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Comparing jsr166/src/test/tck/ArrayBlockingQueueTest.java (file contents):
Revision 1.10 by dl, Thu Jan 8 01:29:46 2004 UTC vs.
Revision 1.90 by jsr166, Sun May 14 04:14:09 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
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10
11	<	import junit.framework.*;
12	<	import java.util.*;
13	<	import java.util.concurrent.*;
14	<	import java.io.*;
11	>	import java.util.ArrayList;
12	>	import java.util.Arrays;
13	>	import java.util.Collection;
14	>	import java.util.Collections;
15	>	import java.util.Iterator;
16	>	import java.util.NoSuchElementException;
17	>	import java.util.Queue;
18	>	import java.util.concurrent.ArrayBlockingQueue;
19	>	import java.util.concurrent.BlockingQueue;
20	>	import java.util.concurrent.CountDownLatch;
21	>	import java.util.concurrent.Executors;
22	>	import java.util.concurrent.ExecutorService;
23	>	import java.util.concurrent.ThreadLocalRandom;
24	>
25	>	import junit.framework.Test;
26
27		public class ArrayBlockingQueueTest extends JSR166TestCase {
28	+
29		public static void main(String[] args) {
30	<	junit.textui.TestRunner.run (suite());
30	>	main(suite(), args);
31		}
32	+
33		public static Test suite() {
34	<	return new TestSuite(ArrayBlockingQueueTest.class);
34	>	class Implementation implements CollectionImplementation {
35	>	public Class<?> klazz() { return ArrayBlockingQueue.class; }
36	>	public Collection emptyCollection() {
37	>	boolean fair = ThreadLocalRandom.current().nextBoolean();
38	>	return populatedQueue(0, SIZE, 2 * SIZE, fair);
39	>	}
40	>	public Object makeElement(int i) { return i; }
41	>	public boolean isConcurrent() { return true; }
42	>	public boolean permitsNulls() { return false; }
43	>	}
44	>
45	>	return newTestSuite(
46	>	ArrayBlockingQueueTest.class,
47	>	new Fair().testSuite(),
48	>	new NonFair().testSuite(),
49	>	CollectionTest.testSuite(new Implementation()));
50	>	}
51	>
52	>	public static class Fair extends BlockingQueueTest {
53	>	protected BlockingQueue emptyCollection() {
54	>	return populatedQueue(0, SIZE, 2 * SIZE, true);
55	>	}
56	>	}
57	>
58	>	public static class NonFair extends BlockingQueueTest {
59	>	protected BlockingQueue emptyCollection() {
60	>	return populatedQueue(0, SIZE, 2 * SIZE, false);
61	>	}
62	>	}
63	>
64	>	/**
65	>	* Returns a new queue of given size containing consecutive
66	>	* Integers 0 ... n - 1.
67	>	*/
68	>	static ArrayBlockingQueue<Integer> populatedQueue(int n) {
69	>	return populatedQueue(n, n, n, false);
70		}
71
72		/**
73	<	* Create a queue of given size containing consecutive
74	<	* Integers 0 ... n.
73	>	* Returns a new queue of given size containing consecutive
74	>	* Integers 0 ... n - 1, with given capacity range and fairness.
75		*/
76	<	private ArrayBlockingQueue populatedQueue(int n) {
77	<	ArrayBlockingQueue q = new ArrayBlockingQueue(n);
76	>	static ArrayBlockingQueue<Integer> populatedQueue(
77	>	int size, int minCapacity, int maxCapacity, boolean fair) {
78	>	ThreadLocalRandom rnd = ThreadLocalRandom.current();
79	>	int capacity = rnd.nextInt(minCapacity, maxCapacity + 1);
80	>	ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<>(capacity);
81		assertTrue(q.isEmpty());
82	<	for(int i = 0; i < n; i++)
83	<	assertTrue(q.offer(new Integer(i)));
84	<	assertFalse(q.isEmpty());
85	<	assertEquals(0, q.remainingCapacity());
86	<	assertEquals(n, q.size());
82	>	// shuffle circular array elements so they wrap
83	>	{
84	>	int n = rnd.nextInt(capacity);
85	>	for (int i = 0; i < n; i++) q.add(42);
86	>	for (int i = 0; i < n; i++) q.remove();
87	>	}
88	>	for (int i = 0; i < size; i++)
89	>	assertTrue(q.offer((Integer) i));
90	>	assertEquals(size == 0, q.isEmpty());
91	>	assertEquals(capacity - size, q.remainingCapacity());
92	>	assertEquals(size, q.size());
93	>	if (size > 0)
94	>	assertEquals((Integer) 0, q.peek());
95		return q;
96		}
97	<
97	>
98		/**
99		* A new queue has the indicated capacity
100		*/
#	Line 43 | Line 103 | public class ArrayBlockingQueueTest exte
103		}
104
105		/**
106	<	* Constructor throws IAE if  capacity argument nonpositive
106	>	* Constructor throws IAE if capacity argument nonpositive
107		*/
108	<	public void testConstructor2() {
109	<	try {
110	<	ArrayBlockingQueue q = new ArrayBlockingQueue(0);
111	<	shouldThrow();
108	>	public void testConstructor_nonPositiveCapacity() {
109	>	for (int i : new int[] { 0, -1, Integer.MIN_VALUE }) {
110	>	try {
111	>	new ArrayBlockingQueue(i);
112	>	shouldThrow();
113	>	} catch (IllegalArgumentException success) {}
114	>	for (boolean fair : new boolean[] { true, false }) {
115	>	try {
116	>	new ArrayBlockingQueue(i, fair);
117	>	shouldThrow();
118	>	} catch (IllegalArgumentException success) {}
119	>	}
120		}
53	–	catch (IllegalArgumentException success) {}
121		}
122
123		/**
124		* Initializing from null Collection throws NPE
125		*/
126	<	public void testConstructor3() {
126	>	public void testConstructor_nullCollection() {
127		try {
128	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1, true, null);
128	>	new ArrayBlockingQueue(1, true, null);
129		shouldThrow();
130	<	}
64	<	catch (NullPointerException success) {}
130	>	} catch (NullPointerException success) {}
131		}
132
133		/**
134		* Initializing from Collection of null elements throws NPE
135		*/
136		public void testConstructor4() {
137	+	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
138		try {
139	<	Integer[] ints = new Integer[SIZE];
73	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
139	>	new ArrayBlockingQueue(SIZE, false, elements);
140		shouldThrow();
141	<	}
76	<	catch (NullPointerException success) {}
141	>	} catch (NullPointerException success) {}
142		}
143
144		/**
145		* Initializing from Collection with some null elements throws NPE
146		*/
147		public void testConstructor5() {
148	+	Integer[] ints = new Integer[SIZE];
149	+	for (int i = 0; i < SIZE - 1; ++i)
150	+	ints[i] = i;
151	+	Collection<Integer> elements = Arrays.asList(ints);
152		try {
153	<	Integer[] ints = new Integer[SIZE];
85	<	for (int i = 0; i < SIZE-1; ++i)
86	<	ints[i] = new Integer(i);
87	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
153	>	new ArrayBlockingQueue(SIZE, false, elements);
154		shouldThrow();
155	<	}
90	<	catch (NullPointerException success) {}
155	>	} catch (NullPointerException success) {}
156		}
157
158		/**
159		* Initializing from too large collection throws IAE
160		*/
161	<	public void testConstructor6() {
161	>	public void testConstructor_collectionTooLarge() {
162	>	// just barely fits - succeeds
163	>	new ArrayBlockingQueue(SIZE, false,
164	>	Collections.nCopies(SIZE, ""));
165		try {
166	<	Integer[] ints = new Integer[SIZE];
167	<	for (int i = 0; i < SIZE; ++i)
100	<	ints[i] = new Integer(i);
101	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1, false, Arrays.asList(ints));
166	>	new ArrayBlockingQueue(SIZE - 1, false,
167	>	Collections.nCopies(SIZE, ""));
168		shouldThrow();
169	<	}
104	<	catch (IllegalArgumentException success) {}
169	>	} catch (IllegalArgumentException success) {}
170		}
171
172		/**
173		* Queue contains all elements of collection used to initialize
174		*/
175		public void testConstructor7() {
176	<	try {
177	<	Integer[] ints = new Integer[SIZE];
178	<	for (int i = 0; i < SIZE; ++i)
179	<	ints[i] = new Integer(i);
180	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, true, Arrays.asList(ints));
181	<	for (int i = 0; i < SIZE; ++i)
182	<	assertEquals(ints[i], q.poll());
118	<	}
119	<	finally {}
176	>	Integer[] ints = new Integer[SIZE];
177	>	for (int i = 0; i < SIZE; ++i)
178	>	ints[i] = i;
179	>	Collection<Integer> elements = Arrays.asList(ints);
180	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, true, elements);
181	>	for (int i = 0; i < SIZE; ++i)
182	>	assertEquals(ints[i], q.poll());
183		}
184
185		/**
186		* Queue transitions from empty to full when elements added
187		*/
188		public void testEmptyFull() {
189	<	ArrayBlockingQueue q = new ArrayBlockingQueue(2);
189	>	BlockingQueue q = populatedQueue(0, 2, 2, false);
190		assertTrue(q.isEmpty());
191		assertEquals(2, q.remainingCapacity());
192		q.add(one);
193		assertFalse(q.isEmpty());
194	<	q.add(two);
194	>	assertTrue(q.offer(two));
195		assertFalse(q.isEmpty());
196		assertEquals(0, q.remainingCapacity());
197		assertFalse(q.offer(three));
#	Line 138 | Line 201 | public class ArrayBlockingQueueTest exte
201		* remainingCapacity decreases on add, increases on remove
202		*/
203		public void testRemainingCapacity() {
204	<	ArrayBlockingQueue q = populatedQueue(SIZE);
205	<	for (int i = 0; i < SIZE; ++i) {
206	<	assertEquals(i, q.remainingCapacity());
207	<	assertEquals(SIZE-i, q.size());
208	<	q.remove();
209	<	}
210	<	for (int i = 0; i < SIZE; ++i) {
211	<	assertEquals(SIZE-i, q.remainingCapacity());
212	<	assertEquals(i, q.size());
213	<	q.add(new Integer(i));
204	>	int size = ThreadLocalRandom.current().nextInt(1, SIZE);
205	>	BlockingQueue q = populatedQueue(size, size, 2 * size, false);
206	>	int spare = q.remainingCapacity();
207	>	int capacity = spare + size;
208	>	for (int i = 0; i < size; i++) {
209	>	assertEquals(spare + i, q.remainingCapacity());
210	>	assertEquals(capacity, q.size() + q.remainingCapacity());
211	>	assertEquals(i, q.remove());
212	>	}
213	>	for (int i = 0; i < size; i++) {
214	>	assertEquals(capacity - i, q.remainingCapacity());
215	>	assertEquals(capacity, q.size() + q.remainingCapacity());
216	>	assertTrue(q.add(i));
217		}
218		}
219
220		/**
155	–	*  offer(null) throws NPE
156	–	*/
157	–	public void testOfferNull() {
158	–	try {
159	–	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
160	–	q.offer(null);
161	–	shouldThrow();
162	–	} catch (NullPointerException success) { }
163	–	}
164	–
165	–	/**
166	–	*  add(null) throws NPE
167	–	*/
168	–	public void testAddNull() {
169	–	try {
170	–	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
171	–	q.add(null);
172	–	shouldThrow();
173	–	} catch (NullPointerException success) { }
174	–	}
175	–
176	–	/**
221		* Offer succeeds if not full; fails if full
222		*/
223		public void testOffer() {
#	Line 186 | Line 230 | public class ArrayBlockingQueueTest exte
230		* add succeeds if not full; throws ISE if full
231		*/
232		public void testAdd() {
233	<	try {
234	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
235	<	for (int i = 0; i < SIZE; ++i) {
192	<	assertTrue(q.add(new Integer(i)));
193	<	}
194	<	assertEquals(0, q.remainingCapacity());
195	<	q.add(new Integer(SIZE));
196	<	} catch (IllegalStateException success){
197	<	}
198	<	}
199	<
200	<	/**
201	<	*  addAll(null) throws NPE
202	<	*/
203	<	public void testAddAll1() {
233	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
234	>	for (int i = 0; i < SIZE; i++) assertTrue(q.add((Integer) i));
235	>	assertEquals(0, q.remainingCapacity());
236		try {
237	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
206	<	q.addAll(null);
237	>	q.add((Integer) SIZE);
238		shouldThrow();
239	<	}
209	<	catch (NullPointerException success) {}
239	>	} catch (IllegalStateException success) {}
240		}
241
242		/**
243		* addAll(this) throws IAE
244		*/
245		public void testAddAllSelf() {
246	+	ArrayBlockingQueue q = populatedQueue(SIZE);
247		try {
217	–	ArrayBlockingQueue q = populatedQueue(SIZE);
248		q.addAll(q);
249		shouldThrow();
250	<	}
221	<	catch (IllegalArgumentException success) {}
250	>	} catch (IllegalArgumentException success) {}
251		}
252
224	–
225	–	/**
226	–	*  addAll of a collection with null elements throws NPE
227	–	*/
228	–	public void testAddAll2() {
229	–	try {
230	–	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
231	–	Integer[] ints = new Integer[SIZE];
232	–	q.addAll(Arrays.asList(ints));
233	–	shouldThrow();
234	–	}
235	–	catch (NullPointerException success) {}
236	–	}
253		/**
254		* addAll of a collection with any null elements throws NPE after
255		* possibly adding some elements
256		*/
257		public void testAddAll3() {
258	+	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
259	+	Integer[] ints = new Integer[SIZE];
260	+	for (int i = 0; i < SIZE - 1; ++i)
261	+	ints[i] = new Integer(i);
262		try {
243	–	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
244	–	Integer[] ints = new Integer[SIZE];
245	–	for (int i = 0; i < SIZE-1; ++i)
246	–	ints[i] = new Integer(i);
263		q.addAll(Arrays.asList(ints));
264		shouldThrow();
265	<	}
250	<	catch (NullPointerException success) {}
265	>	} catch (NullPointerException success) {}
266		}
267	+
268		/**
269		* addAll throws ISE if not enough room
270		*/
271	<	public void testAddAll4() {
271	>	public void testAddAll_insufficientSpace() {
272	>	int size = ThreadLocalRandom.current().nextInt(1, SIZE);
273	>	ArrayBlockingQueue q = populatedQueue(0, size, size, false);
274	>	// Just fits:
275	>	q.addAll(populatedQueue(size, size, 2 * size, false));
276	>	assertEquals(0, q.remainingCapacity());
277	>	assertEquals(size, q.size());
278	>	assertEquals(0, q.peek());
279		try {
280	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
281	<	Integer[] ints = new Integer[SIZE];
259	<	for (int i = 0; i < SIZE; ++i)
260	<	ints[i] = new Integer(i);
261	<	q.addAll(Arrays.asList(ints));
280	>	q = populatedQueue(0, size, size, false);
281	>	q.addAll(Collections.nCopies(size + 1, 42));
282		shouldThrow();
283	<	}
264	<	catch (IllegalStateException success) {}
283	>	} catch (IllegalStateException success) {}
284		}
285	+
286		/**
287		* Queue contains all elements, in traversal order, of successful addAll
288		*/
289		public void testAddAll5() {
290	<	try {
291	<	Integer[] empty = new Integer[0];
292	<	Integer[] ints = new Integer[SIZE];
293	<	for (int i = 0; i < SIZE; ++i)
294	<	ints[i] = new Integer(i);
295	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
296	<	assertFalse(q.addAll(Arrays.asList(empty)));
297	<	assertTrue(q.addAll(Arrays.asList(ints)));
298	<	for (int i = 0; i < SIZE; ++i)
279	<	assertEquals(ints[i], q.poll());
280	<	}
281	<	finally {}
290	>	Integer[] empty = new Integer[0];
291	>	Integer[] ints = new Integer[SIZE];
292	>	for (int i = 0; i < SIZE; ++i)
293	>	ints[i] = new Integer(i);
294	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
295	>	assertFalse(q.addAll(Arrays.asList(empty)));
296	>	assertTrue(q.addAll(Arrays.asList(ints)));
297	>	for (int i = 0; i < SIZE; ++i)
298	>	assertEquals(ints[i], q.poll());
299		}
300
301		/**
285	–	*  put(null) throws NPE
286	–	*/
287	–	public void testPutNull() {
288	–	try {
289	–	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
290	–	q.put(null);
291	–	shouldThrow();
292	–	}
293	–	catch (NullPointerException success){
294	–	}
295	–	catch (InterruptedException ie) {
296	–	unexpectedException();
297	–	}
298	–	}
299	–
300	–	/**
302		* all elements successfully put are contained
303		*/
304	<	public void testPut() {
305	<	try {
306	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
307	<	for (int i = 0; i < SIZE; ++i) {
308	<	Integer I = new Integer(i);
309	<	q.put(I);
309	<	assertTrue(q.contains(I));
310	<	}
311	<	assertEquals(0, q.remainingCapacity());
312	<	}
313	<	catch (InterruptedException ie) {
314	<	unexpectedException();
304	>	public void testPut() throws InterruptedException {
305	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
306	>	for (int i = 0; i < SIZE; ++i) {
307	>	Integer x = new Integer(i);
308	>	q.put(x);
309	>	assertTrue(q.contains(x));
310		}
311	+	assertEquals(0, q.remainingCapacity());
312		}
313
314		/**
315		* put blocks interruptibly if full
316		*/
317	<	public void testBlockingPut() {
317	>	public void testBlockingPut() throws InterruptedException {
318		final ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
319	<	Thread t = new Thread(new Runnable() {
320	<	public void run() {
321	<	int added = 0;
322	<	try {
323	<	for (int i = 0; i < SIZE; ++i) {
324	<	q.put(new Integer(i));
325	<	++added;
326	<	}
327	<	q.put(new Integer(SIZE));
328	<	threadShouldThrow();
329	<	} catch (InterruptedException ie){
330	<	threadAssertEquals(added, SIZE);
331	<	}
332	<	}});
333	<	try {
334	<	t.start();
335	<	Thread.sleep(MEDIUM_DELAY_MS);
336	<	t.interrupt();
337	<	t.join();
338	<	}
339	<	catch (InterruptedException ie) {
340	<	unexpectedException();
341	<	}
319	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
320	>	Thread t = newStartedThread(new CheckedRunnable() {
321	>	public void realRun() throws InterruptedException {
322	>	for (int i = 0; i < SIZE; ++i)
323	>	q.put(i);
324	>	assertEquals(SIZE, q.size());
325	>	assertEquals(0, q.remainingCapacity());
326	>
327	>	Thread.currentThread().interrupt();
328	>	try {
329	>	q.put(99);
330	>	shouldThrow();
331	>	} catch (InterruptedException success) {}
332	>	assertFalse(Thread.interrupted());
333	>
334	>	pleaseInterrupt.countDown();
335	>	try {
336	>	q.put(99);
337	>	shouldThrow();
338	>	} catch (InterruptedException success) {}
339	>	assertFalse(Thread.interrupted());
340	>	}});
341	>
342	>	await(pleaseInterrupt);
343	>	assertThreadBlocks(t, Thread.State.WAITING);
344	>	t.interrupt();
345	>	awaitTermination(t);
346	>	assertEquals(SIZE, q.size());
347	>	assertEquals(0, q.remainingCapacity());
348		}
349
350		/**
351	<	* put blocks waiting for take when full
351	>	* put blocks interruptibly waiting for take when full
352		*/
353	<	public void testPutWithTake() {
354	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
355	<	Thread t = new Thread(new Runnable() {
356	<	public void run() {
357	<	int added = 0;
358	<	try {
359	<	q.put(new Object());
360	<	++added;
361	<	q.put(new Object());
362	<	++added;
363	<	q.put(new Object());
364	<	++added;
365	<	q.put(new Object());
366	<	++added;
367	<	threadShouldThrow();
368	<	} catch (InterruptedException e){
369	<	threadAssertTrue(added >= 2);
370	<	}
371	<	}
372	<	});
373	<	try {
374	<	t.start();
375	<	Thread.sleep(SHORT_DELAY_MS);
376	<	q.take();
377	<	t.interrupt();
378	<	t.join();
379	<	} catch (Exception e){
380	<	unexpectedException();
381	<	}
353	>	public void testPutWithTake() throws InterruptedException {
354	>	final int capacity = 2;
355	>	final ArrayBlockingQueue q = new ArrayBlockingQueue(capacity);
356	>	final CountDownLatch pleaseTake = new CountDownLatch(1);
357	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
358	>	Thread t = newStartedThread(new CheckedRunnable() {
359	>	public void realRun() throws InterruptedException {
360	>	for (int i = 0; i < capacity; i++)
361	>	q.put(i);
362	>	pleaseTake.countDown();
363	>	q.put(86);
364	>
365	>	Thread.currentThread().interrupt();
366	>	try {
367	>	q.put(99);
368	>	shouldThrow();
369	>	} catch (InterruptedException success) {}
370	>	assertFalse(Thread.interrupted());
371	>
372	>	pleaseInterrupt.countDown();
373	>	try {
374	>	q.put(99);
375	>	shouldThrow();
376	>	} catch (InterruptedException success) {}
377	>	assertFalse(Thread.interrupted());
378	>	}});
379	>
380	>	await(pleaseTake);
381	>	assertEquals(0, q.remainingCapacity());
382	>	assertEquals(0, q.take());
383	>
384	>	await(pleaseInterrupt);
385	>	assertThreadBlocks(t, Thread.State.WAITING);
386	>	t.interrupt();
387	>	awaitTermination(t);
388	>	assertEquals(0, q.remainingCapacity());
389		}
390
391		/**
#	Line 384 | Line 393 | public class ArrayBlockingQueueTest exte
393		*/
394		public void testTimedOffer() {
395		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
396	<	Thread t = new Thread(new Runnable() {
397	<	public void run() {
398	<	try {
399	<	q.put(new Object());
400	<	q.put(new Object());
401	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
402	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
403	<	threadShouldThrow();
395	<	} catch (InterruptedException success){}
396	<	}
397	<	});
398	<
399	<	try {
400	<	t.start();
401	<	Thread.sleep(SHORT_DELAY_MS);
402	<	t.interrupt();
403	<	t.join();
404	<	} catch (Exception e){
405	<	unexpectedException();
406	<	}
407	<	}
396	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
397	>	Thread t = newStartedThread(new CheckedRunnable() {
398	>	public void realRun() throws InterruptedException {
399	>	q.put(new Object());
400	>	q.put(new Object());
401	>	long startTime = System.nanoTime();
402	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
403	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
404
405	<	/**
406	<	* take retrieves elements in FIFO order
407	<	*/
408	<	public void testTake() {
409	<	try {
410	<	ArrayBlockingQueue q = populatedQueue(SIZE);
411	<	for (int i = 0; i < SIZE; ++i) {
412	<	assertEquals(i, ((Integer)q.take()).intValue());
413	<	}
414	<	} catch (InterruptedException e){
415	<	unexpectedException();
416	<	}
405	>	Thread.currentThread().interrupt();
406	>	try {
407	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
408	>	shouldThrow();
409	>	} catch (InterruptedException success) {}
410	>	assertFalse(Thread.interrupted());
411	>
412	>	pleaseInterrupt.countDown();
413	>	try {
414	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
415	>	shouldThrow();
416	>	} catch (InterruptedException success) {}
417	>	assertFalse(Thread.interrupted());
418	>	}});
419	>
420	>	await(pleaseInterrupt);
421	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
422	>	t.interrupt();
423	>	awaitTermination(t);
424		}
425
426		/**
427	<	* take blocks interruptibly when empty
427	>	* take retrieves elements in FIFO order
428		*/
429	<	public void testTakeFromEmpty() {
430	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
431	<	Thread t = new Thread(new Runnable() {
432	<	public void run() {
430	<	try {
431	<	q.take();
432	<	threadShouldThrow();
433	<	} catch (InterruptedException success){ }
434	<	}
435	<	});
436	<	try {
437	<	t.start();
438	<	Thread.sleep(SHORT_DELAY_MS);
439	<	t.interrupt();
440	<	t.join();
441	<	} catch (Exception e){
442	<	unexpectedException();
429	>	public void testTake() throws InterruptedException {
430	>	ArrayBlockingQueue q = populatedQueue(SIZE);
431	>	for (int i = 0; i < SIZE; ++i) {
432	>	assertEquals(i, q.take());
433		}
434		}
435
436		/**
437		* Take removes existing elements until empty, then blocks interruptibly
438		*/
439	<	public void testBlockingTake() {
440	<	Thread t = new Thread(new Runnable() {
441	<	public void run() {
442	<	try {
443	<	ArrayBlockingQueue q = populatedQueue(SIZE);
444	<	for (int i = 0; i < SIZE; ++i) {
455	<	threadAssertEquals(i, ((Integer)q.take()).intValue());
456	<	}
457	<	q.take();
458	<	threadShouldThrow();
459	<	} catch (InterruptedException success){
460	<	}
461	<	}});
462	<	try {
463	<	t.start();
464	<	Thread.sleep(SHORT_DELAY_MS);
465	<	t.interrupt();
466	<	t.join();
467	<	}
468	<	catch (InterruptedException ie) {
469	<	unexpectedException();
470	<	}
471	<	}
439	>	public void testBlockingTake() throws InterruptedException {
440	>	final ArrayBlockingQueue q = populatedQueue(SIZE);
441	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
442	>	Thread t = newStartedThread(new CheckedRunnable() {
443	>	public void realRun() throws InterruptedException {
444	>	for (int i = 0; i < SIZE; i++) assertEquals(i, q.take());
445
446	+	Thread.currentThread().interrupt();
447	+	try {
448	+	q.take();
449	+	shouldThrow();
450	+	} catch (InterruptedException success) {}
451	+	assertFalse(Thread.interrupted());
452	+
453	+	pleaseInterrupt.countDown();
454	+	try {
455	+	q.take();
456	+	shouldThrow();
457	+	} catch (InterruptedException success) {}
458	+	assertFalse(Thread.interrupted());
459	+	}});
460	+
461	+	await(pleaseInterrupt);
462	+	assertThreadBlocks(t, Thread.State.WAITING);
463	+	t.interrupt();
464	+	awaitTermination(t);
465	+	}
466
467		/**
468		* poll succeeds unless empty
#	Line 477 | Line 470 | public class ArrayBlockingQueueTest exte
470		public void testPoll() {
471		ArrayBlockingQueue q = populatedQueue(SIZE);
472		for (int i = 0; i < SIZE; ++i) {
473	<	assertEquals(i, ((Integer)q.poll()).intValue());
473	>	assertEquals(i, q.poll());
474		}
475	<	assertNull(q.poll());
475	>	assertNull(q.poll());
476		}
477
478		/**
479	<	* timed pool with zero timeout succeeds when non-empty, else times out
479	>	* timed poll with zero timeout succeeds when non-empty, else times out
480		*/
481	<	public void testTimedPoll0() {
482	<	try {
483	<	ArrayBlockingQueue q = populatedQueue(SIZE);
484	<	for (int i = 0; i < SIZE; ++i) {
485	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
486	<	}
487	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
495	<	} catch (InterruptedException e){
496	<	unexpectedException();
497	<	}
481	>	public void testTimedPoll0() throws InterruptedException {
482	>	ArrayBlockingQueue q = populatedQueue(SIZE);
483	>	for (int i = 0; i < SIZE; ++i) {
484	>	assertEquals(i, q.poll(0, MILLISECONDS));
485	>	}
486	>	assertNull(q.poll(0, MILLISECONDS));
487	>	checkEmpty(q);
488		}
489
490		/**
491	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
491	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
492		*/
493	<	public void testTimedPoll() {
494	<	try {
495	<	ArrayBlockingQueue q = populatedQueue(SIZE);
496	<	for (int i = 0; i < SIZE; ++i) {
497	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
498	<	}
499	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
500	<	} catch (InterruptedException e){
501	<	unexpectedException();
502	<	}
493	>	public void testTimedPoll() throws InterruptedException {
494	>	ArrayBlockingQueue q = populatedQueue(SIZE);
495	>	for (int i = 0; i < SIZE; ++i) {
496	>	long startTime = System.nanoTime();
497	>	assertEquals(i, q.poll(LONG_DELAY_MS, MILLISECONDS));
498	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
499	>	}
500	>	long startTime = System.nanoTime();
501	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
502	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
503	>	checkEmpty(q);
504		}
505
506		/**
507		* Interrupted timed poll throws InterruptedException instead of
508		* returning timeout status
509		*/
510	<	public void testInterruptedTimedPoll() {
511	<	Thread t = new Thread(new Runnable() {
512	<	public void run() {
513	<	try {
514	<	ArrayBlockingQueue q = populatedQueue(SIZE);
515	<	for (int i = 0; i < SIZE; ++i) {
516	<	threadAssertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
517	<	}
527	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
528	<	} catch (InterruptedException success){
529	<	}
530	<	}});
531	<	try {
532	<	t.start();
533	<	Thread.sleep(SHORT_DELAY_MS);
534	<	t.interrupt();
535	<	t.join();
536	<	}
537	<	catch (InterruptedException ie) {
538	<	unexpectedException();
539	<	}
540	<	}
510	>	public void testInterruptedTimedPoll() throws InterruptedException {
511	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
512	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
513	>	Thread t = newStartedThread(new CheckedRunnable() {
514	>	public void realRun() throws InterruptedException {
515	>	long startTime = System.nanoTime();
516	>	for (int i = 0; i < SIZE; i++)
517	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
518
519	<	/**
520	<	*  timed poll before a delayed offer fails; after offer succeeds;
521	<	*  on interruption throws
522	<	*/
523	<	public void testTimedPollWithOffer() {
524	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
548	<	Thread t = new Thread(new Runnable() {
549	<	public void run() {
550	<	try {
551	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
552	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
553	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
554	<	threadShouldThrow();
555	<	} catch (InterruptedException success) { }
556	<	}
557	<	});
558	<	try {
559	<	t.start();
560	<	Thread.sleep(SMALL_DELAY_MS);
561	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
562	<	t.interrupt();
563	<	t.join();
564	<	} catch (Exception e){
565	<	unexpectedException();
566	<	}
567	<	}
519	>	Thread.currentThread().interrupt();
520	>	try {
521	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
522	>	shouldThrow();
523	>	} catch (InterruptedException success) {}
524	>	assertFalse(Thread.interrupted());
525
526	+	pleaseInterrupt.countDown();
527	+	try {
528	+	q.poll(LONG_DELAY_MS, MILLISECONDS);
529	+	shouldThrow();
530	+	} catch (InterruptedException success) {}
531	+	assertFalse(Thread.interrupted());
532	+
533	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
534	+	}});
535	+
536	+	await(pleaseInterrupt);
537	+	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
538	+	t.interrupt();
539	+	awaitTermination(t);
540	+	checkEmpty(q);
541	+	}
542
543		/**
544		* peek returns next element, or null if empty
#	Line 573 | Line 546 | public class ArrayBlockingQueueTest exte
546		public void testPeek() {
547		ArrayBlockingQueue q = populatedQueue(SIZE);
548		for (int i = 0; i < SIZE; ++i) {
549	<	assertEquals(i, ((Integer)q.peek()).intValue());
550	<	q.poll();
549	>	assertEquals(i, q.peek());
550	>	assertEquals(i, q.poll());
551		assertTrue(q.peek() == null ||
552	<	i != ((Integer)q.peek()).intValue());
552	>	!q.peek().equals(i));
553		}
554	<	assertNull(q.peek());
554	>	assertNull(q.peek());
555		}
556
557		/**
#	Line 587 | Line 560 | public class ArrayBlockingQueueTest exte
560		public void testElement() {
561		ArrayBlockingQueue q = populatedQueue(SIZE);
562		for (int i = 0; i < SIZE; ++i) {
563	<	assertEquals(i, ((Integer)q.element()).intValue());
564	<	q.poll();
563	>	assertEquals(i, q.element());
564	>	assertEquals(i, q.poll());
565		}
566		try {
567		q.element();
568		shouldThrow();
569	<	}
597	<	catch (NoSuchElementException success) {}
569	>	} catch (NoSuchElementException success) {}
570		}
571
572		/**
#	Line 603 | Line 575 | public class ArrayBlockingQueueTest exte
575		public void testRemove() {
576		ArrayBlockingQueue q = populatedQueue(SIZE);
577		for (int i = 0; i < SIZE; ++i) {
578	<	assertEquals(i, ((Integer)q.remove()).intValue());
578	>	assertEquals(i, q.remove());
579		}
580		try {
581		q.remove();
582		shouldThrow();
583	<	} catch (NoSuchElementException success){
612	<	}
583	>	} catch (NoSuchElementException success) {}
584		}
585
586		/**
616	–	* remove(x) removes x and returns true if present
617	–	*/
618	–	public void testRemoveElement() {
619	–	ArrayBlockingQueue q = populatedQueue(SIZE);
620	–	for (int i = 1; i < SIZE; i+=2) {
621	–	assertTrue(q.remove(new Integer(i)));
622	–	}
623	–	for (int i = 0; i < SIZE; i+=2) {
624	–	assertTrue(q.remove(new Integer(i)));
625	–	assertFalse(q.remove(new Integer(i+1)));
626	–	}
627	–	assertTrue(q.isEmpty());
628	–	}
629	–
630	–	/**
587		* contains(x) reports true when elements added but not yet removed
588		*/
589		public void testContains() {
590	<	ArrayBlockingQueue q = populatedQueue(SIZE);
591	<	for (int i = 0; i < SIZE; ++i) {
590	>	int size = ThreadLocalRandom.current().nextInt(1, SIZE);
591	>	ArrayBlockingQueue q = populatedQueue(size, size, 2 * size, false);
592	>	assertFalse(q.contains(null));
593	>	for (int i = 0; i < size; ++i) {
594		assertTrue(q.contains(new Integer(i)));
595	<	q.poll();
595	>	assertEquals(i, q.poll());
596		assertFalse(q.contains(new Integer(i)));
597		}
598		}
#	Line 643 | Line 601 | public class ArrayBlockingQueueTest exte
601		* clear removes all elements
602		*/
603		public void testClear() {
604	<	ArrayBlockingQueue q = populatedQueue(SIZE);
604	>	int size = ThreadLocalRandom.current().nextInt(1, 5);
605	>	ArrayBlockingQueue q = populatedQueue(size, size, 2 * size, false);
606	>	int capacity = size + q.remainingCapacity();
607		q.clear();
608		assertTrue(q.isEmpty());
609		assertEquals(0, q.size());
610	<	assertEquals(SIZE, q.remainingCapacity());
610	>	assertEquals(capacity, q.remainingCapacity());
611		q.add(one);
612		assertFalse(q.isEmpty());
613	+	assertTrue(q.contains(one));
614		q.clear();
615		assertTrue(q.isEmpty());
616		}
#	Line 682 | Line 643 | public class ArrayBlockingQueueTest exte
643		assertTrue(changed);
644
645		assertTrue(q.containsAll(p));
646	<	assertEquals(SIZE-i, q.size());
646	>	assertEquals(SIZE - i, q.size());
647		p.remove();
648		}
649		}
#	Line 695 | Line 656 | public class ArrayBlockingQueueTest exte
656		ArrayBlockingQueue q = populatedQueue(SIZE);
657		ArrayBlockingQueue p = populatedQueue(i);
658		assertTrue(q.removeAll(p));
659	<	assertEquals(SIZE-i, q.size());
659	>	assertEquals(SIZE - i, q.size());
660		for (int j = 0; j < i; ++j) {
661	<	Integer I = (Integer)(p.remove());
662	<	assertFalse(q.contains(I));
661	>	Integer x = (Integer)(p.remove());
662	>	assertFalse(q.contains(x));
663		}
664		}
665		}
666
667	+	void checkToArray(ArrayBlockingQueue<Integer> q) {
668	+	int size = q.size();
669	+	Object[] a1 = q.toArray();
670	+	assertEquals(size, a1.length);
671	+	Integer[] a2 = q.toArray(new Integer[0]);
672	+	assertEquals(size, a2.length);
673	+	Integer[] a3 = q.toArray(new Integer[Math.max(0, size - 1)]);
674	+	assertEquals(size, a3.length);
675	+	Integer[] a4 = new Integer[size];
676	+	assertSame(a4, q.toArray(a4));
677	+	Integer[] a5 = new Integer[size + 1];
678	+	Arrays.fill(a5, 42);
679	+	assertSame(a5, q.toArray(a5));
680	+	Integer[] a6 = new Integer[size + 2];
681	+	Arrays.fill(a6, 42);
682	+	assertSame(a6, q.toArray(a6));
683	+	Object[][] as = { a1, a2, a3, a4, a5, a6 };
684	+	for (Object[] a : as) {
685	+	if (a.length > size) assertNull(a[size]);
686	+	if (a.length > size + 1) assertEquals(42, a[size + 1]);
687	+	}
688	+	Iterator it = q.iterator();
689	+	Integer s = q.peek();
690	+	for (int i = 0; i < size; i++) {
691	+	Integer x = (Integer) it.next();
692	+	assertEquals(s + i, (int) x);
693	+	for (Object[] a : as)
694	+	assertSame(a1[i], x);
695	+	}
696	+	}
697	+
698		/**
699	<	*  toArray contains all elements
699	>	* toArray() and toArray(a) contain all elements in FIFO order
700		*/
701		public void testToArray() {
702	<	ArrayBlockingQueue q = populatedQueue(SIZE);
703	<	Object[] o = q.toArray();
704	<	try {
705	<	for(int i = 0; i < o.length; i++)
706	<	assertEquals(o[i], q.take());
707	<	} catch (InterruptedException e){
708	<	unexpectedException();
709	<	}
702	>	final ThreadLocalRandom rnd = ThreadLocalRandom.current();
703	>	final int size = rnd.nextInt(6);
704	>	final int capacity = Math.max(1, size + rnd.nextInt(size + 1));
705	>	ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<>(capacity);
706	>	for (int i = 0; i < size; i++) {
707	>	checkToArray(q);
708	>	q.add(i);
709	>	}
710	>	// Provoke wraparound
711	>	int added = size * 2;
712	>	for (int i = 0; i < added; i++) {
713	>	checkToArray(q);
714	>	assertEquals((Integer) i, q.poll());
715	>	q.add(size + i);
716	>	}
717	>	for (int i = 0; i < size; i++) {
718	>	checkToArray(q);
719	>	assertEquals((Integer) (added + i), q.poll());
720	>	}
721		}
722
723		/**
724	<	* toArray(a) contains all elements
724	>	* toArray(incompatible array type) throws ArrayStoreException
725		*/
726	<	public void testToArray2() {
726	>	public void testToArray_incompatibleArrayType() {
727		ArrayBlockingQueue q = populatedQueue(SIZE);
728	<	Integer[] ints = new Integer[SIZE];
729	<	ints = (Integer[])q.toArray(ints);
730	<	try {
731	<	for(int i = 0; i < ints.length; i++)
732	<	assertEquals(ints[i], q.take());
733	<	} catch (InterruptedException e){
734	<	unexpectedException();
735	<	}
728	>	try {
729	>	q.toArray(new String[10]);
730	>	shouldThrow();
731	>	} catch (ArrayStoreException success) {}
732	>	try {
733	>	q.toArray(new String[0]);
734	>	shouldThrow();
735	>	} catch (ArrayStoreException success) {}
736		}
737
738		/**
739	<	* toArray(null) throws NPE
739	>	* iterator iterates through all elements
740		*/
741	<	public void testToArray_BadArg() {
742	<	try {
743	<	ArrayBlockingQueue q = populatedQueue(SIZE);
744	<	Object o[] = q.toArray(null);
745	<	shouldThrow();
746	<	} catch(NullPointerException success){}
747	<	}
741	>	public void testIterator() throws InterruptedException {
742	>	ArrayBlockingQueue q = populatedQueue(SIZE);
743	>	Iterator it = q.iterator();
744	>	int i;
745	>	for (i = 0; it.hasNext(); i++)
746	>	assertTrue(q.contains(it.next()));
747	>	assertEquals(i, SIZE);
748	>	assertIteratorExhausted(it);
749
750	<	/**
751	<	* toArray with incompatible array type throws CCE
752	<	*/
753	<	public void testToArray1_BadArg() {
754	<	try {
751	<	ArrayBlockingQueue q = populatedQueue(SIZE);
752	<	Object o[] = q.toArray(new String[10] );
753	<	shouldThrow();
754	<	} catch(ArrayStoreException  success){}
750	>	it = q.iterator();
751	>	for (i = 0; it.hasNext(); i++)
752	>	assertEquals(it.next(), q.take());
753	>	assertEquals(i, SIZE);
754	>	assertIteratorExhausted(it);
755		}
756
757	–
757		/**
758	<	* iterator iterates through all elements
758	>	* iterator of empty collection has no elements
759		*/
760	<	public void testIterator() {
761	<	ArrayBlockingQueue q = populatedQueue(SIZE);
763	<	Iterator it = q.iterator();
764	<	try {
765	<	while(it.hasNext()){
766	<	assertEquals(it.next(), q.take());
767	<	}
768	<	} catch (InterruptedException e){
769	<	unexpectedException();
770	<	}
760	>	public void testEmptyIterator() {
761	>	assertIteratorExhausted(new ArrayBlockingQueue(SIZE).iterator());
762		}
763
764		/**
765		* iterator.remove removes current element
766		*/
767	<	public void testIteratorRemove () {
767	>	public void testIteratorRemove() {
768		final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
769		q.add(two);
770		q.add(one);
#	Line 782 | Line 773 | public class ArrayBlockingQueueTest exte
773		Iterator it = q.iterator();
774		it.next();
775		it.remove();
776	<
776	>
777		it = q.iterator();
778	<	assertEquals(it.next(), one);
779	<	assertEquals(it.next(), three);
778	>	assertSame(it.next(), one);
779	>	assertSame(it.next(), three);
780		assertFalse(it.hasNext());
781		}
782
#	Line 802 | Line 793 | public class ArrayBlockingQueueTest exte
793
794		int k = 0;
795		for (Iterator it = q.iterator(); it.hasNext();) {
796	<	int i = ((Integer)(it.next())).intValue();
806	<	assertEquals(++k, i);
796	>	assertEquals(++k, it.next());
797		}
798		assertEquals(3, k);
799		}
#	Line 811 | Line 801 | public class ArrayBlockingQueueTest exte
801		/**
802		* Modifications do not cause iterators to fail
803		*/
804	<	public void testWeaklyConsistentIteration () {
804	>	public void testWeaklyConsistentIteration() {
805		final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
806		q.add(one);
807		q.add(two);
808		q.add(three);
809	<	try {
810	<	for (Iterator it = q.iterator(); it.hasNext();) {
811	<	q.remove();
822	<	it.next();
823	<	}
824	<	}
825	<	catch (ConcurrentModificationException e) {
826	<	unexpectedException();
809	>	for (Iterator it = q.iterator(); it.hasNext();) {
810	>	q.remove();
811	>	it.next();
812		}
813		assertEquals(0, q.size());
814		}
815
831	–
816		/**
817		* toString contains toStrings of elements
818		*/
#	Line 836 | Line 820 | public class ArrayBlockingQueueTest exte
820		ArrayBlockingQueue q = populatedQueue(SIZE);
821		String s = q.toString();
822		for (int i = 0; i < SIZE; ++i) {
823	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
823	>	assertTrue(s.contains(String.valueOf(i)));
824		}
825	<	}
842	<
825	>	}
826
827		/**
828		* offer transfers elements across Executor tasks
#	Line 848 | Line 831 | public class ArrayBlockingQueueTest exte
831		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
832		q.add(one);
833		q.add(two);
834	<	ExecutorService executor = Executors.newFixedThreadPool(2);
835	<	executor.execute(new Runnable() {
836	<	public void run() {
837	<	threadAssertFalse(q.offer(three));
838	<	try {
839	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
840	<	threadAssertEquals(0, q.remainingCapacity());
841	<	}
842	<	catch (InterruptedException e) {
843	<	threadUnexpectedException();
861	<	}
862	<	}
863	<	});
864	<
865	<	executor.execute(new Runnable() {
866	<	public void run() {
867	<	try {
868	<	Thread.sleep(SMALL_DELAY_MS);
869	<	threadAssertEquals(one, q.take());
870	<	}
871	<	catch (InterruptedException e) {
872	<	threadUnexpectedException();
873	<	}
874	<	}
875	<	});
876	<
877	<	joinPool(executor);
834	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
835	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
836	>	try (PoolCleaner cleaner = cleaner(executor)) {
837	>	executor.execute(new CheckedRunnable() {
838	>	public void realRun() throws InterruptedException {
839	>	assertFalse(q.offer(three));
840	>	threadsStarted.await();
841	>	assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS));
842	>	assertEquals(0, q.remainingCapacity());
843	>	}});
844
845	+	executor.execute(new CheckedRunnable() {
846	+	public void realRun() throws InterruptedException {
847	+	threadsStarted.await();
848	+	assertEquals(0, q.remainingCapacity());
849	+	assertSame(one, q.take());
850	+	}});
851	+	}
852		}
853
854		/**
855	<	* poll retrieves elements across Executor threads
855	>	* timed poll retrieves elements across Executor threads
856		*/
857		public void testPollInExecutor() {
858		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
859	<	ExecutorService executor = Executors.newFixedThreadPool(2);
860	<	executor.execute(new Runnable() {
861	<	public void run() {
862	<	threadAssertNull(q.poll());
863	<	try {
864	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
865	<	threadAssertTrue(q.isEmpty());
866	<	}
867	<	catch (InterruptedException e) {
868	<	threadUnexpectedException();
896	<	}
897	<	}
898	<	});
859	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
860	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
861	>	try (PoolCleaner cleaner = cleaner(executor)) {
862	>	executor.execute(new CheckedRunnable() {
863	>	public void realRun() throws InterruptedException {
864	>	assertNull(q.poll());
865	>	threadsStarted.await();
866	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
867	>	checkEmpty(q);
868	>	}});
869
870	<	executor.execute(new Runnable() {
871	<	public void run() {
872	<	try {
903	<	Thread.sleep(SMALL_DELAY_MS);
870	>	executor.execute(new CheckedRunnable() {
871	>	public void realRun() throws InterruptedException {
872	>	threadsStarted.await();
873		q.put(one);
874	<	}
875	<	catch (InterruptedException e) {
907	<	threadUnexpectedException();
908	<	}
909	<	}
910	<	});
911	<
912	<	joinPool(executor);
874	>	}});
875	>	}
876		}
877
878		/**
879		* A deserialized serialized queue has same elements in same order
880		*/
881	<	public void testSerialization() {
882	<	ArrayBlockingQueue q = populatedQueue(SIZE);
883	<
884	<	try {
885	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
886	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
887	<	out.writeObject(q);
888	<	out.close();
889	<
890	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
891	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
929	<	ArrayBlockingQueue r = (ArrayBlockingQueue)in.readObject();
930	<	assertEquals(q.size(), r.size());
931	<	while (!q.isEmpty())
932	<	assertEquals(q.remove(), r.remove());
933	<	} catch(Exception e){
934	<	unexpectedException();
935	<	}
936	<	}
937	<
938	<	/**
939	<	* drainTo(null) throws NPE
940	<	*/
941	<	public void testDrainToNull() {
942	<	ArrayBlockingQueue q = populatedQueue(SIZE);
943	<	try {
944	<	q.drainTo(null);
945	<	shouldThrow();
946	<	} catch(NullPointerException success) {
947	<	}
948	<	}
949	<
950	<	/**
951	<	* drainTo(this) throws IAE
952	<	*/
953	<	public void testDrainToSelf() {
954	<	ArrayBlockingQueue q = populatedQueue(SIZE);
955	<	try {
956	<	q.drainTo(q);
957	<	shouldThrow();
958	<	} catch(IllegalArgumentException success) {
881	>	public void testSerialization() throws Exception {
882	>	Queue x = populatedQueue(SIZE);
883	>	Queue y = serialClone(x);
884	>
885	>	assertNotSame(x, y);
886	>	assertEquals(x.size(), y.size());
887	>	assertEquals(x.toString(), y.toString());
888	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
889	>	while (!x.isEmpty()) {
890	>	assertFalse(y.isEmpty());
891	>	assertEquals(x.remove(), y.remove());
892		}
893	+	assertTrue(y.isEmpty());
894		}
895
896		/**
897		* drainTo(c) empties queue into another collection c
898	<	*/
898	>	*/
899		public void testDrainTo() {
900		ArrayBlockingQueue q = populatedQueue(SIZE);
901		ArrayList l = new ArrayList();
902		q.drainTo(l);
903	<	assertEquals(q.size(), 0);
904	<	assertEquals(l.size(), SIZE);
905	<	for (int i = 0; i < SIZE; ++i)
903	>	assertEquals(0, q.size());
904	>	assertEquals(SIZE, l.size());
905	>	for (int i = 0; i < SIZE; ++i)
906	>	assertEquals(l.get(i), new Integer(i));
907	>	q.add(zero);
908	>	q.add(one);
909	>	assertFalse(q.isEmpty());
910	>	assertTrue(q.contains(zero));
911	>	assertTrue(q.contains(one));
912	>	l.clear();
913	>	q.drainTo(l);
914	>	assertEquals(0, q.size());
915	>	assertEquals(2, l.size());
916	>	for (int i = 0; i < 2; ++i)
917		assertEquals(l.get(i), new Integer(i));
918		}
919
920		/**
921		* drainTo empties full queue, unblocking a waiting put.
922	<	*/
923	<	public void testDrainToWithActivePut() {
922	>	*/
923	>	public void testDrainToWithActivePut() throws InterruptedException {
924		final ArrayBlockingQueue q = populatedQueue(SIZE);
925	<	Thread t = new Thread(new Runnable() {
926	<	public void run() {
927	<	try {
928	<	q.put(new Integer(SIZE+1));
984	<	} catch (InterruptedException ie){
985	<	threadUnexpectedException();
986	<	}
987	<	}
988	<	});
989	<	try {
990	<	t.start();
991	<	ArrayList l = new ArrayList();
992	<	q.drainTo(l);
993	<	assertTrue(l.size() >= SIZE);
994	<	for (int i = 0; i < SIZE; ++i)
995	<	assertEquals(l.get(i), new Integer(i));
996	<	t.join();
997	<	assertTrue(q.size() + l.size() >= SIZE);
998	<	} catch(Exception e){
999	<	unexpectedException();
1000	<	}
1001	<	}
925	>	Thread t = new Thread(new CheckedRunnable() {
926	>	public void realRun() throws InterruptedException {
927	>	q.put(new Integer(SIZE + 1));
928	>	}});
929
930	<	/**
931	<	* drainTo(null, n) throws NPE
932	<	*/
933	<	public void testDrainToNullN() {
934	<	ArrayBlockingQueue q = populatedQueue(SIZE);
935	<	try {
936	<	q.drainTo(null, 0);
937	<	shouldThrow();
1011	<	} catch(NullPointerException success) {
1012	<	}
1013	<	}
1014	<
1015	<	/**
1016	<	* drainTo(this, n) throws IAE
1017	<	*/
1018	<	public void testDrainToSelfN() {
1019	<	ArrayBlockingQueue q = populatedQueue(SIZE);
1020	<	try {
1021	<	q.drainTo(q, 0);
1022	<	shouldThrow();
1023	<	} catch(IllegalArgumentException success) {
1024	<	}
930	>	t.start();
931	>	ArrayList l = new ArrayList();
932	>	q.drainTo(l);
933	>	assertTrue(l.size() >= SIZE);
934	>	for (int i = 0; i < SIZE; ++i)
935	>	assertEquals(l.get(i), new Integer(i));
936	>	t.join();
937	>	assertTrue(q.size() + l.size() >= SIZE);
938		}
939
940		/**
941	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
942	<	*/
941	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
942	>	*/
943		public void testDrainToN() {
944	+	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE * 2);
945		for (int i = 0; i < SIZE + 2; ++i) {
946	<	ArrayBlockingQueue q = populatedQueue(SIZE);
946	>	for (int j = 0; j < SIZE; j++)
947	>	assertTrue(q.offer(new Integer(j)));
948		ArrayList l = new ArrayList();
949		q.drainTo(l, i);
950	<	int k = (i < SIZE)? i : SIZE;
951	<	assertEquals(q.size(), SIZE-k);
952	<	assertEquals(l.size(), k);
953	<	for (int j = 0; j < k; ++j)
950	>	int k = (i < SIZE) ? i : SIZE;
951	>	assertEquals(k, l.size());
952	>	assertEquals(SIZE - k, q.size());
953	>	for (int j = 0; j < k; ++j)
954		assertEquals(l.get(j), new Integer(j));
955	+	do {} while (q.poll() != null);
956		}
957		}
958
959	+	/**
960	+	* remove(null), contains(null) always return false
961	+	*/
962	+	public void testNeverContainsNull() {
963	+	Collection<?>[] qs = {
964	+	populatedQueue(0, 1, 10, false),
965	+	populatedQueue(2, 2, 10, true),
966	+	};
967
968	+	for (Collection<?> q : qs) {
969	+	assertFalse(q.contains(null));
970	+	assertFalse(q.remove(null));
971	+	}
972	+	}
973		}

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