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

Comparing jsr166/src/test/tck/ExecutorsTest.java (file contents):
Revision 1.36 by jsr166, Tue Nov 9 15:29:11 2010 UTC vs.
Revision 1.53 by jsr166, Sat Feb 1 17:44:35 2020 UTC

#	Line 1 | Line 1
1		/*
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/licenses/publicdomain
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
8
9	–
10	–	import junit.framework.*;
11	–	import java.util.*;
12	–	import java.util.concurrent.*;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	<	import java.math.BigInteger;
11	<	import java.security.*;
10	>
11	>	import java.security.AccessControlContext;
12	>	import java.security.AccessControlException;
13	>	import java.security.AccessController;
14	>	import java.security.PrivilegedAction;
15	>	import java.security.PrivilegedExceptionAction;
16	>	import java.util.ArrayList;
17	>	import java.util.List;
18	>	import java.util.concurrent.Callable;
19	>	import java.util.concurrent.CountDownLatch;
20	>	import java.util.concurrent.Executors;
21	>	import java.util.concurrent.ExecutorService;
22	>	import java.util.concurrent.Future;
23	>	import java.util.concurrent.ScheduledExecutorService;
24	>	import java.util.concurrent.ThreadPoolExecutor;
25	>
26	>	import junit.framework.Test;
27	>	import junit.framework.TestSuite;
28
29		public class ExecutorsTest extends JSR166TestCase {
30		public static void main(String[] args) {
31	<	junit.textui.TestRunner.run(suite());
31	>	main(suite(), args);
32		}
33		public static Test suite() {
34		return new TestSuite(ExecutorsTest.class);
#	Line 26 | Line 38 | public class ExecutorsTest extends JSR16
38		* A newCachedThreadPool can execute runnables
39		*/
40		public void testNewCachedThreadPool1() {
41	<	ExecutorService e = Executors.newCachedThreadPool();
42	<	e.execute(new NoOpRunnable());
43	<	e.execute(new NoOpRunnable());
44	<	e.execute(new NoOpRunnable());
45	<	joinPool(e);
41	>	final ExecutorService e = Executors.newCachedThreadPool();
42	>	try (PoolCleaner cleaner = cleaner(e)) {
43	>	e.execute(new NoOpRunnable());
44	>	e.execute(new NoOpRunnable());
45	>	e.execute(new NoOpRunnable());
46	>	}
47		}
48
49		/**
50		* A newCachedThreadPool with given ThreadFactory can execute runnables
51		*/
52		public void testNewCachedThreadPool2() {
53	<	ExecutorService e = Executors.newCachedThreadPool(new SimpleThreadFactory());
54	<	e.execute(new NoOpRunnable());
55	<	e.execute(new NoOpRunnable());
56	<	e.execute(new NoOpRunnable());
57	<	joinPool(e);
53	>	final ExecutorService e = Executors.newCachedThreadPool(new SimpleThreadFactory());
54	>	try (PoolCleaner cleaner = cleaner(e)) {
55	>	e.execute(new NoOpRunnable());
56	>	e.execute(new NoOpRunnable());
57	>	e.execute(new NoOpRunnable());
58	>	}
59		}
60
61		/**
#	Line 49 | Line 63 | public class ExecutorsTest extends JSR16
63		*/
64		public void testNewCachedThreadPool3() {
65		try {
66	<	ExecutorService e = Executors.newCachedThreadPool(null);
66	>	ExecutorService unused = Executors.newCachedThreadPool(null);
67		shouldThrow();
68		} catch (NullPointerException success) {}
69		}
70
57	–
71		/**
72		* A new SingleThreadExecutor can execute runnables
73		*/
74		public void testNewSingleThreadExecutor1() {
75	<	ExecutorService e = Executors.newSingleThreadExecutor();
76	<	e.execute(new NoOpRunnable());
77	<	e.execute(new NoOpRunnable());
78	<	e.execute(new NoOpRunnable());
79	<	joinPool(e);
75	>	final ExecutorService e = Executors.newSingleThreadExecutor();
76	>	try (PoolCleaner cleaner = cleaner(e)) {
77	>	e.execute(new NoOpRunnable());
78	>	e.execute(new NoOpRunnable());
79	>	e.execute(new NoOpRunnable());
80	>	}
81		}
82
83		/**
84		* A new SingleThreadExecutor with given ThreadFactory can execute runnables
85		*/
86		public void testNewSingleThreadExecutor2() {
87	<	ExecutorService e = Executors.newSingleThreadExecutor(new SimpleThreadFactory());
88	<	e.execute(new NoOpRunnable());
89	<	e.execute(new NoOpRunnable());
90	<	e.execute(new NoOpRunnable());
91	<	joinPool(e);
87	>	final ExecutorService e = Executors.newSingleThreadExecutor(new SimpleThreadFactory());
88	>	try (PoolCleaner cleaner = cleaner(e)) {
89	>	e.execute(new NoOpRunnable());
90	>	e.execute(new NoOpRunnable());
91	>	e.execute(new NoOpRunnable());
92	>	}
93		}
94
95		/**
#	Line 82 | Line 97 | public class ExecutorsTest extends JSR16
97		*/
98		public void testNewSingleThreadExecutor3() {
99		try {
100	<	ExecutorService e = Executors.newSingleThreadExecutor(null);
100	>	ExecutorService unused = Executors.newSingleThreadExecutor(null);
101		shouldThrow();
102		} catch (NullPointerException success) {}
103		}
#	Line 91 | Line 106 | public class ExecutorsTest extends JSR16
106		* A new SingleThreadExecutor cannot be casted to concrete implementation
107		*/
108		public void testCastNewSingleThreadExecutor() {
109	<	ExecutorService e = Executors.newSingleThreadExecutor();
110	<	try {
111	<	ThreadPoolExecutor tpe = (ThreadPoolExecutor)e;
112	<	shouldThrow();
113	<	} catch (ClassCastException success) {
114	<	} finally {
100	<	joinPool(e);
109	>	final ExecutorService e = Executors.newSingleThreadExecutor();
110	>	try (PoolCleaner cleaner = cleaner(e)) {
111	>	try {
112	>	ThreadPoolExecutor tpe = (ThreadPoolExecutor)e;
113	>	shouldThrow();
114	>	} catch (ClassCastException success) {}
115		}
116		}
117
104	–
118		/**
119		* A new newFixedThreadPool can execute runnables
120		*/
121		public void testNewFixedThreadPool1() {
122	<	ExecutorService e = Executors.newFixedThreadPool(2);
123	<	e.execute(new NoOpRunnable());
124	<	e.execute(new NoOpRunnable());
125	<	e.execute(new NoOpRunnable());
126	<	joinPool(e);
122	>	final ExecutorService e = Executors.newFixedThreadPool(2);
123	>	try (PoolCleaner cleaner = cleaner(e)) {
124	>	e.execute(new NoOpRunnable());
125	>	e.execute(new NoOpRunnable());
126	>	e.execute(new NoOpRunnable());
127	>	}
128		}
129
130		/**
131		* A new newFixedThreadPool with given ThreadFactory can execute runnables
132		*/
133		public void testNewFixedThreadPool2() {
134	<	ExecutorService e = Executors.newFixedThreadPool(2, new SimpleThreadFactory());
135	<	e.execute(new NoOpRunnable());
136	<	e.execute(new NoOpRunnable());
137	<	e.execute(new NoOpRunnable());
138	<	joinPool(e);
134	>	final ExecutorService e = Executors.newFixedThreadPool(2, new SimpleThreadFactory());
135	>	try (PoolCleaner cleaner = cleaner(e)) {
136	>	e.execute(new NoOpRunnable());
137	>	e.execute(new NoOpRunnable());
138	>	e.execute(new NoOpRunnable());
139	>	}
140		}
141
142		/**
143	<	* A new newFixedThreadPool with null ThreadFactory throws NPE
143	>	* A new newFixedThreadPool with null ThreadFactory throws
144	>	* NullPointerException
145		*/
146		public void testNewFixedThreadPool3() {
147		try {
148	<	ExecutorService e = Executors.newFixedThreadPool(2, null);
148	>	ExecutorService unused = Executors.newFixedThreadPool(2, null);
149		shouldThrow();
150		} catch (NullPointerException success) {}
151		}
152
153		/**
154	<	* A new newFixedThreadPool with 0 threads throws IAE
154	>	* A new newFixedThreadPool with 0 threads throws IllegalArgumentException
155		*/
156		public void testNewFixedThreadPool4() {
157		try {
158	<	ExecutorService e = Executors.newFixedThreadPool(0);
158	>	ExecutorService unused = Executors.newFixedThreadPool(0);
159		shouldThrow();
160		} catch (IllegalArgumentException success) {}
161		}
162
147	–
163		/**
164		* An unconfigurable newFixedThreadPool can execute runnables
165		*/
166	<	public void testunconfigurableExecutorService() {
167	<	ExecutorService e = Executors.unconfigurableExecutorService(Executors.newFixedThreadPool(2));
168	<	e.execute(new NoOpRunnable());
169	<	e.execute(new NoOpRunnable());
170	<	e.execute(new NoOpRunnable());
171	<	joinPool(e);
166	>	public void testUnconfigurableExecutorService() {
167	>	final ExecutorService e = Executors.unconfigurableExecutorService(Executors.newFixedThreadPool(2));
168	>	try (PoolCleaner cleaner = cleaner(e)) {
169	>	e.execute(new NoOpRunnable());
170	>	e.execute(new NoOpRunnable());
171	>	e.execute(new NoOpRunnable());
172	>	}
173		}
174
175		/**
176		* unconfigurableExecutorService(null) throws NPE
177		*/
178	<	public void testunconfigurableExecutorServiceNPE() {
178	>	public void testUnconfigurableExecutorServiceNPE() {
179		try {
180	<	ExecutorService e = Executors.unconfigurableExecutorService(null);
180	>	ExecutorService unused =
181	>	Executors.unconfigurableExecutorService(null);
182		shouldThrow();
183		} catch (NullPointerException success) {}
184		}
#	Line 169 | Line 186 | public class ExecutorsTest extends JSR16
186		/**
187		* unconfigurableScheduledExecutorService(null) throws NPE
188		*/
189	<	public void testunconfigurableScheduledExecutorServiceNPE() {
189	>	public void testUnconfigurableScheduledExecutorServiceNPE() {
190		try {
191	<	ExecutorService e = Executors.unconfigurableScheduledExecutorService(null);
191	>	ExecutorService unused =
192	>	Executors.unconfigurableScheduledExecutorService(null);
193		shouldThrow();
194		} catch (NullPointerException success) {}
195		}
196
179	–
197		/**
198		* a newSingleThreadScheduledExecutor successfully runs delayed task
199		*/
200		public void testNewSingleThreadScheduledExecutor() throws Exception {
201	<	ScheduledExecutorService p = Executors.newSingleThreadScheduledExecutor();
202	<	try {
203	<	final CountDownLatch done = new CountDownLatch(1);
201	>	final ScheduledExecutorService p = Executors.newSingleThreadScheduledExecutor();
202	>	try (PoolCleaner cleaner = cleaner(p)) {
203	>	final CountDownLatch proceed = new CountDownLatch(1);
204		final Runnable task = new CheckedRunnable() {
205		public void realRun() {
206	<	done.countDown();
206	>	await(proceed);
207		}};
208	+	long startTime = System.nanoTime();
209		Future f = p.schedule(Executors.callable(task, Boolean.TRUE),
210	<	SHORT_DELAY_MS, MILLISECONDS);
210	>	timeoutMillis(), MILLISECONDS);
211		assertFalse(f.isDone());
212	<	assertTrue(done.await(MEDIUM_DELAY_MS, MILLISECONDS));
213	<	assertSame(Boolean.TRUE, f.get(SMALL_DELAY_MS, MILLISECONDS));
212	>	proceed.countDown();
213	>	assertSame(Boolean.TRUE, f.get(LONG_DELAY_MS, MILLISECONDS));
214		assertSame(Boolean.TRUE, f.get());
215		assertTrue(f.isDone());
216	<	} finally {
217	<	joinPool(p);
216	>	assertFalse(f.isCancelled());
217	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
218		}
219		}
220
221		/**
222		* a newScheduledThreadPool successfully runs delayed task
223		*/
224	<	public void testnewScheduledThreadPool() throws Exception {
225	<	ScheduledExecutorService p = Executors.newScheduledThreadPool(2);
226	<	try {
227	<	final CountDownLatch done = new CountDownLatch(1);
224	>	public void testNewScheduledThreadPool() throws Exception {
225	>	final ScheduledExecutorService p = Executors.newScheduledThreadPool(2);
226	>	try (PoolCleaner cleaner = cleaner(p)) {
227	>	final CountDownLatch proceed = new CountDownLatch(1);
228		final Runnable task = new CheckedRunnable() {
229		public void realRun() {
230	<	done.countDown();
230	>	await(proceed);
231		}};
232	+	long startTime = System.nanoTime();
233		Future f = p.schedule(Executors.callable(task, Boolean.TRUE),
234	<	SHORT_DELAY_MS, MILLISECONDS);
234	>	timeoutMillis(), MILLISECONDS);
235		assertFalse(f.isDone());
236	<	assertTrue(done.await(MEDIUM_DELAY_MS, MILLISECONDS));
237	<	assertSame(Boolean.TRUE, f.get(SMALL_DELAY_MS, MILLISECONDS));
236	>	proceed.countDown();
237	>	assertSame(Boolean.TRUE, f.get(LONG_DELAY_MS, MILLISECONDS));
238		assertSame(Boolean.TRUE, f.get());
239		assertTrue(f.isDone());
240	<	} finally {
241	<	joinPool(p);
240	>	assertFalse(f.isCancelled());
241	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
242		}
243		}
244
245		/**
246		* an unconfigurable newScheduledThreadPool successfully runs delayed task
247		*/
248	<	public void testunconfigurableScheduledExecutorService() throws Exception {
249	<	ScheduledExecutorService p =
248	>	public void testUnconfigurableScheduledExecutorService() throws Exception {
249	>	final ScheduledExecutorService p =
250		Executors.unconfigurableScheduledExecutorService
251		(Executors.newScheduledThreadPool(2));
252	<	try {
253	<	final CountDownLatch done = new CountDownLatch(1);
252	>	try (PoolCleaner cleaner = cleaner(p)) {
253	>	final CountDownLatch proceed = new CountDownLatch(1);
254		final Runnable task = new CheckedRunnable() {
255		public void realRun() {
256	<	done.countDown();
256	>	await(proceed);
257		}};
258	+	long startTime = System.nanoTime();
259		Future f = p.schedule(Executors.callable(task, Boolean.TRUE),
260	<	SHORT_DELAY_MS, MILLISECONDS);
260	>	timeoutMillis(), MILLISECONDS);
261		assertFalse(f.isDone());
262	<	assertTrue(done.await(MEDIUM_DELAY_MS, MILLISECONDS));
263	<	assertSame(Boolean.TRUE, f.get(SMALL_DELAY_MS, MILLISECONDS));
262	>	proceed.countDown();
263	>	assertSame(Boolean.TRUE, f.get(LONG_DELAY_MS, MILLISECONDS));
264		assertSame(Boolean.TRUE, f.get());
265		assertTrue(f.isDone());
266	<	} finally {
267	<	joinPool(p);
266	>	assertFalse(f.isCancelled());
267	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
268		}
269		}
270
#	Line 252 | Line 272 | public class ExecutorsTest extends JSR16
272		* Future.get on submitted tasks will time out if they compute too long.
273		*/
274		public void testTimedCallable() throws Exception {
275	<	final Runnable sleeper = new CheckedInterruptedRunnable() {
275	>	final ExecutorService[] executors = {
276	>	Executors.newSingleThreadExecutor(),
277	>	Executors.newCachedThreadPool(),
278	>	Executors.newFixedThreadPool(2),
279	>	Executors.newScheduledThreadPool(2),
280	>	};
281	>
282	>	final Runnable sleeper = new CheckedRunnable() {
283		public void realRun() throws InterruptedException {
257	–	Thread.sleep(LONG_DELAY_MS);
258	–	}};
259	–	for (ExecutorService executor :
260	–	new ExecutorService[] {
261	–	Executors.newSingleThreadExecutor(),
262	–	Executors.newCachedThreadPool(),
263	–	Executors.newFixedThreadPool(2),
264	–	Executors.newScheduledThreadPool(2),
265	–	}) {
266	–	try {
267	–	Future future = executor.submit(sleeper);
284		try {
285	<	future.get(SHORT_DELAY_MS, MILLISECONDS);
286	<	shouldThrow();
271	<	} catch (TimeoutException success) {
272	<	} finally {
273	<	future.cancel(true);
285	>	delay(LONG_DELAY_MS);
286	>	} catch (InterruptedException OK) {
287		}
288	<	}
289	<	finally {
290	<	joinPool(executor);
291	<	}
288	>	}};
289	>
290	>	List<Thread> threads = new ArrayList<>();
291	>	for (final ExecutorService executor : executors) {
292	>	threads.add(newStartedThread(new CheckedRunnable() {
293	>	public void realRun() {
294	>	Future future = executor.submit(sleeper);
295	>	assertFutureTimesOut(future);
296	>	}}));
297		}
298	+	for (Thread thread : threads)
299	+	awaitTermination(thread);
300	+	for (ExecutorService executor : executors)
301	+	executor.shutdownNow(); // assumes shutdownNow interrupts threads
302	+	for (ExecutorService executor : executors)
303	+	joinPool(executor);
304		}
305
282	–
306		/**
307		* ThreadPoolExecutor using defaultThreadFactory has
308		* specified group, priority, daemon status, and name
309		*/
310		public void testDefaultThreadFactory() throws Exception {
311		final ThreadGroup egroup = Thread.currentThread().getThreadGroup();
312	+	final CountDownLatch done = new CountDownLatch(1);
313		Runnable r = new CheckedRunnable() {
314		public void realRun() {
315		try {
316		Thread current = Thread.currentThread();
317	<	assertTrue(!current.isDaemon());
317	>	assertFalse(current.isDaemon());
318		assertTrue(current.getPriority() <= Thread.NORM_PRIORITY);
295	–	ThreadGroup g = current.getThreadGroup();
319		SecurityManager s = System.getSecurityManager();
320	<	if (s != null)
321	<	assertTrue(g == s.getThreadGroup());
322	<	else
300	<	assertTrue(g == egroup);
301	<	String name = current.getName();
302	<	assertTrue(name.endsWith("thread-1"));
320	>	assertSame(current.getThreadGroup(),
321	>	(s == null) ? egroup : s.getThreadGroup());
322	>	assertTrue(current.getName().endsWith("thread-1"));
323		} catch (SecurityException ok) {
324		// Also pass if not allowed to change setting
325		}
326	+	done.countDown();
327		}};
328		ExecutorService e = Executors.newSingleThreadExecutor(Executors.defaultThreadFactory());
329	<
330	<	e.execute(r);
331	<	try {
311	<	e.shutdown();
312	<	} catch (SecurityException ok) {
313	<	}
314	<
315	<	try {
316	<	Thread.sleep(SHORT_DELAY_MS);
317	<	} finally {
318	<	joinPool(e);
329	>	try (PoolCleaner cleaner = cleaner(e)) {
330	>	e.execute(r);
331	>	await(done);
332		}
333		}
334
#	Line 325 | Line 338 | public class ExecutorsTest extends JSR16
338		* access control context and context class loader
339		*/
340		public void testPrivilegedThreadFactory() throws Exception {
341	+	final CountDownLatch done = new CountDownLatch(1);
342		Runnable r = new CheckedRunnable() {
343		public void realRun() throws Exception {
344		final ThreadGroup egroup = Thread.currentThread().getThreadGroup();
#	Line 333 | Line 347 | public class ExecutorsTest extends JSR16
347		Runnable r = new CheckedRunnable() {
348		public void realRun() {
349		Thread current = Thread.currentThread();
350	<	assertTrue(!current.isDaemon());
350	>	assertFalse(current.isDaemon());
351		assertTrue(current.getPriority() <= Thread.NORM_PRIORITY);
338	–	ThreadGroup g = current.getThreadGroup();
352		SecurityManager s = System.getSecurityManager();
353	<	if (s != null)
354	<	assertTrue(g == s.getThreadGroup());
355	<	else
343	<	assertTrue(g == egroup);
344	<	String name = current.getName();
345	<	assertTrue(name.endsWith("thread-1"));
353	>	assertSame(current.getThreadGroup(),
354	>	(s == null) ? egroup : s.getThreadGroup());
355	>	assertTrue(current.getName().endsWith("thread-1"));
356		assertSame(thisccl, current.getContextClassLoader());
357		assertEquals(thisacc, AccessController.getContext());
358	+	done.countDown();
359		}};
360		ExecutorService e = Executors.newSingleThreadExecutor(Executors.privilegedThreadFactory());
361	<	e.execute(r);
362	<	e.shutdown();
363	<	Thread.sleep(SHORT_DELAY_MS);
364	<	joinPool(e);
361	>	try (PoolCleaner cleaner = cleaner(e)) {
362	>	e.execute(r);
363	>	await(done);
364	>	}
365		}};
366
367		runWithPermissions(r,
#	Line 387 | Line 398 | public class ExecutorsTest extends JSR16
398		}
399		}
400
390	–
401		/**
402		* Without class loader permissions, creating
403		* privilegedCallableUsingCurrentClassLoader throws ACE
#	Line 410 | Line 420 | public class ExecutorsTest extends JSR16
420		* With class loader permissions, calling
421		* privilegedCallableUsingCurrentClassLoader does not throw ACE
422		*/
423	<	public void testprivilegedCallableUsingCCLWithPrivs() throws Exception {
423	>	public void testPrivilegedCallableUsingCCLWithPrivs() throws Exception {
424		Runnable r = new CheckedRunnable() {
425		public void realRun() throws Exception {
426		Executors.privilegedCallableUsingCurrentClassLoader
#	Line 426 | Line 436 | public class ExecutorsTest extends JSR16
436		/**
437		* Without permissions, calling privilegedCallable throws ACE
438		*/
439	<	public void testprivilegedCallableWithNoPrivs() throws Exception {
439	>	public void testPrivilegedCallableWithNoPrivs() throws Exception {
440		// Avoid classloader-related SecurityExceptions in swingui.TestRunner
441		Executors.privilegedCallable(new CheckCCL());
442
#	Line 498 | Line 508 | public class ExecutorsTest extends JSR16
508		/**
509		* With permissions, calling privilegedCallable succeeds
510		*/
511	<	public void testprivilegedCallableWithPrivs() throws Exception {
511	>	public void testPrivilegedCallableWithPrivs() throws Exception {
512		Runnable r = new CheckedRunnable() {
513		public void realRun() throws Exception {
514		Executors.privilegedCallable(new CheckCCL()).call();
515		}};
516
517	<	runWithPermissions(r,
517	>	runWithPermissions(r,
518		new RuntimePermission("getClassLoader"),
519		new RuntimePermission("setContextClassLoader"));
520		}
#	Line 543 | Line 553 | public class ExecutorsTest extends JSR16
553		assertSame(one, c.call());
554		}
555
546	–
556		/**
557		* callable(null Runnable) throws NPE
558		*/
559		public void testCallableNPE1() {
560		try {
561	<	Callable c = Executors.callable((Runnable) null);
561	>	Callable unused = Executors.callable((Runnable) null);
562		shouldThrow();
563		} catch (NullPointerException success) {}
564		}
#	Line 559 | Line 568 | public class ExecutorsTest extends JSR16
568		*/
569		public void testCallableNPE2() {
570		try {
571	<	Callable c = Executors.callable((Runnable) null, one);
571	>	Callable unused = Executors.callable((Runnable) null, one);
572		shouldThrow();
573		} catch (NullPointerException success) {}
574		}
#	Line 569 | Line 578 | public class ExecutorsTest extends JSR16
578		*/
579		public void testCallableNPE3() {
580		try {
581	<	Callable c = Executors.callable((PrivilegedAction) null);
581	>	Callable unused = Executors.callable((PrivilegedAction) null);
582		shouldThrow();
583		} catch (NullPointerException success) {}
584		}
#	Line 579 | Line 588 | public class ExecutorsTest extends JSR16
588		*/
589		public void testCallableNPE4() {
590		try {
591	<	Callable c = Executors.callable((PrivilegedExceptionAction) null);
591	>	Callable unused = Executors.callable((PrivilegedExceptionAction) null);
592		shouldThrow();
593		} catch (NullPointerException success) {}
594		}
595
596	+	/**
597	+	* callable(runnable, x).toString() contains toString of wrapped task
598	+	*/
599	+	public void testCallable_withResult_toString() {
600	+	if (testImplementationDetails) {
601	+	Runnable r = () -> {};
602	+	Callable<String> c = Executors.callable(r, "");
603	+	assertEquals(
604	+	identityString(c) + "[Wrapped task = " + r.toString() + "]",
605	+	c.toString());
606	+	}
607	+	}
608	+
609	+	/**
610	+	* callable(runnable).toString() contains toString of wrapped task
611	+	*/
612	+	public void testCallable_toString() {
613	+	if (testImplementationDetails) {
614	+	Runnable r = () -> {};
615	+	Callable<Object> c = Executors.callable(r);
616	+	assertEquals(
617	+	identityString(c) + "[Wrapped task = " + r.toString() + "]",
618	+	c.toString());
619	+	}
620	+	}
621	+
622	+	/**
623	+	* privilegedCallable(callable).toString() contains toString of wrapped task
624	+	*/
625	+	public void testPrivilegedCallable_toString() {
626	+	if (testImplementationDetails) {
627	+	Callable<String> c = () -> "";
628	+	Callable<String> priv = Executors.privilegedCallable(c);
629	+	assertEquals(
630	+	identityString(priv) + "[Wrapped task = " + c.toString() + "]",
631	+	priv.toString());
632	+	}
633	+	}
634
635	+	/**
636	+	* privilegedCallableUsingCurrentClassLoader(callable).toString()
637	+	* contains toString of wrapped task
638	+	*/
639	+	public void testPrivilegedCallableUsingCurrentClassLoader_toString() {
640	+	if (testImplementationDetails) {
641	+	Callable<String> c = () -> "";
642	+	Callable<String> priv = Executors.privilegedCallableUsingCurrentClassLoader(c);
643	+	assertEquals(
644	+	identityString(priv) + "[Wrapped task = " + c.toString() + "]",
645	+	priv.toString());
646	+	}
647	+	}
648		}

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