/*
    * ====================================================================
    * 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/>.
   *
   */
  
  package org.apache.hc.core5.http.protocol;
  
  import java.nio.charset.StandardCharsets;
  
  import org.apache.hc.core5.http.ClassicHttpResponse;
  import org.apache.hc.core5.http.ContentType;
  import org.apache.hc.core5.http.Header;
  import org.apache.hc.core5.http.HeaderElements;
  import org.apache.hc.core5.http.HttpHeaders;
  import org.apache.hc.core5.http.HttpStatus;
  import org.apache.hc.core5.http.HttpVersion;
  import org.apache.hc.core5.http.Method;
  import org.apache.hc.core5.http.ProtocolException;
  import org.apache.hc.core5.http.io.entity.EmptyInputStream;
  import org.apache.hc.core5.http.io.entity.BasicHttpEntity;
  import org.apache.hc.core5.http.io.entity.HttpEntities;
  import org.apache.hc.core5.http.io.entity.StringEntity;
  import org.apache.hc.core5.http.message.BasicClassicHttpRequest;
  import org.apache.hc.core5.http.message.BasicClassicHttpResponse;
  import org.apache.hc.core5.http.message.BasicHeader;
  import org.apache.hc.core5.net.URIAuthority;
  import org.junit.Assert;
  import org.junit.Test;
  
  public class TestStandardInterceptors {
  
      @Test
      public void testRequestConnControlGenerated() throws Exception {
          final HttpContext context = new BasicHttpContext(null);
          final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
          final RequestConnControl interceptor = new RequestConnControl();
          interceptor.process(request, request.getEntity(), context);
          final Header header = request.getFirstHeader(HttpHeaders.CONNECTION);
          Assert.assertNotNull(header);
          Assert.assertEquals("keep-alive", header.getValue());
      }
  
      @Test
      public void testRequestConnControlConnectMethod() throws Exception {
          final HttpContext context = new BasicHttpContext(null);
          final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.CONNECT, "/");
          final RequestConnControl interceptor = new RequestConnControl();
          interceptor.process(request, request.getEntity(), context);
          final Header header = request.getFirstHeader(HttpHeaders.CONNECTION);
          Assert.assertNull(header);
      }
  
      @Test
      public void testRequestConnControlCustom() throws Exception {
          final HttpContext context = new BasicHttpContext(null);
          final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
          final Header myheader = new BasicHeader(HttpHeaders.CONNECTION, "close");
          request.addHeader(myheader);
          final RequestConnControl interceptor = new RequestConnControl();
          interceptor.process(request, request.getEntity(), context);
          final Header header = request.getFirstHeader(HttpHeaders.CONNECTION);
          Assert.assertNotNull(header);
          Assert.assertEquals("close", header.getValue());
          Assert.assertTrue(header == myheader);
      }
  
      @Test
      public void testRequestConnControlUpgrade() throws Exception {
          final HttpContext context = new BasicHttpContext(null);
          final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
          request.addHeader(HttpHeaders.UPGRADE, "HTTP/2");
          final RequestConnControl interceptor = new RequestConnControl();
          interceptor.process(request, request.getEntity(), context);
          final Header header = request.getFirstHeader(HttpHeaders.CONNECTION);
          Assert.assertNotNull(header);
          Assert.assertEquals("upgrade", header.getValue());
      }
 
     @Test
     public void testRequestConnControlInvalidInput() throws Exception {
         final RequestConnControl interceptor = new RequestConnControl();
         try {
             interceptor.process(null, null, null);
             Assert.fail("NullPointerException should have been thrown");
         } catch (final NullPointerException ex) {
             // expected
         }
     }
 
     @Test
     public void testRequestContentProtocolException() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request1 = new BasicClassicHttpRequest(Method.POST, "/");
         request1.addHeader(new BasicHeader(HttpHeaders.TRANSFER_ENCODING, "chunked"));
         final BasicClassicHttpRequest request2 = new BasicClassicHttpRequest(Method.POST, "/");
         request2.addHeader(new BasicHeader(HttpHeaders.CONTENT_LENGTH, "12"));
 
         final RequestContent interceptor = new RequestContent();
         try {
             interceptor.process(request1, request1.getEntity(), context);
             Assert.fail("ProtocolException should have been thrown");
         } catch (final ProtocolException ex) {
             // expected
         }
         try {
             interceptor.process(request2, request2.getEntity(), context);
             Assert.fail("ProtocolException should have been thrown");
         } catch (final ProtocolException ex) {
             // expected
         }
    }
 
     @Test
     public void testRequestContentNullEntity() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
 
         final RequestContent interceptor = new RequestContent();
         interceptor.process(request, request.getEntity(), context);
         final Header header = request.getFirstHeader(HttpHeaders.CONTENT_LENGTH);
         Assert.assertNull(header);
         Assert.assertNull(request.getFirstHeader(HttpHeaders.TRANSFER_ENCODING));
    }
 
     @Test
     public void testRequestContentEntityContentLengthDelimitedHTTP11() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
         request.setEntity(new StringEntity("whatever", StandardCharsets.US_ASCII));
 
         final RequestContent interceptor = new RequestContent();
         interceptor.process(request, request.getEntity(), context);
         final Header header = request.getFirstHeader(HttpHeaders.CONTENT_LENGTH);
         Assert.assertNotNull(header);
         Assert.assertEquals(8, Integer.parseInt(header.getValue()));
         Assert.assertNull(request.getFirstHeader(HttpHeaders.TRANSFER_ENCODING));
    }
 
     @Test
     public void testRequestContentEntityChunkedHTTP11() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
         request.setEntity(new StringEntity("whatever", StandardCharsets.US_ASCII, true));
 
         final RequestContent interceptor = new RequestContent();
         interceptor.process(request, request.getEntity(), context);
         final Header header = request.getFirstHeader(HttpHeaders.TRANSFER_ENCODING);
         Assert.assertNotNull(header);
         Assert.assertEquals("chunked", header.getValue());
         Assert.assertNull(request.getFirstHeader(HttpHeaders.CONTENT_LENGTH));
    }
 
     @Test
     public void testRequestContentEntityUnknownLengthHTTP11() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
         request.setEntity(new BasicHttpEntity(EmptyInputStream.INSTANCE, -1, null));
 
         final RequestContent interceptor = new RequestContent();
         interceptor.process(request, request.getEntity(), context);
         final Header header = request.getFirstHeader(HttpHeaders.TRANSFER_ENCODING);
         Assert.assertNotNull(header);
         Assert.assertEquals("chunked", header.getValue());
         Assert.assertNull(request.getFirstHeader(HttpHeaders.CONTENT_LENGTH));
     }
 
     @Test
     public void testRequestContentEntityChunkedHTTP10() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         context.setProtocolVersion(HttpVersion.HTTP_1_0);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
         request.setEntity(new StringEntity("whatever", StandardCharsets.US_ASCII, true));
 
         final RequestContent interceptor = new RequestContent();
         try {
             interceptor.process(request, request.getEntity(), context);
             Assert.fail("ProtocolException should have been thrown");
         } catch (final ProtocolException ex) {
             // expected
         }
     }
 
     @Test
     public void testRequestContentTypeAndEncoding() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
         request.setEntity(new BasicHttpEntity(EmptyInputStream.INSTANCE,
                 ContentType.parseLenient("whatever"), "whatever"));
 
         final RequestContent interceptor = new RequestContent();
         interceptor.process(request, request.getEntity(), context);
         final Header h1 = request.getFirstHeader(HttpHeaders.CONTENT_TYPE);
         Assert.assertNotNull(h1);
         Assert.assertEquals("whatever", h1.getValue());
         final Header h2 = request.getFirstHeader(HttpHeaders.CONTENT_ENCODING);
         Assert.assertNotNull(h2);
         Assert.assertEquals("whatever", h2.getValue());
     }
 
     @Test
     public void testRequestContentNullTypeAndEncoding() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
         request.setEntity(new BasicHttpEntity(EmptyInputStream.INSTANCE, null, null));
 
         final RequestContent interceptor = new RequestContent();
         interceptor.process(request, request.getEntity(), context);
         Assert.assertNull(request.getFirstHeader(HttpHeaders.CONTENT_TYPE));
         Assert.assertNull(request.getFirstHeader(HttpHeaders.CONTENT_ENCODING));
     }
 
     @Test
     public void testRequestContentEntityUnknownLengthHTTP10() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         context.setProtocolVersion(HttpVersion.HTTP_1_0);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
         request.setEntity(new BasicHttpEntity(EmptyInputStream.INSTANCE, -1, null));
 
         final RequestContent interceptor = new RequestContent();
         try {
             interceptor.process(request, request.getEntity(), context);
             Assert.fail("ProtocolException should have been thrown");
         } catch (final ProtocolException ex) {
             // expected
         }
    }
 
     @Test
     public void testRequestContentInvalidInput() throws Exception {
         final RequestContent interceptor = new RequestContent();
         try {
             interceptor.process(null, null, null);
             Assert.fail("NullPointerException should have been thrown");
         } catch (final NullPointerException ex) {
             // expected
         }
     }
 
     @Test
     public void testRequestContentIgnoreNonenclosingRequests() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
         final RequestContent interceptor = new RequestContent();
         interceptor.process(request, request.getEntity(), context);
         Assert.assertEquals(0, request.getHeaders().length);
     }
 
     @Test
     public void testRequestContentOverwriteHeaders() throws Exception {
         final RequestContent interceptor = new RequestContent(true);
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
         request.addHeader(new BasicHeader(HttpHeaders.CONTENT_LENGTH, "10"));
         request.addHeader(new BasicHeader(HttpHeaders.TRANSFER_ENCODING, "whatever"));
         request.setEntity(new StringEntity(""));
         interceptor.process(request, request.getEntity(), context);
         final Header h1 = request.getFirstHeader(HttpHeaders.CONTENT_LENGTH);
         Assert.assertNotNull(h1);
         Assert.assertEquals("0", h1.getValue());
     }
 
     @Test
     public void testRequestContentAddHeaders() throws Exception {
         final RequestContent interceptor = new RequestContent(true);
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
         request.setEntity(new StringEntity(""));
         interceptor.process(request, request.getEntity(), context);
         final Header h1 = request.getFirstHeader(HttpHeaders.CONTENT_LENGTH);
         Assert.assertNotNull(h1);
         Assert.assertEquals("0", h1.getValue());
         final Header h2 = request.getFirstHeader(HttpHeaders.TRANSFER_ENCODING);
         Assert.assertNull(h2);
     }
 
     @Test
     public void testRequestContentEntityWithTrailers() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
         request.setEntity(HttpEntities.create("whatever", StandardCharsets.US_ASCII,
                 new BasicHeader("h1", "this"), new BasicHeader("h1", "that"), new BasicHeader("h2", "this and that")));
 
         final RequestContent interceptor = new RequestContent();
         interceptor.process(request, request.getEntity(), context);
         final Header header1 = request.getFirstHeader(HttpHeaders.TRANSFER_ENCODING);
         Assert.assertNotNull(header1);
         final Header header2 = request.getFirstHeader(HttpHeaders.TRAILER);
         Assert.assertNotNull(header2);
         Assert.assertEquals("h1, h2", header2.getValue());
     }
 
     @Test(expected = ProtocolException.class)
     public void testRequestContentTraceWithEntity() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.TRACE, "/");
         request.setEntity(new StringEntity("stuff"));
         final RequestContent interceptor = new RequestContent();
         interceptor.process(request, request.getEntity(), context);
     }
 
     @Test
     public void testRequestExpectContinueGenerated() throws Exception {
         final HttpCoreContext context = HttpCoreContext.create();
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
         request.setEntity(new StringEntity("whatever", StandardCharsets.US_ASCII));
         final RequestExpectContinue interceptor = new RequestExpectContinue();
         interceptor.process(request, request.getEntity(), context);
         final Header header = request.getFirstHeader(HttpHeaders.EXPECT);
         Assert.assertNotNull(header);
         Assert.assertEquals(HeaderElements.CONTINUE, header.getValue());
     }
 
     @Test
     public void testRequestExpectContinueHTTP10() throws Exception {
         final HttpCoreContext context = HttpCoreContext.create();
         context.setProtocolVersion(HttpVersion.HTTP_1_0);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
         request.setEntity(new StringEntity("whatever", StandardCharsets.US_ASCII));
         final RequestExpectContinue interceptor = new RequestExpectContinue();
         interceptor.process(request, request.getEntity(), context);
         final Header header = request.getFirstHeader(HttpHeaders.EXPECT);
         Assert.assertNull(header);
     }
 
     @Test
     public void testRequestExpectContinueZeroContent() throws Exception {
         final HttpCoreContext context = HttpCoreContext.create();
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
         request.setEntity(new StringEntity("", StandardCharsets.US_ASCII));
         final RequestExpectContinue interceptor = new RequestExpectContinue();
         interceptor.process(request, request.getEntity(), context);
         final Header header = request.getFirstHeader(HttpHeaders.EXPECT);
         Assert.assertNull(header);
     }
 
     @Test
     public void testRequestExpectContinueInvalidInput() throws Exception {
         final RequestExpectContinue interceptor = new RequestExpectContinue();
         try {
             interceptor.process(null, null, null);
             Assert.fail("NullPointerException should have been thrown");
         } catch (final NullPointerException ex) {
             // expected
         }
     }
 
     @Test
     public void testRequestExpectContinueIgnoreNonenclosingRequests() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
         final RequestExpectContinue interceptor = new RequestExpectContinue();
         interceptor.process(request, request.getEntity(), context);
         Assert.assertEquals(0, request.getHeaders().length);
     }
 
     @Test
     public void testRequestTargetHostGenerated() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         request.setAuthority(new URIAuthority("somehost", 8080));
         final RequestTargetHost interceptor = new RequestTargetHost();
         interceptor.process(request, request.getEntity(), context);
         final Header header = request.getFirstHeader(HttpHeaders.HOST);
         Assert.assertNotNull(header);
         Assert.assertEquals("somehost:8080", header.getValue());
     }
 
     @Test
     public void testRequestTargetHostNotGenerated() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         request.setAuthority(new URIAuthority("somehost", 8080));
         request.addHeader(new BasicHeader(HttpHeaders.HOST, "whatever"));
         final RequestTargetHost interceptor = new RequestTargetHost();
         interceptor.process(request, request.getEntity(), context);
         final Header header = request.getFirstHeader(HttpHeaders.HOST);
         Assert.assertNotNull(header);
         Assert.assertEquals("whatever", header.getValue());
     }
 
     @Test
     public void testRequestTargetHostMissingHostHTTP10() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         context.setProtocolVersion(HttpVersion.HTTP_1_0);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         final RequestTargetHost interceptor = new RequestTargetHost();
         interceptor.process(request, request.getEntity(), context);
         final Header header = request.getFirstHeader(HttpHeaders.HOST);
         Assert.assertNull(header);
     }
 
     @Test
     public void testRequestTargetHostMissingHostHTTP11() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         final RequestTargetHost interceptor = new RequestTargetHost();
         try {
             interceptor.process(request, request.getEntity(), context);
             Assert.fail("ProtocolException should have been thrown");
         } catch (final ProtocolException ex) {
             // expected
         }
     }
 
     @Test
     public void testRequestTargetHostInvalidInput() throws Exception {
         final RequestTargetHost interceptor = new RequestTargetHost();
         try {
             interceptor.process(null, null, null);
             Assert.fail("NullPointerException should have been thrown");
         } catch (final NullPointerException ex) {
             // expected
         }
         try {
             interceptor.process(new BasicClassicHttpRequest(Method.GET, "/"), null, null);
             Assert.fail("NullPointerException should have been thrown");
         } catch (final NullPointerException ex) {
             // expected
         }
     }
 
     @Test
     public void testRequestTargetHostConnectHttp11() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.CONNECT, "/");
         request.setAuthority(new URIAuthority("somehost", 8080));
         final RequestTargetHost interceptor = new RequestTargetHost();
         interceptor.process(request, request.getEntity(), context);
         final Header header = request.getFirstHeader(HttpHeaders.HOST);
         Assert.assertNotNull(header);
         Assert.assertEquals("somehost:8080", header.getValue());
     }
 
     @Test
     public void testRequestTargetHostConnectHttp10() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         context.setProtocolVersion(HttpVersion.HTTP_1_0);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.CONNECT, "/");
         request.setAuthority(new URIAuthority("somehost", 8080));
         final RequestTargetHost interceptor = new RequestTargetHost();
         interceptor.process(request, request.getEntity(), context);
         final Header header = request.getFirstHeader(HttpHeaders.HOST);
         Assert.assertNull(header);
     }
 
     @Test
     public void testRequestUserAgentGenerated() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         final RequestUserAgent interceptor = new RequestUserAgent("some agent");
         interceptor.process(request, request.getEntity(), context);
         final Header header = request.getFirstHeader(HttpHeaders.USER_AGENT);
         Assert.assertNotNull(header);
         Assert.assertEquals("some agent", header.getValue());
     }
 
     @Test
     public void testRequestUserAgentNotGenerated() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         request.addHeader(new BasicHeader(HttpHeaders.USER_AGENT, "whatever"));
         final RequestUserAgent interceptor = new RequestUserAgent("some agent");
         interceptor.process(request, request.getEntity(), context);
         final Header header = request.getFirstHeader(HttpHeaders.USER_AGENT);
         Assert.assertNotNull(header);
         Assert.assertEquals("whatever", header.getValue());
     }
 
     @Test
     public void testRequestUserAgentMissingUserAgent() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         final RequestUserAgent interceptor = new RequestUserAgent();
         interceptor.process(request, request.getEntity(), context);
         final Header header = request.getFirstHeader(HttpHeaders.USER_AGENT);
         Assert.assertNull(header);
     }
 
     @Test
     public void testRequestUserAgentInvalidInput() throws Exception {
         final RequestUserAgent interceptor = new RequestUserAgent();
         try {
             interceptor.process(null, null, null);
             Assert.fail("NullPointerException should have been thrown");
         } catch (final NullPointerException ex) {
             // expected
         }
     }
 
     @Test
     public void testResponseConnControlNoEntity() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         final ResponseConnControl interceptor = new ResponseConnControl();
         interceptor.process(response, response.getEntity(), context);
         final Header header = response.getFirstHeader(HttpHeaders.CONNECTION);
         Assert.assertNull(header);
     }
 
     @Test
     public void testResponseConnControlEntityContentLength() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setEntity(new StringEntity("whatever"));
         final ResponseConnControl interceptor = new ResponseConnControl();
         interceptor.process(response, response.getEntity(), context);
         final Header header = response.getFirstHeader(HttpHeaders.CONNECTION);
         Assert.assertNull(header);
     }
 
     @Test
     public void testResponseConnControlEntityUnknownContentLengthExplicitKeepAlive() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         request.addHeader(new BasicHeader(HttpHeaders.CONNECTION, "keep-alive"));
         context.setAttribute(HttpCoreContext.HTTP_REQUEST, request);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setEntity(new BasicHttpEntity(EmptyInputStream.INSTANCE, null));
         final ResponseConnControl interceptor = new ResponseConnControl();
         interceptor.process(response, response.getEntity(), context);
         final Header header = response.getFirstHeader(HttpHeaders.CONNECTION);
         Assert.assertNotNull(header);
         Assert.assertEquals("keep-alive", header.getValue());
     }
 
     @Test
     public void testResponseConnControlEntityChunked() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setEntity(new BasicHttpEntity(EmptyInputStream.INSTANCE, null, true));
         final ResponseConnControl interceptor = new ResponseConnControl();
         interceptor.process(response, response.getEntity(), context);
         final Header header = response.getFirstHeader(HttpHeaders.CONNECTION);
         Assert.assertNull(header);
     }
 
     @Test
     public void testResponseConnControlEntityUnknownContentLengthHTTP10() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         context.setProtocolVersion(HttpVersion.HTTP_1_0);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         request.addHeader(new BasicHeader(HttpHeaders.CONNECTION, "keep-alive"));
         context.setAttribute(HttpCoreContext.HTTP_REQUEST, request);
 
         final BasicClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setEntity(new BasicHttpEntity(EmptyInputStream.INSTANCE, null));
         final ResponseConnControl interceptor = new ResponseConnControl();
         interceptor.process(response, response.getEntity(), context);
         final Header header = response.getFirstHeader(HttpHeaders.CONNECTION);
         Assert.assertNotNull(header);
         Assert.assertEquals("close", header.getValue());
     }
 
     @Test
     public void testResponseConnControlClientRequest() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         request.addHeader(new BasicHeader(HttpHeaders.CONNECTION, "keep-alive"));
         context.setAttribute(HttpCoreContext.HTTP_REQUEST, request);
 
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setEntity(new StringEntity("whatever"));
         final ResponseConnControl interceptor = new ResponseConnControl();
         interceptor.process(response, response.getEntity(), context);
         final Header header = response.getFirstHeader(HttpHeaders.CONNECTION);
         Assert.assertNotNull(header);
         Assert.assertEquals("keep-alive", header.getValue());
     }
 
     @Test
     public void testResponseConnControlClientRequest2() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         context.setAttribute(HttpCoreContext.HTTP_REQUEST, request);
 
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setEntity(new StringEntity("whatever"));
         final ResponseConnControl interceptor = new ResponseConnControl();
         interceptor.process(response, response.getEntity(), context);
         final Header header = response.getFirstHeader(HttpHeaders.CONNECTION);
         Assert.assertNull(header);
     }
 
     @Test
     public void testResponseConnControl10Client11Response() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         context.setProtocolVersion(HttpVersion.HTTP_1_0);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         context.setAttribute(HttpCoreContext.HTTP_REQUEST, request);
 
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setEntity(new StringEntity("whatever"));
         final ResponseConnControl interceptor = new ResponseConnControl();
         interceptor.process(response, response.getEntity(), context);
         final Header header = response.getFirstHeader(HttpHeaders.CONNECTION);
         Assert.assertNotNull(header);
         Assert.assertEquals("close", header.getValue());
     }
 
     @Test
     public void testResponseConnControlStatusCode() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         request.addHeader(new BasicHeader(HttpHeaders.CONNECTION, "keep-alive"));
         context.setAttribute(HttpCoreContext.HTTP_REQUEST, request);
 
         final ResponseConnControl interceptor = new ResponseConnControl();
 
         final int [] statusCodes = new int[] {
                 HttpStatus.SC_BAD_REQUEST,
                 HttpStatus.SC_REQUEST_TIMEOUT,
                 HttpStatus.SC_LENGTH_REQUIRED,
                 HttpStatus.SC_REQUEST_TOO_LONG,
                 HttpStatus.SC_REQUEST_URI_TOO_LONG,
                 HttpStatus.SC_SERVICE_UNAVAILABLE,
                 HttpStatus.SC_NOT_IMPLEMENTED };
 
         for (final int statusCode : statusCodes) {
             final ClassicHttpResponse response = new BasicClassicHttpResponse(statusCode, "Unreasonable");
             interceptor.process(response, response.getEntity(), context);
             final Header header = response.getFirstHeader(HttpHeaders.CONNECTION);
             Assert.assertNotNull(header);
             Assert.assertEquals("close", header.getValue());
         }
 
     }
 
     @Test
     public void testResponseConnControlExplicitClose() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         request.addHeader(new BasicHeader(HttpHeaders.CONNECTION, "keep-alive"));
         context.setAttribute(HttpCoreContext.HTTP_REQUEST, request);
 
         final ResponseConnControl interceptor = new ResponseConnControl();
 
         final ClassicHttpResponse response = new BasicClassicHttpResponse(200, "OK");
         response.setHeader(HttpHeaders.CONNECTION, "close");
         interceptor.process(response, response.getEntity(), context);
         final Header header = response.getFirstHeader(HttpHeaders.CONNECTION);
         Assert.assertNotNull(header);
         Assert.assertEquals("close", header.getValue());
     }
 
     @Test
     public void testResponseConnControlClientRequestMixUp() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         request.addHeader(new BasicHeader(HttpHeaders.CONNECTION, "blah, keep-alive, close"));
         context.setAttribute(HttpCoreContext.HTTP_REQUEST, request);
 
         final ResponseConnControl interceptor = new ResponseConnControl();
 
         final ClassicHttpResponse response = new BasicClassicHttpResponse(200, "OK");
         interceptor.process(response, response.getEntity(), context);
         final Header header = response.getFirstHeader(HttpHeaders.CONNECTION);
         Assert.assertNotNull(header);
         Assert.assertEquals("close", header.getValue());
     }
 
     @Test
     public void testResponseConnControlUpgrade() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
 
         final ResponseConnControl interceptor = new ResponseConnControl();
 
         final ClassicHttpResponse response = new BasicClassicHttpResponse(200, "OK");
         response.addHeader(HttpHeaders.UPGRADE, "HTTP/2");
         interceptor.process(response, response.getEntity(), context);
         final Header header = response.getFirstHeader(HttpHeaders.CONNECTION);
         Assert.assertNotNull(header);
         Assert.assertEquals("upgrade", header.getValue());
     }
 
     @Test
     public void testResponseConnControlHostInvalidInput() throws Exception {
         final ResponseConnControl interceptor = new ResponseConnControl();
         try {
             interceptor.process(null, null, null);
             Assert.fail("NullPointerException should have been thrown");
         } catch (final NullPointerException ex) {
             // expected
         }
         try {
             final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
             interceptor.process(response, null, null);
             Assert.fail("NullPointerException should have been thrown");
         } catch (final NullPointerException ex) {
             // expected
         }
     }
 
     @Test
     public void testResponseContentNoEntity() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         final ResponseContent interceptor = new ResponseContent();
         interceptor.process(response, response.getEntity(), context);
         final Header header = response.getFirstHeader(HttpHeaders.CONTENT_LENGTH);
         Assert.assertNotNull(header);
         Assert.assertEquals("0", header.getValue());
     }
 
     @Test
     public void testResponseContentStatusNoContent() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setCode(HttpStatus.SC_NO_CONTENT);
         final ResponseContent interceptor = new ResponseContent();
         interceptor.process(response, response.getEntity(), context);
         final Header header = response.getFirstHeader(HttpHeaders.CONTENT_LENGTH);
         Assert.assertNull(header);
     }
 
     @Test
     public void testResponseContentStatusNotModified() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setCode(HttpStatus.SC_NOT_MODIFIED);
         final ResponseContent interceptor = new ResponseContent();
         interceptor.process(response, response.getEntity(), context);
         final Header header = response.getFirstHeader(HttpHeaders.CONTENT_LENGTH);
         Assert.assertNull(header);
     }
 
     @Test
     public void testResponseContentEntityChunked() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setEntity(new BasicHttpEntity(EmptyInputStream.INSTANCE, null, true));
         final ResponseContent interceptor = new ResponseContent();
         interceptor.process(response, response.getEntity(), context);
         final Header h1 = response.getFirstHeader(HttpHeaders.TRANSFER_ENCODING);
         Assert.assertNotNull(h1);
         Assert.assertEquals("chunked", h1.getValue());
         final Header h2 = response.getFirstHeader(HttpHeaders.CONTENT_LENGTH);
         Assert.assertNull(h2);
     }
 
     @Test
     public void testResponseContentEntityContentLenghtDelimited() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setEntity(new BasicHttpEntity(EmptyInputStream.INSTANCE, 10, null));
         final ResponseContent interceptor = new ResponseContent();
         interceptor.process(response, response.getEntity(), context);
         final Header h1 = response.getFirstHeader(HttpHeaders.CONTENT_LENGTH);
         Assert.assertNotNull(h1);
         Assert.assertEquals("10", h1.getValue());
         final Header h2 = response.getFirstHeader(HttpHeaders.TRANSFER_ENCODING);
         Assert.assertNull(h2);
     }
 
     @Test
     public void testResponseContentEntityUnknownContentLength() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setEntity(new BasicHttpEntity(EmptyInputStream.INSTANCE, null));
         final ResponseContent interceptor = new ResponseContent();
         interceptor.process(response, response.getEntity(), context);
         final Header h1 = response.getFirstHeader(HttpHeaders.TRANSFER_ENCODING);
         Assert.assertNotNull(h1);
         Assert.assertEquals("chunked", h1.getValue());
         final Header h2 = response.getFirstHeader(HttpHeaders.CONTENT_LENGTH);
         Assert.assertNull(h2);
     }
 
     @Test
     public void testResponseContentEntityChunkedHTTP10() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         context.setProtocolVersion(HttpVersion.HTTP_1_0);
         final BasicClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setEntity(new BasicHttpEntity(EmptyInputStream.INSTANCE, null, true));
         final ResponseContent interceptor = new ResponseContent();
         interceptor.process(response, response.getEntity(), context);
         final Header h1 = response.getFirstHeader(HttpHeaders.TRANSFER_ENCODING);
         Assert.assertNull(h1);
         final Header h2 = response.getFirstHeader(HttpHeaders.CONTENT_LENGTH);
         Assert.assertNull(h2);
     }
 
     @Test
     public void testResponseContentEntityNoContentTypeAndEncoding() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setEntity(new BasicHttpEntity(EmptyInputStream.INSTANCE, null));
         final ResponseContent interceptor = new ResponseContent();
         interceptor.process(response, response.getEntity(), context);
         final Header h1 = response.getFirstHeader(HttpHeaders.CONTENT_TYPE);
         Assert.assertNull(h1);
         final Header h2 = response.getFirstHeader(HttpHeaders.CONTENT_ENCODING);
         Assert.assertNull(h2);
     }
 
     @Test
     public void testResponseContentEntityContentTypeAndEncoding() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setEntity(new BasicHttpEntity(EmptyInputStream.INSTANCE,
                 ContentType.parseLenient("whatever"), "whatever"));
         final ResponseContent interceptor = new ResponseContent();
         interceptor.process(response, response.getEntity(), context);
         final Header h1 = response.getFirstHeader(HttpHeaders.CONTENT_TYPE);
         Assert.assertNotNull(h1);
         Assert.assertEquals("whatever", h1.getValue());
         final Header h2 = response.getFirstHeader(HttpHeaders.CONTENT_ENCODING);
         Assert.assertNotNull(h2);
         Assert.assertEquals("whatever", h2.getValue());
     }
 
     @Test
     public void testResponseContentInvalidInput() throws Exception {
         final ResponseContent interceptor = new ResponseContent();
         try {
             interceptor.process(null, null, null);
             Assert.fail("NullPointerException should have been thrown");
         } catch (final NullPointerException ex) {
             // expected
         }
     }
 
     @Test
     public void testResponseContentInvalidResponseState() throws Exception {
         final ResponseContent interceptor = new ResponseContent();
         final HttpContext context = new BasicHttpContext(null);
         try {
             final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
             response.addHeader(new BasicHeader(HttpHeaders.CONTENT_LENGTH, "10"));
             interceptor.process(response, response.getEntity(), context);
             Assert.fail("ProtocolException should have been thrown");
         } catch (final ProtocolException ex) {
             // expected
         }
         try {
             final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
             response.addHeader(new BasicHeader(HttpHeaders.TRANSFER_ENCODING, "stuff"));
             interceptor.process(response, response.getEntity(), context);
             Assert.fail("ProtocolException should have been thrown");
         } catch (final ProtocolException ex) {
             // expected
         }
     }
 
     @Test
     public void testResponseContentOverwriteHeaders() throws Exception {
         final ResponseContent interceptor = new ResponseContent(true);
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.addHeader(new BasicHeader(HttpHeaders.CONTENT_LENGTH, "10"));
         response.addHeader(new BasicHeader(HttpHeaders.TRANSFER_ENCODING, "whatever"));
         interceptor.process(response, response.getEntity(), context);
         Assert.assertEquals("0", response.getFirstHeader(HttpHeaders.CONTENT_LENGTH).getValue());
     }
 
     @Test
     public void testResponseContentAddHeaders() throws Exception {
         final ResponseContent interceptor = new ResponseContent(true);
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         interceptor.process(response, response.getEntity(), context);
         Assert.assertEquals("0", response.getFirstHeader(HttpHeaders.CONTENT_LENGTH).getValue());
         Assert.assertNull(response.getFirstHeader(HttpHeaders.TRANSFER_ENCODING));
     }
 
     @Test
     public void testResponseContentEntityWithTrailers() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setEntity(HttpEntities.create("whatever", StandardCharsets.US_ASCII,
                 new BasicHeader("h1", "this"), new BasicHeader("h1", "that"), new BasicHeader("h2", "this and that")));
 
         final ResponseContent interceptor = new ResponseContent();
         interceptor.process(response, response.getEntity(), context);
         final Header header1 = response.getFirstHeader(HttpHeaders.TRANSFER_ENCODING);
         Assert.assertNotNull(header1);
         final Header header2 = response.getFirstHeader(HttpHeaders.TRAILER);
         Assert.assertNotNull(header2);
         Assert.assertEquals("h1, h2", header2.getValue());
     }
 
     @Test
     public void testResponseDateGenerated() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         final ResponseDate interceptor = new ResponseDate();
         interceptor.process(response, response.getEntity(), context);
         final Header h1 = response.getFirstHeader(HttpHeaders.DATE);
         Assert.assertNotNull(h1);
         interceptor.process(response, response.getEntity(), context);
         final Header h2 = response.getFirstHeader(HttpHeaders.DATE);
         Assert.assertNotNull(h2);
     }
 
     @Test
     public void testResponseDateNotGenerated() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.setCode(199);
         final ResponseDate interceptor = new ResponseDate();
         interceptor.process(response, response.getEntity(), context);
         final Header h1 = response.getFirstHeader(HttpHeaders.DATE);
         Assert.assertNull(h1);
     }
 
     @Test
     public void testResponseDateInvalidInput() throws Exception {
         final ResponseDate interceptor = new ResponseDate();
         try {
             interceptor.process(null, null, null);
             Assert.fail("NullPointerException should have been thrown");
         } catch (final NullPointerException ex) {
             // expected
         }
     }
 
     @Test
     public void testRequestDateGenerated() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/");
         request.setEntity(new StringEntity("stuff"));
 
         final RequestDate interceptor = new RequestDate();
         interceptor.process(request, request.getEntity(), context);
         final Header h1 = request.getFirstHeader(HttpHeaders.DATE);
         Assert.assertNotNull(h1);
         interceptor.process(request, request.getEntity(), context);
         final Header h2 = request.getFirstHeader(HttpHeaders.DATE);
         Assert.assertNotNull(h2);
     }
 
     @Test
     public void testRequestDateNotGenerated() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
 
         final RequestDate interceptor = new RequestDate();
         interceptor.process(request, request.getEntity(), context);
         final Header h1 = request.getFirstHeader(HttpHeaders.DATE);
         Assert.assertNull(h1);
     }
 
     @Test
     public void testRequestDateInvalidInput() throws Exception {
         final RequestDate interceptor = new RequestDate();
         try {
             interceptor.process(null, null, null);
             Assert.fail("NullPointerException should have been thrown");
         } catch (final NullPointerException ex) {
             // expected
         }
     }
 
     @Test
     public void testResponseServerGenerated() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         final ResponseServer interceptor = new ResponseServer("some server");
         interceptor.process(response, response.getEntity(), context);
         final Header h1 = response.getFirstHeader(HttpHeaders.SERVER);
         Assert.assertNotNull(h1);
         Assert.assertEquals("some server", h1.getValue());
     }
 
     @Test
     public void testResponseServerNotGenerated() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         response.addHeader(new BasicHeader(HttpHeaders.SERVER, "whatever"));
         final ResponseServer interceptor = new ResponseServer("some server");
         interceptor.process(response, response.getEntity(), context);
         final Header h1 = response.getFirstHeader(HttpHeaders.SERVER);
         Assert.assertNotNull(h1);
         Assert.assertEquals("whatever", h1.getValue());
     }
 
     @Test
     public void testResponseServerMissing() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final ClassicHttpResponse response = new BasicClassicHttpResponse(HttpStatus.SC_OK, "OK");
         final ResponseServer interceptor = new ResponseServer();
         interceptor.process(response, response.getEntity(), context);
         final Header h1 = response.getFirstHeader(HttpHeaders.SERVER);
         Assert.assertNull(h1);
     }
 
     @Test
     public void testResponseServerInvalidInput() throws Exception {
         final ResponseServer interceptor = new ResponseServer();
         try {
             interceptor.process(null, null, null);
             Assert.fail("NullPointerException should have been thrown");
         } catch (final NullPointerException ex) {
             // expected
         }
     }
 
     @Test
     public void testRequestHttp10HostHeaderAbsent() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         request.setVersion(HttpVersion.HTTP_1_0);
         final RequestValidateHost interceptor = new RequestValidateHost();
         interceptor.process(request, request.getEntity(), context);
     }
 
     @Test
     public void testRequestHttpHostHeader() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         request.setVersion(HttpVersion.HTTP_1_1);
         request.setHeader(HttpHeaders.HOST, "host:8888");
         final RequestValidateHost interceptor = new RequestValidateHost();
         interceptor.process(request, request.getEntity(), context);
         Assert.assertEquals(new URIAuthority("host", 8888), request.getAuthority());
     }
 
     @Test
     public void testRequestHttpHostHeaderNoPort() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         request.setVersion(HttpVersion.HTTP_1_1);
         request.setHeader(HttpHeaders.HOST, "host");
         final RequestValidateHost interceptor = new RequestValidateHost();
         interceptor.process(request, request.getEntity(), context);
         Assert.assertEquals(new URIAuthority("host"), request.getAuthority());
     }
 
     @Test
     public void testRequestHttp11HostHeaderPresent() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         request.setHeader(HttpHeaders.HOST, "blah");
         final RequestValidateHost interceptor = new RequestValidateHost();
         interceptor.process(request, request.getEntity(), context);
     }
 
     @Test(expected = ProtocolException.class)
     public void testRequestHttp11HostHeaderAbsent() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         final RequestValidateHost interceptor = new RequestValidateHost();
         interceptor.process(request, request.getEntity(), context);
     }
 
     @Test(expected = ProtocolException.class)
     public void testRequestHttp11MultipleHostHeaders() throws Exception {
         final HttpContext context = new BasicHttpContext(null);
         final BasicClassicHttpRequest request = new BasicClassicHttpRequest(Method.GET, "/");
         request.addHeader(HttpHeaders.HOST, "blah");
         request.addHeader(HttpHeaders.HOST, "blah");
         final RequestValidateHost interceptor = new RequestValidateHost();
         interceptor.process(request, request.getEntity(), context);
     }
 
 }