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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 1.90 by jsr166, Sun May 14 04:14:09 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	<	* Create a queue of given size containing consecutive
66	<	* Integers 0 ... n.
65	>	* Returns a new queue of given size containing consecutive
66	>	* Integers 0 ... n - 1.
67		*/
68	<	private ArrayBlockingQueue populatedQueue(int n) {
69	<	ArrayBlockingQueue q = new ArrayBlockingQueue(n);
68	>	static ArrayBlockingQueue<Integer> populatedQueue(int n) {
69	>	return populatedQueue(n, n, n, false);
70	>	}
71	>
72	>	/**
73	>	* Returns a new queue of given size containing consecutive
74	>	* Integers 0 ... n - 1, with given capacity range and fairness.
75	>	*/
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());
236	<	q.add(new Integer(SIZE));
237	<	} catch (IllegalStateException success){
238	<	}
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	>	q.add((Integer) SIZE);
238	>	shouldThrow();
239	>	} catch (IllegalStateException success) {}
240		}
241
242	<	public void testAddAll1(){
242	>	/**
243	>	* addAll(this) throws IAE
244	>	*/
245	>	public void testAddAllSelf() {
246	>	ArrayBlockingQueue q = populatedQueue(SIZE);
247		try {
248	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
249	<	q.addAll(null);
250	<	fail("Cannot add null collection");
159	<	}
160	<	catch (NullPointerException success) {}
248	>	q.addAll(q);
249	>	shouldThrow();
250	>	} catch (IllegalArgumentException success) {}
251		}
252	<	public void testAddAll2(){
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 {
164	–	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
165	–	Integer[] ints = new Integer[SIZE];
263		q.addAll(Arrays.asList(ints));
264	<	fail("Cannot add null elements");
265	<	}
169	<	catch (NullPointerException success) {}
264	>	shouldThrow();
265	>	} catch (NullPointerException success) {}
266		}
267	<	public void testAddAll3(){
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	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
281	<	Integer[] ints = new Integer[SIZE];
282	<	for (int i = 0; i < SIZE-1; ++i)
283	<	ints[i] = new Integer(i);
177	<	q.addAll(Arrays.asList(ints));
178	<	fail("Cannot add null elements");
179	<	}
180	<	catch (NullPointerException success) {}
280	>	q = populatedQueue(0, size, size, false);
281	>	q.addAll(Collections.nCopies(size + 1, 42));
282	>	shouldThrow();
283	>	} catch (IllegalStateException success) {}
284		}
285	<	public void testAddAll4(){
286	<	try {
287	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
288	<	Integer[] ints = new Integer[SIZE];
289	<	for (int i = 0; i < SIZE; ++i)
290	<	ints[i] = new Integer(i);
291	<	q.addAll(Arrays.asList(ints));
292	<	fail("Cannot add with insufficient capacity");
293	<	}
294	<	catch (IllegalStateException success) {}
285	>
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	<	public void testAddAll5(){
301	<	try {
302	<	Integer[] empty = new Integer[0];
303	<	Integer[] ints = new Integer[SIZE];
304	<	for (int i = 0; i < SIZE; ++i)
305	<	ints[i] = new Integer(i);
306	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
307	<	assertFalse(q.addAll(Arrays.asList(empty)));
308	<	assertTrue(q.addAll(Arrays.asList(ints)));
309	<	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");
300	>
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 testBlockingPut(){
315	<	Thread t = new Thread(new Runnable() {
316	<	public void run() {
317	<	int added = 0;
318	<	try {
319	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
320	<	for (int i = 0; i < SIZE; ++i) {
321	<	q.put(new Integer(i));
322	<	++added;
323	<	}
324	<	q.put(new Integer(SIZE));
325	<	threadFail("put should block");
326	<	} catch (InterruptedException ie){
327	<	threadAssertEquals(added, SIZE);
328	<	}
329	<	}});
330	<	try {
331	<	t.start();
332	<	Thread.sleep(SHORT_DELAY_MS);
333	<	t.interrupt();
334	<	t.join();
335	<	}
336	<	catch (InterruptedException ie) {
337	<	fail("Unexpected exception");
338	<	}
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 testPutWithTake() {
351	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
352	<	Thread t = new Thread(new Runnable() {
353	<	public void run(){
354	<	int added = 0;
355	<	try {
356	<	q.put(new Object());
357	<	++added;
358	<	q.put(new Object());
359	<	++added;
360	<	q.put(new Object());
361	<	++added;
362	<	q.put(new Object());
363	<	++added;
364	<	threadFail("Should block");
365	<	} catch (InterruptedException e){
366	<	threadAssertTrue(added >= 2);
367	<	}
368	<	}
369	<	});
370	<	try {
371	<	t.start();
372	<	Thread.sleep(SHORT_DELAY_MS);
373	<	q.take();
374	<	t.interrupt();
375	<	t.join();
376	<	} catch (Exception e){
377	<	fail("Unexpected exception");
378	<	}
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	>	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	+	/**
392	+	* timed offer times out if full and elements not taken
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	<	threadFail("Should block");
304	<	} catch (InterruptedException success){}
305	<	}
306	<	});
307	<
308	<	try {
309	<	t.start();
310	<	Thread.sleep(SHORT_DELAY_MS);
311	<	t.interrupt();
312	<	t.join();
313	<	} catch (Exception e){
314	<	fail("Unexpected exception");
315	<	}
316	<	}
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	<	public void testTake(){
406	<	try {
407	<	ArrayBlockingQueue q = populatedQueue(SIZE);
408	<	for (int i = 0; i < SIZE; ++i) {
409	<	assertEquals(i, ((Integer)q.take()).intValue());
410	<	}
324	<	} catch (InterruptedException e){
325	<	fail("Unexpected exception");
326	<	}
327	<	}
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	<	public void testTakeFromEmpty() {
413	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
414	<	Thread t = new Thread(new Runnable() {
415	<	public void run(){
416	<	try {
417	<	q.take();
418	<	threadFail("Should block");
419	<	} catch (InterruptedException success){ }
420	<	}
421	<	});
422	<	try {
423	<	t.start();
341	<	Thread.sleep(SHORT_DELAY_MS);
342	<	t.interrupt();
343	<	t.join();
344	<	} catch (Exception e){
345	<	fail("Unexpected exception");
346	<	}
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	<	public void testBlockingTake(){
427	<	Thread t = new Thread(new Runnable() {
428	<	public void run() {
429	<	try {
430	<	ArrayBlockingQueue q = populatedQueue(SIZE);
431	<	for (int i = 0; i < SIZE; ++i) {
432	<	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");
426	>	/**
427	>	* take retrieves elements in FIFO order
428	>	*/
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() 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	<	public void testPoll(){
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
469	>	*/
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	<	public void testTimedPoll0() {
479	<	try {
480	<	ArrayBlockingQueue q = populatedQueue(SIZE);
481	<	for (int i = 0; i < SIZE; ++i) {
482	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
483	<	}
484	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
485	<	} catch (InterruptedException e){
486	<	fail("Unexpected exception");
487	<	}
478	>	/**
479	>	* timed poll with zero timeout succeeds when non-empty, else times out
480	>	*/
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	<	public void testTimedPoll() {
491	<	try {
492	<	ArrayBlockingQueue q = populatedQueue(SIZE);
493	<	for (int i = 0; i < SIZE; ++i) {
494	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
495	<	}
496	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
497	<	} catch (InterruptedException e){
498	<	fail("Unexpected exception");
499	<	}
500	<	}
501	<
502	<	public void testInterruptedTimedPoll(){
503	<	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	<	}
490	>	/**
491	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
492	>	*/
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	<	public void testTimedPollWithOffer(){
507	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
508	<	Thread t = new Thread(new Runnable() {
509	<	public void run(){
510	<	try {
511	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
512	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
513	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
514	<	threadFail("Should block");
515	<	} catch (InterruptedException success) { }
516	<	}
517	<	});
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	<	}
506	>	/**
507	>	* Interrupted timed poll throws InterruptedException instead of
508	>	* returning timeout status
509	>	*/
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	+	Thread.currentThread().interrupt();
520	+	try {
521	+	q.poll(LONG_DELAY_MS, MILLISECONDS);
522	+	shouldThrow();
523	+	} catch (InterruptedException success) {}
524	+	assertFalse(Thread.interrupted());
525
526	<	public void testPeek(){
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
545	>	*/
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	<	public void testElement(){
557	>	/**
558	>	* element returns next element, or throws NSEE if empty
559	>	*/
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	<	fail("no such element");
569	<	}
474	<	catch (NoSuchElementException success) {}
568	>	shouldThrow();
569	>	} catch (NoSuchElementException success) {}
570		}
571
572	<	public void testRemove(){
572	>	/**
573	>	* remove removes next element, or throws NSEE if empty
574	>	*/
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	<	fail("remove should throw");
583	<	} catch (NoSuchElementException success){
486	<	}
582	>	shouldThrow();
583	>	} catch (NoSuchElementException success) {}
584		}
585
586	<	public void testRemoveElement(){
587	<	ArrayBlockingQueue q = populatedQueue(SIZE);
588	<	for (int i = 1; i < SIZE; i+=2) {
589	<	assertTrue(q.remove(new Integer(i)));
590	<	}
591	<	for (int i = 0; i < SIZE; i+=2) {
592	<	assertTrue(q.remove(new Integer(i)));
593	<	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) {
586	>	/**
587	>	* contains(x) reports true when elements added but not yet removed
588	>	*/
589	>	public void testContains() {
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		}
599
600	<	public void testClear(){
601	<	ArrayBlockingQueue q = populatedQueue(SIZE);
600	>	/**
601	>	* clear removes all elements
602	>	*/
603	>	public void testClear() {
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		}
617
618	<	public void testContainsAll(){
618	>	/**
619	>	* containsAll(c) is true when c contains a subset of elements
620	>	*/
621	>	public void testContainsAll() {
622		ArrayBlockingQueue q = populatedQueue(SIZE);
623		ArrayBlockingQueue p = new ArrayBlockingQueue(SIZE);
624		for (int i = 0; i < SIZE; ++i) {
#	Line 530 | Line 629 | public class ArrayBlockingQueueTest exte
629		assertTrue(p.containsAll(q));
630		}
631
632	<	public void testRetainAll(){
632	>	/**
633	>	* retainAll(c) retains only those elements of c and reports true if changed
634	>	*/
635	>	public void testRetainAll() {
636		ArrayBlockingQueue q = populatedQueue(SIZE);
637		ArrayBlockingQueue p = populatedQueue(SIZE);
638		for (int i = 0; i < SIZE; ++i) {
#	Line 541 | 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		}
650
651	<	public void testRemoveAll(){
651	>	/**
652	>	* removeAll(c) removes only those elements of c and reports true if changed
653	>	*/
654	>	public void testRemoveAll() {
655		for (int i = 1; i < SIZE; ++i) {
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() and toArray(a) contain all elements in FIFO order
700	+	*/
701	+	public void testToArray() {
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	<	public void testToArray(){
723	>	/**
724	>	* toArray(incompatible array type) throws ArrayStoreException
725	>	*/
726	>	public void testToArray_incompatibleArrayType() {
727		ArrayBlockingQueue q = populatedQueue(SIZE);
728	<	Object[] o = q.toArray();
729	<	try {
730	<	for(int i = 0; i < o.length; i++)
731	<	assertEquals(o[i], q.take());
732	<	} catch (InterruptedException e){
733	<	fail("Unexpected exception");
734	<	}
735	<	}
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	<	}
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	<	public void testIteratorOrdering() {
738	>	/**
739	>	* iterator iterates through all elements
740	>	*/
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	>	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	+	/**
758	+	* iterator of empty collection has no elements
759	+	*/
760	+	public void testEmptyIterator() {
761	+	assertIteratorExhausted(new ArrayBlockingQueue(SIZE).iterator());
762	+	}
763	+
764	+	/**
765	+	* iterator.remove removes current element
766	+	*/
767	+	public void testIteratorRemove() {
768		final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
769	+	q.add(two);
770	+	q.add(one);
771	+	q.add(three);
772	+
773	+	Iterator it = q.iterator();
774	+	it.next();
775	+	it.remove();
776	+
777	+	it = q.iterator();
778	+	assertSame(it.next(), one);
779	+	assertSame(it.next(), three);
780	+	assertFalse(it.hasNext());
781	+	}
782
783	+	/**
784	+	* iterator ordering is FIFO
785	+	*/
786	+	public void testIteratorOrdering() {
787	+	final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
788		q.add(one);
789		q.add(two);
790		q.add(three);
#	Line 607 | 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();
611	<	assertEquals("items should come out in order", ++k, i);
796	>	assertEquals(++k, it.next());
797		}
798	<
614	<	assertEquals("should go through 3 elements", 3, k);
798	>	assertEquals(3, k);
799		}
800
801	<	public void testWeaklyConsistentIteration () {
802	<
801	>	/**
802	>	* Modifications do not cause iterators to fail
803	>	*/
804	>	public void testWeaklyConsistentIteration() {
805		final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
620	–
806		q.add(one);
807		q.add(two);
808		q.add(three);
809	<
810	<	try {
811	<	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");
809	>	for (Iterator it = q.iterator(); it.hasNext();) {
810	>	q.remove();
811	>	it.next();
812		}
813	<
635	<	assertEquals("queue should be empty again", 0, q.size());
813	>	assertEquals(0, q.size());
814		}
815
816	<
817	<	public void testToString(){
816	>	/**
817	>	* toString contains toStrings of elements
818	>	*/
819	>	public void testToString() {
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	<	}
646	<
825	>	}
826
827	+	/**
828	+	* offer transfers elements across Executor tasks
829	+	*/
830		public void testOfferInExecutor() {
649	–
831		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
651	–
832		q.add(one);
833		q.add(two);
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	<	ExecutorService executor = Executors.newFixedThreadPool(2);
846	<
847	<	executor.execute(new Runnable() {
848	<	public void run() {
849	<	threadAssertFalse(q.offer(three));
850	<	try {
851	<	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	<
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	+	* timed poll retrieves elements across Executor threads
856	+	*/
857		public void testPollInExecutor() {
687	–
858		final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
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	<	ExecutorService executor = Executors.newFixedThreadPool(2);
871	<
872	<	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);
870	>	executor.execute(new CheckedRunnable() {
871	>	public void realRun() throws InterruptedException {
872	>	threadsStarted.await();
873		q.put(one);
874	<	}
875	<	catch (InterruptedException e) {
876	<	threadFail("should not be interrupted");
713	<	}
714	<	}
715	<	});
716	<
717	<	joinPool(executor);
874	>	}});
875	>	}
876	>	}
877
878	+	/**
879	+	* A deserialized serialized queue has same elements in same order
880	+	*/
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	<	public void testSerialization() {
896	>	/**
897	>	* drainTo(c) empties queue into another collection c
898	>	*/
899	>	public void testDrainTo() {
900		ArrayBlockingQueue q = populatedQueue(SIZE);
901	+	ArrayList l = new ArrayList();
902	+	q.drainTo(l);
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	<	try {
921	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
922	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
923	<	out.writeObject(q);
924	<	out.close();
920	>	/**
921	>	* drainTo empties full queue, unblocking a waiting put.
922	>	*/
923	>	public void testDrainToWithActivePut() throws InterruptedException {
924	>	final ArrayBlockingQueue q = populatedQueue(SIZE);
925	>	Thread t = new Thread(new CheckedRunnable() {
926	>	public void realRun() throws InterruptedException {
927	>	q.put(new Integer(SIZE + 1));
928	>	}});
929	>
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	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
941	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
942	<	ArrayBlockingQueue r = (ArrayBlockingQueue)in.readObject();
943	<	assertEquals(q.size(), r.size());
944	<	while (!q.isEmpty())
945	<	assertEquals(q.remove(), r.remove());
946	<	} catch(Exception e){
947	<	fail("unexpected exception");
940	>	/**
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	>	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(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	<
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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