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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.25 by dl, Fri May 6 11:22:07 2011 UTC vs.
Revision 1.44 by jsr166, Sun May 24 01:42:14 2015 UTC

#	Line 6 | Line 6
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 static java.util.concurrent.TimeUnit.NANOSECONDS;
11		import static java.util.concurrent.TimeUnit.SECONDS;
12	<	import java.util.*;
12	>
13	>	import java.util.ArrayList;
14	>	import java.util.List;
15	>	import java.util.NoSuchElementException;
16	>	import java.util.concurrent.Callable;
17	>	import java.util.concurrent.CancellationException;
18	>	import java.util.concurrent.CountDownLatch;
19	>	import java.util.concurrent.ExecutionException;
20	>	import java.util.concurrent.Executors;
21	>	import java.util.concurrent.ExecutorService;
22	>	import java.util.concurrent.Future;
23	>	import java.util.concurrent.FutureTask;
24	>	import java.util.concurrent.TimeoutException;
25	>	import java.util.concurrent.atomic.AtomicInteger;
26	>
27	>	import junit.framework.Test;
28	>	import junit.framework.TestSuite;
29
30		public class FutureTaskTest extends JSR166TestCase {
31
32		public static void main(String[] args) {
33	<	junit.textui.TestRunner.run(suite());
33	>	main(suite(), args);
34		}
35		public static Test suite() {
36		return new TestSuite(FutureTaskTest.class);
37		}
38
39	+	void checkIsDone(Future<?> f) {
40	+	assertTrue(f.isDone());
41	+	assertFalse(f.cancel(false));
42	+	assertFalse(f.cancel(true));
43	+	if (f instanceof PublicFutureTask) {
44	+	PublicFutureTask pf = (PublicFutureTask) f;
45	+	assertEquals(1, pf.doneCount());
46	+	assertFalse(pf.runAndReset());
47	+	assertEquals(1, pf.doneCount());
48	+	Object r = null; Object exInfo = null;
49	+	try {
50	+	r = f.get();
51	+	} catch (CancellationException t) {
52	+	exInfo = CancellationException.class;
53	+	} catch (ExecutionException t) {
54	+	exInfo = t.getCause();
55	+	} catch (Throwable t) {
56	+	threadUnexpectedException(t);
57	+	}
58	+
59	+	// Check that run and runAndReset have no effect.
60	+	int savedRunCount = pf.runCount();
61	+	pf.run();
62	+	pf.runAndReset();
63	+	assertEquals(savedRunCount, pf.runCount());
64	+	try {
65	+	assertSame(r, f.get());
66	+	} catch (CancellationException t) {
67	+	assertSame(exInfo, CancellationException.class);
68	+	} catch (ExecutionException t) {
69	+	assertSame(exInfo, t.getCause());
70	+	} catch (Throwable t) {
71	+	threadUnexpectedException(t);
72	+	}
73	+	assertTrue(f.isDone());
74	+	}
75	+	}
76	+
77		void checkNotDone(Future<?> f) {
78		assertFalse(f.isDone());
79		assertFalse(f.isCancelled());
80	+	if (f instanceof PublicFutureTask) {
81	+	PublicFutureTask pf = (PublicFutureTask) f;
82	+	assertEquals(0, pf.doneCount());
83	+	assertEquals(0, pf.setCount());
84	+	assertEquals(0, pf.setExceptionCount());
85	+	}
86	+	}
87	+
88	+	void checkIsRunning(Future<?> f) {
89	+	checkNotDone(f);
90	+	if (f instanceof FutureTask) {
91	+	FutureTask ft = (FutureTask<?>) f;
92	+	// Check that run methods do nothing
93	+	ft.run();
94	+	if (f instanceof PublicFutureTask) {
95	+	PublicFutureTask pf = (PublicFutureTask) f;
96	+	int savedRunCount = pf.runCount();
97	+	pf.run();
98	+	assertFalse(pf.runAndReset());
99	+	assertEquals(savedRunCount, pf.runCount());
100	+	}
101	+	checkNotDone(f);
102	+	}
103		}
104
105		<T> void checkCompletedNormally(Future<T> f, T expected) {
106	<	assertTrue(f.isDone());
106	>	checkIsDone(f);
107		assertFalse(f.isCancelled());
108
109		try {
#	Line 36 | Line 112 | public class FutureTaskTest extends JSR1
112		try {
113		assertSame(expected, f.get(5L, SECONDS));
114		} catch (Throwable fail) { threadUnexpectedException(fail); }
39	–
40	–	assertFalse(f.cancel(false));
41	–	assertFalse(f.cancel(true));
115		}
116
117		void checkCancelled(Future<?> f) {
118	<	assertTrue(f.isDone());
118	>	checkIsDone(f);
119		assertTrue(f.isCancelled());
120
121		try {
#	Line 56 | Line 129 | public class FutureTaskTest extends JSR1
129		shouldThrow();
130		} catch (CancellationException success) {
131		} catch (Throwable fail) { threadUnexpectedException(fail); }
132	+	}
133
134	<	assertFalse(f.cancel(false));
135	<	assertFalse(f.cancel(true));
134	>	void tryToConfuseDoneTask(PublicFutureTask pf) {
135	>	pf.set(new Object());
136	>	pf.setException(new Error());
137	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
138	>	pf.cancel(mayInterruptIfRunning);
139	>	}
140		}
141
142		void checkCompletedAbnormally(Future<?> f, Throwable t) {
143	<	assertTrue(f.isDone());
143	>	checkIsDone(f);
144		assertFalse(f.isCancelled());
145
146		try {
#	Line 78 | Line 156 | public class FutureTaskTest extends JSR1
156		} catch (ExecutionException success) {
157		assertSame(t, success.getCause());
158		} catch (Throwable fail) { threadUnexpectedException(fail); }
81	–
82	–	assertFalse(f.cancel(false));
83	–	assertFalse(f.cancel(true));
159		}
160
161		/**
162		* Subclass to expose protected methods
163		*/
164		static class PublicFutureTask extends FutureTask {
165	<	public PublicFutureTask(Callable r) { super(r); }
166	<	public boolean runAndReset() { return super.runAndReset(); }
167	<	public void set(Object x) { super.set(x); }
168	<	public void setException(Throwable t) { super.setException(t); }
165	>	private final AtomicInteger runCount;
166	>	private final AtomicInteger doneCount = new AtomicInteger(0);
167	>	private final AtomicInteger runAndResetCount = new AtomicInteger(0);
168	>	private final AtomicInteger setCount = new AtomicInteger(0);
169	>	private final AtomicInteger setExceptionCount = new AtomicInteger(0);
170	>	public int runCount() { return runCount.get(); }
171	>	public int doneCount() { return doneCount.get(); }
172	>	public int runAndResetCount() { return runAndResetCount.get(); }
173	>	public int setCount() { return setCount.get(); }
174	>	public int setExceptionCount() { return setExceptionCount.get(); }
175	>
176	>	PublicFutureTask(Runnable runnable) {
177	>	this(runnable, seven);
178	>	}
179	>	PublicFutureTask(Runnable runnable, Object result) {
180	>	this(runnable, result, new AtomicInteger(0));
181	>	}
182	>	private PublicFutureTask(final Runnable runnable, Object result,
183	>	final AtomicInteger runCount) {
184	>	super(new Runnable() {
185	>	public void run() {
186	>	runCount.getAndIncrement();
187	>	runnable.run();
188	>	}}, result);
189	>	this.runCount = runCount;
190	>	}
191	>	PublicFutureTask(Callable callable) {
192	>	this(callable, new AtomicInteger(0));
193	>	}
194	>	private PublicFutureTask(final Callable callable,
195	>	final AtomicInteger runCount) {
196	>	super(new Callable() {
197	>	public Object call() throws Exception {
198	>	runCount.getAndIncrement();
199	>	return callable.call();
200	>	}});
201	>	this.runCount = runCount;
202	>	}
203	>	@Override public void done() {
204	>	assertTrue(isDone());
205	>	doneCount.incrementAndGet();
206	>	super.done();
207	>	}
208	>	@Override public boolean runAndReset() {
209	>	runAndResetCount.incrementAndGet();
210	>	return super.runAndReset();
211	>	}
212	>	@Override public void set(Object x) {
213	>	setCount.incrementAndGet();
214	>	super.set(x);
215	>	}
216	>	@Override public void setException(Throwable t) {
217	>	setExceptionCount.incrementAndGet();
218	>	super.setException(t);
219	>	}
220	>	}
221	>
222	>	class Counter extends CheckedRunnable {
223	>	final AtomicInteger count = new AtomicInteger(0);
224	>	public int get() { return count.get(); }
225	>	public void realRun() {
226	>	count.getAndIncrement();
227	>	}
228		}
229
230		/**
231	<	* Creating a future with a null callable throws NPE
231	>	* creating a future with a null callable throws NullPointerException
232		*/
233		public void testConstructor() {
234		try {
235	<	FutureTask task = new FutureTask(null);
235	>	new FutureTask(null);
236		shouldThrow();
237		} catch (NullPointerException success) {}
238		}
239
240		/**
241	<	* creating a future with null runnable fails
241	>	* creating a future with null runnable throws NullPointerException
242		*/
243		public void testConstructor2() {
244		try {
245	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
245	>	new FutureTask(null, Boolean.TRUE);
246		shouldThrow();
247		} catch (NullPointerException success) {}
248		}
#	Line 117 | Line 251 | public class FutureTaskTest extends JSR1
251		* isDone is true when a task completes
252		*/
253		public void testIsDone() {
254	<	FutureTask task = new FutureTask(new NoOpCallable());
254	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
255	>	assertFalse(task.isDone());
256		task.run();
257		assertTrue(task.isDone());
258		checkCompletedNormally(task, Boolean.TRUE);
259	+	assertEquals(1, task.runCount());
260		}
261
262		/**
#	Line 128 | Line 264 | public class FutureTaskTest extends JSR1
264		*/
265		public void testRunAndReset() {
266		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
267	<	assertTrue(task.runAndReset());
268	<	checkNotDone(task);
267	>	for (int i = 0; i < 3; i++) {
268	>	assertTrue(task.runAndReset());
269	>	checkNotDone(task);
270	>	assertEquals(i + 1, task.runCount());
271	>	assertEquals(i + 1, task.runAndResetCount());
272	>	assertEquals(0, task.setCount());
273	>	assertEquals(0, task.setExceptionCount());
274	>	}
275		}
276
277		/**
278		* runAndReset after cancellation fails
279		*/
280	<	public void testResetAfterCancel() {
281	<	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
282	<	assertTrue(task.cancel(false));
283	<	assertFalse(task.runAndReset());
284	<	checkCancelled(task);
280	>	public void testRunAndResetAfterCancel() {
281	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
282	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
283	>	assertTrue(task.cancel(mayInterruptIfRunning));
284	>	for (int i = 0; i < 3; i++) {
285	>	assertFalse(task.runAndReset());
286	>	assertEquals(0, task.runCount());
287	>	assertEquals(i + 1, task.runAndResetCount());
288	>	assertEquals(0, task.setCount());
289	>	assertEquals(0, task.setExceptionCount());
290	>	}
291	>	tryToConfuseDoneTask(task);
292	>	checkCancelled(task);
293	>	}
294		}
295
145	–
296		/**
297		* setting value causes get to return it
298		*/
299		public void testSet() throws Exception {
300		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
301		task.set(one);
302	<	assertSame(task.get(), one);
302	>	for (int i = 0; i < 3; i++) {
303	>	assertSame(one, task.get());
304	>	assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS));
305	>	assertEquals(1, task.setCount());
306	>	}
307	>	tryToConfuseDoneTask(task);
308		checkCompletedNormally(task, one);
309	+	assertEquals(0, task.runCount());
310		}
311
312		/**
313		* setException causes get to throw ExecutionException
314		*/
315	<	public void testSetException() throws Exception {
315	>	public void testSetException_get() throws Exception {
316		Exception nse = new NoSuchElementException();
317		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
318		task.setException(nse);
319	+
320	+	try {
321	+	task.get();
322	+	shouldThrow();
323	+	} catch (ExecutionException success) {
324	+	assertSame(nse, success.getCause());
325	+	checkCompletedAbnormally(task, nse);
326	+	}
327	+
328		try {
329	<	Object x = task.get();
329	>	task.get(LONG_DELAY_MS, MILLISECONDS);
330		shouldThrow();
331		} catch (ExecutionException success) {
332	<	assertSame(success.getCause(), nse);
332	>	assertSame(nse, success.getCause());
333		checkCompletedAbnormally(task, nse);
334		}
335	+
336	+	assertEquals(1, task.setExceptionCount());
337	+	assertEquals(0, task.setCount());
338	+	tryToConfuseDoneTask(task);
339	+	checkCompletedAbnormally(task, nse);
340	+	assertEquals(0, task.runCount());
341		}
342
343		/**
344	<	* Cancelling before running succeeds
344	>	* cancel(false) before run succeeds
345		*/
346		public void testCancelBeforeRun() {
347	<	FutureTask task = new FutureTask(new NoOpCallable());
347	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
348		assertTrue(task.cancel(false));
349		task.run();
350	+	assertEquals(0, task.runCount());
351	+	assertEquals(0, task.setCount());
352	+	assertEquals(0, task.setExceptionCount());
353	+	assertTrue(task.isCancelled());
354	+	assertTrue(task.isDone());
355	+	tryToConfuseDoneTask(task);
356	+	assertEquals(0, task.runCount());
357		checkCancelled(task);
358		}
359
360		/**
361	<	* Cancel(true) before run succeeds
361	>	* cancel(true) before run succeeds
362		*/
363		public void testCancelBeforeRun2() {
364	<	FutureTask task = new FutureTask(new NoOpCallable());
364	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
365		assertTrue(task.cancel(true));
366		task.run();
367	+	assertEquals(0, task.runCount());
368	+	assertEquals(0, task.setCount());
369	+	assertEquals(0, task.setExceptionCount());
370	+	assertTrue(task.isCancelled());
371	+	assertTrue(task.isDone());
372	+	tryToConfuseDoneTask(task);
373	+	assertEquals(0, task.runCount());
374		checkCancelled(task);
375		}
376
377		/**
378	<	* cancel of a completed task fails
378	>	* cancel(false) of a completed task fails
379		*/
380		public void testCancelAfterRun() {
381	<	FutureTask task = new FutureTask(new NoOpCallable());
381	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
382		task.run();
383		assertFalse(task.cancel(false));
384	+	assertEquals(1, task.runCount());
385	+	assertEquals(1, task.setCount());
386	+	assertEquals(0, task.setExceptionCount());
387	+	tryToConfuseDoneTask(task);
388		checkCompletedNormally(task, Boolean.TRUE);
389	+	assertEquals(1, task.runCount());
390		}
391
392		/**
393	<	* cancel(true) interrupts a running task
393	>	* cancel(true) of a completed task fails
394		*/
395	<	public void testCancelInterrupt() throws InterruptedException {
396	<	final CountDownLatch threadStarted = new CountDownLatch(1);
397	<	final FutureTask task =
398	<	new FutureTask(new CheckedCallable<Object>() {
399	<	public Object realCall() {
400	<	threadStarted.countDown();
401	<	long t0 = System.nanoTime();
402	<	for (;;) {
403	<	if (Thread.interrupted())
404	<	return Boolean.TRUE;
405	<	if (millisElapsedSince(t0) > MEDIUM_DELAY_MS)
406	<	fail("interrupt not delivered");
407	<	Thread.yield();
408	<	}
395	>	public void testCancelAfterRun2() {
396	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
397	>	task.run();
398	>	assertFalse(task.cancel(true));
399	>	assertEquals(1, task.runCount());
400	>	assertEquals(1, task.setCount());
401	>	assertEquals(0, task.setExceptionCount());
402	>	tryToConfuseDoneTask(task);
403	>	checkCompletedNormally(task, Boolean.TRUE);
404	>	assertEquals(1, task.runCount());
405	>	}
406	>
407	>	/**
408	>	* cancel(true) interrupts a running task that subsequently succeeds
409	>	*/
410	>	public void testCancelInterrupt() {
411	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
412	>	final PublicFutureTask task =
413	>	new PublicFutureTask(new CheckedRunnable() {
414	>	public void realRun() {
415	>	pleaseCancel.countDown();
416	>	try {
417	>	delay(LONG_DELAY_MS);
418	>	shouldThrow();
419	>	} catch (InterruptedException success) {}
420		}});
421
422		Thread t = newStartedThread(task);
423	<	threadStarted.await();
423	>	await(pleaseCancel);
424		assertTrue(task.cancel(true));
425	<	checkCancelled(task);
426	<	awaitTermination(t, MEDIUM_DELAY_MS);
425	>	assertTrue(task.isCancelled());
426	>	assertTrue(task.isDone());
427	>	awaitTermination(t);
428	>	assertEquals(1, task.runCount());
429	>	assertEquals(1, task.setCount());
430	>	assertEquals(0, task.setExceptionCount());
431	>	tryToConfuseDoneTask(task);
432		checkCancelled(task);
433		}
434
435		/**
436	<	* cancel(false) does not interrupt a running task
436	>	* cancel(true) tries to interrupt a running task, but
437	>	* Thread.interrupt throws (simulating a restrictive security
438	>	* manager)
439		*/
440	<	public void testCancelNoInterrupt() throws InterruptedException {
441	<	final CountDownLatch threadStarted = new CountDownLatch(1);
440	>	public void testCancelInterrupt_ThrowsSecurityException() {
441	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
442		final CountDownLatch cancelled = new CountDownLatch(1);
443	<	final FutureTask<Boolean> task =
444	<	new FutureTask<Boolean>(new CheckedCallable<Boolean>() {
445	<	public Boolean realCall() throws InterruptedException {
446	<	threadStarted.countDown();
447	<	cancelled.await(MEDIUM_DELAY_MS, MILLISECONDS);
443	>	final PublicFutureTask task =
444	>	new PublicFutureTask(new CheckedRunnable() {
445	>	public void realRun() {
446	>	pleaseCancel.countDown();
447	>	await(cancelled);
448		assertFalse(Thread.interrupted());
241	–	return Boolean.TRUE;
449		}});
450
451	<	Thread t = newStartedThread(task);
452	<	threadStarted.await();
453	<	assertTrue(task.cancel(false));
454	<	checkCancelled(task);
451	>	final Thread t = new Thread(task) {
452	>	// Simulate a restrictive security manager.
453	>	@Override public void interrupt() {
454	>	throw new SecurityException();
455	>	}};
456	>	t.setDaemon(true);
457	>	t.start();
458	>
459	>	await(pleaseCancel);
460	>	try {
461	>	task.cancel(true);
462	>	shouldThrow();
463	>	} catch (SecurityException expected) {}
464	>
465	>	// We failed to deliver the interrupt, but the world retains
466	>	// its sanity, as if we had done task.cancel(false)
467	>	assertTrue(task.isCancelled());
468	>	assertTrue(task.isDone());
469	>	assertEquals(1, task.runCount());
470	>	assertEquals(1, task.doneCount());
471	>	assertEquals(0, task.setCount());
472	>	assertEquals(0, task.setExceptionCount());
473		cancelled.countDown();
474	<	awaitTermination(t, MEDIUM_DELAY_MS);
474	>	awaitTermination(t);
475	>	assertEquals(1, task.setCount());
476	>	assertEquals(0, task.setExceptionCount());
477	>	tryToConfuseDoneTask(task);
478		checkCancelled(task);
479		}
480
481		/**
482	<	* run in one thread causes get in another thread to retrieve value
482	>	* cancel(true) interrupts a running task that subsequently throws
483		*/
484	<	public void testGetRun() throws InterruptedException {
485	<	final CountDownLatch threadStarted = new CountDownLatch(1);
486	<
487	<	final FutureTask task =
488	<	new FutureTask(new CheckedCallable<Object>() {
489	<	public Object realCall() throws InterruptedException {
490	<	return Boolean.TRUE;
484	>	public void testCancelInterrupt_taskFails() {
485	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
486	>	final PublicFutureTask task =
487	>	new PublicFutureTask(new Runnable() {
488	>	public void run() {
489	>	pleaseCancel.countDown();
490	>	try {
491	>	delay(LONG_DELAY_MS);
492	>	threadShouldThrow();
493	>	} catch (InterruptedException success) {
494	>	} catch (Throwable t) { threadUnexpectedException(t); }
495	>	throw new RuntimeException();
496		}});
497
498	<	Thread t = newStartedThread(new CheckedRunnable() {
499	<	public void realRun() throws Exception {
500	<	threadStarted.countDown();
501	<	assertSame(Boolean.TRUE, task.get());
502	<	}});
503	<
504	<	threadStarted.await();
505	<	checkNotDone(task);
506	<	assertTrue(t.isAlive());
507	<	task.run();
275	<	checkCompletedNormally(task, Boolean.TRUE);
276	<	awaitTermination(t, MEDIUM_DELAY_MS);
498	>	Thread t = newStartedThread(task);
499	>	await(pleaseCancel);
500	>	assertTrue(task.cancel(true));
501	>	assertTrue(task.isCancelled());
502	>	awaitTermination(t);
503	>	assertEquals(1, task.runCount());
504	>	assertEquals(0, task.setCount());
505	>	assertEquals(1, task.setExceptionCount());
506	>	tryToConfuseDoneTask(task);
507	>	checkCancelled(task);
508		}
509
510		/**
511	<	* set in one thread causes get in another thread to retrieve value
511	>	* cancel(false) does not interrupt a running task
512		*/
513	<	public void testGetSet() throws InterruptedException {
514	<	final CountDownLatch threadStarted = new CountDownLatch(1);
515	<
513	>	public void testCancelNoInterrupt() {
514	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
515	>	final CountDownLatch cancelled = new CountDownLatch(1);
516		final PublicFutureTask task =
517	<	new PublicFutureTask(new CheckedCallable<Object>() {
518	<	public Object realCall() throws InterruptedException {
517	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
518	>	public Boolean realCall() {
519	>	pleaseCancel.countDown();
520	>	await(cancelled);
521	>	assertFalse(Thread.interrupted());
522		return Boolean.TRUE;
523		}});
524
525	<	Thread t = newStartedThread(new CheckedRunnable() {
526	<	public void realRun() throws Exception {
527	<	threadStarted.countDown();
528	<	assertSame(Boolean.FALSE, task.get());
529	<	}});
530	<
531	<	threadStarted.await();
532	<	checkNotDone(task);
533	<	assertTrue(t.isAlive());
534	<	task.set(Boolean.FALSE);
535	<	checkCompletedNormally(task, Boolean.FALSE);
302	<	awaitTermination(t, MEDIUM_DELAY_MS);
525	>	Thread t = newStartedThread(task);
526	>	await(pleaseCancel);
527	>	assertTrue(task.cancel(false));
528	>	assertTrue(task.isCancelled());
529	>	cancelled.countDown();
530	>	awaitTermination(t);
531	>	assertEquals(1, task.runCount());
532	>	assertEquals(1, task.setCount());
533	>	assertEquals(0, task.setExceptionCount());
534	>	tryToConfuseDoneTask(task);
535	>	checkCancelled(task);
536		}
537
538		/**
539	<	* run in one thread causes timed get in another thread to retrieve value
539	>	* run in one thread causes get in another thread to retrieve value
540		*/
541	<	public void testTimedGetRun() throws InterruptedException {
542	<	final CountDownLatch threadStarted = new CountDownLatch(1);
541	>	public void testGetRun() {
542	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
543
544	<	final FutureTask task =
545	<	new FutureTask(new CheckedCallable<Object>() {
546	<	public Object realCall() throws InterruptedException {
547	<	return Boolean.TRUE;
544	>	final PublicFutureTask task =
545	>	new PublicFutureTask(new CheckedCallable<Object>() {
546	>	public Object realCall() {
547	>	return two;
548		}});
549
550	<	Thread t = newStartedThread(new CheckedRunnable() {
550	>	Thread t1 = newStartedThread(new CheckedRunnable() {
551		public void realRun() throws Exception {
552	<	threadStarted.countDown();
553	<	assertSame(Boolean.TRUE,
321	<	task.get(MEDIUM_DELAY_MS, MILLISECONDS));
552	>	pleaseRun.countDown();
553	>	assertSame(two, task.get());
554		}});
555
556	<	threadStarted.await();
556	>	Thread t2 = newStartedThread(new CheckedRunnable() {
557	>	public void realRun() throws Exception {
558	>	pleaseRun.countDown();
559	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
560	>	}});
561	>
562	>	await(pleaseRun);
563		checkNotDone(task);
564	<	assertTrue(t.isAlive());
564	>	assertTrue(t1.isAlive());
565	>	assertTrue(t2.isAlive());
566		task.run();
567	<	checkCompletedNormally(task, Boolean.TRUE);
568	<	awaitTermination(t, MEDIUM_DELAY_MS);
567	>	checkCompletedNormally(task, two);
568	>	assertEquals(1, task.runCount());
569	>	assertEquals(1, task.setCount());
570	>	assertEquals(0, task.setExceptionCount());
571	>	awaitTermination(t1);
572	>	awaitTermination(t2);
573	>	tryToConfuseDoneTask(task);
574	>	checkCompletedNormally(task, two);
575		}
576
577		/**
578	<	* set in one thread causes timed get in another thread to retrieve value
578	>	* set in one thread causes get in another thread to retrieve value
579		*/
580	<	public void testTimedGetSet() throws InterruptedException {
581	<	final CountDownLatch threadStarted = new CountDownLatch(1);
580	>	public void testGetSet() {
581	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
582
583		final PublicFutureTask task =
584		new PublicFutureTask(new CheckedCallable<Object>() {
585		public Object realCall() throws InterruptedException {
586	<	return Boolean.TRUE;
586	>	return two;
587		}});
588
589	<	Thread t = newStartedThread(new CheckedRunnable() {
589	>	Thread t1 = newStartedThread(new CheckedRunnable() {
590		public void realRun() throws Exception {
591	<	threadStarted.countDown();
592	<	assertSame(Boolean.FALSE,
348	<	task.get(MEDIUM_DELAY_MS, MILLISECONDS));
591	>	pleaseSet.countDown();
592	>	assertSame(two, task.get());
593		}});
594
595	<	threadStarted.await();
595	>	Thread t2 = newStartedThread(new CheckedRunnable() {
596	>	public void realRun() throws Exception {
597	>	pleaseSet.countDown();
598	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
599	>	}});
600	>
601	>	await(pleaseSet);
602		checkNotDone(task);
603	<	assertTrue(t.isAlive());
604	<	task.set(Boolean.FALSE);
605	<	checkCompletedNormally(task, Boolean.FALSE);
606	<	awaitTermination(t, MEDIUM_DELAY_MS);
603	>	assertTrue(t1.isAlive());
604	>	assertTrue(t2.isAlive());
605	>	task.set(two);
606	>	assertEquals(0, task.runCount());
607	>	assertEquals(1, task.setCount());
608	>	assertEquals(0, task.setExceptionCount());
609	>	tryToConfuseDoneTask(task);
610	>	checkCompletedNormally(task, two);
611	>	awaitTermination(t1);
612	>	awaitTermination(t2);
613		}
614
615		/**
616		* Cancelling a task causes timed get in another thread to throw
617		* CancellationException
618		*/
619	<	public void testTimedGet_Cancellation() throws InterruptedException {
620	<	final CountDownLatch threadStarted = new CountDownLatch(2);
365	<	final FutureTask task =
366	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
367	<	public Object realCall() throws InterruptedException {
368	<	threadStarted.countDown();
369	<	delay(LONG_DELAY_MS);
370	<	return Boolean.TRUE;
371	<	}});
372	<
373	<	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
374	<	public void realRun() throws Exception {
375	<	threadStarted.countDown();
376	<	task.get(MEDIUM_DELAY_MS, MILLISECONDS);
377	<	}};
378	<	Thread t2 = new Thread(task);
379	<	t1.start();
380	<	t2.start();
381	<	threadStarted.await();
382	<	task.cancel(true);
383	<	awaitTermination(t1, MEDIUM_DELAY_MS);
384	<	awaitTermination(t2, MEDIUM_DELAY_MS);
385	<	checkCancelled(task);
619	>	public void testTimedGet_Cancellation() {
620	>	testTimedGet_Cancellation(false);
621		}
622	<
623	<	/**
624	<	* Cancelling a task causes get in another thread to throw
625	<	* CancellationException
626	<	*/
627	<	public void testGet_Cancellation() throws InterruptedException {
628	<	final CountDownLatch threadStarted = new CountDownLatch(2);
629	<	final FutureTask task =
630	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
631	<	public Object realCall() throws InterruptedException {
632	<	threadStarted.countDown();
633	<	delay(LONG_DELAY_MS);
634	<	return Boolean.TRUE;
635	<	}});
622	>	public void testTimedGet_Cancellation_interrupt() {
623	>	testTimedGet_Cancellation(true);
624	>	}
625	>	public void testTimedGet_Cancellation(final boolean mayInterruptIfRunning) {
626	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
627	>	final CountDownLatch cancelled = new CountDownLatch(1);
628	>	final Callable<Object> callable =
629	>	new CheckedCallable<Object>() {
630	>	public Object realCall() throws InterruptedException {
631	>	pleaseCancel.countDown();
632	>	if (mayInterruptIfRunning) {
633	>	try {
634	>	delay(2*LONG_DELAY_MS);
635	>	} catch (InterruptedException success) {}
636	>	} else {
637	>	await(cancelled);
638	>	}
639	>	return two;
640	>	}};
641	>	final PublicFutureTask task = new PublicFutureTask(callable);
642
643		Thread t1 = new ThreadShouldThrow(CancellationException.class) {
644	<	public void realRun() throws Exception {
645	<	threadStarted.countDown();
646	<	task.get();
647	<	}};
648	<	Thread t2 = new Thread(task);
644	>	public void realRun() throws Exception {
645	>	pleaseCancel.countDown();
646	>	task.get();
647	>	}};
648	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
649	>	public void realRun() throws Exception {
650	>	pleaseCancel.countDown();
651	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
652	>	}};
653		t1.start();
654		t2.start();
655	<	threadStarted.await();
656	<	task.cancel(true);
657	<	awaitTermination(t1, MEDIUM_DELAY_MS);
658	<	awaitTermination(t2, MEDIUM_DELAY_MS);
655	>	Thread t3 = newStartedThread(task);
656	>	await(pleaseCancel);
657	>	checkIsRunning(task);
658	>	task.cancel(mayInterruptIfRunning);
659	>	checkCancelled(task);
660	>	awaitTermination(t1);
661	>	awaitTermination(t2);
662	>	cancelled.countDown();
663	>	awaitTermination(t3);
664	>	assertEquals(1, task.runCount());
665	>	assertEquals(1, task.setCount());
666	>	assertEquals(0, task.setExceptionCount());
667	>	tryToConfuseDoneTask(task);
668		checkCancelled(task);
669		}
670
417	–
671		/**
672		* A runtime exception in task causes get to throw ExecutionException
673		*/
674		public void testGet_ExecutionException() throws InterruptedException {
675	<	final FutureTask task = new FutureTask(new Callable() {
675	>	final ArithmeticException e = new ArithmeticException();
676	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
677		public Object call() {
678	<	return 5/0;
678	>	throw e;
679		}});
680
681		task.run();
682	+	assertEquals(1, task.runCount());
683	+	assertEquals(0, task.setCount());
684	+	assertEquals(1, task.setExceptionCount());
685		try {
686		task.get();
687		shouldThrow();
688		} catch (ExecutionException success) {
689	<	assertTrue(success.getCause() instanceof ArithmeticException);
689	>	assertSame(e, success.getCause());
690	>	tryToConfuseDoneTask(task);
691		checkCompletedAbnormally(task, success.getCause());
692		}
693		}
#	Line 438 | Line 696 | public class FutureTaskTest extends JSR1
696		* A runtime exception in task causes timed get to throw ExecutionException
697		*/
698		public void testTimedGet_ExecutionException2() throws Exception {
699	<	final FutureTask task = new FutureTask(new Callable() {
699	>	final ArithmeticException e = new ArithmeticException();
700	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
701		public Object call() {
702	<	return 5/0;
702	>	throw e;
703		}});
704
705		task.run();
706		try {
707	<	task.get(SHORT_DELAY_MS, MILLISECONDS);
707	>	task.get(LONG_DELAY_MS, MILLISECONDS);
708		shouldThrow();
709		} catch (ExecutionException success) {
710	<	assertTrue(success.getCause() instanceof ArithmeticException);
710	>	assertSame(e, success.getCause());
711	>	tryToConfuseDoneTask(task);
712		checkCompletedAbnormally(task, success.getCause());
713		}
714		}
715
456	–
716		/**
717	<	* Interrupting a waiting get causes it to throw InterruptedException
717	>	* get is interruptible
718		*/
719	<	public void testGet_InterruptedException() throws InterruptedException {
720	<	final CountDownLatch threadStarted = new CountDownLatch(1);
719	>	public void testGet_interruptible() {
720	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
721		final FutureTask task = new FutureTask(new NoOpCallable());
722	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
722	>	Thread t = newStartedThread(new CheckedRunnable() {
723		public void realRun() throws Exception {
724	<	threadStarted.countDown();
725	<	task.get();
724	>	Thread.currentThread().interrupt();
725	>	try {
726	>	task.get();
727	>	shouldThrow();
728	>	} catch (InterruptedException success) {}
729	>	assertFalse(Thread.interrupted());
730	>
731	>	pleaseInterrupt.countDown();
732	>	try {
733	>	task.get();
734	>	shouldThrow();
735	>	} catch (InterruptedException success) {}
736	>	assertFalse(Thread.interrupted());
737		}});
738
739	<	threadStarted.await();
739	>	await(pleaseInterrupt);
740		t.interrupt();
741	<	awaitTermination(t, MEDIUM_DELAY_MS);
741	>	awaitTermination(t);
742		checkNotDone(task);
743		}
744
745		/**
746	<	* Interrupting a waiting timed get causes it to throw InterruptedException
746	>	* timed get is interruptible
747		*/
748	<	public void testTimedGet_InterruptedException2() throws InterruptedException {
749	<	final CountDownLatch threadStarted = new CountDownLatch(1);
748	>	public void testTimedGet_interruptible() {
749	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
750		final FutureTask task = new FutureTask(new NoOpCallable());
751	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
751	>	Thread t = newStartedThread(new CheckedRunnable() {
752		public void realRun() throws Exception {
753	<	threadStarted.countDown();
754	<	task.get(LONG_DELAY_MS, MILLISECONDS);
753	>	Thread.currentThread().interrupt();
754	>	try {
755	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
756	>	shouldThrow();
757	>	} catch (InterruptedException success) {}
758	>	assertFalse(Thread.interrupted());
759	>
760	>	pleaseInterrupt.countDown();
761	>	try {
762	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
763	>	shouldThrow();
764	>	} catch (InterruptedException success) {}
765	>	assertFalse(Thread.interrupted());
766		}});
767
768	<	threadStarted.await();
768	>	await(pleaseInterrupt);
769		t.interrupt();
770	<	awaitTermination(t, MEDIUM_DELAY_MS);
770	>	awaitTermination(t);
771		checkNotDone(task);
772		}
773
#	Line 494 | Line 775 | public class FutureTaskTest extends JSR1
775		* A timed out timed get throws TimeoutException
776		*/
777		public void testGet_TimeoutException() throws Exception {
778	+	FutureTask task = new FutureTask(new NoOpCallable());
779	+	long startTime = System.nanoTime();
780		try {
781	<	FutureTask task = new FutureTask(new NoOpCallable());
499	<	task.get(1, MILLISECONDS);
781	>	task.get(timeoutMillis(), MILLISECONDS);
782		shouldThrow();
783	<	} catch (TimeoutException success) {}
783	>	} catch (TimeoutException success) {
784	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
785	>	}
786	>	}
787	>
788	>	/**
789	>	* timed get with null TimeUnit throws NullPointerException
790	>	*/
791	>	public void testGet_NullTimeUnit() throws Exception {
792	>	FutureTask task = new FutureTask(new NoOpCallable());
793	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
794	>
795	>	for (long timeout : timeouts) {
796	>	try {
797	>	task.get(timeout, null);
798	>	shouldThrow();
799	>	} catch (NullPointerException success) {}
800	>	}
801	>
802	>	task.run();
803	>
804	>	for (long timeout : timeouts) {
805	>	try {
806	>	task.get(timeout, null);
807	>	shouldThrow();
808	>	} catch (NullPointerException success) {}
809	>	}
810	>	}
811	>
812	>	/**
813	>	* timed get with most negative timeout works correctly (i.e. no
814	>	* underflow bug)
815	>	*/
816	>	public void testGet_NegativeInfinityTimeout() throws Exception {
817	>	final ExecutorService pool = Executors.newFixedThreadPool(10);
818	>	final Runnable nop = new Runnable() { public void run() {}};
819	>	final FutureTask<Void> task = new FutureTask<>(nop, null);
820	>	final List<Future<?>> futures = new ArrayList<>();
821	>	Runnable r = new Runnable() { public void run() {
822	>	for (long timeout : new long[] { 0L, -1L, Long.MIN_VALUE }) {
823	>	try {
824	>	task.get(timeout, NANOSECONDS);
825	>	shouldThrow();
826	>	} catch (TimeoutException success) {
827	>	} catch (Throwable fail) {threadUnexpectedException(fail);}}}};
828	>	for (int i = 0; i < 10; i++)
829	>	futures.add(pool.submit(r));
830	>	try {
831	>	joinPool(pool);
832	>	for (Future<?> future : futures)
833	>	checkCompletedNormally(future, null);
834	>	} finally {
835	>	task.run();         // last resort to help terminate
836	>	}
837		}
838
839		}

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