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 com.alibaba.metrics;
  
  import org.junit.Assert;
  import org.junit.Test;
  
  public class RatioGaugeTest {
  
      @Test
      public void testRatioGauge() {
  
          MetricRegistry registry = new MetricRegistryImpl();
          final Counter total = registry.counter(MetricName.build("test.total"));
          final Counter success = registry.counter(MetricName.build("test.success"));
          total.inc(5);
          success.inc(3);
          RatioGauge successRateGuage = new RatioGauge() {
              @Override
              protected Ratio getRatio() {
                  return Ratio.of(success.getCount(), total.getCount());
              }
          };
  
          registry.register(MetricName.build("test.success_rate"), successRateGuage);
  
          Assert.assertEquals(0.6d, successRateGuage.getValue().doubleValue(), 0.00001d);
      }
  
      public void testRatioGauge2() {
          final Counter total = MetricManager.getCounter("test", MetricName.build("test.total"));
          final Counter success = MetricManager.getCounter("test", MetricName.build("test.success"));
          total.inc(5);
          success.inc(3);
          RatioGauge successRateGuage = new RatioGauge() {
              @Override
              protected Ratio getRatio() {
                  return Ratio.of(success.getCount(), total.getCount());
              }
          };
  
          MetricManager.register("test", MetricName.build("test.success_rate"), successRateGuage);
  
          Assert.assertEquals(0.6d, successRateGuage.getValue().doubleValue(), 0.00001d);
      }
  }
  