ClientApplicationEventTest.java

/*
 * Copyright 2014 the original author or 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 de.codecentric.boot.admin.event;

import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.not;
import static org.junit.Assert.assertThat;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

import org.apache.commons.io.output.ByteArrayOutputStream;
import org.junit.Test;

import de.codecentric.boot.admin.model.Application;

public class ClientApplicationEventTest {

	@Test
	public void hashCode_equals() throws Exception {
		ClientApplicationEvent event1 = new ClientApplicationRegisteredEvent(
				Application.create("test").withHealthUrl("http://health").build());
		ClientApplicationEvent event2 = cloneBySerialization(event1);

		assertThat(event1.hashCode(), is(event2.hashCode()));
		assertThat(event1, is(event2));
	}

	@Test
	public void equals() throws Exception {
		ClientApplicationEvent event1 = new ClientApplicationRegisteredEvent(
				Application.create("test").withHealthUrl("http://health").build());
		ClientApplicationEvent event2 = new ClientApplicationDeregisteredEvent(
				Application.create("test").withHealthUrl("http://health").build());

		assertThat(event1, not(is(event2)));
	}

	@SuppressWarnings("unchecked")
	/**
	 * yeah nasty but we need exact the same timestamp
	 */
	private <T extends Serializable> T cloneBySerialization(T obj)
			throws IOException, ClassNotFoundException {
		try (ByteArrayOutputStream buf = new ByteArrayOutputStream()) {
			try (ObjectOutputStream oos = new ObjectOutputStream(buf)) {
				oos.writeObject(obj);
			}

			try (ObjectInputStream ois = new ObjectInputStream(
					new ByteArrayInputStream(buf.toByteArray()))) {
				return (T) ois.readObject();
			}
		}
	}

}