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

Comparing jsr166/src/test/tck/LinkedTransferQueueTest.java (file contents):
Revision 1.12 by jsr166, Sat Aug 15 00:35:01 2009 UTC vs.
Revision 1.47 by jsr166, Mon May 30 22:43:20 2011 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 John Vint
6		*/
7
#	Line 13 | Line 13 | import java.io.ObjectInputStream;
13		import java.io.ObjectOutputStream;
14		import java.util.ArrayList;
15		import java.util.Arrays;
16	<	import java.util.ConcurrentModificationException;
16	>	import java.util.Collection;
17		import java.util.Iterator;
18		import java.util.List;
19		import java.util.NoSuchElementException;
20	<	import java.util.concurrent.*;
20	>	import java.util.concurrent.BlockingQueue;
21	>	import java.util.concurrent.CountDownLatch;
22	>	import java.util.concurrent.Executors;
23	>	import java.util.concurrent.ExecutorService;
24	>	import java.util.concurrent.LinkedTransferQueue;
25		import static java.util.concurrent.TimeUnit.MILLISECONDS;
26	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
27		import junit.framework.Test;
28		import junit.framework.TestSuite;
29
30		@SuppressWarnings({"unchecked", "rawtypes"})
31		public class LinkedTransferQueueTest extends JSR166TestCase {
32
33	+	public static class Generic extends BlockingQueueTest {
34	+	protected BlockingQueue emptyCollection() {
35	+	return new LinkedTransferQueue();
36	+	}
37	+	}
38	+
39		public static void main(String[] args) {
40		junit.textui.TestRunner.run(suite());
41		}
42
43		public static Test suite() {
44	<	return new TestSuite(LinkedTransferQueueTest.class);
45	<	}
35	<
36	<	void checkEmpty(LinkedTransferQueue q) throws InterruptedException {
37	<	assertTrue(q.isEmpty());
38	<	assertEquals(0, q.size());
39	<	assertNull(q.peek());
40	<	assertNull(q.poll());
41	<	assertNull(q.poll(0, MILLISECONDS));
42	<	assertEquals(q.toString(), "[]");
43	<	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
44	<	assertFalse(q.iterator().hasNext());
45	<	try {
46	<	q.element();
47	<	shouldThrow();
48	<	} catch (NoSuchElementException success) {
49	<	}
50	<	try {
51	<	q.iterator().next();
52	<	shouldThrow();
53	<	} catch (NoSuchElementException success) {
54	<	}
55	<	try {
56	<	q.remove();
57	<	shouldThrow();
58	<	} catch (NoSuchElementException success) {
59	<	}
44	>	return newTestSuite(LinkedTransferQueueTest.class,
45	>	new Generic().testSuite());
46		}
47
48		/**
#	Line 76 | Line 62 | public class LinkedTransferQueueTest ext
62		try {
63		new LinkedTransferQueue(null);
64		shouldThrow();
65	<	} catch (NullPointerException success) {
80	<	}
65	>	} catch (NullPointerException success) {}
66		}
67
68		/**
#	Line 85 | Line 70 | public class LinkedTransferQueueTest ext
70		* NullPointerException
71		*/
72		public void testConstructor3() {
73	+	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
74		try {
75	<	Integer[] ints = new Integer[SIZE];
90	<	new LinkedTransferQueue(Arrays.asList(ints));
75	>	new LinkedTransferQueue(elements);
76		shouldThrow();
77	<	} catch (NullPointerException success) {
93	<	}
77	>	} catch (NullPointerException success) {}
78		}
79
80		/**
#	Line 98 | Line 82 | public class LinkedTransferQueueTest ext
82		* throws NullPointerException
83		*/
84		public void testConstructor4() {
85	+	Integer[] ints = new Integer[SIZE];
86	+	for (int i = 0; i < SIZE-1; ++i)
87	+	ints[i] = i;
88	+	Collection<Integer> elements = Arrays.asList(ints);
89		try {
90	<	Integer[] ints = new Integer[SIZE];
103	<	for (int i = 0; i < SIZE - 1; ++i) {
104	<	ints[i] = i;
105	<	}
106	<	new LinkedTransferQueue(Arrays.asList(ints));
90	>	new LinkedTransferQueue(elements);
91		shouldThrow();
92	<	} catch (NullPointerException success) {
109	<	}
92	>	} catch (NullPointerException success) {}
93		}
94
95		/**
#	Line 151 | Line 134 | public class LinkedTransferQueueTest ext
134		}
135
136		/**
154	–	* offer(null) throws NullPointerException
155	–	*/
156	–	public void testOfferNull() {
157	–	try {
158	–	LinkedTransferQueue q = new LinkedTransferQueue();
159	–	q.offer(null);
160	–	shouldThrow();
161	–	} catch (NullPointerException success) {
162	–	}
163	–	}
164	–
165	–	/**
166	–	* add(null) throws NullPointerException
167	–	*/
168	–	public void testAddNull() {
169	–	try {
170	–	LinkedTransferQueue q = new LinkedTransferQueue();
171	–	q.add(null);
172	–	shouldThrow();
173	–	} catch (NullPointerException success) {
174	–	}
175	–	}
176	–
177	–	/**
178	–	* addAll(null) throws NullPointerException
179	–	*/
180	–	public void testAddAll1() {
181	–	try {
182	–	LinkedTransferQueue q = new LinkedTransferQueue();
183	–	q.addAll(null);
184	–	shouldThrow();
185	–	} catch (NullPointerException success) {
186	–	}
187	–	}
188	–
189	–	/**
137		* addAll(this) throws IllegalArgumentException
138		*/
139		public void testAddAllSelf() {
#	Line 194 | Line 141 | public class LinkedTransferQueueTest ext
141		LinkedTransferQueue q = populatedQueue(SIZE);
142		q.addAll(q);
143		shouldThrow();
144	<	} catch (IllegalArgumentException success) {
198	<	}
199	<	}
200	<
201	<	/**
202	<	* addAll of a collection with null elements throws NullPointerException
203	<	*/
204	<	public void testAddAll2() {
205	<	try {
206	<	LinkedTransferQueue q = new LinkedTransferQueue();
207	<	Integer[] ints = new Integer[SIZE];
208	<	q.addAll(Arrays.asList(ints));
209	<	shouldThrow();
210	<	} catch (NullPointerException success) {
211	<	}
144	>	} catch (IllegalArgumentException success) {}
145		}
146
147		/**
#	Line 224 | Line 157 | public class LinkedTransferQueueTest ext
157		}
158		q.addAll(Arrays.asList(ints));
159		shouldThrow();
160	<	} catch (NullPointerException success) {
228	<	}
160	>	} catch (NullPointerException success) {}
161		}
162
163		/**
#	Line 246 | Line 178 | public class LinkedTransferQueueTest ext
178		}
179
180		/**
249	–	* put(null) throws NullPointerException
250	–	*/
251	–	public void testPutNull() throws InterruptedException {
252	–	try {
253	–	LinkedTransferQueue q = new LinkedTransferQueue();
254	–	q.put(null);
255	–	shouldThrow();
256	–	} catch (NullPointerException success) {}
257	–	}
258	–
259	–	/**
181		* all elements successfully put are contained
182		*/
183		public void testPut() {
#	Line 279 | Line 200 | public class LinkedTransferQueueTest ext
200		}
201
202		/**
203	<	* take blocks interruptibly when empty
283	<	*/
284	<	public void testTakeFromEmpty() throws InterruptedException {
285	<	final LinkedTransferQueue q = new LinkedTransferQueue();
286	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
287	<	void realRun() throws InterruptedException {
288	<	q.take();
289	<	}});
290	<	Thread.sleep(SHORT_DELAY_MS);
291	<	t.interrupt();
292	<	t.join();
293	<	}
294	<
295	<	/**
296	<	* Take removes existing elements until empty, then blocks interruptibly
203	>	* take removes existing elements until empty, then blocks interruptibly
204		*/
205		public void testBlockingTake() throws InterruptedException {
206	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
207	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
208	<	void realRun() throws InterruptedException {
206	>	final BlockingQueue q = populatedQueue(SIZE);
207	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
208	>	Thread t = newStartedThread(new CheckedRunnable() {
209	>	public void realRun() throws InterruptedException {
210		for (int i = 0; i < SIZE; ++i) {
211	<	threadAssertEquals(i, (int) q.take());
211	>	assertEquals(i, q.take());
212		}
213	<	q.take();
213	>
214	>	Thread.currentThread().interrupt();
215	>	try {
216	>	q.take();
217	>	shouldThrow();
218	>	} catch (InterruptedException success) {}
219	>	assertFalse(Thread.interrupted());
220	>
221	>	pleaseInterrupt.countDown();
222	>	try {
223	>	q.take();
224	>	shouldThrow();
225	>	} catch (InterruptedException success) {}
226	>	assertFalse(Thread.interrupted());
227		}});
228	<	Thread.sleep(SMALL_DELAY_MS);
228	>
229	>	await(pleaseInterrupt);
230	>	assertThreadStaysAlive(t);
231		t.interrupt();
232	<	t.join();
310	<	checkEmpty(q);
232	>	awaitTermination(t);
233		}
234
235		/**
#	Line 323 | Line 245 | public class LinkedTransferQueueTest ext
245		}
246
247		/**
248	<	* timed pool with zero timeout succeeds when non-empty, else times out
248	>	* timed poll with zero timeout succeeds when non-empty, else times out
249		*/
250		public void testTimedPoll0() throws InterruptedException {
251		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
#	Line 335 | Line 257 | public class LinkedTransferQueueTest ext
257		}
258
259		/**
260	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
260	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
261		*/
262		public void testTimedPoll() throws InterruptedException {
263		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
264		for (int i = 0; i < SIZE; ++i) {
265	<	long t0 = System.nanoTime();
265	>	long startTime = System.nanoTime();
266		assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
267	<	long millisElapsed = (System.nanoTime() - t0)/(1024 * 1024);
346	<	assertTrue(millisElapsed < SMALL_DELAY_MS);
267	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
268		}
269	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
269	>	long startTime = System.nanoTime();
270	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
271	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
272		checkEmpty(q);
273		}
274
#	Line 354 | Line 277 | public class LinkedTransferQueueTest ext
277		* returning timeout status
278		*/
279		public void testInterruptedTimedPoll() throws InterruptedException {
280	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
281	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
282	<	void realRun() throws InterruptedException {
280	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
281	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
282	>	Thread t = newStartedThread(new CheckedRunnable() {
283	>	public void realRun() throws InterruptedException {
284		for (int i = 0; i < SIZE; ++i) {
285		long t0 = System.nanoTime();
286	<	threadAssertEquals(i, (int) q.poll(LONG_DELAY_MS,
287	<	MILLISECONDS));
288	<	long millisElapsed = (System.nanoTime() - t0)/(1024 * 1024);
289	<	assertTrue(millisElapsed < SMALL_DELAY_MS);
286	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
287	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
288	>	}
289	>	long t0 = System.nanoTime();
290	>	aboutToWait.countDown();
291	>	try {
292	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
293	>	shouldThrow();
294	>	} catch (InterruptedException success) {
295	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
296		}
367	–	q.poll(LONG_DELAY_MS, MILLISECONDS);
297		}});
298	<	Thread.sleep(SMALL_DELAY_MS);
298	>
299	>	aboutToWait.await();
300	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
301		t.interrupt();
302	<	t.join();
302	>	awaitTermination(t, MEDIUM_DELAY_MS);
303		checkEmpty(q);
304		}
305
306		/**
307	<	* timed poll before a delayed offer fails; after offer succeeds;
308	<	* on interruption throws
307	>	* timed poll after thread interrupted throws InterruptedException
308	>	* instead of returning timeout status
309		*/
310	<	public void testTimedPollWithOffer() throws InterruptedException {
311	<	final LinkedTransferQueue q = new LinkedTransferQueue();
312	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
313	<	void realRun() throws InterruptedException {
314	<	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
315	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
316	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
310	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
311	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
312	>	Thread t = newStartedThread(new CheckedRunnable() {
313	>	public void realRun() throws InterruptedException {
314	>	Thread.currentThread().interrupt();
315	>	for (int i = 0; i < SIZE; ++i) {
316	>	long t0 = System.nanoTime();
317	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
318	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
319	>	}
320	>	try {
321	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
322	>	shouldThrow();
323	>	} catch (InterruptedException success) {}
324		}});
325	<	Thread.sleep(SMALL_DELAY_MS);
326	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
327	<	t.interrupt();
390	<	t.join();
325	>
326	>	awaitTermination(t, MEDIUM_DELAY_MS);
327	>	checkEmpty(q);
328		}
329
330		/**
#	Line 417 | Line 354 | public class LinkedTransferQueueTest ext
354		try {
355		q.element();
356		shouldThrow();
357	<	} catch (NoSuchElementException success) {
421	<	}
357	>	} catch (NoSuchElementException success) {}
358		checkEmpty(q);
359		}
360
#	Line 433 | Line 369 | public class LinkedTransferQueueTest ext
369		try {
370		q.remove();
371		shouldThrow();
372	<	} catch (NoSuchElementException success) {
437	<	}
372	>	} catch (NoSuchElementException success) {}
373		checkEmpty(q);
374		}
375
#	Line 443 | Line 378 | public class LinkedTransferQueueTest ext
378		*/
379		public void testRemoveElement() throws InterruptedException {
380		LinkedTransferQueue q = populatedQueue(SIZE);
381	<	for (int i = 1; i < SIZE; i += 2) {
381	>	for (int i = 1; i < SIZE; i+=2) {
382	>	assertTrue(q.contains(i));
383		assertTrue(q.remove(i));
384	+	assertFalse(q.contains(i));
385	+	assertTrue(q.contains(i-1));
386		}
387	<	for (int i = 0; i < SIZE; i += 2) {
387	>	for (int i = 0; i < SIZE; i+=2) {
388	>	assertTrue(q.contains(i));
389		assertTrue(q.remove(i));
390	<	assertFalse(q.remove(i + 1));
390	>	assertFalse(q.contains(i));
391	>	assertFalse(q.remove(i+1));
392	>	assertFalse(q.contains(i+1));
393		}
394		checkEmpty(q);
395		}
#	Line 463 | Line 404 | public class LinkedTransferQueueTest ext
404		assertTrue(q.remove(one));
405		assertTrue(q.remove(two));
406		assertTrue(q.add(three));
407	<	assertTrue(q.take() == three);
407	>	assertSame(q.take(), three);
408		}
409
410		/**
#	Line 545 | Line 486 | public class LinkedTransferQueueTest ext
486		}
487
488		/**
489	<	* toArray contains all elements
489	>	* toArray() contains all elements in FIFO order
490		*/
491	<	public void testToArray() throws InterruptedException {
491	>	public void testToArray() {
492		LinkedTransferQueue q = populatedQueue(SIZE);
493		Object[] o = q.toArray();
494		for (int i = 0; i < o.length; i++) {
495	<	assertEquals(o[i], q.take());
495	>	assertSame(o[i], q.poll());
496		}
497		}
498
499		/**
500	<	* toArray(a) contains all elements
500	>	* toArray(a) contains all elements in FIFO order
501		*/
502	<	public void testToArray2() throws InterruptedException {
502	>	public void testToArray2() {
503		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
504		Integer[] ints = new Integer[SIZE];
505	<	ints = q.toArray(ints);
505	>	Integer[] array = q.toArray(ints);
506	>	assertSame(ints, array);
507		for (int i = 0; i < ints.length; i++) {
508	<	assertEquals(ints[i], q.take());
508	>	assertSame(ints[i], q.poll());
509		}
510		}
511
512		/**
513	<	* toArray(null) throws NullPointerException
572	<	*/
573	<	public void testToArray_BadArg() {
574	<	try {
575	<	LinkedTransferQueue q = populatedQueue(SIZE);
576	<	Object o[] = q.toArray(null);
577	<	shouldThrow();
578	<	} catch (NullPointerException success) {
579	<	}
580	<	}
581	<
582	<	/**
583	<	* toArray with incompatible array type throws CCE
513	>	* toArray(incompatible array type) throws ArrayStoreException
514		*/
515		public void testToArray1_BadArg() {
516	+	LinkedTransferQueue q = populatedQueue(SIZE);
517		try {
518	<	LinkedTransferQueue q = populatedQueue(SIZE);
588	<	Object o[] = q.toArray(new String[10]);
518	>	q.toArray(new String[10]);
519		shouldThrow();
520	<	} catch (ArrayStoreException success) {
591	<	}
520	>	} catch (ArrayStoreException success) {}
521		}
522
523		/**
#	Line 618 | Line 547 | public class LinkedTransferQueueTest ext
547		it.remove();
548
549		it = q.iterator();
550	<	assertEquals(it.next(), one);
551	<	assertEquals(it.next(), three);
550	>	assertSame(it.next(), one);
551	>	assertSame(it.next(), three);
552		assertFalse(it.hasNext());
553		}
554
#	Line 663 | Line 592 | public class LinkedTransferQueueTest ext
592		LinkedTransferQueue q = populatedQueue(SIZE);
593		String s = q.toString();
594		for (int i = 0; i < SIZE; ++i) {
595	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
595	>	assertTrue(s.contains(String.valueOf(i)));
596		}
597		}
598
#	Line 672 | Line 601 | public class LinkedTransferQueueTest ext
601		*/
602		public void testOfferInExecutor() {
603		final LinkedTransferQueue q = new LinkedTransferQueue();
604	<	q.add(one);
676	<	q.add(two);
604	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
605		ExecutorService executor = Executors.newFixedThreadPool(2);
606
607		executor.execute(new CheckedRunnable() {
608	<	void realRun() {
609	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS,
610	<	MILLISECONDS));
608	>	public void realRun() throws InterruptedException {
609	>	threadsStarted.await();
610	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
611		}});
612
613		executor.execute(new CheckedRunnable() {
614	<	void realRun() throws InterruptedException {
615	<	Thread.sleep(SMALL_DELAY_MS);
616	<	threadAssertEquals(one, q.take());
614	>	public void realRun() throws InterruptedException {
615	>	threadsStarted.await();
616	>	assertSame(one, q.take());
617	>	checkEmpty(q);
618		}});
619
620		joinPool(executor);
621		}
622
623		/**
624	<	* poll retrieves elements across Executor threads
624	>	* timed poll retrieves elements across Executor threads
625		*/
626		public void testPollInExecutor() {
627		final LinkedTransferQueue q = new LinkedTransferQueue();
628	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
629		ExecutorService executor = Executors.newFixedThreadPool(2);
630
631		executor.execute(new CheckedRunnable() {
632	<	void realRun() throws InterruptedException {
633	<	threadAssertNull(q.poll());
634	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS,
635	<	MILLISECONDS));
636	<	threadAssertTrue(q.isEmpty());
632	>	public void realRun() throws InterruptedException {
633	>	assertNull(q.poll());
634	>	threadsStarted.await();
635	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
636	>	checkEmpty(q);
637		}});
638
639		executor.execute(new CheckedRunnable() {
640	<	void realRun() throws InterruptedException {
641	<	Thread.sleep(SMALL_DELAY_MS);
640	>	public void realRun() throws InterruptedException {
641	>	threadsStarted.await();
642		q.put(one);
643		}});
644
#	Line 734 | Line 664 | public class LinkedTransferQueueTest ext
664		LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
665
666		assertEquals(q.size(), r.size());
667	+	assertEquals(q.toString(), r.toString());
668	+	assertTrue(Arrays.equals(q.toArray(), r.toArray()));
669		while (!q.isEmpty()) {
670		assertEquals(q.remove(), r.remove());
671		}
672		}
673
674		/**
743	–	* drainTo(null) throws NullPointerException
744	–	*/
745	–	public void testDrainToNull() {
746	–	LinkedTransferQueue q = populatedQueue(SIZE);
747	–	try {
748	–	q.drainTo(null);
749	–	shouldThrow();
750	–	} catch (NullPointerException success) {
751	–	}
752	–	}
753	–
754	–	/**
755	–	* drainTo(this) throws IllegalArgumentException
756	–	*/
757	–	public void testDrainToSelf() {
758	–	LinkedTransferQueue q = populatedQueue(SIZE);
759	–	try {
760	–	q.drainTo(q);
761	–	shouldThrow();
762	–	} catch (IllegalArgumentException success) {
763	–	}
764	–	}
765	–
766	–	/**
675		* drainTo(c) empties queue into another collection c
676		*/
677		public void testDrainTo() {
#	Line 790 | Line 698 | public class LinkedTransferQueueTest ext
698		}
699
700		/**
701	<	* drainTo empties full queue, unblocking a waiting put.
701	>	* drainTo(c) empties full queue, unblocking a waiting put.
702		*/
703		public void testDrainToWithActivePut() throws InterruptedException {
704		final LinkedTransferQueue q = populatedQueue(SIZE);
705		Thread t = newStartedThread(new CheckedRunnable() {
706	<	void realRun() {
706	>	public void realRun() {
707		q.put(SIZE + 1);
708		}});
709		ArrayList l = new ArrayList();
#	Line 804 | Line 712 | public class LinkedTransferQueueTest ext
712		for (int i = 0; i < SIZE; ++i) {
713		assertEquals(l.get(i), i);
714		}
715	<	t.join();
715	>	awaitTermination(t, MEDIUM_DELAY_MS);
716		assertTrue(q.size() + l.size() >= SIZE);
717		}
718
719		/**
720	<	* drainTo(null, n) throws NullPointerException
813	<	*/
814	<	public void testDrainToNullN() {
815	<	LinkedTransferQueue q = populatedQueue(SIZE);
816	<	try {
817	<	q.drainTo(null, SIZE);
818	<	shouldThrow();
819	<	} catch (NullPointerException success) {
820	<	}
821	<	}
822	<
823	<	/**
824	<	* drainTo(this, n) throws IllegalArgumentException
825	<	*/
826	<	public void testDrainToSelfN() {
827	<	LinkedTransferQueue q = populatedQueue(SIZE);
828	<	try {
829	<	q.drainTo(q, SIZE);
830	<	shouldThrow();
831	<	} catch (IllegalArgumentException success) {
832	<	}
833	<	}
834	<
835	<	/**
836	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
720	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
721		*/
722		public void testDrainToN() {
723		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 855 | Line 739 | public class LinkedTransferQueueTest ext
739		}
740
741		/**
742	<	* poll and take decrement the waiting consumer count
742	>	* timed poll() or take() increments the waiting consumer count;
743	>	* offer(e) decrements the waiting consumer count
744		*/
745		public void testWaitingConsumer() throws InterruptedException {
746		final LinkedTransferQueue q = new LinkedTransferQueue();
747	<	final ConsumerObserver waiting = new ConsumerObserver();
747	>	assertEquals(q.getWaitingConsumerCount(), 0);
748	>	assertFalse(q.hasWaitingConsumer());
749	>	final CountDownLatch threadStarted = new CountDownLatch(1);
750
751		Thread t = newStartedThread(new CheckedRunnable() {
752	<	void realRun() throws InterruptedException {
753	<	Thread.sleep(SMALL_DELAY_MS);
754	<	threadAssertTrue(q.hasWaitingConsumer());
755	<	waiting.setWaitingConsumer(q.getWaitingConsumerCount());
756	<	threadAssertTrue(q.offer(new Object()));
752	>	public void realRun() throws InterruptedException {
753	>	threadStarted.countDown();
754	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
755	>	assertEquals(q.getWaitingConsumerCount(), 0);
756	>	assertFalse(q.hasWaitingConsumer());
757		}});
758
759	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) != null);
760	<	assertTrue(q.getWaitingConsumerCount()
761	<	< waiting.getWaitingConsumers());
762	<	t.join();
759	>	threadStarted.await();
760	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
761	>	assertEquals(q.getWaitingConsumerCount(), 1);
762	>	assertTrue(q.hasWaitingConsumer());
763	>
764	>	assertTrue(q.offer(one));
765	>	assertEquals(q.getWaitingConsumerCount(), 0);
766	>	assertFalse(q.hasWaitingConsumer());
767	>
768	>	awaitTermination(t, MEDIUM_DELAY_MS);
769		}
770
771		/**
#	Line 883 | Line 776 | public class LinkedTransferQueueTest ext
776		LinkedTransferQueue q = new LinkedTransferQueue();
777		q.transfer(null);
778		shouldThrow();
779	<	} catch (NullPointerException ex) {
887	<	}
779	>	} catch (NullPointerException success) {}
780		}
781
782		/**
#	Line 894 | Line 786 | public class LinkedTransferQueueTest ext
786		public void testTransfer2() throws InterruptedException {
787		final LinkedTransferQueue<Integer> q
788		= new LinkedTransferQueue<Integer>();
789	+	final CountDownLatch threadStarted = new CountDownLatch(1);
790
791		Thread t = newStartedThread(new CheckedRunnable() {
792	<	void realRun() throws InterruptedException {
793	<	q.transfer(SIZE);
794	<	threadAssertTrue(q.isEmpty());
792	>	public void realRun() throws InterruptedException {
793	>	threadStarted.countDown();
794	>	q.transfer(five);
795	>	checkEmpty(q);
796		}});
797
798	<	Thread.sleep(SHORT_DELAY_MS);
798	>	threadStarted.await();
799	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
800		assertEquals(1, q.size());
801	<	assertEquals(SIZE, (int) q.poll());
802	<	assertTrue(q.isEmpty());
803	<	t.join();
801	>	assertSame(five, q.poll());
802	>	checkEmpty(q);
803	>	awaitTermination(t, MEDIUM_DELAY_MS);
804		}
805
806		/**
#	Line 916 | Line 811 | public class LinkedTransferQueueTest ext
811		= new LinkedTransferQueue<Integer>();
812
813		Thread first = newStartedThread(new CheckedRunnable() {
814	<	void realRun() throws InterruptedException {
815	<	Integer i = SIZE + 1;
816	<	q.transfer(i);
817	<	threadAssertTrue(!q.contains(i));
923	<	threadAssertEquals(1, q.size());
814	>	public void realRun() throws InterruptedException {
815	>	q.transfer(four);
816	>	assertTrue(!q.contains(four));
817	>	assertEquals(1, q.size());
818		}});
819
820		Thread interruptedThread = newStartedThread(
821		new CheckedInterruptedRunnable() {
822	<	void realRun() throws InterruptedException {
823	<	while (q.size() == 0)
822	>	public void realRun() throws InterruptedException {
823	>	while (q.isEmpty())
824		Thread.yield();
825	<	q.transfer(SIZE);
825	>	q.transfer(five);
826		}});
827
828		while (q.size() < 2)
829		Thread.yield();
830		assertEquals(2, q.size());
831	<	assertEquals(SIZE + 1, (int) q.poll());
831	>	assertSame(four, q.poll());
832		first.join();
833		assertEquals(1, q.size());
834		interruptedThread.interrupt();
835		interruptedThread.join();
836	<	assertEquals(0, q.size());
943	<	assertTrue(q.isEmpty());
836	>	checkEmpty(q);
837		}
838
839		/**
#	Line 951 | Line 844 | public class LinkedTransferQueueTest ext
844		final LinkedTransferQueue q = new LinkedTransferQueue();
845
846		Thread t = newStartedThread(new CheckedRunnable() {
847	<	void realRun() throws InterruptedException {
847	>	public void realRun() throws InterruptedException {
848		q.transfer(four);
849	<	threadAssertFalse(q.contains(four));
850	<	threadAssertEquals(three, q.poll());
849	>	assertFalse(q.contains(four));
850	>	assertSame(three, q.poll());
851		}});
852
853	<	Thread.sleep(SHORT_DELAY_MS);
853	>	while (q.isEmpty())
854	>	Thread.yield();
855	>	assertFalse(q.isEmpty());
856	>	assertEquals(1, q.size());
857		assertTrue(q.offer(three));
858	<	assertEquals(four, q.poll());
859	<	t.join();
858	>	assertSame(four, q.poll());
859	>	awaitTermination(t, MEDIUM_DELAY_MS);
860		}
861
862		/**
#	Line 972 | Line 868 | public class LinkedTransferQueueTest ext
868		= new LinkedTransferQueue<Integer>();
869
870		Thread t = newStartedThread(new CheckedRunnable() {
871	<	void realRun() throws InterruptedException {
872	<	q.transfer(SIZE);
871	>	public void realRun() throws InterruptedException {
872	>	q.transfer(four);
873		checkEmpty(q);
874		}});
875
876	<	Thread.sleep(SHORT_DELAY_MS);
877	<	assertEquals(SIZE, (int) q.take());
876	>	while (q.isEmpty())
877	>	Thread.yield();
878	>	assertFalse(q.isEmpty());
879	>	assertEquals(1, q.size());
880	>	assertSame(four, q.take());
881		checkEmpty(q);
882	<	t.join();
882	>	awaitTermination(t, MEDIUM_DELAY_MS);
883		}
884
885		/**
#	Line 991 | Line 890 | public class LinkedTransferQueueTest ext
890		final LinkedTransferQueue q = new LinkedTransferQueue();
891		q.tryTransfer(null);
892		shouldThrow();
893	<	} catch (NullPointerException ex) {
995	<	}
893	>	} catch (NullPointerException success) {}
894		}
895
896		/**
#	Line 1015 | Line 913 | public class LinkedTransferQueueTest ext
913		final LinkedTransferQueue q = new LinkedTransferQueue();
914
915		Thread t = newStartedThread(new CheckedRunnable() {
916	<	void realRun() {
916	>	public void realRun() {
917		while (! q.hasWaitingConsumer())
918		Thread.yield();
919	<	threadAssertTrue(q.hasWaitingConsumer());
920	<	threadAssertTrue(q.isEmpty());
921	<	threadAssertTrue(q.size() == 0);
1024	<	threadAssertTrue(q.tryTransfer(hotPotato));
919	>	assertTrue(q.hasWaitingConsumer());
920	>	checkEmpty(q);
921	>	assertTrue(q.tryTransfer(hotPotato));
922		}});
923
924	<	assertTrue(q.poll(MEDIUM_DELAY_MS, MILLISECONDS) == hotPotato);
924	>	assertSame(hotPotato, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
925		checkEmpty(q);
926	<	t.join();
926	>	awaitTermination(t, MEDIUM_DELAY_MS);
927		}
928
929		/**
#	Line 1038 | Line 935 | public class LinkedTransferQueueTest ext
935		final LinkedTransferQueue q = new LinkedTransferQueue();
936
937		Thread t = newStartedThread(new CheckedRunnable() {
938	<	void realRun() {
938	>	public void realRun() {
939		while (! q.hasWaitingConsumer())
940		Thread.yield();
941	<	threadAssertTrue(q.hasWaitingConsumer());
942	<	threadAssertTrue(q.isEmpty());
943	<	threadAssertTrue(q.size() == 0);
1047	<	threadAssertTrue(q.tryTransfer(hotPotato));
941	>	assertTrue(q.hasWaitingConsumer());
942	>	checkEmpty(q);
943	>	assertTrue(q.tryTransfer(hotPotato));
944		}});
945
946	<	assertTrue(q.take() == hotPotato);
946	>	assertSame(q.take(), hotPotato);
947		checkEmpty(q);
948	<	t.join();
948	>	awaitTermination(t, MEDIUM_DELAY_MS);
949		}
950
951		/**
952	<	* tryTransfer waits the amount given if interrupted, and
1057	<	* throws interrupted exception
952	>	* tryTransfer blocks interruptibly if no takers
953		*/
954		public void testTryTransfer5() throws InterruptedException {
955		final LinkedTransferQueue q = new LinkedTransferQueue();
956	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
957	+	assertTrue(q.isEmpty());
958
959	<	Thread toInterrupt = newStartedThread(new CheckedInterruptedRunnable() {
960	<	void realRun() throws InterruptedException {
961	<	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
959	>	Thread t = newStartedThread(new CheckedRunnable() {
960	>	public void realRun() throws InterruptedException {
961	>	Thread.currentThread().interrupt();
962	>	try {
963	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
964	>	shouldThrow();
965	>	} catch (InterruptedException success) {}
966	>	assertFalse(Thread.interrupted());
967	>
968	>	pleaseInterrupt.countDown();
969	>	try {
970	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
971	>	shouldThrow();
972	>	} catch (InterruptedException success) {}
973	>	assertFalse(Thread.interrupted());
974		}});
975
976	<	Thread.sleep(SMALL_DELAY_MS);
977	<	toInterrupt.interrupt();
978	<	toInterrupt.join();
976	>	await(pleaseInterrupt);
977	>	assertThreadStaysAlive(t);
978	>	t.interrupt();
979	>	awaitTermination(t);
980	>	checkEmpty(q);
981		}
982
983		/**
984	<	* tryTransfer gives up after the timeout and return false
984	>	* tryTransfer gives up after the timeout and returns false
985		*/
986		public void testTryTransfer6() throws InterruptedException {
987		final LinkedTransferQueue q = new LinkedTransferQueue();
988
989		Thread t = newStartedThread(new CheckedRunnable() {
990	<	void realRun() throws InterruptedException {
991	<	threadAssertFalse
992	<	(q.tryTransfer(new Object(),
993	<	SHORT_DELAY_MS, MILLISECONDS));
990	>	public void realRun() throws InterruptedException {
991	>	long t0 = System.nanoTime();
992	>	assertFalse(q.tryTransfer(new Object(),
993	>	timeoutMillis(), MILLISECONDS));
994	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
995	>	checkEmpty(q);
996		}});
997
998	<	Thread.sleep(SMALL_DELAY_MS);
998	>	awaitTermination(t);
999		checkEmpty(q);
1087	–	t.join();
1000		}
1001
1002		/**
#	Line 1096 | Line 1008 | public class LinkedTransferQueueTest ext
1008		assertTrue(q.offer(four));
1009
1010		Thread t = newStartedThread(new CheckedRunnable() {
1011	<	void realRun() throws InterruptedException {
1012	<	threadAssertTrue(q.tryTransfer(five,
1013	<	MEDIUM_DELAY_MS, MILLISECONDS));
1102	<	threadAssertTrue(q.isEmpty());
1011	>	public void realRun() throws InterruptedException {
1012	>	assertTrue(q.tryTransfer(five, MEDIUM_DELAY_MS, MILLISECONDS));
1013	>	checkEmpty(q);
1014		}});
1015
1016	<	Thread.sleep(SHORT_DELAY_MS);
1016	>	while (q.size() != 2)
1017	>	Thread.yield();
1018		assertEquals(2, q.size());
1019	<	assertEquals(four, q.poll());
1020	<	assertEquals(five, q.poll());
1019	>	assertSame(four, q.poll());
1020	>	assertSame(five, q.poll());
1021		checkEmpty(q);
1022	<	t.join();
1022	>	awaitTermination(t, MEDIUM_DELAY_MS);
1023		}
1024
1025		/**
1026	<	* tryTransfer attempts to enqueue into the q and fails returning
1027	<	* false not enqueueing and the successive poll is null
1026	>	* tryTransfer attempts to enqueue into the queue and fails
1027	>	* returning false not enqueueing and the successive poll is null
1028		*/
1029		public void testTryTransfer8() throws InterruptedException {
1030		final LinkedTransferQueue q = new LinkedTransferQueue();
1031		assertTrue(q.offer(four));
1032		assertEquals(1, q.size());
1033	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
1033	>	long t0 = System.nanoTime();
1034	>	assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
1035	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
1036		assertEquals(1, q.size());
1037	<	assertEquals(four, q.poll());
1124	<	checkEmpty(q);
1037	>	assertSame(four, q.poll());
1038		assertNull(q.poll());
1039	+	checkEmpty(q);
1040		}
1041
1042		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1043		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1044	<	assertTrue(q.isEmpty());
1044	>	checkEmpty(q);
1045		for (int i = 0; i < n; i++) {
1046		assertEquals(i, q.size());
1047		assertTrue(q.offer(i));
#	Line 1136 | Line 1050 | public class LinkedTransferQueueTest ext
1050		assertFalse(q.isEmpty());
1051		return q;
1052		}
1139	–
1140	–	private static class ConsumerObserver {
1141	–
1142	–	private int waitingConsumers;
1143	–
1144	–	private ConsumerObserver() {
1145	–	}
1146	–
1147	–	private void setWaitingConsumer(int i) {
1148	–	this.waitingConsumers = i;
1149	–	}
1150	–
1151	–	private int getWaitingConsumers() {
1152	–	return waitingConsumers;
1153	–	}
1154	–	}
1053		}

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