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.clients.GroupRebalanceConfig;
  import org.apache.kafka.common.utils.MockTime;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import java.util.Optional;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  public class HeartbeatTest {
      private final int sessionTimeoutMs = 300;
      private final int heartbeatIntervalMs = 100;
      private final int maxPollIntervalMs = 900;
      private final MockTime time = new MockTime();
  
      private Heartbeat heartbeat;
  
      @BeforeEach
      public void setUp() {
          long retryBackoffMs = 10L;
          long retryBackoffMaxMs = 100L;
          GroupRebalanceConfig rebalanceConfig = new GroupRebalanceConfig(sessionTimeoutMs,
                                                                          maxPollIntervalMs,
                                                                          heartbeatIntervalMs,
                                                                          "group_id",
                                                                          Optional.empty(),
                                                                          null,
                                                                          retryBackoffMs,
                                                                          retryBackoffMaxMs,
                                                                          true);
          heartbeat = new Heartbeat(rebalanceConfig, time);
      }
  
      @Test
      public void testShouldHeartbeat() {
          heartbeat.sentHeartbeat(time.milliseconds());
          time.sleep((long) ((float) heartbeatIntervalMs * 1.1));
          assertTrue(heartbeat.shouldHeartbeat(time.milliseconds()));
      }
  
      @Test
      public void testShouldNotHeartbeat() {
          heartbeat.sentHeartbeat(time.milliseconds());
          time.sleep(heartbeatIntervalMs / 2);
          assertFalse(heartbeat.shouldHeartbeat(time.milliseconds()));
      }
  
      @Test
      public void testTimeToNextHeartbeat() {
          heartbeat.sentHeartbeat(time.milliseconds());
          assertEquals(heartbeatIntervalMs, heartbeat.timeToNextHeartbeat(time.milliseconds()));
  
          time.sleep(heartbeatIntervalMs);
          assertEquals(0, heartbeat.timeToNextHeartbeat(time.milliseconds()));
  
          time.sleep(heartbeatIntervalMs);
          assertEquals(0, heartbeat.timeToNextHeartbeat(time.milliseconds()));
      }
  
      @Test
      public void testSessionTimeoutExpired() {
          heartbeat.sentHeartbeat(time.milliseconds());
          time.sleep(sessionTimeoutMs + 5);
          assertTrue(heartbeat.sessionTimeoutExpired(time.milliseconds()));
      }
  
      @Test
      public void testResetSession() {
          heartbeat.sentHeartbeat(time.milliseconds());
          time.sleep(sessionTimeoutMs + 5);
          heartbeat.resetSessionTimeout();
          assertFalse(heartbeat.sessionTimeoutExpired(time.milliseconds()));
  
          // Resetting the session timeout should not reset the poll timeout
          time.sleep(maxPollIntervalMs + 1);
          heartbeat.resetSessionTimeout();
          assertTrue(heartbeat.pollTimeoutExpired(time.milliseconds()));
      }
  
      @Test
      public void testResetTimeouts() {
          time.sleep(maxPollIntervalMs);
          assertTrue(heartbeat.sessionTimeoutExpired(time.milliseconds()));
          assertEquals(0, heartbeat.timeToNextHeartbeat(time.milliseconds()));
          assertTrue(heartbeat.pollTimeoutExpired(time.milliseconds()));
  
          heartbeat.resetTimeouts();
          assertFalse(heartbeat.sessionTimeoutExpired(time.milliseconds()));
          assertEquals(heartbeatIntervalMs, heartbeat.timeToNextHeartbeat(time.milliseconds()));
          assertFalse(heartbeat.pollTimeoutExpired(time.milliseconds()));
      }
  
      @Test
      public void testPollTimeout() {
          assertFalse(heartbeat.pollTimeoutExpired(time.milliseconds()));
          time.sleep(maxPollIntervalMs / 2);
  
          assertFalse(heartbeat.pollTimeoutExpired(time.milliseconds()));
          time.sleep(maxPollIntervalMs / 2 + 1);
  
          assertTrue(heartbeat.pollTimeoutExpired(time.milliseconds()));
      }
  
  }
  