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    * Licensed to the Apache Software Foundation (ASF) under one
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    * 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
   *
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   * Unless required by applicable law or agreed to in writing,
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   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
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   *
   * This software consists of voluntary contributions made by many
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  package org.apache.hc.client5.testing.sync;
  
  import org.apache.hc.client5.http.classic.methods.HttpPost;
  import org.apache.hc.client5.testing.extension.sync.ClientProtocolLevel;
  import org.apache.hc.client5.testing.extension.sync.TestClient;
  import org.apache.hc.core5.http.ClassicHttpRequest;
  import org.apache.hc.core5.http.Header;
  import org.apache.hc.core5.http.HttpHost;
  import org.apache.hc.core5.http.HttpResponse;
  import org.apache.hc.core5.http.URIScheme;
  import org.apache.hc.core5.http.io.entity.EntityUtils;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  @SuppressWarnings("boxing") // test code
  public class TestHttpClientBuilderInterceptors extends AbstractIntegrationTestBase {
  
      public TestHttpClientBuilderInterceptors() {
          super(URIScheme.HTTP, ClientProtocolLevel.STANDARD);
      }
  
      @BeforeEach
      public void before() throws Exception {
          configureServer(bootstrap -> bootstrap
                  .register("/test", (request, response, context) -> {
                      final Header testInterceptorHeader = request.getHeader("X-Test-Interceptor");
                      if (testInterceptorHeader != null) {
                          response.setHeader(testInterceptorHeader);
                      }
                      response.setCode(200);
                  }));
          configureClient(builder -> builder
                  .addExecInterceptorLast("test-interceptor", (request, scope, chain) -> {
                      request.setHeader("X-Test-Interceptor", "active");
                      return chain.proceed(request, scope);
                  }));
      }
  
      @Test
      public void testAddExecInterceptorLastShouldBeExecuted() throws Exception {
          final HttpHost httpHost = startServer();
          final TestClient client = client();
          final ClassicHttpRequest request = new HttpPost("/test");
          final HttpResponse response = client.execute(httpHost, request, httpResponse -> {
              EntityUtils.consume(httpResponse.getEntity());
              return httpResponse;
          });
          Assertions.assertEquals(200, response.getCode());
          final Header testFilterHeader = response.getHeader("X-Test-Interceptor");
          Assertions.assertNotNull(testFilterHeader);
      }
  
  }