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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 20:39:11 2003 UTC vs.
Revision 1.37 by jsr166, Sun Apr 21 06:54:11 2013 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.ExecutionException;
14	>	import java.util.concurrent.Future;
15	>	import java.util.concurrent.FutureTask;
16	>	import java.util.concurrent.TimeoutException;
17	>	import java.util.concurrent.atomic.AtomicInteger;
18	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
19	>	import static java.util.concurrent.TimeUnit.SECONDS;
20	>	import java.util.*;
21
22	<	public class FutureTaskTest extends TestCase {
22	>	public class FutureTaskTest extends JSR166TestCase {
23
24		public static void main(String[] args) {
25	<	junit.textui.TestRunner.run (suite());
25	>	junit.textui.TestRunner.run(suite());
26		}
27		public static Test suite() {
28	<	return new TestSuite(FutureTaskTest.class);
28	>	return new TestSuite(FutureTaskTest.class);
29		}
30
31	<	private static long SHORT_DELAY_MS = 100;
32	<	private static long MEDIUM_DELAY_MS = 1000;
33	<	private static long LONG_DELAY_MS = 10000;
34	<
35	<	public void testIsDone(){
36	<	FutureTask task = new FutureTask( new Callable() {
37	<	public Object call() { return Boolean.TRUE; } });
38	<	task.run();
39	<	assertTrue(task.isDone());
40	<	assertFalse(task.isCancelled());
31	>	void checkIsDone(Future<?> f) {
32	>	assertTrue(f.isDone());
33	>	assertFalse(f.cancel(false));
34	>	assertFalse(f.cancel(true));
35	>	if (f instanceof PublicFutureTask) {
36	>	PublicFutureTask pf = (PublicFutureTask) f;
37	>	assertEquals(1, pf.doneCount());
38	>	assertFalse(pf.runAndReset());
39	>	assertEquals(1, pf.doneCount());
40	>	Object r = null; Object exInfo = null;
41	>	try {
42	>	r = f.get();
43	>	} catch (CancellationException t) {
44	>	exInfo = CancellationException.class;
45	>	} catch (ExecutionException t) {
46	>	exInfo = t.getCause();
47	>	} catch (Throwable t) {
48	>	threadUnexpectedException(t);
49	>	}
50	>
51	>	// Check that run and runAndReset have no effect.
52	>	int savedRunCount = pf.runCount();
53	>	pf.run();
54	>	pf.runAndReset();
55	>	assertEquals(savedRunCount, pf.runCount());
56	>	try {
57	>	assertSame(r, f.get());
58	>	} catch (CancellationException t) {
59	>	assertSame(exInfo, CancellationException.class);
60	>	} catch (ExecutionException t) {
61	>	assertSame(exInfo, t.getCause());
62	>	} catch (Throwable t) {
63	>	threadUnexpectedException(t);
64	>	}
65	>	assertTrue(f.isDone());
66	>	}
67	>	}
68	>
69	>	void checkNotDone(Future<?> f) {
70	>	assertFalse(f.isDone());
71	>	assertFalse(f.isCancelled());
72	>	if (f instanceof PublicFutureTask) {
73	>	PublicFutureTask pf = (PublicFutureTask) f;
74	>	assertEquals(0, pf.doneCount());
75	>	assertEquals(0, pf.setCount());
76	>	assertEquals(0, pf.setExceptionCount());
77	>	}
78	>	}
79	>
80	>	void checkIsRunning(Future<?> f) {
81	>	checkNotDone(f);
82	>	if (f instanceof FutureTask) {
83	>	FutureTask ft = (FutureTask<?>) f;
84	>	// Check that run methods do nothing
85	>	ft.run();
86	>	if (f instanceof PublicFutureTask) {
87	>	PublicFutureTask pf = (PublicFutureTask) f;
88	>	int savedRunCount = pf.runCount();
89	>	pf.run();
90	>	assertFalse(pf.runAndReset());
91	>	assertEquals(savedRunCount, pf.runCount());
92	>	}
93	>	checkNotDone(f);
94	>	}
95		}
96
97	+	<T> void checkCompletedNormally(Future<T> f, T expected) {
98	+	checkIsDone(f);
99	+	assertFalse(f.isCancelled());
100	+
101	+	try {
102	+	assertSame(expected, f.get());
103	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
104	+	try {
105	+	assertSame(expected, f.get(5L, SECONDS));
106	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
107	+	}
108	+
109	+	void checkCancelled(Future<?> f) {
110	+	checkIsDone(f);
111	+	assertTrue(f.isCancelled());
112	+
113	+	try {
114	+	f.get();
115	+	shouldThrow();
116	+	} catch (CancellationException success) {
117	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
118	+
119	+	try {
120	+	f.get(5L, SECONDS);
121	+	shouldThrow();
122	+	} catch (CancellationException success) {
123	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
124	+	}
125	+
126	+	void tryToConfuseDoneTask(PublicFutureTask pf) {
127	+	pf.set(new Object());
128	+	pf.setException(new Error());
129	+	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
130	+	pf.cancel(true);
131	+	}
132	+	}
133	+
134	+	void checkCompletedAbnormally(Future<?> f, Throwable t) {
135	+	checkIsDone(f);
136	+	assertFalse(f.isCancelled());
137	+
138	+	try {
139	+	f.get();
140	+	shouldThrow();
141	+	} catch (ExecutionException success) {
142	+	assertSame(t, success.getCause());
143	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
144	+
145	+	try {
146	+	f.get(5L, SECONDS);
147	+	shouldThrow();
148	+	} catch (ExecutionException success) {
149	+	assertSame(t, success.getCause());
150	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
151	+	}
152	+
153	+	/**
154	+	* Subclass to expose protected methods
155	+	*/
156	+	static class PublicFutureTask extends FutureTask {
157	+	private final AtomicInteger runCount;
158	+	private final AtomicInteger doneCount = new AtomicInteger(0);
159	+	private final AtomicInteger runAndResetCount = new AtomicInteger(0);
160	+	private final AtomicInteger setCount = new AtomicInteger(0);
161	+	private final AtomicInteger setExceptionCount = new AtomicInteger(0);
162	+	public int runCount() { return runCount.get(); }
163	+	public int doneCount() { return doneCount.get(); }
164	+	public int runAndResetCount() { return runAndResetCount.get(); }
165	+	public int setCount() { return setCount.get(); }
166	+	public int setExceptionCount() { return setExceptionCount.get(); }
167	+
168	+	PublicFutureTask(Runnable runnable) {
169	+	this(runnable, seven);
170	+	}
171	+	PublicFutureTask(Runnable runnable, Object result) {
172	+	this(runnable, result, new AtomicInteger(0));
173	+	}
174	+	private PublicFutureTask(final Runnable runnable, Object result,
175	+	final AtomicInteger runCount) {
176	+	super(new Runnable() {
177	+	public void run() {
178	+	runCount.getAndIncrement();
179	+	runnable.run();
180	+	}}, result);
181	+	this.runCount = runCount;
182	+	}
183	+	PublicFutureTask(Callable callable) {
184	+	this(callable, new AtomicInteger(0));
185	+	}
186	+	private PublicFutureTask(final Callable callable,
187	+	final AtomicInteger runCount) {
188	+	super(new Callable() {
189	+	public Object call() throws Exception {
190	+	runCount.getAndIncrement();
191	+	return callable.call();
192	+	}});
193	+	this.runCount = runCount;
194	+	}
195	+	@Override public void done() {
196	+	assertTrue(isDone());
197	+	doneCount.incrementAndGet();
198	+	super.done();
199	+	}
200	+	@Override public boolean runAndReset() {
201	+	runAndResetCount.incrementAndGet();
202	+	return super.runAndReset();
203	+	}
204	+	@Override public void set(Object x) {
205	+	setCount.incrementAndGet();
206	+	super.set(x);
207	+	}
208	+	@Override public void setException(Throwable t) {
209	+	setExceptionCount.incrementAndGet();
210	+	super.setException(t);
211	+	}
212	+	}
213	+
214	+	class Counter extends CheckedRunnable {
215	+	final AtomicInteger count = new AtomicInteger(0);
216	+	public int get() { return count.get(); }
217	+	public void realRun() {
218	+	count.getAndIncrement();
219	+	}
220	+	}
221	+
222	+	/**
223	+	* creating a future with a null callable throws NullPointerException
224	+	*/
225	+	public void testConstructor() {
226	+	try {
227	+	new FutureTask(null);
228	+	shouldThrow();
229	+	} catch (NullPointerException success) {}
230	+	}
231	+
232	+	/**
233	+	* creating a future with null runnable throws NullPointerException
234	+	*/
235	+	public void testConstructor2() {
236	+	try {
237	+	new FutureTask(null, Boolean.TRUE);
238	+	shouldThrow();
239	+	} catch (NullPointerException success) {}
240	+	}
241	+
242	+	/**
243	+	* isDone is true when a task completes
244	+	*/
245	+	public void testIsDone() {
246	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
247	+	assertFalse(task.isDone());
248	+	task.run();
249	+	assertTrue(task.isDone());
250	+	checkCompletedNormally(task, Boolean.TRUE);
251	+	assertEquals(1, task.runCount());
252	+	}
253	+
254	+	/**
255	+	* runAndReset of a non-cancelled task succeeds
256	+	*/
257	+	public void testRunAndReset() {
258	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
259	+	for (int i = 0; i < 3; i++) {
260	+	assertTrue(task.runAndReset());
261	+	checkNotDone(task);
262	+	assertEquals(i+1, task.runCount());
263	+	assertEquals(i+1, task.runAndResetCount());
264	+	assertEquals(0, task.setCount());
265	+	assertEquals(0, task.setExceptionCount());
266	+	}
267	+	}
268	+
269	+	/**
270	+	* runAndReset after cancellation fails
271	+	*/
272	+	public void testRunAndResetAfterCancel() {
273	+	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
274	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
275	+	assertTrue(task.cancel(mayInterruptIfRunning));
276	+	for (int i = 0; i < 3; i++) {
277	+	assertFalse(task.runAndReset());
278	+	assertEquals(0, task.runCount());
279	+	assertEquals(i+1, task.runAndResetCount());
280	+	assertEquals(0, task.setCount());
281	+	assertEquals(0, task.setExceptionCount());
282	+	}
283	+	tryToConfuseDoneTask(task);
284	+	checkCancelled(task);
285	+	}
286	+	}
287	+
288	+	/**
289	+	* setting value causes get to return it
290	+	*/
291	+	public void testSet() throws Exception {
292	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
293	+	task.set(one);
294	+	for (int i = 0; i < 3; i++) {
295	+	assertSame(one, task.get());
296	+	assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS));
297	+	assertEquals(1, task.setCount());
298	+	}
299	+	tryToConfuseDoneTask(task);
300	+	checkCompletedNormally(task, one);
301	+	assertEquals(0, task.runCount());
302	+	}
303	+
304	+	/**
305	+	* setException causes get to throw ExecutionException
306	+	*/
307	+	public void testSetException_get() throws Exception {
308	+	Exception nse = new NoSuchElementException();
309	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
310	+	task.setException(nse);
311	+
312	+	try {
313	+	task.get();
314	+	shouldThrow();
315	+	} catch (ExecutionException success) {
316	+	assertSame(nse, success.getCause());
317	+	checkCompletedAbnormally(task, nse);
318	+	}
319	+
320	+	try {
321	+	task.get(LONG_DELAY_MS, MILLISECONDS);
322	+	shouldThrow();
323	+	} catch (ExecutionException success) {
324	+	assertSame(nse, success.getCause());
325	+	checkCompletedAbnormally(task, nse);
326	+	}
327	+
328	+	assertEquals(1, task.setExceptionCount());
329	+	assertEquals(0, task.setCount());
330	+	tryToConfuseDoneTask(task);
331	+	checkCompletedAbnormally(task, nse);
332	+	assertEquals(0, task.runCount());
333	+	}
334	+
335	+	/**
336	+	* cancel(false) before run succeeds
337	+	*/
338		public void testCancelBeforeRun() {
339	<	FutureTask task = new FutureTask( new Callable() {
34	<	public Object call() { return Boolean.TRUE; } });
339	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
340		assertTrue(task.cancel(false));
341	<	task.run();
342	<	assertTrue(task.isDone());
343	<	assertTrue(task.isCancelled());
341	>	task.run();
342	>	assertEquals(0, task.runCount());
343	>	assertEquals(0, task.setCount());
344	>	assertEquals(0, task.setExceptionCount());
345	>	assertTrue(task.isCancelled());
346	>	assertTrue(task.isDone());
347	>	tryToConfuseDoneTask(task);
348	>	assertEquals(0, task.runCount());
349	>	checkCancelled(task);
350		}
351
352	+	/**
353	+	* cancel(true) before run succeeds
354	+	*/
355		public void testCancelBeforeRun2() {
356	<	FutureTask task = new FutureTask( new Callable() {
43	<	public Object call() { return Boolean.TRUE; } });
356	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
357		assertTrue(task.cancel(true));
358	<	task.run();
359	<	assertTrue(task.isDone());
360	<	assertTrue(task.isCancelled());
358	>	task.run();
359	>	assertEquals(0, task.runCount());
360	>	assertEquals(0, task.setCount());
361	>	assertEquals(0, task.setExceptionCount());
362	>	assertTrue(task.isCancelled());
363	>	assertTrue(task.isDone());
364	>	tryToConfuseDoneTask(task);
365	>	assertEquals(0, task.runCount());
366	>	checkCancelled(task);
367		}
368
369	+	/**
370	+	* cancel(false) of a completed task fails
371	+	*/
372		public void testCancelAfterRun() {
373	<	FutureTask task = new FutureTask( new Callable() {
374	<	public Object call() { return Boolean.TRUE; } });
53	<	task.run();
373	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
374	>	task.run();
375		assertFalse(task.cancel(false));
376	<	assertTrue(task.isDone());
377	<	assertFalse(task.isCancelled());
378	<	}
376	>	assertEquals(1, task.runCount());
377	>	assertEquals(1, task.setCount());
378	>	assertEquals(0, task.setExceptionCount());
379	>	tryToConfuseDoneTask(task);
380	>	checkCompletedNormally(task, Boolean.TRUE);
381	>	assertEquals(1, task.runCount());
382	>	}
383	>
384	>	/**
385	>	* cancel(true) of a completed task fails
386	>	*/
387	>	public void testCancelAfterRun2() {
388	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
389	>	task.run();
390	>	assertFalse(task.cancel(true));
391	>	assertEquals(1, task.runCount());
392	>	assertEquals(1, task.setCount());
393	>	assertEquals(0, task.setExceptionCount());
394	>	tryToConfuseDoneTask(task);
395	>	checkCompletedNormally(task, Boolean.TRUE);
396	>	assertEquals(1, task.runCount());
397	>	}
398	>
399	>	/**
400	>	* cancel(true) interrupts a running task that subsequently succeeds
401	>	*/
402	>	public void testCancelInterrupt() {
403	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
404	>	final PublicFutureTask task =
405	>	new PublicFutureTask(new CheckedRunnable() {
406	>	public void realRun() {
407	>	pleaseCancel.countDown();
408	>	try {
409	>	delay(LONG_DELAY_MS);
410	>	shouldThrow();
411	>	} catch (InterruptedException success) {}
412	>	}});
413	>
414	>	Thread t = newStartedThread(task);
415	>	await(pleaseCancel);
416	>	assertTrue(task.cancel(true));
417	>	assertTrue(task.isCancelled());
418	>	assertTrue(task.isDone());
419	>	awaitTermination(t);
420	>	assertEquals(1, task.runCount());
421	>	assertEquals(1, task.setCount());
422	>	assertEquals(0, task.setExceptionCount());
423	>	tryToConfuseDoneTask(task);
424	>	checkCancelled(task);
425	>	}
426	>
427	>	/**
428	>	* cancel(true) tries to interrupt a running task, but
429	>	* Thread.interrupt throws (simulating a restrictive security
430	>	* manager)
431	>	*/
432	>	public void testCancelInterrupt_ThrowsSecurityException() {
433	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
434	>	final CountDownLatch cancelled = new CountDownLatch(1);
435	>	final PublicFutureTask task =
436	>	new PublicFutureTask(new CheckedRunnable() {
437	>	public void realRun() {
438	>	pleaseCancel.countDown();
439	>	await(cancelled);
440	>	assertFalse(Thread.interrupted());
441	>	}});
442	>
443	>	final Thread t = new Thread(task) {
444	>	// Simulate a restrictive security manager.
445	>	@Override public void interrupt() {
446	>	throw new SecurityException();
447	>	}};
448	>	t.setDaemon(true);
449	>	t.start();
450
451	<	public void testCancelInterrupt(){
452	<	FutureTask task = new FutureTask( new Callable() {
453	<	public Object call() {
451	>	await(pleaseCancel);
452	>	try {
453	>	task.cancel(true);
454	>	shouldThrow();
455	>	} catch (SecurityException expected) {}
456	>
457	>	// We failed to deliver the interrupt, but the world retains
458	>	// its sanity, as if we had done task.cancel(false)
459	>	assertTrue(task.isCancelled());
460	>	assertTrue(task.isDone());
461	>	assertEquals(1, task.runCount());
462	>	assertEquals(1, task.doneCount());
463	>	assertEquals(0, task.setCount());
464	>	assertEquals(0, task.setExceptionCount());
465	>	cancelled.countDown();
466	>	awaitTermination(t);
467	>	assertEquals(1, task.setCount());
468	>	assertEquals(0, task.setExceptionCount());
469	>	tryToConfuseDoneTask(task);
470	>	checkCancelled(task);
471	>	}
472	>
473	>	/**
474	>	* cancel(true) interrupts a running task that subsequently throws
475	>	*/
476	>	public void testCancelInterrupt_taskFails() {
477	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
478	>	final PublicFutureTask task =
479	>	new PublicFutureTask(new Runnable() {
480	>	public void run() {
481		try {
482	<	Thread.sleep(SHORT_DELAY_MS* 2);
483	<	fail("should throw");
482	>	pleaseCancel.countDown();
483	>	delay(LONG_DELAY_MS);
484	>	shouldThrow();
485	>	} catch (Throwable t) {
486	>	assertTrue(t instanceof InterruptedException);
487		}
488	<	catch (InterruptedException success) {}
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	<	public void testGet_Cancellation(){
796	<	final FutureTask ft = new FutureTask(new Callable(){
797	<	public Object call(){
798	<	try{
799	<	Thread.sleep(MEDIUM_DELAY_MS);
800	<	} catch(InterruptedException e){
801	<	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 success){
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");
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
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 success){
349	–	fail("unexpected exception");
350	–	}
351	–
352	–
353	–	}
354	–
805		}

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