5() throws InterruptedException {
936		final LinkedTransferQueue q = new LinkedTransferQueue();
937	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
938	+	assertTrue(q.isEmpty());
939
940	<	Thread toInterrupt = newStartedThread(new CheckedInterruptedRunnable() {
941	<	void realRun() throws InterruptedException {
942	<	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
940	>	Thread t = newStartedThread(new CheckedRunnable() {
941	>	public void realRun() throws InterruptedException {
942	>	Thread.currentThread().interrupt();
943	>	try {
944	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
945	>	shouldThrow();
946	>	} catch (InterruptedException success) {}
947	>	assertFalse(Thread.interrupted());
948	>
949	>	pleaseInterrupt.countDown();
950	>	try {
951	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
952	>	shouldThrow();
953	>	} catch (InterruptedException success) {}
954	>	assertFalse(Thread.interrupted());
955		}});
956
957	<	Thread.sleep(SMALL_DELAY_MS);
958	<	toInterrupt.interrupt();
959	<	toInterrupt.join();
957	>	await(pleaseInterrupt);
958	>	assertThreadStaysAlive(t);
959	>	t.interrupt();
960	>	awaitTermination(t);
961	>	checkEmpty(q);
962		}
963
964		/**
965	<	* tryTransfer gives up after the timeout and return false
965	>	* tryTransfer gives up after the timeout and returns false
966		*/
967		public void testTryTransfer6() throws InterruptedException {
968		final LinkedTransferQueue q = new LinkedTransferQueue();
969
970		Thread t = newStartedThread(new CheckedRunnable() {
971	<	void realRun() throws InterruptedException {
972	<	threadAssertFalse
973	<	(q.tryTransfer(new Object(),
974	<	SHORT_DELAY_MS, MILLISECONDS));
971	>	public void realRun() throws InterruptedException {
972	>	long startTime = System.nanoTime();
973	>	assertFalse(q.tryTransfer(new Object(),
974	>	timeoutMillis(), MILLISECONDS));
975	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
976	>	checkEmpty(q);
977		}});
978
979	<	Thread.sleep(SMALL_DELAY_MS);
980	<	assertTrue(q.isEmpty());
1040	<	t.join();
979	>	awaitTermination(t);
980	>	checkEmpty(q);
981		}
982
983		/**
#	Line 1049 | Line 989 | public class LinkedTransferQueueTest ext
989		assertTrue(q.offer(four));
990
991		Thread t = newStartedThread(new CheckedRunnable() {
992	<	void realRun() throws InterruptedException {
993	<	threadAssertTrue(q.tryTransfer(five,
994	<	MEDIUM_DELAY_MS, MILLISECONDS));
1055	<	threadAssertTrue(q.isEmpty());
992	>	public void realRun() throws InterruptedException {
993	>	assertTrue(q.tryTransfer(five, MEDIUM_DELAY_MS, MILLISECONDS));
994	>	checkEmpty(q);
995		}});
996
997	<	Thread.sleep(SHORT_DELAY_MS);
997	>	while (q.size() != 2)
998	>	Thread.yield();
999		assertEquals(2, q.size());
1000	<	assertEquals(four, q.poll());
1001	<	assertEquals(five, q.poll());
1002	<	assertTrue(q.isEmpty());
1003	<	t.join();
1000	>	assertSame(four, q.poll());
1001	>	assertSame(five, q.poll());
1002	>	checkEmpty(q);
1003	>	awaitTermination(t, MEDIUM_DELAY_MS);
1004		}
1005
1006		/**
1007	<	* tryTransfer attempts to enqueue into the q and fails returning
1008	<	* false not enqueueing and the successive poll is null
1007	>	* tryTransfer attempts to enqueue into the queue and fails
1008	>	* returning false not enqueueing and the successive poll is null
1009		*/
1010		public void testTryTransfer8() throws InterruptedException {
1011		final LinkedTransferQueue q = new LinkedTransferQueue();
1012		assertTrue(q.offer(four));
1013		assertEquals(1, q.size());
1014	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
1014	>	long startTime = System.nanoTime();
1015	>	assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
1016	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
1017		assertEquals(1, q.size());
1018	<	assertEquals(four, q.poll());
1077	<	threadAssertTrue(q.isEmpty());
1018	>	assertSame(four, q.poll());
1019		assertNull(q.poll());
1020	+	checkEmpty(q);
1021		}
1022
1023		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1024		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1025	<	assertTrue(q.isEmpty());
1025	>	checkEmpty(q);
1026		for (int i = 0; i < n; i++) {
1027		assertEquals(i, q.size());
1028		assertTrue(q.offer(i));
#	Line 1090 | Line 1032 | public class LinkedTransferQueueTest ext
1032		return q;
1033		}
1034
1035	<	private static class ConsumerObserver {
1036	<
1037	<	private int waitingConsumers;
1038	<
1039	<	private ConsumerObserver() {
1040	<	}
1041	<
1042	<	private void setWaitingConsumer(int i) {
1043	<	this.waitingConsumers = i;
1044	<	}
1045	<
1046	<	private int getWaitingConsumers() {
1105	<	return waitingConsumers;
1035	>	/**
1036	>	* remove(null), contains(null) always return false
1037	>	*/
1038	>	public void testNeverContainsNull() {
1039	>	Collection<?>[] qs = {
1040	>	new LinkedTransferQueue<Object>(),
1041	>	populatedQueue(2),
1042	>	};
1043	>
1044	>	for (Collection<?> q : qs) {
1045	>	assertFalse(q.contains(null));
1046	>	assertFalse(q.remove(null));
1047		}
1048		}
1049		}

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