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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
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
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   */
  
  package org.apache.hc.core5.http.protocol;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  import java.io.IOException;
  import java.net.InetSocketAddress;
  
  import org.apache.hc.core5.http.ContentType;
  import org.apache.hc.core5.http.EndpointDetails;
  import org.apache.hc.core5.http.HttpException;
  import org.apache.hc.core5.http.HttpRequest;
  import org.apache.hc.core5.http.HttpRequestInterceptor;
  import org.apache.hc.core5.http.HttpVersion;
  import org.apache.hc.core5.http.ProtocolException;
  import org.apache.hc.core5.http.ProtocolVersion;
  import org.apache.hc.core5.http.impl.BasicEntityDetails;
  import org.apache.hc.core5.http.message.BasicHeader;
  import org.apache.hc.core5.http.message.BasicHttpRequest;
  import org.apache.hc.core5.net.URIAuthority;
  import org.junit.jupiter.api.Test;
  
  public class TesForwardedRequest {
      private final HttpRequest request = new BasicHttpRequest("GET", "/");
      private final HttpContext context = mock(HttpContext.class);
  
      private static final String FORWARDED_HEADER_NAME = "Forwarded";
  
      @Test
      public void testProcess() throws IOException, HttpException {
          final HttpRequestInterceptor processor = new ForwardedRequest();
  
          // Create a mock endpoint with a remote address
          final InetSocketAddress remoteAddress = new InetSocketAddress("192.168.1.100", 12345);
          final InetSocketAddress localAddress = new InetSocketAddress("127.0.0.1", 2263);
  
          final EndpointDetails endpointDetails = mock(EndpointDetails.class);
          when(endpointDetails.getRemoteAddress()).thenReturn(remoteAddress);
          when(endpointDetails.getLocalAddress()).thenReturn(localAddress);
  
          // Create a mock HTTP request with a host and port
          final String host = "somehost";
          final int port = 8888;
  
          request.setAuthority(new URIAuthority(host, port));
  
          // Create a mock HTTP context with the endpoint and protocol version
          final ProtocolVersion version = HttpVersion.HTTP_1_1;
          final HttpContext context = new BasicHttpContext();
          context.setAttribute(HttpCoreContext.CONNECTION_ENDPOINT, endpointDetails);
  
          // Process the HTTP request
          processor.process(request, new BasicEntityDetails(1, ContentType.APPLICATION_JSON), context);
  
          // Check the value of the Forwarded header
          final String expectedValue = "by=" + remoteAddress.getAddress().getHostAddress() + ":" + remoteAddress.getPort() + ";" +
                  "for=" + localAddress.getAddress().getHostAddress() + ":" + localAddress.getPort() + ";" +
                  "host=\"" + host + "\";port=" + port + ";proto=" + version.getProtocol();
  
          assertEquals(expectedValue, request.getFirstHeader(FORWARDED_HEADER_NAME).getValue());
      }
  
  
      @Test
      public void testProcessWithIPv6() throws IOException, HttpException {
          final HttpRequestInterceptor processor = new ForwardedRequest();
  
          // Create a mock endpoint with a remote IPv6 address
          final InetSocketAddress remoteAddress = InetSocketAddress.createUnresolved("[2001:0db8:85a3:0000:0000:8a2e:0370:7334]", 12345);
          final InetSocketAddress localAddress = InetSocketAddress.createUnresolved("[0:0:0:0:0:0:0:1]", 2263);
 
         final EndpointDetails endpointDetails = mock(EndpointDetails.class);
         when(endpointDetails.getRemoteAddress()).thenReturn(remoteAddress);
         when(endpointDetails.getLocalAddress()).thenReturn(localAddress);
 
         // Create a mock HTTP request with a host and port
         final String host = "somehost";
         final int port = 8888;
 
         request.setAuthority(new URIAuthority(host, port));
 
         // Create a mock HTTP context with the endpoint and protocol version
         final ProtocolVersion version = HttpVersion.HTTP_1_1;
         final HttpContext context = new BasicHttpContext();
         context.setAttribute(HttpCoreContext.CONNECTION_ENDPOINT, endpointDetails);
 
         // Process the HTTP request
         processor.process(request, new BasicEntityDetails(1, ContentType.APPLICATION_JSON), context);
 
         // Check the value of the Forwarded header
         final String expectedValue = "by=" + remoteAddress.getHostName() + ":" + remoteAddress.getPort() +
                 ";for=" + localAddress.getHostName()  + ":" + localAddress.getPort() +
                 ";host=\"" + host + "\";port=" + port + ";proto=" + version.getProtocol();
 
 
         assertEquals(expectedValue, request.getFirstHeader(FORWARDED_HEADER_NAME).getValue());
     }
 
     @Test
     void testProcess_withNullEndpointDetails_shouldAddValidHeader() throws Exception {
         final HttpRequestInterceptor processor = new ForwardedRequest();
 
         // Create a mock HTTP request with a host and port
         final String host = "somehost";
         final int port = 8888;
 
         request.setAuthority(new URIAuthority(host, port));
 
         // Create a mock HTTP context with the endpoint and protocol version
         final ProtocolVersion version = HttpVersion.HTTP_1_1;
         final HttpContext context = new BasicHttpContext();
         context.setAttribute(HttpCoreContext.CONNECTION_ENDPOINT, null);
 
         // Process the HTTP request
         processor.process(request, new BasicEntityDetails(1, ContentType.APPLICATION_JSON), context);
 
         // Check the value of the Forwarded header
         final String expectedValue = "host=\"" + host + "\";port=" + port + ";proto=" + version.getProtocol();
 
         assertEquals(expectedValue, request.getFirstHeader(FORWARDED_HEADER_NAME).getValue());
     }
 
     @Test
     public void testWithForwardedHeader() throws Exception {
         final HttpRequestInterceptor processor = new ForwardedRequest();
 
         // Create a mock HTTP request with a host and port
         final String host = "newhost";
         final int port = 8888;
 
         request.setAuthority(new URIAuthority(host, port));
 
         // Create a mock HTTP context with the endpoint and protocol version
         final ProtocolVersion version = HttpVersion.HTTP_1_1;
         final HttpContext context = new BasicHttpContext();
         context.setAttribute(HttpCoreContext.CONNECTION_ENDPOINT, null);
         final String forwaredHeaderValue = "host=oldhost;port=8855;proto=HTTP";
 
         request.setHeader(new BasicHeader(FORWARDED_HEADER_NAME, forwaredHeaderValue));
 
          // Process the HTTP request
         processor.process(request, new BasicEntityDetails(1, ContentType.APPLICATION_JSON), context);
 
         // Check the value of the Forwarded header
         final String expectedValue = forwaredHeaderValue + ", " + "host=\"" + host + "\";port=" + port + ";proto=" + version.getProtocol();
 
         assertEquals(expectedValue, request.getFirstHeader(FORWARDED_HEADER_NAME).getValue());
     }
 
     @Test
     public void testProcessWithNullHttpRequest() {
         final ForwardedRequest httpRequestModifier = new ForwardedRequest();
         assertThrows(NullPointerException.class, () -> httpRequestModifier.process(null, null, context));
     }
 
     @Test
     public void testProcessWithNullHttpContext() {
         final ForwardedRequest httpRequestModifier = new ForwardedRequest();
         assertThrows(NullPointerException.class, () -> httpRequestModifier.process(request, null, null));
     }
 
     @Test
     public void testProcessWithNullAuthority() {
         final ForwardedRequest httpRequestModifier = new ForwardedRequest();
         assertThrows(ProtocolException.class, () -> httpRequestModifier.process(request, null, context));
     }
 }