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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 1.34 by jsr166, Sat Oct 9 19:30:35 2010 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/licenses/publicdomain
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.*;
13	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
14		import java.math.BigInteger;
15		import java.security.*;
16
17	<	public class ExecutorsTest extends JSR166TestCase{
17	>	public class ExecutorsTest extends JSR166TestCase {
18		public static void main(String[] args) {
19	<	junit.textui.TestRunner.run (suite());
19	>	junit.textui.TestRunner.run(suite());
20		}
21		public static Test suite() {
22		return new TestSuite(ExecutorsTest.class);
23		}
24
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	–
25		/**
26		* A newCachedThreadPool can execute runnables
27		*/
#	Line 68 | Line 30 | public class ExecutorsTest extends JSR16
30		e.execute(new NoOpRunnable());
31		e.execute(new NoOpRunnable());
32		e.execute(new NoOpRunnable());
33	<	e.shutdown();
33	>	joinPool(e);
34		}
35
36		/**
#	Line 79 | Line 41 | public class ExecutorsTest extends JSR16
41		e.execute(new NoOpRunnable());
42		e.execute(new NoOpRunnable());
43		e.execute(new NoOpRunnable());
44	<	e.shutdown();
44	>	joinPool(e);
45		}
46
47		/**
#	Line 89 | Line 51 | public class ExecutorsTest extends JSR16
51		try {
52		ExecutorService e = Executors.newCachedThreadPool(null);
53		shouldThrow();
54	<	}
93	<	catch(NullPointerException success) {
94	<	}
54	>	} catch (NullPointerException success) {}
55		}
56
57
#	Line 103 | Line 63 | public class ExecutorsTest extends JSR16
63		e.execute(new NoOpRunnable());
64		e.execute(new NoOpRunnable());
65		e.execute(new NoOpRunnable());
66	<	e.shutdown();
66	>	joinPool(e);
67		}
68
69		/**
#	Line 114 | Line 74 | public class ExecutorsTest extends JSR16
74		e.execute(new NoOpRunnable());
75		e.execute(new NoOpRunnable());
76		e.execute(new NoOpRunnable());
77	<	e.shutdown();
77	>	joinPool(e);
78		}
79
80		/**
#	Line 124 | Line 84 | public class ExecutorsTest extends JSR16
84		try {
85		ExecutorService e = Executors.newSingleThreadExecutor(null);
86		shouldThrow();
87	<	}
88	<	catch(NullPointerException success) {
87	>	} catch (NullPointerException success) {}
88	>	}
89	>
90	>	/**
91	>	* A new SingleThreadExecutor cannot be casted to concrete implementation
92	>	*/
93	>	public void testCastNewSingleThreadExecutor() {
94	>	ExecutorService e = Executors.newSingleThreadExecutor();
95	>	try {
96	>	ThreadPoolExecutor tpe = (ThreadPoolExecutor)e;
97	>	shouldThrow();
98	>	} catch (ClassCastException success) {
99	>	} finally {
100	>	joinPool(e);
101		}
102		}
103
104	+
105		/**
106		* A new newFixedThreadPool can execute runnables
107		*/
#	Line 137 | Line 110 | public class ExecutorsTest extends JSR16
110		e.execute(new NoOpRunnable());
111		e.execute(new NoOpRunnable());
112		e.execute(new NoOpRunnable());
113	<	e.shutdown();
113	>	joinPool(e);
114		}
115
116		/**
#	Line 148 | Line 121 | public class ExecutorsTest extends JSR16
121		e.execute(new NoOpRunnable());
122		e.execute(new NoOpRunnable());
123		e.execute(new NoOpRunnable());
124	<	e.shutdown();
124	>	joinPool(e);
125		}
126
127		/**
#	Line 158 | Line 131 | public class ExecutorsTest extends JSR16
131		try {
132		ExecutorService e = Executors.newFixedThreadPool(2, null);
133		shouldThrow();
134	<	}
162	<	catch(NullPointerException success) {
163	<	}
134	>	} catch (NullPointerException success) {}
135		}
136
137		/**
#	Line 170 | Line 141 | public class ExecutorsTest extends JSR16
141		try {
142		ExecutorService e = Executors.newFixedThreadPool(0);
143		shouldThrow();
144	<	}
174	<	catch(IllegalArgumentException success) {
175	<	}
144	>	} catch (IllegalArgumentException success) {}
145		}
146
147
148		/**
149	<	*  timeouts from execute will time out if they compute too long.
149	>	* An unconfigurable newFixedThreadPool can execute runnables
150		*/
151	<	public void testTimedCallable() {
152	<	int N = 10000;
153	<	ExecutorService executor = Executors.newSingleThreadExecutor();
154	<	List<Callable<BigInteger>> tasks = new ArrayList<Callable<BigInteger>>(N);
155	<	try {
156	<	long startTime = System.currentTimeMillis();
157	<
158	<	long i = 0;
159	<	while (tasks.size() < N) {
160	<	tasks.add(new TimedCallable<BigInteger>(executor, new Fib(i), 1));
161	<	i += 10;
162	<	}
163	<
164	<	int iters = 0;
165	<	BigInteger sum = BigInteger.ZERO;
166	<	for (Iterator<Callable<BigInteger>> it = tasks.iterator(); it.hasNext();) {
151	>	public void testunconfigurableExecutorService() {
152	>	ExecutorService e = Executors.unconfigurableExecutorService(Executors.newFixedThreadPool(2));
153	>	e.execute(new NoOpRunnable());
154	>	e.execute(new NoOpRunnable());
155	>	e.execute(new NoOpRunnable());
156	>	joinPool(e);
157	>	}
158	>
159	>	/**
160	>	* unconfigurableExecutorService(null) throws NPE
161	>	*/
162	>	public void testunconfigurableExecutorServiceNPE() {
163	>	try {
164	>	ExecutorService e = Executors.unconfigurableExecutorService(null);
165	>	shouldThrow();
166	>	} catch (NullPointerException success) {}
167	>	}
168	>
169	>	/**
170	>	* unconfigurableScheduledExecutorService(null) throws NPE
171	>	*/
172	>	public void testunconfigurableScheduledExecutorServiceNPE() {
173	>	try {
174	>	ExecutorService e = Executors.unconfigurableScheduledExecutorService(null);
175	>	shouldThrow();
176	>	} catch (NullPointerException success) {}
177	>	}
178	>
179	>
180	>	/**
181	>	* a newSingleThreadScheduledExecutor successfully runs delayed task
182	>	*/
183	>	public void testNewSingleThreadScheduledExecutor() throws Exception {
184	>	TrackedCallable callable = new TrackedCallable();
185	>	ScheduledExecutorService p1 = Executors.newSingleThreadScheduledExecutor();
186	>	Future f = p1.schedule(callable, SHORT_DELAY_MS, MILLISECONDS);
187	>	assertFalse(callable.done);
188	>	Thread.sleep(MEDIUM_DELAY_MS);
189	>	assertTrue(callable.done);
190	>	assertEquals(Boolean.TRUE, f.get());
191	>	joinPool(p1);
192	>	}
193	>
194	>	/**
195	>	* a newScheduledThreadPool successfully runs delayed task
196	>	*/
197	>	public void testnewScheduledThreadPool() throws Exception {
198	>	TrackedCallable callable = new TrackedCallable();
199	>	ScheduledExecutorService p1 = Executors.newScheduledThreadPool(2);
200	>	Future f = p1.schedule(callable, SHORT_DELAY_MS, MILLISECONDS);
201	>	assertFalse(callable.done);
202	>	Thread.sleep(MEDIUM_DELAY_MS);
203	>	assertTrue(callable.done);
204	>	assertEquals(Boolean.TRUE, f.get());
205	>	joinPool(p1);
206	>	}
207	>
208	>	/**
209	>	* an unconfigurable newScheduledThreadPool successfully runs delayed task
210	>	*/
211	>	public void testunconfigurableScheduledExecutorService() throws Exception {
212	>	TrackedCallable callable = new TrackedCallable();
213	>	ScheduledExecutorService p1 = Executors.unconfigurableScheduledExecutorService(Executors.newScheduledThreadPool(2));
214	>	Future f = p1.schedule(callable, SHORT_DELAY_MS, MILLISECONDS);
215	>	assertFalse(callable.done);
216	>	Thread.sleep(MEDIUM_DELAY_MS);
217	>	assertTrue(callable.done);
218	>	assertEquals(Boolean.TRUE, f.get());
219	>	joinPool(p1);
220	>	}
221	>
222	>	/**
223	>	* Future.get on submitted tasks will time out if they compute too long.
224	>	*/
225	>	public void testTimedCallable() throws Exception {
226	>	final Runnable sleeper = new CheckedInterruptedRunnable() {
227	>	public void realRun() throws InterruptedException {
228	>	Thread.sleep(LONG_DELAY_MS);
229	>	}};
230	>	for (ExecutorService executor :
231	>	new ExecutorService[] {
232	>	Executors.newSingleThreadExecutor(),
233	>	Executors.newCachedThreadPool(),
234	>	Executors.newFixedThreadPool(2),
235	>	Executors.newScheduledThreadPool(2),
236	>	}) {
237	>	try {
238	>	Future future = executor.submit(sleeper);
239		try {
240	<	++iters;
241	<	sum = sum.add(it.next().call());
242	<	}
243	<	catch (TimeoutException success) {
244	<	assertTrue(iters > 0);
204	<	return;
205	<	}
206	<	catch (Exception e) {
207	<	unexpectedException();
240	>	future.get(SHORT_DELAY_MS, MILLISECONDS);
241	>	shouldThrow();
242	>	} catch (TimeoutException success) {
243	>	} finally {
244	>	future.cancel(true);
245		}
246		}
247	<	// if by chance we didn't ever time out, total time must be small
248	<	long elapsed = System.currentTimeMillis() - startTime;
249	<	assertTrue(elapsed < N);
213	<	}
214	<	finally {
215	<	joinPool(executor);
247	>	finally {
248	>	joinPool(executor);
249	>	}
250		}
251		}
252
253	<
253	>
254		/**
255		* ThreadPoolExecutor using defaultThreadFactory has
256		* specified group, priority, daemon status, and name
257		*/
258	<	public void testDefaultThreadFactory() {
258	>	public void testDefaultThreadFactory() throws Exception {
259		final ThreadGroup egroup = Thread.currentThread().getThreadGroup();
260	<	Runnable r = new Runnable() {
261	<	public void run() {
260	>	Runnable r = new CheckedRunnable() {
261	>	public void realRun() {
262	>	try {
263		Thread current = Thread.currentThread();
264	<	threadAssertTrue(!current.isDaemon());
265	<	threadAssertTrue(current.getPriority() == Thread.NORM_PRIORITY);
264	>	assertTrue(!current.isDaemon());
265	>	assertTrue(current.getPriority() <= Thread.NORM_PRIORITY);
266		ThreadGroup g = current.getThreadGroup();
267		SecurityManager s = System.getSecurityManager();
268		if (s != null)
269	<	threadAssertTrue(g == s.getThreadGroup());
269	>	assertTrue(g == s.getThreadGroup());
270		else
271	<	threadAssertTrue(g == egroup);
271	>	assertTrue(g == egroup);
272		String name = current.getName();
273	<	threadAssertTrue(name.endsWith("thread-1"));
273	>	assertTrue(name.endsWith("thread-1"));
274	>	} catch (SecurityException ok) {
275	>	// Also pass if not allowed to change setting
276		}
277	<	};
277	>	}};
278		ExecutorService e = Executors.newSingleThreadExecutor(Executors.defaultThreadFactory());
279	<
279	>
280		e.execute(r);
281	<	e.shutdown();
281	>	try {
282	>	e.shutdown();
283	>	} catch (SecurityException ok) {
284	>	}
285	>
286		try {
287		Thread.sleep(SHORT_DELAY_MS);
247	–	} catch (Exception eX) {
248	–	unexpectedException();
288		} finally {
289		joinPool(e);
290		}
#	Line 256 | Line 295 | public class ExecutorsTest extends JSR16
295		* specified group, priority, daemon status, name,
296		* access control context and context class loader
297		*/
298	<	public void testPrivilegedThreadFactory() {
299	<	Policy savedPolicy = Policy.getPolicy();
300	<	AdjustablePolicy policy = new AdjustablePolicy();
301	<	policy.addPermission(new RuntimePermission("getContextClassLoader"));
302	<	policy.addPermission(new RuntimePermission("setContextClassLoader"));
303	<	Policy.setPolicy(policy);
304	<	final ThreadGroup egroup = Thread.currentThread().getThreadGroup();
305	<	final ClassLoader thisccl = Thread.currentThread().getContextClassLoader();
306	<	final AccessControlContext thisacc = AccessController.getContext();
307	<	Runnable r = new Runnable() {
308	<	public void run() {
309	<	Thread current = Thread.currentThread();
310	<	threadAssertTrue(!current.isDaemon());
311	<	threadAssertTrue(current.getPriority() == Thread.NORM_PRIORITY);
312	<	ThreadGroup g = current.getThreadGroup();
313	<	SecurityManager s = System.getSecurityManager();
314	<	if (s != null)
315	<	threadAssertTrue(g == s.getThreadGroup());
316	<	else
317	<	threadAssertTrue(g == egroup);
318	<	String name = current.getName();
319	<	threadAssertTrue(name.endsWith("thread-1"));
320	<	threadAssertTrue(thisccl == current.getContextClassLoader());
321	<	threadAssertTrue(thisacc.equals(AccessController.getContext()));
322	<	}
323	<	};
324	<	ExecutorService e = Executors.newSingleThreadExecutor(Executors.privilegedThreadFactory());
325	<
326	<	Policy.setPolicy(savedPolicy);
327	<	e.execute(r);
328	<	e.shutdown();
329	<	try {
330	<	Thread.sleep(SHORT_DELAY_MS);
331	<	} catch (Exception ex) {
332	<	unexpectedException();
333	<	} finally {
334	<	joinPool(e);
298	>	public void testPrivilegedThreadFactory() throws Exception {
299	>	Runnable r = new CheckedRunnable() {
300	>	public void realRun() throws Exception {
301	>	final ThreadGroup egroup = Thread.currentThread().getThreadGroup();
302	>	final ClassLoader thisccl = Thread.currentThread().getContextClassLoader();
303	>	final AccessControlContext thisacc = AccessController.getContext();
304	>	Runnable r = new CheckedRunnable() {
305	>	public void realRun() {
306	>	Thread current = Thread.currentThread();
307	>	assertTrue(!current.isDaemon());
308	>	assertTrue(current.getPriority() <= Thread.NORM_PRIORITY);
309	>	ThreadGroup g = current.getThreadGroup();
310	>	SecurityManager s = System.getSecurityManager();
311	>	if (s != null)
312	>	assertTrue(g == s.getThreadGroup());
313	>	else
314	>	assertTrue(g == egroup);
315	>	String name = current.getName();
316	>	assertTrue(name.endsWith("thread-1"));
317	>	assertSame(thisccl, current.getContextClassLoader());
318	>	assertEquals(thisacc, AccessController.getContext());
319	>	}};
320	>	ExecutorService e = Executors.newSingleThreadExecutor(Executors.privilegedThreadFactory());
321	>	e.execute(r);
322	>	e.shutdown();
323	>	Thread.sleep(SHORT_DELAY_MS);
324	>	joinPool(e);
325	>	}};
326	>
327	>	runWithPermissions(r,
328	>	new RuntimePermission("getClassLoader"),
329	>	new RuntimePermission("setContextClassLoader"),
330	>	new RuntimePermission("modifyThread"));
331	>	}
332	>
333	>	boolean haveCCLPermissions() {
334	>	SecurityManager sm = System.getSecurityManager();
335	>	if (sm != null) {
336	>	try {
337	>	sm.checkPermission(new RuntimePermission("setContextClassLoader"));
338	>	sm.checkPermission(new RuntimePermission("getClassLoader"));
339	>	} catch (AccessControlException e) {
340	>	return false;
341	>	}
342	>	}
343	>	return true;
344	>	}
345	>
346	>	void checkCCL() {
347	>	SecurityManager sm = System.getSecurityManager();
348	>	if (sm != null) {
349	>	sm.checkPermission(new RuntimePermission("setContextClassLoader"));
350	>	sm.checkPermission(new RuntimePermission("getClassLoader"));
351	>	}
352	>	}
353	>
354	>	class CheckCCL implements Callable<Object> {
355	>	public Object call() {
356	>	checkCCL();
357	>	return null;
358		}
359	+	}
360	+
361	+
362	+	/**
363	+	* Without class loader permissions, creating
364	+	* privilegedCallableUsingCurrentClassLoader throws ACE
365	+	*/
366	+	public void testCreatePrivilegedCallableUsingCCLWithNoPrivs() {
367	+	Runnable r = new CheckedRunnable() {
368	+	public void realRun() throws Exception {
369	+	if (System.getSecurityManager() == null)
370	+	return;
371	+	try {
372	+	Executors.privilegedCallableUsingCurrentClassLoader(new NoOpCallable());
373	+	shouldThrow();
374	+	} catch (AccessControlException success) {}
375	+	}};
376	+
377	+	runWithoutPermissions(r);
378	+	}
379	+
380	+	/**
381	+	* With class loader permissions, calling
382	+	* privilegedCallableUsingCurrentClassLoader does not throw ACE
383	+	*/
384	+	public void testprivilegedCallableUsingCCLWithPrivs() throws Exception {
385	+	Runnable r = new CheckedRunnable() {
386	+	public void realRun() throws Exception {
387	+	Executors.privilegedCallableUsingCurrentClassLoader
388	+	(new NoOpCallable())
389	+	.call();
390	+	}};
391
392	+	runWithPermissions(r,
393	+	new RuntimePermission("getClassLoader"),
394	+	new RuntimePermission("setContextClassLoader"));
395		}
396
397	+	/**
398	+	* Without permissions, calling privilegedCallable throws ACE
399	+	*/
400	+	public void testprivilegedCallableWithNoPrivs() throws Exception {
401	+	// Avoid classloader-related SecurityExceptions in swingui.TestRunner
402	+	Executors.privilegedCallable(new CheckCCL());
403	+
404	+	Runnable r = new CheckedRunnable() {
405	+	public void realRun() throws Exception {
406	+	if (System.getSecurityManager() == null)
407	+	return;
408	+	Callable task = Executors.privilegedCallable(new CheckCCL());
409	+	try {
410	+	task.call();
411	+	shouldThrow();
412	+	} catch (AccessControlException success) {}
413	+	}};
414	+
415	+	runWithoutPermissions(r);
416	+
417	+	// It seems rather difficult to test that the
418	+	// AccessControlContext of the privilegedCallable is used
419	+	// instead of its caller.  Below is a failed attempt to do
420	+	// that, which does not work because the AccessController
421	+	// cannot capture the internal state of the current Policy.
422	+	// It would be much more work to differentiate based on,
423	+	// e.g. CodeSource.
424	+
425	+	//         final AccessControlContext[] noprivAcc = new AccessControlContext[1];
426	+	//         final Callable[] task = new Callable[1];
427	+
428	+	//         runWithPermissions
429	+	//             (new CheckedRunnable() {
430	+	//                 public void realRun() {
431	+	//                     if (System.getSecurityManager() == null)
432	+	//                         return;
433	+	//                     noprivAcc[0] = AccessController.getContext();
434	+	//                     task[0] = Executors.privilegedCallable(new CheckCCL());
435	+	//                     try {
436	+	//                         AccessController.doPrivileged(new PrivilegedAction<Void>() {
437	+	//                                                           public Void run() {
438	+	//                                                               checkCCL();
439	+	//                                                               return null;
440	+	//                                                           }}, noprivAcc[0]);
441	+	//                         shouldThrow();
442	+	//                     } catch (AccessControlException success) {}
443	+	//                 }});
444	+
445	+	//         runWithPermissions
446	+	//             (new CheckedRunnable() {
447	+	//                 public void realRun() throws Exception {
448	+	//                     if (System.getSecurityManager() == null)
449	+	//                         return;
450	+	//                     // Verify that we have an underprivileged ACC
451	+	//                     try {
452	+	//                         AccessController.doPrivileged(new PrivilegedAction<Void>() {
453	+	//                                                           public Void run() {
454	+	//                                                               checkCCL();
455	+	//                                                               return null;
456	+	//                                                           }}, noprivAcc[0]);
457	+	//                         shouldThrow();
458	+	//                     } catch (AccessControlException success) {}
459	+
460	+	//                     try {
461	+	//                         task[0].call();
462	+	//                         shouldThrow();
463	+	//                     } catch (AccessControlException success) {}
464	+	//                 }},
465	+	//              new RuntimePermission("getClassLoader"),
466	+	//              new RuntimePermission("setContextClassLoader"));
467	+	}
468	+
469	+	/**
470	+	* With permissions, calling privilegedCallable succeeds
471	+	*/
472	+	public void testprivilegedCallableWithPrivs() throws Exception {
473	+	Runnable r = new CheckedRunnable() {
474	+	public void realRun() throws Exception {
475	+	Executors.privilegedCallable(new CheckCCL()).call();
476	+	}};
477	+
478	+	runWithPermissions(r,
479	+	new RuntimePermission("getClassLoader"),
480	+	new RuntimePermission("setContextClassLoader"));
481	+	}
482	+
483	+	/**
484	+	* callable(Runnable) returns null when called
485	+	*/
486	+	public void testCallable1() throws Exception {
487	+	Callable c = Executors.callable(new NoOpRunnable());
488	+	assertNull(c.call());
489	+	}
490	+
491	+	/**
492	+	* callable(Runnable, result) returns result when called
493	+	*/
494	+	public void testCallable2() throws Exception {
495	+	Callable c = Executors.callable(new NoOpRunnable(), one);
496	+	assertSame(one, c.call());
497	+	}
498	+
499	+	/**
500	+	* callable(PrivilegedAction) returns its result when called
501	+	*/
502	+	public void testCallable3() throws Exception {
503	+	Callable c = Executors.callable(new PrivilegedAction() {
504	+	public Object run() { return one; }});
505	+	assertSame(one, c.call());
506	+	}
507	+
508	+	/**
509	+	* callable(PrivilegedExceptionAction) returns its result when called
510	+	*/
511	+	public void testCallable4() throws Exception {
512	+	Callable c = Executors.callable(new PrivilegedExceptionAction() {
513	+	public Object run() { return one; }});
514	+	assertSame(one, c.call());
515	+	}
516	+
517	+
518	+	/**
519	+	* callable(null Runnable) throws NPE
520	+	*/
521	+	public void testCallableNPE1() {
522	+	try {
523	+	Callable c = Executors.callable((Runnable) null);
524	+	shouldThrow();
525	+	} catch (NullPointerException success) {}
526	+	}
527	+
528	+	/**
529	+	* callable(null, result) throws NPE
530	+	*/
531	+	public void testCallableNPE2() {
532	+	try {
533	+	Callable c = Executors.callable((Runnable) null, one);
534	+	shouldThrow();
535	+	} catch (NullPointerException success) {}
536	+	}
537	+
538	+	/**
539	+	* callable(null PrivilegedAction) throws NPE
540	+	*/
541	+	public void testCallableNPE3() {
542	+	try {
543	+	Callable c = Executors.callable((PrivilegedAction) null);
544	+	shouldThrow();
545	+	} catch (NullPointerException success) {}
546	+	}
547	+
548	+	/**
549	+	* callable(null PrivilegedExceptionAction) throws NPE
550	+	*/
551	+	public void testCallableNPE4() {
552	+	try {
553	+	Callable c = Executors.callable((PrivilegedExceptionAction) null);
554	+	shouldThrow();
555	+	} catch (NullPointerException success) {}
556	+	}
557	+
558	+
559		}

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