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/*
* 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.commons.lang3;
import static org.junit.Assert.*;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import org.junit.Test;
/**
* Test the Pair class.
* @author Matt Benson
*/
public class PairTest {
@Test
public void testBasic() throws Exception {
Pair<Integer, String> pair = new Pair<Integer, String>(0, "foo");
assertEquals(0, pair.left.intValue());
assertEquals("foo", pair.right);
Pair<Object, String> pair2 = new Pair<Object, String>(null, "bar");
assertNull(pair2.left);
assertEquals("bar", pair2.right);
}
@Test
public void testPairOf() throws Exception {
Pair<Integer, String> pair = Pair.of(0, "foo");
assertEquals(0, pair.left.intValue());
assertEquals("foo", pair.right);
Pair<Object, String> pair2 = Pair.of(null, "bar");
assertNull(pair2.left);
assertEquals("bar", pair2.right);
}
@Test
public void testEquals() throws Exception {
assertEquals(Pair.of(null, "foo"), Pair.of(null, "foo"));
assertFalse(Pair.of("foo", 0).equals(Pair.of("foo", null)));
}
@Test
public void testHashCode() throws Exception {
assertEquals(Pair.of(null, "foo").hashCode(), Pair.of(null, "foo").hashCode());
}
@Test
public void testToString() throws Exception {
assertEquals("(null,null)", Pair.of(null, null).toString());
assertEquals("(null,two)", Pair.of(null, "two").toString());
assertEquals("(one,null)", Pair.of("one", null).toString());
assertEquals("(one,two)", Pair.of("one", "two").toString());
}
@Test
@SuppressWarnings("unchecked")
public void testSerialization() throws Exception {
Pair<Integer, String> origPair = Pair.of(0, "foo");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream out = new ObjectOutputStream(baos);
out.writeObject(origPair);
Pair<Integer, String> deserializedPair = (Pair<Integer, String>) new ObjectInputStream(
new ByteArrayInputStream(baos.toByteArray())).readObject();
assertEquals(origPair, deserializedPair);
assertEquals(origPair.hashCode(), deserializedPair.hashCode());
}
}
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