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

Comparing jsr166/src/test/tck/PriorityBlockingQueueTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.82 by jsr166, Sun Aug 11 22:29:27 2019 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.Comparator;
15	>	import java.util.Iterator;
16	>	import java.util.NoSuchElementException;
17	>	import java.util.Queue;
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 java.util.concurrent.PriorityBlockingQueue;
23	>	import java.util.concurrent.ThreadLocalRandom;
24	>
25	>	import junit.framework.Test;
26
27		public class PriorityBlockingQueueTest extends JSR166TestCase {
28	+
29	+	public static class Generic extends BlockingQueueTest {
30	+	protected BlockingQueue emptyCollection() {
31	+	return new PriorityBlockingQueue();
32	+	}
33	+	}
34	+
35	+	public static class InitialCapacity extends BlockingQueueTest {
36	+	protected BlockingQueue emptyCollection() {
37	+	ThreadLocalRandom rnd = ThreadLocalRandom.current();
38	+	int initialCapacity = rnd.nextInt(1, SIZE);
39	+	return new PriorityBlockingQueue(initialCapacity);
40	+	}
41	+	}
42	+
43		public static void main(String[] args) {
44	<	junit.textui.TestRunner.run (suite());
44	>	main(suite(), args);
45		}
46
47		public static Test suite() {
48	<	return new TestSuite(PriorityBlockingQueueTest.class);
48	>	class Implementation implements CollectionImplementation {
49	>	public Class<?> klazz() { return PriorityBlockingQueue.class; }
50	>	public Collection emptyCollection() {
51	>	return new PriorityBlockingQueue();
52	>	}
53	>	public Object makeElement(int i) { return i; }
54	>	public boolean isConcurrent() { return true; }
55	>	public boolean permitsNulls() { return false; }
56	>	}
57	>	class ComparatorImplementation implements CollectionImplementation {
58	>	public Class<?> klazz() { return PriorityBlockingQueue.class; }
59	>	public Collection emptyCollection() {
60	>	ThreadLocalRandom rnd = ThreadLocalRandom.current();
61	>	int initialCapacity = rnd.nextInt(1, 10);
62	>	return new PriorityBlockingQueue(
63	>	initialCapacity, new MyReverseComparator());
64	>	}
65	>	public Object makeElement(int i) { return i; }
66	>	public boolean isConcurrent() { return true; }
67	>	public boolean permitsNulls() { return false; }
68	>	}
69	>	return newTestSuite(
70	>	PriorityBlockingQueueTest.class,
71	>	new Generic().testSuite(),
72	>	new InitialCapacity().testSuite(),
73	>	CollectionTest.testSuite(new Implementation()),
74	>	CollectionTest.testSuite(new ComparatorImplementation()));
75		}
76
22	–	private static final int NOCAP = Integer.MAX_VALUE;
23	–
77		/** Sample Comparator */
78	<	static class MyReverseComparator implements Comparator {
78	>	static class MyReverseComparator implements Comparator, java.io.Serializable {
79		public int compare(Object x, Object y) {
80	<	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;
80	>	return ((Comparable)y).compareTo(x);
81		}
82		}
83
35	–
84		/**
85	<	* Create a queue of given size containing consecutive
86	<	* Integers 0 ... n.
85	>	* Returns a new queue of given size containing consecutive
86	>	* Integers 0 ... n - 1.
87		*/
88	<	private PriorityBlockingQueue populatedQueue(int n) {
89	<	PriorityBlockingQueue q = new PriorityBlockingQueue(n);
88	>	private static PriorityBlockingQueue<Integer> populatedQueue(int n) {
89	>	PriorityBlockingQueue<Integer> q =
90	>	new PriorityBlockingQueue<Integer>(n);
91		assertTrue(q.isEmpty());
92	<	for(int i = n-1; i >= 0; i-=2)
93	<	assertTrue(q.offer(new Integer(i)));
94	<	for(int i = (n & 1); i < n; i+=2)
95	<	assertTrue(q.offer(new Integer(i)));
92	>	for (int i = n - 1; i >= 0; i -= 2)
93	>	assertTrue(q.offer(new Integer(i)));
94	>	for (int i = (n & 1); i < n; i += 2)
95	>	assertTrue(q.offer(new Integer(i)));
96		assertFalse(q.isEmpty());
97	<	assertEquals(NOCAP, q.remainingCapacity());
98	<	assertEquals(n, q.size());
97	>	assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
98	>	assertEquals(n, q.size());
99	>	assertEquals((Integer) 0, q.peek());
100		return q;
101		}
102	<
103	<	public void testConstructor1(){
104	<	assertEquals(NOCAP, new PriorityBlockingQueue(SIZE).remainingCapacity());
102	>
103	>	/**
104	>	* A new queue has unbounded capacity
105	>	*/
106	>	public void testConstructor1() {
107	>	assertEquals(Integer.MAX_VALUE,
108	>	new PriorityBlockingQueue(SIZE).remainingCapacity());
109		}
110
111	<	public void testConstructor2(){
111	>	/**
112	>	* Constructor throws IllegalArgumentException if capacity argument nonpositive
113	>	*/
114	>	public void testConstructor2() {
115		try {
116	<	PriorityBlockingQueue q = new PriorityBlockingQueue(0);
117	<	fail("Cannot make zero-sized");
118	<	}
62	<	catch (IllegalArgumentException success) {}
116	>	new PriorityBlockingQueue(0);
117	>	shouldThrow();
118	>	} catch (IllegalArgumentException success) {}
119		}
120
121	<	public void testConstructor3(){
122	<
121	>	/**
122	>	* Initializing from null Collection throws NPE
123	>	*/
124	>	public void testConstructor3() {
125		try {
126	<	PriorityBlockingQueue q = new PriorityBlockingQueue(null);
127	<	fail("Cannot make from null collection");
128	<	}
71	<	catch (NullPointerException success) {}
126	>	new PriorityBlockingQueue(null);
127	>	shouldThrow();
128	>	} catch (NullPointerException success) {}
129		}
130
131	<	public void testConstructor4(){
131	>	/**
132	>	* Initializing from Collection of null elements throws NPE
133	>	*/
134	>	public void testConstructor4() {
135	>	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
136		try {
137	<	Integer[] ints = new Integer[SIZE];
138	<	PriorityBlockingQueue q = new PriorityBlockingQueue(Arrays.asList(ints));
139	<	fail("Cannot make with null elements");
79	<	}
80	<	catch (NullPointerException success) {}
137	>	new PriorityBlockingQueue(elements);
138	>	shouldThrow();
139	>	} catch (NullPointerException success) {}
140		}
141
142	<	public void testConstructor5(){
143	<	try {
144	<	Integer[] ints = new Integer[SIZE];
145	<	for (int i = 0; i < SIZE-1; ++i)
146	<	ints[i] = new Integer(i);
147	<	PriorityBlockingQueue q = new PriorityBlockingQueue(Arrays.asList(ints));
148	<	fail("Cannot make with null elements");
149	<	}
150	<	catch (NullPointerException success) {}
142	>	/**
143	>	* Initializing from Collection with some null elements throws NPE
144	>	*/
145	>	public void testConstructor5() {
146	>	Integer[] ints = new Integer[SIZE];
147	>	for (int i = 0; i < SIZE - 1; ++i)
148	>	ints[i] = i;
149	>	Collection<Integer> elements = Arrays.asList(ints);
150	>	try {
151	>	new PriorityBlockingQueue(elements);
152	>	shouldThrow();
153	>	} catch (NullPointerException success) {}
154		}
155
156	<	public void testConstructor6(){
157	<	try {
158	<	Integer[] ints = new Integer[SIZE];
159	<	for (int i = 0; i < SIZE; ++i)
160	<	ints[i] = new Integer(i);
161	<	PriorityBlockingQueue q = new PriorityBlockingQueue(Arrays.asList(ints));
162	<	for (int i = 0; i < SIZE; ++i)
163	<	assertEquals(ints[i], q.poll());
164	<	}
165	<	finally {}
156	>	/**
157	>	* Queue contains all elements of collection used to initialize
158	>	*/
159	>	public void testConstructor6() {
160	>	Integer[] ints = new Integer[SIZE];
161	>	for (int i = 0; i < SIZE; ++i)
162	>	ints[i] = i;
163	>	PriorityBlockingQueue q = new PriorityBlockingQueue(Arrays.asList(ints));
164	>	for (int i = 0; i < SIZE; ++i)
165	>	assertEquals(ints[i], q.poll());
166		}
167
168	<	public void testConstructor7(){
169	<	try {
170	<	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE, new MyReverseComparator());
171	<	Integer[] ints = new Integer[SIZE];
172	<	for (int i = 0; i < SIZE; ++i)
173	<	ints[i] = new Integer(i);
174	<	q.addAll(Arrays.asList(ints));
175	<	for (int i = SIZE-1; i >= 0; --i)
176	<	assertEquals(ints[i], q.poll());
177	<	}
178	<	finally {}
168	>	/**
169	>	* The comparator used in constructor is used
170	>	*/
171	>	public void testConstructor7() {
172	>	MyReverseComparator cmp = new MyReverseComparator();
173	>	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE, cmp);
174	>	assertEquals(cmp, q.comparator());
175	>	Integer[] ints = new Integer[SIZE];
176	>	for (int i = 0; i < SIZE; ++i)
177	>	ints[i] = new Integer(i);
178	>	q.addAll(Arrays.asList(ints));
179	>	for (int i = SIZE - 1; i >= 0; --i)
180	>	assertEquals(ints[i], q.poll());
181		}
182
183	+	/**
184	+	* isEmpty is true before add, false after
185	+	*/
186		public void testEmpty() {
187		PriorityBlockingQueue q = new PriorityBlockingQueue(2);
188		assertTrue(q.isEmpty());
189	<	assertEquals(NOCAP, q.remainingCapacity());
190	<	q.add(new Integer(1));
189	>	assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
190	>	q.add(one);
191		assertFalse(q.isEmpty());
192	<	q.add(new Integer(2));
192	>	q.add(two);
193		q.remove();
194		q.remove();
195		assertTrue(q.isEmpty());
196		}
197
198	<	public void testRemainingCapacity(){
199	<	PriorityBlockingQueue q = populatedQueue(SIZE);
198	>	/**
199	>	* remainingCapacity() always returns Integer.MAX_VALUE
200	>	*/
201	>	public void testRemainingCapacity() {
202	>	BlockingQueue q = populatedQueue(SIZE);
203		for (int i = 0; i < SIZE; ++i) {
204	<	assertEquals(NOCAP, q.remainingCapacity());
205	<	assertEquals(SIZE-i, q.size());
206	<	q.remove();
204	>	assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
205	>	assertEquals(SIZE - i, q.size());
206	>	assertEquals(i, q.remove());
207		}
208		for (int i = 0; i < SIZE; ++i) {
209	<	assertEquals(NOCAP, q.remainingCapacity());
209	>	assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
210		assertEquals(i, q.size());
211	<	q.add(new Integer(i));
211	>	assertTrue(q.add(i));
212		}
213		}
214
215	<	public void testOfferNull(){
216	<	try {
217	<	PriorityBlockingQueue q = new PriorityBlockingQueue(1);
148	<	q.offer(null);
149	<	fail("should throw NPE");
150	<	} catch (NullPointerException success) { }
151	<	}
152	<
215	>	/**
216	>	* Offer of comparable element succeeds
217	>	*/
218		public void testOffer() {
219		PriorityBlockingQueue q = new PriorityBlockingQueue(1);
220	<	assertTrue(q.offer(new Integer(0)));
221	<	assertTrue(q.offer(new Integer(1)));
220	>	assertTrue(q.offer(zero));
221	>	assertTrue(q.offer(one));
222		}
223
224	+	/**
225	+	* Offer of non-Comparable throws CCE
226	+	*/
227		public void testOfferNonComparable() {
228	+	PriorityBlockingQueue q = new PriorityBlockingQueue(1);
229		try {
161	–	PriorityBlockingQueue q = new PriorityBlockingQueue(1);
230		q.offer(new Object());
231	<	q.offer(new Object());
232	<	q.offer(new Object());
233	<	fail("should throw CCE");
231	>	shouldThrow();
232	>	} catch (ClassCastException success) {
233	>	assertTrue(q.isEmpty());
234	>	assertEquals(0, q.size());
235	>	assertNull(q.poll());
236		}
167	–	catch(ClassCastException success) {}
237		}
238
239	<	public void testAdd(){
239	>	/**
240	>	* add of comparable succeeds
241	>	*/
242	>	public void testAdd() {
243		PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
244		for (int i = 0; i < SIZE; ++i) {
245		assertEquals(i, q.size());
#	Line 175 | Line 247 | public class PriorityBlockingQueueTest e
247		}
248		}
249
250	<	public void testAddAll1(){
250	>	/**
251	>	* addAll(this) throws IllegalArgumentException
252	>	*/
253	>	public void testAddAllSelf() {
254	>	PriorityBlockingQueue q = populatedQueue(SIZE);
255		try {
256	<	PriorityBlockingQueue q = new PriorityBlockingQueue(1);
257	<	q.addAll(null);
258	<	fail("Cannot add null collection");
183	<	}
184	<	catch (NullPointerException success) {}
256	>	q.addAll(q);
257	>	shouldThrow();
258	>	} catch (IllegalArgumentException success) {}
259		}
260	<	public void testAddAll2(){
260	>
261	>	/**
262	>	* addAll of a collection with any null elements throws NPE after
263	>	* possibly adding some elements
264	>	*/
265	>	public void testAddAll3() {
266	>	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
267	>	Integer[] ints = new Integer[SIZE];
268	>	for (int i = 0; i < SIZE - 1; ++i)
269	>	ints[i] = new Integer(i);
270		try {
188	–	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
189	–	Integer[] ints = new Integer[SIZE];
271		q.addAll(Arrays.asList(ints));
272	<	fail("Cannot add null elements");
273	<	}
193	<	catch (NullPointerException success) {}
272	>	shouldThrow();
273	>	} catch (NullPointerException success) {}
274		}
275	<	public void testAddAll3(){
276	<	try {
277	<	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
278	<	Integer[] ints = new Integer[SIZE];
279	<	for (int i = 0; i < SIZE-1; ++i)
280	<	ints[i] = new Integer(i);
281	<	q.addAll(Arrays.asList(ints));
282	<	fail("Cannot add null elements");
283	<	}
284	<	catch (NullPointerException success) {}
275	>
276	>	/**
277	>	* Queue contains all elements of successful addAll
278	>	*/
279	>	public void testAddAll5() {
280	>	Integer[] empty = new Integer[0];
281	>	Integer[] ints = new Integer[SIZE];
282	>	for (int i = SIZE - 1; i >= 0; --i)
283	>	ints[i] = new Integer(i);
284	>	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
285	>	assertFalse(q.addAll(Arrays.asList(empty)));
286	>	assertTrue(q.addAll(Arrays.asList(ints)));
287	>	for (int i = 0; i < SIZE; ++i)
288	>	assertEquals(ints[i], q.poll());
289		}
290
291	<	public void testAddAll5(){
292	<	try {
293	<	Integer[] empty = new Integer[0];
294	<	Integer[] ints = new Integer[SIZE];
295	<	for (int i = SIZE-1; i >= 0; --i)
296	<	ints[i] = new Integer(i);
297	<	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
298	<	assertFalse(q.addAll(Arrays.asList(empty)));
299	<	assertTrue(q.addAll(Arrays.asList(ints)));
216	<	for (int i = 0; i < SIZE; ++i)
217	<	assertEquals(ints[i], q.poll());
218	<	}
219	<	finally {}
220	<	}
221	<
222	<	public void testPutNull() {
223	<	try {
224	<	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
225	<	q.put(null);
226	<	fail("put should throw NPE");
227	<	}
228	<	catch (NullPointerException success){
229	<	}
230	<	}
231	<
232	<	public void testPut() {
233	<	try {
234	<	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
235	<	for (int i = 0; i < SIZE; ++i) {
236	<	Integer I = new Integer(i);
237	<	q.put(I);
238	<	assertTrue(q.contains(I));
239	<	}
240	<	assertEquals(SIZE, q.size());
241	<	}
242	<	finally {
291	>	/**
292	>	* all elements successfully put are contained
293	>	*/
294	>	public void testPut() {
295	>	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE);
296	>	for (int i = 0; i < SIZE; ++i) {
297	>	Integer x = new Integer(i);
298	>	q.put(x);
299	>	assertTrue(q.contains(x));
300		}
301	+	assertEquals(SIZE, q.size());
302		}
303
304	<	public void testPutWithTake() {
304	>	/**
305	>	* put doesn't block waiting for take
306	>	*/
307	>	public void testPutWithTake() throws InterruptedException {
308		final PriorityBlockingQueue q = new PriorityBlockingQueue(2);
309	<	Thread t = new Thread(new Runnable() {
310	<	public void run(){
311	<	int added = 0;
312	<	try {
313	<	q.put(new Integer(0));
314	<	++added;
315	<	q.put(new Integer(0));
316	<	++added;
317	<	q.put(new Integer(0));
318	<	++added;
258	<	q.put(new Integer(0));
259	<	++added;
260	<	threadAssertTrue(added == 4);
261	<	} finally {
262	<	}
263	<	}
264	<	});
265	<	try {
266	<	t.start();
267	<	Thread.sleep(SHORT_DELAY_MS);
268	<	q.take();
269	<	t.interrupt();
270	<	t.join();
271	<	} catch (Exception e){
272	<	fail("Unexpected exception");
273	<	}
309	>	final int size = 4;
310	>	Thread t = newStartedThread(new CheckedRunnable() {
311	>	public void realRun() {
312	>	for (int i = 0; i < size; i++)
313	>	q.put(new Integer(0));
314	>	}});
315	>
316	>	awaitTermination(t);
317	>	assertEquals(size, q.size());
318	>	q.take();
319		}
320
321	+	/**
322	+	* timed offer does not time out
323	+	*/
324		public void testTimedOffer() {
325		final PriorityBlockingQueue q = new PriorityBlockingQueue(2);
326	<	Thread t = new Thread(new Runnable() {
327	<	public void run(){
328	<	try {
329	<	q.put(new Integer(0));
330	<	q.put(new Integer(0));
331	<	threadAssertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
332	<	threadAssertTrue(q.offer(new Integer(0), LONG_DELAY_MS, TimeUnit.MILLISECONDS));
285	<	} finally { }
286	<	}
287	<	});
288	<
289	<	try {
290	<	t.start();
291	<	Thread.sleep(SMALL_DELAY_MS);
292	<	t.interrupt();
293	<	t.join();
294	<	} catch (Exception e){
295	<	fail("Unexpected exception");
296	<	}
297	<	}
326	>	Thread t = newStartedThread(new CheckedRunnable() {
327	>	public void realRun() {
328	>	q.put(new Integer(0));
329	>	q.put(new Integer(0));
330	>	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, MILLISECONDS));
331	>	assertTrue(q.offer(new Integer(0), LONG_DELAY_MS, MILLISECONDS));
332	>	}});
333
334	<	public void testTake(){
300	<	try {
301	<	PriorityBlockingQueue q = populatedQueue(SIZE);
302	<	for (int i = 0; i < SIZE; ++i) {
303	<	assertEquals(i, ((Integer)q.take()).intValue());
304	<	}
305	<	} catch (InterruptedException e){
306	<	fail("Unexpected exception");
307	<	}
334	>	awaitTermination(t);
335		}
336
337	<	public void testTakeFromEmpty() {
338	<	final PriorityBlockingQueue q = new PriorityBlockingQueue(2);
339	<	Thread t = new Thread(new Runnable() {
340	<	public void run(){
341	<	try {
342	<	q.take();
343	<	threadFail("Should block");
317	<	} catch (InterruptedException success){ }
318	<	}
319	<	});
320	<	try {
321	<	t.start();
322	<	Thread.sleep(SHORT_DELAY_MS);
323	<	t.interrupt();
324	<	t.join();
325	<	} catch (Exception e){
326	<	fail("Unexpected exception");
337	>	/**
338	>	* take retrieves elements in priority order
339	>	*/
340	>	public void testTake() throws InterruptedException {
341	>	PriorityBlockingQueue q = populatedQueue(SIZE);
342	>	for (int i = 0; i < SIZE; ++i) {
343	>	assertEquals(i, q.take());
344		}
345		}
346
347	<	public void testBlockingTake(){
348	<	Thread t = new Thread(new Runnable() {
349	<	public void run() {
350	<	try {
351	<	PriorityBlockingQueue q = populatedQueue(SIZE);
352	<	for (int i = 0; i < SIZE; ++i) {
353	<	threadAssertEquals(i, ((Integer)q.take()).intValue());
354	<	}
355	<	q.take();
339	<	threadFail("take should block");
340	<	} catch (InterruptedException success){
341	<	}
342	<	}});
343	<	t.start();
344	<	try {
345	<	Thread.sleep(SHORT_DELAY_MS);
346	<	t.interrupt();
347	<	t.join();
348	<	}
349	<	catch (InterruptedException ie) {
350	<	fail("Unexpected exception");
351	<	}
352	<	}
347	>	/**
348	>	* Take removes existing elements until empty, then blocks interruptibly
349	>	*/
350	>	public void testBlockingTake() throws InterruptedException {
351	>	final PriorityBlockingQueue q = populatedQueue(SIZE);
352	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
353	>	Thread t = newStartedThread(new CheckedRunnable() {
354	>	public void realRun() throws InterruptedException {
355	>	for (int i = 0; i < SIZE; i++) assertEquals(i, q.take());
356
357	+	Thread.currentThread().interrupt();
358	+	try {
359	+	q.take();
360	+	shouldThrow();
361	+	} catch (InterruptedException success) {}
362	+	assertFalse(Thread.interrupted());
363	+
364	+	pleaseInterrupt.countDown();
365	+	try {
366	+	q.take();
367	+	shouldThrow();
368	+	} catch (InterruptedException success) {}
369	+	assertFalse(Thread.interrupted());
370	+	}});
371	+
372	+	await(pleaseInterrupt);
373	+	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
374	+	t.interrupt();
375	+	awaitTermination(t);
376	+	}
377
378	<	public void testPoll(){
378	>	/**
379	>	* poll succeeds unless empty
380	>	*/
381	>	public void testPoll() {
382		PriorityBlockingQueue q = populatedQueue(SIZE);
383		for (int i = 0; i < SIZE; ++i) {
384	<	assertEquals(i, ((Integer)q.poll()).intValue());
384	>	assertEquals(i, q.poll());
385		}
386	<	assertNull(q.poll());
386	>	assertNull(q.poll());
387		}
388
389	<	public void testTimedPoll0() {
390	<	try {
391	<	PriorityBlockingQueue q = populatedQueue(SIZE);
392	<	for (int i = 0; i < SIZE; ++i) {
393	<	assertEquals(i, ((Integer)q.poll(0, TimeUnit.MILLISECONDS)).intValue());
394	<	}
395	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
396	<	} catch (InterruptedException e){
397	<	fail("Unexpected exception");
372	<	}
389	>	/**
390	>	* timed poll with zero timeout succeeds when non-empty, else times out
391	>	*/
392	>	public void testTimedPoll0() throws InterruptedException {
393	>	PriorityBlockingQueue q = populatedQueue(SIZE);
394	>	for (int i = 0; i < SIZE; ++i) {
395	>	assertEquals(i, q.poll(0, MILLISECONDS));
396	>	}
397	>	assertNull(q.poll(0, MILLISECONDS));
398		}
399
400	<	public void testTimedPoll() {
401	<	try {
402	<	PriorityBlockingQueue q = populatedQueue(SIZE);
403	<	for (int i = 0; i < SIZE; ++i) {
404	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
405	<	}
406	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
407	<	} catch (InterruptedException e){
408	<	fail("Unexpected exception");
409	<	}
410	<	}
411	<
412	<	public void testInterruptedTimedPoll(){
413	<	Thread t = new Thread(new Runnable() {
389	<	public void run() {
390	<	try {
391	<	PriorityBlockingQueue q = populatedQueue(SIZE);
392	<	for (int i = 0; i < SIZE; ++i) {
393	<	threadAssertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)).intValue());
394	<	}
395	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
396	<	} catch (InterruptedException success){
397	<	}
398	<	}});
399	<	t.start();
400	<	try {
401	<	Thread.sleep(SHORT_DELAY_MS);
402	<	t.interrupt();
403	<	t.join();
404	<	}
405	<	catch (InterruptedException ie) {
406	<	fail("Unexpected exception");
407	<	}
400	>	/**
401	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
402	>	*/
403	>	public void testTimedPoll() throws InterruptedException {
404	>	PriorityBlockingQueue<Integer> q = populatedQueue(SIZE);
405	>	for (int i = 0; i < SIZE; ++i) {
406	>	long startTime = System.nanoTime();
407	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
408	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
409	>	}
410	>	long startTime = System.nanoTime();
411	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
412	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
413	>	checkEmpty(q);
414		}
415
416	<	public void testTimedPollWithOffer(){
417	<	final PriorityBlockingQueue q = new PriorityBlockingQueue(2);
418	<	Thread t = new Thread(new Runnable() {
419	<	public void run(){
420	<	try {
421	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
422	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
423	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
424	<	threadFail("Should block");
425	<	} catch (InterruptedException success) { }
426	<	}
427	<	});
422	<	try {
423	<	t.start();
424	<	Thread.sleep(SMALL_DELAY_MS);
425	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
426	<	t.interrupt();
427	<	t.join();
428	<	} catch (Exception e){
429	<	fail("Unexpected exception");
430	<	}
431	<	}
416	>	/**
417	>	* Interrupted timed poll throws InterruptedException instead of
418	>	* returning timeout status
419	>	*/
420	>	public void testInterruptedTimedPoll() throws InterruptedException {
421	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
422	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
423	>	Thread t = newStartedThread(new CheckedRunnable() {
424	>	public void realRun() throws InterruptedException {
425	>	long startTime = System.nanoTime();
426	>	for (int i = 0; i < SIZE; i++)
427	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
428
429	+	Thread.currentThread().interrupt();
430	+	try {
431	+	q.poll(randomTimeout(), randomTimeUnit());
432	+	shouldThrow();
433	+	} catch (InterruptedException success) {}
434	+	assertFalse(Thread.interrupted());
435	+
436	+	pleaseInterrupt.countDown();
437	+	try {
438	+	q.poll(LONG_DELAY_MS, MILLISECONDS);
439	+	shouldThrow();
440	+	} catch (InterruptedException success) {}
441	+	assertFalse(Thread.interrupted());
442	+
443	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
444	+	}});
445	+
446	+	await(pleaseInterrupt);
447	+	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
448	+	t.interrupt();
449	+	awaitTermination(t);
450	+	}
451
452	<	public void testPeek(){
452	>	/**
453	>	* peek returns next element, or null if empty
454	>	*/
455	>	public void testPeek() {
456		PriorityBlockingQueue q = populatedQueue(SIZE);
457		for (int i = 0; i < SIZE; ++i) {
458	<	assertEquals(i, ((Integer)q.peek()).intValue());
459	<	q.poll();
458	>	assertEquals(i, q.peek());
459	>	assertEquals(i, q.poll());
460		assertTrue(q.peek() == null ||
461	<	i != ((Integer)q.peek()).intValue());
461	>	!q.peek().equals(i));
462		}
463	<	assertNull(q.peek());
463	>	assertNull(q.peek());
464		}
465
466	<	public void testElement(){
466	>	/**
467	>	* element returns next element, or throws NSEE if empty
468	>	*/
469	>	public void testElement() {
470		PriorityBlockingQueue q = populatedQueue(SIZE);
471		for (int i = 0; i < SIZE; ++i) {
472	<	assertEquals(i, ((Integer)q.element()).intValue());
473	<	q.poll();
472	>	assertEquals(i, q.element());
473	>	assertEquals(i, q.poll());
474		}
475		try {
476		q.element();
477	<	fail("no such element");
478	<	}
455	<	catch (NoSuchElementException success) {}
477	>	shouldThrow();
478	>	} catch (NoSuchElementException success) {}
479		}
480
481	<	public void testRemove(){
481	>	/**
482	>	* remove removes next element, or throws NSEE if empty
483	>	*/
484	>	public void testRemove() {
485		PriorityBlockingQueue q = populatedQueue(SIZE);
486		for (int i = 0; i < SIZE; ++i) {
487	<	assertEquals(i, ((Integer)q.remove()).intValue());
487	>	assertEquals(i, q.remove());
488		}
489		try {
490		q.remove();
491	<	fail("remove should throw");
492	<	} catch (NoSuchElementException success){
467	<	}
491	>	shouldThrow();
492	>	} catch (NoSuchElementException success) {}
493		}
494
495	<	public void testRemoveElement(){
496	<	PriorityBlockingQueue q = populatedQueue(SIZE);
497	<	for (int i = 1; i < SIZE; i+=2) {
498	<	assertTrue(q.remove(new Integer(i)));
474	<	}
475	<	for (int i = 0; i < SIZE; i+=2) {
476	<	assertTrue(q.remove(new Integer(i)));
477	<	assertFalse(q.remove(new Integer(i+1)));
478	<	}
479	<	assertTrue(q.isEmpty());
480	<	}
481	<
482	<	public void testContains(){
495	>	/**
496	>	* contains(x) reports true when elements added but not yet removed
497	>	*/
498	>	public void testContains() {
499		PriorityBlockingQueue q = populatedQueue(SIZE);
500		for (int i = 0; i < SIZE; ++i) {
501		assertTrue(q.contains(new Integer(i)));
#	Line 488 | Line 504 | public class PriorityBlockingQueueTest e
504		}
505		}
506
507	<	public void testClear(){
507	>	/**
508	>	* clear removes all elements
509	>	*/
510	>	public void testClear() {
511		PriorityBlockingQueue q = populatedQueue(SIZE);
512		q.clear();
513		assertTrue(q.isEmpty());
514		assertEquals(0, q.size());
515	<	assertEquals(NOCAP, q.remainingCapacity());
497	<	q.add(new Integer(1));
515	>	q.add(one);
516		assertFalse(q.isEmpty());
517	+	assertTrue(q.contains(one));
518		q.clear();
519		assertTrue(q.isEmpty());
520		}
521
522	<	public void testContainsAll(){
522	>	/**
523	>	* containsAll(c) is true when c contains a subset of elements
524	>	*/
525	>	public void testContainsAll() {
526		PriorityBlockingQueue q = populatedQueue(SIZE);
527		PriorityBlockingQueue p = new PriorityBlockingQueue(SIZE);
528		for (int i = 0; i < SIZE; ++i) {
#	Line 511 | Line 533 | public class PriorityBlockingQueueTest e
533		assertTrue(p.containsAll(q));
534		}
535
536	<	public void testRetainAll(){
536	>	/**
537	>	* retainAll(c) retains only those elements of c and reports true if changed
538	>	*/
539	>	public void testRetainAll() {
540		PriorityBlockingQueue q = populatedQueue(SIZE);
541		PriorityBlockingQueue p = populatedQueue(SIZE);
542		for (int i = 0; i < SIZE; ++i) {
#	Line 522 | Line 547 | public class PriorityBlockingQueueTest e
547		assertTrue(changed);
548
549		assertTrue(q.containsAll(p));
550	<	assertEquals(SIZE-i, q.size());
550	>	assertEquals(SIZE - i, q.size());
551		p.remove();
552		}
553		}
554
555	<	public void testRemoveAll(){
555	>	/**
556	>	* removeAll(c) removes only those elements of c and reports true if changed
557	>	*/
558	>	public void testRemoveAll() {
559		for (int i = 1; i < SIZE; ++i) {
560		PriorityBlockingQueue q = populatedQueue(SIZE);
561		PriorityBlockingQueue p = populatedQueue(i);
562		assertTrue(q.removeAll(p));
563	<	assertEquals(SIZE-i, q.size());
563	>	assertEquals(SIZE - i, q.size());
564		for (int j = 0; j < i; ++j) {
565	<	Integer I = (Integer)(p.remove());
566	<	assertFalse(q.contains(I));
565	>	Integer x = (Integer)(p.remove());
566	>	assertFalse(q.contains(x));
567		}
568		}
569		}
570
571	<	public void testToArray(){
571	>	/**
572	>	* toArray contains all elements
573	>	*/
574	>	public void testToArray() throws InterruptedException {
575		PriorityBlockingQueue q = populatedQueue(SIZE);
576	<	Object[] o = q.toArray();
577	<	Arrays.sort(o);
578	<	try {
579	<	for(int i = 0; i < o.length; i++)
580	<	assertEquals(o[i], q.take());
581	<	} catch (InterruptedException e){
551	<	fail("Unexpected exception");
552	<	}
576	>	Object[] a = q.toArray();
577	>	assertSame(Object[].class, a.getClass());
578	>	Arrays.sort(a);
579	>	for (Object o : a)
580	>	assertSame(o, q.take());
581	>	assertTrue(q.isEmpty());
582		}
583
584	<	public void testToArray2(){
585	<	PriorityBlockingQueue q = populatedQueue(SIZE);
586	<	Integer[] ints = new Integer[SIZE];
587	<	ints = (Integer[])q.toArray(ints);
584	>	/**
585	>	* toArray(a) contains all elements
586	>	*/
587	>	public void testToArray2() throws InterruptedException {
588	>	PriorityBlockingQueue<Integer> q = populatedQueue(SIZE);
589	>	Integer[] ints = new Integer[SIZE];
590	>	Integer[] array = q.toArray(ints);
591	>	assertSame(ints, array);
592		Arrays.sort(ints);
593	<	try {
594	<	for(int i = 0; i < ints.length; i++)
595	<	assertEquals(ints[i], q.take());
596	<	} catch (InterruptedException e){
597	<	fail("Unexpected exception");
598	<	}
599	<	}
600	<
601	<	public void testIterator(){
602	<	PriorityBlockingQueue q = populatedQueue(SIZE);
603	<	int i = 0;
604	<	Iterator it = q.iterator();
605	<	while(it.hasNext()) {
593	>	for (Integer o : ints)
594	>	assertSame(o, q.take());
595	>	assertTrue(q.isEmpty());
596	>	}
597	>
598	>	/**
599	>	* toArray(incompatible array type) throws ArrayStoreException
600	>	*/
601	>	public void testToArray1_BadArg() {
602	>	PriorityBlockingQueue q = populatedQueue(SIZE);
603	>	try {
604	>	q.toArray(new String[10]);
605	>	shouldThrow();
606	>	} catch (ArrayStoreException success) {}
607	>	}
608	>
609	>	/**
610	>	* iterator iterates through all elements
611	>	*/
612	>	public void testIterator() {
613	>	PriorityBlockingQueue q = populatedQueue(SIZE);
614	>	Iterator it = q.iterator();
615	>	int i;
616	>	for (i = 0; it.hasNext(); i++)
617		assertTrue(q.contains(it.next()));
574	–	++i;
575	–	}
618		assertEquals(i, SIZE);
619	+	assertIteratorExhausted(it);
620		}
621
622	<	public void testIteratorRemove () {
622	>	/**
623	>	* iterator of empty collection has no elements
624	>	*/
625	>	public void testEmptyIterator() {
626	>	assertIteratorExhausted(new PriorityBlockingQueue().iterator());
627	>	}
628
629	+	/**
630	+	* iterator.remove removes current element
631	+	*/
632	+	public void testIteratorRemove() {
633		final PriorityBlockingQueue q = new PriorityBlockingQueue(3);
582	–
634		q.add(new Integer(2));
635		q.add(new Integer(1));
636		q.add(new Integer(3));
#	Line 594 | Line 645 | public class PriorityBlockingQueueTest e
645		assertFalse(it.hasNext());
646		}
647
648	<
649	<	public void testToString(){
648	>	/**
649	>	* toString contains toStrings of elements
650	>	*/
651	>	public void testToString() {
652		PriorityBlockingQueue q = populatedQueue(SIZE);
653		String s = q.toString();
654		for (int i = 0; i < SIZE; ++i) {
655	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
655	>	assertTrue(s.contains(String.valueOf(i)));
656		}
657	<	}
657	>	}
658
659	+	/**
660	+	* timed poll transfers elements across Executor tasks
661	+	*/
662		public void testPollInExecutor() {
607	–
663		final PriorityBlockingQueue q = new PriorityBlockingQueue(2);
664	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
665	+	final ExecutorService executor = Executors.newFixedThreadPool(2);
666	+	try (PoolCleaner cleaner = cleaner(executor)) {
667	+	executor.execute(new CheckedRunnable() {
668	+	public void realRun() throws InterruptedException {
669	+	assertNull(q.poll());
670	+	threadsStarted.await();
671	+	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
672	+	checkEmpty(q);
673	+	}});
674	+
675	+	executor.execute(new CheckedRunnable() {
676	+	public void realRun() throws InterruptedException {
677	+	threadsStarted.await();
678	+	q.put(one);
679	+	}});
680	+	}
681	+	}
682
683	<	ExecutorService executor = Executors.newFixedThreadPool(2);
683	>	/**
684	>	* A deserialized/reserialized queue has same elements
685	>	*/
686	>	public void testSerialization() throws Exception {
687	>	Queue x = populatedQueue(SIZE);
688	>	Queue y = serialClone(x);
689	>
690	>	assertNotSame(x, y);
691	>	assertEquals(x.size(), y.size());
692	>	while (!x.isEmpty()) {
693	>	assertFalse(y.isEmpty());
694	>	assertEquals(x.remove(), y.remove());
695	>	}
696	>	assertTrue(y.isEmpty());
697	>	}
698
699	<	executor.execute(new Runnable() {
700	<	public void run() {
701	<	threadAssertNull(q.poll());
702	<	try {
703	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
704	<	threadAssertTrue(q.isEmpty());
705	<	}
706	<	catch (InterruptedException e) {
707	<	threadFail("should not be interrupted");
708	<	}
709	<	}
710	<	});
699	>	/**
700	>	* drainTo(c) empties queue into another collection c
701	>	*/
702	>	public void testDrainTo() {
703	>	PriorityBlockingQueue q = populatedQueue(SIZE);
704	>	ArrayList l = new ArrayList();
705	>	q.drainTo(l);
706	>	assertEquals(0, q.size());
707	>	assertEquals(SIZE, l.size());
708	>	for (int i = 0; i < SIZE; ++i)
709	>	assertEquals(l.get(i), new Integer(i));
710	>	q.add(zero);
711	>	q.add(one);
712	>	assertFalse(q.isEmpty());
713	>	assertTrue(q.contains(zero));
714	>	assertTrue(q.contains(one));
715	>	l.clear();
716	>	q.drainTo(l);
717	>	assertEquals(0, q.size());
718	>	assertEquals(2, l.size());
719	>	for (int i = 0; i < 2; ++i)
720	>	assertEquals(l.get(i), new Integer(i));
721	>	}
722
723	<	executor.execute(new Runnable() {
724	<	public void run() {
725	<	try {
726	<	Thread.sleep(SMALL_DELAY_MS);
727	<	q.put(new Integer(1));
728	<	}
729	<	catch (InterruptedException e) {
730	<	threadFail("should not be interrupted");
731	<	}
634	<	}
635	<	});
636	<
637	<	joinPool(executor);
723	>	/**
724	>	* drainTo empties queue
725	>	*/
726	>	public void testDrainToWithActivePut() throws InterruptedException {
727	>	final PriorityBlockingQueue q = populatedQueue(SIZE);
728	>	Thread t = new Thread(new CheckedRunnable() {
729	>	public void realRun() {
730	>	q.put(new Integer(SIZE + 1));
731	>	}});
732
733	+	t.start();
734	+	ArrayList l = new ArrayList();
735	+	q.drainTo(l);
736	+	assertTrue(l.size() >= SIZE);
737	+	for (int i = 0; i < SIZE; ++i)
738	+	assertEquals(l.get(i), new Integer(i));
739	+	t.join();
740	+	assertTrue(q.size() + l.size() >= SIZE);
741		}
742
743	<	public void testSerialization() {
744	<	PriorityBlockingQueue q = populatedQueue(SIZE);
745	<	try {
746	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
747	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
748	<	out.writeObject(q);
749	<	out.close();
750	<
751	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
752	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
753	<	PriorityBlockingQueue r = (PriorityBlockingQueue)in.readObject();
754	<	assertEquals(q.size(), r.size());
755	<	while (!q.isEmpty())
756	<	assertEquals(q.remove(), r.remove());
757	<	} catch(Exception e){
758	<	fail("unexpected exception");
743	>	/**
744	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
745	>	*/
746	>	public void testDrainToN() {
747	>	PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE * 2);
748	>	for (int i = 0; i < SIZE + 2; ++i) {
749	>	for (int j = 0; j < SIZE; j++)
750	>	assertTrue(q.offer(new Integer(j)));
751	>	ArrayList l = new ArrayList();
752	>	q.drainTo(l, i);
753	>	int k = (i < SIZE) ? i : SIZE;
754	>	assertEquals(k, l.size());
755	>	assertEquals(SIZE - k, q.size());
756	>	for (int j = 0; j < k; ++j)
757	>	assertEquals(l.get(j), new Integer(j));
758	>	do {} while (q.poll() != null);
759	>	}
760	>	}
761	>
762	>	/**
763	>	* remove(null), contains(null) always return false
764	>	*/
765	>	public void testNeverContainsNull() {
766	>	Collection<?>[] qs = {
767	>	new PriorityBlockingQueue<Object>(),
768	>	populatedQueue(2),
769	>	};
770	>
771	>	for (Collection<?> q : qs) {
772	>	assertFalse(q.contains(null));
773	>	assertFalse(q.remove(null));
774		}
775		}
776

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