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Comparing jsr166/src/test/tck/ScheduledExecutorTest.java (file contents):
Revision 1.4 by dl, Sun Sep 14 20:42:40 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);
40 >        return new TestSuite(ScheduledExecutorTest.class);
41      }
42  
43 <    static class MyRunnable implements Runnable {
44 <        volatile boolean done = false;
45 <        public void run(){
46 <            try{
47 <                Thread.sleep(SMALL_DELAY_MS);
48 <                done = true;
49 <            } catch(Exception e){
50 <            }
43 >    /**
44 >     * execute successfully executes a runnable
45 >     */
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 >        }
55 >    }
56 >
57 >    /**
58 >     * delayed schedule of callable successfully executes after delay
59 >     */
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() 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  
98 <    static class MyCallable implements Callable {
99 <        volatile boolean done = false;
100 <        public Object call(){
101 <            try{
102 <                Thread.sleep(SMALL_DELAY_MS);
103 <                done = true;
104 <            }catch(Exception e){}
105 <            return Boolean.TRUE;
98 >    /**
99 >     * scheduleAtFixedRate executes runnable after given initial delay
100 >     */
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 <    public void testExecute(){
121 <        try{
122 <            MyRunnable runnable =new MyRunnable();
123 <            ScheduledExecutor one = new ScheduledExecutor(1);
124 <            one.execute(runnable);
125 <            assertFalse(runnable.done);
126 <            Thread.sleep(SHORT_DELAY_MS);
127 <            one.shutdown();
128 <            try{
129 <                Thread.sleep(MEDIUM_DELAY_MS);
130 <            } catch(InterruptedException e){
131 <                fail("unexpected exception");
120 >    /**
121 >     * scheduleWithFixedDelay executes runnable after given initial delay
122 >     */
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 >
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 <            assertTrue(runnable.done);
56 <            one.shutdown();
57 <            joinPool(one);
172 >            fail("unexpected execution rate");
173          }
174 <        catch(Exception e){
175 <            fail("unexpected exception");
174 >    }
175 >
176 >    /**
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          }
62        
220      }
221  
222 <    public void testSchedule1(){
223 <        try{
224 <            MyCallable callable = new MyCallable();
225 <            ScheduledExecutor one = new ScheduledExecutor(1);
226 <            Future f = one.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
227 <            assertFalse(callable.done);
228 <            Thread.sleep(MEDIUM_DELAY_MS);
229 <            assertTrue(callable.done);
230 <            assertEquals(Boolean.TRUE, f.get());
231 <            one.shutdown();
75 <            joinPool(one);
76 <        }catch(RejectedExecutionException e){}
77 <        catch(Exception e){
78 <            fail("unexpected exception");
222 >    /**
223 >     * execute(null) throws NPE
224 >     */
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          }
233      }
234  
235      /**
236 <     *  Another version of schedule, only using Runnable instead of Callable
236 >     * schedule(null) throws NPE
237       */
238 <    public void testSchedule3(){
239 <        try{
240 <            MyRunnable runnable = new MyRunnable();
241 <            ScheduledExecutor one = new ScheduledExecutor(1);
242 <            one.schedule(runnable, SMALL_DELAY_MS, TimeUnit.MILLISECONDS);
243 <            Thread.sleep(SHORT_DELAY_MS);
244 <            assertFalse(runnable.done);
245 <            Thread.sleep(MEDIUM_DELAY_MS);
93 <            assertTrue(runnable.done);
94 <            one.shutdown();
95 <            joinPool(one);
96 <        } catch(Exception e){
97 <            fail("unexpected exception");
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          }
247      }
248 <    
248 >
249      /**
250 <     *  The final version of schedule, using both long, TimeUnit and Runnable
250 >     * execute throws RejectedExecutionException if shutdown
251       */
252 <    public void testSchedule4(){
253 <        try{
254 <            MyRunnable runnable = new MyRunnable();
255 <            ScheduledExecutor one = new ScheduledExecutor(1);
256 <            one.schedule(runnable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
257 <            assertFalse(runnable.done);
258 <            Thread.sleep(MEDIUM_DELAY_MS);
259 <            assertTrue(runnable.done);
260 <            one.shutdown();
261 <            joinPool(one);
114 <        } catch(Exception e){
115 <            fail("unexpected exception");
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          }
263      }
118    
119  
120    // exception tests
264  
265      /**
266 <     *   schedule(Runnable, long) throws RejectedExecutionException
124 <     *  This occurs on an attempt to schedule a task on a shutdown executor
266 >     * schedule throws RejectedExecutionException if shutdown
267       */
268 <    public void testSchedule1_RejectedExecutionException(){
269 <        ScheduledExecutor se = new ScheduledExecutor(1);
270 <        try{
271 <            se.shutdown();
272 <            se.schedule(new NoOpRunnable(),
273 <                        MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
274 <            fail("shoud throw");
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          }
279 <        joinPool(se);
279 >    }
280  
281 +    /**
282 +     * schedule callable throws RejectedExecutionException if shutdown
283 +     */
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 <     *   schedule(Callable, long, TimeUnit) throws RejectedExecutionException
141 <     *  This occurs on an attempt to schedule a task on a shutdown executor
298 >     * scheduleAtFixedRate throws RejectedExecutionException if shutdown
299       */
300 <    public void testSchedule2_RejectedExecutionException(){
301 <        ScheduledExecutor se = new ScheduledExecutor(1);
302 <        try{
303 <            se.shutdown();
304 <            se.schedule(new NoOpCallable(),
305 <                        MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
306 <            fail("should throw");
307 <        } catch(RejectedExecutionException success){
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          }
152        joinPool(se);
311      }
312  
313      /**
314 <     *   schedule(Callable, long) throws RejectedExecutionException
157 <     *  This occurs on an attempt to schedule a task on a shutdown executor
314 >     * scheduleWithFixedDelay throws RejectedExecutionException if shutdown
315       */
316 <     public void testSchedule3_RejectedExecutionException(){
317 <         ScheduledExecutor se = new ScheduledExecutor(1);
318 <         try{
319 <            se.shutdown();
320 <            se.schedule(new NoOpCallable(),
321 <                        MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
322 <            fail("should throw");
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 <     *   scheduleAtFixedRate(Runnable, long, long, TimeUnit) throws
331 <     *  RejectedExecutionException.
174 <     *  This occurs on an attempt to schedule a task on a shutdown executor
330 >     * getActiveCount increases but doesn't overestimate, when a
331 >     * thread becomes active
332       */
333 <    public void testScheduleAtFixedRate1_RejectedExecutionException(){
334 <        ScheduledExecutor se = new ScheduledExecutor(1);
335 <        try{
336 <            se.shutdown();
337 <            se.scheduleAtFixedRate(new NoOpRunnable(),
338 <                                   MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
339 <            fail("should throw");
340 <        } catch(RejectedExecutionException success){
341 <        }
342 <        joinPool(se);
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 >        }
348      }
349 <    
349 >
350      /**
351 <     *   scheduleAtFixedRate(Runnable, long, long, TimeUnit) throws
352 <     *  RejectedExecutionException.
191 <     *  This occurs on an attempt to schedule a task on a shutdown executor
351 >     * getCompletedTaskCount increases, but doesn't overestimate,
352 >     * when tasks complete
353       */
354 <    public void testScheduleAtFixedRate2_RejectedExecutionException(){
355 <        ScheduledExecutor se = new ScheduledExecutor(1);
356 <        try{
357 <            se.shutdown();
358 <            se.scheduleAtFixedRate(new NoOpRunnable(),
359 <                                   1, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
360 <            fail("should throw");
361 <        } catch(RejectedExecutionException success){
362 <        }
363 <        joinPool(se);
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 <     *   scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws
207 <     *  RejectedExecutionException.
208 <     *  This occurs on an attempt to schedule a task on a shutdown executor
382 >     * getCorePoolSize returns size given in constructor if not otherwise set
383       */
384 <    public void testScheduleWithFixedDelay1_RejectedExecutionException(){
385 <        ScheduledExecutor se = new ScheduledExecutor(1);
386 <        try{
387 <            se.shutdown();
388 <            se.scheduleWithFixedDelay(new NoOpRunnable(),
215 <                                      MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
216 <            fail("should throw");
217 <        } catch(RejectedExecutionException success){
218 <        }
219 <        joinPool(se);
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 <     *   scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws
393 <     *  RejectedExecutionException.
225 <     *  This occurs on an attempt to schedule a task on a shutdown executor
392 >     * getLargestPoolSize increases, but doesn't overestimate, when
393 >     * multiple threads active
394       */
395 <     public void testScheduleWithFixedDelay2_RejectedExecutionException(){
396 <         ScheduledExecutor se = new ScheduledExecutor(1);
397 <        try{
398 <            se.shutdown();
399 <            se.scheduleWithFixedDelay(new NoOpRunnable(),
400 <                                      1, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
401 <            fail("should throw");
402 <        } catch(RejectedExecutionException success){
403 <        }
404 <        joinPool(se);
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 <     *   execute throws RejectedExecutionException
417 <     *  This occurs on an attempt to schedule a task on a shutdown executor
416 >     * getPoolSize increases, but doesn't overestimate, when threads
417 >     * become active
418       */
419 <    public void testExecute_RejectedExecutionException(){
420 <        ScheduledExecutor se = new ScheduledExecutor(1);
421 <        try{
422 <            se.shutdown();
423 <            se.execute(new NoOpRunnable());
424 <            fail("should throw");
425 <        } catch(RejectedExecutionException success){
426 <        }
427 <        joinPool(se);
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 <     *   getActiveCount gives correct values
437 >     * getTaskCount increases, but doesn't overestimate, when tasks
438 >     * submitted
439       */
440 <    public void testGetActiveCount(){
441 <        ScheduledExecutor two = new ScheduledExecutor(2);
442 <        assertEquals(0, two.getActiveCount());
443 <        two.execute(new SmallRunnable());
444 <        try{
445 <            Thread.sleep(SHORT_DELAY_MS);
446 <        } catch(Exception e){
447 <            fail("unexpected exception");
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, two.getActiveCount());
469 <        joinPool(two);
468 >        assertEquals(1 + TASKS, p.getTaskCount());
469 >        assertEquals(1 + TASKS, p.getCompletedTaskCount());
470      }
471 <    
471 >
472      /**
473 <     *   getCompleteTaskCount gives correct values
473 >     * getThreadFactory returns factory in constructor if not set
474       */
475 <    public void testGetCompletedTaskCount(){
476 <        ScheduledExecutor two = new ScheduledExecutor(2);
477 <        assertEquals(0, two.getCompletedTaskCount());
478 <        two.execute(new SmallRunnable());
479 <        try{
480 <            Thread.sleep(MEDIUM_DELAY_MS);
279 <        } catch(Exception e){
280 <            fail("unexpected exception");
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          }
282        assertEquals(1, two.getCompletedTaskCount());
283        joinPool(two);
482      }
483 <    
483 >
484      /**
485 <     *   getCorePoolSize gives correct values
485 >     * setThreadFactory sets the thread factory returned by getThreadFactory
486       */
487 <    public void testGetCorePoolSize(){
488 <        ScheduledExecutor one = new ScheduledExecutor(1);
489 <        assertEquals(1, one.getCorePoolSize());
490 <        joinPool(one);
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 >        }
494      }
495 <    
495 >
496      /**
497 <     *   getLargestPoolSize gives correct values
497 >     * setThreadFactory(null) throws NPE
498       */
499 <    public void testGetLargestPoolSize(){
500 <        ScheduledExecutor two = new ScheduledExecutor(2);
501 <        assertEquals(0, two.getLargestPoolSize());
502 <        two.execute(new SmallRunnable());
503 <        two.execute(new SmallRunnable());
504 <        try{
505 <            Thread.sleep(SHORT_DELAY_MS);
305 <        } catch(Exception e){
306 <            fail("unexpected exception");
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          }
308        assertEquals(2, two.getLargestPoolSize());
309        joinPool(two);
507      }
508 <    
508 >
509      /**
510 <     *   getPoolSize gives correct values
510 >     * The default rejected execution handler is AbortPolicy.
511       */
512 <    public void testGetPoolSize(){
513 <        ScheduledExecutor one = new ScheduledExecutor(1);
514 <        assertEquals(0, one.getPoolSize());
515 <        one.execute(new SmallRunnable());
516 <        assertEquals(1, one.getPoolSize());
517 <        joinPool(one);
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 <    
519 >
520      /**
521 <     *   getTaskCount gives correct values
521 >     * isShutdown is false before shutdown, true after
522       */
523 <    public void testGetTaskCount(){
524 <        ScheduledExecutor one = new ScheduledExecutor(1);
525 <        assertEquals(0, one.getTaskCount());
526 <        for(int i = 0; i < 5; i++)
527 <            one.execute(new SmallRunnable());
528 <        try{
529 <            Thread.sleep(SHORT_DELAY_MS);
530 <        } catch(Exception e){
334 <            fail("unexpected exception");
523 >    public void testIsShutdown() {
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          }
336        assertEquals(5, one.getTaskCount());
337        joinPool(one);
532      }
533 <    
533 >
534      /**
535 <     *   isShutDown gives correct values
535 >     * isTerminated is false before termination, true after
536       */
537 <    public void testIsShutdown(){
538 <        
539 <        ScheduledExecutor one = new ScheduledExecutor(1);
540 <        try {
541 <            assertFalse(one.isShutdown());
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 <        finally {
557 <            one.shutdown();
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          }
352        assertTrue(one.isShutdown());
581      }
582  
355        
583      /**
584 <     *   isTerminated gives correct values
358 <     *  Makes sure termination does not take an innapropriate
359 <     *  amount of time
584 >     * getQueue returns the work queue, which contains queued tasks
585       */
586 <    public void testIsTerminated(){
587 <        ScheduledExecutor one = new ScheduledExecutor(1);
588 <        try {
589 <            one.execute(new SmallRunnable());
590 <        } finally {
591 <            one.shutdown();
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          }
368        try {
369            assertTrue(one.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
370            assertTrue(one.isTerminated());
371        } catch(Exception e){
372            fail("unexpected exception");
373        }      
636      }
637  
638      /**
639 <     *   that purge correctly removes cancelled tasks
378 <     *  from the queue
639 >     * purge eventually removes cancelled tasks from the queue
640       */
641 <    public void testPurge(){
642 <        ScheduledExecutor one = new ScheduledExecutor(1);
643 <        ScheduledCancellable[] tasks = new ScheduledCancellable[5];
644 <        for(int i = 0; i < 5; i++){
645 <            tasks[i] = one.schedule(new SmallRunnable(), 1, TimeUnit.MILLISECONDS);
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          }
386        int max = 5;
387        if (tasks[4].cancel(true)) --max;
388        if (tasks[3].cancel(true)) --max;
389        one.purge();
390        long count = one.getTaskCount();
391        assertTrue(count > 0 && count <= max);
392        joinPool(one);
665      }
666  
667      /**
668 <     *   shutDownNow returns a list
669 <     *  containing the correct number of elements
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(){
672 <        ScheduledExecutor one = new ScheduledExecutor(1);
673 <        for(int i = 0; i < 5; i++)
674 <            one.schedule(new SmallRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
675 <        List l = one.shutdownNow();
676 <        assertTrue(one.isShutdown());
677 <        assertTrue(l.size() > 0 && l.size() <= 5);
678 <        joinPool(one);
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 >            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 <    public void testShutDown1(){
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 <            ScheduledExecutor one = new ScheduledExecutor(1);
723 <            assertTrue(one.getExecuteExistingDelayedTasksAfterShutdownPolicy());
724 <            assertFalse(one.getContinueExistingPeriodicTasksAfterShutdownPolicy());
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 >        assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
736 >        assertTrue(p.isTerminated());
737 >    }
738  
739 <            ScheduledCancellable[] tasks = new ScheduledCancellable[5];
740 <            for(int i = 0; i < 5; i++)
741 <                tasks[i] = one.schedule(new NoOpRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
742 <            one.shutdown();
743 <            BlockingQueue q = one.getQueue();
744 <            for (Iterator it = q.iterator(); it.hasNext();) {
745 <                ScheduledCancellable t = (ScheduledCancellable)it.next();
746 <                assertFalse(t.isCancelled());
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 <            assertTrue(one.isShutdown());
819 <            Thread.sleep(SMALL_DELAY_MS);
820 <            for (int i = 0; i < 5; ++i) {
821 <                assertTrue(tasks[i].isDone());
822 <                assertFalse(tasks[i].isCancelled());
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              }
430            
827          }
828 <        catch(Exception ex) {
829 <            fail("unexpected exception");
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          }
844      }
845  
846 +    /**
847 +     * completed submit of runnable returns successfully
848 +     */
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 +        }
856 +    }
857  
858 <    public void testShutDown2(){
859 <        try {
860 <            ScheduledExecutor one = new ScheduledExecutor(1);
861 <            one.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
862 <            ScheduledCancellable[] tasks = new ScheduledCancellable[5];
863 <            for(int i = 0; i < 5; i++)
864 <                tasks[i] = one.schedule(new NoOpRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
865 <            one.shutdown();
866 <            assertTrue(one.isShutdown());
447 <            BlockingQueue q = one.getQueue();
448 <            assertTrue(q.isEmpty());
449 <            Thread.sleep(SMALL_DELAY_MS);
450 <            assertTrue(one.isTerminated());
858 >    /**
859 >     * completed submit of (runnable, result) returns result
860 >     */
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          }
868 <        catch(Exception ex) {
869 <            fail("unexpected exception");
868 >    }
869 >
870 >    /**
871 >     * invokeAny(null) throws NPE
872 >     */
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          }
881      }
882  
883 +    /**
884 +     * invokeAny(empty collection) throws IAE
885 +     */
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 <    public void testShutDown3(){
897 <        try {
898 <            ScheduledExecutor one = new ScheduledExecutor(1);
899 <            one.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
900 <            ScheduledCancellable task =
901 <                one.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, TimeUnit.MILLISECONDS);
902 <            one.shutdown();
903 <            assertTrue(one.isShutdown());
904 <            BlockingQueue q = one.getQueue();
905 <            assertTrue(q.isEmpty());
906 <            Thread.sleep(SHORT_DELAY_MS);
907 <            assertTrue(one.isTerminated());
896 >    /**
897 >     * invokeAny(c) throws NPE if c has null elements
898 >     */
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 >    /**
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          }
929 <        catch(Exception ex) {
930 <            fail("unexpected exception");
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 <    public void testShutDown4(){
946 <        ScheduledExecutor one = new ScheduledExecutor(1);
947 <        try {
948 <            one.setContinueExistingPeriodicTasksAfterShutdownPolicy(true);
949 <            ScheduledCancellable task =
950 <                one.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, TimeUnit.MILLISECONDS);
951 <            assertFalse(task.isCancelled());
952 <            one.shutdown();
953 <            assertFalse(task.isCancelled());
954 <            assertFalse(one.isTerminated());
955 <            assertTrue(one.isShutdown());
956 <            Thread.sleep(SHORT_DELAY_MS);
957 <            assertFalse(task.isCancelled());
958 <            task.cancel(true);
959 <            assertTrue(task.isCancelled());
960 <            Thread.sleep(SHORT_DELAY_MS);
961 <            assertTrue(one.isTerminated());
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 >            }
1001 >        }
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 >     * timed invokeAny(,,null) throws NPE
1035 >     */
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 <        catch(Exception ex) {
1047 <            fail("unexpected exception");
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 <        finally {
1060 <            one.shutdownNow();
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 >     * timed invokeAny(c) returns result of some task
1100 >     */
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 >    }
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 >     * timed invokeAll(,,null) throws NPE
1129 >     */
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 >    }
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 >    }
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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