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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 1.54 by jsr166, Sat Feb 1 18:52:17 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 CountDownLatch done = new CountDownLatch(1);
283	>
284	>	final Runnable sleeper = new CheckedRunnable() {
285		public void realRun() throws InterruptedException {
286	<	Thread.sleep(LONG_DELAY_MS);
286	>	done.await(LONG_DELAY_MS, MILLISECONDS);
287		}};
288	<	for (ExecutorService executor :
289	<	new ExecutorService[] {
290	<	Executors.newSingleThreadExecutor(),
291	<	Executors.newCachedThreadPool(),
292	<	Executors.newFixedThreadPool(2),
293	<	Executors.newScheduledThreadPool(2),
294	<	}) {
295	<	try {
267	<	Future future = executor.submit(sleeper);
268	<	try {
269	<	future.get(SHORT_DELAY_MS, MILLISECONDS);
270	<	shouldThrow();
271	<	} catch (TimeoutException success) {
272	<	} finally {
273	<	future.cancel(true);
274	<	}
275	<	}
276	<	finally {
277	<	joinPool(executor);
278	<	}
288	>
289	>	List<Thread> threads = new ArrayList<>();
290	>	for (final ExecutorService executor : executors) {
291	>	threads.add(newStartedThread(new CheckedRunnable() {
292	>	public void realRun() {
293	>	Future future = executor.submit(sleeper);
294	>	assertFutureTimesOut(future);
295	>	}}));
296		}
297	+	for (Thread thread : threads)
298	+	awaitTermination(thread);
299	+	done.countDown();
300	+	for (ExecutorService executor : executors)
301	+	joinPool(executor);
302		}
303
282	–
304		/**
305		* ThreadPoolExecutor using defaultThreadFactory has
306		* specified group, priority, daemon status, and name
307		*/
308		public void testDefaultThreadFactory() throws Exception {
309		final ThreadGroup egroup = Thread.currentThread().getThreadGroup();
310	+	final CountDownLatch done = new CountDownLatch(1);
311		Runnable r = new CheckedRunnable() {
312		public void realRun() {
313		try {
314		Thread current = Thread.currentThread();
315	<	assertTrue(!current.isDaemon());
315	>	assertFalse(current.isDaemon());
316		assertTrue(current.getPriority() <= Thread.NORM_PRIORITY);
295	–	ThreadGroup g = current.getThreadGroup();
317		SecurityManager s = System.getSecurityManager();
318	<	if (s != null)
319	<	assertTrue(g == s.getThreadGroup());
320	<	else
300	<	assertTrue(g == egroup);
301	<	String name = current.getName();
302	<	assertTrue(name.endsWith("thread-1"));
318	>	assertSame(current.getThreadGroup(),
319	>	(s == null) ? egroup : s.getThreadGroup());
320	>	assertTrue(current.getName().endsWith("thread-1"));
321		} catch (SecurityException ok) {
322		// Also pass if not allowed to change setting
323		}
324	+	done.countDown();
325		}};
326		ExecutorService e = Executors.newSingleThreadExecutor(Executors.defaultThreadFactory());
327	<
328	<	e.execute(r);
329	<	try {
311	<	e.shutdown();
312	<	} catch (SecurityException ok) {
313	<	}
314	<
315	<	try {
316	<	Thread.sleep(SHORT_DELAY_MS);
317	<	} finally {
318	<	joinPool(e);
327	>	try (PoolCleaner cleaner = cleaner(e)) {
328	>	e.execute(r);
329	>	await(done);
330		}
331		}
332
#	Line 325 | Line 336 | public class ExecutorsTest extends JSR16
336		* access control context and context class loader
337		*/
338		public void testPrivilegedThreadFactory() throws Exception {
339	+	final CountDownLatch done = new CountDownLatch(1);
340		Runnable r = new CheckedRunnable() {
341		public void realRun() throws Exception {
342		final ThreadGroup egroup = Thread.currentThread().getThreadGroup();
#	Line 333 | Line 345 | public class ExecutorsTest extends JSR16
345		Runnable r = new CheckedRunnable() {
346		public void realRun() {
347		Thread current = Thread.currentThread();
348	<	assertTrue(!current.isDaemon());
348	>	assertFalse(current.isDaemon());
349		assertTrue(current.getPriority() <= Thread.NORM_PRIORITY);
338	–	ThreadGroup g = current.getThreadGroup();
350		SecurityManager s = System.getSecurityManager();
351	<	if (s != null)
352	<	assertTrue(g == s.getThreadGroup());
353	<	else
343	<	assertTrue(g == egroup);
344	<	String name = current.getName();
345	<	assertTrue(name.endsWith("thread-1"));
351	>	assertSame(current.getThreadGroup(),
352	>	(s == null) ? egroup : s.getThreadGroup());
353	>	assertTrue(current.getName().endsWith("thread-1"));
354		assertSame(thisccl, current.getContextClassLoader());
355		assertEquals(thisacc, AccessController.getContext());
356	+	done.countDown();
357		}};
358		ExecutorService e = Executors.newSingleThreadExecutor(Executors.privilegedThreadFactory());
359	<	e.execute(r);
360	<	e.shutdown();
361	<	Thread.sleep(SHORT_DELAY_MS);
362	<	joinPool(e);
359	>	try (PoolCleaner cleaner = cleaner(e)) {
360	>	e.execute(r);
361	>	await(done);
362	>	}
363		}};
364
365		runWithPermissions(r,
#	Line 387 | Line 396 | public class ExecutorsTest extends JSR16
396		}
397		}
398
390	–
399		/**
400		* Without class loader permissions, creating
401		* privilegedCallableUsingCurrentClassLoader throws ACE
#	Line 410 | Line 418 | public class ExecutorsTest extends JSR16
418		* With class loader permissions, calling
419		* privilegedCallableUsingCurrentClassLoader does not throw ACE
420		*/
421	<	public void testprivilegedCallableUsingCCLWithPrivs() throws Exception {
421	>	public void testPrivilegedCallableUsingCCLWithPrivs() throws Exception {
422		Runnable r = new CheckedRunnable() {
423		public void realRun() throws Exception {
424		Executors.privilegedCallableUsingCurrentClassLoader
#	Line 426 | Line 434 | public class ExecutorsTest extends JSR16
434		/**
435		* Without permissions, calling privilegedCallable throws ACE
436		*/
437	<	public void testprivilegedCallableWithNoPrivs() throws Exception {
437	>	public void testPrivilegedCallableWithNoPrivs() throws Exception {
438		// Avoid classloader-related SecurityExceptions in swingui.TestRunner
439		Executors.privilegedCallable(new CheckCCL());
440
#	Line 498 | Line 506 | public class ExecutorsTest extends JSR16
506		/**
507		* With permissions, calling privilegedCallable succeeds
508		*/
509	<	public void testprivilegedCallableWithPrivs() throws Exception {
509	>	public void testPrivilegedCallableWithPrivs() throws Exception {
510		Runnable r = new CheckedRunnable() {
511		public void realRun() throws Exception {
512		Executors.privilegedCallable(new CheckCCL()).call();
513		}};
514
515	<	runWithPermissions(r,
515	>	runWithPermissions(r,
516		new RuntimePermission("getClassLoader"),
517		new RuntimePermission("setContextClassLoader"));
518		}
#	Line 543 | Line 551 | public class ExecutorsTest extends JSR16
551		assertSame(one, c.call());
552		}
553
546	–
554		/**
555		* callable(null Runnable) throws NPE
556		*/
557		public void testCallableNPE1() {
558		try {
559	<	Callable c = Executors.callable((Runnable) null);
559	>	Callable unused = Executors.callable((Runnable) null);
560		shouldThrow();
561		} catch (NullPointerException success) {}
562		}
#	Line 559 | Line 566 | public class ExecutorsTest extends JSR16
566		*/
567		public void testCallableNPE2() {
568		try {
569	<	Callable c = Executors.callable((Runnable) null, one);
569	>	Callable unused = Executors.callable((Runnable) null, one);
570		shouldThrow();
571		} catch (NullPointerException success) {}
572		}
#	Line 569 | Line 576 | public class ExecutorsTest extends JSR16
576		*/
577		public void testCallableNPE3() {
578		try {
579	<	Callable c = Executors.callable((PrivilegedAction) null);
579	>	Callable unused = Executors.callable((PrivilegedAction) null);
580		shouldThrow();
581		} catch (NullPointerException success) {}
582		}
#	Line 579 | Line 586 | public class ExecutorsTest extends JSR16
586		*/
587		public void testCallableNPE4() {
588		try {
589	<	Callable c = Executors.callable((PrivilegedExceptionAction) null);
589	>	Callable unused = Executors.callable((PrivilegedExceptionAction) null);
590		shouldThrow();
591		} catch (NullPointerException success) {}
592		}
593
594	+	/**
595	+	* callable(runnable, x).toString() contains toString of wrapped task
596	+	*/
597	+	public void testCallable_withResult_toString() {
598	+	if (testImplementationDetails) {
599	+	Runnable r = () -> {};
600	+	Callable<String> c = Executors.callable(r, "");
601	+	assertEquals(
602	+	identityString(c) + "[Wrapped task = " + r.toString() + "]",
603	+	c.toString());
604	+	}
605	+	}
606
607	+	/**
608	+	* callable(runnable).toString() contains toString of wrapped task
609	+	*/
610	+	public void testCallable_toString() {
611	+	if (testImplementationDetails) {
612	+	Runnable r = () -> {};
613	+	Callable<Object> c = Executors.callable(r);
614	+	assertEquals(
615	+	identityString(c) + "[Wrapped task = " + r.toString() + "]",
616	+	c.toString());
617	+	}
618	+	}
619	+
620	+	/**
621	+	* privilegedCallable(callable).toString() contains toString of wrapped task
622	+	*/
623	+	public void testPrivilegedCallable_toString() {
624	+	if (testImplementationDetails) {
625	+	Callable<String> c = () -> "";
626	+	Callable<String> priv = Executors.privilegedCallable(c);
627	+	assertEquals(
628	+	identityString(priv) + "[Wrapped task = " + c.toString() + "]",
629	+	priv.toString());
630	+	}
631	+	}
632	+
633	+	/**
634	+	* privilegedCallableUsingCurrentClassLoader(callable).toString()
635	+	* contains toString of wrapped task
636	+	*/
637	+	public void testPrivilegedCallableUsingCurrentClassLoader_toString() {
638	+	if (testImplementationDetails) {
639	+	Callable<String> c = () -> "";
640	+	Callable<String> priv = Executors.privilegedCallableUsingCurrentClassLoader(c);
641	+	assertEquals(
642	+	identityString(priv) + "[Wrapped task = " + c.toString() + "]",
643	+	priv.toString());
644	+	}
645	+	}
646		}

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