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Comparing jsr166/src/test/tck/LinkedBlockingQueueTest.java (file contents):
Revision 1.18 by jsr166, Sat Nov 21 10:25:05 2009 UTC vs.
Revision 1.81 by jsr166, Thu Sep 5 21:11:13 2019 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	–	import junit.framework.*;
10	–	import java.util.*;
11	–	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.Iterator;
15	>	import java.util.NoSuchElementException;
16	>	import java.util.Queue;
17	>	import java.util.concurrent.BlockingQueue;
18	>	import java.util.concurrent.CountDownLatch;
19	>	import java.util.concurrent.Executors;
20	>	import java.util.concurrent.ExecutorService;
21	>	import java.util.concurrent.LinkedBlockingQueue;
22	>
23	>	import junit.framework.Test;
24
25		public class LinkedBlockingQueueTest extends JSR166TestCase {
26
27	+	public static class Unbounded extends BlockingQueueTest {
28	+	protected BlockingQueue emptyCollection() {
29	+	return new LinkedBlockingQueue();
30	+	}
31	+	}
32	+
33	+	public static class Bounded extends BlockingQueueTest {
34	+	protected BlockingQueue emptyCollection() {
35	+	return new LinkedBlockingQueue(SIZE);
36	+	}
37	+	}
38	+
39		public static void main(String[] args) {
40	<	junit.textui.TestRunner.run (suite());
40	>	main(suite(), args);
41		}
42
43		public static Test suite() {
44	<	return new TestSuite(LinkedBlockingQueueTest.class);
44	>	class Implementation implements CollectionImplementation {
45	>	public Class<?> klazz() { return LinkedBlockingQueue.class; }
46	>	public Collection emptyCollection() { return new LinkedBlockingQueue(); }
47	>	public Object makeElement(int i) { return i; }
48	>	public boolean isConcurrent() { return true; }
49	>	public boolean permitsNulls() { return false; }
50	>	}
51	>	return newTestSuite(LinkedBlockingQueueTest.class,
52	>	new Unbounded().testSuite(),
53	>	new Bounded().testSuite(),
54	>	CollectionTest.testSuite(new Implementation()));
55		}
56
25	–
57		/**
58	<	* Create a queue of given size containing consecutive
59	<	* Integers 0 ... n.
58	>	* Returns a new queue of given size containing consecutive
59	>	* Integers 0 ... n - 1.
60		*/
61	<	private LinkedBlockingQueue populatedQueue(int n) {
62	<	LinkedBlockingQueue q = new LinkedBlockingQueue(n);
61	>	private static LinkedBlockingQueue<Integer> populatedQueue(int n) {
62	>	LinkedBlockingQueue<Integer> q = new LinkedBlockingQueue<>(n);
63		assertTrue(q.isEmpty());
64		for (int i = 0; i < n; i++)
65		assertTrue(q.offer(new Integer(i)));
66		assertFalse(q.isEmpty());
67		assertEquals(0, q.remainingCapacity());
68		assertEquals(n, q.size());
69	+	assertEquals((Integer) 0, q.peek());
70		return q;
71		}
72
#	Line 48 | Line 80 | public class LinkedBlockingQueueTest ext
80		}
81
82		/**
83	<	* Constructor throws IAE if capacity argument nonpositive
83	>	* Constructor throws IllegalArgumentException if capacity argument nonpositive
84		*/
85		public void testConstructor2() {
86		try {
87	<	LinkedBlockingQueue q = new LinkedBlockingQueue(0);
87	>	new LinkedBlockingQueue(0);
88		shouldThrow();
89		} catch (IllegalArgumentException success) {}
90		}
91
92		/**
93	<	* Initializing from null Collection throws NPE
93	>	* Initializing from null Collection throws NullPointerException
94		*/
95		public void testConstructor3() {
96		try {
97	<	LinkedBlockingQueue q = new LinkedBlockingQueue(null);
97	>	new LinkedBlockingQueue(null);
98		shouldThrow();
99		} catch (NullPointerException success) {}
100		}
101
102		/**
103	<	* Initializing from Collection of null elements throws NPE
103	>	* Initializing from Collection of null elements throws NullPointerException
104		*/
105		public void testConstructor4() {
106	+	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
107		try {
108	<	Integer[] ints = new Integer[SIZE];
76	<	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
108	>	new LinkedBlockingQueue(elements);
109		shouldThrow();
110		} catch (NullPointerException success) {}
111		}
112
113		/**
114	<	* Initializing from Collection with some null elements throws NPE
114	>	* Initializing from Collection with some null elements throws
115	>	* NullPointerException
116		*/
117		public void testConstructor5() {
118	+	Integer[] ints = new Integer[SIZE];
119	+	for (int i = 0; i < SIZE - 1; ++i)
120	+	ints[i] = new Integer(i);
121	+	Collection<Integer> elements = Arrays.asList(ints);
122		try {
123	<	Integer[] ints = new Integer[SIZE];
87	<	for (int i = 0; i < SIZE-1; ++i)
88	<	ints[i] = new Integer(i);
89	<	LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints));
123	>	new LinkedBlockingQueue(elements);
124		shouldThrow();
125		} catch (NullPointerException success) {}
126		}
#	Line 122 | Line 156 | public class LinkedBlockingQueueTest ext
156		* remainingCapacity decreases on add, increases on remove
157		*/
158		public void testRemainingCapacity() {
159	<	LinkedBlockingQueue q = populatedQueue(SIZE);
159	>	BlockingQueue q = populatedQueue(SIZE);
160		for (int i = 0; i < SIZE; ++i) {
161		assertEquals(i, q.remainingCapacity());
162	<	assertEquals(SIZE-i, q.size());
163	<	q.remove();
162	>	assertEquals(SIZE, q.size() + q.remainingCapacity());
163	>	assertEquals(i, q.remove());
164		}
165		for (int i = 0; i < SIZE; ++i) {
166	<	assertEquals(SIZE-i, q.remainingCapacity());
167	<	assertEquals(i, q.size());
168	<	q.add(new Integer(i));
166	>	assertEquals(SIZE - i, q.remainingCapacity());
167	>	assertEquals(SIZE, q.size() + q.remainingCapacity());
168	>	assertTrue(q.add(i));
169		}
170		}
171
172		/**
139	–	* offer(null) throws NPE
140	–	*/
141	–	public void testOfferNull() {
142	–	try {
143	–	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
144	–	q.offer(null);
145	–	shouldThrow();
146	–	} catch (NullPointerException success) {}
147	–	}
148	–
149	–	/**
150	–	* add(null) throws NPE
151	–	*/
152	–	public void testAddNull() {
153	–	try {
154	–	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
155	–	q.add(null);
156	–	shouldThrow();
157	–	} catch (NullPointerException success) {}
158	–	}
159	–
160	–	/**
173		* Offer succeeds if not full; fails if full
174		*/
175		public void testOffer() {
#	Line 167 | Line 179 | public class LinkedBlockingQueueTest ext
179		}
180
181		/**
182	<	* add succeeds if not full; throws ISE if full
182	>	* add succeeds if not full; throws IllegalStateException if full
183		*/
184		public void testAdd() {
185	+	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
186	+	for (int i = 0; i < SIZE; ++i)
187	+	assertTrue(q.add(new Integer(i)));
188	+	assertEquals(0, q.remainingCapacity());
189		try {
174	–	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
175	–	for (int i = 0; i < SIZE; ++i) {
176	–	assertTrue(q.add(new Integer(i)));
177	–	}
178	–	assertEquals(0, q.remainingCapacity());
190		q.add(new Integer(SIZE));
191		shouldThrow();
192		} catch (IllegalStateException success) {}
193		}
194
195		/**
196	<	* addAll(null) throws NPE
186	<	*/
187	<	public void testAddAll1() {
188	<	try {
189	<	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
190	<	q.addAll(null);
191	<	shouldThrow();
192	<	} catch (NullPointerException success) {}
193	<	}
194	<
195	<	/**
196	<	* addAll(this) throws IAE
196	>	* addAll(this) throws IllegalArgumentException
197		*/
198		public void testAddAllSelf() {
199	+	LinkedBlockingQueue q = populatedQueue(SIZE);
200		try {
200	–	LinkedBlockingQueue q = populatedQueue(SIZE);
201		q.addAll(q);
202		shouldThrow();
203		} catch (IllegalArgumentException success) {}
204		}
205
206		/**
207	–	* addAll of a collection with null elements throws NPE
208	–	*/
209	–	public void testAddAll2() {
210	–	try {
211	–	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
212	–	Integer[] ints = new Integer[SIZE];
213	–	q.addAll(Arrays.asList(ints));
214	–	shouldThrow();
215	–	} catch (NullPointerException success) {}
216	–	}
217	–	/**
207		* addAll of a collection with any null elements throws NPE after
208		* possibly adding some elements
209		*/
210		public void testAddAll3() {
211	+	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
212	+	Integer[] ints = new Integer[SIZE];
213	+	for (int i = 0; i < SIZE - 1; ++i)
214	+	ints[i] = new Integer(i);
215	+	Collection<Integer> elements = Arrays.asList(ints);
216		try {
217	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
224	<	Integer[] ints = new Integer[SIZE];
225	<	for (int i = 0; i < SIZE-1; ++i)
226	<	ints[i] = new Integer(i);
227	<	q.addAll(Arrays.asList(ints));
217	>	q.addAll(elements);
218		shouldThrow();
219		} catch (NullPointerException success) {}
220		}
221	+
222		/**
223	<	* addAll throws ISE if not enough room
223	>	* addAll throws IllegalStateException if not enough room
224		*/
225		public void testAddAll4() {
226	+	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE - 1);
227	+	Integer[] ints = new Integer[SIZE];
228	+	for (int i = 0; i < SIZE; ++i)
229	+	ints[i] = new Integer(i);
230	+	Collection<Integer> elements = Arrays.asList(ints);
231		try {
232	<	LinkedBlockingQueue q = new LinkedBlockingQueue(1);
237	<	Integer[] ints = new Integer[SIZE];
238	<	for (int i = 0; i < SIZE; ++i)
239	<	ints[i] = new Integer(i);
240	<	q.addAll(Arrays.asList(ints));
232	>	q.addAll(elements);
233		shouldThrow();
234		} catch (IllegalStateException success) {}
235		}
236	+
237		/**
238		* Queue contains all elements, in traversal order, of successful addAll
239		*/
#	Line 257 | Line 250 | public class LinkedBlockingQueueTest ext
250		}
251
252		/**
260	–	* put(null) throws NPE
261	–	*/
262	–	public void testPutNull() throws InterruptedException {
263	–	try {
264	–	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
265	–	q.put(null);
266	–	shouldThrow();
267	–	} catch (NullPointerException success) {}
268	–	}
269	–
270	–	/**
253		* all elements successfully put are contained
254		*/
255		public void testPut() throws InterruptedException {
256		LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
257		for (int i = 0; i < SIZE; ++i) {
258	<	Integer I = new Integer(i);
259	<	q.put(I);
260	<	assertTrue(q.contains(I));
258	>	Integer x = new Integer(i);
259	>	q.put(x);
260	>	assertTrue(q.contains(x));
261		}
262		assertEquals(0, q.remainingCapacity());
263		}
#	Line 284 | Line 266 | public class LinkedBlockingQueueTest ext
266		* put blocks interruptibly if full
267		*/
268		public void testBlockingPut() throws InterruptedException {
269	<	Thread t = new Thread(new CheckedRunnable() {
270	<	public void realRun() {
271	<	int added = 0;
269	>	final LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
270	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
271	>	Thread t = newStartedThread(new CheckedRunnable() {
272	>	public void realRun() throws InterruptedException {
273	>	for (int i = 0; i < SIZE; ++i)
274	>	q.put(i);
275	>	assertEquals(SIZE, q.size());
276	>	assertEquals(0, q.remainingCapacity());
277	>
278	>	Thread.currentThread().interrupt();
279		try {
280	<	LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE);
281	<	for (int i = 0; i < SIZE; ++i) {
282	<	q.put(new Integer(i));
283	<	++added;
284	<	}
285	<	q.put(new Integer(SIZE));
286	<	threadShouldThrow();
287	<	} catch (InterruptedException success) {
288	<	threadAssertEquals(added, SIZE);
289	<	}
280	>	q.put(99);
281	>	shouldThrow();
282	>	} catch (InterruptedException success) {}
283	>	assertFalse(Thread.interrupted());
284	>
285	>	pleaseInterrupt.countDown();
286	>	try {
287	>	q.put(99);
288	>	shouldThrow();
289	>	} catch (InterruptedException success) {}
290	>	assertFalse(Thread.interrupted());
291		}});
292
293	<	t.start();
294	<	Thread.sleep(SHORT_DELAY_MS);
293	>	await(pleaseInterrupt);
294	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
295		t.interrupt();
296	<	t.join();
296	>	awaitTermination(t);
297	>	assertEquals(SIZE, q.size());
298	>	assertEquals(0, q.remainingCapacity());
299		}
300
301		/**
302	<	* put blocks waiting for take when full
302	>	* put blocks interruptibly waiting for take when full
303		*/
304		public void testPutWithTake() throws InterruptedException {
305	+	final int capacity = 2;
306		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
307	<	Thread t = new Thread(new CheckedRunnable() {
308	<	public void realRun() {
309	<	int added = 0;
307	>	final CountDownLatch pleaseTake = new CountDownLatch(1);
308	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
309	>	Thread t = newStartedThread(new CheckedRunnable() {
310	>	public void realRun() throws InterruptedException {
311	>	for (int i = 0; i < capacity; i++)
312	>	q.put(i);
313	>	pleaseTake.countDown();
314	>	q.put(86);
315	>
316	>	Thread.currentThread().interrupt();
317	>	try {
318	>	q.put(99);
319	>	shouldThrow();
320	>	} catch (InterruptedException success) {}
321	>	assertFalse(Thread.interrupted());
322	>
323	>	pleaseInterrupt.countDown();
324		try {
325	<	q.put(new Object());
326	<	++added;
327	<	q.put(new Object());
328	<	++added;
322	<	q.put(new Object());
323	<	++added;
324	<	q.put(new Object());
325	<	++added;
326	<	threadShouldThrow();
327	<	} catch (InterruptedException success) {
328	<	threadAssertTrue(added >= 2);
329	<	}
325	>	q.put(99);
326	>	shouldThrow();
327	>	} catch (InterruptedException success) {}
328	>	assertFalse(Thread.interrupted());
329		}});
330
331	<	t.start();
332	<	Thread.sleep(SHORT_DELAY_MS);
333	<	q.take();
331	>	await(pleaseTake);
332	>	assertEquals(0, q.remainingCapacity());
333	>	assertEquals(0, q.take());
334	>
335	>	await(pleaseInterrupt);
336	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
337		t.interrupt();
338	<	t.join();
338	>	awaitTermination(t);
339	>	assertEquals(0, q.remainingCapacity());
340		}
341
342		/**
343		* timed offer times out if full and elements not taken
344		*/
345	<	public void testTimedOffer() throws InterruptedException {
345	>	public void testTimedOffer() {
346		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
347	<	Thread t = new ThreadShouldThrow(InterruptedException.class) {
347	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
348	>	Thread t = newStartedThread(new CheckedRunnable() {
349		public void realRun() throws InterruptedException {
350		q.put(new Object());
351		q.put(new Object());
352	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
349	<	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
350	<	}};
352	>	long startTime = System.nanoTime();
353
354	<	t.start();
355	<	Thread.sleep(SMALL_DELAY_MS);
354	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
355	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
356	>
357	>	Thread.currentThread().interrupt();
358	>	try {
359	>	q.offer(new Object(), randomTimeout(), randomTimeUnit());
360	>	shouldThrow();
361	>	} catch (InterruptedException success) {}
362	>	assertFalse(Thread.interrupted());
363	>
364	>	pleaseInterrupt.countDown();
365	>	try {
366	>	q.offer(new Object(), LONGER_DELAY_MS, MILLISECONDS);
367	>	shouldThrow();
368	>	} catch (InterruptedException success) {}
369	>	assertFalse(Thread.interrupted());
370	>	}});
371	>
372	>	await(pleaseInterrupt);
373	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
374		t.interrupt();
375	<	t.join();
375	>	awaitTermination(t);
376		}
377
378		/**
#	Line 361 | Line 381 | public class LinkedBlockingQueueTest ext
381		public void testTake() throws InterruptedException {
382		LinkedBlockingQueue q = populatedQueue(SIZE);
383		for (int i = 0; i < SIZE; ++i) {
384	<	assertEquals(i, ((Integer)q.take()).intValue());
384	>	assertEquals(i, q.take());
385		}
386		}
387
388		/**
369	–	* take blocks interruptibly when empty
370	–	*/
371	–	public void testTakeFromEmpty() throws InterruptedException {
372	–	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
373	–	Thread t = new ThreadShouldThrow(InterruptedException.class) {
374	–	public void realRun() throws InterruptedException {
375	–	q.take();
376	–	}};
377	–
378	–	t.start();
379	–	Thread.sleep(SHORT_DELAY_MS);
380	–	t.interrupt();
381	–	t.join();
382	–	}
383	–
384	–	/**
389		* Take removes existing elements until empty, then blocks interruptibly
390		*/
391		public void testBlockingTake() throws InterruptedException {
392	<	Thread t = new ThreadShouldThrow(InterruptedException.class) {
392	>	final BlockingQueue q = populatedQueue(SIZE);
393	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
394	>	Thread t = newStartedThread(new CheckedRunnable() {
395		public void realRun() throws InterruptedException {
396	<	LinkedBlockingQueue q = populatedQueue(SIZE);
391	<	for (int i = 0; i < SIZE; ++i) {
392	<	assertEquals(i, ((Integer)q.take()).intValue());
393	<	}
394	<	q.take();
395	<	}};
396	>	for (int i = 0; i < SIZE; i++) assertEquals(i, q.take());
397
398	<	t.start();
399	<	Thread.sleep(SHORT_DELAY_MS);
398	>	Thread.currentThread().interrupt();
399	>	try {
400	>	q.take();
401	>	shouldThrow();
402	>	} catch (InterruptedException success) {}
403	>	assertFalse(Thread.interrupted());
404	>
405	>	pleaseInterrupt.countDown();
406	>	try {
407	>	q.take();
408	>	shouldThrow();
409	>	} catch (InterruptedException success) {}
410	>	assertFalse(Thread.interrupted());
411	>	}});
412	>
413	>	await(pleaseInterrupt);
414	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
415		t.interrupt();
416	<	t.join();
416	>	awaitTermination(t);
417		}
418
403	–
419		/**
420		* poll succeeds unless empty
421		*/
422		public void testPoll() {
423		LinkedBlockingQueue q = populatedQueue(SIZE);
424		for (int i = 0; i < SIZE; ++i) {
425	<	assertEquals(i, ((Integer)q.poll()).intValue());
425	>	assertEquals(i, q.poll());
426		}
427		assertNull(q.poll());
428		}
429
430		/**
431	<	* timed pool with zero timeout succeeds when non-empty, else times out
431	>	* timed poll with zero timeout succeeds when non-empty, else times out
432		*/
433		public void testTimedPoll0() throws InterruptedException {
434		LinkedBlockingQueue q = populatedQueue(SIZE);
435		for (int i = 0; i < SIZE; ++i) {
436	<	assertEquals(i, ((Integer)q.poll(0, MILLISECONDS)).intValue());
436	>	assertEquals(i, q.poll(0, MILLISECONDS));
437		}
438		assertNull(q.poll(0, MILLISECONDS));
439		}
440
441		/**
442	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
442	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
443		*/
444		public void testTimedPoll() throws InterruptedException {
445	<	LinkedBlockingQueue q = populatedQueue(SIZE);
445	>	LinkedBlockingQueue<Integer> q = populatedQueue(SIZE);
446		for (int i = 0; i < SIZE; ++i) {
447	<	assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, MILLISECONDS)).intValue());
448	<	}
449	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
447	>	long startTime = System.nanoTime();
448	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
449	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
450	>	}
451	>	long startTime = System.nanoTime();
452	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
453	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
454	>	checkEmpty(q);
455		}
456
457		/**
#	Line 439 | Line 459 | public class LinkedBlockingQueueTest ext
459		* returning timeout status
460		*/
461		public void testInterruptedTimedPoll() throws InterruptedException {
462	<	Thread t = new ThreadShouldThrow(InterruptedException.class) {
462	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
463	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
464	>	Thread t = newStartedThread(new CheckedRunnable() {
465		public void realRun() throws InterruptedException {
466	<	LinkedBlockingQueue q = populatedQueue(SIZE);
467	<	for (int i = 0; i < SIZE; ++i) {
446	<	threadAssertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, MILLISECONDS)).intValue());
447	<	}
448	<	q.poll(SMALL_DELAY_MS, MILLISECONDS);
449	<	}};
466	>	for (int i = 0; i < SIZE; i++)
467	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
468
469	<	t.start();
470	<	Thread.sleep(SHORT_DELAY_MS);
471	<	t.interrupt();
472	<	t.join();
473	<	}
469	>	Thread.currentThread().interrupt();
470	>	try {
471	>	q.poll(randomTimeout(), randomTimeUnit());
472	>	shouldThrow();
473	>	} catch (InterruptedException success) {}
474	>	assertFalse(Thread.interrupted());
475
476	<	/**
477	<	*  timed poll before a delayed offer fails; after offer succeeds;
478	<	*  on interruption throws
479	<	*/
480	<	public void testTimedPollWithOffer() throws InterruptedException {
481	<	final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
482	<	Thread t = new ThreadShouldThrow(InterruptedException.class) {
464	<	public void realRun() throws InterruptedException {
465	<	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
466	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
467	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
468	<	}};
476	>	pleaseInterrupt.countDown();
477	>	try {
478	>	q.poll(LONGER_DELAY_MS, MILLISECONDS);
479	>	shouldThrow();
480	>	} catch (InterruptedException success) {}
481	>	assertFalse(Thread.interrupted());
482	>	}});
483
484	<	t.start();
485	<	Thread.sleep(SMALL_DELAY_MS);
472	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
484	>	await(pleaseInterrupt);
485	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
486		t.interrupt();
487	<	t.join();
487	>	awaitTermination(t);
488	>	checkEmpty(q);
489		}
490
491		/**
#	Line 480 | Line 494 | public class LinkedBlockingQueueTest ext
494		public void testPeek() {
495		LinkedBlockingQueue q = populatedQueue(SIZE);
496		for (int i = 0; i < SIZE; ++i) {
497	<	assertEquals(i, ((Integer)q.peek()).intValue());
498	<	q.poll();
497	>	assertEquals(i, q.peek());
498	>	assertEquals(i, q.poll());
499		assertTrue(q.peek() == null ||
500	<	i != ((Integer)q.peek()).intValue());
500	>	!q.peek().equals(i));
501		}
502		assertNull(q.peek());
503		}
#	Line 494 | Line 508 | public class LinkedBlockingQueueTest ext
508		public void testElement() {
509		LinkedBlockingQueue q = populatedQueue(SIZE);
510		for (int i = 0; i < SIZE; ++i) {
511	<	assertEquals(i, ((Integer)q.element()).intValue());
512	<	q.poll();
511	>	assertEquals(i, q.element());
512	>	assertEquals(i, q.poll());
513		}
514		try {
515		q.element();
#	Line 509 | Line 523 | public class LinkedBlockingQueueTest ext
523		public void testRemove() {
524		LinkedBlockingQueue q = populatedQueue(SIZE);
525		for (int i = 0; i < SIZE; ++i) {
526	<	assertEquals(i, ((Integer)q.remove()).intValue());
526	>	assertEquals(i, q.remove());
527		}
528		try {
529		q.remove();
#	Line 518 | Line 532 | public class LinkedBlockingQueueTest ext
532		}
533
534		/**
521	–	* remove(x) removes x and returns true if present
522	–	*/
523	–	public void testRemoveElement() {
524	–	LinkedBlockingQueue q = populatedQueue(SIZE);
525	–	for (int i = 1; i < SIZE; i+=2) {
526	–	assertTrue(q.remove(new Integer(i)));
527	–	}
528	–	for (int i = 0; i < SIZE; i+=2) {
529	–	assertTrue(q.remove(new Integer(i)));
530	–	assertFalse(q.remove(new Integer(i+1)));
531	–	}
532	–	assertTrue(q.isEmpty());
533	–	}
534	–
535	–	/**
535		* An add following remove(x) succeeds
536		*/
537		public void testRemoveElementAndAdd() throws InterruptedException {
#	Line 542 | Line 541 | public class LinkedBlockingQueueTest ext
541		assertTrue(q.remove(new Integer(1)));
542		assertTrue(q.remove(new Integer(2)));
543		assertTrue(q.add(new Integer(3)));
544	<	assertTrue(q.take() != null);
544	>	assertNotNull(q.take());
545		}
546
547		/**
#	Line 601 | Line 600 | public class LinkedBlockingQueueTest ext
600		assertTrue(changed);
601
602		assertTrue(q.containsAll(p));
603	<	assertEquals(SIZE-i, q.size());
603	>	assertEquals(SIZE - i, q.size());
604		p.remove();
605		}
606		}
#	Line 614 | Line 613 | public class LinkedBlockingQueueTest ext
613		LinkedBlockingQueue q = populatedQueue(SIZE);
614		LinkedBlockingQueue p = populatedQueue(i);
615		assertTrue(q.removeAll(p));
616	<	assertEquals(SIZE-i, q.size());
616	>	assertEquals(SIZE - i, q.size());
617		for (int j = 0; j < i; ++j) {
618	<	Integer I = (Integer)(p.remove());
619	<	assertFalse(q.contains(I));
618	>	Integer x = (Integer)(p.remove());
619	>	assertFalse(q.contains(x));
620		}
621		}
622		}
623
624		/**
625	<	* toArray contains all elements
625	>	* toArray contains all elements in FIFO order
626		*/
627	<	public void testToArray() throws InterruptedException {
627	>	public void testToArray() {
628		LinkedBlockingQueue q = populatedQueue(SIZE);
629	<	Object[] o = q.toArray();
630	<	for (int i = 0; i < o.length; i++)
631	<	assertEquals(o[i], q.take());
629	>	Object[] a = q.toArray();
630	>	assertSame(Object[].class, a.getClass());
631	>	for (Object o : a)
632	>	assertSame(o, q.poll());
633	>	assertTrue(q.isEmpty());
634		}
635
636		/**
637	<	* toArray(a) contains all elements
637	>	* toArray(a) contains all elements in FIFO order
638		*/
639		public void testToArray2() throws InterruptedException {
640	<	LinkedBlockingQueue q = populatedQueue(SIZE);
640	>	LinkedBlockingQueue<Integer> q = populatedQueue(SIZE);
641		Integer[] ints = new Integer[SIZE];
642	<	ints = (Integer[])q.toArray(ints);
643	<	for (int i = 0; i < ints.length; i++)
644	<	assertEquals(ints[i], q.take());
645	<	}
646	<
646	<	/**
647	<	* toArray(null) throws NPE
648	<	*/
649	<	public void testToArray_BadArg() {
650	<	try {
651	<	LinkedBlockingQueue q = populatedQueue(SIZE);
652	<	Object o[] = q.toArray(null);
653	<	shouldThrow();
654	<	} catch (NullPointerException success) {}
642	>	Integer[] array = q.toArray(ints);
643	>	assertSame(ints, array);
644	>	for (Integer o : ints)
645	>	assertSame(o, q.poll());
646	>	assertTrue(q.isEmpty());
647		}
648
649		/**
650	<	* toArray with incompatible array type throws CCE
650	>	* toArray(incompatible array type) throws ArrayStoreException
651		*/
652		public void testToArray1_BadArg() {
653	+	LinkedBlockingQueue q = populatedQueue(SIZE);
654		try {
655	<	LinkedBlockingQueue q = populatedQueue(SIZE);
663	<	Object o[] = q.toArray(new String[10] );
655	>	q.toArray(new String[10]);
656		shouldThrow();
657		} catch (ArrayStoreException success) {}
658		}
659
668	–
660		/**
661		* iterator iterates through all elements
662		*/
663		public void testIterator() throws InterruptedException {
664		LinkedBlockingQueue q = populatedQueue(SIZE);
665		Iterator it = q.iterator();
666	<	while (it.hasNext()) {
666	>	int i;
667	>	for (i = 0; it.hasNext(); i++)
668	>	assertTrue(q.contains(it.next()));
669	>	assertEquals(i, SIZE);
670	>	assertIteratorExhausted(it);
671	>
672	>	it = q.iterator();
673	>	for (i = 0; it.hasNext(); i++)
674		assertEquals(it.next(), q.take());
675	<	}
675	>	assertEquals(i, SIZE);
676	>	assertIteratorExhausted(it);
677	>	}
678	>
679	>	/**
680	>	* iterator of empty collection has no elements
681	>	*/
682	>	public void testEmptyIterator() {
683	>	assertIteratorExhausted(new LinkedBlockingQueue().iterator());
684		}
685
686		/**
687		* iterator.remove removes current element
688		*/
689	<	public void testIteratorRemove () {
689	>	public void testIteratorRemove() {
690		final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
691		q.add(two);
692		q.add(one);
#	Line 691 | Line 697 | public class LinkedBlockingQueueTest ext
697		it.remove();
698
699		it = q.iterator();
700	<	assertEquals(it.next(), one);
701	<	assertEquals(it.next(), three);
700	>	assertSame(it.next(), one);
701	>	assertSame(it.next(), three);
702		assertFalse(it.hasNext());
703		}
704
699	–
705		/**
706		* iterator ordering is FIFO
707		*/
#	Line 708 | Line 713 | public class LinkedBlockingQueueTest ext
713		assertEquals(0, q.remainingCapacity());
714		int k = 0;
715		for (Iterator it = q.iterator(); it.hasNext();) {
716	<	int i = ((Integer)(it.next())).intValue();
712	<	assertEquals(++k, i);
716	>	assertEquals(++k, it.next());
717		}
718		assertEquals(3, k);
719		}
#	Line 717 | Line 721 | public class LinkedBlockingQueueTest ext
721		/**
722		* Modifications do not cause iterators to fail
723		*/
724	<	public void testWeaklyConsistentIteration () {
724	>	public void testWeaklyConsistentIteration() {
725		final LinkedBlockingQueue q = new LinkedBlockingQueue(3);
726		q.add(one);
727		q.add(two);
#	Line 729 | Line 733 | public class LinkedBlockingQueueTest ext
733		assertEquals(0, q.size());
734		}
735
732	–
736		/**
737		* toString contains toStrings of elements
738		*/
#	Line 737 | Line 740 | public class LinkedBlockingQueueTest ext
740		LinkedBlockingQueue q = populatedQueue(SIZE);
741		String s = q.toString();
742		for (int i = 0; i < SIZE; ++i) {
743	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
743	>	assertTrue(s.contains(String.valueOf(i)));
744		}
745		}
746
744	–
747		/**
748		* offer transfers elements across Executor tasks
749		*/
#	Line 749 | Line 751 | public class LinkedBlockingQueueTest ext
751		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
752		q.add(one);
753		q.add(two);
754	<	ExecutorService executor = Executors.newFixedThreadPool(2);
755	<	executor.execute(new CheckedRunnable() {
756	<	public void realRun() throws InterruptedException {
757	<	threadAssertFalse(q.offer(three));
758	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, MILLISECONDS));
759	<	threadAssertEquals(0, q.remainingCapacity());
760	<	}});
761	<
762	<	executor.execute(new CheckedRunnable() {
763	<	public void realRun() throws InterruptedException {
764	<	Thread.sleep(SMALL_DELAY_MS);
765	<	threadAssertEquals(one, q.take());
766	<	}});
767	<
768	<	joinPool(executor);
754	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
755	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
756	>	try (PoolCleaner cleaner = cleaner(executor)) {
757	>	executor.execute(new CheckedRunnable() {
758	>	public void realRun() throws InterruptedException {
759	>	assertFalse(q.offer(three));
760	>	threadsStarted.await();
761	>	assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS));
762	>	assertEquals(0, q.remainingCapacity());
763	>	}});
764	>
765	>	executor.execute(new CheckedRunnable() {
766	>	public void realRun() throws InterruptedException {
767	>	threadsStarted.await();
768	>	assertSame(one, q.take());
769	>	}});
770	>	}
771		}
772
773		/**
774	<	* poll retrieves elements across Executor threads
774	>	* timed poll retrieves elements across Executor threads
775		*/
776		public void testPollInExecutor() {
777		final LinkedBlockingQueue q = new LinkedBlockingQueue(2);
778	<	ExecutorService executor = Executors.newFixedThreadPool(2);
779	<	executor.execute(new CheckedRunnable() {
780	<	public void realRun() throws InterruptedException {
781	<	threadAssertNull(q.poll());
782	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
783	<	threadAssertTrue(q.isEmpty());
784	<	}});
785	<
786	<	executor.execute(new CheckedRunnable() {
787	<	public void realRun() throws InterruptedException {
788	<	Thread.sleep(SMALL_DELAY_MS);
789	<	q.put(one);
790	<	}});
791	<
792	<	joinPool(executor);
778	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
779	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
780	>	try (PoolCleaner cleaner = cleaner(executor)) {
781	>	executor.execute(new CheckedRunnable() {
782	>	public void realRun() throws InterruptedException {
783	>	assertNull(q.poll());
784	>	threadsStarted.await();
785	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
786	>	checkEmpty(q);
787	>	}});
788	>
789	>	executor.execute(new CheckedRunnable() {
790	>	public void realRun() throws InterruptedException {
791	>	threadsStarted.await();
792	>	q.put(one);
793	>	}});
794	>	}
795		}
796
797		/**
798	<	* A deserialized serialized queue has same elements in same order
798	>	* A deserialized/reserialized queue has same elements in same order
799		*/
800		public void testSerialization() throws Exception {
801	<	LinkedBlockingQueue q = populatedQueue(SIZE);
802	<
797	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
798	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
799	<	out.writeObject(q);
800	<	out.close();
801	<
802	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
803	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
804	<	LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject();
805	<	assertEquals(q.size(), r.size());
806	<	while (!q.isEmpty())
807	<	assertEquals(q.remove(), r.remove());
808	<	}
801	>	Queue x = populatedQueue(SIZE);
802	>	Queue y = serialClone(x);
803
804	<	/**
805	<	* drainTo(null) throws NPE
806	<	*/
807	<	public void testDrainToNull() {
808	<	LinkedBlockingQueue q = populatedQueue(SIZE);
809	<	try {
810	<	q.drainTo(null);
811	<	shouldThrow();
812	<	} catch (NullPointerException success) {}
819	<	}
820	<
821	<	/**
822	<	* drainTo(this) throws IAE
823	<	*/
824	<	public void testDrainToSelf() {
825	<	LinkedBlockingQueue q = populatedQueue(SIZE);
826	<	try {
827	<	q.drainTo(q);
828	<	shouldThrow();
829	<	} catch (IllegalArgumentException success) {}
804	>	assertNotSame(x, y);
805	>	assertEquals(x.size(), y.size());
806	>	assertEquals(x.toString(), y.toString());
807	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
808	>	while (!x.isEmpty()) {
809	>	assertFalse(y.isEmpty());
810	>	assertEquals(x.remove(), y.remove());
811	>	}
812	>	assertTrue(y.isEmpty());
813		}
814
815		/**
#	Line 836 | Line 819 | public class LinkedBlockingQueueTest ext
819		LinkedBlockingQueue q = populatedQueue(SIZE);
820		ArrayList l = new ArrayList();
821		q.drainTo(l);
822	<	assertEquals(q.size(), 0);
823	<	assertEquals(l.size(), SIZE);
822	>	assertEquals(0, q.size());
823	>	assertEquals(SIZE, l.size());
824		for (int i = 0; i < SIZE; ++i)
825		assertEquals(l.get(i), new Integer(i));
826		q.add(zero);
#	Line 847 | Line 830 | public class LinkedBlockingQueueTest ext
830		assertTrue(q.contains(one));
831		l.clear();
832		q.drainTo(l);
833	<	assertEquals(q.size(), 0);
834	<	assertEquals(l.size(), 2);
833	>	assertEquals(0, q.size());
834	>	assertEquals(2, l.size());
835		for (int i = 0; i < 2; ++i)
836		assertEquals(l.get(i), new Integer(i));
837		}
#	Line 860 | Line 843 | public class LinkedBlockingQueueTest ext
843		final LinkedBlockingQueue q = populatedQueue(SIZE);
844		Thread t = new Thread(new CheckedRunnable() {
845		public void realRun() throws InterruptedException {
846	<	q.put(new Integer(SIZE+1));
846	>	q.put(new Integer(SIZE + 1));
847		}});
848
849		t.start();
#	Line 874 | Line 857 | public class LinkedBlockingQueueTest ext
857		}
858
859		/**
860	<	* drainTo(null, n) throws NPE
878	<	*/
879	<	public void testDrainToNullN() {
880	<	LinkedBlockingQueue q = populatedQueue(SIZE);
881	<	try {
882	<	q.drainTo(null, 0);
883	<	shouldThrow();
884	<	} catch (NullPointerException success) {}
885	<	}
886	<
887	<	/**
888	<	* drainTo(this, n) throws IAE
889	<	*/
890	<	public void testDrainToSelfN() {
891	<	LinkedBlockingQueue q = populatedQueue(SIZE);
892	<	try {
893	<	q.drainTo(q, 0);
894	<	shouldThrow();
895	<	} catch (IllegalArgumentException success) {}
896	<	}
897	<
898	<	/**
899	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
860	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
861		*/
862		public void testDrainToN() {
863		LinkedBlockingQueue q = new LinkedBlockingQueue();
#	Line 905 | Line 866 | public class LinkedBlockingQueueTest ext
866		assertTrue(q.offer(new Integer(j)));
867		ArrayList l = new ArrayList();
868		q.drainTo(l, i);
869	<	int k = (i < SIZE)? i : SIZE;
870	<	assertEquals(l.size(), k);
871	<	assertEquals(q.size(), SIZE-k);
869	>	int k = (i < SIZE) ? i : SIZE;
870	>	assertEquals(k, l.size());
871	>	assertEquals(SIZE - k, q.size());
872		for (int j = 0; j < k; ++j)
873		assertEquals(l.get(j), new Integer(j));
874	<	while (q.poll() != null) ;
874	>	do {} while (q.poll() != null);
875	>	}
876	>	}
877	>
878	>	/**
879	>	* remove(null), contains(null) always return false
880	>	*/
881	>	public void testNeverContainsNull() {
882	>	Collection<?>[] qs = {
883	>	new LinkedBlockingQueue<Object>(),
884	>	populatedQueue(2),
885	>	};
886	>
887	>	for (Collection<?> q : qs) {
888	>	assertFalse(q.contains(null));
889	>	assertFalse(q.remove(null));
890		}
891		}
892

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