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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 1.80 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.*;
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		}
40		public static Test suite() {
41	<	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	<	}
41	>	return new TestSuite(ScheduledExecutorTest.class);
42		}
43
44		/**
45		* execute successfully executes a runnable
46		*/
47	<	public void testExecute() {
48	<	try {
49	<	MyRunnable runnable =new MyRunnable();
50	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
51	<	p1.execute(runnable);
52	<	assertFalse(runnable.done);
53	<	Thread.sleep(SHORT_DELAY_MS);
54	<	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);
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		}
63	–	catch(Exception e){
64	–	unexpectedException();
65	–	}
66	–
56		}
57
69	–
58		/**
59		* delayed schedule of callable successfully executes after delay
60		*/
61	<	public void testSchedule1() {
62	<	try {
63	<	MyCallable callable = new MyCallable();
64	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
65	<	Future f = p1.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
66	<	assertFalse(callable.done);
67	<	Thread.sleep(MEDIUM_DELAY_MS);
68	<	assertTrue(callable.done);
69	<	assertEquals(Boolean.TRUE, f.get());
70	<	p1.shutdown();
71	<	joinPool(p1);
72	<	} catch(RejectedExecutionException e){}
73	<	catch(Exception e){
74	<	unexpectedException();
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() {
83	<	try {
84	<	MyRunnable runnable = new MyRunnable();
85	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
86	<	p1.schedule(runnable, SMALL_DELAY_MS, TimeUnit.MILLISECONDS);
87	<	Thread.sleep(SHORT_DELAY_MS);
88	<	assertFalse(runnable.done);
89	<	Thread.sleep(MEDIUM_DELAY_MS);
90	<	assertTrue(runnable.done);
91	<	p1.shutdown();
92	<	joinPool(p1);
93	<	} catch(Exception e){
94	<	unexpectedException();
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	<
98	>
99		/**
100		* scheduleAtFixedRate executes runnable after given initial delay
101		*/
102	<	public void testSchedule4() {
103	<	try {
104	<	MyRunnable runnable = new MyRunnable();
105	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
106	<	ScheduledCancellable h = p1.scheduleAtFixedRate(runnable, SHORT_DELAY_MS, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
107	<	assertFalse(runnable.done);
108	<	Thread.sleep(MEDIUM_DELAY_MS);
109	<	assertTrue(runnable.done);
110	<	h.cancel(true);
111	<	p1.shutdown();
112	<	joinPool(p1);
113	<	} catch(Exception e){
114	<	unexpectedException();
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() {
125	<	try {
126	<	MyRunnable runnable = new MyRunnable();
127	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
128	<	ScheduledCancellable h = p1.scheduleWithFixedDelay(runnable, SHORT_DELAY_MS, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
129	<	assertFalse(runnable.done);
130	<	Thread.sleep(MEDIUM_DELAY_MS);
131	<	assertTrue(runnable.done);
132	<	h.cancel(true);
133	<	p1.shutdown();
134	<	joinPool(p1);
135	<	} catch(Exception e){
136	<	unexpectedException();
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	<
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		/**
178	<	*  execute (null) throws NPE
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	>	/**
224	>	* execute(null) throws NPE
225		*/
226	<	public void testExecuteNull() {
227	<	ScheduledExecutor se = null;
228	<	try {
229	<	se = new ScheduledExecutor(1);
230	<	se.execute(null);
231	<	shouldThrow();
232	<	} catch(NullPointerException success){}
157	<	catch(Exception e){
158	<	unexpectedException();
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		}
160	–
161	–	joinPool(se);
234		}
235
236		/**
237	<	* schedule (null) throws NPE
237	>	* schedule(null) throws NPE
238		*/
239	<	public void testScheduleNull() {
240	<	ScheduledExecutor se = new ScheduledExecutor(1);
241	<	try {
242	<	MyCallable callable = null;
243	<	Future f = se.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
244	<	shouldThrow();
245	<	} catch(NullPointerException success){}
246	<	catch(Exception e){
175	<	unexpectedException();
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		}
177	–	joinPool(se);
248		}
249	<
249	>
250		/**
251		* execute throws RejectedExecutionException if shutdown
252		*/
253	<	public void testSchedule1_RejectedExecutionException() {
254	<	ScheduledExecutor se = new ScheduledExecutor(1);
255	<	try {
256	<	se.shutdown();
257	<	se.schedule(new NoOpRunnable(),
258	<	MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
259	<	shouldThrow();
260	<	} catch(RejectedExecutionException success){
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		}
192	–	joinPool(se);
193	–
264		}
265
266		/**
267		* schedule throws RejectedExecutionException if shutdown
268		*/
269	<	public void testSchedule2_RejectedExecutionException() {
270	<	ScheduledExecutor se = new ScheduledExecutor(1);
271	<	try {
272	<	se.shutdown();
273	<	se.schedule(new NoOpCallable(),
274	<	MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
275	<	shouldThrow();
276	<	} catch(RejectedExecutionException success){
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		}
208	–	joinPool(se);
280		}
281
282		/**
283		* schedule callable throws RejectedExecutionException if shutdown
284		*/
285	<	public void testSchedule3_RejectedExecutionException() {
286	<	ScheduledExecutor se = new ScheduledExecutor(1);
287	<	try {
288	<	se.shutdown();
289	<	se.schedule(new NoOpCallable(),
290	<	MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
291	<	shouldThrow();
292	<	} catch(RejectedExecutionException success){
293	<	}
294	<	joinPool(se);
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	<	*  scheduleAtFixedRate throws RejectedExecutionException if shutdown
299	>	* scheduleAtFixedRate throws RejectedExecutionException if shutdown
300		*/
301	<	public void testScheduleAtFixedRate1_RejectedExecutionException() {
302	<	ScheduledExecutor se = new ScheduledExecutor(1);
303	<	try {
304	<	se.shutdown();
305	<	se.scheduleAtFixedRate(new NoOpRunnable(),
306	<	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
307	<	shouldThrow();
308	<	} catch(RejectedExecutionException success){
309	<	}
310	<	joinPool(se);
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		* scheduleWithFixedDelay throws RejectedExecutionException if shutdown
316		*/
317	<	public void testScheduleWithFixedDelay1_RejectedExecutionException() {
318	<	ScheduledExecutor se = new ScheduledExecutor(1);
319	<	try {
320	<	se.shutdown();
321	<	se.scheduleWithFixedDelay(new NoOpRunnable(),
322	<	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
323	<	shouldThrow();
324	<	} catch(RejectedExecutionException success){
325	<	}
326	<	joinPool(se);
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		}
329
330		/**
331	<	*  getActiveCount increases but doesn't overestimate, when a
332	<	*  thread becomes active
333	<	*/
334	<	public void testGetActiveCount() {
335	<	ScheduledExecutor p2 = new ScheduledExecutor(2);
336	<	assertEquals(0, p2.getActiveCount());
337	<	p2.execute(new SmallRunnable());
338	<	try {
339	<	Thread.sleep(SHORT_DELAY_MS);
340	<	} catch(Exception e){
341	<	unexpectedException();
342	<	}
343	<	assertEquals(1, p2.getActiveCount());
344	<	joinPool(p2);
345	<	}
346	<
347	<	/**
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();
331	>	* getActiveCount increases but doesn't overestimate, when a
332	>	* thread becomes active
333	>	*/
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		}
286	–	assertEquals(1, p2.getCompletedTaskCount());
287	–	joinPool(p2);
349		}
350	<
350	>
351		/**
352	<	*  getCorePoolSize returns size given in constructor if not otherwise set
352	>	* getCompletedTaskCount increases, but doesn't overestimate,
353	>	* when tasks complete
354	>	*/
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	>	* getCorePoolSize returns size given in constructor if not otherwise set
384		*/
385	<	public void testGetCorePoolSize() {
386	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
387	<	assertEquals(1, p1.getCorePoolSize());
388	<	joinPool(p1);
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	<
472	>
473		/**
474	<	*    getLargestPoolSize increases, but doesn't overestimate, when
301	<	*   multiple threads active
474	>	* getThreadFactory returns factory in constructor if not set
475		*/
476	<	public void testGetLargestPoolSize() {
477	<	ScheduledExecutor p2 = new ScheduledExecutor(2);
478	<	assertEquals(0, p2.getLargestPoolSize());
479	<	p2.execute(new SmallRunnable());
480	<	p2.execute(new SmallRunnable());
481	<	try {
482	<	Thread.sleep(SHORT_DELAY_MS);
483	<	} catch(Exception e){
484	<	unexpectedException();
485	<	}
486	<	assertEquals(2, p2.getLargestPoolSize());
487	<	joinPool(p2);
488	<	}
489	<
490	<	/**
491	<	*   getPoolSize increases, but doesn't overestimate, when threads
492	<	*   become active
493	<	*/
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();
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	>
485	>	/**
486	>	* setThreadFactory sets the thread factory returned by getThreadFactory
487	>	*/
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		}
343	–	assertEquals(5, p1.getTaskCount());
344	–	joinPool(p1);
495		}
496	<
496	>
497		/**
498	<	*   is isShutDown is false before shutdown, true after
498	>	* setThreadFactory(null) throws NPE
499	>	*/
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	>	* isShutdown is false before shutdown, true after
512		*/
513		public void testIsShutdown() {
514	<
515	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
514	>
515	>	final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
516		try {
517	<	assertFalse(p1.isShutdown());
517	>	assertFalse(p.isShutdown());
518		}
519		finally {
520	<	p1.shutdown();
520	>	try { p.shutdown(); } catch (SecurityException ok) { return; }
521		}
522	<	assertTrue(p1.isShutdown());
522	>	assertTrue(p.isShutdown());
523		}
524
362	–
525		/**
526	<	*   isTerminated is false before termination, true after
526	>	* isTerminated is false before termination, true after
527		*/
528	<	public void testIsTerminated() {
529	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
530	<	try {
531	<	p1.execute(new SmallRunnable());
532	<	} finally {
533	<	p1.shutdown();
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	+	* 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	<	assertTrue(p1.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
684	<	assertTrue(p1.isTerminated());
685	<	} catch(Exception e){
686	<	unexpectedException();
687	<	}
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	<	*  isTerminating is not true when running or when terminated
698	<	*/
699	<	public void testIsTerminating() {
700	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
701	<	assertFalse(p1.isTerminating());
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	<	p1.execute(new SmallRunnable());
714	<	assertFalse(p1.isTerminating());
715	<	} finally {
716	<	p1.shutdown();
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	<	try {
727	<	assertTrue(p1.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
395	<	assertTrue(p1.isTerminated());
396	<	assertFalse(p1.isTerminating());
397	<	} catch(Exception e){
398	<	unexpectedException();
399	<	}
726	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
727	>	assertTrue(p.isTerminated());
728		}
729
730		/**
731	<	*   purge removes cancelled tasks from the queue
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	>	}
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 testPurge() {
828	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
829	<	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
830	<	for(int i = 0; i < 5; i++){
831	<	tasks[i] = p1.schedule(new SmallRunnable(), 1, TimeUnit.MILLISECONDS);
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		}
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);
834		}
835
836		/**
837	<	*  shutDownNow returns a list containing tasks that were not run
837	>	* completed submit of runnable returns successfully
838		*/
839	<	public void testShutDownNow() {
840	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
841	<	for(int i = 0; i < 5; i++)
842	<	p1.schedule(new SmallRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
843	<	List l = p1.shutdownNow();
844	<	assertTrue(p1.isShutdown());
845	<	assertTrue(l.size() > 0 && l.size() <= 5);
430	<	joinPool(p1);
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
848		/**
849	<	* In default setting, shutdown cancels periodic but not delayed
435	<	* tasks at shutdown
849	>	* completed submit of (runnable, result) returns result
850		*/
851	<	public void testShutDown1() {
852	<	try {
853	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
854	<	assertTrue(p1.getExecuteExistingDelayedTasksAfterShutdownPolicy());
855	<	assertFalse(p1.getContinueExistingPeriodicTasksAfterShutdownPolicy());
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	>
860	>	/**
861	>	* invokeAny(null) throws NPE
862	>	*/
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	<	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
905	<	for(int i = 0; i < 5; i++)
906	<	tasks[i] = p1.schedule(new NoOpRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
907	<	p1.shutdown();
908	<	BlockingQueue q = p1.getQueue();
909	<	for (Iterator it = q.iterator(); it.hasNext();) {
910	<	ScheduledCancellable t = (ScheduledCancellable)it.next();
911	<	assertFalse(t.isCancelled());
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		}
918	<	assertTrue(p1.isShutdown());
919	<	Thread.sleep(SMALL_DELAY_MS);
920	<	for (int i = 0; i < 5; ++i) {
921	<	assertTrue(tasks[i].isDone());
922	<	assertFalse(tasks[i].isCancelled());
918	>	}
919	>	}
920	>
921	>	/**
922	>	* invokeAny(c) returns result of some task
923	>	*/
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	>
935	>	/**
936	>	* invokeAll(null) throws NPE
937	>	*/
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	>	}
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	>	}
957	>	}
958	>
959	>	/**
960	>	* invokeAll(c) throws NPE if c has null elements
961	>	*/
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	>	* get of invokeAll(c) throws exception on failed task
977	>	*/
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		}
458	–
991		}
992	<	catch(Exception ex) {
993	<	unexpectedException();
992	>	}
993	>
994	>	/**
995	>	* invokeAll(c) returns results of all completed tasks
996	>	*/
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	+	/**
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		/**
1024	<	* If setExecuteExistingDelayedTasksAfterShutdownPolicy is false,
468	<	* delayed tasks are cancelled at shutdown
1024	>	* timed invokeAny(,,null) throws NPE
1025		*/
1026	<	public void testShutDown2() {
1027	<	try {
1028	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
1029	<	p1.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
1030	<	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
1031	<	for(int i = 0; i < 5; i++)
1032	<	tasks[i] = p1.schedule(new NoOpRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
1033	<	p1.shutdown();
1034	<	assertTrue(p1.isShutdown());
479	<	BlockingQueue q = p1.getQueue();
480	<	assertTrue(q.isEmpty());
481	<	Thread.sleep(SMALL_DELAY_MS);
482	<	assertTrue(p1.isTerminated());
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	<	unexpectedException();
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		/**
1070	<	* If setContinueExistingPeriodicTasksAfterShutdownPolicy is set false,
492	<	* periodic tasks are not cancelled at shutdown
1070	>	* timed invokeAny(c) throws ExecutionException if no task completes
1071		*/
1072	<	public void testShutDown3() {
1073	<	try {
1074	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
1075	<	p1.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
1076	<	ScheduledCancellable task =
1077	<	p1.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, TimeUnit.MILLISECONDS);
1078	<	p1.shutdown();
1079	<	assertTrue(p1.isShutdown());
1080	<	BlockingQueue q = p1.getQueue();
1081	<	assertTrue(q.isEmpty());
1082	<	Thread.sleep(SHORT_DELAY_MS);
1083	<	assertTrue(p1.isTerminated());
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	<	unexpectedException();
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	<	* if setContinueExistingPeriodicTasksAfterShutdownPolicy is true,
514	<	* periodic tasks are cancelled at shutdown
1105	>	* timed invokeAll(null) throws NPE
1106		*/
1107	<	public void testShutDown4() {
1108	<	ScheduledExecutor p1 = new ScheduledExecutor(1);
1109	<	try {
1110	<	p1.setContinueExistingPeriodicTasksAfterShutdownPolicy(true);
1111	<	ScheduledCancellable task =
1112	<	p1.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, TimeUnit.MILLISECONDS);
1113	<	assertFalse(task.isCancelled());
523	<	p1.shutdown();
524	<	assertFalse(task.isCancelled());
525	<	assertFalse(p1.isTerminated());
526	<	assertTrue(p1.isShutdown());
527	<	Thread.sleep(SHORT_DELAY_MS);
528	<	assertFalse(task.isCancelled());
529	<	task.cancel(true);
530	<	assertTrue(task.isCancelled());
531	<	Thread.sleep(SHORT_DELAY_MS);
532	<	assertTrue(p1.isTerminated());
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	<	catch(Exception ex) {
1116	<	unexpectedException();
1115	>	}
1116	>
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	<	finally {
1131	<	p1.shutdownNow();
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	>	/**
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	>	}
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	>	}
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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