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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.9 by dl, Mon Dec 22 16:25:38 2003 UTC vs.
Revision 1.39 by jsr166, Fri Aug 22 03:30:56 2014 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
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/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	<	import java.util.concurrent.*;
10	>	import java.util.concurrent.Callable;
11	>	import java.util.concurrent.CancellationException;
12	>	import java.util.concurrent.CountDownLatch;
13	>	import java.util.concurrent.ExecutorService;
14	>	import java.util.concurrent.Executors;
15	>	import java.util.concurrent.ExecutionException;
16	>	import java.util.concurrent.Future;
17	>	import java.util.concurrent.FutureTask;
18	>	import java.util.concurrent.TimeoutException;
19	>	import java.util.concurrent.atomic.AtomicInteger;
20	>	import static java.util.concurrent.TimeUnit.*;
21		import java.util.*;
22
23		public class FutureTaskTest extends JSR166TestCase {
24
25		public static void main(String[] args) {
26	<	junit.textui.TestRunner.run (suite());
26	>	junit.textui.TestRunner.run(suite());
27		}
28		public static Test suite() {
29	<	return new TestSuite(FutureTaskTest.class);
29	>	return new TestSuite(FutureTaskTest.class);
30	>	}
31	>
32	>	void checkIsDone(Future<?> f) {
33	>	assertTrue(f.isDone());
34	>	assertFalse(f.cancel(false));
35	>	assertFalse(f.cancel(true));
36	>	if (f instanceof PublicFutureTask) {
37	>	PublicFutureTask pf = (PublicFutureTask) f;
38	>	assertEquals(1, pf.doneCount());
39	>	assertFalse(pf.runAndReset());
40	>	assertEquals(1, pf.doneCount());
41	>	Object r = null; Object exInfo = null;
42	>	try {
43	>	r = f.get();
44	>	} catch (CancellationException t) {
45	>	exInfo = CancellationException.class;
46	>	} catch (ExecutionException t) {
47	>	exInfo = t.getCause();
48	>	} catch (Throwable t) {
49	>	threadUnexpectedException(t);
50	>	}
51	>
52	>	// Check that run and runAndReset have no effect.
53	>	int savedRunCount = pf.runCount();
54	>	pf.run();
55	>	pf.runAndReset();
56	>	assertEquals(savedRunCount, pf.runCount());
57	>	try {
58	>	assertSame(r, f.get());
59	>	} catch (CancellationException t) {
60	>	assertSame(exInfo, CancellationException.class);
61	>	} catch (ExecutionException t) {
62	>	assertSame(exInfo, t.getCause());
63	>	} catch (Throwable t) {
64	>	threadUnexpectedException(t);
65	>	}
66	>	assertTrue(f.isDone());
67	>	}
68	>	}
69	>
70	>	void checkNotDone(Future<?> f) {
71	>	assertFalse(f.isDone());
72	>	assertFalse(f.isCancelled());
73	>	if (f instanceof PublicFutureTask) {
74	>	PublicFutureTask pf = (PublicFutureTask) f;
75	>	assertEquals(0, pf.doneCount());
76	>	assertEquals(0, pf.setCount());
77	>	assertEquals(0, pf.setExceptionCount());
78	>	}
79	>	}
80	>
81	>	void checkIsRunning(Future<?> f) {
82	>	checkNotDone(f);
83	>	if (f instanceof FutureTask) {
84	>	FutureTask ft = (FutureTask<?>) f;
85	>	// Check that run methods do nothing
86	>	ft.run();
87	>	if (f instanceof PublicFutureTask) {
88	>	PublicFutureTask pf = (PublicFutureTask) f;
89	>	int savedRunCount = pf.runCount();
90	>	pf.run();
91	>	assertFalse(pf.runAndReset());
92	>	assertEquals(savedRunCount, pf.runCount());
93	>	}
94	>	checkNotDone(f);
95	>	}
96	>	}
97	>
98	>	<T> void checkCompletedNormally(Future<T> f, T expected) {
99	>	checkIsDone(f);
100	>	assertFalse(f.isCancelled());
101	>
102	>	try {
103	>	assertSame(expected, f.get());
104	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
105	>	try {
106	>	assertSame(expected, f.get(5L, SECONDS));
107	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
108	>	}
109	>
110	>	void checkCancelled(Future<?> f) {
111	>	checkIsDone(f);
112	>	assertTrue(f.isCancelled());
113	>
114	>	try {
115	>	f.get();
116	>	shouldThrow();
117	>	} catch (CancellationException success) {
118	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
119	>
120	>	try {
121	>	f.get(5L, SECONDS);
122	>	shouldThrow();
123	>	} catch (CancellationException success) {
124	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
125	>	}
126	>
127	>	void tryToConfuseDoneTask(PublicFutureTask pf) {
128	>	pf.set(new Object());
129	>	pf.setException(new Error());
130	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
131	>	pf.cancel(true);
132	>	}
133	>	}
134	>
135	>	void checkCompletedAbnormally(Future<?> f, Throwable t) {
136	>	checkIsDone(f);
137	>	assertFalse(f.isCancelled());
138	>
139	>	try {
140	>	f.get();
141	>	shouldThrow();
142	>	} catch (ExecutionException success) {
143	>	assertSame(t, success.getCause());
144	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
145	>
146	>	try {
147	>	f.get(5L, SECONDS);
148	>	shouldThrow();
149	>	} catch (ExecutionException success) {
150	>	assertSame(t, success.getCause());
151	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
152		}
153
154		/**
155		* Subclass to expose protected methods
156		*/
157		static class PublicFutureTask extends FutureTask {
158	<	public PublicFutureTask(Callable r) { super(r); }
159	<	public boolean runAndReset() { return super.runAndReset(); }
160	<	public void set(Object x) { super.set(x); }
161	<	public void setException(Throwable t) { super.setException(t); }
158	>	private final AtomicInteger runCount;
159	>	private final AtomicInteger doneCount = new AtomicInteger(0);
160	>	private final AtomicInteger runAndResetCount = new AtomicInteger(0);
161	>	private final AtomicInteger setCount = new AtomicInteger(0);
162	>	private final AtomicInteger setExceptionCount = new AtomicInteger(0);
163	>	public int runCount() { return runCount.get(); }
164	>	public int doneCount() { return doneCount.get(); }
165	>	public int runAndResetCount() { return runAndResetCount.get(); }
166	>	public int setCount() { return setCount.get(); }
167	>	public int setExceptionCount() { return setExceptionCount.get(); }
168	>
169	>	PublicFutureTask(Runnable runnable) {
170	>	this(runnable, seven);
171	>	}
172	>	PublicFutureTask(Runnable runnable, Object result) {
173	>	this(runnable, result, new AtomicInteger(0));
174	>	}
175	>	private PublicFutureTask(final Runnable runnable, Object result,
176	>	final AtomicInteger runCount) {
177	>	super(new Runnable() {
178	>	public void run() {
179	>	runCount.getAndIncrement();
180	>	runnable.run();
181	>	}}, result);
182	>	this.runCount = runCount;
183	>	}
184	>	PublicFutureTask(Callable callable) {
185	>	this(callable, new AtomicInteger(0));
186	>	}
187	>	private PublicFutureTask(final Callable callable,
188	>	final AtomicInteger runCount) {
189	>	super(new Callable() {
190	>	public Object call() throws Exception {
191	>	runCount.getAndIncrement();
192	>	return callable.call();
193	>	}});
194	>	this.runCount = runCount;
195	>	}
196	>	@Override public void done() {
197	>	assertTrue(isDone());
198	>	doneCount.incrementAndGet();
199	>	super.done();
200	>	}
201	>	@Override public boolean runAndReset() {
202	>	runAndResetCount.incrementAndGet();
203	>	return super.runAndReset();
204	>	}
205	>	@Override public void set(Object x) {
206	>	setCount.incrementAndGet();
207	>	super.set(x);
208	>	}
209	>	@Override public void setException(Throwable t) {
210	>	setExceptionCount.incrementAndGet();
211	>	super.setException(t);
212	>	}
213	>	}
214	>
215	>	class Counter extends CheckedRunnable {
216	>	final AtomicInteger count = new AtomicInteger(0);
217	>	public int get() { return count.get(); }
218	>	public void realRun() {
219	>	count.getAndIncrement();
220	>	}
221		}
222
223		/**
224	<	* Creating a future with a null callable throws NPE
224	>	* creating a future with a null callable throws NullPointerException
225		*/
226		public void testConstructor() {
227		try {
228	<	FutureTask task = new FutureTask(null);
228	>	new FutureTask(null);
229		shouldThrow();
230	<	}
39	<	catch(NullPointerException success) {
40	<	}
230	>	} catch (NullPointerException success) {}
231		}
232
233		/**
234	<	* creating a future with null runnable fails
234	>	* creating a future with null runnable throws NullPointerException
235		*/
236		public void testConstructor2() {
237		try {
238	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
238	>	new FutureTask(null, Boolean.TRUE);
239		shouldThrow();
240	<	}
51	<	catch(NullPointerException success) {
52	<	}
240	>	} catch (NullPointerException success) {}
241		}
242
243		/**
244		* isDone is true when a task completes
245		*/
246		public void testIsDone() {
247	<	FutureTask task = new FutureTask( new NoOpCallable());
248	<	task.run();
249	<	assertTrue(task.isDone());
250	<	assertFalse(task.isCancelled());
247	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
248	>	assertFalse(task.isDone());
249	>	task.run();
250	>	assertTrue(task.isDone());
251	>	checkCompletedNormally(task, Boolean.TRUE);
252	>	assertEquals(1, task.runCount());
253		}
254
255		/**
#	Line 67 | Line 257 | public class FutureTaskTest extends JSR1
257		*/
258		public void testRunAndReset() {
259		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
260	<	assertTrue(task.runAndReset());
261	<	assertFalse(task.isDone());
260	>	for (int i = 0; i < 3; i++) {
261	>	assertTrue(task.runAndReset());
262	>	checkNotDone(task);
263	>	assertEquals(i+1, task.runCount());
264	>	assertEquals(i+1, task.runAndResetCount());
265	>	assertEquals(0, task.setCount());
266	>	assertEquals(0, task.setExceptionCount());
267	>	}
268		}
269
270		/**
271		* runAndReset after cancellation fails
272		*/
273	<	public void testResetAfterCancel() {
274	<	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
275	<	assertTrue(task.cancel(false));
276	<	assertFalse(task.runAndReset());
277	<	assertTrue(task.isDone());
278	<	assertTrue(task.isCancelled());
273	>	public void testRunAndResetAfterCancel() {
274	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
275	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
276	>	assertTrue(task.cancel(mayInterruptIfRunning));
277	>	for (int i = 0; i < 3; i++) {
278	>	assertFalse(task.runAndReset());
279	>	assertEquals(0, task.runCount());
280	>	assertEquals(i+1, task.runAndResetCount());
281	>	assertEquals(0, task.setCount());
282	>	assertEquals(0, task.setExceptionCount());
283	>	}
284	>	tryToConfuseDoneTask(task);
285	>	checkCancelled(task);
286	>	}
287		}
288
85	–
86	–
289		/**
290	<	* setting value gauses get to return it
290	>	* setting value causes get to return it
291		*/
292	<	public void testSet() {
292	>	public void testSet() throws Exception {
293		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
294		task.set(one);
295	<	try {
296	<	assertEquals(task.get(), one);
297	<	}
298	<	catch(Exception e) {
299	<	unexpectedException();
300	<	}
295	>	for (int i = 0; i < 3; i++) {
296	>	assertSame(one, task.get());
297	>	assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS));
298	>	assertEquals(1, task.setCount());
299	>	}
300	>	tryToConfuseDoneTask(task);
301	>	checkCompletedNormally(task, one);
302	>	assertEquals(0, task.runCount());
303		}
304
305		/**
306		* setException causes get to throw ExecutionException
307		*/
308	<	public void testSetException() {
308	>	public void testSetException_get() throws Exception {
309		Exception nse = new NoSuchElementException();
310		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
311		task.setException(nse);
312	+
313		try {
314	<	Object x = task.get();
314	>	task.get();
315		shouldThrow();
316	+	} catch (ExecutionException success) {
317	+	assertSame(nse, success.getCause());
318	+	checkCompletedAbnormally(task, nse);
319		}
320	<	catch(ExecutionException ee) {
321	<	Throwable cause = ee.getCause();
322	<	assertEquals(cause, nse);
323	<	}
324	<	catch(Exception e) {
325	<	unexpectedException();
320	>
321	>	try {
322	>	task.get(LONG_DELAY_MS, MILLISECONDS);
323	>	shouldThrow();
324	>	} catch (ExecutionException success) {
325	>	assertSame(nse, success.getCause());
326	>	checkCompletedAbnormally(task, nse);
327		}
328	+
329	+	assertEquals(1, task.setExceptionCount());
330	+	assertEquals(0, task.setCount());
331	+	tryToConfuseDoneTask(task);
332	+	checkCompletedAbnormally(task, nse);
333	+	assertEquals(0, task.runCount());
334		}
335
336		/**
337	<	*  Cancelling before running succeeds
337	>	* cancel(false) before run succeeds
338		*/
339		public void testCancelBeforeRun() {
340	<	FutureTask task = new FutureTask( new NoOpCallable());
340	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
341		assertTrue(task.cancel(false));
342	<	task.run();
343	<	assertTrue(task.isDone());
344	<	assertTrue(task.isCancelled());
342	>	task.run();
343	>	assertEquals(0, task.runCount());
344	>	assertEquals(0, task.setCount());
345	>	assertEquals(0, task.setExceptionCount());
346	>	assertTrue(task.isCancelled());
347	>	assertTrue(task.isDone());
348	>	tryToConfuseDoneTask(task);
349	>	assertEquals(0, task.runCount());
350	>	checkCancelled(task);
351		}
352
353		/**
354	<	* Cancel(true) before run succeeds
354	>	* cancel(true) before run succeeds
355		*/
356		public void testCancelBeforeRun2() {
357	<	FutureTask task = new FutureTask( new NoOpCallable());
357	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
358		assertTrue(task.cancel(true));
359	<	task.run();
360	<	assertTrue(task.isDone());
361	<	assertTrue(task.isCancelled());
359	>	task.run();
360	>	assertEquals(0, task.runCount());
361	>	assertEquals(0, task.setCount());
362	>	assertEquals(0, task.setExceptionCount());
363	>	assertTrue(task.isCancelled());
364	>	assertTrue(task.isDone());
365	>	tryToConfuseDoneTask(task);
366	>	assertEquals(0, task.runCount());
367	>	checkCancelled(task);
368		}
369
370		/**
371	<	* cancel of a completed task fails
371	>	* cancel(false) of a completed task fails
372		*/
373		public void testCancelAfterRun() {
374	<	FutureTask task = new FutureTask( new NoOpCallable());
375	<	task.run();
374	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
375	>	task.run();
376		assertFalse(task.cancel(false));
377	<	assertTrue(task.isDone());
378	<	assertFalse(task.isCancelled());
377	>	assertEquals(1, task.runCount());
378	>	assertEquals(1, task.setCount());
379	>	assertEquals(0, task.setExceptionCount());
380	>	tryToConfuseDoneTask(task);
381	>	checkCompletedNormally(task, Boolean.TRUE);
382	>	assertEquals(1, task.runCount());
383	>	}
384	>
385	>	/**
386	>	* cancel(true) of a completed task fails
387	>	*/
388	>	public void testCancelAfterRun2() {
389	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
390	>	task.run();
391	>	assertFalse(task.cancel(true));
392	>	assertEquals(1, task.runCount());
393	>	assertEquals(1, task.setCount());
394	>	assertEquals(0, task.setExceptionCount());
395	>	tryToConfuseDoneTask(task);
396	>	checkCompletedNormally(task, Boolean.TRUE);
397	>	assertEquals(1, task.runCount());
398		}
399
400		/**
401	<	* cancel(true) interrupts a running task
401	>	* cancel(true) interrupts a running task that subsequently succeeds
402		*/
403		public void testCancelInterrupt() {
404	<	FutureTask task = new FutureTask( new Callable() {
405	<	public Object call() {
404	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
405	>	final PublicFutureTask task =
406	>	new PublicFutureTask(new CheckedRunnable() {
407	>	public void realRun() {
408	>	pleaseCancel.countDown();
409		try {
410	<	Thread.sleep(MEDIUM_DELAY_MS);
411	<	threadShouldThrow();
412	<	}
413	<	catch (InterruptedException success) {}
414	<	return Boolean.TRUE;
415	<	} });
416	<	Thread t = new  Thread(task);
410	>	delay(LONG_DELAY_MS);
411	>	shouldThrow();
412	>	} catch (InterruptedException success) {}
413	>	}});
414	>
415	>	Thread t = newStartedThread(task);
416	>	await(pleaseCancel);
417	>	assertTrue(task.cancel(true));
418	>	assertTrue(task.isCancelled());
419	>	assertTrue(task.isDone());
420	>	awaitTermination(t);
421	>	assertEquals(1, task.runCount());
422	>	assertEquals(1, task.setCount());
423	>	assertEquals(0, task.setExceptionCount());
424	>	tryToConfuseDoneTask(task);
425	>	checkCancelled(task);
426	>	}
427	>
428	>	/**
429	>	* cancel(true) tries to interrupt a running task, but
430	>	* Thread.interrupt throws (simulating a restrictive security
431	>	* manager)
432	>	*/
433	>	public void testCancelInterrupt_ThrowsSecurityException() {
434	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
435	>	final CountDownLatch cancelled = new CountDownLatch(1);
436	>	final PublicFutureTask task =
437	>	new PublicFutureTask(new CheckedRunnable() {
438	>	public void realRun() {
439	>	pleaseCancel.countDown();
440	>	await(cancelled);
441	>	assertFalse(Thread.interrupted());
442	>	}});
443	>
444	>	final Thread t = new Thread(task) {
445	>	// Simulate a restrictive security manager.
446	>	@Override public void interrupt() {
447	>	throw new SecurityException();
448	>	}};
449	>	t.setDaemon(true);
450		t.start();
451	<
451	>
452	>	await(pleaseCancel);
453		try {
454	<	Thread.sleep(SHORT_DELAY_MS);
455	<	assertTrue(task.cancel(true));
456	<	t.join();
457	<	assertTrue(task.isDone());
458	<	assertTrue(task.isCancelled());
459	<	} catch(InterruptedException e){
460	<	unexpectedException();
461	<	}
454	>	task.cancel(true);
455	>	shouldThrow();
456	>	} catch (SecurityException expected) {}
457	>
458	>	// We failed to deliver the interrupt, but the world retains
459	>	// its sanity, as if we had done task.cancel(false)
460	>	assertTrue(task.isCancelled());
461	>	assertTrue(task.isDone());
462	>	assertEquals(1, task.runCount());
463	>	assertEquals(1, task.doneCount());
464	>	assertEquals(0, task.setCount());
465	>	assertEquals(0, task.setExceptionCount());
466	>	cancelled.countDown();
467	>	awaitTermination(t);
468	>	assertEquals(1, task.setCount());
469	>	assertEquals(0, task.setExceptionCount());
470	>	tryToConfuseDoneTask(task);
471	>	checkCancelled(task);
472		}
473
474	+	/**
475	+	* cancel(true) interrupts a running task that subsequently throws
476	+	*/
477	+	public void testCancelInterrupt_taskFails() {
478	+	final CountDownLatch pleaseCancel = new CountDownLatch(1);
479	+	final PublicFutureTask task =
480	+	new PublicFutureTask(new Runnable() {
481	+	public void run() {
482	+	try {
483	+	pleaseCancel.countDown();
484	+	delay(LONG_DELAY_MS);
485	+	threadShouldThrow();
486	+	} catch (InterruptedException success) {
487	+	} catch (Throwable t) { threadUnexpectedException(t); }
488	+	throw new RuntimeException();
489	+	}});
490	+
491	+	Thread t = newStartedThread(task);
492	+	await(pleaseCancel);
493	+	assertTrue(task.cancel(true));
494	+	assertTrue(task.isCancelled());
495	+	awaitTermination(t);
496	+	assertEquals(1, task.runCount());
497	+	assertEquals(0, task.setCount());
498	+	assertEquals(1, task.setExceptionCount());
499	+	tryToConfuseDoneTask(task);
500	+	checkCancelled(task);
501	+	}
502
503		/**
504		* cancel(false) does not interrupt a running task
505		*/
506		public void testCancelNoInterrupt() {
507	<	FutureTask task = new FutureTask( new Callable() {
508	<	public Object call() {
509	<	try {
510	<	Thread.sleep(MEDIUM_DELAY_MS);
511	<	}
512	<	catch (InterruptedException success) {
513	<	threadFail("should not interrupt");
514	<	}
507	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
508	>	final CountDownLatch cancelled = new CountDownLatch(1);
509	>	final PublicFutureTask task =
510	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
511	>	public Boolean realCall() {
512	>	pleaseCancel.countDown();
513	>	await(cancelled);
514	>	assertFalse(Thread.interrupted());
515		return Boolean.TRUE;
516	<	} });
517	<	Thread t = new  Thread(task);
518	<	t.start();
519	<
520	<	try {
521	<	Thread.sleep(SHORT_DELAY_MS);
522	<	assertTrue(task.cancel(false));
523	<	t.join();
524	<	assertTrue(task.isDone());
525	<	assertTrue(task.isCancelled());
526	<	} catch(InterruptedException e){
527	<	unexpectedException();
528	<	}
516	>	}});
517	>
518	>	Thread t = newStartedThread(task);
519	>	await(pleaseCancel);
520	>	assertTrue(task.cancel(false));
521	>	assertTrue(task.isCancelled());
522	>	cancelled.countDown();
523	>	awaitTermination(t);
524	>	assertEquals(1, task.runCount());
525	>	assertEquals(1, task.setCount());
526	>	assertEquals(0, task.setExceptionCount());
527	>	tryToConfuseDoneTask(task);
528	>	checkCancelled(task);
529	>	}
530	>
531	>	/**
532	>	* run in one thread causes get in another thread to retrieve value
533	>	*/
534	>	public void testGetRun() {
535	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
536	>
537	>	final PublicFutureTask task =
538	>	new PublicFutureTask(new CheckedCallable<Object>() {
539	>	public Object realCall() {
540	>	return two;
541	>	}});
542	>
543	>	Thread t1 = newStartedThread(new CheckedRunnable() {
544	>	public void realRun() throws Exception {
545	>	pleaseRun.countDown();
546	>	assertSame(two, task.get());
547	>	}});
548	>
549	>	Thread t2 = newStartedThread(new CheckedRunnable() {
550	>	public void realRun() throws Exception {
551	>	pleaseRun.countDown();
552	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
553	>	}});
554	>
555	>	await(pleaseRun);
556	>	checkNotDone(task);
557	>	assertTrue(t1.isAlive());
558	>	assertTrue(t2.isAlive());
559	>	task.run();
560	>	checkCompletedNormally(task, two);
561	>	assertEquals(1, task.runCount());
562	>	assertEquals(1, task.setCount());
563	>	assertEquals(0, task.setExceptionCount());
564	>	awaitTermination(t1);
565	>	awaitTermination(t2);
566	>	tryToConfuseDoneTask(task);
567	>	checkCompletedNormally(task, two);
568		}
569
570		/**
571		* set in one thread causes get in another thread to retrieve value
572		*/
573	<	public void testGet1() {
574	<	final FutureTask ft = new FutureTask(new Callable() {
575	<	public Object call() {
576	<	try {
577	<	Thread.sleep(MEDIUM_DELAY_MS);
578	<	} catch(InterruptedException e){
579	<	threadUnexpectedException();
580	<	}
581	<	return Boolean.TRUE;
582	<	}
583	<	});
584	<	Thread t = new Thread(new Runnable() {
585	<	public void run() {
586	<	try {
587	<	ft.get();
588	<	} catch(Exception e){
589	<	threadUnexpectedException();
590	<	}
591	<	}
592	<	});
593	<	try {
594	<	assertFalse(ft.isDone());
595	<	assertFalse(ft.isCancelled());
596	<	t.start();
597	<	Thread.sleep(SHORT_DELAY_MS);
598	<	ft.run();
599	<	t.join();
600	<	assertTrue(ft.isDone());
601	<	assertFalse(ft.isCancelled());
602	<	} catch(InterruptedException e){
603	<	unexpectedException();
604	<
605	<	}
573	>	public void testGetSet() {
574	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
575	>
576	>	final PublicFutureTask task =
577	>	new PublicFutureTask(new CheckedCallable<Object>() {
578	>	public Object realCall() throws InterruptedException {
579	>	return two;
580	>	}});
581	>
582	>	Thread t1 = newStartedThread(new CheckedRunnable() {
583	>	public void realRun() throws Exception {
584	>	pleaseSet.countDown();
585	>	assertSame(two, task.get());
586	>	}});
587	>
588	>	Thread t2 = newStartedThread(new CheckedRunnable() {
589	>	public void realRun() throws Exception {
590	>	pleaseSet.countDown();
591	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
592	>	}});
593	>
594	>	await(pleaseSet);
595	>	checkNotDone(task);
596	>	assertTrue(t1.isAlive());
597	>	assertTrue(t2.isAlive());
598	>	task.set(two);
599	>	assertEquals(0, task.runCount());
600	>	assertEquals(1, task.setCount());
601	>	assertEquals(0, task.setExceptionCount());
602	>	tryToConfuseDoneTask(task);
603	>	checkCompletedNormally(task, two);
604	>	awaitTermination(t1);
605	>	awaitTermination(t2);
606		}
607
608		/**
609	<	* set in one thread causes timed get in another thread to retrieve value
610	<	*/
611	<	public void testTimedGet1() {
612	<	final FutureTask ft = new FutureTask(new Callable() {
613	<	public Object call() {
614	<	try {
615	<	Thread.sleep(MEDIUM_DELAY_MS);
616	<	} catch(InterruptedException e){
617	<	threadUnexpectedException();
618	<	}
619	<	return Boolean.TRUE;
620	<	}
621	<	});
622	<	Thread t = new Thread(new Runnable() {
623	<	public void run() {
624	<	try {
625	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
626	<	} catch(TimeoutException success) {
627	<	} catch(Exception e){
628	<	threadUnexpectedException();
629	<	}
630	<	}
631	<	});
632	<	try {
633	<	assertFalse(ft.isDone());
634	<	assertFalse(ft.isCancelled());
635	<	t.start();
636	<	ft.run();
637	<	t.join();
638	<	assertTrue(ft.isDone());
639	<	assertFalse(ft.isCancelled());
640	<	} catch(InterruptedException e){
641	<	unexpectedException();
642	<
643	<	}
609	>	* Cancelling a task causes timed get in another thread to throw
610	>	* CancellationException
611	>	*/
612	>	public void testTimedGet_Cancellation() {
613	>	testTimedGet_Cancellation(false);
614	>	}
615	>	public void testTimedGet_Cancellation_interrupt() {
616	>	testTimedGet_Cancellation(true);
617	>	}
618	>	public void testTimedGet_Cancellation(final boolean mayInterruptIfRunning) {
619	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
620	>	final CountDownLatch cancelled = new CountDownLatch(1);
621	>	final Callable<Object> callable =
622	>	new CheckedCallable<Object>() {
623	>	public Object realCall() throws InterruptedException {
624	>	pleaseCancel.countDown();
625	>	if (mayInterruptIfRunning) {
626	>	try {
627	>	delay(2*LONG_DELAY_MS);
628	>	} catch (InterruptedException success) {}
629	>	} else {
630	>	await(cancelled);
631	>	}
632	>	return two;
633	>	}};
634	>	final PublicFutureTask task = new PublicFutureTask(callable);
635	>
636	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
637	>	public void realRun() throws Exception {
638	>	pleaseCancel.countDown();
639	>	task.get();
640	>	}};
641	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
642	>	public void realRun() throws Exception {
643	>	pleaseCancel.countDown();
644	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
645	>	}};
646	>	t1.start();
647	>	t2.start();
648	>	Thread t3 = newStartedThread(task);
649	>	await(pleaseCancel);
650	>	checkIsRunning(task);
651	>	task.cancel(mayInterruptIfRunning);
652	>	checkCancelled(task);
653	>	awaitTermination(t1);
654	>	awaitTermination(t2);
655	>	cancelled.countDown();
656	>	awaitTermination(t3);
657	>	assertEquals(1, task.runCount());
658	>	assertEquals(1, task.setCount());
659	>	assertEquals(0, task.setExceptionCount());
660	>	tryToConfuseDoneTask(task);
661	>	checkCancelled(task);
662		}
663
664		/**
665	<	*  Cancelling a task causes timed get in another thread to throw CancellationException
665	>	* A runtime exception in task causes get to throw ExecutionException
666		*/
667	<	public void testTimedGet_Cancellation() {
668	<	final FutureTask ft = new FutureTask(new Callable() {
669	<	public Object call() {
670	<	try {
671	<	Thread.sleep(SMALL_DELAY_MS);
672	<	threadShouldThrow();
673	<	} catch(InterruptedException e) {
674	<	}
675	<	return Boolean.TRUE;
676	<	}
677	<	});
678	<	try {
679	<	Thread t1 = new Thread(new Runnable() {
680	<	public void run() {
681	<	try {
682	<	ft.get(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
683	<	threadShouldThrow();
684	<	} catch(CancellationException success) {}
307	<	catch(Exception e){
308	<	threadUnexpectedException();
309	<	}
310	<	}
311	<	});
312	<	Thread t2 = new Thread(ft);
313	<	t1.start();
314	<	t2.start();
315	<	Thread.sleep(SHORT_DELAY_MS);
316	<	ft.cancel(true);
317	<	t1.join();
318	<	t2.join();
319	<	} catch(InterruptedException ie){
320	<	unexpectedException();
667	>	public void testGet_ExecutionException() throws InterruptedException {
668	>	final ArithmeticException e = new ArithmeticException();
669	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
670	>	public Object call() {
671	>	throw e;
672	>	}});
673	>
674	>	task.run();
675	>	assertEquals(1, task.runCount());
676	>	assertEquals(0, task.setCount());
677	>	assertEquals(1, task.setExceptionCount());
678	>	try {
679	>	task.get();
680	>	shouldThrow();
681	>	} catch (ExecutionException success) {
682	>	assertSame(e, success.getCause());
683	>	tryToConfuseDoneTask(task);
684	>	checkCompletedAbnormally(task, success.getCause());
685		}
686		}
687
688		/**
689	<	* Cancelling a task causes get in another thread to throw CancellationException
690	<	*/
691	<	public void testGet_Cancellation() {
692	<	final FutureTask ft = new FutureTask(new Callable() {
693	<	public Object call() {
694	<	try {
695	<	Thread.sleep(MEDIUM_DELAY_MS);
696	<	threadShouldThrow();
697	<	} catch(InterruptedException e){
698	<	}
699	<	return Boolean.TRUE;
700	<	}
701	<	});
702	<	try {
703	<	Thread t1 = new Thread(new Runnable() {
704	<	public void run() {
705	<	try {
342	<	ft.get();
343	<	threadShouldThrow();
344	<	} catch(CancellationException success){
345	<	}
346	<	catch(Exception e){
347	<	threadUnexpectedException();
348	<	}
349	<	}
350	<	});
351	<	Thread t2 = new Thread(ft);
352	<	t1.start();
353	<	t2.start();
354	<	Thread.sleep(SHORT_DELAY_MS);
355	<	ft.cancel(true);
356	<	t1.join();
357	<	t2.join();
358	<	} catch(InterruptedException success){
359	<	unexpectedException();
689	>	* A runtime exception in task causes timed get to throw ExecutionException
690	>	*/
691	>	public void testTimedGet_ExecutionException2() throws Exception {
692	>	final ArithmeticException e = new ArithmeticException();
693	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
694	>	public Object call() {
695	>	throw e;
696	>	}});
697	>
698	>	task.run();
699	>	try {
700	>	task.get(LONG_DELAY_MS, MILLISECONDS);
701	>	shouldThrow();
702	>	} catch (ExecutionException success) {
703	>	assertSame(e, success.getCause());
704	>	tryToConfuseDoneTask(task);
705	>	checkCompletedAbnormally(task, success.getCause());
706		}
707		}
362	–
708
709		/**
710	<	* A runtime exception in task causes get to throw ExecutionException
710	>	* get is interruptible
711	>	*/
712	>	public void testGet_interruptible() {
713	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
714	>	final FutureTask task = new FutureTask(new NoOpCallable());
715	>	Thread t = newStartedThread(new CheckedRunnable() {
716	>	public void realRun() throws Exception {
717	>	Thread.currentThread().interrupt();
718	>	try {
719	>	task.get();
720	>	shouldThrow();
721	>	} catch (InterruptedException success) {}
722	>	assertFalse(Thread.interrupted());
723	>
724	>	pleaseInterrupt.countDown();
725	>	try {
726	>	task.get();
727	>	shouldThrow();
728	>	} catch (InterruptedException success) {}
729	>	assertFalse(Thread.interrupted());
730	>	}});
731	>
732	>	await(pleaseInterrupt);
733	>	t.interrupt();
734	>	awaitTermination(t);
735	>	checkNotDone(task);
736	>	}
737	>
738	>	/**
739	>	* timed get is interruptible
740	>	*/
741	>	public void testTimedGet_interruptible() {
742	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
743	>	final FutureTask task = new FutureTask(new NoOpCallable());
744	>	Thread t = newStartedThread(new CheckedRunnable() {
745	>	public void realRun() throws Exception {
746	>	Thread.currentThread().interrupt();
747	>	try {
748	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
749	>	shouldThrow();
750	>	} catch (InterruptedException success) {}
751	>	assertFalse(Thread.interrupted());
752	>
753	>	pleaseInterrupt.countDown();
754	>	try {
755	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
756	>	shouldThrow();
757	>	} catch (InterruptedException success) {}
758	>	assertFalse(Thread.interrupted());
759	>	}});
760	>
761	>	await(pleaseInterrupt);
762	>	t.interrupt();
763	>	awaitTermination(t);
764	>	checkNotDone(task);
765	>	}
766	>
767	>	/**
768	>	* A timed out timed get throws TimeoutException
769		*/
770	<	public void testGet_ExecutionException() {
771	<	final FutureTask ft = new FutureTask(new Callable() {
772	<	public Object call() {
773	<	int i = 5/0;
774	<	return Boolean.TRUE;
775	<	}
776	<	});
777	<	try {
375	<	ft.run();
376	<	ft.get();
377	<	shouldThrow();
378	<	} catch(ExecutionException success){
379	<	}
380	<	catch(Exception e){
381	<	unexpectedException();
382	<	}
383	<	}
384	<
385	<	/**
386	<	*  A runtime exception in task causes timed get to throw ExecutionException
387	<	*/
388	<	public void testTimedGet_ExecutionException2() {
389	<	final FutureTask ft = new FutureTask(new Callable() {
390	<	public Object call() {
391	<	int i = 5/0;
392	<	return Boolean.TRUE;
393	<	}
394	<	});
395	<	try {
396	<	ft.run();
397	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
398	<	shouldThrow();
399	<	} catch(ExecutionException success) {
400	<	} catch(TimeoutException success) { } // unlikely but OK
401	<	catch(Exception e){
402	<	unexpectedException();
403	<	}
404	<	}
405	<
406	<
407	<	/**
408	<	* Interrupting a waiting get causes it to throw InterruptedException
409	<	*/
410	<	public void testGet_InterruptedException() {
411	<	final FutureTask ft = new FutureTask(new NoOpCallable());
412	<	Thread t = new Thread(new Runnable() {
413	<	public void run() {
414	<	try {
415	<	ft.get();
416	<	threadShouldThrow();
417	<	} catch(InterruptedException success){
418	<	} catch(Exception e){
419	<	threadUnexpectedException();
420	<	}
421	<	}
422	<	});
423	<	try {
424	<	t.start();
425	<	Thread.sleep(SHORT_DELAY_MS);
426	<	t.interrupt();
427	<	t.join();
428	<	} catch(Exception e){
429	<	unexpectedException();
430	<	}
431	<	}
432	<
433	<	/**
434	<	*  Interrupting a waiting timed get causes it to throw InterruptedException
435	<	*/
436	<	public void testTimedGet_InterruptedException2() {
437	<	final FutureTask ft = new FutureTask(new NoOpCallable());
438	<	Thread t = new Thread(new Runnable() {
439	<	public void run() {
440	<	try {
441	<	ft.get(LONG_DELAY_MS,TimeUnit.MILLISECONDS);
442	<	threadShouldThrow();
443	<	} catch(InterruptedException success){}
444	<	catch(Exception e){
445	<	threadUnexpectedException();
446	<	}
447	<	}
448	<	});
449	<	try {
450	<	t.start();
451	<	Thread.sleep(SHORT_DELAY_MS);
452	<	t.interrupt();
453	<	t.join();
454	<	} catch(Exception e){
455	<	unexpectedException();
770	>	public void testGet_TimeoutException() throws Exception {
771	>	FutureTask task = new FutureTask(new NoOpCallable());
772	>	long startTime = System.nanoTime();
773	>	try {
774	>	task.get(timeoutMillis(), MILLISECONDS);
775	>	shouldThrow();
776	>	} catch (TimeoutException success) {
777	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
778		}
779		}
780	<
780	>
781		/**
782	<	* A timed out timed get throws TimeoutException
782	>	* timed get with null TimeUnit throws NullPointerException
783		*/
784	<	public void testGet_TimeoutException() {
785	<	try {
786	<	FutureTask ft = new FutureTask(new NoOpCallable());
787	<	ft.get(1,TimeUnit.MILLISECONDS);
788	<	shouldThrow();
789	<	} catch(TimeoutException success){}
790	<	catch(Exception success){
791	<	unexpectedException();
792	<	}
784	>	public void testGet_NullTimeUnit() throws Exception {
785	>	FutureTask task = new FutureTask(new NoOpCallable());
786	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
787	>
788	>	for (long timeout : timeouts) {
789	>	try {
790	>	task.get(timeout, null);
791	>	shouldThrow();
792	>	} catch (NullPointerException success) {}
793	>	}
794	>
795	>	task.run();
796	>
797	>	for (long timeout : timeouts) {
798	>	try {
799	>	task.get(timeout, null);
800	>	shouldThrow();
801	>	} catch (NullPointerException success) {}
802	>	}
803		}
804	<
804	>
805	>	/**
806	>	* timed get with most negative timeout works correctly (i.e. no
807	>	* underflow bug)
808	>	*/
809	>	public void testGet_NegativeInfinityTimeout() throws Exception {
810	>	final ExecutorService pool = Executors.newFixedThreadPool(10);
811	>	final Runnable nop = new Runnable() { public void run() {}};
812	>	final FutureTask<Void> task = new FutureTask<>(nop, null);
813	>	final List<Future<?>> futures = new ArrayList<>();
814	>	Runnable r = new Runnable() { public void run() {
815	>	for (long timeout : new long[] { 0L, -1L, Long.MIN_VALUE }) {
816	>	try {
817	>	task.get(timeout, NANOSECONDS);
818	>	shouldThrow();
819	>	} catch (TimeoutException success) {
820	>	} catch (Throwable fail) {threadUnexpectedException(fail);}}}};
821	>	for (int i = 0; i < 10; i++)
822	>	futures.add(pool.submit(r));
823	>	try {
824	>	joinPool(pool);
825	>	for (Future<?> future : futures)
826	>	checkCompletedNormally(future, null);
827	>	} finally {
828	>	task.run();         // last resort to help terminate
829	>	}
830	>	}
831	>
832		}

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