/*
* Copyright (C) 2007 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.util.concurrent.MoreExecutors.sameThreadExecutor;
import com.google.common.testing.NullPointerTester;
import com.google.common.util.concurrent.ExecutionList;
import junit.framework.TestCase;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
/**
* Unit tests for {@link ExecutionList}.
*
* @author Nishant Thakkar
* @author Sven Mawson
*/
public class ExecutionListTest extends TestCase {
protected ExecutionList list = new ExecutionList();
protected Executor exec = Executors.newCachedThreadPool();
public void testRunOnPopulatedList() throws Exception {
CountDownLatch countDownLatch = new CountDownLatch(3);
list.add(new MockRunnable(countDownLatch), exec);
list.add(new MockRunnable(countDownLatch), exec);
list.add(new MockRunnable(countDownLatch), exec);
assertEquals(countDownLatch.getCount(), 3L);
list.execute();
// Verify that all of the runnables execute in a reasonable amount of time.
assertTrue(countDownLatch.await(1L, TimeUnit.SECONDS));
}
public void testAddAfterRun() throws Exception {
// Run the previous test
testRunOnPopulatedList();
// If it passed, then verify an Add will be executed without calling run
CountDownLatch countDownLatch = new CountDownLatch(1);
list.add(new MockRunnable(countDownLatch), exec);
assertTrue(countDownLatch.await(1L, TimeUnit.SECONDS));
}
private class MockRunnable implements Runnable {
CountDownLatch countDownLatch;
MockRunnable(CountDownLatch countDownLatch) {
this.countDownLatch = countDownLatch;
}
@Override
public void run() {
countDownLatch.countDown();
}
}
public void testExceptionsCaught() {
ExecutionList list = new ExecutionList();
list.add(THROWING_RUNNABLE, sameThreadExecutor());
list.execute();
list.add(THROWING_RUNNABLE, sameThreadExecutor());
}
public void testNulls() throws Exception {
NullPointerTester tester = new NullPointerTester();
tester.setDefault(Executor.class, sameThreadExecutor());
tester.setDefault(Runnable.class, DO_NOTHING);
tester.testAllPublicInstanceMethods(new ExecutionList());
}
private static final Runnable THROWING_RUNNABLE = new Runnable() {
@Override public void run() {
throw new RuntimeException();
}
};
private static final Runnable DO_NOTHING = new Runnable() {
@Override public void run() {
}
};
}