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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.17 by jsr166, Sat Nov 21 10:25:05 2009 UTC vs.
Revision 1.33 by jsr166, Thu Dec 20 04:58:53 2012 UTC

#	Line 1 | Line 1
1		/*
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/licenses/publicdomain
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.security.Permission;
11	>	import java.util.concurrent.Callable;
12	>	import java.util.concurrent.CancellationException;
13	>	import java.util.concurrent.CountDownLatch;
14	>	import java.util.concurrent.ExecutionException;
15	>	import java.util.concurrent.Future;
16	>	import java.util.concurrent.FutureTask;
17	>	import java.util.concurrent.TimeoutException;
18	>	import java.util.concurrent.atomic.AtomicInteger;
19		import static java.util.concurrent.TimeUnit.MILLISECONDS;
20	+	import static java.util.concurrent.TimeUnit.SECONDS;
21		import java.util.*;
22
23		public class FutureTaskTest extends JSR166TestCase {
24
25		public static void main(String[] args) {
26	<	junit.textui.TestRunner.run (suite());
26	>	junit.textui.TestRunner.run(suite());
27		}
28		public static Test suite() {
29		return new TestSuite(FutureTaskTest.class);
30		}
31
32	+	void checkIsDone(Future<?> f) {
33	+	assertTrue(f.isDone());
34	+	assertFalse(f.cancel(false));
35	+	assertFalse(f.cancel(true));
36	+	if (f instanceof PublicFutureTask) {
37	+	PublicFutureTask pf = (PublicFutureTask) f;
38	+	assertEquals(1, pf.doneCount());
39	+	assertFalse(pf.runAndReset());
40	+	assertEquals(1, pf.doneCount());
41	+
42	+	// Check that run and runAndReset have no effect.
43	+	int savedRunCount = pf.runCount();
44	+	int savedSetCount = pf.setCount();
45	+	int savedSetExceptionCount = pf.setExceptionCount();
46	+	pf.run();
47	+	pf.runAndReset();
48	+	assertEquals(savedRunCount, pf.runCount());
49	+	assertEquals(savedSetCount, pf.setCount());
50	+	assertEquals(savedSetExceptionCount, pf.setExceptionCount());
51	+	assertTrue(f.isDone());
52	+	}
53	+	}
54	+
55	+	void checkNotDone(Future<?> f) {
56	+	assertFalse(f.isDone());
57	+	assertFalse(f.isCancelled());
58	+	if (f instanceof PublicFutureTask) {
59	+	PublicFutureTask pf = (PublicFutureTask) f;
60	+	assertEquals(0, pf.doneCount());
61	+	assertEquals(0, pf.setCount());
62	+	assertEquals(0, pf.setExceptionCount());
63	+	}
64	+	}
65	+
66	+	void checkIsRunning(Future<?> f) {
67	+	checkNotDone(f);
68	+	if (f instanceof FutureTask) {
69	+	FutureTask ft = (FutureTask<?>) f;
70	+	// Check that run methods do nothing
71	+	ft.run();
72	+	if (f instanceof PublicFutureTask)
73	+	assertFalse(((PublicFutureTask) f).runAndReset());
74	+	checkNotDone(f);
75	+	}
76	+	}
77	+
78	+	<T> void checkCompletedNormally(Future<T> f, T expected) {
79	+	checkIsDone(f);
80	+	assertFalse(f.isCancelled());
81	+
82	+	try {
83	+	assertSame(expected, f.get());
84	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
85	+	try {
86	+	assertSame(expected, f.get(5L, SECONDS));
87	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
88	+	}
89	+
90	+	void checkCancelled(Future<?> f) {
91	+	checkIsDone(f);
92	+	assertTrue(f.isCancelled());
93	+
94	+	try {
95	+	f.get();
96	+	shouldThrow();
97	+	} catch (CancellationException success) {
98	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
99	+
100	+	try {
101	+	f.get(5L, SECONDS);
102	+	shouldThrow();
103	+	} catch (CancellationException success) {
104	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
105	+	}
106	+
107	+	void tryToConfuseDoneTask(PublicFutureTask pf) {
108	+	pf.set(new Object());
109	+	pf.setException(new Error());
110	+	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
111	+	pf.cancel(true);
112	+	}
113	+	}
114	+
115	+	void checkCompletedAbnormally(Future<?> f, Throwable t) {
116	+	checkIsDone(f);
117	+	assertFalse(f.isCancelled());
118	+
119	+	try {
120	+	f.get();
121	+	shouldThrow();
122	+	} catch (ExecutionException success) {
123	+	assertSame(t, success.getCause());
124	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
125	+
126	+	try {
127	+	f.get(5L, SECONDS);
128	+	shouldThrow();
129	+	} catch (ExecutionException success) {
130	+	assertSame(t, success.getCause());
131	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
132	+	}
133	+
134		/**
135		* Subclass to expose protected methods
136		*/
137		static class PublicFutureTask extends FutureTask {
138	<	public PublicFutureTask(Callable r) { super(r); }
139	<	public boolean runAndReset() { return super.runAndReset(); }
140	<	public void set(Object x) { super.set(x); }
141	<	public void setException(Throwable t) { super.setException(t); }
138	>	private final AtomicInteger runCount;
139	>	private final AtomicInteger doneCount = new AtomicInteger(0);
140	>	private final AtomicInteger runAndResetCount = new AtomicInteger(0);
141	>	private final AtomicInteger setCount = new AtomicInteger(0);
142	>	private final AtomicInteger setExceptionCount = new AtomicInteger(0);
143	>	public int runCount() { return runCount.get(); }
144	>	public int doneCount() { return doneCount.get(); }
145	>	public int runAndResetCount() { return runAndResetCount.get(); }
146	>	public int setCount() { return setCount.get(); }
147	>	public int setExceptionCount() { return setExceptionCount.get(); }
148	>
149	>	PublicFutureTask(Runnable runnable) {
150	>	this(runnable, seven);
151	>	}
152	>	PublicFutureTask(Runnable runnable, Object result) {
153	>	this(runnable, result, new AtomicInteger(0));
154	>	}
155	>	private PublicFutureTask(final Runnable runnable, Object result,
156	>	final AtomicInteger runCount) {
157	>	super(new Runnable() {
158	>	public void run() {
159	>	runCount.getAndIncrement();
160	>	runnable.run();
161	>	}}, result);
162	>	this.runCount = runCount;
163	>	}
164	>	PublicFutureTask(Callable callable) {
165	>	this(callable, new AtomicInteger(0));
166	>	}
167	>	private PublicFutureTask(final Callable callable,
168	>	final AtomicInteger runCount) {
169	>	super(new Callable() {
170	>	public Object call() throws Exception {
171	>	runCount.getAndIncrement();
172	>	return callable.call();
173	>	}});
174	>	this.runCount = runCount;
175	>	}
176	>	@Override public void done() {
177	>	assertTrue(isDone());
178	>	doneCount.incrementAndGet();
179	>	super.done();
180	>	}
181	>	@Override public boolean runAndReset() {
182	>	runAndResetCount.incrementAndGet();
183	>	return super.runAndReset();
184	>	}
185	>	@Override public void set(Object x) {
186	>	setCount.incrementAndGet();
187	>	super.set(x);
188	>	}
189	>	@Override public void setException(Throwable t) {
190	>	setExceptionCount.incrementAndGet();
191	>	super.setException(t);
192	>	}
193	>	}
194	>
195	>	class Counter extends CheckedRunnable {
196	>	final AtomicInteger count = new AtomicInteger(0);
197	>	public int get() { return count.get(); }
198	>	public void realRun() {
199	>	count.getAndIncrement();
200	>	}
201		}
202
203		/**
204	<	* Creating a future with a null callable throws NPE
204	>	* creating a future with a null callable throws NullPointerException
205		*/
206		public void testConstructor() {
207		try {
208	<	FutureTask task = new FutureTask(null);
208	>	new FutureTask(null);
209		shouldThrow();
210		} catch (NullPointerException success) {}
211		}
212
213		/**
214	<	* creating a future with null runnable fails
214	>	* creating a future with null runnable throws NullPointerException
215		*/
216		public void testConstructor2() {
217		try {
218	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
218	>	new FutureTask(null, Boolean.TRUE);
219		shouldThrow();
220		} catch (NullPointerException success) {}
221		}
#	Line 54 | Line 224 | public class FutureTaskTest extends JSR1
224		* isDone is true when a task completes
225		*/
226		public void testIsDone() {
227	<	FutureTask task = new FutureTask(new NoOpCallable());
227	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
228	>	assertFalse(task.isDone());
229		task.run();
230		assertTrue(task.isDone());
231	<	assertFalse(task.isCancelled());
231	>	checkCompletedNormally(task, Boolean.TRUE);
232	>	assertEquals(1, task.runCount());
233		}
234
235		/**
#	Line 65 | Line 237 | public class FutureTaskTest extends JSR1
237		*/
238		public void testRunAndReset() {
239		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
240	<	assertTrue(task.runAndReset());
241	<	assertFalse(task.isDone());
240	>	for (int i = 0; i < 3; i++) {
241	>	assertTrue(task.runAndReset());
242	>	checkNotDone(task);
243	>	assertEquals(i+1, task.runCount());
244	>	assertEquals(i+1, task.runAndResetCount());
245	>	assertEquals(0, task.setCount());
246	>	assertEquals(0, task.setExceptionCount());
247	>	}
248		}
249
250		/**
251		* runAndReset after cancellation fails
252		*/
253	<	public void testResetAfterCancel() {
254	<	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
255	<	assertTrue(task.cancel(false));
256	<	assertFalse(task.runAndReset());
257	<	assertTrue(task.isDone());
258	<	assertTrue(task.isCancelled());
253	>	public void testRunAndResetAfterCancel() {
254	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
255	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
256	>	assertTrue(task.cancel(mayInterruptIfRunning));
257	>	for (int i = 0; i < 3; i++) {
258	>	assertFalse(task.runAndReset());
259	>	assertEquals(0, task.runCount());
260	>	assertEquals(i+1, task.runAndResetCount());
261	>	assertEquals(0, task.setCount());
262	>	assertEquals(0, task.setExceptionCount());
263	>	}
264	>	tryToConfuseDoneTask(task);
265	>	checkCancelled(task);
266	>	}
267		}
268
83	–
84	–
269		/**
270		* setting value causes get to return it
271		*/
272		public void testSet() throws Exception {
273		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
274		task.set(one);
275	<	assertEquals(task.get(), one);
275	>	for (int i = 0; i < 3; i++) {
276	>	assertSame(one, task.get());
277	>	assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS));
278	>	assertEquals(1, task.setCount());
279	>	}
280	>	tryToConfuseDoneTask(task);
281	>	checkCompletedNormally(task, one);
282	>	assertEquals(0, task.runCount());
283		}
284
285		/**
286		* setException causes get to throw ExecutionException
287		*/
288	<	public void testSetException() throws Exception {
288	>	public void testSetException_get() throws Exception {
289		Exception nse = new NoSuchElementException();
290		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
291		task.setException(nse);
292	+
293	+	try {
294	+	task.get();
295	+	shouldThrow();
296	+	} catch (ExecutionException success) {
297	+	assertSame(nse, success.getCause());
298	+	checkCompletedAbnormally(task, nse);
299	+	}
300	+
301		try {
302	<	Object x = task.get();
302	>	task.get(LONG_DELAY_MS, MILLISECONDS);
303		shouldThrow();
304		} catch (ExecutionException success) {
305	<	assertSame(success.getCause(), nse);
305	>	assertSame(nse, success.getCause());
306	>	checkCompletedAbnormally(task, nse);
307		}
308	+
309	+	assertEquals(1, task.setExceptionCount());
310	+	assertEquals(0, task.setCount());
311	+	tryToConfuseDoneTask(task);
312	+	checkCompletedAbnormally(task, nse);
313	+	assertEquals(0, task.runCount());
314		}
315
316		/**
317	<	*  Cancelling before running succeeds
317	>	* cancel(false) before run succeeds
318		*/
319		public void testCancelBeforeRun() {
320	<	FutureTask task = new FutureTask(new NoOpCallable());
320	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
321		assertTrue(task.cancel(false));
322		task.run();
323	<	assertTrue(task.isDone());
323	>	assertEquals(0, task.runCount());
324	>	assertEquals(0, task.setCount());
325	>	assertEquals(0, task.setExceptionCount());
326		assertTrue(task.isCancelled());
327	+	assertTrue(task.isDone());
328	+	tryToConfuseDoneTask(task);
329	+	assertEquals(0, task.runCount());
330	+	checkCancelled(task);
331		}
332
333		/**
334	<	* Cancel(true) before run succeeds
334	>	* cancel(true) before run succeeds
335		*/
336		public void testCancelBeforeRun2() {
337	<	FutureTask task = new FutureTask(new NoOpCallable());
337	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
338		assertTrue(task.cancel(true));
339		task.run();
340	<	assertTrue(task.isDone());
340	>	assertEquals(0, task.runCount());
341	>	assertEquals(0, task.setCount());
342	>	assertEquals(0, task.setExceptionCount());
343		assertTrue(task.isCancelled());
344	+	assertTrue(task.isDone());
345	+	tryToConfuseDoneTask(task);
346	+	assertEquals(0, task.runCount());
347	+	checkCancelled(task);
348		}
349
350		/**
351	<	* cancel of a completed task fails
351	>	* cancel(false) of a completed task fails
352		*/
353		public void testCancelAfterRun() {
354	<	FutureTask task = new FutureTask(new NoOpCallable());
354	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
355		task.run();
356		assertFalse(task.cancel(false));
357	<	assertTrue(task.isDone());
358	<	assertFalse(task.isCancelled());
357	>	assertEquals(1, task.runCount());
358	>	assertEquals(1, task.setCount());
359	>	assertEquals(0, task.setExceptionCount());
360	>	tryToConfuseDoneTask(task);
361	>	checkCompletedNormally(task, Boolean.TRUE);
362	>	assertEquals(1, task.runCount());
363		}
364
365		/**
366	<	* cancel(true) interrupts a running task
366	>	* cancel(true) of a completed task fails
367		*/
368	<	public void testCancelInterrupt() throws InterruptedException {
369	<	final FutureTask task =
370	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
371	<	public Object realCall() throws InterruptedException {
372	<	Thread.sleep(SMALL_DELAY_MS);
373	<	return Boolean.TRUE;
368	>	public void testCancelAfterRun2() {
369	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
370	>	task.run();
371	>	assertFalse(task.cancel(true));
372	>	assertEquals(1, task.runCount());
373	>	assertEquals(1, task.setCount());
374	>	assertEquals(0, task.setExceptionCount());
375	>	tryToConfuseDoneTask(task);
376	>	checkCompletedNormally(task, Boolean.TRUE);
377	>	assertEquals(1, task.runCount());
378	>	}
379	>
380	>	/**
381	>	* cancel(true) interrupts a running task that subsequently succeeds
382	>	*/
383	>	public void testCancelInterrupt() {
384	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
385	>	final PublicFutureTask task =
386	>	new PublicFutureTask(new CheckedRunnable() {
387	>	public void realRun() {
388	>	pleaseCancel.countDown();
389	>	try {
390	>	delay(LONG_DELAY_MS);
391	>	shouldThrow();
392	>	} catch (InterruptedException success) {}
393		}});
394
395	<	Thread t = new Thread(task);
396	<	t.start();
155	<	Thread.sleep(SHORT_DELAY_MS);
395	>	Thread t = newStartedThread(task);
396	>	await(pleaseCancel);
397		assertTrue(task.cancel(true));
157	–	t.join();
158	–	assertTrue(task.isDone());
398		assertTrue(task.isCancelled());
399	+	assertTrue(task.isDone());
400	+	awaitTermination(t);
401	+	assertEquals(1, task.runCount());
402	+	assertEquals(1, task.setCount());
403	+	assertEquals(0, task.setExceptionCount());
404	+	tryToConfuseDoneTask(task);
405	+	checkCancelled(task);
406		}
407
162	–
408		/**
409	<	* cancel(false) does not interrupt a running task
410	<	*/
411	<	public void testCancelNoInterrupt() throws InterruptedException {
412	<	final FutureTask task =
413	<	new FutureTask(new CheckedCallable<Object>() {
414	<	public Object realCall() throws InterruptedException {
415	<	Thread.sleep(MEDIUM_DELAY_MS);
416	<	return Boolean.TRUE;
409	>	* cancel(true) tries to interrupt a running task, but
410	>	* Thread.interrupt throws (simulating a restrictive security
411	>	* manager)
412	>	*/
413	>	public void testCancelInterrupt_ThrowsSecurityException() {
414	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
415	>	final CountDownLatch cancelled = new CountDownLatch(1);
416	>	final PublicFutureTask task =
417	>	new PublicFutureTask(new CheckedRunnable() {
418	>	public void realRun() {
419	>	pleaseCancel.countDown();
420	>	await(cancelled);
421	>	assertFalse(Thread.interrupted());
422		}});
423
424	<	Thread t = new Thread(task);
424	>	final Thread t = new Thread(task) {
425	>	// Simulate a restrictive security manager.
426	>	@Override public void interrupt() {
427	>	throw new SecurityException();
428	>	}};
429	>	t.setDaemon(true);
430		t.start();
431	<	Thread.sleep(SHORT_DELAY_MS);
432	<	assertTrue(task.cancel(false));
433	<	t.join();
434	<	assertTrue(task.isDone());
431	>
432	>	await(pleaseCancel);
433	>	try {
434	>	task.cancel(true);
435	>	shouldThrow();
436	>	} catch (SecurityException expected) {}
437	>
438	>	// We failed to deliver the interrupt, but the world retains
439	>	// its sanity, as if we had done task.cancel(false)
440		assertTrue(task.isCancelled());
441	+	assertTrue(task.isDone());
442	+	assertEquals(1, task.runCount());
443	+	assertEquals(1, task.doneCount());
444	+	assertEquals(0, task.setCount());
445	+	assertEquals(0, task.setExceptionCount());
446	+	cancelled.countDown();
447	+	awaitTermination(t);
448	+	assertEquals(1, task.setCount());
449	+	assertEquals(0, task.setExceptionCount());
450	+	tryToConfuseDoneTask(task);
451	+	checkCancelled(task);
452		}
453
454		/**
455	<	* set in one thread causes get in another thread to retrieve value
456	<	*/
457	<	public void testGet1() throws InterruptedException {
458	<	final FutureTask ft =
459	<	new FutureTask(new CheckedCallable<Object>() {
460	<	public Object realCall() throws InterruptedException {
461	<	return Boolean.TRUE;
455	>	* cancel(true) interrupts a running task that subsequently throws
456	>	*/
457	>	public void testCancelInterrupt_taskFails() {
458	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
459	>	final PublicFutureTask task =
460	>	new PublicFutureTask(new Runnable() {
461	>	public void run() {
462	>	try {
463	>	pleaseCancel.countDown();
464	>	delay(LONG_DELAY_MS);
465	>	} finally { throw new RuntimeException(); }
466		}});
192	–	Thread t = new Thread(new CheckedRunnable() {
193	–	public void realRun() throws Exception {
194	–	assertSame(Boolean.TRUE, ft.get());
195	–	}});
467
468	<	assertFalse(ft.isDone());
469	<	assertFalse(ft.isCancelled());
470	<	t.start();
471	<	Thread.sleep(SHORT_DELAY_MS);
472	<	ft.run();
473	<	t.join();
474	<	assertTrue(ft.isDone());
475	<	assertFalse(ft.isCancelled());
468	>	Thread t = newStartedThread(task);
469	>	await(pleaseCancel);
470	>	assertTrue(task.cancel(true));
471	>	assertTrue(task.isCancelled());
472	>	awaitTermination(t);
473	>	assertEquals(1, task.runCount());
474	>	assertEquals(0, task.setCount());
475	>	assertEquals(1, task.setExceptionCount());
476	>	tryToConfuseDoneTask(task);
477	>	checkCancelled(task);
478		}
479
480		/**
481	<	* set in one thread causes timed get in another thread to retrieve value
481	>	* cancel(false) does not interrupt a running task
482		*/
483	<	public void testTimedGet1() throws InterruptedException {
484	<	final FutureTask ft =
485	<	new FutureTask(new CheckedCallable<Object>() {
486	<	public Object realCall() throws InterruptedException {
483	>	public void testCancelNoInterrupt() {
484	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
485	>	final CountDownLatch cancelled = new CountDownLatch(1);
486	>	final PublicFutureTask task =
487	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
488	>	public Boolean realCall() {
489	>	pleaseCancel.countDown();
490	>	await(cancelled);
491	>	assertFalse(Thread.interrupted());
492		return Boolean.TRUE;
493		}});
216	–	Thread t = new Thread(new CheckedRunnable() {
217	–	public void realRun() throws Exception {
218	–	assertSame(Boolean.TRUE, ft.get(SMALL_DELAY_MS, MILLISECONDS));
219	–	}});
494
495	<	assertFalse(ft.isDone());
496	<	assertFalse(ft.isCancelled());
497	<	t.start();
498	<	Thread.sleep(SHORT_DELAY_MS);
499	<	ft.run();
500	<	t.join();
501	<	assertTrue(ft.isDone());
502	<	assertFalse(ft.isCancelled());
495	>	Thread t = newStartedThread(task);
496	>	await(pleaseCancel);
497	>	assertTrue(task.cancel(false));
498	>	assertTrue(task.isCancelled());
499	>	cancelled.countDown();
500	>	awaitTermination(t);
501	>	assertEquals(1, task.runCount());
502	>	assertEquals(1, task.setCount());
503	>	assertEquals(0, task.setExceptionCount());
504	>	tryToConfuseDoneTask(task);
505	>	checkCancelled(task);
506		}
507
508		/**
509	<	*  Cancelling a task causes timed get in another thread to throw CancellationException
509	>	* run in one thread causes get in another thread to retrieve value
510		*/
511	<	public void testTimedGet_Cancellation() throws InterruptedException {
512	<	final FutureTask ft =
513	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
514	<	public Object realCall() throws InterruptedException {
515	<	Thread.sleep(SMALL_DELAY_MS);
516	<	return Boolean.TRUE;
511	>	public void testGetRun() {
512	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
513	>
514	>	final PublicFutureTask task =
515	>	new PublicFutureTask(new CheckedCallable<Object>() {
516	>	public Object realCall() {
517	>	return two;
518		}});
519
520	<	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
520	>	Thread t1 = newStartedThread(new CheckedRunnable() {
521		public void realRun() throws Exception {
522	<	ft.get(MEDIUM_DELAY_MS, MILLISECONDS);
523	<	}};
524	<	Thread t2 = new Thread(ft);
525	<	t1.start();
526	<	t2.start();
527	<	Thread.sleep(SHORT_DELAY_MS);
528	<	ft.cancel(true);
529	<	t1.join();
530	<	t2.join();
522	>	pleaseRun.countDown();
523	>	assertSame(two, task.get());
524	>	}});
525	>
526	>	Thread t2 = newStartedThread(new CheckedRunnable() {
527	>	public void realRun() throws Exception {
528	>	pleaseRun.countDown();
529	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
530	>	}});
531	>
532	>	await(pleaseRun);
533	>	checkNotDone(task);
534	>	assertTrue(t1.isAlive());
535	>	assertTrue(t2.isAlive());
536	>	task.run();
537	>	checkCompletedNormally(task, two);
538	>	assertEquals(1, task.runCount());
539	>	assertEquals(1, task.setCount());
540	>	assertEquals(0, task.setExceptionCount());
541	>	awaitTermination(t1);
542	>	awaitTermination(t2);
543	>	tryToConfuseDoneTask(task);
544	>	checkCompletedNormally(task, two);
545		}
546
547		/**
548	<	* Cancelling a task causes get in another thread to throw CancellationException
548	>	* set in one thread causes get in another thread to retrieve value
549		*/
550	<	public void testGet_Cancellation() throws InterruptedException {
551	<	final FutureTask ft =
552	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
550	>	public void testGetSet() {
551	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
552	>
553	>	final PublicFutureTask task =
554	>	new PublicFutureTask(new CheckedCallable<Object>() {
555		public Object realCall() throws InterruptedException {
556	<	Thread.sleep(SMALL_DELAY_MS);
263	<	return Boolean.TRUE;
556	>	return two;
557		}});
558	<	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
558	>
559	>	Thread t1 = newStartedThread(new CheckedRunnable() {
560		public void realRun() throws Exception {
561	<	ft.get();
562	<	}};
561	>	pleaseSet.countDown();
562	>	assertSame(two, task.get());
563	>	}});
564
565	<	Thread t2 = new Thread(ft);
566	<	t1.start();
567	<	t2.start();
568	<	Thread.sleep(SHORT_DELAY_MS);
569	<	ft.cancel(true);
570	<	t1.join();
571	<	t2.join();
565	>	Thread t2 = newStartedThread(new CheckedRunnable() {
566	>	public void realRun() throws Exception {
567	>	pleaseSet.countDown();
568	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
569	>	}});
570	>
571	>	await(pleaseSet);
572	>	checkNotDone(task);
573	>	assertTrue(t1.isAlive());
574	>	assertTrue(t2.isAlive());
575	>	task.set(two);
576	>	assertEquals(0, task.runCount());
577	>	assertEquals(1, task.setCount());
578	>	assertEquals(0, task.setExceptionCount());
579	>	tryToConfuseDoneTask(task);
580	>	checkCompletedNormally(task, two);
581	>	awaitTermination(t1);
582	>	awaitTermination(t2);
583		}
584
585	+	/**
586	+	* Cancelling a task causes timed get in another thread to throw
587	+	* CancellationException
588	+	*/
589	+	public void testTimedGet_Cancellation() {
590	+	for (final boolean mayInterruptIfRunning :
591	+	new boolean[] { true, false }) {
592	+	final CountDownLatch pleaseCancel = new CountDownLatch(3);
593	+	final CountDownLatch cancelled = new CountDownLatch(1);
594	+	final PublicFutureTask task =
595	+	new PublicFutureTask(new CheckedCallable<Object>() {
596	+	public Object realCall() throws InterruptedException {
597	+	pleaseCancel.countDown();
598	+	if (mayInterruptIfRunning) {
599	+	try {
600	+	delay(2*LONG_DELAY_MS);
601	+	} catch (InterruptedException success) {}
602	+	} else {
603	+	await(cancelled);
604	+	}
605	+	return two;
606	+	}});
607	+
608	+	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
609	+	public void realRun() throws Exception {
610	+	pleaseCancel.countDown();
611	+	task.get();
612	+	}};
613	+	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
614	+	public void realRun() throws Exception {
615	+	pleaseCancel.countDown();
616	+	task.get(2*LONG_DELAY_MS, MILLISECONDS);
617	+	}};
618	+	t1.start();
619	+	t2.start();
620	+	Thread t3 = newStartedThread(task);
621	+	await(pleaseCancel);
622	+	checkIsRunning(task);
623	+	task.cancel(mayInterruptIfRunning);
624	+	checkCancelled(task);
625	+	awaitTermination(t1);
626	+	awaitTermination(t2);
627	+	cancelled.countDown();
628	+	awaitTermination(t3);
629	+	assertEquals(1, task.runCount());
630	+	assertEquals(1, task.setCount());
631	+	assertEquals(0, task.setExceptionCount());
632	+	tryToConfuseDoneTask(task);
633	+	checkCancelled(task);
634	+	}
635	+	}
636
637		/**
638		* A runtime exception in task causes get to throw ExecutionException
639		*/
640		public void testGet_ExecutionException() throws InterruptedException {
641	<	final FutureTask ft = new FutureTask(new Callable() {
641	>	final ArithmeticException e = new ArithmeticException();
642	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
643		public Object call() {
644	<	return 5/0;
644	>	throw e;
645		}});
646
647	<	ft.run();
647	>	task.run();
648	>	assertEquals(1, task.runCount());
649	>	assertEquals(0, task.setCount());
650	>	assertEquals(1, task.setExceptionCount());
651		try {
652	<	ft.get();
652	>	task.get();
653		shouldThrow();
654		} catch (ExecutionException success) {
655	<	assertTrue(success.getCause() instanceof ArithmeticException);
655	>	assertSame(e, success.getCause());
656	>	tryToConfuseDoneTask(task);
657	>	checkCompletedAbnormally(task, success.getCause());
658		}
659		}
660
661		/**
662	<	*  A runtime exception in task causes timed get to throw ExecutionException
662	>	* A runtime exception in task causes timed get to throw ExecutionException
663		*/
664		public void testTimedGet_ExecutionException2() throws Exception {
665	<	final FutureTask ft = new FutureTask(new Callable() {
665	>	final ArithmeticException e = new ArithmeticException();
666	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
667		public Object call() {
668	<	return 5/0;
668	>	throw e;
669		}});
670
671	<	ft.run();
671	>	task.run();
672		try {
673	<	ft.get(SHORT_DELAY_MS, MILLISECONDS);
673	>	task.get(LONG_DELAY_MS, MILLISECONDS);
674		shouldThrow();
675		} catch (ExecutionException success) {
676	<	assertTrue(success.getCause() instanceof ArithmeticException);
676	>	assertSame(e, success.getCause());
677	>	tryToConfuseDoneTask(task);
678	>	checkCompletedAbnormally(task, success.getCause());
679		}
680		}
681
316	–
682		/**
683	<	* Interrupting a waiting get causes it to throw InterruptedException
683	>	* get is interruptible
684		*/
685	<	public void testGet_InterruptedException() throws InterruptedException {
686	<	final FutureTask ft = new FutureTask(new NoOpCallable());
687	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
685	>	public void testGet_interruptible() {
686	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
687	>	final FutureTask task = new FutureTask(new NoOpCallable());
688	>	Thread t = newStartedThread(new CheckedRunnable() {
689		public void realRun() throws Exception {
690	<	ft.get();
690	>	Thread.currentThread().interrupt();
691	>	try {
692	>	task.get();
693	>	shouldThrow();
694	>	} catch (InterruptedException success) {}
695	>	assertFalse(Thread.interrupted());
696	>
697	>	pleaseInterrupt.countDown();
698	>	try {
699	>	task.get();
700	>	shouldThrow();
701	>	} catch (InterruptedException success) {}
702	>	assertFalse(Thread.interrupted());
703		}});
704
705	<	t.start();
328	<	Thread.sleep(SHORT_DELAY_MS);
705	>	await(pleaseInterrupt);
706		t.interrupt();
707	<	t.join();
707	>	awaitTermination(t);
708	>	checkNotDone(task);
709		}
710
711		/**
712	<	*  Interrupting a waiting timed get causes it to throw InterruptedException
712	>	* timed get is interruptible
713		*/
714	<	public void testTimedGet_InterruptedException2() throws InterruptedException {
715	<	final FutureTask ft = new FutureTask(new NoOpCallable());
716	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
714	>	public void testTimedGet_interruptible() {
715	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
716	>	final FutureTask task = new FutureTask(new NoOpCallable());
717	>	Thread t = newStartedThread(new CheckedRunnable() {
718		public void realRun() throws Exception {
719	<	ft.get(LONG_DELAY_MS,MILLISECONDS);
719	>	Thread.currentThread().interrupt();
720	>	try {
721	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
722	>	shouldThrow();
723	>	} catch (InterruptedException success) {}
724	>	assertFalse(Thread.interrupted());
725	>
726	>	pleaseInterrupt.countDown();
727	>	try {
728	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
729	>	shouldThrow();
730	>	} catch (InterruptedException success) {}
731	>	assertFalse(Thread.interrupted());
732		}});
733
734	<	t.start();
344	<	Thread.sleep(SHORT_DELAY_MS);
734	>	await(pleaseInterrupt);
735		t.interrupt();
736	<	t.join();
736	>	awaitTermination(t);
737	>	checkNotDone(task);
738		}
739
740		/**
741		* A timed out timed get throws TimeoutException
742		*/
743		public void testGet_TimeoutException() throws Exception {
744	+	FutureTask task = new FutureTask(new NoOpCallable());
745	+	long startTime = System.nanoTime();
746		try {
747	<	FutureTask ft = new FutureTask(new NoOpCallable());
355	<	ft.get(1,MILLISECONDS);
747	>	task.get(timeoutMillis(), MILLISECONDS);
748		shouldThrow();
749	<	} catch (TimeoutException success) {}
749	>	} catch (TimeoutException success) {
750	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
751	>	}
752	>	}
753	>
754	>	/**
755	>	* timed get with null TimeUnit throws NullPointerException
756	>	*/
757	>	public void testGet_NullTimeUnit() throws Exception {
758	>	FutureTask task = new FutureTask(new NoOpCallable());
759	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
760	>
761	>	for (long timeout : timeouts) {
762	>	try {
763	>	task.get(timeout, null);
764	>	shouldThrow();
765	>	} catch (NullPointerException success) {}
766	>	}
767	>
768	>	task.run();
769	>
770	>	for (long timeout : timeouts) {
771	>	try {
772	>	task.get(timeout, null);
773	>	shouldThrow();
774	>	} catch (NullPointerException success) {}
775	>	}
776		}
777
778		}

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