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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.18 by jsr166, Tue Dec 1 09:56:28 2009 UTC vs.
Revision 1.30 by jsr166, Sat Dec 15 21:48:32 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.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 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);
29		}
30
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	<	public PublicFutureTask(Callable r) { super(r); }
138	<	public boolean runAndReset() { return super.runAndReset(); }
139	<	public void set(Object x) { super.set(x); }
140	<	public void setException(Throwable t) { super.setException(t); }
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 NPE
203	>	* creating a future with a null callable throws NullPointerException
204		*/
205		public void testConstructor() {
206		try {
207	<	FutureTask task = new FutureTask(null);
207	>	new FutureTask(null);
208		shouldThrow();
209		} catch (NullPointerException success) {}
210		}
211
212		/**
213	<	* creating a future with null runnable fails
213	>	* creating a future with null runnable throws NullPointerException
214		*/
215		public void testConstructor2() {
216		try {
217	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
217	>	new FutureTask(null, Boolean.TRUE);
218		shouldThrow();
219		} catch (NullPointerException success) {}
220		}
#	Line 54 | Line 223 | public class FutureTaskTest extends JSR1
223		* isDone is true when a task completes
224		*/
225		public void testIsDone() {
226	<	FutureTask task = new FutureTask(new NoOpCallable());
226	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
227	>	assertFalse(task.isDone());
228		task.run();
229		assertTrue(task.isDone());
230	<	assertFalse(task.isCancelled());
230	>	checkCompletedNormally(task, Boolean.TRUE);
231	>	assertEquals(1, task.runCount());
232		}
233
234		/**
#	Line 65 | Line 236 | public class FutureTaskTest extends JSR1
236		*/
237		public void testRunAndReset() {
238		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
239	<	assertTrue(task.runAndReset());
240	<	assertFalse(task.isDone());
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 testResetAfterCancel() {
253	<	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
254	<	assertTrue(task.cancel(false));
255	<	assertFalse(task.runAndReset());
256	<	assertTrue(task.isDone());
257	<	assertTrue(task.isCancelled());
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
83	–
84	–
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	<	assertSame(task.get(), 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() throws Exception {
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	<	Object x = task.get();
301	>	task.get(LONG_DELAY_MS, MILLISECONDS);
302		shouldThrow();
303		} catch (ExecutionException success) {
304	<	assertSame(success.getCause(), nse);
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	<	*  Cancelling before running succeeds
316	>	* cancel(false) before run succeeds
317		*/
318		public void testCancelBeforeRun() {
319	<	FutureTask task = new FutureTask(new NoOpCallable());
319	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
320		assertTrue(task.cancel(false));
321		task.run();
322	<	assertTrue(task.isDone());
323	<	assertTrue(task.isCancelled());
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
330	>	* cancel(true) before run succeeds
331		*/
332		public void testCancelBeforeRun2() {
333	<	FutureTask task = new FutureTask(new NoOpCallable());
333	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
334		assertTrue(task.cancel(true));
335		task.run();
336	<	assertTrue(task.isDone());
337	<	assertTrue(task.isCancelled());
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 of a completed task fails
344	>	* cancel(false) of a completed task fails
345		*/
346		public void testCancelAfterRun() {
347	<	FutureTask task = new FutureTask(new NoOpCallable());
347	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
348		task.run();
349		assertFalse(task.cancel(false));
350	<	assertTrue(task.isDone());
351	<	assertFalse(task.isCancelled());
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) interrupts a running task
358	>	* cancel(true) of a completed task fails
359		*/
360	<	public void testCancelInterrupt() throws InterruptedException {
361	<	final FutureTask task =
362	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
363	<	public Object realCall() throws InterruptedException {
364	<	Thread.sleep(SMALL_DELAY_MS);
365	<	return Boolean.TRUE;
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	<	Thread t = new Thread(task);
387	<	t.start();
155	<	Thread.sleep(SHORT_DELAY_MS);
386	>	Thread t = newStartedThread(task);
387	>	await(pleaseCancel);
388		assertTrue(task.cancel(true));
157	–	t.join();
158	–	assertTrue(task.isDone());
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	+	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() throws InterruptedException {
428	<	final FutureTask task =
429	<	new FutureTask(new CheckedCallable<Object>() {
430	<	public Object realCall() throws InterruptedException {
431	<	Thread.sleep(MEDIUM_DELAY_MS);
427	>	public void testCancelNoInterrupt() {
428	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
429	>	final CountDownLatch cancelled = new CountDownLatch(1);
430	>	final PublicFutureTask task =
431	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
432	>	public Boolean realCall() {
433	>	pleaseCancel.countDown();
434	>	await(cancelled);
435	>	assertFalse(Thread.interrupted());
436		return Boolean.TRUE;
437		}});
438
439	<	Thread t = new Thread(task);
440	<	t.start();
176	<	Thread.sleep(SHORT_DELAY_MS);
439	>	Thread t = newStartedThread(task);
440	>	await(pleaseCancel);
441		assertTrue(task.cancel(false));
178	–	t.join();
179	–	assertTrue(task.isDone());
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	<	* set in one thread causes get in another thread to retrieve value
453	>	* run in one thread causes get in another thread to retrieve value
454		*/
455	<	public void testGet1() throws InterruptedException {
456	<	final FutureTask ft =
457	<	new FutureTask(new CheckedCallable<Object>() {
458	<	public Object realCall() throws InterruptedException {
459	<	return Boolean.TRUE;
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	<	Thread t = new Thread(new CheckedRunnable() {
463	>
464	>	Thread t1 = newStartedThread(new CheckedRunnable() {
465		public void realRun() throws Exception {
466	<	assertSame(Boolean.TRUE, ft.get());
466	>	pleaseRun.countDown();
467	>	assertSame(two, task.get());
468		}});
469
470	<	assertFalse(ft.isDone());
198	<	assertFalse(ft.isCancelled());
199	<	t.start();
200	<	Thread.sleep(SHORT_DELAY_MS);
201	<	ft.run();
202	<	t.join();
203	<	assertTrue(ft.isDone());
204	<	assertFalse(ft.isCancelled());
205	<	}
206	<
207	<	/**
208	<	* set in one thread causes timed get in another thread to retrieve value
209	<	*/
210	<	public void testTimedGet1() throws InterruptedException {
211	<	final FutureTask ft =
212	<	new FutureTask(new CheckedCallable<Object>() {
213	<	public Object realCall() throws InterruptedException {
214	<	return Boolean.TRUE;
215	<	}});
216	<	Thread t = new Thread(new CheckedRunnable() {
470	>	Thread t2 = newStartedThread(new CheckedRunnable() {
471		public void realRun() throws Exception {
472	<	assertSame(Boolean.TRUE, ft.get(SMALL_DELAY_MS, MILLISECONDS));
472	>	pleaseRun.countDown();
473	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
474		}});
475
476	<	assertFalse(ft.isDone());
477	<	assertFalse(ft.isCancelled());
478	<	t.start();
479	<	Thread.sleep(SHORT_DELAY_MS);
480	<	ft.run();
481	<	t.join();
482	<	assertTrue(ft.isDone());
483	<	assertFalse(ft.isCancelled());
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	<	*  Cancelling a task causes timed get in another thread to throw CancellationException
493	<	*/
494	<	public void testTimedGet_Cancellation() throws InterruptedException {
495	<	final FutureTask ft =
496	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
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	<	Thread.sleep(SMALL_DELAY_MS);
239	<	return Boolean.TRUE;
500	>	return two;
501		}});
502
503	<	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
503	>	Thread t1 = newStartedThread(new CheckedRunnable() {
504		public void realRun() throws Exception {
505	<	ft.get(MEDIUM_DELAY_MS, MILLISECONDS);
506	<	}};
507	<	Thread t2 = new Thread(ft);
247	<	t1.start();
248	<	t2.start();
249	<	Thread.sleep(SHORT_DELAY_MS);
250	<	ft.cancel(true);
251	<	t1.join();
252	<	t2.join();
253	<	}
505	>	pleaseSet.countDown();
506	>	assertSame(two, task.get());
507	>	}});
508
509	<	/**
256	<	* Cancelling a task causes get in another thread to throw CancellationException
257	<	*/
258	<	public void testGet_Cancellation() throws InterruptedException {
259	<	final FutureTask ft =
260	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
261	<	public Object realCall() throws InterruptedException {
262	<	Thread.sleep(SMALL_DELAY_MS);
263	<	return Boolean.TRUE;
264	<	}});
265	<	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
509	>	Thread t2 = newStartedThread(new CheckedRunnable() {
510		public void realRun() throws Exception {
511	<	ft.get();
512	<	}};
511	>	pleaseSet.countDown();
512	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
513	>	}});
514
515	<	Thread t2 = new Thread(ft);
516	<	t1.start();
517	<	t2.start();
518	<	Thread.sleep(SHORT_DELAY_MS);
519	<	ft.cancel(true);
520	<	t1.join();
521	<	t2.join();
515	>	await(pleaseSet);
516	>	checkNotDone(task);
517	>	assertTrue(t1.isAlive());
518	>	assertTrue(t2.isAlive());
519	>	task.set(two);
520	>	assertEquals(0, task.runCount());
521	>	assertEquals(1, task.setCount());
522	>	assertEquals(0, task.setExceptionCount());
523	>	tryToConfuseDoneTask(task);
524	>	checkCompletedNormally(task, two);
525	>	awaitTermination(t1);
526	>	awaitTermination(t2);
527		}
528
529	+	/**
530	+	* Cancelling a task causes timed get in another thread to throw
531	+	* CancellationException
532	+	*/
533	+	public void testTimedGet_Cancellation() {
534	+	for (final boolean mayInterruptIfRunning :
535	+	new boolean[] { true, false }) {
536	+	final CountDownLatch pleaseCancel = new CountDownLatch(3);
537	+	final CountDownLatch cancelled = new CountDownLatch(1);
538	+	final PublicFutureTask task =
539	+	new PublicFutureTask(new CheckedCallable<Object>() {
540	+	public Object realCall() throws InterruptedException {
541	+	pleaseCancel.countDown();
542	+	if (mayInterruptIfRunning) {
543	+	try {
544	+	delay(2*LONG_DELAY_MS);
545	+	} catch (InterruptedException success) {}
546	+	} else {
547	+	await(cancelled);
548	+	}
549	+	return two;
550	+	}});
551	+
552	+	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
553	+	public void realRun() throws Exception {
554	+	pleaseCancel.countDown();
555	+	task.get();
556	+	}};
557	+	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
558	+	public void realRun() throws Exception {
559	+	pleaseCancel.countDown();
560	+	task.get(2*LONG_DELAY_MS, MILLISECONDS);
561	+	}};
562	+	t1.start();
563	+	t2.start();
564	+	Thread t3 = newStartedThread(task);
565	+	await(pleaseCancel);
566	+	checkIsRunning(task);
567	+	task.cancel(mayInterruptIfRunning);
568	+	checkCancelled(task);
569	+	awaitTermination(t1);
570	+	awaitTermination(t2);
571	+	cancelled.countDown();
572	+	awaitTermination(t3);
573	+	assertEquals(1, task.runCount());
574	+	assertEquals(1, task.setCount());
575	+	assertEquals(0, task.setExceptionCount());
576	+	tryToConfuseDoneTask(task);
577	+	checkCancelled(task);
578	+	}
579	+	}
580
581		/**
582		* A runtime exception in task causes get to throw ExecutionException
583		*/
584		public void testGet_ExecutionException() throws InterruptedException {
585	<	final FutureTask ft = new FutureTask(new Callable() {
585	>	final ArithmeticException e = new ArithmeticException();
586	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
587		public Object call() {
588	<	return 5/0;
588	>	throw e;
589		}});
590
591	<	ft.run();
591	>	task.run();
592	>	assertEquals(1, task.runCount());
593	>	assertEquals(0, task.setCount());
594	>	assertEquals(1, task.setExceptionCount());
595		try {
596	<	ft.get();
596	>	task.get();
597		shouldThrow();
598		} catch (ExecutionException success) {
599	<	assertTrue(success.getCause() instanceof ArithmeticException);
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
606	>	* A runtime exception in task causes timed get to throw ExecutionException
607		*/
608		public void testTimedGet_ExecutionException2() throws Exception {
609	<	final FutureTask ft = new FutureTask(new Callable() {
609	>	final ArithmeticException e = new ArithmeticException();
610	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
611		public Object call() {
612	<	return 5/0;
612	>	throw e;
613		}});
614
615	<	ft.run();
615	>	task.run();
616		try {
617	<	ft.get(SHORT_DELAY_MS, MILLISECONDS);
617	>	task.get(LONG_DELAY_MS, MILLISECONDS);
618		shouldThrow();
619		} catch (ExecutionException success) {
620	<	assertTrue(success.getCause() instanceof ArithmeticException);
620	>	assertSame(e, success.getCause());
621	>	tryToConfuseDoneTask(task);
622	>	checkCompletedAbnormally(task, success.getCause());
623		}
624		}
625
316	–
626		/**
627	<	* Interrupting a waiting get causes it to throw InterruptedException
627	>	* get is interruptible
628		*/
629	<	public void testGet_InterruptedException() throws InterruptedException {
630	<	final FutureTask ft = new FutureTask(new NoOpCallable());
631	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
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	<	ft.get();
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	<	t.start();
328	<	Thread.sleep(SHORT_DELAY_MS);
649	>	await(pleaseInterrupt);
650		t.interrupt();
651	<	t.join();
651	>	awaitTermination(t);
652	>	checkNotDone(task);
653		}
654
655		/**
656	<	*  Interrupting a waiting timed get causes it to throw InterruptedException
656	>	* timed get is interruptible
657		*/
658	<	public void testTimedGet_InterruptedException2() throws InterruptedException {
659	<	final FutureTask ft = new FutureTask(new NoOpCallable());
660	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
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	<	ft.get(LONG_DELAY_MS,MILLISECONDS);
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	<	t.start();
344	<	Thread.sleep(SHORT_DELAY_MS);
678	>	await(pleaseInterrupt);
679		t.interrupt();
680	<	t.join();
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	<	FutureTask ft = new FutureTask(new NoOpCallable());
355	<	ft.get(1,MILLISECONDS);
691	>	task.get(timeoutMillis(), MILLISECONDS);
692		shouldThrow();
693	<	} catch (TimeoutException success) {}
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
722		}

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