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Comparing jsr166/src/test/tck/ScheduledExecutorSubclassTest.java (file contents):
Revision 1.17 by jsr166, Wed Nov 17 23:12:31 2010 UTC vs.
Revision 1.38 by jsr166, Sun Sep 27 20:17:39 2015 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		*/
6
7	–	import junit.framework.*;
8	–	import java.util.*;
9	–	import java.util.concurrent.*;
7		import static java.util.concurrent.TimeUnit.MILLISECONDS;
8	<	import java.util.concurrent.atomic.*;
8	>	import static java.util.concurrent.TimeUnit.SECONDS;
9	>
10	>	import java.util.ArrayList;
11	>	import java.util.HashSet;
12	>	import java.util.List;
13	>	import java.util.concurrent.BlockingQueue;
14	>	import java.util.concurrent.Callable;
15	>	import java.util.concurrent.CancellationException;
16	>	import java.util.concurrent.CountDownLatch;
17	>	import java.util.concurrent.Delayed;
18	>	import java.util.concurrent.ExecutionException;
19	>	import java.util.concurrent.Executors;
20	>	import java.util.concurrent.ExecutorService;
21	>	import java.util.concurrent.Future;
22	>	import java.util.concurrent.RejectedExecutionException;
23	>	import java.util.concurrent.RejectedExecutionHandler;
24	>	import java.util.concurrent.RunnableScheduledFuture;
25	>	import java.util.concurrent.ScheduledFuture;
26	>	import java.util.concurrent.ScheduledThreadPoolExecutor;
27	>	import java.util.concurrent.ThreadFactory;
28	>	import java.util.concurrent.ThreadPoolExecutor;
29	>	import java.util.concurrent.TimeoutException;
30	>	import java.util.concurrent.TimeUnit;
31	>	import java.util.concurrent.atomic.AtomicInteger;
32	>
33	>	import junit.framework.Test;
34	>	import junit.framework.TestSuite;
35
36		public class ScheduledExecutorSubclassTest extends JSR166TestCase {
37		public static void main(String[] args) {
38	<	junit.textui.TestRunner.run(suite());
38	>	main(suite(), args);
39		}
40		public static Test suite() {
41		return new TestSuite(ScheduledExecutorSubclassTest.class);
#	Line 36 | Line 59 | public class ScheduledExecutorSubclassTe
59		}
60		public boolean isCancelled() { return task.isCancelled(); }
61		public boolean isDone() { return task.isDone(); }
62	<	public V get() throws InterruptedException,  ExecutionException {
62	>	public V get() throws InterruptedException, ExecutionException {
63		V v = task.get();
64		assertTrue(ran);
65		return v;
66		}
67	<	public V get(long time, TimeUnit unit) throws InterruptedException,  ExecutionException, TimeoutException {
67	>	public V get(long time, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
68		V v = task.get(time, unit);
69		assertTrue(ran);
70		return v;
71		}
72		}
73
51	–
74		public class CustomExecutor extends ScheduledThreadPoolExecutor {
75
76		protected <V> RunnableScheduledFuture<V> decorateTask(Runnable r, RunnableScheduledFuture<V> task) {
#	Line 58 | Line 80 | public class ScheduledExecutorSubclassTe
80		protected <V> RunnableScheduledFuture<V> decorateTask(Callable<V> c, RunnableScheduledFuture<V> task) {
81		return new CustomTask<V>(task);
82		}
83	<	CustomExecutor(int corePoolSize) { super(corePoolSize);}
83	>	CustomExecutor(int corePoolSize) { super(corePoolSize); }
84		CustomExecutor(int corePoolSize, RejectedExecutionHandler handler) {
85		super(corePoolSize, handler);
86		}
#	Line 73 | Line 95 | public class ScheduledExecutorSubclassTe
95
96		}
97
76	–
98		/**
99		* execute successfully executes a runnable
100		*/
#	Line 92 | Line 113 | public class ScheduledExecutorSubclassTe
113		}
114		}
115
95	–
116		/**
117		* delayed schedule of callable successfully executes after delay
118		*/
119		public void testSchedule1() throws Exception {
120		CustomExecutor p = new CustomExecutor(1);
121	<	final long t0 = System.nanoTime();
102	<	final long timeoutNanos = SHORT_DELAY_MS * 1000L * 1000L;
121	>	final long startTime = System.nanoTime();
122		final CountDownLatch done = new CountDownLatch(1);
123		try {
124		Callable task = new CheckedCallable<Boolean>() {
125		public Boolean realCall() {
126		done.countDown();
127	<	assertTrue(System.nanoTime() - t0 >= timeoutNanos);
127	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
128		return Boolean.TRUE;
129		}};
130	<	Future f = p.schedule(task, SHORT_DELAY_MS, MILLISECONDS);
131	<	assertEquals(Boolean.TRUE, f.get());
132	<	assertTrue(System.nanoTime() - t0 >= timeoutNanos);
130	>	Future f = p.schedule(task, timeoutMillis(), MILLISECONDS);
131	>	assertSame(Boolean.TRUE, f.get());
132	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
133		assertTrue(done.await(0L, MILLISECONDS));
134		} finally {
135		joinPool(p);
#	Line 122 | Line 141 | public class ScheduledExecutorSubclassTe
141		*/
142		public void testSchedule3() throws Exception {
143		CustomExecutor p = new CustomExecutor(1);
144	<	final long t0 = System.nanoTime();
126	<	final long timeoutNanos = SHORT_DELAY_MS * 1000L * 1000L;
144	>	final long startTime = System.nanoTime();
145		final CountDownLatch done = new CountDownLatch(1);
146		try {
147		Runnable task = new CheckedRunnable() {
148		public void realRun() {
149		done.countDown();
150	<	assertTrue(System.nanoTime() - t0 >= timeoutNanos);
150	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
151		}};
152	<	Future f = p.schedule(task, SHORT_DELAY_MS, MILLISECONDS);
153	<	assertNull(f.get());
154	<	assertTrue(System.nanoTime() - t0 >= timeoutNanos);
155	<	assertTrue(done.await(0L, MILLISECONDS));
152	>	Future f = p.schedule(task, timeoutMillis(), MILLISECONDS);
153	>	await(done);
154	>	assertNull(f.get(LONG_DELAY_MS, MILLISECONDS));
155	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
156		} finally {
157		joinPool(p);
158		}
#	Line 145 | Line 163 | public class ScheduledExecutorSubclassTe
163		*/
164		public void testSchedule4() throws InterruptedException {
165		CustomExecutor p = new CustomExecutor(1);
166	<	final long t0 = System.nanoTime();
149	<	final long timeoutNanos = SHORT_DELAY_MS * 1000L * 1000L;
166	>	final long startTime = System.nanoTime();
167		final CountDownLatch done = new CountDownLatch(1);
168		try {
169		Runnable task = new CheckedRunnable() {
170		public void realRun() {
171		done.countDown();
172	<	assertTrue(System.nanoTime() - t0 >= timeoutNanos);
172	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
173		}};
174		ScheduledFuture f =
175	<	p.scheduleAtFixedRate(task, SHORT_DELAY_MS,
176	<	SHORT_DELAY_MS, MILLISECONDS);
177	<	assertTrue(done.await(SMALL_DELAY_MS, MILLISECONDS));
178	<	assertTrue(System.nanoTime() - t0 >= timeoutNanos);
175	>	p.scheduleAtFixedRate(task, timeoutMillis(),
176	>	LONG_DELAY_MS, MILLISECONDS);
177	>	await(done);
178	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
179		f.cancel(true);
180		} finally {
181		joinPool(p);
#	Line 170 | Line 187 | public class ScheduledExecutorSubclassTe
187		*/
188		public void testSchedule5() throws InterruptedException {
189		CustomExecutor p = new CustomExecutor(1);
190	<	final long t0 = System.nanoTime();
174	<	final long timeoutNanos = SHORT_DELAY_MS * 1000L * 1000L;
190	>	final long startTime = System.nanoTime();
191		final CountDownLatch done = new CountDownLatch(1);
192		try {
193		Runnable task = new CheckedRunnable() {
194		public void realRun() {
195		done.countDown();
196	<	assertTrue(System.nanoTime() - t0 >= timeoutNanos);
196	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
197		}};
198		ScheduledFuture f =
199	<	p.scheduleWithFixedDelay(task, SHORT_DELAY_MS,
200	<	SHORT_DELAY_MS, MILLISECONDS);
201	<	assertTrue(done.await(SMALL_DELAY_MS, MILLISECONDS));
202	<	assertTrue(System.nanoTime() - t0 >= timeoutNanos);
199	>	p.scheduleWithFixedDelay(task, timeoutMillis(),
200	>	LONG_DELAY_MS, MILLISECONDS);
201	>	await(done);
202	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
203		f.cancel(true);
204		} finally {
205		joinPool(p);
#	Line 200 | Line 216 | public class ScheduledExecutorSubclassTe
216		*/
217		public void testFixedRateSequence() throws InterruptedException {
218		CustomExecutor p = new CustomExecutor(1);
219	<	RunnableCounter counter = new RunnableCounter();
220	<	ScheduledFuture h =
221	<	p.scheduleAtFixedRate(counter, 0, 1, MILLISECONDS);
222	<	Thread.sleep(SMALL_DELAY_MS);
223	<	h.cancel(true);
224	<	int c = counter.count.get();
225	<	// By time scaling conventions, we must have at least
226	<	// an execution per SHORT delay, but no more than one SHORT more
227	<	assertTrue(c >= SMALL_DELAY_MS / SHORT_DELAY_MS);
228	<	assertTrue(c <= SMALL_DELAY_MS + SHORT_DELAY_MS);
229	<	joinPool(p);
219	>	try {
220	>	for (int delay = 1; delay <= LONG_DELAY_MS; delay *= 3) {
221	>	long startTime = System.nanoTime();
222	>	int cycles = 10;
223	>	final CountDownLatch done = new CountDownLatch(cycles);
224	>	Runnable task = new CheckedRunnable() {
225	>	public void realRun() { done.countDown(); }};
226	>	ScheduledFuture h =
227	>	p.scheduleAtFixedRate(task, 0, delay, MILLISECONDS);
228	>	done.await();
229	>	h.cancel(true);
230	>	double normalizedTime =
231	>	(double) millisElapsedSince(startTime) / delay;
232	>	if (normalizedTime >= cycles - 1 &&
233	>	normalizedTime <= cycles)
234	>	return;
235	>	}
236	>	throw new AssertionError("unexpected execution rate");
237	>	} finally {
238	>	joinPool(p);
239	>	}
240		}
241
242		/**
#	Line 218 | Line 244 | public class ScheduledExecutorSubclassTe
244		*/
245		public void testFixedDelaySequence() throws InterruptedException {
246		CustomExecutor p = new CustomExecutor(1);
247	<	RunnableCounter counter = new RunnableCounter();
248	<	ScheduledFuture h =
249	<	p.scheduleWithFixedDelay(counter, 0, 1, MILLISECONDS);
250	<	Thread.sleep(SMALL_DELAY_MS);
251	<	h.cancel(true);
252	<	int c = counter.count.get();
253	<	assertTrue(c >= SMALL_DELAY_MS / SHORT_DELAY_MS);
254	<	assertTrue(c <= SMALL_DELAY_MS + SHORT_DELAY_MS);
255	<	joinPool(p);
247	>	try {
248	>	for (int delay = 1; delay <= LONG_DELAY_MS; delay *= 3) {
249	>	long startTime = System.nanoTime();
250	>	int cycles = 10;
251	>	final CountDownLatch done = new CountDownLatch(cycles);
252	>	Runnable task = new CheckedRunnable() {
253	>	public void realRun() { done.countDown(); }};
254	>	ScheduledFuture h =
255	>	p.scheduleWithFixedDelay(task, 0, delay, MILLISECONDS);
256	>	done.await();
257	>	h.cancel(true);
258	>	double normalizedTime =
259	>	(double) millisElapsedSince(startTime) / delay;
260	>	if (normalizedTime >= cycles - 1 &&
261	>	normalizedTime <= cycles)
262	>	return;
263	>	}
264	>	throw new AssertionError("unexpected execution rate");
265	>	} finally {
266	>	joinPool(p);
267	>	}
268		}
269
232	–
270		/**
271		* execute(null) throws NPE
272		*/
#	Line 291 | Line 328 | public class ScheduledExecutorSubclassTe
328		/**
329		* schedule callable throws RejectedExecutionException if shutdown
330		*/
331	<	public void testSchedule3_RejectedExecutionException() {
332	<	CustomExecutor se = new CustomExecutor(1);
333	<	try {
334	<	se.shutdown();
335	<	se.schedule(new NoOpCallable(),
336	<	MEDIUM_DELAY_MS, MILLISECONDS);
337	<	shouldThrow();
338	<	} catch (RejectedExecutionException success) {
339	<	} catch (SecurityException ok) {
340	<	}
341	<	joinPool(se);
331	>	public void testSchedule3_RejectedExecutionException() {
332	>	CustomExecutor se = new CustomExecutor(1);
333	>	try {
334	>	se.shutdown();
335	>	se.schedule(new NoOpCallable(),
336	>	MEDIUM_DELAY_MS, MILLISECONDS);
337	>	shouldThrow();
338	>	} catch (RejectedExecutionException success) {
339	>	} catch (SecurityException ok) {
340	>	}
341	>	joinPool(se);
342		}
343
344		/**
#	Line 378 | Line 415 | public class ScheduledExecutorSubclassTe
415		threadProceed.await();
416		threadDone.countDown();
417		}});
418	<	assertTrue(threadStarted.await(SMALL_DELAY_MS, MILLISECONDS));
418	>	await(threadStarted);
419		assertEquals(0, p.getCompletedTaskCount());
420		threadProceed.countDown();
421		threadDone.await();
422	<	Thread.sleep(SHORT_DELAY_MS);
423	<	assertEquals(1, p.getCompletedTaskCount());
422	>	long startTime = System.nanoTime();
423	>	while (p.getCompletedTaskCount() != 1) {
424	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
425	>	fail("timed out");
426	>	Thread.yield();
427	>	}
428		} finally {
429		joinPool(p);
430		}
#	Line 510 | Line 551 | public class ScheduledExecutorSubclassTe
551		}
552
553		/**
554	<	* isShutDown is false before shutdown, true after
554	>	* isShutdown is false before shutdown, true after
555		*/
556		public void testIsShutdown() {
557		CustomExecutor p = new CustomExecutor(1);
#	Line 523 | Line 564 | public class ScheduledExecutorSubclassTe
564		assertTrue(p.isShutdown());
565		}
566
526	–
567		/**
568		* isTerminated is false before termination, true after
569		*/
#	Line 535 | Line 575 | public class ScheduledExecutorSubclassTe
575		try {
576		p.execute(new CheckedRunnable() {
577		public void realRun() throws InterruptedException {
538	–	threadStarted.countDown();
578		assertFalse(p.isTerminated());
579	+	threadStarted.countDown();
580		done.await();
581		}});
582		assertTrue(threadStarted.await(SMALL_DELAY_MS, MILLISECONDS));
583	+	assertFalse(p.isTerminating());
584		done.countDown();
585		} finally {
586		try { p.shutdown(); } catch (SecurityException ok) { return; }
#	Line 641 | Line 682 | public class ScheduledExecutorSubclassTe
682		public void testPurge() throws InterruptedException {
683		CustomExecutor p = new CustomExecutor(1);
684		ScheduledFuture[] tasks = new ScheduledFuture[5];
685	<	for (int i = 0; i < tasks.length; i++) {
686	<	tasks[i] = p.schedule(new SmallPossiblyInterruptedRunnable(), SHORT_DELAY_MS, MILLISECONDS);
687	<	}
685	>	for (int i = 0; i < tasks.length; i++)
686	>	tasks[i] = p.schedule(new SmallPossiblyInterruptedRunnable(),
687	>	LONG_DELAY_MS, MILLISECONDS);
688		try {
689		int max = tasks.length;
690		if (tasks[4].cancel(true)) --max;
691		if (tasks[3].cancel(true)) --max;
692		// There must eventually be an interference-free point at
693		// which purge will not fail. (At worst, when queue is empty.)
694	<	int k;
695	<	for (k = 0; k < SMALL_DELAY_MS; ++k) {
694	>	long startTime = System.nanoTime();
695	>	do {
696		p.purge();
697		long count = p.getTaskCount();
698	<	if (count >= 0 && count <= max)
699	<	break;
700	<	Thread.sleep(1);
701	<	}
661	<	assertTrue(k < SMALL_DELAY_MS);
698	>	if (count == max)
699	>	return;
700	>	} while (millisElapsedSince(startTime) < MEDIUM_DELAY_MS);
701	>	fail("Purge failed to remove cancelled tasks");
702		} finally {
703		for (ScheduledFuture task : tasks)
704		task.cancel(true);
#	Line 667 | Line 707 | public class ScheduledExecutorSubclassTe
707		}
708
709		/**
710	<	* shutDownNow returns a list containing tasks that were not run
710	>	* shutdownNow returns a list containing tasks that were not run,
711	>	* and those tasks are drained from the queue
712		*/
713	<	public void testShutDownNow() {
713	>	public void testShutdownNow_delayedTasks() throws InterruptedException {
714		CustomExecutor p = new CustomExecutor(1);
715	<	for (int i = 0; i < 5; i++)
716	<	p.schedule(new SmallPossiblyInterruptedRunnable(), SHORT_DELAY_MS, MILLISECONDS);
717	<	List l;
715	>	List<ScheduledFuture> tasks = new ArrayList<>();
716	>	for (int i = 0; i < 3; i++) {
717	>	Runnable r = new NoOpRunnable();
718	>	tasks.add(p.schedule(r, 9, SECONDS));
719	>	tasks.add(p.scheduleAtFixedRate(r, 9, 9, SECONDS));
720	>	tasks.add(p.scheduleWithFixedDelay(r, 9, 9, SECONDS));
721	>	}
722	>	assertEquals(new HashSet(tasks), new HashSet(p.getQueue()));
723	>	final List<Runnable> queuedTasks;
724		try {
725	<	l = p.shutdownNow();
725	>	queuedTasks = p.shutdownNow();
726		} catch (SecurityException ok) {
727	<	return;
727	>	return; // Allowed in case test doesn't have privs
728		}
729		assertTrue(p.isShutdown());
730	<	assertTrue(l.size() > 0 && l.size() <= 5);
731	<	joinPool(p);
730	>	assertTrue(p.getQueue().isEmpty());
731	>	assertEquals(new HashSet(tasks), new HashSet(queuedTasks));
732	>	assertEquals(tasks.size(), queuedTasks.size());
733	>	for (ScheduledFuture task : tasks) {
734	>	assertFalse(((CustomTask)task).ran);
735	>	assertFalse(task.isDone());
736	>	assertFalse(task.isCancelled());
737	>	}
738	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
739	>	assertTrue(p.isTerminated());
740		}
741
742		/**
743		* In default setting, shutdown cancels periodic but not delayed
744		* tasks at shutdown
745		*/
746	<	public void testShutDown1() throws InterruptedException {
746	>	public void testShutdown1() throws InterruptedException {
747		CustomExecutor p = new CustomExecutor(1);
748		assertTrue(p.getExecuteExistingDelayedTasksAfterShutdownPolicy());
749		assertFalse(p.getContinueExistingPeriodicTasksAfterShutdownPolicy());
#	Line 713 | Line 768 | public class ScheduledExecutorSubclassTe
768		}
769		}
770
716	–
771		/**
772		* If setExecuteExistingDelayedTasksAfterShutdownPolicy is false,
773		* delayed tasks are cancelled at shutdown
774		*/
775	<	public void testShutDown2() throws InterruptedException {
775	>	public void testShutdown2() throws InterruptedException {
776		CustomExecutor p = new CustomExecutor(1);
777		p.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
778		assertFalse(p.getExecuteExistingDelayedTasksAfterShutdownPolicy());
#	Line 740 | Line 794 | public class ScheduledExecutorSubclassTe
794		}
795		}
796
743	–
797		/**
798		* If setContinueExistingPeriodicTasksAfterShutdownPolicy is set false,
799		* periodic tasks are cancelled at shutdown
800		*/
801	<	public void testShutDown3() throws InterruptedException {
801	>	public void testShutdown3() throws InterruptedException {
802		CustomExecutor p = new CustomExecutor(1);
803		assertTrue(p.getExecuteExistingDelayedTasksAfterShutdownPolicy());
804		assertFalse(p.getContinueExistingPeriodicTasksAfterShutdownPolicy());
805		p.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
806		assertTrue(p.getExecuteExistingDelayedTasksAfterShutdownPolicy());
807		assertFalse(p.getContinueExistingPeriodicTasksAfterShutdownPolicy());
808	+	long initialDelay = LONG_DELAY_MS;
809		ScheduledFuture task =
810	<	p.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, MILLISECONDS);
810	>	p.scheduleAtFixedRate(new NoOpRunnable(), initialDelay,
811	>	5, MILLISECONDS);
812		try { p.shutdown(); } catch (SecurityException ok) { return; }
813		assertTrue(p.isShutdown());
759	–	BlockingQueue q = p.getQueue();
814		assertTrue(p.getQueue().isEmpty());
815		assertTrue(task.isDone());
816		assertTrue(task.isCancelled());
817	<	assertTrue(p.awaitTermination(SMALL_DELAY_MS, MILLISECONDS));
764	<	assertTrue(p.isTerminated());
817	>	joinPool(p);
818		}
819
820		/**
821		* if setContinueExistingPeriodicTasksAfterShutdownPolicy is true,
822		* periodic tasks are not cancelled at shutdown
823		*/
824	<	public void testShutDown4() throws InterruptedException {
824	>	public void testShutdown4() throws InterruptedException {
825		CustomExecutor p = new CustomExecutor(1);
826		final CountDownLatch counter = new CountDownLatch(2);
827		try {
#	Line 1204 | Line 1257 | public class ScheduledExecutorSubclassTe
1257		public void testTimedInvokeAll6() throws Exception {
1258		ExecutorService e = new CustomExecutor(2);
1259		try {
1260	<	List<Callable<String>> l = new ArrayList<Callable<String>>();
1261	<	l.add(new StringTask());
1262	<	l.add(Executors.callable(new MediumPossiblyInterruptedRunnable(), TEST_STRING));
1263	<	l.add(new StringTask());
1264	<	List<Future<String>> futures =
1265	<	e.invokeAll(l, SHORT_DELAY_MS, MILLISECONDS);
1266	<	assertEquals(3, futures.size());
1267	<	Iterator<Future<String>> it = futures.iterator();
1268	<	Future<String> f1 = it.next();
1269	<	Future<String> f2 = it.next();
1270	<	Future<String> f3 = it.next();
1271	<	assertTrue(f1.isDone());
1272	<	assertTrue(f2.isDone());
1273	<	assertTrue(f3.isDone());
1274	<	assertFalse(f1.isCancelled());
1275	<	assertTrue(f2.isCancelled());
1260	>	for (long timeout = timeoutMillis();;) {
1261	>	List<Callable<String>> tasks = new ArrayList<>();
1262	>	tasks.add(new StringTask("0"));
1263	>	tasks.add(Executors.callable(new LongPossiblyInterruptedRunnable(), TEST_STRING));
1264	>	tasks.add(new StringTask("2"));
1265	>	long startTime = System.nanoTime();
1266	>	List<Future<String>> futures =
1267	>	e.invokeAll(tasks, timeout, MILLISECONDS);
1268	>	assertEquals(tasks.size(), futures.size());
1269	>	assertTrue(millisElapsedSince(startTime) >= timeout);
1270	>	for (Future future : futures)
1271	>	assertTrue(future.isDone());
1272	>	assertTrue(futures.get(1).isCancelled());
1273	>	try {
1274	>	assertEquals("0", futures.get(0).get());
1275	>	assertEquals("2", futures.get(2).get());
1276	>	break;
1277	>	} catch (CancellationException retryWithLongerTimeout) {
1278	>	timeout *= 2;
1279	>	if (timeout >= LONG_DELAY_MS / 2)
1280	>	fail("expected exactly one task to be cancelled");
1281	>	}
1282	>	}
1283		} finally {
1284		joinPool(e);
1285		}

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