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Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.21 by jsr166, Sat Oct 9 19:30:35 2010 UTC vs.
Revision 1.46 by jsr166, Mon May 29 19:15:02 2017 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.*;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	<	import java.util.*;
10	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
11	>
12	>	import java.util.ArrayList;
13	>	import java.util.List;
14	>	import java.util.NoSuchElementException;
15	>	import java.util.concurrent.Callable;
16	>	import java.util.concurrent.CancellationException;
17	>	import java.util.concurrent.CountDownLatch;
18	>	import java.util.concurrent.ExecutionException;
19	>	import java.util.concurrent.Executors;
20	>	import java.util.concurrent.ExecutorService;
21	>	import java.util.concurrent.Future;
22	>	import java.util.concurrent.FutureTask;
23	>	import java.util.concurrent.TimeoutException;
24	>	import java.util.concurrent.atomic.AtomicInteger;
25	>
26	>	import junit.framework.Test;
27	>	import junit.framework.TestSuite;
28
29		public class FutureTaskTest extends JSR166TestCase {
30
31		public static void main(String[] args) {
32	<	junit.textui.TestRunner.run(suite());
32	>	main(suite(), args);
33		}
34		public static Test suite() {
35		return new TestSuite(FutureTaskTest.class);
36		}
37
38	+	void checkIsDone(Future<?> f) {
39	+	assertTrue(f.isDone());
40	+	assertFalse(f.cancel(false));
41	+	assertFalse(f.cancel(true));
42	+	if (f instanceof PublicFutureTask) {
43	+	PublicFutureTask pf = (PublicFutureTask) f;
44	+	assertEquals(1, pf.doneCount());
45	+	assertFalse(pf.runAndReset());
46	+	assertEquals(1, pf.doneCount());
47	+	Object r = null; Object exInfo = null;
48	+	try {
49	+	r = f.get();
50	+	} catch (CancellationException t) {
51	+	exInfo = CancellationException.class;
52	+	} catch (ExecutionException t) {
53	+	exInfo = t.getCause();
54	+	} catch (Throwable t) {
55	+	threadUnexpectedException(t);
56	+	}
57	+
58	+	// Check that run and runAndReset have no effect.
59	+	int savedRunCount = pf.runCount();
60	+	pf.run();
61	+	pf.runAndReset();
62	+	assertEquals(savedRunCount, pf.runCount());
63	+	try {
64	+	assertSame(r, f.get());
65	+	} catch (CancellationException t) {
66	+	assertSame(exInfo, CancellationException.class);
67	+	} catch (ExecutionException t) {
68	+	assertSame(exInfo, t.getCause());
69	+	} catch (Throwable t) {
70	+	threadUnexpectedException(t);
71	+	}
72	+	assertTrue(f.isDone());
73	+	}
74	+	}
75	+
76	+	void checkNotDone(Future<?> f) {
77	+	assertFalse(f.isDone());
78	+	assertFalse(f.isCancelled());
79	+	if (f instanceof PublicFutureTask) {
80	+	PublicFutureTask pf = (PublicFutureTask) f;
81	+	assertEquals(0, pf.doneCount());
82	+	assertEquals(0, pf.setCount());
83	+	assertEquals(0, pf.setExceptionCount());
84	+	}
85	+	}
86	+
87	+	void checkIsRunning(Future<?> f) {
88	+	checkNotDone(f);
89	+	if (f instanceof FutureTask) {
90	+	FutureTask ft = (FutureTask<?>) f;
91	+	// Check that run methods do nothing
92	+	ft.run();
93	+	if (f instanceof PublicFutureTask) {
94	+	PublicFutureTask pf = (PublicFutureTask) f;
95	+	int savedRunCount = pf.runCount();
96	+	pf.run();
97	+	assertFalse(pf.runAndReset());
98	+	assertEquals(savedRunCount, pf.runCount());
99	+	}
100	+	checkNotDone(f);
101	+	}
102	+	}
103	+
104	+	<T> void checkCompletedNormally(Future<T> f, T expected) {
105	+	checkIsDone(f);
106	+	assertFalse(f.isCancelled());
107	+
108	+	try {
109	+	assertSame(expected, f.get());
110	+	assertSame(expected, f.get(randomTimeout(), randomTimeUnit()));
111	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
112	+	}
113	+
114	+	void checkCancelled(Future<?> f) {
115	+	checkIsDone(f);
116	+	assertTrue(f.isCancelled());
117	+
118	+	try {
119	+	f.get();
120	+	shouldThrow();
121	+	} catch (CancellationException success) {
122	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
123	+
124	+	try {
125	+	f.get(randomTimeout(), randomTimeUnit());
126	+	shouldThrow();
127	+	} catch (CancellationException success) {
128	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
129	+	}
130	+
131	+	void tryToConfuseDoneTask(PublicFutureTask pf) {
132	+	pf.set(new Object());
133	+	pf.setException(new Error());
134	+	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
135	+	pf.cancel(mayInterruptIfRunning);
136	+	}
137	+	}
138	+
139	+	void checkCompletedAbnormally(Future<?> f, Throwable t) {
140	+	checkIsDone(f);
141	+	assertFalse(f.isCancelled());
142	+
143	+	try {
144	+	f.get();
145	+	shouldThrow();
146	+	} catch (ExecutionException success) {
147	+	assertSame(t, success.getCause());
148	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
149	+
150	+	try {
151	+	f.get(randomTimeout(), randomTimeUnit());
152	+	shouldThrow();
153	+	} catch (ExecutionException success) {
154	+	assertSame(t, success.getCause());
155	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
156	+	}
157	+
158		/**
159		* Subclass to expose protected methods
160		*/
161		static class PublicFutureTask extends FutureTask {
162	<	public PublicFutureTask(Callable r) { super(r); }
163	<	public boolean runAndReset() { return super.runAndReset(); }
164	<	public void set(Object x) { super.set(x); }
165	<	public void setException(Throwable t) { super.setException(t); }
162	>	private final AtomicInteger runCount;
163	>	private final AtomicInteger doneCount = new AtomicInteger(0);
164	>	private final AtomicInteger runAndResetCount = new AtomicInteger(0);
165	>	private final AtomicInteger setCount = new AtomicInteger(0);
166	>	private final AtomicInteger setExceptionCount = new AtomicInteger(0);
167	>	public int runCount() { return runCount.get(); }
168	>	public int doneCount() { return doneCount.get(); }
169	>	public int runAndResetCount() { return runAndResetCount.get(); }
170	>	public int setCount() { return setCount.get(); }
171	>	public int setExceptionCount() { return setExceptionCount.get(); }
172	>
173	>	PublicFutureTask(Runnable runnable) {
174	>	this(runnable, seven);
175	>	}
176	>	PublicFutureTask(Runnable runnable, Object result) {
177	>	this(runnable, result, new AtomicInteger(0));
178	>	}
179	>	private PublicFutureTask(final Runnable runnable, Object result,
180	>	final AtomicInteger runCount) {
181	>	super(new Runnable() {
182	>	public void run() {
183	>	runCount.getAndIncrement();
184	>	runnable.run();
185	>	}}, result);
186	>	this.runCount = runCount;
187	>	}
188	>	PublicFutureTask(Callable callable) {
189	>	this(callable, new AtomicInteger(0));
190	>	}
191	>	private PublicFutureTask(final Callable callable,
192	>	final AtomicInteger runCount) {
193	>	super(new Callable() {
194	>	public Object call() throws Exception {
195	>	runCount.getAndIncrement();
196	>	return callable.call();
197	>	}});
198	>	this.runCount = runCount;
199	>	}
200	>	@Override public void done() {
201	>	assertTrue(isDone());
202	>	doneCount.incrementAndGet();
203	>	super.done();
204	>	}
205	>	@Override public boolean runAndReset() {
206	>	runAndResetCount.incrementAndGet();
207	>	return super.runAndReset();
208	>	}
209	>	@Override public void set(Object x) {
210	>	setCount.incrementAndGet();
211	>	super.set(x);
212	>	}
213	>	@Override public void setException(Throwable t) {
214	>	setExceptionCount.incrementAndGet();
215	>	super.setException(t);
216	>	}
217	>	}
218	>
219	>	class Counter extends CheckedRunnable {
220	>	final AtomicInteger count = new AtomicInteger(0);
221	>	public int get() { return count.get(); }
222	>	public void realRun() {
223	>	count.getAndIncrement();
224	>	}
225		}
226
227		/**
228	<	* Creating a future with a null callable throws NPE
228	>	* creating a future with a null callable throws NullPointerException
229		*/
230		public void testConstructor() {
231		try {
232	<	FutureTask task = new FutureTask(null);
232	>	new FutureTask(null);
233		shouldThrow();
234		} catch (NullPointerException success) {}
235		}
236
237		/**
238	<	* creating a future with null runnable fails
238	>	* creating a future with null runnable throws NullPointerException
239		*/
240		public void testConstructor2() {
241		try {
242	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
242	>	new FutureTask(null, Boolean.TRUE);
243		shouldThrow();
244		} catch (NullPointerException success) {}
245		}
#	Line 54 | Line 248 | public class FutureTaskTest extends JSR1
248		* isDone is true when a task completes
249		*/
250		public void testIsDone() {
251	<	FutureTask task = new FutureTask(new NoOpCallable());
251	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
252	>	assertFalse(task.isDone());
253		task.run();
254		assertTrue(task.isDone());
255	<	assertFalse(task.isCancelled());
255	>	checkCompletedNormally(task, Boolean.TRUE);
256	>	assertEquals(1, task.runCount());
257		}
258
259		/**
#	Line 65 | Line 261 | public class FutureTaskTest extends JSR1
261		*/
262		public void testRunAndReset() {
263		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
264	<	assertTrue(task.runAndReset());
265	<	assertFalse(task.isDone());
264	>	for (int i = 0; i < 3; i++) {
265	>	assertTrue(task.runAndReset());
266	>	checkNotDone(task);
267	>	assertEquals(i + 1, task.runCount());
268	>	assertEquals(i + 1, task.runAndResetCount());
269	>	assertEquals(0, task.setCount());
270	>	assertEquals(0, task.setExceptionCount());
271	>	}
272		}
273
274		/**
275		* runAndReset after cancellation fails
276		*/
277	<	public void testResetAfterCancel() {
278	<	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
279	<	assertTrue(task.cancel(false));
280	<	assertFalse(task.runAndReset());
281	<	assertTrue(task.isDone());
282	<	assertTrue(task.isCancelled());
277	>	public void testRunAndResetAfterCancel() {
278	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
279	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
280	>	assertTrue(task.cancel(mayInterruptIfRunning));
281	>	for (int i = 0; i < 3; i++) {
282	>	assertFalse(task.runAndReset());
283	>	assertEquals(0, task.runCount());
284	>	assertEquals(i + 1, task.runAndResetCount());
285	>	assertEquals(0, task.setCount());
286	>	assertEquals(0, task.setExceptionCount());
287	>	}
288	>	tryToConfuseDoneTask(task);
289	>	checkCancelled(task);
290	>	}
291		}
292
83	–
84	–
293		/**
294		* setting value causes get to return it
295		*/
296		public void testSet() throws Exception {
297		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
298		task.set(one);
299	<	assertSame(task.get(), one);
299	>	for (int i = 0; i < 3; i++) {
300	>	assertSame(one, task.get());
301	>	assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS));
302	>	assertEquals(1, task.setCount());
303	>	}
304	>	tryToConfuseDoneTask(task);
305	>	checkCompletedNormally(task, one);
306	>	assertEquals(0, task.runCount());
307		}
308
309		/**
310		* setException causes get to throw ExecutionException
311		*/
312	<	public void testSetException() throws Exception {
312	>	public void testSetException_get() throws Exception {
313		Exception nse = new NoSuchElementException();
314		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
315		task.setException(nse);
316	+
317		try {
318	<	Object x = task.get();
318	>	task.get();
319		shouldThrow();
320		} catch (ExecutionException success) {
321	<	assertSame(success.getCause(), nse);
321	>	assertSame(nse, success.getCause());
322	>	checkCompletedAbnormally(task, nse);
323		}
324	+
325	+	try {
326	+	task.get(LONG_DELAY_MS, MILLISECONDS);
327	+	shouldThrow();
328	+	} catch (ExecutionException success) {
329	+	assertSame(nse, success.getCause());
330	+	checkCompletedAbnormally(task, nse);
331	+	}
332	+
333	+	assertEquals(1, task.setExceptionCount());
334	+	assertEquals(0, task.setCount());
335	+	tryToConfuseDoneTask(task);
336	+	checkCompletedAbnormally(task, nse);
337	+	assertEquals(0, task.runCount());
338		}
339
340		/**
341	<	* Cancelling before running succeeds
341	>	* cancel(false) before run succeeds
342		*/
343		public void testCancelBeforeRun() {
344	<	FutureTask task = new FutureTask(new NoOpCallable());
344	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
345		assertTrue(task.cancel(false));
346		task.run();
347	<	assertTrue(task.isDone());
347	>	assertEquals(0, task.runCount());
348	>	assertEquals(0, task.setCount());
349	>	assertEquals(0, task.setExceptionCount());
350		assertTrue(task.isCancelled());
351	+	assertTrue(task.isDone());
352	+	tryToConfuseDoneTask(task);
353	+	assertEquals(0, task.runCount());
354	+	checkCancelled(task);
355		}
356
357		/**
358	<	* Cancel(true) before run succeeds
358	>	* cancel(true) before run succeeds
359		*/
360		public void testCancelBeforeRun2() {
361	<	FutureTask task = new FutureTask(new NoOpCallable());
361	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
362		assertTrue(task.cancel(true));
363		task.run();
364	<	assertTrue(task.isDone());
364	>	assertEquals(0, task.runCount());
365	>	assertEquals(0, task.setCount());
366	>	assertEquals(0, task.setExceptionCount());
367		assertTrue(task.isCancelled());
368	+	assertTrue(task.isDone());
369	+	tryToConfuseDoneTask(task);
370	+	assertEquals(0, task.runCount());
371	+	checkCancelled(task);
372		}
373
374		/**
375	<	* cancel of a completed task fails
375	>	* cancel(false) of a completed task fails
376		*/
377		public void testCancelAfterRun() {
378	<	FutureTask task = new FutureTask(new NoOpCallable());
378	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
379		task.run();
380		assertFalse(task.cancel(false));
381	<	assertTrue(task.isDone());
382	<	assertFalse(task.isCancelled());
381	>	assertEquals(1, task.runCount());
382	>	assertEquals(1, task.setCount());
383	>	assertEquals(0, task.setExceptionCount());
384	>	tryToConfuseDoneTask(task);
385	>	checkCompletedNormally(task, Boolean.TRUE);
386	>	assertEquals(1, task.runCount());
387		}
388
389		/**
390	<	* cancel(true) interrupts a running task
390	>	* cancel(true) of a completed task fails
391		*/
392	<	public void testCancelInterrupt() throws InterruptedException {
393	<	final FutureTask task =
394	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
395	<	public Object realCall() throws InterruptedException {
396	<	Thread.sleep(SMALL_DELAY_MS);
397	<	return Boolean.TRUE;
392	>	public void testCancelAfterRun2() {
393	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
394	>	task.run();
395	>	assertFalse(task.cancel(true));
396	>	assertEquals(1, task.runCount());
397	>	assertEquals(1, task.setCount());
398	>	assertEquals(0, task.setExceptionCount());
399	>	tryToConfuseDoneTask(task);
400	>	checkCompletedNormally(task, Boolean.TRUE);
401	>	assertEquals(1, task.runCount());
402	>	}
403	>
404	>	/**
405	>	* cancel(true) interrupts a running task that subsequently succeeds
406	>	*/
407	>	public void testCancelInterrupt() {
408	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
409	>	final PublicFutureTask task =
410	>	new PublicFutureTask(new CheckedRunnable() {
411	>	public void realRun() {
412	>	pleaseCancel.countDown();
413	>	try {
414	>	delay(LONG_DELAY_MS);
415	>	shouldThrow();
416	>	} catch (InterruptedException success) {}
417	>	assertFalse(Thread.interrupted());
418		}});
419
420	<	Thread t = new Thread(task);
421	<	t.start();
155	<	Thread.sleep(SHORT_DELAY_MS);
420	>	Thread t = newStartedThread(task);
421	>	await(pleaseCancel);
422		assertTrue(task.cancel(true));
157	–	t.join();
158	–	assertTrue(task.isDone());
423		assertTrue(task.isCancelled());
424	+	assertTrue(task.isDone());
425	+	awaitTermination(t);
426	+	assertEquals(1, task.runCount());
427	+	assertEquals(1, task.setCount());
428	+	assertEquals(0, task.setExceptionCount());
429	+	tryToConfuseDoneTask(task);
430	+	checkCancelled(task);
431		}
432
162	–
433		/**
434	<	* cancel(false) does not interrupt a running task
435	<	*/
436	<	public void testCancelNoInterrupt() throws InterruptedException {
437	<	final FutureTask task =
438	<	new FutureTask(new CheckedCallable<Object>() {
439	<	public Object realCall() throws InterruptedException {
440	<	Thread.sleep(MEDIUM_DELAY_MS);
441	<	return Boolean.TRUE;
434	>	* cancel(true) tries to interrupt a running task, but
435	>	* Thread.interrupt throws (simulating a restrictive security
436	>	* manager)
437	>	*/
438	>	public void testCancelInterrupt_ThrowsSecurityException() {
439	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
440	>	final CountDownLatch cancelled = new CountDownLatch(1);
441	>	final PublicFutureTask task =
442	>	new PublicFutureTask(new CheckedRunnable() {
443	>	public void realRun() {
444	>	pleaseCancel.countDown();
445	>	await(cancelled);
446	>	assertFalse(Thread.interrupted());
447		}});
448
449	<	Thread t = new Thread(task);
449	>	final Thread t = new Thread(task) {
450	>	// Simulate a restrictive security manager.
451	>	@Override public void interrupt() {
452	>	throw new SecurityException();
453	>	}};
454	>	t.setDaemon(true);
455		t.start();
456	<	Thread.sleep(SHORT_DELAY_MS);
457	<	assertTrue(task.cancel(false));
458	<	t.join();
456	>
457	>	await(pleaseCancel);
458	>	try {
459	>	task.cancel(true);
460	>	shouldThrow();
461	>	} catch (SecurityException expected) {}
462	>
463	>	// We failed to deliver the interrupt, but the world retains
464	>	// its sanity, as if we had done task.cancel(false)
465	>	assertTrue(task.isCancelled());
466		assertTrue(task.isDone());
467	+	assertEquals(1, task.runCount());
468	+	assertEquals(1, task.doneCount());
469	+	assertEquals(0, task.setCount());
470	+	assertEquals(0, task.setExceptionCount());
471	+	cancelled.countDown();
472	+	awaitTermination(t);
473	+	assertEquals(1, task.setCount());
474	+	assertEquals(0, task.setExceptionCount());
475	+	tryToConfuseDoneTask(task);
476	+	checkCancelled(task);
477	+	}
478	+
479	+	/**
480	+	* cancel(true) interrupts a running task that subsequently throws
481	+	*/
482	+	public void testCancelInterrupt_taskFails() {
483	+	final CountDownLatch pleaseCancel = new CountDownLatch(1);
484	+	final PublicFutureTask task =
485	+	new PublicFutureTask(new Runnable() {
486	+	public void run() {
487	+	pleaseCancel.countDown();
488	+	try {
489	+	delay(LONG_DELAY_MS);
490	+	threadShouldThrow();
491	+	} catch (InterruptedException success) {
492	+	} catch (Throwable t) { threadUnexpectedException(t); }
493	+	throw new RuntimeException();
494	+	}});
495	+
496	+	Thread t = newStartedThread(task);
497	+	await(pleaseCancel);
498	+	assertTrue(task.cancel(true));
499		assertTrue(task.isCancelled());
500	+	awaitTermination(t);
501	+	assertEquals(1, task.runCount());
502	+	assertEquals(0, task.setCount());
503	+	assertEquals(1, task.setExceptionCount());
504	+	tryToConfuseDoneTask(task);
505	+	checkCancelled(task);
506		}
507
508		/**
509	<	* set in one thread causes get in another thread to retrieve value
509	>	* cancel(false) does not interrupt a running task
510		*/
511	<	public void testGet1() throws InterruptedException {
512	<	final FutureTask ft =
513	<	new FutureTask(new CheckedCallable<Object>() {
514	<	public Object realCall() throws InterruptedException {
511	>	public void testCancelNoInterrupt() {
512	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
513	>	final CountDownLatch cancelled = new CountDownLatch(1);
514	>	final PublicFutureTask task =
515	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
516	>	public Boolean realCall() {
517	>	pleaseCancel.countDown();
518	>	await(cancelled);
519	>	assertFalse(Thread.interrupted());
520		return Boolean.TRUE;
521		}});
192	–	Thread t = new Thread(new CheckedRunnable() {
193	–	public void realRun() throws Exception {
194	–	assertSame(Boolean.TRUE, ft.get());
195	–	}});
522
523	<	assertFalse(ft.isDone());
524	<	assertFalse(ft.isCancelled());
525	<	t.start();
526	<	Thread.sleep(SHORT_DELAY_MS);
527	<	ft.run();
528	<	t.join();
529	<	assertTrue(ft.isDone());
530	<	assertFalse(ft.isCancelled());
523	>	Thread t = newStartedThread(task);
524	>	await(pleaseCancel);
525	>	assertTrue(task.cancel(false));
526	>	assertTrue(task.isCancelled());
527	>	cancelled.countDown();
528	>	awaitTermination(t);
529	>	assertEquals(1, task.runCount());
530	>	assertEquals(1, task.setCount());
531	>	assertEquals(0, task.setExceptionCount());
532	>	tryToConfuseDoneTask(task);
533	>	checkCancelled(task);
534		}
535
536		/**
537	<	* set in one thread causes timed get in another thread to retrieve value
537	>	* run in one thread causes get in another thread to retrieve value
538		*/
539	<	public void testTimedGet1() throws InterruptedException {
540	<	final FutureTask ft =
541	<	new FutureTask(new CheckedCallable<Object>() {
542	<	public Object realCall() throws InterruptedException {
543	<	return Boolean.TRUE;
539	>	public void testGetRun() {
540	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
541	>
542	>	final PublicFutureTask task =
543	>	new PublicFutureTask(new CheckedCallable<Object>() {
544	>	public Object realCall() {
545	>	return two;
546		}});
547	<	Thread t = new Thread(new CheckedRunnable() {
547	>
548	>	Thread t1 = newStartedThread(new CheckedRunnable() {
549		public void realRun() throws Exception {
550	<	assertSame(Boolean.TRUE, ft.get(SMALL_DELAY_MS, MILLISECONDS));
550	>	pleaseRun.countDown();
551	>	assertSame(two, task.get());
552		}});
553
554	<	assertFalse(ft.isDone());
555	<	assertFalse(ft.isCancelled());
556	<	t.start();
557	<	Thread.sleep(SHORT_DELAY_MS);
558	<	ft.run();
559	<	t.join();
560	<	assertTrue(ft.isDone());
561	<	assertFalse(ft.isCancelled());
554	>	Thread t2 = newStartedThread(new CheckedRunnable() {
555	>	public void realRun() throws Exception {
556	>	pleaseRun.countDown();
557	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
558	>	}});
559	>
560	>	await(pleaseRun);
561	>	checkNotDone(task);
562	>	assertTrue(t1.isAlive());
563	>	assertTrue(t2.isAlive());
564	>	task.run();
565	>	checkCompletedNormally(task, two);
566	>	assertEquals(1, task.runCount());
567	>	assertEquals(1, task.setCount());
568	>	assertEquals(0, task.setExceptionCount());
569	>	awaitTermination(t1);
570	>	awaitTermination(t2);
571	>	tryToConfuseDoneTask(task);
572	>	checkCompletedNormally(task, two);
573		}
574
575		/**
576	<	* Cancelling a task causes timed get in another thread to throw
233	<	* CancellationException
576	>	* set in one thread causes get in another thread to retrieve value
577		*/
578	<	public void testTimedGet_Cancellation() throws InterruptedException {
579	<	final FutureTask ft =
580	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
578	>	public void testGetSet() {
579	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
580	>
581	>	final PublicFutureTask task =
582	>	new PublicFutureTask(new CheckedCallable<Object>() {
583		public Object realCall() throws InterruptedException {
584	<	Thread.sleep(SMALL_DELAY_MS);
240	<	return Boolean.TRUE;
584	>	return two;
585		}});
586
587	<	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
587	>	Thread t1 = newStartedThread(new CheckedRunnable() {
588		public void realRun() throws Exception {
589	<	ft.get(MEDIUM_DELAY_MS, MILLISECONDS);
590	<	}};
591	<	Thread t2 = new Thread(ft);
592	<	t1.start();
593	<	t2.start();
594	<	Thread.sleep(SHORT_DELAY_MS);
595	<	ft.cancel(true);
596	<	t1.join();
597	<	t2.join();
589	>	pleaseSet.countDown();
590	>	assertSame(two, task.get());
591	>	}});
592	>
593	>	Thread t2 = newStartedThread(new CheckedRunnable() {
594	>	public void realRun() throws Exception {
595	>	pleaseSet.countDown();
596	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
597	>	}});
598	>
599	>	await(pleaseSet);
600	>	checkNotDone(task);
601	>	assertTrue(t1.isAlive());
602	>	assertTrue(t2.isAlive());
603	>	task.set(two);
604	>	assertEquals(0, task.runCount());
605	>	assertEquals(1, task.setCount());
606	>	assertEquals(0, task.setExceptionCount());
607	>	tryToConfuseDoneTask(task);
608	>	checkCompletedNormally(task, two);
609	>	awaitTermination(t1);
610	>	awaitTermination(t2);
611		}
612
613		/**
614	<	* Cancelling a task causes get in another thread to throw
614	>	* Cancelling a task causes timed get in another thread to throw
615		* CancellationException
616		*/
617	<	public void testGet_Cancellation() throws InterruptedException {
618	<	final FutureTask ft =
619	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
620	<	public Object realCall() throws InterruptedException {
621	<	Thread.sleep(SMALL_DELAY_MS);
622	<	return Boolean.TRUE;
623	<	}});
624	<	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
625	<	public void realRun() throws Exception {
626	<	ft.get();
617	>	public void testTimedGet_Cancellation() {
618	>	testTimedGet_Cancellation(false);
619	>	}
620	>	public void testTimedGet_Cancellation_interrupt() {
621	>	testTimedGet_Cancellation(true);
622	>	}
623	>	public void testTimedGet_Cancellation(final boolean mayInterruptIfRunning) {
624	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
625	>	final CountDownLatch cancelled = new CountDownLatch(1);
626	>	final Callable<Object> callable =
627	>	new CheckedCallable<Object>() {
628	>	public Object realCall() throws InterruptedException {
629	>	pleaseCancel.countDown();
630	>	if (mayInterruptIfRunning) {
631	>	try {
632	>	delay(2*LONG_DELAY_MS);
633	>	} catch (InterruptedException success) {}
634	>	} else {
635	>	await(cancelled);
636	>	}
637	>	return two;
638		}};
639	+	final PublicFutureTask task = new PublicFutureTask(callable);
640
641	<	Thread t2 = new Thread(ft);
641	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
642	>	public void realRun() throws Exception {
643	>	pleaseCancel.countDown();
644	>	task.get();
645	>	}};
646	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
647	>	public void realRun() throws Exception {
648	>	pleaseCancel.countDown();
649	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
650	>	}};
651		t1.start();
652		t2.start();
653	<	Thread.sleep(SHORT_DELAY_MS);
654	<	ft.cancel(true);
655	<	t1.join();
656	<	t2.join();
653	>	Thread t3 = newStartedThread(task);
654	>	await(pleaseCancel);
655	>	checkIsRunning(task);
656	>	task.cancel(mayInterruptIfRunning);
657	>	checkCancelled(task);
658	>	awaitTermination(t1);
659	>	awaitTermination(t2);
660	>	cancelled.countDown();
661	>	awaitTermination(t3);
662	>	assertEquals(1, task.runCount());
663	>	assertEquals(1, task.setCount());
664	>	assertEquals(0, task.setExceptionCount());
665	>	tryToConfuseDoneTask(task);
666	>	checkCancelled(task);
667		}
668
281	–
669		/**
670		* A runtime exception in task causes get to throw ExecutionException
671		*/
672		public void testGet_ExecutionException() throws InterruptedException {
673	<	final FutureTask ft = new FutureTask(new Callable() {
673	>	final ArithmeticException e = new ArithmeticException();
674	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
675		public Object call() {
676	<	return 5/0;
676	>	throw e;
677		}});
678
679	<	ft.run();
679	>	task.run();
680	>	assertEquals(1, task.runCount());
681	>	assertEquals(0, task.setCount());
682	>	assertEquals(1, task.setExceptionCount());
683		try {
684	<	ft.get();
684	>	task.get();
685		shouldThrow();
686		} catch (ExecutionException success) {
687	<	assertTrue(success.getCause() instanceof ArithmeticException);
687	>	assertSame(e, success.getCause());
688	>	tryToConfuseDoneTask(task);
689	>	checkCompletedAbnormally(task, success.getCause());
690		}
691		}
692
#	Line 301 | Line 694 | public class FutureTaskTest extends JSR1
694		* A runtime exception in task causes timed get to throw ExecutionException
695		*/
696		public void testTimedGet_ExecutionException2() throws Exception {
697	<	final FutureTask ft = new FutureTask(new Callable() {
697	>	final ArithmeticException e = new ArithmeticException();
698	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
699		public Object call() {
700	<	return 5/0;
700	>	throw e;
701		}});
702
703	<	ft.run();
703	>	task.run();
704		try {
705	<	ft.get(SHORT_DELAY_MS, MILLISECONDS);
705	>	task.get(LONG_DELAY_MS, MILLISECONDS);
706		shouldThrow();
707		} catch (ExecutionException success) {
708	<	assertTrue(success.getCause() instanceof ArithmeticException);
708	>	assertSame(e, success.getCause());
709	>	tryToConfuseDoneTask(task);
710	>	checkCompletedAbnormally(task, success.getCause());
711		}
712		}
713
318	–
714		/**
715	<	* Interrupting a waiting get causes it to throw InterruptedException
715	>	* get is interruptible
716		*/
717	<	public void testGet_InterruptedException() throws InterruptedException {
718	<	final FutureTask ft = new FutureTask(new NoOpCallable());
719	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
717	>	public void testGet_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();
722	>	Thread.currentThread().interrupt();
723	>	try {
724	>	task.get();
725	>	shouldThrow();
726	>	} catch (InterruptedException success) {}
727	>	assertFalse(Thread.interrupted());
728	>
729	>	pleaseInterrupt.countDown();
730	>	try {
731	>	task.get();
732	>	shouldThrow();
733	>	} catch (InterruptedException success) {}
734	>	assertFalse(Thread.interrupted());
735		}});
736
737	<	t.start();
330	<	Thread.sleep(SHORT_DELAY_MS);
737	>	await(pleaseInterrupt);
738		t.interrupt();
739	<	t.join();
739	>	awaitTermination(t);
740	>	checkNotDone(task);
741		}
742
743		/**
744	<	* Interrupting a waiting timed get causes it to throw InterruptedException
744	>	* timed get is interruptible
745		*/
746	<	public void testTimedGet_InterruptedException2() throws InterruptedException {
747	<	final FutureTask ft = new FutureTask(new NoOpCallable());
748	<	Thread t = new Thread(new CheckedInterruptedRunnable() {
746	>	public void testTimedGet_interruptible() {
747	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
748	>	final FutureTask task = new FutureTask(new NoOpCallable());
749	>	Thread t = newStartedThread(new CheckedRunnable() {
750		public void realRun() throws Exception {
751	<	ft.get(LONG_DELAY_MS,MILLISECONDS);
751	>	Thread.currentThread().interrupt();
752	>	try {
753	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
754	>	shouldThrow();
755	>	} catch (InterruptedException success) {}
756	>	assertFalse(Thread.interrupted());
757	>
758	>	pleaseInterrupt.countDown();
759	>	try {
760	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
761	>	shouldThrow();
762	>	} catch (InterruptedException success) {}
763	>	assertFalse(Thread.interrupted());
764		}});
765
766	<	t.start();
346	<	Thread.sleep(SHORT_DELAY_MS);
766	>	await(pleaseInterrupt);
767		t.interrupt();
768	<	t.join();
768	>	awaitTermination(t);
769	>	checkNotDone(task);
770		}
771
772		/**
773		* A timed out timed get throws TimeoutException
774		*/
775		public void testGet_TimeoutException() throws Exception {
776	+	FutureTask task = new FutureTask(new NoOpCallable());
777	+	long startTime = System.nanoTime();
778		try {
779	<	FutureTask ft = new FutureTask(new NoOpCallable());
357	<	ft.get(1,MILLISECONDS);
779	>	task.get(timeoutMillis(), MILLISECONDS);
780		shouldThrow();
781	<	} catch (TimeoutException success) {}
781	>	} catch (TimeoutException success) {
782	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
783	>	}
784	>	}
785	>
786	>	/**
787	>	* timed get with null TimeUnit throws NullPointerException
788	>	*/
789	>	public void testGet_NullTimeUnit() throws Exception {
790	>	FutureTask task = new FutureTask(new NoOpCallable());
791	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
792	>
793	>	for (long timeout : timeouts) {
794	>	try {
795	>	task.get(timeout, null);
796	>	shouldThrow();
797	>	} catch (NullPointerException success) {}
798	>	}
799	>
800	>	task.run();
801	>
802	>	for (long timeout : timeouts) {
803	>	try {
804	>	task.get(timeout, null);
805	>	shouldThrow();
806	>	} catch (NullPointerException success) {}
807	>	}
808	>	}
809	>
810	>	/**
811	>	* timed get with most negative timeout works correctly (i.e. no
812	>	* underflow bug)
813	>	*/
814	>	public void testGet_NegativeInfinityTimeout() throws Exception {
815	>	final ExecutorService pool = Executors.newFixedThreadPool(10);
816	>	final Runnable nop = new Runnable() { public void run() {}};
817	>	final FutureTask<Void> task = new FutureTask<>(nop, null);
818	>	final List<Future<?>> futures = new ArrayList<>();
819	>	Runnable r = new Runnable() { public void run() {
820	>	for (long timeout : new long[] { 0L, -1L, Long.MIN_VALUE }) {
821	>	try {
822	>	task.get(timeout, NANOSECONDS);
823	>	shouldThrow();
824	>	} catch (TimeoutException success) {
825	>	} catch (Throwable fail) {threadUnexpectedException(fail);}}}};
826	>	for (int i = 0; i < 10; i++)
827	>	futures.add(pool.submit(r));
828	>	try {
829	>	joinPool(pool);
830	>	for (Future<?> future : futures)
831	>	checkCompletedNormally(future, null);
832	>	} finally {
833	>	task.run();         // last resort to help terminate
834	>	}
835		}
836
837		}

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