/*
    * 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.collections4.iterators;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import java.util.Iterator;
  import java.util.NoSuchElementException;
  
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests the ArrayIterator with primitive type arrays.
   *
   * @param <E> the type of elements tested by this iterator.
   */
  public class ArrayIterator2Test<E> extends AbstractIteratorTest<E> {
  
      protected int[] testArray = { 2, 4, 6, 8 };
  
      public ArrayIterator<E> makeArrayIterator(final Object array) {
          return new ArrayIterator<>(array);
      }
  
      public ArrayIterator<E> makeArrayIterator(final Object array, final int index) {
          return new ArrayIterator<>(array, index);
      }
  
      public ArrayIterator<E> makeArrayIterator(final Object array, final int start, final int end) {
          return new ArrayIterator<>(array, start, end);
      }
  
      @Override
      public ArrayIterator<E> makeEmptyIterator() {
          return new ArrayIterator<>(new int[0]);
      }
  
      @Override
      public ArrayIterator<E> makeObject() {
          return new ArrayIterator<>(testArray);
      }
  
      @Override
      public boolean supportsRemove() {
          return false;
      }
  
      @Test
      public void testIndexedArray() {
          Iterator<E> iter = makeArrayIterator(testArray, 2);
          int count = 0;
          while (iter.hasNext()) {
              ++count;
              iter.next();
          }
  
          assertEquals(count, testArray.length - 2, "the count should be right using ArrayIterator(Object,2) ");
  
          iter = makeArrayIterator(testArray, 1, testArray.length - 1);
          count = 0;
          while (iter.hasNext()) {
              ++count;
              iter.next();
          }
  
          assertEquals(count, testArray.length - 2, "the count should be right using ArrayIterator(Object,1," + (testArray.length - 1) + ") ");
          assertThrows(ArrayIndexOutOfBoundsException.class, () -> makeArrayIterator(testArray, -1),
                  "new ArrayIterator(Object,-1) should throw an ArrayIndexOutOfBoundsException");
          assertThrows(ArrayIndexOutOfBoundsException.class, () -> makeArrayIterator(testArray, testArray.length + 1),
                  "new ArrayIterator(Object,length+1) should throw an ArrayIndexOutOfBoundsException");
          assertThrows(ArrayIndexOutOfBoundsException.class, () -> makeArrayIterator(testArray, 0, -1),
                  "new ArrayIterator(Object,0,-1) should throw an ArrayIndexOutOfBoundsException");
          assertThrows(ArrayIndexOutOfBoundsException.class, () -> makeArrayIterator(testArray, 0, testArray.length + 1),
                  "new ArrayIterator(Object,0,length+1) should throw an ArrayIndexOutOfBoundsException");
          assertThrows(IllegalArgumentException.class, () -> makeArrayIterator(testArray, testArray.length - 1, testArray.length - 2),
                  "new ArrayIterator(Object,length-2,length-1) should throw an IllegalArgumentException");
          iter = makeArrayIterator(testArray, 1, 1);
          // MODIFIED: an iterator over a zero-length section of array
          // should be perfectly legal behavior
      }
  
      @Test
      public void testIterator() {
         final Iterator<E> iter = makeObject();
         for (final int element : testArray) {
             final Integer testValue = Integer.valueOf(element);
             final Number iterValue = (Number) iter.next();
             assertEquals(testValue, iterValue, "Iteration value is correct");
         }
         assertFalse(iter.hasNext(), "Iterator should now be empty");
         assertThrows(NoSuchElementException.class, iter::next);
     }
 
 }