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

Comparing jsr166/src/test/tck/LinkedTransferQueueTest.java (file contents):
Revision 1.12 by jsr166, Sat Aug 15 00:35:01 2009 UTC vs.
Revision 1.77 by jsr166, Sun May 14 00:56:43 2017 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.ConcurrentModificationException;
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.Callable;
19	>	import java.util.concurrent.CountDownLatch;
20	>	import java.util.concurrent.Executors;
21	>	import java.util.concurrent.ExecutorService;
22	>	import java.util.concurrent.LinkedTransferQueue;
23	>
24		import junit.framework.Test;
23	–	import junit.framework.TestSuite;
25
26		@SuppressWarnings({"unchecked", "rawtypes"})
27		public class LinkedTransferQueueTest extends JSR166TestCase {
28	+	public static class Generic extends BlockingQueueTest {
29	+	protected BlockingQueue emptyCollection() {
30	+	return new LinkedTransferQueue();
31	+	}
32	+	}
33
34		public static void main(String[] args) {
35	<	junit.textui.TestRunner.run(suite());
35	>	main(suite(), args);
36		}
37
38		public static Test suite() {
39	<	return new TestSuite(LinkedTransferQueueTest.class);
40	<	}
41	<
42	<	void checkEmpty(LinkedTransferQueue q) throws InterruptedException {
43	<	assertTrue(q.isEmpty());
44	<	assertEquals(0, q.size());
45	<	assertNull(q.peek());
46	<	assertNull(q.poll());
47	<	assertNull(q.poll(0, MILLISECONDS));
48	<	assertEquals(q.toString(), "[]");
43	<	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
44	<	assertFalse(q.iterator().hasNext());
45	<	try {
46	<	q.element();
47	<	shouldThrow();
48	<	} catch (NoSuchElementException success) {
49	<	}
50	<	try {
51	<	q.iterator().next();
52	<	shouldThrow();
53	<	} catch (NoSuchElementException success) {
54	<	}
55	<	try {
56	<	q.remove();
57	<	shouldThrow();
58	<	} catch (NoSuchElementException success) {
59	<	}
39	>	class Implementation implements CollectionImplementation {
40	>	public Class<?> klazz() { return LinkedTransferQueue.class; }
41	>	public Collection emptyCollection() { return new LinkedTransferQueue(); }
42	>	public Object makeElement(int i) { return i; }
43	>	public boolean isConcurrent() { return true; }
44	>	public boolean permitsNulls() { return false; }
45	>	}
46	>	return newTestSuite(LinkedTransferQueueTest.class,
47	>	new Generic().testSuite(),
48	>	CollectionTest.testSuite(new Implementation()));
49		}
50
51		/**
#	Line 76 | Line 65 | public class LinkedTransferQueueTest ext
65		try {
66		new LinkedTransferQueue(null);
67		shouldThrow();
68	<	} catch (NullPointerException success) {
80	<	}
68	>	} catch (NullPointerException success) {}
69		}
70
71		/**
#	Line 85 | Line 73 | public class LinkedTransferQueueTest ext
73		* NullPointerException
74		*/
75		public void testConstructor3() {
76	+	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
77		try {
78	<	Integer[] ints = new Integer[SIZE];
90	<	new LinkedTransferQueue(Arrays.asList(ints));
78	>	new LinkedTransferQueue(elements);
79		shouldThrow();
80	<	} catch (NullPointerException success) {
93	<	}
80	>	} catch (NullPointerException success) {}
81		}
82
83		/**
#	Line 98 | Line 85 | public class LinkedTransferQueueTest ext
85		* throws NullPointerException
86		*/
87		public void testConstructor4() {
88	+	Integer[] ints = new Integer[SIZE];
89	+	for (int i = 0; i < SIZE - 1; ++i)
90	+	ints[i] = i;
91	+	Collection<Integer> elements = Arrays.asList(ints);
92		try {
93	<	Integer[] ints = new Integer[SIZE];
103	<	for (int i = 0; i < SIZE - 1; ++i) {
104	<	ints[i] = i;
105	<	}
106	<	new LinkedTransferQueue(Arrays.asList(ints));
93	>	new LinkedTransferQueue(elements);
94		shouldThrow();
95	<	} catch (NullPointerException success) {
109	<	}
95	>	} catch (NullPointerException success) {}
96		}
97
98		/**
#	Line 137 | Line 123 | public class LinkedTransferQueueTest ext
123		* remainingCapacity() always returns Integer.MAX_VALUE
124		*/
125		public void testRemainingCapacity() {
126	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
126	>	BlockingQueue q = populatedQueue(SIZE);
127		for (int i = 0; i < SIZE; ++i) {
128		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
129		assertEquals(SIZE - i, q.size());
130	<	q.remove();
130	>	assertEquals(i, q.remove());
131		}
132		for (int i = 0; i < SIZE; ++i) {
133		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
134		assertEquals(i, q.size());
135	<	q.add(i);
150	<	}
151	<	}
152	<
153	<	/**
154	<	* offer(null) throws NullPointerException
155	<	*/
156	<	public void testOfferNull() {
157	<	try {
158	<	LinkedTransferQueue q = new LinkedTransferQueue();
159	<	q.offer(null);
160	<	shouldThrow();
161	<	} catch (NullPointerException success) {
162	<	}
163	<	}
164	<
165	<	/**
166	<	* add(null) throws NullPointerException
167	<	*/
168	<	public void testAddNull() {
169	<	try {
170	<	LinkedTransferQueue q = new LinkedTransferQueue();
171	<	q.add(null);
172	<	shouldThrow();
173	<	} catch (NullPointerException success) {
174	<	}
175	<	}
176	<
177	<	/**
178	<	* addAll(null) throws NullPointerException
179	<	*/
180	<	public void testAddAll1() {
181	<	try {
182	<	LinkedTransferQueue q = new LinkedTransferQueue();
183	<	q.addAll(null);
184	<	shouldThrow();
185	<	} catch (NullPointerException success) {
135	>	assertTrue(q.add(i));
136		}
137		}
138
#	Line 190 | Line 140 | public class LinkedTransferQueueTest ext
140		* addAll(this) throws IllegalArgumentException
141		*/
142		public void testAddAllSelf() {
143	+	LinkedTransferQueue q = populatedQueue(SIZE);
144		try {
194	–	LinkedTransferQueue q = populatedQueue(SIZE);
145		q.addAll(q);
146		shouldThrow();
147	<	} catch (IllegalArgumentException success) {
198	<	}
199	<	}
200	<
201	<	/**
202	<	* addAll of a collection with null elements throws NullPointerException
203	<	*/
204	<	public void testAddAll2() {
205	<	try {
206	<	LinkedTransferQueue q = new LinkedTransferQueue();
207	<	Integer[] ints = new Integer[SIZE];
208	<	q.addAll(Arrays.asList(ints));
209	<	shouldThrow();
210	<	} catch (NullPointerException success) {
211	<	}
147	>	} catch (IllegalArgumentException success) {}
148		}
149
150		/**
#	Line 216 | Line 152 | public class LinkedTransferQueueTest ext
152		* NullPointerException after possibly adding some elements
153		*/
154		public void testAddAll3() {
155	+	LinkedTransferQueue q = new LinkedTransferQueue();
156	+	Integer[] ints = new Integer[SIZE];
157	+	for (int i = 0; i < SIZE - 1; ++i)
158	+	ints[i] = i;
159		try {
220	–	LinkedTransferQueue q = new LinkedTransferQueue();
221	–	Integer[] ints = new Integer[SIZE];
222	–	for (int i = 0; i < SIZE - 1; ++i) {
223	–	ints[i] = i;
224	–	}
160		q.addAll(Arrays.asList(ints));
161		shouldThrow();
162	<	} catch (NullPointerException success) {
228	<	}
162	>	} catch (NullPointerException success) {}
163		}
164
165		/**
#	Line 246 | Line 180 | public class LinkedTransferQueueTest ext
180		}
181
182		/**
249	–	* put(null) throws NullPointerException
250	–	*/
251	–	public void testPutNull() throws InterruptedException {
252	–	try {
253	–	LinkedTransferQueue q = new LinkedTransferQueue();
254	–	q.put(null);
255	–	shouldThrow();
256	–	} catch (NullPointerException success) {}
257	–	}
258	–
259	–	/**
183		* all elements successfully put are contained
184		*/
185		public void testPut() {
186	<	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
186	>	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
187		for (int i = 0; i < SIZE; ++i) {
188	<	assertEquals(q.size(), i);
188	>	assertEquals(i, q.size());
189		q.put(i);
190		assertTrue(q.contains(i));
191		}
#	Line 279 | Line 202 | public class LinkedTransferQueueTest ext
202		}
203
204		/**
205	<	* take blocks interruptibly when empty
283	<	*/
284	<	public void testTakeFromEmpty() throws InterruptedException {
285	<	final LinkedTransferQueue q = new LinkedTransferQueue();
286	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
287	<	void realRun() throws InterruptedException {
288	<	q.take();
289	<	}});
290	<	Thread.sleep(SHORT_DELAY_MS);
291	<	t.interrupt();
292	<	t.join();
293	<	}
294	<
295	<	/**
296	<	* Take removes existing elements until empty, then blocks interruptibly
205	>	* take removes existing elements until empty, then blocks interruptibly
206		*/
207		public void testBlockingTake() throws InterruptedException {
208	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
209	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
210	<	void realRun() throws InterruptedException {
211	<	for (int i = 0; i < SIZE; ++i) {
212	<	threadAssertEquals(i, (int) q.take());
213	<	}
214	<	q.take();
208	>	final BlockingQueue q = populatedQueue(SIZE);
209	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
210	>	Thread t = newStartedThread(new CheckedRunnable() {
211	>	public void realRun() throws InterruptedException {
212	>	for (int i = 0; i < SIZE; i++) assertEquals(i, q.take());
213	>
214	>	Thread.currentThread().interrupt();
215	>	try {
216	>	q.take();
217	>	shouldThrow();
218	>	} catch (InterruptedException success) {}
219	>	assertFalse(Thread.interrupted());
220	>
221	>	pleaseInterrupt.countDown();
222	>	try {
223	>	q.take();
224	>	shouldThrow();
225	>	} catch (InterruptedException success) {}
226	>	assertFalse(Thread.interrupted());
227		}});
228	<	Thread.sleep(SMALL_DELAY_MS);
228	>
229	>	await(pleaseInterrupt);
230	>	assertThreadBlocks(t, Thread.State.WAITING);
231		t.interrupt();
232	<	t.join();
310	<	checkEmpty(q);
232	>	awaitTermination(t);
233		}
234
235		/**
#	Line 323 | Line 245 | public class LinkedTransferQueueTest ext
245		}
246
247		/**
248	<	* timed pool with zero timeout succeeds when non-empty, else times out
248	>	* timed poll with zero timeout succeeds when non-empty, else times out
249		*/
250		public void testTimedPoll0() throws InterruptedException {
251		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
#	Line 335 | Line 257 | public class LinkedTransferQueueTest ext
257		}
258
259		/**
260	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
260	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
261		*/
262		public void testTimedPoll() throws InterruptedException {
263		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
264	<	for (int i = 0; i < SIZE; ++i) {
265	<	long t0 = System.nanoTime();
264	>	long startTime = System.nanoTime();
265	>	for (int i = 0; i < SIZE; ++i)
266		assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
267	<	long millisElapsed = (System.nanoTime() - t0)/(1024 * 1024);
268	<	assertTrue(millisElapsed < SMALL_DELAY_MS);
269	<	}
270	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
267	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
268	>
269	>	startTime = System.nanoTime();
270	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
271	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
272		checkEmpty(q);
273		}
274
#	Line 354 | Line 277 | public class LinkedTransferQueueTest ext
277		* returning timeout status
278		*/
279		public void testInterruptedTimedPoll() throws InterruptedException {
280	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
281	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
282	<	void realRun() throws InterruptedException {
283	<	for (int i = 0; i < SIZE; ++i) {
284	<	long t0 = System.nanoTime();
285	<	threadAssertEquals(i, (int) q.poll(LONG_DELAY_MS,
286	<	MILLISECONDS));
287	<	long millisElapsed = (System.nanoTime() - t0)/(1024 * 1024);
288	<	assertTrue(millisElapsed < SMALL_DELAY_MS);
289	<	}
290	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
280	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
281	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
282	>	Thread t = newStartedThread(new CheckedRunnable() {
283	>	public void realRun() throws InterruptedException {
284	>	long startTime = System.nanoTime();
285	>	for (int i = 0; i < SIZE; ++i)
286	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
287	>
288	>	pleaseInterrupt.countDown();
289	>	try {
290	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
291	>	shouldThrow();
292	>	} catch (InterruptedException success) {}
293	>	assertFalse(Thread.interrupted());
294	>
295	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
296		}});
297	<	Thread.sleep(SMALL_DELAY_MS);
297	>
298	>	await(pleaseInterrupt);
299	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
300		t.interrupt();
301	<	t.join();
301	>	awaitTermination(t);
302		checkEmpty(q);
303		}
304
305		/**
306	<	* timed poll before a delayed offer fails; after offer succeeds;
307	<	* on interruption throws
306	>	* timed poll after thread interrupted throws InterruptedException
307	>	* instead of returning timeout status
308		*/
309	<	public void testTimedPollWithOffer() throws InterruptedException {
310	<	final LinkedTransferQueue q = new LinkedTransferQueue();
311	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
312	<	void realRun() throws InterruptedException {
313	<	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
314	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
315	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
309	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
310	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
311	>	Thread t = newStartedThread(new CheckedRunnable() {
312	>	public void realRun() throws InterruptedException {
313	>	long startTime = System.nanoTime();
314	>	Thread.currentThread().interrupt();
315	>	for (int i = 0; i < SIZE; ++i)
316	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
317	>	try {
318	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
319	>	shouldThrow();
320	>	} catch (InterruptedException success) {}
321	>	assertFalse(Thread.interrupted());
322	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
323		}});
324	<	Thread.sleep(SMALL_DELAY_MS);
325	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
326	<	t.interrupt();
390	<	t.join();
324	>
325	>	awaitTermination(t);
326	>	checkEmpty(q);
327		}
328
329		/**
#	Line 417 | Line 353 | public class LinkedTransferQueueTest ext
353		try {
354		q.element();
355		shouldThrow();
356	<	} catch (NoSuchElementException success) {
421	<	}
356	>	} catch (NoSuchElementException success) {}
357		checkEmpty(q);
358		}
359
#	Line 433 | Line 368 | public class LinkedTransferQueueTest ext
368		try {
369		q.remove();
370		shouldThrow();
371	<	} catch (NoSuchElementException success) {
437	<	}
438	<	checkEmpty(q);
439	<	}
440	<
441	<	/**
442	<	* remove(x) removes x and returns true if present
443	<	*/
444	<	public void testRemoveElement() throws InterruptedException {
445	<	LinkedTransferQueue q = populatedQueue(SIZE);
446	<	for (int i = 1; i < SIZE; i += 2) {
447	<	assertTrue(q.remove(i));
448	<	}
449	<	for (int i = 0; i < SIZE; i += 2) {
450	<	assertTrue(q.remove(i));
451	<	assertFalse(q.remove(i + 1));
452	<	}
371	>	} catch (NoSuchElementException success) {}
372		checkEmpty(q);
373		}
374
#	Line 463 | Line 382 | public class LinkedTransferQueueTest ext
382		assertTrue(q.remove(one));
383		assertTrue(q.remove(two));
384		assertTrue(q.add(three));
385	<	assertTrue(q.take() == three);
385	>	assertSame(q.take(), three);
386		}
387
388		/**
#	Line 499 | Line 418 | public class LinkedTransferQueueTest ext
418		*/
419		public void testContainsAll() {
420		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
421	<	LinkedTransferQueue<Integer> p = new LinkedTransferQueue<Integer>();
421	>	LinkedTransferQueue<Integer> p = new LinkedTransferQueue<>();
422		for (int i = 0; i < SIZE; ++i) {
423		assertTrue(q.containsAll(p));
424		assertFalse(p.containsAll(q));
#	Line 545 | Line 464 | public class LinkedTransferQueueTest ext
464		}
465
466		/**
467	<	* toArray contains all elements
467	>	* toArray() contains all elements in FIFO order
468		*/
469	<	public void testToArray() throws InterruptedException {
469	>	public void testToArray() {
470		LinkedTransferQueue q = populatedQueue(SIZE);
471		Object[] o = q.toArray();
472		for (int i = 0; i < o.length; i++) {
473	<	assertEquals(o[i], q.take());
473	>	assertSame(o[i], q.poll());
474		}
475		}
476
477		/**
478	<	* toArray(a) contains all elements
478	>	* toArray(a) contains all elements in FIFO order
479		*/
480	<	public void testToArray2() throws InterruptedException {
480	>	public void testToArray2() {
481		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
482		Integer[] ints = new Integer[SIZE];
483	<	ints = q.toArray(ints);
483	>	Integer[] array = q.toArray(ints);
484	>	assertSame(ints, array);
485		for (int i = 0; i < ints.length; i++) {
486	<	assertEquals(ints[i], q.take());
567	<	}
568	<	}
569	<
570	<	/**
571	<	* toArray(null) throws NullPointerException
572	<	*/
573	<	public void testToArray_BadArg() {
574	<	try {
575	<	LinkedTransferQueue q = populatedQueue(SIZE);
576	<	Object o[] = q.toArray(null);
577	<	shouldThrow();
578	<	} catch (NullPointerException success) {
486	>	assertSame(ints[i], q.poll());
487		}
488		}
489
490		/**
491	<	* toArray with incompatible array type throws CCE
491	>	* toArray(incompatible array type) throws ArrayStoreException
492		*/
493		public void testToArray1_BadArg() {
494	+	LinkedTransferQueue q = populatedQueue(SIZE);
495		try {
496	<	LinkedTransferQueue q = populatedQueue(SIZE);
588	<	Object o[] = q.toArray(new String[10]);
496	>	q.toArray(new String[10]);
497		shouldThrow();
498	<	} catch (ArrayStoreException success) {
591	<	}
498	>	} catch (ArrayStoreException success) {}
499		}
500
501		/**
#	Line 597 | Line 504 | public class LinkedTransferQueueTest ext
504		public void testIterator() throws InterruptedException {
505		LinkedTransferQueue q = populatedQueue(SIZE);
506		Iterator it = q.iterator();
507	<	int i = 0;
508	<	while (it.hasNext()) {
509	<	assertEquals(it.next(), i++);
603	<	}
507	>	int i;
508	>	for (i = 0; it.hasNext(); i++)
509	>	assertTrue(q.contains(it.next()));
510		assertEquals(i, SIZE);
511	+	assertIteratorExhausted(it);
512	+
513	+	it = q.iterator();
514	+	for (i = 0; it.hasNext(); i++)
515	+	assertEquals(it.next(), q.take());
516	+	assertEquals(i, SIZE);
517	+	assertIteratorExhausted(it);
518	+	}
519	+
520	+	/**
521	+	* iterator of empty collection has no elements
522	+	*/
523	+	public void testEmptyIterator() {
524	+	assertIteratorExhausted(new LinkedTransferQueue().iterator());
525		}
526
527		/**
#	Line 618 | Line 538 | public class LinkedTransferQueueTest ext
538		it.remove();
539
540		it = q.iterator();
541	<	assertEquals(it.next(), one);
542	<	assertEquals(it.next(), three);
541	>	assertSame(it.next(), one);
542	>	assertSame(it.next(), three);
543		assertFalse(it.hasNext());
544		}
545
#	Line 627 | Line 547 | public class LinkedTransferQueueTest ext
547		* iterator ordering is FIFO
548		*/
549		public void testIteratorOrdering() {
550	<	final LinkedTransferQueue<Integer> q
631	<	= new LinkedTransferQueue<Integer>();
550	>	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
551		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
552		q.add(one);
553		q.add(two);
#	Line 663 | Line 582 | public class LinkedTransferQueueTest ext
582		LinkedTransferQueue q = populatedQueue(SIZE);
583		String s = q.toString();
584		for (int i = 0; i < SIZE; ++i) {
585	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
585	>	assertTrue(s.contains(String.valueOf(i)));
586		}
587		}
588
#	Line 672 | Line 591 | public class LinkedTransferQueueTest ext
591		*/
592		public void testOfferInExecutor() {
593		final LinkedTransferQueue q = new LinkedTransferQueue();
594	<	q.add(one);
595	<	q.add(two);
596	<	ExecutorService executor = Executors.newFixedThreadPool(2);
597	<
598	<	executor.execute(new CheckedRunnable() {
599	<	void realRun() {
600	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS,
601	<	MILLISECONDS));
602	<	}});
603	<
604	<	executor.execute(new CheckedRunnable() {
686	<	void realRun() throws InterruptedException {
687	<	Thread.sleep(SMALL_DELAY_MS);
688	<	threadAssertEquals(one, q.take());
689	<	}});
594	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
595	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
596	>	try (PoolCleaner cleaner = cleaner(executor)) {
597	>
598	>	executor.execute(new CheckedRunnable() {
599	>	public void realRun() throws InterruptedException {
600	>	threadsStarted.await();
601	>	long startTime = System.nanoTime();
602	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
603	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
604	>	}});
605
606	<	joinPool(executor);
606	>	executor.execute(new CheckedRunnable() {
607	>	public void realRun() throws InterruptedException {
608	>	threadsStarted.await();
609	>	assertSame(one, q.take());
610	>	checkEmpty(q);
611	>	}});
612	>	}
613		}
614
615		/**
616	<	* poll retrieves elements across Executor threads
616	>	* timed poll retrieves elements across Executor threads
617		*/
618		public void testPollInExecutor() {
619		final LinkedTransferQueue q = new LinkedTransferQueue();
620	<	ExecutorService executor = Executors.newFixedThreadPool(2);
621	<
622	<	executor.execute(new CheckedRunnable() {
623	<	void realRun() throws InterruptedException {
624	<	threadAssertNull(q.poll());
625	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS,
626	<	MILLISECONDS));
627	<	threadAssertTrue(q.isEmpty());
628	<	}});
629	<
630	<	executor.execute(new CheckedRunnable() {
631	<	void realRun() throws InterruptedException {
632	<	Thread.sleep(SMALL_DELAY_MS);
712	<	q.put(one);
713	<	}});
620	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
621	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
622	>	try (PoolCleaner cleaner = cleaner(executor)) {
623	>
624	>	executor.execute(new CheckedRunnable() {
625	>	public void realRun() throws InterruptedException {
626	>	assertNull(q.poll());
627	>	threadsStarted.await();
628	>	long startTime = System.nanoTime();
629	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
630	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
631	>	checkEmpty(q);
632	>	}});
633
634	<	joinPool(executor);
634	>	executor.execute(new CheckedRunnable() {
635	>	public void realRun() throws InterruptedException {
636	>	threadsStarted.await();
637	>	q.put(one);
638	>	}});
639	>	}
640		}
641
642		/**
643		* A deserialized serialized queue has same elements in same order
644		*/
645		public void testSerialization() throws Exception {
646	<	LinkedTransferQueue q = populatedQueue(SIZE);
647	<
724	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
725	<	ObjectOutputStream out
726	<	= new ObjectOutputStream(new BufferedOutputStream(bout));
727	<	out.writeObject(q);
728	<	out.close();
729	<
730	<	ByteArrayInputStream bin
731	<	= new ByteArrayInputStream(bout.toByteArray());
732	<	ObjectInputStream in
733	<	= new ObjectInputStream(new BufferedInputStream(bin));
734	<	LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
735	<
736	<	assertEquals(q.size(), r.size());
737	<	while (!q.isEmpty()) {
738	<	assertEquals(q.remove(), r.remove());
739	<	}
740	<	}
741	<
742	<	/**
743	<	* drainTo(null) throws NullPointerException
744	<	*/
745	<	public void testDrainToNull() {
746	<	LinkedTransferQueue q = populatedQueue(SIZE);
747	<	try {
748	<	q.drainTo(null);
749	<	shouldThrow();
750	<	} catch (NullPointerException success) {
751	<	}
752	<	}
646	>	Queue x = populatedQueue(SIZE);
647	>	Queue y = serialClone(x);
648
649	<	/**
650	<	* drainTo(this) throws IllegalArgumentException
651	<	*/
652	<	public void testDrainToSelf() {
653	<	LinkedTransferQueue q = populatedQueue(SIZE);
654	<	try {
655	<	q.drainTo(q);
761	<	shouldThrow();
762	<	} catch (IllegalArgumentException success) {
649	>	assertNotSame(y, x);
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 770 | Line 664 | public class LinkedTransferQueueTest ext
664		LinkedTransferQueue q = populatedQueue(SIZE);
665		ArrayList l = new ArrayList();
666		q.drainTo(l);
667	<	assertEquals(q.size(), 0);
668	<	assertEquals(l.size(), SIZE);
667	>	assertEquals(0, q.size());
668	>	assertEquals(SIZE, l.size());
669		for (int i = 0; i < SIZE; ++i) {
670	<	assertEquals(l.get(i), i);
670	>	assertEquals(i, l.get(i));
671		}
672		q.add(zero);
673		q.add(one);
#	Line 782 | Line 676 | public class LinkedTransferQueueTest ext
676		assertTrue(q.contains(one));
677		l.clear();
678		q.drainTo(l);
679	<	assertEquals(q.size(), 0);
680	<	assertEquals(l.size(), 2);
679	>	assertEquals(0, q.size());
680	>	assertEquals(2, l.size());
681		for (int i = 0; i < 2; ++i) {
682	<	assertEquals(l.get(i), i);
682	>	assertEquals(i, l.get(i));
683		}
684		}
685
686		/**
687	<	* drainTo empties full queue, unblocking a waiting put.
687	>	* drainTo(c) empties full queue, unblocking a waiting put.
688		*/
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();
696		q.drainTo(l);
697		assertTrue(l.size() >= SIZE);
698	<	for (int i = 0; i < SIZE; ++i) {
699	<	assertEquals(l.get(i), i);
700	<	}
807	<	t.join();
698	>	for (int i = 0; i < SIZE; ++i)
699	>	assertEquals(i, l.get(i));
700	>	awaitTermination(t);
701		assertTrue(q.size() + l.size() >= SIZE);
702		}
703
704		/**
705	<	* drainTo(null, n) throws NullPointerException
813	<	*/
814	<	public void testDrainToNullN() {
815	<	LinkedTransferQueue q = populatedQueue(SIZE);
816	<	try {
817	<	q.drainTo(null, SIZE);
818	<	shouldThrow();
819	<	} catch (NullPointerException success) {
820	<	}
821	<	}
822	<
823	<	/**
824	<	* drainTo(this, n) throws IllegalArgumentException
825	<	*/
826	<	public void testDrainToSelfN() {
827	<	LinkedTransferQueue q = populatedQueue(SIZE);
828	<	try {
829	<	q.drainTo(q, SIZE);
830	<	shouldThrow();
831	<	} catch (IllegalArgumentException success) {
832	<	}
833	<	}
834	<
835	<	/**
836	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
705	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
706		*/
707		public void testDrainToN() {
708		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 844 | Line 713 | public class LinkedTransferQueueTest ext
713		ArrayList l = new ArrayList();
714		q.drainTo(l, i);
715		int k = (i < SIZE) ? i : SIZE;
716	<	assertEquals(l.size(), k);
717	<	assertEquals(q.size(), SIZE - k);
718	<	for (int j = 0; j < k; ++j) {
719	<	assertEquals(l.get(j), j);
720	<	}
852	<	while (q.poll() != null)
853	<	;
716	>	assertEquals(k, l.size());
717	>	assertEquals(SIZE - k, q.size());
718	>	for (int j = 0; j < k; ++j)
719	>	assertEquals(j, l.get(j));
720	>	do {} while (q.poll() != null);
721		}
722		}
723
724		/**
725	<	* poll and take decrement the waiting consumer count
725	>	* timed poll() or take() increments the waiting consumer count;
726	>	* offer(e) decrements the waiting consumer count
727		*/
728		public void testWaitingConsumer() throws InterruptedException {
729		final LinkedTransferQueue q = new LinkedTransferQueue();
730	<	final ConsumerObserver waiting = new ConsumerObserver();
730	>	assertEquals(0, q.getWaitingConsumerCount());
731	>	assertFalse(q.hasWaitingConsumer());
732	>	final CountDownLatch threadStarted = new CountDownLatch(1);
733
734		Thread t = newStartedThread(new CheckedRunnable() {
735	<	void realRun() throws InterruptedException {
736	<	Thread.sleep(SMALL_DELAY_MS);
737	<	threadAssertTrue(q.hasWaitingConsumer());
738	<	waiting.setWaitingConsumer(q.getWaitingConsumerCount());
739	<	threadAssertTrue(q.offer(new Object()));
735	>	public void realRun() throws InterruptedException {
736	>	threadStarted.countDown();
737	>	long startTime = System.nanoTime();
738	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
739	>	assertEquals(0, q.getWaitingConsumerCount());
740	>	assertFalse(q.hasWaitingConsumer());
741	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
742		}});
743
744	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) != null);
745	<	assertTrue(q.getWaitingConsumerCount()
746	<	< waiting.getWaitingConsumers());
747	<	t.join();
744	>	threadStarted.await();
745	>	Callable<Boolean> oneConsumer
746	>	= new Callable<Boolean>() { public Boolean call() {
747	>	return q.hasWaitingConsumer()
748	>	&& q.getWaitingConsumerCount() == 1; }};
749	>	waitForThreadToEnterWaitState(t, oneConsumer);
750	>
751	>	assertTrue(q.offer(one));
752	>	assertEquals(0, q.getWaitingConsumerCount());
753	>	assertFalse(q.hasWaitingConsumer());
754	>
755	>	awaitTermination(t);
756		}
757
758		/**
#	Line 883 | Line 763 | public class LinkedTransferQueueTest ext
763		LinkedTransferQueue q = new LinkedTransferQueue();
764		q.transfer(null);
765		shouldThrow();
766	<	} catch (NullPointerException ex) {
887	<	}
766	>	} catch (NullPointerException success) {}
767		}
768
769		/**
770		* transfer waits until a poll occurs. The transfered element
771	<	* is returned by this associated poll.
771	>	* is returned by the associated poll.
772		*/
773		public void testTransfer2() throws InterruptedException {
774	<	final LinkedTransferQueue<Integer> q
775	<	= new LinkedTransferQueue<Integer>();
774	>	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
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);
785	<	assertEquals(1, q.size());
786	<	assertEquals(SIZE, (int) q.poll());
787	<	assertTrue(q.isEmpty());
788	<	t.join();
784	>	threadStarted.await();
785	>	Callable<Boolean> oneElement
786	>	= new Callable<Boolean>() { public Boolean call() {
787	>	return !q.isEmpty() && q.size() == 1; }};
788	>	waitForThreadToEnterWaitState(t, oneElement);
789	>
790	>	assertSame(five, q.poll());
791	>	checkEmpty(q);
792	>	awaitTermination(t);
793		}
794
795		/**
796		* transfer waits until a poll occurs, and then transfers in fifo order
797		*/
798		public void testTransfer3() throws InterruptedException {
799	<	final LinkedTransferQueue<Integer> q
916	<	= new LinkedTransferQueue<Integer>();
799	>	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
800
801		Thread first = newStartedThread(new CheckedRunnable() {
802	<	void realRun() throws InterruptedException {
803	<	Integer i = SIZE + 1;
804	<	q.transfer(i);
805	<	threadAssertTrue(!q.contains(i));
923	<	threadAssertEquals(1, q.size());
802	>	public void realRun() throws InterruptedException {
803	>	q.transfer(four);
804	>	assertFalse(q.contains(four));
805	>	assertEquals(1, q.size());
806		}});
807
808		Thread interruptedThread = newStartedThread(
809		new CheckedInterruptedRunnable() {
810	<	void realRun() throws InterruptedException {
811	<	while (q.size() == 0)
810	>	public void realRun() throws InterruptedException {
811	>	while (q.isEmpty())
812		Thread.yield();
813	<	q.transfer(SIZE);
813	>	q.transfer(five);
814		}});
815
816		while (q.size() < 2)
817		Thread.yield();
818		assertEquals(2, q.size());
819	<	assertEquals(SIZE + 1, (int) q.poll());
819	>	assertSame(four, q.poll());
820		first.join();
821		assertEquals(1, q.size());
822		interruptedThread.interrupt();
823		interruptedThread.join();
824	<	assertEquals(0, q.size());
943	<	assertTrue(q.isEmpty());
824	>	checkEmpty(q);
825		}
826
827		/**
#	Line 951 | Line 832 | public class LinkedTransferQueueTest ext
832		final LinkedTransferQueue q = new LinkedTransferQueue();
833
834		Thread t = newStartedThread(new CheckedRunnable() {
835	<	void realRun() throws InterruptedException {
835	>	public void realRun() throws InterruptedException {
836		q.transfer(four);
837	<	threadAssertFalse(q.contains(four));
838	<	threadAssertEquals(three, q.poll());
837	>	assertFalse(q.contains(four));
838	>	assertSame(three, q.poll());
839		}});
840
841	<	Thread.sleep(SHORT_DELAY_MS);
841	>	while (q.isEmpty())
842	>	Thread.yield();
843	>	assertFalse(q.isEmpty());
844	>	assertEquals(1, q.size());
845		assertTrue(q.offer(three));
846	<	assertEquals(four, q.poll());
847	<	t.join();
846	>	assertSame(four, q.poll());
847	>	awaitTermination(t);
848		}
849
850		/**
851		* transfer waits until a take occurs. The transfered element
852	<	* is returned by this associated take.
852	>	* is returned by the associated take.
853		*/
854		public void testTransfer5() throws InterruptedException {
855	<	final LinkedTransferQueue<Integer> q
972	<	= new LinkedTransferQueue<Integer>();
855	>	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
856
857		Thread t = newStartedThread(new CheckedRunnable() {
858	<	void realRun() throws InterruptedException {
859	<	q.transfer(SIZE);
858	>	public void realRun() throws InterruptedException {
859	>	q.transfer(four);
860		checkEmpty(q);
861		}});
862
863	<	Thread.sleep(SHORT_DELAY_MS);
864	<	assertEquals(SIZE, (int) q.take());
863	>	while (q.isEmpty())
864	>	Thread.yield();
865	>	assertFalse(q.isEmpty());
866	>	assertEquals(1, q.size());
867	>	assertSame(four, q.take());
868		checkEmpty(q);
869	<	t.join();
869	>	awaitTermination(t);
870		}
871
872		/**
873		* tryTransfer(null) throws NullPointerException
874		*/
875		public void testTryTransfer1() {
876	+	final LinkedTransferQueue q = new LinkedTransferQueue();
877		try {
991	–	final LinkedTransferQueue q = new LinkedTransferQueue();
878		q.tryTransfer(null);
879		shouldThrow();
880	<	} catch (NullPointerException ex) {
995	<	}
880	>	} catch (NullPointerException success) {}
881		}
882
883		/**
#	Line 1015 | 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);
1024	<	threadAssertTrue(q.tryTransfer(hotPotato));
906	>	assertTrue(q.hasWaitingConsumer());
907	>	checkEmpty(q);
908	>	assertTrue(q.tryTransfer(hotPotato));
909		}});
910
911	<	assertTrue(q.poll(MEDIUM_DELAY_MS, MILLISECONDS) == hotPotato);
911	>	long startTime = System.nanoTime();
912	>	assertSame(hotPotato, q.poll(LONG_DELAY_MS, MILLISECONDS));
913	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
914		checkEmpty(q);
915	<	t.join();
915	>	awaitTermination(t);
916		}
917
918		/**
#	Line 1038 | Line 924 | public class LinkedTransferQueueTest ext
924		final LinkedTransferQueue q = new LinkedTransferQueue();
925
926		Thread t = newStartedThread(new CheckedRunnable() {
927	<	void realRun() {
927	>	public void realRun() {
928		while (! q.hasWaitingConsumer())
929		Thread.yield();
930	<	threadAssertTrue(q.hasWaitingConsumer());
931	<	threadAssertTrue(q.isEmpty());
932	<	threadAssertTrue(q.size() == 0);
1047	<	threadAssertTrue(q.tryTransfer(hotPotato));
930	>	assertTrue(q.hasWaitingConsumer());
931	>	checkEmpty(q);
932	>	assertTrue(q.tryTransfer(hotPotato));
933		}});
934
935	<	assertTrue(q.take() == hotPotato);
935	>	assertSame(q.take(), hotPotato);
936		checkEmpty(q);
937	<	t.join();
937	>	awaitTermination(t);
938		}
939
940		/**
941	<	* tryTransfer waits the amount given if interrupted, and
1057	<	* throws interrupted exception
941	>	* tryTransfer blocks interruptibly if no takers
942		*/
943		public void testTryTransfer5() throws InterruptedException {
944		final LinkedTransferQueue q = new LinkedTransferQueue();
945	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
946	+	assertTrue(q.isEmpty());
947
948	<	Thread toInterrupt = newStartedThread(new CheckedInterruptedRunnable() {
949	<	void realRun() throws InterruptedException {
950	<	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
948	>	Thread t = newStartedThread(new CheckedRunnable() {
949	>	public void realRun() throws InterruptedException {
950	>	long startTime = System.nanoTime();
951	>	Thread.currentThread().interrupt();
952	>	try {
953	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
954	>	shouldThrow();
955	>	} catch (InterruptedException success) {}
956	>	assertFalse(Thread.interrupted());
957	>
958	>	pleaseInterrupt.countDown();
959	>	try {
960	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
961	>	shouldThrow();
962	>	} catch (InterruptedException success) {}
963	>	assertFalse(Thread.interrupted());
964	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
965		}});
966
967	<	Thread.sleep(SMALL_DELAY_MS);
968	<	toInterrupt.interrupt();
969	<	toInterrupt.join();
967	>	await(pleaseInterrupt);
968	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
969	>	t.interrupt();
970	>	awaitTermination(t);
971	>	checkEmpty(q);
972		}
973
974		/**
975	<	* tryTransfer gives up after the timeout and return false
975	>	* tryTransfer gives up after the timeout and returns false
976		*/
977		public void testTryTransfer6() throws InterruptedException {
978		final LinkedTransferQueue q = new LinkedTransferQueue();
979
980		Thread t = newStartedThread(new CheckedRunnable() {
981	<	void realRun() throws InterruptedException {
982	<	threadAssertFalse
983	<	(q.tryTransfer(new Object(),
984	<	SHORT_DELAY_MS, MILLISECONDS));
981	>	public void realRun() throws InterruptedException {
982	>	long startTime = System.nanoTime();
983	>	assertFalse(q.tryTransfer(new Object(),
984	>	timeoutMillis(), MILLISECONDS));
985	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
986	>	checkEmpty(q);
987		}});
988
989	<	Thread.sleep(SMALL_DELAY_MS);
989	>	awaitTermination(t);
990		checkEmpty(q);
1087	–	t.join();
991		}
992
993		/**
#	Line 1096 | Line 999 | public class LinkedTransferQueueTest ext
999		assertTrue(q.offer(four));
1000
1001		Thread t = newStartedThread(new CheckedRunnable() {
1002	<	void realRun() throws InterruptedException {
1003	<	threadAssertTrue(q.tryTransfer(five,
1004	<	MEDIUM_DELAY_MS, MILLISECONDS));
1005	<	threadAssertTrue(q.isEmpty());
1002	>	public void realRun() throws InterruptedException {
1003	>	long startTime = System.nanoTime();
1004	>	assertTrue(q.tryTransfer(five, LONG_DELAY_MS, MILLISECONDS));
1005	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1006	>	checkEmpty(q);
1007		}});
1008
1009	<	Thread.sleep(SHORT_DELAY_MS);
1009	>	while (q.size() != 2)
1010	>	Thread.yield();
1011		assertEquals(2, q.size());
1012	<	assertEquals(four, q.poll());
1013	<	assertEquals(five, q.poll());
1012	>	assertSame(four, q.poll());
1013	>	assertSame(five, q.poll());
1014		checkEmpty(q);
1015	<	t.join();
1015	>	awaitTermination(t);
1016		}
1017
1018		/**
1019	<	* tryTransfer attempts to enqueue into the q and fails returning
1020	<	* false not enqueueing and the successive poll is null
1019	>	* tryTransfer attempts to enqueue into the queue and fails
1020	>	* returning false not enqueueing and the successive poll is null
1021		*/
1022		public void testTryTransfer8() throws InterruptedException {
1023		final LinkedTransferQueue q = new LinkedTransferQueue();
1024		assertTrue(q.offer(four));
1025		assertEquals(1, q.size());
1026	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
1026	>	long startTime = System.nanoTime();
1027	>	assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
1028	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
1029		assertEquals(1, q.size());
1030	<	assertEquals(four, q.poll());
1124	<	checkEmpty(q);
1030	>	assertSame(four, q.poll());
1031		assertNull(q.poll());
1032	+	checkEmpty(q);
1033		}
1034
1035		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1036	<	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1037	<	assertTrue(q.isEmpty());
1036	>	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
1037	>	checkEmpty(q);
1038		for (int i = 0; i < n; i++) {
1039		assertEquals(i, q.size());
1040		assertTrue(q.offer(i));
#	Line 1137 | Line 1044 | public class LinkedTransferQueueTest ext
1044		return q;
1045		}
1046
1047	<	private static class ConsumerObserver {
1048	<
1049	<	private int waitingConsumers;
1050	<
1051	<	private ConsumerObserver() {
1052	<	}
1053	<
1054	<	private void setWaitingConsumer(int i) {
1055	<	this.waitingConsumers = i;
1056	<	}
1057	<
1058	<	private int getWaitingConsumers() {
1152	<	return waitingConsumers;
1047	>	/**
1048	>	* remove(null), contains(null) always return false
1049	>	*/
1050	>	public void testNeverContainsNull() {
1051	>	Collection<?>[] qs = {
1052	>	new LinkedTransferQueue<Object>(),
1053	>	populatedQueue(2),
1054	>	};
1055	>
1056	>	for (Collection<?> q : qs) {
1057	>	assertFalse(q.contains(null));
1058	>	assertFalse(q.remove(null));
1059		}
1060		}
1061		}

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