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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,
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   * "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.core5.testing.classic;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  
  import java.io.IOException;
  
  import org.apache.hc.core5.http.ClassicHttpRequest;
  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.HttpException;
  import org.apache.hc.core5.http.HttpHost;
  import org.apache.hc.core5.http.HttpStatus;
  import org.apache.hc.core5.http.Method;
  import org.apache.hc.core5.http.URIScheme;
  import org.apache.hc.core5.http.impl.bootstrap.HttpRequester;
  import org.apache.hc.core5.http.impl.bootstrap.HttpServer;
  import org.apache.hc.core5.http.io.HttpFilterChain;
  import org.apache.hc.core5.http.io.SocketConfig;
  import org.apache.hc.core5.http.io.entity.StringEntity;
  import org.apache.hc.core5.http.message.BasicClassicHttpRequest;
  import org.apache.hc.core5.http.protocol.HttpCoreContext;
  import org.apache.hc.core5.testing.classic.extension.HttpRequesterResource;
  import org.apache.hc.core5.testing.classic.extension.HttpServerResource;
  import org.apache.hc.core5.util.Timeout;
  import org.hamcrest.CoreMatchers;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.RegisterExtension;
  
  public abstract class ClassicServerBootstrapFilterTest {
  
      private static final Timeout TIMEOUT = Timeout.ofMinutes(1);
  
      private final URIScheme scheme;
  
      @RegisterExtension
      private final HttpServerResource serverResource;
  
      @RegisterExtension
      private final HttpRequesterResource clientResource;
  
      public ClassicServerBootstrapFilterTest(final URIScheme scheme) {
          this.scheme = scheme;
          this.serverResource = new HttpServerResource(scheme, bootstrap -> bootstrap
                  .setSocketConfig(SocketConfig.custom()
                          .setSoTimeout(TIMEOUT)
                          .build())
                  .register("*", new EchoHandler())
                  .addFilterLast("test-filter", (request, responseTrigger, context, chain) ->
                          chain.proceed(request, new HttpFilterChain.ResponseTrigger() {
  
                              @Override
                              public void sendInformation(
                                      final ClassicHttpResponse response) throws HttpException, IOException {
                                  responseTrigger.sendInformation(response);
                              }
  
                              @Override
                              public void submitResponse(
                                      final ClassicHttpResponse response) throws HttpException, IOException {
                                  response.setHeader("X-Test-Filter", "active");
                                  responseTrigger.submitResponse(response);
                              }
  
                          }, context)));
  
          this.clientResource = new HttpRequesterResource(bootstrap -> bootstrap
                  .setSocketConfig(SocketConfig.custom()
                          .setSoTimeout(TIMEOUT)
                          .build()));
      }
  
     @Test
     public void testFilters() throws Exception {
         final HttpServer server = serverResource.start();
         final HttpRequester requester = clientResource.start();
 
         server.start();
         final HttpHost target = new HttpHost(scheme.id, "localhost", server.getLocalPort());
         final HttpCoreContext context = HttpCoreContext.create();
         final ClassicHttpRequest request = new BasicClassicHttpRequest(Method.POST, "/filters");
         request.setEntity(new StringEntity("some stuff", ContentType.TEXT_PLAIN));
         try (final ClassicHttpResponse response = requester.execute(target, request, TIMEOUT, context)) {
             assertThat(response.getCode(), CoreMatchers.equalTo(HttpStatus.SC_OK));
             final Header testFilterHeader = response.getHeader("X-Test-Filter");
             assertThat(testFilterHeader, CoreMatchers.notNullValue());
         }
     }
 
 }