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

Comparing jsr166/src/test/tck/LinkedTransferQueueTest.java (file contents):
Revision 1.53 by jsr166, Sun Nov 23 22:27:06 2014 UTC vs.
Revision 1.77 by jsr166, Sun May 14 00:56:43 2017 UTC

#	Line 5 | Line 5
5		* Other contributors include John Vint
6		*/
7
8	<	import junit.framework.*;
9	<	import java.util.Arrays;
8	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
9	>
10		import java.util.ArrayList;
11	+	import java.util.Arrays;
12		import java.util.Collection;
13		import java.util.Iterator;
14		import java.util.List;
15		import java.util.NoSuchElementException;
16		import java.util.Queue;
17		import java.util.concurrent.BlockingQueue;
18	+	import java.util.concurrent.Callable;
19		import java.util.concurrent.CountDownLatch;
20		import java.util.concurrent.Executors;
21		import java.util.concurrent.ExecutorService;
22		import java.util.concurrent.LinkedTransferQueue;
23	<	import static java.util.concurrent.TimeUnit.MILLISECONDS;
24	<	import static java.util.concurrent.TimeUnit.NANOSECONDS;
23	>
24	>	import junit.framework.Test;
25
26		@SuppressWarnings({"unchecked", "rawtypes"})
27		public class LinkedTransferQueueTest extends JSR166TestCase {
26	–
28		public static class Generic extends BlockingQueueTest {
29		protected BlockingQueue emptyCollection() {
30		return new LinkedTransferQueue();
#	Line 31 | Line 32 | public class LinkedTransferQueueTest ext
32		}
33
34		public static void main(String[] args) {
35	<	junit.textui.TestRunner.run(suite());
35	>	main(suite(), args);
36		}
37
38		public static Test suite() {
39	+	class Implementation implements CollectionImplementation {
40	+	public Class<?> klazz() { return LinkedTransferQueue.class; }
41	+	public Collection emptyCollection() { return new LinkedTransferQueue(); }
42	+	public Object makeElement(int i) { return i; }
43	+	public boolean isConcurrent() { return true; }
44	+	public boolean permitsNulls() { return false; }
45	+	}
46		return newTestSuite(LinkedTransferQueueTest.class,
47	<	new Generic().testSuite());
47	>	new Generic().testSuite(),
48	>	CollectionTest.testSuite(new Implementation()));
49		}
50
51		/**
#	Line 77 | Line 86 | public class LinkedTransferQueueTest ext
86		*/
87		public void testConstructor4() {
88		Integer[] ints = new Integer[SIZE];
89	<	for (int i = 0; i < SIZE-1; ++i)
89	>	for (int i = 0; i < SIZE - 1; ++i)
90		ints[i] = i;
91		Collection<Integer> elements = Arrays.asList(ints);
92		try {
#	Line 114 | Line 123 | public class LinkedTransferQueueTest ext
123		* remainingCapacity() always returns Integer.MAX_VALUE
124		*/
125		public void testRemainingCapacity() {
126	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
126	>	BlockingQueue q = populatedQueue(SIZE);
127		for (int i = 0; i < SIZE; ++i) {
128		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
129		assertEquals(SIZE - i, q.size());
130	<	q.remove();
130	>	assertEquals(i, q.remove());
131		}
132		for (int i = 0; i < SIZE; ++i) {
133		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
134		assertEquals(i, q.size());
135	<	q.add(i);
135	>	assertTrue(q.add(i));
136		}
137		}
138
#	Line 131 | Line 140 | public class LinkedTransferQueueTest ext
140		* addAll(this) throws IllegalArgumentException
141		*/
142		public void testAddAllSelf() {
143	+	LinkedTransferQueue q = populatedQueue(SIZE);
144		try {
135	–	LinkedTransferQueue q = populatedQueue(SIZE);
145		q.addAll(q);
146		shouldThrow();
147		} catch (IllegalArgumentException success) {}
#	Line 143 | Line 152 | public class LinkedTransferQueueTest ext
152		* NullPointerException after possibly adding some elements
153		*/
154		public void testAddAll3() {
155	+	LinkedTransferQueue q = new LinkedTransferQueue();
156	+	Integer[] ints = new Integer[SIZE];
157	+	for (int i = 0; i < SIZE - 1; ++i)
158	+	ints[i] = i;
159		try {
147	–	LinkedTransferQueue q = new LinkedTransferQueue();
148	–	Integer[] ints = new Integer[SIZE];
149	–	for (int i = 0; i < SIZE - 1; ++i) {
150	–	ints[i] = i;
151	–	}
160		q.addAll(Arrays.asList(ints));
161		shouldThrow();
162		} catch (NullPointerException success) {}
#	Line 175 | Line 183 | public class LinkedTransferQueueTest ext
183		* all elements successfully put are contained
184		*/
185		public void testPut() {
186	<	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
186	>	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
187		for (int i = 0; i < SIZE; ++i) {
188		assertEquals(i, q.size());
189		q.put(i);
#	Line 201 | Line 209 | public class LinkedTransferQueueTest ext
209		final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
210		Thread t = newStartedThread(new CheckedRunnable() {
211		public void realRun() throws InterruptedException {
212	<	for (int i = 0; i < SIZE; ++i) {
205	<	assertEquals(i, q.take());
206	<	}
212	>	for (int i = 0; i < SIZE; i++) assertEquals(i, q.take());
213
214		Thread.currentThread().interrupt();
215		try {
#	Line 221 | Line 227 | public class LinkedTransferQueueTest ext
227		}});
228
229		await(pleaseInterrupt);
230	<	assertThreadStaysAlive(t);
230	>	assertThreadBlocks(t, Thread.State.WAITING);
231		t.interrupt();
232		awaitTermination(t);
233		}
#	Line 255 | Line 261 | public class LinkedTransferQueueTest ext
261		*/
262		public void testTimedPoll() throws InterruptedException {
263		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
258	–	for (int i = 0; i < SIZE; ++i) {
259	–	long startTime = System.nanoTime();
260	–	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
261	–	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
262	–	}
264		long startTime = System.nanoTime();
265	+	for (int i = 0; i < SIZE; ++i)
266	+	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
267	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
268	+
269	+	startTime = System.nanoTime();
270		assertNull(q.poll(timeoutMillis(), MILLISECONDS));
271		assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
272		checkEmpty(q);
#	Line 272 | Line 278 | public class LinkedTransferQueueTest ext
278		*/
279		public void testInterruptedTimedPoll() throws InterruptedException {
280		final BlockingQueue<Integer> q = populatedQueue(SIZE);
281	<	final CountDownLatch aboutToWait = new CountDownLatch(1);
281	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
282		Thread t = newStartedThread(new CheckedRunnable() {
283		public void realRun() throws InterruptedException {
284	<	for (int i = 0; i < SIZE; ++i) {
285	<	long t0 = System.nanoTime();
284	>	long startTime = System.nanoTime();
285	>	for (int i = 0; i < SIZE; ++i)
286		assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
287	<	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
288	<	}
283	<	long t0 = System.nanoTime();
284	<	aboutToWait.countDown();
287	>
288	>	pleaseInterrupt.countDown();
289		try {
290	<	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
290	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
291		shouldThrow();
292	<	} catch (InterruptedException success) {
293	<	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
294	<	}
292	>	} catch (InterruptedException success) {}
293	>	assertFalse(Thread.interrupted());
294	>
295	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
296		}});
297
298	<	aboutToWait.await();
299	<	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
298	>	await(pleaseInterrupt);
299	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
300		t.interrupt();
301	<	awaitTermination(t, MEDIUM_DELAY_MS);
301	>	awaitTermination(t);
302		checkEmpty(q);
303		}
304
#	Line 305 | Line 310 | public class LinkedTransferQueueTest ext
310		final BlockingQueue<Integer> q = populatedQueue(SIZE);
311		Thread t = newStartedThread(new CheckedRunnable() {
312		public void realRun() throws InterruptedException {
313	+	long startTime = System.nanoTime();
314		Thread.currentThread().interrupt();
315	<	for (int i = 0; i < SIZE; ++i) {
310	<	long t0 = System.nanoTime();
315	>	for (int i = 0; i < SIZE; ++i)
316		assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
312	–	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
313	–	}
317		try {
318	<	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
318	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
319		shouldThrow();
320		} catch (InterruptedException success) {}
321	+	assertFalse(Thread.interrupted());
322	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
323		}});
324
325	<	awaitTermination(t, MEDIUM_DELAY_MS);
325	>	awaitTermination(t);
326		checkEmpty(q);
327		}
328
#	Line 413 | Line 418 | public class LinkedTransferQueueTest ext
418		*/
419		public void testContainsAll() {
420		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
421	<	LinkedTransferQueue<Integer> p = new LinkedTransferQueue<Integer>();
421	>	LinkedTransferQueue<Integer> p = new LinkedTransferQueue<>();
422		for (int i = 0; i < SIZE; ++i) {
423		assertTrue(q.containsAll(p));
424		assertFalse(p.containsAll(q));
#	Line 499 | Line 504 | public class LinkedTransferQueueTest ext
504		public void testIterator() throws InterruptedException {
505		LinkedTransferQueue q = populatedQueue(SIZE);
506		Iterator it = q.iterator();
507	<	int i = 0;
508	<	while (it.hasNext()) {
509	<	assertEquals(it.next(), i++);
510	<	}
507	>	int i;
508	>	for (i = 0; it.hasNext(); i++)
509	>	assertTrue(q.contains(it.next()));
510	>	assertEquals(i, SIZE);
511	>	assertIteratorExhausted(it);
512	>
513	>	it = q.iterator();
514	>	for (i = 0; it.hasNext(); i++)
515	>	assertEquals(it.next(), q.take());
516		assertEquals(i, SIZE);
517	+	assertIteratorExhausted(it);
518	+	}
519	+
520	+	/**
521	+	* iterator of empty collection has no elements
522	+	*/
523	+	public void testEmptyIterator() {
524	+	assertIteratorExhausted(new LinkedTransferQueue().iterator());
525		}
526
527		/**
#	Line 529 | Line 547 | public class LinkedTransferQueueTest ext
547		* iterator ordering is FIFO
548		*/
549		public void testIteratorOrdering() {
550	<	final LinkedTransferQueue<Integer> q
533	<	= new LinkedTransferQueue<Integer>();
550	>	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
551		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
552		q.add(one);
553		q.add(two);
#	Line 575 | Line 592 | public class LinkedTransferQueueTest ext
592		public void testOfferInExecutor() {
593		final LinkedTransferQueue q = new LinkedTransferQueue();
594		final CheckedBarrier threadsStarted = new CheckedBarrier(2);
595	<	ExecutorService executor = Executors.newFixedThreadPool(2);
595	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
596	>	try (PoolCleaner cleaner = cleaner(executor)) {
597
598	<	executor.execute(new CheckedRunnable() {
599	<	public void realRun() throws InterruptedException {
600	<	threadsStarted.await();
601	<	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
602	<	}});
603	<
604	<	executor.execute(new CheckedRunnable() {
587	<	public void realRun() throws InterruptedException {
588	<	threadsStarted.await();
589	<	assertSame(one, q.take());
590	<	checkEmpty(q);
591	<	}});
598	>	executor.execute(new CheckedRunnable() {
599	>	public void realRun() throws InterruptedException {
600	>	threadsStarted.await();
601	>	long startTime = System.nanoTime();
602	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
603	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
604	>	}});
605
606	<	joinPool(executor);
606	>	executor.execute(new CheckedRunnable() {
607	>	public void realRun() throws InterruptedException {
608	>	threadsStarted.await();
609	>	assertSame(one, q.take());
610	>	checkEmpty(q);
611	>	}});
612	>	}
613		}
614
615		/**
#	Line 599 | Line 618 | public class LinkedTransferQueueTest ext
618		public void testPollInExecutor() {
619		final LinkedTransferQueue q = new LinkedTransferQueue();
620		final CheckedBarrier threadsStarted = new CheckedBarrier(2);
621	<	ExecutorService executor = Executors.newFixedThreadPool(2);
622	<
604	<	executor.execute(new CheckedRunnable() {
605	<	public void realRun() throws InterruptedException {
606	<	assertNull(q.poll());
607	<	threadsStarted.await();
608	<	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
609	<	checkEmpty(q);
610	<	}});
621	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
622	>	try (PoolCleaner cleaner = cleaner(executor)) {
623
624	<	executor.execute(new CheckedRunnable() {
625	<	public void realRun() throws InterruptedException {
626	<	threadsStarted.await();
627	<	q.put(one);
628	<	}});
624	>	executor.execute(new CheckedRunnable() {
625	>	public void realRun() throws InterruptedException {
626	>	assertNull(q.poll());
627	>	threadsStarted.await();
628	>	long startTime = System.nanoTime();
629	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
630	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
631	>	checkEmpty(q);
632	>	}});
633
634	<	joinPool(executor);
634	>	executor.execute(new CheckedRunnable() {
635	>	public void realRun() throws InterruptedException {
636	>	threadsStarted.await();
637	>	q.put(one);
638	>	}});
639	>	}
640		}
641
642		/**
#	Line 676 | Line 697 | public class LinkedTransferQueueTest ext
697		assertTrue(l.size() >= SIZE);
698		for (int i = 0; i < SIZE; ++i)
699		assertEquals(i, l.get(i));
700	<	awaitTermination(t, MEDIUM_DELAY_MS);
700	>	awaitTermination(t);
701		assertTrue(q.size() + l.size() >= SIZE);
702		}
703
#	Line 696 | Line 717 | public class LinkedTransferQueueTest ext
717		assertEquals(SIZE - k, q.size());
718		for (int j = 0; j < k; ++j)
719		assertEquals(j, l.get(j));
720	<	while (q.poll() != null)
700	<	;
720	>	do {} while (q.poll() != null);
721		}
722		}
723
#	Line 714 | Line 734 | public class LinkedTransferQueueTest ext
734		Thread t = newStartedThread(new CheckedRunnable() {
735		public void realRun() throws InterruptedException {
736		threadStarted.countDown();
737	+	long startTime = System.nanoTime();
738		assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
739		assertEquals(0, q.getWaitingConsumerCount());
740		assertFalse(q.hasWaitingConsumer());
741	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
742		}});
743
744		threadStarted.await();
745	<	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
746	<	assertEquals(1, q.getWaitingConsumerCount());
747	<	assertTrue(q.hasWaitingConsumer());
745	>	Callable<Boolean> oneConsumer
746	>	= new Callable<Boolean>() { public Boolean call() {
747	>	return q.hasWaitingConsumer()
748	>	&& q.getWaitingConsumerCount() == 1; }};
749	>	waitForThreadToEnterWaitState(t, oneConsumer);
750
751		assertTrue(q.offer(one));
752		assertEquals(0, q.getWaitingConsumerCount());
753		assertFalse(q.hasWaitingConsumer());
754
755	<	awaitTermination(t, MEDIUM_DELAY_MS);
755	>	awaitTermination(t);
756		}
757
758		/**
#	Line 744 | Line 768 | public class LinkedTransferQueueTest ext
768
769		/**
770		* transfer waits until a poll occurs. The transfered element
771	<	* is returned by this associated poll.
771	>	* is returned by the associated poll.
772		*/
773		public void testTransfer2() throws InterruptedException {
774	<	final LinkedTransferQueue<Integer> q
751	<	= new LinkedTransferQueue<Integer>();
774	>	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
775		final CountDownLatch threadStarted = new CountDownLatch(1);
776
777		Thread t = newStartedThread(new CheckedRunnable() {
#	Line 759 | Line 782 | public class LinkedTransferQueueTest ext
782		}});
783
784		threadStarted.await();
785	<	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
786	<	assertEquals(1, q.size());
785	>	Callable<Boolean> oneElement
786	>	= new Callable<Boolean>() { public Boolean call() {
787	>	return !q.isEmpty() && q.size() == 1; }};
788	>	waitForThreadToEnterWaitState(t, oneElement);
789	>
790		assertSame(five, q.poll());
791		checkEmpty(q);
792	<	awaitTermination(t, MEDIUM_DELAY_MS);
792	>	awaitTermination(t);
793		}
794
795		/**
796		* transfer waits until a poll occurs, and then transfers in fifo order
797		*/
798		public void testTransfer3() throws InterruptedException {
799	<	final LinkedTransferQueue<Integer> q
774	<	= new LinkedTransferQueue<Integer>();
799	>	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
800
801		Thread first = newStartedThread(new CheckedRunnable() {
802		public void realRun() throws InterruptedException {
803		q.transfer(four);
804	<	assertTrue(!q.contains(four));
804	>	assertFalse(q.contains(four));
805		assertEquals(1, q.size());
806		}});
807
#	Line 819 | Line 844 | public class LinkedTransferQueueTest ext
844		assertEquals(1, q.size());
845		assertTrue(q.offer(three));
846		assertSame(four, q.poll());
847	<	awaitTermination(t, MEDIUM_DELAY_MS);
847	>	awaitTermination(t);
848		}
849
850		/**
851		* transfer waits until a take occurs. The transfered element
852	<	* is returned by this associated take.
852	>	* is returned by the associated take.
853		*/
854		public void testTransfer5() throws InterruptedException {
855	<	final LinkedTransferQueue<Integer> q
831	<	= new LinkedTransferQueue<Integer>();
855	>	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
856
857		Thread t = newStartedThread(new CheckedRunnable() {
858		public void realRun() throws InterruptedException {
#	Line 842 | Line 866 | public class LinkedTransferQueueTest ext
866		assertEquals(1, q.size());
867		assertSame(four, q.take());
868		checkEmpty(q);
869	<	awaitTermination(t, MEDIUM_DELAY_MS);
869	>	awaitTermination(t);
870		}
871
872		/**
873		* tryTransfer(null) throws NullPointerException
874		*/
875		public void testTryTransfer1() {
876	+	final LinkedTransferQueue q = new LinkedTransferQueue();
877		try {
853	–	final LinkedTransferQueue q = new LinkedTransferQueue();
878		q.tryTransfer(null);
879		shouldThrow();
880		} catch (NullPointerException success) {}
#	Line 884 | Line 908 | public class LinkedTransferQueueTest ext
908		assertTrue(q.tryTransfer(hotPotato));
909		}});
910
911	<	assertSame(hotPotato, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
911	>	long startTime = System.nanoTime();
912	>	assertSame(hotPotato, q.poll(LONG_DELAY_MS, MILLISECONDS));
913	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
914		checkEmpty(q);
915	<	awaitTermination(t, MEDIUM_DELAY_MS);
915	>	awaitTermination(t);
916		}
917
918		/**
#	Line 908 | Line 934 | public class LinkedTransferQueueTest ext
934
935		assertSame(q.take(), hotPotato);
936		checkEmpty(q);
937	<	awaitTermination(t, MEDIUM_DELAY_MS);
937	>	awaitTermination(t);
938		}
939
940		/**
#	Line 921 | Line 947 | public class LinkedTransferQueueTest ext
947
948		Thread t = newStartedThread(new CheckedRunnable() {
949		public void realRun() throws InterruptedException {
950	+	long startTime = System.nanoTime();
951		Thread.currentThread().interrupt();
952		try {
953		q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
#	Line 934 | Line 961 | public class LinkedTransferQueueTest ext
961		shouldThrow();
962		} catch (InterruptedException success) {}
963		assertFalse(Thread.interrupted());
964	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
965		}});
966
967		await(pleaseInterrupt);
968	<	assertThreadStaysAlive(t);
968	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
969		t.interrupt();
970		awaitTermination(t);
971		checkEmpty(q);
#	Line 951 | Line 979 | public class LinkedTransferQueueTest ext
979
980		Thread t = newStartedThread(new CheckedRunnable() {
981		public void realRun() throws InterruptedException {
982	<	long t0 = System.nanoTime();
982	>	long startTime = System.nanoTime();
983		assertFalse(q.tryTransfer(new Object(),
984		timeoutMillis(), MILLISECONDS));
985	<	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
985	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
986		checkEmpty(q);
987		}});
988
#	Line 972 | Line 1000 | public class LinkedTransferQueueTest ext
1000
1001		Thread t = newStartedThread(new CheckedRunnable() {
1002		public void realRun() throws InterruptedException {
1003	<	assertTrue(q.tryTransfer(five, MEDIUM_DELAY_MS, MILLISECONDS));
1003	>	long startTime = System.nanoTime();
1004	>	assertTrue(q.tryTransfer(five, LONG_DELAY_MS, MILLISECONDS));
1005	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1006		checkEmpty(q);
1007		}});
1008
#	Line 982 | Line 1012 | public class LinkedTransferQueueTest ext
1012		assertSame(four, q.poll());
1013		assertSame(five, q.poll());
1014		checkEmpty(q);
1015	<	awaitTermination(t, MEDIUM_DELAY_MS);
1015	>	awaitTermination(t);
1016		}
1017
1018		/**
#	Line 993 | Line 1023 | public class LinkedTransferQueueTest ext
1023		final LinkedTransferQueue q = new LinkedTransferQueue();
1024		assertTrue(q.offer(four));
1025		assertEquals(1, q.size());
1026	<	long t0 = System.nanoTime();
1026	>	long startTime = System.nanoTime();
1027		assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
1028	<	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
1028	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
1029		assertEquals(1, q.size());
1030		assertSame(four, q.poll());
1031		assertNull(q.poll());
#	Line 1003 | Line 1033 | public class LinkedTransferQueueTest ext
1033		}
1034
1035		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1036	<	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1036	>	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
1037		checkEmpty(q);
1038		for (int i = 0; i < n; i++) {
1039		assertEquals(i, q.size());

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