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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.3 by dl, Fri Sep 12 15:40:25 2003 UTC vs.
Revision 1.29 by jsr166, Mon Jun 20 04:31:59 2011 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;
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	<	public void testConstructor(){
55	<	try {
56	<	FutureTask task = new FutureTask(null);
57	<	fail("should throw");
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	<	catch(NullPointerException success) {
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	<	public void testConstructor2(){
77	>	<T> void checkCompletedNormally(Future<T> f, T expected) {
78	>	checkIsDone(f);
79	>	assertFalse(f.isCancelled());
80	>
81		try {
82	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
83	<	fail("should throw");
84	<	}
85	<	catch(NullPointerException success) {
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	<	public void testIsDone(){
115	<	FutureTask task = new FutureTask( new Callable() {
116	<	public Object call() { return Boolean.TRUE; } });
117	<	task.run();
118	<	assertTrue(task.isDone());
119	<	assertFalse(task.isCancelled());
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	>	public void done() {
176	>	assertTrue(isDone());
177	>	doneCount.incrementAndGet();
178	>	super.done();
179	>	}
180	>	public boolean runAndReset() {
181	>	runAndResetCount.incrementAndGet();
182	>	return super.runAndReset();
183	>	}
184	>	public void set(Object x) {
185	>	setCount.incrementAndGet();
186	>	super.set(x);
187	>	}
188	>	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() {
52	<	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() {
61	<	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; } });
71	<	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	<	} });
87	<	Thread t = new  Thread(task);
88	<	t.start();
89	<
90	<	try{
91	<	Thread.sleep(SHORT_DELAY_MS);
92	<	assertTrue(task.cancel(true));
93	<	t.join();
94	<	assertTrue(task.isDone());
95	<	assertTrue(task.isCancelled());
96	<	} catch(InterruptedException e){
97	<	fail("unexpected exception");
98	<	}
99	<	}
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	<	public void testCancelNoInterrupt(){
553	<	FutureTask task = new FutureTask( new Callable() {
554	<	public Object call() {
555	<	try {
556	<	Thread.sleep(SHORT_DELAY_MS* 2);
557	<	}
558	<	catch (InterruptedException success) {
559	<	fail("should not interrupt");
560	<	}
561	<	return Boolean.TRUE;
562	<	} });
563	<	Thread t = new  Thread(task);
564	<	t.start();
565	<
566	<	try{
567	<	Thread.sleep(SHORT_DELAY_MS);
568	<	assertTrue(task.cancel(false));
569	<	t.join();
570	<	assertTrue(task.isDone());
571	<	assertTrue(task.isCancelled());
572	<	} catch(InterruptedException e){
573	<	fail("unexpected exception");
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	<	public void testGet1() {
582	<	final FutureTask ft = new FutureTask(new Callable(){
583	<	public Object call(){
584	<	try{
585	<	Thread.sleep(MEDIUM_DELAY_MS);
586	<	} catch(InterruptedException e){
587	<	fail("unexpected exception");
588	<	}
589	<	return Boolean.TRUE;
590	<	}
591	<	});
592	<	Thread t = new Thread(new Runnable(){
593	<	public void run(){
594	<	try{
595	<	ft.get();
596	<	} catch(Exception e){
597	<	fail("unexpected exception");
598	<	}
599	<	}
600	<	});
601	<	try{
602	<	assertFalse(ft.isDone());
149	<	assertFalse(ft.isCancelled());
150	<	t.start();
151	<	Thread.sleep(SHORT_DELAY_MS);
152	<	ft.run();
153	<	t.join();
154	<	assertTrue(ft.isDone());
155	<	assertFalse(ft.isCancelled());
156	<	} catch(InterruptedException e){
157	<	fail("unexpected exception");
158	<
159	<	}
160	<	}
161	<
162	<	public void testTimedGet1() {
163	<	final FutureTask ft = new FutureTask(new Callable(){
164	<	public Object call(){
165	<	try{
166	<	Thread.sleep(MEDIUM_DELAY_MS);
167	<	} catch(InterruptedException e){
168	<	fail("unexpected exception");
169	<	}
170	<	return Boolean.TRUE;
171	<	}
172	<	});
173	<	Thread t = new Thread(new Runnable(){
174	<	public void run(){
175	<	try{
176	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
177	<	} catch(TimeoutException success) {
178	<	} catch(Exception e){
179	<	fail("unexpected exception");
180	<	}
181	<	}
182	<	});
183	<	try{
184	<	assertFalse(ft.isDone());
185	<	assertFalse(ft.isCancelled());
186	<	t.start();
187	<	ft.run();
188	<	t.join();
189	<	assertTrue(ft.isDone());
190	<	assertFalse(ft.isCancelled());
191	<	} catch(InterruptedException e){
192	<	fail("unexpected exception");
193	<
194	<	}
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	+	/**
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	<	public void testGet_Cancellation(){
616	<	final FutureTask ft = new FutureTask(new Callable(){
617	<	public Object call(){
618	<	try{
619	<	Thread.sleep(MEDIUM_DELAY_MS);
620	<	} catch(InterruptedException e){
621	<	fail("unexpected exception");
622	<	}
623	<	return Boolean.TRUE;
624	<	}
625	<	});
626	<	try {
627	<	Thread.sleep(SHORT_DELAY_MS);
628	<	Thread t = new Thread(new Runnable(){
629	<	public void run(){
630	<	try{
631	<	ft.get();
632	<	fail("should throw");
633	<	} catch(CancellationException success){
634	<	}
635	<	catch(Exception e){
636	<	fail("unexpected exception");
637	<	}
638	<	}
639	<	});
640	<	t.start();
641	<	ft.cancel(true);
642	<	t.join();
643	<	} catch(InterruptedException success){
644	<	fail("unexpected exception");
645	<	}
646	<	}
647	<
648	<	public void testGet_Cancellation2(){
649	<	final FutureTask ft = new FutureTask(new Callable(){
650	<	public Object call(){
651	<	try{
652	<	Thread.sleep(SHORT_DELAY_MS);
653	<	} catch(InterruptedException e) {
654	<	fail("unexpected exception");
655	<	}
656	<	return Boolean.TRUE;
657	<	}
658	<	});
659	<	try{
660	<	Thread.sleep(100);
661	<	Thread t = new Thread(new Runnable(){
662	<	public void run(){
663	<	try{
664	<	ft.get(3 * SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
665	<	fail("should throw");
666	<	} catch(CancellationException success) {}
667	<	catch(Exception e){
668	<	fail("unexpected exception");
669	<	}
670	<	}
671	<	});
672	<	t.start();
673	<	Thread.sleep(SHORT_DELAY_MS);
674	<	ft.cancel(true);
675	<	Thread.sleep(SHORT_DELAY_MS);
676	<	t.join();
677	<	} catch(InterruptedException ie){
678	<	fail("unexpected exception");
679	<	}
680	<	}
681	<
682	<	public void testGet_ExecutionException(){
683	<	final FutureTask ft = new FutureTask(new Callable(){
684	<	public Object call(){
685	<	int i = 5/0;
686	<	return Boolean.TRUE;
687	<	}
688	<	});
689	<	try{
690	<	ft.run();
691	<	ft.get();
692	<	fail("should throw");
693	<	} catch(ExecutionException success){
694	<	}
695	<	catch(Exception e){
696	<	fail("unexpected exception");
697	<	}
698	<	}
699	<
700	<	public void testTimedGet_ExecutionException2(){
701	<	final FutureTask ft = new FutureTask(new Callable(){
702	<	public Object call(){
703	<	int i = 5/0;
704	<	return Boolean.TRUE;
705	<	}
706	<	});
707	<	try{
708	<	ft.run();
709	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
710	<	fail("should throw");
711	<	} catch(ExecutionException success) {
712	<	} catch(TimeoutException success) { } // unlikely but OK
713	<	catch(Exception e){
714	<	fail("unexpected exception");
715	<	}
716	<	}
717	<
718	<
719	<	public void testGet_InterruptedException(){
303	<	final FutureTask ft = new FutureTask(new Callable(){
304	<	public Object call(){
305	<	return new Object();
306	<	}
307	<	});
308	<	Thread t = new Thread(new Runnable(){
309	<	public void run(){
310	<	try{
311	<	ft.get();
312	<	fail("should throw");
313	<	} catch(InterruptedException success){
314	<	} catch(Exception e){
315	<	fail("unexpected exception");
316	<	}
317	<	}
318	<	});
319	<	try {
320	<	t.start();
321	<	Thread.sleep(SHORT_DELAY_MS);
322	<	t.interrupt();
323	<	t.join();
324	<	} catch(Exception e){
325	<	fail("unexpected exception");
326	<	}
327	<	}
328	<
329	<	public void testTimedGet_InterruptedException2(){
330	<	final FutureTask ft = new FutureTask(new Callable(){
331	<	public Object call(){
332	<	return new Object();
333	<	}
334	<	});
335	<	Thread t = new Thread(new Runnable(){
336	<	public void run(){
337	<	try{
338	<	ft.get(100,TimeUnit.SECONDS);
339	<	fail("should throw");
340	<	} catch(InterruptedException success){}
341	<	catch(Exception e){
342	<	fail("unexpected exception");
343	<	}
344	<	}
345	<	});
346	<	try {
347	<	t.start();
348	<	Thread.sleep(SHORT_DELAY_MS);
349	<	t.interrupt();
350	<	t.join();
351	<	} catch(Exception e){
352	<	fail("unexpected exception");
353	<	}
354	<	}
355	<
356	<	public void testGet_TimeoutException(){
357	<	FutureTask ft = new FutureTask(new Callable(){
358	<	public Object call(){
359	<	return new Object();
360	<	}
361	<	});
362	<	try{
363	<	ft.get(1,TimeUnit.MILLISECONDS);
364	<	fail("should throw");
365	<	} catch(TimeoutException success){}
366	<	catch(Exception success){
367	<	fail("unexpected exception");
368	<	}
369	<
370	<
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	>	/**
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	>	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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