| /* |
| * 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.assertThatIllegalArgumentException; |
| import static org.junit.jupiter.api.Assertions.assertEquals; |
| |
| import org.junit.jupiter.api.BeforeAll; |
| import org.junit.jupiter.api.Test; |
| |
| /** |
| * Unit tests for {@link JaccardDistance}. |
| */ |
| public class JaccardDistanceTest { |
| |
| private static JaccardDistance classBeingTested; |
| |
| @BeforeAll |
| public static void setUp() { |
| classBeingTested = new JaccardDistance(); |
| } |
| |
| @Test |
| public void testGettingJaccardDistance() { |
| // Expected Jaccard distance = 1.0 - (intersect / union) |
| assertEquals(0.0, classBeingTested.apply("", "")); |
| assertEquals(1.0, classBeingTested.apply("left", "")); |
| assertEquals(1.0, classBeingTested.apply("", "right")); |
| assertEquals(1.0 - (3.0 / 4), classBeingTested.apply("frog", "fog")); |
| assertEquals(1.0, classBeingTested.apply("fly", "ant")); |
| assertEquals(1.0 - (2.0 / 9), classBeingTested.apply("elephant", "hippo")); |
| assertEquals(1.0 - (7.0 / 11), classBeingTested.apply("ABC Corporation", "ABC Corp")); |
| assertEquals(1.0 - (13.0 / 17), |
| classBeingTested.apply("D N H Enterprises Inc", "D & H Enterprises, Inc.")); |
| assertEquals(1.0 - (16.0 / 18), |
| classBeingTested.apply("My Gym Children's Fitness Center", "My Gym. Childrens Fitness")); |
| assertEquals(1.0 - (9.0 / 10), classBeingTested.apply("PENNSYLVANIA", "PENNCISYLVNIA")); |
| assertEquals(1.0 - (1.0 / 8), classBeingTested.apply("left", "right")); |
| assertEquals(1.0 - (1.0 / 8), classBeingTested.apply("leettteft", "ritttght")); |
| assertEquals(0.0, classBeingTested.apply("the same string", "the same string")); |
| } |
| |
| @Test |
| public void testGettingJaccardDistanceNullNull() { |
| assertThatIllegalArgumentException().isThrownBy(() -> classBeingTested.apply(null, null)); |
| } |
| |
| @Test |
| public void testGettingJaccardDistanceStringNull() { |
| assertThatIllegalArgumentException().isThrownBy(() -> classBeingTested.apply(" ", null)); |
| } |
| |
| @Test |
| public void testGettingJaccardDistanceNullString() { |
| assertThatIllegalArgumentException().isThrownBy(() -> classBeingTested.apply(null, "right")); |
| } |
| } |