| /* |
| * Written by Doug Lea with assistance from members of JCP JSR-166 |
| * Expert Group and released to the public domain, as explained at |
| * http://creativecommons.org/licenses/publicdomain |
| * Other contributors include Andrew Wright, Jeffrey Hayes, |
| * Pat Fisher, Mike Judd. |
| */ |
| |
| package tests.api.java.util.concurrent; // android-added |
| |
| import junit.framework.*; |
| import java.util.concurrent.*; |
| import static java.util.concurrent.TimeUnit.MILLISECONDS; |
| import java.util.*; |
| |
| public class FutureTaskTest extends JSR166TestCase { |
| public static Test suite() { |
| return new TestSuite(FutureTaskTest.class); |
| } |
| |
| /** |
| * Subclass to expose protected methods |
| */ |
| static class PublicFutureTask extends FutureTask { |
| public PublicFutureTask(Callable r) { super(r); } |
| public boolean runAndReset() { return super.runAndReset(); } |
| public void set(Object x) { super.set(x); } |
| public void setException(Throwable t) { super.setException(t); } |
| } |
| |
| /** |
| * Creating a future with a null callable throws NPE |
| */ |
| public void testConstructor() { |
| try { |
| FutureTask task = new FutureTask(null); |
| shouldThrow(); |
| } catch (NullPointerException success) {} |
| } |
| |
| /** |
| * creating a future with null runnable fails |
| */ |
| public void testConstructor2() { |
| try { |
| FutureTask task = new FutureTask(null, Boolean.TRUE); |
| shouldThrow(); |
| } catch (NullPointerException success) {} |
| } |
| |
| /** |
| * isDone is true when a task completes |
| */ |
| public void testIsDone() { |
| FutureTask task = new FutureTask(new NoOpCallable()); |
| task.run(); |
| assertTrue(task.isDone()); |
| assertFalse(task.isCancelled()); |
| } |
| |
| /** |
| * runAndReset of a non-cancelled task succeeds |
| */ |
| public void testRunAndReset() { |
| PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
| assertTrue(task.runAndReset()); |
| assertFalse(task.isDone()); |
| } |
| |
| /** |
| * runAndReset after cancellation fails |
| */ |
| public void testResetAfterCancel() { |
| PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
| assertTrue(task.cancel(false)); |
| assertFalse(task.runAndReset()); |
| assertTrue(task.isDone()); |
| assertTrue(task.isCancelled()); |
| } |
| |
| |
| |
| /** |
| * setting value causes get to return it |
| */ |
| public void testSet() throws Exception { |
| PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
| task.set(one); |
| assertSame(task.get(), one); |
| } |
| |
| /** |
| * setException causes get to throw ExecutionException |
| */ |
| public void testSetException() throws Exception { |
| Exception nse = new NoSuchElementException(); |
| PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
| task.setException(nse); |
| try { |
| Object x = task.get(); |
| shouldThrow(); |
| } catch (ExecutionException success) { |
| assertSame(success.getCause(), nse); |
| } |
| } |
| |
| /** |
| * Cancelling before running succeeds |
| */ |
| public void testCancelBeforeRun() { |
| FutureTask task = new FutureTask(new NoOpCallable()); |
| assertTrue(task.cancel(false)); |
| task.run(); |
| assertTrue(task.isDone()); |
| assertTrue(task.isCancelled()); |
| } |
| |
| /** |
| * Cancel(true) before run succeeds |
| */ |
| public void testCancelBeforeRun2() { |
| FutureTask task = new FutureTask(new NoOpCallable()); |
| assertTrue(task.cancel(true)); |
| task.run(); |
| assertTrue(task.isDone()); |
| assertTrue(task.isCancelled()); |
| } |
| |
| /** |
| * cancel of a completed task fails |
| */ |
| public void testCancelAfterRun() { |
| FutureTask task = new FutureTask(new NoOpCallable()); |
| task.run(); |
| assertFalse(task.cancel(false)); |
| assertTrue(task.isDone()); |
| assertFalse(task.isCancelled()); |
| } |
| |
| /** |
| * cancel(true) interrupts a running task |
| */ |
| public void testCancelInterrupt() throws InterruptedException { |
| final FutureTask task = |
| new FutureTask(new CheckedInterruptedCallable<Object>() { |
| public Object realCall() throws InterruptedException { |
| Thread.sleep(SMALL_DELAY_MS); |
| return Boolean.TRUE; |
| }}); |
| |
| Thread t = new Thread(task); |
| t.start(); |
| Thread.sleep(SHORT_DELAY_MS); |
| assertTrue(task.cancel(true)); |
| t.join(); |
| assertTrue(task.isDone()); |
| assertTrue(task.isCancelled()); |
| } |
| |
| |
| /** |
| * cancel(false) does not interrupt a running task |
| */ |
| public void testCancelNoInterrupt() throws InterruptedException { |
| final FutureTask task = |
| new FutureTask(new CheckedCallable<Object>() { |
| public Object realCall() throws InterruptedException { |
| Thread.sleep(MEDIUM_DELAY_MS); |
| return Boolean.TRUE; |
| }}); |
| |
| Thread t = new Thread(task); |
| t.start(); |
| Thread.sleep(SHORT_DELAY_MS); |
| assertTrue(task.cancel(false)); |
| t.join(); |
| assertTrue(task.isDone()); |
| assertTrue(task.isCancelled()); |
| } |
| |
| /** |
| * set in one thread causes get in another thread to retrieve value |
| */ |
| public void testGet1() throws InterruptedException { |
| final FutureTask ft = |
| new FutureTask(new CheckedCallable<Object>() { |
| public Object realCall() throws InterruptedException { |
| return Boolean.TRUE; |
| }}); |
| Thread t = new Thread(new CheckedRunnable() { |
| public void realRun() throws Exception { |
| assertSame(Boolean.TRUE, ft.get()); |
| }}); |
| |
| assertFalse(ft.isDone()); |
| assertFalse(ft.isCancelled()); |
| t.start(); |
| Thread.sleep(SHORT_DELAY_MS); |
| ft.run(); |
| t.join(); |
| assertTrue(ft.isDone()); |
| assertFalse(ft.isCancelled()); |
| } |
| |
| /** |
| * set in one thread causes timed get in another thread to retrieve value |
| */ |
| public void testTimedGet1() throws InterruptedException { |
| final FutureTask ft = |
| new FutureTask(new CheckedCallable<Object>() { |
| public Object realCall() throws InterruptedException { |
| return Boolean.TRUE; |
| }}); |
| Thread t = new Thread(new CheckedRunnable() { |
| public void realRun() throws Exception { |
| assertSame(Boolean.TRUE, ft.get(SMALL_DELAY_MS, MILLISECONDS)); |
| }}); |
| |
| assertFalse(ft.isDone()); |
| assertFalse(ft.isCancelled()); |
| t.start(); |
| Thread.sleep(SHORT_DELAY_MS); |
| ft.run(); |
| t.join(); |
| assertTrue(ft.isDone()); |
| assertFalse(ft.isCancelled()); |
| } |
| |
| /** |
| * Cancelling a task causes timed get in another thread to throw CancellationException |
| */ |
| public void testTimedGet_Cancellation() throws InterruptedException { |
| final FutureTask ft = |
| new FutureTask(new CheckedInterruptedCallable<Object>() { |
| public Object realCall() throws InterruptedException { |
| Thread.sleep(SMALL_DELAY_MS); |
| return Boolean.TRUE; |
| }}); |
| |
| Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
| public void realRun() throws Exception { |
| ft.get(MEDIUM_DELAY_MS, MILLISECONDS); |
| }}; |
| Thread t2 = new Thread(ft); |
| t1.start(); |
| t2.start(); |
| Thread.sleep(SHORT_DELAY_MS); |
| ft.cancel(true); |
| t1.join(); |
| t2.join(); |
| } |
| |
| /** |
| * Cancelling a task causes get in another thread to throw CancellationException |
| */ |
| public void testGet_Cancellation() throws InterruptedException { |
| final FutureTask ft = |
| new FutureTask(new CheckedInterruptedCallable<Object>() { |
| public Object realCall() throws InterruptedException { |
| Thread.sleep(SMALL_DELAY_MS); |
| return Boolean.TRUE; |
| }}); |
| Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
| public void realRun() throws Exception { |
| ft.get(); |
| }}; |
| |
| Thread t2 = new Thread(ft); |
| t1.start(); |
| t2.start(); |
| Thread.sleep(SHORT_DELAY_MS); |
| ft.cancel(true); |
| t1.join(); |
| t2.join(); |
| } |
| |
| |
| /** |
| * A runtime exception in task causes get to throw ExecutionException |
| */ |
| public void testGet_ExecutionException() throws InterruptedException { |
| final FutureTask ft = new FutureTask(new Callable() { |
| public Object call() { |
| return 5/0; |
| }}); |
| |
| ft.run(); |
| try { |
| ft.get(); |
| shouldThrow(); |
| } catch (ExecutionException success) { |
| assertTrue(success.getCause() instanceof ArithmeticException); |
| } |
| } |
| |
| /** |
| * A runtime exception in task causes timed get to throw ExecutionException |
| */ |
| public void testTimedGet_ExecutionException2() throws Exception { |
| final FutureTask ft = new FutureTask(new Callable() { |
| public Object call() { |
| return 5/0; |
| }}); |
| |
| ft.run(); |
| try { |
| ft.get(SHORT_DELAY_MS, MILLISECONDS); |
| shouldThrow(); |
| } catch (ExecutionException success) { |
| assertTrue(success.getCause() instanceof ArithmeticException); |
| } |
| } |
| |
| |
| /** |
| * Interrupting a waiting get causes it to throw InterruptedException |
| */ |
| public void testGet_InterruptedException() throws InterruptedException { |
| final FutureTask ft = new FutureTask(new NoOpCallable()); |
| Thread t = new Thread(new CheckedInterruptedRunnable() { |
| public void realRun() throws Exception { |
| ft.get(); |
| }}); |
| |
| t.start(); |
| Thread.sleep(SHORT_DELAY_MS); |
| t.interrupt(); |
| t.join(); |
| } |
| |
| /** |
| * Interrupting a waiting timed get causes it to throw InterruptedException |
| */ |
| public void testTimedGet_InterruptedException2() throws InterruptedException { |
| final FutureTask ft = new FutureTask(new NoOpCallable()); |
| Thread t = new Thread(new CheckedInterruptedRunnable() { |
| public void realRun() throws Exception { |
| ft.get(LONG_DELAY_MS,MILLISECONDS); |
| }}); |
| |
| t.start(); |
| Thread.sleep(SHORT_DELAY_MS); |
| t.interrupt(); |
| t.join(); |
| } |
| |
| /** |
| * A timed out timed get throws TimeoutException |
| */ |
| public void testGet_TimeoutException() throws Exception { |
| try { |
| FutureTask ft = new FutureTask(new NoOpCallable()); |
| ft.get(1,MILLISECONDS); |
| shouldThrow(); |
| } catch (TimeoutException success) {} |
| } |
| |
| } |