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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 1.34 by jsr166, Sat Dec 29 19:07:32 2012 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	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
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	+	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	>	@Override public void done() {
176	>	assertTrue(isDone());
177	>	doneCount.incrementAndGet();
178	>	super.done();
179	>	}
180	>	@Override public boolean runAndReset() {
181	>	runAndResetCount.incrementAndGet();
182	>	return super.runAndReset();
183	>	}
184	>	@Override public void set(Object x) {
185	>	setCount.incrementAndGet();
186	>	super.set(x);
187	>	}
188	>	@Override 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.runCount());
323	>	assertEquals(0, task.setCount());
324	>	assertEquals(0, task.setExceptionCount());
325	>	assertTrue(task.isCancelled());
326	>	assertTrue(task.isDone());
327	>	tryToConfuseDoneTask(task);
328	>	assertEquals(0, task.runCount());
329	>	checkCancelled(task);
330		}
331
332		/**
333	<	*
333	>	* cancel(true) before run succeeds
334		*/
335		public void testCancelBeforeRun2() {
336	<	FutureTask task = new FutureTask( new NoOpCallable());
336	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
337		assertTrue(task.cancel(true));
338	<	task.run();
339	<	assertTrue(task.isDone());
340	<	assertTrue(task.isCancelled());
338	>	task.run();
339	>	assertEquals(0, task.runCount());
340	>	assertEquals(0, task.setCount());
341	>	assertEquals(0, task.setExceptionCount());
342	>	assertTrue(task.isCancelled());
343	>	assertTrue(task.isDone());
344	>	tryToConfuseDoneTask(task);
345	>	assertEquals(0, task.runCount());
346	>	checkCancelled(task);
347		}
348
349		/**
350	<	*
350	>	* cancel(false) of a completed task fails
351		*/
352		public void testCancelAfterRun() {
353	<	FutureTask task = new FutureTask( new NoOpCallable());
354	<	task.run();
353	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
354	>	task.run();
355		assertFalse(task.cancel(false));
356	<	assertTrue(task.isDone());
357	<	assertFalse(task.isCancelled());
356	>	assertEquals(1, task.runCount());
357	>	assertEquals(1, task.setCount());
358	>	assertEquals(0, task.setExceptionCount());
359	>	tryToConfuseDoneTask(task);
360	>	checkCompletedNormally(task, Boolean.TRUE);
361	>	assertEquals(1, task.runCount());
362	>	}
363	>
364	>	/**
365	>	* cancel(true) of a completed task fails
366	>	*/
367	>	public void testCancelAfterRun2() {
368	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
369	>	task.run();
370	>	assertFalse(task.cancel(true));
371	>	assertEquals(1, task.runCount());
372	>	assertEquals(1, task.setCount());
373	>	assertEquals(0, task.setExceptionCount());
374	>	tryToConfuseDoneTask(task);
375	>	checkCompletedNormally(task, Boolean.TRUE);
376	>	assertEquals(1, task.runCount());
377		}
378
379		/**
380	<	*
380	>	* cancel(true) interrupts a running task that subsequently succeeds
381		*/
382		public void testCancelInterrupt() {
383	<	FutureTask task = new FutureTask( new Callable() {
384	<	public Object call() {
383	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
384	>	final PublicFutureTask task =
385	>	new PublicFutureTask(new CheckedRunnable() {
386	>	public void realRun() {
387	>	pleaseCancel.countDown();
388		try {
389	<	Thread.sleep(MEDIUM_DELAY_MS);
390	<	threadShouldThrow();
391	<	}
392	<	catch (InterruptedException success) {}
393	<	return Boolean.TRUE;
394	<	} });
395	<	Thread t = new  Thread(task);
389	>	delay(LONG_DELAY_MS);
390	>	shouldThrow();
391	>	} catch (InterruptedException success) {}
392	>	}});
393	>
394	>	Thread t = newStartedThread(task);
395	>	await(pleaseCancel);
396	>	assertTrue(task.cancel(true));
397	>	assertTrue(task.isCancelled());
398	>	assertTrue(task.isDone());
399	>	awaitTermination(t);
400	>	assertEquals(1, task.runCount());
401	>	assertEquals(1, task.setCount());
402	>	assertEquals(0, task.setExceptionCount());
403	>	tryToConfuseDoneTask(task);
404	>	checkCancelled(task);
405	>	}
406	>
407	>	/**
408	>	* cancel(true) tries to interrupt a running task, but
409	>	* Thread.interrupt throws (simulating a restrictive security
410	>	* manager)
411	>	*/
412	>	public void testCancelInterrupt_ThrowsSecurityException() {
413	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
414	>	final CountDownLatch cancelled = new CountDownLatch(1);
415	>	final PublicFutureTask task =
416	>	new PublicFutureTask(new CheckedRunnable() {
417	>	public void realRun() {
418	>	pleaseCancel.countDown();
419	>	await(cancelled);
420	>	assertFalse(Thread.interrupted());
421	>	}});
422	>
423	>	final Thread t = new Thread(task) {
424	>	// Simulate a restrictive security manager.
425	>	@Override public void interrupt() {
426	>	throw new SecurityException();
427	>	}};
428	>	t.setDaemon(true);
429		t.start();
430	<
430	>
431	>	await(pleaseCancel);
432		try {
433	<	Thread.sleep(SHORT_DELAY_MS);
434	<	assertTrue(task.cancel(true));
435	<	t.join();
436	<	assertTrue(task.isDone());
437	<	assertTrue(task.isCancelled());
438	<	} catch(InterruptedException e){
439	<	unexpectedException();
440	<	}
433	>	task.cancel(true);
434	>	shouldThrow();
435	>	} catch (SecurityException expected) {}
436	>
437	>	// We failed to deliver the interrupt, but the world retains
438	>	// its sanity, as if we had done task.cancel(false)
439	>	assertTrue(task.isCancelled());
440	>	assertTrue(task.isDone());
441	>	assertEquals(1, task.runCount());
442	>	assertEquals(1, task.doneCount());
443	>	assertEquals(0, task.setCount());
444	>	assertEquals(0, task.setExceptionCount());
445	>	cancelled.countDown();
446	>	awaitTermination(t);
447	>	assertEquals(1, task.setCount());
448	>	assertEquals(0, task.setExceptionCount());
449	>	tryToConfuseDoneTask(task);
450	>	checkCancelled(task);
451		}
452
453	+	/**
454	+	* cancel(true) interrupts a running task that subsequently throws
455	+	*/
456	+	public void testCancelInterrupt_taskFails() {
457	+	final CountDownLatch pleaseCancel = new CountDownLatch(1);
458	+	final PublicFutureTask task =
459	+	new PublicFutureTask(new Runnable() {
460	+	public void run() {
461	+	try {
462	+	pleaseCancel.countDown();
463	+	delay(LONG_DELAY_MS);
464	+	} finally { throw new RuntimeException(); }
465	+	}});
466	+
467	+	Thread t = newStartedThread(task);
468	+	await(pleaseCancel);
469	+	assertTrue(task.cancel(true));
470	+	assertTrue(task.isCancelled());
471	+	awaitTermination(t);
472	+	assertEquals(1, task.runCount());
473	+	assertEquals(0, task.setCount());
474	+	assertEquals(1, task.setExceptionCount());
475	+	tryToConfuseDoneTask(task);
476	+	checkCancelled(task);
477	+	}
478
479		/**
480	<	*
480	>	* cancel(false) does not interrupt a running task
481		*/
482		public void testCancelNoInterrupt() {
483	<	FutureTask task = new FutureTask( new Callable() {
484	<	public Object call() {
485	<	try {
486	<	Thread.sleep(MEDIUM_DELAY_MS);
487	<	}
488	<	catch (InterruptedException success) {
489	<	threadFail("should not interrupt");
490	<	}
483	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
484	>	final CountDownLatch cancelled = new CountDownLatch(1);
485	>	final PublicFutureTask task =
486	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
487	>	public Boolean realCall() {
488	>	pleaseCancel.countDown();
489	>	await(cancelled);
490	>	assertFalse(Thread.interrupted());
491		return Boolean.TRUE;
492	<	} });
493	<	Thread t = new  Thread(task);
494	<	t.start();
495	<
492	>	}});
493	>
494	>	Thread t = newStartedThread(task);
495	>	await(pleaseCancel);
496	>	assertTrue(task.cancel(false));
497	>	assertTrue(task.isCancelled());
498	>	cancelled.countDown();
499	>	awaitTermination(t);
500	>	assertEquals(1, task.runCount());
501	>	assertEquals(1, task.setCount());
502	>	assertEquals(0, task.setExceptionCount());
503	>	tryToConfuseDoneTask(task);
504	>	checkCancelled(task);
505	>	}
506	>
507	>	/**
508	>	* run in one thread causes get in another thread to retrieve value
509	>	*/
510	>	public void testGetRun() {
511	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
512	>
513	>	final PublicFutureTask task =
514	>	new PublicFutureTask(new CheckedCallable<Object>() {
515	>	public Object realCall() {
516	>	return two;
517	>	}});
518	>
519	>	Thread t1 = newStartedThread(new CheckedRunnable() {
520	>	public void realRun() throws Exception {
521	>	pleaseRun.countDown();
522	>	assertSame(two, task.get());
523	>	}});
524	>
525	>	Thread t2 = newStartedThread(new CheckedRunnable() {
526	>	public void realRun() throws Exception {
527	>	pleaseRun.countDown();
528	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
529	>	}});
530	>
531	>	await(pleaseRun);
532	>	checkNotDone(task);
533	>	assertTrue(t1.isAlive());
534	>	assertTrue(t2.isAlive());
535	>	task.run();
536	>	checkCompletedNormally(task, two);
537	>	assertEquals(1, task.runCount());
538	>	assertEquals(1, task.setCount());
539	>	assertEquals(0, task.setExceptionCount());
540	>	awaitTermination(t1);
541	>	awaitTermination(t2);
542	>	tryToConfuseDoneTask(task);
543	>	checkCompletedNormally(task, two);
544	>	}
545	>
546	>	/**
547	>	* set in one thread causes get in another thread to retrieve value
548	>	*/
549	>	public void testGetSet() {
550	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
551	>
552	>	final PublicFutureTask task =
553	>	new PublicFutureTask(new CheckedCallable<Object>() {
554	>	public Object realCall() throws InterruptedException {
555	>	return two;
556	>	}});
557	>
558	>	Thread t1 = newStartedThread(new CheckedRunnable() {
559	>	public void realRun() throws Exception {
560	>	pleaseSet.countDown();
561	>	assertSame(two, task.get());
562	>	}});
563	>
564	>	Thread t2 = newStartedThread(new CheckedRunnable() {
565	>	public void realRun() throws Exception {
566	>	pleaseSet.countDown();
567	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
568	>	}});
569	>
570	>	await(pleaseSet);
571	>	checkNotDone(task);
572	>	assertTrue(t1.isAlive());
573	>	assertTrue(t2.isAlive());
574	>	task.set(two);
575	>	assertEquals(0, task.runCount());
576	>	assertEquals(1, task.setCount());
577	>	assertEquals(0, task.setExceptionCount());
578	>	tryToConfuseDoneTask(task);
579	>	checkCompletedNormally(task, two);
580	>	awaitTermination(t1);
581	>	awaitTermination(t2);
582	>	}
583	>
584	>	/**
585	>	* Cancelling a task causes timed get in another thread to throw
586	>	* CancellationException
587	>	*/
588	>	public void testTimedGet_Cancellation() {
589	>	for (final boolean mayInterruptIfRunning :
590	>	new boolean[] { true, false }) {
591	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
592	>	final CountDownLatch cancelled = new CountDownLatch(1);
593	>	final PublicFutureTask task =
594	>	new PublicFutureTask(new CheckedCallable<Object>() {
595	>	public Object realCall() throws InterruptedException {
596	>	pleaseCancel.countDown();
597	>	if (mayInterruptIfRunning) {
598	>	try {
599	>	delay(2*LONG_DELAY_MS);
600	>	} catch (InterruptedException success) {}
601	>	} else {
602	>	await(cancelled);
603	>	}
604	>	return two;
605	>	}});
606	>
607	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
608	>	public void realRun() throws Exception {
609	>	pleaseCancel.countDown();
610	>	task.get();
611	>	}};
612	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
613	>	public void realRun() throws Exception {
614	>	pleaseCancel.countDown();
615	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
616	>	}};
617	>	t1.start();
618	>	t2.start();
619	>	Thread t3 = newStartedThread(task);
620	>	await(pleaseCancel);
621	>	checkIsRunning(task);
622	>	task.cancel(mayInterruptIfRunning);
623	>	checkCancelled(task);
624	>	awaitTermination(t1);
625	>	awaitTermination(t2);
626	>	cancelled.countDown();
627	>	awaitTermination(t3);
628	>	assertEquals(1, task.runCount());
629	>	assertEquals(1, task.setCount());
630	>	assertEquals(0, task.setExceptionCount());
631	>	tryToConfuseDoneTask(task);
632	>	checkCancelled(task);
633	>	}
634	>	}
635	>
636	>	/**
637	>	* A runtime exception in task causes get to throw ExecutionException
638	>	*/
639	>	public void testGet_ExecutionException() throws InterruptedException {
640	>	final ArithmeticException e = new ArithmeticException();
641	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
642	>	public Object call() {
643	>	throw e;
644	>	}});
645	>
646	>	task.run();
647	>	assertEquals(1, task.runCount());
648	>	assertEquals(0, task.setCount());
649	>	assertEquals(1, task.setExceptionCount());
650		try {
651	<	Thread.sleep(SHORT_DELAY_MS);
652	<	assertTrue(task.cancel(false));
653	<	t.join();
654	<	assertTrue(task.isDone());
655	<	assertTrue(task.isCancelled());
656	<	} catch(InterruptedException e){
229	<	unexpectedException();
651	>	task.get();
652	>	shouldThrow();
653	>	} catch (ExecutionException success) {
654	>	assertSame(e, success.getCause());
655	>	tryToConfuseDoneTask(task);
656	>	checkCompletedAbnormally(task, success.getCause());
657		}
658		}
659
660		/**
661	<	*
661	>	* A runtime exception in task causes timed get to throw ExecutionException
662		*/
663	<	public void testGet1() {
664	<	final FutureTask ft = new FutureTask(new Callable() {
665	<	public Object call() {
666	<	try {
667	<	Thread.sleep(MEDIUM_DELAY_MS);
668	<	} catch(InterruptedException e){
669	<	threadUnexpectedException();
670	<	}
671	<	return Boolean.TRUE;
672	<	}
673	<	});
674	<	Thread t = new Thread(new Runnable() {
675	<	public void run() {
676	<	try {
677	<	ft.get();
678	<	} catch(Exception e){
679	<	threadUnexpectedException();
680	<	}
681	<	}
682	<	});
683	<	try {
684	<	assertFalse(ft.isDone());
685	<	assertFalse(ft.isCancelled());
686	<	t.start();
687	<	Thread.sleep(SHORT_DELAY_MS);
688	<	ft.run();
689	<	t.join();
690	<	assertTrue(ft.isDone());
691	<	assertFalse(ft.isCancelled());
692	<	} catch(InterruptedException e){
693	<	unexpectedException();
694	<
695	<	}
663	>	public void testTimedGet_ExecutionException2() throws Exception {
664	>	final ArithmeticException e = new ArithmeticException();
665	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
666	>	public Object call() {
667	>	throw e;
668	>	}});
669	>
670	>	task.run();
671	>	try {
672	>	task.get(LONG_DELAY_MS, MILLISECONDS);
673	>	shouldThrow();
674	>	} catch (ExecutionException success) {
675	>	assertSame(e, success.getCause());
676	>	tryToConfuseDoneTask(task);
677	>	checkCompletedAbnormally(task, success.getCause());
678	>	}
679	>	}
680	>
681	>	/**
682	>	* get is interruptible
683	>	*/
684	>	public void testGet_interruptible() {
685	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
686	>	final FutureTask task = new FutureTask(new NoOpCallable());
687	>	Thread t = newStartedThread(new CheckedRunnable() {
688	>	public void realRun() throws Exception {
689	>	Thread.currentThread().interrupt();
690	>	try {
691	>	task.get();
692	>	shouldThrow();
693	>	} catch (InterruptedException success) {}
694	>	assertFalse(Thread.interrupted());
695	>
696	>	pleaseInterrupt.countDown();
697	>	try {
698	>	task.get();
699	>	shouldThrow();
700	>	} catch (InterruptedException success) {}
701	>	assertFalse(Thread.interrupted());
702	>	}});
703	>
704	>	await(pleaseInterrupt);
705	>	t.interrupt();
706	>	awaitTermination(t);
707	>	checkNotDone(task);
708	>	}
709	>
710	>	/**
711	>	* timed get is interruptible
712	>	*/
713	>	public void testTimedGet_interruptible() {
714	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
715	>	final FutureTask task = new FutureTask(new NoOpCallable());
716	>	Thread t = newStartedThread(new CheckedRunnable() {
717	>	public void realRun() throws Exception {
718	>	Thread.currentThread().interrupt();
719	>	try {
720	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
721	>	shouldThrow();
722	>	} catch (InterruptedException success) {}
723	>	assertFalse(Thread.interrupted());
724	>
725	>	pleaseInterrupt.countDown();
726	>	try {
727	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
728	>	shouldThrow();
729	>	} catch (InterruptedException success) {}
730	>	assertFalse(Thread.interrupted());
731	>	}});
732	>
733	>	await(pleaseInterrupt);
734	>	t.interrupt();
735	>	awaitTermination(t);
736	>	checkNotDone(task);
737	>	}
738	>
739	>	/**
740	>	* A timed out timed get throws TimeoutException
741	>	*/
742	>	public void testGet_TimeoutException() throws Exception {
743	>	FutureTask task = new FutureTask(new NoOpCallable());
744	>	long startTime = System.nanoTime();
745	>	try {
746	>	task.get(timeoutMillis(), MILLISECONDS);
747	>	shouldThrow();
748	>	} catch (TimeoutException success) {
749	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
750	>	}
751		}
752
753		/**
754	<	*
755	<	*/
756	<	public void testTimedGet1() {
757	<	final FutureTask ft = new FutureTask(new Callable() {
758	<	public Object call() {
277	<	try {
278	<	Thread.sleep(MEDIUM_DELAY_MS);
279	<	} 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	<	}
754	>	* timed get with null TimeUnit throws NullPointerException
755	>	*/
756	>	public void testGet_NullTimeUnit() throws Exception {
757	>	FutureTask task = new FutureTask(new NoOpCallable());
758	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
759
760	+	for (long timeout : timeouts) {
761	+	try {
762	+	task.get(timeout, null);
763	+	shouldThrow();
764	+	} catch (NullPointerException success) {}
765	+	}
766
767	<	/**
768	<	*
769	<	*/
770	<	public void testGet_Cancellation() {
771	<	final FutureTask ft = new FutureTask(new Callable() {
772	<	public Object call() {
773	<	try {
774	<	Thread.sleep(MEDIUM_DELAY_MS);
318	<	} catch(InterruptedException e){
319	<	threadUnexpectedException();
320	<	}
321	<	return Boolean.TRUE;
322	<	}
323	<	});
324	<	try {
325	<	Thread.sleep(SHORT_DELAY_MS);
326	<	Thread t = new Thread(new Runnable() {
327	<	public void run() {
328	<	try {
329	<	ft.get();
330	<	threadShouldThrow();
331	<	} 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	<	}
767	>	task.run();
768	>
769	>	for (long timeout : timeouts) {
770	>	try {
771	>	task.get(timeout, null);
772	>	shouldThrow();
773	>	} catch (NullPointerException success) {}
774	>	}
775		}
776	<
776	>
777		}

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