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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:55 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 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	+	/**
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	+	assertSame(task.get(), one);
159	+	checkCompletedNormally(task, one);
160	+	}
161	+
162	+	/**
163	+	* setException causes get to throw ExecutionException
164	+	*/
165	+	public void testSetException() throws Exception {
166	+	Exception nse = new NoSuchElementException();
167	+	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
168	+	task.setException(nse);
169	+	try {
170	+	Object x = task.get();
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 Callable() {
34	<	public Object call() { return Boolean.TRUE; } });
182	>	FutureTask task = new FutureTask(new NoOpCallable());
183		assertTrue(task.cancel(false));
184	<	task.run();
185	<	assertTrue(task.isDone());
38	<	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 Callable() {
43	<	public Object call() { return Boolean.TRUE; } });
192	>	FutureTask task = new FutureTask(new NoOpCallable());
193		assertTrue(task.cancel(true));
194	<	task.run();
195	<	assertTrue(task.isDone());
47	<	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 Callable() {
203	<	public Object call() { return Boolean.TRUE; } });
53	<	task.run();
202	>	FutureTask task = new FutureTask(new NoOpCallable());
203	>	task.run();
204		assertFalse(task.cancel(false));
205	<	assertTrue(task.isDone());
56	<	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(SHORT_DELAY_MS* 2);
213	<	fail("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());
77	<	assertTrue(task.isCancelled());
78	<	} catch(InterruptedException e){
79	<	fail("unexpected exception");
80	<	}
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	+	final FutureTask task =
266	+	new FutureTask(new CheckedCallable<Object>() {
267	+	public Object realCall() throws InterruptedException {
268	+	return Boolean.TRUE;
269	+	}});
270
271	<	public void testCancelNoInterrupt(){
272	<	FutureTask task = new FutureTask( new Callable() {
273	<	public Object call() {
274	<	try {
275	<	Thread.sleep(SHORT_DELAY_MS* 2);
276	<	}
277	<	catch (InterruptedException success) {
278	<	fail("should not interrupt");
279	<	}
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	>	/**
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	<	} });
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	<	}
295	>	}});
296
297	<	public void testGet1() {
298	<	final FutureTask ft = new FutureTask(new Callable(){
299	<	public Object call(){
300	<	try{
301	<	Thread.sleep(MEDIUM_DELAY_MS);
302	<	}catch(InterruptedException e){
303	<	fail("unexpected exception");
304	<	}
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();
327	<	}catch(Exception e){
328	<	fail("unexpected exception");
329	<	}
330	<	}
331	<	});
332	<	try{
333	<	assertFalse(ft.isDone());
334	<	assertFalse(ft.isCancelled());
335	<	t.start();
336	<	Thread.sleep(SHORT_DELAY_MS);
337	<	ft.run();
338	<	t.join();
339	<	assertTrue(ft.isDone());
340	<	assertFalse(ft.isCancelled());
341	<	} catch(InterruptedException e){
342	<	fail("unexpected exception");
343	<
344	<	}
345	<	}
346	<
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	<	}
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	>	final PublicFutureTask task =
345	>	new PublicFutureTask(new CheckedCallable<Object>() {
346	>	public Object realCall() throws InterruptedException {
347		return Boolean.TRUE;
348	<	}
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	<	}
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	+	/**
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	<	public void testGet_Cancellation(){
380	<	final FutureTask ft = new FutureTask(new Callable(){
381	<	public Object call(){
382	<	try{
383	<	Thread.sleep(MEDIUM_DELAY_MS);
384	<	}catch(InterruptedException e){
385	<	fail("unexpected exception");
386	<	}
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	>	/**
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	<	try {
409	<	Thread.sleep(SHORT_DELAY_MS);
410	<	Thread t = new Thread(new Runnable(){
411	<	public void run(){
412	<	try{
413	<	ft.get();
414	<	fail("should throw");
415	<	}catch(CancellationException success){
416	<	}
417	<	catch(Exception e){
418	<	fail("unexpected exception");
419	<	}
420	<	}
204	<	});
205	<	t.start();
206	<	ft.cancel(true);
207	<	t.join();
208	<	}catch(InterruptedException sucess){
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	<	}
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	<	public void testGet_ExecutionException(){
424	<	final FutureTask ft = new FutureTask(new Callable(){
425	<	public Object call(){
426	<	int i = 5/0;
427	<	return Boolean.TRUE;
428	<	}
429	<	});
430	<	try{
431	<	ft.run();
432	<	ft.get();
433	<	fail("should throw");
258	<	}catch(ExecutionException success){
259	<	}
260	<	catch(Exception e){
261	<	fail("unexpected exception");
262	<	}
263	<	}
264	<
265	<	public void testTimedGet_ExecutionException2(){
266	<	final FutureTask ft = new FutureTask(new Callable(){
267	<	public Object call(){
268	<	int i = 5/0;
269	<	return Boolean.TRUE;
270	<	}
271	<	});
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	<	});
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){
307	<	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 Callable(){
445	<	public Object call(){
446	<	return new Object();
447	<	}
448	<	});
449	<	Thread t = new Thread(new Runnable(){
450	<	public void run(){
451	<	try{
452	<	ft.get(100,TimeUnit.SECONDS);
453	<	fail("should throw");
454	<	}catch(InterruptedException success){}
455	<	catch(Exception e){
456	<	fail("unexpected exception");
457	<	}
458	<	}
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");
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	<	FutureTask ft = new FutureTask(new Callable(){
464	<	public Object call(){
465	<	return new Object();
466	<	}
467	<	});
468	<	try{
469	<	ft.get(1,TimeUnit.MILLISECONDS);
470	<	fail("should throw");
471	<	}catch(TimeoutException success){}
472	<	catch(Exception sucess){
473	<	fail("unexpected exception");
474	<	}
475	<
476	<
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	>
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	<
509	>
510		}

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