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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
   *
   *   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.
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   *
   * 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.testing.async;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  
  import java.util.concurrent.Future;
  import java.util.concurrent.atomic.AtomicReference;
  
  import org.apache.hc.client5.http.async.methods.SimpleHttpResponse;
  import org.apache.hc.client5.http.async.methods.SimpleRequestBuilder;
  import org.apache.hc.client5.http.config.TlsConfig;
  import org.apache.hc.client5.http.impl.async.CloseableHttpAsyncClient;
  import org.apache.hc.core5.http.HttpHost;
  import org.apache.hc.core5.http.HttpVersion;
  import org.apache.hc.core5.http.ProtocolVersion;
  import org.apache.hc.core5.http.URIScheme;
  import org.apache.hc.core5.http.config.Http1Config;
  import org.apache.hc.core5.http2.HttpVersionPolicy;
  import org.apache.hc.core5.http2.config.H2Config;
  import org.apache.hc.core5.testing.nio.H2TestServer;
  import org.hamcrest.CoreMatchers;
  import org.junit.jupiter.api.Test;
  
  public abstract class TestHttpAsyncProtocolPolicy extends AbstractIntegrationTestBase {
  
      private final HttpVersion version;
  
      public TestHttpAsyncProtocolPolicy(final URIScheme scheme, final HttpVersion version) {
          super(scheme);
          this.version = version;
      }
  
      @Test
      public void testRequestContext() throws Exception {
          final H2TestServer server;
          if (version.greaterEquals(HttpVersion.HTTP_2)) {
              server = startServer(H2Config.DEFAULT, null, null);
          } else {
              server = startServer(Http1Config.DEFAULT, null, null);
          }
          server.register("/random/*", AsyncRandomHandler::new);
          final HttpHost target = targetHost();
  
          final AtomicReference<ProtocolVersion> versionRef = new AtomicReference<>();
          final CloseableHttpAsyncClient client = startClient(
                  builder -> builder
                          .setDefaultTlsConfig(TlsConfig.custom()
                                  .setVersionPolicy(version.greaterEquals(HttpVersion.HTTP_2) ? HttpVersionPolicy.FORCE_HTTP_2 : HttpVersionPolicy.FORCE_HTTP_1)
                                  .build()),
                  builder -> builder
                          .addRequestInterceptorFirst((request, entity, context) ->
                                  versionRef.set(context.getProtocolVersion())
                          ));
  
          final Future<SimpleHttpResponse> future = client.execute(
                  SimpleRequestBuilder.get()
                          .setHttpHost(target)
                          .setPath("/random/2048")
                          .build(), null);
          final SimpleHttpResponse response = future.get();
          assertThat(response, CoreMatchers.notNullValue());
          assertThat(response.getCode(), CoreMatchers.equalTo(200));
          final String body = response.getBodyText();
          assertThat(body, CoreMatchers.notNullValue());
          assertThat(body.length(), CoreMatchers.equalTo(2048));
          assertThat(versionRef.get(), CoreMatchers.equalTo(version));
      }
  
  }