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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import static java.util.concurrent.TimeUnit.NANOSECONDS; |
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|
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import java.util.ArrayList; |
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import java.util.List; |
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import java.util.NoSuchElementException; |
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import java.util.concurrent.Callable; |
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import java.util.concurrent.CancellationException; |
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import java.util.concurrent.CountDownLatch; |
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import java.util.concurrent.ExecutionException; |
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import java.util.concurrent.Executors; |
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import java.util.concurrent.ExecutorService; |
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import java.util.concurrent.Future; |
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import java.util.concurrent.FutureTask; |
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import java.util.concurrent.TimeoutException; |
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import java.util.concurrent.atomic.AtomicInteger; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import static java.util.concurrent.TimeUnit.SECONDS; |
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import java.util.*; |
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|
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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public class FutureTaskTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run(suite()); |
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main(suite(), args); |
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} |
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public static Test suite() { |
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return new TestSuite(FutureTaskTest.class); |
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assertEquals(1, pf.doneCount()); |
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assertFalse(pf.runAndReset()); |
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assertEquals(1, pf.doneCount()); |
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Object r = null; Object exInfo = null; |
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try { |
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r = f.get(); |
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} catch (CancellationException t) { |
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exInfo = CancellationException.class; |
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} catch (ExecutionException t) { |
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exInfo = t.getCause(); |
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} catch (Throwable t) { |
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threadUnexpectedException(t); |
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} |
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|
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// Check that run and runAndReset have no effect. |
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int savedRunCount = pf.runCount(); |
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int savedSetCount = pf.setCount(); |
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int savedSetExceptionCount = pf.setExceptionCount(); |
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pf.run(); |
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pf.runAndReset(); |
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assertEquals(savedRunCount, pf.runCount()); |
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assertEquals(savedSetCount, pf.setCount()); |
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assertEquals(savedSetExceptionCount, pf.setExceptionCount()); |
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Object r2 = null; |
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try { |
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r2 = f.get(); |
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} catch (CancellationException t) { |
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assertSame(exInfo, CancellationException.class); |
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} catch (ExecutionException t) { |
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assertSame(exInfo, t.getCause()); |
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} catch (Throwable t) { |
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threadUnexpectedException(t); |
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} |
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if (exInfo == null) |
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assertSame(r, r2); |
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assertTrue(f.isDone()); |
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} |
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} |
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FutureTask ft = (FutureTask<?>) f; |
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// Check that run methods do nothing |
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ft.run(); |
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if (f instanceof PublicFutureTask) |
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assertFalse(((PublicFutureTask) f).runAndReset()); |
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if (f instanceof PublicFutureTask) { |
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PublicFutureTask pf = (PublicFutureTask) f; |
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int savedRunCount = pf.runCount(); |
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pf.run(); |
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assertFalse(pf.runAndReset()); |
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assertEquals(savedRunCount, pf.runCount()); |
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} |
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checkNotDone(f); |
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} |
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} |
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|
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<T> void checkCompletedNormally(Future<T> f, T expected) { |
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<T> void checkCompletedNormally(Future<T> f, T expectedValue) { |
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checkIsDone(f); |
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assertFalse(f.isCancelled()); |
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|
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T v1 = null, v2 = null; |
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try { |
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assertSame(expected, f.get()); |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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try { |
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assertSame(expected, f.get(5L, SECONDS)); |
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v1 = f.get(); |
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v2 = f.get(randomTimeout(), randomTimeUnit()); |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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assertSame(expectedValue, v1); |
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assertSame(expectedValue, v2); |
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} |
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|
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void checkCancelled(Future<?> f) { |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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|
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try { |
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f.get(5L, SECONDS); |
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f.get(randomTimeout(), randomTimeUnit()); |
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shouldThrow(); |
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} catch (CancellationException success) { |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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pf.set(new Object()); |
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pf.setException(new Error()); |
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for (boolean mayInterruptIfRunning : new boolean[] { true, false }) { |
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pf.cancel(true); |
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pf.cancel(mayInterruptIfRunning); |
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} |
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} |
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|
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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|
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try { |
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f.get(5L, SECONDS); |
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f.get(randomTimeout(), randomTimeUnit()); |
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shouldThrow(); |
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} catch (ExecutionException success) { |
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assertSame(t, success.getCause()); |
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for (int i = 0; i < 3; i++) { |
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assertTrue(task.runAndReset()); |
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checkNotDone(task); |
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assertEquals(i+1, task.runCount()); |
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assertEquals(i+1, task.runAndResetCount()); |
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assertEquals(i + 1, task.runCount()); |
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assertEquals(i + 1, task.runAndResetCount()); |
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assertEquals(0, task.setCount()); |
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assertEquals(0, task.setExceptionCount()); |
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} |
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for (int i = 0; i < 3; i++) { |
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assertFalse(task.runAndReset()); |
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assertEquals(0, task.runCount()); |
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assertEquals(i+1, task.runAndResetCount()); |
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assertEquals(i + 1, task.runAndResetCount()); |
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assertEquals(0, task.setCount()); |
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assertEquals(0, task.setExceptionCount()); |
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} |
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delay(LONG_DELAY_MS); |
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shouldThrow(); |
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} catch (InterruptedException success) {} |
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assertFalse(Thread.interrupted()); |
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}}); |
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Thread t = newStartedThread(task); |
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try { |
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task.cancel(true); |
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shouldThrow(); |
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} catch (SecurityException expected) {} |
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} catch (SecurityException success) {} |
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|
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// We failed to deliver the interrupt, but the world retains |
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// its sanity, as if we had done task.cancel(false) |
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final PublicFutureTask task = |
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new PublicFutureTask(new Runnable() { |
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public void run() { |
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pleaseCancel.countDown(); |
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try { |
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pleaseCancel.countDown(); |
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delay(LONG_DELAY_MS); |
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shouldThrow(); |
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} catch (Throwable t) { |
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assertTrue(t instanceof InterruptedException); |
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} |
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threadShouldThrow(); |
497 |
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} catch (InterruptedException success) { |
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} catch (Throwable t) { threadUnexpectedException(t); } |
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throw new RuntimeException(); |
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}}); |
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|
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/** |
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* get is interruptible |
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*/ |
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public void testGet_interruptible() { |
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public void testGet_Interruptible() { |
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final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
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final FutureTask task = new FutureTask(new NoOpCallable()); |
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Thread t = newStartedThread(new CheckedRunnable() { |
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/** |
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* timed get is interruptible |
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*/ |
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public void testTimedGet_interruptible() { |
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public void testTimedGet_Interruptible() { |
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final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
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final FutureTask task = new FutureTask(new NoOpCallable()); |
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Thread t = newStartedThread(new CheckedRunnable() { |
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public void realRun() throws Exception { |
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Thread.currentThread().interrupt(); |
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try { |
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task.get(2*LONG_DELAY_MS, MILLISECONDS); |
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task.get(randomTimeout(), randomTimeUnit()); |
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shouldThrow(); |
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} catch (InterruptedException success) {} |
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assertFalse(Thread.interrupted()); |
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|
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pleaseInterrupt.countDown(); |
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try { |
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task.get(2*LONG_DELAY_MS, MILLISECONDS); |
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task.get(LONGER_DELAY_MS, MILLISECONDS); |
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shouldThrow(); |
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} catch (InterruptedException success) {} |
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assertFalse(Thread.interrupted()); |
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}}); |
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|
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await(pleaseInterrupt); |
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if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
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t.interrupt(); |
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awaitTermination(t); |
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checkNotDone(task); |
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} |
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} |
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|
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/** |
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* timed get with most negative timeout works correctly (i.e. no |
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* underflow bug) |
820 |
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*/ |
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public void testGet_NegativeInfinityTimeout() throws Exception { |
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final ExecutorService pool = Executors.newFixedThreadPool(10); |
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final Runnable nop = new Runnable() { public void run() {}}; |
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final FutureTask<Void> task = new FutureTask<>(nop, null); |
825 |
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final List<Future<?>> futures = new ArrayList<>(); |
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Runnable r = new Runnable() { public void run() { |
827 |
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for (long timeout : new long[] { 0L, -1L, Long.MIN_VALUE }) { |
828 |
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try { |
829 |
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task.get(timeout, NANOSECONDS); |
830 |
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shouldThrow(); |
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} catch (TimeoutException success) { |
832 |
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} catch (Throwable fail) {threadUnexpectedException(fail);}}}}; |
833 |
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for (int i = 0; i < 10; i++) |
834 |
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futures.add(pool.submit(r)); |
835 |
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try { |
836 |
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joinPool(pool); |
837 |
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for (Future<?> future : futures) |
838 |
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checkCompletedNormally(future, null); |
839 |
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} finally { |
840 |
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task.run(); // last resort to help terminate |
841 |
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} |
842 |
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} |
843 |
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|
844 |
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/** |
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* toString indicates current completion state |
846 |
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*/ |
847 |
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public void testToString_incomplete() { |
848 |
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FutureTask<String> f = new FutureTask<>(() -> ""); |
849 |
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assertTrue(f.toString().matches(".*\\[.*Not completed.*\\]")); |
850 |
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if (testImplementationDetails) |
851 |
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assertTrue(f.toString().startsWith( |
852 |
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identityString(f) + "[Not completed, task =")); |
853 |
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} |
854 |
+ |
|
855 |
+ |
public void testToString_normal() { |
856 |
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FutureTask<String> f = new FutureTask<>(() -> ""); |
857 |
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f.run(); |
858 |
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assertTrue(f.toString().matches(".*\\[.*Completed normally.*\\]")); |
859 |
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if (testImplementationDetails) |
860 |
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assertEquals(identityString(f) + "[Completed normally]", |
861 |
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f.toString()); |
862 |
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} |
863 |
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|
864 |
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public void testToString_exception() { |
865 |
+ |
FutureTask<String> f = new FutureTask<>( |
866 |
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() -> { throw new ArithmeticException(); }); |
867 |
+ |
f.run(); |
868 |
+ |
assertTrue(f.toString().matches(".*\\[.*Completed exceptionally.*\\]")); |
869 |
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if (testImplementationDetails) |
870 |
+ |
assertTrue(f.toString().startsWith( |
871 |
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identityString(f) + "[Completed exceptionally: ")); |
872 |
+ |
} |
873 |
+ |
|
874 |
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public void testToString_cancelled() { |
875 |
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for (boolean mayInterruptIfRunning : new boolean[] { true, false }) { |
876 |
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FutureTask<String> f = new FutureTask<>(() -> ""); |
877 |
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assertTrue(f.cancel(mayInterruptIfRunning)); |
878 |
+ |
assertTrue(f.toString().matches(".*\\[.*Cancelled.*\\]")); |
879 |
+ |
if (testImplementationDetails) |
880 |
+ |
assertEquals(identityString(f) + "[Cancelled]", |
881 |
+ |
f.toString()); |
882 |
+ |
} |
883 |
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} |
884 |
+ |
|
885 |
|
} |