/*
    * 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.assertNotSame;
  import static org.junit.jupiter.api.Assertions.assertSame;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.commons.collections4.IterableMap;
  import org.apache.commons.collections4.MapIterator;
  import org.apache.commons.collections4.Unmodifiable;
  import org.apache.commons.collections4.bidimap.DualHashBidiMap;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests the UnmodifiableMapIterator.
   *
   * @param <K> the type of the keys in the maps tested.
   * @param <V> the type of the values in the maps tested.
   */
  public class UnmodifiableMapIteratorTest<K, V> extends AbstractMapIteratorTest<K, V> {
  
      @Override
      @SuppressWarnings("unchecked")
      public Map<K, V> getConfirmedMap() {
          final Map<K, V> testMap = new HashMap<>();
          testMap.put((K) "A", (V) "a");
          testMap.put((K) "B", (V) "b");
          testMap.put((K) "C", (V) "c");
          return testMap;
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public IterableMap<K, V> getMap() {
          final IterableMap<K, V> testMap = new DualHashBidiMap<>();
          testMap.put((K) "A", (V) "a");
          testMap.put((K) "B", (V) "b");
          testMap.put((K) "C", (V) "c");
          return testMap;
      }
  
      @Override
      public MapIterator<K, V> makeEmptyIterator() {
          return UnmodifiableMapIterator.unmodifiableMapIterator(new DualHashBidiMap<K, V>().mapIterator());
      }
  
      @Override
      public MapIterator<K, V> makeObject() {
          return UnmodifiableMapIterator.unmodifiableMapIterator(getMap().mapIterator());
      }
  
      @Override
      public boolean supportsRemove() {
          return false;
      }
  
      @Override
      public boolean supportsSetValue() {
          return false;
      }
  
      @Test
      public void testDecorateFactory() {
          MapIterator<K, V> it = makeObject();
          assertSame(it, UnmodifiableMapIterator.unmodifiableMapIterator(it));
  
          it = getMap().mapIterator();
          assertNotSame(it, UnmodifiableMapIterator.unmodifiableMapIterator(it));
  
          assertThrows(NullPointerException.class, () -> UnmodifiableMapIterator.unmodifiableMapIterator(null));
      }
  
      @Test
      public void testMapIterator() {
          assertTrue(makeEmptyIterator() instanceof Unmodifiable);
      }
  
  }