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

Comparing jsr166/src/test/tck/ArrayBlockingQueueTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.87 by jsr166, Sun May 14 00:56:43 2017 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
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/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
10	<	import java.util.*;
11	<	import java.util.concurrent.*;
12	<	import java.io.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	>
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	<
98	<	public void testConstructor1(){
97	>
98	>	/**
99	>	* A new queue has the indicated capacity
100	>	*/
101	>	public void testConstructor1() {
102		assertEquals(SIZE, new ArrayBlockingQueue(SIZE).remainingCapacity());
103		}
104
105	<	public void testConstructor2(){
106	<	try {
107	<	ArrayBlockingQueue q = new ArrayBlockingQueue(0);
108	<	fail("Cannot make zero-sized");
105	>	/**
106	>	* Constructor throws IAE if capacity argument nonpositive
107	>	*/
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		}
47	–	catch (IllegalArgumentException success) {}
121		}
122
123	<	public void testConstructor3(){
124	<
123	>	/**
124	>	* Initializing from null Collection throws NPE
125	>	*/
126	>	public void testConstructor_nullCollection() {
127		try {
128	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1, true, null);
129	<	fail("Cannot make from null collection");
130	<	}
56	<	catch (NullPointerException success) {}
128	>	new ArrayBlockingQueue(1, true, null);
129	>	shouldThrow();
130	>	} catch (NullPointerException success) {}
131		}
132
133	<	public void testConstructor4(){
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];
140	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
141	<	fail("Cannot make with null elements");
64	<	}
65	<	catch (NullPointerException success) {}
139	>	new ArrayBlockingQueue(SIZE, false, elements);
140	>	shouldThrow();
141	>	} catch (NullPointerException success) {}
142		}
143
144	<	public void testConstructor5(){
145	<	try {
146	<	Integer[] ints = new Integer[SIZE];
147	<	for (int i = 0; i < SIZE-1; ++i)
148	<	ints[i] = new Integer(i);
149	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
150	<	fail("Cannot make with null elements");
151	<	}
152	<	catch (NullPointerException success) {}
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	>	new ArrayBlockingQueue(SIZE, false, elements);
154	>	shouldThrow();
155	>	} catch (NullPointerException success) {}
156		}
157
158	<	public void testConstructor6(){
159	<	try {
160	<	Integer[] ints = new Integer[SIZE];
161	<	for (int i = 0; i < SIZE; ++i)
162	<	ints[i] = new Integer(i);
163	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1, false, Arrays.asList(ints));
164	<	fail("Cannot make with insufficient capacity");
165	<	}
166	<	catch (IllegalArgumentException success) {}
158	>	/**
159	>	* Initializing from too large collection throws IAE
160	>	*/
161	>	public void testConstructor_collectionTooLarge() {
162	>	// just barely fits - succeeds
163	>	new ArrayBlockingQueue(SIZE, false,
164	>	Collections.nCopies(SIZE, ""));
165	>	try {
166	>	new ArrayBlockingQueue(SIZE - 1, false,
167	>	Collections.nCopies(SIZE, ""));
168	>	shouldThrow();
169	>	} catch (IllegalArgumentException success) {}
170		}
171
172	<	public void testConstructor7(){
173	<	try {
174	<	Integer[] ints = new Integer[SIZE];
175	<	for (int i = 0; i < SIZE; ++i)
176	<	ints[i] = new Integer(i);
177	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, true, Arrays.asList(ints));
178	<	for (int i = 0; i < SIZE; ++i)
179	<	assertEquals(ints[i], q.poll());
180	<	}
181	<	finally {}
172	>	/**
173	>	* Queue contains all elements of collection used to initialize
174	>	*/
175	>	public void testConstructor7() {
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("should have room for 2", 2, q.remainingCapacity());
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("queue should be full", 0, q.remainingCapacity());
197	<	assertFalse("offer should be rejected", q.offer(three));
196	>	assertEquals(0, q.remainingCapacity());
197	>	assertFalse(q.offer(three));
198		}
199
200	<	public void testRemainingCapacity(){
201	<	ArrayBlockingQueue q = populatedQueue(SIZE);
202	<	for (int i = 0; i < SIZE; ++i) {
203	<	assertEquals(i, q.remainingCapacity());
204	<	assertEquals(SIZE-i, q.size());
205	<	q.remove();
206	<	}
207	<	for (int i = 0; i < SIZE; ++i) {
208	<	assertEquals(SIZE-i, q.remainingCapacity());
209	<	assertEquals(i, q.size());
210	<	q.add(new Integer(i));
200	>	/**
201	>	* remainingCapacity decreases on add, increases on remove
202	>	*/
203	>	public void testRemainingCapacity() {
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	<	public void testOfferNull(){
221	<	try {
222	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
223	<	q.offer(null);
132	<	fail("should throw NPE");
133	<	} catch (NullPointerException success) { }
134	<	}
135	<
136	<	public void testOffer(){
220	>	/**
221	>	* Offer succeeds if not full; fails if full
222	>	*/
223	>	public void testOffer() {
224		ArrayBlockingQueue q = new ArrayBlockingQueue(1);
225		assertTrue(q.offer(zero));
226		assertFalse(q.offer(one));
227		}
228
229	<	public void testAdd(){
230	<	try {
231	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
232	<	for (int i = 0; i < SIZE; ++i) {
233	<	assertTrue(q.add(new Integer(i)));
234	<	}
235	<	assertEquals(0, q.remainingCapacity());
149	<	q.add(new Integer(SIZE));
150	<	} catch (IllegalStateException success){
151	<	}
152	<	}
153	<
154	<	public void testAddAll1(){
155	<	try {
156	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
157	<	q.addAll(null);
158	<	fail("Cannot add null collection");
159	<	}
160	<	catch (NullPointerException success) {}
161	<	}
162	<	public void testAddAll2(){
229	>	/**
230	>	* add succeeds if not full; throws ISE if full
231	>	*/
232	>	public void testAdd() {
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(SIZE);
238	<	Integer[] ints = new Integer[SIZE];
239	<	q.addAll(Arrays.asList(ints));
167	<	fail("Cannot add null elements");
168	<	}
169	<	catch (NullPointerException success) {}
237	>	q.add((Integer) SIZE);
238	>	shouldThrow();
239	>	} catch (IllegalStateException success) {}
240		}
241	<	public void testAddAll3(){
241	>
242	>	/**
243	>	* addAll(this) throws IAE
244	>	*/
245	>	public void testAddAllSelf() {
246	>	ArrayBlockingQueue q = populatedQueue(SIZE);
247		try {
248	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
249	<	Integer[] ints = new Integer[SIZE];
250	<	for (int i = 0; i < SIZE-1; ++i)
176	<	ints[i] = new Integer(i);
177	<	q.addAll(Arrays.asList(ints));
178	<	fail("Cannot add null elements");
179	<	}
180	<	catch (NullPointerException success) {}
248	>	q.addAll(q);
249	>	shouldThrow();
250	>	} catch (IllegalArgumentException success) {}
251		}
252	<	public void testAddAll4(){
252	>
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 {
184	–	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
185	–	Integer[] ints = new Integer[SIZE];
186	–	for (int i = 0; i < SIZE; ++i)
187	–	ints[i] = new Integer(i);
263		q.addAll(Arrays.asList(ints));
264	<	fail("Cannot add with insufficient capacity");
265	<	}
191	<	catch (IllegalStateException success) {}
264	>	shouldThrow();
265	>	} catch (NullPointerException success) {}
266		}
267	<	public void testAddAll5(){
267	>
268	>	/**
269	>	* addAll throws ISE if not enough room
270	>	*/
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	<	Integer[] empty = new Integer[0];
281	<	Integer[] ints = new Integer[SIZE];
282	<	for (int i = 0; i < SIZE; ++i)
283	<	ints[i] = new Integer(i);
199	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
200	<	assertFalse(q.addAll(Arrays.asList(empty)));
201	<	assertTrue(q.addAll(Arrays.asList(ints)));
202	<	for (int i = 0; i < SIZE; ++i)
203	<	assertEquals(ints[i], q.poll());
204	<	}
205	<	finally {}
206	<	}
207	<
208	<	public void testPutNull() {
209	<	try {
210	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
211	<	q.put(null);
212	<	fail("put should throw NPE");
213	<	}
214	<	catch (NullPointerException success){
215	<	}
216	<	catch (InterruptedException ie) {
217	<	fail("Unexpected exception");
218	<	}
219	<	}
220	<
221	<	public void testPut() {
222	<	try {
223	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
224	<	for (int i = 0; i < SIZE; ++i) {
225	<	Integer I = new Integer(i);
226	<	q.put(I);
227	<	assertTrue(q.contains(I));
228	<	}
229	<	assertEquals(0, q.remainingCapacity());
230	<	}
231	<	catch (InterruptedException ie) {
232	<	fail("Unexpected exception");
233	<	}
280	>	q = populatedQueue(0, size, size, false);
281	>	q.addAll(Collections.nCopies(size + 1, 42));
282	>	shouldThrow();
283	>	} catch (IllegalStateException success) {}
284		}
285
286	<	public void testBlockingPut(){
287	<	Thread t = new Thread(new Runnable() {
288	<	public void run() {
289	<	int added = 0;
290	<	try {
291	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
292	<	for (int i = 0; i < SIZE; ++i) {
293	<	q.put(new Integer(i));
294	<	++added;
295	<	}
296	<	q.put(new Integer(SIZE));
297	<	threadFail("put should block");
298	<	} catch (InterruptedException ie){
249	<	threadAssertEquals(added, SIZE);
250	<	}
251	<	}});
252	<	try {
253	<	t.start();
254	<	Thread.sleep(SHORT_DELAY_MS);
255	<	t.interrupt();
256	<	t.join();
257	<	}
258	<	catch (InterruptedException ie) {
259	<	fail("Unexpected exception");
260	<	}
286	>	/**
287	>	* Queue contains all elements, in traversal order, of successful addAll
288	>	*/
289	>	public void testAddAll5() {
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	<	public void testPutWithTake() {
302	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
303	<	Thread t = new Thread(new Runnable() {
304	<	public void run(){
305	<	int added = 0;
306	<	try {
307	<	q.put(new Object());
308	<	++added;
309	<	q.put(new Object());
272	<	++added;
273	<	q.put(new Object());
274	<	++added;
275	<	q.put(new Object());
276	<	++added;
277	<	threadFail("Should block");
278	<	} catch (InterruptedException e){
279	<	threadAssertTrue(added >= 2);
280	<	}
281	<	}
282	<	});
283	<	try {
284	<	t.start();
285	<	Thread.sleep(SHORT_DELAY_MS);
286	<	q.take();
287	<	t.interrupt();
288	<	t.join();
289	<	} catch (Exception e){
290	<	fail("Unexpected exception");
301	>	/**
302	>	* all elements successfully put are contained
303	>	*/
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	<	public void testTimedOffer() {
315	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
316	<	Thread t = new Thread(new Runnable() {
317	<	public void run(){
318	<	try {
319	<	q.put(new Object());
320	<	q.put(new Object());
321	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
322	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
323	<	threadFail("Should block");
324	<	} catch (InterruptedException success){}
325	<	}
326	<	});
327	<
328	<	try {
329	<	t.start();
330	<	Thread.sleep(SHORT_DELAY_MS);
331	<	t.interrupt();
332	<	t.join();
333	<	} catch (Exception e){
334	<	fail("Unexpected exception");
335	<	}
314	>	/**
315	>	* put blocks interruptibly if full
316	>	*/
317	>	public void testBlockingPut() throws InterruptedException {
318	>	final ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
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	<	public void testTake(){
351	<	try {
352	<	ArrayBlockingQueue q = populatedQueue(SIZE);
353	<	for (int i = 0; i < SIZE; ++i) {
354	<	assertEquals(i, ((Integer)q.take()).intValue());
355	<	}
356	<	} catch (InterruptedException e){
357	<	fail("Unexpected exception");
358	<	}
350	>	/**
351	>	* put blocks interruptibly waiting for take when full
352	>	*/
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	>	pleaseInterrupt.countDown();
366	>	try {
367	>	q.put(99);
368	>	shouldThrow();
369	>	} catch (InterruptedException success) {}
370	>	assertFalse(Thread.interrupted());
371	>	}});
372	>
373	>	await(pleaseTake);
374	>	assertEquals(0, q.remainingCapacity());
375	>	assertEquals(0, q.take());
376	>
377	>	await(pleaseInterrupt);
378	>	assertThreadBlocks(t, Thread.State.WAITING);
379	>	t.interrupt();
380	>	awaitTermination(t);
381	>	assertEquals(0, q.remainingCapacity());
382		}
383
384	<	public void testTakeFromEmpty() {
384	>	/**
385	>	* timed offer times out if full and elements not taken
386	>	*/
387	>	public void testTimedOffer() throws InterruptedException {
388		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
389	<	Thread t = new Thread(new Runnable() {
390	<	public void run(){
391	<	try {
392	<	q.take();
393	<	threadFail("Should block");
394	<	} catch (InterruptedException success){ }
395	<	}
396	<	});
397	<	try {
398	<	t.start();
399	<	Thread.sleep(SHORT_DELAY_MS);
400	<	t.interrupt();
401	<	t.join();
402	<	} catch (Exception e){
403	<	fail("Unexpected exception");
404	<	}
389	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
390	>	Thread t = newStartedThread(new CheckedRunnable() {
391	>	public void realRun() throws InterruptedException {
392	>	q.put(new Object());
393	>	q.put(new Object());
394	>	long startTime = System.nanoTime();
395	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
396	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
397	>	pleaseInterrupt.countDown();
398	>	try {
399	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
400	>	shouldThrow();
401	>	} catch (InterruptedException success) {}
402	>	assertFalse(Thread.interrupted());
403	>	}});
404	>
405	>	await(pleaseInterrupt);
406	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
407	>	t.interrupt();
408	>	awaitTermination(t);
409		}
410
411	<	public void testBlockingTake(){
412	<	Thread t = new Thread(new Runnable() {
413	<	public void run() {
414	<	try {
415	<	ArrayBlockingQueue q = populatedQueue(SIZE);
416	<	for (int i = 0; i < SIZE; ++i) {
417	<	threadAssertEquals(i, ((Integer)q.take()).intValue());
356	<	}
357	<	q.take();
358	<	threadFail("take should block");
359	<	} catch (InterruptedException success){
360	<	}
361	<	}});
362	<	try {
363	<	t.start();
364	<	Thread.sleep(SHORT_DELAY_MS);
365	<	t.interrupt();
366	<	t.join();
367	<	}
368	<	catch (InterruptedException ie) {
369	<	fail("Unexpected exception");
411	>	/**
412	>	* take retrieves elements in FIFO order
413	>	*/
414	>	public void testTake() throws InterruptedException {
415	>	ArrayBlockingQueue q = populatedQueue(SIZE);
416	>	for (int i = 0; i < SIZE; ++i) {
417	>	assertEquals(i, q.take());
418		}
419		}
420
421	+	/**
422	+	* Take removes existing elements until empty, then blocks interruptibly
423	+	*/
424	+	public void testBlockingTake() throws InterruptedException {
425	+	final ArrayBlockingQueue q = populatedQueue(SIZE);
426	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
427	+	Thread t = newStartedThread(new CheckedRunnable() {
428	+	public void realRun() throws InterruptedException {
429	+	for (int i = 0; i < SIZE; i++) assertEquals(i, q.take());
430	+
431	+	Thread.currentThread().interrupt();
432	+	try {
433	+	q.take();
434	+	shouldThrow();
435	+	} catch (InterruptedException success) {}
436	+	assertFalse(Thread.interrupted());
437
438	<	public void testPoll(){
438	>	pleaseInterrupt.countDown();
439	>	try {
440	>	q.take();
441	>	shouldThrow();
442	>	} catch (InterruptedException success) {}
443	>	assertFalse(Thread.interrupted());
444	>	}});
445	>
446	>	await(pleaseInterrupt);
447	>	assertThreadBlocks(t, Thread.State.WAITING);
448	>	t.interrupt();
449	>	awaitTermination(t);
450	>	}
451	>
452	>	/**
453	>	* poll succeeds unless empty
454	>	*/
455	>	public void testPoll() {
456		ArrayBlockingQueue q = populatedQueue(SIZE);
457		for (int i = 0; i < SIZE; ++i) {
458	<	assertEquals(i, ((Integer)q.poll()).intValue());
458	>	assertEquals(i, q.poll());
459		}
460	<	assertNull(q.poll());
460	>	assertNull(q.poll());
461		}
462
463	<	public void testTimedPoll0() {
464	<	try {
465	<	ArrayBlockingQueue q = populatedQueue(SIZE);
466	<	for (int i = 0; i < SIZE; ++i) {
467	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
468	<	}
469	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
470	<	} catch (InterruptedException e){
471	<	fail("Unexpected exception");
472	<	}
463	>	/**
464	>	* timed poll with zero timeout succeeds when non-empty, else times out
465	>	*/
466	>	public void testTimedPoll0() throws InterruptedException {
467	>	ArrayBlockingQueue q = populatedQueue(SIZE);
468	>	for (int i = 0; i < SIZE; ++i) {
469	>	assertEquals(i, q.poll(0, MILLISECONDS));
470	>	}
471	>	assertNull(q.poll(0, MILLISECONDS));
472	>	checkEmpty(q);
473		}
474
475	<	public void testTimedPoll() {
476	<	try {
477	<	ArrayBlockingQueue q = populatedQueue(SIZE);
478	<	for (int i = 0; i < SIZE; ++i) {
479	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
480	<	}
481	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
482	<	} catch (InterruptedException e){
483	<	fail("Unexpected exception");
484	<	}
485	<	}
486	<
487	<	public void testInterruptedTimedPoll(){
488	<	Thread t = new Thread(new Runnable() {
408	<	public void run() {
409	<	try {
410	<	ArrayBlockingQueue q = populatedQueue(SIZE);
411	<	for (int i = 0; i < SIZE; ++i) {
412	<	threadAssertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
413	<	}
414	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
415	<	} catch (InterruptedException success){
416	<	}
417	<	}});
418	<	try {
419	<	t.start();
420	<	Thread.sleep(SHORT_DELAY_MS);
421	<	t.interrupt();
422	<	t.join();
423	<	}
424	<	catch (InterruptedException ie) {
425	<	fail("Unexpected exception");
426	<	}
475	>	/**
476	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
477	>	*/
478	>	public void testTimedPoll() throws InterruptedException {
479	>	ArrayBlockingQueue q = populatedQueue(SIZE);
480	>	for (int i = 0; i < SIZE; ++i) {
481	>	long startTime = System.nanoTime();
482	>	assertEquals(i, q.poll(LONG_DELAY_MS, MILLISECONDS));
483	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
484	>	}
485	>	long startTime = System.nanoTime();
486	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
487	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
488	>	checkEmpty(q);
489		}
490
491	<	public void testTimedPollWithOffer(){
492	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
493	<	Thread t = new Thread(new Runnable() {
494	<	public void run(){
495	<	try {
496	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
497	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
498	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
499	<	threadFail("Should block");
500	<	} catch (InterruptedException success) { }
491	>	/**
492	>	* Interrupted timed poll throws InterruptedException instead of
493	>	* returning timeout status
494	>	*/
495	>	public void testInterruptedTimedPoll() throws InterruptedException {
496	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
497	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
498	>	Thread t = newStartedThread(new CheckedRunnable() {
499	>	public void realRun() throws InterruptedException {
500	>	long startTime = System.nanoTime();
501	>	for (int i = 0; i < SIZE; ++i) {
502	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
503		}
440	–	});
441	–	try {
442	–	t.start();
443	–	Thread.sleep(SMALL_DELAY_MS);
444	–	assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
445	–	t.interrupt();
446	–	t.join();
447	–	} catch (Exception e){
448	–	fail("Unexpected exception");
449	–	}
450	–	}
504
505	+	pleaseInterrupt.countDown();
506	+	try {
507	+	q.poll(LONG_DELAY_MS, MILLISECONDS);
508	+	shouldThrow();
509	+	} catch (InterruptedException success) {}
510	+	assertFalse(Thread.interrupted());
511	+
512	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
513	+	}});
514	+
515	+	await(pleaseInterrupt);
516	+	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
517	+	t.interrupt();
518	+	awaitTermination(t);
519	+	checkEmpty(q);
520	+	}
521
522	<	public void testPeek(){
522	>	/**
523	>	* peek returns next element, or null if empty
524	>	*/
525	>	public void testPeek() {
526		ArrayBlockingQueue q = populatedQueue(SIZE);
527		for (int i = 0; i < SIZE; ++i) {
528	<	assertEquals(i, ((Integer)q.peek()).intValue());
529	<	q.poll();
528	>	assertEquals(i, q.peek());
529	>	assertEquals(i, q.poll());
530		assertTrue(q.peek() == null ||
531	<	i != ((Integer)q.peek()).intValue());
531	>	!q.peek().equals(i));
532		}
533	<	assertNull(q.peek());
533	>	assertNull(q.peek());
534		}
535
536	<	public void testElement(){
536	>	/**
537	>	* element returns next element, or throws NSEE if empty
538	>	*/
539	>	public void testElement() {
540		ArrayBlockingQueue q = populatedQueue(SIZE);
541		for (int i = 0; i < SIZE; ++i) {
542	<	assertEquals(i, ((Integer)q.element()).intValue());
543	<	q.poll();
542	>	assertEquals(i, q.element());
543	>	assertEquals(i, q.poll());
544		}
545		try {
546		q.element();
547	<	fail("no such element");
548	<	}
474	<	catch (NoSuchElementException success) {}
547	>	shouldThrow();
548	>	} catch (NoSuchElementException success) {}
549		}
550
551	<	public void testRemove(){
551	>	/**
552	>	* remove removes next element, or throws NSEE if empty
553	>	*/
554	>	public void testRemove() {
555		ArrayBlockingQueue q = populatedQueue(SIZE);
556		for (int i = 0; i < SIZE; ++i) {
557	<	assertEquals(i, ((Integer)q.remove()).intValue());
557	>	assertEquals(i, q.remove());
558		}
559		try {
560		q.remove();
561	<	fail("remove should throw");
562	<	} catch (NoSuchElementException success){
486	<	}
561	>	shouldThrow();
562	>	} catch (NoSuchElementException success) {}
563		}
564
565	<	public void testRemoveElement(){
566	<	ArrayBlockingQueue q = populatedQueue(SIZE);
567	<	for (int i = 1; i < SIZE; i+=2) {
568	<	assertTrue(q.remove(new Integer(i)));
569	<	}
570	<	for (int i = 0; i < SIZE; i+=2) {
571	<	assertTrue(q.remove(new Integer(i)));
572	<	assertFalse(q.remove(new Integer(i+1)));
497	<	}
498	<	assertTrue(q.isEmpty());
499	<	}
500	<
501	<	public void testContains(){
502	<	ArrayBlockingQueue q = populatedQueue(SIZE);
503	<	for (int i = 0; i < SIZE; ++i) {
565	>	/**
566	>	* contains(x) reports true when elements added but not yet removed
567	>	*/
568	>	public void testContains() {
569	>	int size = ThreadLocalRandom.current().nextInt(1, SIZE);
570	>	ArrayBlockingQueue q = populatedQueue(size, size, 2 * size, false);
571	>	assertFalse(q.contains(null));
572	>	for (int i = 0; i < size; ++i) {
573		assertTrue(q.contains(new Integer(i)));
574	<	q.poll();
574	>	assertEquals(i, q.poll());
575		assertFalse(q.contains(new Integer(i)));
576		}
577		}
578
579	<	public void testClear(){
580	<	ArrayBlockingQueue q = populatedQueue(SIZE);
579	>	/**
580	>	* clear removes all elements
581	>	*/
582	>	public void testClear() {
583	>	int size = ThreadLocalRandom.current().nextInt(1, 5);
584	>	ArrayBlockingQueue q = populatedQueue(size, size, 2 * size, false);
585	>	int capacity = size + q.remainingCapacity();
586		q.clear();
587		assertTrue(q.isEmpty());
588		assertEquals(0, q.size());
589	<	assertEquals(SIZE, q.remainingCapacity());
589	>	assertEquals(capacity, q.remainingCapacity());
590		q.add(one);
591		assertFalse(q.isEmpty());
592	+	assertTrue(q.contains(one));
593		q.clear();
594		assertTrue(q.isEmpty());
595		}
596
597	<	public void testContainsAll(){
597	>	/**
598	>	* containsAll(c) is true when c contains a subset of elements
599	>	*/
600	>	public void testContainsAll() {
601		ArrayBlockingQueue q = populatedQueue(SIZE);
602		ArrayBlockingQueue p = new ArrayBlockingQueue(SIZE);
603		for (int i = 0; i < SIZE; ++i) {
#	Line 530 | Line 608 | public class ArrayBlockingQueueTest exte
608		assertTrue(p.containsAll(q));
609		}
610
611	<	public void testRetainAll(){
611	>	/**
612	>	* retainAll(c) retains only those elements of c and reports true if changed
613	>	*/
614	>	public void testRetainAll() {
615		ArrayBlockingQueue q = populatedQueue(SIZE);
616		ArrayBlockingQueue p = populatedQueue(SIZE);
617		for (int i = 0; i < SIZE; ++i) {
#	Line 541 | Line 622 | public class ArrayBlockingQueueTest exte
622		assertTrue(changed);
623
624		assertTrue(q.containsAll(p));
625	<	assertEquals(SIZE-i, q.size());
625	>	assertEquals(SIZE - i, q.size());
626		p.remove();
627		}
628		}
629
630	<	public void testRemoveAll(){
630	>	/**
631	>	* removeAll(c) removes only those elements of c and reports true if changed
632	>	*/
633	>	public void testRemoveAll() {
634		for (int i = 1; i < SIZE; ++i) {
635		ArrayBlockingQueue q = populatedQueue(SIZE);
636		ArrayBlockingQueue p = populatedQueue(i);
637		assertTrue(q.removeAll(p));
638	<	assertEquals(SIZE-i, q.size());
638	>	assertEquals(SIZE - i, q.size());
639		for (int j = 0; j < i; ++j) {
640	<	Integer I = (Integer)(p.remove());
641	<	assertFalse(q.contains(I));
640	>	Integer x = (Integer)(p.remove());
641	>	assertFalse(q.contains(x));
642		}
643		}
644		}
645
646	+	void checkToArray(ArrayBlockingQueue<Integer> q) {
647	+	int size = q.size();
648	+	Object[] a1 = q.toArray();
649	+	assertEquals(size, a1.length);
650	+	Integer[] a2 = q.toArray(new Integer[0]);
651	+	assertEquals(size, a2.length);
652	+	Integer[] a3 = q.toArray(new Integer[Math.max(0, size - 1)]);
653	+	assertEquals(size, a3.length);
654	+	Integer[] a4 = new Integer[size];
655	+	assertSame(a4, q.toArray(a4));
656	+	Integer[] a5 = new Integer[size + 1];
657	+	Arrays.fill(a5, 42);
658	+	assertSame(a5, q.toArray(a5));
659	+	Integer[] a6 = new Integer[size + 2];
660	+	Arrays.fill(a6, 42);
661	+	assertSame(a6, q.toArray(a6));
662	+	Object[][] as = { a1, a2, a3, a4, a5, a6 };
663	+	for (Object[] a : as) {
664	+	if (a.length > size) assertNull(a[size]);
665	+	if (a.length > size + 1) assertEquals(42, a[size + 1]);
666	+	}
667	+	Iterator it = q.iterator();
668	+	Integer s = q.peek();
669	+	for (int i = 0; i < size; i++) {
670	+	Integer x = (Integer) it.next();
671	+	assertEquals(s + i, (int) x);
672	+	for (Object[] a : as)
673	+	assertSame(a1[i], x);
674	+	}
675	+	}
676
677	<	public void testToArray(){
677	>	/**
678	>	* toArray() and toArray(a) contain all elements in FIFO order
679	>	*/
680	>	public void testToArray() {
681	>	final ThreadLocalRandom rnd = ThreadLocalRandom.current();
682	>	final int size = rnd.nextInt(6);
683	>	final int capacity = Math.max(1, size + rnd.nextInt(size + 1));
684	>	ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<>(capacity);
685	>	for (int i = 0; i < size; i++) {
686	>	checkToArray(q);
687	>	q.add(i);
688	>	}
689	>	// Provoke wraparound
690	>	int added = size * 2;
691	>	for (int i = 0; i < added; i++) {
692	>	checkToArray(q);
693	>	assertEquals((Integer) i, q.poll());
694	>	q.add(size + i);
695	>	}
696	>	for (int i = 0; i < size; i++) {
697	>	checkToArray(q);
698	>	assertEquals((Integer) (added + i), q.poll());
699	>	}
700	>	}
701	>
702	>	/**
703	>	* toArray(incompatible array type) throws ArrayStoreException
704	>	*/
705	>	public void testToArray_incompatibleArrayType() {
706		ArrayBlockingQueue q = populatedQueue(SIZE);
707	<	Object[] o = q.toArray();
708	<	try {
709	<	for(int i = 0; i < o.length; i++)
710	<	assertEquals(o[i], q.take());
711	<	} catch (InterruptedException e){
712	<	fail("Unexpected exception");
713	<	}
714	<	}
573	<
574	<	public void testToArray2(){
575	<	ArrayBlockingQueue q = populatedQueue(SIZE);
576	<	Integer[] ints = new Integer[SIZE];
577	<	ints = (Integer[])q.toArray(ints);
578	<	try {
579	<	for(int i = 0; i < ints.length; i++)
580	<	assertEquals(ints[i], q.take());
581	<	} catch (InterruptedException e){
582	<	fail("Unexpected exception");
583	<	}
584	<	}
585	<
586	<	public void testIterator(){
587	<	ArrayBlockingQueue q = populatedQueue(SIZE);
588	<	Iterator it = q.iterator();
589	<	try {
590	<	while(it.hasNext()){
591	<	assertEquals(it.next(), q.take());
592	<	}
593	<	} catch (InterruptedException e){
594	<	fail("Unexpected exception");
595	<	}
707	>	try {
708	>	q.toArray(new String[10]);
709	>	shouldThrow();
710	>	} catch (ArrayStoreException success) {}
711	>	try {
712	>	q.toArray(new String[0]);
713	>	shouldThrow();
714	>	} catch (ArrayStoreException success) {}
715		}
716
717	<	public void testIteratorOrdering() {
717	>	/**
718	>	* iterator iterates through all elements
719	>	*/
720	>	public void testIterator() throws InterruptedException {
721	>	ArrayBlockingQueue q = populatedQueue(SIZE);
722	>	Iterator it = q.iterator();
723	>	int i;
724	>	for (i = 0; it.hasNext(); i++)
725	>	assertTrue(q.contains(it.next()));
726	>	assertEquals(i, SIZE);
727	>	assertIteratorExhausted(it);
728	>
729	>	it = q.iterator();
730	>	for (i = 0; it.hasNext(); i++)
731	>	assertEquals(it.next(), q.take());
732	>	assertEquals(i, SIZE);
733	>	assertIteratorExhausted(it);
734	>	}
735
736	+	/**
737	+	* iterator of empty collection has no elements
738	+	*/
739	+	public void testEmptyIterator() {
740	+	assertIteratorExhausted(new ArrayBlockingQueue(SIZE).iterator());
741	+	}
742	+
743	+	/**
744	+	* iterator.remove removes current element
745	+	*/
746	+	public void testIteratorRemove() {
747		final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
748	+	q.add(two);
749	+	q.add(one);
750	+	q.add(three);
751
752	+	Iterator it = q.iterator();
753	+	it.next();
754	+	it.remove();
755	+
756	+	it = q.iterator();
757	+	assertSame(it.next(), one);
758	+	assertSame(it.next(), three);
759	+	assertFalse(it.hasNext());
760	+	}
761	+
762	+	/**
763	+	* iterator ordering is FIFO
764	+	*/
765	+	public void testIteratorOrdering() {
766	+	final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
767		q.add(one);
768		q.add(two);
769		q.add(three);
#	Line 607 | Line 772 | public class ArrayBlockingQueueTest exte
772
773		int k = 0;
774		for (Iterator it = q.iterator(); it.hasNext();) {
775	<	int i = ((Integer)(it.next())).intValue();
611	<	assertEquals("items should come out in order", ++k, i);
775	>	assertEquals(++k, it.next());
776		}
777	<
614	<	assertEquals("should go through 3 elements", 3, k);
777	>	assertEquals(3, k);
778		}
779
780	<	public void testWeaklyConsistentIteration () {
781	<
780	>	/**
781	>	* Modifications do not cause iterators to fail
782	>	*/
783	>	public void testWeaklyConsistentIteration() {
784		final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
620	–
785		q.add(one);
786		q.add(two);
787		q.add(three);
788	<
789	<	try {
790	<	for (Iterator it = q.iterator(); it.hasNext();) {
627	<	q.remove();
628	<	it.next();
629	<	}
630	<	}
631	<	catch (ConcurrentModificationException e) {
632	<	fail("weakly consistent iterator; should not get CME");
788	>	for (Iterator it = q.iterator(); it.hasNext();) {
789	>	q.remove();
790	>	it.next();
791		}
792	<
635	<	assertEquals("queue should be empty again", 0, q.size());
792	>	assertEquals(0, q.size());
793		}
794
795	<
796	<	public void testToString(){
795	>	/**
796	>	* toString contains toStrings of elements
797	>	*/
798	>	public void testToString() {
799		ArrayBlockingQueue q = populatedQueue(SIZE);
800		String s = q.toString();
801		for (int i = 0; i < SIZE; ++i) {
802	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
802	>	assertTrue(s.contains(String.valueOf(i)));
803		}
804	<	}
646	<
804	>	}
805
806	+	/**
807	+	* offer transfers elements across Executor tasks
808	+	*/
809		public void testOfferInExecutor() {
649	–
810		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
651	–
811		q.add(one);
812		q.add(two);
813	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
814	+	final ExecutorService executor = Executors.newFixedThreadPool(2);
815	+	try (PoolCleaner cleaner = cleaner(executor)) {
816	+	executor.execute(new CheckedRunnable() {
817	+	public void realRun() throws InterruptedException {
818	+	assertFalse(q.offer(three));
819	+	threadsStarted.await();
820	+	assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS));
821	+	assertEquals(0, q.remainingCapacity());
822	+	}});
823
824	<	ExecutorService executor = Executors.newFixedThreadPool(2);
825	<
826	<	executor.execute(new Runnable() {
827	<	public void run() {
828	<	threadAssertFalse(q.offer(three));
829	<	try {
830	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
662	<	threadAssertEquals(0, q.remainingCapacity());
663	<	}
664	<	catch (InterruptedException e) {
665	<	threadFail("should not be interrupted");
666	<	}
667	<	}
668	<	});
669	<
670	<	executor.execute(new Runnable() {
671	<	public void run() {
672	<	try {
673	<	Thread.sleep(SMALL_DELAY_MS);
674	<	threadAssertEquals(one, q.take());
675	<	}
676	<	catch (InterruptedException e) {
677	<	threadFail("should not be interrupted");
678	<	}
679	<	}
680	<	});
681	<
682	<	joinPool(executor);
683	<
824	>	executor.execute(new CheckedRunnable() {
825	>	public void realRun() throws InterruptedException {
826	>	threadsStarted.await();
827	>	assertEquals(0, q.remainingCapacity());
828	>	assertSame(one, q.take());
829	>	}});
830	>	}
831		}
832
833	+	/**
834	+	* timed poll retrieves elements across Executor threads
835	+	*/
836		public void testPollInExecutor() {
687	–
837		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
838	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
839	+	final ExecutorService executor = Executors.newFixedThreadPool(2);
840	+	try (PoolCleaner cleaner = cleaner(executor)) {
841	+	executor.execute(new CheckedRunnable() {
842	+	public void realRun() throws InterruptedException {
843	+	assertNull(q.poll());
844	+	threadsStarted.await();
845	+	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
846	+	checkEmpty(q);
847	+	}});
848
849	<	ExecutorService executor = Executors.newFixedThreadPool(2);
850	<
851	<	executor.execute(new Runnable() {
693	<	public void run() {
694	<	threadAssertNull(q.poll());
695	<	try {
696	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
697	<	threadAssertTrue(q.isEmpty());
698	<	}
699	<	catch (InterruptedException e) {
700	<	threadFail("should not be interrupted");
701	<	}
702	<	}
703	<	});
704	<
705	<	executor.execute(new Runnable() {
706	<	public void run() {
707	<	try {
708	<	Thread.sleep(SMALL_DELAY_MS);
849	>	executor.execute(new CheckedRunnable() {
850	>	public void realRun() throws InterruptedException {
851	>	threadsStarted.await();
852		q.put(one);
853	<	}
854	<	catch (InterruptedException e) {
855	<	threadFail("should not be interrupted");
713	<	}
714	<	}
715	<	});
716	<
717	<	joinPool(executor);
853	>	}});
854	>	}
855	>	}
856
857	+	/**
858	+	* A deserialized serialized queue has same elements in same order
859	+	*/
860	+	public void testSerialization() throws Exception {
861	+	Queue x = populatedQueue(SIZE);
862	+	Queue y = serialClone(x);
863	+
864	+	assertNotSame(x, y);
865	+	assertEquals(x.size(), y.size());
866	+	assertEquals(x.toString(), y.toString());
867	+	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
868	+	while (!x.isEmpty()) {
869	+	assertFalse(y.isEmpty());
870	+	assertEquals(x.remove(), y.remove());
871	+	}
872	+	assertTrue(y.isEmpty());
873		}
874
875	<	public void testSerialization() {
875	>	/**
876	>	* drainTo(c) empties queue into another collection c
877	>	*/
878	>	public void testDrainTo() {
879		ArrayBlockingQueue q = populatedQueue(SIZE);
880	+	ArrayList l = new ArrayList();
881	+	q.drainTo(l);
882	+	assertEquals(0, q.size());
883	+	assertEquals(SIZE, l.size());
884	+	for (int i = 0; i < SIZE; ++i)
885	+	assertEquals(l.get(i), new Integer(i));
886	+	q.add(zero);
887	+	q.add(one);
888	+	assertFalse(q.isEmpty());
889	+	assertTrue(q.contains(zero));
890	+	assertTrue(q.contains(one));
891	+	l.clear();
892	+	q.drainTo(l);
893	+	assertEquals(0, q.size());
894	+	assertEquals(2, l.size());
895	+	for (int i = 0; i < 2; ++i)
896	+	assertEquals(l.get(i), new Integer(i));
897	+	}
898
899	<	try {
900	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
901	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
902	<	out.writeObject(q);
903	<	out.close();
899	>	/**
900	>	* drainTo empties full queue, unblocking a waiting put.
901	>	*/
902	>	public void testDrainToWithActivePut() throws InterruptedException {
903	>	final ArrayBlockingQueue q = populatedQueue(SIZE);
904	>	Thread t = new Thread(new CheckedRunnable() {
905	>	public void realRun() throws InterruptedException {
906	>	q.put(new Integer(SIZE + 1));
907	>	}});
908	>
909	>	t.start();
910	>	ArrayList l = new ArrayList();
911	>	q.drainTo(l);
912	>	assertTrue(l.size() >= SIZE);
913	>	for (int i = 0; i < SIZE; ++i)
914	>	assertEquals(l.get(i), new Integer(i));
915	>	t.join();
916	>	assertTrue(q.size() + l.size() >= SIZE);
917	>	}
918
919	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
920	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
921	<	ArrayBlockingQueue r = (ArrayBlockingQueue)in.readObject();
922	<	assertEquals(q.size(), r.size());
923	<	while (!q.isEmpty())
924	<	assertEquals(q.remove(), r.remove());
925	<	} catch(Exception e){
926	<	fail("unexpected exception");
919	>	/**
920	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
921	>	*/
922	>	public void testDrainToN() {
923	>	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE * 2);
924	>	for (int i = 0; i < SIZE + 2; ++i) {
925	>	for (int j = 0; j < SIZE; j++)
926	>	assertTrue(q.offer(new Integer(j)));
927	>	ArrayList l = new ArrayList();
928	>	q.drainTo(l, i);
929	>	int k = (i < SIZE) ? i : SIZE;
930	>	assertEquals(k, l.size());
931	>	assertEquals(SIZE - k, q.size());
932	>	for (int j = 0; j < k; ++j)
933	>	assertEquals(l.get(j), new Integer(j));
934	>	do {} while (q.poll() != null);
935		}
936		}
937
938	<
938	>	/**
939	>	* remove(null), contains(null) always return false
940	>	*/
941	>	public void testNeverContainsNull() {
942	>	Collection<?>[] qs = {
943	>	populatedQueue(0, 1, 10, false),
944	>	populatedQueue(2, 2, 10, true),
945	>	};
946	>
947	>	for (Collection<?> q : qs) {
948	>	assertFalse(q.contains(null));
949	>	assertFalse(q.remove(null));
950	>	}
951	>	}
952		}

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