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

Comparing jsr166/src/test/tck/LinkedTransferQueueTest.java (file contents):
Revision 1.9 by jsr166, Wed Aug 5 00:43:23 2009 UTC vs.
Revision 1.33 by jsr166, Fri Oct 29 06:22:12 2010 UTC

#	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.Iterator;
17	+	import java.util.List;
18		import java.util.NoSuchElementException;
19		import java.util.concurrent.*;
20		import static java.util.concurrent.TimeUnit.MILLISECONDS;
21	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
22		import junit.framework.Test;
23		import junit.framework.TestSuite;
24
25	+	@SuppressWarnings({"unchecked", "rawtypes"})
26		public class LinkedTransferQueueTest extends JSR166TestCase {
27
28	+	public static class Generic extends BlockingQueueTest {
29	+	protected BlockingQueue emptyCollection() {
30	+	return new LinkedTransferQueue();
31	+	}
32	+	}
33	+
34		public static void main(String[] args) {
35		junit.textui.TestRunner.run(suite());
36		}
37
38		public static Test suite() {
39	<	return new TestSuite(LinkedTransferQueueTest.class);
39	>	return newTestSuite(LinkedTransferQueueTest.class,
40	>	new Generic().testSuite());
41	>	}
42	>
43	>	void checkEmpty(BlockingQueue q) {
44	>	try {
45	>	assertTrue(q.isEmpty());
46	>	assertEquals(0, q.size());
47	>	assertNull(q.peek());
48	>	assertNull(q.poll());
49	>	assertNull(q.poll(0, MILLISECONDS));
50	>	assertEquals(q.toString(), "[]");
51	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
52	>	assertFalse(q.iterator().hasNext());
53	>	try {
54	>	q.element();
55	>	shouldThrow();
56	>	} catch (NoSuchElementException success) {}
57	>	try {
58	>	q.iterator().next();
59	>	shouldThrow();
60	>	} catch (NoSuchElementException success) {}
61	>	try {
62	>	q.remove();
63	>	shouldThrow();
64	>	} catch (NoSuchElementException success) {}
65	>	} catch (InterruptedException ie) {
66	>	threadUnexpectedException(ie);
67	>	}
68		}
69
70		/**
#	Line 48 | Line 84 | public class LinkedTransferQueueTest ext
84		try {
85		new LinkedTransferQueue(null);
86		shouldThrow();
87	<	} catch (NullPointerException success) {
52	<	}
87	>	} catch (NullPointerException success) {}
88		}
89
90		/**
#	Line 61 | Line 96 | public class LinkedTransferQueueTest ext
96		Integer[] ints = new Integer[SIZE];
97		new LinkedTransferQueue(Arrays.asList(ints));
98		shouldThrow();
99	<	} catch (NullPointerException success) {
65	<	}
99	>	} catch (NullPointerException success) {}
100		}
101
102		/**
#	Line 77 | Line 111 | public class LinkedTransferQueueTest ext
111		}
112		new LinkedTransferQueue(Arrays.asList(ints));
113		shouldThrow();
114	<	} catch (NullPointerException success) {
81	<	}
114	>	} catch (NullPointerException success) {}
115		}
116
117		/**
118		* Queue contains all elements of the collection it is initialized by
119		*/
120		public void testConstructor5() {
121	<	try {
122	<	Integer[] ints = new Integer[SIZE];
123	<	for (int i = 0; i < SIZE; ++i) {
124	<	ints[i] = i;
125	<	}
126	<	LinkedTransferQueue q
127	<	= new LinkedTransferQueue(Arrays.asList(ints));
128	<	for (int i = 0; i < SIZE; ++i) {
129	<	assertEquals(ints[i], q.poll());
130	<	}
131	<	} finally {
121	>	Integer[] ints = new Integer[SIZE];
122	>	for (int i = 0; i < SIZE; ++i) {
123	>	ints[i] = i;
124	>	}
125	>	List intList = Arrays.asList(ints);
126	>	LinkedTransferQueue q
127	>	= new LinkedTransferQueue(intList);
128	>	assertEquals(q.size(), intList.size());
129	>	assertEquals(q.toString(), intList.toString());
130	>	assertTrue(Arrays.equals(q.toArray(),
131	>	intList.toArray()));
132	>	assertTrue(Arrays.equals(q.toArray(new Object[0]),
133	>	intList.toArray(new Object[0])));
134	>	assertTrue(Arrays.equals(q.toArray(new Object[SIZE]),
135	>	intList.toArray(new Object[SIZE])));
136	>	for (int i = 0; i < SIZE; ++i) {
137	>	assertEquals(ints[i], q.poll());
138		}
139		}
140
141		/**
142	<	* Remaining capacity never decrease nor increase on add or remove
142	>	* remainingCapacity() always returns Integer.MAX_VALUE
143		*/
144		public void testRemainingCapacity() {
145		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
#	Line 124 | Line 163 | public class LinkedTransferQueueTest ext
163		LinkedTransferQueue q = new LinkedTransferQueue();
164		q.offer(null);
165		shouldThrow();
166	<	} catch (NullPointerException success) {
128	<	}
166	>	} catch (NullPointerException success) {}
167		}
168
169		/**
#	Line 136 | Line 174 | public class LinkedTransferQueueTest ext
174		LinkedTransferQueue q = new LinkedTransferQueue();
175		q.add(null);
176		shouldThrow();
177	<	} catch (NullPointerException success) {
140	<	}
177	>	} catch (NullPointerException success) {}
178		}
179
180		/**
#	Line 148 | Line 185 | public class LinkedTransferQueueTest ext
185		LinkedTransferQueue q = new LinkedTransferQueue();
186		q.addAll(null);
187		shouldThrow();
188	<	} catch (NullPointerException success) {
152	<	}
188	>	} catch (NullPointerException success) {}
189		}
190
191		/**
#	Line 160 | Line 196 | public class LinkedTransferQueueTest ext
196		LinkedTransferQueue q = populatedQueue(SIZE);
197		q.addAll(q);
198		shouldThrow();
199	<	} catch (IllegalArgumentException success) {
164	<	}
199	>	} catch (IllegalArgumentException success) {}
200		}
201
202		/**
#	Line 173 | Line 208 | public class LinkedTransferQueueTest ext
208		Integer[] ints = new Integer[SIZE];
209		q.addAll(Arrays.asList(ints));
210		shouldThrow();
211	<	} catch (NullPointerException success) {
177	<	}
211	>	} catch (NullPointerException success) {}
212		}
213
214		/**
#	Line 190 | Line 224 | public class LinkedTransferQueueTest ext
224		}
225		q.addAll(Arrays.asList(ints));
226		shouldThrow();
227	<	} catch (NullPointerException success) {
194	<	}
227	>	} catch (NullPointerException success) {}
228		}
229
230		/**
#	Line 228 | Line 261 | public class LinkedTransferQueueTest ext
261		public void testPut() {
262		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
263		for (int i = 0; i < SIZE; ++i) {
264	+	assertEquals(q.size(), i);
265		q.put(i);
266		assertTrue(q.contains(i));
267		}
234	–	assertEquals(q.size(), SIZE);
268		}
269
270		/**
#	Line 245 | Line 278 | public class LinkedTransferQueueTest ext
278		}
279
280		/**
281	<	* take blocks interruptibly when empty
249	<	*/
250	<	public void testTakeFromEmpty() throws InterruptedException {
251	<	final LinkedTransferQueue q = new LinkedTransferQueue();
252	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
253	<	void realRun() throws InterruptedException {
254	<	q.take();
255	<	}});
256	<	Thread.sleep(SHORT_DELAY_MS);
257	<	t.interrupt();
258	<	t.join();
259	<	}
260	<
261	<	/**
262	<	* Take removes existing elements until empty, then blocks interruptibly
281	>	* take removes existing elements until empty, then blocks interruptibly
282		*/
283		public void testBlockingTake() throws InterruptedException {
284	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
285	<	void realRun() throws InterruptedException {
286	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
284	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
285	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
286	>	Thread t = newStartedThread(new CheckedRunnable() {
287	>	public void realRun() throws InterruptedException {
288		for (int i = 0; i < SIZE; ++i) {
289	<	threadAssertEquals(i, (int) q.take());
289	>	assertEquals(i, (int) q.take());
290		}
291	<	q.take();
291	>	aboutToWait.countDown();
292	>	try {
293	>	q.take();
294	>	shouldThrow();
295	>	} catch (InterruptedException success) {}
296		}});
297	<	Thread.sleep(SHORT_DELAY_MS);
297	>
298	>	aboutToWait.await();
299	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
300		t.interrupt();
301	<	t.join();
301	>	awaitTermination(t, MEDIUM_DELAY_MS);
302	>	checkEmpty(q);
303		}
304
305		/**
306		* poll succeeds unless empty
307		*/
308	<	public void testPoll() {
308	>	public void testPoll() throws InterruptedException {
309		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
310		for (int i = 0; i < SIZE; ++i) {
311		assertEquals(i, (int) q.poll());
312		}
313		assertNull(q.poll());
314	+	checkEmpty(q);
315		}
316
317		/**
318	<	* timed pool with zero timeout succeeds when non-empty, else times out
318	>	* timed poll with zero timeout succeeds when non-empty, else times out
319		*/
320		public void testTimedPoll0() throws InterruptedException {
321		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
#	Line 295 | Line 323 | public class LinkedTransferQueueTest ext
323		assertEquals(i, (int) q.poll(0, MILLISECONDS));
324		}
325		assertNull(q.poll(0, MILLISECONDS));
326	+	checkEmpty(q);
327		}
328
329		/**
330	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
330	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
331		*/
332		public void testTimedPoll() throws InterruptedException {
333		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
334		for (int i = 0; i < SIZE; ++i) {
335	<	assertEquals(i, (int) q.poll(SHORT_DELAY_MS, MILLISECONDS));
335	>	long t0 = System.nanoTime();
336	>	assertEquals(i, (int) q.poll(SMALL_DELAY_MS, MILLISECONDS));
337	>	assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS);
338		}
339	+	long t0 = System.nanoTime();
340		assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
341	+	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
342	+	checkEmpty(q);
343		}
344
345		/**
#	Line 313 | Line 347 | public class LinkedTransferQueueTest ext
347		* returning timeout status
348		*/
349		public void testInterruptedTimedPoll() throws InterruptedException {
350	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
351	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
352	<	void realRun() throws InterruptedException {
350	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
351	>	final CountDownLatch aboutToWait = new CountDownLatch(1);
352	>	Thread t = newStartedThread(new CheckedRunnable() {
353	>	public void realRun() throws InterruptedException {
354		for (int i = 0; i < SIZE; ++i) {
355	<	threadAssertEquals(i, (int) q.poll(LONG_DELAY_MS,
356	<	MILLISECONDS));
355	>	long t0 = System.nanoTime();
356	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
357	>	assertTrue(millisElapsedSince(t0) < SHORT_DELAY_MS);
358		}
359	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
359	>	aboutToWait.countDown();
360	>	try {
361	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
362	>	shouldThrow();
363	>	} catch (InterruptedException success) {}
364		}});
365	<	Thread.sleep(SMALL_DELAY_MS);
365	>
366	>	aboutToWait.await();
367	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
368		t.interrupt();
369	<	t.join();
370	<	assertEquals(q.size(), 0);
329	<	assertNull(q.poll());
369	>	awaitTermination(t, MEDIUM_DELAY_MS);
370	>	checkEmpty(q);
371		}
372
373		/**
374	<	* timed poll before a delayed offer fails; after offer succeeds;
375	<	* on interruption throws
374	>	* timed poll after thread interrupted throws InterruptedException
375	>	* instead of returning timeout status
376		*/
377	<	public void testTimedPollWithOffer() throws InterruptedException {
378	<	final LinkedTransferQueue q = new LinkedTransferQueue();
379	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
380	<	void realRun() throws InterruptedException {
381	<	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
382	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
383	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
377	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
378	>	final BlockingQueue<Integer> q = populatedQueue(SIZE);
379	>	Thread t = newStartedThread(new CheckedRunnable() {
380	>	public void realRun() throws InterruptedException {
381	>	Thread.currentThread().interrupt();
382	>	for (int i = 0; i < SIZE; ++i) {
383	>	long t0 = System.nanoTime();
384	>	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
385	>	assertTrue(millisElapsedSince(t0) < SHORT_DELAY_MS);
386	>	}
387	>	try {
388	>	q.poll(MEDIUM_DELAY_MS, MILLISECONDS);
389	>	shouldThrow();
390	>	} catch (InterruptedException success) {}
391		}});
392	<	Thread.sleep(SMALL_DELAY_MS);
393	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
394	<	t.interrupt();
347	<	t.join();
392	>
393	>	awaitTermination(t, MEDIUM_DELAY_MS);
394	>	checkEmpty(q);
395		}
396
397		/**
398		* peek returns next element, or null if empty
399		*/
400	<	public void testPeek() {
400	>	public void testPeek() throws InterruptedException {
401		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
402		for (int i = 0; i < SIZE; ++i) {
403		assertEquals(i, (int) q.peek());
#	Line 359 | Line 406 | public class LinkedTransferQueueTest ext
406		i != (int) q.peek());
407		}
408		assertNull(q.peek());
409	+	checkEmpty(q);
410		}
411
412		/**
413		* element returns next element, or throws NoSuchElementException if empty
414		*/
415	<	public void testElement() {
415	>	public void testElement() throws InterruptedException {
416		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
417		for (int i = 0; i < SIZE; ++i) {
418		assertEquals(i, (int) q.element());
#	Line 373 | Line 421 | public class LinkedTransferQueueTest ext
421		try {
422		q.element();
423		shouldThrow();
424	<	} catch (NoSuchElementException success) {
425	<	}
424	>	} catch (NoSuchElementException success) {}
425	>	checkEmpty(q);
426		}
427
428		/**
429		* remove removes next element, or throws NoSuchElementException if empty
430		*/
431	<	public void testRemove() {
431	>	public void testRemove() throws InterruptedException {
432		LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
433		for (int i = 0; i < SIZE; ++i) {
434		assertEquals(i, (int) q.remove());
#	Line 388 | Line 436 | public class LinkedTransferQueueTest ext
436		try {
437		q.remove();
438		shouldThrow();
439	<	} catch (NoSuchElementException success) {
440	<	}
439	>	} catch (NoSuchElementException success) {}
440	>	checkEmpty(q);
441		}
442
443		/**
444		* remove(x) removes x and returns true if present
445		*/
446	<	public void testRemoveElement() {
446	>	public void testRemoveElement() throws InterruptedException {
447		LinkedTransferQueue q = populatedQueue(SIZE);
448		for (int i = 1; i < SIZE; i += 2) {
449		assertTrue(q.remove(i));
#	Line 404 | Line 452 | public class LinkedTransferQueueTest ext
452		assertTrue(q.remove(i));
453		assertFalse(q.remove(i + 1));
454		}
455	<	assertTrue(q.isEmpty());
455	>	checkEmpty(q);
456		}
457
458		/**
#	Line 417 | Line 465 | public class LinkedTransferQueueTest ext
465		assertTrue(q.remove(one));
466		assertTrue(q.remove(two));
467		assertTrue(q.add(three));
468	<	assertTrue(q.take() != null);
468	>	assertSame(q.take(), three);
469		}
470
471		/**
#	Line 435 | Line 483 | public class LinkedTransferQueueTest ext
483		/**
484		* clear removes all elements
485		*/
486	<	public void testClear() {
486	>	public void testClear() throws InterruptedException {
487		LinkedTransferQueue q = populatedQueue(SIZE);
488		q.clear();
489	<	assertTrue(q.isEmpty());
442	<	assertEquals(0, q.size());
489	>	checkEmpty(q);
490		assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
491		q.add(one);
492		assertFalse(q.isEmpty());
493	+	assertEquals(1, q.size());
494		assertTrue(q.contains(one));
495		q.clear();
496	<	assertTrue(q.isEmpty());
496	>	checkEmpty(q);
497		}
498
499		/**
#	Line 499 | Line 547 | public class LinkedTransferQueueTest ext
547		}
548
549		/**
550	<	* toArray contains all elements
550	>	* toArray() contains all elements
551		*/
552		public void testToArray() throws InterruptedException {
553		LinkedTransferQueue q = populatedQueue(SIZE);
#	Line 525 | Line 573 | public class LinkedTransferQueueTest ext
573		* toArray(null) throws NullPointerException
574		*/
575		public void testToArray_BadArg() {
576	+	LinkedTransferQueue q = populatedQueue(SIZE);
577		try {
529	–	LinkedTransferQueue q = populatedQueue(SIZE);
578		Object o[] = q.toArray(null);
579		shouldThrow();
580	<	} catch (NullPointerException success) {
533	<	}
580	>	} catch (NullPointerException success) {}
581		}
582
583		/**
584	<	* toArray with incompatible array type throws CCE
584	>	* toArray(incompatible array type) throws CCE
585		*/
586		public void testToArray1_BadArg() {
587	+	LinkedTransferQueue q = populatedQueue(SIZE);
588		try {
541	–	LinkedTransferQueue q = populatedQueue(SIZE);
589		Object o[] = q.toArray(new String[10]);
590		shouldThrow();
591	<	} catch (ArrayStoreException success) {
545	<	}
591	>	} catch (ArrayStoreException success) {}
592		}
593
594		/**
#	Line 551 | Line 597 | public class LinkedTransferQueueTest ext
597		public void testIterator() throws InterruptedException {
598		LinkedTransferQueue q = populatedQueue(SIZE);
599		Iterator it = q.iterator();
600	+	int i = 0;
601		while (it.hasNext()) {
602	<	assertEquals(it.next(), q.take());
602	>	assertEquals(it.next(), i++);
603		}
604	+	assertEquals(i, SIZE);
605		}
606
607		/**
608	<	* iterator.remove removes current element
608	>	* iterator.remove() removes current element
609		*/
610		public void testIteratorRemove() {
611		final LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 570 | Line 618 | public class LinkedTransferQueueTest ext
618		it.remove();
619
620		it = q.iterator();
621	<	assertEquals(it.next(), one);
622	<	assertEquals(it.next(), three);
621	>	assertSame(it.next(), one);
622	>	assertSame(it.next(), three);
623		assertFalse(it.hasNext());
624		}
625
#	Line 624 | Line 672 | public class LinkedTransferQueueTest ext
672		*/
673		public void testOfferInExecutor() {
674		final LinkedTransferQueue q = new LinkedTransferQueue();
675	<	q.add(one);
628	<	q.add(two);
675	>	final CountDownLatch threadsStarted = new CountDownLatch(2);
676		ExecutorService executor = Executors.newFixedThreadPool(2);
677
678		executor.execute(new CheckedRunnable() {
679	<	void realRun() {
680	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS,
681	<	MILLISECONDS));
679	>	public void realRun() throws InterruptedException {
680	>	threadsStarted.countDown();
681	>	threadsStarted.await();
682	>	assertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
683		}});
684
685		executor.execute(new CheckedRunnable() {
686	<	void realRun() throws InterruptedException {
687	<	Thread.sleep(SMALL_DELAY_MS);
688	<	threadAssertEquals(one, q.take());
686	>	public void realRun() throws InterruptedException {
687	>	threadsStarted.countDown();
688	>	threadsStarted.await();
689	>	assertSame(one, q.take());
690	>	checkEmpty(q);
691		}});
692
693		joinPool(executor);
694		}
695
696		/**
697	<	* poll retrieves elements across Executor threads
697	>	* timed poll retrieves elements across Executor threads
698		*/
699		public void testPollInExecutor() {
700		final LinkedTransferQueue q = new LinkedTransferQueue();
701	+	final CountDownLatch threadsStarted = new CountDownLatch(2);
702		ExecutorService executor = Executors.newFixedThreadPool(2);
703
704		executor.execute(new CheckedRunnable() {
705	<	void realRun() throws InterruptedException {
706	<	threadAssertNull(q.poll());
707	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS,
708	<	MILLISECONDS));
709	<	threadAssertTrue(q.isEmpty());
705	>	public void realRun() throws InterruptedException {
706	>	assertNull(q.poll());
707	>	threadsStarted.countDown();
708	>	threadsStarted.await();
709	>	assertSame(one, q.poll(SMALL_DELAY_MS, MILLISECONDS));
710	>	checkEmpty(q);
711		}});
712
713		executor.execute(new CheckedRunnable() {
714	<	void realRun() throws InterruptedException {
715	<	Thread.sleep(SMALL_DELAY_MS);
714	>	public void realRun() throws InterruptedException {
715	>	threadsStarted.countDown();
716	>	threadsStarted.await();
717		q.put(one);
718		}});
719
#	Line 686 | Line 739 | public class LinkedTransferQueueTest ext
739		LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
740
741		assertEquals(q.size(), r.size());
742	+	assertEquals(q.toString(), r.toString());
743	+	assertTrue(Arrays.equals(q.toArray(), r.toArray()));
744		while (!q.isEmpty()) {
745		assertEquals(q.remove(), r.remove());
746		}
#	Line 699 | Line 754 | public class LinkedTransferQueueTest ext
754		try {
755		q.drainTo(null);
756		shouldThrow();
757	<	} catch (NullPointerException success) {
703	<	}
757	>	} catch (NullPointerException success) {}
758		}
759
760		/**
#	Line 711 | Line 765 | public class LinkedTransferQueueTest ext
765		try {
766		q.drainTo(q);
767		shouldThrow();
768	<	} catch (IllegalArgumentException success) {
715	<	}
768	>	} catch (IllegalArgumentException success) {}
769		}
770
771		/**
#	Line 742 | Line 795 | public class LinkedTransferQueueTest ext
795		}
796
797		/**
798	<	* drainTo empties full queue, unblocking a waiting put.
798	>	* drainTo(c) empties full queue, unblocking a waiting put.
799		*/
800		public void testDrainToWithActivePut() throws InterruptedException {
801		final LinkedTransferQueue q = populatedQueue(SIZE);
802		Thread t = newStartedThread(new CheckedRunnable() {
803	<	void realRun() {
803	>	public void realRun() {
804		q.put(SIZE + 1);
805		}});
806		ArrayList l = new ArrayList();
#	Line 756 | Line 809 | public class LinkedTransferQueueTest ext
809		for (int i = 0; i < SIZE; ++i) {
810		assertEquals(l.get(i), i);
811		}
812	<	t.join();
812	>	awaitTermination(t, MEDIUM_DELAY_MS);
813		assertTrue(q.size() + l.size() >= SIZE);
814		}
815
#	Line 766 | Line 819 | public class LinkedTransferQueueTest ext
819		public void testDrainToNullN() {
820		LinkedTransferQueue q = populatedQueue(SIZE);
821		try {
822	<	q.drainTo(null, 0);
822	>	q.drainTo(null, SIZE);
823		shouldThrow();
824	<	} catch (NullPointerException success) {
772	<	}
824	>	} catch (NullPointerException success) {}
825		}
826
827		/**
#	Line 778 | Line 830 | public class LinkedTransferQueueTest ext
830		public void testDrainToSelfN() {
831		LinkedTransferQueue q = populatedQueue(SIZE);
832		try {
833	<	q.drainTo(q, 0);
833	>	q.drainTo(q, SIZE);
834		shouldThrow();
835	<	} catch (IllegalArgumentException success) {
784	<	}
835	>	} catch (IllegalArgumentException success) {}
836		}
837
838		/**
839	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
839	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
840		*/
841		public void testDrainToN() {
842		LinkedTransferQueue q = new LinkedTransferQueue();
#	Line 807 | Line 858 | public class LinkedTransferQueueTest ext
858		}
859
860		/**
861	<	* poll and take decrement the waiting consumer count
861	>	* timed poll() or take() increments the waiting consumer count;
862	>	* offer(e) decrements the waiting consumer count
863		*/
864		public void testWaitingConsumer() throws InterruptedException {
865		final LinkedTransferQueue q = new LinkedTransferQueue();
866	<	final ConsumerObserver waiting = new ConsumerObserver();
866	>	assertEquals(q.getWaitingConsumerCount(), 0);
867	>	assertFalse(q.hasWaitingConsumer());
868	>	final CountDownLatch threadStarted = new CountDownLatch(1);
869
870		Thread t = newStartedThread(new CheckedRunnable() {
871	<	void realRun() throws InterruptedException {
872	<	Thread.sleep(SMALL_DELAY_MS);
873	<	threadAssertTrue(q.hasWaitingConsumer());
874	<	waiting.setWaitingConsumer(q.getWaitingConsumerCount());
875	<	threadAssertTrue(q.offer(new Object()));
871	>	public void realRun() throws InterruptedException {
872	>	threadStarted.countDown();
873	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
874	>	assertEquals(q.getWaitingConsumerCount(), 0);
875	>	assertFalse(q.hasWaitingConsumer());
876		}});
877
878	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) != null);
879	<	assertTrue(q.getWaitingConsumerCount()
880	<	< waiting.getWaitingConsumers());
881	<	t.join();
878	>	threadStarted.await();
879	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
880	>	assertEquals(q.getWaitingConsumerCount(), 1);
881	>	assertTrue(q.hasWaitingConsumer());
882	>
883	>	assertTrue(q.offer(one));
884	>	assertEquals(q.getWaitingConsumerCount(), 0);
885	>	assertFalse(q.hasWaitingConsumer());
886	>
887	>	awaitTermination(t, MEDIUM_DELAY_MS);
888		}
889
890		/**
#	Line 835 | Line 895 | public class LinkedTransferQueueTest ext
895		LinkedTransferQueue q = new LinkedTransferQueue();
896		q.transfer(null);
897		shouldThrow();
898	<	} catch (NullPointerException ex) {
839	<	}
898	>	} catch (NullPointerException success) {}
899		}
900
901		/**
#	Line 846 | Line 905 | public class LinkedTransferQueueTest ext
905		public void testTransfer2() throws InterruptedException {
906		final LinkedTransferQueue<Integer> q
907		= new LinkedTransferQueue<Integer>();
908	+	final CountDownLatch threadStarted = new CountDownLatch(1);
909
910		Thread t = newStartedThread(new CheckedRunnable() {
911	<	void realRun() throws InterruptedException {
911	>	public void realRun() throws InterruptedException {
912	>	threadStarted.countDown();
913		q.transfer(SIZE);
914	<	threadAssertTrue(q.isEmpty());
914	>	checkEmpty(q);
915		}});
916
917	<	Thread.sleep(SHORT_DELAY_MS);
917	>	threadStarted.await();
918	>	waitForThreadToEnterWaitState(t, SMALL_DELAY_MS);
919	>	assertTrue(t.isAlive());
920		assertEquals(1, q.size());
921		assertEquals(SIZE, (int) q.poll());
922	<	assertTrue(q.isEmpty());
923	<	t.join();
922	>	checkEmpty(q);
923	>	awaitTermination(t, MEDIUM_DELAY_MS);
924		}
925
926		/**
#	Line 868 | Line 931 | public class LinkedTransferQueueTest ext
931		= new LinkedTransferQueue<Integer>();
932
933		Thread first = newStartedThread(new CheckedRunnable() {
934	<	void realRun() throws InterruptedException {
935	<	Integer i = SIZE + 1;
936	<	q.transfer(i);
937	<	threadAssertTrue(!q.contains(i));
875	<	threadAssertEquals(1, q.size());
934	>	public void realRun() throws InterruptedException {
935	>	q.transfer(four);
936	>	assertTrue(!q.contains(four));
937	>	assertEquals(1, q.size());
938		}});
939
940		Thread interruptedThread = newStartedThread(
941		new CheckedInterruptedRunnable() {
942	<	void realRun() throws InterruptedException {
943	<	while (q.size() == 0)
942	>	public void realRun() throws InterruptedException {
943	>	while (q.isEmpty())
944		Thread.yield();
945	<	q.transfer(SIZE);
945	>	q.transfer(five);
946		}});
947
948		while (q.size() < 2)
949		Thread.yield();
950		assertEquals(2, q.size());
951	<	assertEquals(SIZE + 1, (int) q.poll());
951	>	assertSame(four, q.poll());
952		first.join();
953		assertEquals(1, q.size());
954		interruptedThread.interrupt();
955		interruptedThread.join();
956	<	assertEquals(0, q.size());
895	<	assertTrue(q.isEmpty());
956	>	checkEmpty(q);
957		}
958
959		/**
#	Line 903 | Line 964 | public class LinkedTransferQueueTest ext
964		final LinkedTransferQueue q = new LinkedTransferQueue();
965
966		Thread t = newStartedThread(new CheckedRunnable() {
967	<	void realRun() throws InterruptedException {
967	>	public void realRun() throws InterruptedException {
968		q.transfer(four);
969	<	threadAssertFalse(q.contains(four));
970	<	threadAssertEquals(three, q.poll());
969	>	assertFalse(q.contains(four));
970	>	assertSame(three, q.poll());
971		}});
972
973	<	Thread.sleep(SHORT_DELAY_MS);
973	>	while (q.isEmpty())
974	>	Thread.yield();
975	>	assertFalse(q.isEmpty());
976	>	assertEquals(1, q.size());
977		assertTrue(q.offer(three));
978	<	assertEquals(four, q.poll());
979	<	t.join();
978	>	assertSame(four, q.poll());
979	>	awaitTermination(t, MEDIUM_DELAY_MS);
980		}
981
982		/**
#	Line 924 | Line 988 | public class LinkedTransferQueueTest ext
988		= new LinkedTransferQueue<Integer>();
989
990		Thread t = newStartedThread(new CheckedRunnable() {
991	<	void realRun() throws InterruptedException {
992	<	q.transfer(SIZE);
993	<	threadAssertTrue(q.isEmpty());
991	>	public void realRun() throws InterruptedException {
992	>	q.transfer(four);
993	>	checkEmpty(q);
994		}});
995
996	<	Thread.sleep(SHORT_DELAY_MS);
997	<	assertEquals(SIZE, (int) q.take());
998	<	assertTrue(q.isEmpty());
999	<	t.join();
996	>	while (q.isEmpty())
997	>	Thread.yield();
998	>	assertFalse(q.isEmpty());
999	>	assertEquals(1, q.size());
1000	>	assertSame(four, q.take());
1001	>	checkEmpty(q);
1002	>	awaitTermination(t, MEDIUM_DELAY_MS);
1003		}
1004
1005		/**
#	Line 943 | Line 1010 | public class LinkedTransferQueueTest ext
1010		final LinkedTransferQueue q = new LinkedTransferQueue();
1011		q.tryTransfer(null);
1012		shouldThrow();
1013	<	} catch (NullPointerException ex) {
947	<	}
1013	>	} catch (NullPointerException success) {}
1014		}
1015
1016		/**
1017		* tryTransfer returns false and does not enqueue if there are no
1018		* consumers waiting to poll or take.
1019		*/
1020	<	public void testTryTransfer2() {
1020	>	public void testTryTransfer2() throws InterruptedException {
1021		final LinkedTransferQueue q = new LinkedTransferQueue();
1022		assertFalse(q.tryTransfer(new Object()));
1023		assertFalse(q.hasWaitingConsumer());
1024	<	assertTrue(q.isEmpty());
959	<	assertEquals(0, q.size());
1024	>	checkEmpty(q);
1025		}
1026
1027		/**
#	Line 968 | Line 1033 | public class LinkedTransferQueueTest ext
1033		final LinkedTransferQueue q = new LinkedTransferQueue();
1034
1035		Thread t = newStartedThread(new CheckedRunnable() {
1036	<	void realRun() {
1036	>	public void realRun() {
1037		while (! q.hasWaitingConsumer())
1038		Thread.yield();
1039	<	threadAssertTrue(q.hasWaitingConsumer());
1040	<	threadAssertTrue(q.isEmpty());
1041	<	threadAssertTrue(q.size() == 0);
977	<	threadAssertTrue(q.tryTransfer(hotPotato));
1039	>	assertTrue(q.hasWaitingConsumer());
1040	>	checkEmpty(q);
1041	>	assertTrue(q.tryTransfer(hotPotato));
1042		}});
1043
1044	<	assertTrue(q.poll(MEDIUM_DELAY_MS, MILLISECONDS) == hotPotato);
1045	<	assertTrue(q.isEmpty());
1046	<	t.join();
1044	>	assertSame(hotPotato, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
1045	>	checkEmpty(q);
1046	>	awaitTermination(t, MEDIUM_DELAY_MS);
1047		}
1048
1049		/**
#	Line 991 | Line 1055 | public class LinkedTransferQueueTest ext
1055		final LinkedTransferQueue q = new LinkedTransferQueue();
1056
1057		Thread t = newStartedThread(new CheckedRunnable() {
1058	<	void realRun() {
1058	>	public void realRun() {
1059		while (! q.hasWaitingConsumer())
1060		Thread.yield();
1061	<	threadAssertTrue(q.hasWaitingConsumer());
1062	<	threadAssertTrue(q.isEmpty());
1063	<	threadAssertTrue(q.size() == 0);
1000	<	threadAssertTrue(q.tryTransfer(hotPotato));
1061	>	assertTrue(q.hasWaitingConsumer());
1062	>	checkEmpty(q);
1063	>	assertTrue(q.tryTransfer(hotPotato));
1064		}});
1065
1066	<	assertTrue(q.take() == hotPotato);
1067	<	assertTrue(q.isEmpty());
1068	<	t.join();
1066	>	assertSame(q.take(), hotPotato);
1067	>	checkEmpty(q);
1068	>	awaitTermination(t, MEDIUM_DELAY_MS);
1069		}
1070
1071		/**
#	Line 1011 | Line 1074 | public class LinkedTransferQueueTest ext
1074		*/
1075		public void testTryTransfer5() throws InterruptedException {
1076		final LinkedTransferQueue q = new LinkedTransferQueue();
1077	+	final CountDownLatch threadStarted = new CountDownLatch(1);
1078
1079	<	Thread toInterrupt = newStartedThread(new CheckedInterruptedRunnable() {
1080	<	void realRun() throws InterruptedException {
1081	<	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
1079	>	Thread t = newStartedThread(new CheckedRunnable() {
1080	>	public void realRun() throws InterruptedException {
1081	>	long t0 = System.nanoTime();
1082	>	threadStarted.countDown();
1083	>	try {
1084	>	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
1085	>	shouldThrow();
1086	>	} catch (InterruptedException success) {}
1087	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
1088		}});
1089
1090	<	Thread.sleep(SMALL_DELAY_MS);
1091	<	toInterrupt.interrupt();
1092	<	toInterrupt.join();
1090	>	threadStarted.await();
1091	>	Thread.sleep(SHORT_DELAY_MS);
1092	>	t.interrupt();
1093	>	awaitTermination(t, MEDIUM_DELAY_MS);
1094	>	checkEmpty(q);
1095		}
1096
1097		/**
1098	<	* tryTransfer gives up after the timeout and return false
1098	>	* tryTransfer gives up after the timeout and returns false
1099		*/
1100		public void testTryTransfer6() throws InterruptedException {
1101		final LinkedTransferQueue q = new LinkedTransferQueue();
1102
1103		Thread t = newStartedThread(new CheckedRunnable() {
1104	<	void realRun() throws InterruptedException {
1105	<	threadAssertFalse
1106	<	(q.tryTransfer(new Object(),
1107	<	SHORT_DELAY_MS, MILLISECONDS));
1104	>	public void realRun() throws InterruptedException {
1105	>	long t0 = System.nanoTime();
1106	>	assertFalse(q.tryTransfer(new Object(),
1107	>	SHORT_DELAY_MS, MILLISECONDS));
1108	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
1109	>	checkEmpty(q);
1110		}});
1111
1112	<	Thread.sleep(SMALL_DELAY_MS);
1113	<	assertTrue(q.isEmpty());
1040	<	t.join();
1112	>	awaitTermination(t, MEDIUM_DELAY_MS);
1113	>	checkEmpty(q);
1114		}
1115
1116		/**
#	Line 1049 | Line 1122 | public class LinkedTransferQueueTest ext
1122		assertTrue(q.offer(four));
1123
1124		Thread t = newStartedThread(new CheckedRunnable() {
1125	<	void realRun() throws InterruptedException {
1126	<	threadAssertTrue(q.tryTransfer(five,
1127	<	MEDIUM_DELAY_MS, MILLISECONDS));
1055	<	threadAssertTrue(q.isEmpty());
1125	>	public void realRun() throws InterruptedException {
1126	>	assertTrue(q.tryTransfer(five, MEDIUM_DELAY_MS, MILLISECONDS));
1127	>	checkEmpty(q);
1128		}});
1129
1130	<	Thread.sleep(SHORT_DELAY_MS);
1130	>	while (q.size() != 2)
1131	>	Thread.yield();
1132		assertEquals(2, q.size());
1133	<	assertEquals(four, q.poll());
1134	<	assertEquals(five, q.poll());
1135	<	assertTrue(q.isEmpty());
1136	<	t.join();
1133	>	assertSame(four, q.poll());
1134	>	assertSame(five, q.poll());
1135	>	checkEmpty(q);
1136	>	awaitTermination(t, MEDIUM_DELAY_MS);
1137		}
1138
1139		/**
#	Line 1071 | Line 1144 | public class LinkedTransferQueueTest ext
1144		final LinkedTransferQueue q = new LinkedTransferQueue();
1145		assertTrue(q.offer(four));
1146		assertEquals(1, q.size());
1147	+	long t0 = System.nanoTime();
1148		assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
1149	+	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
1150		assertEquals(1, q.size());
1151	<	assertEquals(four, q.poll());
1077	<	threadAssertTrue(q.isEmpty());
1151	>	assertSame(four, q.poll());
1152		assertNull(q.poll());
1153	+	checkEmpty(q);
1154		}
1155
1156		private LinkedTransferQueue<Integer> populatedQueue(int n) {
1157		LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1158	<	assertTrue(q.isEmpty());
1158	>	checkEmpty(q);
1159		for (int i = 0; i < n; i++) {
1160		assertEquals(i, q.size());
1161		assertTrue(q.offer(i));
#	Line 1089 | Line 1164 | public class LinkedTransferQueueTest ext
1164		assertFalse(q.isEmpty());
1165		return q;
1166		}
1092	–
1093	–	private static class ConsumerObserver {
1094	–
1095	–	private int waitingConsumers;
1096	–
1097	–	private ConsumerObserver() {
1098	–	}
1099	–
1100	–	private void setWaitingConsumer(int i) {
1101	–	this.waitingConsumers = i;
1102	–	}
1103	–
1104	–	private int getWaitingConsumers() {
1105	–	return waitingConsumers;
1106	–	}
1107	–	}
1167		}

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