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

Comparing jsr166/src/test/tck/ScheduledExecutorTest.java (file contents):
Revision 1.6 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.86 by jsr166, Sat Mar 25 21:41:10 2017 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.*;
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.ExecutorService;
22	>	import java.util.concurrent.Future;
23	>	import java.util.concurrent.RejectedExecutionException;
24	>	import java.util.concurrent.ScheduledFuture;
25	>	import java.util.concurrent.ScheduledThreadPoolExecutor;
26	>	import java.util.concurrent.ThreadFactory;
27	>	import java.util.concurrent.ThreadPoolExecutor;
28	>	import java.util.concurrent.atomic.AtomicBoolean;
29	>	import java.util.concurrent.atomic.AtomicInteger;
30	>	import java.util.concurrent.atomic.AtomicLong;
31	>
32	>	import junit.framework.Test;
33	>	import junit.framework.TestSuite;
34
35		public class ScheduledExecutorTest extends JSR166TestCase {
36		public static void main(String[] args) {
37	<	junit.textui.TestRunner.run (suite());
37	>	main(suite(), args);
38		}
39		public static Test suite() {
40	<	return new TestSuite(ScheduledExecutorTest.class);
18	<	}
19	<
20	<	static class MyRunnable implements Runnable {
21	<	volatile boolean done = false;
22	<	public void run() {
23	<	try {
24	<	Thread.sleep(SMALL_DELAY_MS);
25	<	done = true;
26	<	} catch(Exception e){
27	<	}
28	<	}
29	<	}
30	<
31	<	static class MyCallable implements Callable {
32	<	volatile boolean done = false;
33	<	public Object call() {
34	<	try {
35	<	Thread.sleep(SMALL_DELAY_MS);
36	<	done = true;
37	<	} catch(Exception e){
38	<	}
39	<	return Boolean.TRUE;
40	<	}
40	>	return new TestSuite(ScheduledExecutorTest.class);
41		}
42
43		/**
44		* execute successfully executes a runnable
45		*/
46	<	public void testExecute() {
47	<	try {
48	<	MyRunnable runnable =new MyRunnable();
49	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
50	<	p1.execute(runnable);
51	<	assertFalse(runnable.done);
52	<	Thread.sleep(SHORT_DELAY_MS);
53	<	p1.shutdown();
54	<	try {
55	<	Thread.sleep(MEDIUM_DELAY_MS);
56	<	} catch(InterruptedException e){
57	<	unexpectedException();
58	<	}
59	<	assertTrue(runnable.done);
60	<	p1.shutdown();
61	<	joinPool(p1);
46	>	public void testExecute() throws InterruptedException {
47	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
48	>	try (PoolCleaner cleaner = cleaner(p)) {
49	>	final CountDownLatch done = new CountDownLatch(1);
50	>	final Runnable task = new CheckedRunnable() {
51	>	public void realRun() { done.countDown(); }};
52	>	p.execute(task);
53	>	await(done);
54		}
63	–	catch(Exception e){
64	–	unexpectedException();
65	–	}
66	–
55		}
56
69	–
57		/**
58		* delayed schedule of callable successfully executes after delay
59		*/
60	<	public void testSchedule1() {
61	<	try {
62	<	MyCallable callable = new MyCallable();
63	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
64	<	Future f = p1.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
65	<	assertFalse(callable.done);
66	<	Thread.sleep(MEDIUM_DELAY_MS);
67	<	assertTrue(callable.done);
68	<	assertEquals(Boolean.TRUE, f.get());
69	<	p1.shutdown();
70	<	joinPool(p1);
71	<	} catch(RejectedExecutionException e){}
72	<	catch(Exception e){
73	<	unexpectedException();
60	>	public void testSchedule1() throws Exception {
61	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
62	>	try (PoolCleaner cleaner = cleaner(p)) {
63	>	final long startTime = System.nanoTime();
64	>	final CountDownLatch done = new CountDownLatch(1);
65	>	Callable task = new CheckedCallable<Boolean>() {
66	>	public Boolean realCall() {
67	>	done.countDown();
68	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
69	>	return Boolean.TRUE;
70	>	}};
71	>	Future f = p.schedule(task, timeoutMillis(), MILLISECONDS);
72	>	assertSame(Boolean.TRUE, f.get());
73	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
74	>	assertTrue(done.await(0L, MILLISECONDS));
75		}
76		}
77
78		/**
79	<	*  delayed schedule of runnable successfully executes after delay
80	<	*/
81	<	public void testSchedule3() {
82	<	try {
83	<	MyRunnable runnable = new MyRunnable();
84	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
85	<	p1.schedule(runnable, SMALL_DELAY_MS, TimeUnit.MILLISECONDS);
86	<	Thread.sleep(SHORT_DELAY_MS);
87	<	assertFalse(runnable.done);
88	<	Thread.sleep(MEDIUM_DELAY_MS);
89	<	assertTrue(runnable.done);
90	<	p1.shutdown();
91	<	joinPool(p1);
92	<	} catch(Exception e){
93	<	unexpectedException();
79	>	* delayed schedule of runnable successfully executes after delay
80	>	*/
81	>	public void testSchedule3() throws Exception {
82	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
83	>	try (PoolCleaner cleaner = cleaner(p)) {
84	>	final long startTime = System.nanoTime();
85	>	final CountDownLatch done = new CountDownLatch(1);
86	>	Runnable task = new CheckedRunnable() {
87	>	public void realRun() {
88	>	done.countDown();
89	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
90	>	}};
91	>	Future f = p.schedule(task, timeoutMillis(), MILLISECONDS);
92	>	await(done);
93	>	assertNull(f.get(LONG_DELAY_MS, MILLISECONDS));
94	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
95		}
96		}
97	<
97	>
98		/**
99		* scheduleAtFixedRate executes runnable after given initial delay
100		*/
101	<	public void testSchedule4() {
102	<	try {
103	<	MyRunnable runnable = new MyRunnable();
104	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
105	<	ScheduledCancellable h = p1.scheduleAtFixedRate(runnable, SHORT_DELAY_MS, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
106	<	assertFalse(runnable.done);
107	<	Thread.sleep(MEDIUM_DELAY_MS);
108	<	assertTrue(runnable.done);
109	<	h.cancel(true);
110	<	p1.shutdown();
111	<	joinPool(p1);
112	<	} catch(Exception e){
113	<	unexpectedException();
101	>	public void testSchedule4() throws Exception {
102	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
103	>	try (PoolCleaner cleaner = cleaner(p)) {
104	>	final long startTime = System.nanoTime();
105	>	final CountDownLatch done = new CountDownLatch(1);
106	>	Runnable task = new CheckedRunnable() {
107	>	public void realRun() {
108	>	done.countDown();
109	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
110	>	}};
111	>	ScheduledFuture f =
112	>	p.scheduleAtFixedRate(task, timeoutMillis(),
113	>	LONG_DELAY_MS, MILLISECONDS);
114	>	await(done);
115	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
116	>	f.cancel(true);
117		}
118		}
119
120		/**
121		* scheduleWithFixedDelay executes runnable after given initial delay
122		*/
123	<	public void testSchedule5() {
124	<	try {
125	<	MyRunnable runnable = new MyRunnable();
126	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
127	<	ScheduledCancellable h = p1.scheduleWithFixedDelay(runnable, SHORT_DELAY_MS, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
128	<	assertFalse(runnable.done);
129	<	Thread.sleep(MEDIUM_DELAY_MS);
130	<	assertTrue(runnable.done);
131	<	h.cancel(true);
132	<	p1.shutdown();
133	<	joinPool(p1);
134	<	} catch(Exception e){
135	<	unexpectedException();
123	>	public void testSchedule5() throws Exception {
124	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
125	>	try (PoolCleaner cleaner = cleaner(p)) {
126	>	final long startTime = System.nanoTime();
127	>	final CountDownLatch done = new CountDownLatch(1);
128	>	Runnable task = new CheckedRunnable() {
129	>	public void realRun() {
130	>	done.countDown();
131	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
132	>	}};
133	>	ScheduledFuture f =
134	>	p.scheduleWithFixedDelay(task, timeoutMillis(),
135	>	LONG_DELAY_MS, MILLISECONDS);
136	>	await(done);
137	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
138	>	f.cancel(true);
139		}
140		}
141	<
141	>
142	>	static class RunnableCounter implements Runnable {
143	>	AtomicInteger count = new AtomicInteger(0);
144	>	public void run() { count.getAndIncrement(); }
145	>	}
146	>
147	>	/**
148	>	* scheduleAtFixedRate executes series of tasks at given rate.
149	>	* Eventually, it must hold that:
150	>	*   cycles - 1 <= elapsedMillis/delay < cycles
151	>	*/
152	>	public void testFixedRateSequence() throws InterruptedException {
153	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
154	>	try (PoolCleaner cleaner = cleaner(p)) {
155	>	for (int delay = 1; delay <= LONG_DELAY_MS; delay *= 3) {
156	>	final long startTime = System.nanoTime();
157	>	final int cycles = 8;
158	>	final CountDownLatch done = new CountDownLatch(cycles);
159	>	final Runnable task = new CheckedRunnable() {
160	>	public void realRun() { done.countDown(); }};
161	>	final ScheduledFuture periodicTask =
162	>	p.scheduleAtFixedRate(task, 0, delay, MILLISECONDS);
163	>	final int totalDelayMillis = (cycles - 1) * delay;
164	>	await(done, totalDelayMillis + LONG_DELAY_MS);
165	>	periodicTask.cancel(true);
166	>	final long elapsedMillis = millisElapsedSince(startTime);
167	>	assertTrue(elapsedMillis >= totalDelayMillis);
168	>	if (elapsedMillis <= cycles * delay)
169	>	return;
170	>	// else retry with longer delay
171	>	}
172	>	fail("unexpected execution rate");
173	>	}
174	>	}
175	>
176		/**
177	<	*  execute (null) throws NPE
177	>	* scheduleWithFixedDelay executes series of tasks with given period.
178	>	* Eventually, it must hold that each task starts at least delay and at
179	>	* most 2 * delay after the termination of the previous task.
180	>	*/
181	>	public void testFixedDelaySequence() throws InterruptedException {
182	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
183	>	try (PoolCleaner cleaner = cleaner(p)) {
184	>	for (int delay = 1; delay <= LONG_DELAY_MS; delay *= 3) {
185	>	final long startTime = System.nanoTime();
186	>	final AtomicLong previous = new AtomicLong(startTime);
187	>	final AtomicBoolean tryLongerDelay = new AtomicBoolean(false);
188	>	final int cycles = 8;
189	>	final CountDownLatch done = new CountDownLatch(cycles);
190	>	final int d = delay;
191	>	final Runnable task = new CheckedRunnable() {
192	>	public void realRun() {
193	>	long now = System.nanoTime();
194	>	long elapsedMillis
195	>	= NANOSECONDS.toMillis(now - previous.get());
196	>	if (done.getCount() == cycles) { // first execution
197	>	if (elapsedMillis >= d)
198	>	tryLongerDelay.set(true);
199	>	} else {
200	>	assertTrue(elapsedMillis >= d);
201	>	if (elapsedMillis >= 2 * d)
202	>	tryLongerDelay.set(true);
203	>	}
204	>	previous.set(now);
205	>	done.countDown();
206	>	}};
207	>	final ScheduledFuture periodicTask =
208	>	p.scheduleWithFixedDelay(task, 0, delay, MILLISECONDS);
209	>	final int totalDelayMillis = (cycles - 1) * delay;
210	>	await(done, totalDelayMillis + cycles * LONG_DELAY_MS);
211	>	periodicTask.cancel(true);
212	>	final long elapsedMillis = millisElapsedSince(startTime);
213	>	assertTrue(elapsedMillis >= totalDelayMillis);
214	>	if (!tryLongerDelay.get())
215	>	return;
216	>	// else retry with longer delay
217	>	}
218	>	fail("unexpected execution rate");
219	>	}
220	>	}
221	>
222	>	/**
223	>	* execute(null) throws NPE
224		*/
225	<	public void testExecuteNull() {
226	<	ScheduledExecutor se = null;
227	<	try {
228	<	se = new ScheduledExecutor(1);
229	<	se.execute(null);
230	<	shouldThrow();
231	<	} catch(NullPointerException success){}
157	<	catch(Exception e){
158	<	unexpectedException();
225	>	public void testExecuteNull() throws InterruptedException {
226	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
227	>	try (PoolCleaner cleaner = cleaner(p)) {
228	>	try {
229	>	p.execute(null);
230	>	shouldThrow();
231	>	} catch (NullPointerException success) {}
232		}
160	–
161	–	joinPool(se);
233		}
234
235		/**
236	<	* schedule (null) throws NPE
236	>	* schedule(null) throws NPE
237		*/
238	<	public void testScheduleNull() {
239	<	ScheduledExecutor se = new ScheduledExecutor(1);
240	<	try {
241	<	MyCallable callable = null;
242	<	Future f = se.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
243	<	shouldThrow();
244	<	} catch(NullPointerException success){}
245	<	catch(Exception e){
175	<	unexpectedException();
238	>	public void testScheduleNull() throws InterruptedException {
239	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
240	>	try (PoolCleaner cleaner = cleaner(p)) {
241	>	try {
242	>	TrackedCallable callable = null;
243	>	Future f = p.schedule(callable, SHORT_DELAY_MS, MILLISECONDS);
244	>	shouldThrow();
245	>	} catch (NullPointerException success) {}
246		}
177	–	joinPool(se);
247		}
248	<
248	>
249		/**
250		* execute throws RejectedExecutionException if shutdown
251		*/
252	<	public void testSchedule1_RejectedExecutionException() {
253	<	ScheduledExecutor se = new ScheduledExecutor(1);
254	<	try {
255	<	se.shutdown();
256	<	se.schedule(new NoOpRunnable(),
257	<	MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
258	<	shouldThrow();
259	<	} catch(RejectedExecutionException success){
252	>	public void testSchedule1_RejectedExecutionException() throws InterruptedException {
253	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
254	>	try (PoolCleaner cleaner = cleaner(p)) {
255	>	try {
256	>	p.shutdown();
257	>	p.schedule(new NoOpRunnable(),
258	>	MEDIUM_DELAY_MS, MILLISECONDS);
259	>	shouldThrow();
260	>	} catch (RejectedExecutionException success) {
261	>	} catch (SecurityException ok) {}
262		}
192	–	joinPool(se);
193	–
263		}
264
265		/**
266		* schedule throws RejectedExecutionException if shutdown
267		*/
268	<	public void testSchedule2_RejectedExecutionException() {
269	<	ScheduledExecutor se = new ScheduledExecutor(1);
270	<	try {
271	<	se.shutdown();
272	<	se.schedule(new NoOpCallable(),
273	<	MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
274	<	shouldThrow();
275	<	} catch(RejectedExecutionException success){
268	>	public void testSchedule2_RejectedExecutionException() throws InterruptedException {
269	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
270	>	try (PoolCleaner cleaner = cleaner(p)) {
271	>	try {
272	>	p.shutdown();
273	>	p.schedule(new NoOpCallable(),
274	>	MEDIUM_DELAY_MS, MILLISECONDS);
275	>	shouldThrow();
276	>	} catch (RejectedExecutionException success) {
277	>	} catch (SecurityException ok) {}
278		}
208	–	joinPool(se);
279		}
280
281		/**
282		* schedule callable throws RejectedExecutionException if shutdown
283		*/
284	<	public void testSchedule3_RejectedExecutionException() {
285	<	ScheduledExecutor se = new ScheduledExecutor(1);
286	<	try {
287	<	se.shutdown();
288	<	se.schedule(new NoOpCallable(),
289	<	MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
290	<	shouldThrow();
291	<	} catch(RejectedExecutionException success){
292	<	}
293	<	joinPool(se);
284	>	public void testSchedule3_RejectedExecutionException() throws InterruptedException {
285	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
286	>	try (PoolCleaner cleaner = cleaner(p)) {
287	>	try {
288	>	p.shutdown();
289	>	p.schedule(new NoOpCallable(),
290	>	MEDIUM_DELAY_MS, MILLISECONDS);
291	>	shouldThrow();
292	>	} catch (RejectedExecutionException success) {
293	>	} catch (SecurityException ok) {}
294	>	}
295		}
296
297		/**
298	<	*  scheduleAtFixedRate throws RejectedExecutionException if shutdown
298	>	* scheduleAtFixedRate throws RejectedExecutionException if shutdown
299		*/
300	<	public void testScheduleAtFixedRate1_RejectedExecutionException() {
301	<	ScheduledExecutor se = new ScheduledExecutor(1);
302	<	try {
303	<	se.shutdown();
304	<	se.scheduleAtFixedRate(new NoOpRunnable(),
305	<	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
306	<	shouldThrow();
307	<	} catch(RejectedExecutionException success){
308	<	}
309	<	joinPool(se);
300	>	public void testScheduleAtFixedRate1_RejectedExecutionException() throws InterruptedException {
301	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
302	>	try (PoolCleaner cleaner = cleaner(p)) {
303	>	try {
304	>	p.shutdown();
305	>	p.scheduleAtFixedRate(new NoOpRunnable(),
306	>	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, MILLISECONDS);
307	>	shouldThrow();
308	>	} catch (RejectedExecutionException success) {
309	>	} catch (SecurityException ok) {}
310	>	}
311		}
312	<
312	>
313		/**
314		* scheduleWithFixedDelay throws RejectedExecutionException if shutdown
315		*/
316	<	public void testScheduleWithFixedDelay1_RejectedExecutionException() {
317	<	ScheduledExecutor se = new ScheduledExecutor(1);
318	<	try {
319	<	se.shutdown();
320	<	se.scheduleWithFixedDelay(new NoOpRunnable(),
321	<	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
322	<	shouldThrow();
323	<	} catch(RejectedExecutionException success){
324	<	}
325	<	joinPool(se);
316	>	public void testScheduleWithFixedDelay1_RejectedExecutionException() throws InterruptedException {
317	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
318	>	try (PoolCleaner cleaner = cleaner(p)) {
319	>	try {
320	>	p.shutdown();
321	>	p.scheduleWithFixedDelay(new NoOpRunnable(),
322	>	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, MILLISECONDS);
323	>	shouldThrow();
324	>	} catch (RejectedExecutionException success) {
325	>	} catch (SecurityException ok) {}
326	>	}
327		}
328
329		/**
330	<	*  getActiveCount increases but doesn't overestimate, when a
331	<	*  thread becomes active
332	<	*/
333	<	public void testGetActiveCount() {
334	<	ScheduledExecutor p2 = new ScheduledExecutor(2);
335	<	assertEquals(0, p2.getActiveCount());
336	<	p2.execute(new SmallRunnable());
337	<	try {
338	<	Thread.sleep(SHORT_DELAY_MS);
339	<	} catch(Exception e){
340	<	unexpectedException();
341	<	}
342	<	assertEquals(1, p2.getActiveCount());
343	<	joinPool(p2);
344	<	}
345	<
346	<	/**
274	<	*    getCompletedTaskCount increases, but doesn't overestimate,
275	<	*   when tasks complete
276	<	*/
277	<	public void testGetCompletedTaskCount() {
278	<	ScheduledExecutor p2 = new ScheduledExecutor(2);
279	<	assertEquals(0, p2.getCompletedTaskCount());
280	<	p2.execute(new SmallRunnable());
281	<	try {
282	<	Thread.sleep(MEDIUM_DELAY_MS);
283	<	} catch(Exception e){
284	<	unexpectedException();
330	>	* getActiveCount increases but doesn't overestimate, when a
331	>	* thread becomes active
332	>	*/
333	>	public void testGetActiveCount() throws InterruptedException {
334	>	final CountDownLatch done = new CountDownLatch(1);
335	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(2);
336	>	try (PoolCleaner cleaner = cleaner(p, done)) {
337	>	final CountDownLatch threadStarted = new CountDownLatch(1);
338	>	assertEquals(0, p.getActiveCount());
339	>	p.execute(new CheckedRunnable() {
340	>	public void realRun() throws InterruptedException {
341	>	threadStarted.countDown();
342	>	assertEquals(1, p.getActiveCount());
343	>	await(done);
344	>	}});
345	>	await(threadStarted);
346	>	assertEquals(1, p.getActiveCount());
347		}
286	–	assertEquals(1, p2.getCompletedTaskCount());
287	–	joinPool(p2);
348		}
349	<
349	>
350		/**
351	<	*  getCorePoolSize returns size given in constructor if not otherwise set
351	>	* getCompletedTaskCount increases, but doesn't overestimate,
352	>	* when tasks complete
353	>	*/
354	>	public void testGetCompletedTaskCount() throws InterruptedException {
355	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(2);
356	>	try (PoolCleaner cleaner = cleaner(p)) {
357	>	final CountDownLatch threadStarted = new CountDownLatch(1);
358	>	final CountDownLatch threadProceed = new CountDownLatch(1);
359	>	final CountDownLatch threadDone = new CountDownLatch(1);
360	>	assertEquals(0, p.getCompletedTaskCount());
361	>	p.execute(new CheckedRunnable() {
362	>	public void realRun() throws InterruptedException {
363	>	threadStarted.countDown();
364	>	assertEquals(0, p.getCompletedTaskCount());
365	>	await(threadProceed);
366	>	threadDone.countDown();
367	>	}});
368	>	await(threadStarted);
369	>	assertEquals(0, p.getCompletedTaskCount());
370	>	threadProceed.countDown();
371	>	await(threadDone);
372	>	long startTime = System.nanoTime();
373	>	while (p.getCompletedTaskCount() != 1) {
374	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
375	>	fail("timed out");
376	>	Thread.yield();
377	>	}
378	>	}
379	>	}
380	>
381	>	/**
382	>	* getCorePoolSize returns size given in constructor if not otherwise set
383		*/
384	<	public void testGetCorePoolSize() {
385	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
386	<	assertEquals(1, p1.getCorePoolSize());
387	<	joinPool(p1);
384	>	public void testGetCorePoolSize() throws InterruptedException {
385	>	ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
386	>	try (PoolCleaner cleaner = cleaner(p)) {
387	>	assertEquals(1, p.getCorePoolSize());
388	>	}
389	>	}
390	>
391	>	/**
392	>	* getLargestPoolSize increases, but doesn't overestimate, when
393	>	* multiple threads active
394	>	*/
395	>	public void testGetLargestPoolSize() throws InterruptedException {
396	>	final int THREADS = 3;
397	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(THREADS);
398	>	final CountDownLatch threadsStarted = new CountDownLatch(THREADS);
399	>	final CountDownLatch done = new CountDownLatch(1);
400	>	try (PoolCleaner cleaner = cleaner(p, done)) {
401	>	assertEquals(0, p.getLargestPoolSize());
402	>	for (int i = 0; i < THREADS; i++)
403	>	p.execute(new CheckedRunnable() {
404	>	public void realRun() throws InterruptedException {
405	>	threadsStarted.countDown();
406	>	await(done);
407	>	assertEquals(THREADS, p.getLargestPoolSize());
408	>	}});
409	>	await(threadsStarted);
410	>	assertEquals(THREADS, p.getLargestPoolSize());
411	>	}
412	>	assertEquals(THREADS, p.getLargestPoolSize());
413	>	}
414	>
415	>	/**
416	>	* getPoolSize increases, but doesn't overestimate, when threads
417	>	* become active
418	>	*/
419	>	public void testGetPoolSize() throws InterruptedException {
420	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
421	>	final CountDownLatch threadStarted = new CountDownLatch(1);
422	>	final CountDownLatch done = new CountDownLatch(1);
423	>	try (PoolCleaner cleaner = cleaner(p, done)) {
424	>	assertEquals(0, p.getPoolSize());
425	>	p.execute(new CheckedRunnable() {
426	>	public void realRun() throws InterruptedException {
427	>	threadStarted.countDown();
428	>	assertEquals(1, p.getPoolSize());
429	>	await(done);
430	>	}});
431	>	await(threadStarted);
432	>	assertEquals(1, p.getPoolSize());
433	>	}
434	>	}
435	>
436	>	/**
437	>	* getTaskCount increases, but doesn't overestimate, when tasks
438	>	* submitted
439	>	*/
440	>	public void testGetTaskCount() throws InterruptedException {
441	>	final int TASKS = 3;
442	>	final CountDownLatch done = new CountDownLatch(1);
443	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
444	>	try (PoolCleaner cleaner = cleaner(p, done)) {
445	>	final CountDownLatch threadStarted = new CountDownLatch(1);
446	>	assertEquals(0, p.getTaskCount());
447	>	assertEquals(0, p.getCompletedTaskCount());
448	>	p.execute(new CheckedRunnable() {
449	>	public void realRun() throws InterruptedException {
450	>	threadStarted.countDown();
451	>	await(done);
452	>	}});
453	>	await(threadStarted);
454	>	assertEquals(1, p.getTaskCount());
455	>	assertEquals(0, p.getCompletedTaskCount());
456	>	for (int i = 0; i < TASKS; i++) {
457	>	assertEquals(1 + i, p.getTaskCount());
458	>	p.execute(new CheckedRunnable() {
459	>	public void realRun() throws InterruptedException {
460	>	threadStarted.countDown();
461	>	assertEquals(1 + TASKS, p.getTaskCount());
462	>	await(done);
463	>	}});
464	>	}
465	>	assertEquals(1 + TASKS, p.getTaskCount());
466	>	assertEquals(0, p.getCompletedTaskCount());
467	>	}
468	>	assertEquals(1 + TASKS, p.getTaskCount());
469	>	assertEquals(1 + TASKS, p.getCompletedTaskCount());
470		}
471	<
471	>
472		/**
473	<	*    getLargestPoolSize increases, but doesn't overestimate, when
301	<	*   multiple threads active
473	>	* getThreadFactory returns factory in constructor if not set
474		*/
475	<	public void testGetLargestPoolSize() {
476	<	ScheduledExecutor p2 = new ScheduledExecutor(2);
477	<	assertEquals(0, p2.getLargestPoolSize());
478	<	p2.execute(new SmallRunnable());
479	<	p2.execute(new SmallRunnable());
480	<	try {
481	<	Thread.sleep(SHORT_DELAY_MS);
482	<	} catch(Exception e){
483	<	unexpectedException();
484	<	}
485	<	assertEquals(2, p2.getLargestPoolSize());
486	<	joinPool(p2);
487	<	}
488	<
489	<	/**
490	<	*   getPoolSize increases, but doesn't overestimate, when threads
491	<	*   become active
492	<	*/
321	<	public void testGetPoolSize() {
322	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
323	<	assertEquals(0, p1.getPoolSize());
324	<	p1.execute(new SmallRunnable());
325	<	assertEquals(1, p1.getPoolSize());
326	<	joinPool(p1);
327	<	}
328	<
329	<	/**
330	<	*    getTaskCount increases, but doesn't overestimate, when tasks
331	<	*    submitted
332	<	*/
333	<	public void testGetTaskCount() {
334	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
335	<	assertEquals(0, p1.getTaskCount());
336	<	for(int i = 0; i < 5; i++)
337	<	p1.execute(new SmallRunnable());
338	<	try {
339	<	Thread.sleep(SHORT_DELAY_MS);
340	<	} catch(Exception e){
341	<	unexpectedException();
475	>	public void testGetThreadFactory() throws InterruptedException {
476	>	final ThreadFactory threadFactory = new SimpleThreadFactory();
477	>	final ScheduledThreadPoolExecutor p =
478	>	new ScheduledThreadPoolExecutor(1, threadFactory);
479	>	try (PoolCleaner cleaner = cleaner(p)) {
480	>	assertSame(threadFactory, p.getThreadFactory());
481	>	}
482	>	}
483	>
484	>	/**
485	>	* setThreadFactory sets the thread factory returned by getThreadFactory
486	>	*/
487	>	public void testSetThreadFactory() throws InterruptedException {
488	>	ThreadFactory threadFactory = new SimpleThreadFactory();
489	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
490	>	try (PoolCleaner cleaner = cleaner(p)) {
491	>	p.setThreadFactory(threadFactory);
492	>	assertSame(threadFactory, p.getThreadFactory());
493		}
343	–	assertEquals(5, p1.getTaskCount());
344	–	joinPool(p1);
494		}
495	<
495	>
496		/**
497	<	*   is isShutDown is false before shutdown, true after
497	>	* setThreadFactory(null) throws NPE
498	>	*/
499	>	public void testSetThreadFactoryNull() throws InterruptedException {
500	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
501	>	try (PoolCleaner cleaner = cleaner(p)) {
502	>	try {
503	>	p.setThreadFactory(null);
504	>	shouldThrow();
505	>	} catch (NullPointerException success) {}
506	>	}
507	>	}
508	>
509	>	/**
510	>	* The default rejected execution handler is AbortPolicy.
511	>	*/
512	>	public void testDefaultRejectedExecutionHandler() {
513	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
514	>	try (PoolCleaner cleaner = cleaner(p)) {
515	>	assertTrue(p.getRejectedExecutionHandler()
516	>	instanceof ThreadPoolExecutor.AbortPolicy);
517	>	}
518	>	}
519	>
520	>	/**
521	>	* isShutdown is false before shutdown, true after
522		*/
523		public void testIsShutdown() {
524	<
525	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
524	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
525	>	assertFalse(p.isShutdown());
526	>	try (PoolCleaner cleaner = cleaner(p)) {
527	>	try {
528	>	p.shutdown();
529	>	assertTrue(p.isShutdown());
530	>	} catch (SecurityException ok) {}
531	>	}
532	>	}
533	>
534	>	/**
535	>	* isTerminated is false before termination, true after
536	>	*/
537	>	public void testIsTerminated() throws InterruptedException {
538	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
539	>	try (PoolCleaner cleaner = cleaner(p)) {
540	>	final CountDownLatch threadStarted = new CountDownLatch(1);
541	>	final CountDownLatch done = new CountDownLatch(1);
542	>	assertFalse(p.isTerminated());
543	>	p.execute(new CheckedRunnable() {
544	>	public void realRun() throws InterruptedException {
545	>	assertFalse(p.isTerminated());
546	>	threadStarted.countDown();
547	>	await(done);
548	>	}});
549	>	await(threadStarted);
550	>	assertFalse(p.isTerminating());
551	>	done.countDown();
552	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
553	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
554	>	assertTrue(p.isTerminated());
555	>	}
556	>	}
557	>
558	>	/**
559	>	* isTerminating is not true when running or when terminated
560	>	*/
561	>	public void testIsTerminating() throws InterruptedException {
562	>	final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
563	>	final CountDownLatch threadStarted = new CountDownLatch(1);
564	>	final CountDownLatch done = new CountDownLatch(1);
565	>	try (PoolCleaner cleaner = cleaner(p)) {
566	>	assertFalse(p.isTerminating());
567	>	p.execute(new CheckedRunnable() {
568	>	public void realRun() throws InterruptedException {
569	>	assertFalse(p.isTerminating());
570	>	threadStarted.countDown();
571	>	await(done);
572	>	}});
573	>	await(threadStarted);
574	>	assertFalse(p.isTerminating());
575	>	done.countDown();
576	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
577	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
578	>	assertTrue(p.isTerminated());
579	>	assertFalse(p.isTerminating());
580	>	}
581	>	}
582	>
583	>	/**
584	>	* getQueue returns the work queue, which contains queued tasks
585	>	*/
586	>	public void testGetQueue() throws InterruptedException {
587	>	final CountDownLatch done = new CountDownLatch(1);
588	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
589	>	try (PoolCleaner cleaner = cleaner(p, done)) {
590	>	final CountDownLatch threadStarted = new CountDownLatch(1);
591	>	ScheduledFuture[] tasks = new ScheduledFuture[5];
592	>	for (int i = 0; i < tasks.length; i++) {
593	>	Runnable r = new CheckedRunnable() {
594	>	public void realRun() throws InterruptedException {
595	>	threadStarted.countDown();
596	>	await(done);
597	>	}};
598	>	tasks[i] = p.schedule(r, 1, MILLISECONDS);
599	>	}
600	>	await(threadStarted);
601	>	BlockingQueue<Runnable> q = p.getQueue();
602	>	assertTrue(q.contains(tasks[tasks.length - 1]));
603	>	assertFalse(q.contains(tasks[0]));
604	>	}
605	>	}
606	>
607	>	/**
608	>	* remove(task) removes queued task, and fails to remove active task
609	>	*/
610	>	public void testRemove() throws InterruptedException {
611	>	final CountDownLatch done = new CountDownLatch(1);
612	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
613	>	try (PoolCleaner cleaner = cleaner(p, done)) {
614	>	ScheduledFuture[] tasks = new ScheduledFuture[5];
615	>	final CountDownLatch threadStarted = new CountDownLatch(1);
616	>	for (int i = 0; i < tasks.length; i++) {
617	>	Runnable r = new CheckedRunnable() {
618	>	public void realRun() throws InterruptedException {
619	>	threadStarted.countDown();
620	>	await(done);
621	>	}};
622	>	tasks[i] = p.schedule(r, 1, MILLISECONDS);
623	>	}
624	>	await(threadStarted);
625	>	BlockingQueue<Runnable> q = p.getQueue();
626	>	assertFalse(p.remove((Runnable)tasks[0]));
627	>	assertTrue(q.contains((Runnable)tasks[4]));
628	>	assertTrue(q.contains((Runnable)tasks[3]));
629	>	assertTrue(p.remove((Runnable)tasks[4]));
630	>	assertFalse(p.remove((Runnable)tasks[4]));
631	>	assertFalse(q.contains((Runnable)tasks[4]));
632	>	assertTrue(q.contains((Runnable)tasks[3]));
633	>	assertTrue(p.remove((Runnable)tasks[3]));
634	>	assertFalse(q.contains((Runnable)tasks[3]));
635	>	}
636	>	}
637	>
638	>	/**
639	>	* purge eventually removes cancelled tasks from the queue
640	>	*/
641	>	public void testPurge() throws InterruptedException {
642	>	final ScheduledFuture[] tasks = new ScheduledFuture[5];
643	>	final Runnable releaser = new Runnable() { public void run() {
644	>	for (ScheduledFuture task : tasks)
645	>	if (task != null) task.cancel(true); }};
646	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
647	>	try (PoolCleaner cleaner = cleaner(p, releaser)) {
648	>	for (int i = 0; i < tasks.length; i++)
649	>	tasks[i] = p.schedule(new SmallPossiblyInterruptedRunnable(),
650	>	LONG_DELAY_MS, MILLISECONDS);
651	>	int max = tasks.length;
652	>	if (tasks[4].cancel(true)) --max;
653	>	if (tasks[3].cancel(true)) --max;
654	>	// There must eventually be an interference-free point at
655	>	// which purge will not fail. (At worst, when queue is empty.)
656	>	long startTime = System.nanoTime();
657	>	do {
658	>	p.purge();
659	>	long count = p.getTaskCount();
660	>	if (count == max)
661	>	return;
662	>	} while (millisElapsedSince(startTime) < LONG_DELAY_MS);
663	>	fail("Purge failed to remove cancelled tasks");
664	>	}
665	>	}
666	>
667	>	/**
668	>	* shutdownNow returns a list containing tasks that were not run,
669	>	* and those tasks are drained from the queue
670	>	*/
671	>	public void testShutdownNow() throws InterruptedException {
672	>	final int poolSize = 2;
673	>	final int count = 5;
674	>	final AtomicInteger ran = new AtomicInteger(0);
675	>	final ScheduledThreadPoolExecutor p =
676	>	new ScheduledThreadPoolExecutor(poolSize);
677	>	final CountDownLatch threadsStarted = new CountDownLatch(poolSize);
678	>	Runnable waiter = new CheckedRunnable() { public void realRun() {
679	>	threadsStarted.countDown();
680	>	try {
681	>	MILLISECONDS.sleep(2 * LONG_DELAY_MS);
682	>	} catch (InterruptedException success) {}
683	>	ran.getAndIncrement();
684	>	}};
685	>	for (int i = 0; i < count; i++)
686	>	p.execute(waiter);
687	>	await(threadsStarted);
688	>	assertEquals(poolSize, p.getActiveCount());
689	>	assertEquals(0, p.getCompletedTaskCount());
690	>	final List<Runnable> queuedTasks;
691		try {
692	<	assertFalse(p1.isShutdown());
692	>	queuedTasks = p.shutdownNow();
693	>	} catch (SecurityException ok) {
694	>	return; // Allowed in case test doesn't have privs
695	>	}
696	>	assertTrue(p.isShutdown());
697	>	assertTrue(p.getQueue().isEmpty());
698	>	assertEquals(count - poolSize, queuedTasks.size());
699	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
700	>	assertTrue(p.isTerminated());
701	>	assertEquals(poolSize, ran.get());
702	>	assertEquals(poolSize, p.getCompletedTaskCount());
703	>	}
704	>
705	>	/**
706	>	* shutdownNow returns a list containing tasks that were not run,
707	>	* and those tasks are drained from the queue
708	>	*/
709	>	public void testShutdownNow_delayedTasks() throws InterruptedException {
710	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
711	>	List<ScheduledFuture> tasks = new ArrayList<>();
712	>	for (int i = 0; i < 3; i++) {
713	>	Runnable r = new NoOpRunnable();
714	>	tasks.add(p.schedule(r, 9, SECONDS));
715	>	tasks.add(p.scheduleAtFixedRate(r, 9, 9, SECONDS));
716	>	tasks.add(p.scheduleWithFixedDelay(r, 9, 9, SECONDS));
717	>	}
718	>	if (testImplementationDetails)
719	>	assertEquals(new HashSet(tasks), new HashSet(p.getQueue()));
720	>	final List<Runnable> queuedTasks;
721	>	try {
722	>	queuedTasks = p.shutdownNow();
723	>	} catch (SecurityException ok) {
724	>	return; // Allowed in case test doesn't have privs
725	>	}
726	>	assertTrue(p.isShutdown());
727	>	assertTrue(p.getQueue().isEmpty());
728	>	if (testImplementationDetails)
729	>	assertEquals(new HashSet(tasks), new HashSet(queuedTasks));
730	>	assertEquals(tasks.size(), queuedTasks.size());
731	>	for (ScheduledFuture task : tasks) {
732	>	assertFalse(task.isDone());
733	>	assertFalse(task.isCancelled());
734		}
735	<	finally {
736	<	p1.shutdown();
735	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
736	>	assertTrue(p.isTerminated());
737	>	}
738	>
739	>	/**
740	>	* By default, periodic tasks are cancelled at shutdown.
741	>	* By default, delayed tasks keep running after shutdown.
742	>	* Check that changing the default values work:
743	>	* - setExecuteExistingDelayedTasksAfterShutdownPolicy
744	>	* - setContinueExistingPeriodicTasksAfterShutdownPolicy
745	>	*/
746	>	public void testShutdown_cancellation() throws Exception {
747	>	Boolean[] allBooleans = { null, Boolean.FALSE, Boolean.TRUE };
748	>	for (Boolean policy : allBooleans)
749	>	{
750	>	final int poolSize = 2;
751	>	final ScheduledThreadPoolExecutor p
752	>	= new ScheduledThreadPoolExecutor(poolSize);
753	>	final boolean effectiveDelayedPolicy = (policy != Boolean.FALSE);
754	>	final boolean effectivePeriodicPolicy = (policy == Boolean.TRUE);
755	>	final boolean effectiveRemovePolicy = (policy == Boolean.TRUE);
756	>	if (policy != null) {
757	>	p.setExecuteExistingDelayedTasksAfterShutdownPolicy(policy);
758	>	p.setContinueExistingPeriodicTasksAfterShutdownPolicy(policy);
759	>	p.setRemoveOnCancelPolicy(policy);
760	>	}
761	>	assertEquals(effectiveDelayedPolicy,
762	>	p.getExecuteExistingDelayedTasksAfterShutdownPolicy());
763	>	assertEquals(effectivePeriodicPolicy,
764	>	p.getContinueExistingPeriodicTasksAfterShutdownPolicy());
765	>	assertEquals(effectiveRemovePolicy,
766	>	p.getRemoveOnCancelPolicy());
767	>	// Strategy: Wedge the pool with poolSize "blocker" threads
768	>	final AtomicInteger ran = new AtomicInteger(0);
769	>	final CountDownLatch poolBlocked = new CountDownLatch(poolSize);
770	>	final CountDownLatch unblock = new CountDownLatch(1);
771	>	final CountDownLatch periodicLatch1 = new CountDownLatch(2);
772	>	final CountDownLatch periodicLatch2 = new CountDownLatch(2);
773	>	Runnable task = new CheckedRunnable() { public void realRun()
774	>	throws InterruptedException {
775	>	poolBlocked.countDown();
776	>	await(unblock);
777	>	ran.getAndIncrement();
778	>	}};
779	>	List<Future<?>> blockers = new ArrayList<>();
780	>	List<Future<?>> periodics = new ArrayList<>();
781	>	List<Future<?>> delayeds = new ArrayList<>();
782	>	for (int i = 0; i < poolSize; i++)
783	>	blockers.add(p.submit(task));
784	>	await(poolBlocked);
785	>
786	>	periodics.add(p.scheduleAtFixedRate(countDowner(periodicLatch1),
787	>	1, 1, MILLISECONDS));
788	>	periodics.add(p.scheduleWithFixedDelay(countDowner(periodicLatch2),
789	>	1, 1, MILLISECONDS));
790	>	delayeds.add(p.schedule(task, 1, MILLISECONDS));
791	>
792	>	assertTrue(p.getQueue().containsAll(periodics));
793	>	assertTrue(p.getQueue().containsAll(delayeds));
794	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
795	>	assertTrue(p.isShutdown());
796	>	assertFalse(p.isTerminated());
797	>	for (Future<?> periodic : periodics) {
798	>	assertTrue(effectivePeriodicPolicy ^ periodic.isCancelled());
799	>	assertTrue(effectivePeriodicPolicy ^ periodic.isDone());
800	>	}
801	>	for (Future<?> delayed : delayeds) {
802	>	assertTrue(effectiveDelayedPolicy ^ delayed.isCancelled());
803	>	assertTrue(effectiveDelayedPolicy ^ delayed.isDone());
804	>	}
805	>	if (testImplementationDetails) {
806	>	assertEquals(effectivePeriodicPolicy,
807	>	p.getQueue().containsAll(periodics));
808	>	assertEquals(effectiveDelayedPolicy,
809	>	p.getQueue().containsAll(delayeds));
810	>	}
811	>	// Release all pool threads
812	>	unblock.countDown();
813	>
814	>	for (Future<?> delayed : delayeds) {
815	>	if (effectiveDelayedPolicy) {
816	>	assertNull(delayed.get());
817	>	}
818	>	}
819	>	if (effectivePeriodicPolicy) {
820	>	await(periodicLatch1);
821	>	await(periodicLatch2);
822	>	for (Future<?> periodic : periodics) {
823	>	assertTrue(periodic.cancel(false));
824	>	assertTrue(periodic.isCancelled());
825	>	assertTrue(periodic.isDone());
826	>	}
827	>	}
828	>	for (Future<?> blocker : blockers) assertNull(blocker.get());
829	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
830	>	assertTrue(p.isTerminated());
831	>	assertEquals(2 + (effectiveDelayedPolicy ? 1 : 0), ran.get());
832	>	}}
833	>
834	>	/**
835	>	* completed submit of callable returns result
836	>	*/
837	>	public void testSubmitCallable() throws Exception {
838	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
839	>	try (PoolCleaner cleaner = cleaner(e)) {
840	>	Future<String> future = e.submit(new StringTask());
841	>	String result = future.get();
842	>	assertSame(TEST_STRING, result);
843		}
359	–	assertTrue(p1.isShutdown());
844		}
845
362	–
846		/**
847	<	*   isTerminated is false before termination, true after
847	>	* completed submit of runnable returns successfully
848		*/
849	<	public void testIsTerminated() {
850	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
851	<	try {
852	<	p1.execute(new SmallRunnable());
853	<	} finally {
854	<	p1.shutdown();
849	>	public void testSubmitRunnable() throws Exception {
850	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
851	>	try (PoolCleaner cleaner = cleaner(e)) {
852	>	Future<?> future = e.submit(new NoOpRunnable());
853	>	future.get();
854	>	assertTrue(future.isDone());
855		}
373	–	try {
374	–	assertTrue(p1.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
375	–	assertTrue(p1.isTerminated());
376	–	} catch(Exception e){
377	–	unexpectedException();
378	–	}
856		}
857
858		/**
859	<	*  isTerminating is not true when running or when terminated
859	>	* completed submit of (runnable, result) returns result
860		*/
861	<	public void testIsTerminating() {
862	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
863	<	assertFalse(p1.isTerminating());
864	<	try {
865	<	p1.execute(new SmallRunnable());
866	<	assertFalse(p1.isTerminating());
390	<	} finally {
391	<	p1.shutdown();
861	>	public void testSubmitRunnable2() throws Exception {
862	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
863	>	try (PoolCleaner cleaner = cleaner(e)) {
864	>	Future<String> future = e.submit(new NoOpRunnable(), TEST_STRING);
865	>	String result = future.get();
866	>	assertSame(TEST_STRING, result);
867		}
393	–	try {
394	–	assertTrue(p1.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
395	–	assertTrue(p1.isTerminated());
396	–	assertFalse(p1.isTerminating());
397	–	} catch(Exception e){
398	–	unexpectedException();
399	–	}
868		}
869
870		/**
871	<	*   purge removes cancelled tasks from the queue
871	>	* invokeAny(null) throws NPE
872		*/
873	<	public void testPurge() {
874	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
875	<	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
876	<	for(int i = 0; i < 5; i++){
877	<	tasks[i] = p1.schedule(new SmallRunnable(), 1, TimeUnit.MILLISECONDS);
873	>	public void testInvokeAny1() throws Exception {
874	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
875	>	try (PoolCleaner cleaner = cleaner(e)) {
876	>	try {
877	>	e.invokeAny(null);
878	>	shouldThrow();
879	>	} catch (NullPointerException success) {}
880		}
411	–	int max = 5;
412	–	if (tasks[4].cancel(true)) --max;
413	–	if (tasks[3].cancel(true)) --max;
414	–	p1.purge();
415	–	long count = p1.getTaskCount();
416	–	assertTrue(count > 0 && count <= max);
417	–	joinPool(p1);
881		}
882
883		/**
884	<	*  shutDownNow returns a list containing tasks that were not run
884	>	* invokeAny(empty collection) throws IAE
885		*/
886	<	public void testShutDownNow() {
887	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
888	<	for(int i = 0; i < 5; i++)
889	<	p1.schedule(new SmallRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
890	<	List l = p1.shutdownNow();
891	<	assertTrue(p1.isShutdown());
892	<	assertTrue(l.size() > 0 && l.size() <= 5);
893	<	joinPool(p1);
886	>	public void testInvokeAny2() throws Exception {
887	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
888	>	try (PoolCleaner cleaner = cleaner(e)) {
889	>	try {
890	>	e.invokeAny(new ArrayList<Callable<String>>());
891	>	shouldThrow();
892	>	} catch (IllegalArgumentException success) {}
893	>	}
894		}
895
896		/**
897	<	* In default setting, shutdown cancels periodic but not delayed
435	<	* tasks at shutdown
897	>	* invokeAny(c) throws NPE if c has null elements
898		*/
899	<	public void testShutDown1() {
900	<	try {
901	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
902	<	assertTrue(p1.getExecuteExistingDelayedTasksAfterShutdownPolicy());
903	<	assertFalse(p1.getContinueExistingPeriodicTasksAfterShutdownPolicy());
899	>	public void testInvokeAny3() throws Exception {
900	>	CountDownLatch latch = new CountDownLatch(1);
901	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
902	>	try (PoolCleaner cleaner = cleaner(e)) {
903	>	List<Callable<String>> l = new ArrayList<>();
904	>	l.add(latchAwaitingStringTask(latch));
905	>	l.add(null);
906	>	try {
907	>	e.invokeAny(l);
908	>	shouldThrow();
909	>	} catch (NullPointerException success) {}
910	>	latch.countDown();
911	>	}
912	>	}
913
914	<	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
915	<	for(int i = 0; i < 5; i++)
916	<	tasks[i] = p1.schedule(new NoOpRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
917	<	p1.shutdown();
918	<	BlockingQueue q = p1.getQueue();
919	<	for (Iterator it = q.iterator(); it.hasNext();) {
920	<	ScheduledCancellable t = (ScheduledCancellable)it.next();
921	<	assertFalse(t.isCancelled());
914	>	/**
915	>	* invokeAny(c) throws ExecutionException if no task completes
916	>	*/
917	>	public void testInvokeAny4() throws Exception {
918	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
919	>	try (PoolCleaner cleaner = cleaner(e)) {
920	>	List<Callable<String>> l = new ArrayList<>();
921	>	l.add(new NPETask());
922	>	try {
923	>	e.invokeAny(l);
924	>	shouldThrow();
925	>	} catch (ExecutionException success) {
926	>	assertTrue(success.getCause() instanceof NullPointerException);
927		}
928	<	assertTrue(p1.isShutdown());
929	<	Thread.sleep(SMALL_DELAY_MS);
930	<	for (int i = 0; i < 5; ++i) {
931	<	assertTrue(tasks[i].isDone());
932	<	assertFalse(tasks[i].isCancelled());
928	>	}
929	>	}
930	>
931	>	/**
932	>	* invokeAny(c) returns result of some task
933	>	*/
934	>	public void testInvokeAny5() throws Exception {
935	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
936	>	try (PoolCleaner cleaner = cleaner(e)) {
937	>	List<Callable<String>> l = new ArrayList<>();
938	>	l.add(new StringTask());
939	>	l.add(new StringTask());
940	>	String result = e.invokeAny(l);
941	>	assertSame(TEST_STRING, result);
942	>	}
943	>	}
944	>
945	>	/**
946	>	* invokeAll(null) throws NPE
947	>	*/
948	>	public void testInvokeAll1() throws Exception {
949	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
950	>	try (PoolCleaner cleaner = cleaner(e)) {
951	>	try {
952	>	e.invokeAll(null);
953	>	shouldThrow();
954	>	} catch (NullPointerException success) {}
955	>	}
956	>	}
957	>
958	>	/**
959	>	* invokeAll(empty collection) returns empty collection
960	>	*/
961	>	public void testInvokeAll2() throws Exception {
962	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
963	>	try (PoolCleaner cleaner = cleaner(e)) {
964	>	List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>());
965	>	assertTrue(r.isEmpty());
966	>	}
967	>	}
968	>
969	>	/**
970	>	* invokeAll(c) throws NPE if c has null elements
971	>	*/
972	>	public void testInvokeAll3() throws Exception {
973	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
974	>	try (PoolCleaner cleaner = cleaner(e)) {
975	>	List<Callable<String>> l = new ArrayList<>();
976	>	l.add(new StringTask());
977	>	l.add(null);
978	>	try {
979	>	e.invokeAll(l);
980	>	shouldThrow();
981	>	} catch (NullPointerException success) {}
982	>	}
983	>	}
984	>
985	>	/**
986	>	* get of invokeAll(c) throws exception on failed task
987	>	*/
988	>	public void testInvokeAll4() throws Exception {
989	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
990	>	try (PoolCleaner cleaner = cleaner(e)) {
991	>	List<Callable<String>> l = new ArrayList<>();
992	>	l.add(new NPETask());
993	>	List<Future<String>> futures = e.invokeAll(l);
994	>	assertEquals(1, futures.size());
995	>	try {
996	>	futures.get(0).get();
997	>	shouldThrow();
998	>	} catch (ExecutionException success) {
999	>	assertTrue(success.getCause() instanceof NullPointerException);
1000		}
458	–
1001		}
1002	<	catch(Exception ex) {
1003	<	unexpectedException();
1002	>	}
1003	>
1004	>	/**
1005	>	* invokeAll(c) returns results of all completed tasks
1006	>	*/
1007	>	public void testInvokeAll5() throws Exception {
1008	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1009	>	try (PoolCleaner cleaner = cleaner(e)) {
1010	>	List<Callable<String>> l = new ArrayList<>();
1011	>	l.add(new StringTask());
1012	>	l.add(new StringTask());
1013	>	List<Future<String>> futures = e.invokeAll(l);
1014	>	assertEquals(2, futures.size());
1015	>	for (Future<String> future : futures)
1016	>	assertSame(TEST_STRING, future.get());
1017		}
1018		}
1019
1020	+	/**
1021	+	* timed invokeAny(null) throws NPE
1022	+	*/
1023	+	public void testTimedInvokeAny1() throws Exception {
1024	+	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1025	+	try (PoolCleaner cleaner = cleaner(e)) {
1026	+	try {
1027	+	e.invokeAny(null, MEDIUM_DELAY_MS, MILLISECONDS);
1028	+	shouldThrow();
1029	+	} catch (NullPointerException success) {}
1030	+	}
1031	+	}
1032
1033		/**
1034	<	* If setExecuteExistingDelayedTasksAfterShutdownPolicy is false,
468	<	* delayed tasks are cancelled at shutdown
1034	>	* timed invokeAny(,,null) throws NPE
1035		*/
1036	<	public void testShutDown2() {
1037	<	try {
1038	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
1039	<	p1.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
1040	<	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
1041	<	for(int i = 0; i < 5; i++)
1042	<	tasks[i] = p1.schedule(new NoOpRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
1043	<	p1.shutdown();
1044	<	assertTrue(p1.isShutdown());
1045	<	BlockingQueue q = p1.getQueue();
1046	<	assertTrue(q.isEmpty());
1047	<	Thread.sleep(SMALL_DELAY_MS);
1048	<	assertTrue(p1.isTerminated());
1036	>	public void testTimedInvokeAnyNullTimeUnit() throws Exception {
1037	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1038	>	try (PoolCleaner cleaner = cleaner(e)) {
1039	>	List<Callable<String>> l = new ArrayList<>();
1040	>	l.add(new StringTask());
1041	>	try {
1042	>	e.invokeAny(l, MEDIUM_DELAY_MS, null);
1043	>	shouldThrow();
1044	>	} catch (NullPointerException success) {}
1045	>	}
1046	>	}
1047	>
1048	>	/**
1049	>	* timed invokeAny(empty collection) throws IAE
1050	>	*/
1051	>	public void testTimedInvokeAny2() throws Exception {
1052	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1053	>	try (PoolCleaner cleaner = cleaner(e)) {
1054	>	try {
1055	>	e.invokeAny(new ArrayList<Callable<String>>(), MEDIUM_DELAY_MS, MILLISECONDS);
1056	>	shouldThrow();
1057	>	} catch (IllegalArgumentException success) {}
1058		}
1059	<	catch(Exception ex) {
1060	<	unexpectedException();
1059	>	}
1060	>
1061	>	/**
1062	>	* timed invokeAny(c) throws NPE if c has null elements
1063	>	*/
1064	>	public void testTimedInvokeAny3() throws Exception {
1065	>	CountDownLatch latch = new CountDownLatch(1);
1066	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1067	>	try (PoolCleaner cleaner = cleaner(e)) {
1068	>	List<Callable<String>> l = new ArrayList<>();
1069	>	l.add(latchAwaitingStringTask(latch));
1070	>	l.add(null);
1071	>	try {
1072	>	e.invokeAny(l, MEDIUM_DELAY_MS, MILLISECONDS);
1073	>	shouldThrow();
1074	>	} catch (NullPointerException success) {}
1075	>	latch.countDown();
1076		}
1077		}
1078
1079	+	/**
1080	+	* timed invokeAny(c) throws ExecutionException if no task completes
1081	+	*/
1082	+	public void testTimedInvokeAny4() throws Exception {
1083	+	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1084	+	try (PoolCleaner cleaner = cleaner(e)) {
1085	+	long startTime = System.nanoTime();
1086	+	List<Callable<String>> l = new ArrayList<>();
1087	+	l.add(new NPETask());
1088	+	try {
1089	+	e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS);
1090	+	shouldThrow();
1091	+	} catch (ExecutionException success) {
1092	+	assertTrue(success.getCause() instanceof NullPointerException);
1093	+	}
1094	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1095	+	}
1096	+	}
1097
1098		/**
1099	<	* If setContinueExistingPeriodicTasksAfterShutdownPolicy is set false,
492	<	* periodic tasks are not cancelled at shutdown
1099	>	* timed invokeAny(c) returns result of some task
1100		*/
1101	<	public void testShutDown3() {
1102	<	try {
1103	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
1104	<	p1.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
1105	<	ScheduledCancellable task =
1106	<	p1.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, TimeUnit.MILLISECONDS);
1107	<	p1.shutdown();
1108	<	assertTrue(p1.isShutdown());
1109	<	BlockingQueue q = p1.getQueue();
1110	<	assertTrue(q.isEmpty());
504	<	Thread.sleep(SHORT_DELAY_MS);
505	<	assertTrue(p1.isTerminated());
1101	>	public void testTimedInvokeAny5() throws Exception {
1102	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1103	>	try (PoolCleaner cleaner = cleaner(e)) {
1104	>	long startTime = System.nanoTime();
1105	>	List<Callable<String>> l = new ArrayList<>();
1106	>	l.add(new StringTask());
1107	>	l.add(new StringTask());
1108	>	String result = e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS);
1109	>	assertSame(TEST_STRING, result);
1110	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1111		}
1112	<	catch(Exception ex) {
1113	<	unexpectedException();
1112	>	}
1113	>
1114	>	/**
1115	>	* timed invokeAll(null) throws NPE
1116	>	*/
1117	>	public void testTimedInvokeAll1() throws Exception {
1118	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1119	>	try (PoolCleaner cleaner = cleaner(e)) {
1120	>	try {
1121	>	e.invokeAll(null, MEDIUM_DELAY_MS, MILLISECONDS);
1122	>	shouldThrow();
1123	>	} catch (NullPointerException success) {}
1124		}
1125		}
1126
1127		/**
1128	<	* if setContinueExistingPeriodicTasksAfterShutdownPolicy is true,
514	<	* periodic tasks are cancelled at shutdown
1128	>	* timed invokeAll(,,null) throws NPE
1129		*/
1130	<	public void testShutDown4() {
1131	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
1132	<	try {
1133	<	p1.setContinueExistingPeriodicTasksAfterShutdownPolicy(true);
1134	<	ScheduledCancellable task =
1135	<	p1.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, TimeUnit.MILLISECONDS);
1136	<	assertFalse(task.isCancelled());
1137	<	p1.shutdown();
1138	<	assertFalse(task.isCancelled());
1139	<	assertFalse(p1.isTerminated());
1140	<	assertTrue(p1.isShutdown());
1141	<	Thread.sleep(SHORT_DELAY_MS);
1142	<	assertFalse(task.isCancelled());
1143	<	task.cancel(true);
1144	<	assertTrue(task.isCancelled());
1145	<	Thread.sleep(SHORT_DELAY_MS);
1146	<	assertTrue(p1.isTerminated());
1130	>	public void testTimedInvokeAllNullTimeUnit() throws Exception {
1131	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1132	>	try (PoolCleaner cleaner = cleaner(e)) {
1133	>	List<Callable<String>> l = new ArrayList<>();
1134	>	l.add(new StringTask());
1135	>	try {
1136	>	e.invokeAll(l, MEDIUM_DELAY_MS, null);
1137	>	shouldThrow();
1138	>	} catch (NullPointerException success) {}
1139	>	}
1140	>	}
1141	>
1142	>	/**
1143	>	* timed invokeAll(empty collection) returns empty collection
1144	>	*/
1145	>	public void testTimedInvokeAll2() throws Exception {
1146	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1147	>	try (PoolCleaner cleaner = cleaner(e)) {
1148	>	List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>(),
1149	>	MEDIUM_DELAY_MS, MILLISECONDS);
1150	>	assertTrue(r.isEmpty());
1151	>	}
1152	>	}
1153	>
1154	>	/**
1155	>	* timed invokeAll(c) throws NPE if c has null elements
1156	>	*/
1157	>	public void testTimedInvokeAll3() throws Exception {
1158	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1159	>	try (PoolCleaner cleaner = cleaner(e)) {
1160	>	List<Callable<String>> l = new ArrayList<>();
1161	>	l.add(new StringTask());
1162	>	l.add(null);
1163	>	try {
1164	>	e.invokeAll(l, MEDIUM_DELAY_MS, MILLISECONDS);
1165	>	shouldThrow();
1166	>	} catch (NullPointerException success) {}
1167		}
1168	<	catch(Exception ex) {
1169	<	unexpectedException();
1168	>	}
1169	>
1170	>	/**
1171	>	* get of element of invokeAll(c) throws exception on failed task
1172	>	*/
1173	>	public void testTimedInvokeAll4() throws Exception {
1174	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1175	>	try (PoolCleaner cleaner = cleaner(e)) {
1176	>	List<Callable<String>> l = new ArrayList<>();
1177	>	l.add(new NPETask());
1178	>	List<Future<String>> futures =
1179	>	e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS);
1180	>	assertEquals(1, futures.size());
1181	>	try {
1182	>	futures.get(0).get();
1183	>	shouldThrow();
1184	>	} catch (ExecutionException success) {
1185	>	assertTrue(success.getCause() instanceof NullPointerException);
1186	>	}
1187		}
1188	<	finally {
1189	<	p1.shutdownNow();
1188	>	}
1189	>
1190	>	/**
1191	>	* timed invokeAll(c) returns results of all completed tasks
1192	>	*/
1193	>	public void testTimedInvokeAll5() throws Exception {
1194	>	final ExecutorService e = new ScheduledThreadPoolExecutor(2);
1195	>	try (PoolCleaner cleaner = cleaner(e)) {
1196	>	List<Callable<String>> l = new ArrayList<>();
1197	>	l.add(new StringTask());
1198	>	l.add(new StringTask());
1199	>	List<Future<String>> futures =
1200	>	e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS);
1201	>	assertEquals(2, futures.size());
1202	>	for (Future<String> future : futures)
1203	>	assertSame(TEST_STRING, future.get());
1204	>	}
1205	>	}
1206	>
1207	>	/**
1208	>	* timed invokeAll(c) cancels tasks not completed by timeout
1209	>	*/
1210	>	public void testTimedInvokeAll6() throws Exception {
1211	>	for (long timeout = timeoutMillis();;) {
1212	>	final CountDownLatch done = new CountDownLatch(1);
1213	>	final Callable<String> waiter = new CheckedCallable<String>() {
1214	>	public String realCall() {
1215	>	try { done.await(LONG_DELAY_MS, MILLISECONDS); }
1216	>	catch (InterruptedException ok) {}
1217	>	return "1"; }};
1218	>	final ExecutorService p = new ScheduledThreadPoolExecutor(2);
1219	>	try (PoolCleaner cleaner = cleaner(p, done)) {
1220	>	List<Callable<String>> tasks = new ArrayList<>();
1221	>	tasks.add(new StringTask("0"));
1222	>	tasks.add(waiter);
1223	>	tasks.add(new StringTask("2"));
1224	>	long startTime = System.nanoTime();
1225	>	List<Future<String>> futures =
1226	>	p.invokeAll(tasks, timeout, MILLISECONDS);
1227	>	assertEquals(tasks.size(), futures.size());
1228	>	assertTrue(millisElapsedSince(startTime) >= timeout);
1229	>	for (Future future : futures)
1230	>	assertTrue(future.isDone());
1231	>	assertTrue(futures.get(1).isCancelled());
1232	>	try {
1233	>	assertEquals("0", futures.get(0).get());
1234	>	assertEquals("2", futures.get(2).get());
1235	>	break;
1236	>	} catch (CancellationException retryWithLongerTimeout) {
1237	>	timeout *= 2;
1238	>	if (timeout >= LONG_DELAY_MS / 2)
1239	>	fail("expected exactly one task to be cancelled");
1240	>	}
1241	>	}
1242	>	}
1243	>	}
1244	>
1245	>	/**
1246	>	* A fixed delay task with overflowing period should not prevent a
1247	>	* one-shot task from executing.
1248	>	* https://bugs.openjdk.java.net/browse/JDK-8051859
1249	>	*/
1250	>	public void testScheduleWithFixedDelay_overflow() throws Exception {
1251	>	final CountDownLatch delayedDone = new CountDownLatch(1);
1252	>	final CountDownLatch immediateDone = new CountDownLatch(1);
1253	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
1254	>	try (PoolCleaner cleaner = cleaner(p)) {
1255	>	final Runnable immediate = new Runnable() { public void run() {
1256	>	immediateDone.countDown();
1257	>	}};
1258	>	final Runnable delayed = new Runnable() { public void run() {
1259	>	delayedDone.countDown();
1260	>	p.submit(immediate);
1261	>	}};
1262	>	p.scheduleWithFixedDelay(delayed, 0L, Long.MAX_VALUE, SECONDS);
1263	>	await(delayedDone);
1264	>	await(immediateDone);
1265		}
1266		}
1267

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