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Comparing jsr166/src/test/tck/LinkedTransferQueueTest.java (file contents):
Revision 1.18 by jsr166, Sat Nov 21 21:00:34 2009 UTC vs.
Revision 1.45 by dl, Fri May 6 16:43:45 2011 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
#	Line 18 | Line 18 | 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);
40	<	}
34	<
35	<	void checkEmpty(LinkedTransferQueue q) throws InterruptedException {
36	<	assertTrue(q.isEmpty());
37	<	assertEquals(0, q.size());
38	<	assertNull(q.peek());
39	<	assertNull(q.poll());
40	<	assertNull(q.poll(0, MILLISECONDS));
41	<	assertEquals(q.toString(), "[]");
42	<	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
43	<	assertFalse(q.iterator().hasNext());
44	<	try {
45	<	q.element();
46	<	shouldThrow();
47	<	} catch (NoSuchElementException success) {}
48	<	try {
49	<	q.iterator().next();
50	<	shouldThrow();
51	<	} catch (NoSuchElementException success) {}
52	<	try {
53	<	q.remove();
54	<	shouldThrow();
55	<	} catch (NoSuchElementException success) {}
39	>	return newTestSuite(LinkedTransferQueueTest.class,
40	>	new Generic().testSuite());
41		}
42
43		/**
#	Line 266 | Line 251 | public class LinkedTransferQueueTest ext
251		}
252
253		/**
254	<	* take blocks interruptibly when empty
270	<	*/
271	<	public void testTakeFromEmpty() throws InterruptedException {
272	<	final LinkedTransferQueue q = new LinkedTransferQueue();
273	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
274	<	void realRun() throws InterruptedException {
275	<	q.take();
276	<	}});
277	<	Thread.sleep(SHORT_DELAY_MS);
278	<	t.interrupt();
279	<	t.join();
280	<	}
281	<
282	<	/**
283	<	* 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	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
258	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
259	<	void realRun() throws InterruptedException {
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	<	threadAssertEquals(i, (int) q.take());
262	>	assertEquals(i, (int) q.take());
263		}
264	<	q.take();
264	>	aboutToWait.countDown();
265	>	try {
266	>	q.take();
267	>	shouldThrow();
268	>	} catch (InterruptedException success) {}
269		}});
270	<	Thread.sleep(SMALL_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
#	Line 310 | Line 288 | public class LinkedTransferQueueTest ext
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);
#	Line 322 | Line 300 | public class LinkedTransferQueueTest ext
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		long t0 = System.nanoTime();
309	<	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
310	<	long millisElapsed = (System.nanoTime() - t0)/(1024 * 1024);
333	<	assertTrue(millisElapsed < SMALL_DELAY_MS);
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
#	Line 341 | Line 320 | public class LinkedTransferQueueTest ext
320		* returning timeout status
321		*/
322		public void testInterruptedTimedPoll() throws InterruptedException {
323	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
323	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
324	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
325		Thread t = newStartedThread(new CheckedRunnable() {
326	<	void realRun() throws InterruptedException {
326	>	public void realRun() throws InterruptedException {
327		for (int i = 0; i < SIZE; ++i) {
328		long t0 = System.nanoTime();
329	<	threadAssertEquals(i, (int) q.poll(LONG_DELAY_MS,
330	<	MILLISECONDS));
351	<	long millisElapsed = (System.nanoTime() - t0)/(1024 * 1024);
352	<	assertTrue(millisElapsed < SMALL_DELAY_MS);
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	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
335	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
336		shouldThrow();
337	<	} catch (InterruptedException success) {}
337	>	} catch (InterruptedException success) {
338	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
339	>	}
340		}});
341
342	<	Thread.sleep(SMALL_DELAY_MS);
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 CheckedRunnable() {
356	<	void realRun() throws InterruptedException {
357	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
358	<	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
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(LONG_DELAY_MS, MILLISECONDS);
364	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
365		shouldThrow();
366		} catch (InterruptedException success) {}
367		}});
368
369	<	Thread.sleep(SMALL_DELAY_MS);
370	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
384	<	t.interrupt();
385	<	t.join();
369	>	awaitTermination(t, MEDIUM_DELAY_MS);
370	>	checkEmpty(q);
371		}
372
373		/**
#	Line 436 | Line 421 | public class LinkedTransferQueueTest ext
421		*/
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		checkEmpty(q);
438		}
#	Line 456 | 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() == three);
450	>	assertSame(q.take(), three);
451		}
452
453		/**
#	Line 538 | 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);
569	<	Object o[] = q.toArray(null);
561	>	q.toArray(null);
562		shouldThrow();
563		} catch (NullPointerException success) {}
564		}
565
566		/**
567	<	* toArray(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);
580	<	Object o[] = q.toArray(new String[10]);
572	>	q.toArray(new String[10]);
573		shouldThrow();
574		} catch (ArrayStoreException success) {}
575		}
#	Line 609 | 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 663 | Line 655 | public class LinkedTransferQueueTest ext
655		*/
656		public void testOfferInExecutor() {
657		final LinkedTransferQueue q = new LinkedTransferQueue();
658	<	q.add(one);
667	<	q.add(two);
658	>	final CountDownLatch threadsStarted = new CountDownLatch(2);
659		ExecutorService executor = Executors.newFixedThreadPool(2);
660
661		executor.execute(new CheckedRunnable() {
662	<	void realRun() {
663	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS,
664	<	MILLISECONDS));
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 CheckedRunnable() {
669	<	void realRun() throws InterruptedException {
670	<	Thread.sleep(SMALL_DELAY_MS);
671	<	threadAssertEquals(one, q.take());
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);
#	Line 687 | Line 681 | public class LinkedTransferQueueTest ext
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
687		executor.execute(new CheckedRunnable() {
688	<	void realRun() throws InterruptedException {
689	<	threadAssertNull(q.poll());
690	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS,
691	<	MILLISECONDS));
692	<	threadAssertTrue(q.isEmpty());
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 CheckedRunnable() {
697	<	void realRun() throws InterruptedException {
698	<	Thread.sleep(SMALL_DELAY_MS);
697	>	public void realRun() throws InterruptedException {
698	>	threadsStarted.countDown();
699	>	threadsStarted.await();
700		q.put(one);
701		}});
702
#	Line 725 | Line 722 | public class LinkedTransferQueueTest ext
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 784 | Line 783 | public class LinkedTransferQueueTest ext
783		public void testDrainToWithActivePut() throws InterruptedException {
784		final LinkedTransferQueue q = populatedQueue(SIZE);
785		Thread t = newStartedThread(new CheckedRunnable() {
786	<	void realRun() {
786	>	public void realRun() {
787		q.put(SIZE + 1);
788		}});
789		ArrayList l = new ArrayList();
#	Line 793 | Line 792 | public class LinkedTransferQueueTest ext
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 820 | Line 819 | public class LinkedTransferQueueTest ext
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 849 | Line 848 | public class LinkedTransferQueueTest ext
848		final LinkedTransferQueue q = new LinkedTransferQueue();
849		assertEquals(q.getWaitingConsumerCount(), 0);
850		assertFalse(q.hasWaitingConsumer());
851	+	final CountDownLatch threadStarted = new CountDownLatch(1);
852
853		Thread t = newStartedThread(new CheckedRunnable() {
854	<	void realRun() throws InterruptedException {
855	<	Thread.sleep(SMALL_DELAY_MS);
856	<	threadAssertTrue(q.hasWaitingConsumer());
857	<	threadAssertEquals(q.getWaitingConsumerCount(), 1);
858	<	threadAssertTrue(q.offer(new Object()));
859	<	threadAssertFalse(q.hasWaitingConsumer());
860	<	threadAssertEquals(q.getWaitingConsumerCount(), 0);
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	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) != null);
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	<	t.join();
869	>
870	>	awaitTermination(t, MEDIUM_DELAY_MS);
871		}
872
873		/**
#	Line 884 | Line 888 | public class LinkedTransferQueueTest ext
888		public void testTransfer2() throws InterruptedException {
889		final LinkedTransferQueue<Integer> q
890		= new LinkedTransferQueue<Integer>();
891	+	final CountDownLatch threadStarted = new CountDownLatch(1);
892
893		Thread t = newStartedThread(new CheckedRunnable() {
894	<	void realRun() throws InterruptedException {
895	<	q.transfer(SIZE);
896	<	threadAssertTrue(q.isEmpty());
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());
905	<	t.join();
903	>	assertSame(five, q.poll());
904	>	checkEmpty(q);
905	>	awaitTermination(t, MEDIUM_DELAY_MS);
906		}
907
908		/**
#	Line 906 | Line 913 | public class LinkedTransferQueueTest ext
913		= new LinkedTransferQueue<Integer>();
914
915		Thread first = newStartedThread(new CheckedRunnable() {
916	<	void realRun() throws InterruptedException {
917	<	Integer i = SIZE + 1;
918	<	q.transfer(i);
919	<	threadAssertTrue(!q.contains(i));
913	<	threadAssertEquals(1, q.size());
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 = newStartedThread(
923		new CheckedInterruptedRunnable() {
924	<	void realRun() throws InterruptedException {
925	<	while (q.size() == 0)
924	>	public void realRun() throws InterruptedException {
925	>	while (q.isEmpty())
926		Thread.yield();
927	<	q.transfer(SIZE);
927	>	q.transfer(five);
928		}});
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());
933	<	assertTrue(q.isEmpty());
938	>	checkEmpty(q);
939		}
940
941		/**
#	Line 941 | Line 946 | public class LinkedTransferQueueTest ext
946		final LinkedTransferQueue q = new LinkedTransferQueue();
947
948		Thread t = newStartedThread(new CheckedRunnable() {
949	<	void realRun() throws InterruptedException {
949	>	public void realRun() throws InterruptedException {
950		q.transfer(four);
951	<	threadAssertFalse(q.contains(four));
952	<	threadAssertEquals(three, q.poll());
951	>	assertFalse(q.contains(four));
952	>	assertSame(three, q.poll());
953		}});
954
955	<	Thread.sleep(SHORT_DELAY_MS);
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());
961	<	t.join();
960	>	assertSame(four, q.poll());
961	>	awaitTermination(t, MEDIUM_DELAY_MS);
962		}
963
964		/**
#	Line 962 | Line 970 | public class LinkedTransferQueueTest ext
970		= new LinkedTransferQueue<Integer>();
971
972		Thread t = newStartedThread(new CheckedRunnable() {
973	<	void realRun() throws InterruptedException {
974	<	q.transfer(SIZE);
973	>	public void realRun() throws InterruptedException {
974	>	q.transfer(four);
975		checkEmpty(q);
976		}});
977
978	<	Thread.sleep(SHORT_DELAY_MS);
979	<	assertEquals(SIZE, (int) q.take());
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	<	t.join();
984	>	awaitTermination(t, MEDIUM_DELAY_MS);
985		}
986
987		/**
#	Line 1004 | Line 1015 | public class LinkedTransferQueueTest ext
1015		final LinkedTransferQueue q = new LinkedTransferQueue();
1016
1017		Thread t = newStartedThread(new CheckedRunnable() {
1018	<	void realRun() {
1018	>	public void realRun() {
1019		while (! q.hasWaitingConsumer())
1020		Thread.yield();
1021	<	threadAssertTrue(q.hasWaitingConsumer());
1022	<	threadAssertTrue(q.isEmpty());
1023	<	threadAssertTrue(q.size() == 0);
1013	<	threadAssertTrue(q.tryTransfer(hotPotato));
1021	>	assertTrue(q.hasWaitingConsumer());
1022	>	checkEmpty(q);
1023	>	assertTrue(q.tryTransfer(hotPotato));
1024		}});
1025
1026	<	assertTrue(q.poll(MEDIUM_DELAY_MS, MILLISECONDS) == hotPotato);
1026	>	assertSame(hotPotato, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
1027		checkEmpty(q);
1028	<	t.join();
1028	>	awaitTermination(t, MEDIUM_DELAY_MS);
1029		}
1030
1031		/**
#	Line 1027 | Line 1037 | public class LinkedTransferQueueTest ext
1037		final LinkedTransferQueue q = new LinkedTransferQueue();
1038
1039		Thread t = newStartedThread(new CheckedRunnable() {
1040	<	void realRun() {
1040	>	public void realRun() {
1041		while (! q.hasWaitingConsumer())
1042		Thread.yield();
1043	<	threadAssertTrue(q.hasWaitingConsumer());
1044	<	threadAssertTrue(q.isEmpty());
1045	<	threadAssertTrue(q.size() == 0);
1036	<	threadAssertTrue(q.tryTransfer(hotPotato));
1043	>	assertTrue(q.hasWaitingConsumer());
1044	>	checkEmpty(q);
1045	>	assertTrue(q.tryTransfer(hotPotato));
1046		}});
1047
1048	<	assertTrue(q.take() == hotPotato);
1048	>	assertSame(q.take(), hotPotato);
1049		checkEmpty(q);
1050	<	t.join();
1050	>	awaitTermination(t, MEDIUM_DELAY_MS);
1051		}
1052
1053		/**
1054	<	* tryTransfer waits the amount given if interrupted, and
1055	<	* throws 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	+	final CountDownLatch threadStarted = new CountDownLatch(1);
1060	+	assertTrue(q.isEmpty());
1061
1062	<	Thread toInterrupt = newStartedThread(new CheckedInterruptedRunnable() {
1063	<	void realRun() throws InterruptedException {
1064	<	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
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, MILLISECONDS);
1068	>	shouldThrow();
1069	>	} catch (InterruptedException success) {}
1070	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
1071	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
1072		}});
1073
1074	<	Thread.sleep(SMALL_DELAY_MS);
1075	<	toInterrupt.interrupt();
1076	<	toInterrupt.join();
1074	>	threadStarted.await();
1075	>	while (q.isEmpty())
1076	>	Thread.yield();
1077	>	delay(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
1089		Thread t = newStartedThread(new CheckedRunnable() {
1090	<	void realRun() throws InterruptedException {
1091	<	threadAssertFalse
1092	<	(q.tryTransfer(new Object(),
1093	<	SHORT_DELAY_MS, MILLISECONDS));
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	<	Thread.sleep(SMALL_DELAY_MS);
1098	>	awaitTermination(t, MEDIUM_DELAY_MS);
1099		checkEmpty(q);
1076	–	t.join();
1100		}
1101
1102		/**
#	Line 1085 | Line 1108 | public class LinkedTransferQueueTest ext
1108		assertTrue(q.offer(four));
1109
1110		Thread t = newStartedThread(new CheckedRunnable() {
1111	<	void realRun() throws InterruptedException {
1112	<	threadAssertTrue(q.tryTransfer(five,
1113	<	MEDIUM_DELAY_MS, MILLISECONDS));
1091	<	threadAssertTrue(q.isEmpty());
1111	>	public void realRun() throws InterruptedException {
1112	>	assertTrue(q.tryTransfer(five, MEDIUM_DELAY_MS, MILLISECONDS));
1113	>	checkEmpty(q);
1114		}});
1115
1116	<	Thread.sleep(SHORT_DELAY_MS);
1116	>	while (q.size() != 2)
1117	>	Thread.yield();
1118		assertEquals(2, q.size());
1119	<	assertEquals(four, q.poll());
1120	<	assertEquals(five, q.poll());
1119	>	assertSame(four, q.poll());
1120	>	assertSame(five, q.poll());
1121		checkEmpty(q);
1122	<	t.join();
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	+	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());
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));

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