/*
    * 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 java.util.ArrayList;
  import java.util.Iterator;
  import java.util.List;
  import java.util.NoSuchElementException;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests the UniqueFilterIterator class.
   */
  public class UniqueFilterIteratorTest<E> extends AbstractIteratorTest<E> {
  
      protected String[] testArray = {
          "One", "Two", "Three", "Four", "Five", "Six"
      };
  
      protected List<E> list1;
  
      public UniqueFilterIteratorTest() {
          super(UniqueFilterIteratorTest.class.getSimpleName());
      }
  
      @Override
      public UniqueFilterIterator<E> makeEmptyIterator() {
          final ArrayList<E> list = new ArrayList<>();
          return new UniqueFilterIterator<>(list.iterator());
      }
  
      @Override
      public UniqueFilterIterator<E> makeObject() {
          final Iterator<E> i = list1.iterator();
          return new UniqueFilterIterator<>(i);
      }
  
      @BeforeEach
      @SuppressWarnings("unchecked")
      public void setUp() {
          list1 = new ArrayList<>();
          list1.add((E) "One");
          list1.add((E) "Two");
          list1.add((E) "Three");
          list1.add((E) "Two");
          list1.add((E) "One");
          list1.add((E) "Four");
          list1.add((E) "Five");
          list1.add((E) "Five");
          list1.add((E) "Six");
          list1.add((E) "Five");
      }
  
      @Test
      public void testIterator() {
          final Iterator<E> iter = makeObject();
          for (final String testValue : testArray) {
              final E iterValue = iter.next();
  
              assertEquals(testValue, iterValue, "Iteration value is correct");
          }
  
          assertFalse(iter.hasNext(), "Iterator should now be empty");
  
          try {
              iter.next();
          } catch (final Exception e) {
              assertEquals(e.getClass(), new NoSuchElementException().getClass(), "NoSuchElementException must be thrown");
          }
      }
  
  }