/*
    * 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 static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
  
  import org.junit.jupiter.api.BeforeAll;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link LongestCommonSubsequenceDistance}.
   */
  public class LongestCommonSubsequenceDistanceTest {
  
      private static LongestCommonSubsequenceDistance subject;
  
      @BeforeAll
      public static void setup() {
          subject = new LongestCommonSubsequenceDistance();
      }
  
      @Test
      public void testGettingLongestCommonSubsequenceDistance() {
          assertThat(subject.apply("", "")).isEqualTo(0);
          assertThat(subject.apply("left", "")).isEqualTo(4);
          assertThat(subject.apply("", "right")).isEqualTo(5);
          assertThat(subject.apply("frog", "fog")).isEqualTo(1);
          assertThat(subject.apply("fly", "ant")).isEqualTo(6);
          assertThat(subject.apply("elephant", "hippo")).isEqualTo(11);
          assertThat(subject.apply("ABC Corporation", "ABC Corp")).isEqualTo(7);
          assertThat(subject.apply("D N H Enterprises Inc", "D & H Enterprises, Inc.")).isEqualTo(4);
          assertThat(subject.apply("My Gym Children's Fitness Center", "My Gym. Childrens Fitness")).isEqualTo(9);
          assertThat(subject.apply("PENNSYLVANIA", "PENNCISYLVNIA")).isEqualTo(3);
          assertThat(subject.apply("left", "right")).isEqualTo(7);
          assertThat(subject.apply("leettteft", "ritttght")).isEqualTo(9);
          assertThat(subject.apply("the same string", "the same string")).isEqualTo(0);
      }
  
      @Test
      public void testGettingLongestCommonSubsequenceDistanceNullNull() {
          assertThatIllegalArgumentException().isThrownBy(() -> subject.apply(null, null));
      }
  
      @Test
      public void testGettingLongestCommonSubsequenceDistanceNullString() {
          assertThatIllegalArgumentException().isThrownBy(() -> subject.apply(null, "right"));
      }
  
      @Test
      public void testGettingLongestCommonSubsequenceDistanceStringNull() {
          assertThatIllegalArgumentException().isThrownBy(() -> subject.apply(" ", null));
      }
  
  }