text: import os
  from metricbeat import BaseTest
  import unittest
  from nose.plugins.attrib import attr
  import urllib2
  import time
  
  
  class ConfigTest(BaseTest):
      def test_service_name(self):
          """
          Test setting service name
          """
          service_name = "testing"
          self.render_config_template(modules=[{
              # Do it with any module that don't set the service name by itself
              "name": "system",
              "metricsets": ["cpu"],
              "period": "5s",
              "extras": {
                  "service.name": service_name,
              },
          }])
          proc = self.start_beat()
          self.wait_until(lambda: self.output_lines() > 0)
          proc.check_kill_and_wait()
          self.assert_no_logged_warnings()
  
          output = self.read_output_json()
          event = output[0]
          self.assert_fields_are_documented(event)
  
          self.assertEqual(service_name, event["service"]["name"])
  