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Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.15 by jsr166, Fri Nov 20 00:58:01 2009 UTC vs.
Revision 1.35 by jsr166, Mon Jan 14 21:54:42 2013 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);
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);
208	<	shouldThrow("NullPointerException");
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);
218	<	shouldThrow("NullPointerException");
217	>	new FutureTask(null, Boolean.TRUE);
218	>	shouldThrow();
219		} catch (NullPointerException success) {}
220		}
221
#	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());
227	<	task.run();
228	<	assertTrue(task.isDone());
229	<	assertFalse(task.isCancelled());
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		/**
#	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	<	assertEquals(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	<	Object x = task.get();
294	<	shouldThrow("ExecutionException");
293	>	task.get();
294	>	shouldThrow();
295		} catch (ExecutionException success) {
296	<	assertSame(success.getCause(), nse);
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	<	*  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());
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
333	>	* cancel(true) before run succeeds
334		*/
335		public void testCancelBeforeRun2() {
336	<	FutureTask task = new FutureTask(new NoOpCallable());
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 of a completed task fails
350	>	* cancel(false) of a completed task fails
351		*/
352		public void testCancelAfterRun() {
353	<	FutureTask task = new FutureTask(new NoOpCallable());
354	<	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());
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) interrupts a running task
365	>	* cancel(true) of a completed task fails
366		*/
367	<	public void testCancelInterrupt() throws InterruptedException {
368	<	final FutureTask task =
369	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
370	<	public Object realCall() throws InterruptedException {
371	<	Thread.sleep(SMALL_DELAY_MS);
372	<	return Boolean.TRUE;
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	>	delay(LONG_DELAY_MS);
390	>	shouldThrow();
391	>	} catch (InterruptedException success) {}
392		}});
393
394	<	Thread t = new Thread(task);
395	<	t.start();
155	<	Thread.sleep(SHORT_DELAY_MS);
394	>	Thread t = newStartedThread(task);
395	>	await(pleaseCancel);
396		assertTrue(task.cancel(true));
157	–	t.join();
158	–	assertTrue(task.isDone());
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
162	–
407		/**
408	<	* cancel(false) does not interrupt a running task
409	<	*/
410	<	public void testCancelNoInterrupt() throws InterruptedException {
411	<	final FutureTask task =
412	<	new FutureTask(new CheckedCallable<Object>() {
413	<	public Object realCall() throws InterruptedException {
414	<	Thread.sleep(MEDIUM_DELAY_MS);
415	<	return Boolean.TRUE;
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	<	Thread t = new Thread(task);
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	<	Thread.sleep(SHORT_DELAY_MS);
431	<	assertTrue(task.cancel(false));
432	<	t.join();
430	>
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	+	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	<	* set in one thread causes get in another thread to retrieve value
484	>	* cancel(false) does not interrupt a running task
485		*/
486	<	public void testGet1() throws InterruptedException {
487	<	final FutureTask ft =
488	<	new FutureTask(new CheckedCallable<Object>() {
489	<	public Object realCall() throws InterruptedException {
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		}});
192	–	Thread t = new Thread(new CheckedRunnable() {
193	–	public void realRun() throws Exception {
194	–	assertSame(Boolean.TRUE, ft.get());
195	–	}});
497
498	<	assertFalse(ft.isDone());
499	<	assertFalse(ft.isCancelled());
500	<	t.start();
501	<	Thread.sleep(SHORT_DELAY_MS);
502	<	ft.run();
503	<	t.join();
504	<	assertTrue(ft.isDone());
505	<	assertFalse(ft.isCancelled());
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	<	* set in one thread causes timed get in another thread to retrieve value
512	>	* run in one thread causes get in another thread to retrieve value
513		*/
514	<	public void testTimedGet1() throws InterruptedException {
515	<	final FutureTask ft =
516	<	new FutureTask(new CheckedCallable<Object>() {
517	<	public Object realCall() throws InterruptedException {
518	<	return Boolean.TRUE;
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	<	Thread t = new Thread(new CheckedRunnable() {
522	>
523	>	Thread t1 = newStartedThread(new CheckedRunnable() {
524		public void realRun() throws Exception {
525	<	assertSame(Boolean.TRUE, ft.get(SMALL_DELAY_MS, MILLISECONDS));
525	>	pleaseRun.countDown();
526	>	assertSame(two, task.get());
527		}});
528
529	<	assertFalse(ft.isDone());
530	<	assertFalse(ft.isCancelled());
531	<	t.start();
532	<	Thread.sleep(SHORT_DELAY_MS);
533	<	ft.run();
534	<	t.join();
535	<	assertTrue(ft.isDone());
536	<	assertFalse(ft.isCancelled());
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	<	*  Cancelling a task causes timed get in another thread to throw CancellationException
552	<	*/
553	<	public void testTimedGet_Cancellation() throws InterruptedException {
554	<	final FutureTask ft =
555	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
556	<	public Object realCall() throws InterruptedException {
557	<	Thread.sleep(SMALL_DELAY_MS);
558	<	return Boolean.TRUE;
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 = new ThreadShouldThrow(CancellationException.class) {
562	>	Thread t1 = newStartedThread(new CheckedRunnable() {
563		public void realRun() throws Exception {
564	<	ft.get(MEDIUM_DELAY_MS, MILLISECONDS);
565	<	}};
566	<	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	<	}
564	>	pleaseSet.countDown();
565	>	assertSame(two, task.get());
566	>	}});
567
568	<	/**
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) {
568	>	Thread t2 = newStartedThread(new CheckedRunnable() {
569		public void realRun() throws Exception {
570	<	ft.get();
571	<	}};
570	>	pleaseSet.countDown();
571	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
572	>	}});
573
574	<	Thread t2 = new Thread(ft);
575	<	t1.start();
576	<	t2.start();
577	<	Thread.sleep(SHORT_DELAY_MS);
578	<	ft.cancel(true);
579	<	t1.join();
580	<	t2.join();
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		/**
641		* A runtime exception in task causes get to throw ExecutionException
642		*/
643		public void testGet_ExecutionException() throws InterruptedException {
644	<	final FutureTask ft = new FutureTask(new Callable() {
645	<	public Object call() {
646	<	return 5/0;
644	>	final ArithmeticException e = new ArithmeticException();
645	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
646	>	public Object call() {
647	>	throw e;
648		}});
649
650	<	ft.run();
650	>	task.run();
651	>	assertEquals(1, task.runCount());
652	>	assertEquals(0, task.setCount());
653	>	assertEquals(1, task.setExceptionCount());
654		try {
655	<	ft.get();
656	<	shouldThrow("ExecutionException");
657	<	} catch (ExecutionException success) {
658	<	assertTrue(success.getCause() instanceof ArithmeticException);
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
665	>	* A runtime exception in task causes timed get to throw ExecutionException
666		*/
667		public void testTimedGet_ExecutionException2() throws Exception {
668	<	final FutureTask ft = new FutureTask(new Callable() {
669	<	public Object call() {
670	<	return 5/0;
668	>	final ArithmeticException e = new ArithmeticException();
669	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
670	>	public Object call() {
671	>	throw e;
672		}});
673
674	<	ft.run();
675	<	try {
676	<	ft.get(SHORT_DELAY_MS, MILLISECONDS);
677	<	shouldThrow("ExecutionException");
678	<	} catch (ExecutionException success) {
679	<	assertTrue(success.getCause() instanceof ArithmeticException);
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
316	–
685		/**
686	<	* Interrupting a waiting get causes it to throw InterruptedException
686	>	* get is interruptible
687		*/
688	<	public void testGet_InterruptedException() throws InterruptedException {
689	<	final FutureTask ft = new FutureTask(new NoOpCallable());
690	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
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	<	ft.get();
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	<	t.start();
328	<	Thread.sleep(SHORT_DELAY_MS);
708	>	await(pleaseInterrupt);
709		t.interrupt();
710	<	t.join();
710	>	awaitTermination(t);
711	>	checkNotDone(task);
712		}
713
714		/**
715	<	*  Interrupting a waiting timed get causes it to throw InterruptedException
715	>	* timed get is interruptible
716		*/
717	<	public void testTimedGet_InterruptedException2() throws InterruptedException {
718	<	final FutureTask ft = new FutureTask(new NoOpCallable());
719	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
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	<	ft.get(LONG_DELAY_MS,MILLISECONDS);
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	<	t.start();
344	<	Thread.sleep(SHORT_DELAY_MS);
737	>	await(pleaseInterrupt);
738		t.interrupt();
739	<	t.join();
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	<	try {
748	<	FutureTask ft = new FutureTask(new NoOpCallable());
749	<	ft.get(1,MILLISECONDS);
750	<	shouldThrow("TimeoutException");
751	<	} catch (TimeoutException success) {}
747	>	FutureTask task = new FutureTask(new NoOpCallable());
748	>	long startTime = System.nanoTime();
749	>	try {
750	>	task.get(timeoutMillis(), MILLISECONDS);
751	>	shouldThrow();
752	>	} catch (TimeoutException success) {
753	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
754	>	}
755	>	}
756	>
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
781		}

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