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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.4 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.30 by jsr166, Sat Dec 15 21:48:32 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	<	public void testConstructor(){
55	<	try {
56	<	FutureTask task = new FutureTask(null);
57	<	fail("should throw");
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	<	public void testConstructor2(){
77	>	<T> void checkCompletedNormally(Future<T> f, T expected) {
78	>	checkIsDone(f);
79	>	assertFalse(f.isCancelled());
80	>
81		try {
82	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
83	<	fail("should throw");
84	<	}
85	<	catch(NullPointerException success) {
86	<	}
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	<	public void testIsDone(){
90	<	FutureTask task = new FutureTask( new NoOpCallable());
91	<	task.run();
92	<	assertTrue(task.isDone());
93	<	assertFalse(task.isCancelled());
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	<	public void testReset(){
107	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
108	<	task.run();
109	<	assertTrue(task.isDone());
110	<	assertTrue(task.reset());
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		}
113
114	<	public void testResetAfterCancel() {
115	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
116	<	assertTrue(task.cancel(false));
117	<	task.run();
118	<	assertTrue(task.isDone());
119	<	assertTrue(task.isCancelled());
120	<	assertFalse(task.reset());
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	<	public void testSetDone() {
134	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
135	<	task.setDone();
136	<	assertTrue(task.isDone());
137	<	assertFalse(task.isCancelled());
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	<	public void testSetCancelled() {
195	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
196	<	assertTrue(task.cancel(false));
197	<	task.setCancelled();
198	<	assertTrue(task.isDone());
199	<	assertTrue(task.isCancelled());
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	<	public void testSet() {
203	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
204	<	task.set(one);
202	>	/**
203	>	* creating a future with a null callable throws NullPointerException
204	>	*/
205	>	public void testConstructor() {
206		try {
207	<	assertEquals(task.get(), one);
207	>	new FutureTask(null);
208	>	shouldThrow();
209	>	} catch (NullPointerException success) {}
210	>	}
211	>
212	>	/**
213	>	* creating a future with null runnable throws NullPointerException
214	>	*/
215	>	public void testConstructor2() {
216	>	try {
217	>	new FutureTask(null, Boolean.TRUE);
218	>	shouldThrow();
219	>	} catch (NullPointerException success) {}
220	>	}
221	>
222	>	/**
223	>	* isDone is true when a task completes
224	>	*/
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	>	* runAndReset of a non-cancelled task succeeds
236	>	*/
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	<	catch(Exception e) {
248	<	fail("unexpected exception");
247	>	}
248	>
249	>	/**
250	>	* runAndReset after cancellation fails
251	>	*/
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	<	public void testSetException() {
268	>	/**
269	>	* setting value causes get to return it
270	>	*/
271	>	public void testSet() throws Exception {
272	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
273	>	task.set(one);
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	>	* setException causes get to throw ExecutionException
286	>	*/
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();
294	<	fail("should throw");
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	<	fail("unexpected exception");
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	+	* 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	+	* 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	+	* 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	<	public void testCancelInterrupt(){
358	<	FutureTask task = new FutureTask( new Callable() {
359	<	public Object call() {
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	>	* cancel(true) interrupts a running task that subsequently succeeds
373	>	*/
374	>	public void testCancelInterrupt() {
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	<	threadFail("should throw");
383	<	}
384	<	catch (InterruptedException success) {}
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	>	* cancel(false) does not interrupt a running task
426	>	*/
427	>	public void testCancelNoInterrupt() {
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(true));
444	<	t.join();
445	<	assertTrue(task.isDone());
446	<	assertTrue(task.isCancelled());
447	<	} catch(InterruptedException e){
448	<	fail("unexpected exception");
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	+	* 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	<	public void testCancelNoInterrupt(){
606	<	FutureTask task = new FutureTask( new Callable() {
607	<	public Object call() {
608	<	try {
609	<	Thread.sleep(MEDIUM_DELAY_MS);
610	<	}
611	<	catch (InterruptedException success) {
612	<	threadFail("should not interrupt");
613	<	}
614	<	return Boolean.TRUE;
615	<	} });
616	<	Thread t = new  Thread(task);
617	<	t.start();
618	<
619	<	try{
620	<	Thread.sleep(SHORT_DELAY_MS);
621	<	assertTrue(task.cancel(false));
622	<	t.join();
184	<	assertTrue(task.isDone());
185	<	assertTrue(task.isCancelled());
186	<	} catch(InterruptedException e){
187	<	fail("unexpected exception");
605	>	/**
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	<	public void testGet1() {
627	<	final FutureTask ft = new FutureTask(new Callable(){
628	<	public Object call(){
629	<	try{
630	<	Thread.sleep(MEDIUM_DELAY_MS);
631	<	} catch(InterruptedException e){
632	<	threadFail("unexpected exception");
633	<	}
634	<	return Boolean.TRUE;
635	<	}
636	<	});
637	<	Thread t = new Thread(new Runnable(){
638	<	public void run(){
639	<	try{
640	<	ft.get();
641	<	} catch(Exception e){
642	<	threadFail("unexpected exception");
643	<	}
644	<	}
645	<	});
646	<	try{
647	<	assertFalse(ft.isDone());
648	<	assertFalse(ft.isCancelled());
649	<	t.start();
650	<	Thread.sleep(SHORT_DELAY_MS);
651	<	ft.run();
652	<	t.join();
218	<	assertTrue(ft.isDone());
219	<	assertFalse(ft.isCancelled());
220	<	} catch(InterruptedException e){
221	<	fail("unexpected exception");
222	<
223	<	}
224	<	}
225	<
226	<	public void testTimedGet1() {
227	<	final FutureTask ft = new FutureTask(new Callable(){
228	<	public Object call(){
229	<	try{
230	<	Thread.sleep(MEDIUM_DELAY_MS);
231	<	} catch(InterruptedException e){
232	<	threadFail("unexpected exception");
233	<	}
234	<	return Boolean.TRUE;
235	<	}
236	<	});
237	<	Thread t = new Thread(new Runnable(){
238	<	public void run(){
239	<	try{
240	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
241	<	} catch(TimeoutException success) {
242	<	} catch(Exception e){
243	<	threadFail("unexpected exception");
244	<	}
245	<	}
246	<	});
247	<	try{
248	<	assertFalse(ft.isDone());
249	<	assertFalse(ft.isCancelled());
250	<	t.start();
251	<	ft.run();
252	<	t.join();
253	<	assertTrue(ft.isDone());
254	<	assertFalse(ft.isCancelled());
255	<	} catch(InterruptedException e){
256	<	fail("unexpected exception");
257	<
258	<	}
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	<	public void testGet_Cancellation(){
685	<	final FutureTask ft = new FutureTask(new Callable(){
686	<	public Object call(){
687	<	try{
688	<	Thread.sleep(MEDIUM_DELAY_MS);
689	<	} catch(InterruptedException e){
690	<	threadFail("unexpected exception");
691	<	}
692	<	return Boolean.TRUE;
693	<	}
694	<	});
695	<	try {
696	<	Thread.sleep(SHORT_DELAY_MS);
697	<	Thread t = new Thread(new Runnable(){
698	<	public void run(){
699	<	try{
700	<	ft.get();
701	<	threadFail("should throw");
702	<	} catch(CancellationException success){
703	<	}
704	<	catch(Exception e){
705	<	threadFail("unexpected exception");
706	<	}
707	<	}
708	<	});
709	<	t.start();
710	<	ft.cancel(true);
711	<	t.join();
712	<	} catch(InterruptedException success){
713	<	fail("unexpected exception");
714	<	}
715	<	}
716	<
717	<	public void testGet_Cancellation2(){
718	<	final FutureTask ft = new FutureTask(new Callable(){
719	<	public Object call(){
298	<	try{
299	<	Thread.sleep(SHORT_DELAY_MS);
300	<	} catch(InterruptedException e) {
301	<	threadFail("unexpected exception");
302	<	}
303	<	return Boolean.TRUE;
304	<	}
305	<	});
306	<	try{
307	<	Thread.sleep(SHORT_DELAY_MS);
308	<	Thread t = new Thread(new Runnable(){
309	<	public void run(){
310	<	try{
311	<	ft.get(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
312	<	threadFail("should throw");
313	<	} catch(CancellationException success) {}
314	<	catch(Exception e){
315	<	threadFail("unexpected exception");
316	<	}
317	<	}
318	<	});
319	<	t.start();
320	<	Thread.sleep(SHORT_DELAY_MS);
321	<	ft.cancel(true);
322	<	Thread.sleep(SHORT_DELAY_MS);
323	<	t.join();
324	<	} catch(InterruptedException ie){
325	<	fail("unexpected exception");
326	<	}
327	<	}
328	<
329	<	public void testGet_ExecutionException(){
330	<	final FutureTask ft = new FutureTask(new Callable(){
331	<	public Object call(){
332	<	int i = 5/0;
333	<	return Boolean.TRUE;
334	<	}
335	<	});
336	<	try{
337	<	ft.run();
338	<	ft.get();
339	<	fail("should throw");
340	<	} catch(ExecutionException success){
341	<	}
342	<	catch(Exception e){
343	<	fail("unexpected exception");
344	<	}
345	<	}
346	<
347	<	public void testTimedGet_ExecutionException2(){
348	<	final FutureTask ft = new FutureTask(new Callable(){
349	<	public Object call(){
350	<	int i = 5/0;
351	<	return Boolean.TRUE;
352	<	}
353	<	});
354	<	try{
355	<	ft.run();
356	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
357	<	fail("should throw");
358	<	} catch(ExecutionException success) {
359	<	} catch(TimeoutException success) { } // unlikely but OK
360	<	catch(Exception e){
361	<	fail("unexpected exception");
362	<	}
363	<	}
364	<
365	<
366	<	public void testGet_InterruptedException(){
367	<	final FutureTask ft = new FutureTask(new NoOpCallable());
368	<	Thread t = new Thread(new Runnable(){
369	<	public void run(){
370	<	try{
371	<	ft.get();
372	<	threadFail("should throw");
373	<	} catch(InterruptedException success){
374	<	} catch(Exception e){
375	<	threadFail("unexpected exception");
376	<	}
377	<	}
378	<	});
379	<	try {
380	<	t.start();
381	<	Thread.sleep(SHORT_DELAY_MS);
382	<	t.interrupt();
383	<	t.join();
384	<	} catch(Exception e){
385	<	fail("unexpected exception");
386	<	}
387	<	}
388	<
389	<	public void testTimedGet_InterruptedException2(){
390	<	final FutureTask ft = new FutureTask(new NoOpCallable());
391	<	Thread t = new Thread(new Runnable(){
392	<	public void run(){
393	<	try{
394	<	ft.get(LONG_DELAY_MS,TimeUnit.MILLISECONDS);
395	<	threadFail("should throw");
396	<	} catch(InterruptedException success){}
397	<	catch(Exception e){
398	<	threadFail("unexpected exception");
399	<	}
400	<	}
401	<	});
402	<	try {
403	<	t.start();
404	<	Thread.sleep(SHORT_DELAY_MS);
405	<	t.interrupt();
406	<	t.join();
407	<	} catch(Exception e){
408	<	fail("unexpected exception");
409	<	}
410	<	}
411	<
412	<	public void testGet_TimeoutException(){
413	<	try{
414	<	FutureTask ft = new FutureTask(new NoOpCallable());
415	<	ft.get(1,TimeUnit.MILLISECONDS);
416	<	fail("should throw");
417	<	} catch(TimeoutException success){}
418	<	catch(Exception success){
419	<	fail("unexpected exception");
420	<	}
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	>	* 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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