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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 20:39:11 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 TestCase {
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	<	private static long SHORT_DELAY_MS = 100;
31	<	private static long MEDIUM_DELAY_MS = 1000;
32	<	private static long LONG_DELAY_MS = 10000;
23	<
24	<	public void testIsDone(){
25	<	FutureTask task = new FutureTask( new Callable() {
26	<	public Object call() { return Boolean.TRUE; } });
27	<	task.run();
28	<	assertTrue(task.isDone());
29	<	assertFalse(task.isCancelled());
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 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	+	/**
103	+	* Creating a future with a null callable throws NPE
104	+	*/
105	+	public void testConstructor() {
106	+	try {
107	+	FutureTask task = new FutureTask(null);
108	+	shouldThrow();
109	+	} catch (NullPointerException success) {}
110	+	}
111	+
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	+	shouldThrow();
119	+	} catch (NullPointerException success) {}
120	+	}
121	+
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	+	/**
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	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
146	+	assertTrue(task.cancel(false));
147	+	assertFalse(task.runAndReset());
148	+	checkCancelled(task);
149	+	}
150	+
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	+	assertSame(task.get(), one);
158	+	checkCompletedNormally(task, one);
159	+	}
160	+
161	+	/**
162	+	* setException causes get to throw ExecutionException
163	+	*/
164	+	public void testSetException() throws Exception {
165	+	Exception nse = new NoSuchElementException();
166	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
167	+	task.setException(nse);
168	+	try {
169	+	Object x = task.get();
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 Callable() {
34	<	public Object call() { return Boolean.TRUE; } });
181	>	FutureTask task = new FutureTask(new NoOpCallable());
182		assertTrue(task.cancel(false));
183	<	task.run();
184	<	assertTrue(task.isDone());
38	<	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 Callable() {
43	<	public Object call() { return Boolean.TRUE; } });
191	>	FutureTask task = new FutureTask(new NoOpCallable());
192		assertTrue(task.cancel(true));
193	<	task.run();
194	<	assertTrue(task.isDone());
47	<	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 Callable() {
202	<	public Object call() { return Boolean.TRUE; } });
53	<	task.run();
201	>	FutureTask task = new FutureTask(new NoOpCallable());
202	>	task.run();
203		assertFalse(task.cancel(false));
204	<	assertTrue(task.isDone());
56	<	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(SHORT_DELAY_MS* 2);
212	<	fail("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());
77	<	assertTrue(task.isCancelled());
78	<	} catch(InterruptedException e){
79	<	fail("unexpected exception");
80	<	}
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	+	final FutureTask task =
265	+	new FutureTask(new CheckedCallable<Object>() {
266	+	public Object realCall() throws InterruptedException {
267	+	return Boolean.TRUE;
268	+	}});
269
270	<	public void testCancelNoInterrupt(){
271	<	FutureTask task = new FutureTask( new Callable() {
272	<	public Object call() {
273	<	try {
274	<	Thread.sleep(SHORT_DELAY_MS* 2);
275	<	}
276	<	catch (InterruptedException success) {
277	<	fail("should not interrupt");
278	<	}
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	>	/**
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	<	} });
95	<	Thread t = new  Thread(task);
96	<	t.start();
97	<
98	<	try{
99	<	Thread.sleep(SHORT_DELAY_MS);
100	<	assertTrue(task.cancel(false));
101	<	t.join();
102	<	assertTrue(task.isDone());
103	<	assertTrue(task.isCancelled());
104	<	} catch(InterruptedException e){
105	<	fail("unexpected exception");
106	<	}
107	<	}
294	>	}});
295
296	<	public void testGet1() {
297	<	final FutureTask ft = new FutureTask(new Callable(){
298	<	public Object call(){
299	<	try{
300	<	Thread.sleep(MEDIUM_DELAY_MS);
301	<	} catch(InterruptedException e){
302	<	fail("unexpected exception");
303	<	}
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();
326	<	} catch(Exception e){
327	<	fail("unexpected exception");
328	<	}
329	<	}
330	<	});
331	<	try{
332	<	assertFalse(ft.isDone());
333	<	assertFalse(ft.isCancelled());
334	<	t.start();
335	<	Thread.sleep(SHORT_DELAY_MS);
336	<	ft.run();
337	<	t.join();
338	<	assertTrue(ft.isDone());
339	<	assertFalse(ft.isCancelled());
340	<	} catch(InterruptedException e){
341	<	fail("unexpected exception");
342	<
343	<	}
344	<	}
345	<
144	<	public void testTimedGet1() {
145	<	final FutureTask ft = new FutureTask(new Callable(){
146	<	public Object call(){
147	<	try{
148	<	Thread.sleep(MEDIUM_DELAY_MS);
149	<	} catch(InterruptedException e){
150	<	fail("unexpected exception");
151	<	}
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	>	final PublicFutureTask task =
344	>	new PublicFutureTask(new CheckedCallable<Object>() {
345	>	public Object realCall() throws InterruptedException {
346		return Boolean.TRUE;
347	<	}
154	<	});
155	<	Thread t = new Thread(new Runnable(){
156	<	public void run(){
157	<	try{
158	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
159	<	} catch(TimeoutException success) {
160	<	} catch(Exception e){
161	<	fail("unexpected exception");
162	<	}
163	<	}
164	<	});
165	<	try{
166	<	assertFalse(ft.isDone());
167	<	assertFalse(ft.isCancelled());
168	<	t.start();
169	<	ft.run();
170	<	t.join();
171	<	assertTrue(ft.isDone());
172	<	assertFalse(ft.isCancelled());
173	<	} catch(InterruptedException e){
174	<	fail("unexpected exception");
175	<
176	<	}
177	<	}
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	+	/**
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	<	public void testGet_Cancellation(){
379	<	final FutureTask ft = new FutureTask(new Callable(){
380	<	public Object call(){
381	<	try{
382	<	Thread.sleep(MEDIUM_DELAY_MS);
383	<	} catch(InterruptedException e){
384	<	fail("unexpected exception");
385	<	}
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	>	/**
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	<	}
190	<	});
191	<	try {
192	<	Thread.sleep(SHORT_DELAY_MS);
193	<	Thread t = new Thread(new Runnable(){
194	<	public void run(){
195	<	try{
196	<	ft.get();
197	<	fail("should throw");
198	<	} catch(CancellationException success){
199	<	}
200	<	catch(Exception e){
201	<	fail("unexpected exception");
202	<	}
203	<	}
204	<	});
205	<	t.start();
206	<	ft.cancel(true);
207	<	t.join();
208	<	} catch(InterruptedException success){
209	<	fail("unexpected exception");
210	<	}
211	<	}
212	<
213	<	public void testGet_Cancellation2(){
214	<	final FutureTask ft = new FutureTask(new Callable(){
215	<	public Object call(){
216	<	try{
217	<	Thread.sleep(SHORT_DELAY_MS);
218	<	} catch(InterruptedException e) {
219	<	fail("unexpected exception");
220	<	}
221	<	return Boolean.TRUE;
222	<	}
223	<	});
224	<	try{
225	<	Thread.sleep(100);
226	<	Thread t = new Thread(new Runnable(){
227	<	public void run(){
228	<	try{
229	<	ft.get(3 * SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
230	<	fail("should throw");
231	<	} catch(CancellationException success) {}
232	<	catch(Exception e){
233	<	fail("unexpected exception");
234	<	}
235	<	}
236	<	});
237	<	t.start();
238	<	Thread.sleep(SHORT_DELAY_MS);
239	<	ft.cancel(true);
240	<	Thread.sleep(SHORT_DELAY_MS);
241	<	t.join();
242	<	} catch(InterruptedException ie){
243	<	fail("unexpected exception");
244	<	}
245	<	}
405	>	}});
406
407	<	public void testGet_ExecutionException(){
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();
417	<	fail("should throw");
418	<	} catch(ExecutionException success){
419	<	}
420	<	catch(Exception e){
421	<	fail("unexpected exception");
422	<	}
423	<	}
424	<
425	<	public void testTimedGet_ExecutionException2(){
426	<	final FutureTask ft = new FutureTask(new Callable(){
427	<	public Object call(){
428	<	int i = 5/0;
429	<	return Boolean.TRUE;
430	<	}
431	<	});
272	<	try{
273	<	ft.run();
274	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
275	<	fail("should throw");
276	<	} catch(ExecutionException success) {
277	<	} catch(TimeoutException success) { } // unlikely but OK
278	<	catch(Exception e){
279	<	fail("unexpected exception");
280	<	}
281	<	}
282	<
283	<
284	<	public void testGet_InterruptedException(){
285	<	final FutureTask ft = new FutureTask(new Callable(){
286	<	public Object call(){
287	<	return new Object();
288	<	}
289	<	});
290	<	Thread t = new Thread(new Runnable(){
291	<	public void run(){
292	<	try{
293	<	ft.get();
294	<	fail("should throw");
295	<	} catch(InterruptedException success){
296	<	} catch(Exception e){
297	<	fail("unexpected exception");
298	<	}
299	<	}
300	<	});
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){
307	<	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 Callable(){
443	<	public Object call(){
444	<	return new Object();
445	<	}
446	<	});
447	<	Thread t = new Thread(new Runnable(){
448	<	public void run(){
449	<	try{
450	<	ft.get(100,TimeUnit.SECONDS);
451	<	fail("should throw");
452	<	} catch(InterruptedException success){}
453	<	catch(Exception e){
454	<	fail("unexpected exception");
455	<	}
456	<	}
327	<	});
328	<	try {
329	<	t.start();
330	<	Thread.sleep(SHORT_DELAY_MS);
331	<	t.interrupt();
332	<	t.join();
333	<	} catch(Exception e){
334	<	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	<	FutureTask ft = new FutureTask(new Callable(){
462	<	public Object call(){
463	<	return new Object();
464	<	}
465	<	});
466	<	try{
467	<	ft.get(1,TimeUnit.MILLISECONDS);
468	<	fail("should throw");
469	<	} catch(TimeoutException success){}
470	<	catch(Exception success){
471	<	fail("unexpected exception");
472	<	}
473	<
474	<
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	>
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	<
506	>
507		}

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