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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 1.35 by jsr166, Mon Jan 14 21:54:42 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	>
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.runCount());
323	>	assertEquals(0, task.setCount());
324	>	assertEquals(0, task.setExceptionCount());
325	>	assertTrue(task.isCancelled());
326	>	assertTrue(task.isDone());
327	>	tryToConfuseDoneTask(task);
328	>	assertEquals(0, task.runCount());
329	>	checkCancelled(task);
330		}
331
332	+	/**
333	+	* cancel(true) before run succeeds
334	+	*/
335		public void testCancelBeforeRun2() {
336	<	FutureTask task = new FutureTask( new Callable() {
43	<	public Object call() { return Boolean.TRUE; } });
336	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
337		assertTrue(task.cancel(true));
338	<	task.run();
339	<	assertTrue(task.isDone());
340	<	assertTrue(task.isCancelled());
338	>	task.run();
339	>	assertEquals(0, task.runCount());
340	>	assertEquals(0, task.setCount());
341	>	assertEquals(0, task.setExceptionCount());
342	>	assertTrue(task.isCancelled());
343	>	assertTrue(task.isDone());
344	>	tryToConfuseDoneTask(task);
345	>	assertEquals(0, task.runCount());
346	>	checkCancelled(task);
347		}
348
349	+	/**
350	+	* cancel(false) of a completed task fails
351	+	*/
352		public void testCancelAfterRun() {
353	<	FutureTask task = new FutureTask( new Callable() {
354	<	public Object call() { return Boolean.TRUE; } });
53	<	task.run();
353	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
354	>	task.run();
355		assertFalse(task.cancel(false));
356	<	assertTrue(task.isDone());
357	<	assertFalse(task.isCancelled());
358	<	}
359	<
360	<	public void testCancelInterrupt(){
361	<	FutureTask task = new FutureTask( new Callable() {
362	<	public Object call() {
356	>	assertEquals(1, task.runCount());
357	>	assertEquals(1, task.setCount());
358	>	assertEquals(0, task.setExceptionCount());
359	>	tryToConfuseDoneTask(task);
360	>	checkCompletedNormally(task, Boolean.TRUE);
361	>	assertEquals(1, task.runCount());
362	>	}
363	>
364	>	/**
365	>	* cancel(true) of a completed task fails
366	>	*/
367	>	public void testCancelAfterRun2() {
368	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
369	>	task.run();
370	>	assertFalse(task.cancel(true));
371	>	assertEquals(1, task.runCount());
372	>	assertEquals(1, task.setCount());
373	>	assertEquals(0, task.setExceptionCount());
374	>	tryToConfuseDoneTask(task);
375	>	checkCompletedNormally(task, Boolean.TRUE);
376	>	assertEquals(1, task.runCount());
377	>	}
378	>
379	>	/**
380	>	* cancel(true) interrupts a running task that subsequently succeeds
381	>	*/
382	>	public void testCancelInterrupt() {
383	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
384	>	final PublicFutureTask task =
385	>	new PublicFutureTask(new CheckedRunnable() {
386	>	public void realRun() {
387	>	pleaseCancel.countDown();
388		try {
389	<	Thread.sleep(SHORT_DELAY_MS* 2);
390	<	fail("should throw");
391	<	}
392	<	catch (InterruptedException success) {}
67	<	return Boolean.TRUE;
68	<	} });
69	<	Thread t = new  Thread(task);
70	<	t.start();
71	<
72	<	try{
73	<	Thread.sleep(SHORT_DELAY_MS);
74	<	assertTrue(task.cancel(true));
75	<	t.join();
76	<	assertTrue(task.isDone());
77	<	assertTrue(task.isCancelled());
78	<	} catch(InterruptedException e){
79	<	fail("unexpected exception");
80	<	}
81	<	}
389	>	delay(LONG_DELAY_MS);
390	>	shouldThrow();
391	>	} catch (InterruptedException success) {}
392	>	}});
393
394	+	Thread t = newStartedThread(task);
395	+	await(pleaseCancel);
396	+	assertTrue(task.cancel(true));
397	+	assertTrue(task.isCancelled());
398	+	assertTrue(task.isDone());
399	+	awaitTermination(t);
400	+	assertEquals(1, task.runCount());
401	+	assertEquals(1, task.setCount());
402	+	assertEquals(0, task.setExceptionCount());
403	+	tryToConfuseDoneTask(task);
404	+	checkCancelled(task);
405	+	}
406	+
407	+	/**
408	+	* cancel(true) tries to interrupt a running task, but
409	+	* Thread.interrupt throws (simulating a restrictive security
410	+	* manager)
411	+	*/
412	+	public void testCancelInterrupt_ThrowsSecurityException() {
413	+	final CountDownLatch pleaseCancel = new CountDownLatch(1);
414	+	final CountDownLatch cancelled = new CountDownLatch(1);
415	+	final PublicFutureTask task =
416	+	new PublicFutureTask(new CheckedRunnable() {
417	+	public void realRun() {
418	+	pleaseCancel.countDown();
419	+	await(cancelled);
420	+	assertFalse(Thread.interrupted());
421	+	}});
422	+
423	+	final Thread t = new Thread(task) {
424	+	// Simulate a restrictive security manager.
425	+	@Override public void interrupt() {
426	+	throw new SecurityException();
427	+	}};
428	+	t.setDaemon(true);
429	+	t.start();
430
431	<	public void testCancelNoInterrupt(){
432	<	FutureTask task = new FutureTask( new Callable() {
433	<	public Object call() {
431	>	await(pleaseCancel);
432	>	try {
433	>	task.cancel(true);
434	>	shouldThrow();
435	>	} catch (SecurityException expected) {}
436	>
437	>	// We failed to deliver the interrupt, but the world retains
438	>	// its sanity, as if we had done task.cancel(false)
439	>	assertTrue(task.isCancelled());
440	>	assertTrue(task.isDone());
441	>	assertEquals(1, task.runCount());
442	>	assertEquals(1, task.doneCount());
443	>	assertEquals(0, task.setCount());
444	>	assertEquals(0, task.setExceptionCount());
445	>	cancelled.countDown();
446	>	awaitTermination(t);
447	>	assertEquals(1, task.setCount());
448	>	assertEquals(0, task.setExceptionCount());
449	>	tryToConfuseDoneTask(task);
450	>	checkCancelled(task);
451	>	}
452	>
453	>	/**
454	>	* cancel(true) interrupts a running task that subsequently throws
455	>	*/
456	>	public void testCancelInterrupt_taskFails() {
457	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
458	>	final PublicFutureTask task =
459	>	new PublicFutureTask(new Runnable() {
460	>	public void run() {
461		try {
462	<	Thread.sleep(SHORT_DELAY_MS* 2);
463	<	}
464	<	catch (InterruptedException success) {
465	<	fail("should not interrupt");
462	>	pleaseCancel.countDown();
463	>	delay(LONG_DELAY_MS);
464	>	shouldThrow();
465	>	} catch (Throwable t) {
466	>	assertTrue(t instanceof InterruptedException);
467		}
468	+	throw new RuntimeException();
469	+	}});
470	+
471	+	Thread t = newStartedThread(task);
472	+	await(pleaseCancel);
473	+	assertTrue(task.cancel(true));
474	+	assertTrue(task.isCancelled());
475	+	awaitTermination(t);
476	+	assertEquals(1, task.runCount());
477	+	assertEquals(0, task.setCount());
478	+	assertEquals(1, task.setExceptionCount());
479	+	tryToConfuseDoneTask(task);
480	+	checkCancelled(task);
481	+	}
482	+
483	+	/**
484	+	* cancel(false) does not interrupt a running task
485	+	*/
486	+	public void testCancelNoInterrupt() {
487	+	final CountDownLatch pleaseCancel = new CountDownLatch(1);
488	+	final CountDownLatch cancelled = new CountDownLatch(1);
489	+	final PublicFutureTask task =
490	+	new PublicFutureTask(new CheckedCallable<Boolean>() {
491	+	public Boolean realCall() {
492	+	pleaseCancel.countDown();
493	+	await(cancelled);
494	+	assertFalse(Thread.interrupted());
495		return Boolean.TRUE;
496	<	} });
497	<	Thread t = new  Thread(task);
498	<	t.start();
499	<
500	<	try{
501	<	Thread.sleep(SHORT_DELAY_MS);
502	<	assertTrue(task.cancel(false));
503	<	t.join();
504	<	assertTrue(task.isDone());
505	<	assertTrue(task.isCancelled());
506	<	} catch(InterruptedException e){
507	<	fail("unexpected exception");
496	>	}});
497	>
498	>	Thread t = newStartedThread(task);
499	>	await(pleaseCancel);
500	>	assertTrue(task.cancel(false));
501	>	assertTrue(task.isCancelled());
502	>	cancelled.countDown();
503	>	awaitTermination(t);
504	>	assertEquals(1, task.runCount());
505	>	assertEquals(1, task.setCount());
506	>	assertEquals(0, task.setExceptionCount());
507	>	tryToConfuseDoneTask(task);
508	>	checkCancelled(task);
509	>	}
510	>
511	>	/**
512	>	* run in one thread causes get in another thread to retrieve value
513	>	*/
514	>	public void testGetRun() {
515	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
516	>
517	>	final PublicFutureTask task =
518	>	new PublicFutureTask(new CheckedCallable<Object>() {
519	>	public Object realCall() {
520	>	return two;
521	>	}});
522	>
523	>	Thread t1 = newStartedThread(new CheckedRunnable() {
524	>	public void realRun() throws Exception {
525	>	pleaseRun.countDown();
526	>	assertSame(two, task.get());
527	>	}});
528	>
529	>	Thread t2 = newStartedThread(new CheckedRunnable() {
530	>	public void realRun() throws Exception {
531	>	pleaseRun.countDown();
532	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
533	>	}});
534	>
535	>	await(pleaseRun);
536	>	checkNotDone(task);
537	>	assertTrue(t1.isAlive());
538	>	assertTrue(t2.isAlive());
539	>	task.run();
540	>	checkCompletedNormally(task, two);
541	>	assertEquals(1, task.runCount());
542	>	assertEquals(1, task.setCount());
543	>	assertEquals(0, task.setExceptionCount());
544	>	awaitTermination(t1);
545	>	awaitTermination(t2);
546	>	tryToConfuseDoneTask(task);
547	>	checkCompletedNormally(task, two);
548	>	}
549	>
550	>	/**
551	>	* set in one thread causes get in another thread to retrieve value
552	>	*/
553	>	public void testGetSet() {
554	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
555	>
556	>	final PublicFutureTask task =
557	>	new PublicFutureTask(new CheckedCallable<Object>() {
558	>	public Object realCall() throws InterruptedException {
559	>	return two;
560	>	}});
561	>
562	>	Thread t1 = newStartedThread(new CheckedRunnable() {
563	>	public void realRun() throws Exception {
564	>	pleaseSet.countDown();
565	>	assertSame(two, task.get());
566	>	}});
567	>
568	>	Thread t2 = newStartedThread(new CheckedRunnable() {
569	>	public void realRun() throws Exception {
570	>	pleaseSet.countDown();
571	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
572	>	}});
573	>
574	>	await(pleaseSet);
575	>	checkNotDone(task);
576	>	assertTrue(t1.isAlive());
577	>	assertTrue(t2.isAlive());
578	>	task.set(two);
579	>	assertEquals(0, task.runCount());
580	>	assertEquals(1, task.setCount());
581	>	assertEquals(0, task.setExceptionCount());
582	>	tryToConfuseDoneTask(task);
583	>	checkCompletedNormally(task, two);
584	>	awaitTermination(t1);
585	>	awaitTermination(t2);
586	>	}
587	>
588	>	/**
589	>	* Cancelling a task causes timed get in another thread to throw
590	>	* CancellationException
591	>	*/
592	>	public void testTimedGet_Cancellation() {
593	>	for (final boolean mayInterruptIfRunning :
594	>	new boolean[] { true, false }) {
595	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
596	>	final CountDownLatch cancelled = new CountDownLatch(1);
597	>	final PublicFutureTask task =
598	>	new PublicFutureTask(new CheckedCallable<Object>() {
599	>	public Object realCall() throws InterruptedException {
600	>	pleaseCancel.countDown();
601	>	if (mayInterruptIfRunning) {
602	>	try {
603	>	delay(2*LONG_DELAY_MS);
604	>	} catch (InterruptedException success) {}
605	>	} else {
606	>	await(cancelled);
607	>	}
608	>	return two;
609	>	}});
610	>
611	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
612	>	public void realRun() throws Exception {
613	>	pleaseCancel.countDown();
614	>	task.get();
615	>	}};
616	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
617	>	public void realRun() throws Exception {
618	>	pleaseCancel.countDown();
619	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
620	>	}};
621	>	t1.start();
622	>	t2.start();
623	>	Thread t3 = newStartedThread(task);
624	>	await(pleaseCancel);
625	>	checkIsRunning(task);
626	>	task.cancel(mayInterruptIfRunning);
627	>	checkCancelled(task);
628	>	awaitTermination(t1);
629	>	awaitTermination(t2);
630	>	cancelled.countDown();
631	>	awaitTermination(t3);
632	>	assertEquals(1, task.runCount());
633	>	assertEquals(1, task.setCount());
634	>	assertEquals(0, task.setExceptionCount());
635	>	tryToConfuseDoneTask(task);
636	>	checkCancelled(task);
637		}
638		}
639
640	<	public void testGet1() {
641	<	final FutureTask ft = new FutureTask(new Callable(){
642	<	public Object call(){
643	<	try{
644	<	Thread.sleep(MEDIUM_DELAY_MS);
645	<	} catch(InterruptedException e){
646	<	fail("unexpected exception");
647	<	}
648	<	return Boolean.TRUE;
649	<	}
650	<	});
651	<	Thread t = new Thread(new Runnable(){
652	<	public void run(){
653	<	try{
654	<	ft.get();
655	<	} catch(Exception e){
656	<	fail("unexpected exception");
657	<	}
658	<	}
659	<	});
660	<	try{
661	<	assertFalse(ft.isDone());
131	<	assertFalse(ft.isCancelled());
132	<	t.start();
133	<	Thread.sleep(SHORT_DELAY_MS);
134	<	ft.run();
135	<	t.join();
136	<	assertTrue(ft.isDone());
137	<	assertFalse(ft.isCancelled());
138	<	} catch(InterruptedException e){
139	<	fail("unexpected exception");
140	<
141	<	}
142	<	}
143	<
144	<	public void testTimedGet1() {
145	<	final FutureTask ft = new FutureTask(new Callable(){
146	<	public Object call(){
147	<	try{
148	<	Thread.sleep(MEDIUM_DELAY_MS);
149	<	} catch(InterruptedException e){
150	<	fail("unexpected exception");
151	<	}
152	<	return Boolean.TRUE;
153	<	}
154	<	});
155	<	Thread t = new Thread(new Runnable(){
156	<	public void run(){
157	<	try{
158	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
159	<	} catch(TimeoutException success) {
160	<	} catch(Exception e){
161	<	fail("unexpected exception");
162	<	}
163	<	}
164	<	});
165	<	try{
166	<	assertFalse(ft.isDone());
167	<	assertFalse(ft.isCancelled());
168	<	t.start();
169	<	ft.run();
170	<	t.join();
171	<	assertTrue(ft.isDone());
172	<	assertFalse(ft.isCancelled());
173	<	} catch(InterruptedException e){
174	<	fail("unexpected exception");
175	<
176	<	}
640	>	/**
641	>	* A runtime exception in task causes get to throw ExecutionException
642	>	*/
643	>	public void testGet_ExecutionException() throws InterruptedException {
644	>	final ArithmeticException e = new ArithmeticException();
645	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
646	>	public Object call() {
647	>	throw e;
648	>	}});
649	>
650	>	task.run();
651	>	assertEquals(1, task.runCount());
652	>	assertEquals(0, task.setCount());
653	>	assertEquals(1, task.setExceptionCount());
654	>	try {
655	>	task.get();
656	>	shouldThrow();
657	>	} catch (ExecutionException success) {
658	>	assertSame(e, success.getCause());
659	>	tryToConfuseDoneTask(task);
660	>	checkCompletedAbnormally(task, success.getCause());
661	>	}
662		}
663
664	+	/**
665	+	* A runtime exception in task causes timed get to throw ExecutionException
666	+	*/
667	+	public void testTimedGet_ExecutionException2() throws Exception {
668	+	final ArithmeticException e = new ArithmeticException();
669	+	final PublicFutureTask task = new PublicFutureTask(new Callable() {
670	+	public Object call() {
671	+	throw e;
672	+	}});
673
674	<	public void testGet_Cancellation(){
675	<	final FutureTask ft = new FutureTask(new Callable(){
676	<	public Object call(){
677	<	try{
678	<	Thread.sleep(MEDIUM_DELAY_MS);
679	<	} catch(InterruptedException e){
680	<	fail("unexpected exception");
681	<	}
682	<	return Boolean.TRUE;
683	<	}
684	<	});
685	<	try {
686	<	Thread.sleep(SHORT_DELAY_MS);
687	<	Thread t = new Thread(new Runnable(){
688	<	public void run(){
689	<	try{
690	<	ft.get();
691	<	fail("should throw");
692	<	} catch(CancellationException success){
693	<	}
694	<	catch(Exception e){
695	<	fail("unexpected exception");
696	<	}
697	<	}
698	<	});
699	<	t.start();
700	<	ft.cancel(true);
701	<	t.join();
702	<	} catch(InterruptedException success){
703	<	fail("unexpected exception");
704	<	}
705	<	}
706	<
707	<	public void testGet_Cancellation2(){
708	<	final FutureTask ft = new FutureTask(new Callable(){
709	<	public Object call(){
710	<	try{
711	<	Thread.sleep(SHORT_DELAY_MS);
712	<	} catch(InterruptedException e) {
713	<	fail("unexpected exception");
714	<	}
715	<	return Boolean.TRUE;
716	<	}
717	<	});
718	<	try{
719	<	Thread.sleep(100);
720	<	Thread t = new Thread(new Runnable(){
721	<	public void run(){
722	<	try{
723	<	ft.get(3 * SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
724	<	fail("should throw");
725	<	} catch(CancellationException success) {}
726	<	catch(Exception e){
727	<	fail("unexpected exception");
728	<	}
729	<	}
730	<	});
731	<	t.start();
732	<	Thread.sleep(SHORT_DELAY_MS);
733	<	ft.cancel(true);
734	<	Thread.sleep(SHORT_DELAY_MS);
735	<	t.join();
736	<	} catch(InterruptedException ie){
737	<	fail("unexpected exception");
738	<	}
739	<	}
740	<
741	<	public void testGet_ExecutionException(){
742	<	final FutureTask ft = new FutureTask(new Callable(){
743	<	public Object call(){
744	<	int i = 5/0;
745	<	return Boolean.TRUE;
746	<	}
747	<	});
748	<	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	<	});
674	>	task.run();
675	>	try {
676	>	task.get(LONG_DELAY_MS, MILLISECONDS);
677	>	shouldThrow();
678	>	} catch (ExecutionException success) {
679	>	assertSame(e, success.getCause());
680	>	tryToConfuseDoneTask(task);
681	>	checkCompletedAbnormally(task, success.getCause());
682	>	}
683	>	}
684	>
685	>	/**
686	>	* get is interruptible
687	>	*/
688	>	public void testGet_interruptible() {
689	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
690	>	final FutureTask task = new FutureTask(new NoOpCallable());
691	>	Thread t = newStartedThread(new CheckedRunnable() {
692	>	public void realRun() throws Exception {
693	>	Thread.currentThread().interrupt();
694	>	try {
695	>	task.get();
696	>	shouldThrow();
697	>	} catch (InterruptedException success) {}
698	>	assertFalse(Thread.interrupted());
699	>
700	>	pleaseInterrupt.countDown();
701	>	try {
702	>	task.get();
703	>	shouldThrow();
704	>	} catch (InterruptedException success) {}
705	>	assertFalse(Thread.interrupted());
706	>	}});
707	>
708	>	await(pleaseInterrupt);
709	>	t.interrupt();
710	>	awaitTermination(t);
711	>	checkNotDone(task);
712	>	}
713	>
714	>	/**
715	>	* timed get is interruptible
716	>	*/
717	>	public void testTimedGet_interruptible() {
718	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
719	>	final FutureTask task = new FutureTask(new NoOpCallable());
720	>	Thread t = newStartedThread(new CheckedRunnable() {
721	>	public void realRun() throws Exception {
722	>	Thread.currentThread().interrupt();
723	>	try {
724	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
725	>	shouldThrow();
726	>	} catch (InterruptedException success) {}
727	>	assertFalse(Thread.interrupted());
728	>
729	>	pleaseInterrupt.countDown();
730	>	try {
731	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
732	>	shouldThrow();
733	>	} catch (InterruptedException success) {}
734	>	assertFalse(Thread.interrupted());
735	>	}});
736	>
737	>	await(pleaseInterrupt);
738	>	t.interrupt();
739	>	awaitTermination(t);
740	>	checkNotDone(task);
741	>	}
742	>
743	>	/**
744	>	* A timed out timed get throws TimeoutException
745	>	*/
746	>	public void testGet_TimeoutException() throws Exception {
747	>	FutureTask task = new FutureTask(new NoOpCallable());
748	>	long startTime = System.nanoTime();
749		try {
750	<	t.start();
751	<	Thread.sleep(SHORT_DELAY_MS);
752	<	t.interrupt();
753	<	t.join();
306	<	} catch(Exception e){
307	<	fail("unexpected exception");
750	>	task.get(timeoutMillis(), MILLISECONDS);
751	>	shouldThrow();
752	>	} catch (TimeoutException success) {
753	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
754		}
755		}
756
757	<	public void testTimedGet_InterruptedException2(){
758	<	final FutureTask ft = new FutureTask(new Callable(){
759	<	public Object call(){
760	<	return new Object();
761	<	}
762	<	});
763	<	Thread t = new Thread(new Runnable(){
764	<	public void run(){
765	<	try{
766	<	ft.get(100,TimeUnit.SECONDS);
767	<	fail("should throw");
768	<	} catch(InterruptedException success){}
769	<	catch(Exception e){
770	<	fail("unexpected exception");
771	<	}
772	<	}
773	<	});
774	<	try {
775	<	t.start();
776	<	Thread.sleep(SHORT_DELAY_MS);
777	<	t.interrupt();
778	<	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	<
757	>	/**
758	>	* timed get with null TimeUnit throws NullPointerException
759	>	*/
760	>	public void testGet_NullTimeUnit() throws Exception {
761	>	FutureTask task = new FutureTask(new NoOpCallable());
762	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
763	>
764	>	for (long timeout : timeouts) {
765	>	try {
766	>	task.get(timeout, null);
767	>	shouldThrow();
768	>	} catch (NullPointerException success) {}
769	>	}
770	>
771	>	task.run();
772	>
773	>	for (long timeout : timeouts) {
774	>	try {
775	>	task.get(timeout, null);
776	>	shouldThrow();
777	>	} catch (NullPointerException success) {}
778	>	}
779		}
780	<
780	>
781		}

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