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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 1.51 by jsr166, Sat Nov 26 05:42:14 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
8	<	import java.io.BufferedInputStream;
9	<	import java.io.BufferedOutputStream;
10	<	import java.io.ByteArrayInputStream;
11	<	import java.io.ByteArrayOutputStream;
12	<	import java.io.ObjectInputStream;
13	<	import java.io.ObjectOutputStream;
14	<	import java.util.ArrayList;
8	>	import junit.framework.*;
9		import java.util.Arrays;
10	<	import java.util.ConcurrentModificationException;
10	>	import java.util.ArrayList;
11	>	import java.util.Collection;
12		import java.util.Iterator;
13		import java.util.List;
14		import java.util.NoSuchElementException;
15	<	import java.util.concurrent.*;
15	>	import java.util.Queue;
16	>	import java.util.concurrent.BlockingQueue;
17	>	import java.util.concurrent.CountDownLatch;
18	>	import java.util.concurrent.Executors;
19	>	import java.util.concurrent.ExecutorService;
20	>	import java.util.concurrent.LinkedTransferQueue;
21		import static java.util.concurrent.TimeUnit.MILLISECONDS;
22	<	import junit.framework.Test;
23	<	import junit.framework.TestSuite;
22	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
23
24		@SuppressWarnings({"unchecked", "rawtypes"})
25		public class LinkedTransferQueueTest extends JSR166TestCase {
26
27	+	public static class Generic extends BlockingQueueTest {
28	+	protected BlockingQueue emptyCollection() {
29	+	return new LinkedTransferQueue();
30	+	}
31	+	}
32	+
33		public static void main(String[] args) {
34		junit.textui.TestRunner.run(suite());
35		}
36
37		public static Test suite() {
38	<	return new TestSuite(LinkedTransferQueueTest.class);
39	<	}
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	<	}
38	>	return newTestSuite(LinkedTransferQueueTest.class,
39	>	new Generic().testSuite());
40		}
41
42		/**
#	Line 76 | Line 56 | public class LinkedTransferQueueTest ext
56		try {
57		new LinkedTransferQueue(null);
58		shouldThrow();
59	<	} catch (NullPointerException success) {
80	<	}
59	>	} catch (NullPointerException success) {}
60		}
61
62		/**
#	Line 85 | Line 64 | public class LinkedTransferQueueTest ext
64		* NullPointerException
65		*/
66		public void testConstructor3() {
67	+	Collection<Integer> elements = Arrays.asList(new Integer[SIZE]);
68		try {
69	<	Integer[] ints = new Integer[SIZE];
90	<	new LinkedTransferQueue(Arrays.asList(ints));
69	>	new LinkedTransferQueue(elements);
70		shouldThrow();
71	<	} catch (NullPointerException success) {
93	<	}
71	>	} catch (NullPointerException success) {}
72		}
73
74		/**
#	Line 98 | Line 76 | public class LinkedTransferQueueTest ext
76		* throws NullPointerException
77		*/
78		public void testConstructor4() {
79	+	Integer[] ints = new Integer[SIZE];
80	+	for (int i = 0; i < SIZE-1; ++i)
81	+	ints[i] = i;
82	+	Collection<Integer> elements = Arrays.asList(ints);
83		try {
84	<	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));
84	>	new LinkedTransferQueue(elements);
85		shouldThrow();
86	<	} catch (NullPointerException success) {
109	<	}
86	>	} catch (NullPointerException success) {}
87		}
88
89		/**
#	Line 151 | Line 128 | public class LinkedTransferQueueTest ext
128		}
129
130		/**
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	–	/**
131		* addAll(this) throws IllegalArgumentException
132		*/
133		public void testAddAllSelf() {
#	Line 194 | Line 135 | public class LinkedTransferQueueTest ext
135		LinkedTransferQueue q = populatedQueue(SIZE);
136		q.addAll(q);
137		shouldThrow();
138	<	} 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	<	}
138	>	} catch (IllegalArgumentException success) {}
139		}
140
141		/**
#	Line 224 | Line 151 | public class LinkedTransferQueueTest ext
151		}
152		q.addAll(Arrays.asList(ints));
153		shouldThrow();
154	<	} catch (NullPointerException success) {
228	<	}
154	>	} catch (NullPointerException success) {}
155		}
156
157		/**
#	Line 246 | Line 172 | public class LinkedTransferQueueTest ext
172		}
173
174		/**
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	–	/**
175		* all elements successfully put are contained
176		*/
177		public void testPut() {
178		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
179		for (int i = 0; i < SIZE; ++i) {
180	<	assertEquals(q.size(), i);
180	>	assertEquals(i, q.size());
181		q.put(i);
182		assertTrue(q.contains(i));
183		}
#	Line 279 | Line 194 | public class LinkedTransferQueueTest ext
194		}
195
196		/**
197	<	* 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
197	>	* take removes existing elements until empty, then blocks interruptibly
198		*/
199		public void testBlockingTake() throws InterruptedException {
200	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
201	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
202	<	void realRun() throws InterruptedException {
200	>	final BlockingQueue q = populatedQueue(SIZE);
201	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
202	>	Thread t = newStartedThread(new CheckedRunnable() {
203	>	public void realRun() throws InterruptedException {
204		for (int i = 0; i < SIZE; ++i) {
205	<	threadAssertEquals(i, (int) q.take());
205	>	assertEquals(i, q.take());
206		}
207	<	q.take();
207	>
208	>	Thread.currentThread().interrupt();
209	>	try {
210	>	q.take();
211	>	shouldThrow();
212	>	} catch (InterruptedException success) {}
213	>	assertFalse(Thread.interrupted());
214	>
215	>	pleaseInterrupt.countDown();
216	>	try {
217	>	q.take();
218	>	shouldThrow();
219	>	} catch (InterruptedException success) {}
220	>	assertFalse(Thread.interrupted());
221		}});
222	<	Thread.sleep(SMALL_DELAY_MS);
222	>
223	>	await(pleaseInterrupt);
224	>	assertThreadStaysAlive(t);
225		t.interrupt();
226	<	t.join();
310	<	checkEmpty(q);
226	>	awaitTermination(t);
227		}
228
229		/**
#	Line 323 | Line 239 | public class LinkedTransferQueueTest ext
239		}
240
241		/**
242	<	* timed pool with zero timeout succeeds when non-empty, else times out
242	>	* timed poll with zero timeout succeeds when non-empty, else times out
243		*/
244		public void testTimedPoll0() throws InterruptedException {
245		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
#	Line 335 | Line 251 | public class LinkedTransferQueueTest ext
251		}
252
253		/**
254	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
254	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
255		*/
256		public void testTimedPoll() throws InterruptedException {
257		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
258		for (int i = 0; i < SIZE; ++i) {
259	<	long t0 = System.nanoTime();
259	>	long startTime = System.nanoTime();
260		assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
261	<	long millisElapsed = (System.nanoTime() - t0)/(1024 * 1024);
346	<	assertTrue(millisElapsed < SMALL_DELAY_MS);
261	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
262		}
263	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
263	>	long startTime = System.nanoTime();
264	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
265	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
266		checkEmpty(q);
267		}
268
#	Line 354 | Line 271 | public class LinkedTransferQueueTest ext
271		* returning timeout status
272		*/
273		public void testInterruptedTimedPoll() throws InterruptedException {
274	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
275	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
276	<	void realRun() throws InterruptedException {
274	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
275	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
276	>	Thread t = newStartedThread(new CheckedRunnable() {
277	>	public void realRun() throws InterruptedException {
278		for (int i = 0; i < SIZE; ++i) {
279		long t0 = System.nanoTime();
280	<	threadAssertEquals(i, (int) q.poll(LONG_DELAY_MS,
281	<	MILLISECONDS));
282	<	long millisElapsed = (System.nanoTime() - t0)/(1024 * 1024);
283	<	assertTrue(millisElapsed < SMALL_DELAY_MS);
280	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
281	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
282	>	}
283	>	long t0 = System.nanoTime();
284	>	aboutToWait.countDown();
285	>	try {
286	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
287	>	shouldThrow();
288	>	} catch (InterruptedException success) {
289	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
290		}
367	–	q.poll(LONG_DELAY_MS, MILLISECONDS);
291		}});
292	<	Thread.sleep(SMALL_DELAY_MS);
292	>
293	>	aboutToWait.await();
294	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
295		t.interrupt();
296	<	t.join();
296	>	awaitTermination(t, MEDIUM_DELAY_MS);
297		checkEmpty(q);
298		}
299
300		/**
301	<	* timed poll before a delayed offer fails; after offer succeeds;
302	<	* on interruption throws
301	>	* timed poll after thread interrupted throws InterruptedException
302	>	* instead of returning timeout status
303		*/
304	<	public void testTimedPollWithOffer() throws InterruptedException {
305	<	final LinkedTransferQueue q = new LinkedTransferQueue();
306	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
307	<	void realRun() throws InterruptedException {
308	<	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
309	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
310	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
304	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
305	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
306	>	Thread t = newStartedThread(new CheckedRunnable() {
307	>	public void realRun() throws InterruptedException {
308	>	Thread.currentThread().interrupt();
309	>	for (int i = 0; i < SIZE; ++i) {
310	>	long t0 = System.nanoTime();
311	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
312	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
313	>	}
314	>	try {
315	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
316	>	shouldThrow();
317	>	} catch (InterruptedException success) {}
318		}});
319	<	Thread.sleep(SMALL_DELAY_MS);
320	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
321	<	t.interrupt();
390	<	t.join();
319	>
320	>	awaitTermination(t, MEDIUM_DELAY_MS);
321	>	checkEmpty(q);
322		}
323
324		/**
#	Line 417 | Line 348 | public class LinkedTransferQueueTest ext
348		try {
349		q.element();
350		shouldThrow();
351	<	} catch (NoSuchElementException success) {
421	<	}
351	>	} catch (NoSuchElementException success) {}
352		checkEmpty(q);
353		}
354
#	Line 433 | Line 363 | public class LinkedTransferQueueTest ext
363		try {
364		q.remove();
365		shouldThrow();
366	<	} catch (NoSuchElementException success) {
437	<	}
438	<	checkEmpty(q);
439	<	}
440	<
441	<	/**
442	<	* remove(x) removes x and returns true if present
443	<	*/
444	<	public void testRemoveElement() throws InterruptedException {
445	<	LinkedTransferQueue q = populatedQueue(SIZE);
446	<	for (int i = 1; i < SIZE; i += 2) {
447	<	assertTrue(q.remove(i));
448	<	}
449	<	for (int i = 0; i < SIZE; i += 2) {
450	<	assertTrue(q.remove(i));
451	<	assertFalse(q.remove(i + 1));
452	<	}
366	>	} catch (NoSuchElementException success) {}
367		checkEmpty(q);
368		}
369
#	Line 463 | Line 377 | public class LinkedTransferQueueTest ext
377		assertTrue(q.remove(one));
378		assertTrue(q.remove(two));
379		assertTrue(q.add(three));
380	<	assertTrue(q.take() == three);
380	>	assertSame(q.take(), three);
381		}
382
383		/**
#	Line 545 | Line 459 | public class LinkedTransferQueueTest ext
459		}
460
461		/**
462	<	* toArray contains all elements
462	>	* toArray() contains all elements in FIFO order
463		*/
464	<	public void testToArray() throws InterruptedException {
464	>	public void testToArray() {
465		LinkedTransferQueue q = populatedQueue(SIZE);
466		Object[] o = q.toArray();
467		for (int i = 0; i < o.length; i++) {
468	<	assertEquals(o[i], q.take());
468	>	assertSame(o[i], q.poll());
469		}
470		}
471
472		/**
473	<	* toArray(a) contains all elements
473	>	* toArray(a) contains all elements in FIFO order
474		*/
475	<	public void testToArray2() throws InterruptedException {
475	>	public void testToArray2() {
476		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
477		Integer[] ints = new Integer[SIZE];
478	<	ints = q.toArray(ints);
478	>	Integer[] array = q.toArray(ints);
479	>	assertSame(ints, array);
480		for (int i = 0; i < ints.length; i++) {
481	<	assertEquals(ints[i], q.take());
481	>	assertSame(ints[i], q.poll());
482		}
483		}
484
485		/**
486	<	* 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
486	>	* toArray(incompatible array type) throws ArrayStoreException
487		*/
488		public void testToArray1_BadArg() {
489	+	LinkedTransferQueue q = populatedQueue(SIZE);
490		try {
491	<	LinkedTransferQueue q = populatedQueue(SIZE);
588	<	Object o[] = q.toArray(new String[10]);
491	>	q.toArray(new String[10]);
492		shouldThrow();
493	<	} catch (ArrayStoreException success) {
591	<	}
493	>	} catch (ArrayStoreException success) {}
494		}
495
496		/**
#	Line 618 | Line 520 | public class LinkedTransferQueueTest ext
520		it.remove();
521
522		it = q.iterator();
523	<	assertEquals(it.next(), one);
524	<	assertEquals(it.next(), three);
523	>	assertSame(it.next(), one);
524	>	assertSame(it.next(), three);
525		assertFalse(it.hasNext());
526		}
527
#	Line 663 | Line 565 | public class LinkedTransferQueueTest ext
565		LinkedTransferQueue q = populatedQueue(SIZE);
566		String s = q.toString();
567		for (int i = 0; i < SIZE; ++i) {
568	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
568	>	assertTrue(s.contains(String.valueOf(i)));
569		}
570		}
571
#	Line 672 | Line 574 | public class LinkedTransferQueueTest ext
574		*/
575		public void testOfferInExecutor() {
576		final LinkedTransferQueue q = new LinkedTransferQueue();
577	<	q.add(one);
676	<	q.add(two);
577	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
578		ExecutorService executor = Executors.newFixedThreadPool(2);
579
580		executor.execute(new CheckedRunnable() {
581	<	void realRun() {
582	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS,
583	<	MILLISECONDS));
581	>	public void realRun() throws InterruptedException {
582	>	threadsStarted.await();
583	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
584		}});
585
586		executor.execute(new CheckedRunnable() {
587	<	void realRun() throws InterruptedException {
588	<	Thread.sleep(SMALL_DELAY_MS);
589	<	threadAssertEquals(one, q.take());
587	>	public void realRun() throws InterruptedException {
588	>	threadsStarted.await();
589	>	assertSame(one, q.take());
590	>	checkEmpty(q);
591		}});
592
593		joinPool(executor);
594		}
595
596		/**
597	<	* poll retrieves elements across Executor threads
597	>	* timed poll retrieves elements across Executor threads
598		*/
599		public void testPollInExecutor() {
600		final LinkedTransferQueue q = new LinkedTransferQueue();
601	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
602		ExecutorService executor = Executors.newFixedThreadPool(2);
603
604		executor.execute(new CheckedRunnable() {
605	<	void realRun() throws InterruptedException {
606	<	threadAssertNull(q.poll());
607	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS,
608	<	MILLISECONDS));
609	<	threadAssertTrue(q.isEmpty());
605	>	public void realRun() throws InterruptedException {
606	>	assertNull(q.poll());
607	>	threadsStarted.await();
608	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
609	>	checkEmpty(q);
610		}});
611
612		executor.execute(new CheckedRunnable() {
613	<	void realRun() throws InterruptedException {
614	<	Thread.sleep(SMALL_DELAY_MS);
613	>	public void realRun() throws InterruptedException {
614	>	threadsStarted.await();
615		q.put(one);
616		}});
617
#	Line 719 | Line 622 | public class LinkedTransferQueueTest ext
622		* A deserialized serialized queue has same elements in same order
623		*/
624		public void testSerialization() throws Exception {
625	<	LinkedTransferQueue q = populatedQueue(SIZE);
626	<
724	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
725	<	ObjectOutputStream out
726	<	= new ObjectOutputStream(new BufferedOutputStream(bout));
727	<	out.writeObject(q);
728	<	out.close();
625	>	Queue x = populatedQueue(SIZE);
626	>	Queue y = serialClone(x);
627
628	<	ByteArrayInputStream bin
629	<	= new ByteArrayInputStream(bout.toByteArray());
630	<	ObjectInputStream in
631	<	= new ObjectInputStream(new BufferedInputStream(bin));
632	<	LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
633	<
634	<	assertEquals(q.size(), r.size());
737	<	while (!q.isEmpty()) {
738	<	assertEquals(q.remove(), r.remove());
739	<	}
740	<	}
741	<
742	<	/**
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) {
628	>	assertTrue(x != y);
629	>	assertEquals(x.size(), y.size());
630	>	assertEquals(x.toString(), y.toString());
631	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
632	>	while (!x.isEmpty()) {
633	>	assertFalse(y.isEmpty());
634	>	assertEquals(x.remove(), y.remove());
635		}
636	+	assertTrue(y.isEmpty());
637		}
638
639		/**
#	Line 770 | Line 643 | public class LinkedTransferQueueTest ext
643		LinkedTransferQueue q = populatedQueue(SIZE);
644		ArrayList l = new ArrayList();
645		q.drainTo(l);
646	<	assertEquals(q.size(), 0);
647	<	assertEquals(l.size(), SIZE);
646	>	assertEquals(0, q.size());
647	>	assertEquals(SIZE, l.size());
648		for (int i = 0; i < SIZE; ++i) {
649	<	assertEquals(l.get(i), i);
649	>	assertEquals(i, l.get(i));
650		}
651		q.add(zero);
652		q.add(one);
#	Line 782 | Line 655 | public class LinkedTransferQueueTest ext
655		assertTrue(q.contains(one));
656		l.clear();
657		q.drainTo(l);
658	<	assertEquals(q.size(), 0);
659	<	assertEquals(l.size(), 2);
658	>	assertEquals(0, q.size());
659	>	assertEquals(2, l.size());
660		for (int i = 0; i < 2; ++i) {
661	<	assertEquals(l.get(i), i);
661	>	assertEquals(i, l.get(i));
662		}
663		}
664
665		/**
666	<	* drainTo empties full queue, unblocking a waiting put.
666	>	* drainTo(c) empties full queue, unblocking a waiting put.
667		*/
668		public void testDrainToWithActivePut() throws InterruptedException {
669		final LinkedTransferQueue q = populatedQueue(SIZE);
670		Thread t = newStartedThread(new CheckedRunnable() {
671	<	void realRun() {
671	>	public void realRun() {
672		q.put(SIZE + 1);
673		}});
674		ArrayList l = new ArrayList();
675		q.drainTo(l);
676		assertTrue(l.size() >= SIZE);
677	<	for (int i = 0; i < SIZE; ++i) {
678	<	assertEquals(l.get(i), i);
679	<	}
807	<	t.join();
677	>	for (int i = 0; i < SIZE; ++i)
678	>	assertEquals(i, l.get(i));
679	>	awaitTermination(t, MEDIUM_DELAY_MS);
680		assertTrue(q.size() + l.size() >= SIZE);
681		}
682
683		/**
684	<	* 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
684	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
685		*/
686		public void testDrainToN() {
687		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 844 | Line 692 | public class LinkedTransferQueueTest ext
692		ArrayList l = new ArrayList();
693		q.drainTo(l, i);
694		int k = (i < SIZE) ? i : SIZE;
695	<	assertEquals(l.size(), k);
696	<	assertEquals(q.size(), SIZE - k);
697	<	for (int j = 0; j < k; ++j) {
698	<	assertEquals(l.get(j), j);
851	<	}
695	>	assertEquals(k, l.size());
696	>	assertEquals(SIZE - k, q.size());
697	>	for (int j = 0; j < k; ++j)
698	>	assertEquals(j, l.get(j));
699		while (q.poll() != null)
700		;
701		}
702		}
703
704		/**
705	<	* poll and take decrement the waiting consumer count
705	>	* timed poll() or take() increments the waiting consumer count;
706	>	* offer(e) decrements the waiting consumer count
707		*/
708		public void testWaitingConsumer() throws InterruptedException {
709		final LinkedTransferQueue q = new LinkedTransferQueue();
710	<	final ConsumerObserver waiting = new ConsumerObserver();
710	>	assertEquals(0, q.getWaitingConsumerCount());
711	>	assertFalse(q.hasWaitingConsumer());
712	>	final CountDownLatch threadStarted = new CountDownLatch(1);
713
714		Thread t = newStartedThread(new CheckedRunnable() {
715	<	void realRun() throws InterruptedException {
716	<	Thread.sleep(SMALL_DELAY_MS);
717	<	threadAssertTrue(q.hasWaitingConsumer());
718	<	waiting.setWaitingConsumer(q.getWaitingConsumerCount());
719	<	threadAssertTrue(q.offer(new Object()));
715	>	public void realRun() throws InterruptedException {
716	>	threadStarted.countDown();
717	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
718	>	assertEquals(0, q.getWaitingConsumerCount());
719	>	assertFalse(q.hasWaitingConsumer());
720		}});
721
722	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) != null);
723	<	assertTrue(q.getWaitingConsumerCount()
724	<	< waiting.getWaitingConsumers());
725	<	t.join();
722	>	threadStarted.await();
723	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
724	>	assertEquals(1, q.getWaitingConsumerCount());
725	>	assertTrue(q.hasWaitingConsumer());
726	>
727	>	assertTrue(q.offer(one));
728	>	assertEquals(0, q.getWaitingConsumerCount());
729	>	assertFalse(q.hasWaitingConsumer());
730	>
731	>	awaitTermination(t, MEDIUM_DELAY_MS);
732		}
733
734		/**
#	Line 883 | Line 739 | public class LinkedTransferQueueTest ext
739		LinkedTransferQueue q = new LinkedTransferQueue();
740		q.transfer(null);
741		shouldThrow();
742	<	} catch (NullPointerException ex) {
887	<	}
742	>	} catch (NullPointerException success) {}
743		}
744
745		/**
#	Line 894 | Line 749 | public class LinkedTransferQueueTest ext
749		public void testTransfer2() throws InterruptedException {
750		final LinkedTransferQueue<Integer> q
751		= new LinkedTransferQueue<Integer>();
752	+	final CountDownLatch threadStarted = new CountDownLatch(1);
753
754		Thread t = newStartedThread(new CheckedRunnable() {
755	<	void realRun() throws InterruptedException {
756	<	q.transfer(SIZE);
757	<	threadAssertTrue(q.isEmpty());
755	>	public void realRun() throws InterruptedException {
756	>	threadStarted.countDown();
757	>	q.transfer(five);
758	>	checkEmpty(q);
759		}});
760
761	<	Thread.sleep(SHORT_DELAY_MS);
761	>	threadStarted.await();
762	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
763		assertEquals(1, q.size());
764	<	assertEquals(SIZE, (int) q.poll());
765	<	assertTrue(q.isEmpty());
766	<	t.join();
764	>	assertSame(five, q.poll());
765	>	checkEmpty(q);
766	>	awaitTermination(t, MEDIUM_DELAY_MS);
767		}
768
769		/**
#	Line 916 | Line 774 | public class LinkedTransferQueueTest ext
774		= new LinkedTransferQueue<Integer>();
775
776		Thread first = newStartedThread(new CheckedRunnable() {
777	<	void realRun() throws InterruptedException {
778	<	Integer i = SIZE + 1;
779	<	q.transfer(i);
780	<	threadAssertTrue(!q.contains(i));
923	<	threadAssertEquals(1, q.size());
777	>	public void realRun() throws InterruptedException {
778	>	q.transfer(four);
779	>	assertTrue(!q.contains(four));
780	>	assertEquals(1, q.size());
781		}});
782
783		Thread interruptedThread = newStartedThread(
784		new CheckedInterruptedRunnable() {
785	<	void realRun() throws InterruptedException {
786	<	while (q.size() == 0)
785	>	public void realRun() throws InterruptedException {
786	>	while (q.isEmpty())
787		Thread.yield();
788	<	q.transfer(SIZE);
788	>	q.transfer(five);
789		}});
790
791		while (q.size() < 2)
792		Thread.yield();
793		assertEquals(2, q.size());
794	<	assertEquals(SIZE + 1, (int) q.poll());
794	>	assertSame(four, q.poll());
795		first.join();
796		assertEquals(1, q.size());
797		interruptedThread.interrupt();
798		interruptedThread.join();
799	<	assertEquals(0, q.size());
943	<	assertTrue(q.isEmpty());
799	>	checkEmpty(q);
800		}
801
802		/**
#	Line 951 | Line 807 | public class LinkedTransferQueueTest ext
807		final LinkedTransferQueue q = new LinkedTransferQueue();
808
809		Thread t = newStartedThread(new CheckedRunnable() {
810	<	void realRun() throws InterruptedException {
810	>	public void realRun() throws InterruptedException {
811		q.transfer(four);
812	<	threadAssertFalse(q.contains(four));
813	<	threadAssertEquals(three, q.poll());
812	>	assertFalse(q.contains(four));
813	>	assertSame(three, q.poll());
814		}});
815
816	<	Thread.sleep(SHORT_DELAY_MS);
816	>	while (q.isEmpty())
817	>	Thread.yield();
818	>	assertFalse(q.isEmpty());
819	>	assertEquals(1, q.size());
820		assertTrue(q.offer(three));
821	<	assertEquals(four, q.poll());
822	<	t.join();
821	>	assertSame(four, q.poll());
822	>	awaitTermination(t, MEDIUM_DELAY_MS);
823		}
824
825		/**
#	Line 972 | Line 831 | public class LinkedTransferQueueTest ext
831		= new LinkedTransferQueue<Integer>();
832
833		Thread t = newStartedThread(new CheckedRunnable() {
834	<	void realRun() throws InterruptedException {
835	<	q.transfer(SIZE);
834	>	public void realRun() throws InterruptedException {
835	>	q.transfer(four);
836		checkEmpty(q);
837		}});
838
839	<	Thread.sleep(SHORT_DELAY_MS);
840	<	assertEquals(SIZE, (int) q.take());
839	>	while (q.isEmpty())
840	>	Thread.yield();
841	>	assertFalse(q.isEmpty());
842	>	assertEquals(1, q.size());
843	>	assertSame(four, q.take());
844		checkEmpty(q);
845	<	t.join();
845	>	awaitTermination(t, MEDIUM_DELAY_MS);
846		}
847
848		/**
#	Line 991 | Line 853 | public class LinkedTransferQueueTest ext
853		final LinkedTransferQueue q = new LinkedTransferQueue();
854		q.tryTransfer(null);
855		shouldThrow();
856	<	} catch (NullPointerException ex) {
995	<	}
856	>	} catch (NullPointerException success) {}
857		}
858
859		/**
#	Line 1015 | Line 876 | public class LinkedTransferQueueTest ext
876		final LinkedTransferQueue q = new LinkedTransferQueue();
877
878		Thread t = newStartedThread(new CheckedRunnable() {
879	<	void realRun() {
879	>	public void realRun() {
880		while (! q.hasWaitingConsumer())
881		Thread.yield();
882	<	threadAssertTrue(q.hasWaitingConsumer());
883	<	threadAssertTrue(q.isEmpty());
884	<	threadAssertTrue(q.size() == 0);
1024	<	threadAssertTrue(q.tryTransfer(hotPotato));
882	>	assertTrue(q.hasWaitingConsumer());
883	>	checkEmpty(q);
884	>	assertTrue(q.tryTransfer(hotPotato));
885		}});
886
887	<	assertTrue(q.poll(MEDIUM_DELAY_MS, MILLISECONDS) == hotPotato);
887	>	assertSame(hotPotato, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
888		checkEmpty(q);
889	<	t.join();
889	>	awaitTermination(t, MEDIUM_DELAY_MS);
890		}
891
892		/**
#	Line 1038 | Line 898 | public class LinkedTransferQueueTest ext
898		final LinkedTransferQueue q = new LinkedTransferQueue();
899
900		Thread t = newStartedThread(new CheckedRunnable() {
901	<	void realRun() {
901	>	public void realRun() {
902		while (! q.hasWaitingConsumer())
903		Thread.yield();
904	<	threadAssertTrue(q.hasWaitingConsumer());
905	<	threadAssertTrue(q.isEmpty());
906	<	threadAssertTrue(q.size() == 0);
1047	<	threadAssertTrue(q.tryTransfer(hotPotato));
904	>	assertTrue(q.hasWaitingConsumer());
905	>	checkEmpty(q);
906	>	assertTrue(q.tryTransfer(hotPotato));
907		}});
908
909	<	assertTrue(q.take() == hotPotato);
909	>	assertSame(q.take(), hotPotato);
910		checkEmpty(q);
911	<	t.join();
911	>	awaitTermination(t, MEDIUM_DELAY_MS);
912		}
913
914		/**
915	<	* tryTransfer waits the amount given if interrupted, and
1057	<	* throws interrupted exception
915	>	* tryTransfer blocks interruptibly if no takers
916		*/
917		public void testTryTransfer5() throws InterruptedException {
918		final LinkedTransferQueue q = new LinkedTransferQueue();
919	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
920	+	assertTrue(q.isEmpty());
921
922	<	Thread toInterrupt = newStartedThread(new CheckedInterruptedRunnable() {
923	<	void realRun() throws InterruptedException {
924	<	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
922	>	Thread t = newStartedThread(new CheckedRunnable() {
923	>	public void realRun() throws InterruptedException {
924	>	Thread.currentThread().interrupt();
925	>	try {
926	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
927	>	shouldThrow();
928	>	} catch (InterruptedException success) {}
929	>	assertFalse(Thread.interrupted());
930	>
931	>	pleaseInterrupt.countDown();
932	>	try {
933	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
934	>	shouldThrow();
935	>	} catch (InterruptedException success) {}
936	>	assertFalse(Thread.interrupted());
937		}});
938
939	<	Thread.sleep(SMALL_DELAY_MS);
940	<	toInterrupt.interrupt();
941	<	toInterrupt.join();
939	>	await(pleaseInterrupt);
940	>	assertThreadStaysAlive(t);
941	>	t.interrupt();
942	>	awaitTermination(t);
943	>	checkEmpty(q);
944		}
945
946		/**
947	<	* tryTransfer gives up after the timeout and return false
947	>	* tryTransfer gives up after the timeout and returns false
948		*/
949		public void testTryTransfer6() throws InterruptedException {
950		final LinkedTransferQueue q = new LinkedTransferQueue();
951
952		Thread t = newStartedThread(new CheckedRunnable() {
953	<	void realRun() throws InterruptedException {
954	<	threadAssertFalse
955	<	(q.tryTransfer(new Object(),
956	<	SHORT_DELAY_MS, MILLISECONDS));
953	>	public void realRun() throws InterruptedException {
954	>	long t0 = System.nanoTime();
955	>	assertFalse(q.tryTransfer(new Object(),
956	>	timeoutMillis(), MILLISECONDS));
957	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
958	>	checkEmpty(q);
959		}});
960
961	<	Thread.sleep(SMALL_DELAY_MS);
961	>	awaitTermination(t);
962		checkEmpty(q);
1087	–	t.join();
963		}
964
965		/**
#	Line 1096 | Line 971 | public class LinkedTransferQueueTest ext
971		assertTrue(q.offer(four));
972
973		Thread t = newStartedThread(new CheckedRunnable() {
974	<	void realRun() throws InterruptedException {
975	<	threadAssertTrue(q.tryTransfer(five,
976	<	MEDIUM_DELAY_MS, MILLISECONDS));
1102	<	threadAssertTrue(q.isEmpty());
974	>	public void realRun() throws InterruptedException {
975	>	assertTrue(q.tryTransfer(five, MEDIUM_DELAY_MS, MILLISECONDS));
976	>	checkEmpty(q);
977		}});
978
979	<	Thread.sleep(SHORT_DELAY_MS);
979	>	while (q.size() != 2)
980	>	Thread.yield();
981		assertEquals(2, q.size());
982	<	assertEquals(four, q.poll());
983	<	assertEquals(five, q.poll());
982	>	assertSame(four, q.poll());
983	>	assertSame(five, q.poll());
984		checkEmpty(q);
985	<	t.join();
985	>	awaitTermination(t, MEDIUM_DELAY_MS);
986		}
987
988		/**
989	<	* tryTransfer attempts to enqueue into the q and fails returning
990	<	* false not enqueueing and the successive poll is null
989	>	* tryTransfer attempts to enqueue into the queue and fails
990	>	* returning false not enqueueing and the successive poll is null
991		*/
992		public void testTryTransfer8() throws InterruptedException {
993		final LinkedTransferQueue q = new LinkedTransferQueue();
994		assertTrue(q.offer(four));
995		assertEquals(1, q.size());
996	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
996	>	long t0 = System.nanoTime();
997	>	assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
998	>	assertTrue(millisElapsedSince(t0) >= timeoutMillis());
999		assertEquals(1, q.size());
1000	<	assertEquals(four, q.poll());
1124	<	checkEmpty(q);
1000	>	assertSame(four, q.poll());
1001		assertNull(q.poll());
1002	+	checkEmpty(q);
1003		}
1004
1005		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1006		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1007	<	assertTrue(q.isEmpty());
1007	>	checkEmpty(q);
1008		for (int i = 0; i < n; i++) {
1009		assertEquals(i, q.size());
1010		assertTrue(q.offer(i));
#	Line 1136 | Line 1013 | public class LinkedTransferQueueTest ext
1013		assertFalse(q.isEmpty());
1014		return q;
1015		}
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	–	}
1016		}

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