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

Comparing jsr166/src/test/tck/LinkedTransferQueueTest.java (file contents):
Revision 1.5 by jsr166, Sun Aug 2 08:17:31 2009 UTC vs.
Revision 1.83 by jsr166, Thu Sep 5 21:11:13 2019 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.*;
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;
21	–	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);
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		/**
52	<	* Constructor builds new queue with size being zero and empty being true
52	>	* Constructor builds new queue with size being zero and empty
53	>	* being true
54		*/
55		public void testConstructor1() {
56		assertEquals(0, new LinkedTransferQueue().size());
#	Line 39 | Line 58 | public class LinkedTransferQueueTest ext
58		}
59
60		/**
61	<	* Initializing constructor with null collection throws NullPointerException
61	>	* Initializing constructor with null collection throws
62	>	* NullPointerException
63		*/
64		public void testConstructor2() {
65		try {
66		new LinkedTransferQueue(null);
67		shouldThrow();
68	<	} catch (NullPointerException success) {
49	<	}
68	>	} catch (NullPointerException success) {}
69		}
70
71		/**
72	<	* Initializing from Collection of null elements throws NullPointerException
72	>	* Initializing from Collection of null elements throws
73	>	* NullPointerException
74		*/
75		public void testConstructor3() {
76	+	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
77		try {
78	<	Integer[] ints = new Integer[SIZE];
58	<	LinkedTransferQueue q = new LinkedTransferQueue(Arrays.asList(ints));
78	>	new LinkedTransferQueue(elements);
79		shouldThrow();
80	<	} catch (NullPointerException success) {
61	<	}
80	>	} catch (NullPointerException success) {}
81		}
82
83		/**
#	Line 66 | 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];
71	<	for (int i = 0; i < SIZE - 1; ++i) {
72	<	ints[i] = i;
73	<	}
74	<	LinkedTransferQueue q = new LinkedTransferQueue(Arrays.asList(ints));
93	>	new LinkedTransferQueue(elements);
94		shouldThrow();
95	<	} catch (NullPointerException success) {
77	<	}
95	>	} catch (NullPointerException success) {}
96		}
97
98		/**
99		* Queue contains all elements of the collection it is initialized by
100		*/
101		public void testConstructor5() {
102	<	try {
103	<	Integer[] ints = new Integer[SIZE];
104	<	for (int i = 0; i < SIZE; ++i) {
105	<	ints[i] = i;
106	<	}
107	<	LinkedTransferQueue q = new LinkedTransferQueue(Arrays.asList(ints));
108	<	for (int i = 0; i < SIZE; ++i) {
109	<	assertEquals(ints[i], q.poll());
110	<	}
111	<	} finally {
102	>	Integer[] ints = new Integer[SIZE];
103	>	for (int i = 0; i < SIZE; ++i) {
104	>	ints[i] = i;
105	>	}
106	>	List intList = Arrays.asList(ints);
107	>	LinkedTransferQueue q
108	>	= new LinkedTransferQueue(intList);
109	>	assertEquals(q.size(), intList.size());
110	>	assertEquals(q.toString(), intList.toString());
111	>	assertTrue(Arrays.equals(q.toArray(),
112	>	intList.toArray()));
113	>	assertTrue(Arrays.equals(q.toArray(new Object[0]),
114	>	intList.toArray(new Object[0])));
115	>	assertTrue(Arrays.equals(q.toArray(new Object[SIZE]),
116	>	intList.toArray(new Object[SIZE])));
117	>	for (int i = 0; i < SIZE; ++i) {
118	>	assertEquals(ints[i], q.poll());
119		}
120		}
121
122		/**
123	<	* Remaining capacity never decrease nor increase on add or remove
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);
111	<	}
112	<	}
113	<
114	<	/**
115	<	* offer(null) throws NullPointerException
116	<	*/
117	<	public void testOfferNull() {
118	<	try {
119	<	LinkedTransferQueue q = new LinkedTransferQueue();
120	<	q.offer(null);
121	<	shouldThrow();
122	<	} catch (NullPointerException success) {
123	<	}
124	<	}
125	<
126	<	/**
127	<	* add(null) throws NullPointerException
128	<	*/
129	<	public void testAddNull() {
130	<	try {
131	<	LinkedTransferQueue q = new LinkedTransferQueue();
132	<	q.add(null);
133	<	shouldThrow();
134	<	} catch (NullPointerException success) {
135	<	}
136	<	}
137	<
138	<	/**
139	<	* addAll(null) throws NullPointerException
140	<	*/
141	<	public void testAddAll1() {
142	<	try {
143	<	LinkedTransferQueue q = new LinkedTransferQueue();
144	<	q.addAll(null);
145	<	shouldThrow();
146	<	} catch (NullPointerException success) {
135	>	assertTrue(q.add(i));
136		}
137		}
138
#	Line 151 | Line 140 | public class LinkedTransferQueueTest ext
140		* addAll(this) throws IllegalArgumentException
141		*/
142		public void testAddAllSelf() {
143	+	LinkedTransferQueue q = populatedQueue(SIZE);
144		try {
155	–	LinkedTransferQueue q = populatedQueue(SIZE);
145		q.addAll(q);
146		shouldThrow();
147	<	} catch (IllegalArgumentException success) {
159	<	}
160	<	}
161	<
162	<	/**
163	<	* addAll of a collection with null elements throws NullPointerException
164	<	*/
165	<	public void testAddAll2() {
166	<	try {
167	<	LinkedTransferQueue q = new LinkedTransferQueue();
168	<	Integer[] ints = new Integer[SIZE];
169	<	q.addAll(Arrays.asList(ints));
170	<	shouldThrow();
171	<	} catch (NullPointerException success) {
172	<	}
147	>	} catch (IllegalArgumentException success) {}
148		}
149
150		/**
151	<	* addAll of a collection with any null elements throws NullPointerException after
152	<	* possibly adding some elements
151	>	* addAll of a collection with any null elements throws
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 {
181	–	LinkedTransferQueue q = new LinkedTransferQueue();
182	–	Integer[] ints = new Integer[SIZE];
183	–	for (int i = 0; i < SIZE - 1; ++i) {
184	–	ints[i] = i;
185	–	}
160		q.addAll(Arrays.asList(ints));
161		shouldThrow();
162	<	} catch (NullPointerException success) {
189	<	}
162	>	} catch (NullPointerException success) {}
163		}
164
165		/**
#	Line 207 | Line 180 | public class LinkedTransferQueueTest ext
180		}
181
182		/**
210	–	* put(null) throws NullPointerException
211	–	*/
212	–	public void testPutNull() throws InterruptedException {
213	–	try {
214	–	LinkedTransferQueue q = new LinkedTransferQueue();
215	–	q.put(null);
216	–	shouldThrow();
217	–	} catch (NullPointerException success) {}
218	–	}
219	–
220	–	/**
183		* all elements successfully put are contained
184		*/
185		public void testPut() {
186	<	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
186	>	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
187		for (int i = 0; i < SIZE; ++i) {
188	+	assertEquals(i, q.size());
189		q.put(i);
190		assertTrue(q.contains(i));
191		}
229	–	assertEquals(q.size(), SIZE);
192		}
193
194		/**
#	Line 240 | Line 202 | public class LinkedTransferQueueTest ext
202		}
203
204		/**
205	<	* take blocks interruptibly when empty
205	>	* take removes existing elements until empty, then blocks interruptibly
206		*/
207	<	public void testTakeFromEmpty() throws InterruptedException {
208	<	final LinkedTransferQueue q = new LinkedTransferQueue();
209	<	Thread t = new Thread(new Runnable() {
210	<	public void run() {
207	>	public void testBlockingTake() throws InterruptedException {
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	<	threadShouldThrow();
218	<	} catch (InterruptedException success) {
219	<	} catch (Throwable ex) {
254	<	threadUnexpectedException(ex);
255	<	}
256	<	}});
257	<	t.start();
258	<	Thread.sleep(SHORT_DELAY_MS);
259	<	t.interrupt();
260	<	t.join();
261	<	}
217	>	shouldThrow();
218	>	} catch (InterruptedException success) {}
219	>	assertFalse(Thread.interrupted());
220
221	<	/**
264	<	* Take removes existing elements until empty, then blocks interruptibly
265	<	*/
266	<	public void testBlockingTake() throws InterruptedException {
267	<	Thread t = new Thread(new Runnable() {
268	<	public void run() {
221	>	pleaseInterrupt.countDown();
222		try {
270	–	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
271	–	for (int i = 0; i < SIZE; ++i) {
272	–	threadAssertEquals(i, (int) q.take());
273	–	}
223		q.take();
224	<	threadShouldThrow();
225	<	} catch (InterruptedException success) {
226	<	} catch (Throwable ex) {
278	<	threadUnexpectedException(ex);
279	<	}
224	>	shouldThrow();
225	>	} catch (InterruptedException success) {}
226	>	assertFalse(Thread.interrupted());
227		}});
228	<	t.start();
229	<	Thread.sleep(SHORT_DELAY_MS);
228	>
229	>	await(pleaseInterrupt);
230	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
231		t.interrupt();
232	<	t.join();
232	>	awaitTermination(t);
233		}
234
235		/**
236		* poll succeeds unless empty
237		*/
238	<	public void testPoll() {
238	>	public void testPoll() throws InterruptedException {
239		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
240		for (int i = 0; i < SIZE; ++i) {
241		assertEquals(i, (int) q.poll());
242		}
243		assertNull(q.poll());
244	+	checkEmpty(q);
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);
252		for (int i = 0; i < SIZE; ++i) {
253	<	assertEquals(i, (int) q.poll(0, TimeUnit.MILLISECONDS));
253	>	assertEquals(i, (int) q.poll(0, MILLISECONDS));
254		}
255	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
255	>	assertNull(q.poll(0, MILLISECONDS));
256	>	checkEmpty(q);
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	<	assertEquals(i, (int) q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
266	<	}
267	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
264	>	long startTime = System.nanoTime();
265	>	for (int i = 0; i < SIZE; ++i)
266	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
267	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
268	>
269	>	startTime = System.nanoTime();
270	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
271	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
272	>	checkEmpty(q);
273		}
274
275		/**
#	Line 322 | Line 277 | public class LinkedTransferQueueTest ext
277		* returning timeout status
278		*/
279		public void testInterruptedTimedPoll() throws InterruptedException {
280	<	Thread t = new Thread(new Runnable() {
281	<	public void run() {
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	>	for (int i = 0; i < SIZE; i++)
285	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
286	>
287	>	Thread.currentThread().interrupt();
288		try {
289	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
290	<	for (int i = 0; i < SIZE; ++i) {
291	<	threadAssertEquals(i, (int) q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
292	<	}
293	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
294	<	} catch (InterruptedException success) {
295	<	} catch (Throwable ex) {
296	<	threadUnexpectedException(ex);
297	<	}
289	>	q.poll(randomTimeout(), randomTimeUnit());
290	>	shouldThrow();
291	>	} catch (InterruptedException success) {}
292	>	assertFalse(Thread.interrupted());
293	>
294	>	pleaseInterrupt.countDown();
295	>	try {
296	>	q.poll(LONGER_DELAY_MS, MILLISECONDS);
297	>	shouldThrow();
298	>	} catch (InterruptedException success) {}
299	>	assertFalse(Thread.interrupted());
300		}});
301	<	t.start();
302	<	Thread.sleep(SHORT_DELAY_MS);
301	>
302	>	await(pleaseInterrupt);
303	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
304		t.interrupt();
305	<	t.join();
305	>	awaitTermination(t);
306	>	checkEmpty(q);
307		}
308
309		/**
310	<	* timed poll before a delayed offer fails; after offer succeeds;
311	<	* on interruption throws
310	>	* timed poll after thread interrupted throws InterruptedException
311	>	* instead of returning timeout status
312		*/
313	<	public void testTimedPollWithOffer() throws InterruptedException {
314	<	final LinkedTransferQueue q = new LinkedTransferQueue();
315	<	Thread t = new Thread(new Runnable() {
316	<	public void run() {
313	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
314	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
315	>	Thread t = newStartedThread(new CheckedRunnable() {
316	>	public void realRun() throws InterruptedException {
317	>	long startTime = System.nanoTime();
318	>	Thread.currentThread().interrupt();
319	>	for (int i = 0; i < SIZE; ++i)
320	>	assertEquals(i, (int) q.poll(randomTimeout(), randomTimeUnit()));
321		try {
322	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
323	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
324	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
325	<	threadShouldThrow();
326	<	} catch (InterruptedException success) {
358	<	} catch (Throwable ex) {
359	<	threadUnexpectedException(ex);
360	<	}
322	>	q.poll(randomTimeout(), randomTimeUnit());
323	>	shouldThrow();
324	>	} catch (InterruptedException success) {}
325	>	assertFalse(Thread.interrupted());
326	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
327		}});
328	<	t.start();
329	<	Thread.sleep(SMALL_DELAY_MS);
330	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
365	<	t.interrupt();
366	<	t.join();
328	>
329	>	awaitTermination(t);
330	>	checkEmpty(q);
331		}
332
333		/**
334		* peek returns next element, or null if empty
335		*/
336	<	public void testPeek() {
336	>	public void testPeek() throws InterruptedException {
337		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
338		for (int i = 0; i < SIZE; ++i) {
339		assertEquals(i, (int) q.peek());
#	Line 378 | Line 342 | public class LinkedTransferQueueTest ext
342		i != (int) q.peek());
343		}
344		assertNull(q.peek());
345	+	checkEmpty(q);
346		}
347
348		/**
349		* element returns next element, or throws NoSuchElementException if empty
350		*/
351	<	public void testElement() {
351	>	public void testElement() throws InterruptedException {
352		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
353		for (int i = 0; i < SIZE; ++i) {
354		assertEquals(i, (int) q.element());
#	Line 392 | Line 357 | public class LinkedTransferQueueTest ext
357		try {
358		q.element();
359		shouldThrow();
360	<	} catch (NoSuchElementException success) {
361	<	}
360	>	} catch (NoSuchElementException success) {}
361	>	checkEmpty(q);
362		}
363
364		/**
365		* remove removes next element, or throws NoSuchElementException if empty
366		*/
367	<	public void testRemove() {
367	>	public void testRemove() throws InterruptedException {
368		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
369		for (int i = 0; i < SIZE; ++i) {
370		assertEquals(i, (int) q.remove());
#	Line 407 | Line 372 | public class LinkedTransferQueueTest ext
372		try {
373		q.remove();
374		shouldThrow();
375	<	} catch (NoSuchElementException success) {
376	<	}
412	<	}
413	<
414	<	/**
415	<	* remove(x) removes x and returns true if present
416	<	*/
417	<	public void testRemoveElement() {
418	<	LinkedTransferQueue q = populatedQueue(SIZE);
419	<	for (int i = 1; i < SIZE; i += 2) {
420	<	assertTrue(q.remove(i));
421	<	}
422	<	for (int i = 0; i < SIZE; i += 2) {
423	<	assertTrue(q.remove(i));
424	<	assertFalse(q.remove(i + 1));
425	<	}
426	<	assertTrue(q.isEmpty());
375	>	} catch (NoSuchElementException success) {}
376	>	checkEmpty(q);
377		}
378
379		/**
#	Line 436 | Line 386 | public class LinkedTransferQueueTest ext
386		assertTrue(q.remove(one));
387		assertTrue(q.remove(two));
388		assertTrue(q.add(three));
389	<	assertTrue(q.take() != null);
389	>	assertSame(q.take(), three);
390		}
391
392		/**
#	Line 454 | Line 404 | public class LinkedTransferQueueTest ext
404		/**
405		* clear removes all elements
406		*/
407	<	public void testClear() {
407	>	public void testClear() throws InterruptedException {
408		LinkedTransferQueue q = populatedQueue(SIZE);
409		q.clear();
410	<	assertTrue(q.isEmpty());
461	<	assertEquals(0, q.size());
410	>	checkEmpty(q);
411		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
412		q.add(one);
413		assertFalse(q.isEmpty());
414	+	assertEquals(1, q.size());
415		assertTrue(q.contains(one));
416		q.clear();
417	<	assertTrue(q.isEmpty());
417	>	checkEmpty(q);
418		}
419
420		/**
#	Line 472 | Line 422 | public class LinkedTransferQueueTest ext
422		*/
423		public void testContainsAll() {
424		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
425	<	LinkedTransferQueue<Integer> p = new LinkedTransferQueue<Integer>();
425	>	LinkedTransferQueue<Integer> p = new LinkedTransferQueue<>();
426		for (int i = 0; i < SIZE; ++i) {
427		assertTrue(q.containsAll(p));
428		assertFalse(p.containsAll(q));
#	Line 482 | Line 432 | public class LinkedTransferQueueTest ext
432		}
433
434		/**
435	<	* retainAll(c) retains only those elements of c and reports true if changed
435	>	* retainAll(c) retains only those elements of c and reports true
436	>	* if changed
437		*/
438		public void testRetainAll() {
439		LinkedTransferQueue q = populatedQueue(SIZE);
#	Line 501 | Line 452 | public class LinkedTransferQueueTest ext
452		}
453
454		/**
455	<	* removeAll(c) removes only those elements of c and reports true if changed
455	>	* removeAll(c) removes only those elements of c and reports true
456	>	* if changed
457		*/
458		public void testRemoveAll() {
459		for (int i = 1; i < SIZE; ++i) {
#	Line 516 | Line 468 | public class LinkedTransferQueueTest ext
468		}
469
470		/**
471	<	* toArray contains all elements
471	>	* toArray() contains all elements in FIFO order
472		*/
473	<	public void testToArray() throws InterruptedException {
473	>	public void testToArray() {
474		LinkedTransferQueue q = populatedQueue(SIZE);
475	<	Object[] o = q.toArray();
476	<	for (int i = 0; i < o.length; i++) {
477	<	assertEquals(o[i], q.take());
478	<	}
475	>	Object[] a = q.toArray();
476	>	assertSame(Object[].class, a.getClass());
477	>	for (Object o : a)
478	>	assertSame(o, q.poll());
479	>	assertTrue(q.isEmpty());
480		}
481
482		/**
483	<	* toArray(a) contains all elements
483	>	* toArray(a) contains all elements in FIFO order
484		*/
485	<	public void testToArray2() throws InterruptedException {
485	>	public void testToArray2() {
486		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
487		Integer[] ints = new Integer[SIZE];
488	<	ints = q.toArray(ints);
489	<	for (int i = 0; i < ints.length; i++) {
490	<	assertEquals(ints[i], q.take());
491	<	}
492	<	}
540	<
541	<	/**
542	<	* toArray(null) throws NullPointerException
543	<	*/
544	<	public void testToArray_BadArg() {
545	<	try {
546	<	LinkedTransferQueue q = populatedQueue(SIZE);
547	<	Object o[] = q.toArray(null);
548	<	shouldThrow();
549	<	} catch (NullPointerException success) {
550	<	}
488	>	Integer[] array = q.toArray(ints);
489	>	assertSame(ints, array);
490	>	for (Integer o : ints)
491	>	assertSame(o, q.poll());
492	>	assertTrue(q.isEmpty());
493		}
494
495		/**
496	<	* toArray with incompatible array type throws CCE
496	>	* toArray(incompatible array type) throws ArrayStoreException
497		*/
498		public void testToArray1_BadArg() {
499	+	LinkedTransferQueue q = populatedQueue(SIZE);
500		try {
501	<	LinkedTransferQueue q = populatedQueue(SIZE);
559	<	Object o[] = q.toArray(new String[10]);
501	>	q.toArray(new String[10]);
502		shouldThrow();
503	<	} catch (ArrayStoreException success) {
562	<	}
503	>	} catch (ArrayStoreException success) {}
504		}
505
506		/**
#	Line 568 | Line 509 | public class LinkedTransferQueueTest ext
509		public void testIterator() throws InterruptedException {
510		LinkedTransferQueue q = populatedQueue(SIZE);
511		Iterator it = q.iterator();
512	<	while (it.hasNext()) {
512	>	int i;
513	>	for (i = 0; it.hasNext(); i++)
514	>	assertTrue(q.contains(it.next()));
515	>	assertEquals(i, SIZE);
516	>	assertIteratorExhausted(it);
517	>
518	>	it = q.iterator();
519	>	for (i = 0; it.hasNext(); i++)
520		assertEquals(it.next(), q.take());
521	<	}
521	>	assertEquals(i, SIZE);
522	>	assertIteratorExhausted(it);
523		}
524
525		/**
526	<	* iterator.remove removes current element
526	>	* iterator of empty collection has no elements
527	>	*/
528	>	public void testEmptyIterator() {
529	>	assertIteratorExhausted(new LinkedTransferQueue().iterator());
530	>	}
531	>
532	>	/**
533	>	* iterator.remove() removes current element
534		*/
535		public void testIteratorRemove() {
536		final LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 587 | Line 543 | public class LinkedTransferQueueTest ext
543		it.remove();
544
545		it = q.iterator();
546	<	assertEquals(it.next(), one);
547	<	assertEquals(it.next(), three);
546	>	assertSame(it.next(), one);
547	>	assertSame(it.next(), three);
548		assertFalse(it.hasNext());
549		}
550
#	Line 596 | Line 552 | public class LinkedTransferQueueTest ext
552		* iterator ordering is FIFO
553		*/
554		public void testIteratorOrdering() {
555	<	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
555	>	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
556		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
557		q.add(one);
558		q.add(two);
#	Line 631 | Line 587 | public class LinkedTransferQueueTest ext
587		LinkedTransferQueue q = populatedQueue(SIZE);
588		String s = q.toString();
589		for (int i = 0; i < SIZE; ++i) {
590	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
590	>	assertTrue(s.contains(String.valueOf(i)));
591		}
592		}
593
#	Line 640 | Line 596 | public class LinkedTransferQueueTest ext
596		*/
597		public void testOfferInExecutor() {
598		final LinkedTransferQueue q = new LinkedTransferQueue();
599	<	q.add(one);
600	<	q.add(two);
601	<	ExecutorService executor = Executors.newFixedThreadPool(2);
602	<	executor.execute(new Runnable() {
603	<	public void run() {
604	<	try {
605	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
606	<	} catch (Throwable ex) {
607	<	threadUnexpectedException(ex);
608	<	}
609	<	}});
654	<
655	<	executor.execute(new Runnable() {
656	<	public void run() {
657	<	try {
658	<	Thread.sleep(SMALL_DELAY_MS);
659	<	threadAssertEquals(one, q.take());
660	<	} catch (Throwable ex) {
661	<	threadUnexpectedException(ex);
662	<	}
663	<	}});
599	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
600	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
601	>	try (PoolCleaner cleaner = cleaner(executor)) {
602	>
603	>	executor.execute(new CheckedRunnable() {
604	>	public void realRun() throws InterruptedException {
605	>	threadsStarted.await();
606	>	long startTime = System.nanoTime();
607	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
608	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
609	>	}});
610
611	<	joinPool(executor);
611	>	executor.execute(new CheckedRunnable() {
612	>	public void realRun() throws InterruptedException {
613	>	threadsStarted.await();
614	>	assertSame(one, q.take());
615	>	checkEmpty(q);
616	>	}});
617	>	}
618		}
619
620		/**
621	<	* poll retrieves elements across Executor threads
621	>	* timed poll retrieves elements across Executor threads
622		*/
623		public void testPollInExecutor() {
624		final LinkedTransferQueue q = new LinkedTransferQueue();
625	<	ExecutorService executor = Executors.newFixedThreadPool(2);
626	<	executor.execute(new Runnable() {
627	<	public void run() {
628	<	try {
629	<	threadAssertNull(q.poll());
630	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
631	<	threadAssertTrue(q.isEmpty());
632	<	} catch (Throwable  ex) {
633	<	threadUnexpectedException(ex);
634	<	}
635	<	}});
625	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
626	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
627	>	try (PoolCleaner cleaner = cleaner(executor)) {
628	>
629	>	executor.execute(new CheckedRunnable() {
630	>	public void realRun() throws InterruptedException {
631	>	assertNull(q.poll());
632	>	threadsStarted.await();
633	>	long startTime = System.nanoTime();
634	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
635	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
636	>	checkEmpty(q);
637	>	}});
638
639	<	executor.execute(new Runnable() {
640	<	public void run() {
641	<	try {
688	<	Thread.sleep(SMALL_DELAY_MS);
639	>	executor.execute(new CheckedRunnable() {
640	>	public void realRun() throws InterruptedException {
641	>	threadsStarted.await();
642		q.put(one);
643	<	} catch (Throwable ex) {
691	<	threadUnexpectedException(ex);
692	<	}
693	<	}});
694	<
695	<	joinPool(executor);
696	<	}
697	<
698	<	/**
699	<	* A deserialized serialized queue has same elements in same order
700	<	*/
701	<	public void testSerialization() throws Exception {
702	<	LinkedTransferQueue q = populatedQueue(SIZE);
703	<
704	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
705	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
706	<	out.writeObject(q);
707	<	out.close();
708	<
709	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
710	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
711	<	LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
712	<
713	<	assertEquals(q.size(), r.size());
714	<	while (!q.isEmpty()) {
715	<	assertEquals(q.remove(), r.remove());
643	>	}});
644		}
645		}
646
647		/**
648	<	* drainTo(null) throws NullPointerException
648	>	* A deserialized/reserialized queue has same elements in same order
649		*/
650	<	public void testDrainToNull() {
651	<	LinkedTransferQueue q = populatedQueue(SIZE);
652	<	try {
725	<	q.drainTo(null);
726	<	shouldThrow();
727	<	} catch (NullPointerException success) {
728	<	}
729	<	}
650	>	public void testSerialization() throws Exception {
651	>	Queue x = populatedQueue(SIZE);
652	>	Queue y = serialClone(x);
653
654	<	/**
655	<	* drainTo(this) throws IllegalArgumentException
656	<	*/
657	<	public void testDrainToSelf() {
658	<	LinkedTransferQueue q = populatedQueue(SIZE);
659	<	try {
660	<	q.drainTo(q);
738	<	shouldThrow();
739	<	} catch (IllegalArgumentException success) {
654	>	assertNotSame(y, x);
655	>	assertEquals(x.size(), y.size());
656	>	assertEquals(x.toString(), y.toString());
657	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
658	>	while (!x.isEmpty()) {
659	>	assertFalse(y.isEmpty());
660	>	assertEquals(x.remove(), y.remove());
661		}
662	+	assertTrue(y.isEmpty());
663		}
664
665		/**
#	Line 747 | Line 669 | public class LinkedTransferQueueTest ext
669		LinkedTransferQueue q = populatedQueue(SIZE);
670		ArrayList l = new ArrayList();
671		q.drainTo(l);
672	<	assertEquals(q.size(), 0);
673	<	assertEquals(l.size(), SIZE);
672	>	assertEquals(0, q.size());
673	>	assertEquals(SIZE, l.size());
674		for (int i = 0; i < SIZE; ++i) {
675	<	assertEquals(l.get(i), i);
675	>	assertEquals(i, l.get(i));
676		}
677		q.add(zero);
678		q.add(one);
#	Line 759 | Line 681 | public class LinkedTransferQueueTest ext
681		assertTrue(q.contains(one));
682		l.clear();
683		q.drainTo(l);
684	<	assertEquals(q.size(), 0);
685	<	assertEquals(l.size(), 2);
684	>	assertEquals(0, q.size());
685	>	assertEquals(2, l.size());
686		for (int i = 0; i < 2; ++i) {
687	<	assertEquals(l.get(i), i);
687	>	assertEquals(i, l.get(i));
688		}
689		}
690
691		/**
692	<	* drainTo empties full queue, unblocking a waiting put.
692	>	* drainTo(c) empties full queue, unblocking a waiting put.
693		*/
694		public void testDrainToWithActivePut() throws InterruptedException {
695		final LinkedTransferQueue q = populatedQueue(SIZE);
696	<	Thread t = new Thread(new Runnable() {
697	<	public void run() {
698	<	try {
777	<	q.put(SIZE + 1);
778	<	} catch (Throwable ex) {
779	<	threadUnexpectedException(ex);
780	<	}
696	>	Thread t = newStartedThread(new CheckedRunnable() {
697	>	public void realRun() {
698	>	q.put(SIZE + 1);
699		}});
782	–	t.start();
700		ArrayList l = new ArrayList();
701		q.drainTo(l);
702		assertTrue(l.size() >= SIZE);
703	<	for (int i = 0; i < SIZE; ++i) {
704	<	assertEquals(l.get(i), i);
705	<	}
789	<	t.join();
703	>	for (int i = 0; i < SIZE; ++i)
704	>	assertEquals(i, l.get(i));
705	>	awaitTermination(t);
706		assertTrue(q.size() + l.size() >= SIZE);
707		}
708
709		/**
710	<	* drainTo(null, n) throws NullPointerException
795	<	*/
796	<	public void testDrainToNullN() {
797	<	LinkedTransferQueue q = populatedQueue(SIZE);
798	<	try {
799	<	q.drainTo(null, 0);
800	<	shouldThrow();
801	<	} catch (NullPointerException success) {
802	<	}
803	<	}
804	<
805	<	/**
806	<	* drainTo(this, n) throws IllegalArgumentException
807	<	*/
808	<	public void testDrainToSelfN() {
809	<	LinkedTransferQueue q = populatedQueue(SIZE);
810	<	try {
811	<	q.drainTo(q, 0);
812	<	shouldThrow();
813	<	} catch (IllegalArgumentException success) {
814	<	}
815	<	}
816	<
817	<	/**
818	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
710	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
711		*/
712		public void testDrainToN() {
713		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 826 | Line 718 | public class LinkedTransferQueueTest ext
718		ArrayList l = new ArrayList();
719		q.drainTo(l, i);
720		int k = (i < SIZE) ? i : SIZE;
721	<	assertEquals(l.size(), k);
722	<	assertEquals(q.size(), SIZE - k);
723	<	for (int j = 0; j < k; ++j) {
724	<	assertEquals(l.get(j), j);
725	<	}
834	<	while (q.poll() != null)
835	<	;
721	>	assertEquals(k, l.size());
722	>	assertEquals(SIZE - k, q.size());
723	>	for (int j = 0; j < k; ++j)
724	>	assertEquals(j, l.get(j));
725	>	do {} while (q.poll() != null);
726		}
727		}
728
729		/**
730	<	* poll and take should decrement the waiting consumer count
730	>	* timed poll() or take() increments the waiting consumer count;
731	>	* offer(e) decrements the waiting consumer count
732		*/
733		public void testWaitingConsumer() throws InterruptedException {
734		final LinkedTransferQueue q = new LinkedTransferQueue();
735	<	final ConsumerObserver waiting = new ConsumerObserver();
736	<	new Thread(new Runnable() {
737	<	public void run() {
738	<	try {
739	<	threadAssertTrue(q.hasWaitingConsumer());
740	<	waiting.setWaitingConsumer(q.getWaitingConsumerCount());
741	<	threadAssertTrue(q.offer(new Object()));
742	<	} catch (Throwable ex) {
743	<	threadUnexpectedException(ex);
744	<	}
745	<	}}).start();
746	<	assertTrue(q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS) != null);
747	<	assertTrue(q.getWaitingConsumerCount() < waiting.getWaitingConsumers());
735	>	assertEquals(0, q.getWaitingConsumerCount());
736	>	assertFalse(q.hasWaitingConsumer());
737	>	final CountDownLatch threadStarted = new CountDownLatch(1);
738	>
739	>	Thread t = newStartedThread(new CheckedRunnable() {
740	>	public void realRun() throws InterruptedException {
741	>	threadStarted.countDown();
742	>	long startTime = System.nanoTime();
743	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
744	>	assertEquals(0, q.getWaitingConsumerCount());
745	>	assertFalse(q.hasWaitingConsumer());
746	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
747	>	}});
748	>
749	>	threadStarted.await();
750	>	Callable<Boolean> oneConsumer
751	>	= new Callable<Boolean>() { public Boolean call() {
752	>	return q.hasWaitingConsumer()
753	>	&& q.getWaitingConsumerCount() == 1; }};
754	>	waitForThreadToEnterWaitState(t, oneConsumer);
755	>
756	>	assertTrue(q.offer(one));
757	>	assertEquals(0, q.getWaitingConsumerCount());
758	>	assertFalse(q.hasWaitingConsumer());
759	>
760	>	awaitTermination(t);
761		}
762
763		/**
#	Line 864 | Line 768 | public class LinkedTransferQueueTest ext
768		LinkedTransferQueue q = new LinkedTransferQueue();
769		q.transfer(null);
770		shouldThrow();
771	<	} catch (NullPointerException ex) {
868	<	}
771	>	} catch (NullPointerException success) {}
772		}
773
774		/**
775	<	* transfer attempts to insert into the queue then wait until that
776	<	* object is removed via take or poll.
775	>	* transfer waits until a poll occurs. The transferred element
776	>	* is returned by the associated poll.
777		*/
778		public void testTransfer2() throws InterruptedException {
779	<	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
779	>	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
780	>	final CountDownLatch threadStarted = new CountDownLatch(1);
781
782	<	new Thread(new Runnable() {
783	<	public void run() {
784	<	try {
785	<	q.transfer(SIZE);
786	<	threadAssertTrue(q.isEmpty());
787	<	} catch (Throwable ex) {
884	<	threadUnexpectedException(ex);
885	<	}
886	<	}}).start();
782	>	Thread t = newStartedThread(new CheckedRunnable() {
783	>	public void realRun() throws InterruptedException {
784	>	threadStarted.countDown();
785	>	q.transfer(five);
786	>	checkEmpty(q);
787	>	}});
788
789	<	Thread.sleep(SHORT_DELAY_MS);
790	<	assertEquals(1, q.size());
791	<	assertEquals(SIZE, (int) q.poll());
792	<	assertTrue(q.isEmpty());
789	>	threadStarted.await();
790	>	Callable<Boolean> oneElement
791	>	= new Callable<Boolean>() { public Boolean call() {
792	>	return !q.isEmpty() && q.size() == 1; }};
793	>	waitForThreadToEnterWaitState(t, oneElement);
794	>
795	>	assertSame(five, q.poll());
796	>	checkEmpty(q);
797	>	awaitTermination(t);
798		}
799
800		/**
801	<	* transfer will attempt to transfer in fifo order and continue
896	<	* waiting if the element being transfered is not polled or taken
801	>	* transfer waits until a poll occurs, and then transfers in fifo order
802		*/
803		public void testTransfer3() throws InterruptedException {
804	<	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
804	>	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
805
806	<	Thread first =
807	<	new Thread(new Runnable() {
808	<	public void run() {
809	<	try {
810	<	Integer i = SIZE + 1;
811	<	q.transfer(i);
907	<	threadAssertTrue(!q.contains(i));
908	<	threadAssertEquals(1, q.size());
909	<	} catch (Throwable ex) {
910	<	threadUnexpectedException(ex);
911	<	}
912	<	}});
913	<	first.start();
806	>	Thread first = newStartedThread(new CheckedRunnable() {
807	>	public void realRun() throws InterruptedException {
808	>	q.transfer(four);
809	>	assertFalse(q.contains(four));
810	>	assertEquals(1, q.size());
811	>	}});
812
813	<	Thread interruptedThread =
814	<	new Thread(new Runnable() {
815	<	public void run() {
816	<	try {
817	<	while (q.size() == 0)
818	<	Thread.yield();
921	<	q.transfer(SIZE);
922	<	threadShouldThrow();
923	<	} catch (InterruptedException success) {
924	<	} catch (Throwable ex) {
925	<	threadUnexpectedException(ex);
926	<	}
813	>	Thread interruptedThread = newStartedThread(
814	>	new CheckedInterruptedRunnable() {
815	>	public void realRun() throws InterruptedException {
816	>	while (q.isEmpty())
817	>	Thread.yield();
818	>	q.transfer(five);
819		}});
928	–	interruptedThread.start();
820
821		while (q.size() < 2)
822		Thread.yield();
823		assertEquals(2, q.size());
824	<	assertEquals(SIZE + 1, (int) q.poll());
824	>	assertSame(four, q.poll());
825		first.join();
826		assertEquals(1, q.size());
827		interruptedThread.interrupt();
828		interruptedThread.join();
829	<	assertEquals(0, q.size());
939	<	assertTrue(q.isEmpty());
829	>	checkEmpty(q);
830		}
831
832		/**
833	<	* transfer will wait as long as a poll or take occurs if one does occur
834	<	* the waiting is finished and the thread that tries to poll/take
945	<	* wins in retrieving the element
833	>	* transfer waits until a poll occurs, at which point the polling
834	>	* thread returns the element
835		*/
836		public void testTransfer4() throws InterruptedException {
837		final LinkedTransferQueue q = new LinkedTransferQueue();
838	<	new Thread(new Runnable() {
839	<	public void run() {
840	<	try {
841	<	q.transfer(four);
842	<	threadAssertFalse(q.contains(four));
843	<	threadAssertEquals(three, q.poll());
844	<	} catch (Throwable ex) {
845	<	threadUnexpectedException(ex);
846	<	}
847	<	}}).start();
848	<	Thread.sleep(MEDIUM_DELAY_MS);
838	>
839	>	Thread t = newStartedThread(new CheckedRunnable() {
840	>	public void realRun() throws InterruptedException {
841	>	q.transfer(four);
842	>	assertFalse(q.contains(four));
843	>	assertSame(three, q.poll());
844	>	}});
845	>
846	>	while (q.isEmpty())
847	>	Thread.yield();
848	>	assertFalse(q.isEmpty());
849	>	assertEquals(1, q.size());
850		assertTrue(q.offer(three));
851	<	assertEquals(four, q.poll());
851	>	assertSame(four, q.poll());
852	>	awaitTermination(t);
853	>	}
854	>
855	>	/**
856	>	* transfer waits until a take occurs. The transferred element
857	>	* is returned by the associated take.
858	>	*/
859	>	public void testTransfer5() throws InterruptedException {
860	>	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
861	>
862	>	Thread t = newStartedThread(new CheckedRunnable() {
863	>	public void realRun() throws InterruptedException {
864	>	q.transfer(four);
865	>	checkEmpty(q);
866	>	}});
867	>
868	>	while (q.isEmpty())
869	>	Thread.yield();
870	>	assertFalse(q.isEmpty());
871	>	assertEquals(1, q.size());
872	>	assertSame(four, q.take());
873	>	checkEmpty(q);
874	>	awaitTermination(t);
875		}
876
877		/**
878		* tryTransfer(null) throws NullPointerException
879		*/
880		public void testTryTransfer1() {
881	+	final LinkedTransferQueue q = new LinkedTransferQueue();
882		try {
969	–	final LinkedTransferQueue q = new LinkedTransferQueue();
883		q.tryTransfer(null);
884	<	this.shouldThrow();
885	<	} catch (NullPointerException ex) {
973	<	}
884	>	shouldThrow();
885	>	} catch (NullPointerException success) {}
886		}
887
888		/**
889		* tryTransfer returns false and does not enqueue if there are no
890		* consumers waiting to poll or take.
891		*/
892	<	public void testTryTransfer2() {
892	>	public void testTryTransfer2() throws InterruptedException {
893		final LinkedTransferQueue q = new LinkedTransferQueue();
894		assertFalse(q.tryTransfer(new Object()));
895		assertFalse(q.hasWaitingConsumer());
896	<	assertTrue(q.isEmpty());
985	<	assertEquals(0, q.size());
896	>	checkEmpty(q);
897		}
898
899		/**
#	Line 992 | Line 903 | public class LinkedTransferQueueTest ext
903		public void testTryTransfer3() throws InterruptedException {
904		final Object hotPotato = new Object();
905		final LinkedTransferQueue q = new LinkedTransferQueue();
906	<	new Thread(new Runnable() {
907	<	public void run() {
908	<	try {
909	<	while (! q.hasWaitingConsumer())
910	<	Thread.yield();
911	<	threadAssertTrue(q.hasWaitingConsumer());
912	<	threadAssertTrue(q.isEmpty());
913	<	threadAssertTrue(q.size() == 0);
914	<	threadAssertTrue(q.tryTransfer(hotPotato));
915	<	} catch (Throwable ex) {
916	<	threadUnexpectedException(ex);
917	<	}
918	<	}}).start();
919	<	assertTrue(q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS) == hotPotato);
920	<	assertTrue(q.isEmpty());
906	>
907	>	Thread t = newStartedThread(new CheckedRunnable() {
908	>	public void realRun() {
909	>	while (! q.hasWaitingConsumer())
910	>	Thread.yield();
911	>	assertTrue(q.hasWaitingConsumer());
912	>	checkEmpty(q);
913	>	assertTrue(q.tryTransfer(hotPotato));
914	>	}});
915	>
916	>	long startTime = System.nanoTime();
917	>	assertSame(hotPotato, q.poll(LONG_DELAY_MS, MILLISECONDS));
918	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
919	>	checkEmpty(q);
920	>	awaitTermination(t);
921		}
922
923		/**
#	Line 1016 | Line 927 | public class LinkedTransferQueueTest ext
927		public void testTryTransfer4() throws InterruptedException {
928		final Object hotPotato = new Object();
929		final LinkedTransferQueue q = new LinkedTransferQueue();
930	<	new Thread(new Runnable() {
931	<	public void run() {
932	<	try {
933	<	while (! q.hasWaitingConsumer())
934	<	Thread.yield();
935	<	threadAssertTrue(q.hasWaitingConsumer());
936	<	threadAssertTrue(q.isEmpty());
937	<	threadAssertTrue(q.size() == 0);
938	<	threadAssertTrue(q.tryTransfer(hotPotato));
939	<	} catch (Throwable ex) {
940	<	threadUnexpectedException(ex);
941	<	}
942	<	}}).start();
1032	<	assertTrue(q.take() == hotPotato);
1033	<	assertTrue(q.isEmpty());
930	>
931	>	Thread t = newStartedThread(new CheckedRunnable() {
932	>	public void realRun() {
933	>	while (! q.hasWaitingConsumer())
934	>	Thread.yield();
935	>	assertTrue(q.hasWaitingConsumer());
936	>	checkEmpty(q);
937	>	assertTrue(q.tryTransfer(hotPotato));
938	>	}});
939	>
940	>	assertSame(q.take(), hotPotato);
941	>	checkEmpty(q);
942	>	awaitTermination(t);
943		}
944
945		/**
946	<	* tryTransfer waits the amount given if interrupted, show an
1038	<	* interrupted exception
946	>	* tryTransfer blocks interruptibly if no takers
947		*/
948		public void testTryTransfer5() throws InterruptedException {
949		final LinkedTransferQueue q = new LinkedTransferQueue();
950	<	Thread toInterrupt = new Thread(new Runnable() {
951	<	public void run() {
950	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
951	>	assertTrue(q.isEmpty());
952	>
953	>	Thread t = newStartedThread(new CheckedRunnable() {
954	>	public void realRun() throws InterruptedException {
955	>	long startTime = System.nanoTime();
956	>	Thread.currentThread().interrupt();
957		try {
958	<	q.tryTransfer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
959	<	threadShouldThrow();
960	<	} catch (InterruptedException success) {
961	<	} catch (Throwable ex) {
962	<	threadUnexpectedException(ex);
963	<	}
958	>	q.tryTransfer(new Object(), randomTimeout(), randomTimeUnit());
959	>	shouldThrow();
960	>	} catch (InterruptedException success) {}
961	>	assertFalse(Thread.interrupted());
962	>
963	>	pleaseInterrupt.countDown();
964	>	try {
965	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
966	>	shouldThrow();
967	>	} catch (InterruptedException success) {}
968	>	assertFalse(Thread.interrupted());
969	>
970	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
971		}});
972	<	toInterrupt.start();
973	<	Thread.sleep(SMALL_DELAY_MS);
974	<	toInterrupt.interrupt();
972	>
973	>	await(pleaseInterrupt);
974	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
975	>	t.interrupt();
976	>	awaitTermination(t);
977	>	checkEmpty(q);
978		}
979
980		/**
981	<	* tryTransfer gives up after the timeout and return false
981	>	* tryTransfer gives up after the timeout and returns false
982		*/
983		public void testTryTransfer6() throws InterruptedException {
984		final LinkedTransferQueue q = new LinkedTransferQueue();
985	<	new Thread(new Runnable() {
986	<	public void run() {
987	<	try {
988	<	threadAssertFalse(q.tryTransfer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
989	<	} catch (Throwable ex) {
990	<	threadUnexpectedException(ex);
991	<	}
992	<	}}).start();
993	<	Thread.sleep(LONG_DELAY_MS);
994	<	assertTrue(q.isEmpty());
985	>
986	>	Thread t = newStartedThread(new CheckedRunnable() {
987	>	public void realRun() throws InterruptedException {
988	>	long startTime = System.nanoTime();
989	>	assertFalse(q.tryTransfer(new Object(),
990	>	timeoutMillis(), MILLISECONDS));
991	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
992	>	checkEmpty(q);
993	>	}});
994	>
995	>	awaitTermination(t);
996	>	checkEmpty(q);
997		}
998
999		/**
#	Line 1078 | Line 1003 | public class LinkedTransferQueueTest ext
1003		public void testTryTransfer7() throws InterruptedException {
1004		final LinkedTransferQueue q = new LinkedTransferQueue();
1005		assertTrue(q.offer(four));
1006	<	new Thread(new Runnable() {
1007	<	public void run() {
1008	<	try {
1009	<	threadAssertTrue(q.tryTransfer(five, LONG_DELAY_MS, TimeUnit.MILLISECONDS));
1010	<	threadAssertTrue(q.isEmpty());
1011	<	} catch (Throwable ex) {
1012	<	threadUnexpectedException(ex);
1013	<	}
1014	<	}}).start();
1015	<	Thread.sleep(SHORT_DELAY_MS);
1006	>
1007	>	Thread t = newStartedThread(new CheckedRunnable() {
1008	>	public void realRun() throws InterruptedException {
1009	>	long startTime = System.nanoTime();
1010	>	assertTrue(q.tryTransfer(five, LONG_DELAY_MS, MILLISECONDS));
1011	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1012	>	checkEmpty(q);
1013	>	}});
1014	>
1015	>	while (q.size() != 2)
1016	>	Thread.yield();
1017		assertEquals(2, q.size());
1018	<	assertEquals(four, q.poll());
1019	<	assertEquals(five, q.poll());
1020	<	assertTrue(q.isEmpty());
1018	>	assertSame(four, q.poll());
1019	>	assertSame(five, q.poll());
1020	>	checkEmpty(q);
1021	>	awaitTermination(t);
1022		}
1023
1024		/**
1025	<	* tryTransfer attempts to enqueue into the q and fails returning
1026	<	* false not enqueueing and the successive poll is null
1025	>	* tryTransfer attempts to enqueue into the queue and fails
1026	>	* returning false not enqueueing and the successive poll is null
1027		*/
1028		public void testTryTransfer8() throws InterruptedException {
1029		final LinkedTransferQueue q = new LinkedTransferQueue();
1030		assertTrue(q.offer(four));
1031		assertEquals(1, q.size());
1032	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
1032	>	long startTime = System.nanoTime();
1033	>	assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
1034	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
1035		assertEquals(1, q.size());
1036	<	assertEquals(four, q.poll());
1108	<	threadAssertTrue(q.isEmpty());
1036	>	assertSame(four, q.poll());
1037		assertNull(q.poll());
1038	+	checkEmpty(q);
1039		}
1040
1041		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1042	<	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1043	<	assertTrue(q.isEmpty());
1042	>	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
1043	>	checkEmpty(q);
1044		for (int i = 0; i < n; i++) {
1045		assertEquals(i, q.size());
1046		assertTrue(q.offer(i));
#	Line 1121 | Line 1050 | public class LinkedTransferQueueTest ext
1050		return q;
1051		}
1052
1053	<	private static class ConsumerObserver {
1054	<
1055	<	private int waitingConsumers;
1056	<
1057	<	private ConsumerObserver() {
1058	<	}
1059	<
1060	<	private void setWaitingConsumer(int i) {
1061	<	this.waitingConsumers = i;
1062	<	}
1063	<
1064	<	private int getWaitingConsumers() {
1136	<	return waitingConsumers;
1053	>	/**
1054	>	* remove(null), contains(null) always return false
1055	>	*/
1056	>	public void testNeverContainsNull() {
1057	>	Collection<?>[] qs = {
1058	>	new LinkedTransferQueue<Object>(),
1059	>	populatedQueue(2),
1060	>	};
1061	>
1062	>	for (Collection<?> q : qs) {
1063	>	assertFalse(q.contains(null));
1064	>	assertFalse(q.remove(null));
1065		}
1066		}
1067		}

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