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Comparing jsr166/src/test/tck/ArrayBlockingQueueTest.java (file contents):
Revision 1.20 by jsr166, Sat Nov 21 17:38:05 2009 UTC vs.
Revision 1.100 by jsr166, Wed Jan 27 02:55:18 2021 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
8
9	–
10	–	import junit.framework.*;
11	–	import java.util.*;
12	–	import java.util.concurrent.*;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	<	import java.io.*;
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 = randomBoolean();
38	>	return populatedQueue(0, SIZE, 2 * SIZE, fair);
39	>	}
40	>	public Object makeElement(int i) { return JSR166TestCase.itemFor(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<Item> emptyCollection() {
54	>	return populatedQueue(0, SIZE, 2 * SIZE, true);
55	>	}
56	>	}
57	>
58	>	public static class NonFair extends BlockingQueueTest {
59	>	protected BlockingQueue<Item> 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	>	* Items 0 ... n - 1.
67		*/
68	<	private ArrayBlockingQueue populatedQueue(int n) {
69	<	ArrayBlockingQueue q = new ArrayBlockingQueue(n);
68	>	static ArrayBlockingQueue<Item> populatedQueue(int n) {
69	>	return populatedQueue(n, n, n, false);
70	>	}
71	>
72	>	/**
73	>	* Returns a new queue of given size containing consecutive
74	>	* Items 0 ... n - 1, with given capacity range and fairness.
75	>	*/
76	>	static ArrayBlockingQueue<Item> 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<Item> 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(fortytwo);
86	>	for (int i = 0; i < n; i++) q.remove();
87	>	}
88	>	for (int i = 0; i < size; i++)
89	>	mustOffer(q, i);
90	>	mustEqual(size == 0, q.isEmpty());
91	>	mustEqual(capacity - size, q.remainingCapacity());
92	>	mustEqual(size, q.size());
93	>	if (size > 0)
94	>	mustEqual(0, q.peek());
95		return q;
96		}
97
#	Line 40 | Line 99 | public class ArrayBlockingQueueTest exte
99		* A new queue has the indicated capacity
100		*/
101		public void testConstructor1() {
102	<	assertEquals(SIZE, new ArrayBlockingQueue(SIZE).remainingCapacity());
102	>	mustEqual(SIZE, new ArrayBlockingQueue<Item>(SIZE).remainingCapacity());
103		}
104
105		/**
106	<	* Constructor throws IAE if capacity argument nonpositive
106	>	* Constructor throws IllegalArgumentException if capacity argument nonpositive
107		*/
108	<	public void testConstructor2() {
109	<	try {
110	<	ArrayBlockingQueue q = new ArrayBlockingQueue(0);
111	<	shouldThrow();
112	<	} catch (IllegalArgumentException success) {}
108	>	public void testConstructor_nonPositiveCapacity() {
109	>	for (int i : new int[] { 0, -1, Integer.MIN_VALUE }) {
110	>	try {
111	>	new ArrayBlockingQueue<Item>(i);
112	>	shouldThrow();
113	>	} catch (IllegalArgumentException success) {}
114	>	for (boolean fair : new boolean[] { true, false }) {
115	>	try {
116	>	new ArrayBlockingQueue<Item>(i, fair);
117	>	shouldThrow();
118	>	} catch (IllegalArgumentException success) {}
119	>	}
120	>	}
121		}
122
123		/**
124		* Initializing from null Collection throws NPE
125		*/
126	<	public void testConstructor3() {
126	>	public void testConstructor_nullCollection() {
127		try {
128	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1, true, null);
128	>	new ArrayBlockingQueue<Item>(1, true, null);
129		shouldThrow();
130		} catch (NullPointerException success) {}
131		}
#	Line 67 | Line 134 | public class ArrayBlockingQueueTest exte
134		* Initializing from Collection of null elements throws NPE
135		*/
136		public void testConstructor4() {
137	+	Collection<Item> elements = Arrays.asList(new Item[SIZE]);
138		try {
139	<	Integer[] ints = new Integer[SIZE];
72	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
139	>	new ArrayBlockingQueue<Item>(SIZE, false, elements);
140		shouldThrow();
141		} catch (NullPointerException success) {}
142		}
#	Line 78 | Line 145 | public class ArrayBlockingQueueTest exte
145		* Initializing from Collection with some null elements throws NPE
146		*/
147		public void testConstructor5() {
148	+	Item[] items = new Item[2]; items[0] = zero;
149	+	Collection<Item> elements = Arrays.asList(items);
150		try {
151	<	Integer[] ints = new Integer[SIZE];
83	<	for (int i = 0; i < SIZE-1; ++i)
84	<	ints[i] = new Integer(i);
85	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, false, Arrays.asList(ints));
151	>	new ArrayBlockingQueue<Item>(SIZE, false, elements);
152		shouldThrow();
153		} catch (NullPointerException success) {}
154		}
155
156		/**
157	<	* Initializing from too large collection throws IAE
157	>	* Initializing from too large collection throws IllegalArgumentException
158		*/
159	<	public void testConstructor6() {
159	>	public void testConstructor_collectionTooLarge() {
160	>	// just barely fits - succeeds
161	>	new ArrayBlockingQueue<Object>(SIZE, false,
162	>	Collections.nCopies(SIZE, ""));
163		try {
164	<	Integer[] ints = new Integer[SIZE];
165	<	for (int i = 0; i < SIZE; ++i)
97	<	ints[i] = new Integer(i);
98	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1, false, Arrays.asList(ints));
164	>	new ArrayBlockingQueue<Object>(SIZE - 1, false,
165	>	Collections.nCopies(SIZE, ""));
166		shouldThrow();
167		} catch (IllegalArgumentException success) {}
168		}
#	Line 104 | Line 171 | public class ArrayBlockingQueueTest exte
171		* Queue contains all elements of collection used to initialize
172		*/
173		public void testConstructor7() {
174	<	Integer[] ints = new Integer[SIZE];
175	<	for (int i = 0; i < SIZE; ++i)
176	<	ints[i] = new Integer(i);
110	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE, true, Arrays.asList(ints));
174	>	Item[] items = defaultItems;
175	>	Collection<Item> elements = Arrays.asList(items);
176	>	ArrayBlockingQueue<Item> q = new ArrayBlockingQueue<>(SIZE, true, elements);
177		for (int i = 0; i < SIZE; ++i)
178	<	assertEquals(ints[i], q.poll());
178	>	mustEqual(items[i], q.poll());
179		}
180
181		/**
182		* Queue transitions from empty to full when elements added
183		*/
184		public void testEmptyFull() {
185	<	ArrayBlockingQueue q = new ArrayBlockingQueue(2);
185	>	BlockingQueue<Item> q = populatedQueue(0, 2, 2, false);
186		assertTrue(q.isEmpty());
187	<	assertEquals(2, q.remainingCapacity());
187	>	mustEqual(2, q.remainingCapacity());
188		q.add(one);
189		assertFalse(q.isEmpty());
190	<	q.add(two);
190	>	assertTrue(q.offer(two));
191		assertFalse(q.isEmpty());
192	<	assertEquals(0, q.remainingCapacity());
192	>	mustEqual(0, q.remainingCapacity());
193		assertFalse(q.offer(three));
194		}
195
#	Line 131 | Line 197 | public class ArrayBlockingQueueTest exte
197		* remainingCapacity decreases on add, increases on remove
198		*/
199		public void testRemainingCapacity() {
200	<	ArrayBlockingQueue q = populatedQueue(SIZE);
201	<	for (int i = 0; i < SIZE; ++i) {
202	<	assertEquals(i, q.remainingCapacity());
203	<	assertEquals(SIZE-i, q.size());
204	<	q.remove();
200	>	int size = ThreadLocalRandom.current().nextInt(1, SIZE);
201	>	BlockingQueue<Item> q = populatedQueue(size, size, 2 * size, false);
202	>	int spare = q.remainingCapacity();
203	>	int capacity = spare + size;
204	>	for (int i = 0; i < size; i++) {
205	>	mustEqual(spare + i, q.remainingCapacity());
206	>	mustEqual(capacity, q.size() + q.remainingCapacity());
207	>	mustEqual(i, q.remove());
208	>	}
209	>	for (int i = 0; i < size; i++) {
210	>	mustEqual(capacity - i, q.remainingCapacity());
211	>	mustEqual(capacity, q.size() + q.remainingCapacity());
212	>	mustAdd(q, i);
213		}
140	–	for (int i = 0; i < SIZE; ++i) {
141	–	assertEquals(SIZE-i, q.remainingCapacity());
142	–	assertEquals(i, q.size());
143	–	q.add(new Integer(i));
144	–	}
145	–	}
146	–
147	–	/**
148	–	*  offer(null) throws NPE
149	–	*/
150	–	public void testOfferNull() {
151	–	try {
152	–	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
153	–	q.offer(null);
154	–	shouldThrow();
155	–	} catch (NullPointerException success) {}
156	–	}
157	–
158	–	/**
159	–	*  add(null) throws NPE
160	–	*/
161	–	public void testAddNull() {
162	–	try {
163	–	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
164	–	q.add(null);
165	–	shouldThrow();
166	–	} catch (NullPointerException success) {}
214		}
215
216		/**
217		* Offer succeeds if not full; fails if full
218		*/
219		public void testOffer() {
220	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
220	>	ArrayBlockingQueue<Item> q = new ArrayBlockingQueue<>(1);
221		assertTrue(q.offer(zero));
222		assertFalse(q.offer(one));
223		}
224
225		/**
226	<	* add succeeds if not full; throws ISE if full
226	>	* add succeeds if not full; throws IllegalStateException if full
227		*/
228		public void testAdd() {
229	+	ArrayBlockingQueue<Item> q = new ArrayBlockingQueue<>(SIZE);
230	+	for (int i = 0; i < SIZE; i++) assertTrue(q.add(itemFor(i)));
231	+	mustEqual(0, q.remainingCapacity());
232		try {
233	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
184	<	for (int i = 0; i < SIZE; ++i) {
185	<	assertTrue(q.add(new Integer(i)));
186	<	}
187	<	assertEquals(0, q.remainingCapacity());
188	<	q.add(new Integer(SIZE));
233	>	q.add(itemFor(SIZE));
234		shouldThrow();
235		} catch (IllegalStateException success) {}
236		}
237
238		/**
239	<	*  addAll(null) throws NPE
195	<	*/
196	<	public void testAddAll1() {
197	<	try {
198	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
199	<	q.addAll(null);
200	<	shouldThrow();
201	<	} catch (NullPointerException success) {}
202	<	}
203	<
204	<	/**
205	<	* addAll(this) throws IAE
239	>	* addAll(this) throws IllegalArgumentException
240		*/
241		public void testAddAllSelf() {
242	+	ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
243		try {
209	–	ArrayBlockingQueue q = populatedQueue(SIZE);
244		q.addAll(q);
245		shouldThrow();
246		} catch (IllegalArgumentException success) {}
247		}
248
215	–
216	–	/**
217	–	*  addAll of a collection with null elements throws NPE
218	–	*/
219	–	public void testAddAll2() {
220	–	try {
221	–	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
222	–	Integer[] ints = new Integer[SIZE];
223	–	q.addAll(Arrays.asList(ints));
224	–	shouldThrow();
225	–	} catch (NullPointerException success) {}
226	–	}
249		/**
250		* addAll of a collection with any null elements throws NPE after
251		* possibly adding some elements
252		*/
253		public void testAddAll3() {
254	+	ArrayBlockingQueue<Item> q = new ArrayBlockingQueue<>(SIZE);
255	+	Item[] items = new Item[2]; items[0] = zero;
256		try {
257	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
234	<	Integer[] ints = new Integer[SIZE];
235	<	for (int i = 0; i < SIZE-1; ++i)
236	<	ints[i] = new Integer(i);
237	<	q.addAll(Arrays.asList(ints));
257	>	q.addAll(Arrays.asList(items));
258		shouldThrow();
259		} catch (NullPointerException success) {}
260		}
261	+
262		/**
263	<	* addAll throws ISE if not enough room
263	>	* addAll throws IllegalStateException if not enough room
264		*/
265	<	public void testAddAll4() {
265	>	public void testAddAll_insufficientSpace() {
266	>	int size = ThreadLocalRandom.current().nextInt(1, SIZE);
267	>	ArrayBlockingQueue<Item> q = populatedQueue(0, size, size, false);
268	>	// Just fits:
269	>	q.addAll(populatedQueue(size, size, 2 * size, false));
270	>	mustEqual(0, q.remainingCapacity());
271	>	mustEqual(size, q.size());
272	>	mustEqual(0, q.peek());
273		try {
274	<	ArrayBlockingQueue q = new ArrayBlockingQueue(1);
275	<	Integer[] ints = new Integer[SIZE];
248	<	for (int i = 0; i < SIZE; ++i)
249	<	ints[i] = new Integer(i);
250	<	q.addAll(Arrays.asList(ints));
274	>	q = populatedQueue(0, size, size, false);
275	>	q.addAll(Collections.nCopies(size + 1, fortytwo));
276		shouldThrow();
277		} catch (IllegalStateException success) {}
278		}
279	+
280		/**
281		* Queue contains all elements, in traversal order, of successful addAll
282		*/
283		public void testAddAll5() {
284	<	Integer[] empty = new Integer[0];
285	<	Integer[] ints = new Integer[SIZE];
286	<	for (int i = 0; i < SIZE; ++i)
261	<	ints[i] = new Integer(i);
262	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
284	>	Item[] empty = new Item[0];
285	>	Item[] items = defaultItems;
286	>	ArrayBlockingQueue<Item> q = new ArrayBlockingQueue<>(SIZE);
287		assertFalse(q.addAll(Arrays.asList(empty)));
288	<	assertTrue(q.addAll(Arrays.asList(ints)));
288	>	assertTrue(q.addAll(Arrays.asList(items)));
289		for (int i = 0; i < SIZE; ++i)
290	<	assertEquals(ints[i], q.poll());
290	>	mustEqual(items[i], q.poll());
291		}
292
293		/**
270	–	*  put(null) throws NPE
271	–	*/
272	–	public void testPutNull() throws InterruptedException {
273	–	try {
274	–	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
275	–	q.put(null);
276	–	shouldThrow();
277	–	} catch (NullPointerException success) {}
278	–	}
279	–
280	–	/**
294		* all elements successfully put are contained
295		*/
296		public void testPut() throws InterruptedException {
297	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
297	>	ArrayBlockingQueue<Item> q = new ArrayBlockingQueue<>(SIZE);
298		for (int i = 0; i < SIZE; ++i) {
299	<	Integer I = new Integer(i);
300	<	q.put(I);
301	<	assertTrue(q.contains(I));
299	>	Item x = itemFor(i);
300	>	q.put(x);
301	>	mustContain(q, x);
302		}
303	<	assertEquals(0, q.remainingCapacity());
303	>	mustEqual(0, q.remainingCapacity());
304		}
305
306		/**
307		* put blocks interruptibly if full
308		*/
309		public void testBlockingPut() throws InterruptedException {
310	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE);
311	<	Thread t = new Thread(new CheckedRunnable() {
312	<	public void realRun() {
313	<	int added = 0;
310	>	final ArrayBlockingQueue<Item> q = new ArrayBlockingQueue<>(SIZE);
311	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
312	>	Thread t = newStartedThread(new CheckedRunnable() {
313	>	public void realRun() throws InterruptedException {
314	>	for (int i = 0; i < SIZE; ++i)
315	>	q.put(itemFor(i));
316	>	mustEqual(SIZE, q.size());
317	>	mustEqual(0, q.remainingCapacity());
318	>
319	>	Thread.currentThread().interrupt();
320		try {
321	<	for (int i = 0; i < SIZE; ++i) {
322	<	q.put(new Integer(i));
323	<	++added;
324	<	}
306	<	q.put(new Integer(SIZE));
307	<	threadShouldThrow();
308	<	} catch (InterruptedException success) {
309	<	threadAssertEquals(added, SIZE);
310	<	}}});
321	>	q.put(ninetynine);
322	>	shouldThrow();
323	>	} catch (InterruptedException success) {}
324	>	assertFalse(Thread.interrupted());
325
326	<	t.start();
327	<	Thread.sleep(MEDIUM_DELAY_MS);
326	>	pleaseInterrupt.countDown();
327	>	try {
328	>	q.put(ninetynine);
329	>	shouldThrow();
330	>	} catch (InterruptedException success) {}
331	>	assertFalse(Thread.interrupted());
332	>	}});
333	>
334	>	await(pleaseInterrupt);
335	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
336		t.interrupt();
337	<	t.join();
337	>	awaitTermination(t);
338	>	mustEqual(SIZE, q.size());
339	>	mustEqual(0, q.remainingCapacity());
340		}
341
342		/**
343	<	* put blocks waiting for take when full
343	>	* put blocks interruptibly waiting for take when full
344		*/
345		public void testPutWithTake() throws InterruptedException {
346	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
347	<	Thread t = new Thread(new CheckedRunnable() {
348	<	public void realRun() {
349	<	int added = 0;
346	>	final int capacity = 2;
347	>	final ArrayBlockingQueue<Item> q = new ArrayBlockingQueue<>(capacity);
348	>	final CountDownLatch pleaseTake = new CountDownLatch(1);
349	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
350	>	Thread t = newStartedThread(new CheckedRunnable() {
351	>	public void realRun() throws InterruptedException {
352	>	for (int i = 0; i < capacity; i++)
353	>	q.put(itemFor(i));
354	>	pleaseTake.countDown();
355	>	q.put(eightysix);
356	>
357	>	Thread.currentThread().interrupt();
358	>	try {
359	>	q.put(ninetynine);
360	>	shouldThrow();
361	>	} catch (InterruptedException success) {}
362	>	assertFalse(Thread.interrupted());
363	>
364	>	pleaseInterrupt.countDown();
365		try {
366	<	q.put(new Object());
367	<	++added;
368	<	q.put(new Object());
369	<	++added;
331	<	q.put(new Object());
332	<	++added;
333	<	q.put(new Object());
334	<	++added;
335	<	threadShouldThrow();
336	<	} catch (InterruptedException success) {
337	<	threadAssertTrue(added >= 2);
338	<	}
366	>	q.put(ninetynine);
367	>	shouldThrow();
368	>	} catch (InterruptedException success) {}
369	>	assertFalse(Thread.interrupted());
370		}});
371
372	<	t.start();
373	<	Thread.sleep(SHORT_DELAY_MS);
374	<	q.take();
372	>	await(pleaseTake);
373	>	mustEqual(0, q.remainingCapacity());
374	>	mustEqual(0, q.take());
375	>
376	>	await(pleaseInterrupt);
377	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
378		t.interrupt();
379	<	t.join();
379	>	awaitTermination(t);
380	>	mustEqual(0, q.remainingCapacity());
381		}
382
383		/**
384		* timed offer times out if full and elements not taken
385		*/
386	<	public void testTimedOffer() throws InterruptedException {
387	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
388	<	Thread t = new ThreadShouldThrow(InterruptedException.class) {
386	>	public void testTimedOffer() {
387	>	final ArrayBlockingQueue<Item> q = new ArrayBlockingQueue<>(2);
388	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
389	>	Thread t = newStartedThread(new CheckedRunnable() {
390		public void realRun() throws InterruptedException {
391	<	q.put(new Object());
392	<	q.put(new Object());
393	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, MILLISECONDS));
394	<	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
395	<	}};
391	>	q.put(one);
392	>	q.put(two);
393	>	long startTime = System.nanoTime();
394	>	assertFalse(q.offer(zero, timeoutMillis(), MILLISECONDS));
395	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
396
397	<	t.start();
398	<	Thread.sleep(SHORT_DELAY_MS);
397	>	Thread.currentThread().interrupt();
398	>	try {
399	>	q.offer(three, randomTimeout(), randomTimeUnit());
400	>	shouldThrow();
401	>	} catch (InterruptedException success) {}
402	>	assertFalse(Thread.interrupted());
403	>
404	>	pleaseInterrupt.countDown();
405	>	try {
406	>	q.offer(four, LONGER_DELAY_MS, MILLISECONDS);
407	>	shouldThrow();
408	>	} catch (InterruptedException success) {}
409	>	assertFalse(Thread.interrupted());
410	>	}});
411	>
412	>	await(pleaseInterrupt);
413	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
414		t.interrupt();
415	<	t.join();
415	>	awaitTermination(t);
416		}
417
418		/**
419		* take retrieves elements in FIFO order
420		*/
421		public void testTake() throws InterruptedException {
422	<	ArrayBlockingQueue q = populatedQueue(SIZE);
422	>	ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
423		for (int i = 0; i < SIZE; ++i) {
424	<	assertEquals(i, ((Integer)q.take()).intValue());
424	>	mustEqual(i, q.take());
425		}
426		}
427
428		/**
378	–	* take blocks interruptibly when empty
379	–	*/
380	–	public void testTakeFromEmpty() throws InterruptedException {
381	–	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
382	–	Thread t = new ThreadShouldThrow(InterruptedException.class) {
383	–	public void realRun() throws InterruptedException {
384	–	q.take();
385	–	}};
386	–
387	–	t.start();
388	–	Thread.sleep(SHORT_DELAY_MS);
389	–	t.interrupt();
390	–	t.join();
391	–	}
392	–
393	–	/**
429		* Take removes existing elements until empty, then blocks interruptibly
430		*/
431		public void testBlockingTake() throws InterruptedException {
432	<	Thread t = new ThreadShouldThrow(InterruptedException.class) {
432	>	final ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
433	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
434	>	Thread t = newStartedThread(new CheckedRunnable() {
435		public void realRun() throws InterruptedException {
436	<	ArrayBlockingQueue q = populatedQueue(SIZE);
400	<	for (int i = 0; i < SIZE; ++i) {
401	<	threadAssertEquals(i, ((Integer)q.take()).intValue());
402	<	}
403	<	q.take();
404	<	}};
436	>	for (int i = 0; i < SIZE; i++) mustEqual(i, q.take());
437
438	<	t.start();
439	<	Thread.sleep(SHORT_DELAY_MS);
440	<	t.interrupt();
441	<	t.join();
442	<	}
438	>	Thread.currentThread().interrupt();
439	>	try {
440	>	q.take();
441	>	shouldThrow();
442	>	} catch (InterruptedException success) {}
443	>	assertFalse(Thread.interrupted());
444
445	+	pleaseInterrupt.countDown();
446	+	try {
447	+	q.take();
448	+	shouldThrow();
449	+	} catch (InterruptedException success) {}
450	+	assertFalse(Thread.interrupted());
451	+	}});
452	+
453	+	await(pleaseInterrupt);
454	+	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
455	+	t.interrupt();
456	+	awaitTermination(t);
457	+	}
458
459		/**
460		* poll succeeds unless empty
461		*/
462		public void testPoll() {
463	<	ArrayBlockingQueue q = populatedQueue(SIZE);
463	>	ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
464		for (int i = 0; i < SIZE; ++i) {
465	<	assertEquals(i, ((Integer)q.poll()).intValue());
465	>	mustEqual(i, q.poll());
466		}
467		assertNull(q.poll());
468		}
469
470		/**
471	<	* timed pool with zero timeout succeeds when non-empty, else times out
471	>	* timed poll with zero timeout succeeds when non-empty, else times out
472		*/
473		public void testTimedPoll0() throws InterruptedException {
474	<	ArrayBlockingQueue q = populatedQueue(SIZE);
474	>	ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
475		for (int i = 0; i < SIZE; ++i) {
476	<	assertEquals(i, ((Integer)q.poll(0, MILLISECONDS)).intValue());
476	>	mustEqual(i, q.poll(0, MILLISECONDS));
477		}
478		assertNull(q.poll(0, MILLISECONDS));
479	+	checkEmpty(q);
480		}
481
482		/**
483	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
483	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
484		*/
485		public void testTimedPoll() throws InterruptedException {
486	<	ArrayBlockingQueue q = populatedQueue(SIZE);
486	>	ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
487		for (int i = 0; i < SIZE; ++i) {
488	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, MILLISECONDS)).intValue());
489	<	}
490	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
488	>	long startTime = System.nanoTime();
489	>	mustEqual(i, q.poll(LONG_DELAY_MS, MILLISECONDS));
490	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
491	>	}
492	>	long startTime = System.nanoTime();
493	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
494	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
495	>	checkEmpty(q);
496		}
497
498		/**
#	Line 448 | Line 500 | public class ArrayBlockingQueueTest exte
500		* returning timeout status
501		*/
502		public void testInterruptedTimedPoll() throws InterruptedException {
503	<	Thread t = new ThreadShouldThrow(InterruptedException.class) {
503	>	final BlockingQueue<Item> q = populatedQueue(SIZE);
504	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
505	>	Thread t = newStartedThread(new CheckedRunnable() {
506		public void realRun() throws InterruptedException {
507	<	ArrayBlockingQueue q = populatedQueue(SIZE);
508	<	for (int i = 0; i < SIZE; ++i) {
455	<	threadAssertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, MILLISECONDS)).intValue());
456	<	}
457	<	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
458	<	}};
507	>	for (int i = 0; i < SIZE; i++)
508	>	mustEqual(i, q.poll(LONG_DELAY_MS, MILLISECONDS));
509
510	<	t.start();
511	<	Thread.sleep(SMALL_DELAY_MS);
512	<	t.interrupt();
513	<	t.join();
514	<	}
510	>	Thread.currentThread().interrupt();
511	>	try {
512	>	q.poll(randomTimeout(), randomTimeUnit());
513	>	shouldThrow();
514	>	} catch (InterruptedException success) {}
515	>	assertFalse(Thread.interrupted());
516
517	<	/**
518	<	*  timed poll before a delayed offer fails; after offer succeeds;
519	<	*  on interruption throws
520	<	*/
521	<	public void testTimedPollWithOffer() throws InterruptedException {
522	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
523	<	Thread t = new ThreadShouldThrow(InterruptedException.class) {
473	<	public void realRun() throws InterruptedException {
474	<	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
475	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
476	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
477	<	}};
517	>	pleaseInterrupt.countDown();
518	>	try {
519	>	q.poll(LONGER_DELAY_MS, MILLISECONDS);
520	>	shouldThrow();
521	>	} catch (InterruptedException success) {}
522	>	assertFalse(Thread.interrupted());
523	>	}});
524
525	<	t.start();
526	<	Thread.sleep(SMALL_DELAY_MS);
481	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
525	>	await(pleaseInterrupt);
526	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
527		t.interrupt();
528	<	t.join();
528	>	awaitTermination(t);
529	>	checkEmpty(q);
530		}
531
486	–
532		/**
533		* peek returns next element, or null if empty
534		*/
535		public void testPeek() {
536	<	ArrayBlockingQueue q = populatedQueue(SIZE);
536	>	ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
537		for (int i = 0; i < SIZE; ++i) {
538	<	assertEquals(i, ((Integer)q.peek()).intValue());
539	<	q.poll();
538	>	mustEqual(i, q.peek());
539	>	mustEqual(i, q.poll());
540		assertTrue(q.peek() == null ||
541	<	i != ((Integer)q.peek()).intValue());
541	>	!q.peek().equals(i));
542		}
543		assertNull(q.peek());
544		}
#	Line 502 | Line 547 | public class ArrayBlockingQueueTest exte
547		* element returns next element, or throws NSEE if empty
548		*/
549		public void testElement() {
550	<	ArrayBlockingQueue q = populatedQueue(SIZE);
550	>	ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
551		for (int i = 0; i < SIZE; ++i) {
552	<	assertEquals(i, ((Integer)q.element()).intValue());
553	<	q.poll();
552	>	mustEqual(i, q.element());
553	>	mustEqual(i, q.poll());
554		}
555		try {
556		q.element();
#	Line 517 | Line 562 | public class ArrayBlockingQueueTest exte
562		* remove removes next element, or throws NSEE if empty
563		*/
564		public void testRemove() {
565	<	ArrayBlockingQueue q = populatedQueue(SIZE);
565	>	ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
566		for (int i = 0; i < SIZE; ++i) {
567	<	assertEquals(i, ((Integer)q.remove()).intValue());
567	>	mustEqual(i, q.remove());
568		}
569		try {
570		q.remove();
#	Line 528 | Line 573 | public class ArrayBlockingQueueTest exte
573		}
574
575		/**
531	–	* remove(x) removes x and returns true if present
532	–	*/
533	–	public void testRemoveElement() {
534	–	ArrayBlockingQueue q = populatedQueue(SIZE);
535	–	for (int i = 1; i < SIZE; i+=2) {
536	–	assertTrue(q.remove(new Integer(i)));
537	–	}
538	–	for (int i = 0; i < SIZE; i+=2) {
539	–	assertTrue(q.remove(new Integer(i)));
540	–	assertFalse(q.remove(new Integer(i+1)));
541	–	}
542	–	assertTrue(q.isEmpty());
543	–	}
544	–
545	–	/**
576		* contains(x) reports true when elements added but not yet removed
577		*/
578		public void testContains() {
579	<	ArrayBlockingQueue q = populatedQueue(SIZE);
580	<	for (int i = 0; i < SIZE; ++i) {
581	<	assertTrue(q.contains(new Integer(i)));
582	<	q.poll();
583	<	assertFalse(q.contains(new Integer(i)));
579	>	int size = ThreadLocalRandom.current().nextInt(1, SIZE);
580	>	ArrayBlockingQueue<Item> q = populatedQueue(size, size, 2 * size, false);
581	>	assertFalse(q.contains(null));
582	>	for (int i = 0; i < size; ++i) {
583	>	mustContain(q, i);
584	>	mustEqual(i, q.poll());
585	>	mustNotContain(q, i);
586		}
587		}
588
#	Line 558 | Line 590 | public class ArrayBlockingQueueTest exte
590		* clear removes all elements
591		*/
592		public void testClear() {
593	<	ArrayBlockingQueue q = populatedQueue(SIZE);
593	>	int size = ThreadLocalRandom.current().nextInt(1, 5);
594	>	ArrayBlockingQueue<Item> q = populatedQueue(size, size, 2 * size, false);
595	>	int capacity = size + q.remainingCapacity();
596		q.clear();
597		assertTrue(q.isEmpty());
598	<	assertEquals(0, q.size());
599	<	assertEquals(SIZE, q.remainingCapacity());
598	>	mustEqual(0, q.size());
599	>	mustEqual(capacity, q.remainingCapacity());
600		q.add(one);
601		assertFalse(q.isEmpty());
602	<	assertTrue(q.contains(one));
602	>	mustContain(q, one);
603		q.clear();
604		assertTrue(q.isEmpty());
605		}
#	Line 574 | Line 608 | public class ArrayBlockingQueueTest exte
608		* containsAll(c) is true when c contains a subset of elements
609		*/
610		public void testContainsAll() {
611	<	ArrayBlockingQueue q = populatedQueue(SIZE);
612	<	ArrayBlockingQueue p = new ArrayBlockingQueue(SIZE);
611	>	ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
612	>	ArrayBlockingQueue<Item> p = new ArrayBlockingQueue<>(SIZE);
613		for (int i = 0; i < SIZE; ++i) {
614		assertTrue(q.containsAll(p));
615		assertFalse(p.containsAll(q));
616	<	p.add(new Integer(i));
616	>	mustAdd(p, i);
617		}
618		assertTrue(p.containsAll(q));
619		}
#	Line 588 | Line 622 | public class ArrayBlockingQueueTest exte
622		* retainAll(c) retains only those elements of c and reports true if changed
623		*/
624		public void testRetainAll() {
625	<	ArrayBlockingQueue q = populatedQueue(SIZE);
626	<	ArrayBlockingQueue p = populatedQueue(SIZE);
625	>	ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
626	>	ArrayBlockingQueue<Item> p = populatedQueue(SIZE);
627		for (int i = 0; i < SIZE; ++i) {
628		boolean changed = q.retainAll(p);
629		if (i == 0)
#	Line 598 | Line 632 | public class ArrayBlockingQueueTest exte
632		assertTrue(changed);
633
634		assertTrue(q.containsAll(p));
635	<	assertEquals(SIZE-i, q.size());
635	>	mustEqual(SIZE - i, q.size());
636		p.remove();
637		}
638		}
#	Line 608 | Line 642 | public class ArrayBlockingQueueTest exte
642		*/
643		public void testRemoveAll() {
644		for (int i = 1; i < SIZE; ++i) {
645	<	ArrayBlockingQueue q = populatedQueue(SIZE);
646	<	ArrayBlockingQueue p = populatedQueue(i);
645	>	ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
646	>	ArrayBlockingQueue<Item> p = populatedQueue(i);
647		assertTrue(q.removeAll(p));
648	<	assertEquals(SIZE-i, q.size());
648	>	mustEqual(SIZE - i, q.size());
649		for (int j = 0; j < i; ++j) {
650	<	Integer I = (Integer)(p.remove());
651	<	assertFalse(q.contains(I));
650	>	Item x = p.remove();
651	>	mustNotContain(q, x);
652		}
653		}
654		}
655
656	<	/**
657	<	*  toArray contains all elements
658	<	*/
659	<	public void testToArray() throws InterruptedException {
660	<	ArrayBlockingQueue q = populatedQueue(SIZE);
661	<	Object[] o = q.toArray();
662	<	for (int i = 0; i < o.length; i++)
663	<	assertEquals(o[i], q.take());
664	<	}
665	<
666	<	/**
667	<	* toArray(a) contains all elements
668	<	*/
669	<	public void testToArray2() throws InterruptedException {
670	<	ArrayBlockingQueue q = populatedQueue(SIZE);
671	<	Integer[] ints = new Integer[SIZE];
672	<	ints = (Integer[])q.toArray(ints);
673	<	for (int i = 0; i < ints.length; i++)
674	<	assertEquals(ints[i], q.take());
675	<	}
676	<
677	<	/**
678	<	* toArray(null) throws NPE
679	<	*/
680	<	public void testToArray_BadArg() {
656	>	void checkToArray(ArrayBlockingQueue<Item> q) {
657	>	int size = q.size();
658	>	Object[] a1 = q.toArray();
659	>	mustEqual(size, a1.length);
660	>	Item[] a2 = q.toArray(new Item[0]);
661	>	mustEqual(size, a2.length);
662	>	Item[] a3 = q.toArray(new Item[Math.max(0, size - 1)]);
663	>	mustEqual(size, a3.length);
664	>	Item[] a4 = new Item[size];
665	>	assertSame(a4, q.toArray(a4));
666	>	Item[] a5 = new Item[size + 1];
667	>	Arrays.fill(a5, fortytwo);
668	>	assertSame(a5, q.toArray(a5));
669	>	Item[] a6 = new Item[size + 2];
670	>	Arrays.fill(a6, fortytwo);
671	>	assertSame(a6, q.toArray(a6));
672	>	Object[][] as = { a1, a2, a3, a4, a5, a6 };
673	>	for (Object[] a : as) {
674	>	if (a.length > size) assertNull(a[size]);
675	>	if (a.length > size + 1) mustEqual(fortytwo, a[size + 1]);
676	>	}
677	>	Iterator<? extends Item> it = q.iterator();
678	>	Item s = q.peek();
679	>	for (int i = 0; i < size; i++) {
680	>	Item x = (Item) it.next();
681	>	mustEqual(s.value + i, x);
682	>	for (Object[] a : as)
683	>	mustEqual(a[i], x);
684	>	}
685	>	}
686	>
687	>	/**
688	>	* toArray() and toArray(a) contain all elements in FIFO order
689	>	*/
690	>	public void testToArray() {
691	>	final ThreadLocalRandom rnd = ThreadLocalRandom.current();
692	>	final int size = rnd.nextInt(6);
693	>	final int capacity = Math.max(1, size + rnd.nextInt(size + 1));
694	>	ArrayBlockingQueue<Item> q = new ArrayBlockingQueue<>(capacity);
695	>	for (int i = 0; i < size; i++) {
696	>	checkToArray(q);
697	>	mustAdd(q, i);
698	>	}
699	>	// Provoke wraparound
700	>	int added = size * 2;
701	>	for (int i = 0; i < added; i++) {
702	>	checkToArray(q);
703	>	mustEqual(i, q.poll());
704	>	q.add(new Item(size + i));
705	>	}
706	>	for (int i = 0; i < size; i++) {
707	>	checkToArray(q);
708	>	mustEqual((added + i), q.poll());
709	>	}
710	>	}
711	>
712	>	/**
713	>	* toArray(incompatible array type) throws ArrayStoreException
714	>	*/
715	>	@SuppressWarnings("CollectionToArraySafeParameter")
716	>	public void testToArray_incompatibleArrayType() {
717	>	ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
718		try {
719	<	ArrayBlockingQueue q = populatedQueue(SIZE);
649	<	Object o[] = q.toArray(null);
719	>	q.toArray(new String[10]);
720		shouldThrow();
721	<	} catch (NullPointerException success) {}
652	<	}
653	<
654	<	/**
655	<	* toArray with incompatible array type throws CCE
656	<	*/
657	<	public void testToArray1_BadArg() {
721	>	} catch (ArrayStoreException success) {}
722		try {
723	<	ArrayBlockingQueue q = populatedQueue(SIZE);
660	<	Object o[] = q.toArray(new String[10] );
723	>	q.toArray(new String[0]);
724		shouldThrow();
725		} catch (ArrayStoreException success) {}
726		}
727
665	–
728		/**
729		* iterator iterates through all elements
730		*/
731		public void testIterator() throws InterruptedException {
732	<	ArrayBlockingQueue q = populatedQueue(SIZE);
733	<	Iterator it = q.iterator();
734	<	while (it.hasNext()) {
735	<	assertEquals(it.next(), q.take());
736	<	}
732	>	ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
733	>	Iterator<? extends Item> it = q.iterator();
734	>	int i;
735	>	for (i = 0; it.hasNext(); i++)
736	>	mustContain(q, it.next());
737	>	mustEqual(i, SIZE);
738	>	assertIteratorExhausted(it);
739	>
740	>	it = q.iterator();
741	>	for (i = 0; it.hasNext(); i++)
742	>	mustEqual(it.next(), q.take());
743	>	mustEqual(i, SIZE);
744	>	assertIteratorExhausted(it);
745	>	}
746	>
747	>	/**
748	>	* iterator of empty collection has no elements
749	>	*/
750	>	public void testEmptyIterator() {
751	>	assertIteratorExhausted(new ArrayBlockingQueue<>(SIZE).iterator());
752		}
753
754		/**
755		* iterator.remove removes current element
756		*/
757	<	public void testIteratorRemove () {
758	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
757	>	public void testIteratorRemove() {
758	>	final ArrayBlockingQueue<Item> q = new ArrayBlockingQueue<>(3);
759		q.add(two);
760		q.add(one);
761		q.add(three);
762
763	<	Iterator it = q.iterator();
763	>	Iterator<? extends Item> it = q.iterator();
764		it.next();
765		it.remove();
766
767		it = q.iterator();
768	<	assertEquals(it.next(), one);
769	<	assertEquals(it.next(), three);
768	>	assertSame(it.next(), one);
769	>	assertSame(it.next(), three);
770		assertFalse(it.hasNext());
771		}
772
#	Line 697 | Line 774 | public class ArrayBlockingQueueTest exte
774		* iterator ordering is FIFO
775		*/
776		public void testIteratorOrdering() {
777	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
777	>	final ArrayBlockingQueue<Item> q = new ArrayBlockingQueue<>(3);
778		q.add(one);
779		q.add(two);
780		q.add(three);
#	Line 705 | Line 782 | public class ArrayBlockingQueueTest exte
782		assertEquals("queue should be full", 0, q.remainingCapacity());
783
784		int k = 0;
785	<	for (Iterator it = q.iterator(); it.hasNext();) {
786	<	int i = ((Integer)(it.next())).intValue();
710	<	assertEquals(++k, i);
785	>	for (Iterator<? extends Item> it = q.iterator(); it.hasNext();) {
786	>	mustEqual(++k, it.next());
787		}
788	<	assertEquals(3, k);
788	>	mustEqual(3, k);
789		}
790
791		/**
792		* Modifications do not cause iterators to fail
793		*/
794	<	public void testWeaklyConsistentIteration () {
795	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(3);
794	>	public void testWeaklyConsistentIteration() {
795	>	final ArrayBlockingQueue<Item> q = new ArrayBlockingQueue<>(3);
796		q.add(one);
797		q.add(two);
798		q.add(three);
799	<	for (Iterator it = q.iterator(); it.hasNext();) {
799	>	for (Iterator<? extends Item> it = q.iterator(); it.hasNext();) {
800		q.remove();
801		it.next();
802		}
803	<	assertEquals(0, q.size());
803	>	mustEqual(0, q.size());
804		}
805
730	–
806		/**
807		* toString contains toStrings of elements
808		*/
809		public void testToString() {
810	<	ArrayBlockingQueue q = populatedQueue(SIZE);
810	>	ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
811		String s = q.toString();
812		for (int i = 0; i < SIZE; ++i) {
813	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
813	>	assertTrue(s.contains(String.valueOf(i)));
814		}
815		}
816
742	–
817		/**
818		* offer transfers elements across Executor tasks
819		*/
820		public void testOfferInExecutor() {
821	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
821	>	final ArrayBlockingQueue<Item> q = new ArrayBlockingQueue<>(2);
822		q.add(one);
823		q.add(two);
824	<	ExecutorService executor = Executors.newFixedThreadPool(2);
825	<	executor.execute(new CheckedRunnable() {
826	<	public void realRun() throws InterruptedException {
827	<	threadAssertFalse(q.offer(three));
828	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, MILLISECONDS));
829	<	threadAssertEquals(0, q.remainingCapacity());
830	<	}});
831	<
832	<	executor.execute(new CheckedRunnable() {
833	<	public void realRun() throws InterruptedException {
834	<	Thread.sleep(SMALL_DELAY_MS);
835	<	threadAssertEquals(one, q.take());
836	<	}});
837	<
838	<	joinPool(executor);
839	<
824	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
825	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
826	>	try (PoolCleaner cleaner = cleaner(executor)) {
827	>	executor.execute(new CheckedRunnable() {
828	>	public void realRun() throws InterruptedException {
829	>	assertFalse(q.offer(three));
830	>	threadsStarted.await();
831	>	assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS));
832	>	mustEqual(0, q.remainingCapacity());
833	>	}});
834	>
835	>	executor.execute(new CheckedRunnable() {
836	>	public void realRun() throws InterruptedException {
837	>	threadsStarted.await();
838	>	mustEqual(0, q.remainingCapacity());
839	>	assertSame(one, q.take());
840	>	}});
841	>	}
842		}
843
844		/**
845	<	* poll retrieves elements across Executor threads
845	>	* timed poll retrieves elements across Executor threads
846		*/
847		public void testPollInExecutor() {
848	<	final ArrayBlockingQueue q = new ArrayBlockingQueue(2);
849	<	ExecutorService executor = Executors.newFixedThreadPool(2);
850	<	executor.execute(new CheckedRunnable() {
851	<	public void realRun() throws InterruptedException {
852	<	threadAssertNull(q.poll());
853	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
854	<	threadAssertTrue(q.isEmpty());
855	<	}});
856	<
857	<	executor.execute(new CheckedRunnable() {
858	<	public void realRun() throws InterruptedException {
859	<	Thread.sleep(SMALL_DELAY_MS);
860	<	q.put(one);
861	<	}});
862	<
863	<	joinPool(executor);
848	>	final ArrayBlockingQueue<Item> q = new ArrayBlockingQueue<>(2);
849	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
850	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
851	>	try (PoolCleaner cleaner = cleaner(executor)) {
852	>	executor.execute(new CheckedRunnable() {
853	>	public void realRun() throws InterruptedException {
854	>	assertNull(q.poll());
855	>	threadsStarted.await();
856	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
857	>	checkEmpty(q);
858	>	}});
859	>
860	>	executor.execute(new CheckedRunnable() {
861	>	public void realRun() throws InterruptedException {
862	>	threadsStarted.await();
863	>	q.put(one);
864	>	}});
865	>	}
866		}
867
868		/**
869	<	* A deserialized serialized queue has same elements in same order
869	>	* A deserialized/reserialized queue has same elements in same order
870		*/
871		public void testSerialization() throws Exception {
872	<	ArrayBlockingQueue q = populatedQueue(SIZE);
873	<
796	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
797	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
798	<	out.writeObject(q);
799	<	out.close();
800	<
801	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
802	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
803	<	ArrayBlockingQueue r = (ArrayBlockingQueue)in.readObject();
804	<	assertEquals(q.size(), r.size());
805	<	while (!q.isEmpty())
806	<	assertEquals(q.remove(), r.remove());
807	<	}
808	<
809	<	/**
810	<	* drainTo(null) throws NPE
811	<	*/
812	<	public void testDrainToNull() {
813	<	ArrayBlockingQueue q = populatedQueue(SIZE);
814	<	try {
815	<	q.drainTo(null);
816	<	shouldThrow();
817	<	} catch (NullPointerException success) {}
818	<	}
872	>	Queue<Item> x = populatedQueue(SIZE);
873	>	Queue<Item> y = serialClone(x);
874
875	<	/**
876	<	* drainTo(this) throws IAE
877	<	*/
878	<	public void testDrainToSelf() {
879	<	ArrayBlockingQueue q = populatedQueue(SIZE);
880	<	try {
881	<	q.drainTo(q);
882	<	shouldThrow();
883	<	} catch (IllegalArgumentException success) {}
875	>	assertNotSame(x, y);
876	>	mustEqual(x.size(), y.size());
877	>	mustEqual(x.toString(), y.toString());
878	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
879	>	while (!x.isEmpty()) {
880	>	assertFalse(y.isEmpty());
881	>	mustEqual(x.remove(), y.remove());
882	>	}
883	>	assertTrue(y.isEmpty());
884		}
885
886		/**
887		* drainTo(c) empties queue into another collection c
888		*/
889		public void testDrainTo() {
890	<	ArrayBlockingQueue q = populatedQueue(SIZE);
891	<	ArrayList l = new ArrayList();
890	>	ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
891	>	ArrayList<Item> l = new ArrayList<>();
892		q.drainTo(l);
893	<	assertEquals(q.size(), 0);
894	<	assertEquals(l.size(), SIZE);
893	>	mustEqual(0, q.size());
894	>	mustEqual(SIZE, l.size());
895		for (int i = 0; i < SIZE; ++i)
896	<	assertEquals(l.get(i), new Integer(i));
896	>	mustEqual(l.get(i), i);
897		q.add(zero);
898		q.add(one);
899		assertFalse(q.isEmpty());
900	<	assertTrue(q.contains(zero));
901	<	assertTrue(q.contains(one));
900	>	mustContain(q, zero);
901	>	mustContain(q, one);
902		l.clear();
903		q.drainTo(l);
904	<	assertEquals(q.size(), 0);
905	<	assertEquals(l.size(), 2);
904	>	mustEqual(0, q.size());
905	>	mustEqual(2, l.size());
906		for (int i = 0; i < 2; ++i)
907	<	assertEquals(l.get(i), new Integer(i));
907	>	mustEqual(l.get(i), i);
908		}
909
910		/**
911		* drainTo empties full queue, unblocking a waiting put.
912		*/
913		public void testDrainToWithActivePut() throws InterruptedException {
914	<	final ArrayBlockingQueue q = populatedQueue(SIZE);
914	>	final ArrayBlockingQueue<Item> q = populatedQueue(SIZE);
915		Thread t = new Thread(new CheckedRunnable() {
916		public void realRun() throws InterruptedException {
917	<	q.put(new Integer(SIZE+1));
917	>	q.put(new Item(SIZE + 1));
918		}});
919
920		t.start();
921	<	ArrayList l = new ArrayList();
921	>	ArrayList<Item> l = new ArrayList<>();
922		q.drainTo(l);
923		assertTrue(l.size() >= SIZE);
924		for (int i = 0; i < SIZE; ++i)
925	<	assertEquals(l.get(i), new Integer(i));
925	>	mustEqual(l.get(i), i);
926		t.join();
927		assertTrue(q.size() + l.size() >= SIZE);
928		}
929
930		/**
931	<	* drainTo(null, n) throws NPE
877	<	*/
878	<	public void testDrainToNullN() {
879	<	ArrayBlockingQueue q = populatedQueue(SIZE);
880	<	try {
881	<	q.drainTo(null, 0);
882	<	shouldThrow();
883	<	} catch (NullPointerException success) {}
884	<	}
885	<
886	<	/**
887	<	* drainTo(this, n) throws IAE
888	<	*/
889	<	public void testDrainToSelfN() {
890	<	ArrayBlockingQueue q = populatedQueue(SIZE);
891	<	try {
892	<	q.drainTo(q, 0);
893	<	shouldThrow();
894	<	} catch (IllegalArgumentException success) {}
895	<	}
896	<
897	<	/**
898	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
931	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
932		*/
933		public void testDrainToN() {
934	<	ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE*2);
934	>	ArrayBlockingQueue<Item> q = new ArrayBlockingQueue<>(SIZE * 2);
935		for (int i = 0; i < SIZE + 2; ++i) {
936		for (int j = 0; j < SIZE; j++)
937	<	assertTrue(q.offer(new Integer(j)));
938	<	ArrayList l = new ArrayList();
937	>	mustOffer(q, j);
938	>	ArrayList<Item> l = new ArrayList<>();
939		q.drainTo(l, i);
940	<	int k = (i < SIZE)? i : SIZE;
941	<	assertEquals(l.size(), k);
942	<	assertEquals(q.size(), SIZE-k);
940	>	int k = (i < SIZE) ? i : SIZE;
941	>	mustEqual(k, l.size());
942	>	mustEqual(SIZE - k, q.size());
943		for (int j = 0; j < k; ++j)
944	<	assertEquals(l.get(j), new Integer(j));
945	<	while (q.poll() != null) ;
944	>	mustEqual(l.get(j), j);
945	>	do {} while (q.poll() != null);
946		}
947		}
948
949	+	/**
950	+	* remove(null), contains(null) always return false
951	+	*/
952	+	public void testNeverContainsNull() {
953	+	Collection<?>[] qs = {
954	+	populatedQueue(0, 1, 10, false),
955	+	populatedQueue(2, 2, 10, true),
956	+	};
957	+
958	+	for (Collection<?> q : qs) {
959	+	assertFalse(q.contains(null));
960	+	assertFalse(q.remove(null));
961	+	}
962	+	}
963		}

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