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

Comparing jsr166/src/test/tck/LinkedTransferQueueTest.java (file contents):
Revision 1.6 by dl, Sun Aug 2 12:31:24 2009 UTC vs.
Revision 1.69 by jsr166, Sat Feb 18 01:17:06 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.*;
16	>	import java.util.Queue;
17	>	import java.util.concurrent.BlockingQueue;
18	>	import java.util.concurrent.CountDownLatch;
19	>	import java.util.concurrent.Executors;
20	>	import java.util.concurrent.ExecutorService;
21	>	import java.util.concurrent.LinkedTransferQueue;
22	>
23		import junit.framework.Test;
21	–	import junit.framework.TestSuite;
24
25	+	@SuppressWarnings({"unchecked", "rawtypes"})
26		public class LinkedTransferQueueTest extends JSR166TestCase {
27	+	public static class Generic extends BlockingQueueTest {
28	+	protected BlockingQueue emptyCollection() {
29	+	return new LinkedTransferQueue();
30	+	}
31	+	}
32
33		public static void main(String[] args) {
34	<	junit.textui.TestRunner.run(suite());
34	>	main(suite(), args);
35		}
36
37		public static Test suite() {
38	<	return new TestSuite(LinkedTransferQueueTest.class);
38	>	class Implementation implements CollectionImplementation {
39	>	public Class<?> klazz() { return LinkedTransferQueue.class; }
40	>	public Collection emptyCollection() { return new LinkedTransferQueue(); }
41	>	public Object makeElement(int i) { return i; }
42	>	public boolean isConcurrent() { return true; }
43	>	public boolean permitsNulls() { return false; }
44	>	}
45	>	return newTestSuite(LinkedTransferQueueTest.class,
46	>	new Generic().testSuite(),
47	>	CollectionTest.testSuite(new Implementation()));
48		}
49
50		/**
51	<	* Constructor builds new queue with size being zero and empty being true
51	>	* Constructor builds new queue with size being zero and empty
52	>	* being true
53		*/
54		public void testConstructor1() {
55		assertEquals(0, new LinkedTransferQueue().size());
#	Line 39 | Line 57 | public class LinkedTransferQueueTest ext
57		}
58
59		/**
60	<	* Initializing constructor with null collection throws NullPointerException
60	>	* Initializing constructor with null collection throws
61	>	* NullPointerException
62		*/
63		public void testConstructor2() {
64		try {
65		new LinkedTransferQueue(null);
66		shouldThrow();
67	<	} catch (NullPointerException success) {
49	<	}
67	>	} catch (NullPointerException success) {}
68		}
69
70		/**
71	<	* Initializing from Collection of null elements throws NullPointerException
71	>	* Initializing from Collection of null elements throws
72	>	* NullPointerException
73		*/
74		public void testConstructor3() {
75	+	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
76		try {
77	<	Integer[] ints = new Integer[SIZE];
58	<	LinkedTransferQueue q = new LinkedTransferQueue(Arrays.asList(ints));
77	>	new LinkedTransferQueue(elements);
78		shouldThrow();
79	<	} catch (NullPointerException success) {
61	<	}
79	>	} catch (NullPointerException success) {}
80		}
81
82		/**
#	Line 66 | Line 84 | public class LinkedTransferQueueTest ext
84		* throws NullPointerException
85		*/
86		public void testConstructor4() {
87	+	Integer[] ints = new Integer[SIZE];
88	+	for (int i = 0; i < SIZE - 1; ++i)
89	+	ints[i] = i;
90	+	Collection<Integer> elements = Arrays.asList(ints);
91		try {
92	<	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));
92	>	new LinkedTransferQueue(elements);
93		shouldThrow();
94	<	} catch (NullPointerException success) {
77	<	}
94	>	} catch (NullPointerException success) {}
95		}
96
97		/**
98		* Queue contains all elements of the collection it is initialized by
99		*/
100		public void testConstructor5() {
101	<	try {
102	<	Integer[] ints = new Integer[SIZE];
103	<	for (int i = 0; i < SIZE; ++i) {
104	<	ints[i] = i;
105	<	}
106	<	LinkedTransferQueue q = new LinkedTransferQueue(Arrays.asList(ints));
107	<	for (int i = 0; i < SIZE; ++i) {
108	<	assertEquals(ints[i], q.poll());
109	<	}
110	<	} finally {
101	>	Integer[] ints = new Integer[SIZE];
102	>	for (int i = 0; i < SIZE; ++i) {
103	>	ints[i] = i;
104	>	}
105	>	List intList = Arrays.asList(ints);
106	>	LinkedTransferQueue q
107	>	= new LinkedTransferQueue(intList);
108	>	assertEquals(q.size(), intList.size());
109	>	assertEquals(q.toString(), intList.toString());
110	>	assertTrue(Arrays.equals(q.toArray(),
111	>	intList.toArray()));
112	>	assertTrue(Arrays.equals(q.toArray(new Object[0]),
113	>	intList.toArray(new Object[0])));
114	>	assertTrue(Arrays.equals(q.toArray(new Object[SIZE]),
115	>	intList.toArray(new Object[SIZE])));
116	>	for (int i = 0; i < SIZE; ++i) {
117	>	assertEquals(ints[i], q.poll());
118		}
119		}
120
121		/**
122	<	* Remaining capacity never decrease nor increase on add or remove
122	>	* remainingCapacity() always returns Integer.MAX_VALUE
123		*/
124		public void testRemainingCapacity() {
125	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
125	>	BlockingQueue q = populatedQueue(SIZE);
126		for (int i = 0; i < SIZE; ++i) {
127		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
128		assertEquals(SIZE - i, q.size());
129	<	q.remove();
129	>	assertEquals(i, q.remove());
130		}
131		for (int i = 0; i < SIZE; ++i) {
132		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
133		assertEquals(i, q.size());
134	<	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) {
134	>	assertTrue(q.add(i));
135		}
136		}
137
#	Line 151 | Line 139 | public class LinkedTransferQueueTest ext
139		* addAll(this) throws IllegalArgumentException
140		*/
141		public void testAddAllSelf() {
142	+	LinkedTransferQueue q = populatedQueue(SIZE);
143		try {
155	–	LinkedTransferQueue q = populatedQueue(SIZE);
144		q.addAll(q);
145		shouldThrow();
146	<	} catch (IllegalArgumentException success) {
159	<	}
146	>	} catch (IllegalArgumentException success) {}
147		}
148
149		/**
150	<	* addAll of a collection with null elements throws NullPointerException
151	<	*/
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	<	}
173	<	}
174	<
175	<	/**
176	<	* addAll of a collection with any null elements throws NullPointerException after
177	<	* possibly adding some elements
150	>	* addAll of a collection with any null elements throws
151	>	* NullPointerException after possibly adding some elements
152		*/
153		public void testAddAll3() {
154	+	LinkedTransferQueue q = new LinkedTransferQueue();
155	+	Integer[] ints = new Integer[SIZE];
156	+	for (int i = 0; i < SIZE - 1; ++i)
157	+	ints[i] = i;
158		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	–	}
159		q.addAll(Arrays.asList(ints));
160		shouldThrow();
161	<	} catch (NullPointerException success) {
189	<	}
161	>	} catch (NullPointerException success) {}
162		}
163
164		/**
#	Line 207 | Line 179 | public class LinkedTransferQueueTest ext
179		}
180
181		/**
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	–	/**
182		* all elements successfully put are contained
183		*/
184		public void testPut() {
185	<	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
185	>	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
186		for (int i = 0; i < SIZE; ++i) {
187	+	assertEquals(i, q.size());
188		q.put(i);
189		assertTrue(q.contains(i));
190		}
229	–	assertEquals(q.size(), SIZE);
191		}
192
193		/**
#	Line 240 | Line 201 | public class LinkedTransferQueueTest ext
201		}
202
203		/**
204	<	* take blocks interruptibly when empty
204	>	* take removes existing elements until empty, then blocks interruptibly
205		*/
206	<	public void testTakeFromEmpty() throws InterruptedException {
207	<	final LinkedTransferQueue q = new LinkedTransferQueue();
208	<	Thread t = new Thread(new Runnable() {
209	<	public void run() {
206	>	public void testBlockingTake() throws InterruptedException {
207	>	final BlockingQueue q = populatedQueue(SIZE);
208	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
209	>	Thread t = newStartedThread(new CheckedRunnable() {
210	>	public void realRun() throws InterruptedException {
211	>	for (int i = 0; i < SIZE; ++i) {
212	>	assertEquals(i, q.take());
213	>	}
214	>
215	>	Thread.currentThread().interrupt();
216		try {
217		q.take();
218	<	threadShouldThrow();
219	<	} catch (InterruptedException success) {
220	<	} catch (Throwable ex) {
254	<	threadUnexpectedException(ex);
255	<	}
256	<	}});
257	<	t.start();
258	<	Thread.sleep(SHORT_DELAY_MS);
259	<	t.interrupt();
260	<	t.join();
261	<	}
218	>	shouldThrow();
219	>	} catch (InterruptedException success) {}
220	>	assertFalse(Thread.interrupted());
221
222	<	/**
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() {
222	>	pleaseInterrupt.countDown();
223		try {
270	–	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
271	–	for (int i = 0; i < SIZE; ++i) {
272	–	threadAssertEquals(i, (int) q.take());
273	–	}
224		q.take();
225	<	threadShouldThrow();
226	<	} catch (InterruptedException success) {
227	<	} catch (Throwable ex) {
278	<	threadUnexpectedException(ex);
279	<	}
225	>	shouldThrow();
226	>	} catch (InterruptedException success) {}
227	>	assertFalse(Thread.interrupted());
228		}});
229	<	t.start();
230	<	Thread.sleep(SHORT_DELAY_MS);
229	>
230	>	await(pleaseInterrupt);
231	>	assertThreadStaysAlive(t);
232		t.interrupt();
233	<	t.join();
233	>	awaitTermination(t);
234		}
235
236		/**
237		* poll succeeds unless empty
238		*/
239	<	public void testPoll() {
239	>	public void testPoll() throws InterruptedException {
240		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
241		for (int i = 0; i < SIZE; ++i) {
242		assertEquals(i, (int) q.poll());
243		}
244		assertNull(q.poll());
245	+	checkEmpty(q);
246		}
247
248		/**
249	<	* timed pool with zero timeout succeeds when non-empty, else times out
249	>	* timed poll with zero timeout succeeds when non-empty, else times out
250		*/
251		public void testTimedPoll0() throws InterruptedException {
252		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
253		for (int i = 0; i < SIZE; ++i) {
254	<	assertEquals(i, (int) q.poll(0, TimeUnit.MILLISECONDS));
254	>	assertEquals(i, (int) q.poll(0, MILLISECONDS));
255		}
256	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
256	>	assertNull(q.poll(0, MILLISECONDS));
257	>	checkEmpty(q);
258		}
259
260		/**
261	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
261	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
262		*/
263		public void testTimedPoll() throws InterruptedException {
264		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
265	<	for (int i = 0; i < SIZE; ++i) {
266	<	assertEquals(i, (int) q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
267	<	}
268	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
265	>	long startTime = System.nanoTime();
266	>	for (int i = 0; i < SIZE; ++i)
267	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
268	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
269	>
270	>	startTime = System.nanoTime();
271	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
272	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
273	>	checkEmpty(q);
274		}
275
276		/**
#	Line 322 | Line 278 | public class LinkedTransferQueueTest ext
278		* returning timeout status
279		*/
280		public void testInterruptedTimedPoll() throws InterruptedException {
281	<	Thread t = new Thread(new Runnable() {
282	<	public void run() {
281	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
282	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
283	>	Thread t = newStartedThread(new CheckedRunnable() {
284	>	public void realRun() throws InterruptedException {
285	>	long startTime = System.nanoTime();
286	>	for (int i = 0; i < SIZE; ++i)
287	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
288	>	aboutToWait.countDown();
289		try {
290	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
291	<	for (int i = 0; i < SIZE; ++i) {
292	<	threadAssertEquals(i, (int) q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
293	<	}
332	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
333	<	} catch (InterruptedException success) {
334	<	} catch (Throwable ex) {
335	<	threadUnexpectedException(ex);
336	<	}
290	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
291	>	shouldThrow();
292	>	} catch (InterruptedException success) {}
293	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
294		}});
295	<	t.start();
296	<	Thread.sleep(SHORT_DELAY_MS);
295	>
296	>	aboutToWait.await();
297	>	waitForThreadToEnterWaitState(t);
298		t.interrupt();
299	<	t.join();
299	>	awaitTermination(t);
300	>	checkEmpty(q);
301		}
302
303		/**
304	<	* timed poll before a delayed offer fails; after offer succeeds;
305	<	* on interruption throws
304	>	* timed poll after thread interrupted throws InterruptedException
305	>	* instead of returning timeout status
306		*/
307	<	public void testTimedPollWithOffer() throws InterruptedException {
308	<	final LinkedTransferQueue q = new LinkedTransferQueue();
309	<	Thread t = new Thread(new Runnable() {
310	<	public void run() {
307	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
308	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
309	>	Thread t = newStartedThread(new CheckedRunnable() {
310	>	public void realRun() throws InterruptedException {
311	>	long startTime = System.nanoTime();
312	>	Thread.currentThread().interrupt();
313	>	for (int i = 0; i < SIZE; ++i)
314	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
315		try {
316	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
317	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
318	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
319	<	threadShouldThrow();
357	<	} catch (InterruptedException success) {
358	<	} catch (Throwable ex) {
359	<	threadUnexpectedException(ex);
360	<	}
316	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
317	>	shouldThrow();
318	>	} catch (InterruptedException success) {}
319	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
320		}});
321	<	t.start();
322	<	Thread.sleep(SMALL_DELAY_MS);
323	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
365	<	t.interrupt();
366	<	t.join();
321	>
322	>	awaitTermination(t);
323	>	checkEmpty(q);
324		}
325
326		/**
327		* peek returns next element, or null if empty
328		*/
329	<	public void testPeek() {
329	>	public void testPeek() throws InterruptedException {
330		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
331		for (int i = 0; i < SIZE; ++i) {
332		assertEquals(i, (int) q.peek());
#	Line 378 | Line 335 | public class LinkedTransferQueueTest ext
335		i != (int) q.peek());
336		}
337		assertNull(q.peek());
338	+	checkEmpty(q);
339		}
340
341		/**
342		* element returns next element, or throws NoSuchElementException if empty
343		*/
344	<	public void testElement() {
344	>	public void testElement() throws InterruptedException {
345		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
346		for (int i = 0; i < SIZE; ++i) {
347		assertEquals(i, (int) q.element());
#	Line 392 | Line 350 | public class LinkedTransferQueueTest ext
350		try {
351		q.element();
352		shouldThrow();
353	<	} catch (NoSuchElementException success) {
354	<	}
353	>	} catch (NoSuchElementException success) {}
354	>	checkEmpty(q);
355		}
356
357		/**
358		* remove removes next element, or throws NoSuchElementException if empty
359		*/
360	<	public void testRemove() {
360	>	public void testRemove() throws InterruptedException {
361		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
362		for (int i = 0; i < SIZE; ++i) {
363		assertEquals(i, (int) q.remove());
#	Line 407 | Line 365 | public class LinkedTransferQueueTest ext
365		try {
366		q.remove();
367		shouldThrow();
368	<	} catch (NoSuchElementException success) {
369	<	}
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());
368	>	} catch (NoSuchElementException success) {}
369	>	checkEmpty(q);
370		}
371
372		/**
#	Line 436 | Line 379 | public class LinkedTransferQueueTest ext
379		assertTrue(q.remove(one));
380		assertTrue(q.remove(two));
381		assertTrue(q.add(three));
382	<	assertTrue(q.take() != null);
382	>	assertSame(q.take(), three);
383		}
384
385		/**
#	Line 454 | Line 397 | public class LinkedTransferQueueTest ext
397		/**
398		* clear removes all elements
399		*/
400	<	public void testClear() {
400	>	public void testClear() throws InterruptedException {
401		LinkedTransferQueue q = populatedQueue(SIZE);
402		q.clear();
403	<	assertTrue(q.isEmpty());
461	<	assertEquals(0, q.size());
403	>	checkEmpty(q);
404		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
405		q.add(one);
406		assertFalse(q.isEmpty());
407	+	assertEquals(1, q.size());
408		assertTrue(q.contains(one));
409		q.clear();
410	<	assertTrue(q.isEmpty());
410	>	checkEmpty(q);
411		}
412
413		/**
#	Line 472 | Line 415 | public class LinkedTransferQueueTest ext
415		*/
416		public void testContainsAll() {
417		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
418	<	LinkedTransferQueue<Integer> p = new LinkedTransferQueue<Integer>();
418	>	LinkedTransferQueue<Integer> p = new LinkedTransferQueue<>();
419		for (int i = 0; i < SIZE; ++i) {
420		assertTrue(q.containsAll(p));
421		assertFalse(p.containsAll(q));
#	Line 482 | Line 425 | public class LinkedTransferQueueTest ext
425		}
426
427		/**
428	<	* retainAll(c) retains only those elements of c and reports true if changed
428	>	* retainAll(c) retains only those elements of c and reports true
429	>	* if changed
430		*/
431		public void testRetainAll() {
432		LinkedTransferQueue q = populatedQueue(SIZE);
#	Line 501 | Line 445 | public class LinkedTransferQueueTest ext
445		}
446
447		/**
448	<	* removeAll(c) removes only those elements of c and reports true if changed
448	>	* removeAll(c) removes only those elements of c and reports true
449	>	* if changed
450		*/
451		public void testRemoveAll() {
452		for (int i = 1; i < SIZE; ++i) {
#	Line 516 | Line 461 | public class LinkedTransferQueueTest ext
461		}
462
463		/**
464	<	* toArray contains all elements
464	>	* toArray() contains all elements in FIFO order
465		*/
466	<	public void testToArray() throws InterruptedException {
466	>	public void testToArray() {
467		LinkedTransferQueue q = populatedQueue(SIZE);
468		Object[] o = q.toArray();
469		for (int i = 0; i < o.length; i++) {
470	<	assertEquals(o[i], q.take());
470	>	assertSame(o[i], q.poll());
471		}
472		}
473
474		/**
475	<	* toArray(a) contains all elements
475	>	* toArray(a) contains all elements in FIFO order
476		*/
477	<	public void testToArray2() throws InterruptedException {
477	>	public void testToArray2() {
478		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
479		Integer[] ints = new Integer[SIZE];
480	<	ints = q.toArray(ints);
480	>	Integer[] array = q.toArray(ints);
481	>	assertSame(ints, array);
482		for (int i = 0; i < ints.length; i++) {
483	<	assertEquals(ints[i], q.take());
483	>	assertSame(ints[i], q.poll());
484		}
485		}
486
487		/**
488	<	* 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	<	}
551	<	}
552	<
553	<	/**
554	<	* toArray with incompatible array type throws CCE
488	>	* toArray(incompatible array type) throws ArrayStoreException
489		*/
490		public void testToArray1_BadArg() {
491	+	LinkedTransferQueue q = populatedQueue(SIZE);
492		try {
493	<	LinkedTransferQueue q = populatedQueue(SIZE);
559	<	Object o[] = q.toArray(new String[10]);
493	>	q.toArray(new String[10]);
494		shouldThrow();
495	<	} catch (ArrayStoreException success) {
562	<	}
495	>	} catch (ArrayStoreException success) {}
496		}
497
498		/**
#	Line 568 | Line 501 | public class LinkedTransferQueueTest ext
501		public void testIterator() throws InterruptedException {
502		LinkedTransferQueue q = populatedQueue(SIZE);
503		Iterator it = q.iterator();
504	<	while (it.hasNext()) {
504	>	int i;
505	>	for (i = 0; it.hasNext(); i++)
506	>	assertTrue(q.contains(it.next()));
507	>	assertEquals(i, SIZE);
508	>	assertIteratorExhausted(it);
509	>
510	>	it = q.iterator();
511	>	for (i = 0; it.hasNext(); i++)
512		assertEquals(it.next(), q.take());
513	<	}
513	>	assertEquals(i, SIZE);
514	>	assertIteratorExhausted(it);
515		}
516
517		/**
518	<	* iterator.remove removes current element
518	>	* iterator of empty collection has no elements
519	>	*/
520	>	public void testEmptyIterator() {
521	>	assertIteratorExhausted(new LinkedTransferQueue().iterator());
522	>	}
523	>
524	>	/**
525	>	* iterator.remove() removes current element
526		*/
527		public void testIteratorRemove() {
528		final LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 587 | Line 535 | public class LinkedTransferQueueTest ext
535		it.remove();
536
537		it = q.iterator();
538	<	assertEquals(it.next(), one);
539	<	assertEquals(it.next(), three);
538	>	assertSame(it.next(), one);
539	>	assertSame(it.next(), three);
540		assertFalse(it.hasNext());
541		}
542
#	Line 596 | Line 544 | public class LinkedTransferQueueTest ext
544		* iterator ordering is FIFO
545		*/
546		public void testIteratorOrdering() {
547	<	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
547	>	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
548		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
549		q.add(one);
550		q.add(two);
#	Line 631 | Line 579 | public class LinkedTransferQueueTest ext
579		LinkedTransferQueue q = populatedQueue(SIZE);
580		String s = q.toString();
581		for (int i = 0; i < SIZE; ++i) {
582	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
582	>	assertTrue(s.contains(String.valueOf(i)));
583		}
584		}
585
#	Line 640 | Line 588 | public class LinkedTransferQueueTest ext
588		*/
589		public void testOfferInExecutor() {
590		final LinkedTransferQueue q = new LinkedTransferQueue();
591	<	q.add(one);
592	<	q.add(two);
593	<	ExecutorService executor = Executors.newFixedThreadPool(2);
594	<	executor.execute(new Runnable() {
595	<	public void run() {
596	<	try {
597	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
598	<	} catch (Throwable ex) {
599	<	threadUnexpectedException(ex);
600	<	}
601	<	}});
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	<	}});
591	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
592	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
593	>	try (PoolCleaner cleaner = cleaner(executor)) {
594	>
595	>	executor.execute(new CheckedRunnable() {
596	>	public void realRun() throws InterruptedException {
597	>	threadsStarted.await();
598	>	long startTime = System.nanoTime();
599	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
600	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
601	>	}});
602
603	<	joinPool(executor);
603	>	executor.execute(new CheckedRunnable() {
604	>	public void realRun() throws InterruptedException {
605	>	threadsStarted.await();
606	>	assertSame(one, q.take());
607	>	checkEmpty(q);
608	>	}});
609	>	}
610		}
611
612		/**
613	<	* poll retrieves elements across Executor threads
613	>	* timed poll retrieves elements across Executor threads
614		*/
615		public void testPollInExecutor() {
616		final LinkedTransferQueue q = new LinkedTransferQueue();
617	<	ExecutorService executor = Executors.newFixedThreadPool(2);
618	<	executor.execute(new Runnable() {
619	<	public void run() {
620	<	try {
621	<	threadAssertNull(q.poll());
622	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
623	<	threadAssertTrue(q.isEmpty());
624	<	} catch (Throwable  ex) {
625	<	threadUnexpectedException(ex);
626	<	}
627	<	}});
617	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
618	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
619	>	try (PoolCleaner cleaner = cleaner(executor)) {
620	>
621	>	executor.execute(new CheckedRunnable() {
622	>	public void realRun() throws InterruptedException {
623	>	assertNull(q.poll());
624	>	threadsStarted.await();
625	>	long startTime = System.nanoTime();
626	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
627	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
628	>	checkEmpty(q);
629	>	}});
630
631	<	executor.execute(new Runnable() {
632	<	public void run() {
633	<	try {
688	<	Thread.sleep(SMALL_DELAY_MS);
631	>	executor.execute(new CheckedRunnable() {
632	>	public void realRun() throws InterruptedException {
633	>	threadsStarted.await();
634		q.put(one);
635	<	} catch (Throwable ex) {
636	<	threadUnexpectedException(ex);
692	<	}
693	<	}});
694	<
695	<	joinPool(executor);
635	>	}});
636	>	}
637		}
638
639		/**
640		* A deserialized serialized queue has same elements in same order
641		*/
642		public void testSerialization() throws Exception {
643	<	LinkedTransferQueue q = populatedQueue(SIZE);
643	>	Queue x = populatedQueue(SIZE);
644	>	Queue y = serialClone(x);
645
646	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
647	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
648	<	out.writeObject(q);
649	<	out.close();
650	<
651	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
652	<	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());
716	<	}
717	<	}
718	<
719	<	/**
720	<	* drainTo(null) throws NullPointerException
721	<	*/
722	<	public void testDrainToNull() {
723	<	LinkedTransferQueue q = populatedQueue(SIZE);
724	<	try {
725	<	q.drainTo(null);
726	<	shouldThrow();
727	<	} catch (NullPointerException success) {
728	<	}
729	<	}
730	<
731	<	/**
732	<	* drainTo(this) throws IllegalArgumentException
733	<	*/
734	<	public void testDrainToSelf() {
735	<	LinkedTransferQueue q = populatedQueue(SIZE);
736	<	try {
737	<	q.drainTo(q);
738	<	shouldThrow();
739	<	} catch (IllegalArgumentException success) {
646	>	assertNotSame(y, x);
647	>	assertEquals(x.size(), y.size());
648	>	assertEquals(x.toString(), y.toString());
649	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
650	>	while (!x.isEmpty()) {
651	>	assertFalse(y.isEmpty());
652	>	assertEquals(x.remove(), y.remove());
653		}
654	+	assertTrue(y.isEmpty());
655		}
656
657		/**
#	Line 747 | Line 661 | public class LinkedTransferQueueTest ext
661		LinkedTransferQueue q = populatedQueue(SIZE);
662		ArrayList l = new ArrayList();
663		q.drainTo(l);
664	<	assertEquals(q.size(), 0);
665	<	assertEquals(l.size(), SIZE);
664	>	assertEquals(0, q.size());
665	>	assertEquals(SIZE, l.size());
666		for (int i = 0; i < SIZE; ++i) {
667	<	assertEquals(l.get(i), i);
667	>	assertEquals(i, l.get(i));
668		}
669		q.add(zero);
670		q.add(one);
#	Line 759 | Line 673 | public class LinkedTransferQueueTest ext
673		assertTrue(q.contains(one));
674		l.clear();
675		q.drainTo(l);
676	<	assertEquals(q.size(), 0);
677	<	assertEquals(l.size(), 2);
676	>	assertEquals(0, q.size());
677	>	assertEquals(2, l.size());
678		for (int i = 0; i < 2; ++i) {
679	<	assertEquals(l.get(i), i);
679	>	assertEquals(i, l.get(i));
680		}
681		}
682
683		/**
684	<	* drainTo empties full queue, unblocking a waiting put.
684	>	* drainTo(c) empties full queue, unblocking a waiting put.
685		*/
686		public void testDrainToWithActivePut() throws InterruptedException {
687		final LinkedTransferQueue q = populatedQueue(SIZE);
688	<	Thread t = new Thread(new Runnable() {
689	<	public void run() {
690	<	try {
777	<	q.put(SIZE + 1);
778	<	} catch (Throwable ex) {
779	<	threadUnexpectedException(ex);
780	<	}
688	>	Thread t = newStartedThread(new CheckedRunnable() {
689	>	public void realRun() {
690	>	q.put(SIZE + 1);
691		}});
782	–	t.start();
692		ArrayList l = new ArrayList();
693		q.drainTo(l);
694		assertTrue(l.size() >= SIZE);
695	<	for (int i = 0; i < SIZE; ++i) {
696	<	assertEquals(l.get(i), i);
697	<	}
789	<	t.join();
695	>	for (int i = 0; i < SIZE; ++i)
696	>	assertEquals(i, l.get(i));
697	>	awaitTermination(t);
698		assertTrue(q.size() + l.size() >= SIZE);
699		}
700
701		/**
702	<	* 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
702	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
703		*/
704		public void testDrainToN() {
705		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 826 | Line 710 | public class LinkedTransferQueueTest ext
710		ArrayList l = new ArrayList();
711		q.drainTo(l, i);
712		int k = (i < SIZE) ? i : SIZE;
713	<	assertEquals(l.size(), k);
714	<	assertEquals(q.size(), SIZE - k);
715	<	for (int j = 0; j < k; ++j) {
716	<	assertEquals(l.get(j), j);
717	<	}
834	<	while (q.poll() != null)
835	<	;
713	>	assertEquals(k, l.size());
714	>	assertEquals(SIZE - k, q.size());
715	>	for (int j = 0; j < k; ++j)
716	>	assertEquals(j, l.get(j));
717	>	do {} while (q.poll() != null);
718		}
719		}
720
721		/**
722	<	* poll and take decrement the waiting consumer count
722	>	* timed poll() or take() increments the waiting consumer count;
723	>	* offer(e) decrements the waiting consumer count
724		*/
725		public void testWaitingConsumer() throws InterruptedException {
726		final LinkedTransferQueue q = new LinkedTransferQueue();
727	<	final ConsumerObserver waiting = new ConsumerObserver();
728	<	new Thread(new Runnable() {
729	<	public void run() {
730	<	try {
731	<	threadAssertTrue(q.hasWaitingConsumer());
732	<	waiting.setWaitingConsumer(q.getWaitingConsumerCount());
733	<	threadAssertTrue(q.offer(new Object()));
734	<	} catch (Throwable ex) {
735	<	threadUnexpectedException(ex);
736	<	}
737	<	}}).start();
738	<	assertTrue(q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS) != null);
739	<	assertTrue(q.getWaitingConsumerCount() < waiting.getWaitingConsumers());
727	>	assertEquals(0, q.getWaitingConsumerCount());
728	>	assertFalse(q.hasWaitingConsumer());
729	>	final CountDownLatch threadStarted = new CountDownLatch(1);
730	>
731	>	Thread t = newStartedThread(new CheckedRunnable() {
732	>	public void realRun() throws InterruptedException {
733	>	threadStarted.countDown();
734	>	long startTime = System.nanoTime();
735	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
736	>	assertEquals(0, q.getWaitingConsumerCount());
737	>	assertFalse(q.hasWaitingConsumer());
738	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
739	>	}});
740	>
741	>	threadStarted.await();
742	>	waitForThreadToEnterWaitState(t);
743	>	assertEquals(1, q.getWaitingConsumerCount());
744	>	assertTrue(q.hasWaitingConsumer());
745	>
746	>	assertTrue(q.offer(one));
747	>	assertEquals(0, q.getWaitingConsumerCount());
748	>	assertFalse(q.hasWaitingConsumer());
749	>
750	>	awaitTermination(t);
751		}
752
753		/**
#	Line 864 | Line 758 | public class LinkedTransferQueueTest ext
758		LinkedTransferQueue q = new LinkedTransferQueue();
759		q.transfer(null);
760		shouldThrow();
761	<	} catch (NullPointerException ex) {
868	<	}
761	>	} catch (NullPointerException success) {}
762		}
763
764		/**
765		* transfer waits until a poll occurs. The transfered element
766	<	* is returned by this associated poll.
766	>	* is returned by the associated poll.
767		*/
768		public void testTransfer2() throws InterruptedException {
769	<	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
769	>	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
770	>	final CountDownLatch threadStarted = new CountDownLatch(1);
771
772	<	new Thread(new Runnable() {
773	<	public void run() {
774	<	try {
775	<	q.transfer(SIZE);
776	<	threadAssertTrue(q.isEmpty());
777	<	} catch (Throwable ex) {
884	<	threadUnexpectedException(ex);
885	<	}
886	<	}}).start();
772	>	Thread t = newStartedThread(new CheckedRunnable() {
773	>	public void realRun() throws InterruptedException {
774	>	threadStarted.countDown();
775	>	q.transfer(five);
776	>	checkEmpty(q);
777	>	}});
778
779	<	Thread.sleep(SHORT_DELAY_MS);
779	>	threadStarted.await();
780	>	waitForThreadToEnterWaitState(t);
781		assertEquals(1, q.size());
782	<	assertEquals(SIZE, (int) q.poll());
783	<	assertTrue(q.isEmpty());
782	>	assertSame(five, q.poll());
783	>	checkEmpty(q);
784	>	awaitTermination(t);
785		}
786
787		/**
788		* transfer waits until a poll occurs, and then transfers in fifo order
789		*/
790		public void testTransfer3() throws InterruptedException {
791	<	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
791	>	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
792
793	<	Thread first =
794	<	new Thread(new Runnable() {
795	<	public void run() {
796	<	try {
797	<	Integer i = SIZE + 1;
798	<	q.transfer(i);
906	<	threadAssertTrue(!q.contains(i));
907	<	threadAssertEquals(1, q.size());
908	<	} catch (Throwable ex) {
909	<	threadUnexpectedException(ex);
910	<	}
911	<	}});
912	<	first.start();
793	>	Thread first = newStartedThread(new CheckedRunnable() {
794	>	public void realRun() throws InterruptedException {
795	>	q.transfer(four);
796	>	assertTrue(!q.contains(four));
797	>	assertEquals(1, q.size());
798	>	}});
799
800	<	Thread interruptedThread =
801	<	new Thread(new Runnable() {
802	<	public void run() {
803	<	try {
804	<	while (q.size() == 0)
805	<	Thread.yield();
920	<	q.transfer(SIZE);
921	<	threadShouldThrow();
922	<	} catch (InterruptedException success) {
923	<	} catch (Throwable ex) {
924	<	threadUnexpectedException(ex);
925	<	}
800	>	Thread interruptedThread = newStartedThread(
801	>	new CheckedInterruptedRunnable() {
802	>	public void realRun() throws InterruptedException {
803	>	while (q.isEmpty())
804	>	Thread.yield();
805	>	q.transfer(five);
806		}});
927	–	interruptedThread.start();
807
808		while (q.size() < 2)
809		Thread.yield();
810		assertEquals(2, q.size());
811	<	assertEquals(SIZE + 1, (int) q.poll());
811	>	assertSame(four, q.poll());
812		first.join();
813		assertEquals(1, q.size());
814		interruptedThread.interrupt();
815		interruptedThread.join();
816	<	assertEquals(0, q.size());
938	<	assertTrue(q.isEmpty());
816	>	checkEmpty(q);
817		}
818
819		/**
#	Line 944 | Line 822 | public class LinkedTransferQueueTest ext
822		*/
823		public void testTransfer4() throws InterruptedException {
824		final LinkedTransferQueue q = new LinkedTransferQueue();
825	<	new Thread(new Runnable() {
826	<	public void run() {
827	<	try {
828	<	q.transfer(four);
829	<	threadAssertFalse(q.contains(four));
830	<	threadAssertEquals(three, q.poll());
831	<	} catch (Throwable ex) {
832	<	threadUnexpectedException(ex);
833	<	}
834	<	}}).start();
835	<	Thread.sleep(MEDIUM_DELAY_MS);
825	>
826	>	Thread t = newStartedThread(new CheckedRunnable() {
827	>	public void realRun() throws InterruptedException {
828	>	q.transfer(four);
829	>	assertFalse(q.contains(four));
830	>	assertSame(three, q.poll());
831	>	}});
832	>
833	>	while (q.isEmpty())
834	>	Thread.yield();
835	>	assertFalse(q.isEmpty());
836	>	assertEquals(1, q.size());
837		assertTrue(q.offer(three));
838	<	assertEquals(four, q.poll());
838	>	assertSame(four, q.poll());
839	>	awaitTermination(t);
840		}
841
842		/**
843		* transfer waits until a take occurs. The transfered element
844	<	* is returned by this associated take.
844	>	* is returned by the associated take.
845		*/
846		public void testTransfer5() throws InterruptedException {
847	<	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
847	>	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
848
849	<	new Thread(new Runnable() {
850	<	public void run() {
851	<	try {
852	<	q.transfer(SIZE);
853	<	threadAssertTrue(q.isEmpty());
974	<	} catch (Throwable ex) {
975	<	threadUnexpectedException(ex);
976	<	}
977	<	}}).start();
849	>	Thread t = newStartedThread(new CheckedRunnable() {
850	>	public void realRun() throws InterruptedException {
851	>	q.transfer(four);
852	>	checkEmpty(q);
853	>	}});
854
855	<	Thread.sleep(SHORT_DELAY_MS);
856	<	assertEquals(SIZE, (int) q.take());
857	<	assertTrue(q.isEmpty());
855	>	while (q.isEmpty())
856	>	Thread.yield();
857	>	assertFalse(q.isEmpty());
858	>	assertEquals(1, q.size());
859	>	assertSame(four, q.take());
860	>	checkEmpty(q);
861	>	awaitTermination(t);
862		}
863
864		/**
865		* tryTransfer(null) throws NullPointerException
866		*/
867		public void testTryTransfer1() {
868	+	final LinkedTransferQueue q = new LinkedTransferQueue();
869		try {
989	–	final LinkedTransferQueue q = new LinkedTransferQueue();
870		q.tryTransfer(null);
871	<	this.shouldThrow();
872	<	} catch (NullPointerException ex) {
993	<	}
871	>	shouldThrow();
872	>	} catch (NullPointerException success) {}
873		}
874
875		/**
876		* tryTransfer returns false and does not enqueue if there are no
877		* consumers waiting to poll or take.
878		*/
879	<	public void testTryTransfer2() {
879	>	public void testTryTransfer2() throws InterruptedException {
880		final LinkedTransferQueue q = new LinkedTransferQueue();
881		assertFalse(q.tryTransfer(new Object()));
882		assertFalse(q.hasWaitingConsumer());
883	<	assertTrue(q.isEmpty());
1005	<	assertEquals(0, q.size());
883	>	checkEmpty(q);
884		}
885
886		/**
#	Line 1012 | Line 890 | public class LinkedTransferQueueTest ext
890		public void testTryTransfer3() throws InterruptedException {
891		final Object hotPotato = new Object();
892		final LinkedTransferQueue q = new LinkedTransferQueue();
893	<	new Thread(new Runnable() {
894	<	public void run() {
895	<	try {
896	<	while (! q.hasWaitingConsumer())
897	<	Thread.yield();
898	<	threadAssertTrue(q.hasWaitingConsumer());
899	<	threadAssertTrue(q.isEmpty());
900	<	threadAssertTrue(q.size() == 0);
901	<	threadAssertTrue(q.tryTransfer(hotPotato));
902	<	} catch (Throwable ex) {
903	<	threadUnexpectedException(ex);
904	<	}
905	<	}}).start();
906	<	assertTrue(q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS) == hotPotato);
907	<	assertTrue(q.isEmpty());
893	>
894	>	Thread t = newStartedThread(new CheckedRunnable() {
895	>	public void realRun() {
896	>	while (! q.hasWaitingConsumer())
897	>	Thread.yield();
898	>	assertTrue(q.hasWaitingConsumer());
899	>	checkEmpty(q);
900	>	assertTrue(q.tryTransfer(hotPotato));
901	>	}});
902	>
903	>	long startTime = System.nanoTime();
904	>	assertSame(hotPotato, q.poll(LONG_DELAY_MS, MILLISECONDS));
905	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
906	>	checkEmpty(q);
907	>	awaitTermination(t);
908		}
909
910		/**
#	Line 1036 | Line 914 | public class LinkedTransferQueueTest ext
914		public void testTryTransfer4() throws InterruptedException {
915		final Object hotPotato = new Object();
916		final LinkedTransferQueue q = new LinkedTransferQueue();
917	<	new Thread(new Runnable() {
918	<	public void run() {
919	<	try {
920	<	while (! q.hasWaitingConsumer())
921	<	Thread.yield();
922	<	threadAssertTrue(q.hasWaitingConsumer());
923	<	threadAssertTrue(q.isEmpty());
924	<	threadAssertTrue(q.size() == 0);
925	<	threadAssertTrue(q.tryTransfer(hotPotato));
926	<	} catch (Throwable ex) {
927	<	threadUnexpectedException(ex);
928	<	}
929	<	}}).start();
1052	<	assertTrue(q.take() == hotPotato);
1053	<	assertTrue(q.isEmpty());
917	>
918	>	Thread t = newStartedThread(new CheckedRunnable() {
919	>	public void realRun() {
920	>	while (! q.hasWaitingConsumer())
921	>	Thread.yield();
922	>	assertTrue(q.hasWaitingConsumer());
923	>	checkEmpty(q);
924	>	assertTrue(q.tryTransfer(hotPotato));
925	>	}});
926	>
927	>	assertSame(q.take(), hotPotato);
928	>	checkEmpty(q);
929	>	awaitTermination(t);
930		}
931
932		/**
933	<	* tryTransfer waits the amount given if interrupted, and
1058	<	* throws interrupted exception
933	>	* tryTransfer blocks interruptibly if no takers
934		*/
935		public void testTryTransfer5() throws InterruptedException {
936		final LinkedTransferQueue q = new LinkedTransferQueue();
937	<	Thread toInterrupt = new Thread(new Runnable() {
938	<	public void run() {
937	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
938	>	assertTrue(q.isEmpty());
939	>
940	>	Thread t = newStartedThread(new CheckedRunnable() {
941	>	public void realRun() throws InterruptedException {
942	>	long startTime = System.nanoTime();
943	>	Thread.currentThread().interrupt();
944		try {
945	<	q.tryTransfer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
946	<	threadShouldThrow();
947	<	} catch (InterruptedException success) {
948	<	} catch (Throwable ex) {
949	<	threadUnexpectedException(ex);
950	<	}
945	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
946	>	shouldThrow();
947	>	} catch (InterruptedException success) {}
948	>	assertFalse(Thread.interrupted());
949	>
950	>	pleaseInterrupt.countDown();
951	>	try {
952	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
953	>	shouldThrow();
954	>	} catch (InterruptedException success) {}
955	>	assertFalse(Thread.interrupted());
956	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
957		}});
958	<	toInterrupt.start();
959	<	Thread.sleep(SMALL_DELAY_MS);
960	<	toInterrupt.interrupt();
958	>
959	>	await(pleaseInterrupt);
960	>	assertThreadStaysAlive(t);
961	>	t.interrupt();
962	>	awaitTermination(t);
963	>	checkEmpty(q);
964		}
965
966		/**
967	<	* tryTransfer gives up after the timeout and return false
967	>	* tryTransfer gives up after the timeout and returns false
968		*/
969		public void testTryTransfer6() throws InterruptedException {
970		final LinkedTransferQueue q = new LinkedTransferQueue();
971	<	new Thread(new Runnable() {
972	<	public void run() {
973	<	try {
974	<	threadAssertFalse(q.tryTransfer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
975	<	} catch (Throwable ex) {
976	<	threadUnexpectedException(ex);
977	<	}
978	<	}}).start();
979	<	Thread.sleep(LONG_DELAY_MS);
980	<	assertTrue(q.isEmpty());
971	>
972	>	Thread t = newStartedThread(new CheckedRunnable() {
973	>	public void realRun() throws InterruptedException {
974	>	long startTime = System.nanoTime();
975	>	assertFalse(q.tryTransfer(new Object(),
976	>	timeoutMillis(), MILLISECONDS));
977	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
978	>	checkEmpty(q);
979	>	}});
980	>
981	>	awaitTermination(t);
982	>	checkEmpty(q);
983		}
984
985		/**
#	Line 1098 | Line 989 | public class LinkedTransferQueueTest ext
989		public void testTryTransfer7() throws InterruptedException {
990		final LinkedTransferQueue q = new LinkedTransferQueue();
991		assertTrue(q.offer(four));
992	<	new Thread(new Runnable() {
993	<	public void run() {
994	<	try {
995	<	threadAssertTrue(q.tryTransfer(five, LONG_DELAY_MS, TimeUnit.MILLISECONDS));
996	<	threadAssertTrue(q.isEmpty());
997	<	} catch (Throwable ex) {
998	<	threadUnexpectedException(ex);
999	<	}
1000	<	}}).start();
1001	<	Thread.sleep(SHORT_DELAY_MS);
992	>
993	>	Thread t = newStartedThread(new CheckedRunnable() {
994	>	public void realRun() throws InterruptedException {
995	>	long startTime = System.nanoTime();
996	>	assertTrue(q.tryTransfer(five, LONG_DELAY_MS, MILLISECONDS));
997	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
998	>	checkEmpty(q);
999	>	}});
1000	>
1001	>	while (q.size() != 2)
1002	>	Thread.yield();
1003		assertEquals(2, q.size());
1004	<	assertEquals(four, q.poll());
1005	<	assertEquals(five, q.poll());
1006	<	assertTrue(q.isEmpty());
1004	>	assertSame(four, q.poll());
1005	>	assertSame(five, q.poll());
1006	>	checkEmpty(q);
1007	>	awaitTermination(t);
1008		}
1009
1010		/**
1011	<	* tryTransfer attempts to enqueue into the q and fails returning
1012	<	* false not enqueueing and the successive poll is null
1011	>	* tryTransfer attempts to enqueue into the queue and fails
1012	>	* returning false not enqueueing and the successive poll is null
1013		*/
1014		public void testTryTransfer8() throws InterruptedException {
1015		final LinkedTransferQueue q = new LinkedTransferQueue();
1016		assertTrue(q.offer(four));
1017		assertEquals(1, q.size());
1018	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
1018	>	long startTime = System.nanoTime();
1019	>	assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
1020	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
1021		assertEquals(1, q.size());
1022	<	assertEquals(four, q.poll());
1128	<	threadAssertTrue(q.isEmpty());
1022	>	assertSame(four, q.poll());
1023		assertNull(q.poll());
1024	+	checkEmpty(q);
1025		}
1026
1027		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1028	<	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1029	<	assertTrue(q.isEmpty());
1028	>	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<>();
1029	>	checkEmpty(q);
1030		for (int i = 0; i < n; i++) {
1031		assertEquals(i, q.size());
1032		assertTrue(q.offer(i));
#	Line 1141 | Line 1036 | public class LinkedTransferQueueTest ext
1036		return q;
1037		}
1038
1039	<	private static class ConsumerObserver {
1040	<
1041	<	private int waitingConsumers;
1042	<
1043	<	private ConsumerObserver() {
1044	<	}
1045	<
1046	<	private void setWaitingConsumer(int i) {
1047	<	this.waitingConsumers = i;
1048	<	}
1049	<
1050	<	private int getWaitingConsumers() {
1156	<	return waitingConsumers;
1039	>	/**
1040	>	* remove(null), contains(null) always return false
1041	>	*/
1042	>	public void testNeverContainsNull() {
1043	>	Collection<?>[] qs = {
1044	>	new LinkedTransferQueue<Object>(),
1045	>	populatedQueue(2),
1046	>	};
1047	>
1048	>	for (Collection<?> q : qs) {
1049	>	assertFalse(q.contains(null));
1050	>	assertFalse(q.remove(null));
1051		}
1052		}
1053		}

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