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

Comparing jsr166/src/test/tck/PriorityBlockingQueueTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 00:31:57 2003 UTC vs.
Revision 1.53 by jsr166, Sun Nov 23 22:27:06 2014 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.*;
10	>	import java.util.Arrays;
11	>	import java.util.ArrayList;
12	>	import java.util.Collection;
13	>	import java.util.Comparator;
14	>	import java.util.Iterator;
15	>	import java.util.NoSuchElementException;
16	>	import java.util.Queue;
17	>	import java.util.concurrent.PriorityBlockingQueue;
18	>	import java.util.concurrent.BlockingQueue;
19	>	import java.util.concurrent.CountDownLatch;
20	>	import java.util.concurrent.Executors;
21	>	import java.util.concurrent.ExecutorService;
22	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
23
24		public class PriorityBlockingQueueTest extends JSR166TestCase {
25	+
26	+	public static class Generic extends BlockingQueueTest {
27	+	protected BlockingQueue emptyCollection() {
28	+	return new PriorityBlockingQueue();
29	+	}
30	+	}
31	+
32	+	public static class InitialCapacity extends BlockingQueueTest {
33	+	protected BlockingQueue emptyCollection() {
34	+	return new PriorityBlockingQueue(SIZE);
35	+	}
36	+	}
37	+
38		public static void main(String[] args) {
39	<	junit.textui.TestRunner.run (suite());
39	>	junit.textui.TestRunner.run(suite());
40		}
41
42		public static Test suite() {
43	<	return new TestSuite(PriorityBlockingQueueTest.class);
43	>	return newTestSuite(PriorityBlockingQueueTest.class,
44	>	new Generic().testSuite(),
45	>	new InitialCapacity().testSuite());
46		}
47
48		private static final int NOCAP = Integer.MAX_VALUE;
49
50		/** Sample Comparator */
51	<	static class MyReverseComparator implements Comparator {
51	>	static class MyReverseComparator implements Comparator {
52		public int compare(Object x, Object y) {
53	<	int i = ((Integer)x).intValue();
28	<	int j = ((Integer)y).intValue();
29	<	if (i < j) return 1;
30	<	if (i > j) return -1;
31	<	return 0;
53	>	return ((Comparable)y).compareTo(x);
54		}
55		}
56
35	–
57		/**
58	<	* Create a queue of given size containing consecutive
58	>	* Returns a new queue of given size containing consecutive
59		* Integers 0 ... n.
60		*/
61	<	private PriorityBlockingQueue populatedQueue(int n) {
62	<	PriorityBlockingQueue q = new PriorityBlockingQueue(n);
61	>	private PriorityBlockingQueue<Integer> populatedQueue(int n) {
62	>	PriorityBlockingQueue<Integer> q =
63	>	new PriorityBlockingQueue<Integer>(n);
64		assertTrue(q.isEmpty());
65	<	for(int i = n-1; i >= 0; i-=2)
66	<	assertTrue(q.offer(new Integer(i)));
67	<	for(int i = (n & 1); i < n; i+=2)
68	<	assertTrue(q.offer(new Integer(i)));
65	>	for (int i = n-1; i >= 0; i-=2)
66	>	assertTrue(q.offer(new Integer(i)));
67	>	for (int i = (n & 1); i < n; i+=2)
68	>	assertTrue(q.offer(new Integer(i)));
69		assertFalse(q.isEmpty());
70		assertEquals(NOCAP, q.remainingCapacity());
71	<	assertEquals(n, q.size());
71	>	assertEquals(n, q.size());
72		return q;
73		}
74	<
75	<	public void testConstructor1(){
74	>
75	>	/**
76	>	* A new queue has unbounded capacity
77	>	*/
78	>	public void testConstructor1() {
79		assertEquals(NOCAP, new PriorityBlockingQueue(SIZE).remainingCapacity());
80		}
81
82	<	public void testConstructor2(){
82	>	/**
83	>	* Constructor throws IAE if capacity argument nonpositive
84	>	*/
85	>	public void testConstructor2() {
86		try {
87	<	PriorityBlockingQueue q = new PriorityBlockingQueue(0);
88	<	fail("Cannot make zero-sized");
89	<	}
62	<	catch (IllegalArgumentException success) {}
87	>	new PriorityBlockingQueue(0);
88	>	shouldThrow();
89	>	} catch (IllegalArgumentException success) {}
90		}
91
92	<	public void testConstructor3(){
93	<
92	>	/**
93	>	* Initializing from null Collection throws NPE
94	>	*/
95	>	public void testConstructor3() {
96		try {
97	<	PriorityBlockingQueue q = new PriorityBlockingQueue(null);
98	<	fail("Cannot make from null collection");
99	<	}
71	<	catch (NullPointerException success) {}
97	>	new PriorityBlockingQueue(null);
98	>	shouldThrow();
99	>	} catch (NullPointerException success) {}
100		}
101
102	<	public void testConstructor4(){
102	>	/**
103	>	* Initializing from Collection of null elements throws NPE
104	>	*/
105	>	public void testConstructor4() {
106	>	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
107		try {
108	<	Integer[] ints = new Integer[SIZE];
109	<	PriorityBlockingQueue q = new PriorityBlockingQueue(Arrays.asList(ints));
110	<	fail("Cannot make with null elements");
79	<	}
80	<	catch (NullPointerException success) {}
108	>	new PriorityBlockingQueue(elements);
109	>	shouldThrow();
110	>	} catch (NullPointerException success) {}
111		}
112
113	<	public void testConstructor5(){
114	<	try {
115	<	Integer[] ints = new Integer[SIZE];
116	<	for (int i = 0; i < SIZE-1; ++i)
117	<	ints[i] = new Integer(i);
118	<	PriorityBlockingQueue q = new PriorityBlockingQueue(Arrays.asList(ints));
119	<	fail("Cannot make with null elements");
120	<	}
121	<	catch (NullPointerException success) {}
113	>	/**
114	>	* Initializing from Collection with some null elements throws NPE
115	>	*/
116	>	public void testConstructor5() {
117	>	Integer[] ints = new Integer[SIZE];
118	>	for (int i = 0; i < SIZE-1; ++i)
119	>	ints[i] = i;
120	>	Collection<Integer> elements = Arrays.asList(ints);
121	>	try {
122	>	new PriorityBlockingQueue(elements);
123	>	shouldThrow();
124	>	} catch (NullPointerException success) {}
125		}
126
127	<	public void testConstructor6(){
128	<	try {
129	<	Integer[] ints = new Integer[SIZE];
130	<	for (int i = 0; i < SIZE; ++i)
131	<	ints[i] = new Integer(i);
132	<	PriorityBlockingQueue q = new PriorityBlockingQueue(Arrays.asList(ints));
133	<	for (int i = 0; i < SIZE; ++i)
134	<	assertEquals(ints[i], q.poll());
135	<	}
136	<	finally {}
127	>	/**
128	>	* Queue contains all elements of collection used to initialize
129	>	*/
130	>	public void testConstructor6() {
131	>	Integer[] ints = new Integer[SIZE];
132	>	for (int i = 0; i < SIZE; ++i)
133	>	ints[i] = i;
134	>	PriorityBlockingQueue q = new PriorityBlockingQueue(Arrays.asList(ints));
135	>	for (int i = 0; i < SIZE; ++i)
136	>	assertEquals(ints[i], q.poll());
137		}
138
139	<	public void testConstructor7(){
140	<	try {
141	<	MyReverseComparator cmp = new MyReverseComparator();
142	<	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE, cmp);
143	<	assertEquals(cmp, q.comparator());
144	<	Integer[] ints = new Integer[SIZE];
145	<	for (int i = 0; i < SIZE; ++i)
146	<	ints[i] = new Integer(i);
147	<	q.addAll(Arrays.asList(ints));
148	<	for (int i = SIZE-1; i >= 0; --i)
149	<	assertEquals(ints[i], q.poll());
150	<	}
151	<	finally {}
139	>	/**
140	>	* The comparator used in constructor is used
141	>	*/
142	>	public void testConstructor7() {
143	>	MyReverseComparator cmp = new MyReverseComparator();
144	>	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE, cmp);
145	>	assertEquals(cmp, q.comparator());
146	>	Integer[] ints = new Integer[SIZE];
147	>	for (int i = 0; i < SIZE; ++i)
148	>	ints[i] = new Integer(i);
149	>	q.addAll(Arrays.asList(ints));
150	>	for (int i = SIZE-1; i >= 0; --i)
151	>	assertEquals(ints[i], q.poll());
152		}
153
154	+	/**
155	+	* isEmpty is true before add, false after
156	+	*/
157		public void testEmpty() {
158		PriorityBlockingQueue q = new PriorityBlockingQueue(2);
159		assertTrue(q.isEmpty());
160		assertEquals(NOCAP, q.remainingCapacity());
161	<	q.add(new Integer(1));
161	>	q.add(one);
162		assertFalse(q.isEmpty());
163	<	q.add(new Integer(2));
163	>	q.add(two);
164		q.remove();
165		q.remove();
166		assertTrue(q.isEmpty());
167		}
168
169	<	public void testRemainingCapacity(){
169	>	/**
170	>	* remainingCapacity does not change when elements added or removed,
171	>	* but size does
172	>	*/
173	>	public void testRemainingCapacity() {
174		PriorityBlockingQueue q = populatedQueue(SIZE);
175		for (int i = 0; i < SIZE; ++i) {
176		assertEquals(NOCAP, q.remainingCapacity());
#	Line 144 | Line 184 | public class PriorityBlockingQueueTest e
184		}
185		}
186
187	<	public void testOfferNull(){
188	<	try {
189	<	PriorityBlockingQueue q = new PriorityBlockingQueue(1);
150	<	q.offer(null);
151	<	fail("should throw NPE");
152	<	} catch (NullPointerException success) { }
153	<	}
154	<
187	>	/**
188	>	* Offer of comparable element succeeds
189	>	*/
190		public void testOffer() {
191		PriorityBlockingQueue q = new PriorityBlockingQueue(1);
192	<	assertTrue(q.offer(new Integer(0)));
193	<	assertTrue(q.offer(new Integer(1)));
192	>	assertTrue(q.offer(zero));
193	>	assertTrue(q.offer(one));
194		}
195
196	+	/**
197	+	* Offer of non-Comparable throws CCE
198	+	*/
199		public void testOfferNonComparable() {
200		try {
201		PriorityBlockingQueue q = new PriorityBlockingQueue(1);
202		q.offer(new Object());
203		q.offer(new Object());
204		q.offer(new Object());
205	<	fail("should throw CCE");
206	<	}
169	<	catch(ClassCastException success) {}
205	>	shouldThrow();
206	>	} catch (ClassCastException success) {}
207		}
208
209	<	public void testAdd(){
209	>	/**
210	>	* add of comparable succeeds
211	>	*/
212	>	public void testAdd() {
213		PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
214		for (int i = 0; i < SIZE; ++i) {
215		assertEquals(i, q.size());
#	Line 177 | Line 217 | public class PriorityBlockingQueueTest e
217		}
218		}
219
220	<	public void testAddAll1(){
221	<	try {
222	<	PriorityBlockingQueue q = new PriorityBlockingQueue(1);
223	<	q.addAll(null);
184	<	fail("Cannot add null collection");
185	<	}
186	<	catch (NullPointerException success) {}
187	<	}
188	<	public void testAddAll2(){
220	>	/**
221	>	* addAll(this) throws IAE
222	>	*/
223	>	public void testAddAllSelf() {
224		try {
225	<	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
226	<	Integer[] ints = new Integer[SIZE];
227	<	q.addAll(Arrays.asList(ints));
228	<	fail("Cannot add null elements");
194	<	}
195	<	catch (NullPointerException success) {}
225	>	PriorityBlockingQueue q = populatedQueue(SIZE);
226	>	q.addAll(q);
227	>	shouldThrow();
228	>	} catch (IllegalArgumentException success) {}
229		}
230	<	public void testAddAll3(){
230	>
231	>	/**
232	>	* addAll of a collection with any null elements throws NPE after
233	>	* possibly adding some elements
234	>	*/
235	>	public void testAddAll3() {
236		try {
237		PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
238		Integer[] ints = new Integer[SIZE];
239		for (int i = 0; i < SIZE-1; ++i)
240		ints[i] = new Integer(i);
241		q.addAll(Arrays.asList(ints));
242	<	fail("Cannot add null elements");
243	<	}
206	<	catch (NullPointerException success) {}
242	>	shouldThrow();
243	>	} catch (NullPointerException success) {}
244		}
245
246	<	public void testAddAll5(){
247	<	try {
248	<	Integer[] empty = new Integer[0];
249	<	Integer[] ints = new Integer[SIZE];
250	<	for (int i = SIZE-1; i >= 0; --i)
251	<	ints[i] = new Integer(i);
252	<	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
253	<	assertFalse(q.addAll(Arrays.asList(empty)));
254	<	assertTrue(q.addAll(Arrays.asList(ints)));
255	<	for (int i = 0; i < SIZE; ++i)
256	<	assertEquals(ints[i], q.poll());
257	<	}
258	<	finally {}
246	>	/**
247	>	* Queue contains all elements of successful addAll
248	>	*/
249	>	public void testAddAll5() {
250	>	Integer[] empty = new Integer[0];
251	>	Integer[] ints = new Integer[SIZE];
252	>	for (int i = SIZE-1; i >= 0; --i)
253	>	ints[i] = new Integer(i);
254	>	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
255	>	assertFalse(q.addAll(Arrays.asList(empty)));
256	>	assertTrue(q.addAll(Arrays.asList(ints)));
257	>	for (int i = 0; i < SIZE; ++i)
258	>	assertEquals(ints[i], q.poll());
259		}
260
261	<	public void testPutNull() {
262	<	try {
263	<	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
264	<	q.put(null);
265	<	fail("put should throw NPE");
266	<	}
267	<	catch (NullPointerException success){
268	<	}
269	<	}
233	<
234	<	public void testPut() {
235	<	try {
236	<	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
237	<	for (int i = 0; i < SIZE; ++i) {
238	<	Integer I = new Integer(i);
239	<	q.put(I);
240	<	assertTrue(q.contains(I));
241	<	}
242	<	assertEquals(SIZE, q.size());
243	<	}
244	<	finally {
261	>	/**
262	>	* all elements successfully put are contained
263	>	*/
264	>	public void testPut() {
265	>	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
266	>	for (int i = 0; i < SIZE; ++i) {
267	>	Integer I = new Integer(i);
268	>	q.put(I);
269	>	assertTrue(q.contains(I));
270		}
271	+	assertEquals(SIZE, q.size());
272		}
273
274	<	public void testPutWithTake() {
274	>	/**
275	>	* put doesn't block waiting for take
276	>	*/
277	>	public void testPutWithTake() throws InterruptedException {
278		final PriorityBlockingQueue q = new PriorityBlockingQueue(2);
279	<	Thread t = new Thread(new Runnable() {
280	<	public void run(){
281	<	int added = 0;
282	<	try {
283	<	q.put(new Integer(0));
284	<	++added;
285	<	q.put(new Integer(0));
286	<	++added;
287	<	q.put(new Integer(0));
288	<	++added;
260	<	q.put(new Integer(0));
261	<	++added;
262	<	threadAssertTrue(added == 4);
263	<	} finally {
264	<	}
265	<	}
266	<	});
267	<	try {
268	<	t.start();
269	<	Thread.sleep(SHORT_DELAY_MS);
270	<	q.take();
271	<	t.interrupt();
272	<	t.join();
273	<	} catch (Exception e){
274	<	fail("Unexpected exception");
275	<	}
279	>	final int size = 4;
280	>	Thread t = newStartedThread(new CheckedRunnable() {
281	>	public void realRun() {
282	>	for (int i = 0; i < size; i++)
283	>	q.put(new Integer(0));
284	>	}});
285	>
286	>	awaitTermination(t);
287	>	assertEquals(size, q.size());
288	>	q.take();
289		}
290
291	<	public void testTimedOffer() {
291	>	/**
292	>	* timed offer does not time out
293	>	*/
294	>	public void testTimedOffer() throws InterruptedException {
295		final PriorityBlockingQueue q = new PriorityBlockingQueue(2);
296	<	Thread t = new Thread(new Runnable() {
297	<	public void run(){
298	<	try {
299	<	q.put(new Integer(0));
300	<	q.put(new Integer(0));
301	<	threadAssertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
302	<	threadAssertTrue(q.offer(new Integer(0), LONG_DELAY_MS, TimeUnit.MILLISECONDS));
287	<	} finally { }
288	<	}
289	<	});
290	<
291	<	try {
292	<	t.start();
293	<	Thread.sleep(SMALL_DELAY_MS);
294	<	t.interrupt();
295	<	t.join();
296	<	} catch (Exception e){
297	<	fail("Unexpected exception");
298	<	}
299	<	}
296	>	Thread t = newStartedThread(new CheckedRunnable() {
297	>	public void realRun() {
298	>	q.put(new Integer(0));
299	>	q.put(new Integer(0));
300	>	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, MILLISECONDS));
301	>	assertTrue(q.offer(new Integer(0), LONG_DELAY_MS, MILLISECONDS));
302	>	}});
303
304	<	public void testTake(){
302	<	try {
303	<	PriorityBlockingQueue q = populatedQueue(SIZE);
304	<	for (int i = 0; i < SIZE; ++i) {
305	<	assertEquals(i, ((Integer)q.take()).intValue());
306	<	}
307	<	} catch (InterruptedException e){
308	<	fail("Unexpected exception");
309	<	}
304	>	awaitTermination(t);
305		}
306
307	<	public void testTakeFromEmpty() {
308	<	final PriorityBlockingQueue q = new PriorityBlockingQueue(2);
309	<	Thread t = new Thread(new Runnable() {
310	<	public void run(){
311	<	try {
312	<	q.take();
313	<	threadFail("Should block");
319	<	} catch (InterruptedException success){ }
320	<	}
321	<	});
322	<	try {
323	<	t.start();
324	<	Thread.sleep(SHORT_DELAY_MS);
325	<	t.interrupt();
326	<	t.join();
327	<	} catch (Exception e){
328	<	fail("Unexpected exception");
307	>	/**
308	>	* take retrieves elements in priority order
309	>	*/
310	>	public void testTake() throws InterruptedException {
311	>	PriorityBlockingQueue q = populatedQueue(SIZE);
312	>	for (int i = 0; i < SIZE; ++i) {
313	>	assertEquals(i, q.take());
314		}
315		}
316
317	<	public void testBlockingTake(){
318	<	Thread t = new Thread(new Runnable() {
319	<	public void run() {
320	<	try {
321	<	PriorityBlockingQueue q = populatedQueue(SIZE);
322	<	for (int i = 0; i < SIZE; ++i) {
323	<	threadAssertEquals(i, ((Integer)q.take()).intValue());
324	<	}
325	<	q.take();
326	<	threadFail("take should block");
327	<	} catch (InterruptedException success){
343	<	}
344	<	}});
345	<	t.start();
346	<	try {
347	<	Thread.sleep(SHORT_DELAY_MS);
348	<	t.interrupt();
349	<	t.join();
350	<	}
351	<	catch (InterruptedException ie) {
352	<	fail("Unexpected exception");
353	<	}
354	<	}
317	>	/**
318	>	* Take removes existing elements until empty, then blocks interruptibly
319	>	*/
320	>	public void testBlockingTake() throws InterruptedException {
321	>	final PriorityBlockingQueue q = populatedQueue(SIZE);
322	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
323	>	Thread t = newStartedThread(new CheckedRunnable() {
324	>	public void realRun() throws InterruptedException {
325	>	for (int i = 0; i < SIZE; ++i) {
326	>	assertEquals(i, q.take());
327	>	}
328
329	+	Thread.currentThread().interrupt();
330	+	try {
331	+	q.take();
332	+	shouldThrow();
333	+	} catch (InterruptedException success) {}
334	+	assertFalse(Thread.interrupted());
335
336	<	public void testPoll(){
336	>	pleaseInterrupt.countDown();
337	>	try {
338	>	q.take();
339	>	shouldThrow();
340	>	} catch (InterruptedException success) {}
341	>	assertFalse(Thread.interrupted());
342	>	}});
343	>
344	>	await(pleaseInterrupt);
345	>	assertThreadStaysAlive(t);
346	>	t.interrupt();
347	>	awaitTermination(t);
348	>	}
349	>
350	>	/**
351	>	* poll succeeds unless empty
352	>	*/
353	>	public void testPoll() {
354		PriorityBlockingQueue q = populatedQueue(SIZE);
355		for (int i = 0; i < SIZE; ++i) {
356	<	assertEquals(i, ((Integer)q.poll()).intValue());
356	>	assertEquals(i, q.poll());
357		}
358	<	assertNull(q.poll());
358	>	assertNull(q.poll());
359		}
360
361	<	public void testTimedPoll0() {
362	<	try {
363	<	PriorityBlockingQueue q = populatedQueue(SIZE);
364	<	for (int i = 0; i < SIZE; ++i) {
365	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
366	<	}
367	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
368	<	} catch (InterruptedException e){
369	<	fail("Unexpected exception");
374	<	}
361	>	/**
362	>	* timed poll with zero timeout succeeds when non-empty, else times out
363	>	*/
364	>	public void testTimedPoll0() throws InterruptedException {
365	>	PriorityBlockingQueue q = populatedQueue(SIZE);
366	>	for (int i = 0; i < SIZE; ++i) {
367	>	assertEquals(i, q.poll(0, MILLISECONDS));
368	>	}
369	>	assertNull(q.poll(0, MILLISECONDS));
370		}
371
372	<	public void testTimedPoll() {
373	<	try {
374	<	PriorityBlockingQueue q = populatedQueue(SIZE);
375	<	for (int i = 0; i < SIZE; ++i) {
376	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
377	<	}
378	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
379	<	} catch (InterruptedException e){
380	<	fail("Unexpected exception");
381	<	}
382	<	}
383	<
384	<	public void testInterruptedTimedPoll(){
385	<	Thread t = new Thread(new Runnable() {
391	<	public void run() {
392	<	try {
393	<	PriorityBlockingQueue q = populatedQueue(SIZE);
394	<	for (int i = 0; i < SIZE; ++i) {
395	<	threadAssertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
396	<	}
397	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
398	<	} catch (InterruptedException success){
399	<	}
400	<	}});
401	<	t.start();
402	<	try {
403	<	Thread.sleep(SHORT_DELAY_MS);
404	<	t.interrupt();
405	<	t.join();
406	<	}
407	<	catch (InterruptedException ie) {
408	<	fail("Unexpected exception");
409	<	}
372	>	/**
373	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
374	>	*/
375	>	public void testTimedPoll() throws InterruptedException {
376	>	PriorityBlockingQueue<Integer> q = populatedQueue(SIZE);
377	>	for (int i = 0; i < SIZE; ++i) {
378	>	long startTime = System.nanoTime();
379	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
380	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
381	>	}
382	>	long startTime = System.nanoTime();
383	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
384	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
385	>	checkEmpty(q);
386		}
387
388	<	public void testTimedPollWithOffer(){
389	<	final PriorityBlockingQueue q = new PriorityBlockingQueue(2);
390	<	Thread t = new Thread(new Runnable() {
391	<	public void run(){
392	<	try {
393	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
394	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
395	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
396	<	threadFail("Should block");
397	<	} catch (InterruptedException success) { }
388	>	/**
389	>	* Interrupted timed poll throws InterruptedException instead of
390	>	* returning timeout status
391	>	*/
392	>	public void testInterruptedTimedPoll() throws InterruptedException {
393	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
394	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
395	>	Thread t = newStartedThread(new CheckedRunnable() {
396	>	public void realRun() throws InterruptedException {
397	>	for (int i = 0; i < SIZE; ++i) {
398	>	long t0 = System.nanoTime();
399	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
400	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
401		}
402	<	});
403	<	try {
404	<	t.start();
405	<	Thread.sleep(SMALL_DELAY_MS);
406	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
407	<	t.interrupt();
408	<	t.join();
409	<	} catch (Exception e){
410	<	fail("Unexpected exception");
432	<	}
433	<	}
402	>	long t0 = System.nanoTime();
403	>	aboutToWait.countDown();
404	>	try {
405	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
406	>	shouldThrow();
407	>	} catch (InterruptedException success) {
408	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
409	>	}
410	>	}});
411
412	+	aboutToWait.await();
413	+	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
414	+	t.interrupt();
415	+	awaitTermination(t, MEDIUM_DELAY_MS);
416	+	}
417
418	<	public void testPeek(){
418	>	/**
419	>	* peek returns next element, or null if empty
420	>	*/
421	>	public void testPeek() {
422		PriorityBlockingQueue q = populatedQueue(SIZE);
423		for (int i = 0; i < SIZE; ++i) {
424	<	assertEquals(i, ((Integer)q.peek()).intValue());
425	<	q.poll();
424	>	assertEquals(i, q.peek());
425	>	assertEquals(i, q.poll());
426		assertTrue(q.peek() == null ||
427	<	i != ((Integer)q.peek()).intValue());
427	>	!q.peek().equals(i));
428		}
429	<	assertNull(q.peek());
429	>	assertNull(q.peek());
430		}
431
432	<	public void testElement(){
432	>	/**
433	>	* element returns next element, or throws NSEE if empty
434	>	*/
435	>	public void testElement() {
436		PriorityBlockingQueue q = populatedQueue(SIZE);
437		for (int i = 0; i < SIZE; ++i) {
438	<	assertEquals(i, ((Integer)q.element()).intValue());
439	<	q.poll();
438	>	assertEquals(i, q.element());
439	>	assertEquals(i, q.poll());
440		}
441		try {
442		q.element();
443	<	fail("no such element");
444	<	}
457	<	catch (NoSuchElementException success) {}
443	>	shouldThrow();
444	>	} catch (NoSuchElementException success) {}
445		}
446
447	<	public void testRemove(){
447	>	/**
448	>	* remove removes next element, or throws NSEE if empty
449	>	*/
450	>	public void testRemove() {
451		PriorityBlockingQueue q = populatedQueue(SIZE);
452		for (int i = 0; i < SIZE; ++i) {
453	<	assertEquals(i, ((Integer)q.remove()).intValue());
453	>	assertEquals(i, q.remove());
454		}
455		try {
456		q.remove();
457	<	fail("remove should throw");
458	<	} catch (NoSuchElementException success){
469	<	}
457	>	shouldThrow();
458	>	} catch (NoSuchElementException success) {}
459		}
460
461	<	public void testRemoveElement(){
462	<	PriorityBlockingQueue q = populatedQueue(SIZE);
463	<	for (int i = 1; i < SIZE; i+=2) {
464	<	assertTrue(q.remove(new Integer(i)));
476	<	}
477	<	for (int i = 0; i < SIZE; i+=2) {
478	<	assertTrue(q.remove(new Integer(i)));
479	<	assertFalse(q.remove(new Integer(i+1)));
480	<	}
481	<	assertTrue(q.isEmpty());
482	<	}
483	<
484	<	public void testContains(){
461	>	/**
462	>	* contains(x) reports true when elements added but not yet removed
463	>	*/
464	>	public void testContains() {
465		PriorityBlockingQueue q = populatedQueue(SIZE);
466		for (int i = 0; i < SIZE; ++i) {
467		assertTrue(q.contains(new Integer(i)));
#	Line 490 | Line 470 | public class PriorityBlockingQueueTest e
470		}
471		}
472
473	<	public void testClear(){
473	>	/**
474	>	* clear removes all elements
475	>	*/
476	>	public void testClear() {
477		PriorityBlockingQueue q = populatedQueue(SIZE);
478		q.clear();
479		assertTrue(q.isEmpty());
480		assertEquals(0, q.size());
481	<	assertEquals(NOCAP, q.remainingCapacity());
499	<	q.add(new Integer(1));
481	>	q.add(one);
482		assertFalse(q.isEmpty());
483	+	assertTrue(q.contains(one));
484		q.clear();
485		assertTrue(q.isEmpty());
486		}
487
488	<	public void testContainsAll(){
488	>	/**
489	>	* containsAll(c) is true when c contains a subset of elements
490	>	*/
491	>	public void testContainsAll() {
492		PriorityBlockingQueue q = populatedQueue(SIZE);
493		PriorityBlockingQueue p = new PriorityBlockingQueue(SIZE);
494		for (int i = 0; i < SIZE; ++i) {
#	Line 513 | Line 499 | public class PriorityBlockingQueueTest e
499		assertTrue(p.containsAll(q));
500		}
501
502	<	public void testRetainAll(){
502	>	/**
503	>	* retainAll(c) retains only those elements of c and reports true if changed
504	>	*/
505	>	public void testRetainAll() {
506		PriorityBlockingQueue q = populatedQueue(SIZE);
507		PriorityBlockingQueue p = populatedQueue(SIZE);
508		for (int i = 0; i < SIZE; ++i) {
#	Line 529 | Line 518 | public class PriorityBlockingQueueTest e
518		}
519		}
520
521	<	public void testRemoveAll(){
521	>	/**
522	>	* removeAll(c) removes only those elements of c and reports true if changed
523	>	*/
524	>	public void testRemoveAll() {
525		for (int i = 1; i < SIZE; ++i) {
526		PriorityBlockingQueue q = populatedQueue(SIZE);
527		PriorityBlockingQueue p = populatedQueue(i);
#	Line 542 | Line 534 | public class PriorityBlockingQueueTest e
534		}
535		}
536
537	<	public void testToArray(){
537	>	/**
538	>	* toArray contains all elements
539	>	*/
540	>	public void testToArray() throws InterruptedException {
541		PriorityBlockingQueue q = populatedQueue(SIZE);
542	<	Object[] o = q.toArray();
542	>	Object[] o = q.toArray();
543		Arrays.sort(o);
544	<	try {
545	<	for(int i = 0; i < o.length; i++)
551	<	assertEquals(o[i], q.take());
552	<	} catch (InterruptedException e){
553	<	fail("Unexpected exception");
554	<	}
544	>	for (int i = 0; i < o.length; i++)
545	>	assertSame(o[i], q.take());
546		}
547
548	<	public void testToArray2(){
549	<	PriorityBlockingQueue q = populatedQueue(SIZE);
550	<	Integer[] ints = new Integer[SIZE];
551	<	ints = (Integer[])q.toArray(ints);
548	>	/**
549	>	* toArray(a) contains all elements
550	>	*/
551	>	public void testToArray2() throws InterruptedException {
552	>	PriorityBlockingQueue<Integer> q = populatedQueue(SIZE);
553	>	Integer[] ints = new Integer[SIZE];
554	>	Integer[] array = q.toArray(ints);
555	>	assertSame(ints, array);
556		Arrays.sort(ints);
557	<	try {
558	<	for(int i = 0; i < ints.length; i++)
564	<	assertEquals(ints[i], q.take());
565	<	} catch (InterruptedException e){
566	<	fail("Unexpected exception");
567	<	}
557	>	for (int i = 0; i < ints.length; i++)
558	>	assertSame(ints[i], q.take());
559		}
560	<
561	<	public void testIterator(){
560	>
561	>	/**
562	>	* toArray(incompatible array type) throws ArrayStoreException
563	>	*/
564	>	public void testToArray1_BadArg() {
565	>	PriorityBlockingQueue q = populatedQueue(SIZE);
566	>	try {
567	>	q.toArray(new String[10]);
568	>	shouldThrow();
569	>	} catch (ArrayStoreException success) {}
570	>	}
571	>
572	>	/**
573	>	* iterator iterates through all elements
574	>	*/
575	>	public void testIterator() {
576		PriorityBlockingQueue q = populatedQueue(SIZE);
577		int i = 0;
578	<	Iterator it = q.iterator();
579	<	while(it.hasNext()) {
578	>	Iterator it = q.iterator();
579	>	while (it.hasNext()) {
580		assertTrue(q.contains(it.next()));
581		++i;
582		}
583		assertEquals(i, SIZE);
584		}
585
586	<	public void testIteratorRemove () {
587	<
586	>	/**
587	>	* iterator.remove removes current element
588	>	*/
589	>	public void testIteratorRemove() {
590		final PriorityBlockingQueue q = new PriorityBlockingQueue(3);
584	–
591		q.add(new Integer(2));
592		q.add(new Integer(1));
593		q.add(new Integer(3));
#	Line 596 | Line 602 | public class PriorityBlockingQueueTest e
602		assertFalse(it.hasNext());
603		}
604
605	<
606	<	public void testToString(){
605	>	/**
606	>	* toString contains toStrings of elements
607	>	*/
608	>	public void testToString() {
609		PriorityBlockingQueue q = populatedQueue(SIZE);
610		String s = q.toString();
611		for (int i = 0; i < SIZE; ++i) {
612	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
612	>	assertTrue(s.contains(String.valueOf(i)));
613		}
614	<	}
614	>	}
615
616	+	/**
617	+	* timed poll transfers elements across Executor tasks
618	+	*/
619		public void testPollInExecutor() {
609	–
620		final PriorityBlockingQueue q = new PriorityBlockingQueue(2);
621	<
621	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
622		ExecutorService executor = Executors.newFixedThreadPool(2);
623	+	executor.execute(new CheckedRunnable() {
624	+	public void realRun() throws InterruptedException {
625	+	assertNull(q.poll());
626	+	threadsStarted.await();
627	+	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
628	+	checkEmpty(q);
629	+	}});
630	+
631	+	executor.execute(new CheckedRunnable() {
632	+	public void realRun() throws InterruptedException {
633	+	threadsStarted.await();
634	+	q.put(one);
635	+	}});
636
614	–	executor.execute(new Runnable() {
615	–	public void run() {
616	–	threadAssertNull(q.poll());
617	–	try {
618	–	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
619	–	threadAssertTrue(q.isEmpty());
620	–	}
621	–	catch (InterruptedException e) {
622	–	threadFail("should not be interrupted");
623	–	}
624	–	}
625	–	});
626	–
627	–	executor.execute(new Runnable() {
628	–	public void run() {
629	–	try {
630	–	Thread.sleep(SMALL_DELAY_MS);
631	–	q.put(new Integer(1));
632	–	}
633	–	catch (InterruptedException e) {
634	–	threadFail("should not be interrupted");
635	–	}
636	–	}
637	–	});
638	–
637		joinPool(executor);
638	+	}
639
640	+	/**
641	+	* A deserialized serialized queue has same elements
642	+	*/
643	+	public void testSerialization() throws Exception {
644	+	Queue x = populatedQueue(SIZE);
645	+	Queue y = serialClone(x);
646	+
647	+	assertNotSame(x, y);
648	+	assertEquals(x.size(), y.size());
649	+	while (!x.isEmpty()) {
650	+	assertFalse(y.isEmpty());
651	+	assertEquals(x.remove(), y.remove());
652	+	}
653	+	assertTrue(y.isEmpty());
654		}
655
656	<	public void testSerialization() {
656	>	/**
657	>	* drainTo(c) empties queue into another collection c
658	>	*/
659	>	public void testDrainTo() {
660		PriorityBlockingQueue q = populatedQueue(SIZE);
661	<	try {
662	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
663	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
664	<	out.writeObject(q);
665	<	out.close();
666	<
667	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
668	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
669	<	PriorityBlockingQueue r = (PriorityBlockingQueue)in.readObject();
670	<	assertEquals(q.size(), r.size());
671	<	while (!q.isEmpty())
672	<	assertEquals(q.remove(), r.remove());
673	<	} catch(Exception e){
674	<	fail("unexpected exception");
661	>	ArrayList l = new ArrayList();
662	>	q.drainTo(l);
663	>	assertEquals(0, q.size());
664	>	assertEquals(SIZE, l.size());
665	>	for (int i = 0; i < SIZE; ++i)
666	>	assertEquals(l.get(i), new Integer(i));
667	>	q.add(zero);
668	>	q.add(one);
669	>	assertFalse(q.isEmpty());
670	>	assertTrue(q.contains(zero));
671	>	assertTrue(q.contains(one));
672	>	l.clear();
673	>	q.drainTo(l);
674	>	assertEquals(0, q.size());
675	>	assertEquals(2, l.size());
676	>	for (int i = 0; i < 2; ++i)
677	>	assertEquals(l.get(i), new Integer(i));
678	>	}
679	>
680	>	/**
681	>	* drainTo empties queue
682	>	*/
683	>	public void testDrainToWithActivePut() throws InterruptedException {
684	>	final PriorityBlockingQueue q = populatedQueue(SIZE);
685	>	Thread t = new Thread(new CheckedRunnable() {
686	>	public void realRun() {
687	>	q.put(new Integer(SIZE+1));
688	>	}});
689	>
690	>	t.start();
691	>	ArrayList l = new ArrayList();
692	>	q.drainTo(l);
693	>	assertTrue(l.size() >= SIZE);
694	>	for (int i = 0; i < SIZE; ++i)
695	>	assertEquals(l.get(i), new Integer(i));
696	>	t.join();
697	>	assertTrue(q.size() + l.size() >= SIZE);
698	>	}
699	>
700	>	/**
701	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
702	>	*/
703	>	public void testDrainToN() {
704	>	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE*2);
705	>	for (int i = 0; i < SIZE + 2; ++i) {
706	>	for (int j = 0; j < SIZE; j++)
707	>	assertTrue(q.offer(new Integer(j)));
708	>	ArrayList l = new ArrayList();
709	>	q.drainTo(l, i);
710	>	int k = (i < SIZE) ? i : SIZE;
711	>	assertEquals(k, l.size());
712	>	assertEquals(SIZE-k, q.size());
713	>	for (int j = 0; j < k; ++j)
714	>	assertEquals(l.get(j), new Integer(j));
715	>	while (q.poll() != null) ;
716	>	}
717	>	}
718	>
719	>	/**
720	>	* remove(null), contains(null) always return false
721	>	*/
722	>	public void testNeverContainsNull() {
723	>	Collection<?>[] qs = {
724	>	new PriorityBlockingQueue<Object>(),
725	>	populatedQueue(2),
726	>	};
727	>
728	>	for (Collection<?> q : qs) {
729	>	assertFalse(q.contains(null));
730	>	assertFalse(q.remove(null));
731		}
732		}
733

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