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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 1.50 by jsr166, Sat Nov 26 05:19:17 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
8	<	import java.io.BufferedInputStream;
9	<	import java.io.BufferedOutputStream;
10	<	import java.io.ByteArrayInputStream;
11	<	import java.io.ByteArrayOutputStream;
12	<	import java.io.ObjectInputStream;
13	<	import java.io.ObjectOutputStream;
14	<	import java.util.ArrayList;
8	>	import junit.framework.*;
9		import java.util.Arrays;
10	+	import java.util.ArrayList;
11	+	import java.util.Collection;
12		import java.util.Iterator;
13		import java.util.List;
14		import java.util.NoSuchElementException;
15	<	import java.util.concurrent.*;
15	>	import java.util.Queue;
16	>	import java.util.concurrent.BlockingQueue;
17	>	import java.util.concurrent.CountDownLatch;
18	>	import java.util.concurrent.Executors;
19	>	import java.util.concurrent.ExecutorService;
20	>	import java.util.concurrent.LinkedTransferQueue;
21		import static java.util.concurrent.TimeUnit.MILLISECONDS;
22	<	import junit.framework.Test;
22	<	import junit.framework.TestSuite;
22	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
23
24		@SuppressWarnings({"unchecked", "rawtypes"})
25		public class LinkedTransferQueueTest extends JSR166TestCase {
26
27	+	public static class Generic extends BlockingQueueTest {
28	+	protected BlockingQueue emptyCollection() {
29	+	return new LinkedTransferQueue();
30	+	}
31	+	}
32	+
33		public static void main(String[] args) {
34		junit.textui.TestRunner.run(suite());
35		}
36
37		public static Test suite() {
38	<	return new TestSuite(LinkedTransferQueueTest.class);
39	<	}
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) {}
38	>	return newTestSuite(LinkedTransferQueueTest.class,
39	>	new Generic().testSuite());
40		}
41
42		/**
#	Line 80 | Line 64 | public class LinkedTransferQueueTest ext
64		* NullPointerException
65		*/
66		public void testConstructor3() {
67	+	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
68		try {
69	<	Integer[] ints = new Integer[SIZE];
85	<	new LinkedTransferQueue(Arrays.asList(ints));
69	>	new LinkedTransferQueue(elements);
70		shouldThrow();
71		} catch (NullPointerException success) {}
72		}
#	Line 92 | Line 76 | public class LinkedTransferQueueTest ext
76		* throws NullPointerException
77		*/
78		public void testConstructor4() {
79	+	Integer[] ints = new Integer[SIZE];
80	+	for (int i = 0; i < SIZE-1; ++i)
81	+	ints[i] = i;
82	+	Collection<Integer> elements = Arrays.asList(ints);
83		try {
84	<	Integer[] ints = new Integer[SIZE];
97	<	for (int i = 0; i < SIZE - 1; ++i) {
98	<	ints[i] = i;
99	<	}
100	<	new LinkedTransferQueue(Arrays.asList(ints));
84	>	new LinkedTransferQueue(elements);
85		shouldThrow();
86		} catch (NullPointerException success) {}
87		}
#	Line 144 | Line 128 | public class LinkedTransferQueueTest ext
128		}
129
130		/**
147	–	* offer(null) throws NullPointerException
148	–	*/
149	–	public void testOfferNull() {
150	–	try {
151	–	LinkedTransferQueue q = new LinkedTransferQueue();
152	–	q.offer(null);
153	–	shouldThrow();
154	–	} catch (NullPointerException success) {}
155	–	}
156	–
157	–	/**
158	–	* add(null) throws NullPointerException
159	–	*/
160	–	public void testAddNull() {
161	–	try {
162	–	LinkedTransferQueue q = new LinkedTransferQueue();
163	–	q.add(null);
164	–	shouldThrow();
165	–	} catch (NullPointerException success) {}
166	–	}
167	–
168	–	/**
169	–	* addAll(null) throws NullPointerException
170	–	*/
171	–	public void testAddAll1() {
172	–	try {
173	–	LinkedTransferQueue q = new LinkedTransferQueue();
174	–	q.addAll(null);
175	–	shouldThrow();
176	–	} catch (NullPointerException success) {}
177	–	}
178	–
179	–	/**
131		* addAll(this) throws IllegalArgumentException
132		*/
133		public void testAddAllSelf() {
#	Line 188 | Line 139 | public class LinkedTransferQueueTest ext
139		}
140
141		/**
191	–	* addAll of a collection with null elements throws NullPointerException
192	–	*/
193	–	public void testAddAll2() {
194	–	try {
195	–	LinkedTransferQueue q = new LinkedTransferQueue();
196	–	Integer[] ints = new Integer[SIZE];
197	–	q.addAll(Arrays.asList(ints));
198	–	shouldThrow();
199	–	} catch (NullPointerException success) {}
200	–	}
201	–
202	–	/**
142		* addAll of a collection with any null elements throws
143		* NullPointerException after possibly adding some elements
144		*/
#	Line 233 | Line 172 | public class LinkedTransferQueueTest ext
172		}
173
174		/**
236	–	* put(null) throws NullPointerException
237	–	*/
238	–	public void testPutNull() throws InterruptedException {
239	–	try {
240	–	LinkedTransferQueue q = new LinkedTransferQueue();
241	–	q.put(null);
242	–	shouldThrow();
243	–	} catch (NullPointerException success) {}
244	–	}
245	–
246	–	/**
175		* all elements successfully put are contained
176		*/
177		public void testPut() {
#	Line 266 | Line 194 | public class LinkedTransferQueueTest ext
194		}
195
196		/**
197	<	* 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
197	>	* take removes existing elements until empty, then blocks interruptibly
198		*/
199		public void testBlockingTake() throws InterruptedException {
200	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
201	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
202	<	void realRun() throws InterruptedException {
200	>	final BlockingQueue q = populatedQueue(SIZE);
201	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
202	>	Thread t = newStartedThread(new CheckedRunnable() {
203	>	public void realRun() throws InterruptedException {
204		for (int i = 0; i < SIZE; ++i) {
205	<	threadAssertEquals(i, (int) q.take());
205	>	assertEquals(i, q.take());
206		}
207	<	q.take();
207	>
208	>	Thread.currentThread().interrupt();
209	>	try {
210	>	q.take();
211	>	shouldThrow();
212	>	} catch (InterruptedException success) {}
213	>	assertFalse(Thread.interrupted());
214	>
215	>	pleaseInterrupt.countDown();
216	>	try {
217	>	q.take();
218	>	shouldThrow();
219	>	} catch (InterruptedException success) {}
220	>	assertFalse(Thread.interrupted());
221		}});
222	<	Thread.sleep(SMALL_DELAY_MS);
222	>
223	>	await(pleaseInterrupt);
224	>	assertThreadStaysAlive(t);
225		t.interrupt();
226	<	t.join();
297	<	checkEmpty(q);
226	>	awaitTermination(t);
227		}
228
229		/**
#	Line 310 | Line 239 | public class LinkedTransferQueueTest ext
239		}
240
241		/**
242	<	* timed pool with zero timeout succeeds when non-empty, else times out
242	>	* timed poll with zero timeout succeeds when non-empty, else times out
243		*/
244		public void testTimedPoll0() throws InterruptedException {
245		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
#	Line 322 | Line 251 | public class LinkedTransferQueueTest ext
251		}
252
253		/**
254	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
254	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
255		*/
256		public void testTimedPoll() throws InterruptedException {
257		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
258		for (int i = 0; i < SIZE; ++i) {
259	<	long t0 = System.nanoTime();
259	>	long startTime = System.nanoTime();
260		assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
261	<	long millisElapsed = (System.nanoTime() - t0)/(1024 * 1024);
333	<	assertTrue(millisElapsed < SMALL_DELAY_MS);
261	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
262		}
263	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
263	>	long startTime = System.nanoTime();
264	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
265	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
266		checkEmpty(q);
267		}
268
#	Line 341 | Line 271 | public class LinkedTransferQueueTest ext
271		* returning timeout status
272		*/
273		public void testInterruptedTimedPoll() throws InterruptedException {
274	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
274	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
275	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
276		Thread t = newStartedThread(new CheckedRunnable() {
277	<	void realRun() throws InterruptedException {
277	>	public void realRun() throws InterruptedException {
278		for (int i = 0; i < SIZE; ++i) {
279		long t0 = System.nanoTime();
280	<	threadAssertEquals(i, (int) q.poll(LONG_DELAY_MS,
281	<	MILLISECONDS));
351	<	long millisElapsed = (System.nanoTime() - t0)/(1024 * 1024);
352	<	assertTrue(millisElapsed < SMALL_DELAY_MS);
280	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
281	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
282		}
283	+	long t0 = System.nanoTime();
284	+	aboutToWait.countDown();
285		try {
286	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
286	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
287		shouldThrow();
288	<	} catch (InterruptedException success) {}
288	>	} catch (InterruptedException success) {
289	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
290	>	}
291		}});
292
293	<	Thread.sleep(SMALL_DELAY_MS);
293	>	aboutToWait.await();
294	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
295		t.interrupt();
296	<	t.join();
296	>	awaitTermination(t, MEDIUM_DELAY_MS);
297		checkEmpty(q);
298		}
299
300		/**
301	<	* timed poll before a delayed offer fails; after offer succeeds;
302	<	* on interruption throws
301	>	* timed poll after thread interrupted throws InterruptedException
302	>	* instead of returning timeout status
303		*/
304	<	public void testTimedPollWithOffer() throws InterruptedException {
305	<	final LinkedTransferQueue q = new LinkedTransferQueue();
306	<	Thread t = new Thread(new CheckedRunnable() {
307	<	void realRun() throws InterruptedException {
308	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
309	<	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
304	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
305	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
306	>	Thread t = newStartedThread(new CheckedRunnable() {
307	>	public void realRun() throws InterruptedException {
308	>	Thread.currentThread().interrupt();
309	>	for (int i = 0; i < SIZE; ++i) {
310	>	long t0 = System.nanoTime();
311	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
312	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
313	>	}
314		try {
315	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
315	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
316		shouldThrow();
317		} catch (InterruptedException success) {}
318		}});
319
320	<	Thread.sleep(SMALL_DELAY_MS);
321	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
384	<	t.interrupt();
385	<	t.join();
320	>	awaitTermination(t, MEDIUM_DELAY_MS);
321	>	checkEmpty(q);
322		}
323
324		/**
#	Line 432 | Line 368 | public class LinkedTransferQueueTest ext
368		}
369
370		/**
435	–	* remove(x) removes x and returns true if present
436	–	*/
437	–	public void testRemoveElement() throws InterruptedException {
438	–	LinkedTransferQueue q = populatedQueue(SIZE);
439	–	for (int i = 1; i < SIZE; i += 2) {
440	–	assertTrue(q.remove(i));
441	–	}
442	–	for (int i = 0; i < SIZE; i += 2) {
443	–	assertTrue(q.remove(i));
444	–	assertFalse(q.remove(i + 1));
445	–	}
446	–	checkEmpty(q);
447	–	}
448	–
449	–	/**
371		* An add following remove(x) succeeds
372		*/
373		public void testRemoveElementAndAdd() throws InterruptedException {
#	Line 456 | Line 377 | public class LinkedTransferQueueTest ext
377		assertTrue(q.remove(one));
378		assertTrue(q.remove(two));
379		assertTrue(q.add(three));
380	<	assertTrue(q.take() == three);
380	>	assertSame(q.take(), three);
381		}
382
383		/**
#	Line 538 | Line 459 | public class LinkedTransferQueueTest ext
459		}
460
461		/**
462	<	* toArray() contains all elements
462	>	* toArray() contains all elements in FIFO order
463		*/
464	<	public void testToArray() throws InterruptedException {
464	>	public void testToArray() {
465		LinkedTransferQueue q = populatedQueue(SIZE);
466		Object[] o = q.toArray();
467		for (int i = 0; i < o.length; i++) {
468	<	assertEquals(o[i], q.take());
468	>	assertSame(o[i], q.poll());
469		}
470		}
471
472		/**
473	<	* toArray(a) contains all elements
473	>	* toArray(a) contains all elements in FIFO order
474		*/
475	<	public void testToArray2() throws InterruptedException {
475	>	public void testToArray2() {
476		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
477		Integer[] ints = new Integer[SIZE];
478	<	ints = q.toArray(ints);
478	>	Integer[] array = q.toArray(ints);
479	>	assertSame(ints, array);
480		for (int i = 0; i < ints.length; i++) {
481	<	assertEquals(ints[i], q.take());
481	>	assertSame(ints[i], q.poll());
482		}
483		}
484
485		/**
486	<	* toArray(null) throws NullPointerException
565	<	*/
566	<	public void testToArray_BadArg() {
567	<	try {
568	<	LinkedTransferQueue q = populatedQueue(SIZE);
569	<	Object o[] = q.toArray(null);
570	<	shouldThrow();
571	<	} catch (NullPointerException success) {}
572	<	}
573	<
574	<	/**
575	<	* toArray(incompatible array type) throws CCE
486	>	* toArray(incompatible array type) throws ArrayStoreException
487		*/
488		public void testToArray1_BadArg() {
489	+	LinkedTransferQueue q = populatedQueue(SIZE);
490		try {
491	<	LinkedTransferQueue q = populatedQueue(SIZE);
580	<	Object o[] = q.toArray(new String[10]);
491	>	q.toArray(new String[10]);
492		shouldThrow();
493		} catch (ArrayStoreException success) {}
494		}
#	Line 609 | Line 520 | public class LinkedTransferQueueTest ext
520		it.remove();
521
522		it = q.iterator();
523	<	assertEquals(it.next(), one);
524	<	assertEquals(it.next(), three);
523	>	assertSame(it.next(), one);
524	>	assertSame(it.next(), three);
525		assertFalse(it.hasNext());
526		}
527
#	Line 654 | Line 565 | public class LinkedTransferQueueTest ext
565		LinkedTransferQueue q = populatedQueue(SIZE);
566		String s = q.toString();
567		for (int i = 0; i < SIZE; ++i) {
568	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
568	>	assertTrue(s.contains(String.valueOf(i)));
569		}
570		}
571
#	Line 663 | Line 574 | public class LinkedTransferQueueTest ext
574		*/
575		public void testOfferInExecutor() {
576		final LinkedTransferQueue q = new LinkedTransferQueue();
577	<	q.add(one);
667	<	q.add(two);
577	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
578		ExecutorService executor = Executors.newFixedThreadPool(2);
579
580		executor.execute(new CheckedRunnable() {
581	<	void realRun() {
582	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS,
583	<	MILLISECONDS));
581	>	public void realRun() throws InterruptedException {
582	>	threadsStarted.await();
583	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
584		}});
585
586		executor.execute(new CheckedRunnable() {
587	<	void realRun() throws InterruptedException {
588	<	Thread.sleep(SMALL_DELAY_MS);
589	<	threadAssertEquals(one, q.take());
587	>	public void realRun() throws InterruptedException {
588	>	threadsStarted.await();
589	>	assertSame(one, q.take());
590	>	checkEmpty(q);
591		}});
592
593		joinPool(executor);
#	Line 687 | Line 598 | public class LinkedTransferQueueTest ext
598		*/
599		public void testPollInExecutor() {
600		final LinkedTransferQueue q = new LinkedTransferQueue();
601	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
602		ExecutorService executor = Executors.newFixedThreadPool(2);
603
604		executor.execute(new CheckedRunnable() {
605	<	void realRun() throws InterruptedException {
606	<	threadAssertNull(q.poll());
607	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS,
608	<	MILLISECONDS));
609	<	threadAssertTrue(q.isEmpty());
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		}});
611
612		executor.execute(new CheckedRunnable() {
613	<	void realRun() throws InterruptedException {
614	<	Thread.sleep(SMALL_DELAY_MS);
613	>	public void realRun() throws InterruptedException {
614	>	threadsStarted.await();
615		q.put(one);
616		}});
617
#	Line 710 | Line 622 | public class LinkedTransferQueueTest ext
622		* A deserialized serialized queue has same elements in same order
623		*/
624		public void testSerialization() throws Exception {
625	<	LinkedTransferQueue q = populatedQueue(SIZE);
626	<
715	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
716	<	ObjectOutputStream out
717	<	= new ObjectOutputStream(new BufferedOutputStream(bout));
718	<	out.writeObject(q);
719	<	out.close();
625	>	Queue x = populatedQueue(SIZE);
626	>	Queue y = serialClone(x);
627
628	<	ByteArrayInputStream bin
629	<	= new ByteArrayInputStream(bout.toByteArray());
630	<	ObjectInputStream in
631	<	= new ObjectInputStream(new BufferedInputStream(bin));
632	<	LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
633	<
634	<	assertEquals(q.size(), r.size());
728	<	while (!q.isEmpty()) {
729	<	assertEquals(q.remove(), r.remove());
628	>	assertTrue(x != y);
629	>	assertEquals(x.size(), y.size());
630	>	assertEquals(x.toString(), y.toString());
631	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
632	>	while (!x.isEmpty()) {
633	>	assertFalse(y.isEmpty());
634	>	assertEquals(x.remove(), y.remove());
635		}
636	<	}
732	<
733	<	/**
734	<	* drainTo(null) throws NullPointerException
735	<	*/
736	<	public void testDrainToNull() {
737	<	LinkedTransferQueue q = populatedQueue(SIZE);
738	<	try {
739	<	q.drainTo(null);
740	<	shouldThrow();
741	<	} catch (NullPointerException success) {}
742	<	}
743	<
744	<	/**
745	<	* drainTo(this) throws IllegalArgumentException
746	<	*/
747	<	public void testDrainToSelf() {
748	<	LinkedTransferQueue q = populatedQueue(SIZE);
749	<	try {
750	<	q.drainTo(q);
751	<	shouldThrow();
752	<	} catch (IllegalArgumentException success) {}
636	>	assertTrue(y.isEmpty());
637		}
638
639		/**
#	Line 759 | Line 643 | public class LinkedTransferQueueTest ext
643		LinkedTransferQueue q = populatedQueue(SIZE);
644		ArrayList l = new ArrayList();
645		q.drainTo(l);
646	<	assertEquals(q.size(), 0);
647	<	assertEquals(l.size(), SIZE);
646	>	assertEquals(0, q.size());
647	>	assertEquals(SIZE, l.size());
648		for (int i = 0; i < SIZE; ++i) {
649		assertEquals(l.get(i), i);
650		}
#	Line 771 | Line 655 | public class LinkedTransferQueueTest ext
655		assertTrue(q.contains(one));
656		l.clear();
657		q.drainTo(l);
658	<	assertEquals(q.size(), 0);
659	<	assertEquals(l.size(), 2);
658	>	assertEquals(0, q.size());
659	>	assertEquals(2, l.size());
660		for (int i = 0; i < 2; ++i) {
661		assertEquals(l.get(i), i);
662		}
#	Line 784 | Line 668 | public class LinkedTransferQueueTest ext
668		public void testDrainToWithActivePut() throws InterruptedException {
669		final LinkedTransferQueue q = populatedQueue(SIZE);
670		Thread t = newStartedThread(new CheckedRunnable() {
671	<	void realRun() {
671	>	public void realRun() {
672		q.put(SIZE + 1);
673		}});
674		ArrayList l = new ArrayList();
#	Line 793 | Line 677 | public class LinkedTransferQueueTest ext
677		for (int i = 0; i < SIZE; ++i) {
678		assertEquals(l.get(i), i);
679		}
680	<	t.join();
680	>	awaitTermination(t, MEDIUM_DELAY_MS);
681		assertTrue(q.size() + l.size() >= SIZE);
682		}
683
684		/**
685	<	* drainTo(null, n) throws NullPointerException
802	<	*/
803	<	public void testDrainToNullN() {
804	<	LinkedTransferQueue q = populatedQueue(SIZE);
805	<	try {
806	<	q.drainTo(null, SIZE);
807	<	shouldThrow();
808	<	} catch (NullPointerException success) {}
809	<	}
810	<
811	<	/**
812	<	* drainTo(this, n) throws IllegalArgumentException
813	<	*/
814	<	public void testDrainToSelfN() {
815	<	LinkedTransferQueue q = populatedQueue(SIZE);
816	<	try {
817	<	q.drainTo(q, SIZE);
818	<	shouldThrow();
819	<	} catch (IllegalArgumentException success) {}
820	<	}
821	<
822	<	/**
823	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
685	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
686		*/
687		public void testDrainToN() {
688		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 847 | Line 709 | public class LinkedTransferQueueTest ext
709		*/
710		public void testWaitingConsumer() throws InterruptedException {
711		final LinkedTransferQueue q = new LinkedTransferQueue();
712	<	assertEquals(q.getWaitingConsumerCount(), 0);
712	>	assertEquals(0, q.getWaitingConsumerCount());
713		assertFalse(q.hasWaitingConsumer());
714	+	final CountDownLatch threadStarted = new CountDownLatch(1);
715
716		Thread t = newStartedThread(new CheckedRunnable() {
717	<	void realRun() throws InterruptedException {
718	<	Thread.sleep(SMALL_DELAY_MS);
719	<	threadAssertTrue(q.hasWaitingConsumer());
720	<	threadAssertEquals(q.getWaitingConsumerCount(), 1);
721	<	threadAssertTrue(q.offer(new Object()));
859	<	threadAssertFalse(q.hasWaitingConsumer());
860	<	threadAssertEquals(q.getWaitingConsumerCount(), 0);
717	>	public void realRun() throws InterruptedException {
718	>	threadStarted.countDown();
719	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
720	>	assertEquals(0, q.getWaitingConsumerCount());
721	>	assertFalse(q.hasWaitingConsumer());
722		}});
723
724	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) != null);
725	<	assertEquals(q.getWaitingConsumerCount(), 0);
724	>	threadStarted.await();
725	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
726	>	assertEquals(1, q.getWaitingConsumerCount());
727	>	assertTrue(q.hasWaitingConsumer());
728	>
729	>	assertTrue(q.offer(one));
730	>	assertEquals(0, q.getWaitingConsumerCount());
731		assertFalse(q.hasWaitingConsumer());
732	<	t.join();
732	>
733	>	awaitTermination(t, MEDIUM_DELAY_MS);
734		}
735
736		/**
#	Line 884 | Line 751 | public class LinkedTransferQueueTest ext
751		public void testTransfer2() throws InterruptedException {
752		final LinkedTransferQueue<Integer> q
753		= new LinkedTransferQueue<Integer>();
754	+	final CountDownLatch threadStarted = new CountDownLatch(1);
755
756		Thread t = newStartedThread(new CheckedRunnable() {
757	<	void realRun() throws InterruptedException {
758	<	q.transfer(SIZE);
759	<	threadAssertTrue(q.isEmpty());
757	>	public void realRun() throws InterruptedException {
758	>	threadStarted.countDown();
759	>	q.transfer(five);
760	>	checkEmpty(q);
761		}});
762
763	<	Thread.sleep(SHORT_DELAY_MS);
763	>	threadStarted.await();
764	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
765		assertEquals(1, q.size());
766	<	assertEquals(SIZE, (int) q.poll());
767	<	assertTrue(q.isEmpty());
768	<	t.join();
766	>	assertSame(five, q.poll());
767	>	checkEmpty(q);
768	>	awaitTermination(t, MEDIUM_DELAY_MS);
769		}
770
771		/**
#	Line 906 | Line 776 | public class LinkedTransferQueueTest ext
776		= new LinkedTransferQueue<Integer>();
777
778		Thread first = newStartedThread(new CheckedRunnable() {
779	<	void realRun() throws InterruptedException {
780	<	Integer i = SIZE + 1;
781	<	q.transfer(i);
782	<	threadAssertTrue(!q.contains(i));
913	<	threadAssertEquals(1, q.size());
779	>	public void realRun() throws InterruptedException {
780	>	q.transfer(four);
781	>	assertTrue(!q.contains(four));
782	>	assertEquals(1, q.size());
783		}});
784
785		Thread interruptedThread = newStartedThread(
786		new CheckedInterruptedRunnable() {
787	<	void realRun() throws InterruptedException {
788	<	while (q.size() == 0)
787	>	public void realRun() throws InterruptedException {
788	>	while (q.isEmpty())
789		Thread.yield();
790	<	q.transfer(SIZE);
790	>	q.transfer(five);
791		}});
792
793		while (q.size() < 2)
794		Thread.yield();
795		assertEquals(2, q.size());
796	<	assertEquals(SIZE + 1, (int) q.poll());
796	>	assertSame(four, q.poll());
797		first.join();
798		assertEquals(1, q.size());
799		interruptedThread.interrupt();
800		interruptedThread.join();
801	<	assertEquals(0, q.size());
933	<	assertTrue(q.isEmpty());
801	>	checkEmpty(q);
802		}
803
804		/**
#	Line 941 | Line 809 | public class LinkedTransferQueueTest ext
809		final LinkedTransferQueue q = new LinkedTransferQueue();
810
811		Thread t = newStartedThread(new CheckedRunnable() {
812	<	void realRun() throws InterruptedException {
812	>	public void realRun() throws InterruptedException {
813		q.transfer(four);
814	<	threadAssertFalse(q.contains(four));
815	<	threadAssertEquals(three, q.poll());
814	>	assertFalse(q.contains(four));
815	>	assertSame(three, q.poll());
816		}});
817
818	<	Thread.sleep(SHORT_DELAY_MS);
818	>	while (q.isEmpty())
819	>	Thread.yield();
820	>	assertFalse(q.isEmpty());
821	>	assertEquals(1, q.size());
822		assertTrue(q.offer(three));
823	<	assertEquals(four, q.poll());
824	<	t.join();
823	>	assertSame(four, q.poll());
824	>	awaitTermination(t, MEDIUM_DELAY_MS);
825		}
826
827		/**
#	Line 962 | Line 833 | public class LinkedTransferQueueTest ext
833		= new LinkedTransferQueue<Integer>();
834
835		Thread t = newStartedThread(new CheckedRunnable() {
836	<	void realRun() throws InterruptedException {
837	<	q.transfer(SIZE);
836	>	public void realRun() throws InterruptedException {
837	>	q.transfer(four);
838		checkEmpty(q);
839		}});
840
841	<	Thread.sleep(SHORT_DELAY_MS);
842	<	assertEquals(SIZE, (int) q.take());
841	>	while (q.isEmpty())
842	>	Thread.yield();
843	>	assertFalse(q.isEmpty());
844	>	assertEquals(1, q.size());
845	>	assertSame(four, q.take());
846		checkEmpty(q);
847	<	t.join();
847	>	awaitTermination(t, MEDIUM_DELAY_MS);
848		}
849
850		/**
#	Line 1004 | Line 878 | public class LinkedTransferQueueTest ext
878		final LinkedTransferQueue q = new LinkedTransferQueue();
879
880		Thread t = newStartedThread(new CheckedRunnable() {
881	<	void realRun() {
881	>	public void realRun() {
882		while (! q.hasWaitingConsumer())
883		Thread.yield();
884	<	threadAssertTrue(q.hasWaitingConsumer());
885	<	threadAssertTrue(q.isEmpty());
886	<	threadAssertTrue(q.size() == 0);
1013	<	threadAssertTrue(q.tryTransfer(hotPotato));
884	>	assertTrue(q.hasWaitingConsumer());
885	>	checkEmpty(q);
886	>	assertTrue(q.tryTransfer(hotPotato));
887		}});
888
889	<	assertTrue(q.poll(MEDIUM_DELAY_MS, MILLISECONDS) == hotPotato);
889	>	assertSame(hotPotato, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
890		checkEmpty(q);
891	<	t.join();
891	>	awaitTermination(t, MEDIUM_DELAY_MS);
892		}
893
894		/**
#	Line 1027 | Line 900 | public class LinkedTransferQueueTest ext
900		final LinkedTransferQueue q = new LinkedTransferQueue();
901
902		Thread t = newStartedThread(new CheckedRunnable() {
903	<	void realRun() {
903	>	public void realRun() {
904		while (! q.hasWaitingConsumer())
905		Thread.yield();
906	<	threadAssertTrue(q.hasWaitingConsumer());
907	<	threadAssertTrue(q.isEmpty());
908	<	threadAssertTrue(q.size() == 0);
1036	<	threadAssertTrue(q.tryTransfer(hotPotato));
906	>	assertTrue(q.hasWaitingConsumer());
907	>	checkEmpty(q);
908	>	assertTrue(q.tryTransfer(hotPotato));
909		}});
910
911	<	assertTrue(q.take() == hotPotato);
911	>	assertSame(q.take(), hotPotato);
912		checkEmpty(q);
913	<	t.join();
913	>	awaitTermination(t, MEDIUM_DELAY_MS);
914		}
915
916		/**
917	<	* tryTransfer waits the amount given if interrupted, and
1046	<	* throws interrupted exception
917	>	* tryTransfer blocks interruptibly if no takers
918		*/
919		public void testTryTransfer5() throws InterruptedException {
920		final LinkedTransferQueue q = new LinkedTransferQueue();
921	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
922	+	assertTrue(q.isEmpty());
923	+
924	+	Thread t = newStartedThread(new CheckedRunnable() {
925	+	public void realRun() throws InterruptedException {
926	+	Thread.currentThread().interrupt();
927	+	try {
928	+	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
929	+	shouldThrow();
930	+	} catch (InterruptedException success) {}
931	+	assertFalse(Thread.interrupted());
932
933	<	Thread toInterrupt = newStartedThread(new CheckedInterruptedRunnable() {
934	<	void realRun() throws InterruptedException {
935	<	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
933	>	pleaseInterrupt.countDown();
934	>	try {
935	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
936	>	shouldThrow();
937	>	} catch (InterruptedException success) {}
938	>	assertFalse(Thread.interrupted());
939		}});
940
941	<	Thread.sleep(SMALL_DELAY_MS);
942	<	toInterrupt.interrupt();
943	<	toInterrupt.join();
941	>	await(pleaseInterrupt);
942	>	assertThreadStaysAlive(t);
943	>	t.interrupt();
944	>	awaitTermination(t);
945	>	checkEmpty(q);
946		}
947
948		/**
949	<	* tryTransfer gives up after the timeout and return false
949	>	* tryTransfer gives up after the timeout and returns false
950		*/
951		public void testTryTransfer6() throws InterruptedException {
952		final LinkedTransferQueue q = new LinkedTransferQueue();
953
954		Thread t = newStartedThread(new CheckedRunnable() {
955	<	void realRun() throws InterruptedException {
956	<	threadAssertFalse
957	<	(q.tryTransfer(new Object(),
958	<	SHORT_DELAY_MS, MILLISECONDS));
955	>	public void realRun() throws InterruptedException {
956	>	long t0 = System.nanoTime();
957	>	assertFalse(q.tryTransfer(new Object(),
958	>	timeoutMillis(), MILLISECONDS));
959	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
960	>	checkEmpty(q);
961		}});
962
963	<	Thread.sleep(SMALL_DELAY_MS);
963	>	awaitTermination(t);
964		checkEmpty(q);
1076	–	t.join();
965		}
966
967		/**
#	Line 1085 | Line 973 | public class LinkedTransferQueueTest ext
973		assertTrue(q.offer(four));
974
975		Thread t = newStartedThread(new CheckedRunnable() {
976	<	void realRun() throws InterruptedException {
977	<	threadAssertTrue(q.tryTransfer(five,
978	<	MEDIUM_DELAY_MS, MILLISECONDS));
1091	<	threadAssertTrue(q.isEmpty());
976	>	public void realRun() throws InterruptedException {
977	>	assertTrue(q.tryTransfer(five, MEDIUM_DELAY_MS, MILLISECONDS));
978	>	checkEmpty(q);
979		}});
980
981	<	Thread.sleep(SHORT_DELAY_MS);
981	>	while (q.size() != 2)
982	>	Thread.yield();
983		assertEquals(2, q.size());
984	<	assertEquals(four, q.poll());
985	<	assertEquals(five, q.poll());
984	>	assertSame(four, q.poll());
985	>	assertSame(five, q.poll());
986		checkEmpty(q);
987	<	t.join();
987	>	awaitTermination(t, MEDIUM_DELAY_MS);
988		}
989
990		/**
991	<	* tryTransfer attempts to enqueue into the q and fails returning
992	<	* false not enqueueing and the successive poll is null
991	>	* tryTransfer attempts to enqueue into the queue and fails
992	>	* returning false not enqueueing and the successive poll is null
993		*/
994		public void testTryTransfer8() throws InterruptedException {
995		final LinkedTransferQueue q = new LinkedTransferQueue();
996		assertTrue(q.offer(four));
997		assertEquals(1, q.size());
998	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
998	>	long t0 = System.nanoTime();
999	>	assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
1000	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
1001		assertEquals(1, q.size());
1002	<	assertEquals(four, q.poll());
1002	>	assertSame(four, q.poll());
1003		assertNull(q.poll());
1004		checkEmpty(q);
1005		}
1006
1007		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1008		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1009	<	assertTrue(q.isEmpty());
1009	>	checkEmpty(q);
1010		for (int i = 0; i < n; i++) {
1011		assertEquals(i, q.size());
1012		assertTrue(q.offer(i));

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