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

Comparing jsr166/src/test/tck/ScheduledExecutorTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 23:50:09 2003 UTC vs.
Revision 1.80 by jsr166, Mon Feb 22 23:16:06 2016 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
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/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.*;
11	<	import java.util.concurrent.*;
12	<
13	<	public class ScheduledExecutorTest extends TestCase{
14	<
15	<	boolean flag = false;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
11	>	import static java.util.concurrent.TimeUnit.SECONDS;
12	>
13	>	import java.util.ArrayList;
14	>	import java.util.HashSet;
15	>	import java.util.List;
16	>	import java.util.concurrent.BlockingQueue;
17	>	import java.util.concurrent.Callable;
18	>	import java.util.concurrent.CancellationException;
19	>	import java.util.concurrent.CountDownLatch;
20	>	import java.util.concurrent.ExecutionException;
21	>	import java.util.concurrent.Executors;
22	>	import java.util.concurrent.ExecutorService;
23	>	import java.util.concurrent.Future;
24	>	import java.util.concurrent.RejectedExecutionException;
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.atomic.AtomicBoolean;
30	>	import java.util.concurrent.atomic.AtomicInteger;
31	>	import java.util.concurrent.atomic.AtomicLong;
32
33	+	import junit.framework.Test;
34	+	import junit.framework.TestSuite;
35	+
36	+	public class ScheduledExecutorTest extends JSR166TestCase {
37		public static void main(String[] args) {
38	<	junit.textui.TestRunner.run (suite());
38	>	main(suite(), args);
39		}
19	–
20	–
40		public static Test suite() {
41	<	return new TestSuite(ScheduledExecutorTest.class);
41	>	return new TestSuite(ScheduledExecutorTest.class);
42		}
43
44	<	private static long SHORT_DELAY_MS = 100;
45	<	private static long MEDIUM_DELAY_MS = 1000;
46	<	private static long LONG_DELAY_MS = 10000;
47	<
48	<	static class MyRunnable implements Runnable {
49	<	volatile boolean waiting = true;
50	<	volatile boolean done = false;
51	<	public void run(){
52	<	try{
53	<	Thread.sleep(SHORT_DELAY_MS);
54	<	waiting = false;
55	<	done = true;
56	<	} catch(Exception e){
44	>	/**
45	>	* execute successfully executes a runnable
46	>	*/
47	>	public void testExecute() throws InterruptedException {
48	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
49	>	try (PoolCleaner cleaner = cleaner(p)) {
50	>	final CountDownLatch done = new CountDownLatch(1);
51	>	final Runnable task = new CheckedRunnable() {
52	>	public void realRun() { done.countDown(); }};
53	>	p.execute(task);
54	>	assertTrue(done.await(LONG_DELAY_MS, MILLISECONDS));
55	>	}
56	>	}
57	>
58	>	/**
59	>	* delayed schedule of callable successfully executes after delay
60	>	*/
61	>	public void testSchedule1() throws Exception {
62	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
63	>	try (PoolCleaner cleaner = cleaner(p)) {
64	>	final long startTime = System.nanoTime();
65	>	final CountDownLatch done = new CountDownLatch(1);
66	>	Callable task = new CheckedCallable<Boolean>() {
67	>	public Boolean realCall() {
68	>	done.countDown();
69	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
70	>	return Boolean.TRUE;
71	>	}};
72	>	Future f = p.schedule(task, timeoutMillis(), MILLISECONDS);
73	>	assertSame(Boolean.TRUE, f.get());
74	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
75	>	assertTrue(done.await(0L, MILLISECONDS));
76	>	}
77	>	}
78	>
79	>	/**
80	>	* delayed schedule of runnable successfully executes after delay
81	>	*/
82	>	public void testSchedule3() throws Exception {
83	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
84	>	try (PoolCleaner cleaner = cleaner(p)) {
85	>	final long startTime = System.nanoTime();
86	>	final CountDownLatch done = new CountDownLatch(1);
87	>	Runnable task = new CheckedRunnable() {
88	>	public void realRun() {
89	>	done.countDown();
90	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
91	>	}};
92	>	Future f = p.schedule(task, timeoutMillis(), MILLISECONDS);
93	>	await(done);
94	>	assertNull(f.get(LONG_DELAY_MS, MILLISECONDS));
95	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
96	>	}
97	>	}
98	>
99	>	/**
100	>	* scheduleAtFixedRate executes runnable after given initial delay
101	>	*/
102	>	public void testSchedule4() throws Exception {
103	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
104	>	try (PoolCleaner cleaner = cleaner(p)) {
105	>	final long startTime = System.nanoTime();
106	>	final CountDownLatch done = new CountDownLatch(1);
107	>	Runnable task = new CheckedRunnable() {
108	>	public void realRun() {
109	>	done.countDown();
110	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
111	>	}};
112	>	ScheduledFuture f =
113	>	p.scheduleAtFixedRate(task, timeoutMillis(),
114	>	LONG_DELAY_MS, MILLISECONDS);
115	>	await(done);
116	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
117	>	f.cancel(true);
118	>	}
119	>	}
120	>
121	>	/**
122	>	* scheduleWithFixedDelay executes runnable after given initial delay
123	>	*/
124	>	public void testSchedule5() throws Exception {
125	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
126	>	try (PoolCleaner cleaner = cleaner(p)) {
127	>	final long startTime = System.nanoTime();
128	>	final CountDownLatch done = new CountDownLatch(1);
129	>	Runnable task = new CheckedRunnable() {
130	>	public void realRun() {
131	>	done.countDown();
132	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
133	>	}};
134	>	ScheduledFuture f =
135	>	p.scheduleWithFixedDelay(task, timeoutMillis(),
136	>	LONG_DELAY_MS, MILLISECONDS);
137	>	await(done);
138	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
139	>	f.cancel(true);
140	>	}
141	>	}
142	>
143	>	static class RunnableCounter implements Runnable {
144	>	AtomicInteger count = new AtomicInteger(0);
145	>	public void run() { count.getAndIncrement(); }
146	>	}
147	>
148	>	/**
149	>	* scheduleAtFixedRate executes series of tasks at given rate.
150	>	* Eventually, it must hold that:
151	>	*   cycles - 1 <= elapsedMillis/delay < cycles
152	>	*/
153	>	public void testFixedRateSequence() throws InterruptedException {
154	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
155	>	try (PoolCleaner cleaner = cleaner(p)) {
156	>	for (int delay = 1; delay <= LONG_DELAY_MS; delay *= 3) {
157	>	final long startTime = System.nanoTime();
158	>	final int cycles = 8;
159	>	final CountDownLatch done = new CountDownLatch(cycles);
160	>	final Runnable task = new CheckedRunnable() {
161	>	public void realRun() { done.countDown(); }};
162	>	final ScheduledFuture periodicTask =
163	>	p.scheduleAtFixedRate(task, 0, delay, MILLISECONDS);
164	>	final int totalDelayMillis = (cycles - 1) * delay;
165	>	await(done, totalDelayMillis + LONG_DELAY_MS);
166	>	periodicTask.cancel(true);
167	>	final long elapsedMillis = millisElapsedSince(startTime);
168	>	assertTrue(elapsedMillis >= totalDelayMillis);
169	>	if (elapsedMillis <= cycles * delay)
170	>	return;
171	>	// else retry with longer delay
172		}
173	+	fail("unexpected execution rate");
174		}
175		}
176
177	<	static class MyCallable implements Callable {
178	<	volatile boolean waiting = true;
179	<	volatile boolean done = false;
180	<	public Object call(){
181	<	try{
182	<	Thread.sleep(SHORT_DELAY_MS);
183	<	waiting = false;
184	<	done = true;
185	<	}catch(Exception e){}
186	<	return Boolean.TRUE;
177	>	/**
178	>	* scheduleWithFixedDelay executes series of tasks with given period.
179	>	* Eventually, it must hold that each task starts at least delay and at
180	>	* most 2 * delay after the termination of the previous task.
181	>	*/
182	>	public void testFixedDelaySequence() throws InterruptedException {
183	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
184	>	try (PoolCleaner cleaner = cleaner(p)) {
185	>	for (int delay = 1; delay <= LONG_DELAY_MS; delay *= 3) {
186	>	final long startTime = System.nanoTime();
187	>	final AtomicLong previous = new AtomicLong(startTime);
188	>	final AtomicBoolean tryLongerDelay = new AtomicBoolean(false);
189	>	final int cycles = 8;
190	>	final CountDownLatch done = new CountDownLatch(cycles);
191	>	final int d = delay;
192	>	final Runnable task = new CheckedRunnable() {
193	>	public void realRun() {
194	>	long now = System.nanoTime();
195	>	long elapsedMillis
196	>	= NANOSECONDS.toMillis(now - previous.get());
197	>	if (done.getCount() == cycles) { // first execution
198	>	if (elapsedMillis >= d)
199	>	tryLongerDelay.set(true);
200	>	} else {
201	>	assertTrue(elapsedMillis >= d);
202	>	if (elapsedMillis >= 2 * d)
203	>	tryLongerDelay.set(true);
204	>	}
205	>	previous.set(now);
206	>	done.countDown();
207	>	}};
208	>	final ScheduledFuture periodicTask =
209	>	p.scheduleWithFixedDelay(task, 0, delay, MILLISECONDS);
210	>	final int totalDelayMillis = (cycles - 1) * delay;
211	>	await(done, totalDelayMillis + cycles * LONG_DELAY_MS);
212	>	periodicTask.cancel(true);
213	>	final long elapsedMillis = millisElapsedSince(startTime);
214	>	assertTrue(elapsedMillis >= totalDelayMillis);
215	>	if (!tryLongerDelay.get())
216	>	return;
217	>	// else retry with longer delay
218	>	}
219	>	fail("unexpected execution rate");
220		}
221		}
222
223	<	public Runnable newRunnable(){
224	<	return new Runnable(){
225	<	public void run(){
226	<	try{Thread.sleep(SHORT_DELAY_MS);
227	<	} catch(Exception e){
228	<	}
229	<	}
230	<	};
223	>	/**
224	>	* execute(null) throws NPE
225	>	*/
226	>	public void testExecuteNull() throws InterruptedException {
227	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
228	>	try (PoolCleaner cleaner = cleaner(p)) {
229	>	try {
230	>	p.execute(null);
231	>	shouldThrow();
232	>	} catch (NullPointerException success) {}
233	>	}
234		}
235
236	<	public Runnable newNoopRunnable() {
237	<	return new Runnable(){
238	<	public void run(){
239	<	}
240	<	};
236	>	/**
237	>	* schedule(null) throws NPE
238	>	*/
239	>	public void testScheduleNull() throws InterruptedException {
240	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
241	>	try (PoolCleaner cleaner = cleaner(p)) {
242	>	try {
243	>	TrackedCallable callable = null;
244	>	Future f = p.schedule(callable, SHORT_DELAY_MS, MILLISECONDS);
245	>	shouldThrow();
246	>	} catch (NullPointerException success) {}
247	>	}
248		}
249
250		/**
251	<	*  Test to verify execute successfully runs the given Runnable
251	>	* execute throws RejectedExecutionException if shutdown
252		*/
253	<	public void testExecute(){
254	<	try{
255	<	MyRunnable runnable =new MyRunnable();
256	<	ScheduledExecutor one = new ScheduledExecutor(1);
257	<	one.execute(runnable);
258	<	Thread.sleep(SHORT_DELAY_MS/2);
259	<	assertTrue(runnable.waiting);
260	<	one.shutdown();
261	<	try{
262	<	Thread.sleep(MEDIUM_DELAY_MS);
85	<	} catch(InterruptedException e){
86	<	fail("unexpected exception");
87	<	}
88	<	assertFalse(runnable.waiting);
89	<	assertTrue(runnable.done);
90	<	one.shutdown();
253	>	public void testSchedule1_RejectedExecutionException() throws InterruptedException {
254	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
255	>	try (PoolCleaner cleaner = cleaner(p)) {
256	>	try {
257	>	p.shutdown();
258	>	p.schedule(new NoOpRunnable(),
259	>	MEDIUM_DELAY_MS, MILLISECONDS);
260	>	shouldThrow();
261	>	} catch (RejectedExecutionException success) {
262	>	} catch (SecurityException ok) {}
263		}
264	<	catch(Exception e){
265	<	fail("unexpected exception");
264	>	}
265	>
266	>	/**
267	>	* schedule throws RejectedExecutionException if shutdown
268	>	*/
269	>	public void testSchedule2_RejectedExecutionException() throws InterruptedException {
270	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
271	>	try (PoolCleaner cleaner = cleaner(p)) {
272	>	try {
273	>	p.shutdown();
274	>	p.schedule(new NoOpCallable(),
275	>	MEDIUM_DELAY_MS, MILLISECONDS);
276	>	shouldThrow();
277	>	} catch (RejectedExecutionException success) {
278	>	} catch (SecurityException ok) {}
279		}
280		}
281
282		/**
283	<	*  Test to verify schedule successfully runs the given Callable.
99	<	*  The waiting flag shows that the Callable is not started until
100	<	*  immediately.
283	>	* schedule callable throws RejectedExecutionException if shutdown
284		*/
285	<	public void testSchedule1(){
286	<	try{
287	<	MyCallable callable = new MyCallable();
288	<	ScheduledExecutor one = new ScheduledExecutor(1);
289	<	Future f = one.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
290	<	assertTrue(callable.waiting);
291	<	Thread.sleep(MEDIUM_DELAY_MS);
292	<	assertTrue(callable.done);
293	<	assertEquals(Boolean.TRUE, f.get());
294	<	one.shutdown();
112	<	}catch(RejectedExecutionException e){}
113	<	catch(Exception e){
114	<	fail("unexpected exception");
285	>	public void testSchedule3_RejectedExecutionException() throws InterruptedException {
286	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
287	>	try (PoolCleaner cleaner = cleaner(p)) {
288	>	try {
289	>	p.shutdown();
290	>	p.schedule(new NoOpCallable(),
291	>	MEDIUM_DELAY_MS, MILLISECONDS);
292	>	shouldThrow();
293	>	} catch (RejectedExecutionException success) {
294	>	} catch (SecurityException ok) {}
295		}
296		}
297
298		/**
299	<	*  Another version of schedule, only using Runnable instead of Callable
299	>	* scheduleAtFixedRate throws RejectedExecutionException if shutdown
300		*/
301	<	public void testSchedule3(){
302	<	try{
303	<	MyRunnable runnable = new MyRunnable();
304	<	ScheduledExecutor one = new ScheduledExecutor(1);
305	<	one.schedule(runnable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
306	<	Thread.sleep(SHORT_DELAY_MS/2);
307	<	assertTrue(runnable.waiting);
308	<	Thread.sleep(MEDIUM_DELAY_MS);
309	<	assertTrue(runnable.done);
310	<	one.shutdown();
131	<	} catch(Exception e){
132	<	fail("unexpected exception");
301	>	public void testScheduleAtFixedRate1_RejectedExecutionException() throws InterruptedException {
302	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
303	>	try (PoolCleaner cleaner = cleaner(p)) {
304	>	try {
305	>	p.shutdown();
306	>	p.scheduleAtFixedRate(new NoOpRunnable(),
307	>	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, MILLISECONDS);
308	>	shouldThrow();
309	>	} catch (RejectedExecutionException success) {
310	>	} catch (SecurityException ok) {}
311		}
312		}
313	<
313	>
314		/**
315	<	*  The final version of schedule, using both long, TimeUnit and Runnable
315	>	* scheduleWithFixedDelay throws RejectedExecutionException if shutdown
316		*/
317	<	public void testSchedule4(){
318	<	try{
319	<	MyRunnable runnable = new MyRunnable();
320	<	ScheduledExecutor one = new ScheduledExecutor(1);
321	<	one.schedule(runnable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
322	<	//      Thread.sleep(505);
323	<	assertTrue(runnable.waiting);
324	<	Thread.sleep(MEDIUM_DELAY_MS);
325	<	assertTrue(runnable.done);
326	<	one.shutdown();
149	<	} catch(Exception e){
150	<	fail("unexpected exception");
317	>	public void testScheduleWithFixedDelay1_RejectedExecutionException() throws InterruptedException {
318	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
319	>	try (PoolCleaner cleaner = cleaner(p)) {
320	>	try {
321	>	p.shutdown();
322	>	p.scheduleWithFixedDelay(new NoOpRunnable(),
323	>	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, MILLISECONDS);
324	>	shouldThrow();
325	>	} catch (RejectedExecutionException success) {
326	>	} catch (SecurityException ok) {}
327		}
328		}
153	–
154	–
155	–	// exception tests
329
330		/**
331	<	*  Test to verify schedule(Runnable, long) throws RejectedExecutionException
332	<	*  This occurs on an attempt to schedule a task on a shutdown executor
331	>	* getActiveCount increases but doesn't overestimate, when a
332	>	* thread becomes active
333		*/
334	<	public void testSchedule1_RejectedExecutionException(){
335	<	try{
336	<	ScheduledExecutor se = new ScheduledExecutor(1);
337	<	se.shutdown();
338	<	se.schedule(new Runnable(){
339	<	public void run(){}
340	<	}, 10000, TimeUnit.MILLISECONDS);
341	<	fail("shoud throw");
342	<	}catch(RejectedExecutionException e){}
334	>	public void testGetActiveCount() throws InterruptedException {
335	>	final CountDownLatch done = new CountDownLatch(1);
336	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(2);
337	>	try (PoolCleaner cleaner = cleaner(p, done)) {
338	>	final CountDownLatch threadStarted = new CountDownLatch(1);
339	>	assertEquals(0, p.getActiveCount());
340	>	p.execute(new CheckedRunnable() {
341	>	public void realRun() throws InterruptedException {
342	>	threadStarted.countDown();
343	>	assertEquals(1, p.getActiveCount());
344	>	await(done);
345	>	}});
346	>	await(threadStarted);
347	>	assertEquals(1, p.getActiveCount());
348	>	}
349		}
350
351		/**
352	<	*  Test to verify schedule(Callable, long, TimeUnit) throws RejectedExecutionException
353	<	*  This occurs on an attempt to schedule a task on a shutdown executor
352	>	* getCompletedTaskCount increases, but doesn't overestimate,
353	>	* when tasks complete
354		*/
355	<	public void testSchedule2_RejectedExecutionException(){
356	<	try{
357	<	ScheduledExecutor se = new ScheduledExecutor(1);
358	<	se.shutdown();
359	<	se.schedule(new Callable(){
360	<	public Object call(){
361	<	return Boolean.TRUE;
362	<	}
363	<	}, (long)100, TimeUnit.SECONDS);
364	<	fail("should throw");
365	<	}catch(RejectedExecutionException e){}
355	>	public void testGetCompletedTaskCount() throws InterruptedException {
356	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(2);
357	>	try (PoolCleaner cleaner = cleaner(p)) {
358	>	final CountDownLatch threadStarted = new CountDownLatch(1);
359	>	final CountDownLatch threadProceed = new CountDownLatch(1);
360	>	final CountDownLatch threadDone = new CountDownLatch(1);
361	>	assertEquals(0, p.getCompletedTaskCount());
362	>	p.execute(new CheckedRunnable() {
363	>	public void realRun() throws InterruptedException {
364	>	threadStarted.countDown();
365	>	assertEquals(0, p.getCompletedTaskCount());
366	>	threadProceed.await();
367	>	threadDone.countDown();
368	>	}});
369	>	await(threadStarted);
370	>	assertEquals(0, p.getCompletedTaskCount());
371	>	threadProceed.countDown();
372	>	threadDone.await();
373	>	long startTime = System.nanoTime();
374	>	while (p.getCompletedTaskCount() != 1) {
375	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
376	>	fail("timed out");
377	>	Thread.yield();
378	>	}
379	>	}
380		}
381
382		/**
383	<	*  Test to verify schedule(Callable, long) throws RejectedExecutionException
191	<	*  This occurs on an attempt to schedule a task on a shutdown executor
383	>	* getCorePoolSize returns size given in constructor if not otherwise set
384		*/
385	<	public void testSchedule3_RejectedExecutionException(){
386	<	try{
387	<	ScheduledExecutor se = new ScheduledExecutor(1);
388	<	se.shutdown();
389	<	se.schedule(new Callable(){
390	<	public Object call(){
391	<	return Boolean.TRUE;
392	<	}
393	<	},  10000, TimeUnit.MILLISECONDS);
394	<	fail("should throw");
395	<	}catch(RejectedExecutionException e){}
385	>	public void testGetCorePoolSize() throws InterruptedException {
386	>	ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
387	>	try (PoolCleaner cleaner = cleaner(p)) {
388	>	assertEquals(1, p.getCorePoolSize());
389	>	}
390	>	}
391	>
392	>	/**
393	>	* getLargestPoolSize increases, but doesn't overestimate, when
394	>	* multiple threads active
395	>	*/
396	>	public void testGetLargestPoolSize() throws InterruptedException {
397	>	final int THREADS = 3;
398	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(THREADS);
399	>	final CountDownLatch threadsStarted = new CountDownLatch(THREADS);
400	>	final CountDownLatch done = new CountDownLatch(1);
401	>	try (PoolCleaner cleaner = cleaner(p, done)) {
402	>	assertEquals(0, p.getLargestPoolSize());
403	>	for (int i = 0; i < THREADS; i++)
404	>	p.execute(new CheckedRunnable() {
405	>	public void realRun() throws InterruptedException {
406	>	threadsStarted.countDown();
407	>	await(done);
408	>	assertEquals(THREADS, p.getLargestPoolSize());
409	>	}});
410	>	await(threadsStarted);
411	>	assertEquals(THREADS, p.getLargestPoolSize());
412	>	}
413	>	assertEquals(THREADS, p.getLargestPoolSize());
414	>	}
415	>
416	>	/**
417	>	* getPoolSize increases, but doesn't overestimate, when threads
418	>	* become active
419	>	*/
420	>	public void testGetPoolSize() throws InterruptedException {
421	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
422	>	final CountDownLatch threadStarted = new CountDownLatch(1);
423	>	final CountDownLatch done = new CountDownLatch(1);
424	>	try (PoolCleaner cleaner = cleaner(p, done)) {
425	>	assertEquals(0, p.getPoolSize());
426	>	p.execute(new CheckedRunnable() {
427	>	public void realRun() throws InterruptedException {
428	>	threadStarted.countDown();
429	>	assertEquals(1, p.getPoolSize());
430	>	await(done);
431	>	}});
432	>	await(threadStarted);
433	>	assertEquals(1, p.getPoolSize());
434	>	}
435	>	}
436	>
437	>	/**
438	>	* getTaskCount increases, but doesn't overestimate, when tasks
439	>	* submitted
440	>	*/
441	>	public void testGetTaskCount() throws InterruptedException {
442	>	final int TASKS = 3;
443	>	final CountDownLatch done = new CountDownLatch(1);
444	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
445	>	try (PoolCleaner cleaner = cleaner(p, done)) {
446	>	final CountDownLatch threadStarted = new CountDownLatch(1);
447	>	assertEquals(0, p.getTaskCount());
448	>	assertEquals(0, p.getCompletedTaskCount());
449	>	p.execute(new CheckedRunnable() {
450	>	public void realRun() throws InterruptedException {
451	>	threadStarted.countDown();
452	>	await(done);
453	>	}});
454	>	await(threadStarted);
455	>	assertEquals(1, p.getTaskCount());
456	>	assertEquals(0, p.getCompletedTaskCount());
457	>	for (int i = 0; i < TASKS; i++) {
458	>	assertEquals(1 + i, p.getTaskCount());
459	>	p.execute(new CheckedRunnable() {
460	>	public void realRun() throws InterruptedException {
461	>	threadStarted.countDown();
462	>	assertEquals(1 + TASKS, p.getTaskCount());
463	>	await(done);
464	>	}});
465	>	}
466	>	assertEquals(1 + TASKS, p.getTaskCount());
467	>	assertEquals(0, p.getCompletedTaskCount());
468	>	}
469	>	assertEquals(1 + TASKS, p.getTaskCount());
470	>	assertEquals(1 + TASKS, p.getCompletedTaskCount());
471		}
472
473		/**
474	<	*  Test to verify scheduleAtFixedRate(Runnable, long, long, TimeUnit) throws
208	<	*  RejectedExecutionException.
209	<	*  This occurs on an attempt to schedule a task on a shutdown executor
474	>	* getThreadFactory returns factory in constructor if not set
475		*/
476	<	public void testScheduleAtFixedRate1_RejectedExecutionException(){
477	<	try{
478	<	ScheduledExecutor se = new ScheduledExecutor(1);
479	<	se.shutdown();
480	<	se.scheduleAtFixedRate(new Runnable(){
481	<	public void run(){}
482	<	}, 100, 100, TimeUnit.SECONDS);
218	<	fail("should throw");
219	<	}catch(RejectedExecutionException e){}
476	>	public void testGetThreadFactory() throws InterruptedException {
477	>	final ThreadFactory threadFactory = new SimpleThreadFactory();
478	>	final ScheduledThreadPoolExecutor p =
479	>	new ScheduledThreadPoolExecutor(1, threadFactory);
480	>	try (PoolCleaner cleaner = cleaner(p)) {
481	>	assertSame(threadFactory, p.getThreadFactory());
482	>	}
483		}
484	<
484	>
485		/**
486	<	*  Test to verify scheduleAtFixedRate(Runnable, long, long, TimeUnit) throws
224	<	*  RejectedExecutionException.
225	<	*  This occurs on an attempt to schedule a task on a shutdown executor
486	>	* setThreadFactory sets the thread factory returned by getThreadFactory
487		*/
488	<	public void testScheduleAtFixedRate2_RejectedExecutionException(){
489	<	try{
490	<	ScheduledExecutor se = new ScheduledExecutor(1);
491	<	se.shutdown();
492	<	se.scheduleAtFixedRate(new Runnable(){
493	<	public void run(){}
494	<	},  1, 100, TimeUnit.SECONDS);
234	<	fail("should throw");
235	<	}catch(RejectedExecutionException e){}
488	>	public void testSetThreadFactory() throws InterruptedException {
489	>	ThreadFactory threadFactory = new SimpleThreadFactory();
490	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
491	>	try (PoolCleaner cleaner = cleaner(p)) {
492	>	p.setThreadFactory(threadFactory);
493	>	assertSame(threadFactory, p.getThreadFactory());
494	>	}
495		}
496
497		/**
498	<	*  Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws
240	<	*  RejectedExecutionException.
241	<	*  This occurs on an attempt to schedule a task on a shutdown executor
498	>	* setThreadFactory(null) throws NPE
499		*/
500	<	public void testScheduleWithFixedDelay1_RejectedExecutionException(){
501	<	try{
502	<	ScheduledExecutor se = new ScheduledExecutor(1);
503	<	se.shutdown();
504	<	se.scheduleWithFixedDelay(new Runnable(){
505	<	public void run(){}
506	<	}, 100, 100, TimeUnit.SECONDS);
507	<	fail("should throw");
251	<	}catch(RejectedExecutionException e){}
500	>	public void testSetThreadFactoryNull() throws InterruptedException {
501	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
502	>	try (PoolCleaner cleaner = cleaner(p)) {
503	>	try {
504	>	p.setThreadFactory(null);
505	>	shouldThrow();
506	>	} catch (NullPointerException success) {}
507	>	}
508		}
509
510		/**
511	<	*  Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws
256	<	*  RejectedExecutionException.
257	<	*  This occurs on an attempt to schedule a task on a shutdown executor
511	>	* isShutdown is false before shutdown, true after
512		*/
513	<	public void testScheduleWithFixedDelay2_RejectedExecutionException(){
514	<	try{
515	<	ScheduledExecutor se = new ScheduledExecutor(1);
516	<	se.shutdown();
517	<	se.scheduleWithFixedDelay(new Runnable(){
518	<	public void run(){}
519	<	},  1, 100, TimeUnit.SECONDS);
520	<	fail("should throw");
521	<	}catch(RejectedExecutionException e){}
513	>	public void testIsShutdown() {
514	>
515	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
516	>	try {
517	>	assertFalse(p.isShutdown());
518	>	}
519	>	finally {
520	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
521	>	}
522	>	assertTrue(p.isShutdown());
523		}
524
525		/**
526	<	*  Test to verify execute throws RejectedExecutionException
272	<	*  This occurs on an attempt to schedule a task on a shutdown executor
526	>	* isTerminated is false before termination, true after
527		*/
528	<	public void testExecute_RejectedExecutionException(){
529	<	try{
530	<	ScheduledExecutor se = new ScheduledExecutor(1);
531	<	se.shutdown();
532	<	se.execute(new Runnable(){
533	<	public void run(){}
534	<	});
535	<	fail("should throw");
536	<	}catch(RejectedExecutionException e){}
528	>	public void testIsTerminated() throws InterruptedException {
529	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
530	>	try (PoolCleaner cleaner = cleaner(p)) {
531	>	final CountDownLatch threadStarted = new CountDownLatch(1);
532	>	final CountDownLatch done = new CountDownLatch(1);
533	>	assertFalse(p.isTerminated());
534	>	p.execute(new CheckedRunnable() {
535	>	public void realRun() throws InterruptedException {
536	>	assertFalse(p.isTerminated());
537	>	threadStarted.countDown();
538	>	await(done);
539	>	}});
540	>	await(threadStarted);
541	>	assertFalse(p.isTerminating());
542	>	done.countDown();
543	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
544	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
545	>	assertTrue(p.isTerminated());
546	>	}
547	>	}
548	>
549	>	/**
550	>	* isTerminating is not true when running or when terminated
551	>	*/
552	>	public void testIsTerminating() throws InterruptedException {
553	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
554	>	final CountDownLatch threadStarted = new CountDownLatch(1);
555	>	final CountDownLatch done = new CountDownLatch(1);
556	>	try (PoolCleaner cleaner = cleaner(p)) {
557	>	assertFalse(p.isTerminating());
558	>	p.execute(new CheckedRunnable() {
559	>	public void realRun() throws InterruptedException {
560	>	assertFalse(p.isTerminating());
561	>	threadStarted.countDown();
562	>	await(done);
563	>	}});
564	>	await(threadStarted);
565	>	assertFalse(p.isTerminating());
566	>	done.countDown();
567	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
568	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
569	>	assertTrue(p.isTerminated());
570	>	assertFalse(p.isTerminating());
571	>	}
572	>	}
573	>
574	>	/**
575	>	* getQueue returns the work queue, which contains queued tasks
576	>	*/
577	>	public void testGetQueue() throws InterruptedException {
578	>	final CountDownLatch done = new CountDownLatch(1);
579	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
580	>	try (PoolCleaner cleaner = cleaner(p, done)) {
581	>	final CountDownLatch threadStarted = new CountDownLatch(1);
582	>	ScheduledFuture[] tasks = new ScheduledFuture[5];
583	>	for (int i = 0; i < tasks.length; i++) {
584	>	Runnable r = new CheckedRunnable() {
585	>	public void realRun() throws InterruptedException {
586	>	threadStarted.countDown();
587	>	await(done);
588	>	}};
589	>	tasks[i] = p.schedule(r, 1, MILLISECONDS);
590	>	}
591	>	await(threadStarted);
592	>	BlockingQueue<Runnable> q = p.getQueue();
593	>	assertTrue(q.contains(tasks[tasks.length - 1]));
594	>	assertFalse(q.contains(tasks[0]));
595	>	}
596		}
597
598	+	/**
599	+	* remove(task) removes queued task, and fails to remove active task
600	+	*/
601	+	public void testRemove() throws InterruptedException {
602	+	final CountDownLatch done = new CountDownLatch(1);
603	+	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
604	+	try (PoolCleaner cleaner = cleaner(p, done)) {
605	+	ScheduledFuture[] tasks = new ScheduledFuture[5];
606	+	final CountDownLatch threadStarted = new CountDownLatch(1);
607	+	for (int i = 0; i < tasks.length; i++) {
608	+	Runnable r = new CheckedRunnable() {
609	+	public void realRun() throws InterruptedException {
610	+	threadStarted.countDown();
611	+	await(done);
612	+	}};
613	+	tasks[i] = p.schedule(r, 1, MILLISECONDS);
614	+	}
615	+	await(threadStarted);
616	+	BlockingQueue<Runnable> q = p.getQueue();
617	+	assertFalse(p.remove((Runnable)tasks[0]));
618	+	assertTrue(q.contains((Runnable)tasks[4]));
619	+	assertTrue(q.contains((Runnable)tasks[3]));
620	+	assertTrue(p.remove((Runnable)tasks[4]));
621	+	assertFalse(p.remove((Runnable)tasks[4]));
622	+	assertFalse(q.contains((Runnable)tasks[4]));
623	+	assertTrue(q.contains((Runnable)tasks[3]));
624	+	assertTrue(p.remove((Runnable)tasks[3]));
625	+	assertFalse(q.contains((Runnable)tasks[3]));
626	+	}
627	+	}
628
629	+	/**
630	+	* purge eventually removes cancelled tasks from the queue
631	+	*/
632	+	public void testPurge() throws InterruptedException {
633	+	final ScheduledFuture[] tasks = new ScheduledFuture[5];
634	+	final Runnable releaser = new Runnable() { public void run() {
635	+	for (ScheduledFuture task : tasks)
636	+	if (task != null) task.cancel(true); }};
637	+	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
638	+	try (PoolCleaner cleaner = cleaner(p, releaser)) {
639	+	for (int i = 0; i < tasks.length; i++)
640	+	tasks[i] = p.schedule(new SmallPossiblyInterruptedRunnable(),
641	+	LONG_DELAY_MS, MILLISECONDS);
642	+	int max = tasks.length;
643	+	if (tasks[4].cancel(true)) --max;
644	+	if (tasks[3].cancel(true)) --max;
645	+	// There must eventually be an interference-free point at
646	+	// which purge will not fail. (At worst, when queue is empty.)
647	+	long startTime = System.nanoTime();
648	+	do {
649	+	p.purge();
650	+	long count = p.getTaskCount();
651	+	if (count == max)
652	+	return;
653	+	} while (millisElapsedSince(startTime) < LONG_DELAY_MS);
654	+	fail("Purge failed to remove cancelled tasks");
655	+	}
656	+	}
657
658		/**
659	<	*  Test to verify getActiveCount gives correct values
660	<	*/
661	<	public void testGetActiveCount(){
662	<	ScheduledExecutor two = new ScheduledExecutor(2);
659	>	* shutdownNow returns a list containing tasks that were not run,
660	>	* and those tasks are drained from the queue
661	>	*/
662	>	public void testShutdownNow() throws InterruptedException {
663	>	final int poolSize = 2;
664	>	final int count = 5;
665	>	final AtomicInteger ran = new AtomicInteger(0);
666	>	final ScheduledThreadPoolExecutor p =
667	>	new ScheduledThreadPoolExecutor(poolSize);
668	>	final CountDownLatch threadsStarted = new CountDownLatch(poolSize);
669	>	Runnable waiter = new CheckedRunnable() { public void realRun() {
670	>	threadsStarted.countDown();
671	>	try {
672	>	MILLISECONDS.sleep(2 * LONG_DELAY_MS);
673	>	} catch (InterruptedException success) {}
674	>	ran.getAndIncrement();
675	>	}};
676	>	for (int i = 0; i < count; i++)
677	>	p.execute(waiter);
678	>	await(threadsStarted);
679	>	assertEquals(poolSize, p.getActiveCount());
680	>	assertEquals(0, p.getCompletedTaskCount());
681	>	final List<Runnable> queuedTasks;
682		try {
683	<	assertEquals(0, two.getActiveCount());
684	<	two.execute(newRunnable());
685	<	try{
686	<	Thread.sleep(SHORT_DELAY_MS/2);
687	<	} catch(Exception e){
688	<	fail("unexpected exception");
683	>	queuedTasks = p.shutdownNow();
684	>	} catch (SecurityException ok) {
685	>	return; // Allowed in case test doesn't have privs
686	>	}
687	>	assertTrue(p.isShutdown());
688	>	assertTrue(p.getQueue().isEmpty());
689	>	assertEquals(count - poolSize, queuedTasks.size());
690	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
691	>	assertTrue(p.isTerminated());
692	>	assertEquals(poolSize, ran.get());
693	>	assertEquals(poolSize, p.getCompletedTaskCount());
694	>	}
695	>
696	>	/**
697	>	* shutdownNow returns a list containing tasks that were not run,
698	>	* and those tasks are drained from the queue
699	>	*/
700	>	public void testShutdownNow_delayedTasks() throws InterruptedException {
701	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
702	>	List<ScheduledFuture> tasks = new ArrayList<>();
703	>	for (int i = 0; i < 3; i++) {
704	>	Runnable r = new NoOpRunnable();
705	>	tasks.add(p.schedule(r, 9, SECONDS));
706	>	tasks.add(p.scheduleAtFixedRate(r, 9, 9, SECONDS));
707	>	tasks.add(p.scheduleWithFixedDelay(r, 9, 9, SECONDS));
708	>	}
709	>	if (testImplementationDetails)
710	>	assertEquals(new HashSet(tasks), new HashSet(p.getQueue()));
711	>	final List<Runnable> queuedTasks;
712	>	try {
713	>	queuedTasks = p.shutdownNow();
714	>	} catch (SecurityException ok) {
715	>	return; // Allowed in case test doesn't have privs
716	>	}
717	>	assertTrue(p.isShutdown());
718	>	assertTrue(p.getQueue().isEmpty());
719	>	if (testImplementationDetails)
720	>	assertEquals(new HashSet(tasks), new HashSet(queuedTasks));
721	>	assertEquals(tasks.size(), queuedTasks.size());
722	>	for (ScheduledFuture task : tasks) {
723	>	assertFalse(task.isDone());
724	>	assertFalse(task.isCancelled());
725	>	}
726	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
727	>	assertTrue(p.isTerminated());
728	>	}
729	>
730	>	/**
731	>	* By default, periodic tasks are cancelled at shutdown.
732	>	* By default, delayed tasks keep running after shutdown.
733	>	* Check that changing the default values work:
734	>	* - setExecuteExistingDelayedTasksAfterShutdownPolicy
735	>	* - setContinueExistingPeriodicTasksAfterShutdownPolicy
736	>	*/
737	>	public void testShutdown_cancellation() throws Exception {
738	>	Boolean[] allBooleans = { null, Boolean.FALSE, Boolean.TRUE };
739	>	for (Boolean policy : allBooleans)
740	>	{
741	>	final int poolSize = 2;
742	>	final ScheduledThreadPoolExecutor p
743	>	= new ScheduledThreadPoolExecutor(poolSize);
744	>	final boolean effectiveDelayedPolicy = (policy != Boolean.FALSE);
745	>	final boolean effectivePeriodicPolicy = (policy == Boolean.TRUE);
746	>	final boolean effectiveRemovePolicy = (policy == Boolean.TRUE);
747	>	if (policy != null) {
748	>	p.setExecuteExistingDelayedTasksAfterShutdownPolicy(policy);
749	>	p.setContinueExistingPeriodicTasksAfterShutdownPolicy(policy);
750	>	p.setRemoveOnCancelPolicy(policy);
751	>	}
752	>	assertEquals(effectiveDelayedPolicy,
753	>	p.getExecuteExistingDelayedTasksAfterShutdownPolicy());
754	>	assertEquals(effectivePeriodicPolicy,
755	>	p.getContinueExistingPeriodicTasksAfterShutdownPolicy());
756	>	assertEquals(effectiveRemovePolicy,
757	>	p.getRemoveOnCancelPolicy());
758	>	// Strategy: Wedge the pool with poolSize "blocker" threads
759	>	final AtomicInteger ran = new AtomicInteger(0);
760	>	final CountDownLatch poolBlocked = new CountDownLatch(poolSize);
761	>	final CountDownLatch unblock = new CountDownLatch(1);
762	>	final CountDownLatch periodicLatch1 = new CountDownLatch(2);
763	>	final CountDownLatch periodicLatch2 = new CountDownLatch(2);
764	>	Runnable task = new CheckedRunnable() { public void realRun()
765	>	throws InterruptedException {
766	>	poolBlocked.countDown();
767	>	assertTrue(unblock.await(LONG_DELAY_MS, MILLISECONDS));
768	>	ran.getAndIncrement();
769	>	}};
770	>	List<Future<?>> blockers = new ArrayList<>();
771	>	List<Future<?>> periodics = new ArrayList<>();
772	>	List<Future<?>> delayeds = new ArrayList<>();
773	>	for (int i = 0; i < poolSize; i++)
774	>	blockers.add(p.submit(task));
775	>	assertTrue(poolBlocked.await(LONG_DELAY_MS, MILLISECONDS));
776	>
777	>	periodics.add(p.scheduleAtFixedRate(countDowner(periodicLatch1),
778	>	1, 1, MILLISECONDS));
779	>	periodics.add(p.scheduleWithFixedDelay(countDowner(periodicLatch2),
780	>	1, 1, MILLISECONDS));
781	>	delayeds.add(p.schedule(task, 1, MILLISECONDS));
782	>
783	>	assertTrue(p.getQueue().containsAll(periodics));
784	>	assertTrue(p.getQueue().containsAll(delayeds));
785	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
786	>	assertTrue(p.isShutdown());
787	>	assertFalse(p.isTerminated());
788	>	for (Future<?> periodic : periodics) {
789	>	assertTrue(effectivePeriodicPolicy ^ periodic.isCancelled());
790	>	assertTrue(effectivePeriodicPolicy ^ periodic.isDone());
791	>	}
792	>	for (Future<?> delayed : delayeds) {
793	>	assertTrue(effectiveDelayedPolicy ^ delayed.isCancelled());
794	>	assertTrue(effectiveDelayedPolicy ^ delayed.isDone());
795	>	}
796	>	if (testImplementationDetails) {
797	>	assertEquals(effectivePeriodicPolicy,
798	>	p.getQueue().containsAll(periodics));
799	>	assertEquals(effectiveDelayedPolicy,
800	>	p.getQueue().containsAll(delayeds));
801	>	}
802	>	// Release all pool threads
803	>	unblock.countDown();
804	>
805	>	for (Future<?> delayed : delayeds) {
806	>	if (effectiveDelayedPolicy) {
807	>	assertNull(delayed.get());
808	>	}
809	>	}
810	>	if (effectivePeriodicPolicy) {
811	>	assertTrue(periodicLatch1.await(LONG_DELAY_MS, MILLISECONDS));
812	>	assertTrue(periodicLatch2.await(LONG_DELAY_MS, MILLISECONDS));
813	>	for (Future<?> periodic : periodics) {
814	>	assertTrue(periodic.cancel(false));
815	>	assertTrue(periodic.isCancelled());
816	>	assertTrue(periodic.isDone());
817		}
818	<	assertEquals(1, two.getActiveCount());
819	<	} finally {
820	<	two.shutdown();
818	>	}
819	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
820	>	assertTrue(p.isTerminated());
821	>	assertEquals(2 + (effectiveDelayedPolicy ? 1 : 0), ran.get());
822	>	}}
823	>
824	>	/**
825	>	* completed submit of callable returns result
826	>	*/
827	>	public void testSubmitCallable() throws Exception {
828	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
829	>	try (PoolCleaner cleaner = cleaner(e)) {
830	>	Future<String> future = e.submit(new StringTask());
831	>	String result = future.get();
832	>	assertSame(TEST_STRING, result);
833		}
834		}
835	<
835	>
836		/**
837	<	*  Test to verify getCompleteTaskCount gives correct values
837	>	* completed submit of runnable returns successfully
838		*/
839	<	public void testGetCompletedTaskCount(){
840	<	ScheduledExecutor two = new ScheduledExecutor(2);
841	<	try {
842	<	assertEquals(0, two.getCompletedTaskCount());
843	<	two.execute(newRunnable());
844	<	try{
315	<	Thread.sleep(MEDIUM_DELAY_MS);
316	<	} catch(Exception e){
317	<	fail("unexpected exception");
318	<	}
319	<	assertEquals(1, two.getCompletedTaskCount());
320	<	} finally {
321	<	two.shutdown();
839	>	public void testSubmitRunnable() throws Exception {
840	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
841	>	try (PoolCleaner cleaner = cleaner(e)) {
842	>	Future<?> future = e.submit(new NoOpRunnable());
843	>	future.get();
844	>	assertTrue(future.isDone());
845		}
846		}
847	<
847	>
848		/**
849	<	*  Test to verify getCorePoolSize gives correct values
849	>	* completed submit of (runnable, result) returns result
850		*/
851	<	public void testGetCorePoolSize(){
852	<	ScheduledExecutor one = new ScheduledExecutor(1);
853	<	try {
854	<	assertEquals(1, one.getCorePoolSize());
855	<	} finally {
856	<	one.shutdown();
851	>	public void testSubmitRunnable2() throws Exception {
852	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
853	>	try (PoolCleaner cleaner = cleaner(e)) {
854	>	Future<String> future = e.submit(new NoOpRunnable(), TEST_STRING);
855	>	String result = future.get();
856	>	assertSame(TEST_STRING, result);
857		}
858		}
859	<
859	>
860		/**
861	<	*  Test to verify getLargestPoolSize gives correct values
861	>	* invokeAny(null) throws NPE
862		*/
863	<	public void testGetLargestPoolSize(){
864	<	ScheduledExecutor two = new ScheduledExecutor(2);
865	<	try {
866	<	assertEquals(0, two.getLargestPoolSize());
867	<	two.execute(newRunnable());
868	<	two.execute(newRunnable());
869	<	try{
870	<	Thread.sleep(SHORT_DELAY_MS);
871	<	} catch(Exception e){
872	<	fail("unexpected exception");
863	>	public void testInvokeAny1() throws Exception {
864	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
865	>	try (PoolCleaner cleaner = cleaner(e)) {
866	>	try {
867	>	e.invokeAny(null);
868	>	shouldThrow();
869	>	} catch (NullPointerException success) {}
870	>	}
871	>	}
872	>
873	>	/**
874	>	* invokeAny(empty collection) throws IAE
875	>	*/
876	>	public void testInvokeAny2() throws Exception {
877	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
878	>	try (PoolCleaner cleaner = cleaner(e)) {
879	>	try {
880	>	e.invokeAny(new ArrayList<Callable<String>>());
881	>	shouldThrow();
882	>	} catch (IllegalArgumentException success) {}
883	>	}
884	>	}
885	>
886	>	/**
887	>	* invokeAny(c) throws NPE if c has null elements
888	>	*/
889	>	public void testInvokeAny3() throws Exception {
890	>	CountDownLatch latch = new CountDownLatch(1);
891	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
892	>	try (PoolCleaner cleaner = cleaner(e)) {
893	>	List<Callable<String>> l = new ArrayList<Callable<String>>();
894	>	l.add(latchAwaitingStringTask(latch));
895	>	l.add(null);
896	>	try {
897	>	e.invokeAny(l);
898	>	shouldThrow();
899	>	} catch (NullPointerException success) {}
900	>	latch.countDown();
901	>	}
902	>	}
903	>
904	>	/**
905	>	* invokeAny(c) throws ExecutionException if no task completes
906	>	*/
907	>	public void testInvokeAny4() throws Exception {
908	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
909	>	try (PoolCleaner cleaner = cleaner(e)) {
910	>	List<Callable<String>> l = new ArrayList<Callable<String>>();
911	>	l.add(new NPETask());
912	>	try {
913	>	e.invokeAny(l);
914	>	shouldThrow();
915	>	} catch (ExecutionException success) {
916	>	assertTrue(success.getCause() instanceof NullPointerException);
917		}
351	–	assertEquals(2, two.getLargestPoolSize());
352	–	} finally {
353	–	two.shutdown();
918		}
919		}
920	<
920	>
921		/**
922	<	*  Test to verify getPoolSize gives correct values
922	>	* invokeAny(c) returns result of some task
923		*/
924	<	public void testGetPoolSize(){
925	<	ScheduledExecutor one = new ScheduledExecutor(1);
926	<	try {
927	<	assertEquals(0, one.getPoolSize());
928	<	one.execute(newRunnable());
929	<	assertEquals(1, one.getPoolSize());
930	<	} finally {
931	<	one.shutdown();
924	>	public void testInvokeAny5() throws Exception {
925	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
926	>	try (PoolCleaner cleaner = cleaner(e)) {
927	>	List<Callable<String>> l = new ArrayList<Callable<String>>();
928	>	l.add(new StringTask());
929	>	l.add(new StringTask());
930	>	String result = e.invokeAny(l);
931	>	assertSame(TEST_STRING, result);
932		}
933		}
934	<
934	>
935		/**
936	<	*  Test to verify getTaskCount gives correct values
936	>	* invokeAll(null) throws NPE
937		*/
938	<	public void testGetTaskCount(){
939	<	ScheduledExecutor one = new ScheduledExecutor(1);
940	<	try {
941	<	assertEquals(0, one.getTaskCount());
942	<	for(int i = 0; i < 5; i++)
943	<	one.execute(newRunnable());
944	<	try{
381	<	Thread.sleep(SHORT_DELAY_MS);
382	<	} catch(Exception e){
383	<	fail("unexpected exception");
384	<	}
385	<	assertEquals(5, one.getTaskCount());
386	<	} finally {
387	<	one.shutdown();
388	<	}
389	<	}
390	<
391	<	/**
392	<	*  Test to verify isShutDown gives correct values
393	<	*/
394	<	public void testIsShutdown(){
395	<
396	<	ScheduledExecutor one = new ScheduledExecutor(1);
397	<	try {
398	<	assertFalse(one.isShutdown());
938	>	public void testInvokeAll1() throws Exception {
939	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
940	>	try (PoolCleaner cleaner = cleaner(e)) {
941	>	try {
942	>	e.invokeAll(null);
943	>	shouldThrow();
944	>	} catch (NullPointerException success) {}
945		}
946	<	finally {
947	<	one.shutdown();
946	>	}
947	>
948	>	/**
949	>	* invokeAll(empty collection) returns empty collection
950	>	*/
951	>	public void testInvokeAll2() throws Exception {
952	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
953	>	try (PoolCleaner cleaner = cleaner(e)) {
954	>	List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>());
955	>	assertTrue(r.isEmpty());
956		}
403	–	assertTrue(one.isShutdown());
957		}
958
406	–
959		/**
960	<	*  Test to verify isTerminated gives correct values
409	<	*  Makes sure termination does not take an innapropriate
410	<	*  amount of time
960	>	* invokeAll(c) throws NPE if c has null elements
961		*/
962	<	public void testIsTerminated(){
963	<	ScheduledExecutor one = new ScheduledExecutor(1);
964	<	try {
965	<	one.execute(newRunnable());
966	<	} finally {
967	<	one.shutdown();
968	<	}
969	<	boolean flag = false;
970	<	try{
971	<	flag = one.awaitTermination(10, TimeUnit.SECONDS);
972	<	} catch(Exception e){
423	<	fail("unexpected exception");
424	<	}
425	<	assertTrue(one.isTerminated());
426	<	if(!flag)
427	<	fail("ThreadPoolExecutor - thread pool did not terminate within suitable timeframe");
962	>	public void testInvokeAll3() throws Exception {
963	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
964	>	try (PoolCleaner cleaner = cleaner(e)) {
965	>	List<Callable<String>> l = new ArrayList<Callable<String>>();
966	>	l.add(new StringTask());
967	>	l.add(null);
968	>	try {
969	>	e.invokeAll(l);
970	>	shouldThrow();
971	>	} catch (NullPointerException success) {}
972	>	}
973		}
974
975		/**
976	<	*  Test to verify that purge correctly removes cancelled tasks
432	<	*  from the queue
976	>	* get of invokeAll(c) throws exception on failed task
977		*/
978	<	public void testPurge(){
979	<	ScheduledExecutor one = new ScheduledExecutor(1);
980	<	try {
981	<	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
982	<	for(int i = 0; i < 5; i++){
983	<	tasks[i] = one.schedule(newRunnable(), 1, TimeUnit.MILLISECONDS);
978	>	public void testInvokeAll4() throws Exception {
979	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
980	>	try (PoolCleaner cleaner = cleaner(e)) {
981	>	List<Callable<String>> l = new ArrayList<Callable<String>>();
982	>	l.add(new NPETask());
983	>	List<Future<String>> futures = e.invokeAll(l);
984	>	assertEquals(1, futures.size());
985	>	try {
986	>	futures.get(0).get();
987	>	shouldThrow();
988	>	} catch (ExecutionException success) {
989	>	assertTrue(success.getCause() instanceof NullPointerException);
990		}
441	–	int max = 5;
442	–	if (tasks[4].cancel(true)) --max;
443	–	if (tasks[3].cancel(true)) --max;
444	–	one.purge();
445	–	long count = one.getTaskCount();
446	–	assertTrue(count > 0 && count <= max);
447	–	} finally {
448	–	one.shutdown();
991		}
992		}
993
994		/**
995	<	*  Test to verify shutDownNow returns a list
454	<	*  containing the correct number of elements
995	>	* invokeAll(c) returns results of all completed tasks
996		*/
997	<	public void testShutDownNow(){
998	<	ScheduledExecutor one = new ScheduledExecutor(1);
999	<	for(int i = 0; i < 5; i++)
1000	<	one.schedule(newRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
1001	<	List l = one.shutdownNow();
1002	<	assertTrue(one.isShutdown());
1003	<	assertTrue(l.size() > 0 && l.size() <= 5);
997	>	public void testInvokeAll5() throws Exception {
998	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
999	>	try (PoolCleaner cleaner = cleaner(e)) {
1000	>	List<Callable<String>> l = new ArrayList<Callable<String>>();
1001	>	l.add(new StringTask());
1002	>	l.add(new StringTask());
1003	>	List<Future<String>> futures = e.invokeAll(l);
1004	>	assertEquals(2, futures.size());
1005	>	for (Future<String> future : futures)
1006	>	assertSame(TEST_STRING, future.get());
1007	>	}
1008		}
1009
1010	<	public void testShutDown1(){
1011	<	try {
1012	<	ScheduledExecutor one = new ScheduledExecutor(1);
1013	<	assertTrue(one.getExecuteExistingDelayedTasksAfterShutdownPolicy());
1014	<	assertFalse(one.getContinueExistingPeriodicTasksAfterShutdownPolicy());
1010	>	/**
1011	>	* timed invokeAny(null) throws NPE
1012	>	*/
1013	>	public void testTimedInvokeAny1() throws Exception {
1014	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1015	>	try (PoolCleaner cleaner = cleaner(e)) {
1016	>	try {
1017	>	e.invokeAny(null, MEDIUM_DELAY_MS, MILLISECONDS);
1018	>	shouldThrow();
1019	>	} catch (NullPointerException success) {}
1020	>	}
1021	>	}
1022
1023	<	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
1024	<	for(int i = 0; i < 5; i++)
1025	<	tasks[i] = one.schedule(newNoopRunnable(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS);
1026	<	one.shutdown();
1027	<	BlockingQueue q = one.getQueue();
1028	<	for (Iterator it = q.iterator(); it.hasNext();) {
1029	<	ScheduledCancellable t = (ScheduledCancellable)it.next();
1030	<	assertFalse(t.isCancelled());
1031	<	}
1032	<	assertTrue(one.isShutdown());
1033	<	Thread.sleep(SHORT_DELAY_MS);
1034	<	for (int i = 0; i < 5; ++i) {
483	<	assertTrue(tasks[i].isDone());
484	<	assertFalse(tasks[i].isCancelled());
485	<	}
486	<
1023	>	/**
1024	>	* timed invokeAny(,,null) throws NPE
1025	>	*/
1026	>	public void testTimedInvokeAnyNullTimeUnit() throws Exception {
1027	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1028	>	try (PoolCleaner cleaner = cleaner(e)) {
1029	>	List<Callable<String>> l = new ArrayList<Callable<String>>();
1030	>	l.add(new StringTask());
1031	>	try {
1032	>	e.invokeAny(l, MEDIUM_DELAY_MS, null);
1033	>	shouldThrow();
1034	>	} catch (NullPointerException success) {}
1035		}
1036	<	catch(Exception ex) {
1037	<	fail("unexpected exception");
1036	>	}
1037	>
1038	>	/**
1039	>	* timed invokeAny(empty collection) throws IAE
1040	>	*/
1041	>	public void testTimedInvokeAny2() throws Exception {
1042	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1043	>	try (PoolCleaner cleaner = cleaner(e)) {
1044	>	try {
1045	>	e.invokeAny(new ArrayList<Callable<String>>(), MEDIUM_DELAY_MS, MILLISECONDS);
1046	>	shouldThrow();
1047	>	} catch (IllegalArgumentException success) {}
1048		}
1049		}
1050
1051	+	/**
1052	+	* timed invokeAny(c) throws NPE if c has null elements
1053	+	*/
1054	+	public void testTimedInvokeAny3() throws Exception {
1055	+	CountDownLatch latch = new CountDownLatch(1);
1056	+	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1057	+	try (PoolCleaner cleaner = cleaner(e)) {
1058	+	List<Callable<String>> l = new ArrayList<Callable<String>>();
1059	+	l.add(latchAwaitingStringTask(latch));
1060	+	l.add(null);
1061	+	try {
1062	+	e.invokeAny(l, MEDIUM_DELAY_MS, MILLISECONDS);
1063	+	shouldThrow();
1064	+	} catch (NullPointerException success) {}
1065	+	latch.countDown();
1066	+	}
1067	+	}
1068
1069	<	public void testShutDown2(){
1070	<	try {
1071	<	ScheduledExecutor one = new ScheduledExecutor(1);
1072	<	one.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
1073	<	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
1074	<	for(int i = 0; i < 5; i++)
1075	<	tasks[i] = one.schedule(newNoopRunnable(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS);
1076	<	one.shutdown();
1077	<	assertTrue(one.isShutdown());
1078	<	BlockingQueue q = one.getQueue();
1079	<	assertTrue(q.isEmpty());
1080	<	Thread.sleep(SHORT_DELAY_MS);
1081	<	assertTrue(one.isTerminated());
1069	>	/**
1070	>	* timed invokeAny(c) throws ExecutionException if no task completes
1071	>	*/
1072	>	public void testTimedInvokeAny4() throws Exception {
1073	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1074	>	try (PoolCleaner cleaner = cleaner(e)) {
1075	>	long startTime = System.nanoTime();
1076	>	List<Callable<String>> l = new ArrayList<Callable<String>>();
1077	>	l.add(new NPETask());
1078	>	try {
1079	>	e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS);
1080	>	shouldThrow();
1081	>	} catch (ExecutionException success) {
1082	>	assertTrue(success.getCause() instanceof NullPointerException);
1083	>	}
1084	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1085		}
1086	<	catch(Exception ex) {
1087	<	fail("unexpected exception");
1086	>	}
1087	>
1088	>	/**
1089	>	* timed invokeAny(c) returns result of some task
1090	>	*/
1091	>	public void testTimedInvokeAny5() throws Exception {
1092	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1093	>	try (PoolCleaner cleaner = cleaner(e)) {
1094	>	long startTime = System.nanoTime();
1095	>	List<Callable<String>> l = new ArrayList<Callable<String>>();
1096	>	l.add(new StringTask());
1097	>	l.add(new StringTask());
1098	>	String result = e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS);
1099	>	assertSame(TEST_STRING, result);
1100	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1101		}
1102		}
1103
1104	+	/**
1105	+	* timed invokeAll(null) throws NPE
1106	+	*/
1107	+	public void testTimedInvokeAll1() throws Exception {
1108	+	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1109	+	try (PoolCleaner cleaner = cleaner(e)) {
1110	+	try {
1111	+	e.invokeAll(null, MEDIUM_DELAY_MS, MILLISECONDS);
1112	+	shouldThrow();
1113	+	} catch (NullPointerException success) {}
1114	+	}
1115	+	}
1116
1117	<	public void testShutDown3(){
1118	<	try {
1119	<	ScheduledExecutor one = new ScheduledExecutor(1);
1120	<	one.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
1121	<	ScheduledCancellable task =
1122	<	one.scheduleAtFixedRate(newNoopRunnable(), 5, 5, TimeUnit.MILLISECONDS);
1123	<	one.shutdown();
1124	<	assertTrue(one.isShutdown());
1125	<	BlockingQueue q = one.getQueue();
1126	<	assertTrue(q.isEmpty());
1127	<	Thread.sleep(SHORT_DELAY_MS);
1128	<	assertTrue(one.isTerminated());
1117	>	/**
1118	>	* timed invokeAll(,,null) throws NPE
1119	>	*/
1120	>	public void testTimedInvokeAllNullTimeUnit() throws Exception {
1121	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1122	>	try (PoolCleaner cleaner = cleaner(e)) {
1123	>	List<Callable<String>> l = new ArrayList<Callable<String>>();
1124	>	l.add(new StringTask());
1125	>	try {
1126	>	e.invokeAll(l, MEDIUM_DELAY_MS, null);
1127	>	shouldThrow();
1128	>	} catch (NullPointerException success) {}
1129		}
1130	<	catch(Exception ex) {
1131	<	fail("unexpected exception");
1130	>	}
1131	>
1132	>	/**
1133	>	* timed invokeAll(empty collection) returns empty collection
1134	>	*/
1135	>	public void testTimedInvokeAll2() throws Exception {
1136	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1137	>	try (PoolCleaner cleaner = cleaner(e)) {
1138	>	List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>(),
1139	>	MEDIUM_DELAY_MS, MILLISECONDS);
1140	>	assertTrue(r.isEmpty());
1141		}
1142		}
1143
1144	<	public void testShutDown4(){
1145	<	ScheduledExecutor one = new ScheduledExecutor(1);
1146	<	try {
1147	<	one.setContinueExistingPeriodicTasksAfterShutdownPolicy(true);
1148	<	ScheduledCancellable task =
1149	<	one.scheduleAtFixedRate(newNoopRunnable(), 5, 5, TimeUnit.MILLISECONDS);
1150	<	assertFalse(task.isCancelled());
1151	<	one.shutdown();
1152	<	assertFalse(task.isCancelled());
1153	<	assertFalse(one.isTerminated());
1154	<	assertTrue(one.isShutdown());
1155	<	Thread.sleep(SHORT_DELAY_MS);
1156	<	assertFalse(task.isCancelled());
545	<	task.cancel(true);
546	<	assertTrue(task.isCancelled());
547	<	Thread.sleep(SHORT_DELAY_MS);
548	<	assertTrue(one.isTerminated());
1144	>	/**
1145	>	* timed invokeAll(c) throws NPE if c has null elements
1146	>	*/
1147	>	public void testTimedInvokeAll3() throws Exception {
1148	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1149	>	try (PoolCleaner cleaner = cleaner(e)) {
1150	>	List<Callable<String>> l = new ArrayList<Callable<String>>();
1151	>	l.add(new StringTask());
1152	>	l.add(null);
1153	>	try {
1154	>	e.invokeAll(l, MEDIUM_DELAY_MS, MILLISECONDS);
1155	>	shouldThrow();
1156	>	} catch (NullPointerException success) {}
1157		}
1158	<	catch(Exception ex) {
1159	<	fail("unexpected exception");
1158	>	}
1159	>
1160	>	/**
1161	>	* get of element of invokeAll(c) throws exception on failed task
1162	>	*/
1163	>	public void testTimedInvokeAll4() throws Exception {
1164	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1165	>	try (PoolCleaner cleaner = cleaner(e)) {
1166	>	List<Callable<String>> l = new ArrayList<Callable<String>>();
1167	>	l.add(new NPETask());
1168	>	List<Future<String>> futures =
1169	>	e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS);
1170	>	assertEquals(1, futures.size());
1171	>	try {
1172	>	futures.get(0).get();
1173	>	shouldThrow();
1174	>	} catch (ExecutionException success) {
1175	>	assertTrue(success.getCause() instanceof NullPointerException);
1176	>	}
1177		}
1178	<	finally {
1179	<	one.shutdownNow();
1178	>	}
1179	>
1180	>	/**
1181	>	* timed invokeAll(c) returns results of all completed tasks
1182	>	*/
1183	>	public void testTimedInvokeAll5() throws Exception {
1184	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1185	>	try (PoolCleaner cleaner = cleaner(e)) {
1186	>	List<Callable<String>> l = new ArrayList<Callable<String>>();
1187	>	l.add(new StringTask());
1188	>	l.add(new StringTask());
1189	>	List<Future<String>> futures =
1190	>	e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS);
1191	>	assertEquals(2, futures.size());
1192	>	for (Future<String> future : futures)
1193	>	assertSame(TEST_STRING, future.get());
1194	>	}
1195	>	}
1196	>
1197	>	/**
1198	>	* timed invokeAll(c) cancels tasks not completed by timeout
1199	>	*/
1200	>	public void testTimedInvokeAll6() throws Exception {
1201	>	for (long timeout = timeoutMillis();;) {
1202	>	final CountDownLatch done = new CountDownLatch(1);
1203	>	final Callable<String> waiter = new CheckedCallable<String>() {
1204	>	public String realCall() {
1205	>	try { done.await(LONG_DELAY_MS, MILLISECONDS); }
1206	>	catch (InterruptedException ok) {}
1207	>	return "1"; }};
1208	>	final ExecutorService p = new ScheduledThreadPoolExecutor(2);
1209	>	try (PoolCleaner cleaner = cleaner(p, done)) {
1210	>	List<Callable<String>> tasks = new ArrayList<>();
1211	>	tasks.add(new StringTask("0"));
1212	>	tasks.add(waiter);
1213	>	tasks.add(new StringTask("2"));
1214	>	long startTime = System.nanoTime();
1215	>	List<Future<String>> futures =
1216	>	p.invokeAll(tasks, timeout, MILLISECONDS);
1217	>	assertEquals(tasks.size(), futures.size());
1218	>	assertTrue(millisElapsedSince(startTime) >= timeout);
1219	>	for (Future future : futures)
1220	>	assertTrue(future.isDone());
1221	>	assertTrue(futures.get(1).isCancelled());
1222	>	try {
1223	>	assertEquals("0", futures.get(0).get());
1224	>	assertEquals("2", futures.get(2).get());
1225	>	break;
1226	>	} catch (CancellationException retryWithLongerTimeout) {
1227	>	timeout *= 2;
1228	>	if (timeout >= LONG_DELAY_MS / 2)
1229	>	fail("expected exactly one task to be cancelled");
1230	>	}
1231	>	}
1232	>	}
1233	>	}
1234	>
1235	>	/**
1236	>	* A fixed delay task with overflowing period should not prevent a
1237	>	* one-shot task from executing.
1238	>	* https://bugs.openjdk.java.net/browse/JDK-8051859
1239	>	*/
1240	>	public void testScheduleWithFixedDelay_overflow() throws Exception {
1241	>	final CountDownLatch delayedDone = new CountDownLatch(1);
1242	>	final CountDownLatch immediateDone = new CountDownLatch(1);
1243	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
1244	>	try (PoolCleaner cleaner = cleaner(p)) {
1245	>	final Runnable immediate = new Runnable() { public void run() {
1246	>	immediateDone.countDown();
1247	>	}};
1248	>	final Runnable delayed = new Runnable() { public void run() {
1249	>	delayedDone.countDown();
1250	>	p.submit(immediate);
1251	>	}};
1252	>	p.scheduleWithFixedDelay(delayed, 0L, Long.MAX_VALUE, SECONDS);
1253	>	await(delayedDone);
1254	>	await(immediateDone);
1255		}
1256		}
1257

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