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

Comparing jsr166/src/test/tck/DelayQueueTest.java (file contents):
Revision 1.23 by jsr166, Sat Nov 21 21:00:34 2009 UTC vs.
Revision 1.54 by jsr166, Tue May 31 16:16:23 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 Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	<	import java.util.*;
10	>	import java.util.Arrays;
11	>	import java.util.ArrayList;
12	>	import java.util.Iterator;
13	>	import java.util.NoSuchElementException;
14	>	import java.util.concurrent.BlockingQueue;
15	>	import java.util.concurrent.CountDownLatch;
16	>	import java.util.concurrent.Delayed;
17	>	import java.util.concurrent.DelayQueue;
18	>	import java.util.concurrent.Executors;
19	>	import java.util.concurrent.ExecutorService;
20	>	import java.util.concurrent.TimeUnit;
21		import static java.util.concurrent.TimeUnit.MILLISECONDS;
12	–	import java.util.concurrent.*;
22
23		public class DelayQueueTest extends JSR166TestCase {
24	+
25	+	public static class Generic extends BlockingQueueTest {
26	+	protected BlockingQueue emptyCollection() {
27	+	return new DelayQueue();
28	+	}
29	+	protected PDelay makeElement(int i) {
30	+	return new PDelay(i);
31	+	}
32	+	}
33	+
34		public static void main(String[] args) {
35	<	junit.textui.TestRunner.run (suite());
35	>	junit.textui.TestRunner.run(suite());
36		}
37
38		public static Test suite() {
39	<	return new TestSuite(DelayQueueTest.class);
39	>	return newTestSuite(DelayQueueTest.class,
40	>	new Generic().testSuite());
41		}
42
43		private static final int NOCAP = Integer.MAX_VALUE;
44
45		/**
46		* A delayed implementation for testing.
47	<	* Most  tests use Pseudodelays, where delays are all elapsed
47	>	* Most tests use Pseudodelays, where delays are all elapsed
48		* (so, no blocking solely for delays) but are still ordered
49		*/
50		static class PDelay implements Delayed {
#	Line 32 | Line 52 | public class DelayQueueTest extends JSR1
52		PDelay(int i) { pseudodelay = Integer.MIN_VALUE + i; }
53		public int compareTo(PDelay y) {
54		int i = pseudodelay;
55	<	int j = ((PDelay)y).pseudodelay;
55	>	int j = y.pseudodelay;
56		if (i < j) return -1;
57		if (i > j) return 1;
58		return 0;
59		}
60
61		public int compareTo(Delayed y) {
62	<	int i = pseudodelay;
43	<	int j = ((PDelay)y).pseudodelay;
44	<	if (i < j) return -1;
45	<	if (i > j) return 1;
46	<	return 0;
62	>	return compareTo((PDelay)y);
63		}
64
65		public boolean equals(Object other) {
66	<	return ((PDelay)other).pseudodelay == pseudodelay;
66	>	return equals((PDelay)other);
67		}
68		public boolean equals(PDelay other) {
69	<	return ((PDelay)other).pseudodelay == pseudodelay;
69	>	return other.pseudodelay == pseudodelay;
70		}
71
56	–
72		public long getDelay(TimeUnit ignore) {
73		return pseudodelay;
74		}
#	Line 66 | Line 81 | public class DelayQueueTest extends JSR1
81		}
82		}
83
69	–
84		/**
85		* Delayed implementation that actually delays
86		*/
#	Line 77 | Line 91 | public class DelayQueueTest extends JSR1
91		}
92		public int compareTo(NanoDelay y) {
93		long i = trigger;
94	<	long j = ((NanoDelay)y).trigger;
94	>	long j = y.trigger;
95		if (i < j) return -1;
96		if (i > j) return 1;
97		return 0;
98		}
99
100		public int compareTo(Delayed y) {
101	<	long i = trigger;
88	<	long j = ((NanoDelay)y).trigger;
89	<	if (i < j) return -1;
90	<	if (i > j) return 1;
91	<	return 0;
101	>	return compareTo((NanoDelay)y);
102		}
103
104		public boolean equals(Object other) {
105	<	return ((NanoDelay)other).trigger == trigger;
105	>	return equals((NanoDelay)other);
106		}
107		public boolean equals(NanoDelay other) {
108	<	return ((NanoDelay)other).trigger == trigger;
108	>	return other.trigger == trigger;
109		}
110
111		public long getDelay(TimeUnit unit) {
#	Line 112 | Line 122 | public class DelayQueueTest extends JSR1
122		}
123		}
124
115	–
125		/**
126		* Create a queue of given size containing consecutive
127		* PDelays 0 ... n.
128		*/
129	<	private DelayQueue populatedQueue(int n) {
130	<	DelayQueue q = new DelayQueue();
129	>	private DelayQueue<PDelay> populatedQueue(int n) {
130	>	DelayQueue<PDelay> q = new DelayQueue<PDelay>();
131		assertTrue(q.isEmpty());
132		for (int i = n-1; i >= 0; i-=2)
133		assertTrue(q.offer(new PDelay(i)));
#	Line 199 | Line 208 | public class DelayQueueTest extends JSR1
208		}
209
210		/**
211	<	* remainingCapacity does not change when elementa added or removed,
211	>	* remainingCapacity does not change when elements added or removed,
212		* but size does
213		*/
214		public void testRemainingCapacity() {
#	Line 217 | Line 226 | public class DelayQueueTest extends JSR1
226		}
227
228		/**
220	–	* offer(null) throws NPE
221	–	*/
222	–	public void testOfferNull() {
223	–	try {
224	–	DelayQueue q = new DelayQueue();
225	–	q.offer(null);
226	–	shouldThrow();
227	–	} catch (NullPointerException success) {}
228	–	}
229	–
230	–	/**
231	–	* add(null) throws NPE
232	–	*/
233	–	public void testAddNull() {
234	–	try {
235	–	DelayQueue q = new DelayQueue();
236	–	q.add(null);
237	–	shouldThrow();
238	–	} catch (NullPointerException success) {}
239	–	}
240	–
241	–	/**
229		* offer non-null succeeds
230		*/
231		public void testOffer() {
#	Line 259 | Line 246 | public class DelayQueueTest extends JSR1
246		}
247
248		/**
262	–	* addAll(null) throws NPE
263	–	*/
264	–	public void testAddAll1() {
265	–	try {
266	–	DelayQueue q = new DelayQueue();
267	–	q.addAll(null);
268	–	shouldThrow();
269	–	} catch (NullPointerException success) {}
270	–	}
271	–
272	–
273	–	/**
249		* addAll(this) throws IAE
250		*/
251		public void testAddAllSelf() {
#	Line 282 | Line 257 | public class DelayQueueTest extends JSR1
257		}
258
259		/**
285	–	* addAll of a collection with null elements throws NPE
286	–	*/
287	–	public void testAddAll2() {
288	–	try {
289	–	DelayQueue q = new DelayQueue();
290	–	PDelay[] ints = new PDelay[SIZE];
291	–	q.addAll(Arrays.asList(ints));
292	–	shouldThrow();
293	–	} catch (NullPointerException success) {}
294	–	}
295	–	/**
260		* addAll of a collection with any null elements throws NPE after
261		* possibly adding some elements
262		*/
#	Line 323 | Line 287 | public class DelayQueueTest extends JSR1
287		}
288
289		/**
326	–	* put(null) throws NPE
327	–	*/
328	–	public void testPutNull() {
329	–	try {
330	–	DelayQueue q = new DelayQueue();
331	–	q.put(null);
332	–	shouldThrow();
333	–	} catch (NullPointerException success) {}
334	–	}
335	–
336	–	/**
290		* all elements successfully put are contained
291		*/
292	<	public void testPut() {
293	<	DelayQueue q = new DelayQueue();
294	<	for (int i = 0; i < SIZE; ++i) {
295	<	PDelay I = new PDelay(i);
296	<	q.put(I);
297	<	assertTrue(q.contains(I));
298	<	}
299	<	assertEquals(SIZE, q.size());
292	>	public void testPut() {
293	>	DelayQueue q = new DelayQueue();
294	>	for (int i = 0; i < SIZE; ++i) {
295	>	PDelay I = new PDelay(i);
296	>	q.put(I);
297	>	assertTrue(q.contains(I));
298	>	}
299	>	assertEquals(SIZE, q.size());
300		}
301
302		/**
#	Line 351 | Line 304 | public class DelayQueueTest extends JSR1
304		*/
305		public void testPutWithTake() throws InterruptedException {
306		final DelayQueue q = new DelayQueue();
307	<	Thread t = new Thread(new CheckedRunnable() {
307	>	Thread t = newStartedThread(new CheckedRunnable() {
308		public void realRun() {
309		q.put(new PDelay(0));
310		q.put(new PDelay(0));
#	Line 359 | Line 312 | public class DelayQueueTest extends JSR1
312		q.put(new PDelay(0));
313		}});
314
315	<	t.start();
316	<	Thread.sleep(SHORT_DELAY_MS);
364	<	q.take();
365	<	t.interrupt();
366	<	t.join();
315	>	awaitTermination(t);
316	>	assertEquals(4, q.size());
317		}
318
319		/**
#	Line 371 | Line 321 | public class DelayQueueTest extends JSR1
321		*/
322		public void testTimedOffer() throws InterruptedException {
323		final DelayQueue q = new DelayQueue();
324	<	Thread t = new Thread(new CheckedRunnable() {
324	>	Thread t = newStartedThread(new CheckedRunnable() {
325		public void realRun() throws InterruptedException {
326		q.put(new PDelay(0));
327		q.put(new PDelay(0));
328	<	threadAssertTrue(q.offer(new PDelay(0), SHORT_DELAY_MS, MILLISECONDS));
329	<	threadAssertTrue(q.offer(new PDelay(0), LONG_DELAY_MS, MILLISECONDS));
328	>	assertTrue(q.offer(new PDelay(0), SHORT_DELAY_MS, MILLISECONDS));
329	>	assertTrue(q.offer(new PDelay(0), LONG_DELAY_MS, MILLISECONDS));
330		}});
331
332	<	t.start();
383	<	Thread.sleep(SMALL_DELAY_MS);
384	<	t.interrupt();
385	<	t.join();
332	>	awaitTermination(t);
333		}
334
335		/**
#	Line 396 | Line 343 | public class DelayQueueTest extends JSR1
343		}
344
345		/**
399	–	* take blocks interruptibly when empty
400	–	*/
401	–	public void testTakeFromEmpty() throws InterruptedException {
402	–	final DelayQueue q = new DelayQueue();
403	–	Thread t = new ThreadShouldThrow(InterruptedException.class) {
404	–	public void realRun() throws InterruptedException {
405	–	q.take();
406	–	}};
407	–
408	–	t.start();
409	–	Thread.sleep(SHORT_DELAY_MS);
410	–	t.interrupt();
411	–	t.join();
412	–	}
413	–
414	–	/**
346		* Take removes existing elements until empty, then blocks interruptibly
347		*/
348		public void testBlockingTake() throws InterruptedException {
349	<	Thread t = new ThreadShouldThrow(InterruptedException.class) {
349	>	final DelayQueue q = populatedQueue(SIZE);
350	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
351	>	Thread t = newStartedThread(new CheckedRunnable() {
352		public void realRun() throws InterruptedException {
420	–	DelayQueue q = populatedQueue(SIZE);
353		for (int i = 0; i < SIZE; ++i) {
354	<	threadAssertEquals(new PDelay(i), ((PDelay)q.take()));
354	>	assertEquals(new PDelay(i), ((PDelay)q.take()));
355		}
424	–	q.take();
425	–	}};
356
357	<	t.start();
358	<	Thread.sleep(SHORT_DELAY_MS);
357	>	Thread.currentThread().interrupt();
358	>	try {
359	>	q.take();
360	>	shouldThrow();
361	>	} catch (InterruptedException success) {}
362	>	assertFalse(Thread.interrupted());
363	>
364	>	pleaseInterrupt.countDown();
365	>	try {
366	>	q.take();
367	>	shouldThrow();
368	>	} catch (InterruptedException success) {}
369	>	assertFalse(Thread.interrupted());
370	>	}});
371	>
372	>	await(pleaseInterrupt);
373	>	assertThreadStaysAlive(t);
374		t.interrupt();
375	<	t.join();
375	>	awaitTermination(t);
376		}
377
433	–
378		/**
379		* poll succeeds unless empty
380		*/
#	Line 443 | Line 387 | public class DelayQueueTest extends JSR1
387		}
388
389		/**
390	<	* timed pool with zero timeout succeeds when non-empty, else times out
390	>	* timed poll with zero timeout succeeds when non-empty, else times out
391		*/
392		public void testTimedPoll0() throws InterruptedException {
393		DelayQueue q = populatedQueue(SIZE);
#	Line 454 | Line 398 | public class DelayQueueTest extends JSR1
398		}
399
400		/**
401	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
401	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
402		*/
403		public void testTimedPoll() throws InterruptedException {
404		DelayQueue q = populatedQueue(SIZE);
405		for (int i = 0; i < SIZE; ++i) {
406	<	assertEquals(new PDelay(i), ((PDelay)q.poll(SHORT_DELAY_MS, MILLISECONDS)));
407	<	}
408	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
406	>	long startTime = System.nanoTime();
407	>	assertEquals(new PDelay(i), ((PDelay)q.poll(LONG_DELAY_MS, MILLISECONDS)));
408	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
409	>	}
410	>	long startTime = System.nanoTime();
411	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
412	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
413	>	checkEmpty(q);
414		}
415
416		/**
#	Line 469 | Line 418 | public class DelayQueueTest extends JSR1
418		* returning timeout status
419		*/
420		public void testInterruptedTimedPoll() throws InterruptedException {
421	<	Thread t = new Thread(new CheckedRunnable() {
421	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
422	>	Thread t = newStartedThread(new CheckedRunnable() {
423		public void realRun() throws InterruptedException {
424		DelayQueue q = populatedQueue(SIZE);
425		for (int i = 0; i < SIZE; ++i) {
426		assertEquals(new PDelay(i), ((PDelay)q.poll(SHORT_DELAY_MS, MILLISECONDS)));
427		}
428	+
429	+	Thread.currentThread().interrupt();
430		try {
431	<	q.poll(SMALL_DELAY_MS, MILLISECONDS);
431	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
432		shouldThrow();
433		} catch (InterruptedException success) {}
434	<	}});
483	<
484	<	t.start();
485	<	Thread.sleep(SHORT_DELAY_MS);
486	<	t.interrupt();
487	<	t.join();
488	<	}
434	>	assertFalse(Thread.interrupted());
435
436	<	/**
491	<	*  timed poll before a delayed offer fails; after offer succeeds;
492	<	*  on interruption throws
493	<	*/
494	<	public void testTimedPollWithOffer() throws InterruptedException {
495	<	final DelayQueue q = new DelayQueue();
496	<	final PDelay pdelay = new PDelay(0);
497	<	Thread t = new Thread(new CheckedRunnable() {
498	<	public void realRun() throws InterruptedException {
499	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
500	<	assertSame(pdelay, q.poll(LONG_DELAY_MS, MILLISECONDS));
436	>	pleaseInterrupt.countDown();
437		try {
438		q.poll(LONG_DELAY_MS, MILLISECONDS);
439		shouldThrow();
440		} catch (InterruptedException success) {}
441	+	assertFalse(Thread.interrupted());
442		}});
443
444	<	t.start();
445	<	Thread.sleep(SMALL_DELAY_MS);
509	<	assertTrue(q.offer(pdelay, SHORT_DELAY_MS, MILLISECONDS));
444	>	await(pleaseInterrupt);
445	>	assertThreadStaysAlive(t);
446		t.interrupt();
447	<	t.join();
447	>	awaitTermination(t);
448		}
449
514	–
450		/**
451		* peek returns next element, or null if empty
452		*/
#	Line 519 | Line 454 | public class DelayQueueTest extends JSR1
454		DelayQueue q = populatedQueue(SIZE);
455		for (int i = 0; i < SIZE; ++i) {
456		assertEquals(new PDelay(i), ((PDelay)q.peek()));
457	<	q.poll();
457	>	assertEquals(new PDelay(i), ((PDelay)q.poll()));
458		if (q.isEmpty())
459		assertNull(q.peek());
460		else
461	<	assertTrue(i != ((PDelay)q.peek()).intValue());
461	>	assertFalse(new PDelay(i).equals(q.peek()));
462		}
463		assertNull(q.peek());
464		}
#	Line 658 | Line 593 | public class DelayQueueTest extends JSR1
593		Object[] o = q.toArray();
594		Arrays.sort(o);
595		for (int i = 0; i < o.length; i++)
596	<	assertEquals(o[i], q.take());
596	>	assertSame(o[i], q.take());
597		}
598
599		/**
600		* toArray(a) contains all elements
601		*/
602	<	public void testToArray2() throws InterruptedException {
603	<	DelayQueue q = populatedQueue(SIZE);
602	>	public void testToArray2() {
603	>	DelayQueue<PDelay> q = populatedQueue(SIZE);
604		PDelay[] ints = new PDelay[SIZE];
605	<	ints = (PDelay[])q.toArray(ints);
605	>	PDelay[] array = q.toArray(ints);
606	>	assertSame(ints, array);
607		Arrays.sort(ints);
608		for (int i = 0; i < ints.length; i++)
609	<	assertEquals(ints[i], q.take());
609	>	assertSame(ints[i], q.remove());
610		}
611
676	–
612		/**
613	<	* toArray(null) throws NPE
679	<	*/
680	<	public void testToArray_BadArg() {
681	<	try {
682	<	DelayQueue q = populatedQueue(SIZE);
683	<	Object o[] = q.toArray(null);
684	<	shouldThrow();
685	<	} catch (NullPointerException success) {}
686	<	}
687	<
688	<	/**
689	<	* toArray with incompatible array type throws CCE
613	>	* toArray(incompatible array type) throws ArrayStoreException
614		*/
615		public void testToArray1_BadArg() {
616	+	DelayQueue q = populatedQueue(SIZE);
617		try {
618	<	DelayQueue q = populatedQueue(SIZE);
694	<	Object o[] = q.toArray(new String[10] );
618	>	q.toArray(new String[10]);
619		shouldThrow();
620		} catch (ArrayStoreException success) {}
621		}
#	Line 713 | Line 637 | public class DelayQueueTest extends JSR1
637		/**
638		* iterator.remove removes current element
639		*/
640	<	public void testIteratorRemove () {
640	>	public void testIteratorRemove() {
641		final DelayQueue q = new DelayQueue();
642		q.add(new PDelay(2));
643		q.add(new PDelay(1));
#	Line 727 | Line 651 | public class DelayQueueTest extends JSR1
651		assertFalse(it.hasNext());
652		}
653
730	–
654		/**
655		* toString contains toStrings of elements
656		*/
#	Line 735 | Line 658 | public class DelayQueueTest extends JSR1
658		DelayQueue q = populatedQueue(SIZE);
659		String s = q.toString();
660		for (int i = 0; i < SIZE; ++i) {
661	<	assertTrue(s.indexOf(String.valueOf(Integer.MIN_VALUE+i)) >= 0);
661	>	assertTrue(s.contains(String.valueOf(Integer.MIN_VALUE+i)));
662		}
663		}
664
665		/**
666	<	* offer transfers elements across Executor tasks
666	>	* timed poll transfers elements across Executor tasks
667		*/
668		public void testPollInExecutor() {
669		final DelayQueue q = new DelayQueue();
670	+	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
671		ExecutorService executor = Executors.newFixedThreadPool(2);
672		executor.execute(new CheckedRunnable() {
673		public void realRun() throws InterruptedException {
674	<	threadAssertNull(q.poll());
675	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
676	<	threadAssertTrue(q.isEmpty());
674	>	assertNull(q.poll());
675	>	threadsStarted.await();
676	>	assertTrue(null != q.poll(LONG_DELAY_MS, MILLISECONDS));
677	>	checkEmpty(q);
678		}});
679
680		executor.execute(new CheckedRunnable() {
681		public void realRun() throws InterruptedException {
682	<	Thread.sleep(SHORT_DELAY_MS);
682	>	threadsStarted.await();
683		q.put(new PDelay(1));
684		}});
685
686		joinPool(executor);
762	–
687		}
688
765	–
689		/**
690		* Delayed actions do not occur until their delay elapses
691		*/
692		public void testDelay() throws InterruptedException {
693	<	DelayQueue q = new DelayQueue();
694	<	NanoDelay[] elements = new NanoDelay[SIZE];
695	<	for (int i = 0; i < SIZE; ++i) {
773	<	elements[i] = new NanoDelay(1000000000L + 1000000L * (SIZE - i));
774	<	}
775	<	for (int i = 0; i < SIZE; ++i) {
776	<	q.add(elements[i]);
777	<	}
693	>	DelayQueue<NanoDelay> q = new DelayQueue<NanoDelay>();
694	>	for (int i = 0; i < SIZE; ++i)
695	>	q.add(new NanoDelay(1000000L * (SIZE - i)));
696
697		long last = 0;
698		for (int i = 0; i < SIZE; ++i) {
699	<	NanoDelay e = (NanoDelay)(q.take());
699	>	NanoDelay e = q.take();
700		long tt = e.getTriggerTime();
701	<	assertTrue(tt <= System.nanoTime());
701	>	assertTrue(System.nanoTime() - tt >= 0);
702		if (i != 0)
703		assertTrue(tt >= last);
704		last = tt;
705		}
706	+	assertTrue(q.isEmpty());
707		}
708
709		/**
#	Line 793 | Line 712 | public class DelayQueueTest extends JSR1
712		public void testPeekDelayed() {
713		DelayQueue q = new DelayQueue();
714		q.add(new NanoDelay(Long.MAX_VALUE));
715	<	assert(q.peek() != null);
715	>	assertNotNull(q.peek());
716		}
717
799	–
718		/**
719		* poll of a non-empty queue returns null if no expired elements.
720		*/
#	Line 812 | Line 730 | public class DelayQueueTest extends JSR1
730		public void testTimedPollDelayed() throws InterruptedException {
731		DelayQueue q = new DelayQueue();
732		q.add(new NanoDelay(LONG_DELAY_MS * 1000000L));
733	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
816	<	}
817	<
818	<	/**
819	<	* drainTo(null) throws NPE
820	<	*/
821	<	public void testDrainToNull() {
822	<	DelayQueue q = populatedQueue(SIZE);
823	<	try {
824	<	q.drainTo(null);
825	<	shouldThrow();
826	<	} catch (NullPointerException success) {}
827	<	}
828	<
829	<	/**
830	<	* drainTo(this) throws IAE
831	<	*/
832	<	public void testDrainToSelf() {
833	<	DelayQueue q = populatedQueue(SIZE);
834	<	try {
835	<	q.drainTo(q);
836	<	shouldThrow();
837	<	} catch (IllegalArgumentException success) {}
733	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
734		}
735
736		/**
#	Line 884 | Line 780 | public class DelayQueueTest extends JSR1
780		}
781
782		/**
783	<	* drainTo(null, n) throws NPE
888	<	*/
889	<	public void testDrainToNullN() {
890	<	DelayQueue q = populatedQueue(SIZE);
891	<	try {
892	<	q.drainTo(null, 0);
893	<	shouldThrow();
894	<	} catch (NullPointerException success) {}
895	<	}
896	<
897	<	/**
898	<	* drainTo(this, n) throws IAE
899	<	*/
900	<	public void testDrainToSelfN() {
901	<	DelayQueue q = populatedQueue(SIZE);
902	<	try {
903	<	q.drainTo(q, 0);
904	<	shouldThrow();
905	<	} catch (IllegalArgumentException success) {}
906	<	}
907	<
908	<	/**
909	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
783	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
784		*/
785		public void testDrainToN() {
786		for (int i = 0; i < SIZE + 2; ++i) {
787		DelayQueue q = populatedQueue(SIZE);
788		ArrayList l = new ArrayList();
789		q.drainTo(l, i);
790	<	int k = (i < SIZE)? i : SIZE;
790	>	int k = (i < SIZE) ? i : SIZE;
791		assertEquals(q.size(), SIZE-k);
792		assertEquals(l.size(), k);
793		}
794		}
795
922	–
796		}

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