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Comparing jsr166/src/test/tck/FutureTaskTest.java (file contents):
Revision 1.8 by dl, Mon Dec 22 00:48:55 2003 UTC vs.
Revision 1.34 by jsr166, Sat Dec 29 19:07:32 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.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 java.util.concurrent.atomic.AtomicInteger;
18	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
19	>	import static java.util.concurrent.TimeUnit.SECONDS;
20		import java.util.*;
21
22		public class FutureTaskTest extends JSR166TestCase {
23
24		public static void main(String[] args) {
25	<	junit.textui.TestRunner.run (suite());
25	>	junit.textui.TestRunner.run(suite());
26		}
27		public static Test suite() {
28	<	return new TestSuite(FutureTaskTest.class);
28	>	return new TestSuite(FutureTaskTest.class);
29	>	}
30	>
31	>	void checkIsDone(Future<?> f) {
32	>	assertTrue(f.isDone());
33	>	assertFalse(f.cancel(false));
34	>	assertFalse(f.cancel(true));
35	>	if (f instanceof PublicFutureTask) {
36	>	PublicFutureTask pf = (PublicFutureTask) f;
37	>	assertEquals(1, pf.doneCount());
38	>	assertFalse(pf.runAndReset());
39	>	assertEquals(1, pf.doneCount());
40	>
41	>	// Check that run and runAndReset have no effect.
42	>	int savedRunCount = pf.runCount();
43	>	int savedSetCount = pf.setCount();
44	>	int savedSetExceptionCount = pf.setExceptionCount();
45	>	pf.run();
46	>	pf.runAndReset();
47	>	assertEquals(savedRunCount, pf.runCount());
48	>	assertEquals(savedSetCount, pf.setCount());
49	>	assertEquals(savedSetExceptionCount, pf.setExceptionCount());
50	>	assertTrue(f.isDone());
51	>	}
52	>	}
53	>
54	>	void checkNotDone(Future<?> f) {
55	>	assertFalse(f.isDone());
56	>	assertFalse(f.isCancelled());
57	>	if (f instanceof PublicFutureTask) {
58	>	PublicFutureTask pf = (PublicFutureTask) f;
59	>	assertEquals(0, pf.doneCount());
60	>	assertEquals(0, pf.setCount());
61	>	assertEquals(0, pf.setExceptionCount());
62	>	}
63	>	}
64	>
65	>	void checkIsRunning(Future<?> f) {
66	>	checkNotDone(f);
67	>	if (f instanceof FutureTask) {
68	>	FutureTask ft = (FutureTask<?>) f;
69	>	// Check that run methods do nothing
70	>	ft.run();
71	>	if (f instanceof PublicFutureTask)
72	>	assertFalse(((PublicFutureTask) f).runAndReset());
73	>	checkNotDone(f);
74	>	}
75	>	}
76	>
77	>	<T> void checkCompletedNormally(Future<T> f, T expected) {
78	>	checkIsDone(f);
79	>	assertFalse(f.isCancelled());
80	>
81	>	try {
82	>	assertSame(expected, f.get());
83	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
84	>	try {
85	>	assertSame(expected, f.get(5L, SECONDS));
86	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
87	>	}
88	>
89	>	void checkCancelled(Future<?> f) {
90	>	checkIsDone(f);
91	>	assertTrue(f.isCancelled());
92	>
93	>	try {
94	>	f.get();
95	>	shouldThrow();
96	>	} catch (CancellationException success) {
97	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
98	>
99	>	try {
100	>	f.get(5L, SECONDS);
101	>	shouldThrow();
102	>	} catch (CancellationException success) {
103	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
104	>	}
105	>
106	>	void tryToConfuseDoneTask(PublicFutureTask pf) {
107	>	pf.set(new Object());
108	>	pf.setException(new Error());
109	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
110	>	pf.cancel(true);
111	>	}
112	>	}
113	>
114	>	void checkCompletedAbnormally(Future<?> f, Throwable t) {
115	>	checkIsDone(f);
116	>	assertFalse(f.isCancelled());
117	>
118	>	try {
119	>	f.get();
120	>	shouldThrow();
121	>	} catch (ExecutionException success) {
122	>	assertSame(t, success.getCause());
123	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
124	>
125	>	try {
126	>	f.get(5L, SECONDS);
127	>	shouldThrow();
128	>	} catch (ExecutionException success) {
129	>	assertSame(t, success.getCause());
130	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
131		}
132
133		/**
134		* Subclass to expose protected methods
135		*/
136		static class PublicFutureTask extends FutureTask {
137	<	public PublicFutureTask(Callable r) { super(r); }
138	<	public boolean reset() { return super.reset(); }
139	<	public void setCancelled() { super.setCancelled(); }
140	<	public void set(Object x) { super.set(x); }
141	<	public void setException(Throwable t) { super.setException(t); }
137	>	private final AtomicInteger runCount;
138	>	private final AtomicInteger doneCount = new AtomicInteger(0);
139	>	private final AtomicInteger runAndResetCount = new AtomicInteger(0);
140	>	private final AtomicInteger setCount = new AtomicInteger(0);
141	>	private final AtomicInteger setExceptionCount = new AtomicInteger(0);
142	>	public int runCount() { return runCount.get(); }
143	>	public int doneCount() { return doneCount.get(); }
144	>	public int runAndResetCount() { return runAndResetCount.get(); }
145	>	public int setCount() { return setCount.get(); }
146	>	public int setExceptionCount() { return setExceptionCount.get(); }
147	>
148	>	PublicFutureTask(Runnable runnable) {
149	>	this(runnable, seven);
150	>	}
151	>	PublicFutureTask(Runnable runnable, Object result) {
152	>	this(runnable, result, new AtomicInteger(0));
153	>	}
154	>	private PublicFutureTask(final Runnable runnable, Object result,
155	>	final AtomicInteger runCount) {
156	>	super(new Runnable() {
157	>	public void run() {
158	>	runCount.getAndIncrement();
159	>	runnable.run();
160	>	}}, result);
161	>	this.runCount = runCount;
162	>	}
163	>	PublicFutureTask(Callable callable) {
164	>	this(callable, new AtomicInteger(0));
165	>	}
166	>	private PublicFutureTask(final Callable callable,
167	>	final AtomicInteger runCount) {
168	>	super(new Callable() {
169	>	public Object call() throws Exception {
170	>	runCount.getAndIncrement();
171	>	return callable.call();
172	>	}});
173	>	this.runCount = runCount;
174	>	}
175	>	@Override public void done() {
176	>	assertTrue(isDone());
177	>	doneCount.incrementAndGet();
178	>	super.done();
179	>	}
180	>	@Override public boolean runAndReset() {
181	>	runAndResetCount.incrementAndGet();
182	>	return super.runAndReset();
183	>	}
184	>	@Override public void set(Object x) {
185	>	setCount.incrementAndGet();
186	>	super.set(x);
187	>	}
188	>	@Override public void setException(Throwable t) {
189	>	setExceptionCount.incrementAndGet();
190	>	super.setException(t);
191	>	}
192	>	}
193	>
194	>	class Counter extends CheckedRunnable {
195	>	final AtomicInteger count = new AtomicInteger(0);
196	>	public int get() { return count.get(); }
197	>	public void realRun() {
198	>	count.getAndIncrement();
199	>	}
200		}
201
202		/**
203	<	* Creating a future with a null callable throws NPE
203	>	* creating a future with a null callable throws NullPointerException
204		*/
205		public void testConstructor() {
206		try {
207	<	FutureTask task = new FutureTask(null);
207	>	new FutureTask(null);
208		shouldThrow();
209	<	}
40	<	catch(NullPointerException success) {
41	<	}
209	>	} catch (NullPointerException success) {}
210		}
211
212		/**
213	<	* creating a future with null runnable fails
213	>	* creating a future with null runnable throws NullPointerException
214		*/
215		public void testConstructor2() {
216		try {
217	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
217	>	new FutureTask(null, Boolean.TRUE);
218		shouldThrow();
219	<	}
52	<	catch(NullPointerException success) {
53	<	}
219	>	} catch (NullPointerException success) {}
220		}
221
222		/**
223		* isDone is true when a task completes
224		*/
225		public void testIsDone() {
60	–	FutureTask task = new FutureTask( new NoOpCallable());
61	–	task.run();
62	–	assertTrue(task.isDone());
63	–	assertFalse(task.isCancelled());
64	–	}
65	–
66	–	/**
67	–	* reset of a done task succeeds and changes status to not done
68	–	*/
69	–	public void testReset() {
226		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
71	–	task.run();
72	–	assertTrue(task.isDone());
73	–	assertTrue(task.reset());
227		assertFalse(task.isDone());
228	+	task.run();
229	+	assertTrue(task.isDone());
230	+	checkCompletedNormally(task, Boolean.TRUE);
231	+	assertEquals(1, task.runCount());
232		}
233
234		/**
235	<	* Resetting after cancellation fails
235	>	* runAndReset of a non-cancelled task succeeds
236		*/
237	<	public void testResetAfterCancel() {
237	>	public void testRunAndReset() {
238		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
239	<	assertTrue(task.cancel(false));
240	<	task.run();
241	<	assertTrue(task.isDone());
242	<	assertTrue(task.isCancelled());
243	<	assertFalse(task.reset());
239	>	for (int i = 0; i < 3; i++) {
240	>	assertTrue(task.runAndReset());
241	>	checkNotDone(task);
242	>	assertEquals(i+1, task.runCount());
243	>	assertEquals(i+1, task.runAndResetCount());
244	>	assertEquals(0, task.setCount());
245	>	assertEquals(0, task.setExceptionCount());
246	>	}
247		}
248
89	–
249		/**
250	<	* setCancelled of a new task causes isCancelled to be true
250	>	* runAndReset after cancellation fails
251		*/
252	<	public void testSetCancelled() {
253	<	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
254	<	assertTrue(task.cancel(false));
255	<	task.setCancelled();
256	<	assertTrue(task.isDone());
257	<	assertTrue(task.isCancelled());
252	>	public void testRunAndResetAfterCancel() {
253	>	for (boolean mayInterruptIfRunning : new boolean[] { true, false }) {
254	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
255	>	assertTrue(task.cancel(mayInterruptIfRunning));
256	>	for (int i = 0; i < 3; i++) {
257	>	assertFalse(task.runAndReset());
258	>	assertEquals(0, task.runCount());
259	>	assertEquals(i+1, task.runAndResetCount());
260	>	assertEquals(0, task.setCount());
261	>	assertEquals(0, task.setExceptionCount());
262	>	}
263	>	tryToConfuseDoneTask(task);
264	>	checkCancelled(task);
265	>	}
266		}
267
268		/**
269	<	* setting value gauses get to return it
269	>	* setting value causes get to return it
270		*/
271	<	public void testSet() {
271	>	public void testSet() throws Exception {
272		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
273		task.set(one);
274	<	try {
275	<	assertEquals(task.get(), one);
276	<	}
277	<	catch(Exception e) {
278	<	unexpectedException();
279	<	}
274	>	for (int i = 0; i < 3; i++) {
275	>	assertSame(one, task.get());
276	>	assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS));
277	>	assertEquals(1, task.setCount());
278	>	}
279	>	tryToConfuseDoneTask(task);
280	>	checkCompletedNormally(task, one);
281	>	assertEquals(0, task.runCount());
282		}
283
284		/**
285		* setException causes get to throw ExecutionException
286		*/
287	<	public void testSetException() {
287	>	public void testSetException_get() throws Exception {
288		Exception nse = new NoSuchElementException();
289		PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
290		task.setException(nse);
291	+
292		try {
293	<	Object x = task.get();
293	>	task.get();
294		shouldThrow();
295	+	} catch (ExecutionException success) {
296	+	assertSame(nse, success.getCause());
297	+	checkCompletedAbnormally(task, nse);
298		}
299	<	catch(ExecutionException ee) {
300	<	Throwable cause = ee.getCause();
301	<	assertEquals(cause, nse);
302	<	}
303	<	catch(Exception e) {
304	<	unexpectedException();
299	>
300	>	try {
301	>	task.get(LONG_DELAY_MS, MILLISECONDS);
302	>	shouldThrow();
303	>	} catch (ExecutionException success) {
304	>	assertSame(nse, success.getCause());
305	>	checkCompletedAbnormally(task, nse);
306		}
307	+
308	+	assertEquals(1, task.setExceptionCount());
309	+	assertEquals(0, task.setCount());
310	+	tryToConfuseDoneTask(task);
311	+	checkCompletedAbnormally(task, nse);
312	+	assertEquals(0, task.runCount());
313		}
314
315		/**
316	<	*  Cancelling before running succeeds
316	>	* cancel(false) before run succeeds
317		*/
318		public void testCancelBeforeRun() {
319	<	FutureTask task = new FutureTask( new NoOpCallable());
319	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
320		assertTrue(task.cancel(false));
321	<	task.run();
322	<	assertTrue(task.isDone());
323	<	assertTrue(task.isCancelled());
321	>	task.run();
322	>	assertEquals(0, task.runCount());
323	>	assertEquals(0, task.setCount());
324	>	assertEquals(0, task.setExceptionCount());
325	>	assertTrue(task.isCancelled());
326	>	assertTrue(task.isDone());
327	>	tryToConfuseDoneTask(task);
328	>	assertEquals(0, task.runCount());
329	>	checkCancelled(task);
330		}
331
332		/**
333	<	* Cancel(true) before run succeeds
333	>	* cancel(true) before run succeeds
334		*/
335		public void testCancelBeforeRun2() {
336	<	FutureTask task = new FutureTask( new NoOpCallable());
336	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
337		assertTrue(task.cancel(true));
338	<	task.run();
339	<	assertTrue(task.isDone());
340	<	assertTrue(task.isCancelled());
338	>	task.run();
339	>	assertEquals(0, task.runCount());
340	>	assertEquals(0, task.setCount());
341	>	assertEquals(0, task.setExceptionCount());
342	>	assertTrue(task.isCancelled());
343	>	assertTrue(task.isDone());
344	>	tryToConfuseDoneTask(task);
345	>	assertEquals(0, task.runCount());
346	>	checkCancelled(task);
347		}
348
349		/**
350	<	* cancel of a completed task fails
350	>	* cancel(false) of a completed task fails
351		*/
352		public void testCancelAfterRun() {
353	<	FutureTask task = new FutureTask( new NoOpCallable());
354	<	task.run();
353	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
354	>	task.run();
355		assertFalse(task.cancel(false));
356	<	assertTrue(task.isDone());
357	<	assertFalse(task.isCancelled());
356	>	assertEquals(1, task.runCount());
357	>	assertEquals(1, task.setCount());
358	>	assertEquals(0, task.setExceptionCount());
359	>	tryToConfuseDoneTask(task);
360	>	checkCompletedNormally(task, Boolean.TRUE);
361	>	assertEquals(1, task.runCount());
362		}
363
364		/**
365	<	* cancel(true) interrupts a running task
365	>	* cancel(true) of a completed task fails
366	>	*/
367	>	public void testCancelAfterRun2() {
368	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
369	>	task.run();
370	>	assertFalse(task.cancel(true));
371	>	assertEquals(1, task.runCount());
372	>	assertEquals(1, task.setCount());
373	>	assertEquals(0, task.setExceptionCount());
374	>	tryToConfuseDoneTask(task);
375	>	checkCompletedNormally(task, Boolean.TRUE);
376	>	assertEquals(1, task.runCount());
377	>	}
378	>
379	>	/**
380	>	* cancel(true) interrupts a running task that subsequently succeeds
381		*/
382		public void testCancelInterrupt() {
383	<	FutureTask task = new FutureTask( new Callable() {
384	<	public Object call() {
383	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
384	>	final PublicFutureTask task =
385	>	new PublicFutureTask(new CheckedRunnable() {
386	>	public void realRun() {
387	>	pleaseCancel.countDown();
388		try {
389	<	Thread.sleep(MEDIUM_DELAY_MS);
390	<	threadShouldThrow();
391	<	}
392	<	catch (InterruptedException success) {}
393	<	return Boolean.TRUE;
394	<	} });
395	<	Thread t = new  Thread(task);
389	>	delay(LONG_DELAY_MS);
390	>	shouldThrow();
391	>	} catch (InterruptedException success) {}
392	>	}});
393	>
394	>	Thread t = newStartedThread(task);
395	>	await(pleaseCancel);
396	>	assertTrue(task.cancel(true));
397	>	assertTrue(task.isCancelled());
398	>	assertTrue(task.isDone());
399	>	awaitTermination(t);
400	>	assertEquals(1, task.runCount());
401	>	assertEquals(1, task.setCount());
402	>	assertEquals(0, task.setExceptionCount());
403	>	tryToConfuseDoneTask(task);
404	>	checkCancelled(task);
405	>	}
406	>
407	>	/**
408	>	* cancel(true) tries to interrupt a running task, but
409	>	* Thread.interrupt throws (simulating a restrictive security
410	>	* manager)
411	>	*/
412	>	public void testCancelInterrupt_ThrowsSecurityException() {
413	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
414	>	final CountDownLatch cancelled = new CountDownLatch(1);
415	>	final PublicFutureTask task =
416	>	new PublicFutureTask(new CheckedRunnable() {
417	>	public void realRun() {
418	>	pleaseCancel.countDown();
419	>	await(cancelled);
420	>	assertFalse(Thread.interrupted());
421	>	}});
422	>
423	>	final Thread t = new Thread(task) {
424	>	// Simulate a restrictive security manager.
425	>	@Override public void interrupt() {
426	>	throw new SecurityException();
427	>	}};
428	>	t.setDaemon(true);
429		t.start();
430	<
430	>
431	>	await(pleaseCancel);
432		try {
433	<	Thread.sleep(SHORT_DELAY_MS);
434	<	assertTrue(task.cancel(true));
435	<	t.join();
436	<	assertTrue(task.isDone());
437	<	assertTrue(task.isCancelled());
438	<	} catch(InterruptedException e){
439	<	unexpectedException();
440	<	}
433	>	task.cancel(true);
434	>	shouldThrow();
435	>	} catch (SecurityException expected) {}
436	>
437	>	// We failed to deliver the interrupt, but the world retains
438	>	// its sanity, as if we had done task.cancel(false)
439	>	assertTrue(task.isCancelled());
440	>	assertTrue(task.isDone());
441	>	assertEquals(1, task.runCount());
442	>	assertEquals(1, task.doneCount());
443	>	assertEquals(0, task.setCount());
444	>	assertEquals(0, task.setExceptionCount());
445	>	cancelled.countDown();
446	>	awaitTermination(t);
447	>	assertEquals(1, task.setCount());
448	>	assertEquals(0, task.setExceptionCount());
449	>	tryToConfuseDoneTask(task);
450	>	checkCancelled(task);
451		}
452
453	+	/**
454	+	* cancel(true) interrupts a running task that subsequently throws
455	+	*/
456	+	public void testCancelInterrupt_taskFails() {
457	+	final CountDownLatch pleaseCancel = new CountDownLatch(1);
458	+	final PublicFutureTask task =
459	+	new PublicFutureTask(new Runnable() {
460	+	public void run() {
461	+	try {
462	+	pleaseCancel.countDown();
463	+	delay(LONG_DELAY_MS);
464	+	} finally { throw new RuntimeException(); }
465	+	}});
466	+
467	+	Thread t = newStartedThread(task);
468	+	await(pleaseCancel);
469	+	assertTrue(task.cancel(true));
470	+	assertTrue(task.isCancelled());
471	+	awaitTermination(t);
472	+	assertEquals(1, task.runCount());
473	+	assertEquals(0, task.setCount());
474	+	assertEquals(1, task.setExceptionCount());
475	+	tryToConfuseDoneTask(task);
476	+	checkCancelled(task);
477	+	}
478
479		/**
480		* cancel(false) does not interrupt a running task
481		*/
482		public void testCancelNoInterrupt() {
483	<	FutureTask task = new FutureTask( new Callable() {
484	<	public Object call() {
485	<	try {
486	<	Thread.sleep(MEDIUM_DELAY_MS);
487	<	}
488	<	catch (InterruptedException success) {
489	<	threadFail("should not interrupt");
490	<	}
483	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
484	>	final CountDownLatch cancelled = new CountDownLatch(1);
485	>	final PublicFutureTask task =
486	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
487	>	public Boolean realCall() {
488	>	pleaseCancel.countDown();
489	>	await(cancelled);
490	>	assertFalse(Thread.interrupted());
491		return Boolean.TRUE;
492	<	} });
493	<	Thread t = new  Thread(task);
494	<	t.start();
495	<
496	<	try {
497	<	Thread.sleep(SHORT_DELAY_MS);
498	<	assertTrue(task.cancel(false));
499	<	t.join();
500	<	assertTrue(task.isDone());
501	<	assertTrue(task.isCancelled());
502	<	} catch(InterruptedException e){
503	<	unexpectedException();
504	<	}
492	>	}});
493	>
494	>	Thread t = newStartedThread(task);
495	>	await(pleaseCancel);
496	>	assertTrue(task.cancel(false));
497	>	assertTrue(task.isCancelled());
498	>	cancelled.countDown();
499	>	awaitTermination(t);
500	>	assertEquals(1, task.runCount());
501	>	assertEquals(1, task.setCount());
502	>	assertEquals(0, task.setExceptionCount());
503	>	tryToConfuseDoneTask(task);
504	>	checkCancelled(task);
505		}
506
507		/**
508	<	* set in one thread causes get in another thread to retrieve value
509	<	*/
510	<	public void testGet1() {
511	<	final FutureTask ft = new FutureTask(new Callable() {
512	<	public Object call() {
513	<	try {
514	<	Thread.sleep(MEDIUM_DELAY_MS);
515	<	} catch(InterruptedException e){
516	<	threadUnexpectedException();
517	<	}
518	<	return Boolean.TRUE;
519	<	}
520	<	});
521	<	Thread t = new Thread(new Runnable() {
522	<	public void run() {
523	<	try {
524	<	ft.get();
525	<	} catch(Exception e){
526	<	threadUnexpectedException();
527	<	}
528	<	}
529	<	});
530	<	try {
531	<	assertFalse(ft.isDone());
532	<	assertFalse(ft.isCancelled());
533	<	t.start();
534	<	Thread.sleep(SHORT_DELAY_MS);
535	<	ft.run();
536	<	t.join();
537	<	assertTrue(ft.isDone());
538	<	assertFalse(ft.isCancelled());
539	<	} catch(InterruptedException e){
540	<	unexpectedException();
541	<
542	<	}
508	>	* run in one thread causes get in another thread to retrieve value
509	>	*/
510	>	public void testGetRun() {
511	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
512	>
513	>	final PublicFutureTask task =
514	>	new PublicFutureTask(new CheckedCallable<Object>() {
515	>	public Object realCall() {
516	>	return two;
517	>	}});
518	>
519	>	Thread t1 = newStartedThread(new CheckedRunnable() {
520	>	public void realRun() throws Exception {
521	>	pleaseRun.countDown();
522	>	assertSame(two, task.get());
523	>	}});
524	>
525	>	Thread t2 = newStartedThread(new CheckedRunnable() {
526	>	public void realRun() throws Exception {
527	>	pleaseRun.countDown();
528	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
529	>	}});
530	>
531	>	await(pleaseRun);
532	>	checkNotDone(task);
533	>	assertTrue(t1.isAlive());
534	>	assertTrue(t2.isAlive());
535	>	task.run();
536	>	checkCompletedNormally(task, two);
537	>	assertEquals(1, task.runCount());
538	>	assertEquals(1, task.setCount());
539	>	assertEquals(0, task.setExceptionCount());
540	>	awaitTermination(t1);
541	>	awaitTermination(t2);
542	>	tryToConfuseDoneTask(task);
543	>	checkCompletedNormally(task, two);
544		}
545
546		/**
547	<	* set in one thread causes timed get in another thread to retrieve value
548	<	*/
549	<	public void testTimedGet1() {
550	<	final FutureTask ft = new FutureTask(new Callable() {
551	<	public Object call() {
552	<	try {
553	<	Thread.sleep(MEDIUM_DELAY_MS);
554	<	} catch(InterruptedException e){
555	<	threadUnexpectedException();
556	<	}
557	<	return Boolean.TRUE;
558	<	}
559	<	});
560	<	Thread t = new Thread(new Runnable() {
561	<	public void run() {
562	<	try {
563	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
564	<	} catch(TimeoutException success) {
565	<	} catch(Exception e){
566	<	threadUnexpectedException();
567	<	}
568	<	}
569	<	});
570	<	try {
571	<	assertFalse(ft.isDone());
572	<	assertFalse(ft.isCancelled());
573	<	t.start();
574	<	ft.run();
575	<	t.join();
576	<	assertTrue(ft.isDone());
577	<	assertFalse(ft.isCancelled());
578	<	} catch(InterruptedException e){
579	<	unexpectedException();
580	<
581	<	}
547	>	* set in one thread causes get in another thread to retrieve value
548	>	*/
549	>	public void testGetSet() {
550	>	final CountDownLatch pleaseSet = new CountDownLatch(2);
551	>
552	>	final PublicFutureTask task =
553	>	new PublicFutureTask(new CheckedCallable<Object>() {
554	>	public Object realCall() throws InterruptedException {
555	>	return two;
556	>	}});
557	>
558	>	Thread t1 = newStartedThread(new CheckedRunnable() {
559	>	public void realRun() throws Exception {
560	>	pleaseSet.countDown();
561	>	assertSame(two, task.get());
562	>	}});
563	>
564	>	Thread t2 = newStartedThread(new CheckedRunnable() {
565	>	public void realRun() throws Exception {
566	>	pleaseSet.countDown();
567	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
568	>	}});
569	>
570	>	await(pleaseSet);
571	>	checkNotDone(task);
572	>	assertTrue(t1.isAlive());
573	>	assertTrue(t2.isAlive());
574	>	task.set(two);
575	>	assertEquals(0, task.runCount());
576	>	assertEquals(1, task.setCount());
577	>	assertEquals(0, task.setExceptionCount());
578	>	tryToConfuseDoneTask(task);
579	>	checkCompletedNormally(task, two);
580	>	awaitTermination(t1);
581	>	awaitTermination(t2);
582		}
583
584		/**
585	<	*  Cancelling a task causes timed get in another thread to throw CancellationException
585	>	* Cancelling a task causes timed get in another thread to throw
586	>	* CancellationException
587		*/
588		public void testTimedGet_Cancellation() {
589	<	final FutureTask ft = new FutureTask(new Callable() {
590	<	public Object call() {
591	<	try {
592	<	Thread.sleep(SMALL_DELAY_MS);
593	<	threadShouldThrow();
594	<	} catch(InterruptedException e) {
595	<	}
596	<	return Boolean.TRUE;
597	<	}
598	<	});
599	<	try {
600	<	Thread t1 = new Thread(new Runnable() {
601	<	public void run() {
602	<	try {
603	<	ft.get(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
604	<	threadShouldThrow();
605	<	} catch(CancellationException success) {}
606	<	catch(Exception e){
607	<	threadUnexpectedException();
608	<	}
609	<	}
610	<	});
611	<	Thread t2 = new Thread(ft);
612	<	t1.start();
589	>	for (final boolean mayInterruptIfRunning :
590	>	new boolean[] { true, false }) {
591	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
592	>	final CountDownLatch cancelled = new CountDownLatch(1);
593	>	final PublicFutureTask task =
594	>	new PublicFutureTask(new CheckedCallable<Object>() {
595	>	public Object realCall() throws InterruptedException {
596	>	pleaseCancel.countDown();
597	>	if (mayInterruptIfRunning) {
598	>	try {
599	>	delay(2*LONG_DELAY_MS);
600	>	} catch (InterruptedException success) {}
601	>	} else {
602	>	await(cancelled);
603	>	}
604	>	return two;
605	>	}});
606	>
607	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
608	>	public void realRun() throws Exception {
609	>	pleaseCancel.countDown();
610	>	task.get();
611	>	}};
612	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
613	>	public void realRun() throws Exception {
614	>	pleaseCancel.countDown();
615	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
616	>	}};
617	>	t1.start();
618		t2.start();
619	<	Thread.sleep(SHORT_DELAY_MS);
620	<	ft.cancel(true);
621	<	t1.join();
622	<	t2.join();
623	<	} catch(InterruptedException ie){
624	<	unexpectedException();
619	>	Thread t3 = newStartedThread(task);
620	>	await(pleaseCancel);
621	>	checkIsRunning(task);
622	>	task.cancel(mayInterruptIfRunning);
623	>	checkCancelled(task);
624	>	awaitTermination(t1);
625	>	awaitTermination(t2);
626	>	cancelled.countDown();
627	>	awaitTermination(t3);
628	>	assertEquals(1, task.runCount());
629	>	assertEquals(1, task.setCount());
630	>	assertEquals(0, task.setExceptionCount());
631	>	tryToConfuseDoneTask(task);
632	>	checkCancelled(task);
633		}
634		}
635
636		/**
637	<	* Cancelling a task causes get in another thread to throw CancellationException
638	<	*/
639	<	public void testGet_Cancellation() {
640	<	final FutureTask ft = new FutureTask(new Callable() {
641	<	public Object call() {
642	<	try {
643	<	Thread.sleep(MEDIUM_DELAY_MS);
644	<	threadShouldThrow();
645	<	} catch(InterruptedException e){
646	<	}
647	<	return Boolean.TRUE;
648	<	}
649	<	});
650	<	try {
651	<	Thread t1 = new Thread(new Runnable() {
652	<	public void run() {
653	<	try {
654	<	ft.get();
655	<	threadShouldThrow();
656	<	} catch(CancellationException success){
359	<	}
360	<	catch(Exception e){
361	<	threadUnexpectedException();
362	<	}
363	<	}
364	<	});
365	<	Thread t2 = new Thread(ft);
366	<	t1.start();
367	<	t2.start();
368	<	Thread.sleep(SHORT_DELAY_MS);
369	<	ft.cancel(true);
370	<	t1.join();
371	<	t2.join();
372	<	} catch(InterruptedException success){
373	<	unexpectedException();
637	>	* A runtime exception in task causes get to throw ExecutionException
638	>	*/
639	>	public void testGet_ExecutionException() throws InterruptedException {
640	>	final ArithmeticException e = new ArithmeticException();
641	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
642	>	public Object call() {
643	>	throw e;
644	>	}});
645	>
646	>	task.run();
647	>	assertEquals(1, task.runCount());
648	>	assertEquals(0, task.setCount());
649	>	assertEquals(1, task.setExceptionCount());
650	>	try {
651	>	task.get();
652	>	shouldThrow();
653	>	} catch (ExecutionException success) {
654	>	assertSame(e, success.getCause());
655	>	tryToConfuseDoneTask(task);
656	>	checkCompletedAbnormally(task, success.getCause());
657		}
658		}
376	–
659
660		/**
661	<	* A runtime exception in task causes get to throw ExecutionException
661	>	* A runtime exception in task causes timed get to throw ExecutionException
662		*/
663	<	public void testGet_ExecutionException() {
664	<	final FutureTask ft = new FutureTask(new Callable() {
665	<	public Object call() {
666	<	int i = 5/0;
667	<	return Boolean.TRUE;
668	<	}
669	<	});
670	<	try {
671	<	ft.run();
672	<	ft.get();
673	<	shouldThrow();
674	<	} catch(ExecutionException success){
675	<	}
676	<	catch(Exception e){
677	<	unexpectedException();
396	<	}
397	<	}
398	<
399	<	/**
400	<	*  A runtime exception in task causes timed get to throw ExecutionException
401	<	*/
402	<	public void testTimedGet_ExecutionException2() {
403	<	final FutureTask ft = new FutureTask(new Callable() {
404	<	public Object call() {
405	<	int i = 5/0;
406	<	return Boolean.TRUE;
407	<	}
408	<	});
409	<	try {
410	<	ft.run();
411	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
412	<	shouldThrow();
413	<	} catch(ExecutionException success) {
414	<	} catch(TimeoutException success) { } // unlikely but OK
415	<	catch(Exception e){
416	<	unexpectedException();
417	<	}
418	<	}
419	<
420	<
421	<	/**
422	<	* Interrupting a waiting get causes it to throw InterruptedException
423	<	*/
424	<	public void testGet_InterruptedException() {
425	<	final FutureTask ft = new FutureTask(new NoOpCallable());
426	<	Thread t = new Thread(new Runnable() {
427	<	public void run() {
428	<	try {
429	<	ft.get();
430	<	threadShouldThrow();
431	<	} catch(InterruptedException success){
432	<	} catch(Exception e){
433	<	threadUnexpectedException();
434	<	}
435	<	}
436	<	});
437	<	try {
438	<	t.start();
439	<	Thread.sleep(SHORT_DELAY_MS);
440	<	t.interrupt();
441	<	t.join();
442	<	} catch(Exception e){
443	<	unexpectedException();
444	<	}
445	<	}
446	<
447	<	/**
448	<	*  Interrupting a waiting timed get causes it to throw InterruptedException
449	<	*/
450	<	public void testTimedGet_InterruptedException2() {
451	<	final FutureTask ft = new FutureTask(new NoOpCallable());
452	<	Thread t = new Thread(new Runnable() {
453	<	public void run() {
454	<	try {
455	<	ft.get(LONG_DELAY_MS,TimeUnit.MILLISECONDS);
456	<	threadShouldThrow();
457	<	} catch(InterruptedException success){}
458	<	catch(Exception e){
459	<	threadUnexpectedException();
460	<	}
461	<	}
462	<	});
463	<	try {
464	<	t.start();
465	<	Thread.sleep(SHORT_DELAY_MS);
466	<	t.interrupt();
467	<	t.join();
468	<	} catch(Exception e){
469	<	unexpectedException();
663	>	public void testTimedGet_ExecutionException2() throws Exception {
664	>	final ArithmeticException e = new ArithmeticException();
665	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
666	>	public Object call() {
667	>	throw e;
668	>	}});
669	>
670	>	task.run();
671	>	try {
672	>	task.get(LONG_DELAY_MS, MILLISECONDS);
673	>	shouldThrow();
674	>	} catch (ExecutionException success) {
675	>	assertSame(e, success.getCause());
676	>	tryToConfuseDoneTask(task);
677	>	checkCompletedAbnormally(task, success.getCause());
678		}
679		}
680	<
680	>
681	>	/**
682	>	* get is interruptible
683	>	*/
684	>	public void testGet_interruptible() {
685	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
686	>	final FutureTask task = new FutureTask(new NoOpCallable());
687	>	Thread t = newStartedThread(new CheckedRunnable() {
688	>	public void realRun() throws Exception {
689	>	Thread.currentThread().interrupt();
690	>	try {
691	>	task.get();
692	>	shouldThrow();
693	>	} catch (InterruptedException success) {}
694	>	assertFalse(Thread.interrupted());
695	>
696	>	pleaseInterrupt.countDown();
697	>	try {
698	>	task.get();
699	>	shouldThrow();
700	>	} catch (InterruptedException success) {}
701	>	assertFalse(Thread.interrupted());
702	>	}});
703	>
704	>	await(pleaseInterrupt);
705	>	t.interrupt();
706	>	awaitTermination(t);
707	>	checkNotDone(task);
708	>	}
709	>
710	>	/**
711	>	* timed get is interruptible
712	>	*/
713	>	public void testTimedGet_interruptible() {
714	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
715	>	final FutureTask task = new FutureTask(new NoOpCallable());
716	>	Thread t = newStartedThread(new CheckedRunnable() {
717	>	public void realRun() throws Exception {
718	>	Thread.currentThread().interrupt();
719	>	try {
720	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
721	>	shouldThrow();
722	>	} catch (InterruptedException success) {}
723	>	assertFalse(Thread.interrupted());
724	>
725	>	pleaseInterrupt.countDown();
726	>	try {
727	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
728	>	shouldThrow();
729	>	} catch (InterruptedException success) {}
730	>	assertFalse(Thread.interrupted());
731	>	}});
732	>
733	>	await(pleaseInterrupt);
734	>	t.interrupt();
735	>	awaitTermination(t);
736	>	checkNotDone(task);
737	>	}
738	>
739		/**
740		* A timed out timed get throws TimeoutException
741		*/
742	<	public void testGet_TimeoutException() {
743	<	try {
744	<	FutureTask ft = new FutureTask(new NoOpCallable());
745	<	ft.get(1,TimeUnit.MILLISECONDS);
746	<	shouldThrow();
747	<	} catch(TimeoutException success){}
748	<	catch(Exception success){
749	<	unexpectedException();
750	<	}
742	>	public void testGet_TimeoutException() throws Exception {
743	>	FutureTask task = new FutureTask(new NoOpCallable());
744	>	long startTime = System.nanoTime();
745	>	try {
746	>	task.get(timeoutMillis(), MILLISECONDS);
747	>	shouldThrow();
748	>	} catch (TimeoutException success) {
749	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
750	>	}
751		}
752	<
752	>
753	>	/**
754	>	* timed get with null TimeUnit throws NullPointerException
755	>	*/
756	>	public void testGet_NullTimeUnit() throws Exception {
757	>	FutureTask task = new FutureTask(new NoOpCallable());
758	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
759	>
760	>	for (long timeout : timeouts) {
761	>	try {
762	>	task.get(timeout, null);
763	>	shouldThrow();
764	>	} catch (NullPointerException success) {}
765	>	}
766	>
767	>	task.run();
768	>
769	>	for (long timeout : timeouts) {
770	>	try {
771	>	task.get(timeout, null);
772	>	shouldThrow();
773	>	} catch (NullPointerException success) {}
774	>	}
775	>	}
776	>
777		}

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