| /* |
| * 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.text.similarity; |
| |
| import static org.assertj.core.api.Assertions.assertThat; |
| |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| |
| /** |
| * Unit tests for {@link HammingDistance}. |
| */ |
| public class HammingDistanceTest { |
| |
| private static HammingDistance distance; |
| |
| @BeforeClass |
| public static void setUp() { |
| distance = new HammingDistance(); |
| } |
| |
| @Test |
| public void testHammingDistance() { |
| assertThat(distance.apply("", "")).isEqualTo(0); |
| assertThat(distance.apply("pappa", "pappa")).isEqualTo(0); |
| assertThat(distance.apply("papaa", "pappa")).isEqualTo(1); |
| assertThat(distance.apply("karolin", "kathrin")).isEqualTo(3); |
| assertThat(distance.apply("karolin", "kerstin")).isEqualTo(3); |
| assertThat(distance.apply("1011101", "1001001")).isEqualTo(2); |
| assertThat(distance.apply("2173896", "2233796")).isEqualTo(3); |
| assertThat(distance.apply("ATCG", "ACCC")).isEqualTo(2); |
| } |
| |
| @Test(expected = IllegalArgumentException.class) |
| public void testHammingDistance_nullLeftValue() { |
| distance.apply(null, ""); |
| } |
| |
| @Test(expected = IllegalArgumentException.class) |
| public void testHammingDistance_nullRightValue() { |
| distance.apply("", null); |
| } |
| |
| } |