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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.17 by jsr166, Sat Nov 21 10:25:05 2009 UTC vs.
Revision 1.37 by jsr166, Sun Apr 21 06:54:11 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);
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);
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);
237	>	new FutureTask(null, Boolean.TRUE);
238		shouldThrow();
239		} catch (NullPointerException success) {}
240		}
#	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());
246	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
247	>	assertFalse(task.isDone());
248		task.run();
249		assertTrue(task.isDone());
250	<	assertFalse(task.isCancelled());
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	+	task.get();
314	+	shouldThrow();
315	+	} catch (ExecutionException success) {
316	+	assertSame(nse, success.getCause());
317	+	checkCompletedAbnormally(task, nse);
318	+	}
319	+
320		try {
321	<	Object x = task.get();
321	>	task.get(LONG_DELAY_MS, MILLISECONDS);
322		shouldThrow();
323		} catch (ExecutionException success) {
324	<	assertSame(success.getCause(), nse);
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());
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());
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());
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	+	shouldThrow();
485	+	} catch (Throwable t) {
486	+	assertTrue(t instanceof InterruptedException);
487	+	}
488	+	throw new RuntimeException();
489	+	}});
490	+
491	+	Thread t = newStartedThread(task);
492	+	await(pleaseCancel);
493	+	assertTrue(task.cancel(true));
494		assertTrue(task.isCancelled());
495	+	awaitTermination(t);
496	+	assertEquals(1, task.runCount());
497	+	assertEquals(0, task.setCount());
498	+	assertEquals(1, task.setExceptionCount());
499	+	tryToConfuseDoneTask(task);
500	+	checkCancelled(task);
501		}
502
503		/**
504	<	* set in one thread causes get in another thread to retrieve value
504	>	* cancel(false) does not interrupt a running task
505		*/
506	<	public void testGet1() throws InterruptedException {
507	<	final FutureTask ft =
508	<	new FutureTask(new CheckedCallable<Object>() {
509	<	public Object realCall() throws InterruptedException {
506	>	public void testCancelNoInterrupt() {
507	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
508	>	final CountDownLatch cancelled = new CountDownLatch(1);
509	>	final PublicFutureTask task =
510	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
511	>	public Boolean realCall() {
512	>	pleaseCancel.countDown();
513	>	await(cancelled);
514	>	assertFalse(Thread.interrupted());
515		return Boolean.TRUE;
516		}});
192	–	Thread t = new Thread(new CheckedRunnable() {
193	–	public void realRun() throws Exception {
194	–	assertSame(Boolean.TRUE, ft.get());
195	–	}});
517
518	<	assertFalse(ft.isDone());
519	<	assertFalse(ft.isCancelled());
520	<	t.start();
521	<	Thread.sleep(SHORT_DELAY_MS);
522	<	ft.run();
523	<	t.join();
524	<	assertTrue(ft.isDone());
525	<	assertFalse(ft.isCancelled());
518	>	Thread t = newStartedThread(task);
519	>	await(pleaseCancel);
520	>	assertTrue(task.cancel(false));
521	>	assertTrue(task.isCancelled());
522	>	cancelled.countDown();
523	>	awaitTermination(t);
524	>	assertEquals(1, task.runCount());
525	>	assertEquals(1, task.setCount());
526	>	assertEquals(0, task.setExceptionCount());
527	>	tryToConfuseDoneTask(task);
528	>	checkCancelled(task);
529		}
530
531		/**
532	<	* set in one thread causes timed get in another thread to retrieve value
532	>	* run in one thread causes get in another thread to retrieve value
533		*/
534	<	public void testTimedGet1() throws InterruptedException {
535	<	final FutureTask ft =
536	<	new FutureTask(new CheckedCallable<Object>() {
537	<	public Object realCall() throws InterruptedException {
538	<	return Boolean.TRUE;
534	>	public void testGetRun() {
535	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
536	>
537	>	final PublicFutureTask task =
538	>	new PublicFutureTask(new CheckedCallable<Object>() {
539	>	public Object realCall() {
540	>	return two;
541		}});
542	<	Thread t = new Thread(new CheckedRunnable() {
542	>
543	>	Thread t1 = newStartedThread(new CheckedRunnable() {
544		public void realRun() throws Exception {
545	<	assertSame(Boolean.TRUE, ft.get(SMALL_DELAY_MS, MILLISECONDS));
545	>	pleaseRun.countDown();
546	>	assertSame(two, task.get());
547		}});
548
549	<	assertFalse(ft.isDone());
550	<	assertFalse(ft.isCancelled());
551	<	t.start();
552	<	Thread.sleep(SHORT_DELAY_MS);
553	<	ft.run();
554	<	t.join();
555	<	assertTrue(ft.isDone());
556	<	assertFalse(ft.isCancelled());
549	>	Thread t2 = newStartedThread(new CheckedRunnable() {
550	>	public void realRun() throws Exception {
551	>	pleaseRun.countDown();
552	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
553	>	}});
554	>
555	>	await(pleaseRun);
556	>	checkNotDone(task);
557	>	assertTrue(t1.isAlive());
558	>	assertTrue(t2.isAlive());
559	>	task.run();
560	>	checkCompletedNormally(task, two);
561	>	assertEquals(1, task.runCount());
562	>	assertEquals(1, task.setCount());
563	>	assertEquals(0, task.setExceptionCount());
564	>	awaitTermination(t1);
565	>	awaitTermination(t2);
566	>	tryToConfuseDoneTask(task);
567	>	checkCompletedNormally(task, two);
568		}
569
570		/**
571	<	*  Cancelling a task causes timed get in another thread to throw CancellationException
571	>	* set in one thread causes get in another thread to retrieve value
572		*/
573	<	public void testTimedGet_Cancellation() throws InterruptedException {
574	<	final FutureTask ft =
575	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
573	>	public void testGetSet() {
574	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
575	>
576	>	final PublicFutureTask task =
577	>	new PublicFutureTask(new CheckedCallable<Object>() {
578		public Object realCall() throws InterruptedException {
579	<	Thread.sleep(SMALL_DELAY_MS);
239	<	return Boolean.TRUE;
579	>	return two;
580		}});
581
582	<	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
582	>	Thread t1 = newStartedThread(new CheckedRunnable() {
583		public void realRun() throws Exception {
584	<	ft.get(MEDIUM_DELAY_MS, MILLISECONDS);
585	<	}};
586	<	Thread t2 = new Thread(ft);
587	<	t1.start();
588	<	t2.start();
589	<	Thread.sleep(SHORT_DELAY_MS);
590	<	ft.cancel(true);
591	<	t1.join();
592	<	t2.join();
584	>	pleaseSet.countDown();
585	>	assertSame(two, task.get());
586	>	}});
587	>
588	>	Thread t2 = newStartedThread(new CheckedRunnable() {
589	>	public void realRun() throws Exception {
590	>	pleaseSet.countDown();
591	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
592	>	}});
593	>
594	>	await(pleaseSet);
595	>	checkNotDone(task);
596	>	assertTrue(t1.isAlive());
597	>	assertTrue(t2.isAlive());
598	>	task.set(two);
599	>	assertEquals(0, task.runCount());
600	>	assertEquals(1, task.setCount());
601	>	assertEquals(0, task.setExceptionCount());
602	>	tryToConfuseDoneTask(task);
603	>	checkCompletedNormally(task, two);
604	>	awaitTermination(t1);
605	>	awaitTermination(t2);
606		}
607
608		/**
609	<	* Cancelling a task causes get in another thread to throw CancellationException
610	<	*/
611	<	public void testGet_Cancellation() throws InterruptedException {
612	<	final FutureTask ft =
613	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
614	<	public Object realCall() throws InterruptedException {
615	<	Thread.sleep(SMALL_DELAY_MS);
616	<	return Boolean.TRUE;
617	<	}});
618	<	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
619	<	public void realRun() throws Exception {
620	<	ft.get();
609	>	* Cancelling a task causes timed get in another thread to throw
610	>	* CancellationException
611	>	*/
612	>	public void testTimedGet_Cancellation() {
613	>	testTimedGet_Cancellation(false);
614	>	}
615	>	public void testTimedGet_Cancellation_interrupt() {
616	>	testTimedGet_Cancellation(true);
617	>	}
618	>	public void testTimedGet_Cancellation(final boolean mayInterruptIfRunning) {
619	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
620	>	final CountDownLatch cancelled = new CountDownLatch(1);
621	>	final Callable<Object> callable =
622	>	new CheckedCallable<Object>() {
623	>	public Object realCall() throws InterruptedException {
624	>	pleaseCancel.countDown();
625	>	if (mayInterruptIfRunning) {
626	>	try {
627	>	delay(2*LONG_DELAY_MS);
628	>	} catch (InterruptedException success) {}
629	>	} else {
630	>	await(cancelled);
631	>	}
632	>	return two;
633		}};
634	+	final PublicFutureTask task = new PublicFutureTask(callable);
635
636	<	Thread t2 = new Thread(ft);
636	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
637	>	public void realRun() throws Exception {
638	>	pleaseCancel.countDown();
639	>	task.get();
640	>	}};
641	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
642	>	public void realRun() throws Exception {
643	>	pleaseCancel.countDown();
644	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
645	>	}};
646		t1.start();
647		t2.start();
648	<	Thread.sleep(SHORT_DELAY_MS);
649	<	ft.cancel(true);
650	<	t1.join();
651	<	t2.join();
648	>	Thread t3 = newStartedThread(task);
649	>	await(pleaseCancel);
650	>	checkIsRunning(task);
651	>	task.cancel(mayInterruptIfRunning);
652	>	checkCancelled(task);
653	>	awaitTermination(t1);
654	>	awaitTermination(t2);
655	>	cancelled.countDown();
656	>	awaitTermination(t3);
657	>	assertEquals(1, task.runCount());
658	>	assertEquals(1, task.setCount());
659	>	assertEquals(0, task.setExceptionCount());
660	>	tryToConfuseDoneTask(task);
661	>	checkCancelled(task);
662		}
663
279	–
664		/**
665		* A runtime exception in task causes get to throw ExecutionException
666		*/
667		public void testGet_ExecutionException() throws InterruptedException {
668	<	final FutureTask ft = new FutureTask(new Callable() {
668	>	final ArithmeticException e = new ArithmeticException();
669	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
670		public Object call() {
671	<	return 5/0;
671	>	throw e;
672		}});
673
674	<	ft.run();
674	>	task.run();
675	>	assertEquals(1, task.runCount());
676	>	assertEquals(0, task.setCount());
677	>	assertEquals(1, task.setExceptionCount());
678		try {
679	<	ft.get();
679	>	task.get();
680		shouldThrow();
681		} catch (ExecutionException success) {
682	<	assertTrue(success.getCause() instanceof ArithmeticException);
682	>	assertSame(e, success.getCause());
683	>	tryToConfuseDoneTask(task);
684	>	checkCompletedAbnormally(task, success.getCause());
685		}
686		}
687
688		/**
689	<	*  A runtime exception in task causes timed get to throw ExecutionException
689	>	* A runtime exception in task causes timed get to throw ExecutionException
690		*/
691		public void testTimedGet_ExecutionException2() throws Exception {
692	<	final FutureTask ft = new FutureTask(new Callable() {
692	>	final ArithmeticException e = new ArithmeticException();
693	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
694		public Object call() {
695	<	return 5/0;
695	>	throw e;
696		}});
697
698	<	ft.run();
698	>	task.run();
699		try {
700	<	ft.get(SHORT_DELAY_MS, MILLISECONDS);
700	>	task.get(LONG_DELAY_MS, MILLISECONDS);
701		shouldThrow();
702		} catch (ExecutionException success) {
703	<	assertTrue(success.getCause() instanceof ArithmeticException);
703	>	assertSame(e, success.getCause());
704	>	tryToConfuseDoneTask(task);
705	>	checkCompletedAbnormally(task, success.getCause());
706		}
707		}
708
316	–
709		/**
710	<	* Interrupting a waiting get causes it to throw InterruptedException
710	>	* get is interruptible
711		*/
712	<	public void testGet_InterruptedException() throws InterruptedException {
713	<	final FutureTask ft = new FutureTask(new NoOpCallable());
714	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
712	>	public void testGet_interruptible() {
713	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
714	>	final FutureTask task = new FutureTask(new NoOpCallable());
715	>	Thread t = newStartedThread(new CheckedRunnable() {
716		public void realRun() throws Exception {
717	<	ft.get();
717	>	Thread.currentThread().interrupt();
718	>	try {
719	>	task.get();
720	>	shouldThrow();
721	>	} catch (InterruptedException success) {}
722	>	assertFalse(Thread.interrupted());
723	>
724	>	pleaseInterrupt.countDown();
725	>	try {
726	>	task.get();
727	>	shouldThrow();
728	>	} catch (InterruptedException success) {}
729	>	assertFalse(Thread.interrupted());
730		}});
731
732	<	t.start();
328	<	Thread.sleep(SHORT_DELAY_MS);
732	>	await(pleaseInterrupt);
733		t.interrupt();
734	<	t.join();
734	>	awaitTermination(t);
735	>	checkNotDone(task);
736		}
737
738		/**
739	<	*  Interrupting a waiting timed get causes it to throw InterruptedException
739	>	* timed get is interruptible
740		*/
741	<	public void testTimedGet_InterruptedException2() throws InterruptedException {
742	<	final FutureTask ft = new FutureTask(new NoOpCallable());
743	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
741	>	public void testTimedGet_interruptible() {
742	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
743	>	final FutureTask task = new FutureTask(new NoOpCallable());
744	>	Thread t = newStartedThread(new CheckedRunnable() {
745		public void realRun() throws Exception {
746	<	ft.get(LONG_DELAY_MS,MILLISECONDS);
746	>	Thread.currentThread().interrupt();
747	>	try {
748	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
749	>	shouldThrow();
750	>	} catch (InterruptedException success) {}
751	>	assertFalse(Thread.interrupted());
752	>
753	>	pleaseInterrupt.countDown();
754	>	try {
755	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
756	>	shouldThrow();
757	>	} catch (InterruptedException success) {}
758	>	assertFalse(Thread.interrupted());
759		}});
760
761	<	t.start();
344	<	Thread.sleep(SHORT_DELAY_MS);
761	>	await(pleaseInterrupt);
762		t.interrupt();
763	<	t.join();
763	>	awaitTermination(t);
764	>	checkNotDone(task);
765		}
766
767		/**
768		* A timed out timed get throws TimeoutException
769		*/
770		public void testGet_TimeoutException() throws Exception {
771	+	FutureTask task = new FutureTask(new NoOpCallable());
772	+	long startTime = System.nanoTime();
773		try {
774	<	FutureTask ft = new FutureTask(new NoOpCallable());
355	<	ft.get(1,MILLISECONDS);
774	>	task.get(timeoutMillis(), MILLISECONDS);
775		shouldThrow();
776	<	} catch (TimeoutException success) {}
776	>	} catch (TimeoutException success) {
777	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
778	>	}
779	>	}
780	>
781	>	/**
782	>	* timed get with null TimeUnit throws NullPointerException
783	>	*/
784	>	public void testGet_NullTimeUnit() throws Exception {
785	>	FutureTask task = new FutureTask(new NoOpCallable());
786	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
787	>
788	>	for (long timeout : timeouts) {
789	>	try {
790	>	task.get(timeout, null);
791	>	shouldThrow();
792	>	} catch (NullPointerException success) {}
793	>	}
794	>
795	>	task.run();
796	>
797	>	for (long timeout : timeouts) {
798	>	try {
799	>	task.get(timeout, null);
800	>	shouldThrow();
801	>	} catch (NullPointerException success) {}
802	>	}
803		}
804
805		}

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