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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.3 by dl, Fri Sep 12 15:40:25 2003 UTC vs.
Revision 1.39 by jsr166, Fri Aug 22 03:30:56 2014 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
9		import junit.framework.*;
10	<	import java.util.concurrent.*;
10	>	import java.util.concurrent.Callable;
11	>	import java.util.concurrent.CancellationException;
12	>	import java.util.concurrent.CountDownLatch;
13	>	import java.util.concurrent.ExecutorService;
14	>	import java.util.concurrent.Executors;
15	>	import java.util.concurrent.ExecutionException;
16	>	import java.util.concurrent.Future;
17	>	import java.util.concurrent.FutureTask;
18	>	import java.util.concurrent.TimeoutException;
19	>	import java.util.concurrent.atomic.AtomicInteger;
20	>	import static java.util.concurrent.TimeUnit.*;
21	>	import java.util.*;
22
23	<	public class FutureTaskTest extends TestCase {
23	>	public class FutureTaskTest extends JSR166TestCase {
24
25		public static void main(String[] args) {
26	<	junit.textui.TestRunner.run (suite());
26	>	junit.textui.TestRunner.run(suite());
27		}
28		public static Test suite() {
29	<	return new TestSuite(FutureTaskTest.class);
29	>	return new TestSuite(FutureTaskTest.class);
30		}
31
32	<	private static long SHORT_DELAY_MS = 100;
33	<	private static long MEDIUM_DELAY_MS = 1000;
34	<	private static long LONG_DELAY_MS = 10000;
32	>	void checkIsDone(Future<?> f) {
33	>	assertTrue(f.isDone());
34	>	assertFalse(f.cancel(false));
35	>	assertFalse(f.cancel(true));
36	>	if (f instanceof PublicFutureTask) {
37	>	PublicFutureTask pf = (PublicFutureTask) f;
38	>	assertEquals(1, pf.doneCount());
39	>	assertFalse(pf.runAndReset());
40	>	assertEquals(1, pf.doneCount());
41	>	Object r = null; Object exInfo = null;
42	>	try {
43	>	r = f.get();
44	>	} catch (CancellationException t) {
45	>	exInfo = CancellationException.class;
46	>	} catch (ExecutionException t) {
47	>	exInfo = t.getCause();
48	>	} catch (Throwable t) {
49	>	threadUnexpectedException(t);
50	>	}
51	>
52	>	// Check that run and runAndReset have no effect.
53	>	int savedRunCount = pf.runCount();
54	>	pf.run();
55	>	pf.runAndReset();
56	>	assertEquals(savedRunCount, pf.runCount());
57	>	try {
58	>	assertSame(r, f.get());
59	>	} catch (CancellationException t) {
60	>	assertSame(exInfo, CancellationException.class);
61	>	} catch (ExecutionException t) {
62	>	assertSame(exInfo, t.getCause());
63	>	} catch (Throwable t) {
64	>	threadUnexpectedException(t);
65	>	}
66	>	assertTrue(f.isDone());
67	>	}
68	>	}
69	>
70	>	void checkNotDone(Future<?> f) {
71	>	assertFalse(f.isDone());
72	>	assertFalse(f.isCancelled());
73	>	if (f instanceof PublicFutureTask) {
74	>	PublicFutureTask pf = (PublicFutureTask) f;
75	>	assertEquals(0, pf.doneCount());
76	>	assertEquals(0, pf.setCount());
77	>	assertEquals(0, pf.setExceptionCount());
78	>	}
79	>	}
80	>
81	>	void checkIsRunning(Future<?> f) {
82	>	checkNotDone(f);
83	>	if (f instanceof FutureTask) {
84	>	FutureTask ft = (FutureTask<?>) f;
85	>	// Check that run methods do nothing
86	>	ft.run();
87	>	if (f instanceof PublicFutureTask) {
88	>	PublicFutureTask pf = (PublicFutureTask) f;
89	>	int savedRunCount = pf.runCount();
90	>	pf.run();
91	>	assertFalse(pf.runAndReset());
92	>	assertEquals(savedRunCount, pf.runCount());
93	>	}
94	>	checkNotDone(f);
95	>	}
96	>	}
97	>
98	>	<T> void checkCompletedNormally(Future<T> f, T expected) {
99	>	checkIsDone(f);
100	>	assertFalse(f.isCancelled());
101
24	–	public void testConstructor(){
102		try {
103	<	FutureTask task = new FutureTask(null);
104	<	fail("should throw");
105	<	}
106	<	catch(NullPointerException success) {
107	<	}
103	>	assertSame(expected, f.get());
104	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
105	>	try {
106	>	assertSame(expected, f.get(5L, SECONDS));
107	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
108		}
109
110	<	public void testConstructor2(){
110	>	void checkCancelled(Future<?> f) {
111	>	checkIsDone(f);
112	>	assertTrue(f.isCancelled());
113	>
114		try {
115	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
116	<	fail("should throw");
117	<	}
118	<	catch(NullPointerException success) {
115	>	f.get();
116	>	shouldThrow();
117	>	} catch (CancellationException success) {
118	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
119	>
120	>	try {
121	>	f.get(5L, SECONDS);
122	>	shouldThrow();
123	>	} catch (CancellationException success) {
124	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
125	>	}
126	>
127	>	void tryToConfuseDoneTask(PublicFutureTask pf) {
128	>	pf.set(new Object());
129	>	pf.setException(new Error());
130	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
131	>	pf.cancel(true);
132		}
133		}
134
135	<	public void testIsDone(){
136	<	FutureTask task = new FutureTask( new Callable() {
137	<	public Object call() { return Boolean.TRUE; } });
138	<	task.run();
139	<	assertTrue(task.isDone());
140	<	assertFalse(task.isCancelled());
135	>	void checkCompletedAbnormally(Future<?> f, Throwable t) {
136	>	checkIsDone(f);
137	>	assertFalse(f.isCancelled());
138	>
139	>	try {
140	>	f.get();
141	>	shouldThrow();
142	>	} catch (ExecutionException success) {
143	>	assertSame(t, success.getCause());
144	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
145	>
146	>	try {
147	>	f.get(5L, SECONDS);
148	>	shouldThrow();
149	>	} catch (ExecutionException success) {
150	>	assertSame(t, success.getCause());
151	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
152	>	}
153	>
154	>	/**
155	>	* Subclass to expose protected methods
156	>	*/
157	>	static class PublicFutureTask extends FutureTask {
158	>	private final AtomicInteger runCount;
159	>	private final AtomicInteger doneCount = new AtomicInteger(0);
160	>	private final AtomicInteger runAndResetCount = new AtomicInteger(0);
161	>	private final AtomicInteger setCount = new AtomicInteger(0);
162	>	private final AtomicInteger setExceptionCount = new AtomicInteger(0);
163	>	public int runCount() { return runCount.get(); }
164	>	public int doneCount() { return doneCount.get(); }
165	>	public int runAndResetCount() { return runAndResetCount.get(); }
166	>	public int setCount() { return setCount.get(); }
167	>	public int setExceptionCount() { return setExceptionCount.get(); }
168	>
169	>	PublicFutureTask(Runnable runnable) {
170	>	this(runnable, seven);
171	>	}
172	>	PublicFutureTask(Runnable runnable, Object result) {
173	>	this(runnable, result, new AtomicInteger(0));
174	>	}
175	>	private PublicFutureTask(final Runnable runnable, Object result,
176	>	final AtomicInteger runCount) {
177	>	super(new Runnable() {
178	>	public void run() {
179	>	runCount.getAndIncrement();
180	>	runnable.run();
181	>	}}, result);
182	>	this.runCount = runCount;
183	>	}
184	>	PublicFutureTask(Callable callable) {
185	>	this(callable, new AtomicInteger(0));
186	>	}
187	>	private PublicFutureTask(final Callable callable,
188	>	final AtomicInteger runCount) {
189	>	super(new Callable() {
190	>	public Object call() throws Exception {
191	>	runCount.getAndIncrement();
192	>	return callable.call();
193	>	}});
194	>	this.runCount = runCount;
195	>	}
196	>	@Override public void done() {
197	>	assertTrue(isDone());
198	>	doneCount.incrementAndGet();
199	>	super.done();
200	>	}
201	>	@Override public boolean runAndReset() {
202	>	runAndResetCount.incrementAndGet();
203	>	return super.runAndReset();
204	>	}
205	>	@Override public void set(Object x) {
206	>	setCount.incrementAndGet();
207	>	super.set(x);
208	>	}
209	>	@Override public void setException(Throwable t) {
210	>	setExceptionCount.incrementAndGet();
211	>	super.setException(t);
212	>	}
213	>	}
214	>
215	>	class Counter extends CheckedRunnable {
216	>	final AtomicInteger count = new AtomicInteger(0);
217	>	public int get() { return count.get(); }
218	>	public void realRun() {
219	>	count.getAndIncrement();
220	>	}
221	>	}
222	>
223	>	/**
224	>	* creating a future with a null callable throws NullPointerException
225	>	*/
226	>	public void testConstructor() {
227	>	try {
228	>	new FutureTask(null);
229	>	shouldThrow();
230	>	} catch (NullPointerException success) {}
231		}
232
233	+	/**
234	+	* creating a future with null runnable throws NullPointerException
235	+	*/
236	+	public void testConstructor2() {
237	+	try {
238	+	new FutureTask(null, Boolean.TRUE);
239	+	shouldThrow();
240	+	} catch (NullPointerException success) {}
241	+	}
242	+
243	+	/**
244	+	* isDone is true when a task completes
245	+	*/
246	+	public void testIsDone() {
247	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
248	+	assertFalse(task.isDone());
249	+	task.run();
250	+	assertTrue(task.isDone());
251	+	checkCompletedNormally(task, Boolean.TRUE);
252	+	assertEquals(1, task.runCount());
253	+	}
254	+
255	+	/**
256	+	* runAndReset of a non-cancelled task succeeds
257	+	*/
258	+	public void testRunAndReset() {
259	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
260	+	for (int i = 0; i < 3; i++) {
261	+	assertTrue(task.runAndReset());
262	+	checkNotDone(task);
263	+	assertEquals(i+1, task.runCount());
264	+	assertEquals(i+1, task.runAndResetCount());
265	+	assertEquals(0, task.setCount());
266	+	assertEquals(0, task.setExceptionCount());
267	+	}
268	+	}
269	+
270	+	/**
271	+	* runAndReset after cancellation fails
272	+	*/
273	+	public void testRunAndResetAfterCancel() {
274	+	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
275	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
276	+	assertTrue(task.cancel(mayInterruptIfRunning));
277	+	for (int i = 0; i < 3; i++) {
278	+	assertFalse(task.runAndReset());
279	+	assertEquals(0, task.runCount());
280	+	assertEquals(i+1, task.runAndResetCount());
281	+	assertEquals(0, task.setCount());
282	+	assertEquals(0, task.setExceptionCount());
283	+	}
284	+	tryToConfuseDoneTask(task);
285	+	checkCancelled(task);
286	+	}
287	+	}
288	+
289	+	/**
290	+	* setting value causes get to return it
291	+	*/
292	+	public void testSet() throws Exception {
293	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
294	+	task.set(one);
295	+	for (int i = 0; i < 3; i++) {
296	+	assertSame(one, task.get());
297	+	assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS));
298	+	assertEquals(1, task.setCount());
299	+	}
300	+	tryToConfuseDoneTask(task);
301	+	checkCompletedNormally(task, one);
302	+	assertEquals(0, task.runCount());
303	+	}
304	+
305	+	/**
306	+	* setException causes get to throw ExecutionException
307	+	*/
308	+	public void testSetException_get() throws Exception {
309	+	Exception nse = new NoSuchElementException();
310	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
311	+	task.setException(nse);
312	+
313	+	try {
314	+	task.get();
315	+	shouldThrow();
316	+	} catch (ExecutionException success) {
317	+	assertSame(nse, success.getCause());
318	+	checkCompletedAbnormally(task, nse);
319	+	}
320	+
321	+	try {
322	+	task.get(LONG_DELAY_MS, MILLISECONDS);
323	+	shouldThrow();
324	+	} catch (ExecutionException success) {
325	+	assertSame(nse, success.getCause());
326	+	checkCompletedAbnormally(task, nse);
327	+	}
328	+
329	+	assertEquals(1, task.setExceptionCount());
330	+	assertEquals(0, task.setCount());
331	+	tryToConfuseDoneTask(task);
332	+	checkCompletedAbnormally(task, nse);
333	+	assertEquals(0, task.runCount());
334	+	}
335	+
336	+	/**
337	+	* cancel(false) before run succeeds
338	+	*/
339		public void testCancelBeforeRun() {
340	<	FutureTask task = new FutureTask( new Callable() {
52	<	public Object call() { return Boolean.TRUE; } });
340	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
341		assertTrue(task.cancel(false));
342	<	task.run();
343	<	assertTrue(task.isDone());
344	<	assertTrue(task.isCancelled());
342	>	task.run();
343	>	assertEquals(0, task.runCount());
344	>	assertEquals(0, task.setCount());
345	>	assertEquals(0, task.setExceptionCount());
346	>	assertTrue(task.isCancelled());
347	>	assertTrue(task.isDone());
348	>	tryToConfuseDoneTask(task);
349	>	assertEquals(0, task.runCount());
350	>	checkCancelled(task);
351		}
352
353	+	/**
354	+	* cancel(true) before run succeeds
355	+	*/
356		public void testCancelBeforeRun2() {
357	<	FutureTask task = new FutureTask( new Callable() {
61	<	public Object call() { return Boolean.TRUE; } });
357	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
358		assertTrue(task.cancel(true));
359	<	task.run();
360	<	assertTrue(task.isDone());
361	<	assertTrue(task.isCancelled());
359	>	task.run();
360	>	assertEquals(0, task.runCount());
361	>	assertEquals(0, task.setCount());
362	>	assertEquals(0, task.setExceptionCount());
363	>	assertTrue(task.isCancelled());
364	>	assertTrue(task.isDone());
365	>	tryToConfuseDoneTask(task);
366	>	assertEquals(0, task.runCount());
367	>	checkCancelled(task);
368		}
369
370	+	/**
371	+	* cancel(false) of a completed task fails
372	+	*/
373		public void testCancelAfterRun() {
374	<	FutureTask task = new FutureTask( new Callable() {
375	<	public Object call() { return Boolean.TRUE; } });
71	<	task.run();
374	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
375	>	task.run();
376		assertFalse(task.cancel(false));
377	<	assertTrue(task.isDone());
378	<	assertFalse(task.isCancelled());
379	<	}
377	>	assertEquals(1, task.runCount());
378	>	assertEquals(1, task.setCount());
379	>	assertEquals(0, task.setExceptionCount());
380	>	tryToConfuseDoneTask(task);
381	>	checkCompletedNormally(task, Boolean.TRUE);
382	>	assertEquals(1, task.runCount());
383	>	}
384	>
385	>	/**
386	>	* cancel(true) of a completed task fails
387	>	*/
388	>	public void testCancelAfterRun2() {
389	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
390	>	task.run();
391	>	assertFalse(task.cancel(true));
392	>	assertEquals(1, task.runCount());
393	>	assertEquals(1, task.setCount());
394	>	assertEquals(0, task.setExceptionCount());
395	>	tryToConfuseDoneTask(task);
396	>	checkCompletedNormally(task, Boolean.TRUE);
397	>	assertEquals(1, task.runCount());
398	>	}
399	>
400	>	/**
401	>	* cancel(true) interrupts a running task that subsequently succeeds
402	>	*/
403	>	public void testCancelInterrupt() {
404	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
405	>	final PublicFutureTask task =
406	>	new PublicFutureTask(new CheckedRunnable() {
407	>	public void realRun() {
408	>	pleaseCancel.countDown();
409	>	try {
410	>	delay(LONG_DELAY_MS);
411	>	shouldThrow();
412	>	} catch (InterruptedException success) {}
413	>	}});
414	>
415	>	Thread t = newStartedThread(task);
416	>	await(pleaseCancel);
417	>	assertTrue(task.cancel(true));
418	>	assertTrue(task.isCancelled());
419	>	assertTrue(task.isDone());
420	>	awaitTermination(t);
421	>	assertEquals(1, task.runCount());
422	>	assertEquals(1, task.setCount());
423	>	assertEquals(0, task.setExceptionCount());
424	>	tryToConfuseDoneTask(task);
425	>	checkCancelled(task);
426	>	}
427	>
428	>	/**
429	>	* cancel(true) tries to interrupt a running task, but
430	>	* Thread.interrupt throws (simulating a restrictive security
431	>	* manager)
432	>	*/
433	>	public void testCancelInterrupt_ThrowsSecurityException() {
434	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
435	>	final CountDownLatch cancelled = new CountDownLatch(1);
436	>	final PublicFutureTask task =
437	>	new PublicFutureTask(new CheckedRunnable() {
438	>	public void realRun() {
439	>	pleaseCancel.countDown();
440	>	await(cancelled);
441	>	assertFalse(Thread.interrupted());
442	>	}});
443	>
444	>	final Thread t = new Thread(task) {
445	>	// Simulate a restrictive security manager.
446	>	@Override public void interrupt() {
447	>	throw new SecurityException();
448	>	}};
449	>	t.setDaemon(true);
450	>	t.start();
451
452	<	public void testCancelInterrupt(){
453	<	FutureTask task = new FutureTask( new Callable() {
454	<	public Object call() {
452	>	await(pleaseCancel);
453	>	try {
454	>	task.cancel(true);
455	>	shouldThrow();
456	>	} catch (SecurityException expected) {}
457	>
458	>	// We failed to deliver the interrupt, but the world retains
459	>	// its sanity, as if we had done task.cancel(false)
460	>	assertTrue(task.isCancelled());
461	>	assertTrue(task.isDone());
462	>	assertEquals(1, task.runCount());
463	>	assertEquals(1, task.doneCount());
464	>	assertEquals(0, task.setCount());
465	>	assertEquals(0, task.setExceptionCount());
466	>	cancelled.countDown();
467	>	awaitTermination(t);
468	>	assertEquals(1, task.setCount());
469	>	assertEquals(0, task.setExceptionCount());
470	>	tryToConfuseDoneTask(task);
471	>	checkCancelled(task);
472	>	}
473	>
474	>	/**
475	>	* cancel(true) interrupts a running task that subsequently throws
476	>	*/
477	>	public void testCancelInterrupt_taskFails() {
478	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
479	>	final PublicFutureTask task =
480	>	new PublicFutureTask(new Runnable() {
481	>	public void run() {
482		try {
483	<	Thread.sleep(SHORT_DELAY_MS* 2);
484	<	fail("should throw");
485	<	}
486	<	catch (InterruptedException success) {}
483	>	pleaseCancel.countDown();
484	>	delay(LONG_DELAY_MS);
485	>	threadShouldThrow();
486	>	} catch (InterruptedException success) {
487	>	} catch (Throwable t) { threadUnexpectedException(t); }
488	>	throw new RuntimeException();
489	>	}});
490	>
491	>	Thread t = newStartedThread(task);
492	>	await(pleaseCancel);
493	>	assertTrue(task.cancel(true));
494	>	assertTrue(task.isCancelled());
495	>	awaitTermination(t);
496	>	assertEquals(1, task.runCount());
497	>	assertEquals(0, task.setCount());
498	>	assertEquals(1, task.setExceptionCount());
499	>	tryToConfuseDoneTask(task);
500	>	checkCancelled(task);
501	>	}
502	>
503	>	/**
504	>	* cancel(false) does not interrupt a running task
505	>	*/
506	>	public void testCancelNoInterrupt() {
507	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
508	>	final CountDownLatch cancelled = new CountDownLatch(1);
509	>	final PublicFutureTask task =
510	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
511	>	public Boolean realCall() {
512	>	pleaseCancel.countDown();
513	>	await(cancelled);
514	>	assertFalse(Thread.interrupted());
515		return Boolean.TRUE;
516	<	} });
517	<	Thread t = new  Thread(task);
518	<	t.start();
519	<
520	<	try{
521	<	Thread.sleep(SHORT_DELAY_MS);
522	<	assertTrue(task.cancel(true));
523	<	t.join();
524	<	assertTrue(task.isDone());
525	<	assertTrue(task.isCancelled());
526	<	} catch(InterruptedException e){
527	<	fail("unexpected exception");
516	>	}});
517	>
518	>	Thread t = newStartedThread(task);
519	>	await(pleaseCancel);
520	>	assertTrue(task.cancel(false));
521	>	assertTrue(task.isCancelled());
522	>	cancelled.countDown();
523	>	awaitTermination(t);
524	>	assertEquals(1, task.runCount());
525	>	assertEquals(1, task.setCount());
526	>	assertEquals(0, task.setExceptionCount());
527	>	tryToConfuseDoneTask(task);
528	>	checkCancelled(task);
529	>	}
530	>
531	>	/**
532	>	* run in one thread causes get in another thread to retrieve value
533	>	*/
534	>	public void testGetRun() {
535	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
536	>
537	>	final PublicFutureTask task =
538	>	new PublicFutureTask(new CheckedCallable<Object>() {
539	>	public Object realCall() {
540	>	return two;
541	>	}});
542	>
543	>	Thread t1 = newStartedThread(new CheckedRunnable() {
544	>	public void realRun() throws Exception {
545	>	pleaseRun.countDown();
546	>	assertSame(two, task.get());
547	>	}});
548	>
549	>	Thread t2 = newStartedThread(new CheckedRunnable() {
550	>	public void realRun() throws Exception {
551	>	pleaseRun.countDown();
552	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
553	>	}});
554	>
555	>	await(pleaseRun);
556	>	checkNotDone(task);
557	>	assertTrue(t1.isAlive());
558	>	assertTrue(t2.isAlive());
559	>	task.run();
560	>	checkCompletedNormally(task, two);
561	>	assertEquals(1, task.runCount());
562	>	assertEquals(1, task.setCount());
563	>	assertEquals(0, task.setExceptionCount());
564	>	awaitTermination(t1);
565	>	awaitTermination(t2);
566	>	tryToConfuseDoneTask(task);
567	>	checkCompletedNormally(task, two);
568	>	}
569	>
570	>	/**
571	>	* set in one thread causes get in another thread to retrieve value
572	>	*/
573	>	public void testGetSet() {
574	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
575	>
576	>	final PublicFutureTask task =
577	>	new PublicFutureTask(new CheckedCallable<Object>() {
578	>	public Object realCall() throws InterruptedException {
579	>	return two;
580	>	}});
581	>
582	>	Thread t1 = newStartedThread(new CheckedRunnable() {
583	>	public void realRun() throws Exception {
584	>	pleaseSet.countDown();
585	>	assertSame(two, task.get());
586	>	}});
587	>
588	>	Thread t2 = newStartedThread(new CheckedRunnable() {
589	>	public void realRun() throws Exception {
590	>	pleaseSet.countDown();
591	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
592	>	}});
593	>
594	>	await(pleaseSet);
595	>	checkNotDone(task);
596	>	assertTrue(t1.isAlive());
597	>	assertTrue(t2.isAlive());
598	>	task.set(two);
599	>	assertEquals(0, task.runCount());
600	>	assertEquals(1, task.setCount());
601	>	assertEquals(0, task.setExceptionCount());
602	>	tryToConfuseDoneTask(task);
603	>	checkCompletedNormally(task, two);
604	>	awaitTermination(t1);
605	>	awaitTermination(t2);
606	>	}
607	>
608	>	/**
609	>	* Cancelling a task causes timed get in another thread to throw
610	>	* CancellationException
611	>	*/
612	>	public void testTimedGet_Cancellation() {
613	>	testTimedGet_Cancellation(false);
614	>	}
615	>	public void testTimedGet_Cancellation_interrupt() {
616	>	testTimedGet_Cancellation(true);
617	>	}
618	>	public void testTimedGet_Cancellation(final boolean mayInterruptIfRunning) {
619	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
620	>	final CountDownLatch cancelled = new CountDownLatch(1);
621	>	final Callable<Object> callable =
622	>	new CheckedCallable<Object>() {
623	>	public Object realCall() throws InterruptedException {
624	>	pleaseCancel.countDown();
625	>	if (mayInterruptIfRunning) {
626	>	try {
627	>	delay(2*LONG_DELAY_MS);
628	>	} catch (InterruptedException success) {}
629	>	} else {
630	>	await(cancelled);
631	>	}
632	>	return two;
633	>	}};
634	>	final PublicFutureTask task = new PublicFutureTask(callable);
635	>
636	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
637	>	public void realRun() throws Exception {
638	>	pleaseCancel.countDown();
639	>	task.get();
640	>	}};
641	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
642	>	public void realRun() throws Exception {
643	>	pleaseCancel.countDown();
644	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
645	>	}};
646	>	t1.start();
647	>	t2.start();
648	>	Thread t3 = newStartedThread(task);
649	>	await(pleaseCancel);
650	>	checkIsRunning(task);
651	>	task.cancel(mayInterruptIfRunning);
652	>	checkCancelled(task);
653	>	awaitTermination(t1);
654	>	awaitTermination(t2);
655	>	cancelled.countDown();
656	>	awaitTermination(t3);
657	>	assertEquals(1, task.runCount());
658	>	assertEquals(1, task.setCount());
659	>	assertEquals(0, task.setExceptionCount());
660	>	tryToConfuseDoneTask(task);
661	>	checkCancelled(task);
662	>	}
663	>
664	>	/**
665	>	* A runtime exception in task causes get to throw ExecutionException
666	>	*/
667	>	public void testGet_ExecutionException() throws InterruptedException {
668	>	final ArithmeticException e = new ArithmeticException();
669	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
670	>	public Object call() {
671	>	throw e;
672	>	}});
673	>
674	>	task.run();
675	>	assertEquals(1, task.runCount());
676	>	assertEquals(0, task.setCount());
677	>	assertEquals(1, task.setExceptionCount());
678	>	try {
679	>	task.get();
680	>	shouldThrow();
681	>	} catch (ExecutionException success) {
682	>	assertSame(e, success.getCause());
683	>	tryToConfuseDoneTask(task);
684	>	checkCompletedAbnormally(task, success.getCause());
685		}
686		}
687
688	+	/**
689	+	* A runtime exception in task causes timed get to throw ExecutionException
690	+	*/
691	+	public void testTimedGet_ExecutionException2() throws Exception {
692	+	final ArithmeticException e = new ArithmeticException();
693	+	final PublicFutureTask task = new PublicFutureTask(new Callable() {
694	+	public Object call() {
695	+	throw e;
696	+	}});
697
698	<	public void testCancelNoInterrupt(){
699	<	FutureTask task = new FutureTask( new Callable() {
700	<	public Object call() {
701	<	try {
702	<	Thread.sleep(SHORT_DELAY_MS* 2);
703	<	}
704	<	catch (InterruptedException success) {
705	<	fail("should not interrupt");
706	<	}
707	<	return Boolean.TRUE;
708	<	} });
709	<	Thread t = new  Thread(task);
710	<	t.start();
711	<
712	<	try{
713	<	Thread.sleep(SHORT_DELAY_MS);
714	<	assertTrue(task.cancel(false));
715	<	t.join();
716	<	assertTrue(task.isDone());
717	<	assertTrue(task.isCancelled());
718	<	} catch(InterruptedException e){
719	<	fail("unexpected exception");
698	>	task.run();
699	>	try {
700	>	task.get(LONG_DELAY_MS, MILLISECONDS);
701	>	shouldThrow();
702	>	} catch (ExecutionException success) {
703	>	assertSame(e, success.getCause());
704	>	tryToConfuseDoneTask(task);
705	>	checkCompletedAbnormally(task, success.getCause());
706	>	}
707	>	}
708	>
709	>	/**
710	>	* get is interruptible
711	>	*/
712	>	public void testGet_interruptible() {
713	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
714	>	final FutureTask task = new FutureTask(new NoOpCallable());
715	>	Thread t = newStartedThread(new CheckedRunnable() {
716	>	public void realRun() throws Exception {
717	>	Thread.currentThread().interrupt();
718	>	try {
719	>	task.get();
720	>	shouldThrow();
721	>	} catch (InterruptedException success) {}
722	>	assertFalse(Thread.interrupted());
723	>
724	>	pleaseInterrupt.countDown();
725	>	try {
726	>	task.get();
727	>	shouldThrow();
728	>	} catch (InterruptedException success) {}
729	>	assertFalse(Thread.interrupted());
730	>	}});
731	>
732	>	await(pleaseInterrupt);
733	>	t.interrupt();
734	>	awaitTermination(t);
735	>	checkNotDone(task);
736	>	}
737	>
738	>	/**
739	>	* timed get is interruptible
740	>	*/
741	>	public void testTimedGet_interruptible() {
742	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
743	>	final FutureTask task = new FutureTask(new NoOpCallable());
744	>	Thread t = newStartedThread(new CheckedRunnable() {
745	>	public void realRun() throws Exception {
746	>	Thread.currentThread().interrupt();
747	>	try {
748	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
749	>	shouldThrow();
750	>	} catch (InterruptedException success) {}
751	>	assertFalse(Thread.interrupted());
752	>
753	>	pleaseInterrupt.countDown();
754	>	try {
755	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
756	>	shouldThrow();
757	>	} catch (InterruptedException success) {}
758	>	assertFalse(Thread.interrupted());
759	>	}});
760	>
761	>	await(pleaseInterrupt);
762	>	t.interrupt();
763	>	awaitTermination(t);
764	>	checkNotDone(task);
765	>	}
766	>
767	>	/**
768	>	* A timed out timed get throws TimeoutException
769	>	*/
770	>	public void testGet_TimeoutException() throws Exception {
771	>	FutureTask task = new FutureTask(new NoOpCallable());
772	>	long startTime = System.nanoTime();
773	>	try {
774	>	task.get(timeoutMillis(), MILLISECONDS);
775	>	shouldThrow();
776	>	} catch (TimeoutException success) {
777	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
778		}
779		}
780
781	<	public void testGet1() {
782	<	final FutureTask ft = new FutureTask(new Callable(){
783	<	public Object call(){
784	<	try{
785	<	Thread.sleep(MEDIUM_DELAY_MS);
786	<	} catch(InterruptedException e){
787	<	fail("unexpected exception");
788	<	}
789	<	return Boolean.TRUE;
790	<	}
791	<	});
792	<	Thread t = new Thread(new Runnable(){
793	<	public void run(){
794	<	try{
795	<	ft.get();
796	<	} catch(Exception e){
797	<	fail("unexpected exception");
798	<	}
799	<	}
800	<	});
801	<	try{
802	<	assertFalse(ft.isDone());
149	<	assertFalse(ft.isCancelled());
150	<	t.start();
151	<	Thread.sleep(SHORT_DELAY_MS);
152	<	ft.run();
153	<	t.join();
154	<	assertTrue(ft.isDone());
155	<	assertFalse(ft.isCancelled());
156	<	} catch(InterruptedException e){
157	<	fail("unexpected exception");
158	<
159	<	}
160	<	}
161	<
162	<	public void testTimedGet1() {
163	<	final FutureTask ft = new FutureTask(new Callable(){
164	<	public Object call(){
165	<	try{
166	<	Thread.sleep(MEDIUM_DELAY_MS);
167	<	} catch(InterruptedException e){
168	<	fail("unexpected exception");
169	<	}
170	<	return Boolean.TRUE;
171	<	}
172	<	});
173	<	Thread t = new Thread(new Runnable(){
174	<	public void run(){
175	<	try{
176	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
177	<	} catch(TimeoutException success) {
178	<	} catch(Exception e){
179	<	fail("unexpected exception");
180	<	}
181	<	}
182	<	});
183	<	try{
184	<	assertFalse(ft.isDone());
185	<	assertFalse(ft.isCancelled());
186	<	t.start();
187	<	ft.run();
188	<	t.join();
189	<	assertTrue(ft.isDone());
190	<	assertFalse(ft.isCancelled());
191	<	} catch(InterruptedException e){
192	<	fail("unexpected exception");
193	<
194	<	}
781	>	/**
782	>	* timed get with null TimeUnit throws NullPointerException
783	>	*/
784	>	public void testGet_NullTimeUnit() throws Exception {
785	>	FutureTask task = new FutureTask(new NoOpCallable());
786	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
787	>
788	>	for (long timeout : timeouts) {
789	>	try {
790	>	task.get(timeout, null);
791	>	shouldThrow();
792	>	} catch (NullPointerException success) {}
793	>	}
794	>
795	>	task.run();
796	>
797	>	for (long timeout : timeouts) {
798	>	try {
799	>	task.get(timeout, null);
800	>	shouldThrow();
801	>	} catch (NullPointerException success) {}
802	>	}
803		}
804
805	<
806	<	public void testGet_Cancellation(){
807	<	final FutureTask ft = new FutureTask(new Callable(){
808	<	public Object call(){
809	<	try{
810	<	Thread.sleep(MEDIUM_DELAY_MS);
811	<	} catch(InterruptedException e){
812	<	fail("unexpected exception");
813	<	}
814	<	return Boolean.TRUE;
815	<	}
816	<	});
817	<	try {
818	<	Thread.sleep(SHORT_DELAY_MS);
819	<	Thread t = new Thread(new Runnable(){
820	<	public void run(){
821	<	try{
822	<	ft.get();
823	<	fail("should throw");
824	<	} catch(CancellationException success){
825	<	}
826	<	catch(Exception e){
827	<	fail("unexpected exception");
828	<	}
829	<	}
222	<	});
223	<	t.start();
224	<	ft.cancel(true);
225	<	t.join();
226	<	} catch(InterruptedException success){
227	<	fail("unexpected exception");
228	<	}
229	<	}
230	<
231	<	public void testGet_Cancellation2(){
232	<	final FutureTask ft = new FutureTask(new Callable(){
233	<	public Object call(){
234	<	try{
235	<	Thread.sleep(SHORT_DELAY_MS);
236	<	} catch(InterruptedException e) {
237	<	fail("unexpected exception");
238	<	}
239	<	return Boolean.TRUE;
240	<	}
241	<	});
242	<	try{
243	<	Thread.sleep(100);
244	<	Thread t = new Thread(new Runnable(){
245	<	public void run(){
246	<	try{
247	<	ft.get(3 * SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
248	<	fail("should throw");
249	<	} catch(CancellationException success) {}
250	<	catch(Exception e){
251	<	fail("unexpected exception");
252	<	}
253	<	}
254	<	});
255	<	t.start();
256	<	Thread.sleep(SHORT_DELAY_MS);
257	<	ft.cancel(true);
258	<	Thread.sleep(SHORT_DELAY_MS);
259	<	t.join();
260	<	} catch(InterruptedException ie){
261	<	fail("unexpected exception");
262	<	}
263	<	}
264	<
265	<	public void testGet_ExecutionException(){
266	<	final FutureTask ft = new FutureTask(new Callable(){
267	<	public Object call(){
268	<	int i = 5/0;
269	<	return Boolean.TRUE;
270	<	}
271	<	});
272	<	try{
273	<	ft.run();
274	<	ft.get();
275	<	fail("should throw");
276	<	} catch(ExecutionException success){
277	<	}
278	<	catch(Exception e){
279	<	fail("unexpected exception");
280	<	}
281	<	}
282	<
283	<	public void testTimedGet_ExecutionException2(){
284	<	final FutureTask ft = new FutureTask(new Callable(){
285	<	public Object call(){
286	<	int i = 5/0;
287	<	return Boolean.TRUE;
288	<	}
289	<	});
290	<	try{
291	<	ft.run();
292	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
293	<	fail("should throw");
294	<	} catch(ExecutionException success) {
295	<	} catch(TimeoutException success) { } // unlikely but OK
296	<	catch(Exception e){
297	<	fail("unexpected exception");
298	<	}
299	<	}
300	<
301	<
302	<	public void testGet_InterruptedException(){
303	<	final FutureTask ft = new FutureTask(new Callable(){
304	<	public Object call(){
305	<	return new Object();
306	<	}
307	<	});
308	<	Thread t = new Thread(new Runnable(){
309	<	public void run(){
310	<	try{
311	<	ft.get();
312	<	fail("should throw");
313	<	} catch(InterruptedException success){
314	<	} catch(Exception e){
315	<	fail("unexpected exception");
316	<	}
317	<	}
318	<	});
319	<	try {
320	<	t.start();
321	<	Thread.sleep(SHORT_DELAY_MS);
322	<	t.interrupt();
323	<	t.join();
324	<	} catch(Exception e){
325	<	fail("unexpected exception");
326	<	}
327	<	}
328	<
329	<	public void testTimedGet_InterruptedException2(){
330	<	final FutureTask ft = new FutureTask(new Callable(){
331	<	public Object call(){
332	<	return new Object();
333	<	}
334	<	});
335	<	Thread t = new Thread(new Runnable(){
336	<	public void run(){
337	<	try{
338	<	ft.get(100,TimeUnit.SECONDS);
339	<	fail("should throw");
340	<	} catch(InterruptedException success){}
341	<	catch(Exception e){
342	<	fail("unexpected exception");
343	<	}
344	<	}
345	<	});
346	<	try {
347	<	t.start();
348	<	Thread.sleep(SHORT_DELAY_MS);
349	<	t.interrupt();
350	<	t.join();
351	<	} catch(Exception e){
352	<	fail("unexpected exception");
353	<	}
354	<	}
355	<
356	<	public void testGet_TimeoutException(){
357	<	FutureTask ft = new FutureTask(new Callable(){
358	<	public Object call(){
359	<	return new Object();
360	<	}
361	<	});
362	<	try{
363	<	ft.get(1,TimeUnit.MILLISECONDS);
364	<	fail("should throw");
365	<	} catch(TimeoutException success){}
366	<	catch(Exception success){
367	<	fail("unexpected exception");
368	<	}
369	<
370	<
805	>	/**
806	>	* timed get with most negative timeout works correctly (i.e. no
807	>	* underflow bug)
808	>	*/
809	>	public void testGet_NegativeInfinityTimeout() throws Exception {
810	>	final ExecutorService pool = Executors.newFixedThreadPool(10);
811	>	final Runnable nop = new Runnable() { public void run() {}};
812	>	final FutureTask<Void> task = new FutureTask<>(nop, null);
813	>	final List<Future<?>> futures = new ArrayList<>();
814	>	Runnable r = new Runnable() { public void run() {
815	>	for (long timeout : new long[] { 0L, -1L, Long.MIN_VALUE }) {
816	>	try {
817	>	task.get(timeout, NANOSECONDS);
818	>	shouldThrow();
819	>	} catch (TimeoutException success) {
820	>	} catch (Throwable fail) {threadUnexpectedException(fail);}}}};
821	>	for (int i = 0; i < 10; i++)
822	>	futures.add(pool.submit(r));
823	>	try {
824	>	joinPool(pool);
825	>	for (Future<?> future : futures)
826	>	checkCompletedNormally(future, null);
827	>	} finally {
828	>	task.run();         // last resort to help terminate
829	>	}
830		}
831	<
831	>
832		}

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