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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 1.60 by jsr166, Fri May 15 18:21:19 2015 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;
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.concurrent.*;
17	<	import static java.util.concurrent.TimeUnit.MILLISECONDS;
16	>	import java.util.Queue;
17	>	import java.util.concurrent.BlockingQueue;
18	>	import java.util.concurrent.CountDownLatch;
19	>	import java.util.concurrent.Executors;
20	>	import java.util.concurrent.ExecutorService;
21	>	import java.util.concurrent.LinkedTransferQueue;
22	>
23		import junit.framework.Test;
22	–	import junit.framework.TestSuite;
24
25		@SuppressWarnings({"unchecked", "rawtypes"})
26		public class LinkedTransferQueueTest extends JSR166TestCase {
27
28	<	public static void main(String[] args) {
29	<	junit.textui.TestRunner.run(suite());
28	>	public static class Generic extends BlockingQueueTest {
29	>	protected BlockingQueue emptyCollection() {
30	>	return new LinkedTransferQueue();
31	>	}
32		}
33
34	<	public static Test suite() {
35	<	return new TestSuite(LinkedTransferQueueTest.class);
34	>	public static void main(String[] args) {
35	>	main(suite(), args);
36		}
37
38	<	void checkEmpty(LinkedTransferQueue q) throws InterruptedException {
39	<	assertTrue(q.isEmpty());
40	<	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	>	public static Test suite() {
39	>	return newTestSuite(LinkedTransferQueueTest.class,
40	>	new Generic().testSuite());
41		}
42
43		/**
#	Line 80 | Line 65 | public class LinkedTransferQueueTest ext
65		* NullPointerException
66		*/
67		public void testConstructor3() {
68	+	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
69		try {
70	<	Integer[] ints = new Integer[SIZE];
85	<	new LinkedTransferQueue(Arrays.asList(ints));
70	>	new LinkedTransferQueue(elements);
71		shouldThrow();
72		} catch (NullPointerException success) {}
73		}
#	Line 92 | Line 77 | public class LinkedTransferQueueTest ext
77		* throws NullPointerException
78		*/
79		public void testConstructor4() {
80	+	Integer[] ints = new Integer[SIZE];
81	+	for (int i = 0; i < SIZE-1; ++i)
82	+	ints[i] = i;
83	+	Collection<Integer> elements = Arrays.asList(ints);
84		try {
85	<	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));
85	>	new LinkedTransferQueue(elements);
86		shouldThrow();
87		} catch (NullPointerException success) {}
88		}
#	Line 130 | Line 115 | public class LinkedTransferQueueTest ext
115		* remainingCapacity() always returns Integer.MAX_VALUE
116		*/
117		public void testRemainingCapacity() {
118	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
118	>	BlockingQueue q = populatedQueue(SIZE);
119		for (int i = 0; i < SIZE; ++i) {
120		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
121		assertEquals(SIZE - i, q.size());
122	<	q.remove();
122	>	assertEquals(i, q.remove());
123		}
124		for (int i = 0; i < SIZE; ++i) {
125		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
126		assertEquals(i, q.size());
127	<	q.add(i);
127	>	assertTrue(q.add(i));
128		}
129		}
130
131		/**
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	–	/**
132		* addAll(this) throws IllegalArgumentException
133		*/
134		public void testAddAllSelf() {
135	+	LinkedTransferQueue q = populatedQueue(SIZE);
136		try {
184	–	LinkedTransferQueue q = populatedQueue(SIZE);
137		q.addAll(q);
138		shouldThrow();
139		} catch (IllegalArgumentException success) {}
140		}
141
142		/**
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	–	/**
143		* addAll of a collection with any null elements throws
144		* NullPointerException after possibly adding some elements
145		*/
146		public void testAddAll3() {
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		try {
208	–	LinkedTransferQueue q = new LinkedTransferQueue();
209	–	Integer[] ints = new Integer[SIZE];
210	–	for (int i = 0; i < SIZE - 1; ++i) {
211	–	ints[i] = i;
212	–	}
152		q.addAll(Arrays.asList(ints));
153		shouldThrow();
154		} catch (NullPointerException success) {}
#	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() {
178		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
179		for (int i = 0; i < SIZE; ++i) {
180	<	assertEquals(q.size(), i);
180	>	assertEquals(i, q.size());
181		q.put(i);
182		assertTrue(q.contains(i));
183		}
#	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 588 | Line 499 | public class LinkedTransferQueueTest ext
499		public void testIterator() throws InterruptedException {
500		LinkedTransferQueue q = populatedQueue(SIZE);
501		Iterator it = q.iterator();
502	<	int i = 0;
503	<	while (it.hasNext()) {
504	<	assertEquals(it.next(), i++);
594	<	}
502	>	int i;
503	>	for (i = 0; it.hasNext(); i++)
504	>	assertTrue(q.contains(it.next()));
505		assertEquals(i, SIZE);
506	+	assertIteratorExhausted(it);
507	+
508	+	it = q.iterator();
509	+	for (i = 0; it.hasNext(); i++)
510	+	assertEquals(it.next(), q.take());
511	+	assertEquals(i, SIZE);
512	+	assertIteratorExhausted(it);
513	+	}
514	+
515	+	/**
516	+	* iterator of empty collection has no elements
517	+	*/
518	+	public void testEmptyIterator() {
519	+	assertIteratorExhausted(new LinkedTransferQueue().iterator());
520		}
521
522		/**
#	Line 609 | Line 533 | public class LinkedTransferQueueTest ext
533		it.remove();
534
535		it = q.iterator();
536	<	assertEquals(it.next(), one);
537	<	assertEquals(it.next(), three);
536	>	assertSame(it.next(), one);
537	>	assertSame(it.next(), three);
538		assertFalse(it.hasNext());
539		}
540
#	Line 654 | Line 578 | public class LinkedTransferQueueTest ext
578		LinkedTransferQueue q = populatedQueue(SIZE);
579		String s = q.toString();
580		for (int i = 0; i < SIZE; ++i) {
581	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
581	>	assertTrue(s.contains(String.valueOf(i)));
582		}
583		}
584
#	Line 663 | Line 587 | public class LinkedTransferQueueTest ext
587		*/
588		public void testOfferInExecutor() {
589		final LinkedTransferQueue q = new LinkedTransferQueue();
590	<	q.add(one);
667	<	q.add(two);
590	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
591		ExecutorService executor = Executors.newFixedThreadPool(2);
592
593		executor.execute(new CheckedRunnable() {
594	<	void realRun() {
595	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS,
596	<	MILLISECONDS));
594	>	public void realRun() throws InterruptedException {
595	>	threadsStarted.await();
596	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
597		}});
598
599		executor.execute(new CheckedRunnable() {
600	<	void realRun() throws InterruptedException {
601	<	Thread.sleep(SMALL_DELAY_MS);
602	<	threadAssertEquals(one, q.take());
600	>	public void realRun() throws InterruptedException {
601	>	threadsStarted.await();
602	>	assertSame(one, q.take());
603	>	checkEmpty(q);
604		}});
605
606		joinPool(executor);
#	Line 687 | Line 611 | public class LinkedTransferQueueTest ext
611		*/
612		public void testPollInExecutor() {
613		final LinkedTransferQueue q = new LinkedTransferQueue();
614	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
615		ExecutorService executor = Executors.newFixedThreadPool(2);
616
617		executor.execute(new CheckedRunnable() {
618	<	void realRun() throws InterruptedException {
619	<	threadAssertNull(q.poll());
620	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS,
621	<	MILLISECONDS));
622	<	threadAssertTrue(q.isEmpty());
618	>	public void realRun() throws InterruptedException {
619	>	assertNull(q.poll());
620	>	threadsStarted.await();
621	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
622	>	checkEmpty(q);
623		}});
624
625		executor.execute(new CheckedRunnable() {
626	<	void realRun() throws InterruptedException {
627	<	Thread.sleep(SMALL_DELAY_MS);
626	>	public void realRun() throws InterruptedException {
627	>	threadsStarted.await();
628		q.put(one);
629		}});
630
#	Line 710 | Line 635 | public class LinkedTransferQueueTest ext
635		* A deserialized serialized queue has same elements in same order
636		*/
637		public void testSerialization() throws Exception {
638	<	LinkedTransferQueue q = populatedQueue(SIZE);
639	<
715	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
716	<	ObjectOutputStream out
717	<	= new ObjectOutputStream(new BufferedOutputStream(bout));
718	<	out.writeObject(q);
719	<	out.close();
720	<
721	<	ByteArrayInputStream bin
722	<	= new ByteArrayInputStream(bout.toByteArray());
723	<	ObjectInputStream in
724	<	= new ObjectInputStream(new BufferedInputStream(bin));
725	<	LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
638	>	Queue x = populatedQueue(SIZE);
639	>	Queue y = serialClone(x);
640
641	<	assertEquals(q.size(), r.size());
642	<	while (!q.isEmpty()) {
643	<	assertEquals(q.remove(), r.remove());
641	>	assertNotSame(y, x);
642	>	assertEquals(x.size(), y.size());
643	>	assertEquals(x.toString(), y.toString());
644	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
645	>	while (!x.isEmpty()) {
646	>	assertFalse(y.isEmpty());
647	>	assertEquals(x.remove(), y.remove());
648		}
649	<	}
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) {}
649	>	assertTrue(y.isEmpty());
650		}
651
652		/**
#	Line 759 | Line 656 | public class LinkedTransferQueueTest ext
656		LinkedTransferQueue q = populatedQueue(SIZE);
657		ArrayList l = new ArrayList();
658		q.drainTo(l);
659	<	assertEquals(q.size(), 0);
660	<	assertEquals(l.size(), SIZE);
659	>	assertEquals(0, q.size());
660	>	assertEquals(SIZE, l.size());
661		for (int i = 0; i < SIZE; ++i) {
662	<	assertEquals(l.get(i), i);
662	>	assertEquals(i, l.get(i));
663		}
664		q.add(zero);
665		q.add(one);
#	Line 771 | Line 668 | public class LinkedTransferQueueTest ext
668		assertTrue(q.contains(one));
669		l.clear();
670		q.drainTo(l);
671	<	assertEquals(q.size(), 0);
672	<	assertEquals(l.size(), 2);
671	>	assertEquals(0, q.size());
672	>	assertEquals(2, l.size());
673		for (int i = 0; i < 2; ++i) {
674	<	assertEquals(l.get(i), i);
674	>	assertEquals(i, l.get(i));
675		}
676		}
677
#	Line 784 | Line 681 | public class LinkedTransferQueueTest ext
681		public void testDrainToWithActivePut() throws InterruptedException {
682		final LinkedTransferQueue q = populatedQueue(SIZE);
683		Thread t = newStartedThread(new CheckedRunnable() {
684	<	void realRun() {
684	>	public void realRun() {
685		q.put(SIZE + 1);
686		}});
687		ArrayList l = new ArrayList();
688		q.drainTo(l);
689		assertTrue(l.size() >= SIZE);
690	<	for (int i = 0; i < SIZE; ++i) {
691	<	assertEquals(l.get(i), i);
692	<	}
796	<	t.join();
690	>	for (int i = 0; i < SIZE; ++i)
691	>	assertEquals(i, l.get(i));
692	>	awaitTermination(t, MEDIUM_DELAY_MS);
693		assertTrue(q.size() + l.size() >= SIZE);
694		}
695
696		/**
697	<	* 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
697	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
698		*/
699		public void testDrainToN() {
700		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 831 | Line 705 | public class LinkedTransferQueueTest ext
705		ArrayList l = new ArrayList();
706		q.drainTo(l, i);
707		int k = (i < SIZE) ? i : SIZE;
708	<	assertEquals(l.size(), k);
709	<	assertEquals(q.size(), SIZE - k);
710	<	for (int j = 0; j < k; ++j) {
711	<	assertEquals(l.get(j), j);
712	<	}
839	<	while (q.poll() != null)
840	<	;
708	>	assertEquals(k, l.size());
709	>	assertEquals(SIZE - k, q.size());
710	>	for (int j = 0; j < k; ++j)
711	>	assertEquals(j, l.get(j));
712	>	do {} while (q.poll() != null);
713		}
714		}
715
#	Line 847 | Line 719 | public class LinkedTransferQueueTest ext
719		*/
720		public void testWaitingConsumer() throws InterruptedException {
721		final LinkedTransferQueue q = new LinkedTransferQueue();
722	<	assertEquals(q.getWaitingConsumerCount(), 0);
722	>	assertEquals(0, q.getWaitingConsumerCount());
723		assertFalse(q.hasWaitingConsumer());
724	+	final CountDownLatch threadStarted = new CountDownLatch(1);
725
726		Thread t = newStartedThread(new CheckedRunnable() {
727	<	void realRun() throws InterruptedException {
728	<	Thread.sleep(SMALL_DELAY_MS);
729	<	threadAssertTrue(q.hasWaitingConsumer());
730	<	threadAssertEquals(q.getWaitingConsumerCount(), 1);
731	<	threadAssertTrue(q.offer(new Object()));
859	<	threadAssertFalse(q.hasWaitingConsumer());
860	<	threadAssertEquals(q.getWaitingConsumerCount(), 0);
727	>	public void realRun() throws InterruptedException {
728	>	threadStarted.countDown();
729	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
730	>	assertEquals(0, q.getWaitingConsumerCount());
731	>	assertFalse(q.hasWaitingConsumer());
732		}});
733
734	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) != null);
735	<	assertEquals(q.getWaitingConsumerCount(), 0);
734	>	threadStarted.await();
735	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
736	>	assertEquals(1, q.getWaitingConsumerCount());
737	>	assertTrue(q.hasWaitingConsumer());
738	>
739	>	assertTrue(q.offer(one));
740	>	assertEquals(0, q.getWaitingConsumerCount());
741		assertFalse(q.hasWaitingConsumer());
742	<	t.join();
742	>
743	>	awaitTermination(t, MEDIUM_DELAY_MS);
744		}
745
746		/**
#	Line 884 | Line 761 | public class LinkedTransferQueueTest ext
761		public void testTransfer2() throws InterruptedException {
762		final LinkedTransferQueue<Integer> q
763		= new LinkedTransferQueue<Integer>();
764	+	final CountDownLatch threadStarted = new CountDownLatch(1);
765
766		Thread t = newStartedThread(new CheckedRunnable() {
767	<	void realRun() throws InterruptedException {
768	<	q.transfer(SIZE);
769	<	threadAssertTrue(q.isEmpty());
767	>	public void realRun() throws InterruptedException {
768	>	threadStarted.countDown();
769	>	q.transfer(five);
770	>	checkEmpty(q);
771		}});
772
773	<	Thread.sleep(SHORT_DELAY_MS);
773	>	threadStarted.await();
774	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
775		assertEquals(1, q.size());
776	<	assertEquals(SIZE, (int) q.poll());
777	<	assertTrue(q.isEmpty());
778	<	t.join();
776	>	assertSame(five, q.poll());
777	>	checkEmpty(q);
778	>	awaitTermination(t, MEDIUM_DELAY_MS);
779		}
780
781		/**
#	Line 906 | Line 786 | public class LinkedTransferQueueTest ext
786		= new LinkedTransferQueue<Integer>();
787
788		Thread first = newStartedThread(new CheckedRunnable() {
789	<	void realRun() throws InterruptedException {
790	<	Integer i = SIZE + 1;
791	<	q.transfer(i);
792	<	threadAssertTrue(!q.contains(i));
913	<	threadAssertEquals(1, q.size());
789	>	public void realRun() throws InterruptedException {
790	>	q.transfer(four);
791	>	assertTrue(!q.contains(four));
792	>	assertEquals(1, q.size());
793		}});
794
795		Thread interruptedThread = newStartedThread(
796		new CheckedInterruptedRunnable() {
797	<	void realRun() throws InterruptedException {
798	<	while (q.size() == 0)
797	>	public void realRun() throws InterruptedException {
798	>	while (q.isEmpty())
799		Thread.yield();
800	<	q.transfer(SIZE);
800	>	q.transfer(five);
801		}});
802
803		while (q.size() < 2)
804		Thread.yield();
805		assertEquals(2, q.size());
806	<	assertEquals(SIZE + 1, (int) q.poll());
806	>	assertSame(four, q.poll());
807		first.join();
808		assertEquals(1, q.size());
809		interruptedThread.interrupt();
810		interruptedThread.join();
811	<	assertEquals(0, q.size());
933	<	assertTrue(q.isEmpty());
811	>	checkEmpty(q);
812		}
813
814		/**
#	Line 941 | Line 819 | public class LinkedTransferQueueTest ext
819		final LinkedTransferQueue q = new LinkedTransferQueue();
820
821		Thread t = newStartedThread(new CheckedRunnable() {
822	<	void realRun() throws InterruptedException {
822	>	public void realRun() throws InterruptedException {
823		q.transfer(four);
824	<	threadAssertFalse(q.contains(four));
825	<	threadAssertEquals(three, q.poll());
824	>	assertFalse(q.contains(four));
825	>	assertSame(three, q.poll());
826		}});
827
828	<	Thread.sleep(SHORT_DELAY_MS);
828	>	while (q.isEmpty())
829	>	Thread.yield();
830	>	assertFalse(q.isEmpty());
831	>	assertEquals(1, q.size());
832		assertTrue(q.offer(three));
833	<	assertEquals(four, q.poll());
834	<	t.join();
833	>	assertSame(four, q.poll());
834	>	awaitTermination(t, MEDIUM_DELAY_MS);
835		}
836
837		/**
#	Line 962 | Line 843 | public class LinkedTransferQueueTest ext
843		= new LinkedTransferQueue<Integer>();
844
845		Thread t = newStartedThread(new CheckedRunnable() {
846	<	void realRun() throws InterruptedException {
847	<	q.transfer(SIZE);
846	>	public void realRun() throws InterruptedException {
847	>	q.transfer(four);
848		checkEmpty(q);
849		}});
850
851	<	Thread.sleep(SHORT_DELAY_MS);
852	<	assertEquals(SIZE, (int) q.take());
851	>	while (q.isEmpty())
852	>	Thread.yield();
853	>	assertFalse(q.isEmpty());
854	>	assertEquals(1, q.size());
855	>	assertSame(four, q.take());
856		checkEmpty(q);
857	<	t.join();
857	>	awaitTermination(t, MEDIUM_DELAY_MS);
858		}
859
860		/**
861		* tryTransfer(null) throws NullPointerException
862		*/
863		public void testTryTransfer1() {
864	+	final LinkedTransferQueue q = new LinkedTransferQueue();
865		try {
981	–	final LinkedTransferQueue q = new LinkedTransferQueue();
866		q.tryTransfer(null);
867		shouldThrow();
868		} catch (NullPointerException success) {}
#	Line 1004 | Line 888 | public class LinkedTransferQueueTest ext
888		final LinkedTransferQueue q = new LinkedTransferQueue();
889
890		Thread t = newStartedThread(new CheckedRunnable() {
891	<	void realRun() {
891	>	public void realRun() {
892		while (! q.hasWaitingConsumer())
893		Thread.yield();
894	<	threadAssertTrue(q.hasWaitingConsumer());
895	<	threadAssertTrue(q.isEmpty());
896	<	threadAssertTrue(q.size() == 0);
1013	<	threadAssertTrue(q.tryTransfer(hotPotato));
894	>	assertTrue(q.hasWaitingConsumer());
895	>	checkEmpty(q);
896	>	assertTrue(q.tryTransfer(hotPotato));
897		}});
898
899	<	assertTrue(q.poll(MEDIUM_DELAY_MS, MILLISECONDS) == hotPotato);
899	>	assertSame(hotPotato, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
900		checkEmpty(q);
901	<	t.join();
901	>	awaitTermination(t, MEDIUM_DELAY_MS);
902		}
903
904		/**
#	Line 1027 | Line 910 | public class LinkedTransferQueueTest ext
910		final LinkedTransferQueue q = new LinkedTransferQueue();
911
912		Thread t = newStartedThread(new CheckedRunnable() {
913	<	void realRun() {
913	>	public void realRun() {
914		while (! q.hasWaitingConsumer())
915		Thread.yield();
916	<	threadAssertTrue(q.hasWaitingConsumer());
917	<	threadAssertTrue(q.isEmpty());
918	<	threadAssertTrue(q.size() == 0);
1036	<	threadAssertTrue(q.tryTransfer(hotPotato));
916	>	assertTrue(q.hasWaitingConsumer());
917	>	checkEmpty(q);
918	>	assertTrue(q.tryTransfer(hotPotato));
919		}});
920
921	<	assertTrue(q.take() == hotPotato);
921	>	assertSame(q.take(), hotPotato);
922		checkEmpty(q);
923	<	t.join();
923	>	awaitTermination(t, MEDIUM_DELAY_MS);
924		}
925
926		/**
927	<	* tryTransfer waits the amount given if interrupted, and
1046	<	* throws interrupted exception
927	>	* tryTransfer blocks interruptibly if no takers
928		*/
929		public void testTryTransfer5() throws InterruptedException {
930		final LinkedTransferQueue q = new LinkedTransferQueue();
931	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
932	+	assertTrue(q.isEmpty());
933
934	<	Thread toInterrupt = newStartedThread(new CheckedInterruptedRunnable() {
935	<	void realRun() throws InterruptedException {
936	<	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
934	>	Thread t = newStartedThread(new CheckedRunnable() {
935	>	public void realRun() throws InterruptedException {
936	>	Thread.currentThread().interrupt();
937	>	try {
938	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
939	>	shouldThrow();
940	>	} catch (InterruptedException success) {}
941	>	assertFalse(Thread.interrupted());
942	>
943	>	pleaseInterrupt.countDown();
944	>	try {
945	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
946	>	shouldThrow();
947	>	} catch (InterruptedException success) {}
948	>	assertFalse(Thread.interrupted());
949		}});
950
951	<	Thread.sleep(SMALL_DELAY_MS);
952	<	toInterrupt.interrupt();
953	<	toInterrupt.join();
951	>	await(pleaseInterrupt);
952	>	assertThreadStaysAlive(t);
953	>	t.interrupt();
954	>	awaitTermination(t);
955	>	checkEmpty(q);
956		}
957
958		/**
959	<	* tryTransfer gives up after the timeout and return false
959	>	* tryTransfer gives up after the timeout and returns false
960		*/
961		public void testTryTransfer6() throws InterruptedException {
962		final LinkedTransferQueue q = new LinkedTransferQueue();
963
964		Thread t = newStartedThread(new CheckedRunnable() {
965	<	void realRun() throws InterruptedException {
966	<	threadAssertFalse
967	<	(q.tryTransfer(new Object(),
968	<	SHORT_DELAY_MS, MILLISECONDS));
965	>	public void realRun() throws InterruptedException {
966	>	long t0 = System.nanoTime();
967	>	assertFalse(q.tryTransfer(new Object(),
968	>	timeoutMillis(), MILLISECONDS));
969	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
970	>	checkEmpty(q);
971		}});
972
973	<	Thread.sleep(SMALL_DELAY_MS);
973	>	awaitTermination(t);
974		checkEmpty(q);
1076	–	t.join();
975		}
976
977		/**
#	Line 1085 | Line 983 | public class LinkedTransferQueueTest ext
983		assertTrue(q.offer(four));
984
985		Thread t = newStartedThread(new CheckedRunnable() {
986	<	void realRun() throws InterruptedException {
987	<	threadAssertTrue(q.tryTransfer(five,
988	<	MEDIUM_DELAY_MS, MILLISECONDS));
1091	<	threadAssertTrue(q.isEmpty());
986	>	public void realRun() throws InterruptedException {
987	>	assertTrue(q.tryTransfer(five, MEDIUM_DELAY_MS, MILLISECONDS));
988	>	checkEmpty(q);
989		}});
990
991	<	Thread.sleep(SHORT_DELAY_MS);
991	>	while (q.size() != 2)
992	>	Thread.yield();
993		assertEquals(2, q.size());
994	<	assertEquals(four, q.poll());
995	<	assertEquals(five, q.poll());
994	>	assertSame(four, q.poll());
995	>	assertSame(five, q.poll());
996		checkEmpty(q);
997	<	t.join();
997	>	awaitTermination(t, MEDIUM_DELAY_MS);
998		}
999
1000		/**
1001	<	* tryTransfer attempts to enqueue into the q and fails returning
1002	<	* false not enqueueing and the successive poll is null
1001	>	* tryTransfer attempts to enqueue into the queue and fails
1002	>	* returning false not enqueueing and the successive poll is null
1003		*/
1004		public void testTryTransfer8() throws InterruptedException {
1005		final LinkedTransferQueue q = new LinkedTransferQueue();
1006		assertTrue(q.offer(four));
1007		assertEquals(1, q.size());
1008	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
1008	>	long t0 = System.nanoTime();
1009	>	assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
1010	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
1011		assertEquals(1, q.size());
1012	<	assertEquals(four, q.poll());
1012	>	assertSame(four, q.poll());
1013		assertNull(q.poll());
1014		checkEmpty(q);
1015		}
1016
1017		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1018		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1019	<	assertTrue(q.isEmpty());
1019	>	checkEmpty(q);
1020		for (int i = 0; i < n; i++) {
1021		assertEquals(i, q.size());
1022		assertTrue(q.offer(i));
#	Line 1125 | Line 1025 | public class LinkedTransferQueueTest ext
1025		assertFalse(q.isEmpty());
1026		return q;
1027		}
1028	+
1029	+	/**
1030	+	* remove(null), contains(null) always return false
1031	+	*/
1032	+	public void testNeverContainsNull() {
1033	+	Collection<?>[] qs = {
1034	+	new LinkedTransferQueue<Object>(),
1035	+	populatedQueue(2),
1036	+	};
1037	+
1038	+	for (Collection<?> q : qs) {
1039	+	assertFalse(q.contains(null));
1040	+	assertFalse(q.remove(null));
1041	+	}
1042	+	}
1043		}

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