content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.master.service.metrics;
  
  import alluxio.conf.Configuration;
  import alluxio.conf.PropertyKey;
  import alluxio.metrics.MetricsSystem;
  
  import org.junit.Assert;
  import org.junit.Test;
  
  /**
   * Tests for Metrics simple service.
   */
  public class MetricsServiceTest {
    @Test
    public void alwaysOnTest() {
      Configuration.set(PropertyKey.STANDBY_MASTER_METRICS_SINK_ENABLED, true);
      MetricsService service = MetricsService.Factory.create();
      Assert.assertTrue(service instanceof AlwaysOnMetricsService);
  
      Assert.assertFalse(MetricsSystem.isStarted());
      service.start();
      Assert.assertTrue(MetricsSystem.isStarted());
      for (int i = 0; i < 5; i++) {
        // the metrics should always be on, regardless of being in PRIMARY or STANDBY state
        service.promote();
        Assert.assertTrue(MetricsSystem.isStarted());
        service.demote();
        Assert.assertTrue(MetricsSystem.isStarted());
      }
      service.stop();
      Assert.assertFalse(MetricsSystem.isStarted());
    }
  
    @Test
    public void whenLeadingTest() {
      Configuration.set(PropertyKey.STANDBY_MASTER_METRICS_SINK_ENABLED, false);
      MetricsService service = MetricsService.Factory.create();
      Assert.assertTrue(service instanceof PrimaryOnlyMetricsService);
  
      Assert.assertFalse(MetricsSystem.isStarted());
      service.start();
      Assert.assertFalse(MetricsSystem.isStarted());
      for (int i = 0; i < 5; i++) {
        service.promote();
        Assert.assertTrue(MetricsSystem.isStarted());
        service.demote();
        Assert.assertFalse(MetricsSystem.isStarted());
      }
      service.stop();
      Assert.assertFalse(MetricsSystem.isStarted());
    }
  }
  