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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.27 by jsr166, Sat Jun 18 14:16:42 2011 UTC vs.
Revision 1.53 by jsr166, Sun Jul 22 22:13:55 2018 UTC

#	Line 6 | Line 6
6		* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
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 static java.util.concurrent.TimeUnit.MILLISECONDS;
25	<	import static java.util.concurrent.TimeUnit.SECONDS;
26	<	import java.util.*;
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	+	Object r2 = null;
64	+	try {
65	+	r2 = 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	+	if (exInfo == null)
74	+	assertSame(r, r2);
75	+	assertTrue(f.isDone());
76	+	}
77	+	}
78	+
79		void checkNotDone(Future<?> f) {
80		assertFalse(f.isDone());
81		assertFalse(f.isCancelled());
82	+	if (f instanceof PublicFutureTask) {
83	+	PublicFutureTask pf = (PublicFutureTask) f;
84	+	assertEquals(0, pf.doneCount());
85	+	assertEquals(0, pf.setCount());
86	+	assertEquals(0, pf.setExceptionCount());
87	+	}
88		}
89
90	<	<T> void checkCompletedNormally(Future<T> f, T expected) {
91	<	assertTrue(f.isDone());
90	>	void checkIsRunning(Future<?> f) {
91	>	checkNotDone(f);
92	>	if (f instanceof FutureTask) {
93	>	FutureTask ft = (FutureTask<?>) f;
94	>	// Check that run methods do nothing
95	>	ft.run();
96	>	if (f instanceof PublicFutureTask) {
97	>	PublicFutureTask pf = (PublicFutureTask) f;
98	>	int savedRunCount = pf.runCount();
99	>	pf.run();
100	>	assertFalse(pf.runAndReset());
101	>	assertEquals(savedRunCount, pf.runCount());
102	>	}
103	>	checkNotDone(f);
104	>	}
105	>	}
106	>
107	>	<T> void checkCompletedNormally(Future<T> f, T expectedValue) {
108	>	checkIsDone(f);
109		assertFalse(f.isCancelled());
110
111	+	T v1 = null, v2 = null;
112		try {
113	<	assertSame(expected, f.get());
113	>	v1 = f.get();
114	>	v2 = f.get(randomTimeout(), randomTimeUnit());
115		} catch (Throwable fail) { threadUnexpectedException(fail); }
116	<	try {
117	<	assertSame(expected, f.get(5L, SECONDS));
44	<	} catch (Throwable fail) { threadUnexpectedException(fail); }
45	<
46	<	assertFalse(f.cancel(false));
47	<	assertFalse(f.cancel(true));
116	>	assertSame(expectedValue, v1);
117	>	assertSame(expectedValue, v2);
118		}
119
120		void checkCancelled(Future<?> f) {
121	<	assertTrue(f.isDone());
121	>	checkIsDone(f);
122		assertTrue(f.isCancelled());
123
124		try {
#	Line 58 | Line 128 | public class FutureTaskTest extends JSR1
128		} catch (Throwable fail) { threadUnexpectedException(fail); }
129
130		try {
131	<	f.get(5L, SECONDS);
131	>	f.get(randomTimeout(), randomTimeUnit());
132		shouldThrow();
133		} catch (CancellationException success) {
134		} catch (Throwable fail) { threadUnexpectedException(fail); }
135	+	}
136
137	<	assertFalse(f.cancel(false));
138	<	assertFalse(f.cancel(true));
137	>	void tryToConfuseDoneTask(PublicFutureTask pf) {
138	>	pf.set(new Object());
139	>	pf.setException(new Error());
140	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
141	>	pf.cancel(mayInterruptIfRunning);
142	>	}
143		}
144
145		void checkCompletedAbnormally(Future<?> f, Throwable t) {
146	<	assertTrue(f.isDone());
146	>	checkIsDone(f);
147		assertFalse(f.isCancelled());
148
149		try {
#	Line 79 | Line 154 | public class FutureTaskTest extends JSR1
154		} catch (Throwable fail) { threadUnexpectedException(fail); }
155
156		try {
157	<	f.get(5L, SECONDS);
157	>	f.get(randomTimeout(), randomTimeUnit());
158		shouldThrow();
159		} catch (ExecutionException success) {
160		assertSame(t, success.getCause());
161		} catch (Throwable fail) { threadUnexpectedException(fail); }
87	–
88	–	assertFalse(f.cancel(false));
89	–	assertFalse(f.cancel(true));
162		}
163
164		/**
165		* Subclass to expose protected methods
166		*/
167		static class PublicFutureTask extends FutureTask {
168	<	public PublicFutureTask(Callable r) { super(r); }
169	<	public boolean runAndReset() { return super.runAndReset(); }
170	<	public void set(Object x) { super.set(x); }
171	<	public void setException(Throwable t) { super.setException(t); }
168	>	private final AtomicInteger runCount;
169	>	private final AtomicInteger doneCount = new AtomicInteger(0);
170	>	private final AtomicInteger runAndResetCount = new AtomicInteger(0);
171	>	private final AtomicInteger setCount = new AtomicInteger(0);
172	>	private final AtomicInteger setExceptionCount = new AtomicInteger(0);
173	>	public int runCount() { return runCount.get(); }
174	>	public int doneCount() { return doneCount.get(); }
175	>	public int runAndResetCount() { return runAndResetCount.get(); }
176	>	public int setCount() { return setCount.get(); }
177	>	public int setExceptionCount() { return setExceptionCount.get(); }
178	>
179	>	PublicFutureTask(Runnable runnable) {
180	>	this(runnable, seven);
181	>	}
182	>	PublicFutureTask(Runnable runnable, Object result) {
183	>	this(runnable, result, new AtomicInteger(0));
184	>	}
185	>	private PublicFutureTask(final Runnable runnable, Object result,
186	>	final AtomicInteger runCount) {
187	>	super(new Runnable() {
188	>	public void run() {
189	>	runCount.getAndIncrement();
190	>	runnable.run();
191	>	}}, result);
192	>	this.runCount = runCount;
193	>	}
194	>	PublicFutureTask(Callable callable) {
195	>	this(callable, new AtomicInteger(0));
196	>	}
197	>	private PublicFutureTask(final Callable callable,
198	>	final AtomicInteger runCount) {
199	>	super(new Callable() {
200	>	public Object call() throws Exception {
201	>	runCount.getAndIncrement();
202	>	return callable.call();
203	>	}});
204	>	this.runCount = runCount;
205	>	}
206	>	@Override public void done() {
207	>	assertTrue(isDone());
208	>	doneCount.incrementAndGet();
209	>	super.done();
210	>	}
211	>	@Override public boolean runAndReset() {
212	>	runAndResetCount.incrementAndGet();
213	>	return super.runAndReset();
214	>	}
215	>	@Override public void set(Object x) {
216	>	setCount.incrementAndGet();
217	>	super.set(x);
218	>	}
219	>	@Override public void setException(Throwable t) {
220	>	setExceptionCount.incrementAndGet();
221	>	super.setException(t);
222	>	}
223	>	}
224	>
225	>	class Counter extends CheckedRunnable {
226	>	final AtomicInteger count = new AtomicInteger(0);
227	>	public int get() { return count.get(); }
228	>	public void realRun() {
229	>	count.getAndIncrement();
230	>	}
231		}
232
233		/**
234	<	* Creating a future with a null callable throws NPE
234	>	* creating a future with a null callable throws NullPointerException
235		*/
236		public void testConstructor() {
237		try {
238	<	FutureTask task = new FutureTask(null);
238	>	new FutureTask(null);
239		shouldThrow();
240		} catch (NullPointerException success) {}
241		}
242
243		/**
244	<	* creating a future with null runnable fails
244	>	* creating a future with null runnable throws NullPointerException
245		*/
246		public void testConstructor2() {
247		try {
248	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
248	>	new FutureTask(null, Boolean.TRUE);
249		shouldThrow();
250		} catch (NullPointerException success) {}
251		}
#	Line 123 | Line 254 | public class FutureTaskTest extends JSR1
254		* isDone is true when a task completes
255		*/
256		public void testIsDone() {
257	<	FutureTask task = new FutureTask(new NoOpCallable());
257	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
258	>	assertFalse(task.isDone());
259		task.run();
260		assertTrue(task.isDone());
261		checkCompletedNormally(task, Boolean.TRUE);
262	+	assertEquals(1, task.runCount());
263		}
264
265		/**
#	Line 134 | Line 267 | public class FutureTaskTest extends JSR1
267		*/
268		public void testRunAndReset() {
269		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
270	<	assertTrue(task.runAndReset());
271	<	checkNotDone(task);
270	>	for (int i = 0; i < 3; i++) {
271	>	assertTrue(task.runAndReset());
272	>	checkNotDone(task);
273	>	assertEquals(i + 1, task.runCount());
274	>	assertEquals(i + 1, task.runAndResetCount());
275	>	assertEquals(0, task.setCount());
276	>	assertEquals(0, task.setExceptionCount());
277	>	}
278		}
279
280		/**
281		* runAndReset after cancellation fails
282		*/
283	<	public void testResetAfterCancel() {
284	<	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
285	<	assertTrue(task.cancel(false));
286	<	assertFalse(task.runAndReset());
287	<	checkCancelled(task);
283	>	public void testRunAndResetAfterCancel() {
284	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
285	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
286	>	assertTrue(task.cancel(mayInterruptIfRunning));
287	>	for (int i = 0; i < 3; i++) {
288	>	assertFalse(task.runAndReset());
289	>	assertEquals(0, task.runCount());
290	>	assertEquals(i + 1, task.runAndResetCount());
291	>	assertEquals(0, task.setCount());
292	>	assertEquals(0, task.setExceptionCount());
293	>	}
294	>	tryToConfuseDoneTask(task);
295	>	checkCancelled(task);
296	>	}
297		}
298
299		/**
#	Line 154 | Line 302 | public class FutureTaskTest extends JSR1
302		public void testSet() throws Exception {
303		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
304		task.set(one);
305	<	assertSame(task.get(), one);
305	>	for (int i = 0; i < 3; i++) {
306	>	assertSame(one, task.get());
307	>	assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS));
308	>	assertEquals(1, task.setCount());
309	>	}
310	>	tryToConfuseDoneTask(task);
311		checkCompletedNormally(task, one);
312	+	assertEquals(0, task.runCount());
313		}
314
315		/**
316		* setException causes get to throw ExecutionException
317		*/
318	<	public void testSetException() throws Exception {
318	>	public void testSetException_get() throws Exception {
319		Exception nse = new NoSuchElementException();
320		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
321		task.setException(nse);
322	+
323	+	try {
324	+	task.get();
325	+	shouldThrow();
326	+	} catch (ExecutionException success) {
327	+	assertSame(nse, success.getCause());
328	+	checkCompletedAbnormally(task, nse);
329	+	}
330	+
331		try {
332	<	Object x = task.get();
332	>	task.get(LONG_DELAY_MS, MILLISECONDS);
333		shouldThrow();
334		} catch (ExecutionException success) {
335	<	assertSame(success.getCause(), nse);
335	>	assertSame(nse, success.getCause());
336		checkCompletedAbnormally(task, nse);
337		}
338	+
339	+	assertEquals(1, task.setExceptionCount());
340	+	assertEquals(0, task.setCount());
341	+	tryToConfuseDoneTask(task);
342	+	checkCompletedAbnormally(task, nse);
343	+	assertEquals(0, task.runCount());
344		}
345
346		/**
347	<	* Cancelling before running succeeds
347	>	* cancel(false) before run succeeds
348		*/
349		public void testCancelBeforeRun() {
350	<	FutureTask task = new FutureTask(new NoOpCallable());
350	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
351		assertTrue(task.cancel(false));
352		task.run();
353	+	assertEquals(0, task.runCount());
354	+	assertEquals(0, task.setCount());
355	+	assertEquals(0, task.setExceptionCount());
356	+	assertTrue(task.isCancelled());
357	+	assertTrue(task.isDone());
358	+	tryToConfuseDoneTask(task);
359	+	assertEquals(0, task.runCount());
360		checkCancelled(task);
361		}
362
363		/**
364	<	* Cancel(true) before run succeeds
364	>	* cancel(true) before run succeeds
365		*/
366		public void testCancelBeforeRun2() {
367	<	FutureTask task = new FutureTask(new NoOpCallable());
367	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
368		assertTrue(task.cancel(true));
369		task.run();
370	+	assertEquals(0, task.runCount());
371	+	assertEquals(0, task.setCount());
372	+	assertEquals(0, task.setExceptionCount());
373	+	assertTrue(task.isCancelled());
374	+	assertTrue(task.isDone());
375	+	tryToConfuseDoneTask(task);
376	+	assertEquals(0, task.runCount());
377		checkCancelled(task);
378		}
379
380		/**
381	<	* cancel of a completed task fails
381	>	* cancel(false) of a completed task fails
382		*/
383		public void testCancelAfterRun() {
384	<	FutureTask task = new FutureTask(new NoOpCallable());
384	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
385		task.run();
386		assertFalse(task.cancel(false));
387	+	assertEquals(1, task.runCount());
388	+	assertEquals(1, task.setCount());
389	+	assertEquals(0, task.setExceptionCount());
390	+	tryToConfuseDoneTask(task);
391		checkCompletedNormally(task, Boolean.TRUE);
392	+	assertEquals(1, task.runCount());
393		}
394
395		/**
396	<	* cancel(true) interrupts a running task
396	>	* cancel(true) of a completed task fails
397		*/
398	<	public void testCancelInterrupt() throws InterruptedException {
399	<	final CountDownLatch threadStarted = new CountDownLatch(1);
400	<	final FutureTask task =
401	<	new FutureTask(new CheckedCallable<Object>() {
402	<	public Object realCall() {
403	<	threadStarted.countDown();
404	<	long t0 = System.nanoTime();
405	<	for (;;) {
406	<	if (Thread.interrupted())
407	<	return Boolean.TRUE;
408	<	if (millisElapsedSince(t0) > MEDIUM_DELAY_MS)
409	<	fail("interrupt not delivered");
410	<	Thread.yield();
411	<	}
398	>	public void testCancelAfterRun2() {
399	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
400	>	task.run();
401	>	assertFalse(task.cancel(true));
402	>	assertEquals(1, task.runCount());
403	>	assertEquals(1, task.setCount());
404	>	assertEquals(0, task.setExceptionCount());
405	>	tryToConfuseDoneTask(task);
406	>	checkCompletedNormally(task, Boolean.TRUE);
407	>	assertEquals(1, task.runCount());
408	>	}
409	>
410	>	/**
411	>	* cancel(true) interrupts a running task that subsequently succeeds
412	>	*/
413	>	public void testCancelInterrupt() {
414	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
415	>	final PublicFutureTask task =
416	>	new PublicFutureTask(new CheckedRunnable() {
417	>	public void realRun() {
418	>	pleaseCancel.countDown();
419	>	try {
420	>	delay(LONG_DELAY_MS);
421	>	shouldThrow();
422	>	} catch (InterruptedException success) {}
423	>	assertFalse(Thread.interrupted());
424		}});
425
426		Thread t = newStartedThread(task);
427	<	threadStarted.await();
427	>	await(pleaseCancel);
428		assertTrue(task.cancel(true));
429	<	checkCancelled(task);
430	<	awaitTermination(t, MEDIUM_DELAY_MS);
429	>	assertTrue(task.isCancelled());
430	>	assertTrue(task.isDone());
431	>	awaitTermination(t);
432	>	assertEquals(1, task.runCount());
433	>	assertEquals(1, task.setCount());
434	>	assertEquals(0, task.setExceptionCount());
435	>	tryToConfuseDoneTask(task);
436		checkCancelled(task);
437		}
438
439		/**
440	<	* cancel(false) does not interrupt a running task
440	>	* cancel(true) tries to interrupt a running task, but
441	>	* Thread.interrupt throws (simulating a restrictive security
442	>	* manager)
443		*/
444	<	public void testCancelNoInterrupt() throws InterruptedException {
445	<	final CountDownLatch threadStarted = new CountDownLatch(1);
444	>	public void testCancelInterrupt_ThrowsSecurityException() {
445	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
446		final CountDownLatch cancelled = new CountDownLatch(1);
447	<	final FutureTask<Boolean> task =
448	<	new FutureTask<Boolean>(new CheckedCallable<Boolean>() {
449	<	public Boolean realCall() throws InterruptedException {
450	<	threadStarted.countDown();
451	<	cancelled.await(MEDIUM_DELAY_MS, MILLISECONDS);
447	>	final PublicFutureTask task =
448	>	new PublicFutureTask(new CheckedRunnable() {
449	>	public void realRun() {
450	>	pleaseCancel.countDown();
451	>	await(cancelled);
452		assertFalse(Thread.interrupted());
246	–	return Boolean.TRUE;
453		}});
454
455	<	Thread t = newStartedThread(task);
456	<	threadStarted.await();
457	<	assertTrue(task.cancel(false));
458	<	checkCancelled(task);
455	>	final Thread t = new Thread(task) {
456	>	// Simulate a restrictive security manager.
457	>	@Override public void interrupt() {
458	>	throw new SecurityException();
459	>	}};
460	>	t.setDaemon(true);
461	>	t.start();
462	>
463	>	await(pleaseCancel);
464	>	try {
465	>	task.cancel(true);
466	>	shouldThrow();
467	>	} catch (SecurityException success) {}
468	>
469	>	// We failed to deliver the interrupt, but the world retains
470	>	// its sanity, as if we had done task.cancel(false)
471	>	assertTrue(task.isCancelled());
472	>	assertTrue(task.isDone());
473	>	assertEquals(1, task.runCount());
474	>	assertEquals(1, task.doneCount());
475	>	assertEquals(0, task.setCount());
476	>	assertEquals(0, task.setExceptionCount());
477		cancelled.countDown();
478	<	awaitTermination(t, MEDIUM_DELAY_MS);
478	>	awaitTermination(t);
479	>	assertEquals(1, task.setCount());
480	>	assertEquals(0, task.setExceptionCount());
481	>	tryToConfuseDoneTask(task);
482		checkCancelled(task);
483		}
484
485		/**
486	<	* run in one thread causes get in another thread to retrieve value
486	>	* cancel(true) interrupts a running task that subsequently throws
487		*/
488	<	public void testGetRun() throws InterruptedException {
489	<	final CountDownLatch threadStarted = new CountDownLatch(1);
490	<
491	<	final FutureTask task =
492	<	new FutureTask(new CheckedCallable<Object>() {
493	<	public Object realCall() throws InterruptedException {
494	<	return Boolean.TRUE;
488	>	public void testCancelInterrupt_taskFails() {
489	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
490	>	final PublicFutureTask task =
491	>	new PublicFutureTask(new Runnable() {
492	>	public void run() {
493	>	pleaseCancel.countDown();
494	>	try {
495	>	delay(LONG_DELAY_MS);
496	>	threadShouldThrow();
497	>	} catch (InterruptedException success) {
498	>	} catch (Throwable t) { threadUnexpectedException(t); }
499	>	throw new RuntimeException();
500		}});
501
502	<	Thread t = newStartedThread(new CheckedRunnable() {
503	<	public void realRun() throws Exception {
504	<	threadStarted.countDown();
505	<	assertSame(Boolean.TRUE, task.get());
506	<	}});
507	<
508	<	threadStarted.await();
509	<	checkNotDone(task);
510	<	assertTrue(t.isAlive());
511	<	task.run();
280	<	checkCompletedNormally(task, Boolean.TRUE);
281	<	awaitTermination(t, MEDIUM_DELAY_MS);
502	>	Thread t = newStartedThread(task);
503	>	await(pleaseCancel);
504	>	assertTrue(task.cancel(true));
505	>	assertTrue(task.isCancelled());
506	>	awaitTermination(t);
507	>	assertEquals(1, task.runCount());
508	>	assertEquals(0, task.setCount());
509	>	assertEquals(1, task.setExceptionCount());
510	>	tryToConfuseDoneTask(task);
511	>	checkCancelled(task);
512		}
513
514		/**
515	<	* set in one thread causes get in another thread to retrieve value
515	>	* cancel(false) does not interrupt a running task
516		*/
517	<	public void testGetSet() throws InterruptedException {
518	<	final CountDownLatch threadStarted = new CountDownLatch(1);
519	<
517	>	public void testCancelNoInterrupt() {
518	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
519	>	final CountDownLatch cancelled = new CountDownLatch(1);
520		final PublicFutureTask task =
521	<	new PublicFutureTask(new CheckedCallable<Object>() {
522	<	public Object realCall() throws InterruptedException {
521	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
522	>	public Boolean realCall() {
523	>	pleaseCancel.countDown();
524	>	await(cancelled);
525	>	assertFalse(Thread.interrupted());
526		return Boolean.TRUE;
527		}});
528
529	<	Thread t = newStartedThread(new CheckedRunnable() {
530	<	public void realRun() throws Exception {
531	<	threadStarted.countDown();
532	<	assertSame(Boolean.FALSE, task.get());
533	<	}});
534	<
535	<	threadStarted.await();
536	<	checkNotDone(task);
537	<	assertTrue(t.isAlive());
538	<	task.set(Boolean.FALSE);
539	<	checkCompletedNormally(task, Boolean.FALSE);
307	<	awaitTermination(t, MEDIUM_DELAY_MS);
529	>	Thread t = newStartedThread(task);
530	>	await(pleaseCancel);
531	>	assertTrue(task.cancel(false));
532	>	assertTrue(task.isCancelled());
533	>	cancelled.countDown();
534	>	awaitTermination(t);
535	>	assertEquals(1, task.runCount());
536	>	assertEquals(1, task.setCount());
537	>	assertEquals(0, task.setExceptionCount());
538	>	tryToConfuseDoneTask(task);
539	>	checkCancelled(task);
540		}
541
542		/**
543	<	* run in one thread causes timed get in another thread to retrieve value
543	>	* run in one thread causes get in another thread to retrieve value
544		*/
545	<	public void testTimedGetRun() throws InterruptedException {
546	<	final CountDownLatch threadStarted = new CountDownLatch(1);
545	>	public void testGetRun() {
546	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
547
548	<	final FutureTask task =
549	<	new FutureTask(new CheckedCallable<Object>() {
550	<	public Object realCall() throws InterruptedException {
551	<	return Boolean.TRUE;
548	>	final PublicFutureTask task =
549	>	new PublicFutureTask(new CheckedCallable<Object>() {
550	>	public Object realCall() {
551	>	return two;
552		}});
553
554	<	Thread t = newStartedThread(new CheckedRunnable() {
554	>	Thread t1 = newStartedThread(new CheckedRunnable() {
555		public void realRun() throws Exception {
556	<	threadStarted.countDown();
557	<	assertSame(Boolean.TRUE,
326	<	task.get(MEDIUM_DELAY_MS, MILLISECONDS));
556	>	pleaseRun.countDown();
557	>	assertSame(two, task.get());
558		}});
559
560	<	threadStarted.await();
560	>	Thread t2 = newStartedThread(new CheckedRunnable() {
561	>	public void realRun() throws Exception {
562	>	pleaseRun.countDown();
563	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
564	>	}});
565	>
566	>	await(pleaseRun);
567		checkNotDone(task);
568	<	assertTrue(t.isAlive());
568	>	assertTrue(t1.isAlive());
569	>	assertTrue(t2.isAlive());
570		task.run();
571	<	checkCompletedNormally(task, Boolean.TRUE);
572	<	awaitTermination(t, MEDIUM_DELAY_MS);
571	>	checkCompletedNormally(task, two);
572	>	assertEquals(1, task.runCount());
573	>	assertEquals(1, task.setCount());
574	>	assertEquals(0, task.setExceptionCount());
575	>	awaitTermination(t1);
576	>	awaitTermination(t2);
577	>	tryToConfuseDoneTask(task);
578	>	checkCompletedNormally(task, two);
579		}
580
581		/**
582	<	* set in one thread causes timed get in another thread to retrieve value
582	>	* set in one thread causes get in another thread to retrieve value
583		*/
584	<	public void testTimedGetSet() throws InterruptedException {
585	<	final CountDownLatch threadStarted = new CountDownLatch(1);
584	>	public void testGetSet() {
585	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
586
587		final PublicFutureTask task =
588		new PublicFutureTask(new CheckedCallable<Object>() {
589		public Object realCall() throws InterruptedException {
590	<	return Boolean.TRUE;
590	>	return two;
591		}});
592
593	<	Thread t = newStartedThread(new CheckedRunnable() {
593	>	Thread t1 = newStartedThread(new CheckedRunnable() {
594	>	public void realRun() throws Exception {
595	>	pleaseSet.countDown();
596	>	assertSame(two, task.get());
597	>	}});
598	>
599	>	Thread t2 = newStartedThread(new CheckedRunnable() {
600		public void realRun() throws Exception {
601	<	threadStarted.countDown();
602	<	assertSame(Boolean.FALSE,
353	<	task.get(MEDIUM_DELAY_MS, MILLISECONDS));
601	>	pleaseSet.countDown();
602	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
603		}});
604
605	<	threadStarted.await();
605	>	await(pleaseSet);
606		checkNotDone(task);
607	<	assertTrue(t.isAlive());
608	<	task.set(Boolean.FALSE);
609	<	checkCompletedNormally(task, Boolean.FALSE);
610	<	awaitTermination(t, MEDIUM_DELAY_MS);
607	>	assertTrue(t1.isAlive());
608	>	assertTrue(t2.isAlive());
609	>	task.set(two);
610	>	assertEquals(0, task.runCount());
611	>	assertEquals(1, task.setCount());
612	>	assertEquals(0, task.setExceptionCount());
613	>	tryToConfuseDoneTask(task);
614	>	checkCompletedNormally(task, two);
615	>	awaitTermination(t1);
616	>	awaitTermination(t2);
617		}
618
619		/**
620		* Cancelling a task causes timed get in another thread to throw
621		* CancellationException
622		*/
623	<	public void testTimedGet_Cancellation() throws InterruptedException {
624	<	final CountDownLatch threadStarted = new CountDownLatch(2);
370	<	final FutureTask task =
371	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
372	<	public Object realCall() throws InterruptedException {
373	<	threadStarted.countDown();
374	<	delay(LONG_DELAY_MS);
375	<	return Boolean.TRUE;
376	<	}});
377	<
378	<	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
379	<	public void realRun() throws Exception {
380	<	threadStarted.countDown();
381	<	task.get(MEDIUM_DELAY_MS, MILLISECONDS);
382	<	}};
383	<	Thread t2 = new Thread(task);
384	<	t1.start();
385	<	t2.start();
386	<	threadStarted.await();
387	<	task.cancel(true);
388	<	awaitTermination(t1, MEDIUM_DELAY_MS);
389	<	awaitTermination(t2, MEDIUM_DELAY_MS);
390	<	checkCancelled(task);
623	>	public void testTimedGet_Cancellation() {
624	>	testTimedGet_Cancellation(false);
625		}
626	<
627	<	/**
628	<	* Cancelling a task causes get in another thread to throw
629	<	* CancellationException
630	<	*/
631	<	public void testGet_Cancellation() throws InterruptedException {
632	<	final CountDownLatch threadStarted = new CountDownLatch(2);
633	<	final FutureTask task =
634	<	new FutureTask(new CheckedInterruptedCallable<Object>() {
635	<	public Object realCall() throws InterruptedException {
636	<	threadStarted.countDown();
637	<	delay(LONG_DELAY_MS);
638	<	return Boolean.TRUE;
639	<	}});
626	>	public void testTimedGet_Cancellation_interrupt() {
627	>	testTimedGet_Cancellation(true);
628	>	}
629	>	public void testTimedGet_Cancellation(final boolean mayInterruptIfRunning) {
630	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
631	>	final CountDownLatch cancelled = new CountDownLatch(1);
632	>	final Callable<Object> callable =
633	>	new CheckedCallable<Object>() {
634	>	public Object realCall() throws InterruptedException {
635	>	pleaseCancel.countDown();
636	>	if (mayInterruptIfRunning) {
637	>	try {
638	>	delay(2*LONG_DELAY_MS);
639	>	} catch (InterruptedException success) {}
640	>	} else {
641	>	await(cancelled);
642	>	}
643	>	return two;
644	>	}};
645	>	final PublicFutureTask task = new PublicFutureTask(callable);
646
647		Thread t1 = new ThreadShouldThrow(CancellationException.class) {
648	<	public void realRun() throws Exception {
649	<	threadStarted.countDown();
650	<	task.get();
651	<	}};
652	<	Thread t2 = new Thread(task);
648	>	public void realRun() throws Exception {
649	>	pleaseCancel.countDown();
650	>	task.get();
651	>	}};
652	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
653	>	public void realRun() throws Exception {
654	>	pleaseCancel.countDown();
655	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
656	>	}};
657		t1.start();
658		t2.start();
659	<	threadStarted.await();
660	<	task.cancel(true);
661	<	awaitTermination(t1, MEDIUM_DELAY_MS);
662	<	awaitTermination(t2, MEDIUM_DELAY_MS);
659	>	Thread t3 = newStartedThread(task);
660	>	await(pleaseCancel);
661	>	checkIsRunning(task);
662	>	task.cancel(mayInterruptIfRunning);
663	>	checkCancelled(task);
664	>	awaitTermination(t1);
665	>	awaitTermination(t2);
666	>	cancelled.countDown();
667	>	awaitTermination(t3);
668	>	assertEquals(1, task.runCount());
669	>	assertEquals(1, task.setCount());
670	>	assertEquals(0, task.setExceptionCount());
671	>	tryToConfuseDoneTask(task);
672		checkCancelled(task);
673		}
674
#	Line 423 | Line 676 | public class FutureTaskTest extends JSR1
676		* A runtime exception in task causes get to throw ExecutionException
677		*/
678		public void testGet_ExecutionException() throws InterruptedException {
679	<	final FutureTask task = new FutureTask(new Callable() {
679	>	final ArithmeticException e = new ArithmeticException();
680	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
681		public Object call() {
682	<	return 5/0;
682	>	throw e;
683		}});
684
685		task.run();
686	+	assertEquals(1, task.runCount());
687	+	assertEquals(0, task.setCount());
688	+	assertEquals(1, task.setExceptionCount());
689		try {
690		task.get();
691		shouldThrow();
692		} catch (ExecutionException success) {
693	<	assertTrue(success.getCause() instanceof ArithmeticException);
693	>	assertSame(e, success.getCause());
694	>	tryToConfuseDoneTask(task);
695		checkCompletedAbnormally(task, success.getCause());
696		}
697		}
#	Line 442 | Line 700 | public class FutureTaskTest extends JSR1
700		* A runtime exception in task causes timed get to throw ExecutionException
701		*/
702		public void testTimedGet_ExecutionException2() throws Exception {
703	<	final FutureTask task = new FutureTask(new Callable() {
703	>	final ArithmeticException e = new ArithmeticException();
704	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
705		public Object call() {
706	<	return 5/0;
706	>	throw e;
707		}});
708
709		task.run();
710		try {
711	<	task.get(SHORT_DELAY_MS, MILLISECONDS);
711	>	task.get(LONG_DELAY_MS, MILLISECONDS);
712		shouldThrow();
713		} catch (ExecutionException success) {
714	<	assertTrue(success.getCause() instanceof ArithmeticException);
714	>	assertSame(e, success.getCause());
715	>	tryToConfuseDoneTask(task);
716		checkCompletedAbnormally(task, success.getCause());
717		}
718		}
719
720		/**
721	<	* Interrupting a waiting get causes it to throw InterruptedException
721	>	* get is interruptible
722		*/
723	<	public void testGet_InterruptedException() throws InterruptedException {
724	<	final CountDownLatch threadStarted = new CountDownLatch(1);
723	>	public void testGet_interruptible() {
724	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
725		final FutureTask task = new FutureTask(new NoOpCallable());
726	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
726	>	Thread t = newStartedThread(new CheckedRunnable() {
727		public void realRun() throws Exception {
728	<	threadStarted.countDown();
729	<	task.get();
728	>	Thread.currentThread().interrupt();
729	>	try {
730	>	task.get();
731	>	shouldThrow();
732	>	} catch (InterruptedException success) {}
733	>	assertFalse(Thread.interrupted());
734	>
735	>	pleaseInterrupt.countDown();
736	>	try {
737	>	task.get();
738	>	shouldThrow();
739	>	} catch (InterruptedException success) {}
740	>	assertFalse(Thread.interrupted());
741		}});
742
743	<	threadStarted.await();
743	>	await(pleaseInterrupt);
744		t.interrupt();
745	<	awaitTermination(t, MEDIUM_DELAY_MS);
745	>	awaitTermination(t);
746		checkNotDone(task);
747		}
748
749		/**
750	<	* Interrupting a waiting timed get causes it to throw InterruptedException
750	>	* timed get is interruptible
751		*/
752	<	public void testTimedGet_InterruptedException2() throws InterruptedException {
753	<	final CountDownLatch threadStarted = new CountDownLatch(1);
752	>	public void testTimedGet_interruptible() {
753	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
754		final FutureTask task = new FutureTask(new NoOpCallable());
755	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
755	>	Thread t = newStartedThread(new CheckedRunnable() {
756		public void realRun() throws Exception {
757	<	threadStarted.countDown();
758	<	task.get(LONG_DELAY_MS, MILLISECONDS);
757	>	Thread.currentThread().interrupt();
758	>	try {
759	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
760	>	shouldThrow();
761	>	} catch (InterruptedException success) {}
762	>	assertFalse(Thread.interrupted());
763	>
764	>	pleaseInterrupt.countDown();
765	>	try {
766	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
767	>	shouldThrow();
768	>	} catch (InterruptedException success) {}
769	>	assertFalse(Thread.interrupted());
770		}});
771
772	<	threadStarted.await();
772	>	await(pleaseInterrupt);
773		t.interrupt();
774	<	awaitTermination(t, MEDIUM_DELAY_MS);
774	>	awaitTermination(t);
775		checkNotDone(task);
776		}
777
#	Line 497 | Line 779 | public class FutureTaskTest extends JSR1
779		* A timed out timed get throws TimeoutException
780		*/
781		public void testGet_TimeoutException() throws Exception {
782	+	FutureTask task = new FutureTask(new NoOpCallable());
783	+	long startTime = System.nanoTime();
784		try {
785	<	FutureTask task = new FutureTask(new NoOpCallable());
502	<	task.get(1, MILLISECONDS);
785	>	task.get(timeoutMillis(), MILLISECONDS);
786		shouldThrow();
787	<	} catch (TimeoutException success) {}
787	>	} catch (TimeoutException success) {
788	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
789	>	}
790	>	}
791	>
792	>	/**
793	>	* timed get with null TimeUnit throws NullPointerException
794	>	*/
795	>	public void testGet_NullTimeUnit() throws Exception {
796	>	FutureTask task = new FutureTask(new NoOpCallable());
797	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
798	>
799	>	for (long timeout : timeouts) {
800	>	try {
801	>	task.get(timeout, null);
802	>	shouldThrow();
803	>	} catch (NullPointerException success) {}
804	>	}
805	>
806	>	task.run();
807	>
808	>	for (long timeout : timeouts) {
809	>	try {
810	>	task.get(timeout, null);
811	>	shouldThrow();
812	>	} catch (NullPointerException success) {}
813	>	}
814	>	}
815	>
816	>	/**
817	>	* timed get with most negative timeout works correctly (i.e. no
818	>	* underflow bug)
819	>	*/
820	>	public void testGet_NegativeInfinityTimeout() throws Exception {
821	>	final ExecutorService pool = Executors.newFixedThreadPool(10);
822	>	final Runnable nop = new Runnable() { public void run() {}};
823	>	final FutureTask<Void> task = new FutureTask<>(nop, null);
824	>	final List<Future<?>> futures = new ArrayList<>();
825	>	Runnable r = new Runnable() { public void run() {
826	>	for (long timeout : new long[] { 0L, -1L, Long.MIN_VALUE }) {
827	>	try {
828	>	task.get(timeout, NANOSECONDS);
829	>	shouldThrow();
830	>	} catch (TimeoutException success) {
831	>	} catch (Throwable fail) {threadUnexpectedException(fail);}}}};
832	>	for (int i = 0; i < 10; i++)
833	>	futures.add(pool.submit(r));
834	>	try {
835	>	joinPool(pool);
836	>	for (Future<?> future : futures)
837	>	checkCompletedNormally(future, null);
838	>	} finally {
839	>	task.run();         // last resort to help terminate
840	>	}
841	>	}
842	>
843	>	/**
844	>	* toString indicates current completion state
845	>	*/
846	>	public void testToString_incomplete() {
847	>	FutureTask<String> f = new FutureTask<>(() -> "");
848	>	assertTrue(f.toString().matches(".*\\[.*Not completed.*\\]"));
849	>	if (testImplementationDetails)
850	>	assertTrue(f.toString().startsWith(
851	>	identityString(f) + "[Not completed, task ="));
852	>	}
853	>
854	>	public void testToString_normal() {
855	>	FutureTask<String> f = new FutureTask<>(() -> "");
856	>	f.run();
857	>	assertTrue(f.toString().matches(".*\\[.*Completed normally.*\\]"));
858	>	if (testImplementationDetails)
859	>	assertEquals(identityString(f) + "[Completed normally]",
860	>	f.toString());
861	>	}
862	>
863	>	public void testToString_exception() {
864	>	FutureTask<String> f = new FutureTask<>(
865	>	() -> { throw new ArithmeticException(); });
866	>	f.run();
867	>	assertTrue(f.toString().matches(".*\\[.*Completed exceptionally.*\\]"));
868	>	if (testImplementationDetails)
869	>	assertTrue(f.toString().startsWith(
870	>	identityString(f) + "[Completed exceptionally: "));
871	>	}
872	>
873	>	public void testToString_cancelled() {
874	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
875	>	FutureTask<String> f = new FutureTask<>(() -> "");
876	>	assertTrue(f.cancel(mayInterruptIfRunning));
877	>	assertTrue(f.toString().matches(".*\\[.*Cancelled.*\\]"));
878	>	if (testImplementationDetails)
879	>	assertEquals(identityString(f) + "[Cancelled]",
880	>	f.toString());
881	>	}
882		}
883
884		}

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