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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 1.38 by jsr166, Wed Jun 19 05:54:45 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	>	Object r = null; Object exInfo = null;
41	>	try {
42	>	r = f.get();
43	>	} catch (CancellationException t) {
44	>	exInfo = CancellationException.class;
45	>	} catch (ExecutionException t) {
46	>	exInfo = t.getCause();
47	>	} catch (Throwable t) {
48	>	threadUnexpectedException(t);
49	>	}
50	>
51	>	// Check that run and runAndReset have no effect.
52	>	int savedRunCount = pf.runCount();
53	>	pf.run();
54	>	pf.runAndReset();
55	>	assertEquals(savedRunCount, pf.runCount());
56	>	try {
57	>	assertSame(r, f.get());
58	>	} catch (CancellationException t) {
59	>	assertSame(exInfo, CancellationException.class);
60	>	} catch (ExecutionException t) {
61	>	assertSame(exInfo, t.getCause());
62	>	} catch (Throwable t) {
63	>	threadUnexpectedException(t);
64	>	}
65	>	assertTrue(f.isDone());
66	>	}
67	>	}
68	>
69	>	void checkNotDone(Future<?> f) {
70	>	assertFalse(f.isDone());
71	>	assertFalse(f.isCancelled());
72	>	if (f instanceof PublicFutureTask) {
73	>	PublicFutureTask pf = (PublicFutureTask) f;
74	>	assertEquals(0, pf.doneCount());
75	>	assertEquals(0, pf.setCount());
76	>	assertEquals(0, pf.setExceptionCount());
77	>	}
78	>	}
79	>
80	>	void checkIsRunning(Future<?> f) {
81	>	checkNotDone(f);
82	>	if (f instanceof FutureTask) {
83	>	FutureTask ft = (FutureTask<?>) f;
84	>	// Check that run methods do nothing
85	>	ft.run();
86	>	if (f instanceof PublicFutureTask) {
87	>	PublicFutureTask pf = (PublicFutureTask) f;
88	>	int savedRunCount = pf.runCount();
89	>	pf.run();
90	>	assertFalse(pf.runAndReset());
91	>	assertEquals(savedRunCount, pf.runCount());
92	>	}
93	>	checkNotDone(f);
94	>	}
95	>	}
96	>
97	>	<T> void checkCompletedNormally(Future<T> f, T expected) {
98	>	checkIsDone(f);
99	>	assertFalse(f.isCancelled());
100	>
101	>	try {
102	>	assertSame(expected, f.get());
103	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
104	>	try {
105	>	assertSame(expected, f.get(5L, SECONDS));
106	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
107	>	}
108	>
109	>	void checkCancelled(Future<?> f) {
110	>	checkIsDone(f);
111	>	assertTrue(f.isCancelled());
112	>
113	>	try {
114	>	f.get();
115	>	shouldThrow();
116	>	} catch (CancellationException success) {
117	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
118	>
119	>	try {
120	>	f.get(5L, SECONDS);
121	>	shouldThrow();
122	>	} catch (CancellationException success) {
123	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
124	>	}
125	>
126	>	void tryToConfuseDoneTask(PublicFutureTask pf) {
127	>	pf.set(new Object());
128	>	pf.setException(new Error());
129	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
130	>	pf.cancel(true);
131	>	}
132	>	}
133	>
134	>	void checkCompletedAbnormally(Future<?> f, Throwable t) {
135	>	checkIsDone(f);
136	>	assertFalse(f.isCancelled());
137	>
138	>	try {
139	>	f.get();
140	>	shouldThrow();
141	>	} catch (ExecutionException success) {
142	>	assertSame(t, success.getCause());
143	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
144	>
145	>	try {
146	>	f.get(5L, SECONDS);
147	>	shouldThrow();
148	>	} catch (ExecutionException success) {
149	>	assertSame(t, success.getCause());
150	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
151		}
152
153		/**
154		* Subclass to expose protected methods
155		*/
156		static class PublicFutureTask extends FutureTask {
157	<	public PublicFutureTask(Callable r) { super(r); }
158	<	public boolean runAndReset() { return super.runAndReset(); }
159	<	public void set(Object x) { super.set(x); }
160	<	public void setException(Throwable t) { super.setException(t); }
157	>	private final AtomicInteger runCount;
158	>	private final AtomicInteger doneCount = new AtomicInteger(0);
159	>	private final AtomicInteger runAndResetCount = new AtomicInteger(0);
160	>	private final AtomicInteger setCount = new AtomicInteger(0);
161	>	private final AtomicInteger setExceptionCount = new AtomicInteger(0);
162	>	public int runCount() { return runCount.get(); }
163	>	public int doneCount() { return doneCount.get(); }
164	>	public int runAndResetCount() { return runAndResetCount.get(); }
165	>	public int setCount() { return setCount.get(); }
166	>	public int setExceptionCount() { return setExceptionCount.get(); }
167	>
168	>	PublicFutureTask(Runnable runnable) {
169	>	this(runnable, seven);
170	>	}
171	>	PublicFutureTask(Runnable runnable, Object result) {
172	>	this(runnable, result, new AtomicInteger(0));
173	>	}
174	>	private PublicFutureTask(final Runnable runnable, Object result,
175	>	final AtomicInteger runCount) {
176	>	super(new Runnable() {
177	>	public void run() {
178	>	runCount.getAndIncrement();
179	>	runnable.run();
180	>	}}, result);
181	>	this.runCount = runCount;
182	>	}
183	>	PublicFutureTask(Callable callable) {
184	>	this(callable, new AtomicInteger(0));
185	>	}
186	>	private PublicFutureTask(final Callable callable,
187	>	final AtomicInteger runCount) {
188	>	super(new Callable() {
189	>	public Object call() throws Exception {
190	>	runCount.getAndIncrement();
191	>	return callable.call();
192	>	}});
193	>	this.runCount = runCount;
194	>	}
195	>	@Override public void done() {
196	>	assertTrue(isDone());
197	>	doneCount.incrementAndGet();
198	>	super.done();
199	>	}
200	>	@Override public boolean runAndReset() {
201	>	runAndResetCount.incrementAndGet();
202	>	return super.runAndReset();
203	>	}
204	>	@Override public void set(Object x) {
205	>	setCount.incrementAndGet();
206	>	super.set(x);
207	>	}
208	>	@Override public void setException(Throwable t) {
209	>	setExceptionCount.incrementAndGet();
210	>	super.setException(t);
211	>	}
212	>	}
213	>
214	>	class Counter extends CheckedRunnable {
215	>	final AtomicInteger count = new AtomicInteger(0);
216	>	public int get() { return count.get(); }
217	>	public void realRun() {
218	>	count.getAndIncrement();
219	>	}
220		}
221
222		/**
223	<	* Creating a future with a null callable throws NPE
223	>	* creating a future with a null callable throws NullPointerException
224		*/
225		public void testConstructor() {
226		try {
227	<	FutureTask task = new FutureTask(null);
228	<	shouldThrow("NullPointerException");
227	>	new FutureTask(null);
228	>	shouldThrow();
229		} catch (NullPointerException success) {}
230		}
231
232		/**
233	<	* creating a future with null runnable fails
233	>	* creating a future with null runnable throws NullPointerException
234		*/
235		public void testConstructor2() {
236		try {
237	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
238	<	shouldThrow("NullPointerException");
237	>	new FutureTask(null, Boolean.TRUE);
238	>	shouldThrow();
239		} catch (NullPointerException success) {}
240		}
241
#	Line 54 | Line 243 | public class FutureTaskTest extends JSR1
243		* isDone is true when a task completes
244		*/
245		public void testIsDone() {
246	<	FutureTask task = new FutureTask(new NoOpCallable());
247	<	task.run();
248	<	assertTrue(task.isDone());
249	<	assertFalse(task.isCancelled());
246	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
247	>	assertFalse(task.isDone());
248	>	task.run();
249	>	assertTrue(task.isDone());
250	>	checkCompletedNormally(task, Boolean.TRUE);
251	>	assertEquals(1, task.runCount());
252		}
253
254		/**
#	Line 65 | Line 256 | public class FutureTaskTest extends JSR1
256		*/
257		public void testRunAndReset() {
258		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
259	<	assertTrue(task.runAndReset());
260	<	assertFalse(task.isDone());
259	>	for (int i = 0; i < 3; i++) {
260	>	assertTrue(task.runAndReset());
261	>	checkNotDone(task);
262	>	assertEquals(i+1, task.runCount());
263	>	assertEquals(i+1, task.runAndResetCount());
264	>	assertEquals(0, task.setCount());
265	>	assertEquals(0, task.setExceptionCount());
266	>	}
267		}
268
269		/**
270		* runAndReset after cancellation fails
271		*/
272	<	public void testResetAfterCancel() {
273	<	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
274	<	assertTrue(task.cancel(false));
275	<	assertFalse(task.runAndReset());
276	<	assertTrue(task.isDone());
277	<	assertTrue(task.isCancelled());
272	>	public void testRunAndResetAfterCancel() {
273	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
274	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
275	>	assertTrue(task.cancel(mayInterruptIfRunning));
276	>	for (int i = 0; i < 3; i++) {
277	>	assertFalse(task.runAndReset());
278	>	assertEquals(0, task.runCount());
279	>	assertEquals(i+1, task.runAndResetCount());
280	>	assertEquals(0, task.setCount());
281	>	assertEquals(0, task.setExceptionCount());
282	>	}
283	>	tryToConfuseDoneTask(task);
284	>	checkCancelled(task);
285	>	}
286		}
287
83	–
84	–
288		/**
289		* setting value causes get to return it
290		*/
291		public void testSet() throws Exception {
292		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
293		task.set(one);
294	<	assertEquals(task.get(), one);
294	>	for (int i = 0; i < 3; i++) {
295	>	assertSame(one, task.get());
296	>	assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS));
297	>	assertEquals(1, task.setCount());
298	>	}
299	>	tryToConfuseDoneTask(task);
300	>	checkCompletedNormally(task, one);
301	>	assertEquals(0, task.runCount());
302		}
303
304		/**
305		* setException causes get to throw ExecutionException
306		*/
307	<	public void testSetException() throws Exception {
307	>	public void testSetException_get() throws Exception {
308		Exception nse = new NoSuchElementException();
309		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
310		task.setException(nse);
311	+
312		try {
313	<	Object x = task.get();
314	<	shouldThrow("ExecutionException");
313	>	task.get();
314	>	shouldThrow();
315		} catch (ExecutionException success) {
316	<	assertSame(success.getCause(), nse);
316	>	assertSame(nse, success.getCause());
317	>	checkCompletedAbnormally(task, nse);
318		}
319	+
320	+	try {
321	+	task.get(LONG_DELAY_MS, MILLISECONDS);
322	+	shouldThrow();
323	+	} catch (ExecutionException success) {
324	+	assertSame(nse, success.getCause());
325	+	checkCompletedAbnormally(task, nse);
326	+	}
327	+
328	+	assertEquals(1, task.setExceptionCount());
329	+	assertEquals(0, task.setCount());
330	+	tryToConfuseDoneTask(task);
331	+	checkCompletedAbnormally(task, nse);
332	+	assertEquals(0, task.runCount());
333		}
334
335		/**
336	<	*  Cancelling before running succeeds
336	>	* cancel(false) before run succeeds
337		*/
338		public void testCancelBeforeRun() {
339	<	FutureTask task = new FutureTask(new NoOpCallable());
339	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
340		assertTrue(task.cancel(false));
341	<	task.run();
342	<	assertTrue(task.isDone());
343	<	assertTrue(task.isCancelled());
341	>	task.run();
342	>	assertEquals(0, task.runCount());
343	>	assertEquals(0, task.setCount());
344	>	assertEquals(0, task.setExceptionCount());
345	>	assertTrue(task.isCancelled());
346	>	assertTrue(task.isDone());
347	>	tryToConfuseDoneTask(task);
348	>	assertEquals(0, task.runCount());
349	>	checkCancelled(task);
350		}
351
352		/**
353	<	* Cancel(true) before run succeeds
353	>	* cancel(true) before run succeeds
354		*/
355		public void testCancelBeforeRun2() {
356	<	FutureTask task = new FutureTask(new NoOpCallable());
356	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
357		assertTrue(task.cancel(true));
358	<	task.run();
359	<	assertTrue(task.isDone());
360	<	assertTrue(task.isCancelled());
358	>	task.run();
359	>	assertEquals(0, task.runCount());
360	>	assertEquals(0, task.setCount());
361	>	assertEquals(0, task.setExceptionCount());
362	>	assertTrue(task.isCancelled());
363	>	assertTrue(task.isDone());
364	>	tryToConfuseDoneTask(task);
365	>	assertEquals(0, task.runCount());
366	>	checkCancelled(task);
367		}
368
369		/**
370	<	* cancel of a completed task fails
370	>	* cancel(false) of a completed task fails
371		*/
372		public void testCancelAfterRun() {
373	<	FutureTask task = new FutureTask(new NoOpCallable());
374	<	task.run();
373	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
374	>	task.run();
375		assertFalse(task.cancel(false));
376	<	assertTrue(task.isDone());
377	<	assertFalse(task.isCancelled());
376	>	assertEquals(1, task.runCount());
377	>	assertEquals(1, task.setCount());
378	>	assertEquals(0, task.setExceptionCount());
379	>	tryToConfuseDoneTask(task);
380	>	checkCompletedNormally(task, Boolean.TRUE);
381	>	assertEquals(1, task.runCount());
382		}
383
384		/**
385	<	* cancel(true) interrupts a running task
385	>	* cancel(true) of a completed task fails
386		*/
387	<	public void testCancelInterrupt() throws InterruptedException {
388	<	final FutureTask task =
389	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
390	<	public Object realCall() throws InterruptedException {
391	<	Thread.sleep(SMALL_DELAY_MS);
392	<	return Boolean.TRUE;
387	>	public void testCancelAfterRun2() {
388	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
389	>	task.run();
390	>	assertFalse(task.cancel(true));
391	>	assertEquals(1, task.runCount());
392	>	assertEquals(1, task.setCount());
393	>	assertEquals(0, task.setExceptionCount());
394	>	tryToConfuseDoneTask(task);
395	>	checkCompletedNormally(task, Boolean.TRUE);
396	>	assertEquals(1, task.runCount());
397	>	}
398	>
399	>	/**
400	>	* cancel(true) interrupts a running task that subsequently succeeds
401	>	*/
402	>	public void testCancelInterrupt() {
403	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
404	>	final PublicFutureTask task =
405	>	new PublicFutureTask(new CheckedRunnable() {
406	>	public void realRun() {
407	>	pleaseCancel.countDown();
408	>	try {
409	>	delay(LONG_DELAY_MS);
410	>	shouldThrow();
411	>	} catch (InterruptedException success) {}
412		}});
413
414	<	Thread t = new Thread(task);
415	<	t.start();
155	<	Thread.sleep(SHORT_DELAY_MS);
414	>	Thread t = newStartedThread(task);
415	>	await(pleaseCancel);
416		assertTrue(task.cancel(true));
157	–	t.join();
158	–	assertTrue(task.isDone());
417		assertTrue(task.isCancelled());
418	+	assertTrue(task.isDone());
419	+	awaitTermination(t);
420	+	assertEquals(1, task.runCount());
421	+	assertEquals(1, task.setCount());
422	+	assertEquals(0, task.setExceptionCount());
423	+	tryToConfuseDoneTask(task);
424	+	checkCancelled(task);
425		}
426
162	–
427		/**
428	<	* cancel(false) does not interrupt a running task
429	<	*/
430	<	public void testCancelNoInterrupt() throws InterruptedException {
431	<	final FutureTask task =
432	<	new FutureTask(new CheckedCallable<Object>() {
433	<	public Object realCall() throws InterruptedException {
434	<	Thread.sleep(MEDIUM_DELAY_MS);
435	<	return Boolean.TRUE;
428	>	* cancel(true) tries to interrupt a running task, but
429	>	* Thread.interrupt throws (simulating a restrictive security
430	>	* manager)
431	>	*/
432	>	public void testCancelInterrupt_ThrowsSecurityException() {
433	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
434	>	final CountDownLatch cancelled = new CountDownLatch(1);
435	>	final PublicFutureTask task =
436	>	new PublicFutureTask(new CheckedRunnable() {
437	>	public void realRun() {
438	>	pleaseCancel.countDown();
439	>	await(cancelled);
440	>	assertFalse(Thread.interrupted());
441		}});
442
443	<	Thread t = new Thread(task);
443	>	final Thread t = new Thread(task) {
444	>	// Simulate a restrictive security manager.
445	>	@Override public void interrupt() {
446	>	throw new SecurityException();
447	>	}};
448	>	t.setDaemon(true);
449		t.start();
450	<	Thread.sleep(SHORT_DELAY_MS);
451	<	assertTrue(task.cancel(false));
452	<	t.join();
450	>
451	>	await(pleaseCancel);
452	>	try {
453	>	task.cancel(true);
454	>	shouldThrow();
455	>	} catch (SecurityException expected) {}
456	>
457	>	// We failed to deliver the interrupt, but the world retains
458	>	// its sanity, as if we had done task.cancel(false)
459	>	assertTrue(task.isCancelled());
460		assertTrue(task.isDone());
461	+	assertEquals(1, task.runCount());
462	+	assertEquals(1, task.doneCount());
463	+	assertEquals(0, task.setCount());
464	+	assertEquals(0, task.setExceptionCount());
465	+	cancelled.countDown();
466	+	awaitTermination(t);
467	+	assertEquals(1, task.setCount());
468	+	assertEquals(0, task.setExceptionCount());
469	+	tryToConfuseDoneTask(task);
470	+	checkCancelled(task);
471	+	}
472	+
473	+	/**
474	+	* cancel(true) interrupts a running task that subsequently throws
475	+	*/
476	+	public void testCancelInterrupt_taskFails() {
477	+	final CountDownLatch pleaseCancel = new CountDownLatch(1);
478	+	final PublicFutureTask task =
479	+	new PublicFutureTask(new Runnable() {
480	+	public void run() {
481	+	try {
482	+	pleaseCancel.countDown();
483	+	delay(LONG_DELAY_MS);
484	+	threadShouldThrow();
485	+	} catch (InterruptedException success) {
486	+	} catch (Throwable t) { threadUnexpectedException(t); }
487	+	throw new RuntimeException();
488	+	}});
489	+
490	+	Thread t = newStartedThread(task);
491	+	await(pleaseCancel);
492	+	assertTrue(task.cancel(true));
493		assertTrue(task.isCancelled());
494	+	awaitTermination(t);
495	+	assertEquals(1, task.runCount());
496	+	assertEquals(0, task.setCount());
497	+	assertEquals(1, task.setExceptionCount());
498	+	tryToConfuseDoneTask(task);
499	+	checkCancelled(task);
500		}
501
502		/**
503	<	* set in one thread causes get in another thread to retrieve value
503	>	* cancel(false) does not interrupt a running task
504		*/
505	<	public void testGet1() throws InterruptedException {
506	<	final FutureTask ft =
507	<	new FutureTask(new CheckedCallable<Object>() {
508	<	public Object realCall() throws InterruptedException {
505	>	public void testCancelNoInterrupt() {
506	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
507	>	final CountDownLatch cancelled = new CountDownLatch(1);
508	>	final PublicFutureTask task =
509	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
510	>	public Boolean realCall() {
511	>	pleaseCancel.countDown();
512	>	await(cancelled);
513	>	assertFalse(Thread.interrupted());
514		return Boolean.TRUE;
515		}});
192	–	Thread t = new Thread(new CheckedRunnable() {
193	–	public void realRun() throws Exception {
194	–	assertSame(Boolean.TRUE, ft.get());
195	–	}});
516
517	<	assertFalse(ft.isDone());
518	<	assertFalse(ft.isCancelled());
519	<	t.start();
520	<	Thread.sleep(SHORT_DELAY_MS);
521	<	ft.run();
522	<	t.join();
523	<	assertTrue(ft.isDone());
524	<	assertFalse(ft.isCancelled());
517	>	Thread t = newStartedThread(task);
518	>	await(pleaseCancel);
519	>	assertTrue(task.cancel(false));
520	>	assertTrue(task.isCancelled());
521	>	cancelled.countDown();
522	>	awaitTermination(t);
523	>	assertEquals(1, task.runCount());
524	>	assertEquals(1, task.setCount());
525	>	assertEquals(0, task.setExceptionCount());
526	>	tryToConfuseDoneTask(task);
527	>	checkCancelled(task);
528		}
529
530		/**
531	<	* set in one thread causes timed get in another thread to retrieve value
531	>	* run in one thread causes get in another thread to retrieve value
532		*/
533	<	public void testTimedGet1() throws InterruptedException {
534	<	final FutureTask ft =
535	<	new FutureTask(new CheckedCallable<Object>() {
536	<	public Object realCall() throws InterruptedException {
537	<	return Boolean.TRUE;
533	>	public void testGetRun() {
534	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
535	>
536	>	final PublicFutureTask task =
537	>	new PublicFutureTask(new CheckedCallable<Object>() {
538	>	public Object realCall() {
539	>	return two;
540		}});
541	<	Thread t = new Thread(new CheckedRunnable() {
541	>
542	>	Thread t1 = newStartedThread(new CheckedRunnable() {
543		public void realRun() throws Exception {
544	<	assertSame(Boolean.TRUE, ft.get(SMALL_DELAY_MS, MILLISECONDS));
544	>	pleaseRun.countDown();
545	>	assertSame(two, task.get());
546		}});
547
548	<	assertFalse(ft.isDone());
549	<	assertFalse(ft.isCancelled());
550	<	t.start();
551	<	Thread.sleep(SHORT_DELAY_MS);
552	<	ft.run();
553	<	t.join();
554	<	assertTrue(ft.isDone());
555	<	assertFalse(ft.isCancelled());
548	>	Thread t2 = newStartedThread(new CheckedRunnable() {
549	>	public void realRun() throws Exception {
550	>	pleaseRun.countDown();
551	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
552	>	}});
553	>
554	>	await(pleaseRun);
555	>	checkNotDone(task);
556	>	assertTrue(t1.isAlive());
557	>	assertTrue(t2.isAlive());
558	>	task.run();
559	>	checkCompletedNormally(task, two);
560	>	assertEquals(1, task.runCount());
561	>	assertEquals(1, task.setCount());
562	>	assertEquals(0, task.setExceptionCount());
563	>	awaitTermination(t1);
564	>	awaitTermination(t2);
565	>	tryToConfuseDoneTask(task);
566	>	checkCompletedNormally(task, two);
567		}
568
569		/**
570	<	*  Cancelling a task causes timed get in another thread to throw CancellationException
571	<	*/
572	<	public void testTimedGet_Cancellation() throws InterruptedException {
573	<	final FutureTask ft =
574	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
575	<	public Object realCall() throws InterruptedException {
576	<	Thread.sleep(SMALL_DELAY_MS);
577	<	return Boolean.TRUE;
570	>	* set in one thread causes get in another thread to retrieve value
571	>	*/
572	>	public void testGetSet() {
573	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
574	>
575	>	final PublicFutureTask task =
576	>	new PublicFutureTask(new CheckedCallable<Object>() {
577	>	public Object realCall() throws InterruptedException {
578	>	return two;
579		}});
580
581	<	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
581	>	Thread t1 = newStartedThread(new CheckedRunnable() {
582		public void realRun() throws Exception {
583	<	ft.get(MEDIUM_DELAY_MS, MILLISECONDS);
584	<	}};
585	<	Thread t2 = new Thread(ft);
586	<	t1.start();
587	<	t2.start();
588	<	Thread.sleep(SHORT_DELAY_MS);
589	<	ft.cancel(true);
590	<	t1.join();
591	<	t2.join();
583	>	pleaseSet.countDown();
584	>	assertSame(two, task.get());
585	>	}});
586	>
587	>	Thread t2 = newStartedThread(new CheckedRunnable() {
588	>	public void realRun() throws Exception {
589	>	pleaseSet.countDown();
590	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
591	>	}});
592	>
593	>	await(pleaseSet);
594	>	checkNotDone(task);
595	>	assertTrue(t1.isAlive());
596	>	assertTrue(t2.isAlive());
597	>	task.set(two);
598	>	assertEquals(0, task.runCount());
599	>	assertEquals(1, task.setCount());
600	>	assertEquals(0, task.setExceptionCount());
601	>	tryToConfuseDoneTask(task);
602	>	checkCompletedNormally(task, two);
603	>	awaitTermination(t1);
604	>	awaitTermination(t2);
605		}
606
607		/**
608	<	* Cancelling a task causes get in another thread to throw CancellationException
609	<	*/
610	<	public void testGet_Cancellation() throws InterruptedException {
611	<	final FutureTask ft =
612	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
613	<	public Object realCall() throws InterruptedException {
614	<	Thread.sleep(SMALL_DELAY_MS);
615	<	return Boolean.TRUE;
616	<	}});
617	<	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
618	<	public void realRun() throws Exception {
619	<	ft.get();
608	>	* Cancelling a task causes timed get in another thread to throw
609	>	* CancellationException
610	>	*/
611	>	public void testTimedGet_Cancellation() {
612	>	testTimedGet_Cancellation(false);
613	>	}
614	>	public void testTimedGet_Cancellation_interrupt() {
615	>	testTimedGet_Cancellation(true);
616	>	}
617	>	public void testTimedGet_Cancellation(final boolean mayInterruptIfRunning) {
618	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
619	>	final CountDownLatch cancelled = new CountDownLatch(1);
620	>	final Callable<Object> callable =
621	>	new CheckedCallable<Object>() {
622	>	public Object realCall() throws InterruptedException {
623	>	pleaseCancel.countDown();
624	>	if (mayInterruptIfRunning) {
625	>	try {
626	>	delay(2*LONG_DELAY_MS);
627	>	} catch (InterruptedException success) {}
628	>	} else {
629	>	await(cancelled);
630	>	}
631	>	return two;
632		}};
633	+	final PublicFutureTask task = new PublicFutureTask(callable);
634
635	<	Thread t2 = new Thread(ft);
635	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
636	>	public void realRun() throws Exception {
637	>	pleaseCancel.countDown();
638	>	task.get();
639	>	}};
640	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
641	>	public void realRun() throws Exception {
642	>	pleaseCancel.countDown();
643	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
644	>	}};
645		t1.start();
646		t2.start();
647	<	Thread.sleep(SHORT_DELAY_MS);
648	<	ft.cancel(true);
649	<	t1.join();
650	<	t2.join();
647	>	Thread t3 = newStartedThread(task);
648	>	await(pleaseCancel);
649	>	checkIsRunning(task);
650	>	task.cancel(mayInterruptIfRunning);
651	>	checkCancelled(task);
652	>	awaitTermination(t1);
653	>	awaitTermination(t2);
654	>	cancelled.countDown();
655	>	awaitTermination(t3);
656	>	assertEquals(1, task.runCount());
657	>	assertEquals(1, task.setCount());
658	>	assertEquals(0, task.setExceptionCount());
659	>	tryToConfuseDoneTask(task);
660	>	checkCancelled(task);
661		}
662
279	–
663		/**
664		* A runtime exception in task causes get to throw ExecutionException
665		*/
666		public void testGet_ExecutionException() throws InterruptedException {
667	<	final FutureTask ft = new FutureTask(new Callable() {
668	<	public Object call() {
669	<	return 5/0;
667	>	final ArithmeticException e = new ArithmeticException();
668	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
669	>	public Object call() {
670	>	throw e;
671		}});
672
673	<	ft.run();
673	>	task.run();
674	>	assertEquals(1, task.runCount());
675	>	assertEquals(0, task.setCount());
676	>	assertEquals(1, task.setExceptionCount());
677		try {
678	<	ft.get();
679	<	shouldThrow("ExecutionException");
680	<	} catch (ExecutionException success) {
681	<	assertTrue(success.getCause() instanceof ArithmeticException);
678	>	task.get();
679	>	shouldThrow();
680	>	} catch (ExecutionException success) {
681	>	assertSame(e, success.getCause());
682	>	tryToConfuseDoneTask(task);
683	>	checkCompletedAbnormally(task, success.getCause());
684		}
685		}
686
687		/**
688	<	*  A runtime exception in task causes timed get to throw ExecutionException
688	>	* A runtime exception in task causes timed get to throw ExecutionException
689		*/
690		public void testTimedGet_ExecutionException2() throws Exception {
691	<	final FutureTask ft = new FutureTask(new Callable() {
692	<	public Object call() {
693	<	return 5/0;
691	>	final ArithmeticException e = new ArithmeticException();
692	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
693	>	public Object call() {
694	>	throw e;
695		}});
696
697	<	ft.run();
698	<	try {
699	<	ft.get(SHORT_DELAY_MS, MILLISECONDS);
700	<	shouldThrow("ExecutionException");
701	<	} catch (ExecutionException success) {
702	<	assertTrue(success.getCause() instanceof ArithmeticException);
697	>	task.run();
698	>	try {
699	>	task.get(LONG_DELAY_MS, MILLISECONDS);
700	>	shouldThrow();
701	>	} catch (ExecutionException success) {
702	>	assertSame(e, success.getCause());
703	>	tryToConfuseDoneTask(task);
704	>	checkCompletedAbnormally(task, success.getCause());
705		}
706		}
707
316	–
708		/**
709	<	* Interrupting a waiting get causes it to throw InterruptedException
709	>	* get is interruptible
710		*/
711	<	public void testGet_InterruptedException() throws InterruptedException {
712	<	final FutureTask ft = new FutureTask(new NoOpCallable());
713	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
711	>	public void testGet_interruptible() {
712	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
713	>	final FutureTask task = new FutureTask(new NoOpCallable());
714	>	Thread t = newStartedThread(new CheckedRunnable() {
715		public void realRun() throws Exception {
716	<	ft.get();
716	>	Thread.currentThread().interrupt();
717	>	try {
718	>	task.get();
719	>	shouldThrow();
720	>	} catch (InterruptedException success) {}
721	>	assertFalse(Thread.interrupted());
722	>
723	>	pleaseInterrupt.countDown();
724	>	try {
725	>	task.get();
726	>	shouldThrow();
727	>	} catch (InterruptedException success) {}
728	>	assertFalse(Thread.interrupted());
729		}});
730
731	<	t.start();
328	<	Thread.sleep(SHORT_DELAY_MS);
731	>	await(pleaseInterrupt);
732		t.interrupt();
733	<	t.join();
733	>	awaitTermination(t);
734	>	checkNotDone(task);
735		}
736
737		/**
738	<	*  Interrupting a waiting timed get causes it to throw InterruptedException
738	>	* timed get is interruptible
739		*/
740	<	public void testTimedGet_InterruptedException2() throws InterruptedException {
741	<	final FutureTask ft = new FutureTask(new NoOpCallable());
742	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
740	>	public void testTimedGet_interruptible() {
741	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
742	>	final FutureTask task = new FutureTask(new NoOpCallable());
743	>	Thread t = newStartedThread(new CheckedRunnable() {
744		public void realRun() throws Exception {
745	<	ft.get(LONG_DELAY_MS,MILLISECONDS);
745	>	Thread.currentThread().interrupt();
746	>	try {
747	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
748	>	shouldThrow();
749	>	} catch (InterruptedException success) {}
750	>	assertFalse(Thread.interrupted());
751	>
752	>	pleaseInterrupt.countDown();
753	>	try {
754	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
755	>	shouldThrow();
756	>	} catch (InterruptedException success) {}
757	>	assertFalse(Thread.interrupted());
758		}});
759
760	<	t.start();
344	<	Thread.sleep(SHORT_DELAY_MS);
760	>	await(pleaseInterrupt);
761		t.interrupt();
762	<	t.join();
762	>	awaitTermination(t);
763	>	checkNotDone(task);
764		}
765
766		/**
767		* A timed out timed get throws TimeoutException
768		*/
769		public void testGet_TimeoutException() throws Exception {
770	<	try {
771	<	FutureTask ft = new FutureTask(new NoOpCallable());
772	<	ft.get(1,MILLISECONDS);
773	<	shouldThrow("TimeoutException");
774	<	} catch (TimeoutException success) {}
770	>	FutureTask task = new FutureTask(new NoOpCallable());
771	>	long startTime = System.nanoTime();
772	>	try {
773	>	task.get(timeoutMillis(), MILLISECONDS);
774	>	shouldThrow();
775	>	} catch (TimeoutException success) {
776	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
777	>	}
778	>	}
779	>
780	>	/**
781	>	* timed get with null TimeUnit throws NullPointerException
782	>	*/
783	>	public void testGet_NullTimeUnit() throws Exception {
784	>	FutureTask task = new FutureTask(new NoOpCallable());
785	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
786	>
787	>	for (long timeout : timeouts) {
788	>	try {
789	>	task.get(timeout, null);
790	>	shouldThrow();
791	>	} catch (NullPointerException success) {}
792	>	}
793	>
794	>	task.run();
795	>
796	>	for (long timeout : timeouts) {
797	>	try {
798	>	task.get(timeout, null);
799	>	shouldThrow();
800	>	} catch (NullPointerException success) {}
801	>	}
802		}
803
804		}

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