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;
  
  /** Tests for {@link GaugeCell}. */
  public class GaugeCellTest {
    private GaugeCell cell = new GaugeCell(MetricName.named("hello", "world"));
  
    @Test
    public void testDeltaAndCumulative() {
      cell.set(5);
      cell.set(7);
      assertThat(cell.getCumulative().value(), equalTo(GaugeData.create(7).value()));
      assertThat("getCumulative is idempotent", cell.getCumulative().value(), equalTo(7L));
  
      assertThat(cell.getDirty().beforeCommit(), equalTo(true));
      cell.getDirty().afterCommit();
      assertThat(cell.getDirty().beforeCommit(), equalTo(false));
  
      cell.set(30);
      assertThat(cell.getCumulative().value(), equalTo(30L));
  
      assertThat(
          "Adding a new value made the cell dirty", cell.getDirty().beforeCommit(), equalTo(true));
    }
  
    @Test
    public void testEquals() {
      GaugeCell gaugeCell = new GaugeCell(MetricName.named("namespace", "name"));
      GaugeCell equal = new GaugeCell(MetricName.named("namespace", "name"));
      Assert.assertEquals(gaugeCell, equal);
      Assert.assertEquals(gaugeCell.hashCode(), equal.hashCode());
    }
  
    @Test
    public void testNotEquals() {
      GaugeCell gaugeCell = new GaugeCell(MetricName.named("namespace", "name"));
  
      Assert.assertNotEquals(gaugeCell, new Object());
  
      GaugeCell differentDirty = new GaugeCell(MetricName.named("namespace", "name"));
      differentDirty.getDirty().afterModification();
      Assert.assertNotEquals(gaugeCell, differentDirty);
      Assert.assertNotEquals(gaugeCell.hashCode(), differentDirty.hashCode());
  
      GaugeCell differentGaugeValue = new GaugeCell(MetricName.named("namespace", "name"));
      differentGaugeValue.update(GaugeData.create(1));
      Assert.assertNotEquals(gaugeCell, differentGaugeValue);
      Assert.assertNotEquals(gaugeCell.hashCode(), differentGaugeValue.hashCode());
  
      GaugeCell differentName = new GaugeCell(MetricName.named("DIFFERENT", "DIFFERENT"));
      Assert.assertNotEquals(gaugeCell, differentName);
      Assert.assertNotEquals(gaugeCell.hashCode(), differentName.hashCode());
    }
  
    @Test
    public void testReset() {
      GaugeCell gaugeCell = new GaugeCell(MetricName.named("namespace", "name"));
      gaugeCell.set(2);
      Assert.assertNotEquals(gaugeCell.getDirty(), new DirtyState());
      assertThat(gaugeCell.getCumulative().value(), equalTo(GaugeData.create(2).value()));
  
      gaugeCell.reset();
      assertThat(gaugeCell.getCumulative(), equalTo(GaugeData.empty()));
      assertThat(gaugeCell.getDirty(), equalTo(new DirtyState()));
    }
  }
  