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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 1.27 by jsr166, Sat Jun 18 14:16:42 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 static java.util.concurrent.TimeUnit.MILLISECONDS;
18	>	import static java.util.concurrent.TimeUnit.SECONDS;
19		import java.util.*;
20
21		public class FutureTaskTest extends JSR166TestCase {
22
23		public static void main(String[] args) {
24	<	junit.textui.TestRunner.run (suite());
24	>	junit.textui.TestRunner.run(suite());
25		}
26		public static Test suite() {
27	<	return new TestSuite(FutureTaskTest.class);
27	>	return new TestSuite(FutureTaskTest.class);
28	>	}
29	>
30	>	void checkNotDone(Future<?> f) {
31	>	assertFalse(f.isDone());
32	>	assertFalse(f.isCancelled());
33	>	}
34	>
35	>	<T> void checkCompletedNormally(Future<T> f, T expected) {
36	>	assertTrue(f.isDone());
37	>	assertFalse(f.isCancelled());
38	>
39	>	try {
40	>	assertSame(expected, f.get());
41	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
42	>	try {
43	>	assertSame(expected, f.get(5L, SECONDS));
44	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
45	>
46	>	assertFalse(f.cancel(false));
47	>	assertFalse(f.cancel(true));
48	>	}
49	>
50	>	void checkCancelled(Future<?> f) {
51	>	assertTrue(f.isDone());
52	>	assertTrue(f.isCancelled());
53	>
54	>	try {
55	>	f.get();
56	>	shouldThrow();
57	>	} catch (CancellationException success) {
58	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
59	>
60	>	try {
61	>	f.get(5L, SECONDS);
62	>	shouldThrow();
63	>	} catch (CancellationException success) {
64	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
65	>
66	>	assertFalse(f.cancel(false));
67	>	assertFalse(f.cancel(true));
68	>	}
69	>
70	>	void checkCompletedAbnormally(Future<?> f, Throwable t) {
71	>	assertTrue(f.isDone());
72	>	assertFalse(f.isCancelled());
73	>
74	>	try {
75	>	f.get();
76	>	shouldThrow();
77	>	} catch (ExecutionException success) {
78	>	assertSame(t, success.getCause());
79	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
80	>
81	>	try {
82	>	f.get(5L, SECONDS);
83	>	shouldThrow();
84	>	} catch (ExecutionException success) {
85	>	assertSame(t, success.getCause());
86	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
87	>
88	>	assertFalse(f.cancel(false));
89	>	assertFalse(f.cancel(true));
90		}
91
92		/**
93		* Subclass to expose protected methods
94		*/
95	<	static class MyFutureTask extends FutureTask {
96	<	public MyFutureTask(Callable r) { super(r); }
97	<	public boolean reset() { return super.reset(); }
27	<	public void setCancelled() { super.setCancelled(); }
28	<	public void setDone() { super.setDone(); }
95	>	static class PublicFutureTask extends FutureTask {
96	>	public PublicFutureTask(Callable r) { super(r); }
97	>	public boolean runAndReset() { return super.runAndReset(); }
98		public void set(Object x) { super.set(x); }
99		public void setException(Throwable t) { super.setException(t); }
100		}
101
102	<	public void testConstructor(){
102	>	/**
103	>	* Creating a future with a null callable throws NPE
104	>	*/
105	>	public void testConstructor() {
106		try {
107		FutureTask task = new FutureTask(null);
108	<	fail("should throw");
109	<	}
38	<	catch(NullPointerException success) {
39	<	}
108	>	shouldThrow();
109	>	} catch (NullPointerException success) {}
110		}
111
112	<	public void testConstructor2(){
112	>	/**
113	>	* creating a future with null runnable fails
114	>	*/
115	>	public void testConstructor2() {
116		try {
117		FutureTask task = new FutureTask(null, Boolean.TRUE);
118	<	fail("should throw");
119	<	}
47	<	catch(NullPointerException success) {
48	<	}
118	>	shouldThrow();
119	>	} catch (NullPointerException success) {}
120		}
121
122	<	public void testIsDone(){
123	<	FutureTask task = new FutureTask( new NoOpCallable());
124	<	task.run();
125	<	assertTrue(task.isDone());
126	<	assertFalse(task.isCancelled());
122	>	/**
123	>	* isDone is true when a task completes
124	>	*/
125	>	public void testIsDone() {
126	>	FutureTask task = new FutureTask(new NoOpCallable());
127	>	task.run();
128	>	assertTrue(task.isDone());
129	>	checkCompletedNormally(task, Boolean.TRUE);
130		}
131
132	<	public void testReset(){
133	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
134	<	task.run();
135	<	assertTrue(task.isDone());
136	<	assertTrue(task.reset());
132	>	/**
133	>	* runAndReset of a non-cancelled task succeeds
134	>	*/
135	>	public void testRunAndReset() {
136	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
137	>	assertTrue(task.runAndReset());
138	>	checkNotDone(task);
139		}
140
141	+	/**
142	+	* runAndReset after cancellation fails
143	+	*/
144		public void testResetAfterCancel() {
145	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
67	<	assertTrue(task.cancel(false));
68	<	task.run();
69	<	assertTrue(task.isDone());
70	<	assertTrue(task.isCancelled());
71	<	assertFalse(task.reset());
72	<	}
73	<
74	<	public void testSetDone() {
75	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
76	<	task.setDone();
77	<	assertTrue(task.isDone());
78	<	assertFalse(task.isCancelled());
79	<	}
80	<
81	<	public void testSetCancelled() {
82	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
145	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
146		assertTrue(task.cancel(false));
147	<	task.setCancelled();
148	<	assertTrue(task.isDone());
86	<	assertTrue(task.isCancelled());
147	>	assertFalse(task.runAndReset());
148	>	checkCancelled(task);
149		}
150
151	<	public void testSet() {
152	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
151	>	/**
152	>	* setting value causes get to return it
153	>	*/
154	>	public void testSet() throws Exception {
155	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
156		task.set(one);
157	<	try {
158	<	assertEquals(task.get(), one);
94	<	}
95	<	catch(Exception e) {
96	<	fail("unexpected exception");
97	<	}
157	>	assertSame(task.get(), one);
158	>	checkCompletedNormally(task, one);
159		}
160
161	<	public void testSetException() {
161	>	/**
162	>	* setException causes get to throw ExecutionException
163	>	*/
164	>	public void testSetException() throws Exception {
165		Exception nse = new NoSuchElementException();
166	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
166	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
167		task.setException(nse);
168		try {
169		Object x = task.get();
170	<	fail("should throw");
171	<	}
172	<	catch(ExecutionException ee) {
173	<	Throwable cause = ee.getCause();
110	<	assertEquals(cause, nse);
111	<	}
112	<	catch(Exception e) {
113	<	fail("unexpected exception");
170	>	shouldThrow();
171	>	} catch (ExecutionException success) {
172	>	assertSame(success.getCause(), nse);
173	>	checkCompletedAbnormally(task, nse);
174		}
175		}
176
177	+	/**
178	+	* Cancelling before running succeeds
179	+	*/
180		public void testCancelBeforeRun() {
181	<	FutureTask task = new FutureTask( new NoOpCallable());
181	>	FutureTask task = new FutureTask(new NoOpCallable());
182		assertTrue(task.cancel(false));
183	<	task.run();
184	<	assertTrue(task.isDone());
122	<	assertTrue(task.isCancelled());
183	>	task.run();
184	>	checkCancelled(task);
185		}
186
187	+	/**
188	+	* Cancel(true) before run succeeds
189	+	*/
190		public void testCancelBeforeRun2() {
191	<	FutureTask task = new FutureTask( new NoOpCallable());
191	>	FutureTask task = new FutureTask(new NoOpCallable());
192		assertTrue(task.cancel(true));
193	<	task.run();
194	<	assertTrue(task.isDone());
130	<	assertTrue(task.isCancelled());
193	>	task.run();
194	>	checkCancelled(task);
195		}
196
197	+	/**
198	+	* cancel of a completed task fails
199	+	*/
200		public void testCancelAfterRun() {
201	<	FutureTask task = new FutureTask( new NoOpCallable());
202	<	task.run();
201	>	FutureTask task = new FutureTask(new NoOpCallable());
202	>	task.run();
203		assertFalse(task.cancel(false));
204	<	assertTrue(task.isDone());
138	<	assertFalse(task.isCancelled());
204	>	checkCompletedNormally(task, Boolean.TRUE);
205		}
206
207	<	public void testCancelInterrupt(){
208	<	FutureTask task = new FutureTask( new Callable() {
209	<	public Object call() {
210	<	try {
211	<	Thread.sleep(MEDIUM_DELAY_MS);
212	<	threadFail("should throw");
207	>	/**
208	>	* cancel(true) interrupts a running task
209	>	*/
210	>	public void testCancelInterrupt() throws InterruptedException {
211	>	final CountDownLatch threadStarted = new CountDownLatch(1);
212	>	final FutureTask task =
213	>	new FutureTask(new CheckedCallable<Object>() {
214	>	public Object realCall() {
215	>	threadStarted.countDown();
216	>	long t0 = System.nanoTime();
217	>	for (;;) {
218	>	if (Thread.interrupted())
219	>	return Boolean.TRUE;
220	>	if (millisElapsedSince(t0) > MEDIUM_DELAY_MS)
221	>	fail("interrupt not delivered");
222	>	Thread.yield();
223		}
224	<	catch (InterruptedException success) {}
224	>	}});
225	>
226	>	Thread t = newStartedThread(task);
227	>	threadStarted.await();
228	>	assertTrue(task.cancel(true));
229	>	checkCancelled(task);
230	>	awaitTermination(t, MEDIUM_DELAY_MS);
231	>	checkCancelled(task);
232	>	}
233	>
234	>	/**
235	>	* cancel(false) does not interrupt a running task
236	>	*/
237	>	public void testCancelNoInterrupt() throws InterruptedException {
238	>	final CountDownLatch threadStarted = new CountDownLatch(1);
239	>	final CountDownLatch cancelled = new CountDownLatch(1);
240	>	final FutureTask<Boolean> task =
241	>	new FutureTask<Boolean>(new CheckedCallable<Boolean>() {
242	>	public Boolean realCall() throws InterruptedException {
243	>	threadStarted.countDown();
244	>	cancelled.await(MEDIUM_DELAY_MS, MILLISECONDS);
245	>	assertFalse(Thread.interrupted());
246		return Boolean.TRUE;
247	<	} });
248	<	Thread t = new  Thread(task);
249	<	t.start();
250	<
251	<	try{
252	<	Thread.sleep(SHORT_DELAY_MS);
253	<	assertTrue(task.cancel(true));
254	<	t.join();
255	<	assertTrue(task.isDone());
159	<	assertTrue(task.isCancelled());
160	<	} catch(InterruptedException e){
161	<	fail("unexpected exception");
162	<	}
247	>	}});
248	>
249	>	Thread t = newStartedThread(task);
250	>	threadStarted.await();
251	>	assertTrue(task.cancel(false));
252	>	checkCancelled(task);
253	>	cancelled.countDown();
254	>	awaitTermination(t, MEDIUM_DELAY_MS);
255	>	checkCancelled(task);
256		}
257
258	+	/**
259	+	* run in one thread causes get in another thread to retrieve value
260	+	*/
261	+	public void testGetRun() throws InterruptedException {
262	+	final CountDownLatch threadStarted = new CountDownLatch(1);
263
264	<	public void testCancelNoInterrupt(){
265	<	FutureTask task = new FutureTask( new Callable() {
266	<	public Object call() {
169	<	try {
170	<	Thread.sleep(MEDIUM_DELAY_MS);
171	<	}
172	<	catch (InterruptedException success) {
173	<	threadFail("should not interrupt");
174	<	}
264	>	final FutureTask task =
265	>	new FutureTask(new CheckedCallable<Object>() {
266	>	public Object realCall() throws InterruptedException {
267		return Boolean.TRUE;
268	<	} });
269	<	Thread t = new  Thread(task);
270	<	t.start();
271	<
272	<	try{
273	<	Thread.sleep(SHORT_DELAY_MS);
274	<	assertTrue(task.cancel(false));
275	<	t.join();
276	<	assertTrue(task.isDone());
277	<	assertTrue(task.isCancelled());
278	<	} catch(InterruptedException e){
279	<	fail("unexpected exception");
280	<	}
268	>	}});
269	>
270	>	Thread t = newStartedThread(new CheckedRunnable() {
271	>	public void realRun() throws Exception {
272	>	threadStarted.countDown();
273	>	assertSame(Boolean.TRUE, task.get());
274	>	}});
275	>
276	>	threadStarted.await();
277	>	checkNotDone(task);
278	>	assertTrue(t.isAlive());
279	>	task.run();
280	>	checkCompletedNormally(task, Boolean.TRUE);
281	>	awaitTermination(t, MEDIUM_DELAY_MS);
282		}
283
284	<	public void testGet1() {
285	<	final FutureTask ft = new FutureTask(new Callable(){
286	<	public Object call(){
287	<	try{
288	<	Thread.sleep(MEDIUM_DELAY_MS);
289	<	} catch(InterruptedException e){
290	<	threadFail("unexpected exception");
291	<	}
284	>	/**
285	>	* set in one thread causes get in another thread to retrieve value
286	>	*/
287	>	public void testGetSet() throws InterruptedException {
288	>	final CountDownLatch threadStarted = new CountDownLatch(1);
289	>
290	>	final PublicFutureTask task =
291	>	new PublicFutureTask(new CheckedCallable<Object>() {
292	>	public Object realCall() throws InterruptedException {
293		return Boolean.TRUE;
294	<	}
295	<	});
296	<	Thread t = new Thread(new Runnable(){
297	<	public void run(){
298	<	try{
299	<	ft.get();
300	<	} catch(Exception e){
301	<	threadFail("unexpected exception");
302	<	}
303	<	}
304	<	});
305	<	try{
306	<	assertFalse(ft.isDone());
307	<	assertFalse(ft.isCancelled());
308	<	t.start();
309	<	Thread.sleep(SHORT_DELAY_MS);
310	<	ft.run();
311	<	t.join();
312	<	assertTrue(ft.isDone());
313	<	assertFalse(ft.isCancelled());
314	<	} catch(InterruptedException e){
315	<	fail("unexpected exception");
316	<
317	<	}
318	<	}
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	<	}
294	>	}});
295	>
296	>	Thread t = newStartedThread(new CheckedRunnable() {
297	>	public void realRun() throws Exception {
298	>	threadStarted.countDown();
299	>	assertSame(Boolean.FALSE, task.get());
300	>	}});
301	>
302	>	threadStarted.await();
303	>	checkNotDone(task);
304	>	assertTrue(t.isAlive());
305	>	task.set(Boolean.FALSE);
306	>	checkCompletedNormally(task, Boolean.FALSE);
307	>	awaitTermination(t, MEDIUM_DELAY_MS);
308	>	}
309	>
310	>	/**
311	>	* run in one thread causes timed get in another thread to retrieve value
312	>	*/
313	>	public void testTimedGetRun() throws InterruptedException {
314	>	final CountDownLatch threadStarted = new CountDownLatch(1);
315	>
316	>	final FutureTask task =
317	>	new FutureTask(new CheckedCallable<Object>() {
318	>	public Object realCall() throws InterruptedException {
319		return Boolean.TRUE;
320	<	}
321	<	});
322	<	Thread t = new Thread(new Runnable(){
323	<	public void run(){
324	<	try{
325	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
326	<	} catch(TimeoutException success) {
327	<	} catch(Exception e){
328	<	threadFail("unexpected exception");
329	<	}
330	<	}
331	<	});
332	<	try{
333	<	assertFalse(ft.isDone());
334	<	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	<	}
320	>	}});
321	>
322	>	Thread t = newStartedThread(new CheckedRunnable() {
323	>	public void realRun() throws Exception {
324	>	threadStarted.countDown();
325	>	assertSame(Boolean.TRUE,
326	>	task.get(MEDIUM_DELAY_MS, MILLISECONDS));
327	>	}});
328	>
329	>	threadStarted.await();
330	>	checkNotDone(task);
331	>	assertTrue(t.isAlive());
332	>	task.run();
333	>	checkCompletedNormally(task, Boolean.TRUE);
334	>	awaitTermination(t, MEDIUM_DELAY_MS);
335		}
336
337	+	/**
338	+	* set in one thread causes timed get in another thread to retrieve value
339	+	*/
340	+	public void testTimedGetSet() throws InterruptedException {
341	+	final CountDownLatch threadStarted = new CountDownLatch(1);
342
343	<	public void testGet_Cancellation(){
344	<	final FutureTask ft = new FutureTask(new Callable(){
345	<	public Object call(){
265	<	try{
266	<	Thread.sleep(MEDIUM_DELAY_MS);
267	<	} catch(InterruptedException e){
268	<	threadFail("unexpected exception");
269	<	}
343	>	final PublicFutureTask task =
344	>	new PublicFutureTask(new CheckedCallable<Object>() {
345	>	public Object realCall() throws InterruptedException {
346		return Boolean.TRUE;
347	<	}
348	<	});
349	<	try {
350	<	Thread.sleep(SHORT_DELAY_MS);
351	<	Thread t = new Thread(new Runnable(){
352	<	public void run(){
353	<	try{
354	<	ft.get();
355	<	threadFail("should throw");
356	<	} catch(CancellationException success){
357	<	}
358	<	catch(Exception e){
359	<	threadFail("unexpected exception");
360	<	}
361	<	}
286	<	});
287	<	t.start();
288	<	ft.cancel(true);
289	<	t.join();
290	<	} catch(InterruptedException success){
291	<	fail("unexpected exception");
292	<	}
347	>	}});
348	>
349	>	Thread t = newStartedThread(new CheckedRunnable() {
350	>	public void realRun() throws Exception {
351	>	threadStarted.countDown();
352	>	assertSame(Boolean.FALSE,
353	>	task.get(MEDIUM_DELAY_MS, MILLISECONDS));
354	>	}});
355	>
356	>	threadStarted.await();
357	>	checkNotDone(task);
358	>	assertTrue(t.isAlive());
359	>	task.set(Boolean.FALSE);
360	>	checkCompletedNormally(task, Boolean.FALSE);
361	>	awaitTermination(t, MEDIUM_DELAY_MS);
362		}
363	<
364	<	public void testGet_Cancellation2(){
365	<	final FutureTask ft = new FutureTask(new Callable(){
366	<	public Object call(){
367	<	try{
368	<	Thread.sleep(SHORT_DELAY_MS);
369	<	} catch(InterruptedException e) {
370	<	threadFail("unexpected exception");
371	<	}
372	<	return Boolean.TRUE;
373	<	}
374	<	});
375	<	try{
376	<	Thread.sleep(SHORT_DELAY_MS);
377	<	Thread t = new Thread(new Runnable(){
378	<	public void run(){
379	<	try{
380	<	ft.get(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
381	<	threadFail("should throw");
382	<	} catch(CancellationException success) {}
383	<	catch(Exception e){
384	<	threadFail("unexpected exception");
385	<	}
386	<	}
387	<	});
388	<	t.start();
389	<	Thread.sleep(SHORT_DELAY_MS);
390	<	ft.cancel(true);
322	<	Thread.sleep(SHORT_DELAY_MS);
323	<	t.join();
324	<	} catch(InterruptedException ie){
325	<	fail("unexpected exception");
326	<	}
363	>
364	>	/**
365	>	* Cancelling a task causes timed get in another thread to throw
366	>	* CancellationException
367	>	*/
368	>	public void testTimedGet_Cancellation() throws InterruptedException {
369	>	final CountDownLatch threadStarted = new CountDownLatch(2);
370	>	final FutureTask task =
371	>	new FutureTask(new CheckedInterruptedCallable<Object>() {
372	>	public Object realCall() throws InterruptedException {
373	>	threadStarted.countDown();
374	>	delay(LONG_DELAY_MS);
375	>	return Boolean.TRUE;
376	>	}});
377	>
378	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
379	>	public void realRun() throws Exception {
380	>	threadStarted.countDown();
381	>	task.get(MEDIUM_DELAY_MS, MILLISECONDS);
382	>	}};
383	>	Thread t2 = new Thread(task);
384	>	t1.start();
385	>	t2.start();
386	>	threadStarted.await();
387	>	task.cancel(true);
388	>	awaitTermination(t1, MEDIUM_DELAY_MS);
389	>	awaitTermination(t2, MEDIUM_DELAY_MS);
390	>	checkCancelled(task);
391		}
392
393	<	public void testGet_ExecutionException(){
394	<	final FutureTask ft = new FutureTask(new Callable(){
395	<	public Object call(){
396	<	int i = 5/0;
397	<	return Boolean.TRUE;
398	<	}
399	<	});
400	<	try{
401	<	ft.run();
402	<	ft.get();
403	<	fail("should throw");
404	<	} catch(ExecutionException success){
405	<	}
406	<	catch(Exception e){
407	<	fail("unexpected exception");
408	<	}
409	<	}
410	<
411	<	public void testTimedGet_ExecutionException2(){
412	<	final FutureTask ft = new FutureTask(new Callable(){
413	<	public Object call(){
414	<	int i = 5/0;
415	<	return Boolean.TRUE;
416	<	}
417	<	});
418	<	try{
419	<	ft.run();
420	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
421	<	fail("should throw");
422	<	} catch(ExecutionException success) {
423	<	} catch(TimeoutException success) { } // unlikely but OK
424	<	catch(Exception e){
425	<	fail("unexpected exception");
426	<	}
427	<	}
428	<
429	<
430	<	public void testGet_InterruptedException(){
431	<	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	<	});
393	>	/**
394	>	* Cancelling a task causes get in another thread to throw
395	>	* CancellationException
396	>	*/
397	>	public void testGet_Cancellation() throws InterruptedException {
398	>	final CountDownLatch threadStarted = new CountDownLatch(2);
399	>	final FutureTask task =
400	>	new FutureTask(new CheckedInterruptedCallable<Object>() {
401	>	public Object realCall() throws InterruptedException {
402	>	threadStarted.countDown();
403	>	delay(LONG_DELAY_MS);
404	>	return Boolean.TRUE;
405	>	}});
406	>
407	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
408	>	public void realRun() throws Exception {
409	>	threadStarted.countDown();
410	>	task.get();
411	>	}};
412	>	Thread t2 = new Thread(task);
413	>	t1.start();
414	>	t2.start();
415	>	threadStarted.await();
416	>	task.cancel(true);
417	>	awaitTermination(t1, MEDIUM_DELAY_MS);
418	>	awaitTermination(t2, MEDIUM_DELAY_MS);
419	>	checkCancelled(task);
420	>	}
421	>
422	>	/**
423	>	* A runtime exception in task causes get to throw ExecutionException
424	>	*/
425	>	public void testGet_ExecutionException() throws InterruptedException {
426	>	final FutureTask task = new FutureTask(new Callable() {
427	>	public Object call() {
428	>	return 5/0;
429	>	}});
430	>
431	>	task.run();
432		try {
433	<	t.start();
434	<	Thread.sleep(SHORT_DELAY_MS);
435	<	t.interrupt();
436	<	t.join();
437	<	} catch(Exception e){
385	<	fail("unexpected exception");
433	>	task.get();
434	>	shouldThrow();
435	>	} catch (ExecutionException success) {
436	>	assertTrue(success.getCause() instanceof ArithmeticException);
437	>	checkCompletedAbnormally(task, success.getCause());
438		}
439		}
440
441	<	public void testTimedGet_InterruptedException2(){
442	<	final FutureTask ft = new FutureTask(new NoOpCallable());
443	<	Thread t = new Thread(new Runnable(){
444	<	public void run(){
445	<	try{
446	<	ft.get(LONG_DELAY_MS,TimeUnit.MILLISECONDS);
447	<	threadFail("should throw");
448	<	} catch(InterruptedException success){}
449	<	catch(Exception e){
450	<	threadFail("unexpected exception");
451	<	}
452	<	}
453	<	});
454	<	try {
455	<	t.start();
456	<	Thread.sleep(SHORT_DELAY_MS);
405	<	t.interrupt();
406	<	t.join();
407	<	} catch(Exception e){
408	<	fail("unexpected exception");
441	>	/**
442	>	* A runtime exception in task causes timed get to throw ExecutionException
443	>	*/
444	>	public void testTimedGet_ExecutionException2() throws Exception {
445	>	final FutureTask task = new FutureTask(new Callable() {
446	>	public Object call() {
447	>	return 5/0;
448	>	}});
449	>
450	>	task.run();
451	>	try {
452	>	task.get(SHORT_DELAY_MS, MILLISECONDS);
453	>	shouldThrow();
454	>	} catch (ExecutionException success) {
455	>	assertTrue(success.getCause() instanceof ArithmeticException);
456	>	checkCompletedAbnormally(task, success.getCause());
457		}
458		}
459	<
460	<	public void testGet_TimeoutException(){
461	<	try{
462	<	FutureTask ft = new FutureTask(new NoOpCallable());
463	<	ft.get(1,TimeUnit.MILLISECONDS);
464	<	fail("should throw");
465	<	} catch(TimeoutException success){}
466	<	catch(Exception success){
467	<	fail("unexpected exception");
468	<	}
459	>
460	>	/**
461	>	* Interrupting a waiting get causes it to throw InterruptedException
462	>	*/
463	>	public void testGet_InterruptedException() throws InterruptedException {
464	>	final CountDownLatch threadStarted = new CountDownLatch(1);
465	>	final FutureTask task = new FutureTask(new NoOpCallable());
466	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
467	>	public void realRun() throws Exception {
468	>	threadStarted.countDown();
469	>	task.get();
470	>	}});
471	>
472	>	threadStarted.await();
473	>	t.interrupt();
474	>	awaitTermination(t, MEDIUM_DELAY_MS);
475	>	checkNotDone(task);
476		}
477	<
477	>
478	>	/**
479	>	* Interrupting a waiting timed get causes it to throw InterruptedException
480	>	*/
481	>	public void testTimedGet_InterruptedException2() throws InterruptedException {
482	>	final CountDownLatch threadStarted = new CountDownLatch(1);
483	>	final FutureTask task = new FutureTask(new NoOpCallable());
484	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
485	>	public void realRun() throws Exception {
486	>	threadStarted.countDown();
487	>	task.get(LONG_DELAY_MS, MILLISECONDS);
488	>	}});
489	>
490	>	threadStarted.await();
491	>	t.interrupt();
492	>	awaitTermination(t, MEDIUM_DELAY_MS);
493	>	checkNotDone(task);
494	>	}
495	>
496	>	/**
497	>	* A timed out timed get throws TimeoutException
498	>	*/
499	>	public void testGet_TimeoutException() throws Exception {
500	>	try {
501	>	FutureTask task = new FutureTask(new NoOpCallable());
502	>	task.get(1, MILLISECONDS);
503	>	shouldThrow();
504	>	} catch (TimeoutException success) {}
505	>	}
506	>
507		}

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