| /* |
| * Copyright (C) 2014 The Guava Authors |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.common.util.concurrent; |
| |
| import static com.google.common.truth.Truth.assertThat; |
| import static com.google.common.util.concurrent.Callables.returning; |
| import static com.google.common.util.concurrent.Futures.getDone; |
| import static com.google.common.util.concurrent.TestPlatform.verifyThreadWasNotInterrupted; |
| |
| import com.google.common.annotations.GwtCompatible; |
| import com.google.common.annotations.GwtIncompatible; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.CancellationException; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.CyclicBarrier; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import junit.framework.TestCase; |
| |
| /** Test case for {@link TrustedListenableFutureTask}. */ |
| @GwtCompatible(emulated = true) |
| public class TrustedListenableFutureTaskTest extends TestCase { |
| |
| public void testSuccessful() throws Exception { |
| TrustedListenableFutureTask<Integer> task = TrustedListenableFutureTask.create(returning(2)); |
| assertFalse(task.isDone()); |
| task.run(); |
| assertTrue(task.isDone()); |
| assertFalse(task.isCancelled()); |
| assertEquals(2, getDone(task).intValue()); |
| } |
| |
| public void testCancelled() throws Exception { |
| TrustedListenableFutureTask<Integer> task = TrustedListenableFutureTask.create(returning(2)); |
| assertFalse(task.isDone()); |
| task.cancel(false); |
| assertTrue(task.isDone()); |
| assertTrue(task.isCancelled()); |
| assertFalse(task.wasInterrupted()); |
| try { |
| getDone(task); |
| fail(); |
| } catch (CancellationException expected) { |
| } |
| verifyThreadWasNotInterrupted(); |
| } |
| |
| public void testFailed() throws Exception { |
| final Exception e = new Exception(); |
| TrustedListenableFutureTask<Integer> task = |
| TrustedListenableFutureTask.create( |
| new Callable<Integer>() { |
| @Override |
| public Integer call() throws Exception { |
| throw e; |
| } |
| }); |
| task.run(); |
| assertTrue(task.isDone()); |
| assertFalse(task.isCancelled()); |
| try { |
| getDone(task); |
| fail(); |
| } catch (ExecutionException executionException) { |
| assertThat(executionException).hasCauseThat().isEqualTo(e); |
| } |
| } |
| |
| @GwtIncompatible // blocking wait |
| |
| public void testCancel_interrupted() throws Exception { |
| final AtomicBoolean interruptedExceptionThrown = new AtomicBoolean(); |
| final CountDownLatch enterLatch = new CountDownLatch(1); |
| final CountDownLatch exitLatch = new CountDownLatch(1); |
| final TrustedListenableFutureTask<Integer> task = |
| TrustedListenableFutureTask.create( |
| new Callable<Integer>() { |
| @Override |
| public Integer call() throws Exception { |
| enterLatch.countDown(); |
| try { |
| new CountDownLatch(1).await(); // wait forever |
| throw new AssertionError(); |
| } catch (InterruptedException e) { |
| interruptedExceptionThrown.set(true); |
| throw e; |
| } finally { |
| } |
| } |
| }); |
| assertFalse(task.isDone()); |
| Thread thread = |
| new Thread( |
| new Runnable() { |
| @Override |
| public void run() { |
| try { |
| task.run(); |
| } finally { |
| exitLatch.countDown(); |
| } |
| } |
| }); |
| thread.start(); |
| enterLatch.await(); |
| assertFalse(task.isDone()); |
| task.cancel(true); |
| assertTrue(task.isDone()); |
| assertTrue(task.isCancelled()); |
| assertTrue(task.wasInterrupted()); |
| try { |
| task.get(); |
| fail(); |
| } catch (CancellationException expected) { |
| } |
| exitLatch.await(); |
| assertTrue(interruptedExceptionThrown.get()); |
| } |
| |
| @GwtIncompatible // blocking wait |
| |
| public void testRunIdempotency() throws Exception { |
| final int numThreads = 10; |
| final ExecutorService executor = Executors.newFixedThreadPool(numThreads); |
| for (int i = 0; i < 1000; i++) { |
| final AtomicInteger counter = new AtomicInteger(); |
| final TrustedListenableFutureTask<Integer> task = |
| TrustedListenableFutureTask.create( |
| new Callable<Integer>() { |
| @Override |
| public Integer call() { |
| return counter.incrementAndGet(); |
| } |
| }); |
| final CyclicBarrier barrier = new CyclicBarrier(numThreads + 1); |
| Runnable wrapper = |
| new Runnable() { |
| @Override |
| public void run() { |
| awaitUnchecked(barrier); |
| task.run(); |
| awaitUnchecked(barrier); |
| } |
| }; |
| for (int j = 0; j < 10; j++) { |
| executor.execute(wrapper); |
| } |
| barrier.await(); // release the threads! |
| barrier.await(); // wait for them all to complete |
| assertEquals(1, task.get().intValue()); |
| assertEquals(1, counter.get()); |
| } |
| executor.shutdown(); |
| } |
| |
| @GwtIncompatible // blocking wait |
| |
| public void testToString() throws Exception { |
| final CountDownLatch enterLatch = new CountDownLatch(1); |
| final CountDownLatch exitLatch = new CountDownLatch(1); |
| final TrustedListenableFutureTask<Void> task = |
| TrustedListenableFutureTask.create( |
| new Callable<Void>() { |
| @Override |
| public Void call() throws Exception { |
| enterLatch.countDown(); |
| new CountDownLatch(1).await(); // wait forever |
| return null; |
| } |
| }); |
| assertFalse(task.isDone()); |
| Thread thread = |
| new Thread( |
| new Runnable() { |
| @Override |
| public void run() { |
| try { |
| task.run(); |
| } finally { |
| exitLatch.countDown(); |
| } |
| } |
| }, |
| "Custom thread name"); |
| thread.start(); |
| enterLatch.await(); |
| assertFalse(task.isDone()); |
| String result = task.toString(); |
| assertThat(result).contains("Custom thread name"); |
| task.cancel(true); |
| exitLatch.await(); |
| } |
| |
| @GwtIncompatible // used only in GwtIncomaptible tests |
| private void awaitUnchecked(CyclicBarrier barrier) { |
| try { |
| barrier.await(); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |