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   * 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
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  package org.apache.beam.runners.core.metrics;
  
  import java.util.HashMap;
  import org.apache.beam.sdk.metrics.MetricsEnvironment;
  import org.junit.Assert;
  import org.junit.Test;
  
  public class ServiceCallMetricTest {
  
    @Test
    public void testCall() {
      // Test that its on the ProcessWideMetricContainer.
      MetricsContainerImpl container = new MetricsContainerImpl(null);
      MetricsEnvironment.setProcessWideContainer(container);
  
      String urn = MonitoringInfoConstants.Urns.API_REQUEST_COUNT;
      HashMap<String, String> labels = new HashMap<String, String>();
      labels.put("key", "value");
      ServiceCallMetric metric =
          new ServiceCallMetric(MonitoringInfoConstants.Urns.API_REQUEST_COUNT, labels);
  
      // Http Status Code
      metric.call(200);
      labels.put(MonitoringInfoConstants.Labels.STATUS, "ok");
      MonitoringInfoMetricName name = MonitoringInfoMetricName.named(urn, labels);
      Assert.assertEquals(1, (long) container.getCounter(name).getCumulative());
  
      // Normalize the status by lower casing and mapping to a canonical name with underscores.
      metric.call("notFound");
      labels.put(MonitoringInfoConstants.Labels.STATUS, "not_found");
      name = MonitoringInfoMetricName.named(urn, labels);
      Assert.assertEquals(1, (long) container.getCounter(name).getCumulative());
  
      // Normalize the status by lower casing and mapping to a canonical name with underscores.
      metric.call("PERMISSIONDENIED");
      labels.put(MonitoringInfoConstants.Labels.STATUS, "permission_denied");
      name = MonitoringInfoMetricName.named(urn, labels);
      Assert.assertEquals(1, (long) container.getCounter(name).getCumulative());
  
      // Accept other string codes passed in, even if they aren't in the canonical map.
      metric.call("something_else");
      labels.put(MonitoringInfoConstants.Labels.STATUS, "something_else");
      name = MonitoringInfoMetricName.named(urn, labels);
      Assert.assertEquals(1, (long) container.getCounter(name).getCumulative());
  
      // Map unknown numeric codes to "unknown"
      metric.call(123);
      labels.put(MonitoringInfoConstants.Labels.STATUS, "unknown");
      name = MonitoringInfoMetricName.named(urn, labels);
      Assert.assertEquals(1, (long) container.getCounter(name).getCumulative());
    }
  }
  