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

Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.5 by dl, Sat Sep 20 18:20:07 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		/**
103	<	*
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	<	}
41	<	catch(NullPointerException success) {
42	<	}
109	>	} catch (NullPointerException success) {}
110		}
111
112		/**
113	<	*
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	<	}
53	<	catch(NullPointerException success) {
54	<	}
119	>	} catch (NullPointerException success) {}
120		}
121
122		/**
123	<	*
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	<	assertFalse(task.isCancelled());
126	>	FutureTask task = new FutureTask(new NoOpCallable());
127	>	task.run();
128	>	assertTrue(task.isDone());
129	>	checkCompletedNormally(task, Boolean.TRUE);
130		}
131
132		/**
133	<	*
133	>	* runAndReset of a non-cancelled task succeeds
134		*/
135	<	public void testReset() {
136	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
137	<	task.run();
138	<	assertTrue(task.isDone());
74	<	assertTrue(task.reset());
135	>	public void testRunAndReset() {
136	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
137	>	assertTrue(task.runAndReset());
138	>	checkNotDone(task);
139		}
140
141		/**
142	<	*
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());
85	<	assertTrue(task.isCancelled());
86	<	assertFalse(task.reset());
147	>	assertFalse(task.runAndReset());
148	>	checkCancelled(task);
149		}
150
89	–	/**
90	–	*
91	–	*/
92	–	public void testSetDone() {
93	–	MyFutureTask task = new MyFutureTask(new NoOpCallable());
94	–	task.setDone();
95	–	assertTrue(task.isDone());
96	–	assertFalse(task.isCancelled());
97	–	}
151
152		/**
153	<	*
153	>	* setting value causes get to return it
154		*/
155	<	public void testSetCancelled() {
156	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
104	<	assertTrue(task.cancel(false));
105	<	task.setCancelled();
106	<	assertTrue(task.isDone());
107	<	assertTrue(task.isCancelled());
108	<	}
109	<
110	<	/**
111	<	*
112	<	*/
113	<	public void testSet() {
114	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
155	>	public void testSet() throws Exception {
156	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
157		task.set(one);
158	<	try {
159	<	assertEquals(task.get(), one);
118	<	}
119	<	catch(Exception e) {
120	<	unexpectedException();
121	<	}
158	>	assertSame(task.get(), one);
159	>	checkCompletedNormally(task, one);
160		}
161
162		/**
163	<	*
163	>	* setException causes get to throw ExecutionException
164		*/
165	<	public void testSetException() {
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		shouldThrow();
172	<	}
173	<	catch(ExecutionException ee) {
174	<	Throwable cause = ee.getCause();
137	<	assertEquals(cause, nse);
138	<	}
139	<	catch(Exception e) {
140	<	unexpectedException();
172	>	} catch (ExecutionException success) {
173	>	assertSame(success.getCause(), nse);
174	>	checkCompletedAbnormally(task, nse);
175		}
176		}
177
178		/**
179	<	*
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());
152	<	assertTrue(task.isCancelled());
184	>	task.run();
185	>	checkCancelled(task);
186		}
187
188		/**
189	<	*
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());
163	<	assertTrue(task.isCancelled());
194	>	task.run();
195	>	checkCancelled(task);
196		}
197
198		/**
199	<	*
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());
174	<	assertFalse(task.isCancelled());
205	>	checkCompletedNormally(task, Boolean.TRUE);
206		}
207
208		/**
209	<	*
209	>	* cancel(true) interrupts a running task
210		*/
211	<	public void testCancelInterrupt() {
212	<	FutureTask task = new FutureTask( new Callable() {
213	<	public Object call() {
214	<	try {
215	<	Thread.sleep(MEDIUM_DELAY_MS);
216	<	threadShouldThrow();
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());
198	<	assertTrue(task.isCancelled());
199	<	} catch(InterruptedException e){
200	<	unexpectedException();
201	<	}
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	+	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	<	*
286	>	* set in one thread causes get in another thread to retrieve value
287		*/
288	<	public void testCancelNoInterrupt() {
289	<	FutureTask task = new FutureTask( new Callable() {
290	<	public Object call() {
291	<	try {
292	<	Thread.sleep(MEDIUM_DELAY_MS);
293	<	}
214	<	catch (InterruptedException success) {
215	<	threadFail("should not interrupt");
216	<	}
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	<	Thread t = new  Thread(task);
297	<	t.start();
298	<
299	<	try {
300	<	Thread.sleep(SHORT_DELAY_MS);
301	<	assertTrue(task.cancel(false));
302	<	t.join();
303	<	assertTrue(task.isDone());
304	<	assertTrue(task.isCancelled());
305	<	} catch(InterruptedException e){
306	<	unexpectedException();
307	<	}
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	<	*
312	>	* run in one thread causes timed get in another thread to retrieve value
313		*/
314	<	public void testGet1() {
315	<	final FutureTask ft = new FutureTask(new Callable() {
316	<	public Object call() {
317	<	try {
318	<	Thread.sleep(MEDIUM_DELAY_MS);
319	<	} catch(InterruptedException e){
242	<	threadUnexpectedException();
243	<	}
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	<	threadUnexpectedException();
329	<	}
330	<	}
331	<	});
332	<	try {
333	<	assertFalse(ft.isDone());
334	<	assertFalse(ft.isCancelled());
335	<	t.start();
260	<	Thread.sleep(SHORT_DELAY_MS);
261	<	ft.run();
262	<	t.join();
263	<	assertTrue(ft.isDone());
264	<	assertFalse(ft.isCancelled());
265	<	} catch(InterruptedException e){
266	<	unexpectedException();
267	<
268	<	}
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	<	*
340	<	*/
341	<	public void testTimedGet1() {
342	<	final FutureTask ft = new FutureTask(new Callable() {
343	<	public Object call() {
344	<	try {
345	<	Thread.sleep(MEDIUM_DELAY_MS);
346	<	} catch(InterruptedException e){
280	<	threadUnexpectedException();
281	<	}
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	<	}
349	<	});
350	<	Thread t = new Thread(new Runnable() {
351	<	public void run() {
352	<	try {
353	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
354	<	} catch(TimeoutException success) {
355	<	} catch(Exception e){
356	<	threadUnexpectedException();
357	<	}
358	<	}
359	<	});
360	<	try {
361	<	assertFalse(ft.isDone());
362	<	assertFalse(ft.isCancelled());
298	<	t.start();
299	<	ft.run();
300	<	t.join();
301	<	assertTrue(ft.isDone());
302	<	assertFalse(ft.isCancelled());
303	<	} catch(InterruptedException e){
304	<	unexpectedException();
305	<
306	<	}
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	+	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	<	*
396	<	*/
397	<	public void testGet_Cancellation() {
398	<	final FutureTask ft = new FutureTask(new Callable() {
399	<	public Object call() {
400	<	try {
401	<	Thread.sleep(MEDIUM_DELAY_MS);
402	<	} catch(InterruptedException e){
403	<	threadUnexpectedException();
404	<	}
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	<	threadShouldThrow();
415	<	} catch(CancellationException success){
416	<	}
417	<	catch(Exception e){
418	<	threadUnexpectedException();
419	<	}
420	<	}
337	<	});
338	<	t.start();
339	<	ft.cancel(true);
340	<	t.join();
341	<	} catch(InterruptedException success){
342	<	unexpectedException();
343	<	}
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	<
422	>
423	>
424		/**
425	<	*
426	<	*/
427	<	public void testGet_Cancellation2() {
428	<	final FutureTask ft = new FutureTask(new Callable() {
429	<	public Object call() {
430	<	try {
431	<	Thread.sleep(SHORT_DELAY_MS);
432	<	} catch(InterruptedException e) {
433	<	threadUnexpectedException();
434	<	}
435	<	return Boolean.TRUE;
436	<	}
437	<	});
438	<	try {
439	<	Thread.sleep(SHORT_DELAY_MS);
362	<	Thread t = new Thread(new Runnable() {
363	<	public void run() {
364	<	try {
365	<	ft.get(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
366	<	threadShouldThrow();
367	<	} catch(CancellationException success) {}
368	<	catch(Exception e){
369	<	threadUnexpectedException();
370	<	}
371	<	}
372	<	});
373	<	t.start();
374	<	Thread.sleep(SHORT_DELAY_MS);
375	<	ft.cancel(true);
376	<	Thread.sleep(SHORT_DELAY_MS);
377	<	t.join();
378	<	} catch(InterruptedException ie){
379	<	unexpectedException();
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	>	task.get();
436	>	shouldThrow();
437	>	} catch (ExecutionException success) {
438	>	assertTrue(success.getCause() instanceof ArithmeticException);
439	>	checkCompletedAbnormally(task, success.getCause());
440		}
441		}
442
443		/**
444	<	*
444	>	* A runtime exception in task causes timed get to throw ExecutionException
445		*/
446	<	public void testGet_ExecutionException() {
447	<	final FutureTask ft = new FutureTask(new Callable() {
448	<	public Object call() {
449	<	int i = 5/0;
450	<	return Boolean.TRUE;
451	<	}
452	<	});
393	<	try {
394	<	ft.run();
395	<	ft.get();
396	<	shouldThrow();
397	<	} catch(ExecutionException success){
398	<	}
399	<	catch(Exception e){
400	<	unexpectedException();
401	<	}
402	<	}
403	<
404	<	/**
405	<	*
406	<	*/
407	<	public void testTimedGet_ExecutionException2() {
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(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
417	<	shouldThrow();
418	<	} catch(ExecutionException success) {
419	<	} catch(TimeoutException success) { } // unlikely but OK
420	<	catch(Exception e){
421	<	unexpectedException();
422	<	}
423	<	}
424	<
425	<
426	<	/**
427	<	*
428	<	*/
429	<	public void testGet_InterruptedException() {
430	<	final FutureTask ft = new FutureTask(new NoOpCallable());
431	<	Thread t = new Thread(new Runnable() {
432	<	public void run() {
433	<	try {
434	<	ft.get();
435	<	threadShouldThrow();
436	<	} catch(InterruptedException success){
437	<	} catch(Exception e){
438	<	threadUnexpectedException();
439	<	}
440	<	}
441	<	});
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	<	t.start();
455	<	Thread.sleep(SHORT_DELAY_MS);
456	<	t.interrupt();
457	<	t.join();
458	<	} catch(Exception e){
448	<	unexpectedException();
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	+
463		/**
464	<	*
464	>	* Interrupting a waiting get causes it to throw InterruptedException
465		*/
466	<	public void testTimedGet_InterruptedException2() {
467	<	final FutureTask ft = new FutureTask(new NoOpCallable());
468	<	Thread t = new Thread(new Runnable() {
469	<	public void run() {
470	<	try {
471	<	ft.get(LONG_DELAY_MS,TimeUnit.MILLISECONDS);
472	<	threadShouldThrow();
473	<	} catch(InterruptedException success){}
474	<	catch(Exception e){
475	<	threadUnexpectedException();
476	<	}
477	<	}
478	<	});
468	<	try {
469	<	t.start();
470	<	Thread.sleep(SHORT_DELAY_MS);
471	<	t.interrupt();
472	<	t.join();
473	<	} catch(Exception e){
474	<	unexpectedException();
475	<	}
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	<	*
482	>	* Interrupting a waiting timed get causes it to throw InterruptedException
483		*/
484	<	public void testGet_TimeoutException() {
485	<	try {
486	<	FutureTask ft = new FutureTask(new NoOpCallable());
487	<	ft.get(1,TimeUnit.MILLISECONDS);
488	<	shouldThrow();
489	<	} catch(TimeoutException success){}
490	<	catch(Exception success){
491	<	unexpectedException();
492	<	}
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	<
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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