/*
    * 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.jxpath.util;
  
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertSame;
  
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Set;
  
  import org.junit.jupiter.api.Test;
  
  public class ValueUtilsTest {
  
      @Test
      public void testGetValueFromArray() {
          final Object data = new Object();
          assertSame(data, ValueUtils.getValue(new Object[] { data }, 0));
      }
  
      @Test
      public void testGetValueFromArrayNegativeIndex() {
          final Object data = new Object();
          assertNull(ValueUtils.getValue(new Object[] { data }, -1));
      }
  
      @Test
      public void testGetValueFromArrayTooSmall() {
          assertNull(ValueUtils.getValue(new Object[0], 2));
      }
  
      @Test
      public void testGetValueFromList() {
          final Object data = new Object();
          assertSame(data, ValueUtils.getValue(Arrays.asList(data), 0));
      }
  
      @Test
      public void testGetValueFromListNegativeIndex() {
          final Object data = new Object();
          final Object res = ValueUtils.getValue(Arrays.asList(data), -1);
          assertNull(res, "Expected null, is " + res);
      }
  
      @Test
      public void testGetValueFromListTooSmall() {
          assertNull(ValueUtils.getValue(Collections.EMPTY_LIST, 2));
      }
  
      @Test
      public void testGetValueFromSet() {
          final Object data = new Object();
          final Set dataSet = new HashSet();
          dataSet.add(data);
          assertSame(data, ValueUtils.getValue(dataSet, 0));
      }
  
      @Test
      public void testGetValueFromSetNegativeIndex() {
          final Object data = new Object();
          final Set dataSet = new HashSet();
          dataSet.add(data);
          assertNull(ValueUtils.getValue(dataSet, -1));
      }
  
      /*
       * This test would break without the patch and an NoSuchElementException being thrown instead.
       */
      @Test
      public void testGetValueFromSetTooSmall() {
          assertNull(ValueUtils.getValue(Collections.EMPTY_SET, 2));
      }
  }