content: /*
   * 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.
   */
  package org.apache.kafka.clients.consumer.internals;
  
  import org.apache.kafka.common.utils.LogContext;
  
  import org.junit.jupiter.api.Test;
  
  import java.util.function.BiConsumer;
  
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  public class RequestStateTest {
      @Test
      public void testRequestStateSimple() {
          RequestState state = new RequestState(
                  new LogContext(),
                  this.getClass().getSimpleName(),
                  100,
                  2,
                  1000,
                  0);
  
          // ensure not permitting consecutive requests
          assertTrue(state.canSendRequest(0));
          state.onSendAttempt(0);
          assertFalse(state.canSendRequest(0));
          state.onFailedAttempt(35);
          assertTrue(state.canSendRequest(135));
          state.onFailedAttempt(140);
          assertFalse(state.canSendRequest(200));
          // exponential backoff
          assertTrue(state.canSendRequest(340));
  
          // test reset
          state.reset();
          assertTrue(state.canSendRequest(200));
      }
  
      @Test
      public void testTrackInflightOnSuccessfulAttempt() {
          testTrackInflight(RequestState::onSuccessfulAttempt);
      }
  
      @Test
      public void testTrackInflightOnFailedAttempt() {
          testTrackInflight(RequestState::onFailedAttempt);
      }
  
      private void testTrackInflight(BiConsumer<RequestState, Integer> onCompletedAttempt) {
          RequestState state = new RequestState(
                  new LogContext(),
                  this.getClass().getSimpleName(),
                  100,
                  2,
                  1000,
                  0);
  
          // Just to be safe, let's make sure a new RequestState object doesn't think it has
          // an in-flight request.
          assertFalse(state.requestInFlight());
  
          // When we've sent a request, the inflight flag should update from false to true.
          state.onSendAttempt(202);
          assertTrue(state.requestInFlight());
  
          // Now we've received the response.
          onCompletedAttempt.accept(state, 236);
          assertFalse(state.requestInFlight());
  
          // Even when we send a request with the same timestamp as the previous response's timestamp,
          // the flag should update from false to true.
          state.onSendAttempt(236);
          assertTrue(state.requestInFlight());
      }
  }
  