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    * 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
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  package org.apache.hc.client5.http.impl.routing;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  
  import java.net.InetAddress;
  import java.net.URI;
  
  import org.apache.hc.client5.http.impl.DefaultSchemePortResolver;
  import org.apache.hc.client5.http.routing.RoutingSupport;
  import org.apache.hc.core5.http.HttpHost;
  import org.apache.hc.core5.http.HttpRequest;
  import org.apache.hc.core5.http.ProtocolException;
  import org.apache.hc.core5.http.message.BasicHttpRequest;
  import org.apache.hc.core5.net.URIAuthority;
  import org.hamcrest.CoreMatchers;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  
  public class TestRoutingSupport {
  
      @Test
      public void testDetermineHost() throws Exception {
          final HttpRequest request1 = new BasicHttpRequest("GET", "/");
          final HttpHost host1 = RoutingSupport.determineHost(request1);
          assertThat(host1, CoreMatchers.nullValue());
  
          final HttpRequest request2 = new BasicHttpRequest("GET", new URI("https://somehost:8443/"));
          final HttpHost host2 = RoutingSupport.determineHost(request2);
          assertThat(host2, CoreMatchers.equalTo(new HttpHost("https", "somehost", 8443)));
      }
  
      @Test
      public void testDetermineHostMissingScheme() throws Exception {
          final HttpRequest request1 = new BasicHttpRequest("GET", "/");
          request1.setAuthority(new URIAuthority("host"));
          Assertions.assertThrows(ProtocolException.class, () ->
                  RoutingSupport.determineHost(request1));
      }
  
      @Test
      public void testNormalizeHost() throws Exception {
          Assertions.assertEquals(new HttpHost("http", "somehost", 80),
                  RoutingSupport.normalize(
                          new HttpHost("http", "somehost", -1),
                          DefaultSchemePortResolver.INSTANCE));
          Assertions.assertEquals(new HttpHost("https", "somehost", 443),
                  RoutingSupport.normalize(
                          new HttpHost("https", "somehost", -1),
                          DefaultSchemePortResolver.INSTANCE));
          Assertions.assertEquals(new HttpHost("http", InetAddress.getLocalHost(), "localhost", 80),
                  RoutingSupport.normalize(
                          new HttpHost("http", InetAddress.getLocalHost(), "localhost", -1),
                          DefaultSchemePortResolver.INSTANCE));
          Assertions.assertEquals(new HttpHost("http", "somehost", 8080),
                  RoutingSupport.normalize(
                          new HttpHost("http", "somehost", 8080),
                          DefaultSchemePortResolver.INSTANCE));
      }
  
  }