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

Comparing jsr166/src/test/tck/LinkedTransferQueueTest.java (file contents):
Revision 1.5 by jsr166, Sun Aug 2 08:17:31 2009 UTC vs.
Revision 1.43 by jsr166, Sun Nov 28 08:43:53 2010 UTC

#	Line 13 | Line 13 | import java.io.ObjectInputStream;
13		import java.io.ObjectOutputStream;
14		import java.util.ArrayList;
15		import java.util.Arrays;
16	–	import java.util.ConcurrentModificationException;
16		import java.util.Iterator;
17	+	import java.util.List;
18		import java.util.NoSuchElementException;
19		import java.util.concurrent.*;
20	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
21	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
22		import junit.framework.Test;
23		import junit.framework.TestSuite;
24
25	+	@SuppressWarnings({"unchecked", "rawtypes"})
26		public class LinkedTransferQueueTest extends JSR166TestCase {
27
28	+	public static class Generic extends BlockingQueueTest {
29	+	protected BlockingQueue emptyCollection() {
30	+	return new LinkedTransferQueue();
31	+	}
32	+	}
33	+
34		public static void main(String[] args) {
35		junit.textui.TestRunner.run(suite());
36		}
37
38		public static Test suite() {
39	<	return new TestSuite(LinkedTransferQueueTest.class);
39	>	return newTestSuite(LinkedTransferQueueTest.class,
40	>	new Generic().testSuite());
41		}
42
43		/**
44	<	* Constructor builds new queue with size being zero and empty being true
44	>	* Constructor builds new queue with size being zero and empty
45	>	* being true
46		*/
47		public void testConstructor1() {
48		assertEquals(0, new LinkedTransferQueue().size());
#	Line 39 | Line 50 | public class LinkedTransferQueueTest ext
50		}
51
52		/**
53	<	* Initializing constructor with null collection throws NullPointerException
53	>	* Initializing constructor with null collection throws
54	>	* NullPointerException
55		*/
56		public void testConstructor2() {
57		try {
58		new LinkedTransferQueue(null);
59		shouldThrow();
60	<	} catch (NullPointerException success) {
49	<	}
60	>	} catch (NullPointerException success) {}
61		}
62
63		/**
64	<	* Initializing from Collection of null elements throws NullPointerException
64	>	* Initializing from Collection of null elements throws
65	>	* NullPointerException
66		*/
67		public void testConstructor3() {
68		try {
69		Integer[] ints = new Integer[SIZE];
70	<	LinkedTransferQueue q = new LinkedTransferQueue(Arrays.asList(ints));
70	>	new LinkedTransferQueue(Arrays.asList(ints));
71		shouldThrow();
72	<	} catch (NullPointerException success) {
61	<	}
72	>	} catch (NullPointerException success) {}
73		}
74
75		/**
#	Line 71 | Line 82 | public class LinkedTransferQueueTest ext
82		for (int i = 0; i < SIZE - 1; ++i) {
83		ints[i] = i;
84		}
85	<	LinkedTransferQueue q = new LinkedTransferQueue(Arrays.asList(ints));
85	>	new LinkedTransferQueue(Arrays.asList(ints));
86		shouldThrow();
87	<	} catch (NullPointerException success) {
77	<	}
87	>	} catch (NullPointerException success) {}
88		}
89
90		/**
91		* Queue contains all elements of the collection it is initialized by
92		*/
93		public void testConstructor5() {
94	<	try {
95	<	Integer[] ints = new Integer[SIZE];
96	<	for (int i = 0; i < SIZE; ++i) {
97	<	ints[i] = i;
98	<	}
99	<	LinkedTransferQueue q = new LinkedTransferQueue(Arrays.asList(ints));
100	<	for (int i = 0; i < SIZE; ++i) {
101	<	assertEquals(ints[i], q.poll());
102	<	}
103	<	} finally {
94	>	Integer[] ints = new Integer[SIZE];
95	>	for (int i = 0; i < SIZE; ++i) {
96	>	ints[i] = i;
97	>	}
98	>	List intList = Arrays.asList(ints);
99	>	LinkedTransferQueue q
100	>	= new LinkedTransferQueue(intList);
101	>	assertEquals(q.size(), intList.size());
102	>	assertEquals(q.toString(), intList.toString());
103	>	assertTrue(Arrays.equals(q.toArray(),
104	>	intList.toArray()));
105	>	assertTrue(Arrays.equals(q.toArray(new Object[0]),
106	>	intList.toArray(new Object[0])));
107	>	assertTrue(Arrays.equals(q.toArray(new Object[SIZE]),
108	>	intList.toArray(new Object[SIZE])));
109	>	for (int i = 0; i < SIZE; ++i) {
110	>	assertEquals(ints[i], q.poll());
111		}
112		}
113
114		/**
115	<	* Remaining capacity never decrease nor increase on add or remove
115	>	* remainingCapacity() always returns Integer.MAX_VALUE
116		*/
117		public void testRemainingCapacity() {
118		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
#	Line 119 | Line 136 | public class LinkedTransferQueueTest ext
136		LinkedTransferQueue q = new LinkedTransferQueue();
137		q.offer(null);
138		shouldThrow();
139	<	} catch (NullPointerException success) {
123	<	}
139	>	} catch (NullPointerException success) {}
140		}
141
142		/**
#	Line 131 | Line 147 | public class LinkedTransferQueueTest ext
147		LinkedTransferQueue q = new LinkedTransferQueue();
148		q.add(null);
149		shouldThrow();
150	<	} catch (NullPointerException success) {
135	<	}
150	>	} catch (NullPointerException success) {}
151		}
152
153		/**
#	Line 143 | Line 158 | public class LinkedTransferQueueTest ext
158		LinkedTransferQueue q = new LinkedTransferQueue();
159		q.addAll(null);
160		shouldThrow();
161	<	} catch (NullPointerException success) {
147	<	}
161	>	} catch (NullPointerException success) {}
162		}
163
164		/**
#	Line 155 | Line 169 | public class LinkedTransferQueueTest ext
169		LinkedTransferQueue q = populatedQueue(SIZE);
170		q.addAll(q);
171		shouldThrow();
172	<	} catch (IllegalArgumentException success) {
159	<	}
172	>	} catch (IllegalArgumentException success) {}
173		}
174
175		/**
#	Line 168 | Line 181 | public class LinkedTransferQueueTest ext
181		Integer[] ints = new Integer[SIZE];
182		q.addAll(Arrays.asList(ints));
183		shouldThrow();
184	<	} catch (NullPointerException success) {
172	<	}
184	>	} catch (NullPointerException success) {}
185		}
186
187		/**
188	<	* addAll of a collection with any null elements throws NullPointerException after
189	<	* possibly adding some elements
188	>	* addAll of a collection with any null elements throws
189	>	* NullPointerException after possibly adding some elements
190		*/
191		public void testAddAll3() {
192		try {
#	Line 185 | Line 197 | public class LinkedTransferQueueTest ext
197		}
198		q.addAll(Arrays.asList(ints));
199		shouldThrow();
200	<	} catch (NullPointerException success) {
189	<	}
200	>	} catch (NullPointerException success) {}
201		}
202
203		/**
#	Line 223 | Line 234 | public class LinkedTransferQueueTest ext
234		public void testPut() {
235		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
236		for (int i = 0; i < SIZE; ++i) {
237	+	assertEquals(q.size(), i);
238		q.put(i);
239		assertTrue(q.contains(i));
240		}
229	–	assertEquals(q.size(), SIZE);
241		}
242
243		/**
#	Line 240 | Line 251 | public class LinkedTransferQueueTest ext
251		}
252
253		/**
254	<	* take blocks interruptibly when empty
244	<	*/
245	<	public void testTakeFromEmpty() throws InterruptedException {
246	<	final LinkedTransferQueue q = new LinkedTransferQueue();
247	<	Thread t = new Thread(new Runnable() {
248	<	public void run() {
249	<	try {
250	<	q.take();
251	<	threadShouldThrow();
252	<	} catch (InterruptedException success) {
253	<	} catch (Throwable ex) {
254	<	threadUnexpectedException(ex);
255	<	}
256	<	}});
257	<	t.start();
258	<	Thread.sleep(SHORT_DELAY_MS);
259	<	t.interrupt();
260	<	t.join();
261	<	}
262	<
263	<	/**
264	<	* Take removes existing elements until empty, then blocks interruptibly
254	>	* take removes existing elements until empty, then blocks interruptibly
255		*/
256		public void testBlockingTake() throws InterruptedException {
257	<	Thread t = new Thread(new Runnable() {
258	<	public void run() {
257	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
258	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
259	>	Thread t = newStartedThread(new CheckedRunnable() {
260	>	public void realRun() throws InterruptedException {
261	>	for (int i = 0; i < SIZE; ++i) {
262	>	assertEquals(i, (int) q.take());
263	>	}
264	>	aboutToWait.countDown();
265		try {
270	–	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
271	–	for (int i = 0; i < SIZE; ++i) {
272	–	threadAssertEquals(i, (int) q.take());
273	–	}
266		q.take();
267	<	threadShouldThrow();
268	<	} catch (InterruptedException success) {
277	<	} catch (Throwable ex) {
278	<	threadUnexpectedException(ex);
279	<	}
267	>	shouldThrow();
268	>	} catch (InterruptedException success) {}
269		}});
270	<	t.start();
271	<	Thread.sleep(SHORT_DELAY_MS);
270	>
271	>	aboutToWait.await();
272	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
273		t.interrupt();
274	<	t.join();
274	>	awaitTermination(t, MEDIUM_DELAY_MS);
275	>	checkEmpty(q);
276		}
277
278		/**
279		* poll succeeds unless empty
280		*/
281	<	public void testPoll() {
281	>	public void testPoll() throws InterruptedException {
282		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
283		for (int i = 0; i < SIZE; ++i) {
284		assertEquals(i, (int) q.poll());
285		}
286		assertNull(q.poll());
287	+	checkEmpty(q);
288		}
289
290		/**
291	<	* timed pool with zero timeout succeeds when non-empty, else times out
291	>	* timed poll with zero timeout succeeds when non-empty, else times out
292		*/
293		public void testTimedPoll0() throws InterruptedException {
294		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
295		for (int i = 0; i < SIZE; ++i) {
296	<	assertEquals(i, (int) q.poll(0, TimeUnit.MILLISECONDS));
296	>	assertEquals(i, (int) q.poll(0, MILLISECONDS));
297		}
298	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
298	>	assertNull(q.poll(0, MILLISECONDS));
299	>	checkEmpty(q);
300		}
301
302		/**
303	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
303	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
304		*/
305		public void testTimedPoll() throws InterruptedException {
306		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
307		for (int i = 0; i < SIZE; ++i) {
308	<	assertEquals(i, (int) q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
309	<	}
310	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
308	>	long t0 = System.nanoTime();
309	>	assertEquals(i, (int) q.poll(SMALL_DELAY_MS, MILLISECONDS));
310	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
311	>	}
312	>	long t0 = System.nanoTime();
313	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
314	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
315	>	checkEmpty(q);
316		}
317
318		/**
#	Line 322 | Line 320 | public class LinkedTransferQueueTest ext
320		* returning timeout status
321		*/
322		public void testInterruptedTimedPoll() throws InterruptedException {
323	<	Thread t = new Thread(new Runnable() {
324	<	public void run() {
323	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
324	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
325	>	Thread t = newStartedThread(new CheckedRunnable() {
326	>	public void realRun() throws InterruptedException {
327	>	for (int i = 0; i < SIZE; ++i) {
328	>	long t0 = System.nanoTime();
329	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
330	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
331	>	}
332	>	long t0 = System.nanoTime();
333	>	aboutToWait.countDown();
334		try {
335	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
336	<	for (int i = 0; i < SIZE; ++i) {
330	<	threadAssertEquals(i, (int) q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
331	<	}
332	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
335	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
336	>	shouldThrow();
337		} catch (InterruptedException success) {
338	<	} catch (Throwable ex) {
335	<	threadUnexpectedException(ex);
338	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
339		}
340		}});
341	<	t.start();
342	<	Thread.sleep(SHORT_DELAY_MS);
341	>
342	>	aboutToWait.await();
343	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
344		t.interrupt();
345	<	t.join();
345	>	awaitTermination(t, MEDIUM_DELAY_MS);
346	>	checkEmpty(q);
347		}
348
349		/**
350	<	* timed poll before a delayed offer fails; after offer succeeds;
351	<	* on interruption throws
350	>	* timed poll after thread interrupted throws InterruptedException
351	>	* instead of returning timeout status
352		*/
353	<	public void testTimedPollWithOffer() throws InterruptedException {
354	<	final LinkedTransferQueue q = new LinkedTransferQueue();
355	<	Thread t = new Thread(new Runnable() {
356	<	public void run() {
357	<	try {
358	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
359	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
360	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
361	<	threadShouldThrow();
357	<	} catch (InterruptedException success) {
358	<	} catch (Throwable ex) {
359	<	threadUnexpectedException(ex);
353	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
354	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
355	>	Thread t = newStartedThread(new CheckedRunnable() {
356	>	public void realRun() throws InterruptedException {
357	>	Thread.currentThread().interrupt();
358	>	for (int i = 0; i < SIZE; ++i) {
359	>	long t0 = System.nanoTime();
360	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
361	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
362		}
363	+	try {
364	+	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
365	+	shouldThrow();
366	+	} catch (InterruptedException success) {}
367		}});
368	<	t.start();
369	<	Thread.sleep(SMALL_DELAY_MS);
370	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
365	<	t.interrupt();
366	<	t.join();
368	>
369	>	awaitTermination(t, MEDIUM_DELAY_MS);
370	>	checkEmpty(q);
371		}
372
373		/**
374		* peek returns next element, or null if empty
375		*/
376	<	public void testPeek() {
376	>	public void testPeek() throws InterruptedException {
377		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
378		for (int i = 0; i < SIZE; ++i) {
379		assertEquals(i, (int) q.peek());
#	Line 378 | Line 382 | public class LinkedTransferQueueTest ext
382		i != (int) q.peek());
383		}
384		assertNull(q.peek());
385	+	checkEmpty(q);
386		}
387
388		/**
389		* element returns next element, or throws NoSuchElementException if empty
390		*/
391	<	public void testElement() {
391	>	public void testElement() throws InterruptedException {
392		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
393		for (int i = 0; i < SIZE; ++i) {
394		assertEquals(i, (int) q.element());
#	Line 392 | Line 397 | public class LinkedTransferQueueTest ext
397		try {
398		q.element();
399		shouldThrow();
400	<	} catch (NoSuchElementException success) {
401	<	}
400	>	} catch (NoSuchElementException success) {}
401	>	checkEmpty(q);
402		}
403
404		/**
405		* remove removes next element, or throws NoSuchElementException if empty
406		*/
407	<	public void testRemove() {
407	>	public void testRemove() throws InterruptedException {
408		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
409		for (int i = 0; i < SIZE; ++i) {
410		assertEquals(i, (int) q.remove());
#	Line 407 | Line 412 | public class LinkedTransferQueueTest ext
412		try {
413		q.remove();
414		shouldThrow();
415	<	} catch (NoSuchElementException success) {
416	<	}
415	>	} catch (NoSuchElementException success) {}
416	>	checkEmpty(q);
417		}
418
419		/**
420		* remove(x) removes x and returns true if present
421		*/
422	<	public void testRemoveElement() {
422	>	public void testRemoveElement() throws InterruptedException {
423		LinkedTransferQueue q = populatedQueue(SIZE);
424	<	for (int i = 1; i < SIZE; i += 2) {
424	>	for (int i = 1; i < SIZE; i+=2) {
425	>	assertTrue(q.contains(i));
426		assertTrue(q.remove(i));
427	+	assertFalse(q.contains(i));
428	+	assertTrue(q.contains(i-1));
429		}
430	<	for (int i = 0; i < SIZE; i += 2) {
430	>	for (int i = 0; i < SIZE; i+=2) {
431	>	assertTrue(q.contains(i));
432		assertTrue(q.remove(i));
433	<	assertFalse(q.remove(i + 1));
433	>	assertFalse(q.contains(i));
434	>	assertFalse(q.remove(i+1));
435	>	assertFalse(q.contains(i+1));
436		}
437	<	assertTrue(q.isEmpty());
437	>	checkEmpty(q);
438		}
439
440		/**
#	Line 436 | Line 447 | public class LinkedTransferQueueTest ext
447		assertTrue(q.remove(one));
448		assertTrue(q.remove(two));
449		assertTrue(q.add(three));
450	<	assertTrue(q.take() != null);
450	>	assertSame(q.take(), three);
451		}
452
453		/**
#	Line 454 | Line 465 | public class LinkedTransferQueueTest ext
465		/**
466		* clear removes all elements
467		*/
468	<	public void testClear() {
468	>	public void testClear() throws InterruptedException {
469		LinkedTransferQueue q = populatedQueue(SIZE);
470		q.clear();
471	<	assertTrue(q.isEmpty());
461	<	assertEquals(0, q.size());
471	>	checkEmpty(q);
472		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
473		q.add(one);
474		assertFalse(q.isEmpty());
475	+	assertEquals(1, q.size());
476		assertTrue(q.contains(one));
477		q.clear();
478	<	assertTrue(q.isEmpty());
478	>	checkEmpty(q);
479		}
480
481		/**
#	Line 482 | Line 493 | public class LinkedTransferQueueTest ext
493		}
494
495		/**
496	<	* retainAll(c) retains only those elements of c and reports true if changed
496	>	* retainAll(c) retains only those elements of c and reports true
497	>	* if changed
498		*/
499		public void testRetainAll() {
500		LinkedTransferQueue q = populatedQueue(SIZE);
#	Line 501 | Line 513 | public class LinkedTransferQueueTest ext
513		}
514
515		/**
516	<	* removeAll(c) removes only those elements of c and reports true if changed
516	>	* removeAll(c) removes only those elements of c and reports true
517	>	* if changed
518		*/
519		public void testRemoveAll() {
520		for (int i = 1; i < SIZE; ++i) {
#	Line 516 | Line 529 | public class LinkedTransferQueueTest ext
529		}
530
531		/**
532	<	* toArray contains all elements
532	>	* toArray() contains all elements in FIFO order
533		*/
534	<	public void testToArray() throws InterruptedException {
534	>	public void testToArray() {
535		LinkedTransferQueue q = populatedQueue(SIZE);
536		Object[] o = q.toArray();
537		for (int i = 0; i < o.length; i++) {
538	<	assertEquals(o[i], q.take());
538	>	assertSame(o[i], q.poll());
539		}
540		}
541
542		/**
543	<	* toArray(a) contains all elements
543	>	* toArray(a) contains all elements in FIFO order
544		*/
545	<	public void testToArray2() throws InterruptedException {
545	>	public void testToArray2() {
546		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
547		Integer[] ints = new Integer[SIZE];
548	<	ints = q.toArray(ints);
548	>	Integer[] array = q.toArray(ints);
549	>	assertSame(ints, array);
550		for (int i = 0; i < ints.length; i++) {
551	<	assertEquals(ints[i], q.take());
551	>	assertSame(ints[i], q.poll());
552		}
553		}
554
555		/**
556		* toArray(null) throws NullPointerException
557		*/
558	<	public void testToArray_BadArg() {
558	>	public void testToArray_NullArg() {
559	>	LinkedTransferQueue q = populatedQueue(SIZE);
560		try {
561	<	LinkedTransferQueue q = populatedQueue(SIZE);
547	<	Object o[] = q.toArray(null);
561	>	q.toArray(null);
562		shouldThrow();
563	<	} catch (NullPointerException success) {
550	<	}
563	>	} catch (NullPointerException success) {}
564		}
565
566		/**
567	<	* toArray with incompatible array type throws CCE
567	>	* toArray(incompatible array type) throws ArrayStoreException
568		*/
569		public void testToArray1_BadArg() {
570	+	LinkedTransferQueue q = populatedQueue(SIZE);
571		try {
572	<	LinkedTransferQueue q = populatedQueue(SIZE);
559	<	Object o[] = q.toArray(new String[10]);
572	>	q.toArray(new String[10]);
573		shouldThrow();
574	<	} catch (ArrayStoreException success) {
562	<	}
574	>	} catch (ArrayStoreException success) {}
575		}
576
577		/**
#	Line 568 | Line 580 | public class LinkedTransferQueueTest ext
580		public void testIterator() throws InterruptedException {
581		LinkedTransferQueue q = populatedQueue(SIZE);
582		Iterator it = q.iterator();
583	+	int i = 0;
584		while (it.hasNext()) {
585	<	assertEquals(it.next(), q.take());
585	>	assertEquals(it.next(), i++);
586		}
587	+	assertEquals(i, SIZE);
588		}
589
590		/**
591	<	* iterator.remove removes current element
591	>	* iterator.remove() removes current element
592		*/
593		public void testIteratorRemove() {
594		final LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 587 | Line 601 | public class LinkedTransferQueueTest ext
601		it.remove();
602
603		it = q.iterator();
604	<	assertEquals(it.next(), one);
605	<	assertEquals(it.next(), three);
604	>	assertSame(it.next(), one);
605	>	assertSame(it.next(), three);
606		assertFalse(it.hasNext());
607		}
608
#	Line 596 | Line 610 | public class LinkedTransferQueueTest ext
610		* iterator ordering is FIFO
611		*/
612		public void testIteratorOrdering() {
613	<	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
613	>	final LinkedTransferQueue<Integer> q
614	>	= new LinkedTransferQueue<Integer>();
615		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
616		q.add(one);
617		q.add(two);
#	Line 640 | Line 655 | public class LinkedTransferQueueTest ext
655		*/
656		public void testOfferInExecutor() {
657		final LinkedTransferQueue q = new LinkedTransferQueue();
658	<	q.add(one);
644	<	q.add(two);
658	>	final CountDownLatch threadsStarted = new CountDownLatch(2);
659		ExecutorService executor = Executors.newFixedThreadPool(2);
660	<	executor.execute(new Runnable() {
661	<	public void run() {
662	<	try {
663	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
664	<	} catch (Throwable ex) {
665	<	threadUnexpectedException(ex);
652	<	}
660	>
661	>	executor.execute(new CheckedRunnable() {
662	>	public void realRun() throws InterruptedException {
663	>	threadsStarted.countDown();
664	>	threadsStarted.await();
665	>	assertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
666		}});
667
668	<	executor.execute(new Runnable() {
669	<	public void run() {
670	<	try {
671	<	Thread.sleep(SMALL_DELAY_MS);
672	<	threadAssertEquals(one, q.take());
673	<	} catch (Throwable ex) {
661	<	threadUnexpectedException(ex);
662	<	}
668	>	executor.execute(new CheckedRunnable() {
669	>	public void realRun() throws InterruptedException {
670	>	threadsStarted.countDown();
671	>	threadsStarted.await();
672	>	assertSame(one, q.take());
673	>	checkEmpty(q);
674		}});
675
676		joinPool(executor);
677		}
678
679		/**
680	<	* poll retrieves elements across Executor threads
680	>	* timed poll retrieves elements across Executor threads
681		*/
682		public void testPollInExecutor() {
683		final LinkedTransferQueue q = new LinkedTransferQueue();
684	+	final CountDownLatch threadsStarted = new CountDownLatch(2);
685		ExecutorService executor = Executors.newFixedThreadPool(2);
686	<	executor.execute(new Runnable() {
687	<	public void run() {
688	<	try {
689	<	threadAssertNull(q.poll());
690	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
691	<	threadAssertTrue(q.isEmpty());
692	<	} catch (Throwable  ex) {
693	<	threadUnexpectedException(ex);
682	<	}
686	>
687	>	executor.execute(new CheckedRunnable() {
688	>	public void realRun() throws InterruptedException {
689	>	assertNull(q.poll());
690	>	threadsStarted.countDown();
691	>	threadsStarted.await();
692	>	assertSame(one, q.poll(SMALL_DELAY_MS, MILLISECONDS));
693	>	checkEmpty(q);
694		}});
695
696	<	executor.execute(new Runnable() {
697	<	public void run() {
698	<	try {
699	<	Thread.sleep(SMALL_DELAY_MS);
700	<	q.put(one);
690	<	} catch (Throwable ex) {
691	<	threadUnexpectedException(ex);
692	<	}
696	>	executor.execute(new CheckedRunnable() {
697	>	public void realRun() throws InterruptedException {
698	>	threadsStarted.countDown();
699	>	threadsStarted.await();
700	>	q.put(one);
701		}});
702
703		joinPool(executor);
#	Line 702 | Line 710 | public class LinkedTransferQueueTest ext
710		LinkedTransferQueue q = populatedQueue(SIZE);
711
712		ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
713	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
713	>	ObjectOutputStream out
714	>	= new ObjectOutputStream(new BufferedOutputStream(bout));
715		out.writeObject(q);
716		out.close();
717
718	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
719	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
718	>	ByteArrayInputStream bin
719	>	= new ByteArrayInputStream(bout.toByteArray());
720	>	ObjectInputStream in
721	>	= new ObjectInputStream(new BufferedInputStream(bin));
722		LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
723
724		assertEquals(q.size(), r.size());
725	+	assertEquals(q.toString(), r.toString());
726	+	assertTrue(Arrays.equals(q.toArray(), r.toArray()));
727		while (!q.isEmpty()) {
728		assertEquals(q.remove(), r.remove());
729		}
#	Line 724 | Line 737 | public class LinkedTransferQueueTest ext
737		try {
738		q.drainTo(null);
739		shouldThrow();
740	<	} catch (NullPointerException success) {
728	<	}
740	>	} catch (NullPointerException success) {}
741		}
742
743		/**
#	Line 736 | Line 748 | public class LinkedTransferQueueTest ext
748		try {
749		q.drainTo(q);
750		shouldThrow();
751	<	} catch (IllegalArgumentException success) {
740	<	}
751	>	} catch (IllegalArgumentException success) {}
752		}
753
754		/**
#	Line 767 | Line 778 | public class LinkedTransferQueueTest ext
778		}
779
780		/**
781	<	* drainTo empties full queue, unblocking a waiting put.
781	>	* drainTo(c) empties full queue, unblocking a waiting put.
782		*/
783		public void testDrainToWithActivePut() throws InterruptedException {
784		final LinkedTransferQueue q = populatedQueue(SIZE);
785	<	Thread t = new Thread(new Runnable() {
786	<	public void run() {
787	<	try {
777	<	q.put(SIZE + 1);
778	<	} catch (Throwable ex) {
779	<	threadUnexpectedException(ex);
780	<	}
785	>	Thread t = newStartedThread(new CheckedRunnable() {
786	>	public void realRun() {
787	>	q.put(SIZE + 1);
788		}});
782	–	t.start();
789		ArrayList l = new ArrayList();
790		q.drainTo(l);
791		assertTrue(l.size() >= SIZE);
792		for (int i = 0; i < SIZE; ++i) {
793		assertEquals(l.get(i), i);
794		}
795	<	t.join();
795	>	awaitTermination(t, MEDIUM_DELAY_MS);
796		assertTrue(q.size() + l.size() >= SIZE);
797		}
798
#	Line 796 | Line 802 | public class LinkedTransferQueueTest ext
802		public void testDrainToNullN() {
803		LinkedTransferQueue q = populatedQueue(SIZE);
804		try {
805	<	q.drainTo(null, 0);
805	>	q.drainTo(null, SIZE);
806		shouldThrow();
807	<	} catch (NullPointerException success) {
802	<	}
807	>	} catch (NullPointerException success) {}
808		}
809
810		/**
#	Line 808 | Line 813 | public class LinkedTransferQueueTest ext
813		public void testDrainToSelfN() {
814		LinkedTransferQueue q = populatedQueue(SIZE);
815		try {
816	<	q.drainTo(q, 0);
816	>	q.drainTo(q, SIZE);
817		shouldThrow();
818	<	} catch (IllegalArgumentException success) {
814	<	}
818	>	} catch (IllegalArgumentException success) {}
819		}
820
821		/**
822	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
822	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
823		*/
824		public void testDrainToN() {
825		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 837 | Line 841 | public class LinkedTransferQueueTest ext
841		}
842
843		/**
844	<	* poll and take should decrement the waiting consumer count
844	>	* timed poll() or take() increments the waiting consumer count;
845	>	* offer(e) decrements the waiting consumer count
846		*/
847		public void testWaitingConsumer() throws InterruptedException {
848		final LinkedTransferQueue q = new LinkedTransferQueue();
849	<	final ConsumerObserver waiting = new ConsumerObserver();
850	<	new Thread(new Runnable() {
851	<	public void run() {
852	<	try {
853	<	threadAssertTrue(q.hasWaitingConsumer());
854	<	waiting.setWaitingConsumer(q.getWaitingConsumerCount());
855	<	threadAssertTrue(q.offer(new Object()));
856	<	} catch (Throwable ex) {
857	<	threadUnexpectedException(ex);
858	<	}
859	<	}}).start();
860	<	assertTrue(q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS) != null);
861	<	assertTrue(q.getWaitingConsumerCount() < waiting.getWaitingConsumers());
849	>	assertEquals(q.getWaitingConsumerCount(), 0);
850	>	assertFalse(q.hasWaitingConsumer());
851	>	final CountDownLatch threadStarted = new CountDownLatch(1);
852	>
853	>	Thread t = newStartedThread(new CheckedRunnable() {
854	>	public void realRun() throws InterruptedException {
855	>	threadStarted.countDown();
856	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
857	>	assertEquals(q.getWaitingConsumerCount(), 0);
858	>	assertFalse(q.hasWaitingConsumer());
859	>	}});
860	>
861	>	threadStarted.await();
862	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
863	>	assertEquals(q.getWaitingConsumerCount(), 1);
864	>	assertTrue(q.hasWaitingConsumer());
865	>
866	>	assertTrue(q.offer(one));
867	>	assertEquals(q.getWaitingConsumerCount(), 0);
868	>	assertFalse(q.hasWaitingConsumer());
869	>
870	>	awaitTermination(t, MEDIUM_DELAY_MS);
871		}
872
873		/**
#	Line 864 | Line 878 | public class LinkedTransferQueueTest ext
878		LinkedTransferQueue q = new LinkedTransferQueue();
879		q.transfer(null);
880		shouldThrow();
881	<	} catch (NullPointerException ex) {
868	<	}
881	>	} catch (NullPointerException success) {}
882		}
883
884		/**
885	<	* transfer attempts to insert into the queue then wait until that
886	<	* object is removed via take or poll.
885	>	* transfer waits until a poll occurs. The transfered element
886	>	* is returned by this associated poll.
887		*/
888		public void testTransfer2() throws InterruptedException {
889	<	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
890	<
891	<	new Thread(new Runnable() {
892	<	public void run() {
893	<	try {
894	<	q.transfer(SIZE);
895	<	threadAssertTrue(q.isEmpty());
896	<	} catch (Throwable ex) {
897	<	threadUnexpectedException(ex);
898	<	}
886	<	}}).start();
889	>	final LinkedTransferQueue<Integer> q
890	>	= new LinkedTransferQueue<Integer>();
891	>	final CountDownLatch threadStarted = new CountDownLatch(1);
892	>
893	>	Thread t = newStartedThread(new CheckedRunnable() {
894	>	public void realRun() throws InterruptedException {
895	>	threadStarted.countDown();
896	>	q.transfer(five);
897	>	checkEmpty(q);
898	>	}});
899
900	<	Thread.sleep(SHORT_DELAY_MS);
900	>	threadStarted.await();
901	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
902		assertEquals(1, q.size());
903	<	assertEquals(SIZE, (int) q.poll());
904	<	assertTrue(q.isEmpty());
903	>	assertSame(five, q.poll());
904	>	checkEmpty(q);
905	>	awaitTermination(t, MEDIUM_DELAY_MS);
906		}
907
908		/**
909	<	* transfer will attempt to transfer in fifo order and continue
896	<	* waiting if the element being transfered is not polled or taken
909	>	* transfer waits until a poll occurs, and then transfers in fifo order
910		*/
911		public void testTransfer3() throws InterruptedException {
912	<	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
912	>	final LinkedTransferQueue<Integer> q
913	>	= new LinkedTransferQueue<Integer>();
914
915	<	Thread first =
916	<	new Thread(new Runnable() {
917	<	public void run() {
918	<	try {
919	<	Integer i = SIZE + 1;
920	<	q.transfer(i);
907	<	threadAssertTrue(!q.contains(i));
908	<	threadAssertEquals(1, q.size());
909	<	} catch (Throwable ex) {
910	<	threadUnexpectedException(ex);
911	<	}
912	<	}});
913	<	first.start();
915	>	Thread first = newStartedThread(new CheckedRunnable() {
916	>	public void realRun() throws InterruptedException {
917	>	q.transfer(four);
918	>	assertTrue(!q.contains(four));
919	>	assertEquals(1, q.size());
920	>	}});
921
922	<	Thread interruptedThread =
923	<	new Thread(new Runnable() {
924	<	public void run() {
925	<	try {
926	<	while (q.size() == 0)
927	<	Thread.yield();
921	<	q.transfer(SIZE);
922	<	threadShouldThrow();
923	<	} catch (InterruptedException success) {
924	<	} catch (Throwable ex) {
925	<	threadUnexpectedException(ex);
926	<	}
922	>	Thread interruptedThread = newStartedThread(
923	>	new CheckedInterruptedRunnable() {
924	>	public void realRun() throws InterruptedException {
925	>	while (q.isEmpty())
926	>	Thread.yield();
927	>	q.transfer(five);
928		}});
928	–	interruptedThread.start();
929
930		while (q.size() < 2)
931		Thread.yield();
932		assertEquals(2, q.size());
933	<	assertEquals(SIZE + 1, (int) q.poll());
933	>	assertSame(four, q.poll());
934		first.join();
935		assertEquals(1, q.size());
936		interruptedThread.interrupt();
937		interruptedThread.join();
938	<	assertEquals(0, q.size());
939	<	assertTrue(q.isEmpty());
938	>	checkEmpty(q);
939		}
940
941		/**
942	<	* transfer will wait as long as a poll or take occurs if one does occur
943	<	* the waiting is finished and the thread that tries to poll/take
945	<	* wins in retrieving the element
942	>	* transfer waits until a poll occurs, at which point the polling
943	>	* thread returns the element
944		*/
945		public void testTransfer4() throws InterruptedException {
946		final LinkedTransferQueue q = new LinkedTransferQueue();
947	<	new Thread(new Runnable() {
948	<	public void run() {
949	<	try {
950	<	q.transfer(four);
951	<	threadAssertFalse(q.contains(four));
952	<	threadAssertEquals(three, q.poll());
953	<	} catch (Throwable ex) {
954	<	threadUnexpectedException(ex);
955	<	}
956	<	}}).start();
957	<	Thread.sleep(MEDIUM_DELAY_MS);
947	>
948	>	Thread t = newStartedThread(new CheckedRunnable() {
949	>	public void realRun() throws InterruptedException {
950	>	q.transfer(four);
951	>	assertFalse(q.contains(four));
952	>	assertSame(three, q.poll());
953	>	}});
954	>
955	>	while (q.isEmpty())
956	>	Thread.yield();
957	>	assertFalse(q.isEmpty());
958	>	assertEquals(1, q.size());
959		assertTrue(q.offer(three));
960	<	assertEquals(four, q.poll());
960	>	assertSame(four, q.poll());
961	>	awaitTermination(t, MEDIUM_DELAY_MS);
962	>	}
963	>
964	>	/**
965	>	* transfer waits until a take occurs. The transfered element
966	>	* is returned by this associated take.
967	>	*/
968	>	public void testTransfer5() throws InterruptedException {
969	>	final LinkedTransferQueue<Integer> q
970	>	= new LinkedTransferQueue<Integer>();
971	>
972	>	Thread t = newStartedThread(new CheckedRunnable() {
973	>	public void realRun() throws InterruptedException {
974	>	q.transfer(four);
975	>	checkEmpty(q);
976	>	}});
977	>
978	>	while (q.isEmpty())
979	>	Thread.yield();
980	>	assertFalse(q.isEmpty());
981	>	assertEquals(1, q.size());
982	>	assertSame(four, q.take());
983	>	checkEmpty(q);
984	>	awaitTermination(t, MEDIUM_DELAY_MS);
985		}
986
987		/**
#	Line 968 | Line 991 | public class LinkedTransferQueueTest ext
991		try {
992		final LinkedTransferQueue q = new LinkedTransferQueue();
993		q.tryTransfer(null);
994	<	this.shouldThrow();
995	<	} catch (NullPointerException ex) {
973	<	}
994	>	shouldThrow();
995	>	} catch (NullPointerException success) {}
996		}
997
998		/**
999		* tryTransfer returns false and does not enqueue if there are no
1000		* consumers waiting to poll or take.
1001		*/
1002	<	public void testTryTransfer2() {
1002	>	public void testTryTransfer2() throws InterruptedException {
1003		final LinkedTransferQueue q = new LinkedTransferQueue();
1004		assertFalse(q.tryTransfer(new Object()));
1005		assertFalse(q.hasWaitingConsumer());
1006	<	assertTrue(q.isEmpty());
985	<	assertEquals(0, q.size());
1006	>	checkEmpty(q);
1007		}
1008
1009		/**
#	Line 992 | Line 1013 | public class LinkedTransferQueueTest ext
1013		public void testTryTransfer3() throws InterruptedException {
1014		final Object hotPotato = new Object();
1015		final LinkedTransferQueue q = new LinkedTransferQueue();
1016	<	new Thread(new Runnable() {
1017	<	public void run() {
1018	<	try {
1019	<	while (! q.hasWaitingConsumer())
1020	<	Thread.yield();
1021	<	threadAssertTrue(q.hasWaitingConsumer());
1022	<	threadAssertTrue(q.isEmpty());
1023	<	threadAssertTrue(q.size() == 0);
1024	<	threadAssertTrue(q.tryTransfer(hotPotato));
1025	<	} catch (Throwable ex) {
1026	<	threadUnexpectedException(ex);
1027	<	}
1028	<	}}).start();
1008	<	assertTrue(q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS) == hotPotato);
1009	<	assertTrue(q.isEmpty());
1016	>
1017	>	Thread t = newStartedThread(new CheckedRunnable() {
1018	>	public void realRun() {
1019	>	while (! q.hasWaitingConsumer())
1020	>	Thread.yield();
1021	>	assertTrue(q.hasWaitingConsumer());
1022	>	checkEmpty(q);
1023	>	assertTrue(q.tryTransfer(hotPotato));
1024	>	}});
1025	>
1026	>	assertSame(hotPotato, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
1027	>	checkEmpty(q);
1028	>	awaitTermination(t, MEDIUM_DELAY_MS);
1029		}
1030
1031		/**
#	Line 1016 | Line 1035 | public class LinkedTransferQueueTest ext
1035		public void testTryTransfer4() throws InterruptedException {
1036		final Object hotPotato = new Object();
1037		final LinkedTransferQueue q = new LinkedTransferQueue();
1038	<	new Thread(new Runnable() {
1039	<	public void run() {
1040	<	try {
1041	<	while (! q.hasWaitingConsumer())
1042	<	Thread.yield();
1043	<	threadAssertTrue(q.hasWaitingConsumer());
1044	<	threadAssertTrue(q.isEmpty());
1045	<	threadAssertTrue(q.size() == 0);
1046	<	threadAssertTrue(q.tryTransfer(hotPotato));
1047	<	} catch (Throwable ex) {
1048	<	threadUnexpectedException(ex);
1049	<	}
1050	<	}}).start();
1032	<	assertTrue(q.take() == hotPotato);
1033	<	assertTrue(q.isEmpty());
1038	>
1039	>	Thread t = newStartedThread(new CheckedRunnable() {
1040	>	public void realRun() {
1041	>	while (! q.hasWaitingConsumer())
1042	>	Thread.yield();
1043	>	assertTrue(q.hasWaitingConsumer());
1044	>	checkEmpty(q);
1045	>	assertTrue(q.tryTransfer(hotPotato));
1046	>	}});
1047	>
1048	>	assertSame(q.take(), hotPotato);
1049	>	checkEmpty(q);
1050	>	awaitTermination(t, MEDIUM_DELAY_MS);
1051		}
1052
1053		/**
1054	<	* tryTransfer waits the amount given if interrupted, show an
1055	<	* interrupted exception
1054	>	* tryTransfer waits the amount given, and throws
1055	>	* InterruptedException when interrupted.
1056		*/
1057		public void testTryTransfer5() throws InterruptedException {
1058		final LinkedTransferQueue q = new LinkedTransferQueue();
1059	<	Thread toInterrupt = new Thread(new Runnable() {
1060	<	public void run() {
1059	>	final CountDownLatch threadStarted = new CountDownLatch(1);
1060	>	assertTrue(q.isEmpty());
1061	>
1062	>	Thread t = newStartedThread(new CheckedRunnable() {
1063	>	public void realRun() throws InterruptedException {
1064	>	long t0 = System.nanoTime();
1065	>	threadStarted.countDown();
1066		try {
1067	<	q.tryTransfer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
1068	<	threadShouldThrow();
1069	<	} catch (InterruptedException success) {
1070	<	} catch (Throwable ex) {
1071	<	threadUnexpectedException(ex);
1050	<	}
1067	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
1068	>	shouldThrow();
1069	>	} catch (InterruptedException success) {}
1070	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
1071	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
1072		}});
1073	<	toInterrupt.start();
1074	<	Thread.sleep(SMALL_DELAY_MS);
1075	<	toInterrupt.interrupt();
1073	>
1074	>	threadStarted.await();
1075	>	while (q.isEmpty())
1076	>	Thread.yield();
1077	>	Thread.sleep(SHORT_DELAY_MS);
1078	>	t.interrupt();
1079	>	awaitTermination(t, MEDIUM_DELAY_MS);
1080	>	checkEmpty(q);
1081		}
1082
1083		/**
1084	<	* tryTransfer gives up after the timeout and return false
1084	>	* tryTransfer gives up after the timeout and returns false
1085		*/
1086		public void testTryTransfer6() throws InterruptedException {
1087		final LinkedTransferQueue q = new LinkedTransferQueue();
1088	<	new Thread(new Runnable() {
1089	<	public void run() {
1090	<	try {
1091	<	threadAssertFalse(q.tryTransfer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
1092	<	} catch (Throwable ex) {
1093	<	threadUnexpectedException(ex);
1094	<	}
1095	<	}}).start();
1096	<	Thread.sleep(LONG_DELAY_MS);
1097	<	assertTrue(q.isEmpty());
1088	>
1089	>	Thread t = newStartedThread(new CheckedRunnable() {
1090	>	public void realRun() throws InterruptedException {
1091	>	long t0 = System.nanoTime();
1092	>	assertFalse(q.tryTransfer(new Object(),
1093	>	SHORT_DELAY_MS, MILLISECONDS));
1094	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
1095	>	checkEmpty(q);
1096	>	}});
1097	>
1098	>	awaitTermination(t, MEDIUM_DELAY_MS);
1099	>	checkEmpty(q);
1100		}
1101
1102		/**
#	Line 1078 | Line 1106 | public class LinkedTransferQueueTest ext
1106		public void testTryTransfer7() throws InterruptedException {
1107		final LinkedTransferQueue q = new LinkedTransferQueue();
1108		assertTrue(q.offer(four));
1109	<	new Thread(new Runnable() {
1110	<	public void run() {
1111	<	try {
1112	<	threadAssertTrue(q.tryTransfer(five, LONG_DELAY_MS, TimeUnit.MILLISECONDS));
1113	<	threadAssertTrue(q.isEmpty());
1114	<	} catch (Throwable ex) {
1115	<	threadUnexpectedException(ex);
1116	<	}
1117	<	}}).start();
1090	<	Thread.sleep(SHORT_DELAY_MS);
1109	>
1110	>	Thread t = newStartedThread(new CheckedRunnable() {
1111	>	public void realRun() throws InterruptedException {
1112	>	assertTrue(q.tryTransfer(five, MEDIUM_DELAY_MS, MILLISECONDS));
1113	>	checkEmpty(q);
1114	>	}});
1115	>
1116	>	while (q.size() != 2)
1117	>	Thread.yield();
1118		assertEquals(2, q.size());
1119	<	assertEquals(four, q.poll());
1120	<	assertEquals(five, q.poll());
1121	<	assertTrue(q.isEmpty());
1119	>	assertSame(four, q.poll());
1120	>	assertSame(five, q.poll());
1121	>	checkEmpty(q);
1122	>	awaitTermination(t, MEDIUM_DELAY_MS);
1123		}
1124
1125		/**
1126	<	* tryTransfer attempts to enqueue into the q and fails returning
1127	<	* false not enqueueing and the successive poll is null
1126	>	* tryTransfer attempts to enqueue into the queue and fails
1127	>	* returning false not enqueueing and the successive poll is null
1128		*/
1129		public void testTryTransfer8() throws InterruptedException {
1130		final LinkedTransferQueue q = new LinkedTransferQueue();
1131		assertTrue(q.offer(four));
1132		assertEquals(1, q.size());
1133	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
1133	>	long t0 = System.nanoTime();
1134	>	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
1135	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
1136		assertEquals(1, q.size());
1137	<	assertEquals(four, q.poll());
1108	<	threadAssertTrue(q.isEmpty());
1137	>	assertSame(four, q.poll());
1138		assertNull(q.poll());
1139	+	checkEmpty(q);
1140		}
1141
1142		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1143		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1144	<	assertTrue(q.isEmpty());
1144	>	checkEmpty(q);
1145		for (int i = 0; i < n; i++) {
1146		assertEquals(i, q.size());
1147		assertTrue(q.offer(i));
#	Line 1120 | Line 1150 | public class LinkedTransferQueueTest ext
1150		assertFalse(q.isEmpty());
1151		return q;
1152		}
1123	–
1124	–	private static class ConsumerObserver {
1125	–
1126	–	private int waitingConsumers;
1127	–
1128	–	private ConsumerObserver() {
1129	–	}
1130	–
1131	–	private void setWaitingConsumer(int i) {
1132	–	this.waitingConsumers = i;
1133	–	}
1134	–
1135	–	private int getWaitingConsumers() {
1136	–	return waitingConsumers;
1137	–	}
1138	–	}
1153		}

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