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.beam.runners.core.metrics;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.equalTo;
  
  import org.apache.beam.sdk.metrics.MetricName;
  import org.junit.Assert;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link DistributionCell}. */
  @RunWith(JUnit4.class)
  public class DistributionCellTest {
    private DistributionCell cell = new DistributionCell(MetricName.named("hello", "world"));
  
    @Test
    public void testDeltaAndCumulative() {
      cell.update(5);
      cell.update(7);
      assertThat(cell.getCumulative(), equalTo(DistributionData.create(12, 2, 5, 7)));
      assertThat(
          "getCumulative is idempotent",
          cell.getCumulative(),
          equalTo(DistributionData.create(12, 2, 5, 7)));
  
      assertThat(cell.getDirty().beforeCommit(), equalTo(true));
      cell.getDirty().afterCommit();
      assertThat(cell.getDirty().beforeCommit(), equalTo(false));
  
      cell.update(30);
      assertThat(cell.getCumulative(), equalTo(DistributionData.create(42, 3, 5, 30)));
  
      assertThat(
          "Adding a new value made the cell dirty", cell.getDirty().beforeCommit(), equalTo(true));
    }
  
    @Test
    public void testEquals() {
      DistributionCell distributionCell = new DistributionCell(MetricName.named("namespace", "name"));
      DistributionCell equal = new DistributionCell(MetricName.named("namespace", "name"));
      Assert.assertEquals(distributionCell, equal);
      Assert.assertEquals(distributionCell.hashCode(), equal.hashCode());
    }
  
    @Test
    public void testNotEquals() {
      DistributionCell distributionCell = new DistributionCell(MetricName.named("namespace", "name"));
  
      Assert.assertNotEquals(distributionCell, new Object());
  
      DistributionCell differentDirty = new DistributionCell(MetricName.named("namespace", "name"));
      differentDirty.getDirty().afterModification();
      Assert.assertNotEquals(distributionCell, differentDirty);
      Assert.assertNotEquals(distributionCell.hashCode(), differentDirty.hashCode());
  
      DistributionCell differentValue = new DistributionCell(MetricName.named("namespace", "name"));
      differentValue.update(DistributionData.create(1, 1, 1, 1));
      Assert.assertNotEquals(distributionCell, differentValue);
      Assert.assertNotEquals(distributionCell.hashCode(), differentValue.hashCode());
  
      DistributionCell differentName =
          new DistributionCell(MetricName.named("DIFFERENT", "DIFFERENT"));
      Assert.assertNotEquals(distributionCell, differentName);
      Assert.assertNotEquals(distributionCell.hashCode(), differentName.hashCode());
    }
  
    @Test
    public void testReset() {
      DistributionCell distributionCell = new DistributionCell(MetricName.named("namespace", "name"));
      distributionCell.update(2);
      assertThat(distributionCell.getCumulative(), equalTo(DistributionData.create(2, 1, 2, 2)));
      Assert.assertNotEquals(distributionCell.getDirty(), new DirtyState());
  
      distributionCell.reset();
      assertThat(distributionCell.getCumulative(), equalTo(DistributionData.EMPTY));
      assertThat(distributionCell.getDirty(), equalTo(new DirtyState()));
    }
  }
  