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

Comparing jsr166/src/test/tck/LinkedTransferQueueTest.java (file contents):
Revision 1.18 by jsr166, Sat Nov 21 21:00:34 2009 UTC vs.
Revision 1.41 by jsr166, Thu Nov 18 18:49:44 2010 UTC

#	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);
39	>	return newTestSuite(LinkedTransferQueueTest.class,
40	>	new Generic().testSuite());
41		}
42
43	<	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) {}
43	>	void checkEmpty(BlockingQueue q) {
44		try {
45	<	q.remove();
46	<	shouldThrow();
47	<	} catch (NoSuchElementException success) {}
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		/**
#	Line 266 | Line 278 | public class LinkedTransferQueueTest ext
278		}
279
280		/**
281	<	* 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
281	>	* take removes existing elements until empty, then blocks interruptibly
282		*/
283		public void testBlockingTake() throws InterruptedException {
284	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
285	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
286	<	void realRun() throws InterruptedException {
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	<	threadAssertEquals(i, (int) q.take());
289	>	assertEquals(i, (int) q.take());
290		}
291	<	q.take();
291	>	aboutToWait.countDown();
292	>	try {
293	>	q.take();
294	>	shouldThrow();
295	>	} catch (InterruptedException success) {}
296		}});
297	<	Thread.sleep(SMALL_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
#	Line 310 | Line 315 | public class LinkedTransferQueueTest ext
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);
#	Line 322 | Line 327 | public class LinkedTransferQueueTest ext
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		long t0 = System.nanoTime();
336	<	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
337	<	long millisElapsed = (System.nanoTime() - t0)/(1024 * 1024);
333	<	assertTrue(millisElapsed < SMALL_DELAY_MS);
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
#	Line 341 | Line 347 | public class LinkedTransferQueueTest ext
347		* returning timeout status
348		*/
349		public void testInterruptedTimedPoll() throws InterruptedException {
350	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
350	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
351	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
352		Thread t = newStartedThread(new CheckedRunnable() {
353	<	void realRun() throws InterruptedException {
353	>	public void realRun() throws InterruptedException {
354		for (int i = 0; i < SIZE; ++i) {
355		long t0 = System.nanoTime();
356	<	threadAssertEquals(i, (int) q.poll(LONG_DELAY_MS,
357	<	MILLISECONDS));
351	<	long millisElapsed = (System.nanoTime() - t0)/(1024 * 1024);
352	<	assertTrue(millisElapsed < SMALL_DELAY_MS);
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	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
362	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
363		shouldThrow();
364	<	} catch (InterruptedException success) {}
364	>	} catch (InterruptedException success) {
365	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
366	>	}
367		}});
368
369	<	Thread.sleep(SMALL_DELAY_MS);
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 CheckedRunnable() {
383	<	void realRun() throws InterruptedException {
384	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
385	<	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
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(LONG_DELAY_MS, MILLISECONDS);
391	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
392		shouldThrow();
393		} catch (InterruptedException success) {}
394		}});
395
396	<	Thread.sleep(SMALL_DELAY_MS);
397	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
384	<	t.interrupt();
385	<	t.join();
396	>	awaitTermination(t, MEDIUM_DELAY_MS);
397	>	checkEmpty(q);
398		}
399
400		/**
#	Line 456 | Line 468 | public class LinkedTransferQueueTest ext
468		assertTrue(q.remove(one));
469		assertTrue(q.remove(two));
470		assertTrue(q.add(three));
471	<	assertTrue(q.take() == three);
471	>	assertSame(q.take(), three);
472		}
473
474		/**
#	Line 538 | Line 550 | public class LinkedTransferQueueTest ext
550		}
551
552		/**
553	<	* toArray() contains all elements
553	>	* toArray() contains all elements in FIFO order
554		*/
555	<	public void testToArray() throws InterruptedException {
555	>	public void testToArray() {
556		LinkedTransferQueue q = populatedQueue(SIZE);
557		Object[] o = q.toArray();
558		for (int i = 0; i < o.length; i++) {
559	<	assertEquals(o[i], q.take());
559	>	assertSame(o[i], q.poll());
560		}
561		}
562
563		/**
564	<	* toArray(a) contains all elements
564	>	* toArray(a) contains all elements in FIFO order
565		*/
566	<	public void testToArray2() throws InterruptedException {
566	>	public void testToArray2() {
567		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
568		Integer[] ints = new Integer[SIZE];
569	<	ints = q.toArray(ints);
569	>	Integer[] array = q.toArray(ints);
570	>	assertSame(ints, array);
571		for (int i = 0; i < ints.length; i++) {
572	<	assertEquals(ints[i], q.take());
572	>	assertSame(ints[i], q.poll());
573		}
574		}
575
576		/**
577		* toArray(null) throws NullPointerException
578		*/
579	<	public void testToArray_BadArg() {
579	>	public void testToArray_NullArg() {
580	>	LinkedTransferQueue q = populatedQueue(SIZE);
581		try {
582	<	LinkedTransferQueue q = populatedQueue(SIZE);
569	<	Object o[] = q.toArray(null);
582	>	q.toArray(null);
583		shouldThrow();
584		} catch (NullPointerException success) {}
585		}
586
587		/**
588	<	* toArray(incompatible array type) throws CCE
588	>	* toArray(incompatible array type) throws ArrayStoreException
589		*/
590		public void testToArray1_BadArg() {
591	+	LinkedTransferQueue q = populatedQueue(SIZE);
592		try {
593	<	LinkedTransferQueue q = populatedQueue(SIZE);
580	<	Object o[] = q.toArray(new String[10]);
593	>	q.toArray(new String[10]);
594		shouldThrow();
595		} catch (ArrayStoreException success) {}
596		}
#	Line 609 | Line 622 | public class LinkedTransferQueueTest ext
622		it.remove();
623
624		it = q.iterator();
625	<	assertEquals(it.next(), one);
626	<	assertEquals(it.next(), three);
625	>	assertSame(it.next(), one);
626	>	assertSame(it.next(), three);
627		assertFalse(it.hasNext());
628		}
629
#	Line 663 | Line 676 | public class LinkedTransferQueueTest ext
676		*/
677		public void testOfferInExecutor() {
678		final LinkedTransferQueue q = new LinkedTransferQueue();
679	<	q.add(one);
667	<	q.add(two);
679	>	final CountDownLatch threadsStarted = new CountDownLatch(2);
680		ExecutorService executor = Executors.newFixedThreadPool(2);
681
682		executor.execute(new CheckedRunnable() {
683	<	void realRun() {
684	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS,
685	<	MILLISECONDS));
683	>	public void realRun() throws InterruptedException {
684	>	threadsStarted.countDown();
685	>	threadsStarted.await();
686	>	assertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
687		}});
688
689		executor.execute(new CheckedRunnable() {
690	<	void realRun() throws InterruptedException {
691	<	Thread.sleep(SMALL_DELAY_MS);
692	<	threadAssertEquals(one, q.take());
690	>	public void realRun() throws InterruptedException {
691	>	threadsStarted.countDown();
692	>	threadsStarted.await();
693	>	assertSame(one, q.take());
694	>	checkEmpty(q);
695		}});
696
697		joinPool(executor);
#	Line 687 | Line 702 | public class LinkedTransferQueueTest ext
702		*/
703		public void testPollInExecutor() {
704		final LinkedTransferQueue q = new LinkedTransferQueue();
705	+	final CountDownLatch threadsStarted = new CountDownLatch(2);
706		ExecutorService executor = Executors.newFixedThreadPool(2);
707
708		executor.execute(new CheckedRunnable() {
709	<	void realRun() throws InterruptedException {
710	<	threadAssertNull(q.poll());
711	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS,
712	<	MILLISECONDS));
713	<	threadAssertTrue(q.isEmpty());
709	>	public void realRun() throws InterruptedException {
710	>	assertNull(q.poll());
711	>	threadsStarted.countDown();
712	>	threadsStarted.await();
713	>	assertSame(one, q.poll(SMALL_DELAY_MS, MILLISECONDS));
714	>	checkEmpty(q);
715		}});
716
717		executor.execute(new CheckedRunnable() {
718	<	void realRun() throws InterruptedException {
719	<	Thread.sleep(SMALL_DELAY_MS);
718	>	public void realRun() throws InterruptedException {
719	>	threadsStarted.countDown();
720	>	threadsStarted.await();
721		q.put(one);
722		}});
723
#	Line 725 | Line 743 | public class LinkedTransferQueueTest ext
743		LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
744
745		assertEquals(q.size(), r.size());
746	+	assertEquals(q.toString(), r.toString());
747	+	assertTrue(Arrays.equals(q.toArray(), r.toArray()));
748		while (!q.isEmpty()) {
749		assertEquals(q.remove(), r.remove());
750		}
#	Line 784 | Line 804 | public class LinkedTransferQueueTest ext
804		public void testDrainToWithActivePut() throws InterruptedException {
805		final LinkedTransferQueue q = populatedQueue(SIZE);
806		Thread t = newStartedThread(new CheckedRunnable() {
807	<	void realRun() {
807	>	public void realRun() {
808		q.put(SIZE + 1);
809		}});
810		ArrayList l = new ArrayList();
#	Line 793 | Line 813 | public class LinkedTransferQueueTest ext
813		for (int i = 0; i < SIZE; ++i) {
814		assertEquals(l.get(i), i);
815		}
816	<	t.join();
816	>	awaitTermination(t, MEDIUM_DELAY_MS);
817		assertTrue(q.size() + l.size() >= SIZE);
818		}
819
#	Line 820 | Line 840 | public class LinkedTransferQueueTest ext
840		}
841
842		/**
843	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
843	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
844		*/
845		public void testDrainToN() {
846		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 849 | Line 869 | public class LinkedTransferQueueTest ext
869		final LinkedTransferQueue q = new LinkedTransferQueue();
870		assertEquals(q.getWaitingConsumerCount(), 0);
871		assertFalse(q.hasWaitingConsumer());
872	+	final CountDownLatch threadStarted = new CountDownLatch(1);
873
874		Thread t = newStartedThread(new CheckedRunnable() {
875	<	void realRun() throws InterruptedException {
876	<	Thread.sleep(SMALL_DELAY_MS);
877	<	threadAssertTrue(q.hasWaitingConsumer());
878	<	threadAssertEquals(q.getWaitingConsumerCount(), 1);
879	<	threadAssertTrue(q.offer(new Object()));
859	<	threadAssertFalse(q.hasWaitingConsumer());
860	<	threadAssertEquals(q.getWaitingConsumerCount(), 0);
875	>	public void realRun() throws InterruptedException {
876	>	threadStarted.countDown();
877	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
878	>	assertEquals(q.getWaitingConsumerCount(), 0);
879	>	assertFalse(q.hasWaitingConsumer());
880		}});
881
882	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) != null);
882	>	threadStarted.await();
883	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
884	>	assertEquals(q.getWaitingConsumerCount(), 1);
885	>	assertTrue(q.hasWaitingConsumer());
886	>
887	>	assertTrue(q.offer(one));
888		assertEquals(q.getWaitingConsumerCount(), 0);
889		assertFalse(q.hasWaitingConsumer());
890	<	t.join();
890	>
891	>	awaitTermination(t, MEDIUM_DELAY_MS);
892		}
893
894		/**
#	Line 884 | Line 909 | public class LinkedTransferQueueTest ext
909		public void testTransfer2() throws InterruptedException {
910		final LinkedTransferQueue<Integer> q
911		= new LinkedTransferQueue<Integer>();
912	+	final CountDownLatch threadStarted = new CountDownLatch(1);
913
914		Thread t = newStartedThread(new CheckedRunnable() {
915	<	void realRun() throws InterruptedException {
916	<	q.transfer(SIZE);
917	<	threadAssertTrue(q.isEmpty());
915	>	public void realRun() throws InterruptedException {
916	>	threadStarted.countDown();
917	>	q.transfer(five);
918	>	checkEmpty(q);
919		}});
920
921	<	Thread.sleep(SHORT_DELAY_MS);
921	>	threadStarted.await();
922	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
923		assertEquals(1, q.size());
924	<	assertEquals(SIZE, (int) q.poll());
925	<	assertTrue(q.isEmpty());
926	<	t.join();
924	>	assertSame(five, q.poll());
925	>	checkEmpty(q);
926	>	awaitTermination(t, MEDIUM_DELAY_MS);
927		}
928
929		/**
#	Line 906 | Line 934 | public class LinkedTransferQueueTest ext
934		= new LinkedTransferQueue<Integer>();
935
936		Thread first = newStartedThread(new CheckedRunnable() {
937	<	void realRun() throws InterruptedException {
938	<	Integer i = SIZE + 1;
939	<	q.transfer(i);
940	<	threadAssertTrue(!q.contains(i));
913	<	threadAssertEquals(1, q.size());
937	>	public void realRun() throws InterruptedException {
938	>	q.transfer(four);
939	>	assertTrue(!q.contains(four));
940	>	assertEquals(1, q.size());
941		}});
942
943		Thread interruptedThread = newStartedThread(
944		new CheckedInterruptedRunnable() {
945	<	void realRun() throws InterruptedException {
946	<	while (q.size() == 0)
945	>	public void realRun() throws InterruptedException {
946	>	while (q.isEmpty())
947		Thread.yield();
948	<	q.transfer(SIZE);
948	>	q.transfer(five);
949		}});
950
951		while (q.size() < 2)
952		Thread.yield();
953		assertEquals(2, q.size());
954	<	assertEquals(SIZE + 1, (int) q.poll());
954	>	assertSame(four, q.poll());
955		first.join();
956		assertEquals(1, q.size());
957		interruptedThread.interrupt();
958		interruptedThread.join();
959	<	assertEquals(0, q.size());
933	<	assertTrue(q.isEmpty());
959	>	checkEmpty(q);
960		}
961
962		/**
#	Line 941 | Line 967 | public class LinkedTransferQueueTest ext
967		final LinkedTransferQueue q = new LinkedTransferQueue();
968
969		Thread t = newStartedThread(new CheckedRunnable() {
970	<	void realRun() throws InterruptedException {
970	>	public void realRun() throws InterruptedException {
971		q.transfer(four);
972	<	threadAssertFalse(q.contains(four));
973	<	threadAssertEquals(three, q.poll());
972	>	assertFalse(q.contains(four));
973	>	assertSame(three, q.poll());
974		}});
975
976	<	Thread.sleep(SHORT_DELAY_MS);
976	>	while (q.isEmpty())
977	>	Thread.yield();
978	>	assertFalse(q.isEmpty());
979	>	assertEquals(1, q.size());
980		assertTrue(q.offer(three));
981	<	assertEquals(four, q.poll());
982	<	t.join();
981	>	assertSame(four, q.poll());
982	>	awaitTermination(t, MEDIUM_DELAY_MS);
983		}
984
985		/**
#	Line 962 | Line 991 | public class LinkedTransferQueueTest ext
991		= new LinkedTransferQueue<Integer>();
992
993		Thread t = newStartedThread(new CheckedRunnable() {
994	<	void realRun() throws InterruptedException {
995	<	q.transfer(SIZE);
994	>	public void realRun() throws InterruptedException {
995	>	q.transfer(four);
996		checkEmpty(q);
997		}});
998
999	<	Thread.sleep(SHORT_DELAY_MS);
1000	<	assertEquals(SIZE, (int) q.take());
999	>	while (q.isEmpty())
1000	>	Thread.yield();
1001	>	assertFalse(q.isEmpty());
1002	>	assertEquals(1, q.size());
1003	>	assertSame(four, q.take());
1004		checkEmpty(q);
1005	<	t.join();
1005	>	awaitTermination(t, MEDIUM_DELAY_MS);
1006		}
1007
1008		/**
#	Line 1004 | Line 1036 | public class LinkedTransferQueueTest ext
1036		final LinkedTransferQueue q = new LinkedTransferQueue();
1037
1038		Thread t = newStartedThread(new CheckedRunnable() {
1039	<	void realRun() {
1039	>	public void realRun() {
1040		while (! q.hasWaitingConsumer())
1041		Thread.yield();
1042	<	threadAssertTrue(q.hasWaitingConsumer());
1043	<	threadAssertTrue(q.isEmpty());
1044	<	threadAssertTrue(q.size() == 0);
1013	<	threadAssertTrue(q.tryTransfer(hotPotato));
1042	>	assertTrue(q.hasWaitingConsumer());
1043	>	checkEmpty(q);
1044	>	assertTrue(q.tryTransfer(hotPotato));
1045		}});
1046
1047	<	assertTrue(q.poll(MEDIUM_DELAY_MS, MILLISECONDS) == hotPotato);
1047	>	assertSame(hotPotato, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
1048		checkEmpty(q);
1049	<	t.join();
1049	>	awaitTermination(t, MEDIUM_DELAY_MS);
1050		}
1051
1052		/**
#	Line 1027 | Line 1058 | public class LinkedTransferQueueTest ext
1058		final LinkedTransferQueue q = new LinkedTransferQueue();
1059
1060		Thread t = newStartedThread(new CheckedRunnable() {
1061	<	void realRun() {
1061	>	public void realRun() {
1062		while (! q.hasWaitingConsumer())
1063		Thread.yield();
1064	<	threadAssertTrue(q.hasWaitingConsumer());
1065	<	threadAssertTrue(q.isEmpty());
1066	<	threadAssertTrue(q.size() == 0);
1036	<	threadAssertTrue(q.tryTransfer(hotPotato));
1064	>	assertTrue(q.hasWaitingConsumer());
1065	>	checkEmpty(q);
1066	>	assertTrue(q.tryTransfer(hotPotato));
1067		}});
1068
1069	<	assertTrue(q.take() == hotPotato);
1069	>	assertSame(q.take(), hotPotato);
1070		checkEmpty(q);
1071	<	t.join();
1071	>	awaitTermination(t, MEDIUM_DELAY_MS);
1072		}
1073
1074		/**
1075	<	* tryTransfer waits the amount given if interrupted, and
1076	<	* throws interrupted exception
1075	>	* tryTransfer waits the amount given, and throws
1076	>	* InterruptedException when interrupted.
1077		*/
1078		public void testTryTransfer5() throws InterruptedException {
1079		final LinkedTransferQueue q = new LinkedTransferQueue();
1080	+	final CountDownLatch threadStarted = new CountDownLatch(1);
1081	+	assertTrue(q.isEmpty());
1082
1083	<	Thread toInterrupt = newStartedThread(new CheckedInterruptedRunnable() {
1084	<	void realRun() throws InterruptedException {
1085	<	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
1083	>	Thread t = newStartedThread(new CheckedRunnable() {
1084	>	public void realRun() throws InterruptedException {
1085	>	long t0 = System.nanoTime();
1086	>	threadStarted.countDown();
1087	>	try {
1088	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
1089	>	shouldThrow();
1090	>	} catch (InterruptedException success) {}
1091	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
1092	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
1093		}});
1094
1095	<	Thread.sleep(SMALL_DELAY_MS);
1096	<	toInterrupt.interrupt();
1097	<	toInterrupt.join();
1095	>	threadStarted.await();
1096	>	while (q.isEmpty())
1097	>	Thread.yield();
1098	>	Thread.sleep(SHORT_DELAY_MS);
1099	>	t.interrupt();
1100	>	awaitTermination(t, MEDIUM_DELAY_MS);
1101	>	checkEmpty(q);
1102		}
1103
1104		/**
1105	<	* tryTransfer gives up after the timeout and return false
1105	>	* tryTransfer gives up after the timeout and returns false
1106		*/
1107		public void testTryTransfer6() throws InterruptedException {
1108		final LinkedTransferQueue q = new LinkedTransferQueue();
1109
1110		Thread t = newStartedThread(new CheckedRunnable() {
1111	<	void realRun() throws InterruptedException {
1112	<	threadAssertFalse
1113	<	(q.tryTransfer(new Object(),
1114	<	SHORT_DELAY_MS, MILLISECONDS));
1111	>	public void realRun() throws InterruptedException {
1112	>	long t0 = System.nanoTime();
1113	>	assertFalse(q.tryTransfer(new Object(),
1114	>	SHORT_DELAY_MS, MILLISECONDS));
1115	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
1116	>	checkEmpty(q);
1117		}});
1118
1119	<	Thread.sleep(SMALL_DELAY_MS);
1119	>	awaitTermination(t, MEDIUM_DELAY_MS);
1120		checkEmpty(q);
1076	–	t.join();
1121		}
1122
1123		/**
#	Line 1085 | Line 1129 | public class LinkedTransferQueueTest ext
1129		assertTrue(q.offer(four));
1130
1131		Thread t = newStartedThread(new CheckedRunnable() {
1132	<	void realRun() throws InterruptedException {
1133	<	threadAssertTrue(q.tryTransfer(five,
1134	<	MEDIUM_DELAY_MS, MILLISECONDS));
1091	<	threadAssertTrue(q.isEmpty());
1132	>	public void realRun() throws InterruptedException {
1133	>	assertTrue(q.tryTransfer(five, MEDIUM_DELAY_MS, MILLISECONDS));
1134	>	checkEmpty(q);
1135		}});
1136
1137	<	Thread.sleep(SHORT_DELAY_MS);
1137	>	while (q.size() != 2)
1138	>	Thread.yield();
1139		assertEquals(2, q.size());
1140	<	assertEquals(four, q.poll());
1141	<	assertEquals(five, q.poll());
1140	>	assertSame(four, q.poll());
1141	>	assertSame(five, q.poll());
1142		checkEmpty(q);
1143	<	t.join();
1143	>	awaitTermination(t, MEDIUM_DELAY_MS);
1144		}
1145
1146		/**
1147	<	* tryTransfer attempts to enqueue into the q and fails returning
1148	<	* false not enqueueing and the successive poll is null
1147	>	* tryTransfer attempts to enqueue into the queue and fails
1148	>	* returning false not enqueueing and the successive poll is null
1149		*/
1150		public void testTryTransfer8() throws InterruptedException {
1151		final LinkedTransferQueue q = new LinkedTransferQueue();
1152		assertTrue(q.offer(four));
1153		assertEquals(1, q.size());
1154	+	long t0 = System.nanoTime();
1155		assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
1156	+	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
1157		assertEquals(1, q.size());
1158	<	assertEquals(four, q.poll());
1158	>	assertSame(four, q.poll());
1159		assertNull(q.poll());
1160		checkEmpty(q);
1161		}
1162
1163		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1164		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1165	<	assertTrue(q.isEmpty());
1165	>	checkEmpty(q);
1166		for (int i = 0; i < n; i++) {
1167		assertEquals(i, q.size());
1168		assertTrue(q.offer(i));

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