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.metrics;
  
  import static org.junit.Assert.assertEquals;
  
  import alluxio.grpc.MetricType;
  import alluxio.util.CommonUtils;
  
  import org.junit.Test;
  
  import java.util.Random;
  
  /**
   * Tests {@link Metric}.
   */
  public final class MetricTest {
  
    @Test
    public void proto() {
      Metric metric = createRandom();
      Metric other = Metric.fromProto(metric.toProto());
      checkEquality(metric, other);
    }
  
    @Test
    public void testFullNameParsing() {
      String fullName = "Client.metric.tag1:A::/.tag2:B:/.192_1_1_1|A";
      Metric metric = Metric.from(fullName, 1, MetricType.COUNTER);
      assertEquals(fullName, metric.getFullMetricName());
    }
  
    @Test
    public void testMetricNameWithTags() {
      assertEquals("metric.t1:v1.t2:v2:",
          Metric.getMetricNameWithTags("metric", "t1", "v1", "t2", "v2:"));
    }
  
    public void checkEquality(Metric a, Metric b) {
      assertEquals(a.getName(), b.getName());
      assertEquals(a.getInstanceType(), b.getInstanceType());
      assertEquals(a.getValue(), b.getValue(), 1e-15);
      assertEquals(a.getSource(), b.getSource());
      assertEquals(a.getFullMetricName(), b.getFullMetricName());
    }
  
    public static Metric createRandom() {
      Random random = new Random();
      int idx = random.nextInt(MetricsSystem.InstanceType.values().length);
      MetricsSystem.InstanceType instance = MetricsSystem.InstanceType.values()[idx];
      String hostname = CommonUtils.randomAlphaNumString(random.nextInt(10));
      String name = CommonUtils.randomAlphaNumString(random.nextInt(10));
      double value = random.nextLong();
      MetricType metricType = MetricType.forNumber(random.nextInt(MetricType.values().length));
      return new Metric(instance, hostname, metricType, name, value);
    }
  }
  