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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:55 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;
35	<
36	<	public void testIsDone(){
37	<	FutureTask task = new FutureTask( new Callable() {
38	<	public Object call() { return Boolean.TRUE; } });
39	<	task.run();
40	<	assertTrue(task.isDone());
41	<	assertFalse(task.isCancelled());
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	>
102	>	try {
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	>	void checkCancelled(Future<?> f) {
111	>	checkIsDone(f);
112	>	assertTrue(f.isCancelled());
113	>
114	>	try {
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	>	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() {
34	<	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() {
43	<	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; } });
53	<	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	<	public void testCancelInterrupt(){
416	<	FutureTask task = new FutureTask( new Callable() {
417	<	public Object call() {
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	>	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");
92	<	}
93	<	return Boolean.TRUE;
94	<	} });
95	<	Thread t = new  Thread(task);
96	<	t.start();
97	<
98	<	try{
99	<	Thread.sleep(SHORT_DELAY_MS);
100	<	assertTrue(task.cancel(false));
101	<	t.join();
102	<	assertTrue(task.isDone());
103	<	assertTrue(task.isCancelled());
104	<	} catch(InterruptedException e){
105	<	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	<	public void testGet1() {
710	<	final FutureTask ft = new FutureTask(new Callable(){
711	<	public Object call(){
712	<	try{
713	<	Thread.sleep(MEDIUM_DELAY_MS);
714	<	}catch(InterruptedException e){
715	<	fail("unexpected exception");
716	<	}
717	<	return Boolean.TRUE;
718	<	}
719	<	});
720	<	Thread t = new Thread(new Runnable(){
721	<	public void run(){
722	<	try{
723	<	ft.get();
724	<	}catch(Exception e){
725	<	fail("unexpected exception");
726	<	}
727	<	}
728	<	});
729	<	try{
730	<	assertFalse(ft.isDone());
731	<	assertFalse(ft.isCancelled());
732	<	t.start();
733	<	Thread.sleep(SHORT_DELAY_MS);
734	<	ft.run();
735	<	t.join();
736	<	assertTrue(ft.isDone());
737	<	assertFalse(ft.isCancelled());
738	<	} catch(InterruptedException e){
739	<	fail("unexpected exception");
740	<
741	<	}
742	<	}
743	<
744	<	public void testTimedGet1() {
745	<	final FutureTask ft = new FutureTask(new Callable(){
746	<	public Object call(){
747	<	try{
748	<	Thread.sleep(MEDIUM_DELAY_MS);
749	<	}catch(InterruptedException e){
750	<	fail("unexpected exception");
751	<	}
752	<	return Boolean.TRUE;
753	<	}
754	<	});
755	<	Thread t = new Thread(new Runnable(){
756	<	public void run(){
757	<	try{
758	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
759	<	} catch(TimeoutException success) {
760	<	} catch(Exception e){
761	<	fail("unexpected exception");
762	<	}
763	<	}
764	<	});
765	<	try{
766	<	assertFalse(ft.isDone());
767	<	assertFalse(ft.isCancelled());
768	<	t.start();
769	<	ft.run();
770	<	t.join();
771	<	assertTrue(ft.isDone());
772	<	assertFalse(ft.isCancelled());
773	<	} catch(InterruptedException e){
774	<	fail("unexpected exception");
775	<
776	<	}
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	+	/**
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	<	public void testGet_Cancellation(){
798	<	final FutureTask ft = new FutureTask(new Callable(){
799	<	public Object call(){
800	<	try{
801	<	Thread.sleep(MEDIUM_DELAY_MS);
802	<	}catch(InterruptedException e){
186	<	fail("unexpected exception");
187	<	}
188	<	return Boolean.TRUE;
189	<	}
190	<	});
191	<	try {
192	<	Thread.sleep(SHORT_DELAY_MS);
193	<	Thread t = new Thread(new Runnable(){
194	<	public void run(){
195	<	try{
196	<	ft.get();
197	<	fail("should throw");
198	<	}catch(CancellationException success){
199	<	}
200	<	catch(Exception e){
201	<	fail("unexpected exception");
202	<	}
203	<	}
204	<	});
205	<	t.start();
206	<	ft.cancel(true);
207	<	t.join();
208	<	}catch(InterruptedException sucess){
209	<	fail("unexpected exception");
210	<	}
211	<	}
212	<
213	<	public void testGet_Cancellation2(){
214	<	final FutureTask ft = new FutureTask(new Callable(){
215	<	public Object call(){
216	<	try{
217	<	Thread.sleep(SHORT_DELAY_MS);
218	<	} catch(InterruptedException e) {
219	<	fail("unexpected exception");
220	<	}
221	<	return Boolean.TRUE;
222	<	}
223	<	});
224	<	try{
225	<	Thread.sleep(100);
226	<	Thread t = new Thread(new Runnable(){
227	<	public void run(){
228	<	try{
229	<	ft.get(3 * SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
230	<	fail("should throw");
231	<	}catch(CancellationException success) {}
232	<	catch(Exception e){
233	<	fail("unexpected exception");
234	<	}
235	<	}
236	<	});
237	<	t.start();
238	<	Thread.sleep(SHORT_DELAY_MS);
239	<	ft.cancel(true);
240	<	Thread.sleep(SHORT_DELAY_MS);
241	<	t.join();
242	<	}catch(InterruptedException ie){
243	<	fail("unexpected exception");
244	<	}
245	<	}
246	<
247	<	public void testGet_ExecutionException(){
248	<	final FutureTask ft = new FutureTask(new Callable(){
249	<	public Object call(){
250	<	int i = 5/0;
251	<	return Boolean.TRUE;
252	<	}
253	<	});
254	<	try{
255	<	ft.run();
256	<	ft.get();
257	<	fail("should throw");
258	<	}catch(ExecutionException success){
259	<	}
260	<	catch(Exception e){
261	<	fail("unexpected exception");
262	<	}
263	<	}
264	<
265	<	public void testTimedGet_ExecutionException2(){
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(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
275	<	fail("should throw");
276	<	}catch(ExecutionException success) {
277	<	}catch(TimeoutException success) { } // unlikely but OK
278	<	catch(Exception e){
279	<	fail("unexpected exception");
280	<	}
281	<	}
282	<
283	<
284	<	public void testGet_InterruptedException(){
285	<	final FutureTask ft = new FutureTask(new Callable(){
286	<	public Object call(){
287	<	return new Object();
288	<	}
289	<	});
290	<	Thread t = new Thread(new Runnable(){
291	<	public void run(){
292	<	try{
293	<	ft.get();
294	<	fail("should throw");
295	<	} catch(InterruptedException success){
296	<	} catch(Exception e){
297	<	fail("unexpected exception");
298	<	}
299	<	}
300	<	});
301	<	try {
302	<	t.start();
303	<	Thread.sleep(SHORT_DELAY_MS);
304	<	t.interrupt();
305	<	t.join();
306	<	} catch(Exception e){
307	<	fail("unexpected exception");
308	<	}
309	<	}
310	<
311	<	public void testTimedGet_InterruptedException2(){
312	<	final FutureTask ft = new FutureTask(new Callable(){
313	<	public Object call(){
314	<	return new Object();
315	<	}
316	<	});
317	<	Thread t = new Thread(new Runnable(){
318	<	public void run(){
319	<	try{
320	<	ft.get(100,TimeUnit.SECONDS);
321	<	fail("should throw");
322	<	}catch(InterruptedException success){}
323	<	catch(Exception e){
324	<	fail("unexpected exception");
325	<	}
326	<	}
327	<	});
328	<	try {
329	<	t.start();
330	<	Thread.sleep(SHORT_DELAY_MS);
331	<	t.interrupt();
332	<	t.join();
333	<	} catch(Exception e){
334	<	fail("unexpected exception");
335	<	}
336	<	}
337	<
338	<	public void testGet_TimeoutException(){
339	<	FutureTask ft = new FutureTask(new Callable(){
340	<	public Object call(){
341	<	return new Object();
342	<	}
343	<	});
344	<	try{
345	<	ft.get(1,TimeUnit.MILLISECONDS);
346	<	fail("should throw");
347	<	}catch(TimeoutException success){}
348	<	catch(Exception sucess){
349	<	fail("unexpected exception");
350	<	}
351	<
352	<
797	>	for (long timeout : timeouts) {
798	>	try {
799	>	task.get(timeout, null);
800	>	shouldThrow();
801	>	} catch (NullPointerException success) {}
802	>	}
803		}
804	<
804	>
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	>
832		}

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