/*
* 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.reflect;
import org.apache.commons.lang3.reflect.testbed.AnotherChild;
import org.apache.commons.lang3.reflect.testbed.AnotherParent;
import org.apache.commons.lang3.reflect.testbed.Grandchild;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
/**
* Unit tests InheritanceUtils
*/
public class InheritanceUtilsTest {
@Test
public void testConstructor() throws Exception {
assertNotNull(InheritanceUtils.class.newInstance());
}
@Test
public void testDistanceGreaterThanZero() {
assertEquals(1, InheritanceUtils.distance(AnotherChild.class, AnotherParent.class));
assertEquals(1, InheritanceUtils.distance(Grandchild.class, AnotherChild.class));
assertEquals(2, InheritanceUtils.distance(Grandchild.class, AnotherParent.class));
assertEquals(3, InheritanceUtils.distance(Grandchild.class, Object.class));
}
@Test
public void testDistanceEqual() {
assertEquals(0, InheritanceUtils.distance(AnotherChild.class, AnotherChild.class));
}
@Test
public void testDistanceEqualObject() {
assertEquals(0, InheritanceUtils.distance(Object.class, Object.class));
}
@Test
public void testDistanceNullChild() {
assertEquals(-1, InheritanceUtils.distance(null, Object.class));
}
@Test
public void testDistanceNullParent() {
assertEquals(-1, InheritanceUtils.distance(Object.class, null));
}
@Test
public void testDistanceNullParentNullChild() {
assertEquals(-1, InheritanceUtils.distance(null, null));
}
@Test
public void testDistanceDisjoint() {
assertEquals(-1, InheritanceUtils.distance(Boolean.class, String.class));
}
@Test
public void testDistanceReverseParentChild() {
assertEquals(-1, InheritanceUtils.distance(Object.class, Grandchild.class));
}
}