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.block;
  
  import static org.junit.Assert.assertEquals;
  import static org.mockito.Mockito.when;
  
  import alluxio.Constants;
  import alluxio.DefaultStorageTierAssoc;
  import alluxio.StorageTierAssoc;
  import alluxio.master.block.DefaultBlockMaster.Metrics;
  import alluxio.metrics.MetricInfo;
  import alluxio.metrics.MetricKey;
  import alluxio.metrics.MetricsSystem;
  
  import com.google.common.collect.ImmutableMap;
  import com.google.common.collect.Lists;
  import org.junit.Before;
  import org.junit.Test;
  import org.mockito.Mockito;
  
  /**
   * Unit tests for {@link DefaultBlockMaster.Metrics}.
   */
  public final class BlockMasterMetricsTest {
    private static final String MEM = Constants.MEDIUM_MEM;
    private static final String HDD = Constants.MEDIUM_HDD;
  
    private DefaultBlockMaster mBlockMaster;
  
    @Before
    public void before() throws Exception {
      MetricsSystem.clearAllMetrics();
      mBlockMaster = Mockito.mock(DefaultBlockMaster.class);
      StorageTierAssoc assoc = new DefaultStorageTierAssoc(Lists.newArrayList(MEM, HDD));
      when(mBlockMaster.getGlobalStorageTierAssoc()).thenReturn(assoc);
      Metrics.registerGauges(mBlockMaster);
    }
  
    @Test
    public void testMetricsCapacity() {
      when(mBlockMaster.getCapacityBytes()).thenReturn(1000L);
      assertEquals(1000L, getGauge(MetricKey.CLUSTER_CAPACITY_TOTAL.getName()));
      when(mBlockMaster.getUsedBytes()).thenReturn(200L);
      assertEquals(200L, getGauge(MetricKey.CLUSTER_CAPACITY_USED.getName()));
      assertEquals(800L, getGauge(MetricKey.CLUSTER_CAPACITY_FREE.getName()));
    }
  
    @Test
    public void testMetricsTierCapacity() {
      when(mBlockMaster.getTotalBytesOnTiers()).thenReturn(ImmutableMap.of(MEM, 1000L, HDD, 2000L));
      when(mBlockMaster.getUsedBytesOnTiers()).thenReturn(ImmutableMap.of(MEM, 100L, HDD, 200L));
      assertEquals(1000L,
          getGauge(MetricKey.CLUSTER_CAPACITY_TOTAL.getName() + MetricInfo.TIER + MEM));
      assertEquals(2000L,
          getGauge(MetricKey.CLUSTER_CAPACITY_TOTAL.getName() + MetricInfo.TIER + HDD));
      assertEquals(100L,
          getGauge(MetricKey.CLUSTER_CAPACITY_USED.getName() + MetricInfo.TIER + MEM));
      assertEquals(200L,
          getGauge(MetricKey.CLUSTER_CAPACITY_USED.getName() + MetricInfo.TIER + HDD));
      assertEquals(900L,
          getGauge(MetricKey.CLUSTER_CAPACITY_FREE.getName() + MetricInfo.TIER + MEM));
      assertEquals(1800L,
          getGauge(MetricKey.CLUSTER_CAPACITY_FREE.getName() + MetricInfo.TIER + HDD));
    }
  
    @Test
    public void testSize() {
      when(mBlockMaster.getUniqueBlockCount()).thenReturn(100L);
      assertEquals(100L, getGauge(MetricKey.MASTER_UNIQUE_BLOCKS.getName()));
    }
  
    @Test
    public void testMetricWorkers() {
      when(mBlockMaster.getWorkerCount()).thenReturn(200);
      assertEquals(200, getGauge(MetricKey.CLUSTER_WORKERS.getName()));
    }
  
    private Object getGauge(String name) {
      return MetricsSystem.METRIC_REGISTRY.getGauges()
          .get(name).getValue();
    }
  }
  