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

Comparing jsr166/src/test/tck/LinkedTransferQueueTest.java (file contents):
Revision 1.4 by jsr166, Sat Aug 1 22:09:13 2009 UTC vs.
Revision 1.63 by jsr166, Sun Oct 4 18:49:02 2015 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include John Vint
6		*/
7
8	<	import java.io.BufferedInputStream;
9	<	import java.io.BufferedOutputStream;
10	<	import java.io.ByteArrayInputStream;
11	<	import java.io.ByteArrayOutputStream;
12	<	import java.io.ObjectInputStream;
13	<	import java.io.ObjectOutputStream;
8	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
9	>
10		import java.util.ArrayList;
11		import java.util.Arrays;
12	<	import java.util.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	+	static class Implementation implements CollectionImplementation {
28	+	public Class<?> klazz() { return LinkedTransferQueue.class; }
29	+	public Collection emptyCollection() { return new LinkedTransferQueue(); }
30	+	public Object makeElement(int i) { return i; }
31	+	public boolean isConcurrent() { return true; }
32	+	public boolean permitsNulls() { return false; }
33	+	}
34	+
35	+	public static class Generic extends BlockingQueueTest {
36	+	protected BlockingQueue emptyCollection() {
37	+	return new LinkedTransferQueue();
38	+	}
39	+	}
40
41		public static void main(String[] args) {
42	<	junit.textui.TestRunner.run(suite());
42	>	main(suite(), args);
43		}
44
45		public static Test suite() {
46	<	return new TestSuite(LinkedTransferQueueTest.class);
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 NPE
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 NPE
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		/**
84		* Initializing constructor with a collection containing some null elements
85	<	* throws NPE
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] = new Integer(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] = new Integer(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 q = populatedQueue(SIZE);
102	<	int remainingCapacity = q.remainingCapacity();
126	>	BlockingQueue q = populatedQueue(SIZE);
127		for (int i = 0; i < SIZE; ++i) {
128	<	assertEquals(remainingCapacity, q.remainingCapacity());
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(remainingCapacity, q.remainingCapacity());
133	>	assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
134		assertEquals(i, q.size());
135	<	q.add(new Integer(i));
135	>	assertTrue(q.add(i));
136		}
137		}
138
139		/**
140	<	* offer(null) throws NPE
117	<	*/
118	<	public void testOfferNull() {
119	<	try {
120	<	LinkedTransferQueue q = new LinkedTransferQueue();
121	<	q.offer(null);
122	<	shouldThrow();
123	<	} catch (NullPointerException success) {
124	<	}
125	<	}
126	<
127	<	/**
128	<	* add(null) throws NPE
129	<	*/
130	<	public void testAddNull() {
131	<	try {
132	<	LinkedTransferQueue q = new LinkedTransferQueue();
133	<	q.add(null);
134	<	shouldThrow();
135	<	} catch (NullPointerException success) {
136	<	}
137	<	}
138	<
139	<	/**
140	<	* addAll(null) throws NPE
141	<	*/
142	<	public void testAddAll1() {
143	<	try {
144	<	LinkedTransferQueue q = new LinkedTransferQueue();
145	<	q.addAll(null);
146	<	shouldThrow();
147	<	} catch (NullPointerException success) {
148	<	}
149	<	}
150	<
151	<	/**
152	<	* addAll(this) throws IAE
140	>	* addAll(this) throws IllegalArgumentException
141		*/
142		public void testAddAllSelf() {
143	+	LinkedTransferQueue q = populatedQueue(SIZE);
144		try {
156	–	LinkedTransferQueue q = populatedQueue(SIZE);
145		q.addAll(q);
146		shouldThrow();
147	<	} catch (IllegalArgumentException success) {
160	<	}
147	>	} catch (IllegalArgumentException success) {}
148		}
149
150		/**
151	<	* addAll of a collection with null elements throws NPE
152	<	*/
166	<	public void testAddAll2() {
167	<	try {
168	<	LinkedTransferQueue q = new LinkedTransferQueue();
169	<	Integer[] ints = new Integer[SIZE];
170	<	q.addAll(Arrays.asList(ints));
171	<	shouldThrow();
172	<	} catch (NullPointerException success) {
173	<	}
174	<	}
175	<
176	<	/**
177	<	* addAll of a collection with any null elements throws NPE after
178	<	* 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 {
182	–	LinkedTransferQueue q = new LinkedTransferQueue();
183	–	Integer[] ints = new Integer[SIZE];
184	–	for (int i = 0; i < SIZE - 1; ++i) {
185	–	ints[i] = new Integer(i);
186	–	}
160		q.addAll(Arrays.asList(ints));
161		shouldThrow();
162	<	} catch (NullPointerException success) {
190	<	}
162	>	} catch (NullPointerException success) {}
163		}
164
165		/**
166		* Queue contains all elements, in traversal order, of successful addAll
167		*/
168		public void testAddAll5() {
169	<	try {
170	<	Integer[] empty = new Integer[0];
171	<	Integer[] ints = new Integer[SIZE];
172	<	for (int i = 0; i < SIZE; ++i) {
201	<	ints[i] = new Integer(i);
202	<	}
203	<	LinkedTransferQueue q = new LinkedTransferQueue();
204	<	assertFalse(q.addAll(Arrays.asList(empty)));
205	<	assertTrue(q.addAll(Arrays.asList(ints)));
206	<	for (int i = 0; i < SIZE; ++i) {
207	<	assertEquals(ints[i], q.poll());
208	<	}
209	<	} finally {
169	>	Integer[] empty = new Integer[0];
170	>	Integer[] ints = new Integer[SIZE];
171	>	for (int i = 0; i < SIZE; ++i) {
172	>	ints[i] = i;
173		}
174	<	}
175	<
176	<	/**
177	<	* put(null) throws NPE
178	<	*/
216	<	public void testPutNull() {
217	<	try {
218	<	LinkedTransferQueue q = new LinkedTransferQueue();
219	<	q.put(null);
220	<	shouldThrow();
221	<	} catch (NullPointerException success) {
222	<	} catch (Exception ie) {
223	<	unexpectedException();
174	>	LinkedTransferQueue q = new LinkedTransferQueue();
175	>	assertFalse(q.addAll(Arrays.asList(empty)));
176	>	assertTrue(q.addAll(Arrays.asList(ints)));
177	>	for (int i = 0; i < SIZE; ++i) {
178	>	assertEquals(ints[i], q.poll());
179		}
180		}
181
#	Line 228 | Line 183 | public class LinkedTransferQueueTest ext
183		* all elements successfully put are contained
184		*/
185		public void testPut() {
186	<	try {
187	<	LinkedTransferQueue q = new LinkedTransferQueue();
188	<	for (int i = 0; i < SIZE; ++i) {
189	<	Integer I = new Integer(i);
190	<	q.put(I);
236	<	assertTrue(q.contains(I));
237	<	}
238	<	} catch (Exception ie) {
239	<	unexpectedException();
186	>	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
187	>	for (int i = 0; i < SIZE; ++i) {
188	>	assertEquals(i, q.size());
189	>	q.put(i);
190	>	assertTrue(q.contains(i));
191		}
192		}
193
194		/**
195		* take retrieves elements in FIFO order
196		*/
197	<	public void testTake() {
198	<	try {
199	<	LinkedTransferQueue q = populatedQueue(SIZE);
200	<	for (int i = 0; i < SIZE; ++i) {
250	<	assertEquals(i, ((Integer) q.take()).intValue());
251	<	}
252	<	} catch (InterruptedException e) {
253	<	unexpectedException();
197	>	public void testTake() throws InterruptedException {
198	>	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
199	>	for (int i = 0; i < SIZE; ++i) {
200	>	assertEquals(i, (int) q.take());
201		}
202		}
203
204		/**
205	<	* take blocks interruptibly when empty
205	>	* take removes existing elements until empty, then blocks interruptibly
206		*/
207	<	public void testTakeFromEmpty() {
208	<	final LinkedTransferQueue q = new LinkedTransferQueue();
209	<	Thread t = new Thread(new Runnable() {
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) {
213	>	assertEquals(i, q.take());
214	>	}
215
216	<	public void run() {
216	>	Thread.currentThread().interrupt();
217		try {
218		q.take();
219	<	threadShouldThrow();
220	<	} catch (InterruptedException success) {
221	<	}
270	<	}
271	<	});
272	<	try {
273	<	t.start();
274	<	Thread.sleep(SHORT_DELAY_MS);
275	<	t.interrupt();
276	<	t.join();
277	<	} catch (Exception e) {
278	<	unexpectedException();
279	<	}
280	<	}
281	<
282	<	/**
283	<	* Take removes existing elements until empty, then blocks interruptibly
284	<	*/
285	<	public void testBlockingTake() {
286	<	Thread t = new Thread(new Runnable() {
219	>	shouldThrow();
220	>	} catch (InterruptedException success) {}
221	>	assertFalse(Thread.interrupted());
222
223	<	public void run() {
223	>	pleaseInterrupt.countDown();
224		try {
290	–	LinkedTransferQueue q = populatedQueue(SIZE);
291	–	for (int i = 0; i < SIZE; ++i) {
292	–	assertEquals(i, ((Integer) q.take()).intValue());
293	–	}
225		q.take();
226	<	threadShouldThrow();
227	<	} catch (InterruptedException success) {
228	<	}
229	<	}
230	<	});
231	<	t.start();
232	<	try {
233	<	Thread.sleep(SHORT_DELAY_MS);
234	<	t.interrupt();
304	<	t.join();
305	<	} catch (InterruptedException ie) {
306	<	unexpectedException();
307	<	}
226	>	shouldThrow();
227	>	} catch (InterruptedException success) {}
228	>	assertFalse(Thread.interrupted());
229	>	}});
230	>
231	>	await(pleaseInterrupt);
232	>	assertThreadStaysAlive(t);
233	>	t.interrupt();
234	>	awaitTermination(t);
235		}
236
237		/**
238		* poll succeeds unless empty
239		*/
240	<	public void testPoll() {
241	<	LinkedTransferQueue q = populatedQueue(SIZE);
240	>	public void testPoll() throws InterruptedException {
241	>	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
242		for (int i = 0; i < SIZE; ++i) {
243	<	assertEquals(i, ((Integer) q.poll()).intValue());
243	>	assertEquals(i, (int) q.poll());
244		}
245		assertNull(q.poll());
246	+	checkEmpty(q);
247		}
248
249		/**
250	<	* timed pool with zero timeout succeeds when non-empty, else times out
250	>	* timed poll with zero timeout succeeds when non-empty, else times out
251		*/
252	<	public void testTimedPoll0() {
253	<	try {
254	<	LinkedTransferQueue q = populatedQueue(SIZE);
255	<	for (int i = 0; i < SIZE; ++i) {
328	<	assertEquals(i, ((Integer) q.poll(0, TimeUnit.MILLISECONDS)).intValue());
329	<	}
330	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
331	<	} catch (InterruptedException e) {
332	<	unexpectedException();
252	>	public void testTimedPoll0() throws InterruptedException {
253	>	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
254	>	for (int i = 0; i < SIZE; ++i) {
255	>	assertEquals(i, (int) q.poll(0, MILLISECONDS));
256		}
257	+	assertNull(q.poll(0, MILLISECONDS));
258	+	checkEmpty(q);
259		}
260
261		/**
262	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
262	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
263		*/
264	<	public void testTimedPoll() {
265	<	try {
266	<	LinkedTransferQueue q = populatedQueue(SIZE);
267	<	for (int i = 0; i < SIZE; ++i) {
268	<	assertEquals(i, ((Integer) q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
269	<	}
270	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
271	<	} catch (InterruptedException e) {
272	<	unexpectedException();
273	<	}
264	>	public void testTimedPoll() throws InterruptedException {
265	>	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
266	>	for (int i = 0; i < SIZE; ++i) {
267	>	long startTime = System.nanoTime();
268	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
269	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
270	>	}
271	>	long startTime = System.nanoTime();
272	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
273	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
274	>	checkEmpty(q);
275		}
276
277		/**
278		* Interrupted timed poll throws InterruptedException instead of
279		* returning timeout status
280		*/
281	<	public void testInterruptedTimedPoll() {
282	<	Thread t = new Thread(new Runnable() {
283	<
284	<	public void run() {
281	>	public void testInterruptedTimedPoll() throws InterruptedException {
282	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
283	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
284	>	Thread t = newStartedThread(new CheckedRunnable() {
285	>	public void realRun() throws InterruptedException {
286	>	for (int i = 0; i < SIZE; ++i) {
287	>	long t0 = System.nanoTime();
288	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
289	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
290	>	}
291	>	long t0 = System.nanoTime();
292	>	aboutToWait.countDown();
293		try {
294	<	LinkedTransferQueue q = populatedQueue(SIZE);
295	<	for (int i = 0; i < SIZE; ++i) {
362	<	threadAssertEquals(i, ((Integer) q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
363	<	}
364	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
294	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
295	>	shouldThrow();
296		} catch (InterruptedException success) {
297	+	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
298		}
299	<	}
300	<	});
301	<	t.start();
302	<	try {
303	<	Thread.sleep(SHORT_DELAY_MS);
304	<	t.interrupt();
305	<	t.join();
374	<	} catch (InterruptedException ie) {
375	<	unexpectedException();
376	<	}
299	>	}});
300	>
301	>	aboutToWait.await();
302	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
303	>	t.interrupt();
304	>	awaitTermination(t, MEDIUM_DELAY_MS);
305	>	checkEmpty(q);
306		}
307
308		/**
309	<	* timed poll before a delayed offer fails; after offer succeeds;
310	<	* on interruption throws
311	<	*/
312	<	public void testTimedPollWithOffer() {
313	<	final LinkedTransferQueue q = new LinkedTransferQueue();
314	<	Thread t = new Thread(new Runnable() {
315	<
316	<	public void run() {
317	<	try {
318	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
319	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
320	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
392	<	threadShouldThrow();
393	<	} catch (InterruptedException success) {
309	>	* timed poll after thread interrupted throws InterruptedException
310	>	* instead of returning timeout status
311	>	*/
312	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
313	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
314	>	Thread t = newStartedThread(new CheckedRunnable() {
315	>	public void realRun() throws InterruptedException {
316	>	Thread.currentThread().interrupt();
317	>	for (int i = 0; i < SIZE; ++i) {
318	>	long t0 = System.nanoTime();
319	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
320	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
321		}
322	<	}
323	<	});
324	<	try {
325	<	t.start();
326	<	Thread.sleep(SMALL_DELAY_MS);
327	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
328	<	t.interrupt();
329	<	t.join();
403	<	} catch (Exception e) {
404	<	unexpectedException();
405	<	}
322	>	try {
323	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
324	>	shouldThrow();
325	>	} catch (InterruptedException success) {}
326	>	}});
327	>
328	>	awaitTermination(t, MEDIUM_DELAY_MS);
329	>	checkEmpty(q);
330		}
331
332		/**
333		* peek returns next element, or null if empty
334		*/
335	<	public void testPeek() {
336	<	LinkedTransferQueue q = populatedQueue(SIZE);
335	>	public void testPeek() throws InterruptedException {
336	>	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
337		for (int i = 0; i < SIZE; ++i) {
338	<	assertEquals(i, ((Integer) q.peek()).intValue());
339	<	q.poll();
338	>	assertEquals(i, (int) q.peek());
339	>	assertEquals(i, (int) q.poll());
340		assertTrue(q.peek() == null ||
341	<	i != ((Integer) q.peek()).intValue());
341	>	i != (int) q.peek());
342		}
343		assertNull(q.peek());
344	+	checkEmpty(q);
345		}
346
347		/**
348	<	* element returns next element, or throws NSEE if empty
348	>	* element returns next element, or throws NoSuchElementException if empty
349		*/
350	<	public void testElement() {
351	<	LinkedTransferQueue q = populatedQueue(SIZE);
350	>	public void testElement() throws InterruptedException {
351	>	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
352		for (int i = 0; i < SIZE; ++i) {
353	<	assertEquals(i, ((Integer) q.element()).intValue());
354	<	q.poll();
353	>	assertEquals(i, (int) q.element());
354	>	assertEquals(i, (int) q.poll());
355		}
356		try {
357		q.element();
358		shouldThrow();
359	<	} catch (NoSuchElementException success) {
360	<	}
359	>	} catch (NoSuchElementException success) {}
360	>	checkEmpty(q);
361		}
362
363		/**
364	<	* remove removes next element, or throws NSEE if empty
364	>	* remove removes next element, or throws NoSuchElementException if empty
365		*/
366	<	public void testRemove() {
367	<	LinkedTransferQueue q = populatedQueue(SIZE);
366	>	public void testRemove() throws InterruptedException {
367	>	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
368		for (int i = 0; i < SIZE; ++i) {
369	<	assertEquals(i, ((Integer) q.remove()).intValue());
369	>	assertEquals(i, (int) q.remove());
370		}
371		try {
372		q.remove();
373		shouldThrow();
374	<	} catch (NoSuchElementException success) {
375	<	}
451	<	}
452	<
453	<	/**
454	<	* remove(x) removes x and returns true if present
455	<	*/
456	<	public void testRemoveElement() {
457	<	LinkedTransferQueue q = populatedQueue(SIZE);
458	<	for (int i = 1; i < SIZE; i += 2) {
459	<	assertTrue(q.remove(new Integer(i)));
460	<	}
461	<	for (int i = 0; i < SIZE; i += 2) {
462	<	assertTrue(q.remove(new Integer(i)));
463	<	assertFalse(q.remove(new Integer(i + 1)));
464	<	}
465	<	assertTrue(q.isEmpty());
374	>	} catch (NoSuchElementException success) {}
375	>	checkEmpty(q);
376		}
377
378		/**
379		* An add following remove(x) succeeds
380		*/
381	<	public void testRemoveElementAndAdd() {
382	<	try {
383	<	LinkedTransferQueue q = new LinkedTransferQueue();
384	<	assertTrue(q.add(new Integer(1)));
385	<	assertTrue(q.add(new Integer(2)));
386	<	assertTrue(q.remove(new Integer(1)));
387	<	assertTrue(q.remove(new Integer(2)));
388	<	assertTrue(q.add(new Integer(3)));
479	<	assertTrue(q.take() != null);
480	<	} catch (Exception e) {
481	<	unexpectedException();
482	<	}
381	>	public void testRemoveElementAndAdd() throws InterruptedException {
382	>	LinkedTransferQueue q = new LinkedTransferQueue();
383	>	assertTrue(q.add(one));
384	>	assertTrue(q.add(two));
385	>	assertTrue(q.remove(one));
386	>	assertTrue(q.remove(two));
387	>	assertTrue(q.add(three));
388	>	assertSame(q.take(), three);
389		}
390
391		/**
392		* contains(x) reports true when elements added but not yet removed
393		*/
394		public void testContains() {
395	<	LinkedTransferQueue q = populatedQueue(SIZE);
395	>	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
396		for (int i = 0; i < SIZE; ++i) {
397	<	assertTrue(q.contains(new Integer(i)));
398	<	q.poll();
399	<	assertFalse(q.contains(new Integer(i)));
397	>	assertTrue(q.contains(i));
398	>	assertEquals(i, (int) q.poll());
399	>	assertFalse(q.contains(i));
400		}
401		}
402
403		/**
404		* clear removes all elements
405		*/
406	<	public void testClear() {
406	>	public void testClear() throws InterruptedException {
407		LinkedTransferQueue q = populatedQueue(SIZE);
502	–	int remainingCapacity = q.remainingCapacity();
408		q.clear();
409	<	assertTrue(q.isEmpty());
410	<	assertEquals(0, q.size());
506	<	assertEquals(remainingCapacity, q.remainingCapacity());
409	>	checkEmpty(q);
410	>	assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
411		q.add(one);
412		assertFalse(q.isEmpty());
413	+	assertEquals(1, q.size());
414		assertTrue(q.contains(one));
415		q.clear();
416	<	assertTrue(q.isEmpty());
416	>	checkEmpty(q);
417		}
418
419		/**
420		* containsAll(c) is true when c contains a subset of elements
421		*/
422		public void testContainsAll() {
423	<	LinkedTransferQueue q = populatedQueue(SIZE);
424	<	LinkedTransferQueue p = new LinkedTransferQueue();
423	>	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
424	>	LinkedTransferQueue<Integer> p = new LinkedTransferQueue<Integer>();
425		for (int i = 0; i < SIZE; ++i) {
426		assertTrue(q.containsAll(p));
427		assertFalse(p.containsAll(q));
428	<	p.add(new Integer(i));
428	>	p.add(i);
429		}
430		assertTrue(p.containsAll(q));
431		}
432
433		/**
434	<	* retainAll(c) retains only those elements of c and reports true if changed
434	>	* retainAll(c) retains only those elements of c and reports true
435	>	* if changed
436		*/
437		public void testRetainAll() {
438		LinkedTransferQueue q = populatedQueue(SIZE);
#	Line 545 | Line 451 | public class LinkedTransferQueueTest ext
451		}
452
453		/**
454	<	* removeAll(c) removes only those elements of c and reports true if changed
454	>	* removeAll(c) removes only those elements of c and reports true
455	>	* if changed
456		*/
457		public void testRemoveAll() {
458		for (int i = 1; i < SIZE; ++i) {
#	Line 554 | Line 461 | public class LinkedTransferQueueTest ext
461		assertTrue(q.removeAll(p));
462		assertEquals(SIZE - i, q.size());
463		for (int j = 0; j < i; ++j) {
464	<	Integer I = (Integer) (p.remove());
558	<	assertFalse(q.contains(I));
464	>	assertFalse(q.contains(p.remove()));
465		}
466		}
467		}
468
469		/**
470	<	* toArray contains all elements
470	>	* toArray() contains all elements in FIFO order
471		*/
472		public void testToArray() {
473		LinkedTransferQueue q = populatedQueue(SIZE);
474		Object[] o = q.toArray();
475	<	try {
476	<	for (int i = 0; i < o.length; i++) {
571	<	assertEquals(o[i], q.take());
572	<	}
573	<	} catch (InterruptedException e) {
574	<	unexpectedException();
475	>	for (int i = 0; i < o.length; i++) {
476	>	assertSame(o[i], q.poll());
477		}
478		}
479
480		/**
481	<	* toArray(a) contains all elements
481	>	* toArray(a) contains all elements in FIFO order
482		*/
483		public void testToArray2() {
484	<	LinkedTransferQueue q = populatedQueue(SIZE);
484	>	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
485		Integer[] ints = new Integer[SIZE];
486	<	ints = (Integer[]) q.toArray(ints);
487	<	try {
488	<	for (int i = 0; i < ints.length; i++) {
489	<	assertEquals(ints[i], q.take());
588	<	}
589	<	} catch (InterruptedException e) {
590	<	unexpectedException();
486	>	Integer[] array = q.toArray(ints);
487	>	assertSame(ints, array);
488	>	for (int i = 0; i < ints.length; i++) {
489	>	assertSame(ints[i], q.poll());
490		}
491		}
492
493		/**
494	<	* toArray(null) throws NPE
596	<	*/
597	<	public void testToArray_BadArg() {
598	<	try {
599	<	LinkedTransferQueue q = populatedQueue(SIZE);
600	<	Object o[] = q.toArray(null);
601	<	shouldThrow();
602	<	} catch (NullPointerException success) {
603	<	}
604	<	}
605	<
606	<	/**
607	<	* toArray with incompatible array type throws CCE
494	>	* toArray(incompatible array type) throws ArrayStoreException
495		*/
496		public void testToArray1_BadArg() {
497	+	LinkedTransferQueue q = populatedQueue(SIZE);
498		try {
499	<	LinkedTransferQueue q = populatedQueue(SIZE);
612	<	Object o[] = q.toArray(new String[10]);
499	>	q.toArray(new String[10]);
500		shouldThrow();
501	<	} catch (ArrayStoreException success) {
615	<	}
501	>	} catch (ArrayStoreException success) {}
502		}
503
504		/**
505		* iterator iterates through all elements
506		*/
507	<	public void testIterator() {
507	>	public void testIterator() throws InterruptedException {
508		LinkedTransferQueue q = populatedQueue(SIZE);
509		Iterator it = q.iterator();
510	<	try {
511	<	while (it.hasNext()) {
512	<	assertEquals(it.next(), q.take());
513	<	}
514	<	} catch (InterruptedException e) {
515	<	unexpectedException();
516	<	}
510	>	int i;
511	>	for (i = 0; it.hasNext(); i++)
512	>	assertTrue(q.contains(it.next()));
513	>	assertEquals(i, SIZE);
514	>	assertIteratorExhausted(it);
515	>
516	>	it = q.iterator();
517	>	for (i = 0; it.hasNext(); i++)
518	>	assertEquals(it.next(), q.take());
519	>	assertEquals(i, SIZE);
520	>	assertIteratorExhausted(it);
521	>	}
522	>
523	>	/**
524	>	* iterator of empty collection has no elements
525	>	*/
526	>	public void testEmptyIterator() {
527	>	assertIteratorExhausted(new LinkedTransferQueue().iterator());
528		}
529
530		/**
531	<	* iterator.remove removes current element
531	>	* iterator.remove() removes current element
532		*/
533		public void testIteratorRemove() {
534		final LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 644 | Line 541 | public class LinkedTransferQueueTest ext
541		it.remove();
542
543		it = q.iterator();
544	<	assertEquals(it.next(), one);
545	<	assertEquals(it.next(), three);
544	>	assertSame(it.next(), one);
545	>	assertSame(it.next(), three);
546		assertFalse(it.hasNext());
547		}
548
#	Line 653 | Line 550 | public class LinkedTransferQueueTest ext
550		* iterator ordering is FIFO
551		*/
552		public void testIteratorOrdering() {
553	<	final LinkedTransferQueue q = new LinkedTransferQueue();
554	<	int remainingCapacity = q.remainingCapacity();
553	>	final LinkedTransferQueue<Integer> q
554	>	= new LinkedTransferQueue<Integer>();
555	>	assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
556		q.add(one);
557		q.add(two);
558		q.add(three);
559	<	assertEquals(remainingCapacity, q.remainingCapacity());
559	>	assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
560		int k = 0;
561	<	for (Iterator it = q.iterator(); it.hasNext();) {
562	<	int i = ((Integer) (it.next())).intValue();
665	<	assertEquals(++k, i);
561	>	for (Integer n : q) {
562	>	assertEquals(++k, (int) n);
563		}
564		assertEquals(3, k);
565		}
#	Line 675 | Line 572 | public class LinkedTransferQueueTest ext
572		q.add(one);
573		q.add(two);
574		q.add(three);
575	<	try {
576	<	for (Iterator it = q.iterator(); it.hasNext();) {
577	<	q.remove();
681	<	it.next();
682	<	}
683	<	} catch (ConcurrentModificationException e) {
684	<	unexpectedException();
575	>	for (Iterator it = q.iterator(); it.hasNext();) {
576	>	q.remove();
577	>	it.next();
578		}
579		assertEquals(0, q.size());
580		}
#	Line 693 | Line 586 | public class LinkedTransferQueueTest ext
586		LinkedTransferQueue q = populatedQueue(SIZE);
587		String s = q.toString();
588		for (int i = 0; i < SIZE; ++i) {
589	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
589	>	assertTrue(s.contains(String.valueOf(i)));
590		}
591		}
592
#	Line 702 | Line 595 | public class LinkedTransferQueueTest ext
595		*/
596		public void testOfferInExecutor() {
597		final LinkedTransferQueue q = new LinkedTransferQueue();
598	<	q.add(one);
599	<	q.add(two);
600	<	ExecutorService executor = Executors.newFixedThreadPool(2);
708	<	executor.execute(new Runnable() {
709	<
710	<	public void run() {
711	<	try {
712	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
713	<	} catch (Exception e) {
714	<	threadUnexpectedException();
715	<	}
716	<	}
717	<	});
598	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
599	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
600	>	try (PoolCleaner cleaner = cleaner(executor)) {
601
602	<	executor.execute(new Runnable() {
602	>	executor.execute(new CheckedRunnable() {
603	>	public void realRun() throws InterruptedException {
604	>	threadsStarted.await();
605	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
606	>	}});
607
608	<	public void run() {
609	<	try {
610	<	Thread.sleep(SMALL_DELAY_MS);
611	<	threadAssertEquals(one, q.take());
612	<	} catch (InterruptedException e) {
613	<	threadUnexpectedException();
614	<	}
728	<	}
729	<	});
730	<
731	<	joinPool(executor);
608	>	executor.execute(new CheckedRunnable() {
609	>	public void realRun() throws InterruptedException {
610	>	threadsStarted.await();
611	>	assertSame(one, q.take());
612	>	checkEmpty(q);
613	>	}});
614	>	}
615		}
616
617		/**
618	<	* poll retrieves elements across Executor threads
618	>	* timed poll retrieves elements across Executor threads
619		*/
620		public void testPollInExecutor() {
621		final LinkedTransferQueue q = new LinkedTransferQueue();
622	<	ExecutorService executor = Executors.newFixedThreadPool(2);
623	<	executor.execute(new Runnable() {
624	<
625	<	public void run() {
626	<	threadAssertNull(q.poll());
627	<	try {
628	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
629	<	threadAssertTrue(q.isEmpty());
630	<	} catch (InterruptedException e) {
631	<	threadUnexpectedException();
632	<	}
633	<	}
634	<	});
635	<
636	<	executor.execute(new Runnable() {
754	<
755	<	public void run() {
756	<	try {
757	<	Thread.sleep(SMALL_DELAY_MS);
622	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
623	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
624	>	try (PoolCleaner cleaner = cleaner(executor)) {
625	>
626	>	executor.execute(new CheckedRunnable() {
627	>	public void realRun() throws InterruptedException {
628	>	assertNull(q.poll());
629	>	threadsStarted.await();
630	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
631	>	checkEmpty(q);
632	>	}});
633	>
634	>	executor.execute(new CheckedRunnable() {
635	>	public void realRun() throws InterruptedException {
636	>	threadsStarted.await();
637		q.put(one);
638	<	} catch (InterruptedException e) {
760	<	threadUnexpectedException();
761	<	}
762	<	}
763	<	});
764	<
765	<	joinPool(executor);
766	<	}
767	<
768	<	/**
769	<	* A deserialized serialized queue has same elements in same order
770	<	*/
771	<	public void testSerialization() {
772	<	LinkedTransferQueue q = populatedQueue(SIZE);
773	<
774	<	try {
775	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
776	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
777	<	out.writeObject(q);
778	<	out.close();
779	<
780	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
781	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
782	<	LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
783	<
784	<	assertEquals(q.size(), r.size());
785	<	while (!q.isEmpty()) {
786	<	assertEquals(q.remove(), r.remove());
787	<	}
788	<	} catch (Exception e) {
789	<	unexpectedException();
638	>	}});
639		}
640		}
641
642		/**
643	<	* drainTo(null) throws NPE
795	<	*/
796	<	public void testDrainToNull() {
797	<	LinkedTransferQueue q = populatedQueue(SIZE);
798	<	try {
799	<	q.drainTo(null);
800	<	shouldThrow();
801	<	} catch (NullPointerException success) {
802	<	}
803	<	}
804	<
805	<	/**
806	<	* drainTo(this) throws IAE
643	>	* A deserialized serialized queue has same elements in same order
644		*/
645	<	public void testDrainToSelf() {
646	<	LinkedTransferQueue q = populatedQueue(SIZE);
647	<	try {
648	<	q.drainTo(q);
649	<	shouldThrow();
650	<	} catch (IllegalArgumentException success) {
645	>	public void testSerialization() throws Exception {
646	>	Queue x = populatedQueue(SIZE);
647	>	Queue y = serialClone(x);
648	>
649	>	assertNotSame(y, x);
650	>	assertEquals(x.size(), y.size());
651	>	assertEquals(x.toString(), y.toString());
652	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
653	>	while (!x.isEmpty()) {
654	>	assertFalse(y.isEmpty());
655	>	assertEquals(x.remove(), y.remove());
656		}
657	+	assertTrue(y.isEmpty());
658		}
659
660		/**
#	Line 821 | Line 664 | public class LinkedTransferQueueTest ext
664		LinkedTransferQueue q = populatedQueue(SIZE);
665		ArrayList l = new ArrayList();
666		q.drainTo(l);
667	<	assertEquals(q.size(), 0);
668	<	assertEquals(l.size(), SIZE);
667	>	assertEquals(0, q.size());
668	>	assertEquals(SIZE, l.size());
669		for (int i = 0; i < SIZE; ++i) {
670	<	assertEquals(l.get(i), new Integer(i));
670	>	assertEquals(i, l.get(i));
671		}
672		q.add(zero);
673		q.add(one);
#	Line 833 | Line 676 | public class LinkedTransferQueueTest ext
676		assertTrue(q.contains(one));
677		l.clear();
678		q.drainTo(l);
679	<	assertEquals(q.size(), 0);
680	<	assertEquals(l.size(), 2);
679	>	assertEquals(0, q.size());
680	>	assertEquals(2, l.size());
681		for (int i = 0; i < 2; ++i) {
682	<	assertEquals(l.get(i), new Integer(i));
682	>	assertEquals(i, l.get(i));
683		}
684		}
685
686		/**
687	<	* drainTo empties full queue, unblocking a waiting put.
687	>	* drainTo(c) empties full queue, unblocking a waiting put.
688		*/
689	<	public void testDrainToWithActivePut() {
689	>	public void testDrainToWithActivePut() throws InterruptedException {
690		final LinkedTransferQueue q = populatedQueue(SIZE);
691	<	Thread t = new Thread(new Runnable() {
692	<
693	<	public void run() {
694	<	try {
695	<	q.put(new Integer(SIZE + 1));
696	<	} catch (Exception ie) {
697	<	threadUnexpectedException();
698	<	}
699	<	}
700	<	});
701	<	try {
859	<	t.start();
860	<	ArrayList l = new ArrayList();
861	<	q.drainTo(l);
862	<	assertTrue(l.size() >= SIZE);
863	<	for (int i = 0; i < SIZE; ++i) {
864	<	assertEquals(l.get(i), new Integer(i));
865	<	}
866	<	t.join();
867	<	assertTrue(q.size() + l.size() >= SIZE);
868	<	} catch (Exception e) {
869	<	unexpectedException();
870	<	}
871	<	}
872	<
873	<	/**
874	<	* drainTo(null, n) throws NPE
875	<	*/
876	<	public void testDrainToNullN() {
877	<	LinkedTransferQueue q = populatedQueue(SIZE);
878	<	try {
879	<	q.drainTo(null, 0);
880	<	shouldThrow();
881	<	} catch (NullPointerException success) {
882	<	}
883	<	}
884	<
885	<	/**
886	<	* drainTo(this, n) throws IAE
887	<	*/
888	<	public void testDrainToSelfN() {
889	<	LinkedTransferQueue q = populatedQueue(SIZE);
890	<	try {
891	<	q.drainTo(q, 0);
892	<	shouldThrow();
893	<	} catch (IllegalArgumentException success) {
894	<	}
691	>	Thread t = newStartedThread(new CheckedRunnable() {
692	>	public void realRun() {
693	>	q.put(SIZE + 1);
694	>	}});
695	>	ArrayList l = new ArrayList();
696	>	q.drainTo(l);
697	>	assertTrue(l.size() >= SIZE);
698	>	for (int i = 0; i < SIZE; ++i)
699	>	assertEquals(i, l.get(i));
700	>	awaitTermination(t, MEDIUM_DELAY_MS);
701	>	assertTrue(q.size() + l.size() >= SIZE);
702		}
703
704		/**
705	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
705	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
706		*/
707		public void testDrainToN() {
708		LinkedTransferQueue q = new LinkedTransferQueue();
709		for (int i = 0; i < SIZE + 2; ++i) {
710		for (int j = 0; j < SIZE; j++) {
711	<	assertTrue(q.offer(new Integer(j)));
711	>	assertTrue(q.offer(j));
712		}
713		ArrayList l = new ArrayList();
714		q.drainTo(l, i);
715		int k = (i < SIZE) ? i : SIZE;
716	<	assertEquals(l.size(), k);
717	<	assertEquals(q.size(), SIZE - k);
718	<	for (int j = 0; j < k; ++j) {
719	<	assertEquals(l.get(j), new Integer(j));
720	<	}
914	<	while (q.poll() != null);
716	>	assertEquals(k, l.size());
717	>	assertEquals(SIZE - k, q.size());
718	>	for (int j = 0; j < k; ++j)
719	>	assertEquals(j, l.get(j));
720	>	do {} while (q.poll() != null);
721		}
722		}
723
724		/**
725	<	* poll and take should decrement the waiting consumer count
725	>	* timed poll() or take() increments the waiting consumer count;
726	>	* offer(e) decrements the waiting consumer count
727		*/
728	<	public void testWaitingConsumer() {
729	<	try {
730	<	final LinkedTransferQueue q = new LinkedTransferQueue();
731	<	final ConsumerObserver waiting = new ConsumerObserver();
732	<	new Thread(new Runnable() {
926	<
927	<	public void run() {
928	<	try {
929	<	threadAssertTrue(q.hasWaitingConsumer());
930	<	waiting.setWaitingConsumer(q.getWaitingConsumerCount());
931	<	threadAssertTrue(q.offer(new Object()));
932	<	} catch (Exception ex) {
933	<	threadUnexpectedException();
934	<	}
728	>	public void testWaitingConsumer() throws InterruptedException {
729	>	final LinkedTransferQueue q = new LinkedTransferQueue();
730	>	assertEquals(0, q.getWaitingConsumerCount());
731	>	assertFalse(q.hasWaitingConsumer());
732	>	final CountDownLatch threadStarted = new CountDownLatch(1);
733
734	<	}
735	<	}).start();
736	<	assertTrue(q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS) != null);
737	<	assertTrue(q.getWaitingConsumerCount() < waiting.getWaitingConsumers());
738	<	} catch (Exception ex) {
739	<	this.unexpectedException();
740	<	}
734	>	Thread t = newStartedThread(new CheckedRunnable() {
735	>	public void realRun() throws InterruptedException {
736	>	threadStarted.countDown();
737	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
738	>	assertEquals(0, q.getWaitingConsumerCount());
739	>	assertFalse(q.hasWaitingConsumer());
740	>	}});
741	>
742	>	threadStarted.await();
743	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
744	>	assertEquals(1, q.getWaitingConsumerCount());
745	>	assertTrue(q.hasWaitingConsumer());
746	>
747	>	assertTrue(q.offer(one));
748	>	assertEquals(0, q.getWaitingConsumerCount());
749	>	assertFalse(q.hasWaitingConsumer());
750	>
751	>	awaitTermination(t, MEDIUM_DELAY_MS);
752		}
753
754		/**
755	<	* Inserts null into transfer throws NPE
755	>	* transfer(null) throws NullPointerException
756		*/
757	<	public void testTransfer1() {
757	>	public void testTransfer1() throws InterruptedException {
758		try {
759		LinkedTransferQueue q = new LinkedTransferQueue();
760		q.transfer(null);
761		shouldThrow();
762	<	} catch (NullPointerException ex) {
954	<	} catch (Exception ex) {
955	<	this.unexpectedException();
956	<	}
762	>	} catch (NullPointerException success) {}
763		}
764
765		/**
766	<	* transfer attempts to insert into the queue then wait until that
767	<	* object is removed via take or poll.
766	>	* transfer waits until a poll occurs. The transfered element
767	>	* is returned by this associated poll.
768		*/
769	<	public void testTransfer2() {
770	<	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
771	<	new Thread(new Runnable() {
769	>	public void testTransfer2() throws InterruptedException {
770	>	final LinkedTransferQueue<Integer> q
771	>	= new LinkedTransferQueue<Integer>();
772	>	final CountDownLatch threadStarted = new CountDownLatch(1);
773
774	<	public void run() {
775	<	try {
776	<	q.transfer(new Integer(SIZE));
777	<	threadAssertTrue(q.isEmpty());
778	<	} catch (Exception ex) {
779	<	threadUnexpectedException();
973	<	}
974	<	}
975	<	}).start();
774	>	Thread t = newStartedThread(new CheckedRunnable() {
775	>	public void realRun() throws InterruptedException {
776	>	threadStarted.countDown();
777	>	q.transfer(five);
778	>	checkEmpty(q);
779	>	}});
780
781	<	try {
782	<	Thread.sleep(SHORT_DELAY_MS);
783	<	assertEquals(1, q.size());
784	<	q.poll();
785	<	assertTrue(q.isEmpty());
786	<	} catch (Exception ex) {
983	<	this.unexpectedException();
984	<	}
781	>	threadStarted.await();
782	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
783	>	assertEquals(1, q.size());
784	>	assertSame(five, q.poll());
785	>	checkEmpty(q);
786	>	awaitTermination(t, MEDIUM_DELAY_MS);
787		}
788
789		/**
790	<	* transfer will attempt to transfer in fifo order and continue
791	<	* waiting if the element being transfered is not polled or taken
792	<	*/
793	<	public void testTransfer3() {
794	<	final LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
795	<	new Thread(new Runnable() {
796	<	public void run() {
797	<	try {
798	<	Integer i;
799	<	q.transfer((i = new Integer(SIZE + 1)));
800	<	threadAssertTrue(!q.contains(i));
801	<	threadAssertEquals(1, q.size());
802	<	} catch (Exception ex) {
803	<	threadUnexpectedException();
804	<	}
805	<	}
806	<	}).start();
807	<	Thread interruptedThread =
808	<	new Thread(new Runnable() {
809	<	public void run() {
810	<	try {
811	<	q.transfer(new Integer(SIZE));
812	<	threadShouldThrow();
813	<	} catch (InterruptedException ex) {
814	<	}
815	<	}
816	<	});
817	<	interruptedThread.start();
818	<	try {
819	<	Thread.sleep(LONG_DELAY_MS);
1018	<	assertEquals(2, q.size());
1019	<	q.poll();
1020	<	Thread.sleep(LONG_DELAY_MS);
1021	<	interruptedThread.interrupt();
1022	<	assertEquals(1, q.size());
1023	<	} catch (Exception ex) {
1024	<	this.unexpectedException();
1025	<	}
790	>	* transfer waits until a poll occurs, and then transfers in fifo order
791	>	*/
792	>	public void testTransfer3() throws InterruptedException {
793	>	final LinkedTransferQueue<Integer> q
794	>	= new LinkedTransferQueue<Integer>();
795	>
796	>	Thread first = newStartedThread(new CheckedRunnable() {
797	>	public void realRun() throws InterruptedException {
798	>	q.transfer(four);
799	>	assertTrue(!q.contains(four));
800	>	assertEquals(1, q.size());
801	>	}});
802	>
803	>	Thread interruptedThread = newStartedThread(
804	>	new CheckedInterruptedRunnable() {
805	>	public void realRun() throws InterruptedException {
806	>	while (q.isEmpty())
807	>	Thread.yield();
808	>	q.transfer(five);
809	>	}});
810	>
811	>	while (q.size() < 2)
812	>	Thread.yield();
813	>	assertEquals(2, q.size());
814	>	assertSame(four, q.poll());
815	>	first.join();
816	>	assertEquals(1, q.size());
817	>	interruptedThread.interrupt();
818	>	interruptedThread.join();
819	>	checkEmpty(q);
820		}
821
822		/**
823	<	* transfer will wait as long as a poll or take occurs if one does occur
824	<	* the waiting is finished and the thread that tries to poll/take
1031	<	* wins in retrieving the element
823	>	* transfer waits until a poll occurs, at which point the polling
824	>	* thread returns the element
825		*/
826	<	public void testTransfer4() {
826	>	public void testTransfer4() throws InterruptedException {
827		final LinkedTransferQueue q = new LinkedTransferQueue();
1035	–	new Thread(new Runnable() {
828
829	<	public void run() {
830	<	try {
831	<	q.transfer(new Integer(four));
832	<	threadAssertFalse(q.contains(new Integer(four)));
833	<	threadAssertEquals(new Integer(three), q.poll());
834	<	} catch (Exception ex) {
835	<	threadUnexpectedException();
836	<	}
837	<	}
838	<	}).start();
839	<	try {
840	<	Thread.sleep(MEDIUM_DELAY_MS);
841	<	assertTrue(q.offer(three));
842	<	assertEquals(new Integer(four), q.poll());
1051	<	} catch (Exception ex) {
1052	<	this.unexpectedException();
1053	<	}
829	>	Thread t = newStartedThread(new CheckedRunnable() {
830	>	public void realRun() throws InterruptedException {
831	>	q.transfer(four);
832	>	assertFalse(q.contains(four));
833	>	assertSame(three, q.poll());
834	>	}});
835	>
836	>	while (q.isEmpty())
837	>	Thread.yield();
838	>	assertFalse(q.isEmpty());
839	>	assertEquals(1, q.size());
840	>	assertTrue(q.offer(three));
841	>	assertSame(four, q.poll());
842	>	awaitTermination(t, MEDIUM_DELAY_MS);
843		}
844
845		/**
846	<	* Insert null into tryTransfer throws NPE
846	>	* transfer waits until a take occurs. The transfered element
847	>	* is returned by this associated take.
848	>	*/
849	>	public void testTransfer5() throws InterruptedException {
850	>	final LinkedTransferQueue<Integer> q
851	>	= new LinkedTransferQueue<Integer>();
852	>
853	>	Thread t = newStartedThread(new CheckedRunnable() {
854	>	public void realRun() throws InterruptedException {
855	>	q.transfer(four);
856	>	checkEmpty(q);
857	>	}});
858	>
859	>	while (q.isEmpty())
860	>	Thread.yield();
861	>	assertFalse(q.isEmpty());
862	>	assertEquals(1, q.size());
863	>	assertSame(four, q.take());
864	>	checkEmpty(q);
865	>	awaitTermination(t, MEDIUM_DELAY_MS);
866	>	}
867	>
868	>	/**
869	>	* tryTransfer(null) throws NullPointerException
870		*/
871		public void testTryTransfer1() {
872	+	final LinkedTransferQueue q = new LinkedTransferQueue();
873		try {
1061	–	final LinkedTransferQueue q = new LinkedTransferQueue();
874		q.tryTransfer(null);
875	<	this.shouldThrow();
876	<	} catch (NullPointerException ex) {
1065	<	} catch (Exception ex) {
1066	<	this.unexpectedException();
1067	<	}
875	>	shouldThrow();
876	>	} catch (NullPointerException success) {}
877		}
878
879		/**
880	<	* tryTransfer returns false and does not enqueue if there are no consumers
881	<	* waiting to poll or take.
880	>	* tryTransfer returns false and does not enqueue if there are no
881	>	* consumers waiting to poll or take.
882		*/
883	<	public void testTryTransfer2() {
884	<	try {
885	<	final LinkedTransferQueue q = new LinkedTransferQueue();
886	<	assertFalse(q.tryTransfer(new Object()));
887	<	assertEquals(0, q.size());
1079	<	} catch (Exception ex) {
1080	<	this.unexpectedException();
1081	<	}
883	>	public void testTryTransfer2() throws InterruptedException {
884	>	final LinkedTransferQueue q = new LinkedTransferQueue();
885	>	assertFalse(q.tryTransfer(new Object()));
886	>	assertFalse(q.hasWaitingConsumer());
887	>	checkEmpty(q);
888		}
889
890		/**
891	<	* if there is a consumer waiting poll or take tryTransfer returns
892	<	* true while enqueueing object
891	>	* If there is a consumer waiting in timed poll, tryTransfer
892	>	* returns true while successfully transfering object.
893		*/
894	<	public void testTryTransfer3() {
895	<	try {
896	<	final LinkedTransferQueue q = new LinkedTransferQueue();
1091	<	new Thread(new Runnable() {
894	>	public void testTryTransfer3() throws InterruptedException {
895	>	final Object hotPotato = new Object();
896	>	final LinkedTransferQueue q = new LinkedTransferQueue();
897
898	<	public void run() {
899	<	try {
900	<	threadAssertTrue(q.hasWaitingConsumer());
901	<	threadAssertTrue(q.tryTransfer(new Object()));
902	<	} catch (Exception ex) {
903	<	threadUnexpectedException();
904	<	}
898	>	Thread t = newStartedThread(new CheckedRunnable() {
899	>	public void realRun() {
900	>	while (! q.hasWaitingConsumer())
901	>	Thread.yield();
902	>	assertTrue(q.hasWaitingConsumer());
903	>	checkEmpty(q);
904	>	assertTrue(q.tryTransfer(hotPotato));
905	>	}});
906	>
907	>	assertSame(hotPotato, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
908	>	checkEmpty(q);
909	>	awaitTermination(t, MEDIUM_DELAY_MS);
910	>	}
911
912	<	}
913	<	}).start();
914	<	assertTrue(q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS) != null);
915	<	assertTrue(q.isEmpty());
916	<	} catch (Exception ex) {
917	<	this.unexpectedException();
918	<	}
912	>	/**
913	>	* If there is a consumer waiting in take, tryTransfer returns
914	>	* true while successfully transfering object.
915	>	*/
916	>	public void testTryTransfer4() throws InterruptedException {
917	>	final Object hotPotato = new Object();
918	>	final LinkedTransferQueue q = new LinkedTransferQueue();
919	>
920	>	Thread t = newStartedThread(new CheckedRunnable() {
921	>	public void realRun() {
922	>	while (! q.hasWaitingConsumer())
923	>	Thread.yield();
924	>	assertTrue(q.hasWaitingConsumer());
925	>	checkEmpty(q);
926	>	assertTrue(q.tryTransfer(hotPotato));
927	>	}});
928	>
929	>	assertSame(q.take(), hotPotato);
930	>	checkEmpty(q);
931	>	awaitTermination(t, MEDIUM_DELAY_MS);
932		}
933
934		/**
935	<	* tryTransfer waits the amount given if interrupted, show an
1112	<	* interrupted exception
935	>	* tryTransfer blocks interruptibly if no takers
936		*/
937	<	public void testTryTransfer4() {
937	>	public void testTryTransfer5() throws InterruptedException {
938		final LinkedTransferQueue q = new LinkedTransferQueue();
939	<	Thread toInterrupt = new Thread(new Runnable() {
939	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
940	>	assertTrue(q.isEmpty());
941
942	<	public void run() {
942	>	Thread t = newStartedThread(new CheckedRunnable() {
943	>	public void realRun() throws InterruptedException {
944	>	Thread.currentThread().interrupt();
945		try {
946	<	q.tryTransfer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
947	<	threadShouldThrow();
948	<	} catch (InterruptedException ex) {
949	<	}
950	<	}
951	<	});
952	<	try {
953	<	toInterrupt.start();
954	<	Thread.sleep(SMALL_DELAY_MS);
955	<	toInterrupt.interrupt();
956	<	} catch (Exception ex) {
957	<	this.unexpectedException();
958	<	}
946	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
947	>	shouldThrow();
948	>	} catch (InterruptedException success) {}
949	>	assertFalse(Thread.interrupted());
950	>
951	>	pleaseInterrupt.countDown();
952	>	try {
953	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
954	>	shouldThrow();
955	>	} catch (InterruptedException success) {}
956	>	assertFalse(Thread.interrupted());
957	>	}});
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 testTryTransfer5() {
969	>	public void testTryTransfer6() throws InterruptedException {
970		final LinkedTransferQueue q = new LinkedTransferQueue();
1140	–	try {
1141	–	new Thread(new Runnable() {
971
972	<	public void run() {
973	<	try {
974	<	threadAssertFalse(q.tryTransfer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
975	<	} catch (InterruptedException ex) {
976	<	threadUnexpectedException();
977	<	}
978	<	}
979	<	}).start();
980	<	Thread.sleep(LONG_DELAY_MS);
981	<	assertTrue(q.isEmpty());
982	<	} catch (Exception ex) {
1154	<	this.unexpectedException();
1155	<	}
972	>	Thread t = newStartedThread(new CheckedRunnable() {
973	>	public void realRun() throws InterruptedException {
974	>	long t0 = System.nanoTime();
975	>	assertFalse(q.tryTransfer(new Object(),
976	>	timeoutMillis(), MILLISECONDS));
977	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
978	>	checkEmpty(q);
979	>	}});
980	>
981	>	awaitTermination(t);
982	>	checkEmpty(q);
983		}
984
985		/**
986		* tryTransfer waits for any elements previously in to be removed
987		* before transfering to a poll or take
988		*/
989	<	public void testTryTransfer6() {
989	>	public void testTryTransfer7() throws InterruptedException {
990		final LinkedTransferQueue q = new LinkedTransferQueue();
991	<	q.offer(new Integer(four));
1165	<	new Thread(new Runnable() {
991	>	assertTrue(q.offer(four));
992
993	<	public void run() {
994	<	try {
995	<	threadAssertTrue(q.tryTransfer(new Integer(five), LONG_DELAY_MS, TimeUnit.MILLISECONDS));
996	<	threadAssertTrue(q.isEmpty());
997	<	} catch (InterruptedException ex) {
998	<	threadUnexpectedException();
999	<	}
1000	<	}
1001	<	}).start();
1002	<	try {
1003	<	Thread.sleep(SHORT_DELAY_MS);
1004	<	assertEquals(2, q.size());
1005	<	assertEquals(new Integer(four), q.poll());
1180	<	assertEquals(new Integer(five), q.poll());
1181	<	assertTrue(q.isEmpty());
1182	<	} catch (Exception ex) {
1183	<	this.unexpectedException();
1184	<	}
993	>	Thread t = newStartedThread(new CheckedRunnable() {
994	>	public void realRun() throws InterruptedException {
995	>	assertTrue(q.tryTransfer(five, MEDIUM_DELAY_MS, MILLISECONDS));
996	>	checkEmpty(q);
997	>	}});
998	>
999	>	while (q.size() != 2)
1000	>	Thread.yield();
1001	>	assertEquals(2, q.size());
1002	>	assertSame(four, q.poll());
1003	>	assertSame(five, q.poll());
1004	>	checkEmpty(q);
1005	>	awaitTermination(t, MEDIUM_DELAY_MS);
1006		}
1007
1008		/**
1009	<	* tryTransfer attempts to enqueue into the q and fails returning false not
1010	<	* enqueueing and the successive poll is null
1009	>	* tryTransfer attempts to enqueue into the queue and fails
1010	>	* returning false not enqueueing and the successive poll is null
1011		*/
1012	<	public void testTryTransfer7() {
1012	>	public void testTryTransfer8() throws InterruptedException {
1013		final LinkedTransferQueue q = new LinkedTransferQueue();
1014	<	q.offer(new Integer(four));
1015	<	new Thread(new Runnable() {
1016	<
1017	<	public void run() {
1018	<	try {
1019	<	threadAssertFalse(q.tryTransfer(new Integer(five), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
1020	<	threadAssertTrue(q.isEmpty());
1021	<	} catch (InterruptedException ex) {
1022	<	threadUnexpectedException();
1202	<	}
1203	<	}
1204	<	}).start();
1205	<	try {
1206	<	assertEquals(1, q.size());
1207	<	assertEquals(new Integer(four), q.poll());
1208	<	Thread.sleep(MEDIUM_DELAY_MS);
1209	<	assertNull(q.poll());
1210	<	} catch (Exception ex) {
1211	<	this.unexpectedException();
1212	<	}
1014	>	assertTrue(q.offer(four));
1015	>	assertEquals(1, q.size());
1016	>	long t0 = System.nanoTime();
1017	>	assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
1018	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
1019	>	assertEquals(1, q.size());
1020	>	assertSame(four, q.poll());
1021	>	assertNull(q.poll());
1022	>	checkEmpty(q);
1023		}
1024
1025	<	private LinkedTransferQueue populatedQueue(
1026	<	int n) {
1027	<	LinkedTransferQueue q = new LinkedTransferQueue();
1028	<	assertTrue(q.isEmpty());
1029	<	int remainingCapacity = q.remainingCapacity();
1220	<	for (int i = 0; i <
1221	<	n; i++) {
1025	>	private LinkedTransferQueue<Integer> populatedQueue(int n) {
1026	>	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1027	>	checkEmpty(q);
1028	>	for (int i = 0; i < n; i++) {
1029	>	assertEquals(i, q.size());
1030		assertTrue(q.offer(i));
1031	+	assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
1032		}
1224	–
1033		assertFalse(q.isEmpty());
1226	–	assertEquals(remainingCapacity, q.remainingCapacity());
1227	–	assertEquals(n, q.size());
1034		return q;
1035		}
1036
1037	<	private static class ConsumerObserver {
1038	<
1039	<	private int waitingConsumers;
1040	<
1041	<	private ConsumerObserver() {
1042	<	}
1043	<
1044	<	private void setWaitingConsumer(int i) {
1045	<	this.waitingConsumers = i;
1046	<	}
1047	<
1048	<	private int getWaitingConsumers() {
1243	<	return waitingConsumers;
1037	>	/**
1038	>	* remove(null), contains(null) always return false
1039	>	*/
1040	>	public void testNeverContainsNull() {
1041	>	Collection<?>[] qs = {
1042	>	new LinkedTransferQueue<Object>(),
1043	>	populatedQueue(2),
1044	>	};
1045	>
1046	>	for (Collection<?> q : qs) {
1047	>	assertFalse(q.contains(null));
1048	>	assertFalse(q.remove(null));
1049		}
1050		}
1051		}

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