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

Comparing jsr166/src/test/tck/ThreadPoolExecutorTest.java (file contents):
Revision 1.105 by jsr166, Tue Oct 6 00:41:47 2015 UTC vs.
Revision 1.126 by jsr166, Fri Sep 6 18:43:35 2019 UTC

#	Line 11 | Line 11 | import static java.util.concurrent.TimeU
11		import static java.util.concurrent.TimeUnit.SECONDS;
12
13		import java.util.ArrayList;
14	+	import java.util.Collection;
15	+	import java.util.Collections;
16		import java.util.List;
17		import java.util.concurrent.ArrayBlockingQueue;
18		import java.util.concurrent.BlockingQueue;
#	Line 18 | Line 20 | import java.util.concurrent.Callable;
20		import java.util.concurrent.CancellationException;
21		import java.util.concurrent.CountDownLatch;
22		import java.util.concurrent.ExecutionException;
21	–	import java.util.concurrent.Executors;
23		import java.util.concurrent.ExecutorService;
24		import java.util.concurrent.Future;
25		import java.util.concurrent.FutureTask;
#	Line 27 | Line 28 | import java.util.concurrent.RejectedExec
28		import java.util.concurrent.RejectedExecutionHandler;
29		import java.util.concurrent.SynchronousQueue;
30		import java.util.concurrent.ThreadFactory;
31	+	import java.util.concurrent.ThreadLocalRandom;
32		import java.util.concurrent.ThreadPoolExecutor;
33	<	import java.util.concurrent.TimeUnit;
33	>	import java.util.concurrent.ThreadPoolExecutor.AbortPolicy;
34	>	import java.util.concurrent.ThreadPoolExecutor.CallerRunsPolicy;
35	>	import java.util.concurrent.ThreadPoolExecutor.DiscardPolicy;
36	>	import java.util.concurrent.ThreadPoolExecutor.DiscardOldestPolicy;
37		import java.util.concurrent.atomic.AtomicInteger;
38	+	import java.util.concurrent.atomic.AtomicReference;
39
40		import junit.framework.Test;
41		import junit.framework.TestSuite;
#	Line 92 | Line 98 | public class ThreadPoolExecutorTest exte
98		final Runnable task = new CheckedRunnable() {
99		public void realRun() { done.countDown(); }};
100		p.execute(task);
101	<	assertTrue(done.await(LONG_DELAY_MS, MILLISECONDS));
101	>	await(done);
102		}
103		}
104
#	Line 101 | Line 107 | public class ThreadPoolExecutorTest exte
107		* thread becomes active
108		*/
109		public void testGetActiveCount() throws InterruptedException {
110	+	final CountDownLatch done = new CountDownLatch(1);
111		final ThreadPoolExecutor p =
112		new ThreadPoolExecutor(2, 2,
113		LONG_DELAY_MS, MILLISECONDS,
114		new ArrayBlockingQueue<Runnable>(10));
115	<	try (PoolCleaner cleaner = cleaner(p)) {
115	>	try (PoolCleaner cleaner = cleaner(p, done)) {
116		final CountDownLatch threadStarted = new CountDownLatch(1);
110	–	final CountDownLatch done = new CountDownLatch(1);
117		assertEquals(0, p.getActiveCount());
118		p.execute(new CheckedRunnable() {
119		public void realRun() throws InterruptedException {
120		threadStarted.countDown();
121		assertEquals(1, p.getActiveCount());
122	<	done.await();
122	>	await(done);
123		}});
124	<	assertTrue(threadStarted.await(LONG_DELAY_MS, MILLISECONDS));
124	>	await(threadStarted);
125		assertEquals(1, p.getActiveCount());
120	–	done.countDown();
126		}
127		}
128
#	Line 187 | Line 192 | public class ThreadPoolExecutorTest exte
192		public void realRun() throws InterruptedException {
193		threadStarted.countDown();
194		assertEquals(0, p.getCompletedTaskCount());
195	<	threadProceed.await();
195	>	await(threadProceed);
196		threadDone.countDown();
197		}});
198		await(threadStarted);
199		assertEquals(0, p.getCompletedTaskCount());
200		threadProceed.countDown();
201	<	threadDone.await();
201	>	await(threadDone);
202		long startTime = System.nanoTime();
203		while (p.getCompletedTaskCount() != 1) {
204		if (millisElapsedSince(startTime) > LONG_DELAY_MS)
#	Line 277 | Line 282 | public class ThreadPoolExecutorTest exte
282		}
283
284		/**
285	+	* The default rejected execution handler is AbortPolicy.
286	+	*/
287	+	public void testDefaultRejectedExecutionHandler() {
288	+	final ThreadPoolExecutor p =
289	+	new ThreadPoolExecutor(1, 2,
290	+	LONG_DELAY_MS, MILLISECONDS,
291	+	new ArrayBlockingQueue<Runnable>(10));
292	+	try (PoolCleaner cleaner = cleaner(p)) {
293	+	assertTrue(p.getRejectedExecutionHandler() instanceof AbortPolicy);
294	+	}
295	+	}
296	+
297	+	/**
298		* getRejectedExecutionHandler returns handler in constructor if not set
299		*/
300		public void testGetRejectedExecutionHandler() {
#	Line 341 | Line 359 | public class ThreadPoolExecutorTest exte
359		p.execute(new CheckedRunnable() {
360		public void realRun() throws InterruptedException {
361		threadsStarted.countDown();
362	<	done.await();
362	>	await(done);
363		assertEquals(THREADS, p.getLargestPoolSize());
364		}});
365	<	assertTrue(threadsStarted.await(LONG_DELAY_MS, MILLISECONDS));
365	>	await(threadsStarted);
366		assertEquals(THREADS, p.getLargestPoolSize());
367		}
368		assertEquals(THREADS, p.getLargestPoolSize());
#	Line 385 | Line 403 | public class ThreadPoolExecutorTest exte
403		public void realRun() throws InterruptedException {
404		threadStarted.countDown();
405		assertEquals(1, p.getPoolSize());
406	<	done.await();
406	>	await(done);
407		}});
408	<	assertTrue(threadStarted.await(LONG_DELAY_MS, MILLISECONDS));
408	>	await(threadStarted);
409		assertEquals(1, p.getPoolSize());
410		}
411		}
#	Line 409 | Line 427 | public class ThreadPoolExecutorTest exte
427		p.execute(new CheckedRunnable() {
428		public void realRun() throws InterruptedException {
429		threadStarted.countDown();
430	<	done.await();
430	>	await(done);
431		}});
432	<	assertTrue(threadStarted.await(LONG_DELAY_MS, MILLISECONDS));
432	>	await(threadStarted);
433		assertEquals(1, p.getTaskCount());
434		assertEquals(0, p.getCompletedTaskCount());
435		for (int i = 0; i < TASKS; i++) {
#	Line 420 | Line 438 | public class ThreadPoolExecutorTest exte
438		public void realRun() throws InterruptedException {
439		threadStarted.countDown();
440		assertEquals(1 + TASKS, p.getTaskCount());
441	<	done.await();
441	>	await(done);
442		}});
443		}
444		assertEquals(1 + TASKS, p.getTaskCount());
#	Line 459 | Line 477 | public class ThreadPoolExecutorTest exte
477		assertFalse(p.awaitTermination(Long.MIN_VALUE, MILLISECONDS));
478		assertFalse(p.awaitTermination(-1L, NANOSECONDS));
479		assertFalse(p.awaitTermination(-1L, MILLISECONDS));
480	<	assertFalse(p.awaitTermination(0L, NANOSECONDS));
481	<	assertFalse(p.awaitTermination(0L, MILLISECONDS));
480	>	assertFalse(p.awaitTermination(randomExpiredTimeout(),
481	>	randomTimeUnit()));
482		long timeoutNanos = 999999L;
483		long startTime = System.nanoTime();
484		assertFalse(p.awaitTermination(timeoutNanos, NANOSECONDS));
#	Line 493 | Line 511 | public class ThreadPoolExecutorTest exte
511		public void realRun() throws InterruptedException {
512		assertFalse(p.isTerminating());
513		threadStarted.countDown();
514	<	done.await();
514	>	await(done);
515		}});
516	<	assertTrue(threadStarted.await(LONG_DELAY_MS, MILLISECONDS));
516	>	await(threadStarted);
517		assertFalse(p.isTerminating());
518		done.countDown();
519		try { p.shutdown(); } catch (SecurityException ok) { return; }
#	Line 521 | Line 539 | public class ThreadPoolExecutorTest exte
539		public void realRun() throws InterruptedException {
540		assertFalse(p.isTerminating());
541		threadStarted.countDown();
542	<	done.await();
542	>	await(done);
543		}});
544	<	assertTrue(threadStarted.await(LONG_DELAY_MS, MILLISECONDS));
544	>	await(threadStarted);
545		assertFalse(p.isTerminating());
546		done.countDown();
547		try { p.shutdown(); } catch (SecurityException ok) { return; }
#	Line 537 | Line 555 | public class ThreadPoolExecutorTest exte
555		* getQueue returns the work queue, which contains queued tasks
556		*/
557		public void testGetQueue() throws InterruptedException {
558	<	final BlockingQueue<Runnable> q = new ArrayBlockingQueue<Runnable>(10);
558	>	final CountDownLatch done = new CountDownLatch(1);
559	>	final BlockingQueue<Runnable> q = new ArrayBlockingQueue<>(10);
560		final ThreadPoolExecutor p =
561		new ThreadPoolExecutor(1, 1,
562		LONG_DELAY_MS, MILLISECONDS,
563		q);
564	<	try (PoolCleaner cleaner = cleaner(p)) {
564	>	try (PoolCleaner cleaner = cleaner(p, done)) {
565		final CountDownLatch threadStarted = new CountDownLatch(1);
547	–	final CountDownLatch done = new CountDownLatch(1);
566		FutureTask[] tasks = new FutureTask[5];
567		for (int i = 0; i < tasks.length; i++) {
568		Callable task = new CheckedCallable<Boolean>() {
569		public Boolean realCall() throws InterruptedException {
570		threadStarted.countDown();
571		assertSame(q, p.getQueue());
572	<	done.await();
572	>	await(done);
573		return Boolean.TRUE;
574		}};
575		tasks[i] = new FutureTask(task);
576		p.execute(tasks[i]);
577		}
578	<	assertTrue(threadStarted.await(LONG_DELAY_MS, MILLISECONDS));
578	>	await(threadStarted);
579		assertSame(q, p.getQueue());
580		assertFalse(q.contains(tasks[0]));
581		assertTrue(q.contains(tasks[tasks.length - 1]));
582		assertEquals(tasks.length - 1, q.size());
565	–	done.countDown();
583		}
584		}
585
#	Line 570 | Line 587 | public class ThreadPoolExecutorTest exte
587		* remove(task) removes queued task, and fails to remove active task
588		*/
589		public void testRemove() throws InterruptedException {
590	<	BlockingQueue<Runnable> q = new ArrayBlockingQueue<Runnable>(10);
590	>	final CountDownLatch done = new CountDownLatch(1);
591	>	BlockingQueue<Runnable> q = new ArrayBlockingQueue<>(10);
592		final ThreadPoolExecutor p =
593		new ThreadPoolExecutor(1, 1,
594		LONG_DELAY_MS, MILLISECONDS,
595		q);
596	<	try (PoolCleaner cleaner = cleaner(p)) {
596	>	try (PoolCleaner cleaner = cleaner(p, done)) {
597		Runnable[] tasks = new Runnable[6];
598		final CountDownLatch threadStarted = new CountDownLatch(1);
581	–	final CountDownLatch done = new CountDownLatch(1);
599		for (int i = 0; i < tasks.length; i++) {
600		tasks[i] = new CheckedRunnable() {
601		public void realRun() throws InterruptedException {
602		threadStarted.countDown();
603	<	done.await();
603	>	await(done);
604		}};
605		p.execute(tasks[i]);
606		}
607	<	assertTrue(threadStarted.await(LONG_DELAY_MS, MILLISECONDS));
607	>	await(threadStarted);
608		assertFalse(p.remove(tasks[0]));
609		assertTrue(q.contains(tasks[4]));
610		assertTrue(q.contains(tasks[3]));
#	Line 597 | Line 614 | public class ThreadPoolExecutorTest exte
614		assertTrue(q.contains(tasks[3]));
615		assertTrue(p.remove(tasks[3]));
616		assertFalse(q.contains(tasks[3]));
600	–	done.countDown();
617		}
618		}
619
#	Line 607 | Line 623 | public class ThreadPoolExecutorTest exte
623		public void testPurge() throws InterruptedException {
624		final CountDownLatch threadStarted = new CountDownLatch(1);
625		final CountDownLatch done = new CountDownLatch(1);
626	<	final BlockingQueue<Runnable> q = new ArrayBlockingQueue<Runnable>(10);
626	>	final BlockingQueue<Runnable> q = new ArrayBlockingQueue<>(10);
627		final ThreadPoolExecutor p =
628		new ThreadPoolExecutor(1, 1,
629		LONG_DELAY_MS, MILLISECONDS,
#	Line 618 | Line 634 | public class ThreadPoolExecutorTest exte
634		Callable task = new CheckedCallable<Boolean>() {
635		public Boolean realCall() throws InterruptedException {
636		threadStarted.countDown();
637	<	done.await();
637	>	await(done);
638		return Boolean.TRUE;
639		}};
640		tasks[i] = new FutureTask(task);
641		p.execute(tasks[i]);
642		}
643	<	assertTrue(threadStarted.await(LONG_DELAY_MS, MILLISECONDS));
643	>	await(threadStarted);
644		assertEquals(tasks.length, p.getTaskCount());
645		assertEquals(tasks.length - 1, q.size());
646		assertEquals(1L, p.getActiveCount());
#	Line 656 | Line 672 | public class ThreadPoolExecutorTest exte
672		Runnable waiter = new CheckedRunnable() { public void realRun() {
673		threadsStarted.countDown();
674		try {
675	<	MILLISECONDS.sleep(2 * LONG_DELAY_MS);
675	>	MILLISECONDS.sleep(LONGER_DELAY_MS);
676		} catch (InterruptedException success) {}
677		ran.getAndIncrement();
678		}};
679		for (int i = 0; i < count; i++)
680		p.execute(waiter);
681	<	assertTrue(threadsStarted.await(LONG_DELAY_MS, MILLISECONDS));
681	>	await(threadsStarted);
682		assertEquals(poolSize, p.getActiveCount());
683		assertEquals(0, p.getCompletedTaskCount());
684		final List<Runnable> queuedTasks;
#	Line 1037 | Line 1053 | public class ThreadPoolExecutorTest exte
1053		Callable task = new CheckedCallable<Boolean>() {
1054		public Boolean realCall() throws InterruptedException {
1055		threadStarted.countDown();
1056	<	done.await();
1056	>	await(done);
1057		return Boolean.TRUE;
1058		}};
1059		p.submit(task).get();
1060		}});
1061
1062	<	await(threadStarted);
1062	>	await(threadStarted); // ensure quiescence
1063		t.interrupt();
1064		awaitTermination(t);
1065		}
1066		}
1067
1068		/**
1069	<	* execute throws RejectedExecutionException if saturated.
1069	>	* Submitted tasks are rejected when saturated or shutdown
1070		*/
1071	<	public void testSaturatedExecute() {
1072	<	final ThreadPoolExecutor p =
1073	<	new ThreadPoolExecutor(1, 1,
1074	<	LONG_DELAY_MS, MILLISECONDS,
1075	<	new ArrayBlockingQueue<Runnable>(1));
1076	<	try (PoolCleaner cleaner = cleaner(p)) {
1077	<	final CountDownLatch done = new CountDownLatch(1);
1078	<	Runnable task = new CheckedRunnable() {
1079	<	public void realRun() throws InterruptedException {
1080	<	done.await();
1065	<	}};
1066	<	for (int i = 0; i < 2; ++i)
1067	<	p.execute(task);
1068	<	for (int i = 0; i < 2; ++i) {
1071	>	public void testSubmittedTasksRejectedWhenSaturatedOrShutdown() throws InterruptedException {
1072	>	final ThreadPoolExecutor p = new ThreadPoolExecutor(
1073	>	1, 1, 1, SECONDS, new ArrayBlockingQueue<Runnable>(1));
1074	>	final int saturatedSize = saturatedSize(p);
1075	>	final ThreadLocalRandom rnd = ThreadLocalRandom.current();
1076	>	final CountDownLatch threadsStarted = new CountDownLatch(p.getMaximumPoolSize());
1077	>	final CountDownLatch done = new CountDownLatch(1);
1078	>	final Runnable r = () -> {
1079	>	threadsStarted.countDown();
1080	>	for (;;) {
1081		try {
1070	–	p.execute(task);
1071	–	shouldThrow();
1072	–	} catch (RejectedExecutionException success) {}
1073	–	assertTrue(p.getTaskCount() <= 2);
1074	–	}
1075	–	done.countDown();
1076	–	}
1077	–	}
1078	–
1079	–	/**
1080	–	* submit(runnable) throws RejectedExecutionException if saturated.
1081	–	*/
1082	–	public void testSaturatedSubmitRunnable() {
1083	–	final ThreadPoolExecutor p =
1084	–	new ThreadPoolExecutor(1, 1,
1085	–	LONG_DELAY_MS, MILLISECONDS,
1086	–	new ArrayBlockingQueue<Runnable>(1));
1087	–	try (PoolCleaner cleaner = cleaner(p)) {
1088	–	final CountDownLatch done = new CountDownLatch(1);
1089	–	Runnable task = new CheckedRunnable() {
1090	–	public void realRun() throws InterruptedException {
1082		done.await();
1083	<	}};
1084	<	for (int i = 0; i < 2; ++i)
1085	<	p.submit(task);
1086	<	for (int i = 0; i < 2; ++i) {
1083	>	return;
1084	>	} catch (InterruptedException shutdownNowDeliberatelyIgnored) {}
1085	>	}};
1086	>	final Callable<Boolean> c = () -> {
1087	>	threadsStarted.countDown();
1088	>	for (;;) {
1089		try {
1097	–	p.execute(task);
1098	–	shouldThrow();
1099	–	} catch (RejectedExecutionException success) {}
1100	–	assertTrue(p.getTaskCount() <= 2);
1101	–	}
1102	–	done.countDown();
1103	–	}
1104	–	}
1105	–
1106	–	/**
1107	–	* submit(callable) throws RejectedExecutionException if saturated.
1108	–	*/
1109	–	public void testSaturatedSubmitCallable() {
1110	–	final ThreadPoolExecutor p =
1111	–	new ThreadPoolExecutor(1, 1,
1112	–	LONG_DELAY_MS, MILLISECONDS,
1113	–	new ArrayBlockingQueue<Runnable>(1));
1114	–	try (PoolCleaner cleaner = cleaner(p)) {
1115	–	final CountDownLatch done = new CountDownLatch(1);
1116	–	Runnable task = new CheckedRunnable() {
1117	–	public void realRun() throws InterruptedException {
1090		done.await();
1091	<	}};
1092	<	for (int i = 0; i < 2; ++i)
1093	<	p.submit(Executors.callable(task));
1094	<	for (int i = 0; i < 2; ++i) {
1095	<	try {
1096	<	p.execute(task);
1097	<	shouldThrow();
1098	<	} catch (RejectedExecutionException success) {}
1099	<	assertTrue(p.getTaskCount() <= 2);
1091	>	return Boolean.TRUE;
1092	>	} catch (InterruptedException shutdownNowDeliberatelyIgnored) {}
1093	>	}};
1094	>	final boolean shutdownNow = rnd.nextBoolean();
1095	>
1096	>	try (PoolCleaner cleaner = cleaner(p, done)) {
1097	>	// saturate
1098	>	for (int i = saturatedSize; i--> 0; ) {
1099	>	switch (rnd.nextInt(4)) {
1100	>	case 0: p.execute(r); break;
1101	>	case 1: assertFalse(p.submit(r).isDone()); break;
1102	>	case 2: assertFalse(p.submit(r, Boolean.TRUE).isDone()); break;
1103	>	case 3: assertFalse(p.submit(c).isDone()); break;
1104	>	}
1105		}
1129	–	done.countDown();
1130	–	}
1131	–	}
1106
1107	<	/**
1108	<	* executor using CallerRunsPolicy runs task if saturated.
1135	<	*/
1136	<	public void testSaturatedExecute2() {
1137	<	final ThreadPoolExecutor p =
1138	<	new ThreadPoolExecutor(1, 1,
1139	<	LONG_DELAY_MS,
1140	<	MILLISECONDS,
1141	<	new ArrayBlockingQueue<Runnable>(1),
1142	<	new ThreadPoolExecutor.CallerRunsPolicy());
1143	<	try (PoolCleaner cleaner = cleaner(p)) {
1144	<	final CountDownLatch done = new CountDownLatch(1);
1145	<	Runnable blocker = new CheckedRunnable() {
1146	<	public void realRun() throws InterruptedException {
1147	<	done.await();
1148	<	}};
1149	<	p.execute(blocker);
1150	<	TrackedNoOpRunnable[] tasks = new TrackedNoOpRunnable[5];
1151	<	for (int i = 0; i < tasks.length; i++)
1152	<	tasks[i] = new TrackedNoOpRunnable();
1153	<	for (int i = 0; i < tasks.length; i++)
1154	<	p.execute(tasks[i]);
1155	<	for (int i = 1; i < tasks.length; i++)
1156	<	assertTrue(tasks[i].done);
1157	<	assertFalse(tasks[0].done); // waiting in queue
1158	<	done.countDown();
1159	<	}
1160	<	}
1107	>	await(threadsStarted);
1108	>	assertTaskSubmissionsAreRejected(p);
1109
1110	<	/**
1111	<	* executor using DiscardPolicy drops task if saturated.
1112	<	*/
1113	<	public void testSaturatedExecute3() {
1114	<	final TrackedNoOpRunnable[] tasks = new TrackedNoOpRunnable[5];
1115	<	for (int i = 0; i < tasks.length; ++i)
1116	<	tasks[i] = new TrackedNoOpRunnable();
1169	<	final ThreadPoolExecutor p =
1170	<	new ThreadPoolExecutor(1, 1,
1171	<	LONG_DELAY_MS, MILLISECONDS,
1172	<	new ArrayBlockingQueue<Runnable>(1),
1173	<	new ThreadPoolExecutor.DiscardPolicy());
1174	<	try (PoolCleaner cleaner = cleaner(p)) {
1175	<	final CountDownLatch done = new CountDownLatch(1);
1176	<	p.execute(awaiter(done));
1110	>	if (shutdownNow)
1111	>	p.shutdownNow();
1112	>	else
1113	>	p.shutdown();
1114	>	// Pool is shutdown, but not yet terminated
1115	>	assertTaskSubmissionsAreRejected(p);
1116	>	assertFalse(p.isTerminated());
1117
1118	<	for (TrackedNoOpRunnable task : tasks)
1119	<	p.execute(task);
1120	<	for (int i = 1; i < tasks.length; i++)
1121	<	assertFalse(tasks[i].done);
1182	<	done.countDown();
1118	>	done.countDown();   // release blocking tasks
1119	>	assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
1120	>
1121	>	assertTaskSubmissionsAreRejected(p);
1122		}
1123	<	for (int i = 1; i < tasks.length; i++)
1124	<	assertFalse(tasks[i].done);
1125	<	assertTrue(tasks[0].done); // was waiting in queue
1123	>	assertEquals(saturatedSize(p)
1124	>	- (shutdownNow ? p.getQueue().remainingCapacity() : 0),
1125	>	p.getCompletedTaskCount());
1126		}
1127
1128		/**
1129		* executor using DiscardOldestPolicy drops oldest task if saturated.
1130		*/
1131	<	public void testSaturatedExecute4() {
1131	>	public void testSaturatedExecute_DiscardOldestPolicy() {
1132		final CountDownLatch done = new CountDownLatch(1);
1133		LatchAwaiter r1 = awaiter(done);
1134		LatchAwaiter r2 = awaiter(done);
#	Line 1198 | Line 1137 | public class ThreadPoolExecutorTest exte
1137		new ThreadPoolExecutor(1, 1,
1138		LONG_DELAY_MS, MILLISECONDS,
1139		new ArrayBlockingQueue<Runnable>(1),
1140	<	new ThreadPoolExecutor.DiscardOldestPolicy());
1141	<	try (PoolCleaner cleaner = cleaner(p)) {
1140	>	new DiscardOldestPolicy());
1141	>	try (PoolCleaner cleaner = cleaner(p, done)) {
1142		assertEquals(LatchAwaiter.NEW, r1.state);
1143		assertEquals(LatchAwaiter.NEW, r2.state);
1144		assertEquals(LatchAwaiter.NEW, r3.state);
#	Line 1209 | Line 1148 | public class ThreadPoolExecutorTest exte
1148		p.execute(r3);
1149		assertFalse(p.getQueue().contains(r2));
1150		assertTrue(p.getQueue().contains(r3));
1212	–	done.countDown();
1151		}
1152		assertEquals(LatchAwaiter.DONE, r1.state);
1153		assertEquals(LatchAwaiter.NEW, r2.state);
#	Line 1217 | Line 1155 | public class ThreadPoolExecutorTest exte
1155		}
1156
1157		/**
1220	–	* execute throws RejectedExecutionException if shutdown
1221	–	*/
1222	–	public void testRejectedExecutionExceptionOnShutdown() {
1223	–	final ThreadPoolExecutor p =
1224	–	new ThreadPoolExecutor(1, 1,
1225	–	LONG_DELAY_MS, MILLISECONDS,
1226	–	new ArrayBlockingQueue<Runnable>(1));
1227	–	try { p.shutdown(); } catch (SecurityException ok) { return; }
1228	–	try (PoolCleaner cleaner = cleaner(p)) {
1229	–	try {
1230	–	p.execute(new NoOpRunnable());
1231	–	shouldThrow();
1232	–	} catch (RejectedExecutionException success) {}
1233	–	}
1234	–	}
1235	–
1236	–	/**
1237	–	* execute using CallerRunsPolicy drops task on shutdown
1238	–	*/
1239	–	public void testCallerRunsOnShutdown() {
1240	–	RejectedExecutionHandler h = new ThreadPoolExecutor.CallerRunsPolicy();
1241	–	final ThreadPoolExecutor p =
1242	–	new ThreadPoolExecutor(1, 1,
1243	–	LONG_DELAY_MS, MILLISECONDS,
1244	–	new ArrayBlockingQueue<Runnable>(1), h);
1245	–
1246	–	try { p.shutdown(); } catch (SecurityException ok) { return; }
1247	–	try (PoolCleaner cleaner = cleaner(p)) {
1248	–	TrackedNoOpRunnable r = new TrackedNoOpRunnable();
1249	–	p.execute(r);
1250	–	assertFalse(r.done);
1251	–	}
1252	–	}
1253	–
1254	–	/**
1255	–	* execute using DiscardPolicy drops task on shutdown
1256	–	*/
1257	–	public void testDiscardOnShutdown() {
1258	–	final ThreadPoolExecutor p =
1259	–	new ThreadPoolExecutor(1, 1,
1260	–	LONG_DELAY_MS, MILLISECONDS,
1261	–	new ArrayBlockingQueue<Runnable>(1),
1262	–	new ThreadPoolExecutor.DiscardPolicy());
1263	–
1264	–	try { p.shutdown(); } catch (SecurityException ok) { return; }
1265	–	try (PoolCleaner cleaner = cleaner(p)) {
1266	–	TrackedNoOpRunnable r = new TrackedNoOpRunnable();
1267	–	p.execute(r);
1268	–	assertFalse(r.done);
1269	–	}
1270	–	}
1271	–
1272	–	/**
1158		* execute using DiscardOldestPolicy drops task on shutdown
1159		*/
1160		public void testDiscardOldestOnShutdown() {
#	Line 1277 | Line 1162 | public class ThreadPoolExecutorTest exte
1162		new ThreadPoolExecutor(1, 1,
1163		LONG_DELAY_MS, MILLISECONDS,
1164		new ArrayBlockingQueue<Runnable>(1),
1165	<	new ThreadPoolExecutor.DiscardOldestPolicy());
1165	>	new DiscardOldestPolicy());
1166
1167		try { p.shutdown(); } catch (SecurityException ok) { return; }
1168		try (PoolCleaner cleaner = cleaner(p)) {
#	Line 1288 | Line 1173 | public class ThreadPoolExecutorTest exte
1173		}
1174
1175		/**
1176	<	* execute(null) throws NPE
1176	>	* Submitting null tasks throws NullPointerException
1177		*/
1178	<	public void testExecuteNull() {
1178	>	public void testNullTaskSubmission() {
1179		final ThreadPoolExecutor p =
1180		new ThreadPoolExecutor(1, 2,
1181		1L, SECONDS,
1182		new ArrayBlockingQueue<Runnable>(10));
1183		try (PoolCleaner cleaner = cleaner(p)) {
1184	<	try {
1300	<	p.execute(null);
1301	<	shouldThrow();
1302	<	} catch (NullPointerException success) {}
1184	>	assertNullTaskSubmissionThrowsNullPointerException(p);
1185		}
1186		}
1187
#	Line 1491 | Line 1373 | public class ThreadPoolExecutorTest exte
1373		}
1374
1375		/**
1376	<	* invokeAny(empty collection) throws IAE
1376	>	* invokeAny(empty collection) throws IllegalArgumentException
1377		*/
1378		public void testInvokeAny2() throws Exception {
1379		final ExecutorService e =
#	Line 1516 | Line 1398 | public class ThreadPoolExecutorTest exte
1398		LONG_DELAY_MS, MILLISECONDS,
1399		new ArrayBlockingQueue<Runnable>(10));
1400		try (PoolCleaner cleaner = cleaner(e)) {
1401	<	List<Callable<String>> l = new ArrayList<Callable<String>>();
1401	>	List<Callable<String>> l = new ArrayList<>();
1402		l.add(latchAwaitingStringTask(latch));
1403		l.add(null);
1404		try {
#	Line 1536 | Line 1418 | public class ThreadPoolExecutorTest exte
1418		LONG_DELAY_MS, MILLISECONDS,
1419		new ArrayBlockingQueue<Runnable>(10));
1420		try (PoolCleaner cleaner = cleaner(e)) {
1421	<	List<Callable<String>> l = new ArrayList<Callable<String>>();
1421	>	List<Callable<String>> l = new ArrayList<>();
1422		l.add(new NPETask());
1423		try {
1424		e.invokeAny(l);
#	Line 1556 | Line 1438 | public class ThreadPoolExecutorTest exte
1438		LONG_DELAY_MS, MILLISECONDS,
1439		new ArrayBlockingQueue<Runnable>(10));
1440		try (PoolCleaner cleaner = cleaner(e)) {
1441	<	List<Callable<String>> l = new ArrayList<Callable<String>>();
1441	>	List<Callable<String>> l = new ArrayList<>();
1442		l.add(new StringTask());
1443		l.add(new StringTask());
1444		String result = e.invokeAny(l);
#	Line 1581 | Line 1463 | public class ThreadPoolExecutorTest exte
1463		}
1464
1465		/**
1466	<	* invokeAll(empty collection) returns empty collection
1466	>	* invokeAll(empty collection) returns empty list
1467		*/
1468		public void testInvokeAll2() throws InterruptedException {
1469		final ExecutorService e =
1470		new ThreadPoolExecutor(2, 2,
1471		LONG_DELAY_MS, MILLISECONDS,
1472		new ArrayBlockingQueue<Runnable>(10));
1473	+	final Collection<Callable<String>> emptyCollection
1474	+	= Collections.emptyList();
1475		try (PoolCleaner cleaner = cleaner(e)) {
1476	<	List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>());
1476	>	List<Future<String>> r = e.invokeAll(emptyCollection);
1477		assertTrue(r.isEmpty());
1478		}
1479		}
#	Line 1603 | Line 1487 | public class ThreadPoolExecutorTest exte
1487		LONG_DELAY_MS, MILLISECONDS,
1488		new ArrayBlockingQueue<Runnable>(10));
1489		try (PoolCleaner cleaner = cleaner(e)) {
1490	<	List<Callable<String>> l = new ArrayList<Callable<String>>();
1490	>	List<Callable<String>> l = new ArrayList<>();
1491		l.add(new StringTask());
1492		l.add(null);
1493		try {
#	Line 1622 | Line 1506 | public class ThreadPoolExecutorTest exte
1506		LONG_DELAY_MS, MILLISECONDS,
1507		new ArrayBlockingQueue<Runnable>(10));
1508		try (PoolCleaner cleaner = cleaner(e)) {
1509	<	List<Callable<String>> l = new ArrayList<Callable<String>>();
1509	>	List<Callable<String>> l = new ArrayList<>();
1510		l.add(new NPETask());
1511		List<Future<String>> futures = e.invokeAll(l);
1512		assertEquals(1, futures.size());
#	Line 1644 | Line 1528 | public class ThreadPoolExecutorTest exte
1528		LONG_DELAY_MS, MILLISECONDS,
1529		new ArrayBlockingQueue<Runnable>(10));
1530		try (PoolCleaner cleaner = cleaner(e)) {
1531	<	List<Callable<String>> l = new ArrayList<Callable<String>>();
1531	>	List<Callable<String>> l = new ArrayList<>();
1532		l.add(new StringTask());
1533		l.add(new StringTask());
1534		List<Future<String>> futures = e.invokeAll(l);
#	Line 1664 | Line 1548 | public class ThreadPoolExecutorTest exte
1548		new ArrayBlockingQueue<Runnable>(10));
1549		try (PoolCleaner cleaner = cleaner(e)) {
1550		try {
1551	<	e.invokeAny(null, MEDIUM_DELAY_MS, MILLISECONDS);
1551	>	e.invokeAny(null, randomTimeout(), randomTimeUnit());
1552		shouldThrow();
1553		} catch (NullPointerException success) {}
1554		}
#	Line 1679 | Line 1563 | public class ThreadPoolExecutorTest exte
1563		LONG_DELAY_MS, MILLISECONDS,
1564		new ArrayBlockingQueue<Runnable>(10));
1565		try (PoolCleaner cleaner = cleaner(e)) {
1566	<	List<Callable<String>> l = new ArrayList<Callable<String>>();
1566	>	List<Callable<String>> l = new ArrayList<>();
1567		l.add(new StringTask());
1568		try {
1569	<	e.invokeAny(l, MEDIUM_DELAY_MS, null);
1569	>	e.invokeAny(l, randomTimeout(), null);
1570		shouldThrow();
1571		} catch (NullPointerException success) {}
1572		}
1573		}
1574
1575		/**
1576	<	* timed invokeAny(empty collection) throws IAE
1576	>	* timed invokeAny(empty collection) throws IllegalArgumentException
1577		*/
1578		public void testTimedInvokeAny2() throws Exception {
1579		final ExecutorService e =
#	Line 1699 | Line 1583 | public class ThreadPoolExecutorTest exte
1583		try (PoolCleaner cleaner = cleaner(e)) {
1584		try {
1585		e.invokeAny(new ArrayList<Callable<String>>(),
1586	<	MEDIUM_DELAY_MS, MILLISECONDS);
1586	>	randomTimeout(), randomTimeUnit());
1587		shouldThrow();
1588		} catch (IllegalArgumentException success) {}
1589		}
1590		}
1591
1592		/**
1593	<	* timed invokeAny(c) throws NPE if c has null elements
1593	>	* timed invokeAny(c) throws NullPointerException if c has null elements
1594		*/
1595		public void testTimedInvokeAny3() throws Exception {
1596		final CountDownLatch latch = new CountDownLatch(1);
#	Line 1715 | Line 1599 | public class ThreadPoolExecutorTest exte
1599		LONG_DELAY_MS, MILLISECONDS,
1600		new ArrayBlockingQueue<Runnable>(10));
1601		try (PoolCleaner cleaner = cleaner(e)) {
1602	<	List<Callable<String>> l = new ArrayList<Callable<String>>();
1602	>	List<Callable<String>> l = new ArrayList<>();
1603		l.add(latchAwaitingStringTask(latch));
1604		l.add(null);
1605		try {
1606	<	e.invokeAny(l, MEDIUM_DELAY_MS, MILLISECONDS);
1606	>	e.invokeAny(l, randomTimeout(), randomTimeUnit());
1607		shouldThrow();
1608		} catch (NullPointerException success) {}
1609		latch.countDown();
#	Line 1735 | Line 1619 | public class ThreadPoolExecutorTest exte
1619		LONG_DELAY_MS, MILLISECONDS,
1620		new ArrayBlockingQueue<Runnable>(10));
1621		try (PoolCleaner cleaner = cleaner(e)) {
1622	<	List<Callable<String>> l = new ArrayList<Callable<String>>();
1622	>	long startTime = System.nanoTime();
1623	>	List<Callable<String>> l = new ArrayList<>();
1624		l.add(new NPETask());
1625		try {
1626	<	e.invokeAny(l, MEDIUM_DELAY_MS, MILLISECONDS);
1626	>	e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS);
1627		shouldThrow();
1628		} catch (ExecutionException success) {
1629		assertTrue(success.getCause() instanceof NullPointerException);
1630		}
1631	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1632		}
1633		}
1634
#	Line 1755 | Line 1641 | public class ThreadPoolExecutorTest exte
1641		LONG_DELAY_MS, MILLISECONDS,
1642		new ArrayBlockingQueue<Runnable>(10));
1643		try (PoolCleaner cleaner = cleaner(e)) {
1644	<	List<Callable<String>> l = new ArrayList<Callable<String>>();
1644	>	long startTime = System.nanoTime();
1645	>	List<Callable<String>> l = new ArrayList<>();
1646		l.add(new StringTask());
1647		l.add(new StringTask());
1648	<	String result = e.invokeAny(l, MEDIUM_DELAY_MS, MILLISECONDS);
1648	>	String result = e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS);
1649		assertSame(TEST_STRING, result);
1650	+	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
1651		}
1652		}
1653
#	Line 1773 | Line 1661 | public class ThreadPoolExecutorTest exte
1661		new ArrayBlockingQueue<Runnable>(10));
1662		try (PoolCleaner cleaner = cleaner(e)) {
1663		try {
1664	<	e.invokeAll(null, MEDIUM_DELAY_MS, MILLISECONDS);
1664	>	e.invokeAll(null, randomTimeout(), randomTimeUnit());
1665		shouldThrow();
1666		} catch (NullPointerException success) {}
1667		}
#	Line 1788 | Line 1676 | public class ThreadPoolExecutorTest exte
1676		LONG_DELAY_MS, MILLISECONDS,
1677		new ArrayBlockingQueue<Runnable>(10));
1678		try (PoolCleaner cleaner = cleaner(e)) {
1679	<	List<Callable<String>> l = new ArrayList<Callable<String>>();
1679	>	List<Callable<String>> l = new ArrayList<>();
1680		l.add(new StringTask());
1681		try {
1682	<	e.invokeAll(l, MEDIUM_DELAY_MS, null);
1682	>	e.invokeAll(l, randomTimeout(), null);
1683		shouldThrow();
1684		} catch (NullPointerException success) {}
1685		}
1686		}
1687
1688		/**
1689	<	* timed invokeAll(empty collection) returns empty collection
1689	>	* timed invokeAll(empty collection) returns empty list
1690		*/
1691		public void testTimedInvokeAll2() throws InterruptedException {
1692		final ExecutorService e =
1693		new ThreadPoolExecutor(2, 2,
1694		LONG_DELAY_MS, MILLISECONDS,
1695		new ArrayBlockingQueue<Runnable>(10));
1696	+	final Collection<Callable<String>> emptyCollection
1697	+	= Collections.emptyList();
1698		try (PoolCleaner cleaner = cleaner(e)) {
1699	<	List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>(),
1700	<	MEDIUM_DELAY_MS, MILLISECONDS);
1699	>	List<Future<String>> r =
1700	>	e.invokeAll(emptyCollection, randomTimeout(), randomTimeUnit());
1701		assertTrue(r.isEmpty());
1702		}
1703		}
#	Line 1821 | Line 1711 | public class ThreadPoolExecutorTest exte
1711		LONG_DELAY_MS, MILLISECONDS,
1712		new ArrayBlockingQueue<Runnable>(10));
1713		try (PoolCleaner cleaner = cleaner(e)) {
1714	<	List<Callable<String>> l = new ArrayList<Callable<String>>();
1714	>	List<Callable<String>> l = new ArrayList<>();
1715		l.add(new StringTask());
1716		l.add(null);
1717		try {
1718	<	e.invokeAll(l, MEDIUM_DELAY_MS, MILLISECONDS);
1718	>	e.invokeAll(l, randomTimeout(), randomTimeUnit());
1719		shouldThrow();
1720		} catch (NullPointerException success) {}
1721		}
#	Line 1840 | Line 1730 | public class ThreadPoolExecutorTest exte
1730		LONG_DELAY_MS, MILLISECONDS,
1731		new ArrayBlockingQueue<Runnable>(10));
1732		try (PoolCleaner cleaner = cleaner(e)) {
1733	<	List<Callable<String>> l = new ArrayList<Callable<String>>();
1733	>	List<Callable<String>> l = new ArrayList<>();
1734		l.add(new NPETask());
1735		List<Future<String>> futures =
1736		e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS);
#	Line 1863 | Line 1753 | public class ThreadPoolExecutorTest exte
1753		LONG_DELAY_MS, MILLISECONDS,
1754		new ArrayBlockingQueue<Runnable>(10));
1755		try (PoolCleaner cleaner = cleaner(e)) {
1756	<	List<Callable<String>> l = new ArrayList<Callable<String>>();
1756	>	List<Callable<String>> l = new ArrayList<>();
1757		l.add(new StringTask());
1758		l.add(new StringTask());
1759		List<Future<String>> futures =
#	Line 1878 | Line 1768 | public class ThreadPoolExecutorTest exte
1768		* timed invokeAll(c) cancels tasks not completed by timeout
1769		*/
1770		public void testTimedInvokeAll6() throws Exception {
1771	<	final ExecutorService e =
1772	<	new ThreadPoolExecutor(2, 2,
1773	<	LONG_DELAY_MS, MILLISECONDS,
1774	<	new ArrayBlockingQueue<Runnable>(10));
1775	<	try (PoolCleaner cleaner = cleaner(e)) {
1776	<	for (long timeout = timeoutMillis();;) {
1771	>	for (long timeout = timeoutMillis();;) {
1772	>	final CountDownLatch done = new CountDownLatch(1);
1773	>	final Callable<String> waiter = new CheckedCallable<String>() {
1774	>	public String realCall() {
1775	>	try { done.await(LONG_DELAY_MS, MILLISECONDS); }
1776	>	catch (InterruptedException ok) {}
1777	>	return "1"; }};
1778	>	final ExecutorService p =
1779	>	new ThreadPoolExecutor(2, 2,
1780	>	LONG_DELAY_MS, MILLISECONDS,
1781	>	new ArrayBlockingQueue<Runnable>(10));
1782	>	try (PoolCleaner cleaner = cleaner(p, done)) {
1783		List<Callable<String>> tasks = new ArrayList<>();
1784		tasks.add(new StringTask("0"));
1785	<	tasks.add(Executors.callable(new LongPossiblyInterruptedRunnable(), TEST_STRING));
1785	>	tasks.add(waiter);
1786		tasks.add(new StringTask("2"));
1787		long startTime = System.nanoTime();
1788		List<Future<String>> futures =
1789	<	e.invokeAll(tasks, timeout, MILLISECONDS);
1789	>	p.invokeAll(tasks, timeout, MILLISECONDS);
1790		assertEquals(tasks.size(), futures.size());
1791		assertTrue(millisElapsedSince(startTime) >= timeout);
1792		for (Future future : futures)
#	Line 1927 | Line 1823 | public class ThreadPoolExecutorTest exte
1823		public void realRun() {
1824		done.countDown();
1825		}});
1826	<	assertTrue(done.await(LONG_DELAY_MS, MILLISECONDS));
1826	>	await(done);
1827		}
1828		}
1829
#	Line 2020 | Line 1916 | public class ThreadPoolExecutorTest exte
1916		}
1917		}
1918		// enough time to run all tasks
1919	<	assertTrue(done.await(nTasks * SHORT_DELAY_MS, MILLISECONDS));
1919	>	await(done, nTasks * SHORT_DELAY_MS);
1920		}
1921		}
1922
#	Line 2028 | Line 1924 | public class ThreadPoolExecutorTest exte
1924		* get(cancelled task) throws CancellationException
1925		*/
1926		public void testGet_cancelled() throws Exception {
1927	+	final CountDownLatch done = new CountDownLatch(1);
1928		final ExecutorService e =
1929		new ThreadPoolExecutor(1, 1,
1930		LONG_DELAY_MS, MILLISECONDS,
1931		new LinkedBlockingQueue<Runnable>());
1932	<	try (PoolCleaner cleaner = cleaner(e)) {
1932	>	try (PoolCleaner cleaner = cleaner(e, done)) {
1933		final CountDownLatch blockerStarted = new CountDownLatch(1);
2037	–	final CountDownLatch done = new CountDownLatch(1);
1934		final List<Future<?>> futures = new ArrayList<>();
1935		for (int i = 0; i < 2; i++) {
1936		Runnable r = new CheckedRunnable() { public void realRun()
#	Line 2044 | Line 1940 | public class ThreadPoolExecutorTest exte
1940		}};
1941		futures.add(e.submit(r));
1942		}
1943	<	assertTrue(blockerStarted.await(LONG_DELAY_MS, MILLISECONDS));
1943	>	await(blockerStarted);
1944		for (Future<?> future : futures) future.cancel(false);
1945		for (Future<?> future : futures) {
1946		try {
#	Line 2058 | Line 1954 | public class ThreadPoolExecutorTest exte
1954		assertTrue(future.isCancelled());
1955		assertTrue(future.isDone());
1956		}
1957	<	done.countDown();
1957	>	}
1958	>	}
1959	>
1960	>	/** Directly test simple ThreadPoolExecutor RejectedExecutionHandlers. */
1961	>	public void testStandardRejectedExecutionHandlers() {
1962	>	final ThreadPoolExecutor p =
1963	>	new ThreadPoolExecutor(1, 1, 1, SECONDS,
1964	>	new ArrayBlockingQueue<Runnable>(1));
1965	>	final AtomicReference<Thread> thread = new AtomicReference<>();
1966	>	final Runnable r = new Runnable() { public void run() {
1967	>	thread.set(Thread.currentThread()); }};
1968	>
1969	>	try {
1970	>	new AbortPolicy().rejectedExecution(r, p);
1971	>	shouldThrow();
1972	>	} catch (RejectedExecutionException success) {}
1973	>	assertNull(thread.get());
1974	>
1975	>	new DiscardPolicy().rejectedExecution(r, p);
1976	>	assertNull(thread.get());
1977	>
1978	>	new CallerRunsPolicy().rejectedExecution(r, p);
1979	>	assertSame(Thread.currentThread(), thread.get());
1980	>
1981	>	// check that pool was not perturbed by handlers
1982	>	assertTrue(p.getRejectedExecutionHandler() instanceof AbortPolicy);
1983	>	assertEquals(0, p.getTaskCount());
1984	>	assertTrue(p.getQueue().isEmpty());
1985	>	}
1986	>
1987	>	public void testThreadFactoryReturnsTerminatedThread_shouldThrow() {
1988	>	if (!testImplementationDetails)
1989	>	return;
1990	>
1991	>	ThreadFactory returnsTerminatedThread = runnableIgnored -> {
1992	>	Thread thread = new Thread(() -> {});
1993	>	thread.start();
1994	>	try { thread.join(); }
1995	>	catch (InterruptedException ex) { throw new Error(ex); }
1996	>	return thread;
1997	>	};
1998	>	ThreadPoolExecutor p =
1999	>	new ThreadPoolExecutor(1, 1, 1, SECONDS,
2000	>	new ArrayBlockingQueue<Runnable>(1),
2001	>	returnsTerminatedThread);
2002	>	try (PoolCleaner cleaner = cleaner(p)) {
2003	>	assertThrows(IllegalThreadStateException.class,
2004	>	() -> p.execute(() -> {}));
2005	>	}
2006	>	}
2007	>
2008	>	public void testThreadFactoryReturnsStartedThread_shouldThrow() {
2009	>	if (!testImplementationDetails)
2010	>	return;
2011	>
2012	>	CountDownLatch latch = new CountDownLatch(1);
2013	>	Runnable awaitLatch = () -> {
2014	>	try { latch.await(); }
2015	>	catch (InterruptedException ex) { throw new Error(ex); }};
2016	>	ThreadFactory returnsStartedThread = runnable -> {
2017	>	Thread thread = new Thread(awaitLatch);
2018	>	thread.start();
2019	>	return thread;
2020	>	};
2021	>	ThreadPoolExecutor p =
2022	>	new ThreadPoolExecutor(1, 1, 1, SECONDS,
2023	>	new ArrayBlockingQueue<Runnable>(1),
2024	>	returnsStartedThread);
2025	>	try (PoolCleaner cleaner = cleaner(p)) {
2026	>	assertThrows(IllegalThreadStateException.class,
2027	>	() -> p.execute(() -> {}));
2028	>	latch.countDown();
2029		}
2030		}
2031

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