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

Comparing jsr166/src/test/tck/LinkedTransferQueueTest.java (file contents):
Revision 1.15 by jsr166, Sat Nov 21 17:38:05 2009 UTC vs.
Revision 1.48 by jsr166, Tue May 31 16:16:24 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	<	}
49	<	try {
50	<	q.iterator().next();
51	<	shouldThrow();
52	<	} catch (NoSuchElementException success) {
53	<	}
54	<	try {
55	<	q.remove();
56	<	shouldThrow();
57	<	} catch (NoSuchElementException success) {
58	<	}
38	>	return newTestSuite(LinkedTransferQueueTest.class,
39	>	new Generic().testSuite());
40		}
41
42		/**
#	Line 75 | Line 56 | public class LinkedTransferQueueTest ext
56		try {
57		new LinkedTransferQueue(null);
58		shouldThrow();
59	<	} catch (NullPointerException success) {
79	<	}
59	>	} catch (NullPointerException success) {}
60		}
61
62		/**
#	Line 84 | 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];
89	<	new LinkedTransferQueue(Arrays.asList(ints));
69	>	new LinkedTransferQueue(elements);
70		shouldThrow();
71	<	} catch (NullPointerException success) {
92	<	}
71	>	} catch (NullPointerException success) {}
72		}
73
74		/**
#	Line 97 | 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];
102	<	for (int i = 0; i < SIZE - 1; ++i) {
103	<	ints[i] = i;
104	<	}
105	<	new LinkedTransferQueue(Arrays.asList(ints));
84	>	new LinkedTransferQueue(elements);
85		shouldThrow();
86	<	} catch (NullPointerException success) {
108	<	}
86	>	} catch (NullPointerException success) {}
87		}
88
89		/**
#	Line 150 | Line 128 | public class LinkedTransferQueueTest ext
128		}
129
130		/**
153	–	* offer(null) throws NullPointerException
154	–	*/
155	–	public void testOfferNull() {
156	–	try {
157	–	LinkedTransferQueue q = new LinkedTransferQueue();
158	–	q.offer(null);
159	–	shouldThrow();
160	–	} catch (NullPointerException success) {
161	–	}
162	–	}
163	–
164	–	/**
165	–	* add(null) throws NullPointerException
166	–	*/
167	–	public void testAddNull() {
168	–	try {
169	–	LinkedTransferQueue q = new LinkedTransferQueue();
170	–	q.add(null);
171	–	shouldThrow();
172	–	} catch (NullPointerException success) {
173	–	}
174	–	}
175	–
176	–	/**
177	–	* addAll(null) throws NullPointerException
178	–	*/
179	–	public void testAddAll1() {
180	–	try {
181	–	LinkedTransferQueue q = new LinkedTransferQueue();
182	–	q.addAll(null);
183	–	shouldThrow();
184	–	} catch (NullPointerException success) {
185	–	}
186	–	}
187	–
188	–	/**
131		* addAll(this) throws IllegalArgumentException
132		*/
133		public void testAddAllSelf() {
#	Line 193 | Line 135 | public class LinkedTransferQueueTest ext
135		LinkedTransferQueue q = populatedQueue(SIZE);
136		q.addAll(q);
137		shouldThrow();
138	<	} catch (IllegalArgumentException success) {
197	<	}
198	<	}
199	<
200	<	/**
201	<	* addAll of a collection with null elements throws NullPointerException
202	<	*/
203	<	public void testAddAll2() {
204	<	try {
205	<	LinkedTransferQueue q = new LinkedTransferQueue();
206	<	Integer[] ints = new Integer[SIZE];
207	<	q.addAll(Arrays.asList(ints));
208	<	shouldThrow();
209	<	} catch (NullPointerException success) {
210	<	}
138	>	} catch (IllegalArgumentException success) {}
139		}
140
141		/**
#	Line 223 | Line 151 | public class LinkedTransferQueueTest ext
151		}
152		q.addAll(Arrays.asList(ints));
153		shouldThrow();
154	<	} catch (NullPointerException success) {
227	<	}
154	>	} catch (NullPointerException success) {}
155		}
156
157		/**
#	Line 245 | Line 172 | public class LinkedTransferQueueTest ext
172		}
173
174		/**
248	–	* put(null) throws NullPointerException
249	–	*/
250	–	public void testPutNull() throws InterruptedException {
251	–	try {
252	–	LinkedTransferQueue q = new LinkedTransferQueue();
253	–	q.put(null);
254	–	shouldThrow();
255	–	} catch (NullPointerException success) {}
256	–	}
257	–
258	–	/**
175		* all elements successfully put are contained
176		*/
177		public void testPut() {
#	Line 278 | Line 194 | public class LinkedTransferQueueTest ext
194		}
195
196		/**
197	<	* take blocks interruptibly when empty
282	<	*/
283	<	public void testTakeFromEmpty() throws InterruptedException {
284	<	final LinkedTransferQueue q = new LinkedTransferQueue();
285	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
286	<	void realRun() throws InterruptedException {
287	<	q.take();
288	<	}});
289	<	Thread.sleep(SHORT_DELAY_MS);
290	<	t.interrupt();
291	<	t.join();
292	<	}
293	<
294	<	/**
295	<	* 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();
309	<	checkEmpty(q);
226	>	awaitTermination(t);
227		}
228
229		/**
#	Line 322 | 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 334 | 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);
345	<	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 353 | Line 271 | public class LinkedTransferQueueTest ext
271		* returning timeout status
272		*/
273		public void testInterruptedTimedPoll() throws InterruptedException {
274	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
275	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
276	<	void realRun() throws InterruptedException {
274	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
275	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
276	>	Thread t = newStartedThread(new CheckedRunnable() {
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));
282	<	long millisElapsed = (System.nanoTime() - t0)/(1024 * 1024);
283	<	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(MEDIUM_DELAY_MS, MILLISECONDS);
287	>	shouldThrow();
288	>	} catch (InterruptedException success) {
289	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
290		}
366	–	q.poll(LONG_DELAY_MS, MILLISECONDS);
291		}});
292	<	Thread.sleep(SMALL_DELAY_MS);
292	>
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 = newStartedThread(new CheckedInterruptedRunnable() {
307	<	void realRun() throws InterruptedException {
308	<	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
309	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
310	<	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(MEDIUM_DELAY_MS, MILLISECONDS);
316	>	shouldThrow();
317	>	} catch (InterruptedException success) {}
318		}});
319	<	Thread.sleep(SMALL_DELAY_MS);
320	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
321	<	t.interrupt();
389	<	t.join();
319	>
320	>	awaitTermination(t, MEDIUM_DELAY_MS);
321	>	checkEmpty(q);
322		}
323
324		/**
#	Line 416 | Line 348 | public class LinkedTransferQueueTest ext
348		try {
349		q.element();
350		shouldThrow();
351	<	} catch (NoSuchElementException success) {
420	<	}
351	>	} catch (NoSuchElementException success) {}
352		checkEmpty(q);
353		}
354
#	Line 432 | Line 363 | public class LinkedTransferQueueTest ext
363		try {
364		q.remove();
365		shouldThrow();
366	<	} catch (NoSuchElementException success) {
436	<	}
366	>	} catch (NoSuchElementException success) {}
367		checkEmpty(q);
368		}
369
#	Line 442 | Line 372 | public class LinkedTransferQueueTest ext
372		*/
373		public void testRemoveElement() throws InterruptedException {
374		LinkedTransferQueue q = populatedQueue(SIZE);
375	<	for (int i = 1; i < SIZE; i += 2) {
375	>	for (int i = 1; i < SIZE; i+=2) {
376	>	assertTrue(q.contains(i));
377		assertTrue(q.remove(i));
378	+	assertFalse(q.contains(i));
379	+	assertTrue(q.contains(i-1));
380		}
381	<	for (int i = 0; i < SIZE; i += 2) {
381	>	for (int i = 0; i < SIZE; i+=2) {
382	>	assertTrue(q.contains(i));
383		assertTrue(q.remove(i));
384	<	assertFalse(q.remove(i + 1));
384	>	assertFalse(q.contains(i));
385	>	assertFalse(q.remove(i+1));
386	>	assertFalse(q.contains(i+1));
387		}
388		checkEmpty(q);
389		}
#	Line 462 | Line 398 | public class LinkedTransferQueueTest ext
398		assertTrue(q.remove(one));
399		assertTrue(q.remove(two));
400		assertTrue(q.add(three));
401	<	assertTrue(q.take() == three);
401	>	assertSame(q.take(), three);
402		}
403
404		/**
#	Line 544 | Line 480 | public class LinkedTransferQueueTest ext
480		}
481
482		/**
483	<	* toArray() contains all elements
483	>	* toArray() contains all elements in FIFO order
484		*/
485	<	public void testToArray() throws InterruptedException {
485	>	public void testToArray() {
486		LinkedTransferQueue q = populatedQueue(SIZE);
487		Object[] o = q.toArray();
488		for (int i = 0; i < o.length; i++) {
489	<	assertEquals(o[i], q.take());
489	>	assertSame(o[i], q.poll());
490		}
491		}
492
493		/**
494	<	* toArray(a) contains all elements
494	>	* toArray(a) contains all elements in FIFO order
495		*/
496	<	public void testToArray2() throws InterruptedException {
496	>	public void testToArray2() {
497		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
498		Integer[] ints = new Integer[SIZE];
499	<	ints = q.toArray(ints);
499	>	Integer[] array = q.toArray(ints);
500	>	assertSame(ints, array);
501		for (int i = 0; i < ints.length; i++) {
502	<	assertEquals(ints[i], q.take());
566	<	}
567	<	}
568	<
569	<	/**
570	<	* toArray(null) throws NullPointerException
571	<	*/
572	<	public void testToArray_BadArg() {
573	<	try {
574	<	LinkedTransferQueue q = populatedQueue(SIZE);
575	<	Object o[] = q.toArray(null);
576	<	shouldThrow();
577	<	} catch (NullPointerException success) {
502	>	assertSame(ints[i], q.poll());
503		}
504		}
505
506		/**
507	<	* toArray(incompatible array type) throws CCE
507	>	* toArray(incompatible array type) throws ArrayStoreException
508		*/
509		public void testToArray1_BadArg() {
510	+	LinkedTransferQueue q = populatedQueue(SIZE);
511		try {
512	<	LinkedTransferQueue q = populatedQueue(SIZE);
587	<	Object o[] = q.toArray(new String[10]);
512	>	q.toArray(new String[10]);
513		shouldThrow();
514	<	} catch (ArrayStoreException success) {
590	<	}
514	>	} catch (ArrayStoreException success) {}
515		}
516
517		/**
#	Line 617 | Line 541 | public class LinkedTransferQueueTest ext
541		it.remove();
542
543		it = q.iterator();
544	<	assertEquals(it.next(), one);
545	<	assertEquals(it.next(), three);
544	>	assertSame(it.next(), one);
545	>	assertSame(it.next(), three);
546		assertFalse(it.hasNext());
547		}
548
#	Line 662 | Line 586 | public class LinkedTransferQueueTest ext
586		LinkedTransferQueue q = populatedQueue(SIZE);
587		String s = q.toString();
588		for (int i = 0; i < SIZE; ++i) {
589	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
589	>	assertTrue(s.contains(String.valueOf(i)));
590		}
591		}
592
#	Line 671 | Line 595 | public class LinkedTransferQueueTest ext
595		*/
596		public void testOfferInExecutor() {
597		final LinkedTransferQueue q = new LinkedTransferQueue();
598	<	q.add(one);
675	<	q.add(two);
598	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
599		ExecutorService executor = Executors.newFixedThreadPool(2);
600
601		executor.execute(new CheckedRunnable() {
602	<	void realRun() {
603	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS,
604	<	MILLISECONDS));
602	>	public void realRun() throws InterruptedException {
603	>	threadsStarted.await();
604	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
605		}});
606
607		executor.execute(new CheckedRunnable() {
608	<	void realRun() throws InterruptedException {
609	<	Thread.sleep(SMALL_DELAY_MS);
610	<	threadAssertEquals(one, q.take());
608	>	public void realRun() throws InterruptedException {
609	>	threadsStarted.await();
610	>	assertSame(one, q.take());
611	>	checkEmpty(q);
612		}});
613
614		joinPool(executor);
#	Line 695 | Line 619 | public class LinkedTransferQueueTest ext
619		*/
620		public void testPollInExecutor() {
621		final LinkedTransferQueue q = new LinkedTransferQueue();
622	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
623		ExecutorService executor = Executors.newFixedThreadPool(2);
624
625		executor.execute(new CheckedRunnable() {
626	<	void realRun() throws InterruptedException {
627	<	threadAssertNull(q.poll());
628	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS,
629	<	MILLISECONDS));
630	<	threadAssertTrue(q.isEmpty());
626	>	public void realRun() throws InterruptedException {
627	>	assertNull(q.poll());
628	>	threadsStarted.await();
629	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
630	>	checkEmpty(q);
631		}});
632
633		executor.execute(new CheckedRunnable() {
634	<	void realRun() throws InterruptedException {
635	<	Thread.sleep(SMALL_DELAY_MS);
634	>	public void realRun() throws InterruptedException {
635	>	threadsStarted.await();
636		q.put(one);
637		}});
638
#	Line 718 | Line 643 | public class LinkedTransferQueueTest ext
643		* A deserialized serialized queue has same elements in same order
644		*/
645		public void testSerialization() throws Exception {
646	<	LinkedTransferQueue q = populatedQueue(SIZE);
647	<
723	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
724	<	ObjectOutputStream out
725	<	= new ObjectOutputStream(new BufferedOutputStream(bout));
726	<	out.writeObject(q);
727	<	out.close();
646	>	Queue x = populatedQueue(SIZE);
647	>	Queue y = serialClone(x);
648
649	<	ByteArrayInputStream bin
650	<	= new ByteArrayInputStream(bout.toByteArray());
651	<	ObjectInputStream in
652	<	= new ObjectInputStream(new BufferedInputStream(bin));
653	<	LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
654	<
655	<	assertEquals(q.size(), r.size());
736	<	while (!q.isEmpty()) {
737	<	assertEquals(q.remove(), r.remove());
738	<	}
739	<	}
740	<
741	<	/**
742	<	* drainTo(null) throws NullPointerException
743	<	*/
744	<	public void testDrainToNull() {
745	<	LinkedTransferQueue q = populatedQueue(SIZE);
746	<	try {
747	<	q.drainTo(null);
748	<	shouldThrow();
749	<	} catch (NullPointerException success) {
750	<	}
751	<	}
752	<
753	<	/**
754	<	* drainTo(this) throws IllegalArgumentException
755	<	*/
756	<	public void testDrainToSelf() {
757	<	LinkedTransferQueue q = populatedQueue(SIZE);
758	<	try {
759	<	q.drainTo(q);
760	<	shouldThrow();
761	<	} catch (IllegalArgumentException success) {
649	>	assertTrue(x != y);
650	>	assertEquals(x.size(), y.size());
651	>	assertEquals(x.toString(), y.toString());
652	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
653	>	while (!x.isEmpty()) {
654	>	assertFalse(y.isEmpty());
655	>	assertEquals(x.remove(), y.remove());
656		}
657	+	assertTrue(y.isEmpty());
658		}
659
660		/**
#	Line 794 | Line 689 | public class LinkedTransferQueueTest ext
689		public void testDrainToWithActivePut() throws InterruptedException {
690		final LinkedTransferQueue q = populatedQueue(SIZE);
691		Thread t = newStartedThread(new CheckedRunnable() {
692	<	void realRun() {
692	>	public void realRun() {
693		q.put(SIZE + 1);
694		}});
695		ArrayList l = new ArrayList();
#	Line 803 | Line 698 | public class LinkedTransferQueueTest ext
698		for (int i = 0; i < SIZE; ++i) {
699		assertEquals(l.get(i), i);
700		}
701	<	t.join();
701	>	awaitTermination(t, MEDIUM_DELAY_MS);
702		assertTrue(q.size() + l.size() >= SIZE);
703		}
704
705		/**
706	<	* drainTo(null, n) throws NullPointerException
812	<	*/
813	<	public void testDrainToNullN() {
814	<	LinkedTransferQueue q = populatedQueue(SIZE);
815	<	try {
816	<	q.drainTo(null, SIZE);
817	<	shouldThrow();
818	<	} catch (NullPointerException success) {
819	<	}
820	<	}
821	<
822	<	/**
823	<	* drainTo(this, n) throws IllegalArgumentException
824	<	*/
825	<	public void testDrainToSelfN() {
826	<	LinkedTransferQueue q = populatedQueue(SIZE);
827	<	try {
828	<	q.drainTo(q, SIZE);
829	<	shouldThrow();
830	<	} catch (IllegalArgumentException success) {
831	<	}
832	<	}
833	<
834	<	/**
835	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
706	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
707		*/
708		public void testDrainToN() {
709		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 861 | Line 732 | public class LinkedTransferQueueTest ext
732		final LinkedTransferQueue q = new LinkedTransferQueue();
733		assertEquals(q.getWaitingConsumerCount(), 0);
734		assertFalse(q.hasWaitingConsumer());
735	+	final CountDownLatch threadStarted = new CountDownLatch(1);
736
737		Thread t = newStartedThread(new CheckedRunnable() {
738	<	void realRun() throws InterruptedException {
739	<	Thread.sleep(SMALL_DELAY_MS);
740	<	threadAssertTrue(q.hasWaitingConsumer());
741	<	threadAssertEquals(q.getWaitingConsumerCount(), 1);
742	<	threadAssertTrue(q.offer(new Object()));
871	<	threadAssertFalse(q.hasWaitingConsumer());
872	<	threadAssertEquals(q.getWaitingConsumerCount(), 0);
738	>	public void realRun() throws InterruptedException {
739	>	threadStarted.countDown();
740	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
741	>	assertEquals(q.getWaitingConsumerCount(), 0);
742	>	assertFalse(q.hasWaitingConsumer());
743		}});
744
745	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) != null);
745	>	threadStarted.await();
746	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
747	>	assertEquals(q.getWaitingConsumerCount(), 1);
748	>	assertTrue(q.hasWaitingConsumer());
749	>
750	>	assertTrue(q.offer(one));
751		assertEquals(q.getWaitingConsumerCount(), 0);
752		assertFalse(q.hasWaitingConsumer());
753	<	t.join();
753	>
754	>	awaitTermination(t, MEDIUM_DELAY_MS);
755		}
756
757		/**
#	Line 896 | Line 772 | public class LinkedTransferQueueTest ext
772		public void testTransfer2() throws InterruptedException {
773		final LinkedTransferQueue<Integer> q
774		= new LinkedTransferQueue<Integer>();
775	+	final CountDownLatch threadStarted = new CountDownLatch(1);
776
777		Thread t = newStartedThread(new CheckedRunnable() {
778	<	void realRun() throws InterruptedException {
779	<	q.transfer(SIZE);
780	<	threadAssertTrue(q.isEmpty());
778	>	public void realRun() throws InterruptedException {
779	>	threadStarted.countDown();
780	>	q.transfer(five);
781	>	checkEmpty(q);
782		}});
783
784	<	Thread.sleep(SHORT_DELAY_MS);
784	>	threadStarted.await();
785	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
786		assertEquals(1, q.size());
787	<	assertEquals(SIZE, (int) q.poll());
788	<	assertTrue(q.isEmpty());
789	<	t.join();
787	>	assertSame(five, q.poll());
788	>	checkEmpty(q);
789	>	awaitTermination(t, MEDIUM_DELAY_MS);
790		}
791
792		/**
#	Line 918 | Line 797 | public class LinkedTransferQueueTest ext
797		= new LinkedTransferQueue<Integer>();
798
799		Thread first = newStartedThread(new CheckedRunnable() {
800	<	void realRun() throws InterruptedException {
801	<	Integer i = SIZE + 1;
802	<	q.transfer(i);
803	<	threadAssertTrue(!q.contains(i));
925	<	threadAssertEquals(1, q.size());
800	>	public void realRun() throws InterruptedException {
801	>	q.transfer(four);
802	>	assertTrue(!q.contains(four));
803	>	assertEquals(1, q.size());
804		}});
805
806		Thread interruptedThread = newStartedThread(
807		new CheckedInterruptedRunnable() {
808	<	void realRun() throws InterruptedException {
809	<	while (q.size() == 0)
808	>	public void realRun() throws InterruptedException {
809	>	while (q.isEmpty())
810		Thread.yield();
811	<	q.transfer(SIZE);
811	>	q.transfer(five);
812		}});
813
814		while (q.size() < 2)
815		Thread.yield();
816		assertEquals(2, q.size());
817	<	assertEquals(SIZE + 1, (int) q.poll());
817	>	assertSame(four, q.poll());
818		first.join();
819		assertEquals(1, q.size());
820		interruptedThread.interrupt();
821		interruptedThread.join();
822	<	assertEquals(0, q.size());
945	<	assertTrue(q.isEmpty());
822	>	checkEmpty(q);
823		}
824
825		/**
#	Line 953 | Line 830 | public class LinkedTransferQueueTest ext
830		final LinkedTransferQueue q = new LinkedTransferQueue();
831
832		Thread t = newStartedThread(new CheckedRunnable() {
833	<	void realRun() throws InterruptedException {
833	>	public void realRun() throws InterruptedException {
834		q.transfer(four);
835	<	threadAssertFalse(q.contains(four));
836	<	threadAssertEquals(three, q.poll());
835	>	assertFalse(q.contains(four));
836	>	assertSame(three, q.poll());
837		}});
838
839	<	Thread.sleep(SHORT_DELAY_MS);
839	>	while (q.isEmpty())
840	>	Thread.yield();
841	>	assertFalse(q.isEmpty());
842	>	assertEquals(1, q.size());
843		assertTrue(q.offer(three));
844	<	assertEquals(four, q.poll());
845	<	t.join();
844	>	assertSame(four, q.poll());
845	>	awaitTermination(t, MEDIUM_DELAY_MS);
846		}
847
848		/**
#	Line 974 | Line 854 | public class LinkedTransferQueueTest ext
854		= new LinkedTransferQueue<Integer>();
855
856		Thread t = newStartedThread(new CheckedRunnable() {
857	<	void realRun() throws InterruptedException {
858	<	q.transfer(SIZE);
857	>	public void realRun() throws InterruptedException {
858	>	q.transfer(four);
859		checkEmpty(q);
860		}});
861
862	<	Thread.sleep(SHORT_DELAY_MS);
863	<	assertEquals(SIZE, (int) q.take());
862	>	while (q.isEmpty())
863	>	Thread.yield();
864	>	assertFalse(q.isEmpty());
865	>	assertEquals(1, q.size());
866	>	assertSame(four, q.take());
867		checkEmpty(q);
868	<	t.join();
868	>	awaitTermination(t, MEDIUM_DELAY_MS);
869		}
870
871		/**
#	Line 1016 | Line 899 | public class LinkedTransferQueueTest ext
899		final LinkedTransferQueue q = new LinkedTransferQueue();
900
901		Thread t = newStartedThread(new CheckedRunnable() {
902	<	void realRun() {
902	>	public void realRun() {
903		while (! q.hasWaitingConsumer())
904		Thread.yield();
905	<	threadAssertTrue(q.hasWaitingConsumer());
906	<	threadAssertTrue(q.isEmpty());
907	<	threadAssertTrue(q.size() == 0);
1025	<	threadAssertTrue(q.tryTransfer(hotPotato));
905	>	assertTrue(q.hasWaitingConsumer());
906	>	checkEmpty(q);
907	>	assertTrue(q.tryTransfer(hotPotato));
908		}});
909
910	<	assertTrue(q.poll(MEDIUM_DELAY_MS, MILLISECONDS) == hotPotato);
910	>	assertSame(hotPotato, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
911		checkEmpty(q);
912	<	t.join();
912	>	awaitTermination(t, MEDIUM_DELAY_MS);
913		}
914
915		/**
#	Line 1039 | Line 921 | public class LinkedTransferQueueTest ext
921		final LinkedTransferQueue q = new LinkedTransferQueue();
922
923		Thread t = newStartedThread(new CheckedRunnable() {
924	<	void realRun() {
924	>	public void realRun() {
925		while (! q.hasWaitingConsumer())
926		Thread.yield();
927	<	threadAssertTrue(q.hasWaitingConsumer());
928	<	threadAssertTrue(q.isEmpty());
929	<	threadAssertTrue(q.size() == 0);
1048	<	threadAssertTrue(q.tryTransfer(hotPotato));
927	>	assertTrue(q.hasWaitingConsumer());
928	>	checkEmpty(q);
929	>	assertTrue(q.tryTransfer(hotPotato));
930		}});
931
932	<	assertTrue(q.take() == hotPotato);
932	>	assertSame(q.take(), hotPotato);
933		checkEmpty(q);
934	<	t.join();
934	>	awaitTermination(t, MEDIUM_DELAY_MS);
935		}
936
937		/**
938	<	* tryTransfer waits the amount given if interrupted, and
1058	<	* throws interrupted exception
938	>	* tryTransfer blocks interruptibly if no takers
939		*/
940		public void testTryTransfer5() throws InterruptedException {
941		final LinkedTransferQueue q = new LinkedTransferQueue();
942	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
943	+	assertTrue(q.isEmpty());
944
945	<	Thread toInterrupt = newStartedThread(new CheckedInterruptedRunnable() {
946	<	void realRun() throws InterruptedException {
947	<	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
945	>	Thread t = newStartedThread(new CheckedRunnable() {
946	>	public void realRun() throws InterruptedException {
947	>	Thread.currentThread().interrupt();
948	>	try {
949	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
950	>	shouldThrow();
951	>	} catch (InterruptedException success) {}
952	>	assertFalse(Thread.interrupted());
953	>
954	>	pleaseInterrupt.countDown();
955	>	try {
956	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
957	>	shouldThrow();
958	>	} catch (InterruptedException success) {}
959	>	assertFalse(Thread.interrupted());
960		}});
961
962	<	Thread.sleep(SMALL_DELAY_MS);
963	<	toInterrupt.interrupt();
964	<	toInterrupt.join();
962	>	await(pleaseInterrupt);
963	>	assertThreadStaysAlive(t);
964	>	t.interrupt();
965	>	awaitTermination(t);
966	>	checkEmpty(q);
967		}
968
969		/**
970	<	* tryTransfer gives up after the timeout and return false
970	>	* tryTransfer gives up after the timeout and returns false
971		*/
972		public void testTryTransfer6() throws InterruptedException {
973		final LinkedTransferQueue q = new LinkedTransferQueue();
974
975		Thread t = newStartedThread(new CheckedRunnable() {
976	<	void realRun() throws InterruptedException {
977	<	threadAssertFalse
978	<	(q.tryTransfer(new Object(),
979	<	SHORT_DELAY_MS, MILLISECONDS));
976	>	public void realRun() throws InterruptedException {
977	>	long t0 = System.nanoTime();
978	>	assertFalse(q.tryTransfer(new Object(),
979	>	timeoutMillis(), MILLISECONDS));
980	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
981	>	checkEmpty(q);
982		}});
983
984	<	Thread.sleep(SMALL_DELAY_MS);
984	>	awaitTermination(t);
985		checkEmpty(q);
1088	–	t.join();
986		}
987
988		/**
#	Line 1097 | Line 994 | public class LinkedTransferQueueTest ext
994		assertTrue(q.offer(four));
995
996		Thread t = newStartedThread(new CheckedRunnable() {
997	<	void realRun() throws InterruptedException {
998	<	threadAssertTrue(q.tryTransfer(five,
999	<	MEDIUM_DELAY_MS, MILLISECONDS));
1103	<	threadAssertTrue(q.isEmpty());
997	>	public void realRun() throws InterruptedException {
998	>	assertTrue(q.tryTransfer(five, MEDIUM_DELAY_MS, MILLISECONDS));
999	>	checkEmpty(q);
1000		}});
1001
1002	<	Thread.sleep(SHORT_DELAY_MS);
1002	>	while (q.size() != 2)
1003	>	Thread.yield();
1004		assertEquals(2, q.size());
1005	<	assertEquals(four, q.poll());
1006	<	assertEquals(five, q.poll());
1005	>	assertSame(four, q.poll());
1006	>	assertSame(five, q.poll());
1007		checkEmpty(q);
1008	<	t.join();
1008	>	awaitTermination(t, MEDIUM_DELAY_MS);
1009		}
1010
1011		/**
1012	<	* tryTransfer attempts to enqueue into the q and fails returning
1013	<	* false not enqueueing and the successive poll is null
1012	>	* tryTransfer attempts to enqueue into the queue and fails
1013	>	* returning false not enqueueing and the successive poll is null
1014		*/
1015		public void testTryTransfer8() throws InterruptedException {
1016		final LinkedTransferQueue q = new LinkedTransferQueue();
1017		assertTrue(q.offer(four));
1018		assertEquals(1, q.size());
1019	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
1019	>	long t0 = System.nanoTime();
1020	>	assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
1021	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
1022		assertEquals(1, q.size());
1023	<	assertEquals(four, q.poll());
1023	>	assertSame(four, q.poll());
1024		assertNull(q.poll());
1025		checkEmpty(q);
1026		}
1027
1028		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1029		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1030	<	assertTrue(q.isEmpty());
1030	>	checkEmpty(q);
1031		for (int i = 0; i < n; i++) {
1032		assertEquals(i, q.size());
1033		assertTrue(q.offer(i));

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