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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 1.33 by jsr166, Thu Dec 20 04:58:53 2012 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.security.Permission;
11	>	import java.util.concurrent.Callable;
12	>	import java.util.concurrent.CancellationException;
13	>	import java.util.concurrent.CountDownLatch;
14	>	import java.util.concurrent.ExecutionException;
15	>	import java.util.concurrent.Future;
16	>	import java.util.concurrent.FutureTask;
17	>	import java.util.concurrent.TimeoutException;
18	>	import java.util.concurrent.atomic.AtomicInteger;
19	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
20	>	import static java.util.concurrent.TimeUnit.SECONDS;
21		import java.util.*;
22
23		public class FutureTaskTest extends JSR166TestCase {
24
25		public static void main(String[] args) {
26	<	junit.textui.TestRunner.run (suite());
26	>	junit.textui.TestRunner.run(suite());
27		}
28		public static Test suite() {
29	<	return new TestSuite(FutureTaskTest.class);
29	>	return new TestSuite(FutureTaskTest.class);
30		}
31
32	<	/**
33	<	* Subclass to expose protected methods
34	<	*/
35	<	static class MyFutureTask extends FutureTask {
36	<	public MyFutureTask(Callable r) { super(r); }
37	<	public boolean reset() { return super.reset(); }
38	<	public void setCancelled() { super.setCancelled(); }
39	<	public void setDone() { super.setDone(); }
40	<	public void set(Object x) { super.set(x); }
41	<	public void setException(Throwable t) { super.setException(t); }
32	>	void checkIsDone(Future<?> f) {
33	>	assertTrue(f.isDone());
34	>	assertFalse(f.cancel(false));
35	>	assertFalse(f.cancel(true));
36	>	if (f instanceof PublicFutureTask) {
37	>	PublicFutureTask pf = (PublicFutureTask) f;
38	>	assertEquals(1, pf.doneCount());
39	>	assertFalse(pf.runAndReset());
40	>	assertEquals(1, pf.doneCount());
41	>
42	>	// Check that run and runAndReset have no effect.
43	>	int savedRunCount = pf.runCount();
44	>	int savedSetCount = pf.setCount();
45	>	int savedSetExceptionCount = pf.setExceptionCount();
46	>	pf.run();
47	>	pf.runAndReset();
48	>	assertEquals(savedRunCount, pf.runCount());
49	>	assertEquals(savedSetCount, pf.setCount());
50	>	assertEquals(savedSetExceptionCount, pf.setExceptionCount());
51	>	assertTrue(f.isDone());
52	>	}
53		}
54
55	<	public void testConstructor(){
56	<	try {
57	<	FutureTask task = new FutureTask(null);
58	<	fail("should throw");
55	>	void checkNotDone(Future<?> f) {
56	>	assertFalse(f.isDone());
57	>	assertFalse(f.isCancelled());
58	>	if (f instanceof PublicFutureTask) {
59	>	PublicFutureTask pf = (PublicFutureTask) f;
60	>	assertEquals(0, pf.doneCount());
61	>	assertEquals(0, pf.setCount());
62	>	assertEquals(0, pf.setExceptionCount());
63		}
64	<	catch(NullPointerException success) {
64	>	}
65	>
66	>	void checkIsRunning(Future<?> f) {
67	>	checkNotDone(f);
68	>	if (f instanceof FutureTask) {
69	>	FutureTask ft = (FutureTask<?>) f;
70	>	// Check that run methods do nothing
71	>	ft.run();
72	>	if (f instanceof PublicFutureTask)
73	>	assertFalse(((PublicFutureTask) f).runAndReset());
74	>	checkNotDone(f);
75		}
76		}
77
78	<	public void testConstructor2(){
78	>	<T> void checkCompletedNormally(Future<T> f, T expected) {
79	>	checkIsDone(f);
80	>	assertFalse(f.isCancelled());
81	>
82		try {
83	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
84	<	fail("should throw");
85	<	}
86	<	catch(NullPointerException success) {
87	<	}
83	>	assertSame(expected, f.get());
84	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
85	>	try {
86	>	assertSame(expected, f.get(5L, SECONDS));
87	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
88		}
89
90	<	public void testIsDone(){
91	<	FutureTask task = new FutureTask( new NoOpCallable());
92	<	task.run();
93	<	assertTrue(task.isDone());
94	<	assertFalse(task.isCancelled());
90	>	void checkCancelled(Future<?> f) {
91	>	checkIsDone(f);
92	>	assertTrue(f.isCancelled());
93	>
94	>	try {
95	>	f.get();
96	>	shouldThrow();
97	>	} catch (CancellationException success) {
98	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
99	>
100	>	try {
101	>	f.get(5L, SECONDS);
102	>	shouldThrow();
103	>	} catch (CancellationException success) {
104	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
105		}
106
107	<	public void testReset(){
108	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
109	<	task.run();
110	<	assertTrue(task.isDone());
111	<	assertTrue(task.reset());
107	>	void tryToConfuseDoneTask(PublicFutureTask pf) {
108	>	pf.set(new Object());
109	>	pf.setException(new Error());
110	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
111	>	pf.cancel(true);
112	>	}
113		}
114
115	<	public void testResetAfterCancel() {
116	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
117	<	assertTrue(task.cancel(false));
118	<	task.run();
119	<	assertTrue(task.isDone());
120	<	assertTrue(task.isCancelled());
121	<	assertFalse(task.reset());
115	>	void checkCompletedAbnormally(Future<?> f, Throwable t) {
116	>	checkIsDone(f);
117	>	assertFalse(f.isCancelled());
118	>
119	>	try {
120	>	f.get();
121	>	shouldThrow();
122	>	} catch (ExecutionException success) {
123	>	assertSame(t, success.getCause());
124	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
125	>
126	>	try {
127	>	f.get(5L, SECONDS);
128	>	shouldThrow();
129	>	} catch (ExecutionException success) {
130	>	assertSame(t, success.getCause());
131	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
132		}
133
134	<	public void testSetDone() {
135	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
136	<	task.setDone();
137	<	assertTrue(task.isDone());
138	<	assertFalse(task.isCancelled());
134	>	/**
135	>	* Subclass to expose protected methods
136	>	*/
137	>	static class PublicFutureTask extends FutureTask {
138	>	private final AtomicInteger runCount;
139	>	private final AtomicInteger doneCount = new AtomicInteger(0);
140	>	private final AtomicInteger runAndResetCount = new AtomicInteger(0);
141	>	private final AtomicInteger setCount = new AtomicInteger(0);
142	>	private final AtomicInteger setExceptionCount = new AtomicInteger(0);
143	>	public int runCount() { return runCount.get(); }
144	>	public int doneCount() { return doneCount.get(); }
145	>	public int runAndResetCount() { return runAndResetCount.get(); }
146	>	public int setCount() { return setCount.get(); }
147	>	public int setExceptionCount() { return setExceptionCount.get(); }
148	>
149	>	PublicFutureTask(Runnable runnable) {
150	>	this(runnable, seven);
151	>	}
152	>	PublicFutureTask(Runnable runnable, Object result) {
153	>	this(runnable, result, new AtomicInteger(0));
154	>	}
155	>	private PublicFutureTask(final Runnable runnable, Object result,
156	>	final AtomicInteger runCount) {
157	>	super(new Runnable() {
158	>	public void run() {
159	>	runCount.getAndIncrement();
160	>	runnable.run();
161	>	}}, result);
162	>	this.runCount = runCount;
163	>	}
164	>	PublicFutureTask(Callable callable) {
165	>	this(callable, new AtomicInteger(0));
166	>	}
167	>	private PublicFutureTask(final Callable callable,
168	>	final AtomicInteger runCount) {
169	>	super(new Callable() {
170	>	public Object call() throws Exception {
171	>	runCount.getAndIncrement();
172	>	return callable.call();
173	>	}});
174	>	this.runCount = runCount;
175	>	}
176	>	@Override public void done() {
177	>	assertTrue(isDone());
178	>	doneCount.incrementAndGet();
179	>	super.done();
180	>	}
181	>	@Override public boolean runAndReset() {
182	>	runAndResetCount.incrementAndGet();
183	>	return super.runAndReset();
184	>	}
185	>	@Override public void set(Object x) {
186	>	setCount.incrementAndGet();
187	>	super.set(x);
188	>	}
189	>	@Override public void setException(Throwable t) {
190	>	setExceptionCount.incrementAndGet();
191	>	super.setException(t);
192	>	}
193		}
194
195	<	public void testSetCancelled() {
196	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
197	<	assertTrue(task.cancel(false));
198	<	task.setCancelled();
199	<	assertTrue(task.isDone());
200	<	assertTrue(task.isCancelled());
195	>	class Counter extends CheckedRunnable {
196	>	final AtomicInteger count = new AtomicInteger(0);
197	>	public int get() { return count.get(); }
198	>	public void realRun() {
199	>	count.getAndIncrement();
200	>	}
201		}
202
203	<	public void testSet() {
204	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
205	<	task.set(one);
203	>	/**
204	>	* creating a future with a null callable throws NullPointerException
205	>	*/
206	>	public void testConstructor() {
207		try {
208	<	assertEquals(task.get(), one);
208	>	new FutureTask(null);
209	>	shouldThrow();
210	>	} catch (NullPointerException success) {}
211	>	}
212	>
213	>	/**
214	>	* creating a future with null runnable throws NullPointerException
215	>	*/
216	>	public void testConstructor2() {
217	>	try {
218	>	new FutureTask(null, Boolean.TRUE);
219	>	shouldThrow();
220	>	} catch (NullPointerException success) {}
221	>	}
222	>
223	>	/**
224	>	* isDone is true when a task completes
225	>	*/
226	>	public void testIsDone() {
227	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
228	>	assertFalse(task.isDone());
229	>	task.run();
230	>	assertTrue(task.isDone());
231	>	checkCompletedNormally(task, Boolean.TRUE);
232	>	assertEquals(1, task.runCount());
233	>	}
234	>
235	>	/**
236	>	* runAndReset of a non-cancelled task succeeds
237	>	*/
238	>	public void testRunAndReset() {
239	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
240	>	for (int i = 0; i < 3; i++) {
241	>	assertTrue(task.runAndReset());
242	>	checkNotDone(task);
243	>	assertEquals(i+1, task.runCount());
244	>	assertEquals(i+1, task.runAndResetCount());
245	>	assertEquals(0, task.setCount());
246	>	assertEquals(0, task.setExceptionCount());
247		}
248	<	catch(Exception e) {
249	<	fail("unexpected exception");
248	>	}
249	>
250	>	/**
251	>	* runAndReset after cancellation fails
252	>	*/
253	>	public void testRunAndResetAfterCancel() {
254	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
255	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
256	>	assertTrue(task.cancel(mayInterruptIfRunning));
257	>	for (int i = 0; i < 3; i++) {
258	>	assertFalse(task.runAndReset());
259	>	assertEquals(0, task.runCount());
260	>	assertEquals(i+1, task.runAndResetCount());
261	>	assertEquals(0, task.setCount());
262	>	assertEquals(0, task.setExceptionCount());
263	>	}
264	>	tryToConfuseDoneTask(task);
265	>	checkCancelled(task);
266		}
267		}
268
269	<	public void testSetException() {
269	>	/**
270	>	* setting value causes get to return it
271	>	*/
272	>	public void testSet() throws Exception {
273	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
274	>	task.set(one);
275	>	for (int i = 0; i < 3; i++) {
276	>	assertSame(one, task.get());
277	>	assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS));
278	>	assertEquals(1, task.setCount());
279	>	}
280	>	tryToConfuseDoneTask(task);
281	>	checkCompletedNormally(task, one);
282	>	assertEquals(0, task.runCount());
283	>	}
284	>
285	>	/**
286	>	* setException causes get to throw ExecutionException
287	>	*/
288	>	public void testSetException_get() throws Exception {
289		Exception nse = new NoSuchElementException();
290	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
290	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
291		task.setException(nse);
292	+
293		try {
294	<	Object x = task.get();
295	<	fail("should throw");
296	<	}
297	<	catch(ExecutionException ee) {
298	<	Throwable cause = ee.getCause();
110	<	assertEquals(cause, nse);
294	>	task.get();
295	>	shouldThrow();
296	>	} catch (ExecutionException success) {
297	>	assertSame(nse, success.getCause());
298	>	checkCompletedAbnormally(task, nse);
299		}
300	<	catch(Exception e) {
301	<	fail("unexpected exception");
300	>
301	>	try {
302	>	task.get(LONG_DELAY_MS, MILLISECONDS);
303	>	shouldThrow();
304	>	} catch (ExecutionException success) {
305	>	assertSame(nse, success.getCause());
306	>	checkCompletedAbnormally(task, nse);
307		}
308	+
309	+	assertEquals(1, task.setExceptionCount());
310	+	assertEquals(0, task.setCount());
311	+	tryToConfuseDoneTask(task);
312	+	checkCompletedAbnormally(task, nse);
313	+	assertEquals(0, task.runCount());
314		}
315
316	+	/**
317	+	* cancel(false) before run succeeds
318	+	*/
319		public void testCancelBeforeRun() {
320	<	FutureTask task = new FutureTask( new NoOpCallable());
320	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
321		assertTrue(task.cancel(false));
322	<	task.run();
323	<	assertTrue(task.isDone());
324	<	assertTrue(task.isCancelled());
322	>	task.run();
323	>	assertEquals(0, task.runCount());
324	>	assertEquals(0, task.setCount());
325	>	assertEquals(0, task.setExceptionCount());
326	>	assertTrue(task.isCancelled());
327	>	assertTrue(task.isDone());
328	>	tryToConfuseDoneTask(task);
329	>	assertEquals(0, task.runCount());
330	>	checkCancelled(task);
331		}
332
333	+	/**
334	+	* cancel(true) before run succeeds
335	+	*/
336		public void testCancelBeforeRun2() {
337	<	FutureTask task = new FutureTask( new NoOpCallable());
337	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
338		assertTrue(task.cancel(true));
339	<	task.run();
340	<	assertTrue(task.isDone());
341	<	assertTrue(task.isCancelled());
339	>	task.run();
340	>	assertEquals(0, task.runCount());
341	>	assertEquals(0, task.setCount());
342	>	assertEquals(0, task.setExceptionCount());
343	>	assertTrue(task.isCancelled());
344	>	assertTrue(task.isDone());
345	>	tryToConfuseDoneTask(task);
346	>	assertEquals(0, task.runCount());
347	>	checkCancelled(task);
348		}
349
350	+	/**
351	+	* cancel(false) of a completed task fails
352	+	*/
353		public void testCancelAfterRun() {
354	<	FutureTask task = new FutureTask( new NoOpCallable());
355	<	task.run();
354	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
355	>	task.run();
356		assertFalse(task.cancel(false));
357	<	assertTrue(task.isDone());
358	<	assertFalse(task.isCancelled());
357	>	assertEquals(1, task.runCount());
358	>	assertEquals(1, task.setCount());
359	>	assertEquals(0, task.setExceptionCount());
360	>	tryToConfuseDoneTask(task);
361	>	checkCompletedNormally(task, Boolean.TRUE);
362	>	assertEquals(1, task.runCount());
363	>	}
364	>
365	>	/**
366	>	* cancel(true) of a completed task fails
367	>	*/
368	>	public void testCancelAfterRun2() {
369	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
370	>	task.run();
371	>	assertFalse(task.cancel(true));
372	>	assertEquals(1, task.runCount());
373	>	assertEquals(1, task.setCount());
374	>	assertEquals(0, task.setExceptionCount());
375	>	tryToConfuseDoneTask(task);
376	>	checkCompletedNormally(task, Boolean.TRUE);
377	>	assertEquals(1, task.runCount());
378	>	}
379	>
380	>	/**
381	>	* cancel(true) interrupts a running task that subsequently succeeds
382	>	*/
383	>	public void testCancelInterrupt() {
384	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
385	>	final PublicFutureTask task =
386	>	new PublicFutureTask(new CheckedRunnable() {
387	>	public void realRun() {
388	>	pleaseCancel.countDown();
389	>	try {
390	>	delay(LONG_DELAY_MS);
391	>	shouldThrow();
392	>	} catch (InterruptedException success) {}
393	>	}});
394	>
395	>	Thread t = newStartedThread(task);
396	>	await(pleaseCancel);
397	>	assertTrue(task.cancel(true));
398	>	assertTrue(task.isCancelled());
399	>	assertTrue(task.isDone());
400	>	awaitTermination(t);
401	>	assertEquals(1, task.runCount());
402	>	assertEquals(1, task.setCount());
403	>	assertEquals(0, task.setExceptionCount());
404	>	tryToConfuseDoneTask(task);
405	>	checkCancelled(task);
406	>	}
407	>
408	>	/**
409	>	* cancel(true) tries to interrupt a running task, but
410	>	* Thread.interrupt throws (simulating a restrictive security
411	>	* manager)
412	>	*/
413	>	public void testCancelInterrupt_ThrowsSecurityException() {
414	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
415	>	final CountDownLatch cancelled = new CountDownLatch(1);
416	>	final PublicFutureTask task =
417	>	new PublicFutureTask(new CheckedRunnable() {
418	>	public void realRun() {
419	>	pleaseCancel.countDown();
420	>	await(cancelled);
421	>	assertFalse(Thread.interrupted());
422	>	}});
423	>
424	>	final Thread t = new Thread(task) {
425	>	// Simulate a restrictive security manager.
426	>	@Override public void interrupt() {
427	>	throw new SecurityException();
428	>	}};
429	>	t.setDaemon(true);
430	>	t.start();
431	>
432	>	await(pleaseCancel);
433	>	try {
434	>	task.cancel(true);
435	>	shouldThrow();
436	>	} catch (SecurityException expected) {}
437	>
438	>	// We failed to deliver the interrupt, but the world retains
439	>	// its sanity, as if we had done task.cancel(false)
440	>	assertTrue(task.isCancelled());
441	>	assertTrue(task.isDone());
442	>	assertEquals(1, task.runCount());
443	>	assertEquals(1, task.doneCount());
444	>	assertEquals(0, task.setCount());
445	>	assertEquals(0, task.setExceptionCount());
446	>	cancelled.countDown();
447	>	awaitTermination(t);
448	>	assertEquals(1, task.setCount());
449	>	assertEquals(0, task.setExceptionCount());
450	>	tryToConfuseDoneTask(task);
451	>	checkCancelled(task);
452		}
453
454	<	public void testCancelInterrupt(){
455	<	FutureTask task = new FutureTask( new Callable() {
456	<	public Object call() {
454	>	/**
455	>	* cancel(true) interrupts a running task that subsequently throws
456	>	*/
457	>	public void testCancelInterrupt_taskFails() {
458	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
459	>	final PublicFutureTask task =
460	>	new PublicFutureTask(new Runnable() {
461	>	public void run() {
462		try {
463	<	Thread.sleep(MEDIUM_DELAY_MS);
464	<	threadFail("should throw");
465	<	}
466	<	catch (InterruptedException success) {}
463	>	pleaseCancel.countDown();
464	>	delay(LONG_DELAY_MS);
465	>	} finally { throw new RuntimeException(); }
466	>	}});
467	>
468	>	Thread t = newStartedThread(task);
469	>	await(pleaseCancel);
470	>	assertTrue(task.cancel(true));
471	>	assertTrue(task.isCancelled());
472	>	awaitTermination(t);
473	>	assertEquals(1, task.runCount());
474	>	assertEquals(0, task.setCount());
475	>	assertEquals(1, task.setExceptionCount());
476	>	tryToConfuseDoneTask(task);
477	>	checkCancelled(task);
478	>	}
479	>
480	>	/**
481	>	* cancel(false) does not interrupt a running task
482	>	*/
483	>	public void testCancelNoInterrupt() {
484	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
485	>	final CountDownLatch cancelled = new CountDownLatch(1);
486	>	final PublicFutureTask task =
487	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
488	>	public Boolean realCall() {
489	>	pleaseCancel.countDown();
490	>	await(cancelled);
491	>	assertFalse(Thread.interrupted());
492		return Boolean.TRUE;
493	<	} });
494	<	Thread t = new  Thread(task);
495	<	t.start();
496	<
497	<	try{
498	<	Thread.sleep(SHORT_DELAY_MS);
499	<	assertTrue(task.cancel(true));
500	<	t.join();
501	<	assertTrue(task.isDone());
502	<	assertTrue(task.isCancelled());
503	<	} catch(InterruptedException e){
504	<	fail("unexpected exception");
493	>	}});
494	>
495	>	Thread t = newStartedThread(task);
496	>	await(pleaseCancel);
497	>	assertTrue(task.cancel(false));
498	>	assertTrue(task.isCancelled());
499	>	cancelled.countDown();
500	>	awaitTermination(t);
501	>	assertEquals(1, task.runCount());
502	>	assertEquals(1, task.setCount());
503	>	assertEquals(0, task.setExceptionCount());
504	>	tryToConfuseDoneTask(task);
505	>	checkCancelled(task);
506	>	}
507	>
508	>	/**
509	>	* run in one thread causes get in another thread to retrieve value
510	>	*/
511	>	public void testGetRun() {
512	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
513	>
514	>	final PublicFutureTask task =
515	>	new PublicFutureTask(new CheckedCallable<Object>() {
516	>	public Object realCall() {
517	>	return two;
518	>	}});
519	>
520	>	Thread t1 = newStartedThread(new CheckedRunnable() {
521	>	public void realRun() throws Exception {
522	>	pleaseRun.countDown();
523	>	assertSame(two, task.get());
524	>	}});
525	>
526	>	Thread t2 = newStartedThread(new CheckedRunnable() {
527	>	public void realRun() throws Exception {
528	>	pleaseRun.countDown();
529	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
530	>	}});
531	>
532	>	await(pleaseRun);
533	>	checkNotDone(task);
534	>	assertTrue(t1.isAlive());
535	>	assertTrue(t2.isAlive());
536	>	task.run();
537	>	checkCompletedNormally(task, two);
538	>	assertEquals(1, task.runCount());
539	>	assertEquals(1, task.setCount());
540	>	assertEquals(0, task.setExceptionCount());
541	>	awaitTermination(t1);
542	>	awaitTermination(t2);
543	>	tryToConfuseDoneTask(task);
544	>	checkCompletedNormally(task, two);
545	>	}
546	>
547	>	/**
548	>	* set in one thread causes get in another thread to retrieve value
549	>	*/
550	>	public void testGetSet() {
551	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
552	>
553	>	final PublicFutureTask task =
554	>	new PublicFutureTask(new CheckedCallable<Object>() {
555	>	public Object realCall() throws InterruptedException {
556	>	return two;
557	>	}});
558	>
559	>	Thread t1 = newStartedThread(new CheckedRunnable() {
560	>	public void realRun() throws Exception {
561	>	pleaseSet.countDown();
562	>	assertSame(two, task.get());
563	>	}});
564	>
565	>	Thread t2 = newStartedThread(new CheckedRunnable() {
566	>	public void realRun() throws Exception {
567	>	pleaseSet.countDown();
568	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
569	>	}});
570	>
571	>	await(pleaseSet);
572	>	checkNotDone(task);
573	>	assertTrue(t1.isAlive());
574	>	assertTrue(t2.isAlive());
575	>	task.set(two);
576	>	assertEquals(0, task.runCount());
577	>	assertEquals(1, task.setCount());
578	>	assertEquals(0, task.setExceptionCount());
579	>	tryToConfuseDoneTask(task);
580	>	checkCompletedNormally(task, two);
581	>	awaitTermination(t1);
582	>	awaitTermination(t2);
583	>	}
584	>
585	>	/**
586	>	* Cancelling a task causes timed get in another thread to throw
587	>	* CancellationException
588	>	*/
589	>	public void testTimedGet_Cancellation() {
590	>	for (final boolean mayInterruptIfRunning :
591	>	new boolean[] { true, false }) {
592	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
593	>	final CountDownLatch cancelled = new CountDownLatch(1);
594	>	final PublicFutureTask task =
595	>	new PublicFutureTask(new CheckedCallable<Object>() {
596	>	public Object realCall() throws InterruptedException {
597	>	pleaseCancel.countDown();
598	>	if (mayInterruptIfRunning) {
599	>	try {
600	>	delay(2*LONG_DELAY_MS);
601	>	} catch (InterruptedException success) {}
602	>	} else {
603	>	await(cancelled);
604	>	}
605	>	return two;
606	>	}});
607	>
608	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
609	>	public void realRun() throws Exception {
610	>	pleaseCancel.countDown();
611	>	task.get();
612	>	}};
613	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
614	>	public void realRun() throws Exception {
615	>	pleaseCancel.countDown();
616	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
617	>	}};
618	>	t1.start();
619	>	t2.start();
620	>	Thread t3 = newStartedThread(task);
621	>	await(pleaseCancel);
622	>	checkIsRunning(task);
623	>	task.cancel(mayInterruptIfRunning);
624	>	checkCancelled(task);
625	>	awaitTermination(t1);
626	>	awaitTermination(t2);
627	>	cancelled.countDown();
628	>	awaitTermination(t3);
629	>	assertEquals(1, task.runCount());
630	>	assertEquals(1, task.setCount());
631	>	assertEquals(0, task.setExceptionCount());
632	>	tryToConfuseDoneTask(task);
633	>	checkCancelled(task);
634		}
635		}
636
637	+	/**
638	+	* A runtime exception in task causes get to throw ExecutionException
639	+	*/
640	+	public void testGet_ExecutionException() throws InterruptedException {
641	+	final ArithmeticException e = new ArithmeticException();
642	+	final PublicFutureTask task = new PublicFutureTask(new Callable() {
643	+	public Object call() {
644	+	throw e;
645	+	}});
646	+
647	+	task.run();
648	+	assertEquals(1, task.runCount());
649	+	assertEquals(0, task.setCount());
650	+	assertEquals(1, task.setExceptionCount());
651	+	try {
652	+	task.get();
653	+	shouldThrow();
654	+	} catch (ExecutionException success) {
655	+	assertSame(e, success.getCause());
656	+	tryToConfuseDoneTask(task);
657	+	checkCompletedAbnormally(task, success.getCause());
658	+	}
659	+	}
660
661	<	public void testCancelNoInterrupt(){
662	<	FutureTask task = new FutureTask( new Callable() {
663	<	public Object call() {
664	<	try {
665	<	Thread.sleep(MEDIUM_DELAY_MS);
666	<	}
667	<	catch (InterruptedException success) {
668	<	threadFail("should not interrupt");
669	<	}
670	<	return Boolean.TRUE;
671	<	} });
672	<	Thread t = new  Thread(task);
673	<	t.start();
674	<
675	<	try{
676	<	Thread.sleep(SHORT_DELAY_MS);
677	<	assertTrue(task.cancel(false));
678	<	t.join();
184	<	assertTrue(task.isDone());
185	<	assertTrue(task.isCancelled());
186	<	} catch(InterruptedException e){
187	<	fail("unexpected exception");
661	>	/**
662	>	* A runtime exception in task causes timed get to throw ExecutionException
663	>	*/
664	>	public void testTimedGet_ExecutionException2() throws Exception {
665	>	final ArithmeticException e = new ArithmeticException();
666	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
667	>	public Object call() {
668	>	throw e;
669	>	}});
670	>
671	>	task.run();
672	>	try {
673	>	task.get(LONG_DELAY_MS, MILLISECONDS);
674	>	shouldThrow();
675	>	} catch (ExecutionException success) {
676	>	assertSame(e, success.getCause());
677	>	tryToConfuseDoneTask(task);
678	>	checkCompletedAbnormally(task, success.getCause());
679		}
680		}
681
682	<	public void testGet1() {
683	<	final FutureTask ft = new FutureTask(new Callable(){
684	<	public Object call(){
685	<	try{
686	<	Thread.sleep(MEDIUM_DELAY_MS);
687	<	} catch(InterruptedException e){
688	<	threadFail("unexpected exception");
689	<	}
690	<	return Boolean.TRUE;
691	<	}
692	<	});
693	<	Thread t = new Thread(new Runnable(){
694	<	public void run(){
695	<	try{
696	<	ft.get();
697	<	} catch(Exception e){
698	<	threadFail("unexpected exception");
699	<	}
700	<	}
701	<	});
702	<	try{
703	<	assertFalse(ft.isDone());
704	<	assertFalse(ft.isCancelled());
705	<	t.start();
706	<	Thread.sleep(SHORT_DELAY_MS);
707	<	ft.run();
708	<	t.join();
218	<	assertTrue(ft.isDone());
219	<	assertFalse(ft.isCancelled());
220	<	} catch(InterruptedException e){
221	<	fail("unexpected exception");
222	<
223	<	}
224	<	}
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	<	}
234	<	return Boolean.TRUE;
235	<	}
236	<	});
237	<	Thread t = new Thread(new Runnable(){
238	<	public void run(){
239	<	try{
240	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
241	<	} catch(TimeoutException success) {
242	<	} catch(Exception e){
243	<	threadFail("unexpected exception");
244	<	}
245	<	}
246	<	});
247	<	try{
248	<	assertFalse(ft.isDone());
249	<	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	<	}
682	>	/**
683	>	* get is interruptible
684	>	*/
685	>	public void testGet_interruptible() {
686	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
687	>	final FutureTask task = new FutureTask(new NoOpCallable());
688	>	Thread t = newStartedThread(new CheckedRunnable() {
689	>	public void realRun() throws Exception {
690	>	Thread.currentThread().interrupt();
691	>	try {
692	>	task.get();
693	>	shouldThrow();
694	>	} catch (InterruptedException success) {}
695	>	assertFalse(Thread.interrupted());
696	>
697	>	pleaseInterrupt.countDown();
698	>	try {
699	>	task.get();
700	>	shouldThrow();
701	>	} catch (InterruptedException success) {}
702	>	assertFalse(Thread.interrupted());
703	>	}});
704	>
705	>	await(pleaseInterrupt);
706	>	t.interrupt();
707	>	awaitTermination(t);
708	>	checkNotDone(task);
709		}
710
711	+	/**
712	+	* timed get is interruptible
713	+	*/
714	+	public void testTimedGet_interruptible() {
715	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
716	+	final FutureTask task = new FutureTask(new NoOpCallable());
717	+	Thread t = newStartedThread(new CheckedRunnable() {
718	+	public void realRun() throws Exception {
719	+	Thread.currentThread().interrupt();
720	+	try {
721	+	task.get(2*LONG_DELAY_MS, MILLISECONDS);
722	+	shouldThrow();
723	+	} catch (InterruptedException success) {}
724	+	assertFalse(Thread.interrupted());
725	+
726	+	pleaseInterrupt.countDown();
727	+	try {
728	+	task.get(2*LONG_DELAY_MS, MILLISECONDS);
729	+	shouldThrow();
730	+	} catch (InterruptedException success) {}
731	+	assertFalse(Thread.interrupted());
732	+	}});
733	+
734	+	await(pleaseInterrupt);
735	+	t.interrupt();
736	+	awaitTermination(t);
737	+	checkNotDone(task);
738	+	}
739
740	<	public void testGet_Cancellation(){
741	<	final FutureTask ft = new FutureTask(new Callable(){
742	<	public Object call(){
743	<	try{
744	<	Thread.sleep(MEDIUM_DELAY_MS);
745	<	} catch(InterruptedException e){
746	<	threadFail("unexpected exception");
747	<	}
748	<	return Boolean.TRUE;
749	<	}
750	<	});
751	<	try {
752	<	Thread.sleep(SHORT_DELAY_MS);
753	<	Thread t = new Thread(new Runnable(){
754	<	public void run(){
755	<	try{
756	<	ft.get();
757	<	threadFail("should throw");
758	<	} catch(CancellationException success){
759	<	}
760	<	catch(Exception e){
761	<	threadFail("unexpected exception");
762	<	}
763	<	}
764	<	});
765	<	t.start();
766	<	ft.cancel(true);
767	<	t.join();
768	<	} catch(InterruptedException success){
769	<	fail("unexpected exception");
770	<	}
771	<	}
772	<
773	<	public void testGet_Cancellation2(){
774	<	final FutureTask ft = new FutureTask(new Callable(){
775	<	public Object call(){
298	<	try{
299	<	Thread.sleep(SHORT_DELAY_MS);
300	<	} catch(InterruptedException e) {
301	<	threadFail("unexpected exception");
302	<	}
303	<	return Boolean.TRUE;
304	<	}
305	<	});
306	<	try{
307	<	Thread.sleep(SHORT_DELAY_MS);
308	<	Thread t = new Thread(new Runnable(){
309	<	public void run(){
310	<	try{
311	<	ft.get(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
312	<	threadFail("should throw");
313	<	} catch(CancellationException success) {}
314	<	catch(Exception e){
315	<	threadFail("unexpected exception");
316	<	}
317	<	}
318	<	});
319	<	t.start();
320	<	Thread.sleep(SHORT_DELAY_MS);
321	<	ft.cancel(true);
322	<	Thread.sleep(SHORT_DELAY_MS);
323	<	t.join();
324	<	} catch(InterruptedException ie){
325	<	fail("unexpected exception");
326	<	}
327	<	}
328	<
329	<	public void testGet_ExecutionException(){
330	<	final FutureTask ft = new FutureTask(new Callable(){
331	<	public Object call(){
332	<	int i = 5/0;
333	<	return Boolean.TRUE;
334	<	}
335	<	});
336	<	try{
337	<	ft.run();
338	<	ft.get();
339	<	fail("should throw");
340	<	} catch(ExecutionException success){
341	<	}
342	<	catch(Exception e){
343	<	fail("unexpected exception");
344	<	}
345	<	}
346	<
347	<	public void testTimedGet_ExecutionException2(){
348	<	final FutureTask ft = new FutureTask(new Callable(){
349	<	public Object call(){
350	<	int i = 5/0;
351	<	return Boolean.TRUE;
352	<	}
353	<	});
354	<	try{
355	<	ft.run();
356	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
357	<	fail("should throw");
358	<	} catch(ExecutionException success) {
359	<	} catch(TimeoutException success) { } // unlikely but OK
360	<	catch(Exception e){
361	<	fail("unexpected exception");
362	<	}
363	<	}
364	<
365	<
366	<	public void testGet_InterruptedException(){
367	<	final FutureTask ft = new FutureTask(new NoOpCallable());
368	<	Thread t = new Thread(new Runnable(){
369	<	public void run(){
370	<	try{
371	<	ft.get();
372	<	threadFail("should throw");
373	<	} catch(InterruptedException success){
374	<	} catch(Exception e){
375	<	threadFail("unexpected exception");
376	<	}
377	<	}
378	<	});
379	<	try {
380	<	t.start();
381	<	Thread.sleep(SHORT_DELAY_MS);
382	<	t.interrupt();
383	<	t.join();
384	<	} catch(Exception e){
385	<	fail("unexpected exception");
386	<	}
387	<	}
388	<
389	<	public void testTimedGet_InterruptedException2(){
390	<	final FutureTask ft = new FutureTask(new NoOpCallable());
391	<	Thread t = new Thread(new Runnable(){
392	<	public void run(){
393	<	try{
394	<	ft.get(LONG_DELAY_MS,TimeUnit.MILLISECONDS);
395	<	threadFail("should throw");
396	<	} catch(InterruptedException success){}
397	<	catch(Exception e){
398	<	threadFail("unexpected exception");
399	<	}
400	<	}
401	<	});
402	<	try {
403	<	t.start();
404	<	Thread.sleep(SHORT_DELAY_MS);
405	<	t.interrupt();
406	<	t.join();
407	<	} catch(Exception e){
408	<	fail("unexpected exception");
409	<	}
410	<	}
411	<
412	<	public void testGet_TimeoutException(){
413	<	try{
414	<	FutureTask ft = new FutureTask(new NoOpCallable());
415	<	ft.get(1,TimeUnit.MILLISECONDS);
416	<	fail("should throw");
417	<	} catch(TimeoutException success){}
418	<	catch(Exception success){
419	<	fail("unexpected exception");
420	<	}
740	>	/**
741	>	* A timed out timed get throws TimeoutException
742	>	*/
743	>	public void testGet_TimeoutException() throws Exception {
744	>	FutureTask task = new FutureTask(new NoOpCallable());
745	>	long startTime = System.nanoTime();
746	>	try {
747	>	task.get(timeoutMillis(), MILLISECONDS);
748	>	shouldThrow();
749	>	} catch (TimeoutException success) {
750	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
751	>	}
752	>	}
753	>
754	>	/**
755	>	* timed get with null TimeUnit throws NullPointerException
756	>	*/
757	>	public void testGet_NullTimeUnit() throws Exception {
758	>	FutureTask task = new FutureTask(new NoOpCallable());
759	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
760	>
761	>	for (long timeout : timeouts) {
762	>	try {
763	>	task.get(timeout, null);
764	>	shouldThrow();
765	>	} catch (NullPointerException success) {}
766	>	}
767	>
768	>	task.run();
769	>
770	>	for (long timeout : timeouts) {
771	>	try {
772	>	task.get(timeout, null);
773	>	shouldThrow();
774	>	} catch (NullPointerException success) {}
775	>	}
776		}
777	<
777	>
778		}

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