/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.openejb.observer;
import org.apache.openejb.observer.event.ObserverAdded;
import org.apache.openejb.observer.event.ObserverRemoved;
import org.junit.Assert;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
import static org.apache.openejb.observer.Util.assertEvent;
public class ObserverListTest {
@Test
public void noDuplicates() {
final ObserverManager observers = new ObserverManager();
final Object observer = new Object() {
public void observe(@Observes final Object o) {
}
};
Assert.assertTrue(observers.addObserver(observer));
Assert.assertFalse(observers.addObserver(observer));
Assert.assertFalse(observers.addObserver(observer));
Assert.assertFalse(observers.addObserver(observer));
Assert.assertTrue(observers.removeObserver(observer));
Assert.assertFalse(observers.removeObserver(observer));
Assert.assertFalse(observers.removeObserver(observer));
Assert.assertFalse(observers.removeObserver(observer));
}
@Test
public void observerAddAndRemoveEvents() {
final Object observer = new Object() {
public void observe(@Observes final Object o) {
}
};
final List<String> invoked = new ArrayList<String>();
final ObserverManager observers = new ObserverManager();
observers.addObserver(new Object() {
public void observe(@Observes final ObserverAdded o) {
invoked.add(o.getClass().getSimpleName());
Assert.assertSame(observer, o.getObserver());
}
public void observe(@Observes final ObserverRemoved o) {
invoked.add(o.getClass().getSimpleName());
Assert.assertSame(observer, o.getObserver());
}
});
invoked.clear();
observers.addObserver(observer);
observers.removeObserver(observer);
observers.addObserver(observer);
observers.removeObserver(observer);
assertEvent(invoked,
"ObserverAdded",
"ObserverRemoved",
"ObserverAdded",
"ObserverRemoved"
);
}
}