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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 1.35 by jsr166, Mon Jan 14 21:54:42 2013 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	<	/**
32	<	* Subclass to expose protected methods
33	<	*/
34	<	static class MyFutureTask extends FutureTask {
35	<	public MyFutureTask(Callable r) { super(r); }
36	<	public boolean reset() { return super.reset(); }
37	<	public void setCancelled() { super.setCancelled(); }
38	<	public void setDone() { super.setDone(); }
39	<	public void set(Object x) { super.set(x); }
40	<	public void setException(Throwable t) { super.setException(t); }
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	<	public void testConstructor(){
55	<	try {
56	<	FutureTask task = new FutureTask(null);
57	<	fail("should throw");
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	<	catch(NullPointerException success) {
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	<	public void testConstructor2(){
77	>	<T> void checkCompletedNormally(Future<T> f, T expected) {
78	>	checkIsDone(f);
79	>	assertFalse(f.isCancelled());
80	>
81		try {
82	<	FutureTask task = new FutureTask(null, Boolean.TRUE);
83	<	fail("should throw");
84	<	}
85	<	catch(NullPointerException success) {
86	<	}
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	<	public void testIsDone(){
90	<	FutureTask task = new FutureTask( new NoOpCallable());
91	<	task.run();
92	<	assertTrue(task.isDone());
93	<	assertFalse(task.isCancelled());
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	<	public void testReset(){
107	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
108	<	task.run();
109	<	assertTrue(task.isDone());
110	<	assertTrue(task.reset());
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	<	public void testResetAfterCancel() {
115	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
116	<	assertTrue(task.cancel(false));
117	<	task.run();
118	<	assertTrue(task.isDone());
119	<	assertTrue(task.isCancelled());
120	<	assertFalse(task.reset());
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	<	public void testSetDone() {
134	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
135	<	task.setDone();
136	<	assertTrue(task.isDone());
137	<	assertFalse(task.isCancelled());
133	>	/**
134	>	* Subclass to expose protected methods
135	>	*/
136	>	static class PublicFutureTask extends FutureTask {
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	<	public void testSetCancelled() {
195	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
196	<	assertTrue(task.cancel(false));
197	<	task.setCancelled();
198	<	assertTrue(task.isDone());
199	<	assertTrue(task.isCancelled());
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	<	public void testSet() {
203	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
204	<	task.set(one);
202	>	/**
203	>	* creating a future with a null callable throws NullPointerException
204	>	*/
205	>	public void testConstructor() {
206		try {
207	<	assertEquals(task.get(), one);
207	>	new FutureTask(null);
208	>	shouldThrow();
209	>	} catch (NullPointerException success) {}
210	>	}
211	>
212	>	/**
213	>	* creating a future with null runnable throws NullPointerException
214	>	*/
215	>	public void testConstructor2() {
216	>	try {
217	>	new FutureTask(null, Boolean.TRUE);
218	>	shouldThrow();
219	>	} catch (NullPointerException success) {}
220	>	}
221	>
222	>	/**
223	>	* isDone is true when a task completes
224	>	*/
225	>	public void testIsDone() {
226	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
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	>	* runAndReset of a non-cancelled task succeeds
236	>	*/
237	>	public void testRunAndReset() {
238	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
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	<	catch(Exception e) {
248	<	fail("unexpected exception");
247	>	}
248	>
249	>	/**
250	>	* runAndReset after cancellation fails
251	>	*/
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	<	public void testSetException() {
268	>	/**
269	>	* setting value causes get to return it
270	>	*/
271	>	public void testSet() throws Exception {
272	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
273	>	task.set(one);
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_get() throws Exception {
288		Exception nse = new NoSuchElementException();
289	<	MyFutureTask task = new MyFutureTask(new NoOpCallable());
289	>	PublicFutureTask task = new PublicFutureTask(new NoOpCallable());
290		task.setException(nse);
291	+
292		try {
293	<	Object x = task.get();
294	<	fail("should throw");
295	<	}
296	<	catch(ExecutionException ee) {
297	<	Throwable cause = ee.getCause();
110	<	assertEquals(cause, nse);
293	>	task.get();
294	>	shouldThrow();
295	>	} catch (ExecutionException success) {
296	>	assertSame(nse, success.getCause());
297	>	checkCompletedAbnormally(task, nse);
298		}
299	<	catch(Exception e) {
300	<	fail("unexpected exception");
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	+	* 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
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(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	<	public void testCancelInterrupt(){
365	<	FutureTask task = new FutureTask( new Callable() {
366	<	public Object call() {
364	>	/**
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	>	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	<	threadFail("should throw");
391	<	}
392	<	catch (InterruptedException success) {}
393	<	return Boolean.TRUE;
394	<	} });
395	<	Thread t = new  Thread(task);
396	<	t.start();
397	<
398	<	try{
399	<	Thread.sleep(SHORT_DELAY_MS);
400	<	assertTrue(task.cancel(true));
401	<	t.join();
402	<	assertTrue(task.isDone());
403	<	assertTrue(task.isCancelled());
404	<	} catch(InterruptedException e){
161	<	fail("unexpected exception");
162	<	}
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	+
431	+	await(pleaseCancel);
432	+	try {
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	<	public void testCancelNoInterrupt(){
454	<	FutureTask task = new FutureTask( new Callable() {
455	<	public Object call() {
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	<	Thread.sleep(MEDIUM_DELAY_MS);
463	<	}
464	<	catch (InterruptedException success) {
465	<	threadFail("should not interrupt");
462	>	pleaseCancel.countDown();
463	>	delay(LONG_DELAY_MS);
464	>	shouldThrow();
465	>	} catch (Throwable t) {
466	>	assertTrue(t instanceof InterruptedException);
467		}
468	<	return Boolean.TRUE;
469	<	} });
470	<	Thread t = new  Thread(task);
471	<	t.start();
472	<
473	<	try{
474	<	Thread.sleep(SHORT_DELAY_MS);
475	<	assertTrue(task.cancel(false));
476	<	t.join();
477	<	assertTrue(task.isDone());
478	<	assertTrue(task.isCancelled());
479	<	} catch(InterruptedException e){
480	<	fail("unexpected exception");
188	<	}
468	>	throw new RuntimeException();
469	>	}});
470	>
471	>	Thread t = newStartedThread(task);
472	>	await(pleaseCancel);
473	>	assertTrue(task.cancel(true));
474	>	assertTrue(task.isCancelled());
475	>	awaitTermination(t);
476	>	assertEquals(1, task.runCount());
477	>	assertEquals(0, task.setCount());
478	>	assertEquals(1, task.setExceptionCount());
479	>	tryToConfuseDoneTask(task);
480	>	checkCancelled(task);
481		}
482
483	<	public void testGet1() {
484	<	final FutureTask ft = new FutureTask(new Callable(){
485	<	public Object call(){
486	<	try{
487	<	Thread.sleep(MEDIUM_DELAY_MS);
488	<	} catch(InterruptedException e){
489	<	threadFail("unexpected exception");
490	<	}
491	<	return Boolean.TRUE;
492	<	}
493	<	});
494	<	Thread t = new Thread(new Runnable(){
203	<	public void run(){
204	<	try{
205	<	ft.get();
206	<	} catch(Exception e){
207	<	threadFail("unexpected exception");
208	<	}
209	<	}
210	<	});
211	<	try{
212	<	assertFalse(ft.isDone());
213	<	assertFalse(ft.isCancelled());
214	<	t.start();
215	<	Thread.sleep(SHORT_DELAY_MS);
216	<	ft.run();
217	<	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	<	}
483	>	/**
484	>	* cancel(false) does not interrupt a running task
485	>	*/
486	>	public void testCancelNoInterrupt() {
487	>	final CountDownLatch pleaseCancel = new CountDownLatch(1);
488	>	final CountDownLatch cancelled = new CountDownLatch(1);
489	>	final PublicFutureTask task =
490	>	new PublicFutureTask(new CheckedCallable<Boolean>() {
491	>	public Boolean realCall() {
492	>	pleaseCancel.countDown();
493	>	await(cancelled);
494	>	assertFalse(Thread.interrupted());
495		return Boolean.TRUE;
496	<	}
497	<	});
498	<	Thread t = new Thread(new Runnable(){
499	<	public void run(){
500	<	try{
501	<	ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
502	<	} catch(TimeoutException success) {
503	<	} catch(Exception e){
504	<	threadFail("unexpected exception");
505	<	}
506	<	}
507	<	});
508	<	try{
509	<	assertFalse(ft.isDone());
510	<	assertFalse(ft.isCancelled());
511	<	t.start();
512	<	ft.run();
513	<	t.join();
514	<	assertTrue(ft.isDone());
515	<	assertFalse(ft.isCancelled());
516	<	} catch(InterruptedException e){
517	<	fail("unexpected exception");
518	<
519	<	}
496	>	}});
497	>
498	>	Thread t = newStartedThread(task);
499	>	await(pleaseCancel);
500	>	assertTrue(task.cancel(false));
501	>	assertTrue(task.isCancelled());
502	>	cancelled.countDown();
503	>	awaitTermination(t);
504	>	assertEquals(1, task.runCount());
505	>	assertEquals(1, task.setCount());
506	>	assertEquals(0, task.setExceptionCount());
507	>	tryToConfuseDoneTask(task);
508	>	checkCancelled(task);
509	>	}
510	>
511	>	/**
512	>	* run in one thread causes get in another thread to retrieve value
513	>	*/
514	>	public void testGetRun() {
515	>	final CountDownLatch pleaseRun = new CountDownLatch(2);
516	>
517	>	final PublicFutureTask task =
518	>	new PublicFutureTask(new CheckedCallable<Object>() {
519	>	public Object realCall() {
520	>	return two;
521	>	}});
522	>
523	>	Thread t1 = newStartedThread(new CheckedRunnable() {
524	>	public void realRun() throws Exception {
525	>	pleaseRun.countDown();
526	>	assertSame(two, task.get());
527	>	}});
528	>
529	>	Thread t2 = newStartedThread(new CheckedRunnable() {
530	>	public void realRun() throws Exception {
531	>	pleaseRun.countDown();
532	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
533	>	}});
534	>
535	>	await(pleaseRun);
536	>	checkNotDone(task);
537	>	assertTrue(t1.isAlive());
538	>	assertTrue(t2.isAlive());
539	>	task.run();
540	>	checkCompletedNormally(task, two);
541	>	assertEquals(1, task.runCount());
542	>	assertEquals(1, task.setCount());
543	>	assertEquals(0, task.setExceptionCount());
544	>	awaitTermination(t1);
545	>	awaitTermination(t2);
546	>	tryToConfuseDoneTask(task);
547	>	checkCompletedNormally(task, two);
548		}
549
550	+	/**
551	+	* set in one thread causes get in another thread to retrieve value
552	+	*/
553	+	public void testGetSet() {
554	+	final CountDownLatch pleaseSet = new CountDownLatch(2);
555
556	<	public void testGet_Cancellation(){
557	<	final FutureTask ft = new FutureTask(new Callable(){
558	<	public Object call(){
559	<	try{
560	<	Thread.sleep(MEDIUM_DELAY_MS);
561	<	} catch(InterruptedException e){
562	<	threadFail("unexpected exception");
563	<	}
564	<	return Boolean.TRUE;
565	<	}
566	<	});
567	<	try {
568	<	Thread.sleep(SHORT_DELAY_MS);
569	<	Thread t = new Thread(new Runnable(){
570	<	public void run(){
571	<	try{
572	<	ft.get();
573	<	threadFail("should throw");
574	<	} catch(CancellationException success){
575	<	}
576	<	catch(Exception e){
577	<	threadFail("unexpected exception");
556	>	final PublicFutureTask task =
557	>	new PublicFutureTask(new CheckedCallable<Object>() {
558	>	public Object realCall() throws InterruptedException {
559	>	return two;
560	>	}});
561	>
562	>	Thread t1 = newStartedThread(new CheckedRunnable() {
563	>	public void realRun() throws Exception {
564	>	pleaseSet.countDown();
565	>	assertSame(two, task.get());
566	>	}});
567	>
568	>	Thread t2 = newStartedThread(new CheckedRunnable() {
569	>	public void realRun() throws Exception {
570	>	pleaseSet.countDown();
571	>	assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS));
572	>	}});
573	>
574	>	await(pleaseSet);
575	>	checkNotDone(task);
576	>	assertTrue(t1.isAlive());
577	>	assertTrue(t2.isAlive());
578	>	task.set(two);
579	>	assertEquals(0, task.runCount());
580	>	assertEquals(1, task.setCount());
581	>	assertEquals(0, task.setExceptionCount());
582	>	tryToConfuseDoneTask(task);
583	>	checkCompletedNormally(task, two);
584	>	awaitTermination(t1);
585	>	awaitTermination(t2);
586	>	}
587	>
588	>	/**
589	>	* Cancelling a task causes timed get in another thread to throw
590	>	* CancellationException
591	>	*/
592	>	public void testTimedGet_Cancellation() {
593	>	for (final boolean mayInterruptIfRunning :
594	>	new boolean[] { true, false }) {
595	>	final CountDownLatch pleaseCancel = new CountDownLatch(3);
596	>	final CountDownLatch cancelled = new CountDownLatch(1);
597	>	final PublicFutureTask task =
598	>	new PublicFutureTask(new CheckedCallable<Object>() {
599	>	public Object realCall() throws InterruptedException {
600	>	pleaseCancel.countDown();
601	>	if (mayInterruptIfRunning) {
602	>	try {
603	>	delay(2*LONG_DELAY_MS);
604	>	} catch (InterruptedException success) {}
605	>	} else {
606	>	await(cancelled);
607		}
608	<	}
609	<	});
610	<	t.start();
611	<	ft.cancel(true);
612	<	t.join();
613	<	} catch(InterruptedException success){
614	<	fail("unexpected exception");
615	<	}
616	<	}
617	<
618	<	public void testGet_Cancellation2(){
619	<	final FutureTask ft = new FutureTask(new Callable(){
620	<	public Object call(){
621	<	try{
622	<	Thread.sleep(SHORT_DELAY_MS);
623	<	} catch(InterruptedException e) {
624	<	threadFail("unexpected exception");
625	<	}
626	<	return Boolean.TRUE;
627	<	}
628	<	});
629	<	try{
630	<	Thread.sleep(SHORT_DELAY_MS);
631	<	Thread t = new Thread(new Runnable(){
632	<	public void run(){
633	<	try{
634	<	ft.get(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
635	<	threadFail("should throw");
636	<	} catch(CancellationException success) {}
637	<	catch(Exception e){
638	<	threadFail("unexpected exception");
639	<	}
640	<	}
641	<	});
642	<	t.start();
643	<	Thread.sleep(SHORT_DELAY_MS);
644	<	ft.cancel(true);
645	<	Thread.sleep(SHORT_DELAY_MS);
646	<	t.join();
647	<	} catch(InterruptedException ie){
648	<	fail("unexpected exception");
649	<	}
650	<	}
651	<
652	<	public void testGet_ExecutionException(){
653	<	final FutureTask ft = new FutureTask(new Callable(){
654	<	public Object call(){
655	<	int i = 5/0;
656	<	return Boolean.TRUE;
657	<	}
658	<	});
659	<	try{
660	<	ft.run();
661	<	ft.get();
662	<	fail("should throw");
663	<	} catch(ExecutionException success){
664	<	}
665	<	catch(Exception e){
666	<	fail("unexpected exception");
667	<	}
668	<	}
669	<
670	<	public void testTimedGet_ExecutionException2(){
671	<	final FutureTask ft = new FutureTask(new Callable(){
672	<	public Object call(){
673	<	int i = 5/0;
674	<	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	<	});
608	>	return two;
609	>	}});
610	>
611	>	Thread t1 = new ThreadShouldThrow(CancellationException.class) {
612	>	public void realRun() throws Exception {
613	>	pleaseCancel.countDown();
614	>	task.get();
615	>	}};
616	>	Thread t2 = new ThreadShouldThrow(CancellationException.class) {
617	>	public void realRun() throws Exception {
618	>	pleaseCancel.countDown();
619	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
620	>	}};
621	>	t1.start();
622	>	t2.start();
623	>	Thread t3 = newStartedThread(task);
624	>	await(pleaseCancel);
625	>	checkIsRunning(task);
626	>	task.cancel(mayInterruptIfRunning);
627	>	checkCancelled(task);
628	>	awaitTermination(t1);
629	>	awaitTermination(t2);
630	>	cancelled.countDown();
631	>	awaitTermination(t3);
632	>	assertEquals(1, task.runCount());
633	>	assertEquals(1, task.setCount());
634	>	assertEquals(0, task.setExceptionCount());
635	>	tryToConfuseDoneTask(task);
636	>	checkCancelled(task);
637	>	}
638	>	}
639	>
640	>	/**
641	>	* A runtime exception in task causes get to throw ExecutionException
642	>	*/
643	>	public void testGet_ExecutionException() throws InterruptedException {
644	>	final ArithmeticException e = new ArithmeticException();
645	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
646	>	public Object call() {
647	>	throw e;
648	>	}});
649	>
650	>	task.run();
651	>	assertEquals(1, task.runCount());
652	>	assertEquals(0, task.setCount());
653	>	assertEquals(1, task.setExceptionCount());
654	>	try {
655	>	task.get();
656	>	shouldThrow();
657	>	} catch (ExecutionException success) {
658	>	assertSame(e, success.getCause());
659	>	tryToConfuseDoneTask(task);
660	>	checkCompletedAbnormally(task, success.getCause());
661	>	}
662	>	}
663	>
664	>	/**
665	>	* A runtime exception in task causes timed get to throw ExecutionException
666	>	*/
667	>	public void testTimedGet_ExecutionException2() throws Exception {
668	>	final ArithmeticException e = new ArithmeticException();
669	>	final PublicFutureTask task = new PublicFutureTask(new Callable() {
670	>	public Object call() {
671	>	throw e;
672	>	}});
673	>
674	>	task.run();
675		try {
676	<	t.start();
677	<	Thread.sleep(SHORT_DELAY_MS);
678	<	t.interrupt();
679	<	t.join();
680	<	} catch(Exception e){
681	<	fail("unexpected exception");
676	>	task.get(LONG_DELAY_MS, MILLISECONDS);
677	>	shouldThrow();
678	>	} catch (ExecutionException success) {
679	>	assertSame(e, success.getCause());
680	>	tryToConfuseDoneTask(task);
681	>	checkCompletedAbnormally(task, success.getCause());
682		}
683		}
684
685	<	public void testTimedGet_InterruptedException2(){
686	<	final FutureTask ft = new FutureTask(new NoOpCallable());
687	<	Thread t = new Thread(new Runnable(){
688	<	public void run(){
689	<	try{
690	<	ft.get(LONG_DELAY_MS,TimeUnit.MILLISECONDS);
691	<	threadFail("should throw");
692	<	} catch(InterruptedException success){}
693	<	catch(Exception e){
694	<	threadFail("unexpected exception");
695	<	}
696	<	}
697	<	});
698	<	try {
699	<	t.start();
700	<	Thread.sleep(SHORT_DELAY_MS);
701	<	t.interrupt();
702	<	t.join();
703	<	} catch(Exception e){
704	<	fail("unexpected exception");
705	<	}
706	<	}
707	<
708	<	public void testGet_TimeoutException(){
709	<	try{
710	<	FutureTask ft = new FutureTask(new NoOpCallable());
711	<	ft.get(1,TimeUnit.MILLISECONDS);
712	<	fail("should throw");
713	<	} catch(TimeoutException success){}
714	<	catch(Exception success){
715	<	fail("unexpected exception");
716	<	}
685	>	/**
686	>	* get is interruptible
687	>	*/
688	>	public void testGet_interruptible() {
689	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
690	>	final FutureTask task = new FutureTask(new NoOpCallable());
691	>	Thread t = newStartedThread(new CheckedRunnable() {
692	>	public void realRun() throws Exception {
693	>	Thread.currentThread().interrupt();
694	>	try {
695	>	task.get();
696	>	shouldThrow();
697	>	} catch (InterruptedException success) {}
698	>	assertFalse(Thread.interrupted());
699	>
700	>	pleaseInterrupt.countDown();
701	>	try {
702	>	task.get();
703	>	shouldThrow();
704	>	} catch (InterruptedException success) {}
705	>	assertFalse(Thread.interrupted());
706	>	}});
707	>
708	>	await(pleaseInterrupt);
709	>	t.interrupt();
710	>	awaitTermination(t);
711	>	checkNotDone(task);
712	>	}
713	>
714	>	/**
715	>	* timed get is interruptible
716	>	*/
717	>	public void testTimedGet_interruptible() {
718	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
719	>	final FutureTask task = new FutureTask(new NoOpCallable());
720	>	Thread t = newStartedThread(new CheckedRunnable() {
721	>	public void realRun() throws Exception {
722	>	Thread.currentThread().interrupt();
723	>	try {
724	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
725	>	shouldThrow();
726	>	} catch (InterruptedException success) {}
727	>	assertFalse(Thread.interrupted());
728	>
729	>	pleaseInterrupt.countDown();
730	>	try {
731	>	task.get(2*LONG_DELAY_MS, MILLISECONDS);
732	>	shouldThrow();
733	>	} catch (InterruptedException success) {}
734	>	assertFalse(Thread.interrupted());
735	>	}});
736	>
737	>	await(pleaseInterrupt);
738	>	t.interrupt();
739	>	awaitTermination(t);
740	>	checkNotDone(task);
741	>	}
742	>
743	>	/**
744	>	* A timed out timed get throws TimeoutException
745	>	*/
746	>	public void testGet_TimeoutException() throws Exception {
747	>	FutureTask task = new FutureTask(new NoOpCallable());
748	>	long startTime = System.nanoTime();
749	>	try {
750	>	task.get(timeoutMillis(), MILLISECONDS);
751	>	shouldThrow();
752	>	} catch (TimeoutException success) {
753	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
754	>	}
755		}
756	<
756	>
757	>	/**
758	>	* timed get with null TimeUnit throws NullPointerException
759	>	*/
760	>	public void testGet_NullTimeUnit() throws Exception {
761	>	FutureTask task = new FutureTask(new NoOpCallable());
762	>	long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE };
763	>
764	>	for (long timeout : timeouts) {
765	>	try {
766	>	task.get(timeout, null);
767	>	shouldThrow();
768	>	} catch (NullPointerException success) {}
769	>	}
770	>
771	>	task.run();
772	>
773	>	for (long timeout : timeouts) {
774	>	try {
775	>	task.get(timeout, null);
776	>	shouldThrow();
777	>	} catch (NullPointerException success) {}
778	>	}
779	>	}
780	>
781		}

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