code: /*
   * Copyright (c) 2022 Airbyte, Inc., all rights reserved.
   */
  
  package io.airbyte.commons.concurrency;
  
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.verify;
  
  import java.time.Duration;
  import java.util.concurrent.ExecutorService;
  import org.junit.jupiter.api.Test;
  
  class GracefulShutdownHandlerTest {
  
    @Test
    void testRun() throws InterruptedException {
      final ExecutorService executorService = mock(ExecutorService.class);
      final GracefulShutdownHandler gracefulShutdownHandler = new GracefulShutdownHandler(Duration.ofSeconds(30), executorService);
      gracefulShutdownHandler.start();
      gracefulShutdownHandler.join();
  
      verify(executorService).shutdown();
    }
  
  }
  