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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.5 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.29 by jsr166, Mon Jun 20 04:31:59 2011 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.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	<	/**
32	<	* Subclass to expose protected methods
33	<	*/
34	<	static class MyFutureTask extends FutureTask {
35	<	public MyFutureTask(Callable r) { super(r); }
36	<	public boolean reset() { return super.reset(); }
37	<	public void setCancelled() { super.setCancelled(); }
38	<	public void setDone() { super.setDone(); }
39	<	public void set(Object x) { super.set(x); }
40	<	public void setException(Throwable t) { super.setException(t); }
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	>
41	>	// Check that run and runAndReset have no effect.
42	>	int savedRunCount = pf.runCount();
43	>	int savedSetCount = pf.setCount();
44	>	int savedSetExceptionCount = pf.setExceptionCount();
45	>	pf.run();
46	>	pf.runAndReset();
47	>	assertEquals(savedRunCount, pf.runCount());
48	>	assertEquals(savedSetCount, pf.setCount());
49	>	assertEquals(savedSetExceptionCount, pf.setExceptionCount());
50	>	assertTrue(f.isDone());
51	>	}
52		}
53
54	<	/**
55	<	*
56	<	*/
57	<	public void testConstructor() {
58	<	try {
59	<	FutureTask task = new FutureTask(null);
60	<	shouldThrow();
54	>	void checkNotDone(Future<?> f) {
55	>	assertFalse(f.isDone());
56	>	assertFalse(f.isCancelled());
57	>	if (f instanceof PublicFutureTask) {
58	>	PublicFutureTask pf = (PublicFutureTask) f;
59	>	assertEquals(0, pf.doneCount());
60	>	assertEquals(0, pf.setCount());
61	>	assertEquals(0, pf.setExceptionCount());
62		}
63	<	catch(NullPointerException success) {
63	>	}
64	>
65	>	void checkIsRunning(Future<?> f) {
66	>	checkNotDone(f);
67	>	if (f instanceof FutureTask) {
68	>	FutureTask ft = (FutureTask<?>) f;
69	>	// Check that run methods do nothing
70	>	ft.run();
71	>	if (f instanceof PublicFutureTask)
72	>	assertFalse(((PublicFutureTask) f).runAndReset());
73	>	checkNotDone(f);
74		}
75		}
76
77	<	/**
78	<	*
79	<	*/
80	<	public void testConstructor2() {
77	>	<T> void checkCompletedNormally(Future<T> f, T expected) {
78	>	checkIsDone(f);
79	>	assertFalse(f.isCancelled());
80	>
81	>	try {
82	>	assertSame(expected, f.get());
83	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
84	>	try {
85	>	assertSame(expected, f.get(5L, SECONDS));
86	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
87	>	}
88	>
89	>	void checkCancelled(Future<?> f) {
90	>	checkIsDone(f);
91	>	assertTrue(f.isCancelled());
92	>
93	>	try {
94	>	f.get();
95	>	shouldThrow();
96	>	} catch (CancellationException success) {
97	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
98	>
99		try {
100	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
100	>	f.get(5L, SECONDS);
101		shouldThrow();
102	+	} catch (CancellationException success) {
103	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
104	+	}
105	+
106	+	void tryToConfuseDoneTask(PublicFutureTask pf) {
107	+	pf.set(new Object());
108	+	pf.setException(new Error());
109	+	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
110	+	pf.cancel(true);
111		}
112	<	catch(NullPointerException success) {
112	>	}
113	>
114	>	void checkCompletedAbnormally(Future<?> f, Throwable t) {
115	>	checkIsDone(f);
116	>	assertFalse(f.isCancelled());
117	>
118	>	try {
119	>	f.get();
120	>	shouldThrow();
121	>	} catch (ExecutionException success) {
122	>	assertSame(t, success.getCause());
123	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
124	>
125	>	try {
126	>	f.get(5L, SECONDS);
127	>	shouldThrow();
128	>	} catch (ExecutionException success) {
129	>	assertSame(t, success.getCause());
130	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
131	>	}
132	>
133	>	/**
134	>	* Subclass to expose protected methods
135	>	*/
136	>	static class PublicFutureTask extends FutureTask {
137	>	private final AtomicInteger runCount;
138	>	private final AtomicInteger doneCount = new AtomicInteger(0);
139	>	private final AtomicInteger runAndResetCount = new AtomicInteger(0);
140	>	private final AtomicInteger setCount = new AtomicInteger(0);
141	>	private final AtomicInteger setExceptionCount = new AtomicInteger(0);
142	>	public int runCount() { return runCount.get(); }
143	>	public int doneCount() { return doneCount.get(); }
144	>	public int runAndResetCount() { return runAndResetCount.get(); }
145	>	public int setCount() { return setCount.get(); }
146	>	public int setExceptionCount() { return setExceptionCount.get(); }
147	>
148	>	PublicFutureTask(Runnable runnable) {
149	>	this(runnable, seven);
150	>	}
151	>	PublicFutureTask(Runnable runnable, Object result) {
152	>	this(runnable, result, new AtomicInteger(0));
153	>	}
154	>	private PublicFutureTask(final Runnable runnable, Object result,
155	>	final AtomicInteger runCount) {
156	>	super(new Runnable() {
157	>	public void run() {
158	>	runCount.getAndIncrement();
159	>	runnable.run();
160	>	}}, result);
161	>	this.runCount = runCount;
162	>	}
163	>	PublicFutureTask(Callable callable) {
164	>	this(callable, new AtomicInteger(0));
165	>	}
166	>	private PublicFutureTask(final Callable callable,
167	>	final AtomicInteger runCount) {
168	>	super(new Callable() {
169	>	public Object call() throws Exception {
170	>	runCount.getAndIncrement();
171	>	return callable.call();
172	>	}});
173	>	this.runCount = runCount;
174	>	}
175	>	public void done() {
176	>	assertTrue(isDone());
177	>	doneCount.incrementAndGet();
178	>	super.done();
179	>	}
180	>	public boolean runAndReset() {
181	>	runAndResetCount.incrementAndGet();
182	>	return super.runAndReset();
183	>	}
184	>	public void set(Object x) {
185	>	setCount.incrementAndGet();
186	>	super.set(x);
187	>	}
188	>	public void setException(Throwable t) {
189	>	setExceptionCount.incrementAndGet();
190	>	super.setException(t);
191	>	}
192	>	}
193	>
194	>	class Counter extends CheckedRunnable {
195	>	final AtomicInteger count = new AtomicInteger(0);
196	>	public int get() { return count.get(); }
197	>	public void realRun() {
198	>	count.getAndIncrement();
199		}
200		}
201
202		/**
203	<	*
203	>	* creating a future with a null callable throws NullPointerException
204		*/
205	<	public void testIsDone() {
206	<	FutureTask task = new FutureTask( new NoOpCallable());
207	<	task.run();
208	<	assertTrue(task.isDone());
209	<	assertFalse(task.isCancelled());
205	>	public void testConstructor() {
206	>	try {
207	>	new FutureTask(null);
208	>	shouldThrow();
209	>	} catch (NullPointerException success) {}
210		}
211
212		/**
213	<	*
213	>	* creating a future with null runnable throws NullPointerException
214		*/
215	<	public void testReset() {
216	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
217	<	task.run();
218	<	assertTrue(task.isDone());
219	<	assertTrue(task.reset());
215	>	public void testConstructor2() {
216	>	try {
217	>	new FutureTask(null, Boolean.TRUE);
218	>	shouldThrow();
219	>	} catch (NullPointerException success) {}
220		}
221
222		/**
223	<	*
223	>	* isDone is true when a task completes
224		*/
225	<	public void testResetAfterCancel() {
226	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
227	<	assertTrue(task.cancel(false));
228	<	task.run();
229	<	assertTrue(task.isDone());
230	<	assertTrue(task.isCancelled());
231	<	assertFalse(task.reset());
225	>	public void testIsDone() {
226	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
227	>	assertFalse(task.isDone());
228	>	task.run();
229	>	assertTrue(task.isDone());
230	>	checkCompletedNormally(task, Boolean.TRUE);
231	>	assertEquals(1, task.runCount());
232		}
233
234		/**
235	<	*
235	>	* runAndReset of a non-cancelled task succeeds
236		*/
237	<	public void testSetDone() {
238	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
239	<	task.setDone();
240	<	assertTrue(task.isDone());
241	<	assertFalse(task.isCancelled());
237	>	public void testRunAndReset() {
238	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
239	>	for (int i = 0; i < 3; i++) {
240	>	assertTrue(task.runAndReset());
241	>	checkNotDone(task);
242	>	assertEquals(i+1, task.runCount());
243	>	assertEquals(i+1, task.runAndResetCount());
244	>	assertEquals(0, task.setCount());
245	>	assertEquals(0, task.setExceptionCount());
246	>	}
247		}
248
249		/**
250	<	*
250	>	* runAndReset after cancellation fails
251		*/
252	<	public void testSetCancelled() {
253	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
254	<	assertTrue(task.cancel(false));
255	<	task.setCancelled();
256	<	assertTrue(task.isDone());
257	<	assertTrue(task.isCancelled());
252	>	public void testRunAndResetAfterCancel() {
253	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
254	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
255	>	assertTrue(task.cancel(mayInterruptIfRunning));
256	>	for (int i = 0; i < 3; i++) {
257	>	assertFalse(task.runAndReset());
258	>	assertEquals(0, task.runCount());
259	>	assertEquals(i+1, task.runAndResetCount());
260	>	assertEquals(0, task.setCount());
261	>	assertEquals(0, task.setExceptionCount());
262	>	}
263	>	tryToConfuseDoneTask(task);
264	>	checkCancelled(task);
265	>	}
266		}
267
268		/**
269	<	*
269	>	* setting value causes get to return it
270		*/
271	<	public void testSet() {
272	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
271	>	public void testSet() throws Exception {
272	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
273		task.set(one);
274	<	try {
275	<	assertEquals(task.get(), one);
276	<	}
277	<	catch(Exception e) {
120	<	unexpectedException();
274	>	for (int i = 0; i < 3; i++) {
275	>	assertSame(one, task.get());
276	>	assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS));
277	>	assertEquals(1, task.setCount());
278		}
279	+	tryToConfuseDoneTask(task);
280	+	checkCompletedNormally(task, one);
281	+	assertEquals(0, task.runCount());
282		}
283
284		/**
285	<	*
285	>	* setException causes get to throw ExecutionException
286		*/
287	<	public void testSetException() {
287	>	public void testSetException_get() throws Exception {
288		Exception nse = new NoSuchElementException();
289	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
289	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
290		task.setException(nse);
291	+
292		try {
293	<	Object x = task.get();
293	>	task.get();
294		shouldThrow();
295	+	} catch (ExecutionException success) {
296	+	assertSame(nse, success.getCause());
297	+	checkCompletedAbnormally(task, nse);
298		}
299	<	catch(ExecutionException ee) {
300	<	Throwable cause = ee.getCause();
301	<	assertEquals(cause, nse);
302	<	}
303	<	catch(Exception e) {
304	<	unexpectedException();
299	>
300	>	try {
301	>	task.get(LONG_DELAY_MS, MILLISECONDS);
302	>	shouldThrow();
303	>	} catch (ExecutionException success) {
304	>	assertSame(nse, success.getCause());
305	>	checkCompletedAbnormally(task, nse);
306		}
307	+
308	+	assertEquals(1, task.setExceptionCount());
309	+	assertEquals(0, task.setCount());
310	+	tryToConfuseDoneTask(task);
311	+	checkCompletedAbnormally(task, nse);
312	+	assertEquals(0, task.runCount());
313		}
314
315		/**
316	<	*
316	>	* cancel(false) before run succeeds
317		*/
318		public void testCancelBeforeRun() {
319	<	FutureTask task = new FutureTask( new NoOpCallable());
319	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
320		assertTrue(task.cancel(false));
321	<	task.run();
322	<	assertTrue(task.isDone());
323	<	assertTrue(task.isCancelled());
321	>	task.run();
322	>	assertEquals(0, task.setCount());
323	>	assertEquals(0, task.setExceptionCount());
324	>	tryToConfuseDoneTask(task);
325	>	checkCancelled(task);
326	>	assertEquals(0, task.runCount());
327		}
328
329		/**
330	<	*
330	>	* cancel(true) before run succeeds
331		*/
332		public void testCancelBeforeRun2() {
333	<	FutureTask task = new FutureTask( new NoOpCallable());
333	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
334		assertTrue(task.cancel(true));
335	<	task.run();
336	<	assertTrue(task.isDone());
337	<	assertTrue(task.isCancelled());
335	>	task.run();
336	>	assertEquals(0, task.setCount());
337	>	assertEquals(0, task.setExceptionCount());
338	>	tryToConfuseDoneTask(task);
339	>	checkCancelled(task);
340	>	assertEquals(0, task.runCount());
341		}
342
343		/**
344	<	*
344	>	* cancel(false) of a completed task fails
345		*/
346		public void testCancelAfterRun() {
347	<	FutureTask task = new FutureTask( new NoOpCallable());
348	<	task.run();
347	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
348	>	task.run();
349		assertFalse(task.cancel(false));
350	<	assertTrue(task.isDone());
351	<	assertFalse(task.isCancelled());
350	>	assertEquals(1, task.setCount());
351	>	assertEquals(0, task.setExceptionCount());
352	>	tryToConfuseDoneTask(task);
353	>	checkCompletedNormally(task, Boolean.TRUE);
354	>	assertEquals(1, task.runCount());
355	>	}
356	>
357	>	/**
358	>	* cancel(true) of a completed task fails
359	>	*/
360	>	public void testCancelAfterRun2() {
361	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
362	>	task.run();
363	>	assertFalse(task.cancel(true));
364	>	assertEquals(1, task.setCount());
365	>	assertEquals(0, task.setExceptionCount());
366	>	tryToConfuseDoneTask(task);
367	>	checkCompletedNormally(task, Boolean.TRUE);
368	>	assertEquals(1, task.runCount());
369		}
370
371		/**
372	<	*
372	>	* cancel(true) interrupts a running task that subsequently succeeds
373		*/
374		public void testCancelInterrupt() {
375	<	FutureTask task = new FutureTask( new Callable() {
376	<	public Object call() {
375	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
376	>	final PublicFutureTask task =
377	>	new PublicFutureTask(new CheckedRunnable() {
378	>	public void realRun() {
379	>	pleaseCancel.countDown();
380		try {
381	<	Thread.sleep(MEDIUM_DELAY_MS);
382	<	threadShouldThrow();
383	<	}
384	<	catch (InterruptedException success) {}
385	<	return Boolean.TRUE;
386	<	} });
387	<	Thread t = new  Thread(task);
388	<	t.start();
389	<
390	<	try {
391	<	Thread.sleep(SHORT_DELAY_MS);
392	<	assertTrue(task.cancel(true));
393	<	t.join();
394	<	assertTrue(task.isDone());
395	<	assertTrue(task.isCancelled());
199	<	} catch(InterruptedException e){
200	<	unexpectedException();
201	<	}
381	>	delay(LONG_DELAY_MS);
382	>	shouldThrow();
383	>	} catch (InterruptedException success) {}
384	>	}});
385	>
386	>	Thread t = newStartedThread(task);
387	>	await(pleaseCancel);
388	>	assertTrue(task.cancel(true));
389	>	assertTrue(task.isCancelled());
390	>	awaitTermination(t);
391	>	assertEquals(1, task.runCount());
392	>	assertEquals(1, task.setCount());
393	>	assertEquals(0, task.setExceptionCount());
394	>	tryToConfuseDoneTask(task);
395	>	checkCancelled(task);
396		}
397
398	+	/**
399	+	* cancel(true) interrupts a running task that subsequently throws
400	+	*/
401	+	public void testCancelInterrupt_taskFails() {
402	+	final CountDownLatch pleaseCancel = new CountDownLatch(1);
403	+	final PublicFutureTask task =
404	+	new PublicFutureTask(new Runnable() {
405	+	public void run() {
406	+	try {
407	+	pleaseCancel.countDown();
408	+	delay(LONG_DELAY_MS);
409	+	} finally { throw new RuntimeException(); }
410	+	}});
411	+
412	+	Thread t = newStartedThread(task);
413	+	await(pleaseCancel);
414	+	assertTrue(task.cancel(true));
415	+	assertTrue(task.isCancelled());
416	+	awaitTermination(t);
417	+	assertEquals(1, task.runCount());
418	+	assertEquals(0, task.setCount());
419	+	assertEquals(1, task.setExceptionCount());
420	+	tryToConfuseDoneTask(task);
421	+	checkCancelled(task);
422	+	}
423
424		/**
425	<	*
425	>	* cancel(false) does not interrupt a running task
426		*/
427		public void testCancelNoInterrupt() {
428	<	FutureTask task = new FutureTask( new Callable() {
429	<	public Object call() {
430	<	try {
431	<	Thread.sleep(MEDIUM_DELAY_MS);
432	<	}
433	<	catch (InterruptedException success) {
434	<	threadFail("should not interrupt");
435	<	}
428	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
429	>	final CountDownLatch cancelled = new CountDownLatch(1);
430	>	final PublicFutureTask task =
431	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
432	>	public Boolean realCall() {
433	>	pleaseCancel.countDown();
434	>	await(cancelled);
435	>	assertFalse(Thread.interrupted());
436		return Boolean.TRUE;
437	<	} });
438	<	Thread t = new  Thread(task);
439	<	t.start();
440	<
441	<	try {
442	<	Thread.sleep(SHORT_DELAY_MS);
443	<	assertTrue(task.cancel(false));
444	<	t.join();
445	<	assertTrue(task.isDone());
446	<	assertTrue(task.isCancelled());
447	<	} catch(InterruptedException e){
448	<	unexpectedException();
437	>	}});
438	>
439	>	Thread t = newStartedThread(task);
440	>	await(pleaseCancel);
441	>	assertTrue(task.cancel(false));
442	>	assertTrue(task.isCancelled());
443	>	cancelled.countDown();
444	>	awaitTermination(t);
445	>	assertEquals(1, task.runCount());
446	>	assertEquals(1, task.setCount());
447	>	assertEquals(0, task.setExceptionCount());
448	>	tryToConfuseDoneTask(task);
449	>	checkCancelled(task);
450	>	}
451	>
452	>	/**
453	>	* run in one thread causes get in another thread to retrieve value
454	>	*/
455	>	public void testGetRun() {
456	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
457	>
458	>	final PublicFutureTask task =
459	>	new PublicFutureTask(new CheckedCallable<Object>() {
460	>	public Object realCall() {
461	>	return two;
462	>	}});
463	>
464	>	Thread t1 = newStartedThread(new CheckedRunnable() {
465	>	public void realRun() throws Exception {
466	>	pleaseRun.countDown();
467	>	assertSame(two, task.get());
468	>	}});
469	>
470	>	Thread t2 = newStartedThread(new CheckedRunnable() {
471	>	public void realRun() throws Exception {
472	>	pleaseRun.countDown();
473	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
474	>	}});
475	>
476	>	await(pleaseRun);
477	>	checkNotDone(task);
478	>	assertTrue(t1.isAlive());
479	>	assertTrue(t2.isAlive());
480	>	task.run();
481	>	checkCompletedNormally(task, two);
482	>	assertEquals(1, task.runCount());
483	>	assertEquals(1, task.setCount());
484	>	assertEquals(0, task.setExceptionCount());
485	>	awaitTermination(t1);
486	>	awaitTermination(t2);
487	>	tryToConfuseDoneTask(task);
488	>	checkCompletedNormally(task, two);
489	>	}
490	>
491	>	/**
492	>	* set in one thread causes get in another thread to retrieve value
493	>	*/
494	>	public void testGetSet() {
495	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
496	>
497	>	final PublicFutureTask task =
498	>	new PublicFutureTask(new CheckedCallable<Object>() {
499	>	public Object realCall() throws InterruptedException {
500	>	return two;
501	>	}});
502	>
503	>	Thread t1 = newStartedThread(new CheckedRunnable() {
504	>	public void realRun() throws Exception {
505	>	pleaseSet.countDown();
506	>	assertSame(two, task.get());
507	>	}});
508	>
509	>	Thread t2 = newStartedThread(new CheckedRunnable() {
510	>	public void realRun() throws Exception {
511	>	pleaseSet.countDown();
512	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
513	>	}});
514	>
515	>	await(pleaseSet);
516	>	checkNotDone(task);
517	>	assertTrue(t1.isAlive());
518	>	assertTrue(t2.isAlive());
519	>	task.set(two);
520	>	assertEquals(0, task.runCount());
521	>	assertEquals(1, task.setCount());
522	>	assertEquals(0, task.setExceptionCount());
523	>	tryToConfuseDoneTask(task);
524	>	checkCompletedNormally(task, two);
525	>	awaitTermination(t1);
526	>	awaitTermination(t2);
527	>	}
528	>
529	>	/**
530	>	* Cancelling a task causes timed get in another thread to throw
531	>	* CancellationException
532	>	*/
533	>	public void testTimedGet_Cancellation() {
534	>	for (final boolean mayInterruptIfRunning :
535	>	new boolean[] { true, false }) {
536	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
537	>	final CountDownLatch cancelled = new CountDownLatch(1);
538	>	final PublicFutureTask task =
539	>	new PublicFutureTask(new CheckedCallable<Object>() {
540	>	public Object realCall() throws InterruptedException {
541	>	pleaseCancel.countDown();
542	>	if (mayInterruptIfRunning) {
543	>	try {
544	>	delay(2*LONG_DELAY_MS);
545	>	} catch (InterruptedException success) {}
546	>	} else {
547	>	await(cancelled);
548	>	}
549	>	return two;
550	>	}});
551	>
552	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
553	>	public void realRun() throws Exception {
554	>	pleaseCancel.countDown();
555	>	task.get();
556	>	}};
557	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
558	>	public void realRun() throws Exception {
559	>	pleaseCancel.countDown();
560	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
561	>	}};
562	>	t1.start();
563	>	t2.start();
564	>	Thread t3 = newStartedThread(task);
565	>	await(pleaseCancel);
566	>	checkIsRunning(task);
567	>	task.cancel(mayInterruptIfRunning);
568	>	checkCancelled(task);
569	>	awaitTermination(t1);
570	>	awaitTermination(t2);
571	>	cancelled.countDown();
572	>	awaitTermination(t3);
573	>	assertEquals(1, task.runCount());
574	>	assertEquals(1, task.setCount());
575	>	assertEquals(0, task.setExceptionCount());
576	>	tryToConfuseDoneTask(task);
577	>	checkCancelled(task);
578		}
579		}
580
581		/**
582	<	*
583	<	*/
584	<	public void testGet1() {
585	<	final FutureTask ft = new FutureTask(new Callable() {
586	<	public Object call() {
587	<	try {
588	<	Thread.sleep(MEDIUM_DELAY_MS);
589	<	} catch(InterruptedException e){
590	<	threadUnexpectedException();
591	<	}
592	<	return Boolean.TRUE;
593	<	}
594	<	});
595	<	Thread t = new Thread(new Runnable() {
596	<	public void run() {
597	<	try {
598	<	ft.get();
599	<	} catch(Exception e){
600	<	threadUnexpectedException();
601	<	}
602	<	}
255	<	});
256	<	try {
257	<	assertFalse(ft.isDone());
258	<	assertFalse(ft.isCancelled());
259	<	t.start();
260	<	Thread.sleep(SHORT_DELAY_MS);
261	<	ft.run();
262	<	t.join();
263	<	assertTrue(ft.isDone());
264	<	assertFalse(ft.isCancelled());
265	<	} catch(InterruptedException e){
266	<	unexpectedException();
267	<
268	<	}
582	>	* A runtime exception in task causes get to throw ExecutionException
583	>	*/
584	>	public void testGet_ExecutionException() throws InterruptedException {
585	>	final ArithmeticException e = new ArithmeticException();
586	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
587	>	public Object call() {
588	>	throw e;
589	>	}});
590	>
591	>	task.run();
592	>	assertEquals(1, task.runCount());
593	>	assertEquals(0, task.setCount());
594	>	assertEquals(1, task.setExceptionCount());
595	>	try {
596	>	task.get();
597	>	shouldThrow();
598	>	} catch (ExecutionException success) {
599	>	assertSame(e, success.getCause());
600	>	tryToConfuseDoneTask(task);
601	>	checkCompletedAbnormally(task, success.getCause());
602	>	}
603		}
604
605		/**
606	<	*
607	<	*/
608	<	public void testTimedGet1() {
609	<	final FutureTask ft = new FutureTask(new Callable() {
610	<	public Object call() {
611	<	try {
612	<	Thread.sleep(MEDIUM_DELAY_MS);
613	<	} catch(InterruptedException e){
280	<	threadUnexpectedException();
281	<	}
282	<	return Boolean.TRUE;
283	<	}
284	<	});
285	<	Thread t = new Thread(new Runnable() {
286	<	public void run() {
287	<	try {
288	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
289	<	} catch(TimeoutException success) {
290	<	} catch(Exception e){
291	<	threadUnexpectedException();
292	<	}
293	<	}
294	<	});
295	<	try {
296	<	assertFalse(ft.isDone());
297	<	assertFalse(ft.isCancelled());
298	<	t.start();
299	<	ft.run();
300	<	t.join();
301	<	assertTrue(ft.isDone());
302	<	assertFalse(ft.isCancelled());
303	<	} catch(InterruptedException e){
304	<	unexpectedException();
305	<
306	<	}
307	<	}
606	>	* A runtime exception in task causes timed get to throw ExecutionException
607	>	*/
608	>	public void testTimedGet_ExecutionException2() throws Exception {
609	>	final ArithmeticException e = new ArithmeticException();
610	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
611	>	public Object call() {
612	>	throw e;
613	>	}});
614
615	+	task.run();
616	+	try {
617	+	task.get(LONG_DELAY_MS, MILLISECONDS);
618	+	shouldThrow();
619	+	} catch (ExecutionException success) {
620	+	assertSame(e, success.getCause());
621	+	tryToConfuseDoneTask(task);
622	+	checkCompletedAbnormally(task, success.getCause());
623	+	}
624	+	}
625	+
626	+	/**
627	+	* get is interruptible
628	+	*/
629	+	public void testGet_interruptible() {
630	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
631	+	final FutureTask task = new FutureTask(new NoOpCallable());
632	+	Thread t = newStartedThread(new CheckedRunnable() {
633	+	public void realRun() throws Exception {
634	+	Thread.currentThread().interrupt();
635	+	try {
636	+	task.get();
637	+	shouldThrow();
638	+	} catch (InterruptedException success) {}
639	+	assertFalse(Thread.interrupted());
640	+
641	+	pleaseInterrupt.countDown();
642	+	try {
643	+	task.get();
644	+	shouldThrow();
645	+	} catch (InterruptedException success) {}
646	+	assertFalse(Thread.interrupted());
647	+	}});
648	+
649	+	await(pleaseInterrupt);
650	+	t.interrupt();
651	+	awaitTermination(t);
652	+	checkNotDone(task);
653	+	}
654	+
655	+	/**
656	+	* timed get is interruptible
657	+	*/
658	+	public void testTimedGet_interruptible() {
659	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
660	+	final FutureTask task = new FutureTask(new NoOpCallable());
661	+	Thread t = newStartedThread(new CheckedRunnable() {
662	+	public void realRun() throws Exception {
663	+	Thread.currentThread().interrupt();
664	+	try {
665	+	task.get(2*LONG_DELAY_MS, MILLISECONDS);
666	+	shouldThrow();
667	+	} catch (InterruptedException success) {}
668	+	assertFalse(Thread.interrupted());
669	+
670	+	pleaseInterrupt.countDown();
671	+	try {
672	+	task.get(2*LONG_DELAY_MS, MILLISECONDS);
673	+	shouldThrow();
674	+	} catch (InterruptedException success) {}
675	+	assertFalse(Thread.interrupted());
676	+	}});
677	+
678	+	await(pleaseInterrupt);
679	+	t.interrupt();
680	+	awaitTermination(t);
681	+	checkNotDone(task);
682	+	}
683	+
684	+	/**
685	+	* A timed out timed get throws TimeoutException
686	+	*/
687	+	public void testGet_TimeoutException() throws Exception {
688	+	FutureTask task = new FutureTask(new NoOpCallable());
689	+	long startTime = System.nanoTime();
690	+	try {
691	+	task.get(timeoutMillis(), MILLISECONDS);
692	+	shouldThrow();
693	+	} catch (TimeoutException success) {
694	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
695	+	}
696	+	}
697
698		/**
699	<	*
700	<	*/
701	<	public void testGet_Cancellation() {
702	<	final FutureTask ft = new FutureTask(new Callable() {
703	<	public Object call() {
704	<	try {
705	<	Thread.sleep(MEDIUM_DELAY_MS);
706	<	} catch(InterruptedException e){
707	<	threadUnexpectedException();
708	<	}
709	<	return Boolean.TRUE;
710	<	}
711	<	});
712	<	try {
713	<	Thread.sleep(SHORT_DELAY_MS);
714	<	Thread t = new Thread(new Runnable() {
715	<	public void run() {
716	<	try {
717	<	ft.get();
718	<	threadShouldThrow();
719	<	} catch(CancellationException success){
332	<	}
333	<	catch(Exception e){
334	<	threadUnexpectedException();
335	<	}
336	<	}
337	<	});
338	<	t.start();
339	<	ft.cancel(true);
340	<	t.join();
341	<	} catch(InterruptedException success){
342	<	unexpectedException();
343	<	}
344	<	}
345	<
346	<	/**
347	<	*
348	<	*/
349	<	public void testGet_Cancellation2() {
350	<	final FutureTask ft = new FutureTask(new Callable() {
351	<	public Object call() {
352	<	try {
353	<	Thread.sleep(SHORT_DELAY_MS);
354	<	} catch(InterruptedException e) {
355	<	threadUnexpectedException();
356	<	}
357	<	return Boolean.TRUE;
358	<	}
359	<	});
360	<	try {
361	<	Thread.sleep(SHORT_DELAY_MS);
362	<	Thread t = new Thread(new Runnable() {
363	<	public void run() {
364	<	try {
365	<	ft.get(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
366	<	threadShouldThrow();
367	<	} catch(CancellationException success) {}
368	<	catch(Exception e){
369	<	threadUnexpectedException();
370	<	}
371	<	}
372	<	});
373	<	t.start();
374	<	Thread.sleep(SHORT_DELAY_MS);
375	<	ft.cancel(true);
376	<	Thread.sleep(SHORT_DELAY_MS);
377	<	t.join();
378	<	} catch(InterruptedException ie){
379	<	unexpectedException();
380	<	}
381	<	}
382	<
383	<	/**
384	<	*
385	<	*/
386	<	public void testGet_ExecutionException() {
387	<	final FutureTask ft = new FutureTask(new Callable() {
388	<	public Object call() {
389	<	int i = 5/0;
390	<	return Boolean.TRUE;
391	<	}
392	<	});
393	<	try {
394	<	ft.run();
395	<	ft.get();
396	<	shouldThrow();
397	<	} catch(ExecutionException success){
398	<	}
399	<	catch(Exception e){
400	<	unexpectedException();
401	<	}
402	<	}
403	<
404	<	/**
405	<	*
406	<	*/
407	<	public void testTimedGet_ExecutionException2() {
408	<	final FutureTask ft = new FutureTask(new Callable() {
409	<	public Object call() {
410	<	int i = 5/0;
411	<	return Boolean.TRUE;
412	<	}
413	<	});
414	<	try {
415	<	ft.run();
416	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
417	<	shouldThrow();
418	<	} catch(ExecutionException success) {
419	<	} catch(TimeoutException success) { } // unlikely but OK
420	<	catch(Exception e){
421	<	unexpectedException();
422	<	}
423	<	}
424	<
425	<
426	<	/**
427	<	*
428	<	*/
429	<	public void testGet_InterruptedException() {
430	<	final FutureTask ft = new FutureTask(new NoOpCallable());
431	<	Thread t = new Thread(new Runnable() {
432	<	public void run() {
433	<	try {
434	<	ft.get();
435	<	threadShouldThrow();
436	<	} catch(InterruptedException success){
437	<	} catch(Exception e){
438	<	threadUnexpectedException();
439	<	}
440	<	}
441	<	});
442	<	try {
443	<	t.start();
444	<	Thread.sleep(SHORT_DELAY_MS);
445	<	t.interrupt();
446	<	t.join();
447	<	} catch(Exception e){
448	<	unexpectedException();
449	<	}
450	<	}
451	<
452	<	/**
453	<	*
454	<	*/
455	<	public void testTimedGet_InterruptedException2() {
456	<	final FutureTask ft = new FutureTask(new NoOpCallable());
457	<	Thread t = new Thread(new Runnable() {
458	<	public void run() {
459	<	try {
460	<	ft.get(LONG_DELAY_MS,TimeUnit.MILLISECONDS);
461	<	threadShouldThrow();
462	<	} catch(InterruptedException success){}
463	<	catch(Exception e){
464	<	threadUnexpectedException();
465	<	}
466	<	}
467	<	});
468	<	try {
469	<	t.start();
470	<	Thread.sleep(SHORT_DELAY_MS);
471	<	t.interrupt();
472	<	t.join();
473	<	} catch(Exception e){
474	<	unexpectedException();
475	<	}
476	<	}
477	<
478	<	/**
479	<	*
480	<	*/
481	<	public void testGet_TimeoutException() {
482	<	try {
483	<	FutureTask ft = new FutureTask(new NoOpCallable());
484	<	ft.get(1,TimeUnit.MILLISECONDS);
485	<	shouldThrow();
486	<	} catch(TimeoutException success){}
487	<	catch(Exception success){
488	<	unexpectedException();
489	<	}
699	>	* timed get with null TimeUnit throws NullPointerException
700	>	*/
701	>	public void testGet_NullTimeUnit() throws Exception {
702	>	FutureTask task = new FutureTask(new NoOpCallable());
703	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
704	>
705	>	for (long timeout : timeouts) {
706	>	try {
707	>	task.get(timeout, null);
708	>	shouldThrow();
709	>	} catch (NullPointerException success) {}
710	>	}
711	>
712	>	task.run();
713	>
714	>	for (long timeout : timeouts) {
715	>	try {
716	>	task.get(timeout, null);
717	>	shouldThrow();
718	>	} catch (NullPointerException success) {}
719	>	}
720		}
721	<
721	>
722		}

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