/*
    * 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
    *
    *      https://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.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import java.util.Objects;
  import java.util.stream.Stream;
  
  import org.apache.commons.text.TextStringBuilder;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link SimilarityInput}.
   */
  public class SimilarityInputTest {
  
      public static final class SimilarityInputFixture implements SimilarityInput<Object> {
  
          private final CharSequence value;
  
          public SimilarityInputFixture(final String value) {
              this.value = Objects.requireNonNull(value);
          }
  
          @Override
          public Object at(final int i) {
              return value.charAt(i);
          }
  
          @Override
          public boolean equals(final Object obj) {
              if (this == obj) {
                  return true;
              }
              if (obj == null) {
                  return false;
              }
              if (getClass() != obj.getClass()) {
                  return false;
              }
              final SimilarityInputFixture other = (SimilarityInputFixture) obj;
              return Objects.equals(value, other.value);
          }
  
          @Override
          public int hashCode() {
              return Objects.hash(value);
          }
  
          @Override
          public int length() {
              return value.length();
          }
  
      }
  
      static SimilarityInput<Object> build(final Class<?> fixtureClass, final String value) {
          if (value == null) {
              return null;
          }
          try {
              // Use the Class' constructor with a single String.
              return SimilarityInput.input((Object) fixtureClass.getConstructor(String.class).newInstance(value));
          } catch (final ReflectiveOperationException e) {
              throw new AssertionError(e);
          }
      }
  
      static Stream<Class<?>> similarityInputs() {
          return Stream.of(SimilarityInputTest.SimilarityInputFixture.class, String.class, StringBuilder.class, StringBuffer.class, TextStringBuilder.class);
      }
  
      static Stream<Class<?>> similarityInputsEquals() {
          return Stream.of(SimilarityInputTest.SimilarityInputFixture.class, String.class, TextStringBuilder.class);
      }
  
      @Test
      void testInput() throws Exception {
          final SimilarityInput<Character> input = SimilarityInput.input("a");
          assertEquals(1, input.length());
          assertThrows(IllegalArgumentException.class, () -> SimilarityInput.input(new Object()));
      }
 
 }