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    * "License"); you may not use this file except in compliance
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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.async;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  
  import java.util.LinkedList;
  import java.util.Queue;
  import java.util.Random;
  import java.util.concurrent.Future;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.hc.client5.http.impl.async.MinimalHttpAsyncClient;
  import org.apache.hc.client5.http.protocol.HttpClientContext;
  import org.apache.hc.core5.http.ContentType;
  import org.apache.hc.core5.http.HttpHost;
  import org.apache.hc.core5.http.HttpResponse;
  import org.apache.hc.core5.http.Message;
  import org.apache.hc.core5.http.Method;
  import org.apache.hc.core5.http.URIScheme;
  import org.apache.hc.core5.http.config.Http1Config;
  import org.apache.hc.core5.http.nio.AsyncClientEndpoint;
  import org.apache.hc.core5.http.nio.entity.AsyncEntityProducers;
  import org.apache.hc.core5.http.nio.entity.BasicAsyncEntityConsumer;
  import org.apache.hc.core5.http.nio.support.BasicRequestProducer;
  import org.apache.hc.core5.http.nio.support.BasicResponseConsumer;
  import org.apache.hc.core5.http2.config.H2Config;
  import org.apache.hc.core5.reactive.ReactiveServerExchangeHandler;
  import org.apache.hc.core5.testing.nio.H2TestServer;
  import org.apache.hc.core5.testing.reactive.ReactiveEchoProcessor;
  import org.hamcrest.CoreMatchers;
  import org.junit.jupiter.api.Test;
  
  public abstract class TestHttp1ReactiveMinimal extends AbstractHttpReactiveFundamentalsTest<MinimalHttpAsyncClient> {
  
      public TestHttp1ReactiveMinimal(final URIScheme scheme) {
          super(scheme);
      }
  
      @Override
      protected H2TestServer startServer() throws Exception {
          return startServer(Http1Config.DEFAULT, null, null);
      }
  
      @Override
      protected MinimalHttpAsyncClient startClient() throws Exception {
          return startMinimalClient(
                  Http1Config.DEFAULT,
                  H2Config.DEFAULT,
                  b -> {});
      }
  
      @Test
      public void testConcurrentPostRequestsSameEndpoint() throws Exception {
          final H2TestServer server = startServer();
          server.register("/echo/*", () ->
                  new ReactiveServerExchangeHandler(new ReactiveEchoProcessor()));
          final HttpHost target = targetHost();
  
          final MinimalHttpAsyncClient client = startClient();
  
          final byte[] b1 = new byte[1024];
          final Random rnd = new Random(System.currentTimeMillis());
          rnd.nextBytes(b1);
  
          final int reqCount = 20;
  
          final Future<AsyncClientEndpoint> endpointLease = client.lease(target, null);
          final AsyncClientEndpoint endpoint = endpointLease.get(5, TimeUnit.SECONDS);
          try {
              final Queue<Future<Message<HttpResponse, byte[]>>> queue = new LinkedList<>();
              for (int i = 0; i < reqCount; i++) {
                  final Future<Message<HttpResponse, byte[]>> future = endpoint.execute(
                          new BasicRequestProducer(Method.GET, target, "/echo/",
                                  AsyncEntityProducers.create(b1, ContentType.APPLICATION_OCTET_STREAM)),
                         new BasicResponseConsumer<>(new BasicAsyncEntityConsumer()), HttpClientContext.create(), null);
                 queue.add(future);
             }
             while (!queue.isEmpty()) {
                 final Future<Message<HttpResponse, byte[]>> future = queue.remove();
                 final Message<HttpResponse, byte[]> responseMessage = future.get();
                 assertThat(responseMessage, CoreMatchers.notNullValue());
                 final HttpResponse response = responseMessage.getHead();
                 assertThat(response.getCode(), CoreMatchers.equalTo(200));
                 final byte[] b2 = responseMessage.getBody();
                 assertThat(b1, CoreMatchers.equalTo(b2));
                 endpoint.releaseAndReuse();
             }
         } finally {
             endpoint.releaseAndDiscard();
         }
 
     }
 
 }