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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 1.26 by jsr166, Tue May 31 16:16:23 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());
145	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
146		assertTrue(task.cancel(false));
147	<	task.run();
148	<	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());
147	>	assertFalse(task.runAndReset());
148	>	checkCancelled(task);
149		}
150
81	–	public void testSetCancelled() {
82	–	MyFutureTask task = new MyFutureTask(new NoOpCallable());
83	–	assertTrue(task.cancel(false));
84	–	task.setCancelled();
85	–	assertTrue(task.isDone());
86	–	assertTrue(task.isCancelled());
87	–	}
151
152	<	public void testSet() {
153	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
152	>	/**
153	>	* setting value causes get to return it
154	>	*/
155	>	public void testSet() throws Exception {
156	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
157		task.set(one);
158	<	try {
159	<	assertEquals(task.get(), one);
94	<	}
95	<	catch(Exception e) {
96	<	fail("unexpected exception");
97	<	}
158	>	assertSame(task.get(), one);
159	>	checkCompletedNormally(task, one);
160		}
161
162	<	public void testSetException() {
162	>	/**
163	>	* setException causes get to throw ExecutionException
164	>	*/
165	>	public void testSetException() throws Exception {
166		Exception nse = new NoSuchElementException();
167	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
167	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
168		task.setException(nse);
169		try {
170		Object x = task.get();
171	<	fail("should throw");
172	<	}
173	<	catch(ExecutionException ee) {
174	<	Throwable cause = ee.getCause();
110	<	assertEquals(cause, nse);
111	<	}
112	<	catch(Exception e) {
113	<	fail("unexpected exception");
171	>	shouldThrow();
172	>	} catch (ExecutionException success) {
173	>	assertSame(success.getCause(), nse);
174	>	checkCompletedAbnormally(task, nse);
175		}
176		}
177
178	+	/**
179	+	* Cancelling before running succeeds
180	+	*/
181		public void testCancelBeforeRun() {
182	<	FutureTask task = new FutureTask( new NoOpCallable());
182	>	FutureTask task = new FutureTask(new NoOpCallable());
183		assertTrue(task.cancel(false));
184	<	task.run();
185	<	assertTrue(task.isDone());
122	<	assertTrue(task.isCancelled());
184	>	task.run();
185	>	checkCancelled(task);
186		}
187
188	+	/**
189	+	* Cancel(true) before run succeeds
190	+	*/
191		public void testCancelBeforeRun2() {
192	<	FutureTask task = new FutureTask( new NoOpCallable());
192	>	FutureTask task = new FutureTask(new NoOpCallable());
193		assertTrue(task.cancel(true));
194	<	task.run();
195	<	assertTrue(task.isDone());
130	<	assertTrue(task.isCancelled());
194	>	task.run();
195	>	checkCancelled(task);
196		}
197
198	+	/**
199	+	* cancel of a completed task fails
200	+	*/
201		public void testCancelAfterRun() {
202	<	FutureTask task = new FutureTask( new NoOpCallable());
203	<	task.run();
202	>	FutureTask task = new FutureTask(new NoOpCallable());
203	>	task.run();
204		assertFalse(task.cancel(false));
205	<	assertTrue(task.isDone());
138	<	assertFalse(task.isCancelled());
205	>	checkCompletedNormally(task, Boolean.TRUE);
206		}
207
208	<	public void testCancelInterrupt(){
209	<	FutureTask task = new FutureTask( new Callable() {
210	<	public Object call() {
211	<	try {
212	<	Thread.sleep(MEDIUM_DELAY_MS);
213	<	threadFail("should throw");
208	>	/**
209	>	* cancel(true) interrupts a running task
210	>	*/
211	>	public void testCancelInterrupt() throws InterruptedException {
212	>	final CountDownLatch threadStarted = new CountDownLatch(1);
213	>	final FutureTask task =
214	>	new FutureTask(new CheckedCallable<Object>() {
215	>	public Object realCall() {
216	>	threadStarted.countDown();
217	>	long t0 = System.nanoTime();
218	>	for (;;) {
219	>	if (Thread.interrupted())
220	>	return Boolean.TRUE;
221	>	if (millisElapsedSince(t0) > MEDIUM_DELAY_MS)
222	>	fail("interrupt not delivered");
223	>	Thread.yield();
224		}
225	<	catch (InterruptedException success) {}
225	>	}});
226	>
227	>	Thread t = newStartedThread(task);
228	>	threadStarted.await();
229	>	assertTrue(task.cancel(true));
230	>	checkCancelled(task);
231	>	awaitTermination(t, MEDIUM_DELAY_MS);
232	>	checkCancelled(task);
233	>	}
234	>
235	>	/**
236	>	* cancel(false) does not interrupt a running task
237	>	*/
238	>	public void testCancelNoInterrupt() throws InterruptedException {
239	>	final CountDownLatch threadStarted = new CountDownLatch(1);
240	>	final CountDownLatch cancelled = new CountDownLatch(1);
241	>	final FutureTask<Boolean> task =
242	>	new FutureTask<Boolean>(new CheckedCallable<Boolean>() {
243	>	public Boolean realCall() throws InterruptedException {
244	>	threadStarted.countDown();
245	>	cancelled.await(MEDIUM_DELAY_MS, MILLISECONDS);
246	>	assertFalse(Thread.interrupted());
247		return Boolean.TRUE;
248	<	} });
249	<	Thread t = new  Thread(task);
250	<	t.start();
251	<
252	<	try{
253	<	Thread.sleep(SHORT_DELAY_MS);
254	<	assertTrue(task.cancel(true));
255	<	t.join();
256	<	assertTrue(task.isDone());
159	<	assertTrue(task.isCancelled());
160	<	} catch(InterruptedException e){
161	<	fail("unexpected exception");
162	<	}
248	>	}});
249	>
250	>	Thread t = newStartedThread(task);
251	>	threadStarted.await();
252	>	assertTrue(task.cancel(false));
253	>	checkCancelled(task);
254	>	cancelled.countDown();
255	>	awaitTermination(t, MEDIUM_DELAY_MS);
256	>	checkCancelled(task);
257		}
258
259	+	/**
260	+	* run in one thread causes get in another thread to retrieve value
261	+	*/
262	+	public void testGetRun() throws InterruptedException {
263	+	final CountDownLatch threadStarted = new CountDownLatch(1);
264
265	<	public void testCancelNoInterrupt(){
266	<	FutureTask task = new FutureTask( new Callable() {
267	<	public Object call() {
169	<	try {
170	<	Thread.sleep(MEDIUM_DELAY_MS);
171	<	}
172	<	catch (InterruptedException success) {
173	<	threadFail("should not interrupt");
174	<	}
265	>	final FutureTask task =
266	>	new FutureTask(new CheckedCallable<Object>() {
267	>	public Object realCall() throws InterruptedException {
268		return Boolean.TRUE;
269	<	} });
270	<	Thread t = new  Thread(task);
271	<	t.start();
272	<
273	<	try{
274	<	Thread.sleep(SHORT_DELAY_MS);
275	<	assertTrue(task.cancel(false));
276	<	t.join();
277	<	assertTrue(task.isDone());
278	<	assertTrue(task.isCancelled());
279	<	} catch(InterruptedException e){
280	<	fail("unexpected exception");
281	<	}
269	>	}});
270	>
271	>	Thread t = newStartedThread(new CheckedRunnable() {
272	>	public void realRun() throws Exception {
273	>	threadStarted.countDown();
274	>	assertSame(Boolean.TRUE, task.get());
275	>	}});
276	>
277	>	threadStarted.await();
278	>	checkNotDone(task);
279	>	assertTrue(t.isAlive());
280	>	task.run();
281	>	checkCompletedNormally(task, Boolean.TRUE);
282	>	awaitTermination(t, MEDIUM_DELAY_MS);
283		}
284
285	<	public void testGet1() {
286	<	final FutureTask ft = new FutureTask(new Callable(){
287	<	public Object call(){
288	<	try{
289	<	Thread.sleep(MEDIUM_DELAY_MS);
290	<	} catch(InterruptedException e){
291	<	threadFail("unexpected exception");
292	<	}
285	>	/**
286	>	* set in one thread causes get in another thread to retrieve value
287	>	*/
288	>	public void testGetSet() throws InterruptedException {
289	>	final CountDownLatch threadStarted = new CountDownLatch(1);
290	>
291	>	final PublicFutureTask task =
292	>	new PublicFutureTask(new CheckedCallable<Object>() {
293	>	public Object realCall() throws InterruptedException {
294		return Boolean.TRUE;
295	<	}
296	<	});
297	<	Thread t = new Thread(new Runnable(){
298	<	public void run(){
299	<	try{
300	<	ft.get();
301	<	} catch(Exception e){
302	<	threadFail("unexpected exception");
303	<	}
304	<	}
305	<	});
306	<	try{
307	<	assertFalse(ft.isDone());
308	<	assertFalse(ft.isCancelled());
309	<	t.start();
310	<	Thread.sleep(SHORT_DELAY_MS);
311	<	ft.run();
312	<	t.join();
313	<	assertTrue(ft.isDone());
314	<	assertFalse(ft.isCancelled());
315	<	} catch(InterruptedException e){
316	<	fail("unexpected exception");
317	<
318	<	}
319	<	}
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	<	}
295	>	}});
296	>
297	>	Thread t = newStartedThread(new CheckedRunnable() {
298	>	public void realRun() throws Exception {
299	>	threadStarted.countDown();
300	>	assertSame(Boolean.FALSE, task.get());
301	>	}});
302	>
303	>	threadStarted.await();
304	>	checkNotDone(task);
305	>	assertTrue(t.isAlive());
306	>	task.set(Boolean.FALSE);
307	>	checkCompletedNormally(task, Boolean.FALSE);
308	>	awaitTermination(t, MEDIUM_DELAY_MS);
309	>	}
310	>
311	>	/**
312	>	* run in one thread causes timed get in another thread to retrieve value
313	>	*/
314	>	public void testTimedGetRun() throws InterruptedException {
315	>	final CountDownLatch threadStarted = new CountDownLatch(1);
316	>
317	>	final FutureTask task =
318	>	new FutureTask(new CheckedCallable<Object>() {
319	>	public Object realCall() throws InterruptedException {
320		return Boolean.TRUE;
321	<	}
322	<	});
323	<	Thread t = new Thread(new Runnable(){
324	<	public void run(){
325	<	try{
326	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
327	<	} catch(TimeoutException success) {
328	<	} catch(Exception e){
329	<	threadFail("unexpected exception");
330	<	}
331	<	}
332	<	});
333	<	try{
334	<	assertFalse(ft.isDone());
335	<	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	<	}
321	>	}});
322	>
323	>	Thread t = newStartedThread(new CheckedRunnable() {
324	>	public void realRun() throws Exception {
325	>	threadStarted.countDown();
326	>	assertSame(Boolean.TRUE,
327	>	task.get(MEDIUM_DELAY_MS, MILLISECONDS));
328	>	}});
329	>
330	>	threadStarted.await();
331	>	checkNotDone(task);
332	>	assertTrue(t.isAlive());
333	>	task.run();
334	>	checkCompletedNormally(task, Boolean.TRUE);
335	>	awaitTermination(t, MEDIUM_DELAY_MS);
336		}
337
338	+	/**
339	+	* set in one thread causes timed get in another thread to retrieve value
340	+	*/
341	+	public void testTimedGetSet() throws InterruptedException {
342	+	final CountDownLatch threadStarted = new CountDownLatch(1);
343
344	<	public void testGet_Cancellation(){
345	<	final FutureTask ft = new FutureTask(new Callable(){
346	<	public Object call(){
265	<	try{
266	<	Thread.sleep(MEDIUM_DELAY_MS);
267	<	} catch(InterruptedException e){
268	<	threadFail("unexpected exception");
269	<	}
344	>	final PublicFutureTask task =
345	>	new PublicFutureTask(new CheckedCallable<Object>() {
346	>	public Object realCall() throws InterruptedException {
347		return Boolean.TRUE;
348	<	}
349	<	});
350	<	try {
351	<	Thread.sleep(SHORT_DELAY_MS);
352	<	Thread t = new Thread(new Runnable(){
353	<	public void run(){
354	<	try{
355	<	ft.get();
356	<	threadFail("should throw");
357	<	} catch(CancellationException success){
358	<	}
359	<	catch(Exception e){
360	<	threadFail("unexpected exception");
361	<	}
362	<	}
286	<	});
287	<	t.start();
288	<	ft.cancel(true);
289	<	t.join();
290	<	} catch(InterruptedException success){
291	<	fail("unexpected exception");
292	<	}
348	>	}});
349	>
350	>	Thread t = newStartedThread(new CheckedRunnable() {
351	>	public void realRun() throws Exception {
352	>	threadStarted.countDown();
353	>	assertSame(Boolean.FALSE,
354	>	task.get(MEDIUM_DELAY_MS, MILLISECONDS));
355	>	}});
356	>
357	>	threadStarted.await();
358	>	checkNotDone(task);
359	>	assertTrue(t.isAlive());
360	>	task.set(Boolean.FALSE);
361	>	checkCompletedNormally(task, Boolean.FALSE);
362	>	awaitTermination(t, MEDIUM_DELAY_MS);
363		}
364	<
365	<	public void testGet_Cancellation2(){
366	<	final FutureTask ft = new FutureTask(new Callable(){
367	<	public Object call(){
368	<	try{
369	<	Thread.sleep(SHORT_DELAY_MS);
370	<	} catch(InterruptedException e) {
371	<	threadFail("unexpected exception");
372	<	}
373	<	return Boolean.TRUE;
374	<	}
375	<	});
376	<	try{
377	<	Thread.sleep(SHORT_DELAY_MS);
378	<	Thread t = new Thread(new Runnable(){
379	<	public void run(){
380	<	try{
381	<	ft.get(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
382	<	threadFail("should throw");
383	<	} catch(CancellationException success) {}
384	<	catch(Exception e){
385	<	threadFail("unexpected exception");
386	<	}
387	<	}
388	<	});
389	<	t.start();
390	<	Thread.sleep(SHORT_DELAY_MS);
391	<	ft.cancel(true);
322	<	Thread.sleep(SHORT_DELAY_MS);
323	<	t.join();
324	<	} catch(InterruptedException ie){
325	<	fail("unexpected exception");
326	<	}
364	>
365	>	/**
366	>	* Cancelling a task causes timed get in another thread to throw
367	>	* CancellationException
368	>	*/
369	>	public void testTimedGet_Cancellation() throws InterruptedException {
370	>	final CountDownLatch threadStarted = new CountDownLatch(2);
371	>	final FutureTask task =
372	>	new FutureTask(new CheckedInterruptedCallable<Object>() {
373	>	public Object realCall() throws InterruptedException {
374	>	threadStarted.countDown();
375	>	delay(LONG_DELAY_MS);
376	>	return Boolean.TRUE;
377	>	}});
378	>
379	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
380	>	public void realRun() throws Exception {
381	>	threadStarted.countDown();
382	>	task.get(MEDIUM_DELAY_MS, MILLISECONDS);
383	>	}};
384	>	Thread t2 = new Thread(task);
385	>	t1.start();
386	>	t2.start();
387	>	threadStarted.await();
388	>	task.cancel(true);
389	>	awaitTermination(t1, MEDIUM_DELAY_MS);
390	>	awaitTermination(t2, MEDIUM_DELAY_MS);
391	>	checkCancelled(task);
392		}
393
394	<	public void testGet_ExecutionException(){
395	<	final FutureTask ft = new FutureTask(new Callable(){
396	<	public Object call(){
397	<	int i = 5/0;
398	<	return Boolean.TRUE;
399	<	}
400	<	});
401	<	try{
402	<	ft.run();
403	<	ft.get();
404	<	fail("should throw");
405	<	} catch(ExecutionException success){
406	<	}
407	<	catch(Exception e){
408	<	fail("unexpected exception");
409	<	}
410	<	}
411	<
412	<	public void testTimedGet_ExecutionException2(){
413	<	final FutureTask ft = new FutureTask(new Callable(){
414	<	public Object call(){
415	<	int i = 5/0;
416	<	return Boolean.TRUE;
417	<	}
418	<	});
419	<	try{
420	<	ft.run();
421	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
422	<	fail("should throw");
423	<	} catch(ExecutionException success) {
424	<	} catch(TimeoutException success) { } // unlikely but OK
425	<	catch(Exception e){
426	<	fail("unexpected exception");
427	<	}
428	<	}
429	<
430	<
431	<	public void testGet_InterruptedException(){
432	<	final FutureTask ft = new FutureTask(new NoOpCallable());
433	<	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	<	});
394	>	/**
395	>	* Cancelling a task causes get in another thread to throw
396	>	* CancellationException
397	>	*/
398	>	public void testGet_Cancellation() throws InterruptedException {
399	>	final CountDownLatch threadStarted = new CountDownLatch(2);
400	>	final FutureTask task =
401	>	new FutureTask(new CheckedInterruptedCallable<Object>() {
402	>	public Object realCall() throws InterruptedException {
403	>	threadStarted.countDown();
404	>	delay(LONG_DELAY_MS);
405	>	return Boolean.TRUE;
406	>	}});
407	>
408	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
409	>	public void realRun() throws Exception {
410	>	threadStarted.countDown();
411	>	task.get();
412	>	}};
413	>	Thread t2 = new Thread(task);
414	>	t1.start();
415	>	t2.start();
416	>	threadStarted.await();
417	>	task.cancel(true);
418	>	awaitTermination(t1, MEDIUM_DELAY_MS);
419	>	awaitTermination(t2, MEDIUM_DELAY_MS);
420	>	checkCancelled(task);
421	>	}
422	>
423	>
424	>	/**
425	>	* A runtime exception in task causes get to throw ExecutionException
426	>	*/
427	>	public void testGet_ExecutionException() throws InterruptedException {
428	>	final FutureTask task = new FutureTask(new Callable() {
429	>	public Object call() {
430	>	return 5/0;
431	>	}});
432	>
433	>	task.run();
434		try {
435	<	t.start();
436	<	Thread.sleep(SHORT_DELAY_MS);
437	<	t.interrupt();
438	<	t.join();
439	<	} catch(Exception e){
385	<	fail("unexpected exception");
435	>	task.get();
436	>	shouldThrow();
437	>	} catch (ExecutionException success) {
438	>	assertTrue(success.getCause() instanceof ArithmeticException);
439	>	checkCompletedAbnormally(task, success.getCause());
440		}
441		}
442
443	<	public void testTimedGet_InterruptedException2(){
444	<	final FutureTask ft = new FutureTask(new NoOpCallable());
445	<	Thread t = new Thread(new Runnable(){
446	<	public void run(){
447	<	try{
448	<	ft.get(LONG_DELAY_MS,TimeUnit.MILLISECONDS);
449	<	threadFail("should throw");
450	<	} catch(InterruptedException success){}
451	<	catch(Exception e){
452	<	threadFail("unexpected exception");
453	<	}
454	<	}
455	<	});
456	<	try {
457	<	t.start();
458	<	Thread.sleep(SHORT_DELAY_MS);
405	<	t.interrupt();
406	<	t.join();
407	<	} catch(Exception e){
408	<	fail("unexpected exception");
443	>	/**
444	>	* A runtime exception in task causes timed get to throw ExecutionException
445	>	*/
446	>	public void testTimedGet_ExecutionException2() throws Exception {
447	>	final FutureTask task = new FutureTask(new Callable() {
448	>	public Object call() {
449	>	return 5/0;
450	>	}});
451	>
452	>	task.run();
453	>	try {
454	>	task.get(SHORT_DELAY_MS, MILLISECONDS);
455	>	shouldThrow();
456	>	} catch (ExecutionException success) {
457	>	assertTrue(success.getCause() instanceof ArithmeticException);
458	>	checkCompletedAbnormally(task, success.getCause());
459		}
460		}
461	<
462	<	public void testGet_TimeoutException(){
463	<	try{
464	<	FutureTask ft = new FutureTask(new NoOpCallable());
465	<	ft.get(1,TimeUnit.MILLISECONDS);
466	<	fail("should throw");
467	<	} catch(TimeoutException success){}
468	<	catch(Exception success){
469	<	fail("unexpected exception");
470	<	}
461	>
462	>
463	>	/**
464	>	* Interrupting a waiting get causes it to throw InterruptedException
465	>	*/
466	>	public void testGet_InterruptedException() throws InterruptedException {
467	>	final CountDownLatch threadStarted = new CountDownLatch(1);
468	>	final FutureTask task = new FutureTask(new NoOpCallable());
469	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
470	>	public void realRun() throws Exception {
471	>	threadStarted.countDown();
472	>	task.get();
473	>	}});
474	>
475	>	threadStarted.await();
476	>	t.interrupt();
477	>	awaitTermination(t, MEDIUM_DELAY_MS);
478	>	checkNotDone(task);
479		}
480	<
480	>
481	>	/**
482	>	* Interrupting a waiting timed get causes it to throw InterruptedException
483	>	*/
484	>	public void testTimedGet_InterruptedException2() throws InterruptedException {
485	>	final CountDownLatch threadStarted = new CountDownLatch(1);
486	>	final FutureTask task = new FutureTask(new NoOpCallable());
487	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
488	>	public void realRun() throws Exception {
489	>	threadStarted.countDown();
490	>	task.get(LONG_DELAY_MS, MILLISECONDS);
491	>	}});
492	>
493	>	threadStarted.await();
494	>	t.interrupt();
495	>	awaitTermination(t, MEDIUM_DELAY_MS);
496	>	checkNotDone(task);
497	>	}
498	>
499	>	/**
500	>	* A timed out timed get throws TimeoutException
501	>	*/
502	>	public void testGet_TimeoutException() throws Exception {
503	>	try {
504	>	FutureTask task = new FutureTask(new NoOpCallable());
505	>	task.get(1, MILLISECONDS);
506	>	shouldThrow();
507	>	} catch (TimeoutException success) {}
508	>	}
509	>
510		}

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