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.metrics;
  
  import org.apache.kafka.common.metrics.Metrics;
  import org.apache.kafka.common.utils.MockTime;
  import org.apache.kafka.common.utils.Time;
  
  import org.junit.jupiter.api.Test;
  
  import java.util.Random;
  import java.util.concurrent.TimeUnit;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  
  public class HeartbeatMetricsManagerTest {
      private final Time time = new MockTime();
      private final Metrics metrics = new Metrics(time);
  
      @Test
      public void testHeartbeatMetrics() {
          // Assuming 'metrics' is an instance of your Metrics class
          HeartbeatMetricsManager heartbeatMetricsManager = new HeartbeatMetricsManager(metrics);
  
          // Assert the existence of metrics
          assertNotNull(metrics.metric(heartbeatMetricsManager.heartbeatResponseTimeMax));
          assertNotNull(metrics.metric(heartbeatMetricsManager.heartbeatRate));
          assertNotNull(metrics.metric(heartbeatMetricsManager.heartbeatTotal));
  
          // Record heartbeat sent time and request latencies
          long currentTimeMs = time.milliseconds();
          heartbeatMetricsManager.recordHeartbeatSentMs(currentTimeMs);
          heartbeatMetricsManager.recordRequestLatency(100);
          heartbeatMetricsManager.recordRequestLatency(103);
          heartbeatMetricsManager.recordRequestLatency(102);
  
          // Assert recorded metrics values
          assertEquals(103d, metrics.metric(heartbeatMetricsManager.heartbeatResponseTimeMax).metricValue());
          assertEquals(0.1d, (double) metrics.metric(heartbeatMetricsManager.heartbeatRate).metricValue(), 0.01d);
          assertEquals(3d, metrics.metric(heartbeatMetricsManager.heartbeatTotal).metricValue());
  
          // Randomly sleep 1-10 seconds
          Random rand = new Random();
          int randomSleepS = rand.nextInt(10) + 1;
          time.sleep(TimeUnit.SECONDS.toMillis(randomSleepS));
          assertEquals((double) randomSleepS, metrics.metric(heartbeatMetricsManager.lastHeartbeatSecondsAgo).metricValue());
      }
  }
  