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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 1.42 by jsr166, Thu Nov 18 20:21:53 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	>	void checkEmpty(BlockingQueue q) {
44	>	try {
45	>	assertTrue(q.isEmpty());
46	>	assertEquals(0, q.size());
47	>	assertNull(q.peek());
48	>	assertNull(q.poll());
49	>	assertNull(q.poll(0, MILLISECONDS));
50	>	assertEquals(q.toString(), "[]");
51	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
52	>	assertFalse(q.iterator().hasNext());
53	>	try {
54	>	q.element();
55	>	shouldThrow();
56	>	} catch (NoSuchElementException success) {}
57	>	try {
58	>	q.iterator().next();
59	>	shouldThrow();
60	>	} catch (NoSuchElementException success) {}
61	>	try {
62	>	q.remove();
63	>	shouldThrow();
64	>	} catch (NoSuchElementException success) {}
65	>	} catch (InterruptedException ie) {
66	>	threadUnexpectedException(ie);
67	>	}
68		}
69
70		/**
71	<	* Constructor builds new queue with size being zero and empty being true
71	>	* Constructor builds new queue with size being zero and empty
72	>	* being true
73		*/
74		public void testConstructor1() {
75		assertEquals(0, new LinkedTransferQueue().size());
#	Line 39 | Line 77 | public class LinkedTransferQueueTest ext
77		}
78
79		/**
80	<	* Initializing constructor with null collection throws NullPointerException
80	>	* Initializing constructor with null collection throws
81	>	* NullPointerException
82		*/
83		public void testConstructor2() {
84		try {
85		new LinkedTransferQueue(null);
86		shouldThrow();
87	<	} catch (NullPointerException success) {
49	<	}
87	>	} catch (NullPointerException success) {}
88		}
89
90		/**
91	<	* Initializing from Collection of null elements throws NullPointerException
91	>	* Initializing from Collection of null elements throws
92	>	* NullPointerException
93		*/
94		public void testConstructor3() {
95		try {
96		Integer[] ints = new Integer[SIZE];
97	<	LinkedTransferQueue q = new LinkedTransferQueue(Arrays.asList(ints));
97	>	new LinkedTransferQueue(Arrays.asList(ints));
98		shouldThrow();
99	<	} catch (NullPointerException success) {
61	<	}
99	>	} catch (NullPointerException success) {}
100		}
101
102		/**
#	Line 71 | Line 109 | public class LinkedTransferQueueTest ext
109		for (int i = 0; i < SIZE - 1; ++i) {
110		ints[i] = i;
111		}
112	<	LinkedTransferQueue q = new LinkedTransferQueue(Arrays.asList(ints));
112	>	new LinkedTransferQueue(Arrays.asList(ints));
113		shouldThrow();
114	<	} catch (NullPointerException success) {
77	<	}
114	>	} catch (NullPointerException success) {}
115		}
116
117		/**
118		* Queue contains all elements of the collection it is initialized by
119		*/
120		public void testConstructor5() {
121	<	try {
122	<	Integer[] ints = new Integer[SIZE];
123	<	for (int i = 0; i < SIZE; ++i) {
124	<	ints[i] = i;
125	<	}
126	<	LinkedTransferQueue q = new LinkedTransferQueue(Arrays.asList(ints));
127	<	for (int i = 0; i < SIZE; ++i) {
128	<	assertEquals(ints[i], q.poll());
129	<	}
130	<	} finally {
121	>	Integer[] ints = new Integer[SIZE];
122	>	for (int i = 0; i < SIZE; ++i) {
123	>	ints[i] = i;
124	>	}
125	>	List intList = Arrays.asList(ints);
126	>	LinkedTransferQueue q
127	>	= new LinkedTransferQueue(intList);
128	>	assertEquals(q.size(), intList.size());
129	>	assertEquals(q.toString(), intList.toString());
130	>	assertTrue(Arrays.equals(q.toArray(),
131	>	intList.toArray()));
132	>	assertTrue(Arrays.equals(q.toArray(new Object[0]),
133	>	intList.toArray(new Object[0])));
134	>	assertTrue(Arrays.equals(q.toArray(new Object[SIZE]),
135	>	intList.toArray(new Object[SIZE])));
136	>	for (int i = 0; i < SIZE; ++i) {
137	>	assertEquals(ints[i], q.poll());
138		}
139		}
140
141		/**
142	<	* Remaining capacity never decrease nor increase on add or remove
142	>	* remainingCapacity() always returns Integer.MAX_VALUE
143		*/
144		public void testRemainingCapacity() {
145		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
#	Line 119 | Line 163 | public class LinkedTransferQueueTest ext
163		LinkedTransferQueue q = new LinkedTransferQueue();
164		q.offer(null);
165		shouldThrow();
166	<	} catch (NullPointerException success) {
123	<	}
166	>	} catch (NullPointerException success) {}
167		}
168
169		/**
#	Line 131 | Line 174 | public class LinkedTransferQueueTest ext
174		LinkedTransferQueue q = new LinkedTransferQueue();
175		q.add(null);
176		shouldThrow();
177	<	} catch (NullPointerException success) {
135	<	}
177	>	} catch (NullPointerException success) {}
178		}
179
180		/**
#	Line 143 | Line 185 | public class LinkedTransferQueueTest ext
185		LinkedTransferQueue q = new LinkedTransferQueue();
186		q.addAll(null);
187		shouldThrow();
188	<	} catch (NullPointerException success) {
147	<	}
188	>	} catch (NullPointerException success) {}
189		}
190
191		/**
#	Line 155 | Line 196 | public class LinkedTransferQueueTest ext
196		LinkedTransferQueue q = populatedQueue(SIZE);
197		q.addAll(q);
198		shouldThrow();
199	<	} catch (IllegalArgumentException success) {
159	<	}
199	>	} catch (IllegalArgumentException success) {}
200		}
201
202		/**
#	Line 168 | Line 208 | public class LinkedTransferQueueTest ext
208		Integer[] ints = new Integer[SIZE];
209		q.addAll(Arrays.asList(ints));
210		shouldThrow();
211	<	} catch (NullPointerException success) {
172	<	}
211	>	} catch (NullPointerException success) {}
212		}
213
214		/**
215	<	* addAll of a collection with any null elements throws NullPointerException after
216	<	* possibly adding some elements
215	>	* addAll of a collection with any null elements throws
216	>	* NullPointerException after possibly adding some elements
217		*/
218		public void testAddAll3() {
219		try {
#	Line 185 | Line 224 | public class LinkedTransferQueueTest ext
224		}
225		q.addAll(Arrays.asList(ints));
226		shouldThrow();
227	<	} catch (NullPointerException success) {
189	<	}
227	>	} catch (NullPointerException success) {}
228		}
229
230		/**
#	Line 223 | Line 261 | public class LinkedTransferQueueTest ext
261		public void testPut() {
262		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
263		for (int i = 0; i < SIZE; ++i) {
264	+	assertEquals(q.size(), i);
265		q.put(i);
266		assertTrue(q.contains(i));
267		}
229	–	assertEquals(q.size(), SIZE);
268		}
269
270		/**
#	Line 240 | Line 278 | public class LinkedTransferQueueTest ext
278		}
279
280		/**
281	<	* 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
281	>	* take removes existing elements until empty, then blocks interruptibly
282		*/
283		public void testBlockingTake() throws InterruptedException {
284	<	Thread t = new Thread(new Runnable() {
285	<	public void run() {
284	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
285	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
286	>	Thread t = newStartedThread(new CheckedRunnable() {
287	>	public void realRun() throws InterruptedException {
288	>	for (int i = 0; i < SIZE; ++i) {
289	>	assertEquals(i, (int) q.take());
290	>	}
291	>	aboutToWait.countDown();
292		try {
270	–	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
271	–	for (int i = 0; i < SIZE; ++i) {
272	–	threadAssertEquals(i, (int) q.take());
273	–	}
293		q.take();
294	<	threadShouldThrow();
295	<	} catch (InterruptedException success) {
277	<	} catch (Throwable ex) {
278	<	threadUnexpectedException(ex);
279	<	}
294	>	shouldThrow();
295	>	} catch (InterruptedException success) {}
296		}});
297	<	t.start();
298	<	Thread.sleep(SHORT_DELAY_MS);
297	>
298	>	aboutToWait.await();
299	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
300		t.interrupt();
301	<	t.join();
301	>	awaitTermination(t, MEDIUM_DELAY_MS);
302	>	checkEmpty(q);
303		}
304
305		/**
306		* poll succeeds unless empty
307		*/
308	<	public void testPoll() {
308	>	public void testPoll() throws InterruptedException {
309		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
310		for (int i = 0; i < SIZE; ++i) {
311		assertEquals(i, (int) q.poll());
312		}
313		assertNull(q.poll());
314	+	checkEmpty(q);
315		}
316
317		/**
318	<	* timed pool with zero timeout succeeds when non-empty, else times out
318	>	* timed poll with zero timeout succeeds when non-empty, else times out
319		*/
320		public void testTimedPoll0() throws InterruptedException {
321		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
322		for (int i = 0; i < SIZE; ++i) {
323	<	assertEquals(i, (int) q.poll(0, TimeUnit.MILLISECONDS));
323	>	assertEquals(i, (int) q.poll(0, MILLISECONDS));
324		}
325	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
325	>	assertNull(q.poll(0, MILLISECONDS));
326	>	checkEmpty(q);
327		}
328
329		/**
330	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
330	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
331		*/
332		public void testTimedPoll() throws InterruptedException {
333		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
334		for (int i = 0; i < SIZE; ++i) {
335	<	assertEquals(i, (int) q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
336	<	}
337	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
335	>	long t0 = System.nanoTime();
336	>	assertEquals(i, (int) q.poll(SMALL_DELAY_MS, MILLISECONDS));
337	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
338	>	}
339	>	long t0 = System.nanoTime();
340	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
341	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
342	>	checkEmpty(q);
343		}
344
345		/**
#	Line 322 | Line 347 | public class LinkedTransferQueueTest ext
347		* returning timeout status
348		*/
349		public void testInterruptedTimedPoll() throws InterruptedException {
350	<	Thread t = new Thread(new Runnable() {
351	<	public void run() {
350	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
351	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
352	>	Thread t = newStartedThread(new CheckedRunnable() {
353	>	public void realRun() throws InterruptedException {
354	>	for (int i = 0; i < SIZE; ++i) {
355	>	long t0 = System.nanoTime();
356	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
357	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
358	>	}
359	>	long t0 = System.nanoTime();
360	>	aboutToWait.countDown();
361		try {
362	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
363	<	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));
362	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
363	>	shouldThrow();
364		} catch (InterruptedException success) {
365	<	} catch (Throwable ex) {
335	<	threadUnexpectedException(ex);
365	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
366		}
367		}});
368	<	t.start();
369	<	Thread.sleep(SHORT_DELAY_MS);
368	>
369	>	aboutToWait.await();
370	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
371		t.interrupt();
372	<	t.join();
372	>	awaitTermination(t, MEDIUM_DELAY_MS);
373	>	checkEmpty(q);
374		}
375
376		/**
377	<	* timed poll before a delayed offer fails; after offer succeeds;
378	<	* on interruption throws
377	>	* timed poll after thread interrupted throws InterruptedException
378	>	* instead of returning timeout status
379		*/
380	<	public void testTimedPollWithOffer() throws InterruptedException {
381	<	final LinkedTransferQueue q = new LinkedTransferQueue();
382	<	Thread t = new Thread(new Runnable() {
383	<	public void run() {
384	<	try {
385	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
386	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
387	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
388	<	threadShouldThrow();
357	<	} catch (InterruptedException success) {
358	<	} catch (Throwable ex) {
359	<	threadUnexpectedException(ex);
380	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
381	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
382	>	Thread t = newStartedThread(new CheckedRunnable() {
383	>	public void realRun() throws InterruptedException {
384	>	Thread.currentThread().interrupt();
385	>	for (int i = 0; i < SIZE; ++i) {
386	>	long t0 = System.nanoTime();
387	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
388	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
389		}
390	+	try {
391	+	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
392	+	shouldThrow();
393	+	} catch (InterruptedException success) {}
394		}});
395	<	t.start();
396	<	Thread.sleep(SMALL_DELAY_MS);
397	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
365	<	t.interrupt();
366	<	t.join();
395	>
396	>	awaitTermination(t, MEDIUM_DELAY_MS);
397	>	checkEmpty(q);
398		}
399
400		/**
401		* peek returns next element, or null if empty
402		*/
403	<	public void testPeek() {
403	>	public void testPeek() throws InterruptedException {
404		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
405		for (int i = 0; i < SIZE; ++i) {
406		assertEquals(i, (int) q.peek());
#	Line 378 | Line 409 | public class LinkedTransferQueueTest ext
409		i != (int) q.peek());
410		}
411		assertNull(q.peek());
412	+	checkEmpty(q);
413		}
414
415		/**
416		* element returns next element, or throws NoSuchElementException if empty
417		*/
418	<	public void testElement() {
418	>	public void testElement() throws InterruptedException {
419		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
420		for (int i = 0; i < SIZE; ++i) {
421		assertEquals(i, (int) q.element());
#	Line 392 | Line 424 | public class LinkedTransferQueueTest ext
424		try {
425		q.element();
426		shouldThrow();
427	<	} catch (NoSuchElementException success) {
428	<	}
427	>	} catch (NoSuchElementException success) {}
428	>	checkEmpty(q);
429		}
430
431		/**
432		* remove removes next element, or throws NoSuchElementException if empty
433		*/
434	<	public void testRemove() {
434	>	public void testRemove() throws InterruptedException {
435		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
436		for (int i = 0; i < SIZE; ++i) {
437		assertEquals(i, (int) q.remove());
#	Line 407 | Line 439 | public class LinkedTransferQueueTest ext
439		try {
440		q.remove();
441		shouldThrow();
442	<	} catch (NoSuchElementException success) {
443	<	}
442	>	} catch (NoSuchElementException success) {}
443	>	checkEmpty(q);
444		}
445
446		/**
447		* remove(x) removes x and returns true if present
448		*/
449	<	public void testRemoveElement() {
449	>	public void testRemoveElement() throws InterruptedException {
450		LinkedTransferQueue q = populatedQueue(SIZE);
451	<	for (int i = 1; i < SIZE; i += 2) {
451	>	for (int i = 1; i < SIZE; i+=2) {
452	>	assertTrue(q.contains(i));
453		assertTrue(q.remove(i));
454	+	assertFalse(q.contains(i));
455	+	assertTrue(q.contains(i-1));
456		}
457	<	for (int i = 0; i < SIZE; i += 2) {
457	>	for (int i = 0; i < SIZE; i+=2) {
458	>	assertTrue(q.contains(i));
459		assertTrue(q.remove(i));
460	<	assertFalse(q.remove(i + 1));
460	>	assertFalse(q.contains(i));
461	>	assertFalse(q.remove(i+1));
462	>	assertFalse(q.contains(i+1));
463		}
464	<	assertTrue(q.isEmpty());
464	>	checkEmpty(q);
465		}
466
467		/**
#	Line 436 | Line 474 | public class LinkedTransferQueueTest ext
474		assertTrue(q.remove(one));
475		assertTrue(q.remove(two));
476		assertTrue(q.add(three));
477	<	assertTrue(q.take() != null);
477	>	assertSame(q.take(), three);
478		}
479
480		/**
#	Line 454 | Line 492 | public class LinkedTransferQueueTest ext
492		/**
493		* clear removes all elements
494		*/
495	<	public void testClear() {
495	>	public void testClear() throws InterruptedException {
496		LinkedTransferQueue q = populatedQueue(SIZE);
497		q.clear();
498	<	assertTrue(q.isEmpty());
461	<	assertEquals(0, q.size());
498	>	checkEmpty(q);
499		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
500		q.add(one);
501		assertFalse(q.isEmpty());
502	+	assertEquals(1, q.size());
503		assertTrue(q.contains(one));
504		q.clear();
505	<	assertTrue(q.isEmpty());
505	>	checkEmpty(q);
506		}
507
508		/**
#	Line 482 | Line 520 | public class LinkedTransferQueueTest ext
520		}
521
522		/**
523	<	* retainAll(c) retains only those elements of c and reports true if changed
523	>	* retainAll(c) retains only those elements of c and reports true
524	>	* if changed
525		*/
526		public void testRetainAll() {
527		LinkedTransferQueue q = populatedQueue(SIZE);
#	Line 501 | Line 540 | public class LinkedTransferQueueTest ext
540		}
541
542		/**
543	<	* removeAll(c) removes only those elements of c and reports true if changed
543	>	* removeAll(c) removes only those elements of c and reports true
544	>	* if changed
545		*/
546		public void testRemoveAll() {
547		for (int i = 1; i < SIZE; ++i) {
#	Line 516 | Line 556 | public class LinkedTransferQueueTest ext
556		}
557
558		/**
559	<	* toArray contains all elements
559	>	* toArray() contains all elements in FIFO order
560		*/
561	<	public void testToArray() throws InterruptedException {
561	>	public void testToArray() {
562		LinkedTransferQueue q = populatedQueue(SIZE);
563		Object[] o = q.toArray();
564		for (int i = 0; i < o.length; i++) {
565	<	assertEquals(o[i], q.take());
565	>	assertSame(o[i], q.poll());
566		}
567		}
568
569		/**
570	<	* toArray(a) contains all elements
570	>	* toArray(a) contains all elements in FIFO order
571		*/
572	<	public void testToArray2() throws InterruptedException {
572	>	public void testToArray2() {
573		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
574		Integer[] ints = new Integer[SIZE];
575	<	ints = q.toArray(ints);
575	>	Integer[] array = q.toArray(ints);
576	>	assertSame(ints, array);
577		for (int i = 0; i < ints.length; i++) {
578	<	assertEquals(ints[i], q.take());
578	>	assertSame(ints[i], q.poll());
579		}
580		}
581
582		/**
583		* toArray(null) throws NullPointerException
584		*/
585	<	public void testToArray_BadArg() {
585	>	public void testToArray_NullArg() {
586	>	LinkedTransferQueue q = populatedQueue(SIZE);
587		try {
588	<	LinkedTransferQueue q = populatedQueue(SIZE);
547	<	Object o[] = q.toArray(null);
588	>	q.toArray(null);
589		shouldThrow();
590	<	} catch (NullPointerException success) {
550	<	}
590	>	} catch (NullPointerException success) {}
591		}
592
593		/**
594	<	* toArray with incompatible array type throws CCE
594	>	* toArray(incompatible array type) throws ArrayStoreException
595		*/
596		public void testToArray1_BadArg() {
597	+	LinkedTransferQueue q = populatedQueue(SIZE);
598		try {
599	<	LinkedTransferQueue q = populatedQueue(SIZE);
559	<	Object o[] = q.toArray(new String[10]);
599	>	q.toArray(new String[10]);
600		shouldThrow();
601	<	} catch (ArrayStoreException success) {
562	<	}
601	>	} catch (ArrayStoreException success) {}
602		}
603
604		/**
#	Line 568 | Line 607 | public class LinkedTransferQueueTest ext
607		public void testIterator() throws InterruptedException {
608		LinkedTransferQueue q = populatedQueue(SIZE);
609		Iterator it = q.iterator();
610	+	int i = 0;
611		while (it.hasNext()) {
612	<	assertEquals(it.next(), q.take());
612	>	assertEquals(it.next(), i++);
613		}
614	+	assertEquals(i, SIZE);
615		}
616
617		/**
618	<	* iterator.remove removes current element
618	>	* iterator.remove() removes current element
619		*/
620		public void testIteratorRemove() {
621		final LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 587 | Line 628 | public class LinkedTransferQueueTest ext
628		it.remove();
629
630		it = q.iterator();
631	<	assertEquals(it.next(), one);
632	<	assertEquals(it.next(), three);
631	>	assertSame(it.next(), one);
632	>	assertSame(it.next(), three);
633		assertFalse(it.hasNext());
634		}
635
#	Line 596 | Line 637 | public class LinkedTransferQueueTest ext
637		* iterator ordering is FIFO
638		*/
639		public void testIteratorOrdering() {
640	<	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
640	>	final LinkedTransferQueue<Integer> q
641	>	= new LinkedTransferQueue<Integer>();
642		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
643		q.add(one);
644		q.add(two);
#	Line 640 | Line 682 | public class LinkedTransferQueueTest ext
682		*/
683		public void testOfferInExecutor() {
684		final LinkedTransferQueue q = new LinkedTransferQueue();
685	<	q.add(one);
644	<	q.add(two);
685	>	final CountDownLatch threadsStarted = new CountDownLatch(2);
686		ExecutorService executor = Executors.newFixedThreadPool(2);
687	<	executor.execute(new Runnable() {
688	<	public void run() {
689	<	try {
690	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
691	<	} catch (Throwable ex) {
692	<	threadUnexpectedException(ex);
652	<	}
687	>
688	>	executor.execute(new CheckedRunnable() {
689	>	public void realRun() throws InterruptedException {
690	>	threadsStarted.countDown();
691	>	threadsStarted.await();
692	>	assertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
693		}});
694
695	<	executor.execute(new Runnable() {
696	<	public void run() {
697	<	try {
698	<	Thread.sleep(SMALL_DELAY_MS);
699	<	threadAssertEquals(one, q.take());
700	<	} catch (Throwable ex) {
661	<	threadUnexpectedException(ex);
662	<	}
695	>	executor.execute(new CheckedRunnable() {
696	>	public void realRun() throws InterruptedException {
697	>	threadsStarted.countDown();
698	>	threadsStarted.await();
699	>	assertSame(one, q.take());
700	>	checkEmpty(q);
701		}});
702
703		joinPool(executor);
704		}
705
706		/**
707	<	* poll retrieves elements across Executor threads
707	>	* timed poll retrieves elements across Executor threads
708		*/
709		public void testPollInExecutor() {
710		final LinkedTransferQueue q = new LinkedTransferQueue();
711	+	final CountDownLatch threadsStarted = new CountDownLatch(2);
712		ExecutorService executor = Executors.newFixedThreadPool(2);
713	<	executor.execute(new Runnable() {
714	<	public void run() {
715	<	try {
716	<	threadAssertNull(q.poll());
717	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
718	<	threadAssertTrue(q.isEmpty());
719	<	} catch (Throwable  ex) {
720	<	threadUnexpectedException(ex);
682	<	}
713	>
714	>	executor.execute(new CheckedRunnable() {
715	>	public void realRun() throws InterruptedException {
716	>	assertNull(q.poll());
717	>	threadsStarted.countDown();
718	>	threadsStarted.await();
719	>	assertSame(one, q.poll(SMALL_DELAY_MS, MILLISECONDS));
720	>	checkEmpty(q);
721		}});
722
723	<	executor.execute(new Runnable() {
724	<	public void run() {
725	<	try {
726	<	Thread.sleep(SMALL_DELAY_MS);
727	<	q.put(one);
690	<	} catch (Throwable ex) {
691	<	threadUnexpectedException(ex);
692	<	}
723	>	executor.execute(new CheckedRunnable() {
724	>	public void realRun() throws InterruptedException {
725	>	threadsStarted.countDown();
726	>	threadsStarted.await();
727	>	q.put(one);
728		}});
729
730		joinPool(executor);
#	Line 702 | Line 737 | public class LinkedTransferQueueTest ext
737		LinkedTransferQueue q = populatedQueue(SIZE);
738
739		ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
740	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
740	>	ObjectOutputStream out
741	>	= new ObjectOutputStream(new BufferedOutputStream(bout));
742		out.writeObject(q);
743		out.close();
744
745	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
746	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
745	>	ByteArrayInputStream bin
746	>	= new ByteArrayInputStream(bout.toByteArray());
747	>	ObjectInputStream in
748	>	= new ObjectInputStream(new BufferedInputStream(bin));
749		LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
750
751		assertEquals(q.size(), r.size());
752	+	assertEquals(q.toString(), r.toString());
753	+	assertTrue(Arrays.equals(q.toArray(), r.toArray()));
754		while (!q.isEmpty()) {
755		assertEquals(q.remove(), r.remove());
756		}
#	Line 724 | Line 764 | public class LinkedTransferQueueTest ext
764		try {
765		q.drainTo(null);
766		shouldThrow();
767	<	} catch (NullPointerException success) {
728	<	}
767	>	} catch (NullPointerException success) {}
768		}
769
770		/**
#	Line 736 | Line 775 | public class LinkedTransferQueueTest ext
775		try {
776		q.drainTo(q);
777		shouldThrow();
778	<	} catch (IllegalArgumentException success) {
740	<	}
778	>	} catch (IllegalArgumentException success) {}
779		}
780
781		/**
#	Line 767 | Line 805 | public class LinkedTransferQueueTest ext
805		}
806
807		/**
808	<	* drainTo empties full queue, unblocking a waiting put.
808	>	* drainTo(c) empties full queue, unblocking a waiting put.
809		*/
810		public void testDrainToWithActivePut() throws InterruptedException {
811		final LinkedTransferQueue q = populatedQueue(SIZE);
812	<	Thread t = new Thread(new Runnable() {
813	<	public void run() {
814	<	try {
777	<	q.put(SIZE + 1);
778	<	} catch (Throwable ex) {
779	<	threadUnexpectedException(ex);
780	<	}
812	>	Thread t = newStartedThread(new CheckedRunnable() {
813	>	public void realRun() {
814	>	q.put(SIZE + 1);
815		}});
782	–	t.start();
816		ArrayList l = new ArrayList();
817		q.drainTo(l);
818		assertTrue(l.size() >= SIZE);
819		for (int i = 0; i < SIZE; ++i) {
820		assertEquals(l.get(i), i);
821		}
822	<	t.join();
822	>	awaitTermination(t, MEDIUM_DELAY_MS);
823		assertTrue(q.size() + l.size() >= SIZE);
824		}
825
#	Line 796 | Line 829 | public class LinkedTransferQueueTest ext
829		public void testDrainToNullN() {
830		LinkedTransferQueue q = populatedQueue(SIZE);
831		try {
832	<	q.drainTo(null, 0);
832	>	q.drainTo(null, SIZE);
833		shouldThrow();
834	<	} catch (NullPointerException success) {
802	<	}
834	>	} catch (NullPointerException success) {}
835		}
836
837		/**
#	Line 808 | Line 840 | public class LinkedTransferQueueTest ext
840		public void testDrainToSelfN() {
841		LinkedTransferQueue q = populatedQueue(SIZE);
842		try {
843	<	q.drainTo(q, 0);
843	>	q.drainTo(q, SIZE);
844		shouldThrow();
845	<	} catch (IllegalArgumentException success) {
814	<	}
845	>	} catch (IllegalArgumentException success) {}
846		}
847
848		/**
849	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
849	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
850		*/
851		public void testDrainToN() {
852		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 837 | Line 868 | public class LinkedTransferQueueTest ext
868		}
869
870		/**
871	<	* poll and take should decrement the waiting consumer count
871	>	* timed poll() or take() increments the waiting consumer count;
872	>	* offer(e) decrements the waiting consumer count
873		*/
874		public void testWaitingConsumer() throws InterruptedException {
875		final LinkedTransferQueue q = new LinkedTransferQueue();
876	<	final ConsumerObserver waiting = new ConsumerObserver();
877	<	new Thread(new Runnable() {
878	<	public void run() {
879	<	try {
880	<	threadAssertTrue(q.hasWaitingConsumer());
881	<	waiting.setWaitingConsumer(q.getWaitingConsumerCount());
882	<	threadAssertTrue(q.offer(new Object()));
883	<	} catch (Throwable ex) {
884	<	threadUnexpectedException(ex);
885	<	}
886	<	}}).start();
887	<	assertTrue(q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS) != null);
888	<	assertTrue(q.getWaitingConsumerCount() < waiting.getWaitingConsumers());
876	>	assertEquals(q.getWaitingConsumerCount(), 0);
877	>	assertFalse(q.hasWaitingConsumer());
878	>	final CountDownLatch threadStarted = new CountDownLatch(1);
879	>
880	>	Thread t = newStartedThread(new CheckedRunnable() {
881	>	public void realRun() throws InterruptedException {
882	>	threadStarted.countDown();
883	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
884	>	assertEquals(q.getWaitingConsumerCount(), 0);
885	>	assertFalse(q.hasWaitingConsumer());
886	>	}});
887	>
888	>	threadStarted.await();
889	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
890	>	assertEquals(q.getWaitingConsumerCount(), 1);
891	>	assertTrue(q.hasWaitingConsumer());
892	>
893	>	assertTrue(q.offer(one));
894	>	assertEquals(q.getWaitingConsumerCount(), 0);
895	>	assertFalse(q.hasWaitingConsumer());
896	>
897	>	awaitTermination(t, MEDIUM_DELAY_MS);
898		}
899
900		/**
#	Line 864 | Line 905 | public class LinkedTransferQueueTest ext
905		LinkedTransferQueue q = new LinkedTransferQueue();
906		q.transfer(null);
907		shouldThrow();
908	<	} catch (NullPointerException ex) {
868	<	}
908	>	} catch (NullPointerException success) {}
909		}
910
911		/**
912	<	* transfer attempts to insert into the queue then wait until that
913	<	* object is removed via take or poll.
912	>	* transfer waits until a poll occurs. The transfered element
913	>	* is returned by this associated poll.
914		*/
915		public void testTransfer2() throws InterruptedException {
916	<	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
917	<
918	<	new Thread(new Runnable() {
919	<	public void run() {
920	<	try {
921	<	q.transfer(SIZE);
922	<	threadAssertTrue(q.isEmpty());
923	<	} catch (Throwable ex) {
924	<	threadUnexpectedException(ex);
925	<	}
886	<	}}).start();
916	>	final LinkedTransferQueue<Integer> q
917	>	= new LinkedTransferQueue<Integer>();
918	>	final CountDownLatch threadStarted = new CountDownLatch(1);
919	>
920	>	Thread t = newStartedThread(new CheckedRunnable() {
921	>	public void realRun() throws InterruptedException {
922	>	threadStarted.countDown();
923	>	q.transfer(five);
924	>	checkEmpty(q);
925	>	}});
926
927	<	Thread.sleep(SHORT_DELAY_MS);
927	>	threadStarted.await();
928	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
929		assertEquals(1, q.size());
930	<	assertEquals(SIZE, (int) q.poll());
931	<	assertTrue(q.isEmpty());
930	>	assertSame(five, q.poll());
931	>	checkEmpty(q);
932	>	awaitTermination(t, MEDIUM_DELAY_MS);
933		}
934
935		/**
936	<	* transfer will attempt to transfer in fifo order and continue
896	<	* waiting if the element being transfered is not polled or taken
936	>	* transfer waits until a poll occurs, and then transfers in fifo order
937		*/
938		public void testTransfer3() throws InterruptedException {
939	<	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
939	>	final LinkedTransferQueue<Integer> q
940	>	= new LinkedTransferQueue<Integer>();
941
942	<	Thread first =
943	<	new Thread(new Runnable() {
944	<	public void run() {
945	<	try {
946	<	Integer i = SIZE + 1;
947	<	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();
942	>	Thread first = newStartedThread(new CheckedRunnable() {
943	>	public void realRun() throws InterruptedException {
944	>	q.transfer(four);
945	>	assertTrue(!q.contains(four));
946	>	assertEquals(1, q.size());
947	>	}});
948
949	<	Thread interruptedThread =
950	<	new Thread(new Runnable() {
951	<	public void run() {
952	<	try {
953	<	while (q.size() == 0)
954	<	Thread.yield();
921	<	q.transfer(SIZE);
922	<	threadShouldThrow();
923	<	} catch (InterruptedException success) {
924	<	} catch (Throwable ex) {
925	<	threadUnexpectedException(ex);
926	<	}
949	>	Thread interruptedThread = newStartedThread(
950	>	new CheckedInterruptedRunnable() {
951	>	public void realRun() throws InterruptedException {
952	>	while (q.isEmpty())
953	>	Thread.yield();
954	>	q.transfer(five);
955		}});
928	–	interruptedThread.start();
956
957		while (q.size() < 2)
958		Thread.yield();
959		assertEquals(2, q.size());
960	<	assertEquals(SIZE + 1, (int) q.poll());
960	>	assertSame(four, q.poll());
961		first.join();
962		assertEquals(1, q.size());
963		interruptedThread.interrupt();
964		interruptedThread.join();
965	<	assertEquals(0, q.size());
939	<	assertTrue(q.isEmpty());
965	>	checkEmpty(q);
966		}
967
968		/**
969	<	* transfer will wait as long as a poll or take occurs if one does occur
970	<	* the waiting is finished and the thread that tries to poll/take
945	<	* wins in retrieving the element
969	>	* transfer waits until a poll occurs, at which point the polling
970	>	* thread returns the element
971		*/
972		public void testTransfer4() throws InterruptedException {
973		final LinkedTransferQueue q = new LinkedTransferQueue();
974	<	new Thread(new Runnable() {
975	<	public void run() {
976	<	try {
977	<	q.transfer(four);
978	<	threadAssertFalse(q.contains(four));
979	<	threadAssertEquals(three, q.poll());
980	<	} catch (Throwable ex) {
981	<	threadUnexpectedException(ex);
982	<	}
983	<	}}).start();
984	<	Thread.sleep(MEDIUM_DELAY_MS);
974	>
975	>	Thread t = newStartedThread(new CheckedRunnable() {
976	>	public void realRun() throws InterruptedException {
977	>	q.transfer(four);
978	>	assertFalse(q.contains(four));
979	>	assertSame(three, q.poll());
980	>	}});
981	>
982	>	while (q.isEmpty())
983	>	Thread.yield();
984	>	assertFalse(q.isEmpty());
985	>	assertEquals(1, q.size());
986		assertTrue(q.offer(three));
987	<	assertEquals(four, q.poll());
987	>	assertSame(four, q.poll());
988	>	awaitTermination(t, MEDIUM_DELAY_MS);
989	>	}
990	>
991	>	/**
992	>	* transfer waits until a take occurs. The transfered element
993	>	* is returned by this associated take.
994	>	*/
995	>	public void testTransfer5() throws InterruptedException {
996	>	final LinkedTransferQueue<Integer> q
997	>	= new LinkedTransferQueue<Integer>();
998	>
999	>	Thread t = newStartedThread(new CheckedRunnable() {
1000	>	public void realRun() throws InterruptedException {
1001	>	q.transfer(four);
1002	>	checkEmpty(q);
1003	>	}});
1004	>
1005	>	while (q.isEmpty())
1006	>	Thread.yield();
1007	>	assertFalse(q.isEmpty());
1008	>	assertEquals(1, q.size());
1009	>	assertSame(four, q.take());
1010	>	checkEmpty(q);
1011	>	awaitTermination(t, MEDIUM_DELAY_MS);
1012		}
1013
1014		/**
#	Line 968 | Line 1018 | public class LinkedTransferQueueTest ext
1018		try {
1019		final LinkedTransferQueue q = new LinkedTransferQueue();
1020		q.tryTransfer(null);
1021	<	this.shouldThrow();
1022	<	} catch (NullPointerException ex) {
973	<	}
1021	>	shouldThrow();
1022	>	} catch (NullPointerException success) {}
1023		}
1024
1025		/**
1026		* tryTransfer returns false and does not enqueue if there are no
1027		* consumers waiting to poll or take.
1028		*/
1029	<	public void testTryTransfer2() {
1029	>	public void testTryTransfer2() throws InterruptedException {
1030		final LinkedTransferQueue q = new LinkedTransferQueue();
1031		assertFalse(q.tryTransfer(new Object()));
1032		assertFalse(q.hasWaitingConsumer());
1033	<	assertTrue(q.isEmpty());
985	<	assertEquals(0, q.size());
1033	>	checkEmpty(q);
1034		}
1035
1036		/**
#	Line 992 | Line 1040 | public class LinkedTransferQueueTest ext
1040		public void testTryTransfer3() throws InterruptedException {
1041		final Object hotPotato = new Object();
1042		final LinkedTransferQueue q = new LinkedTransferQueue();
1043	<	new Thread(new Runnable() {
1044	<	public void run() {
1045	<	try {
1046	<	while (! q.hasWaitingConsumer())
1047	<	Thread.yield();
1048	<	threadAssertTrue(q.hasWaitingConsumer());
1049	<	threadAssertTrue(q.isEmpty());
1050	<	threadAssertTrue(q.size() == 0);
1051	<	threadAssertTrue(q.tryTransfer(hotPotato));
1052	<	} catch (Throwable ex) {
1053	<	threadUnexpectedException(ex);
1054	<	}
1055	<	}}).start();
1008	<	assertTrue(q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS) == hotPotato);
1009	<	assertTrue(q.isEmpty());
1043	>
1044	>	Thread t = newStartedThread(new CheckedRunnable() {
1045	>	public void realRun() {
1046	>	while (! q.hasWaitingConsumer())
1047	>	Thread.yield();
1048	>	assertTrue(q.hasWaitingConsumer());
1049	>	checkEmpty(q);
1050	>	assertTrue(q.tryTransfer(hotPotato));
1051	>	}});
1052	>
1053	>	assertSame(hotPotato, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
1054	>	checkEmpty(q);
1055	>	awaitTermination(t, MEDIUM_DELAY_MS);
1056		}
1057
1058		/**
#	Line 1016 | Line 1062 | public class LinkedTransferQueueTest ext
1062		public void testTryTransfer4() throws InterruptedException {
1063		final Object hotPotato = new Object();
1064		final LinkedTransferQueue q = new LinkedTransferQueue();
1065	<	new Thread(new Runnable() {
1066	<	public void run() {
1067	<	try {
1068	<	while (! q.hasWaitingConsumer())
1069	<	Thread.yield();
1070	<	threadAssertTrue(q.hasWaitingConsumer());
1071	<	threadAssertTrue(q.isEmpty());
1072	<	threadAssertTrue(q.size() == 0);
1073	<	threadAssertTrue(q.tryTransfer(hotPotato));
1074	<	} catch (Throwable ex) {
1075	<	threadUnexpectedException(ex);
1076	<	}
1077	<	}}).start();
1032	<	assertTrue(q.take() == hotPotato);
1033	<	assertTrue(q.isEmpty());
1065	>
1066	>	Thread t = newStartedThread(new CheckedRunnable() {
1067	>	public void realRun() {
1068	>	while (! q.hasWaitingConsumer())
1069	>	Thread.yield();
1070	>	assertTrue(q.hasWaitingConsumer());
1071	>	checkEmpty(q);
1072	>	assertTrue(q.tryTransfer(hotPotato));
1073	>	}});
1074	>
1075	>	assertSame(q.take(), hotPotato);
1076	>	checkEmpty(q);
1077	>	awaitTermination(t, MEDIUM_DELAY_MS);
1078		}
1079
1080		/**
1081	<	* tryTransfer waits the amount given if interrupted, show an
1082	<	* interrupted exception
1081	>	* tryTransfer waits the amount given, and throws
1082	>	* InterruptedException when interrupted.
1083		*/
1084		public void testTryTransfer5() throws InterruptedException {
1085		final LinkedTransferQueue q = new LinkedTransferQueue();
1086	<	Thread toInterrupt = new Thread(new Runnable() {
1087	<	public void run() {
1086	>	final CountDownLatch threadStarted = new CountDownLatch(1);
1087	>	assertTrue(q.isEmpty());
1088	>
1089	>	Thread t = newStartedThread(new CheckedRunnable() {
1090	>	public void realRun() throws InterruptedException {
1091	>	long t0 = System.nanoTime();
1092	>	threadStarted.countDown();
1093		try {
1094	<	q.tryTransfer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
1095	<	threadShouldThrow();
1096	<	} catch (InterruptedException success) {
1097	<	} catch (Throwable ex) {
1098	<	threadUnexpectedException(ex);
1050	<	}
1094	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
1095	>	shouldThrow();
1096	>	} catch (InterruptedException success) {}
1097	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
1098	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
1099		}});
1100	<	toInterrupt.start();
1101	<	Thread.sleep(SMALL_DELAY_MS);
1102	<	toInterrupt.interrupt();
1100	>
1101	>	threadStarted.await();
1102	>	while (q.isEmpty())
1103	>	Thread.yield();
1104	>	Thread.sleep(SHORT_DELAY_MS);
1105	>	t.interrupt();
1106	>	awaitTermination(t, MEDIUM_DELAY_MS);
1107	>	checkEmpty(q);
1108		}
1109
1110		/**
1111	<	* tryTransfer gives up after the timeout and return false
1111	>	* tryTransfer gives up after the timeout and returns false
1112		*/
1113		public void testTryTransfer6() throws InterruptedException {
1114		final LinkedTransferQueue q = new LinkedTransferQueue();
1115	<	new Thread(new Runnable() {
1116	<	public void run() {
1117	<	try {
1118	<	threadAssertFalse(q.tryTransfer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
1119	<	} catch (Throwable ex) {
1120	<	threadUnexpectedException(ex);
1121	<	}
1122	<	}}).start();
1123	<	Thread.sleep(LONG_DELAY_MS);
1124	<	assertTrue(q.isEmpty());
1115	>
1116	>	Thread t = newStartedThread(new CheckedRunnable() {
1117	>	public void realRun() throws InterruptedException {
1118	>	long t0 = System.nanoTime();
1119	>	assertFalse(q.tryTransfer(new Object(),
1120	>	SHORT_DELAY_MS, MILLISECONDS));
1121	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
1122	>	checkEmpty(q);
1123	>	}});
1124	>
1125	>	awaitTermination(t, MEDIUM_DELAY_MS);
1126	>	checkEmpty(q);
1127		}
1128
1129		/**
#	Line 1078 | Line 1133 | public class LinkedTransferQueueTest ext
1133		public void testTryTransfer7() throws InterruptedException {
1134		final LinkedTransferQueue q = new LinkedTransferQueue();
1135		assertTrue(q.offer(four));
1136	<	new Thread(new Runnable() {
1137	<	public void run() {
1138	<	try {
1139	<	threadAssertTrue(q.tryTransfer(five, LONG_DELAY_MS, TimeUnit.MILLISECONDS));
1140	<	threadAssertTrue(q.isEmpty());
1141	<	} catch (Throwable ex) {
1142	<	threadUnexpectedException(ex);
1143	<	}
1144	<	}}).start();
1090	<	Thread.sleep(SHORT_DELAY_MS);
1136	>
1137	>	Thread t = newStartedThread(new CheckedRunnable() {
1138	>	public void realRun() throws InterruptedException {
1139	>	assertTrue(q.tryTransfer(five, MEDIUM_DELAY_MS, MILLISECONDS));
1140	>	checkEmpty(q);
1141	>	}});
1142	>
1143	>	while (q.size() != 2)
1144	>	Thread.yield();
1145		assertEquals(2, q.size());
1146	<	assertEquals(four, q.poll());
1147	<	assertEquals(five, q.poll());
1148	<	assertTrue(q.isEmpty());
1146	>	assertSame(four, q.poll());
1147	>	assertSame(five, q.poll());
1148	>	checkEmpty(q);
1149	>	awaitTermination(t, MEDIUM_DELAY_MS);
1150		}
1151
1152		/**
1153	<	* tryTransfer attempts to enqueue into the q and fails returning
1154	<	* false not enqueueing and the successive poll is null
1153	>	* tryTransfer attempts to enqueue into the queue and fails
1154	>	* returning false not enqueueing and the successive poll is null
1155		*/
1156		public void testTryTransfer8() throws InterruptedException {
1157		final LinkedTransferQueue q = new LinkedTransferQueue();
1158		assertTrue(q.offer(four));
1159		assertEquals(1, q.size());
1160	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
1160	>	long t0 = System.nanoTime();
1161	>	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
1162	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
1163		assertEquals(1, q.size());
1164	<	assertEquals(four, q.poll());
1108	<	threadAssertTrue(q.isEmpty());
1164	>	assertSame(four, q.poll());
1165		assertNull(q.poll());
1166	+	checkEmpty(q);
1167		}
1168
1169		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1170		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1171	<	assertTrue(q.isEmpty());
1171	>	checkEmpty(q);
1172		for (int i = 0; i < n; i++) {
1173		assertEquals(i, q.size());
1174		assertTrue(q.offer(i));
#	Line 1120 | Line 1177 | public class LinkedTransferQueueTest ext
1177		assertFalse(q.isEmpty());
1178		return q;
1179		}
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	–	}
1180		}

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