| /* |
| * 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.jackrabbit.oak.spi.commit; |
| |
| import static com.google.common.collect.Sets.newHashSet; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| import static org.mockito.Mockito.mock; |
| import static org.mockito.Mockito.when; |
| |
| import java.io.Closeable; |
| import java.util.Set; |
| |
| import com.google.common.collect.ImmutableSet; |
| import org.apache.jackrabbit.oak.spi.commit.Observable; |
| import org.apache.jackrabbit.oak.spi.commit.Observer; |
| import org.apache.jackrabbit.oak.spi.commit.ObserverTracker; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.ServiceReference; |
| |
| public class ObserverTrackerTest { |
| private final Set<Observer> observers = newHashSet(); |
| |
| private final Observable observable = new Observable() { |
| @Override |
| public Closeable addObserver(final Observer observer) { |
| observers.add(observer); |
| return new Closeable() { |
| @Override |
| public void close() { |
| if (!observers.remove(observer)) { |
| fail("Already closed"); |
| } |
| } |
| }; |
| } |
| }; |
| |
| private final ObserverTracker tracker = new ObserverTracker(observable); |
| |
| private final ServiceReference ref1 = mock(ServiceReference.class); |
| private final Observer observer1 = mock(Observer.class); |
| private final ServiceReference ref2 = mock(ServiceReference.class); |
| private final Observer observer2 = mock(Observer.class); |
| |
| @Before |
| public void setup() { |
| BundleContext bundleContext = mock(BundleContext.class); |
| when(bundleContext.getService(ref1)).thenReturn(observer1); |
| when(bundleContext.getService(ref2)).thenReturn(observer2); |
| tracker.start(bundleContext); |
| } |
| |
| @After |
| public void tearDown() { |
| tracker.stop(); |
| } |
| |
| @Test |
| public void registerUnregister() { |
| tracker.addingService(ref1); |
| assertEquals(ImmutableSet.of(observer1), observers); |
| |
| tracker.addingService(ref2); |
| assertEquals(ImmutableSet.of(observer1, observer2), observers); |
| |
| tracker.removedService(ref1, null); |
| assertEquals(ImmutableSet.of(observer2), observers); |
| |
| tracker.removedService(ref2, null); |
| assertTrue(observers.isEmpty()); |
| } |
| |
| @Test |
| public void registerTwice() { |
| tracker.addingService(ref1); |
| assertEquals(ImmutableSet.of(observer1), observers); |
| |
| // Adding an already added service should have no effect |
| tracker.addingService(ref1); |
| assertEquals(ImmutableSet.of(observer1), observers); |
| } |
| |
| @Test |
| public void unregisterWhenEmpty() { |
| tracker.removedService(ref1, null); |
| assertTrue(observers.isEmpty()); |
| } |
| |
| @Test |
| public void unregisterTwice() { |
| tracker.addingService(ref1); |
| assertEquals(ImmutableSet.of(observer1), observers); |
| |
| tracker.removedService(ref1, null); |
| assertTrue(observers.isEmpty()); |
| |
| // Removing a removed service should have no effect |
| tracker.removedService(ref1, null); |
| assertTrue(observers.isEmpty()); |
| } |
| |
| } |