/*
    * 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.lookup;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import java.net.InetAddress;
  
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link InetAddressStringLookup#LOOPACK_ADDRESS}.
   */
  class InetAddressStringLookupLoopbackAddressTest {
  
      @Test
      void testAddress() {
          assertEquals(InetAddress.getLoopbackAddress().getHostAddress(), InetAddressStringLookup.LOOPACK_ADDRESS.apply("address"));
      }
  
      @Test
      void testBadKey() {
          assertThrows(IllegalArgumentException.class, () -> InetAddressStringLookup.LOOPACK_ADDRESS.apply("FOO"));
      }
  
      @Test
      void testCanonicalName() {
          assertEquals(InetAddress.getLoopbackAddress().getCanonicalHostName(), InetAddressStringLookup.LOOPACK_ADDRESS.apply("canonical-name"));
      }
  
      @Test
      void testName() {
          assertEquals(InetAddress.getLoopbackAddress().getHostName(), InetAddressStringLookup.LOOPACK_ADDRESS.apply("name"));
      }
  
      @Test
      void testNull() {
          assertNull(InetAddressStringLookup.LOOPACK_ADDRESS.apply(null));
      }
  
      @Test
      void testToString() {
          // does not blow up and gives some kind of string.
          assertFalse(InetAddressStringLookup.LOOPACK_ADDRESS.toString().isEmpty());
      }
  
  }