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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 1.31 by jsr166, Sat Dec 15 21:50:30 2012 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	>
41	>	// Check that run and runAndReset have no effect.
42	>	int savedRunCount = pf.runCount();
43	>	int savedSetCount = pf.setCount();
44	>	int savedSetExceptionCount = pf.setExceptionCount();
45	>	pf.run();
46	>	pf.runAndReset();
47	>	assertEquals(savedRunCount, pf.runCount());
48	>	assertEquals(savedSetCount, pf.setCount());
49	>	assertEquals(savedSetExceptionCount, pf.setExceptionCount());
50	>	assertTrue(f.isDone());
51	>	}
52	>	}
53	>
54	>	void checkNotDone(Future<?> f) {
55	>	assertFalse(f.isDone());
56	>	assertFalse(f.isCancelled());
57	>	if (f instanceof PublicFutureTask) {
58	>	PublicFutureTask pf = (PublicFutureTask) f;
59	>	assertEquals(0, pf.doneCount());
60	>	assertEquals(0, pf.setCount());
61	>	assertEquals(0, pf.setExceptionCount());
62	>	}
63	>	}
64	>
65	>	void checkIsRunning(Future<?> f) {
66	>	checkNotDone(f);
67	>	if (f instanceof FutureTask) {
68	>	FutureTask ft = (FutureTask<?>) f;
69	>	// Check that run methods do nothing
70	>	ft.run();
71	>	if (f instanceof PublicFutureTask)
72	>	assertFalse(((PublicFutureTask) f).runAndReset());
73	>	checkNotDone(f);
74	>	}
75	>	}
76	>
77	>	<T> void checkCompletedNormally(Future<T> f, T expected) {
78	>	checkIsDone(f);
79	>	assertFalse(f.isCancelled());
80	>
81	>	try {
82	>	assertSame(expected, f.get());
83	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
84	>	try {
85	>	assertSame(expected, f.get(5L, SECONDS));
86	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
87		}
88
89	+	void checkCancelled(Future<?> f) {
90	+	checkIsDone(f);
91	+	assertTrue(f.isCancelled());
92	+
93	+	try {
94	+	f.get();
95	+	shouldThrow();
96	+	} catch (CancellationException success) {
97	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
98	+
99	+	try {
100	+	f.get(5L, SECONDS);
101	+	shouldThrow();
102	+	} catch (CancellationException success) {
103	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
104	+	}
105	+
106	+	void tryToConfuseDoneTask(PublicFutureTask pf) {
107	+	pf.set(new Object());
108	+	pf.setException(new Error());
109	+	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
110	+	pf.cancel(true);
111	+	}
112	+	}
113	+
114	+	void checkCompletedAbnormally(Future<?> f, Throwable t) {
115	+	checkIsDone(f);
116	+	assertFalse(f.isCancelled());
117	+
118	+	try {
119	+	f.get();
120	+	shouldThrow();
121	+	} catch (ExecutionException success) {
122	+	assertSame(t, success.getCause());
123	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
124	+
125	+	try {
126	+	f.get(5L, SECONDS);
127	+	shouldThrow();
128	+	} catch (ExecutionException success) {
129	+	assertSame(t, success.getCause());
130	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
131	+	}
132	+
133	+	/**
134	+	* Subclass to expose protected methods
135	+	*/
136	+	static class PublicFutureTask extends FutureTask {
137	+	private final AtomicInteger runCount;
138	+	private final AtomicInteger doneCount = new AtomicInteger(0);
139	+	private final AtomicInteger runAndResetCount = new AtomicInteger(0);
140	+	private final AtomicInteger setCount = new AtomicInteger(0);
141	+	private final AtomicInteger setExceptionCount = new AtomicInteger(0);
142	+	public int runCount() { return runCount.get(); }
143	+	public int doneCount() { return doneCount.get(); }
144	+	public int runAndResetCount() { return runAndResetCount.get(); }
145	+	public int setCount() { return setCount.get(); }
146	+	public int setExceptionCount() { return setExceptionCount.get(); }
147	+
148	+	PublicFutureTask(Runnable runnable) {
149	+	this(runnable, seven);
150	+	}
151	+	PublicFutureTask(Runnable runnable, Object result) {
152	+	this(runnable, result, new AtomicInteger(0));
153	+	}
154	+	private PublicFutureTask(final Runnable runnable, Object result,
155	+	final AtomicInteger runCount) {
156	+	super(new Runnable() {
157	+	public void run() {
158	+	runCount.getAndIncrement();
159	+	runnable.run();
160	+	}}, result);
161	+	this.runCount = runCount;
162	+	}
163	+	PublicFutureTask(Callable callable) {
164	+	this(callable, new AtomicInteger(0));
165	+	}
166	+	private PublicFutureTask(final Callable callable,
167	+	final AtomicInteger runCount) {
168	+	super(new Callable() {
169	+	public Object call() throws Exception {
170	+	runCount.getAndIncrement();
171	+	return callable.call();
172	+	}});
173	+	this.runCount = runCount;
174	+	}
175	+	@Override public void done() {
176	+	assertTrue(isDone());
177	+	doneCount.incrementAndGet();
178	+	super.done();
179	+	}
180	+	@Override public boolean runAndReset() {
181	+	runAndResetCount.incrementAndGet();
182	+	return super.runAndReset();
183	+	}
184	+	@Override public void set(Object x) {
185	+	setCount.incrementAndGet();
186	+	super.set(x);
187	+	}
188	+	@Override public void setException(Throwable t) {
189	+	setExceptionCount.incrementAndGet();
190	+	super.setException(t);
191	+	}
192	+	}
193	+
194	+	class Counter extends CheckedRunnable {
195	+	final AtomicInteger count = new AtomicInteger(0);
196	+	public int get() { return count.get(); }
197	+	public void realRun() {
198	+	count.getAndIncrement();
199	+	}
200	+	}
201	+
202	+	/**
203	+	* creating a future with a null callable throws NullPointerException
204	+	*/
205	+	public void testConstructor() {
206	+	try {
207	+	new FutureTask(null);
208	+	shouldThrow();
209	+	} catch (NullPointerException success) {}
210	+	}
211	+
212	+	/**
213	+	* creating a future with null runnable throws NullPointerException
214	+	*/
215	+	public void testConstructor2() {
216	+	try {
217	+	new FutureTask(null, Boolean.TRUE);
218	+	shouldThrow();
219	+	} catch (NullPointerException success) {}
220	+	}
221	+
222	+	/**
223	+	* isDone is true when a task completes
224	+	*/
225	+	public void testIsDone() {
226	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
227	+	assertFalse(task.isDone());
228	+	task.run();
229	+	assertTrue(task.isDone());
230	+	checkCompletedNormally(task, Boolean.TRUE);
231	+	assertEquals(1, task.runCount());
232	+	}
233	+
234	+	/**
235	+	* runAndReset of a non-cancelled task succeeds
236	+	*/
237	+	public void testRunAndReset() {
238	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
239	+	for (int i = 0; i < 3; i++) {
240	+	assertTrue(task.runAndReset());
241	+	checkNotDone(task);
242	+	assertEquals(i+1, task.runCount());
243	+	assertEquals(i+1, task.runAndResetCount());
244	+	assertEquals(0, task.setCount());
245	+	assertEquals(0, task.setExceptionCount());
246	+	}
247	+	}
248	+
249	+	/**
250	+	* runAndReset after cancellation fails
251	+	*/
252	+	public void testRunAndResetAfterCancel() {
253	+	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
254	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
255	+	assertTrue(task.cancel(mayInterruptIfRunning));
256	+	for (int i = 0; i < 3; i++) {
257	+	assertFalse(task.runAndReset());
258	+	assertEquals(0, task.runCount());
259	+	assertEquals(i+1, task.runAndResetCount());
260	+	assertEquals(0, task.setCount());
261	+	assertEquals(0, task.setExceptionCount());
262	+	}
263	+	tryToConfuseDoneTask(task);
264	+	checkCancelled(task);
265	+	}
266	+	}
267	+
268	+	/**
269	+	* setting value causes get to return it
270	+	*/
271	+	public void testSet() throws Exception {
272	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
273	+	task.set(one);
274	+	for (int i = 0; i < 3; i++) {
275	+	assertSame(one, task.get());
276	+	assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS));
277	+	assertEquals(1, task.setCount());
278	+	}
279	+	tryToConfuseDoneTask(task);
280	+	checkCompletedNormally(task, one);
281	+	assertEquals(0, task.runCount());
282	+	}
283	+
284	+	/**
285	+	* setException causes get to throw ExecutionException
286	+	*/
287	+	public void testSetException_get() throws Exception {
288	+	Exception nse = new NoSuchElementException();
289	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
290	+	task.setException(nse);
291	+
292	+	try {
293	+	task.get();
294	+	shouldThrow();
295	+	} catch (ExecutionException success) {
296	+	assertSame(nse, success.getCause());
297	+	checkCompletedAbnormally(task, nse);
298	+	}
299	+
300	+	try {
301	+	task.get(LONG_DELAY_MS, MILLISECONDS);
302	+	shouldThrow();
303	+	} catch (ExecutionException success) {
304	+	assertSame(nse, success.getCause());
305	+	checkCompletedAbnormally(task, nse);
306	+	}
307	+
308	+	assertEquals(1, task.setExceptionCount());
309	+	assertEquals(0, task.setCount());
310	+	tryToConfuseDoneTask(task);
311	+	checkCompletedAbnormally(task, nse);
312	+	assertEquals(0, task.runCount());
313	+	}
314	+
315	+	/**
316	+	* cancel(false) before run succeeds
317	+	*/
318		public void testCancelBeforeRun() {
319	<	FutureTask task = new FutureTask( new Callable() {
34	<	public Object call() { return Boolean.TRUE; } });
319	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
320		assertTrue(task.cancel(false));
321	<	task.run();
322	<	assertTrue(task.isDone());
323	<	assertTrue(task.isCancelled());
321	>	task.run();
322	>	assertEquals(0, task.setCount());
323	>	assertEquals(0, task.setExceptionCount());
324	>	tryToConfuseDoneTask(task);
325	>	checkCancelled(task);
326	>	assertEquals(0, task.runCount());
327		}
328
329	+	/**
330	+	* cancel(true) before run succeeds
331	+	*/
332		public void testCancelBeforeRun2() {
333	<	FutureTask task = new FutureTask( new Callable() {
43	<	public Object call() { return Boolean.TRUE; } });
333	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
334		assertTrue(task.cancel(true));
335	<	task.run();
336	<	assertTrue(task.isDone());
337	<	assertTrue(task.isCancelled());
335	>	task.run();
336	>	assertEquals(0, task.setCount());
337	>	assertEquals(0, task.setExceptionCount());
338	>	tryToConfuseDoneTask(task);
339	>	checkCancelled(task);
340	>	assertEquals(0, task.runCount());
341		}
342
343	+	/**
344	+	* cancel(false) of a completed task fails
345	+	*/
346		public void testCancelAfterRun() {
347	<	FutureTask task = new FutureTask( new Callable() {
348	<	public Object call() { return Boolean.TRUE; } });
53	<	task.run();
347	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
348	>	task.run();
349		assertFalse(task.cancel(false));
350	<	assertTrue(task.isDone());
351	<	assertFalse(task.isCancelled());
352	<	}
350	>	assertEquals(1, task.setCount());
351	>	assertEquals(0, task.setExceptionCount());
352	>	tryToConfuseDoneTask(task);
353	>	checkCompletedNormally(task, Boolean.TRUE);
354	>	assertEquals(1, task.runCount());
355	>	}
356	>
357	>	/**
358	>	* cancel(true) of a completed task fails
359	>	*/
360	>	public void testCancelAfterRun2() {
361	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
362	>	task.run();
363	>	assertFalse(task.cancel(true));
364	>	assertEquals(1, task.setCount());
365	>	assertEquals(0, task.setExceptionCount());
366	>	tryToConfuseDoneTask(task);
367	>	checkCompletedNormally(task, Boolean.TRUE);
368	>	assertEquals(1, task.runCount());
369	>	}
370	>
371	>	/**
372	>	* cancel(true) interrupts a running task that subsequently succeeds
373	>	*/
374	>	public void testCancelInterrupt() {
375	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
376	>	final PublicFutureTask task =
377	>	new PublicFutureTask(new CheckedRunnable() {
378	>	public void realRun() {
379	>	pleaseCancel.countDown();
380	>	try {
381	>	delay(LONG_DELAY_MS);
382	>	shouldThrow();
383	>	} catch (InterruptedException success) {}
384	>	}});
385
386	<	public void testCancelInterrupt(){
387	<	FutureTask task = new FutureTask( new Callable() {
388	<	public Object call() {
386	>	Thread t = newStartedThread(task);
387	>	await(pleaseCancel);
388	>	assertTrue(task.cancel(true));
389	>	assertTrue(task.isCancelled());
390	>	awaitTermination(t);
391	>	assertEquals(1, task.runCount());
392	>	assertEquals(1, task.setCount());
393	>	assertEquals(0, task.setExceptionCount());
394	>	tryToConfuseDoneTask(task);
395	>	checkCancelled(task);
396	>	}
397	>
398	>	/**
399	>	* cancel(true) interrupts a running task that subsequently throws
400	>	*/
401	>	public void testCancelInterrupt_taskFails() {
402	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
403	>	final PublicFutureTask task =
404	>	new PublicFutureTask(new Runnable() {
405	>	public void run() {
406		try {
407	<	Thread.sleep(SHORT_DELAY_MS* 2);
408	<	fail("should throw");
409	<	}
410	<	catch (InterruptedException success) {}
407	>	pleaseCancel.countDown();
408	>	delay(LONG_DELAY_MS);
409	>	} finally { throw new RuntimeException(); }
410	>	}});
411	>
412	>	Thread t = newStartedThread(task);
413	>	await(pleaseCancel);
414	>	assertTrue(task.cancel(true));
415	>	assertTrue(task.isCancelled());
416	>	awaitTermination(t);
417	>	assertEquals(1, task.runCount());
418	>	assertEquals(0, task.setCount());
419	>	assertEquals(1, task.setExceptionCount());
420	>	tryToConfuseDoneTask(task);
421	>	checkCancelled(task);
422	>	}
423	>
424	>	/**
425	>	* cancel(false) does not interrupt a running task
426	>	*/
427	>	public void testCancelNoInterrupt() {
428	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
429	>	final CountDownLatch cancelled = new CountDownLatch(1);
430	>	final PublicFutureTask task =
431	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
432	>	public Boolean realCall() {
433	>	pleaseCancel.countDown();
434	>	await(cancelled);
435	>	assertFalse(Thread.interrupted());
436		return Boolean.TRUE;
437	<	} });
438	<	Thread t = new  Thread(task);
439	<	t.start();
440	<
441	<	try{
442	<	Thread.sleep(SHORT_DELAY_MS);
443	<	assertTrue(task.cancel(true));
444	<	t.join();
445	<	assertTrue(task.isDone());
446	<	assertTrue(task.isCancelled());
447	<	} catch(InterruptedException e){
448	<	fail("unexpected exception");
437	>	}});
438	>
439	>	Thread t = newStartedThread(task);
440	>	await(pleaseCancel);
441	>	assertTrue(task.cancel(false));
442	>	assertTrue(task.isCancelled());
443	>	cancelled.countDown();
444	>	awaitTermination(t);
445	>	assertEquals(1, task.runCount());
446	>	assertEquals(1, task.setCount());
447	>	assertEquals(0, task.setExceptionCount());
448	>	tryToConfuseDoneTask(task);
449	>	checkCancelled(task);
450	>	}
451	>
452	>	/**
453	>	* run in one thread causes get in another thread to retrieve value
454	>	*/
455	>	public void testGetRun() {
456	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
457	>
458	>	final PublicFutureTask task =
459	>	new PublicFutureTask(new CheckedCallable<Object>() {
460	>	public Object realCall() {
461	>	return two;
462	>	}});
463	>
464	>	Thread t1 = newStartedThread(new CheckedRunnable() {
465	>	public void realRun() throws Exception {
466	>	pleaseRun.countDown();
467	>	assertSame(two, task.get());
468	>	}});
469	>
470	>	Thread t2 = newStartedThread(new CheckedRunnable() {
471	>	public void realRun() throws Exception {
472	>	pleaseRun.countDown();
473	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
474	>	}});
475	>
476	>	await(pleaseRun);
477	>	checkNotDone(task);
478	>	assertTrue(t1.isAlive());
479	>	assertTrue(t2.isAlive());
480	>	task.run();
481	>	checkCompletedNormally(task, two);
482	>	assertEquals(1, task.runCount());
483	>	assertEquals(1, task.setCount());
484	>	assertEquals(0, task.setExceptionCount());
485	>	awaitTermination(t1);
486	>	awaitTermination(t2);
487	>	tryToConfuseDoneTask(task);
488	>	checkCompletedNormally(task, two);
489	>	}
490	>
491	>	/**
492	>	* set in one thread causes get in another thread to retrieve value
493	>	*/
494	>	public void testGetSet() {
495	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
496	>
497	>	final PublicFutureTask task =
498	>	new PublicFutureTask(new CheckedCallable<Object>() {
499	>	public Object realCall() throws InterruptedException {
500	>	return two;
501	>	}});
502	>
503	>	Thread t1 = newStartedThread(new CheckedRunnable() {
504	>	public void realRun() throws Exception {
505	>	pleaseSet.countDown();
506	>	assertSame(two, task.get());
507	>	}});
508	>
509	>	Thread t2 = newStartedThread(new CheckedRunnable() {
510	>	public void realRun() throws Exception {
511	>	pleaseSet.countDown();
512	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
513	>	}});
514	>
515	>	await(pleaseSet);
516	>	checkNotDone(task);
517	>	assertTrue(t1.isAlive());
518	>	assertTrue(t2.isAlive());
519	>	task.set(two);
520	>	assertEquals(0, task.runCount());
521	>	assertEquals(1, task.setCount());
522	>	assertEquals(0, task.setExceptionCount());
523	>	tryToConfuseDoneTask(task);
524	>	checkCompletedNormally(task, two);
525	>	awaitTermination(t1);
526	>	awaitTermination(t2);
527	>	}
528	>
529	>	/**
530	>	* Cancelling a task causes timed get in another thread to throw
531	>	* CancellationException
532	>	*/
533	>	public void testTimedGet_Cancellation() {
534	>	for (final boolean mayInterruptIfRunning :
535	>	new boolean[] { true, false }) {
536	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
537	>	final CountDownLatch cancelled = new CountDownLatch(1);
538	>	final PublicFutureTask task =
539	>	new PublicFutureTask(new CheckedCallable<Object>() {
540	>	public Object realCall() throws InterruptedException {
541	>	pleaseCancel.countDown();
542	>	if (mayInterruptIfRunning) {
543	>	try {
544	>	delay(2*LONG_DELAY_MS);
545	>	} catch (InterruptedException success) {}
546	>	} else {
547	>	await(cancelled);
548	>	}
549	>	return two;
550	>	}});
551	>
552	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
553	>	public void realRun() throws Exception {
554	>	pleaseCancel.countDown();
555	>	task.get();
556	>	}};
557	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
558	>	public void realRun() throws Exception {
559	>	pleaseCancel.countDown();
560	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
561	>	}};
562	>	t1.start();
563	>	t2.start();
564	>	Thread t3 = newStartedThread(task);
565	>	await(pleaseCancel);
566	>	checkIsRunning(task);
567	>	task.cancel(mayInterruptIfRunning);
568	>	checkCancelled(task);
569	>	awaitTermination(t1);
570	>	awaitTermination(t2);
571	>	cancelled.countDown();
572	>	awaitTermination(t3);
573	>	assertEquals(1, task.runCount());
574	>	assertEquals(1, task.setCount());
575	>	assertEquals(0, task.setExceptionCount());
576	>	tryToConfuseDoneTask(task);
577	>	checkCancelled(task);
578		}
579		}
580
581	+	/**
582	+	* A runtime exception in task causes get to throw ExecutionException
583	+	*/
584	+	public void testGet_ExecutionException() throws InterruptedException {
585	+	final ArithmeticException e = new ArithmeticException();
586	+	final PublicFutureTask task = new PublicFutureTask(new Callable() {
587	+	public Object call() {
588	+	throw e;
589	+	}});
590	+
591	+	task.run();
592	+	assertEquals(1, task.runCount());
593	+	assertEquals(0, task.setCount());
594	+	assertEquals(1, task.setExceptionCount());
595	+	try {
596	+	task.get();
597	+	shouldThrow();
598	+	} catch (ExecutionException success) {
599	+	assertSame(e, success.getCause());
600	+	tryToConfuseDoneTask(task);
601	+	checkCompletedAbnormally(task, success.getCause());
602	+	}
603	+	}
604
605	<	public void testCancelNoInterrupt(){
606	<	FutureTask task = new FutureTask( new Callable() {
607	<	public Object call() {
608	<	try {
609	<	Thread.sleep(SHORT_DELAY_MS* 2);
610	<	}
611	<	catch (InterruptedException success) {
612	<	fail("should not interrupt");
613	<	}
614	<	return Boolean.TRUE;
615	<	} });
616	<	Thread t = new  Thread(task);
617	<	t.start();
618	<
619	<	try{
620	<	Thread.sleep(SHORT_DELAY_MS);
621	<	assertTrue(task.cancel(false));
622	<	t.join();
102	<	assertTrue(task.isDone());
103	<	assertTrue(task.isCancelled());
104	<	} catch(InterruptedException e){
105	<	fail("unexpected exception");
605	>	/**
606	>	* A runtime exception in task causes timed get to throw ExecutionException
607	>	*/
608	>	public void testTimedGet_ExecutionException2() throws Exception {
609	>	final ArithmeticException e = new ArithmeticException();
610	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
611	>	public Object call() {
612	>	throw e;
613	>	}});
614	>
615	>	task.run();
616	>	try {
617	>	task.get(LONG_DELAY_MS, MILLISECONDS);
618	>	shouldThrow();
619	>	} catch (ExecutionException success) {
620	>	assertSame(e, success.getCause());
621	>	tryToConfuseDoneTask(task);
622	>	checkCompletedAbnormally(task, success.getCause());
623		}
624		}
625
626	<	public void testGet1() {
627	<	final FutureTask ft = new FutureTask(new Callable(){
628	<	public Object call(){
629	<	try{
630	<	Thread.sleep(MEDIUM_DELAY_MS);
631	<	} catch(InterruptedException e){
632	<	fail("unexpected exception");
633	<	}
634	<	return Boolean.TRUE;
635	<	}
636	<	});
637	<	Thread t = new Thread(new Runnable(){
638	<	public void run(){
639	<	try{
640	<	ft.get();
641	<	} catch(Exception e){
642	<	fail("unexpected exception");
643	<	}
644	<	}
645	<	});
646	<	try{
647	<	assertFalse(ft.isDone());
648	<	assertFalse(ft.isCancelled());
649	<	t.start();
650	<	Thread.sleep(SHORT_DELAY_MS);
651	<	ft.run();
652	<	t.join();
653	<	assertTrue(ft.isDone());
654	<	assertFalse(ft.isCancelled());
655	<	} catch(InterruptedException e){
656	<	fail("unexpected exception");
657	<
658	<	}
659	<	}
660	<
661	<	public void testTimedGet1() {
662	<	final FutureTask ft = new FutureTask(new Callable(){
663	<	public Object call(){
664	<	try{
665	<	Thread.sleep(MEDIUM_DELAY_MS);
666	<	} catch(InterruptedException e){
667	<	fail("unexpected exception");
668	<	}
669	<	return Boolean.TRUE;
670	<	}
671	<	});
672	<	Thread t = new Thread(new Runnable(){
673	<	public void run(){
674	<	try{
675	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
676	<	} catch(TimeoutException success) {
677	<	} catch(Exception e){
678	<	fail("unexpected exception");
679	<	}
680	<	}
681	<	});
682	<	try{
683	<	assertFalse(ft.isDone());
684	<	assertFalse(ft.isCancelled());
685	<	t.start();
686	<	ft.run();
687	<	t.join();
688	<	assertTrue(ft.isDone());
689	<	assertFalse(ft.isCancelled());
690	<	} catch(InterruptedException e){
691	<	fail("unexpected exception");
692	<
693	<	}
626	>	/**
627	>	* get is interruptible
628	>	*/
629	>	public void testGet_interruptible() {
630	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
631	>	final FutureTask task = new FutureTask(new NoOpCallable());
632	>	Thread t = newStartedThread(new CheckedRunnable() {
633	>	public void realRun() throws Exception {
634	>	Thread.currentThread().interrupt();
635	>	try {
636	>	task.get();
637	>	shouldThrow();
638	>	} catch (InterruptedException success) {}
639	>	assertFalse(Thread.interrupted());
640	>
641	>	pleaseInterrupt.countDown();
642	>	try {
643	>	task.get();
644	>	shouldThrow();
645	>	} catch (InterruptedException success) {}
646	>	assertFalse(Thread.interrupted());
647	>	}});
648	>
649	>	await(pleaseInterrupt);
650	>	t.interrupt();
651	>	awaitTermination(t);
652	>	checkNotDone(task);
653	>	}
654	>
655	>	/**
656	>	* timed get is interruptible
657	>	*/
658	>	public void testTimedGet_interruptible() {
659	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
660	>	final FutureTask task = new FutureTask(new NoOpCallable());
661	>	Thread t = newStartedThread(new CheckedRunnable() {
662	>	public void realRun() throws Exception {
663	>	Thread.currentThread().interrupt();
664	>	try {
665	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
666	>	shouldThrow();
667	>	} catch (InterruptedException success) {}
668	>	assertFalse(Thread.interrupted());
669	>
670	>	pleaseInterrupt.countDown();
671	>	try {
672	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
673	>	shouldThrow();
674	>	} catch (InterruptedException success) {}
675	>	assertFalse(Thread.interrupted());
676	>	}});
677	>
678	>	await(pleaseInterrupt);
679	>	t.interrupt();
680	>	awaitTermination(t);
681	>	checkNotDone(task);
682	>	}
683	>
684	>	/**
685	>	* A timed out timed get throws TimeoutException
686	>	*/
687	>	public void testGet_TimeoutException() throws Exception {
688	>	FutureTask task = new FutureTask(new NoOpCallable());
689	>	long startTime = System.nanoTime();
690	>	try {
691	>	task.get(timeoutMillis(), MILLISECONDS);
692	>	shouldThrow();
693	>	} catch (TimeoutException success) {
694	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
695	>	}
696		}
697
698	+	/**
699	+	* timed get with null TimeUnit throws NullPointerException
700	+	*/
701	+	public void testGet_NullTimeUnit() throws Exception {
702	+	FutureTask task = new FutureTask(new NoOpCallable());
703	+	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
704	+
705	+	for (long timeout : timeouts) {
706	+	try {
707	+	task.get(timeout, null);
708	+	shouldThrow();
709	+	} catch (NullPointerException success) {}
710	+	}
711
712	<	public void testGet_Cancellation(){
713	<	final FutureTask ft = new FutureTask(new Callable(){
714	<	public Object call(){
715	<	try{
716	<	Thread.sleep(MEDIUM_DELAY_MS);
717	<	} catch(InterruptedException e){
718	<	fail("unexpected exception");
719	<	}
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");
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 success){
349	<	fail("unexpected exception");
350	<	}
351	<
352	<
712	>	task.run();
713	>
714	>	for (long timeout : timeouts) {
715	>	try {
716	>	task.get(timeout, null);
717	>	shouldThrow();
718	>	} catch (NullPointerException success) {}
719	>	}
720		}
721	<
721	>
722		}

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