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

Comparing jsr166/src/test/tck/ExecutorsTest.java (file contents):
Revision 1.10 by tim, Wed Dec 10 01:51:12 2003 UTC vs.
Revision 1.40 by jsr166, Fri May 27 19:28:38 2011 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
8	–
9		import junit.framework.*;
10		import java.util.*;
11		import java.util.concurrent.*;
12	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13		import java.math.BigInteger;
14		import java.security.*;
15
16	<	public class ExecutorsTest extends JSR166TestCase{
16	>	public class ExecutorsTest extends JSR166TestCase {
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run(suite());
19		}
20		public static Test suite() {
21		return new TestSuite(ExecutorsTest.class);
22		}
23
23	–	static class TimedCallable<T> implements Callable<T> {
24	–	private final ExecutorService exec;
25	–	private final Callable<T> func;
26	–	private final long msecs;
27	–
28	–	TimedCallable(ExecutorService exec, Callable<T> func, long msecs) {
29	–	this.exec = exec;
30	–	this.func = func;
31	–	this.msecs = msecs;
32	–	}
33	–
34	–	public T call() throws Exception {
35	–	Future<T> ftask = exec.submit(func);
36	–	try {
37	–	return ftask.get(msecs, TimeUnit.MILLISECONDS);
38	–	} finally {
39	–	ftask.cancel(true);
40	–	}
41	–	}
42	–	}
43	–
44	–
45	–	private static class Fib implements Callable<BigInteger> {
46	–	private final BigInteger n;
47	–	Fib(long n) {
48	–	if (n < 0) throw new IllegalArgumentException("need non-negative arg, but got " + n);
49	–	this.n = BigInteger.valueOf(n);
50	–	}
51	–	public BigInteger call() {
52	–	BigInteger f1 = BigInteger.ONE;
53	–	BigInteger f2 = f1;
54	–	for (BigInteger i = BigInteger.ZERO; i.compareTo(n) < 0; i = i.add(BigInteger.ONE)) {
55	–	BigInteger t = f1.add(f2);
56	–	f1 = f2;
57	–	f2 = t;
58	–	}
59	–	return f1;
60	–	}
61	–	};
62	–
24		/**
25		* A newCachedThreadPool can execute runnables
26		*/
#	Line 68 | Line 29 | public class ExecutorsTest extends JSR16
29		e.execute(new NoOpRunnable());
30		e.execute(new NoOpRunnable());
31		e.execute(new NoOpRunnable());
32	<	e.shutdown();
32	>	joinPool(e);
33		}
34
35		/**
#	Line 79 | Line 40 | public class ExecutorsTest extends JSR16
40		e.execute(new NoOpRunnable());
41		e.execute(new NoOpRunnable());
42		e.execute(new NoOpRunnable());
43	<	e.shutdown();
43	>	joinPool(e);
44		}
45
46		/**
#	Line 89 | Line 50 | public class ExecutorsTest extends JSR16
50		try {
51		ExecutorService e = Executors.newCachedThreadPool(null);
52		shouldThrow();
53	<	}
93	<	catch(NullPointerException success) {
94	<	}
53	>	} catch (NullPointerException success) {}
54		}
55
97	–
56		/**
57		* A new SingleThreadExecutor can execute runnables
58		*/
#	Line 103 | Line 61 | public class ExecutorsTest extends JSR16
61		e.execute(new NoOpRunnable());
62		e.execute(new NoOpRunnable());
63		e.execute(new NoOpRunnable());
64	<	e.shutdown();
64	>	joinPool(e);
65		}
66
67		/**
#	Line 114 | Line 72 | public class ExecutorsTest extends JSR16
72		e.execute(new NoOpRunnable());
73		e.execute(new NoOpRunnable());
74		e.execute(new NoOpRunnable());
75	<	e.shutdown();
75	>	joinPool(e);
76		}
77
78		/**
#	Line 124 | Line 82 | public class ExecutorsTest extends JSR16
82		try {
83		ExecutorService e = Executors.newSingleThreadExecutor(null);
84		shouldThrow();
85	<	}
86	<	catch(NullPointerException success) {
85	>	} catch (NullPointerException success) {}
86	>	}
87	>
88	>	/**
89	>	* A new SingleThreadExecutor cannot be casted to concrete implementation
90	>	*/
91	>	public void testCastNewSingleThreadExecutor() {
92	>	ExecutorService e = Executors.newSingleThreadExecutor();
93	>	try {
94	>	ThreadPoolExecutor tpe = (ThreadPoolExecutor)e;
95	>	shouldThrow();
96	>	} catch (ClassCastException success) {
97	>	} finally {
98	>	joinPool(e);
99		}
100		}
101
#	Line 137 | Line 107 | public class ExecutorsTest extends JSR16
107		e.execute(new NoOpRunnable());
108		e.execute(new NoOpRunnable());
109		e.execute(new NoOpRunnable());
110	<	e.shutdown();
110	>	joinPool(e);
111		}
112
113		/**
#	Line 148 | Line 118 | public class ExecutorsTest extends JSR16
118		e.execute(new NoOpRunnable());
119		e.execute(new NoOpRunnable());
120		e.execute(new NoOpRunnable());
121	<	e.shutdown();
121	>	joinPool(e);
122		}
123
124		/**
#	Line 158 | Line 128 | public class ExecutorsTest extends JSR16
128		try {
129		ExecutorService e = Executors.newFixedThreadPool(2, null);
130		shouldThrow();
131	<	}
162	<	catch(NullPointerException success) {
163	<	}
131	>	} catch (NullPointerException success) {}
132		}
133
134		/**
#	Line 170 | Line 138 | public class ExecutorsTest extends JSR16
138		try {
139		ExecutorService e = Executors.newFixedThreadPool(0);
140		shouldThrow();
141	<	}
142	<	catch(IllegalArgumentException success) {
141	>	} catch (IllegalArgumentException success) {}
142	>	}
143	>
144	>	/**
145	>	* An unconfigurable newFixedThreadPool can execute runnables
146	>	*/
147	>	public void testunconfigurableExecutorService() {
148	>	ExecutorService e = Executors.unconfigurableExecutorService(Executors.newFixedThreadPool(2));
149	>	e.execute(new NoOpRunnable());
150	>	e.execute(new NoOpRunnable());
151	>	e.execute(new NoOpRunnable());
152	>	joinPool(e);
153	>	}
154	>
155	>	/**
156	>	* unconfigurableExecutorService(null) throws NPE
157	>	*/
158	>	public void testunconfigurableExecutorServiceNPE() {
159	>	try {
160	>	ExecutorService e = Executors.unconfigurableExecutorService(null);
161	>	shouldThrow();
162	>	} catch (NullPointerException success) {}
163	>	}
164	>
165	>	/**
166	>	* unconfigurableScheduledExecutorService(null) throws NPE
167	>	*/
168	>	public void testunconfigurableScheduledExecutorServiceNPE() {
169	>	try {
170	>	ExecutorService e = Executors.unconfigurableScheduledExecutorService(null);
171	>	shouldThrow();
172	>	} catch (NullPointerException success) {}
173	>	}
174	>
175	>	/**
176	>	* a newSingleThreadScheduledExecutor successfully runs delayed task
177	>	*/
178	>	public void testNewSingleThreadScheduledExecutor() throws Exception {
179	>	ScheduledExecutorService p = Executors.newSingleThreadScheduledExecutor();
180	>	try {
181	>	final CountDownLatch done = new CountDownLatch(1);
182	>	final Runnable task = new CheckedRunnable() {
183	>	public void realRun() {
184	>	done.countDown();
185	>	}};
186	>	Future f = p.schedule(Executors.callable(task, Boolean.TRUE),
187	>	SHORT_DELAY_MS, MILLISECONDS);
188	>	assertFalse(f.isDone());
189	>	assertTrue(done.await(MEDIUM_DELAY_MS, MILLISECONDS));
190	>	assertSame(Boolean.TRUE, f.get(SMALL_DELAY_MS, MILLISECONDS));
191	>	assertSame(Boolean.TRUE, f.get());
192	>	assertTrue(f.isDone());
193	>	} finally {
194	>	joinPool(p);
195		}
196		}
197
198	+	/**
199	+	* a newScheduledThreadPool successfully runs delayed task
200	+	*/
201	+	public void testnewScheduledThreadPool() throws Exception {
202	+	ScheduledExecutorService p = Executors.newScheduledThreadPool(2);
203	+	try {
204	+	final CountDownLatch done = new CountDownLatch(1);
205	+	final Runnable task = new CheckedRunnable() {
206	+	public void realRun() {
207	+	done.countDown();
208	+	}};
209	+	Future f = p.schedule(Executors.callable(task, Boolean.TRUE),
210	+	SHORT_DELAY_MS, MILLISECONDS);
211	+	assertFalse(f.isDone());
212	+	assertTrue(done.await(MEDIUM_DELAY_MS, MILLISECONDS));
213	+	assertSame(Boolean.TRUE, f.get(SMALL_DELAY_MS, MILLISECONDS));
214	+	assertSame(Boolean.TRUE, f.get());
215	+	assertTrue(f.isDone());
216	+	} finally {
217	+	joinPool(p);
218	+	}
219	+	}
220
221		/**
222	<	*  timeouts from execute will time out if they compute too long.
222	>	* an unconfigurable newScheduledThreadPool successfully runs delayed task
223		*/
224	<	public void testTimedCallable() {
225	<	int N = 10000;
226	<	ExecutorService executor = Executors.newSingleThreadExecutor();
227	<	List<Callable<BigInteger>> tasks = new ArrayList<Callable<BigInteger>>(N);
228	<	try {
229	<	long startTime = System.currentTimeMillis();
230	<
231	<	long i = 0;
232	<	while (tasks.size() < N) {
233	<	tasks.add(new TimedCallable<BigInteger>(executor, new Fib(i), 1));
234	<	i += 10;
235	<	}
236	<
237	<	int iters = 0;
238	<	BigInteger sum = BigInteger.ZERO;
239	<	for (Iterator<Callable<BigInteger>> it = tasks.iterator(); it.hasNext();) {
240	<	try {
241	<	++iters;
242	<	sum = sum.add(it.next().call());
201	<	}
202	<	catch (TimeoutException success) {
203	<	assertTrue(iters > 0);
204	<	return;
205	<	}
206	<	catch (Exception e) {
207	<	unexpectedException();
208	<	}
209	<	}
210	<	// if by chance we didn't ever time out, total time must be small
211	<	long elapsed = System.currentTimeMillis() - startTime;
212	<	assertTrue(elapsed < N);
224	>	public void testunconfigurableScheduledExecutorService() throws Exception {
225	>	ScheduledExecutorService p =
226	>	Executors.unconfigurableScheduledExecutorService
227	>	(Executors.newScheduledThreadPool(2));
228	>	try {
229	>	final CountDownLatch done = new CountDownLatch(1);
230	>	final Runnable task = new CheckedRunnable() {
231	>	public void realRun() {
232	>	done.countDown();
233	>	}};
234	>	Future f = p.schedule(Executors.callable(task, Boolean.TRUE),
235	>	SHORT_DELAY_MS, MILLISECONDS);
236	>	assertFalse(f.isDone());
237	>	assertTrue(done.await(MEDIUM_DELAY_MS, MILLISECONDS));
238	>	assertSame(Boolean.TRUE, f.get(SMALL_DELAY_MS, MILLISECONDS));
239	>	assertSame(Boolean.TRUE, f.get());
240	>	assertTrue(f.isDone());
241	>	} finally {
242	>	joinPool(p);
243		}
244	<	finally {
244	>	}
245	>
246	>	/**
247	>	* Future.get on submitted tasks will time out if they compute too long.
248	>	*/
249	>	public void testTimedCallable() throws Exception {
250	>	final ExecutorService[] executors = {
251	>	Executors.newSingleThreadExecutor(),
252	>	Executors.newCachedThreadPool(),
253	>	Executors.newFixedThreadPool(2),
254	>	Executors.newScheduledThreadPool(2),
255	>	};
256	>
257	>	final Runnable sleeper = new CheckedInterruptedRunnable() {
258	>	public void realRun() throws InterruptedException {
259	>	delay(LONG_DELAY_MS);
260	>	}};
261	>
262	>	List<Thread> threads = new ArrayList<Thread>();
263	>	for (final ExecutorService executor : executors) {
264	>	threads.add(newStartedThread(new CheckedRunnable() {
265	>	public void realRun() {
266	>	long startTime = System.nanoTime();
267	>	Future future = executor.submit(sleeper);
268	>	assertFutureTimesOut(future);
269	>	}}));
270	>	}
271	>	for (Thread thread : threads)
272	>	awaitTermination(thread);
273	>	for (ExecutorService executor : executors)
274		joinPool(executor);
216	–	}
275		}
276
219	–
277		/**
278		* ThreadPoolExecutor using defaultThreadFactory has
279		* specified group, priority, daemon status, and name
280		*/
281	<	public void testDefaultThreadFactory() {
281	>	public void testDefaultThreadFactory() throws Exception {
282		final ThreadGroup egroup = Thread.currentThread().getThreadGroup();
283	<	Runnable r = new Runnable() {
284	<	public void run() {
283	>	Runnable r = new CheckedRunnable() {
284	>	public void realRun() {
285	>	try {
286		Thread current = Thread.currentThread();
287	<	threadAssertTrue(!current.isDaemon());
288	<	threadAssertTrue(current.getPriority() == Thread.NORM_PRIORITY);
287	>	assertTrue(!current.isDaemon());
288	>	assertTrue(current.getPriority() <= Thread.NORM_PRIORITY);
289		ThreadGroup g = current.getThreadGroup();
290		SecurityManager s = System.getSecurityManager();
291		if (s != null)
292	<	threadAssertTrue(g == s.getThreadGroup());
292	>	assertTrue(g == s.getThreadGroup());
293		else
294	<	threadAssertTrue(g == egroup);
294	>	assertTrue(g == egroup);
295		String name = current.getName();
296	<	threadAssertTrue(name.endsWith("thread-1"));
296	>	assertTrue(name.endsWith("thread-1"));
297	>	} catch (SecurityException ok) {
298	>	// Also pass if not allowed to change setting
299		}
300	<	};
300	>	}};
301		ExecutorService e = Executors.newSingleThreadExecutor(Executors.defaultThreadFactory());
302	<
302	>
303		e.execute(r);
244	–	e.shutdown();
304		try {
305	<	Thread.sleep(SHORT_DELAY_MS);
306	<	} catch (Exception eX) {
307	<	unexpectedException();
305	>	e.shutdown();
306	>	} catch (SecurityException ok) {
307	>	}
308	>
309	>	try {
310	>	delay(SHORT_DELAY_MS);
311		} finally {
312		joinPool(e);
313		}
#	Line 256 | Line 318 | public class ExecutorsTest extends JSR16
318		* specified group, priority, daemon status, name,
319		* access control context and context class loader
320		*/
321	<	public void testPrivilegedThreadFactory() {
322	<	Policy savedPolicy = Policy.getPolicy();
323	<	AdjustablePolicy policy = new AdjustablePolicy();
324	<	policy.addPermission(new RuntimePermission("getContextClassLoader"));
325	<	policy.addPermission(new RuntimePermission("setContextClassLoader"));
326	<	Policy.setPolicy(policy);
327	<	final ThreadGroup egroup = Thread.currentThread().getThreadGroup();
328	<	final ClassLoader thisccl = Thread.currentThread().getContextClassLoader();
329	<	final AccessControlContext thisacc = AccessController.getContext();
330	<	Runnable r = new Runnable() {
331	<	public void run() {
332	<	Thread current = Thread.currentThread();
333	<	threadAssertTrue(!current.isDaemon());
334	<	threadAssertTrue(current.getPriority() == Thread.NORM_PRIORITY);
335	<	ThreadGroup g = current.getThreadGroup();
336	<	SecurityManager s = System.getSecurityManager();
337	<	if (s != null)
338	<	threadAssertTrue(g == s.getThreadGroup());
339	<	else
340	<	threadAssertTrue(g == egroup);
341	<	String name = current.getName();
342	<	threadAssertTrue(name.endsWith("thread-1"));
343	<	threadAssertTrue(thisccl == current.getContextClassLoader());
344	<	threadAssertTrue(thisacc.equals(AccessController.getContext()));
345	<	}
346	<	};
347	<	ExecutorService e = Executors.newSingleThreadExecutor(Executors.privilegedThreadFactory());
348	<
349	<	Policy.setPolicy(savedPolicy);
350	<	e.execute(r);
351	<	e.shutdown();
352	<	try {
353	<	Thread.sleep(SHORT_DELAY_MS);
354	<	} catch (Exception ex) {
355	<	unexpectedException();
356	<	} finally {
357	<	joinPool(e);
321	>	public void testPrivilegedThreadFactory() throws Exception {
322	>	Runnable r = new CheckedRunnable() {
323	>	public void realRun() throws Exception {
324	>	final ThreadGroup egroup = Thread.currentThread().getThreadGroup();
325	>	final ClassLoader thisccl = Thread.currentThread().getContextClassLoader();
326	>	final AccessControlContext thisacc = AccessController.getContext();
327	>	Runnable r = new CheckedRunnable() {
328	>	public void realRun() {
329	>	Thread current = Thread.currentThread();
330	>	assertTrue(!current.isDaemon());
331	>	assertTrue(current.getPriority() <= Thread.NORM_PRIORITY);
332	>	ThreadGroup g = current.getThreadGroup();
333	>	SecurityManager s = System.getSecurityManager();
334	>	if (s != null)
335	>	assertTrue(g == s.getThreadGroup());
336	>	else
337	>	assertTrue(g == egroup);
338	>	String name = current.getName();
339	>	assertTrue(name.endsWith("thread-1"));
340	>	assertSame(thisccl, current.getContextClassLoader());
341	>	assertEquals(thisacc, AccessController.getContext());
342	>	}};
343	>	ExecutorService e = Executors.newSingleThreadExecutor(Executors.privilegedThreadFactory());
344	>	e.execute(r);
345	>	e.shutdown();
346	>	delay(SHORT_DELAY_MS);
347	>	joinPool(e);
348	>	}};
349	>
350	>	runWithPermissions(r,
351	>	new RuntimePermission("getClassLoader"),
352	>	new RuntimePermission("setContextClassLoader"),
353	>	new RuntimePermission("modifyThread"));
354	>	}
355	>
356	>	boolean haveCCLPermissions() {
357	>	SecurityManager sm = System.getSecurityManager();
358	>	if (sm != null) {
359	>	try {
360	>	sm.checkPermission(new RuntimePermission("setContextClassLoader"));
361	>	sm.checkPermission(new RuntimePermission("getClassLoader"));
362	>	} catch (AccessControlException e) {
363	>	return false;
364	>	}
365	>	}
366	>	return true;
367	>	}
368	>
369	>	void checkCCL() {
370	>	SecurityManager sm = System.getSecurityManager();
371	>	if (sm != null) {
372	>	sm.checkPermission(new RuntimePermission("setContextClassLoader"));
373	>	sm.checkPermission(new RuntimePermission("getClassLoader"));
374		}
375	+	}
376	+
377	+	class CheckCCL implements Callable<Object> {
378	+	public Object call() {
379	+	checkCCL();
380	+	return null;
381	+	}
382	+	}
383	+
384	+	/**
385	+	* Without class loader permissions, creating
386	+	* privilegedCallableUsingCurrentClassLoader throws ACE
387	+	*/
388	+	public void testCreatePrivilegedCallableUsingCCLWithNoPrivs() {
389	+	Runnable r = new CheckedRunnable() {
390	+	public void realRun() throws Exception {
391	+	if (System.getSecurityManager() == null)
392	+	return;
393	+	try {
394	+	Executors.privilegedCallableUsingCurrentClassLoader(new NoOpCallable());
395	+	shouldThrow();
396	+	} catch (AccessControlException success) {}
397	+	}};
398	+
399	+	runWithoutPermissions(r);
400	+	}
401	+
402	+	/**
403	+	* With class loader permissions, calling
404	+	* privilegedCallableUsingCurrentClassLoader does not throw ACE
405	+	*/
406	+	public void testprivilegedCallableUsingCCLWithPrivs() throws Exception {
407	+	Runnable r = new CheckedRunnable() {
408	+	public void realRun() throws Exception {
409	+	Executors.privilegedCallableUsingCurrentClassLoader
410	+	(new NoOpCallable())
411	+	.call();
412	+	}};
413	+
414	+	runWithPermissions(r,
415	+	new RuntimePermission("getClassLoader"),
416	+	new RuntimePermission("setContextClassLoader"));
417	+	}
418
419	+	/**
420	+	* Without permissions, calling privilegedCallable throws ACE
421	+	*/
422	+	public void testprivilegedCallableWithNoPrivs() throws Exception {
423	+	// Avoid classloader-related SecurityExceptions in swingui.TestRunner
424	+	Executors.privilegedCallable(new CheckCCL());
425	+
426	+	Runnable r = new CheckedRunnable() {
427	+	public void realRun() throws Exception {
428	+	if (System.getSecurityManager() == null)
429	+	return;
430	+	Callable task = Executors.privilegedCallable(new CheckCCL());
431	+	try {
432	+	task.call();
433	+	shouldThrow();
434	+	} catch (AccessControlException success) {}
435	+	}};
436	+
437	+	runWithoutPermissions(r);
438	+
439	+	// It seems rather difficult to test that the
440	+	// AccessControlContext of the privilegedCallable is used
441	+	// instead of its caller.  Below is a failed attempt to do
442	+	// that, which does not work because the AccessController
443	+	// cannot capture the internal state of the current Policy.
444	+	// It would be much more work to differentiate based on,
445	+	// e.g. CodeSource.
446	+
447	+	//         final AccessControlContext[] noprivAcc = new AccessControlContext[1];
448	+	//         final Callable[] task = new Callable[1];
449	+
450	+	//         runWithPermissions
451	+	//             (new CheckedRunnable() {
452	+	//                 public void realRun() {
453	+	//                     if (System.getSecurityManager() == null)
454	+	//                         return;
455	+	//                     noprivAcc[0] = AccessController.getContext();
456	+	//                     task[0] = Executors.privilegedCallable(new CheckCCL());
457	+	//                     try {
458	+	//                         AccessController.doPrivileged(new PrivilegedAction<Void>() {
459	+	//                                                           public Void run() {
460	+	//                                                               checkCCL();
461	+	//                                                               return null;
462	+	//                                                           }}, noprivAcc[0]);
463	+	//                         shouldThrow();
464	+	//                     } catch (AccessControlException success) {}
465	+	//                 }});
466	+
467	+	//         runWithPermissions
468	+	//             (new CheckedRunnable() {
469	+	//                 public void realRun() throws Exception {
470	+	//                     if (System.getSecurityManager() == null)
471	+	//                         return;
472	+	//                     // Verify that we have an underprivileged ACC
473	+	//                     try {
474	+	//                         AccessController.doPrivileged(new PrivilegedAction<Void>() {
475	+	//                                                           public Void run() {
476	+	//                                                               checkCCL();
477	+	//                                                               return null;
478	+	//                                                           }}, noprivAcc[0]);
479	+	//                         shouldThrow();
480	+	//                     } catch (AccessControlException success) {}
481	+
482	+	//                     try {
483	+	//                         task[0].call();
484	+	//                         shouldThrow();
485	+	//                     } catch (AccessControlException success) {}
486	+	//                 }},
487	+	//              new RuntimePermission("getClassLoader"),
488	+	//              new RuntimePermission("setContextClassLoader"));
489	+	}
490	+
491	+	/**
492	+	* With permissions, calling privilegedCallable succeeds
493	+	*/
494	+	public void testprivilegedCallableWithPrivs() throws Exception {
495	+	Runnable r = new CheckedRunnable() {
496	+	public void realRun() throws Exception {
497	+	Executors.privilegedCallable(new CheckCCL()).call();
498	+	}};
499	+
500	+	runWithPermissions(r,
501	+	new RuntimePermission("getClassLoader"),
502	+	new RuntimePermission("setContextClassLoader"));
503	+	}
504	+
505	+	/**
506	+	* callable(Runnable) returns null when called
507	+	*/
508	+	public void testCallable1() throws Exception {
509	+	Callable c = Executors.callable(new NoOpRunnable());
510	+	assertNull(c.call());
511	+	}
512	+
513	+	/**
514	+	* callable(Runnable, result) returns result when called
515	+	*/
516	+	public void testCallable2() throws Exception {
517	+	Callable c = Executors.callable(new NoOpRunnable(), one);
518	+	assertSame(one, c.call());
519	+	}
520	+
521	+	/**
522	+	* callable(PrivilegedAction) returns its result when called
523	+	*/
524	+	public void testCallable3() throws Exception {
525	+	Callable c = Executors.callable(new PrivilegedAction() {
526	+	public Object run() { return one; }});
527	+	assertSame(one, c.call());
528	+	}
529	+
530	+	/**
531	+	* callable(PrivilegedExceptionAction) returns its result when called
532	+	*/
533	+	public void testCallable4() throws Exception {
534	+	Callable c = Executors.callable(new PrivilegedExceptionAction() {
535	+	public Object run() { return one; }});
536	+	assertSame(one, c.call());
537	+	}
538	+
539	+	/**
540	+	* callable(null Runnable) throws NPE
541	+	*/
542	+	public void testCallableNPE1() {
543	+	try {
544	+	Callable c = Executors.callable((Runnable) null);
545	+	shouldThrow();
546	+	} catch (NullPointerException success) {}
547	+	}
548	+
549	+	/**
550	+	* callable(null, result) throws NPE
551	+	*/
552	+	public void testCallableNPE2() {
553	+	try {
554	+	Callable c = Executors.callable((Runnable) null, one);
555	+	shouldThrow();
556	+	} catch (NullPointerException success) {}
557	+	}
558	+
559	+	/**
560	+	* callable(null PrivilegedAction) throws NPE
561	+	*/
562	+	public void testCallableNPE3() {
563	+	try {
564	+	Callable c = Executors.callable((PrivilegedAction) null);
565	+	shouldThrow();
566	+	} catch (NullPointerException success) {}
567	+	}
568	+
569	+	/**
570	+	* callable(null PrivilegedExceptionAction) throws NPE
571	+	*/
572	+	public void testCallableNPE4() {
573	+	try {
574	+	Callable c = Executors.callable((PrivilegedExceptionAction) null);
575	+	shouldThrow();
576	+	} catch (NullPointerException success) {}
577		}
578
579		}

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