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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.14 by jsr166, Mon Nov 16 05:30:07 2009 UTC vs.
Revision 1.37 by jsr166, Sun Apr 21 06:54:11 2013 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	<	import java.util.concurrent.*;
10	>	import java.util.concurrent.Callable;
11	>	import java.util.concurrent.CancellationException;
12	>	import java.util.concurrent.CountDownLatch;
13	>	import java.util.concurrent.ExecutionException;
14	>	import java.util.concurrent.Future;
15	>	import java.util.concurrent.FutureTask;
16	>	import java.util.concurrent.TimeoutException;
17	>	import java.util.concurrent.atomic.AtomicInteger;
18	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
19	>	import static java.util.concurrent.TimeUnit.SECONDS;
20		import java.util.*;
21
22		public class FutureTaskTest extends JSR166TestCase {
23
24		public static void main(String[] args) {
25	<	junit.textui.TestRunner.run (suite());
25	>	junit.textui.TestRunner.run(suite());
26		}
27		public static Test suite() {
28	<	return new TestSuite(FutureTaskTest.class);
28	>	return new TestSuite(FutureTaskTest.class);
29	>	}
30	>
31	>	void checkIsDone(Future<?> f) {
32	>	assertTrue(f.isDone());
33	>	assertFalse(f.cancel(false));
34	>	assertFalse(f.cancel(true));
35	>	if (f instanceof PublicFutureTask) {
36	>	PublicFutureTask pf = (PublicFutureTask) f;
37	>	assertEquals(1, pf.doneCount());
38	>	assertFalse(pf.runAndReset());
39	>	assertEquals(1, pf.doneCount());
40	>	Object r = null; Object exInfo = null;
41	>	try {
42	>	r = f.get();
43	>	} catch (CancellationException t) {
44	>	exInfo = CancellationException.class;
45	>	} catch (ExecutionException t) {
46	>	exInfo = t.getCause();
47	>	} catch (Throwable t) {
48	>	threadUnexpectedException(t);
49	>	}
50	>
51	>	// Check that run and runAndReset have no effect.
52	>	int savedRunCount = pf.runCount();
53	>	pf.run();
54	>	pf.runAndReset();
55	>	assertEquals(savedRunCount, pf.runCount());
56	>	try {
57	>	assertSame(r, f.get());
58	>	} catch (CancellationException t) {
59	>	assertSame(exInfo, CancellationException.class);
60	>	} catch (ExecutionException t) {
61	>	assertSame(exInfo, t.getCause());
62	>	} catch (Throwable t) {
63	>	threadUnexpectedException(t);
64	>	}
65	>	assertTrue(f.isDone());
66	>	}
67	>	}
68	>
69	>	void checkNotDone(Future<?> f) {
70	>	assertFalse(f.isDone());
71	>	assertFalse(f.isCancelled());
72	>	if (f instanceof PublicFutureTask) {
73	>	PublicFutureTask pf = (PublicFutureTask) f;
74	>	assertEquals(0, pf.doneCount());
75	>	assertEquals(0, pf.setCount());
76	>	assertEquals(0, pf.setExceptionCount());
77	>	}
78	>	}
79	>
80	>	void checkIsRunning(Future<?> f) {
81	>	checkNotDone(f);
82	>	if (f instanceof FutureTask) {
83	>	FutureTask ft = (FutureTask<?>) f;
84	>	// Check that run methods do nothing
85	>	ft.run();
86	>	if (f instanceof PublicFutureTask) {
87	>	PublicFutureTask pf = (PublicFutureTask) f;
88	>	int savedRunCount = pf.runCount();
89	>	pf.run();
90	>	assertFalse(pf.runAndReset());
91	>	assertEquals(savedRunCount, pf.runCount());
92	>	}
93	>	checkNotDone(f);
94	>	}
95	>	}
96	>
97	>	<T> void checkCompletedNormally(Future<T> f, T expected) {
98	>	checkIsDone(f);
99	>	assertFalse(f.isCancelled());
100	>
101	>	try {
102	>	assertSame(expected, f.get());
103	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
104	>	try {
105	>	assertSame(expected, f.get(5L, SECONDS));
106	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
107	>	}
108	>
109	>	void checkCancelled(Future<?> f) {
110	>	checkIsDone(f);
111	>	assertTrue(f.isCancelled());
112	>
113	>	try {
114	>	f.get();
115	>	shouldThrow();
116	>	} catch (CancellationException success) {
117	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
118	>
119	>	try {
120	>	f.get(5L, SECONDS);
121	>	shouldThrow();
122	>	} catch (CancellationException success) {
123	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
124	>	}
125	>
126	>	void tryToConfuseDoneTask(PublicFutureTask pf) {
127	>	pf.set(new Object());
128	>	pf.setException(new Error());
129	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
130	>	pf.cancel(true);
131	>	}
132	>	}
133	>
134	>	void checkCompletedAbnormally(Future<?> f, Throwable t) {
135	>	checkIsDone(f);
136	>	assertFalse(f.isCancelled());
137	>
138	>	try {
139	>	f.get();
140	>	shouldThrow();
141	>	} catch (ExecutionException success) {
142	>	assertSame(t, success.getCause());
143	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
144	>
145	>	try {
146	>	f.get(5L, SECONDS);
147	>	shouldThrow();
148	>	} catch (ExecutionException success) {
149	>	assertSame(t, success.getCause());
150	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
151		}
152
153		/**
154		* Subclass to expose protected methods
155		*/
156		static class PublicFutureTask extends FutureTask {
157	<	public PublicFutureTask(Callable r) { super(r); }
158	<	public boolean runAndReset() { return super.runAndReset(); }
159	<	public void set(Object x) { super.set(x); }
160	<	public void setException(Throwable t) { super.setException(t); }
157	>	private final AtomicInteger runCount;
158	>	private final AtomicInteger doneCount = new AtomicInteger(0);
159	>	private final AtomicInteger runAndResetCount = new AtomicInteger(0);
160	>	private final AtomicInteger setCount = new AtomicInteger(0);
161	>	private final AtomicInteger setExceptionCount = new AtomicInteger(0);
162	>	public int runCount() { return runCount.get(); }
163	>	public int doneCount() { return doneCount.get(); }
164	>	public int runAndResetCount() { return runAndResetCount.get(); }
165	>	public int setCount() { return setCount.get(); }
166	>	public int setExceptionCount() { return setExceptionCount.get(); }
167	>
168	>	PublicFutureTask(Runnable runnable) {
169	>	this(runnable, seven);
170	>	}
171	>	PublicFutureTask(Runnable runnable, Object result) {
172	>	this(runnable, result, new AtomicInteger(0));
173	>	}
174	>	private PublicFutureTask(final Runnable runnable, Object result,
175	>	final AtomicInteger runCount) {
176	>	super(new Runnable() {
177	>	public void run() {
178	>	runCount.getAndIncrement();
179	>	runnable.run();
180	>	}}, result);
181	>	this.runCount = runCount;
182	>	}
183	>	PublicFutureTask(Callable callable) {
184	>	this(callable, new AtomicInteger(0));
185	>	}
186	>	private PublicFutureTask(final Callable callable,
187	>	final AtomicInteger runCount) {
188	>	super(new Callable() {
189	>	public Object call() throws Exception {
190	>	runCount.getAndIncrement();
191	>	return callable.call();
192	>	}});
193	>	this.runCount = runCount;
194	>	}
195	>	@Override public void done() {
196	>	assertTrue(isDone());
197	>	doneCount.incrementAndGet();
198	>	super.done();
199	>	}
200	>	@Override public boolean runAndReset() {
201	>	runAndResetCount.incrementAndGet();
202	>	return super.runAndReset();
203	>	}
204	>	@Override public void set(Object x) {
205	>	setCount.incrementAndGet();
206	>	super.set(x);
207	>	}
208	>	@Override public void setException(Throwable t) {
209	>	setExceptionCount.incrementAndGet();
210	>	super.setException(t);
211	>	}
212	>	}
213	>
214	>	class Counter extends CheckedRunnable {
215	>	final AtomicInteger count = new AtomicInteger(0);
216	>	public int get() { return count.get(); }
217	>	public void realRun() {
218	>	count.getAndIncrement();
219	>	}
220		}
221
222		/**
223	<	* Creating a future with a null callable throws NPE
223	>	* creating a future with a null callable throws NullPointerException
224		*/
225		public void testConstructor() {
226		try {
227	<	FutureTask task = new FutureTask(null);
227	>	new FutureTask(null);
228		shouldThrow();
229	<	}
40	<	catch (NullPointerException success) {
41	<	}
229	>	} catch (NullPointerException success) {}
230		}
231
232		/**
233	<	* creating a future with null runnable fails
233	>	* creating a future with null runnable throws NullPointerException
234		*/
235		public void testConstructor2() {
236		try {
237	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
237	>	new FutureTask(null, Boolean.TRUE);
238		shouldThrow();
239	<	}
52	<	catch (NullPointerException success) {
53	<	}
239	>	} catch (NullPointerException success) {}
240		}
241
242		/**
243		* isDone is true when a task completes
244		*/
245		public void testIsDone() {
246	<	FutureTask task = new FutureTask( new NoOpCallable());
247	<	task.run();
248	<	assertTrue(task.isDone());
249	<	assertFalse(task.isCancelled());
246	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
247	>	assertFalse(task.isDone());
248	>	task.run();
249	>	assertTrue(task.isDone());
250	>	checkCompletedNormally(task, Boolean.TRUE);
251	>	assertEquals(1, task.runCount());
252		}
253
254		/**
#	Line 68 | Line 256 | public class FutureTaskTest extends JSR1
256		*/
257		public void testRunAndReset() {
258		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
259	<	assertTrue(task.runAndReset());
260	<	assertFalse(task.isDone());
259	>	for (int i = 0; i < 3; i++) {
260	>	assertTrue(task.runAndReset());
261	>	checkNotDone(task);
262	>	assertEquals(i+1, task.runCount());
263	>	assertEquals(i+1, task.runAndResetCount());
264	>	assertEquals(0, task.setCount());
265	>	assertEquals(0, task.setExceptionCount());
266	>	}
267		}
268
269		/**
270		* runAndReset after cancellation fails
271		*/
272	<	public void testResetAfterCancel() {
273	<	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
274	<	assertTrue(task.cancel(false));
275	<	assertFalse(task.runAndReset());
276	<	assertTrue(task.isDone());
277	<	assertTrue(task.isCancelled());
272	>	public void testRunAndResetAfterCancel() {
273	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
274	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
275	>	assertTrue(task.cancel(mayInterruptIfRunning));
276	>	for (int i = 0; i < 3; i++) {
277	>	assertFalse(task.runAndReset());
278	>	assertEquals(0, task.runCount());
279	>	assertEquals(i+1, task.runAndResetCount());
280	>	assertEquals(0, task.setCount());
281	>	assertEquals(0, task.setExceptionCount());
282	>	}
283	>	tryToConfuseDoneTask(task);
284	>	checkCancelled(task);
285	>	}
286		}
287
86	–
87	–
288		/**
289		* setting value causes get to return it
290		*/
291	<	public void testSet() {
291	>	public void testSet() throws Exception {
292		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
293		task.set(one);
294	<	try {
295	<	assertEquals(task.get(), one);
296	<	}
297	<	catch (Exception e) {
298	<	unexpectedException();
299	<	}
294	>	for (int i = 0; i < 3; i++) {
295	>	assertSame(one, task.get());
296	>	assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS));
297	>	assertEquals(1, task.setCount());
298	>	}
299	>	tryToConfuseDoneTask(task);
300	>	checkCompletedNormally(task, one);
301	>	assertEquals(0, task.runCount());
302		}
303
304		/**
305		* setException causes get to throw ExecutionException
306		*/
307	<	public void testSetException() {
307	>	public void testSetException_get() throws Exception {
308		Exception nse = new NoSuchElementException();
309		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
310		task.setException(nse);
311	+
312		try {
313	<	Object x = task.get();
313	>	task.get();
314		shouldThrow();
315	+	} catch (ExecutionException success) {
316	+	assertSame(nse, success.getCause());
317	+	checkCompletedAbnormally(task, nse);
318		}
319	<	catch (ExecutionException ee) {
320	<	Throwable cause = ee.getCause();
321	<	assertEquals(cause, nse);
322	<	}
323	<	catch (Exception e) {
324	<	unexpectedException();
319	>
320	>	try {
321	>	task.get(LONG_DELAY_MS, MILLISECONDS);
322	>	shouldThrow();
323	>	} catch (ExecutionException success) {
324	>	assertSame(nse, success.getCause());
325	>	checkCompletedAbnormally(task, nse);
326		}
327	+
328	+	assertEquals(1, task.setExceptionCount());
329	+	assertEquals(0, task.setCount());
330	+	tryToConfuseDoneTask(task);
331	+	checkCompletedAbnormally(task, nse);
332	+	assertEquals(0, task.runCount());
333		}
334
335		/**
336	<	*  Cancelling before running succeeds
336	>	* cancel(false) before run succeeds
337		*/
338		public void testCancelBeforeRun() {
339	<	FutureTask task = new FutureTask( new NoOpCallable());
339	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
340		assertTrue(task.cancel(false));
341	<	task.run();
342	<	assertTrue(task.isDone());
343	<	assertTrue(task.isCancelled());
341	>	task.run();
342	>	assertEquals(0, task.runCount());
343	>	assertEquals(0, task.setCount());
344	>	assertEquals(0, task.setExceptionCount());
345	>	assertTrue(task.isCancelled());
346	>	assertTrue(task.isDone());
347	>	tryToConfuseDoneTask(task);
348	>	assertEquals(0, task.runCount());
349	>	checkCancelled(task);
350		}
351
352		/**
353	<	* Cancel(true) before run succeeds
353	>	* cancel(true) before run succeeds
354		*/
355		public void testCancelBeforeRun2() {
356	<	FutureTask task = new FutureTask( new NoOpCallable());
356	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
357		assertTrue(task.cancel(true));
358	<	task.run();
359	<	assertTrue(task.isDone());
360	<	assertTrue(task.isCancelled());
358	>	task.run();
359	>	assertEquals(0, task.runCount());
360	>	assertEquals(0, task.setCount());
361	>	assertEquals(0, task.setExceptionCount());
362	>	assertTrue(task.isCancelled());
363	>	assertTrue(task.isDone());
364	>	tryToConfuseDoneTask(task);
365	>	assertEquals(0, task.runCount());
366	>	checkCancelled(task);
367		}
368
369		/**
370	<	* cancel of a completed task fails
370	>	* cancel(false) of a completed task fails
371		*/
372		public void testCancelAfterRun() {
373	<	FutureTask task = new FutureTask( new NoOpCallable());
374	<	task.run();
373	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
374	>	task.run();
375		assertFalse(task.cancel(false));
376	<	assertTrue(task.isDone());
377	<	assertFalse(task.isCancelled());
376	>	assertEquals(1, task.runCount());
377	>	assertEquals(1, task.setCount());
378	>	assertEquals(0, task.setExceptionCount());
379	>	tryToConfuseDoneTask(task);
380	>	checkCompletedNormally(task, Boolean.TRUE);
381	>	assertEquals(1, task.runCount());
382		}
383
384		/**
385	<	* cancel(true) interrupts a running task
385	>	* cancel(true) of a completed task fails
386	>	*/
387	>	public void testCancelAfterRun2() {
388	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
389	>	task.run();
390	>	assertFalse(task.cancel(true));
391	>	assertEquals(1, task.runCount());
392	>	assertEquals(1, task.setCount());
393	>	assertEquals(0, task.setExceptionCount());
394	>	tryToConfuseDoneTask(task);
395	>	checkCompletedNormally(task, Boolean.TRUE);
396	>	assertEquals(1, task.runCount());
397	>	}
398	>
399	>	/**
400	>	* cancel(true) interrupts a running task that subsequently succeeds
401		*/
402		public void testCancelInterrupt() {
403	<	FutureTask task = new FutureTask( new Callable() {
404	<	public Object call() {
403	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
404	>	final PublicFutureTask task =
405	>	new PublicFutureTask(new CheckedRunnable() {
406	>	public void realRun() {
407	>	pleaseCancel.countDown();
408		try {
409	<	Thread.sleep(MEDIUM_DELAY_MS);
410	<	threadShouldThrow();
411	<	}
412	<	catch (InterruptedException success) {}
413	<	return Boolean.TRUE;
414	<	} });
415	<	Thread t = new  Thread(task);
409	>	delay(LONG_DELAY_MS);
410	>	shouldThrow();
411	>	} catch (InterruptedException success) {}
412	>	}});
413	>
414	>	Thread t = newStartedThread(task);
415	>	await(pleaseCancel);
416	>	assertTrue(task.cancel(true));
417	>	assertTrue(task.isCancelled());
418	>	assertTrue(task.isDone());
419	>	awaitTermination(t);
420	>	assertEquals(1, task.runCount());
421	>	assertEquals(1, task.setCount());
422	>	assertEquals(0, task.setExceptionCount());
423	>	tryToConfuseDoneTask(task);
424	>	checkCancelled(task);
425	>	}
426	>
427	>	/**
428	>	* cancel(true) tries to interrupt a running task, but
429	>	* Thread.interrupt throws (simulating a restrictive security
430	>	* manager)
431	>	*/
432	>	public void testCancelInterrupt_ThrowsSecurityException() {
433	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
434	>	final CountDownLatch cancelled = new CountDownLatch(1);
435	>	final PublicFutureTask task =
436	>	new PublicFutureTask(new CheckedRunnable() {
437	>	public void realRun() {
438	>	pleaseCancel.countDown();
439	>	await(cancelled);
440	>	assertFalse(Thread.interrupted());
441	>	}});
442	>
443	>	final Thread t = new Thread(task) {
444	>	// Simulate a restrictive security manager.
445	>	@Override public void interrupt() {
446	>	throw new SecurityException();
447	>	}};
448	>	t.setDaemon(true);
449		t.start();
450
451	+	await(pleaseCancel);
452		try {
453	<	Thread.sleep(SHORT_DELAY_MS);
454	<	assertTrue(task.cancel(true));
455	<	t.join();
175	<	assertTrue(task.isDone());
176	<	assertTrue(task.isCancelled());
177	<	} catch (InterruptedException e) {
178	<	unexpectedException();
179	<	}
180	<	}
453	>	task.cancel(true);
454	>	shouldThrow();
455	>	} catch (SecurityException expected) {}
456
457	+	// We failed to deliver the interrupt, but the world retains
458	+	// its sanity, as if we had done task.cancel(false)
459	+	assertTrue(task.isCancelled());
460	+	assertTrue(task.isDone());
461	+	assertEquals(1, task.runCount());
462	+	assertEquals(1, task.doneCount());
463	+	assertEquals(0, task.setCount());
464	+	assertEquals(0, task.setExceptionCount());
465	+	cancelled.countDown();
466	+	awaitTermination(t);
467	+	assertEquals(1, task.setCount());
468	+	assertEquals(0, task.setExceptionCount());
469	+	tryToConfuseDoneTask(task);
470	+	checkCancelled(task);
471	+	}
472
473		/**
474	<	* cancel(false) does not interrupt a running task
475	<	*/
476	<	public void testCancelNoInterrupt() {
477	<	FutureTask task = new FutureTask( new Callable() {
478	<	public Object call() {
474	>	* cancel(true) interrupts a running task that subsequently throws
475	>	*/
476	>	public void testCancelInterrupt_taskFails() {
477	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
478	>	final PublicFutureTask task =
479	>	new PublicFutureTask(new Runnable() {
480	>	public void run() {
481		try {
482	<	Thread.sleep(MEDIUM_DELAY_MS);
482	>	pleaseCancel.countDown();
483	>	delay(LONG_DELAY_MS);
484	>	shouldThrow();
485	>	} catch (Throwable t) {
486	>	assertTrue(t instanceof InterruptedException);
487		}
488	<	catch (InterruptedException success) {
489	<	threadFail("should not interrupt");
194	<	}
195	<	return Boolean.TRUE;
196	<	} });
197	<	Thread t = new  Thread(task);
198	<	t.start();
488	>	throw new RuntimeException();
489	>	}});
490
491	<	try {
492	<	Thread.sleep(SHORT_DELAY_MS);
493	<	assertTrue(task.cancel(false));
494	<	t.join();
495	<	assertTrue(task.isDone());
496	<	assertTrue(task.isCancelled());
497	<	} catch (InterruptedException e) {
498	<	unexpectedException();
499	<	}
491	>	Thread t = newStartedThread(task);
492	>	await(pleaseCancel);
493	>	assertTrue(task.cancel(true));
494	>	assertTrue(task.isCancelled());
495	>	awaitTermination(t);
496	>	assertEquals(1, task.runCount());
497	>	assertEquals(0, task.setCount());
498	>	assertEquals(1, task.setExceptionCount());
499	>	tryToConfuseDoneTask(task);
500	>	checkCancelled(task);
501		}
502
503		/**
504	<	* set in one thread causes get in another thread to retrieve value
504	>	* cancel(false) does not interrupt a running task
505		*/
506	<	public void testGet1() {
507	<	final FutureTask ft = new FutureTask(new Callable() {
508	<	public Object call() {
509	<	try {
510	<	Thread.sleep(MEDIUM_DELAY_MS);
511	<	} catch (InterruptedException e) {
512	<	threadUnexpectedException();
513	<	}
506	>	public void testCancelNoInterrupt() {
507	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
508	>	final CountDownLatch cancelled = new CountDownLatch(1);
509	>	final PublicFutureTask task =
510	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
511	>	public Boolean realCall() {
512	>	pleaseCancel.countDown();
513	>	await(cancelled);
514	>	assertFalse(Thread.interrupted());
515		return Boolean.TRUE;
516	<	}
224	<	});
225	<	Thread t = new Thread(new Runnable() {
226	<	public void run() {
227	<	try {
228	<	ft.get();
229	<	} catch (Exception e) {
230	<	threadUnexpectedException();
231	<	}
232	<	}
233	<	});
234	<	try {
235	<	assertFalse(ft.isDone());
236	<	assertFalse(ft.isCancelled());
237	<	t.start();
238	<	Thread.sleep(SHORT_DELAY_MS);
239	<	ft.run();
240	<	t.join();
241	<	assertTrue(ft.isDone());
242	<	assertFalse(ft.isCancelled());
243	<	} catch (InterruptedException e) {
244	<	unexpectedException();
516	>	}});
517
518	<	}
518	>	Thread t = newStartedThread(task);
519	>	await(pleaseCancel);
520	>	assertTrue(task.cancel(false));
521	>	assertTrue(task.isCancelled());
522	>	cancelled.countDown();
523	>	awaitTermination(t);
524	>	assertEquals(1, task.runCount());
525	>	assertEquals(1, task.setCount());
526	>	assertEquals(0, task.setExceptionCount());
527	>	tryToConfuseDoneTask(task);
528	>	checkCancelled(task);
529		}
530
531		/**
532	<	* set in one thread causes timed get in another thread to retrieve value
533	<	*/
534	<	public void testTimedGet1() {
535	<	final FutureTask ft = new FutureTask(new Callable() {
536	<	public Object call() {
537	<	try {
538	<	Thread.sleep(MEDIUM_DELAY_MS);
539	<	} catch (InterruptedException e) {
540	<	threadUnexpectedException();
541	<	}
542	<	return Boolean.TRUE;
543	<	}
544	<	});
545	<	Thread t = new Thread(new Runnable() {
546	<	public void run() {
547	<	try {
548	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
549	<	} catch (TimeoutException success) {
550	<	} catch (Exception e) {
551	<	threadUnexpectedException();
552	<	}
553	<	}
554	<	});
555	<	try {
556	<	assertFalse(ft.isDone());
557	<	assertFalse(ft.isCancelled());
558	<	t.start();
559	<	ft.run();
560	<	t.join();
561	<	assertTrue(ft.isDone());
562	<	assertFalse(ft.isCancelled());
563	<	} catch (InterruptedException e) {
564	<	unexpectedException();
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	<	}
570	>	/**
571	>	* set in one thread causes get in another thread to retrieve value
572	>	*/
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	<	*  Cancelling a task causes timed get in another thread to throw CancellationException
609	>	* Cancelling a task causes timed get in another thread to throw
610	>	* CancellationException
611		*/
612		public void testTimedGet_Cancellation() {
613	<	final FutureTask ft = new FutureTask(new Callable() {
614	<	public Object call() {
615	<	try {
616	<	Thread.sleep(SMALL_DELAY_MS);
617	<	threadShouldThrow();
618	<	} catch (InterruptedException e) {
619	<	}
620	<	return Boolean.TRUE;
621	<	}
622	<	});
623	<	try {
624	<	Thread t1 = new Thread(new Runnable() {
625	<	public void run() {
626	<	try {
627	<	ft.get(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
628	<	threadShouldThrow();
629	<	} catch (CancellationException success) {}
630	<	catch (Exception e) {
631	<	threadUnexpectedException();
632	<	}
633	<	}
634	<	});
635	<	Thread t2 = new Thread(ft);
636	<	t1.start();
637	<	t2.start();
638	<	Thread.sleep(SHORT_DELAY_MS);
639	<	ft.cancel(true);
640	<	t1.join();
641	<	t2.join();
642	<	} catch (InterruptedException ie) {
643	<	unexpectedException();
644	<	}
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 get in another thread to throw CancellationException
666	<	*/
667	<	public void testGet_Cancellation() {
668	<	final FutureTask ft = new FutureTask(new Callable() {
669	<	public Object call() {
670	<	try {
671	<	Thread.sleep(MEDIUM_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();
683	<	threadShouldThrow();
684	<	} catch (CancellationException success) {
346	<	}
347	<	catch (Exception e) {
348	<	threadUnexpectedException();
349	<	}
350	<	}
351	<	});
352	<	Thread t2 = new Thread(ft);
353	<	t1.start();
354	<	t2.start();
355	<	Thread.sleep(SHORT_DELAY_MS);
356	<	ft.cancel(true);
357	<	t1.join();
358	<	t2.join();
359	<	} catch (InterruptedException success) {
360	<	unexpectedException();
665	>	* A runtime exception in task causes get to throw ExecutionException
666	>	*/
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
364	–
688		/**
689	<	* A runtime exception in task causes get to throw ExecutionException
689	>	* A runtime exception in task causes timed get to throw ExecutionException
690		*/
691	<	public void testGet_ExecutionException() {
692	<	final FutureTask ft = new FutureTask(new Callable() {
693	<	public Object call() {
694	<	int i = 5/0;
695	<	return Boolean.TRUE;
696	<	}
697	<	});
698	<	try {
699	<	ft.run();
700	<	ft.get();
701	<	shouldThrow();
702	<	} catch (ExecutionException success) {
703	<	}
704	<	catch (Exception e) {
705	<	unexpectedException();
706	<	}
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		}
708
709		/**
710	<	*  A runtime exception in task causes timed get to throw ExecutionException
711	<	*/
712	<	public void testTimedGet_ExecutionException2() {
713	<	final FutureTask ft = new FutureTask(new Callable() {
714	<	public Object call() {
715	<	int i = 5/0;
716	<	return Boolean.TRUE;
717	<	}
718	<	});
719	<	try {
720	<	ft.run();
721	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
722	<	shouldThrow();
723	<	} catch (ExecutionException success) {
724	<	} catch (TimeoutException success) { } // unlikely but OK
725	<	catch (Exception e) {
726	<	unexpectedException();
727	<	}
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
407	–
738		/**
739	<	* Interrupting a waiting get causes it to throw InterruptedException
740	<	*/
741	<	public void testGet_InterruptedException() {
742	<	final FutureTask ft = new FutureTask(new NoOpCallable());
743	<	Thread t = new Thread(new Runnable() {
744	<	public void run() {
745	<	try {
746	<	ft.get();
747	<	threadShouldThrow();
748	<	} catch (InterruptedException success) {
749	<	} catch (Exception e) {
750	<	threadUnexpectedException();
751	<	}
752	<	}
753	<	});
754	<	try {
755	<	t.start();
756	<	Thread.sleep(SHORT_DELAY_MS);
757	<	t.interrupt();
758	<	t.join();
759	<	} catch (Exception e) {
760	<	unexpectedException();
761	<	}
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	<	*  Interrupting a waiting timed get causes it to throw InterruptedException
769	<	*/
770	<	public void testTimedGet_InterruptedException2() {
771	<	final FutureTask ft = new FutureTask(new NoOpCallable());
772	<	Thread t = new Thread(new Runnable() {
773	<	public void run() {
774	<	try {
775	<	ft.get(LONG_DELAY_MS,TimeUnit.MILLISECONDS);
776	<	threadShouldThrow();
777	<	} catch (InterruptedException success) {}
445	<	catch (Exception e) {
446	<	threadUnexpectedException();
447	<	}
448	<	}
449	<	});
450	<	try {
451	<	t.start();
452	<	Thread.sleep(SHORT_DELAY_MS);
453	<	t.interrupt();
454	<	t.join();
455	<	} catch (Exception e) {
456	<	unexpectedException();
768	>	* A timed out timed get throws TimeoutException
769	>	*/
770	>	public void testGet_TimeoutException() throws Exception {
771	>	FutureTask task = new FutureTask(new NoOpCallable());
772	>	long startTime = System.nanoTime();
773	>	try {
774	>	task.get(timeoutMillis(), MILLISECONDS);
775	>	shouldThrow();
776	>	} catch (TimeoutException success) {
777	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
778		}
779		}
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
805		}

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